Vacuum release valve

Abstract

The utility model relates to a kind of vacuum release valves, setting valve body;Valve body two end surfaces are respectively set up intercommunication valve body hole and air outlet hole;Valve body hole is equipped with valve core;Valve core upper part plugs valve body hole, and lower part is formed with the second chamber between valve body hole inner wall;Valve core two end surfaces are respectively set up valve core hole and piston hole;Valve core outer wall located in the second chamber is respectively set up with first connecting hole and second connecting hole;First connecting hole is communicated with valve core hole;Second connecting hole is communicated with piston hole;Piston hole is slidably set piston;Piston is composed of sliding part and push part;Sliding part is located above second connecting hole;Piston and piston hole bottom wall are equipped with spring;The area of push part bottom surface is greater than air outlet hole orifice area, under the spring elastic pressure, push part plugs air outlet hole, or push part is separated from air outlet hole under the action of positive pressure air, open air outlet hole.The utility model has the advantages of high airtightness, no negative pressure gas leakage, improve the stability of suction cup etc..

Description

Technical Field

[0001] This utility model relates to the field of vacuum suction cup technology, specifically to a vacuum release valve. Background Technology

[0002] Vacuum suction cups are widely used in industrial production due to their ability to quickly pick up and release items, and are mainly used in material handling devices.

[0003] Release of items is typically achieved using positive air pressure. This positive air pressure is usually controlled by a solenoid valve mounted on the suction cup, which controls the on / off flow of the positive air. However, in practical applications, it has been found that when using negative pressure to suction items, the suction force can cause gas leakage in the solenoid valve, especially under high-flow negative pressure conditions. This leakage is more pronounced, affecting the stability and performance of the vacuum suction cup. Utility Model Content

[0004] Therefore, this utility model provides a vacuum release valve, which mainly solves the technical problem that gas leakage occurs in the electromagnetic valve for controlling positive pressure air in the existing vacuum suction cup, affecting the stability and working effect of the vacuum suction cup.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A vacuum release valve includes a valve body; a valve body hole is formed on the top surface of the valve body, and an air outlet hole communicating with the valve body hole is formed on the bottom surface; the diameter of the valve body hole is larger than the diameter of the air outlet hole; a valve core is provided inside the valve body hole; the bottom surface of the valve core is tangent to the bottom surface of the valve body hole; the upper part of the valve core blocks the valve body hole, and the lower part forms a sealed second chamber with the inner wall of the valve body hole; a blind valve core hole is formed on the top surface of the valve core, and a blind piston hole is formed on the bottom surface; the diameter of the piston hole is larger than the diameter of the air outlet hole; a first connecting hole and a second connecting hole are respectively formed on the outer wall of the valve core located in the second chamber. The valve has two connection holes: a first connection hole and a second connection hole; a piston is slidably disposed within the piston hole; the piston consists of a sliding part and a pushing part; the sliding part is located above the second connection hole; a spring is provided between the piston and the bottom wall of the piston hole; the bottom surface area of ​​the pushing part is larger than the opening area of ​​the air outlet, and under the spring pressure, the bottom surface of the pushing part and the top surface of the air outlet are in contact to block the air outlet, or the pushing part is disengaged from the top surface of the air outlet under the action of positive pressure air to open the air outlet.

[0007] Preferably, the sliding part is cylindrical and its diameter is adapted to the diameter of the piston hole; the pushing part is conical and its bottom diameter is larger than the diameter of the air outlet hole.

[0008] Preferably, the upper outer wall of the valve core is provided with an annular groove; the groove and the inner wall of the valve body hole form a sealed first chamber; the bottom wall of the piston hole is provided with a third connecting hole; the bottom of the third connecting hole is located in the groove; the outer wall of the valve body is provided with a balancing air pressure hole; the balancing air pressure hole communicates with the first chamber.

[0009] Preferably, a sealing gasket is provided between the bottom surface of the valve body hole and the bottom surface of the valve core; a through sealing gasket hole is opened on the top surface of the sealing gasket; the diameter of the sealing gasket hole is smaller than the bottom diameter of the push part.

[0010] Preferably, the diameter of the sealing gasket hole is larger than the diameter of the air outlet hole.

[0011] Preferably, a sealing ring is provided between the upper outer wall of the valve core and the inner wall of the valve body hole.

[0012] Preferably, a plug is provided in the valve body hole above the valve core; the bottom surface of the plug is in contact with the top surface of the valve core; and a through plug hole is provided on the top surface of the plug.

[0013] Preferably, the top surface of the plug and the valve body hole above it form an air inlet.

[0014] Preferably, the piston has a placement hole on its top surface; the lower part of the spring is placed in the placement hole.

[0015] This utility model has at least the following beneficial effects:

[0016] The valve body has a valve body hole on its top surface and an air outlet hole on its bottom surface that communicates with the valve body hole. A valve core is installed inside the valve body hole. The upper part of the valve core blocks the valve body hole, and the lower part forms a second chamber with the inner wall of the valve body hole. A blind valve core hole is opened on the top surface of the valve core, and a blind piston hole is opened on the bottom surface. The diameter of the piston hole is larger than the diameter of the air outlet hole. A first connecting hole and a second connecting hole are respectively opened on the outer wall of the valve core located in the second chamber. The first connecting hole communicates with the valve core hole, and the bottom of the second connecting hole communicates with the piston hole. A piston is slidably installed inside the piston hole. The piston consists of a sliding part and a pushing part. The sliding part is located above the second connecting hole. A spring is installed between the piston and the bottom wall of the piston hole. The bottom surface area of ​​the pushing part is larger than the opening area of ​​the air outlet hole. Under the spring pressure, the bottom surface of the pushing part and the top surface of the air outlet hole are in contact to block the air outlet hole, or the pushing part is disengaged from the top surface of the air outlet hole under the action of positive pressure air to open the air outlet hole. In this way, when the vacuum suction cup adsorbs an item, the positive pressure air is cut off. Under the action of the spring, the piston is pressed against the air outlet, and the negative pressure adsorbs the piston through the air outlet, further increasing the downward pressure of the piston. The air outlet is blocked, cutting off the leakage channel of the negative pressure and effectively preventing gas leakage. When releasing the item, the positive pressure air is turned on. The positive pressure air enters the second chamber through the valve core hole and the first connection hole, and then enters the piston hole through the second connection hole, pushing the pushing part. The pushing part causes the piston to move upward, the piston separates from the air outlet, the air outlet opens, the positive pressure air flows out, and the item is released quickly.

[0017] Therefore, the vacuum release valve of this utility model has the advantages of high sealing degree, no negative pressure gas leakage, and improved stability of vacuum suction cup. Attached Figure Description

[0018] To more clearly illustrate the prior art and the present invention, the accompanying drawings used in the description of the prior art and the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other drawings from the provided drawings without any creative effort.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which this utility model can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0020] Figure 1 This is a schematic diagram of the structure of a vacuum release valve according to the present invention;

[0021] Figure 2 This utility model provides an accessory for a vacuum release valve. Figure 1 A diagram showing the upward viewing direction;

[0022] Figure 3 This is a top view of a vacuum release valve according to the present invention;

[0023] Figure 4 This utility model provides an accessory for a vacuum release valve. Figure 4 Sectional view along axis AA;

[0024] Figure 5 This is a BB-direction sectional view of a vacuum release valve according to the present invention;

[0025] Figure 6 This is a schematic diagram of the valve core of a vacuum release valve according to the present invention;

[0026] Figure 7 This utility model provides an accessory for a vacuum release valve. Figure 6 A diagram showing the upward viewing direction;

[0027] Figure 8 This is a top view of the valve core of a vacuum release valve according to the present invention;

[0028] Figure 9 This utility model provides an accessory for a vacuum release valve. Figure 8 CC-direction sectional view;

[0029] Figure 10 This utility model provides an accessory for a vacuum release valve. Figure 8 DD section view;

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Valve body; 101. Valve body hole; 102. Air inlet; 103. Air outlet; 104. Balance air pressure hole; 2. Valve core; 201. Valve core hole; 202. Piston hole; 203. First connecting hole; 204. Groove; 205. Second connecting hole; 206. Third connecting hole; 3. First chamber; 4. Second chamber; 5. Piston; 501. Sliding part; 502. Pushing part; 6. Spring; 7. Plug; 701. Plug hole; 8. Sealing gasket; 801. Sealing gasket hole; 9. Sealing ring. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "comprising," "including," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0034] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to facilitate intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationships in the actual product. Changes in these relative positional relationships, without departing from the technical concept disclosed in this application, should also be considered within the scope of this application.

[0035] This utility model provides a vacuum release valve, such as Figures 1 to 10As shown, a valve body 1 is provided, with a valve body hole 101 on the top surface and an air outlet 103 communicating with the valve body hole 101 on the bottom surface. The diameter of the valve body hole 101 is larger than the diameter of the air outlet 103. A valve core 2 is provided inside the valve body hole 101, with the bottom surface of the valve core 2 fitting into the bottom surface of the valve body hole 101. The upper part of the valve core 2 blocks the valve body hole 101, and the lower part forms a sealed second chamber 4 between itself and the inner wall of the valve body hole 101. Specifically, the lower diameter of the valve core 2 can be smaller than the upper diameter, or the lower diameter of the valve body hole 101 can be larger than the upper diameter, or a combination of the two methods can be used. A blind valve core hole 201 is provided on the top surface of the valve core 2, and a blind piston hole 202 is provided on the bottom surface. The diameter of the piston hole 202 is larger than the diameter of the air outlet 103. The outer wall of the valve core 2 located in the second chamber 4 is provided with a first connecting hole 203 and a second connecting hole 205. The first connecting hole 203 communicates with the valve core hole 201, and the second connecting hole 205 communicates with the piston hole 202. Specifically, the bottom of the first connecting hole 203 can be opened on the wall of the valve core hole 201, and the bottom of the second connecting hole 205 can be opened on the wall of the piston hole 202. There can be multiple first connecting holes 203 and second connecting holes 205, evenly distributed in the radial direction of the valve core 2. A piston 5 is slidably installed in the piston hole 202. The piston 5 is made of rubber material, which allows it to slide on the piston hole 202 and also has a sealing effect. This is a technology well known to those skilled in the art, such as the piston used in syringes, and will not be elaborated here. The piston 5 consists of a sliding part 501 and a pushing part 502. The sliding part 501 is located above the second connecting hole 205 and is slidably disposed within the piston hole 202. The bottom surface area of ​​the pushing part 502 is larger than the orifice area of ​​the air outlet 103. The pushing part 502 receives the pressure of positive air, causing the sliding part 501 to slide upward within the piston hole 202. Preferably, the sliding part 501 is designed as a cylinder with a diameter adapted to the diameter of the piston hole 202, and the pushing part 502 is designed as a cone with a bottom diameter larger than the diameter of the air outlet 103. Under the pressure of positive air, the cone-shaped pushing part 502 pushes the sliding part 501 upward together. A spring 6 is provided between the piston 5 and the bottom wall of the piston hole 202. In this way, under the pressure of the spring 6, the bottom surface of the pushing part 502 and the top surface of the air outlet 103 are engaged, blocking the air outlet 103, releasing the item, and when positive pressure air is introduced, the pushing part 502 is disengaged from the top surface of the air outlet 103 under the action of the positive pressure air, opening the air outlet 103.

[0036] Preferably, since the top surface of piston 5 and the bottom wall of piston hole 202 form a sealed chamber, to prevent the gas in this chamber from affecting the movement of piston 5 during movement, an annular groove 204 is provided on the upper outer wall of valve core 2. The groove 204 and the inner wall of valve body hole 101 form a sealed first chamber 3. A third connecting hole 206 is provided on the bottom wall of piston hole 202, and the bottom of the third connecting hole 206 is located in the groove 204. A balancing air pressure hole 104 is provided on the outer wall of valve body 1, and the bottom of the balancing air pressure hole 104 communicates with the first chamber 3. In this way, when piston 5 moves, the air pressure in piston hole 202 at its upper part is balanced with the external air pressure, and will not interfere with the movement of piston 5.

[0037] Preferably, in order to improve the airtightness of the release valve of this application, a sealing gasket 8 is provided between the bottom surface of the valve body hole 101 and the bottom surface of the valve core 2. The sealing gasket 8 has a through sealing gasket hole 801. The diameter of the sealing gasket hole 801 is smaller than the bottom diameter of the push part 502. The sealing gasket hole 801 is located directly below the push part 502. The push part 502 can block or open the sealing gasket hole 801.

[0038] Preferably, in order to provide good support for the sealing gasket 8 to the bottom of the valve body hole 101, the diameter of the sealing gasket hole 801 is larger than the diameter of the air outlet hole 103.

[0039] Preferably, in order to further improve the airtightness of the valve core 2 in blocking the valve body hole 101, a sealing ring 9 is provided between the upper outer wall of the valve core 2 and the inner wall of the valve body hole 101.

[0040] Preferably, in order to facilitate fixing the valve core 2 inside the valve body hole 101, a plug 7 is provided in the valve body hole 101 above the valve core 2. The plug 7 is threaded to the inner wall of the valve body hole 101, the bottom surface of the plug 7 is in contact with the top surface of the valve core 2, and a through plug hole 701 is provided on the top surface of the plug 7.

[0041] Preferably, to facilitate the use and installation of the release valve of this application, the top surface of the plug 7 and the valve body hole 101 above it form an air inlet 102.

[0042] Preferably, to improve the stability of the spring 6 during compression and relaxation, a placement hole is provided on the top surface of the piston 5, and the lower part of the spring 6 is placed in the placement hole.

[0043] The working principle of this application is as follows:

[0044] When adsorbing items, the positive pressure air is cut off. Under the action of the spring, the piston is pressed on the sealing gasket hole, and the negative pressure is adsorbed on the piston through the air outlet, which further increases the downward pressure of the piston. The air outlet is blocked, cutting off the leakage channel of the negative pressure.

[0045] When releasing the item, positive pressure air is connected. The positive pressure air enters the second chamber through the air inlet and valve core hole, and then enters the piston hole through the first connection hole. The piston is pushed by the pusher, which causes the piston to move upward. The piston separates from the sealing gasket hole, the air outlet opens, and the positive pressure air flows out.

[0046] The present application has been described in a relatively specific and detailed manner above through general descriptions and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.

Claims

1. A vacuum release valve, characterized in that, The system includes a valve body (1); the valve body (1) has a valve body hole (101) on its top surface and an air outlet (103) communicating with the valve body hole (101) on its bottom surface; the diameter of the valve body hole (101) is larger than the diameter of the air outlet (103); a valve core (2) is provided inside the valve body hole (101); the bottom surface of the valve core (2) is in contact with the bottom surface of the valve body hole (101); the upper part of the valve core (2) encloses the valve body hole (101). The valve core (2) is blocked, forming a sealed second chamber (4) between its lower part and the inner wall of the valve body hole (101); a blind valve core hole (201) is opened on the top surface of the valve core (2), and a blind piston hole (202) is opened on the bottom surface; the diameter of the piston hole (202) is larger than the diameter of the air outlet hole (103); a first connecting hole (203) and a second connecting hole (205) are respectively opened on the outer wall of the valve core (2) located in the second chamber (4); the first connecting hole (203) and the ...01). A connecting hole (203) is connected to the valve core hole (201); a second connecting hole (205) is connected to the piston hole (202); a piston (5) is slidably disposed in the piston hole (202); the piston (5) is composed of a sliding part (501) and a pushing part (502); the sliding part (501) is located above the second connecting hole (205); a spring (6) is provided between the piston (5) and the bottom wall of the piston hole (202); the bottom surface area of ​​the pushing part (502) is larger than the orifice area of ​​the air outlet (103). Under the spring (6) pressure, the bottom surface of the pushing part (502) and the top surface of the air outlet (103) are engaged to block the air outlet (103), or the pushing part (502) is disengaged from the top surface of the air outlet (103) under the action of positive pressure air to open the air outlet (103).

2. A vacuum release valve according to claim 1, characterized in that, The sliding part (501) is cylindrical and its diameter is adapted to the diameter of the piston hole (202); the pushing part (502) is conical and its bottom diameter is larger than the diameter of the air outlet (103).

3. A vacuum release valve according to claim 2, characterized in that, The upper outer wall of the valve core (2) is provided with an annular groove (204); the groove (204) and the inner wall of the valve body hole (101) form a sealed first chamber (3); the bottom wall of the piston hole (202) is provided with a third connecting hole (206); the bottom of the third connecting hole (206) is located in the groove (204); the outer wall of the valve body (1) is provided with a balancing air pressure hole (104); the balancing air pressure hole (104) is connected to the first chamber (3).

4. A vacuum release valve according to claim 3, characterized in that, A sealing gasket (8) is provided between the bottom surface of the valve body hole (101) and the bottom surface of the valve core (2); a through sealing gasket hole (801) is provided on the top surface of the sealing gasket (8); the diameter of the sealing gasket hole (801) is smaller than the bottom diameter of the push part (502).

5. A vacuum release valve according to claim 4, characterized in that, The diameter of the sealing gasket hole (801) is larger than the diameter of the vent hole (103).

6. A vacuum release valve according to claim 2, characterized in that, A sealing ring (9) is provided between the upper outer wall of the valve core (2) and the inner wall of the valve body hole (101).

7. A vacuum release valve according to claim 6, characterized in that, A plug (7) is provided in the valve body hole (101) above the valve core (2); the bottom surface of the plug (7) is in contact with the top surface of the valve core (2); a through plug hole (701) is provided on the top surface of the plug (7).

8. A vacuum release valve according to claim 7, characterized in that, The top surface of the plug (7) and the valve body hole (101) above it form an air inlet (102).

9. A vacuum release valve according to claim 2, characterized in that, The piston (5) has a placement hole on its top surface; the lower part of the spring (6) is placed in the placement hole.

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