High-temperature-resistant and high-pressure-resistant actuator structure

Abstract

The utility model provides a high-temperature and high-pressure resistant actuator structure which comprises a shell, a driving assembly is installed in the shell, and the driving assembly comprises a reset spring, a guide column, a limiting ring, an upper piston, a piston sealing ring, a lower piston, a positioning column and a nut. And embedding grooves are formed in the bottom of the outer side wall of the upper piston and the top of the outer side wall of the lower piston. When the sealing device works, air can be prevented from flowing to the position above the piston through the piston sealing ring, the piston drives the guide column to slide in the guide sleeve, the piston drives the driving rod when moving, and then the driving action is achieved. According to the high-temperature-resistant actuator, the high-temperature-resistant effect of the actuator can be improved, the high-temperature-resistant and high-pressure-resistant performance of the actuator is improved, the outer shell and the bottom shell, the upper piston and the lower piston and the pressing plate and the bottom shell are detachably connected, a sealing ring in the actuator can be conveniently and rapidly replaced, and the maintenance difficulty is lowered.

Description

TECHNICAL FIELD

[0001] The utility model relates to an executor structure, concretely high temperature and high pressure resistant executor structure belongs to executor technical field. BACKGROUND

[0002] The working principle of the pneumatic actuator is to convert the pressure energy of compressed air into mechanical energy to drive the mechanism to move linearly or rotate. When compressed air enters the air chamber of the pneumatic actuator, the air pressure pushes the piston or diaphragm to move, thereby driving the push rod or shaft connected thereto. The movement of the push rod or shaft can be transmitted to the controlled equipment through mechanical connection to control the valve, damper, etc. By controlling the pressure, flow and direction of the compressed air entering the air chamber, the movement speed, stroke and force of the pneumatic actuator can be accurately controlled to achieve accurate control of the controlled equipment.

[0003] The existing pneumatic actuator has obvious deficiencies in high temperature resistance. When used in high temperature and high pressure environment, the sealing ring inside the actuator often ages rapidly due to high temperature and high pressure, which can cause the sealing performance to decrease, thereby affecting the overall working performance and stability of the actuator. Moreover, the design of the existing actuator is relatively complex when replacing the sealing ring, thereby increasing the difficulty and cost of maintenance. Therefore, a high temperature and high pressure resistant actuator structure is proposed. SUMMARY

[0004] Therefore, the utility model provides a high temperature and high pressure resistant actuator structure to solve or alleviate the technical problems in the prior art, at least to provide a beneficial choice.

[0005] The technical scheme of the utility model embodiment is as follows: a high temperature and high pressure resistant actuator structure, comprising a shell, a driving assembly is installed inside the shell, the driving assembly comprises a reset spring, a guide column, a limiting ring, an upper piston, a piston sealing ring, a lower piston, a positioning column and a nut;

[0006] The outer side wall bottom of the upper piston and the outer side wall top of the lower piston are both provided with an embedded groove, the outer side wall of the piston sealing ring is attached to the inner side walls of the two embedded grooves, the positioning column is symmetrically fixedly connected to the upper surface of the lower piston, the positioning column is slidingly connected to the inside of the upper piston, the nut is threadedly connected to the outer side wall of the positioning column, the upper piston is attached to the lower piston, the nut is attached to the upper surface of the upper piston, the guide column is fixedly connected to the upper surface of the upper piston, the limiting ring is fixedly connected to the outer side wall of the guide column, and the reset spring is sleeved on the outer side wall of the guide column.

[0007] Further preferably, the inner top wall of the shell is fixedly connected with a guide sleeve, and the outer side wall of the guide column is slidingly connected to the inner side wall of the guide sleeve.

[0008] Further preferably, the top end of the reset spring abuts against the guide sleeve, and the bottom end of the reset spring abuts against the limiting ring.

[0009] Further preferably, the outer side wall of the upper piston, the outer side wall of the lower piston and the outer side wall of the piston sealing ring are all slidingly connected to the inner side wall of the shell.

[0010] Further preferably, the shell is provided with a bottom shell below, a connecting sealing ring is arranged between the shell and the bottom shell, and the shell and the bottom shell are fixedly connected through bolts.

[0011] Further preferably, the lower surface of the lower piston is fixedly connected with a driving rod, and the driving rod is slidingly connected to the inside of the bottom shell.

[0012] Further preferably, the outer side wall of the driving rod is sleeved with a bottom sealing ring and a pressing plate, the inner bottom wall of the bottom shell is provided with a mounting groove, and the pressing plate is mounted in the inside of the mounting groove through screws.

[0013] Further preferably, the lower surface of the bottom shell is symmetrically provided with an air inlet pipe and an air outlet pipe.

[0014] The embodiment of the utility model has the following advantages due to the adoption of the above technical scheme.

[0015] In the working process of the utility model, the piston sealing ring can prevent air from flowing into the upper part of the piston, the piston drives the guide column to slide in the guide sleeve, the positioning effect of the guide sleeve and the guide column enables the piston to move axially, the piston drives the driving rod to move when the piston moves, and thus the driving action is realized.

[0016] The above summary is only for the purpose of the description and is not intended to limit in any way. In addition to the above-described exemplary aspects, embodiments and features, further aspects, embodiments and features of the utility model will be readily apparent to those skilled in the art by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 Structure diagram of the utility model;

[0019] Figure 2 Structure diagram of the driving assembly of the utility model;

[0020] Figure 3 Structure diagram of the lower piston of the utility model;

[0021] Figure 4 Structure diagram of the bottom shell of the utility model.

[0022] Reference signs: 101, driving assembly; 11, shell; 12, reset spring; 13, guide column; 14, limiting ring; 15, upper piston; 16, piston sealing ring; 17, lower piston; 18, driving rod; 19, embedded groove; 20, positioning column; 21, nut; 22, guide sleeve; 23, connecting sealing ring; 24, pressing plate; 25, bottom sealing ring; 26, bottom shell; 27, mounting groove; 28, air inlet pipe; 29, air outlet pipe. DETAILED DESCRIPTION

[0023] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0024] The embodiments of the utility model will be described in detail below with reference to the drawings.

[0025] As Figures 1-4 shown, the utility model embodiment provides a kind of high temperature and high pressure resistant actuator structure, including shell 11, the inside installation of shell 11 has driving assembly 101, driving assembly 101 is used to realize the control to external valve;

[0026] Driving assembly 101 includes reset spring 12, guide column 13, limiting ring 14, upper piston 15, piston sealing ring 16, lower piston 17, positioning column 20 and nut 21;

[0027] The outer side wall bottom of the upper piston 15 and the outer side wall top of the lower piston 17 are both provided with embedding grooves 19, the outer side wall of the piston sealing ring 16 is attached to the inner side wall of the two embedding grooves 19, and the shape of the embedding grooves 19 is matched with the shape of the piston sealing ring 16;

[0028] The positioning column 20 is symmetrically fixedly connected to the upper surface of the lower piston 17 and is slidingly connected to the inside of the upper piston 15, and the positioning column 20 can play an auxiliary positioning effect when the upper piston 15 is connected with the lower piston 17, and the overall structure of the piston is stable after being connected;

[0029] The nut 21 is threadedly connected to the outer side wall of the positioning column 20, the upper piston 15 is attached to the lower piston 17, and the nut 21 is attached to the upper surface of the upper piston 15, the piston of the actuator is designed as a split type, which facilitates the installation of the piston sealing ring 16, the piston sealing ring 16 is placed in the embedding groove 19 of the lower piston 17 during installation, then the positioning column 20 is inserted into the upper piston 15, and the nut 21 is used for fixation, so that the installation of the piston sealing ring 16 is realized;

[0030] The guide column 13 is fixedly connected to the upper surface of the upper piston 15, the limiting ring 14 is fixedly connected to the outer side wall of the guide column 13, and the return spring 12 is sleeved on the outer side wall of the guide column 13, and the return spring 12 can play a return effect when the actuator is working, so as to realize the control of the external valve.

[0031] In an embodiment, the inner top wall of the shell 11 is fixedly connected with a guide sleeve 22, the outer side wall of the guide column 13 is slidingly connected to the inner side wall of the guide sleeve 22, the top end of the return spring 12 abuts against the guide sleeve 22, and the bottom end of the return spring 12 abuts against the limiting ring 14, and the positioning effect of the guide sleeve 22 and the guide column 13 can make the piston move axially.

[0032] In an embodiment, the outer side wall of the upper piston 15, the outer side wall of the lower piston 17 and the outer side wall of the piston sealing ring 16 are all slidingly connected to the inner side wall of the shell 11, the bottom of the shell 11 is provided with a bottom shell 26, the lower surface of the bottom shell 26 is symmetrically provided with an air inlet pipe 28 and an air outlet pipe 29, the air inlet pipe 28 fills high-pressure gas into the actuator during work, at this time, the air outlet pipe 29 is closed, the high-pressure gas pushes the piston upward, and the piston sealing ring 16 can avoid air flowing into the upper part of the piston, so as to ensure the normal work of the actuator.

[0033] In an embodiment, the shell 11 and the bottom shell 26 are fixedly connected through bolts, and the connection sealing ring 23 can ensure the sealing effect between the shell 11 and the bottom shell 26, and the top of the shell 11 is provided with an exhaust hole.

[0034] In one embodiment, the lower surface of the lower piston 17 is fixedly connected with a driving rod 18, the driving rod 18 is slidingly connected to the inside of the bottom shell 26, the driving rod 18 is connected with an external valve control device, and then when the driving rod 18 is displaced, the external valve can be controlled.

[0035] In one embodiment, the outer side wall of the driving rod 18 is sleeved with a bottom sealing ring 25 and a pressing plate 24, the inner bottom wall of the bottom shell 26 is provided with a mounting groove 27, the pressing plate 24 is mounted in the inside of the mounting groove 27 through screws, and the bottom sealing ring 25 is located below the pressing plate 24, and then air can be prevented from flowing out from the gap between the driving rod 18 and the bottom shell 26 through the bottom sealing ring 25.

[0036] In one embodiment, the piston sealing ring 16, the connecting sealing ring 23 and the bottom sealing ring 25 are all made of fluorine rubber material, the fluorine rubber has strong heat resistance and can be used for a long time under high temperature and high pressure, so that the sealing ring of the actuator will not be rapidly aged.

[0037] When the utility model works: through the air inlet pipe 28, high pressure gas is filled into the actuator, the air outlet pipe 29 is closed, the high pressure gas pushes the piston upwards, air can be prevented from flowing into the upper part of the piston through the piston sealing ring 16, the piston drives the guide column 13 to slide in the guide sleeve 22, the reset spring 12 is compressed under stress, and the driving rod 18 is driven by the piston, and then the external valve can be controlled through the driving rod 18, after the action is completed, the gas filling is stopped, the air outlet pipe 29 is opened, and at this time, the driving rod 18 is reset under the action of the reset spring 12.

[0038] When the sealing ring needs to be replaced, the bolts between the shell 11 and the bottom shell 26 are first disassembled, the shell 11 and the bottom shell 26 are separated, the connecting sealing ring 23 can be disassembled and replaced at this time, then the pressing plate 24 is disassembled, the bottom sealing ring 25 can be replaced at this time, and finally the nut 21 is disassembled, the upper piston 15 and the lower piston 17 are separated, and the piston sealing ring 16 can be replaced at this time.

[0039] Compared with the prior art, the sealing ring made of fluorine rubber material can improve the high temperature resistance effect of the actuator, improve the high temperature resistance and high pressure resistance performance of the actuator, the shell 11 and the bottom shell 26, the upper piston 15 and the lower piston 17, and the pressing plate 24 and the bottom shell 26 are all connected in a detachable manner, the sealing ring inside the actuator can be quickly replaced, and the difficulty of maintenance is reduced.

[0040] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various changes or replacements within the technical range disclosed by the present application, which should be encompassed in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A high temperature and high pressure resistant actuator structure comprising a housing (11), characterized in that: The inside of the shell (11) is provided with a driving assembly (101), which comprises a reset spring (12), a guide column (13), a limiting ring (14), an upper piston (15), a piston sealing ring (16), a lower piston (17), a positioning column (20) and a nut (21). The outer side wall bottom of the upper piston (15) and the outer side wall top of the lower piston (17) are provided with embedding grooves (19), the outer side wall of the piston sealing ring (16) is attached to the inner side walls of the two embedding grooves (19), the positioning column (20) is fixedly connected to the upper surface of the lower piston (17) in a symmetrical manner, the positioning column (20) is slidingly connected to the inside of the upper piston (15), the nut (21) is threadedly connected to the outer side wall of the positioning column (20), the upper piston (15) is attached to the lower piston (17), the nut (21) is attached to the upper surface of the upper piston (15), the guide column (13) is fixedly connected to the upper surface of the upper piston (15), the limiting ring (14) is fixedly connected to the outer side wall of the guide column (13), and the reset spring (12) is sleeved on the outer side wall of the guide column (13).

2. The high temperature and high pressure resistant actuator structure according to claim 1, characterized in that: The inner top wall of the shell (11) is fixedly connected with a guide sleeve (22), and the outer side wall of the guide column (13) is slidingly connected to the inner side wall of the guide sleeve (22).

3. The high temperature and high pressure resistant actuator structure according to claim 2, characterized in that: The top end of the reset spring (12) abuts against the guide sleeve (22), and the bottom end of the reset spring (12) abuts against the limiting ring (14).

4. The high temperature and high pressure resistant actuator structure according to claim 3, characterized in that: The outer side wall of the upper piston (15), the outer side wall of the lower piston (17) and the outer side wall of the piston sealing ring (16) are slidingly connected to the inner side wall of the shell (11).

5. The high temperature and high pressure resistant actuator structure according to claim 4, characterized in that: The lower part of the shell (11) is provided with a bottom shell (26), and a connecting sealing ring (23) is arranged between the shell (11) and the bottom shell (26), and the shell (11) and the bottom shell (26) are fixedly connected through bolts.

6. The high temperature and high pressure resistant actuator structure according to claim 5, characterized in that: The lower surface of the lower piston (17) is fixedly connected with a driving rod (18), and the driving rod (18) is slidingly connected to the inside of the bottom shell (26).

7. The high temperature and high pressure resistant actuator structure according to claim 6, characterized in that: The outer side wall of the driving rod (18) is sleeved with a bottom sealing ring (25) and a pressing plate (24), the inner bottom wall of the bottom shell (26) is provided with a mounting groove (27), and the pressing plate (24) is mounted in the inside of the mounting groove (27) through screws.

8. The high temperature and high pressure resistant actuator structure according to claim 7, characterized in that: The lower surface of the bottom shell (26) is symmetrically provided with an air inlet pipe (28) and an air outlet pipe (29).

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