A complete set of transformer neutral point grounding gap protection device

Abstract

This utility model provides a complete set of transformer neutral point grounding gap protection devices, including a transformer cabinet and a protection mechanism. The transformer cabinet includes a cabinet body and a cabinet door, with the cabinet door installed on one side of the cabinet body. A mounting plate is symmetrically fixedly connected to the top of the cabinet body. The protection mechanism includes a conductive cylinder and a guide rail. A conductive block is installed on one side of the mounting plate, and the guide rail is fixedly connected to one side of the conductive block. Sliding sleeves are equidistantly distributed and slidably installed on one side of the guide rail. A support column is fixedly connected to one side of the sliding sleeve. The conductive cylinder is fitted onto one side of the support column, and a fixing ring is threadedly connected to one side of the support column. This utility model allows the fixed ring to move by rotating it, and the fixed ring, through a ring slider and a ring rail, drives the conductive cylinder to move up and down. This facilitates adjustment of the conductive cylinder's height according to the installation requirements of the transformer cabinet, allowing the conductive cylinder to adjust the lightning protection range as needed.

Description

Technical Field

[0001] The utility model relates to a gap protection complete set device, in particular to a transformer neutral point grounding gap protection complete set device, belonging to the transformer neutral point protection technical field. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, the secondary coil and the iron core (magnetic core). Its main functions include: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc. The electrical connection method between the neutral point and the earth of a three-phase AC power system is called the neutral point grounding method of the power grid. The neutral point grounding method involves the safety, reliability and economy of the power grid; at the same time, it directly affects the selection of the insulation level of the system equipment, the overvoltage level and the relay protection method, communication interference, etc. Generally speaking, the neutral point grounding method of the power grid is the voltage level of each level of the transformer in the substation. Neutral point grounding method, gap protection refers to a set of gap grounding protection devices for the neutral point of the transformer. With the in-depth research on power neutral point protection, the protection methods of lightning arresters and gap parallel protection are becoming more and more popular in power systems and industrial and mining enterprises. The advantages of gap protection are simple structure, reliability, low operation and maintenance, and it can protect the transformer under power frequency, operation and lightning overvoltage. The disadvantages are that it is difficult to determine the coordination parameters of such a large range of protection under three overvoltages, the discharge dispersion is large, the protection characteristics are general, the power frequency continuous current is large, the arc extinguishing ability is poor, and the gap action will produce chopped waves, which is not good for the insulation of the transformer itself;

[0003] Application No. (CN201921538596.5) discloses a transformer neutral point grounding gap protection device, which uses a sliding slider to adjust the distance between two adjacent groups of lightning rods, adjust the discharge gap, increase practicality, avoid the voltage increase caused by lightning strikes and faults at the neutral point of the transformer, and reduce damage to the transformer. However, when the application is used, because all neutral point lightning protection components have the same horizontal height and the use height is fixed and cannot be adjusted, some neutral point lightning protection components cannot normally perform lightning protection on the transformer cabinet when the transformer cabinet is installed at an angle;

[0004] In order to solve the above technical problems, a transformer neutral point grounding gap protection device is proposed. Utility Model Content

[0005] In view of this, the utility model provides a transformer neutral point grounding gap protection device to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0006] The technical solution of the utility model is implemented as follows: a transformer neutral point grounding gap protection complete set device, including a transformer cabinet and a protection mechanism;

[0007] The transformer cabinet comprises a cabinet body and a cabinet door, wherein the cabinet door is installed on one side of the cabinet body, and a mounting plate is symmetrically fixedly connected to the top of the cabinet body;

[0008] The protection mechanism includes a conductive cylinder and a guide rail, a conductive block is installed on one side of the mounting plate, the guide rail is fixedly connected to one side of the conductive block, a sliding sleeve is equidistantly and slidably installed on one side of the guide rail, a support column is fixedly connected to one side of the sliding sleeve, the conductive cylinder is sleeved on one side of the support column, a fixing ring is threadedly connected to one side of the support column, an annular slide rail is installed on one side of the conductive cylinder, an annular slider is slidably connected to the inside of the annular slide rail, and one side of the annular slider is fixedly connected to the fixing ring.

[0009] Further preferably, an observation window is installed on one side of the cabinet door, and a warning sign is fixedly connected to one side of the cabinet door.

[0010] Further preferably, a heat dissipation groove is integrally formed on one side of the cabinet, and a radiator group is installed on one side inside the heat dissipation groove.

[0011] Further preferably, a conductive connection is passed through one side of the interior of the mounting plate, and one end of the conductive connection is fixedly connected to the conductive block.

[0012] Further preferably, a partition is symmetrically fixedly connected to one side of the cabinet, a limiting sleeve is sleeved on one side of the conductive wiring, and one side of the limiting sleeve is fixedly connected to the partition.

[0013] Further preferably, one side of the guide rail is provided with equidistantly distributed insertion holes, one side of the sliding sleeve is penetrated by a plug, and one side of the plug is sleeved with an insulating sleeve.

[0014] Further preferably, a straightening bar is symmetrically fixedly connected inside the conductive cylinder, and the straightening bar is slidably connected to the support column.

[0015] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0016] 1. The utility model rotates the fixing ring to move the fixing ring threadedly connected to the support column. The fixing ring drives the conductive cylinder to move up and down through the annular slider and the annular slide rail, so that the height of the conductive cylinder can be adjusted according to the installation requirements of the transformer cabinet, so that the lightning protection range of the conductive cylinder can be adjusted according to the requirements;

[0017] Second, the utility model provides a conductive block in cooperation with the conductive wiring to conduct away the excess current, and provides a partition in cooperation with the limiting sleeve to limit the conductive wiring to prevent the conductive wiring from contacting the cabinet.

[0018] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 This is the installation structure diagram of the guide rail in the utility model;

[0022] Figure 3 This is a connection structure diagram of the conductive tube in the utility model;

[0023] Figure 4 It is a cross-sectional structural diagram of the conductive tube in the utility model;

[0024] Figure 5 It is a rear cross-sectional structural diagram of the cabinet in the utility model.

[0025] Figure numerals: 10, transformer cabinet; 11, cabinet body; 12, cabinet door; 13, observation window; 14, warning sign; 15, heat sink; 16, radiator assembly; 20, protection mechanism; 21, conductive cylinder; 22, guide rail; 23, mounting plate; 24, conductive block; 25, conductive wiring; 26, partition; 27, limit sleeve; 28, socket; 29, support column; 31, fixing ring; 32, sliding sleeve; 33, insulating sleeve; 34, plug; 35, annular slide rail; 36, annular slider; 37, straightening bar. DETAILED DESCRIPTION

[0026] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0027] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0028] like Figure 1-5 As shown, an embodiment of the utility model provides a transformer neutral point grounding gap protection complete set of equipment, which is composed of a transformer cabinet 10 and a protection mechanism 20.

[0029] The transformer cabinet 10 includes a cabinet body 11, a cabinet door 12 and a radiator group 16. The cabinet door 12 is installed on one side of the cabinet body 11. An observation window 13 for observing the status of the internal equipment of the cabinet body 11 is installed on one side of the cabinet door 12. A warning sign 14 is fixedly connected to one side of the cabinet door 12. The warning sign 14 is used for warning to prevent accidental touch. A mounting plate 23 is symmetrically fixedly connected to the top of the cabinet body 11. The mounting plate 23 is used for installing the protection mechanism 20 and separating the protection mechanism 20 from the cabinet body 11 to prevent the current from affecting the use of the internal components of the cabinet body 11. A heat dissipation groove 15 is integrally formed on one side of the interior of the cabinet body 11. The radiator group 16 is installed inside the heat dissipation groove 15. The airflow can pass through the interior of the cabinet body 11 through the heat dissipation groove 15 to quickly bring out the heat exported by the radiator group 16, thereby improving the heat dissipation effect.

[0030] In one embodiment, in order to facilitate the conduction of current and prevent local overheating, a conductive connection 25 is passed through one side of the interior of the mounting plate 23, one end of the conductive connection 25 is fixedly connected to the conductive block 24, and a partition 26 is symmetrically fixedly connected to one side of the cabinet 11. The conductive connection 25 is separated from the cabinet 11 by the partition 26 to prevent the use of internal components of the cabinet 11 from being affected when the current is conducted. A limiting sleeve 27 is provided on one side of the conductive connection 25, and one side of the limiting sleeve 27 is fixedly connected to the partition 26. The limiting sleeve 27 limits the conductive connection 25 to prevent the conductive connection 25 from shifting.

[0031] The protection mechanism 20 includes a conductive cylinder 21, a guide rail 22 and a support column 29. A conductive block 24 is installed on one side of the mounting plate 23. The guide rail 22 is fixedly connected to one side of the conductive block 24. A sliding sleeve 32 is equidistantly and slidably installed on one side of the guide rail 22. The sliding sleeve 32 cooperates with the guide rail 22 to facilitate adjustment of the intervals between multiple conductive cylinders 21. The conductive cylinder 21 is installed through the sliding sleeve 32, which is convenient for removing the conductive cylinder 21 for maintenance or replacement when necessary. The support column 29 is fixedly connected to one side of the sliding sleeve 32. The conductive cylinder 21 is sleeved on one side of the support column 29. A fixing ring 31 is threadedly connected to one side of the support column 29. An annular slide rail 35 is installed on one side of the conductive cylinder 21. An annular slider 36 is slidably connected inside the annular slide rail 35. One side of the annular slider 36 is fixedly connected to the fixing ring 31. The fixing ring 31 is connected to the conductive cylinder 21 through the annular slider 36 cooperating with the annular slide rail 35, so that the conductive cylinder 21 can be driven to adjust its height when the fixing ring 31 rotates.

[0032] In one embodiment, in order to facilitate fixing the position of the sliding sleeve 32, one side of the guide rail 22 is provided with equidistantly distributed holes 28, one side of the sliding sleeve 32 is penetrated by a plug 34, one side of the plug 34 is covered with an insulating sleeve 33, the sliding sleeve 32 is quickly fixed to one side of the guide rail 22 by inserting the plug 34 into the hole 28, and the insulating sleeve 33 is covered on the surface of the plug 34 to prevent the plug 34 from loosening and to provide insulation protection for the plug 34.

[0033] In one embodiment, in order to enhance the stability of the conductive tube 21 when it is lifted or lowered, a straightening bar 37 is symmetrically fixedly connected inside the conductive tube 21 , and the straightening bar 37 is slidably connected to the support column 29 .

[0034] When the utility model is in operation: the cabinet 11 is installed at a specified position, the conductive wiring 25 is connected to the grounding wire, the conductive wiring 25 is located in the limiting sleeve 27 when installed, the limiting sleeve 27 cooperates with the partition 26 to prevent the conductive wiring 25 from deviating and prevent the conductive wiring 25 from contacting the cabinet 11, the sliding sleeve 32 is sleeved on one side of the guide rail 22, the interval between the conductive cylinders 21 is adjusted according to needs, and the plug 34 is inserted into the sliding sleeve 32, so that one end of the plug 34 is inserted into the jack 28, the position of the sliding sleeve 32 is fixed, the contact surface of the plug 34 with the guide rail 22 and the sliding sleeve 32 is covered with an insulating sleeve 33, and the plug 34 is insulated and protected. When the use height of the conductive cylinder 21 needs to be adjusted, the fixing ring 31 is rotated, and the height of the fixing ring 31 is adjusted in cooperation with the support column 29. When the fixing ring 31 is lifted or lowered, the conductive cylinder 21 is driven to lift or lower through the annular slider 36 and the annular slide rail 35. When the conductive cylinder 21 is lifted or lowered, the straightening bar 37 is always in contact with the support column 29, thereby enhancing the stability of the conductive cylinder 21.

[0035] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A transformer neutral point grounding gap protection device, characterized in that: It comprises a transformer cabinet (10) and a protection mechanism (20); The transformer cabinet (10) comprises a cabinet body (11) and a cabinet door (12), wherein the cabinet door (12) is installed on one side of the cabinet body (11), and a mounting plate (23) is symmetrically fixedly connected to the top of the cabinet body (11); The protection mechanism (20) comprises a conductive cylinder (21) and a guide rail (22); a conductive block (24) is mounted on one side of the mounting plate (23); the guide rail (22) is fixedly connected to one side of the conductive block (24); a sliding sleeve (32) is equidistantly distributed and slidably mounted on one side of the guide rail (22); a support column (29) is fixedly connected to one side of the sliding sleeve (32); the conductive cylinder (21) is sleeved on one side of the support column (29); a fixing ring (31) is threadedly connected to one side of the support column (29); an annular slide rail (35) is mounted on one side of the conductive cylinder (21); an annular slider (36) is slidably connected to the inside of the annular slide rail (35); one side of the annular slider (36) is fixedly connected to the fixing ring (31).

2. A transformer neutral point grounding gap protection complete set according to claim 1, characterized in that: An observation window (13) is installed on one side of the cabinet door (12), and a warning sign (14) is fixedly connected to one side of the cabinet door (12).

3. A transformer neutral point grounding gap protection complete set according to claim 1, characterized in that: A heat dissipation groove (15) is integrally formed on one side of the cabinet (11), and a radiator group (16) is installed on one side inside the heat dissipation groove (15).

4. A transformer neutral point grounding gap protection complete set according to claim 1, characterized in that: A conductive connection (25) passes through one side of the interior of the mounting plate (23), and one end of the conductive connection (25) is fixedly connected to the conductive block (24).

5. A transformer neutral point grounding gap protection complete set according to claim 4, characterized in that: A partition plate (26) is symmetrically fixedly connected to one side of the cabinet (11), a limiting sleeve (27) is sleeved on one side of the conductive wiring (25), and one side of the limiting sleeve (27) is fixedly connected to the partition plate (26).

6. A transformer neutral point grounding gap protection complete set according to claim 1, characterized in that: One side of the guide rail (22) is provided with insertion holes (28) at equal intervals, one side of the sliding sleeve (32) is penetrated by a plug (34), and one side of the plug (34) is sleeved with an insulating sleeve (33).

7. A transformer neutral point grounding gap protection complete set according to claim 1, characterized in that: A straightening bar (37) is symmetrically and fixedly connected inside the conductive cylinder (21), and the straightening bar (37) is slidably connected to the support column (29).

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