A quick exhaust valve and valve body

Abstract

The present invention relates to the technical field of exhaust valves, and more particularly to a quick exhaust valve and valve body. A valve body comprises a valve seat, a valve cover and a diaphragm located between the valve seat and the valve cover, the valve seat is formed with an abutment rod, the middle part of the abutment rod is formed with a first through hole that penetrates the valve seat, the side of the valve seat is formed with a second through hole that penetrates the valve seat, an exhaust hole is formed on the valve cover, the upper surface of the valve seat is formed with a lower positioning groove, the lower surface of the valve cover is formed with an upper positioning groove, and the upper and lower surfaces of the diaphragm are formed with positioning protrusions that fit with the inner side walls of the upper and lower positioning grooves. The assembler does not need to align carefully, so it is not easy to deviate during installation, so that the diaphragm achieves a better sealing effect. At the same time, the positioning protrusion and the upper and lower positioning grooves form a second gradient sealing surface outside the extrusion sealing surface of the diaphragm, the valve seat and the valve cover, achieving a better sealing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of exhaust valves, and in particular to a quick exhaust valve and a valve body. Background Art

[0002] The quick exhaust valve is an important component in pneumatic control, a one-way directional control component. It is usually placed between the cylinder and the control valve, so that the gas in the cylinder is discharged directly from this valve without passing through the control valve.

[0003] The existing utility model patent with authorization announcement number CN208858988U discloses a quick exhaust valve, which achieves a sealing effect by forming a sealing surface through the elastic sealing core and the inner wall of the valve body.

[0004] The elastomer sealing core of this type of quick exhaust valve will not be able to achieve the sealing effect due to continuous wear during use, causing the quick exhaust valve to fail quickly. Therefore, the current quick exhaust valve uses a diaphragm to replace the elastomer sealing core, and the diaphragm is clamped and fixed between the valve seat and the valve cover. When the middle part of the diaphragm moves down and abuts against the port, it plays a sealing role. When the middle part of the diaphragm moves up and leaves the port, the compressed air is quickly discharged. The diaphragm will not wear quickly in this process and has a long service life. When the diaphragm is fixed between the valve seat and the valve cover, the matching position of the diaphragm, the valve seat and the valve cover needs to be adjusted to perfectly align with the designed position. However, during the installation process, the assembler is prone to carelessness, causing the diaphragm position to shift, and the diaphragm is pressed by the valve seat and the valve cover. The surface is smaller than the design surface, and a good sealing effect cannot be achieved. Summary of the invention

[0005] One of the objects of the present invention is to provide a valve body, which has the advantage of providing a better seal when the diaphragm cooperates with the valve seat and the valve cover.

[0006] The above-mentioned inventive object of the present invention is achieved through the following technical scheme: a valve body, comprising a valve seat, a valve cover and a diaphragm located between the valve seat and the valve cover, the valve seat is formed with an abutment rod, the middle part of the abutment rod is formed with a first through hole penetrating the valve seat, the side of the valve seat is formed with a second through hole penetrating the valve seat, an exhaust hole is formed on the valve cover, the upper surface of the valve seat is formed with a lower positioning groove, the lower surface of the valve cover is formed with an upper positioning groove, and the upper and lower surfaces of the diaphragm are formed with positioning protrusions that fit with the inner walls of the upper and lower positioning grooves.

[0007] By adopting the above technical solution, the positioning protrusion cooperates with the upper positioning groove and the lower positioning groove so that the diaphragm can be positioned by the step structure when it is installed between the upper positioning groove and the lower positioning groove, without the need for the assembler to align carefully. Therefore, it is not easy to deviate during installation, so that the diaphragm achieves a better sealing effect. At the same time, the positioning protrusion and the upper positioning groove and the lower positioning groove form a second gradient sealing surface in addition to the extrusion sealing surface between the diaphragm and the valve seat and the valve cover, achieving a better sealing effect. At the same time, the assembler can also assemble quickly.

[0008] The present invention is further configured as follows: four lower fixing seats are evenly distributed along the circumferential direction on the outer wall of the valve seat near the valve seat port, and a penetrating lower fixing screw hole is formed on the upper surface of each lower fixing seat; four fixing rubber sheets are formed on a circumferential circle of the diaphragm, and a middle fixing hole is formed on each fixing rubber sheet; four upper fixing seats are evenly distributed on a circumferential circle of the valve cover, and a penetrating upper fixing hole is formed on the lower surface of each upper fixing seat, and the bolts pass through the upper fixing holes and the middle fixing holes and are connected to the lower fixing screw holes.

[0009] By adopting the above technical solution, a clamping force is formed by bolts passing through the upper fixing hole, the middle fixing hole and connecting with the lower fixing screw hole, so that the diaphragm is tightly pressed by the valve seat and the valve cover to form a sealing surface.

[0010] The present invention is further configured as follows: the lower fixed seat includes three basic lower fixed seats and one vent type lower fixed seat, the upper surface of the vent type lower fixed seat is formed with a non-through lower air vent hole, the side wall of the valve seat is provided with a lower air vent groove connecting the interior of the valve seat and the lower air vent hole, the position of the diaphragm corresponding to the lower air vent hole is provided with a mounting hole, the upper fixed seat includes three basic upper fixed seats and one vent type upper fixed seat, the lower surface of the vent type upper fixed seat is formed with a non-through upper air vent hole, and the inner side wall of the valve cover is formed with an upper air vent groove connecting the interior of the upper valve cover and the upper air vent hole; a metal sealing plate with a diameter larger than the diameter of the first through hole is fixed to the middle part of the upper side of the diaphragm, and a spring is provided between the metal sealing plate and the valve cover.

[0011] By adopting the above technical solution, a special vent type lower fixed seat and a vent type upper fixed seat are provided, and upper vent holes, lower vent holes and mounting holes are provided on them so that the air flow can flow from the valve seat into the valve body. The metal sealing plate is squeezed downward under the action of the spring, so that the diaphragm fits on the upper end face of the abutment rod to form a sealing surface. When the exhaust hole is sealed and compressed air is introduced into the second through hole, the compressed air will enter the valve cover from the valve seat, so that the air pressure in the valve seat and the valve cover is balanced. At this time, due to the force of the spring, the diaphragm is still attached to the abutment rod. When the exhaust hole is opened, the gas in the valve cover is discharged from the exhaust hole, the air pressure in the valve seat is greater than the air pressure in the valve cover, the diaphragm opens, and the compressed air in the valve seat is quickly discharged from the first through hole.

[0012] The present invention is further configured as follows: the upper ventilation groove and the lower ventilation groove extend from the upper ventilation hole and the lower ventilation hole toward the inside of the valve body, and extend in different directions.

[0013] By adopting the above technical solution, the upper ventilation groove and the lower ventilation groove extend in different directions, so that the upward force exerted on the diaphragm when the gas flows from the lower ventilation groove of the valve seat to the lower ventilation hole and the downward force exerted on the diaphragm when the gas flows from the upper ventilation hole through the upper ventilation groove to the inside of the valve cover are staggered, thereby preventing the diaphragm from folding back and forth at this location and causing breakage and damage.

[0014] The present invention is further configured as follows: a metal ring is fixedly arranged in the mounting hole, and a central vent hole is formed in the middle of the metal ring.

[0015] By adopting the above technical solution, the air pressure entering the valve body from the second through hole can be controlled to flow slowly through the pre-element. The middle vent hole provided on the metal ring can accurately control the gas flow from the valve seat into the valve cover, so that the pressure difference between the air pressure in the valve seat and the air pressure in the valve cover is always less than the elastic force of the spring. At the same time, the metal ring can prevent the diaphragm from cracking at the mounting hole and causing functional failure.

[0016] The present invention is further configured as follows: a convex block is formed in the middle of the lower side surface of the valve cover, a circular groove is formed in the center of the convex block, and one end of the spring is located in the circular groove.

[0017] By adopting the above technical solution, by embedding one end of the spring into the circular groove, the operator does not need to carefully position the spring during installation, which makes installation more convenient. At the same time, it can avoid the spring being misplaced during the movement of the diaphragm, thereby affecting the accuracy of the valve body.

[0018] The present invention is further configured as follows: a circumferential circle of the metal sealing plate extends upward to form a limiting ring.

[0019] By adopting the above technical solution, a limiting ring is provided to limit the position of the spring and the metal sealing plate, so that the lower end of the spring will not fall off the metal sealing plate.

[0020] The present invention is further configured as follows: the exhaust hole is located at the bottom of the circular groove and has a diameter smaller than the circular groove; a plurality of flow channel grooves connected to the circular groove are formed on a circumferential circle of the protrusion.

[0021] By adopting the above technical solution, the exhaust hole is arranged in the circular groove and the exhaust hole is connected to other areas in the valve cover through the flow channel groove, so that the gas in the valve cover can be quickly discharged when the exhaust hole is opened.

[0022] The present invention is further configured as follows: a metal mounting plate is provided on the side of the diaphragm facing away from the metal sealing plate, a connecting pipe is formed in the middle of the metal mounting plate, the connecting pipe passes through the diaphragm and the metal sealing plate and is connected with the metal sealing plate, an annular sealing groove is formed on the side of the metal mounting plate facing the diaphragm, and an annular sealing protrusion that cooperates with the sealing groove is formed on the side of the diaphragm facing the metal mounting plate.

[0023] By adopting the above technical solution, the diaphragm and the metal sealing plate are connected to form a whole through the metal mounting plate, and the sealing protrusion and the sealing groove form a sealing surface, so that there will be no air leakage at the position where the connecting pipe passes through the center of the diaphragm.

[0024] Another object of the present invention is to provide a quick exhaust valve using the valve body.

[0025] The above-mentioned object of the present invention is achieved through the following technical solution: a quick exhaust valve, comprising the above-mentioned valve body and a control element for controlling the opening and closing of the exhaust hole of the valve body.

[0026] By adopting the above technical solution, the quick exhaust valve uses the valve body to achieve the effects of good sealing and quick assembly.

[0027] In summary, the beneficial technical effects of the present invention are:

[0028] 1. The position of the diaphragm is not easy to deviate during installation. At the same time, the positioning protrusion and the upper positioning groove and the lower positioning groove form a second gradient sealing surface in addition to the extrusion sealing surface between the diaphragm and the valve seat and the valve cover, achieving a better sealing effect;

[0029] 2. A metal ring is used to form a central vent hole to fix the size of the vent hole when the gas enters the valve cover from the valve seat, so that when the vent hole is exhausted, the gas discharge speed in the valve cover is stably greater than the speed at which the gas in the valve seat enters the valve cover to form a pressure difference to open the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of an embodiment;

[0031] Figure 2 is a schematic diagram of the structure of the valve seat in the embodiment;

[0032] Figure 3 is a schematic diagram of the structure of the diaphragm in the embodiment;

[0033] Figure 4 yes Figure 3 The enlarged view of point A in the middle;

[0034] Figure 5 is an exploded schematic diagram of the diaphragm and the metal mounting plate in the embodiment;

[0035] Figure 6Schematic diagram of the structure of the valve cover in the embodiment.

[0036] Reference numerals: 1, valve seat; 2, valve cover; 3, diaphragm; 4, abutment rod; 5, first through hole; 6, connection block; 7, second through hole; 8, basic lower fixing seat; 9, ventilation lower fixing seat; 10, lower fixing screw hole; 11, lower ventilation hole; 12, lower ventilation groove; 13, lower positioning groove; 14, center positioning groove; 15, angle positioning groove; 16, basic fixing rubber sheet; 17, ventilation fixing rubber sheet; 18, middle fixing hole; 19, mounting hole; 20. Metal ring; 21. Middle vent hole; 22. Positioning protrusion; 23. Metal sealing plate; 24. Limiting ring; 25. Basic upper fixing seat; 26. Ventilation upper fixing seat; 27. Upper fixing hole; 28. Upper vent hole; 29. ​​Upper positioning groove; 30. Upper vent groove; 31. Bump; 32. Round groove; 33. Runner groove; 34. Exhaust hole; 35. Spring; 36. Metal mounting plate; 37. Connecting pipe; 38. Sealing groove; 39. Sealing protrusion. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0038] like Figure 1 As shown, a valve body comprises a valve seat 1, a valve cover 2 covering the valve seat 1, and a diaphragm 3 located between the valve seat 1 and the valve cover 2.

[0039] like Figure 2 As shown, the upper end face of the valve seat 1 is open, and an abutting rod 4 with a vertical axis is integrally formed on the inner bottom face of the valve seat 1. The upper end face height of the abutting rod 4 is lower than the upper end face height of the valve seat 1, and a first through hole 5 penetrating the valve seat 1 is formed in the middle of the abutting rod 4, and an internal thread is formed at the lower end of the first through hole 5. A connecting block 6 is integrally formed on the outer side of the valve seat 1, and a second through hole 7 with a horizontal axis is formed in the middle of the connecting block 6, and an internal thread is formed on the inner side of the second through hole 7.

[0040] like Figure 2As shown, four lower fixed seats are integrally formed on the outer wall of the valve seat 1 near the port of the valve seat 1, and the four lower fixed seats are evenly distributed along the outer wall of the valve seat 1. The four lower fixed seats include three basic lower fixed seats 8 and a ventilated lower fixed seat 9 adjacent to the second through hole 7. A lower fixing screw hole 10 penetrating the basic lower fixed seat 8 is formed on the upper surface of each basic lower fixed seat 8. A lower fixing screw hole 10 penetrating the ventilated lower fixed seat 9 and a non-penetrating lower vent hole 11 are formed on the upper surface of the ventilated lower fixed seat 9, and the lower vent hole 11 is spaced apart from the lower fixing screw hole 10. A lower vent groove 12 is formed on the inner wall of the valve seat 1, and the lower vent groove 12 is located on the line connecting the lower vent hole 11 and the center point of the valve seat 1, and the lower vent groove 12 extends vertically upward along the inner wall of the valve seat 1 and is connected to the lower vent hole 11. The upper end surface of the valve seat 1 is formed with a lower positioning groove 13 cooperating with the diaphragm 3. The lower positioning groove 13 includes a circular central positioning groove 14 and an angle positioning groove 15 formed at the lower vent hole 11. The central positioning groove 14 and the angle positioning groove 15 are connected.

[0041] like Figure 3 and Figure 4 As shown, four fixed rubber sheets are evenly distributed on the circumference of the diaphragm 3, and the four fixed rubber sheets include three basic fixed rubber sheets 16 and one ventilated fixed rubber sheet 17. A central fixing hole 18 is formed on each basic fixed rubber sheet 16, and a central fixing hole 18 is formed on the ventilated fixed rubber sheet 17. A mounting hole 19 is also formed on the ventilated fixed rubber sheet 17 at the side of the central fixing hole 18, and a metal ring 20 is installed in the mounting hole 19. The metal ring 20 is grooved on the circumference and fits into the mounting hole 19, and then the metal ring 20 is squeezed and tightly connected with the ventilated fixed rubber sheet 17. A central vent hole 21 is formed in the middle of the metal ring 20. A circle of positioning protrusions 22 that fit the inner wall of the lower positioning groove 13 are formed on the upper and lower sides of the diaphragm 3. A metal sealing plate 23 is fixed in the middle of the diaphragm 3 . The metal sealing plate 23 is circular and has a diameter greater than that of the first through hole 5 . A limit ring 24 is formed by extending upwards around the circumference of the metal sealing plate 23 .

[0042] like Figure 3 and Figure 5 As shown, a metal mounting plate 36 is provided on the side of the diaphragm 3 facing away from the metal sealing plate 23, and a connecting pipe 37 is formed in the middle of the metal mounting plate 36. After the connecting pipe 37 passes through the diaphragm 3 and the metal sealing plate 23, the connecting pipe 37 is expanded outward by stamping and fixed to the metal sealing plate 23. An annular sealing groove 38 is formed on the side of the metal mounting plate 36 facing the diaphragm 3, and an annular sealing protrusion 39 is formed on the side of the diaphragm 3 facing the metal mounting plate 36. The sealing protrusion 39 is directly opposite to the position of the sealing groove 38 and abuts against the bottom surface of the sealing groove 38 to form a sealing surface.

[0043] like Figure 6As shown, four upper fixing seats are evenly formed on the circumference of the valve cover 2, and the four upper fixing seats include three basic upper fixing seats 25 and one ventilated upper fixing seat 26. The lower surface of each basic upper fixing seat 25 is formed with a through upper fixing hole 27, and the lower surface of the ventilated upper fixing seat 26 is formed with a through upper fixing hole 27 and a non-through upper vent hole 28. The lower surface of the valve cover 2 is formed with an upper positioning groove 29 that is the same as the lower positioning groove 13. An upper vent groove 30 is formed on the inner side wall of the valve cover 2, and the upper vent groove 30 extends from the connection with the upper vent hole 28 into the valve cover 2, and the extension direction does not point to the center of the valve cover 2. A convex block 31 is formed in the middle of the lower side of the valve cover 2, and a circular groove 32 is formed in the center of the convex block 31. Four flow channel grooves 33 connected to the circular groove 32 are formed on the circumference of the convex block 31. The bottom of the circular groove 32 is formed with an exhaust hole 34 that penetrates the valve cover 2 and has a diameter smaller than the diameter of the circular groove 32. The diameter of the exhaust hole 34 is larger than the diameters of all the vent holes. Figure 3 and Figure 6 As shown, one end of the spring 35 abuts against the bottom surface of the circular groove 32 , and the other end of the spring 35 abuts against the metal sealing plate 23 .

[0044] After the valve seat 1 and the valve cover 2 cooperate to sandwich the diaphragm 3 in the middle, bolts are passed through the upper fixing hole 27 and the middle fixing hole 18 and then cooperate with the lower fixing screw hole 10 to form the entire valve body.

[0045] Embodiment 2:

[0046] A quick exhaust valve comprises the valve body described in the first embodiment and a control element installed at the exhaust hole 34 of the valve body.

[0047] During use:

[0048] The control element closes the exhaust hole 34 , and the metal sealing plate 23 is pressed downward under the action of the spring 35 , so that the diaphragm 3 is attached to the upper end surface of the abutting rod 4 to form a sealing surface.

[0049] When the second through hole 7 is inlet, the gas enters the valve seat 1 and enters the valve cover 2 through the lower ventilation groove 12, the lower ventilation hole 11, the middle ventilation hole 21, and the upper ventilation hole 28. Since the pressure difference between the valve seat 1 and the valve cover 2 is always less than the elastic force of the spring 35 at this time, the diaphragm 3 is always tightly attached to the abutment rod 4, and a large amount of compressed air is stored in the valve body. When the control element is opened, the exhaust hole 34 is connected to the outside atmosphere, and the compressed air in the valve cover 2 is discharged through the exhaust hole 34. At this time, the air pressure in the valve cover 2 decreases, and the air pressure in the valve seat 1 is greater than the air pressure in the valve cover 2, pushing the diaphragm 3 upward, and the first through hole 5 is opened. The compressed air in the valve seat 1 is quickly discharged through the first through hole 5.

[0050] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve body, comprising a valve seat (1), a valve cover (2) and a diaphragm (3) located between the valve seat (1) and the valve cover (2), wherein the valve seat (1) is formed with an abutment rod (4), a first through hole (5) penetrating the valve seat (1) is formed in the middle of the abutment rod (4), a second through hole (7) penetrating the valve seat (1) is formed on the side of the valve seat (1), and an exhaust hole (34) is formed on the valve cover (2), wherein: The upper surface of the valve seat (1) is formed with a lower positioning groove (13), the lower surface of the valve cover (2) is formed with an upper positioning groove (29), and the upper and lower surfaces of the diaphragm (3) are formed with positioning protrusions (22) that fit with the inner walls of the upper positioning groove (29) and the lower positioning groove (13); four lower fixing seats are evenly distributed along the circumference at a position close to the port of the valve seat (1) on the outer wall of the valve seat (1), and a through lower fixing screw hole (10) is formed on the upper surface of each lower fixing seat; four fixing rubber sheets are formed on a circumference of the diaphragm (3), and each fixing rubber sheet is formed with a middle fixing hole (18); four upper fixing seats are evenly distributed on a circumference of the valve cover (2), and a through upper fixing hole (27) is formed on the lower surface of each upper fixing seat, and bolts pass through the upper fixing holes (27). The middle fixing hole (18) is connected to the lower fixing screw hole (10) after being threaded through the middle fixing hole (18); the lower fixing seat comprises three basic lower fixing seats (8) and a ventilated lower fixing seat (9); the upper surface of the ventilated lower fixing seat (9) is formed with a non-penetrating lower vent hole (11); a lower vent groove (12) communicating with the interior of the valve seat (1) and the lower vent hole (11) is provided on the side wall of the valve seat (1); a mounting hole (19) is provided on the diaphragm (3) at a position corresponding to the lower vent hole (11); the upper fixing seat comprises three basic upper fixing seats (25) and a ventilated upper fixing seat (26); the lower surface of the ventilated upper fixing seat (26) is formed with a non-penetrating upper vent hole (28); An upper vent groove (30) is formed on the inner wall of the valve cover (2) and communicates with the interior of the upper valve cover (2) and the upper vent hole (28); a metal sealing plate (23) having a diameter greater than that of the first through hole (5) is fixed to the middle of the upper side of the diaphragm (3), and a spring (35) is provided between the metal sealing plate (23) and the valve cover (2).

2. The valve body according to claim 1, characterized in that: The upper ventilation groove (30) and the lower ventilation groove (12) extend from the upper ventilation hole (28) and the lower ventilation hole (11) toward the inside of the valve body, and extend in different directions.

3. The valve body according to claim 2, characterized in that: A metal ring (20) is fixedly arranged in the mounting hole (19), and a central vent hole (21) is formed in the middle of the metal ring (20).

4. The valve body according to claim 3, characterized in that: A convex block (31) is formed in the middle of the lower side of the valve cover (2), a circular groove (32) is formed in the center of the convex block (31), and one end of the spring (35) is located in the circular groove (32).

5. The valve body according to claim 4, characterized in that: A limit ring (24) is formed by extending upwards around the circumference of the metal sealing plate (23).

6. The valve body according to claim 5, characterized in that: The exhaust hole (34) is located at the bottom of the circular groove (32) and has a diameter smaller than the circular groove (32). A plurality of flow channel grooves (33) connected to the circular groove (32) are formed on a circumferential circle of the protrusion (31).

7. The valve body according to claim 1, characterized in that: A metal mounting plate (36) is provided on the side of the diaphragm (3) facing away from the metal sealing plate (23); a connecting pipe (37) is formed in the middle of the metal mounting plate (36); the connecting pipe (37) passes through the diaphragm (3) and the metal sealing plate (23) and is connected to the metal sealing plate (23); an annular sealing groove (38) is formed on the side of the metal mounting plate (36) facing the diaphragm (3); and an annular sealing protrusion (39) that cooperates with the sealing groove (38) is formed on the side of the diaphragm (3) facing the metal mounting plate (36).

8. A quick exhaust valve, characterized by: It comprises the valve body as claimed in any one of claims 1 to 7 and a control element for controlling the opening and closing of the exhaust hole (34) of the valve body.

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