CN112485591B

CN112485591B - Distribution transformer earth connection live detection device

Info

Publication number: CN112485591B
Application number: CN202011310779.9A
Authority: CN
Inventors: 魏乾
Original assignee: Guizhou Power Grid Co Ltd
Current assignee: Guizhou Power Grid Co Ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2022-06-14
Anticipated expiration: 2040-11-20
Also published as: CN112485591A

Abstract

The invention discloses a distribution transformer grounding wire live detection device, which comprises a shell; the detection assembly is positioned in the shell, and the acquisition end of the detection assembly is positioned outside the shell; the locking piece is hinged outside the shell, an accommodating space is formed between the locking piece and the shell, and the acquisition end is positioned in the accommodating space; and the shell is also provided with a driving component for driving the locking piece to rotate. The invention can be directly arranged on the grounding wire, can measure the voltage data of the grounding wire in time and feed back the voltage data to the surrounding environment in time, thereby avoiding the occurrence of safety accidents and simultaneously reducing more work for the workers who carry out partial live-line work on the periphery.

Description

Distribution transformer earth connection live detection device

Technical Field

The invention relates to the technical field of electric power tools, in particular to a distribution transformer grounding wire live detection device.

Background

Along with the long erection time of rural power grid transformers and the increase of rural power grid transformation in recent years, more and more transformers are provided. Many old transformers have long erection time, serious corrosion of grounding grid and long-term load unbalance to cause neutral point displacement to cause grounding wire electrification, and with the increase of transformed transformers in recent years, the load divided by the rural power grid has most of the load unbalance of the transformer station and is also a reason for electrifying the grounding wire, particularly in the wet ground environment, the electrification of the grounding wire is not exhaustive, the safety problems of people and animals around the transformer are caused, the current modes of checking the electrification of the grounding wire (network) are all measured by an electroscope or a multimeter, in actual operation, however, the ground line is not required to be measured when every voltage transformer works, and the voltage transformer needs to be charged for certain operations of measurement, meanwhile, the agricultural and livestock events in rural areas cannot be well reminded, and the loss of metering and potential safety hazards cannot be well reduced.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The invention is provided in view of the problem that the tool size of the existing distribution transformer grounding wire live detection device is fixed and cannot be adjusted.

Therefore, the invention aims to provide a distribution transformer grounding wire live detection device.

In order to solve the technical problems, the invention provides the following technical scheme: a device for detecting the electrification of a grounding wire of a distribution transformer comprises,

a housing;

the detection assembly is positioned in the shell, and the acquisition end of the detection assembly is positioned outside the shell; and the number of the first and second groups,

the locking piece is hinged outside the shell, an accommodating space is formed between the locking piece and the shell, and the acquisition end is positioned in the accommodating space;

and the shell is also provided with a driving component for driving the locking piece to rotate.

As a preferred scheme of the distribution transformer grounding wire live detection device of the present invention, wherein: the driving assembly comprises a supporting piece and a rotating piece, the supporting piece is connected with the shell, the rotating piece is rotatably connected with the supporting piece, and the rotating piece is fixedly connected with the locking piece through a rotating shaft.

As a preferred scheme of the distribution transformer grounding wire live detection device of the present invention, wherein: an accommodating cavity is formed in the supporting piece, and the rotating piece rotates in the accommodating cavity;

wherein, the end of the rotating part is positioned in the accommodating cavity.

As a preferred scheme of the distribution transformer grounding wire live detection device of the present invention, wherein: the end part of the rotating part is in a conical shape which is contracted towards the outside of the accommodating cavity;

wherein, still be equipped with the operation groove on the rotating member.

As a preferred scheme of the distribution transformer grounding wire live detection device of the present invention, wherein: the rotating part comprises a base part and a limiting part, the base part is connected with the bearing in the accommodating cavity, the limiting part is movably connected with a sliding column on the base part, and the limiting part can only move linearly along the sliding column;

the support piece is also provided with a limiting assembly for limiting the rotating piece to rotate;

wherein a spring is connected between the base member and the limiting member.

As a preferred scheme of the distribution transformer grounding wire live detection device of the present invention, wherein: the limiting assembly comprises a limiting tooth positioned on the limiting piece and a limiting ring positioned in the accommodating cavity, a limiting groove matched with the limiting tooth is formed in the limiting ring, a gap is reserved between the limiting ring and the bottom of the accommodating cavity, and the length of the gap is larger than that of the limiting tooth.

As a preferred scheme of the distribution transformer grounding wire live detection device of the present invention, wherein: the limiting teeth are gears sleeved on the outer side of the rotating part, and the number of the limiting grooves is matched with that of the gears.

As a preferable scheme of the distribution transformer grounding wire live detection device of the present invention, wherein: the side wall of the supporting piece is also provided with an elastic cone at the gap, and the elastic cone is positioned between two adjacent teeth of the gear.

As a preferred scheme of the distribution transformer grounding wire live detection device of the present invention, wherein: the side wall of the supporting piece is provided with a radial hole, the elastic cone comprises a cone block, an elastic piece and a limiting block, the cone block slides in the radial hole and is positioned between two adjacent teeth of the gear, and the elastic piece is connected between the cone block and the limiting block;

and the limiting block is in threaded connection with the radial hole.

As a preferred scheme of the distribution transformer grounding wire live detection device of the present invention, wherein: the detection assembly further comprises a diode, an alarm, a display module and a power supply, the acquisition end is connected with the diode, the diode is connected with the alarm, the alarm is connected with the display module, and the power supply is connected with the alarm and the display module.

The invention has the beneficial effects that: the invention can be directly arranged on the grounding wire, can measure the voltage data of the grounding wire in time and feed back the voltage data to the surrounding environment in time, thereby avoiding the occurrence of safety accidents and simultaneously reducing more work for the workers who carry out partial live-line work on the periphery.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the structure of the present invention mounted on a ground wire.

FIG. 3 is a schematic structural diagram of the joint between the driving assembly and the rotating shaft according to the present invention.

Fig. 4 is a schematic view of the half-section structure of fig. 3.

Fig. 5 is a schematic view of a half-section structure of the accommodating cavity of the supporting member of the present invention.

Fig. 6 is a schematic view of the overall structure of the rotating member of the present invention.

Fig. 7 is an exploded view of fig. 6.

Fig. 8 is a schematic structural diagram of the special tool of the present invention.

Fig. 9 is a schematic view of a half-section structure of the present invention when operated by a special tool.

FIG. 10 is a system block diagram of a detection assembly of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Furthermore, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional view illustrating the structure of the device is not enlarged partially according to the general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

Example 1

Referring to fig. 1, 2 and 10, a first embodiment of the present invention provides a distribution transformer ground wire live detection apparatus, which includes a housing 100, a detection assembly 200 and a locking member 300, wherein the detection assembly 200 is located in the housing 100, and a collection end 201 of the detection assembly 200 is located outside the housing 100; one end of the locking piece 300 is hinged outside the shell 100, an accommodating space N1 is formed between the other end of the locking piece 300 and the shell 100, and the collecting end 201 is located in the accommodating space N1; during detection, the grounding wire 600 of the distribution transformer is placed in the accommodating space N1 and is in contact with the acquisition end 201, and if the grounding wire 600 is electrified, the detection assembly 200 gives an alarm to remind workers around the distribution transformer or passers-by;

the driving assembly 400 is further disposed on the housing 100 and is used for operating the locking member 300 to rotate to reduce the size of the opening of the accommodating space N1 to fasten the ground wire 600 in the accommodating space N1, or operating the locking member 300 to rotate to increase the size of the opening of the accommodating space N1 to release the ground wire 600 in the accommodating space N1.

The detection assembly 200 comprises a collection end 201, a diode 202, an alarm 203, a display module 204 and a power supply 205, wherein the collection end 201 is connected with the diode 202, the diode 202 is connected with the alarm 203, the alarm 203 is connected with the display module 204, and the power supply 205 is connected with the alarm 203 and the display module 204; the acquisition end 201 is a conductor which can conduct electricity, the acquisition end 201 can be connected with the diode 202 through a resistor, if the grounding wire 600 is electrified, the alarm 203 is introduced by utilizing the unidirectional conductivity of the diode, and the threshold value is set, the threshold value of the invention is set to be 36V, and the alarm 203 can give an alarm according to whether the grounding wire is electrified or not, and the electrification exceeds 36V or more, so that the alarm plays a role in reminding workers around the distribution transformer or passersby; can direct observation magnitude of voltage through the display module 204 of being connected with alarm 203, make things convenient for the staff to rectify the earth connection according to the value of earth connection line voltage.

Example 2

Referring to fig. 3 to 4, this embodiment is different from the first embodiment in that: the driving assembly 400 includes a supporting member 401 and a rotating member 402, the supporting member 401 is connected and fixed with the casing 100, the rotating member 402 is rotatably connected with the supporting member 401, the rotating member 402 is fixedly connected with the locking member 300 through a rotating shaft 403, and the rotating shaft 403 is rotatably connected with the supporting member 401, that is, the locking member 300 can rotate on the supporting member 401 through the rotating shaft 403 to increase or decrease the size of the opening of the accommodating space N1.

Specifically, the supporting member 401 is provided with an accommodating cavity N2 therein, one end of the accommodating cavity N2 is open, and the rotating member 402 rotates in the accommodating cavity N2, wherein the end of the rotating member 402 is located in the opening of the accommodating cavity N2, that is, the rotating member 402 is entirely hidden in the accommodating cavity N2, so that it is difficult for a general tool to operate the rotating member 402 to rotate, and thus it is difficult for the general tool to rotate the locking member 300, and after the detecting device of the present invention is installed on the ground wire 600, it is difficult for the locking member 300 to be opened without a special tool 500, thereby playing a role of theft prevention to a certain extent.

Example 3

Referring to fig. 3 to 7, this embodiment is different from the above embodiment in that: the rotating member 402 comprises a base member 402a and a limiting member 402b, the base member 402a is connected with a bearing in the accommodating cavity N2, the base member 402a can rotate in the accommodating cavity N2 through the bearing, and the bearing is located at the bottom position in the accommodating cavity N2; the limiting piece 402b is movably connected with a sliding column 402a-1 on the base piece 402a, the limiting piece 402b can only move linearly along the sliding column 402a-1, the limiting piece 402b can only move axially on the sliding column 402a-1 and cannot rotate circumferentially, and the base piece 402a can be driven by the sliding column 402a-1 to rotate in the accommodating cavity N2 through a bearing by rotating the limiting piece 402 b;

specifically, the sliding column 402a-1 can be a square column or a column with a multi-deformation section, as shown in the figure, the sliding column 402a-1 is formed by arranging a guide groove on the outer wall of a column, a moving cavity N6 is arranged in a limiting piece 402b, and the moving cavity N6 is matched with the sliding column 402a-1 in shape;

wherein, the supporting member 401 is further provided with a limiting component 404 for limiting the rotation of the rotating member 402, and when the limiting component 402b is matched with the limiting component 404 along with the movement of the limiting component 402b on the sliding column 402a-1, the limiting component 402b can not rotate, thereby realizing the purpose that the whole rotating member 402 can not rotate; with the movement of the limiting member 402b on the sliding column 402a-1, when the limiting member 402b is disengaged from the limiting member 404, the limiting member 404 is unrestrained, and the limiting member 402b is free to rotate, i.e., the entire rotating member 402 is free to rotate, and the locking member 300 can be operated to rotate.

It should be noted that, a spring 402c is connected between the base member 402a and the limiting member 402b, and the pre-tightening force of the spring 402c can move the limiting member 402b to a position where it is matched with the limiting component 404, i.e. an initial position, at which the locking member 300 is in a locked state and cannot rotate; the lock 300 can only be operated to rotate when the spring 402c is compressed to disengage the restricting member 402b from the restricting member 404 by operation of the special tool 500.

Furthermore, in order to improve the anti-theft effect and further increase the operation difficulty of the general tool, the end of the limiting piece 402b is tapered to shrink outward of the accommodating cavity N2, the contact area of the tapered end is small, and the general tool is difficult to push the limiting piece 402b to move towards the direction of the compression spring 402c integrally through the tapered end; the limiting piece 402b is further provided with an operation groove N3, the operation groove N3 extends axially integrally, the operation groove N3 forms an opening towards the outer side of the accommodating cavity N2, the operation groove N3 is used for operation of a professional tool, and the limiting piece 402b can be operated in a rotating mode through mutual matching with the operation groove N3.

Example 4

Referring to fig. 8 and 9, this embodiment is different from the above embodiment in that: the special tool 500 comprises a cylinder body 501 and a handle 502, wherein the cylinder body 501 is provided with an inner cavity N7 capable of accommodating the limiting piece 402b, and the inner wall of the inner cavity N7 is provided with a key block 501a capable of being matched with the operation groove N3;

during specific operation, the cylinder body 501 extends into the accommodating cavity N2, the key block 501a extends into the operation groove N3, the cylinder body 501 continues to move, the cylinder body 501 pushes the limiting piece 402b to integrally move towards the direction of the compression spring 402c until the limiting piece 402b is separated from the limiting component 404, the limiting piece 402b can freely rotate, at the moment, the cylinder body 501 is operated by the handle 502 to rotate, and the limiting piece 402b can be driven to rotate by the key block 501a, so that the locking piece 300 can rotate.

Example 5

Referring to fig. 3 to 7, this embodiment is different from the above embodiment in that: the limiting assembly 404 comprises a limiting tooth 404a positioned on the limiting piece 402b and a limiting ring 404b positioned in the accommodating cavity N2, the inner diameter of the limiting ring 404b is larger than that of the limiting piece 402b, the limiting piece 402b can pass through the limiting tooth 404b, a limiting groove N4 matched with the limiting tooth 404a is arranged in the limiting ring 404b, the limiting groove N4 is positioned on the inner wall of the limiting ring 404b and extends along the axial direction, the limiting tooth 404a is positioned outside the limiting piece 402b and extends along the axial direction, and when the limiting tooth 404a extends into the limiting groove N4, the limiting piece 402b can be limited from rotating;

it should be noted that, a gap is left between the limiting ring 404b and the bottom of the accommodating cavity N2, the axial length of the gap is greater than the axial length of the limiting tooth 404a, and when the limiting piece 402b moves towards the direction of the compression spring 402c until the limiting tooth 404a is completely located in the gap, the limiting tooth 404a is disengaged from the limiting groove N4, and at this time, the limiting ring 404b can be operated to rotate.

The limiting piece 402b can be reset under the pre-tightening force of the spring 402c, so that the limiting tooth 404a extends into the limiting groove N4, and the rotation limitation of the limiting piece 402b is realized.

Example 6

Referring to fig. 3 to 9, this embodiment is different from the above embodiment in that: the limiting teeth 404a are gears sleeved outside the limiting pieces 402b, the gears are fixedly connected with the limiting pieces 402b, the overall diameter of the gears is matched with the inner diameter of the limiting rings 404b, the number of the limiting grooves N4 is matched with the number of the teeth of the gears, the larger the number of the teeth of the gears is, the easier the limiting teeth 404a enter the limiting grooves N4 in the rotating process of the limiting pieces 402 b.

Furthermore, an elastic cone 401a is further arranged on the side wall of the supporting member 401 at the gap, the elastic cone 401a is arranged between two adjacent teeth of the gear, and in the rotating process of the limiting piece 402b, the limiting piece 402b can rotate once at the angle of a single tooth under the action of the elastic cone 401a, so that the angle of each rotation is ensured to be fixed, and therefore the limiting tooth 404a always corresponds to the position of the limiting groove N4 in the rotating process, and after the external force is removed, the limiting tooth 404a can directly enter the limiting groove N4 under the pre-tightening force of the spring 402 c.

It should be noted that the axial length of the limiting tooth 404a, preferably the axial length of the tooth on the gear is greater than the moving distance of the limiting piece 402b on the sliding column 402a-1, that is, during the moving of the limiting piece 402b, the elastic cone 401a is always located between two adjacent teeth of the gear, that is, when the pre-tightening force of the spring 402c pushes the limiting tooth 404a into the limiting groove N4, a part of the limiting tooth 404a is located outside the limiting groove N4, the elastic cone 401a is installed to contact the limiting tooth 404a located outside the limiting groove N4, and when the limiting piece 402b moves on the sliding column 402a-1, the elastic cone 401a can also play a guiding role.

Specifically, the elastic cone 401a can adopt a conventional technical means, a radial hole N5 is formed in the side wall of the support member 401, the elastic cone 401a includes a cone block 401a-1, an elastic member 401a-2 and a limit block 401a-3, the cone block 401a-1 slides in the radial hole N5 and is located between two adjacent teeth of the gear, and the elastic member 401a-2 is connected between the cone block 401a-1 and the limit block 401 a-3; when the tooth crest contacts the conical block 401a-1, the conical block 401a-1 is pushed to compress the elastic piece 401a-2 to move, when the tooth crest is positioned at the tooth trough, the elastic piece 401a-2 pushes the conical block 401a-1 to reset, and so on, so that the angle of each rotation is ensured to be fixed;

the limiting block 401a-3 is in threaded connection with the radial hole N5, the pretightening force of the elastic piece 401a-2 can be adjusted by rotating the limiting block 401a-3, and the rotating force of the limiting piece 402b can be adjusted.

The working principle of the invention is as follows:

during installation, the cylinder 501 of the special tool 500 extends into the accommodating cavity N2, the key block 501a extends into the operation groove N3, the cylinder 501 continues to move, the cylinder 501 contacts with a gear and then pushes the limiting piece 402b to integrally move towards the direction of the compression spring 402c until the limiting piece 402b is separated from the limiting component 404, the limiting piece 402b can freely rotate, at this time, the cylinder 501 is operated to rotate through the handle 502, the limiting piece 402b can be driven to rotate through the key block 501a, the limiting piece 402b drives the base piece 402a to rotate in the accommodating cavity N2 through the bearing through the sliding column 402a-1, the rotating shaft drives the locking piece 300 to rotate to increase the opening size of the accommodating space N1, and the grounding wire 600 of the distribution transformer is placed in the accommodating space N1 and is contacted with the acquisition end 403;

the limiting piece 402b can rotate once at the angle of a single tooth through the action of the elastic cone 401a, and the angle of each rotation is ensured to be fixed, so that the limiting tooth 404a always corresponds to the position of the limiting groove N4 in the rotation process;

the handle 502 is rotated reversely until the locking piece 300 presses the grounding wire 600 of the distribution transformer in the accommodating space N1, the special tool 500 is withdrawn at the moment, the pre-tightening force of the spring 402c pushes the limiting teeth 404a to enter the limiting groove N4, the rotation limitation of the locking piece 300 is realized, the locking piece 300 is in a locking state at the moment, if the special tool 500 is not available, the limiting piece 402b is difficult to push to move integrally to the direction of compressing the spring 402c and rotate the limiting piece 402b through the conical end part by adopting a common tool, and a certain anti-theft function is achieved.

If the grounding wire 600 is electrified, the alarm 203 is introduced by utilizing the unidirectional conductivity of the diode, and the threshold value is set, the threshold value of the invention is set to be 36V, and the alarm 203 can give an alarm according to whether the grounding wire is electrified or not and the electrification exceeds 36V or more, thereby playing a role in reminding workers around the distribution transformer or passers-by; the voltage value can be directly observed through the display module 204 connected with the alarm 203, and the worker can conveniently modify the grounding wire according to the value of the grounding wire voltage.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. The utility model provides a distribution transformer earth connection live detection device which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

a housing (100);

a detection assembly (200) located within the housing (100), a collection end (201) of the detection assembly (200) being located outside the housing (100); and the number of the first and second groups,

the locking piece (300) is hinged outside the shell (100), an accommodating space (N1) is formed between the locking piece (300) and the shell (100), and the acquisition end (201) is positioned in the accommodating space (N1);

wherein, the shell (100) is also provided with a driving component (400) for driving the locking piece (300) to rotate;

the driving assembly (400) comprises a supporting piece (401) and a rotating piece (402), the supporting piece (401) is connected with the shell (100), the rotating piece (402) is rotatably connected with the supporting piece (401), and the rotating piece (402) is fixedly connected with the locking piece (300) through a rotating shaft (403);

an accommodating cavity (N2) is formed in the supporting piece (401), and the rotating piece (402) rotates in the accommodating cavity (N2);

wherein the end of the rotating member (402) is positioned in the accommodating cavity (N2);

the rotating member (402) comprises a base member (402 a) and a limiting member (402 b), the base member (402 a) is connected with a bearing in the accommodating cavity (N2), the limiting member (402 b) is movably connected with a sliding column (402 a-1) on the base member (402 a), and the limiting member (402 b) can only move linearly along the sliding column (402 a-1);

wherein the supporting member (401) is further provided with a limiting assembly (404) for limiting the rotating member (402) to rotate;

wherein a spring (402 c) is connected between the base member (402 a) and the limiting member (402 b).

2. The distribution transformer ground wire live detection device of claim 1, characterized in that: the end part of the rotating piece (402) is in a conical shape which is contracted towards the outside of the accommodating cavity (N2);

wherein, the rotating member (402) is also provided with an operation groove (N3).

3. The distribution transformer ground wire electrification detecting device according to claim 1 or 2, characterized in that: the limiting assembly (404) comprises a limiting tooth (404 a) positioned on the limiting piece (402 b) and a limiting ring (404 b) positioned in the accommodating cavity (N2), a limiting groove (N4) matched with the limiting tooth (404 a) is formed in the limiting ring (404 b), a gap is reserved between the limiting ring (404 b) and the bottom of the accommodating cavity (N2), and the length of the gap is larger than that of the limiting tooth (404 a).

4. The distribution transformer ground wire live detection device of claim 3, characterized in that: the limiting teeth (404 a) are gears sleeved on the outer side of the rotating piece (402), and the number of the limiting grooves (N4) is matched with that of the gears.

5. The distribution transformer ground wire live detection device of claim 4, wherein: an elastic cone (401 a) is further arranged on the side wall of the supporting piece (401) at the gap, and the elastic cone (401 a) is located between two adjacent teeth of the gear.

6. The distribution transformer ground wire live detection device of claim 5, characterized in that: a radial hole (N5) is formed in the side wall of the support member (401), the elastic cone (401 a) comprises a cone block (401 a-1), an elastic member (401 a-2) and a limit block (401 a-3), the cone block (401 a-1) slides in the radial hole (N5) and is located between two adjacent teeth of the gear, and the elastic member (401 a-2) is connected between the cone block (401 a-1) and the limit block (401 a-3);

wherein the limiting blocks (401 a-3) are in threaded connection with the radial hole (N5).

7. The distribution transformer grounding wire electrification detecting device as recited in any one of claims 1, 2 and 4 to 6, wherein: detection element (200) still include diode (202), alarm (203), display module (204) and power (205), gather end (201) with diode (202) link to each other, diode (202) with alarm (203) link to each other, alarm (203) with display module (204) link to each other, power (205) with alarm (203) with display module (204) link to each other.