Stop type shaft valve with flow compensation function

Abstract

The utility model discloses a stop type shaft valve with a flow compensation function. The stop type shaft valve comprises an upper end cover, a lower end cover and a valve body arranged between the upper end cover and the lower end cover. The upper end cover and the lower end cover are connected by designing the valve body; the valve body comprises a valve body ring shell arranged between an upper end cover and a lower end cover, and a piston arranged in the ring shell; a valve element connected with the piston in an abutting mode is arranged in the lower end cover, and a compensation air channel is formed in the side portion of the lower end cover. A sealing ring is arranged on the valve element, a plurality of exhaust ports are formed in the periphery of the valve element, and exhaust channels communicated with the exhaust ports are formed in the bottom of the valve element. According to the utility model, the function of bypass compensation connection when the valve core is closed is realized, two groups of ventilation branches are arranged, the flow conversion of an output working port is realized, the function of switching two flows can be completed, and meanwhile, the requirement that a bypass is still needed for gas input after a main passage is disconnected is met.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically a shut-off shaft valve with flow compensation function. Background Technology

[0002] Valves are widely used components in pneumatic circuits;

[0003] Currently, when the valve is working, the flow rate at the output port is changed by controlling the valve core. The degree of closure of the valve core is used to complete the opening and closing of the flow path or the flow rate regulation.

[0004] While the control of flow rate can be diversified, it places extremely high demands on the closing accuracy of the valve core; otherwise, the expected flow rate will differ from the actual flow rate.

[0005] Meanwhile, in some scenarios, even after the main passage is disconnected, it is still necessary to input gas through the bypass passage. In this case, traditional valves are not up to the task.

[0006] Therefore, it is necessary to design a valve that, after the valve core is closed, still has other passages to complete the input of gas, and can simultaneously adjust the flow rate at the output port, thereby solving the current problem. Utility Model Content

[0007] Purpose of the utility model: To provide a shut-off shaft valve with flow compensation function to solve the above-mentioned problems existing in the prior art.

[0008] Technical solution: A shut-off shaft valve with flow compensation function, comprising:

[0009] An upper end cover, a lower end cover, and a valve body disposed between the upper end cover and the lower end cover; the upper end cover and the lower end cover are connected by designing the valve body;

[0010] The valve body includes a valve body annular shell disposed between the upper end cover and the lower end cover, and a piston disposed within the annular shell; the piston extends into the upper end cover and the lower end cover, and slides along the inner walls of the upper end cover and the lower end cover.

[0011] The lower end cover is provided with a valve core that abuts against the piston, and a compensation air passage is opened on the side of the lower end cover;

[0012] The valve core is provided with a sealing ring, has multiple exhaust ports on its periphery, and has an exhaust channel at the bottom that communicates with the multiple exhaust ports.

[0013] The sealing ring is located above the multiple exhaust ports and abuts against the piston;

[0014] An air inlet is provided inside the upper end cover and the piston, and an air outlet is provided inside the lower end cover.

[0015] When the valve core separates from the piston, the intake and exhaust ports are connected;

[0016] When the valve core comes into contact with the piston, the intake and exhaust ports are disconnected, and air is continuously supplied by the compensation air passage.

[0017] This invention features a compensating air passage designed within the lower housing, along with a contact fit between the piston and the valve core. When the valve core separates from the piston, the intake and exhaust ports are connected; when the valve core abuts against the piston, the intake and exhaust ports are disconnected. At this time, the compensating air passage continuously supplies air, achieving the function of bypass compensation connection when the valve core is closed. It has two sets of ventilation branches, which not only realizes the flow rate change of the output working port and can complete the two flow rate switching functions, but also meets the requirement that gas should still be input through the bypass passage when the main passage is disconnected.

[0018] In a further embodiment, the upper end cover and the lower end cover have a predetermined distance between them;

[0019] The valve body ring connects the upper end cover and the lower end cover, and together with the upper end cover and the lower end cover, they form an air cavity.

[0020] In a further embodiment, the piston is provided with a push ring on its periphery that is adapted to the air chamber, and the push ring is adapted to the valve body ring shell.

[0021] In a further embodiment, the valve body annular shell side is provided with a first air port and a second air port;

[0022] The first air inlet extends to one end of the air chamber, and the second air inlet extends to the other end of the air chamber.

[0023] The first air port is located above the push ring, and the second air port is located below the push ring.

[0024] In a further embodiment, a spring is provided between the push ring and the lower end cover.

[0025] Beneficial effects: This utility model discloses a shut-off shaft valve with flow compensation function. This utility model designs a compensation air passage in the lower end shell, and at the same time designs a contact fit between the piston and the valve core. When the valve core is separated from the piston, the air inlet and the exhaust port are connected. When the valve core abuts against the piston, the air inlet and the exhaust port are disconnected. At this time, the compensation air passage continuously supplies air, realizing the function of bypass compensation connection when the valve core is closed. It has two sets of air passages, which realizes the flow rate change of the output working port and can complete the two flow rate switching functions. At the same time, it also meets the requirement that the bypass passage is still needed for gas input when the main passage is disconnected. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] The attached figures are labeled as follows:

[0028] 1. Top cover;

[0029] 21. Valve body ring; 22. Thrust ring; 23. Air chamber; 24. Spring; 25. First air port; 26. Second air port; 27. Piston;

[0030] 3. Lower end cap; 31. Valve core; 32. Exhaust port; 33. Compensation air passage. Detailed Implementation

[0031] This application relates to a shut-off shaft valve with flow compensation function, which will be explained in detail below through specific embodiments.

[0032] A shut-off shaft valve with flow compensation function includes:

[0033] Upper end cover 1, lower end cover 3, and valve body disposed between the upper end cover 1 and the lower end cover 3; the upper end cover 1 and the lower end cover 3 are connected by designing the valve body;

[0034] The valve body includes a valve body ring shell 21 disposed between the upper end cover 1 and the lower end cover 3, and a piston 27 disposed within the ring shell. The piston 27 extends into the upper end cover 1 and the lower end cover 3 and slides along the inner walls of the upper end cover 1 and the lower end cover 3.

[0035] The lower end cover 3 is provided with a valve core 31 that abuts against the piston 27, and a compensation air passage 33 is opened on the side of the lower end cover 3;

[0036] The valve core 31 is provided with a sealing ring, has multiple exhaust ports 32 on its periphery, and has an exhaust passage at the bottom that communicates with the multiple exhaust ports 32.

[0037] The sealing ring is located above the plurality of exhaust ports 32 and abuts against the piston 27;

[0038] An air inlet is provided inside the upper end cover 1 and the piston 27, and an air outlet is provided inside the lower end cover 3.

[0039] When the valve core 31 is separated from the piston 27, the intake passage and the exhaust port 32 are connected;

[0040] When the valve core 31 comes into contact with the piston 27, the intake passage and exhaust port 32 are disconnected, and air is continuously supplied by the compensation passage 33.

[0041] This utility model incorporates a compensating air passage 33 within the lower housing, along with a contact fit between the piston 27 and the valve core 31. When the valve core 31 separates from the piston 27, the intake passage and exhaust port 32 are connected. When the valve core 31 abuts against the piston 27, the intake passage and exhaust port 32 are disconnected. At this time, the compensating air passage 33 continuously supplies air, thus realizing the function of bypass compensation connection when the valve core 31 is closed. It has two sets of ventilation branches, which not only realizes the flow rate change of the output working port and can complete the two flow rate switching functions, but also meets the requirement that gas should still be input through the bypass passage when the main passage is disconnected.

[0042] When using this application, a one-way valve generally needs to be connected to the outside of the compensation airway 33 to avoid mutual interference between the two sets of airways during operation.

[0043] There is a predetermined distance between the upper end cover 1 and the lower end cover 3;

[0044] The valve body ring shell 21 connects the upper end cover 1 and the lower end cover 3, and together with the upper end cover 1 and the lower end cover 3, forms an air chamber 23.

[0045] The piston 27 is provided with a push ring 22 around its periphery that is adapted to the air chamber 23, and the push ring 22 is adapted to the valve body ring shell 21.

[0046] The valve body ring shell 21 is provided with a first air port 25 and a second air port 26 on its side.

[0047] The first air port 25 extends to one end of the air chamber 23, and the second air port 26 extends to the other end of the air chamber 23.

[0048] The first air port 25 is located above the push ring 22, and the second air port 26 is located below the push ring 22.

[0049] A spring 24 is provided between the push ring 22 and the lower end cover 3. The design of the spring 24 makes the piston 27 reset more quickly.

[0050] Working principle description: During operation, by filling the first air port 25 or the second air port 26 with air, the push ring 22 is pushed, thereby controlling the piston 27 to contact or disconnect from the valve core 31;

[0051] When the valve core 31 is disconnected from the piston 27, the gas passes through the upper end cover 1 and the intake passage of the piston 27, enters the exhaust passage through the exhaust port 32, and is discharged to the device that needs gas input through the exhaust passage.

[0052] When the valve core 31 contacts the piston 27, the intake passage and the exhaust port 32 are disconnected. At this time, the gas can enter the exhaust port 32 through the compensation passage 33 and then enter the exhaust passage, and is discharged through the outlet passage to the device that needs gas input.

[0053] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A shut-off shaft valve with flow compensation function, comprising: Upper end cover (1), lower end cover (3), and valve body disposed between the upper end cover (1) and the lower end cover (3); The valve body is characterized in that it includes a valve body annular shell (21) disposed between the upper end cover (1) and the lower end cover (3), and a piston (27) disposed within the annular shell; The lower end cover (3) is provided with a valve core (31) that abuts against the piston (27), and a compensation air passage (33) is opened on the side of the lower end cover (3); The valve core (31) is provided with a sealing ring, and has multiple exhaust ports (32) on its periphery and an exhaust passage communicating with the multiple exhaust ports (32) at its bottom; The sealing ring is located above the plurality of exhaust ports (32) and abuts against the piston (27); An air inlet is provided in the upper end cover (1) and the piston (27), and an air outlet is provided in the lower end cover (3).

2. A shut-off shaft valve with flow compensation function according to claim 1, characterized in that: There is a predetermined distance between the upper end cover (1) and the lower end cover (3); The valve body ring shell (21) connects the upper end cover (1) and the lower end cover (3), and forms an air chamber (23) with the upper end cover (1) and the lower end cover (3).

3. A shut-off shaft valve with flow compensation function according to claim 2, characterized in that: The piston (27) is provided with a push ring (22) around its periphery that is adapted to the air chamber (23).

4. A shut-off shaft valve with flow compensation function according to claim 3, characterized in that: The valve body ring shell (21) has a first air port (25) and a second air port (26) on its side; The first air port (25) extends to one end of the air chamber (23), and the second air port (26) extends to the other end of the air chamber (23).

5. A shut-off shaft valve with flow compensation function according to claim 4, characterized in that: A spring (24) is provided between the push ring (22) and the lower end cover (3).

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