Core guide structure of horizontal external oil metal corrugated oil conservator for transformer

Abstract

The utility model belongs to the technical field of manufacturing of metal corrugated oil conservators for transformers, in particular to a core guide structure of a horizontal external oil metal corrugated oil conservator for a transformer, which is characterized in that a T-shaped transverse edge of a T-shaped guide rail is connected to a cylinder of the horizontal external oil metal corrugated oil conservator, and the end surface and two side surfaces of a T-shaped vertical edge are guide surfaces; the roller guide shoe and the sliding guide shoe are both mounted on the horizontal external oil metal corrugated oil conservator core body, the rolling guide shoe frame is connected with the horizontal external oil metal corrugated oil conservator core body, and a guide wheel in rolling contact with the T-shaped vertical edge guide surface is rotationally mounted on the rolling guide shoe frame; the sliding guide shoe frame is connected with a core body of the horizontal external oil metal corrugated oil conservator, and guide faces in sliding contact with the two side faces of the T-shaped vertical edge are installed on the sliding guide shoe frame. Compared with a traditional core body guide structure of the horizontal type external oil metal corrugated oil conservator, the core body guide structure has the advantages that the structure is simpler, the guide is more reliable, the operation is more stable, and the service life of the horizontal type external oil metal corrugated oil conservator is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of manufacturing metal corrugated oil conservator for transformers, specifically a core guiding structure for a horizontal external metal corrugated oil conservator for transformers. Background Technology

[0002] Traditional transformers use horizontal external metal corrugated oil conservators. These conservators utilize an internal stainless steel core that expands and contracts horizontally within the conservator cylinder to accommodate changes in the volume of the insulating oil inside the transformer, thus achieving oil storage. A certain gap exists between the outer contour of the core's cross-section and the inner contour of the conservator cylinder to ensure the core can freely expand and contract within the conservator cylinder.

[0003] Because the core is made of thin sheet metal through an expansion process, its rigidity is very poor. Its direction is difficult to control during expansion and contraction, necessitating the addition of a guiding structure. Furthermore, when the amount of insulating oil in the oil conservator is low, the core's own weight exceeds the buoyancy of the oil, causing the core to bend downwards, with its edge contacting the bottom of the conservator cylinder. During expansion and contraction, the core rubs against the bottom of the conservator cylinder. When the amount of insulating oil is high, the core's own weight is less than the buoyancy of the oil, causing the core to bend upwards, with its edge contacting the top of the conservator cylinder. During expansion and contraction, the core's edge rubs against the top of the conservator cylinder. This friction can lead to core jamming and potentially leakage due to core wear, causing the oil conservator to fail. Therefore, a structure is necessary to isolate the core from the conservator cylinder.

[0004] Therefore, traditional horizontal external corrugated metal oil tanks use a roller structure on the core to isolate the core from the tank body and provide guidance. Typically, dozens of small rollers are arranged at the bottom and top of the core, providing multi-point contact to distribute the force. For example... Figures 1-5 As shown, the guiding structure of a traditional horizontal external corrugated metal oil tank core consists of a horizontal external corrugated metal oil tank cylinder 1, a horizontal external corrugated metal oil tank core 2, and guide rollers 3. The guide rollers 3 are welded to the horizontal external corrugated metal oil tank core 2. Multiple guide rollers 3 form a plane that fits against the inner surface of the horizontal external corrugated metal oil tank cylinder 1, restricting the core's movement along direction A or B (i.e., the radial direction of the horizontal external corrugated metal oil tank core 2) and preventing direct contact between the horizontal external corrugated metal oil tank cylinder 1 and the horizontal external corrugated metal oil tank core 2, thus avoiding jamming or wear. Simultaneously, the roller direction of the guide rollers 3 is the same as the extension / retraction direction of the horizontal external corrugated metal oil tank core 2 (direction C or D in the diagram), serving to guide the horizontal external corrugated metal oil tank core 2.

[0005] Due to the difficulty in controlling manufacturing errors, it is usually difficult to achieve simultaneous contact between multiple guide rollers 3 and the horizontal external oil corrugated metal conservator cylinder 1. In extreme cases, only one guide roller 3 may be in contact with the cylinder 1, resulting in the force on the single guide roller 3 exceeding the design value. This leads to accelerated wear and even breakage of the guide roller 3 due to the excessive force. Besides the inability to isolate the horizontal external oil corrugated metal conservator core 2 from the cylinder 1, causing frictional leakage and conservator failure, the broken debris may also endanger the safety of the transformer. Furthermore, the unstable guidance and poor reliability of the existing guide structure have always been persistent problems for horizontal external oil corrugated metal conservators.

[0006] In recent years, with the development of my country's power transmission and transformation industry, transformer capacity has increased, and the size of related oil conservators has also become larger. Consequently, the self-weight and buoyancy of the core of horizontal external corrugated metal oil conservators have also increased. The traditional guiding structure for the core of horizontal external corrugated metal oil conservators has gradually shown its obsolescence and inadequacy. The development of a more rational guiding structure for the core of horizontal external corrugated metal oil conservators has become a necessity for the oil conservator industry. Utility Model Content

[0007] In view of the above-mentioned problems of traditional guide structures, the purpose of this utility model is to provide a guide structure for the core of a horizontal external oil corrugated metal oil conservator for transformers.

[0008] The objective of this utility model is achieved through the following technical solution:

[0009] This utility model includes a T-shaped guide rail, roller guide shoes, and sliding guide shoes. The T-shaped horizontal side of the T-shaped guide rail is connected to the cylinder of a horizontal external corrugated metal oil storage tank. The vertical end face and both sides of the T-shaped guide rail are guide surfaces. The roller guide shoes and sliding guide shoes are both installed on the core of the horizontal external corrugated metal oil storage tank. The roller guide shoe includes a rolling guide shoe frame, a vertical guide wheel, and a horizontal guide wheel. The rolling guide shoe frame is connected to the core of the horizontal external corrugated metal oil storage tank. The rolling guide shoe frame rotates... A vertical guide wheel is movably installed, and the vertical guide wheel makes rolling contact with the guide surface of the vertical side end face of the T-shaped structure. On the left and right sides below the vertical guide wheel, there are transverse guide wheels rotatably mounted on the rolling guide shoe frame. The transverse guide wheels on both sides make rolling contact with the guide surfaces of the two sides of the vertical side of the T-shaped structure, respectively. The sliding guide shoe includes a sliding guide shoe frame and a guide shoe block. The sliding guide shoe frame is connected to the core of the horizontal external oil corrugated metal oil storage tank. The sliding guide shoe frame is equipped with guide surfaces that make sliding contact with the guide surfaces of the two sides of the vertical side of the T-shaped structure.

[0010] Wherein: the roller guide shoes are arranged at the bottom and top of the core of the horizontal external oil corrugated metal oil storage tank, the sliding guide shoes are arranged on the left and right sides of the core of the horizontal external oil corrugated metal oil storage tank, and T-shaped guide rails are arranged on the cylinder of the horizontal external oil corrugated metal oil storage tank at the positions corresponding to the roller guide shoes and the sliding guide shoes.

[0011] The rolling guide shoe frame is L-shaped. One side of the L-shape is connected to the core of the horizontal external oil corrugated metal oil tank. An installation plate is provided on the other side of the L-shape. The vertical guide wheel is rotatably installed on the installation plate. A notch is opened on the other side of the L-shape below the vertical guide wheel. The horizontal guide wheels on both sides are located below the other side of the L-shape and on both sides of the notch.

[0012] The notch is located in the middle of the other side of the L-shape. The mounting plate is fixed to or integrally formed on the other side of the L-shape on one side of the notch. The transverse guide wheels on both sides are symmetrically located on both sides of the notch.

[0013] The sliding guide shoe frame is shaped like a "Π", with its horizontal side connected to the core of the horizontal external oil corrugated metal oil storage tank. The guide shoe block is located between the two vertical sides and is shaped like a "U". The vertical side of the T-shaped guide rail is inserted through the "U"-shaped opening.

[0014] The advantages and positive effects of this utility model are as follows:

[0015] This invention simplifies the core guiding structure of the horizontal external metal corrugated oil tank, improves guiding reliability, ensures smoother operation, and extends service life. Specifically:

[0016] 1. Simplified structure: This utility model uses guide shoes and guide rails to guide the core and isolate the core from the oil tank cylinder; the number of kinematic pairs used is reduced from dozens to a few, which greatly simplifies the core guiding structure of the horizontal external metal corrugated oil tank.

[0017] 2. Reliable structure: This utility model adopts a structure of guide shoes and T-shaped guide rails, which can withstand large positive and lateral loads and fully meet the operation requirements of the core of the horizontal external oil corrugated metal oil tank.

[0018] 3. Smooth Operation: This utility model adopts a structure of guide shoes combined with T-shaped guide rails. The T-shaped guide rails are machined from metal profiles, with high straightness and low surface roughness, resulting in strong guiding ability. The guide shoes include two types: roller guide shoes and sliding guide shoes, with very low resistance coefficients. Compared with the roller core guiding structure of the traditional horizontal external metal corrugated oil tank, the guiding structure of this utility model has lower running resistance and stronger guiding ability, making the core run more smoothly.

[0019] 4. Extended lifespan: This utility model adopts a structure of guide shoes combined with T-shaped guide rails. Due to its lower running resistance and more reliable structure, it has a longer lifespan compared with the traditional roller structure, thereby extending the service life of the entire oil tank. Attached Figure Description

[0020] Figure 1 A schematic diagram of the internal structure of a traditional horizontal external corrugated metal oil tank and its guide structure;

[0021] Figure 2 for Figure 1 The left view;

[0022] Figure 3 for Figure 1 A magnified view of a section at point E in the middle;

[0023] Figure 4 for Figure 2 A magnified view of a section at point F in the middle;

[0024] Figure 5 for Figure 2 A magnified view of a section at point G in the middle;

[0025] Figure 6 A schematic diagram of the internal structure of a horizontal external metal corrugated oil tank with this installation guide structure installed.

[0026] Figure 7 for Figure 6 The left view;

[0027] Figure 8 for Figure 7 A magnified view of a section at point H in the middle;

[0028] Figure 9 for Figure 7 A magnified view of a section at point I;

[0029] Figure 10 for Figure 6 A magnified view of a section at point J;

[0030] Figure 11 This is a cross-sectional schematic diagram of the T-shaped guide rail of this utility model;

[0031] Figure 12 This is a front view of the structure of the roller guide shoe of this utility model;

[0032] Figure 13 for Figure 12 The left view;

[0033] Figure 14 This is a schematic diagram of the structure of the sliding guide shoe of this utility model;

[0034] Wherein: 1 is the cylinder of the horizontal externally corrugated metal oil storage tank, 2 is the core of the horizontal externally corrugated metal oil storage tank, 3 is the guide roller, 4 is the T-shaped guide rail, 5 is the roller guide shoe, 6 is the sliding guide shoe, 7 is the rolling guide shoe frame, 8 is the vertical guide wheel, 9 is the sliding guide shoe frame, 10 is the guide shoe block, 11 is the guide surface, 12 is the horizontal guide wheel, 13 is the mounting plate, and 14 is the notch. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings.

[0036] like Figures 6-12 As shown, this utility model includes a T-shaped guide rail 4, roller guide shoes 5, and sliding guide shoes 6. The T-shaped horizontal side of the T-shaped guide rail 4 is connected to the cylindrical body 1 of the horizontal external oil corrugated metal storage tank. The end face and two sides of the T-shaped vertical side of the T-shaped guide rail 4 are guide surfaces 11. The roller guide shoes 5 and sliding guide shoes 6 are both installed on the core body 2 of the horizontal external oil corrugated metal storage tank. The roller guide shoe 5 includes a rolling guide shoe frame 7, a vertical guide wheel 8, and a horizontal guide wheel 12. The rolling guide shoe frame 7 is connected to the core body 2 of the horizontal external oil corrugated metal storage tank. A vertical guide wheel 8 is rotatably mounted, and the vertical guide wheel 8 rolls in contact with the guide surface 11 of the vertical side end face of the T-shaped structure. On the left and right sides below the vertical guide wheel 8, there are horizontal guide wheels 12 rotatably mounted on the rolling guide shoe frame 7. The horizontal guide wheels 12 on both sides roll in contact with the guide surfaces 11 on the two sides of the vertical side of the T-shaped structure, respectively. The sliding guide shoe 6 includes a sliding guide shoe frame 9 and a guide shoe block 10. The sliding guide shoe frame 9 is connected to the core body 2 of the horizontal external oil corrugated metal oil storage tank. The sliding guide shoe frame 9 is equipped with guide surfaces 11 that slide in contact with the two sides of the vertical side of the T-shaped structure.

[0037] like Figure 6 , Figure 7 , Figure 9 and Figure 11 As shown, the T-shaped guide rail 4 in this embodiment is a finished T-shaped guide rail made of metal (such as stainless steel), and the guide surface 11 is precision machined (surface roughness is 3.2). The T-shaped horizontal edge of the T-shaped guide rail 4 is installed on the inner wall of the horizontal external oil corrugated metal oil storage tank cylinder 1 by welding or screwing. The length direction of the T-shaped guide rail 4 is parallel to the extension and retraction direction of the horizontal external oil corrugated metal oil storage tank core 2 (i.e., Figure 6 The CD direction is the same, and different numbers of T-shaped guide rails 4 are arranged according to different load requirements.

[0038] In this embodiment, both the cylindrical body 1 and the core body 2 of the horizontal corrugated metal oil storage tank have circular end faces. Four T-shaped guide rails 4 are evenly arranged on the top, bottom, and left and right sides of the cylindrical body 1. Two roller guide shoes 5 and two sliding guide shoes 6 are also present. The two roller guide shoes 5 are located at the bottom and top of the core body 2, bearing the main gravity or buoyancy load and providing primary guidance. The two sliding guide shoes 6 are located on the left and right sides of the core body 2, bearing secondary torsional loads and providing auxiliary guidance. These two types of guide shoes, roller guide shoes 5 and sliding guide shoes 6, cooperate with the T-shaped guide rails 4 to restrict the movement of the core body 2 along the horizontal corrugated metal oil storage tank. Figure 6 The movement is indicated by either A (radially upward) or B (radially downward) of the horizontal external oil corrugated metal conservator cylinder 1 and the horizontal external oil corrugated metal conservator core 2. The roller guide shoe 5 and the sliding guide shoe 6 can move along the T-shaped guide rail 4, guiding the horizontal external oil corrugated metal conservator core 2.

[0039] like Figures 6-8 , Figure 10 and Figures 12-13 As shown, the rolling guide shoe 7 in this embodiment is L-shaped. One side of the L-shape is screwed or welded to the core 2 of the horizontal external oil corrugated metal storage tank. A notch 14 is opened in the middle of the other side of the L-shape. A mounting plate 13 is fixed or integrally formed on the other side of the L-shape on one side of the notch 14. The mounting plate 13 is perpendicular to the two sides of the L-shape. The vertical guide wheel 8 is rotatably mounted on the mounting plate 13. The horizontal guide wheels 12 on both sides are located below the other side of the L-shape and are symmetrically located on both sides of the notch 14. When the roller guide shoe 5 cooperates with the T-shaped guide rail 4, the vertical side of the T-shaped guide rail 4 is located inside the notch 14, and the horizontal guide wheels 12 on both sides are located on both sides of the vertical side of the T-shaped guide rail. The roller guide shoe 5 can achieve two-way limiting, so that the core 2 of the horizontal external oil corrugated metal storage tank can only move along the direction of core extension (i.e., Figure 6 The movement is in the CD direction. In this embodiment, the rolling guide shoe frame 7 is a metal bracket, which can be made of stainless steel; the vertical guide wheel 8 and the horizontal guide wheel 12 are non-metallic guide wheels, which can be made of nylon.

[0040] like Figure 6 , Figure 7 , Figure 9 and Figure 14As shown, in this embodiment, the sliding guide shoe bracket 9 is shaped like a "Π". Its horizontal side is connected to the core body 2 of the horizontal external oil corrugated metal storage tank by screws or welding. The guide shoe block 10 is positioned between the two vertical sides and is shaped like a "U". The vertical side of the T-shaped guide rail 4 is inserted through the "U"-shaped opening. In this embodiment, the sliding guide shoe bracket 9 is a metal support, which can be made of stainless steel; the guide shoe block 10 is a non-metallic slider, which can be made of nylon and has low friction and high wear resistance. The sliding guide shoe 6 can achieve limiting in two directions, ensuring that the core body 2 of the horizontal external oil corrugated metal storage tank can only move along the direction of core extension (i.e.,...). Figure 6 (In the CD direction) movement.

[0041] This invention optimizes the core guiding structure of the traditional horizontal external corrugated metal oil tank by using a guide shoe and guide rail structure instead of the traditional multi-roller structure. This makes the core guiding structure of the horizontal external corrugated metal oil tank simpler, more reliable, and smoother, thus extending the service life of the oil tank.

Claims

1. A core guide structure for a horizontal external oil corrugated metal conservator for transformers, characterized in that: The system includes a T-shaped guide rail (4), roller guide shoes (5), and sliding guide shoes (6). The T-shaped horizontal edge of the T-shaped guide rail (4) is connected to the cylinder (1) of the horizontal external oil corrugated metal storage tank. The vertical end face and both sides of the T-shaped guide rail (4) are guide surfaces (11). The roller guide shoes (5) and sliding guide shoes (6) are both installed on the core (2) of the horizontal external oil corrugated metal storage tank. The roller guide shoe (5) includes a rolling guide shoe frame (7), a vertical guide wheel (8), and a horizontal guide wheel (12). The rolling guide shoe frame (7) is connected to the core (2) of the horizontal external oil corrugated metal storage tank. The roller guide shoe frame (7) is rotatably mounted on the roller guide shoe frame (7). The vertical guide wheel (8) is equipped with a rolling guide wheel (8) that makes rolling contact with the guide surface (11) of the vertical side of the T-shaped structure. The left and right sides below the vertical guide wheel (8) are provided with transverse guide wheels (12) that are rotatably mounted on the rolling guide shoe frame (7). The transverse guide wheels (12) on both sides make rolling contact with the guide surfaces (11) of the two sides of the vertical side of the T-shaped structure. The sliding guide shoe (6) includes a sliding guide shoe frame (9) and a guide shoe block (10). The sliding guide shoe frame (9) is connected to the core (2) of the horizontal external oil corrugated metal oil storage tank. The sliding guide shoe frame (9) is equipped with guide surfaces (11) that make sliding contact with the two sides of the vertical side of the T-shaped structure.

2. The core guiding structure of the horizontal external oil corrugated metal conservator for transformers according to claim 1, characterized in that: The roller guide shoes (5) are arranged at the bottom and top of the horizontal external oil corrugated metal storage tank core (2), and the sliding guide shoes (6) are arranged on the left and right sides of the horizontal external oil corrugated metal storage tank core (2). T-shaped guide rails (4) are arranged on the horizontal external oil corrugated metal storage tank cylinder (1) at the positions corresponding to the roller guide shoes (5) and the sliding guide shoes (6).

3. The core guiding structure of the horizontal external oil corrugated metal conservator for transformers according to claim 1, characterized in that: The rolling guide shoe frame (7) is L-shaped. One side of the L-shape is connected to the core (2) of the horizontal external oil corrugated metal storage tank. The other side of the L-shape is provided with a mounting plate (13). The vertical guide wheel (8) is rotatably mounted on the mounting plate (13). The other side of the L-shape below the vertical guide wheel (8) is provided with a notch (14). The horizontal guide wheels (12) on both sides are located below the other side of the L-shape and on both sides of the notch (14).

4. The core guiding structure of the horizontal external oil corrugated metal conservator for transformers according to claim 3, characterized in that: The notch (14) is located in the middle of the other side of the L-shape. The mounting plate (13) is fixed to or integrally formed on the other side of the L-shape on one side of the notch (14). The transverse guide wheels (12) on both sides are symmetrically located on both sides of the notch (14).

5. The core guiding structure of the horizontal external oil corrugated metal conservator for transformers according to claim 1, characterized in that: The sliding guide shoe frame (9) is in the shape of "Π", and its horizontal side is connected to the core body (2) of the horizontal external oil corrugated metal oil storage tank. The guide shoe block (10) is set between the two vertical sides. The guide shoe block (10) is in the shape of "U". The vertical side of the T-shaped guide rail (4) is inserted through the "U" shaped opening.

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