Transformer bushing with auxiliary supporting device

Abstract

The utility model discloses a transformer bushing with an auxiliary supporting device, which belongs to the technical field of transformers, and comprises an inclined bushing, a supporting mechanism is abutted against the bushing, the supporting mechanism comprises a supporting frame and a fixing ring, the upper end of the supporting frame is connected with the fixing ring, two wire clamping plates are mounted on the inner wall of the fixing ring, and the two wire clamping plates are connected with the supporting frame. One end of each wire clamping plate is rotationally installed on the fixing ring, the other ends of the wire clamping plates can make contact with each other, sliding blocks are installed on the wire clamping plates, two control strips are installed on the inner wall of the fixing ring, one sides of the control strips are in sliding fit with the fixing ring, the other sides of the control strips are hinged to the two sliding blocks, and the control strips are connected with the sliding blocks. A transition ring is installed between the fixing ring and the supporting frame, a non-return assembly is arranged on the transition ring, the lower end of the control strip can be matched with the non-return assembly, the problem of bearing fracture at the connecting position of the wiring terminal and an external wire can be solved, and the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a transformer bushing with an auxiliary supporting device. Background Art

[0002] The transformer bushing is an important insulating device installed outside the transformer box. The lead wires of the transformer winding must pass through the insulating bushing to insulate the lead wires and the lead wires from the transformer casing. At the same time, the transformer bushing also plays the role of fixing the lead wires. With the development of my country's power industry, the power supply has increased year by year, and power transformers have gradually developed towards high voltage and large capacity. Therefore, there are stricter requirements on the service life and maintenance cost of transformer bushings;

[0003] When connecting external wires to the terminals on the existing transformer bushing, the weight of the wires themselves is borne entirely by the connection between the wires and the transformer bushing. Due to the lack of effective fixing measures between the external wires and the terminals on the bushing, long-term load-bearing will cause the connection to break. In addition, the existing transformer bushing is usually installed on the transformer at an angle. In order to facilitate maintenance, it is often fixed to the transformer with bolts. Without a corresponding support device, the bolts at the connection are subjected to radial force and a certain axial force, which is easy to loosen and cause the entire transformer bushing to shake, affecting its service life. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a transformer bushing with an auxiliary support device, which can improve the problem of load-bearing fracture at the connection between the terminal and the external wire and extend the service life of the device.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a transformer bushing with an auxiliary support device, comprising a transformer, a bushing is obliquely installed on the upper end of the transformer, a support mechanism is installed on the transformer, and the support mechanism is against the bushing;

[0006] The support mechanism comprises a support frame resting on the bushing and a fixing ring fixing the conductor, the lower end of the support frame is fixed on the transformer, and the upper end of the support frame is connected to the fixing ring;

[0007] Two clamping plates symmetrically along the axis of the fixing ring are installed on the inner wall of the fixing ring, one end of the clamping plate is rotatably installed on the fixing ring, the other end of the clamping plate can contact each other, a slider that can slide along the length direction of the clamping plate is installed on the clamping plate, and two control strips for controlling the rotation of the clamping plate are installed on the inner wall of the fixing ring, one side of the two control strips is slidably matched with the fixing ring, and the other side of the two control strips is provided with a connecting rod, and the two connecting rods are respectively hinged to the two sliders;

[0008] A transition ring is installed between the fixing ring and the support frame. The transition ring is provided with an insertion hole. The lower end of the control strip can be inserted into the insertion hole. A non-return assembly cooperating with the control strip is installed in the insertion hole.

[0009] Preferably, the fixing ring is provided with two vertical grooves, a sliding key is installed on the side of the control strip where the connecting rod is not installed, the sliding key slidably cooperates with the vertical groove, and one end of the sliding key away from the connecting rod passes through the vertical groove and extends to the outside of the fixing ring.

[0010] Preferably, a limit block is installed at the upper end of the vertical slot, the connection between the wire clamping plate and the fixing ring is located below the connecting rod, and a tension spring is connected between the limit block and the sliding key.

[0011] Preferably, the control strip is provided with a plurality of ratchets which are arranged equidistantly in the vertical direction, and the anti-return assembly comprises an anti-return pawl, and the anti-return pawl can cooperate with the ratchets to limit the upward movement of the control strip.

[0012] Preferably, a linkage rod is commonly connected between the two control strips, and a threading ring for the wire to pass through is installed on the linkage rod.

[0013] Preferably, at least two mounting rods are installed on the side wall of the fixing ring, the upper ends of the mounting rods are fixed to the fixing ring, the lower ends of the mounting rods pass through the transition ring and are inserted into the support frame, and the transition ring is fixedly connected to the mounting rods.

[0014] Preferably, the support frame includes a vertical rod and at least two support plates, the support plate is perpendicular to the inclination direction of the sleeve, one end of the support plate is provided with a U-shaped groove, the width of the U-shaped groove is slightly larger than the outer diameter of the sleeve, the sleeve is clamped on the U-shaped groove, and one end of the support plate away from the sleeve is fixed to the vertical rod.

[0015] Preferably, the support plate away from the transformer abuts against the upper end side wall of the bushing, and the mounting rod is inserted into the support plate.

[0016] Preferably, the axes of the fixing ring, the threading ring and the transition ring coincide with the axis of the sleeve.

[0017] Preferably, a terminal connected to the wire is installed at the top end of the sleeve, and the connection between the terminal and the wire is located between the transition ring and the fixing ring.

[0018] The beneficial effects of the utility model are as follows:

[0019] 1. The utility model inserts a fixing ring at the upper end of the support frame. The wire connected to the terminal passes through the fixing ring during installation and is clamped by the wire clamping plate inside the fixing ring to fix the wire and provide a certain support therefor, thereby preventing the terminal and the wire from breaking at the connection.

[0020] 2. The utility model sets two linked control strips in the fixed ring, and connects the two with the clamping plate. When the control strip slides down, it can drive the two ends of the clamping plate to move closer to each other and clamp the wire. At the same time, the ratchet part of the lower end of the control strip is inserted into the insertion hole of the transition ring, and cooperates with the non-return ratchet therein to limit the upward movement of the control strip, so that the clamping plate can keep the wire clamped to avoid loosening.

[0021] 3. The utility model installs a support frame on the transformer, and the support frame is pressed against the bushing to offset the radial force generated by the weight of the inclined bushing, thereby reducing the stress on the connection point between the transformer and the bushing, extending the service life and reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a side view of a transformer bushing with an auxiliary support device according to the utility model;

[0023] Figure 2 It is a cross-sectional view of a fixing ring of a transformer bushing with an auxiliary supporting device according to the utility model;

[0024] Figure 3 The utility model is a top view of a fixing ring of a transformer bushing with an auxiliary supporting device.

[0025] In the figure: 1-fixing ring, 2-limiting block, 3-sliding key, 4-terminal, 5-ratchet, 6-support plate, 7-vertical rod, 8-sleeve, 9-transition ring, 10-control strip, 11-mounting rod, 12-tension spring, 13-slider, 14-clamping plate, 15-connecting rod, 16-vertical groove, 17-linkage rod, 18-threading ring. DETAILED DESCRIPTION

[0026] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0027] like Figure 1-3 A transformer bushing with an auxiliary support device shown in the figure comprises a transformer, a bushing 8 is obliquely installed on the upper end of the transformer, a support mechanism is installed on the transformer, the support mechanism is against the bushing 8, the radial force generated by the bushing 8 due to its own weight is offset, the stress on the connection point between the transformer and the bushing 8 is reduced, and the service life of the connection point is extended;

[0028] The support mechanism of the utility model comprises a support frame resting on the bushing 8 and a fixing ring 1 for fixing the conductor. The lower end of the support frame is fixed on the transformer, and the upper end of the support frame is connected to the fixing ring 1.

[0029] Specifically, two clamping plates 14 are installed on the inner wall of the fixing ring 1, which are symmetrical along the axis of the fixing ring 1. One end of the clamping plates 14 is rotatably installed on the fixing ring 1, and the other ends of the clamping plates 14 can contact each other. The wire installed on the upper end of the sleeve 8 can pass through the fixing ring 1. The ends of the rotating clamping plates 14 that are close to each other can clamp the wire passing through the fixing ring 1. In addition, an insulating rubber pad can be installed on the ends of the clamping plates 14 that are in contact with each other to increase the friction with the wire and better fix the wire.

[0030] The utility model has a slider 13 installed on the clamping plate 14 that can slide along the length direction of the clamping plate 14. Two control bars 10 are installed on the inner wall of the fixing ring 1 to control the rotation of the clamping plate 14. One side of the two control bars 10 is slidably matched with the fixing ring 1, and the other side of the two control bars 10 is provided with a connecting rod 15, and the two connecting rods 15 are respectively hinged with the two sliders 13. The upward and downward sliding of the connecting rod 15 can control the rotation angle of the clamping plate 14. By adjusting the rotation angle of the two clamping plates 14, it can clamp wires of different diameters;

[0031] Specifically, two vertical grooves 16 are provided on the fixed ring 1, and a sliding key 3 is installed on the side of the control strip 10 where the connecting rod 15 is not installed. The sliding key 3 slides with the vertical groove 16, and the end of the sliding key 3 away from the connecting rod 15 can pass through the vertical groove 16 and extend to the outside of the fixed ring 1. The operator pushes the sliding key 3 from the outside of the fixed ring 1 to control the sliding of the control strip 10, thereby rotating the clamping plate 14, which is convenient for the operator to operate. The vertical groove 16 can also play a certain role in limiting the sliding of the control strip 10.

[0032] The upper end of the vertical slot 16 of the utility model is equipped with a limit block 2. The connection between the clamping plate 14 and the fixed ring 1 is located below the connecting rod 15. A tension spring 12 is connected between the limit block 2 and the sliding key 3. Before the wire is installed, the sliding key 3 connected to the tension spring 12 can always be kept in an upper position and will not fall due to its own gravity. The clamping plate 14 connected to the control strip 10 can also maintain a large opening and closing angle, and the distance between the ends of the two clamping plates 14 that are not connected to the fixed ring 1 is long, which is convenient for the installation of the wire.

[0033] The utility model has a transition ring 9 installed between the fixing ring 1 and the support frame, and at least two mounting rods 11 are installed on the side wall of the fixing ring 1. The upper end of the mounting rod 11 is fixed on the fixing ring 1, and the lower end of the mounting rod 11 passes through the transition ring 9 and is plugged into the support frame. It is convenient to position and install the fixing ring 1. The transition ring 9 is fixedly connected to the mounting rod 11, and the mounting rod 11 can simultaneously play a fixed support effect on both the transition ring 9 and the fixing ring 1.

[0034] The utility model provides an insertion hole on the transition ring 9, and the lower end of the control strip 10 can be inserted into the insertion hole. A non-return assembly cooperating with the control strip 10 is installed in the insertion hole. The control strip 10 is provided with a plurality of ratchets 5 arranged vertically equidistantly. The non-return assembly includes a non-return pawl, which can cooperate with the ratchet 5 to limit the control strip 10 from moving upward.

[0035] Specifically, a linkage rod 17 is connected between the two control strips 10, and a threading ring 18 for the wire to pass through is installed on the linkage rod 17. A terminal 4 connected to the wire is installed at the top of the sleeve 8, and the connection between the terminal 4 and the wire is located between the transition ring 9 and the fixed ring 1. Pushing any one of the sliding keys 3 or pushing the linkage rod 17 can control the two clamping plates 14 to rotate in opposite directions at the same time, which is convenient for operation. At the same time, it can also ensure that when the wire is clamped, it will not deviate too much from the axis of the control strip 10, so that it is convenient to pass through the threading ring 18.

[0036] Specifically, the axes of the fixing ring 1, the threading ring 18 and the transition ring 9 are all coincident with the axis of the sleeve 8. When the wire connected to the terminal 4 passes through the threading ring 18 and the fixing ring 1, the axes of the two coincide with the installation position of the terminal 4, and the wire does not need to be bent here. After the wire clamping plate 14 clamps the wire, it can provide a certain support for it, avoid the connection between the terminal 4 and the wire from breaking, and extend the service life of the wire and the terminal 4.

[0037] The support frame of the utility model includes a vertical rod 7 and at least two support plates 6, the support plate 6 is perpendicular to the inclination direction of the sleeve 8, one end of the support plate 6 is provided with a U-shaped groove, the width of the U-shaped groove is slightly larger than the outer diameter of the sleeve 8, the sleeve 8 is clamped on the U-shaped groove, and the U-shaped groove with one end open is convenient for the installation, disassembly and replacement of the sleeve 8.

[0038] Specifically, one end of the support plate 6 away from the bushing 8 is fixed to the vertical rod 7, the support plate 6 away from the transformer abuts against the side wall of the upper end of the bushing 8, and the mounting rod 11 is plugged into the support plate 6. The support plate 6 abuts against the bushing 8, and the radial force generated by the deadweight of the bushing 8 is transmitted to the vertical rod 7 through the support plate 6, thereby reducing the force and extending the service life.

[0039] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A transformer bushing with an auxiliary support device, characterized in that: It comprises a transformer, a bushing (8) is obliquely mounted on the upper end of the transformer, a supporting mechanism is mounted on the transformer, and the supporting mechanism rests on the bushing (8); The support mechanism comprises a support frame resting on the bushing (8) and a fixing ring (1) fixing the conductor, the lower end of the support frame being fixed on the transformer, and the upper end of the support frame being connected to the fixing ring (1); Two clamping plates (14) symmetrically arranged along the axis of the fixing ring (1) are mounted on the inner wall of the fixing ring (1); one end of the clamping plates (14) is rotatably mounted on the fixing ring (1); the other ends of the clamping plates (14) can contact each other; a slider (13) capable of sliding along the length direction of the clamping plates (14) is mounted on the clamping plates (14); two control strips (10) for controlling the rotation of the clamping plates (14) are mounted on the inner wall of the fixing ring (1); one side of the two control strips (10) is slidably matched with the fixing ring (1); the other sides of the two control strips (10) are provided with connecting rods (15); the two connecting rods (15) are respectively hinged to the two sliders (13); A transition ring (9) is installed between the fixing ring (1) and the support frame, and an insertion hole is provided on the transition ring (9). The lower end of the control strip (10) can be inserted into the insertion hole, and a non-return assembly matching the control strip (10) is installed in the insertion hole.

2. The transformer bushing with auxiliary support device according to claim 1, characterized in that: The fixing ring (1) is provided with two vertical grooves (16); a sliding key (3) is installed on the side of the control strip (10) where the connecting rod (15) is not installed; the sliding key (3) is slidably matched with the vertical groove (16); and one end of the sliding key (3) away from the connecting rod (15) passes through the vertical groove (16) and extends to the outside of the fixing ring (1).

3. The transformer bushing with auxiliary support device according to claim 2, characterized in that: A limit block (2) is installed at the upper end of the vertical groove (16); the connection between the clamping plate (14) and the fixing ring (1) is located below the connecting rod (15); and a tension spring (12) is connected between the limit block (2) and the sliding key (3).

4. The transformer bushing with auxiliary support device according to claim 1, characterized in that: The control strip (10) is provided with a plurality of ratchet teeth (5) arranged at equal intervals in the vertical direction, and the anti-return component comprises an anti-return pawl, and the anti-return pawl can cooperate with the ratchet teeth (5) to limit the upward movement of the control strip (10).

5. The transformer bushing with auxiliary support device according to claim 1, characterized in that: A linkage rod (17) is commonly connected between the two control strips (10), and a threading ring (18) for a wire to pass through is installed on the linkage rod (17).

6. The transformer bushing with auxiliary support device according to claim 1, characterized in that: At least two mounting rods (11) are mounted on the side wall of the fixing ring (1); the upper ends of the mounting rods (11) are fixed to the fixing ring (1); the lower ends of the mounting rods (11) pass through the transition ring (9) and are plugged into the support frame; the transition ring (9) is fixedly connected to the mounting rods (11).

7. The transformer bushing with auxiliary support device according to claim 6, characterized in that: The support frame comprises a vertical rod (7) and at least two support plates (6), wherein the support plates (6) are perpendicular to the inclination direction of the sleeve (8), and the mounting rod (11) is plugged into the support plates (6); A U-shaped groove is provided at one end of the support plate (6), the width of the U-shaped groove is slightly larger than the outer diameter of the sleeve (8), the sleeve (8) is clamped on the U-shaped groove, and the end of the support plate (6) away from the sleeve (8) is fixed on the vertical rod (7).

8. The transformer bushing with auxiliary support device according to claim 7, characterized in that: The support plate (6) away from the transformer abuts against the upper end side wall of the bushing (8).

9. The transformer bushing with auxiliary support device according to claim 5, characterized in that: The axes of the fixing ring (1), the threading ring (18) and the transition ring (9) all coincide with the axis of the sleeve (8).

10. The transformer bushing with auxiliary support device according to claim 5, characterized in that: A terminal (4) connected to a conductor is installed at the top end of the sleeve (8), and the connection between the terminal (4) and the conductor is located between the transition ring (9) and the fixing ring (1).

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