阅读说明：本技术 一种防喷枪堵塞的方法及喷射快速凝固材料的多组分喷枪 (Method for preventing blowout gun from being blocked and multi-component spray gun for spraying rapid solidification material ) 是由 曹长鹤 刘绍燕 于 2021-10-21 设计创作，主要内容包括：本发明涉及一种防喷枪堵塞的方法及喷射快速凝固材料的多组分喷枪,快速凝固材料例如聚氨酯泡沫,聚脲等,它们在其组分混合后快速发生反应,通常在几秒内凝固。本发明旨在解决空气清洁型多组分喷枪在喷射快速凝固材料时发生堵塞的问题。为了实现该目的,在喷枪的前端室设计有可供泄露的快速凝固材料排出的空气通道,当扣动喷枪扳机喷射快速凝固材料时,如果有快速凝固材料在侧密封件与混合室相接触部位的区域泄露至前端室,泄露的快速凝固材料会随经过的压缩空气从所述空气通道吹出至喷枪外部,从而不会积累在前端室反应固化堵塞喷枪,彻底解决喷枪堵塞问题。(The present invention relates to a method of preventing gun plugging and to a multi-component spray gun for spraying a fast setting material, such as polyurethane foam, polyurea, etc., which reacts rapidly after mixing of its components, typically setting within a few seconds. The invention aims to solve the problem that an air cleaning type multi-component spray gun is blocked when spraying a quick setting material. In order to achieve the purpose, an air channel for discharging leaked quick setting materials is designed in the front end chamber of the spray gun, when the trigger of the spray gun is pulled to spray the quick setting materials, if the quick setting materials are leaked to the front end chamber in the area of the contact part of the side sealing piece and the mixing chamber, the leaked quick setting materials can be blown out to the outside of the spray gun from the air channel along with passing compressed air, so that the leaked quick setting materials cannot accumulate in the front end chamber to react, solidify and block the spray gun, and the problem of blockage of the spray gun is thoroughly solved.)

1. A method for preventing a blowout gun from being blocked is characterized by comprising the following steps: an air channel for discharging leaked quick setting material is designed in the front end chamber of the spray gun, and the air channel guides the compressed air entering the front end chamber to be blown out of the spray gun through the area of the contact part of the side sealing piece and the mixing chamber; when the spray gun trigger is pulled to spray the quick setting material, if the quick setting material leaks to the front end chamber in the area of the contact part of the side sealing piece and the mixing chamber, the leaked quick setting material can be blown out to the outside of the spray gun from the air channel along with passing compressed air, so that the quick setting material cannot be accumulated in the front end chamber to react and solidify to block the spray gun.

2. The method of claim 1, wherein the direction of air blown out of the air passageway to the exterior of the spray gun is different than the direction of the mixing chamber injecting the rapidly setting material; whether the rapid solidification material leaks to the front end chamber can be judged by observing whether the air blown out from the air channel contains the rapid solidification material; if the air blown out by the air channel is clean air, no quick setting material leaks to the front end chamber; if the air blown from the air channel contains a fast setting material, it is indicated that there is leakage of the fast setting material into the front end chamber.

3. A plural component spray gun for spraying fast setting material, said spray gun comprising:

a gun body;

a front end chamber that utilizes the method of blowout preventer gun plugging described in claims 1-2.

4. The spray gun of claim 3 further comprising a plurality of air passages located within said gun body, said plurality of air passages connecting said grease nipple, air piston, trigger piston, front end chamber.

5. The spray gun of claim 3 further comprising:

a leak discharge nozzle located in the front end chamber;

a leak vent valve located in the front end chamber; by rotating the leakage discharge valve, the air blown out by the leakage discharge nozzle can be adjusted in size; the direction of the air blown out of the spray gun by the leakage discharge nozzle is different from the direction of the quick setting material sprayed by the mixing chamber.

6. The spray gun of claim 3 further comprising a side block A and a side block B secured to either side of the front end chamber by screws, said side block A comprising an A housing, a side seal box, a filter check valve and a shut-off valve; the side block B comprises a shell B, a side sealing box, a filtering check valve and a shutoff valve; the side sealing box, the filtering check valve and the shutoff valve are fixed in the shell A and the shell B through threads, each of the side sealing box, the filtering check valve and the shutoff valve is provided with an O-shaped ring which is matched and sealed with the shell A and the shell B, and the installation position of the O-shaped ring is closer to fluid than the threads, so that the fluid cannot contact the threads at the fixing positions of the side sealing box, the filtering check valve and the shutoff valve with the shell A and the shell B.

7. The spray gun of claim 6, wherein the side seal box comprises a housing and a side seal, the inner hole of the housing is a through hole, and the diameter of the inner hole of the housing at any position is larger than the maximum diameter of the side seal.

Technical Field

The invention relates to a method for preventing a spray gun from being blocked and a multi-component spray gun for spraying a quick setting material, and aims to solve the problem that the air cleaning type multi-component spray gun is blocked when the quick setting material is sprayed. Fast setting materials such as polyurethane foams, polyureas and the like, which react rapidly after mixing of their components, typically setting within a few seconds.

Background

In the known air cleaning type plural component spray gun for spraying the rapid solidification material, the rapid solidification material is often leaked to the front end chamber of the spray gun in the area of the contact part of the side sealing piece and the mixing chamber, if the leakage occurs when the trigger of the spray gun is pulled to spray the rapid solidification material, the leakage cannot be found, the leaked rapid solidification material is accumulated in the front end chamber and reacts and solidifies to block the front end chamber, so that the spray gun cannot work, and the rapid solidification material enters the gun body from the front end chamber even if the leakage occurs seriously, so that the front end chamber and the gun body are blocked simultaneously. Because the cured material is very strong, it usually takes a long time to clean the cured material, and improper cleaning even causes damage to the spray gun and scrapping, which greatly affects the efficiency of the quick setting material.

Disclosure of Invention

The invention provides a method for preventing a spray gun from being blocked and a multi-component spray gun for spraying a quick setting material, aiming at achieving the aim that the air cleaning type multi-component spray gun cannot be blocked when the quick setting material is sprayed.

In a first aspect, the present invention provides a method of preventing blockage in a lance, the lance having an air passage in a front end chamber thereof through which leaked rapidly setting material may exit, the air passage being configured to direct compressed air entering the front end chamber to blow out of the lance through an area where a side seal contacts a mixing chamber; when the spray gun trigger is pulled to spray the quick setting material, if the quick setting material leaks to the front end chamber in the area of the contact part of the side sealing piece and the mixing chamber, the leaked quick setting material can be blown out to the outside of the spray gun from the air channel along with passing compressed air, so that the quick setting material cannot be accumulated in the front end chamber to react and solidify to block the spray gun.

The direction of the air blown out to the outside of the spray gun by the air channel is different from the direction of the quick setting material sprayed by the mixing chamber, and the pattern of the quick setting material sprayed by the mixing chamber is not influenced no matter the size of the air blown out by the air channel.

Whether the rapid solidification material leaks to the front end chamber can be judged by observing whether the air blown out from the air passage contains the rapid solidification material. If the air blown out by the air channel is clean air, no quick setting material leaks to the front end chamber; if the air blown from the air channel contains a fast setting material, it is indicated that there is leakage of the fast setting material into the front end chamber.

The amount of the rapid solidification material contained in the air blown out from the air channel can be roughly judged to be small leakage or serious leakage, and for the condition that the small amount of the rapid solidification material is leaked to the front end chamber, the leaked rapid solidification material is continuously blown out from the air channel and cannot be accumulated in the front end chamber to react, solidify and block the spray gun, so that the spray gun can be maintained without stopping the spray gun for maintenance and continuously sprayed, the spray gun can be maintained after working, a large amount of working time can be saved, and the phenomenon which cannot be realized in the traditional spray gun can be avoided. For the condition that a large amount of rapid solidification materials are leaked to the front end chamber, the leaked rapid solidification materials are blown out continuously from the air channel, the leaked rapid solidification materials cannot accumulate in the front end chamber of the gun to react and solidify to block the spray gun, and the spray gun can be detached quickly to replace consumables. The invention enables the working state of the spray gun to be visualized, thoroughly solves the blockage problem of the multi-component spray gun which most troubles the spraying of the rapid solidification material, greatly improves the construction efficiency of the rapid solidification material and reduces the risk of damage to the spray gun.

In a second aspect, the present invention provides a plural component spray gun for spraying rapidly setting material wherein the front end chamber of the spray gun of the present invention is designed with an air passage for venting leaked rapidly setting material by the method of the present invention for preventing clogging of the spray gun, the air passage being configured to direct compressed air entering the front end chamber to blow out to the exterior of the spray gun through the area where the side seal contacts the mixing chamber.

The leakage discharge valve is located in the front end chamber, and the size of air blown out by the leakage discharge nozzle can be adjusted by rotating the leakage discharge valve. Reveal the discharge nozzle and blow off the direction of the outside air direction of spray gun and the direction difference of mixing chamber injection rapid solidification material, no matter reveal the discharge nozzle and blow off the air size and do not influence the spray gun and spout the pattern of rapid solidification material.

The grease nozzle is positioned on the gun body, and a plurality of air channels positioned in the gun body are connected with the grease nozzle, the air piston, the trigger piston and the front end chamber. Under the condition that the spray gun is not disassembled, lubricating grease is filled through the grease nozzle, and the lubricating grease can be blown to the gun body and the cavity of the front end chamber by compressed air along the plurality of air channels so as to lubricate an O-shaped ring and metal parts in the cavity, reduce abrasion and prolong the working time of the spray gun as far as possible. Maintenance lubrication of the spray gun is allowed to be accomplished without disassembling the spray gun, thereby avoiding the problem of crystallization and solidification of the rapidly solidified material when its components such as resin or isocyanate are exposed to air.

The side sealing box, the filtering check valve and the shutoff valve are fixed in the A shell and the B shell through threads, each of the side sealing box, the filtering check valve and the shutoff valve is provided with an O-shaped ring which is matched and sealed with the A shell and the B shell, and the installation position of the O-shaped ring is closer to fluid than the threads, so that the fluid can not contact the threads at the fixing positions of the side sealing box, the filtering check valve and the shutoff valve with the A shell and the B shell. So that the situation that the threads are disassembled and damaged with considerable labor intensity after the threads are stuck due to the crystallization of the resin or isocyanate component at the threads does not occur.

The side seal box comprises a shell and a side seal, wherein an inner hole of the shell is a through hole, and the diameter of any position of the inner hole is larger than the maximum diameter of the side seal. When the O-shaped ring on the side sealing element needs to be replaced, the tool can be used for contacting the non-sealing surface of the side sealing element to push the side sealing element out towards the other end of the shell, and the tool cannot be used for contacting the sealing surface of the side sealing element and damaging the sealing surface of the side sealing element. Therefore, the side sealing piece can not be taken out from one end of the shell only, and the used tool can contact the sealing surface of the side sealing piece, because the sealing surface of the side sealing piece is similar to a very smooth mirror surface, the used tool can easily damage the sealing surface of the side sealing piece, once the sealing surface of the side sealing piece is damaged, the sealing surface of the mixing chamber contacted with the side sealing piece can be damaged, the sealing surface of the mixing chamber is also similar to a very smooth mirror surface, and simultaneously, quick-setting materials can be leaked into the spray gun, so that great potential hazards are caused to the blockage of the spray gun.

These and other objects of the present invention will become more fully apparent from the following description taken in conjunction with the accompanying drawings, wherein like reference characters designate the same or similar parts throughout the several views.

Drawings

FIG. 1 is a schematic representation of the working principle of the method of the invention for preventing blockage of a lance in the absence of leakage of fast setting material into the front end chamber.

FIG. 2 is a schematic representation of the principle of the present invention of the method of plugging a spray gun when there is leakage of fast setting material into the nose chamber.

FIG. 3 is a side perspective view of the spray gun of the present invention.

FIG. 4 is another side perspective view of the spray gun of the present invention.

FIG. 5 is a partial cross-sectional view of the spray gun of the present invention.

FIG. 6 is an exploded view of the A-side block of the spray gun of the present invention.

FIG. 7 is an exploded view of the B-side block of the spray gun of the present invention.

FIG. 8 shows a partial cross-sectional view of the A-side block of the spray gun of the present invention.

FIG. 9 shows a partial cross-sectional view of the B-side block of the spray gun of the present invention.

FIG. 10 is an exploded view of the side seal box of the spray gun of the present invention.

FIG. 11 is an exploded view of the side seal box of the spray gun of the present invention.

FIG. 12 shows a side seal cartridge of the spray gun of the present invention in partial cross-sectional and exploded view.

FIG. 13 shows an exploded view of the filter check valve of the spray gun of the present invention.

FIG. 14 shows an exploded view of the shut-off valve of the spray gun of the present invention.

FIG. 15 is an exploded view of the spray gun of the present invention.

Detailed Description

The method of the present invention for preventing plugging of a spray gun is fully illustrated in fig. 1 and 2, wherein an air passage 16b is provided in the front end chamber 16 of the spray gun for discharging leaked rapidly setting material, said air passage 16b being configured to direct compressed air 44 entering the front end chamber 16 to be blown out of the spray gun through the area where the side seal 30 contacts the mixing chamber 18; the direction of the air blown out of the air passage 16b to the outside of the spray gun is different from the direction in which the mixing chamber 18 sprays the rapidly solidified material, and the pattern in which the mixing chamber 18 sprays the rapidly solidified material is not affected by the size of the air blown out of the air passage 16 b.

As shown in FIG. 1, during the process of delivering the components 45 and 46 of the rapidly solidified material from the side seal 30 to the mixing chamber 18 when the gun trigger is pulled to eject the rapidly solidified material, the compressed air 44 entering the front chamber 16 does not leak into the front chamber 16 in the region where the side seal 30 contacts the mixing chamber 18, and the clean air 44 is blown out of the air passage 16b through the region where the side seal 30 contacts the mixing chamber 18.

As shown in FIG. 2, during the process of injecting the rapidly setting material by pulling the gun trigger, the components of the rapidly setting material, fluid 45 and fluid 46, leak into the front end chamber 16 in the region where the side seal 30 contacts the mixing chamber 18, the compressed air 44 entering the front end chamber 16 blows the air 44, fluid 45 and fluid 46 out of the air passage 16b through the region where the side seal 30 contacts the mixing chamber 18, so that the fluid 45 and fluid 46 do not accumulate in the front end chamber 16 and react to solidify and clog the gun.

The plural component spray gun of the present invention for spraying fast setting materials is shown in full in figures 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15.

As shown in fig. 5, in which the front end chamber 16 of the spray gun of the present invention is plugged with the blowout prevention gun method provided by the present invention, an air passage 16b for discharging leaked rapidly solidified material is designed in the front end chamber 16, and the air passage 16b is blown out to the outside of the spray gun through the area where the side seal 30 contacts the mixing chamber 18 to guide the compressed air entering the front end chamber 16.

As shown in fig. 5, the leakage escape valve 23 is installed in the front end chamber 16 and is sealed in cooperation with the front end chamber 16 by 1O-ring 26. The leakage discharge nozzle 41 is fixed to the air passage 16b in the front end chamber 16, the air passage 16b is completely sealed by the tapered surface at the top of the leakage discharge valve 23, and the amount of air blown out by the leakage discharge nozzle 41 can be adjusted by rotating the leakage discharge valve 23. The direction of the air blown out of the spray gun by the leakage discharge nozzle 41 is different from the direction in which the rapid solidification material is sprayed by the mixing chamber 18, and the pattern in which the rapid solidification material is sprayed by the mixing chamber 18 is not affected regardless of the size of the air blown out by the leakage discharge nozzle 41.

As shown in fig. 5, the spray gun is connected with a compressed air source through an air interface 11, a grease nozzle 14 is positioned on the gun body 1, and a plurality of air channels 1a,1b and 1c positioned in the gun body 1 are connected with the grease nozzle 14, an air piston 2, a trigger piston 7 and a front end chamber 16. Under the condition of not disassembling the spray gun, lubricating grease is filled through the grease nipple 14, and the lubricating grease can enter the cavities 1d and 1e of the gun body 1 along the air channel 1a in the gun body 1 and enter the cavity 16a of the front end chamber 16 along the air channels 1b and 1c along with compressed air so as to lubricate an O-shaped ring and metal parts in the cavities and prolong the working time of the spray gun as far as possible. Maintenance lubrication of the spray gun is allowed to be accomplished without disassembling the spray gun, thereby avoiding the problem of crystallization and solidification of the rapidly solidified material when its components such as resin or isocyanate are exposed to air.

As shown in fig. 6, the a-side block includes an a-case 28, a side seal box 47, a filter check valve 48, a shut-off valve 49, and a screw 42.

As shown in fig. 7, the B-side block includes a B-housing 40, a side sealing box 47, a filtering check valve 48, a cut-off valve 49, and screws 42.

As shown in fig. 3 and 4, the a-side block and the B-side block are fixed to both sides of the front end chamber 16 by 2 screws 19, respectively.

As shown in fig. 10, the side seal cartridge 47 is composed of a housing 31, a side seal 30, a spring 29, and O-rings 8 and 38.

As shown in fig. 13, the filtering check valve 48 is composed of a main body 32, an O-ring 38, a filtering mesh 43, a spring 33, a steel ball 39 and a valve seat 34.

As shown in fig. 14, the shutoff valve 49 is composed of the valve stem 35, the nut 36, the O-ring 8, and the gasket 37.

As shown in fig. 8, a side seal box 47, a filter check valve 48, and a shut-off valve 49 are screwed to the a-case 28. The O-ring 38 on the side seal cartridge 47 is fitted to seal with the a housing 28, and the O-ring 38 on the side seal cartridge 47 is installed at a position closer to the fluid than the threads 31a on the side seal cartridge 47, so that the fluid does not contact the threads 31a on the side seal cartridge 47 and the threads 28a on the a housing 28. The O-ring 38 on the filtering check valve 48 is fitted to seal with the a housing 28, and the O-ring 38 on the filtering check valve 48 is mounted closer to the fluid than the threads 32a on the filtering check valve 48 so that the fluid does not contact the threads 32a on the filtering check valve 48 and the threads 28b on the a housing 28. The O-ring 8 on the shut off valve 49 is fitted to seal with the a housing 28 and the O-ring 8 on the shut off valve 49 is mounted closer to the fluid than the threads 35a on the shut off valve so that the fluid does not contact the threads 35a on the shut off valve 49 and the threads 28c on the a housing 28. So that the situation that the threads are disassembled and damaged with considerable labor intensity after the threads are stuck due to the crystallization of the resin or isocyanate component at the threads does not occur.

As shown in fig. 9, a side sealing box 47, a filtering check valve 48, and a cut-off valve 49 are screwed to the B housing 40. The O-ring 38 on the side seal cartridge 47 is fitted to seal with the B housing 40, and the O-ring 38 on the side seal cartridge 47 is installed at a position closer to the fluid than the screw 31a on the side seal cartridge 47, so that the fluid does not contact the screw 31a on the side seal cartridge 47 and the screw 40a on the B housing 40. The O-ring 38 on the filtering check valve 48 is fitted to seal with the B housing 40, and the O-ring 38 on the filtering check valve 48 is mounted closer to the fluid than the threads 32a on the filtering check valve 48 so that the fluid does not contact the threads 32a on the filtering check valve 48 and the threads 40B on the B housing 40. The O-ring 8 on the shut-off valve 49 is fitted to seal with the B housing 40 and the O-ring 8 on the shut-off valve 49 is installed closer to the fluid than the threads 35a on the shut-off valve 49 so that the fluid does not contact the threads 35a on the shut-off valve 49 and the threads 40c on the B housing 40. So that the situation that the threads are disassembled and damaged with considerable labor intensity after the threads are stuck due to the crystallization of the resin or isocyanate component at the threads does not occur.

As shown in fig. 10, 11 and 12, the inner hole of the housing 31 of the side seal box 47 is a through hole, and the diameter d2 of the inner hole at any position is larger than the maximum diameter d1 of the side seal 30. When it is necessary to replace the O-ring 8 on the side seal 30, the side seal 30 can be pushed out toward the other end of the housing 31 by contacting the non-sealing surface 30b of the side seal 30 with a tool, without contacting the sealing surface 30a of the side seal 30 and damaging the sealing surface 30a of the side seal 30.

Various changes and modifications may be made to the method without departing from the spirit and scope defined by the following claims.