CN114141567B - Junction box - Google Patents
Junction box Download PDFInfo
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- CN114141567B CN114141567B CN202111489229.2A CN202111489229A CN114141567B CN 114141567 B CN114141567 B CN 114141567B CN 202111489229 A CN202111489229 A CN 202111489229A CN 114141567 B CN114141567 B CN 114141567B
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- Prior art keywords
- current
- voltage
- blade
- knife blade
- knife
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/12—Bases; Stationary contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/54—Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Keying Circuit Devices (AREA)
Abstract
The invention belongs to the technical field of electric power metering equipment, and discloses a junction box. The first current switch comprises a first current knife blade and a first current static contact, wherein the first current knife blade is provided with a first current opening position and a first current closing position. The second current switch comprises a second current knife blade and a second current static contact, wherein the second current knife blade is provided with a second current opening position and a second current closing position. When the first current knife blade is positioned at the first current opening position and the second current knife blade is positioned at the second current closing position, the ammeter is normally connected to the power line, and the first limiting piece can lock the relative position between the first current knife blade and the second current knife blade. When the first current knife blade is positioned at the first current closing position, and when the second current knife blade is positioned at the second current opening position, the ammeter is disconnected from the power line.
Description
Technical Field
The invention relates to the technical field of electric power metering equipment, in particular to a junction box.
Background
In the daily operation of a power line, a voltage transformer and a current transformer are generally used to measure the voltage or current of the power line. The voltmeter or ammeter is often required to be replaced under the condition of no power failure due to the operation and maintenance requirements of power production.
The ammeter needs to be short-circuited before replacement, and the condition of open circuit cannot occur, otherwise, high voltage can occur at two ends of the secondary side of the current transformer, and insulation breakdown is caused. Therefore, before replacing the ammeter, the ammeter needs to be short-circuited and then replaced. The two steps are typically controlled using separate switches, and neither switch allows for malfunction when the ammeter is not replaced. However, during the operation and maintenance of the power line, an operator often operates one of the switches by mistake, which results in damage or reduced accuracy of the current transformer.
Therefore, a junction box is needed to solve the above-mentioned problems.
Disclosure of Invention
According to one aspect of the present invention, there is provided a switch capable of limiting relative displacement between two current blades, preventing erroneous operation of one of the switches.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a junction box, comprising:
a junction box body;
the first current switch comprises a first current knife blade and a first current fixed contact fixedly connected to the junction box body, the first current knife blade is provided with a first current opening position and a first current closing position, and when the first current knife blade is positioned at the first current closing position, the first current knife blade is contacted with the first current fixed contact and is used for enabling an ammeter of the current transformer to be short-circuited; when the first current knife blade is positioned at a first current breaking position, the first current knife blade is separated from the first current static contact;
the second current switch comprises a second current knife blade and a second current fixed contact fixedly connected to the junction box body, the second current knife blade is provided with a second current opening position and a second current closing position, and when the second current knife blade is positioned at the second current closing position, the second current knife blade is contacted with the second current fixed contact and is used for enabling the ammeter to be connected to a power line; when the second current knife blade is positioned at a second current disconnection position, the second current knife blade is separated from the second current fixed contact and is used for disconnecting the ammeter from the power line;
when the first current knife blade is positioned at a first current opening position and the second current knife blade is positioned at a second current closing position, the first limiting piece can lock the relative position between the first current knife blade and the second current knife blade.
As a preferred scheme of the junction box, the junction box further comprises a voltage switch, wherein the voltage switch comprises a voltage static contact and a voltage knife blade which are fixedly connected to the junction box body, the voltage knife blade is provided with a voltage opening position and a voltage closing position, and when the voltage knife blade is positioned at the voltage closing position, the voltage knife blade is contacted with the voltage static contact and is used for enabling a voltmeter of a voltage transformer to be connected to the power line; when the voltage knife blade is positioned at the voltage disconnection position, the voltage knife blade is separated from the voltage static contact and is used for disconnecting the voltmeter from the power line.
As a preferred embodiment of the junction box, when the first current blade is located at a first current open position, the second current blade is located at a second current closed position, and the voltage blade is located at a voltage closed position, the first stopper may lock a relative position among the first current blade, the second current blade, and the voltage blade.
As a preferred scheme of the junction box, the junction box further comprises a second limiting piece, when the first current knife blade is located at a first current closing position and the second current knife blade is located at a second current opening position, the second limiting piece can lock the relative position between the first current knife blade and the second current knife blade.
As a preferred embodiment of the junction box, when the first current blade is located at a first current closing position, the second current blade is located at a second current opening position, and the voltage blade is located at a voltage opening position, the second limiting member may lock a relative position among the first current blade, the second current blade, and the voltage blade.
As a preferred embodiment of the junction box, the junction box further includes a first current-knife handle connected to the first current-knife blade, the junction box further includes a second current-knife handle connected to the second current-knife blade, and the junction box further includes a voltage-knife handle connected to the voltage-knife blade; the first limiting piece is a first pin, when the first current knife blade is located at a first current breaking position, the second current knife blade is located at a second current closing position, and the voltage knife blade is located at a voltage closing position, the first pin can sequentially pass through the voltage knife handle, the first current knife handle and the second current knife handle.
As a preferred scheme of the junction box, the second limiting piece is a second pin, and when the first current knife blade is located at a first current closing position, the second current knife blade is located at a second current opening position, and the voltage knife blade is located at a voltage opening position, the second pin can sequentially penetrate through the voltage knife handle, the first current knife handle and the second current knife handle.
As a preferable mode of the junction box, the first pin and the second pin are different in size.
As a preferable mode of the junction box, identifiers are respectively provided on the voltage knife switch handle, the first current knife switch handle and the second current knife switch handle.
As a preferred embodiment of the junction box, the first current switch is located between the voltage switch and the second current switch.
The beneficial effects of the invention are as follows:
when the first current knife blade is located at a first current opening position and the second current knife blade is located at a second current closing position, the first current knife blade is separated from the first current fixed contact, the second current knife blade is separated from the second current fixed contact and used for enabling the ammeter to be disconnected from the power line, and at the moment, the ammeter operates normally and is used for measuring the current of the power line. When the first current knife blade is located at a first current closing position and the second current knife blade is located at a second current opening position, the first current knife blade is in contact with the first current fixed contact and used for enabling the ammeter to be in short circuit, the second current knife blade is separated from the second current fixed contact and used for enabling the ammeter to be disconnected with the power line, and maintenance personnel can replace the ammeter under the condition that the power line normally operates. The relative position between the first current knife blade and the second current knife blade is locked through the first limiting piece, so that the damage or the reduction of accuracy of the ammeter caused by the fact that a maintainer independently operates one of the switches due to false touch can be prevented.
Drawings
FIG. 1 is a schematic view of a junction box according to a first embodiment of the present invention;
FIG. 2 is a schematic front view of a junction box according to a first embodiment of the present invention;
FIG. 3 is a schematic side view of a junction box according to a first embodiment of the invention;
FIG. 4 is a schematic circuit diagram of a junction box connected to a power line in an embodiment of the invention;
fig. 5 is a schematic structural diagram of a first current static contact, a second current static contact or a voltage static contact according to the first embodiment of the present invention;
fig. 6 is a schematic front view of a first current static contact, a second current static contact or a voltage static contact according to a first embodiment of the present invention.
In the figure:
1. a junction box body;
2. a voltage switch; 21. a voltage static contact; 22. a voltage knife blade; 23. a voltage knife switch handle;
3. a first current switch; 31. a first current stationary contact; 32. a first current blade; 33. a first current knife handle;
4. a second current switch; 41. a second current stationary contact; 42. a second current blade; 43. a second current knife handle;
5. a first pin; 51. a first pin connection hole; 52. a second pin connection hole;
6. a slot; 61. a sidewall; 62. a guiding part.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
Example 1
The ammeter needs to be short-circuited before replacement, and the condition of disconnection cannot occur. Therefore, before replacing the ammeter, the ammeter needs to be short-circuited and then replaced. The two steps are typically controlled using separate switches, and neither switch allows for malfunction when the ammeter is not replaced. However, during the operation and maintenance of the power line, an operator often operates one of the switches by mistake, which results in damage or reduced accuracy of the current transformer.
In order to solve the above-mentioned problem, this embodiment provides a terminal box, can restrict the relative displacement between two electric current switch blades, prevents one of them switch of maloperation, can realize simultaneously changing the ampere meter under the state of power line normal operating, can be used to electric power metering equipment technical field.
FIG. 1 is a schematic view showing the structure of a junction box in an embodiment of the present invention; FIG. 2 shows a schematic front view of a junction box in an embodiment of the invention; fig. 3 shows a schematic side view of a junction box in an embodiment of the invention. Referring to fig. 1 to 3, the junction box includes a junction box body 1, a first current switch 3, a second current switch 4, and a first stopper. The first current switch 3 includes a first current blade 32 and a first current fixed contact 31 fixedly connected to the wire box body 1, where the first current blade 32 may be connected to the wire box body 1 or may be connected to other devices, which is not limited. The second current switch 4 includes a second current blade 42 and a second current stationary contact 41 fixedly connected to the wire box body 1, and similarly, the second current blade 42 may be connected to the wire box body 1 or may be connected to other devices, which is not limited thereto.
Fig. 4 shows a schematic circuit diagram of the connection of the junction box to the power line in the embodiment of the invention. Referring to fig. 1-4, the first current blade 32 has a first current open position and a first current closed position, and the second current blade 42 has a second current open position and a second current closed position. The first current knife blade 32 and the first current static contact 31 are respectively connected to two ends of an ammeter of the current transformer, the second current knife blade 42 and the second current static contact 41 are connected to a circuit where the ammeter is located, that is, the first current knife blade 32 and the first current static contact 31 are connected in parallel with the ammeter, and the second current knife blade 42 and the second current static contact 41 are connected in series with the ammeter. When the first current knife blade 32 is positioned at the first current breaking position, the first current knife blade 32 is separated from the first current static contact 31; when the second current knife blade 42 is located at the second current closing position, the second current knife blade 42 is in contact with the second current static contact 41, so that the ammeter is connected to the power line, and the ammeter operates normally, and can detect the magnitude of the current of the power line.
With continued reference to fig. 1-4, since the ammeter is not allowed to open, when the first current blade 32 is in the first current closed position, the first current blade 32 contacts the first current stationary contact 31 for shorting the ammeter; when the second current blade 42 is located at the second current off position, the second current blade 42 is separated from the second current fixed contact 41, so as to disconnect the ammeter from the power line. At the moment, the power line operates normally, and maintenance personnel can replace the ammeter.
Referring to FIG. 4, an ammeter I A And the control process of the switch is described by taking the circuit as an example. In ammeter I A In normal operation, the first current blade 32 is located at a first current-off position, i.e. with the ammeter I A The first current knife blade 32 is separated from the first current static contact 31 in parallel, while the second current knife blade 42 is positioned at the second current closing position, namely, is positioned with the ammeter I A The second current knife blade 42 connected in series is contacted with the second current static contact 41 to enable the ammeter I to be A The power supply device is connected to a power line and is not short-circuited, and can normally operate. When the ammeter I needs to be replaced A When the first ammeter I is needed, the first ammeter blade 32 is first adjusted to the first ammeter closed position A Short-circuiting and then connecting in series with ammeter I A The second current blade 42 of (2) is adjusted to the second current off position, at this time, the normal operation of the power line is not affected, the current transformer is not damaged, and the maintenance personnel can replace the ammeter I A 。
With continued reference to fig. 1-3, the junction box further includes a first stop that is capable of locking the relative position between the first current blade 32 and the second current blade 42 when the first current blade 32 is in the first current open position and the second current blade 42 is in the second current closed position. Thus, under normal operation of the ammeter, the relative displacement between the first current blade 32 and the second current blade 42 is limited, and damage or degradation of accuracy of the ammeter caused by a single operation of one of the switches due to false touch by a maintainer is prevented.
With continued reference to fig. 1-3, the junction box further includes a second stop that is capable of locking the relative position between the first current blade 32 and the second current blade 42 when the first current blade 32 is in the first current closed position and the second current blade 42 is in the second current open position. When the ammeter is replaced, the relative displacement between the first ammeter blade 32 and the second ammeter blade 42 can be limited, and the damage to the current transformer caused by disconnection of a circuit or connection of the ammeter to a power circuit when the replacement and debugging of the ammeter are not completed is prevented.
With continued reference to fig. 1-3, the junction box further includes a voltage switch 2, where the voltage switch 2 includes a voltage stationary contact 21 and a voltage blade 22 that are fixedly connected to the junction box body 1, and the voltage blade 22 may be connected to the junction box body 1 or other devices, which is not limited thereto. The voltage knife blade 22 and the voltage static contact 21 are connected in series with the voltmeter, the voltage knife blade 22 is provided with a voltage opening position and a voltage closing position, when the voltage knife blade 22 is positioned at the voltage closing position, the voltage knife blade 22 is contacted with the voltage static contact 21 and is used for enabling the voltmeter of the voltage transformer to be connected to a power line, and at the moment, the voltage transformer normally operates; when the voltage knife blade 22 is located at the voltage disconnection position, the voltage knife blade 22 is separated from the voltage static contact 21 and used for disconnecting the voltmeter from the power line, namely, the voltmeter is disconnected, the power line operates normally at the moment, and meanwhile, maintenance staff can directly replace the voltmeter.
With continued reference to FIG. 4, a voltmeter U is used A And the control process of the switch is described by taking the circuit as an example. Due to voltmeter U A Short circuit is not allowed in the replacement process, so that the voltage knife blade 22, the voltage static contact 21 and the voltmeter U A Series voltmeter U A And the two ends of the power line are respectively connected with a live wire and a zero wire of the power line. When the voltage knife blade 22 is positioned at the voltage closing position, i.e. the voltage knife blade 22 is contacted with the voltage static contact 21, the voltmeter U A Normal operation; when the voltage blade 22 is in the voltage-off position, i.e. voltageWhen the knife blade 22 is separated from the voltage static contact 21, the voltmeter U A Breaking circuit, maintenance personnel can directly change voltmeter U at this moment A 。
With continued reference to fig. 1-4, in this embodiment, the three-phase four-wire transformer is used to measure the voltage and current of the power line, so the ammeter is provided with three, I A 、I B 、I C The three ampere meters are respectively connected to three mutual inductors, the three mutual inductors are respectively arranged on A, B, C three firing wires in the power line, the first current switch 3 and the second current switch 4 are respectively provided with three, and the first current switch 3, the second current switch 4 and the ampere meter I B With ammeter I C Is connected with the control mode and ammeter I A Similarly, the description is omitted. On this basis, three first current blades 32 are respectively connected to the junction box body 1 in a rotating manner, and are respectively connected to the first current blade handles 33 in a rotating manner, and three second current blades 42 are respectively connected to the junction box body 1 in a rotating manner, and are respectively connected to the second current blade handles 43 in a rotating manner.
With continued reference to fig. 1-4, in this embodiment, the voltmeter is also provided with three, U's respectively A 、U B 、U C One end of each of the three voltmeters is connected with each of A, B, C fire wires in the power line, and the other end of each of the three voltmeters is connected with a zero line N in the power line. The voltage switches 2 are provided with four, wherein three voltage switches 2 are respectively connected with three voltmeters, wherein the three voltmeters are connected with the voltmeter U B Voltmeter U C Connection and control mode of connected voltage switch 2 and voltmeter U A Similarly, the description is omitted. In addition, a further voltage switch 2 is arranged on the line connected to the neutral line N. On this basis, four voltage knife blades 22 are respectively connected to the junction box body 1 in a rotating manner and are respectively connected with a voltage knife handle 23 in a rotating manner.
With continued reference to fig. 1-3, the junction box further includes a first current-knife handle 33 connected to the first current-knife blade 32, the junction box further includes a second current-knife handle 43 connected to the second current-knife blade 42, and the junction box further includes a voltage-knife handle 23 connected to the voltage-knife blade 22. Alternatively, the first current-knife handle 33, the second current-knife handle 43, and the voltage-knife handle 23 are all made of an insulating material, such as plastic, rubber, etc., so as to prevent the operator from getting an electric shock hazard.
With continued reference to fig. 1-3, when the first current blade 32 is in the first current open position, the second current blade 42 is in the second current closed position, and the voltage blade 22 is in the voltage closed position, both the ammeter and the voltmeter operate normally, and the first limiting member can lock the relative positions among the first current blade 32, the second current blade 42, and the voltage blade 22. The ammeter and the voltmeter are in a normal running state, an operator cannot independently operate any knife switch piece, and damage or inaccurate metering of the ammeter or the voltmeter caused by false touch is prevented.
Specifically, the first limiting member is the first pin 5, when the first current blade 32 is located at the first current-opening position, the second current blade 42 is located at the second current-closing position, and the voltage blade 22 is located at the voltage-closing position, the first pin 5 can sequentially pass through the voltage-knife handle 23, the first current-knife handle 33, and the second current-knife handle 43. The voltage knife handle 23, the first current knife handle 33 and the second current knife handle 43 each have a first pin connection hole 51 for a plug-in fit with the first pin 5.
With continued reference to fig. 1-3, when the first current blade 32 is in the first current-closed position, the second current blade 42 is in the second current-open position, and the voltage blade 22 is in the voltage-open position, the ammeter and the voltmeter are disconnected from the power line and are in a detachable and replaceable state, and the second limiting member can lock the relative positions among the first current blade 32, the second current blade 42, and the voltage blade 22. The operation staff can not independently operate any knife blade when not completing the replacement operation, and the corresponding switch is closed or opened when not completing the replacement of the ammeter or the voltmeter, so that the ammeter or the voltmeter is prevented from being damaged.
Specifically, the second limiting member is a second pin, and when the first current blade 32 is located at the first current closing position, the second current blade 42 is located at the second current opening position, and the voltage blade 22 is located at the voltage opening position, the second pin can sequentially pass through the voltage blade handle 23, the first current blade handle 33, and the second current blade handle 43. The voltage knife handle 23, the first current knife handle 33 and the second current knife handle 43 are respectively provided with a second pin connecting hole 52 for being in plug-in fit with the second pin.
With continued reference to fig. 1-3, the first pin 5 is sized differently from the second pin, so that the first pin connection hole 51 for mating with the first pin 5 and the second pin connection hole 52 for mating with the second pin are sized differently, which can prevent an operator from misplacing the different connection holes when using the first pin 5 and the second pin.
With continued reference to fig. 1-3, identifiers are respectively provided on the voltage knife switch handle 23, the first current knife switch handle 33 and the second current knife switch handle 43 for identification, so as to remind operators of functions corresponding to different switches and reduce occurrence of error operation conditions.
With continued reference to fig. 1-3, during the replacement of the ammeter, the replacement of the voltmeter is relatively independent of the replacement of the ammeter, and optionally, in this embodiment, the first current switch 3 is disposed between the voltage switch 2 and the second current switch 4, so that an operator can sequentially operate the voltage switch 2, the first current switch 3 and the second current switch 4, and sequentially replace the voltmeter and the ammeter.
Fig. 5 shows a schematic structural diagram of a first current static contact, a second current static contact or a voltage static contact in an embodiment of the present invention; fig. 6 shows a schematic front view of a first current static contact, a second current static contact or a voltage static contact in an embodiment of the invention. Referring to fig. 1, 5 and 6, the voltage stationary contact 21 has a slot 6, and when the voltage blade 22 is in the closed position, it can be plugged into the slot 6 of the voltage stationary contact 21 and abut against the side wall 61 of the slot 6. Preferably, the slot 6 has two side walls 61, the two side walls 61 are parallel and spaced apart, and the width of the voltage blade 22 along the normal direction of the side walls 61 is equal to the spacing between the two side walls 61. It is further preferred that the slot 6 further has two guiding portions 62, the two guiding portions 62 are respectively connected to the two side walls 61, and a distance between the two guiding portions 62 near the opening of the slot 6 is larger than a distance near the bottom wall of the slot 6, so as to guide the electric pressing blade 22 into the slot 6. Optionally, the first current fixed contact 31 and the second current fixed contact 41 also adopt similar structures, which are not described herein.
The following describes in detail the replacement method of the voltmeter and the ammeter when the junction box in the present embodiment is used with reference to fig. 1 to 6.
When the voltmeter and the ammeter are both in normal operation, the voltage knife blade 22 is located at a voltage closing position, the first current knife blade 32 is located at a first current opening position, and the second current knife blade 42 is located at a second current closing position, and meanwhile, the first pin 5 sequentially passes through the voltage knife handle 23, the first current knife handle 33 and the second current knife handle 43.
When the maintenance personnel needs to replace the voltmeter, the first pin 5 is pulled out from the voltage knife handle 23 while the first pin 5 still passes through the first current knife handle 33 and the second current knife handle 43. At this time, an operator can control the voltage knife handle 23 and the voltage knife blade 22 independently, and the voltmeter is disconnected by adjusting the voltage knife blade 22 to a voltage disconnection position, and then the voltmeter is replaced. If the maintainer needs to replace the ammeter at the same time, the first pin 5 is continuously pulled out from the first current knife handle 33, or the first pin 5 is completely pulled out, the restriction on the relative displacement between the first current knife blade 32 and the second current knife blade 42 is released, and the maintainer only needs to adjust the first current knife blade 32 to the first current closing position, then adjust the second current knife blade 42 to the second current opening position in sequence, and replace the ammeter.
At this time, the voltage knife blade 22 is located at the voltage off position, the first current knife blade 32 is located at the first current on position, the second current knife blade 42 is located at the second current off position, and the second pin is sequentially passed through the voltage knife handle 23, the first current knife handle 33 and the second current knife handle 43 in order to prevent erroneous operation.
After the replacement of the voltmeter and the ammeter is completed, the second pin is pulled out of the second ammeter knife handle 43, the second ammeter knife blade 42 is adjusted to a second ammeter closed position, the ammeter is connected to the power line, then the second pin is pulled out of the first ammeter knife handle 33 or pulled out completely, the first ammeter knife blade 32 is operated to be located at the first ammeter open position, the voltage knife blade 22 is operated to be located at the voltage closed position, the voltmeter is connected to the power line, and the installation of the voltmeter and the ammeter is completed. Finally, the first pin 5 sequentially passes through the voltage switch handle 23, the first current switch handle 33 and the second current switch handle 43, so that the relative positions of the first pin and the second pin are kept fixed. Therefore, the voltmeter and the ammeter can be disassembled and replaced under the condition of no power failure, and the later maintenance is convenient.
Example two
The present embodiment provides a junction box which is substantially the same as that in the first embodiment except that: the relative positions between the voltage switch 2, the first current switch 3 and the second current switch 4 are different.
With continued reference to fig. 4, in the present embodiment, the second current switch 4 is located between the voltage switch 2 and the first current switch 3. Since the voltmeter is relatively independent from the ammeter, and the first current blade 32 must be adjusted and the second current blade 42 must be adjusted when replacing the ammeter, the operation sequence is not allowed to be wrong. By providing the second current switch 4 between the voltage switch 2 and the first current switch 3, when the replacement operation of the ammeter and the voltmeter is performed, the first pin 5 is first pulled out from the first current blade 33, and then the first current blade 32 is operated. At this time, the first pin 5 still penetrates through the second current blade 42 and the voltage blade 22, so as to limit the relative displacement between the second current blade 42 and the voltage blade 22, and prevent an operator from touching the second current blade 42 by mistake before completing the operation of the first current blade 32, so that the operation sequence is wrong, and further the ammeter or the transformer is damaged.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (8)
1. A junction box, comprising:
a junction box body (1);
the first current switch (3) comprises a first current knife blade (32) and a first current fixed contact (31) fixedly connected to the junction box body (1), the first current knife blade (32) is provided with a first current opening position and a first current closing position, and when the first current knife blade (32) is positioned at the first current closing position, the first current knife blade (32) is contacted with the first current fixed contact (31) for enabling an ammeter of the current transformer to be short-circuited; when the first current knife blade (32) is positioned at a first current breaking position, the first current knife blade (32) is separated from the first current static contact (31);
the second current switch (4) comprises a second current knife blade (42) and a second current fixed contact (41) fixedly connected to the junction box body (1), the second current knife blade (42) is provided with a second current opening position and a second current closing position, and when the second current knife blade (42) is positioned at the second current closing position, the second current knife blade (42) is contacted with the second current fixed contact (41) and is used for enabling the ammeter to be connected to a power line; when the second current knife blade (42) is positioned at a second current disconnection position, the second current knife blade (42) is separated from the second current static contact (41) and is used for disconnecting the ammeter from the power line;
the first limiting piece can lock the relative position between the first current knife blade (32) and the second current knife blade (42) when the first current knife blade (32) is positioned at a first current opening position and the second current knife blade (42) is positioned at a second current closing position;
the junction box further comprises a voltage switch (2), the voltage switch (2) comprises a voltage static contact (21) and a voltage knife blade (22) which are fixedly connected to the junction box body (1), the voltage knife blade (22) is provided with a voltage opening position and a voltage closing position, and when the voltage knife blade (22) is positioned at the voltage closing position, the voltage knife blade (22) is contacted with the voltage static contact (21) and is used for enabling a voltmeter of a voltage transformer to be connected to the power line; when the voltage knife blade (22) is positioned at a voltage disconnection position, the voltage knife blade (22) is separated from the voltage static contact (21) and is used for disconnecting the voltmeter from the power line;
when the first current knife blade (32) is located at a first current opening position, the second current knife blade (42) is located at a second current closing position, and the voltage knife blade (22) is located at a voltage closing position, the first limiting piece can lock the relative positions among the first current knife blade (32), the second current knife blade (42) and the voltage knife blade (22).
2. The junction box according to claim 1, further comprising a second stop capable of locking a relative position between the first current blade (32) and the second current blade (42) when the first current blade (32) is in a first current closed position and the second current blade (42) is in a second current open position.
3. The junction box according to claim 2, wherein the second stop is capable of locking the relative positions between the first current blade (32), the second current blade (42) and the voltage blade (22) when the first current blade (32) is in a first current closed position, the second current blade (42) is in a second current open position, and the voltage blade (22) is in a voltage open position.
4. A junction box according to claim 2 or 3, characterized in that the junction box further comprises a first current-knife handle (33) connected to the first current-knife blade (32), the junction box further comprises a second current-knife handle (43) connected to the second current-knife blade (42), the junction box further comprises a voltage-knife handle (23) connected to the voltage-knife blade (22); the first limiting piece is a first pin (5), when the first current knife blade (32) is located at a first current opening position, the second current knife blade (42) is located at a second current closing position, and when the voltage knife blade (22) is located at a voltage closing position, the first pin (5) can sequentially pass through the voltage knife handle (23), the first current knife handle (33) and the second current knife handle (43).
5. The junction box according to claim 4, wherein the second limiting member is a second pin, and the second pin can sequentially pass through the voltage knife handle (23), the first current knife handle (33) and the second current knife handle (43) when the first current knife blade (32) is located at a first current closed position, the second current knife blade (42) is located at a second current open position, and the voltage knife blade (22) is located at a voltage open position.
6. Junction box according to claim 5, characterized in that the first pin (5) is of a different size than the second pin.
7. The junction box according to claim 4, characterized in that identifiers are provided on the voltage knife handle (23), the first current knife handle (33) and the second current knife handle (43), respectively.
8. Junction box according to claim 1, characterized in that the first current switch (3) is located between the voltage switch (2) and the second current switch (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111489229.2A CN114141567B (en) | 2021-12-08 | 2021-12-08 | Junction box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111489229.2A CN114141567B (en) | 2021-12-08 | 2021-12-08 | Junction box |
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| CN114141567A CN114141567A (en) | 2022-03-04 |
| CN114141567B true CN114141567B (en) | 2023-06-23 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202616126U (en) * | 2012-05-31 | 2012-12-19 | 西安博隆电气有限责任公司 | Novel outdoor AC high-voltage isolation switch |
| CA2899978A1 (en) * | 2014-03-14 | 2014-10-02 | General Equipment And Manufacturing Company, Inc., D/B/A Topworx, Inc. | Quick disconnect connector assembly |
| CN209747434U (en) * | 2019-07-02 | 2019-12-06 | 广东电网有限责任公司 | Drop-out fuse with grounding hanging ring |
| CN111863498A (en) * | 2020-08-27 | 2020-10-30 | 国网浙江省电力有限公司检修分公司 | Fast switching operation mechanism |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015023685A (en) * | 2013-07-19 | 2015-02-02 | 株式会社日立製作所 | Switch gear |
-
2021
- 2021-12-08 CN CN202111489229.2A patent/CN114141567B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202616126U (en) * | 2012-05-31 | 2012-12-19 | 西安博隆电气有限责任公司 | Novel outdoor AC high-voltage isolation switch |
| CA2899978A1 (en) * | 2014-03-14 | 2014-10-02 | General Equipment And Manufacturing Company, Inc., D/B/A Topworx, Inc. | Quick disconnect connector assembly |
| CN209747434U (en) * | 2019-07-02 | 2019-12-06 | 广东电网有限责任公司 | Drop-out fuse with grounding hanging ring |
| CN111863498A (en) * | 2020-08-27 | 2020-10-30 | 国网浙江省电力有限公司检修分公司 | Fast switching operation mechanism |
Non-Patent Citations (1)
| Title |
|---|
| 利用电流分析可靠判断GIS设备刀闸位置方法研究;曾林;;电工技术(第01期);全文 * |
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