Tension testing device for box cover of electric meter box

Abstract

The utility model relates to a tension testing device for a box cover of an electric meter box, and belongs to the technical field of electric meter box detection equipment. The tension testing device for the box cover of the electric meter box comprises a fixed hanging bracket, a clamping bracket, a supporting shaft, a hanging ring and a counter weight, the middle part of the supporting shaft is connected with a lifting ring; the two ends of the supporting shaft are rotationally connected with fixed hanging brackets correspondingly. A clamping frame is arranged below the fixed hanging bracket; the fixed hanging bracket comprises a swing rod and a pressing block; one end of the supporting shaft is provided with two sets of swing rods in a crossed rotating mode through bearings. The lower end of the oscillating rod is in threaded connection with an adjusting screw; and one end of the adjusting screw rod is fixedly connected with a pressing block. The tension testing device for the box cover of the electric meter box is compact in structure and ingenious in design, can meet the requirements of detection and use of box covers of various types of electric meter boxes, and meets the requirements of tension testing of the box covers.

Description

Technical Field

[0001] The utility model relates to a tension testing device for an electric meter box cover, belonging to the technical field of electric meter box detection equipment. Background Art

[0002] Electricity meter boxes are commonly used for electricity metering. Once their lids are closed and locked, they are difficult to open without a key. Currently, meter boxes are vandalized by prying open the hinged joint between the lid and the box. To address this issue, existing meter boxes have reinforced joints. To verify the effectiveness of these reinforcements, a test device was developed to verify the strength of the connection between the lid and the box. Summary of the Invention

[0003] The purpose of the utility model is to provide a device with compact structure and ingenious design to achieve the purpose of detecting the pulling force between the meter box and the box cover.

[0004] The technical solution of the utility model is:

[0005] A tensile testing device for an electric meter box cover comprises a fixed hanger, a clamping frame, a support shaft, a lifting ring and a counterweight; the device is characterized in that: a lifting ring is connected to the middle of the support shaft; both ends of the support shaft are rotatably connected to the fixed hanger; a clamping frame is provided below the fixed hanger; the fixed hanger comprises a swing rod and a clamping block; one end of the support shaft is provided with two sets of swing rods which are cross-rotatably mounted through bearings; the lower end of the swing rod is threadedly connected to an adjusting screw; one end of the adjusting screw is fixedly connected to the clamping block.

[0006] A limit plate is fixed on the upper end of the swing rod at one end of the support shaft; a limit screw is installed between the limit plates of adjacent support shafts; and a limit nut is connected to the limit screw outside the limit plate.

[0007] The lower end of the swing rod is provided with a vertical part; the vertical part is threadedly connected with an adjusting screw.

[0008] The clamping frame includes a clamping plate, a locking nut, an assembly rod and a pull ring; the pull ring is fixedly installed in the middle of the assembly rod; clamping plates are movably installed on the assembly rods on both sides of the pull ring; and locking nuts are threadedly connected to the assembly rods on both sides of the clamping plate.

[0009] The upper end of the clamping plate is provided with a clamping claw.

[0010] The advantages of the present invention are:

[0011] The tensile testing device for the meter box cover has a compact structure and an ingenious design, can adapt to the needs of detecting and using the covers of various types of meter boxes, and meets the demand for tensile testing of the cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 This is a structural diagram of the fixed hanger of the utility model;

[0014] Figure 3 This is a structural diagram of the card holder of the utility model;

[0015] Figure 4 This is a schematic diagram of the main structure of the card holder of the utility model;

[0016] Figure 5 This is a structural diagram of the fixed hanger of the utility model;

[0017] Figure 6 This is a schematic diagram of the working state structure of the utility model.

[0018] In the figure: 1. Support shaft; 2. Lifting ring; 3. Fixed hanger; 4. Clamping frame; 5. Swing rod; 6. Clamping block; 7. Adjusting screw; 8. Limit plate; 9. Limit screw; 10. Limit nut; 11. Vertical part; 12. Assembly rod; 13. Pull ring; 14. Clamping plate; 15. Locking nut; 16. Claw; 17. Counterweight; 18. Meter box; 19. Box cover. DETAILED DESCRIPTION

[0019] The tensile testing device for the cover of the electric meter box includes a fixed hanger 3, a clamping frame 4, a support shaft 1, a lifting ring 2 and a counterweight 17 (see the appendix of the manual). Figure 1 and 6 ).

[0020] The middle of the support shaft 1 is connected to a lifting ring 2; both ends of the support shaft 1 are rotatably connected to fixed hangers 3 (see the attached manual). Figure 1 ).

[0021] The fixed hanger 3 includes a swing rod 5 and a pressing block 6 (see the appendix of the manual). Figure 2 and 5 One end of the support shaft 1 is cross-rotated with two sets of swing rods 5 through bearings. The swing rods 5 can rotate freely around the support shaft 1 when subjected to force.

[0022] The lower end of the swing rod 5 is provided with a vertical portion 11; the vertical portion 11 is threadedly connected to the adjusting screw 7 (see the attached manual Figure 2 and 5 One end of the adjusting screw 7 is fixedly connected to the pressing block 6 (see the appendix of the instruction manual). Figure 2 and 5The purpose of setting the adjusting screw 7 is to adjust the lateral position of the pressing block 6 by rotating the adjusting screw 7 during operation, so as to make the tensile testing device of the meter box cover suitable for testing various types of meter boxes.

[0023] The upper end of the swing rod 5 at one end of the support shaft 1 is fixed with a limit plate 8; the limit screws 9 are installed between the limit plates 8 of adjacent support shafts 1; the limit screws 9 on the outer side of the limit plate 8 are connected with the limit nut 10 (see the appendix of the manual) Figure 2 and 5 ).

[0024] There is a large gap between the limit screw 9 and the limit plate 8. The purpose of this setting is to ensure that when the swing arm 5 drives the limit plate 8 to rotate, there is a certain gap between the limit plate 8 and the limit screw 9, so that the swing arm 5 can swing within a certain range, avoiding the problem of "interference" between the swing arm 5 and the limit screw 9.

[0025] The purpose of providing the limit nut 10 is to enable the position of the limit nut 10 on the limit screw 9 to be adjusted during operation by rotating the limit nut 10. In this way, when the swing arm 5 rotates to the point where it contacts the limit nut 10, the limit nut 10 will prevent the swing arm 5 from rotating further, thereby achieving the purpose of limiting the swing angle of the swing arm 5.

[0026] A clamping frame 4 is provided below the fixed hanger 3 (see the appendix of the manual). Figure 1 The holder 4 includes a card plate 14, a locking nut 15, an assembly rod 12 and a pull ring 13 (see the appendix of the manual). Figure 1 and 4 ).

[0027] A pull ring 13 is fixedly mounted on the middle of the assembly rod 12; a clamping plate 14 is movably mounted on the assembly rod 12 on both sides of the pull ring 13; a clamping claw 16 is provided on the upper end of the clamping plate 14 (see the appendix of the manual). Figure 4 ).

[0028] The assembly rods 12 on both sides of the card plate 14 are threadedly connected with lock nuts 15. The purpose of providing the lock nuts 15 is to make it possible to fix the card plate 14 on the assembly rods 12 when the lock nuts 15 are tightened during work, and to adjust the position of the card plate 14 on the assembly rods 12 when the lock nuts 15 are loosened.

[0029] To operate this meter box cover tensile testing device, the meter box is first placed between the compression blocks 6 of the fixed hanger 3. The fixed hanger 3 is then lifted using a lifting device (such as a forklift or overhead crane), the lifting ring 2, and the support shaft 1. As the support shaft 1 moves upward, the swing arms 5 of the fixed hanger 3 move toward each other under the influence of gravity, tightening the meter box under test and driving the meter box upward.

[0030] When the meter box moves up to a certain height, the fixed hanger 3 stops moving. Then adjust the clamping frame 4 so that the claw 16 on the clamping plate 14 is inserted into the gap between the meter box 18 and the box cover 19 (see the appendix of the manual). Figure 6 ).

[0031] After the above work is completed, the counterweight 17 is gradually installed on the pull ring 13. During this process, as the weight of the counterweight 17 continues to increase, observe the changes in the gap between the meter box 18 and the box cover 19. When the gap exceeds a certain limit value or the meter box 18 is damaged, the weight of the counterweight 17 is the limit value of the tension that the meter box can withstand. At this point, the tensile test device has completed the tensile test of the meter box cover, and the tensile test device can enter the next working cycle.

[0032] The tensile testing device for the meter box cover has a compact structure and an ingenious design, can adapt to the needs of detecting and using the covers of various types of meter boxes, and meets the demand for tensile testing of the cover.

Claims

1. A tensile testing device for an electric meter box cover, comprising a fixed hanger (3), a clamping frame (4), a support shaft (1), a lifting ring (2) and a counterweight (17); characterized in that: The middle part of the support shaft (1) is connected with a lifting ring (2); the two ends of the support shaft (1) are respectively rotatably connected with fixed hangers (3); a clamping frame (4) is provided below the fixed hanger (3); the fixed hanger (3) includes a swing rod (5) and a pressing block (6); one end of the support shaft (1) is equipped with two sets of swing rods (5) for cross-rotation through bearings; the lower end of the swing rod (5) is threadedly connected with an adjusting screw (7); one end of the adjusting screw (7) is fixedly connected with a pressing block (6).

2. The tensile testing device for an electric meter box cover according to claim 1, characterized in that: A limit plate (8) is fixedly mounted on the upper end of the swing rod (5) at one end of the support shaft (1); a limit screw (9) is installed through the limit plates (8) of adjacent support shafts (1); and a limit nut (10) is connected to the limit screw (9) outside the limit plate (8).

3. The tensile testing device for an electric meter box cover according to claim 1, characterized in that: The lower end of the swing rod (5) is provided with a vertical portion (11); an adjusting screw (7) is threadedly connected to the vertical portion (11).

4. The tensile testing device for an electric meter box cover according to claim 1, characterized in that: The clamping frame (4) comprises a clamping plate (14), a locking nut (15), an assembly rod (12) and a pull ring (13); the pull ring (13) is fixedly mounted in the middle of the assembly rod (12); clamping plates (14) are movably mounted on the assembly rod (12) on both sides of the pull ring (13); and locking nuts (15) are threadedly connected to the assembly rod (12) on both sides of the clamping plate (14).

5. The tensile testing device for an electric meter box cover according to claim 4, characterized in that: A clamping claw (16) is provided at the upper end of the clamping plate (14).

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