Protective device for voltage transformer

Abstract

The utility model discloses a protective device for a voltage transformer, which belongs to the technical field of transformer protection and comprises a transformer body, the bottom end of the transformer body is fixedly connected with a lower shell, the top end of the lower shell is provided with an upper shell, and the top end of the upper shell is provided with a protective structure for protecting a wiring terminal. The bottom end of the upper shell is fixedly connected with a fixing plate, a fixing groove is formed in the position, corresponding to the surface of the lower shell, of the surface of the fixing plate, the surface of the fixing plate is slidably connected with an inner cavity of the fixing groove in an inserted mode, the fixing plate is arranged in a square shape, and the two sides of the lower shell are each provided with a positioning structure used for fixing the upper shell. Through cooperation of the upper shell and the lower shell, the whole voltage transformer is protected, and through cooperation of the protection structure, the wiring terminal is protected, so that the protection range of the voltage transformer is expanded, and the protection effect of the voltage transformer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer protection, in particular to a protection device for a voltage transformer. Background Art

[0002] Voltage transformers are similar to transformers and are instruments used to transform voltage. However, the purpose of transformers to transform voltage is to facilitate the transmission of electrical energy, so the capacity is large and is generally calculated in kilovolt-amperes or megavolt-amperes; while the purpose of voltage transformers to transform voltage is mainly to power measuring instruments and relay protection devices, and to measure the voltage, power and electrical energy of the line.

[0003] The existing voltage transformer is directly exposed to the external environment. In order to protect it, it is usually wrapped with rubber bands or covered with sealed covers. However, most of them only protect the porcelain bottle and primary terminal at the upper end, and the protection range is small, resulting in a decrease in the protection effect of the transformer.

[0004] According to the publication number: CN209625978U, a protective device for a voltage transformer is provided, including a protective cover, a protective body and a protective cloth cover, the inner surfaces of the protective cover and the protective body are paved with an elastic protective layer, the protective cloth cover is fixedly connected to the protective cover, and the protective cloth cover covers the protective cover and the protective body; the top of the protective cover is provided with a cylindrical cavity protruding outward, a clamping ring is provided in the cylindrical cavity, and the outer wall of the clamping ring is fixedly connected to the elastic protective layer on the inner surface of the protective cover; the protective body is provided with a cutout along the length direction, and the cutout is connected by a first Velcro. The utility model is simple to operate, easy to install and disassemble, and has a good protective effect, and effectively solves the problem of damage to the porcelain bottle and moisture or oil on the surface of the primary terminal of the voltage transformer during transportation.

[0005] According to the protection device introduced above, only the porcelain bottle and the primary terminal at the upper end of the transformer are protected, and the protection range is small, resulting in a decrease in the protection effect of the transformer. Therefore, we need to propose a protection device for a voltage transformer. Utility Model Content

[0006] The purpose of the utility model is to provide a protective device for a voltage transformer, which protects the entire voltage transformer through the cooperation of an upper shell and a lower shell, and protects the wiring terminals through the cooperation of a protective structure, thereby expanding the protection range of the voltage transformer and improving the protection effect of the transformer, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protective device for a voltage transformer, comprising a transformer body, the bottom end of the transformer body is fixedly connected with a lower shell, the top of the lower shell is provided with an upper shell, the top of the upper shell is provided with a protective structure for protecting the wiring terminals, the bottom end of the upper shell is fixedly connected with a fixing plate, a fixing groove is provided at a position corresponding to the surface of the fixing plate and the surface of the lower shell, the surface of the fixing plate is plugged and slidably connected with the inner cavity of the fixing groove, the fixing plate is shaped like a U-shaped, and positioning structures for fixing the upper shell are provided on both sides of the lower shell.

[0008] Preferably, the protective structure includes a left tube and a right tube, the bottom ends of the left tube and the right tube are fixedly connected with sliders, the surface of the slider is provided with a sliding groove at a position corresponding to the surface of the upper shell, the surface of the slider is slidably connected to the inner cavity of the sliding groove, positioning holes are provided on both sides of the left tube surface, the surface of the positioning hole is provided with a threaded hole at a position corresponding to the surface of the right tube, the inner cavity of the positioning hole is movably inserted with a bolt, the outer surface of the bolt is threadedly connected to the inner cavity of the threaded hole, and the inner cavities of the left tube and the right tube are bonded with sealing gaskets.

[0009] Preferably, a sealing strip is bonded to the surface of the left tube, a sealing groove is provided at a position on the surface of the sealing strip corresponding to the surface of the right tube, and the surface of the sealing strip is engaged with the inner cavity of the sealing groove.

[0010] Preferably, the positioning structure includes a support plate, one end of which is fixedly connected to the surface of the lower shell, a threaded sleeve is inserted and fixed on the surface of the support plate, an inner cavity of the threaded sleeve is threadedly connected to a screw, one end of the screw is fixedly connected to a knob, and the other end of the screw is rotatably connected to a block via a rotating shaft.

[0011] Preferably, the support plates and the clamping blocks are both L-shaped, and two groups of support plates are provided, and the two groups of support plates are symmetrically distributed at both ends of the lower shell.

[0012] Preferably, a movable rod is fixedly connected to the surface of the blocking block, a through hole is opened at a position corresponding to the surface of the movable rod and the surface of the supporting plate, the surface of the movable rod is plugged and movable with the inner cavity of the through hole of the supporting plate, and the other end of the movable rod is fixedly connected to a fixed block.

[0013] Preferably, a sealing gasket is bonded to the lower surface of the lower shell, the surface of the sealing gasket is in contact with the surface of the fixing plate, and two groups of the sealing gaskets are provided.

[0014] Preferably, an anti-skid pad is bonded to the outer surface of the knob, and anti-skid particles are arranged on the surface of the anti-skid pad.

[0015] Preferably, the slider is in a T-shape and is provided in two groups.

[0016] Preferably, two groups of movable rods are provided, and the two groups of movable rods are symmetrically distributed at two ends of the clamping block.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model provides a protective device for a voltage transformer, which protects the entire voltage transformer through the cooperation of an upper shell and a lower shell, and protects the wiring terminals through the cooperation of a protective structure, thereby expanding the protection range of the voltage transformer and improving the protection effect of the transformer. Through the cooperation of a fixing plate and a fixing groove, the upper shell and the lower shell can be initially fixed by plugging, and through the cooperation of a positioning structure, the position of the lower shell after being connected to the upper shell can be positioned and released, so that the upper shell and the lower shell can be quickly installed and disassembled, thereby providing convenience for the maintenance work of the protective device.

[0019] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the decomposed structure of the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the utility model from a top view;

[0023] Figure 4 It is a structural schematic diagram of the protective structure of the utility model.

[0024] In the figure: 1. transformer body; 2. lower shell; 3. upper shell; 4. protective structure; 41. left tube; 42. right tube; 43. slider; 44. slide groove; 45. positioning hole; 46. threaded hole; 47. bolt; 5. fixing plate; 6. fixing groove; 7. positioning structure; 71. support plate; 72. threaded sleeve; 73. screw; 74. knob; 75. block; 8. sealing strip; 9. sealing groove; 10. movable rod; 11. fixing block; 12. sealing pad; 13. anti-slip pad. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-4 The utility model provides a technical solution: a protective device for a voltage transformer, comprising a transformer body 1, a lower shell 2 is fixedly connected to the bottom end of the transformer body 1, an upper shell 3 is arranged at the top end of the lower shell 2, a protective structure 4 for protecting the wiring terminals is arranged at the top end of the upper shell 3, a fixing plate 5 is fixedly connected to the bottom end of the upper shell 3, a fixing groove 6 is provided at a position corresponding to the surface of the fixing plate 5 and the surface of the fixing plate 5 is plugged and slid with the inner cavity of the fixing groove 6, the fixing plate 5 is in a mouth-shaped shape, and positioning structures 7 for fixing the upper shell 3 are arranged on both sides of the lower shell 2;

[0027] During installation, take the upper shell 3 and the lower shell 2 for assembling, so that the upper shell 3 and the lower shell 2 cooperate to wrap the transformer as a whole, the upper shell 3 drives the fixing plate 5 to be inserted into the inner cavity of the fixing groove 6, so that the upper shell 3 and the lower shell 2 are initially fixed, and then the positioning structure 7 is rotated to position the position after the connection between the upper shell 3 and the lower shell 2, and finally the cable is taken from the wiring port of the upper shell 3 and the wiring terminal of the transformer body 1, and the protective structure 4 is combined to protect the wiring terminal of the transformer body 1, thereby expanding the protection range of the voltage transformer and improving the protection effect of the transformer.

[0028] The protective structure 4 includes a left tube 41 and a right tube 42. The bottom ends of the left tube 41 and the right tube 42 are fixedly connected with a slider 43. A slide groove 44 is provided at a position corresponding to the surface of the upper shell 3 on the surface of the slider 43. The surface of the slider 43 is slidably connected to the inner cavity of the slide groove 44. Positioning holes 45 are provided on both sides of the surface of the left tube 41. A threaded hole 46 is provided at a position corresponding to the surface of the right tube 42 on the surface of the positioning hole 45. A bolt 47 is movably inserted into the inner cavity of the positioning hole 45. The outer surface of the bolt 47 is connected to the threaded hole 46. The inner cavity is threadedly connected, and the inner cavities of the left tube 41 and the right tube 42 are both bonded with sealing gaskets 12. Through the cooperation of the slider 43 and the slide groove 44, the left tube 41 and the right tube 42 can slide on the top of the upper shell 3. After the left tube 41 and the right tube 42 are combined, the sealing gasket 12 is driven to fit the connection between the cable and the terminal. Then, the bolt 47 is inserted into the positioning hole 45 and the bolt 47 is rotated to connect with the threaded hole 46, so that the left tube 41 and the right tube 42 are combined into a protective cover to protect the connection between the terminal and the cable.

[0029] A sealing strip 8 is bonded to the surface of the left tube 41, and a sealing groove 9 is opened at a position on the surface of the sealing strip 8 corresponding to the surface of the right tube 42. The surface of the sealing strip 8 is engaged with the inner cavity of the sealing groove 9. Through the cooperation between the sealing strip 8 and the sealing groove 9, the sealing performance of the combined left tube 41 and the right tube 42 is increased, which prevents rainwater from entering the interior of the left tube 41 and the right tube 42 through the gap at the connection, thereby increasing the protection effect on the wiring terminals.

[0030] The positioning structure 7 includes a support plate 71, one end of which is fixedly connected to the surface of the lower shell 2, a threaded sleeve 72 is inserted and fixed on the surface of the support plate 71, the inner cavity of the threaded sleeve 72 is threadedly connected to a screw rod 73, one end of the screw rod 73 is fixedly connected to a knob 74, and the other end of the screw rod 73 is rotatably connected to a block 75 via a rotating shaft. The screw rod 73 is rotated by rotating the knob 74. The screw rod 73 is rotated by rotating the knob 74. The screw rod 73 is threadedly connected to the threaded sleeve 72 so that the screw rod 73 can move up and down on the surface of the threaded sleeve 72 when it rotates, so that the screw rod 73 pushes the block 75 to contact the surface of the lower shell 2, thereby positioning and releasing the position after the lower shell 2 and the upper shell 3 are connected.

[0031] The shapes of the support plate 71 and the block 75 are both L-shaped. There are two groups of support plates 71, and the two groups of support plates 71 are symmetrically distributed at both ends of the lower shell 2. Through the shape setting of the support plate 71, the support plate 71 can provide supporting force for the block 75, and cooperate with the block 75 to position the position after the lower shell 2 and the upper shell 3 are connected. Through the shape setting of the block 75, the block 75 can fit with the surface of the upper shell 3, thereby improving the positioning effect of the block 75 on the upper shell 3.

[0032] A movable rod 10 is fixedly connected to the surface of the clamping block 75, and a through hole is provided at a position corresponding to the surface of the movable rod 10 and the surface of the support plate 71. The surface of the movable rod 10 is plugged and movable with the inner cavity of the through hole of the support plate 71, and the other end of the movable rod 10 is fixedly connected to a fixed block 11. Through the setting of the movable rod 10, the screw rod 73 is prevented from driving the clamping block 75 to rotate, and the angle of the clamping block 75 is prevented from shifting when the clamping block 75 moves, thereby improving the stability of the clamping block 75 when moving.

[0033] A sealing gasket 12 is bonded to the lower surface of the lower shell 2, and the surface of the sealing gasket 12 is in contact with the surface of the fixing plate 5. Two groups of sealing gaskets 12 are provided. Through the provision of the sealing gaskets 12, the sealing performance of the lower shell 2 and the upper shell 3 after being combined is improved, thereby preventing rainwater or dust from entering the interior through the connection between the upper shell 3 and the lower shell 2 and affecting the transformer body 1.

[0034] An anti-skid pad 13 is bonded to the outer surface of the knob 74, and anti-skid particles are arranged on the surface of the anti-skid pad 13. The setting of the anti-skid pad 13 increases the friction between the staff's hand and the knob 74, and the setting of the anti-skid particles increases the friction effect of the anti-skid pad 13, which provides convenience for the staff to rotate the knob 74.

[0035] The shape of the slider 43 is T-shaped. There are two groups of sliders 43. The shape of the slider 43 improves the stability of the slider 43 when it moves in the inner cavity of the slide groove 44, thereby preventing the slider 43 from slipping out of the inner cavity of the slide groove 44 when moving.

[0036] There are two groups of movable rods 10, which are symmetrically distributed at both ends of the block 75. The arrangement of the movable rods 10 improves the stability of the block 75 during movement, and at the same time, the auxiliary block 75 supports the upper shell 3.

[0037] When in use, take the upper shell 3 and the lower shell 2 for assembly, so that the upper shell 3 and the lower shell 2 cooperate to wrap the transformer as a whole, the upper shell 3 drives the fixing plate 5 to be inserted into the inner cavity of the fixing groove 6, so that the upper shell 3 and the lower shell 2 are initially fixed, and the rotating knob 74 drives the screw 73 to rotate. The screw 73 is connected with the threaded sleeve 72 through a thread, so that the screw 73 can move up and down on the surface of the threaded sleeve 72 when it rotates, so that the screw 73 pushes the block 75 to contact the surface of the lower shell 2, and the position after the lower shell 2 and the upper shell 3 are connected is positioned, and then the cable is taken out from the wiring port of the upper shell 3 to connect with the wiring terminal of the transformer body 1, and the left tube 41 and the right tube 42 are connected to the slide groove through the slider 43 44, slide on the top of the upper shell 3 for combination, the left tube 41 drives the sealing strip 8 to be inserted into the sealing groove 9 of the right tube 42, and then the bolt 47 is inserted into the positioning hole 45 and the rotating bolt 47 is connected with the threaded hole 46, so that the left tube 41 and the right tube 42 are combined into a protective sleeve to protect the connection between the terminal and the cable. When disassembling, the rotating bolt 47 is moved out of the inner cavity of the positioning hole 45, the combination between the left tube 41 and the right tube 42 is cancelled, the cable and the terminal are disassembled, and then the knob 74 is rotated to drive the block 75 away from the upper shell 3 to release it, so that the upper shell 3 and the lower shell 2 are disassembled, thereby expanding the protection range of the voltage transformer and improving the protection effect of the transformer.

[0038] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A protection device for a voltage transformer, characterized in that: include: A transformer body (1), wherein the bottom end of the transformer body (1) is fixedly connected to a lower shell (2), and the top end of the lower shell (2) is provided with an upper shell (3); A protective structure (4) disposed on the top of the upper shell (3) and used to protect the wiring terminals; A fixing plate (5) is fixedly connected to the bottom end of the upper shell (3), a fixing groove (6) is provided on the surface of the fixing plate (5) at a position corresponding to the surface of the lower shell (2), the surface of the fixing plate (5) and the inner cavity of the fixing groove (6) are plugged and slidably connected, and the fixing plate (5) is shaped like a square; and Positioning structures (7) for fixing the upper shell (3) are arranged on both sides of the lower shell (2).

2. A voltage transformer protection device according to claim 1, characterized in that: The protective structure (4) comprises a left tube (41) and a right tube (42), the bottom ends of the left tube (41) and the right tube (42) are fixedly connected with a slider (43), the surface of the slider (43) is provided with a slide groove (44) at a position corresponding to the surface of the upper shell (3), the surface of the slider (43) is slidably connected with the inner cavity of the slide groove (44), positioning holes (45) are provided on both sides of the surface of the left tube (41), the surface of the positioning hole (45) is provided with a threaded hole (46) at a position corresponding to the surface of the right tube (42), the inner cavity of the positioning hole (45) is movably inserted with a bolt (47), the outer surface of the bolt (47) is threadedly connected with the inner cavity of the threaded hole (46), and the inner cavities of the left tube (41) and the right tube (42) are both bonded with sealing gaskets (12).

3. A voltage transformer protection device according to claim 2, characterized in that: A sealing strip (8) is bonded to the surface of the left tube (41), a sealing groove (9) is provided at a position on the surface of the sealing strip (8) corresponding to the surface of the right tube (42), and the surface of the sealing strip (8) is engaged with the inner cavity of the sealing groove (9).

4. A voltage transformer protection device according to claim 1, characterized in that: The positioning structure (7) comprises a support plate (71), one end of the support plate (71) is fixedly connected to the surface of the lower shell (2), a threaded sleeve (72) is inserted and fixed to the surface of the support plate (71), the inner cavity of the threaded sleeve (72) is connected to a screw rod (73) via a thread, one end of the screw rod (73) is fixedly connected to a knob (74), and the other end of the screw rod (73) is rotatably connected to a clamping block (75) via a rotating shaft.

5. A voltage transformer protection device according to claim 4, characterized in that: The support plates (71) and the clamping blocks (75) are both L-shaped. Two groups of support plates (71) are provided. The two groups of support plates (71) are symmetrically distributed at both ends of the lower shell (2).

6. A voltage transformer protection device according to claim 4, characterized in that: A movable rod (10) is fixedly connected to the surface of the clamping block (75); a through hole is provided on the surface of the movable rod (10) at a position corresponding to the surface of the support plate (71); the surface of the movable rod (10) is plugged and movable with the inner cavity of the through hole of the support plate (71); and the other end of the movable rod (10) is fixedly connected to a fixed block (11).

7. A voltage transformer protection device according to claim 1, characterized in that: A sealing gasket (12) is bonded to the lower surface of the lower shell (2), the surface of the sealing gasket (12) is in contact with the surface of the fixing plate (5), and two groups of the sealing gaskets (12) are provided.

8. A voltage transformer protection device according to claim 4, characterized in that: An anti-skid pad (13) is bonded to the outer surface of the knob (74), and anti-skid particles are arranged on the surface of the anti-skid pad (13).

9. A voltage transformer protection device according to claim 2, characterized in that: The shape of the slider (43) is T-shaped and two groups of the slider (43) are provided.

10. A voltage transformer protection device according to claim 6, characterized in that: Two groups of movable rods (10) are provided, and the two groups of movable rods (10) are symmetrically distributed at two ends of the clamping block (75).

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