Positioning tool of transformer partition plate supporting device and precision control method of positioning tool

Abstract

The invention discloses a positioning tool of a transformer partition plate supporting device and a precision control method of the positioning tool, and relates to the field of power transformer accessory machining, the positioning tool comprises a screw rod, the transformer partition plate supporting device comprises a supporting disc and a supporting ring arranged on the upper surface of the supporting disc, the supporting ring is of an annular structure, and the screw rod is arranged on the supporting disc. A plurality of threaded holes are formed in the supporting ring, the threaded holes are distributed around the axis of the supporting ring at equal angles, lifting bars are installed on the upper surface of the supporting disc, the lifting bars are distributed around the outer circle of the supporting ring at equal angles, assembling holes are formed in the lifting bars, and the assembling holes and the threaded holes are located in the same horizontal plane. And the screw rods are connected between the corresponding assembly holes and the corresponding threaded holes. According to the positioning tool of the transformer partition plate supporting device, the difficulty brought by assembly and welding of parts and detection of size precision after welding is reduced, and the reworking problem is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power transformer accessory processing, in particular to a positioning tool for a transformer partition plate support device and a precision control method thereof. BACKGROUND

[0002] The riser of a power transformer is a key component for providing installation support for the bushing and adjusting the insulation distance. The partition plate system inside the riser plays a core role in optimizing the electric field distribution, blocking impurities from entering, and guiding oil flow for heat dissipation and fixing components, which is a key component for ensuring the insulation safety and operational stability of the riser. This structure often uses a fixed insulating part and a support device of the riser.

[0003] When installing the insulating part and the support device, a long screw rod needs to be passed through the positioning hole in the insulating part and assembled with the support device and the riser. Due to the large thickness of the insulating part (usually 100-200 mm), it is necessary to ensure that the installation hole of the lifting grapnel is concentric with the threaded hole in the circular support ring. This increases the difficulty of component assembly, welding, and post-welding size precision detection. On-site rework is often performed due to the misalignment of the installation holes.

[0004] Therefore, it is necessary to provide a positioning tool for a transformer partition plate support device and a precision control method thereof to solve the above problems. SUMMARY

[0005] The present application aims to provide a positioning tool for a transformer partition plate support device and a precision control method thereof to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a positioning tool for a transformer partition plate support device, comprising a screw rod, the transformer partition plate support device comprising a support disc and a support ring arranged on the upper surface of the support disc, the support ring being in a circular ring structure, the support ring being provided with threaded holes, the threaded holes being provided in multiple, the multiple threaded holes being distributed at equal angles around the axis of the support ring, the upper surface of the support disc being provided with grapnels, the grapnels also being provided in multiple, the multiple grapnels being distributed at equal angles around the outer circle of the support ring, the grapnels being provided with assembly holes, the assembly holes and the threaded holes being located on the same horizontal plane and corresponding to each other, and the screw rod being connected between the corresponding assembly holes and threaded holes.

[0007] Preferably, one end of the screw rod has a diameter of 15.5 cm, and the other end is an M12 threaded segment, which is fitted into the threaded hole.

[0008] Preferably, the screw rod is assembled by a first screw rod sleeve, a second screw rod sleeve, and a screw rod core, the first screw rod sleeve and the second screw rod sleeve are both in a cylindrical structure, the inner circle of the first screw rod sleeve and the second screw rod sleeve is provided with internal threads, the screw rod core is in a cylindrical structure, and the outer circle of the screw rod core is provided with external threads.

[0009] Preferably, the rubber sealing pad is arranged at both ends of the screw core, and the rubber sealing pad and the inner wall of the first screw sleeve or the second screw sleeve form a hollow cavity.

[0010] The precision control method of the transformer partition plate support device also comprises, First, place the lifting hook on the upper surface of the support disc at a suitable position, then connect it between the corresponding assembly hole and threaded hole using a screw rod, one end of the screw rod is fitted into the threaded hole, the screw rod is fully screwed into the assembly hole, and the gap between the outer ring of the screw rod and the inner ring of the assembly hole is only 0.5mm, at this time, the support ring and the lifting hook are sequentially spot-welded, after welding, the coaxiality of the assembly hole and the threaded hole is rechecked using a tool, and concentric positioning is completed.

[0011] The technical effects and advantages of the present application are: In the present application, the positioning tool of the transformer partition plate support device reduces the difficulty of detecting the size precision of the assembled parts after welding, and reduces the rework problem. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a top view of the transformer partition plate support device of the present application.

[0013] Figure 2 It is a side view of the transformer partition plate support device of the present application.

[0014] Figure 3 It is a sectional view of the transformer partition plate support device of the present application.

[0015] Figure 4 It is a structure schematic diagram of the positioning tool of the transformer partition plate support device of the present application.

[0016] Figure 5 It is a structure schematic diagram of the screw rod in Example 2 of the present application.

[0017] In the figure: 1, support ring; 2, support disc; 3, lifting hook; 4, assembly hole; 5, threaded hole; 6, screw rod; 7, first screw sleeve; 8, second screw sleeve; 9, screw core; 10, rubber sealing pad; 11, hollow cavity. DETAILED DESCRIPTION

[0018] Example 1

[0019] The present application provides a positioning tool for a transformer partition plate support device, which comprises a support disc, a lifting hook, a first screw sleeve, a second screw sleeve, a screw core and a rubber sealing pad. Figures 1-4The positioning tool of the transformer partition plate support device shown in the embodiment comprises a screw rod 6; the transformer partition plate support device comprises a support disc 2 and a support ring 1 arranged on the upper surface of the support disc 2, the support ring 1 is in a circular ring structure, the support ring 1 is provided with a plurality of threaded holes 5, the plurality of threaded holes 5 are distributed at equal angles around the axis of the support ring 1, the upper surface of the support disc 2 is provided with a plurality of hanging ladders 3, the plurality of hanging ladders 3 are distributed at equal angles around the outer circle of the support ring 1, and the support disc 2 and the hanging ladders 3 are connected in the prior art, usually, the hanging ladders 3 are directly placed on the surface of the support disc 2, and manual welding is used, but there is a problem of difficulty in later use after welding.

[0020] The assembly hole 4 is arranged on the hanging ladder 3, the assembly hole 4 and the threaded hole 5 are located in the same horizontal plane and correspond to each other, before the hanging ladder 3 is welded, the hanging ladder 3 is placed on the upper surface of the support disc 2 at a proper position, then the screw rod 6 is connected between the corresponding assembly hole 4 and threaded hole 5, one end of the screw rod 6 has a diameter of 15.5 cm, the other end is an M12 threaded segment, the M12 threaded segment is fitted into the threaded hole 5, the length of the screw rod 6 can be determined according to actual requirements, after the screw rod 6 is installed, the screw rod 6 needs to be completely screwed into the assembly hole 4, the gap between the outer circle of the screw rod 6 and the inner circle of the assembly hole 4 is only 0.5 mm, which meets the use requirements, at this time, the support ring 1 and the hanging ladder 3 are sequentially spot-welded, after welding, the coaxiality of the assembly hole 4 and the threaded hole 5 is rechecked by using a tool, which can ensure that the screw rod 6 is smoothly screwed into the threaded hole 5 for use.

[0021] To sum up, the positioning tool of the transformer partition plate support device provided in the embodiment reduces the difficulty in detection of the assembly, welding and post-welding dimensional accuracy of parts, and reduces the rework problem.

[0022] Embodiment 2

[0023] Reference Figure 5 As shown in the embodiment, the screw rod 6 is assembled by a first screw rod sleeve 7, a second screw rod sleeve 8 and a screw rod core 9, the first screw rod sleeve 7 and the second screw rod sleeve 8 are both in a cylindrical structure, the inner circle of the first screw rod sleeve 7 and the second screw rod sleeve 8 is provided with an internal thread, the screw rod core 9 is in a cylindrical structure, the outer circle of the screw rod core 9 is provided with an external thread, when the second screw rod sleeve 8 or the first screw rod sleeve 7 is rotated, the length of the screw rod 6 can be changed, which is convenient for adjusting the length according to actual requirements, the application range is wide, and different types of screw rods 6 need not to be prepared to adapt to different specifications of welding assembly.

[0024] Further, the screw core 9 is fixedly provided with rubber sealing pads 10 at both ends, and the rubber sealing pads 10 and the inner walls of the first screw sleeve 7 or the second screw sleeve 8 form hollow cavities 11, which are sealed by the rubber sealing pads 10. When the first screw sleeve 7 or the second screw sleeve 8 is rotated, the length of the screw 6 becomes longer, and the hollow cavities 11 are also vacuumized. When the hollow cavities 11 are vacuumized to a certain degree, the first screw sleeve 7 or the second screw sleeve 8 will be difficult to continue to rotate relative to the screw core 9, thereby avoiding the phenomenon that the first screw sleeve 7 or the second screw sleeve 8 is accidentally unscrewed from the end of the screw core 9. The operation is simple, and accidents are not easy to occur. Due to the vacuum resistance, the end of the screw core 9 can be kept at a longer distance in the first screw sleeve 7 or the second screw sleeve 8, thereby ensuring the stability of the screw 6 as a whole.

Claims

1. A positioning fixture for a transformer partition support device, comprising a screw (6), characterized in that: The transformer partition support device includes a support plate (2) and a support ring (1) disposed on the upper surface of the support plate (2). The support ring (1) has a circular ring structure and is provided with threaded holes (5). There are multiple threaded holes (5), which are distributed at equal angles around the axis of the support ring (1). A lifting rod (3) is installed on the upper surface of the support plate (2). There are also multiple lifting rods (3), which are distributed at equal angles around the outer ring of the support ring (1). The lifting rod (3) is provided with an assembly hole (4). The assembly hole (4) and the threaded hole (5) are located on the same horizontal plane and correspond to each other. A screw (6) is connected between the corresponding assembly hole (4) and the threaded hole (5).

2. The positioning fixture for a transformer partition support device according to claim 1, characterized in that: The screw (6) has a diameter of 15.5cm at one end and an M12 threaded section at the other end, which is fitted into the threaded hole (5).

3. The positioning fixture for a transformer partition support device according to claim 1, characterized in that: The screw (6) is assembled from a first screw sleeve (7), a second screw sleeve (8) and a screw core (9). Both the first screw sleeve (7) and the second screw sleeve (8) are cylindrical structures. Both the inner rings of the first screw sleeve (7) and the second screw sleeve (8) are provided with internal threads. The screw core (9) is a cylindrical structure and the outer ring of the screw core (9) is provided with external threads.

4. The positioning fixture for a transformer partition support device according to claim 3, characterized in that: Both ends of the screw core (9) are fixedly provided with rubber sealing gaskets (10), and a hollow cavity (11) is formed between the rubber sealing gaskets (10) and the inner wall of the first screw sleeve (7) or the second screw sleeve (8).

5. A method for precision control of a transformer diaphragm support device, the method comprising the positioning fixture as described in claim 1, characterized in that, The method also includes, First, place the lifting ring (3) at a suitable position on the upper surface of the support plate (2). Then, use the screw (6) to connect between the corresponding assembly hole (4) and threaded hole (5). One end of the screw (6) is fitted into the threaded hole (5) so that the screw (6) is completely screwed into the assembly hole (4). The gap between the outer ring of the screw (6) and the inner ring of the assembly hole (4) is only 0.5mm. At this time, the support ring (1) and the lifting ring (3) are spot welded in sequence. After welding, use tools to re-check the coaxiality of the assembly hole (4) and the threaded hole (5) to complete the concentric positioning.

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