CN109085400B - Current detection switch structure for multifunctional combined junction box for electric energy metering - Google Patents
Current detection switch structure for multifunctional combined junction box for electric energy metering Download PDFInfo
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- CN109085400B CN109085400B CN201811003902.5A CN201811003902A CN109085400B CN 109085400 B CN109085400 B CN 109085400B CN 201811003902 A CN201811003902 A CN 201811003902A CN 109085400 B CN109085400 B CN 109085400B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/04—Housings; Supporting racks; Arrangements of terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/146—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop
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- Switch Cases, Indication, And Locking (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention provides a current detection switch structure for a multifunctional combined junction box for electric energy metering, which comprises: the detection switch is arranged between two adjacent current terminal terminals so as to disconnect or close the two adjacent current terminal terminals; the lower part of one side surface of the detection switch is provided with two connecting grooves in parallel, and the two connecting grooves are connected with the current wiring terminal; the upper side surface of the detection switch is provided with a switch button to control the connection or disconnection between the two connection grooves. The pressing type voltage detection switch is arranged on the current wiring terminal, so that the use of bolts is reduced, the problem that the bolts are failed due to repeated loosening or screwing of the bolts when voltage detection is carried out is avoided, the repeated operation of the bolts is avoided by pressing the current detection switch, and the service life of the current detection switch is greatly prolonged.
Description
Technical Field
The invention relates to the technical field of combined junction boxes, in particular to a current detection switch structure for a multifunctional combined junction box for electric energy metering.
Background
At present, a combined junction box for electric energy metering is an important component of a metering secondary circuit, and has the functions of connecting secondary wires led out by a mutual inductor to terminals of an electric energy meter after the secondary wires are connected in series and in parallel through terminals at the end of the combined junction box, changing the on-off state of a testing circuit by changing the position of a poking piece on the junction box, and providing necessary conditions for on-site calibration with load, electricity utilization inspection and replacement of the electric energy meter of a metering device.
However, the existing combined junction box for electric energy metering has the following problems in the use process: in a general working state, the voltage plectrum in the junction box is in a conducting state, and the current plectrum is in an up-on-down-off state. In order to realize the operation of replacing the electric energy meter with load on site by a user, the voltage plectrum needs to be disconnected and the current plectrum needs to be in short circuit, and the voltage plectrum and the current plectrum are restored to the original states after the work of replacing the meter is finished. However, due to the non-standard operation, the voltage and current plectrum may not be recovered reliably, resulting in the missed and wrong recording of the electric quantity. Secondly, because the plectrum is through the copper bar lug connection in screw and the terminal box, so plectrum itself is electrified, when the staff operates the plectrum, just live working has brought the hidden danger for safety in production. Finally, the electric energy meter is detected, when a voltage and current test line is connected into the junction box, three-phase multi-group screws in the junction box need to be operated respectively, the operation is time-consuming and labor-consuming on one hand, on the other hand, the screw end parts are abraded due to the fact that disassembly and assembly of the meter inspection and the meter replacement are carried out at each time, and finally the screws are failed, and in addition, when the screws are loosened, the screws are also accompanied by the risk that the screws are separated from the junction box due to the nonstandard operation.
Therefore, there is a high necessity for a junction box to solve the above problems.
Disclosure of Invention
In view of this, the invention provides a current detection switch structure for a multifunctional combined junction box for electric energy metering, and aims to solve the problem of prolonging the service life of a current detection switch.
In one aspect, the present invention provides a current detection switch structure for a multifunctional combined junction box for electric energy metering, including: the detection switch is arranged between two adjacent current terminal terminals, so that the two adjacent current terminal terminals are opened or closed; the lower part of one side surface of the detection switch is provided with two connecting grooves in parallel, and the two connecting grooves are connected with the current wiring terminal; the upper side surface of the detection switch is provided with a switch button, and the connection between the two connection grooves is controlled to be disconnected or closed in a pressing mode.
Furthermore, the current detection switch structure also comprises a base cover, wherein the base cover is an open box body, and the open side of the base cover is connected and closed with the base; the detection switch is embedded on the inner bottom surface of the base cover.
Furthermore, a groove is formed in the inner bottom surface of the base cover, and the groove is arranged opposite to the detection switch, so that the detection switch is embedded in the groove.
Furthermore, the bottom surface of the groove is provided with a unthreaded hole, the unthreaded hole is opposite to the switch button, and the switch button is arranged in the unthreaded hole in a penetrating manner.
Further, the detection switch is of a square structure.
Further, the groove is of a square structure arranged opposite to the detection switch.
Further, the switch button is of a cylindrical structure.
Further, the light hole is a circular light hole arranged opposite to the switch button.
Further, the connecting groove is an arc-shaped groove.
Furthermore, a connecting hole is formed in the current terminal, and the connecting groove is connected with the connecting hole through a bolt or a screw.
Compared with the prior art, the invention has the beneficial effects that: the pressing type voltage detection switch is arranged on the current wiring terminal, so that the use of bolts is reduced, the problem that the terminal box cannot normally work due to the fact that the bolts are loosened repeatedly or screwed down when voltage detection is carried out is avoided, the repeated operation of the bolts is avoided by arranging the pressing type current detection switch, and the service life of the current detection switch and the service life of the terminal box are greatly prolonged; meanwhile, the pressing current detection switch is in an isolated state with the circuit, so that the condition of live working of testers is avoided, and the safety is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a structural diagram of a junction box according to an embodiment of the present invention;
FIG. 2 is a top view of a terminal block base provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of a junction box base and base cover connection provided by an embodiment of the present invention;
FIG. 4 is a perspective view of a detection tool provided in an embodiment of the present invention;
FIG. 5 is a perspective view of a table changing tool provided in an embodiment of the present invention;
FIG. 6 is a perspective view of a detection switch provided in an embodiment of the present invention;
fig. 7 is a perspective view of a voltage switch according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 3, an embodiment of the present invention provides a junction box for electric energy metering, including: the calibration device comprises a box cover 16, a base 14, a base cover 15 and a plug-in tool, wherein a current wiring terminal 17 and a voltage wiring terminal 18 are arranged on the base 14, a press-type detection switch 19 and a plug-in meter-changing switch 21 are arranged on the current wiring terminal 17, and a current connecting contact 22 used for being connected with a current calibration instrument is also arranged on the current wiring terminal 17; the voltage terminal 18 is provided with a press-type voltage switch 20, and the voltage terminal 18 is also provided with a voltage connecting contact 23 for connecting with a current calibration instrument.
Specifically, the base cover 15 is an open box, the base cover 15 has the same cross section as the base 14, the open side of the base cover 15 is connected to the base 14 and closed, and a cavity is formed inside the open side for placing a corresponding component.
Specifically, a detection switch passing hole 24 is provided on the bottom surface of the base cover 15, and the detection switch passing hole 24 is provided opposite to the button of the detection switch 19 so as to allow the button of the detection switch 19 to pass therethrough; the bottom surface of the base cover 15 is also provided with a meter changing switch through hole 25, the meter changing switch through hole 25 is arranged opposite to the pin hole of the meter changing switch 21, so that a pin 49 of the meter changing switch 21 passes through; the bottom surface of the base cover 15 is also provided with a current connection contact through hole 26, and the current connection contact through hole 26 is arranged opposite to the current connection contact 22 so as to enable the current connection end of the calibration instrument to pass through; a voltage switch passing hole 27 is further provided on the bottom surface of the base cover 15, the voltage switch passing hole 27 being disposed opposite to the button of the voltage switch 20 so as to pass the button of the voltage switch 20; the bottom surface of the base cover 15 is also provided with a voltage connection contact through hole 28, and the voltage connection contact through hole 28 is disposed opposite to the voltage connection contact 23 so as to pass a voltage connection terminal of the calibration instrument.
Specifically, the box cover 16 is an open box body and covers the upper side of the base cover 15, and the box cover 16, the base 14 and the base cover 15 are arranged in sequence and connected to form a closed box body; the opposite two sides of the bottom surface of the box cover 16 are provided with first connecting holes, the opposite two sides of the bottom surface of the base cover 15 are provided with second connecting holes, the first connecting holes and the second connecting holes are oppositely arranged, and the box cover 16 and the base cover 15 are connected into a whole through bolts or screws.
Specifically, the plug-in type tool is inserted on the upper side of the bottom surface of the base cover 15, and the plug-in type tool comprises a test tool 29 and a meter changing tool 30; the test tool 29 is provided with a test button 31, a current test hole 32 and a voltage test hole 33, the test button 31 is arranged opposite to the test switch through hole 24 and is contacted with the button of the test switch 19, the current test hole 32 is arranged opposite to the current connection contact through hole 26, and the voltage test hole 33 is arranged opposite to the voltage connection contact through hole 28; the meter replacing tool 30 is provided with a pin light hole 34 and a voltage button 35, the pin light hole 34 is arranged opposite to the meter replacing switch through hole 25, and the voltage button 35 is arranged opposite to the voltage switch through hole 27 and is contacted with the button of the voltage switch 20. The pin 49 is disposed within the pin aperture 34.
It can be understood that the current and voltage loop can be switched when the detection switch and the voltage switch are used for detecting meters, and the current calibrator is seamlessly connected into the test loop; the meter changing switch is used for changing the electric energy meter and can carry out short-circuit operation on the circuit. The circuit is switched by adopting the combined switch mode, so that the standard operation is facilitated, and the working efficiency is improved; meanwhile, the detection switch, the voltage switch and the meter changing switch are multi-contact path switches, so that the mode of crimping a wire can be effectively optimized, the electrified contact area is increased, the applicable frequency of a screw is reduced, and the internal circuit of the junction box can be effectively prevented from being switched due to the damage of the screw end; and the switch is completely isolated from the circuit, so that an operator does not need to carry out live working, the operation of the switch is simple and easy, the condition that the operator does not carry out live working is avoided, and the safety is improved. Through setting up the detection frock, trade table frock to will detect the frock through the mode of pegging graft, trade the table frock and connect in the base cover, the test wire will detect the frock through the mode of plug, trade table frock and terminal box and be connected properly, will the frock nature card in proper order go into the terminal box, and the switch on the control frock realizes set function, and operation process safety, reliable, the effectual work efficiency that has improved.
Specifically, the current connection terminal 17 includes three current terminal terminals 36 arranged side by side, and the detection switch 19 is arranged between two adjacent current terminal terminals 36 so as to open or close one of the two adjacent current terminal terminals 36, and a current connection contact 22 is arranged on each of the two adjacent current terminal terminals 36. The commutation switch 21 is provided between the other two adjacent current terminal terminals 36 to open or close the other two adjacent current terminal terminals 36.
Specifically, the voltage connection terminal 18 includes a voltage terminal 37, and the voltage switch 20 is disposed on the voltage terminal 37 to connect or disconnect the incoming line end and the outgoing line end of the voltage terminal 37. The voltage connection contact 23 is arranged on the voltage terminal 37.
The plug-in type junction box is mainly divided into a junction box body and a plug-in tool, and the plug-in tool is used as a matched device of a current calibration instrument and is connected to the junction box when field detection is carried out. According to different detection tasks, the test tool and the table changing tool correspond to each other.
Specifically, the junction box can be a three-phase four-wire combined junction box, the junction box preferably refers to a commonly-used FJ6/DFY1 type three-phase four-wire voltage and current combined junction box, and the size of a shell of the junction box can be completely replaced with that of an original junction box except for meeting the functions of detection and meter changing. Three groups of current wiring terminals 17 and four groups of voltage wiring terminals 18 are arranged in the copper busbar, each group of current wiring terminals 17 comprises three current wiring terminal terminals 36 which are arranged side by side, the current wiring terminal terminals 36 are used for enabling circuits to be communicated, and the current wiring terminal terminals 36 are copper bars; each set of voltage terminals 18 includes at least one voltage terminal 37 for connecting the circuit, and the voltage terminal 37 is a copper bar.
Specifically, 13 lattices are arranged inside the three-phase four-wire united junction box, as shown in fig. 2, wherein the serial numbers 1 to 13 indicate the sequence of 13 lattices. Specifically, cells 1, 5, 9 and 13 are voltage terminal terminals 37, and cells 2-4, 6-8, 10-12 are current terminal terminals 36. Wherein the voltage switch 20 is arranged on the voltage terminal 37 in the 1 st, 5 th, 9 th and 13 th grids, so that the inlet and outlet terminals of the upper and lower ends of the voltage terminal 37 are communicated, and the voltage connecting contact 23 is arranged on the upper side or the lower side of the voltage switch 20. The detection switches 19 are respectively arranged between the 2 nd and 3 rd grids, the 6 th and 7 th grids, the 10 th and 11 th grids, so that the adjacent 2 nd and 3 rd grids, the 6 th and 7 th grids, the 10 th and 11 th grids are connected left and right, and the table changing switches 21 are respectively arranged between the 3 rd and 4 th grids, the 7 th and 8 th grids, and the 11 th and 12 th grids, and the table changing switches 21 can be used for connecting the adjacent 3 rd and 4 th grids, the 7 th and 8 th grids, and the 11 th and 12 th grids; a current connecting contact 22 is arranged on the 2 nd and 3 rd lattices, the 6 th and 7 th lattices, and the 10 th and 11 th lattices respectively, and the current connecting contact 22 is arranged between the detection switch 19 and the meter changing switch 21.
Specifically, the base cover 15 is connected with the base 14 in a clamping manner, the four corners of the opening side of the base cover 15 are provided with buckles, the four corners of the upper side of the base 14 are provided with clamping grooves, and the buckles and the clamping grooves are arranged oppositely.
As shown in fig. 4, specifically, the body of the test fixture 29 includes a test fixture bottom plate 38, the upper side surface of the test fixture bottom plate 38 is provided with a detection button 31, a current test hole 32, and a voltage test hole 33, four test fixture insertion posts 39 are uniformly arranged at four corners of the test fixture bottom plate 38, wherein the detection button 31 is arranged opposite to the detection switch through hole 24, the detection button 31 contacts with the button of the detection switch 19 through the detection switch through hole 24, the current test hole 32 is arranged opposite to the current connection contact through hole 26, and the voltage test hole 33 is arranged opposite to the voltage connection contact through hole 28; the test fixture inserting column 39 is vertically arranged on the lower side of the bottom plate, four inserting grooves 40 are formed in the upper side of the base cover 15, the inserting grooves 40 are opposite to the test fixture inserting column 39, and the body of the test fixture 29 is inserted into the base cover 15.
Specifically, the test fixture base plate 38 is provided with a detection button hole 41, the detection button 31 is inserted into the detection button hole 41, and the lower end of the detection button 31 contacts with the button of the detection switch 19. The detection button 31 is arranged perpendicular to the test fixture base plate 38. The test button 31 is a push button made of an insulating material.
Specifically, a current connecting piece penetrates through the current testing hole 32, and a first annular bulge is arranged at the upper end of the current connecting piece and is used for being connected with a current testing line of the current calibration instrument; the lower end of the current connection member is provided with a first cylindrical protrusion which is inserted into the current connection contact passing hole 26 to be connected with the current connection contact 22. The current connectors are arranged perpendicular to the test fixture base plate 38. The first annular protrusion and the first cylindrical protrusion are connected or integrally formed to constitute a current connecting member. The first cylindrical protrusion and the first annular protrusion are made of a conductive material, and may be a metal conductive material. The outer side wall of the first annular bulge is laid with an insulating material.
Specifically, a voltage connecting piece penetrates through the voltage testing hole 33, and a second annular bulge is arranged at the upper end of the voltage connecting piece and is used for being connected with a voltage testing line of the existing calibration instrument; the lower end of the voltage connection member is provided with a second cylindrical protrusion which is inserted into the voltage connection contact passing hole 28 to be connected with the voltage connection contact 23. The voltage connectors are arranged perpendicular to the test fixture base plate 38. The second annular protrusion and the second cylindrical protrusion are connected or integrally formed to constitute a current connecting member. The second cylindrical protrusion and the second annular protrusion are made of a conductive material, which may be a metal conductive material. And an insulating material is laid on the outer side wall of the second annular protrusion.
Specifically, the test tool base plate 38 may be a square plate and made of an insulating material. A test tool handle can be arranged on two opposite sides of the square plate respectively and connected with the test tool insertion column 39, so that the body of the test tool 29 can be conveniently detached.
It can be understood that the pressing type detection switch and the contact pin type meter changing switch are arranged, and the detection switch and the meter changing switch are fixed on a wiring terminal in the base, namely a copper bar in the base, wherein the detection switch can switch a current loop when checking the meter, and the current calibrator is seamlessly connected into a test loop; the meter changing switch is used for changing the electric energy meter and can carry out short-circuit operation on the circuit. The circuit is switched by adopting the combined switch mode, so that the standard operation is facilitated, and the working efficiency is improved; meanwhile, the detection switch and the meter changing switch are multi-contact path switches, so that the mode of crimping a wire can be effectively optimized, the electrified contact area is increased, the applicable frequency of a screw is reduced, and the internal circuit of the junction box can be effectively prevented from being switched due to the damage of the screw end; and the switch is completely isolated from the circuit, so that an operator does not need to carry out live working, the operation of the switch is simple and easy, the condition that the operator does not carry out live working is avoided, and the safety is improved.
As shown in fig. 5, specifically, the body of the table changing tool 30 is inserted into the upper side of the bottom surface of the base cover 15, the body of the table changing tool 30 includes a table changing tool bottom plate 42, a pin unthreaded hole 34 and a voltage button 35 are arranged on the table changing tool bottom plate 42, four table changing tool insertion columns 43 are uniformly arranged at four corners of the table changing tool bottom plate 42, wherein the pin unthreaded hole 34 is arranged opposite to the table changing switch through hole 25, and the voltage button 35 is arranged opposite to the voltage switch through hole 27 and contacts with the button of the voltage switch 20; trade table frock plug-in post 43 sets up the downside at trade table frock bottom plate 42 perpendicularly, and the upside of base lid 15 is provided with four inserting grooves 40, and inserting grooves 40 sets up with trade table frock plug-in post 43 relatively to make test fixture 29's body peg graft mutually with base lid 15.
Specifically, the dial changing fixture base plate 42 is provided with a voltage button light hole 44, the voltage button 35 is inserted into the voltage button light hole 44, and the lower end of the voltage button 35 contacts with the button of the voltage switch 20. The voltage button 35 is perpendicular to the bottom plate 42 of the meter replacing tool. The bottom plate 42 of the dial-up fixture is a square plate made of an insulating material. And meter changing tool handles can be arranged on two opposite sides of the square plate respectively and connected with the meter changing tool inserting columns 43 so as to conveniently disassemble the body of the meter changing tool 30.
It can be understood that the voltage switch and the meter-changing switch are fixed on a wiring terminal in the base, namely a copper bar in the base, by arranging the press-type voltage switch and the pin-type meter-changing switch, wherein the voltage switch can switch a voltage loop when the meter is changed, and the current calibrator is seamlessly connected into a test loop; the meter changing switch is used for changing the electric energy meter and can carry out short-circuit operation on the circuit. The circuit is switched by adopting the combined switch mode, so that the standard operation is facilitated, and the working efficiency is improved; meanwhile, the voltage switch and the meter changing switch are multi-contact path switches, so that the mode of crimping a wire can be effectively optimized, the electrified contact area is increased, the applicable frequency of a screw is reduced, and the internal circuit of the junction box can be effectively prevented from being switched due to the damage of the screw end; and the switch is completely isolated from the circuit, so that an operator does not need to carry out live working, the operation of the switch is simple and easy, the condition that the operator does not carry out live working is avoided, and the safety is improved.
In another implementation based on the above embodiment, as shown in fig. 6, this implementation provides a current detection switch structure, including: the detection switch 19 is arranged between two adjacent current terminal terminals 36, so that the two adjacent current terminal terminals 36 are opened or closed; two detection switch connecting grooves 45 are arranged in parallel at the lower part of one side surface of the detection switch 19, and the two detection switch connecting grooves 45 are connected with the current wiring terminal 36; the upper side of the detection switch 19 is provided with a detection switch button 46 which is pressed to control the connection or disconnection between the two detection switch connection grooves 45.
Specifically, the current detection switch structure further includes a base cover 15, the base cover 15 is an open box, and the open side of the open box is connected and closed with the base 14; the detection switch 19 is embedded on the inner bottom surface of the base cover 15. A groove is formed on the inner bottom surface of the base cover 15, and the groove is arranged opposite to the detection switch 19, so that the detection switch 19 is embedded in the groove. The bottom surface of the groove is provided with a unthreaded hole, the unthreaded hole is opposite to the detection switch button 46, and the detection switch button 46 penetrates through the unthreaded hole.
Specifically, the detection switch 19 has a rectangular configuration. The recess is a square structure disposed opposite to the detection switch 19. The detection switch button 46 has a cylindrical structure. The light hole is a circular light hole disposed opposite to the detection switch button 46. The coupling groove 45 is an arc-shaped groove. The current terminal 36 is provided with a connection hole, and the detection switch connection groove 45 is connected to the connection hole by a bolt or a screw.
The terminal box comprises a current terminal and a current detection switch, wherein the current terminal is provided with a pressing type voltage detection switch, the pressing type voltage detection switch is arranged on the current terminal, the use of bolts is reduced, the problem that the terminal box cannot work normally due to the fact that the bolts are loosened repeatedly or screwed down when voltage detection is carried out is avoided, the pressing type current detection switch is arranged, the repeated operation of the bolts is avoided, the service life of the current detection switch is greatly prolonged, and the service life of the terminal box is greatly prolonged; meanwhile, the pressing current detection switch is in an isolated state with the circuit, so that the condition of live working of testers is avoided, and the safety is improved.
In another implementation based on the above embodiment, as shown in fig. 7, this implementation provides a voltage detection switch structure, including: a base 14 and a push-type voltage switch 20, wherein the base 14 is provided with a voltage terminal 18, and the voltage switch 20 is arranged on the voltage terminal 18 to open or close the circuit of the voltage terminal 18; the lower parts of two opposite side surfaces of the voltage switch 20 are respectively provided with a voltage switch connecting groove 47, and the two voltage switch connecting grooves 47 are connected with the current wiring terminal 17; the upper side of the voltage switch 20 is provided with a voltage switch button 48 which is pressed to control the connection between the two voltage switches and the connection groove 47.
Specifically, the voltage detection switch structure further includes a base cover 15, the base cover 15 is an open box, and the open side of the open box is connected and closed with the base 14; the voltage switch 20 is embedded on the inner bottom surface of the base cover 15. A groove is formed on the inner bottom surface of the base cover 15, and the groove is arranged opposite to the voltage switch 20, so that the voltage switch 20 is embedded in the groove. The bottom surface of the groove is provided with a unthreaded hole, the unthreaded hole is arranged opposite to the voltage switch button 48, and the voltage switch button 48 is arranged in the unthreaded hole in a penetrating way.
Specifically, the voltage switch 20 has a rectangular structure. The recess is a square structure arranged opposite the voltage switch 20. The voltage switch button 48 has a cylindrical structure. The light hole is a circular light hole disposed opposite the voltage switch button 48. The voltage switch connection groove 47 is an arc-shaped groove. The voltage terminal 18 is provided with a connection hole, and the voltage switch connection groove 47 is connected with the connection hole through a bolt or a screw.
The terminal box comprises a voltage terminal and a pressing voltage detection switch, wherein the pressing voltage detection switch is arranged on the voltage terminal, the pressing voltage detection switch is arranged on the pressing voltage terminal, the number of bolts used is reduced, the problem that the terminal box cannot work normally due to the fact that the bolts are loosened repeatedly or screwed down when voltage detection is carried out is avoided, the pressing voltage detection switch is arranged, repeated operation of the bolts is avoided, the service life of the voltage detection switch is greatly prolonged, and the service life of the terminal box is greatly prolonged; meanwhile, the pressing voltage detection switch is in an isolated state with the circuit, so that the condition of live working of testers is avoided, and the safety is improved.
Specifically, the box cover 16, the base 14, and the base cover 15 in the above embodiments are made of transparent plastic. The detection switch 19 is a normally closed push switch, which may be a three-contact switch. The voltage switch 20 is a normally closed push switch, which may be a single-contact switch. The meter changing switch 21 is a normally open type plug-pull switch, and the meter changing switch 21 is opened or closed by inserting the pin 49 into the jack of the meter changing switch 21.
It can be understood that the junction box shell in the embodiment of the invention is made of transparent materials, so that hidden dangers at the connecting points inside the junction box can be found in time and can be treated in time, and the inside of the junction box is physically isolated, so that the danger of live working is avoided. The junction box is connected in a clamping manner, so that the connection reliability of the junction box is greatly improved.
The box cover 16, the base 14 and the base cover 15 can be made of high polymer polycarbonate material and ABS flame retardant plastic to be made into a transparent shell, so that a worker can visually detect the connection condition of the copper bar and observe whether conditions such as parts and contact positions in the copper bar are abnormal or not and whether metal components are rusted or not, and the internal condition of the junction box is clear at a glance; in addition, the transparent upper cover and the base are reliably and hard connected through a plurality of groups of buckles, if electricity stealing action occurs, the transparent shell can be observed, and obvious damage traces are left on the appearance of the shell.
The above embodiments replace the paddle in existing junction boxes by using a different type of switch inside the junction box. According to the actual need of the internal switching circuit of the junction box, a current switch and a voltage switch are arranged: for the switching of the current circuit, two types of combination switches of detection and meter changing are arranged to replace a plectrum for detection and a plectrum for meter changing in the original junction box respectively, and the overcurrent capacity of the switch completely meets the actual working requirement, so that the reliability and smoothness of a test loop are ensured; for the switching of the voltage circuit, a voltage circuit switch is provided. A current detection switch: the switch is a normally closed switch under the general working state, when the current calibration instrument is connected to detect, the circuit is disconnected by triggering the press button on each phase, so that the current calibration instrument is connected to a test loop, and the multi-contact path inside the switch meets the requirement of load in the working environment and can be reliably lapped to realize the on-off of the circuit. A voltage detection switch: the switch is a normally closed switch in a common working state, when the meter is changed, a voltage circuit is disconnected by triggering a press button on the switch, and when the three-phase meter changing switches are all in short circuit, the meter changing operation can be carried out.
The meter replacing tool and the test tool are used as matched equipment of field calibration equipment, and the meter checking tool and the meter replacing tool are arranged according to the working requirements of field meter checking and meter replacing. When the device is used, the voltage and current test wire is inserted into the test tool in advance according to requirements, then the test tool is clamped into the positioning groove on the junction box, the preset three-phase switch press button or the pin switch on the test tool is sequentially operated, the meter checking and changing operations can be realized, in addition, the use method that three phases are simultaneously operated and are completed at one time is adopted, and the safety and the high efficiency of the field detection work are greatly improved.
When detection is carried out, firstly, current and voltage test wires of field verification equipment are inserted into a test current hole site and a test voltage hole site of a meter test tool, then the test tool is clamped into a groove position fixed on a junction box, and when the test tool is reliably connected with the junction box, the tool is automatically locked.
According to the requirement of on-site detection operation, the condition of slight change of each phase of current is observed, meanwhile, the detection button is operated phase by phase, the current path is disconnected phase by phase as the button is pressed one by one, the external connecting lead is correspondingly connected into the test loop phase by phase, and finally the current calibrator is completely connected into the test loop; or before the three-phase current is clamped into the terminal box fixing groove, the pressing buttons corresponding to the three-phase current are pressed uniformly and then clamped into the terminal box fixing groove, the tool is automatically locked after the three-phase current is installed in place, the three-phase circuit is cut off simultaneously, an external test wire is connected into the test loop at one time, and the quick connection of the current calibration instrument is achieved. When the meter replacing operation is carried out, the meter replacing test tool is clamped into a fixed slot position on the junction box, and after the meter replacing test tool is reliably connected with the junction box, the tool is automatically locked. The voltage path in the circuit can be disconnected by pressing the button on the meter replacing tool one by one, the contact pins are inserted in sequence, and the meter can be detached after the current loop is short-circuited.
In another possible implementation manner based on the foregoing implementation manner, this implementation manner provides a multifunctional combined junction box with a test tool for electric energy metering, including: the device comprises a base 14, a base cover 15 and a test tool 29, wherein a current wiring terminal 17 and a voltage wiring terminal 18 are arranged on the base 14, a press-type detection switch 19 is arranged on the current wiring terminal 17, and a current connecting column used for being connected with a current calibration instrument is further arranged on the current wiring terminal 17; a voltage connecting column used for being connected with a current calibration instrument is arranged on the voltage connecting terminal 18; the base cover 15 is an open box, and the open side of the box is connected with the base 14 and closed; a detection switch passing hole 24 is provided on the bottom surface of the base cover 15, the detection switch passing hole 24 being disposed opposite to the button of the detection switch so as to allow the button of the detection switch 19 to pass therethrough; a current connecting column through hole is also formed in the bottom surface of the base cover 15 and is arranged opposite to the current connecting column so that the current connecting column can pass through; a voltage connecting column through hole is formed in the bottom surface of the base cover 15 and is arranged opposite to the voltage connecting column so that the voltage connecting column can pass through; the test fixture 29 comprises a test fixture bottom plate 38, a test button 31, a current test column and a voltage test column are arranged on the upper side surface of the test fixture bottom plate 38, four test fixture insertion columns 39 are uniformly arranged at four corners of the test fixture bottom plate 38, wherein the test button 31 is arranged opposite to the test switch through hole 24, and the test button 31 is in contact with the button of the test switch through hole 24; the current testing column and the current connecting column are arranged oppositely through holes, the lower end of the current testing column is connected with the current connecting column in a pluggable manner, and the other end of the current testing column is connected with a current testing line of the current calibrator in a pluggable manner; the voltage testing hole is opposite to the voltage connecting column through hole, the lower end of the voltage testing column is connected with the voltage connecting column in a pluggable manner, and the other end of the voltage testing column is connected with a voltage testing line of the current calibration instrument in a pluggable manner; the test fixture inserting column 39 is vertically arranged on the lower side of the test fixture bottom plate 38, four inserting grooves 40 are formed in the upper side of the base cover 15, the inserting grooves 40 are arranged opposite to the test fixture inserting column 39, and the test fixture inserting column 39 is inserted in the inserting grooves 40, so that the test fixture 29 is inserted into the base cover 15.
Specifically, the test fixture bottom plate 38 is provided with a current test hole 32, and the current test column is inserted into the current test hole 32. The upper end of the current testing column is provided with a current connecting groove of the current calibrator, and a current testing wire of the current calibrator is inserted into the current connecting groove of the current calibrator; the lower end of the current test column is provided with a current connecting column groove, and the current connecting column is inserted in the current connecting column groove. The current testing column is arranged in a manner that the current calibration instrument is connected with the current groove and the current connecting column groove and is vertically intersected with the testing tool bottom plate 38 along the central axis direction of the current testing column. The current testing column may be a hollow metal conductive tube.
Specifically, the test fixture bottom plate 38 is provided with a voltage test hole 33, and the voltage test column is inserted into the voltage test hole 33. The upper end of the voltage testing column is provided with a current calibration instrument voltage connecting groove, and a voltage testing wire of the current calibration instrument is inserted into the current calibration instrument voltage connecting groove; the lower end of the voltage testing column is provided with a voltage connecting column groove, and the voltage connecting column is inserted in the voltage connecting column groove. The voltage groove and the voltage connecting column groove are formed in the current calibration instrument along the central axis direction of the voltage testing column. The voltage testing column is perpendicularly intersected with the testing tool bottom plate 38. The current testing column may be a hollow metal conductive tube.
It can be understood that the current testing column and the current connecting contact 22 are arranged at the same position, and the current testing column can be integrally manufactured with the current connecting terminal 17, or can be a separately arranged metal connecting column connected with the current connecting terminal 17; the voltage testing column is arranged at the same position as the voltage connecting contact 23, and the voltage testing column can be integrally manufactured with the voltage connecting terminal 18 or can be a separately arranged metal connecting column which is connected with the voltage connecting terminal 18.
In another possible implementation manner based on the foregoing implementation manner, this implementation manner provides a multifunctional combined junction box for electric energy metering with a meter replacing tool, including: the device comprises a base 14, a base cover 15 and a meter changing tool 30, wherein a current wiring terminal 17 and a voltage wiring terminal 18 are arranged on the base 14, a pluggable meter changing switch 21 is arranged on the current wiring terminal 17, and a pin hole is arranged on the meter changing switch 21; a press-type voltage switch 20 is arranged on the voltage wiring terminal 18; the base cover 15 is an open box, and the open side of the box is connected with the base 14 and closed; the bottom surface of the base cover 15 is provided with a meter-changing switch through hole 25, and the meter-changing switch through hole 25 is opposite to the pin hole; a voltage switch passing hole 27 is further provided on the bottom surface of the base cover 15, the voltage switch passing hole 27 being disposed opposite to the button of the voltage switch 20 so as to pass the button of the voltage switch 20; the meter changing tool 30 is inserted on the upper side of the bottom surface of the base cover 15, the meter changing tool 30 comprises a meter changing tool bottom plate 42, a contact pin 49, a contact pin unthreaded hole 34 and a voltage button 35 are arranged on the meter changing tool bottom plate 42, four meter changing tool inserting columns 43 are uniformly arranged at four corners of the meter changing tool bottom plate 42, wherein the contact pin unthreaded hole 34 and the meter changing switch through hole 25 are oppositely arranged, and the contact pin is inserted in the contact pin hole through the contact pin unthreaded hole 34 and the meter changing switch through hole 25 so as to close the meter changing switch; the voltage button 35 is disposed opposite to the voltage switch passing hole 27 and contacts the button of the voltage switch 20; trade table frock plug-in post 43 sets up the downside at trade table frock bottom plate 42 perpendicularly, and the upside of base lid 15 is provided with four inserting grooves 40, and inserting grooves 40 sets up with trade table frock plug-in post 43 relatively to make test fixture 30 peg graft mutually with base lid 15.
The voltage switch and the meter changing switch are fixed on a wiring terminal in the base, namely a copper bar in the base, wherein the voltage switch can switch a voltage loop when changing the meter, and the current calibration instrument is seamlessly connected into a test loop; the meter changing switch is used for changing the electric energy meter and can carry out short-circuit operation on the circuit. By adopting the combined switch mode switching circuit, the standard operation is convenient, and the working efficiency is improved.
In another possible implementation manner based on the foregoing implementation manner, the present implementation manner provides a current detection switch structure for a multifunctional combined junction box for electric energy metering, including: the detection device comprises a base 14, a base cover 15 and a push-type detection switch 19, wherein the base 14 and the push-type detection switch 19 are provided, a current wiring terminal 17 is arranged on the base 14, the current wiring terminal 17 comprises three current wiring terminal terminals 36 arranged side by side, and the detection switch 19 is arranged between two adjacent current wiring terminal terminals 36, so that the two adjacent current wiring terminal terminals 36 are opened or closed; two detection switch connecting grooves 45 are arranged in parallel at the lower part of one side surface of the detection switch 19, and the two detection switch connecting grooves 45 are connected with the current wiring terminal 36; the upper side of the detection switch 19 is provided with a detection switch button 46 which is pressed to control the connection or disconnection between the two detection switch connection grooves 45. The base cover 15 is an open box, and the open side of the box is connected with the base 14 and closed; a detection switch passing hole 24 is provided on the bottom surface of the base cover 15, and the detection switch passing hole 24 is disposed opposite to the detection switch button 46 so that the detection switch button 46 passes through.
It can be understood that the detection switch button 46 can control the detection switch 19 after passing through the detection switch through hole 24, so that the convenience of the detection switch 19 is greatly improved, and meanwhile, the detection switch 19 is arranged in a cavity formed by closing the base 14 and the base cover 15 through the base cover 15, so that the safety performance of personnel operating the detection switch is also greatly ensured.
The pressing type voltage detection switch is arranged on the current wiring terminal, so that the use of bolts is reduced, the problem that the terminal box cannot work normally due to the fact that the bolts are loosened repeatedly or screwed down repeatedly during voltage detection is avoided, the pressing type current detection switch is arranged, the repeated operation of the bolts is avoided, the service life of the current detection switch is greatly prolonged, and the service life of the terminal box is greatly prolonged; meanwhile, the pressing current detection switch is in an isolated state with the circuit, so that the condition of live working of testers is avoided, and the safety is improved.
In another possible implementation manner based on the foregoing implementation manner, the present implementation manner provides a voltage detection switch structure, including: the device comprises a base 14, a base cover 15 and a press-type voltage switch 20, wherein a voltage wiring terminal 18 is arranged on the base 14, and the voltage switch 20 is arranged on the voltage wiring terminal 18 so as to open or close a circuit of the voltage wiring terminal 18; the lower parts of two opposite side surfaces of the voltage switch 20 are respectively provided with a voltage switch connecting groove 47, and the two voltage switch connecting grooves 47 are connected with the current wiring terminal 17; the upper side of the voltage switch 20 is provided with a voltage switch button 48 which is pressed to control the connection between the two voltage switches and the connection groove 47. The base cover 15 is an open box, and the open side of the box is connected with the base 14 to form a cavity; the base cover 15 is also provided on the bottom surface thereof with a voltage switch passing hole 27, and the voltage switch passing hole 27 is disposed opposite to the voltage switch button 48 to allow the voltage switch button 48 to pass therethrough.
It will be appreciated that the base 14 and base cover 15 are closed to form a cavity, the voltage switch 20 is disposed in the cavity, and the voltage switch button 48 is exposed from the cavity through the voltage switch passage hole 27 to facilitate the operation of the voltage switch 20 while the voltage switch 20 is in a completely isolated state, thereby greatly improving the safety of the voltage switch 20.
The pressing type voltage detection switch is arranged on the voltage wiring terminal, so that the use of bolts is reduced, the problem that the terminal box cannot work normally due to the fact that the bolts are loosened repeatedly or screwed down repeatedly during voltage detection is avoided, the repeated operation of the bolts is avoided by arranging the pressing type voltage detection switch, the service life of the voltage detection switch is greatly prolonged, and the service life of the terminal box is greatly prolonged; meanwhile, the pressing voltage detection switch is in an isolated state with the circuit, so that the condition of live working of testers is avoided, and the safety is improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. The utility model provides an electric energy measurement is with multi-functional joint current detection switch structure for terminal box which characterized in that includes: the calibration device comprises a base, a base cover and a pressing type detection switch, wherein the base cover is an open box body, the cross section of the base cover is the same as that of the base, the open side of the base cover is connected and closed with the base, a cavity is formed between the base and the base cover, the detection switch is arranged in the cavity, the detection switch is embedded on the inner bottom surface of the base cover, and the detection switch is used for switching a current loop so as to enable a current calibration instrument to be seamlessly connected into a test loop; wherein,
the base is provided with a current wiring terminal, the current wiring terminal comprises three current wiring sub-terminals arranged side by side, and the detection switch is arranged between two adjacent current wiring sub-terminals so as to enable the two adjacent current wiring sub-terminals to be opened or closed;
the lower part of one side surface of the detection switch is provided with two connecting grooves in parallel, and the two connecting grooves are connected with the current wiring terminal; a switch button is arranged on the upper side surface of the detection switch, and the connection grooves are controlled to be opened or closed by pressing;
a groove is formed in the inner bottom surface of the base cover, and the groove is arranged opposite to the detection switch, so that the detection switch is embedded in the groove;
the bottom surface of the groove is provided with a unthreaded hole, the unthreaded hole is opposite to the switch button, and the switch button is arranged in the unthreaded hole in a penetrating mode.
2. The structure of the current detecting switch for the multifunctional combined junction box for electric energy metering as claimed in claim 1, wherein the detecting switch has a square structure.
3. The structure of the current detecting switch for the multifunctional combined junction box for electric energy metering as claimed in claim 2, wherein the recess has a square structure disposed opposite to the detecting switch.
4. The structure of the current detection switch for the multifunctional combined junction box for electric energy metering as claimed in claim 1, wherein the switch button is of a cylindrical structure.
5. The structure of the current detection switch for the multifunctional combined junction box for electric energy metering as claimed in claim 4, wherein the light hole is a circular light hole disposed opposite to the switch button.
6. The structure of current detection switch for multifunctional combined junction box for electric energy metering according to any one of claims 1 to 5, wherein the connection groove is an arc-shaped groove.
7. The structure of the current detection switch for the multifunctional combined junction box for electric energy metering according to any one of claims 1 to 5, wherein a connection hole is formed on the current terminal, and the connection groove is connected with the connection hole through a bolt or a screw.
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| CN201811003902.5A CN109085400B (en) | 2018-08-30 | 2018-08-30 | Current detection switch structure for multifunctional combined junction box for electric energy metering |
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| CN201811003902.5A CN109085400B (en) | 2018-08-30 | 2018-08-30 | Current detection switch structure for multifunctional combined junction box for electric energy metering |
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| CN110286258A (en) * | 2019-08-10 | 2019-09-27 | 蚌埠市正园电子科技有限公司 | A kind of potentiometric detection equipment current divider |
| CN114629067B (en) * | 2022-03-11 | 2024-03-22 | 国网安徽省电力有限公司来安县供电公司 | Special metering connection terminal box for eliminating deficiency |
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