A device for replacing electric energy meter with power and its use method

Abstract

The present invention provides a device for replacing an electric energy meter with power on and a method for using the same, which belongs to the field of electric energy meter replacement. The device includes: in the U, V, and W phase plug-in hole groups of the plug-in connection unit: the upper and lower plug-in holes of the first current loop are connected in series, the upper and lower plug-in holes of the second current loop are connected in series, and the upper and lower plug-in holes of the voltage are connected in series through a safety device, and each upper plug-in hole is connected to the corresponding sampling terminal of the corresponding phase of the current and voltage sampling unit; each plug-in hole of the U, V, and W phase plug-in hole group and any one of the neutral line plug-in holes are plugged with a plug-in connection line; the metal sleeves of the plug-in connection lines plugged in the upper plug-in hole of the voltage and the upper plug-in holes of the first and second current loops and the N phase plug-in hole group are plugged with conductive connection clips. The method for using the device for replacing an electric energy meter with power on. The present invention is used to avoid the open circuit operation of the current transformer, avoid the leakage of the metal wiring part after the electric energy meter is removed, and realize the measurement of the electric energy meter with power on.

Description

Technical Field

[0001] The present invention relates to the field of electric energy meter replacement, and in particular to a device for replacing an electric energy meter under power and a method for using the device. Background Art

[0002] Under the existing technical conditions, when a large current load is measured by an electric energy meter, in order to prevent the electric energy meter from burning out, a current transformer with a suitable transformation ratio is used to convert the large current into a small current so as to supply the meter.

[0003] The above-mentioned current transformer is composed of a closed iron core and a winding. Its primary winding has a small number of turns and is connected in series in the circuit where the current needs to be measured; the secondary winding has a large number of turns and is connected in series in the circuit of the electric energy meter. When working, the current transformer converts the large current on the primary side into a small current on the secondary side to allow the electric energy meter to measure the current in the circuit connected in series with the primary winding. In the measurement process of the above electric energy meter, the secondary side of the current transformer cannot be open.

[0004] In fact, when replacing a three-phase four-wire energy meter with a current transformer, if the power is not turned off, the current transformer will be open during the process of replacing the energy meter. The open circuit of the current transformer will generate a steep wave and high amplitude overvoltage, and the high voltage seriously endangers the life safety of the staff. In addition, after the current transformer is open, the iron core loss is often too large, and the heat is serious, which can easily cause the transformer to overheat and burn or burn the insulation. Furthermore, when the current transformer is open-circuited, residual magnetism will be generated in the iron core of the transformer, resulting in an increase in the transformer error, affecting the accuracy of the secondary current, and thus affecting the accuracy of the measurement. In addition, after the energy meter is removed under power, the metal non-insulated part of the voltage line conductor originally connected to the removed energy meter (that is, the exposed metal wiring part of the voltage line) will be exposed, which increases the probability of electric shock to the staff and the possibility of short circuit between phases of the conductor and single-phase grounding. In addition, during the process of replacing the energy meter under power, some distribution cabinets are equipped with a joint junction box. The staff use the metal connecting piece in the joint junction box to short-circuit the two electrodes of the current transformer and disconnect the voltage line. Replacing the energy meter takes a certain amount of time, which will result in no measurement of the electricity used by the load during the replacement of the energy meter. In this case, the relevant staff of the power company usually estimates the electricity used during the replacement period and informs the user. Some customers do not agree with the estimated electricity, which is more likely to cause metering disputes. Summary of the invention

[0005] The object of the present invention is to provide a device for replacing an electric energy meter under power and a method of using the device, so as to solve at least one of the above problems.

[0006] In a first aspect, the technical solution of the present invention provides a device for replacing an electric energy meter with power on, the device comprising a current and voltage sampling unit, an electric energy metering unit, a processing unit, a display unit and a plug-in connection unit;

[0007] The current and voltage sampling unit is provided with U-phase current sampling wiring terminal, V-phase current sampling wiring terminal, W-phase current sampling wiring terminal and U-phase voltage sampling wiring terminal, V-phase voltage sampling wiring terminal, W-phase voltage sampling wiring terminal, and N-phase voltage sampling wiring terminal, which are used to collect the user's power current and power voltage during the process of live replacement of the energy meter;

[0008] The U, V, and W phase current sampling terminals respectively include current incoming line sampling terminals and current outgoing line sampling terminals of the corresponding phases;

[0009] The electric energy metering unit is connected to the current and voltage sampling unit, and is used to measure the amount of electricity used by the user during the process of replacing the electric energy meter with power on, based on the electric current and electric voltage collected by the current and voltage sampling unit;

[0010] The electric energy metering unit is connected to the processing unit;

[0011] The processing unit is connected to the display unit and is used to control the display unit to display the measured amount of electricity used by the user during the process of replacing the electric energy meter with electricity;

[0012] The plug connection unit includes a U-phase plug hole group, a V-phase plug hole group, a W-phase plug hole group and an N-phase plug hole group;

[0013] The U, V, and W phase plug hole groups respectively include the voltage upper plug hole, the voltage lower plug hole, the first current loop upper plug hole, the first current loop lower plug hole, the second current loop upper plug hole, and the second current loop lower plug hole of the corresponding phase; in the U, V, and W phase plug hole groups: the first current loop upper plug hole is connected in series with the first current loop lower plug hole, and is conductively connected to the current incoming line sampling wiring terminal of the corresponding phase of the current and voltage sampling unit; the second current loop upper plug hole is connected in series with the second current loop lower plug hole, and is conductively connected to the current outgoing line sampling wiring terminal of the corresponding phase of the current and voltage sampling unit; the voltage upper plug hole is conductively connected to the voltage sampling wiring terminal of the corresponding phase of the current and voltage sampling unit, and is connected in series with the voltage lower plug hole through a safety device;

[0014] The N-phase plug hole group includes four neutral line plug holes, the four neutral line plug holes are in H-shaped conductive connection, and any one of the four neutral line plug holes is conductively connected to the N-phase voltage sampling terminal of the current and voltage sampling unit;

[0015] Each of the U, V, and W phase plug-in socket groups and any one of the four neutral line plug-in sockets is plugged with a plug-in connection wire;

[0016] The free ends of the plug-in connection wires are conductively connected to metal sleeves, and the metal sleeves are covered with insulating sleeves;

[0017] The metal sleeves of the plug-in connection wires plugged into the voltage plug-in holes of the U, V, and W phase plug-in hole groups, the first current loop plug-in holes, and the second current loop plug-in holes, and the metal sleeves of the plug-in connection wires plugged into the N phase plug-in hole group are respectively conductively plugged with conductive connection clips;

[0018] The metal sleeve can be plugged and matched with the externally exposed metal wiring part for connecting the current line and the voltage line of the electric energy meter.

[0019] Furthermore, the device also includes a crimping connection unit; the crimping connection unit is arranged on the connection line between the current and voltage sampling unit and the plug-in connection unit;

[0020] The crimping connection unit includes a U-phase bolt crimping hole group, a V-phase bolt crimping hole group, a W-phase bolt crimping hole group and an N-phase bolt crimping hole group;

[0021] The V and W phase bolt crimping hole groups respectively include current incoming bolt crimping holes, current outgoing bolt crimping holes and voltage bolt crimping holes of the corresponding phases; the current incoming bolt crimping holes of the U, V and W phase bolt crimping hole groups are connected to the current incoming sampling wiring terminals of the corresponding phases of the current and voltage sampling units, and are connected to the plug holes on the first current loop of the plug hole group of the corresponding phase of the plug connection unit; the current outgoing bolt crimping holes of the U, V and W phase bolt crimping hole groups are connected to the current outgoing sampling wiring terminals of the corresponding phases of the current and voltage sampling units, and are connected to the plug holes on the second current loop of the plug hole group of the corresponding phase of the plug connection unit;

[0022] The voltage bolt crimping holes of the U, V, and W phase bolt crimping hole groups are connected to the voltage sampling wiring terminals of the corresponding phases of the current and voltage sampling units, and are connected to the voltage sampling wiring terminals of the plug hole groups of the corresponding phases of the plug connection unit;

[0023] The N-phase bolt crimping hole group includes two groups of N-phase bolt crimping holes that are independent of each other;

[0024] The two groups of N-phase bolt crimping holes are connected one-to-one with the two neutral line plug-in holes of the plug-in connection unit, and one group of the two groups of N-phase bolt crimping holes is connected with the N-phase voltage sampling terminal of the current and voltage sampling unit.

[0025] Further, the device also includes a metering mode switching unit;

[0026] The metering mode switching unit is connected to the electric energy metering unit and is used to send an electric energy metering mode control signal to the electric energy metering unit;

[0027] The electric energy metering unit is used to measure the electric current and the electric voltage collected by the current and voltage sampling unit using the corresponding metering algorithm preset therein after receiving the electric energy metering mode control signal sent by the metering mode switching unit;

[0028] The electric energy metering modes of the electric energy metering unit include three-phase four-wire electric energy metering, three-phase three-wire electric energy metering and single-phase electric energy metering.

[0029] Furthermore, the plug-in connection line includes a soft wire; a plug-in head is provided at the first end of the soft wire, the plug-in head includes a first metal plug whose one end is conductively connected to the first end of the soft wire, the free end of the first metal plug is a plug-in head plug-in portion, and the plug-in head plug-in portion can be plugged and matched with each plug-in hole of the plug-in connection unit; the remaining part of the first metal plug except the plug-in head plug-in portion is provided with an insulating hand-held sleeve; the second end of the soft wire is conductively connected to a metal sleeve, the metal sleeve is coated with an insulating sleeve, the metal sleeve can be inserted into the exposed metal wiring part used to connect the current line and voltage line of the electric energy meter, and can be conductively plugged into the conductive wiring clip.

[0030] Furthermore, a first metal spring sheet is attached to the outer surface of the plug-in portion of the plug head, the first metal spring sheet is conductively connected to the first end of the soft wire, the end of the metal sleeve connected to the soft wire is a blind end, and a second metal spring sheet is attached to the inner surface of the metal sleeve.

[0031] Furthermore, the conductive terminal clamp includes a second metal plug and a terminal clamp; the terminal clamp includes a dynamic line clamp and a static line clamp, one end of the static line clamp is rotatably connected to the middle part of the dynamic line clamp, the other end of the static line clamp is provided with a static clamping part, and the corresponding end of the dynamic line clamp is provided with a dynamic clamping part, the clamping surfaces of the static clamping part and the dynamic clamping part are both conductive, and the clamping surfaces of the static clamping part and the dynamic clamping part are used together to form a conductive clamping part; the second metal plug is fixedly connected to one end of the dynamic line clamp away from the dynamic clamping part, and the clamping surfaces of the static clamping part and the dynamic clamping part are both conductively connected to the second metal plug through conductive wires; a wire clamp opening and closing switch is fixed to one end of the dynamic line clamp away from the dynamic clamping part, and the wire clamp opening and closing switch is connected to the static line clamp through a reset spring; when the reset spring is in a naturally extended state, the clamping surfaces of the static clamping part and the dynamic clamping part are buckled together to form a conductive clamping part; the second metal plug can be plugged and connected to the metal sleeve of the plug-in connection line.

[0032] Furthermore, a third metal spring sheet is attached to the outer surface of the second metal plug.

[0033] Furthermore, the device also includes a power module; the power module is used to provide power for the device.

[0034] Furthermore, the device also includes a power upload control button and a GPS positioning module;

[0035] The GPS positioning module is connected to the processing unit;

[0036] The power upload control button is connected to the processing unit and is used to send a power upload control signal to the processing unit;

[0037] The device also includes a first input module and a second input module connected to the processing unit;

[0038] The first input module is used to input the work mobile phone number of the power staff; the second input module is used to input the mobile phone number of the power user who wants to replace the power meter in the power company;

[0039] The processing unit is used to perform the following steps after receiving the power upload control signal:

[0040] The location information of the old electric energy meter is collected through the GPS positioning module as the first location information;

[0041] Obtain the current power measured by the power meter of the power metering unit and the power meter measured by the live replacement power meter as the target power;

[0042] Remind the power workers to input their work mobile phone numbers through the first input module;

[0043] receiving the mobile phone number input by the power worker through the first input module as the first mobile phone number;

[0044] Remind the power staff to input the latest reserved mobile phone number of the power user who is currently replacing the power meter in the power company through the second input module;

[0045] receiving the mobile phone number input by the power worker through the second input module as the second mobile phone number;

[0046] The first mobile phone number and the second mobile phone number are concatenated using a preset first concatenation rule to obtain first concatenated data as an AES key;

[0047] The first position information and the target power are spliced ​​using a preset second splicing rule to obtain second splicing data;

[0048] Encrypt the second concatenated data using the AES key to obtain a first ciphertext;

[0049] Calculate the digital summary M of the first ciphertext using the MD5 algorithm;

[0050] The digital summary M, the AES key and the first ciphertext are concatenated using a preset third concatenation rule to obtain third concatenated data;

[0051] Encrypt the third concatenated data using a preset RSA public key to obtain a second ciphertext;

[0052] The second ciphertext is uploaded to the marketing server of the power company.

[0053] In a second aspect, the present invention provides a method for using the device for hot-swap electric energy meter described in the above aspects, the method comprising:

[0054] Step 1: Clamp the conductive wiring clips plugged into the plug-in connection wires plugged into the voltage upper plug-in holes of the U, V, and W phase plug-in hole groups, and the conductive wiring clips plugged into the plug-in connection wires plugged into the N phase plug-in hole group, correspondingly onto the U, V, W, and N phase voltage wiring terminals connected to the power supply on the voltage sampling side of the old electric energy meter;

[0055] Step 2: Clamp the conductive connection clips connected to the metal sleeves of the plug-in connection wires connected to the first current loop upper plug-in holes and the second current loop upper plug-in holes of the U, V, and W phase plug-in hole groups on the polarity screws S1 and S2 of the three current transformers connected to the U, V, and W phase current input terminals of the old electric energy meter;

[0056] Step 3, turning on the power supply of the device for replacing the electric energy meter under power;

[0057] Step 4: Remove the current wires connected to the old electric energy meter from the current sampling terminals of the old electric energy meter phase by phase, and insert the exposed metal wiring part of the current wire into the metal sleeve of the plug-in connection wire plugged into the lower plug hole of the first current loop and the lower plug hole of the second current loop of the corresponding phase plug hole group on the plug connection unit each time a current wire is removed;

[0058] Step 5: Remove the voltage wires connected to the old electric energy meter from the voltage sampling terminals of the old electric energy meter phase by phase, and insert the exposed metal wiring part of the voltage wire into the metal sleeve of the plug-in connection wire plugged into the corresponding phase voltage plug-in hole of the corresponding phase plug-in hole group on the plug-in connection unit after each voltage wire is removed;

[0059] Step 6: Remove the old energy meter and install the new one;

[0060] Step 7: Pull out each voltage line inserted into the metal sleeve in step 5 phase by phase, and connect the exposed metal wiring part of each wire to the voltage sampling terminal of the corresponding phase on the newly installed electric energy meter;

[0061] Step 8: Pull out each current wire inserted into the metal sleeve in step 4 phase by phase, and connect the exposed metal wiring part of each current wire to the corresponding current sampling terminal of the corresponding phase on the newly installed electric energy meter;

[0062] Step 9: Remove the conductive terminal clamps clamped on the polarity screws S1 and S2 of each current transformer in step 2 phase by phase;

[0063] Step 10: Remove the conductive clamps clamped on the U, V, W, and N phase voltage terminals connected to the power supply on the voltage sampling side of the old electric energy meter in step 1 phase by phase;

[0064] Step 11: record the amount of electricity displayed on the hot-line replacement energy meter device to obtain the amount of electricity measured by the hot-line replacement energy meter.

[0065] Compared with the prior art, the present invention has the following beneficial effects:

[0066] The present invention is provided with a double-circuit current connection line, one current connection line is directly connected to the two polarity screws of the current transformer connected to the input end of the electric energy meter to be replaced, and the other current connection line is used to be sleeved on the leaking metal wiring part of the current line drawn from the two polarity screws of the current transformer removed from the electric energy meter to be replaced. The present invention is provided with a double-circuit voltage connection line, one voltage connection line is used to be clamped on the voltage connection terminal of the voltage sampling side of the electric energy meter to be replaced that is connected to the power supply, and the other voltage connection line is used to be sleeved on the leaking metal wiring part of the voltage line removed from the electric energy meter. On the one hand, it helps to ensure that the current transformer is not open-circuited after the electric energy meter is disassembled, and then helps to solve the problems caused by the open-circuit operation of the current transformer. On the other hand, it also helps to ensure that the wires are not grounded or short-circuited after the electric energy meter is disassembled, avoiding electric shock accidents caused by workers touching the wires, and to a certain extent helps to increase the safety of replacing the electric energy meter.

[0067] The present invention helps to measure the electricity consumption generated in the process of replacing an electric energy meter with power on for users, and helps to reduce metering disputes.

[0068] The present invention can replace an electric energy meter with a current transformer connected to its input end while it is powered on, thereby realizing continuous power supply and non-stop operation and ensuring power supply reliability.

[0069] The invention has reliable design principle, simple structure and very broad application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0071] Figure 1 is a schematic structural diagram of a device according to an embodiment of the present invention;

[0072] Figure 2 is a schematic electrical block diagram of a device according to an embodiment of the present invention;

[0073] Figure 3 is a schematic structural diagram of a plug connection unit in a device according to an embodiment of the present invention;

[0074] Figure 4 for Figure 3 A structural schematic diagram of the U-phase plug hole group shown in FIG.

[0075] Figure 5 is a schematic structural diagram of a device according to another embodiment of the present invention;

[0076] Figure 6 is a schematic electrical block diagram of a device according to another embodiment of the present invention;

[0077] Figure 7 for Figure 5 A schematic structural diagram of a medium pressure connection unit;

[0078] Figure 8 is a schematic structural diagram of an embodiment of a plug-in connection line in the present invention;

[0079] Fig. 9 is a schematic structural diagram of another embodiment of the plug-in connecting line of the present invention;

[0080] Fig.10 is a schematic structural diagram of an embodiment of a conductive terminal clamp in the present invention;

[0081] Fig.11 is a schematic structural diagram of another embodiment of the conductive connecting clip of the present invention;

[0082] Fig.12 It is a schematic flow chart of a method of using an embodiment of the present invention.

[0083] Wherein: 1. Shell, 2. Display unit, 3. Processing unit, 4. Electric energy metering unit, 5. Current and voltage sampling unit, 6. Metering mode switching unit, 7. Crimping connection unit, 8. Plug-in connection unit, 9. Plug-in connection line, 10. Conductive connection clamp, 11. U-phase bolt crimping hole group, 12. V-phase bolt crimping hole group, 13. W-phase bolt crimping hole group, 14. N-phase bolt crimping hole group, 15. U-phase plug-in hole group, 16. V-phase plug-in hole group, 17. W-phase plug-in hole group, 18. N-phase plug-in hole group, 19. Connection line, 20. Voltage plug-in hole, 21. Safety device, 22. First current loop plug-in Hole, 23, voltage lower plug hole, 24, first current loop lower plug hole, 25, second current loop upper plug hole, 26, second current loop lower plug hole, 27, neutral line plug hole, 28, first metal plug, 29, insulating hand-held sleeve, 30, soft wire, 31, insulating sleeve, 32, metal sleeve, 33, second metal plug, 331, third metal spring sheet, 34, static wire clamp, 341, static clamping part, 35, reset spring, 36, wire clamp opening and closing switch, 37, dynamic wire clamp, 371, dynamic clamping part, 38, voltage bolt crimping hole, 39, current incoming bolt crimping hole, 40, current outgoing bolt crimping hole. DETAILED DESCRIPTION

[0084] To make the technical solution and advantages of the present invention more clear, the technical solution of the present invention will be described clearly and completely 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.

[0085] The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0086] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0087] It should be noted that the present invention uses words such as "first" and "second" to limit the corresponding parts only to facilitate the distinction of the corresponding parts. If not otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0088] The technical solution of the present invention will be introduced and explained below through several embodiments.

[0089] In one embodiment, please refer to Figure 1 and Figure 2 The present invention provides a device for replacing an electric energy meter under power, the device comprising a current and voltage sampling unit 5, an electric energy metering unit 4, a processing unit 3, a display unit 2 and a plug-in connection unit 8.

[0090] The current and voltage sampling unit 5 has U-phase current sampling terminals, V-phase current sampling terminals, W-phase current sampling terminals and U-phase voltage sampling terminals U, V-phase voltage sampling terminals V, W-phase voltage sampling terminals W, and N-phase voltage sampling terminals N, which are used to collect the user's power current and power voltage during the process of live replacement of the electric energy meter.

[0091] The U, V, and W phase current sampling wiring terminals respectively include current incoming line sampling wiring terminals and current outgoing line sampling wiring terminals of the corresponding phases.

[0092] The electric energy metering unit 4 is connected to the current and voltage sampling unit 5 , and is used to measure the amount of electricity used by the user during the process of replacing the electric energy meter with power on, based on the electric current and electric voltage collected by the current and voltage sampling unit 5 .

[0093] Specifically, Figure 1 As shown, the U-phase current sampling terminal includes the U-phase current incoming line sampling terminal US1 and the U-phase current outgoing line sampling terminal US2, the V-phase current sampling terminal includes the V-phase current incoming line sampling terminal VS1 and the V-phase current outgoing line sampling terminal VS2, and the W-phase current sampling terminal includes the W-phase current incoming line sampling terminal WS1 and the W-phase current outgoing line sampling terminal WS2.

[0094] Optionally, the U-phase current sampling terminal, the V-phase current sampling terminal, the W-phase current sampling terminal and the corresponding phase voltage sampling terminal of the current and voltage sampling unit 5 are all bolt-compression terminals.

[0095] The electric energy metering unit 4 is connected to the processing unit 3. The processing unit 3 can collect the electric energy metered by the electric energy metering unit 4.

[0096] The processing unit 3 is connected to the display unit 2 and is used to control the display unit 2 to display the amount of electricity measured by the energy metering unit 4, that is, to control the display unit 2 to display the amount of electricity used by the user during the process of replacing the energy meter with power.

[0097] It can be understood that the current and voltage sampling unit 5, the electric energy metering unit 4, the processing unit 3, and the display unit 2 can be replaced by relevant standard electric energy meters, which helps to increase the flexibility of the use of the present invention.

[0098] In specific implementation, in order to facilitate carrying and location transfer, the device for replacing the electric energy meter with power is equipped with a housing 1, and the housing 1 has a door. Figure 1 This is a schematic structural diagram of the live replacement energy meter device after removing the box door.

[0099] In this embodiment, Figures 1 to 3 As shown, the plug connection unit 8 includes a U-phase plug hole group 15 , a V-phase plug hole group 16 , a W-phase plug hole group 17 and an N-phase plug hole group 18 .

[0100] The U, V, and W phase plug hole groups respectively include the voltage upper plug hole, the voltage lower plug hole, the first current loop upper plug hole, the first current loop lower plug hole, the second current loop upper plug hole, and the second current loop lower plug hole of the corresponding phase; in the U, V, and W phase plug hole groups: the first current loop upper plug hole is connected in series with the first current loop lower plug hole, and is conductively connected to the current incoming line sampling terminal of the corresponding phase of the current and voltage sampling unit 5; the second current loop upper plug hole is connected in series with the second current loop lower plug hole, and is conductively connected to the current outgoing line sampling terminal of the corresponding phase of the current and voltage sampling unit 5; the voltage upper plug hole is conductively connected to the voltage sampling terminal of the corresponding phase of the current and voltage sampling unit 5, and is connected in series with the voltage lower plug hole through a safety device.

[0101] Specifically, taking the U-phase plug hole group 15 as an example, Figure 4 As shown, the U-phase plug hole group includes an upper voltage plug hole 20, a lower voltage plug hole 23, an upper first current loop plug hole 22, a lower first current loop plug hole 24, an upper second current loop plug hole 25, and a lower second current loop plug hole 26. In the U-phase plug hole group: the upper first current loop plug hole 22 is connected in series with the lower first current loop plug hole 24, and is conductively connected to the U-phase current incoming line sampling wiring terminal US1 of the current and voltage sampling unit 5; the upper second current loop plug hole 25 is connected in series with the lower second current loop plug hole 26, and is conductively connected to the U-phase current outgoing line sampling wiring terminal US2 of the current and voltage sampling unit 5; the upper voltage plug hole 20 is conductively connected to the U-phase voltage sampling wiring terminal U of the current and voltage sampling unit 5, and is connected in series with the lower voltage plug hole 23 through a safety device 21.

[0102] The N-phase plug hole group 18 includes four neutral line plug holes 27, and the four neutral line plug holes 27 are in H-shaped conductive connection, that is, each of the four neutral line plug holes 27 is conductively connected to the other three neutral line plug holes, such as Figure 3 Any one of the four neutral line plug-in holes 27 is conductively connected to the N-phase voltage sampling connection terminal N of the current and voltage sampling unit 5 .

[0103] During specific implementation, those skilled in the art may implement the safety device 21 according to actual conditions. For example, the safety device 21 may be a fuse.

[0104] Each plug-in hole of the U, V, W phase plug-in hole group is plugged with a plug-in connection line 9; any plug-in hole of the four neutral line plug-in holes 27 is plugged with a plug-in connection line.

[0105] During specific implementation, any one of the four neutral line plug-in holes 27 can be selected to plug in and out the connecting line according to actual work.

[0106] To simplify the structure of the diagram, this specification only provides a schematic diagram of each plug hole of the U-phase plug hole group being plugged with a plug-in connection line 9, as shown in FIG. Figure 1 Each plug hole of the V and W phase plug hole groups and any one of the four neutral line plug holes 27 can be plugged in and out of the connecting wire 9 with reference to the plug hole of the U phase plug hole group.

[0107] The free ends of the plug-in connection wires 9 are conductively connected to the metal sleeves 32 , and the metal sleeves 32 are covered with an insulating sleeve 31 .

[0108] The metal sleeves 32 of the plug-in connection wires plugged into the voltage upper plug-in holes 20, the first current loop upper plug-in holes 22, and the first current loop lower plug-in holes 24 of the U, V, and W phase plug-in hole groups, and the metal sleeves 32 of the plug-in connection wires plugged into the N phase plug-in hole group 18 are respectively conductively plugged with conductive terminal clips 10.

[0109] The metal sleeve 32 can be plugged into and matched with the externally exposed metal wiring part for connecting the current line and the voltage line of the electric energy meter.

[0110] That is, the metal sleeve 32 can be plugged in and matched with the externally leaking metal wiring part of the current line connected to the electric energy meter, and can also be plugged in and matched with the externally leaking metal wiring part of the voltage line connected to the electric energy meter.

[0111] It can be understood that the current line used to access the electric energy meter is a wire used to connect the polarity screw of the current transformer connected to the current input end of the electric energy meter and the current sampling terminal of the electric energy meter. The voltage line used to access the electric energy meter is a wire used to connect the voltage terminal connected to the power supply on the voltage sampling side of the electric energy meter and the voltage sampling terminal of the electric energy meter.

[0112] Optionally, the device further comprises a crimping connection unit 7, such as Figure 5 The crimping connection unit 7 is arranged on the connection line between the current and voltage sampling unit 5 and the plug connection unit 8 .

[0113] like Figure 7 As shown, the crimping connection unit 7 includes a U-phase bolt crimping hole group 11 , a V-phase bolt crimping hole group 12 , a W-phase bolt crimping hole group 13 and an N-phase bolt crimping hole group 14 .

[0114] The U, V, and W phase bolt crimping hole groups respectively include a current incoming line bolt crimping hole 39, a current outgoing line bolt crimping hole 40, and a voltage bolt crimping hole 38 of the corresponding phase.

[0115] like Figure 5 , Figure 7 As shown, the current incoming bolt crimping holes of the U, V, and W phase bolt crimping hole groups are connected to the current incoming sampling wiring terminals of the corresponding phases of the current and voltage sampling unit 5, and are connected to the first current loop upper plug hole 22 of the plug hole group of the corresponding phase of the plug connection unit 8. The current outgoing bolt crimping holes of the U, V, and W phase bolt crimping hole groups are connected to the current outgoing sampling wiring terminals of the corresponding phases of the current and voltage sampling unit 5, and are connected to the second current loop upper plug hole 25 of the plug hole group of the corresponding phase of the plug connection unit 8. The voltage bolt crimping holes of the V and W phase bolt crimping hole groups are connected to the voltage sampling wiring terminals of the corresponding phases of the current and voltage sampling unit 5, and are connected to the voltage sampling wiring terminals of the plug hole group of the corresponding phases of the plug connection unit 8.

[0116] The N-phase bolt crimping hole group 14 includes two groups of N-phase bolt crimping holes that are independent of each other.

[0117] The two groups of N-phase bolt crimping holes are connected one-to-one with the two neutral line plug-in holes 27 of the plug-in connection unit 8 , and one of the two groups of N-phase bolt crimping holes is connected with the N-phase voltage sampling terminal of the current and voltage sampling unit 5 .

[0118] like Figure 5 , Figure 7 As shown, the bolt crimping hole includes two metal threaded holes, and the two metal threaded holes are conductively connected. Each metal threaded hole is threadedly connected to a crimping screw. When in use, the metal connecting parts of the two parts to be connected can be inserted into the two metal threaded holes, and then tightened with crimping screws respectively. The main function of the bolt crimping hole is to connect the two parts to be connected to conduct the circuit. The use of the bolt crimping hole in the present invention is convenient for wiring and disconnecting, and convenient for replacing the current and voltage sampling unit 5. For ease of description, in this embodiment, the two metal threaded holes of the bolt crimping hole can be recorded as a first metal threaded hole and a second metal threaded hole. In specific implementation, the current and voltage sampling unit 5 can be connected through the first metal threaded hole of the bolt crimping hole of the crimping connection unit 7, and the plug-in connection unit 8 can be connected through the second metal threaded hole of the bolt crimping hole of the crimping connection unit 7.

[0119] To facilitate the connection between the crimping connection unit 7 and the plug-in connection unit 8, the voltage plug-in hole 20 of the U, V, and W phase plug-in hole groups, the first current loop plug-in hole 22, and the second current loop plug-in hole 25, as well as any neutral line plug-in hole 27 of the N phase plug-in hole group 18 of the plug-in connection unit 8 are all conductively connected with a connecting wire 19, and each relevant voltage plug-in hole 20, the first current loop plug-in hole 22, the second current loop plug-in hole 25, and the neutral line plug-in hole 27 are conductively connected to the corresponding bolt crimping hole of the crimping connection unit 7 through a wire.

[0120] Optionally, the plug-in connection line 9 includes a soft wire 30; the first end of the soft wire 30 is provided with a plug-in head, the plug-in head includes a first metal plug 28 whose one end is conductively connected to the first end of the soft wire 30, the free end of the first metal plug 28 is a plug-in head plug-in portion, and the plug-in head plug-in portion can be plugged and matched with each plug hole of the plug connection unit 8; the remaining part of the first metal plug 28 except the plug-in head plug-in portion is sleeved with an insulating hand-held sleeve 29; the second end of the soft wire 30 is conductively connected to the metal sleeve 32, the metal sleeve 32 is coated with an insulating sleeve 31, the metal sleeve 32 can be inserted into the exposed metal wiring part for connecting the current line and voltage line of the electric energy meter, and can also be conductively plugged with the conductive wiring clip 10. Figure 8 shown.

[0121] It can be understood that the plug-in holes of the plug-in connection unit 8 are the plug-in holes of the U-phase plug-in hole group 15 , the V-phase plug-in hole group 16 , the W-phase plug-in hole group 17 and the N-phase plug-in hole group 18 .

[0122] Please refer to Figure 8 The portion of the first metal plug 28 that is not covered with the insulating hand-held cover 29 is the plug-in connector.

[0123] Alternatively, if Fig. 9 As shown, a first metal spring piece 281 is attached to the outer surface of the plug-in portion of the plug head, and the first metal spring piece 281 is conductively connected to the first end of the soft wire 30. The end of the metal sleeve 32 connected to the soft wire 30 is a blind end, and a second metal spring piece 321 is attached to the inner surface of the metal sleeve 32.

[0124] The first metal plug 28 is a metal rod with a circular cross section, and a first metal spring sheet 281 is attached to the surface of the first metal plug 28, which is used to stabilize the plug and prevent it from falling off during insertion. The first metal plug 28 is mainly used to conduct the circuit.

[0125] The soft wire 30 is a copper core soft stranded wire with an insulating layer, and its main function is to conduct the circuit. The metal sleeve 32 is a circular metal blind hole, and a second metal spring piece 321 is attached in the hole to play a role of being stable and not easy to fall off during plugging.

[0126] Alternatively, if Fig.10 As shown, the conductive terminal clamp 10 includes a second metal plug 33 and a terminal clamp; the terminal clamp includes a dynamic line clamp 37 and a static line clamp 34, one end of the static line clamp 34 is rotatably connected to the middle part of the dynamic line clamp 37, the other end of the static line clamp 34 is provided with a static clamping portion 341, and the corresponding end of the dynamic line clamp 37 is provided with a dynamic clamping portion 371, the clamping surfaces of the static clamping portion 341 and the dynamic clamping portion 371 are both conductive, and the clamping surfaces of the static clamping portion 341 and the dynamic clamping portion 371 are used in combination to form a conductive clamping portion; the second metal plug 33 is fixedly connected to the dynamic line clamp 37 away from the dynamic clamping portion At one end of the part 371, the clamping surfaces of the static clamping part 341 and the dynamic clamping part 371 are both conductively connected to the second metal plug 33 through conductive wires; a wire clamp opening and closing switch 36 is fixed on the end of the dynamic wire clamp 37 away from the dynamic clamping part 371, and the wire clamp opening and closing switch 36 is connected to the static wire clamp 34 through a reset spring 35; when the reset spring 35 is in a naturally extended state, the clamping surfaces of the static clamping part 341 and the dynamic clamping part 371 are buckled together to form a conductive clamping part; the second metal plug 33 can be plugged and connected to the metal sleeve 32 of the plug-in connection line 9.

[0127] Alternatively, if Fig.11 As shown, a third metal spring piece 331 is attached to the outer surface of the second metal plug 33 .

[0128] It can be understood that the device for replacing electric energy meters with power is also equipped with a power module and a power switch. The power module is used to provide power to the device, and the power switch is used to control the power module to provide power to the device. When in use, turning on the power switch connects the power module, and the power module provides power to the device; turning off the power switch disconnects the power module, and the power module stops or ends supplying power, and the power of the device is turned off.

[0129] Alternatively, if Figure 6 As shown, the device further includes a metering mode switching unit 6;

[0130] The metering mode switching unit 6 is connected to the electric energy metering unit 4 and is used to send an electric energy metering mode control signal to the electric energy metering unit 4;

[0131] The electric energy metering unit 4 is used to measure the electric current and the electric voltage collected by the current and voltage sampling unit 5 by using the corresponding metering algorithm preset therein after receiving the electric energy metering mode control signal sent by the metering mode switching unit 6;

[0132] The electric energy metering modes of the electric energy metering unit 4 include three-phase four-wire electric energy metering, three-phase three-wire electric energy metering and single-phase electric energy metering.

[0133] In specific implementation, the electric energy metering unit 4 is built with a control circuit and a metering module, and the control circuit can receive the electric energy metering mode control signal sent by the metering mode switching unit 6, and according to the received metering mode control signal, the control metering module uses the corresponding metering algorithm to measure the power current and power voltage collected by the current and voltage sampling unit 5. In specific implementation, the metering mode switching unit 6 can be implemented with three buttons, and the three buttons correspond to the three metering modes of three-phase four-wire electric energy metering, three-phase three-wire electric energy metering and single-phase electric energy metering. Pressing different buttons sends the control signal corresponding to the corresponding electric energy metering mode to the electric energy metering unit 4.

[0134] Exemplarily, the device further includes a power upload control button and a GPS positioning module;

[0135] The GPS positioning module is connected to the processing unit 3;

[0136] The power upload control button is connected to the processing unit 3 and is used to send a power upload control signal to the processing unit 3;

[0137] The device also includes a first input module and a second input module connected to the processing unit 3;

[0138] The first input module is used to input the work mobile phone number of the power staff; the second input module is used to input the mobile phone number of the power user who wants to replace the power meter in the power company;

[0139] The processing unit 3 is used to perform the following steps after receiving the power upload control signal:

[0140] The location information of the old electric energy meter is collected through the GPS positioning module as the first location information;

[0141] Obtain the electric quantity currently measured by the live replacement electric energy meter measured by the electric energy metering unit 4 as the target electric quantity;

[0142] Remind the power workers to input their work mobile phone numbers through the first input module;

[0143] receiving the mobile phone number input by the power worker through the first input module as the first mobile phone number;

[0144] Remind the power staff to input the latest reserved mobile phone number of the power user who is currently replacing the power meter in the power company through the second input module;

[0145] receiving the mobile phone number input by the power worker through the second input module as the second mobile phone number;

[0146] The first mobile phone number and the second mobile phone number are concatenated using a preset first concatenation rule to obtain first concatenated data as an AES key;

[0147] The first position information and the target power are spliced ​​using a preset second splicing rule to obtain second splicing data;

[0148] Encrypt the second concatenated data using the AES key to obtain a first ciphertext;

[0149] Calculate the digital summary M of the first ciphertext using the MD5 algorithm;

[0150] The digital summary M, the AES key and the first ciphertext are concatenated using a preset third concatenation rule to obtain third concatenated data;

[0151] Encrypt the third concatenated data using a preset RSA public key to obtain a second ciphertext;

[0152] The second ciphertext is uploaded to the marketing server of the power company.

[0153] In specific implementation, the marketing server performs the following steps each time after receiving the second ciphertext:

[0154] Decrypt the second ciphertext using a preset RSA private key to obtain decrypted third concatenated data;

[0155] Based on the third concatenation rule, split the decrypted third concatenated data to obtain the split digital summary M, the AES key and the first ciphertext;

[0156] The MD5 algorithm is used to calculate the digital summary of the split first ciphertext to obtain the digital summary M';

[0157] Compare the consistency of the digital summary M' with the split digital summary M. If they are inconsistent, discard the received second ciphertext and the split AES key and the first ciphertext, and feedback the comparison conclusion of the inconsistent digital summary to the processing unit 3. If they are consistent, continue to perform the following steps:

[0158] Decrypt the split first ciphertext using the split AES key to obtain decrypted second concatenated data;

[0159] Splitting the decrypted second splicing data based on the second splicing rule to obtain the split first position information and target power;

[0160] Splicing and splitting the split AES key based on the first splicing rule to obtain the split first mobile phone number;

[0161] Based on the split first location information and the first mobile phone number, an electric power user who currently replaces an electric energy meter is obtained as a target electric power user;

[0162] The target power is stored under the target power user.

[0163] The target electricity volume is the electricity volume generated by the target electricity user during the process of replacing the electricity meter.

[0164] When receiving the feedback comparison conclusion that the digital digest is inconsistent, the processing unit 3 re-generates the second ciphertext and uploads it to the marketing server of the power company.

[0165] like Fig.12 As shown, the present invention provides a method for using any one of the above-mentioned devices for replacing electric energy meters under power, and the method includes the following steps 1 to 11.

[0166] In this embodiment, the electric energy meter to be replaced under power is taken as an example of a three-phase four-wire electric energy meter.

[0167] The current sampling terminals of the three-phase four-wire electric energy meter include U-phase current incoming line sampling terminal, U-phase current outgoing line sampling terminal, V-phase current incoming line sampling terminal, V-phase current outgoing line sampling terminal, W-phase current incoming line sampling terminal, and W-phase current outgoing line sampling terminal.

[0168] Step 1: Clamp the conductive wiring clips plugged into the plug-in connection wires connected to the voltage upper plug-in holes 20 of the U, V, and W phase plug-in hole groups, and the conductive wiring clips plugged into the plug-in connection wires plugged into the N phase plug-in hole group 18, correspondingly onto the U, V, W, and N phase voltage terminals connected to the power supply on the voltage sampling side of the old electric energy meter.

[0169] The old electric energy meter is the electric energy meter to be replaced.

[0170] The voltage sampling side of the old electric energy meter is connected to the U, V, W, and N phase voltage terminals of the power supply, that is, the voltage sampling side of the old electric energy meter is connected to the U phase voltage terminal, V phase voltage terminal, W phase voltage terminal and N phase voltage terminal of the power supply.

[0171] In the prior art, when the voltage sampling side of the electric energy meter is connected to a power supply, each phase of the power supply is connected to the corresponding voltage sampling terminal of the electric energy meter.

[0172] It can be understood that step one specifically includes:

[0173] Clamp the conductive wiring clip connected to the plug-in connection line connected to the voltage upper plug-in hole 20 of the U-phase plug-in hole group on the U-phase voltage wiring terminal connected to the power supply on the voltage sampling side of the old electric energy meter;

[0174] Clamp the conductive wiring clip connected to the plug-in connection line connected to the voltage upper plug-in hole 20 of the V-phase plug-in hole group on the V-phase voltage wiring terminal connected to the power supply on the voltage sampling side of the old electric energy meter;

[0175] Clamp the conductive wiring clip connected to the plug-in connection line connected to the voltage upper plug-in hole 20 of the W-phase plug-in hole group on the W-phase voltage wiring terminal connected to the power supply on the voltage sampling side of the old electric energy meter;

[0176] The conductive wiring clip plugged into the plug-in connection line connected to the voltage upper plug-in hole 20 of the N-phase plug-in hole group is clamped on the N-phase voltage wiring terminal connected to the power supply on the voltage sampling side of the old electric energy meter.

[0177] The old energy meter may be one installed in a distribution cabinet, panel or meter box.

[0178] It can be understood that the four neutral line sockets 27 can provide neutral line connections at different locations in the distribution cabinet, panel and meter box to ensure reliable conduction.

[0179] In step one, the conductive wiring clamps plugged into the plug-in connection wires connected to the voltage upper plug-in holes 20 of the U, V, and W phase plug-in hole groups and the conductive wiring clamps plugged into the plug-in connection wires plugged into the N phase plug-in hole group 18 are correspondingly clamped on the U, V, W, and N phase voltage terminals connected to the power supply on the voltage sampling side of the old electric energy meter to realize voltage sampling of the power supply connected to the old electric energy meter.

[0180] Step 2: Clamp the conductive connecting clips connected to the metal sleeves 32 of the plug-in connecting wires connected to the plug-in holes 22 on the first current loop and the plug-in holes 25 on the second current loop of the U, V, and W phase plug-in hole groups onto the polarity screws S1 and S2 of the three current transformers connected to the U, V, and W phase current input terminals of the old electric energy meter.

[0181] Specifically, take the U-phase plug hole group as an example:

[0182] The conductive terminal clamp connected to the metal sleeve of the plug-in connection line plugged into the plug-in hole 22 on the first current loop in the U-phase plug-in hole group is clamped on the polarity screw S1 of the current transformer connected to the U-phase current input terminal of the old electric energy meter, and the conductive terminal clamp connected to the metal sleeve of the plug-in connection line plugged into the plug-in hole 25 on the second current loop in the U-phase plug-in hole group is clamped on the polarity screw S2 of the current transformer connected to the U-phase current input terminal of the old electric energy meter.

[0183] With reference to the U-phase plug hole group, the conductive connecting clips plugged into the metal sleeves 32 of the plug-in connecting wires plugged into the plug holes 22 on the first current loop and the plug holes 25 on the second current loop in the V and W phase plug hole groups can be connected to the polarity screws S1 and S2 of the current transformer connected to the V and W corresponding phase current input terminals of the old electric energy meter.

[0184] Step three, turn on the power supply of the live replacement energy meter device.

[0185] The power supply of the live replacement energy meter device is turned on, and the live replacement energy meter device starts to work.

[0186] Step 4, remove the current wires connected to the old electric energy meter from the current sampling terminals of the old electric energy meter phase by phase, one end of the current wire is connected to the polarity screw of the current transformer, and the other end is connected to the current sampling terminal of the electric energy meter. Each time a current wire is removed, the exposed metal wiring part of the current wire is inserted into the metal sleeve 32 of the plug-in connection wire plugged into the first current loop lower plug-in hole 24 and the second current loop lower plug-in hole 26 of the corresponding phase plug-in hole group on the plug-in connection unit 8.

[0187] In this embodiment, step 4 specifically includes:

[0188] ① Remove the current line connected to the old electric energy meter from the U-phase current incoming line sampling terminal of the old electric energy meter, and insert the exposed metal wiring part of the removed current line into the metal sleeve 32 of the plug-in connection line plugged into the lower plug hole 24 of the first current loop of the U-phase plug hole group on the plug connection unit 8;

[0189] Remove the current wire connected to the old electric energy meter from the U-phase current outgoing line sampling terminal of the old electric energy meter, and insert the exposed metal wiring part of the removed current wire into the metal sleeve 32 of the plug-in connection wire plugged into the lower plug hole 26 of the second current loop of the U-phase plug hole group on the plug connection unit 8;

[0190] ② Remove the current line connected to the old electric energy meter from the V-phase current incoming line sampling terminal of the old electric energy meter, and insert the exposed metal wiring part of the removed current line into the metal sleeve 32 of the plug-in connection line plugged into the lower plug hole 24 of the first current loop of the V-phase plug hole group on the plug connection unit 8;

[0191] Remove the current wire connected to the old electric energy meter from the V-phase current outgoing line sampling terminal of the old electric energy meter, and insert the exposed metal wiring part of the removed current wire into the metal sleeve 32 of the plug-in connection wire plugged into the lower plug hole 26 of the second current loop of the V-phase plug hole group on the plug connection unit 8;

[0192] ③ Remove the current line connected to the old electric energy meter from the W-phase current incoming line sampling terminal of the old electric energy meter, and insert the exposed metal wiring part of the removed current line into the metal sleeve 32 of the plug-in connection line plugged into the lower plug hole 24 of the first current loop of the W-phase plug hole group on the plug connection unit 8;

[0193] Remove the current wire connected to the old electric energy meter from the W-phase current output sampling terminal of the old electric energy meter, and insert the exposed metal wiring part of the removed current wire into the metal sleeve 32 of the plug-in connection wire plugged into the lower plug hole 26 of the second current loop of the W-phase plug hole group on the plug connection unit 8.

[0194] Step 5, remove the voltage wires connected to the old electricity meter from the voltage sampling terminals of the old electricity meter phase by phase. Each time a voltage wire is removed, insert the exposed metal wiring part of the voltage wire into the metal sleeve 32 of the plug-in connection wire plugged into the corresponding phase voltage plug-in hole of the corresponding phase plug-in hole group on the plug-in connection unit 8.

[0195] The voltage sampling terminals of the three-phase four-wire electric energy meter include a U-phase voltage sampling terminal, a V-phase voltage sampling terminal, a W-phase voltage sampling terminal and an N-phase voltage sampling terminal.

[0196] In this embodiment, step five specifically includes:

[0197] S1, remove the voltage line connected to the old electric energy meter from the U-phase voltage sampling terminal of the old electric energy meter, and insert the exposed metal wiring part of the voltage line into the metal sleeve 32 of the plug-in connection line plugged into the voltage lower plug hole 23 of the U-phase plug hole group on the plug connection unit 8;

[0198] S2, remove the voltage line connected to the old electric energy meter from the V-phase voltage sampling terminal of the old electric energy meter, and insert the exposed metal wiring part of the voltage line into the metal sleeve 32 of the plug-in connection line plugged into the voltage lower plug hole 23 of the V-phase plug hole group on the plug connection unit 8;

[0199] S3, remove the voltage line connected to the old electric energy meter from the W-phase voltage sampling terminal of the old electric energy meter, and insert the exposed metal wiring part of the voltage line into the metal sleeve 32 of the plug-in connection line plugged into the voltage lower plug hole 23 of the W-phase plug hole group on the plug connection unit 8;

[0200] S4. Remove the voltage line connected to the old electric energy meter from the N-phase voltage sampling terminal of the old electric energy meter, and insert the exposed metal wiring part of the voltage line into the metal sleeve 32 of the plug-in connection line plugged into the N-phase plug-in hole group on the plug-in connection unit 8.

[0201] Step 6: Remove the old electricity meter and install the new one.

[0202] Step 7: Pull out each voltage line inserted into the metal sleeve 32 in step 5 phase by phase, and connect the exposed metal wiring part of each wire to the voltage sampling terminal of the corresponding phase on the newly installed electric energy meter.

[0203] In this embodiment, step seven includes:

[0204] Pull out the voltage line plugged into the metal sleeve 32 of the plug-in connection line plugged into the voltage lower plug hole 23 of the U-phase plug hole group on the plug connection unit 8, and then immediately connect the exposed metal wiring part of the pulled-out voltage line to the U-phase voltage sampling terminal of the newly installed electric energy meter;

[0205] Pull out the voltage line plugged into the metal sleeve 32 of the plug-in connection line plugged into the voltage lower plug hole 23 of the V-phase plug hole group on the plug connection unit 8, and then immediately connect the exposed metal wiring part of the pulled-out voltage line to the V-phase voltage sampling terminal of the newly installed electric energy meter;

[0206] Pull out the voltage line plugged into the metal sleeve 32 of the plug-in connection line plugged into the voltage lower plug hole 23 of the W-phase plug hole group on the plug connection unit 8, and then immediately connect the exposed metal wiring part of the pulled-out voltage line to the W-phase voltage sampling terminal of the newly installed electric energy meter;

[0207] Unplug the voltage wire plugged into the metal sleeve 32 of the plug-in connection wire plugged into the voltage lower plug hole 23 of the N-phase plug hole group on the plug connection unit 8, and then immediately connect the exposed metal wiring part of the unplugged voltage wire to the N-phase voltage sampling terminal of the newly installed electric energy meter.

[0208] Step eight, pull out each current line inserted into the metal sleeve 32 in step four phase by phase, and connect the exposed metal wiring part of each current line to the corresponding current sampling terminal of the corresponding phase on the newly installed electric energy meter.

[0209] In this embodiment, step eight includes:

[0210] Pull out the current wire plugged into the metal sleeve 32 of the plug-in connection wire plugged into the lower plug hole 24 of the first current loop of the U-phase plug hole group on the plug connection unit 8, and then immediately connect the leaking metal wiring part of the pulled-out current wire to the U-phase current input line sampling wiring terminal of the newly installed electric energy meter; pull out the current wire plugged into the metal sleeve 32 of the plug-in connection wire plugged into the lower plug hole 26 of the second current loop of the U-phase plug hole group on the plug connection unit 8, and then immediately connect the leaking metal wiring part of the pulled-out current wire to the U-phase current output line sampling wiring terminal of the newly installed electric energy meter;

[0211] Pull out the current wire plugged into the metal sleeve 32 of the plug-in connection wire plugged into the lower plug hole 24 of the first current loop of the V-phase plug hole group on the plug connection unit 8, and then immediately connect the exposed metal wiring part of the pulled-out current wire to the V-phase current input sampling wiring terminal of the newly installed electric energy meter; pull out the current wire plugged into the metal sleeve 32 of the plug-in connection wire plugged into the lower plug hole 26 of the second current loop of the V-phase plug hole group on the plug connection unit 8, and then immediately connect the exposed metal wiring part of the pulled-out current wire to the V-phase current output sampling wiring terminal of the newly installed electric energy meter;

[0212] Unplug the current wire plugged into the metal sleeve 32 of the plug-in connection wire plugged into the lower plug hole 24 of the first current loop of the W-phase plug-in hole group on the plug-in connection unit 8, and then immediately connect the exposed metal wiring part of the unplugged current wire to the W-phase current input line sampling terminal of the newly installed electric energy meter; unplug the current wire plugged into the metal sleeve 32 of the plug-in connection wire plugged into the lower plug hole 26 of the second current loop of the W-phase plug-in hole group on the plug-in connection unit 8, and then immediately connect the exposed metal wiring part of the unplugged current wire to the W-phase current output line sampling terminal of the newly installed electric energy meter.

[0213] Step nine: remove the conductive clamps clamped on the polarity screws S1 and S2 of each current transformer in step two phase by phase.

[0214] That is, the conductive connecting clips clamped on the polarity screws S1 and S2 of each current transformer in step 2 are removed from the polarity screws S1 and S2 of each current transformer.

[0215] Step 10, remove the conductive clamps clamped on the U, V, W, and N phase voltage terminals connected to the power supply on the voltage sampling side of the old electric energy meter in step 1 phase by phase.

[0216] That is, remove the conductive clamps clamped on the U, V, W, and N phase voltage terminals connected to the power supply on the voltage sampling side of the old electric energy meter in step 1.

[0217] Step eleven, record the amount of electricity displayed on the live replacement energy meter device, and obtain the amount of electricity measured by the live replacement energy meter.

[0218] The electricity quantity recorded in step 11 is the electricity quantity measured during the process of replacing the electricity meter with power on.

[0219] Optionally, the method further includes: after recording the amount of electricity measured by the hot-replacement electricity meter, turning off the power supply of the hot-replacement electricity meter device.

[0220] The same and similar parts between the various embodiments in this specification can be referenced to each other.

[0221] Although the present invention has been described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, and all of these shall be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A device for replacing an electric energy meter under power, characterized in that: The device comprises a current and voltage sampling unit (5), an electric energy metering unit (4), a processing unit (3), a display unit (2) and a plug-in connection unit (8); The current and voltage sampling unit (5) has a U-phase current sampling terminal, a V-phase current sampling terminal, a W-phase current sampling terminal, and a U-phase voltage sampling terminal, a V-phase voltage sampling terminal, a W-phase voltage sampling terminal, and an N-phase voltage sampling terminal, and is used to collect the user's power current and power voltage during the process of replacing the electric energy meter with power; The U, V, and W phase current sampling terminals respectively include current incoming line sampling terminals and current outgoing line sampling terminals of the corresponding phases; The electric energy metering unit (4) is connected to the current and voltage sampling unit (5) and is used to measure the amount of electricity used by the user during the process of replacing the electric energy meter with power on, based on the electric current and the electric voltage collected by the current and voltage sampling unit (5); The electric energy metering unit (4) is connected to the processing unit; The processing unit is connected to the display unit (2) and is used to control the display unit (2) to display the measured amount of electricity used by the user during the process of replacing the electric energy meter with electricity; The plug connection unit (8) comprises a U-phase plug hole group (15), a V-phase plug hole group (16), a W-phase plug hole group (17) and an N-phase plug hole group (18); The U, V, and W phase plug hole groups respectively comprise a voltage upper plug hole (20), a voltage lower plug hole (23), a first current loop upper plug hole (22), a first current loop lower plug hole (24), a second current loop upper plug hole (25), and a second current loop lower plug hole (26) of the corresponding phase; in the U, V, and W phase plug hole groups: the first current loop upper plug hole (22) is connected in series with the first current loop lower plug hole (24), and is conductively connected to the current inlet sampling wiring terminal of the corresponding phase of the current and voltage sampling unit (5); the second current loop upper plug hole (25) is connected in series with the second current loop lower plug hole (26), and is conductively connected to the current outlet sampling wiring terminal of the corresponding phase of the current and voltage sampling unit (5); the voltage upper plug hole (20) is conductively connected to the voltage sampling wiring terminal of the corresponding phase of the current and voltage sampling unit (5), and is connected in series with the voltage lower plug hole (23) via a safety device (21); The N-phase plug hole group (18) comprises four neutral line plug holes (27), the four neutral line plug holes (27) are in an H-shaped conductive connection, and any one of the four neutral line plug holes (27) is conductively connected to the N-phase voltage sampling terminal of the current and voltage sampling unit (5); Each plug-in socket of the U, V, and W phase plug-in socket groups, and any one of the four neutral line plug-in sockets (27), is plugged with a plug-in connection wire (9); The free ends of the plug-in connection wires (9) are conductively connected to the metal sleeves (32), and the metal sleeves (32) are covered with an insulating sleeve; The metal sleeves (32) of the plug-in connection wires plugged into the voltage plug-in holes (20), the first current loop plug-in holes (22), and the second current loop plug-in holes (25) of the U, V, and W phase plug-in hole groups, and the metal sleeves (32) of the plug-in connection wires plugged into the N phase plug-in hole group (18) are respectively conductively plugged into conductive connection clips (10); The metal sleeve (32) can be plugged into and matched with the externally leaking metal wiring portion used for connecting the current line and the voltage line of the electric energy meter.

2. The device for replacing an electric energy meter under power supply according to claim 1, characterized in that: The device further comprises a crimping connection unit (7); the crimping connection unit (7) is arranged on a connection line between the current and voltage sampling unit (5) and the plug-in connection unit (8); The crimping connection unit (7) comprises a U-phase bolt crimping hole group (11), a V-phase bolt crimping hole group (12), a W-phase bolt crimping hole group (13) and an N-phase bolt crimping hole group (14); The current inlet bolt crimping holes of the U, V, and W phase bolt crimping hole groups are connected to the current inlet sampling wiring terminals of the corresponding phases of the current and voltage sampling units (5), and are connected to the plug holes (22) on the first current loop of the plug hole group of the corresponding phases of the plug connection unit (8); the current outlet bolt crimping holes of the U, V, and W phase bolt crimping hole groups are connected to the current outlet sampling wiring terminals of the corresponding phases of the current and voltage sampling units (5), and are connected to the plug holes (25) on the second current loop of the plug hole group of the corresponding phases of the plug connection unit (8); The voltage bolt crimping holes of the U, V, and W phase bolt crimping hole groups are connected to the voltage sampling wiring terminals of the corresponding phases of the current and voltage sampling units (5), and are connected to the voltage sampling wiring terminals of the corresponding phase plug hole groups of the plug connection units (8); The N-phase bolt crimping hole group (14) comprises two groups of N-phase bolt crimping holes that are independent of each other; The two groups of N-phase bolt crimping holes are connected one-to-one with the two neutral line plug-in holes (27) of the plug-in connection unit (8), and one group of the two groups of N-phase bolt crimping holes is connected with the N-phase voltage sampling wiring terminal of the current and voltage sampling unit (5).

3. The device for replacing electric energy meters under power according to claim 1, characterized in that: The device further comprises a metering mode switching unit (6); The metering mode switching unit (6) is connected to the electric energy metering unit (4) and is used to send an electric energy metering mode control signal to the electric energy metering unit (4); The electric energy metering unit (4) is used to measure the electric current and the electric voltage collected by the current and voltage sampling unit (5) using a corresponding metering algorithm preset therein after receiving the electric energy metering mode control signal sent by the metering mode switching unit (6); The electric energy metering mode of the electric energy metering unit (4) includes three-phase four-wire electric energy metering, three-phase three-wire electric energy metering and single-phase electric energy metering.

4. The device for replacing an electric energy meter under power supply according to claim 1, characterized in that: The plug-in connection line (9) comprises a soft wire (30); a plug-in head is provided at the first end of the soft wire (30), the plug-in head comprises a first metal plug (28) having one end conductively connected to the first end of the soft wire (30), the free end of the first metal plug (28) being a plug-in head plug-in portion, the plug-in head plug-in portion being able to be plugged and matched with each plug hole of the plug connection unit (8); the remaining portion of the first metal plug (28) except the plug-in head plug-in portion is sleeved with an insulating hand-held sleeve (29); the second end of the soft wire (30) is conductively connected to a metal sleeve (32), the metal sleeve (32) being covered with an insulating sleeve (31), the metal sleeve (32) being able to be sleeved into an exposed metal wiring portion for connecting a current line and a voltage line of an electric energy meter, and being able to be conductively plugged with a conductive wiring clamp (10).

5. The device for replacing an electric energy meter under power supply according to claim 4, characterized in that: A first metal spring sheet (281) is attached to the outer surface of the plug-in connector, the first metal spring sheet (281) is conductively connected to the first end of the soft wire (30), one end of the metal sleeve (32) connected to the soft wire (30) is a blind end, and a second metal spring sheet (321) is attached to the inner surface of the metal sleeve (32).

6. The device for replacing an electric energy meter under power supply according to claim 4, characterized in that: The conductive terminal clamp (10) comprises a second metal plug (33) and a terminal clamp; the terminal clamp comprises a dynamic terminal clamp (37) and a static terminal clamp (34); one end of the static terminal clamp (34) is rotatably connected to the middle of the dynamic terminal clamp (37); the other end of the static terminal clamp (34) is provided with a static clamping portion (341); the corresponding end of the dynamic terminal clamp (37) is provided with a dynamic clamping portion (371); the clamping surfaces of the static clamping portion (341) and the dynamic clamping portion (371) are both conductive; the clamping surfaces of the static clamping portion (341) and the dynamic clamping portion (371) cooperate to form a conductive clamping portion; The second metal plug (33) is fixedly connected to one end of the moving wire clamp (37) away from the moving clamping portion (371); the clamping surfaces of the static clamping portion (341) and the moving clamping portion (371) are both conductively connected to the second metal plug (33) via conductive wires; a wire clamp opening and closing switch (36) is fixed to one end of the moving wire clamp (37) away from the moving clamping portion (371); the wire clamp opening and closing switch (36) is connected to the static wire clamp (34) via a reset spring (35); when the reset spring (35) is in a naturally extended state, the clamping surfaces of the static clamping portion (341) and the moving clamping portion (371) are buckled together to form a conductive clamping portion; The second metal plug (33) can be plug-connected to the metal sleeve (32) of the plug-in connection line (9).

7. The device for replacing an electric energy meter under power supply according to claim 6, characterized in that: A third metal spring sheet (331) is attached to the outer surface of the second metal plug (33).

8. The device for replacing an electric energy meter under power supply according to claim 1, characterized in that: The device also includes a power module; the power module is used to provide power for the device.

9. The device for replacing an electric energy meter under power supply according to claim 1, characterized in that: The device also includes a power upload control button and a GPS positioning module; The GPS positioning module is connected to the processing unit; The power upload control button is connected to the processing unit and is used to send a power upload control signal to the processing unit; The device also includes a first input module and a second input module connected to the processing unit; The first input module is used to input the work mobile phone number of the power staff; the second input module is used to input the mobile phone number of the power user who wants to replace the power meter in the power company; The processing unit is used to perform the following steps after receiving the power upload control signal: The location information of the old electric energy meter is collected through the GPS positioning module as the first location information; Obtaining the electric quantity currently measured by the live replacement electric quantity meter measured by the electric quantity metering unit (4) as the target electric quantity; Remind the power workers to input their work mobile phone numbers through the first input module; receiving the mobile phone number input by the power worker through the first input module as the first mobile phone number; Remind the power staff to input the latest reserved mobile phone number of the power user who is currently replacing the power meter in the power company through the second input module; receiving the mobile phone number input by the power worker through the second input module as the second mobile phone number; The first mobile phone number and the second mobile phone number are concatenated using a preset first concatenation rule to obtain first concatenated data as an AES key; The first position information and the target power are spliced ​​using a preset second splicing rule to obtain second splicing data; Encrypt the second concatenated data using the AES key to obtain a first ciphertext; Calculate the digital summary M of the first ciphertext using the MD5 algorithm; The digital summary M, the AES key and the first ciphertext are concatenated using a preset third concatenation rule to obtain third concatenated data; Encrypt the third concatenated data using a preset RSA public key to obtain a second ciphertext; The second ciphertext is uploaded to the marketing server of the power company.

10. A method for using the device for replacing an electric energy meter under power supply according to any one of claims 1 to 9, characterized in that: Methods include: Step 1: Clamp the conductive wiring clips plugged into the plug-in connection wires plugged into the voltage upper plug-in holes (20) of the U, V, and W phase plug-in hole groups, and the conductive wiring clips plugged into the plug-in connection wires plugged into the N phase plug-in hole group (18), correspondingly onto the U, V, W, and N phase voltage wiring terminals connected to the power supply at the voltage sampling side of the old electric energy meter; Step 2: Clamp the conductive connection clips plugged into the metal sleeves (32) of the plug-in connection wires plugged into the first current loop plug-in holes (22) and the second current loop plug-in holes (25) of the U, V, and W phase plug-in hole groups onto the polarity screws S1 and S2 of the three current transformers connected to the U, V, and W phase current input terminals of the old electric energy meter; Step 3, turning on the power supply of the device for replacing the electric energy meter under power; Step 4, the current wires connected to the old electric energy meter are removed from the current sampling terminals of the old electric energy meter phase by phase, and each time a current wire is removed, the exposed metal wiring portion of the current wire is inserted into the metal sleeve (32) of the plug-in connection wire plugged into the first current loop lower plug-in hole (24) and the second current loop lower plug-in hole (26) of the corresponding phase plug-in hole group on the plug-in connection unit (8); Step 5, the voltage wires connected to the old electric energy meter are removed phase by phase from the voltage sampling terminals of the old electric energy meter, and each time a voltage wire is removed, the exposed metal wiring portion of the voltage wire is inserted into the metal sleeve (32) of the plug-in connection wire plugged into the corresponding phase voltage lower plug-in hole of the corresponding phase plug-in hole group on the plug-in connection unit (8); Step 6: Remove the old energy meter and install the new one; Step 7, pull out each voltage line inserted into the metal sleeve (32) in step 5 phase by phase, and connect the exposed metal wiring part of each pulled out line to the voltage sampling terminal of the corresponding phase on the newly installed electric energy meter; Step 8, each current wire inserted into the metal sleeve (32) in step 4 is pulled out phase by phase, and each time a current wire is pulled out, its exposed metal wiring part is connected to the corresponding current sampling terminal of the corresponding phase on the newly installed electric energy meter; Step 9: Remove the conductive terminal clamps clamped on the polarity screws S1 and S2 of each current transformer in step 2 phase by phase; Step 10: Remove the conductive clamps clamped on the U, V, W, and N phase voltage terminals connected to the power supply on the voltage sampling side of the old electric energy meter in step 1 phase by phase; Step 11: record the amount of electricity displayed on the hot-line replacement energy meter device to obtain the amount of electricity measured by the hot-line replacement energy meter.

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