CN217207973U

CN217207973U - Electric valve and driving motor and position sensor thereof

Info

Publication number: CN217207973U
Application number: CN202220578759.8U
Authority: CN
Inventors: 周文; 赵战国; 魏猛; 付兴; 王宝; 王晓江; 王泽平; 宣宏斌; 黄帅; 陈键; 李晓飞
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: 2022-08-16
Anticipated expiration: 2032-03-17

Abstract

The utility model provides an electric valve and driving motor and position sensor thereof, this electric valve includes valve, driving motor and transmission, and this driving motor passes through transmission and is connected with the valve to the control flap switching is provided with position sensor on this driving motor, and position sensor includes: an upper cover; the lower cover is buckled with the upper cover to form an accommodating space; the sensor is arranged in the accommodating space; one end of the sensor shaft is connected with the sensor; the driving shaft sleeve is positioned in the accommodating space and is installed and supported in the upper cover and the lower cover through bearings, one end of the driving shaft sleeve is provided with a motor interface end connected with the driving motor, the other end of the driving shaft sleeve is provided with an external driving interface end, and the upper cover and the lower cover are respectively provided with openings corresponding to the motor interface end and the external driving interface end; and the transmission wheel pair is positioned in the accommodating space, a driving wheel of the transmission wheel pair is connected with the driving shaft sleeve, and a driven wheel of the transmission wheel pair is connected with the other end of the sensor shaft.

Description

Electric valve and driving motor and position sensor thereof

Technical Field

The utility model relates to an electric valve, especially an electric valve and driving motor and position sensor that conveniently realize networked centralized remote control.

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 prior art's above-mentioned defect, provide an electric valve and driving motor and position sensor thereof.

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

an upper cover;

the lower cover is buckled with the upper cover to form an accommodating space;

the sensor is arranged in the accommodating space;

one end of the sensor shaft is connected with the sensor;

the driving shaft sleeve is positioned in the accommodating space and is mounted and supported in the upper cover and the lower cover through bearings, one end of the driving shaft sleeve is provided with a motor interface end used for being connected with a driving motor, the other end of the driving shaft sleeve is provided with an external driving interface end, and the upper cover and the lower cover are respectively provided with openings corresponding to the motor interface end and the external driving interface end; and

and the transmission wheel pair is positioned in the accommodating space, a driving wheel of the transmission wheel pair is connected with the driving shaft sleeve, and a driven wheel of the transmission wheel pair is connected with the other end of the sensor shaft.

In the position sensor, the transmission wheel pair is a gear transmission pair, a synchronous pulley transmission pair or a magnetic transmission wheel pair.

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

In the position sensor, the driving wheel of the transmission wheel pair is connected with the middle part of the driving shaft sleeve through key connection, interference fit or jackscrew fixation.

The position sensor is characterized in that the sensor is fixed on the upper cover, and the upper cover is mounted on the housing of the driving motor through a fastener.

In the position sensor, the motor interface end of the driving shaft sleeve is connected with the tail shaft of the driving motor through a flat key or a spline, and the external driving interface end of the driving shaft sleeve is connected with the manual driving device or the calibration device through a square shaft mortise and tenon.

In the position sensor, the driving motor is an ac asynchronous motor, and the position sensor is mounted in a cavity at the tail of the ac asynchronous motor.

In order to better achieve the above object, the present invention further provides a driving motor, wherein the driving motor 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 driving motor is the driving motor.

In the electrically operated valve, the driving motor is an ac asynchronous motor.

The utility model has the beneficial effects that:

the utility model discloses a position sensor detects alternating current asynchronous motor's angle displacement to give the driver of valve with the angle displacement signal transmission, 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, speed and the accurate control of moment of torsion. The valve is 'stopped accurately', 'closed tightly' and 'opened', and the requirements of quick opening and quick closing, water hammer elimination, working condition of the regulating valve and fault handling are met.

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 structural view of an electric valve according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a position sensor according to an embodiment of the present invention;

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

fig. 4A is a schematic view illustrating a connection between a position sensor and a driving motor according to an embodiment of the present invention;

fig. 4B is a schematic view of a position sensor and a driving motor according to another embodiment of the present invention;

fig. 5A is a schematic structural view of a position sensor motor interface end according to an embodiment of the present invention;

fig. 5B is a schematic structural view of a position sensor motor interface end according to another embodiment of the present invention;

fig. 6A is a schematic structural diagram of a driving wheel pair according to an embodiment of the present invention;

fig. 6B is a schematic structural view of a driving wheel pair according to another embodiment of the present invention;

fig. 7 is a schematic diagram of a position sensor connection according to an embodiment of the present invention.

Wherein the reference numerals

1 valve

2 drive unit

21 driving flange

3 drive motor

31 outer casing

32 electric motor shaft

33 electric machine flange

34 flat key

35 spline

4 driver

5 position sensor

51 Upper cover

52 lower cover

53 sensor

54 sensor shaft

55 driving wheel pair

56 bearing

57 drive shaft sleeve

571 electric machine interface end

572 external drive interface end

58 fastener

59 square shaft

6 Manual drive or calibration device

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, driving motor 3 and transmission 2, driving motor 3 passes through transmission 2 with valve 1 is connected, and control valve 1's switching still can include driver 4, and this driver 4 is connected with driving motor 3. A position sensor 5 is provided on the drive motor 3, and the drive motor 3 is preferably an ac asynchronous motor. The position sensor 5 is used for monitoring the angular displacement of the alternating current asynchronous motor and transmitting an angular displacement signal to the driver 4 of the valve 1. The ac asynchronous motor is fastened to the drive flange 21 of the drive 2 via a motor flange 33. The ac asynchronous motor transmits a motor torque to the transmission 2 through the motor shaft 32, and the transmission 2 drives the valve 1 to perform an opening or closing motion after decelerating. 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 position sensor 5 according to an embodiment of the present invention. The utility model discloses a position sensor 5, include: an upper cover 51; the lower cover 52 is buckled with the upper cover 51 to form an accommodating space; a sensor 53 disposed in the accommodating space; a sensor shaft 54, one end of which is connected with the sensor 53 and the other end of which is connected and fixed with a driven wheel of a transmission wheel pair 55; a driving shaft sleeve 57 located in the accommodating space and mounted and supported in the upper cover 51 and the lower cover 52 through a bearing 56, wherein one end of the driving shaft sleeve 57 is provided with a motor interface end 571 for connecting with the driving motor 3, the other end of the driving shaft sleeve 57 is provided with an external driving interface end 572, and the upper cover 51 and the lower cover 52 are respectively provided with openings corresponding to the motor interface end 571 and the external driving interface end 572; and a driving wheel pair 55 located in the accommodating space, a driving wheel of the driving wheel pair is connected with the driving shaft sleeve 57, and a driven wheel of the driving wheel pair can be connected with the other end of the sensor shaft 54 through a key, interference fit, jackscrew fixation and the like.

Referring to fig. 3, fig. 3 is a schematic diagram of a mounting position of the position sensor 5 according to an embodiment of the present invention. The drive motor 3 is preferably an ac asynchronous motor, and the position sensor 5 is mounted in the rear cavity of the ac asynchronous motor. The sensor 53 is fixed to the upper cover 51, and the upper cover 51 is mounted to the housing 31 of the driving motor 3 by a fastener 58.

Referring to fig. 4A-5B, fig. 4A is the position sensor 5 of an embodiment of the present invention is connected with driving motor 3 schematically, fig. 4B is the position sensor 5 of another embodiment of the present invention is connected with driving motor 3 schematically, fig. 5A the present invention is an embodiment of the present invention, i.e., a schematic view of the position sensor 5 motor interface end 571, fig. 5B the present invention is an embodiment of the present invention, i.e., a schematic view of the position sensor 5 motor interface end 571. The driving wheel of the transmission wheel pair of the embodiment can be connected with the middle part of the driving shaft sleeve 57 through key connection, interference fit or jackscrew fixation. For example, the two ends of the driving shaft sleeve 57 are engaged with a pair of bearings 56, and the bearings 56 at the two ends are respectively connected and fixed with the upper cover 51 and the lower cover 52. The motor interface end 571 of the driving shaft sleeve 57 is connected with the tail part of the motor shaft 32 of the driving motor 3 through a flat key 34 (see fig. 4A and 5A) or a spline 35 (see fig. 4B and 5B) to transmit power to the motor shaft 32; the external drive interface end 572 of the drive sleeve 57 may be connected to the manual drive or calibration device 6 via a square shaft 59.

Referring to fig. 6A and 6B, fig. 6A is a schematic structural view of a driving wheel set 55 according to an embodiment of the present invention, and fig. 6B is a schematic structural view of a driving wheel set 55 according to another embodiment of the present invention. The transmission wheel pair of the present invention can be a gear transmission pair (as shown in fig. 2), a synchronous pulley transmission pair (as shown in fig. 6A) or a magnetic transmission wheel pair (as shown in fig. 6B). The sensor 53 may be an absolute encoder, a relative encoder, a rotary transformer, or the like.

Referring to fig. 7, fig. 7 is a schematic diagram of a position sensor connection according to an embodiment of the present invention. The position sensor 5 of the present embodiment is preferably installed in the rear cavity of the ac asynchronous motor, the position sensor 5 is positioned with the motor housing 31 using a seam allowance, and the position sensor 5 is fixed on the motor housing 31 by a fastening member 58 (such as a bolt). The front end of the driving boss 57 of the position sensor 5 is connected to the end of the motor shaft 32 through a shaft key or spline shaft.

When the valve opening and closing device works, the tail end of a motor shaft 32 of an alternating current asynchronous motor is connected with the front end of a driving shaft sleeve 57, the rotary motion of the motor shaft 32 of the alternating current asynchronous motor is converted into the rotary motion of the driving shaft sleeve 57, the rotary motion of the driving shaft sleeve 57 is converted into the rotary motion of a sensor shaft 54 through a transmission pair, the rotary motion of the sensor shaft 54 is converted into an electric signal of a position sensor 5, the position sensor 5 transmits the electric signal to a driver 4 through a cable, and the driver 4 can enable the driver to match different control modes according to position signals of different working stages divided by a valve opening and closing process, so that the accurate control of the output position, the speed and the torque of the driving motor is realized, and the valve 1 is stopped accurately, closed tightly and opened.

The utility model discloses a position sensor 5 detects alternating current asynchronous motor's angle displacement to give valve 1's driver 4 with the angle displacement signal transmission, 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 valve 1 "stops accurately", "close tight" and "open", satisfy the requirement of fast-opening fast switch, the water hammer is eliminated, governing valve operating mode, the trouble reply.

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:

an upper cover;

the lower cover is buckled with the upper cover to form an accommodating space;

the sensor is arranged in the accommodating space;

one end of the sensor shaft is connected with the sensor;

2. The position sensor of claim 1, wherein the drive wheel set is a gear drive set, a synchronous pulley drive set, or a magnetic drive wheel set.

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

4. The position sensor according to claim 1 or 2, wherein the driving wheel of the transmission wheel set is fixedly connected with the middle part of the driving shaft sleeve by key connection, interference fit or jackscrew.

5. The position sensor according to claim 1 or 2, wherein the sensor is fixed to the upper cover, and the upper cover is mounted to a housing of the driving motor by a fastener.

6. The position sensor according to claim 1 or 2, wherein the motor interface end of the drive sleeve is connected with the tail shaft of the drive motor by a flat key or a spline, and the external drive interface end of the drive sleeve is connected with the manual drive device or the calibration device by a square shaft mortise and tenon.

7. The position sensor of claim 6, wherein the drive motor is an ac asynchronous motor, and the position sensor is mounted in a rear cavity of the ac asynchronous motor.

8. A drive motor, characterized in that the drive motor is provided with a position sensor according to any one of the preceding claims 1-7.

9. An electric 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 opening and closing of the valve, and the driving motor is the driving motor of the claim 8.

10. The electrically operated valve as set forth in claim 9 wherein said drive motor is an ac asynchronous motor.