Pneumatic actuator with high-temperature-resistant function

Abstract

The pneumatic actuator with the high-temperature-resistant function comprises a shell, the shell is of a structure with the two ends open, a heat insulation layer is arranged on the outer side of the shell, a heat insulation shell covering the shell is fixedly connected to the outer side of the shell, heat insulation covers are arranged at the two ends of the shell, and the heat insulation covers are fixedly connected to the outer side of the shell. The heat insulation cover is detachably connected with the shell through a plurality of screws, rotating holes are formed in the top and the bottom of the shell, connecting shafts are rotationally connected into the two rotating holes, the two ends of each connecting shaft penetrate through the heat insulation shell, and an air inlet pipe is fixedly connected to the position, aligned with the connecting shafts, of one side of the shell. According to the pneumatic actuator, the heat insulation effect of the shell can be improved, so that the high-temperature-resistant function of the pneumatic actuator is achieved, gas can be prevented from leaking from a gap between the connecting shaft and the shell, the sealing effect of the pneumatic actuator is improved, leakage between the gas inlet pipe and an external pipeline can be avoided, and the service life of the pneumatic actuator is prolonged. And the air inlet sealing performance of the pneumatic actuator is improved.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic actuator technology, and in particular to a pneumatic actuator with high temperature resistance. Background Technology

[0002] A pneumatic actuator is an actuating device that uses air pressure to drive the opening, closing, or regulation of valves. It is also known as a pneumatic actuator or pneumatic device. It is usually powered by compressed air and is used to open and close various pneumatic valves.

[0003] However, the following drawbacks still exist: high temperature can cause the performance of pneumatic actuators to degrade, and high temperature can also affect the sensitivity and response speed of pneumatic components, reduce their control accuracy and reliability, and may even lead to actuator failure. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a pneumatic actuator with high-temperature resistance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pneumatic actuator with high-temperature resistance includes a housing with open ends. A heat insulation layer is provided on the outer side of the housing. A heat insulation shell is fixedly connected to the outer side of the housing to cover it. Heat insulation covers are provided at both ends of the housing and are detachably connected to the housing via multiple screws. Rotating holes are provided at the top and bottom of the housing, and a connecting shaft is rotatably connected to each of the two rotating holes, with both ends of the connecting shaft passing through the heat insulation shell. An air inlet pipe is fixedly connected to one side of the housing at a position aligned with the connecting shaft, and the air inlet pipe passes through the heat insulation shell. A drive assembly for rotating the connecting shaft is provided inside the housing.

[0007] As a further embodiment of this utility model, the drive assembly includes two pistons, both of which are disposed within the housing, allowing the two pistons to move along the axial direction of the housing. The connecting shaft is located between the two pistons, and racks are fixedly connected to opposite sides of the two pistons. A gear is keyed to the outer side of the connecting shaft between the two racks, and the gear meshes with the racks. Fixing plates are fixedly connected to both ends of the housing, and multiple springs are fixedly connected to one side of the fixing plates, with the springs fixed to the pistons.

[0008] As a further embodiment of this utility model, a plurality of telescopic rods are fixedly connected to one side of the fixing plate, and the plurality of telescopic rods pass through a plurality of springs respectively, and one end of the telescopic part of the plurality of telescopic rods is fixed to the piston.

[0009] As a further embodiment of this utility model, an indicator is fixedly connected to the top of the heat insulation shell. The indicator includes a dial and an indicator needle, and the shaft of the indicator needle passes through the dial and is fixed to the connecting shaft.

[0010] As a further embodiment of this utility model, a heat insulation cover is fixedly connected to the top of the heat insulation shell, and the indicator is located inside the heat insulation cover. An observation window is provided on the top of the heat insulation cover.

[0011] As a further improvement of this utility model, a first sealing ring is fixedly connected to one end of the air intake pipe.

[0012] As a further embodiment of this invention, a second sealing ring is fixedly connected to the outer side of the connecting shaft at a position inside the rotating hole.

[0013] As a further improvement of this invention, the bottom of the heat insulation shell is fixedly connected to two support feet.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. By using the heat insulation shell, heat insulation layer and heat insulation cover together, the heat insulation shell and heat insulation cover can isolate external heat, thereby preventing external heat from entering the shell. At the same time, the heat insulation layer can further improve the heat insulation effect of the shell, thereby realizing the high temperature resistance function of the pneumatic actuator.

[0016] 2. By setting the second sealing ring, the gap between the connecting shaft and the housing can be sealed, thereby preventing gas from leaking from the gap between the connecting shaft and the housing and improving the sealing effect of the pneumatic actuator.

[0017] 3. By setting the first sealing ring, the first sealing ring can seal when the air inlet pipe is connected to the external pipe, thereby avoiding leakage between the air inlet pipe and the external pipe and improving the air sealing performance of the pneumatic actuator. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the front side of a pneumatic actuator with high temperature resistance proposed in this utility model;

[0019] Figure 2 This is a partial cross-sectional view of a pneumatic actuator with high-temperature resistance proposed in this utility model.

[0020] Figure 3 This is a schematic cross-sectional view of the overall structure of a pneumatic actuator with high-temperature resistance proposed in this utility model.

[0021] In the diagram: 1. Heat shield; 2. Screw; 3. Heat shield cover; 4. Support foot; 5. Heat shield shell; 6. First sealing ring; 7. Heat insulation layer; 8. Connecting shaft; 9. Air inlet pipe; 10. Indicator; 11. Piston; 12. Spring; 13. Telescopic rod; 15. Rack; 16. Second sealing ring; 17. Gear; 18. Fixing plate. Detailed Implementation

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Therefore, all other embodiments of this application described herein, and all embodiments obtained by those skilled in the art without creative effort based on the embodiments in this application, should fall within the scope of protection of this application.

[0023] Reference Figures 1-3 A pneumatic actuator with high-temperature resistance includes a housing with open ends. A heat insulation layer 7 is provided on the outer side of the housing. A heat insulation shell 5, which covers the housing, is fixed to the outer side of the housing by bolts. Heat insulation covers 3 are provided at both ends of the housing, and are detachably connected to the housing by multiple screws 2. Rotary holes are provided at the top and bottom of the housing, and a connecting shaft 8 is rotatably connected to each of the two holes, with both ends of the connecting shaft 8 passing through the heat insulation shell 5. An air inlet pipe 9 is welded to one side of the housing, aligned with the connecting shaft 8, and passes through the heat insulation shell 5. A drive assembly for rotating the connecting shaft 8 is provided inside the housing. By providing the heat insulation shell 5 on the outer side of the housing and sealing both ends of the housing with the heat insulation covers 3, the heat insulation shell 5 and heat insulation covers 3 can isolate external heat, thus preventing external heat from entering the housing. Simultaneously, the heat insulation layer 7 on the outer side of the housing provides heat insulation, further improving the heat insulation effect of the housing, thereby achieving the high-temperature resistance function of the pneumatic actuator.

[0024] In this invention, the drive assembly includes two pistons 11, both of which are housed within a housing, allowing them to move axially along the housing. A connecting shaft 8 is located between the two pistons 11. A rack 15 is bolted to the opposite side of each piston 11. A gear 17 is keyed to the outer side of the connecting shaft 8 between the two racks 15, and the gear 17 meshes with the racks 15. Fixing plates 18 are bolted to both ends of the housing. Multiple springs 12 are welded to one side of each fixing plate 18, and the springs 12 are fixed to the pistons 11. Multiple telescopic rods 13 are bolted to one side of each fixing plate 18, passing through the multiple springs 12, and one end of the telescopic portion of each telescopic rod 13 is connected to... The piston 11 is fixed, and the top of the heat insulation shell 5 is fixed with an indicator 10 by bolts. The indicator 10 includes a dial and an indicator needle. The shaft of the indicator needle passes through the dial and is fixed to the connecting shaft 8. When the pneumatic actuator is in use, the external pipe is connected to the air inlet pipe 9, and gas is supplied to the shell through the air inlet pipe 9. At this time, under the action of air pressure, the two pistons 11 will be pushed to move in opposite directions along the axial direction of the shell. When the piston 11 moves, it will drive the rack 15 to move. The rack 15 will drive the gear 17 to rotate. The gear 17 will drive the connecting shaft 8 to rotate. The connecting shaft 8 will drive the pointer of the indicator 10 to rotate. After the pointer rotates, the rotation angle of the connecting shaft 8 can be observed at the position indicated on the indicator 10, so that the operator can judge the rotation angle of the connecting shaft 8.

[0025] In particular, the top of the heat insulation shell 5 is fixed with a heat insulation cover 1 by bolts, and the indicator 10 is located inside the heat insulation cover 1. The top of the heat insulation cover 1 is provided with an observation window. The heat insulation cover 1 can isolate the indicator 10 from heat. One end of the air inlet pipe 9 is bonded with a first sealing ring 6. The first sealing ring 6 can seal when the air inlet pipe 9 is connected to the external pipe, thereby preventing leakage between the air inlet pipe 9 and the external pipe and improving the air sealing performance of the pneumatic actuator. The outer side of the connecting shaft 8 is bonded with a second sealing ring 16 located in the rotating hole. The second sealing ring 16 can seal the gap between the connecting shaft 8 and the shell, thereby preventing gas from leaking from the gap between the connecting shaft 8 and the shell and improving the sealing effect of the pneumatic actuator. The bottom of the heat insulation shell 5 is fixed with two support feet 4 by bolts.

[0026] Working principle: By setting a heat insulation shell 5 on the outside of the housing and sealing both ends of the housing with a heat insulation cover 3, the heat insulation shell 5 and the heat insulation cover 3 can isolate external heat, thereby preventing external heat from entering the housing. At the same time, a heat insulation layer 7 is set on the outside of the housing, which can give the housing a heat insulation function and further improve the heat insulation effect of the housing, thereby realizing the high temperature resistance function of the pneumatic actuator. When the pneumatic actuator is in use, the external pipe is connected to the air inlet pipe 9, and gas is delivered into the housing through the air inlet pipe 9. At this time, under the action of air pressure, the two pistons 11 will be pushed to move in opposite directions along the axial direction of the housing. When the pistons 11 move, they will drive the rack 15 to move, the rack 15 will drive the gear 17 to rotate, the gear 17 will drive the connecting shaft 8 to rotate, and the connecting shaft 8 will drive the pointer of the indicator 10 to rotate. After the pointer rotates, the rotation angle of the connecting shaft 8 can be observed at the position indicated on the indicator 10, so that the operator can judge the rotation angle of the connecting shaft 8.

[0027] This utility model has been described through the above embodiments. Those skilled in the art will understand that this utility model is not limited to the above embodiments. Many more modifications can be made based on the teachings of this utility model, and all such modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pneumatic actuator with high-temperature resistance, comprising a housing, wherein the housing has an open-end structure, characterized in that, The outer side of the housing is provided with a heat insulation layer (7), and a heat insulation shell (5) covering the housing is fixedly connected to the outer side of the housing. Both ends of the housing are provided with heat insulation covers (3). The heat insulation covers (3) are detachably connected to the housing by multiple screws (2). The top and bottom of the housing are provided with rotating holes. A connecting shaft (8) is rotatably connected in the two rotating holes, and both ends of the connecting shaft (8) pass through the heat insulation shell (5). An air inlet pipe (9) is fixedly connected to one side of the housing at a position aligned with the connecting shaft (8), and the air inlet pipe (9) passes through the heat insulation shell (5). The housing is provided with a drive assembly that makes the connecting shaft (8) rotate.

2. A pneumatic actuator with high-temperature resistance according to claim 1, characterized in that, The drive assembly includes two pistons (11), both of which are disposed inside the housing, allowing the two pistons (11) to move along the axial direction of the housing. The connecting shaft (8) is located between the two pistons (11). A rack (15) is fixedly connected to one side of each of the two pistons (11). A gear (17) is keyed to the outer side of the connecting shaft (8) between the two racks (15), and the gear (17) meshes with the rack (15). Fixing plates (18) are fixedly connected to both ends of the housing. A plurality of springs (12) are fixedly connected to one side of the fixing plate (18), and the springs (12) are fixed to the pistons (11).

3. A pneumatic actuator with high-temperature resistance according to claim 2, characterized in that, A plurality of telescopic rods (13) are fixedly connected to one side of the fixed plate (18). The plurality of telescopic rods (13) pass through a plurality of springs (12) respectively, and one end of the telescopic part of the plurality of telescopic rods (13) is fixed to the piston (11).

4. A pneumatic actuator with high-temperature resistance according to claim 1, characterized in that, The top of the heat insulation shell (5) is fixedly connected to an indicator (10), which includes a dial and an indicator needle. The shaft of the indicator needle passes through the dial and is fixed to the connecting shaft (8).

5. A pneumatic actuator with high-temperature resistance according to claim 4, characterized in that, The top of the heat insulation shell (5) is fixedly connected to a heat insulation cover (1), and the indicator (10) is located inside the heat insulation cover (1). The top of the heat insulation cover (1) is provided with an observation window.

6. A pneumatic actuator with high-temperature resistance according to claim 1, characterized in that, One end of the air intake pipe (9) is fixedly connected to a first sealing ring (6).

7. A pneumatic actuator with high-temperature resistance according to claim 1, characterized in that, The second sealing ring (16) is fixedly connected to the outer side of the connecting shaft (8) at the position inside the rotating hole.

8. A pneumatic actuator with high-temperature resistance according to claim 1, characterized in that, The bottom of the heat insulation shell (5) is fixedly connected to two support feet (4).

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