A transformer bushing that is easy to replace

Abstract

The utility model relates to the technical field of transformers, and in particular to a transformer bushing that is easy to replace, comprising a bushing and an insertion portion, wherein the bottom of the bushing is integrally arranged with the insertion portion, and multiple groups of anti-touch components distributed up and down are installed on the outer side of the insertion portion, and the top of the bushing is connected with a pressure relief component; the anti-touch component comprises a fixed ring and a rotating ball, the inner side of the fixed ring is fixedly connected with the insertion portion, and multiple groups of evenly distributed rotating balls are rotatably connected inside the fixed ring; when the utility model is in use, multiple groups of fixed rings are arranged on the outer side of the insertion portion, and multiple rotatable rotating balls are installed inside the fixed ring. At this time, when the insertion portion is inserted into the interior of the transformer, even if a collision occurs, the fixed ring is in contact with the transformer in advance, and the rotating balls arranged can smoothly resolve the force generated by the contact by their own rotation, which helps to ensure smooth installation of the bushing.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a transformer bushing which is easy to replace. Background Art

[0002] The transformer bushing is the main insulating device 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. It also serves to fix the lead wires. Due to different voltage levels, the insulating bushings are available in pure porcelain bushings, oil-filled bushings, and capacitor bushings. Pure porcelain bushings are used for low-voltage transformers. A conductive copper rod is inserted into the porcelain bushing, and the inside of the porcelain bushing is air-insulated. Oil-filled bushings are mostly used for high-voltage transformers. The porcelain bushing is filled with oil, and a conductive copper rod is inserted into the porcelain bushing, and the copper rod is wrapped with insulating paper.

[0003] When replacing some large transformers, it is necessary to use lifting equipment to lift the bushing and then insert it into the transformer smoothly, and align and install it through the flange. Sometimes the bushing is not installed vertically, and sometimes the bushing needs to be inserted into the transformer at a certain tilt angle. At this time, the replacement of the bushing will bring certain difficulties. The inserted part of the bushing often contacts and collides with the inside of the transformer and is damaged to a certain extent. Therefore, a transformer bushing that is easy to replace is proposed to address the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a transformer bushing that is easy to replace, so as to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] As an optional solution of the transformer bushing that is easy to replace described in the utility model, wherein: a transformer bushing that is easy to replace comprises a bushing and an insertion portion, the bottom of the bushing is integrally arranged with the insertion portion, and a plurality of groups of anti-touch components distributed up and down are installed on the outer side of the insertion portion, and the top of the bushing is connected to a pressure relief component;

[0007] The anti-touch assembly includes a fixed ring and a rotating ball, the inner side of the fixed ring is fixedly connected to the insertion portion, and the interior of the fixed ring is rotatably connected to multiple groups of evenly distributed rotating balls;

[0008] The pressure relief assembly includes a mounting plate, an air pressure chamber and an automatic pressure relief body. The top of the mounting plate is fixedly connected to the air pressure chamber, and the side of the air pressure chamber is connected to the automatic pressure relief body. The other end of the automatic pressure relief body is connected to the insulating oil chamber of the bushing.

[0009] When replacing some large transformers, it is necessary to use lifting equipment to lift the bushing and then insert it smoothly into the transformer, and align and install it through the flange. Sometimes the bushing is not installed vertically, and sometimes the bushing needs to be inserted into the transformer at a certain tilt angle. At this time, the replacement of the bushing will bring certain difficulties. The inserted part of the bushing often contacts and collides with the inside of the transformer and is damaged to a certain extent. When the device is in use, multiple sets of fixing rings are arranged on the outside of the inserted part, and multiple rotatable rotating balls are installed inside the fixing ring. At this time, when the inserted part is inserted into the transformer, even if a collision occurs, the fixing ring is in contact with the transformer in advance, and the rotating ball can smoothly resolve the force generated by the contact by its own rotation, which helps to ensure the smooth installation of the bushing. The pressure relief component can realize the automatic release of the gas inside the bushing, and the gas is located in the air pressure chamber for automatic collection and treatment.

[0010] As an optional solution for the transformer bushing that is easy to replace described in the utility model, the interior of the air pressure chamber is fixedly connected with a liquid collecting mesh, and the bottom of the liquid collecting mesh is fixedly connected with multiple groups of collecting buckets with downward-facing pointed ends, and a drain plug is also installed on the side of the air pressure chamber.

[0011] As an optional solution for a transformer bushing that is easy to replace as described in the utility model, the top of the air pressure chamber is provided with a top cover and a second sealing plate, and the second sealing plate is installed at the bottom of the top cover, the bottom of the top cover is fixedly connected with a pull-down rod, and the pull-down rod passes through the upper and lower end surfaces of the second sealing plate, the bottom of the pull-down rod is fixedly connected with a second spring, and the bottom of the second spring is fixedly connected to the liquid collecting mesh.

[0012] As an optional solution for the transformer bushing that is easy to replace described in the utility model, the lower pull rod is arranged in a T shape.

[0013] When the gas enters the air pressure chamber, the gas contains a small amount of oil. The oil can be captured by the liquid collecting mesh and collected to the bottom through the collecting bucket and dripped for centralized collection. The oil can be collected by opening the drain plug. When the gas is inside the air pressure chamber, the top cover and the second sealing plate can ensure the residence time of the gas in the air pressure chamber. When the pressure reaches a certain level, the gas squeezes the top cover and the second spring is stretched, and the gas can be discharged smoothly.

[0014] As an optional solution for the transformer bushing that is easy to replace described in the utility model, the automatic pressure relief body includes a pressure relief pipe, a sliding plate and a first sealing plate, one end of the pressure relief pipe is fixedly connected to the air pressure chamber, the other end of the pressure relief pipe is communicated with the bushing, the interior of the pressure relief pipe is slidably connected with the sliding plate, and one end of the sliding plate is fixedly connected with the first sealing plate, the other end of the sliding plate is fixedly connected with a guide rod, and the outer side of the guide rod is slidably connected to the pressure relief pipe.

[0015] As an optional solution for the transformer bushing that is easy to replace described in the utility model, a first pressure relief channel is opened inside the sliding plate and the first sealing plate, and a second pressure relief channel is opened above the pressure relief pipe.

[0016] As an optional solution for the transformer bushing that is easy to replace described in the utility model, a first spring is arranged on the outer side of the guide rod, one end of the first spring is fixedly connected to the pressure relief pipe, and the other end of the first spring is fixedly connected to the sliding plate.

[0017] As an optional solution for the transformer bushing that is easy to replace described in the utility model, wherein: the outer side of the guide rod is also fixedly connected to a limiting plate.

[0018] During the long-term use of the sleeve, the pressurized gas inside it needs to be released in time. The general releasing method is to manually rotate the pressure relief bolt to align the internal holes to achieve release. Once the pressure relief bolt is excessively rotated, it will cause separation from the body, and the oil will flow out and be wasted. Once the pressure relief bolt is not rotated into place, the pressurized gas cannot be released. At this time, through the set rotating ball, when the internal pressure reaches a certain level, the first sealing plate is squeezed by the gas. At this time, the sliding plate moves, and the first pressure relief channel and the second pressure relief channel are aligned, so that the gas can be discharged smoothly and released. During operation, when the first sealing plate is squeezed and moved, its guide rod can ensure its smooth movement. After the limit plate contacts the pressure relief pipe, the first pressure relief channel and the second pressure relief channel are accurately aligned, and the set first spring can ensure that the first sealing plate automatically resets after the pressure relief is completed.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] When the utility model is in use, multiple groups of fixing rings are arranged on the outside of the insertion part, and multiple rotatable rotating balls are installed inside the fixing rings. At this time, when the insertion part is inserted into the transformer, even if a collision occurs, the fixing ring is in contact with the transformer in advance, and the rotating balls can smoothly resolve the force generated by the contact by their own rotation, which helps to ensure the smooth installation of the bushing;

[0021] During the long-term use of the casing, the pressurized gas inside it needs to be released in time. The general release method is to manually rotate the pressure relief bolt to align the internal holes to achieve release. Once the pressure relief bolt is rotated too much, it will cause separation from the body, and the oil will flow out and be wasted. Once the pressure relief bolt is not rotated in place, the pressurized gas cannot be released. At this time, through the set pressure relief component, when the internal pressure reaches a certain level, the gas squeezes the first sealing plate, and the sliding plate moves, the first pressure relief channel and the second pressure relief channel are aligned, and the gas can be discharged smoothly and released;

[0022] During operation, when the first sealing plate is squeezed and moved, the guide rod can ensure its smooth movement, and after the limit plate contacts the pressure relief pipe, the first pressure relief channel and the second pressure relief channel are precisely aligned, and the first spring can ensure that the first sealing plate automatically resets after the pressure relief is completed;

[0023] When the gas enters the air pressure chamber, it contains a small amount of oil. The oil can be captured by the liquid collecting mesh and collected at the bottom through the collecting bucket and dripped for centralized collection. The oil can be collected by opening the drain plug.

[0024] When the gas is inside the air pressure chamber, the top cover and the second sealing plate can ensure the residence time of the gas in the air pressure chamber. When the pressure reaches a certain level, the gas squeezes the top cover and the second spring is stretched, and the gas can be discharged smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the anti-touch component of the utility model;

[0027] Figure 3 It is a structural schematic diagram of the pressure relief assembly of the utility model;

[0028] Figure 4 It is a structural schematic diagram of the automatic pressure relief body of the utility model.

[0029] In the figure: 1. sleeve; 2. insertion part; 3. anti-touch component; 301. fixing ring; 302. rotating ball; 4. pressure relief component; 401. mounting plate; 402. air pressure chamber; 403. automatic pressure relief body; 4031. pressure relief pipe; 4032. sliding plate; 4033. first sealing plate; 4034. first pressure relief channel; 4035. guide rod; 4036. limit plate; 4037. first spring; 4038. second pressure relief channel; 404. drain plug; 405. liquid collecting mesh; 406. collecting bucket; 407. top cover; 408. second sealing plate; 409. pull-down rod; 410. second spring. DETAILED DESCRIPTION

[0030] 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.

[0031] Example 1

[0032] See also Figure 1 , Figure 2 and Figure 3 , the utility model provides a technical solution:

[0033] A transformer bushing that is easy to replace, comprising a bushing 1 and an insertion portion 2, wherein the bottom of the bushing 1 is integrally arranged with the insertion portion 2, and a plurality of groups of anti-touch components 3 distributed up and down are installed on the outer side of the insertion portion 2, and the top of the bushing 1 is connected to a pressure relief component 4;

[0034] The anti-touch assembly 3 includes a fixed ring 301 and a rotating ball 302. The inner side of the fixed ring 301 is fixedly connected to the insertion portion 2. The interior of the fixed ring 301 is rotatably connected to a plurality of groups of evenly distributed rotating balls 302.

[0035] The pressure relief assembly 4 includes a mounting plate 401, an air pressure chamber 402 and an automatic pressure relief body 403. The top of the mounting plate 401 is fixedly connected to the air pressure chamber 402, and the side of the air pressure chamber 402 is connected to the automatic pressure relief body 403. The other end of the automatic pressure relief body 403 is connected to the insulating oil chamber of the bushing 1.

[0036] When replacing some large transformers, it is necessary to use lifting equipment to lift the bushing and then smoothly insert it into the transformer, and align and install it through the flange. Sometimes the bushing is not installed vertically, and sometimes the bushing needs to be inserted into the transformer at a certain tilt angle. At this time, the replacement of the bushing will bring certain difficulties. The insertion part of the bushing often contacts and collides with the inside of the transformer and is damaged to a certain extent. When the device is in use, multiple sets of fixing rings 301 are arranged on the outside of the insertion part 2, and multiple rotatable rotating balls 302 are installed inside the fixing ring 301. At this time, when the insertion part 2 is inserted into the transformer, even if a collision occurs, the fixing ring 301 contacts the transformer in advance, and the rotating ball 302 can smoothly resolve the force generated by the contact by its own rotation, which helps to ensure the smooth installation of the bushing. The pressure relief component 4 can realize the automatic release of the gas inside the bushing 1, and the gas is located in the air pressure chamber 402 for automatic collection and treatment;

[0037] In this embodiment, the fixing ring 301 and the rotating ball 302 are both made of insulating hard plastic, which can ensure that the device has good insulation.

[0038] Example 2

[0039] This embodiment is an improvement on embodiment 1. Figure 3 Specifically, the interior of the air pressure chamber 402 is fixedly connected with a liquid collecting mesh 405, and the bottom of the liquid collecting mesh 405 is fixedly connected with multiple groups of collecting buckets 406 with pointed ends facing downward, and a drain plug 404 is also installed on the side of the air pressure chamber 402.

[0040] The top of the air pressure chamber 402 is provided with a top cover 407 and a second sealing plate 408, and the second sealing plate 408 is installed at the bottom of the top cover 407, the bottom of the top cover 407 is fixedly connected with a pull-down rod 409, and the pull-down rod 409 passes through the upper and lower end surfaces of the second sealing plate 408, the bottom of the pull-down rod 409 is fixedly connected with a second spring 410, and the bottom of the second spring 410 is fixedly connected to the liquid collection mesh 405.

[0041] The lower pull rod 409 is arranged in a T shape.

[0042] When the gas enters the air pressure chamber 402, the gas contains a small amount of oil. The oil can be captured by the liquid collecting mesh 405, and is collected to the bottom through the collecting bucket 406 and drips for centralized collection. The oil can be collected by opening the drain plug 404. When the gas is inside the air pressure chamber 402, the top cover 407 and the second sealing plate 408 provided therein can ensure the residence time of the gas in the air pressure chamber 402. When the pressure reaches a certain level, the gas squeezes the top cover 407, the second spring 410 is stretched, and the top cover 407 moves upward, and the gas can be discharged smoothly at this time.

[0043] Example 3

[0044] This embodiment is an improvement on embodiment 2. Figure 4 Specifically, the automatic pressure relief body 403 includes a pressure relief pipe 4031, a sliding plate 4032 and a first sealing plate 4033. One end of the pressure relief pipe 4031 is fixedly connected to the air pressure chamber 402, and the other end of the pressure relief pipe 4031 is connected to the sleeve 1. The interior of the pressure relief pipe 4031 is slidably connected with the sliding plate 4032, and one end of the sliding plate 4032 is fixedly connected with the first sealing plate 4033. The other end of the sliding plate 4032 is fixedly connected with a guide rod 4035, and the outer side of the guide rod 4035 is slidably connected with the pressure relief pipe 4031.

[0045] A first pressure relief passage 4034 is opened inside the sliding plate 4032 and the first sealing plate 4033 , and a second pressure relief passage 4038 is opened above the pressure relief pipe 4031 .

[0046] A first spring 4037 is disposed on the outer side of the guide rod 4035 , one end of the first spring 4037 is fixedly connected to the pressure relief pipe 4031 , and the other end of the first spring 4037 is fixedly connected to the sliding plate 4032 .

[0047] The outer side of the guide rod 4035 is also fixedly connected to a limiting plate 4036 .

[0048] When the sleeve is used for a long time, the pressurized gas inside it needs to be released in time. The general release method is to manually rotate the pressure relief bolt to align the internal holes to achieve release. Once the pressure relief bolt is excessively rotated, it will cause separation from the body, and the oil will flow out and be wasted. Once the pressure relief bolt is not rotated into place, the pressurized gas cannot be released. At this time, through the provided rotating ball 4, when the internal pressure reaches a certain level, the first sealing plate 4033 is squeezed by the gas. At this time, the sliding plate 4032 moves, and the first pressure relief channel 4034 and the second pressure relief channel 4038 are aligned, so that the gas can be discharged smoothly and released. During operation, when the first sealing plate 4033 is squeezed and moved, its guide rod 4035 can ensure its smooth movement, and after the limit plate 4036 contacts the pressure relief pipe 4031, the first pressure relief channel 4034 and the second pressure relief channel 4038 are accurately aligned, and the provided first spring 4037 can ensure that the first sealing plate 4033 automatically resets after the pressure relief is completed.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although 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 transformer bushing that is easy to replace, characterized in that: The invention comprises a sleeve (1) and an insertion portion (2), wherein the bottom of the sleeve (1) and the insertion portion (2) are integrally arranged, and a plurality of groups of anti-touch components (3) distributed vertically are installed on the outer side of the insertion portion (2), and the top of the sleeve (1) is connected to a pressure relief component (4); The anti-touch component (3) comprises a fixed ring (301) and rotating balls (302), the inner side of the fixed ring (301) is fixedly connected to the insertion portion (2), and the interior of the fixed ring (301) is rotatably connected to a plurality of groups of evenly distributed rotating balls (302); The pressure relief assembly (4) comprises a mounting plate (401), an air pressure chamber (402) and an automatic pressure relief body (403); the top of the mounting plate (401) is fixedly connected to the air pressure chamber (402), and the side of the air pressure chamber (402) is connected to the automatic pressure relief body (403); the other end of the automatic pressure relief body (403) is connected to the insulating oil chamber of the bushing (1).

2. The easily replaceable transformer bushing according to claim 1, characterized in that: The interior of the air pressure chamber (402) is fixedly connected to a liquid collecting mesh (405), and the bottom of the liquid collecting mesh (405) is fixedly connected to multiple groups of collecting buckets (406) with pointed ends facing downwards, and a drain plug (404) is also installed on the side of the air pressure chamber (402).

3. The easily replaceable transformer bushing according to claim 1, characterized in that: The top of the air pressure chamber (402) is provided with a top cover (407) and a second sealing plate (408), and the second sealing plate (408) is installed at the bottom of the top cover (407), the bottom of the top cover (407) is fixedly connected with a pull-down rod (409), and the pull-down rod (409) passes through the upper and lower end surfaces of the second sealing plate (408), the bottom of the pull-down rod (409) is fixedly connected with a second spring (410), and the bottom of the second spring (410) is fixedly connected to the liquid collection mesh (405).

4. The easily replaceable transformer bushing according to claim 3, characterized in that: The lower pull rod (409) is arranged in a T shape.

5. The easily replaceable transformer bushing according to claim 1, characterized in that: The automatic pressure relief body (403) comprises a pressure relief pipe (4031), a sliding plate (4032) and a first sealing plate (4033); one end of the pressure relief pipe (4031) is fixedly connected to the air pressure chamber (402); the other end of the pressure relief pipe (4031) is communicated with the sleeve (1); the interior of the pressure relief pipe (4031) is slidably connected to the sliding plate (4032); one end of the sliding plate (4032) is fixedly connected to the first sealing plate (4033); the other end of the sliding plate (4032) is fixedly connected to a guide rod (4035); the outer side of the guide rod (4035) is slidably connected to the pressure relief pipe (4031).

6. The easily replaceable transformer bushing according to claim 5, characterized in that: A first pressure relief channel (4034) is provided inside the sliding plate (4032) and the first sealing plate (4033), and a second pressure relief channel (4038) is provided above the pressure relief pipe (4031).

7. The easily replaceable transformer bushing according to claim 5, characterized in that: A first spring (4037) is arranged on the outer side of the guide rod (4035), one end of the first spring (4037) is fixedly connected to the pressure relief pipe (4031), and the other end of the first spring (4037) is fixedly connected to the sliding plate (4032).

8. The easily replaceable transformer bushing according to claim 5, characterized in that: The outer side of the guide rod (4035) is also fixedly connected to a limiting plate (4036).

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