Water suction and spraying system for a lance

Abstract

The water suction and spraying system for spray gun comprises a water suction end, a pressure chamber, and a water outlet end, a one-way valve chamber is arranged between the pressure chamber and the water outlet end, a water suction hole is arranged in the side wall of the one-way valve chamber and communicates with the water suction end, a water outlet hole is arranged in the bottom and communicates with the water outlet end, a pressure inlet and outlet hole is further arranged in the bottom and communicates with the pressure chamber, a one-way valve sleeve is arranged in the one-way valve chamber, the bottom of the one-way valve sleeve covers the water outlet hole, and the flexible side of the one-way valve sleeve abuts against the wall of the one-way valve chamber between the water suction hole and the pressure inlet and outlet hole. The one-way valve chamber is arranged, the one-way valve sleeve is arranged in the one-way valve chamber, the flexible side of the one-way valve sleeve is arranged as a shield between the water suction hole and the pressure inlet and outlet hole, the one-way valve effect of the water suction hole connected to the water inlet end when the pressure chamber generates negative pressure to suck water can be realized, the negative pressure accumulation can be increased, and the negative pressure intensity is obvious. The liquid pressurizing and accelerating ring channel is formed between the bottom of the one-way valve sleeve and the one-way valve chamber, and the spraying effect of the liquid can reach another height.

Description

Technical Field

[0001] This invention relates to a water pumping and spraying system, specifically to a water pumping and spraying system for nozzles. Background Technology

[0002] A spray gun is a device that sprays liquid out by pressurizing it and controlling the spray through the handle.

[0003] Existing spray guns are divided into electric, pneumatic and manual types. Electric and pneumatic spray guns can provide higher pressure because the power source is not human. However, manual spray guns have very limited pressure on liquids due to their structure, especially since they use a pressure piston to pressurize and extract liquid from a kettle in a pressure chamber. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problem that the liquid sprayed by existing manual spray guns after pressurization has very limited pressure, and to provide a water pumping and spraying system for spray guns that is labor-saving to operate and has a very obvious pressurization effect.

[0005] The technical solution to the problem that this invention aims to solve is as follows:

[0006] A water-pumping and spraying system for a spray gun includes a pumping end, a pressurizing chamber communicating with the pumping end, and a water outlet end. The system is characterized by: a one-way valve chamber between the pressurizing chamber and the water outlet end; a pumping hole communicating with the pumping end on the side wall of the one-way valve chamber, a water outlet communicating with the water outlet end at the bottom, and a pressurizing inlet / outlet port communicating with the pressurizing chamber at the bottom; a one-way valve sleeve is placed inside the one-way valve chamber, the bottom of which covers the water outlet, and its flexible side abuts against the wall of the one-way valve chamber between the pumping hole and the bottom pressurizing inlet / outlet port.

[0007] Preferably, the bottom of the one-way valve chamber is provided with a partition above the pressurized inlet and outlet holes, dividing the space above the pressurized inlet and outlet holes into two areas; above the corresponding pressurized inlet and outlet holes, the bottom of the one-way valve sleeve is provided with a groove, and the groove is also provided with a cavity in the direction biased towards the center of the bottom of the one-way valve sleeve, and the outer wall of the groove is the flexible edge; when the bottom of the one-way valve sleeve covers the outlet hole, the groove covers the partition, so as to realize the connection between the two areas above the partition corresponding to the pressurized inlet and outlet holes.

[0008] Preferably, the wall of the water outlet protrudes at the bottom of the one-way valve chamber; corresponding to the protruding part, a base is provided on the outer side of the bottom of the one-way valve sleeve, and a pressure boosting hole is provided on the base.

[0009] Preferably, a top cup is provided inside the one-way valve sleeve, and a gap is left between the top cup and the bottom of the one-way valve sleeve.

[0010] The beneficial effects of this invention are as follows:

[0011] This invention establishes a one-way valve chamber between the pressurization chamber and the outlet pipe, and a one-way valve sleeve within the one-way valve chamber. The flexible edge of the one-way valve sleeve acts as a barrier between the suction port and the pressurization inlet port, achieving a one-way valve effect when the pressurization chamber generates negative pressure to pump water from the inlet end connected to the suction port. This allows for the accumulation and significant increase of negative pressure. Furthermore, by creating a liquid pressurization and acceleration loop between the bottom of the one-way valve sleeve and the one-way valve chamber, the liquid jetting effect can be further enhanced. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0013] Figure 1 This is a schematic diagram of the structure of the present invention;

[0014] Figure 2 This is a schematic cross-sectional view of the structure of the present invention;

[0015] Figure 3 This is an exploded view of the structure of the present invention. Detailed Implementation

[0016] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, that is, to provide numerous specific details in order to offer a more thorough understanding of the present invention. However, those skilled in the art will recognize that the present invention can be practiced without one or more of these details. In these examples, to avoid confusion with the present invention, some technical features well-known in the art have not been described.

[0017] It should be understood that the present invention can be implemented in different forms and should not be construed as being limited to the embodiments set forth herein. Therefore, these are merely examples and should not be used to limit the scope of protection of the present invention.

[0018] Additionally, it should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0019] See Figures 1 to 3 The existing water pumping and spraying system on a spray gun typically includes a pumping end, a pressurization chamber connected to the pumping end, and a water outlet. The pumping end uses a pumping pipe 1, and the water outlet uses a water outlet pipe 3, the end of which is connected to the nozzle of the spray head. The handle 6 of the spray gun is connected to the pressurization piston of the pressurization chamber 2.

[0020] The water pumping and spraying system of the present invention further includes a one-way valve chamber 4 between the pressurization chamber 2 and the outlet pipe 3; the side wall of the one-way valve chamber 4 is provided with a water pumping hole 41 communicating with the water pumping pipe 1, and the end of the water pumping pipe 1 extends into the water tank; the bottom of the one-way valve chamber 4 is provided with an outlet hole 42 communicating with the outlet pipe 3, and the bottom is also provided with a pressurization inlet and outlet hole 43 communicating with the pressurization chamber 2; a one-way valve sleeve 5 is placed in the one-way valve chamber 4, the bottom of the one-way valve sleeve 5 covers the outlet hole 42, and the flexible edge 44 on its side abuts against the wall of the one-way valve chamber 4 between the water pumping hole 41 and the bottom pressurization inlet and outlet hole 43.

[0021] During implementation, the gun handle 6 is first gripped and pressed down. The lifting rod 61 at the end of the gun handle 6 pushes the pressurizing piston 21 of the pressurizing chamber 2 to compress the space of the pressurizing chamber 2. The internal air is discharged from the pressurizing chamber 2 through the pressurizing inlet and outlet water holes 43. During this process, the air in the pressurizing chamber 2 enters the one-way valve chamber 4 through the pressurizing inlet and outlet water holes 43. First, the flexible edge 44 of the one-way valve sleeve 5 abuts between the water suction hole 41 and the bottom pressurizing inlet and outlet water holes 43. The air is blocked by the flexible edge 44 and cannot enter the area of ​​the water suction hole 41 on the upper wall of the one-way valve chamber 4. The air can only enter the gap between the one-way valve chamber 4 and the bottom of the one-way valve sleeve 5. At this time, the air pushes the one-way valve sleeve 5 up and then discharges into the water outlet pipe 3 from the water outlet hole 42.

[0022] When the grip 6 is released, the booster piston 21 returns to its original position under the action of the spring, generating negative pressure in the booster chamber 2. During this process, the space at the bottom of the one-way valve sleeve 5 in the one-way valve chamber 4 is limited, and the one-way valve sleeve 5 falls down to cover the water outlet 43. The pressure inside the kettle is the same as the pressure above the one-way valve chamber separated by the water pipe 1, the water outlet 41, and the flexible edge 44. However, the negative pressure in the booster chamber 2 is the same as the pressure in the one-way valve chamber below the flexible edge 44 through the booster water outlet 43. When the pressure above is greater than the pressure below plus the elastic force of the flexible edge 44, the flexible edge 44 folds inward, and the two spaces are connected. The water in the kettle enters the one-way valve chamber 4 through the water pipe 1 and the water outlet 41, and first enters the booster chamber 2. The rest will fill the one-way valve chamber 4.

[0023] When the gun handle 6 is pressed again, the water is pushed into the one-way valve chamber 4 through the pressurized inlet and outlet holes 43. At this time, the flexible edge 44 returns to its original position to isolate the water flow. The water flow lifts the one-way valve sleeve 5 and is compressed through the bottom gap. The water flow speed is high and it is discharged into the outlet pipe 3 through the outlet hole 42 under high pressure, and then sprayed out at high speed through the nozzle.

[0024] During the process, the handle 6 is pressed continuously, and the pressurization chamber 2 continuously generates negative pressure, continuously pumping water from the kettle connected to the water pipe 1, so that the water sprayed out through the water outlet pipe 3 forms a continuous spray state.

[0025] From an overall structural perspective, because the one-way valve sleeve 5 can dynamically adjust the size of the gap between the one-way valve sleeve 5 and the bottom as air or liquid enters and exits the pressurization chamber 2 within the one-way valve chamber 4, the negative pressure generated is greater and the water jet pressure is stronger.

[0026] In addition, during implementation, the one-way valve chamber 4 can be a cube, and the one-way valve sleeve 5 is configured to match the shape of the one-way valve chamber.

[0027] In this invention, the one-way valve chamber 4 is cup-shaped, and the one-way valve sleeve 5 is bowl-shaped.

[0028] Furthermore, as an improvement to the present invention, the one-way valve chamber 4 is provided with a partition 45 established on the pressurized inlet / outlet port 43, so that the space above the pressurized inlet / outlet port 43 is divided into two areas; above the corresponding pressurized inlet / outlet port 43, the bottom of the one-way valve sleeve 5 is provided with a groove 51, and the groove is also provided with a cavity 52 biased towards the center of the bottom of the one-way valve sleeve, and the outer groove wall of the groove 51 is the flexible edge 44; when the bottom of the one-way valve sleeve 5 covers the outlet port 42, the groove 51 covers the partition 45, so as to realize the connection between the two areas above the partition corresponding to the pressurized inlet / outlet port 43.

[0029] In implementation, the partition 45 divides the pressurized inlet and outlet water holes 43 into two parts, and is equipped with a groove 51 and a cavity 52 at the bottom of the groove 51. In terms of structure, in addition to making it easier to form a pressure difference between the upper and lower parts of the flexible edge 44 for rapid water pumping, it can also increase the pressure while the top one-way valve sleeve 5 is placed.

[0030] First, the flexible edge 44 serves as the outer wall of the groove 51. When water is forced out from the pressurization chamber 2 through the pressurization inlet / outlet hole 43, the channel on the outer side of the partition 45 exerts upward pressure on the flexible edge 44. The water flow is flushed along the bottom of the groove 51 to the inner side of the partition 45. At this time, the water flow on both sides of the partition merges and impacts the cavity 52 (of course, some of the water flow on the inner side of the partition will enter the outlet pipe 3 through the gap from the outlet hole 42), causing the one-way valve sleeve 5 to rise. At this time, the space between the groove 51 and the partition 45 is pressurized by the pressurization chamber 2. Under the reaction of the bottom of the one-way valve sleeve 5 on the water flow, the water flow is pressed to the outlet hole 42 at the bottom of the one-way valve sleeve 5 and discharged.

[0031] When the one-way valve chamber 4 is cup-shaped, the partition 45 is also annular, and the corresponding bottom groove 51 of the one-way valve sleeve 5 is also annular. The bottom gap of the one-way valve sleeve 5 remains unchanged, but the water flow to the outlet hole 43 in the middle part increases, and the water pressure gathered in the center is stronger.

[0032] Furthermore, as an improvement to the present invention, part of the hole wall 46 of the water outlet 42 protrudes at the bottom of the one-way valve chamber 4; corresponding to the protruding part, a base 53 is provided on the outer side of the bottom of the one-way valve sleeve 5, and a pressure boosting hole 54 is provided on the base 53.

[0033] In practice, the base 53 prevents the one-way valve sleeve 5 from being tightly pressed against the outlet hole 42 under air pressure, making it inconvenient to separate. The addition of the pressure boosting hole 54 allows the one-way valve sleeve 5 to be easily lifted off the outlet hole 42 when water flows into the bottom of the one-way valve chamber 4. The pressure boosting hole 54 also serves to limit flow and increase pressure.

[0034] Furthermore, as an improvement to the present invention, a top cup 6 is provided inside the one-way valve sleeve 5, and a gap is left between the top cup 6 and the bottom of the one-way valve sleeve 5.

[0035] During implementation, the top bowl 6 can buffer the instantaneous impact force on the one-way valve sleeve 5, preventing the bottom of the one-way valve sleeve 5 from rising too much, and causing the flexible edge 44 to fold inward, thus securing the one-way valve sleeve 5 to the wall of the one-way valve chamber 4. The top bowl 6 can push the one-way valve sleeve 5 back to its original position when it rises to a certain height. In addition, the top bowl 6 can prevent the one-way valve sleeve 5 from sticking to the top of the one-way valve chamber 4 due to air or water pressure from below.

[0036] Alternatively, in practice, the top bowl 6 can be replaced by a spring.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A water pumping and spraying system for a spray gun, comprising a pumping end, a pressurization chamber communicating with the pumping end, and a water outlet end, characterized in that: A one-way valve chamber is provided between the pressurization chamber and the outlet end; the one-way valve chamber has a water inlet on its side wall communicating with the water inlet end, and a water outlet at its bottom communicating with the water outlet end, and also has a pressurization inlet / outlet hole at its bottom communicating with the pressurization chamber; a one-way valve sleeve is placed inside the one-way valve chamber, the bottom of which covers the water outlet hole, and its flexible side abuts against the one-way valve chamber wall between the water inlet hole and the bottom pressurization inlet / outlet hole; The flexible edge is configured as a single structural component to achieve the following dynamic working process: When the pressurizing piston is compressed, the air in the pressurizing chamber enters the one-way valve chamber through the pressurizing inlet and outlet holes and is blocked by the flexible edge from the water pumping hole area, thereby lifting the one-way valve sleeve and discharging it from the outlet hole; when the pressurizing piston resets and generates negative pressure, the flexible edge folds inward under the action of the internal and external pressure difference, making the space where the water pumping hole and the pressurizing inlet and outlet holes are located instantaneously connected to achieve water pumping from the pumping end; when pressed again, the water flow lifts the one-way valve sleeve and sprays it out at high speed from the outlet hole; through this process, the negative pressure is accumulated and increased and continuous high-pressure injection is achieved.

2. The water pumping and spraying system for a spray gun according to claim 1, characterized in that: The bottom of the one-way valve chamber is provided with a partition above the pressurized inlet and outlet holes, dividing the space above the pressurized inlet and outlet holes into two areas. Above the corresponding pressurized inlet and outlet holes, the bottom of the one-way valve sleeve is provided with a groove, and the groove is also provided with a cavity in the direction of the center of the bottom of the one-way valve sleeve. The outer wall of the groove is the flexible edge. When the bottom of the one-way valve sleeve abuts against the outlet hole, the groove covers the partition, so as to realize the connection between the two areas above the partition corresponding to the pressurized inlet and outlet holes.

3. The water pumping and spraying system for a spray gun according to claim 1, characterized in that: The wall of the water outlet protrudes at the bottom of the one-way valve chamber; corresponding to the protruding part, a base is provided on the outer side of the bottom of the one-way valve sleeve, and a pressure boosting hole is provided on the base.

4. The water pumping and spraying system for a spray gun according to claim 1, characterized in that: A top cup is provided inside the one-way valve sleeve, and a gap is left between the top cup and the bottom of the one-way valve sleeve.

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