Air valve control device

Abstract

The invention discloses an air valve control device which comprises a hollow valve body, an air baffle assembly, an air cylinder driving assembly, an air cylinder positioning assembly and a limiting seat fixed to the inner side of the valve body. The wind shield assembly comprises a rotating shaft, a first wind shield, a second wind shield and a tension spring. The rotating shaft is rotationally installed on the valve body, and one end of the rotating shaft penetrates out of the valve body and then is connected with the air cylinder driving assembly. The first wind shield is fixed on the rotating shaft and can synchronously rotate along with the rotating shaft; the two ends of the tension spring are arranged between the first wind shield and the second wind shield respectively, so that the first wind shield and the second wind shield form a complete wind shield structure; the second wind shield is provided with a limiting part and a positioning hole, the wind shield assembly has a closed state, a semi-open state and a completely-open state, and the air cylinder driving assembly has a first state and a second state. Compared with two states of a traditional structure, the three states of the invention can realize more detailed control.

Description

Technical Field

[0001] The invention relates to the field of air valves, and in particular to an air valve control device. Background Art

[0002] The air valve is used to control the airflow in the pipeline. For example, the patent document with publication number CN 116771930 A discloses a ventilation butterfly valve, which includes a valve body, a butterfly plate that can rotate and open or close the valve body after rotation is arranged in the valve body, and a butterfly plate operating mechanism for driving the butterfly plate to rotate is arranged on the valve body; the butterfly plate operating mechanism includes a valve stem shaft that is arranged on the valve body and can rotate along its own axis, the valve stem shaft is pivotally connected to the back of the butterfly plate, one end of the valve stem shaft is connected to the rocker arm outside the valve body, and the rocker arm is connected to the drive assembly; the valve stem shaft deviates from the center of the butterfly plate and the center of the valve body, and the drive assembly includes a tail seat fixed on the valve body and a standard cylinder, the cylinder body of the standard cylinder is hinged on the tail seat, and the piston end of the standard cylinder is hinged on the rocker arm.

[0003] The above scheme controls the rotation of the butterfly plate through the cylinder. The butterfly plate has only two states: closed and open. The butterfly plate has no intermediate state to achieve more detailed control. Summary of the invention

[0004] In view of the above problems, the present invention proposes a damper control device.

[0005] The technical solution adopted by the present invention is as follows: A damper control device comprises a hollow valve body, a damper assembly rotatably mounted on the valve body, and a cylinder drive assembly. The damper control device also comprises a cylinder positioning assembly and a limit seat fixed inside the valve body. The windshield assembly includes a rotating shaft, a first windshield, a second windshield, and a plurality of tension springs arranged at intervals: The rotating shaft is rotatably mounted on the valve body, one end of the rotating shaft passes through the valve body and is connected to the cylinder drive assembly, and the rotating shaft is driven by the cylinder drive assembly to rotate; The first windshield is fixed on the rotating shaft and can rotate synchronously with the rotating shaft. One end of the first windshield adjacent to the rotating shaft is a first connecting end. The second windshield has a second connecting end corresponding to the first connecting end. The two ends of the tension spring are respectively arranged at the first connecting end and the second connecting end. The tension spring is used to make the first connecting end and the second connecting end abut against each other, so that the first windshield and the second windshield form a complete windshield structure. The second windshield plate has a limiting portion and a positioning hole, the windshield assembly has a closed state, a semi-open state and a fully open state, and the cylinder drive assembly has a first state and a second state; When the windshield assembly is in the closed state, the cylinder drive assembly is in the first state, the limiting portion is embedded in the limiting seat, the first windshield and the second windshield form a complete windshield structure, and the windshield structure seals the valve body; When the windshield assembly is in a semi-open state, the cylinder drive assembly is in a second state, the limit portion is embedded in the limit seat and the cylinder positioning assembly extends into the positioning hole, the position of the second windshield is the same as the position of the second windshield when the windshield assembly is in a closed state, the first windshield rotates with the rotating shaft to a set angle, the tension spring is stretched and becomes longer, the first connecting end and the second connecting end are separated from each other, and the windshield assembly semi-opens the valve body; When the windshield assembly is in a fully open state, the cylinder drive assembly is in a second state, the cylinder positioning assembly is disengaged from the positioning hole, the first windshield and the second windshield form a complete windshield structure, the windshield structure rotates with the rotating shaft to a set angle, and the windshield assembly fully opens the valve body.

[0006] The first wind shield and the second wind shield of the present application can form a complete wind shield structure through a tension spring. By driving a rotating shaft fixed to the first wind shield, the wind shield assembly can have the same closed state and fully open state as the traditional structure. The second wind shield can be limited by the cooperation of the cylinder positioning assembly and the positioning hole of the second wind shield to prevent the second wind shield from moving along the axial direction of the valve body. The cooperation of the limiting portion of the second wind shield and the limiting seat can limit the second wind shield from moving in the radial direction of the valve body, so that the wind shield assembly of the present application has a semi-open state, that is, the air valve control device of the present application has three states of a closed state, a semi-open state and a fully open state. Compared with the two states of the traditional structure, more detailed control can be achieved.

[0007] In one embodiment of the present invention, the end surface of the first connecting end has a first mounting groove, the end surface of the second connecting end has a second mounting groove, one end of the tension spring is installed in the first mounting groove, and the other end is installed in the second mounting groove; One of the end faces of the first connection end and the end faces of the second connection end has a slot, and the other has a plug column. When the first wind shield and the second wind shield form a complete wind shield structure, the end face of the first connection end and the end face of the second connection end abut against each other, and the plug column is inserted into the slot.

[0008] The design of the first mounting groove and the second mounting groove can form a space for accommodating the tension spring, so that in the initial state (the first connecting end and the second connecting end abut against each other, and the first wind shield and the second wind shield form a complete wind shield structure) the tension spring is completely hidden in the two mounting grooves.

[0009] In actual use, each installation slot has a hanging rod, and the end of the tension spring is hooked on the corresponding hanging rod. In actual use, the plug column has a tapered portion. Furthermore, in order to limit the position of the tension spring and prevent the tension spring from moving along the length direction of the hanging rod, the hanging rod has an annular groove, and the end of the tension spring is hooked on the annular groove.

[0010] In one embodiment of the present invention, the limiting seat is provided with an anti-pull-out groove, and when the windshield assembly is in a closed state and a semi-open state, the limiting portion is embedded in the anti-pull-out groove.

[0011] The limiting part is embedded in the anti-pull-off groove so that when the windshield assembly is in a semi-open state (the tension spring is deformed and lengthened), the tension of the tension spring is overcome to prevent the second windshield from moving in the radial direction of the valve body. After the cylinder positioning assembly is separated from the positioning hole, the matching form of the limiting part and the anti-pull-off groove will not prevent the second windshield from rotating, that is, the semi-open state and the fully open state of the windshield assembly can be controlled by the cylinder positioning assembly.

[0012] In one embodiment of the present invention, the second connection end of the second wind shield plate is in contact with and matched with the rotating shaft.

[0013] This form of cooperation can ensure that the second windshield is subjected to force, so that the force on the windshield assembly is reliable and stable when switching between various states.

[0014] In one embodiment of the present invention, the portion of the second windshield plate away from the rotation axis has a positioning seat, and the positioning hole is arranged on the positioning seat; The cylinder positioning assembly comprises: A positioning cylinder is arranged on the outside of the valve body; A positioning rod is penetrated through the side wall of the valve body and is used for being inserted into the positioning hole of the positioning seat.

[0015] In one embodiment of the present invention, the end of the positioning rod is tapered.

[0016] The tapered design facilitates self-positioning, allowing the positioning rod to be reliably inserted into the positioning hole.

[0017] In one embodiment of the present invention, the air valve control device also includes a first limit strip and a second limit strip fixed on the inner side of the valve body. When the wind shield assembly is in a closed state, the periphery of the first wind shield is in sealing contact with the first limit strip, and the periphery of the second wind shield is in sealing contact with the second limit strip.

[0018] In the present application, the limiting seat and the second limiting strip may be the same component.

[0019] The sealing performance in the traditional structure is poor. In the present application, when the windshield assembly is in the closed state, the periphery of the first windshield is in sealing contact with the first limit strip, and the periphery of the second windshield is in sealing contact with the second limit strip. The present application has good sealing performance.

[0020] In one embodiment of the present invention, a crank is fixed to one end of the rotating shaft passing through the valve body, and the cylinder driving assembly includes: A mounting seat, fixed on the outer side wall of the valve body, the mounting seat having an arc-shaped groove, and the arc-shaped groove is arranged around the axis of the rotating shaft; A driving cylinder is mounted on the mounting seat, and a piston rod of the driving cylinder is perpendicular to the axis of the rotating shaft; A rotating member, a first end of which is rotatably mounted on the mounting seat, a rotation axis of the rotating member coincides with the axis of the rotating shaft, and an end of the crank away from the rotating shaft is connected to the rotating member via a fastener passing through the arc groove; A connecting piece, fixed on the piston rod of the driving cylinder; A linkage member, one end of which is rotatably mounted on the second end of the rotating member, and the other end of which is rotatably mounted on the connecting member.

[0021] In the traditional structure, the driving cylinder is directly connected to the crank through a linkage. The connecting lines of the hinge points of the driving cylinder and the linkage, and the hinge points of the linkage and the crank are likely to intersect with the axis of the rotating shaft (forming a dead point and a transmission angle of zero), causing the device to get stuck and unable to move.

[0022] The cylinder drive assembly of the present application can ensure that the transmission angle is always greater than zero and has no dead point by setting the arc groove and the connecting piece, thereby ensuring continuous movement.

[0023] In one embodiment of the present invention, the mounting seat is U-shaped, and the crank is located in a space formed by the mounting seat.

[0024] In one embodiment of the present invention, the axis of the rotating shaft is perpendicular to and intersects with the axis of the valve body.

[0025] The beneficial effects of the present invention are as follows: the first wind shield and the second wind shield of the present application can form a complete wind shield structure through a tension spring, and by driving a rotating shaft fixed to the first wind shield, the wind shield assembly can have the same closed state and fully open state as the traditional structure; the second wind shield can be limited by the cooperation of the cylinder positioning assembly and the positioning hole of the second wind shield to prevent the second wind shield from moving along the axial direction of the valve body, and the second wind shield can be limited to move in the radial direction of the valve body through the cooperation of the limiting portion of the second wind shield and the limiting seat, so that the wind shield assembly of the present application has a semi-open state, that is, the air valve control device of the present application has three states of a closed state, a semi-open state and a fully open state, which can achieve more detailed control compared with the two states of the traditional structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the air valve control device when the air deflector assembly is in a closed state; Figure 2 is a schematic diagram of the air valve control device from another angle when the air baffle assembly is in a closed state; Figure 3 yes Figure 2 The enlarged view of point A in the middle; Figure 4 is a schematic diagram of the air valve control device when the cylinder drive assembly is in the second state; Figure 5 is a schematic diagram of the air valve control device when the air deflector assembly is in a half-open state; Figure 6 yes Figure 5 The enlarged view of point B in the middle; Figure 7 is a schematic diagram of the damper control device when the damper assembly is in the fully open state.

[0027] The reference numerals in the figures are: 1. Valve body; 11. Limit seat; 111. Anti-pull-off groove; 12. First limit strip; 13. Second limit strip; 2. Wind shield assembly; 20. Wind shield structure; 21. Rotating shaft; 211. Crank; 22. First wind shield; 221. First connecting end; 2211. First mounting groove; 2212. Slot; 23. Second wind shield; 231. Second connecting end; 2311. Second mounting groove; 2312. Insert column; 232. Limit part; 233. Positioning seat; 2331. Positioning hole; 24. Tension spring; 3. Cylinder drive assembly; 31. Mounting seat; 311. Arc groove; 32. Drive cylinder; 321. Piston rod; 33. Rotating member; 34. Fastener; 35. Connecting member; 36. Linkage member; 4. Cylinder positioning assembly; 41. Positioning cylinder; 42. Positioning rod. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] The present invention is described in detail below in conjunction with the accompanying drawings.

[0032] like Figures 1 to 7 As shown, a damper control device includes a hollow valve body 1, a damper assembly 2 rotatably mounted on the valve body 1, and a cylinder drive assembly 3. The damper control device also includes a cylinder positioning assembly 4 (see Figure 1 and Figure 7 ) and the limit seat 11 fixed on the inner side of the valve body 1 (see Figure 7 ); like Figure 6 As shown, the windshield assembly 2 includes a rotating shaft 21, a first windshield 22, a second windshield 23, and a plurality of tension springs 24 arranged at intervals: like Figure 2 As shown, the rotating shaft 21 is rotatably mounted on the valve body 1, and one end of the rotating shaft 21 passes through the valve body 1 and is connected to the cylinder drive assembly 3. The rotating shaft 21 is driven by the cylinder drive assembly 3 to rotate; like Figure 5 and 6As shown, the first windshield 22 is fixed on the rotating shaft 21 and can rotate synchronously with the rotating shaft 21. One end of the first windshield 22 adjacent to the rotating shaft 21 is a first connecting end 221; the second windshield 23 has a second connecting end 231 corresponding to the first connecting end 221; the two ends of the tension spring 24 are respectively arranged at the first connecting end 221 and the second connecting end 231, and the tension spring 24 is used to make the first connecting end 221 and the second connecting end 231 abut against each other, so that the first windshield 22 and the second windshield 23 form a complete windshield structure 20; like Figure 7 As shown, the second wind shielding plate 23 has a limiting portion 232 and a positioning hole 2331 .

[0033] The windshield assembly 2 has a closed state, a semi-open state and a fully open state, and the cylinder drive assembly 3 has a first state and a second state; like Figure 1 , 2 As shown in FIG. 3 , when the windshield assembly 2 is in the closed state, the cylinder drive assembly 3 is in the first state, the limiting portion 232 is embedded in the limiting seat 11, and the first windshield 22 and the second windshield 23 form a complete windshield structure 20, and the windshield structure 20 seals the valve body 1; like Figure 4 , 5 As shown in Figure 6, when the windshield assembly 2 is in a semi-open state, the cylinder drive assembly 3 is in a second state, the limiting portion 232 is embedded in the limiting seat 11 and the cylinder positioning assembly 4 extends into the positioning hole 2331, the position of the second windshield 23 is the same as the position of the second windshield 23 when the windshield assembly 2 is in a closed state, the first windshield 22 rotates to a set angle with the rotating shaft 21, the tension spring 24 is stretched and lengthened, the first connecting end 221 and the second connecting end 231 are separated from each other, and the windshield assembly 2 semi-opens the valve body 1; like Figure 4 and 7 As shown, when the wind shield assembly 2 is in the fully open state, the cylinder drive assembly 3 is in the second state, the cylinder positioning assembly 4 is disengaged from the positioning hole 2331, the first wind shield 22 and the second wind shield 23 form a complete wind shield structure 20, the wind shield structure 20 rotates with the rotating shaft 21 to a set angle, and the wind shield assembly 2 fully opens the valve body 1.

[0034] The first wind shield 22 and the second wind shield 23 of the present application can form a complete wind shield structure 20 through the tension spring 24. By driving the rotating shaft 21 fixed to the first wind shield 22, the wind shield assembly 2 can have the same closed state and fully open state as the traditional structure; the second wind shield 23 can be limited by the cooperation between the cylinder positioning assembly 4 and the positioning hole 2331 of the second wind shield 23 to prevent the second wind shield 23 from moving along the axial direction of the valve body 1. The second wind shield 23 can be limited to move in the radial direction of the valve body 1 through the cooperation between the limiting portion 232 of the second wind shield 23 and the limiting seat 11, so that the wind shield assembly 2 of the present application has a semi-open state, that is, the air valve control device of the present application has three states of a closed state, a semi-open state and a fully open state. Compared with the two states of the traditional structure, more detailed control can be achieved.

[0035] like Figure 6 As shown, in this embodiment, the end surface of the first connecting end 221 has a first mounting groove 2211, the end surface of the second connecting end 231 has a second mounting groove 2311, one end of the tension spring 24 is installed in the first mounting groove 2211, and the other end is installed in the second mounting groove 2311; One of the end faces of the first connection end 221 and the second connection end 231 has a slot 2212, and the other has a plug post 2312. When the first wind shield 22 and the second wind shield 23 form a complete wind shield structure 20, the end face of the first connection end 221 and the end face of the second connection end 231 abut against each other, and the plug post 2312 is inserted into the slot 2212.

[0036] The design of the first mounting groove 2211 and the second mounting groove 2311 can form a space for accommodating the tension spring 24, so that in the initial state (the first connecting end 221 and the second connecting end 231 abut against each other, and the first wind shield 22 and the second wind shield 23 form a complete wind shield structure 20) the tension spring 24 is completely hidden in the two mounting grooves.

[0037] In actual use, each mounting slot has a hanging rod, and the end of the tension spring 24 is hooked on the corresponding hanging rod. In actual use, the plug post 2312 has a tapered portion. Furthermore, in order to limit the position of the tension spring 24 and prevent the tension spring 24 from moving along the length direction of the hanging rod, the hanging rod has an annular groove, and the end of the tension spring 24 is hooked on the annular groove.

[0038] like Figure 7 As shown, in this embodiment, the limiting seat 11 has an anti-pull-off groove 111, and when the windshield assembly 2 is in the closed state and the semi-open state, the limiting portion 232 is embedded in the anti-pull-off groove 111.

[0039] The limiting portion 232 is embedded in the anti-pull-off groove 111 so that when the wind deflector assembly 2 is in a semi-open state (the tension spring 24 is deformed and lengthened), the tension of the tension spring 24 is overcome to prevent the second wind deflector 23 from moving in the radial direction of the valve body 1. After the cylinder positioning assembly 4 is separated from the positioning hole 2331, the matching form of the limiting portion 232 and the anti-pull-off groove 111 will not prevent the second wind deflector 23 from rotating, that is, the semi-open state and the fully open state of the wind deflector assembly 2 can be controlled by the cylinder positioning assembly 4.

[0040] like Figure 6 As shown, in this embodiment, the second connecting end 231 of the second wind shielding plate 23 is in contact with and fits with the rotating shaft 21 .

[0041] This form of cooperation can ensure that the second wind deflector 23 is subjected to force, so that the force on the wind deflector assembly 2 is reliable and stable when switching between various states.

[0042] like Figure 3 and 7 As shown, in this embodiment, the portion of the second windshield plate 23 away from the rotating shaft 21 has a positioning seat 233, and the positioning hole 2331 is provided on the positioning seat 233. In actual use, the positioning seat 233 can be provided in plurality and arranged at intervals.

[0043] like Figure 1 and 3 As shown, the cylinder positioning assembly 4 includes: A positioning cylinder 41 is arranged outside the valve body 1; The positioning rod 42 is passed through the side wall of the valve body 1 and is used for being inserted into the positioning hole 2331 of the positioning seat 233 .

[0044] In this embodiment, the end of the positioning rod 42 is tapered. The tapered design facilitates self-positioning, so that the positioning rod 42 can be reliably inserted into the positioning hole 2331.

[0045] like Figure 1 and 7 As shown, in this embodiment, the air valve control device also includes a first limit strip 12 and a second limit strip 13 fixed on the inner side of the valve body 1. When the wind deflector assembly 2 is in a closed state, the periphery of the first wind deflector 22 is in sealing contact with the first limit strip 12, and the periphery of the second wind deflector 23 is in sealing contact with the second limit strip 13.

[0046] The sealing performance in the traditional structure is poor. In the present application, when the wind deflector assembly 2 is in the closed state, the periphery of the first wind deflector 22 is in sealing contact with the first limit strip 12, and the periphery of the second wind deflector 23 is in sealing contact with the second limit strip 13. The present application has good sealing performance.

[0047] In actual use, the limiting seat 11 and the second limiting strip 13 can be the same component.

[0048] like Figure 1 , 2 As shown in FIG. 4 , in this embodiment, a crank 211 is fixed to one end of the rotating shaft 21 passing through the valve body 1, and the cylinder drive assembly 3 includes: The mounting seat 31 is fixed on the outer wall of the valve body 1, and has an arc groove 311, which is arranged around the axis of the rotating shaft 21; A driving cylinder 32 is mounted on the mounting base 31, and a piston rod 321 of the driving cylinder 32 is perpendicular to the axis of the rotating shaft 21; A rotating member 33, a first end of the rotating member 33 is rotatably mounted on the mounting seat 31, a rotating shaft 21 line of the rotating member 33 coincides with the axis of the rotating shaft 21, and an end of the crank 211 away from the rotating shaft 21 is connected to the rotating member 33 via a fastener 34 passing through the arc groove 311; A connecting member 35 is fixed on the piston rod 321 of the driving cylinder 32; The linkage member 36 has one end rotatably mounted on the second end of the rotating member 33 , and the other end of the linkage member 36 is rotatably mounted on the connecting member 35 .

[0049] In the traditional structure, the driving cylinder 32 is directly connected to the crank 211 through the linkage 36. The connecting line of the hinge point between the driving cylinder 32 and the linkage 36 and the hinge point between the linkage 36 and the crank 211 easily intersects with the axis of the rotating shaft 21 (forming a dead point and a transmission angle of zero), and the device may get stuck and unable to move.

[0050] The cylinder drive assembly 3 of the present application can ensure that the transmission angle is always greater than zero and has no dead point by providing the arc groove 311 and the connecting member 35, thereby ensuring continuous movement.

[0051] like Figure 1 As shown, in this embodiment, the linkage member 36 is arc-shaped.

[0052] like Figure 1 As shown, in this embodiment, the mounting seat 31 is U-shaped, and the crank 211 is located in the space formed by the mounting seat 31 .

[0053] In this embodiment, the axis of the rotating shaft 21 is perpendicular to and intersects with the axis of the valve body 1 .

[0054] like Figure 5 , 6As shown in Figures 1 and 7, in this embodiment, the valve body 1 is circular, the first wind shield 22 and the second wind shield 23 are not semicircular, the first wind shield 22 and the second wind shield 23 both include straight side walls and circular side walls, the straight side wall of the first wind shield 22 is the first connecting end 221, and the straight side wall of the second wind shield 23 is the second connecting end 231, when the straight side walls of the two wind shields are pressed against each other under the action of the tension spring 24 to form the wind shield structure 20, the two semicircular wind shields form a circular wind shield.

[0055] like Figure 7 As shown, the limiting seat 11 and the positioning seat 233 are respectively arranged on the upper and lower sides of the second wind shielding plate 23.

[0056] like Figure 1 , 5 As shown in FIG. 7 , the upper end surface of the first wind shield plate 22 is used for sealing contact with the first limiting strip 12 , and the lower end surface of the second wind shield plate 23 is used for sealing contact with the second limiting strip 13 .

[0057] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention and the drawings, directly or indirectly used in other related technical fields, is also included in the protection scope of the present invention.

Claims

1. A damper control device, comprising a hollow valve body, a damper assembly rotatably mounted on the valve body, and a cylinder drive assembly, characterized in that: The air valve control device also includes a cylinder positioning assembly and a limit seat fixed inside the valve body; The windshield assembly includes a rotating shaft, a first windshield, a second windshield, and a plurality of tension springs arranged at intervals: The rotating shaft is rotatably mounted on the valve body, one end of the rotating shaft passes through the valve body and is connected to the cylinder drive assembly, and the rotating shaft is driven by the cylinder drive assembly to rotate; The first windshield is fixed on the rotating shaft and can rotate synchronously with the rotating shaft. One end of the first windshield adjacent to the rotating shaft is a first connecting end. The second windshield has a second connecting end corresponding to the first connecting end. The two ends of the tension spring are respectively arranged at the first connecting end and the second connecting end. The tension spring is used to make the first connecting end and the second connecting end abut against each other, so that the first windshield and the second windshield form a complete windshield structure. The second windshield plate has a limiting portion and a positioning hole, the windshield assembly has a closed state, a semi-open state and a fully open state, and the cylinder drive assembly has a first state and a second state; When the windshield assembly is in the closed state, the cylinder drive assembly is in the first state, the limiting portion is embedded in the limiting seat, the first windshield and the second windshield form a complete windshield structure, and the windshield structure seals the valve body; When the windshield assembly is in a semi-open state, the cylinder drive assembly is in a second state, the limit portion is embedded in the limit seat and the cylinder positioning assembly extends into the positioning hole, the position of the second windshield is the same as the position of the second windshield when the windshield assembly is in a closed state, the first windshield rotates with the rotating shaft to a set angle, the tension spring is stretched and becomes longer, the first connecting end and the second connecting end are separated from each other, and the windshield assembly semi-opens the valve body; When the windshield assembly is in a fully open state, the cylinder drive assembly is in a second state, the cylinder positioning assembly is disengaged from the positioning hole, the first windshield and the second windshield form a complete windshield structure, the windshield structure rotates with the rotating shaft to a set angle, and the windshield assembly fully opens the valve body.

2. The air valve control device according to claim 1, characterized in that: The end surface of the first connecting end has a first mounting groove, the end surface of the second connecting end has a second mounting groove, one end of the tension spring is installed in the first mounting groove, and the other end is installed in the second mounting groove; One of the end faces of the first connection end and the end faces of the second connection end has a slot, and the other has a plug column. When the first wind shield and the second wind shield form a complete wind shield structure, the end face of the first connection end and the end face of the second connection end abut against each other, and the plug column is inserted into the slot.

3. The air valve control device according to claim 2, characterized in that: The limiting seat is provided with an anti-pull-out groove, and when the windshield assembly is in a closed state and a semi-open state, the limiting portion is embedded in the anti-pull-out groove.

4. The air valve control device according to claim 1, characterized in that: The second connecting end of the second wind shield plate is in contact with and fits with the rotating shaft.

5. The air valve control device according to claim 1, characterized in that: The portion of the second windshield plate away from the rotating shaft has a positioning seat, and the positioning hole is arranged on the positioning seat; The cylinder positioning assembly comprises: A positioning cylinder is arranged on the outside of the valve body; A positioning rod is penetrated through the side wall of the valve body and is used for being inserted into the positioning hole of the positioning seat.

6. The air valve control device according to claim 5, characterized in that: The end of the positioning rod is tapered.

7. The air valve control device according to claim 5, characterized in that: The air valve control device also includes a first limit strip and a second limit strip fixed on the inner side of the valve body. When the wind shield assembly is in a closed state, the periphery of the first wind shield is in sealing contact with the first limit strip, and the periphery of the second wind shield is in sealing contact with the second limit strip.

8. The air valve control device according to claim 1, characterized in that: A crank is fixed to one end of the rotating shaft passing through the valve body, and the cylinder drive assembly comprises: A mounting seat, fixed on the outer side wall of the valve body, the mounting seat having an arc-shaped groove, and the arc-shaped groove is arranged around the axis of the rotating shaft; A driving cylinder is mounted on the mounting seat, and a piston rod of the driving cylinder is perpendicular to the axis of the rotating shaft; A rotating member, a first end of which is rotatably mounted on the mounting seat, a rotation axis of the rotating member coincides with the axis of the rotating shaft, and an end of the crank away from the rotating shaft is connected to the rotating member via a fastener passing through the arc groove; A connecting piece, fixed on the piston rod of the driving cylinder; A linkage member, one end of which is rotatably mounted on the second end of the rotating member, and the other end of which is rotatably mounted on the connecting member.

9. The air valve control device according to claim 8, characterized in that: The mounting seat is U-shaped, and the crank is located in a space formed by the mounting seat.

10. The air valve control device according to claim 1, characterized in that: The axis of the rotating shaft is perpendicular to and intersects with the axis of the valve body.

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