Leakage testing tool for transformer oil tank shell

Abstract

The utility model provides a leakage testing tool for a transformer oil tank shell. The leakage testing tool comprises a gear lever, a pull rod, a leakage testing disc and a positioning piece, the blocking rod is of a gravity eccentric structure in the length direction. One end of the pull rod is rotationally connected to the middle of the stop rod in the length direction; the leakage testing disc is slidably connected to the length direction of the pull rod in a sleeved mode, the open end of the leakage testing disc faces the blocking rod, and the positioning piece is used for controlling the leakage testing disc to slide and be positioned in the length direction of the pull rod. The leakage testing tool for the transformer oil tank shell is simple and convenient to operate, and the leakage testing efficiency of the oil tank shell is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of leakage testing tools, in particular to a leakage testing tool for a transformer oil tank shell. Background Art

[0002] Oil-immersed transformers are usually used for voltage transformation above 10KV. In order to enhance insulation and cooling conditions, oil is used as the main insulation means of the transformer, and oil is used as the cooling medium. The iron core and winding are immersed in a sealed oil tank filled with insulating oil.

[0003] For transformer oil tank shells, including new energy transformer shells such as Meibian shells and Huabian shells, the traditional sealed oil tank leak test method requires people to crawl inside to fix the threaded rods, and also requires manual screwing outside. It is very inconvenient for two people to work together, and it is time-consuming and labor-intensive. Therefore, a simple and convenient operation and improved

[0004] In view of this, the applicant filed this application after studying the existing technology. Utility Model Content

[0005] The utility model provides a transformer oil tank shell leak testing tool, aiming to improve at least one of the above technical problems.

[0006] In order to solve the above technical problems, the utility model provides a transformer oil tank casing leak test tool, including a gear rod, a pull rod, a leak test disk, and a positioning piece; the gear rod presents a gravity eccentric structure along the length direction; one end of the pull rod is rotatably connected to the middle part of the gear rod in the length direction; the leak test disk is slidably sleeved on the length direction of the pull rod, and the open end of the leak test disk faces the gear rod, and the positioning piece is used to control the sliding and positioning of the leak test disk in the length direction of the pull rod.

[0007] In an optional embodiment, it also includes a rotating pin, a connecting block protrudes from the middle of the gear lever to the side, a first connecting hole is provided on the connecting block, and a second connecting hole is provided at the end of the pull rod. The rotating pin passes through the first connecting hole and the second connecting hole so that one end of the pull rod is rotatably connected to the gear lever.

[0008] In an optional embodiment, the end of the pull rod is provided with two spaced-apart and parallel fixed blocks, the fixed block is provided with a second connecting hole, the connecting block is embedded between the two fixed blocks, and the rotating pin passes through the first connecting hole and the second connecting hole so that one end of the pull rod is rotatably connected to the gear lever.

[0009] In an optional embodiment, the leak testing disc and the pull rod are in smooth contact.

[0010] In an optional embodiment, a sealing ring is further included, and the sealing ring is arranged at the contact position between the leak test disk and the pull rod.

[0011] In an optional embodiment, the positioning member is a tightening nut, and the end of the pull rod away from the shift rod is provided with a threaded portion adapted to the tightening nut, and the tightening nut is connected to the leak test disk via an extension structure.

[0012] In an optional embodiment, the extension structure includes a sleeve, the sleeve is sleeved outside the pull rod, and the inner hole diameter of the sleeve is larger than the outer diameter of the pull rod.

[0013] In an optional embodiment, the gravity eccentric structure of the gear lever along the length direction is a weight-reducing hole provided on one side of the gear lever.

[0014] In an optional embodiment, the middle protrusion of the shift lever is hinged to the end of the pull rod to form a T-shaped structure, and the shift lever can be relatively rotated to an angle that is substantially parallel to the pull rod.

[0015] In an optional embodiment, the shift lever and the pull rod are movably hinged by means of a pin and a cotter pin.

[0016] By adopting the above technical solution, the utility model can achieve the following technical effects:

[0017] The middle part of the lever is hinged to the end of the pull rod, and one side of the lever is heavier, so that it can rotate forward to an angle roughly parallel to the pull rod under the action of gravity to form a strip structure, and can rotate reversely to an angle perpendicular to the pull rod under the action of gravity to form a T-shaped structure. During installation, the lever is adjusted to an angle parallel to the pull rod, and then extended into the fixing hole of the oil tank shell, so that the lever rotates to an angle perpendicular to the pull rod under the action of gravity to form a T-shaped structure and is stuck on the other side of the hole. The leak test plate slides along the pull rod under the action of the positioning piece to a state of squeezing the oil tank shell for leak test; during disassembly, the leak test plate slides away from the oil tank shell, and then rotates 180 degrees around the pull rod axis. The center of gravity of the lever is on the upper side and falls with gravity. The lever is adjusted to an angle parallel to the pull rod and then removed. The transformer oil tank shell leak test tool is simple and convenient to operate, which greatly improves the leak test efficiency of the oil tank shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a transformer oil tank shell leak test tool;

[0020] Figure 2 It is a structural schematic diagram of the transformer oil tank shell leakage test tool in the first working state.

[0021] Figure 3 It is a structural schematic diagram of the transformer oil tank shell leakage test tool in the second working state.

[0022] Figure 4 It is a structural schematic diagram of the transformer oil tank shell leakage test tool in the third working state.

[0023] Figure 5 It is a structural schematic diagram of the transformer oil tank shell leakage test tool in the fourth working state.

[0024] Markings in the figure: 1-gear lever, 2-pull rod, 3-leak test disc, 4-positioning piece, 5-rotation pin, 6-tightening nut, 7-sleeve, 8-weight reduction hole, 9-open pin. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the implementation mode of the utility model clearer, the technical scheme in the implementation mode of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation mode of the utility model. Obviously, the described implementation mode is a part of the implementation mode of the utility model, not all of the implementation modes. Based on the implementation mode in the utility model, all other implementation modes obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the implementation mode of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected implementation mode of the utility model. Based on the implementation mode in the utility model, all other implementation modes obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] Depend on Figures 1 to 5 As shown, an embodiment of the utility model provides a transformer oil tank casing leak test tool, including a shift lever 1, a pull rod 2, a leak test disc 3, and a positioning member 4.

[0027] The gear lever 1 has an eccentric gravity structure along the length direction, with one side being heavier and the other side being lighter. In this embodiment, the eccentric gravity structure of the gear lever 1 along the length direction is that a weight-reducing hole 8 is provided on one side of the gear lever. Figure 2 As shown, the weight-reducing hole 8 in this embodiment is a hollow hole, so as to keep the outer shape of the gear lever in a rectangular strip shape, which is convenient for resisting on the fuel tank housing.

[0028] One end of the pull rod 2 is rotatably connected to the middle part of the gear lever 1 in the length direction. In this embodiment, the middle protrusion of the gear lever 1 is hinged to the end of the pull rod to form a T-shaped structure, and the gear lever 1 can be relatively rotated to an angle roughly parallel to the pull rod 2.

[0029] The leak test disc 3 is slidably sleeved on the length direction of the pull rod 1 , and the open end of the leak test disc 3 faces the gear lever 1 . The positioning member 4 is used to control the sliding and positioning of the leak test disc 3 in the length direction of the pull rod 2 .

[0030] The middle part of the lever 1 is hinged to the end of the pull rod 3. One side of the lever 1 is heavier, so that it can rotate forward under the action of gravity to an angle roughly parallel to the pull rod 2 to form a strip structure, and can rotate backward under the action of gravity to an angle perpendicular to the pull rod 2 to form a T-shaped structure. When installing, please refer to Figure 2 , the leak test tool is in the first working state, the leak test plate 3 moves along the pull rod 2 away from the gear lever 1, please refer to Figure 3 , in the second working state of the leak test tool, adjust the lever 1 to an angle roughly parallel to the pull rod 2, and then extend it into the fixing hole of the fuel tank housing; please refer to Figure 4 In the third working state, the leak test fixture rotates the lever 1 to a perpendicular angle to the pull rod 2 under the action of gravity to form a T-shaped structure so as to be stuck on the other side of the fixing hole of the fuel tank shell. The leak test plate 3 slides along the pull rod 2 under the action of the positioning member 4 to the state of squeezing the fuel tank shell to perform a leak test; please refer to Figure 5 When the leak test tool is in the fourth working state, the leak test disc 3 slides away from the oil tank shell and then rotates 180 degrees around the axis of the pull rod 2. The center of gravity of the lever 1 falls down with gravity after it is on the upper side. The lever 1 is adjusted to an angle parallel to the pull rod 2, and then it is taken out. The transformer oil tank shell leak test tool is simple and convenient to operate, which greatly improves the leak test efficiency of the oil tank shell.

[0031] In an optional embodiment of the utility model, a connecting block protrudes from the middle of the gear lever 1 to the side, the connecting block is provided with a first connecting hole, the end of the pull rod 2 is provided with a second connecting hole, and the rotating pin 5 passes through the first connecting hole and the second connecting hole so that one end of the pull rod 2 is rotatably connected to the gear lever 1. Through the protruding connecting block, the gear lever 1 can be relatively rotated to an angle substantially parallel to the pull rod 2.

[0032] Furthermore, the end of the pull rod 2 is provided with two spaced and parallel fixing blocks, the fixing blocks are provided with second connection holes, the connection block is embedded between the two fixing blocks, and the rotation pin 5 passes through the first connection hole and the second connection hole so that one end of the pull rod 2 is rotatably connected to the shift rod 1. This structure can ensure that the shift rod 1 can be relatively rotated to an angle substantially parallel to the pull rod 2.

[0033] like Figures 1 to 5 As shown, based on the above embodiment, in an optional embodiment of the utility model, the leak test disc 3 and the pull rod 2 are in smooth contact, so as to ensure the sealing performance of the leak test disc 3, and further, a sealing ring is included, which is arranged at the contact position between the leak test disc 3 and the pull rod 2 and is used to seal the gap between the leak test disc 3 and the pull rod 2. Among them, the contact surface between the sealing ring and the pull rod 2 is a smooth rod, which facilitates the sealing ring to slide on the pull rod 2 with the leak test disc 3.

[0034] There are many structures for realizing the positioning member, such as a snap-fit ​​structure, a rack structure, etc. In this embodiment, the positioning member 4 is a tightening nut 6, and the end of the pull rod 2 away from the gear lever 1 is provided with a threaded portion adapted to the tightening nut 6, and the tightening nut 6 is connected to the leak test disc 3 through an extension structure.

[0035] The extension structure can be of various types, such as a plurality of parallel connecting strips, etc., which only need to play a fixed connection role and can drive the leak test plate to slide on the pull rod.

[0036] Please refer to Figures 2~5 In an optional embodiment, the extension structure includes a sleeve 7, the sleeve 7 is sleeved outside the pull rod 2, and the inner hole diameter of the sleeve 7 is larger than the outer diameter of the pull rod 2.

[0037] Furthermore, in an optional embodiment, a rotating structure is provided between the sleeve 7 and the leak test disk 3, for example, an inner ring and an outer ring are rotationally adapted to each other, so that when the tightening nut 6 rotates on the threaded portion, the leak test disk 3 does not need to rotate accordingly, but only needs to slide and stop on the pull rod with the tightening nut 6.

[0038] Please refer to Figures 2~5 The gravity eccentric structure of the gear lever 2 along the length direction is that a weight-reducing hole is provided on one side of the gear lever 1. The protrusion in the middle of the gear lever 2 is hinged to the end of the pull rod 3 to form a T-shaped structure, and the gear lever can be relatively rotated to an angle roughly parallel to the pull rod 3. The gear lever 1 and the pull rod 2 are movably hinged by a pin and a cotter pin 3. In this embodiment, it is a rotating pin 5 and a cotter pin 3.

[0039] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A transformer oil tank shell leak test tool, characterized in that: It comprises a shift lever (1), a pull rod (2), a leak test plate (3), and a positioning member (4); The gear rod (1) presents a gravity eccentric structure along the length direction; one end of the pull rod (2) is rotatably connected to the middle part of the gear rod (1) in the length direction; the leak test disk (3) is slidably sleeved on the pull rod (2) in the length direction, and the open end of the leak test disk (3) faces the gear rod (1); the positioning member (4) is used to control the sliding and positioning of the leak test disk (3) in the length direction of the pull rod (2).

2. The transformer oil tank shell leak test tool according to claim 1, characterized in that: It also includes a rotating pin (5), a connecting block protruding from the middle of the gear lever (1) to the side, a first connecting hole being provided on the connecting block, and a second connecting hole being provided at the end of the pull rod (2), the rotating pin passing through the first connecting hole and the second connecting hole so that one end of the pull rod (2) is rotatably connected to the gear lever (1).

3. The transformer oil tank housing leak test tool according to claim 2, characterized in that: The end of the pull rod (2) is provided with two spaced-apart and parallel fixing blocks, the fixing blocks are provided with second connecting holes, and the connecting block is embedded between the two fixing blocks.

4. The transformer oil tank shell leak test tool according to claim 1, characterized in that: The leak test disc (3) and the pull rod (2) are in smooth contact with each other.

5. The transformer oil tank shell leak test tool according to claim 4, characterized in that: It also comprises a sealing ring, which is arranged at the contact position between the leak test disc (3) and the pull rod (2).

6. The transformer oil tank housing leak test tool according to claim 4 or 5, characterized in that: The positioning member (4) is a tightening nut (6), and the end of the pull rod (2) away from the shift rod (1) is provided with a threaded portion adapted to the tightening nut, and the tightening nut (6) is connected to the leak test disc (3) via an extension structure.

7. The transformer oil tank shell leak test tool according to claim 6, characterized in that: The extension structure comprises a sleeve (7), the sleeve (7) being sleeved outside the pull rod (2), and the inner diameter of the sleeve (7) being larger than the outer diameter of the pull rod (2).

8. The transformer oil tank shell leak test tool according to claim 1, characterized in that: The gravity eccentric structure of the shift rod (1) along the length direction is that a weight reduction hole is provided on one side of the shift rod (1).

9. The transformer oil tank shell leak test tool according to claim 2, characterized in that: The protrusion in the middle of the shift rod (1) is hinged to the end of the pull rod (2), and the two can form a T-shaped structure, and the shift rod (1) can be relatively rotated to an angle that is substantially parallel to the pull rod (2).

10. The transformer oil tank shell leak test tool according to claim 3, characterized in that: The shift rod (1) and the pull rod (2) are movably hinged by means of a pin and a cotter pin (9).

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