Gate valve pneumatic actuator

Abstract

The utility model relates to a gate valve pneumatic actuator, and relates to the technical field of actuators, the gate valve pneumatic actuator comprises an air cylinder assembly, a spring assembly and a box seat assembly, the air cylinder assembly and the spring assembly are fixedly arranged on the two opposite side faces of the box seat assembly respectively; the box base assembly comprises a box body, a box cover covering the box body, a driving rod located in the box body and a transmission part driving the driving rod to rotate, and one end of the driving rod extends to the outside from the bottom side of the box body; a protective shell and a cover plate which are located at the outer end of the driving rod are arranged outside the box body, the protective shell is detachably installed outside the box body, one side of the cover plate is hinged to the edge of an opening of the protective shell, a locking through hole is formed in the edge of the other side of the cover plate, a locking screw hole is formed in the protective shell, and the locking screw hole is matched with the locking through hole. A locking bolt is arranged outside the box body; according to the conveying device, the outer end of the driving rod is arranged in the protective shell, so that the possibility that the outer end of the driving rod is damaged due to collision in the conveying process is reduced.

Description

Technical Field

[0001] This application relates to the technical field of actuators, and in particular to a pneumatic actuator for a gate valve. Background Technology

[0002] Pneumatic actuators, also known as pneumatic actuators or pneumatic devices, are actuators that use air pressure to open, close, or regulate valves. In industrial production, they play a crucial role due to their significant advantages such as fast response, stable and reliable operation, and high degree of automation. Especially when pneumatic actuators are used in gate valve control, they can achieve precise control of the gate valve, thereby meeting the diverse movement requirements of various industrial pipelines and equipment.

[0003] In related technologies, a pneumatic actuator for a gate valve includes several key components such as a cylinder module, a housing module, and a spring module. The housing module features an ingeniously designed drive rod structure that cleverly utilizes a U-shaped groove and piston pin mechanism to successfully convert the linear reciprocating motion of the piston within the cylinder into the rotational motion of the drive rod, thereby driving the opening and closing of the entire valve.

[0004] However, during transportation, because part of the drive rod on the outside of the housing module is exposed, even with simple packaging protection, it is still difficult to completely avoid the risk of bumps and damage during transport. This potential damage not only affects the appearance of the pneumatic actuator, but more importantly, it may cause irreversible damage to its internal structure, indicating room for improvement. Utility Model Content

[0005] The purpose of this application is to provide a gate valve pneumatic actuator that solves the problem in the above-mentioned related technologies that the exposed drive rod may be damaged during transportation due to bumps, which may seriously affect the performance of the pneumatic actuator.

[0006] The technical solution for a gate valve pneumatic actuator provided in this application is as follows:

[0007] A pneumatic actuator for a gate valve includes a cylinder assembly, a spring assembly, and a housing assembly. The cylinder assembly and the spring assembly are respectively fixed on opposite sides of the housing assembly. The housing assembly includes a housing, a cover on the housing, a drive rod located inside the housing, and a transmission component that drives the drive rod to rotate. The cylinder assembly and the spring assembly drive the drive rod to reciprocate through the transmission component. One end of the drive rod extends from the bottom side of the housing to the outside. The housing is provided with a protective shell and a cover plate located at the outer end of the drive rod. The protective shell is detachably installed on the outside of the housing. One side of the cover plate is hinged to the opening edge of the protective shell, and the other side edge of the cover plate is provided with a locking through hole. The protective shell is provided with a locking screw hole, and the housing is provided with a locking bolt that passes through the locking through hole and is screwed into the locking screw hole.

[0008] By adopting the above technical solution, due to the combination of the protective shell, cover plate and locking bolts, the protective shell can be detachably installed on the outside of the housing during the transportation of the pneumatic actuator. At this time, the outer end of the drive rod is placed inside the protective shell, and the cover plate is fixed with locking bolts, thus sealing the opening of the protective shell. This reduces the possibility of damage to the outer end of the drive rod due to bumps during transportation.

[0009] Optionally, the protective shell is fixedly provided with a flange on the side edge facing the box body, and a fixing through hole is provided on the flange. A fixing thread groove that can coincide with the fixing through hole is provided on the bottom side of the box body. A fixing bolt is provided on the outside of the box body that passes through the fixing through hole and is screwed into the fixing thread groove.

[0010] By adopting the above technical solution, during the detachable assembly of the protective shell and the box, due to the combination of flange and fixing bolt, the fixing bolt is screwed into the fixing thread groove after passing through the fixing through hole, thereby realizing the detachable installation of the protective shell and the box.

[0011] Optionally, a support base is fixed on the bottom edge of the housing, and the side edge of the protective shell is rotatably connected to the support base. The side of the protective shell away from the cover plate can be rotated to a state where it abuts against the vertical side of the housing and is fixed. A positioning through hole is opened on the side wall of the protective shell, and a positioning threaded groove that can coincide with the positioning through hole is opened on the vertical outer side of the housing. The fixing bolt can pass through the positioning through hole and be screwed into the positioning threaded groove.

[0012] By adopting the above technical solution, due to the rotation setting of the protective shell, when the protective shell and cover plate remove the protection of the outer end of the drive rod and flip it upward, the side of the protective shell away from the cover plate can rotate to the state of abutting the vertical side of the box. Then, the fixing bolt is used to pass through the positioning through hole and screw into the positioning thread groove.

[0013] Optionally, the fixing bolt is a wing bolt.

[0014] By adopting the above technical solution, since the fixing bolt is a wing bolt, the user can tighten or loosen the fixing bolt directly with their fingers, which improves the performance of the fixing bolt.

[0015] Optionally, a plurality of flexible fixing straps are fixed on the inner wall of the protective shell, and the flexible fixing straps are used to assist in the installation and removal of the pneumatic actuator.

[0016] By adopting the above technical solution, after the protective shell removes the protection on the outer end of the drive rod and flips upward to fix it, the installation and removal tools required for the pneumatic actuator can be fixed to the inner wall of the protective shell by a flexible fixing strap, which facilitates the subsequent installation or disassembly and inspection of the pneumatic actuator.

[0017] Optionally, an elastic pad is fixed on the side edge of the protective shell facing the housing, and the elastic pad can abut against the outer side of the housing when the protective shell protects the outer end of the drive rod.

[0018] By adopting the above technical solution, when the protective shell is fixed on the bottom side of the box to protect the outer end of the drive rod, the elastic pad on the protective shell is compressed and pressed against the bottom side of the box due to the installation of the elastic pad on the protective shell, thereby improving the installation stability of the protective shell.

[0019] Optionally, an elastic sealing gasket is fixed on the opening edge of the protective shell, and the side of the cover plate facing the protective shell can abut against the elastic sealing gasket.

[0020] By adopting the above technical solution, after the cover plate closes the opening on the protective shell, due to the installation of the elastic sealing gasket, the side of the cover plate facing the protective shell can be pressed against the elastic sealing gasket, thereby improving the sealing performance when the cover plate seals the opening of the protective shell.

[0021] Optionally, the cover plate is provided with several reinforcing ridges on the side facing the protective shell.

[0022] By adopting the above technical solutions, the structural strength of the cover plate is improved and its service life is extended.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. During the transportation of this pneumatic actuator, the protective shell is detachably installed on the outside of the housing. At this time, the outer end of the drive rod is placed inside the protective shell, and the cover plate is fixed with locking bolts. The cover plate then seals the opening of the protective shell. This reduces the possibility of damage to the outer end of the drive rod due to impact during transportation.

[0025] 2. After the protective shell removes the protection on the outer end of the drive rod and flips upward to fix it, the necessary installation and removal tools for the pneumatic actuator can be fixed to the inner wall of the protective shell using flexible fixing straps, which facilitates the subsequent installation or disassembly and inspection of the pneumatic actuator. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0028] Figure 2 This is a partial cross-sectional view of the cylinder assembly and spring assembly installation and cooperation in an embodiment of this application;

[0029] Figure 3 This is a schematic diagram illustrating the installation and cooperation of the protective shell and the cover plate in an embodiment of this application;

[0030] Figure 4 This is a partial cross-sectional view of the structure of the protective shell and the cover plate in an embodiment of this application.

[0031] Figure 5 yes Figure 4 An enlarged schematic diagram of part A in the middle;

[0032] Figure 6 This is a partial cross-sectional view of the structure of the protective shell and the enclosure in an embodiment of this application.

[0033] Figure 7 This is a partial cross-sectional structural diagram illustrating the protective shell removing its protection on the drive rod in an embodiment of this application.

[0034] In the diagram, 1. Cylinder assembly; 11. Cylinder body; 12. Piston block; 13. Piston rod; 2. Spring assembly; 21. Sleeve; 22. Compression spring; 23. Spring rod; 24. Baffle; 3. Housing assembly; 31. Housing; 311. Fixed threaded groove; 312. Positioning threaded groove; 313. Support base; 32. Housing cover; 33. Drive rod; 34. Transmission component; 341. Rotating disk; 342. Lever; 3421. Guide notch; 35. Transmission rod; 36. Guide block; 4. Protective shell; 41. Locking screw hole; 42. Flanged edge; 421. Fixed through hole; 43. Positioning through hole; 44. Elastic pad; 45. Elastic sealing pad; 46. Flexible fixing band; 5. Cover plate; 51. Locking through hole; 52. Reinforcing ridge; 6. Locking bolt; 7. Fixing bolt; 71. Wing bolt. Detailed Implementation

[0035] The present application will be further described in detail below with reference to all the accompanying drawings.

[0036] Example:

[0037] Reference Figure 1 and Figure 2 A gate valve pneumatic actuator includes a cylinder assembly 1, a spring assembly 2, and a housing assembly 3, wherein the cylinder assembly 1 and the spring assembly 2 are respectively fixed on opposite sides of the housing assembly 3; the housing assembly 3 includes a housing 31, a housing cover 32 mounted on the housing 31, a drive rod 33 located inside the housing 31, and a transmission component 34 that drives the drive rod 33 to rotate. The cylinder assembly 1 and the spring assembly 2 drive the drive rod 33 to reciprocate through the transmission component 34, and one end of the drive rod 33 extends from the bottom side of the housing 31 to the outside.

[0038] Reference Figure 2 The cylinder assembly 1 includes a cylinder body 11 and a piston block 12 located inside the cylinder body 11. A piston rod 13 extending through the cylinder body 11 to the outside is fixed on one side of the piston block 12. The spring assembly 2 includes a sleeve 21 and a compression spring 22 located inside the sleeve 21 and a spring rod 23 located in the middle of the compression spring 22. One end of the spring rod 23 passes through the end of the sleeve 21 and extends to the outside, and a baffle 24 is fixed on the other end. The two ends of the compression spring 22 abut against the baffle 24 and the inner wall of the sleeve 21, respectively. The cylinder assembly 1 and the spring assembly 2 will not be described in detail here.

[0039] The transmission component 34 includes a rotating disk 341 rotatably disposed inside the housing 31 and a lever 342 fixed on the outer periphery of the rotating disk 341. The drive rod 33 is coaxially and fixedly connected to the rotating disk 341. The end of the lever 342 away from the rotating disk 341 has a guide notch 3421 along its own length direction. A guide block 36 is slidably disposed in the guide notch 3421. A transmission rod 35 with its length direction perpendicular to the drive rod 33 is rotatably disposed on the guide block 36. The piston rod 13 extends into the housing 31 and is coaxially and fixedly connected to one end of the transmission rod 35. The spring rod 23 extends into the housing 31 and is coaxially and fixedly connected to the other end of the transmission rod 35.

[0040] When compressed gas is supplied to the cylinder body 11, the piston rod 13 slides away from the housing 31, the spring rod 23 and the baffle 24 slide synchronously, the compression spring 22 is compressed, and the drive rod 33 rotates; when the gas supply stops, the compression spring 22 returns to its original position, the spring rod 23 and the baffle 24 slide in the opposite direction under the action of the compression spring 22, and the drive rod 33 rotates in the opposite direction to return to its original position.

[0041] Reference Figure 3 and Figure 4The outer side of the housing 31 is provided with a protective shell 4 and a cover plate 5 located at the outer end of the drive rod 33. The protective shell 4 is detachably installed on the bottom side of the outer side of the housing 31. One side of the cover plate 5 is hinged to the opening edge of the protective shell 4. The other side edge of the cover plate 5 is provided with a locking through hole 51. The protective shell 4 is provided with a locking screw hole 41. The outer side of the housing 31 is provided with a locking bolt 6 that passes through the locking through hole 51 and is screwed into the locking screw hole 41. The locking bolt 6 is a wing bolt 71.

[0042] Reference Figure 3 and Figure 4 The protective shell 4 has a rubber elastic sealing gasket 45 fixed on the edge of the opening. After the cover plate 5 closes the opening on the protective shell 4, the side of the cover plate 5 facing the protective shell 4 can be pressed against the elastic sealing gasket 45. Several reinforcing ridges 52 are integrally formed on the side of the cover plate 5 facing the protective shell 4, thereby improving the structural strength of the cover plate 5.

[0043] Reference Figure 4 and Figure 6 The protective shell 4 has two flanges 42 fixedly fixed on the side edge facing the box 31. The flanges 42 have fixed through holes 421. The bottom side of the box 31 has a fixed threaded groove 311 that can coincide with the fixed through hole 421. The outside of the box 31 has a fixing bolt 7 that passes through the fixed through hole 421 and is screwed into the fixed threaded groove 311. The fixing bolt 7 is a wing bolt 71.

[0044] A rubber elastic pad 44 is fixed on the side edge of the protective shell 4 facing the box 31. When the protective shell 4 is fixed to the bottom side of the box 31 to protect the outer end of the drive rod 33, the elastic pad 44 is compressed and abuts against the bottom side of the box 31, thereby improving the installation stability of the protective shell 4.

[0045] Reference Figure 7 A support base 313 is fixed on the bottom side edge of the box 31, wherein the side edge of the protective shell 4 is rotatably connected to the support base 313, and the side of the protective shell 4 away from the cover plate 5 can be rotated to the state of abutting against the vertical side of the box 31 and fixed.

[0046] The protective shell 4 has a positioning through hole 43 on its side wall, and the box body 31 has a positioning threaded groove 312 that can coincide with the positioning through hole 43 on its vertical outer side surface. When the protective shell 4 and the cover plate 5 remove the protection of the outer end of the drive rod 33 and flip it upward, the fixing bolt 7 is used to pass through the positioning through hole 43 and screwed into the positioning threaded groove 312 to fix the protective shell 4 in this state.

[0047] Reference Figure 7Several flexible fixing straps 46 are fixed on the inner wall of the protective shell 4. After the protective shell 4 removes the protection of the outer end of the drive rod 33 and flips upward to fix it, the installation and removal tools required for the pneumatic actuator can be fixed on the inner wall of the protective shell 4 by the flexible fixing straps 46.

[0048] The implementation principle of this application embodiment is as follows:

[0049] During the transportation of the pneumatic actuator, the protective shell 4 is flipped downwards and fixed with the fixing bolts 7. Then, the opening of the protective shell 4 is sealed with the cover plate 5 to protect the outer end of the drive rod 33. When the pneumatic actuator is in use, the protective shell 4 is flipped upwards and the fixing bolts 7 are screwed into the positioning threaded groove 312 after passing through the positioning through hole 43. At this time, the installation and disassembly tools required for the pneumatic actuator can be fixed to the inner wall of the protective shell 4 by the flexible fixing strap 46, which facilitates the subsequent installation or disassembly and inspection of the pneumatic actuator.

[0050] Unless otherwise defined, the terms or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "a" or "one," and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," and similar words mean that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0051] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gate valve pneumatic actuator, comprising a cylinder assembly (1), a spring assembly (2), and a housing assembly (3), wherein the cylinder assembly (1) and the spring assembly (2) are respectively fixed on opposite sides of the housing assembly (3); the housing assembly (3) comprises a housing (31), a housing cover (32) covering the housing (31), a drive rod (33) located inside the housing (31), and a transmission component (34) for driving the drive rod (33) to rotate, wherein the cylinder assembly (1) and the spring assembly (2) drive the drive rod (33) to reciprocate through the transmission component (34), and one end of the drive rod (33) extends from the bottom side of the housing (31) to the outside; Its features are, The outer side of the housing (31) is provided with a protective shell (4) and a cover plate (5) located at the outer end of the drive rod (33). The protective shell (4) is detachably installed on the outside of the housing (31). One side of the cover plate (5) is hinged to the opening edge of the protective shell (4). The other side edge of the cover plate (5) is provided with a locking through hole (51). The protective shell (4) is provided with a locking screw hole (41). The outer side of the housing (31) is provided with a locking bolt (6) that passes through the locking through hole (51) and is screwed into the locking screw hole (41).

2. The pneumatic actuator for a gate valve according to claim 1, characterized in that, The protective shell (4) has a flange (42) fixed on the side edge facing the box body (31). The flange (42) has a fixing through hole (421). The bottom side of the box body (31) has a fixing thread groove (311) that can coincide with the fixing through hole (421). The outside of the box body (31) is provided with a fixing bolt (7) that passes through the fixing through hole (421) and is screwed into the fixing thread groove (311).

3. A gate valve pneumatic actuator according to claim 2, characterized in that, A support base (313) is fixed on the bottom side edge of the box (31), and the side edge of the protective shell (4) is rotatably connected to the support base (313). The side of the protective shell (4) away from the cover plate (5) can be rotated to the state of abutting against the vertical side of the box (31) and fixed. The protective shell (4) has a positioning through hole (43) on its side wall, and the box body (31) has a positioning thread groove (312) that can coincide with the positioning through hole (43) on its vertical outer side surface. The fixing bolt (7) can pass through the positioning through hole (43) and be screwed into the positioning thread groove (312).

4. A gate valve pneumatic actuator according to claim 3, characterized in that, The fixing bolt (7) is a wing bolt (71).

5. A gate valve pneumatic actuator according to claim 3, characterized in that, The inner wall of the protective shell (4) is provided with several flexible fixing straps (46), which are used to assist in the installation and removal of the pneumatic actuator.

6. A gate valve pneumatic actuator according to claim 1, characterized in that, An elastic pad (44) is fixed on the side edge of the protective shell (4) facing the box body (31). The elastic pad (44) can abut against the outer side of the box body (31) when the protective shell (4) protects the outer end of the drive rod (33).

7. A gate valve pneumatic actuator according to claim 1, characterized in that, An elastic sealing gasket (45) is fixed on the opening edge of the protective shell (4), and the side of the cover plate (5) facing the protective shell (4) can be pressed against the elastic sealing gasket (45).

8. A gate valve pneumatic actuator according to claim 1, characterized in that, The cover plate (5) is fixed with several reinforcing ridges (52) on the side facing the protective shell (4).

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