Three-phase electric energy meter wiring device
By using a conductive cone to pierce the insulating skin and electrically connect it to the wire in the three-phase electrical energy meter wiring device, the problems of insulating skin scattering and wire winding when the connecting bolts are pierced into the cable in the prior art are solved, and the stability of the electrical connection and the protection of the cable are achieved.
Patent Information
- Application Number
- CN202421325901.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-06-12
AI Technical Summary
In the case of high voltage or high current, the existing three-phase electrical energy meter wiring device may easily cause large-scale dispersion and peeling of the insulation when the connecting bolts pierce into the cable, the internal conductive material may be entangled and confused, and may cause irreversible damage when dismantled.
A three-phase electrical energy meter wiring device is designed, which uses a conductive cone to pierce the insulating skin and electrically connect it to the wire. The design of the conductive cone does not rotate with the bolt during the downward pressure, avoiding the insulating skin and wire wrapping. At the same time, the structure of the conductive cone ensures the stability of its electrical connection with the cable.
It effectively avoids the scattering of cable insulation and the chaotic winding of wires, ensures the stability of electrical connections, and reduces the risk of damage during wiring and removal.
Smart Images
Figure CN223006210U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of electricity meter wiring, and particularly to a three-phase electricity meter wiring device. Background Art
[0002] An electricity meter is an instrument used to measure electric energy, also known as a watt-hour meter, a fire meter, or a kilowatt-hour meter, which refers to an instrument for measuring various electrical quantities. When using an electricity meter, it should be noted that under low voltage and small current conditions, the electricity meter can be directly connected to the circuit for measurement. Under high voltage or large current conditions, the electricity meter cannot be directly connected to the line and needs to be used in conjunction with a voltage transformer or a current transformer.
[0003] A patent document with the publication number of 207067216U discloses a three-phase four-wire electricity meter anti-oxidation wiring device. By adopting a piercing method, it avoids excessive cutting of the insulating skin of the cable, effectively reduces the oxidation problem at the connection point, and improves the detection accuracy of the electricity meter, which has certain positive significance. However, there are also certain deficiencies. For example, when the connecting bolt in this application penetrates into the cable, due to the existence of its own thread, it will cause the insulating skin of the cable to be scattered and peeled off in a large area, and it may also cause the internal conductive material to be scattered and wound. Especially when it is removed later (during maintenance or repair), it may also bring out the internal conductive material of the cable, causing irreversible damage to the cable. Utility Model Content
[0004] The purpose of this application is to solve the above problems and provide a three-phase electricity meter wiring device.
[0005] To achieve the above purpose, the technical solution of this application is as follows:
[0006] A three-phase electricity meter wiring device includes a main body. A first mounting hole is provided at the top of the main body, and a second mounting hole is provided at the bottom of the first mounting hole, and the second mounting hole penetrates through the main body up and down; a wire passing hole is provided on the side wall of the main body, and the wire passing hole communicates with the first mounting hole; a gasket is provided in the first mounting hole, a crimping bolt is provided in the second mounting hole, a rotating column is rotatably provided at the bottom of the crimping bolt, a conductive cone is provided at the bottom of the rotating column, the middle diameter of the conductive cone in the up and down direction is larger than the end diameter in the up and down direction, and the bottom of the conductive cone is sharply provided.
[0007] Preferably, a rotating groove is provided on the bottom end face of the crimping bolt, and a first limiting groove is provided on the inner wall of the rotating groove; a second limiting groove is provided on the outer peripheral wall of the rotating column, a split washer is sleeved on the second limiting groove; the rotating column is rotatably matched with the rotating groove.
[0008] Preferably, the conductive cone includes a first cone and a second cone, the top diameter of the first cone is smaller than the bottom diameter of the first cone, the top diameter of the second cone is larger than the bottom diameter of the second cone and is the same as the bottom diameter of the first cone, the top of the first cone is connected to the bottom of the rotating column, and the top of the second cone is connected to the bottom of the first cone.
[0009] Preferably, annular grooves are symmetrically provided at the bottom of the first mounting hole, and annular plates are symmetrically provided at the edge of the gasket, and the annular plates are plug-fitted into the annular grooves.
[0010] Preferably, a calibration column is provided on the edge of the gasket, and a calibration groove is correspondingly provided on the inner wall of the first mounting hole, and the calibration column is snap-fitted with the calibration groove.
[0011] Preferably, the bottom of the main body is recessed upward to form a snap-in groove, and the groove wall of the snap-in groove includes a first arc-shaped wall and a second arc-shaped wall, the second arc-shaped wall has two arcs, and the two second arc-shaped walls are respectively located on both sides of the first arc-shaped wall along the width direction of the main body, and are both connected to the first arc-shaped wall; the curvature of the first arc-shaped wall is greater than the curvature of the second arc-shaped wall.
[0012] Preferably, it further comprises a clamping plate, wherein the clamping plate is located at the bottom of the main body, and an arc-shaped clamping plate is elastically provided on one side of the clamping plate facing the first arc-shaped wall.
[0013] Preferably, it further comprises a cover plate, wherein the cover plate is arranged on the top of the main body.
[0014] The present application discloses a three-phase electric energy meter wiring device, in which a rotating column is rotatably provided at the bottom of the crimping bolt, and a conductive cone is provided at the bottom of the rotating column. In the process of the crimping bolt being gradually pressed down, the conductive cone will gradually pierce the insulating skin of the cable at the bottom of the main body and be electrically connected to the internal wire. When the crimping bolt is gradually pressed down, the conductive cone will not rotate with the crimping bolt when it is rubbed by the cable, thereby avoiding the phenomenon of scattered glass of the cable insulation and chaotic entanglement of the internal wires. Furthermore, since the middle diameter of the conductive cone in the up-down direction is larger than the end diameter in the up-down direction, when the conductive cone is inserted into the cable, the removal of the conductive cone will be subject to certain restrictions, and it can only be pulled out when there is a large force, thereby ensuring the stability of the electrical connection between the conductive cone and the cable to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is an exploded schematic diagram of the overall structure of this application;
[0016] Figure 2 for Figure 1 A partial enlarged schematic diagram in the middle;
[0017] Figure 3 For Figure 1 Another perspective view;
[0018] Figure 4 Is a cross-sectional view of the present application;
[0019] Figure 5 For Figure 4 The enlarged schematic view of the partial area at B in
[0020] Figure 6 For Figure 4 The enlarged schematic view of the partial area at C in
[0021] In the figure:
[0022] 1. Main body; 10. Shoulder; 11. Clamping groove; 110. First arc wall; 111. Second arc wall; 112. Limit groove; 12. First mounting hole; 120. Annular groove; 13. Calibration groove; 14. Second mounting hole; 15. Wire passing hole; 2. Crimping bolt; 20. Gasket; 21. Annular plate; 22. Calibration post; 23. Rotating post; 230. Inserting post; 24. Notch washer; 25. Conductive cone; 251. First cone; 252. Second cone; 260. First limiting groove; 261. Inserting groove; 3. Cover plate; 30. Card slot; 4. Clamping plate; 40. Spring; 5. Arc clamping plate. Detailed implementation manners
[0023] Now, the present application will be further described in detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, which only illustrate the basic structure of the present application in a schematic manner, so they only show the components related to the present application.
[0024] As Figures 1-6 shown, a three-phase watt-hour meter wiring device includes a main body 1. A first mounting hole 12 is provided at the top of the main body 1, a second mounting hole 14 is provided at the bottom of the first mounting hole 12, and the second mounting hole 14 penetrates through the main body 1 up and down; a wire passing hole 15 is provided on the side wall of the main body 1, and the wire passing hole 15 communicates with the first mounting hole 12; a gasket 20 is provided in the first mounting hole 12, a crimping bolt 2 is provided in the second mounting hole 14, a rotating post 23 is rotatably provided at the bottom of the crimping bolt 2, a conductive cone 25 is provided at the bottom of the rotating post 23, the diameter of the middle part of the conductive cone 25 in the up and down direction is larger than the diameter of the end part in the up and down direction, and the bottom of the conductive cone 25 is sharply provided.
[0025] The crimping bolt 2 is threadedly connected to the second mounting hole 14, and a through hole is provided on the gasket 20 for the crimping bolt 2 to pass through. When wiring, the voltage line is passed through the threading hole 15 to the bottom of the first mounting hole 12. At this time, the voltage line is crimped with the gasket 20, and then the crimping bolt 2 is passed through the through hole in the gasket 20 and screwed into the second mounting hole 14. Under the cooperation of the second mounting hole 14 and the crimping bolt 2, the gasket 20 will press the voltage line tightly.
[0026] A rotating column 23 is rotatably provided at the bottom of the crimping bolt 2, and a conductive cone 25 is provided at the bottom of the rotating column 23. In the process of the crimping bolt 2 being gradually pressed down, the conductive cone 25 will gradually pierce the insulation skin of the cable at the bottom of the main body 1 and be electrically connected to the internal wire. It should be pointed out that when the crimping bolt 2 is gradually pressed down, the conductive cone 25 can be rubbed by the cable without rotating with the crimping bolt 2, thereby avoiding the phenomenon of scattered glass of the cable insulation skin and chaotic entanglement of the internal wires. Furthermore, since the middle diameter of the conductive cone 25 in the up and down direction is larger than the end diameter in the up and down direction, when the conductive cone 25 is inserted into the cable, the removal of the conductive cone 25 will be subject to certain restrictions, and it can only be pulled out when there is a large force, thereby ensuring the stability of the electrical connection between the conductive cone 25 and the cable to a certain extent.
[0027] In some further embodiments, a rotation groove is provided on the bottom end face of the crimping bolt 2, and a first limiting groove 260 is provided on the inner wall of the rotation groove; a second limiting groove is provided on the outer peripheral wall of the rotation column 23, and a notched washer 24 is sleeved on the second limiting groove; the rotation column 23 rotates in cooperation with the rotation groove.
[0028] When mating, the top of the rotating column 23 is pressed against the inside of the rotating groove with force, and the notched washer 24 is elastically deformed and sinks into the second limiting groove. When the notched washer 24 is abutted against the first limiting groove 260, the notched washer 24 regains the space for elastic expansion, namely the first limiting groove 260. After that, the notched washer 24 is located between the first limiting groove 260 and the second limiting groove, and limits the axial movement of the rotating column 23 and the rotating groove while ensuring the relative rotation of the two.
[0029] In some further embodiments, the conductive cone 25 includes a first cone 251 and a second cone 252, the top diameter of the first cone 251 is smaller than the bottom diameter of the first cone 251, the top diameter of the second cone 252 is larger than the bottom diameter of the second cone 252 and is the same as the bottom diameter of the first cone 251, the top of the first cone 251 is connected to the bottom of the rotating column 23, and the top of the second cone 252 is connected to the bottom of the first cone 251.
[0030] Since the first cone 251 is connected to the rotating column 23, its top is preferably set as a plane to ensure the connection strength with the rotating column 23. The first cone 251 can be regarded as a positive cone; the second cone 252 can be regarded as an inverted cone, and its bottom is sharp to ensure that it can be inserted into the interior of the cable.
[0031] In some other embodiments, the rotating column 23 and the conductive cone 25 can be integrally provided.
[0032] In addition, in order to ensure the electrical connectivity between the rotating column 23 and the crimping bolt 2, a plug column 230 is provided at the top of the rotating column 23, and a plug slot 261 is provided at the bottom of the rotating slot. When the first limiting slot 260 and the second limiting slot are at the same height, the top of the plug column 230 always abuts against the bottom of the plug slot 261. Of course, the plug column 230 can rotate freely in the plug slot 261.
[0033] In some further embodiments, annular grooves 120 are symmetrically provided at the bottom of the first mounting hole 12, and annular plates 21 are symmetrically provided at the edges of the gasket 20. The annular plates 21 are in plug-in fit with the annular grooves 120.
[0034] By providing the annular plates 21 and the annular grooves 120, the gasket 20 can be more stable when crimping the voltage line and will not rotate with the rotation of the crimping bolt 2, thus avoiding the rotation of the gasket 20 during the process of crimping the voltage line and driving the voltage line to slide, thereby reducing the risk of a small overlap degree between the gasket 20 and the voltage line during crimping.
[0035] In some further embodiments, calibration posts 22 are provided at the edges of the gasket 20, and calibration slots 13 are correspondingly provided on the inner wall of the first mounting hole 12. The calibration posts 22 are in snap-fit with the calibration slots 13.
[0036] Since the first mounting hole 12 has a certain depth, in order to prevent the gasket 20 from being skewed when placed inside the first mounting hole 12, which may cause the failure of crimping the voltage line, the calibration slots 13 and the calibration posts 22 are specifically provided. When placing the gasket 20, the calibration slots 13 and the calibration posts 22 can be made to cooperate with each other to prevent the gasket 20 from being vertically placed when it finally falls to the bottom of the first mounting hole 12.
[0037] In addition, it can be conceived that under the action of the annular plates 21, the entire gasket 20 has a certain thickness, which can also reduce the probability of the gasket 20 tilting during the falling process.
[0038] In some further embodiments, a clamping groove 11 is formed by the bottom of the main body 1 being recessed upward. The groove wall of the clamping groove 11 includes a first arc wall 110 and a second arc wall 111. There are two arcs of the second arc wall 111, and the two second arc walls 111 are respectively located on both sides of the first arc wall 110 along the width direction of the main body 1 and are both connected to the first arc wall 110; the radian of the first arc wall 110 is greater than that of the second arc wall 111.
[0039] The clamping groove 11 is mainly used for clamping cables. Since the radian of the first arc wall 110 is greater than that of the second arc wall 111, the cable will be gradually pressed into the area of the first arc wall 110. The second arc wall 111 plays a certain role in guiding and buffering the cable, and finally the cable enters the area corresponding to the first arc wall 110 with a larger radian, making the whole cable more compact under pressure and not overly flat and dispersed, further ensuring the electrical conductivity.
[0040] In some further embodiments, a clamping plate is further included. The clamping plate is located at the bottom of the main body 1, and an arc-shaped clamping plate 5 is elastically arranged on the side of the clamping plate facing the first arc wall 110.
[0041] The clamping plate 4 is in a plate-like structure, and a spring 40 is provided at the top thereof. The top of the spring 40 is connected to the bottom of the arc-shaped clamping plate 5. Under the action of the spring 40, the arc-shaped clamping plate 5 has a certain elasticity, so that when facing cables of different specifications, the arc-shaped clamping plate 5 can always adaptively clamp the cable.
[0042] It should be noted that the elastic coefficient of the spring 40 can be relatively large, that is, relatively "stiff", so as to ensure the smooth penetration of the conductive cone 25.
[0043] In some other embodiments, limiting grooves 112 are correspondingly arranged on both sides of the first arc wall 110 along the width direction of the main body 1 for the arc-shaped clamping plate 5, so as to play a certain limiting role on the arc-shaped clamping plate 5 when the arc-shaped clamping plate 5 and the first arc wall 110 clamp the cable, and avoid the problem of the arc-shaped clamping plate 5 shaking caused by the connection of the spring 40.
[0044] The main body 1 and the clamping plate can be connected by screws.
[0045] In some further embodiments, a cover plate 3 is further included. The cover plate 3 is arranged on the top of the main body 1.
[0046] The cover plate 3 is clamped on the top of the main body 1. Specifically, a shoulder 10 can be set on the top of the main body 1, and a slot 30 is set on the bottom of the cover plate 3. The shoulder 10 and the slot 30 are in clamping cooperation.
[0047] Obviously, the above embodiments are merely examples given for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present invention.
Claims
1. A three-phase electric energy meter wiring device, characterized in that: The invention comprises a main body (1), wherein a first mounting hole (12) is provided at the top of the main body (1), a second mounting hole (14) is provided at the bottom of the first mounting hole (12), and the second mounting hole (14) is arranged to pass through the main body (1) from top to bottom; a threading hole (15) is provided at the side wall of the main body (1), and the threading hole (15) is communicated with the first mounting hole (12); a gasket (20) is provided in the first mounting hole (12), and a crimping bolt (2) is provided in the second mounting hole (14), and a rotating column (23) is rotatably provided at the bottom of the crimping bolt (2), and a conductive cone (25) is provided at the bottom of the rotating column (23), and the diameter of the middle part of the conductive cone (25) in the vertical direction is larger than the diameter of the end part in the vertical direction, and the bottom of the conductive cone (25) is sharp.
2. The three-phase electric energy meter wiring device according to claim 1, characterized in that: The bottom end surface of the crimping bolt (2) is provided with a rotation groove, and the inner wall of the rotation groove is provided with a first limiting groove (260); the outer peripheral wall of the rotation column (23) is provided with a second limiting groove, and a notched washer (24) is sleeved on the second limiting groove; the rotation column (23) is rotationally matched with the rotation groove.
3. The three-phase electric energy meter wiring device according to claim 2, characterized in that: The conductive cone (25) comprises a first cone (251) and a second cone (252); the top diameter of the first cone (251) is smaller than the bottom diameter of the first cone (251); the top diameter of the second cone (252) is larger than the bottom diameter of the second cone (252) and is the same as the bottom diameter of the first cone (251); the top of the first cone (251) is connected to the bottom of the rotating column (23); and the top of the second cone (252) is connected to the bottom of the first cone (251).
4. The three-phase electric energy meter wiring device according to claim 3, characterized in that: An annular groove (120) is symmetrically provided at the bottom of the first mounting hole (12), and an annular plate (21) is symmetrically provided at the edge of the gasket (20), and the annular plate (21) is plug-fitted into the annular groove (120).
5. The three-phase electric energy meter wiring device according to claim 4, characterized in that: A calibration column (22) is provided on the edge of the gasket (20), and a calibration groove (13) is correspondingly provided on the inner wall of the first mounting hole (12), and the calibration column (22) is snap-fitted with the calibration groove (13).
6. The three-phase electric energy meter wiring device according to claim 5, characterized in that: The bottom of the main body (1) is recessed upward to form a snap-fit groove (11); the groove wall of the snap-fit groove (11) comprises a first arc-shaped wall (110) and a second arc-shaped wall (111); the second arc-shaped wall (111) has two arcs, and the two second arc-shaped walls (111) are respectively located on both sides of the first arc-shaped wall (110) along the width direction of the main body (1), and are both connected to the first arc-shaped wall (110); the curvature of the first arc-shaped wall (110) is greater than the curvature of the second arc-shaped wall (111).
7. The three-phase electric energy meter wiring device according to claim 6, characterized in that: It also comprises a clamping plate, the clamping plate being located at the bottom of the main body (1), and an arc-shaped clamping plate (5) being elastically provided on one side of the clamping plate facing the first arc-shaped wall (110).
8. The three-phase electric energy meter wiring device according to claim 7, characterized in that: It also comprises a cover plate (3), wherein the cover plate (3) is arranged on the top of the main body (1).