Safety device for accessing electric energy meter and operation method thereof

Abstract

The invention relates to the technical field of electric power facilities, and discloses a safety device connected to an electric energy meter and an operation method thereof. The safety device connected to the electric energy meter comprises a clamping mechanism and a protection mechanism, the clamping mechanism comprises a plastic clamping seat and two sets of wiring parts, a long hole is formed in the plastic clamping seat in a penetrating mode in the first direction, the length of the long hole extends in the second direction, and the two wiring parts are arranged in the long hole in a penetrating mode and can move in the first direction and the second direction; the protection mechanism is provided with two input ports and two output ports, the plastic clamping seat can be matched with the electric energy meter in an inserted mode, the wiring part is connected with the two input ports through electric leads, and when the plastic clamping seat is fixed to the electric energy meter, the wiring part is connected with the two output ports. The wiring part can move in the first direction, so that the second end protrudes out of the plastic clamping seat and is connected with two wiring terminals of the electric energy meter or the second end does not exceed the plastic clamping seat, and the two output ports are connected with an external testing instrument. The safety device can be stably and safely matched with wiring terminals of various electric energy meters.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power facilities, and in particular to a safety device connected to an electric energy meter and an operating method thereof. Background Art

[0002] With the widespread deployment of smart energy meters in power systems, the work of fault diagnosis has also increased sharply. This kind of work often relies on test instruments or operation and maintenance handheld devices, which are connected to the phase and neutral lines of the energy meter to achieve accurate data collection and in-depth analysis. At present, the industry generally uses wires with alligator clip terminals to establish connections with energy meters. These clamps are fixed to the wiring terminals of the energy meter through their jaws. However, this conventional practice hides risks that cannot be ignored: when the opening of the alligator clip is designed to be too narrow, the instability during the connection process may cause it to fall off accidentally, thereby increasing the risk of operators accidentally touching live parts and causing electric shock hazards; on the contrary, if the opening is designed to be too loose, it is possible for the clamp to touch the adjacent phase line and cause a phase-to-phase short circuit, which is a very destructive electrical fault that may be accompanied by sparks, high temperatures and even fires, posing a serious threat to the safety of personnel and equipment. In addition, given that the terminal screw sizes of different models of energy meters vary, a single specification of alligator clips obviously cannot meet all connection requirements. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to provide a safety device for connecting to an electric energy meter and an operating method thereof, wherein the device can stably and safely match the wiring terminals of various electric energy meters, thereby improving the safety of operators and improving the efficiency and accuracy of troubleshooting.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] On the one hand, a safety device for accessing an electric energy meter is provided, comprising a clamping mechanism and a protection mechanism, the clamping mechanism comprising a plastic clamp seat and two groups of wiring parts, the plastic clamp seat having a long hole extending through it along a first direction, the length of the long hole extending along a second direction, the two wiring parts being inserted through the long hole and being movable along the first direction and the second direction, the protection mechanism being provided with two input ports and two output ports, the wiring part having a first end and a second end along the first direction, the plastic clamp seat being capable of being plugged into and matched with the electric energy meter so that the second end of the wiring part faces the wiring terminal on the electric energy meter, the first end being connected to the two input ports in a one-to-one correspondence through a conductive wire, and when the plastic clamp seat is fixed on the electric energy meter, the wiring part being capable of being moved along the first direction so that the second end protrudes from the plastic clamp seat and is connected to the two wiring terminals of the electric energy meter or the second end does not exceed the plastic clamp seat, the two output ports being connected to an external testing instrument, and the first direction being perpendicular to the second direction.

[0006] As a further solution of the safety device for connecting to the electric energy meter, the wiring part includes a wiring handle, a connecting rod, a spring, a wiring pointer and a fixed cylinder. The fixed cylinder is installed in the long hole and slidably cooperates with the long hole through a sliding assembly, and the fixed cylinder can slide relative to the plastic clamp seat along the second direction; the length of the connecting rod extends along the first direction, one end of the connecting rod is connected to the wiring handle exposed from the plastic clamp seat, and the other end passes through the inner hole of the fixed cylinder and is connected to the wiring pointer. The spring is sleeved on the outer periphery of the connecting rod and is located between the fixed cylinder and the wiring pointer. When the wiring handle is moved along the first direction, the wiring handle can drive the wiring pointer to move along the first direction through the connecting rod. The wiring handle is connected to the two input ports one by one through a conductive wire, and the wiring pointer is connected to the wiring terminal of the electric energy meter.

[0007] As a further solution for the safety device connected to the electric energy meter, when the spring is in a natural state, the wiring pointer part protrudes from the plastic clamp seat.

[0008] As a further solution for the safety device connected to the electric energy meter, the sliding assembly includes a slide groove and a slider. The long hole is respectively provided with a slide groove on two opposite side walls along the third direction. The length of the slide groove extends along the second direction. The outer periphery of the fixed cylinder is provided with two sliders corresponding to the slide groove one by one. The slider extends into the slide groove, and the fixed cylinder slides with the slide groove through the slider. The first direction, the second direction and the third direction are perpendicular to each other.

[0009] As a further solution for the safety device connected to the electric energy meter, the end of the wiring pointer away from the connecting rod is a conical structure.

[0010] As a further solution for the safety device connected to the electric energy meter, a plurality of protrusions are arranged on the outside of the wiring pointer adjacent to the conical structure ring.

[0011] As a further solution of the safety device connected to the electric energy meter, the shell of the protection mechanism has a front side and a back side, the input port and the output port are located on the front side, and the protection mechanism also includes a suction cup, which is installed on the back side, and the protection mechanism can be adsorbed and connected to the electric energy meter through the suction cup.

[0012] As a further solution for the safety device connected to the electric energy meter, the protection mechanism also includes a voltage indicator, an operation indicator light and an alarm indicator light arranged on the front side.

[0013] As a further solution for the safety device connected to the electric energy meter, the plastic clamp seat is a transparent structure.

[0014] On the other hand, a method for operating the safety device connected to the electric energy meter is provided, comprising:

[0015] According to the positions of the two wiring terminals of the electric energy meter, the positions of the two wiring parts are adjusted along the second direction, and the plastic clamping seat of the clamping mechanism is plugged and fixed to the electric energy meter, so that the two wiring parts are connected to the two wiring terminals of the electric energy meter;

[0016] Fixing the protection mechanism on one side of the electric energy meter, and connecting the input port of the protection mechanism and one end of the wiring portion away from the wiring terminal of the electric energy meter by a conductive wire;

[0017] The output port of the protection mechanism is connected to an external testing instrument.

[0018] Beneficial effects:

[0019] When the safety device for accessing the electric energy meter of the present invention is used in practice, the operator can adjust the position of the wiring part according to the position and interval of the two wiring terminals of the electric energy meter, so that the two wiring parts can be accurately and stably inserted into the two wiring terminals of the electric energy meter to achieve electrical connection, so as to adapt to the calibration and test environment of different types of smart electric energy meters for access; the clamping mechanism is connected to the external test instrument through the protection mechanism to test the electric energy meter. After the plastic clamp is plugged and fixed to the electric energy meter, the wiring part can be stably connected to the wiring terminal during the test, avoiding accidental loosening and increasing the risk of operators accidentally touching live parts, avoiding the risk of electric shock, improving the safety of operators, and improving the efficiency and accuracy of troubleshooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the structure of the safety device connected to the electric energy meter according to an embodiment of the present invention.

[0022] Figure 2 It is a schematic structural diagram of the clamping mechanism described in an embodiment of the present invention.

[0023] Figure 3 It is a structural schematic diagram of the wiring part described in an embodiment of the present invention.

[0024] Figure 4 It is a schematic diagram of the structure of the protection mechanism described in an embodiment of the present invention.

[0025] In the figure:

[0026] 100, clamping mechanism; 110, plastic clamp seat; 111, long hole; 112, slide groove; 120, wiring part; 121, wiring handle; 122, connecting rod; 123, spring; 124, wiring pointer; 1241, conical structure; 1242, protrusion; 125, fixing cylinder; 126, slider;

[0027] 200, protection mechanism; 201, front; 202, back; 210, input port; 220, output port; 230, suction cup; 240, voltage indicator; 250, operation indicator light; 260, alarm indicator light. DETAILED DESCRIPTION

[0028] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, if the terms "upper", "lower", "left", "right" and other directions or positional relationships appear, they are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, if the terms "first", "second", etc. appear, they are only used to distinguish in the description and have no special meaning.

[0032] like Figures 1 to 4 As shown, the safety device for connecting to an electric energy meter in this embodiment includes a clamping mechanism 100 and a protection mechanism 200. The clamping mechanism 100 includes a plastic clamping seat 110 and two sets of wiring parts 120. The plastic clamping seat 110 is provided with a long hole 111 extending along a first direction. The length of the long hole 111 extends along a second direction. The two wiring parts 120 are inserted into the long hole 111 and can move along the first direction and the second direction. The protection mechanism 200 is provided with two input ports 210 and two output ports 220. The wiring part 120 has a first end 210 along the first direction. The plastic clamp 110 can be plugged into and matched with the electric energy meter so that the second end of the wiring part 120 faces the wiring terminal on the electric energy meter, and the first end is connected to the two input ports 210 one by one through a conductive wire. When the plastic clamp 110 is fixed on the electric energy meter, the wiring part 120 can move along the first direction so that the second end protrudes from the plastic clamp 110 and is connected to the two wiring terminals of the electric energy meter or the second end does not exceed the plastic clamp 110, and the two output ports 220 are connected to an external testing instrument, and the first direction is perpendicular to the second direction.

[0033] In this embodiment, the electric energy meter is not shown in the figure. The electric energy meter is a commonly used electric energy meter, and a positioning groove is provided on its outer periphery. The plastic clamp seat 110 can be plugged into and matched with the positioning groove so that the second end of the wiring portion 120 faces the wiring terminal of the electric energy meter. After adjusting the position of the wiring portion 120, the second end of the wiring portion 120 can be electrically connected to the wiring terminal of the electric energy meter.

[0034] In other embodiments, two clamping plates (not shown in the figure) are spaced apart on the outer periphery of the plastic clamp base 110. The two clamping plates protrude from one side of the plastic clamp base 110 and form a plug-in slot, into which the electric energy meter can be inserted to fix the plastic clamp base 110 on the electric energy meter.

[0035] Although the structural design of the electric energy meter and its positioning groove and the clamping plate on the plastic clamp seat 110 in the above embodiment is not shown in the figure, those skilled in the art can easily obtain it based on the description of this embodiment, and other technical means that can make the two mutually clamped to achieve relative fixation are applicable to the present invention.

[0036] In this embodiment, two wiring parts 120 are inserted into the long hole 111. When the two wiring parts 120 move along the second direction (the Y direction in the figure), the positions of the two wiring parts 120 along the second direction can be adjusted according to the positions of the two wiring terminals of the electric energy meter, so that the two wiring parts 120 can correspond to the two wiring terminals one by one; then the two wiring parts 120 are adjusted along the first direction (the X direction in the figure), so that the end (the second end) of the wiring part 120 connected to the wiring terminal of the electric energy meter protrudes from the outside of the plastic clamp seat 110 and is connected to the wiring terminal. When the plastic clamp seat 110 needs to be removed, the wiring part 120 is moved along the first direction to separate the second end from the wiring terminal, and then the plastic clamp seat 110 is removed.

[0037] Among them, the positioning groove is provided by the electric energy meter. The plastic clamp seat 110 of this embodiment is designed according to the structure of the positioning groove, and can achieve stable plug-in cooperation with the positioning groove on the electric energy meter, and is convenient for disassembly, and the details are not repeated here.

[0038] When the safety device for accessing the electric energy meter of this embodiment is actually used, the operator can adjust the position of the wiring part 120 according to the position and interval of the two wiring terminals of the electric energy meter, so that the two wiring parts 120 can be accurately and stably inserted into the two wiring terminals of the electric energy meter to achieve electrical connection, so as to adapt to the calibration and test environment of different types of smart electric energy meters for access; the clamping mechanism 100 is connected to the external test instrument through the protection mechanism 200 to test the electric energy meter. After the plastic clamp 110 is fixed to the electric energy meter, the wiring part 120 can be stably connected to the wiring terminal during the test, avoiding accidental loosening and increasing the risk of the operator accidentally touching the live parts, avoiding the hidden danger of electric shock, improving the safety of the operator, and improving the efficiency and accuracy of troubleshooting.

[0039] Furthermore, if Figure 3 As shown, the wiring part 120 includes a wiring handle 121, a connecting rod 122, a spring 123, a wiring pointer 124 and a fixed cylinder 125. The fixed cylinder 125 is installed in the long hole 111 and slidably cooperates with the long hole 111 through a sliding assembly. The fixed cylinder 125 can slide relative to the plastic clamp seat 110 along the second direction; the length of the connecting rod 122 extends along the first direction, one end of the connecting rod 122 is connected to the wiring handle 121 exposed to the plastic clamp seat 110, and the other end passes through the inner hole of the fixed cylinder 125 and is connected to the wiring pointer 124. The spring 123 is sleeved on the outer periphery of the connecting rod 122 and is located between the fixed cylinder 125 and the wiring pointer 124. When the wiring handle 121 is moved along the first direction, the wiring handle 121 can drive the wiring pointer 124 to move along the first direction through the connecting rod 122. The wiring handle 121 is connected to the two input ports 210 one by one through a conductive wire, and the wiring pointer 124 is connected to the wiring terminal of the electric energy meter.

[0040] It can be understood that the fixed cylinder 125 slides with the inner wall of the long hole 111 along the second direction through the sliding assembly, and the sliding assembly can limit the position of the fixed cylinder 125 along the first direction to prevent the fixed cylinder 125 from moving along the first direction. The wiring handle 121 is connected to the wiring pointer 124 through the connecting rod 122 that penetrates the fixed cylinder 125. The spring 123 is sleeved on the outer periphery of the connecting rod 122 and is located between the fixed cylinder 125 and the wiring pointer 124. By pulling the wiring handle 121 outward along the first direction, the wiring pointer 124 can be driven by the connecting rod 122 to overcome the force of the spring 123 and move toward the direction close to the fixed cylinder 125. The wiring pointer 124 can be moved to not protrude from the plastic clamp seat 110 according to actual needs, so as to facilitate the plug-in cooperation between the plastic clamp seat 110 and the positioning groove; after the plastic clamp seat 110 is plugged into the positioning groove, the wiring handle 121 is released, and the wiring pointer 124 moves in the direction away from the fixed cylinder 125 under the driving action of the spring 123 until it is stuck in the wiring terminal. When the test is completed and the plastic clamp 110 needs to be removed, the wiring handle 121 is pulled outward to separate the wiring finger 124 from the wiring terminal, and then the plastic clamp 110 is removed.

[0041] The outer peripheral side of the wiring handle 121 protrudes from the outer peripheral side of the connecting rod 122, so as to facilitate pulling the wiring handle 121 outward.

[0042] In this embodiment, when the spring 123 is in a natural state, that is, the spring 123 is in a non-extruded state (the extruded state refers to the state of the spring 123 when the wiring pointer 124 is connected to the wiring terminal) or a non-stretched state (the non-stretched state refers to the state of the spring 123 when the wiring handle 121 is pulled outward), the wiring pointer 124 partially protrudes from the plastic clamp seat 110, so that when the wiring pointer 124 is connected to the wiring terminal, the spring 123 makes the wiring pointer 124 always have a tendency to move toward the wiring terminal, thereby improving the connection stability between the wiring pointer 124 and the wiring terminal.

[0043] Furthermore, the sliding assembly includes a slide groove 112 and a slider 126. A slide groove 112 is respectively provided on two opposite side walls of the long hole 111 along the third direction. The length of the slide groove 112 extends along the second direction. Two sliders 126 corresponding to the slide groove 112 are provided on the outer periphery of the fixed cylinder 125. The slider 126 extends into the slide groove 112. The fixed cylinder 125 slides with the slide groove 112 through the slider 126. The first direction, the second direction and the third direction are perpendicular to each other.

[0044] In this embodiment, a slide groove 112 is respectively provided on two opposite side walls of the long hole 111 along the third direction (Z direction as shown in the figure), and a slider 126 is respectively provided on both sides of the fixing cylinder 125 along the third direction, so that a sliding connection between the fixing cylinder 125 and the plastic clamp seat 110 along the second direction can be achieved.

[0045] Furthermore, the end of the wiring pointer 124 away from the connecting rod 122 is a conical structure 1241. By designing the end of the wiring pointer 124 away from the connecting rod 122 as a conical structure 1241, it is convenient for the wiring pointer 124 to be smoothly inserted into the corresponding wiring terminal. When adjusting the position of the wiring portion 120 along the second direction, it is difficult to completely align the wiring pointer 124 with the wiring terminal, and there will be some deviations. The design of the conical structure 1241 can enable the wiring pointer 124 to automatically align with the wiring terminal through the action of the spring 123 during the connection process with the wiring terminal to achieve precise connection.

[0046] Furthermore, a plurality of protrusions 1242 are disposed around the outside of the connection finger 124 adjacent to the conical structure 1241. The structural design of the protrusions 1242 serves to improve the connection stability between the connection finger 124 and the connection terminal.

[0047] In this embodiment, the housing of the protection mechanism 200 has a front side 201 and a back side 202, the input port 210 and the output port 220 are located on the front side 201, and the protection mechanism 200 further includes a suction cup 230, such as Figure 4 As shown, the suction cup 230 is installed on the back side 202 of the protection mechanism 200 , and the protection mechanism 200 can be adsorbed and connected to the electric energy meter through the suction cup 230 .

[0048] Specifically, the protection mechanism 200 is fixed on the upper cover of the electric energy meter by suction through the suction cup 230, so that the protection mechanism 200 is adjacent to the clamping mechanism 100, and it is convenient to use an electric wire to connect the input port 210 of the protection mechanism 200 and the first end of the wiring portion 120 of the clamping mechanism 100. Of course, the protection mechanism 200 is not limited to being fixed on the housing of the electric energy meter by the suction cup 230, and can also be fixed by suction on other plane positions adjacent to the clamping mechanism 100, which can be determined according to actual conditions.

[0049] Furthermore, the protection mechanism 200 further includes a voltage indicator 240, an operation indicator light 250, and an alarm indicator light 260 arranged on the front 201. The voltage indicator 240 is used to display the voltage of the electric energy meter. At the calibration and fault diagnosis site, the voltage indicator 240, the operation indicator light 250, and the alarm indicator light 260 can display the voltage level and the operating status of the device in real time, and convey instant information to the operator through visual signals to prevent potential dangers.

[0050] Furthermore, the plastic clamp 110 of this embodiment is a transparent structure. By designing the plastic clamp 110 as a transparent structure, this unique design not only allows the operator to visually observe and verify the correctness of the wiring, but also effectively blocks potential electrical hazards, such as arcs, high temperatures and even fire accidents that may be caused by phase short circuits, providing a solid barrier for the safety of operators and equipment.

[0051] In this embodiment, the protection mechanism 200 also includes an internal circuit structure. The input port 210, the output port 220, the voltage indicator 240, the operation indicator light 250 and the alarm indicator light 260 are all connected to the internal circuit structure to realize corresponding functions. The internal circuit structure is a conventional technical means in this field and will not be described in detail.

[0052] This embodiment further provides an operation method of the safety device connected to the electric energy meter of the above embodiment, including:

[0053] Adjust the positions of the two connection parts 120 according to the positions of the two connection terminals of the electric energy meter, plug and fix the plastic clamping seat 110 of the clamping mechanism 100 with the electric energy meter, so that the two connection parts 120 are connected to the two connection terminals of the electric energy meter;

[0054] The protection mechanism 200 is fixed on one side of the electric energy meter, and the input port 210 of the protection mechanism 200 and one end of the wiring part 120 away from the wiring terminal of the electric energy meter are connected by a conductive wire;

[0055] The output port 220 of the protection mechanism 200 is connected to an external test instrument.

[0056] Based on the structure in the above embodiment where the wiring portion 120 includes a wiring handle 121, a connecting rod 122, a spring 123, a wiring pointer 124 and a fixing cylinder 125 and the structure where the protection mechanism 200 is provided with a suction cup 230, a specific operation method of this embodiment is as follows:

[0057] First, adjust the positions of the two wiring portions 120 along the second direction according to the positions of the two wiring terminals of the electric energy meter;

[0058] Then pull the wiring handle 121 outward to make the wiring pointer 124 completely retract into the long hole 111, and then insert the plastic clamp seat 110 into the positioning groove;

[0059] Then, the wiring handle 121 is released, and the wiring pointer 124 is automatically inserted into the wiring terminal of the electric energy meter;

[0060] Finally, the suction cup 230 of the protection mechanism 200 is fixed on the upper cover of the electric energy meter by suction, and the wiring handle 121 and the input port 210 of the protection mechanism 200 are connected by conductive wire, and the output port 220 of the protection mechanism 200 and the external test instrument are connected to complete the installation.

[0061] In other embodiments, when the plastic clamp 110 is a transparent structure, the plastic clamp 110 can be first plugged into the positioning groove of the electric energy meter, and then the wiring handle 121 can be pulled outward to adjust the position of the wiring part 120 according to the position of the wiring terminal observed on the electric energy meter. After the wiring pointer 124 is aligned with the wiring terminal, the wiring handle 121 can be released to complete the wiring operation.

[0062] Alternatively, when the terminal does not protrude from the plane where it is located, there is no need to pull the wiring handle 121 outward, and the position of the wiring portion 120 can be directly adjusted along the second direction. When the wiring portion 120 moves to the end of the conical structure 1241 and moves to the edge of the terminal, the wiring pointer 124 of the wiring portion 120 can be automatically inserted into the terminal under the action of the spring 123.

[0063] When it is necessary to remove the plastic clamp 110, first disconnect the conductive wires, remove the protective mechanism 200, then pull the wiring handle 121 outwards, and remove the plastic clamp 110. The operation is very convenient.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A safety device connected to an electric energy meter, characterized in that: It includes a clamping mechanism and a protection mechanism, the clamping mechanism includes a plastic clamp seat and two groups of wiring parts, the plastic clamp seat is penetrated by a long hole along the first direction, the length of the long hole extends along the second direction, the two wiring parts are inserted into the long hole and can move along the first direction and the second direction, the protection mechanism is provided with two input ports and two output ports, the wiring part has a first end and a second end along the first direction, the plastic clamp seat can be plugged and matched with the electric energy meter so that the second end of the wiring part faces the wiring terminal on the electric energy meter, the first end is connected to the two input ports one by one through a conductive wire, when the plastic clamp seat is fixed on the electric energy meter, the wiring part can move along the first direction so that the second end protrudes from the plastic clamp seat and is connected to the two wiring terminals of the electric energy meter or the second end does not exceed the plastic clamp seat, the two output ports are connected to an external testing instrument, and the first direction is perpendicular to the second direction.

2. The safety device for accessing an electric energy meter according to claim 1, characterized in that: The wiring part includes a wiring handle, a connecting rod, a spring, a wiring pointer and a fixed cylinder, the fixed cylinder is installed in the long hole and slidably cooperates with the long hole through a sliding assembly, and the fixed cylinder can slide relative to the plastic clamp seat along the second direction; the length of the connecting rod extends along the first direction, one end of the connecting rod is connected to the wiring handle exposed from the plastic clamp seat, and the other end passes through the inner hole of the fixed cylinder and is connected to the wiring pointer, the spring is sleeved on the outer periphery of the connecting rod and is located between the fixed cylinder and the wiring pointer, when the wiring handle is moved along the first direction, the wiring handle can drive the wiring pointer to move along the first direction through the connecting rod, the wiring handle is connected to the two input ports one by one through a conductive wire, and the wiring pointer is connected to the wiring terminal of the electric energy meter.

3. The safety device for accessing an electric energy meter according to claim 2, characterized in that: When the spring is in a natural state, the wiring pointer portion protrudes from the plastic clamp seat.

4. The safety device for accessing an electric energy meter according to claim 2, characterized in that: The sliding assembly includes a sliding groove and a slider. The two opposite side walls of the long hole along the third direction are respectively provided with a sliding groove. The length of the sliding groove extends along the second direction. The outer periphery of the fixed cylinder is provided with two sliders corresponding to the sliding groove one by one. The slider extends into the sliding groove. The fixed cylinder is slidably matched with the sliding groove through the slider. The first direction, the second direction and the third direction are perpendicular to each other.

5. The safety device for accessing an electric energy meter according to claim 2, characterized in that: The end of the wiring pointer away from the connecting rod is a conical structure.

6. The safety device for accessing an electric energy meter according to claim 5, characterized in that: A plurality of protrusions are arranged on the outside of the wiring pointer adjacent to the conical structure ring.

7. The safety device for connecting to an electric energy meter according to any one of claims 1 to 6, characterized in that: The shell of the protection mechanism has a front side and a back side, the input port and the output port are located on the front side, and the protection mechanism also includes a suction cup, which is installed on the back side. The protection mechanism can be adsorbed and connected to the electric energy meter through the suction cup.

8. The safety device for accessing an electric energy meter according to claim 7, characterized in that: The protection mechanism also includes a voltage indicator, an operation indicator light and an alarm indicator light arranged on the front side.

9. The safety device for connecting to an electric energy meter according to any one of claims 1 to 6, characterized in that: The plastic clamping seat is a transparent structure.

10. An operating method for a safety device connected to an electric energy meter according to any one of claims 1 to 9, characterized in that: include: According to the positions of the two wiring terminals of the electric energy meter, the positions of the two wiring parts are adjusted along the second direction, and the plastic clamping seat of the clamping mechanism is plugged and fixed to the electric energy meter, so that the two wiring parts are connected to the two wiring terminals of the electric energy meter; Fixing the protection mechanism on one side of the electric energy meter, and connecting the input port of the protection mechanism and one end of the wiring part away from the wiring terminal of the electric energy meter by a conductive wire; The output port of the protection mechanism is connected to an external testing instrument.

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