Relay detection device

Abstract

The invention relates to the technical field of relays, in particular to a relay detection device which comprises a shell, a mounting assembly, a protection assembly and a detection assembly. The protection assembly comprises a first protection part, a second protection part and a driving part, the driving part is connected with the first protection part and the second protection part, the first protection part is arranged below the mounting assembly, and the second protection part is arranged above the mounting assembly; the driving part drives the first protection part to deform, supports and protects the lower portion of the installation assembly where the to-be-detected relay is placed, drives the second protection part to deform, and supports and protects the periphery of the to-be-detected relay. The first protection part and the second protection part are respectively arranged below and above the mounting assembly, and are matched with the driving part for deformation, so that the bottom and the periphery of the relay can be supported and protected in all directions in the detection process, and the damage to the relay caused by external force collision and vibration is effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of relays, and particularly relates to a relay detection device. BACKGROUND

[0002] As a core electrical component in control and protection systems, relays have a wide and important application in the fields of power systems, communication networks, traffic signal control, industrial automatic production lines, etc. In the working process, relays realize the on-off of circuits through electromagnetic or electronic control, and the action accuracy and stability thereof are directly related to the safe and reliable operation of the entire system. In order to ensure that the relays can meet the design requirements before being put into use and continuously maintain excellent performance during operation, it is usually necessary to perform function detection and performance testing on the relays before leaving the factory, during regular maintenance or fault repair.

[0003] Most of the existing relay detection devices are open or semi-open structures, and the relays to be detected are directly exposed to the external environment during the testing process, which is easy to be contaminated by dust, metal chips, moisture and other impurities, thereby affecting the working performance of the internal contacts and coils. At the same time, in the detection site, the relays may also suffer accidental mechanical collision or external impact, resulting in shell damage, pin deformation, and even abnormal detection data. In addition, for some detection devices, the protection mechanism is a fixed structure, which cannot effectively protect different models or sizes of relays, which not only reduces the pertinence of protection, but also cannot provide comprehensive support to the relays and their installation components during the detection process. SUMMARY

[0004] (I) Invention purpose

[0005] The purpose of the present application is to provide a relay detection device which can provide all-round support and protection to the bottom and periphery of the relay during the detection process by setting a first protection part and a second protection part below and above the installation assembly respectively, and cooperating with the driving part to deform, thereby effectively avoiding damage to the relay caused by external collision and vibration.

[0006] (II) Technical solution

[0007] To solve the above problems, the present application provides a relay detection device, comprising: a shell, an installation assembly, a protection assembly and a detection assembly.

[0008] The installation assembly is arranged in the shell, and is used for placing a relay to be detected; the detection assembly is arranged outside the shell, and is used for detecting the relay to be detected together with the relay to be detected.

[0009] The protection assembly comprises a first protection part, a second protection part and a driving part, the first protection part and the second protection part are arranged in the shell, the driving part is arranged outside the shell, the driving part is connected with the first protection part and the second protection part, the first protection part is arranged below the mounting assembly, and the second protection part is arranged above the mounting assembly.

[0010] The driving part drives the first protection part to deform, supports and protects the mounting assembly below which the relay to be detected is placed, and drives the second protection part to deform, supports and protects the relay to be detected around.

[0011] In another aspect of the present application, preferably, the mounting assembly comprises a connecting rod and a bearing plate, the connecting rod is connected with the inner wall of the shell, and a plurality of connecting rods are arranged in an interlaced arrangement in the same horizontal plane to form a first plane, and the bearing plate is connected with the first plane, and the bearing plate is used for placing the relay to be detected.

[0012] In another aspect of the present application, preferably, the first protection part is arranged as a first air bag, the first air bag is arranged below the first plane of the shell, the first air bag is arranged on the inner side wall of the shell, and the driving part drives the first air bag to expand or shrink to deform to support and protect the relay to be detected below the bearing plate.

[0013] In another aspect of the present application, preferably, the second protection part is arranged as a second air bag, the second air bag is arranged above the first plane of the shell, the second air bag is arranged on the inner side wall of the shell, and the driving part drives the second air bag to expand or shrink to deform to support and protect the relay to be detected around the bearing plate.

[0014] In another aspect of the present application, preferably, the driving part comprises a pressure bag and a conveying pipe, the pressure bag is communicated with the first air bag and the second air bag through the conveying pipe, the pressure bag is arranged as a compressible elastic cavity structure, and is used for conveying gas to the first air bag and the second air bag when being pressed.

[0015] In another aspect of the present application, preferably, the driving part further comprises an air inlet pipe and a one-way valve, the pressure bag is communicated with the air inlet pipe, the one-way valve is arranged in the air inlet pipe, and the one-way valve is used for limiting the gas flowing from the first air bag and the second air bag into the pressure bag.

[0016] In another aspect of the present application, preferably, the detection assembly comprises a voltage detector, a current detector and a connecting lead wire, the voltage detector and the current detector are arranged outside the shell, and the voltage detector and the current detector are connected with the relay to be detected through the connecting lead wire.

[0017] In another aspect of the present application, preferably, the detection assembly further comprises a buzzer connected with the voltage detector and the current detector, and the buzzer gives an alarm according to the detection results of the voltage detector and the current detector.

[0018] In another aspect of the present application, preferably, the shell comprises a box door, an electromagnet and a password lock; the box door is arranged at the top of the shell, the electromagnet is arranged at the bottom of the box door, and the password lock is arranged outside the shell and connected with the electromagnet, and the password lock controls the magnetic force of the electromagnet by energizing and de-energizing the electromagnet.

[0019] In another aspect of the present application, preferably, the shell further comprises a fixing sheet and a threaded fixing hole; the fixing sheet is arranged at the bottom outside the shell, and the threaded fixing hole is arranged on the fixing sheet, and the shell is connected with the outside through the fixing sheet and the threaded fixing hole.

[0020] (III) Beneficial effects

[0021] The above technical solutions of the present application have the following beneficial technical effects:

[0022] The first protection part is arranged below the installation assembly, the second protection part is arranged above the installation assembly, and the air bag structure is deformed by cooperating with the driving part, so that the bottom and the periphery of the relay are supported and protected in all directions, and damage to the relay caused by external force collision and vibration during detection is effectively avoided. The air bag structure has good flexibility and compressibility, can automatically fit according to the size and position of the relay, improves the pertinence and adaptability of protection, and overcomes the defect that the traditional fixed protection structure cannot adapt to different models of relays. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a whole structure side view of one embodiment of the present application;

[0024] Figure 2 is another whole structure side view of one embodiment of the present application;

[0025] Figure 3 is a whole structure cross-sectional view of one embodiment of the present application;

[0026] Figure 4 is a structure schematic view of the box door of one embodiment of the present application;

[0027] Figure 5 is a driving part structure schematic view of one embodiment of the present application;

[0028] Reference signs:

[0029] 1: housing, 110: box door, 120: electromagnet, 130: password lock, 140: fixing piece, 150: threaded fixing hole,

[0030] 2: mounting assembly, 210: connecting rod, 220: bearing plate,

[0031] 3: protection assembly, 310: first protection part, 320: second protection part, 330: driving part, 331: pressure bag, 332: delivery pipe, 333: air inlet pipe, 334: one-way valve,

[0032] 4: detection assembly, 410: voltage detector, 420: current detector, 430: connecting wire, 440: buzzer. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions, and advantages of the present application clearer, further detailed description will be made to the present application with reference to the specific embodiments and the accompanying drawings. It should be understood that the description is only exemplary, but not to limit the scope of the present application. In addition, in the following description, the description of the well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0034] The structural schematic diagrams according to the embodiments of the present application are shown in the accompanying drawings. These drawings are not drawn to scale, in which some details are enlarged for the purpose of clarity, and some details can be omitted. The shapes of various regions, layers, and the relative size and position relationship therebetween shown in the drawings are only exemplary, and in practice, they can be deviated due to manufacturing tolerance or technical limitation, and the regions / layers with different shapes, sizes, and relative positions can be additionally designed by the person skilled in the art according to the actual needs.

[0035] Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without making creative efforts are within the scope of protection of the present application.

[0036] In the description of the present application, it should be noted that the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0037] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0038] The present application will be described in more detail with reference to the accompanying drawings. In each of the drawings, the same elements are denoted by like reference numerals for the purpose of clarity. Each part in the drawings is not drawn to scale.

[0039] Embodiment one

[0040] A relay detection device, Figure 1 The overall structure side view of one embodiment of the present application is shown; Figure 2 The overall structure of another side view of one embodiment of the present application is shown; Figure 3 The overall structure of one embodiment of the present application is shown in cross-section; as Figure 1 , Figure 2 and Figure 3 shown, comprising: a housing 1, mounting assembly 2, protection assembly 3 and detection assembly 4; the housing 1 is a closed structure, made of sheet metal, for providing a stable installation space for internal components and external environmental protection. The housing 1 is used to provide a stable installation space for the internal mounting assembly, protection assembly and detection assembly, and to form an effective barrier to dust, moisture and mechanical impact from the outside. In this embodiment, the housing 1 includes a box door 110, an electromagnet 120 and a password lock 130; Figure 4 The structure of the box door of one embodiment of the present application is shown, as Figure 4 shown, the box door 110 is provided on the top of the housing 1, and an observation window can be provided on the box door 110, the electromagnet 120 is provided on the bottom of the box door 110, the password lock 130 is provided on the outside of the housing 1, the password lock 130 is connected with the electromagnet 120, the password lock 130 controls the magnetic force of the electromagnet 120 by energizing and de-energizing the electromagnet 120. The password lock 130 is installed on the outer side of the housing 1, and the output end is electrically connected with the power control end of the electromagnet 120, the energization and de-energization of the electromagnet 120 is controlled by inputting the correct password signal, the opening and closing control of the magnetic force is realized, the security protection purpose of preventing unauthorized personnel from opening the box door is achieved. The housing 1 further comprises a fixing plate 140 and a threaded fixing hole 150; the fixing plate 140 is provided on the bottom of the housing 1, the threaded fixing hole 150 is provided on the fixing plate 140, and the housing 1 is connected with the outside through the fixing plate 140 and the threaded fixing hole 150. In order to facilitate the fixation of the housing 1 with the external detection rack or workbench, the fixing plate 140 is provided on the bottom of the housing 1. The fixing plate 140 is a metal structure plate, which is integrally welded or screwed with the bottom plate of the housing 1, and is located on both sides or four corners of the bottom edge of the housing 1. The threaded fixing holes 150 are evenly distributed on the fixing plate 140, which can adopt standard thread specifications, so as to reliably fix the housing 1 on the external bearing structure by bolts. Not only the stability and shock resistance of the housing 1 during detection are ensured, but also the subsequent maintenance and disassembly are facilitated.

[0041] The mounting assembly 2 is arranged in the shell 1, and is used for placing a relay to be detected. In the embodiment, the mounting assembly 2 comprises connecting rods 210 and a bearing plate 220. The connecting rods 210 are connected to the inner wall of the shell 1, and a plurality of the connecting rods 210 are arranged in a staggered manner in the same horizontal plane to form a first plane. The bearing plate 220 is connected to the first plane, and is used for placing the relay to be detected. The connecting rods 210 are metal rods or high-strength alloy rod members, so as to ensure sufficient rigidity and bearing capacity. One end of each connecting rod 210 is fixedly connected to the inner wall of the shell 1 by welding, threaded connection or bolt fixation, and the other end supports the bearing plate 220. The plurality of connecting rods 210 are arranged in a staggered manner in the same horizontal plane, and are spaced from each other, so as to reduce the overall weight and facilitate the passage of the protective components and the electrical connection wires below. The plane formed by the above-mentioned staggered arrangement is referred to as the first plane, and the first plane is the mounting reference plane of the bearing plate 220. The material of the bearing plate 220 can be a metal plate, a stainless steel plate or a high-strength insulating plate. The shape and size of the bearing plate 220 are designed according to the shape of the relay to be detected, so as to ensure that the relay can be stably placed and does not slide. The bottom surface of the bearing plate 220 is fixedly connected to the top end of the connecting rod 210, and the fixing mode can adopt threaded fastening, clamping groove fitting or welding structure, so as to ensure the stability and anti-vibration performance of the bearing plate during detection.

[0042] The detection assembly 4 is arranged outside the shell 1, and is used for detecting the relay to be detected. In the embodiment, the detection assembly 4 comprises a voltage detector 410, a current detector 420 and a connecting wire 430. The voltage detector 410 and the current detector 420 are arranged outside the shell 1. The function of the detection assembly 4 is to monitor the working state and performance parameters of the relay to be detected in real time, so as to determine whether the relay to be detected meets the use requirements.

[0043] The voltage detector 410 and the current detector 420 are connected to the relay to be detected through the connecting wire 430. The voltage detector 410 is used for measuring the terminal voltage of the relay to be detected in real time during the working process. The range of the voltage detector 410 can be selected according to the rated voltage range of the relay. The voltage detector 410 and the current detector 420 are both installed on the instrument panel outside the shell 1, and are fixed by screws or clamped by buckles, so that the detection results can be directly read by the operator. The connecting wire 430 is an insulating sheath wire. The internal conductor adopts a multi-strand copper wire structure to improve the flexibility and conductivity. One end of the connecting wire 430 is connected to the input end of the voltage detector 410 and the current detector 420, and the other end is provided with a pluggable terminal or a clamping joint, which is used for quick connection with the input and output terminals of the relay to be detected, so as to ensure the reliable electrical connection and reduce the contact resistance.

[0044] The detection assembly 4 further comprises a buzzer 440 connected with the voltage detector 410 and the current detector 420, which gives an alarm according to the detection results of the voltage detector 410 and the current detector 420. The buzzer 440 is electrically connected with the output ends of the voltage detector 410 and the current detector 420 through wires. When the voltage detector 410 or the current detector 420 detects that the working voltage or current of the relay to be detected exceeds the preset safety threshold, the buzzer 440 will immediately give an audible alarm to remind the operator to handle the abnormal situation in time.

[0045] The protection assembly 3 comprises a first protection part 310, a second protection part 320 and a driving part 330. The first protection part 310 and the second protection part 320 are arranged in the housing 1 and are used to provide physical protection for the relay to be detected and its bearing structure during the detection process. The driving part 330 is arranged outside the housing 1 and is connected with the first protection part 310 and the second protection part 320. The first protection part 310 is arranged below the mounting assembly 2, and the second protection part 320 is arranged above the mounting assembly 2. The driving part 330 is arranged outside the housing 1 and is connected with the first protection part 310 and the second protection part 320 through mechanical transmission or flexible connecting members to realize synchronous or independent driving of the protection parts.

[0046] The driving part 330 drives the first protection part 310 to deform and supports and protects the mounting assembly 2 below which the relay to be detected is placed. The driving part 330 drives the second protection part 320 to deform and supports and protects the relay to be detected around. The first protection part 310 is arranged below the mounting assembly 2 and can adopt the forms of a metal elastic sheet, a telescopic supporting rod, a flexible partition plate or a hinged protection plate, etc. The first protection part 310 can deform under the action of the driving part 330, for example, is lifted up, is bent or is elongated, so as to form a supporting surface at the bottom of the mounting assembly 2 and prevent the mounting assembly from shaking due to external force. The second protection part 320 is arranged above the mounting assembly 2 and surrounds the mounting assembly 2. The second protection part 320 can adopt the structures of a flexible fence, a telescopic sheath, a folding protection cover or a multi-section sliding protection plate, etc. Under the driving of the driving part 330, the second protection part 320 can be folded inward to fit the shape of the relay, so as to fix the position of the relay during the detection process and prevent the relay from toppling, displacement or accidental collision. After the detection is completed, the second protection part 320 can be unfolded outward to release space and facilitate the taking out and placing of the relay.

[0047] In this embodiment, the first protection part 310 is provided as a first air bag, which is arranged below the first plane of the shell 1 and on the inner side wall of the shell 1. The driving part 330 drives the first air bag to expand or contract, so as to support and protect the relay to be detected on the bearing plate 220. The first air bag is made of flexible material, such as high-strength rubber, polyurethane synthetic material or other composite materials with good elasticity and wear resistance, and can withstand repeated inflation and deflation without being easily damaged. The first air bag can realize expansion and contraction deformation through the gas source provided by the driving part 330. When the driving part 330 starts the inflation function, the first air bag rapidly expands to a preset shape to form a stable and elastic supporting surface for supporting and protecting the bottom of the relay to be detected installed on the bearing plate 220, preventing damage caused by shaking or vibration during detection.

[0048] The second protection part 320 is provided as a second air bag, which is arranged above the first plane of the shell 1 and on the inner side wall of the shell 1. The driving part 330 drives the second air bag to expand or contract, so as to support and protect the relay to be detected on the bearing plate 220. The second air bag is also made of flexible high-elasticity material, arranged on the inner side wall of the shell 1 above the first plane formed by the mounting assembly 2. The second air bag realizes inflation and deflation through the gas source of the driving part 330. At the beginning, the second air bag inflates and expands to wrap and fit around the relay to be detected on the bearing plate 220, forming a soft and rigid protective barrier to effectively prevent displacement, tilting and damage caused by external mechanical impact during detection. The inflated air bag can also buffer the vibration from the external environment, improving the stability and safety of detection.

[0049] Figure 5 The driving part structure diagram of one embodiment of the application is shown in FIG. 3. Figure 5 As shown in FIG. 3, the driving part 330 includes a pressure bag 331 and a conveying pipe 332. The pressure bag 331 is communicated with the first air bag and the second air bag through the conveying pipe 332. The pressure bag 331 is provided as a compressible elastic cavity structure for conveying gas to the first air bag and the second air bag when compressed. The pressure bag 331 is made of elastic material and constitutes a compressible elastic cavity structure, which can be deformed under external force to realize compression and release of gas through the change of internal cavity volume. The pressure bag 331 is communicated with the first air bag 310 and the second air bag 320 through the conveying pipe 332 to form a gas transmission path. When the pressure bag 331 is compressed, the internal gas is extruded and conveyed to the first air bag and the second air bag through the conveying pipe 332 to make them expand and deform, thereby realizing the support and protection of the relay to be detected.

[0050] The driving part 330 further comprises an air inlet pipe 333 and a one-way valve 334, the pressure bag 331 communicates with the air inlet pipe 333, and the one-way valve 334 is arranged in the air inlet pipe 333, and the one-way valve 334 is used to limit the gas flowing from the first air bag and the second air bag into the pressure bag 331. The air inlet pipe 333 is used to guide the external gas source into the inside of the pressure bag 331 to keep the gas in the pressure bag sufficient. The one-way valve 334 is installed in the inside of the air inlet pipe 333 and has a one-way conduction function, which can limit the gas to flow into the pressure bag only from the direction of the air inlet pipe, and prevent the gas from flowing back to the air inlet pipe or other gas source passages.

[0051] The present application realizes all-around support and protection for the bottom and the periphery of the relay by arranging the first protection part below the mounting assembly, arranging the second protection part above it, and adopting the air bag structure to cooperate with the driving part to deform, effectively avoiding the damage to the relay caused by external force collision and vibration in the detection process. The air bag structure has good flexibility and compressibility, can realize automatic fitting according to the size and position of the relay, improves the pertinence and adaptability of protection, and overcomes the defect that the traditional fixed protection structure cannot adapt to different models of relays. The driving part adopts the air path system composed of the pressure bag, the conveying pipe, the air inlet pipe and the one-way valve, which has simple structure, rapid response, can conveniently control the inflation and deflation of the air bag, and is convenient for operation and maintenance. The air bag has excellent buffering and damping performance in the pressure state, can effectively absorb external impact energy, and reduce the influence of vibration on the detection accuracy.

[0052] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all variations and modifications falling within the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.

[0053] In the above description, the patterning, etching and other technical details of each layer are not described in detail. However, those skilled in the art should understand that the layers, regions and the like with the required shape can be formed by various means in the prior art. In addition, those skilled in the art can also design methods that are not exactly the same as the methods described above in order to form the same structure.

[0054] The application has been described above with the reference to embodiments. However, these embodiments are merely meant for illustrative purposes and are not meant to limit the scope of the application. The scope of the application is defined by the appended claims and their equivalents. Various substitutions and modifications could be made by those skilled in the art without departing from the scope of the application, and it is intended that all such substitutions and modifications be included within the scope of the application.

[0055] Although the embodiments of the present application have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application.

[0056] Obviously, the above-described embodiments are only examples for clearly illustrating the present application and are not intended to limit the embodiments. Based on the above description, one of ordinary skill in the art can make other different forms of changes or modifications. Here, it is not necessary and also impossible to enumerate all the embodiments. The obvious changes or modifications derived from the above are still within the protection scope of the present application.

Claims

1. A relay detection device, characterized in that, The utility model relates to a relay detection device, including: The shell (1), installation component (2), protection component (3) and detection component (4); The installation component (2) is arranged in the shell (1), and the installation component (2) is used to place the relay to be detected;The detection component (4) is arranged outside the shell (1), and the detection component (4) is used to detect the relay to be detected with the relay to be detected; The protection component (3) includes first protection part (310), second protection part (320) and drive part (330), the first protection part (310) and second protection part (320) are arranged in the shell (1), the drive part (330) is arranged outside the shell (1), the drive part (330) is connected with the first protection part (310) and second protection part (320), the first protection part (310) is arranged below the installation component (2), and the second protection part (320) is arranged above the installation component (2); The drive part (330) drives the first protection part (310) to deform, supports and protects the installation component (2) below the relay to be detected, and the drive part (330) drives the second protection part (320) to deform, supports and protects the relay to be detected around.

2. The relay detection apparatus according to claim 1, characterized by The installation component (2) includes connecting rod (210) and bearing plate (220), the connecting rod (210) is connected with the inner wall of the shell (1), and a plurality of connecting rods (210) are arranged in the same horizontal plane in staggered arrangement, to form a first plane, the bearing plate (220) is connected with the first plane, and the bearing plate (220) is used to place the relay to be detected.

3. The relay detection apparatus according to claim 2, characterized by The first protection part (310) is arranged as a first air bag, the first air bag is arranged below the first plane of the shell (1), the first air bag is arranged on the inner side wall of the shell (1), and the drive part (330) drives the first air bag to swell or shrink to deform, to support and protect the relay to be detected below the bearing plate (220).

4. The relay detection apparatus according to claim 3, characterized by The second protection part (320) is arranged as a second air bag, the second air bag is arranged above the first plane of the shell (1), the second air bag is arranged on the inner side wall of the shell (1), and the drive part (330) drives the second air bag to swell or shrink to deform, to support and protect the relay to be detected around the bearing plate (220).

5. The relay detection apparatus according to claim 4, characterized by The drive part (330) includes pressure bag (331) and delivery pipe (332), the pressure bag (331) is communicated with the first air bag and the second air bag through the delivery pipe (332), the pressure bag (331) is arranged as a compressible elastic cavity structure, and is used to deliver gas to the first air bag and the second air bag when being pressed.

6. The relay detection apparatus according to claim 5, wherein The driving part (330) further comprises an air inlet pipe (333) and a one-way valve (334), the pressure bag (331) communicates with the air inlet pipe (333), the one-way valve (334) is arranged in the air inlet pipe (333), and the one-way valve (334) is used for limiting gas from flowing into the pressure bag (331) from the first air bag and the second air bag.

7. The relay detection apparatus according to claim 1, wherein The detection assembly (4) comprises a voltage detector (410), a current detector (420) and a connecting wire (430); the voltage detector (410) and the current detector (420) are arranged outside the shell (1), and the voltage detector (410) and the current detector (420) are connected with a relay to be detected through the connecting wire (430).

8. The relay detection apparatus according to claim 7, wherein The detection assembly (4) further comprises a buzzer (440), the buzzer (440) is connected with the voltage detector (410) and the current detector (420), and the buzzer (440) gives an alarm according to the detection results of the voltage detector (410) and the current detector (420).

9. The relay detection apparatus according to claim 1, wherein The shell (1) comprises a box door (110), an electromagnet (120) and a password lock (130); the box door (110) is arranged at the top of the shell (1), the electromagnet (120) is arranged at the bottom of the box door (110), the password lock (130) is arranged outside the shell (1), the password lock (130) is connected with the electromagnet (120), and the password lock (130) controls the magnetic force of the electromagnet (120) by energization and de-energization of the electromagnet (120).

10. The relay detection apparatus according to claim 9, wherein The shell (1) further comprises a fixed sheet (140) and a threaded fixing hole (150); the fixed sheet (140) is arranged at the bottom outside the shell (1), the threaded fixing hole (150) is arranged on the fixed sheet (140), and the shell (1) is connected with the outside through the fixed sheet (140) and the threaded fixing hole (150).

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