CN113125821A - Junction box for metering secondary circuit safety arc extinction - Google Patents
Junction box for metering secondary circuit safety arc extinction Download PDFInfo
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- CN113125821A CN113125821A CN202110373869.0A CN202110373869A CN113125821A CN 113125821 A CN113125821 A CN 113125821A CN 202110373869 A CN202110373869 A CN 202110373869A CN 113125821 A CN113125821 A CN 113125821A
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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
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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Abstract
The invention discloses a junction box for metering safe arc extinction of a secondary circuit, and relates to the technical field of power equipment; the arc extinguishing device comprises a box body, an inflow side current wiring terminal, an outflow side current wiring terminal, a rotating button, an arc extinguishing grid sheet, a contact connecting sheet and a movable rod on the rotating button, wherein the contact connecting sheet is electrically connected with the outflow side current wiring terminal; it is through box body, inflow side current terminal, outflow side current terminal, turn button, arc extinguishing bars piece, contact link piece and movable rod etc. and it is better to realize dress table and connect the electric operation security.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a junction box for metering safe arc extinction of a secondary circuit.
Background
In the electric power marketing work, when the electric energy meter and the concentrator are installed and connected to a team site for fault treatment or replaced, a voltage terminal and a short-sealing current terminal in a secondary circuit need to be disconnected, and after no voltage and current exist in a metering secondary circuit, a specific series of work such as disassembling each wiring terminal at the tail of the electric energy meter or the concentrator is started.
In the separation and combination of the voltage and current connecting pieces, attention needs to be paid to the preparation of tools and the insulation and electric shock prevention of human bodies, and attention also needs to be paid to the prevention of electric arcs in the connection and disconnection operations of the voltage and current connecting pieces, so that safety accidents caused by the electric arcs are avoided.
The arc is a self-sustaining discharge phenomenon, and can sustain stable combustion without extinguishing the arc for a relatively long time without having a very high voltage. According to statistics of scientific literature, when a circuit is disconnected in the atmosphere, as long as the voltage exceeds 12-20V, the disconnected current exceeds 0.2-1A, a cylindrical gas which has extremely high temperature and can emit strong light to conduct is generally generated in a contact gap, and the current is disconnected after the contact gap becomes an insulating medium until an arc is extinguished. The electric arc is a discharge phenomenon with strong power, when the short-circuit current of about 5A is cut off, the power emitted in the form of joule can reach 1000kW, the temperature with thousands of degrees centigrade or higher and strong radiation can be generated, and the solid, liquid or gas in the electric arc area can generate strong physical and chemical changes under the action of the electric arc, thereby causing serious secondary chain damage to the personal articles.
And the normal operation voltage of the secondary circuit is usually 0 +/-100V and 0 +/-220V on the site of processing metering faults, and the current is usually 0 +/-5A. In recent years, personal burn accidents caused by voltage failure or short-circuit current connection of junction boxes appear in metering sites of provinces, cities and counties in China, and great damage and pain are caused to injured workers and families.
Problems with the prior art and considerations:
how to solve the relatively poor technical problem of dress table electricity connection operation security.
Disclosure of Invention
The invention aims to solve the technical problem of providing a junction box for metering secondary circuit safety arc extinction, which realizes better safety of meter installation and power connection operation through a box body, an inflow side current wiring terminal, an outflow side current wiring terminal, a rotating button, an arc extinction grid sheet, a contact connecting sheet, a movable rod and the like.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a junction box for metering the safe arc extinction of a secondary loop comprises a box body, an inflow side current binding post and an outflow side current binding post which are arranged on the box body, a rotating button, an arc extinction grid plate, a contact connecting plate and a movable rod which is arranged on the rotating button, wherein the rotating button, the arc extinction grid plate, the contact connecting plate and the movable rod are arranged on the box body, the contact connecting sheet is lapped with the current binding post at the outflow side and is electrically connected and conducted, the arc extinguishing grid sheet is positioned beside the contact connecting sheet, the one end and the turn-button of movable rod are connected, and the other end of movable rod is that the free end is located between arc extinguishing bars piece and the contact even piece, and the movable rod switches on with flowing in side current terminal sliding contact and electricity connection, and pivoted turn-button drives the movable rod sliding fit on the current terminal of flowing in side, and the free end and the contact even piece overlap joint together and the electricity connection switch on or the free end and the contact even piece separation of movable rod and be close to the cooperation of arc extinguishing bars piece.
The further technical scheme is as follows: the movable rod comprises an L-shaped lever, a sliding connection sheet arranged on the lever and a contact arranged on the sliding connection sheet, one end of the lever is connected with the rotating button in a rotating mode, the middle of the lever is connected with the box body in a rotating mode, the other end of the lever is connected with the sliding connection sheet, the sliding connection sheet is in sliding contact with the inflow side current binding post and is electrically connected with the inflow side current binding post in a conducting mode, and the inflow side current binding post is electrically connected with the outflow side current binding post through the sliding connection sheet, the contact and the contact connection.
The further technical scheme is as follows: the movable rod further comprises a connecting rod located between the rotating button and the lever, one end of the connecting rod is rotatably connected with the rotating button, and the other end of the connecting rod is rotatably connected with the lever.
The further technical scheme is as follows: the connecting rod is a U-shaped connecting rod.
The further technical scheme is as follows: the movable rod further comprises a rotating shaft arranged in the middle of the lever, and the lever rotates on the box body by taking the rotating shaft as an axis through the rotating shaft.
The further technical scheme is as follows: the knob is a cross knob with a cross groove.
The further technical scheme is as follows: the current wiring terminals on the inflow side and the current wiring terminals on the outflow side form current wiring terminals, and the number of the current wiring terminals is three groups of current wiring terminals with the same structure and the same A-C phases; the rotating button, the arc extinguishing grid pieces, the contact connecting pieces and the movable rod form arc extinguishing structures, the number of the arc extinguishing structures is three, the three groups of arc extinguishing structures are respectively of A-C phases with the same structure, and the A-C phases of the arc extinguishing structures are correspondingly matched with the corresponding A-C phases of current wiring ends respectively.
The further technical scheme is as follows: the current connecting piece is arranged on the current binding post on the inflow side, one end of the current connecting piece is rotatably connected with the current binding post on the inflow side, and the other end of the current connecting piece is overlapped with the current binding post on the outflow side and is electrically connected, conducted or separated.
The further technical scheme is as follows: the voltage terminal comprises a load side voltage terminal and a power side voltage terminal.
The further technical scheme is as follows: the power supply side voltage wiring terminal is characterized by further comprising a voltage connecting sheet arranged on the power supply side voltage wiring terminal, one end of the voltage connecting sheet is rotatably connected with the power supply side voltage wiring terminal, and the other end of the voltage connecting sheet is overlapped with the load side voltage wiring terminal and is electrically connected with the load side voltage wiring terminal to be conducted or separated.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
firstly, a junction box for metering secondary circuit safety arc extinction comprises a box body, an inflow side current wiring terminal and an outflow side current wiring terminal which are arranged on the box body, a rotating button, an arc extinction grid sheet, a contact connecting sheet and a movable rod, wherein the rotating button, the arc extinction grid sheet and the contact connecting sheet are arranged on the box body, the contact connecting sheet is lapped with the current binding post at the outflow side and is electrically connected and conducted, the arc extinguishing grid sheet is positioned beside the contact connecting sheet, the one end and the turn-button of movable rod are connected, and the other end of movable rod is that the free end is located between arc extinguishing bars piece and the contact even piece, and the movable rod switches on with flowing in side current terminal sliding contact and electricity connection, and pivoted turn-button drives the movable rod sliding fit on the current terminal of flowing in side, and the free end and the contact even piece overlap joint together and the electricity connection switch on or the free end and the contact even piece separation of movable rod and be close to the cooperation of arc extinguishing bars piece. This technical scheme, it is through box body, inflow side current terminal, outflow side current terminal, turn button, arc extinguishing bars piece, contact even piece and movable rod etc. and it is better to realize dress table and connect the electric operation security.
The second, the movable rod includes the lever of L type, sets up sliding connection piece on the lever and sets up the contact on sliding connection piece, the one end and the turn-button of lever rotate to be connected, and the middle part and the box body of lever rotate to be connected, and sliding connection piece is connected to the other end of lever, sliding connection piece switches on with inflow side current terminal sliding contact and electricity connection, inflow side current terminal passes through sliding connection piece, contact and contact even piece and outflow side current terminal electricity and is connected. This technical scheme, the lever of L type more is favorable to the movable rod activity for the free end of movable rod moves between contact link piece and arc extinguishing bars piece, and is more reasonable in structure.
And thirdly, the movable rod further comprises a connecting rod positioned between the rotating button and the lever, one end of the connecting rod is rotatably connected with the rotating button, and the other end of the connecting rod is rotatably connected with the lever. This technical scheme can make the motion range of the free end of movable rod bigger through the connecting rod, makes things convenient for the free end of movable rod to stretch into the cavity on the arc extinguishing bars piece, and the arc extinguishing effect is better, and is more reasonable in structure.
Fourthly, the connecting rod is a U-shaped connecting rod. This technical scheme, the connecting rod of U type more conveniently links together turn button and lever equipment, and the connecting rod of U type and turn button normal running fit's more nimble, and the connecting rod of U type and lever normal running fit's more nimble, the structure is more reasonable.
And fifthly, the movable rod further comprises a rotating shaft arranged in the middle of the lever, and the lever rotates on the box body by taking the rotating shaft as an axis through the rotating shaft. This technical scheme, the movable rod uses the pivot to rotate on the box body as the axle center through the pivot, and the rotation performance is more stable, and the rotation effect is more nimble, and the structure is more reasonable.
Sixthly, the knob is a cross knob with a cross groove. This technical scheme uses the cross screwdriver to support the rotatory cross knob of cross recess, and the operation is more convenient nimble and the price/performance ratio is better, and the structure is more reasonable.
Seventhly, the inflow side current wiring terminal and the outflow side current wiring terminal form current wiring terminals, and the number of the current wiring terminals is three groups of A-C phase current wiring terminals with the same structure; the rotating button, the arc extinguishing grid pieces, the contact connecting pieces and the movable rod form arc extinguishing structures, the number of the arc extinguishing structures is three, the three groups of arc extinguishing structures are respectively of A-C phases with the same structure, and the A-C phases of the arc extinguishing structures are correspondingly matched with the corresponding A-C phases of current wiring ends respectively. This technical scheme is applied to the safe arc extinguishing of measurement secondary circuit three-phase electricity through three group's current wiring ends and arc extinguishing structure, and the suitability is better, and the structure is more reasonable.
And the current connecting piece is arranged on the current binding post on the inflow side, one end of the current connecting piece is rotatably connected with the current binding post on the inflow side, and the other end of the current connecting piece is lapped with the current binding post on the outflow side and is electrically connected with the current binding post on the outflow side for conduction or separation. This technical scheme will flow into side current terminal through the current connection piece and rotate and flow out side current terminal and open circuit or short circuit, and the electrical property is more stable, and the structure is more reasonable.
And the ninth step, the power supply box also comprises a zero line terminal and a voltage terminal which are arranged on the box body, wherein the voltage terminal comprises a load side voltage terminal and a power supply side voltage terminal. This technical scheme, the suitability is better, and the structure is more reasonable.
Tenth, still including setting up the voltage connection piece on power supply side voltage terminal, the one end of voltage connection piece rotates with power supply side voltage terminal and is connected, and the other end of voltage connection piece and load side voltage terminal overlap joint together and the electricity is connected and is switched on or the separation. According to the technical scheme, the power supply side voltage wiring terminal and the load side voltage wiring terminal are in open circuit or short circuit through the voltage connecting sheet, the electrical performance is stable, and the structure is reasonable.
See detailed description of the preferred embodiments.
Drawings
FIG. 1 is a structural view of the A-C phase wiring portion in the present invention;
FIG. 2 is a front view of FIG. 1;
fig. 3 is a structural view of an arc extinguishing structure of phase a in fig. 2;
fig. 4 is a structural view of the phase a terminal in fig. 2;
fig. 5 is a structural view of a warning lamp in the present invention.
Wherein: a phase 1A rotating button, a phase 2A connecting rod, a phase 3A lever, a phase 4A sliding connecting sheet, a phase 5A contact, a phase 6A contact connecting sheet, a phase 7A arc-extinguishing grid sheet, a phase 8-1A load side voltage wiring column, a phase 8-2A power supply side voltage wiring column, a phase 9A inflow side current wiring column, a phase 10A outflow side current wiring column, a phase 11A voltage connecting sheet, a phase 12A current connecting sheet, a phase 13A connecting point and a phase 14A wiring part, the lamp comprises a 15B phase wiring part, a 16C phase wiring part, a 17 zero line wiring terminal, a 18-1 first lamp, a 18-2 second lamp, a 18-3 third lamp, a 18-4 fourth lamp, a 18-5 fifth lamp, a 18-6 sixth lamp, a 18-7 seventh lamp, a 18-8 eighth lamp, a 18-9 ninth lamp, a 18-10 tenth lamp, a 19A phase rotating shaft and a 20 box body.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited to the specific embodiments disclosed below.
As shown in fig. 1 to 5, the invention discloses a junction box for metering safe arc extinction of a secondary circuit, which comprises a box body 20, a current terminal fixed on the box body 20, a zero line terminal, a voltage terminal and an alarm lamp, an arc extinction structure installed on the box body 20, a current connecting sheet installed on the current terminal and a voltage connecting sheet installed on the voltage terminal, wherein the zero line terminal comprises a zero line terminal 17 and a zero line connecting sheet.
As shown in fig. 1, 2 and 4, the number of the voltage terminals is three groups of voltage terminals of a-C phases with the same structure, the a-phase voltage terminal includes an a-phase load side voltage terminal 8-1 and an a-phase power source side voltage terminal 8-2, the B-phase voltage terminal includes a B-phase load side voltage terminal and a B-phase power source side voltage terminal, and the C-phase voltage terminal includes a C-phase load side voltage terminal and a C-phase power source side voltage terminal.
As shown in fig. 1, 2 and 4, the number of the voltage connection pieces is three groups of voltage connection pieces of a-C phases with the same structure, one end of an a-phase voltage connection piece 11 is rotatably connected with an a-phase power supply side voltage terminal 8-2, the other end of the a-phase voltage connection piece 11 is lapped with an a-phase load side voltage terminal 8-1 and is electrically connected and conducted or separated, one end of a B-phase voltage connection piece is rotatably connected with a B-phase power supply side voltage terminal, the other end of the B-phase voltage connection piece is lapped with a B-phase load side voltage terminal and is electrically connected and conducted or separated, one end of a C-phase voltage connection piece is rotatably connected with a C-phase power supply side voltage terminal, and the other end of the C-phase voltage connection piece is lapped with a C-phase load side.
As shown in fig. 1, 2 and 4, the number of the current terminals is three groups of current terminals of a-phase to C-phase with the same structure, the a-phase current terminal includes an a-phase inflow side current terminal 9, an a-phase outflow side current terminal 10 and an a-phase connection point 13 fixed on the a-phase outflow side current terminal 10, the B-phase current terminal includes a B-phase inflow side current terminal, a B-phase outflow side current terminal and a B-phase connection point fixed on the B-phase outflow side current terminal, and the C-phase current terminal includes a C-phase inflow side current terminal, a C-phase outflow side current terminal and a C-phase connection point fixed on the C-phase outflow side current terminal.
As shown in figure 1 of the drawings, in which, as shown in fig. 2 and 4, the current connection pieces are three groups of current connection pieces of phase a to phase C having the same structure, one end of the phase a current connection piece 12 is rotatably connected to the phase a inflow side current terminal 9, the other end of the phase a current connection piece is overlapped with the phase a connection point 13 of the phase a outflow side current terminal 10 and is electrically connected to or separated from the phase a current connection piece, one end of the phase B current connection piece is rotatably connected to the phase B inflow side current terminal, the other end of the phase B current connection piece is overlapped with the phase B connection point of the phase B outflow side current terminal and is electrically connected to or separated from the phase B connection point, one end of the phase C current connection piece is rotatably connected to the phase C inflow side current terminal, and the other end of the phase C current connection piece is overlapped with the phase C connection point of the phase C outflow side current terminal and.
As shown in fig. 1 and 2, the number of the arc extinguishing structures is three groups of arc extinguishing structures of phases a to C with the same structure.
As shown in fig. 2 to 4, the a-phase arc extinguishing structure includes an a-phase rotating button 1, an a-phase movable rod, an a-phase contact connecting piece 6 and an a-phase arc extinguishing grid piece 7, the a-phase movable rod includes an a-phase connecting rod 2, an L-shaped a-phase lever 3, an a-phase sliding connecting piece 4 and an a-phase contact 5 which are connected in sequence, and an a-phase rotating shaft 19 fixed in the middle of the a-phase lever 3, the a-phase connecting rod 2 is a U-shaped connecting rod, the a-phase connecting rod 2 is located between the a-phase rotating button 1 and the a-phase lever 3, one end of the a-phase connecting rod 2 is rotatably connected with the a-phase rotating button 1, the other end of the a-phase connecting rod 2 is rotatably connected with the a-phase lever 3, the a-phase sliding connecting piece 4 is fixedly connected with the a-phase lever 3, the a-phase sliding connecting piece 4 is in sliding contact with and electrically connected with the, a looks contact 5 is the free end of A looks movable rod, A looks pivot 19 and the middle part fixed connection of A looks lever 3, and A looks pivot 19 rotates with box body 20 to be connected, A looks lever 3 uses A looks pivot 19 to rotate on box body 20 as the axle center through A looks pivot 19.
As shown in fig. 3, the phase a knob 1 is a cross knob with a cross recess.
The A-phase contact connecting piece 6 and the A-phase outlet side current binding post 10 are lapped together and are electrically connected and conducted.
The A-phase arc extinguishing grid plate 7 is positioned beside the A-phase contact connecting plate 6.
The A-phase contact 5 is positioned between the A-phase arc-extinguishing grid plate 7 and the A-phase contact connecting plate 6.
The rotating A-phase rotating button 1 drives the A-phase lever 3 to rotate on the box body 20 by taking the A-phase rotating shaft 19 as an axis through the A-phase connecting rod 2, the rotating A-phase lever 3 drives the A-phase sliding connecting sheet 4 and the A-phase contact 5 to swing between the A-phase arc-extinguishing grid sheet 7 and the A-phase arc-extinguishing grid sheet 6, the A-phase sliding connecting sheet 4 is in sliding contact fit with the A-phase inflow side current wiring terminal 9, the A-phase contact 5 and the A-phase arc-extinguishing grid sheet 6 are in lap joint together, or the A-phase contact 5 and the A-phase arc-extinguishing grid sheet 6 are separated and extend into the A-phase arc-extinguishing.
When the phase a contact 5 and the phase a contact link 6 are lapped together, the phase a inflow side current terminal 9 is electrically connected and conducted with the phase a outflow side current terminal 10 through the phase a sliding connection piece 4, the phase a contact 5 and the phase a contact link 6.
The B-phase arc extinguishing structure comprises a B-phase rotating button, a B-phase movable rod, a B-phase contact connecting piece and a B-phase arc extinguishing grid piece, wherein the B-phase movable rod comprises a B-phase connecting rod, an L-shaped B-phase lever, a B-phase sliding connecting piece, a B-phase contact and a B-phase rotating shaft fixed in the middle of the B-phase lever, which are sequentially connected, and when the B-phase contact and the B-phase contact connecting piece are lapped together, the B-phase current wiring terminal on the side where the B-phase flows in is electrically connected and conducted with the B-phase current wiring terminal on the side where the B-phase flows out through the B-phase.
The C-phase arc extinguishing structure comprises a C-phase rotating button, a C-phase movable rod, a C-phase contact connecting piece and a C-phase arc extinguishing grid piece, wherein the C-phase movable rod comprises a C-phase connecting rod, an L-shaped C-phase lever, a C-phase sliding connecting piece, a C-phase contact and a C-phase rotating shaft fixed in the middle of the C-phase lever, which are sequentially connected, and when the C-phase contact and the C-phase contact connecting piece are lapped together, the C-phase current wiring terminal on the side where the C-phase current flows in is electrically connected and conducted with the C-phase current wiring terminal on the side where the C-phase current flows out through the C.
Namely, the arc extinguishing structures of the A-C phases are correspondingly matched with the current wiring ends of the corresponding A-C phases respectively.
As shown in fig. 1, the a-phase voltage terminal, the a-phase voltage connecting piece 11, the a-phase current terminal, and the a-phase current connecting piece 12 form an a-phase terminal, the B-phase voltage terminal, the B-phase current terminal, and the B-phase current connecting piece form a B-phase terminal, and the C-phase voltage terminal, the C-phase voltage connecting piece, the C-phase current terminal, and the C-phase current connecting piece form a C-phase terminal.
As shown in fig. 1, the a-phase arc extinguishing structure and the a-phase terminal form an a-phase wiring portion 14, the B-phase arc extinguishing structure and the B-phase terminal form a B-phase wiring portion 15, and the C-phase arc extinguishing structure and the C-phase terminal form a C-phase wiring portion 16.
As shown in FIG. 5, the warning lamp includes a first lamp 18-1 connected to the A-phase load side voltage terminal 8-1 for warning, a second lamp 18-2 connected to the A-phase inflow side current terminal for warning, a third lamp 18-3 connected to the A-phase outflow side current terminal for warning, a fourth lamp 18-4 connected to the B-phase load side voltage terminal for warning, a fifth lamp 18-5 connected to the B-phase inflow side current terminal for warning, a sixth lamp 18-6 connected to the B-phase outflow side current terminal for warning, a seventh lamp 18-7 connected to the C-phase load side voltage terminal for warning, an eighth lamp 18-8 connected to the C-phase inflow side current terminal for warning, a ninth lamp 18-9 connected to the C-phase outflow side current terminal for warning, and a tenth lamp 18 connected to the neutral line terminal for warning -10.
Wherein, box body, voltage wiring end, electric current wiring end and zero line wiring end itself are prior art and no longer repeated herein, and alarm lamp itself and corresponding electric connection technique are prior art and no longer repeated herein.
The invention concept of the application is as follows:
according to the invention, the arc extinguishing function in the junction box is realized through the change of the current mode of the short-sealing secondary current wiring terminal, the short-sealing secondary current effect is enhanced through the external rotary connecting piece, and the third alarm lamp gives an early warning to protect the safety of workers.
Technical contribution of the present application:
the phase a wiring portion 14, the phase B wiring portion 15, and the phase C wiring portion 16 are three phase a \ B \ C regions, respectively, and have complete homogeneity, and the phase B wiring portion 15 and the phase C wiring portion 16 are the same as each other, taking the phase a wiring portion 14 as a sample.
The phase A rotating knob 1 is a rotatable structure with a cross groove, a phase A connecting rod 2 is a U-shaped connecting column, a phase A lever 3 is an L-shaped lever, a phase A sliding connecting sheet 4 is a metal connecting sheet, a phase A contact 5 is a contact, a phase A connecting sheet 6 is a contact connecting sheet, a phase A arc extinguishing grid sheet 7 is an arc extinguishing grid sheet group, a phase A load side voltage wiring terminal 8-1 is a voltage wiring terminal of a load side, a phase A power supply side voltage wiring terminal 8-2 is a voltage wiring terminal of a power supply side, a phase A inflow side current wiring terminal 9 is an inflow side current wiring terminal, a phase A outflow side current wiring terminal 10 is an outflow side current wiring terminal, an phase A voltage connecting sheet 11 is a voltage connecting sheet, a phase current connecting sheet 12 is a current connecting sheet which can be connected with the phase A inflow side current wiring terminal 9 and the phase A phase outflow side current wiring terminal 10 through rotation, and a phase A phase current connecting point 13 is a connecting point of the phase A phase.
During the electricity work is connect to the measurement dress table, for the injury of the high voltage to the human body that produces when preventing to electrocute and mutual-inductor wiring end open circuit, require:
firstly, the connection between the A-phase load side voltage wiring terminal 8-1 and the A-phase power supply side voltage wiring terminal 8-2 is required to be disconnected during operation, and the A-phase load side voltage wiring terminal 8-1 is ensured to be uncharged.
Second, there is a reliable connection between phase a inflow side current terminal 9 and phase a outflow side current terminal 10.
The working principle of the scheme is as follows:
firstly, the A-phase rotating button 1 is rotated to drive the A-phase connecting rod 2 and the A-phase lever 3 to enable the A-phase sliding connecting piece 4 to enter the range of the A-phase arc-extinguishing grid piece 7, and once an arc is generated when the A-phase contact 5 is contacted with the A-phase contact connecting piece 6, the arc can be absorbed and extinguished by the A-phase arc-extinguishing grid piece 7.
And secondly, the connection between the phase A current connecting sheet 12 and the phase A connecting point 13 ensures that the phase A inflow side current terminal 9 and the phase A outflow side current terminal 10 are reliably connected.
And thirdly, after the first and second work is finished, the alarm lamp simultaneously measures and alarms the electrified conditions of a voltage binding post 8-1 at the A-phase load side, a current binding post 9 at the A-phase inflow side, a current binding post 10 at the A-phase outflow side, a B-phase wiring part 15, a C-phase wiring part 16 and a zero line binding post 17 in the same area.
After the application runs secretly for a period of time, the feedback of field technicians has the advantages that:
the arc extinguishing device comprises a box body, an inflow side current wiring terminal, an outflow side current wiring terminal, a rotating button, an arc extinguishing grid sheet, a contact connecting sheet and a movable rod on the rotating button, wherein the contact connecting sheet is electrically connected with the outflow side current wiring terminal; it is through box body, inflow side current terminal, outflow side current terminal, turn button, arc extinguishing bars piece, contact link piece and movable rod etc. and it is better to realize dress table and connect the electric operation security.
The technical scheme of the invention fundamentally solves the electric arc phenomenon widely existing in the voltage-breaking or short-sealing current connecting piece, and ensures the operation safety of meter-installing and power-connecting personnel in work.
The innovation point of the achievement lies in important improvement and functional breakthrough of the safety of the tools and appliances, fundamentally solves the electric arc phenomenon widely existing in a voltage failure or short-sealed current connecting piece, effectively prevents the electric arc possibly generated in live-wire operation from harming the human body, and can reliably ensure the personal safety of the meter-installing and power-connecting operation personnel and the safety of equipment.
In a normal operation state, the phase-a current connecting sheet 12 is in a disconnected state, the phase-a inflow side current terminal 9 is connected with one end of an electricity meter, the phase-a outflow side current terminal 10 is connected with the other end of the electricity meter, the potential difference between the phase-a inflow side current terminal 9 and the phase-a outflow side current terminal 10 is close to 0, and no voltage exists.
When the electricity meter is changed, the A-phase inflow side current binding post 9 and the A-phase outflow side current binding post 10 are respectively disconnected with the electricity meter, a high-voltage electromotive force, namely a high-voltage potential difference, can be generated due to an open circuit between the A-phase inflow side current binding post 9 and the A-phase outflow side current binding post 10, and discharge and electric arcs can be generated due to human body contact to cause injury to people.
Therefore, when the ammeter is replaced, the phase a inflow side current terminal 9 and the phase a outflow side current terminal 10 need to be connected through the phase a current connecting sheet 12 to form a closed loop, and a high-voltage electromotive force, i.e., a high-voltage potential difference, does not exist between the phase a inflow side current terminal 9 and the phase a outflow side current terminal 10, so that the working safety of workers during the ammeter replacement is ensured.
Claims (10)
1. The utility model provides a terminal box for measuring secondary circuit safety arc extinguishing, includes the box body, sets up inflow side current terminal and outflow side current terminal on the box body, its characterized in that: still including setting up knob, arc extinguishing bars piece and the contact even piece on the box body and setting up the movable rod on the knob, the contact even piece is in the same place and the electricity is connected and switches on with outflow side current terminal overlap joint, the arc extinguishing bars piece is located the next door of the contact even piece, the one end and the knob of movable rod are connected, and the other end of movable rod is located between arc extinguishing bars piece and the contact even piece for the free end, and the movable rod switches on with inflow side current terminal sliding contact and electricity connection, and pivoted knob drives the movable rod sliding fit on the inflow side current terminal, and the free end of movable rod links the piece overlap joint together and the electricity is connected and is switched on or the free end and the contact of movable rod even piece separation and be close to the cooperation of arc extinguishing bars piece.
2. The junction box for metered secondary circuit safety arc extinction as claimed in claim 1, wherein: the movable rod comprises an L-shaped lever, a sliding connection sheet arranged on the lever and a contact arranged on the sliding connection sheet, one end of the lever is connected with the rotating button in a rotating mode, the middle of the lever is connected with the box body in a rotating mode, the other end of the lever is connected with the sliding connection sheet, the sliding connection sheet is in sliding contact with the inflow side current binding post and is electrically connected with the inflow side current binding post in a conducting mode, and the inflow side current binding post is electrically connected with the outflow side current binding post through the sliding connection sheet, the contact and the contact connection.
3. A junction box for metered secondary circuit safety arc extinction as claimed in claim 2 wherein: the movable rod further comprises a connecting rod located between the rotating button and the lever, one end of the connecting rod is rotatably connected with the rotating button, and the other end of the connecting rod is rotatably connected with the lever.
4. A junction box for metered secondary circuit safety arc extinction as claimed in claim 3 wherein: the connecting rod is a U-shaped connecting rod.
5. A junction box for metered secondary circuit safety arc extinction as claimed in claim 2 wherein: the movable rod further comprises a rotating shaft arranged in the middle of the lever, and the lever rotates on the box body by taking the rotating shaft as an axis through the rotating shaft.
6. The junction box for metered secondary circuit safety arc extinction as claimed in claim 1, wherein: the knob is a cross knob with a cross groove.
7. The junction box for metered secondary circuit safety arc extinction as claimed in claim 1, wherein: the current wiring terminals on the inflow side and the current wiring terminals on the outflow side form current wiring terminals, and the number of the current wiring terminals is three groups of current wiring terminals with the same structure and the same A-C phases; the rotating button, the arc extinguishing grid pieces, the contact connecting pieces and the movable rod form arc extinguishing structures, the number of the arc extinguishing structures is three, the three groups of arc extinguishing structures are respectively of A-C phases with the same structure, and the A-C phases of the arc extinguishing structures are correspondingly matched with the corresponding A-C phases of current wiring ends respectively.
8. The junction box for metered secondary circuit safety arc extinction as claimed in claim 1, wherein: the current connecting piece is arranged on the current binding post on the inflow side, one end of the current connecting piece is rotatably connected with the current binding post on the inflow side, and the other end of the current connecting piece is overlapped with the current binding post on the outflow side and is electrically connected, conducted or separated.
9. The junction box for metered secondary circuit safety arc extinction as claimed in claim 1, wherein: the voltage terminal comprises a load side voltage terminal and a power side voltage terminal.
10. The junction box for metered secondary circuit safety arc extinction as claimed in claim 9, wherein: the power supply side voltage wiring terminal is characterized by further comprising a voltage connecting sheet arranged on the power supply side voltage wiring terminal, one end of the voltage connecting sheet is rotatably connected with the power supply side voltage wiring terminal, and the other end of the voltage connecting sheet is overlapped with the load side voltage wiring terminal and is electrically connected with the load side voltage wiring terminal to be conducted or separated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110373869.0A CN113125821B (en) | 2021-04-07 | 2021-04-07 | Junction box for metering secondary circuit safety arc extinction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110373869.0A CN113125821B (en) | 2021-04-07 | 2021-04-07 | Junction box for metering secondary circuit safety arc extinction |
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| CN113125821A true CN113125821A (en) | 2021-07-16 |
| CN113125821B CN113125821B (en) | 2022-07-22 |
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|---|---|
| CN113125821B (en) | 2022-07-22 |
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