Short circuit prevention isolation device for three-phase direct-in electric energy meter

Abstract

The invention relates to the technical field of electric power, in particular to a short circuit prevention isolation device for a three-phase direct-in electric energy meter, and the device comprises an extension mechanism which is electrically connected with an electrical wiring port of the three-phase direct-in electric energy meter; a fixing mechanism is fixedly arranged at the lower end of the extending mechanism and electrically connected with the extending mechanism. And a plugging mechanism electrically connected with the cable lead is plugged at the lower end of the fixing mechanism and is electrically connected with the fixing mechanism. According to the short circuit prevention isolation device for the three-phase direct-in electric energy meter, the correct wire sequence of wiring of each phase is ensured, and the short circuit condition is completely eradicated.

Description

Technical Field

[0001] The invention relates to the field of electric power technology, in particular to a short-circuit proof isolation device for a three-phase direct-entry electric energy meter. Background Art

[0002] The three-phase direct-entry watt-hour meter is a meter used to measure the power consumption in a three-phase power system. It is widely used in power consumption places such as industry, commerce and large buildings to measure the power consumption of three-phase alternating current.

[0003] The three-phase direct-entry electric energy meter does not need to be connected to the current, so the current transformer is omitted and the problem of secondary current open circuit is eliminated. This makes the three-phase direct-entry electric energy meter have higher accuracy, wider application range, and easier maintenance and repair.

[0004] At present, when installing a three-phase direct-entry electric energy meter, it is necessary to connect the three-phase incoming and outgoing lines separately. However, the conventional crimping wiring method still has the following shortcomings: 1. It is necessary to ensure that the wiring of each phase must be correct, otherwise it will increase the measurement error; 2. During the wiring process, due to the proximity of the terminals, the crimping work takes a long time, has low efficiency, and may also cause short circuits. Summary of the invention

[0005] In order to solve the technical problems existing in the background technology, the present invention provides a three-phase direct-entry electric energy meter short-circuit protection isolation device to ensure that the wiring sequence of each phase is correct and prevent the occurrence of short circuit.

[0006] The technical solution adopted by the present invention is: A short-circuit protection isolation device for a three-phase direct-entry electric energy meter comprises: an extension mechanism electrically connected to an electrical connection port of the three-phase direct-entry electric energy meter; a fixing mechanism fixedly arranged at the lower end of the extension mechanism, the fixing mechanism being electrically connected to the extension mechanism; a plug-in mechanism electrically connected to a cable lead being plugged into the lower end of the fixing mechanism, the plug-in mechanism being electrically connected to the fixing mechanism.

[0007] Furthermore, the extending mechanism comprises: A connecting rod is inserted into the terminal socket of a three-phase direct-entry electric energy meter, wherein a top head is arranged at the upper end of the connecting rod, a groove is arranged on the outer wall of the connecting rod, a fixing nut and a fixing screw are coaxially connected in sequence at the lower end of the connecting rod, and a connecting lead is electrically connected at the lower end of the fixing screw.

[0008] Furthermore, the head is configured to be hemispherical so as to be inserted into the terminal jack of the three-phase direct-entry electric energy meter; The groove is arranged on the front end outer wall of the connecting rod.

[0009] Furthermore, the fixing mechanism comprises: A fixing box, wherein the front end of the fixing box is provided with an inwardly concave upper front groove, the upper end of the fixing box is provided with an inwardly concave upper screw hole, and a containing groove, a sliding groove, and a slot are sequentially provided on the fixing box directly below the upper screw hole, the upper and lower ends of the sliding groove are respectively connected with the containing groove and the slot, and the left and right sides of the sliding groove are symmetrically provided with inwardly concave slideways, the slideways penetrate to the lower end of the fixing box, and the slot extends downward to the lower end of the fixing box, an upper through-groove is provided in communication between the upper screw hole and the upper front groove, a connecting lead is passed through the upper through-groove to the upper front groove, a lower through-groove is provided in communication between the slot and the upper front groove, an elastic push plate is fixedly provided at the lower part of the upper front groove, the elastic push plate extends into the slot through the lower through-groove, an electrical pressure ring is provided at the front end of the elastic push plate, and the electrical pressure ring is electrically connected to the connecting lead; A return spring is arranged in the groove, a sliding block is arranged in the sliding groove, and sliding plates are symmetrically arranged on the left and right sides of the sliding block. The sliding plates are slidably inserted in the slideway, and a concave wedge plate is arranged at the lower part of the front end of the sliding block; The front end cover of the upper front groove is provided with an upper sealing cover.

[0010] Furthermore, an insulating partition is provided between the receiving groove and the upper screw hole.

[0011] Furthermore, the receiving groove and the upper screw hole are configured as two independent spaces.

[0012] Furthermore, the elastic push plate is configured in a "U" shape and is accommodated in the upper front groove, the slot and the through groove.

[0013] Furthermore, the bottom of the groove and the upper end of the sliding block are respectively provided with columnar protrusions; The return spring is sleeved on the protrusion and abuts against the bottom of the receiving groove and the upper end of the sliding block respectively.

[0014] Furthermore, the plug-in mechanism comprises: A plug-in box, wherein the front end of the plug-in box is provided with an inwardly concave lower front groove, an electrical pressure plate is provided in the lower front groove, the electrical pressure plate is electrically connected by the cable lead inserted through the lower end of the plug-in box, a card slot is provided at the edge of the lower front groove, and anti-slip grooves are symmetrically provided on the left and right sides of the middle of the plug-in box; A plug is fixedly arranged at the upper end of the plug box, and the plug is inserted into the slot. A concave limiting groove is arranged on the front end surface of the plug, and an electrical connecting plate electrically connected to the electrical pressure plate is arranged on the bottom of the limiting groove; The front end cover of the lower front groove is provided with a lower sealing cover, and a clamping ear is protrudingly provided at the edge of the lower sealing cover.

[0015] Furthermore, the left and right sides of the middle part of the plug-in box are symmetrically provided with inwardly concave arc-shaped notches, the anti-slip lines are extended along the front-back direction and arranged at the notches, and a plurality of them are arranged in parallel along the up-down direction; A positioning protrusion is protruded from the plug box behind the plug, and a positioning groove matching the positioning protrusion is provided at the lower end of the fixing box; The card slot extends upward to the upper end of the plug-in box, and the card ear is slidably plugged into the card slot.

[0016] The beneficial effects of the three-phase direct-entry electric energy meter short-circuit protection isolation device of the present invention are as follows: 1. Extend the three-phase direct-entry electric energy meter terminal blocks outward through the extension mechanism and the fixing mechanism; 2. Improve work efficiency through the plug-in mechanism and prevent short circuit caused by misoperation; 3. Use positioning grooves and positioning protrusions to distinguish and ensure the correct line sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of an example of the present invention; Figure 2 is a three-dimensional schematic diagram of an extension mechanism of an example of the present invention; Figure 3 It is a three-dimensional schematic diagram of a fixing mechanism of an example of the present invention; Figure 4 is a cutaway perspective schematic diagram of a fixing mechanism of an example of the present invention; Figure 5 It is a three-dimensional schematic diagram of the plug-in mechanism of an example of the present invention.

[0018] In the figure: 1. Extension mechanism, 10. Connecting rod, 11. Head, 12. Groove, 13. Fixing nut, 14. Fixing screw, 2. Fixed mechanism, 20, fixing box, 210, upper front slot, 211, upper screw hole, 212, receiving slot, 213, slide slot, 214, slideway, 215, slot, 221, upper slot, 222, lower slot, 230, slider, 231, slide plate, 232, wedge plate, 233, return spring, 241, elastic push plate, 242, electrical pressure ring, 25, upper cover, 3. Plug-in mechanism, 30, plug-in box, 311, lower front slot, 312, electrical pressure plate, 313, card slot, 32, anti-slip pattern, 331, plug, 332. Limiting groove, 333. Electrical connecting plate, 334. Positioning protrusion, 340. Lower cover, 341. Ear. DETAILED DESCRIPTION

[0019] In order to more clearly and specifically explain the specific implementation purpose and implementation mode of the present invention, the technical solution of the present invention will be fully described below. The described embodiments are part of the embodiments of the present invention, but not all of them. Without making creative work, all other embodiments based on the embodiments described in the present invention belong to the protection scope of the present invention.

[0020] The present invention provides a three-phase direct-entry electric energy meter short-circuit protection isolation device, such as Figure 1 As shown, including: An extension mechanism 1 electrically connected to the electrical connection port of a three-phase direct-entry electric energy meter, such as Figure 2 As shown, including: A connecting rod 10 is inserted into the terminal socket of a three-phase direct-entry electric energy meter. A top head 11 is provided at the upper end of the connecting rod 10. The top head 11 is arranged in a hemispherical shape so as to be inserted into the terminal socket of the three-phase direct-entry electric energy meter. A groove 12 is provided on the outer wall of the connecting rod 10. The groove 12 is arranged on the front end outer wall of the connecting rod 10. The lower end of the connecting rod 10 is coaxially connected with a fixing nut 13 and a fixing screw 14 in sequence. The lower end of the fixing screw 14 is electrically connected with a connecting lead.

[0021] The lower end of the extension mechanism 1 is fixedly provided with a fixing mechanism 2 which is electrically connected to the extension mechanism 1. Figure 3 , Figure 4 As shown, including: The fixing box 20 is provided with a concave upper front groove 210 at the front end of the fixing box 20, and a concave upper screw hole 211 is provided at the upper end of the fixing box 20. A receiving groove 212, a slide groove 213, and a slot 215 are sequentially provided on the fixing box 20 directly below the upper screw hole 211. The receiving groove 212 and the upper screw hole 211 are set as two independent spaces, and an insulating partition is provided between the receiving groove 212 and the upper screw hole 211. The upper and lower ends of the slide groove 213 are respectively connected to the receiving groove 212 and the slot 215. The left and right sides of the slide groove 213 are symmetrically provided with concave slideways 214, and the slideways 214 penetrate to the lower end of the fixing box 20. The slot 215 Extending downward to the lower end of the fixing box 20, an upper through-groove 221 is provided between the upper screw hole 211 and the upper front groove 210, and a connecting lead is passed through the upper through-groove 221 to the upper front groove 210, and a lower through-groove 222 is provided between the slot 215 and the upper front groove 210, and an elastic push plate 241 is fixedly provided at the lower part of the upper front groove 210, and the elastic push plate 241 is provided in a "U" shape and accommodated in the upper front groove 210, the slot 215, and the through-groove 222, and the elastic push plate 241 extends into the slot 215 through the lower through-groove 222, and an electrical pressure ring 242 is provided at the front end of the elastic push plate 241, and the electrical pressure ring 242 is electrically connected to the connecting lead; A return spring 233 is provided in the groove 212. The bottom of the groove 212 and the upper end of the slider 230 are respectively provided with columnar protrusions. The return spring 233 is sleeved on the protrusions and respectively abuts against the bottom of the groove 212 and the upper end of the slider 230. The slider 230 is slidably provided in the slide groove 213. Slide plates 231 are symmetrically provided on the left and right sides of the slider 230. The slide plate 231 is slidably inserted in the slideway 214. A concave wedge plate 232 is provided at the lower part of the front end of the slider 230. The front end cover of the upper front groove 210 is provided with an upper cover 25 .

[0022] The lower end of the fixing mechanism 2 is plugged with a plug-in mechanism 3 which is electrically connected to the cable lead and the fixing mechanism 2 respectively. Figure 5 As shown, including: A plug-in box 30, wherein the left and right sides of the middle of the plug-in box 30 are symmetrically provided with inwardly concave arc-shaped notches, the anti-slip lines 32 are extended in the front-to-back direction and arranged at the notches, and a plurality of lines are arranged in parallel in the up-down direction, the front end of the plug-in box 30 is provided with an inwardly concave lower front groove 311, the lower front groove 311 is provided with an electrical pressure plate 312, the electrical pressure plate 312 is electrically connected by the cable lead inserted from the lower end of the plug-in box 30, a card slot 313 is provided at the edge of the lower front groove 311, the card slot 313 extends upward to the upper end of the plug-in box 30, and the anti-slip lines 32 are symmetrically provided on the left and right sides of the middle of the plug-in box 30; A plug 331 is fixedly provided at the upper end of the plug box 30, and the plug 331 is inserted into the slot 215. Before insertion, an insulating sheath is provided on the outer cover of the plug 331. A concave limiting groove 332 is provided on the front end surface of the plug 331, and an electrical connecting plate 333 electrically connected to the electrical pressure plate 312 is provided on the bottom of the limiting groove 332. A positioning protrusion 334 is protruded on the plug box 30 behind the plug 331, and a positioning groove matching the positioning protrusion 334 is provided at the lower end of the fixed box 20; A lower cover 340 is provided at the front end cover of the lower front slot 311 . A latch 341 is protruded from the edge of the lower cover 340 . The latch 341 is slidably inserted into the latch slot 313 .

[0023] According to the specific structure of a three-phase direct-entry electric energy meter short-circuit protection isolation device in the above embodiment, the working method thereof is further described below: S1. Preparation: Insert the connecting rod 10 into the three-phase direct-entry electric energy meter terminal jack from the end of the top head 11, with the groove 12 facing the three-phase direct-entry electric energy meter terminal crimping bolt, and tighten the crimping bolt to the bottom of the groove 12; The cables are inserted from the lower end of the plug-in box 30 and are pressed by the electrical pressing plate 312 .

[0024] S2. Connection: The extension mechanism 1, the fixing mechanism 2, and the plugging mechanism 3 are respectively provided with six groups, corresponding to the three-phase inlet and outlet terminals of the three-phase direct-entry electric energy meter, and the fixing mechanism 2 and the plugging mechanism 3 of each group are distinguished by setting the positioning grooves and the positioning protrusions 334 at different positions; Remove the insulating sheath on the outer cover of the plug 331 and insert it into the slot 215. The upper end of the plug 331 abuts against the slider 230 and is pushed upward. The elastic push plate 241 slides along the wedge plate 232 until the positioning groove and the positioning protrusion 334 are engaged, and the elastic push plate 241 is electrically connected to the electrical connecting plate 333.

[0025] S3, separation: When the plug 331 is pulled out from the slot 215 , the slider 230 moves downward with the plug 331 under the thrust of the return spring 233 , and the elastic push plate 241 separates from the electrical connection plate 333 and slides along the wedge plate 232 .

[0026] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Through the above description, relevant staff can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the contents of the specification. All so-called equal changes and modifications of the shapes, structures, features and spirits described in the scope of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A three-phase direct-entry electric energy meter short-circuit protection isolation device, characterized in that: include: An extension mechanism (1) electrically connected to an electrical connection port of a three-phase direct-entry electric energy meter; A fixing mechanism (2) is fixedly provided at the lower end of the extending mechanism (1), and the fixing mechanism (2) is electrically connected to the extending mechanism (1); A plug-in mechanism (3) electrically connected to the cable lead is plugged into the lower end of the fixing mechanism (2), and the plug-in mechanism (3) is electrically connected to the fixing mechanism (2).

2. A three-phase direct-entry electric energy meter short-circuit protection isolation device according to claim 1, characterized in that: The extending mechanism (1) comprises: A connecting rod (10) is inserted into a terminal socket of a three-phase direct-entry electric energy meter, wherein a top head (11) is provided at the upper end of the connecting rod (10), a groove (12) is provided on the outer wall of the connecting rod (10), a fixing nut (13) and a fixing screw (14) are coaxially connected in sequence at the lower end of the connecting rod (10), and a connecting lead is provided at the lower end of the fixing screw (14) for electrical connection.

3. A three-phase direct-entry electric energy meter short-circuit protection isolation device according to claim 2, characterized in that: The top head (11) is configured to be hemispherical so as to be inserted into a terminal socket of a three-phase direct-entry electric energy meter; The groove (12) is arranged on the front end outer wall of the connecting rod (10).

4. A three-phase direct-entry electric energy meter short-circuit protection isolation device according to claim 2, characterized in that: The fixing mechanism (2) comprises: A fixing box (20), wherein a front end of the fixing box (20) is provided with an inwardly concave upper front groove (210), an upper end of the fixing box (20) is provided with an inwardly concave upper screw hole (211), and a receiving groove (212), a slide groove (213), and a slot (215) are sequentially provided on the fixing box (20) directly below the upper screw hole (211), the upper and lower ends of the slide groove (213) are respectively connected to the receiving groove (212) and the slot (215), and the left and right sides of the slide groove (213) are symmetrically provided with inwardly concave slideways (214), the slideways (214) penetrate to the lower end of the fixing box (20), and the slot (215) extends downward. Extending to the lower end of the fixing box (20), an upper through groove (221) is provided between the upper screw hole (211) and the upper front groove (210), a connecting lead is passed through the upper through groove (221) to the upper front groove (210), a lower through groove (222) is provided between the slot (215) and the upper front groove (210), an elastic push plate (241) is fixedly provided at the lower part of the upper front groove (210), the elastic push plate (241) extends into the slot (215) through the lower through groove (222), an electrical pressure ring (242) is provided at the front end of the elastic push plate (241), and the electrical pressure ring (242) is electrically connected to the connecting lead; A return spring (233) is provided in the receiving groove (212), a sliding block (230) is slidably provided in the sliding groove (213), sliding plates (231) are symmetrically provided on the left and right sides of the sliding block (230), the sliding plates (231) are slidably inserted in the slideway (214), and a concave wedge plate (232) is provided at the lower part of the front end of the sliding block (230); The front end cover of the upper front groove (210) is provided with an upper sealing cover (25).

5. A three-phase direct-entry electric energy meter short-circuit protection isolation device according to claim 4, characterized in that: An insulating partition is provided between the receiving groove (212) and the upper screw hole (211).

6. A three-phase direct-entry electric energy meter short-circuit protection isolation device according to claim 4, characterized in that: The containing groove (212) and the upper screw hole (211) are arranged as two independent spaces.

7. A three-phase direct-entry electric energy meter short-circuit protection isolation device according to claim 4, characterized in that: The elastic push plate (241) is configured in a "U" shape and is accommodated in the upper front groove (210), the slot (215), and the through groove (222).

8. A three-phase direct-entry electric energy meter short-circuit protection isolation device according to claim 4, characterized in that: The bottom of the groove (212) and the upper end of the sliding block (230) are respectively provided with columnar protrusions; The return spring (233) is sleeved on the protrusion and respectively abuts against the bottom of the receiving groove (212) and the upper end of the sliding block (230).

9. A three-phase direct-entry electric energy meter short-circuit protection isolation device according to claim 8, characterized in that: The plug-in mechanism (3) comprises: A plug-in box (30), wherein a concave lower front groove (311) is provided at the front end of the plug-in box (30), an electrical pressure plate (312) is provided in the lower front groove (311), the electrical pressure plate (312) is electrically connected by a cable lead inserted through the lower end of the plug-in box (30), a card slot (313) is provided at the edge of the lower front groove (311), and anti-slip grooves (32) are symmetrically provided on the left and right sides of the middle of the plug-in box (30); A plug (331) is fixedly provided at the upper end of the plug box (30), the plug (331) being inserted into the slot (215), an inwardly concave limiting groove (332) being provided on the front end surface of the plug (331), and an electrical connecting plate (333) electrically connected to the electrical pressure plate (312) being provided on the bottom of the limiting groove (332); The front end cover of the lower front groove (311) is provided with a lower cover (340), and a clamping ear (341) is protruding from the edge of the lower cover (340).

10. A three-phase direct-entry electric energy meter short-circuit protection isolation device according to claim 9, characterized in that: The left and right sides of the middle of the plug-in box (30) are symmetrically provided with inwardly concave arc-shaped notches, and the anti-slip lines (32) are extended in the front-to-back direction and arranged at the notches, and a plurality of them are arranged in parallel in the up-down direction; A positioning protrusion (334) is protruding from the plug box (30) behind the plug (331), and a positioning groove matching the positioning protrusion (334) is provided at the lower end of the fixing box (20); The card slot (313) extends upward to the upper end of the plug-in box (30), and the card ear (341) is slidably plugged into the card slot (313).

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