CN110108910A - A kind of electric energy meter and the electricity box with the electric energy meter - Google Patents

Abstract

The invention relates to an electric energy meter. The space enclosed by the base and the meter cover is provided with a first transformer through which the live wire penetrates, a second transformer through which the neutral wire penetrates, and a puncture wire clip for taking voltage. The clamp has a first threading hole for the live wire to pass through and a second threading hole for the zero line to pass through. The two side plates of the base are correspondingly opened with the first wire-in hole and the first wire-out hole for the live wire to pass through in turn. , and the second wire inlet hole and the second wire outlet hole for the zero line to pass through in turn, the first wire hole and the first transformer are located on the first routing path where the live wire passes through the first wire inlet hole and the first wire outlet hole , the second threading hole and the second transformer are located on the second wiring path where the neutral line passes through the second wire inlet hole and the second wire outlet hole. The present invention also relates to a meter box with the electric energy meter mentioned above. The live wire and the neutral wire can directly pass through the electric energy meter, and the voltage can be clamped through the piercing wire, which can keep the temperature of the electric energy meter normal and avoid the possibility of burning the meter.

Description

Electric energy meter and meter box with the electric energy meter

technical field

The invention relates to the technical field of electric meters, in particular to an electric energy meter and a meter box with the electric energy meter.

Background technique

An electric energy meter is an instrument used to measure electric energy, also known as an electric meter, a fire meter, and a kilowatt-hour meter. , It is more and more common to use in industrial production and life.

The current electric energy meter is such as the Chinese utility model patent "electric energy meter" whose patent number is CN201520684815.6 (the authorized announcement number is CN204882667U). Both ends are provided with two first hooks, and the base is provided with a first engaging boss corresponding to the first engaging hook, and the first engaging hook is engaged with the first engaging boss, so that The terminal button box includes a box body, a bottom plate, and wiring terminals. The box body is provided with a plurality of placement cavities with openings at the bottom and arranged side by side. The wiring terminals are installed in the placement cavity; the front of the placement cavity is provided with wiring holes. , the top of the placement cavity is provided with an operation hole; the bottom plate is fixedly matched with the bottom of the box body.

As shown in Figure 13 and Figure 14, the electric energy meter includes a base 1' and a table cover 2', and the space enclosed by the base 1' and the table cover 2' is provided with a terminal box 3', a transformer 6' and the circuit board 7', the transformer 6' is connected to the circuit board 7' through a conductive connector 61', and the terminal box 3' is provided with a first terminal 41', a second terminal 42', a third The connection terminal 51' and the fourth connection terminal 52', the first connection terminal 41' and the second connection terminal 42' are connected through the first copper piece 43', the third connection terminal 51' and the fourth connection terminal 52' are connected through the second The copper piece 53' is connected, and the fire wire is connected to the interface 411' of the first terminal 41', and is pressed into the interface 411' of the first terminal 41' through the first screw 44', and passed through the first copper piece in turn. 43' and the second terminal 42'; the neutral line is connected to the interface 511' of the third terminal 51', and the neutral line is pressed to the interface of the third terminal 51' by the second screw 54' 511', and connected through the second copper piece 53' and the fourth terminal 52' in turn, the second copper piece 53' penetrates the through hole of the transformer 6', and in the energized state, the current on the live wire passes through The first copper piece 43' generates heat. When the first screw 44' is not tightly connected to the live wire, the contact resistance will be increased, and the temperature will rise to burn the meter; the current on the zero line passes through the second The copper piece 53' generates heat, and when the second screw 54' is not tightly connected to the zero line, the contact resistance will increase, and the temperature of the circuit will rise, resulting in burning the meter.

Contents of the invention

The first technical problem to be solved by the present invention is to provide an electric energy meter that does not need screws or the like during wiring and thus avoids the burning of the electric meter caused by overheating.

The first technical problem to be solved by the present invention is to provide a meter box that does not need screws for wiring, which is convenient for wiring and avoids burning of the electric meter caused by overheating.

The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: an electric energy meter, which includes a base and a cover arranged on the base, and is characterized in that: the space enclosed by the base and the cover is provided with a The first transformer through which the live wire penetrates, the second transformer through which the neutral wire penetrates, and the piercing clamp for taking voltage, wherein,

The puncture wire clamp has a first threading hole for the live wire to pass through and a second threading hole for the zero line to pass through, and the two side plates of the base are correspondingly opened with first incoming wires for the live wire to pass through in sequence hole and the first wire outlet hole, as well as the second wire inlet hole and the second wire outlet hole for the zero line to pass through in turn, the first wire hole and the first transformer are located where the live wire passes through the first wire inlet hole and the first On the first wiring path of the hole, the second threading hole and the second transformer are located on the second wiring path where the neutral line passes through the second wire inlet hole and the second wire outlet hole.

The two side plates on the base can be two connected side plates, or two oppositely arranged side plates. In order to facilitate wiring, preferably, the two side plates of the base are oppositely arranged upper board and the lower board, the first wire inlet hole on the upper board is opposite to the first wire outlet hole on the lower board, and the second wire inlet hole on the upper board is opposite to the second wire outlet hole on the lower board . In this way, the possibility of bending of the live wire and the neutral wire during routing is reduced, thereby reducing the damage of the live wire and the neutral wire due to bending.

In order to accommodate the puncture wire clip conveniently and prevent the puncture wire clip from moving, a partition board protrudes from the bottom plate of the base adjacent to the lower board, the partition board is arranged opposite to the lower board, and An accommodating cavity for accommodating the puncture wire clip is formed between the lower plates, and the partition plate has a first through hole corresponding to the first wire inlet hole and a second through hole corresponding to the second wire inlet hole. Two through holes.

The piercing clip can be an integral part, or two splints that fit together. In order to facilitate the processing of the piercing clip, preferably, the piercing clip includes two splints that fit together. A first arc-shaped groove and a second arc-shaped groove are correspondingly opened, and the inner wall of the first arc-shaped groove is protruded with a first sharp part for piercing the insulating part of the live wire. The inner wall is protruded with a second sharp part used to pierce the insulating part of the neutral line. The first arc-shaped grooves of the two splints are combined to form the first threading hole. The first sharp part is located at the On the inner peripheral wall of the first threading hole, the second arc-shaped grooves of the two splints cooperate to form the second threading hole, and the second sharp part is located on the inner peripheral wall of the second threading hole.

In order to protect the live line part and the neutral line part in the space enclosed by the base and the cover, preferably, a first guard and a second guard are formed on the bottom plate of the base, and the first guard is formed along the first guard. The first line extends in the direction of the wiring path, and is provided with a first channel for the live wire to pass through; the second guard extends along the direction of the second line path, and has a second channel for the neutral line to pass through, and the first The first channel and the second channel are arranged side by side. In this way, the live wire and the neutral wire are prevented from being exposed in the space enclosed by the base and the cover, and the influence of electric components in the space on the live wire and the neutral wire is reduced, and the live wire and the neutral wire are effectively protected.

In order to further avoid bending during the threading process of the live wire and the neutral wire, preferably, the first guard and the second guard are rod-shaped, and the first channel extends along the axial direction of the first guard , the second channel extends along the axial direction of the second guard. In this way, the live wire and the neutral wire can respectively pass through the linear first guard and the second guard more smoothly, reducing the possibility of bending of the live wire in the first guard and the possibility of bending in the second guard. The possibility of bending the zero line part.

Further preferably, both the first end of the first guard and the first end of the second guard pass through the upper plate of the base, the second end of the first guard, the first end of the second guard An installation cavity for accommodating the first transformer and the second transformer is formed between the two ends and the partition, and the through hole of the first transformer corresponds to the first through hole on the partition. The through holes on the two transformers are arranged correspondingly to the second through holes on the partition plate. In this way, the first transformer and the second transformer are positioned while protecting the live wire part and the neutral wire part in the space enclosed by the base and the cover.

There are many ways to connect the first transformer and the second transformer. Preferably, both the first transformer and the second transformer are plugged and fixed in the installation cavity.

In order to realize the positioning and installation of the first transformer, preferably, a first annular flange and a first annular groove are respectively provided on the second end of the first guard and the partition plate, and correspondingly, the first The end faces of the two ends of a transformer along the axial direction of its through hole are respectively provided with a second annular groove that is plugged and fitted with the first annular flange and a second annular groove that is plugged and fitted with the first annular groove. The second annular flange, the second annular groove and the second annular flange are arranged concentrically with the through hole of the first transformer.

In order to realize the positioning and installation of the second transformer, preferably, a third annular flange and a third annular groove are respectively provided on the second end of the second guard and the partition plate, and correspondingly, the first The end faces of the two transformers along the axial direction of the through hole are respectively provided with a fourth annular groove that is plugged and fitted with the third annular flange and a fourth annular groove that is plugged and fitted with the third annular groove. The fourth annular flange, the fourth annular groove and the fourth annular flange are arranged concentrically with the through hole of the second transformer.

The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: a meter box with the above-mentioned electric energy meter, which is characterized in that it includes a box for accommodating the electric energy meter, and the electric energy meter is hung on the The bottom plate of the above-mentioned box body, and the box body is provided with a third wire inlet hole for the live wire to penetrate and a fourth wire inlet hole for the neutral wire to penetrate on the wall board adjacent to the upper board. The wall plate of the plate is provided with a third outlet hole for the live wire to pass through and a fourth outlet hole for the zero wire to pass through.

Preferably, a circuit breaker is provided on the bottom plate of the box at a position adjacent to the third outlet hole, and both the live wire and the neutral wire pass through the circuit breaker and pass through the corresponding outlet hole to exit the outside the box.

In order to facilitate the connection between the electric energy meter and the meter box, there are at least two boxes, and they are arranged side by side. The third wire inlet hole and the fourth wire inlet hole are connected to form strip holes. The above-mentioned strip-shaped holes are all opened, and the live wire and the neutral line are both penetrated through the corresponding strip-shaped holes and passed on the electric energy meter in the corresponding box.

Compared with the prior art, the present invention has the advantages that: the live wire and the neutral wire can directly pass through the electric energy meter, and the voltage on the live wire and the neutral wire can be clamped by the puncture wire to supply power to the circuit board, and the circuit board loop is at 220V voltage There is basically no heat generation, and the present invention makes the current in the live wire and the neutral wire do not need to pass through the connecting terminals, copper parts and screws in the prior art, so that the temperature of the electric energy meter remains normal, avoiding the overheating of the meter and the possibility of burning the meter , In addition, the wiring between the electric energy meter and the meter box is convenient, simple and clear, saves time and effort, and improves work efficiency.

Description of drawings

Fig. 1 is a schematic structural view of an electric energy meter installed in a meter box according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of a three-dimensional decomposition structure of an electric energy meter (a live wire and a neutral wire are threaded through);

Fig. 3 is the partial structure diagram of electric energy meter in the embodiment of the present invention;

Fig. 4 is the partial structure diagram of electric energy meter in the embodiment of the present invention;

Fig. 5 is the cross-sectional view of electric energy meter in the embodiment of the present invention (passing live wire and neutral wire);

Fig. 6 is a cross-sectional view of the partial structure of Fig. 5;

Fig. 7 is the structural representation of electric energy meter base;

Fig. 8 is a structural schematic diagram of another angle of Fig. 7;

FIG. 9 is a schematic structural view of a puncture clip according to an embodiment of the present invention;

Fig. 10 is a schematic diagram of the three-dimensional exploded structure of Fig. 9;

Fig. 11 is a schematic structural diagram of a box body according to an embodiment of the present invention;

Fig. 12 is a schematic diagram of the connection of main components in the electric energy meter of the embodiment of the present invention;

Fig. 13 is a schematic diagram of a three-dimensional exploded structure of an electric meter in the background technology in an embodiment of the present invention;

FIG. 14 is a structural schematic diagram of another angle of FIG. 13 .

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 to 12, the electric energy meter of the embodiment of the present invention includes a base 1 and a meter cover 2 arranged on the base 1, and a first transformer 31, a second Two transformers 32, the circuit board 7 and the piercing wire clamp 4 for taking voltage; Wherein,

As shown in Figure 6, the first transformer 31 has a through hole 310 for the live wire 100 to pass through, the first transformer 31 can be connected with the circuit board 7, and the second transformer 32 has a hole 310 for the neutral wire 200 to pass through Through the hole 320, the second transformer 32 can be connected to the circuit board 7, the connection of the first transformer 31 and the second transformer 32 to the circuit board is similar to that in Figure 13, and the first transformer 31 can be connected through the first conductive connection. The component 301 is connected to the first conductive component of the circuit board 7 , and the second transformer 32 can be connected to the second conductive component on the circuit board 7 through the second conductive connection component 302 .

As shown in Figures 3 to 8, the two side plates of the base 1 are correspondingly provided with a first wire inlet hole 111 and a first wire outlet hole 121 for the live wire 100 to pass through in sequence, and a first wire hole 121 for the zero wire 200 to pass through in sequence. Two wire inlet holes 112 and second wire outlet holes 122. In this embodiment, the two side plates of the base 1 are respectively the upper board 11 and the lower board 12 arranged oppositely, and the first wire inlet hole 111 and the The first wire outlet hole 121 on the lower board 12 is arranged oppositely, and the second wire inlet hole 112 on the upper board 11 and the second wire outlet hole 122 on the lower board 12 are arranged oppositely, as shown in FIG. 4 to FIG. 8 .

As shown in Figures 7 and 8, a partition 14 protrudes from the bottom plate 13 of the base 1 adjacent to the lower plate 12, and the partition 14 is arranged opposite to the lower plate 12, and a container is formed between The accommodating cavity 1 a of the puncture wire clamp 4 is placed, and the partition 14 has a first through hole 141 corresponding to the first wire inlet hole 111 and a second through hole 142 corresponding to the second wire inlet hole 112 . The piercing wire clip 4 is connected to the circuit board 7, and the piercing wire clip 4 has a first threading hole 4a for the live wire 100 to pass through and a second threading hole 4b for the neutral wire 200 to pass through,

As shown in Figures 9 and 10, the barbed wire clamp 4 includes two splints 41 that are matched with each other, and the two splints 41 are fixed together by a connecting piece 43. In this embodiment, there are two connecting pieces 43, two splints 41 are correspondingly provided with a first arc-shaped groove 411 and a second arc-shaped groove 412. The inner wall of the first arc-shaped groove 411 is protruded with a first sharp part 4111 for piercing the insulating part of the live wire 100, and the second The inner wall of the arc-shaped groove 412 is protruded with a second sharp part 4121 for piercing the insulator of the zero line 200. The first arc-shaped grooves 411 of the two splints 41 are matched to form the above-mentioned first threading hole 4a. A sharp part 4111 is located on the inner peripheral wall of the first threading hole 4a, and the second arc-shaped grooves 412 of the two splints 41 are combined to form the above-mentioned second threading hole 4b, and the second sharp part 4121 is located in the second threading hole 4b In this way, when the live wire and the neutral wire pass through the corresponding wire holes, the first sharp part 4111 can pierce the insulation of the live wire and contact with the conductor of the live wire 100, and the second sharp part 4121 can pierce The insulating part of the neutral line is broken and the conductor of the neutral line 200 is contacted, so as to realize the voltage-taking purpose of the puncture line clamp, and its specific principle is the same as that of the existing puncture line clamp.

As shown in Figure 6, the above-mentioned first threading hole 4a and the through hole 310 of the first transformer 31 are located on the first wiring path where the live wire 100 passes through the first wire inlet hole 111 and the first wire outlet hole 121, and the second The wire hole 4 b and the through hole 320 of the second transformer 32 are located on the second wiring path where the neutral line 200 passes through the second wire inlet hole 112 and the second wire outlet hole 122 . In order to protect the part of the live line and the part of the neutral line located in the space enclosed by the base and the cover, a first guard 15 and a second guard 16 are formed on the bottom plate 13 of the base 1, and the first guard 15 is along the first The direction of the routing path extends, and there is a first channel 15a for the live wire 100 to pass through, and the live wire 100 is partially threaded in the first channel 15a; The second passage 16a for the neutral wire 200 to pass through, the neutral wire 200 is passed through the second passage 16a, and the above-mentioned first passage 15a and the second passage 16a are arranged side by side at intervals, in this embodiment, the first protection Both the member 15 and the second guard 16 are rod-shaped, the first passage 15a extends along the axial direction of the first guard 15, and the inner diameter of the first passage 15a of the first guard 15 is the same as the outer diameter of the fire wire 100 Adaptation; the second channel 16a extends along the axial direction of the second guard 16, and the inner diameter of the second channel 16a of the second guard 16 is adapted to the outer diameter of the neutral line 200, as shown in FIG. 5 .

As shown in Fig. 5 to Fig. 8, in order to protect the live wire part and the neutral wire part in the space enclosed by the base and the cover, the first end of the first guard 15 and the first end of the second guard 16 The ends all pass through the upper plate 11 of the base 1, and a gap is formed between the second end of the first guard 15, the second end of the second guard 16 and the partition 14 to accommodate the first mutual inductor 31 and the second mutual inductor. The installation cavity 1b of the transformer 32, the through hole 310 of the first transformer 31 is set corresponding to the first through hole 141 on the partition 14, the through hole 320 on the second transformer 32 is connected to the second through hole on the partition 14 142 is set correspondingly; the above-mentioned first transformer 31 and second transformer 32 are plugged and fixed in the installation cavity 1b.

When the live wire 100 is threaded, the live wire 100 passes through the first wire inlet hole 111, and passes through the first channel 15a, the through hole 310, the first through hole 141 and the first wire hole 4a in sequence, and then passes through the first wire outlet 121 hole. Passing out; when the neutral wire 200 is passed through, the neutral wire 200 passes through the second wire inlet hole 112, and passes through the second channel 16a, the through hole 320, the second through hole 142 and the second threading hole 4b in sequence, and then passes through the second wire hole 4b. Two outlet holes 122 pass through, as shown in FIG. 6 .

As shown in Figures 6 to 8, in order to realize the installation of the above-mentioned first transformer, the second end of the first guard 15 and the partition 14 are respectively provided with a first annular flange 151 and a first annular groove 143. Correspondingly, the end faces of the first mutual inductor 31 along the axial direction of the through hole 310 are respectively provided with a second annular groove 311 that is plugged and fitted with the first annular flange 151 and a second annular groove 311 that is fitted with the first annular flange 151 The first annular groove 143 is mated with the second annular groove 312 , and the second annular groove 311 and the second annular groove 312 are arranged concentrically with the through hole 310 of the first transformer 31 . There are many ways to install the above-mentioned first transformer, and it only needs to be able to realize the purpose of positioning and installing the first transformer.

As shown in Figure 6, in order to realize the installation of the above-mentioned second transformer, the second end of the second guard 16 and the partition plate 14 are respectively provided with a third annular flange 161 and a third annular groove 144, corresponding to Specifically, the end surfaces of the two ends of the second transformer 32 along the axial direction of the through hole 320 are respectively provided with a fourth annular groove 321 that is plugged and fitted with the third annular flange 161 and a fourth annular groove 321 that is mated with the third annular flange 161 . The fourth ring-shaped flange 322 is inserted into the groove 144 , and the fourth ring-shaped groove 321 and the fourth ring-shaped flange 322 are arranged concentrically with the through hole 320 of the second transformer 32 . There are many ways to install the above-mentioned second transformer, and it only needs to be able to achieve the purpose of positioning and installing the second transformer.

As shown in Figure 2, the watch cover 2 in this embodiment includes an upper end cover 21, a middle cover 23, and a lower end cover 22, and the middle cover 23 includes a cover body 231 and a cover plate 232 covering the cover body 231. A cavity 2311 for installing the module 8 is formed on the body 231 , and the module 8 is located between the cover body 231 and the cover plate 232 when the cover plate 232 is in a state covering the cover body 231 .

As shown in Fig. 1 and Fig. 11, the meter box with the above-mentioned electric energy meter includes a box body 5 for accommodating the electric energy meter. There are at least two box bodies 5 arranged side by side. In this embodiment, there are four box bodies 5. and arranged side by side, each box body 5 is hung with an electric energy meter, and the electric energy meter is hung on the bottom plate of the box body 5, and the bottom plate of the box body 5 is provided with a circuit breaker at a position adjacent to the third outlet hole 51 device 6, and the box body 5 is provided with a third wire inlet hole for the live wire 100 to penetrate and a fourth wire inlet hole for the neutral wire 200 to penetrate on the side plate adjacent to the upper board 11, the third wire inlet hole and the first wire inlet hole The four inlet holes are connected up and down to form a strip hole 53. The box body 5 is provided with a third outlet hole 51 for the live wire 100 to pass through and a fourth outlet hole for the zero wire 200 to pass through on the lower wall plate adjacent to the lower plate 12. Hole 52, when wiring, the live wire 100 and the neutral wire 200 are all penetrated by the corresponding box bar hole 53 and passed on the electric energy meter in the corresponding box body 5, and the live wire 100 and the neutral wire 200 are all passed through the corresponding electric energy meter. The outlet hole passes through, and then passes through the circuit breaker 6 and the corresponding outlet hole on the box body 5 to pass out of the box body 5 .

As shown in Figure 12, the electric energy meter has a metering part and other circuits. When it is in the energized state, the current in the live wire 100 and the neutral wire 200 passes through the corresponding transformer to generate a secondary induced current, which is used to feed the metering part in the meter. In use, the piercing wire clamp 4 takes voltage from the live wire 100 and the neutral wire 200 to supply power to the metering part and other circuits in the ammeter. The above-mentioned first transformer 31 and second transformer 32 can be current transformers of model GRT728DT, and other models of current transformers can also be used.

There is no terminal button box in the energy meter in this implementation, the live wire and the neutral wire can directly pass through the electric energy meter, and the voltage on the live wire and the neutral wire can be clamped by the puncture wire to supply power to the circuit board. The circuit board circuit is basically under 220V voltage. No heat generation, the invention makes the current in the live wire and the neutral wire not need to pass through the connecting terminals, copper parts and screws in the prior art, so that the temperature of the electric energy meter remains normal, avoiding the possibility of the meter being overheated and burning the meter. , to facilitate the wiring between the energy meter and the meter box, simple and clear, save time and effort, and improve work efficiency.

In the above-mentioned embodiment, the main protection is the connection between the electric energy meter and the live wire and the neutral wire, and how the electric energy meter and the meter box are connected through the live wire and the neutral wire. The other circuit connections involved are the same as those in the existing common electric meter Similarly, this embodiment will not be described in detail again.

Claims (13)

1. An electric energy meter, comprising a base (1) and a cover (2) arranged on the base (1), characterized in that: the space enclosed by the base (1) and the cover (2) is provided with The first transformer (31) for the live wire (100) to penetrate, the second transformer (32) for the neutral wire (200) to penetrate, and the piercing wire clip (4) for taking voltage, wherein, The piercing wire clip (4) has a first threading hole (4a) for the live wire (100) to pass through and a second threading hole (4b) for the neutral wire (200) to pass through, and the base (1) Correspondingly, the two side plates are provided with a first wire inlet hole (111) and a first wire outlet hole (121) for the live wire (100) to pass through in sequence, and a second wire inlet hole for the neutral wire (200) to pass through in sequence (112) and the second wire outlet hole (122), the first wire hole (4a) and the first transformer (31) are located at the live line (100) through the first wire inlet hole (111) and the first wire outlet hole ( 121), the second threading hole (4b) and the second transformer (32) are located at the neutral line (200) passing through the second wire inlet hole (112) and the second wire outlet hole (122 ) on the second trace path. 2. The electric energy meter according to claim 1, characterized in that: the two side plates of the base (1) are respectively an upper plate (11) and a lower plate (12) arranged oppositely, and the upper plate (11 ) on the first wire inlet hole (111) and the first wire outlet hole (121) on the lower plate (12) are relatively set, the second wire inlet hole (112) on the upper plate (11) and the lower plate ( 12) the second outlet hole (122) on the relative setting. 3. The electric energy meter according to claim 2, characterized in that: a partition (14) protrudes from the bottom plate (13) of the base (1) adjacent to the lower plate (12). The partition board (14) is arranged opposite to the lower board (12), and an accommodating cavity (1a) for accommodating the piercing wire clip (4) is formed between the lower board (12), the The partition plate (14) has a first through hole (141) corresponding to the first wire inlet hole (111) and a second through hole (142) corresponding to the second wire inlet hole (112). 4. The electric energy meter according to claim 3, characterized in that: the puncture wire clip (4) comprises two splints (41) that are mutually matched, and a first arc is correspondingly opened on the two splints (41). shaped slot (411) and a second arc-shaped slot (412), the inner wall of the first arc-shaped slot (411) is protruded with a first sharp part (4111) for piercing the insulation of the live wire (100) , the inner wall of the second arc-shaped groove (412) is protruded with a second sharp part (4121) for piercing the insulator of the zero line (200), and the first arc-shaped grooves of the two splints (41) (411) are combined to form the first threading hole (4a), the first sharp part (4111) is located on the inner peripheral wall of the first threading hole (4a), and the first two splints (41) The two arc-shaped grooves (412) cooperate to form the second threading hole (4b), and the second sharp part (4121) is located on the inner peripheral wall of the second threading hole (4b). 5. The electric energy meter according to claim 3, characterized in that: a first guard (15) and a second guard (16) are formed on the bottom plate (13) of the base (1), the first The guard (15) extends along the direction of the first routing path, and is provided with a first passage (15a) for the live wire (100) to pass through; the second guard (16) extends along the direction of the second routing path, And a second channel (16a) for passing the neutral line (200) is opened, and the first channel (15a) and the second channel (16a) are arranged side by side. 6. The electric energy meter according to claim 5, characterized in that: the first guard (15) and the second guard (16) are rod-shaped, and the first channel (15a) is along the first guard The member (15) extends in the axial direction, and the second channel (16a) extends in the axial direction of the second guard member (16). 7. The electric energy meter according to claim 5, characterized in that: the first end of the first guard (15) and the first end of the second guard (16) both pass through the base (1) On the upper plate (11), the second end of the first guard (15), the second end of the second guard (16) and the partition (14) are formed to accommodate the first mutual inductance The installation cavity (1b) of the transformer (31) and the second transformer (32), the through hole (310) of the first transformer (31) corresponds to the first through hole (141) on the partition (14) It is provided that the through hole (320) on the second mutual inductor (32) is set correspondingly to the second through hole (142) on the partition plate (14). 8. The electric energy meter according to claim 7, characterized in that: the first transformer (31) and the second transformer (32) are plugged and fixed in the installation cavity (1b). 9. The electric energy meter according to claim 8, characterized in that: the second end of the first guard (15) and the partition (14) are respectively provided with a first annular flange (151) and a second An annular groove (143), correspondingly, the end faces of the two ends of the first transformer (31) along the axial direction of its through hole (310) are respectively provided with the first annular flange (151 ) the second annular groove (311) which is mated with the first annular groove (311) and the second annular flange (312) which is mated with the first annular groove (143), the second annular groove ( 311) is arranged concentrically with the second annular flange (312) and the through hole (310) of the first transformer (31). 10. The electric energy meter according to claim 8, characterized in that: the second end of the second guard (16) and the partition (14) are respectively provided with a third annular flange (161) and a second Three annular grooves (144), correspondingly, the end faces of the two ends of the second transformer (32) along the axial direction of its through hole (320) are respectively provided with the third annular flange (161 ) the fourth annular groove (321) which is plugged and matched with the third annular groove (144) and the fourth annular flange (322) which is plugged and fitted with the third annular groove (144), the fourth annular groove ( 321) is arranged concentrically with the fourth annular flange (322) and the through hole (320) of the second transformer (32). 11. A meter box with the electric energy meter according to any one of claims 1 to 10, characterized in that: it includes a casing (5) for accommodating the electric energy meter, and the electric energy meter is hung on The bottom plate of the box body (5), and the box body (5) is provided with a third wire inlet hole for the live wire (100) to penetrate and a zero line (200 ), the box body (5) is provided with a third outlet hole (51) for the live wire (100) to pass through and a third wire outlet hole (51) for the zero wire (200) on the wall plate adjacent to the lower plate (12). ) through the fourth outlet hole (52). 12. The meter box according to claim 11, characterized in that: a circuit breaker (6) is arranged on the bottom plate of the box body (5) adjacent to the third outlet hole (51), and the live wire ( 100) and the neutral wire (200) pass through the circuit breaker (6) and go out of the box body (5) through corresponding outlet holes. 13. The meter box according to claim 11, characterized in that: there are at least two boxes (5) arranged side by side, and the third wire inlet hole and the fourth wire inlet hole are connected to form a bar-shaped hole (53), the corresponding wall plate of the box body (5) is provided with the strip hole (53), and the live wire (100) and the zero line (200) are connected by the corresponding strip hole (53). ) penetrates and is installed on the electric energy meter in the corresponding box body (5).