Corrugated pipe with limiting function for large power transformer pipeline

Abstract

The invention discloses a corrugated pipe with a limiting function for a large power transformer pipeline. The corrugated pipe comprises a corrugated pipe body for the large power transformer pipeline and a limiting assembly. The corrugated pipe body comprises a corrugated body and a flange plate body; the two flange plate bodies are symmetrically and fixedly arranged on the two sides of the corrugated body. The limiting assembly is arranged on the flange plate body; the limiting assembly comprises a fixed plate, a fixed frame and a rotating plate; the plurality of fixing plates are uniformly and fixedly arranged on the circumferential surface of the flange plate body; the two fixing frames are symmetrically and fixedly arranged on the opposite faces of the upper fixing plate and the lower fixing plate. The number of the rotating plates is four, and every two adjacent rotating plates are rotationally connected through a rotating shaft. The corrugated pipe with the limiting function for the large-scale power transformer pipeline is simple and reasonable in structure, ingenious in design and reliable in performance, and effectively prevents the corrugated pipe body from being damaged due to overlarge deformation in special scenes, so that safe operation of a large-scale power transformer is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of transformer manufacturing, in particular to a corrugated pipe with a limiting function used for a pipeline of a large power transformer. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, secondary coil and iron core (magnetic core). Its main functions include: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc. Transformers are basic equipment for power transmission and distribution, and are widely used in industry, agriculture, transportation, urban communities and other fields.

[0003] For example, a bellows provided by the Chinese invention patent with publication number CN217993711U comprises a bellows body, the bellows body comprises a base layer, the bottom of the base layer is sprayed with an acid-alkali resistant layer, the top of the base layer is bonded with a fireproof layer by an adhesive, the top of the fireproof layer is bonded with a corrosion-resistant layer by an adhesive, the corrosion-resistant layer comprises a first corrosion-resistant layer, the top of the first corrosion-resistant layer is bonded with a second corrosion-resistant layer by an adhesive, the base layer is made of high-density polyethylene, the surface of the base layer is sprayed with an antibacterial agent, the acid-alkali resistant layer is made of fluororubber, and its inner surface is sprayed with Teflon coating liquid. The present invention can make the bellows body have good use strength, fire resistance and corrosion resistance through the coordinated use of the base layer, the acid-alkali resistant layer, the fireproof layer, the corrosion-resistant layer, the first corrosion-resistant layer and the second corrosion-resistant layer, and is also convenient for environmental protection treatment, which can meet people's growing use needs and bring great convenience to users.

[0004] With the diversity of transformer pipeline layout, the number of connecting parts of transformer pipelines has increased accordingly. Due to multiple factors such as the accumulation of manufacturing tolerances, bellows are required between transformer connecting pipelines. Traditional bellows are composed of a section of retractable and adjustable bellows and flanges at both ends. In special scenarios, the bellows are often damaged due to excessive deformation, which leaves hidden dangers for the safe operation of the transformer. Summary of the invention

[0005] The object of the present invention is to provide a bellows with a limiting function for use in large power transformer pipelines, so as to solve the problem of difficulty in limiting the deformation amount of the bellows mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A bellows with a limiting function for a large power transformer pipeline, comprising a bellows body and a limiting assembly for a large power transformer pipeline; the bellows body comprises a bellows body and a flange body; two flange bodies are symmetrically fixed on both sides of the bellows body, and the flange body is connected to the large power transformer pipeline by bolts; the limiting assembly is arranged on the flange body; the number of the limiting assemblies is at least two groups, and the two groups of the limiting assemblies are symmetrically arranged, and the bellows body has telescopic elasticity along the axis direction thereof; the limiting assembly comprises a fixed plate, a fixed frame and a rotating plate; a plurality of the fixed plates are fixed on the circumferential surface of the flange body in an annular array; two fixed frames are symmetrically fixed on the opposite surfaces of the upper and lower fixed plates; the number of the rotating plates is four, and two adjacent rotating plates are rotationally connected by a rotating shaft; the two fixed frames are rotationally connected to two of the rotating shafts.

[0007] Preferably, the fixing frame is a U-shaped structure, and the end of the rotating plate does not contact the inner wall of the fixing frame.

[0008] Preferably, both ends of the rotating plate are arc-shaped ends, a prismatic structure is formed between the four rotating plates, and a bellows limiting cavity is formed between the four rotating plates.

[0009] Preferably, it further comprises a connecting component; the connecting component is arranged between two adjacent rotating plates.

[0010] Preferably, the connecting assembly comprises a connecting plate and a connecting spring plate; the two connecting plates are fixedly arranged on two adjacent rotating plates, and the two connecting plates are fixedly connected via the connecting spring plate.

[0011] Preferably, the connecting plate is an inclined structure, and the structural opening direction formed by the two connecting plates is arranged outward.

[0012] Preferably, the connecting spring plate is an arc-shaped structure, and the two connecting plates and the connecting spring plate form a bow-shaped structure.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention sets a limit assembly. When the bellows body is deformed and stretched, the two fixed plates drive the fixed frame to move away from each other, so that the four rotating plates rotate two by two through the rotating shaft, and the two adjacent connecting plates move. The rotating plate can not only limit the elongation and compression of the bellows body in the horizontal direction, but also limit the adjustment amount of the bellows body in the vertical direction through the rotation of the rotating plate. Compared with the prior art, the present invention has a simple and reasonable structure, ingenious design, and reliable performance. It effectively prevents the damage of the bellows body caused by excessive deformation in special scenarios, thereby ensuring the safe operation of large power transformers.

[0015] 2. The present invention sets a connecting component. When the rotating plate rotates, the two adjacent connecting plates will move, causing the connecting spring plate to be deformed by force. The relative force generated by the connecting spring plate can interact and repel the force generated by the deformation of the bellows body, so as to avoid damage to the bellows body due to excessive deformation, thereby extending the service life of the bellows body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of Example 1;

[0017] Figure 2 It is a partial structural schematic diagram of Example 1;

[0018] Figure 3 This is a schematic diagram of the disassembly of the limit component structure of Example 1;

[0019] Figure 4 This is a schematic diagram of the disassembly of the connection component structure of Example 1;

[0020] Figure 5 It is a schematic diagram of the overall structure of Example 2;

[0021] Figure 6 Schematic diagram of the structure of the bellows in various states of Example 2.

[0022] In the figure:

[0023] 1. Bellows body; 2. Limiting assembly; 3. Connecting assembly; 4. Connecting rod A; 5. Connecting rod B;

[0024] 101. bellows; 102. flange body;

[0025] 201, fixed plate; 202, fixed frame; 203, rotating plate;

[0026] 301, connecting plate; 302, connecting spring plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1:

[0029] See also Figures 1 to 4 The present invention provides a technical solution: a bellows with a limiting function for a large power transformer pipeline, comprising a bellows body 1 and a limiting assembly 2 for a large power transformer pipeline; the bellows body 1 comprises a bellows body 101 and a flange body 102; two flange bodies 102 are symmetrically fixed on both sides of the bellows body 101, and the flange bodies 102 are connected to the large power transformer pipeline by bolts; the limiting assembly 2 is arranged on the flange body 102; the limiting assembly 2 comprises a fixed plate 201, a fixed frame 202 and a rotating plate 203; the three fixed plates 2 01 is fixed on the circumferential surface of the flange body 102 in an annular array; two fixing frames 202 are symmetrically fixed on the opposite surfaces of the upper and lower fixing plates 201; there are four rotating plates 203, and two adjacent rotating plates 203 are rotatably connected through a rotating shaft; the two fixing frames 202 are rotatably connected to two of the rotating shafts; the fixing frames 202 are U-shaped structures, and the ends of the rotating plates 203 do not contact the inner walls of the fixing frames 202; the two ends of the rotating plates 203 are arc ends, and a prismatic structure is formed between the four rotating plates 203, and a bellows limiting cavity is formed between the four rotating plates 203.

[0030] It should be noted that the number of the limit components 2 is at least two, and the two groups of limit components 2 are symmetrically arranged. Figure 1 In the structure shown in the figure, the number of the limit components 2 is set to four groups, which are evenly distributed on the four sides of the bellows body 1, and the bellows body 1 has a telescopic elasticity along the axis direction thereof.

[0031] The present invention sets a limit assembly 2. When the bellows body 1 is deformed and stretched, the two fixed plates 201 will drive the fixed frame 202 to move away from each other, so that the four rotating plates 203 rotate two by two through the rotating axis, so that the two adjacent connecting plates 301 move, so that the rotating plate 203 can not only limit the elongation and compression of the bellows body 1 in the horizontal direction, but also limit the adjustment amount of the bellows body 1 in the vertical direction through the rotation of the rotating plate 203. Compared with the prior art, the present invention has a simple and reasonable structure, ingenious design, and reliable performance. It effectively prevents the damage of the bellows body 1 caused by excessive deformation in special scenarios, thereby ensuring the safe operation of large power transformers.

[0032] As a preferred embodiment, it also includes a connecting component 3; the connecting component 3 is arranged between two adjacent rotating plates 203; the connecting component 3 includes a connecting plate 301 and a connecting spring plate 302; the two connecting plates 301 are fixed on two adjacent rotating plates 203, and the two connecting plates 301 are fixedly connected by the connecting spring plate 302; the connecting plate 301 is an inclined structure, and the structural opening direction formed by the two connecting plates 301 is set outward; the connecting spring plate 302 is an arc structure, and the two connecting plates 301 and the connecting spring plate 302 form a bow structure, so that the connecting spring plate 302 can be more easily deformed by force.

[0033] The present invention sets a connecting component 3. When the rotating plate 203 rotates, the two adjacent connecting plates 301 will move, causing the connecting spring plate 302 to be deformed under force. The relative force generated by the connecting spring plate 302 can interact and repel the force generated when the bellows body 1 is deformed, so as to avoid damage to the bellows body 1 due to excessive deformation, thereby extending the service life of the bellows body 1.

[0034] Working principle: When the bellows body 1 is deformed and stretched, the two fixed plates 201 will drive the fixed frame 202 to move away from each other, so that the four rotating plates 203 rotate two by two through the rotating axis, so that the rotating plates 203 can not only limit the elongation and compression of the bellows body 1 in the horizontal direction, but also limit the adjustment amount of the bellows body 1 in the vertical direction by the rotation of the rotating plates 203. When the rotating plates 203 rotate, the two adjacent connecting plates 301 will move, so that the connecting spring plates 302 are deformed by force, so that the relative force generated by the connecting spring plates 302 can interact and repel with the force generated when the bellows body 1 is deformed, so as to avoid damage to the bellows body 1 due to excessive deformation.

[0035] Embodiment 2:

[0036] See also Figure 5 A corrugated pipe with a limiting function for a large power transformer pipeline comprises a corrugated body 101, a flange body 102, a connecting rod A4 and a connecting rod B5. In this embodiment, the limiting component 2 is the connecting rod A4 and the connecting rod B5; two flange bodies 102 are symmetrically fixed at both ends of the corrugated body 101;

[0037] In an optional embodiment, there are two connecting rods A4, and the connecting rods A4 are special screws without nuts; there are two connecting rods B5, and the connecting rods B5 are special screws with nuts and washers and double nuts for tightening, wherein the two connecting rods A4 limit the horizontal extension of the bellows 101, and the two connecting rods B5 limit the horizontal compression of the bellows, and the two flange bodies 102 are equipped with holes of specific diameters for the above four special screws, and the holes of this specific diameter limit the longitudinal adjustment amount of the bellows 101.

[0038] For details, please refer to Figure 6 The structural schematic diagram shown, from left to right, respectively, is a schematic diagram of the normal state of the bellows, a schematic diagram of the horizontal extension state of the bellows, a schematic diagram of the horizontal compression state of the bellows, and a schematic diagram of the longitudinal adjustment state of the bellows.

[0039] In an optional embodiment, the surfaces of the two groups of connecting rods A4 may also be partially threaded, and the surfaces of the two groups of connecting rods B5 may also be partially threaded. At the same time, corresponding nuts are provided on the outer side of the flange body 2, the connecting rods A4 and the connecting rods B5, and the nuts are moved on the threaded parts to compress the bellows 101 (bellows).

[0040] In another optional embodiment, both sets of connecting rods A4 and both sets of connecting rods B5 are threaded rods, wherein the nut portion connected to the surface of the connecting rod A4 is arranged on the inner side of the flange body 2, and the nut portion connected to the surface of the connecting rod B5 is arranged on the outer side of the flange body 2, the nut arranged on the inner side can adjust the extreme position of the inward movement of the flange body 2, and the nut arranged on the outer side can adjust the extreme position of the outward movement of the flange body 2.

[0041] The above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0042] 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 corrugated pipe with a limiting function for large power transformer pipelines, characterized in that: The invention comprises a bellows body (1) and a limit assembly (2) for a large power transformer pipeline; the bellows body (1) comprises a bellows (101) and a flange body (102); two flange bodies (102) are symmetrically fixed on both sides of the bellows (101), and the flange bodies (102) are connected to the large power transformer pipeline by bolts; the limit assembly (2) is arranged on the flange body (102); the number of the limit assemblies (2) is at least two groups, and the two groups of the limit assemblies (2) are symmetrically arranged; the bellows body (1) has telescopic elasticity along the central axis direction.

2. The bellows with a limiting function for large power transformer pipelines according to claim 1 is characterized in that: The limiting assembly (2) comprises a fixed plate (201), a fixed frame (202) and a rotating plate (203); a plurality of the fixed plates (201) are fixedly arranged on the circumferential surface of the flange body (102) in a ring array; two fixed frames (202) are symmetrically fixedly arranged on opposite surfaces of the upper and lower fixed plates (201); there are four rotating plates (203), and two adjacent rotating plates (203) are rotationally connected via a rotating shaft; and the two fixed frames (202) are rotationally connected to two of the rotating shafts.

3. The corrugated pipe with a limiting function for large power transformer pipeline according to claim 2 is characterized in that: The fixing frame (202) is a U-shaped structure, and the end of the rotating plate (203) does not contact the inner wall of the fixing frame (202).

4. The bellows with a limiting function for large power transformer pipelines according to claim 3 is characterized in that: Both ends of the rotating plate (203) are arc-shaped ends, a prism-shaped structure is formed between the four rotating plates (203), and a bellows limiting cavity is formed between the four rotating plates (203).

5. The bellows with a limiting function for large power transformer pipelines according to claim 4 is characterized in that: It also comprises a connecting component (3); the connecting component (3) is arranged between two adjacent rotating plates (203).

6. The corrugated pipe with a limiting function for large power transformer pipeline according to claim 5, characterized in that: The connection assembly (3) comprises a connection plate (301) and a connection spring plate (302); the two connection plates (301) are fixedly arranged on two adjacent rotating plates (203), and the two connection plates (301) are fixedly connected via the connection spring plate (302).

7. The bellows with a limiting function for large power transformer pipelines according to claim 6 is characterized in that: The connecting plate (301) is an inclined structure, and the structural opening direction formed by the two connecting plates (301) is arranged outward.

8. The corrugated pipe with a limiting function for large power transformer pipelines according to claim 7, characterized in that: The connecting spring plate (302) is an arc-shaped structure, and the two connecting plates (301) and the connecting spring plate (302) form a bow-shaped structure.

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