Valve continuous opening and closing dynamic torque testing device

Abstract

A valve continuous opening and closing dynamic torque testing device belongs to the field of valve performance testing. Comprising a dynamic torque testing device and a hydraulic station system. According to the dynamic torque testing device, a valve is connected with first and second connecting flanges; a valve rod shaft of the valve is coaxially connected with a first coupler, a torque sensor, a second coupler, an actuator output shaft, a third coupler and a rotary encoder, an actuator is installed at the upper end of the valve through an actuator support, and the torque sensor and a one-way Hall sensor are connected to the two ends of the actuator support. And a sensing element of the one-way Hall sensor is adsorbed on the output shaft of the actuator. The hydraulic station is connected with the first clamping sleeve flange pipeline and the second clamping sleeve flange pipeline through hydraulic station pipelines. The actuator controls opening and closing of the valve, the torque sensor continuously measures the dynamic torque of the valve, the rotary encoder continuously measures the rotating angle and the rotating speed of the valve, the one-way Hall sensor continuously measures the continuous opening and closing times of the valve, and the device can be used for measuring the dynamic torque of the valve in the continuous opening and closing state and designing, manufacturing and optimizing the valve.

Description

Technical Field

[0001] The invention belongs to the field of valve performance testing, and in particular relates to a valve continuous opening and closing dynamic torque testing device. Background Art

[0002] Valves are key control components of hydraulic systems, and the dynamic torque of valves is a key technical indicator of the comprehensive performance of valves. In the design process of valves, it is necessary to determine the output torque of the actuator based on the dynamic torque parameters of the valve. If the output torque of the actuator is too large, it will cause excess output torque of the actuator. If the output torque of the actuator is too small, it will cause difficulty in opening and closing the valve, and even cause the valve to get stuck. At present, there is no direct valve dynamic torque data in the field of valve performance testing, which makes it difficult to determine the dynamic torque of the valve and select the valve actuator. During the long-term service of the valve, the dynamic torque parameters of the valve will change significantly after a large number of continuous and frequent openings and closings, and the valve opening and closing speed will also have a great impact on the dynamic torque parameters. The existing valve testing equipment cannot obtain the relationship between the dynamic torque of the valve and the valve angle, speed and number of openings and closings. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a valve continuous opening and closing dynamic torque testing device, which can test the dynamic torque of the valve under different opening and closing times, different opening and closing speeds, and different rotation angles, and can also obtain the relationship between the valve dynamic torque and the valve rotation angle, opening and closing speed, and opening and closing times.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A valve continuous opening and closing dynamic torque test device, the valve continuous opening and closing dynamic torque test device is mainly composed of two parts, the first part is a dynamic torque test device, and the second part is a hydraulic station system. In the dynamic torque test device: the valve is connected to the first connecting flange 20 and the second connecting flange 23 and is located between the two, the first connecting flange 20, the first clamping flange 21 and the first fixed bracket 22 are connected and fixed, the second connecting flange 23, the second clamping flange 24 and the second fixed bracket 25 are connected and fixed; the valve stem shaft 2 is coaxially connected with the first coupling 3, the torque sensor 4, the second coupling 6, the actuator output shaft 7, the third coupling 10, and the rotary encoder 9, the upper end of the valve is connected with the actuator bracket 16, the actuator 8 is installed on the upper end of the actuator bracket 16, the torque sensor 4 and the unidirectional Hall sensor 14 are connected to the two ends of the actuator bracket 16, and the unidirectional Hall sensor sensing element 13 is adsorbed on the groove of the actuator output shaft 7. In the hydraulic station system: the hydraulic station 31 is connected to the second ferrule flange 24 and the first ferrule flange 21 pipelines through the hydraulic station pipeline, which is used to input a medium of a certain pressure into the valve. The valve opening and closing is controlled by the actuator 8, the dynamic torque of the valve is continuously measured by the torque sensor 4, the valve angle and speed are continuously measured by the rotary encoder 5, and the number of continuous opening and closing times of the valve is continuously measured by the unidirectional Hall sensor 14, which is used for the measurement of the dynamic torque of the valve in the continuous opening and closing state and the design, manufacture and optimization of the valve. The valve is the valve body 1 to be tested. The specific structure of each part is described as follows:

[0006] The dynamic torque test device includes a valve stem shaft 2, a first coupling 3, a torque sensor 4, a torque sensor bracket 5, a second coupling 6, an actuator 8, a rotary encoder 9, a third coupling 10, a rotary encoder bracket 12, a one-way Hall sensor sensing element 13, a one-way Hall sensor 14, a one-way Hall sensor bracket 15, an actuator bracket 16, a first pressure gauge 18, a second pressure gauge 19, a first connecting flange 20, a first ferrule flange 21, a first fixed bracket 22, a second connecting flange 23, a second ferrule flange 24, a second fixed bracket 25, an industrial computer 27 and a pipeline part. The hydraulic station system includes a hydraulic station 31 and a pipeline part. The valve 1 to be tested is connected to the first connecting flange 20 and the second connecting flange 23 through a second stud 29, and the first connecting flange 20 and the second connecting flange 23 are respectively provided with a first pressure gauge 18 and a second pressure gauge 19. The second fixing bracket 25, the second connecting flange 23 and the second ferrule flange 24 are connected by the first stud 28, the first fixing bracket 22, the first connecting flange 20 and the first ferrule flange 21 are connected by the third stud 30, the first fixing bracket 22 and the second fixing bracket 25 play a role in fixing the entire device, and the outer pipelines of the second ferrule flange 24 and the first ferrule flange 21 are connected to the hydraulic station 31.

[0007] The upper end of the valve to be tested 1 is provided with an actuator bracket 16, one side of the actuator bracket 16 is provided with a slot for fixing the torque sensor bracket 5, and the other side is provided with a slot for fixing the one-way Hall sensor bracket 15. The upper end is provided with an opening for passing the thin end 11 of the actuator output shaft 7, and the upper end of the actuator bracket 16 is evenly distributed with 8 openings for connecting the actuator 8. The lower end of the actuator bracket 16 is provided with an opening for passing the valve stem shaft 2 of the valve to be tested 1, and the lower end of the actuator bracket 16 is evenly distributed with 4 openings for connecting the valve to be tested 1, that is, the valve to be tested 1 and the actuator bracket 16 are connected by bolts, and the actuator 8 is installed on the upper end of the actuator bracket 16 and connected by bolts. The valve stem shaft 2 of the valve to be tested 1 is connected to the torque sensor 4 through the first coupling 3, and the actuator output shaft 7 is connected to the torque sensor 4 through the second coupling 6. The torque sensor bracket 5 is provided with multiple openings, and the torque sensor bracket 5 is connected to the slot on one side of the actuator bracket 16 by bolts, and can be moved up and down to adjust the appropriate position during installation. The torque sensor 4 is fixed to the opening of the torque sensor bracket 5 by means of bolts.

[0008] The thin end 11 of the actuator output shaft 7 is connected to the rotary encoder 9 through the third coupling 10. The upper end of the rotary encoder bracket 12 is provided with 4 openings, which are respectively used to pass the rotary encoder output shaft 7 and fix the rotary encoder 9, and the fixing method is bolt connection. The lower end of the rotary encoder bracket 12 is provided with 5 openings, which are respectively used to pass the thin end 11 of the actuator output shaft 7 and fix the rotary encoder 9. The rotary encoder 9 is fixed to the actuator 8 by bolts. A unidirectional Hall sensor sensing element 13 is installed on the actuator output shaft 7. The unidirectional Hall sensor sensing element 13 is a magnet and is adsorbed on the groove of the actuator output shaft 7. The unidirectional Hall sensor 14 is fixed on the unidirectional Hall sensor bracket 15. The unidirectional Hall sensor bracket 15 is provided with 4 openings and is fixed to the slot of the actuator bracket 16 by bolts. It can be moved up and down to adjust the appropriate position during installation.

[0009] The actuator 8 drives the actuator output shaft 7 to rotate, and the actuator output shaft 7 transmits torque to the valve stem shaft 2 of the valve to be tested 1 through the second coupling 6, the torque sensor 4 and the first coupling 3, so that the valve to be tested 1 is opened or closed. The torque sensor 4 measures the dynamic torque parameters of the valve to be tested 1 during the opening or closing process. The dynamic torque parameters are transmitted to the industrial computer 27 through the data acquisition card 26, and the dynamic torque parameters can be observed on the industrial computer 27. The rotary encoder 9 rotates coaxially with the actuator output shaft 7 and the valve stem shaft 2, and outputs the valve angle parameters to the industrial computer 27 through the data acquisition card 26.

[0010] Furthermore, the one-way Hall sensor sensing element 13 is a magnet, which is adsorbed on the groove of the actuator output shaft 7, and rotates 0°-90° along with the actuator output shaft 7. Each time the one-way Hall sensor sensing element 13 passes through the one-way Hall sensor 14, the output value of the one-way Hall sensor is increased by 1, that is, the one-way Hall sensor 14 can record the number of rotations of the actuator output shaft 7 within 0°-90°, which is the number of opening and closing times of the valve 1 to be tested. On the one hand, the one-way Hall sensor 14 transmits the recorded data to the counting display 17, and the number of opening and closing times of the valve 1 to be tested can be intuitively seen on the counting display 17; on the other hand, the one-way Hall sensor 14 transmits the recorded data to the industrial computer 27 through the data acquisition card 26. On the industrial computer 27, the dynamic torque of the valve 1 to be tested under different opening and closing times, different opening and closing speeds, and different rotation angles can be calculated based on the sensing data of the torque sensor 4, the rotary encoder 9, and the Hall sensor 14, and the relationship between the valve dynamic torque and the valve rotation angle, the opening and closing speed, and the opening and closing times can also be obtained.

[0011] The beneficial effects of the present invention are:

[0012] The present invention can continuously measure the dynamic torque of the valve during the opening and closing process according to the torque sensor, can continuously measure the valve angle and opening and closing speed according to the rotary encoder, can continuously measure the number of valve opening and closing according to the Hall sensor, and can further obtain the dynamic torque of the valve under different opening and closing times, different opening and closing speeds, and different angles, and can also obtain the relationship between the dynamic torque of the valve and the valve angle, opening and closing speed, and opening and closing times. The device has a simple structure and is easy to operate. It can be applied to the continuous opening and closing dynamic torque test of different types of valves, provides technical support for the dynamic torque measurement of valves under long-term service, and has high engineering application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The valve continuous opening and closing dynamic torque testing device provided by the present invention;

[0014] Figure 2 is a dynamic torque test device, (a) is a three-dimensional diagram of the dynamic torque test device, (b) is a front view of the dynamic torque test device, (c) is a left view of the dynamic torque test device, (d) is a right view of the dynamic torque test device, and (e) is a top view of the dynamic torque test device;

[0015] Figure 3 A bracket for the actuator;

[0016] Figure 4 A sensor bracket;

[0017] Figure 5 For fixing the bracket;

[0018] Figure 6A bracket for a rotary encoder;

[0019] Figure 7 It is a unidirectional Hall sensor and bracket;

[0020] Figure 8 is the actuator output shaft;

[0021] Fig. 9 For connecting flange;

[0022] Fig.10 It is a ferrule flange;

[0023] Fig.11 It is a unidirectional Hall sensor sensing element;

[0024] Fig.12 for the first and second couplings (both are identical);

[0025] Fig.13 is the third coupling;

[0026] Fig.14 is a torque sensor;

[0027] Fig.15 For hydraulic station;

[0028] In the figure: 1 valve body to be tested, 2 valve stem shaft, 3 first coupling, 4 torque sensor, 5 torque sensor bracket, 6 second coupling, 7 actuator output shaft, 8 actuator, 9 rotary encoder, 10 third coupling, 11 thin end of actuator output shaft 7, 12 rotary encoder bracket, 13 one-way Hall sensor sensing element, 14 one-way Hall sensor, 15 one-way Hall sensor bracket, 16 actuator bracket, 17 counting display, 18 first pressure gauge, 19 second pressure gauge, 20 first connecting flange, 21 first ferrule flange, 22 first fixed bracket, 23 second connecting flange, 24 second ferrule flange, 25 second fixed bracket, 26 data acquisition card, 27 industrial computer, 28 first stud, 29 second stud, 30 third stud, 31 hydraulic station. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with specific embodiments.

[0030] Figure 1It is a schematic diagram of a dynamic torque test device for continuous opening and closing of valves. The valve 1 to be tested is connected to the first connecting flange 20 and the second connecting flange 23 through the second stud 29. The first connecting flange 20 and the second connecting flange 23 are respectively provided with a first pressure gauge 18 and a second pressure gauge 19. The second fixing bracket 25, the second connecting flange 23 and the second ferrule flange 24 are connected through the first stud 28. The first fixing bracket 22, the first connecting flange 20 and the first ferrule flange 21 are connected through the third stud 30. The first fixing bracket 22 and the second fixing bracket 25 play a role in fixing the entire device. The outer pipelines of the second ferrule flange 24 and the first ferrule flange 21 are connected to the hydraulic station 31.

[0031] The upper end of the valve to be tested 1 is provided with an actuator bracket 16, one side of the actuator bracket 16 is provided with a slot for fixing the torque sensor bracket 5, and the other side is provided with a slot for fixing the one-way Hall sensor bracket 15. The upper end is provided with an opening for passing the thin end 11 of the actuator output shaft 7, and the upper end of the actuator bracket 16 is evenly distributed with 8 openings for connecting the actuator 8. The lower end of the actuator bracket 16 is provided with an opening for passing the valve stem shaft 2 of the valve to be tested 1, and the lower end of the actuator bracket 16 is evenly distributed with 4 openings for connecting the valve to be tested 1, that is, the valve to be tested 1 and the actuator bracket 16 are connected by bolts, and the actuator 8 is installed on the upper end of the actuator bracket 16 and connected by bolts. The valve stem shaft 2 of the valve to be tested 1 is connected to the torque sensor 4 through the first coupling 3, and the actuator output shaft 7 is connected to the torque sensor 4 through the second coupling 6. The torque sensor bracket 5 is provided with multiple openings, and the torque sensor bracket 5 is connected to the slot on one side of the actuator bracket 16 by bolts, and can be moved up and down to adjust the appropriate position during installation. The torque sensor 4 is fixed to the opening of the torque sensor bracket 5 by means of bolts.

[0032] The thin end 11 of the actuator output shaft 7 is connected to the rotary encoder 9 through the third coupling 10. The upper end of the rotary encoder bracket 12 is provided with 4 openings, which are respectively used to pass the rotary encoder output shaft 7 and fix the rotary encoder 9, and the fixing method is bolt connection. The lower end of the rotary encoder bracket 12 is provided with 5 openings, which are respectively used to pass the thin end 11 of the actuator output shaft 7 and fix the rotary encoder 9. The rotary encoder 9 is fixed to the actuator 8 by bolts. A unidirectional Hall sensor sensing element 13 is installed on the actuator output shaft 7. The unidirectional Hall sensor sensing element 13 is a magnet and is adsorbed on the groove of the actuator output shaft 7. The unidirectional Hall sensor 14 is fixed on the unidirectional Hall sensor bracket 15. The unidirectional Hall sensor bracket 15 is provided with 4 openings and is fixed to the slot of the actuator bracket 16 by bolts. It can be moved up and down to adjust the appropriate position during installation.

[0033] The actuator 8 drives the actuator output shaft 7 to rotate, and the actuator output shaft 7 transmits torque to the valve stem shaft 2 of the valve to be tested 1 through the second coupling 6, the torque sensor 4 and the first coupling 3, so that the valve to be tested 1 is opened or closed. The torque sensor 4 measures the dynamic torque parameters of the valve to be tested 1 during the opening or closing process. The dynamic torque parameters are transmitted to the industrial computer 27 through the data acquisition card 26, and the dynamic torque parameters can be observed on the industrial computer 27. The rotary encoder 9 rotates coaxially with the actuator output shaft 7 and the valve stem shaft 2, and outputs the valve angle parameters to the industrial computer 27 through the data acquisition card 26.

[0034] The one-way Hall sensor sensing element 13 is a magnet, which is adsorbed on the groove of the actuator output shaft 7 and rotates 0°-90° along with the actuator output shaft 7. Each time the one-way Hall sensor sensing element 13 passes through the one-way Hall sensor 14, the output value of the one-way Hall sensor is increased by 1, that is, the one-way Hall sensor 14 can record the number of rotations of the actuator output shaft 7 within 0°-90°, which is the number of opening and closing times of the valve 1 to be tested. On the one hand, the one-way Hall sensor 14 transmits the recorded data to the counting display 17, and the number of opening and closing times of the valve 1 to be tested can be intuitively seen on the counting display 17; on the other hand, the one-way Hall sensor 14 transmits the recorded data to the industrial computer 27 through the data acquisition card 26. On the industrial computer 27, the dynamic torque of the valve 1 to be tested under different opening and closing times, different opening and closing speeds, and different rotation angles can be calculated based on the sensing data of the torque sensor 4, the rotary encoder 9, and the Hall sensor 14, and the relationship between the valve dynamic torque and the valve rotation angle, the opening and closing speed, and the opening and closing times can also be obtained.

[0035] A process of using a valve continuous opening and closing dynamic torque test device includes the following steps:

[0036] During the actual test, first connect and fix the valve 1 to be tested, the first connecting flange 20, the second connecting flange 23, the first pressure gauge 18, the second pressure gauge 19, the second ferrule flange 24, the first ferrule flange 21, the first fixing bracket 22, and the second fixing bracket 25, and then install and fix the actuator bracket 16 on the valve 1 to be tested, install the torque sensor bracket 5 on the actuator bracket 16, install the first coupling 3, the torque sensor 4, the second coupling 6, the actuator output shaft 7 in sequence, and then install the actuator 8 on the actuator bracket 16. Install the rotary encoder bracket 12 on the actuator 8, and install the third coupling 10 and the rotary encoder 9 in sequence. Install the one-way Hall sensor sensing element 13, the one-way Hall sensor 14, and the one-way Hall sensor bracket 15, and place the counting display 17 on the actuator bracket 16.

[0037] The pipeline of the hydraulic station 31 is connected to the second ferrule flange 24 and the first ferrule flange 21. The torque sensor 4, the one-way Hall sensor 14, and the rotary encoder 9 are connected to the data acquisition card 26, the one-way Hall sensor 14 is connected to the counting display 17, and the output port of the data acquisition card 26 is connected to the industrial computer 27.

[0038] Before the test begins, turn on the industrial computer 27, torque sensor 4, rotary encoder 9, Hall sensor 14 and counting display 17. Manually adjust the valve 1 to be tested to a fully open position, and set the output angle value of the rotary encoder 9 at this position to 0°, and set the output angle value of the rotary encoder 9 after rotating 90° to 90°.

[0039] After the test begins, the hydraulic station 31 is turned on to input a medium of a certain pressure into the valve 1 to be tested. When the pressure values ​​displayed by the first pressure gauge 18 and the second pressure gauge 19 reach the test requirements, the actuator 8 is turned on to drive the valve 1 to be tested to repeatedly open and close. During the repeated opening and closing of the valve, the torque sensor 4 transmits the torque value to the industrial computer 27 through the data acquisition card 26 in real time, the rotary encoder 9 transmits the valve angle value to the industrial computer 27 through the acquisition card 26 in real time, and the unidirectional Hall sensor 14 records the number of openings and closings and transmits this parameter to the counting display 17 and the industrial computer 27. The dynamic torque of the valve 1 to be tested under different opening and closing times, different opening and closing speeds, and different angles is calculated on the industrial computer 27 based on the sensing data of the torque sensor 4, the rotary encoder 9, and the Hall sensor 14, and the relationship between the valve dynamic torque and the valve angle, opening and closing speed, and opening and closing times can also be obtained.

[0040] After obtaining the relevant data, the hydraulic station 31 is turned off, the actuator 8 is turned off, the torque sensor 4, the rotary encoder 9, the Hall sensor 14 and the counting display 17 are turned off, and the test data of the industrial computer 27 is read, and the test is completed.

[0041] The above-described embodiments merely express the implementation methods of the present invention, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A valve continuous opening and closing dynamic torque test device, characterized in that: The valve continuous opening and closing dynamic torque testing device comprises a dynamic torque testing device and a hydraulic station system; In the dynamic torque testing device, the valve is connected to the first connecting flange (20) and the second connecting flange (23) and is located between the two. The first connecting flange (20), the first ferrule flange (21) and the first fixed bracket (22) are fixedly connected. The second connecting flange (23), the second ferrule flange (24) and the second fixed bracket (25) are fixedly connected. The valve stem shaft (2) is coaxially connected to the first coupling (3), the torque sensor (4), the second coupling (6), the actuator output shaft (7), the third coupling (10) and the rotary encoder (9). The upper end of the valve is connected to the actuator bracket (16). The actuator (8) is installed on the upper end of the actuator bracket (16). The torque sensor (4) and the unidirectional Hall sensor (14) are connected to the two ends of the actuator bracket (16). The unidirectional Hall sensor sensing element (13) is adsorbed on the actuator output shaft (7). In the hydraulic station system: the hydraulic station (31) is connected to the second clamping flange (24) and the first clamping flange (21) pipelines through the hydraulic station pipeline, and is used to input a medium of a certain pressure into the valve; the valve opening and closing is controlled by the actuator (8), the dynamic torque of the valve is continuously measured by the torque sensor (4), the valve rotation angle and rotation speed are continuously measured by the rotary encoder (5), and the number of continuous opening and closing times of the valve is continuously measured by the unidirectional Hall sensor (14), which is used for measuring the dynamic torque of the valve in the continuous opening and closing state and for designing, manufacturing and optimizing the valve; the valve is a valve body (1) to be tested.

2. A valve continuous opening and closing dynamic torque testing device according to claim 1, characterized in that: The dynamic torque testing device comprises a valve stem shaft (2), a first coupling (3), a torque sensor (4), a torque sensor bracket (5), a second coupling (6), an actuator (8), a rotary encoder (9), a third coupling (10), a rotary encoder bracket (12), a one-way Hall sensor sensing element (13), a one-way Hall sensor (14), a one-way Hall sensor bracket (15), an actuator bracket (16), a first pressure gauge (18), a second pressure gauge (19), a first connecting flange (20), a first ferrule flange (21), a first fixed bracket (22), a second connecting flange (23), a second ferrule flange (24), a second fixed bracket (25), an industrial computer (27) and a pipeline part; the hydraulic station system comprises a hydraulic station (31) and a pipeline part; specifically as follows: The valve body (1) to be tested is connected to a first connecting flange (20) and a second connecting flange (23), and a first pressure gauge (18) and a second pressure gauge (19) are respectively provided on the first connecting flange (20) and the second connecting flange (23); the second fixing bracket (25), the second connecting flange (23) and the second ferrule flange (24) are connected via a first stud bolt (28), the first fixing bracket (22), the first connecting flange (20) and the first ferrule flange (21) are connected via a third stud bolt (30), the first fixing bracket (22) and the second fixing bracket (25) play a role in fixing the entire device, and the outer pipelines of the second ferrule flange (24) and the first ferrule flange (21) are connected to a hydraulic station (31); The upper end of the valve body (1) to be tested is provided with an actuator bracket (16), and the actuator (8) is installed on the upper end of the actuator bracket (16); one side of the actuator bracket (16) is provided with a slot for fixing the torque sensor bracket (5), which can be moved up and down to adjust the appropriate position during installation, and the torque sensor (4) is fixed on the torque sensor bracket (5); the other side of the actuator bracket (16) is provided with a slot for fixing the one-way Hall sensor bracket (15); the upper end of the actuator bracket (16) is provided with an opening for passing the thin end (11) of the actuator output shaft (7); the lower end of the actuator bracket (16) is provided with an opening for passing the valve stem shaft (2) of the valve body (1) to be tested; the valve stem shaft (2) of the valve body (1) to be tested is connected to the torque sensor (4) through a first coupling (3), and the actuator output shaft (7) is connected to the torque sensor (4) through a second coupling (6); The thin end (11) of the actuator output shaft (7) is connected to the rotary encoder (9) via a third coupling (10); an upper end of the rotary encoder bracket (12) is provided with openings, which are respectively used to pass the rotary encoder output shaft (7) and fix the rotary encoder (9); a lower end of the rotary encoder bracket (12) is provided with openings, which are respectively used to pass the thin end (11) of the actuator output shaft (7) and fix the rotary encoder (9), and the rotary encoder (9) is fixed on the actuator (8); a unidirectional Hall sensor sensing element (13) is installed on the actuator output shaft (7), and a unidirectional Hall sensor (14) is fixed on the unidirectional Hall sensor bracket (15); The actuator (8) drives the actuator output shaft (7) to rotate, and the actuator output shaft (7) transmits torque to the valve stem shaft (2) of the valve body (1) to be tested through the second coupling (6), the torque sensor (4) and the first coupling (3), so that the valve body (1) to be tested is opened or closed, and the torque sensor (4) measures the dynamic torque parameters during the opening or closing process of the valve body (1) to be tested, and the dynamic torque parameters are transmitted to the industrial computer (27) through the data acquisition card 26, and the dynamic torque parameters can be observed on the industrial computer (27); the rotary encoder (9) rotates coaxially with the actuator output shaft (7) and the valve stem shaft (2), and outputs the valve angle parameters to the industrial computer (27) through the data acquisition card (26).

3. A valve continuous opening and closing dynamic torque testing device according to claim 2, characterized in that: The one-way Hall sensor sensing element (13) is a magnet, which is adsorbed on the groove of the actuator output shaft (7) and rotates 0°-90° along with the actuator output shaft (7). The one-way Hall sensor (14) records the number of rotations of the actuator output shaft (7) within 0°-90°, which is the number of opening and closing times of the valve body (1) to be tested.

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