Connecting plate structure for preventing transformer positioning pin sheath from loosening

Abstract

The utility model relates to the technical field of transformers, and discloses a connecting plate structure for preventing transformer positioning pin sheaths from loosening, which comprises at least two positioning pin thread bushings and a connecting plate, the tops of the positioning pin thread bushings are fixedly connected with first bolts, the middle of the connecting plate is provided with at least two through holes, and the first bolts are fixedly connected with the connecting plate. The bottom of the first bolt is placed in the through hole, the diameter of the first bolt is the same as that of the through hole, and the outer side of the first bolt is in threaded connection with a first nut. According to the utility model, the three independent positioning pin thread bushings at the same side of the transformer are fixed together, and the fixing and anti-loosening effects of the positioning pin thread bushings of the transformer can be realized only by additionally arranging the connecting plate outside, so that the mutual vibration can be mutually restricted, the oil leakage phenomenon caused by loosening due to vibration is avoided, and the safety and stability are improved; meanwhile, due to the characteristics of long service life, good corrosion resistance and the like, the later maintenance cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a connecting plate structure for preventing a transformer positioning pin sheath from loosening. Background Art

[0002] An on-site investigation and statistics revealed that the Ludila Power Plant has a total of 19 main transformers. Of the 18 transformers with iron core and clamp-type locating pins, 12 experienced oil leakage caused by loose threaded sleeves. Despite replacing the sealing rings and repeatedly tightening the threaded sleeves, the oil leakage problem remained unresolved. After prolonged operation, the threaded sleeves loosen again, causing oil leakage. Furthermore, long-term leakage from the locating pins at the bottom of the transformers can lead to moisture intrusion and a drop in the oil level. In severe cases, this can even cause a minor gas fault, compromising the safe and stable operation of the main transformers. Utility Model Content

[0003] In order to make up for the above deficiencies, the utility model provides a connecting plate structure for preventing the transformer positioning pin sleeve from loosening, aiming to improve the oil leakage problem of the transformer positioning pin threaded sleeve.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a connecting plate structure for preventing the loosening of the transformer positioning pin sheath, comprising at least two positioning pin threaded sleeves and a connecting plate, the top of the positioning pin threaded sleeve being fixedly connected with a first bolt, the middle of the connecting plate being provided with at least two through holes, the bottom of the first bolt being placed in the through hole, and the diameter of the first bolt being the same as the diameter of the through hole, and the outer side of the first bolt being threadedly connected with a first nut.

[0005] As a further description of the above technical solution: the number of the through holes on the positioning pin threaded sleeve and the connecting plate are both three.

[0006] As a further description of the above technical solution: metal gaskets are provided on both sides of the through hole of the connecting plate, rubber gaskets are provided on the opposite sides of the two metal gaskets, and the two rubber gaskets are located between the first nut and the positioning pin threaded sleeve.

[0007] As a further description of the above technical solution: a fixing plate is fixedly connected to the middle of the connecting plate, a second bolt is provided in the middle of the fixing plate, a rubber sleeve is provided on the outside of the second bolt, an upper connecting plate is provided on the outside of the rubber sleeve, one end of the upper connecting plate is fixedly connected to a spring shock absorber, one end of the second bolt is threadedly connected to a second nut, and one side of the second nut is connected to one side of the rubber sleeve.

[0008] As a further description of the above technical solution: the bottom end of the spring shock absorber is fixedly connected to a lower connecting plate, the middle part of the lower connecting plate is connected to a third bolt, a connecting plate is provided on the outer side of the third bolt, a third nut is provided on one side of the connecting plate, and the middle part of the third nut is threadedly connected to one end of the third bolt.

[0009] As a further description of the above technical solution: the central axis of the spring shock absorber and the central axis of the positioning pin threaded sleeve are distributed obliquely.

[0010] As a further description of the above technical solution: the two spring shock absorbers on the same side are symmetrically distributed about the central axis of the connecting plate.

[0011] The utility model has the following beneficial effects:

[0012] 1. In this utility model, three independent positioning pins on the same side of the transformer are fixed together by screw sleeves. They can restrain each other's vibration, avoid loosening due to vibration and causing oil leakage, and improve safety and stability.

[0013] 2. The present invention adopts a simple structural design, and can achieve the effect of fixing and preventing the transformer positioning pin thread sleeve from loosening only by adding a connecting plate on the outside. Compared with the traditional fastening method (such as dripping thread locking glue on the thread of the thread sleeve), the design of the present invention is simpler and more efficient.

[0014] 3. In the present invention, due to the simple structural design and reasonable material selection, the installation and maintenance of the present invention are relatively easy to carry out. At the same time, its long service life and good corrosion resistance are also conducive to reducing the subsequent maintenance costs.

[0015] 4. In the present invention, the designed rubber sleeve, spring shock absorber, second nut and upper connecting plate play an auxiliary supporting role, further improving the seismic resistance and stability of the transformer positioning pin thread sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional view of the first bolt of a connecting plate structure for preventing the transformer positioning pin sheath from loosening, proposed by the utility model;

[0017] Figure 2 This is a plan view of the first bolt of a connecting plate structure for preventing the transformer positioning pin sheath from loosening, proposed by the utility model;

[0018] Figure 3 This is a three-dimensional diagram of a spring shock absorber of a connecting plate structure for preventing the transformer positioning pin sheath from loosening, proposed by the utility model;

[0019] Figure 4This is a plan view of a spring shock absorber with a connecting plate structure for preventing a transformer positioning pin shield from loosening, as proposed by the utility model.

[0020] Legend:

[0021] 1. Positioning pin threaded sleeve; 2. Connecting plate; 3. Metal gasket; 4. Rubber gasket; 5. First bolt; 6. First nut; 7. Spring shock absorber; 701. Lower connecting plate; 702. Upper connecting plate; 8. Connecting plate; 9. Fixing plate; 10. Second bolt; 101. Second nut; 102. Rubber sleeve; 11. Third bolt. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Reference Figures 1-4 The present invention provides an embodiment of a connecting plate structure for preventing a transformer locating pin shield from loosening, comprising at least two locating pin threaded sleeves 1 and a connecting plate 2. A first bolt 5 is fixedly connected to the top of the locating pin threaded sleeve 1. The connecting plate 2 has at least two through-holes disposed in the middle thereof. The bottoms of the first bolts 5 are positioned within the through-holes, and the diameter of the first bolts 5 is the same as that of the through-holes. A first nut 6 is threadedly connected to the outer sides of the first bolts 5. Preferably, both the locating pin threaded sleeve 1 and the connecting plate 2 have three through-holes.

[0024] By opening a through hole on the connecting plate 2, the connecting plate 2 is sleeved on the first bolt 5 through the through hole, and the positioning pin threaded sleeve 1 is connected together. The connecting plate 2 and the positioning pin threaded sleeve 1 are fixed by the first bolt 5. This can restrain each other's vibration and reduce the problem of oil leakage caused by loosening of the positioning pin threaded sleeve 1 due to vibration.

[0025] In one embodiment, three independent positioning pin threaded sleeves (1) are welded to the tops of the three independent positioning pin threaded sleeves (1) on the same side of the transformer. A piece of hot-dip galvanized flat iron with a length of 33 cm, a width of 5 cm, and a thickness of 0.5 cm is used as a connecting plate (2). Three holes are drilled in the connecting plate (2) with a Ø10 drill bit, with a spacing of 12.5 cm. The three independent positioning pin threaded sleeves (1) are fixed together. This prevents vibrations from interfering with each other.

[0026] Metal washers 3 are installed on both sides of the through-hole of the connecting plate 2. Rubber washers 4 are installed on the sides away from each other. Both rubber washers 4 are located between the first nut 6 and the positioning pin threaded sleeve 1. At the same time, the rubber washers 4 are installed on both sides of the connecting plate 2 for shock absorption, completely eliminating the phenomenon of oil leakage caused by loosening of the threaded sleeve due to vibration.

[0027] refer to Figure 3 and Figure 4 In order to further improve the stability and seismic resistance of the positioning pin threaded sleeve 1, in the utility model, the middle of the connecting plate 2 is fixedly connected with a fixing plate 9, the middle of the four fixing plates 9 are connected with a second bolt 10, the outer side of the second bolt 10 is provided with a rubber sleeve 102, the outer side of the rubber sleeve 102 is provided with an upper connecting plate 702, one end of the upper connecting plate 702 is fixedly connected to the spring shock absorber 7, one end of the second bolt 10 is threadedly connected to the second nut 101, and one side of the second nut 101 is connected to one side of the rubber sleeve 102.

[0028] Specifically, an annular groove is provided in the middle of the rubber sleeve 102, and the inner side of the upper connecting plate 702 is sleeved in the annular groove. The rubber sleeve 102 is clamped by the second nut 101 and the second bolt 10, and then the upper connecting plate 702 is clamped. At the same time, the rubber sleeve 102 can play a shock-absorbing effect. The spring shock absorber 7 is designed to further fix the connecting plate 2, play an auxiliary supporting role, and improve the shock resistance and stability.

[0029] The bottom end of the spring shock absorber 7 is fixedly connected to the lower connecting plate 701, the middle of the lower connecting plate 701 is connected to the third bolt 11, a connecting plate 8 is provided on the outside of the third bolt 11, a third nut is provided on one side of the connecting plate 8, and the middle part of the third nut is threadedly connected to one end of the third bolt 11.

[0030] The connecting piece 8 and the lower connecting plate 701 are fixed by using the third bolt 11 and the third nut. During installation, the connecting piece 8 is then installed on the transformer housing to fix the spring shock absorber 7 .

[0031] The central axis of the spring shock absorber 7 is inclined with respect to the central axis of the positioning pin threaded sleeve 1. The spring shock absorber 7 is inclined with respect to the positioning pin threaded sleeve 1, and the left and right spring shock absorbers 7 are inclined with respect to each other, and the front and rear spring shock absorbers 7 are inclined with respect to each other, so as to form a stable triangular structure, making the support more stable.

[0032] The two spring shock absorbers 7 on the same side are symmetrically distributed about the central axis of the connecting plate 2. The spring shock absorbers 7 are symmetrically distributed on both sides of the positioning pin threaded sleeve 1, stably supporting the positioning pin threaded sleeve 1 and improving the shock absorption performance.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A connecting plate structure for preventing a transformer positioning pin sheath from loosening, comprising at least two positioning pin threaded sleeves (1) and a connecting plate (2), characterized in that: The top of the positioning pin threaded sleeve (1) is fixedly connected with a first bolt (5), the middle of the connecting plate (2) is provided with at least two through holes, the bottom of the first bolt (5) is placed in the through hole, and the diameter of the first bolt (5) is the same as the diameter of the through hole, and the outer side of the first bolt (5) is threadedly connected with a first nut (6).

2. The connecting plate structure for preventing the loosening of the transformer positioning pin sheath according to claim 1 is characterized in that: The number of through holes on the positioning pin threaded sleeve (1) and the connecting plate (2) are both three.

3. The connecting plate structure for preventing the loosening of the transformer positioning pin sheath according to claim 2 is characterized in that: Metal gaskets (3) are provided on both sides of the through hole of the connecting plate (2), rubber gaskets (4) are provided on the sides away from each other of the two metal gaskets (3), and the two rubber gaskets (4) are located between the first nut (6) and the positioning needle threaded sleeve (1).

4. The connecting plate structure for preventing the loosening of the transformer positioning pin sheath according to claim 2 is characterized in that: A fixing plate (9) is fixedly connected to the middle of the connecting plate (2) around the periphery, a second bolt (10) is provided in the middle of the fixing plate (9), a rubber sleeve (102) is provided on the outer side of the second bolt (10), an upper connecting plate (702) is provided on the outer side of the rubber sleeve (102), one end of the upper connecting plate (702) is fixedly connected to a spring shock absorber (7), one end of the second bolt (10) is threadedly connected to a second nut (101), and one side of the second nut (101) is connected to one side of the rubber sleeve (102).

5. The connecting plate structure for preventing the transformer positioning pin sheath from loosening according to claim 4, characterized in that: The bottom end of the spring shock absorber (7) is fixedly connected to a lower connecting plate (701), the middle of the lower connecting plate (701) is connected to a third bolt (11), a connecting piece (8) is provided on the outer side of the third bolt (11), a third nut is provided on one side of the connecting piece (8), and the middle part of the third nut is threadedly connected to one end of the third bolt (11).

6. The connecting plate structure for preventing the transformer positioning pin sheath from loosening according to claim 5, characterized in that: The central axis of the spring shock absorber (7) and the central axis of the positioning needle threaded sleeve (1) are distributed obliquely.

7. The connecting plate structure for preventing the transformer positioning pin sheath from loosening according to claim 5, characterized in that: The two spring shock absorbers (7) on the same side are symmetrically distributed about the central axis of the connecting plate (2).

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