CN112858746B - Electric energy meter on-site verification special power strip and use method - Google Patents

Abstract

The invention discloses a special power strip for electric energy meter on-site verification and a use method thereof, comprising a shell, a front connecting column and a rear binding post, wherein the middle part of a clamping plate is fixed on the shell through a hinge joint; two ends of the swinging plate are connected with swinging arms of the two clamping plates; the first spring is connected with the swinging plate and applies forward elastic force to the swinging plate; the movable switch is arranged on the shell and is connected with the swinging plate. The special power strip for electric energy meter field verification can be suitable for a special wiring bottom plate, and the special power strip can be installed in the special wiring bottom plate, so that the normal function of the special wiring bottom plate is not affected and destroyed, and the electric energy meter field verification work can be completed.

Description

Electric energy meter on-site verification special power strip and use method

Technical Field

The invention relates to the technical field of electric energy meter detection, in particular to a special power strip for electric energy meter on-site verification and a use method.

Background

In recent years, the service quality of electric power is improved to be further optimized, the problems of power failure disturbing people, influence on residential electricity experience and the like caused by replacement of the electric energy meter are reduced by the operation mode of uninterrupted power meter replacement, the power supply reliability is further improved, the uninterrupted power meter replacement is realized, a special wiring bottom plate is additionally arranged in a single-phase electric energy metering box, the uninterrupted power meter replacement is ensured, and the on-site verification work of the single-phase electric energy meter is greatly influenced due to the additionally arranged special wiring bottom plate. Because the structural design of the special wiring bottom plate shields the strong current terminal of the electric energy meter, the traditional field verification wiring mode cannot be used, so that the field verification work cannot be performed, the field verification business of the electric energy meter cannot be normally performed, the electric energy meter needs to be detached and transferred to laboratory verification, the working efficiency of the field verification is greatly reduced, the verification cost of the electric energy meter is improved, the field verification process time of the electric energy meter is greatly increased, and the problem of how to complete the field verification work of the electric energy meter is solved.

Disclosure of Invention

Aiming at the prior art, the invention aims to provide a special power strip for on-site verification of an electric energy meter and a use method thereof.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides a row is inserted in special use of electric energy meter on-the-spot examination, includes the casing, the front end of casing is equipped with the connecting hole, and the rear end is equipped with the wiring hole, still includes: the front connecting post is connected with the rear binding post, one end of the front connecting post is positioned in the shell, and the other end of the front connecting post extends out of the shell through the connecting hole; one end of the rear binding post is positioned in the shell, and the other end of the rear binding post penetrates out of the shell through the wiring hole; the clamping plates are positioned in the shell, the middle parts of the clamping plates are fixed on the shell through hinge points, one ends of the clamping plates extend forwards to form hook stopping arms, hooks are arranged at the tail ends of the hook arms, the hook ends extend out of the shell, the other ends of the clamping plates extend inwards to form swinging arms, and the swinging arms and the hook arms are L-shaped; the swinging plate is positioned in the shell, and two ends of the swinging plate are connected with swinging arms of the two clamping plates; the first spring is connected with the swinging plate and applies forward elastic force to the swinging plate; the movable switch is arranged on the shell and is connected with the swing plate; the movable switch moves back and forth to drive the swinging plate to move back and forth, and the swinging plate drives the hook arm to swing left and right around the hinging point.

Optionally, the shell comprises an upper cover and a lower cover which are mutually buckled and connected together.

Optionally, a fixed conductor is arranged in the shell, and the front connecting post and the rear binding post are respectively connected with the fixed conductor.

Optionally, the method further comprises:

the insulation sleeve is sleeved on the front connecting column, a first baffle is arranged at one end of the insulation sleeve, which is positioned in the shell, and the outer edge of the first baffle is larger than the connecting hole;

and the second spring is connected with the first baffle plate and applies forward elastic force to the first baffle plate.

Optionally, the rear binding post is connected with the front connecting post through a wire, the rear binding post is fixed on the fixed sliding plate, the fixed sliding plate is connected with a third spring, the third spring and the fixed sliding plate exert forward elastic force, the left side and the right side of the front end of the fixed sliding plate are provided with limiting plates, the limiting plates are connected with a fourth spring, and the fourth spring exerts inward elastic force on the limiting plates; the swing plate is connected with the limit plate through a pushing structure; when the swinging plate moves downwards, the limiting plate is driven to move outwards through the pushing structure, so that the limiting plate releases the limit on the fixed sliding plate, and the fixed sliding plate moves inwards under the action of the third spring until the rear binding post contracts into the shell.

Optionally, the pushing structure is: the contact surface of the swing plate and/or the limiting plate is an inclined surface.

Optionally, a first sliding hole is formed in the fixed sliding plate, a second sliding hole is formed in the fixed sliding plate, and the movable switch penetrates through the first sliding hole and the second sliding hole.

Optionally, in the initial state, the front edge of the first sliding hole is far away from the front edge of the movable switch.

Optionally, the front connecting column is mounted on the sliding sleeve, and a fifth spring is further arranged on the front connecting column and applies forward elastic force to the front connecting column.

The application method of the special power strip for the on-site verification of the electric energy meter comprises the following steps:

step (1): in the initial state, the swing plate is at the front end under the action of the first spring, the hook is in the open state, the limiting plate is at the inner end under the action of the fourth spring, and the fixed sliding plate is abutted against the limiting plate under the action of the third spring; the rear binding post on the fixed slide plate extends out of the shell; the front edge of the first sliding hole is far away from the front edge of the movable switch;

step (2): when the hooks are connected to the special wiring bottom plate, the hooks are stressed to be folded inwards to drive the swinging plate to move downwards, and the swinging plate pushes the limiting plate to move outwards until the limiting of the fixed sliding plate is directly released;

step (3): the hook returns to an open state under the action of a first spring connected with the swinging plate after passing through the maximum folding position, and the hook is buckled on the special wiring bottom plate; simultaneously, as the limiting piece releases the limit, the fixed sliding plate moves forwards to the maximum position under the action of the third spring, and the rear binding post moves upwards along with the fixed sliding plate until the rear binding post contracts into the shell, so that the metal part of the rear binding post is not leaked out;

at the moment, the rear edge of the movable switch is propped against the rear edge of the second sliding hole, and the rear edge of the first sliding hole is positioned at the rear end of the rear edge of the second sliding hole;

step (4): when the special power strip is checked, the movable switch is shifted backwards, and as the rear edge of the first sliding hole is positioned at the rear end of the rear edge of the second sliding hole, the movable switch only drives the fixed sliding plate to move backwards until the rear edge of the movable switch abuts against the rear edge of the first sliding hole, and the rear binding post stretches out;

step (5): the movable switch continues to dial backwards, and simultaneously drives the fixed sliding plate and the swinging plate to move backwards, and the swinging plate drives the hooks to fold inwards, so that the special power strip can be taken down from the special wiring bottom plate;

step (6): the movable switch is loosened, the first spring drives the swinging plate to move forwards, the swinging plate drives the hook to open, and the swing plate returns to an initial state; meanwhile, the swing plate drives the movable switch to move forwards, and the movable switch drives the fixed slide plate to move forwards; in the forward moving process, the limiting plate moves inwards under the action of the fourth spring until the fixed sliding plate is limited, and the fixed sliding plate is restored to the initial state.

The beneficial effects of the invention are as follows:

(1) The front connecting column in the shell can be directly inserted into the special wiring bottom plate of the electric energy meter, and the wiring terminal of the field calibrator can be directly connected into the rear wiring terminal, so that the field calibrator is indirectly connected with the strong electric terminal shielded by the special wiring bottom plate, and the electric energy meter is simple to operate, simple in structure, easy to store and good in safety;

(2) According to the invention, the insulating sleeve and the second spring can correspondingly shrink and reset when the special power strip is installed and disassembled, so that the structure is simple, and the safety is good;

(3) The invention is provided with a movable switch, a limiting plate and an L-shaped clamping plate, wherein the upper cover is provided with a guide through hole and a movable hole, the limiting plate is movably arranged on the upper cover and can be directly connected with a special wiring bottom plate, or the movable switch can indirectly control the opening and closing of a hook on the clamping plate, the hook is clamped on the special wiring bottom plate to ensure the stable connection of the special power strip, and meanwhile, the invention is convenient to assemble and disassemble, small in resistance and light in structure;

(4) The invention realizes that the rear binding post can be automatically contracted into the shell when the hook is connected with the special wiring bottom plate through the matching of the fixed sliding plate, the limiting plate and the swinging plate, and simultaneously, the rear binding post is reset through the movable switch. The structure can avoid the metal leakage of the rear binding post, and the use safety is ensured to the greatest extent.

The special power strip for electric energy meter field verification can be suitable for a special wiring bottom plate, and the special power strip can be installed in the special wiring bottom plate, so that the normal function of the special wiring bottom plate is not affected and destroyed, and the electric energy meter field verification work can be completed.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a diagram of a terminal block of an electrical energy meter;

FIG. 2 is a top view of the present invention;

FIG. 3 is a front view of the present invention;

FIG. 4 is a cross-sectional view of the present invention;

FIG. 5 is a schematic perspective view of the present invention;

FIG. 6 is a top view of the lower cover;

fig. 7 is a front view of the lower cover;

FIG. 8 is a top view of the limiting plate;

FIG. 9 is a schematic structural view of a card;

FIG. 10 is a schematic structural view of a card;

FIG. 11 is a rear view of the present invention;

fig. 12 is a schematic diagram of a power strip structure dedicated for field detection of an electric energy meter according to another example of the present invention;

FIG. 13 is a schematic view of the structure at A-A in FIG. 12;

FIG. 14 is a schematic view of the structure at B-B in FIG. 12;

FIG. 15 is a schematic side elevational view of the FIG. 12;

FIG. 16 is a schematic diagram illustrating an exemplary embodiment of the present invention;

FIG. 17 is a schematic diagram illustrating an exemplary state two configuration of the present invention;

FIG. 18 is a schematic diagram of an exemplary state three configuration of the present invention;

FIG. 19 is a schematic diagram of an exemplary state four configuration of the present invention;

fig. 20 is a schematic diagram of an exemplary state five configuration of the present invention.

Reference numerals illustrate:

a housing 1; an upper cover 1-1; a lower cover 1-2; 1-3 of connecting holes; wiring holes 1-4; 1-5 of movable holes; 1-6 parts of mounting grooves; clamping grooves 1-7; 1-8 of a clamping hook; first pins 1-9; a front connecting column 2; a second baffle 2-1; a rear binding post 3; a clamping plate 4; a fixing pin 4-1; a fixing pin hole 4-2; a hook arm 4-3; 4-4 parts of hooks; swing arms 4-5; a second pin hole 4-6; a swinging plate 5; inclined plane 5-1; a first slide hole 5-2; 5-3 of a limit notch; 5-4 of limit strips; 5-5 of pulling holes; second pin 5-6; a first spring 6; a movable switch 7; a switch cap 8; a groove 9; a fixed conductor 10; a first threaded hole 10-1; a second threaded hole 10-2; an insulating sleeve 11; a first baffle 11-1; a second spring 12; a wire 13; a stationary slide 14; a second slide hole 14-1; a fixed block 14-2; a third spring 15; a limiting plate 16; a fourth spring 17; a guide slot cover 18; a sliding sleeve 19; and a fifth spring 20.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

As shown in fig. 2-11, the special power strip for on-site verification of the electric energy meter comprises a shell 1, wherein a front connecting column 2, a rear binding post 3, two clamping plates 4 and a swinging plate 5 are arranged in the shell 1. The front end of the shell 1 is provided with a connecting hole 1-3 and a movable hole 1-5, and the rear end is provided with a wiring hole 1-4.

The front connecting column 2 is connected with the rear binding post 3, one end of the front connecting column 2 is positioned in the shell 1, and the other end extends out of the shell 1 through the connecting hole 1-3; one end of the rear binding post 3 is positioned in the shell 1, and the other end of the rear binding post passes through the shell 1 through the wiring holes 1-4. In order to meet the wiring principle of field verification work and the structure is compatible with a special wiring bottom plate, the number of the front connecting posts 2 and the rear wiring posts 3 is 4, and the front connecting posts and the rear wiring posts correspond to each other one by one.

Two clamping plates 4 are positioned in the shell 1, the middle parts of the clamping plates 4 are arranged on the shell 1 through fixing pins 4-1, and the clamping plates 4 can rotate through the fixing pins 4-1. One end of the clamping plate 4 extends forwards to form a hook stopping arm 4-3, the tail end of the hook arm 4-3 is provided with a hook 4-4, the hook 4-4 extends out of the shell 1 through a movable hole 1-5, the other end of the clamping plate 4 extends inwards to form a swinging arm 4-5, and the swinging arm 4-5 and the hook arm 4-3 are L-shaped. The special power strip for electric energy meter on-site verification adopts the structural design of the cantilever type control button, and has the characteristics of light structure, small resistance and flexible control.

The swing plate 5 is positioned in the shell 1, a plurality of limit gaps 5-3 are formed in the swing plate 5, the swing plate 5 is arranged on the inner side of the upper cover 1-1 through 2 limit strips 5-4, the fixed positions of the limit strips 5-4 penetrate through the limit gaps 5-3, the swing plate 5 can slide along the direction of the limit gaps 5-3, the limit gaps 5-3 limit the maximum sliding range of the swing plate 5, and the stability of the sliding process of the swing plate is ensured. The two ends of the swinging plate 5 are connected with the swinging arms 4-5 of the two clamping plates 4 through second pins 5-6. The first spring 6 is connected with the limiting plate 16 and applies forward elastic force to the swinging plate 5, one end of the specific first spring 6 is connected to the pulling hole 5-5 on the limiting plate 16, the other end of the specific first spring is connected to the first pin 1-9, and the first pin 1-9 is arranged on the shell 1. The movable switch 7 is arranged on the shell 1, and the movable switch 7 is connected with the swinging plate 5; the movable switch 7 moves forwards and backwards to drive the swinging plate 5 to move forwards and backwards, and the swinging plate 5 drives the hook arm 4-3 to swing left and right around the hinging point. When the two hook arms 4-3 swing inwards, the two hooks 4-4 are folded, the device can be inserted into or pulled out of the special wiring bottom plate, and when the two hook arms 4-3 swing outwards, the two hooks 4-4 are opened relatively, and the device is clamped on the special wiring bottom plate. Under the action of the first spring 6, the hook 4-4 is in an expanded state in a normal state. The movable switch 7 is also provided with a switch cap 8, and the switch cap 8 is positioned at the outer side of the shell 1.

As an example, the housing 1 includes an upper cover 1-1 and a lower cover 1-2 that are snap-coupled to each other. Specifically, a plurality of clamping grooves 1-7 are formed in the upper cover 1-1, hooks 1-8 corresponding to the clamping grooves 1-7 are arranged on the lower cover 1-2, and the upper cover 1-1 is connected with the lower cover 1-2 through the matched connection of the clamping grooves 1-7 and the hooks 1-8. The cross section of the contact surface of the upper cover 1-1 and the lower cover 1-2 is in a ladder shape, and the installation is simple and convenient and the structure is stable. The upper cover and the lower cover 1-2 of the power strip special for the electric energy meter on-site verification adopt a full-buckle type mounting mode, any metal screw product is not used on the product shell, and the safety of the product in the use process is ensured.

As an example, the upper cover 1-1 is symmetrically provided with grooves 9 for easy holding.

The present application gives two examples of connection of the front post 2 and the rear post 3, one being "hard-wired" and the other being "soft-wired". As shown in fig. 2-5, the "hard-wired" structure is: the shell 1 is internally provided with a mounting groove 1-6, and a fixed conductor 10 is fixed in the mounting groove 1-6. The fixed conductor 10 is coaxially provided with a first threaded hole 10-1 and a second threaded hole 10-2 which are communicated, the inner end of the front connecting column 2 is screwed into the first threaded hole 10-1, and the rear binding post 3 is screwed into the second threaded hole 10-2. The second screw hole 10-2 is coaxially provided with the wiring hole 1-4.

In the structure, one end of the front connecting column 2, which is positioned outside the shell 1, is sleeved with the insulating sleeve 11, one end of the insulating sleeve 11 penetrates through the connecting hole 1-3, the end of the insulating sleeve 11 is fixedly provided with the first baffle 11-1, and the diameter of the outer edge of the first baffle 11-1 is larger than that of the connecting hole 1-3. The rear end of the front connecting column 2 is also provided with a second baffle plate 2-1, and the front connecting column 2 is sleeved with a second spring 12 positioned between the first baffle plate 11-1 and the second baffle plate 2-1. When the special power strip is installed, the insulating sleeve 11 is pressed by the resistance of the corresponding jack of the special wiring bottom plate, the second spring 12 is compressed, so that the insulating sleeve 11 is contracted backwards, and the end part of the front connecting column 2 is exposed; when the special power strip is disassembled, the insulating sleeve 11 stretches out forwards under the action of the second spring 12, so that reset is realized, the structure is simple, and the safety is good.

As shown in fig. 12-15, the "soft connect" structure is: the rear binding post 3 and the front connecting post 2 are connected through a wire 13. The rear terminal 3 is fixed to the fixed slide plate 14 by the fixed block 14-2, the fixed slide plate 14 is connected to the third spring 15, and the third spring 15 applies a forward elastic force to the fixed slide plate 14. Guide groove sleeves 18 are arranged on two sides of the fixed slide plate 14, guide grooves are arranged in the guide groove sleeves 18, and the fixed slide plate 14 slides back and forth in the guide grooves. Limiting plates 16 are arranged on the left side and the right side of the front end of the fixed sliding plate 14, the limiting plates 16 are connected with fourth springs 17, and the fourth springs 17 apply inward elastic force to the limiting plates 16. The swinging plate 5 is connected with the limiting plate 16 through a pushing structure; when the swing plate 5 moves downwards, the limiting plate 16 is driven to move outwards by the pushing structure, so that the limiting plate 16 releases the limit on the fixed slide plate 14.

As a specific example, the pushing structure is that the contact surface of the swing plate 5 and/or the limit plate 16 is an inclined surface 5-1.

Specifically, the swing plate 5 is provided with a fixed slide plate 14 provided with a first slide hole 5-2, the fixed slide plate 14 is provided with a second slide hole 14-1, and the movable switch 7 passes through the first slide hole 5-2 and the second slide hole 14-1.

As a specific example, the front connecting post 2 is mounted on the sliding sleeve 19, and a fifth spring 20 is further provided on the front connecting post 2, and the fifth spring 20 applies a forward elastic force to the front connecting post 2. Thus, when the front connection post 2 contacts the electrode, the front connection post 2 can slide due to the difference in mounting of the electrode, and the fifth spring 20 is mounted to maintain a constant pushing force so that the front connection post 2 is sufficiently contacted with the electrode.

The working process is as follows:

as shown in fig. 16, step (1): in the initial state, the swing plate 5 is at the front end under the action of the first spring 6, the hooks 4-4 are in an open state, the limiting plate 16 is at the inner end under the action of the fourth spring 17, and the fixed sliding plate 14 is abutted against the limiting plate 16 under the action of the third spring 15; the rear binding post 3 on the fixed slide plate 14 extends out of the shell 1;

after this step, the field tester is also connected to the rear terminal 3.

As shown in fig. 17, step (2): when the hooks 4-4 are connected to the special wiring bottom plate, the hooks 4-4 are forced to be folded inwards to drive the swinging plate 5 to move downwards, and the swinging plate 5 pushes the limiting plate 16 to move outwards until the limiting of the fixed sliding plate 14 is directly released;

as shown in fig. 18, step (3): the hooks 4-4 return to an open state under the action of the first springs 6 connected with the swinging plates 5 after passing through the maximum folding position, and the hooks 4-4 are buckled on the special wiring bottom plate; meanwhile, as the limiting piece releases the limit, the fixed sliding plate 14 moves forwards to the maximum position under the action of the third spring 15, and the rear binding post 3 moves upwards along with the fixed sliding plate 14 until the rear binding post is contracted into the shell 1, so that the metal part of the rear binding post 3 is not leaked.

At this time, the rear edge of the movable switch 7 abuts against the rear edge of the second sliding hole 14-1, the rear edge of the first sliding hole 5-2 is located at the rear end of the rear edge of the second sliding hole 14-1, and the movable switch 7 can abut against the front edge of the first sliding hole 5-2 for positioning.

After this step, an on-site verification operation may be performed. And (4) when the special power strip is checked and taken down, performing the steps (4) - (6).

As shown in fig. 19, step (4): when the special power strip is taken down after verification, the movable switch 7 is shifted backwards, and as the rear edge of the first sliding hole 5-2 is positioned at the rear end of the rear edge of the second sliding hole 14-1, the movable switch 7 only drives the fixed sliding plate 14 to move backwards until the rear edge of the movable switch 7 abuts against the rear edge of the first sliding hole 5-2, and the rear binding post 3 stretches out.

As shown in fig. 20, step (5): the movable switch 7 continues to be poked backwards, the movable switch 7 drives the fixed slide plate 14 and the swinging plate 5 to move backwards at the same time, and the swinging plate 5 drives the hooks 4-4 to be folded inwards, so that the special socket can be taken down from the special wiring bottom plate.

Step (6): the movable switch 7 is loosened, the first spring 6 drives the swinging plate 5 to move forwards, and the swinging plate 5 drives the hooks 4-4 to open and return to an initial state; meanwhile, the swing plate 5 drives the movable switch 7 to move forwards, and the movable switch 7 drives the fixed slide plate 14 to move forwards; in the forward movement, the limiting plate 16 moves inward under the action of the fourth spring 17 until limiting the fixed slide plate 14, and returns to the original state.

The technical principle of the special power strip for the on-site verification of the electric energy meter is as follows:

the wiring of the single-phase electric energy meter terminal is shown in fig. 1, phase line current enters from the No. 1 electric energy meter terminal, goes out from the No. 2 terminal, and zero line enters from the No. 3 electric energy meter terminal and goes out from the No. 4 terminal. The connector of the special wiring bottom plate is provided with pin guide holes for fixing, namely, the terminals 1-4 are provided with the pin guide holes, which lays a foundation for the development of the special power strip for on-site verification.

The front end of the main structure of the special power strip is directly connected with 4 wiring terminals of the electric energy meter through a special wiring bottom plate, the connecting posts of four terminals of 1, 2, 3 and 4 in the interior adopt independent conductor channels, and the rear end of the main structure of the special power strip is connected with the wiring terminals of the field calibrator by adopting 4 apertures or rear wiring terminals, which is equivalent to forming a complete power-on channel between the field calibrator and the electric energy meter, thereby being capable of completing the field calibration work of the electric energy meter together with the field calibrator and the special wiring bottom plate.

The plug board main body special for on-site verification is a four-way connecting channel with connectors, and is provided with a locking mechanism and a screw or a rear binding post 3 matched with a connecting column of a calibrator.

The on-site verification process comprises the following steps: (1) opening the seal, opening the transparent cover cap of the electric energy meter and opening the electricity larceny prevention cover plate; (2) inserting a special power strip for on-site verification, confirming reliable connection, screwing an electricity taking connecting column of an on-site verification instrument into a power strip screw socket or connecting the electricity taking connecting column to a rear binding post 3, and completing electricity taking; (3) opening a calibrator to perform field calibration; (4) and (3) finishing the verification, closing the calibrator, disconnecting, and pulling out the special electric strip for on-site verification and recovering.

The plug board main body special for on-site verification is made of ABS insulation (acrylonitrile/butadiene/styrene copolymer board) and flame retardance, and is formed by high-temperature high-pressure pressing, and the color is primary color. The mechanical properties of the host material are shown in Table 3-1. The electrical properties of the material require withstand voltage: the power frequency 2500V withstand voltage is not broken down for 5 seconds; insulation resistance: greater than 100 megaohms (500V).

The transition fit connector is made of copper alloy, and has good conductivity. The stud fixing block 14-2 for fixing the transitional fit connector terminal and the power line adopts stainless steel, and the reset piece adopts spring steel wires, so that the connector has enough mechanical strength.

Meanwhile, the special power strip for on-site verification of the electric energy meter can meet the following basic requirements:

(1) The working principle must conform to the wiring principle of the field verification work.

(2) The structure must be compatible with a "dedicated wiring backplane".

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. The utility model provides a row is inserted in special use of electric energy meter on-the-spot examination, includes the casing, the front end of casing is equipped with the connecting hole, and the rear end is equipped with the wiring hole, its characterized in that still includes:

the front connecting post is connected with the rear binding post, one end of the front connecting post is positioned in the shell, and the other end of the front connecting post extends out of the shell through the connecting hole; one end of the rear binding post is positioned in the shell, and the other end of the rear binding post penetrates out of the shell through the wiring hole;

the clamping plates are positioned in the shell, the middle parts of the clamping plates are fixed on the shell through hinge points, one ends of the clamping plates extend forwards to form hook arms, hooks are arranged at the tail ends of the hook arms, the hook arms extend out of the shell, the other ends of the clamping plates extend inwards to form swinging arms, and the swinging arms and the hook arms are L-shaped;

the swinging plate is positioned in the shell, and two ends of the swinging plate are connected with swinging arms of the two clamping plates;

the first spring is connected with the swinging plate and applies forward elastic force to the swinging plate;

the movable switch is arranged on the shell and is connected with the swing plate; the movable switch moves back and forth to drive the swing plate to move back and forth, and the swing plate drives the hook arm to swing left and right around the hinge point;

the rear binding post is fixed on the fixed sliding plate, the fixed sliding plate is connected with a third spring, the third spring applies forward elastic force to the fixed sliding plate, limiting plates are arranged on the left side and the right side of the front end of the fixed sliding plate, the limiting plates are connected with a fourth spring, and the fourth spring applies inward elastic force to the limiting plates; the swing plate is connected with the limit plate through a pushing structure; when the swinging plate moves downwards, the limiting plate is driven to move outwards through the pushing structure, so that the limiting plate releases the limit on the fixed sliding plate, and the fixed sliding plate moves inwards under the action of the third spring until the rear binding post is contracted into the shell;

the swing plate is provided with a first sliding hole, the fixed sliding plate is provided with a second sliding hole, and the movable switch penetrates through the first sliding hole and the second sliding hole.

2. The power strip for field verification of electrical energy meters of claim 1, wherein the housing comprises an upper cover and a lower cover that are snap-fit connected together.

3. The power meter on-site verification special power strip according to claim 1, wherein a fixed conductor is arranged in the shell, and the front connecting post and the rear binding post are respectively connected with the fixed conductor.

4. The power strip for field verification of electrical energy meters of claim 1, further comprising:

the insulation sleeve is sleeved on the front connecting column, a first baffle is arranged at one end of the insulation sleeve, which is positioned in the shell, and the outer edge of the first baffle is larger than the connecting hole;

and the second spring is connected with the first baffle plate and applies forward elastic force to the first baffle plate.

5. The power strip special for on-site verification of electric energy meter of claim 1, wherein the pushing structure is: the contact surface of the swing plate and/or the limiting plate is an inclined surface.

6. The power strip of claim 1, wherein in an initial state, a front edge of the first slide hole is away from a front edge of the movable switch.

7. The power strip special for on-site verification of electric energy meters according to claim 1, wherein the front connecting column is mounted on the sliding sleeve, a fifth spring is further arranged on the front connecting column, and the fifth spring applies forward elastic force to the front connecting column.

8. The method for using the power strip special for on-site verification of the electric energy meter according to any one of claims 1 to 7, which is characterized by comprising the following steps:

step (1): in the initial state, the swing plate is at the front end under the action of the first spring, the hook is in the open state, the limiting plate is at the inner end under the action of the fourth spring, and the fixed sliding plate is abutted against the limiting plate under the action of the third spring; the rear binding post on the fixed slide plate extends out of the shell; the front edge of the first sliding hole is far away from the front edge of the movable switch;

step (2): when the hooks are connected to the special wiring bottom plate, the hooks are stressed to be folded inwards to drive the swinging plate to move downwards, and the swinging plate pushes the limiting plate to move outwards until the limiting of the fixed sliding plate is directly released;

step (3): the hook returns to an open state under the action of a first spring connected with the swinging plate after passing through the maximum folding position, and the hook is buckled on the special wiring bottom plate; simultaneously, as the limiting plate releases the limit, the fixed sliding plate moves forwards to the maximum position under the action of the third spring, and the rear binding post moves upwards along with the fixed sliding plate until the rear binding post contracts into the shell, so that the metal part of the rear binding post is not leaked out;

at the moment, the rear edge of the movable switch is propped against the rear edge of the second sliding hole, and the rear edge of the first sliding hole is positioned at the rear end of the rear edge of the second sliding hole;

step (4): when the special power strip is checked, the movable switch is shifted backwards, and as the rear edge of the first sliding hole is positioned at the rear end of the rear edge of the second sliding hole, the movable switch only drives the fixed sliding plate to move backwards until the rear edge of the movable switch abuts against the rear edge of the first sliding hole, and the rear binding post stretches out;

step (5): the movable switch continues to dial backwards, and simultaneously drives the fixed sliding plate and the swinging plate to move backwards, and the swinging plate drives the hooks to fold inwards, so that the special power strip can be taken down from the special wiring bottom plate;

step (6): the movable switch is loosened, the first spring drives the swinging plate to move forwards, the swinging plate drives the hook to open, and the swing plate returns to an initial state; meanwhile, the swing plate drives the movable switch to move forwards, and the movable switch drives the fixed slide plate to move forwards; in the forward moving process, the limiting plate moves inwards under the action of the fourth spring until the fixed sliding plate is limited, and the fixed sliding plate is restored to the initial state.

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