Mounting mechanism and insulation resistance tester

Abstract

The utility model discloses a mounting mechanism and an insulation resistance tester, and relates to the technical field of resistance testing, and the mounting mechanism comprises a limiting unit which comprises a placing block, a protruding block arranged at the end part of the placing block, a pressing rod arranged at the inner side of the protruding block, a rotating sleeve arranged at the end part of the pressing rod, and an unlocking piece arranged at one side of the pressing rod, the jacking piece is arranged on the inner side of the placing block; and an instrument housing. The beneficial effects of the utility model are that the rotating sleeve can be driven to rotate through the arranged push pressing rod, so that the rotating sleeve can rotate to the interior of the protruding block to contact with the limit of the instrument shell; and meanwhile, a jacking piece can be driven to rotate while a pressing rod moves, the jacking piece rotates, so that a cam can eject the instrument shell out of the interior of a placement block, and therefore a worker can take the instrument shell better and conveniently, and operation of the worker is better facilitated to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of resistance testing, in particular to a mounting mechanism and an insulation resistance tester. Background Art

[0002] The correct voltage range selection of the insulation resistance tester is the key to ensure accurate measurement of insulation values. When measuring insulation resistance, choosing the right voltage range is not only related to the accuracy of the measurement, but also directly related to the safe use of the equipment. Wrong range selection may lead to distortion of the measurement results and even damage the insulation level of the winding, thus threatening the safe operation of the entire equipment. The correct voltage range selection of the insulation resistance tester is of great significance for accurately measuring insulation values. In actual operation, the rated voltage, insulation level, test environment and other factors of the equipment should be fully considered, the voltage range should be reasonably selected, and the test should be carried out in strict accordance with the operating procedures to ensure the accuracy of the measurement results and the safe use of the equipment.

[0003] When conducting resistance tests between hydropower station units, due to the wide variety of hydropower station units and auxiliary equipment, different parameters, and different rated voltage levels of motors and transformers, in daily inspection and maintenance, if the staff confuses the equipment parameters due to negligence, it will cause safety hazards. In addition, the existing insulation resistance testers are mostly placed inside the box, which can protect the insulation resistance tester. Due to the sinking of the box, it is inconvenient for the staff to take the insulation resistance tester, which affects the staff's operation to a certain extent. Utility Model Content

[0004] In view of the above-mentioned prior art problems, the present utility model is proposed.

[0005] The utility model aims to provide a mounting mechanism, which aims to solve the problem that the existing insulation resistance tester is placed inside a box and is inconvenient to take out.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: an installation mechanism, comprising: a limiting unit, comprising a placement block, a protruding block arranged at the end of the placement block, a pressing rod arranged inside the protruding block, a rotating sleeve arranged at the end of the pressing rod, an unlocking member arranged on one side of the pressing rod, and a lifting member arranged inside the placement block; an instrument housing;

[0007] The placement block is matched with the instrument housing, and the instrument housing is arranged inside the placement block.

[0008] As a preferred solution of the installation mechanism of the utility model, wherein: the placement block is connected to the protruding block, and the placement block is communicated with the inside of the protruding block;

[0009] The protruding block includes a partition plate arranged inside the protruding block, a limiting plate arranged on the top of the partition plate, a sleeve arranged on one side of the partition plate, a circular hole arranged at the end of the protruding block, and a through groove penetrating the side wall of the placing block;

[0010] The rotating sleeve passes through the circular hole and extends to the inner side of the protruding block.

[0011] As a preferred solution of the installation mechanism of the utility model, wherein: the pressing rod includes a guide rod arranged on its side wall, a rack arranged on one end of the pressing rod, and a guide sleeve arranged on the side wall of the other end of the pressing rod;

[0012] The rotating sleeve includes an arc groove opened on its side wall, and a limit block arranged at the end of the rotating sleeve;

[0013] The pressing rod is matched with the rotating sleeve; the end of the pressing rod passes through the protruding block and extends into the inside thereof.

[0014] As a preferred solution of the installation mechanism of the utility model, wherein: the guide rod is adapted to the arc groove; the end of the limit block is in contact with the partition; the limit block passes through the through groove and extends to the inner side of the placement block;

[0015] The limiting block includes a compression groove arranged on the inner side thereof; the limiting plate can limit the limiting block.

[0016] As a preferred solution of the installation mechanism of the utility model, wherein: the lifting member includes a rotating shaft, a gear arranged outside the rotating shaft, and a cam arranged on one side of the gear;

[0017] The rotating shaft is matched with the shaft sleeve; the rotating shaft is meshed with the rack.

[0018] As a preferred solution of the installation mechanism of the utility model, wherein: the placement block includes a second through groove opened on its inner wall; the second through groove corresponds to the position of the cam; the end of the cam contacts the bottom of the instrument housing;

[0019] The unlocking member includes a connecting rod arranged at an end thereof, and a return spring arranged outside the connecting rod;

[0020] One end of the return spring contacts the unlocking member; the other end of the return spring contacts the end of the pressing rod.

[0021] As a preferred solution of the installation mechanism of the utility model, wherein: the connecting rod is adapted to the guide sleeve; the connecting rod passes through the guide sleeve and extends to the inside of the protruding block;

[0022] The end of the connecting rod contacts the end surface of the limiting block.

[0023] As a preferred solution of the installation mechanism of the utility model, the protection unit includes a box body and a box cover arranged at the end of the box body; the placement block is arranged on the inner side of the box body;

[0024] The instrument housing comprises a limiting groove opened on its side wall; the limiting block is matched with the limiting groove; the end of the limiting block passes through the through groove and extends to the inner side of the limiting groove.

[0025] The beneficial effects of the installation mechanism of the utility model are as follows: the pushing and pressing rod is provided to drive the rotating sleeve to rotate, so that the rotating sleeve can be rotated to the inside of the protruding block, thereby contacting the limit of the instrument shell; at the same time, the movement of the pressing rod can drive the lifting part to rotate, and the rotation of the lifting part allows the cam to push the instrument shell out from the inside of the placement block, thereby making it easier for the staff to take the instrument shell and facilitating the staff's operation to a certain extent.

[0026] Another object of the utility model is to provide an insulation resistance tester, which aims to solve the problem that there are grade differences in the rated voltages of motors and transformer equipment inside a hydropower station, and insulation measurements need to be performed during inspection and maintenance; if the staff accidentally confuses the equipment parameters, it will cause safety hazards.

[0027] In order to solve the above technical problems, the utility model also provides the following technical solutions: an insulation resistance tester, which includes a mounting mechanism; and an insulation resistance tester, including an NFC communication module, a voice broadcast module and a tester PLC module.

[0028] As a preferred solution of the insulation resistance tester of the utility model, it also includes an NFC chip; the NFC chip is pasted near the corresponding device; the NFC chip interacts with the NFC communication module and transmits the content of the NFC chip to the tester PLC module.

[0029] The insulation resistance tester of the utility model has the following beneficial effects: the effective communication distance of NFC is 10 to 20 cm, and interaction is performed within a local range without signal interference, which is more suitable for hydropower station plants with concentrated equipment and complex models; staff can be warned through language broadcasts; and risks can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a structural schematic diagram of the utility model.

[0032] Figure 2 It is a schematic diagram of the explosion structure in the utility model.

[0033] Figure 3 It is a partial cross-sectional view of the placement block in the utility model.

[0034] Figure 4 For the utility model Figure 3 A is a partial enlarged view of the

[0035] Figure 5 It is a schematic diagram of the connection structure between the pressing rod and the lifting member in the utility model.

[0036] Figure 6 It is a schematic diagram of the connection structure between the pressing rod and the placement block in the utility model.

[0037] Figure 7 The utility model is a flowchart of the insulation resistance tester. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0041] Example 1

[0042] Reference Figure 1 to Figure 4, is the first embodiment of the utility model, which provides a mounting mechanism, including, a limiting unit 100, including a placement block 101, a protruding block 102 arranged at the end of the placement block 101, a pressing rod 103 arranged on the inner side of the protruding block 102, a rotating sleeve 104 arranged at the end of the pressing rod 103, an unlocking member 105 arranged on one side of the pressing rod 103, and a lifting member 106 arranged on the inner side of the placement block 101; an instrument housing 200; the placement block 101 is adapted to the instrument housing 200, and the instrument housing 200 is arranged on the inner side of the placement block 101.

[0043] Furthermore, the placement block 101 and the protruding block 102 are integrally formed, and the placement block 101 and the protruding block 102 are connected; and the pressing rod 103 and the rotating sleeve 104 cooperate with each other; the pressing rod 103 moves downward to drive the rotating sleeve 104 to rotate; as the rotating sleeve 104 rotates, the position of the instrument housing 200 can be limited; and the movement of the pressing rod 103 can drive the lifting piece 106 to rotate, and as the lifting piece 106 rotates, the instrument housing 200 can be ejected from the inside of the placement block 101; and the lifting piece 106 moves in the vertical direction and can contact the rotating sleeve 104, thereby limiting the position of the rotating sleeve 104.

[0044] During use, when the staff needs to limit the position of the instrument housing 200, the staff places the instrument housing 200 inside the placement block 101; then the end of the instrument housing 200 is brought into contact with the top of the cam 106c, and as the instrument housing 200 is squeezed, the cam 106c can be turned over, so that the cam 106c rotates along the axial direction of the rotating shaft 106a; as the lifting member 106 rotates, the pressing rod 103 is driven to move, and the pressing rod 103 drives the rotating sleeve 104 to rotate during the movement, and the rotating sleeve 104 is turned to the inside of the placement block 101, and then the rotating sleeve 104 and the instrument housing 200 cooperate with each other to limit the position of the instrument housing 200 through the rotating sleeve 104.

[0045] In summary, the position of the instrument housing 200 can be limited by the rotating sleeve 104; at the same time, the instrument housing 200 located inside the placement block 101 can be pushed out by flipping the lifting piece 106, which can better facilitate the operation of the staff; making it easier and more convenient for the staff to use it.

[0046] Example 2

[0047] Reference Figures 1 to 6, which is the second embodiment of the utility model, includes a placing block 101 connected to a protruding block 102, and the interiors of the placing block 101 and the protruding block 102 are communicated with each other; the protruding block 102 includes a partition 102a arranged inside it, a limiting plate 102b arranged on the top of the partition 102a, a shaft sleeve 102c arranged on one side of the partition 102a, a circular hole 102d arranged at the end of the protruding block 102, and a through groove 102e penetrating the side wall of the placing block 101; the rotating sleeve 104 penetrates the circular hole 102d and extends to the inner side of the protruding block 102.

[0048] Preferably, the interior of the raised block 102 is connected to the placement block 101; and the partition 102a can divide the interior of the raised block 102 into two spaces; and the rotating sleeve 104 is arranged inside the space above the interior of the raised block 102; and the circular hole 102d is opened at the top of the raised block 102; and the rotating sleeve 104 passes through the circular hole 102d and extends to the interior of the raised block 102.

[0049] Furthermore, the pressing rod 103 includes a guide rod 103a arranged on its side wall, a rack 103b arranged on one end of the pressing rod 103, and a guide sleeve 103c arranged on the side wall of the other end of the pressing rod 103; the rotating sleeve 104 includes an arc groove 104a opened on its side wall, and a limit block 104b arranged at the end of the rotating sleeve 104; the pressing rod 103 is adapted to the rotating sleeve 104; the end of the pressing rod 103 passes through the protruding block 102 and extends into the interior thereof.

[0050] Preferably, the pressing rod 103 is located at the upper part of the partition 102a, and the rack 103b is located at the lower part of the partition 102a; the rack 103b and the pressing rod 103 are welded and fixed; and the guide sleeve 103c is located at the outer side of the end of the pressing rod 103, and the rotating sleeve 104 is located on the inner side of the pressing rod 103, and the rotating sleeve 104 passes through the pressing rod 103 and extends into the interior thereof.

[0051] Furthermore, the guide rod 103a is adapted to the arc groove 104a; the end of the limit block 104b is in contact with the partition 102a; the limit block 104b passes through the through groove 102e and extends to the inner side of the placement block 101; the limit block 104b includes a compression groove 104b-1 arranged on the inner side thereof; the limit plate 102b can limit the limit block 104b.

[0052] Preferably, the guide rod 103a is matched with the arc groove 104a, and the end of the guide rod 103a passes through the arc groove 104a and extends into the interior thereof; and the end of the limit block 104b is in contact with the upper surface of the partition 102a; the compression groove 104b-1 is opened so that it is convenient for the staff to press the limit block 104b, so that the opening angle of the limit block 104b is reduced; thereby, the limit on the limit block 104b can be released.

[0053] Furthermore, the lifting member 106 includes a rotating shaft 106a, a gear 106b disposed outside the rotating shaft 106a, and a cam 106c disposed on one side of the gear 106b; the rotating shaft 106a is adapted to the shaft sleeve 102c; and the rotating shaft 106a is meshed with the rack 103b.

[0054] Preferably, the rotating shaft 106a and the sleeve 102c are matched with each other; and the rotating shaft 106a rotates along the axial direction of the sleeve 102c; the set gear 106b is fixedly connected to the rotating shaft 106a, and the rotating shaft 106a and the cam 106c are fixedly connected; the position of the set rack 103b corresponds to the position of the gear 106b; and the movement of the rack 103b can drive the gear 106b to flip; the rotation of the lifting member 106 can drive the cam 106c to rotate, so that its end can contact the instrument housing 200; thereby, the instrument housing 200 can be ejected from the inside of the placement block 101.

[0055] Furthermore, the placement block 101 includes a second through groove 101a opened on its inner wall; the second through groove 101a corresponds to the position of the cam 106c; the end of the cam 106c contacts the bottom of the instrument housing 200; the unlocking member 105 includes a connecting rod 105a arranged at its end, and a return spring 105b arranged on the outside of the connecting rod 105a; one end of the return spring 105b contacts the unlocking member 105; the other end of the return spring 105b contacts the end of the pressing rod 103.

[0056] Preferably, the connecting rod 105a is adapted to the guide sleeve 103c, and the connecting rod 105a moves along the vertical direction of the guide sleeve 103c; and the reset spring 105b provided can drive the unlocking member 105 to reset, thereby ensuring the next operation of the unlocking member 105; by pressing the unlocking member 105, the end of the unlocking member 105 can be brought into contact with the limit block 104b, so that the opening angle of the limit block 104b can be reduced.

[0057] Furthermore, the connecting rod 105a is adapted to the guide sleeve 103c; the connecting rod 105a penetrates the guide sleeve 103c and extends to the inside of the protruding block 102; and the end of the connecting rod 105a contacts the end surface of the limiting block 104b.

[0058] Preferably, the end of the connecting rod 105a can contact the end of the limit block 104b, and by pressing the connecting rod 105a downward, the upper direction of the limit block 104b can be driven to approach the lower direction of the limit block 104b, so that the opening angle of the compression groove 104b-1 is reduced, so that the limit block 104b can leave from one side of the limit plate 102b.

[0059] Furthermore, the instrument housing 200 includes a limiting groove 200a opened on its side wall; the limiting block 104b is adapted to the limiting groove 200a; and the end of the limiting block 104b passes through the through groove 102e and extends to the inner side of the limiting groove 200a.

[0060] Preferably, the instrument housing 200 is opened on one side thereof, and the limit groove 200a is adapted to the limit block 104b; the rotation of the pressing rod 103 can drive the rotating sleeve 104 to rotate, so that the limit block 104b rotates to the inner side of the limit groove 200a; thus, the instrument housing 200 can be limited by the rotating sleeve 104.

[0061] When in use, the staff needs to take out the instrument housing 200 set inside the placement block 101, and presses the pressing rod 103 by hand; the pressing rod 103 moves downward to drive the guide rod 103a to move, and as the guide rod 103a moves downward, the rotating sleeve 104 located on the inner side of the limiting plate 102d can be driven to rotate; as the rotating sleeve 104 rotates, the limiting block 104b is driven to rotate, so that the limiting block 104b can leave the inner side of the limiting groove 200a; as the guide rod 103a continues to move downward, the limiting block 104b is turned over to the inner side of the protruding block 102; the limiting block 104b turns over, so that the limiting block 104b is compressed by the end of the limiting plate 102b, so that the limiting block 104b is in a compressed state; as the limiting block 104b continues to rotate; the limiting block 104b rotates to one side of the limiting plate 102b; at this time, the limiting block 104b is no longer limited The plate 102b is squeezed, and then the limit block 104b returns to its original state under the action of the rebound force; after the limit block 104b is restored, the position of the limit block 104b can be limited to one side of the limit plate 102b; thereby, the limit block 104b cannot rotate; the limit block 104b is fixed inside the protruding block 102; the pressing rod 103 moves downward while driving the rack 103b to move; as the rack 103b moves, the gear 106b meshing with it can be driven to rotate; the gear 106b rotates along the axial direction of the rotating shaft 106a; as the gear 106b rotates, the cam 106c is driven to rotate; as the cam 106c continuously turns over, its end continuously contacts the bottom of the instrument housing 200, and as the cam 106c turns over, the instrument housing 200 can be ejected from the inside of the placement block 101, which can better facilitate the staff to take the equipment from the inside of the placement block 101 for operation;

[0062] When the staff needs to install the instrument housing 200 inside the placement block 101, the staff first places the instrument housing 200 inside the placement block 101. At this time, since the position of the rotating sleeve 104 is limited, the end of the cam 106c is lifted up; then the connecting rod 105a is pressed, so that the connecting rod 105a drives the guide sleeve 103c to move; the connecting rod 105a moves downward and its end can compress the limit block 104b; then the instrument housing 200 is pressed; so that the instrument housing 200 can drive the cam 106c to flip, and the flipping of the cam 106c drives the gear 106b to flip; the flipping of the gear 106b drives the rack 103b moves, and as the rack 103b moves, the guide rod 103a moves upward, so that the guide rod 103a can drive the rotating sleeve 104 to flip, so that the distance of the limit block 104b can be compressed, so that the limit block 104b can be moved to one side of the limit plate 102b; as the limit block 104b flips, the limit block 104b flips to the side of the through groove 102e, and then the limit block 104b flips to the inside of the limit groove 200a, the instrument housing 200 can be pressed against the inside of the placement block 101; thereby, the instrument housing 200 can be installed on the inside of the placement block 101.

[0063] In summary, the pressing rod can be used to drive the rotating sleeve to rotate, so that the rotating sleeve can be rotated to the inside of the protruding block, thereby contacting the limit of the instrument housing; at the same time, the movement of the pressing rod can drive the lifting part to rotate, and the rotation of the lifting part allows the cam to push the instrument housing out of the placement block, thereby making it easier for the staff to take the instrument housing and facilitating the operation of the staff to a certain extent.

[0064] Example 3

[0065] Reference Figure 1 and Figure 7 , which is the third embodiment of the utility model, and this embodiment further provides an insulation resistance tester, including, an insulation resistance tester, including an NFC communication module, a voice broadcast module and a tester PLC module; also including, an NFC chip; the NFC chip is pasted near the corresponding device; the NFC chip interacts with the NFC communication module and transmits the content of the NFC chip to the tester PLC module.

[0066] Furthermore, we first sort out the motors and transformer equipment in the hydropower station, make NFC chips, and enter the name and model of the equipment, as well as the range gear to be selected when measuring insulation, measurement time, qualified standards and other precautions into the NFC chip; and stick the NFC chip near the corresponding equipment, taking into account the eye-catching when measuring insulation and the convenience for people to interact with it.

[0067] Then, two expansion modules are developed on the insulation resistance tester, namely the NFC communication module and the voice broadcast module. The NFC communication module interacts with the NFC chip of the device under test, reads the information in the chip, and returns it to the tester PLC module.

[0068] Finally, the tester PLC module forwards the information to the voice broadcast module for voice broadcast, reminding the staff to perform insulation work in accordance with regulations; at the same time, the tester PLC module checks whether the range selected by the insulation resistance tester is consistent with the information read by NFC. If there is any inconsistency, the alarm information is output to the voice broadcast module to remind the staff to correctly select the test range.

[0069] When in use, a person enters the stator insulation measurement area, near the neutral point grounding transformer, and brings the insulation resistance tester close to the NFC module of the device. At this time, the insulation resistance tester recognizes the chip information and broadcasts the following information through the speaker:

[0070] "Hello, you are now at the neutral point grounding transformer of unit 1. The insulation device to be measured is the stator of unit 1. Before measuring the device, please confirm that the device has been powered off, check that there is no pressure, and that no one is working on the device under test. Confirm that the ground wire and probe wire are connected. Please select the 2500V gear for the measurement position. The measurement time is 1 minute. Record the insulation resistance values ​​of 15 seconds and 60 seconds respectively, and calculate the absorption ratio. The insulation resistance value must be greater than or equal to 400MΩ, and the absorption ratio should not be less than 1.6 to pass. After the measurement, please wait for the discharge to end, turn off the power of the insulation resistance tester, remove the ground wire and probe wire, and put them in the storage box."

[0071] When the staff selected the wrong measurement gear, the insulation resistance tester recognized that the gear was inconsistent with the NFC reading information, and output an alarm message through the voice broadcast module: "You are currently selecting the XX gear, please select the correct gear."

[0072] When a person enters the vicinity of the excitation transformer, two NFC chips need to be installed at different locations due to the different voltage levels on the high and low voltage sides. The insulation resistance tester is placed close to the NFC module of the device. At this time, the insulation resistance tester recognizes the chip information and broadcasts the following information through the speaker:

[0073] "Hello, you are now on the low-voltage side of the excitation transformer of unit 1. The insulation equipment to be measured is the low-voltage winding of the excitation transformer of unit 1. Before measuring the equipment, please confirm that the equipment has been powered off, check that there is no pressure, and that no one is working on the tested equipment. Confirm that the ground wire and probe wire are connected. Please select the 500V gear for the measurement position. The measurement time is 1 minute. Record the stable value of the insulation resistance. The insulation resistance value must be greater than or equal to 100MΩ to pass. After the measurement, please wait for the discharge to end, turn off the power of the insulation resistance tester, remove the ground wire and probe wire, and put them in the storage box."

[0074] When the staff selected the wrong measurement gear, the insulation resistance tester recognized that the gear was inconsistent with the NFC reading information, and output an alarm message through the voice broadcast module: "You are currently selecting the XX gear, please select the correct gear."

[0075] It is important to note that the above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A mounting mechanism, characterized in that: include, A limiting unit (100), comprising a placement block (101), a protruding block (102) arranged at the end of the placement block (101), a pressing rod (103) arranged inside the protruding block (102), a rotating sleeve (104) arranged at the end of the pressing rod (103), an unlocking member (105) arranged on one side of the pressing rod (103), and a lifting member (106) arranged inside the placement block (101); an instrument housing (200); The placement block (101) is matched with the instrument housing (200), and the instrument housing (200) is arranged inside the placement block (101).

2. The mounting mechanism according to claim 1, characterized in that: The placement block (101) is connected to the protruding block (102), and the interiors of the placement block (101) and the protruding block (102) are communicated with each other; The protruding block (102) comprises a partition (102a) arranged inside the protruding block, a limiting plate (102b) arranged on the top of the partition (102a), a shaft sleeve (102c) arranged on one side of the partition (102a), a circular hole (102d) arranged at the end of the protruding block (102), and a through groove (102e) penetrating the side wall of the placement block (101); The rotating sleeve (104) passes through the circular hole (102d) and extends to the inner side of the protruding block (102).

3. The mounting mechanism according to claim 2, characterized in that: The pressing rod (103) comprises a guide rod (103a) arranged on a side wall thereof, a rack (103b) arranged on one end of the pressing rod (103), and a guide sleeve (103c) arranged on a side wall of the other end of the pressing rod (103); The rotating sleeve (104) comprises an arc-shaped groove (104a) opened on its side wall, and a limit block (104b) arranged at the end of the rotating sleeve (104); The pressing rod (103) is matched with the rotating sleeve (104); the end of the pressing rod (103) passes through the protruding block (102) and extends into the interior thereof.

4. The mounting mechanism according to claim 3, characterized in that: The guide rod (103a) is adapted to the arc-shaped groove (104a); the end of the limit block (104b) is in contact with the partition (102a); the limit block (104b) penetrates the through groove (102e) and extends to the inner side of the placement block (101); The limiting block (104b) comprises a compression groove (104b-1) arranged on the inner side thereof; the limiting plate (102b) can limit the limiting block (104b).

5. The mounting mechanism according to claim 4, characterized in that: The lifting member (106) comprises a rotating shaft (106a), a gear (106b) arranged outside the rotating shaft (106a), and a cam (106c) arranged on one side of the gear (106b); The rotating shaft (106a) is matched with the shaft sleeve (102c); the rotating shaft (106a) is meshed with the rack (103b).

6. The mounting mechanism according to claim 5, characterized in that: The placement block (101) comprises a second through groove (101a) formed on an inner wall thereof; the second through groove (101a) corresponds to the position of the cam (106c); the end of the cam (106c) contacts the bottom of the instrument housing (200); The unlocking member (105) comprises a connecting rod (105a) arranged at an end thereof, and a return spring (105b) arranged outside the connecting rod (105a); One end of the return spring (105b) contacts the unlocking member (105); the other end of the return spring (105b) contacts the end of the pressing rod (103).

7. The mounting mechanism according to claim 6, characterized in that: The connecting rod (105a) is adapted to the guide sleeve (103c); the connecting rod (105a) passes through the guide sleeve (103c) and extends to the inside of the protruding block (102); The end of the connecting rod (105a) contacts the end surface of the limiting block (104b).

8. The mounting mechanism according to claim 7, characterized in that: Also includes, The protection unit (300) comprises a box body (301) and a box cover (302) arranged at the end of the box body (301); the placement block (101) is located on the inner side of the box body (301); The instrument housing (200) comprises a limiting groove (200a) opened on a side wall thereof; the limiting block (104b) is adapted to the limiting groove (200a); and an end of the limiting block (104b) passes through the through groove (102e) and extends to the inner side of the limiting groove (200a).

9. An insulation resistance tester, characterized in that: comprising the mounting mechanism according to any one of claims 1 to 8; and An insulation resistance tester comprises an NFC communication module, a voice broadcast module and a tester PLC module.

10. The insulation resistance tester according to claim 9, characterized in that: Also includes, NFC chip; the NFC chip is pasted near the corresponding device; the NFC chip interacts with the NFC communication module and transmits the content of the NFC chip to the tester PLC module.

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