Butterfly door opening mechanism

Abstract

The utility model provides a butterfly door opening mechanism, which comprises a driving component, and the driving component comprises a rotating seat coaxially connected with an impeller, a guide seat slidably mounted on the rotating seat, and a linkage structure respectively connected with the rotating seat and the guide seat, the guide seat is movably arranged in the direction close to or away from the butterfly door. One end of the transmission connecting rod is hinged to the guide seat, and the end, away from the guide seat, of the transmission connecting rod is hinged to the valve body cross beam; and the fork-shaped frame is installed on the transmission connecting rod, the fork-shaped frame comprises a first main body and a second main body which are oppositely arranged, so that the transmission connecting rod is driven to swing through the guide seat, and the first main body and the second main body abut against the two door bodies correspondingly. The butterfly door opening mechanism solves the technical problems that in the prior art, a butterfly door opening mechanism is poor in opening reliability, and wind resistance is large due to the fact that a butterfly valve is not completely opened under high negative pressure.

Description

Technical Field

[0001] This utility model relates to the field of fan butterfly valve technology, specifically to a butterfly door opening mechanism. Background Technology

[0002] Fans are widely used in the livestock industry for ventilation, cooling, and other functions in livestock sheds, and are considered key equipment. A fan butterfly valve is a valve specifically designed to regulate and control airflow from fans, typically used in gas delivery pipelines within livestock sheds. It uses one or more valve bodies forming a disc-shaped valve plate (i.e., a "butterfly plate") to open, close, or regulate airflow within the pipeline.

[0003] The commonly used butterfly door opening devices in the existing technology have the following problems: the butterfly valves of the air duct fan are mostly opened by wind power, and the tension spring reset structure cannot fully open the butterfly valve under high negative pressure, resulting in high wind resistance and low air volume in the gas delivery pipeline, which affects the performance of the fan; some high-end fans use electric drive butterfly valves to open, which can be fully opened under negative pressure, but because they use electric actuators and transmission structures, they have poor reliability and high cost.

[0004] Therefore, there is a lack of existing technologies for a butterfly valve opening mechanism that can be fully opened under high negative pressure, and is low in cost, stable and reliable.

[0005] Therefore, existing technologies need further development. Utility Model Content

[0006] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a butterfly door opening mechanism to solve the technical problems of poor opening reliability of butterfly door opening mechanisms in related technologies and high wind resistance caused by incomplete opening of the butterfly valve under high negative pressure.

[0007] To achieve the above technical objectives, the present invention adopts the following technical solution: A butterfly door opening mechanism is provided. The butterfly door includes a valve body beam and two door bodies that rotate around the valve body beam. The butterfly door opening mechanism includes: a driving component, comprising a rotating seat coaxially connected to an impeller, a guide seat slidably mounted on the rotating seat, and a linkage structure respectively connected to the rotating seat and the guide seat. The guide seat is movably arranged along the direction approaching or away from the butterfly door; a transmission link, one end of which is hinged to the guide seat, and the other end of which is hinged to the valve body beam away from the guide seat; and a fork-shaped frame, mounted on the transmission link, comprising a first main body and a second main body arranged opposite to each other. The first main body and the second main body are respectively abutting against the two door bodies, so that the transmission link is oscillating via the guide seat, causing the first main body and the second main body to abut against the two door bodies respectively.

[0008] Furthermore, the driving component includes a connecting seat, which is rotatably mounted on a guide seat. The connecting seat is provided with two spaced-apart first hinge portions, the extension direction of which is the same as the movement direction of the guide seat. The end of the transmission link near the driving component is hinged between the two first hinge portions by the same pin.

[0009] Furthermore, the butterfly door opening mechanism includes a mounting base, which is mounted on the valve body beam, and a transmission connecting rod is hinged to one end of the mounting base away from the valve body beam.

[0010] Furthermore, the end of the mounting base away from the transmission connecting rod is provided with two opposing support legs, which are fixedly connected to the valve body crossbeam respectively.

[0011] Furthermore, the transmission linkage includes: a push rod, one end of which is hinged to a guide seat; a first transmission rod, the extension direction of which is set with a first preset angle to the extension direction of the push rod, the first end of which is hinged to the push rod, the second end of which is hinged to a mounting seat, and a fork-shaped frame fixedly installed between the first end and the second end of the first transmission rod, the extension direction of which is set with a second preset angle to the extension direction of the first transmission rod.

[0012] Furthermore, the fork frame includes a first fork frame, the first fork frame includes a first connecting part fixedly mounted on the first transmission rod, the extension direction of the first connecting part is perpendicular to the first transmission rod, and a first main body and a second main body are respectively provided at both ends of the first connecting part.

[0013] Furthermore, the transmission linkage includes: a push rod, one end of which is hinged to a guide seat; a second transmission rod, the extension direction of which is provided with a third preset angle with the extension direction of the push rod, the first end of which is hinged to the push rod, the second end of which is movably connected to the fork-shaped frame, and a mounting seat hinged between the first end and the second end of the second transmission rod, the fork-shaped frame extending along the direction close to the two door bodies.

[0014] Furthermore, the fork frame includes a second fork frame, and a second connecting part is provided at one end of the second fork frame near the second transmission rod. A sliding groove is provided on the second connecting part, and the sliding groove is slidably connected to a sliding rod fixed on the second transmission rod. A first body and a second body are provided at one end of the second fork frame away from the second connecting part.

[0015] Furthermore, the second fork-shaped frame is provided with a third hinge portion, which is located between the first main body and the second main body and the second connecting portion, and is hinged to the valve body crossbeam.

[0016] Beneficial effects:

[0017] This application provides a low-cost and reliable mechanical butterfly valve opening mechanism for a fan. The mechanical structure offers greater reliability and lower cost. The butterfly valve opening mechanism allows it to fully open under negative pressure. Simultaneously, the mechanism opens when the fan starts and closes when the fan stops. The butterfly valve is opened by the power of the fan impeller, eliminating the need for an additional power source, thus saving energy and reducing cost. This solves the technical problems of poor opening reliability and high wind resistance caused by incomplete opening of the butterfly valve under high negative pressure in related technologies. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the first embodiment of the butterfly door opening mechanism used in this utility model embodiment;

[0019] Figure 2 This is a front view of the first embodiment of the butterfly door opening mechanism used in this utility model embodiment;

[0020] Figure 3 This is a schematic diagram of the second embodiment of the butterfly door opening mechanism used in this utility model.

[0021] Figure 4 This is a schematic diagram of the butterfly door in the closed state of the first embodiment of the butterfly door opening mechanism used in this utility model embodiment;

[0022] Figure 5 This is a schematic diagram of the butterfly door in the opening process of the first embodiment of the butterfly door opening mechanism used in this utility model embodiment;

[0023] Figure 6 This is a schematic diagram of the butterfly door in the open state of the first embodiment of the butterfly door opening mechanism used in this utility model embodiment;

[0024] Figure 7 This is a schematic diagram of the butterfly door in the closed state of the second embodiment of the butterfly door opening mechanism used in this utility model embodiment;

[0025] Figure 8 This is a schematic diagram of the butterfly door in the opening process of the second embodiment of the butterfly door opening mechanism used in this utility model embodiment;

[0026] Figure 9 This is a schematic diagram of the butterfly door in the open state, representing the second embodiment of the butterfly door opening mechanism used in this utility model.

[0027] The above figures include the following reference numerals:

[0028] 10. Valve body crossbeam; 20. Door body; 1. Drive component; 11. Rotating seat; 12. Guide seat; 13. Connecting seat; 2. Transmission link; 21. Push rod; 22. First transmission rod; 23. Second transmission rod; 231. Sliding rod; 3. Fork-shaped frame; 31. First fork-shaped frame; 311. First main body; 312. Second main body; 313. First connecting part; 32. Second fork-shaped frame; 321. Second connecting part; 322. Slide groove; 323. Third hinge part; 4. Mounting seat; 41. Support leg; 5. Centrifugal mechanism. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0030] Example 1

[0031] According to an embodiment of this utility model, a butterfly door opening mechanism is provided. Please refer to [link / reference]. Figure 1 , 2 as well as Figure 4-6 The butterfly door includes a valve body beam 10 and two door bodies 20 that rotate around the valve body beam 10. The butterfly door opening mechanism includes: a drive component 1, which includes a rotating seat 11 coaxially connected to an impeller, a guide seat 12 slidably mounted on the rotating seat 11, and a linkage structure connected to the rotating seat 11 and the guide seat 12 respectively. The guide seat 12 is movably arranged in a direction close to or away from the butterfly door; a transmission link 2, one end of which is hinged to the guide seat 12, and the other end of which is hinged to the valve body beam 10 away from the guide seat 12; and a fork-shaped frame, which is mounted on the transmission link 2. The fork-shaped frame includes a first body 311 and a second body 312 arranged opposite to each other. The first body 311 and the second body 312 are respectively abutting against the two door bodies 20 so that the transmission link 2 can swing through the guide seat 12, so that the first body 311 and the second body 312 abut against the two door bodies 20 respectively.

[0032] Specifically, the linkage structure includes a first connecting rod hinged to both sides of the rotating seat 11, a second connecting rod hinged to the other end of the first connecting rod, and a centrifugal mechanism 5 hinged to the other end of the second connecting rod. The rotating seat 11 is fixed to the impeller and rotates synchronously with the impeller. The butterfly door structure is a conventional structure. The guide seat 12 is located at the center of the rotating seat 11. The first connecting rod is hinged to the outside of the rotating seat 11 by a pin. The first connecting rod and the second connecting rod are hinged by a pin. The second connecting rod is hinged to the guide seat 12 by a pin. The centrifugal mechanism 5 is located on the outside of the end of the first connecting rod away from the rotating seat 11. The centrifugal mechanism 5 is cylindrical.

[0033] Specifically, the door body 20 is also equipped with an elastic mechanism for driving the door body 20 to close. This mechanism includes tension springs installed on the two door bodies 20 respectively. The other ends of the two tension springs are connected to the valve body beam 10. When the fan is turned off, the centrifugal mechanism 5 is in a free state, and the door body 20 closes under the action of the elastic mechanism.

[0034] When the fan starts, the impeller rotates, and the rotating seat 11, the first connecting rod, the second connecting rod and the guide seat 12 on the rotating seat 11 rotate with the impeller. Under the action of centrifugal force, the centrifugal mechanism 5 moves outward and drives the first connecting rod and the second connecting rod to swing, pushing the guide seat 12 to move closer to the door body 20. The transmission connecting rod 2, which is hinged on the connecting seat 13, moves closer to the door body 20 and swings, thereby causing the fork frame to swing, so that the first body 311 and the second body 312 push the two doors 20 respectively, so that the butterfly valve can be fully opened under negative pressure.

[0035] This application presents a low-cost and reliable mechanical fan butterfly valve opening mechanism, effectively solving the problem of incomplete opening of spring-loaded butterfly valves under high pressure. It improves fan performance by over 8%. Compared to electric butterfly valves, which suffer from high failure rates and high costs, the mechanical structure of this application is more reliable and cost-effective. The opening mechanism allows the butterfly valve to fully open under negative pressure. Simultaneously, the opening mechanism opens with the fan and closes when the fan stops. The butterfly valve is opened by the power of the fan impeller, eliminating the need for an additional power source, saving energy, reducing costs, and improving the success rate of butterfly valve opening. This solves the technical problems of poor opening reliability and high wind resistance caused by incomplete opening of the butterfly valve under high negative pressure in related technologies.

[0036] In the butterfly door opening mechanism of this embodiment, see Figure 2The drive component 1 includes a connecting seat 13, which is rotatably mounted on the guide seat 12. The connecting seat 13 has two spaced-apart first hinge portions, the extension direction of which is the same as the movement direction of the guide seat 12. The end of the transmission link 2 closest to the drive component 1 is hinged between the two first hinge portions via the same pin. Thus, the connecting seat 13 can rotate relative to the guide seat 12, while the guide seat 12 rotates, the connecting seat 13 remains stationary, thereby completing the door opening action.

[0037] In the butterfly door opening mechanism of this embodiment, see Figure 1 The butterfly door opening mechanism includes a mounting base 4, which is mounted on the valve body beam 10. A transmission link 2 is hinged to one end of the mounting base 4 away from the valve body beam 10. By setting the mounting base 4, the transmission link 2 is hinged to the mounting base 4, giving the transmission link 2 a fixed movement trajectory, thereby completing the door opening action.

[0038] In the butterfly door opening mechanism of this embodiment, see Figure 1 The mounting base 4 has two opposing support legs 41 at the end furthest from the transmission connecting rod 2, and the two support legs 41 are fixedly connected to the valve body crossbeam 10. By setting the support legs 41, the mounting base 4 is fixedly connected to the valve body crossbeam 10.

[0039] In the butterfly door opening mechanism of this embodiment, see Figure 1-2 The transmission linkage 2 includes: a push rod 21, one end of which is hinged to the guide seat 12; a first transmission rod 22, the extension direction of which is set at a first preset angle with the extension direction of the push rod 21; the first end of the first transmission rod 22 is hinged to the push rod 21; the second end of the first transmission rod 22 is hinged to the mounting base 4; a fork-shaped bracket is fixedly installed between the first end and the second end of the first transmission rod 22; the extension direction of the fork-shaped bracket is set at a second preset angle with the extension direction of the first transmission rod 22. With the above configuration, when the guide seat 12 moves towards the butterfly door, the guide seat 12 pushes the push rod 21 forward, and the push rod 21 swings, causing the first transmission rod 22 to swing as well. This allows the fork-shaped bracket to abut against the door body 20. The guide seat 12 continues to move forward, causing the fork-shaped bracket to continue moving forward, fully opening the door body 20, thereby fully opening the butterfly valve.

[0040] In the butterfly door opening mechanism of this embodiment, see Figure 2The fork-shaped frame includes a first fork-shaped frame 31, which includes a first connecting portion 313 fixedly mounted on the first transmission rod 22. The extending direction of the first connecting portion 313 is perpendicular to the first transmission rod 22. A first main body 311 and a second main body 312 are respectively provided at both ends of the first connecting portion 313. In this way, the first fork-shaped frame 31 forms a U-shaped structure, and the space between the first main body 311 and the second main body 312 can be used to accommodate the valve body beam 10 and part of the door body 20.

[0041] In some embodiments, the first body 311 and the second body 312 are respectively at a certain angle to the first connecting part 313, so that the first body 311 and the second body 312 can slide relative to the door body 20, thereby improving the smoothness and continuity of the door opening action.

[0042] The working process of the butterfly door opening mechanism in this embodiment is as follows: See Figure 4-6 When the fan starts, the impeller rotates, and the wind pushes the butterfly door open (but not fully open). The rotating seat 11, along with the first connecting rod, the second connecting rod, and the guide seat 12 on the rotating seat 11, rotate with the impeller. The connecting seat 13 does not rotate under the action of the transmission connecting rod 2. Under the action of centrifugal force, the centrifugal mechanism 5 moves outward, causing the first connecting rod and the second connecting rod to swing, pushing the guide seat 12 to move closer to the butterfly door. The connecting seat 13 then moves closer to the butterfly door, and the transmission connecting rod 2, hinged to the connecting seat 13, moves closer to the butterfly door. The butterfly valve moves and swings, the connecting seat 13 pushes the push rod 21 forward while the push rod 21 swings, and drives the first transmission rod 22 to swing, so that the first fork frame 31 abuts against the door body 20. The guide seat 12 continues to move forward, so that the first fork frame 31 continues to move forward. The first main body 311 and the second main body 312 respectively push the two door bodies 20, so that the butterfly valve can be fully opened under negative pressure. When the fan is turned off, the centrifugal mechanism 5 is in a free state, and the door body 20 is closed under the action of the elastic mechanism.

[0043] Example 2

[0044] In the butterfly door opening mechanism of this embodiment, see Figure 3The transmission linkage 2 includes: a push rod 21, one end of which is hinged to the guide seat 12; a second transmission rod 23, the extension direction of the second transmission rod 23 is provided with a third preset angle between the extension direction of the push rod 21, the first end of the second transmission rod 23 is hinged to the push rod 21, the second end of the second transmission rod 23 is movably connected to the fork frame, and a mounting seat 4 is hinged between the first end and the second end of the second transmission rod 23. The fork frame extends along the direction close to the two door bodies 20. With the above configuration, when the guide seat 12 moves towards the butterfly door, the guide seat 12 pushes the push rod 21 forward, and the push rod 21 also swings, causing the second transmission rod 23 to swing. The second end of the second transmission rod 23 moves away from the butterfly door, and the second end of the second transmission rod 23 pushes the fork-shaped frame to rotate. The first body 311 and the second body 312 move towards the butterfly door, so that the fork-shaped frame can come into contact with the door body 20. The guide seat 12 continues to move away from the butterfly door, so that the fork-shaped frame continues to move forward, so that the door body 20 is fully opened, thereby pushing the butterfly valve to fully open.

[0045] In the butterfly door opening mechanism of this embodiment, see Figure 3 The fork-shaped frame includes a second fork-shaped frame 32. A second connecting portion 321 is provided at one end of the second fork-shaped frame 32 near the second transmission rod 23. A sliding groove 322 is provided on the second connecting portion 321, and the sliding groove 322 is slidably connected to a sliding rod 231 fixedly mounted on the second transmission rod 23. A first main body 311 and a second main body 312 are provided at the end of the second fork-shaped frame 32 away from the second connecting portion 321. Thus, by swinging the second transmission rod 23, the second fork-shaped frame 32 can be moved towards or away from the butterfly door.

[0046] Specifically, when the guide seat 12 moves toward the butterfly door, it can push the second fork frame 32 toward the butterfly door, thereby pushing the butterfly door open.

[0047] In the butterfly door opening mechanism of this embodiment, see Figure 3 The second fork-shaped frame 32 is provided with a third hinge portion 323, which is located between the first main body 311, the second main body 312, and the second connecting portion 321. The third hinge portion 323 is hinged to the valve body crossbeam 10. In this way, the second fork-shaped frame 32 is hinged to the valve body crossbeam 10, thereby allowing the second fork-shaped frame 32 to reciprocate.

[0048] In some embodiments, the second fork-shaped frame 32 has an arc-shaped structure and extends toward the two door bodies 20.

[0049] The working process of the butterfly door opening mechanism in this embodiment is as follows: See Figure 7-9When the fan starts, the impeller rotates, and the wind pushes the butterfly door open (but not fully open). The rotating seat 11 and the first connecting rod, the second connecting rod and the guide seat 12 on the rotating seat 11 rotate with the impeller. The connecting seat 13 does not rotate under the action of the transmission connecting rod 2. Under the action of centrifugal force, the centrifugal mechanism 5 moves outward and drives the first connecting rod and the second connecting rod to swing, pushing the guide seat 12 to move closer to the butterfly door. The connecting seat 13 then moves closer to the butterfly door. The transmission connecting rod 2, which is hinged to the connecting seat 13, moves closer to the butterfly door and swings. The connecting seat 13 pushes the push rod 21 forward, and the push rod 21 also swings, driving the second transmission rod 23 to swing. The second end of the second transmission rod 23 moves away from the butterfly door. The second end of the second transmission rod 23 pushes the second fork frame 32 to rotate. The first body 311 and the second body 312 on the second fork frame 32 move closer to the butterfly door, so that the first body 311 and the second body 312 push the two door bodies 20 respectively, so that the butterfly valve can be fully opened under negative pressure. When the fan is turned off, the centrifugal mechanism 5 is in a free state, and the door 20 is closed by the action of the elastic mechanism.

[0050] 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. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0051] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0052] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0053] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0054] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A butterfly gate opening mechanism characterized by, The butterfly valve includes a valve beam (10) and two door bodies (20) rotating around the valve beam (10), and the butterfly valve opening mechanism includes: A driving component (1) includes a rotating seat (11) coaxially connected with an impeller, a guide seat (12) slidingly installed on the rotating seat (11), and a linkage structure connected with the rotating seat (11) and the guide seat (12) respectively, and the guide seat (12) is movably arranged along the direction close to or away from the butterfly valve; A transmission connecting rod (2) is hingedly connected at one end with the guide seat (12), and the other end of the transmission connecting rod (2) is hingedly connected with the valve beam (10); A fork frame is installed on the transmission connecting rod (2), the fork frame includes oppositely arranged first and second bodies (311) and (312), the first and second bodies (311) and (312) are respectively arranged in abuttable manner with the two door bodies (20) to make the first and second bodies (311) and (312) abut with the two door bodies (20) respectively by swinging the transmission connecting rod (2) driven by the guide seat (12).

2. The butterfly gate opening mechanism of claim 1, wherein The driving component (1) includes a connecting seat (13) rotatably installed on the guide seat (12), the connecting seat (13) is provided with two first hinge parts arranged at intervals, the extension direction of the first hinge part is the same as the moving direction of the guide seat (12), and the end of the transmission connecting rod (2) close to the driving component (1) is hingedly connected between the two first hinge parts through a same pin shaft.

3. The butterfly gate opening mechanism of claim 1, wherein The butterfly valve opening mechanism includes a mounting seat (4) mounted on the valve beam (10), and the mounting seat (4) is hingedly connected with the transmission connecting rod (2) at the end away from the valve beam (10).

4. The butterfly gate opening mechanism of claim 3, wherein, The end of the mounting seat (4) away from the transmission connecting rod (2) is provided with two oppositely arranged supporting legs (41), and the two supporting legs (41) are respectively fixedly connected with the valve beam (10).

5. The butterfly gate opening mechanism of claim 3, wherein, The transmission connecting rod (2) includes: A push rod (21) is hingedly connected at one end with the guide seat (12); A first transmission rod (22) is hingedly connected at a first end with the push rod (21), and a second end of the first transmission rod (22) is hingedly connected with the mounting seat (4), a first preset angle is arranged between the extension direction of the first transmission rod (22) and the extension direction of the push rod (21), and a second preset angle is arranged between the extension direction of the fork frame and the extension direction of the first transmission rod (22).

6. The butterfly gate opening mechanism of claim 5, wherein, The fork frame comprises a first fork frame (31), the first fork frame (31) comprises a first connecting part (313) fixedly arranged on the first transmission rod (22), the extension direction of the first connecting part (313) is perpendicular to the first transmission rod (22), and the two ends of the first connecting part (313) are respectively provided with the first main body (311) and the second main body (312).

7. The butterfly gate opening mechanism of claim 3, wherein The transmission connecting rod (2) comprises: A push rod (21), one end of the push rod (21) is hinged to the guide seat (12); A second transmission rod (23), a third preset included angle is arranged between the extension direction of the second transmission rod (23) and the extension direction of the push rod (21), the first end of the second transmission rod (23) is hinged to the push rod (21), the second end of the second transmission rod (23) is movably connected with the fork frame, the mounting seat (4) is hinged between the first end and the second end of the second transmission rod (23), and the fork frame extends along the direction close to the two door bodies (20).

8. The butterfly gate opening mechanism of claim 7, wherein, The fork frame comprises a second fork frame (32), the second fork frame (32) is provided with a second connecting part (321) close to one end of the second transmission rod (23), a sliding groove (322) is formed in the second connecting part (321), the sliding groove (322) is slidably connected with a sliding rod (231) fixedly arranged on the second transmission rod (23), and the second fork frame (32) is provided with the first main body (311) and the second main body (312) away from the second connecting part (321).

9. The butterfly gate opening mechanism of claim 8, wherein, The second fork frame (32) is provided with a third hinge part (323), the third hinge part (323) is located between the first main body (311) and the second main body (312) and the second connecting part (321), and the third hinge part (323) is hinged to the valve body cross beam (10).

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