Pneumatic angle seat valve

Abstract

This utility model belongs to the field of angle seat valve technology, and particularly relates to a pneumatic angle seat valve, comprising: a valve body having a connected inlet flow channel and an outlet flow channel; a valve seat including a first groove, a first flow channel, a second groove, and a first filter screen, the first groove and the second groove being respectively disposed at both ends of the valve seat, the first flow channel connecting the first groove and the second groove, and the first filter screen disposed on the first flow channel; a valve core disposed in the valve body for abutting against the first groove, including a second flow channel and a second filter screen, the second flow channel being disposed at the end of the valve core near the valve seat, and the second filter screen being disposed on the second flow channel; a valve stem movably disposed in the valve body and connected to the valve core; and a pneumatic actuator for driving the valve stem to move. The beneficial effect of this utility model is that while ensuring fluid flow through the valve body, it can also provide a dual filtration effect on impurities in the fluid, preventing impurities from remaining between the valve core and the valve seat and causing valve malfunction.

Description

Technical Field

[0001] This utility model belongs to the field of angle seat valve technology, and in particular relates to a pneumatic angle seat valve. Background Technology

[0002] Angle seat valves are directional valves controlled by a single-acting pneumatic actuator with spring safety protection. They are pneumatically operated for opening and closing and are mainly used in industrial automation fluid control, food processing, and humidity sterilizers. Depending on the operating conditions, these valves are available in normally open or normally closed types, suitable for gas, liquid, and steam flow control, and are characterized by their sensitive response and precise operation.

[0003] In existing technologies, most pneumatic angle seat valves do not have filtration capabilities. When the fluid passing through the angle seat valve contains large impurity particles, these particles may cause the valve core to jam, the valve to malfunction, or damage the valve core sealing surface, thus requiring the angle seat valve to be shut down for cleaning and maintenance, affecting production efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a pneumatic angle seat valve to address the aforementioned technical problems.

[0005] In view of this, the present invention provides a pneumatic angle seat valve, comprising: The valve body has a connected inlet and outlet flow channels. A valve seat is disposed within a valve body. The valve seat includes a first groove, a first flow channel, a second groove, and a first filter screen. The first groove and the second groove are respectively disposed at both ends of the valve seat. The first flow channel is used to connect the first groove and the second groove. The first filter screen is disposed on the first flow channel. The valve core is disposed in the valve body to abut against the first groove. The valve core includes a second flow channel and a second filter screen. The second flow channel is disposed on the end of the valve core near the valve seat to communicate with the first flow channel. The second filter screen is disposed on the second flow channel. The valve stem is movably disposed within the valve body and connected to the valve core; A pneumatic actuator is mounted on the valve body and is used to drive the valve stem to move.

[0006] Furthermore, the valve core includes: The abutment block is adapted to the structure of the first groove and is used to insert into and abut against the bottom of the first groove; A connecting cylinder is disposed on the abutment block and is adapted to be inserted into the first flow channel, and a second flow channel is formed inside the connecting cylinder; The second filter screen is located on the connecting cylinder.

[0007] Furthermore, it also includes a first seal, which is disposed on the abutment block for contacting the bottom of the first groove.

[0008] Furthermore, it also includes a second seal, which is disposed on the periphery of the abutment block for contacting the sidewall of the first groove.

[0009] Furthermore, the pneumatic actuator includes: The housing has a ventilation chamber, a first ventilation port, and a second ventilation port inside. A slider is movably disposed within the venting chamber and connected to the valve stem; The slider divides the ventilation chamber into a first chamber and a second chamber. The first vent is connected to the first chamber, and the second vent is connected to the second chamber.

[0010] Furthermore, the pneumatic actuator also includes a return spring, which is disposed in the second chamber and its two ends abut against the slider and the housing, respectively.

[0011] The beneficial effects of this utility model are: when the pneumatic angle seat valve is in operation, it can ensure the fluid flows through the valve body while also playing a dual filtration role for impurities in the fluid, filtering out impurities in the inlet flow channel and preventing impurities from remaining between the valve core and the valve seat, thus preventing valve malfunction. It is highly practical. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a utility model Figure 2 Enlarged structural diagram at point A; The markings in the diagram represent: 1. Valve body; 11. Inlet channel; 12. Outlet channel; 2. Valve seat; 21. First groove; 22. First channel; 23. Second groove; 24. First filter screen; 3. Valve core; 31. Second channel; 32. Second filter screen; 33. Abutment block; 34. Connecting cylinder; 35. First seal; 36. Second seal; 4. Valve stem; 5. Pneumatic actuator; 51. Housing; 52. Vent chamber; 53. First vent; 54. Second vent; 55. Slider; 56. Return spring. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0015] Example 1:

[0016] This embodiment provides a pneumatic angle seat valve, including: Valve body 1, with an inlet flow channel 11 and an outlet flow channel 12 connected inside the valve body 1; Valve seat 2 is disposed inside valve body 1. Valve seat 2 includes a first groove 21, a first flow channel 22, a second groove 23 and a first filter screen 24. The first groove 21 and the second groove 23 are respectively disposed at both ends of valve seat 2. The first flow channel 22 is used to connect the first groove 21 and the second groove 23. The first filter screen 24 is disposed on the first flow channel 22. Valve core 3 is disposed inside valve body 1 to abut against first groove 21. Valve core 3 includes second flow channel 31 and second filter screen 32. Second flow channel 31 is disposed on the end of valve core 3 near valve seat 2 to communicate with first flow channel 22. Second filter screen 32 is disposed on second flow channel 31. Valve stem 4 is movably disposed within valve body 1 and connected to valve core 3; Pneumatic actuator 5 is mounted on valve body 1 and is used to drive valve stem 4 to move.

[0017] In this technical solution, when the pneumatic angle seat valve is in operation, the valve stem 4 is moved by the pneumatic actuator 5 to drive the valve core 3 to move, so that the valve core 3 moves closer to the valve seat 2 or moves away from the valve seat 2, thereby realizing the closing or opening of the valve.

[0018] The valve core 3 consists of an abutment block 33 and a connecting cylinder 34. One end of the abutment block 33 is integrally connected to the valve stem 4, and the connecting cylinder 34 is integrally connected to the other end of the abutment block 33. A second filter screen 32 is provided in the connecting cylinder 34, and the internal cavity of the connecting cylinder 34 is a second flow channel 31. The second flow channel 31 is connected to the outside of the connecting cylinder 34 through the second filter screen 32.

[0019] A first groove 21 is provided on the end face of the valve seat 2 near the valve core 3. The shape of the first groove 21 is adapted to the structure of the abutment block 33. A cylindrical first flow channel 22 is provided at the bottom of the first groove 21. A second groove 23 is provided on the end face of the valve seat 2 away from the valve core 3. The second groove 23 has a cylindrical structure and is located outside the first flow channel 22. The second groove 23 and the first flow channel 22 are in communication. A first filter screen 24 is provided on the first flow channel 22.

[0020] When the abutting block 33 of the valve core 3 is located in and abuts against the first groove 21 of the valve seat 2, and the connecting cylinder 34 is located in the first flow channel 22, the connection between the inlet flow channel 11 and the outlet flow channel 12 is cut off, so that the fluid can no longer pass through the valve body 1, thereby closing the pneumatic angle seat valve. When the abutting block 33 of the valve core 3 moves out of the first groove 21, the connecting cylinder 34 also moves out of the first flow channel 22, keeping the first flow channel 22 and the second flow channel 31 connected. At this time, the fluid can first flow into the second groove 23 from the inlet flow channel 11, then enter the first flow channel 22 through the first filter screen 24, then flow into the second flow channel 31 from the first flow channel 22, then enter the first groove 21 through the second filter screen 32, and finally be discharged through the outlet flow channel 12, thereby opening the pneumatic angle seat valve. In addition, it is worth noting that the length of the connecting cylinder 34 and the depth of the first flow channel 22 are adapted to meet actual needs. When the pneumatic actuator 5 controls the valve stem 4 to move the valve core 3 away from the valve seat 2 to open the valve, the connecting cylinder 34 will not completely move out of the first flow channel 22, so as to ensure that the fluid flowing out of the first flow channel 22 will enter the second flow channel 31 and then be discharged through the second filter screen 32.

[0021] In summary, when the pneumatic angle seat valve is in operation, it not only ensures the flow of fluid through the valve body 1, but also plays a dual filtering role for impurities in the fluid, filtering out impurities in the inlet flow channel 11 and preventing impurities from remaining between the valve core 3 and the valve seat 2, which could cause valve malfunction. It is highly practical.

[0022] Example 2:

[0023] This embodiment provides a pneumatic angle seat valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0024] Furthermore, it also includes a first seal 35, which is disposed on the abutment block 33 for contacting the bottom of the first groove 21.

[0025] Furthermore, it also includes a second seal 36, which is disposed on the periphery of the abutment block 33 for contacting the sidewall of the first groove 21.

[0026] In this technical solution, the first sealing element 35 and the second sealing element 36 can be sealing rings made of rubber. The first sealing element 35 is disposed on the end face of the abutment block 33 that contacts the bottom of the first groove 21, thereby enhancing the sealing performance between the abutment block 33 and the first groove 21. The second sealing element 36 is disposed on the circumferential side of the abutment block 33 that contacts the inner wall of the first groove 21, thereby providing a sealing effect between the circumferential side of the abutment block 33 and the inner wall of the first groove 21, achieving a double sealing effect. This effectively ensures that no fluid leakage occurs when the valve is closed, demonstrating high practicality.

[0027] Example 3:

[0028] This embodiment provides a pneumatic angle seat valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0029] Furthermore, the pneumatic actuator 5 includes: The housing 51 has a ventilation chamber 52, a first ventilation port 53, and a second ventilation port 54 inside the housing 51. Slider 55 is movably disposed within the venting chamber 52 and connected to the valve stem 4; The slider 55 divides the ventilation chamber 52 into a first chamber and a second chamber. The first vent 53 is connected to the first chamber, and the second vent 54 is connected to the second chamber.

[0030] In this technical solution, an external air source can push the slider 55 to move through the first air port 53 and the second air port 54, thereby driving the valve stem 4 to move, which in turn causes the valve core 3 to move closer to and further away from the valve seat 2, thus realizing the opening and closing of the pneumatic angle seat valve.

[0031] Furthermore, the pneumatic actuator 5 also includes a return spring 56, which is disposed in the second chamber and abuts against the slider 55 and the housing 51 at both ends, respectively. By providing the return spring 56, the elastic restoring force can push the valve core 3 to move and reset more quickly, keeping the valve in the closed state, thereby achieving rapid and precise valve shut-off. The embodiments of this application have been described above with reference to the accompanying drawings. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many forms under the guidance of this application without departing from the spirit and scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A pneumatic angle seat valve, characterized in that, include: Valve body (1), wherein a liquid inlet channel (11) and a liquid outlet channel (12) are provided inside the valve body (1). Valve seat (2), the valve seat (2) is disposed in the valve body (1), the valve seat (2) includes a first groove (21), a first flow channel (22), a second groove (23) and a first filter screen (24), the first groove (21) and the second groove (23) are respectively disposed at both ends of the valve seat (2), the first flow channel (22) is used to connect the first groove (21) and the second groove (23), and the first filter screen (24) is disposed on the first flow channel (22); Valve core (3), the valve core (3) is disposed in the valve body (1) for abutting the first groove (21), the valve core (3) includes a second flow channel (31) and a second filter screen (32), the second flow channel (31) is disposed on the end of the valve core (3) near the valve seat (2) for communicating with the first flow channel (22), and the second filter screen (32) is disposed on the second flow channel (31); Valve stem (4), which is movably disposed within valve body (1) and connected to valve core (3); A pneumatic actuator (5) is mounted on the valve body (1) and is used to drive the valve stem (4) to move.

2. A pneumatic angle seat valve according to claim 1, characterized in that, The valve core (3) includes: Abutting block (33) is adapted to the structure of the first groove (21) and is used to insert into and abut against the bottom of the first groove (21); A connecting cylinder (34) is disposed on the abutment block (33) and is adapted to be inserted into the first flow channel (22), and the second flow channel (31) is formed inside the connecting cylinder (34); The second filter (32) is disposed on the connecting cylinder (34).

3. A pneumatic angle seat valve according to claim 2, characterized in that, It also includes a first seal (35) disposed on the abutment block (33) for contacting the bottom of the first groove (21).

4. A pneumatic angle seat valve according to claim 3, characterized in that, It also includes a second seal (36), which is disposed on the periphery of the abutment block (33) for contacting the sidewall of the first groove (21).

5. A pneumatic angle seat valve according to claim 1, characterized in that, The pneumatic actuator (5) includes: The housing (51) is provided with a ventilation chamber (52), a first ventilation port (53) and a second ventilation port (54); A slider (55) is movably disposed in the ventilation chamber (52) and connected to the valve stem (4); The slider (55) divides the ventilation chamber (52) into a first chamber and a second chamber. The first ventilation port (53) is connected to the first chamber, and the second ventilation port (54) is connected to the second chamber.

6. A pneumatic angle seat valve according to claim 5, characterized in that, The pneumatic actuator (5) also includes a return spring (56), which is disposed in the second chamber and its two ends abut against the slider (55) and the housing (51) respectively.

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