Torsion testing machine of metering box

Abstract

A torsion testing machine of a metering box belongs to the technical field of metering box testing. Which comprises a case (14) and is characterized in that the upper surface of the case (14) is provided with a fixing and clamping assembly used for fixing the bottom of the metering box, the upper portion of the case (14) is provided with a lifting frame (3) in a liftable mode, a torque arm (6) is arranged below the lifting frame (3), and the two ends of the torque arm (6) are provided with measuring and clamping assemblies used for clamping the top of the metering box. And the upper part of the lifting frame (3) is also provided with a driving mechanism which is used for driving the torsion arm (6) to rotate and applying torsion to the metering box. In the torsion testing machine of the metering box, the bottom of the metering box is fixed through the fixed clamping assembly, and the top of the metering box is clamped and torsion is applied through the measurement clamping assembly, so that the torsion test of the metering box is realized. The lifting hand wheel simultaneously achieves synchronous lifting of the lifting rods at the four corners through the lifting wheel shaft, the main transmission shaft, the auxiliary transmission shaft and the reverser.

Description

Technical Field

[0001] A torsion testing machine for a metering box belongs to the technical field of metering box testing. Background Art

[0002] A metering box is the overall of metering instruments and auxiliary equipment necessary for metering electric energy, including electric energy meters, metering voltage and current transformers and their secondary circuits, electric energy metering panels, cabinets, boxes, etc. Since the metering box may be in a relatively harsh working environment for a long time, high requirements are imposed on the performance of the metering box. Among them, the torsion that the metering box body can withstand is an important test item. The test method and test parameters for the torsion test of the metering box body are recorded in the national standard document GB 7251.5-2008.

[0003] In the prior art, there are also some technical solutions that can perform torsion tests on metering boxes. For example, the technical solution disclosed in the Chinese invention patent application with the application number 201811286900.1, the application date of October 31, 2018, and the patent name of "Metering Box Mechanical Static Load Test Device"; the application number 202110912676.8, the application date of August 10, 2021, and the patent name of "Metering Box Shell Mechanical Performance Testing Machine" The technical solution disclosed in the Chinese invention patent application; the technical solution disclosed in the Chinese utility model patent with the application number 202223058767.9, the application date of November 17, 2022, and the patent name of "A Torsion Testing Machine", etc.

[0004] However, the applicant of the present application also hopes to design a technical solution with a new structure that can perform torsion tests on the body of the metering box. Utility Model Content

[0005] The technical problem to be solved by the present utility model is: to overcome the deficiencies of the prior art and provide a torsion testing machine for a metering box that fixes the bottom of the metering box through a fixed clamping component and clamps and applies torsion to the top of the metering box through a measuring clamping component, thereby realizing the torsion test of the metering box.

[0006] The torsion testing machine for the metering box includes a machine case, and is characterized in that: a fixed clamping component for fixing the bottom of the metering box is arranged on the upper surface of the machine case, a lifting frame is arranged on the upper part of the machine case in a liftable manner, a torsion arm is arranged below the lifting frame, measuring clamping components for clamping the top of the metering box are arranged at both ends of the torsion arm, and a driving mechanism for driving the torsion arm to rotate and applying torsion to the metering box is also arranged on the upper part of the lifting frame.

[0007] Preferably, a plurality of lift rods that can be lifted are provided at the edge of the chassis. The lift frame is horizontally fixed at the top of all the lift rods. The driving mechanism is a driving motor installed on the upper part of the lift rods. The driving motor is fixed to the torsion arm through a torsion rotating shaft passing through the lift frame.

[0008] Preferably, the measurement clamping assembly includes sliders provided at both ends of the torsion arm. The two sliders are slidably installed in the torsion arm. A torsion sensor is respectively fixed at each slider. One end of the torsion sensor is fixed to the corresponding slider, and the other end is fixed to a clamping member for clamping the metering box.

[0009] Preferably, a test handwheel is provided at one end of the torsion arm. A rotating shaft coaxially fixed to the test handwheel passes through the torsion arm. Two sections of threads with opposite directions provided at both ends of the shaft are respectively threadedly connected to the two sliders.

[0010] Preferably, the fixed clamping assembly includes two first clamping plates arranged oppositely and two second clamping plates arranged oppositely. The first handwheel drives the two first clamping plates to move relatively. The second handwheel drives the two second clamping plates to move relatively. The movement tracks of the first clamping plates and the movement tracks of the second clamping plates are perpendicular.

[0011] Preferably, a set of first guide blocks are oppositely arranged on the surface of the chassis, and a set of second guide blocks are oppositely arranged. The two first clamping plates are respectively clamped in the corresponding first guide blocks, and the two second clamping plates are respectively clamped in the corresponding second guide blocks;

[0012] Preferably, the first wheel shaft coaxially fixed to the first handwheel is located above the upper surface of the chassis. Two sections of threads with opposite directions provided at both ends of the first wheel shaft are respectively threadedly connected to the two first clamping plates; the second wheel shaft coaxially fixed to the second handwheel is located below the upper surface of the chassis. Fixing plates respectively connected to the two second clamping plates are provided at the lower part of the chassis. Two sections of threads with opposite directions provided at both ends of the second wheel shaft are respectively threadedly connected to the two fixing plates.

[0013] Preferably, a screw lift is respectively provided at the four corners inside the chassis. A lift rod is respectively led out from each screw lift. A lift handwheel for simultaneously driving the screw lifts at the four corners to rotate is provided at the side of the chassis.

[0014] Preferably, the lift wheel shaft coaxially fixed to the lift handwheel is connected to the input end of the main commutator. Two main transmission shafts led out from the output shafts on both sides of the main commutator are respectively connected to the input ends of a sub-commutator. Two sub-transmission shafts led out from both sides of the sub-commutator are respectively connected to the two screw lifts on the same side.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] In the torsion testing machine of this metering box, the bottom of the metering box is fixed by the fixed clamping assembly, and the top of the metering box is clamped and a torsion force is applied through the measuring clamping assembly, realizing the torsion test of the metering box.

[0017] In the torsion testing machine of this metering box, by rotating the first handwheel and the second handwheel, the bottom of the metering box can be clamped by the first clamping plate and the second clamping plate respectively.

[0018] In the torsion testing machine of this metering box, the lifting handwheel realizes the synchronous lifting of the lifting rods at the four corners through the lifting wheel shaft, the main transmission shaft, the auxiliary transmission shaft and the commutator. Description of the Drawings

[0019] Figure 1 Is an axonometric view of the torsion testing machine of the metering box.

[0020] Figure 2 Is a front view of the torsion testing machine of the metering box.

[0021] Figure 3 Is Figure 2 The right view of.

[0022] Figure 4 Is Figure 2 The sectional view taken along the line A-A in.

[0023] Figure 5 Is Figure 2 The sectional view taken along the line B-B in.

[0024] Figure 6 Is Figure 2 The sectional view taken along the line C-C in.

[0025] Wherein: 1. Clamping member 2. Driving motor 3. Lifting frame 4. Second guide block 5. Second clamping plate 6. Torsion arm 7. Testing handwheel 8. Lifting rod 9. Torsion sensor 10. Console 11. First clamping plate 12. First handwheel 13. First guide block 14. Chassis 15. Second handwheel 16. Lifting handwheel 17. Torsion rotating shaft 18. Guide groove 19. Upper guide rail 20. First wheel shaft 21. Main frame 22. Lower guide rail 23. Second wheel shaft 24. Fixed plate 25. Auxiliary commutator 26. Auxiliary transmission shaft 27. Main commutator 28. Screw elevator 29. Lifting wheel shaft 30. Main transmission shaft. Detailed Implementation Manner

[0026] Figures 1 to 6 Is the best embodiment of the present utility model. The following further describes the present utility model in conjunction with the attached Figures 1 to 6 Drawings.

[0027] Such as Figures 1 to 2As shown in the figure, a torsion testing machine for a metering box (hereinafter referred to as the torsion testing machine) includes a chassis 14. At the four corners of the upper surface of the chassis 14, a lifting rod 8 is vertically arranged respectively, and each lifting rod 8 is arranged on the surface of the chassis 14 in a liftable manner. At the top of the four lifting rods 8, a lifting frame 3 is fixed. Below the lifting frame 3, a torsion arm 6 is arranged.

[0028] On the upper surface of the chassis 14, two groups of clamping plates are also arranged oppositely: two first clamping plates 11 arranged oppositely, and two second clamping plates 5 arranged oppositely. The lifting frame 3 rises under the drive of the lifting rods 8 to reserve a placement space for the metering box, and then the metering box to be tested (not shown in the figure) is placed on the upper surface of the chassis 14. The two first clamping plates 11 and the two second clamping plates 5 respectively fix the bottom of the metering box around. The lifting frame 3 descends under the drive of the lifting rods 8, and the two ends of the torsion arm 6 fix the diagonal corners of the metering box. Then the drive motor 2 works, and a preset torsion is applied to the metering box through the torsion arm 6, and then the state of the metering box is further judged.

[0029] On two adjacent end faces of the chassis 14, a first handwheel 12 and a second handwheel 15 are respectively arranged. The approach or separation of the two first clamping plates 11 is controlled by the first handwheel 12, and the approach or separation of the two second clamping plates 5 is controlled by the second handwheel 15. At the lower part of the second handwheel 15, a lifting handwheel 16 is arranged. By rotating the lifting handwheel 16, the rise or fall of the four lifting rods 8 is controlled, so as to realize the lifting control of the lifting frame 3.

[0030] At the end face on the same side as the first handwheel 12, a control console 10 is arranged. In the control console 10, a controller, control buttons and a display screen of this torsion testing machine are arranged. The action of this torsion testing machine is controlled by the controller in the control console 10, and the corresponding test values are displayed.

[0031] Combined Figure 3 , the lifting frame 3 is horizontally arranged. A drive motor 2 is arranged in the middle of the lifting frame 3. The motor shaft of the drive motor 2 is coaxially fixed with a torsion rotating shaft 17. The torsion rotating shaft 17 passes through the lifting frame 3 downward and then is connected with the torsion arm 6. A test handwheel 7 is arranged at one end of the torsion arm 6. The torsion arm 6 is a hollow structure with an open lower end. Two sliders are slidably arranged in the torsion arm 6. At the lower part of each slider, a torsion sensor 9 is respectively fixed. One ends of the two torsion sensors 9 are respectively fixed with the corresponding sliders, and the other ends of the two torsion sensors 9 are respectively fixed with clamping members 1. The torsion sensor 9 is realized by a commercially available cantilever beam weighing sensor with a common model of DYX-306. The signal output ends of the two torsion sensors 9 are respectively connected with the controller in the control console 10.

[0032] On both sides of the axle of the test handwheel 7, threads with opposite directions are respectively provided. The two threads respectively pass through two sliders and are in threaded connection. When the test handwheel 7 is rotated, the two sliders approach or separate along the torsion arm 6, thereby realizing the approach or separation of the two torque sensors 9. The clamping members 1 fixed to the two torque sensors 9 are preferably made of angle steel. When the two torque sensors 9 are made to approach by the test handwheel 7, the two clamping members 1 approach synchronously. After the two clamping members 1 approach the metering box to be measured, the two clamping members 1 are respectively stuck on the outer sides of the diagonals of the metering box body. After the two clamping members 1 are clamped with the metering box, a torque is applied to the torsion arm 6 by the drive motor 2, and further a torque is applied to the metering box by the two clamping members 1. During the process of applying the torque, the torque value is measured by the torque sensor 9.

[0033] As Figure 4 shown, a set of first guide blocks 13 are oppositely arranged on the upper surface of the chassis 14. Two upper guide rails 19 are respectively arranged in each first guide block 13. The two first clamping plates 11 are respectively clamped in the corresponding first guide blocks 13, and each first clamping plate 11 is respectively slidably connected to the upper guide rails 19 in the corresponding first guide block 13. The first axle 20 coaxially fixed with the first handwheel 12 passes through the two first guide blocks 13 at the same time. Two threads with opposite directions are respectively provided on both sides of the first axle 20. The two threads are respectively in threaded connection with the two first guide blocks 13. When the first handwheel 12 is rotated, the two first clamping plates 11 are driven to approach or separate.

[0034] Combined with Figure 5 , a set of second guide blocks 4 are also oppositely arranged on the upper surface of the chassis 14. The two second clamping plates 5 are respectively clamped in the corresponding second guide blocks 4. Two sets of guide grooves 18 are provided on the upper surface of the chassis 14. All the guide grooves 18 are through grooves penetrating the upper surface of the chassis 14. Each set of guide grooves 18 respectively includes two, and the two guide grooves 18 in each set are symmetrically arranged on the moving tracks of the corresponding second clamping plates 5.

[0035] On the bottom of the upper surface of the chassis 14, a fixing plate 24 is respectively provided. Two connecting rods are symmetrically arranged on the surface of each fixing plate 24. The two connecting rods on the surface of each fixing plate 24 pass through the corresponding two guide grooves 18 and extend to the upper part of the chassis 14 and are connected to the corresponding second clamping plates 5.

[0036] At the bottom of the upper surface of the chassis 14, there are also two sets of lower guide rails 22. The two lower guide rails 22 in each set are symmetrically arranged inside the corresponding two guide grooves 18, and the fixing plates 24 on the corresponding side are slidably connected to the two guide grooves 18 on the same side. The second wheel shaft 23 fixed coaxially with the second handwheel 15 passes through the two fixing plates 24 at the same time. On both sides of the second wheel shaft 23, there are two sections of threads with opposite directions. The two sections of threads are respectively threadedly connected to the two fixing plates 24. When the second handwheel 15 is rotated, the two fixing plates 24 are driven to approach or separate, thereby further driving the two second clamping plates 5 on the upper surface of the chassis 14 to approach or separate.

[0037] Further combined with Figure 6 , the chassis 14 includes a main frame 21 and guard plates arranged around and on the top of the main frame 21. At the center of the main frame 21, there is a main commutator 27. The lifting wheel shaft 29 fixed coaxially with the lifting handwheel 16 is connected to the input shaft of the main commutator 27. At the output shafts on both sides of the main commutator 27, there is a main transmission shaft 30 fixed coaxially respectively. The two main transmission shafts 30 on both sides extend to the two side edges of the main frame 21 respectively.

[0038] At the two side edges of the main frame 21, there is a sub-commutator 25 respectively. The two main transmission shafts 30 are fixed coaxially with the input shafts of the sub-commutators 25 on the corresponding sides respectively. At the four corners of the main frame 21, there is also a screw lift 28 respectively. The above four lifting rods 8 are respectively led out from the screw lifts 28 at the four corners. At the output shafts on both sides of each sub-commutator 25, there is a sub-transmission shaft 26 fixed coaxially respectively. The other ends of the sub-transmission shafts 26 led out from both sides of each sub-commutator 25 are respectively connected to the input shafts of the two screw lifts 28 on the same side. When the lifting handwheel 16 is rotated, the torque of the lifting handwheel 16 is transmitted to the main commutator 27 through the lifting wheel shaft 29, and further transmitted to the two sub-commutators 25 through the two main transmission shafts 30 led out from both sides of the main commutator 27. Further, the screw lifts 28 at the four corners are driven to rotate through the two sub-commutators 25 and the four sub-transmission shafts 26, so as to realize the synchronous rising or falling of the four lifting rods 8 on the upper surface of the chassis 14.

[0039] The specific working process and working principle are as follows:

[0040] Rotate the lifting handwheel 16 in the forward direction. Through the lifting wheel shaft 29, the main commutator 27, two main transmission shafts 30, two sub - commutators 25, and four sub - transmission shafts 26, drive the screw lifters 28 at the four corners to work. At the same time, raise the four lifting rods 8, drive the lifting frame 3 to rise, and reserve a space for placing the metering box between the upper surface of the lifting frame 3 and the chassis 14. Rotate the first handwheel 12 in the forward direction to separate the two first clamping plates 11, and rotate the second handwheel 15 in the forward direction to separate the two second clamping plates 5, leaving a space at the upper surface of the chassis 14 for accommodating the bottom of the metering box. Rotate the test handwheel 7 in the forward direction to move the two clamping members 1 to the ends of the torsion arm 6.

[0041] Place the metering box to be tested on the upper surface of the chassis 14, and respectively rotate the first handwheel 12 and the second handwheel 15 in the reverse direction. Through the two first clamping plates 11 and the two second clamping plates 5, clamp the metering box from all around. Then rotate the lifting handwheel 16 in the reverse direction to lower the lifting frame 3. When the torsion arm 6 below the lifting frame 3 descends to the upper surface of the metering box, stop rotating the lifting handwheel 16. Then rotate the test handwheel 7 in the reverse direction to move the two clamping members 1 closer and clamp at the diagonal corners of the metering box body.

[0042] Control the driving motor 2 to rotate through the console 10. When the driving motor 2 rotates, the torque output by its motor shaft is applied to the upper end of the metering box through the torsion rotating shaft 17, the torsion arm 6, and the clamping members 1 at both ends. The torsion sensor 9 measures the applied torsion when the torsion arm 6 rotates. When the applied torsion reaches a predetermined value, the controller controls the driving motor 2 to stop rotating further and maintains the current torsion. According to the test requirements, after the predetermined torsion is applied for a predetermined time, the driving motor 2 stops applying torsion to the metering box further. Then, evaluate the performance of the metering box according to the test requirements.

[0043] The above is only the preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change, and modification made to the above - mentioned embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A torque testing machine for a metering box, comprising a box (14), characterized in that: A fixing clamping assembly for fixing the bottom of the metering box is arranged on the upper surface of the chassis (14); a lifting frame (3) is arranged on the upper part of the chassis (14) so ​​as to be liftable; a torque arm (6) is arranged below the lifting frame (3); measuring clamping assemblies for clamping the top of the metering box are arranged at both ends of the torque arm (6); and a driving mechanism for driving the torque arm (6) to rotate and apply torque to the metering box is also arranged on the upper part of the lifting frame (3).

2. The torque testing machine for the metering box according to claim 1, characterized in that: A plurality of liftable lifting rods (8) are arranged at the edge of the chassis (14); the lifting frame (3) is horizontally fixed on the top of all the lifting rods (8); the driving mechanism is a driving motor (2) installed on the upper part of the lifting rods (8); the driving motor (2) is fixed to the torque arm (6) via a torque shaft (17) that passes through the lifting frame (3).

3. The torque testing machine for the metering box according to claim 1 or 2, characterized in that: The measuring clamping assembly comprises sliders arranged at both ends of a torque arm (6), the two sliders being slidably mounted in the torque arm (6), a torque sensor (9) being fixed to each slider, one end of the torque sensor (9) being fixed to the corresponding slider, and the other end being fixed to a clamping member (1) for clamping a metering box.

4. The torque testing machine for the metering box according to claim 3, characterized in that: A test hand wheel (7) is arranged at one end of the torque arm (6), a rotating shaft coaxially fixed with the test hand wheel (7) passes through the torque arm (6), and two sections of threads in opposite directions provided at both ends of the wheel shaft are respectively threadedly connected to the two sliders.

5. The torque testing machine for a metering box according to claim 1, characterized in that: The fixed clamping assembly comprises two first clamping plates (11) arranged opposite to each other and two second clamping plates (5) arranged opposite to each other, the first hand wheel (12) drives the two first clamping plates (11) to move relative to each other, and the second hand wheel (15) drives the two second clamping plates (5) to move relative to each other, and the movement track of the first clamping plates (11) and the movement track of the second clamping plates (5) are perpendicular.

6. The torque testing machine for the metering box according to claim 5, characterized in that: A group of first guide blocks (13) and a group of second guide blocks (4) are arranged opposite to each other on the surface of the chassis (14); the two first clamping plates (11) are respectively clamped in the corresponding first guide blocks (13); and the two second clamping plates (5) are respectively clamped in the corresponding second guide blocks (4).

7. The torque testing machine for the metering box according to claim 5 or 6, characterized in that: A first wheel shaft (20) coaxially fixed with the first hand wheel (12) is located at the upper part of the upper surface of the chassis (14), and two threads in opposite directions provided at both ends of the first wheel shaft (20) are respectively threadedly connected to the two first clamping plates (11); a second wheel shaft (23) coaxially fixed with the second hand wheel (15) is located at the lower part of the upper surface of the chassis (14), and a fixing plate (24) connected to the two second clamping plates (5) is provided at the lower part of the chassis (14), and two threads in opposite directions provided at both ends of the second wheel shaft (23) are respectively threadedly connected to the two fixing plates (24).

8. The torque testing machine for a metering box according to claim 1, characterized in that: A spiral elevator (28) is provided at each of the four corners of the chassis (14), a lifting rod (8) is led out from each of the spiral elevators (28), and a lifting hand wheel (16) is provided on the side of the chassis (14) for driving the spiral elevators (28) at the four corners to rotate at the same time.

9. The torque testing machine for a metering box according to claim 8, characterized in that: A lifting wheel shaft (29) coaxially fixed with the lifting hand wheel (16) is connected to the input end of the main commutator (27), two main transmission shafts (30) led from the output shafts on both sides of the main commutator (27) are respectively connected to the input end of an auxiliary commutator (25), and two auxiliary transmission shafts (26) led from both sides of the auxiliary commutator (25) are respectively connected to two screw elevators (28) on the same side.

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