阅读说明：本技术 一种便于单独抄表的工业用电表箱 (Industrial ammeter case convenient to check meter alone ) 是由 郭红霞 于 2021-07-29 设计创作，主要内容包括：本发明公开了一种便于单独抄表的工业用电表箱,包括箱体,所述箱体内设有线缆进出口装置,所述箱体内部设有弹性调节式梯形滑道装置,所述弹性调节式梯形滑道装置内设有梯形式电表安装板装置。本发明通过拉伸弹簧调节两个凹型滑道下端之间的宽度,使梯形式电表安装板能够挤压开两个凹型滑道,从而使梯形式电表安装板能够带着电表从电表箱的下端移出,降低电表的高度,以方便工作人员观看电表的表字,从而便于工作人员进行抄表工作,通过条形电磁铁一和条形电磁铁二之间的斥力与压缩弹簧的弹力配合,从而控制梯形式电表安装板的上升和下移,有效的方便工作人员的操作,同时装置的结构简单,成本较低,耗电量较小。(The invention discloses an industrial electric meter box convenient for independent meter reading, which comprises a box body, wherein a cable inlet and outlet device is arranged in the box body, an elastic adjusting type trapezoidal slideway device is arranged in the box body, and a ladder-shaped electric meter mounting plate device is arranged in the elastic adjusting type trapezoidal slideway device. According to the invention, the width between the lower ends of the two concave type slideways is adjusted through the extension spring, so that the trapezoidal type ammeter mounting plate can be extruded to open the two concave type slideways, the trapezoidal type ammeter mounting plate can be moved out from the lower end of the ammeter box, the height of the ammeter is reduced, and workers can conveniently watch the characters of the ammeter, so that the workers can conveniently perform meter reading work.)

1. An industrial electric meter box convenient for independent meter reading comprises a box body (1), wherein a cable inlet and outlet device is arranged in the box body (1), and the industrial electric meter box is characterized in that an elastic adjusting type trapezoidal slideway device is arranged in the box body (1), and a ladder-shaped electric meter mounting plate device is arranged in the elastic adjusting type trapezoidal slideway device;

the elastic adjustment type trapezoid slideway device comprises a box body (1), concave slideways (2) are installed on two sides of the inner center of the box body (1), a certain angle is formed between the concave slideways (2) and the inner side surface of the box body (1), the two concave slideways (2) are symmetrically distributed, a rotating seat (3) is installed on one side of the upper end of each concave slideway (2), one end of each rotating seat (3) is fixedly connected with the upper side surface of the box body (1), clamping holes (4) are formed in the lower side surface of each concave slideway (2), an adjusting seat (5) is arranged below the side surface of each concave slideway (2), the adjusting seat (5) is fixedly connected with the concave slideways (2) through a connecting rod (6), compression springs (7) are installed at four corners of the adjusting seat (5), and an adjusting baffle (8) is arranged between the adjusting seat (5) and the concave slideways (2), the adjusting baffle (8) is fixedly connected with the compression spring (7), an angle-shaped bolt (9) is arranged at the center of the adjusting baffle (8), a first strip-shaped electromagnet (10) is arranged on two sides of the center of the adjusting baffle (8), two sides of the clamping hole (4) are provided with a bar-shaped electromagnet II (11), the bar-shaped electromagnet II (11) is fixedly connected with the concave slideway (2), the first strip-shaped electromagnet (10) is movably contacted with the second strip-shaped electromagnet (11), the angle-shaped bolt (9) is movably inserted in the clamping hole (4), the lower end of the concave slideway (2) is provided with an adjusting rotating seat (12), an extension spring (13) is arranged between the adjusting rotating seats (12) on the two concave slideways (2), stretching columns (14) are mounted at two ends of the stretching spring (13), and the stretching columns (14) are fixedly connected with the adjusting rotating seat (12);

the ladder-shaped electric meter mounting plate device comprises a ladder-shaped electric meter mounting plate (15) arranged between two concave slide ways (2), the ladder-shaped electric meter mounting plate (15) is connected with the concave slide ways (2) in a sliding manner, clamping grooves (16) are formed in the lower portions of the side surfaces of the two sides of the ladder-shaped electric meter mounting plate (15), the angle-shaped bolts (9) are movably inserted into the clamping grooves (16), a plurality of cable fixing seats (17) are mounted at the lower end of the front surface of the ladder-shaped electric meter mounting plate (15), the cable fixing seats (17) are uniformly distributed on the ladder-shaped electric meter mounting plate (15), an insertion cable (18) is mounted on the cable fixing seats (17), a plurality of electricity transmission sliding forks (19) are mounted above the rear surface of the ladder-shaped electric meter mounting plate (15), and the electricity transmission sliding forks (19) are uniformly distributed above the rear surface of the ladder-shaped electric meter mounting plate (15), pass electric slip fork (19) and cable fixing base (17) one-to-one, pass through passing electric cable (20) fixed connection between electric slip fork (19) and cable fixing base (17), install a plurality of biography electric slide rail (21) on the inside rear side surface of box (1), a plurality of biography electric slide rail (21) evenly distributed are on box (1), install insulating cushion (22) between two adjacent biography electric slide rail (21), pass electric slide rail (21) and biography electric slip fork (19) one-to-one, pass electric slide fork (19) slip cartridge in passing electric slide rail (21), it has toper installing port (23) to open on box (1) lower surface, install sealed pad (24) in toper installing port (23), movable mounting has toper sealing bottom plate (25) in toper installing port (23), between toper sealing bottom plate (25) and the trapezoidal formula ammeter mounting panel (15) through bottom plate connecting rod (26) fixed even And one side of the center of the lower surface of the conical sealing bottom plate (25) is provided with a pulling handle (27), and the other side of the center of the lower surface of the conical sealing bottom plate (25) is provided with a control switch (28).

2. The industrial electric meter box convenient for meter reading independently as claimed in claim 1, wherein the cable inlet and outlet device comprises a cable inlet (29) formed at one end of the lower surface of the box body (1), a cable outlet (30) formed at the other end of the lower surface of the box body (1), and the cable inlet (29) and the cable outlet (30) are located at two sides of the conical mounting hole (23).

3. The industrial electric meter box convenient for individual meter reading according to claim 1, characterized in that the magnetic force between the first strip-shaped electromagnet (10) and the second strip-shaped electromagnet (11) is repulsive force.

4. The industrial electric meter box facilitating individual meter reading according to claim 1, wherein the friction between the ladder-shaped electric meter mounting plate (15) and the concave slideway (2) is lower than the maximum gravity of the ladder-shaped electric meter mounting plate (15).

5. The industrial electric meter box facilitating individual meter reading according to claim 1, wherein the maximum gravity of the ladder-shaped electric meter mounting plate (15) is larger than the minimum elastic force of the extension spring (13).

6. The industrial electric meter box convenient for individual meter reading according to claim 1, characterized in that the first strip-shaped electromagnet (10) and the second strip-shaped electromagnet (11) are electrically connected with a power transmission slide rail corresponding to the access cable.

7. The industrial electric meter box convenient for individual meter reading of claim 1, wherein the plurality of electric transmission sliding rails (21) are respectively and electrically connected with the incoming cable and the outgoing cable one by one.

8. The industrial electric meter box facilitating individual meter reading as claimed in claim 1, characterized in that the length of the upper edge of the ladder-shaped electric meter mounting plate (15) is less than the maximum distance between the two concave slideways (2).

9. The industrial electric meter box facilitating individual meter reading as claimed in claim 1, wherein the length of the upper end of the ladder-shaped electric meter mounting plate (15) is longer than the length of the lower end.

10. The industrial electric meter box convenient for meter reading independently of claim 1, wherein the electricity-transmitting sliding fork (19) is provided with an insulating shell (31), and the electricity-transmitting sliding fork (19) extends out of the insulating shell (31).

Technical Field

The invention relates to the field of electric power related equipment, in particular to an industrial electric meter box convenient for independent meter reading.

Background

The ammeter case is arranged in cable branch case, low voltage distribution box, water pump control box, communication device cabinet, street lamp and traffic light control box, multi-functional batch meter, batch meter etc. among the public power grid usually, and in the industrial area, the use of ammeter case is especially common, and its effect is very important, when the staff maintenance of being convenient for checks, also can make things convenient for the staff to copy its ammeter reading.

Because the ammeter case is when using, the ammeter case is located the open air for a long time, and the ammeter case can receive shining of sunshine, birds excrement and urine, rainwater and dust's combination for transparent ammeter case becomes no longer transparent originally, influences staff's observation, simultaneously in order to avoid personnel's touching, the height of ammeter case can be a little higher than human height, this just leads to tearing the table during operation at the staff, and the number of words of observation the ammeter that is very difficult clear seriously influences staff's the efficiency of checking meter.

Disclosure of Invention

The invention aims to solve the problems and designs an industrial electric meter box convenient for independent meter reading.

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

an industrial electric meter box convenient for independent meter reading comprises a box body, wherein a cable inlet and outlet device is arranged in the box body, an elastic adjusting type trapezoidal slideway device is arranged in the box body, and a ladder-shaped electric meter mounting plate device is arranged in the elastic adjusting type trapezoidal slideway device;

the elastic adjustment type trapezoid slideway device comprises concave slideways arranged on two sides of the center of the interior of a box body, wherein a certain angle is formed between the concave slideways and the inner side surface of the box body, the two concave slideways are symmetrically distributed, a rotating seat is arranged on one side of the upper end of the concave slideway, one end of the rotating seat is fixedly connected with the upper part of the side surface of the box body, a clamping hole is formed in the lower part of the side surface of the concave slideway, an adjusting seat is arranged below the side surface of the concave slideway, the adjusting seat is fixedly connected with the concave slideway through a connecting rod, compression springs are arranged at four corners of the adjusting seat, an adjusting baffle is arranged between the adjusting seat and the concave slideway, the adjusting baffle is fixedly connected with the compression springs, an angle-shaped bolt is arranged at the center of the adjusting baffle, and a bar-shaped electromagnet I is arranged on two sides of the center of the adjusting baffle, the two sides of the clamping hole are provided with a bar-shaped electromagnet II which is fixedly connected with the concave slideway, the bar-shaped electromagnet I is movably contacted with the bar-shaped electromagnet II, the angle-shaped bolt is movably inserted into the clamping hole, the lower end of the concave slideway is provided with an adjusting rotating seat, an extension spring is arranged between the adjusting rotating seats on the two concave slideways, two ends of the extension spring are provided with extension columns, and the extension columns are fixedly connected with the adjusting rotating seats;

the ladder-shaped electric meter mounting plate device comprises a ladder-shaped electric meter mounting plate arranged between two concave type slideways, the ladder-shaped electric meter mounting plate is connected with the concave type slideways in a sliding manner, clamping grooves are formed below the side surfaces of two sides of the ladder-shaped electric meter mounting plate, the angle-shaped bolt is movably inserted into the clamping grooves, a plurality of cable fixing seats are arranged at the lower end of the front surface of the ladder-shaped electric meter mounting plate, the cable fixing seats are uniformly distributed on the ladder-shaped electric meter mounting plate, inserting cables are arranged on the cable fixing seats, a plurality of electricity transmission sliding forks are arranged above the rear surface of the ladder-shaped electric meter mounting plate and are uniformly distributed above the rear surface of the ladder-shaped electric meter mounting plate, the electricity transmission sliding forks are in one-to-one correspondence with the cable fixing seats, and the electricity transmission sliding forks are fixedly connected with the cable fixing seats through electricity transmission cables, install a plurality of biography electricity slide rails on the inside rear side surface of box, a plurality of biography electricity slide rail evenly distributed are on the box, install insulating cushion between two adjacent biography electricity slide rails, biography electricity slide rail and biography electricity slide fork one-to-one, it slides the cartridge in passing the electricity slide rail to pass electricity slide fork, it has the toper installing port to open on the box lower surface, install sealed the pad in the toper installing port, movable mounting has toper sealing bottom plate in the toper installing port, through bottom plate connecting rod fixed connection between toper sealing bottom plate and the trapezoidal formula ammeter mounting panel, the pulling handle is installed to toper sealing bottom plate's lower surface center department one side, control switch is installed to toper sealing bottom plate's lower surface center department opposite side.

Furthermore, the cable inlet and outlet device comprises a cable inlet formed in one end of the lower surface of the box body, a cable outlet formed in the other end of the lower surface of the box body, and the cable inlet and the cable outlet are located on two sides of the conical mounting opening.

Furthermore, the magnetic force between the first strip-shaped electromagnet and the second strip-shaped electromagnet is repulsive force.

Further, the friction force between the ladder-shaped electric meter mounting plate and the concave slide way is lower than the maximum gravity of the ladder-shaped electric meter mounting plate.

Further, the maximum gravity of the trapezoidal electric meter mounting plate is greater than the minimum elastic force of the extension spring.

Furthermore, the first strip-shaped electromagnet and the second strip-shaped electromagnet are electrically connected with the power transmission slide rail corresponding to the access cable.

Furthermore, the plurality of power transmission slide rails are respectively and electrically connected with the access cable and the output cable one by one.

Further, the length of the upper edge of the trapezoidal electric meter mounting plate is smaller than the maximum distance between the two concave slideways.

Further, the length of the upper end of the trapezoidal electric meter mounting plate is greater than that of the lower end of the trapezoidal electric meter mounting plate.

Furthermore, install insulating casing on passing electric sliding fork, pass electric sliding fork and stretch out outside insulating casing.

The industrial electric meter box convenient for independent meter reading manufactured by the technical scheme of the invention has the following beneficial effects:

this ammeter case adjusts the width between two concave type slide lower extremes through extension spring, makes trapezoidal formula ammeter mounting panel can extrude two concave type slides of opening to make trapezoidal formula ammeter mounting panel can take the ammeter to shift out from the lower extreme of ammeter case, reduce the height of ammeter, in order to make things convenient for the staff to watch the table word of ammeter, thereby the staff of being convenient for carries out the work of checking meter.

This ammeter case through the cooperation of passing electricity slip fork and passing electricity slide rail, can make trapezoidal formula ammeter mounting panel at the removal in-process, and the ammeter is still in normal connection to avoid the emergence of the outage condition, simultaneously through the use of insulating cushion and insulating casing, can avoid the emergence of the string electricity condition.

This ammeter case, repulsion and compression spring's elasticity cooperation through bar electro-magnet one and bar electro-magnet between two to the rising of control ladder form ammeter mounting panel with move down, the effectual operation that makes things convenient for the staff, the simple structure of device simultaneously, the cost is lower, and power consumption is less.

Drawings

FIG. 1 is a schematic diagram of an industrial electric meter box convenient for individual meter reading according to the present invention;

FIG. 2 is a schematic view of the invention shown in FIG. 1 after opening;

FIG. 3 is an enlarged view of a portion of the elastically adjustable trapezoidal track of the present invention;

FIG. 4 is a schematic view of a ladder-type electric meter mounting plate according to the present invention;

FIG. 5 is a rear view of the ladder form electricity meter mounting plate of the present invention;

FIG. 6 is a schematic view of the insulating cushion of the present invention;

FIG. 7 is a schematic view of the insulating housing of the present invention;

FIG. 8 is a schematic view of a tapered mounting port according to the present invention;

in the figure, 1, a box body; 2. a concave slideway; 3. a rotating seat; 4. a clamping hole; 5. an adjusting seat; 6. a connecting rod; 7. a compression spring; 8. adjusting the baffle; 9. an angle-shaped bolt; 10. a first strip-shaped electromagnet; 11. a bar-shaped electromagnet II; 12. adjusting the rotating seat; 13. an extension spring; 14. stretching the column; 15. a ladder-shaped electric meter mounting plate; 16. clamping the groove; 17. a cable fixing seat; 18. plugging a cable; 19. a power transmission sliding fork; 20. a power transmission cable; 21. a power transmission slide rail; 22. an insulating soft pad; 23. a conical mounting opening; 24. a gasket; 25. a conical sealing bottom plate; 26. a base plate connecting rod; 27. pulling the handle; 28. a control switch; 29. a cable inlet; 30. a cable outlet; 31. an insulating housing.

Detailed Description

The invention is described in detail below with reference to the drawings, which are shown in fig. 1-8.

In the device, the first strip-shaped electromagnet 10 and the second strip-shaped electromagnet 11 are electrically connected with an external access cable through a control switch 28, so that the operation of the whole device is controlled.

The invention of the scheme is characterized in that the elastic regulation type trapezoidal slideway device comprises a box body 1, a concave slideway 2 arranged at two sides of the inner center of the box body 1, a certain angle is formed between the concave slideway 2 and the inner side surface of the box body 1, the two concave slideways 2 are symmetrically distributed, a rotating seat 3 is arranged at one side of the upper end of each concave slideway 2, one end of the rotating seat 3 is fixedly connected with the upper part of the side surface of the box body 1, a clamping hole 4 is arranged below the side surface of each concave slideway 2, an adjusting seat 5 is arranged below the side surface of each concave slideway 2, the adjusting seat 5 is fixedly connected with the concave slideway 2 through a connecting rod 6, a compression spring 7 is arranged at the four corners of the adjusting seat 5, an adjusting baffle 8 is arranged between the adjusting seat 5 and the concave slideway 2, the adjusting baffle 8 is fixedly connected with the compression spring 7, and an angle-shaped bolt 9 is arranged at the center of the adjusting baffle 8, the two sides of the center of the adjusting baffle 8 are provided with a first strip electromagnet 10, the two sides of the clamping hole 4 are provided with a second strip electromagnet 11, the second strip electromagnet 11 is fixedly connected with the concave slideway 2, the first strip electromagnet 10 is movably contacted with the second strip electromagnet 11, the angle bolt 9 is movably inserted in the clamping hole 4, the lower end of the concave slideway 2 is provided with an adjusting rotating seat 12, an extension spring 13 is arranged between the adjusting rotating seats 12 on the two concave slideways 2, the two ends of the extension spring 13 are provided with extension columns 14, and the extension columns 14 are fixedly connected with the adjusting rotating seat 12; elasticity through extension spring 13 can make two concave type slides 2 carry out angle modulation simultaneously, thereby conveniently adjust two concave type slide 2's angle, make trapezoidal formula ammeter mounting panel 15 slide from top to bottom, through the magnetic force of bar electro-magnet 10 and bar electro-magnet two 11 and compression spring 7's elastic fit, control angle type bolt 9 is flexible to be adjusted, thereby make things convenient for staff's control operation, the upper and lower slip simple structure of device simultaneously, the operation is convenient again, power consumption is extremely low, can be very big make things convenient for staff's the work of checking meter.

The creation point of the scheme lies in the structural design of the trapezoidal electric meter mounting plate device, and combines the attached drawing 1, the attached drawing 2, the attached drawing 4, the attached drawing 5, the attached drawing 6, the attached drawing 7 and the attached drawing 8, the trapezoidal electric meter mounting plate device comprises a trapezoidal electric meter mounting plate 15 arranged between two concave slideways 2, the trapezoidal electric meter mounting plate 15 is connected with the concave slideways 2 in a sliding way, clamping grooves 16 are arranged below the side surfaces of two sides of the trapezoidal electric meter mounting plate 15, angle-shaped bolts 9 are movably inserted into the clamping grooves 16, a plurality of cable fixing seats 17 are arranged at the lower end of the front surface of the trapezoidal electric meter mounting plate 15, the cable fixing seats 17 are uniformly distributed on the trapezoidal electric meter mounting plate 15, plug-in cables 18 are arranged on the cable fixing seats 17, a plurality of electricity transmission sliding forks 19 are arranged above the rear surface of the trapezoidal electric meter mounting plate 15, and a plurality of electricity transmission sliding forks 19 are uniformly distributed above the rear surface of the trapezoidal electric meter mounting plate 15, the electric transmission sliding forks 19 correspond to the cable fixing seats 17 one by one, the electric transmission sliding forks 19 are fixedly connected with the cable fixing seats 17 through electric transmission cables 20, a plurality of electric transmission sliding rails 21 are installed on the rear side surface inside the box body 1, the electric transmission sliding rails 21 are uniformly distributed on the box body 1, an insulating cushion 22 is installed between every two adjacent electric transmission sliding rails 21, the electric transmission sliding rails 21 correspond to the electric transmission sliding forks 19 one by one, the electric transmission sliding forks 19 are slidably inserted into the electric transmission sliding rails 21, a conical installation opening 23 is formed in the lower surface of the box body 1, a sealing gasket 24 is installed in the conical installation opening 23, a conical sealing bottom plate 25 is movably installed in the conical installation opening 23, the conical sealing bottom plate 25 is fixedly connected with the trapezoidal electric meter installation plate 15 through a bottom plate connecting rod 26, a pulling handle 27 is installed on one side of the center of the lower surface of the conical sealing bottom plate 25, and a control switch 28 is installed on the other side of the center of the lower surface of the conical sealing bottom plate 25; through the use of trapezoidal ammeter mounting panel 15, make the ammeter move down the in-process, can be through the gravity and the frictional resistance of device self, the elasticity cooperation of extension spring 13, make trapezoidal ammeter mounting panel 15 can slowly move when moving down, simultaneously can not move down too long distance again, thereby the safe handling of protection ammeter, avoid the ammeter to take place to shake and produce the damage, through the use of biography electricity slide fork 19 and biography electricity slide rail 21, on the one hand can make trapezoidal ammeter mounting panel 15 move the in-process, keep electric power transmission's stability, on the other hand can avoid trapezoidal ammeter mounting panel 15 moving out the in-process again, the staff touches and takes place the electric shock phenomenon, and through the use of toper sealing bottom plate 25, can seal the bottom of box 1, avoid box 1 to expose and make the ammeter laying dust.

In this device, the frictional force between trapezoidal formula ammeter mounting panel 15 and concave type slide 2 is less than the biggest gravity of trapezoidal form ammeter mounting panel 15, can make trapezoidal formula ammeter mounting panel 15 can move down automatically to stagger angle type bolt 9 and joint recess 16.

In the device, the maximum gravity of the trapezoidal electric meter mounting plate 15 is greater than the minimum elastic force of the extension spring 13, so that the trapezoidal electric meter mounting plate 15 can automatically move downwards to stagger the angle-shaped bolt 9 and the clamping groove 16.

In this device, bar electromagnet one 10 and bar electromagnet two 11 and the biography electric slide electric connection that inserts the cable and correspond guarantee the stability of power supply, because bar electromagnet one 10 and bar electromagnet two 11 only open the power supply in the twinkling of an eye simultaneously again, make the device power consumptive extremely low, can not cause too big electric quantity loss.

In the device, the insulating shell 31 is arranged on the electricity-transmitting sliding fork 19, and the electricity-transmitting sliding fork 19 extends out of the insulating shell 31, so that the occurrence of electricity crosstalk is avoided.

The working principle is as follows:

when the device is needed to be used, firstly, the box body 1 is installed at the electric meter installation position, at the moment, the device is in a half-open state, a worker pulls the pulling handle 27 to enable the pulling handle 27 to drive the conical sealing bottom plate 25 to start moving downwards, so that the ladder-shaped electric meter installation plate 15 is driven to move downwards through the bottom plate connecting rod 26, along with the downward movement of the ladder-shaped electric meter installation plate 15, the ladder-shaped electric meter installation plate 15 gradually squeezes open the two concave slideways 2 in the downward movement process, the adjusting rotating seat 12 at the lower ends of the two concave slideways 2 drives the stretching column 14 to pull open the stretching spring 13, so that the two concave slideways 2 gradually carry out corresponding adjustment along with the downward movement of the ladder-shaped electric meter installation plate 15, and after the ladder-shaped electric meter installation plate 15 is moved out to the maximum extent, at the moment, the ladder-shaped electric meter installation plate 15 enables the friction force between the concave slideways 2 and the ladder-shaped electric meter installation plate 15 to be larger through the elasticity of the stretching spring 15, thereby enabling the trapezoidal type electric meter mounting plate 15 to be in a fixed state;

the electric meter and the corresponding switch are respectively installed on the trapezoidal electric meter installation plate 15 by a worker through a tool, then the worker peels and installs the cable between the electric meter and the switch, then the worker manually connects the plug-in cable 18 on the cable fixing seat 17 with the switch according to the wiring mode, at the moment, the worker can insert the incoming cable and the outgoing cable into the box body 1 from the cable inlet 29 and the cable outlet 30 respectively, then connect the incoming cable with the corresponding power transmission slide rail 21, and then connect the outgoing cable with the corresponding power transmission slide rail 21, at the moment, the electric meter is installed completely, the worker manually pushes the conical sealing bottom plate 25 to move upwards, so that the conical sealing bottom plate 25 drives the trapezoidal electric meter installation plate 15 to move upwards, thereby moving back to the inside of the box body 1 completely, and moving upwards along with the trapezoidal electric meter installation plate 15, the clamping groove 16 gradually moves to the position of the angle-shaped bolt 9, and the angle-shaped bolt 9 is inserted into the clamping groove 16 through the elasticity of the compression spring 7, so that the trapezoidal electric meter mounting plate 15 is fixed inside the box body 1, and meanwhile, the conical sealing bottom plate 25 is also fixed with the bottom of the box body 1 in a sealing manner.

When meter reading is needed, at the moment, a worker manually presses the control switch 28, at the moment, the access cable starts to supply power to the first bar-shaped electromagnet 10 and the second bar-shaped electromagnet 11, so that the first bar-shaped electromagnet 10 and the second bar-shaped electromagnet 11 are electrified and generate magnetic force, as repulsion force is generated between the first bar-shaped electromagnet 10 and the second bar-shaped electromagnet 11, the second bar-shaped electromagnet 11 pushes the first bar-shaped electromagnet 10 to move, the bar-shaped electromagnet 10 drives the adjusting baffle 8 to move and drives the compression spring 7 to compress, the movement of the adjusting baffle 8 drives the angle-shaped bolt 9 to move, so that the angle-shaped bolt 9 contracts in the clamping hole 4, the angle-shaped bolt 9 moves out of the clamping groove 16, and the ladder-shaped ammeter mounting plate 15 starts to move downwards through self gravity at the moment, the two concave slideways 2 are gradually unfolded, the extension spring 13 is driven to start to extend to generate elasticity, and when the trapezoidal electric meter mounting plate 15 descends to a certain degree, the elasticity of the extension spring 13 and the frictional resistance borne by the trapezoidal electric meter mounting plate 15 are leveled with the gravity of the trapezoidal electric meter mounting plate 15, so that the trapezoidal electric meter mounting plate 15 stops descending;

and owing to joint recess 16 and the dislocation of angle type bolt 9 this moment, make ladder form ammeter mounting panel 15 be in portable state, the staff is through holding pulling handle 27, make pulling handle 27 drive toper sealing bottom plate 25 and move down, and drive ladder form ammeter mounting panel 15 through bottom plate connecting rod 26 and move down, thereby make the box 1 that shifts out of ladder form ammeter mounting panel 15 maximize, and along with ladder form ammeter mounting panel 15 shifts out box 1, make the height that the ammeter was located this moment begin to descend, after ladder form ammeter mounting panel 15 descends and finishes, the ammeter is in the height that the staff can clearly observe this moment, the staff alright observe the meter word of ammeter through the range estimation, thereby carry out the work of checking meter.

In this device, trapezoidal formula ammeter mounting panel 15's removal drives to pass electricity slide fork 19 and removes, and through the sliding connection who passes electricity slide fork 19 and pass electricity slide rail 21 for the ammeter is in the on-state constantly at trapezoidal formula ammeter mounting panel 15's removal in-process, thereby the ammeter normal operating avoids leading to trapezoidal formula ammeter mounting panel 15's removal to produce the outage problem because of checking meter.

In the device, the electric conduction sliding fork 19 and the electric conduction sliding rail 21 are protected by the insulating soft pad 22 and the insulating shell 31, so that the electric conduction sliding fork 19 and the electric conduction sliding rail 21 cannot generate the problem of electric cross connection, and the operation of the device is protected.

In this device, pass electric slide fork 19 and be located the upper end at terraced form ammeter mounting panel 15 back for pass electric slide fork 19 and be located inside box 1 all the time, thereby when making the staff touch terraced form ammeter mounting panel 15's back, can not take place the condition of electrocuteeing.

In this device, the staff can place the drier on toper sealing bottom plate 25 to guarantee the inside dry of box 1, cable import 29 and cable export 39 can seal the access cable and connect out the cable through rubber simultaneously, thereby guarantee the inside aridity of box 1.

In this device, the wiring mode of ammeter is simple swift, and it is more obvious with the correspondence of cable fixing base 17 to pass electric slide rail 21 simultaneously, makes the ammeter when installation and maintenance, and the staff can distinguish fast and correspond the cable, saves staff's installation and maintenance duration.

The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.