Insulation clamp for live replacement of electric energy meter

Abstract

The invention relates to the technical field of electric energy meter maintenance equipment, in particular to an insulating clamp for live replacement of an electric energy meter, which comprises an upper clamp body and a lower clamp body, the left lower side of the upper clamp body and the left upper side of the lower clamp body are rotatably mounted together, and the left lower side of the upper clamp body and the left upper side of the lower clamp body are provided with wire end clamping grooves with opposite openings. According to the invention, the structure is reasonable and compact, the operation is simple, the dismounting and clamping can be realized, the replacement and taking can be realized, and the efficiency of meter replacement work is greatly improved; compared with a disposable insulating tape, the insulating clamp is convenient to use, can be repeatedly used, is more economical and environment-friendly, can reduce the use cost, avoids secondary pollution or insulation failure, and also can solve the problem of violation operation of maintenance personnel in a trouble-saving manner; the insulating clamp can completely wrap the exposed wiring end, the risks of electric shock of personnel and interphase short circuit of wires are avoided, the insulating performance is more stable, aging and falling off caused by environmental factors are avoided, and reliable insulating protection can be provided in the meter replacement process.

Description

Technical Field

[0001] This invention relates to the field of electricity meter maintenance equipment technology, specifically an insulating clamp for replacing electricity meters while the circuit is energized. Background Technology

[0002] During routine replacement or fault repair of three-phase three-wire and three-phase four-wire energy meters, to prevent incorrect wiring, each wire is usually marked. The work sequence is to disconnect the wiring of the three-phase four-wire energy meter one by one, marking each wire as it is disconnected. After all wires are disconnected, the energy meter is removed, and a new energy meter is installed. Then, maintenance personnel reconnect the wires in the same order according to the original markings. This method is inefficient, time-consuming, and prone to incorrect meter wiring, causing metering errors and affecting the line loss rate of the distribution area.

[0003] When replacing electricity meters, due to factors such as the power supply method or the nature of the customer's electricity usage, it is often impossible to replace them after a power outage. Replacement must be done while the meter is energized, which is a high-risk operation. During live meter replacement, the exposed wire ends of the removed original meter are often left exposed. For safety reasons, there are generally two methods: one is to wrap the exposed wire ends with electrical insulating tape. However, wrapping and removing the tape is cumbersome, time-consuming, and inefficient. In actual live meter replacement operations, maintenance personnel often fail to wrap the wire ends, posing a significant safety hazard. The second method is to use an insulating sleeve to cover the exposed wire ends from above the wire connector. However, the insulating sleeve is very prone to falling off during replacement, exposing the exposed wire ends. Therefore, during the process of replacing electricity meters while the power is on, maintenance personnel are at high risk of electric shock or short-circuit arc burns due to exposed wire ends. In severe cases, this could even lead to the death of maintenance personnel, posing a significant personal risk. In addition, exposed wire ends can also easily cause phase-to-phase short circuits or damage other equipment due to shaking, thus expanding the scope of the fault.

[0004] Therefore, the existing live-line replacement process for electricity meters has the following shortcomings: unreliable insulation protection, which can easily lead to safety accidents due to improper operation or material failure, threatening the lives of maintenance personnel, equipment safety, and grid stability; the insulation operation is cumbersome, the meter replacement operation is time-consuming, and the work efficiency is low. In the case of batch meter replacement, it greatly extends the operation time and affects the speed of power restoration for users; the wiring lacks intuitive phase identification, and the wire number needs to be checked separately when wiring, which not only increases the workload, but also easily leads to damage to the electricity meter or metering errors due to misjudgment of the phase. Summary of the Invention

[0005] This invention provides an insulating clamp for live meter replacement, overcoming the shortcomings of the prior art. It effectively solves the problems of unreliable insulation protection, easy safety accidents caused by improper operation or material failure during live meter replacement, which threaten the lives of maintenance personnel, equipment safety and power grid stability; cumbersome insulation operation process, long meter replacement time and low work efficiency.

[0006] The technical solution of the present invention is achieved through the following measures: an insulating clamp for replacing an electricity meter under power, comprising an upper clamp body and a lower clamp body, wherein the lower left side of the upper clamp body and the upper left side of the lower clamp body are rotatably mounted together, and the lower left side of the upper clamp body and the upper left side of the lower clamp body are provided with wire end clamping grooves with opposite openings, and the front ends of both wire end clamping grooves are open to allow wire ends to pass through, and the rear ends of both wire end clamping grooves are blind ends to prevent wire ends from passing through; an elastic reset member is provided on the other side of the upper clamp body and the lower clamp body opposite to the direction of the wire end clamping grooves, and under the pre-tightening force of the elastic reset member, the lower left side of the upper clamp body and the upper left side of the lower clamp body are always abutting each other.

[0007] The following are further optimizations and / or improvements to the above-mentioned technical solution: An insulating half-sleeve with opposite openings can be installed in the two wire end clamping slots. When the two insulating half-sleeves are fastened together, they form an insulating sleeve with an axially hollow inner cavity, and the inner diameter of the insulating sleeve is slightly smaller than the outer diameter of the wire end.

[0008] The lower left side of the upper clamp and the upper left side of the lower clamp can be rotatably mounted together via a hinge. The hinge can include an upper ear plate, a lower ear plate, and a hinge shaft. Lower ear plates are installed on the upper left front side and the rear left front side of the lower clamp. Two upper ear plates are rotatably mounted between the two lower ear plates via a hinge shaft. The two upper ear plates are spaced apart front and back, and their upper ends are respectively mounted together with the corresponding positions on the lower left side of the upper clamp.

[0009] The aforementioned insulating sleeve may have at least four different colors to distinguish the phases of each wiring.

[0010] The aforementioned elastic reset component can be a torsion spring, which is mounted on a hinge shaft located between the two upper ear plates. The upper support leg of the torsion spring abuts against the corresponding position on the lower right side of the upper clamping body, and the lower support leg of the torsion spring abuts against the corresponding position on the upper right side of the lower clamping body.

[0011] The upper left side of the aforementioned upper clamp may be provided with a marking section, which includes at least two symbols to distinguish and identify the wiring sequence and phase of each wire.

[0012] Both the upper and lower clamps mentioned above can be made of fluorescent materials.

[0013] Both the upper and lower clamps can be T-shaped, with the head of the T-shape being the clamp head and the rest being the clamp handle. The length of the clamp head is greater than the width of the clamp handle.

[0014] Both the upper right side of the upper clamping body and the lower right side of the lower clamping body can be provided with anti-slip parts.

[0015] The right end of the aforementioned lower clamp may be provided with a through-hole.

[0016] This invention features a reasonable and compact structure, simple operation, and allows for immediate disassembly and clamping, significantly improving the efficiency of meter replacement. The insulating clamp is convenient and reusable, more economical and environmentally friendly than disposable insulating tape, reducing usage costs, preventing secondary pollution or insulation failure, and addressing the issue of maintenance personnel taking shortcuts and violating regulations. The insulating clamp completely covers exposed wire ends, preventing electric shock and short circuits, ensuring stable insulation performance that won't age or detach due to environmental factors, providing reliable insulation protection during meter replacement. The torsion spring's preload provides the insulating clamp with a certain elastic clamping force, firmly holding the wire ends in place without loosening, shifting, or detaching, guaranteeing reliable insulation of the wire ends during meter replacement and preventing safety accidents caused by insulation failure. This protects the lives of maintenance personnel, equipment safety, and grid stability. In emergency repairs or batch meter replacement scenarios, it significantly shortens equipment downtime and effectively improves power supply service response speed. Maintenance personnel can quickly identify the phase and sequence of each wiring according to the color and markings of the insulating half-set, avoiding incorrect wiring caused by phase confusion, ensuring the accuracy of wiring, reducing equipment damage or metering errors caused by incorrect wiring, reducing workload, greatly improving the efficiency of meter replacement, and enabling the insulating clamp to have the function of color-coded identification of wiring phase and sequence. Attached Figure Description

[0017] Appendix Figure 1 This is a schematic diagram of the main structure of embodiments 1-8 of the present invention.

[0018] Appendix Figure 2 For the appendix Figure 1 A schematic diagram of the main structure where the upper and lower clamping parts are fastened together.

[0019] Appendix Figure 3 For the appendix Figure 1 Schematic diagram of the three-dimensional structure Figure 1 .

[0020] Appendix Figure 4 For the appendix Figure 1 Schematic diagram of the three-dimensional structure Figure 2 .

[0021] Appendix Figure 5 This is a schematic diagram of the usage state of Embodiments 1-10 of the present invention.

[0022] The codes in the attached diagram are as follows: 1 is the upper clamp, 2 is the lower clamp, 3 is the blind end, 4 is the insulating half sleeve, 5 is the axial hollow inner cavity, 6 is the upper ear plate, 7 is the lower ear plate, 8 is the hinge shaft, 9 is the torsion spring, 10 is the upper support leg, 11 is the lower support leg, 12 is the marking part, 101 / 201 is the clamp, 102 / 202 is the clamp handle, and 13 is the electricity meter. Detailed Implementation

[0023] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0024] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0025] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figures 1 to 5 As shown, the insulating clamp for replacing an energized energy meter includes an upper clamp body 1 and a lower clamp body 2. The lower left side of the upper clamp body 1 and the upper left side of the lower clamp body 2 are rotatably mounted together. The lower left side of the upper clamp body 1 and the upper left side of the lower clamp body 2 are provided with wire end clamping grooves with opposite openings. The front ends of both wire end clamping grooves are open to allow wire ends to pass through. The rear ends of both wire end clamping grooves are blind ends 3 to prevent wire ends from passing through. An elastic reset member is provided on the other side of the upper clamp body 1 and the lower clamp body 2 opposite to the direction of the wire end clamping grooves. Under the pre-tightening force of the elastic reset member, the lower left side of the upper clamp body 1 and the upper left side of the lower clamp body 2 are always abutting each other.

[0026] Currently, although the electricity meters (13) used by power supply departments are manufactured by multiple manufacturers and come in both three-phase three-wire and three-phase four-wire specifications, they are all produced according to the unified enterprise standards of the State Grid Corporation of China. Therefore, the relative positions of the voltage and current terminal holes at the bottom of electricity meters (13) of different specifications from all manufacturers are uniform. Furthermore, according to relevant regulations and actual field usage, the voltage and current conductors connected to the three-phase electricity meter (13) are generally selected with a diameter of 4 mm². 2 Single-core hard copper wire.

[0027] In the above technical solution, under the pre-tightening force of the elastic reset component, the lower left side of the upper clamp 1 and the upper left side of the lower clamp 2 are always abutting each other. The wire end clamping groove on the upper clamp 1 and the wire end clamping groove on the lower clamp 2 are engaged together to form a cavity that can accommodate the wire end (conductor wire end). However, in order to achieve a reliable and firm clamping effect, the distance between the bottom of the wire end clamping groove on the upper clamp 1 and the bottom of the wire end clamping groove on the lower clamp 2 should be slightly smaller than the outer diameter of the wire end. Therefore, after the insulating clamp holds the wire end, there is a gap between the lower left side of the upper clamp 1 and the upper left side of the lower clamp 2. Depending on the needs, the wire end clamping groove can be a U-shaped groove, a rectangular groove, a semi-circular groove, or an arc-shaped groove, etc.

[0028] In this embodiment, the insulating clamp is used not only for the insulation of the wire ends during the replacement of the electricity meter 13, but also for the insulation of the wire ends during low-voltage secondary side live-line work in scenarios such as distribution box maintenance and cable splicing. The size of the wire end clamp groove can be set according to the outer diameter of the wire end (i.e. the outer diameter of the wire core). The insulating clamp can be used for the insulation of wire ends with a wire diameter between 0.5 mm and 10 mm.

[0029] To achieve insulation, both the upper clamp 1 and the lower clamp 2 are made of insulating materials available in the prior art. Alternatively, an insulating layer can be applied to the surface of the clamps, such as through plastic coating or rubber application. In this embodiment, both the upper clamp 1 and the lower clamp 2 are insulating plastic parts, which can be integrally molded by injection molding or die casting. The elastic reset component can be implemented using compression springs or torsion springs available in the prior art. The compression spring can be installed between the right side of the upper clamp 1 and the right side of the lower clamp 2, with its two ends fixedly connected to the corresponding positions on the lower right side of the upper clamp 1 and the upper right side of the lower clamp 2, respectively. The elastic reset component can also be implemented using other elastic material components available in the prior art, such as rubber pillars or spring sheets.

[0030] During use, to facilitate the differentiation of the phase and input / output sequence of each wire, corresponding marking symbols can be printed or engraved on the surface of the upper clamp 1 or the lower clamp 2.

[0031] In use, disconnect the wires connected to the electricity meter 13 one by one. For each disconnected wire, locate the corresponding marked insulating clip. After locating the clip, simultaneously press the right side of both the upper clip 1 and the lower clip 2 to open their left ends. Then, place the wire end into the clip slot. Release the upper clip 1; under the elastic restoring force of the elastic reset component, the upper clip 1 automatically rotates back to its original position, and the two clip slots close together. The upper clip 1 and lower clip 2 then open from the top. The upper and lower clamps completely enclose the wire ends in the two directions. Under the elastic pre-tightening force of the elastic reset component, the upper clamp 1 and the lower clamp 2 tightly clamp the wire ends through the wire end clamping groove, thereby firmly clamping the insulating clamp on the outside of the wire ends and completely enclosing the exposed wire ends to achieve insulation of the wire ends. The blind end 3 at the rear end of the wire end clamping groove can limit the wire ends to prevent the wire ends from being exposed outside the upper clamp 1 and the lower clamp 2, thus avoiding the risk of electric shock to maintenance personnel and short circuit between conductors.

[0032] The pre-tightening force of the elastic reset component enables the insulating clamp to have a certain elastic clamping force, which allows it to be firmly clamped to the wire end. The clamping is reliable and will not loosen or shift, thus ensuring the insulation of the wire end during meter replacement and avoiding other safety problems that may be caused by the loosening of the insulating clamp.

[0033] This invention features a reasonable and compact structure, simple operation, and allows for immediate disassembly and clamping, significantly improving the efficiency of meter replacement. The insulating clamp is convenient and reusable, more economical and environmentally friendly than disposable insulating tape, reducing usage costs, preventing secondary pollution or insulation failure, and addressing the issue of maintenance personnel taking shortcuts and violating regulations. The insulating clamp completely covers exposed wire ends, preventing electric shock and short circuits, ensuring stable insulation performance that won't age or detach due to environmental factors, providing reliable insulation protection during meter replacement. The pre-tightening force of the elastic reset component provides the insulating clamp with a certain elastic clamping force, firmly holding the wire ends without loosening, shifting, or detaching, guaranteeing reliable insulation of the wire ends during meter replacement, preventing safety accidents caused by insulation failure, and protecting the lives of maintenance personnel, equipment safety, and grid stability. In emergency repairs or batch meter replacement scenarios, it can significantly shorten equipment downtime and effectively improve power supply service response speed.

[0034] The insulating clips used for live replacement of electricity meters can be further optimized and / or improved according to actual needs: Example 2: As an optimization of the above examples, as shown in the appendix Figures 1 to 3 As shown, two insulating half-sleeves 4 with opposite openings are installed in the two wire end clamping grooves. After the two insulating half-sleeves 4 are fastened together, they form an insulating sleeve with an axially hollow inner cavity 5, and the inner diameter of the insulating sleeve is slightly smaller than the outer diameter of the wire end.

[0035] In the above technical solution, the insulating half-sleeve 4 can be integrally formed with the upper clamp 1 or the lower clamp 2 by a mold, or it can be installed in the corresponding wire end clamping groove by means of bonding, snap-fit, etc. The insulating half-sleeve 4 can be made of insulating materials with good insulation performance and a certain degree of elasticity in the prior art, such as rubber, polyurethane, etc., so as to better clamp the wire end and prevent the insulating clamp from loosening. The shape of the insulating half-sleeve 4 is adapted to the shape of the wire end clamping groove. In this embodiment, both wire end clamping grooves can be semi-circular clamping grooves, and both insulating half-sleeves 4 can be semi-circular insulating sleeves. After the two semi-circular insulating sleeves are fastened together, they form a circular tube, and the inner diameter of the circular tube is slightly smaller than the outer diameter of the wire end.

[0036] Because the inner diameter of the insulating sleeve is slightly smaller than the outer diameter of the wire end, under the elastic force of the elastic reset element, the wire end can cause elastic deformation of the inner wall of the insulating sleeve, allowing the two insulating half-sleeves 4 to better grip the wire end and prevent the insulating clamp from falling off or loosening. To achieve a better clamping effect, the flat sections of the two insulating half-sleeves 4 can protrude slightly from the top surface of the corresponding wire end clamping groove.

[0037] Example 3: As an optimization of Example 2, the insulating sleeve has at least four different colors to distinguish the phase of each wiring.

[0038] In the above technical solution, the color of the insulating clip can be yellow, green, red, black, or blue, yellow-green, etc., corresponding to the U, V, W three-phase or A, B, C three-phase, neutral line, and ground line of the wiring respectively.

[0039] With this setup, maintenance personnel can quickly identify the phase corresponding to each wiring by intuitively judging from the color of the insulating half-set 4, avoiding incorrect wiring problems caused by phase confusion, ensuring the accuracy of wiring, reducing equipment damage or metering errors caused by incorrect wiring, reducing workload, greatly improving the efficiency of meter replacement, and enabling the insulating clamp to have the function of color-coded identification of wiring phases.

[0040] During use, the insulating clip does not require wrapping and removing like insulating tape. It is simple and quick to operate. It takes about 30 seconds for skilled personnel to use insulating tape to wrap and seal exposed wire ends, but only about 5 seconds to use the insulating clip. This saves about 83% of the time cost and greatly improves the efficiency of meter replacement work. The advantage is even more obvious when replacing meters in batches.

[0041] Example 4: As an optimization of the above embodiments, as shown in the appendix Figures 1 to 4As shown, the lower left side of the upper clamping body 1 and the upper left side of the lower clamping body 2 are rotatably mounted together through a hinge. The hinge includes an upper ear plate 6, a lower ear plate 7, and a hinge shaft 8. Lower ear plates 7 are installed on the upper left front side and the rear left front side of the lower clamping body 2. Two upper ear plates 6 are rotatably mounted between the two lower ear plates 7 through the hinge shaft 8. The two upper ear plates 6 are spaced apart front and back, and their upper ends are respectively mounted together with the corresponding positions on the lower left side of the upper clamping body 1.

[0042] In the above technical solution, the upper ear plate 6 and the lower ear plate 7 can be fixedly installed together with the upper clamping body 1 and the lower clamping body 2 respectively by means of hot melt welding, bonding or injection molding. Among them, the front side of the upper ear plate 6 located at the front is in contact with the rear side of its corresponding lower ear plate 7 or has a small gap, and the rear side of the upper ear plate 6 located at the rear is in contact with the front side of its corresponding lower ear plate 7 or has a small gap, so as to avoid misalignment or shaking of the upper clamping body 1 and the lower clamping body 2, which would affect the normal use of the insulating clamp.

[0043] As required, both the upper ear plate 6 and the lower ear plate 7 are provided with mounting holes that are compatible with the hinge shaft 8.

[0044] Example 5: As an optimization of Example 4, as shown in the appendix Figures 1 to 4 As shown, the elastic reset component is a torsion spring 9, which is mounted on a hinge shaft 8 located between the two upper ear plates 6. The upper support leg 10 of the torsion spring 9 abuts against the corresponding position on the lower right side of the upper clamping body 1, and the lower support leg 11 of the torsion spring 9 abuts against the corresponding position on the upper right side of the lower clamping body 2.

[0045] In the above technical solution, the torsion spring 9 has the advantages of compact structure, good stability, lightweight and durable, which makes the structure of the present invention more compact, the clamping force more stable and the service life longer.

[0046] Example 6: As an optimization of the above embodiments, as shown in the appendix Figures 3 to 5 As shown, the upper left side of the upper clamp 1 is provided with a marking part 12 to distinguish and identify the wire sequence and phase of each wire.

[0047] In the above technical solutions, low-voltage power transmission typically uses a three-phase four-wire system (three phase wires + neutral wire) or a three-phase five-wire system (with an added ground wire), where the phase wires are divided into three phases A, B, and C or three phases U, V, and W. To identify the phase corresponding to each connection and to indicate whether the connection is an incoming or outgoing line (i.e., the wire sequence), the identification symbols on the identification unit 12 can use at least two types, including numbers, letters, and symbols. For example, numbers can be used to identify the phase, letters can be used to identify the wire sequence (incoming / outgoing line), such as IN / OUT, I / O, etc., and symbols can be + or - to identify the wire sequence (incoming / outgoing line), etc.

[0048] In this embodiment, the phases are identified by the numbers 1, 2, and 3, and the incoming / outgoing lines are identified by + and -. The incoming and outgoing lines of the three phases U, V, and W, or the three phases A, B, and C, correspond to 1+, 1-, 2+, 2-, 3+, and 3-, respectively. The neutral line or zero line is identified by N. Figure 5 As shown, the wiring corresponding to the insulating clip marked 1+ is the same as the wiring corresponding to the insulating clip marked 1- is the same as the wiring corresponding to the insulating clip marked 1- is the same as the wiring corresponding to the insulating clip marked 2+ is the same as the wiring corresponding to the insulating clip marked 2- is the same as the wiring corresponding to the insulating clip marked 2- is the same as the wiring corresponding to the insulating clip marked 3+ is the same as the wiring corresponding to the insulating clip marked 3- ...

[0049] With this setup, maintenance personnel can quickly identify the phase of the wire being clamped by checking the markings on the corresponding insulating clamps, and determine whether the wire is an incoming or outgoing line. This avoids incorrect wiring caused by confusion in phase or wire sequence, ensuring wiring accuracy and reducing equipment damage or metering errors caused by incorrect wiring.

[0050] Furthermore, the use of symbols to identify the phase of the corresponding wiring makes this invention easier for maintenance personnel who are colorblind or color-weak to use.

[0051] Example 7: As an optimization of the above example, both the upper clamp 1 and the lower clamp 2 are made of fluorescent material.

[0052] With this setup, in dim or low-light environments, maintenance personnel can quickly determine the phase of the insulating clamp and the phase of the wiring it holds by the light emission color according to this invention, ensuring the accuracy of the wiring and reducing equipment damage or measurement errors caused by incorrect wiring.

[0053] Depending on the requirements, the colors of the upper clamp 1 and the lower clamp 2 may include, but are not limited to, fluorescent yellow, fluorescent green, fluorescent red and fluorescent black, corresponding to the U, V, W three-phase or A, B, C three-phase wiring and the neutral line, respectively.

[0054] Example 8: As an optimization of the above embodiments, as shown in the appendix Figures 1 to 5 As shown, both the upper clamp 1 and the lower clamp 2 are T-shaped. The head of the T-shape is the clamp 101 / 201, and the rest is the handle 102 / 202. The length of the clamp 101 / 201 is greater than the width of the handle 102 / 202.

[0055] By setting it up in this way, the length of the clamp 101 / 201 can be much larger than the width of the handle 102 / 202. This not only extends the clamping length of the clamp 101 / 201 to match the length of the wire end, but also reduces the overall size of the handle 102 / 202, making it easier to clamp and use, while also reducing the overall weight of the invention.

[0056] Example 9: As an optimization of the above embodiment, anti-slip parts are provided on the upper right side of the upper clamp 1 and the lower right side of the lower clamp 2.

[0057] This design effectively prevents slippage when pressing the clamp handle 102 / 202. Depending on requirements, the anti-slip surface can be achieved through anti-slip patterns, such as diamond patterns, longitudinal stripes, or dotted protrusions, or by using an anti-slip layer, such as a rubber or silicone anti-slip layer.

[0058] Example 10: As an optimization of the above embodiment, the lower clamp 2 is provided with a through hole at the right end.

[0059] During use, an insulating rope can be threaded through the round hole to connect multiple of the present inventions together with key rings, quick hooks, etc., forming a set of insulating clips. Each set of insulating clips can include at least 8 insulating clips, including those numbered 1+, 1-, 2+, 2-, 3+, 3-, two N, etc. Using them in sets makes the present inventions easier to carry and less likely to be lost.

[0060] The above technical features constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. An insulating clamp for replacing an electricity meter while it is energized, characterized in that... The device includes an upper clamp and a lower clamp. The lower left side of the upper clamp and the upper left side of the lower clamp are rotatably mounted together. The lower left side of the upper clamp and the upper left side of the lower clamp are provided with wire end clamping grooves with opposite openings. The front ends of both wire end clamping grooves are open to allow wire ends to pass through. The rear ends of both wire end clamping grooves are blind ends to prevent wire ends from passing through. An elastic reset member is provided on the other side of the upper and lower clamps opposite to the direction of the wire end clamping grooves. Under the pre-tightening force of the elastic reset member, the lower left side of the upper clamp and the upper left side of the lower clamp are always abutting each other.

2. The insulating clip for live replacement of an energy meter according to claim 1, characterized in that, Two insulating half-sleeves with opposite openings are installed in the two wire end clamping grooves. When the two insulating half-sleeves are fastened together, they form an insulating sleeve with an axial hollow inner cavity. The inner diameter of the insulating sleeve is slightly smaller than the outer diameter of the wire end. Or / and, the lower left side of the upper clamping body and the upper left side of the lower clamping body are rotatably mounted together through a hinge. The hinge includes an upper ear plate, a lower ear plate, and a hinge shaft. Lower ear plates are installed on the upper left front side and the rear left front side of the lower clamping body. Two upper ear plates are rotatably mounted between the two lower ear plates through the hinge shaft. The two upper ear plates are spaced apart front and back, and their upper ends are respectively mounted together with the corresponding positions on the lower left side of the upper clamping body.

3. The insulating clip for live replacement of an energy meter according to claim 2, characterized in that, The insulating sleeve has at least four different colors to distinguish the phases of each wiring; Or / and, the elastic reset element is a torsion spring, which is mounted on a hinge shaft located between the two upper ear plates. The upper leg of the torsion spring abuts against the corresponding position on the lower right side of the upper clamping body, and the lower leg of the torsion spring abuts against the corresponding position on the upper right side of the lower clamping body.

4. The insulating clip for live replacement of an energy meter according to claim 1, 2, or 3, characterized in that, The upper left side of the upper clamp is provided with a marking section, which includes at least two kinds of symbols to distinguish and identify the wire sequence and phase of each wire.

5. The insulating clip for live replacement of an energy meter according to claim 1, 2, or 3, characterized in that, Both the upper and lower clamps are made of fluorescent materials.

6. The insulating clip for live replacement of an energy meter according to claim 4, characterized in that, Both the upper and lower clamps are made of fluorescent materials.

7. The insulating clip for live replacement of an energy meter according to claim 1, 2, 3, or 6, characterized in that, Both the upper and lower clamps are T-shaped, with the head of the T-shape being the clamp head and the rest being the clamp handle. The length of the clamp head is greater than the width of the clamp handle.

8. The insulating clip for live replacement of an energy meter according to claim 4, characterized in that, Both the upper and lower clamps are T-shaped, with the head of the T-shape being the clamp head and the rest being the clamp handle. The length of the clamp head is greater than the width of the clamp handle.

9. The insulating clip for live replacement of an energy meter according to claim 5, characterized in that, Both the upper and lower clamps are T-shaped, with the head of the T-shape being the clamp head and the rest being the clamp handle. The length of the clamp head is greater than the width of the clamp handle.

10. The insulating clip for live replacement of an energy meter according to any one of claims 1 to 9, characterized in that, Anti-slip parts are provided on the upper right side of the upper clamping body and the lower right side of the lower clamping body; Or / and, the right end of the lower clamp has a through hole running vertically through it.

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