CN119543016A - A quick-cut electric energy metering joint junction box with calibration function - Google Patents
A quick-cut electric energy metering joint junction box with calibration function Download PDFInfo
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- CN119543016A CN119543016A CN202411502697.2A CN202411502697A CN119543016A CN 119543016 A CN119543016 A CN 119543016A CN 202411502697 A CN202411502697 A CN 202411502697A CN 119543016 A CN119543016 A CN 119543016A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/16—Distribution boxes; Connection or junction boxes structurally associated with support for line-connecting terminals within the box
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Abstract
一种有校验功能的速切式电能计量联合接线盒，属计量领域。在接线盒壳体内，设置进线接线端子和出线端子；进线接线端子设置在接线盒外壳内部一侧，出线接线端子设置在接线盒外壳内部另一侧；在进线接线端子和出线端子之间，设置一个校验执行机构；校验速切机构包括微动开关；在校验执行机构的上方，设置校验速切机构；校验速切机构由校验联动拨杆和校验拨块组成；校验联动拨杆为长方形结构件；拨块为套装在轴上的可转动凸块结构，其转动平面与校验联动拨杆设置在同一平面上；通过对校验速切机构的操作，可实现在外部接线不改变的前提下，快速地切换被测电能表的计量状态和校验状态，有效防止人员误碰、误操作。
A quick-cut electric energy metering joint junction box with a calibration function belongs to the field of metering. In the junction box shell, an incoming line terminal and an outgoing line terminal are arranged; the incoming line terminal is arranged on one side of the inner shell of the junction box, and the outgoing line terminal is arranged on the other side of the inner shell of the junction box; a calibration actuator is arranged between the incoming line terminal and the outgoing line terminal; the calibration quick-cut mechanism includes a micro switch; the calibration quick-cut mechanism is arranged above the calibration actuator; the calibration quick-cut mechanism consists of a calibration linkage lever and a calibration dial block; the calibration linkage lever is a rectangular structural member; the dial block is a rotatable convex block structure sleeved on the shaft, and its rotation plane is arranged on the same plane as the calibration linkage lever; by operating the calibration quick-cut mechanism, the metering state and calibration state of the measured electric energy meter can be quickly switched without changing the external wiring, effectively preventing personnel from accidentally touching or operating the meter.
Description
Technical Field
The invention belongs to the field of electric energy metering, and particularly relates to a combined junction box for electric energy metering.
Background
The electric energy metering device is a metering device for measuring and recording the generated energy, the power supply quantity, the station power consumption, the line loss power and the user power consumption.
The electric energy metering device refers to a whole body formed by an electric energy meter (also called an ammeter or an ammeter, for short, a meter), a metering transformer (comprising a voltage transformer and a current transformer) and a secondary connecting wire.
With the continuous advancement of optimizing the environment of electric operators, the use of transformer type electric energy metering devices is becoming more widespread. In order to ensure the operation safety of the verification personnel, an electric energy metering combined junction box is required to be installed in the secondary circuit to realize the connection between the transformer and equipment such as an electric energy meter, an acquisition terminal and the like.
The combined power metering junction box (also called a secondary junction box) is a component part in the power metering device and is used for connecting the power metering device with an external circuit.
In the secondary junction box, a plurality of upper and lower rows of wiring terminals (terminals for short) are usually arranged, each terminal represents a circuit contact, the upper row of terminals are usually used for being connected with each terminal of the electric energy meter, the lower row of terminals are used for being connected with an external circuit or device, a detachable connecting copper sheet (connecting sheet for short) is arranged between certain terminals of the upper and lower rows, and the electric connection relation between the upper and lower rows of terminals can be realized by fastening or unfastening the different connecting sheets by screws, so that different circuit functions are realized.
In order to realize the operation of the series standard meter in the electric meter calibration process, a screwdriver is required to stir a connecting copper sheet in the junction box to realize the switching between the metering state and the calibration state of the electric meter. In the process, the worker needs to repeatedly screw more than ten screws to fix and move the connecting sheet, so that the working efficiency is low and the operation speed is low.
The principle of wiring to switch the meter from the metering state to the calibration state is shown in fig. 1.
As can be seen from fig. 1, when the current transformer is switched from the metering state to the calibration state, the current metering units of the standard meter are connected in series in the current transformer loop of each phase, so that the electric energy meter and the standard meter can meter simultaneously, and the calibration of the electric energy meter of a user is realized.
In the conversion process, a worker needs to manually and repeatedly unscrew and screw 6 screws and stir 3 copper sheets. After the verification work is finished, the state switching is needed again, and the meter is restored to the metering state from the verification state.
In the process, a verifier needs to manually and repeatedly unscrew and screw 12 screws and stir 6 copper sheets. After the verification work is finished, the state switching is needed again, and the meter is restored to the metering state from the verification state. Because of the need of loosening and tightening of a plurality of screws and the movement of the connecting sheet, the verification efficiency of the verification personnel is low and the operation speed is low. Meanwhile, as the panel of the junction box is in an open state, the metal parts of each screw and each connecting sheet are in an electrified bare state, and a checking staff is easy to touch the electrified part by mistake to get an electric shock in the process of switching the meter state.
In order to ensure operation safety, the patent of the invention with the authorized notice date being 2022.01.18 and the authorized notice number being CN 112290491B discloses an anti-false-touch insulating device of an electric energy measurement combined junction box, which comprises a shielding main body, wherein the shielding main body is of a cuboid structure and is used for being matched with a measurement box and shielding a live binding post in the measurement box, the shielding main body is provided with a voltage protection component, the voltage protection component comprises a first separation baffle, a second separation baffle and a third separation baffle which are connected to two ends of the first separation baffle, the voltage protection component is U-shaped, the first separation baffle is matched between the voltage binding post and the voltage connection sheet, the second separation baffle and the third separation baffle are matched to two sides of the voltage binding post, and the shielding main body is also provided with a connecting part which is used for being connected with the measurement box. According to the technical scheme, the separation baffle is arranged between the voltage binding post and the voltage connecting piece, so that the voltage binding post and the voltage connecting piece are definitely disconnected, and the electric shock of a worker caused by the communication of the voltage connecting piece and the voltage binding post is avoided. But the device only reduces the occurrence probability of electric shock caused by error touch of a calibrator, and in the calibration process, the operating state of the meter still needs to be switched by sequentially screwing the screw adjusting dial plate, so that the operation efficiency cannot be improved, and meanwhile, the occurrence of misoperation accidents of the calibrator cannot be effectively avoided.
The invention discloses a high-efficiency electric quantity metering combined junction box, which comprises a box body and a box cover, wherein a plurality of wiring holes are formed in the box body, a rotary connecting unit is arranged in the wiring holes and comprises a telescopic component and a rotary component, the telescopic component comprises a first sleeve, a second sleeve and an elastic piece, the rotary component comprises a rotary core, a limiting piece and a clamping piece, the second sleeve axially slides in the first sleeve, and the rotary core is driven to rotate in the second sleeve by sliding of the second sleeve, and the first sleeve, the second sleeve and the rotary core are concentric. According to the technical scheme, the rotating core, the limiting piece, the clamping piece, the telescopic component and other elements are embedded in the junction box, the electric energy metering combined junction box with the rotating element is provided, the workload of personnel when switching the meter state can be effectively reduced, the operation efficiency is improved, but the phenomenon that the rotating unit is easy to be blocked and cannot rotate in the operation process, so that the meter state is switched to fail in the operation process is caused.
The invention patent application with the application publication number of CN 111650411A discloses a combined junction box and an electric energy metering device, which comprises a box body, and a current terminal, a voltage terminal, a current connecting piece, a voltage loop, a current loop and a test hole which are arranged on the box body, wherein the current terminal and the voltage terminal are used for being connected with an external cable, the test hole is respectively arranged on the voltage loop and the current loop and can be electrically connected with a test wire connector of an external test instrument and used for testing the voltage loop and the current loop on the box body, and a conductive elastic piece is obliquely arranged in the test hole and used for clamping the test wire connector inserted into the test hole. The conductive elastic sheet is obliquely arranged in the test hole and used for clamping the test wire connector, so that the mounting stability of the test wire connector is improved, and the safety of the test is improved. However, the improvement method does not effectively solve the problem that the running state of the meter needs to be manually switched.
In addition, the utility model patent with the authority notice date being 2014.09.24 and the authority notice number being CN 203850784U discloses an electric energy meter combined junction box with the non-dislocation of the on-off of a voltage connecting piece, the utility model patent with the authority notice date being 2014.09.24 and the authority notice number being CN 203850785U discloses an electric energy meter combined junction box guillotine switch type voltage connecting piece.
To sum up, it is needed to develop an electric energy metering combined junction box capable of rapidly and accurately realizing meter state switching, so as to replace the current manual switching mode, improve switching efficiency, prevent personnel from getting an electric shock and reduce accident occurrence probability.
Disclosure of Invention
The invention aims to solve the technical problem of providing a quick-cutting type electric energy metering combined junction box with a verification function. The circuit is based on the switching principle of a micro switch, a topological structure capable of switching metering and checking loops by one key simultaneously is designed, three-phase circuit switching is realized by installing a deflector rod on the basis, a checking deflector block locking mechanism is additionally arranged to prevent misoperation of personnel, and meanwhile, copper-exposed parts on a junction box are independently packaged to avoid electric shock of personnel.
The technical scheme of the invention is that the quick-cutting type electric energy metering combined junction box with the verification function comprises an incoming line terminal and an outgoing line terminal which are positioned in a junction box shell, and is characterized in that:
an incoming wire binding post and an outgoing wire terminal are respectively arranged at two sides in the junction box shell;
the wire inlet wiring terminal is arranged on one side of the inside of the junction box shell, and the wire outlet wiring terminal is arranged on the other side of the inside of the junction box shell;
a checking executing mechanism is arranged between the incoming wire connecting terminal and the outgoing wire terminal;
a checking quick cutting mechanism is arranged above the checking executing mechanism and used for synchronously controlling the action of the checking executing mechanism;
by operating the checking quick-cutting mechanism, the metering state and the checking state of the electric energy meter to be tested can be quickly switched on the premise that the external wiring is not changed;
The checking quick cutting mechanism consists of a checking linkage deflector rod and a checking deflector block;
the checking linkage deflector rod is a rectangular structural member and can horizontally move in the junction box shell to control the action of the checking quick-cutting mechanism;
The shifting block is a rotatable lug structure sleeved on the shaft, and the rotating plane of the shifting block and the checking linkage shifting rod are arranged on the same plane;
Above the junction box housing, a transparent protective cover is provided.
The quick-cutting checking mechanism comprises three micro switches, wherein a pressing sheet is arranged on the upper part of each micro switch, and the normally open contact and the normally closed contact in the micro switch can be changed by applying pressure to the pressing sheet or releasing the pressure.
Further, the three quick-cutting mechanism modules are respectively and correspondingly arranged with the positions of the corresponding incoming wire connecting terminals and outgoing wire connecting terminals of the three-phase power supply.
The three pressure heads synchronously control the actions of the checking quick-cutting mechanisms through the movement of the checking linkage deflector rod, so that the switching between the metering state and the checking state of the electric energy meter to be tested is realized on the premise of not changing external wiring.
Further, the synchronous control of the movements of the quick-cutting mechanism modules comprises that three pressure heads of the check linkage deflector rod drive the micro-switches in the three check quick-cutting mechanisms to move simultaneously, and the pressing sheets of the micro-switches are synchronously pressed down or released, so that the states of normally open contacts and normally closed contacts in the micro-switches are synchronously changed.
Specifically, when the shifting block is shifted towards one direction, the verification linkage shifting rod can slide up and down at will to be in an unlocking state.
When the shifting block is shifted towards the other direction, the shifting block is jacked up to clamp and fix the verification linkage shifting rod, so that the verification linkage shifting rod cannot slide up and down freely, and is in a locking state.
Specifically, when the pressing piece is not pressed down, the 1 end and the 2 end of the micro switch are in a connection state, the 1 end and the 3 end are in a disconnection state, at the moment, the output current of the current transformer flows through the current coil of the electric energy meter to be measured through the first incoming line terminal I in1 and the first outgoing line terminal I out1 and then returns to the corresponding output connecting terminal of the current transformer through the second outgoing line terminal I out2, the 2 end and the 1 end of the micro switch I and the second incoming line terminal I in2, and in the state, the output of the current transformer is sent to the electric energy meter to be measured so as to count the corresponding electric energy parameters.
9. The quick-cutting type electric energy metering combined junction box with the verification function according to claim 2 is characterized in that when a pressing sheet is pressed down, a position between a1 end and a2 end of a microswitch is in an off state, a position between a1 end and a 3 end of the microswitch is in an on state, at the moment, the output current of a current transformer is sent to a measured electric energy meter and a standard electric energy meter connected in series through a first inlet terminal I in1 and a first outlet terminal I out1, after the current passes through a current coil of the measured electric energy meter, the current passes through a second outlet terminal I out and a first test connection terminal IT1 connected with the second outlet terminal, after the current passes through the current coil of the standard electric energy meter, the current passes through a second test connection terminal IT2, a2 end and a 3 end of the microswitch and a second inlet terminal I in2, the output current transformer is sent to the measured electric energy meter and the standard electric energy meter connected in series, and the measured electric energy meter and the standard electric energy meter are simultaneously metered, so that the electric energy error between the measured electric energy meter and the measured electric energy meter can be known through calculation and comparison, and the measured electric energy error is measured, and the verification function is realized.
The quick-cutting type electric energy metering combined junction box disclosed by the invention realizes quick conversion of a measured electric energy meter between a metering state and a checking state by arranging the micro-switch type quick-cutting mechanism, effectively prevents personnel from being touched by mistake and misoperation by arranging the shifting block type locking mechanism, and reduces the personnel electric shock probability by adopting an independent packaging mode for parts.
Compared with the prior art, the invention has the advantages that:
1. when the metering state is needed to be entered, the shifting block is lowered, the shifting rod is pushed to the metering position after the shifting rod is unlocked, so that the calibration state can be restored to the metering state, and the whole switching operation process is simple and convenient;
2. According to the technical scheme, the quick switching mechanism is adopted to realize quick switching between the checking state and the metering state, so that manual repeated assembly and disassembly actions of each link in the process of switching the meter state are avoided;
3. According to the technical scheme, the dial block type locking mechanism is arranged, and parts are independently packaged, so that personnel can be effectively prevented from being touched by mistake and misoperation, and the personnel electric shock probability is reduced.
Drawings
FIG. 1 is a schematic diagram of a switching principle of a check state of a high-voltage meter;
FIGS. 2a and 2b are schematic diagrams of the switching principle of the actuator according to the present invention;
FIGS. 3a and 3b are schematic views of a drive mode of a check linkage lever of the present invention;
FIG. 4 is a schematic diagram of the circuit topology of the junction box of the present invention;
FIGS. 5a and 5b are schematic diagrams of switching of the metering and calibration circuits of the present invention;
FIG. 6 is a schematic perspective view of a junction box of the present invention;
FIG. 7 is a schematic diagram of the wiring of the junction box of the present invention;
Fig. 8 is a schematic diagram of the verification operation of the junction box of the present invention.
In the figure, l is a junction box shell, 2 is a transparent protective cover, 3 is a meter changing linkage slide bar, 4 is a slide bar locking block, 5 is a meter changing actuating mechanism, 6 is a checking linkage deflector rod, 6-1 is a pressure head, 7 is a checking deflector block, 8 is a checking actuating mechanism, 9 is a zero line fuse box, 10 is an incoming line connecting terminal, and 11 is an outgoing line connecting terminal.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention adopts a switching product structure which can be switched on a circuit and has no exposed electric contact on a mechanical structure, is used for replacing a connecting sheet in the traditional junction box and changing the fixing mode of the connecting sheet by adjusting a screw, changes the mode of changing the connection relation between the wire inlet and outlet connecting terminals by changing the position of the connecting sheet, and finally realizes the purposes of conveniently changing the connection mode between the wire inlet and outlet connecting terminals, preventing contact shock and improving the working efficiency.
1. The switching principle of an actuating mechanism:
The verification state executing part (also called a verification executing mechanism) is a G610 type micro switch (micro switch for short), and the switching principle of the verification state executing part is shown in fig. 2a and 2b.
In fig. 2a, in the metering state, the presser YP is not pressed, the contact CD is in a raised state under the action of the spring, the COM end ① and NC end ② of the microswitch are in an "on" state, and the COM end ① and NO end ③ are in an "off" state.
In fig. 2b, when the switch is switched to the verification state, the pressing piece YP of the micro switch is pressed down, the contact CD is pressed down, and the micro switch is switched from the original state of ①-② end conduction, ①-③ end disconnection (metering state) to ①-② end disconnection, ①-③ end conduction, so as to complete the verification state switching.
Therefore, the checking state executing component (micro switch) is arranged between the wire inlet and outlet terminals in the junction box shell to switch, so that the metering state and the checking state of the electric energy meter to be tested can be quickly switched on the premise that the external wiring is not changed.
Because the detection object of the meter is three-phase four-wire system, three sets of the actuating mechanisms are required to be arranged for simultaneous switching, and the synchronous switching function can be realized.
In order to enable the three sets of actuating mechanisms to be simultaneously and synchronously switched, the following quick-cutting mechanism is designed.
2. The design of the quick cutting mechanism is as follows:
The checking quick-cutting mechanism consists of a checking linkage deflector rod 6 (called checking linkage deflector rod or deflector rod for short) and a checking deflector block 7 (called deflector block for short).
Referring to fig. 3a and fig. 7, three pressure heads 6-1 (1 pressure head is taken as an example in fig. 3a and labeled as a pressure head of the pressure rod) are arranged on the pressure rod 6, and the pressure rod is pushed to drive three micro switches to act simultaneously, so that synchronous conversion of three-phase current loops is realized.
The shifting block 7 is a rotatable lug structure sleeved on the shaft (the action principle of the rotatable lug structure is similar to that of an eccentric cam).
The checking linkage deflector rod can be pushed to move to the checking position by rotating the deflector block clockwise, and the checking linkage deflector rod can be locked.
When the shifting block is shifted to the other direction, the shifting block is just jacked up to clamp and fix the verification linkage shifting rod, so that the verification linkage shifting rod cannot freely slide up and down to be in a locking state.
When the shifting block is in a locking state, an operator cannot push the checking linkage shifting lever, so that misoperation or misoperation of the operator in the operation process is avoided.
Specifically, in fig. 3b, when the calibration linkage deflector rod is pushed up to the calibration position, the three pressure heads of the three-phase calibration quick-cutting mechanism press down the contacts through the pressing sheets, so that the incoming line (① pin) of the calibration switch K A、KB、KC in fig. 4 is disconnected from the J Ai、JBi、JCi(② pin) and communicated with the Y A、YB、YC(③ pin, and the current of each phase is connected in series with the standard meter after passing through the user meter (i.e. the electric energy meter to be measured).
3. And (3) circuit design:
the circuit topology design of the quick-cutting electric energy junction box with the verification function is shown in fig. 4.
In FIG. 4, taking phase A as an example, in a metering state (a deflector rod is arranged below, and a micro switch contact point is sprung) the incoming line of the micro switch K A is communicated with J Ai, and phase A is in current communication;
The checking state (the deflector rod is pushed on, and the contact of the micro switch is pressed down) is that the incoming line of the micro switch K A is disconnected with the J Ai and communicated with the Y A, and the phase A current is connected with the standard meter in series through the IT Ai1 after passing through the user meter and then connected to the current transformer through the IT Ai2.
In fig. 5a and 5b, a schematic illustration of the switching process of the metering and verification circuit is given.
In this technical solution, the metering state and the verification state are both specific to the electric energy meter to be tested (see fig. 5a and 5 b. In the drawings, the "user table" is used for representation).
When the electric energy meter to be measured is in a metering state, the pressing piece YP is not pressed, the 1 end (or pin, referred to as COM end) and the 2 end (NC end) of the micro switch KTI are in an on state (①-② end is conducted), and the 1 end (COM end) and the 3 end (NO end) are in an off state (①-③ end is disconnected), so that the output current of the current transformer returns to the corresponding output connection terminal of the current transformer through the first wire inlet terminal I in1, the first wire outlet terminal I out1, the second wire outlet terminal I out2, the 2 end and the 1 end (also referred to as contacts) of the micro switch KTI, and the second wire inlet terminal I in2.
In other words, in this state, the output of the current transformer is sent to the measured electric energy meter for measurement to count the corresponding electric energy parameter, so it is called "measurement state".
When the electric energy meter to be tested needs to be converted into a verification state, a pressing sheet YP of the micro switch is pressed down by a pressing head of a deflector rod, a contact CD is pressed down, and the micro switch is converted into a state that a ①-② end is conducted and a ①-③ end is disconnected, a ①-② end is disconnected and a ①-③ end is conducted, so that the switching of the verification state is completed. The output current of the current transformer passes through the first incoming line terminal I in1 and the first outgoing line terminal I out1, flows through the current coil of the tested electric energy meter, passes through the second outgoing line terminal I out2 and the first test wiring terminal IT1 connected with the second outgoing line terminal, flows through the current coil of the standard electric energy meter, and returns to the corresponding output wiring terminal of the current transformer through the second test wiring terminal IT2, the '2' contact, the '3' contact and the second incoming line terminal Iin2 of the microswitch KTI.
In this state, the output of the current transformer is sent to the measured electric energy meter and the standard electric energy meter connected in series with the measured electric energy meter, and the measured electric energy meter and the standard electric energy meter are measured at the same time, so that the electric energy parameters of the measured electric energy meter and the standard electric energy meter are recorded in the same time period, and the measurement accuracy error between the measured electric energy meter and the standard electric energy meter can be known through calculation and comparison, and the function of checking the measured electric energy meter can be realized, so that the measured electric energy meter is called as a checking state.
The overall construction design of the junction box is drawn by CAD, and the 3D stereoscopic design structure of the junction box is shown in fig. 6.
In fig. 6, the electrical topology and switching principle of the checking quick-cut mechanism executing module 8 are shown in fig. 3a, 3b and 4.
The three pressure heads 6-1 are arranged on the checking linkage deflector rod 6 and are used for synchronously driving the actions of the three checking switching microswitches, so that the function of synchronously checking switching is realized.
The assembled sample of the junction box of the various mechanism components is shown in fig. 7 with the wiring.
4. The checking operation method comprises the following steps:
As shown in fig. 8, during calibration, the standard meter is connected to the standard meter interface, the dial block 7 is rotated clockwise to push the calibration linkage dial rod 6 (abbreviated as dial rod) upwards to the calibration position, the pressing head 6-1 presses the pressing sheet YP (see fig. 2a to 3b and the action processes shown in fig. 7 and 8) in the calibration executing mechanism 8, and the contact of the micro switch is pressed, at this time, the dial block 7 is rotated clockwise to press against the dial rod to prevent the dial rod from moving up and down freely, so that the function of locking the dial rod is realized, and the metering state is switched to the calibration state.
When the metering state is required to be returned, the shifting block 7 is rotated anticlockwise, the shifting rod 6 is unlocked, then the shifting rod 6 is pushed downwards, the pressure exerted on the pressing sheet YP in the checking executing mechanism 8 is relieved by the pressure head 6-1, and the contact of the micro switch is reset and is restored to the metering state.
Referring to fig. 6, above the junction box housing 1, a transparent protective cover 2 is provided to prevent a person from operating an upper panel (abbreviated as a panel) of the junction box by mistake in a daily operation state.
In addition, all live parts of each part of the junction box are packaged by using insulating materials, so that personnel are prevented from getting electric shock.
In summary, the quick-cutting type electric energy metering combined junction box comprises a junction box shell, wherein a plurality of incoming wire connecting terminals and outgoing wire connecting terminals are respectively arranged on two sides of the inside of the junction box shell;
A checking executing mechanism is arranged between the incoming wire connecting terminal and the outgoing wire connecting terminal;
The checking executing mechanism is a micro switch.
The number of the micro switches is 3, a pressing sheet is arranged on the upper part of each micro switch, and the on-off modes of the normally open contact and the normally closed contact in the micro switch can be changed by applying pressure to the pressing sheet or releasing the pressure.
The upper part of the checking executing mechanism is provided with a checking quick-cutting mechanism, and the metering state and the checking state of the electric energy meter to be tested can be quickly switched on the premise that the external wiring is not changed by operating the checking quick-cutting mechanism.
The checking quick-cutting mechanism consists of a checking linkage deflector rod and a checking deflector block.
The shifting block is a rotatable lug structure sleeved on the shaft, and the rotatable lug structure and the checking linkage shifting rod are arranged on the same plane.
The checking linkage deflector rod can be pushed to move to the checking position by rotating the deflector block clockwise, and the checking linkage deflector rod can be locked.
When the shifting block is shifted towards the other direction, the shifting block jacks up to clamp and fix the verification linkage shifting rod, so that the verification linkage shifting rod cannot freely slide up and down and is in a locking state.
Three pressure heads are arranged on the deflector rod, and the deflector rod is stirred to drive three micro switches to act simultaneously, so that synchronous switching of three-phase current loops is realized.
Specifically, when the quick-cutting junction box is required to be switched from the metering state to the verification state, the method comprises the following steps:
1) Detecting electricity by the junction box shell;
2) Unsealing and removing the transparent protective cover;
3) Pushing up the deflector rod to a checking position;
4) Rotating the shifting block upwards to lock the shifting rod;
5) Covering a transparent protective cover;
6) The metering state is switched to the checking state.
Likewise, when the quick-cut junction box needs to be switched from the checking state to the metering state, the following steps are performed:
1) Removing the transparent protective cover;
2) The shifting block is rotated downwards to unlock the shifting rod;
3) The deflector rod is pushed down to a metering position;
4) Covering a transparent protective cover and sealing;
5) And the checking state is restored to the metering state.
In summary, the main innovative points of the technical scheme of the invention are summarized as follows:
1. the operation flow innovation is that manual and repeated assembly and disassembly actions of each link in the original meter state switching process are eliminated, and the manual tool disassembly error rate is reduced while the verification efficiency is improved.
2. The real structure is innovative in that the quick conversion between the metering state and the checking state of the electric energy meter to be tested is realized by arranging the micro-switch type quick-cutting mechanism, the misoperation of personnel is effectively prevented by arranging the shifting block type locking mechanism, and the electric shock probability of the personnel is reduced by adopting an independent packaging mode for parts.
The invention can be widely used in the fields of design, manufacture, operation and maintenance of high-voltage electric energy metering devices.
Claims (10)
1. The utility model provides a quick-cut electric energy measurement joint terminal box that has check-up function, includes inlet wire terminal and the outlet wire terminal that is located terminal box casing, characterized by:
an incoming wire binding post and an outgoing wire terminal are respectively arranged at two sides in the junction box shell;
the wire inlet wiring terminal is arranged on one side of the inside of the junction box shell, and the wire outlet wiring terminal is arranged on the other side of the inside of the junction box shell;
A checking executing mechanism is arranged between the incoming wire connecting terminal and the outgoing wire terminal, and the checking quick-cutting mechanism comprises a micro switch;
a checking quick cutting mechanism is arranged above the checking executing mechanism and used for synchronously controlling the action of the checking executing mechanism;
by operating the checking quick-cutting mechanism, the metering state and the checking state of the electric energy meter to be tested can be quickly switched on the premise that the external wiring is not changed;
The checking quick cutting mechanism consists of a checking linkage deflector rod and a checking deflector block;
the checking linkage deflector rod is a rectangular structural member and can horizontally move in the junction box shell to control the action of the checking quick-cutting mechanism;
The shifting block is a rotatable lug structure sleeved on the shaft, and the rotating plane of the shifting block and the checking linkage shifting rod are arranged on the same plane;
Above the junction box housing, a transparent protective cover is provided.
2. The quick-cutting type electric energy metering combined junction box with the verification function according to claim 1 is characterized in that the number of the verification quick-cutting mechanisms is three;
The upper part of each micro switch is provided with a pressing sheet, and the on-off modes of the normally open contact and the normally closed contact in the micro switch can be changed by applying pressure to the pressing sheet or releasing the pressure.
3. The quick-cutting type electric energy metering combined junction box with the verification function according to claim 2, wherein the three quick-cutting mechanism modules are respectively arranged corresponding to positions of corresponding incoming wire wiring terminals and outgoing wire wiring terminals of the three-phase power supply.
4. The quick-cutting type electric energy metering combined junction box with the verification function according to the claim 1 is characterized in that the verification linkage deflector rod is arranged above three verification quick-cutting mechanisms, three pressure heads are arranged on the deflector rod, and the three pressure heads synchronously control the actions of the verification quick-cutting mechanisms through the movement of the verification linkage deflector rod, so that the quick-cutting type electric energy metering junction box can be quickly switched between the metering state and the verification state of a tested electric energy meter on the premise of not changing external wiring.
5. The quick-cutting type electric energy metering combined junction box with the verification function according to claim 4, wherein the synchronous control of the actions of the quick-cutting mechanism modules comprises the steps that three pressure heads of a verification linkage deflector rod drive microswitches in three verification quick-cutting mechanisms to act simultaneously, the pressing sheets of the microswitches are synchronously pressed down or released, and the states of normally open contacts and normally closed contacts in the microswitches are synchronously changed.
6. The quick-cutting type electric energy metering combined junction box with the verification function according to claim 1, wherein when the shifting block is shifted towards one direction, the verification linkage shifting rod can slide up and down at will to be in an unlocking state.
7. The quick-cutting type electric energy metering combined junction box with the verification function according to claim 1, wherein when the poking block is poked towards the other direction, the poking block jacks up and clamps the verification linkage poking rod, so that the verification linkage poking rod cannot slide up and down freely, and is in a locking state.
8. The quick-cutting type electric energy metering combined junction box with the verification function according to claim 2 is characterized in that when the pressing piece is not pressed, a connection state is formed between a1 end and a2 end of the micro switch, a disconnection state is formed between a1 end and a3 end of the micro switch, output current of the current transformer flows through a current coil of a measured electric energy meter through a first incoming line terminal I in1 and a first outgoing line terminal I out1 and returns to a corresponding output junction terminal of the current transformer through a second outgoing line terminal I out2, the 2 end, the 1 end and the second incoming line terminal I in2 of the micro switch I, and in the connection state, output of the current transformer is sent to the measured electric energy meter to be metered so as to count corresponding electric energy parameters.
9. The quick-cutting type electric energy metering combined junction box with the verification function according to claim 2 is characterized in that when a pressing sheet is pressed down, a position between a1 end and a2 end of a microswitch is in an off state, a position between a1 end and a3 end of the microswitch is in an on state, at the moment, the output current of a current transformer is sent to a measured electric energy meter and a standard electric energy meter connected in series through a first inlet terminal I in1 and a first outlet terminal I out1, after the current passes through a current coil of the measured electric energy meter, the current passes through a second outlet terminal I out and a first test connection terminal IT1 connected with the second outlet terminal, after the current passes through the current coil of the standard electric energy meter, the current passes through a second test connection terminal IT2, a2 end and a3 end of the microswitch and a second inlet terminal I in2, the output current transformer is sent to the measured electric energy meter and the standard electric energy meter connected in series, and the measured electric energy meter and the standard electric energy meter are simultaneously metered, so that the electric energy parameters of the measured electric energy meter and the standard electric energy meter can be calculated and compared, and the measured electric energy error between the measured electric energy meter and the measured electric energy meter can be known, and the measured electric energy meter can be verified, and the measured electric energy error can be verified.
10. The quick-cutting type electric energy metering combined junction box with the verification function is characterized in that quick-cutting type electric energy metering combined junction box is provided with a micro-switch quick-cutting mechanism to realize quick conversion of a measured electric energy meter between a metering state and a verification state, a shifting block type locking mechanism is provided to effectively prevent personnel from being touched by mistake and misoperation, and an independent packaging mode is adopted for parts to reduce personnel electric shock probability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411502697.2A CN119543016A (en) | 2024-10-25 | 2024-10-25 | A quick-cut electric energy metering joint junction box with calibration function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411502697.2A CN119543016A (en) | 2024-10-25 | 2024-10-25 | A quick-cut electric energy metering joint junction box with calibration function |
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| Publication Number | Publication Date |
|---|---|
| CN119543016A true CN119543016A (en) | 2025-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411502697.2A Pending CN119543016A (en) | 2024-10-25 | 2024-10-25 | A quick-cut electric energy metering joint junction box with calibration function |
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| CN103399184A (en) * | 2013-08-05 | 2013-11-20 | 国家电网公司 | Joint junction box convenient for adjusting phase sequence |
| CN203551622U (en) * | 2013-10-31 | 2014-04-16 | 国网山东省电力公司泰安供电公司 | Switching electric energy metering junction box |
| WO2016177289A1 (en) * | 2015-05-06 | 2016-11-10 | 广东电网有限责任公司江门供电局 | Multipath electric power metering junction box |
| CN207557457U (en) * | 2017-12-01 | 2018-06-29 | 国网浙江省电力公司泰顺县供电公司 | The one transparent electric energy metering combined wiring box of bar coordinated type |
| CN209784420U (en) * | 2019-04-15 | 2019-12-13 | 刘驹 | electric energy meter termination |
| WO2023066380A1 (en) * | 2021-10-22 | 2023-04-27 | 浙江万胜智能科技股份有限公司 | Automatic-measurement electricity meter based on internet of things |
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2024
- 2024-10-25 CN CN202411502697.2A patent/CN119543016A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399184A (en) * | 2013-08-05 | 2013-11-20 | 国家电网公司 | Joint junction box convenient for adjusting phase sequence |
| CN203551622U (en) * | 2013-10-31 | 2014-04-16 | 国网山东省电力公司泰安供电公司 | Switching electric energy metering junction box |
| WO2016177289A1 (en) * | 2015-05-06 | 2016-11-10 | 广东电网有限责任公司江门供电局 | Multipath electric power metering junction box |
| CN207557457U (en) * | 2017-12-01 | 2018-06-29 | 国网浙江省电力公司泰顺县供电公司 | The one transparent electric energy metering combined wiring box of bar coordinated type |
| CN209784420U (en) * | 2019-04-15 | 2019-12-13 | 刘驹 | electric energy meter termination |
| WO2023066380A1 (en) * | 2021-10-22 | 2023-04-27 | 浙江万胜智能科技股份有限公司 | Automatic-measurement electricity meter based on internet of things |
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