Drip-proof high pressure spray gun

Abstract

The utility model discloses a kind of anti-dripping high-pressure spray guns, including main body, the inside of main body is provided with flow channel, the front end of flow channel is connected with spray head, first check valve is arranged in flow channel, first check valve includes first shell, valve core, second shell and first spring, first shell is connected with second shell, one end of first shell is provided with first communication hole, one end of first spring is in abutment with second shell, another end pushes valve core and moves towards first communication hole, until valve core blocks first communication hole;Second shell is provided with second communication hole on side surface, second communication hole is communicated with the spray head. In the process of spraying liquid, the pressure in chamber gradually reduces. When the pressure is lower than the elastic force of first spring to valve core, valve core blocks first communication hole, and cuts off the liquid sprayed at the end. Avoid the liquid sprayed at the end to form larger mist particles. Fall on the hand of user, pollute finger.

Description

Technical Field

[0001] This utility model relates to a drip-proof high-pressure spray gun, and more particularly to its first one-way valve, belonging to the field of spray gun technology. Background Technology

[0002] Spray guns are often used with bottles and cans, particularly in pharmaceutical and cosmetic packaging. The liquid is sprayed out in a mist. They utilize a ball bearing or gravity to seal the liquid, or use elastic plastic parts for sealing. When the lever is fully depressed, the liquid flow weakens, and the mist particles become larger. These large droplets can drip from the nozzle onto the user's hands, staining their fingers. Utility Model Content

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a drip-proof high-pressure spray gun. This solves the problem that existing spray guns have low liquid pressure at the end, causing liquid to drip onto the user's hands and contaminate their fingers.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a drip-proof high-pressure spray gun, comprising a main body, an internal flow channel, a nozzle connected to the front end of the flow channel, a first one-way valve in the flow channel, the first one-way valve comprising a first housing, a valve core, a second housing, and a first spring, the first housing being connected to the second housing, a first connecting hole being provided at one end of the first housing, one end of the first spring abutting against the second housing, and the other end pushing the valve core toward the first connecting hole until the valve core blocks the first connecting hole; a second connecting hole being provided on the side of the second housing, the second connecting hole communicating with the nozzle.

[0005] The present invention is further configured such that: an installation groove is formed between the nozzle and the flow channel, and the first one-way valve is disposed in the installation groove; a first connecting groove is provided on the inner wall of the nozzle, and a second connecting groove is provided at the front end of the second housing; the second connecting hole, the first connecting groove, the second connecting groove, and the spray hole provided at the center of the nozzle are sequentially connected.

[0006] A further feature of this invention is that a groove is provided at the center of the second housing, and the valve core slides in the groove.

[0007] The present invention is further configured such that: a conical end cap is provided at the end of the valve core facing the first connecting hole, and the end cap blocks the first connecting hole.

[0008] The present invention is further configured such that: a plurality of retaining strips are provided on the inner wall of the mounting groove, and a plurality of retaining slots are provided on the second housing, the retaining slots matching the retaining strips.

[0009] The present invention is further configured such that: a second one-way valve is provided in the flow channel, and a pump body is provided between the second one-way valve and the first one-way valve. The pump body includes a pump tube, a piston, and a second spring. The pump tube is fixedly connected to the side of the main body, and a third connecting hole is provided between the pump tube and the flow channel. A chamber is formed between the piston and the rear section of the pump tube. The piston slides back and forth in the chamber, and the second spring is provided between the bottom of the valve core and the piston.

[0010] The present invention is further configured such that: the main body includes a horizontal part and a vertical part connected to each other, and the pump pipe is connected to the vertical part; a nut is provided at the lower end of the vertical part, and a wrench is hinged on the horizontal part, and the middle part of the wrench is hinged to the piston through a connecting rod.

[0011] The present invention is further configured such that: a vent hole is provided on the nut, and a fourth connecting hole is provided on the front section of the pump pipe, and the vent hole is connected to the fourth connecting hole.

[0012] A further feature of this invention is that a straw is connected to the rear end of the flow channel.

[0013] Compared with existing technologies, the beneficial effects of this invention are: when the wrench is gripped, liquid is sprayed out. The pressure inside the chamber gradually decreases. When the pressure is lower than the elastic force of the first spring on the valve core, the valve core blocks the first connecting hole, cutting off the liquid sprayed at the end. This prevents the liquid sprayed at the end from forming large mist particles that could land on the user's hands and contaminate their fingers. As long as the pressure in the chamber is greater than the elastic force of the first spring, the same small-diameter mist particles can be sprayed out.

[0014] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a drip-proof high-pressure spray gun according to a preferred embodiment of the present invention; Figure 2 A structural diagram of the main body, the second spring, the piston, and the connecting rod; Figure 3 This is a schematic diagram of the structure of the first check valve; Figure 4This is a schematic diagram of the second housing. In the diagram: 1. Main body; 2. Nut; 3. Suction tube; 4. Second one-way valve; 5. Flow channel; 6. First one-way valve; 7. Nozzle; 8. Wrench; 9. Connecting rod; 10. Piston; 11. Second spring; 12. Third connecting hole; 13. Chamber; 14. Locking strip; 15. Locking groove; 16. Mounting groove; 17. Breathing hole; 18. First housing; 19. Valve core; 20. Second housing; 21. First spring; 22. First connecting hole; 23. Slide groove; 24. Second connecting hole; 25. First connecting groove; 26. Second connecting groove; 27. Spray hole; 28. Fourth connecting hole; 29. ​​Pump pipe. Detailed Implementation

[0016] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0017] See appendix Figure 1-4 As shown, a drip-proof high-pressure spray gun in this embodiment includes a main body 1, with a flow channel 5 inside the main body 1. A nozzle 7 is connected to the front end of the flow channel 5. A first one-way valve 6 is provided in the flow channel 5. The first one-way valve 6 includes a first housing 18, a valve core 19, a second housing 20, a first spring 21, a first connecting hole 22, and a second connecting hole 24. The first housing 18 is connected to the second housing 20. The first connecting hole 22 is located at one end of the first housing 18. One end of the first spring 21 abuts against the second housing 20, and the other end pushes the valve core 19 toward the first connecting hole 22 until the valve core 19 blocks the first connecting hole 22. The second connecting hole 24 is located on the side of the second housing 20 and communicates with the nozzle 7.

[0018] A mounting groove 16 is formed between the nozzle 7 and the flow channel 5, and the first one-way valve 6 is disposed in the mounting groove 16. A first connecting groove 25 is provided on the inner wall of the nozzle 7, and a second connecting groove 26 is provided at the front end of the second housing 20. The second connecting hole 24, the first connecting groove 25, the second connecting groove 26, and the spray hole 27 provided at the center of the nozzle 7 are sequentially connected. Finally, a mist of liquid is sprayed out from the spray hole 27. A sliding groove 23 is provided at the center of the second housing 20, and the valve core 19 slides in the sliding groove 23. A conical end cap is provided at the end of the valve core 19 facing the first connecting hole 22, and the end cap blocks the first connecting hole 22. A plurality of retaining strips 14 are provided on the inner wall of the mounting groove 16, and a plurality of retaining slots 15 are provided on the second housing 20, and the retaining slots 15 match the retaining strips 14. A second one-way valve 4 is also provided in the flow channel 5. A pump body is provided between the second one-way valve 4 and the first one-way valve 6. The pump body includes a pump tube 29, a piston 10, and a second spring 11. The pump tube 29 is fixedly connected to the side of the main body 1. A third connecting hole 12 is provided between the pump tube 29 and the flow channel 5. A chamber 13 is formed between the piston 10 and the rear section of the pump tube 29. The piston 10 slides back and forth in the chamber 13. The second spring 11 is provided between the bottom of the valve core 19 and the piston 10. The main body 1 includes a horizontal part and a vertical part that are connected to each other. The pump tube 29 is connected to the vertical part. A nut 2 is provided at the lower end of the vertical part. A wrench 8 is hinged on the horizontal part. The middle part of the wrench 8 is hinged to the piston 10 through a connecting rod 9. A breather hole 17 is provided on the nut 2. A fourth connecting hole 28 is provided on the front section of the pump tube 29. The breather hole 17 communicates with the fourth connecting hole 28. A suction tube 3 is connected to the rear end of the flow channel 5.

[0019] In summary, the method of using the anti-drip high-pressure spray gun shown in this utility model is as follows: The second spring 11 naturally expands, first forming a negative pressure in the chamber 13. The chamber 13 and the flow channel 5 are connected through the third connecting hole 12. A negative pressure is formed in the flow channel 5, the first one-way valve 6 closes, and the second one-way valve 4 opens. The liquid enters the flow channel 5 through the suction tube 3 and the second one-way valve 4. Then, pressing the wrench 8 drives the piston 10 to move via the connecting rod 9, compressing the second spring 11 and forming a positive pressure in the chamber 13. The first one-way valve 6 opens, and the second one-way valve 4 closes. The liquid is discharged sequentially through the flow channel 5, the first one-way valve 6, and the nozzle 7, forming small droplets. Specifically, the liquid in the first one-way valve 6 sequentially passes through the first connecting hole 22, the interior of the first housing 18 and the second housing 20, the second connecting hole 24, the first connecting groove 25, the second connecting groove 26, and the spray hole 27.

[0020] During the liquid ejection process, the pressure inside the chamber gradually decreases. When the pressure falls below the elastic force of the first spring 21 on the valve core 19, the valve core 19 blocks the first connecting hole 22, cutting off the liquid ejected at the end. This prevents the liquid ejected at the end from forming larger mist particles that could land on the user's hands and contaminate their fingers. As long as the pressure in the chamber is greater than the elastic force of the first spring 21, the same small-diameter mist particles can be ejected.

[0021] The slide 23 guides the valve core 19 so that it moves along a predetermined trajectory. The cylindrical end cap better seals the first connecting hole 22. The retaining groove 15 matches the retaining strip 14 to prevent the first one-way valve 6 from rotating on its own. The breather hole 17 communicates with the fourth connecting hole 28 to supply air to the container (not shown) and maintain the container at atmospheric pressure.

[0022] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A drip-proof high-pressure spray gun, comprising a main body (1), wherein the main body (1) has a flow channel (5) inside, and a nozzle (7) is connected to the front end of the flow channel (5), characterized in that, The flow channel (5) is provided with a first one-way valve (6). The first one-way valve (6) includes a first housing (18), a valve core (19), a second housing (20), and a first spring (21). The first housing (18) is connected to the second housing (20). One end of the first housing (18) is provided with a first connecting hole (22). One end of the first spring (21) abuts against the second housing (20), and the other end pushes the valve core (19) toward the first connecting hole (22) until the valve core (19) blocks the first connecting hole (22). The side of the second housing (20) is provided with a second connecting hole (24), which is connected to the nozzle (7).

2. The anti-drip high-pressure spray gun according to claim 1, characterized in that, An installation groove (16) is formed between the nozzle (7) and the flow channel (5), and the first one-way valve (6) is disposed in the installation groove (16); a first connecting groove (25) is provided on the inner wall of the nozzle (7), and a second connecting groove (26) is provided at the front end of the second housing (20); the second connecting hole (24), the first connecting groove (25), the second connecting groove (26), and the spray hole (27) provided at the center of the nozzle (7) are connected in sequence.

3. The anti-drip high-pressure spray gun according to claim 1, characterized in that, The second housing (20) has a groove (23) at its center, and the valve core (19) slides in the groove (23).

4. The anti-drip high-pressure spray gun according to claim 1, characterized in that, The valve core (19) has a conical end cap at the end facing the first connecting hole (22), which blocks the first connecting hole (22).

5. The anti-drip high-pressure spray gun according to claim 2, characterized in that, The inner wall of the mounting groove (16) is provided with several locking strips (14), and the second housing (20) is provided with several locking slots (15), which match the locking strips (14).

6. The anti-drip high-pressure spray gun according to claim 1, characterized in that, A second check valve (4) is also provided in the flow channel (5). A pump body is provided between the second check valve (4) and the first check valve (6). The pump body includes a pump pipe (29), a piston (10), and a second spring (11). The pump pipe (29) is fixedly connected to the side of the main body (1). A third connecting hole (12) is provided between the pump pipe (29) and the flow channel (5). The piston (10) and the rear section of the pump pipe (29) enclose a chamber (13). The piston (10) slides back and forth in the chamber (13). The second spring (11) is provided between the bottom of the valve core (19) and the piston (10).

7. The anti-drip high-pressure spray gun according to claim 6, characterized in that, The main body (1) includes a horizontal part and a vertical part connected to each other, and the pump pipe (29) is connected to the vertical part; a nut (2) is provided at the lower end of the vertical part, and a wrench (8) is hinged on the horizontal part. The middle part of the wrench (8) is hinged to the piston (10) through a connecting rod (9).

8. The anti-drip high-pressure spray gun according to claim 7, characterized in that, The nut (2) is provided with a vent (17), and the front section of the pump pipe (29) is provided with a fourth connecting hole (28), and the vent (17) is connected to the fourth connecting hole (28).

9. The anti-drip high-pressure spray gun according to claim 1, characterized in that, The rear end of the flow channel (5) is connected to a straw (3).

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