CN209946358U

CN209946358U - Detection device and detection trolley

Info

Publication number: CN209946358U
Application number: CN201821985029.XU
Authority: CN
Inventors: 王伟; 汪鹏; 张繁; 伍国兴; 廖伟兴; 杨海明; 曾乔迪; 何茂钦; 段方成; 陈龙; 张书辉
Original assignee: Shenzhen Power Supply Bureau Co Ltd
Current assignee: Shenzhen Power Supply Bureau Co Ltd
Priority date: 2018-11-29
Filing date: 2018-11-29
Publication date: 2020-01-14
Anticipated expiration: 2028-11-29

Abstract

The application provides a detection device and a detection trolley. The detection device comprises a main sleeve, a displacement sensor and a driving part. The detection device simulates a moving contact of a switch trolley. The contact state of the driving part and the fixed contact of the switch cabinet completely simulates the contact state of the fixed contact of the switch cabinet and the movable contact of the switch trolley. The length of the main sleeve is the same as that of the contact arm of the switch trolley. The detection device is also provided with a displacement sensor and a driving part. When the main body sleeve moves towards the static contact, the static contact pushes the driving part to move along the sleeve in the axial direction. The displacement sensor is used for detecting the distance of the driving part entering the main body sleeve, namely the distance of the static contact entering the main body sleeve. When the distance of the static contact entering the main body sleeve accords with the matching distance of the movable contact and the static contact, the static contact is in good contact with the movable contact of the switch trolley.

Description

Detection device and detection trolley

Technical Field

The application belongs to the field of measurement, and particularly relates to a detection device and a detection trolley.

Background

A main loop switch of the armored movable alternating current metal closed switch cabinet adopts a switchable trolley type. The switch trolley is provided with a contact arm, and a moving contact is arranged in the contact arm. The switch trolley is gradually close to the switch cabinet. A static contact of the switch cabinet extends into a contact arm to be in contact with a moving contact, and the moving contact and the static contact are conducted.

When the switch trolley reaches the working position, the distance between the fixed contact and the moving contact of the switch cabinet is directly influenced by the distance between the fixed contact and the moving contact. The distance that the static contact of cubical switchboard deepened the arm is short excessively, leads to not mutually contacting or contact failure between static contact and the moving contact. The moving contact and the static contact are not contacted with each other, and the moving contact and the static contact cannot be conducted. The moving contact and the static contact are in poor contact, electric arcs are generated between the moving contact and the static contact, and then faults are caused. How to detect whether the contact between the static contact and the moving contact is good is a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a detection device and a detection trolley for detecting whether the contact between the fixed contact and the movable contact is good.

A detection device includes: main part sleeve, displacement sensor and drive division. The displacement sensor is arranged in the main body sleeve. The driving part is movably arranged in the main body sleeve. One end of the driving part is in contact with the displacement sensor, and the other end of the driving part is in contact with a static contact of the switch cabinet to be detected. When the main body sleeve moves towards the static contact, the displacement sensor is used for detecting the distance that the static contact pushes the driving part to enter the main body sleeve.

In one embodiment, the displacement sensor includes a sensing sleeve and a guide rod. The detection sleeve is fixedly arranged in the main body sleeve. The guide rod is arranged on the detection sleeve. One end of the guide rod is in contact with the driving part. When the main body sleeve moves towards the static contact, the driving part pushes the guide rod to move axially in the detection sleeve. And detecting the moving distance of the static contact in the main body sleeve through the moving distance of the guide rod in the detection sleeve.

In one embodiment, the displacement sensor further comprises a spring. The spring set up in detect the sleeve in, the one end of spring is contradicted detect telescopic inner wall, the other end with guide arm fixed connection.

In one embodiment, the detection sleeve further comprises at least one fixing plate. The fixed plate is fixedly arranged on the outer wall of the detection sleeve, and the detection sleeve is fixed on the inner wall of the main body sleeve through the fixed plate.

In one embodiment, the fixing plate is provided with a threaded hole, and the main body sleeve is provided with a positioning hole corresponding to the threaded hole.

In one embodiment, the body sleeve includes a first cylinder and a second cylinder. The driving part is arranged on the first cylinder. The second barrel is coaxially communicated with the first barrel, and the positioning hole is formed in the second barrel.

In one embodiment, the diameter of the first cylinder is greater than the diameter of the second cylinder.

In one embodiment, the driving part is a cylinder, and the diameter of the driving part is the same as the inner diameter of the first cylinder.

An inspection trolley comprises the inspection device in any one of the above embodiments.

In one embodiment, the inspection trolley further comprises: the device comprises a box body, a feeding device and a control device. The detection device is arranged in the box body. The feeding device is fixedly connected with the box body and used for driving the box body to move. The control device is arranged in the box body. The control device is electrically connected with the detection device and used for displaying the distance of the driving part entering the main body sleeve.

The application provides a detection device and a detection trolley. The detection device simulates a moving contact of a switch trolley. The contact state of the driving part and the fixed contact of the switch cabinet completely simulates the contact state of the fixed contact of the switch cabinet and the movable contact of the switch trolley. The length of the main sleeve is the same as that of the contact arm of the switch trolley. When the main body sleeve moves towards the static contact, the static contact pushes the driving part to move axially along the main body sleeve. The displacement sensor is used for detecting the distance of the driving part entering the main sleeve. The detection device detects the distance of the fixed contact entering the main body sleeve by simulating the contact state of the fixed contact of the switch cabinet and the movable contact of the switch trolley, namely the distance of the fixed contact entering the contact arm of the switch trolley. When the distance of the static contact entering the main body sleeve accords with the matching distance of the movable contact and the static contact, the static contact is in good contact with the movable contact of the switch trolley.

Drawings

FIG. 1 is an exploded view of a detection device according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a detection apparatus provided in an embodiment of the present application;

fig. 3 is a schematic diagram illustrating a state of the detection device engaged with the switch cabinet according to an embodiment of the present application;

FIG. 4 is a schematic view of a switch cart provided in an embodiment of the present application;

FIG. 5 is a schematic view of a switch cart provided in another embodiment of the present application;

FIG. 6 is a schematic electrical connection diagram of a switch cart provided in an embodiment of the present application.

The reference numbers illustrate:

detection device 10

Switch cabinet 100

Fixed contact 110

Main body sleeve 20

First barrel 210

Second cylinder 220

Positioning hole 221

Displacement sensor 30

Detection sleeve 310

Fixing piece 311

Threaded hole 312

Guide rod 320

Spring 330

Drive unit 40

Detection trolley 60

Case 610

Feeding device 620

Control device 630

Control mainboard 631

Energy storage device 632

Display device 633

Charging management device 634

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and fig. 2, a detecting device 10 is provided in the present embodiment. The detection device 10 includes a main body sleeve 20, a displacement sensor 30, and a driving part 40. The displacement sensor 30 is disposed in the main body sleeve 20. The driving portion 40 is movably disposed in the main body sleeve 20. One end of the driving portion 40 is in contact with the displacement sensor 30, and the other end of the driving portion 40 is in contact with a fixed contact 110 of the switch cabinet 100 to be tested. When the main sleeve 20 moves toward the fixed contact 110, the displacement sensor 30 is configured to detect a distance that the fixed contact 110 pushes the driving portion 40 into the main sleeve 20.

The application provides a detection device 10 and a detection trolley 60 with the same. The detection device 10 simulates a moving contact of a switch trolley. The contact state of the driving part 40 and the fixed contact 110 of the switch cabinet 100 completely simulates the contact state of the fixed contact 110 and the movable contact of the switch trolley. The length of the main sleeve 20 is the same as that of the contact arm of the switch trolley. When the main sleeve 20 moves toward the fixed contact 110, the fixed contact 110 pushes the driving portion 40 to move axially along the main sleeve 20. The displacement sensor 30 is used to detect the distance of the driving part 40 entering the main body sleeve 20. The length of the main sleeve 20 is the same as that of the contact arm of the switch trolley. The detection device 10 detects the distance that the static contact 110 enters the main body sleeve 20, which is the distance that the static contact 110 enters the contact arm of the switch trolley. When the distance that the static contact 110 enters the main body sleeve 20 meets the matching distance of the moving contact and the static contact, the contact between the static contact 110 and the moving contact of the switch trolley is good.

Referring to fig. 3, in a medium-voltage or high-voltage power grid, a switch cabinet is generally used for switching on and off. The switch cabinet comprises a switch cabinet body and a switch trolley. The contact on the switch cabinet 100 is a fixed contact 110, and the contact on the switch trolley is a movable contact. The switch trolley is provided with a contact arm, and the moving contact is arranged in the contact arm. The switch trolley is provided with a feeding device for pushing the switch trolley to move. When the switch is closed, the contact arm and the switch trolley approach to the fixed contact 110 of the switch cabinet 100, and the fixed contact 110 extends into the contact arm. When the fixed contact 110 is completely engaged with the movable contact, the power grid connected to the switch cabinet 100 and the switch trolley is turned on. When the switch is opened, the moving contact of the switch trolley is away from the fixed contact 110 of the switch cabinet 100 along with the contact arm. When the fixed contact 110 and the movable contact 110 are completely separated, the power grid line connected with the switch cabinet and the switch trolley is turned off.

The length of the main sleeve 20 is the same as that of the contact arm, and the inner diameter of the main sleeve 20 is the same as that of the contact arm. When a closing state is simulated, the main sleeve 20 is close to the fixed contact 110 of the switch cabinet 100, and the fixed contact 110 extends into the main sleeve 20. The distance of the fixed contact 110 extending into the main sleeve 20 is the same as the distance of the fixed contact 110 extending into the contact arm. The engagement state of the detection device 10 and the fixed contact 110 of the switch cabinet 100 completely simulates the engagement state of the contact arm of the switch trolley and the movable contact and the fixed contact 110 of the switch cabinet 100. The distance that the static contact 110 penetrates into the main body sleeve 20 is the distance that the static contact 110 penetrates into the contact arm.

The main sleeve 20 can also support and enclose the displacement sensor 30 and the driving part 40, and provide a mounting platform for the displacement sensor 30 and the driving part 40. The body sleeve 20 may be rubber, plastic or metal. In one embodiment, the main sleeve 20 is made of rubber, which has good insulation property, and prevents static electricity generated by friction during movement from affecting the measurement accuracy of the displacement sensor 30.

The displacement sensor 30 can detect the depth of the fixed contact 110 penetrating into the main body sleeve 20. The displacement sensor 30 is a linear device that is metal-sensitive and can convert a mechanical displacement amount into an electric quantity. The displacement sensor 30 may be a potentiometer displacement sensor, an inductive displacement sensor, a capacitive displacement sensor, an eddy current displacement sensor, a hall displacement sensor, or the like. In one embodiment, the displacement sensor 30 is a potentiometer-type displacement sensor 30. The displacement sensor 30 converts the mechanical displacement into a resistance or voltage output that is linear or an arbitrary function thereof via a potentiometer element. The potentiometer has a defined relationship between the change in displacement and the change in resistance.

In the above embodiment, the main body sleeve 20 is close to the fixed contact 110, causing the resistance of the moving end of the potentiometer in the displacement sensor 30 to change. The amount of change in resistance reflects the magnitude of the displacement, and an increase or decrease in resistance indicates the direction of the displacement. A supply voltage is typically applied to the potentiometer to convert the resistance change to a voltage output. The magnitude of the voltage can reflect the distance of the stationary contact 110 penetrating into the main body sleeve 20. The potentiometer is a wire-wound potentiometer. Since the resistance of the wire-wound potentiometer changes in steps with the turn resistance when the brush thereof moves, the output characteristic thereof also has a step shape.

In the above embodiment, the displacement sensor 30 has a reset function. When measuring the displacement amount, the measuring end of the displacement sensor 30 is displaced. When the measurement is completed, the measuring end of the displacement sensor 30 can be automatically reset for the next use. The driving portion 40 contacts the fixed contact 110, and when the main body sleeve 20 moves toward the fixed contact 110, the driving portion 40 drives the detection end of the displacement sensor 30 to move. When the main sleeve 20 moves away from the stationary contact 110, the detection end of the displacement sensor 30 can push the driving portion 40 to reset for the next measurement.

The driving unit 40 is connected to a detection end of the displacement sensor 30. The driving unit 40 may be movably connected to the detection end of the displacement sensor 30, or may be fixedly connected to the detection end. In one embodiment, the driving portion 40 is fixedly connected to the detecting end of the displacement sensor 30. The end surface of the driving part 40 close to the displacement sensor 30 is provided with a groove. The size of the groove corresponds to the sensing end of the displacement sensor 30. The detection end of the displacement sensor 30 can be inserted into the groove. In the above embodiment, the detecting end of the displacement sensor 30 is adhered to the groove.

The material of the driving part 40 may be plastic, rubber, or metal. In one embodiment, the driving portion 40 is made of plastic, and has a hard texture, does not deform, and can accurately transmit the displacement. The driving unit 40 may have a three-dimensional shape such as a rectangular parallelepiped, a cube, or a cylinder. In one embodiment, the driving portion 40 is a cylinder having a diameter equal to the inner diameter of the main sleeve 20, so as to ensure the driving portion 40 to move linearly along the axial direction of the main sleeve 20.

In one embodiment, the displacement sensor 30 includes a sensing sleeve 310 and a guide 320. The detection sleeve 310 is fixedly disposed in the main body sleeve 20. The guide rod 320 is disposed on the detecting sleeve 310. One end of the guide bar 320 is in contact with the driving part 40. When the main body sleeve 20 moves toward the stationary contact 110, the driving portion 40 pushes the guide rod 320 to move axially on the detection sleeve 310. The moving distance of the fixed contact 110 in the main body sleeve 20 is detected by the moving distance of the guide rod 320 in the detection sleeve 310. The potentiometer is disposed within the detection sleeve 310. The wiper of the potentiometer is able to move with the guide 320. The position of the brush is different when the guide 320 moves. The resistance of the potentiometer is switched into the circuit differently, and the displacement sensor 30 has a different measurement value.

The detection sleeve 310 may be cylindrical, rectangular or spindle shaped. In one embodiment, the detection sleeve 310 is shaped as a rectangular parallelepiped to facilitate installation and boring. The material of the detection sleeve 310 may be plastic, rubber or metal. In one embodiment, the material of the detecting sleeve 310 is plastic, so as to reduce the weight of the detecting device 10 and prevent electromagnetic interference.

In one embodiment, the detection sleeve 310 may be open at one end and sealed at the other end. The guide rod 320 passes through the opening and moves axially along the detection sleeve 310. The guide 320 is still within the detection sleeve 310 at the maximum displacement. The shape of the opening may be the same as the shape of the cross-section of the guide 320. In one embodiment, the shape of the opening and the cross-sectional shape of the guide 320 are both circular. The diameter of the opening is not smaller than the diameter of the cross section of the guide 320. The guide rod 320 moves in the detection sleeve 310, and the displacement sensor 30 detects the moving distance of the fixed contact 110 in the main body sleeve 20.

In one embodiment, the displacement sensor 30 further comprises a spring 330. The spring 330 is disposed in the detecting sleeve 310, one end of the spring 330 abuts against the inner wall of the detecting sleeve 310, and the other end of the spring 330 is fixedly connected to the guide rod 320.

The spring 330 is disposed on the detecting sleeve 310 and connected to the guide rod 320. When the main body sleeve 20 moves towards the fixed contact 110, the guide rod 320 pushes the spring 330 to compress, and when the main body sleeve 20 moves away from the fixed contact 110, the spring 330 pushes the guide rod 320 to reset.

In one embodiment, one end of the spring 330 is connected to one end of the detecting sleeve 310 away from the guide rod 320, and the other end of the spring 330 is connected to the guide rod 320. When the main sleeve 20 moves toward the stationary contact 110, the stationary contact 110 pushes the driving portion 40 to slide relative to the main sleeve 20. The stationary contact 110 extends into the main sleeve 20. The driving part 40 slides along the inner wall of the main body sleeve 20 toward the middle of the main body sleeve 20. The driving part 40 pushes the guide 320 to slide toward the inside of the detecting sleeve 310, and the spring 330 is compressed. The displacement sensor 30 detects a distance that the static contact 110 pushes the driving part 40 into the main sleeve 20.

When the main body sleeve 20 moves away from the stationary contact 110, the spring 330 rebounds to push the guide rod 320 away from the detection sleeve 310. The guide rod 320 drives the driving part 40 to reset.

The shape of the spring 330 may be cylindrical, conical, convex and concave, and a small amount of non-circular, etc. There is a certain gap between the coils of the spring 330, and when an external load is applied, the spring 330 contracts and deforms, storing deformation energy. When the external load is removed, the spring 330 returns to its original shape.

In one embodiment, the detection sleeve 310 further comprises at least one fixing tab 311. The fixing piece 311 is fixedly disposed on an outer wall of the detection sleeve 310, and the detection sleeve 310 is fixed on an inner wall of the main body sleeve 20 by the fixing piece 311.

The fixing piece 311 can fix the detecting sleeve 310 to the inner wall of the main body sleeve 20, so that the guide bar 320 is displaced with respect to the detecting sleeve 310. The fixing piece 311 may have a U-shape or a C-shape. The sensing sleeve 310 is fixed to a recess of the fixing piece 311. The fixing plate 311 and the detecting sleeve 310 may be connected by bonding, clamping, or screwing. In one embodiment, the fixing plate 311 is fixed to the detecting sleeve 310 by adhesion, which is convenient and simple. The material of the fixing plate 311 may be plastic, rubber or metal. In one embodiment, the fixing plate 311 is made of plastic, thereby reducing the overall weight of the detecting device 10. The detection sleeve 310 may be directly bonded and fixed to the inner wall of the main sleeve 20.

The fixing piece 311 may be plural. In one embodiment, two fixing pieces 311 are provided, respectively, on the detection sleeve 310, for fixing the detection sleeve 310 to the inner wall of the main sleeve 20.

In one embodiment, the fixing plate 311 is provided with a threaded hole 312, and the main body sleeve 20 is provided with a positioning hole 221 corresponding to the threaded hole 312. Bolts are inserted into the threaded holes 312 and the positioning holes 221 for fixing the detecting sleeve 310 to the inner wall of the main body sleeve 20. The two ends of the fixing piece 311 are respectively provided with the threaded holes 312. The detecting sleeve 310 is installed in the interval between the threaded holes 312, and bolts are inserted into the threaded holes 312 and the corresponding positioning holes 221, so that the detecting sleeve 310 can be fixed on the inner wall of the main body sleeve 20.

The plurality of positioning holes 221 may be respectively formed along the axial direction of the main body sleeve 20, and are used for adjusting the installation position of the detection sleeve 310. When the guide bar 320 is long, the guide bar 320 contacts the driving part 40, so that the driving part 40 cannot be disposed in the main body sleeve 20. At this time, the detecting sleeve 310 is connected to the sealing end of the main sleeve 20 through the positioning hole 221, and the driving part 40 can slide along the inner wall of the main sleeve 20.

In one embodiment, the body sleeve 20 includes a first barrel 210 and a second barrel 220. The driving unit 40 is disposed in the first cylinder 210. The second cylinder 220 is coaxially communicated with the first cylinder 210, and the positioning hole 221 is opened in the second cylinder 220. The bolt is connected to the positioning hole 221, so that the detecting sleeve 310 can be fixed to the second cylinder 220.

In one embodiment, the diameter of the first cylinder 210 is greater than the diameter of the second cylinder 220. The connecting part of the first cylinder 210 and the second cylinder 220 is provided with a chamfer structure, so that the user can be prevented from being scratched. In the above embodiment, the driving part 40 is a cylinder, and the diameter of the driving part 40 is the same as the inner diameter of the first cylinder 210. The driving part 40 can slide in the first cylinder 210, so as to avoid the situation that the displacement of the driving part 40 exceeds the maximum displacement of the displacement sensor 30, and the displacement sensor 30 cannot be reset. The outer surface of the second cylinder 220 may be provided with a thread recessed structure, and grooves may be formed at intervals to facilitate grasping, taking and placing.

Referring to fig. 4 and 5, an inspection cart 60 includes the inspection device 10 according to any of the above embodiments. The detection trolley 60 completely simulates the size of a switch trolley, and only the contact arm part of the switch trolley is replaced by the detection device 10.

Referring also to fig. 6, in one embodiment, the detection cart 60 further includes: a box 610, a feeding device 620 and a control device 630. The detection device 10 is disposed in the box 610. The feeding device 620 is fixedly connected to the box 610, and is configured to drive the box 610 to move. The control device 630 is disposed in the box 610. The control device 630 is electrically connected to the detection device 10 for displaying the distance of the driving portion 40 entering the main body sleeve 20.

The detection device 10 is arranged in the box body 610, and the array arrangement mode and the spacing distance of the detection device 10 are completely consistent with the arrangement of the contact arms of the switch trolley. The arrangement and the spacing distance of the detection devices 10 correspond to the stationary contact 110 of the switch cabinet 100. The number of the detection devices 10 is at least one. In one embodiment, the number of the detection devices 10 is 6, and the detection devices are arranged on the installation surface of the box body 610 in a rectangular array. 3 detection devices 10 are arranged in the transverse row of the rectangular array, 2 detection devices 10 are arranged in the longitudinal row of the rectangular array, and the number and the arrangement mode of the detection devices 10 are the same as those of the contact arms of the switch trolley.

The feeding device 620 can drive the detection trolley 60 to approach or depart from the switch cabinet 100. The maximum feeding amount and the feeding position of the feeding device 620 are completely the same as those of the switch trolley. When the feeding device 620 drives the detecting trolley 60 to approach the switch cabinet 100, the detecting device 10 gradually approaches the fixed contact 110. When the feeding device 620 reaches the maximum feeding amount, the fixed contact 110 reaches the maximum depth position. At this time, the detection device 10 detects the distance that the static contact 110 enters the main body sleeve 20, that is, the distance that the static contact 110 enters the contact arm of the switch trolley. When the distance that the static contact 110 enters the main body sleeve 20 meets the matching distance of the moving contact and the static contact, the contact between the static contact 110 and the moving contact of the switch trolley is good.

In one embodiment, the control device 630 includes: control mainboard 631, energy storage device 632 and display device 633. The control main board 631 is electrically connected to the displacement sensor 30. The energy storage device 632 is electrically connected to the control board 631. The display device 633 is electrically connected to the control main board 631.

The energy storage device 632 is electrically connected to the control motherboard 631 and provides electric energy for the control motherboard 631. The energy storage device 632 may be a lithium battery, a lead battery, or a photovoltaic cell panel. In one embodiment, the energy storage device 632 is a lithium battery. The rated output voltage of the lithium battery is 24V, and the current flow output per hour is 27A. The lithium battery has high energy density, and the weight of the lithium battery is about 1/6-1/5 of a lead-acid product under the same volume. The lithium battery is small in size and light in weight, and is provided in the control device 10, which contributes to reducing the weight of the control device 10.

The display device 633 is electrically connected to the control main board 631 and is configured to display the pressing force of the movable contact 110. The display device 633 can display one or more of parameters, images and curves. The display device 633 is different according to the working principle, and comprises a liquid crystal display screen and a ray tube display screen. In one embodiment, the display device 633 is a liquid crystal display screen capable of clearly displaying parameters, images and curves.

The display device 633 may be disposed in the box 610, or may be disposed in a remote control end. In one embodiment, the display device 633 is disposed at an end of the box 610 away from the detection device 10 for facilitating observation. The display device 633 may be one or more. In one embodiment, the display devices 633 are the same as the detection devices 10, and respectively display the detected displacement distances of the detection devices 10.

In one embodiment, the control device 630 further comprises a charge management device 634. The control device 630 is electrically connected to the energy storage device 632. The charging management device 634 can convert the ac power in the grid into dc power and perform charging management. When the energy storage device 632 is charged to the rated capacity, the charging management device 634 can automatically power off, so as to prevent the energy storage device 632 from being overcharged, and prolong the service life of the energy storage device 634.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A detection device, comprising:

a main body sleeve (20);

a displacement sensor (30) disposed within the body sleeve (20);

the switch cabinet comprises a main body sleeve (20), a driving portion (40) movably arranged in the main body sleeve (20), one end of the driving portion (40) is in contact with the displacement sensor (30), the other end of the driving portion (40) is in contact with a static contact (110) of a switch cabinet (100) to be detected, and when the main body sleeve (20) moves towards the static contact (110), the displacement sensor (30) is used for detecting the distance that the static contact (110) pushes the driving portion (40) to enter the main body sleeve (20).

2. The detection device according to claim 1, wherein the displacement sensor (30) comprises:

a detection sleeve (310) fixedly arranged in the main body sleeve (20);

the guide rod (320) is arranged on the detection sleeve (310), one end of the guide rod (320) is in contact with the driving portion (40), when the main body sleeve (20) moves towards the static contact (110), the driving portion (40) pushes the guide rod (320) to move axially in the detection sleeve (310), and the moving distance of the static contact (110) in the main body sleeve (20) is detected through the moving distance of the guide rod (320) in the detection sleeve (310).

3. The detection device according to claim 2, wherein the displacement sensor (30) further comprises:

the spring (330) is arranged in the detection sleeve (310), one end of the spring (330) abuts against the inner wall of the detection sleeve (310), and the other end of the spring is fixedly connected with the guide rod (320).

4. The sensing device of claim 3, wherein the sensing sleeve (310) further comprises:

at least one fixing piece (311) fixedly arranged on the outer wall of the detection sleeve (310), wherein the detection sleeve (310) is fixed on the inner wall of the main body sleeve (20) through the fixing piece (311).

5. The detecting device according to claim 4, characterized in that the fixing plate (311) is provided with a threaded hole (312), and the main body sleeve (20) is provided with a positioning hole (221) corresponding to the threaded hole (312).

6. The detection device according to claim 5, characterized in that the main body sleeve (20) comprises:

a first cylinder (210), wherein the driving part (40) is arranged on the first cylinder (210);

the second cylinder (220) is coaxially communicated with the first cylinder (210), and the positioning hole (221) is formed in the second cylinder (220).

7. The testing device of claim 6, wherein the diameter of the first cylinder (210) is greater than the diameter of the second cylinder (220).

8. The detecting device according to claim 6, wherein the driving portion (40) is a cylinder, and the diameter of the driving portion (40) is the same as the inner diameter of the first cylinder (210).

9. An inspection trolley, characterized in that it comprises an inspection device (10) according to any one of claims 1-8.

10. The inspection trolley according to claim 9, further comprising:

a box body (610), wherein the detection device (10) is arranged on the box body (610);

the feeding device (620) is fixedly connected with the box body (610) and is used for driving the box body (610) to move;

and the control device (630) is arranged on the box body (610), and the control device (630) is electrically connected with the detection device (10) and is used for displaying the distance of the driving part (40) entering the main sleeve (20).