Butterfly valve with mechanical locking

Abstract

The utility model relates to pneumatically operated butterfly valve technical field's a kind of butterfly valve with mechanical locking, including valve body, actuator and butterfly valve body, the inside of valve body is hollow valve cavity, the top of butterfly valve body extends to the inside of actuator and penetrates valve body, the bottom of butterfly valve body is the valve flap portion of plate block, valve flap portion is rotatably arranged in the inside of valve cavity by actuator, both end surfaces of valve flap portion are equipped with the locking lug that protrudes to end surface one side, locking lug is arranged at the edge of valve flap portion, locking lug is arranged in the structure of center symmetry along the plane where valve flap portion is, the side wall of locking lug can form the structure of locking limit with the inner wall of valve cavity, to support butterfly valve body in high-pressure fluid pipeline and form stable sealing structure.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic butterfly valve technology, and in particular to a butterfly valve with mechanical locking. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that can be used for on / off control of low-pressure pipeline media. A butterfly valve is a type of valve in which the closing element (valve disc or butterfly plate) is a disc that rotates around the valve shaft to achieve opening and closing.

[0003] Existing pneumatic butterfly valves consist of a pneumatic actuator and a butterfly valve. A pneumatic butterfly valve uses a circular disc that rotates with the valve stem to open and close, achieving the activation action. It is primarily used as a shut-off valve, but can also be designed to have regulating or shut-off / regulating functions. Butterfly valves are increasingly used in low-pressure, large- and medium-diameter pipelines. However, in pipelines carrying high-pressure fluids, because the disc valve core of the pneumatic butterfly valve is directly driven by the pneumatic actuator, when the fluid pressure in the pipeline exceeds the air pressure inside the actuator, the butterfly valve is prone to misalignment and loosening. This makes pneumatic butterfly valves unsuitable for installation in high-pressure fluid pipelines. Therefore, there is an urgent need to develop a butterfly valve with mechanical locking to meet practical application requirements. Utility Model Content

[0004] The purpose of this invention is to provide a butterfly valve with mechanical locking to solve the above-mentioned defects.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A butterfly valve with mechanical locking includes a valve body, an actuator, and a butterfly valve body. The valve body has a hollow valve cavity inside. The top of the butterfly valve body extends through the valve body to the interior of the actuator. The bottom of the butterfly valve body is a plate-shaped valve disc. The valve disc is rotatably mounted inside the valve cavity via the actuator. Both ends of the valve disc are provided with locking protrusions that protrude to one side of the end face. The locking protrusions are located at the edge of the valve disc and are arranged in a centrally symmetrical structure along the plane of the valve disc. The sidewalls of the locking protrusions can form a locking and limiting structure with the inner wall of the valve cavity.

[0007] As a further embodiment of the above description, the side of the locking protrusion closest to the valve cavity has an arc-shaped structure, and when the side wall of the locking protrusion abuts against the valve cavity, the side wall of the locking protrusion fits against the inner wall of the valve cavity.

[0008] In the above description, as a further embodiment, the top of the butterfly valve body is the valve stem, which extends through the valve body into the interior of the actuator. The valve disc is symmetrically arranged on both sides of the valve stem, and the locking protrusion is centrally symmetrical along the axis of the valve stem.

[0009] As a further solution described above, the valve disc and the locking protrusion are integrally formed.

[0010] As a further embodiment of the above description, the actuator has a horizontally arranged stroke cavity inside, and a drive mechanism is installed inside the stroke cavity. The drive mechanism is connected to the top of the butterfly valve body for transmission.

[0011] In the above description, as a further embodiment, the drive mechanism includes two pistons and a drive shaft. An air pump is also provided on one side of the actuator. The two pistons are arranged in a centrally symmetrical structure along the axis of the drive shaft. The tail ends of the two pistons are movably connected to the drive shaft. The drive shaft is used to drive the butterfly valve body to rotate, and the air pump is used to inject gas medium into the stroke cavity to push the piston to move along the axis of the stroke cavity.

[0012] As a further embodiment of the above description, the drive shaft has a horizontally protruding drive disc in the middle, and a clearance groove is provided in the middle of the drive disc. One end of the clearance groove is located at the edge of the drive disc, and the other end of the clearance groove extends to the center of the drive disc. The piston is a shift finger at the end near the drive disc, and a pin is provided in the middle of the shift finger. The pin is embedded in the clearance groove and can move horizontally along the trajectory of the clearance groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: By providing locking protrusions on both ends of the valve disc portion inside the valve body, which is located inside the valve cavity, the sidewalls of the locking protrusions can form a locking and limiting structure with the inner wall of the valve cavity. In the structure of this application, since the locking protrusions can be located on the inner wall of the valve cavity to form a locking and limiting structure, the butterfly valve body is supported to form a stable and sealed structure in the high-pressure fluid pipeline. Moreover, the locking protrusions are arranged in a centrally symmetrical structure along the plane where the valve disc portion is located, so that the locking protrusions form a void-avoiding structure when the butterfly valve body is opened, ensuring the normal opening of the valve body. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a butterfly valve with mechanical locking as described in this embodiment;

[0015] Figure 2 for Figure 1 A magnified schematic diagram of the structure of part A in the diagram;

[0016] Figure 3 This is a cross-sectional view of a butterfly valve with mechanical locking as described in this embodiment;

[0017] Figure 4 This is a schematic diagram of the first state of the drive mechanism described in this embodiment;

[0018] Figure 5This is a schematic diagram of the second state of the drive mechanism described in this embodiment;

[0019] Figure 6 This is a cross-sectional view of the valve body and butterfly valve body in a horizontal position as described in this embodiment;

[0020] In the diagram: 1-valve body, 11-valve chamber, 2-actuator, drive mechanism, 21-stroke chamber, 22-piston, 221-flicker finger, 23-drive shaft, 24-drive disc, 241-avoiding groove, 242-pin, 3-air pump, 4-butterfly valve body, 41-valve disc, 42-valve stem, 43-locking protrusion. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] For this embodiment, please refer to Figures 1-4 The specific implementation of the butterfly valve with mechanical locking includes a valve body 1, an actuator 12, and a butterfly valve body 4. The valve body 1 has a hollow valve cavity 11 inside. The top of the butterfly valve body 4 extends through the valve body 1 into the interior of the actuator 12. The bottom of the butterfly valve body 4 is a plate-shaped valve disc 41. The valve disc 41 is rotatably disposed inside the valve cavity 11 via the actuator 12. Both ends of the valve disc 41 are provided with locking protrusions 43 protruding to one side of the end face. The locking protrusions 43 are disposed at the edge of the valve disc 41. The locking protrusions 43 are arranged in a centrally symmetrical structure along the plane where the valve disc 41 is located. The side wall of the locking protrusions 43 can form a locking and limiting structure with the inner wall of the valve cavity 11.

[0023] Specifically, such as Figure 2 and Figure 6 As shown, inside the valve body 1, locking protrusions 43 protruding to one end face are provided on both ends of the valve disc portion 41 located inside the valve cavity 11 of the butterfly valve body 4. This allows the side wall of the locking protrusion 43 to form a locking and limiting structure with the inner wall of the valve cavity 11. In the structure of this application, since the locking protrusion 43 can be located on the inner wall of the valve cavity 11 to form a locking and limiting structure, it supports the butterfly valve body 4 to form a stable sealed structure in the high-pressure fluid pipeline. Moreover, the locking protrusion 43 is arranged in a centrally symmetrical structure along the plane where the valve disc portion 41 is located, so that the locking protrusion 43 forms a void-avoiding structure when the butterfly valve body 4 is opened, ensuring the normal opening of the valve body 1.

[0024] Specifically, such as Figure 6As shown, the locking protrusion 43 has an arc-shaped structure on the side near the valve cavity 11, and when the side wall of the locking protrusion 43 abuts against the valve cavity 11, the side wall of the locking protrusion 43 fits against the inner wall of the valve cavity 11. The valve disc part 41 and the locking protrusion 43 are integrally formed. The top of the butterfly valve body 4 is the valve stem part 42, which extends through the valve body 1 into the interior of the actuator 12. The valve disc part 41 is symmetrically arranged on both sides of the valve stem part 42, and the locking protrusion 43 is centrally symmetrical along the axis of the valve stem part 42.

[0025] In a one-step solution, such as Figure 4-5 As shown, the actuator 12 has a horizontally arranged stroke cavity 21 inside, and a drive mechanism is provided inside the stroke cavity 21. The drive mechanism is connected to the top of the butterfly valve body 4 for transmission.

[0026] The drive mechanism includes two pistons 22 and a drive shaft 23. An air pump 3 is also provided on one side of the actuator 12. The two pistons 22 are arranged in a centrally symmetrical structure along the axis of the drive shaft 23. The tail ends of the two pistons 22 are movably connected to the drive shaft 23. The drive shaft 23 is used to drive the butterfly valve body 4 to rotate. The air pump 3 is used to inject gas medium into the stroke cavity 21 to push the pistons 22 to move along the axis of the stroke cavity 21.

[0027] The drive shaft 23 has a horizontally protruding drive disc 24 in the middle, and a clearance groove 241 is opened in the middle of the drive disc 24. One end of the clearance groove 241 is opened at the edge of the drive disc 24, and the other end of the clearance groove 241 extends to the center of the drive disc 24. The piston 22 has a shift finger 221 at the end near the drive disc 24. A pin 242 is provided in the middle of the shift finger 221. The pin 242 is embedded in the clearance groove 241 and can move horizontally along the trajectory of the clearance groove 241.

[0028] The working process of a butterfly valve with mechanical locking is as follows: gas medium is injected into the stroke chamber 21 by the air pump 3, which pushes the piston 22 to move along the axis of the stroke chamber 21. The piston 22 moves horizontally to one side of the drive shaft 23. At the same time, the pin 242 of the other end of the piston 22 can push the drive disc 24 to rotate around the drive shaft 23. The drive shaft 23 and the drive disc 24 rotate synchronously, which drives the butterfly valve body 4 to rotate. The valve disc 41 can rotate away from the locking protrusion 43, so that the side wall of the locking protrusion 43 can form a locking and limiting structure with the inner wall of the valve chamber 11, which supports the butterfly valve body 4 to form a stable sealed state in the high-pressure fluid pipeline.

[0029] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A butterfly valve with mechanical locking, comprising a valve body, an actuator, and a butterfly valve body, characterized in that: The valve body has a hollow valve cavity inside. The top of the butterfly valve body extends through the valve body to the inside of the actuator. The bottom of the butterfly valve body is a plate-shaped valve disc. The valve disc is rotatably mounted inside the valve cavity via the actuator. Both ends of the valve disc are provided with locking protrusions that protrude to one side of the end face. The locking protrusions are located at the edge of the valve disc. The locking protrusions are arranged in a centrally symmetrical structure along the plane where the valve disc is located. The sidewalls of the locking protrusions can form a locking and limiting structure with the inner wall of the valve cavity.

2. A butterfly valve with mechanical locking according to claim 1, characterized in that: The locking protrusion has an arc-shaped structure on the side near the valve cavity, and when the side wall of the locking protrusion abuts against the valve cavity, the side wall of the locking protrusion fits against the inner wall of the valve cavity.

3. A butterfly valve with mechanical locking according to claim 1, characterized in that: The top of the butterfly valve body is the valve stem, which extends through the valve body into the interior of the actuator. The valve disc is symmetrically arranged on both sides of the valve stem, and the locking protrusion is centrally symmetrical along the axis of the valve stem.

4. A butterfly valve with mechanical locking according to claim 1, characterized in that: The valve disc and the locking protrusion are integrally formed.

5. A butterfly valve with mechanical locking according to any one of claims 1-4, characterized in that: The actuator has a horizontally arranged stroke cavity inside, and a drive mechanism is installed inside the stroke cavity. The drive mechanism is connected to the top of the butterfly valve body for transmission.

6. A butterfly valve with mechanical locking according to claim 5, characterized in that: The drive mechanism includes two pistons and a drive shaft. An air pump is also provided on one side of the actuator. The two pistons are arranged in a centrally symmetrical structure along the axis of the drive shaft. The tail ends of the two pistons are movably connected to the drive shaft. The drive shaft is used to drive the butterfly valve body to rotate, and the air pump is used to inject gas medium into the stroke cavity to push the piston to move along the axis of the stroke cavity.

7. A butterfly valve with mechanical locking according to claim 6, characterized in that: The drive shaft has a horizontally protruding drive disc in the middle, and a clearance groove is opened in the middle of the drive disc. One end of the clearance groove is opened at the edge of the drive disc, and the other end of the clearance groove extends to the center of the drive disc. The piston is a shift finger at the end near the drive disc, and a pin is provided in the middle of the shift finger. The pin is embedded in the clearance groove and can move horizontally along the trajectory of the clearance groove.

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