Butterfly valve actuator with good sealing performance

Abstract

The utility model discloses a butterfly valve actuator with good sealing performance, which comprises a butterfly valve and a pneumatic actuator, the butterfly valve is connected with a flange, the flange is provided with a first sealing ring, the bottom end of the pneumatic actuator is connected with a connector, the bottom end of the connector is provided with an insertion hole, a second sealing ring is arranged in the insertion hole, and the flange is arranged in the insertion hole. The trapezoidal block is connected with the connector, the outer wall of the connector is provided with an annular groove, the inner wall of the top end of the annular groove is connected with a spring, the spring is connected with a lantern ring, and the lantern ring is internally provided with a conical hole, so that the conical hole in the lantern ring is always in contact with the trapezoidal block under the action of the elastic force of the spring through the matching among the connector, the spring, the lantern ring and the trapezoidal block; and the inclined surface of the other end of the trapezoidal block generates thrust for pushing the trapezoidal block into the insertion hole, and the inclined surface of the other end of the trapezoidal block generates thrust for pushing the bottom end of the flange into the insertion hole, so that the flange and the insertion hole are contacted more tightly, the sealing connection between the butterfly valve and the pneumatic actuator is realized, the installation is convenient, and the operation is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of actuators, in particular to a butterfly valve actuator with good sealing performance. Background Art

[0002] The actuator is an essential component of an automatic control system. Its function is to receive control signals from the controller and change the size of the controlled medium, thereby maintaining the controlled variable at the desired value or within a certain range. Actuators can be divided into three categories based on their energy source: pneumatic, hydraulic, and electric. Pneumatic actuators use compressed air as their energy source and are characterized by simple structure, reliable and stable operation, high output thrust, easy maintenance, fire and explosion resistance, and low price. Therefore, they are widely used in production processes such as chemical, papermaking, and oil refining, and can be easily used in conjunction with passive instruments.

[0003] The existing pneumatic actuator and butterfly valve are fixed to the bottom of the pneumatic actuator by bolts. The bolt connection method makes installation inconvenient and prone to thread slippage. The connection between the flange and the pneumatic actuator is usually sealed with a sealing ring. Due to the gap in the connection, the sealing ring is easily aged and the sealing performance is reduced. Therefore, a butterfly valve actuator with good sealing performance is needed to meet the demand. Summary of the Invention

[0004] The purpose of the present utility model is to provide a butterfly valve actuator with good sealing performance to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a butterfly valve actuator with good sealing performance, comprising a butterfly valve and a pneumatic actuator, the butterfly valve being connected to a flange, a first sealing ring being provided on the flange, a joint being connected to the bottom end of the pneumatic actuator, a socket being provided on the bottom end of the joint, a second sealing ring being provided in the socket, the flange being arranged in the socket, an annular groove being provided on the outer wall of the joint, a spring being connected to the inner wall at the top end of the annular groove, a collar being connected to the spring, a tapered hole being provided in the collar, the joint being located in the side wall of the annular groove and being slidably connected to a plurality of trapezoidal blocks, the inclined surface of one end of the trapezoidal block being adapted to the tapered hole, and the inclined surface of the other end being in contact with the bottom of the flange.

[0006] Preferably, the jack is connected to a plurality of positioning pins, and the flange is provided with a plurality of screw holes, and each positioning pin is respectively inserted into a screw hole at a corresponding position.

[0007] Preferably, the annular groove does not pass through both ends of the joint, but is arranged in the middle of the joint.

[0008] Preferably, a plurality of anti-slip grooves are provided on the outer wall of the collar, and the anti-slip grooves are arranged in sequence along the axial direction of the collar.

[0009] Preferably, a limiting ring is connected to the bottom end of the collar, and the outer diameter of the limiting ring is the same as the outer diameter of the collar, and the inner diameter is the same as the outer diameter of the joint.

[0010] Preferably, a plurality of sliding holes are provided on the side wall of the annular groove of the joint, the sliding holes penetrate into the insertion hole, and a plurality of trapezoidal blocks are slidably connected in the sliding holes.

[0011] Preferably, the end of the trapezoidal block facing away from the flange is slightly inclined, and tilts from top to bottom from the inside to the outside of the joint.

[0012] The beneficial effects of the utility model are:

[0013] In the utility model, the joint, spring, collar and trapezoidal block cooperate with each other, so that under the action of the spring force, the tapered hole in the collar is always in contact with the trapezoidal block, thereby generating a thrust for pushing the trapezoidal block into the socket, and the other end of the trapezoidal block is inclined against the bottom end of the flange to generate a thrust for pushing into the socket, so that the contact between the flange and the socket is tighter, thereby realizing a sealed connection between the butterfly valve and the pneumatic actuator, and the utility model is easy to install and simple to operate.

[0014] In the utility model, the first sealing ring and the second sealing ring are placed inside the insertion hole by opening the insertion hole to prevent exposure to the outside world, effectively avoiding aging of the first sealing ring and the second sealing ring, and further ensuring the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of a butterfly valve actuator with good sealing performance proposed by the utility model;

[0016] Figure 2 This is a front cross-sectional structural diagram of a butterfly valve actuator with good sealing performance proposed by the utility model;

[0017] Figure 3 This utility model proposes a butterfly valve actuator with good sealing performance Figure 2 A in the middle is an enlarged structural diagram;

[0018] Figure 4 This is a schematic diagram of the butterfly valve structure of a butterfly valve actuator with good sealing performance proposed by the utility model;

[0019] Figure 5 This is a schematic diagram of the explosion structure at the joint of a butterfly valve actuator with good sealing performance proposed by the utility model.

[0020] In the figure: 1. Butterfly valve; 2. Pneumatic actuator; 3. Flange; 4. First sealing ring; 5. Connector; 6. Socket; 7. Second sealing ring; 8. Ring groove; 9. Spring; 10. Ring; 11. Tapered hole; 12. Trapezoidal block; 13. Locating pin; 14. Screw hole; 15. Anti-slip groove; 16. Limit ring; 17. Sliding hole. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-5 A butterfly valve actuator with good sealing performance includes a butterfly valve 1 and a pneumatic actuator 2. The butterfly valve 1 is connected to a flange 3, and a first sealing ring 4 is provided on the flange 3. The bottom end of the pneumatic actuator 2 is connected to a joint 5, and a socket 6 is provided on the bottom end of the joint 5. A second sealing ring 7 is provided in the socket 6. The flange 3 is arranged in the socket 6. An annular groove 8 is provided on the outer wall of the joint 5, and a spring 9 is connected to the inner wall of the top end of the annular groove 8. A collar 10 is connected to the spring 9, and a tapered hole 11 is provided in the collar 10. The joint 5 is located in the side wall of the annular groove 8 and is slidably connected to a plurality of trapezoidal blocks 12. The inclined surface of one end of the trapezoidal block 12 is adapted to the tapered hole 11, and the inclined surface of the other end contacts the bottom of the flange 3.

[0023] Through the cooperation among the joint 5, spring 9, collar 10 and trapezoidal block 12, the collar 10 is under the elastic force of the spring 9, and the tapered hole 11 in the collar 10 is always in contact with the trapezoidal block 12, thereby generating a thrust for pushing the trapezoidal block 12 into the socket 6. The other end of the trapezoidal block 12 is inclined against the bottom end of the flange 3 to generate a thrust for pushing into the socket 6, thereby making the contact between the flange 3 and the socket 6 closer, realizing a sealed connection between the butterfly valve 1 and the pneumatic actuator 2, and convenient installation and simple operation. By opening the socket 6, the first sealing ring 4 and the second sealing ring 7 are placed inside the socket 6 to prevent exposure to the outside world, effectively avoiding the aging of the first sealing ring 4 and the second sealing ring 7, and further ensuring the sealing effect.

[0024] Specifically, in this embodiment, a plurality of positioning pins 13 are connected to the socket 6, and a plurality of screw holes 14 are provided on the flange 3. Each positioning pin 13 is respectively inserted into the screw hole 14 at the corresponding position, and the original screw hole 14 on the flange 3 is retained. The positioning pins 13 are provided to provide positioning for the insertion of the flange 3 to prevent rotation between the pneumatic actuator 2 and the butterfly valve 1.

[0025] Specifically, in this embodiment, the annular groove 8 does not pass through both ends of the joint 5, and is arranged in the middle of the joint 5. The inner wall of one end of the annular groove 8 provides compression and rebound support for the spring 9, and the other end provides a limit for the ring 10 to prevent the elastic force of the spring 9 from pushing the ring 10 out of the annular groove 8.

[0026] Specifically, in this embodiment, a plurality of anti-slip grooves 15 are provided on the outer wall of the collar 10 . The anti-slip grooves 15 are arranged in sequence along the axial direction of the collar 10 to prevent the collar 10 from slipping when being pushed to move.

[0027] Specifically, in this embodiment, a limiting ring 16 is connected to the bottom end of the ring 10. The outer diameter of the limiting ring 16 is the same as the outer diameter of the ring 10, and the inner diameter is the same as the outer diameter of the joint 5. The limiting ring 16 provides a limit for the outward movement of the trapezoidal block 12 to prevent the trapezoidal block 12 from separating from the joint 5.

[0028] Specifically, in this embodiment, a plurality of sliding holes 17 are provided on the side wall of the annular groove 8 of the connector 5 , and the sliding holes 17 extend into the insertion hole 6 . A plurality of trapezoidal blocks 12 are respectively slidably connected in the sliding holes 17 , providing a stable movement guide for the trapezoidal blocks 12 .

[0029] Specifically, in this embodiment, the end of the trapezoidal block 12 facing away from the flange 3 is slightly inclined, and tilts from top to bottom from the inside of the joint 5 to the outside, so that the trapezoidal block 12 can move outward when the flange 3 is inserted into the insertion hole 6.

[0030] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A butterfly valve actuator with good sealing performance, comprising a butterfly valve (1) and a pneumatic actuator (2), characterized in that: The butterfly valve (1) is connected to a flange (3), and a first sealing ring (4) is provided on the flange (3). The bottom end of the pneumatic actuator (2) is connected to a joint (5), and a socket (6) is provided on the bottom end of the joint (5). A second sealing ring (7) is provided in the socket (6). The flange (3) is arranged in the socket (6). An annular groove (8) is provided on the outer wall of the joint (5), and a spring (9) is connected to the inner wall of the top end of the annular groove (8). A collar (10) is connected to the spring (9), and a tapered hole (11) is provided in the collar (10). The joint (5) is located in the side wall of the annular groove (8) and is slidably connected to a plurality of trapezoidal blocks (12). The inclined surface of one end of the trapezoidal block (12) is adapted to the tapered hole (11), and the inclined surface of the other end contacts the bottom of the flange (3).

2. A butterfly valve actuator with good sealing performance according to claim 1, characterized in that: The jack (6) is connected to a plurality of positioning pins (13), and the flange (3) is provided with a plurality of screw holes (14). Each positioning pin (13) is respectively inserted into a screw hole (14) at a corresponding position.

3. The butterfly valve actuator with good sealing performance according to claim 1, characterized in that: The annular groove (8) does not penetrate both ends of the joint (5) and is arranged in the middle of the joint (5).

4. The butterfly valve actuator with good sealing performance according to claim 1, characterized in that: A plurality of anti-slip grooves (15) are provided on the outer wall of the collar (10), and the anti-slip grooves (15) are arranged in sequence in the axial direction of the collar (10).

5. The butterfly valve actuator with good sealing performance according to claim 1, characterized in that: A limiting ring (16) is connected to the bottom end of the collar (10), and the outer diameter of the limiting ring (16) is the same as the outer diameter of the collar (10), and the inner diameter is the same as the outer diameter of the joint (5).

6. The butterfly valve actuator with good sealing performance according to claim 1, characterized in that: The joint (5) is provided with a plurality of sliding holes (17) on the side wall of the annular groove (8), the sliding holes (17) extending through the insertion hole (6), and the plurality of trapezoidal blocks (12) are respectively slidably connected in the sliding holes (17).

7. The butterfly valve actuator with good sealing performance according to claim 1, characterized in that: The end of the trapezoidal block (12) facing away from the flange (3) is slightly inclined, and is inclined from top to bottom from the inside to the outside of the joint (5).

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