CN100391618C - Double component nanometer material spray gun - Google Patents

Double component nanometer material spray gun Download PDF

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Publication number
CN100391618C
CN100391618C CNB2005100698457A CN200510069845A CN100391618C CN 100391618 C CN100391618 C CN 100391618C CN B2005100698457 A CNB2005100698457 A CN B2005100698457A CN 200510069845 A CN200510069845 A CN 200510069845A CN 100391618 C CN100391618 C CN 100391618C
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CN
China
Prior art keywords
rifle body
handle
mixing reaction
spray gun
feed bin
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Expired - Fee Related
Application number
CNB2005100698457A
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Chinese (zh)
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CN1672803A (en
Inventor
魏丽乔
戎文华
李万捷
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Taiyuan University of Technology
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Taiyuan University of Technology
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Priority to CNB2005100698457A priority Critical patent/CN100391618C/en
Publication of CN1672803A publication Critical patent/CN1672803A/en
Application granted granted Critical
Publication of CN100391618C publication Critical patent/CN100391618C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The present invention discloses a bicomponent nanometer material spray gun which is characterized in that the electric cleaning and massage spray head is provided with a spray head, a gun body and a spray gun handle, wherein the spray head is provided with a positive rotation material mixing reaction bin and a reverse rotation material mixing reaction bin; the gun body is connected with the spray head and is provided with a first gun body material bin, a second gun body material bin, a material bin leading flow passage and a control valve of the leading flow passage; the spray gun handle is hinged on a rear cover of the gun body, is provided with a spray gun switch handle and a spray quantity handle control member, and is connected with the gun body. The nanometer material is uniformly mixed by the positive rotation material mixing reaction bin and the reverse rotation material mixing reaction bin of the bicomponent nanometer material spray gun, and the positive rotation material mixing reaction bin and the reverse rotation material mixing reaction bin have simple structure and are convenient to disassemble and assemble or change and clean. The bicomponent nanometer material spray gun is matched with a pressure material supply system, is used for the cold preservation and heat preservation of different bicomponent nanometer materials in chemical pipelines, the heat insulation and water prevention of roofs, the heat insulation and cold preservation of cold banks and refrigeration industry, the transportation, storage, collision prevention and protection of precision instruments, the heat preservation and protection of casual tents in disaster areas, etc., is used for the blocking of other industries, the filling of cavities and the natural spraying of other bicomponent nanometer materials, and is a novel automatic spraying bicomponent nanometer material high-tech spray gun.

Description

Double component nanometer material spray gun
Technical field
The present invention relates to a kind of dual component material spray gun, particularly a kind of a kind of double component nanometer material spray gun that comprises shower nozzle, rifle body and handle from spraying.
Background technology
Be applied to the spray gun of nanoscale material in the prior art, its spraying material range of application and the wider spray gun of the spraying object scope of application, particularly material is when reaching nano level, the very thin honey of material can carry out the spray gun of spraying certainly that the bi-component nanomaterial mixes and also not meet report in spray gun." foam gap filler spray gun " utility model patent of CN2505181Y, comprise barral of a gun, rifle body and handle, its primary structure is that the part that handle contacts with people's centre of the palm is that circular arc is outwards protruded, a side that contacts with finger when handle is held with a firm grip with staff is provided with a barrier blocks, when the position of this barrier blocks is positioned at trigger near handle near the below of handle end, when staff was held with a firm grip, this barrier blocks can be separated the forefinger and the middle finger of staff cocking.This foam joint filling spray gun mainly is to improve on handle, and its structure mainly is applicable to the narrow slit filling, and locally sprayed, for quick cap holes or tunnel emitted dose deficiency, and spraying effect is not good.USP4399.930 discloses the United States Patent (USP) that a kind of name is called " foam distribution rifle ", this spray gun structure is to be provided with inlet valve on handle, and by connecing the charging aperture that mouth is communicated with sprinkler body, be provided with slot on both sides, sprinkler body frame lower surface, and in the slot with the corresponding insert edge insertion in both sides, handle upper surface sprinkler body frame, the place is hinged with trigger at sprinkler body frame outer wall pivot point, and make trigger rotation roof pressure needle make the needle switch, be provided with chute and be communicated with fixing hole at sprinkler body frame middle part, and two sprinkler body fixed axis on the sprinkler body are packed in the fixing hole on the sprinkler body frame, it is corresponding with the valve body discharging opening and be connected that two charging apertures of sprinkler body connect mouth by two.If the spraying of the spray gun applying nano material of this structure, there are the following problems in meeting: the one, and material flow velocity rotation in the spray gun blending bunker mixes even inadequately, causes spraying effect poor, the quality instability; The 2nd, the spray gun structure complexity, very narrow during the material spraying through the runner of needle-valve, be easy to stop up, clean inconvenience, flow is little, dismounting inconvenience; The 3rd, when the spray gun material enters blending bunker, there is not dual component material to compare control device, can not regulate the material ratio of bi-component, can not control the size of material quantity for spray, limit the range of application and the spraying scope to various two-component spraying materials of this device like this.
Through retrieval and market survey, existing automatic spray gun all is not suitable for nano level or very fine and closely woven spraying material and uses, main cause is easy adhesion caking and stops up, the inventor tests after further research, the trial assembly spherula carries out hybrid reaction in the spray gun mixing bunker, but adhesion caking and clogging are even more serious, find to select for use the positive and negative rotation hybrid reaction storehouse of an amount of diameter and length at last through test of many times, simple in structure, be difficult for stopping up, cleaned and changed easily, hybrid reaction is effective, has increased service time more than three times.
Summary of the invention
The problem to be solved in the present invention is the bi-component nanomaterial when spraying, and material mixes even inadequately in spray gun, easy adhesion caking and stopping up, and also uncontrollable dual component material is quantity for spray when, and the complicated inconvenience mounting or dismounting of spray gun structure are cleaned or replacing.The purpose of this invention is to provide a kind of simple in structure and double component nanometer material spray gun that easy mounting or dismounting are cleaned or changed, mix.
Based on above-mentioned problem and purpose, the present invention will solve the measure that nanometer material spray gun takes and comprise shower nozzle, rifle body and handle, and its architectural feature is: a shower nozzle that is provided with dextrorotation batch mixing reaction warehouse and derotation batch mixing reaction warehouse is arranged; Have one connect shower nozzle be provided with the first rifle body feed bin and the second rifle body feed bin, and be connected with the first rifle body feed bin guiding in channel and the second rifle body feed bin guiding in channel and control the first rifle body feed bin guiding in channel control valve of mass flow ratio and the rifle body of the second rifle body feed bin guiding in channel control valve; A quantity for spray handle control piece that is articulated in the Switch of spray pistol handle that is provided with the control first rifle body feed bin and the second rifle body feed bin on the rifle body and is provided with and the spray gun handle that is connected on the rifle body are arranged.
Above the shower nozzle termination of described spray gun be provided with shower nozzle changing-over head; In shower nozzle, be provided with dextrorotation batch mixing reaction warehouse introducing port and the dextrorotation batch mixing reaction warehouse export mouth and the dextrorotation batch mixing reaction warehouse eddy flow plate of dextrorotation batch mixing reaction warehouse; Be provided with derotation batch mixing reaction warehouse introducing port and the derotation batch mixing reaction warehouse export mouth and the derotation batch mixing reaction warehouse eddy flow plate of derotation batch mixing reaction warehouse; Front portion at shower nozzle also is provided with flow distribution plate.
Above the dextrorotation batch mixing reaction warehouse of described spray gun and the diameter of derotation batch mixing reaction warehouse be 20mm~50mm, its diameter/length is 1/2.5.
Above the termination portion of rifle body of described spray gun be provided with the rifle body and connect and change head and rifle body feed bin seal, and the seal bar that is provided with rifle body feed bin export mouth and corresponding therewith rifle body feed bin export mouth seal head on the rifle body feed bin seal, connects rifle body feed bin export mouth seal head with and on sheathed seal bar spring and rifle body feed bin seal bar control head, on seal bar, also be provided with seal bar spring mountings and seal bar spring stator seal; The other end of rifle body be provided with rifle body locking device and on fixing Switch of spray pistol handle bearing, by rifle body fixture sealing and fixing; On the rifle body, also be provided with rifle body handle slot and handle socket fixing hole.
Above the Switch of spray pistol handle of described spray gun be and handle one side arc shape and be raised in the Switch of spray pistol handle of handle one side arc mutually, its upper end is provided with seal bar handle gauge tap borehole jack and is located on the seal bar, and its Switch of spray pistol handle is hinged on the Switch of spray pistol handle bearing.
Above the spray gun handle of described spray gun be to hold handle with hand shape matches, its upper end be provided with the rifle body on the corresponding rifle body of rifle body handle slot handle socket, and insert in its slot, be fixed in the handle socket fixing hole by the handle socket fixture.
The present invention is in order to make that hybrid reaction is even in the hybrid reaction storehouse of bi-component nanoscale material in the spray gun shower nozzle, flow behavior according to nanomaterial, the inventor is provided with dextrorotation batch mixing reaction warehouse and derotation batch mixing reaction warehouse in the shower nozzle of spray gun, the positive and negative eddy flow reaction process and the time of material have been increased, material is after the dextrorotation hybrid reaction, carry out the derotation hybrid reaction again, make the nanoscale material carry out sufficient hybrid reaction, overcome unidirectional mixing of materials reaction of the prior art, not only make mixing of materials even inadequately, and make the problem of feed separation easily; The inventor through repeatedly studying and testing, and relatively with existing spray gun test, adopt the mixing structure of positive and reverse return, the diameter that its positive and reverse return mixes reaction warehouse is 20mm~50mm, and its diameter/length is 1/2.5 to be optimal selection, the innovative point of this structure at first is can be even with the abundant hybrid reaction of nanomaterial, next is this structure cyclone reaction, and speed is fast, is difficult for adhesion caking and obstruction in revolving mixed reaction warehouse, spraying effect is comparatively desirable, and has increased service time more than three times.The present invention considers that simultaneously this installs the characteristics of fast spraying whenever and wherever possible, and the general structure of this spray gun is simple, and easy disassembly or replacing are cleaned, and its shower nozzle, batch mixing reaction warehouse, rifle body and handle can be installed and removed easily by interface and change and clean.In addition, the rifle body of spray gun is provided with the device of control material quantity for spray and the device of control bi-component nanomaterial ratio, the proportioning that can spray Flow-rate adjustment and nanomaterial according to the object or the occasion difference of nanomaterial and spraying is regulated, go for of the spraying of different bi-component nanomaterials like this in different occasions, enlarge spray gun and used the scope of spraying nanomaterial and the range of application of spraying object, under particular surroundings or under the emergency situation, this device is avoided electricity consumption and power-equipment, can block up back spraying sealing secluding air quickly and easily on the hurdle, avoid the generation of accident, particularly in mine laneway, take place in the gas, this device can carry out the spraying sealing after the hurdle blocks up apace, isolated pernicious gas is avoided gas explosion.For example, in the storage tank of two jars notes nanoscale combined polyethers or the pure and mild vulcabond of polyester polyols, give spray gun with material supply after the pressurising, can be applicable to the rapid sealing and the permanent shutoff of colliery underworkings, the secluding air circulation, the control air flow also can spray the tunnel, prevents falling of tunnel top margin and country rock coal cinder, can significantly reduce simultaneously the generation of accident and disaster, be the high-efficiency appliance of colliery rescue and relief work; Spray gun of the present invention is equipped with behind the material suppling system; also can be applicable to the cold insulation insulation of chemical pipeline; the roofing heat preservation and insulation waterproof; freezer and refrigeration industry cold insulation; the precision instrument transportation stores preventing collision protection; the insulation protection of disaster area makeshift tent etc., what also be applicable to other industry stops and the spraying naturally of cavity filling and other bi-component raw material that the present invention is that a kind of novel dual-component automatic spray is coated with the scientific and technological device of office.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention
Fig. 2 is the internal structure schematic diagram of shower nozzle of the present invention
Fig. 3 is the cross section structure schematic diagram of rifle body of the present invention
Fig. 4 is the cross-sectional view of handle of the present invention and Switch of spray pistol handle
Fig. 5 is the right TV structure schematic diagram of Switch of spray pistol handle of the present invention
Fig. 6 is the left TV structure schematic diagram of Switch of spray pistol handle of the present invention
:1: 2: 3: 4: 5: 6:7: 8: 9: 10: 11: 12: 13: 14: 15:16: 17: 18: 19: 20: 21: 22: 23: 24: 25: 26: 27: 28:29: 30: 31: 32: 33: 34: 35: 36: 37: 38:
The specific embodiment
The present invention is described in more detail below in conjunction with drawings and Examples, and present embodiment is to further describe of the present invention, does not open the present invention is made any qualification.
Embodiment 1
The present invention is according to technical scheme and accompanying drawing 1~6 thereof, adopt the high-quality steel, refining with mechanical manufacturing method, the connecting portion of shower nozzle and rifle body adopts matching thread to be connected, but all should be by there being pressing system to make in whole gun system, to the making of spray gun and parts with install should be accurately supporting.In addition, this spray gun is to be equipped with the bi-component nanomaterial storage tank that has pressure and to constitute the passage that connects spray gun.
In Fig. 1~6, the primary structure in the whole spray gun is: a shower nozzle 1 that is provided with dextrorotation batch mixing reaction warehouse 16 and derotation batch mixing reaction warehouse 13 is arranged; There is one to be connected and to be provided with the first rifle body feed bin 26 and the second rifle body feed bin 30 on the shower nozzle 1, and is connected with the first rifle body feed bin guiding in channel 6 and the second rifle body feed bin guiding in channel 7 and the first rifle body feed bin guiding in channel control valve 4 of control mass flow ratio and the rifle body 2 of the second rifle body feed bin guiding in channel control valve 5; A quantity for spray handle control piece 10 that is articulated in the Switch of spray pistol handle 11 that is provided with the control first rifle body feed bin 26 and the second rifle body feed bin 30 on the rifle body 2 and is provided with and the spray gun handle 12 that is connected on the rifle body 2 are arranged.
Wherein, the termination of spray gun shower nozzle 1 is provided with refining screw thread shower nozzle changing-over 19; In shower nozzle 1, be provided with the dextrorotation batch mixing reaction warehouse introducing port 18 and dextrorotation batch mixing reaction warehouse export mouth 15 and dextrorotation batch mixing reaction warehouse eddy flow plate 17 of dextrorotation batch mixing reaction warehouse 16, introducing port 18 wherein and export mouth 15 are the uniform circular hole on the batch mixing reaction warehouse radius, eddy flow plate 17 wherein is exactly the spiral plate of Flow of Goods and Materials, can make material helical flow in the direction of the clock; In shower nozzle 1, be provided with the derotation batch mixing reaction warehouse introducing port 20 and derotation batch mixing reaction warehouse export mouth 21 and derotation batch mixing reaction warehouse eddy flow plate 14 of derotation batch mixing reaction warehouse 13, introducing port 20 wherein and export mouth 21 are the uniform circular hole on the batch mixing reaction warehouse radius, eddy flow plate 14 wherein is exactly the spiral plate of Flow of Goods and Materials, can make material counter-clockwise direction helical flow; The dextrorotation batch mixing reaction warehouse 16 in spray gun shower nozzle 1 and the length ratio of derotation batch mixing reaction warehouse 13 are 1: 1, the ratio of the length of its diameter/positive and reverse return batch mixing reaction warehouse is 1/2.5, the optimum value of the diameter/length of its positive and reverse return batch mixing reaction warehouse is 30mm/75mm, also is provided with flow distribution plate 22 in the front portion of shower nozzle 1;
Wherein, the termination portion of spray gun rifle body 2 is provided with refining screw thread rifle body and connects and change 23 and rifle body feed bin seal 34, and the seal bar 27 that is provided with rifle body feed bin export mouth 24 and corresponding therewith rifle body feed bin export mouth seal head 25 on the rifle body feed bin seal 34, connects rifle body feed bin export mouth seal head 25 with and on sheathed seal bar spring 28 and rifle body feed bin seal bar control head 8, on seal bar 27, also be provided with seal bar spring mountings 32 and seal bar spring stator seal 31; Be provided with on the other end bonnet of rifle body 2 rifle body locking device 29 and on be fixedly connected with Switch of spray pistol handle bearing 9, the first rifle body feed bin mozzle and the second rifle body feed bin mozzle, by rifle body fixture 3 sealing and fixing; On rifle body 2, also be provided with rifle body handle slot 33 and handle socket fixing hole 35.
Wherein, Switch of spray pistol handle 11 is and shape and that the be raised in handle 12 1 side arcs mutually Switch of spray pistol handle 11 of handle 12 1 side arcs, its upper end is provided with seal bar handle gauge tap hole 38 and is set on the seal bar 27, and its Switch of spray pistol handle 11 is hinged on the Switch of spray pistol handle bearing 9, make that the degree of tightness of holding handle 12 can be by the switch of rifle body feed bin export mouth seal head 25 control spray guns.
Wherein, spray gun handle 12 is to hold handle with hand shape matches, its upper end be provided with rifle body 2 on rifle body handle slot 33 corresponding rifle body handle sockets 36, and insert in its slot, be screwed in the handle socket fixing hole 35 by screwed handle socket fixture 37 and be fixed in the handle socket fixing hole.
Embodiment 2
Spray gun according to embodiment 1 making, if be used for coal mine roadway, when cementation of fissures leak stopping is carried out in slits such as mining area, should make the nanomaterial storage tank, and in a material storage tank, charge into or inject elastic polyurethane performed polymer 3~5Kg and trichloroethylene solvent 0.5~2.5MPa, charge in another material storage tank or inject diamine or dihydroxylic alcohols crosslinking agent 0.5~2Kg, the material tank inner pressure is 1.5~2.5MPa, on the material storage tank, be provided with valve and passage and be communicated with spray gun, during spraying, open the valve on the material storage tank, after the material ratio is opened and adjusted to the first rifle body feed bin guiding in channel control valve 4 on the first rifle body feed bin guiding in channel 6 on the spray gun rifle body and the second rifle body feed bin guiding in channel 7 and the second rifle body feed bin guiding in channel control valve 5, regulate the size of quantity for spray again, push down Switch of spray pistol handle 11 then, can carry out cementation of fissures leak stopping to slit in the mine, also can block stifledly to the tunnel in the mine earlier, spray sealing then.
Embodiment 3
Spray gun with embodiment 1 making, using method according to embodiment 2, if when in the rescue and relief work process, setting up interim heat-preserving tent, can in the nanomaterial storage tank, charge into or inject MDI:5~10kg, aerosol (F-22): 0.5~1.0kg, pressure: 1.5~2.5MPa; Pour the spraying combined polyether in another material storage tank (1); 4~8kg, aerosol (F-22): 2~3kg, pressure: 1.5~2.5MPa is being to spray the makeshift tent that can set up rapidly every cold insulation on the base material framework with straw mat, braid over braid, canvas etc.

Claims (6)

1. double component nanometer material spray gun comprises shower nozzle (1), rifle body (2) and handle (12), it is characterized in that: a shower nozzle (1) that is provided with dextrorotation batch mixing reaction warehouse (16) and derotation batch mixing reaction warehouse (13) is arranged; There is one to connect being provided with the first rifle body feed bin (26) and the second rifle body feed bin (30) and being connected with the first rifle body feed bin guiding in channel (6) and the second rifle body feed bin guiding in channel (7) and the first rifle body feed bin guiding in channel control valve (4) of control mass flow ratio and the rifle body (2) of the second rifle body feed bin guiding in channel control valve (5) of shower nozzle (1); There is one to be articulated in the Switch of spray pistol handle (11) and the quantity for spray handle control piece (10) that is provided with thereof that being provided with the control first rifle body feed bin (26) and the second rifle body feed bin (30) on the rifle body (2) and to be connected spray gun handle (12) on the rifle body (2).
2. double component nanometer material spray gun according to claim 1 is characterized in that the termination of shower nozzle (1) is provided with shower nozzle changing-over head (19); In shower nozzle (1), be provided with the dextrorotation batch mixing reaction warehouse introducing port (18) and dextrorotation batch mixing reaction warehouse export mouth (15) and dextrorotation batch mixing reaction warehouse eddy flow plate (17), the derotation batch mixing reaction warehouse introducing port (20) that is provided with derotation batch mixing reaction warehouse (13) and derotation batch mixing reaction warehouse export mouth (21) and derotation batch mixing reaction warehouse eddy flow plate (14) of dextrorotation batch mixing reaction warehouse (16); Also be provided with flow distribution plate (22) in the front portion of shower nozzle (1).
3. double component nanometer material spray gun according to claim 2 is characterized in that the diameter of dextrorotation batch mixing reaction warehouse (16) and derotation batch mixing reaction warehouse (13) is 20mm~50mm, and its diameter/length is 1/2.5.
4. double component nanometer material spray gun according to claim 1, the termination portion that it is characterized in that rifle body (2) is provided with the rifle body and connects and change head (23) and a rifle body feed bin seal (34), and on rifle body feed bin seal (34), be provided with rifle body feed bin export mouth (24) and corresponding therewith rifle body feed bin export mouth seal head (25), the seal bar (27) that connects rifle body feed bin export mouth seal head (25) with and go up sheathed seal bar spring (28) and rifle body feed bin seal bar control head (8), on seal bar (27), also be provided with seal bar spring mountings (32) and seal bar spring stator seal (31); The other end at rifle body (2) is provided with rifle body locking device (29) and goes up fixing Switch of spray pistol handle bearing (9), by rifle body fixture (3) sealing and fixing; On rifle body (2), also be provided with rifle body handle slot (33) and handle socket fixing hole (35).
5. double component nanometer material spray gun according to claim 1, it is characterized in that Switch of spray pistol handle (11) is and handle (12) one side arcs shape and be raised in the Switch of spray pistol handle (11) of handle (12) one side arcs mutually, its upper end is provided with seal bar handle gauge tap hole (38) and is set on the seal bar (27), and its Switch of spray pistol handle (11) is hinged on the Switch of spray pistol handle bearing (9).
6. double component nanometer material spray gun according to claim 1, it is characterized in that spray gun handle (12) is to hold handle with hand shape matches, its upper end be provided with rifle body (2) on rifle body handle slot (33) corresponding rifle body handle socket (36), and insert in its slot, be fixed in the handle socket fixing hole (35) by handle socket fixture (37).
CNB2005100698457A 2005-04-30 2005-04-30 Double component nanometer material spray gun Expired - Fee Related CN100391618C (en)

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CN100391618C true CN100391618C (en) 2008-06-04

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104720198B (en) * 2015-03-09 2016-08-17 佛山市锦德机械设备有限公司 A kind of polyurethane injecting head for shoes making machine
CN109046819B (en) * 2018-11-01 2023-10-13 山西凝固力新型材料股份有限公司 Mining quick closing device and mixing spray gun thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5129581A (en) * 1991-05-01 1992-07-14 Insta-Foam Products, Inc. Nozzle for mixing and dispensing reduced CFC and non-CFC foams
US5462204A (en) * 1994-03-29 1995-10-31 Rhh Foam Systems, Inc. Foam dispensing gun
JPH1015443A (en) * 1996-06-28 1998-01-20 Achilles Corp Mixed liquid jetting device
DE19645614A1 (en) * 1996-11-06 1998-05-07 Dbs Gmbh Spray gun with assigned mixing chamber
JP2000140717A (en) * 1998-11-04 2000-05-23 Maruichi Valve Co Ltd Two-liquid mixing type portable spray gun
CN2671698Y (en) * 2003-10-14 2005-01-19 郑福明 Quick seal jet gun

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5129581A (en) * 1991-05-01 1992-07-14 Insta-Foam Products, Inc. Nozzle for mixing and dispensing reduced CFC and non-CFC foams
US5462204A (en) * 1994-03-29 1995-10-31 Rhh Foam Systems, Inc. Foam dispensing gun
JPH1015443A (en) * 1996-06-28 1998-01-20 Achilles Corp Mixed liquid jetting device
DE19645614A1 (en) * 1996-11-06 1998-05-07 Dbs Gmbh Spray gun with assigned mixing chamber
JP2000140717A (en) * 1998-11-04 2000-05-23 Maruichi Valve Co Ltd Two-liquid mixing type portable spray gun
CN2671698Y (en) * 2003-10-14 2005-01-19 郑福明 Quick seal jet gun

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Assignee: Foshan Zhongyao Ceramic Industry Development Co., Ltd.

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Contract fulfillment period: 2008.8.4 to 2013.8.3 contract change

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Denomination of invention: Double component nanometer material spray gun

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Assignor: Taiyuan University of Technology

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