Transport and fixation method of reactor core cake

Abstract

This invention belongs to the field of reactor technology and relates to a method for transporting and fixing reactor core discs. It involves designing and manufacturing a transport and fixing fixture for the reactor core disc, achieving center positioning and top, bottom, and circumference fixation. The fixture includes an upper cross-shaped fixture, a lower cross-shaped fixture, a center positioning fixture, and a tie rod. The lower cross-shaped fixture, with the side welded to the positioning disc facing upwards, is placed on a leveled surface. The center positioning fixture is then placed on the positioning disc. The core disc passes through the center positioning fixture and the positioning disc and is placed on the lower cross-shaped fixture. The upper cross-shaped fixture is placed on top of the core disc, with the positioning disc facing downwards. The tie rod is assembled and the bolts at both ends are tightened. Lifting lugs are then securely installed on the upper end of the tie rod. This invention features a simple structure, ease of use, and robust fixing, improving the safety of reactor core disc transport.

Description

Technical Field

[0001] This invention belongs to the field of reactor technology, specifically relating to a method for transporting and fixing reactor core discs. Background Technology

[0002] The core of a shunt reactor is assembled from a core disc and a yoke. The reactor core disc often needs to be transported separately. The reactor core disc is made up of several stacked electrical silicon steel sheets. Due to the special structure of the core disc, there are no fixed stress points on it, making it difficult to reliably fix during transportation. Furthermore, the core disc has high requirements for levelness, making it difficult to maintain stability during transport and increasing the risk of safety and quality accidents. Currently, there are no dedicated tooling or fixing methods specifically for transporting reactor core discs. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention provides a fixing method that can reliably fix the reactor core disc and facilitate long-distance transportation. The technical solution adopted by this invention is as follows:

[0004] The method for transporting and securing reactor core discs includes the following steps:

[0005] Step 1: Design and manufacture a transport and fixing fixture for the reactor core disc to achieve center positioning and top, bottom, and circumferential fixation of the core disc. The transport and fixing fixture for the reactor core disc includes an upper cross-shaped fixture, a lower cross-shaped fixture, a center positioning fixture, and a pull screw. The upper and lower cross-shaped fixtures have a first through hole at their center, and the ends of the upper and lower cross-shaped fixtures have second through holes. The center positioning fixture is placed between the upper and lower cross-shaped fixtures, and a third through hole is opened at the center of its circumference. The diameters of the first, second, and third through holes match the diameter of the pull screw. The outer diameter of the center positioning fixture is smaller than the inner diameter of the core disc, and the height of the center positioning fixture is smaller than the height of the core disc. The outer diameter of the upper and lower cross-shaped fixtures is larger than the outer diameter of the core disc. The pull screw has external threads at both ends. After passing through the first, second, and third through holes, the pull screw is fastened at both ends with bolts. A lifting lug is fixedly installed at the upper end of the pull rod, and an internal thread hole that mates with the external threads at both ends of the pull rod is provided at the center of the lifting lug. The upper cross-shaped tooling and the lower cross-shaped tooling are respectively composed of one channel steel I and two channel steel II welded together. The two channel steel II are respectively fixedly welded to both ends of the channel steel I. A compensation plate is fixedly welded at the center intersection of the upper cross-shaped tooling and the lower cross-shaped tooling. The compensation plate and the channel steel II are located on the same side of the channel steel I and are flush with each other. A positioning disc is fixedly welded on the side of the channel steel I opposite to the compensation plate. A first through hole is opened at the center of the positioning disc. A second through hole is opened at the center of the channel steel II at each of the four ends of the upper cross-shaped tooling and the lower cross-shaped tooling.

[0006] Step 2: Place the lower cross-shaped fixture with the locating disc welded on it on the leveled ground, with the side facing up, and place the center locating fixture on the locating disc.

[0007] Step 3: The iron core disc is placed on the lower cross-shaped fixture by passing through the central positioning fixture and the positioning disc. The upper cross-shaped fixture is placed on top of the iron core disc, with the positioning disc of the upper cross-shaped fixture facing down.

[0008] Step 4: Assemble the pull rod and tighten the bolts at both ends of the pull rod.

[0009] Step 5: Secure the lifting lug to the upper end of the tie rod.

[0010] Preferably, channel steel I and channel steel II are made of carbon steel.

[0011] Preferably, the material of the center positioning tool is laminated wood.

[0012] Preferably, the outer diameter of the center positioning fixture is equal to the diameter of the positioning disk.

[0013] Preferably, the iron core disc is tightly wrapped with plastic sheeting and stretch film, and the length of the pull screw extending out of the lower cross-shaped tooling should not exceed 30mm.

[0014] The beneficial effects of this invention are:

[0015] This invention is applicable to the fixing of reactor core cakes. It features simple structure, convenient use, convenient storage, low cost, and firm fixing, and can significantly improve the safety of reactor core cake transportation. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings required for the specific embodiments will be briefly introduced below.

[0017] Figure 1 This is a cross-sectional view of the reactor core cake transport and fixing fixture according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the upper cross-shaped tooling and the lower cross-shaped tooling in an embodiment of the present invention;

[0019] In the diagram, 1 is the iron core disc, 2 is the upper cross-shaped fixture, 3 is the lower cross-shaped fixture, 4 is the center positioning fixture, 5 is the tie rod, 6 is the lifting lug, 7 is the compensation plate, 8 is the positioning disc, 9 is channel steel I, and 10 is channel steel II. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, and not all embodiments.

[0021] The method for transporting and securing reactor core discs includes the following steps:

[0022] Step 1: Design and fabricate a transport and fixing fixture for the reactor core cake to achieve center positioning and top, bottom, and circumferential fixation of the core cake. The transport and fixing fixture includes an upper cross-shaped fixture 2, a lower cross-shaped fixture 3, a center positioning fixture 4, and a tie rod 5. Figure 1 The figure shown is a cross-sectional view of the reactor core cake transportation and fixing method according to an embodiment of the present invention.

[0023] like Figure 2The diagram shows the structural schematics of the upper and lower cross-shaped fixtures according to an embodiment of the present invention. The upper cross-shaped fixture 2 and the lower cross-shaped fixture 3 are each welded together from a section of channel steel I9 and two sections of channel steel II10. The two sections of channel steel II10 are fixedly welded to both ends of channel steel I9, and the length of channel steel I9 is ​​greater than the length of channel steel II10. A compensation plate 7 is fixedly welded at the intersection of the centers of the upper cross-shaped fixture 2 and the lower cross-shaped fixture 3. The compensation plate 7 and channel steel II10 are located on the same side of channel steel I9 and are flush with each other. This ensures that the lower cross-shaped fixture 3 can be placed stably on the ground and reliably contact the ground. Simultaneously, the compensation plate 7 also increases the mechanical strength of the upper cross-shaped fixture 2 and the lower cross-shaped fixture 3. A positioning disc 8 is fixedly welded to the side of channel steel I9 opposite to the compensation plate 7. A first through hole is opened in the center of the positioning disc 8. Second through holes are opened at the center of the four ends of channel steel II10 of the upper cross-shaped tooling 2 and the lower cross-shaped tooling 3. The diameters of the first and second through holes match the diameter of the pull rod 5. M30 external threads are provided at both ends of the pull rod 5. After the pull rod 5 passes through the first and second through holes, it is tightened with bolts. The threads of the pull rod 5 are blackened to prevent rust. A lifting lug 6 is fixedly installed at the upper end of the pull rod 5. The lifting lug 6 is provided with an internal thread hole that matches the M30 external threads at both ends of the pull rod 5. The lifting lug 6 can be fixedly installed by simply rotating and screwing it onto the upper end of the pull rod 5. The lifting lug 6 facilitates the hoisting and fixing of the iron core disc. The channel steel I9 and channel steel II10 are made of carbon steel. The outer diameter of the cross-shaped tooling after welding is larger than the outer diameter of the iron core disc. By manufacturing upper cross-shaped fixture 2 and lower cross-shaped fixture 3 with larger diameters, the requirements of all iron core discs with diameters smaller than the outer diameters of the upper cross-shaped fixture 2 and lower cross-shaped fixture 3 are met, thereby achieving the standardization of the transportation and fixing method.

[0024] The central positioning fixture 4 is a cylindrical structure made of laminated wood. Its outer diameter is smaller than the inner diameter of the iron core disc, and its outer diameter is equal to the diameter of the positioning disc 8. The height of the central positioning fixture 4 is slightly less than the height of the iron core disc. A third through hole is formed at the center of the circumference of the central positioning fixture 4. The diameter of this third through hole matches the diameter of the pull screw 5, which passes through the third through hole. The central positioning fixture 4 is used to fix the iron core disc and prevent it from wobbling back and forth.

[0025] Taking a reactor of model BKS-10000 / 35 as an example, the outer diameter of the core disc is Φ1298mm, the inner diameter is Φ288mm, and the height is 180mm. Based on the dimensions and weight of this reactor core disc, the width, thickness, and outer diameter of the circumscribed circle of the upper cross-shaped fixture 2 and the lower cross-shaped fixture 3 are determined to be 200mm, 20mm, and Φ1500mm, respectively. The length of the pull rod 5 is determined to be 350mm, and the thread length at both ends is 80mm. The outer diameter of the center positioning fixture 4 is Φ260mm, and the diameter of the third through hole of the center positioning fixture 4 is Φ30mm.

[0026] Step 2: Place the lower cross-shaped fixture 3 with the side welded with the positioning disc 8 facing upwards on the leveled ground, and place the center positioning fixture 4 on the positioning disc 8.

[0027] Step 3: Wrap the iron core disc tightly with plastic sheeting and stretch film, slowly pass it through the center positioning fixture 4 and positioning disc 8 and place it on the lower cross-shaped fixture 3. Then place the upper cross-shaped fixture 2 on the top of the iron core disc, with the positioning disc 8 of the upper cross-shaped fixture 2 facing down.

[0028] Step 4: Assemble the pull rod 5 and tighten the bolts at both ends of the pull rod 5. The length of the pull rod 5 extending out of the lower cross-shaped tooling should not exceed 30mm to avoid affecting the stability of the lower part.

[0029] Step 5: Finally, the lifting lug 6 is fastened to the upper end of the tie rod 5 for overhead crane lifting.

[0030] At this point, the iron core disc is positioned between the upper cross-shaped fixture 2 and the lower cross-shaped fixture 3, and inside the four tie rods 5. One tie rod 5 passes through the upper cross-shaped fixture 2, the lower cross-shaped fixture 3, and the center positioning fixture 4, thus achieving stable and reliable fixing of the iron core disc and ensuring its safety during transportation.

[0031] The method for transporting and fixing the reactor core disc according to an embodiment of the present invention is as follows:

[0032] Finally, it should be noted that the above embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit them. The scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention.

Claims

1. A method for transporting and fixing reactor core discs, characterized in that, Includes the following steps: Step 1: Design and manufacture a reactor core cake transport and fixing fixture to achieve the center positioning and top, bottom and circumference fixing of the core cake. The reactor core cake transport and fixing fixture includes an upper cross-shaped fixture (2), a lower cross-shaped fixture (3), a center positioning fixture (4) and a pull screw (5). The upper cross-shaped fixture (2) and the lower cross-shaped fixture (3) have a first through hole in their center, and the upper cross-shaped fixture (2) and the lower cross-shaped fixture (3) have a second through hole at their ends. 2) A center positioning fixture (4) is placed between the upper cross-shaped fixture (2) and the lower cross-shaped fixture (3). A third through hole is opened at the center of the circumference of the center positioning fixture (4). The diameters of the first through hole, the second through hole and the third through hole are matched with the diameter of the pull screw (5). The outer diameter of the center positioning fixture (4) is smaller than the inner diameter of the iron core disc. The height of the center positioning fixture (4) is smaller than the height of the iron core disc. The outer diameters of the upper cross-shaped fixture (2) and the lower cross-shaped fixture (3) are larger than the outer diameter of the iron core disc. The two ends of the pull screw (5) are respectively provided with The external thread is provided, and the pull rod (5) passes through the first through hole, the second through hole and the third through hole respectively, and is fastened at both ends by bolts; the upper end of the pull rod (5) is fixedly installed with a lifting lug (6), and the center of the lifting lug (6) is provided with an internal thread hole that matches the external thread at both ends of the pull rod (5); the upper cross-shaped tooling (2) and the lower cross-shaped tooling (3) are respectively composed of a section of channel steel I (9) and two sections of channel steel II (10) welded together, and the two sections of channel steel II (10) are respectively fixedly welded to both ends of channel steel I (9). A compensation plate (7) is fixedly welded at the intersection of the center of the upper cross-shaped tooling (2) and the lower cross-shaped tooling (3). The compensation plate (7) and the channel steel II (10) are located on the same side of the channel steel I (9) and are flush with each other. A positioning disc (8) is fixedly welded on the side of the channel steel I (9) opposite to the compensation plate (7). A first through hole is opened in the center of the positioning disc (8). Second through holes are opened at the center of the channel steel II (10) at the four ends of the upper cross-shaped tooling (2) and the lower cross-shaped tooling (3). Step 2: Place the lower cross-shaped fixture (3) with the locating disc (8) welded on it facing upwards on the leveled ground, and place the center locating fixture (4) on the locating disc (8). Step 3: The iron core disc passes through the center positioning fixture (4) and the positioning disc (8) and is placed on the lower cross-shaped fixture (3). The upper cross-shaped fixture (2) is placed on the upper part of the iron core disc, with the positioning disc (8) of the upper cross-shaped fixture (2) facing down. Step 4: Assemble the pull rod (5) and tighten the bolts at both ends of the pull rod (5); Step 5: Secure the lifting lug (6) to the upper end of the pull rod (5).

2. The method for transporting and fixing reactor core discs according to claim 1, characterized in that, The material of channel steel I (9) and channel steel II (10) is carbon steel.

3. The method for transporting and fixing reactor core discs according to claim 2, characterized in that, The material of the center positioning fixture (4) is laminated wood.

4. The method for transporting and fixing reactor core discs according to claim 3, characterized in that, The outer diameter of the center positioning fixture (4) is equal to the diameter of the positioning disk (8).

5. The method for transporting and fixing reactor core discs according to claim 1, characterized in that, The iron core disc is tightly wrapped with plastic sheeting and stretch film, and the length of the pull screw (5) extending out of the lower cross-shaped tooling shall not exceed 30mm.

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