Method for installing transformer in limited space

Abstract

The invention discloses a method for installing a transformer in a limited space. The method comprises the following steps: processing an angle steel support frame and a sizing block for a rail; the transformer is transported to a parking position; after the transformer is jacked up through a jacking jack, a rail is laid at the bottom of the transformer, an angle steel supporting frame is arranged below the rail, a sleeper for supporting is arranged between the angle steel supporting frame and the ground, a sizing block for the rail is placed on the rail, and the transformer is placed on the rail; a horizontal jack is used for pushing the transformer to move along the track until the transformer moves to the position over the transformer base equipment foundation; the rail is removed after the transformer is jacked up; and the transformer is placed on the transformer base equipment foundation. According to the installation method of the transformer in the limited space, installation can be completed without hoisting equipment, external traction force such as a winch is not needed, and the position of the transformer is relatively moved through the rail and the transformer; various used accessories can be reused, so that the installation cost is low; the operation is simple and the application prospect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment installation, and in particular to a method for installing a transformer in a confined space, which has low requirements for transport equipment, good safety and low cost. Background Art

[0002] 110kV substation is very important in the power grid. The application of electric energy is "balanced" through five links: "power generation" → "power transmission" → "power transformation" → "power distribution" → "power consumption". At present, since electric energy cannot be directly stored in large quantities, the application of electric energy from "generation" to "use" is "balanced and synchronously completed". Substations play an important role in the application of electric energy. Transformer losses account for about 40% of the power loss in power transmission and distribution, and have great energy-saving potential. In order to accelerate the promotion and application of high-efficiency and energy-saving transformers, improve the efficiency of energy resource utilization, and promote green, low-carbon and high-quality development. Transformers are basic equipment for power transmission and distribution in substations. They are widely used in industries, agriculture, transportation, urban communities and other fields. The installation of transformers is also important in the engineering field, especially in confined spaces where cranes cannot be used for lifting, which is also a major test for the skills of installers.

[0003] CN 202311272640.3 discloses a method for transporting large transformers in a confined space. Although it can realize the transportation of large transformers in a confined space, it still relies on external equipment such as external winches. Sometimes, there is no facility to install winches for operations in confined spaces, and there are still certain limitations. At the same time, the laying of the transportation channel and the installation of sleeper frames on the floor slabs also have a certain destructive effect on the floor slabs.

[0004] Therefore, it is of great practical significance to develop a method for installing transformers in confined spaces that has low requirements for transfer equipment, good safety and low cost. Summary of the invention

[0005] Due to the above-mentioned defects in the prior art, the present invention provides a method for installing a transformer in a confined space which has low requirements for transfer equipment, good safety and low cost, thereby overcoming the defects of the existing method for installing a transformer in a confined space, which has high requirements for transfer equipment, strong limitations, high cost and certain possibility of damage to other auxiliary parts.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A method for installing a transformer in a confined space comprises the following steps:

[0008] (1) According to the elevation of the parking position of the transport vehicle and the top elevation of the equipment foundation of the transformer base, select the transport vehicle and sleepers to ensure that the bottom elevation of the transformer on the transport vehicle is slightly higher than the top elevation of the equipment foundation after the vehicle is in place;

[0009] (2) Processing the angle steel support frame and the rail washer, the rail washer includes a support plate and a clamping plate, there are two clamping plates arranged in parallel on the support plate, the distance between the two clamping plates is greater than the width of the rail, the rail washer is used to prevent the transformer from deflecting and also reduce friction;

[0010] (3) Use a transport vehicle to transport the transformer to the parking location and secure the transport vehicle;

[0011] (4) After lifting the transformer with a lifting jack, lay the track at the bottom of the transformer. The track is arranged toward the direction of the transformer base equipment foundation and the top elevation of the track is higher than the top elevation of the equipment foundation. An angle steel support frame is arranged under the track and a supporting sleeper is provided between the angle steel support frame and the ground. A track shim is placed on the track and the track shim is located directly under the transformer. The transformer is slowly placed on the track;

[0012] (5) Use a horizontal jack to push the transformer along the track until the transformer moves to the top of the transformer base equipment foundation;

[0013] (6) Use a lifting jack to lift the transformer and remove the track;

[0014] (7) Gently place the transformer on the transformer base equipment foundation and fix it on the transformer base equipment foundation.

[0015] The method for installing a transformer in a confined space of the present invention is specifically a method for moving the transformer into position on a rail using a jack. The step sequence is reasonably designed, and the installation can be completed without lifting equipment, and no external traction force such as a winch is required. The position of the transformer is relatively moved by the rail and the transformer itself. The tooling can be repeatedly used, and the method has low cost, simple operation, high operability, and good application prospects.

[0016] As the preferred technical solution:

[0017] In the above-mentioned method for installing a transformer in a confined space, when the transport vehicle is loaded with the transformer, it is necessary to ensure that the direction of the transformer after parking on site is consistent with the direction of the transformer after installation.

[0018] In the above-mentioned method for installing a transformer in a confined space, the support plate is L-shaped, and includes a bottom plate and a vertical limit plate connected to each other, and the clamping and fixing plate is fixedly connected to the bottom plate.

[0019] In the above-mentioned method for installing a transformer in a confined space, fixing the transport vehicle specifically refers to sealing the front and rear wheels of the transport vehicle with angle wood so that the transport vehicle cannot move forward or backward.

[0020] In the above-mentioned method for installing a transformer in a confined space, the bundling and sealing facilities of the transformer are removed before lifting the transformer.

[0021] In the above-mentioned method for installing a transformer in a confined space, there are a plurality of lifting jacks and the plurality of lifting jacks are evenly arranged at the bottom of the transformer.

[0022] In the above-mentioned method for installing a transformer in a confined space, the horizontal jack cooperates with the track locking device to push the transformer;

[0023] The number of the horizontal jacks is the same as the number of the tracks and each track is provided with a horizontal jack, and the push-pull displacement speeds of all the horizontal jacks are kept consistent.

[0024] In the above-mentioned method for installing a transformer in a confined space, if the track length cannot be laid directly above the foundation of the transformer base equipment, the rear section of the track is removed and installed in front of the track and then the transformer is pushed, and the operation is repeated until the transformer is moved directly above the foundation of the transformer base equipment.

[0025] In the above-mentioned method for installing a transformer in a confined space, after the transformer reaches directly above the foundation of the transformer base equipment, the transformer is calibrated according to the installation accuracy of the transformer.

[0026] The above technical solution is only a feasible technical solution of the present invention, and the protection scope of the present invention is not limited thereto. Those skilled in the art can reasonably adjust the specific design according to actual needs.

[0027] The above invention has the following advantages or beneficial effects:

[0028] (1) The method for installing a transformer in a confined space of the present invention can complete the installation without lifting equipment, and does not require external traction such as a winch. The installation can be completed in a confined space by moving the transformer position relative to the track and the transformer itself, and the installation effect is good;

[0029] (2) In the method for installing a transformer in a confined space of the present invention, various auxiliary parts used can be reused, and the installation cost is low;

[0030] (3) The method for installing a transformer in a confined space of the present invention is easy to operate and has high operability. It has been applied in the construction process of large-scale transformer installation projects in multiple substations with good application effect and good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and emphasis is placed on illustrating the subject matter of the present invention.

[0032] Figure 1 It is a schematic diagram of the parking position elevation of the transport vehicle and the top elevation of the transformer base equipment foundation;

[0033] Figure 2 This is the main view of the angle steel support frame;

[0034] Figure 3 and Figure 4 They are Figure 2 Sectional views 1-1 and 2-2;

[0035] Figure 5 This is the front view of the track shim;

[0036] Figure 6 and Figure 7 They are Figure 5 Section views 3-3 and 4-4;

[0037] Figures 8 to 12 They are the state change diagrams of the operation in step (5) (horizontally pushing the transformer);

[0038] Fig.13 is a state diagram of step (6);

[0039] Fig.14 is a state diagram of step (7);

[0040] Among them, 1 is the transformer base equipment foundation, 2 is the transport vehicle parking road surface, 3 is the transport vehicle, 4 is the transformer, 5 is the angle steel support frame, 6 is the rail pad, 61 is the bottom plate, 62 is the vertical limit plate, 63 is the clamping fixing plate, 7 is the lifting jack, 8 is the rail, 9 is the sleeper, 10 is the horizontal jack, and 11 is the rail locking device. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0042] Example 1

[0043] A method for installing a transformer in a confined space comprises the following steps:

[0044] (1) First measure the elevation of the parking position of the transport vehicle and the equipment foundation elevation of the transformer base (such as Figure 1As shown in the figure, select appropriate transport vehicles and reasonable transport sleepers according to the elevation difference, and ensure that after the vehicle is in place, the bottom elevation of the transformer is slightly higher than the top elevation of the equipment foundation. When loading and unloading the transformer, ensure that the direction of the transformer after parking on site is consistent with the direction of the transformer after installation:

[0045] (2) Make Figures 2 to 4 The angle steel support frame 5 shown, the size of the support frame is determined according to the size of the transformer and can be adjusted randomly;

[0046] Make as Figures 5 to 7 The track shim 6 shown in the figure is used to prevent the transformer from deflecting and also reduce friction. The track shim 6 includes a support plate and a clamping plate 63. The support plate is L-shaped and includes a bottom plate 61 and a vertical limit plate 62 connected to each other. There are two clamping plates 63 that are fixedly connected to the bottom plate 61 at a parallel interval. The interval between the two clamping plates 63 is greater than the width of the track 8.

[0047] (3) Use the transport vehicle 3 to transport the transformer 4 to the designated location on site, seal the front and rear wheels of the vehicle with angle wood to prevent it from moving forward and backward, and remove the transformer bundling and sealing facilities;

[0048] (4) Use 4 sets of lifting jacks 7 (specifically, thin split hydraulic jacks KET-RCS-502) to lift the transformer by 30 mm, then lay tracks 8 at the bottom of the transformer 4 and set up angle steel support frames 5 and sleepers 9 on both sides of the vehicle. When setting up the sleeper pile, place sleepers 9 at the bottom and pre-made angle steel support frames 5 and tracks 8 at the top. The top elevation of the track should be 30 to 50 mm higher than the equipment foundation elevation. Before the lifting jack releases pressure, ensure that the sleeper pile is reinforced and stable, and then slowly drop the transformer 4 onto the laid track 8. Figure 8 As shown;

[0049] The parameters of the hydraulic jack KET-RCS-502 are as follows: load capacity: 50T, working stroke: 60mm, body height: 122mm, working pressure: 70Mpa;

[0050] (5) Two sets of horizontal jacks 10 (specifically, large-stroke split hydraulic jacks BD-JRR-30T) and track locking devices 11 are used together. During the movement of the transformer, the push-pull displacement speed of the horizontal jacks 10 on the two tracks 8 should be uniform. When the jack stroke is reached, move the horizontal jacks 10 and the track locking devices 11 forward and continue the previous pushing and moving action. When the track is insufficient, the previous track 8 can be removed and moved to the required position until the transformer 4 is moved to the specified installation position. Its status is as follows: Figures 8 to 12 As shown;

[0051] The parameters of the hydraulic jack BD-JRR-30T are as follows: load capacity: 30T, working stroke: 800mm, body height: 970mm, working pressure: 70Mpa;

[0052] (6) The transformer 4 is calibrated according to its installation accuracy. After the calibration is completed, four sets of lifting jacks 7 (specifically, thin-type split hydraulic jacks KET-RCS-502) are used to lift the transformer 4 by 30 mm, and then the rails 8 are removed. Fig.13 As shown;

[0053] (7) Slowly remove the lifting jack 7, drop the transformer 4 onto the transformer base equipment foundation 1, and then fix it according to the requirements of the drawing. The installation is completed. Fig.14 shown.

[0054] It has been verified that the installation method of the transformer in a confined space of the present invention can complete the installation without lifting equipment, and does not require external traction such as a winch. The installation can be completed in the confined space by relatively moving the transformer position between the track and the transformer itself, and the installation effect is good; the various auxiliary parts used can be reused, and the installation cost is low; the operation is simple and the operability is high. It has been applied in the construction process of large-scale transformer installation projects in multiple substations, with good application effect and good application prospects.

[0055] Those skilled in the art should understand that those skilled in the art can implement variations by combining the prior art and the above embodiments, which will not be described in detail here. Such variations do not affect the essential content of the present invention, and will not be described in detail here.

[0056] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A method for installing a transformer in a confined space, characterized in that: The following steps are involved: (1) According to the elevation of the parking position of the transport vehicle and the top elevation of the equipment foundation of the transformer base, select the transport vehicle and sleepers to ensure that the bottom elevation of the transformer on the transport vehicle is slightly higher than the top elevation of the equipment foundation after the vehicle is in place; (2) Processing the angle steel support frame and the rail washer, wherein the rail washer includes a support plate and a clamping plate, wherein there are two clamping plates arranged in parallel on the support plate with a spacing therebetween, and the spacing between the two clamping plates is greater than the width of the rail; (3) Use a transport vehicle to transport the transformer to the parking location and secure the transport vehicle; (4) After lifting the transformer with a lifting jack, lay the track at the bottom of the transformer. The track is arranged toward the direction of the transformer base equipment foundation and the top elevation of the track is higher than the top elevation of the equipment foundation. An angle steel support frame is arranged under the track and a supporting sleeper is provided between the angle steel support frame and the ground. A track shim is placed on the track and the track shim is located directly under the transformer. The transformer is slowly placed on the track; (5) Use a horizontal jack to push the transformer along the track until the transformer moves to the top of the transformer base equipment foundation; (6) Use a lifting jack to lift the transformer and remove the track; (7) Gently place the transformer on the transformer base equipment foundation and fix it on the transformer base equipment foundation.

2. A method for installing a transformer in a confined space according to claim 1, characterized in that: When the transport vehicle is loading the transformer, it must be ensured that the direction of the transformer after parking on site is consistent with the direction of the transformer after installation.

3. The method for installing a transformer in a confined space according to claim 1, characterized in that: The support plate is L-shaped and comprises a bottom plate and a vertical limit plate connected to each other, and the clamping and fixing plate is fixedly connected to the bottom plate.

4. The method for installing a transformer in a confined space according to claim 1, characterized in that: The said fixing of the transport vehicle specifically refers to sealing the front and rear wheels of the transport vehicle by using angle wood.

5. The method for installing a transformer in a confined space according to claim 1, characterized in that: Remove the transformer's bundling and sealing facilities before lifting the transformer.

6. The method for installing a transformer in a confined space according to claim 1, characterized in that: There are a plurality of lifting jacks, and the plurality of lifting jacks are evenly arranged at the bottom of the transformer.

7. The method for installing a transformer in a confined space according to claim 1, characterized in that: The horizontal jack cooperates with the track locking device to push the transformer; The number of the horizontal jacks is the same as the number of the tracks and each track is provided with a horizontal jack, and the push-pull displacement speeds of all the horizontal jacks are kept consistent.

8. The method for installing a transformer in a confined space according to claim 1, characterized in that: If the track is too long to be laid directly above the transformer base equipment foundation, remove the rear section of the track and install it in front of the track and then push the transformer. Repeat this operation until the transformer is moved directly above the transformer base equipment foundation.

9. The method for installing a transformer in a confined space according to claim 1, characterized in that: After the transformer reaches the top of the transformer base equipment foundation, the transformer is calibrated according to the installation accuracy of the transformer.

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