Relay protection testing device and testing method thereof

Abstract

The invention relates to the technical field of power system relay protection, and discloses a relay protection test device and a test method thereof.The relay protection test device comprises an installation unit, a limiting unit and a locking unit, the installation unit comprises a protection shell, placement shells are fixedly installed on the periphery of the protection shell, and the four placement shells are circumferentially arranged; and mounting shells are fixedly mounted on the placement shells, and lower rectangular notches and upper rectangular notches are formed in the opposite side walls of the four placement shells and the four mounting shells correspondingly. According to the device, when a moving plate vertically moves upwards, a fixing rod can be driven to vertically move downwards, so that a limiting assembly can be driven to move through the fixing rod until one end of a turnover assembly is attached to a protective shell, and the limiting assembly can clamp and limit the periphery of a relay body; and meanwhile, the cover plate is covered to drive the locking unit to limit the turnover mechanism, so that the relay body is ensured not to shake.

Description

Technical Field

[0001] The invention belongs to the technical field of relay protection of electric power system, and in particular, relates to a relay protection test device and a test method thereof. Background Art

[0002] In the power system, relay protection devices are important equipment to ensure the safe operation of power equipment. In order to ensure the reliability and accuracy of relay protection devices, they need to be tested regularly. Traditional relay protection testing methods mainly use manual testing, which has low testing efficiency and poor accuracy, and it is difficult to meet the high requirements of modern power systems for relay protection devices.

[0003] However, when the existing relay is tested, when it is shaken, the relay body will shake, which may cause errors during the test of the relay, making it impossible to determine whether the relay is damaged.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] A relay protection test device, comprising an installation unit, a limit unit and a locking unit, wherein the installation unit comprises a protective shell, wherein a placement shell is fixedly installed around the protective shell, wherein four placement shells are arranged in a circle, and an installation shell is fixedly installed on the placement shell, wherein a lower rectangular notch and an upper rectangular notch are respectively provided on one side wall opposite to the four placement shells and the four installation shells, wherein two mutually symmetrical rectangular grooves are respectively provided on the upper side wall of the protective shell, wherein a special-shaped notch is provided at the bottom of each rectangular groove, wherein a placement plate is provided in the inner cavity of the protective shell, a cover plate is provided above the protective shell, and a sliding door is provided above the cover plate, wherein movable plates are respectively provided at the bottom of the inner cavities of the four installation shells, and a placement notch is provided on the placement plate, wherein a relay body is placed in the inner cavity of the placement notch;

[0007] The limiting unit includes four flip assemblies and a limiting assembly, wherein the four flip assemblies are respectively used to drive the moving plate to move, and when the moving plate moves, the limiting assembly is used to limit the relay body placed above the placement plate;

[0008] The locking unit includes a card assembly, and the card assembly includes a plurality of plug-in rods, each of the plug-in rods is fixedly installed with a fixed block at one end away from the flip assembly, a movable rod is arranged above each of the fixed blocks, and a third sliding mechanism is arranged on the two opposite side walls of each of the plug-in rods, and the third sliding mechanism includes a third slide groove, and the third slide grooves are arranged on the two opposite side walls of the special-shaped groove between each other, and a third slider is slidably installed in the inner cavity of each of the third slide grooves, and each of the third sliders is symmetrical with each other, and the third sliding mechanism is used to assist the plug-in rod to move, and each of the plug-in rods is used to position the flip assembly.

[0009] As a preferred embodiment of the present invention, two mutually symmetrical first slide grooves are respectively opened around the inner cavity of the protective shell, and a first slider is slidably installed in the inner cavity of each first slide groove, and the other end of each first slider is connected to a placement plate.

[0010] As a preferred embodiment of the present invention, the flip assembly includes four flip plates, and the four flip plates are respectively arranged in the inner cavity of the placement shell, a rotating rod is fixedly installed in the middle of each flip plate, and first bearings are respectively arranged at both ends of each rotating rod, and each of the first bearings is respectively installed on the opposite side walls of the inner cavity of the placement shell, and each of the rotating rods is provided with plug-in slots at both ends, and each of the plug-in slots is respectively matched with the plug-in rod.

[0011] As a preferred embodiment of the present invention, limit blocks are arranged above the four flip plates, and the four limit blocks are respectively installed on the inner wall of the protective shell. First torsion springs are respectively arranged at both ends of the four flip plates, and each of the first torsion springs is respectively arranged on the rotating rod, and the opposite ends of each first torsion spring are respectively arranged on the first bearing.

[0012] As a preferred embodiment of the present invention, the two opposite side walls of each movable plate are respectively provided with a second sliding mechanism, the second sliding mechanism includes a plurality of second sliding grooves, each of the second sliding grooves is respectively opened on the two opposite side walls of the inner cavity of the mounting shell, a second slider is slidably installed in the inner cavity of each second sliding groove, the two opposite side walls of each second slider are connected to the movable plate, and a fixed rod is fixedly installed above each movable plate.

[0013] As a preferred embodiment of the present invention, the limit assembly includes four rotating rods, and second bearings are provided at both ends of the four rotating rods. Each of the second bearings is installed in pairs on the two opposite side walls of the inner cavity of the installation shell. A turntable is fixedly installed on the four rotating rods, and a second torsion spring is provided on one side wall of the turntable. Each of the second torsion springs is arranged on the rotating rod, and each of the second torsion springs is respectively arranged on the second bearing at one end away from the turntable. A fixing plate is fixedly installed on one side wall of each turntable away from the second torsion spring, and a fixing rod is fitted under the fixing plate.

[0014] As a preferred embodiment of the present invention, the four rotating rods are each provided with a guide slot, and the four guide slots are symmetrical with each other. The inner cavities of the four guide slots are each slidably installed with a guide slider, and the other end of the guide slider is fixedly connected to a guide sleeve, each of the guide sleeves is respectively sleeved on the rotating rod, and each guide sleeve is fixedly connected to two symmetrical connecting rods at one end away from the turntable, and each connecting rod is movably passed through the mounting shell and the side wall of the protective shell, and each connecting rod is fixedly connected to a positioning plate at one end away from the guide sleeve, and each guide sleeve has two symmetrical guide rods movably passed through, and both ends of each guide rod are respectively fixedly connected to the mounting shell.

[0015] As a preferred embodiment of the present invention, each of the movable rods is movably connected to a movable rod at one end away from the fixed block, each of the movable rods is movably passed through a rectangular groove, two mutually symmetrical circular limit plates are fixedly installed in each of the rectangular grooves, and a movable rod is movably passed through the inner cavity of the circular limit plate.

[0016] As a preferred embodiment of the present invention, a mounting plate is fixedly installed on each of the moving rods, each of the mounting plates is respectively located between two return-shaped limit plates, a return spring is fixedly connected to the bottom of each mounting plate, each of the return springs is respectively sleeved on the moving rod, and the other end of each return spring is respectively fixedly connected to the return-shaped limit plate.

[0017] A relay protection test method, the steps are as follows:

[0018] Step 1: First, the staff places the relay body on the placement plate so that the bottom of the relay body can be located in the inner cavity of the placement slot opened on the placement plate. When the placement is completed, the placement plate can move vertically downward under the gravity of the relay body and with the assistance of the first slide groove and the first slider, thereby squeezing the flip assembly to rotate;

[0019] Step 2: When the flip assembly flips, it can pass through the lower rectangular notch and the upper rectangular notch opened on the placement shell and the installation shell, so it can squeeze the movable plate to move vertically upward with the assistance of the second slide groove and the second slider. When the movable plate moves vertically upward, it can drive the fixed rod to move vertically downward, so the limit assembly can be driven to move by the fixed rod until one end of the flip assembly fits the protective shell, and the limit assembly can clamp and limit the relay body around.

[0020] Step 3: At this time, the staff covers the cover plate, so that the cover plate can squeeze the moving rod to move vertically downward. When the moving rod moves vertically downward, it can drive the movable rod to push the fixed block to drive the plug-in rod to move horizontally with the assistance of the third slide groove and the third slider. Therefore, the plug-in rod can be plugged into the plug-in slot cavity opened on the side wall of the rotating rod after rotation, thereby limiting the rotating rod. Therefore, to a certain extent, it is avoided that the shaking causes the flip plate to rotate slightly, thereby causing the relay body on which the plate is placed to collide;

[0021] Step 4: When testing is required, the staff opens the sliding door on the cover plate, so that they can test the top of the relay body through the test equipment to see if it is damaged.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] According to the present invention, when the flip assembly flips, it can pass through the lower rectangular notch and the upper rectangular notch opened on the placement shell and the installation shell, so that the movable plate can be squeezed to move vertically upward with the assistance of the second slide groove and the second slide block. When the movable plate moves vertically upward, it can drive the fixed rod to move vertically downward, so the limit assembly can be driven to move by the fixed rod until one end of the flip assembly is in contact with the protective shell. The limit assembly can clamp and limit the relay body around, and at the same time, by covering the cover plate, it drives the locking unit to limit the flip mechanism, thereby ensuring that the relay body will not shake.

[0024] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In the attached picture:

[0026] Figure 1 It is a three-dimensional structural schematic diagram of a relay protection test device and a test method thereof;

[0027] Figure 2 A schematic diagram of a protective shell structure of a relay protection test device and a test method thereof;

[0028] Figure 3 A schematic diagram of the cross-sectional structure of a protective shell of a relay protection test device and a test method thereof;

[0029] Figure 4 A schematic diagram of the top view structure of a protective shell of a relay protection test device and a test method thereof;

[0030] Figure 5 It is a schematic diagram of the cross-sectional structure of a placement shell and an installation shell of a relay protection test device and a test method thereof;

[0031] Figure 6 A schematic diagram of the inner cavity structure of an installation housing of a relay protection test device and a test method thereof;

[0032] Figure 7 A schematic diagram of the cross-sectional structure of the protective shell side wall of a relay protection test device and a test method thereof;

[0033] Figure 8 It is a schematic diagram of the cross-sectional and top-view structure of a protective shell of a relay protection test device and a test method thereof;

[0034] Fig. 9 A relay protection test device and a test method thereof Figure 8 Enlarged structural diagram at A in the middle.

[0035] In the figure:

[0036] 100, mounting unit; 101, protective shell; 1011, cover plate; 1012, sliding door; 1013, first slide groove; 1014, first slider; 102, placement shell; 1021, installation shell; 1022, lower rectangular notch; 1023, upper rectangular notch; 103, placement plate; 1031, placement notch; 104, rectangular groove; 1041, special-shaped notch; 1042, round-shaped limit plate;

[0037] 200, limit unit; 201, flip plate; 2011, rotating rod; 2012, first torsion spring; 2013, first bearing; 2014, plug-in notch; 2016, limit block; 202, moving plate; 2021, second slide groove; 2022, second slider; 2023, fixed rod; 203, rotating rod; 2031, turntable; 2032, second torsion spring; 2033, second bearing; 2034, fixed plate; 2035, guide slide groove; 2036, guide sleeve; 2037, connecting rod; 2038, positioning plate; 2039, guide rod;

[0038] 400, locking unit; 401, moving rod; 4011, mounting plate; 4012, return spring; 4013, movable rod; 402, fixing block; 4021, plug-in rod; 4022, third slide groove; 4023, third slide block. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0040] Embodiment 1:

[0041] like Figures 1 to 9As shown, a relay protection test device includes an installation unit 100, a limit unit 200 and a locking unit 400. The installation unit 100 includes a protective shell 101. The protective shell 101 is fixedly installed with a placement shell 102 around it. The four placement shells 102 are circumferentially arranged, and a mounting shell 1021 is fixedly installed on the placement shell 102. The side walls opposite to the four placement shells 102 and the four mounting shells 1021 are respectively provided with a lower rectangular notch 1022 and an upper rectangular notch 1023. The upper side wall of the protective shell 101 is provided with two mutually symmetrical rectangular grooves 104, each rectangular groove 104 is provided with a special-shaped notch 4014 at the bottom, the inner cavity of the protective shell 101 is provided with a placement plate 103, a cover plate 1011 is provided above the protective shell 101, a sliding door 1012 is provided above the cover plate 1011, and a movable plate 202 is provided at the bottom of the inner cavity of the four installation shells 1021, and a placement notch 1031 is provided on the placement plate 103, and a relay is placed in the inner cavity of the placement notch 1031. The limiting unit 200 includes four flipping components and limiting components, and the four flipping components are respectively used to drive the moving plate 202 to move. When the moving plate 202 moves, it is used to drive the limiting component to limit the relay body placed on the placement plate 103; the locking unit 400 includes a clamping component, and the clamping component includes a plurality of plug-in rods 4021, each plug-in rod 4021 is respectively fixedly installed with a fixed block 402 at one end away from the flipping component, and a movable rod 4013 is arranged above each fixed block 402, and a third sliding mechanism is arranged on the opposite side walls of each plug-in rod 4021, and the third sliding mechanism includes a third slide groove 4022, and the third slide grooves 4022 are arranged between the two opposite side walls of the special-shaped notch 1041, and the inner cavity of each third slide groove 4022 is slidably installed with a third slider 4023, and each third slider 4023 is symmetrical with each other, and the third sliding mechanism is used to assist the plug-in rod 4021 to move, and each plug-in rod 4021 is used to position the flipping component. When the flip assembly flips, it can pass through the lower rectangular slot 1022 and the upper rectangular slot 1023 opened on the placement shell 102 and the installation shell 1021, so that the movable plate 202 can be squeezed to move vertically upward with the assistance of the second slide groove 2021 and the second slider 2022. When the movable plate 202 moves vertically upward, it will be able to drive the fixed rod 2023 to move vertically downward, so the fixed rod 2023 can be used to drive the limit assembly to move until one end of the flip assembly is in contact with the protective shell 101. The limit assembly can clamp and limit the relay body around, and at the same time, by covering the cover plate 1011, it drives the locking unit to limit the flip mechanism, thereby ensuring that the relay body will not shake.

[0042] like Figures 1 to 4As shown, in a specific embodiment, two mutually symmetrical first slide grooves 1013 are respectively provided around the inner cavity of the protective shell 101, and a first slider 1014 is slidably installed in the inner cavity of each first slide groove 1013, and the other end of each first slider 1014 is connected to a placement plate 103. In this setting, it is ensured that the placement plate 103 can move vertically upward.

[0043] like Figures 3 to 9 As shown, further, the flip assembly includes four flip plates 201, which are respectively arranged in the inner cavity of the housing 102, and a rotating rod 2011 is fixedly installed in the middle of each flip plate 201. First bearings 2013 are respectively arranged at both ends of each rotating rod 2011, and each first bearing 2013 is respectively installed on the two opposite side walls of the inner cavity of the housing 102, and each rotating rod 2011 is respectively provided with a plug-in slot 2014 at both ends, and each plug-in slot 2014 is respectively matched with a plug-in rod 4021. In this configuration, the specific installation position and components of the flip assembly are determined.

[0044] like Figures 3 to 9 As shown, further, limit blocks 2016 are arranged above the four flip plates 201, and the four limit blocks 2016 are respectively installed on the inner wall of the protective shell 101, and first torsion springs 2012 are respectively arranged at both ends of the four flip plates 201, and each first torsion spring 2012 is respectively arranged on the rotating rod 2011, and the opposite ends of each first torsion spring 2012 are respectively arranged on the first bearing 2013. In this arrangement, it is ensured that the flip plate 201 can be flipped.

[0045] like Figure 5 to Figure 6 As shown, further, the two opposite side walls of each movable plate 202 are respectively provided with a second sliding mechanism, the second sliding mechanism includes a plurality of second slide grooves 2021, each second slide groove 2021 is respectively opened on the two opposite side walls of the inner cavity of the mounting shell 1021, a second slider 2022 is slidably installed in the inner cavity of each second slide groove 2021, the two opposite side walls of each second slider 2022 are connected to the movable plate 202, and a fixing rod 2023 is fixedly installed above each movable plate 202. In this configuration, it is ensured that when the flip plate 201 flips, the movable plate 202 can be pushed to move up and down at the auxiliary value of the second sliding mechanism.

[0046] Embodiment 2:

[0047] The difference between the above embodiment and this embodiment is that: Figure 5 to Figure 6As shown, a relay protection test device, the limit assembly includes four rotating rods 203, both ends of the four rotating rods 203 are provided with second bearings 2033, each second bearing 2033 is installed in pairs on the two opposite side walls of the inner cavity of the mounting housing 1021, a rotating disk 2031 is fixedly installed on the four rotating rods 203, a second torsion spring 2032 is arranged on one side wall of the rotating disk 2031, each second torsion spring 2032 is arranged on the rotating rod 203, and each second torsion spring 2032 is arranged on the second bearing 2033 at one end away from the rotating disk 2031, and a fixing plate 2034 is fixedly installed on one side wall of each rotating disk 2031 away from the second torsion spring 2032, and a fixing rod 2023 is arranged below the fixing plate 2034. In this setting, the installation position and components of the limit assembly are determined.

[0048] like Figures 1 to 8 As shown, in a specific embodiment, guide slots 2035 are provided on the four rotating rods 203, and the four guide slots 2035 are symmetrical with each other. Guide sliders are slidably installed in the inner cavities of the four guide slots 2035, and the other end of the guide slider is fixedly connected to a guide sleeve 2036, each guide sleeve 2036 is respectively sleeved on the rotating rod 203, and one end of each guide sleeve 2036 away from the turntable 2031 is fixedly connected to two mutually symmetrical connecting rods 2037, each connecting rod 2037 is movably passed through the mounting shell 1021 and the side wall of the protective shell 101, and one end of each connecting rod 2037 away from the guide sleeve 2036 is fixedly connected with a positioning plate 2038 between two, and each guide sleeve 2036 is movably passed through two mutually symmetrical guide rods 2039, and both ends of each guide rod 2039 are respectively fixedly connected to the mounting shell 1021. In this configuration, it is ensured that when the movable plate 202 moves vertically upward, it will be able to drive the fixed rod 2023 to move vertically downward, so that the limit assembly can be driven to move by the fixed rod 2023 until one end of the flip assembly is in contact with the protective shell 101, and the limit assembly can clamp and limit the relay body around.

[0049] like Figures 7 to 9 As shown, further, each movable rod 4013 is movably connected to a moving rod 401 at one end away from the fixed block 402, and each moving rod 401 is movably penetrated through the rectangular groove 104, and two mutually symmetrical circular stop plates 1042 are fixedly installed in each rectangular groove 104, and the inner cavity of the circular stop plate 1042 is movably penetrated by the movable rod 4013. In this configuration, it is ensured that the staff can cover the cover plate 1011, so that the cover plate 1011 can squeeze the moving rod 401 to move vertically downward, and when the moving rod 401 moves vertically downward, it can drive the movable rod 4013 to push the fixed block 402 to drive the plug-in rod 4021 to move horizontally with the assistance of the third slide groove 4022 and the third slider 4023.

[0050] like Figures 7 to 9 As shown, further, a mounting plate 4011 is fixedly mounted on each moving rod 401, each mounting plate 4011 is respectively located between two return-shaped limit plates 1042, a return spring 4012 is fixedly connected to the bottom of each mounting plate 4011, each return spring 4012 is respectively sleeved on the moving rod 401, and the other end of each return spring 4012 is respectively fixedly connected to the return-shaped limit plate 1042. In this arrangement, it is ensured that when the cover plate 1011 is opened, the moving rod 401 can be reset with the assistance of the return spring 4012.

[0051] Embodiment 3:

[0052] The present invention also discloses a relay protection testing method, the steps of which are as follows:

[0053] Step 1: First, the staff places the relay body on the placement plate 103 so that the bottom of the relay body can be located in the inner cavity of the placement slot 1031 opened on the placement plate 103. When the placement is completed, the placement plate 103 can move vertically downward under the gravity of the relay body and with the assistance of the first slide groove 1013 and the first slider 1014, thereby squeezing the flip assembly to rotate;

[0054] Step 2: When the flip assembly flips, it can pass through the lower rectangular notch 1022 and the upper rectangular notch 1023 opened on the placement shell 102 and the installation shell 1021, so it can squeeze the movable plate 202 to move vertically upward with the assistance of the second slide groove 2021 and the second slider 2022. When the movable plate 202 moves vertically upward, it can drive the fixed rod 2023 to move vertically downward, so the limit assembly can be driven to move by the fixed rod 2023, until one end of the flip assembly is in contact with the protective shell 101, the limit assembly can clamp and limit the relay body around.

[0055] Step 3: At this time, the staff covers the cover plate 1011, so that the cover plate 1011 can squeeze the moving rod 401 to move vertically downward. When the moving rod 401 moves vertically downward, it can drive the movable rod 4013 to push the fixed block 402 to drive the plug-in rod 4021 to move horizontally with the assistance of the third slide groove 4022 and the third slider 4023. Therefore, the plug-in rod 4021 can be plugged into the inner cavity of the plug-in slot 2014 opened on the side wall of the rotating rod 2011 after rotation, so as to limit the rotating rod 2011. Therefore, to a certain extent, it is avoided that the shaking causes the flip plate 201 to rotate slightly, thereby causing the relay body of the placement plate 103 to collide;

[0056] Step 4: When testing is required, the staff opens the sliding door 1012 provided on the cover plate 1011, so that the upper part of the relay body can be tested through the testing equipment to observe whether it is damaged or not.

[0057] The implementation principle of a relay protection test device and a test method thereof of this embodiment is as follows:

[0058] First, the staff places the relay body on the placement plate 103 so that the bottom of the relay body can be located in the inner cavity of the placement slot 1031 opened on the placement plate 103. When the placement is completed, the placement plate 103 can move vertically downward under the gravity of the relay body and with the assistance of the first slide groove 1013 and the first slider 1014, thereby squeezing the flip plate 201.

[0059] When the placement plate 103 squeezes the flip plate 201, the flip plate 201 will be able to rotate with the assistance of the rotating rod 2011 and the first bearing 2013, so that one end of the placement plate 103 can be tilted, thereby passing through the lower rectangular notch 1022 and the upper rectangular notch 1023 opened at the placement shell 102 and the installation shell 1021, so that the movable plate 202 can be squeezed to move vertically upward with the assistance of the second sliding groove 2021 and the second sliding block 2022. When the movable plate 202 moves vertically upward, it can drive the fixed rod 2023 to move vertically downward, so that it can pass through the fixed rod 2023 pushes the fixed plate 2034 to drive the rotating disk 2031 to rotate with the assistance of the rotating rod 203. When the rotating rod 203 rotates, it can drive the guide sleeve 2036 to move horizontally with the assistance of the guide slot 2035, the guide slider and the guide rod 2039. When the guide sleeve 2036 moves horizontally, it can drive the connecting rod 2037 to move horizontally, thereby pushing the positioning plate 2038 to move through the connecting rod 2037 until the flip plate 201 and the protective shell 101 are attached. At this time, the positioning plate 2038 can clamp and limit the relay body around.

[0060] At this time, the staff covers the cover plate 1011, so that the cover plate 1011 can squeeze the moving rod 401 to move vertically downward. When the moving rod 401 moves vertically downward, it can drive the movable rod 4013 to push the fixed block 402 to drive the plug-in rod 4021 to move horizontally with the assistance of the third slide groove 4022 and the third slider 4023. Therefore, the plug-in rod 4021 can be plugged into the inner cavity of the plug-in slot 2014 opened on the side wall of the rotating rod 2011 after rotation, so as to limit the rotating rod 2011. Therefore, to a certain extent, it is avoided that the shaking causes the flip plate 201 to rotate slightly, thereby causing the relay body of the placement plate 103 to collide;

[0061] When testing is required, the staff opens the sliding door 1012 provided on the cover 1011, and can thus test the top of the relay body through the testing equipment to see if it is damaged or not (the specific test is based on the prior art).

Claims

1. A relay protection test device and a test method thereof, comprising an installation unit (100), a limit unit (200) and a locking unit (400), characterized in that: The installation unit (100) comprises a protective shell (101), and a placement shell (102) is fixedly installed around the protective shell (101), and the four placement shells (102) are arranged in a circle, and a mounting shell (1021) is fixedly installed on the placement shell (102), and the side walls opposite to each other of the four placement shells (102) and the four mounting shells (1021) are respectively provided with a lower rectangular notch (1022) and an upper rectangular notch (1023), and the upper side wall of the protective shell (101) is respectively provided with two mutually symmetrical rectangular notches (1022, 1023, ... Grooves (104), each of the rectangular grooves (104) is provided with a special-shaped notch (4014) at the bottom, the inner cavity of the protective shell (101) is provided with a placement plate (103), a cover plate (1011) is provided above the protective shell (101), a sliding door (1012) is provided above the cover plate (1011), and a movable plate (202) is provided at the bottom of the inner cavity of the four installation shells (1021), a placement notch (1031) is provided on the placement plate (103), and a relay body is placed in the inner cavity of the placement notch (1031); The limiting unit (200) comprises four flipping assemblies and a limiting assembly, wherein the four flipping assemblies are respectively used to drive the moving plate (202) to move, and when the moving plate (202) moves, it is used to drive the limiting assembly to limit the relay body placed above the placement plate (103); The locking unit (400) includes a snap-on assembly, which includes a plurality of plug-in rods (4021), each of which is fixedly mounted with a fixed block (402) at one end away from the flip assembly, and a movable rod (4013) is arranged above each of the fixed blocks (402). The opposite side walls of each of the plug-in rods (4021) are provided with a third sliding mechanism, and the third sliding mechanism includes a third sliding groove (4022), and the third sliding grooves (4022) are arranged between two opposite side walls of the special-shaped notch (1041). A third sliding block (4023) is slidably mounted in the inner cavity of each of the third sliding grooves (4022), and each of the third sliding blocks (4023) is symmetrical with each other. The third sliding mechanism is used to assist the plug-in rod (4021) in moving, and each of the plug-in rods (4021) is used to position the flip assembly.

2. A relay protection test device and test method thereof according to claim 1, characterized in that: Two mutually symmetrical first slide grooves (1013) are respectively provided around the inner cavity of the protective shell (101), and a first sliding block (1014) is slidably installed in the inner cavity of each of the first slide grooves (1013), and the other end of each of the first sliding blocks (1014) is connected to a placement plate (103).

3. A relay protection test device and test method thereof according to claim 1, characterized in that: The flip assembly comprises four flip plates (201), the four flip plates (201) are respectively arranged in the inner cavity of the placement shell (102), a rotating rod (2011) is fixedly installed in the middle of each flip plate (201), first bearings (2013) are respectively arranged at both ends of each rotating rod (2011), and each of the first bearings (2013) is respectively installed on two opposite side walls of the inner cavity of the placement shell (102), and each of the rotating rods (2011) is respectively provided with a plug-in slot (2014) at both ends, and each of the plug-in slots (2014) is respectively matched with the plug-in rod (4021).

4. A relay protection test device and test method thereof according to claim 3, characterized in that: Limit blocks (2016) are arranged above the four flip plates (201), and the four limit blocks (2016) are respectively installed on the inner wall of the protective shell (101). First torsion springs (2012) are respectively arranged at both ends of the four flip plates (201), and each of the first torsion springs (2012) is respectively arranged on the rotating rod (2011), and opposite ends of each of the first torsion springs (2012) are respectively arranged on the first bearing (2013).

5. A relay protection test device and test method thereof according to claim 1, characterized in that: The opposite side walls of each movable plate (202) are respectively provided with a second sliding mechanism, the second sliding mechanism includes a plurality of second sliding grooves (2021), each of the second sliding grooves (2021) is respectively opened on the opposite side walls of the inner cavity of the mounting shell (1021), a second sliding block (2022) is slidably installed in the inner cavity of each second sliding groove (2021), the opposite side walls of each second sliding block (2022) are connected to the movable plate (202), and a fixing rod (2023) is fixedly installed above each movable plate (202).

6. A relay protection test device and test method thereof according to claim 1, characterized in that: The limit assembly comprises four rotating rods (203), both ends of the four rotating rods (203) are provided with second bearings (2033), each of the second bearings (2033) is installed in pairs on two opposite side walls of the inner cavity of the installation shell (1021), a rotating disk (2031) is fixedly installed on the four rotating rods (203), a second torsion spring (2032) is arranged on one side wall of the rotating disk (2031), each of the second torsion springs (2032) is arranged on the rotating rod (203), and each of the second torsion springs (2032) is arranged on the second bearing (2033) at one end away from the rotating disk (2031), and a fixing plate (2034) is fixedly installed on one side wall of each rotating disk (2031) away from the second torsion spring (2032), and a fixing rod (2023) is arranged in close contact with the lower side of the fixing plate (2034).

7. A relay protection test device and test method thereof according to claim 6, characterized in that: The four rotating rods (203) are each provided with a guide slot (2035), and the four guide slots (2035) are symmetrical with each other. The inner cavities of the four guiding slots (2035) are each slidably mounted with a guide slider, and the other end of the guide slider is fixedly connected with a guide sleeve (2036), each of the guide sleeves (2036) is respectively sleeved on the rotating rod (203), and one end of each guide sleeve (2036) away from the rotating disk (2031) is fixedly connected with two symmetrical connecting sleeves. A connecting rod (2037), each of the connecting rods (2037) is movably passed through the side wall of the installation shell (1021) and the protective shell (101), and each of the connecting rods (2037) is respectively connected to a positioning plate (2038) at one end away from the guide sleeve (2036), and each of the guide sleeves (2036) is movably passed through two mutually symmetrical guide rods (2039), and each of the two ends of each guide rod (2039) is respectively fixedly connected to the installation shell (1021).

8. A relay protection test device and test method thereof according to claim 1, characterized in that: Each movable rod (4013) is movably connected to a movable rod (401) at one end away from the fixed block (402), and each movable rod (401) is movably passed through the rectangular groove (104). Two mutually symmetrical circular limit plates (1042) are fixedly installed in each rectangular groove (104), and the movable rod (4013) is movably passed through the inner cavity of the circular limit plate (1042).

9. A relay protection test device and a test method thereof according to claim 8, characterized in that: A mounting plate (4011) is fixedly mounted on each of the moving rods (401), each of the mounting plates (4011) is respectively located between two return-shaped limit plates (1042), a return spring (4012) is fixedly connected to the bottom of each of the mounting plates (4011), each of the return springs (4012) is respectively sleeved on the moving rod (401), and the other end of each of the return springs (4012) is respectively fixedly connected to the return-shaped limit plate (1042).

10. A relay protection testing method, characterized in that: A relay protection test device and a relay protection test method applied to any one of claims 1 to 9, comprising the following steps: Step 1: First, the staff places the relay body on the placement plate (103) so that the bottom of the relay body can be located in the inner cavity of the placement slot (1031) opened on the placement plate (103). When the placement is completed, the placement plate (103) can move vertically downward under the gravity of the relay body and with the assistance of the first slide groove (1013) and the first slider (1014), thereby squeezing the flip assembly to rotate; Step 2: When the flip assembly flips, it can pass through the lower rectangular notch (1022) and the upper rectangular notch (1023) opened on the placement shell (102) and the installation shell (1021), so that the movable plate (202) can be squeezed to move vertically upward with the assistance of the second slide groove (2021) and the second slider (2022). When the movable plate (202) moves vertically upward, it can drive the fixed rod (2023) to move vertically downward, so that the limit assembly can be driven to move by the fixed rod (2023), until one end of the flip assembly is in contact with the protective shell (101), and the limit assembly can clamp and limit the relay body on all sides; Step 3: At this time, the staff covers the cover plate (1011), so that the cover plate (1011) can squeeze the movable rod (401) to move vertically downward. When the movable rod (401) moves vertically downward, it can drive the movable rod (4013) to push the fixed block (402) to drive the plug-in rod (4021) to move horizontally with the assistance of the third slide groove (4022) and the third slider (4023). Therefore, the plug-in rod (4021) can be plugged into the inner cavity of the plug-in slot (2014) opened on the side wall of the rotating rod (2011) after rotation, thereby limiting the rotating rod (2011). Therefore, to a certain extent, it is avoided that the shaking causes the flip plate (201) to rotate slightly, thereby causing the relay body of the placement plate (103) to collide; Step 4: When testing is required, the staff opens the sliding door (1012) provided on the cover plate (1011), so that the upper part of the relay body can be tested through the testing equipment to observe whether it is damaged or not.

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