Semi-integrated meter replacement connecting device and meter replacement method without power failure and electric quantity loss

Abstract

The invention discloses a semi-integrated meter replacement connecting device and a meter replacement method without power outage and electric quantity loss, belongs to the technical field of power supply metering, and solves the problems of power outage and no metering in the meter replacement process of an electric energy meter. According to the invention, a semi-integrated meter changing connecting device is designed, a new meter and an old meter in work are connected in parallel by adopting the semi-integrated meter changing connecting device, and the new meter and the old meter are used for metering together at the stage; the old meter in work is detached, the new meter is installed at the position of the old meter, and only the new meter performs metering independently at the stage; the semi-integrated meter replacement connecting device is disassembled, and meter replacement without power failure and electric quantity loss is completed; the technical scheme of the invention has the advantages of no need of power failure, no loss of electric quantity, 'original-to-original 'and convenience in operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of power supply metering, and relates to a semi-integrated meter replacement connection device and a method for replacing a meter without power outage and without loss of electricity. Background Art

[0002] An electric energy meter is an instrument used to calculate the consumption of electric energy. Classified by the installation wiring method of the meter, it includes direct connection type and indirect connection type (connected through a transformer, hereinafter referred to as direct meter and multiplier meter respectively).

[0003] The direct connection type means that the power lead of the measured line and the lead to the load are directly connected to the corresponding wiring terminals of the watt-hour meter. This type of electric meter directly connected to the primary line is simply called a direct meter. The indirect connection type means that the watt-hour meter is connected to the secondary side with a current or voltage ratio transformation and is not directly connected to the power transmission line. Among power users, there are low-voltage small-power consumption users with a load of up to several kilowatts, and high-voltage industrial and commercial large-power consumption users with a load of at least several tens of thousands of kilowatts. For high-voltage large-power consumption users, in order to isolate high voltage to ensure the safety of personnel and equipment, to accurately measure the electric energy consumption of large-power consumption users, and due to factors such as insulation, materials, and manufacturing, it is necessary to reduce the large voltage and large current in proportion to a measurable value through a transformer for the watt-hour meter to measure. This type of electric meter connected through a transformer is called a multiplier meter.

[0004] Among power users, there are low-voltage small-power consumption users with a load of up to several kilowatts, and high-voltage industrial and commercial large-power consumption users with a load of at least several tens of thousands of kilowatts. For high-voltage large-power consumption users, in order to isolate high voltage to ensure the safety of personnel and equipment, to accurately measure the electric energy consumption of large-power consumption users, and due to factors such as insulation, materials, and manufacturing, it is necessary to reduce the large voltage and large current in proportion to a measurable value through a transformer for the watt-hour meter to measure. This type of electric meter connected through a transformer is called a multiplier meter.

[0005] During the use of the electric energy meter, due to reasons such as the operating environment and time limit, components will age and wear, resulting in inaccurate metering; or with the development of society and the need for functions, the original meter can no longer meet the requirements, and at this time, it is necessary to replace the electric energy meter. When replacing the electric energy meter in the prior art, the first method is to cut off the power of the high-voltage power line where the electric energy meter is located, disassemble the connection between the secondary voltage circuit of the voltage transformer and the secondary metering current circuit of the current transformer of the electric energy meter to be replaced, connect the new electric energy meter to the secondary voltage circuit of the voltage transformer and the secondary metering current circuit of the current transformer, and then restore power. However, this will affect normal power consumption and bring great inconvenience to power users. The second method is to disconnect the secondary voltage circuit and short-circuit the secondary current circuit at the metering combined wiring box for replacement. Although it does not affect the normal power consumption of users, it will cause non-metering. Since the power consumption of high-voltage users is huge, non-metering for a short time will also cause a huge loss of electricity.

[0006] Taking a certain city as an example, there are a total of 5.2214 million users, among which 89,200 are high-voltage users. Assuming the meter replacement time is 15 minutes, the average electricity consumption of every 100 large-power users in the city is calculated, and users with electricity consumption at the average level are found. Under the condition that they are operating at the average power, the average loss of electricity per household during meter replacement is estimated to be 11,714 kWh. Calculated according to the average price to the household, the corresponding electricity fee is 7,876.49 yuan. The total loss of 100 large-power users is 11,714 kWh, and the total loss of electricity fees is 787,600 yuan, causing great losses.

[0007] Taking the commonly used three-phase four-wire electric energy meter as an example, as Figure 14 shown is a typical three-phase four-wire electric energy meter. Figure 15 The tail wiring box of the three-phase four-wire electric energy meter has two fixing screws at both ends. There are a total of 10 wiring terminals in the tail wiring box of the three-phase four-wire electric energy meter, numbered from 1 # to 10. # ; Figure 16 The wiring diagram of the three-phase four-wire electric energy meter connected through voltage transformers and current transformers is as shown in Figure 15 and Figure 16 . The terminals numbered 1 # to 10 # of the three-phase four-wire electric energy meter are respectively used to connect the secondary side three-phase voltages and three-phase currents of the voltage transformers and current transformers.

[0008] It should be noted that whether it is a three-phase four-wire electric energy meter, a three-phase three-wire electric energy meter, a direct meter or a single-phase meter, or all the wiring terminals of the metering combined wiring box are fixed with double-row screws for the purpose of reliable connection, which provides a way for the realization of the power metering device for non-stop meter replacement of the present invention. Summary of the Invention

[0009] The present invention is used to solve the problems of power outage and non-metering existing in the process of meter replacement of electric energy meters.

[0010] The present invention solves the above technical problems through the following technical solutions:

[0011] A semi-integrated meter replacement connection device, comprising: an A-phase connection unit, a B-phase connection unit, a C-phase connection unit, and a neutral wire connection unit;

[0012] The A-phase connection unit includes: a first connection component (1) and three second connection components (2). The three second connection components (2) are respectively connected to the I A+ , U A , I A- terminals of the first connection component (1) by wires; the first connection component (1) is respectively connected to the new meter from 1 # to 3# Position connection, three second connection components (2) are connected to the corresponding positions of the metering combined junction box;

[0013] The B-phase connection unit includes: a first connection component (1) and three second connection components (2). The three second connection components (2) are respectively connected to the I B+ , U B , I B- terminals of the first connection component (1) by wires; the first connection component (1) is respectively connected to the new meter at positions 4 # to 6 # ; three second connection components (2) are connected to the corresponding positions of the metering combined junction box;

[0014] The C-phase connection unit includes: a first connection component (1) and three second connection components (2). The three second connection components (2) are respectively connected to the I C+ , U C , I C- terminals of the first connection component (1) by wires; the first connection component (1) is respectively connected to the new meter at positions 7 # to 9 # ; three second connection components (2) are connected to the corresponding positions of the metering combined junction box;

[0015] The neutral connection unit includes: two second connection components (2). The two second connection components (2) are connected by a wire. One of the second connection components (2) is connected to the new meter at position 10 # ; the other second connection component (2) is connected to the corresponding position of the metering combined junction box;

[0016] The A-phase connection unit, B-phase connection unit, C-phase connection unit and neutral connection unit connect the new meter in parallel with the working old meter, and at the same time establish a voltage and current measurement circuit for the new meter.

[0017] Further, the first connection component (1) includes: an integrated terminal connector (10), a spring pin assembly (11), a first metal screw (12), and a first insulating housing (13); a connection hole is provided on the integrated terminal connector (10), the first insulating housing (13) is a hollow columnar structure, the upper ends of each first insulating housing (13) are respectively communicated with the bottom of the integrated terminal connector (10), the spring pin assemblies (11) are respectively fixedly installed inside the first insulating housings (13) on both sides, the first metal screw (12) is installed inside the first insulating housing (13) in the middle, and the first metal screw (12) freely rotates in the hollow columnar structure of the first insulating housing (13); the length of the first metal screw (12) extending out of the first insulating housing (13) is shorter than the length of the spring pin assembly (11) extending out of the first insulating housing (13).

[0018] Further, a cylindrical cavity is further provided in the lower part inside the first insulating housing (13), and the spring assembly (103) is installed in the cylindrical cavity.

[0019] Further, the second connection component (2) includes: an insulating housing (20), a metal sleeve (21), and a second metal screw (22); a connection piece (211) is provided on one side of the upper part of the metal sleeve (21); a first outer edge protrusion (212) is provided along the outer wall of the metal sleeve (21) below the connection piece (211), and the first outer edge protrusion (212) is stuck on the inner wall of the hollow columnar cylinder of the insulating housing (20); the metal sleeve (21) is nested inside the insulating housing (20), and the bottom end of the metal sleeve (21) extends out of the insulating housing (20); the second metal screw (22) is inserted inside the metal sleeve (21), and the bottom end of the second metal screw (22) extends out of the metal sleeve (21); the connection hole on the integrated terminal connector (10) is correspondingly connected to the connection piece (211) of the second connection component (2).

[0020] Further, a screw connection hole (101) is provided on the front surface of the integrated terminal connector (10), and a plug connection hole (102) is correspondingly provided at the top end. The connection piece (211) is correspondingly connected to the screw connection hole (101) or the plug connection hole (102) through a wire.

[0021] Further, a connection cavity (201) is provided on one side of the insulating housing (20), the connection cavity (201) is communicated with the hollow columnar cylinder of the insulating housing (20), a through hole (202) is provided at the top of the connection cavity (201), a welding hole (213) is provided at the top end of the connection piece (211), and the connection piece (211) is correspondingly and fittingly installed inside the connection cavity (201).

[0022] Further, a first annular protrusion (203) is provided on the inner wall of the middle part of the hollow cylindrical cylinder of the insulating housing (20), and a second annular protrusion (204) is provided on the inner wall of the bottom of the hollow cylindrical cylinder of the insulating housing (20). A cylindrical cavity with upper and lower openings is formed by the inner wall of the hollow cylindrical cylinder of the insulating housing (20), the first annular protrusion (203), and the second annular protrusion (204). The spring assembly (103) is installed in the cylindrical cavity.

[0023] Further, the second connection assembly (2) further includes: an insulating telescopic sheath (30), which is used to cover the exposed parts of the spring pogo pin assembly (11), the exposed part of the first metal screw (12), the part of the bottom end of the metal sleeve (21) extending out of the second insulating housing (20), and the part of the bottom end of the second metal screw (22) extending out of the inside of the metal sleeve (21).

[0024] Further, a second outer edge protrusion (31) is provided on the upper part of the insulating telescopic sheath (30), and the second outer edge protrusion (31) is stuck between the bottom of the spring assembly (103) and the second annular protrusion (204).

[0025] A method for replacing a meter without power interruption and without power loss by using the semi-integrated meter replacement connection device described above includes the following steps:

[0026] Step 1: Connect the new meter in parallel with the working old meter: Loosen the upper row of screws at positions 1 # to 10 # of the new meter, loosen the lower row of screws at positions 1 # 、3 # 、4 # 、6 # 、7 # 、9 # of the new meter, remove the lower row of screws at positions 2 # 、5 # 、8 # 、10 # of the new meter, and remove a row of screws at the corresponding positions of the metering combined wiring box; Screw the first metal screw (12) of the first connection assembly (1) of the A-phase connection unit into the screw position where the screw of the U A terminal of the new meter is removed. The first metal screw (12) plays a fixing role. At this time, the two spring pogo pin assemblies (11) of the first connection assembly (1) of the A-phase connection unit are simultaneously in contact with the I A+ 、I A-Terminal tightening: Screw the 3 second connection components (2) of the A-phase connection unit into the positions of the screws removed from the metering combined wiring box. Similarly, connect the B-phase connection unit and the C-phase connection unit. Screw the second connection component (2) at one end of the neutral wire connection unit into the position of the screw removed from the N terminal of the new meter, and screw the second connection component (2) at the other end of the neutral wire connection unit into the position of the screw removed from the metering combined wiring box. Thus, the parallel connection of the new meter and the old meter is completed, and the new meter simultaneously establishes a voltage and current measurement circuit. At this stage, the new meter and the old meter jointly measure;

[0027] Step 2. Remove the working old meter: Unscrew the screws at positions 1 # to 10 # of the old meter in sequence, and disconnect the wiring at the output end of the metering combined wiring box from the old meter;

[0028] Step 3. Install the new meter in the position of the old meter: Tighten the upper row of screws at positions 1 # to 10 # of the new meter, and fixedly connect the wiring of the new meter to the output end of the metering combined wiring box. At this time, the semi-integrated meter replacement connection device is in parallel with the wiring at the output end of the metering combined wiring box, jointly supplying power to the new meter. At this stage, only the new meter measures alone;

[0029] Step 4. Remove the semi-integrated meter replacement connection device, and tighten the lower row of screws at positions 1 # , 3 # , 4 # , 6 # , 7 # , 9 # of the new meter that have been loosened. Reset and tighten the lower row of screws at positions 2 # , 5 # , 8 # , 10 # of the new meter removed to complete the meter replacement without power outage and without loss of electricity.

[0030] The advantages of the present invention are as follows:

[0031] 1) No power outage required - The meter can be replaced without power outage, without the need to rely on third-party metering equipment. Both the new meter and the old meter are calibrated and qualified meters, and there is no problem of whether the equipment is legal and compliant;

[0032] 2) No electricity loss - Accurate electricity metering is achieved during the meter replacement process, without overcounting or undercounting, and no third-party metering equipment is involved. During the meter replacement period, the electricity is jointly measured by the old meter and the new meter, and the data of the old meter can be traced within the specified storage time limit;

[0033] 3) "Original set in place" - The existing operating equipment and environment do not need to be modified to achieve "in-situ" meter replacement. The meter replacement operation is basically the same as the conventional method process, without adding too many operations;

[0034] 4) Easy to operate - The operation is simple and convenient, and the meter replacement steps are basically the same as normal meter replacement; the cost of tools is extremely low, and no changes need to be made to the original equipment. Description of the Drawings

[0035] Figure 1 It is a schematic diagram of the A-phase connection unit;

[0036] Figure 2 It is a schematic diagram of the neutral wire connection unit;

[0037] Figure 3 It is the main structural view of the first connection component;

[0038] Figure 4 It is the structural sectional view of the first connection component;

[0039] Figure 5 It is the structural sectional view of the second connection component;

[0040] Figure 6 It is the structural schematic diagram of the insulating telescopic sheath;

[0041] Figure 7 It is the schematic diagram of the connection between the old three-phase four-wire energy meter and the secondary sides of the voltage transformer and current transformer through the metering combined wiring box;

[0042] Figure 8 It is the schematic diagram of the new meter being connected in parallel with the working old meter through the semi-integrated meter replacement connection device;

[0043] Figure 9 It is the schematic diagram of removing the working old meter;

[0044] Figure 10 It is the schematic diagram of the wiring connection between the new meter and the output terminal of the metering combined wiring box;

[0045] Figure 11 It is the schematic diagram of removing the semi-integrated meter replacement connection device and completing the installation of the new meter;

[0046] Figure 12 It is the schematic diagram of the upper row of screws loosened on the new meter and the lower row of screws loosened on the new meter;

[0047] Figure 13 It is the schematic diagram of the original wiring being connected to the new meter;

[0048] Figure 14 It is the physical diagram of a typical three-phase four-wire energy meter;

[0049] Figure 15 It is the tail wiring box of the three-phase four-wire energy meter;

[0050] Figure 16It is a wiring diagram of a three-phase four-wire energy meter connected through voltage transformers and current transformers. Specific embodiments

[0051] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0052] The technical solutions of the present invention will be further described below in conjunction with the specification drawings and specific embodiments:

[0053] Embodiment 1

[0054] Taking a common three-phase four-wire energy meter as an example, the semi-integrated meter-changing connection device of this embodiment will be described in detail. The semi-integrated meter-changing connection device includes: an A-phase connection unit, a B-phase connection unit, a C-phase connection unit, and a neutral wire connection unit; among them, the A-phase connection unit, the B-phase connection unit, and the C-phase connection unit have the same structure, and the A-phase connection unit will be described in detail below.

[0055] As Figure 1 shown, the A-phase connection unit includes a first connection component (1) and three second connection components (2). The three second connection components (2) are respectively connected to the I A+ , U A , I A- terminals of the first connection component (1) by wires.

[0056] As Figure 2 shown, the neutral wire connection unit includes two second connection components (2), and the two second connection components (2) are connected by a wire.

[0057] As Figure 3 and Figure 4As shown in the figure, the first connection component (1) is a triple structure, including an integrated terminal connector (10), two spring pin assemblies (11), a first metal screw (12), and three first insulating housings (13); on the front of the integrated terminal connector (10), three screw connection holes (101) are provided, and at the top of the integrated terminal connector (10), three plug connection holes (102) are correspondingly provided. Users can choose to use the screw connection holes (101) or the plug connection holes (102) according to on-site needs; the first insulating housing (13) is a hollow columnar structure, and the upper end of each first insulating housing (13) is respectively communicated with the bottom of the integrated terminal connector (10), and the three first insulating housings (13) are integrally formed with the integrated terminal connector (10); the two spring pin assemblies (11) are respectively fixedly installed inside the first insulating housings (13) corresponding to the I A+ 、I A- terminals, and the first metal screw (12) is installed inside the first insulating housing (13) corresponding to the U A terminal. The first metal screw (12) can freely rotate in the hollow columnar structure of the first insulating housing (13); the length of the first metal screw (12) extending out of the first insulating housing (13) is slightly shorter than the length of the spring pin assembly (11) extending out of the first insulating housing (13), which is determined by the structure of the three-phase four-wire electric energy meter; a cylindrical cavity is further provided in the lower part of the interior of the first insulating housing (13), and the spring assembly (103) is installed in the cylindrical cavity.

[0058] As Figure 5 shown in the figure, the second connection component (2) includes: a second insulating housing (20), a metal sleeve (21), a second metal screw (22), a spring assembly (103), and an insulating telescopic sheath (30);

[0059] The described second insulating housing (20) is a hollow cylindrical cylinder. On one side of the second insulating housing (20), there is a connection cavity (201). The connection cavity (201) communicates with the hollow cylindrical cylinder of the second insulating housing (20). A through hole (202) is opened at the top of the connection cavity (201); the through hole (102) is used for passing the connection wires between two second connection components (2), or the through hole (202) is connected to the screw connection hole (101) or the plug connection hole (102) of the first connection component (1) through a wire; in the middle inner wall of the hollow cylindrical cylinder of the second insulating housing (20), there is a first annular protrusion (203), and in the bottom inner wall of the hollow cylindrical cylinder of the second insulating housing (20), there is a second annular protrusion (204). The inner wall of the hollow cylindrical cylinder of the second insulating housing (20), the first annular protrusion (203), and the second annular protrusion (204) form a cylindrical cavity with openings at both the top and bottom. The spring assembly (103) is installed in the cylindrical cavity; the metal sleeve (21) is a hollow cylindrical cylinder. On one side of the upper part of the metal sleeve (21), there is a connection piece (211). A welding hole (213) is opened at the top of the connection piece (211). The welding hole (213) is used for welding the connection wires. The two ends of the connection wires between the first connection component (1) and the three second connection components (2) respectively pass through the through hole (202) and are welded in the welding hole (213); below the connection piece (211), there is a first outer edge protrusion (212) along the outer wall of the metal sleeve (21). The first outer edge protrusion (212) is stuck on the inner wall of the hollow cylindrical cylinder of the second insulating housing (20); the metal sleeve (21) is nested inside the second insulating housing (20), and the bottom end of the metal sleeve (21) extends out of the second insulating housing (20); the connection piece (211) is correspondingly installed and fitted in the connection cavity (201). The connection piece (211) is correspondingly connected to the screw connection hole (101) or the plug connection hole (102) through a wire. The second metal screw (22) is inserted inside the metal sleeve (21), and the bottom end of the second metal screw (22) extends out of the inside of the metal sleeve (21). The second metal screw (22) can rotate freely inside the metal sleeve (21).

[0060] Such as Figure 6As shown, the insulating telescopic sheath (30) is used to cover the exposed part of the spring pin assembly (11), the exposed part of the first metal screw (12), the part of the bottom end of the metal sleeve (21) extending out of the second insulating housing (20), and the part of the bottom end of the second metal screw (22) extending out of the interior of the metal sleeve (21), playing a role of insulation protection. A second outer edge protrusion (31) is provided on the upper part of the insulating telescopic sheath (30), and the second outer edge protrusion (31) is stuck between the bottom of the spring assembly (103) and the second annular protrusion (204). The insulating telescopic sheath (30) is also used to cover the exposed metal parts of the first spring pin assembly (12) and the second spring pin assembly (13) to play a role of insulation protection.

[0061] Embodiment 2

[0062] Taking a three-phase four-wire energy meter as an example, this embodiment introduces a method for replacing the meter without power interruption and without loss of electricity; the present invention adopts a double parallel connection method, combines with the semi-integrated meter replacement connection device in Embodiment 1, and utilizes the basic principle of circuit parallel connection to realize the original meter replacement of the energy meter without power interruption and without loss of electricity without any modification to the original wiring.

[0063] The method for replacing the meter without power interruption and without loss of electricity is as follows:

[0064] (1) In the initial state, the old meter is connected to the secondary sides of the voltage transformer and the current transformer through the metering combined wiring box. Taking... as an example, the 1... end and the 3... end of the old meter are connected to the secondary side of the A-phase current transformer through the metering combined wiring box, and the 2... end and the 10... end (neutral line) of the old meter are connected to the secondary side of the A-phase voltage transformer through the metering combined wiring box; the 4... end and the 6... end of the old meter are connected to the secondary side of the B-phase current transformer through the metering combined wiring box, and the 5... end and the 10... end (neutral line) of the old meter are connected to the secondary side of the B-phase voltage transformer through the metering combined wiring box; the 7... end and the 9... end of the old meter are connected to the secondary side of the C-phase current transformer through the metering combined wiring box, and the 8... end and the 10... end (neutral line) of the old meter are connected to the secondary side of the C-phase voltage transformer through the metering combined wiring box. Figure 7 For example, the 1 # end and the 3 # end of the old meter are connected to the secondary side of the A-phase current transformer through the metering combined wiring box, the 2 # end and the 10 # end (neutral line) of the old meter are connected to the secondary side of the A-phase voltage transformer through the metering combined wiring box; the 4 # end and the 6 # end of the old meter are connected to the secondary side of the B-phase current transformer through the metering combined wiring box, the 5 # end and the 10 # end (neutral line) of the old meter are connected to the secondary side of the B-phase voltage transformer through the metering combined wiring box; the 7 # end and the 9 # end of the old meter are connected to the secondary side of the C-phase current transformer through the metering combined wiring box, the 8 # end and the 10 # end (neutral line) of the old meter are connected to the secondary side of the C-phase voltage transformer through the metering combined wiring box.

[0065] (2) Connect the new meter in parallel with the working old meter (the first parallel connection). As shown in... specifically: Loosen the 1... end of the new meter Figure 8 As shown, specifically: Loosen the 1 #To 10 # Upper row of screws at the position, loosen the new meter 1 # 、3 # 、4 # 、6 # 、7 # 、9 # Lower row of screws at the position, remove the new meter 2 # 、5 # 、8 # 、10 # Lower row of screws at the position, remove a row of screws at the corresponding position of the metering combined junction box; Screw the first metal screw (12) of the first connection component (1) of the A-phase connection unit into the U of the new meter A The screw position where the terminal is removed, the first metal screw (12) plays a fixing role. At this time, the 2 spring thimble components (11) of the first connection component (1) of the A-phase connection unit are simultaneously in contact with the I of the new meter A+ 、I A- Terminal and press tightly; Screw the 3 second connection components (2) of the A-phase connection unit into the positions of the screws removed from the metering combined junction box correspondingly; The connection of the B-phase connection unit and the C-phase connection unit is similar to that of the A-phase connection unit, which will not be elaborated here; Screw the second connection component (2) at one end of the neutral line connection unit into the screw position where the N terminal of the new meter is removed, and screw the second connection component (2) at the other end of the neutral line connection unit into the position of the screw removed from the metering combined junction box correspondingly; Thus, the parallel connection of the new meter and the old meter is completed, and the new meter simultaneously establishes a voltage and current measurement circuit. At this stage, the new meter and the old meter jointly measure. Record the time when the new meter and the old meter jointly measure as t. During the t time period, since the new meter and the old meter are in parallel, the user's electricity consumption is the sum of the two meters, so there will be no over-measurement or under-measurement.

[0066] (3) Remove the working old meter, as Figure 9 shown, unscrew the screws of the old meter from 1 # to 10 # in sequence, and disconnect the wiring at the output end of the metering combined junction box from the old meter.

[0067] (4) Install the new meter in the position of the old meter, as Figure 10 shown, tighten the upper row of screws of the new meter from 1 # to 10 # in position, and fixedly connect the wiring of the new meter to the output end of the metering combined junction box. At this time, the semi-integrated meter replacement connection device is in parallel with the wiring at the output end of the metering combined junction box (the second parallel connection), and jointly supplies power to the new meter. At this stage, only the new meter measures alone.

[0068] (5) Finally, as Figure 11 shown, remove the semi-integrated meter replacement connection device, and loosen the new meter 1 # 、3 #, 4 # , 6 # , 7 # , 9 # Tighten the lower row of screws at the position, and the new meter 2 will be removed. # , 5 # , 8 # , 10 # Reset and tighten the lower row of screws at the position to complete the meter replacement without power outage and power loss.

[0069] As Figure 12 shown, it is a schematic diagram of the upper row of screws loosened for the new meter and the lower row of screws loosened for the new meter. Both the upper row of screws loosened for the new meter and the lower row of screws loosened for the new meter remain connected to the terminal block, and there is a space below the screws inside the terminal block for the original wiring to pass through; the spring thimble assembly (11) presses against the loosened new meter 1 # , 3 # , 4 # , 6 # , 7 # , 9 # at the position of the lower row of screws. The first metal screw (12) is screwed into the lower row of screw holes of the removed new meter 2 # , 5 # , 8 # , 10 # at the position and there is a space for the original wiring to pass through; in this way, the semi-integrated meter replacement connection device constructs another wiring loop through the outside of the terminal blocks at positions 1 # to 10 # so that the parallel connection of the semi-integrated meter replacement connection device and the disassembly and assembly of the original wiring do not affect each other.

[0070] As Figure 13 shown, after removing the old meter, insert the original wiring into the terminal blocks at positions 1 # to 10 # of the new meter, and then tighten the upper row of screws of the new meter. In this way, the parallel connection of the semi-integrated meter replacement connection device and the original wiring jointly supply power to the new meter.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A semi-integrated meter replacement connection device, characterized in that, Including: Phase A connection unit, Phase B connection unit, Phase C connection unit and neutral line connection unit; The described phase A connection unit includes: a first connection component (1) and three second connection components (2). The three second connection components (2) are respectively connected to the I A+ , U A , I A- terminals of the first connection component (1) by wires; the first connection component (1) is respectively connected to the positions from new meter 1 # to 3 # , and the three second connection components (2) are connected to the corresponding positions of the metering combined wiring box; The described phase B connection unit includes: a first connection component (1) and three second connection components (2). The three second connection components (2) are respectively connected to the I B+ , U B , I B- terminals of the first connection component (1) by wires; the first connection component (1) is respectively connected to the new meter 4 # to 6 # positions, and the three second connection components (2) are connected to the corresponding positions of the metering combined wiring box; The described phase C connection unit includes: a first connection component (1) and three second connection components (2). The three second connection components (2) are respectively connected to the I C+ , U C , I C- terminals of the first connection component (1) by wires; the first connection component (1) is respectively connected to the positions of the new meter from 7 # to 9 # , and the three second connection components (2) are connected to the corresponding positions of the metering combined wiring box; The described neutral wire connection unit includes: two second connection components (2), which are connected by a wire between the two second connection components (2), and one of the second connection components (2) is connected to the new meter 10 # at the position, and the other second connection component (2) is connected to the corresponding position of the metering combined wiring box; The Phase A connection unit, Phase B connection unit, Phase C connection unit and neutral line connection unit connect the new meter in parallel with the working old meter, and at the same time establish a voltage and current measurement circuit for the new meter.

2. The semi-integrated meter replacement connection device according to claim 1, characterized in that, The first connection component (1) includes: an integrated terminal connector (10), a spring ejector pin assembly (11), a first metal screw (12) and a first insulating housing (13); a connection hole is provided on the integrated terminal connector (10), the first insulating housing (13) is a hollow columnar structure, the upper ends of each first insulating housing (13) communicate with the bottom of the integrated terminal connector (10) respectively, the spring ejector pin assemblies (11) are fixedly installed inside the first insulating housings (13) on both sides, the first metal screw (12) is installed inside the first insulating housing (13) in the middle, and the first metal screw (12) rotates freely in the hollow columnar structure of the first insulating housing (13); the length of the first metal screw (12) extending out of the first insulating housing (13) is shorter than the length of the spring ejector pin assembly (11) extending out of the first insulating housing (13).

3. The semi-integrated meter replacement connection device according to claim 2, wherein, A cylindrical cavity is further provided in the lower part inside the first insulating housing (13), and a spring assembly (103) is installed in the cylindrical cavity.

4. The semi-integrated meter replacement connection device according to claim 2, characterized in that, The second connection component (2) includes: an insulating housing (20), a metal sleeve (21), and a second metal screw (22); a connection piece (211) is provided on one side of the upper part of the metal sleeve (21); a first outer edge protrusion (212) is provided along the outer wall of the metal sleeve (21) below the connection piece (211), and the first outer edge protrusion (212) is stuck on the inner wall of the hollow columnar cylinder of the insulating housing (20); the metal sleeve (21) is nested inside the insulating housing (20), and the bottom end of the metal sleeve (21) extends out of the insulating housing (20); the second metal screw (22) is inserted inside the metal sleeve (21), and the bottom end of the second metal screw (22) extends out of the inside of the metal sleeve (21); the connection hole on the integrated terminal connector (10) is correspondingly connected to the connection piece (211) of the second connection component (2).

5. The semi-integrated meter replacement connection device according to claim 4, characterized in that, A screw connection hole (101) is provided on the front surface of the integrated terminal connector (10), and a plug connection hole (102) is correspondingly provided at the top end. The connection piece (211) is correspondingly connected to the screw connection hole (101) or the plug connection hole (102) through a wire.

6. The semi-integrated meter replacement connection device according to claim 5, characterized in that A connection cavity (201) is provided on one side of the insulating housing (20), the connection cavity (201) communicates with the hollow columnar cylinder of the insulating housing (20), a through hole (202) is provided at the top of the connection cavity (201), a welding hole (213) is provided at the top end of the connection piece (211), and the connection piece (211) is correspondingly and fittingly installed in the connection cavity (201).

7. The semi-integrated meter replacement connection device according to claim 2, wherein A first annular protrusion (203) is provided on the inner wall of the middle part of the hollow cylindrical cylinder of the insulating housing (20), and a second annular protrusion (204) is provided on the inner wall of the bottom of the hollow cylindrical cylinder of the insulating housing (20). The inner wall of the hollow cylindrical cylinder of the insulating housing (20), the first annular protrusion (203), and the second annular protrusion (204) form a cylindrical cavity with openings at both the top and the bottom, and the spring assembly (103) is installed in the cylindrical cavity.

8. The semi-integrated meter replacement connection device according to claim 4, characterized in that, The second connection assembly (2) further includes: an insulating telescopic sheath (30), which is used to cover the exposed part of the spring pogo pin assembly (11), the exposed part of the first metal screw (12), the part of the bottom end of the metal sleeve (21) extending out of the second insulating housing (20), and the part of the bottom end of the second metal screw (22) extending out of the interior of the metal sleeve (21).

9. The semi-integrated meter replacement connection device according to claim 8, wherein, A second outer edge protrusion (31) is provided on the upper part of the insulating telescopic sheath (30), and the second outer edge protrusion (31) is stuck between the bottom of the spring assembly (103) and the second annular protrusion (204).

10. A method for replacing a meter without power interruption and power loss, which uses the semi-integrated meter replacement connection device according to any one of claims 1-9, is characterized in that, Comprising the following steps: Step 1. Connect the new meter in parallel with the old meter in operation: Loosen the upper row of screws at positions 1 # to 10 # of the new meter, loosen the upper row of screws at positions 1 # and 3 # and 4 # and 6 # and 7 # and 9 # of the new meter, remove the lower row of screws at positions 2 # and 5 # and 8 # and 10 # of the new meter, and remove a row of screws at the corresponding positions of the metering combined wiring box; Screw the first metal screw (12) of the first connection component (1) of the A-phase connection unit into the screw position where the U A terminal of the new meter was removed. The first metal screw (12) plays a fixing role. At this time, the two spring thimble components (11) of the first connection component (1) of the A-phase connection unit are simultaneously in contact with the I A+ and I A- terminals of the new meter and press tightly; Screw the three second connection components (2) of the A-phase connection unit into the positions of the screws removed from the metering combined wiring box. Similarly, connect the B-phase connection unit and the C-phase connection unit; Screw the second connection component (2) at one end of the neutral connection unit into the screw position where the N terminal of the new meter was removed, and screw the second connection component (2) at the other end of the neutral connection unit into the position of the screw removed from the metering combined wiring box; Thus, the parallel connection of the new meter and the old meter is completed, and the new meter simultaneously establishes a voltage and current measurement circuit. At this stage, the new meter and the old meter jointly measure; Step 2. Remove the old meter in operation: Unscrew the screws at positions 1 # to 10 # of the old meter in sequence, and disconnect the wiring at the output end of the metering combined wiring box from the old meter; Step 3: Install the new meter in the position of the old meter: Tighten the upper row of screws of the new meter 1 # to 10 # Connect the wiring of the new meter to the output terminal of the metering combined wiring box. At this time, the wiring of the semi-integrated meter replacement connection device is in parallel with the output terminal of the metering combined wiring box to jointly supply power to the new meter. Only the new meter measures independently at this stage; Step 4: Remove the semi-integrated meter replacement connection device, and tighten the lower row of screws at the positions of the new meters 1 # , 3 # , 4 # , 6 # , 7 # , 9 # , and tighten the lower row of screws at the positions of the new meters 2 # , 5 # , 8 # , 10 # to their original positions and tighten them, completing the meter replacement without power outage and without loss of electricity

Images