CN113484554B - Experimental terminal box of electric energy meter - Google Patents
Experimental terminal box of electric energy meter Download PDFInfo
- Publication number
- CN113484554B CN113484554B CN202110802278.0A CN202110802278A CN113484554B CN 113484554 B CN113484554 B CN 113484554B CN 202110802278 A CN202110802278 A CN 202110802278A CN 113484554 B CN113484554 B CN 113484554B
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- screw
- crimping
- conducting strip
- bottom plate
- hole
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Connection Or Junction Boxes (AREA)
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Abstract
The invention discloses an electric energy meter test junction box, which comprises a box body, wherein a crimping device is arranged in the box body, and the crimping device comprises: the compression joint frame comprises a bottom plate, a top plate and two side plates, the bottom plate is fixedly arranged on the inner bottom surface of the box body, and the top plate is provided with a screw hole; the conducting strip is movably arranged in the crimping frame and can move along the height direction of the two side plates; the compression joint screw penetrates through the screw hole, and the bottom of the compression joint screw can abut against the conductive sheet; the crimping screws can push the conducting strips to move downwards along the two side plates along with the rotation of the crimping screws on the screw holes, so that the conducting wires between the conducting strips and the bottom plate are crimped and fixed. The junction box can solve the problem that the lead is damaged or broken due to excessive force in the process of screwing the screw of the junction box, and also can solve the problem that the screw falls off due to loosening of the screw.
Description
Technical Field
The invention relates to an electric energy meter test junction box, and belongs to the technical field of junction terminal boxes.
Background
In the electric energy metering management work, the electric energy meter test junction box is an important component of a secondary circuit of an electric energy metering device, and the electric energy meter can be connected into the secondary circuit in operation by using the junction box, so that the electric energy meter can be charged and measured for completing the error and the wiring condition of the metering device, the electric energy meter can be replaced with a load, and the like, but in the current practical application of the test junction box, the following problems are found to exist:
(1) Because the terminal box is connected with the wire and is realized by adopting a screw crimping fastening mode, when the fastening screw is used for too much force (currently, in order to increase the working efficiency, an electrodynamic screwdriver is mostly adopted for screwing the screw, the force is not well mastered), the wire is inevitably damaged or even broken, the service life of the wire is influenced, and the wire is broken to cause open circuit of current and voltage, so that the metering failure is caused, the electric quantity is less metered, or the equipment and personal safety are threatened.
(2) When loosening the screw for crimping the lead, the screw can often be withdrawn from the screw rod too much to cause the screw to fall off, which brings inconvenience to the field work and increases the working time for finding the fallen screw.
Disclosure of Invention
Based on the above, the invention provides the junction box for the electric energy meter test, so as to overcome the defects of the prior art.
The technical scheme of the invention is as follows: the utility model provides an experimental terminal box of electric energy meter, includes the box body be equipped with the crimping device in the box body, the crimping device includes:
the compression joint frame comprises a bottom plate, a top plate and two side plates, the bottom plate is fixedly arranged on the inner bottom surface of the box body, and the top plate is provided with a screw hole;
the conducting strip is movably arranged in the crimping frame and can move along the height direction of the two side plates;
the compression joint screw penetrates through the screw hole, and the bottom of the compression joint screw can abut against the conductive sheet;
the crimping screws can push the conducting strips to move downwards along the two side plates along with the rotation of the crimping screws on the screw holes, so that the conducting strips between the conducting strips and the bottom plate are crimped and fixed.
In one example, the bottom plate is provided with wire grooves for placing wires connected with the conducting strips.
In one example, the wire guide grooves are semicircular grooves and are formed on the base plate in an S shape.
In one example, the wire guide grooves are provided with protruding points at intervals along the extending direction of the wire guide grooves.
In one example, two sides of the conductive sheet are provided with limiting clamps, and the distance between two adjacent limiting clamps on each side is matched with the width of the two side plates so as to limit the conductive sheet from falling out of the crimping frame from the horizontal direction.
In one example, the lower bottom surface of the conductive plate is a toothed plane, and the direction of the teeth arranged on the toothed plane is perpendicular to the length direction of the bottom plate.
In one example, an insulating pad is disposed at the bottom of the crimping screw.
In one example, a drill hole is formed at the bottom of the compression screw, a compression spring is arranged in the drill hole, one end of the compression spring is connected with the compression screw, and the other end of the compression spring is connected with the insulating pad.
In one example, a transparent insulating plate is arranged on the box body, a through hole is formed in the transparent insulating plate, and the compression screw penetrates through the through hole and then is matched with the screw hole in the top plate.
The beneficial effects of the invention are: the junction box can solve the problems that the loss of current and loss of voltage measurement is less, and further equipment and personal safety are threatened, because a lead is damaged or broken due to excessive force in the process of screwing the screw of the junction box, a secondary circuit is opened and the loss of current and loss of voltage measurement is less; the problem that the screw falls due to loosening of the screw and working time is prolonged can be solved, personal safety of equipment is improved, economic loss of electric quantity is reduced, and good effects can be achieved by increasing working efficiency and the like.
Drawings
FIG. 1 is a schematic view of a crimping apparatus;
FIG. 2 is a bottom cross-sectional view of a crimp screw;
FIG. 3 is a schematic structural diagram of a conductive sheet;
description of reference numerals:
1, crimping a frame;
11 bottom plate, 12 top plate, 13 side plate, 14 wire groove;
2, conducting strips;
21, a limit card;
3, pressing a screw;
31 insulating pad, 32 drilled hole, 33 compression spring;
4 a transparent insulating plate.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Referring to fig. 1 to 3, a junction box for testing an electric energy meter according to an embodiment of the present invention includes a box body, and a wire hole is formed in a side surface of the box body, through which a wire can be inserted into or extracted from the box body. The terminal box is a common knowledge in the field of electric power and will not be described in detail.
A crimping device is arranged in the box body and comprises a crimping frame 1, a conducting strip 2 and a crimping screw 3, the crimping frame 1 comprises a bottom plate 11, a top plate 12 and two side plates 13, the bottom plate 11 is fixedly arranged on the inner bottom surface of the box body, and the top plate 12 is provided with a screw hole; the conducting plate 2 is movably arranged in the crimping frame 1, and the conducting plate 2 can move along the height direction of the two side plates 13; the crimping screw 3 can be arranged in the screw hole in a penetrating mode, the bottom of the crimping screw 3 can abut against the conducting plate 2, and the conducting plate 2 is compressed or loosened. When the device works, the crimping screw 3 can push the conducting strip 2 to move downwards along the two side plates 13 along with the rotation of the crimping screw 3 on the screw hole, so that a wire between the conducting strip 2 and the bottom plate 11 is crimped and fixed. In this embodiment, the conductive sheet 2 may be a copper sheet.
From P = F/S (pressure = pressure/force-receiving area), it is known that the pressure and the force-receiving area must be increased simultaneously to ensure the pressure is constant. The problem of increasing pressure can be solved by fastening the screw with force, but the problem of increasing the stress area is solved by adopting 2.5 for the relative fixation of the metering secondary loop lead mm2 Or 4.0 mm2 The invention relates to a copper wire, which is carried out from the direction of a fastener and mainly designed as follows: 1. the conductive copper bar of the junction box for the electric energy meter test is changed into a conductive sheet 2 and is placed in the crimping frame 1 for entering and exiting the lead to carry out a voltage and current conductive channel. 2. The conducting strip 2 is sleeved into the crimping frame 1 with openings at two sides, and the front surface of the crimping frame 1 is perforated for fastening screws.
The junction box can solve the problems that the loss of current and loss of voltage measurement is less, and further equipment and personal safety are threatened, because a lead is damaged or broken due to excessive force in the process of screwing the screw of the junction box, a secondary circuit is opened and the loss of current and loss of voltage measurement is less; the problem of increase operating time because of not hard up screw leads to the screw to drop can also be solved, to improve equipment personal safety, reduce electric quantity economic loss, increase work efficiency etc. and can both play fine effect.
In the junction box, the bottom plate 11 is provided with the wire groove 14, the wire groove 14 is used for placing the wire connected with the conducting plate 2, and the structure can realize the fixation of the wire position.
In the junction box, the wire groove 14 is a semicircular groove and is formed on the bottom plate 11 in an S shape, and the structure can prevent the wire from being separated from the wire groove 14 and improve the fixing effect.
In the terminal box, the wire groove 14 is provided with the protruding points at intervals along the extending direction, and the fixing effect of the wires in the wire groove 14 can be further improved by the protruding points.
In this terminal box, conducting strip 2 both sides are equipped with spacing card 21, and the distance between every adjacent two spacing cards 21 of side matches with the width of both sides board 13 to restriction conducting strip 2 is deviate from crimping frame 1 by the horizontal direction, can guarantee that conducting strip 2 can only screw up and unscrew the direction activity through fastening crimping screw 3, thereby reaches the purpose of fastening the wire.
In the junction box, the lower bottom surface of the conducting plate 2 is a tooth-shaped plane, and the direction of the teeth arranged on the tooth-shaped plane is vertical to the length direction of the bottom plate 11.
In this terminal box, be equipped with insulating pad 31 in the bottom of crimping screw 3, can avoid on the conducting strip 2 conductance to crimping screw 3 like this, realize safe operation.
In the junction box, a drilling hole 32 is formed in the bottom of the compression screw 3, a compression spring 33 is arranged in the drilling hole 32, one end of the compression spring 33 is connected with the compression screw 3, the other end of the compression spring 33 is connected with the insulating pad 31, and the compression spring 33 can push the insulating pad 31 out of the drilling hole 32 in a natural state. The advantage of this kind of structure lies in, after crimping screw 3 compressed tightly conducting strip 2, compression spring 33 is in compression state in drilling 32 to it can give insulating pad 31 certain pressure, thereby makes insulating pad 31 can elastic support and lean on conducting strip 2, avoids because of the emergence of the power failure condition that crimping screw 3 is not hard up and cause.
In the junction box, the box body is provided with the transparent insulating plate 4, the transparent insulating plate 4 is provided with a through hole, and the crimping screw 3 is matched with the screw hole on the top plate 12 after penetrating through the through hole. The advantage of this kind of structure lies in, transparent insulation board 4 also can guarantee certain operation convenience when can avoiding the mistake to electrocute.
In the embodiment of the invention, in the aspect of the design of crimping the lead screw, a cross nut (crimping screw 3) is embedded under a transparent insulating plate 4 and is fixed in a circular movable range, and a screw rod is in direct contact with a conducting strip 2 through a screw hole on a top plate 12, so that the crimping screw 3 can be fixed, the crimping frame 1 can be controlled to crimp the lead, and the purposes of increasing the contact area of the lead and a fastener and preventing the crimping screw 3 from falling off due to withdrawing of the screw rod are achieved.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (2)
1. The utility model provides an experimental terminal box of electric energy meter, includes the box body, its characterized in that be equipped with the crimping device in the box body, the crimping device includes:
the crimping frame (1) comprises a bottom plate (11), a top plate (12) and two side plates (13), the bottom plate (11) is fixedly arranged on the inner bottom surface of the box body, and the top plate (12) is provided with a screw hole;
the conducting strip (2) is movably arranged in the crimping frame (1), and the conducting strip (2) can move along the height direction of the two side plates (13);
the compression joint screw (3) penetrates through the screw hole, and the bottom of the compression joint screw (3) can abut against the conducting strip (2);
the bottom plate (11) is provided with a wire groove (14), and the wire groove (14) is used for placing a wire connected with the conducting strip (2); the wire groove (14) is a semicircular groove and is formed on the bottom plate (11) in an S shape; the wire groove (14) is provided with protruding points at intervals along the extending direction; limiting clamps (21) are arranged on two sides of the conducting strip (2), the distance between every two adjacent limiting clamps (21) on each side is matched with the width of the two side plates (13), and therefore the conducting strip (2) is limited to be separated from the crimping frame (1) in the horizontal direction; the lower bottom surface of the conducting strip (2) is a tooth-shaped plane, and the direction of the teeth arranged on the tooth-shaped plane is vertical to the length direction of the bottom plate (11); an insulating pad (31) is arranged at the bottom of the compression joint screw (3); a drilling hole (32) is formed in the bottom of the compression joint screw (3), a compression spring (33) is arranged in the drilling hole (32), one end of the compression spring (33) is connected with the compression joint screw (3), and the other end of the compression spring is connected with the insulating pad (31);
with the rotation of the crimping screw (3) on the screw hole, the crimping screw (3) can push the conducting strip (2) to move downwards along the two side plates (13), so that a wire between the conducting strip (2) and the bottom plate (11) is crimped and fixed.
2. The junction box for the electric energy meter test according to claim 1, wherein a transparent insulating plate (4) is arranged on the box body, a through hole is formed in the transparent insulating plate (4), and the crimping screw (3) is matched with the screw hole in the top plate (12) after penetrating through the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110802278.0A CN113484554B (en) | 2021-07-15 | 2021-07-15 | Experimental terminal box of electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110802278.0A CN113484554B (en) | 2021-07-15 | 2021-07-15 | Experimental terminal box of electric energy meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113484554A CN113484554A (en) | 2021-10-08 |
| CN113484554B true CN113484554B (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110802278.0A Active CN113484554B (en) | 2021-07-15 | 2021-07-15 | Experimental terminal box of electric energy meter |
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| CN (1) | CN113484554B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115585184A (en) * | 2022-11-03 | 2023-01-10 | 贵州电网有限责任公司 | Early warning screw for displaying thermal defects of power grid line |
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| CN113484554A (en) | 2021-10-08 |
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