WO2023000669A1

WO2023000669A1 - Driving assembly for ventilation valve blades

Info

Publication number: WO2023000669A1
Application number: PCT/CN2022/077666
Authority: WO
Inventors: 卢丙利; 阮红正
Original assignee: 倚世节能科技（上海）有限公司
Priority date: 2021-07-21
Filing date: 2022-02-24
Publication date: 2023-01-26
Also published as: CN215635036U

Abstract

A driving assembly for ventilation valve blades (20). A plurality of ventilation valve blades (20) are provided in an inner cavity (11) of a ventilation valve (1), the plurality of ventilation valve blades (20) are arranged circumferentially around a central line (O) of the inner cavity (11), and the central line (O) extends in a first direction (Z). The driving assembly comprises a driving device (40) and a transmission mechanism (30). The transmission mechanism (30) comprises: a first-stage transmission part, wherein the first-stage transmission part is annular, is used for being sleeved on an outer surface of the ventilation valve (1), and is connected to the driving device (40); and a plurality of second-stage transmission parts corresponding to the plurality of ventilation valve blades (20) on a one-to-one basis, wherein each second-stage transmission part is connected to a rotating shaft of the corresponding ventilation valve blade (20) and is connected to the first-stage transmission part, and the rotating shaft of each ventilation valve blade (20) is perpendicular to the central line (O). The driving device (40) is used for driving the first-stage transmission part to rotate forward or backward in a circumferential direction to synchronously drive each second-stage transmission part, such that each second-stage transmission part drives the corresponding ventilation valve blade (20) to rotate forward or backward around its own rotating shaft. By means of an external transmission structure, the problem of asynchronous rotation of the plurality of ventilation valve blades (20) can be solved.

Description

A drive assembly for ventilation valve blades

technical field

The utility model relates to the technical field of ventilation, in particular to a driving assembly of a ventilation valve blade.

Background technique

Ventilation valve is a regulating valve with simple structure and wide application. It can be used in ventilation and environmental protection projects in various industries such as chemical industry, building materials, power stations, etc., as a control device for regulating or cutting off the flow of gas medium.

Existing ventilation valves generally include a valve body and a plurality of blades arranged in the valve body. Usually, a gear transmission mechanism is arranged at the center of the valve body, and the driving device of the valve body drives the blades to rotate by driving the gear transmission mechanism. In the process of driving the blades to rotate in the existing gear transmission structure inside the valve body, the blades have the problem of asynchrony, so the sealing performance is not good, and there is also the problem of howling.

Contents of the invention

The purpose of the utility model is to solve the technical problem that the blades rotate out of synchronization. The utility model provides a driving assembly of ventilation valve blades. The external transmission structure solves the problem of asynchronous rotation of multiple blades and can reduce air leakage.

In order to solve the above-mentioned technical problems, the embodiment of the utility model discloses a driving assembly of the ventilation valve blade. The inner cavity of the ventilation valve is provided with a plurality of damper blades. The circumferential setting of the center line, the center line extends along the first direction, the drive assembly includes: a drive device; a transmission mechanism, the transmission mechanism includes: a primary transmission part, connected to the drive device, the one The first-stage transmission part is ring-shaped and is used to be sleeved on the outer surface of the ventilation valve; there are multiple two-stage transmission parts corresponding to a plurality of air valve blades one by one, and each of the two-stage transmission parts is connected to the corresponding airflow valve. The rotating shaft of the valve blade is connected with the first-stage transmission part, and the rotating shaft of each air valve blade is perpendicular to the center line; the driving device is used to drive the first-stage transmission part to move forward along the circumferential direction Or rotate in reverse to synchronously drive each of the two-stage transmission parts, so that each of the two-stage transmission parts drives the corresponding air valve blades to rotate forward or reverse around their respective rotating shafts; During the forward rotation of the first-stage transmission part along the circumferential direction, the ventilation valve is switched from the closed state to the open state; during the reverse rotation of the primary transmission part along the circumferential direction, the ventilation valve is switched by the The said open state is switched to the said closed state.

The above technical solution is adopted, and the driving device is taken as an example of a motor for illustration. The output shaft of the motor is connected with the primary transmission part, and the output shaft of the motor transmits the torque to the primary transmission part, and the output shaft of the motor and the primary transmission part are always synchronized; the primary transmission part uniformly transmits the torque to the secondary transmission part, and then transmitted to each air valve blade by the secondary transmission part, so that each air valve blade is always synchronized when rotating to ensure that the air valve blades are closed. The external transmission structure solves the problem of asynchronous rotation of multiple air valve blades, which can reduce air leakage and solve the problem of howling.

According to another specific embodiment of the present utility model, the transmission mechanism drives each of the damper blades to synchronously rotate the same angle around their respective rotating shafts, so that the ventilation valve is switched between the closed state and the open state.

According to another specific embodiment of the present utility model, the first-stage transmission part is a transmission ring, the second-stage transmission part is a blade driving rod, one end of the blade driving rod is rotationally connected with the transmission ring, and the other end is connected with the The rotating shafts of the air valve blades are fixedly connected, and the other end of each blade driving rod can swing with the connection point between the rotating shaft and the blade driving rod as a fulcrum.

According to another specific embodiment of the present utility model, the outer peripheral surface of the transmission ring is provided with a plurality of first bumps corresponding to the plurality of blade driving rods one by one, and the one end of the blade driving rod is provided with A first through hole extending along the extension direction of the vane lever, the first protrusion corresponding to the vane lever is engaged in the first through hole, and can be moved along the first through hole The walls of the hole move.

According to another specific embodiment of the present invention, the first-stage transmission part is a transmission ring, the second-stage transmission part includes a connecting rod and a rocker, one end of the connecting rod is rotatably connected to the transmission ring, and the other end is connected to the transmission ring. One end of the rocker is rotatably connected, and the other end of the rocker is fixedly connected with the rotating shaft of the damper blade.

According to another specific embodiment of the present invention, it further includes: a driving lever, one end of which is rotatably connected to the transmission ring, and the other end is fixedly connected to the driving device; the driving device is used to drive the The driving lever swings forward or reverse to drive the transmission ring to rotate forward or reverse along the circumferential direction.

According to another specific embodiment of the present utility model, the outer peripheral surface of the transmission ring is provided with a second protrusion corresponding to the driving lever, and the one end of the driving lever is provided with a The second through hole extending in the extending direction of the second through hole, the second protrusion is clamped in the second through hole, and can move along the hole wall of the second through hole.

According to another specific embodiment of the present invention, the first-stage transmission part is a gear plate, and one end of the gear plate in the first direction is provided with teeth distributed along the circumferential direction, and the circumferential direction surrounds the first One direction: the secondary transmission part is a vane gear, which is fixedly connected to the rotating shaft of the air valve vane and meshes with the teeth of the gear plate.

According to another specific embodiment of the present utility model, it further includes: a driving gear fixedly connected to the driving device and meshed with the teeth of the gear plate, the driving device is used to drive the driving gear forward or Reverse rotation to drive the gear plate to rotate forward or reverse along the circumferential direction.

According to another specific embodiment of the present utility model, the driving device is a motor.

According to another specific embodiment of the present utility model, the damper blades are fan-shaped.

Description of drawings

Fig. 1 shows the perspective view one of the ventilation valve of the utility model embodiment;

Fig. 2 shows the second perspective view of the ventilation valve of the utility model embodiment;

Fig. 3 shows the first perspective view of the vane in the ventilation valve of the utility model embodiment;

Fig. 4 shows the second perspective view of the vane in the ventilation valve of the utility model embodiment;

Fig. 5 shows a three-dimensional view of the ventilation valve of the utility model embodiment;

Fig. 6 shows a perspective view four of the ventilation valve of the utility model embodiment;

Fig. 7 shows a perspective view five of the ventilation valve of the utility model embodiment;

Fig. 8 shows a perspective view six of the ventilation valve of the utility model embodiment;

Fig. 9 shows a perspective view VII of the ventilation valve of the utility model embodiment;

Fig. 10 shows a perspective view eight of the ventilation valve of the utility model embodiment;

Fig. 11 shows a perspective view nine of the ventilation valve of the utility model embodiment;

Fig. 12 shows a perspective view ten of the ventilation valve of the utility model embodiment;

Figure 13 shows a three-dimensional view eleven of the utility model embodiment ventilation valve;

Fig. 14 shows the first perspective view of the impeller-type air volume meter in the ventilation valve of the embodiment of the utility model;

Fig. 15 shows the second perspective view of the impeller-type air volume meter in the ventilation valve of the embodiment of the utility model;

Figure 16 shows a three-dimensional view of the impeller-type air volume meter in the ventilation valve of the embodiment of the utility model;

Figure 17 shows a perspective view four of the impeller-type air volume meter in the ventilation valve of the embodiment of the utility model;

Fig. 18 shows the first top view of the impeller-type air volume meter in the ventilation valve of the embodiment of the utility model;

Figure 19 shows a side view of the impeller-type air volume meter in the ventilation valve of the embodiment of the utility model;

Fig. 20 shows a three-dimensional exploded view of the impeller-type air volume meter in the ventilation valve of the embodiment of the present utility model;

Figure 21 shows the second top view of the impeller-type air volume meter in the ventilation valve of the embodiment of the utility model;

Fig. 22 is a sectional view of part A-A in Fig. 21 .

detailed description

The implementation of the present utility model is illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Although the description of the utility model will be introduced together with the preferred embodiment, it does not mean that the features of the utility model are limited to the embodiment. On the contrary, the purpose of introducing the utility model in conjunction with the embodiments is to cover other options or modifications that may be extended based on the claims of the utility model. The following description contains numerous specific details in order to provide an in-depth understanding of the present invention. The invention can also be implemented without these details. In addition, in order to avoid confusion or obscure the key points of the present invention, some specific details will be omitted in the description. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

It should be noted that in this specification, similar numerals and letters denote similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be identified in subsequent drawings. for further definition and explanation.

In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom" etc. is based on the orientation or positional relationship shown in the drawings, or is The usual orientation or positional relationship of the utility model product in use is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operation, and therefore cannot be construed as a limitation of the utility model.

The terms "first", "second", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In order to make the purpose, technical solutions and advantages of the utility model clearer, the implementation of the utility model will be further described in detail below in conjunction with the accompanying drawings.

Referring to FIGS. 1 to 8 , the present application provides a ventilation valve 1 , including: a valve body 10 , a plurality of damper blades 20 , a transmission mechanism 30 and a driving device 40 .

Wherein, the valve body 10 has an inner cavity 11 extending along a first direction (shown in the Z direction in FIG. An opening at one end of the valve body 10), and the inner cavity 11 has a centerline extending along the first direction (shown by O in FIG. 1 ). Exemplarily, the valve body 10 is cylindrical. The above-mentioned plurality of air valve blades 20 are arranged along the circumferential direction around the center line (shown by T in FIG. 1 ) and are located in the inner cavity 11. Each air valve blade 20 has a rotating shaft 21, and the rotating shaft 21 of each air valve blade 20 is vertical. on the centerline. Exemplarily, the damper blade 20 is fan-shaped.

In the present application, the transmission mechanism 30 is arranged outside the inner chamber 11 of the valve body 10 , and each damper blade 20 is connected with the transmission mechanism 30 . The driving device 40 is located outside the inner cavity 11 of the valve body 10 and is connected with the transmission mechanism 30. The driving device 40 is used to drive the transmission mechanism 30, so that the transmission mechanism 30 drives each damper blade 20 to rotate synchronously around the respective rotating shaft 21 ( In Fig. 3, the direction P is the rotation direction), so that the ventilation valve 1 can be switched between the closed state and the open state.

Exemplarily, the driving device 40 is a motor (such as a stepping motor), and is mounted on the outer surface of the valve body 10 through a mounting portion 41 (such as a mounting plate). 1 to 4, the valve body 10 is in the closed state (the opening of the ventilation valve 1 is 0°), and the side ends 22 of adjacent air valve blades 20 are attached to each other, which has a certain sealing performance. The side end 22 of the damper vane 20 extends in a radial direction (shown as M in FIGS. 1 to 4 ), and the radial direction is perpendicular to the first direction.

Referring to FIG. 5 to FIG. 8 , the valve body 10 is in an open state, and the side ends 22 of adjacent damper blades 20 are separated. Exemplarily, the transmission mechanism 30 drives each damper vane 20 to rotate synchronously and positively around its respective rotating shaft 21 , and the ventilation valve 1 switches from a closed state to an open state. The transmission mechanism 30 drives each air valve vane 20 to rotate synchronously and reversely around its respective rotating shaft 21, and the ventilation valve 1 is switched from an open state to a closed state.

The opening degree of the ventilation valve 1 in the open state can be controlled by the driving device 40 to drive the rotation angle of each damper vane 20 around the respective rotating shaft 21 . Exemplarily, FIG. 5 and FIG. 6 show that the opening of the ventilation valve 1 is 45°, and the included angle between each damper blade 20 and the horizontal direction may be 45°. Fig. 7 and Fig. 8 show that the opening degree of the ventilation valve 1 is 90°, and the included angle between each damper blade 20 and the horizontal direction may be 90°. The application does not limit the opening of the ventilation valve 1 in the open state, and it is controlled according to the actual ventilation demand, for example, the opening of the ventilation valve 1 is 30°, 60°, 75°, etc.

In this application, the transmission structure of the valve body 10 is moved outward (set outside the inner cavity 11 of the valve body 10), the transmission mechanism 30 is not arranged at the center of the inner cavity 11 of the valve body 10, and the transmission mechanism 30 no longer occupies The space at the center of the valve body 10 of the ventilation valve 1 can effectively increase the flow area of the ventilation valve 1 . Especially for the small-diameter ventilation valve 1 , reducing the space occupied by the transmission mechanism 30 at the center of the valve body 10 can further increase the flow area of the ventilation valve 1 .

Exemplarily, a support portion is provided at the center of the inner chamber 11 of the valve body 10, and the center line passes through the support portion. One end of the rotating shaft 21 of each damper blade 20 is rotatably supported on the support portion, and the other end is connected to the support portion. The transmission mechanism 30 is fixedly connected. In some possible implementations, referring to FIG. 2 and FIG. 3 , the support portion includes an upper cup 12 and a lower cup 13 that are butted in the first direction, and the upper cup 12 and the lower cup 13 are butted to form intervals along the circumferential direction. A plurality of rotating shaft support holes 131 are provided, and one end of the rotating shaft 21 is supported in the rotating shaft supporting holes 131 . Wherein, the upper bowl cover 12 and the lower bowl cover 13 have cavities respectively, and have a plurality of half rotating shaft support holes 131 distributed along the circumferential interval on the outer edge, when the upper bowl cover 12 and the lower bowl cover 13 are butted along the first direction Finally, the upper bowl cover 12 and the lower bowl cover 13 form a complete rotating shaft supporting hole 131 , so that one end of the rotating shaft 21 can be supported in the rotating shaft supporting hole 131 .

That is, the space at the central position of the valve body 10 of the present application is occupied by the support portion. After the transmission mechanism 30 is moved outward, the space occupied by the support portion at the center can be reduced, for example, the space at the center of the valve body 10 is reduced to Φ29 mm to Φ32 mm.

The present application does not limit the number of damper blades 20 , nine damper blades 20 are shown in FIG. 1 to FIG. 8 , and a corresponding number of damper blades 20 can be used in other embodiments according to usage requirements. Exemplarily, the above-mentioned rotating shaft 21 is provided at the middle of the above-mentioned damper blade 20 . In this application, the damper blade 20 and the rotating shaft 21 adopt an integrated structure. That is, during the production process, the air valve blade 20 and the rotating shaft 21 are integrally formed, which effectively improves the strength of the air valve blade 20 . Exemplarily, the thickness of the damper blade 20 is 3 mm to 5 mm. Exemplarily, the above-mentioned damper blade 20 is made of non-metallic materials, such as polyethylene material (PE), polyvinyl chloride material (PVC), polypropylene material (PP), etc., but the present application is not limited thereto. Other various materials can also be used as the material of the damper blade 20 .

In some possible implementations, the transmission mechanism 30 drives each damper vane 20 to rotate forward or backward at the same angle synchronously around its respective rotating shaft 21, so that the ventilation valve 1 is switched between the closed state and the open state. Such setting facilitates the synchronous rotation of all damper vanes 20 after a plurality of damper vanes 20 are arranged in the valve body 10, so that the ventilation valve 1 is switched between the closed state and the open state.

Continuing to refer to Fig. 1 to Fig. 8, the transmission mechanism 30 of the present application comprises: a primary transmission part, the primary transmission part is annular (such as the transmission ring 31 and the gear plate 31a described later), and the primary transmission part is sleeved on The outer surface of the valve body 10 is connected with the driving device 40; a plurality of two-stage transmission parts corresponding to a plurality of air valve blades 20 (the blade driving rod 31 and the connecting rod 34, the rocking rod 35 and the blade gear 36 described later ), each secondary transmission part is connected with the rotating shaft 21 of the corresponding damper blade 20, and is connected with the primary transmission part.

Therefore, the driving device 40 drives the first-stage transmission part to rotate forward (shown in the direction of A in FIG. 2 ) or reversely (shown in the direction of B in FIG. 2 ) along the circumferential direction to synchronously drive each of the two-stage transmission parts, and then make each two-stage transmission part The stage transmission part drives the corresponding damper blades 20 to rotate forward or reverse around their respective rotating shafts 21 . During the positive rotation of the first-stage transmission part in the circumferential direction (shown in the direction of A in Figure 2), the ventilation valve 1 is switched from the closed state to the open state; during the reverse rotation of the first-stage transmission part in the circumferential direction (shown in the direction of B in Figure 2 During the process shown), the ventilation valve 1 is switched from the open state to the closed state.

The drive device 40 is used as an example for illustration. The output shaft 42 of the motor is connected with the primary transmission part, and the output shaft 42 of the motor transmits the torque to the primary transmission part, and the output shaft 42 of the motor is always synchronized with the primary transmission part; the primary transmission part uniformly transmits the force distance to The secondary transmission part is then transmitted to each air valve blade 20 by the secondary transmission part, so that each air valve blade 20 is always synchronized when rotating, ensuring that the air valve blades 20 are closed. The external transmission structure solves the problem of asynchronous rotation of the multi-air valve blades 20, which can reduce the amount of air leakage and solve the problem of howling.

In some possible implementations, referring to FIG. 1 to FIG. 8 , the above-mentioned primary transmission part is a transmission ring 31 , for example, the transmission ring 31 is a steel transmission ring 31 . The secondary transmission part is a blade driving rod 32 , one end of the blade driving rod 32 is rotationally connected with the transmission ring 31 , and the other end is fixedly connected with the rotating shaft 21 of the damper blade 20 . Exemplarily, along the first direction, the primary transmission part may be located above the secondary transmission part (as shown in FIG. 2 ); or, the primary transmission part may be located below the secondary transmission part (as shown in FIG. 1 ).

The motor drives the transmission ring 31 to rotate positively in the circumferential direction, and the transmission ring 31 transmits the torque to each blade driving rod 32, so that each blade driving rod 32 will take the connection point between the rotating shaft 21 and the blade driving rod 32 as the fulcrum (the dotted line in Fig. 2 The intersection point N) of C and dotted line D swings from the position shown by C in FIG. 2 to the position shown by D in FIGS. The rotating shaft 21 of the valve vane 20 rotates in the forward direction, and then each damper blade 20 rotates in the forward direction around its respective rotating shaft 21 , and the ventilation valve 1 switches from the closed state to the open state.

Alternatively, the motor drives the transmission ring 31 to rotate in the opposite direction in the circumferential direction, and the transmission ring 31 transmits the torque to each blade driving rod 32, so that the other end of each blade driving rod 32 will be connected to the connection point between the rotating shaft 21 and the blade driving rod 32 Swing as a fulcrum, from the position shown in D in Fig. 2 to Fig. 8 to the position shown in C in Fig. 2 , thus, when each blade lever 32 swings, it will drive the rotating shaft 21 of the corresponding damper blade 20 to reverse Then each air valve vane 20 will rotate in the opposite direction around its respective rotating shaft 21, and the ventilation valve 1 will switch from an open state to a closed state.

During the swinging process of the vane driving lever 32, the transmission ring 31, the vane driving lever 32 and the motor are always synchronized, thereby ensuring that all the damper vanes 20 are synchronously rotating in the forward or reverse direction.

In this application, there is no limitation on the rotational connection between the vane lever 32 and the transmission ring 31. In some possible implementations, the outer peripheral surface of the transmission ring 31 is provided with a plurality of first protrusions corresponding to the plurality of vane levers 32 one-to-one. Block 311, one end of the vane lever 32 is provided with a first through hole 321 extending along the extension direction of the vane lever 32, and the first protrusion 311 corresponding to the vane lever 32 is snapped into the first through hole 321 , and can move along the hole wall of the first through hole 321 . When the motor drives the transmission ring 31 to rotate forward or reverse in the circumferential direction, since the first protrusion 311 on the transmission ring 31 engages with the first through hole 321, the transmission ring 31 can synchronously transmit the torque to each blade lever 32. When the transmission ring 31 continues to rotate in the circumferential direction, the first protrusion 311 will move along the wall of the first through hole 321 to drive each vane lever 32 to swing synchronously, and then drive each damper vane 20 Synchronized forward or reverse rotation. This improves the synchronicity of the drive.

Exemplarily, FIG. 2 shows that the ventilation valve 1 is in a closed state, and the first protrusion 311 on the transmission ring 31 is located at the upper left corner of the first through hole 321 . FIG. 6 shows that the ventilation valve 1 is in an opening state of 45°, and the first protrusion 311 on the transmission ring 31 is located at the bottom of the first through hole 321 . Figure 8 shows that the ventilation valve 1 is in a 90° opening state, the first bump 311 on the transmission ring 31 is located at the upper left corner of the first through hole 321, and Figure 8 shows that the vane lever 32 swings to the right to the limit position, the figure 2 shows that the damper vane 20 swings to the left to the extreme position.

The present application does not limit the connection method between the driving device 40 and the transmission ring 31 , and the methods that can drive the transmission ring 31 to rotate forward or reverse all belong to the protection scope of the present application. Exemplarily, referring to FIG. 2 and FIG. 5 , the transmission mechanism 30 of the present application further includes: a driving lever 33 , for example, the structure of the driving lever 33 is the same as that of the vane lever 32 . One end of the driving lever 33 of the present application is rotatably connected to the transmission ring 31 , and the other end is fixedly connected to the driving device 40 . The driving device 40 is used to drive the driving lever 33 to swing forward or reverse, so as to drive the transmission ring 31 to rotate forward or reverse along the circumferential direction. For example, the output shaft 42 of the motor rotates forward or reversely, and the output shaft 42 of the motor drives the driving lever 33 to swing forward or reversely, so that the drive transmission ring 31 is driven forward or reversely along the circumferential direction during the swing process of the driving lever 33. to turn.

Because the output shaft 42 of the motor is fixedly connected with the driving lever 33, the driving lever 33 is always synchronized with the output shaft 42 of the motor, thus, in the process of the forward or reverse swing of the driving lever 33, the transmission ring 31, the blade lever 32. The drive lever 33 and the output shaft 42 of the motor are always synchronous, thereby ensuring that all air valve blades 20 are synchronously rotating forward or reverse.

This application does not limit the rotational connection between the driving lever 33 and the transmission ring 31. In some possible implementations, the outer peripheral surface of the transmission ring 31 is provided with a second protrusion 312 corresponding to the driving lever 33, and the driving lever 31 One end of the rod 33 is provided with a second through hole 331 extending along the extension direction of the driving lever 33, and the second protrusion 312 is snapped into the second through hole 331, and can be moved along the second through hole 331. The hole walls move. When the output shaft 42 of the motor drives the driving lever 33 to swing forward or reversely, since the second protrusion 312 on the transmission ring 31 is engaged with the second through hole 331, the driving lever 33 can synchronously transmit the torque to When the transmission ring 31 and the driving lever 33 continue to swing forward or reverse, the second protrusion 312 will move along the hole wall of the second through hole 331 to drive the transmission ring 31 synchronously forward or reverse along the circumferential direction. To rotate, and then drive each damper blade 20 to rotate forward or reverse synchronously. This improves the synchronicity of the drive.

It should be noted that the primary transmission part and the secondary transmission part are not limited to the structures described in the above embodiments. In some possible implementations, referring to Fig. 9 and Fig. 10, the primary transmission part is a transmission ring 31, the secondary transmission part includes a connecting rod 34 and a rocker 35, one end of the connecting rod 34 is rotationally connected with the transmission ring 31, and the other end One end of the rocker 35 is rotationally connected, and the other end of the rocker 35 is fixedly connected with the rotating shaft 21 of the damper blade 20 .

The difference from the above embodiments is that the structure of the secondary transmission part is different. Correspondingly, when the motor drives the transmission ring 31 to rotate forward or reverse in the circumferential direction, the transmission ring 31 transmits the torque to each connecting rod 34, and each connecting rod 34 transmits the torque to the corresponding rocker 35, and the rocker 35 will swing positively or reversely with the connection point of the rotating shaft 21 and the rocking bar 35 as the fulcrum, so that each rocking bar 35 will drive the rotating shaft 21 of the corresponding damper blade 20 to rotate forwardly or reversely when swinging, and then Each damper vane 20 rotates forwardly or reversely around its respective rotating shaft 21 , and the ventilation valve 1 is switched from a closed state to an open state.

Wherein, in this embodiment, the connection method between the driving device 40 and the transmission ring 31 is not limited, and the connection method shown in FIGS. In some possible implementations, the drive motor can be connected to the transmission ring 31 by means of the aforementioned rocker 35 and connecting rod 34 . For example, one end of the connecting rod 34 is rotatably connected to the transmission ring 31 , and the other end is rotatably connected to one end of the rocker 35 , and the other end of the rocker 35 is fixedly connected to the output shaft 42 of the motor.

In some possible implementations, referring to Fig. 11 and Fig. 12, the primary transmission part is a gear plate 31a, and one end of the gear plate 31a in the first direction is provided with teeth 311 distributed along the circumferential direction; the secondary transmission part is a vane gear 36. The vane gear 36 is fixedly connected to the rotating shaft 21 of the damper vane 20, and meshes with the teeth 311 of the gear plate 31a. In the present application, the vane gear 36 is located below the gear plate 31a, and the lower end of the gear plate 31a in the first direction is provided with teeth 311 distributed along the circumferential direction. In some possible implementations, the vane gear 36 is located above the gear plate 31a, and the upper end of the gear plate 31a in the first direction is provided with teeth 311 distributed along the circumferential direction.

The difference from the above embodiments is that the structures of the primary transmission part and the secondary transmission part are different. Correspondingly, when the motor drives the gear plate 31a to rotate forward or reverse in the circumferential direction, the gear plate 31a meshes with each vane gear 36, thereby transmitting torque to each vane gear 36, and each vane gear 36 will rotate forward Or reverse rotation, thus, when each vane gear 36 rotates forward or reverse, it will drive the rotating shaft 21 of the corresponding air valve blade 20 to rotate forward or reversely, and then each air valve blade 20 will rotate around the respective rotating shaft 21 Forward or reverse rotation, ventilation valve 1 is switched from closed to open.

Continuing to refer to Fig. 11 and Fig. 12, the transmission mechanism 30 also includes: a driving gear 37, the driving gear 37 is fixedly connected with the driving device 40, and meshes with the teeth 311 of the gear plate 31a, and the driving device 40 is used to drive the driving gear 37 forward Or reverse rotation to drive the gear plate 31a to rotate forward or reverse along the circumferential direction. For example, the output shaft 42 of the motor is connected to the driving gear 37, and the driving gear 37 and the above-mentioned plurality of vane gears 36 are located in the same circumferential direction. Therefore, when the output shaft 42 of the motor rotates forward or reverse, it will drive the drive gear 37 to rotate forward or reverse, and then drive the gear plate 31a to rotate forward or reverse along the circumferential direction. This form makes full use of the teeth 311 on the gear plate 31a, and realizes the circumferential driving of the motor to the gear plate 31a through the transmission structure of the teeth 311, so that the ventilation valve 1 has a compact structure.

It should be noted that the above-mentioned one-stage transmission part and two-stage transmission part are examples, and the manners in which the transmission mechanism 30 moves outward and can drive the damper vanes 20 to rotate all fall within the scope of protection of the present application.

Continuing to refer to FIG. 2 to FIG. 4 , the ventilation valve 1 is in the closed state, and along the first direction, each damper vane 20 includes a front surface 23 and a reverse surface 24 . Exemplarily, when the ventilation valve 1 is in the closed state, the front side 23 and the back side 24 of each damper vane 20 are perpendicular to the central line O of the valve body 10 . When the ventilation valve 1 is at an opening of 45° (the state shown in FIGS. 5 and 6 ), the angle between the front side 23 and the back side 24 of each damper blade 20 and the horizontal direction is 45°. When the ventilation valve 1 is at an opening of 90° (the state shown in FIGS. 7 and 8 ), the angle between the front side 23 and the back side 24 of each damper blade 20 and the horizontal direction is 90°.

As mentioned above, the air valve blade 20 of the present application is fan-shaped, and the fan-shaped air valve blade 20 includes an arc segment and a radially extending radius segment connected to the two ends of the arc segment (as described in the foregoing embodiments). The side end 22 of the damper blade 20 is described). That is, the fan-shaped air valve blade 20 includes side ends 22 positioned on both sides of the arc section, and the front side 23 of the side end 22 on one side of the air valve blade 20 of the present application is provided with a first V-shaped structure 231, and the air valve blade 20 The opposite side 24 of the side end 22 on the other side is provided with a second V-shaped structure 241 .

When the ventilation valve 1 is in the closed state, the first V-shaped structure 231 and the second V-shaped structure 241 of the adjacent air valve blades 20 are attached to each other, and the outer edge of the first V-shaped structure 231 is located at the second V-shaped structure 241. Inside, the outer edge of the second V-shaped structure 241 is located inside the first V-shaped structure 231 . That is to say, the side ends 22 of the adjacent damper blades 20 are overlapped to realize sealing. The air valve blades 20 are in a "hand in hand" structure, and the airtightness is good when the ventilation valve 1 is closed.

In some possible implementations, the first V-shaped structure 231 of the damper blade 20 of the present application includes a connected first surface 2311 and a second surface 2312, and the first surface 2311 of the first V-shaped structure 231 is compared to The second surface 2312 is closer to the outer edge 2313 of the first V-shaped structure 231; the second V-shaped structure 241 includes a connected first surface 2411 and a second surface 2412, compared with the first surface 2411 of the second V-shaped structure 241 The second surface 2412 is closer to the outer edge 2413 of the second V-shaped structure 241 . When the ventilation valve 1 is in the closed state, the first surface 2311 of the first V-shaped structure 231 and the first surface 2411 of the second V-shaped structure 241 of adjacent damper blades 20 are attached to each other. That is, the first surface 2311 of the first V-shaped structure 231 of the damper vane 20 and the first surface 2411 of the second V-shaped structure 241 overlap together.

In some possible implementations, the outer edge 2313 of the first V-shaped structure 231 is designed with rounded corners, and the outer edge 2413 of the second V-shaped structure 241 is designed with rounded corners. The edges of the damper blades 20 are rounded to eliminate howling. For example, use a noise meter to test the noise when the ventilation valve is closed (0.5m away from the ventilation valve). After testing, when the ventilation valve 1 is fully closed and the pressure in front of the valve is 1200Pa, the noise is reduced by 5db, and the high-frequency whistling sound is completely eliminated. The air leakage rate dropped from 90cmh to 30cmh.

In some possible implementations, along the first direction, the opening of the first V-shaped structure 231 is arranged upward, and the opening of the second V-shaped structure 241 is arranged downward. After being arranged in this way, it is beneficial for the damper vanes 20 of the ventilation valve 1 to reversely rotate around their respective rotating shafts 21 to overlap each other. That is, it is beneficial to maintain the sealing performance when the ventilation valve 1 is switched from the open state to the closed state.

Exemplarily, the first surface 2311 and the second surface 2312 of the first V-shaped structure 231 of the present application are arranged at an obtuse angle, such as 135°. The first surface 2411 and the second surface 2412 of the second V-shaped structure 241 of the present application are arranged at an obtuse angle, such as 135°. This is beneficial to eliminate howling after adjacent damper blades 20 are overlapped, and reduce air leakage.

Referring to FIGS. 9 to 13 , a plurality of vane-type air flow meters 50 are provided in the inner chamber 11 of the valve body 10 of the ventilation valve 1 of the present application, so as to better measure the air volume passed through the ventilation valve 1 . Exemplarily, the distances from the axis of each vane-type air flow meter 50 to the center line O of the valve body 10 are not equal, so as to measure the air volume of the ventilation valve 1 with different rotation radii. In this application, FIG. 13 shows that three vane-type air flow meters 50 monitor the ventilation rate of the ventilation valve 1 , and the distances from the axes of the three vane-type air flow meters 50 to the centerline O of the valve body 10 are different. The present application does not limit the number of impeller-type air flow meters 50, and a corresponding number of impeller-type air flow meters 50 (for example, 4, 5, 6, etc.) can be set in the valve body 10 according to the needs of use. The air volumes of the outside, inside and middle of the ventilation valve 1 are better monitored.

Referring to FIG. 13 to FIG. 15 , a plurality of impeller air flow meters 50 are fixed in the valve body 10 of the ventilation valve 1 through a fixing bracket 60 . The fixed bracket 60 includes three sections that meet at one point, and each section of the fixed bracket 60 is provided with an impeller-type air flow meter 50 . Exemplarily, the fixing bracket 60 is fixed on the upper bowl cover 12 at the center of the valve body 10 through a fixing rod. Exemplarily, the fixing bracket 60 is provided with threaded holes, the upper bowl cover 12 is provided with threaded holes, the fixing rod is a screw rod extending along the first direction, and the two ends of the screw rod are threadedly connected with the fixing bracket 60 and the upper bowl cover 12 respectively.

14 to 18, each impeller air volume meter 50 includes: a rotating part 503, which can rotate in the circumferential direction (shown in the T direction in Figure 14); a plurality of impeller blades 504, arranged at intervals in the circumferential direction on the rotating part 503 On the outer peripheral surface of each impeller blade 504 includes a first part 5041 and a second part 5042 , and the first part 5041 is connected with the rotating part 503 . Wherein, along the second direction, the width of the first part 5041 gradually increases, the width of the second part 5042 is equal, the maximum width of the first part 5041 is equal to the width of the second part 5042, and the second direction is from the first part 5041 to the second part 5042, the second direction is perpendicular to the radial direction of the rotating part 503.

The shape of the impeller blade 504 formed by the first part 5041 and the second part 5042 is similar to a "shovel" shape. The shovel-shaped impeller blade 504 can increase the windward area, thereby increasing the thrust of the wind load on the impeller blade 504. The moment M exerted by the axis of the air volume meter 50 increases, so that the initial wind speed decreases, and a small air volume can push the impeller blades 504 to rotate. Here, M=L*F, L is the length of the impeller blade 504 (L1+L2 described later), and F is the force of the wind on the impeller blade 504 .

In some possible implementations, referring to FIG. 18 , the length of the first part 5041 of the impeller blade 504 is L1, and the length of the second part 5042 is L2, wherein 0.45≤L2/(L1+L2)≤0.6. After setting in this way, the impeller blades 504 have sufficient length to generate a windward area, so that the wind load can push the impeller blades 504 to rotate against the friction force. Exemplarily, the total length L of the impeller blades 504 ranges from 10 mm to 25 mm.

Exemplarily, the area of the first part 5041 of the impeller blade 504 is S1, and the area of the second part 5042 of the impeller blade 504 is S2, wherein, 1.2≤S2/S1≤1.5. Exemplarily, the windward area (S1+S2) of the impeller blades 504 ranges from 100 mm ² to 250 mm ² . This can increase the windward area, thereby increasing the thrust of the wind load on the damper blade 20 .

Continuing to refer to Fig. 18, the diameter of the rotating part 503 of the impeller air volume meter 50 of the present application is D2D1, and the outer diameter of the integral structure formed by the rotating part 503 and a plurality of impeller blades 504 (the outer diameter of O1 shown in Fig. 18 ) is R2,2≤R2/D2D1≤4. Exemplarily, the diameter of the impeller air flow meter 50 is reduced from Φ73 mm to Φ50 mm, so that the flow area occupied by the impeller air flow meter 50 is small and the small-diameter ventilation valve 1 becomes possible. Since the impeller-type air flow meter 50 becomes smaller, the weight is reduced, and the torque generated by the friction force on the axis of the impeller-type air flow meter 50 is reduced, and the impeller blades 504 can be pushed by a small air volume.

Referring to FIG. 19 , the angle between each impeller blade 504 of the present application and the horizontal direction (the angle between the dotted line F and the dotted line E in FIG. 19 ) is α, 30°≤α≤45°. Within this angle range, it is beneficial to push the impeller blades 504 with a small air volume. Exemplarily, the optimized impeller blade 504 structure reduces the initial wind speed from 0.8 m/s to 0.5 m/s.

Continuing to refer to FIG. 15 to FIG. 17 in conjunction with FIG. 20 to FIG. 22 , the impeller air flow meter 50 further includes: a housing 501 provided with first shaft seats 507 spaced along the first direction (shown in the Z direction in FIG. 22 ) and the second axle seat 506. Wherein, the housing 501 is provided with a first mounting seat 509 and a second mounting seat 502 along the first direction. The first mounting seat 509 is located below the housing 501 and is mounted on the fixed bracket 60 in the foregoing embodiment (refer to FIG. 15 ). The first mounting seat 509 has a first mounting hole 5091, and the first shaft seat 507 is mounted on the Inside a mounting hole 5091. The second mounting base 502 is located above the housing 501 and is connected to the inner wall of the housing 501. The second mounting base 502 includes three sections that converge at one point. The second mounting base 502 is provided with a first Two installation holes 5021 , the second shaft seat 506 is installed in the second installation holes 5021 .

In addition, the impeller air flow meter 50 also includes a pointed shaft 508 extending along the first direction. The pointed shaft 508 is located in the housing 501. The shaft hole 5031 of the rotating part 503 is sleeved on the pointed shaft 508. The two tips of the pointed shaft 508 are installed respectively. on the first shaft seat 507 and the second shaft seat 506 . Exemplarily, the rotating part 503 is fixedly connected with the pointed shaft 508 , and the rotating part 503 and the pointed shaft 508 rotate coaxially. The impeller-type air volume meter 50 of the present application does not adopt a bearing structure, but adopts a wear-resistant tip shaft 508 and a wear-resistant shaft seat structure. The ventilation valve 1 can be used in the occasion of digestion experiment (high-temperature heating with strong acid), and there is no problem of bearing being corroded. Moreover, the pointed shaft 508 structure can reduce the initial wind speed, and the impeller blades 504 can be driven to rotate with a small wind volume.

For example, referring to FIG. 20 , the two ends 5092 of the first mount 509 of the present application extend along a first direction (indicated by the Z direction in FIG. 20 ) and are inserted into the housing 501 , and snapped into the housing 501 . Exemplarily, an insertion hole 5011 is provided on the outer peripheral surface of the housing 501 , the two ends 5092 of the first mount 509 are inserted into the insertion hole 5011 of the housing 501 along the first direction, and snapped into the insertion hole 5011 of the housing 501 . The connection stability between the first mounting seat 509 and the housing 501 is improved.

Exemplarily, the anemometer vane-type air volume meter 50 of the present application adopts acid mist-resistant materials. Exemplarily, the tip shaft 508 is made of ceramics, such as zirconia or silicon carbide. The shaft seat is made of polytetrafluoroethylene (Poly tetrafluoroethylene, abbreviated as PTFE)) or artificial gemstones. The material of the impeller blades 504 and the rotating part 503 is PP (polypropylene, polypropylene) or PPS (Phenylenesulfide).

Continuing to refer to FIG. 20 and FIG. 22 , along the first direction, the second shaft seat 506 above the tip shaft 508 is an adjustment screw, and the adjustment screw is threaded with the housing 501 , that is, threaded with the second mounting hole 5021 to adjust The distance between the screw and the first shaft seat 507. The adjustment screw structure on the top of the tip shaft 508 can be used to calibrate the machining error of each tip shaft 508 in the first direction, adjust the rotation resistance of the tip shaft 508, so that when the air volume is the same, the speed of all the impeller blades 504 is the same, which is conducive to ventilation The air flow measurement of valve 1 and the improvement of measurement accuracy.

Although the utility model has been illustrated and described with reference to some preferred embodiments of the utility model, those skilled in the art should understand that the above content is a further detailed description of the utility model in conjunction with specific embodiments Therefore, it cannot be assumed that the specific implementation of the present utility model is only limited to these descriptions. Those skilled in the art may make various changes in form and details, including some simple deduction or replacement, without departing from the spirit and scope of the present invention.

Claims

A drive assembly for ventilation valve blades, the inner chamber of the ventilation valve is provided with a plurality of air valve blades, and the plurality of air valve blades are arranged along the circumference around the center line of the inner cavity, and the center line is along the first Extending in the direction, it is characterized in that the drive assembly includes:

driving device;

The transmission mechanism, the transmission mechanism includes:

The first-stage transmission part is connected with the driving device, and the first-stage transmission part is ring-shaped and used to be sleeved on the outer surface of the ventilation valve;

A plurality of secondary transmission parts corresponding to a plurality of air valve blades one by one, each of the secondary transmission parts is connected to the corresponding rotating shaft of the air valve blade and connected to the primary transmission part, each The rotation axis of the damper blade is perpendicular to the center line;

The driving device is used to drive the first-stage transmission part to rotate forward or reverse along the circumferential direction to synchronously drive each of the two-stage transmission parts, so that each of the two-stage transmission parts drives the corresponding air valve The blades rotate forward or reverse around their respective shafts;

During the forward rotation of the primary transmission part along the circumferential direction, the ventilation valve is switched from a closed state to an open state;

During the reverse rotation of the primary transmission portion in the circumferential direction, the ventilation valve is switched from the open state to the closed state.
The driving assembly according to claim 1, wherein the transmission mechanism drives each of the damper blades to rotate synchronously at the same angle around their respective rotating shafts, so that the ventilation valve is between a closed state and an open state switch.
The driving assembly according to claim 1, wherein the first-stage transmission part is a transmission ring, the second-stage transmission part is a vane driving rod, one end of the vane driving rod is rotatably connected to the transmission ring, and the other One end is fixedly connected to the rotating shaft of the air valve blade, and the other end of each blade driving rod can swing with the connection point between the rotating shaft and the air valve blade driving rod as a fulcrum.
The driving assembly according to claim 3, wherein the outer peripheral surface of the transmission ring is provided with a plurality of first protrusions corresponding to a plurality of the blade driving rods one by one, and the blade driving rods One end is provided with a first through hole extending along the extending direction of the vane lever, and the first protrusion corresponding to the vane lever is engaged in the first through hole, and can move along the The hole wall of the first through hole moves.
The drive assembly according to claim 1, wherein the primary transmission part is a transmission ring, the secondary transmission part includes a connecting rod and a rocker, and one end of the connecting rod is rotatably connected to the transmission ring, The other end is rotatably connected to one end of the rocker, and the other end of the rocker is fixedly connected to the rotating shaft of the damper blade.
The driving assembly according to claim 3 or 5, further comprising: a driving lever, one end of which is rotatably connected to the transmission ring, and the other end is fixedly connected to the driving device; The device is used to drive the driving lever to swing forward or reverse, so as to drive the transmission ring to rotate forward or reverse along the circumferential direction.
The driving assembly according to claim 6, wherein the outer peripheral surface of the transmission ring is provided with a second protrusion corresponding to the driving lever, and the one end of the driving lever is provided along the The second through hole extending in the extension direction of the driving lever, the second protrusion is locked in the second through hole and can move along the hole wall of the second through hole.
The drive assembly according to claim 1, wherein the primary transmission part is a gear plate, and one end of the gear plate in the first direction is provided with teeth distributed along the circumferential direction, and the circumferential direction surrounds The first direction; the secondary transmission part is a vane gear, and the vane gear is fixedly connected to the rotating shaft of the damper vane and meshes with the teeth of the gear plate.
The driving assembly according to claim 8, further comprising: a driving gear fixedly connected to the driving device and meshed with the teeth of the gear plate, the driving device is used to drive the driving gear forward or reverse rotation to drive the gear plate to rotate forward or reverse along the circumferential direction.
The driving assembly according to claim 1, wherein the driving device is a motor.
The driving assembly according to claim 1, wherein the damper vane is fan-shaped.