A current transformer for an electricity meter

Abstract

The utility model relates to the technical field of electric energy meter, specifically is a kind of electric energy meter shunt, including shunt main part, the bottom bolt connection of shunt main part has the bottom plate of shunt main part support, the fixed block is fixed with screw in the end of bottom plate;After the detection of the to-be-measured circuit ends, ammeter and to-be-measured circuit are separated from shunt main part, the support block in the fixed groove of protection plate is pressed, spring A in the side of support block is compressed, then support block enters the inside of bottom plate, then protection plate is slid outside bottom plate, then the limiting block symmetrically installed outside protection plate is pressed, then spring B in the side of limiting block is compressed, then the end of protection plate is pushed into the connecting groove opened in fixed block, then spring B drives limiting block to pop out outward, so that limiting block enters the limiting hole opened in fixed block, protection plate is fixed in shunt main part outside, to facilitate the protection of shunt main part.

Description

Technical Field

[0001] This utility model relates to the field of electricity meter technology, and specifically to an electricity meter shunt. Background Technology

[0002] An electricity meter is an instrument used to measure electrical energy. It is also called an electricity meter, watt-hour meter, or kilowatt-hour meter. It refers to an instrument that measures various electrical quantities. The electricity meter calculates the electrical energy used by the user by measuring these electrical quantities. It is usually measured in kilowatt-hours (kWh). Under high voltage or high current conditions, the electricity meter cannot be directly connected to the line and must be used in conjunction with a voltage transformer or current transformer.

[0003] Patent No. 202020130843.4 discloses a shunt for a smart energy meter. This device improves the assembly efficiency of the shunt and the energy meter, enhances the overcurrent capacity of the shunt, and improves the self-monitoring capability and resistance to external power frequency magnetic field interference of the energy meter.

[0004] However, when using existing electricity meter shunts, the electricity meter and the circuit under test are connected to the shunt separately to achieve the purpose of testing the circuit under test. However, after the test is completed, the shunt is always exposed to the external environment. Foreign objects in the external environment will adhere to the surface of the shunt and the bolts of the fixing line on the shunt, causing corrosion of the shunt and the bolts of the fixing line, which will have a certain impact on the accuracy of subsequent tests. Therefore, an electricity meter shunt is designed. Utility Model Content

[0005] In view of the problems in the background art, this utility model provides an electricity meter shunt.

[0006] The technical solution adopted by this utility model to solve its technical problem is an electricity meter shunt, including a shunt body. The bottom of the shunt body is bolted to a base plate that supports the shunt body. A fixing block is screwed to the end of the base plate, and a connecting groove is opened on the inner side of the fixing block. Limiting holes are symmetrically opened on the surface of the fixing block. A protective plate that protects the shunt body is slidably connected to the outside of the base plate. Springs B are symmetrically welded inside the protective plate, and a limiting block is welded to one side of springs B. Small bolts that connect to an ammeter are symmetrically threaded to the outside of the shunt body. Large bolts that connect to the circuit to be tested are symmetrically threaded to the outside of the shunt body.

[0007] By adopting the above technical solution, the ammeter is connected to the shunt body through two sets of small bolts, and then the two sets of large bolts on the shunt body are connected to the circuit to be tested. The measured value is then displayed in the ammeter.

[0008] After the circuit under test is completed, the ammeter and the circuit under test are separated from the shunt body. Then, the protective plate is pulled and slid outside the base plate. Then, the limit blocks symmetrically installed outside the protective plate are pressed. Then, the spring B on one side of the limit block is compressed. Then, the end of the protective plate is pushed into the connecting groove opened on the fixed block. Then, the spring B drives the limit block to pop outward, so that the limit block enters the limit hole opened on the fixed block, fixing the protective plate to the outside of the shunt body, thereby facilitating the protection of the shunt body.

[0009] Specifically, a fixing groove is provided on the top of the protective plate, a spring A is welded inside the bottom plate, and a support block is welded to one side of the spring A.

[0010] By adopting the above technical solution, when the protective plate is removed from the main body of the diverter, the spring A in the bottom plate drives the support block to pop outward, so that the support block enters the fixing groove opened on the protective plate, thereby facilitating the fixing of the protective plate.

[0011] Specifically, a roller is rotatably connected to the inner side of the support block.

[0012] By adopting the above technical solution, when the protective plate moves outside the base plate, the rollers rotatably connected to the support block contact the inside of the protective plate and roll as the protective plate moves, thereby reducing the friction between the support block and the protective plate.

[0013] Specifically, a rubber pad is adhered to the outer surface of the protective plate.

[0014] By adopting the above technical solution, when the protective plate enters the fixed block, the rubber pad outside the protective plate contacts the inside of the fixed block, thereby improving the sealing between the protective plate and the fixed block.

[0015] Specifically, the base plate has symmetrical grooves on its surface, and a slider connected to the protective plate is slidably connected to the inner side of the groove.

[0016] By adopting the above technical solution, when the protective plate is pulled to move, the sliders symmetrically welded on the inner side of the protective plate slide in the grooves symmetrically opened on the surface of the base plate, thereby improving the stability of the protective plate movement.

[0017] The beneficial effects of this utility model are:

[0018] (1) The current meter shunt device of this utility model, after the test circuit is completed, the ammeter and the test circuit are separated from the shunt device body, the support block in the fixed groove on the protective plate is pressed, the spring A on one side of the support block is compressed, the support block enters the bottom plate, and then the protective plate is pulled to slide outside the bottom plate. Then the limit block installed symmetrically on the outside of the protective plate is pressed, the spring B on one side of the limit block is compressed, and then the end of the protective plate is pushed into the connecting groove opened on the fixed block. Then the spring B drives the limit block to pop out, so that the limit block enters the limit hole opened on the fixed block, and the protective plate is fixed to the outside of the shunt device body, thereby facilitating the protection of the shunt device body.

[0019] (2) When the main body of the shunt device of the present invention is used, when the protective plate is moved to the bottom plate, the spring A in the bottom plate drives the support block to pop outward, so that the support block enters the fixing groove opened on the protective plate, thereby facilitating the fixing of the protective plate. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the overall structure of an energy meter shunt according to the present invention;

[0022] Figure 2 This is a partial internal structure diagram of the base plate of an energy meter shunt according to the present invention;

[0023] Figure 3 This is a schematic diagram of the fixed block structure of an electricity meter shunt according to the present invention;

[0024] Figure 4 This is a side view of the internal structure of the protective plate of an energy meter shunt according to the present invention;

[0025] In the diagram: 1. Protective plate; 2. Fixing block; 3. Limiting hole; 4. Support block; 5. Fixing groove; 6. Large bolt; 7. Diverter body; 8. Small bolt; 9. Limiting block; 10. Rubber pad; 11. Sliding block; 12. Slide groove; 13. Base plate; 14. Connecting groove; 15. Roller; 16. Spring A; 17. Spring B. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] To protect the main body 7 of the shunt, as one embodiment of this utility model, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the present invention discloses an energy meter shunt, comprising a shunt body 7, a base plate 13 for supporting the shunt body 7 being bolted to the bottom of the shunt body 7, a fixing block 2 being screwed to the end of the base plate 13, and a connecting groove 14 being provided on the inner side of the fixing block 2, and limit holes 3 being symmetrically provided on the surface of the fixing block 2, a protective plate 1 for protecting the shunt body 7 being slidably connected to the outside of the base plate 13, a spring B17 being symmetrically welded inside the protective plate 1, and a limit block 9 being welded to one side of the spring B17, a small bolt 8 for connecting to an ammeter being symmetrically threaded to the outside of the shunt body 7, and a large bolt 6 for connecting to the circuit to be tested being symmetrically threaded to the outside of the shunt body 7.

[0028] In use, the ammeter is connected to the shunt body 7 via two sets of small bolts 8, and then the two sets of large bolts 6 on the shunt body 7 are connected to the circuit to be tested. The measured value is then displayed in the ammeter.

[0029] After the circuit under test is completed, the ammeter and the circuit under test are separated from the shunt body 7. Then, the protective plate 1 is pulled to slide outside the base plate 13. Then, the limiting blocks 9 symmetrically installed outside the protective plate 1 are pressed. Then, the spring B17 on one side of the limiting block 9 is compressed. Then, the end of the protective plate 1 is pushed into the connecting groove 14 opened on the fixing block 2. Then, the spring B17 drives the limiting block 9 to pop outward, so that the limiting block 9 enters the limiting hole 3 opened on the fixing block 2, fixing the protective plate 1 to the outside of the shunt body 7, thereby facilitating the protection of the shunt body 7.

[0030] To secure the protective plate 1, for example, such as... Figure 1 , Figure 2 As shown, the present invention also includes a fixing groove 5 on the top of the protective plate 1, a spring A16 welded inside the bottom plate 13, and a support block 4 welded to one side of the spring A16.

[0031] When in use, when the protective plate 1 is removed from the main body 7 of the diverter, the spring A16 in the base plate 13 drives the support block 4 to pop outward, so that the support block 4 enters the fixing groove 5 opened on the protective plate 1, thereby facilitating the fixing of the protective plate 1.

[0032] To reduce friction between support block 4 and protective plate 1, for example, such as... Figure 1 As shown, the present invention also includes a roller 15 rotatably connected to the inner side of the support block 4.

[0033] When in use, when the protective plate 1 moves outside the base plate 13, the roller 15 rotatably connected to the support block 4 contacts the inside of the protective plate 1 and rolls as the protective plate 1 moves, thereby reducing the friction between the support block 4 and the protective plate 1.

[0034] To improve the sealing between the protective plate 1 and the fixing block 2, for example, such as Figure 1 As shown, the present invention also includes a rubber pad 10 adhered to the outer surface of the protective plate 1.

[0035] When in use, when the protective plate 1 enters the fixing block 2, the rubber pad 10 outside the protective plate 1 comes into contact with the inside of the fixing block 2, thereby improving the sealing between the protective plate 1 and the fixing block 2.

[0036] To improve the stability of the movement of the protective plate 1, for example, such as Figure 1 As shown, the present invention also includes symmetrical grooves 12 on the surface of the base plate 13, and a slider 11 connected to the protective plate 1 is slidably connected to the inner side of the grooves 12.

[0037] When the protective plate 1 is pulled to move, the slider 11 symmetrically welded on the inner side of the protective plate 1 slides in the groove 12 symmetrically opened on the surface of the base plate 13, which improves the stability of the movement of the protective plate 1.

[0038] In use, the limiting block 9 in the limiting hole 3 on the surface of the fixing block 2 is pressed, and then the spring B17 on one side of the limiting block 9 is compressed, so that the limiting block 9 enters the protective plate 1. Then the protective plate 1 is pulled out from the connecting groove 14 opened on the fixing block 2. The slider 11 installed in the protective plate 1 slides in the sliding groove 12 opened on the bottom plate 13. At the same time, the spring A16 in the bottom plate 13 remains compressed. When the protective plate 1 moves to the bottom of the bottom plate 13, the spring A16 in the bottom plate 13 drives the support block 4 to pop outward, so that the support block 4 enters the fixing groove 5 opened on the protective plate 1, fixing the protective plate 1. Then the ammeter is connected to the shunt body 7 through two sets of small bolts 8. Then the two sets of large bolts 6 on the shunt body 7 are connected to the circuit to be tested. Then the measured value is displayed in the ammeter.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A shunt device for an electricity meter, characterized in that, The device includes a shunt body (7), a base plate (13) for supporting the shunt body (7) is bolted to the bottom of the shunt body (7), a fixing block (2) is fixed at the end of the base plate (13) with screws, and a connecting groove (14) is provided on the inner side of the fixing block (2). Limiting holes (3) are symmetrically opened on the surface of the fixing block (2). A protective plate (1) for protecting the shunt body (7) is slidably connected to the outside of the base plate (13). A spring B (17) is symmetrically welded inside the protective plate (1), and a limiting block (9) is welded on one side of the spring B (17). Small bolts (8) for connecting to an ammeter are symmetrically threaded to the outside of the shunt body (7), and large bolts (6) for connecting to the circuit under test are symmetrically threaded to the outside of the shunt body (7).

2. The shunt device for an electricity meter according to claim 1, characterized in that, The top of the protective plate (1) is provided with a fixing groove (5), and a spring A (16) is welded inside the bottom plate (13). A support block (4) is welded to one side of the spring A (16).

3. A shunt device for an electricity meter according to claim 2, characterized in that, The inner side of the support block (4) is rotatably connected to a roller (15).

4. A shunt device for an electricity meter according to claim 1, characterized in that, A rubber pad (10) is adhered to the outer surface of the protective plate (1).

5. A shunt device for an electricity meter according to claim 1, characterized in that, The bottom plate (13) has symmetrical grooves (12) on its surface, and a slider (11) connected to the protective plate (1) is slidably connected to the inner side of the groove (12).

Images