Switching structure of valve and pneumatic actuator

Abstract

The utility model relates to a switching structure of a valve and a pneumatic actuator, which comprises a valve main body, a ball valve, a switching box and the pneumatic actuator, the switching box comprises an upper cover and a mounting seat which are connected with each other, and a shaft sleeve, a middle rotating shaft and a transmission shaft which are rotationally connected between the upper cover and the mounting seat; when the output end of the pneumatic actuator rotates, the valve rod is controlled to rotate through the transmission shaft, the transfer shaft and the shaft sleeve in sequence, so that the ball valve is automatically controlled to be opened or closed, the pneumatic actuator is mounted far away from the valve body through the transfer box, interference between the pneumatic actuator and the valve body is avoided, and the safety of the ball valve is improved. The mounting difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of actuators, in particular to a switching structure between a valve and a pneumatic actuator. Background Art

[0002] A pneumatic actuator is an actuator that uses air pressure to drive opening and closing. It is usually used in conjunction with a ball valve to automatically adjust the flow of the medium. The control end of the ball valve is usually perpendicular to the direction of liquid flow, and the pneumatic actuator is also installed at the control end. This also makes it possible for the larger pneumatic actuator to be installed with the valve parts downstream of the ball valve, resulting in the pneumatic actuator being unable to be installed normally. To solve this problem, it is usually considered to extend the pipe at one end of the ball valve, or to add a transfer pipe between the ball valve and the valve parts. The former requires re-customization of the ball valve size and is more expensive, and the latter has more installation surfaces and increases the risk of leakage. Summary of the Invention

[0003] In order to overcome the shortcomings of the background technology, the technical solution adopted by the present invention is a transfer structure between a valve and a pneumatic actuator, including a valve body, a ball valve, an adapter box and a pneumatic actuator. The output end of the valve body is connected to the ball valve, the ball valve is provided with a liquid inlet end for an external pipeline, the ball valve is provided with a valve stem for controlling the opening or closing of the ball valve, and the valve stem is connected to the pneumatic actuator through the adapter box. The adapter box includes a connected upper cover and a mounting seat, and a shaft sleeve, a rotating shaft and a transmission shaft rotatably connected between the upper cover and the mounting seat. The shaft sleeve, the rotating shaft and the transmission shaft are all provided with gears, and the shaft sleeve is meshed with the rotating shaft and the transmission shaft in sequence through gears. The shaft sleeve is provided with a mounting groove for connecting the ball valve, and the transmission shaft is provided with a polygonal column for an external pneumatic actuator.

[0004] By adopting the above technical solution, when the output end of the pneumatic actuator rotates, the valve stem is controlled to rotate in sequence through the transmission shaft, the intermediate shaft, and the shaft sleeve, thereby realizing automatic control of the opening or closing of the ball valve. The installation position of the pneumatic actuator is moved away from the valve body through the adapter box, avoiding interference between the pneumatic actuator and the valve body and reducing the difficulty of installation.

[0005] The utility model is further configured such that the outer side of the valve body is wrapped with an insulation layer, the insulation layer is provided with an open groove at the output end of the valve body, the ball valve is connected to the valve body through the open groove, and the valve stem is arranged in the open groove, and the valve stem is connected to the pneumatic actuator through an adapter box.

[0006] This technical solution is the application of the utility model to the insulation type valve body. The side projection area of ​​the adapter box is much smaller than the side projection area of ​​the pneumatic actuator, so that the opening groove only needs to accommodate the ball valve and the adapter box, reducing the size of the opening groove, reducing the heat loss of the medium in the valve body, and improving the insulation effect.

[0007] The utility model is further configured as follows: the ball valve includes a left valve body, a right valve body, a ball, a valve stem, a sealing assembly and a bracket. The left valve body and the right valve body are arranged on both sides of the ball, and the left valve body and the right valve body are combined to form a control end for placing the sealing assembly. The control end is connected to the adapter box through the bracket, one end of the valve stem is connected to the ball, and the other end passes through the bracket and is clamped in the mounting groove.

[0008] Furthermore, a bushing is provided between the ball and the left valve body / right valve body, and the sealing assembly includes a positioning sleeve, and a V-shaped packing, an upper pressure sleeve, a disc spring and a lower pressure sleeve which are sequentially mounted on the valve stem from top to bottom. The positioning sleeve is arranged between the bracket and the bushing, and the V-shaped packing is arranged between the positioning sleeve and the valve stem, and the lower pressure sleeve abuts against the adapter box.

[0009] Furthermore, a quadrangular prism is provided at one end of the valve stem, the mounting groove is a rectangular groove corresponding to the quadrangular prism, and the bracket is provided with mounting holes for connecting to the mounting seat around the quadrangular prism.

[0010] By adopting the above technical solution, the adapter box is connected to the bracket through the mounting hole thread, so that the sealing assembly is arranged between the valve and the adapter box. The bracket presses the positioning sleeve tightly against the bushing to prevent the bushing from separating from the left valve body / right valve body when the ball rotates. The adapter box squeezes the lower pressure sleeve, so that the lower pressure sleeve squeezes the upper pressure sleeve and the V-shaped packing piece through the disc spring, causing the V-shaped packing piece to deform and fill the gap, thereby improving the sealing effect of the connection between the valve stem and the control end.

[0011] The present invention is further configured such that the transmission ratio between the shaft sleeve and the transmission shaft is 1:1, and the number of gear teeth on the shaft sleeve and the transmission shaft is the same, so that the pneumatic actuator maintains a 90° rotation action without the need for adjustment, thereby improving convenience.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] When the output end of the pneumatic actuator rotates, the valve stem is controlled to rotate in sequence through the transmission shaft, transfer shaft, and sleeve, thereby automatically controlling the opening or closing of the ball valve. The adapter box allows the installation position of the pneumatic actuator to be away from the valve body, avoiding interference between the pneumatic actuator and the valve body and reducing the difficulty of installation.

[0014] The embodiments of the present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the main view of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 For the utility model Figure 2 A partial enlarged view of the A-direction view;

[0018] Figure 4 This is a bottom view of the ball valve of the present utility model;

[0019] Figure 5 A three-dimensional diagram of the adapter box of the present invention;

[0020] Figure 6 For the utility model Figure 3 A partial enlarged view of the sealing component in the B-direction view;

[0021] Among them: 1-valve body, 2-ball valve, 3-adapter box, 4-pneumatic actuator, 5-insulation layer, 11-opening groove, 21-liquid inlet end, 22-control end, 23-valve stem, 24-left valve body, 25-right valve body, 26-ball, 27-sealing assembly, 28-bracket, 29-bushing, 31-upper cover, 32-mounting seat, 33-shaft sleeve, 34-intermediate shaft, 35-drive shaft, 36-gear, 37-mounting groove, 38-polygonal column, 271-positioning sleeve, 272-V-type packing, 273-upper pressure sleeve, 274-disc spring, 275-lower pressure sleeve, 281-mounting hole; DETAILED DESCRIPTION

[0022] like Figure 1-3 As shown, this embodiment provides a connection structure between a valve and a pneumatic actuator, including a valve body 1, a ball valve 2, an adapter box 3 and a pneumatic actuator 4, the output end of the valve body 1 is connected to the ball valve 2, the ball valve 2 is provided with a liquid inlet end 21 for an external pipeline, the ball valve 2 is provided with a valve stem 23 for controlling the opening or closing of the ball valve 2, and the valve stem 23 is connected to the pneumatic actuator 4 through the adapter box 3, the adapter box 3 includes a connected upper cover 31 and a mounting seat 32, and a shaft sleeve 33, a rotating shaft 34 and a transmission shaft 35 rotatably connected between the upper cover 31 and the mounting seat 32 through a bearing, the shaft sleeve 33, the rotating shaft 34 and the transmission shaft 35 are all provided with a gear 36, and the shaft sleeve 33 is meshed with the rotating shaft 34 and the transmission shaft 35 in sequence through the gear 36, the shaft sleeve 33 is provided with a mounting groove 37 for connecting the ball valve 2, and the transmission shaft 35 is provided with a polygonal prism 38 for externally connecting to the pneumatic actuator 4.

[0023] In this embodiment, the outside of the valve body 1 is wrapped with an insulation layer 5, and the insulation layer 5 is provided with an open groove 11 at the output end of the valve body 1. The ball valve 2 is connected to the valve body 1 through the open groove 11, and the valve stem 23 is arranged in the open groove 11. The valve stem 23 is connected to the pneumatic actuator 4 through the adapter box 3. The side projection area of ​​the adapter box 3 is much smaller than the side projection area of ​​the pneumatic actuator 4, so that the open groove 11 only needs to accommodate the ball valve 2 and the adapter box 3, reducing the size of the open groove 11, reducing the heat loss of the medium in the valve body 1, and improving the insulation effect.

[0024] Combine Figure 4-6 As shown, in this embodiment, the ball valve 2 includes a left valve body 24, a right valve body 25, a ball 26, a valve stem 23, a sealing assembly 27 and a bracket 28. The left valve body 24 and the right valve body 25 are fixedly connected by bolts and are arranged on both sides of the ball 26. The left valve body 24 and the right valve body 25 are combined to form a control end 22 for placing the sealing assembly 27. The control end 22 is fixedly connected to the bracket 28 by screws, and the bracket 28 is connected to the adapter box 3 by screws. One end of the valve stem 23 is pin-connected to the ball 26, and the other end passes through the bracket 28 and is clamped in the mounting groove 37. A bushing 29 is provided between the ball 26 and the left valve body 24 / right valve body 25. The sealing assembly 27 includes a positioning sleeve 271, and The V-shaped packing 272, the upper pressure sleeve 273, the disc spring 274 and the lower pressure sleeve 275 are sequentially sleeved on the valve stem 23. The positioning sleeve 271 is arranged between the bracket 28 and the bushing 29, and the V-shaped packing 272 is arranged between the positioning sleeve 271 and the valve stem 23. The lower pressure sleeve 275 abuts against the adapter box 3. A quadrangular prism is provided at one end of the valve stem 23. The mounting groove 37 is a rectangular groove corresponding to the quadrangular prism. The bracket 28 is located around the quadrangular prism and is provided with mounting holes 281 for connecting the mounting seat 32. The bracket 28 is threadedly connected to the mounting seat 32 through the mounting hole 281. The number of teeth of the shaft sleeve 33 and the gear 36 on the transmission shaft 35 is the same, and the transmission ratio between the shaft sleeve 33 and the transmission shaft 35 is 1:1.

[0025] The working principle of the present utility model is that the pneumatic actuator 4 is a scotch fork type pneumatic actuator, which is connected to the pneumatic actuator 4 through an air pump and controls the rotation of the output shaft. When the output shaft of the pneumatic actuator 4 rotates, the valve stem 23 is controlled to rotate in sequence through the transmission shaft 35, the transfer shaft 34, and the shaft sleeve 33. The valve stem 23 controls the ball 26 to rotate 90° clockwise or counterclockwise, thereby automatically controlling the ball valve 2 to open or close.

[0026] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present invention.

Claims

1. A transfer structure between a valve and a pneumatic actuator, characterized in that: The invention comprises a valve body (1), a ball valve (2), an adapter box (3) and a pneumatic actuator (4), wherein the output end of the valve body (1) is connected to the ball valve (2), the ball valve (2) is provided with a liquid inlet end (21) for connecting to an external pipeline, the ball valve (2) is provided with a valve stem (23) for controlling the opening or closing of the ball valve (2), the valve stem (23) is connected to the pneumatic actuator (4) through the adapter box (3), and the adapter box (3) comprises an upper cover (31) and a mounting seat (32) connected thereto, and a valve seat (32) rotatably connected to the upper cover (31). A shaft sleeve (33), a rotating shaft (34) and a transmission shaft (35) are provided between the cover (31) and the mounting seat (32). The shaft sleeve (33), the rotating shaft (34) and the transmission shaft (35) are all provided with a gear (36). The shaft sleeve (33) is sequentially meshed and connected with the rotating shaft (34) and the transmission shaft (35) through the gear (36). The shaft sleeve (33) is provided with a mounting groove (37) for connecting to the ball valve (2). The transmission shaft (35) is provided with a polygonal column (38) for externally connecting to a pneumatic actuator (4).

2. The valve and pneumatic actuator adapter structure according to claim 1, characterized in that: The outer side of the valve body (1) is wrapped with an insulation layer (5), and the insulation layer (5) is provided with an opening groove (11) at the output end of the valve body (1). The ball valve (2) passes through the opening groove (11) and is connected to the valve body (1), and the valve stem (23) is provided in the opening groove (11). The valve stem (23) is connected to the pneumatic actuator (4) through the adapter box (3).

3. The valve and pneumatic actuator adapter structure according to claim 1 or 2, characterized in that: The ball valve (2) includes a left valve body (24), a right valve body (25), a ball (26), a valve stem (23), a sealing assembly (27) and a bracket (28). The left valve body (24) and the right valve body (25) are arranged on both sides of the ball (26), and the left valve body (24) and the right valve body (25) are combined to form a control end (22) for placing the sealing assembly (27). The control end (22) is connected to the adapter box (3) through the bracket (28). One end of the valve stem (23) is connected to the ball (26), and the other end passes through the bracket (28) and is clamped in the mounting groove (37).

4. The valve and pneumatic actuator adapter structure according to claim 3, characterized in that: A bushing (29) is provided between the ball (26) and the left valve body (24) / right valve body (25); the sealing assembly (27) includes a positioning sleeve (271), and a V-shaped packing member (272), an upper pressure sleeve (273), a disc spring (274) and a lower pressure sleeve (275) which are sequentially sleeved on the valve stem (23) from top to bottom; the positioning sleeve (271) is provided between the bracket (28) and the bushing (29), and the V-shaped packing member (272) is provided between the positioning sleeve (271) and the valve stem (23); and the lower pressure sleeve (275) abuts against the mounting seat (32).

5. The valve and pneumatic actuator adapter structure according to claim 4, characterized in that: A quadrangular prism is provided at one end of the valve stem (23), the mounting groove (37) is a rectangular groove corresponding to the quadrangular prism, and the bracket (28) is provided with mounting holes (281) for connecting to the mounting seat (32) around the quadrangular prism.

6. The valve and pneumatic actuator adapter structure according to claim 1, characterized in that: The transmission ratio between the shaft sleeve (33) and the transmission shaft (35) is 1:1.

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