Loading and unloading method for large transformer in narrow space

Abstract

The invention discloses a loading and unloading method for a large transformer in a narrow space. Transfer guide rails are laid on a preset transfer road, it is ensured that the guide rails can bear and guide transfer of the transformer, the transformer on a flat car is lifted through a hydraulic jack, and space is provided for installation of sliding rails. A sliding rail is installed between the flat car and the transformer, one side of the transformer is pushed through a pushing jack, and the transformer is pushed to the position over the sleeper. And the transformer is lifted through the hydraulic jack and then withdrawn from the sliding rail, and the transformer is made to descend to the sleeper. And the transformer is repeatedly lifted and descended through cooperation of the hydraulic jacks and the sleepers, and the multiple layers of sleepers below the transformer are sequentially extracted till the transformer is descended to the transfer guide rail. And the transformer is transferred to a mounting position through traction of the winch. Loading and unloading operation of the transformer can be achieved in the narrow space, the problem that a traditional loading and unloading method cannot enter the field in the narrow space is solved, operation is easy and convenient, and the transferring difficulty and risk are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and particularly to a method for loading and unloading large transformers in narrow spaces. Background Art

[0002] With the continuous enlargement, intensification, and intelligentization of the power grid architecture, and the continuous promotion of clean energy by the country, the power grid structure with transformers as the core in the power system faces projects such as new construction, renovation, expansion, and reconstruction. In these engineering projects, the loading and unloading operations of large transformers and other equipment are crucial links. Traditional loading and unloading methods usually rely on large lifting equipment, but in the construction sites of narrow spaces, large lifting equipment often cannot enter the site, resulting in great difficulties in the loading and unloading operations of large equipment.

[0003] Currently, the loading and unloading operations of transformers in narrow spaces mostly use the rolling bar method for equipment transfer. Although the loading and unloading difficulty is relatively small, the transfer difficulty and risk are relatively high. Therefore, it is necessary to develop a method for loading and unloading large transformers in narrow spaces that is safe and convenient. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related technologies to some extent.

[0005] To this end, an embodiment of the present invention provides a method for loading and unloading large transformers in narrow spaces.

[0006] The method for loading and unloading large transformers in narrow spaces according to the embodiment of the present invention includes the following steps:

[0007] S1. Lay transfer guide rails on a preset transfer road, and the transfer guide rails are used to carry and guide the transfer of the transformer;

[0008] S2. Park the flatbed truck carrying the transformer on one side of the transfer guide rails, and set the flatbed truck parallel to the transfer guide rails;

[0009] S3. Lay multiple layers of sleepers on the transfer guide rails, and the height of the sleepers is the same as the height of the flatbed truck;

[0010] S4. Use a hydraulic jack to lift the transformer on the flatbed truck;

[0011] S5. Install a slide rail between the flatbed truck and the transformer, and the slide rail is set perpendicular to the transfer guide rails;

[0012] S6. Use a hydraulic jack to lower the transformer onto the slide rail;

[0013] S7. Install a push jack on the slide rail, and use the push jack to push one side of the transformer along the length direction of the slide rail to push the transformer directly above the sleepers;

[0014] S8. Use a hydraulic jack to lift the transformer, then remove it from the slide rail and let the transformer drop onto the sleepers.

[0015] S9. Use the hydraulic jack in cooperation with the sleepers to repeatedly lift and lower the transformer, and sequentially extract multiple layers of sleepers under the transformer until the transformer is lowered onto the transfer guide rail.

[0016] S10. Use a winch to tow the transformer to the installation position.

[0017] In some embodiments, in S1, the number of transfer guide rails is two, and the two transfer guide rails are arranged at intervals.

[0018] In some embodiments, in S3, each layer of sleepers includes multiple sleepers arranged in parallel and at intervals, and adjacent two layers of sleepers are arranged perpendicular to each other.

[0019] In some embodiments, in S4, the bottom of the hydraulic jack abuts against the flatbed truck, and the top of the hydraulic jack abuts against the jacking support point on the side of the transformer box body.

[0020] In some embodiments, in S5, the number of slide rails is multiple, and the multiple slide rails are arranged at intervals along the length direction of the transfer guide rail.

[0021] In some embodiments, in S7, a jacking jack is arranged on each slide rail.

[0022] In some embodiments, in S7, a push plate is arranged between the jacking jack and the transformer, and the push plate is arranged parallel to the side wall of the transformer box body.

[0023] In some embodiments, in S10, the transformer is towed by a winch for transfer.

[0024] The method for loading and unloading a large transformer in a narrow space according to the embodiments of the present invention can realize the loading and unloading operation of the transformer in a narrow space by laying transfer guide rails and sleepers, and solves the problem that the traditional loading and unloading method cannot enter the site in a narrow space. This method uses a hydraulic jack and a jacking jack for lifting and jacking the transformer, which is simple to operate and reduces the transfer difficulty and risk. This method can quickly tow the transformer to the installation position by a winch, improving the transfer efficiency. This method lifts and lowers the transformer multiple times during the transfer process to ensure that the transformer will not be damaged during the transfer process. Description of the Drawings

[0025] Figure 1 is the operation schematic diagram of the method for loading and unloading a large transformer in a narrow space according to the embodiments of the present invention

[0026] Figure 2It is an operation schematic diagram of the method for loading and unloading large transformers in narrow spaces according to an embodiment of the present invention

[0027] Figure 3 It is an operation schematic diagram of the method for loading and unloading large transformers in narrow spaces according to an embodiment of the present invention

[0028] Figure 4 It is an operation schematic diagram of the method for loading and unloading large transformers in narrow spaces according to an embodiment of the present invention

[0029] Reference numerals:

[0030] 1. Transfer guide rail; 2. Transformer; 3. Flatbed truck; 4. Sleeper; 5. Hydraulic jack; 6. Slide rail; 7. Pushing jack; 8. Pushing plate Detailed implementation manners

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention

[0032] With the continuous enlargement, intensification, and intelligentization of the power grid architecture, and the continuous promotion of clean energy by the country, the power grid structure with transformers as the core in the power system faces frequent new construction, reconstruction, expansion, and rebuilding projects. In these engineering projects, the loading and unloading operations of large transformers and other equipment are crucial links. Traditional loading and unloading methods usually rely on large lifting equipment. However, in the construction sites with narrow spaces, large lifting equipment often cannot enter the site, resulting in great difficulties in the loading and unloading operations of large equipment

[0033] At present, the rolling bar method is mostly used for equipment transfer in the loading and unloading operations of transformers in narrow spaces. Although the loading and unloading difficulty is relatively small, the transfer difficulty and risk are relatively high. Therefore, it is necessary to develop a method for loading and unloading large transformers that is suitable for narrow spaces, safe, and convenient

[0034] As Figures 1 to 4 shown, the method for loading and unloading the large transformer 2 in narrow spaces according to the embodiment of the present invention includes the following steps

[0035] S1. Lay a transfer guide rail 1 on the preset transfer road, and the transfer guide rail 1 is used to carry and guide the transfer of the transformer 2

[0036] S2. Park the flatbed truck 3 carrying the transformer 2 on one side of the transfer guide rail 1, and make the flatbed truck 3 parallel to the transfer guide rail 1

[0037] S3. Lay multiple layers of sleepers 4 on the transfer guide rail 1, and the height of the sleepers 4 is the same as the height of the flatbed truck 3

[0038] S4. Use the hydraulic jack 5 to lift the transformer 2 on the flatbed truck 3;

[0039] S5. Install the slide rail 6 between the flatbed truck 3 and the transformer 2, and the slide rail 6 is arranged perpendicular to the transfer guide rail 1;

[0040] S6. Use the hydraulic jack 5 to lower the transformer 2 onto the slide rail 6;

[0041] S7. Install the pushing jack 7 on the slide rail 6, and use the pushing jack 7 to push one side of the transformer 2 along the length direction of the slide rail 6 to push the transformer 2 directly above the sleeper 4;

[0042] S8. Use the hydraulic jack 5 to lift the transformer 2 and then remove the slide rail 6, and lower the transformer 2 onto the sleeper 4;

[0043] S9. Repeatedly lift and lower the transformer 2 by using the hydraulic jack 5 in cooperation with the sleeper 4, and sequentially extract multiple layers of sleepers 4 under the transformer 2 until the transformer 2 is lowered onto the transfer guide rail 1;

[0044] S10. Through the traction of the winch, transfer the transformer 2 to the installation position.

[0045] For the method of loading and unloading a large transformer 2 in a narrow space in the embodiment of the present invention, a transfer guide rail 1 is laid on the preset transfer road to ensure that the guide rail can carry and guide the transfer of the transformer 2. The flatbed truck 3 carrying the transformer 2 is parked on one side of the transfer guide rail 1, and the flatbed truck 3 is arranged parallel to the transfer guide rail 1. Multiple layers of sleepers 4 are laid on the transfer guide rail 1, and the height of the sleepers 4 is the same as the height of the flatbed truck 3 to provide support for subsequent transfer. Use the hydraulic jack 5 to lift the transformer 2 on the flatbed truck 3 to provide space for installing the slide rail 6. Install the slide rail 6 between the flatbed truck 3 and the transformer 2, and the slide rail 6 is arranged perpendicular to the transfer guide rail 1 for subsequent pushing of the transformer 2. Use the hydraulic jack 5 to lower the transformer 2 onto the slide rail 6 to prepare for the pushing operation. Install the pushing jack 7 on the slide rail 6, and use the pushing jack 7 to push one side of the transformer 2 along the length direction of the slide rail 6 to push the transformer 2 directly above the sleeper 4. Use the hydraulic jack 5 to lift the transformer 2 and then remove the slide rail 6, and lower the transformer 2 onto the sleeper 4. Repeatedly lift and lower the transformer 2 by using the hydraulic jack 5 in cooperation with the sleeper 4, and sequentially extract multiple layers of sleepers 4 under the transformer 2 until the transformer 2 is lowered onto the transfer guide rail 1. Through the traction of the winch, transfer the transformer 2 to the installation position.

[0046] The method for loading and unloading a large transformer 2 in a narrow space according to the embodiments of the present invention can realize the loading and unloading operation of the transformer 2 in a narrow space by laying transfer guide rails 1 and sleepers 4, and solves the problem that the traditional loading and unloading method cannot enter the narrow space. This method uses hydraulic jacks 5 and pushing jacks 7 to lift and push the transformer 2, which is simple to operate and reduces the transfer difficulty and risk. This method can quickly transfer the transformer 2 to the installation position by being towed by a winch, improving the transfer efficiency. This method lifts and lowers the transformer 2 multiple times during the transfer process to ensure that the transformer 2 will not be damaged during the transfer process.

[0047] In some embodiments, in S1, the number of transfer guide rails 1 is two, and the two transfer guide rails 1 are arranged at intervals.

[0048] As Figure 1 shown, the number of transfer guide rails 1 is two, and the two transfer guide rails 1 are arranged at intervals. This arrangement helps to keep the transformer 2 balanced and stable during the transfer process, reducing vibration and shaking during the transfer process. The interval between the two transfer guide rails 1 can be determined according to the size and weight of the transformer 2 to ensure the safety and smoothness of the transfer process.

[0049] Specifically, the two transfer guide rails 1 can be arranged in parallel and in the same direction as the moving direction of the flatbed truck 3. During the transfer process, both sides of the transformer 2 are in contact with the two transfer guide rails 1 respectively, so as to maintain its stability during the transfer process. At the same time, this double-guide rail arrangement can also disperse the weight of the transformer 2, reduce the pressure on a single guide rail, and extend the service life of the guide rail.

[0050] In addition, the interval between the two transfer guide rails 1 can also be adjusted according to the specific site conditions and the transfer requirements of the transformer 2. For example, in some cases, it may be necessary to increase the interval between the guide rails to accommodate a larger transformer 2, or reduce the interval to accommodate a narrower space. In short, the interval arrangement of the two transfer guide rails 1 is a flexible and practical solution that can meet the loading and unloading requirements of the transformer 2 in different scenarios.

[0051] In some embodiments, in S3, each layer of sleepers 4 includes a plurality of sleepers 4 arranged in parallel and at intervals, and the adjacent two layers of sleepers 4 are arranged perpendicular to each other.

[0052] As Figure 2As shown, the vertical cross-laying of adjacent sleepers 4 can form a more stable support structure, improve the overall load-bearing capacity, and ensure the stability of the transformer 2 during transportation. The cross-laid sleepers 4 can evenly distribute the weight of the transformer 2 to more sleepers 4, reduce the pressure on a single sleeper 4, and lower the risk of damage to the sleeper 4. When subjected to external impacts, the vertically cross-laid sleeper 4 structure can better absorb and disperse vibrations, reducing the swaying of the transformer 2 during transportation. In the case of uneven ground, the cross-laid sleepers 4 can better adapt to the undulations of the ground, ensuring the smoothness of the transformer 2 transportation. When adjustment or maintenance is required, the cross-laid sleeper 4 structure allows for easier replacement or repair of the sleepers 4, improving work efficiency.

[0053] In some embodiments, in S4, the bottom of the hydraulic jack 5 abuts against the flatbed truck 3, and the top of the hydraulic jack 5 abuts against the jacking support point on the side of the transformer 2 housing.

[0054] As Figure 3 shown, first, the placement position of the hydraulic jack 5 needs to be determined on the flatbed truck 3. This is usually at the corner or specific support points of the flatbed truck 3 to ensure that the hydraulic jack 5 can stably support the transformer 2. Place the bottom of the hydraulic jack 5 on the flatbed truck 3 and ensure that its contact surface with the flatbed truck 3 is flat and stable. This can prevent the hydraulic jack 5 from tilting or sliding during lifting. The top of the hydraulic jack 5 needs to abut against the jacking support point on the side of the transformer 2 housing. These support points are usually reserved during the design of the transformer 2 for lifting and supporting structures. Ensure that the top of the hydraulic jack 5 is aligned with the support point and the contact surface is flat to avoid damage to the transformer 2.

[0055] Start the hydraulic jack 5 and slowly lift the transformer 2 until there is enough space between the transformer 2 and the flatbed truck 3 for subsequent slide rail 6 installation and pushing operations. During the lifting process, it is necessary to closely monitor the stability of the transformer 2 to ensure a smooth and safe lifting process. After the transformer 2 is lifted to an appropriate height, the hydraulic jack 5 needs to be fixed to prevent it from accidentally descending or moving during transportation. This can be achieved through the locking mechanism of the hydraulic jack 5 itself or other auxiliary fixing devices.

[0056] In some embodiments, in S5, the number of slide rails 6 is multiple, and the multiple slide rails 6 are arranged at intervals along the length direction of the transfer guide rail 1.

[0057] As Figure 4As shown, according to the size and weight of the transformer 2, determine the number of slide rails 6 to be used. Generally, multiple slide rails 6 can disperse the weight of the transformer 2 and improve the stability during transportation. The slide rails 6 should be arranged perpendicular to the transportation guide rail 1, so as to ensure that the transformer 2 can move smoothly along the transportation guide rail 1 during transportation. Multiple slide rails 6 should be arranged at intervals along the length direction of the transportation guide rail 1. The interval between the slide rails 6 should be determined according to the width of the transformer 2 and the width of the transportation guide rail 1 to ensure that the transformer 2 can move smoothly on the slide rails 6 while avoiding interference between the slide rails 6. The slide rails 6 should be firmly fixed between the flatbed truck 3 and the transformer 2 to ensure that the slide rails 6 will not loosen or fall off during transportation. A jack is arranged on each slide rail, which helps to disperse the weight of the transformer during movement, reduces the burden on a single jack, and increases the stability and reliability of the system.

[0058] In some embodiments, in S7, a jack 7 is arranged on each slide rail 6.

[0059] Multiple jacks 7 act simultaneously to push against the transformer 2 to prevent the transformer 2 from tilting during movement on the slide rails 6, which is beneficial to improving safety.

[0060] In some embodiments, in S7, a push plate 8 is arranged between the jack 7 and the transformer 2, and the push plate 8 is arranged parallel to the side wall of the box body of the transformer 2.

[0061] As Figure 4 shown, by arranging the push plate 8 between the jack 7 and the transformer 2, the impact and wear on the direct contact with the box body of the transformer 2 can be reduced, thereby protecting the transformer 2 from damage. The push plate 8 is arranged parallel to the side wall of the box body of the transformer 2, which helps to maintain the stability of the transformer 2 during movement and prevent tilting or swaying during handling.

[0062] In some embodiments, in S10, the transformer 2 is transported by a winch.

[0063] First, the winch needs to be positioned at one end of the transportation path to ensure that it can be firmly fixed on the ground or other stable support structures. One end of the towing rope is fixed to the transformer 2, usually on the lifting lug or specially designed towing point of the transformer 2. Ensure that the connection between the towing rope and the transformer 2 is firm and can withstand the pulling force during transportation. Lay the towing rope from the transformer 2 to the winch, ensuring that there are no obstacles on the transportation path and the towing rope can pass smoothly.

[0064] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0065] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0066] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0068] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0069] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for loading and unloading a large transformer in a narrow space, characterized in that: The following steps are involved: S1. Laying a transfer rail (1) on a preset transfer road, wherein the transfer rail (1) is used to carry and guide the transfer of the transformer (2); S2, parking the flatbed truck (3) carrying the transformer (2) on one side of the transfer rail (1), and placing the flatbed truck (3) parallel to the transfer rail (1); S3, laying multiple layers of sleepers (4) on the transfer guide rail (1), and the height of the sleepers (4) is the same as the height of the flatbed car (3); S4. Lift the transformer (2) on the flatbed truck (3) using a hydraulic jack (5); S5. Install a slide rail (6) between the flatbed vehicle (3) and the transformer (2), wherein the slide rail (6) is arranged perpendicular to the transfer guide rail (1); S6. Use the hydraulic jack (5) to lower the transformer (2) onto the slide rail (6); S7, installing a push jack (7) on the slide rail (6), using the push jack (7) to push one side of the transformer (2) along the length direction of the slide rail (6), and pushing the transformer (2) to the top of the sleeper (4); S8, using the hydraulic jack (5) to lift the transformer (2) and then withdraw it from the slide rail (6), and lower the transformer (2) onto the sleeper (4); S9, repeatedly lifting and lowering the transformer (2) by means of a hydraulic jack (5) in cooperation with the sleepers (4), and sequentially extracting the multiple layers of sleepers (4) below the transformer (2) until the transformer (2) is lowered onto the transfer guide rail (1); S10, using a winch to pull the transformer (2) to the installation location.

2. The method for loading and unloading a large transformer in a narrow space according to claim 1, characterized in that: In S1, the number of transfer rails (1) is two, and the two transfer rails (1) are arranged at an interval.

3. The method for loading and unloading a large transformer in a narrow space according to claim 1, characterized in that: In S3, each layer of sleepers (4) comprises a plurality of sleepers (4) arranged in parallel and at intervals, and two adjacent layers of sleepers (4) are arranged perpendicular to each other.

4. The method for loading and unloading a large transformer in a narrow space according to claim 1, characterized in that: In S4, the bottom of the hydraulic jack (5) is stopped on the flatbed truck (3), and the top of the hydraulic jack (5) is stopped on the lifting support point on the side of the transformer (2) box.

5. The method for loading and unloading a large transformer in a narrow space according to claim 1, characterized in that: In S5, there are multiple slide rails (6), and the multiple slide rails (6) are arranged at intervals along the length direction of the transfer guide rail (1).

6. The method for loading and unloading a large transformer in a narrow space according to claim 5, characterized in that: In S7, a push jack (7) is arranged on each slide rail (6).

7. The method for loading and unloading a large transformer in a narrow space according to claim 6, characterized in that: In S7, a push plate (8) is provided between the push jack (7) and the transformer (2), and the push plate (8) is arranged parallel to the side wall of the box body of the transformer (2).

8. The method for loading and unloading a large transformer in a narrow space according to claim 1, characterized in that: In S10, the transformer (2) is transported by means of a winch.

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