CN112485501B

CN112485501B - Distribution transformer earth connection alarm device

Info

Publication number: CN112485501B
Application number: CN202011314174.7A
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: 2022-08-19
Anticipated expiration: 2040-11-20
Also published as: CN112485501A

Abstract

The invention discloses a grounding wire alarm device of a distribution transformer, which comprises a contact element, a grounding wire and a grounding wire, wherein the contact element is a conductor and is used for contacting with the grounding wire; the contact piece is connected with a leading-in end of the diode; the alarm is used for detecting the voltage of the grounding wire and sending alarm information, and is connected with the leading-out end of the diode; the display module is used for displaying the voltage value of the detected grounding wire and is connected with the alarm; and if the voltage of the grounding wire is detected to be greater than the threshold value, an alarm sends alarm information. 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 perform partial live-line work to the surrounding.

Description

Distribution transformer earth connection alarm device

Technical Field

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

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 charged grounding wires due to long erection time, serious corrosion of grounding grids and long-term load imbalance caused neutral point displacement, and with the increase of the transformation transformers in recent years, the load divided by the rural power grid has most of the load unbalance of the transformer, which is also a reason for electrifying the grounding wire, particularly in the wet weather environment on the ground, the electrification of the grounding wire is rather inexhaustible to the safety problem of people and livestock around the transformer, the current method for checking the electrification of the grounding wire (network) is to use an electroscope pen or a multimeter for measurement, however, in actual work, the ground wire is not required to be measured when each voltage device works, and the voltage measuring device is required to be electrified when some work of measurement is required, 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 alarm device is fixed and cannot be adjusted.

Therefore, the invention aims to provide a grounding wire alarm device of a distribution transformer.

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

the contact piece is a conductor and is used for being in contact with a grounding wire;

the contact piece is connected with a leading-in end of the diode;

the alarm is used for detecting the voltage of the grounding wire and sending alarm information, and is connected with the leading-out end of the diode; and (c) a second step of,

the display module is used for displaying and detecting the voltage value of the grounding wire and is connected with the alarm;

a threshold value is preset, and if the voltage of the grounding wire is detected to be larger than the threshold value, an alarm sends alarm information.

As a preferred scheme of the grounding wire alarm device of the distribution transformer of the present invention, wherein: the diode and the alarm are positioned in the shell, and the display module is positioned on the surface of the shell;

the shell is hinged to the shell, an accommodating space is formed between the locking piece and the shell, and the contact piece 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 preferable scheme of the distribution transformer grounding wire alarm device of the present invention, wherein: the middle part of the locking piece is rotationally connected with the shell through a hinge shaft;

the driving assembly comprises a push rod and an operating assembly, the operating assembly can drive the push rod to move, the push rod is in contact with one end of the locking piece, and the locking piece can be pushed to rotate around the hinge shaft.

As a preferable scheme of the distribution transformer grounding wire alarm device of the present invention, wherein: the operating 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 push rod is in threaded connection with the rotating piece;

the shell is provided with a moving cavity for accommodating the push rod in a penetrating mode, and the push rod can only move linearly in the moving cavity.

As a preferable scheme of the distribution transformer grounding wire alarm 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 piece is positioned in the accommodating cavity.

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

wherein, the supporting piece is also provided with a limiting component for limiting the rotation of the rotating piece;

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

As a preferred scheme of the grounding wire alarm device of the distribution transformer 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 grounding wire alarm device of the distribution transformer 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 preferable scheme of the distribution transformer grounding wire alarm 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 preferred scheme of the grounding wire alarm device of the distribution transformer 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.

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 perform partial live-line work to the surrounding.

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 structural diagram of the grounding wire of the present invention.

Fig. 3 is a schematic structural view of the operating assembly of the present invention when separated from the housing.

Fig. 4 is a schematic structural view of the housing of the present invention.

FIG. 5 is a schematic view of a half-section of the joint between the operating assembly and the push rod according to the present invention.

Fig. 6 is a schematic half-sectional view of the accommodating chamber of the supporting member of the present invention.

Fig. 7 is a schematic overall structure diagram of the rotating member of the present invention.

Fig. 8 is an exploded view of fig. 7.

Fig. 9 is a schematic structural view of the push rod of the present invention.

Fig. 10 is a schematic structural diagram of the special tool of the present invention.

FIG. 11 is a schematic view of a half-section of the present invention as it is operated by a special tool.

Fig. 12 is a system block diagram of the alarm device 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, however, the present invention may be practiced otherwise than as specifically described herein, and it will be appreciated by those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the present invention and that the present invention is not limited by 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 for convenience of illustration, the cross-sectional views illustrating the device structures are not enlarged partially according to the general scale when describing the embodiments of the present invention, and the drawings are only exemplary, which should not limit 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. 12, a first embodiment of the present invention provides a grounding wire alarm device for a distribution transformer, which comprises a contact 100, a diode 200, an alarm 300 and a display module 400; the contact 100 is a conductor capable of conducting electricity and is used for being in contact with the grounding wire 800; the contact 100 is connected to the leading-in terminal of the diode 200 via a resistor; the alarm 300 is used for detecting the voltage of the grounding wire 800 and sending alarm information, and the alarm 300 is connected with the leading-out end of the diode 200; the display module 400 is used for displaying the voltage value of the detection ground wire 800, and the display module 400 is connected with the alarm 300;

a threshold value is preset, and if the voltage of the ground wire 800 is detected to be greater than the threshold value, the alarm 300 sends alarm information;

if the grounding wire 800 is electrified, the alarm 300 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 300 gives an alarm to remind workers around the distribution transformer or passers-by according to whether the grounding wire is electrified or not and the electrification exceeds 36V or more; can direct observation magnitude of voltage through the display module 400 who is connected with alarm 300, make things convenient for the staff to rectify the earth connection according to the value of earth connection line voltage.

It should be noted that the alarm device further comprises a power supply 900 for supplying power to the alarm device 300 and the display module 400.

Example 2

Referring to fig. 1 to 4, this embodiment is different from the first embodiment in that: the LED display module further comprises a shell 500, wherein the diode 200, the alarm 300 and the power supply 900 are positioned in the shell 500, the display module 400 is positioned on the surface of the shell 500, and the contact piece 100 is positioned outside the shell 500;

the shell 500 is further provided with a locking member 501, the locking member 501 is hinged to the shell 500, an accommodating space N1 is formed between the locking member 501 and the shell 500, and the contact element 100 is located in the accommodating space N1; during detection, the grounding wire 800 of the distribution transformer is placed in the accommodating space N1 and is in contact with the contact element 100, if the grounding wire 800 is electrified, the alarm 300 is introduced by utilizing the unidirectional conductivity of the diode, and a threshold value is set, wherein the threshold value of the invention is set to be 36V, and the alarm 300 gives an alarm to remind workers around the distribution transformer or passers-by according to whether the grounding wire is electrified or not and if the grounding wire is electrified and the electrification exceeds 36V or more; can direct observation magnitude of voltage through the display module 400 who is connected with alarm 300, make things convenient for the staff to rectify the earth connection according to the value of earth connection line voltage.

The housing 500 is further provided with a driving assembly 600 for driving the locking member 501 to rotate, the driving assembly 600 is used for operating the locking member 501 to rotate to reduce the size of the opening of the accommodating space N1 to fasten the grounding wire 800 in the accommodating space N1, or operating the locking member 501 to rotate to increase the size of the opening of the accommodating space N1 to release the grounding wire 800 in the accommodating space N1.

Example 3

Referring to fig. 3 to 5, this embodiment is different from the above embodiment in that: the middle part of the locking piece 501 is rotatably connected with the shell 500 through a hinge shaft 502; wherein, the driving assembly 600 comprises a push rod 601 and an operating assembly 602, the operating assembly 602 can drive the push rod 601 to move, the push rod 601 is in contact with one end of the locking member 501, and can push the locking member 501 to rotate around the hinge shaft 502.

Specifically, the operating assembly 602 includes a supporting member 602a and a rotating member 602b, the supporting member 602a is connected to the housing 500, the rotating member 602b is rotatably connected to the supporting member 602a, and the push rod 601 is threadedly connected to the rotating member 602 b;

wherein, the housing 500 is provided with a moving chamber N2 for accommodating the push rod 601 in a penetrating way, and the push rod 601 can only move linearly in the moving chamber N2; specifically, the push rod 601 may be a square column or a column with a multi-deformation cross section, as shown in the figure, the push rod 601 is provided with a guide groove on the outer wall of the column, and the moving cavity N2 is matched with the shape of the push rod 601;

by rotating the rotating member 602b, under the action of the screw thread, the push rod 601 can be driven to linearly move in the moving cavity N2, the push rod 601 contacts one end of the locking member 501 and pushes the locking member 501 to rotate around the hinge shaft 502 until the size of the opening of the accommodating space N1 is reduced to fasten the ground wire 800 in the accommodating space N1;

it should be noted that a torsion spring (not shown) is further connected between the locking member 501 and the housing 500, and when the push rod 601 is moved in the reverse direction, the locking member 501 is reset by the torsion spring to increase the opening size of the accommodating space N1 to release the grounding wire 800 in the accommodating space N1.

Example 4

Referring to fig. 5, this embodiment differs from the above embodiment in that: the supporting piece 602a is internally provided with an accommodating cavity N3, one end of the accommodating cavity N3 is opened, and the rotating piece 602b rotates in the accommodating cavity N3; the end of the rotating element 602b is located in the accommodating cavity N3, that is, the rotating element 602b is entirely hidden in the accommodating cavity N3, so that it is difficult for a general tool to operate the rotating element 602b to rotate, and thus it is difficult for the general tool to rotate the locking element 501.

Example 5

Referring to fig. 5 to 9, this embodiment is different from the above embodiment in that: the rotating part 602b comprises a base piece 602b-1 and a limiting piece 602b-2, the base piece 602b-1 is connected with a bearing in the accommodating cavity N3, the base piece 602b-1 can rotate in the accommodating cavity N3 through the bearing, wherein the bearing is located at the bottom in the accommodating cavity N3, a threaded cavity N7 is arranged in the base piece 602b-1, a stud 601a is arranged at the end of the push rod 601, and the push rod 601 is in threaded connection with the threaded cavity N7 through the stud 601 a; the limiting piece 602b-2 is movably connected with a sliding column 602b-3 on the base piece 602b-1, the limiting piece 602b-2 can only move linearly along the sliding column 602b-3, the limiting piece 602b-2 can only move axially on the sliding column 602b-3 and cannot rotate circumferentially, and the base piece 602b-1 can be driven by the sliding column 602b-3 to rotate in the accommodating cavity N3 through rotating the limiting piece 602 b-2;

specifically, the sliding column 602b-3 may be a square column or a column with a multi-deformation cross section, as shown in the figure, the sliding column 602b-3 is formed by forming a guide groove on the outer wall of a cylinder, the limiting piece 602b-2 is internally provided with a moving cavity N6, and the moving cavity N6 is matched with the shape of the sliding column 602 b-3;

wherein, the supporting member 602a is further provided with a limiting component 602c for limiting the rotation of the rotating member 602 b; with the movement of the limiting member 602b-2 on the sliding column 602b-3, when the limiting member 602b-2 and the limiting component 602c are engaged with each other, the limiting member 602b-2 cannot rotate, so that the purpose that the whole rotating member 602b cannot rotate is achieved; with the movement of the restriction member 602b-2 on the spool 602b-3, when the restriction member 602b-2 is disengaged from the restriction member 602c, the restriction member 602c is unrestrained, and the restriction member 602b-2 is free to rotate, i.e., the entire rotating member 602b is free to rotate, and the locking member 501 is operated to rotate.

It should be noted that, a spring 602b-4 is connected between the base member 602b-1 and the limiting member 602b-2, and the pre-tightening force of the spring 602b-4 can move the limiting member 602b-2 to a position cooperating with the limiting member 602c, i.e. an initial position, at which the locking member 501 is in a locked state and cannot rotate; the locking member 501 is only operable to rotate when the spring 602b-4 is compressed by the special tool 700 to disengage the restricting member 602b-2 from the restricting member 602 c.

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 602b-2 is tapered towards the outside of the accommodating cavity N3, the contact area of the tapered end is small, and the general tool is difficult to push the limiting piece 602b-2 to move towards the direction of the compression spring 602b-4 integrally through the tapered end; the limiting piece 602b-2 is further provided with an operation groove N4, the operation groove N4 extends axially as a whole, the operation groove N4 forms an opening towards the outer side of the accommodating cavity N3, the operation groove N4 is used for professional tool operation, and the limiting piece 602b-2 can be rotationally operated by being matched with the operation groove N4.

Example 6

Referring to fig. 10 and 11, this embodiment is different from the above embodiment in that: the special tool 700 comprises a cylinder 701 and a handle 702, wherein the cylinder 701 is provided with an inner cavity N9 capable of accommodating the limiting piece 602b-2, and the inner wall of the inner cavity N9 is provided with a key block 701a capable of being matched with the operation groove N4;

during specific operation, the cylinder 701 extends into the accommodating cavity N3, the key block 701a extends into the operation groove N4, the cylinder 701 continues to move, the cylinder 701 pushes the limiting piece 602b-2 to integrally move towards the direction of the compression spring 602b-4 until the limiting piece 602b-2 is separated from the limiting component 602c, the limiting piece 602b-2 can freely rotate, at the moment, the cylinder 701 is operated to rotate through the handle 702, and the limiting piece 602b-2 can be driven to rotate through the key block 701a, so that the locking piece 501 rotates.

Example 7

Referring to fig. 5 to 11, this embodiment is different from the above embodiment in that: the limiting assembly 602c comprises a limiting tooth 602c-1 positioned on the limiting piece 602b-2 and a limiting ring 602c-2 positioned in the accommodating cavity N3, the limiting ring 602c-2 has an inner diameter larger than that of the limiting piece 602b-2 and can be penetrated by the limiting piece 602b-2, a limiting groove N5 matched with the limiting tooth 602c-1 is arranged in the limiting ring 602c-2, the limiting groove N5 is positioned on the inner wall of the limiting ring 602c-2 and extends along the axial direction, the limiting tooth 602c-1 is positioned outside the limiting piece 602b-2 and extends along the axial direction, and when the limiting tooth 602c-1 extends into the limiting groove N5, the limiting piece 602b-2 can be limited from rotating;

it should be noted that, a gap is left between the limiting ring 602c-2 and the bottom of the receiving cavity N3, the axial length of the gap is greater than the axial length of the limiting tooth 602c-1, and when the limiting piece 602b-2 moves towards the direction of the compression spring 602b-4 until the limiting tooth 602c-1 is completely located in the gap, the limiting tooth 602c-1 is disengaged from the limiting groove N5, and then the limiting ring 602c-2 can be operated to rotate.

The limiting piece 602b-2 can be reset under the pretightening force of the spring 602b-4, so that the limiting tooth 602c-1 extends into the limiting groove N5, and the rotation limitation of the limiting piece 602b-2 is realized.

Example 8

Referring to fig. 5 to 11, this embodiment is different from the above embodiment in that: the limiting teeth 602c-1 are gears sleeved outside the limiting pieces 602b-2, the gears are fixedly connected with the limiting pieces 602b-2, the overall diameter of the gears is matched with the inner diameter of the limiting rings 602c-2, the number of the limiting grooves N5 is matched with the number of the teeth of the gears, the number of the teeth of the gears is increased, and the limiting teeth 602c-1 can enter the limiting grooves N5 more easily in the rotating process of the limiting pieces 602 b-2.

Furthermore, an elastic cone 602a-1 is further arranged on the side wall of the supporting member 602a at the gap, the elastic cone 602a-1 is located between two adjacent teeth of the gear, and during the rotation of the limiting member 602b-2, the limiting member 602b-2 can rotate once at the angle of a single tooth through the action of the elastic cone 602a-1, so as to ensure that the angle of each rotation is fixed, so that the limiting tooth 602c-1 always corresponds to the position of the limiting groove N5 during the rotation, and after the external force is removed, the limiting tooth 602c-1 can directly enter the limiting groove N5 under the pre-tightening force of the spring 602 b-4.

It should be noted that the axial length of the limiting tooth 602c-1, preferably the axial length of the tooth on the gear, is greater than the moving distance of the limiting piece 602b-2 on the sliding column 602b-3, that is, during the moving of the limiting piece 602b-2, the elastic cone 602a-1 is always located between two adjacent teeth of the gear, that is, when the pre-tightening force of the spring 602b-4 pushes the limiting tooth 602c-1 into the limiting groove N5, a part of the limiting tooth 602c-1 is located outside the limiting groove N5, the elastic cone 602a-1 is installed at the position to contact the limiting tooth 602c-1 located outside the limiting groove N5, and when the limiting piece 602b-2 moves on the sliding column 602b-3, the elastic cone 602a-1 can also play a guiding role.

Specifically, the elastic cone 602a-1 can adopt a conventional technical means, a radial hole N8 is formed in the side wall of the supporting piece 602a, the elastic cone 602a-1 comprises a cone block 602a-1a, an elastic piece 602a-1b and a limiting block 602a-1c, the cone block 602a-1a slides in the radial hole N8 and is located between two adjacent teeth of the gear, and the elastic piece 602a-1b is connected between the cone block 602a-1a and the limiting block 602a-1 c; when the tooth crest contacts the conical block 602a-1a, the conical block 602a-1a is pushed to compress the elastic piece 602a-1b to move, when the tooth crest is positioned at the tooth trough, the elastic piece 602a-1b pushes the conical block 602a-1a to reset, and so on, so that the angle of each rotation is ensured to be fixed;

the limiting blocks 602a to 1c are in threaded connection with the radial holes N8, the pretightening force of the elastic pieces 602a to 1b can be adjusted by rotating the limiting blocks 602a to 1c, and the rotating force of the limiting pieces 602b to 2 can be adjusted.

The working principle of the invention is as follows:

when the special tool is installed, the grounding wire 800 of the distribution transformer is placed in the accommodating space N1 and is in contact with the contact element 100, the cylinder 701 of the special tool 700 extends into the accommodating cavity N3, the key block 701a extends into the operation groove N3, the cylinder 701 is continuously moved, the cylinder 701 pushes the limiting piece 602b-2 to integrally move towards the direction of the compression spring 602b-4 after contacting with the gear, until the limiting piece 602b-2 is separated from the limiting component 602c, the limiting piece 602b-2 can freely rotate, at the moment, the cylinder 701 is operated to rotate through the handle 702, the limiting piece 602b-2 can be driven to rotate through the key block 701a, the limiting piece 602b-2 drives the base piece 602b-1 to rotate in the accommodating cavity N3 through the bearing through the sliding column 602b-3, the push rod 601 can be driven to linearly move in the moving cavity N2 under the action of the screw thread, the push rod 601 contacts with one end of the locking piece 501 and pushes the locking piece 501 to rotate around the hinge shaft 502, until the size of the opening of the accommodating space N1 is reduced to fasten the grounding wire 800 in the accommodating space N1;

the limiting piece 602b-2 can rotate once at the angle of a single tooth through the action of the elastic cone 602a-1, and the angle of each rotation is ensured to be fixed, so that the limiting tooth 602c-1 always corresponds to the position of the limiting groove N5 in the rotation process;

at this time, the special tool 700 is withdrawn, the pre-tightening force of the spring 602b-4 pushes the limiting tooth 602c-1 into the limiting groove N5, the rotation limitation of the locking member 501 is realized, at this time, the locking member 501 is in a locked state, and if the special tool 700 is not provided, the general tool is adopted, so that the limiting member 602b-2 is difficult to push the whole limiting member 602b-2 to move towards the direction of compressing the spring 602b-4 and rotate the limiting member 602b-2, and a certain anti-theft function is achieved.

If the grounding wire 800 is electrified, the alarm 300 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 300 gives an alarm to remind workers around the distribution transformer or passers-by according to whether the grounding wire is electrified or not and the electrification exceeds 36V or more; the voltage value can be directly observed through the display module 400 connected with the alarm 300, 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 have been 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 alarm device which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

a contact (100), the contact (100) being a conductor for contacting a ground wire (800);

a diode (200), said contact (100) being connected to a lead-in of said diode (200);

the alarm (300) is used for detecting the voltage of the grounding wire (800) and sending alarm information, and the alarm (300) is connected with the leading-out end of the diode (200); and the number of the first and second groups,

the display module (400) is used for displaying the voltage value of the grounding wire (800), and the display module (400) is connected with the alarm (300);

a threshold value is preset, and if the voltage of the grounding wire (800) is detected to be greater than the threshold value, an alarm (300) sends alarm information;

the LED alarm further comprises a shell (500), the diode (200) and the alarm (300) are positioned in the shell (500), and the display module (400) is positioned on the surface of the shell (500);

the shell (500) is further provided with a locking piece (501), the locking piece (501) is hinged to the shell (500), an accommodating space (N1) is formed between the locking piece (501) and the shell (500), and the contact piece (100) is located in the accommodating space (N1);

wherein, a driving component (600) for driving the locking piece (501) to rotate is also arranged on the shell (500);

the middle part of the locking piece (501) is rotationally connected with the shell (500) through a hinge shaft (502);

wherein the driving assembly (600) comprises a push rod (601) and an operating assembly (602), the operating assembly (602) can drive the push rod (601) to move, the push rod (601) is contacted with one end of the locking piece (501) and can push the locking piece (501) to rotate around the hinge shaft (502);

the operating assembly (602) comprises a supporting piece (602 a) and a rotating piece (602 b), the supporting piece (602 a) is connected with the shell (500), the rotating piece (602 b) is rotatably connected with the supporting piece (602 a), and the push rod (601) is in threaded connection with the rotating piece (602 b);

wherein, the shell (500) is provided with a moving cavity (N2) for accommodating the push rod (601) in a penetrating way, and the push rod (601) can only move linearly in the moving cavity (N2);

an accommodating cavity (N3) is formed in the supporting piece (602 a), and the rotating piece (602 b) rotates in the accommodating cavity (N3);

wherein the end of the rotating piece (602 b) is positioned in the accommodating cavity (N3);

the rotating member (602 b) comprises a base member (602 b-1) and a limiting member (602 b-2), the base member (602 b-1) is connected with a bearing in the accommodating cavity (N3), the limiting member (602 b-2) is movably connected with a sliding column (602 b-3) on the base member (602 b-1), and the limiting member (602 b-2) can only move linearly along the sliding column (602 b-3);

wherein the supporting piece (602 a) is further provided with a limiting component (602 c) for limiting the rotating piece (602 b) to rotate;

wherein a spring (602 b-4) is connected between the base member (602 b-1) and the limiting member (602 b-2).

2. The distribution transformer ground wire alarm device of claim 1, wherein: the end part of the rotating piece (602 b) is in a conical shape which is contracted towards the outside of the accommodating cavity (N3);

wherein, the rotating piece (602 b) is also provided with an operation groove (N4).

3. The distribution transformer ground wire alarm device of claim 1 or 2, characterized in that: the limiting assembly (602 c) comprises a limiting tooth (602 c-1) positioned on the limiting piece (602 b-2) and a limiting ring (602 c-2) positioned in the accommodating cavity (N3), a limiting groove (N5) matched with the limiting tooth (602 c-1) is formed in the limiting ring (602 c-2), a gap is reserved between the limiting ring (602 c-2) and the bottom of the accommodating cavity (N3), and the length of the gap is greater than that of the limiting tooth (602 c-1).

4. The distribution transformer ground wire alarm device of claim 3, wherein: the limiting teeth (602 c-1) are gears sleeved on the outer side of the rotating piece (602 b), and the number of the limiting grooves (N5) is matched with that of the gears.

5. The distribution transformer ground wire alarm device of claim 4, wherein: an elastic cone (602 a-1) is further arranged on the side wall of the supporting piece (602 a) at the gap, and the elastic cone (602 a-1) is located between two adjacent teeth of the gear.