Electric energy meter and use method thereof

Abstract

The invention discloses an electric energy meter and a using method thereof, and particularly relates to the technical field of electric energy meters, the electric energy meter comprises an electric energy meter body and a mounting groove formed in the electric energy meter body, a terminal strip is arranged in the mounting groove, a plurality of wiring holes are formed in one end, away from the mounting groove, of the terminal strip, and a plurality of groups of clamping assemblies are arranged in the terminal strip. Through the arrangement of the clamping assembly, the clamping piece and the conductive piece are separated by pulling out the adjusting block, the wire is fed between the clamping piece and the conductive piece through the wiring hole, the adjusting block is loosened to preliminarily fix the wire, and when the wire is powered on, the first conductive piece, the winding and the second conductive piece form a parallel circuit; therefore, the fixing column can generate magnetic force repellent to the magnetic block, the fixing column can push the magnetic block to move downwards, the clamping piece further applies larger clamping force to the wire, the risk of power failure or fire disasters caused by damage or looseness of the wire can be avoided, the stability of the electric energy meter is improved, and the service life of the electric energy meter is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy meters, and more particularly, to an electric energy meter and a method for using the same. Background Art

[0002] An electric energy meter is an instrument used to measure electrical energy, also known as an watt-hour meter, a fire meter, or a kilowatt-hour meter. It refers to an instrument that measures various electrical quantities. Due to its small size, high accuracy, good reliability, and easy installation, it is becoming more and more commonly used in industrial production and life.

[0003] The Chinese patent application number CN202410258009.6 discloses a terminal block for installing online diagnostic equipment for electric meters and its use method, which belongs to the field of terminal blocks. It includes an electric meter and a terminal block; the lower end of the electric meter is provided with a groove, and the terminal block is fixedly connected to the groove by two screws; the terminal block is connected to a threaded barrel through a bearing; the threaded barrel is sleeved on the outside of one of the screws; the upper and lower parts of the outer cylindrical surface of the threaded barrel are provided with reverse threads, and the outer side of the threaded barrel is respectively connected to a fastening device and a control device through threads with different rotation directions; the bottom end of the electric meter is fixedly connected to a movable device. This invention can not only prevent moisture and dust from entering and affecting the service life of the terminal block, but also effectively prevent the wires from being strung together by clamping the wires through the circular groove and the push plate, thereby avoiding short-circuit faults; at the same time, this invention can also install wires in batches by rotating the threaded barrel, thereby improving work efficiency.

[0004] While the aforementioned invention effectively prevents wire cross-connection and short-circuit failures by clamping the wires separately through circular grooves and push plates, the wiring terminals of electric energy meters typically secure the wires by tightening screws. This not only requires tools but also makes it impossible to determine the tightness between the screws and the wires. Overtightening can easily damage the wires, while loosening them can easily cause them to fall out of the wiring holes, potentially causing power outages or fires. When a wire short-circuit occurs in the terminal block, the current in the wires increases, potentially burning the electric energy meter, leading to power outages or the risk of fires caused by overheating of the wires.

[0005] The present invention provides an electric energy meter designed to address the problem of meters typically securing wires by tightening screws in their terminal blocks. This not only requires tools but also makes it impossible to determine the tightness of the screws and wires. Overtightening can easily damage the wires, while loosening them can easily cause them to fall out of the terminal holes, leading to power outages or fires. If a wire in the terminal block short-circuits, the current flowing through the wires can increase, potentially burning the meter, causing power outages, or overheating and fires. Summary of the Invention

[0006] The present invention aims to provide an electric energy meter that addresses the aforementioned background art problem of electric energy meter terminals typically securing wires by tightening screws. This requires tools and makes it impossible to determine the tightness between the screws and the wires. Overtightening can easily damage the wires, while loosening them can easily cause them to fall out of the wiring holes, leading to power outages or fires. When a wire in the terminal block shorts, the current flowing through the wires can increase, potentially burning the meter, causing power outages, or overheating the wires, leading to fires.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: an electric energy meter, comprising an electric energy meter body and a mounting slot provided on the electric energy meter body, a cover being installed on the mounting slot, a terminal block being provided in the mounting slot, a plurality of wiring holes being provided at one end of the terminal block away from the mounting slot, and electrical connection conductors being provided in the mounting slot in the same number and positions as the wiring holes;

[0008] A pressing groove is provided at the upper end of the terminal block, and adjustment grooves are provided in the pressing groove, the number of which is the same as and the positions of which are corresponding to the wiring holes. A first sliding groove is provided below each of the adjustment grooves, and a connecting hole is provided between the adjustment groove and the first sliding groove. Each of the first sliding grooves is connected to the corresponding wiring hole, and a clamping component is provided inside each of the first sliding grooves.

[0009] Preferably, the clamping assembly includes a clamping member, which is slidably connected in the corresponding first sliding groove, and the upper end of the clamping member is fixedly connected to a guide column, which is slidably connected in the connecting hole, and the end of the guide column away from the clamping member is fixedly connected to a magnetic block.

[0010] Preferably, an adjustment block is provided in the adjustment groove, a sliding chamber is opened in the adjustment block, the magnetic block is slidably connected in the sliding chamber, a fixed column is fixedly connected in the sliding chamber, and a winding is wound around the outer wall of the fixed column. The dynamic adjustment of the clamping force is achieved through the electromagnetic coupling between the winding on the fixed column and the magnetic block.

[0011] Preferably, a first conductive sheet and a second conductive sheet are provided at one end of the clamping member away from the guide column, and the first conductive sheet and the second conductive sheet are connected to the input and output wires of the winding on the outer wall of the fixing column.

[0012] Preferably, a first elastic member is connected between the adjusting block and the adjusting slot and is sleeved on the adjusting block and the outer wall of the guide column, and the first elastic member is used to provide a rebound force for the adjusting block.

[0013] Preferably, a conductive member is provided in the first sliding groove, a guide groove is provided on a side of the conductive member, and the guide groove is slidably connected to the clamping member.

[0014] Preferably, the end of the conductive part away from the clamping part is fixedly connected to a limiting column, a limiting opening is provided on the outer wall of the limiting column, the end of the limiting column away from the conductive part is fixedly connected to a second elastic part, and the other end of the second elastic part is connected to the first sliding groove.

[0015] Preferably, a protective component is provided on the side of the limiting column, and the protective component includes a plug-in block, one end of the plug-in block is in contact with the outer wall of the limiting column, and the other end of the plug-in block is fixedly connected to a guide rod, and the other end of the guide rod extends to the outside of the terminal block.

[0016] Preferably, the interior of the terminal block is provided with second sliding grooves having the same number and corresponding positions as the first sliding grooves, the outer wall of the guide rod is fixedly connected to a support plate which is slidably connected to the second sliding groove, and a third elastic member which is sleeved on the outer wall of the guide rod is connected between the support plate and the second sliding groove, and the third elastic member is used to provide thrust for the plug-in block.

[0017] A method for using an electric energy meter comprises the following steps:

[0018] S1. When wiring the energy meter, first open the cover and pull the adjustment block to separate the clamping part from the conductive part;

[0019] S2. Insert the wire into the wiring hole onto the conductive part, and loosen the adjustment block to close the clamping part and clamp the wire;

[0020] S3. After power is turned on, the fixed column generates a magnetic force that repels the magnetic block due to the winding, pushing the clamping part to increase the clamping force;

[0021] S4. When a short circuit occurs in the wire, the instantaneous current will exceed the normal current by several times, causing the fixing column to generate a greater magnetic force and push the limit column downward, allowing the plug-in block to be inserted into the limit opening, separating the conductive part from the electrical connection conductor;

[0022] S5. During maintenance, pull out the guide rod to allow the plug-in block to leave the limit opening, so that the conductive part returns to its original state. The wire can be pulled out of the wiring hole and replaced or repaired.

[0023] Technical effects and advantages of the present invention:

[0024] 1. Through the setting of the clamping assembly, the clamping part and the conductive part are separated by pulling out the adjustment block, and the wire is fed between the clamping part and the conductive part through the wiring hole. The adjustment block is then loosened to close the clamping part and the conductive part, so that the wire is initially fixed. When the wire is energized, the first conductive piece on the clamping part allows the current to pass through the wire to the winding on the outer wall of the fixed column, and then pass it back to the wire from the second conductive piece, forming a parallel circuit. Therefore, the fixed column will generate a repulsive magnetic force with the magnetic block, and the fixed column will push the magnetic block downward, so that the clamping part further applies a greater clamping force to the wire, which can avoid the risk of power outage or fire caused by damage or loosening of the wire, thereby improving the stability and service life of the electric energy meter;

[0025] 2. Through the setting of the protection component, when the wire in the wiring hole is short-circuited, the instantaneous current of the wire will exceed the usual level by many times. The fixed column will generate a larger repulsive magnetic force due to the excessive winding current on the outer wall, which will push the magnetic block to drive the clamping part to move downward. The downward movement of the clamping part will push the conductive part and the limit column to compress the second elastic part downward. When the limit port of the limit column moves to the position of the plug-in block, the stretched third elastic part will provide thrust for the plug-in block to insert the plug-in block into the limit port, and the conductive part and the electrical connection conductor are separated to realize the power-off function. During maintenance, the plug-in block can be pulled out of the limit port by pulling out the guide rod, and the second elastic part drives the conductive part to return to its original state, avoiding damage to the electric energy meter due to the short circuit of the wire, thereby improving the safety and service life of the electric energy meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall explosion structure of the present invention;

[0028] Figure 3 This is a partial structural cross-sectional view of the terminal block of the present invention;

[0029] Figure 4 This is a front overall cross-sectional view of the terminal block of the present invention;

[0030] Figure 5 This is a side overall cross-sectional view of the terminal block of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the clamping assembly of the present invention;

[0032] Figure 7 This is a cross-sectional view of the clamping assembly structure of the present invention.

[0033] The accompanying drawings are marked as follows: 1. Electric energy meter body; 11. Mounting groove; 12. Cover; 13. Electrical connection conductor; 2. Terminal block; 21. Wiring hole; 22. Pressing groove; 23. Adjusting groove; 24. First sliding groove; 25. Connecting hole; 3. Clamping assembly; 31. Clamping member; 32. Guide column; 33. Magnetic block; 34. Adjusting block; 35. Sliding chamber; 36. Fixed column; 37. First conductive sheet; 38. Second conductive sheet; 39. First elastic member; 310. Conductive member; 311. Guide groove; 312. Limiting column; 313. Limiting port; 314. Second elastic member; 4. Protective assembly; 41. Plug-in block; 42. Guide rod; 43. Second sliding groove; 44. Support plate; 45. Third elastic member. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Example 1

[0036] The wiring terminals of electricity meters usually fix the wires by tightening screws. This not only requires reliance on tools, but also makes it impossible to judge the tightness between the screws and the wires. If they are too tight, the wires can easily be damaged, while if they are too loose, the wires can easily fall out of the wiring holes, causing the risk of power outages or fire.

[0037] refer to Figures 1 to 4 As shown, an electric energy meter according to an embodiment of the present invention includes an electric energy meter body 1 and a mounting slot 11 provided on the electric energy meter body 1, a cover 12 is installed on the mounting slot 11, a terminal block 2 is arranged in the mounting slot 11, a plurality of wiring holes 21 are provided at one end of the terminal block 2 away from the mounting slot 11, and electrical connection conductors 13 are provided in the mounting slot 11, the same number as the wiring holes 21 and the same position as the wiring holes 21 are provided, a pressing slot 22 is provided at the upper end of the terminal block 2, and the same number as the wiring holes 21 and the same position as the wiring holes 21 are provided in the pressing slot 22, a first sliding slot 24 is provided below each adjusting slot 23, a connecting hole 25 is connected between the adjusting slot 23 and the first sliding slot 24, each first sliding slot 24 is connected to the corresponding wiring hole 21, and a clamping component 3 is provided inside each first sliding slot 24.

[0038] refer to Figures 4 to 7As shown, the clamping assembly 3 includes a clamping member 31, which is slidably connected to the corresponding first sliding groove 24. The upper end of the clamping member 31 is fixedly connected to a guide column 32, which is slidably connected to the connecting hole 25. The end of the guide column 32 away from the clamping member 31 is fixedly connected to a magnetic block 33. An adjusting block 34 is provided in the adjusting groove 23, and a sliding chamber 35 is opened in the adjusting block 34. The magnetic block 33 is slidably connected to the sliding chamber 35. A fixed column 36 is fixedly connected to the sliding chamber 35, and the outer wall of the fixed column 36 is wrapped around It is wound with a winding, and dynamic adjustment of the clamping force is achieved through the electromagnetic coupling between the winding on the fixed column 36 and the magnetic block 33. A first conductive sheet 37 and a second conductive sheet 38 are provided at the end of the clamping member 31 away from the guide column 32. The first conductive sheet 37 and the second conductive sheet 38 are connected to the input and output lines of the winding on the outer wall of the fixed column 36 through electric wires. A first elastic member 39 is connected between the adjustment block 34 and the adjustment slot 23 and is sleeved on the outer wall of the adjustment block 34 and the guide column 32. The first elastic member 39 is used to provide rebound force for the adjustment block 34.

[0039] The clamping force in the clamping assembly 3 is dynamically adjusted through electromagnetic induction between the magnetic block 33 and the windings of the fixed column 36. When the wire is energized, the current passing through the windings generates a magnetic field with the same polarity as the magnetic block 33, which pushes the clamping member 31 to press the wire tightly using the principle of like charges repelling each other.

[0040] In the initial state, one end of the magnetic block 33 and the fixed column 36 are attracted to each other, and the suction force of the magnetic block 33 is greater than the pulling force of the first elastic member 39, so the clamping member 31 can be lifted by pulling the adjustment block 34. When the first conductive piece 37 contacts the wire, the current will be transmitted through the wire to the winding on the outer wall of the fixed column 36, and then transmitted back to the wire from the second conductive piece 38, forming a parallel circuit. Therefore, the fixed column 36 will generate a repulsive magnetic force with the end in contact with the magnetic block 33 due to the current in the winding. According to the principle of like charges repel, the fixed column 36 will push the magnetic block 33 to move downward.

[0041] refer to Figure 4 and Figure 5 As shown, a conductive member 310 is provided in the first sliding groove 24, and a guide groove 311 is provided on the side of the conductive member 310. The guide groove 311 is slidably connected to the clamping member 31. The end of the conductive member 310 away from the clamping member 31 is fixedly connected to the limiting column 312, and the outer wall of the limiting column 312 is provided with a limiting opening 313. The end of the limiting column 312 away from the conductive member 310 is fixedly connected to the second elastic member 314, and the other end of the second elastic member 314 is connected to the first sliding groove 24. The compression force of the second elastic member 314 is greater than the repulsive force between the fixed column 36 and the magnetic block 33, so it does not affect normal use.

[0042] In actual use, when the electricity meter needs to be wired, first open the cover 12 to expose the terminal block 2, and then separate the clamping member 31 and the conductive member 310 by pulling out the adjustment block 34 on the terminal block 2, and feed the wire through the wiring hole 21 into the space between the clamping member 31 and the conductive member 310, and loosen the adjustment block 34 to allow the clamping member 31 and the conductive member 310 to close and allow the wire to be initially fixed. When all the wires are connected, power is turned on, and the first conductive piece 37 on the clamping member 31 allows the current to pass through the wire to the winding on the outer wall of the fixing column 36, and then be transmitted back to the wire from the second conductive piece 38 to form a parallel circuit. Therefore, the fixing column 36 will generate a repulsive magnetic force at the end in contact with the magnetic block 33 due to the current of the winding. According to the principle of like charges repel, the fixing column 36 will push the magnetic block 33 to move downward, so that the clamping member 31 further applies a greater clamping force to the wire.

[0043] To sum up, through the setting of the clamping assembly 3, the clamping member 31 and the conductive member 310 are separated by pulling out the adjusting block 34, the wire is sent between the clamping member 31 and the conductive member 310 through the wiring hole 21, and the adjusting block 34 is loosened to allow the clamping member 31 and the conductive member 310 to be closed and the wire is initially fixed. When the wire is energized, the first conductive piece 37 on the clamping member 31 will allow the current to pass through the wire to the winding on the outer wall of the fixing column 36, and then be transmitted back to the wire from the second conductive piece 38 to form a parallel circuit. Therefore, the fixing column 36 will generate a repulsive magnetic force with the magnetic block 33, and the fixing column 36 will push the magnetic block 33 to move downward, so that the clamping member 31 further applies a greater clamping force to the wire, which can avoid the risk of power outage or fire caused by damage or loosening of the wire, thereby improving the stability and service life of the electricity meter.

[0044] Example 2

[0045] When a short circuit occurs in the wires in the terminal block, the current in the wires will increase and may even burn the energy meter, leading to a power outage or the risk of fire due to overheating of the wires. Therefore, this embodiment improves the device described in the above embodiment.

[0046] refer to Figure 4 and Figure 5 As shown, a conductive member 310 is provided in the first sliding groove 24, and a guide groove 311 is provided on the side of the conductive member 310. The guide groove 311 is slidably connected to the clamping member 31. The end of the conductive member 310 away from the clamping member 31 is fixedly connected to the limiting column 312, and a limiting opening 313 is provided on the outer wall of the limiting column 312. The end of the limiting column 312 away from the conductive member 310 is fixedly connected to the second elastic member 314, and the other end of the second elastic member 314 is connected to the first sliding groove 24.

[0047] refer to Figure 5As shown, a protective component 4 is provided on the side of the limiting column 312, and the protective component 4 includes a plug-in block 41, one end of the plug-in block 41 is in contact with the outer wall of the limiting column 312, and the other end of the plug-in block 41 is fixedly connected to a guide rod 42, and the other end of the guide rod 42 extends to the outside of the terminal row 2. The interior of the terminal row 2 is provided with a second sliding groove 43 with the same number and corresponding position as the first sliding groove 24, and the outer wall of the guide rod 42 is fixedly connected to a support plate 44 slidably connected to the second sliding groove 43, and a third elastic member 45 is connected between the support plate 44 and the second sliding groove 43, and the third elastic member 45 is used to provide thrust for the plug-in block 41.

[0048] The second elastic member 314 and the third elastic member 45 cooperate to realize automatic power off and inspection and restoration after a short circuit.

[0049] In actual use, when the wire in the wiring hole 21 is short-circuited, the instantaneous current of the wire will exceed the normal level by many times. The fixing column 36 will generate a larger repulsive magnetic force due to the excessive winding current on the outer wall, which will push the magnetic block 33 to drive the clamping member 31 to move downward. The downward movement of the clamping member 31 will push the conductive member 310 and the limiting column 312 to compress the second elastic member 314 downward. When the limiting opening 313 of the limiting column 312 moves to the position of the plug-in block 41, the stretched third elastic member 45 will provide thrust for the plug-in block 41, inserting the plug-in block 41 into the limiting opening 313, and separating the conductive member 310 from the electrical connection conductor 13 to achieve the power-off function. During maintenance, the plug-in block 41 can be pulled out of the limiting opening 313 by pulling out the guide rod 42, and the second elastic member 314 drives the conductive member 310 to return to its original state.

[0050] In summary, through the setting of the protection component 4, when a short circuit occurs in the wire in the wiring hole 21, the instantaneous current of the wire will exceed the normal value by many times. The fixing column 36 will generate a larger repulsive magnetic force due to the excessive winding current on the outer wall, which will push the magnetic block 33 to drive the clamping member 31 to move downward. The downward movement of the clamping member 31 will push the conductive member 310 and the limiting column 312 to compress the second elastic member 314 downward. When the limiting opening 313 of the limiting column 312 moves to the position of the plug-in block 41, the stretched third elastic member 45 will provide thrust for the plug-in block 41, inserting the plug-in block 41 into the limiting opening 313, and separating the conductive member 310 and the electrical connection conductor 13 to achieve the power-off function. During maintenance, the plug-in block 41 can be pulled out of the limiting opening 313 by pulling out the guide rod 42, and the second elastic member 314 drives the conductive member 310 to return to its original state, avoiding damage to the electric energy meter due to the short circuit of the wire, thereby improving the safety and service life of the electric energy meter.

[0051] Example 3

[0052] A method for using an electric energy meter comprises the following steps:

[0053] S1. When connecting the electric energy meter, first open the cover 12 and pull the adjustment block 34 to separate the clamping member 31 from the conductive member 310;

[0054] S2. Insert the wire into the wiring hole 21 to the conductive member 310 and loosen the adjustment block 34 to close the clamping member 31 and clamp the wire.

[0055] S3, after power is turned on, the fixing column 36 generates a magnetic force due to the winding that repels the magnetic block 33, pushing the clamping member 31 to increase the clamping force;

[0056] S4. When a short circuit occurs in the wire, the instantaneous current will exceed the normal current by several times, causing the fixing post 36 to generate a greater magnetic force and push the limiting post 312 downward, allowing the plug-in block 41 to be inserted into the limiting opening 313, separating the conductive member 310 from the electrical connection conductor 13;

[0057] S5. During maintenance, the plug-in block 41 is removed from the limiting opening 313 by pulling out the guide rod 42 to restore the conductive member 310 to its original state. The wire can then be pulled out of the wiring hole 21 to be replaced or repaired.

[0058] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electric energy meter, comprising an electric energy meter body and a mounting slot provided on the electric energy meter body, wherein a cover is mounted on the mounting slot, characterized in that: A terminal block is provided in the mounting slot, a plurality of wiring holes are provided at one end of the terminal block away from the mounting slot, and electrical connection conductors are provided in the mounting slot in the same number and positions as the wiring holes; A pressing groove is provided at the upper end of the terminal block, and adjustment grooves are provided in the pressing groove, the number of which is the same as and the positions of which are corresponding to the wiring holes. A first sliding groove is provided below each of the adjustment grooves, and a connecting hole is provided between the adjustment groove and the first sliding groove. Each of the first sliding grooves is connected to the corresponding wiring hole, and a clamping component is provided inside each of the first sliding grooves.

2. The electric energy meter according to claim 1, characterized in that: The clamping assembly includes a clamping member, which is slidably connected in the corresponding first sliding groove. The upper end of the clamping member is fixedly connected to a guide column, which is slidably connected in the connecting hole. The end of the guide column away from the clamping member is fixedly connected to a magnetic block.

3. The electric energy meter according to claim 2, characterized in that: An adjustment block is provided in the adjustment groove, a sliding chamber is opened in the adjustment block, the magnetic block is slidably connected in the sliding chamber, a fixed column is fixedly connected in the sliding chamber, and a winding is wound around the outer wall of the fixed column. Dynamic adjustment of the clamping force is achieved through the electromagnetic coupling between the winding on the fixed column and the magnetic block.

4. The electric energy meter according to claim 3, characterized in that: A first conductive sheet and a second conductive sheet are provided at one end of the clamping member away from the guide column. The first conductive sheet and the second conductive sheet are connected to the input and output wires of the winding on the outer wall of the fixing column.

5. The electric energy meter according to claim 4, characterized in that: A first elastic member is connected between the adjusting block and the adjusting slot and is sleeved on the adjusting block and the outer wall of the guide column. The first elastic member is used to provide a rebound force for the adjusting block.

6. The electric energy meter according to claim 5, characterized in that: A conductive member is provided in the first sliding groove, a guide groove is provided on a side of the conductive member, and the guide groove is slidably connected to the clamping member.

7. The electric energy meter according to claim 6, characterized in that: One end of the conductive member away from the clamping member is fixedly connected to a limiting column, a limiting opening is provided on an outer wall of the limiting column, one end of the limiting column away from the conductive member is fixedly connected to a second elastic member, and the other end of the second elastic member is connected to the first sliding groove.

8. The electric energy meter according to claim 7, characterized in that: A protection component is provided on the side of the limiting column, and the protection component includes a plug-in block, one end of the plug-in block is in contact with the outer wall of the limiting column, and the other end of the plug-in block is fixedly connected to a guide rod, and the other end of the guide rod extends to the outside of the terminal block.

9. The electric energy meter according to claim 8, characterized in that: The terminal block has a second sliding groove whose number is the same as the first sliding groove and whose position corresponds to the first sliding groove. The outer wall of the guide rod is fixedly connected to a support plate which is slidably connected to the second sliding groove. A third elastic member which is sleeved on the outer wall of the guide rod is connected between the support plate and the second sliding groove. The third elastic member is used to provide thrust for the plug-in block.

10. A method for using an electric energy meter, using an electric energy meter according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. When wiring the energy meter, first open the cover and pull the adjustment block to separate the clamping part from the conductive part; S2. Insert the wire into the wiring hole onto the conductive part, and loosen the adjustment block to close the clamping part and clamp the wire; S3. After power is turned on, the fixed column generates a magnetic force that repels the magnetic block due to the winding, pushing the clamping part to increase the clamping force; S4. When a short circuit occurs in the wire, the instantaneous current will exceed the normal current by several times, causing the fixing column to generate a greater magnetic force and push the limit column downward, allowing the plug-in block to be inserted into the limit opening, separating the conductive part from the electrical connection conductor; S5. During maintenance, pull out the guide rod to allow the plug-in block to leave the limit opening, so that the conductive part returns to its original state. The wire can be pulled out of the wiring hole and replaced or repaired.

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