Torque reversing device of valve test bed

Abstract

A driving gear box and a driven gear box are fixed to the front end and the rear end of the test bed respectively, a hydraulic motor is located at the front end of the test bed, an output shaft of the hydraulic motor is provided with an execution rod, the lower portion of the execution rod is provided with a driving gear in the transverse direction, and the driving gear is located in the driving gear box; a second driven gear is vertically arranged at the front end of the driving rod, the side face of the driving gear is meshed with the upper end of the second driven gear, an execution plug is arranged at the front end of the driven rod, a third driven gear is arranged at the rear end of the driving rod, a fourth driven gear is arranged at the rear end of the driven rod, and the third driven gear is in transmission connection with the fourth driven gear. The driven gear box is mounted on the moving platform, and a dynamic torque sensor and an angle sensor are arranged at the rear end of the driven rod; when a butterfly valve type valve opening and closing service life test is carried out, vertical rotation execution torque of the service life test bed is converted into horizontal rotation torque, and the driving device is matched with the valve located on the side face.

Description

Technical Field

[0001] The invention relates to the technical field of valve pressure testing, and in particular to a torque reversing device of a valve test bench. Background Art

[0002] The hydraulic valve test bench is a necessary pressure test equipment for the factory testing of industrial valves. It can carry out conventional valve housing strength tests and sealing tests. The test bench with a torque actuator can also carry out valve functional torque, functional strength and valve life tests.

[0003] For valves with actuators on the top, such as gate valves and stop valves, conventional life test benches can conveniently perform opening and closing life tests through their torque actuators; however, for valves with actuators on the side, such as butterfly valves and some ball valves, there are no directly operable actuators. When these valves are subjected to opening and closing life tests, the valve's built-in actuator is usually removed to expose the valve stem, and the test bench torque actuator is directly connected to the valve stem to conduct opening and closing life tests in this way, or a torque wrench is used to manually open and close the valve. This method is time-consuming and labor-intensive, and poses a safety hazard. Summary of the invention

[0004] The purpose of the invention is to provide a torque reversing device for a valve test bench.

[0005] In order to achieve the above object, the technical solution of the present invention is: A torque reversing device for a valve test bench, characterized in that it comprises a hydraulic motor, a driving gear box, a driving rod, a driven gear box and a driven rod, the driving gear box and the driven gear box are respectively fixed to the front end and the rear end of the test bench, the hydraulic motor is located at the front end of the test bench, the output shaft of the hydraulic motor is provided with an actuator rod, the hydraulic motor drives the actuator rod to move through a reducer, a driving gear is laterally provided at the lower part of the actuator rod, the driving gear is located in the driving gear box, the front and rear ends of the driving rod extend into the driving gear box and the driven gear box respectively, a second driven gear is vertically provided at the front end of the driving rod, the second driven gear is located in the driving gear box, and the side surface of the driving gear meshes with the upper end of the second driven gear to transmit The driven rod is provided with an execution plug at the front end, and the third driven gear is provided at the rear end of the driving rod. The third driven gear is installed in the driven gear box through a locating pin. The driven rod and the driving rod are arranged in parallel along the front-to-back direction. The rear end of the driven rod extends into the driven gear box. The rear end of the driven rod is provided with a fourth driven gear, and the fourth driven gear is installed in the driven gear box through a locating pin. The third driven gear is connected with the fourth driven gear in transmission. The driven gear box is installed on a mobile platform, and the mobile platform can move in six directions: front, back, left, right, up and down. A dynamic torque sensor and an angle sensor are provided at the rear end of the driven rod, and the dynamic torque sensor and the angle sensor are connected to the computer communication of the test bench.

[0006] Furthermore, the driving gear is provided with four circumferential positioning pins along the circumferential direction, and the driving gear is fixedly connected to the actuator rod via the circumferential positioning pins.

[0007] Furthermore, an axial positioning pin is provided at the lower end of the actuator rod, and the axial positioning pin is rotatably connected to a positioning seat at the bottom of the driving gear box.

[0008] Furthermore, a first driven gear is provided at the front of the driving gear box, the first driven gear is installed in the driving gear box through a positioning pin, and the side surface of the driving gear is meshed with the upper end of the first driven gear for transmission.

[0009] Furthermore, a first transmission gear and a second transmission gear are vertically provided in the driven gear box, and the first transmission gear and the second transmission gear are installed in the driven gear box through positioning pins, and the side surface of the third driven gear is meshed with the side surface of the first transmission gear for transmission, the side surface of the first transmission gear is meshed with the side surface of the second transmission gear for transmission, and the side surface of the second transmission gear is meshed with the side surface of the fourth driven gear for transmission.

[0010] Furthermore, the front end of the driving rod is sleeved with a first bearing, the first bearing is located at the rear side of the second driven gear, and the first bearing is fixed to the rear side wall of the driving gear box.

[0011] Furthermore, a first connecting block is provided in the middle of the driving rod, and the first connecting block fixedly connects the two rod bodies of the driving rod.

[0012] Furthermore, a support column is vertically provided on the upper edge of the mobile platform, and the support column fixedly supports the lower end of the driven gear box.

[0013] Furthermore, a second connecting block is provided in the middle of the driven rod, and the second connecting block is fixedly connected to the two rod bodies of the driven rod.

[0014] Furthermore, the outer side of the second connecting block is sleeved with the second bearing, the front side of the supporting column is provided with a rod bracket, the upper end of the rod bracket is provided with a semicircular ring, and the ring carries the second bearing.

[0015] The present invention can be adapted to the torque actuator of the original valve life test bench. When conducting a butterfly valve type valve opening and closing life test, the vertical rotation execution torque of the life test bench is converted into a horizontal rotation torque, and the valve with the drive device located on the side is adapted. At the same time, the present invention is equipped with angle and torque sensors, which can directly transmit data with the test bench, and monitor the butterfly valve life test torque, angle, and opening and closing circle number information in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the gear transmission of the present invention; Figure 3 It is a schematic structural diagram of the gear belt gear box of the present invention.

[0017] Reference numerals: 1 hydraulic motor, 2 reducer, 3 actuator, 4 circumferential positioning pin, 5 axial positioning pin, 6 first driven gear, 7 driving gear, 8 second driven gear, 9 first bearing, 10 driving rod, 11 transmission gear box, 12 angle sensor, 13 dynamic torque sensor, 14 second bearing, 15 driven rod, 16 execution plug, 17 rod bracket, 18 test bench, 19 driving gear box, 20 third driven gear, 21 fourth driven gear, 22 first transmission gear, 23 second transmission gear, 24 first connecting block, 25 moving platform, 26 supporting column, 27 second connecting block. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The invention discloses a torque reversing device for a valve test bench, such as Figure 1 As shown, it includes a hydraulic motor 1, a driving gear box 19, a driving rod 10, a driven gear box 11 and a driven rod 15. The driving gear box 19 and the driven gear box 11 are respectively fixed to the front end and the rear end of the test bench 18.

[0020] like Figure 2 As shown, the hydraulic motor 1 is located at the front end of the test bench 18, and the output shaft of the hydraulic motor 1 is provided with an actuator rod 3. The hydraulic motor 1 drives the actuator rod 3 to move through the reducer 2. The lower part of the actuator rod 3 is provided with a driving gear 7 in the horizontal direction. The driving gear 7 is located in the driving gear box 19. The driving gear 7 is provided with four circumferential locating pins 4 along the circumferential direction. The driving gear 7 is fixedly connected to the actuator rod 3 through the circumferential locating pins 4. The lower end of the actuator rod 3 is provided with an axial locating pin 5. The axial locating pin 5 is rotatably connected to the locating seat at the bottom of the driving gear box 19. While ensuring the stable transmission of torque by the driving gear 7, it provides an upward lifting force for the driving gear box 19 to ensure the stability of the entire reversing device.

[0021] like Figure 3 As shown, the front and rear ends of the driving rod 10 extend into the driving gear box 19 and the driven gear box 11 respectively, the rear part of the driving rod 10 is sleeved with the first connecting block 24, and the first connecting block 24 is fixedly connected to the two rod bodies of the driving rod 10, and the rear part of the driven rod 15 is sleeved with the second connecting block 27, and the second connecting block 27 is fixedly connected to the two rod bodies of the driven rod 15. Rectangular grooves are provided at the connection of the rod bodies for circumferential positioning when the rod bodies rotate.

[0022] The front end of the driving rod 10 is sleeved with the first bearing 9, the first bearing 9 is located on the rear side of the second driven gear 8, the first bearing 9 is fixed to the rear side wall of the driving gear box 19, the front end of the driving rod 10 is vertically provided with a second driven gear 8, the second driven gear 8 is located in the driving gear box 19, and the rear side surface of the driving gear 7 is meshed with the upper end of the first driven gear 6 for transmission.

[0023] A first driven gear 6 is vertically arranged at the front of the driving gear box 19. The first driven gear 6 is installed in the driving gear box 19 through a locating pin. The front side surface of the driving gear 7 is meshed with the upper end of the first driven gear 6 for transmission. The first driven gear 6 serves as a stabilizing gear and does not directly participate in the driving, which is beneficial to the smooth transmission and reversing of torque.

[0024] A third driven gear 20 is disposed at the rear end of the driving rod 10 , and the third driven gear 20 is installed in the driven gear box 11 through a positioning pin.

[0025] The driven rod 15 is arranged parallel to the driving rod 10 in the front-to-back direction, and an execution plug 16 is arranged at the front end of the driven rod 15. Figure 3 As shown, the rear end of the driven rod 15 extends into the driven gear box 11, and a fourth driven gear 21 is provided at the rear end of the driven rod 15. The fourth driven gear 21 is installed in the driven gear box 11 through a locating pin, and the third driven gear 20 is transmission-connected with the fourth driven gear 21.

[0026] The driven gearbox 11 is installed on the mobile platform 25. The mobile platform 25 has the functions of lifting and lowering and horizontal movement. It can cooperate with the torque actuator of the valve test bench to move in six directions: front, back, left, right, up and down. The actuator plug 16 can be flexibly inserted into the actuator of the valve.

[0027] like Figure 2 and Figure 3 As shown, a first transmission gear 22 and a second transmission gear 23 are vertically provided in the driven gear box 11, and the first transmission gear 22 and the second transmission gear 23 are installed in the driven gear box 11 through positioning pins, and the side surface of the third driven gear 20 is meshed with the side surface of the first transmission gear 22 for transmission, the side surface of the first transmission gear 22 is meshed with the side surface of the second transmission gear 23 for transmission, and the side surface of the second transmission gear 23 is meshed with the side surface of the fourth driven gear 21 for transmission.

[0028] A support column 26 is vertically provided on the mobile platform 25, and the support column 26 fixes and supports the lower end of the driven gear box 11. The outer side of the second connecting block 27 is sleeved with the second bearing 14. A rod bracket 17 is provided on the front side of the support column 26. A semicircular ring is provided on the upper end of the rod bracket 17, and the ring carries the second bearing 14. The second bearing 14, the rod bracket 17 and the mobile platform 25 form a stable triangular structure, which is beneficial to the stable transmission of torque by the reversing device.

[0029] A dynamic torque sensor 13 and an angle sensor 12 are provided at the rear end of the driven rod 15, which can directly transmit data with the computer of the test bench 18 to monitor the torque, angle, and opening and closing circle number information of the valve life test in real time.

[0030] When working, the reversing device can be applied to valves with a drive device located on the side, such as a butterfly valve. When conducting an opening and closing life test, the valve is installed on a test bench, the execution plug 16 of the test bench 18 is removed, and the driving gear 7 is replaced. The driving gear 7 is circumferentially positioned by four circumferential positioning pins 4 and axially positioned by an axial positioning pin 5, and is connected to a first driven gear 6 and a second driven gear 8; Then, adjust the position of the reversing device, insert the actuator plug 16 at the end of the driven rod 15 into the valve's own actuator (handwheel), and connect the angle sensor 12 and the dynamic torque sensor 13 to the test bench 18; Finally, the test bench 18 is started, and the valve opening and closing life test and the functional torque test can be carried out according to the relevant test procedures.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A torque reversing device for a valve test bench, characterized in that: The invention comprises a hydraulic motor (1), a driving gear box (19), a driving rod (10), a driven gear box (11) and a driven rod (15), wherein the driving gear box (19) and the driven gear box (11) are respectively fixed to the front end and the rear end of a test bench (18), the hydraulic motor (1) is located at the front end of the test bench (18), the output shaft of the hydraulic motor (1) is provided with an actuator rod (3), the hydraulic motor (1) drives the actuator rod (3) to move via a reducer (2), and the actuator rod (3) A driving gear (7) is provided in the lower part thereof in the horizontal direction, and the driving gear (7) is located in the driving gear box (19). The front and rear ends of the driving rod (10) extend into the driving gear box (19) and the driven gear box (11) respectively. A second driven gear (8) is provided in the vertical direction at the front end of the driving rod (10). The second driven gear (8) is located in the driving gear box (19). The side surface of the driving gear (7) meshes with the upper end of the second driven gear (8) for transmission. The driving rod (10) A third driven gear (20) is provided at the rear end of the driven rod (15), the third driven gear (20) being mounted in the driven gear box (11) via a positioning pin; the driven rod (15) is arranged parallel to the driving rod (10) in the front-to-back direction; an actuating plug (16) is provided at the front end of the driven rod (15); the rear end of the driven rod (15) extends into the driven gear box (11); a fourth driven gear (21) is provided at the rear end of the driven rod (15), the fourth driven gear (21) being mounted in the driven gear box (11) via a positioning pin. In the driven gear box (11), the third driven gear (20) is transmission-connected with the fourth driven gear (21); the driven gear box (11) is mounted on a mobile platform (25); the mobile platform (25) can move in six directions, namely, front, rear, left, right, up, and down; a dynamic torque sensor (13) and an angle sensor (12) are provided at the rear end of the driven rod (15); the dynamic torque sensor (13) and the angle sensor (12) are communication-connected with a computer of the test bench (18).

2. The torque reversing device for a valve test bench according to claim 1, characterized in that: The driving gear (7) is provided with four circumferential positioning pins (4) along the circumferential direction, and the driving gear (7) is fixedly connected to the actuator rod (3) via the circumferential positioning pins (4).

3. The torque reversing device of the valve test bench according to claim 1, characterized in that: An axial positioning pin (5) is provided at the lower end of the actuator rod (3), and the axial positioning pin (5) is rotatably connected to a positioning seat at the bottom of the driving gear box (19).

4. The torque reversing device for a valve test bench according to claim 1, characterized in that: A first driven gear (6) is provided at the front of the driving gear box (19); the first driven gear (6) is installed in the driving gear box (19) via a positioning pin; and the side surface of the driving gear (7) meshes with the upper end of the first driven gear (6) for transmission.

5. The torque reversing device for a valve test bench according to claim 1, characterized in that: A first transmission gear (22) and a second transmission gear (23) are vertically arranged in the driven gear box (11); the first transmission gear (22) and the second transmission gear (23) are mounted in the driven gear box (11) via positioning pins; the side surface of the third driven gear (20) meshes with the side surface of the first transmission gear (22) for transmission; the side surface of the first transmission gear (22) meshes with the side surface of the second transmission gear (23) for transmission; and the side surface of the second transmission gear (23) meshes with the side surface of the fourth driven gear (21) for transmission.

6. The torque reversing device for a valve test bench according to claim 1, characterized in that: The front end of the driving rod (10) is sleeved with a first bearing (9), the first bearing (9) is located on the rear side of the second driven gear (8), and the first bearing (9) is fixed to the rear side wall of the driving gear box (19).

7. The torque reversing device for a valve test bench according to claim 1, characterized in that: A first connecting block (24) is provided in the middle of the driving rod (10), and the first connecting block (24) is fixedly connected to two rod bodies of the driving rod (10).

8. The torque reversing device for a valve test bench according to claim 1, characterized in that: A support column (26) is vertically provided on the upper edge of the mobile platform (25), and the support column (26) fixedly supports the lower end of the driven gear box (11).

9. The torque reversing device of the valve test bench according to claim 8, characterized in that: A second connecting block (27) is provided in the middle of the driven rod (15), and the second connecting block (27) is fixedly connected to two rod bodies of the driven rod (15).

10. The torque reversing device of the valve test bench according to claim 9, characterized in that: The outer side of the second connection block (27) is sleeved with the second bearing (14), the front side of the support column (26) is provided with a rod bracket (17), the upper end of the rod bracket (17) is provided with a semicircular arc-shaped collar, and the collar carries the second bearing (14).

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