Quick-switching type electric energy metering combined junction box

Abstract

The invention discloses a quick-switching type electric energy metering combined junction box and belongs to the metering field. A plurality of inlet wire binding posts and a plurality of outlet wire binding posts are respectively arranged in the junction box shell; a quick-cutting mechanism module is arranged between the plurality of wire inlet wiring terminals and the plurality of wire outlet terminals; a linkage sliding rod is arranged above the quick cutting mechanism module; a clamping block type locking mechanism is arranged at the tail end of the sliding rod; and a transparent protective cover is arranged above the junction box shell. After the sliding rod is pushed to a meter adjusting position, the clamping block is upwards shifted, and the sliding rod is locked, so that a metering state can be switched to a meter adjusting state; and the clamping block is pulled downwards to unlock the sliding rod, the sliding rod is pushed to the metering position, and the meter adjusting state can be recovered to the metering state. A quick switching mechanism is adopted, so that quick switching between a meter adjusting state and a metering state is realized, and manual repeated assembly and disassembly actions in each link in a meter state switching process are avoided; the operation time consumption can be effectively reduced, the working efficiency of meter adjustment is improved, and the error rate of manual assembly and disassembly is reduced.

Description

Technical Field

[0001] The invention belongs to the field of metering devices, and in particular relates to a junction box used for electric energy metering devices. Background Art

[0002] The electric energy metering device is a metering instrument used to measure and record the amount of power generated, the amount of power supplied, the amount of power consumed by the plant, the amount of power lost by the line and the amount of power consumed by the users.

[0003] The electric energy metering device refers to the whole composed of an electric energy meter (abbreviated as electric meter or watt-hour meter), a metering transformer (including voltage transformer and current transformer) and secondary connecting wires.

[0004] With the continuous advancement of optimizing the electricity business environment, the use of transformer-type energy metering devices has become more and more widespread. In order to ensure the safety of meter replacement personnel, it is necessary to install an energy metering joint junction box in the secondary circuit to realize the connection between the transformer and the energy meter, collection terminal and other equipment.

[0005] The electric energy metering joint junction box (also called secondary junction box) is a component of the electric energy metering device and is used to connect the electric energy metering device with the external circuit.

[0006] In the secondary junction box, there are usually two rows of upper and lower multiple wiring terminals (terminals for short), each terminal represents a circuit connection point; usually the upper row of terminals is used to connect with the various wiring terminals of the electric energy meter, and the lower row of terminals is used to connect with external circuits or devices; between some terminals in the upper and lower rows, there is a detachable connecting copper sheet (connecting sheet for short), and by tightening or untightening these different connecting sheets with screws, the electrical connection relationship between the terminals in the upper and lower rows can be achieved, and different circuit functions can be achieved. For example, in the normal metering state, it is a wiring connection relationship. When the electric energy meter is replaced and verified, the power-off and verification functions of the relevant meters (referred to as meter replacement) are realized by toggling the connecting copper sheet in the junction box.

[0007] To ensure that the meter is powered off during the meter replacement process (i.e., no voltage or current input), it is necessary to use a screwdriver to move the connecting copper plate (referred to as the connecting plate or adjustment plate) in the junction box to switch the electricity meter between the metering state and the meter replacement state.

[0008] Specifically, the wiring mode of the existing transformer type electric energy metering device is as follows: Figure 1 shown. Figure 1In the figure, the electric energy meter and the collection terminal located above the junction box are connected to the voltage transformer (abbreviated as X-phase voltage transformer in the figure, X=A, B, C) and current transformer (abbreviated as X-phase current transformer in the figure, X=A, B, C) located below the junction box through the junction box; the rightmost group of wiring in the figure corresponds to the neutral line in the three-phase circuit, and the incoming and outgoing ends of the neutral line are directly connected.

[0009] The live metal parts on the junction box panel are exposed without any insulation shielding.

[0010] Before replacing the meter, you need to manually adjust the wiring on the junction box panel to cut off the power to the meter.

[0011] The schematic diagram of the principle of switching the meter from the measuring state to the meter replacement state is as follows Figure 2 As shown in Figure 2 It can be seen that to switch from the metering state to the meter replacement state, the secondary circuit of each phase current transformer needs to be short-circuited (because the secondary side of the current transformer cannot be open-circuited) and the voltage terminal needs to be disconnected (or disconnected, because the secondary side of the voltage transformer cannot be short-circuited), so that there is no voltage access and no current flowing between the input ends of the electric energy meter and the collection terminal.

[0012] Specifically, Figure 1 , Figure 2 In the diagram, three colors are used to represent the circuit channels of the three-phase circuits A, B, and C; the wiring mode of the electric energy metering device belongs to the metering state of the electric energy meter before the meter replacement operation ( Figure 2 In this state, move each copper sheet (white arrows in the figure indicate the moving direction of each copper sheet); by manually changing and adjusting the connection position of each copper sheet, the electrical connection relationship of each phase voltage circuit and current circuit on the junction box panel can be changed, thereby achieving Figure 2 The electrical connection relationship of the lower part puts the meter in a power-off state, realizing the switching (or conversion) of the meter replacement state.

[0013] exist Figure 2 In the diagram, each phase circuit is divided into two columns of terminal blocks, the left column is the voltage circuit terminal block, and the connecting piece V of each phase is moved up and down. i , the "on / off" function switching of the phase voltage circuit can be realized; the column on the right is the terminal group of the current circuit, and the "on / off" function switching of the phase current circuit can be realized by moving the connecting piece Ii of each phase left and right.

[0014] In this process, Figure 2Taking the junction box structure shown in as an example, the meter changer needs to manually and repeatedly loosen and tighten 12 screws and move 6 copper sheets. After completing the meter change work, it is necessary to switch the state again to restore the meter from the meter change state to the metering state. Since multiple screws need to be loosened and tightened and the connecting pieces need to be moved, the meter change efficiency and operation speed of the meter changer are low. At the same time, because the junction box panel is in the open state, the metal parts of each screw and connecting piece are in an exposed state with electricity. When switching the meter state, the meter changer may accidentally touch the live parts and get an electric shock. On the other hand, if the personnel make a wiring error during this process, it will cause the transformer and other equipment to explode and cause an accident.

[0015] To ensure the safety of on-site operations, the invention patent with the authorization announcement date of 2022.01.18 and the authorization announcement number of CN 112290491B discloses "an insulation device for preventing accidental contact of an electric energy metering joint junction box", including a shielding body, which is a rectangular structure used to cooperate with the metering box and can shield the live terminals in the metering box; the shielding body is provided with a voltage protection component, which includes a first baffle, and a second baffle and a third baffle connected to both ends of the first baffle, and the voltage protection component is U-shaped; the first baffle is matched between the voltage terminal and the voltage connecting piece; the second baffle and the third baffle are matched on both sides of the voltage terminal; the shielding body is also provided with a connection part for connecting to the metering box. This technical solution places a baffle between the voltage terminal and the voltage connecting piece to clearly disconnect the voltage terminal and the voltage connecting piece, so as to avoid the connection between the voltage connecting piece and the voltage terminal, which may cause electric shock to the staff. However, this device only reduces the chance of electric shock caused by accidental touch by the personnel who change the meter. During the meter replacement process, it is still necessary to turn the screws and adjust the paddles in sequence to switch the meter operating status. This cannot improve work efficiency, nor can it effectively prevent accidents caused by personnel operating errors.

[0016] The invention patent with the authorization announcement date of 2024.04.05 and the authorization announcement number of CN 113820523 B discloses "a high-efficiency electricity metering joint junction box", including a box body and a box cover, and a plurality of wiring holes are arranged in the box body; the rotating connection unit is arranged in the wiring hole, including a telescopic component and a rotating component; the telescopic component includes a first sleeve, a second sleeve, and an elastic member, and the rotating component includes a rotating core, a limiter, and a clamping member, the second sleeve slides axially in the first sleeve, and the sliding of the second sleeve drives the rotating core to rotate in the second sleeve, and the first sleeve, the second sleeve, and the rotating core are concentric. This technical solution provides a three-phase three-wire electric energy metering joint junction box with a rotating element by embedding components such as a rotating core, a limiter, a clamping member, and a telescopic component in the junction box, which can effectively reduce the workload of personnel when switching the meter status and improve the work efficiency, but its rotating unit is prone to jamming and being unable to rotate during operation, resulting in the failure of the meter status switching during the operation.

[0017] The invention patent application with the application publication date of 2020.09.11 and the application publication number of CN 111650411 A discloses "a combined junction box and electric energy metering device", including a box body, and current terminals, voltage terminals, current connecting pieces, voltage connecting pieces, voltage loops, current loops and test holes arranged on the box body; wherein the current terminals and voltage terminals are used to connect to external cables; the test holes are respectively arranged on the voltage loop and the current loop, and the test holes can be electrically connected to the test line connectors of the external test instrument, and are used to test the voltage loop and the current loop on the box body; the conductive elastic sheet is arranged obliquely in the test hole, which is used to clamp the test line connector inserted into the test hole. It improves the installation stability of the test line connector and improves the safety of the test by using the conductive elastic sheet arranged obliquely in the test hole to clamp the test line connector. However, this modification method does not effectively solve the problem that the meter operation status needs to be manually switched.

[0018] In addition, the utility model patent with the authorization announcement date of 2014.09.24 and the authorization announcement number of CN 203850784 U discloses a "combined junction box for electric energy meters with voltage connecting pieces that can be turned on and off without being dislocated"; the utility model patent with the authorization announcement date of 2014.09.24 and the authorization announcement number of CN 203850785 U discloses a "combined junction box for electric energy meters with guillotine switch-type voltage connecting pieces". The above technical scheme develops a metering combined junction box with distribution voltage connecting pieces that can be turned on and off without being dislocated by modifying the voltage pick structure in the junction box. Although this modification method can effectively solve the problems of difficult docking and easy spark generation when moving the voltage pick, the meter changer still needs to manually adjust the current loop wiring, and it is also impossible to avoid problems such as manual misoperation and accidental contact with live parts.

[0019] In summary, there is an urgent need to develop a junction box that can quickly and accurately switch the meter status to replace the current manual switching method, while improving the efficiency of meter replacement, preventing people from electric shock and reducing the probability of accidents. Summary of the invention

[0020] The technical problem to be solved by the present invention is to provide a fast-cut electric energy metering joint junction box. Based on the switching principle of the travel switch, a topological structure capable of simultaneously switching the phase voltage and current loop is designed. On this basis, a slide bar is installed to realize the simultaneous switching of three phases, and a card-type locking mechanism is added at the end of the slide bar to prevent misoperation by personnel; at the same time, the exposed copper parts on the junction box are independently packaged to prevent electric shock to personnel.

[0021] The technical solution of the present invention is to provide a fast-cut electric energy metering combined junction box, including an incoming terminal and an outgoing terminal located in a junction box housing, and is characterized in that:

[0022] On both sides of the junction box housing, incoming wiring terminals and outgoing wiring terminals are respectively arranged;

[0023] A quick-cut mechanism module is provided between the incoming wiring terminal and the outgoing wiring terminal;

[0024] A linkage slide bar is arranged above the quick-cut mechanism module to synchronously control the movement of the quick-cut mechanism module;

[0025] At the end of the slide bar, a block-type locking mechanism is provided to prevent accidental movement or misoperation by personnel;

[0026] A transparent protective cover is arranged above the junction box housing.

[0027] Specifically, there are multiple incoming terminals; and there are multiple outgoing terminals.

[0028] Furthermore, the multiple incoming terminals are respectively connected to the output ends of the voltage transformer and the current transformer of each phase; the multiple outgoing terminals are correspondingly connected to the connection terminals of each phase of the electric energy meter and the collection terminal.

[0029] Specifically, there are three quick-cut mechanism modules; the quick-cut mechanism modules include a travel switch with a button.

[0030] Furthermore, the three quick-cut mechanism modules are respectively arranged corresponding to the positions of the corresponding incoming wiring terminals and outgoing wiring terminals of the three-phase electricity.

[0031] Specifically, the linkage slide bar is arranged above the buttons of the three travel switches, and the actions of the quick-cut mechanism modules are synchronously controlled through the movable sliding of the linkage slide bar.

[0032] Furthermore, the synchronous control of the actions of each quick-cut mechanism module includes synchronously pressing or releasing buttons of each travel switch.

[0033] Specifically, the block-type locking mechanism is a rotatable convex block structure mounted on a shaft;

[0034] When the block of the block-type locking mechanism is moved in one direction, the linkage slide bar can slide left and right at will, and it is in the unlocked state;

[0035] When the block of the block-type locking mechanism is moved in another direction, the block is fixed between the structural member and the linkage slide bar, so that the linkage slide bar cannot slide freely along its sliding direction, and is in a locked state.

[0036] The quick-cut electric energy metering combined junction box of the present invention is implemented according to the following steps when it is necessary to switch the quick-cut junction box from the metering state to the meter replacement state:

[0037] 1) Check the electrical status of the junction box casing;

[0038] 2) Open the package and remove the protective case;

[0039] 3) Push the slide bar to the table change position;

[0040] 4) Push the card block upward to lock the slide bar;

[0041] 5) Cover with protective case;

[0042] 6) The metering state is switched to the meter replacement state.

[0043] Similarly, when the quick-cut junction box needs to be switched from the meter replacement state to the metering state, follow the steps below:

[0044] a) Remove the protective case;

[0045] b) Push the card downward to unlock the slide bar;

[0046] c) Push the slide bar to the metering position;

[0047] d) Cover with protective shell and seal;

[0048] e) The meter replacement status is restored to the measuring status.

[0049] The quick-cut electric energy metering combined junction box of the present invention realizes rapid conversion between the meter replacement state and the metering state by adopting a quick-cut mechanism, thereby avoiding manual repetitive assembly and disassembly actions in each link of the meter state switching process; while improving the efficiency of meter replacement work, the manual assembly and disassembly error rate is reduced; by setting a card block locking mechanism, it is effectively prevented from accidental contact and misoperation by personnel; by independently packaging the components, the probability of electric shock to personnel is reduced.

[0050] Compared with the prior art, the advantages of the present invention are:

[0051] 1. With the technical solution of the present invention, when it is necessary to enter the meter-changing state, the slide bar is pushed to the meter-changing position and the card block is pulled up to lock the slide bar, thereby conveniently switching the metering state to the meter-changing state; when it is necessary to enter the metering state, the card block is pulled down to unlock the slide bar and the slide bar is pushed to the metering position, thereby restoring the meter-changing state to the metering state. The entire switching operation process is simple and convenient;

[0052] 2. The technical solution of the present invention adopts a quick-cut mechanism to realize the rapid conversion between the meter replacement state and the metering state, avoiding the manual repetitive assembly and disassembly actions in each link of the meter switching state process; it can effectively reduce the operation time consumption, improve the efficiency of meter replacement work, and reduce the error rate of manual assembly and disassembly;

[0053] 3. The technical solution of the present invention, by providing a block-type locking mechanism and independently packaging the components, can effectively prevent people from accidentally touching or operating the components, thereby reducing the probability of electric shock. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a wiring mode schematic diagram of an existing transformer type electric energy metering device;

[0055] Figure 2 It is a schematic diagram of the state switching principle of the electric energy metering device;

[0056] Figure 3a It is a schematic diagram of the state switching operation flow of the existing electric energy metering device;

[0057] Figure 3b It is a box-and-whisker diagram of the time consumption of each link of the state switching of the existing electric energy metering device;

[0058] Figure 4a and Figure 4b It is a schematic diagram of the switching principle of the travel switch;

[0059] Figure 5 It is a schematic diagram of the circuit topology structure of the quick-cut electric energy metering joint junction box of the present invention;

[0060] Figure 6 It is a PCB circuit board design drawing of the quick-cut electric energy metering joint junction box of the present invention;

[0061] Figure 7 It is a 3D structural schematic diagram of the quick-cut electric energy metering joint junction box of the present invention;

[0062] Figure 8a and Figure 8b It is a schematic diagram of the action of the slide bar driving button of the present invention;

[0063] Figure 9a It is a structural schematic diagram of the card block type locking mechanism of the present invention in an unlocked state;

[0064] Figure 9b It is a structural schematic diagram of the card block type locking mechanism of the present invention in a meter changing state;

[0065] Fig.10 It is a structural schematic diagram of a real junction box sample of the present invention;

[0066] Fig.11a It is a schematic diagram of the operation flow of the quick-cut junction box of the present invention;

[0067] Fig.11a It is a schematic diagram of the operation flow of switching the quick-cut junction box of the present invention from the metering state to the meter replacement state;

[0068] Fig.11b The invention is a schematic block diagram of the operation flow of switching the quick-cut junction box from the meter changing state to the metering state. DETAILED DESCRIPTION

[0069] The present invention will be further described below in conjunction with the accompanying drawings.

[0070] For the junction box structure of the existing transformer-type electric energy metering device, the time consumption of state switching of 10 installation personnel in 10 meter replacement processes was statistically analyzed, and the following results were obtained: Figure 3a The state switching flow chart shown in the figure shows that the median time consumed by the state switching link is Figure 3a The time-consuming box-line diagram of each link of state switching is shown in Figure 3b shown.

[0071] Depend on Figure 3a As shown in the figure, the median total time consumption for state switching is 619 seconds, of which repetitive manual assembly and disassembly actions consume a total of 519 seconds, accounting for 83.84% of the total time consumption. If the manual assembly and disassembly actions are eliminated, the operation time consumption can be effectively reduced and the efficiency of meter replacement can be improved.

[0072] The technical idea of ​​the present invention is to adopt a product structure that can be switched in the circuit and has no exposed electrical contacts in the mechanical structure, which is used to replace the connecting piece in the existing junction box and change the fixing method of the connecting piece by adjusting the screw, and change the position of the connecting piece to change the connection mode between the input and output wiring terminals, thereby finally achieving the purpose of the invention of conveniently changing the wiring mode between the input and output wiring terminals, preventing electric shock, and improving work efficiency.

[0073] 1. Switching principle of travel switch:

[0074] The switching principle diagram of LX19K-B travel switch is as follows Figure 4a and Figure 4b shown.

[0075] Figure 4a In the example, when the button of the travel switch is not pressed, circuit 1 is connected and circuit 2 is disconnected. The circuit connection relationship at this time is defined as the measuring state.

[0076] Figure 4b In the example, when the top button of the travel switch is pressed, circuit 2 is connected and circuit 1 is disconnected. The circuit connection relationship at this time is defined as the meter replacement state.

[0077] Based on the switching principle of the above-mentioned travel switch, the technical solution of the present invention proposes the design principle and operation process of a quick-cut electric energy metering combined junction box based on the switching principle of the travel switch and through a set of quick-cut mechanisms to realize the switching of the metering state and the meter replacement state of the transformer-type electric energy metering device, which is specifically described as follows.

[0078] 2. Quick-cutting mechanism design:

[0079] based on Figure 4a and Figure 4b Based on the travel switch principle shown in the figure, the circuit topology of the improved quick-cut electric energy metering joint junction box of the present invention is designed as follows: Figure 5 shown.

[0080] In the figure, U Xini is the voltage input terminal of phase X (X=A, B, C), U Xouti is the i-th voltage output terminal of phase X (i=1,2); I Xini is the i-th current input terminal of phase X (X=A,B,C;i=1,2), I Xouti is the i-th current outlet terminal of phase X (X=A, B, C, i=1, 2); U Nin It is the incoming terminal of the neutral line, U Xouti It is the i-th outlet terminal of the neutral line.

[0081] For a three-phase power supply circuit, each phase has a voltage input terminal and two voltage output terminals (which can be called the first and second voltage output terminals of the X phase); it has two current input terminals and two current output terminals; among which, the first current input terminal and the first current output terminal of the X phase constitute a first current circuit; the second current input terminal and the second current output terminal of the X phase constitute a second current circuit.

[0082] For the three-phase circuit, a switch T is set accordingly. X (X=A, B, C), the switching switch is a travel switch.

[0083] The travel switch has a pair of normally open contacts and a pair of normally closed contacts.

[0084] Connect a pair of normally closed contacts of the travel switch between the voltage input terminal of the corresponding phase and the first and second voltage output terminals;

[0085] Connect a pair of normally open contacts of the travel switch between the first current wiring terminal and the second current wiring terminal of the corresponding phase respectively;

[0086] Thus, from the perspective of circuit connection, for each phase circuit, the pair of normally closed contacts P of the corresponding travel switch Xu Connect between the voltage input terminal of the corresponding phase and the first and second voltage output terminals; a pair of normally open contacts P corresponding to the travel switch Xi Connected across the first current line and the second current line of the corresponding item.

[0087] In terms of circuit function, taking phase A as an example, when switching switch T A At voltage terminal PAu When the limit switch button is not pressed (equivalent to the case where the pair of normally closed contacts of the switch is in a closed state and the pair of normally open contacts is in a disconnected state), the A-phase voltage circuit is connected (i.e., the first voltage input terminal of the A-phase is connected to the first and second output terminals), and the A-phase current circuit is connected (since the pair of normally open contacts is disconnected, the first current circuit and the second current circuit of the A-phase are connected independently); when T A Push to the current short circuit terminal P Ai When the A-phase voltage circuit is disconnected (because the pair of normally closed contacts of the switching switch are in the disconnected state), the meter loses power (the abbreviation of losing voltage); the secondary side circuit of the A-phase current transformer is short-circuited (the pair of normally open contacts of the switching switch are in the closed state, short-circuiting the first current circuit and the second current circuit of the A-phase), and the current will no longer flow to the meter.

[0088] like Figure 5 As shown in the figure, the rightmost set of wiring corresponds to the neutral line in the three-phase circuit, and its neutral line input terminal U Nin And the first and second neutral line output terminals U Nout1 and U Nout2 A surge voltage absorption circuit is connected in series.

[0089] The surge voltage absorption circuit is composed of resistors R1, R2, and diodes D1, D2, wherein the diodes D1, D2 and the resistor R2 are connected in series and then connected in parallel with the resistor R1;

[0090] Specifically, the positive electrode of the diode D1 and the first end of the resistor R1 are connected to the neutral line input terminal U Nin The cathode of the diode D1 is connected to the anode of the diode D2; the cathode of the diode D2 is connected to the first end of the resistor R2; the second end of the resistor R2 is connected in parallel with the second end of the resistor R1, and then connected to the first zero line output terminal U Nout1 And the second neutral line terminal U Nout2 Connect simultaneously.

[0091] In addition, the resistor R1 may also be a fuse or a varistor.

[0092] like Figure 6 As shown, based on Figure 5 The circuit topology diagram of the quick-cut mechanism further draws the PCB circuit board design diagram to realize the connection between the wiring port and the travel switch mechanism.

[0093] The 3D structure of the quick-cut electric energy metering joint junction box of the present invention is shown in FIG. Figure 7 as shown in .

[0094] In the figure, 1 is the quick-cut mechanism module, 1-1 is the button of the travel switch, 2 is the linkage slide bar, 2-1 is the recessed part, 3 is the block-type locking mechanism, 4 is the incoming wiring terminal, 5 is the outgoing wiring terminal, 6 is the junction box housing, and 7 is the PVC transparent protective cover.

[0095] As can be seen from the figure, a number of incoming wiring terminals 4 and outgoing wiring terminals 5 are respectively arranged on both sides of the rectangular junction box shell 6, and three quick-cut mechanism modules 1 are arranged between the incoming wiring terminals and the outgoing wiring terminals; the three quick-cut mechanism modules are respectively arranged corresponding to the corresponding incoming wiring terminals and outgoing wiring terminals of the three-phase electricity.

[0096] Furthermore, each of the quick-cut mechanism modules is respectively arranged between the incoming line terminal 4 and the outgoing line terminal 5 of the corresponding phase.

[0097] The quick-cut mechanism module includes a travel switch.

[0098] A linkage slide bar 2 is arranged above the three quick-cut mechanism modules for synchronously controlling the actions of the quick-cut mechanism modules.

[0099] The linkage slide bar is arranged on the slideway above the buttons of the three travel switches, and the actions of the quick-cut mechanism modules are synchronously controlled through the movable sliding of the linkage slide bar.

[0100] The synchronous control of the actions of each quick-cut mechanism module includes synchronously pressing or releasing the buttons 1 - 1 of each travel switch.

[0101] Specifically, when the slide bar is pushed to the meter-changing position, the buttons of the three-phase quick-cut mechanism are pressed down at the same time. Figure 5 Middle switch T A 、T B 、T C Move to terminal P Ai , P Bi , P Ci When the slide bar is pushed to the metering position, Figure 9b The middle button jumps up due to the action of a spring (not shown in the figure). Figure 5 Middle switch T A 、T B 、T C Move to terminal P Au , P Bu , P Cu so that the three phases are energized at the same time.

[0102] Further, the driving principle of the linkage slide rod to the button 1-1 of each travel switch is as follows: Figure 8a and Figure 8bAs shown in FIG. 1 , a concave portion 2-1 is provided on one side of the linkage slide rod. When the linkage slide rod slides toward the metering position ( Figure 8a When the linkage slide bar is in the original first position (sliding to the left in the middle, or in the original first position), the buttons of the three travel switches are just embedded in the recessed parts of the linkage slide bar, and then the buttons of the three travel switches are released synchronously, and the circuit connection relationship of the junction box of the transformer type electric energy metering device is in the metering state.

[0103] like Figure 8b As shown in the figure, when the linkage slide bar slides to the right (as shown by the rightward red arrow in the figure) to enter the meter-changing position, the buttons of each travel switch are pressed downward by the linkage slide bar (as shown by the downward red arrow in the figure), and then the buttons of the three travel switches are pressed synchronously, the voltage circuits of each phase are disconnected, and the meter loses power; the secondary side circuits of the current transformers of each phase are short-circuited, and the circuit connection relationship of the junction box of the transformer-type electric energy metering device is in the meter-changing state.

[0104] At the end of the slide rod, a block-type locking mechanism 3 is provided to prevent accidental movement or misoperation by personnel.

[0105] The block-type locking mechanism is a rotatable convex block structure sleeved on the shaft (its action principle is similar to that of an eccentric cam).

[0106] Specifically, Figure 9a and Figure 9b As shown in FIG. 1 , the card-block type locking mechanism 3 is rotatably arranged at one end (also called the end) of the linkage slide bar 2. When the card block of the card-block type locking mechanism is moved in one direction ( Figure 9a When the card block is pushed in the other direction ( Figure 9b When the card block is in the locked state, the meter changer cannot push the slide bar, thus avoiding misoperation or erroneous operation during meter change.

[0107] A transparent protective cover 7 is provided above the junction box housing 6 to prevent personnel from accidentally moving the upper panel (referred to as the panel) of the junction box during daily operation.

[0108] In addition, the live parts of each component of the junction box are encapsulated with insulating materials to prevent electric shock.

[0109] The junction box shell is made by 3D printing, and the actual junction box sample developed after assembly is as follows Fig.10 shown.

[0110] The specific operation method (or operation flow) of the quick-cut electric energy metering combined junction box of the present invention is as follows: Fig.11a and Fig.11b shown.

[0111] When it is necessary to enter the meter-changing state, push the slide bar to the meter-changing position and then push the card block upward to lock the slide bar, thereby switching the metering state to the meter-changing state.

[0112] When it is necessary to enter the metering state, push the card block down to unlock the slide bar, and then push the slide bar to the metering position, so as to restore the meter changing state to the metering state.

[0113] Specifically, when the quick-cut junction box needs to be switched from the metering state to the meter replacement state, Fig.11a Proceed as shown in the steps:

[0114] 1) Check the electrical status of the junction box casing;

[0115] 2) Open the package and remove the protective case;

[0116] 3) Push the slide bar to the table change position;

[0117] 4) Push the card block upward to lock the slide bar;

[0118] 5) Cover with protective case;

[0119] 6) The metering state is switched to the meter replacement state.

[0120] Fig.11a The steps framed by the red dotted line are operation steps unique to this technical solution.

[0121] Similarly, when the quick-cut junction box needs to be switched from the meter replacement state to the metering state, follow the Fig.11b Proceed as shown in the steps:

[0122] 1) Remove the protective case;

[0123] 2) Push the card block downward to unlock the slide bar;

[0124] 3) Push the slide bar to the metering position;

[0125] 4) Cover with protective shell and seal;

[0126] 5) The meter replacement status is restored to the measuring status.

[0127] Likewise, Fig.11b The steps framed by the red dotted line are operation steps unique to this technical solution.

[0128] In summary, the main innovative points of the technical solution of the present invention are summarized as follows:

[0129] 1. Innovation in operation process: It eliminates the manual repetitive assembly and disassembly actions in each link of the original process of switching the meter status, which improves the efficiency of meter replacement and reduces the error rate of manual assembly and disassembly.

[0130] 2. Innovation in physical structure: The travel switch type quick-cut mechanism realizes the rapid conversion of the electric energy meter between the meter replacement state and the metering state; the block-type locking mechanism effectively prevents accidental contact and misoperation by personnel; and the independent packaging of components reduces the probability of electric shock to personnel.

[0131] The present invention can be widely used in the fields of design, manufacture, operation and maintenance of high-voltage electric energy metering devices.

Claims

1. A fast-cut electric energy metering joint junction box, comprising an incoming terminal and an outgoing terminal located in a junction box housing, characterized in that: On both sides of the junction box housing, incoming wiring terminals and outgoing wiring terminals are respectively arranged; A quick-cut mechanism module is provided between the incoming wiring terminal and the outgoing wiring terminal; A linkage slide bar is arranged above the quick-cut mechanism module to synchronously control the movement of the quick-cut mechanism module; At the end of the slide bar, a block-type locking mechanism is provided to prevent accidental movement or misoperation by personnel; A transparent protective cover is arranged above the junction box housing.

2. The quick-cut electric energy metering joint junction box according to claim 1 is characterized in that There are multiple incoming terminals and multiple outgoing terminals.

3. The quick-cut electric energy metering combined junction box according to claim 2 is characterized in that The multiple incoming terminals are respectively connected to the output ends of the voltage transformer and the current transformer of each phase; the multiple outgoing terminals are correspondingly connected to the connection terminals of each phase of the electric energy meter and the collection terminal.

4. The quick-cut electric energy metering combined junction box according to claim 1 is characterized in that There are three quick-cut mechanism modules; The quick-cut mechanism module comprises a travel switch with a button.

5. The quick-cut electric energy metering combined junction box according to claim 4 is characterized in that The three quick-cut mechanism modules are respectively arranged corresponding to the positions of the corresponding incoming wiring terminals and outgoing wiring terminals of the three-phase electricity.

6. The quick-cut electric energy metering combined junction box according to claim 4 is characterized in that The linkage slide bar is arranged above the buttons of the three travel switches, and the actions of the quick-cut mechanism modules are synchronously controlled through the movable sliding of the linkage slide bar.

7. The quick-cut electric energy metering combined junction box according to claim 6 is characterized in that The synchronous control of the actions of the quick-cut mechanism modules includes synchronously pressing or releasing buttons of the travel switches.

8. The quick-cut electric energy metering joint junction box according to claim 1 is characterized in that The block-type locking mechanism is a rotatable convex block structure mounted on the shaft; When the block of the block-type locking mechanism is moved in one direction, the linkage slide bar can slide left and right at will, and it is in the unlocked state; When the block of the block-type locking mechanism is moved in another direction, the block is fixed between the structural member and the linkage slide bar, so that the linkage slide bar cannot slide freely along its sliding direction, and is in a locked state.

9. The quick-cut electric energy metering combined junction box according to claim 1 is characterized in that When you need to switch the quick-cut junction box from the metering state to the meter replacement state, follow the steps below: 1) Check the electrical status of the junction box casing; 2) Open the package and remove the protective case; 3) Push the slide bar to the table change position; 4) Push the card block upward to lock the slide bar; 5) Cover with protective case; 6) The metering state is switched to the meter replacement state. Similarly, when the quick-cut junction box needs to be switched from the meter replacement state to the metering state, follow the steps below: a) Remove the protective case; b) Push the card downward to unlock the slide bar; c) Push the slide bar to the metering position; d) Cover with protective shell and seal; e) The meter replacement status is restored to the measuring status.

10. The quick-cut electric energy metering combined junction box according to claim 1 is characterized in that The quick-cut electric energy metering combined junction box adopts a quick-cut mechanism to achieve rapid conversion between the meter replacement state and the metering state, avoiding manual repetitive assembly and disassembly actions in each link of the meter state switching process, thereby improving the efficiency of meter replacement work and reducing the error rate of manual assembly and disassembly; by setting a card block locking mechanism, it can effectively prevent people from accidentally touching or operating; by independently packaging the components, the probability of electric shock to people is reduced.

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