CN217153197U

CN217153197U - Electric valve and transmission device and position sensor thereof

Info

Publication number: CN217153197U
Application number: CN202220588520.9U
Authority: CN
Inventors: 周文; 赵战国; 魏猛; 王泽平; 付兴; 戚文华; 郝云轩; 王宝; 曹希伟; 王同善; 张磊
Original assignee: Beijing Raymond Saibo Nuclear Equipment Technology Research Co ltd
Current assignee: Beijing Raymond Saibo Nuclear Equipment Technology Research Co ltd
Priority date: 2022-03-17
Filing date: 2022-03-17
Publication date: 2022-08-09
Anticipated expiration: 2032-03-17

Abstract

The utility model provides an electric valve and transmission and position sensor thereof, this electric valve includes valve, driving motor and transmission, driving motor pass through transmission with the valve is connected, and control the switching of valve, be provided with position sensor on this transmission, this position sensor includes: a housing; a sensor disposed within the housing; and one end of the sensor shaft is connected with the sensor, and the other end of the sensor shaft is connected with a driving shaft of the transmission device. The utility model discloses a rotary motion of position sensor with transmission's worm is the rotary motion of sensor axle, and the rotary motion of sensor axle is the signal of telecommunication of position sensor, and position sensor transmits the signal of telecommunication to the driver, makes its position signal according to the different working phases that the ooff valve process was divided, matches different control mode, realizes the accurate control of driving motor's output position, speed and moment of torsion.

Description

Electric valve and transmission device and position sensor thereof

Technical Field

The utility model relates to an electric valve, especially an electric valve and transmission and position sensor thereof.

Background

The valve electric device in the prior art adopts a power supply to directly start an alternating current asynchronous motor, and the motor drives a mechanical transmission mechanism to drive a valve to operate so as to realize valve opening/closing. The alternating current asynchronous motor has the advantages of simple structure, reliable operation, light weight, low price, larger starting torque and the like, is widely applied to an electric device, but in the using process, the stopping mode of opening/closing the valve adopts point position type triggering stopping, namely, a travel switch (or a reed switch) is respectively arranged at the stopping point of the opening/closing valve of the valve body, and the valve is stopped according to the position signal of the travel switch (or the reed switch); because the inherent contact mechanical clearance and the repetitive control precision error of the travel switch (or the reed switch) are larger, the valve is not closed tightly and stops or cannot stop after being closed tightly, and the valve is leaked or the sealing surface of the valve is damaged by collision or the alternating current asynchronous motor cannot stop and is burnt. The point-position type trigger stop mode realized by a complex mechanical transmission system (a counter and a torque protection device) can not realize full-stroke high-precision position control, and also greatly increases the manufacturing cost. The stress of the valve seat when the valve is closed in place cannot be controlled, the specific pressure required by sealing cannot be established, and the valve is easy to be closed untight, so that the valve is easy to leak. The networked centralized remote control with high reliability and strong anti-interference performance cannot be realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the above-mentioned defect of prior art, provide an electric valve and transmission and position sensor thereof.

In order to achieve the above object, the present invention provides a position sensor, wherein, include:

a housing;

a sensor disposed within the housing; and

and one end of the sensor shaft is connected with the sensor, and the other end of the sensor shaft is connected with a driving shaft of the transmission device.

In the position sensor, the transmission device includes a box, and an input shaft, an output shaft and a worm-and-gear pair which are arranged in the box, a worm gear of the worm-and-gear pair is mounted on the output shaft, the output shaft is supported and mounted on the box through a bearing, two ends of a worm of the worm-and-gear pair are supported and mounted on the box, and one end of the worm and the input shaft are an integrated structural member.

In the position sensor, the sensor shaft is directly connected with the other end of the worm-and-gear pair through a key or a spline, and is coaxially arranged.

In the position sensor, the sensor shaft is connected with the other end of the worm-and-gear pair through the magnetic transmission gear pair.

In the position sensor, the sensor shaft is connected to the other end of the worm-and-gear pair through a gear transmission mechanism.

In the position sensor, the gear transmission mechanism comprises a driving shaft sleeve and a gear transmission pair, a driving wheel of the gear transmission pair is connected with the driving shaft sleeve, and a driven wheel of the gear transmission pair is connected with the other end of the sensor shaft.

The position sensor described above, wherein the sensor is an absolute encoder, a relative encoder, or a rotary transformer.

In the position sensor, the position sensor and the transmission device are positioned by a stop opening, and the housing is mounted on the box body through a fastener.

In order to better achieve the above object, the present invention further provides a transmission device of the valve, wherein the transmission device is provided with the above position sensor.

In order to better achieve the above object, the present invention further provides an electric valve, which includes a valve, a driving motor and a transmission device, wherein the driving motor passes through the transmission device and the valve is connected to control the opening and closing of the valve, and the transmission device is the transmission device.

The utility model has the beneficial effects that:

the utility model discloses a position sensor detects transmission's angle displacement, and give the driver of valve with the angle displacement signal transmission, at first convert driving motor's rotary motion into the rotary motion of transmission's worm, position sensor converts the rotary motion of worm into the rotary motion of sensor axle, the rotary motion of sensor axle converts position sensor's signal of telecommunication into, position sensor transmits the signal of telecommunication to the driver, make its position signal according to the different working phases of ooff valve process division, match different control mode, realize driving motor's output position, the accurate control of speed and moment of torsion, so that the valve "stops accurately", "close" and "open", satisfy the fast-opening fast-closing, the water hammer is eliminated, the governing valve operating mode, the requirement of trouble reply.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

Drawings

Fig. 1 is a schematic view of an electric valve according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a transmission device according to an embodiment of the present invention;

fig. 3 is a schematic view of a position sensor mounting structure according to an embodiment of the present invention;

fig. 4 is a schematic view of a position sensor mounting structure according to another embodiment of the present invention;

fig. 5 is a schematic view of a position sensor mounting structure according to another embodiment of the present invention.

Wherein the reference numerals

1 valve

2 drive unit

21 driving flange

22 case

23 input shaft

24 worm

25 worm wheel

26 bearing

27 output shaft

3 drive motor

31 motor flange

32 outer casing

4 driver

5 position sensor

51 casing

52 sensor

53 sensor shaft

54 drive mechanism

55 bearing

Detailed Description

The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:

referring to fig. 1, fig. 1 is a schematic structural diagram of an electric valve 1 according to an embodiment of the present invention. The utility model discloses an electric valve 1, including valve 1, transmission 2 and driving motor 3, driving motor 3 passes through transmission 2 with valve 1 connects, and control valve 1's switching, electric valve 1 still can include driver 4, and this driver 4 is installed on driving motor 3's shell 32. A position sensor 5 is arranged on the transmission 2. The drive motor is preferably an ac asynchronous motor, and the position sensor 5 is used for monitoring the angular displacement of the actuator 2 and for transmitting an angular displacement signal to the actuator 4 of the valve 1. A motor shaft of the alternating current asynchronous motor can be connected with an input shaft of the transmission device 2 through a shaft key, the torque of the motor is transmitted to the transmission device 2, and the transmission device 2 drives the valve 1 to perform opening or closing actions after speed reduction. The driving motor 3 is positioned with the transmission flange 21 of the transmission device 2 through the motor flange 31 and is connected and fixed through bolts. The composition, structure, mutual position relation, connection relation and theory of operation etc. of this electric valve 1 other parts all can refer to more ripe prior art, so no longer give unnecessary details here, and it is only right below the utility model discloses a position sensor 5 gives detailed description.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a transmission 22 according to an embodiment of the present invention. The transmission device 2 comprises a box body 22, and an input shaft 23, an output shaft 27 and a worm-and-gear pair which are arranged in the box body 22, wherein a transmission flange 21 is arranged on one side of the box body 22, a worm wheel 25 of the worm-and-gear pair is arranged on the output shaft 27, the output shaft 27 is supported and arranged on the box body 22 through a bearing 26, two ends of a worm 24 of the worm-and-gear pair can be supported and arranged on the box body 22 through bearings, one end of the worm 24 and the input shaft 23 are preferably an integral structural part, and the axis of the output shaft 27 is perpendicular to the axis of the input shaft 23. The position sensor 5 is positioned at an opening of the transmission 2, and a housing 51 of the position sensor 5 is fixedly mounted on the box 22 of the transmission 2 by a fastener (such as a bolt). The position sensor 5 is connected with the driving shaft of the transmission device 2 through a transmission mechanism 54, and the transmission mechanism 54 can be a gear pair, a magnetic transmission wheel or a key-connected direct drive structure and the like.

Referring to fig. 3, fig. 3 is a schematic view of an installation structure of the position sensor 5 according to an embodiment of the present invention. The utility model discloses a position sensor 5, include: a housing 51; a sensor 52 disposed in the housing 51, wherein the sensor 52 may be an absolute encoder, a relative encoder or a rotary transformer; and a sensor shaft 53 having one end connected to the sensor 52 and the other end of the sensor shaft 53 connected to the transmission 2. The transmission mechanism 54 of this embodiment is a direct drive structure with a key connection, i.e. the sensor shaft 53 is directly connected to the other end of the worm 24 of the worm-and-gear pair through a key or a spline, and is coaxially disposed.

Referring to fig. 4, fig. 4 is a schematic view of a mounting structure of a position sensor 5 according to another embodiment of the present invention. The sensor shaft 53 of the present embodiment is connected to the other end of the worm 24 of the worm-and-gear pair through a magnetic transmission wheel pair. One end of the sensor shaft 53 is connected with the sensor 52, the other end of the sensor shaft 53 is connected with the first magnetic wheel in the magnetic transmission wheel set, and the second magnetic wheel in the magnetic transmission wheel set is connected with the other end of the worm 24, namely, the end opposite to the input shaft 23.

Referring to fig. 5, fig. 5 is a schematic view of a mounting structure of a position sensor 5 according to another embodiment of the present invention. In this embodiment, the transmission mechanism 54 is a gear pair structure, that is, the sensor shaft 53 is connected to the other end of the worm 24 of the worm-and-gear pair through the gear transmission mechanism. The gear transmission mechanism comprises a driving shaft sleeve and a gear transmission pair, a driving wheel of the gear transmission pair is connected with the driving shaft sleeve, a driven wheel of the gear transmission pair is connected with the other end of the sensor shaft 53, the driving shaft sleeve is supported on the shell 51 through a bearing 55, the driving shaft sleeve is connected with the other end of the worm 24 of the transmission device 2, namely one end opposite to the input shaft 23, namely the driving shaft sleeve and the input shaft 23 are respectively connected with two ends of the worm 24.

The utility model discloses a position sensor 5 is used for transmission 2's angle displacement monitoring to give driver 4 with the angle displacement signal transmission. The transmission device 2 is preferably a worm gear transmission mechanism, a motor shaft of an alternating current asynchronous motor can be connected with a worm 24 shaft of the transmission device 2 through a shaft key, the motor rotary motion is converted into the rotary motion of the shaft of the worm 24, the position sensor 5 is fixed on a box body 22 of the transmission device 2, and the rotary motion of the worm 24 is converted into the rotary motion of a sensor shaft 53 directly or through a transmission pair. The position sensor 5 can convert the rotation of the worm 24 of the transmission device 2 into the rotation of the sensor shaft 53 through a transmission mechanism 54 such as a gear pair, a magnetic wheel pair, a synchronous gear pair, etc., and the position sensor 5 and the worm 24 can also be directly connected through a shaft key or a spline shaft, thereby directly converting the rotation of the worm 24 into the rotation of the sensor shaft 53. The rotary motion of the sensor shaft 53 is further converted into an electric signal of the position sensor 5, the position sensor 5 transmits the electric signal to the driver 4 through a cable, and the driver is matched with different control modes according to position signals of different working stages divided according to the process of opening and closing the valve, so that the accurate control of the output position, the speed and the torque of the driving motor is realized. .

Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.

Claims

1. A position sensor, comprising:

a housing;

a sensor disposed within the housing; and

2. The position sensor according to claim 1, wherein the transmission device comprises a box body, and an input shaft, an output shaft and a worm-and-gear pair which are arranged in the box body, wherein a worm wheel of the worm-and-gear pair is mounted on the output shaft, the output shaft is supported and mounted on the box body through a bearing, two ends of a worm of the worm-and-gear pair are supported and mounted on the box body, and one end of the worm is an integral structural member with the input shaft.

3. The position sensor according to claim 2, wherein the sensor shaft is directly connected to the other end of the worm-and-gear pair by a key or a spline and is coaxially disposed.

4. The position sensor of claim 2, wherein the sensor shaft is connected to the other end of the worm-and-gear pair by a magnetic drive gear pair.

5. The position sensor of claim 2, wherein the sensor shaft is connected to the other end of the worm-and-gear pair by a gear drive.

6. The position sensor of claim 5, wherein the gear train includes a drive sleeve and a gear train pair, a drive wheel of the gear train pair being coupled to the drive sleeve and a driven wheel of the gear train pair being coupled to the other end of the sensor shaft.

7. The position sensor of claim 1, 2, 3, 4, 5 or 6, wherein the sensor is an absolute encoder, a relative encoder or a rotary transformer.

8. The position sensor of claim 2, 3, 4, 5 or 6, wherein the position sensor is positioned as a stop with the transmission, and the housing is mounted to the housing by fasteners.

9. Actuator for a valve, characterized in that the actuator is provided with a position sensor according to any of the preceding claims 1-8.

10. An electrically operated valve comprising a valve, a driving motor and a transmission device, wherein the driving motor is connected with the valve through the transmission device and controls the valve to open and close, and the transmission device is the transmission device of claim 9.