Safe transformer neutral point grounding protection device

Abstract

The utility model provides a safe transformer neutral point grounding protection device. The safe transformer neutral point grounding protection device comprises a main body mechanism and a supporting mechanism, the main body mechanism comprises a mounting plate, a lightning arrester and a neutral point isolation switch, the lightning arrester and the neutral point isolation switch are both mounted on one side of the mounting plate, a second sliding rail is mounted on one side of the mounting plate, and a second sliding block is slidably connected into the second sliding rail; the supporting mechanism comprises a base, a supporting rod is mounted on one side of the base, and one end of the supporting rod is fixedly connected with the mounting plate; a second screw rod is rotated to be matched with a threaded sleeve to drive a second sliding block and a current transformer to move, the distance between the current transformer and a lightning arrester can be conveniently adjusted according to requirements, a first screw rod is rotated to drive a connecting plate to move after adjustment, a rubber pad on one side of the connecting plate is attached to a gear, and the current transformer is fixed. And the gear and the second screw rod are extruded and fixed, so that the position deviation of the current transformer caused by the deflection of the second screw rod is prevented.

Description

Technical Field

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

[0002] Transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. Its main components are primary coil, secondary coil and iron core (magnetic core). Its main functions include voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc. Transformers can be divided into distribution transformers, power transformers, fully sealed transformers, combined transformers, dry transformers, oil-immersed transformers, single-phase transformers, electric furnace transformers, rectifier transformers, reactors, anti-interference transformers, lightning protection transformers, box-type transformer test transformers, corner transformers, high current transformers, excitation transformers, etc. Neutral point grounding protection device is a protection device. Transformer neutral point grounding protection device is dedicated to the neutral point of power transformers to realize two different operating modes of transformer neutral point grounding or ungrounded operation; thereby avoiding damage to the transformer caused by the increase of transformer neutral point voltage due to system failure. This product is widely used in power, metallurgy, petrochemical, construction, environmental protection and other fields;

[0003] A Chinese patent publication (CN202220815192.1) discloses a novel transformer neutral point gap grounding protection device, which uses a slide rail to adjust the distance between the discharge gap devices, so that the discharge gap devices can be easily adjusted according to different situations and needs. However, when used, the application only relies on the slide rail to adjust the distance between the discharge gap devices. After the adjustment, there is a lack of a fixed structure for the discharge gap device, which makes the discharge gap device prone to sliding displacement, affecting the protection effect;

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

[0005] In view of this, the utility model provides a safe transformer neutral point grounding 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 safe transformer neutral point grounding protection device, comprising a main body mechanism and a supporting mechanism;

[0007] The main mechanism comprises a mounting plate, a lightning arrester and a neutral point isolating switch, the lightning arrester and the neutral point isolating switch are both mounted on one side of the mounting plate, a second slide rail is mounted on one side of the mounting plate, a second slider is slidably connected inside the second slide rail, a current transformer is mounted on one side of the second slider, a second screw rod is rotatably connected to one side of the mounting plate, a threaded sleeve is sleeved on one side of the second screw rod, one side of the threaded sleeve is fixedly connected to the second slider, one end of the second screw rod is fixedly connected to a turntable, one side of the second screw rod is fixedly connected to a gear, a connecting plate is provided on one side of the mounting plate, a first screw rod is rotatably connected to one side of the mounting plate, one side of the first screw rod passes through the connecting plate, the first screw rod passes through one side of the connecting plate and is threadedly connected to the connecting plate, a rubber pad is fixedly connected to one side of the connecting plate, a sliding rod is fixedly connected to one side of the connecting plate, and one side of the sliding rod is slidably connected to the mounting plate;

[0008] The supporting mechanism comprises a base, a supporting rod is installed on one side of the base, and one end of the supporting rod is fixedly connected to the mounting plate.

[0009] Further preferably, an operation box is installed on one side of the support rod.

[0010] Further preferably, a ladder is fixedly connected to one side of the support rod at equal intervals.

[0011] Further preferably, a first slide rail is symmetrically mounted on one side of the mounting plate, a first slider is slidably connected inside the first slide rail, and one side of the first slider is fixedly connected to the current transformer.

[0012] Further preferably, a protective shell is fixedly connected to one side of the mounting plate, a cover plate is hinged to one side of the protective shell, and heat dissipation holes are evenly distributed on both sides of the protective shell.

[0013] Further preferably, a rain shield is installed on the top of the protective shell.

[0014] Further preferably, both sides of the protective shell are fixedly connected with magnetic strips, and one side of the magnetic strip is provided with a dustproof net.

[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 drives the second slider and the current transformer to move by rotating the second screw rod in cooperation with the threaded sleeve, so as to facilitate the adjustment of the distance between the current transformer and the lightning arrester according to the demand, and after the adjustment, drives the connecting plate to move by rotating the first screw rod, so that the rubber pad on one side of the connecting plate fits with the gear, and the gear and the second screw rod are squeezed and fixed, so as to prevent the second screw rod from deflecting and causing the current transformer to shift in position;

[0017] 2. The utility model protects the arrester, neutral point isolating switch and current transformer by providing a protective shell in combination with a rain shield, thereby extending their service life and preventing dust and impurities from adhering to the surfaces of the arrester, neutral point isolating switch and current transformer.

[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 a bottom view of the structure of the utility model;

[0022] Figure 3 This is a structural diagram of the connection between the protective shell and the rain shield in the utility model;

[0023] Figure 4 This is a connection structure diagram of the mounting plate in the utility model;

[0024] Figure 5 This is a diagram of the installation structure of the second screw in the utility model.

[0025] Figure numerals: 10, main body; 11, mounting plate; 12, protective shell; 13, rain shield; 14, dust net; 15, heat dissipation hole; 16, magnetic strip; 17, cover plate; 18, lightning arrester; 19, neutral point disconnector; 31, current transformer; 32, first slide rail; 33, connecting plate; 34, first screw; 35, first slider; 36, rubber pad; 37, slide rod; 38, turntable; 39, gear; 41, second screw; 42, threaded sleeve; 43, second slide rail; 44, second slider; 20, support mechanism; 21, base; 22, support rod; 23, ladder; 24, operation box. 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, the embodiment of the utility model provides a safe transformer neutral point grounding protection device, which is composed of a main body mechanism 10 and a support mechanism 20.

[0029] The main mechanism 10 includes a mounting plate 11, a lightning arrester 18 and a neutral point isolating switch 19. The lightning arrester 18 and the neutral point isolating switch 19 are both mounted on one side of the mounting plate 11. A second slide rail 43 is mounted on one side of the mounting plate 11. A second slider 44 is slidably connected to the inside of the second slide rail 43. A current transformer 31 is mounted on one side of the second slider 44. The current transformer 31 is installed by cooperating with the second slider 44 with the second slide rail 43, so that the position of the current transformer 31 is adjustable, which is convenient for adjusting the interval between the current transformer 31 and the lightning arrester 18 according to needs. A second screw 41 is rotatably connected to one side of the mounting plate 11. A threaded sleeve 42 is sleeved on one side of the second screw 41. One side of the threaded sleeve 42 is fixedly connected to the second slider 44. The second screw 41 cooperates with the threaded sleeve 42 to facilitate the movement of the second slider 44, which is convenient for adjusting the position of the current transformer 31. The position can be quickly adjusted, one end of the second screw rod 41 is fixedly connected to the turntable 38, one side of the second screw rod 41 is fixedly connected to the gear 39, one side of the mounting plate 11 is provided with a connecting plate 33, one side of the mounting plate 11 is rotatably connected to the first screw rod 34, one side of the first screw rod 34 passes through the connecting plate 33, the first screw rod 34 passes through one side of the connecting plate 33 and is threadedly connected to the connecting plate 33, one side of the connecting plate 33 is fixedly connected to a rubber pad 36, the connecting plate 33 is driven to move by the first screw rod 34, so that the connecting plate 33 can drive the rubber pad 36 to contact the gear 39, and the gear 39 and the second screw rod 41 are fixed by the rubber pad 36 and the gear 39 to prevent the current transformer 31 from sliding, one side of the connecting plate 33 is fixedly connected to a sliding rod 37, one side of the sliding rod 37 is slidably connected to the mounting plate 11, and the sliding rod 37 is provided to enhance the stability of the connecting plate 33 during movement.

[0030] In one embodiment, in order to enhance the stability of the current transformer 31 , a first slide rail 32 is symmetrically installed on one side of the mounting plate 11 , a first slider 35 is slidably connected inside the first slide rail 32 , and one side of the first slider 35 is fixedly connected to the current transformer 31 .

[0031] In one embodiment, in order to extend the service life of the lightning arrester 18, the current transformer 31 and the neutral point disconnector 19, a protective shell 12 is fixedly connected to one side of the mounting plate 11, a rain shield 13 is installed on the top of the protective shell 12, and a cover plate 17 is hinged on one side of the protective shell 12. During maintenance, the cover plate 17 is opened to facilitate the position adjustment of the current transformer 31. Heat dissipation holes 15 are evenly distributed on both sides of the protective shell 12. The protective shell 12 cooperates with the rain shield 13 to shield and protect the lightning arrester 18, the current transformer 31 and the neutral point disconnector 19, and the heat dissipation holes 15 are provided to facilitate the discharge of heat generated by the lightning arrester 18, the current transformer 31 and the neutral point disconnector 19 during use.

[0032] In one embodiment, in order to prevent dust and impurities from entering the protective shell 12 through the heat dissipation holes 15, magnetic strips 16 are fixedly connected to both sides of the protective shell 12, and a dustproof net 14 is provided on one side of the magnetic strip 16. The dustproof net 14 intercepts dust and impurities to prevent dust from adhering to the surface of the lightning arrester 18, the current transformer 31 and the neutral point isolating switch 19 and affecting normal use.

[0033] The support mechanism 20 includes a base 21, a support rod 22 and an operating box 24. The support rod 22 is installed on one side of the base 21. The base 21 cooperates with the support rod 22 to support the main mechanism 10. One end of the support rod 22 is fixedly connected to the mounting plate 11. The operating box 24 is installed on one side of the support rod 22. The neutral point disconnector 19 or the transformer is manually operated through the operating box 24.

[0034] In one embodiment, in order to facilitate workers to climb and perform maintenance, ladders 23 are evenly distributed and fixedly connected to one side of the support rod 22 .

[0035] When the utility model is in operation: the position of the base 21 is fixed, and the position of the current transformer 31 is adjusted after the wiring is completed, and the interval between the current transformer 31 and the lightning arrester 18 is adjusted according to the demand, the cover 17 is opened, and the first screw 34 is rotated, so that the connecting plate 33 drives the rubber pad 36 to move upward, and the turntable 38 is rotated, and the threaded sleeve 42 is driven to move by the second screw 41, so that the threaded sleeve 42 drives the second slider 44 to move, and the position of the current transformer 31 is adjusted. After the adjustment, the first screw 34 is rotated in the opposite direction, so that the connecting plate 33 drives the rubber pad 36 to move downward, so that the rubber pad 36 is fitted with the gear 39, and the gear 39 is fixed, so that the second screw 41 cannot continue to rotate, and the position of the current transformer 31 is fixed to prevent the current transformer 31 from sliding and affecting normal use.

[0036] 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 safe transformer neutral point grounding protection device, characterized in that: It comprises a main body mechanism (10) and a supporting mechanism (20); The main body mechanism (10) comprises a mounting plate (11), a lightning arrester (18) and a neutral point isolating switch (19); the lightning arrester (18) and the neutral point isolating switch (19) are both mounted on one side of the mounting plate (11); a second slide rail (43) is mounted on one side of the mounting plate (11); a second slider (44) is slidably connected to the interior of the second slide rail (43); a current transformer (31) is mounted on one side of the second slider (44); a second screw rod (41) is rotatably connected to one side of the mounting plate (11); a threaded sleeve (42) is sleeved on one side of the second screw rod (41); and one side of the threaded sleeve (42) is fixedly connected to the second slider (44). , one end of the second screw rod (41) is fixedly connected to a rotating disk (38), one side of the second screw rod (41) is fixedly connected to a gear (39), one side of the mounting plate (11) is provided with a connecting plate (33), one side of the mounting plate (11) is rotatably connected to a first screw rod (34), one side of the first screw rod (34) passes through the connecting plate (33), one side of the first screw rod (34) passes through the connecting plate (33) and is threadedly connected to the connecting plate (33), one side of the connecting plate (33) is fixedly connected to a rubber pad (36), one side of the connecting plate (33) is fixedly connected to a sliding rod (37), and one side of the sliding rod (37) is slidably connected to the mounting plate (11); The support mechanism (20) comprises a base (21), a support rod (22) is mounted on one side of the base (21), and one end of the support rod (22) is fixedly connected to the mounting plate (11).

2. A safe transformer neutral point grounding protection device according to claim 1, characterized in that: An operation box (24) is installed on one side of the support rod (22).

3. A safe transformer neutral point grounding protection device according to claim 1, characterized in that: One side of the support rod (22) is fixedly connected with a ladder (23) at equal intervals.

4. A safe transformer neutral point grounding protection device according to claim 1, characterized in that: A first slide rail (32) is symmetrically mounted on one side of the mounting plate (11), a first slider (35) is slidably connected inside the first slide rail (32), and one side of the first slider (35) is fixedly connected to the current transformer (31).

5. A safe transformer neutral point grounding protection device according to claim 1, characterized in that: A protective shell (12) is fixedly connected to one side of the mounting plate (11), a cover plate (17) is hingedly connected to one side of the protective shell (12), and heat dissipation holes (15) are evenly distributed on both sides of the protective shell (12).

6. A safe transformer neutral point grounding protection device according to claim 5, characterized in that: A rain shield (13) is installed on the top of the protective shell (12).

7. A safe transformer neutral point grounding protection device according to claim 5, characterized in that: Both sides of the protective shell (12) are fixedly connected with magnetic strips (16), and one side of the magnetic strip (16) is provided with a dustproof net (14).

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