Liquid inlet one-way valve release device of airless sprayer

Abstract

The utility model discloses an airless sprayer liquid inlet one-way valve release device, which relates to the field of airless sprayers, and comprises a valve seat, a valve ball and a shell, one end of the shell is connected with a suction pipe as a suction port, the other end of the shell is used as a feeding port, the suction pipe compresses the valve seat on the inner wall of the shell, a valve ball moving cavity is arranged at the position of the shell close to the valve seat, and the valve ball moving cavity is communicated with the valve seat. A valve ball is arranged in the valve seat and abuts against the opening portion of the valve seat under the action of a valve ball spring to form a one-way valve leading from the material suction opening to the feeding opening, a release opening communicated with a valve ball moving cavity is formed in the side wall of the shell and used for installing a release threaded sleeve, and the release rod penetrates through the release threaded sleeve and axially slides along the inner wall of the release threaded sleeve. And the trigger rod extends into the valve ball moving cavity to trigger the valve ball. According to the utility model, the valve ball can be pushed by pressing the rod cover on the premise that the cover is not required to be opened, the machine is not required to be disassembled and the suction pipe is not required to be pulled out, so that the spraying machine can work normally.

Description

Technical Field

[0001] The utility model relates to the field of airless spraying machines, in particular to a one-way valve releasing device for a liquid inlet of an airless spraying machine. Background Art

[0002] An airless sprayer is a spraying device that uses a plunger pump to pressurize the paint, and the high-pressure paint is transported to the spray gun through a high-pressure hose, and the pressure is released through the nozzle to form atomization, thereby forming a dense coating on the wall surface. In the prior art, when the airless sprayer equipment is placed for a long time or used the next day, the one-way valve at the liquid inlet is not cleaned properly, which usually causes the paint to stick to the valve ball and valve seat of the one-way valve, causing the one-way valve to be blocked and the sprayer to be unable to absorb the material normally. In this case, the user can only open the lid, disassemble the machine or pull off the suction pipe, and poke it with an aluminum rod or other things to prevent the valve ball and valve seat on the one-way valve from sticking. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and to provide a one-way valve release device for the liquid inlet of an airless sprayer. The valve ball can be pushed by pressing the rod cover without opening the cover, disassembling the machine and pulling out the suction pipe, so that the sprayer can work normally.

[0004] The purpose of the utility model is achieved through the following technical solutions: this one-way valve release device for the liquid inlet of an airless sprayer comprises a valve seat, a valve ball and a shell, one end of the shell is connected to a suction pipe as a suction port, and the other end of the shell is used as a feeding port. The suction pipe presses the valve seat against the inner wall of the shell, and a valve ball movable cavity is arranged near the valve seat of the shell, and a valve ball is placed in the shell. The valve ball presses against the mouth of the valve seat under the action of a valve ball spring to form a one-way valve from the suction port to the feeding port, and also comprises a release rod, a release port connected to the valve ball movable cavity is arranged on the side wall of the shell for installing a release screw sleeve, the release rod penetrates the release screw sleeve, and slides axially along the inner wall of the release screw sleeve, and is used to extend into the valve ball movable cavity to touch the valve ball.

[0005] As a further technical solution, the release screw sleeve presses the gasket against the inner wall of the shell, a flange is set on the outer wall of the release rod, a release rod spring is set between the rear end face of the flange and the gasket, and the front end face of the flange cooperates with the inner wall of the release screw sleeve, thereby limiting the rebound stroke of the release rod.

[0006] As a further technical solution, a sealing ring is tightly arranged between the inner side of the gasket and the inner wall of the shell, and the release rod penetrates the sealing ring and slides relative to the sealing ring for sealing.

[0007] As a further technical solution, the release rod passes through the housing of the airless sprayer and then a rod cover is installed so that the rod cover is exposed from the housing of the airless sprayer.

[0008] As a further technical solution, the sliding direction of the release rod is perpendicular to the up and down movement direction of the valve ball.

[0009] The beneficial effects of the utility model are:

[0010] 1. An additional channel is opened on the housing of the one-way valve, and a release rod is installed. By pressing (pushing) the release rod, the valve ball can be poked to separate the valve ball from the valve seat. There is no need to open the cover, disassemble the machine, or pull out the suction pipe, which improves the spraying efficiency.

[0011] 2. A spring is set on the release lever, which can automatically rebound after being pressed, making it convenient and labor-saving to press;

[0012] 3. A sealing ring is installed on the release rod to prevent paint leakage. At the same time, the sealing ring is pressed by a gasket to prevent it from moving up and down;

[0013] 4. The rod cover is exposed from the airless sprayer shell, which is convenient for direct pressing and pushing when in use, without the need for other tools, which is fast and efficient;

[0014] 5. The sliding direction of the release rod is perpendicular to the up and down movement direction of the valve ball. When the valve ball is poked, the valve ball can be quickly removed from the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the airless sprayer in the utility model.

[0016] Figure 2 for Figure 1 AA section view.

[0017] Figure 3 It is a structural schematic diagram of the one-way valve in the utility model.

[0018] Figure 4 for Figure 3 BB cross-sectional view.

[0019] Figure 5 for Figure 4 A partial enlarged schematic diagram of the C area in the middle.

[0020] Explanation of the accompanying drawings: rod cover 1, release rod 2, release screw sleeve 3, gasket 4, release rod spring 5, sealing ring 6, valve seat 7, valve ball 8, valve ball spring 9, coating material 10, shell 11, suction pipe 12, suction port 14, feed port 15, release port 16, valve ball movable cavity 17, flange 18, flange front end face 19, flange rear end face 20, airless sprayer housing 21. DETAILED DESCRIPTION

[0021] The utility model will be described in detail below with reference to the accompanying drawings:

[0022] Example: As shown in the attached Figures 1 to 5 As shown, the one-way valve release device for the liquid inlet of an airless sprayer includes a rod cover 1, a release rod 2, a release screw sleeve 3, a gasket 4, a release rod spring 5, a sealing ring 6, a valve seat 7, a valve ball 8, a valve ball spring 9, a coating material 10, a shell 11, a suction pipe 12, a suction port 14, a feed port 15, a release port 16, a valve ball movable cavity 17, a flange 18, a flange front end surface 19, a flange rear end surface 20, and an airless sprayer shell 21.

[0023] Reference Figure 2 , 4 One end of the housing 11 of the one-way valve is connected to the suction pipe 12 as the suction port 14, and the other end of the housing 11 is used as the feeding port 15. The paint 10 is sucked into the one-way valve from the suction pipe 12. After the suction pipe 12 is threadedly connected to the housing 11, the valve seat 7 is pressed against the inner wall of the housing 11. A valve ball activity cavity 17 is set near the valve seat 7 in the housing 11, and a valve ball 8 is placed. The valve ball 8 presses against the mouth of the valve seat 7 under the action of the valve ball spring 9, forming a one-way valve channel from the suction port 14 to the feeding port 15, that is, the paint 10 can only flow from the suction port 14 to the feeding port 15, and the reverse direction is not allowed.

[0024] like Figure 4 , 5 As shown, a release port 16 connected to the valve ball activity chamber 17 is provided on the side wall of the housing 11, and a release screw sleeve 3 is threadedly connected to the release port 16. After the release rod 2 penetrates the release screw sleeve 3, it slides axially along the inner wall of the release screw sleeve 3 so as to extend into the valve ball activity chamber 17 to touch the valve ball 8. Further, the release screw sleeve 3 presses the gasket 4 against the inner wall of the housing 11, and a flange 18 is provided on the outer wall of the release rod 2. A release rod spring 5 is provided between the rear end face 20 of the flange and the gasket 4. The release rod 2 can automatically rebound under the action of the spring 5, which is convenient for fast and multiple pressing. The front end face 19 of the flange cooperates with the inner wall of the release screw sleeve 3, thereby limiting the rebound stroke of the release rod 2 and preventing the release rod 2 from excessively rebounding and disengaging from the release screw sleeve 3. Preferably, a sealing ring 6 is provided between the inner side of the gasket 4 and the inner wall of the housing 11, and the sealing ring 6 is pressed by the gasket 4 to prevent the sealing ring 6 from moving up and down. After the release rod 2 penetrates the sealing ring 6, it slides and seals relative to the sealing ring 6 to prevent the coating 10 from leaking. Preferably, the sliding direction of the release rod 2 is perpendicular to the direction of the up-and-down movement of the valve ball 8 , so that when the release rod 2 pokes the valve ball 8 , the valve ball 8 can be quickly dropped from the valve seat 7 .

[0025] like Figure 1 , 2 As shown, the release rod 2 passes through the airless sprayer housing 21 and then the rod cover 1 is installed so that the rod cover 1 is exposed from the airless sprayer housing 21. Without opening the cover, disassembling the machine, and pulling out the suction tube, the valve ball can be pushed by only pressing the rod cover 1, so that the sprayer can work normally.

[0026] The working process of this utility model:

[0027] When the paint of the spray machine sticks to the one-way valve of the liquid inlet (that is, the paint 10 sticks to the valve ball 8 and the valve seat 7, causing blockage), the rod cover 1 on the release rod 2 is pressed. After the fixation of the release screw sleeve 3 and the compression of the spring 5, the release rod 2 moves in the pressing direction to push the valve ball 8 stuck to the valve seat 7. At this time, if no force is applied to the rod cover 1 on the release rod 2, the spring 5 will rebound and reset. Repeat the pressing several times until the machine can be used normally.

[0028] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and the concept of the utility model should fall within the protection scope of the claims attached to the utility model.

Claims

1. A one-way valve release device for a liquid inlet of an airless sprayer, comprising a valve seat (7), a valve ball (8) and a housing (11), one end of the housing (11) being connected to a suction pipe (12) as a suction port (14), and the other end of the housing (11) being a feeding port (15), the suction pipe (12) pressing the valve seat (7) against the inner wall of the housing (11), a valve ball activity cavity (17) being arranged near the valve seat (7) of the housing (11), and the valve ball (8) being placed therein, the valve ball (8) being pressed against the mouth of the valve seat (7) under the action of a valve ball spring (9), thereby forming a one-way valve from the suction port (14) to the feeding port (15), characterized in that: The invention also comprises a release rod (2). A release port (16) communicating with the valve ball movable chamber (17) is provided on the side wall of the housing (11) for installing a release screw sleeve (3). The release rod (2) penetrates the release screw sleeve (3) and slides axially along the inner wall of the release screw sleeve (3) so as to extend into the valve ball movable chamber (17) and actuate the valve ball (8).

2. The one-way valve release device for the liquid inlet of an airless sprayer according to claim 1, characterized in that: The release screw sleeve (3) presses the gasket (4) against the inner wall of the housing (11); a flange (18) is arranged on the outer wall of the release rod (2); a release rod spring (5) is arranged between the rear end surface (20) of the flange and the gasket (4); and the front end surface (19) of the flange cooperates with the inner wall of the release screw sleeve (3), thereby limiting the rebound stroke of the release rod (2).

3. The one-way valve release device for the liquid inlet of an airless sprayer according to claim 2, characterized in that: A sealing ring (6) is tightly arranged between the inner side of the gasket (4) and the inner wall of the housing (11), and the release rod (2) penetrates the sealing ring (6) and then slides relative to the sealing ring (6) to seal.

4. The one-way valve release device for the liquid inlet of an airless sprayer according to claim 1, characterized in that: The release rod (2) penetrates the airless sprayer housing (21) and then the rod cover (1) is installed, so that the rod cover (1) is exposed from the airless sprayer housing (21).

5. The one-way valve release device for the liquid inlet of an airless sprayer according to claim 1, characterized in that: The sliding direction of the release rod (2) is perpendicular to the up and down movement direction of the valve ball (8).

Images