Integral quick exhaust valve for pneumatic cylinder

Abstract

The utility model discloses an integral quick exhaust valve for a pneumatic cylinder. The integral quick exhaust valve comprises a valve body, a three-way valve core and a diaphragm, the three-way valve core is fixed in an inner cavity of the valve body; one end face of the valve body is provided with an air inlet corresponding to the first through hole of the three-way valve element, the other end face is provided with an exhaust port corresponding to the second through hole of the three-way valve element, and the side wall is provided with an air outlet corresponding to the third through hole of the three-way valve element. The diaphragm is slidably connected into a core body of the three-way valve core, and the diaphragm can slide along the inner wall of the three-way valve core through the pressure difference between the air inlet and the air outlet so as to switch and seal the first through hole or the second through hole. The cavity corresponding to the exhaust port and the valve body are of an integrated structure, in the replacement process of the silencer, the problem that the sealing performance between the cavity corresponding to the exhaust port and the valve body is reduced cannot occur, the exhaust effect of the silencer is guaranteed, integrated forming is achieved, and material waste and manufacturing cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of quick exhaust valves, and more specifically to an integral quick exhaust valve for a pneumatic cylinder. Background Art

[0002] The quick exhaust valve is an important component in pneumatic control. It is a one-way directional control component. The quick exhaust valve is often installed between the reversing valve and the cylinder, so that the exhaust of the cylinder can be quickly discharged without passing through the reversing valve, thereby speeding up the reciprocating motion of the cylinder and shortening the working cycle. In general, the quick exhaust valve is directly installed on the cylinder, or should be installed close to the cylinder, and is suitable for occasions where the cylinder is required to move quickly.

[0003] The exhaust port of the traditional quick exhaust valve is threadedly connected to the valve body through the pipe body, which is equivalent to a separate structure of the exhaust port and the valve body. In order to reduce the working noise of the cylinder exhaust, a muffler is usually installed at the exhaust port. However, when the cylinder reciprocates for a long time, it will vibrate, which will cause the threads between the pipe body and the valve body with the exhaust port to loosen, which will cause the sealing performance of the quick exhaust valve to decrease, resulting in air leakage and affecting the operation of the cylinder;

[0004] At the same time, the muffler will need to be replaced during use. During the replacement of the muffler, since the muffler is threadedly connected to the pipe body, and the pipe body is threadedly connected to the valve body, the threads of the pipe body and the valve body will inevitably loosen when the muffler is unscrewed outward along the pipe body. Even a slight loosening will affect the sealing effect of the quick exhaust valve. This slight loosening cannot be judged by the naked eye of the operator, which affects the working efficiency of the cylinder and the production of equipment.

[0005] Therefore, how to provide an integrated quick exhaust valve in which the pipe body and the valve body are integrally formed to ensure the installation effect of the muffler while facilitating the replacement of the muffler is a problem that technical personnel in this field urgently need to solve. Utility Model Content

[0006] In view of this, the utility model provides an integrated quick exhaust valve for a pneumatic cylinder, aiming to solve the above technical problems.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An integrated quick exhaust valve for a pneumatic cylinder comprises a valve body, a three-way valve core and a diaphragm.

[0009] The three-way valve core is fixed to the inner cavity of the valve body; one end surface of the valve body is provided with an air inlet corresponding to the first through hole of the three-way valve core, the other end surface is provided with an air outlet corresponding to the second through hole of the three-way valve core, and one side wall of the valve body is provided with an air outlet corresponding to the third through hole of the three-way valve core;

[0010] The diaphragm is slidably connected to the core of the three-way valve core. The diaphragm can slide along the inner wall of the three-way valve core by utilizing the pressure difference between the air inlet and the air outlet to switch and close the first through hole or the second through hole.

[0011] The beneficial effect of the above technical solution is that when compressed air is input into the air inlet, the pressure of the air inlet is greater than that of the air outlet, the diaphragm slides toward the second through hole and closes it, and the air inlet is connected with the air outlet; when air pressure is input into the air outlet, the pressure of the air outlet is greater than that of the air inlet, the diaphragm can slide toward the first through hole and close it, and the exhaust port is connected with the air outlet, and the muffler is installed at the exhaust port, and the exhaust port is arranged on the valve body to form an integrated structure with the valve body. Compared with the separate structure of the exhaust port and the valve body, the disassembly of the muffler in the integral structure of the exhaust port and the valve body will not affect the performance of the exhaust port.

[0012] Preferably, a fixing block is further included, and an assembly groove is provided on the end surface of the valve body relative to the first through hole, and the fixing block is detachably connected in the assembly groove, and the air inlet is provided on the fixing block. The air inlet is connected to the valve body through the fixing block, and the air inlet can be connected to the source through a hard air pipe to ensure effective air supply.

[0013] Preferably, a sealing strip is embedded between the outer wall of the fixing block and the groove wall of the assembly groove to ensure the sealing performance between the fixing block and the valve body and prevent air leakage.

[0014] Preferably, the inner wall of the valve body relative to the assembly groove is provided with a first internal thread, the outer wall of the fixing block is provided with an external thread, and the end surface of the fixing block away from the inner cavity of the valve body is provided with an assembly hole to screw the fixing block into the assembly groove. The fixing block can be threadedly connected to the valve body using needle-nosed pliers, and the assembly hole facilitates the installation and removal of the fixing block.

[0015] Preferably, the inner wall of the valve body relative to the exhaust port is provided with a second internal thread for threaded connection with a muffler, the inner wall of the valve body relative to the air outlet is provided with a third internal thread for threaded connection with a cylinder exhaust pipe, and the inner wall of the fixing block is provided with a fourth internal thread for threaded connection with an air intake pipe. The exhaust port is connected to the muffler via the second internal thread, the air outlet is connected to the cylinder via the third internal thread, and the air intake is connected to the air source via the fourth internal thread. The threaded connection facilitates the installation and removal of the quick exhaust valve.

[0016] Preferably, a sealing ring is provided between the peripheral side of the diaphragm and the inner wall of the three-way valve core to ensure the sealing performance between the diaphragm and the three-way valve core and prevent air leakage.

[0017] Preferably, a fixing hole is provided on the top side wall of the valve body to facilitate the installation of the valve body and the equipment.

[0018] The end of the three-way valve core opposite to the second through hole is a bell mouth, and the third through hole is provided on the side wall of the three-way valve core close to the bell mouth. With the bell mouth, when there is no gas source input to the air inlet and the cylinder is exhausted, the gas exhausted from the cylinder can enter the three-way valve core through the air outlet through the enlarged part of the bell mouth and push the diaphragm toward the first through hole to close the first through hole, and the passage between the air outlet and the exhaust port is opened, thereby achieving cylinder exhaust.

[0019] Preferably, the side wall of the valve body is provided with a plurality of grooves adapted to the shape of the inner cavity thereof, thereby reducing material waste and manufacturing costs.

[0020] Preferably, the valve body is formed by integral forging and pressing of aluminum alloy material. The integral molding method makes the valve body and the exhaust port an integrated structure, and the exhaust port will not loosen during the replacement of the muffler to affect the exhaust effect of the quick exhaust valve.

[0021] It can be seen from the above technical scheme that compared with the prior art, the utility model discloses an integral quick exhaust valve for a pneumatic cylinder. Compared with the traditional method of using a tube body and a valve body as an exhaust port through a threaded connection, the exhaust port is opened on the valve body in the present application. During the replacement of the muffler, there will be no problem of loose connection between the cavity corresponding to the exhaust port and the valve body to affect its sealing performance. The exhaust effect of the exhaust port during the replacement of the muffler can be guaranteed even when the workers are not meticulous in their work. In addition, the use of one-piece forging and pressing reduces material waste and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of the quick exhaust valve provided by the utility model;

[0024] Figure 2 A cross-sectional view of a quick exhaust valve provided by the utility model;

[0025] Figure 3 This is a side view of the air inlet of the quick exhaust valve provided by the utility model.

[0026] in,

[0027] 1-valve body; 2-three-way valve core; 3-fixing block; 4-air inlet; 5-exhaust port; 6-air outlet; 7-diaphragm; 8-sealing strip; 9-sealing ring; 10-assembly hole; 11-fixing hole. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See attached Figures 1 to 3 The utility model discloses an integrated quick exhaust valve for a pneumatic cylinder. Compared with the traditional quick exhaust valve, the exhaust port and the valve body are integrated into a structure, and the exhaust effect of the exhaust port is not affected during the muffler replacement operation. The valve body 1, the three-way valve core 2 and the diaphragm 7 are included;

[0030] The three-way valve core 2 is fixed in the inner cavity of the valve body 1; an air inlet 4 corresponding to the first through hole of the three-way valve core 2 is provided on one end surface of the valve body 1, an air outlet 5 corresponding to the second through hole of the three-way valve core 2 is provided on the other end surface, and an air outlet 6 corresponding to the third through hole of the three-way valve core 2 is provided on one side wall of the valve body 1;

[0031] The diaphragm 7 is slidably connected in the core of the three-way valve core 2. The diaphragm 7 can slide along the inner wall of the three-way valve core 2 by utilizing the pressure difference between the air inlet 4 and the air outlet 6 to switch and close the first through hole or the second through hole.

[0032] The quick exhaust valve has three valve ports, namely the air inlet, the air outlet and the air outlet. When compressed air is input into the air inlet, the diaphragm is pushed toward the air outlet to block the second through hole of the three-way valve core corresponding to the air outlet. At this time, the air inlet is connected to the air outlet to supply air to the cylinder.

[0033] When there is no compressed air input to the air inlet, the gas in the cylinder passes through the air outlet to make the diaphragm move toward the air inlet to block the first through hole of the three-way valve core corresponding to the air inlet, the air path between the air outlet and the exhaust port is connected, and the gas is quickly discharged through the exhaust port. The quick exhaust valve is installed between the reversing valve and the cylinder, so that the exhaust of the cylinder does not pass through the reversing valve, but is discharged through the quick exhaust valve, thereby accelerating the reciprocating motion of the cylinder and shortening the working cycle of the cylinder.

[0034] In order to further optimize the above technical solution, a fixing block 3 is further included. The end surface of the valve body 1 relative to the first through hole is provided with an assembly groove. The fixing block 3 is detachably connected in the assembly groove. The fixing block 3 is provided with an air inlet 4. The air inlet can be detachably connected to the valve body by using the fixing block. The air inlet is connected to the air source. When the fixing block is used to connect the air source, a harder air pipe can be selected, which can facilitate the delivery of air pressure and improve the delivery capacity of the cylinder.

[0035] In order to further optimize the above technical solution, ensure the sealing performance between the fixing block and the valve body, and prevent air leakage, a sealing strip 8 is embedded between the outer wall of the fixing block 3 and the groove wall of the assembly groove.

[0036] The sealing strip can be triangular in shape and embedded in the assembly groove. When the fixing block is installed, the sealing strip can be pressed against the groove wall of the assembly groove.

[0037] In order to further optimize the above technical solution and facilitate the installation and removal of the fixing block, the inner wall of the valve body 1 relative to the assembly groove is provided with a first internal thread, the outer wall of the fixing block 3 is provided with an external thread, and the end surface of the fixing block 3 away from the inner cavity of the valve body 1 is provided with an assembly hole 10 to screw the fixing block 3 into the assembly groove. The fixing block can be easily installed and removed using pointed pliers.

[0038] In order to further optimize the above technical solution and facilitate the installation of the quick exhaust valve, the inner wall of the valve body (1) relative to the exhaust port 5 is provided with a second internal thread for threaded connection with the muffler, the inner wall of the valve body 1 relative to the outlet port 6 is provided with a third internal thread for threaded connection with the cylinder exhaust pipe, and the inner wall of the fixing block 3 is provided with a fourth internal thread for threaded connection with the intake pipe.

[0039] In order to further optimize the above technical solution, ensure the sealing performance between the diaphragm and the three-way valve core, and prevent air leakage, a sealing ring 9 is provided between the peripheral side of the diaphragm 7 and the inner wall of the three-way valve core 2.

[0040] In order to further optimize the above technical solution, facilitate the fixation of the valve body, and ensure its stable performance during use, a fixing hole 11 is opened on the top side wall of the valve body 1.

[0041] In order to further optimize the above technical solution and better realize the sliding of the diaphragm along the direction of the first through hole, the end of the three-way valve core 2 relative to the second through hole is a bell mouth, and the third through hole is opened on the side wall of the three-way valve core 2 close to the bell mouth.

[0042] When there is no compressed air input to the air inlet and the cylinder is exhausted from the air outlet, the air exhausted from the cylinder enters the three-way valve core from the air outlet and pushes the diaphragm to slide toward the first through hole to seal it, opening the air path between the air outlet and the exhaust port, and the air in the cylinder is discharged from the exhaust port.

[0043] In this embodiment, the valve body 1 is formed by integral forging and pressing of aluminum alloy material, so as to ensure that the cavity corresponding to the exhaust port and the valve body are an integral structure.

[0044] In order to further optimize the above technical solution, reduce material waste and lower manufacturing costs, the side wall of the valve body 1 is provided with a plurality of grooves adapted to the shape of its inner cavity.

[0045] A groove is provided on the side of the valve body and a three-way valve core is fixed inside the valve body, thereby ensuring its performance and reducing material waste.

[0046] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0047] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated quick exhaust valve for a pneumatic cylinder, characterized in that: It comprises a valve body (1), a three-way valve core (2) and a diaphragm (7). The three-way valve core (2) is fixed in the inner cavity of the valve body (1); one end surface of the valve body (1) is provided with an air inlet (4) corresponding to the first through hole of the three-way valve core (2), the other end surface is provided with an air outlet (5) corresponding to the second through hole of the three-way valve core (2), and one side wall of the valve body (1) is provided with an air outlet (6) corresponding to the third through hole of the three-way valve core (2); The diaphragm (7) is slidably connected to the core of the three-way valve core (2). The diaphragm (7) can slide along the inner wall of the three-way valve core (2) by utilizing the pressure difference between the air inlet (4) and the air outlet (6) to switch and close the first through hole or the second through hole.

2. An integrated quick exhaust valve for a pneumatic cylinder according to claim 1, characterized in that: It also comprises a fixing block (3), the end surface of the valve body (1) opposite to the first through hole is provided with an assembly groove, the fixing block (3) is detachably connected in the assembly groove, and the air inlet (4) is provided on the fixing block (3).

3. An integrated quick exhaust valve for a pneumatic cylinder according to claim 2, characterized in that: A sealing strip (8) is embedded between the outer wall of the fixing block (3) and the groove wall of the assembly groove.

4. An integrated quick exhaust valve for a pneumatic cylinder according to claim 2, characterized in that: The valve body (1) is provided with a first internal thread on the inner wall relative to the assembly groove, the outer wall of the fixing block (3) is provided with an external thread, and the end surface of the fixing block (3) away from the inner cavity of the valve body (1) is provided with an assembly hole (10) for screwing the fixing block (3) into the assembly groove.

5. An integrated quick exhaust valve for a pneumatic cylinder according to claim 4, characterized in that: The valve body (1) is provided with a second internal thread on the inner wall relative to the exhaust port (5) for threaded connection with the muffler, the valve body (1) is provided with a third internal thread on the inner wall relative to the outlet port (6) for threaded connection with the cylinder exhaust pipe, and the fixing block (3) is provided with a fourth internal thread on the inner wall for threaded connection with the intake pipe.

6. An integrated quick exhaust valve for a pneumatic cylinder according to claim 1, characterized in that: A sealing ring (9) is provided between the peripheral side of the diaphragm (7) and the inner wall of the three-way valve core (2).

7. An integrated quick exhaust valve for a pneumatic cylinder according to claim 1, characterized in that: A fixing hole (11) is provided on the top side wall of the valve body (1).

8. An integrated quick exhaust valve for a pneumatic cylinder according to claim 1, characterized in that: The end of the three-way valve core (2) opposite to the second through hole is a bell mouth, and the third through hole is formed on the side wall of the three-way valve core (2) close to the bell mouth.

9. An integrated quick exhaust valve for a pneumatic cylinder according to claim 1, characterized in that: The side wall of the valve body (1) is provided with a plurality of grooves adapted to the shape of its inner cavity.

10. An integrated quick exhaust valve for a pneumatic cylinder according to claim 9, characterized in that: The valve body (1) is formed by integral forging and pressing of an aluminum alloy material.

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