A zero-friction lifting rod track control valve for sealing surface parts

Abstract

This utility model discloses a zero-friction lifting rod track control valve for sealing surface parts, including a valve body, and a valve stem installed in the valve body. A C-ball is installed on the valve stem in an installation cavity located inside the valve chamber, and a valve core is installed on the outside of the C-ball. The valve core has a mating groove on the side where it connects with the valve port, and a sealing layer is provided in the mating groove. The valve body is provided with a drive mechanism to drive the valve stem to move up and down and left and right. When the valve is opened, the C-ball moves away from the mating port, thus separating the valve core from the mating port. Then, the rotary actuator rotates 90 degrees, driving the valve stem to rotate, causing the valve core to rotate and open the valve. Throughout the process, there is no contact between the valve core and the valve body, thus achieving zero friction.

Description

Technical Field

[0001] This utility model relates to the field of valve-related technology, specifically a zero-friction lifting rod track control valve for sealing surface parts. Background Technology

[0002] Ball valves, as a common type of valve, have advantages such as compact structure, light weight, low fluid resistance and loss, and convenient maintenance and operation. They are widely used in media transportation pipelines in various fields. However, during the rotation and opening of ball valves, the valve core and valve body will generate severe friction. This can easily cause wear during long-term use, resulting in poor sealing after closure. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a zero-friction lifting rod track control valve for sealing surface parts.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model discloses a zero-friction lifting rod track control valve for sealing surface parts, comprising a valve body, a valve stem installed in the valve body, a C-ball installed on the valve stem in an installation cavity located inside the valve chamber, and a valve core installed on the outside of the C-ball; the valve core has a mating groove on the side where it connects with the valve port, and a sealing layer is provided in the mating groove; the valve body is provided with a drive mechanism to drive the valve stem to move up and down and left and right.

[0006] The valve stem includes an upper rod and a lower rod. The bottom of the C-ball is provided with a notch that mates with the top of the lower rod. The C-ball is rotatably connected to the top of the lower rod via a pin. The C-ball rotates up and down along the lower rod. The inner end of the upper rod is provided with a flip groove for the top of the C-ball to be inserted into. The end of the upper rod is provided with an inclined groove. The top of the C-ball is provided with a cylindrical pin that is inserted into the inclined groove and slides along the inclined groove.

[0007] The drive mechanism includes a linear actuator and a rotary actuator mounted on a positioning frame. The moving end of the linear actuator is equipped with a mounting base, and a drive shaft is mounted on the mounting base via a bearing. One end of the drive shaft is fixed to the valve stem, and the linear actuator drives the valve stem to move up and down. The other end of the drive shaft is provided with a key shaft, and the rotating end of the rotary actuator is equipped with a bushing for the key shaft to be inserted. An elastic element is provided between the drive shaft and the valve stem.

[0008] As a preferred technical solution of this utility model, the positioning frame is further provided with a displacement sensor for detecting the displacement of the valve stem's lifting distance, and the positioning frame is further provided with an angle sensor for detecting the rotation angle of the valve stem.

[0009] It also includes a controller, to which the displacement sensor, angle sensor, linear actuator, and rotary actuator are all connected.

[0010] As a preferred embodiment of this utility model, the elastic element includes a positioning cylinder connected to the bottom end of the transmission shaft, and the positioning cylinder has a vertically downward telescopic cavity, and the positioning cylinder has a sliding block that moves along the telescopic cavity, and the sliding block has a telescopic cylinder that extends out of the telescopic cavity, and a compression spring is provided between the sliding block and the bottom of the telescopic cavity, and the outer end of the positioning cylinder has a limiting end cap for limiting the sliding block, and the limiting end cap is welded to the positioning cylinder.

[0011] As a preferred embodiment of this utility model, the cross-section of the telescopic cavity is non-circular, and the outer contour of the sliding block is adapted to the inner contour of the telescopic cavity.

[0012] As a preferred embodiment of this utility model, a disc is installed at the end of the valve stem, the displacement sensor is fixedly installed on the positioning frame, the displacement sensor is vertically arranged and parallel to the valve stem, the detection end of the displacement sensor is provided with a vertically downward telescopic rod, the positioning frame is provided with a limiting sleeve for the telescopic rod to pass through and for vertically limiting the telescopic rod, and the bottom end of the telescopic rod is provided with a pair of mounting blocks arranged on the upper and lower sides of the disc, and rollers that contact the disc are installed on the mounting blocks.

[0013] The beneficial effects of this utility model are:

[0014] 1. This type of zero-friction lifting rod track control valve for sealing surface parts utilizes a specific connection structure between the valve stem and the C-ball. When the valve is opened, the linear actuator lifts the valve stem a set distance, moving the C-ball away from the opposite interface. This causes the valve core to separate from the opposite interface. Then, the rotary actuator rotates 90 degrees, causing the valve stem to rotate and open the valve. Throughout this process, there is no contact between the valve core and the valve body, achieving zero friction. When the valve is closed, the rotary actuator rotates 90 degrees back, causing the valve stem to rotate and engage with the opposite interface. Then, the linear actuator lowers the valve stem, causing the valve core to tilt forward and fit tightly against the valve port, thus achieving zero friction between the valve core and the valve port. Furthermore, this utility model features a unique drive mechanism to achieve the lifting and rotation of the valve stem. By using a linear actuator and a rotary actuator as power sources, the valve stem is driven to perform linear lifting and rotation, respectively, thereby realizing the lifting and rotation of the valve core. A drive shaft is included, with one end fixed to the valve stem and the linear actuator driving the valve stem to lift and lower. The other end of the drive shaft is equipped with a key shaft, and the rotating end of the rotary actuator is fitted with a bushing for inserting the key shaft. This ensures that the linear and rotary movements do not interfere with each other, and by setting an angle transmission... The sensor detects the rotation angle of the valve stem, and the displacement sensor detects the displacement of the valve stem's lifting distance. When the valve is opened, the linear actuator drives the valve stem to rise a set distance, and then the rotary actuator rotates 90 degrees, causing the valve stem to rotate and open the valve. When the valve is closed, the rotary actuator first rotates 90 degrees back, causing the valve stem to rotate and close the valve. Then the linear actuator drives the valve stem to descend, causing the valve stem to tilt forward and fit tightly against the valve body. This ensures a good sealing effect after the valve stem is closed, and the system is simple in structure and easy to control.

[0015] 2. This type of zero-friction lifting rod track control valve for sealing surface parts incorporates an elastic element between the drive shaft and the valve stem, with specific constraints on the elastic element. The cross-section of the telescopic cavity is non-circular, and the outer contour of the sliding block matches the inner contour of the telescopic cavity. This allows the sliding block to extend and retract linearly along the telescopic cavity without rotation. Under the elastic action of the compression spring, the sliding block is located at the outermost end. When the drive shaft pushes the valve stem down, the valve core aligns with the valve port. Further downward pressure causes the compression spring to contract further, resulting in tight contact between the valve core and the valve port, thus achieving a high sealing effect. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of a zero-friction lifting rod track control valve for sealing surface parts according to this utility model;

[0018] Figure 2 This is a schematic diagram of the installation of a displacement sensor for a zero-friction lifting rod track control valve for a sealing surface part according to this utility model;

[0019] Figure 3 This is a schematic diagram of the drive shaft installation of a zero-friction lifting rod track control valve for a sealing surface part according to this utility model;

[0020] Figure 4 This is a schematic diagram of the valve stem of a zero-friction lifting rod track control valve for sealing surface parts according to this utility model;

[0021] Figure 5 This is a schematic diagram of the elastic component of a zero-friction lifting rod track control valve for sealing surface parts according to this utility model.

[0022] In the diagram: 1. Valve body; 2. Valve stem; 201. Upper stem; 202. Lower stem; 203. Notch; 204. Pin; 205. Tilting groove; 206. Inclined groove; 207. Cylindrical pin; 3. C-ball; 4. Valve core; 5. Connecting groove; 6. Linear actuator; 7. Rotary actuator; 8. Mounting base; 9. Drive shaft; 10. Key shaft; 11. Bushing; 12. Displacement sensor; 13. Angle sensor; 14. Controller; 15. Elastic element; 16. Positioning cylinder; 17. Telescopic cavity; 18. Sliding block; 19. Telescopic cylinder; 20. Compression spring; 21. Limiting end cap; 22. Disc; 23. Telescopic rod; 24. Limiting sleeve; 25. Mounting block; 26. Roller. Detailed Implementation

[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] Example: Figure 1-5 As shown, this utility model discloses a zero-friction lifting rod track control valve for sealing surface parts, comprising a valve body 1, and a valve stem 2 installed inside the valve body 1. A C-ball 3 is installed on the valve stem 2 in an installation cavity located inside the valve chamber, and a valve core 4 is installed on the outside of the C-ball 3. The valve core 4 has a docking groove 5 on the side where it docks with the valve port, and a sealing layer is provided in the docking groove 5. The valve body 1 is provided with a drive mechanism that drives the valve stem 2 to move up and down and left and right.

[0025] The connection relationship between valve stem 2 and ball C 3 is disclosed below. The main body of the lifting rod track control valve has been applied for in a relevant patent. This application is an improvement on the valve stem control part. For ease of understanding, the connection relationship between valve stem 2 and ball C 3 will be described again.

[0026] The valve stem 2 includes an upper stem 201 and a lower stem 202. The bottom of the C-ball 3 is provided with a notch 203 that mates with the top of the lower stem 202. The C-ball 3 is rotatably connected to the top of the lower stem 202 via a pin 204. The C-ball 3 rotates up and down along the lower stem 202. The inner end of the upper stem 201 is provided with a flip groove 205 for the top of the C-ball 3 to be inserted. The end of the upper stem 201 is provided with a sloping groove 206. The top of the C-ball 3 is provided with a cylindrical pin 207 that is inserted into the sloping groove 206 and slides along the sloping groove 206. The rotation of the upper valve stem drives the C-ball to rotate, which in turn drives the valve core to rotate, thus achieving the function of opening and closing. A cylindrical pin 207 is provided at the top of the C-ball, which is inserted into the inclined groove 206 and slides along the inclined groove 206. The C-ball rotates up and down along the lower valve stem. After the valve core is closed, the upper valve stem can be pressed down further, so that the cylindrical pin 207 moves along the inclined groove 206, thus pushing the valve core forward and pressing it against the valve seat in a parallel fit, thereby achieving a good sealing effect and preventing leakage.

[0027] The upper rod 201 rotates and moves up and down along the upper mounting port. A sealing mechanism is provided between the upper rod and the upper mounting port to seal the connection. The sealing mechanism is a specific existing sealing mechanism disclosed in a related lifting rod track valve.

[0028] The drive mechanism includes a linear actuator 6 and a rotary actuator 7 mounted on a positioning frame. The moving end of the linear actuator 6 is equipped with a mounting base 8, and a drive shaft 9 is mounted on the mounting base 8 via a bearing. One end of the drive shaft 9 is fixed to the valve stem 2, and the linear actuator 6 drives the valve stem 2 to move up and down. The other end of the drive shaft 9 is provided with a key shaft 10, and the rotating end of the rotary actuator 7 is equipped with a bushing 11 for the key shaft 10 to be inserted. An elastic element 15 is provided between the drive shaft 9 and the valve stem 2.

[0029] By setting up a linear actuator 6 and a rotary actuator 7, which are used as power sources, the valve stem 2 is driven to perform linear lifting and rotation, respectively, thereby realizing the lifting and rotation of the valve core 4. A drive shaft 9 is connected to the valve stem 2 at one end, and the linear actuator 6 drives the valve stem 2 to lift and lower. A key shaft 10 is provided at the other end of the drive shaft 9, and a bushing 11 for inserting the key shaft 10 is installed at the rotating end of the rotary actuator 7. This ensures that the linear and rotary movements do not interfere with each other. Furthermore, an angle sensor 13 is used to detect the rotation angle of the valve stem 2. The displacement sensor 12 is set to detect the displacement of the valve stem 2. When the valve is opened, the linear actuator 6 drives the valve stem 2 to rise a set distance. Then, the rotary actuator 7 rotates 90 degrees to drive the valve stem 2 to rotate, so that the valve core 4 rotates to open the valve. When the valve is closed, the rotary actuator 7 first rotates 90 degrees back to drive the valve stem 2 to rotate, so that the valve core 4 rotates to close the valve. Then, the linear actuator 6 drives the valve stem 2 to fall, so that the valve core 4 tilts forward and fits tightly against the valve body 1. This allows the valve core 4 to have a good sealing effect after closing, and it has the characteristics of simple structure and easy control.

[0030] The positioning frame is also equipped with a displacement sensor 12 for detecting the displacement of the valve stem 2 by lifting distance, and an angle sensor 13 for detecting the rotation angle of the valve stem 2; it also includes a controller 14, and the displacement sensor 12, angle sensor 13, linear actuator 6 and rotary actuator 7 are all connected to the controller 14.

[0031] In this embodiment, the linear actuator 6 is a linear cylinder, and the rotary actuator is a rotary cylinder. The mounting bracket is provided with a compression drive mechanism for supplying air to the linear cylinder and the rotary cylinder. The compression drive mechanism is connected to the controller, and the controller controls the linear cylinder and the rotary cylinder to move by controlling the compression drive mechanism. In the process of display manufacturing, other types of linear actuators and rotary actuators can be rotated.

[0032] When opening the valve, the linear actuator moves the valve stem to rise a set distance, and then the rotary actuator rotates 90 degrees to rotate the valve stem, causing the valve core to rotate and open the valve. When closing the valve, the rotary actuator first rotates 90 degrees back to rotate the valve stem, causing the valve core to rotate and close the valve. Then the linear actuator moves the valve stem down, causing the valve core to tilt forward and fit tightly against the valve port, thus ensuring a good seal between the valve core and the valve port.

[0033] The elastic element 15 includes a positioning cylinder 16 connected to the bottom end of the transmission shaft 9. The positioning cylinder 16 has a vertically downward telescopic cavity 17, and a sliding block 18 that moves along the telescopic cavity 17 is provided inside the positioning cylinder 16. The sliding block 18 has a telescopic cylinder 19 extending out of the telescopic cavity 17. A compression spring 20 is provided between the sliding block 18 and the bottom of the telescopic cavity 17. The outer end of the positioning cylinder 16 has a limiting end cap 21 for limiting the sliding block 18. The limiting end cap 21 and the positioning cylinder 16... 6. Welding: The cross-section of the telescopic cavity 17 is not circular, and the outer contour of the sliding block 18 is adapted to the inner contour of the telescopic cavity 17. In this way, the sliding block 18 can extend and retract linearly along the telescopic cavity 17 without rotation. Under the elastic action of the compression spring 20, the sliding block 18 is located at the outermost end. When the transmission shaft 9 drives the valve stem 2 to press down, the valve core 4 is connected to the valve port. Then, when it is pressed down further, the compression spring 20 is further contracted, so that the valve core 4 and the valve port are in close contact, thereby achieving a high sealing effect.

[0034] The valve stem 2 has a disc 22 installed at its end. The displacement sensor 12 is fixedly installed on the positioning frame and is vertically arranged and parallel to the valve stem 2. The detection end of the displacement sensor 12 is provided with a vertically downward telescopic rod 23. The positioning frame is provided with a limiting sleeve 24 for the telescopic rod 23 to pass through and for vertically limiting the telescopic rod 23. The bottom end of the telescopic rod 23 is provided with a pair of mounting blocks 25 arranged on the upper and lower sides of the disc 22. The mounting blocks 25 are equipped with rollers 26 that contact the disc 22. Driven by the linear actuator 6, the valve stem 2 moves up and down. At this time, the valve stem 2 drives the disc 22 to rise and fall. Since the disc 22 is set between the mounting blocks 25, the rise and fall of the disc 22 causes the telescopic rod 23 to rise and fall. Since the top of the telescopic rod 23 is connected to the detection end of the displacement sensor 12, the rise and fall height of the telescopic rod 23 can be detected, thereby detecting the rise and fall height of the valve stem 2. The disc 22 is equipped with rollers 26 between it and the mounting blocks 25, so that when the valve stem 2 rotates, it will not cause the mounting blocks 25 to move.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A zero-friction lifting rod track control valve for sealing surface parts, comprising a valve body (1), wherein a valve stem (2) is installed inside the valve body (1), a C-ball (3) is installed on the valve stem (2) in an installation cavity located inside the valve chamber, and a valve core (4) is installed on the outside of the C-ball (3); characterized in that, The valve core (4) is provided with a docking groove (5) on the side where the valve port is docked, and a sealing layer is provided in the docking groove (5); the valve body (1) is provided with a drive mechanism that drives the valve stem (2) to move up and down and left and right. The valve stem (2) includes an upper rod (201) and a lower rod (202). The bottom of the C ball (3) is provided with a notch (203) that mates with the top of the lower rod (202). The C ball (3) is rotatably connected to the top of the lower rod (202) via a pin (204). The C ball (3) rotates up and down along the lower rod (202). The inner end of the upper rod (201) is provided with a flip groove (205) for the top of the C ball (3) to be inserted. The end of the upper rod (201) is provided with a sloping groove (206). The top of the C ball (3) is provided with a cylindrical pin (207) that is inserted into the sloping groove (206) and slides along the sloping groove (206). The drive mechanism includes a linear actuator (6) and a rotary actuator (7) mounted on a positioning frame. The moving end of the linear actuator (6) is equipped with a mounting base (8), and a drive shaft (9) is mounted on the mounting base (8) via a bearing. One end of the drive shaft (9) is fixed to the valve stem (2), and the linear actuator (6) drives the valve stem (2) to move up and down. The other end of the drive shaft (9) is provided with a key shaft (10), and the rotating end of the rotary actuator (7) is equipped with a bushing (11) for the key shaft (10) to be inserted. An elastic element (15) is provided between the drive shaft (9) and the valve stem (2).

2. The zero-friction lifting rod track control valve for sealing surface parts according to claim 1, characterized in that, The positioning frame is also equipped with a displacement sensor (12) for detecting the displacement of the valve stem (2) lifting distance, and an angle sensor (13) for detecting the rotation angle of the valve stem (2). It also includes a controller (14), and the displacement sensor (12), angle sensor (13), linear actuator (6) and rotary actuator (7) are all connected to the controller (14).

3. The zero-friction lifting rod track control valve for sealing surface parts according to claim 1, characterized in that, The elastic element (15) includes a positioning cylinder (16) connected to the bottom end of the transmission shaft (9), and the positioning cylinder (16) is provided with a vertically downward telescopic cavity (17), and the positioning cylinder (16) is provided with a sliding block (18) that moves along the telescopic cavity (17), and the sliding block (18) is provided with a telescopic cylinder (19) that extends out of the telescopic cavity (17), and a compression spring (20) is provided between the sliding block (18) and the bottom of the telescopic cavity (17), and the outer end of the positioning cylinder (16) is provided with a limiting end cap (21) for limiting the sliding block (18), and the limiting end cap (21) is welded to the positioning cylinder (16).

4. The zero-friction lifting rod track control valve for sealing surface parts according to claim 3, characterized in that, The cross-section of the telescopic cavity (17) is not circular, and the outer contour of the sliding block (18) is adapted to the inner contour of the telescopic cavity (17).

5. A zero-friction lifting rod track control valve for sealing surface parts according to claim 2, characterized in that, A disc (22) is installed at the end of the valve stem (2). The displacement sensor (12) is fixedly installed on the positioning frame. The displacement sensor (12) is vertically arranged and parallel to the valve stem (2). The detection end of the displacement sensor (12) is provided with a vertically downward telescopic rod (23). The positioning frame is provided with a limiting sleeve (24) for the telescopic rod (23) to pass through and for vertically limiting the telescopic rod (23). The bottom end of the telescopic rod (23) is provided with a pair of mounting blocks (25) arranged on the upper and lower sides of the disc (22). The mounting blocks (25) are equipped with rollers (26) that contact the disc (22).

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