An adjustable installation device and method for a distribution transformer

Abstract

This invention discloses an adjustable installation device and method for a distribution transformer, installed between two transformer base frames for mounting the transformer onto a channel steel crossarm. The device includes: an I-beam, comprising a first flange, a second flange, and a web connecting the first and second flanges; the first flange is connected to the transformer base frame via an installation unit; two limiting plates, slidably disposed on both sides of the upper surface of the second flange along its width; and an adjustment unit connected to the two limiting plates on the web. This solution eliminates the need for repeated manual observation, avoiding multiple lifting and repositioning due to hoisting sway and visual deviation. Furthermore, vertical alignment allows for rapid alignment of the installation holes by pushing the transformer, eliminating the need for forceful prying while the transformer is in contact with the channel steel crossarm, thus avoiding the risk of equipment damage.

Description

Technical Field

[0001] This invention relates to the field of transformer installation technology, and specifically to an adjustable installation device and method for a distribution transformer. Background Technology

[0002] As a key piece of equipment in the power distribution network, the distribution transformer undertakes the core function of converting high-voltage electrical energy into low-voltage electrical energy that users can directly use. Pole-mounted installation is one of the most typical installation methods for distribution transformers, which involves using poles to build a platform to suspend the transformer in the air. It is widely used in urban and rural power distribution networks, rural power grid transformation, and industrial power distribution.

[0003] During the installation of pole-mounted transformers, the traditional construction method usually involves using hoisting equipment to lift the transformer above the channel steel crossarm between poles. Through manual observation and command, the hoisting operation is coordinated to align the mounting holes on the transformer base with the pre-made threaded holes on the channel steel crossarm, and then insert bolts to tighten and complete the installation.

[0004] However, in practice, it was found that after the transformer was hoisted into place, there was a three-dimensional spatial deviation between the mounting hole and the threaded hole. Often, the crane had to lift and adjust the direction multiple times before lowering it again, or construction workers had to stand on the crossarm and use a crowbar to forcibly pry the transformer to adjust its position. This process was repeated until the holes were aligned, which was very manual and had problems such as low efficiency and easy damage to the equipment. At the same time, the hoisting was prone to shaking, and it was necessary to adjust it repeatedly to complete the connection, which seriously affected the construction progress. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention provides an adjustable installation device and method for distribution transformers, which solves the problems of low efficiency and easy damage to equipment during transformer installation in the prior art.

[0006] On one hand, according to an embodiment of the present invention, an adjustable mounting device for a distribution transformer, installed between two transformer base frames, is used to mount the transformer onto a channel steel crossarm, comprising:

[0007] The I-beam includes a first flange, a second flange, and a web connecting the first flange and the second flange. The first flange is connected to the transformer base frame via an installation unit.

[0008] Two limiting plates are slidably disposed on both sides of the upper surface of the second flange plate along the width direction. The web plate is provided with an adjustment unit connected to the two limiting plates, which is used to drive the two limiting plates to extend synchronously out of the edge of the second flange plate in the width direction, so that when both limiting plates abut against the inner side of the flange plate of the channel steel crossarm, the axis of the transformer is vertically aligned with the axis of the channel steel crossarm.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] In this solution, two synchronously extendable limiting plates are set on the second flange plate, and the inner side of the flange plate of the channel steel crossarm is used as the centering reference. When the adjustment unit drives the two limiting plates to extend outward synchronously and abut against the inner side of the flange plate of the channel steel crossarm, the axis of the transformer automatically maintains a vertical alignment with the axis of the channel steel crossarm. This eliminates the need for repeated manual observation and avoids multiple lifting and repositioning due to hoisting sway and visual deviation. At the same time, after vertical alignment, the transformer can be pushed to quickly align the mounting holes without the need for violent prying while the transformer is in contact with the channel steel crossarm, thus avoiding the risk of equipment damage.

[0011] On the other hand, according to an embodiment of the present invention, an adjustable installation method for a distribution transformer includes an adjustable installation device and further includes the following steps:

[0012] S1: Installation in place, the first flange plate is connected to the transformer base frame through the installation unit, and the transformer is lifted by external hoisting equipment so that the transformer is suspended above the channel steel crossarm;

[0013] S2: Centering adjustment, start the adjustment unit, drive the two limit plates to extend synchronously out of the edge of the second flange plate in the width direction until both limit plates abut against the inner side of the flange plate of the channel steel crossarm, so that the axis of the transformer corresponds vertically with the axis of the channel steel crossarm, and complete the centering and positioning.

[0014] S3: Lift and separate, start the drive unit, so that the support pulley extends out of the mounting slot and abuts against the upper surface of the second flange plate, lift the transformer base frame upward, so that a gap is formed between the transformer base frame and the channel steel crossarm, the transformer enters a movable state, and the contact is released from the hoisting.

[0015] S4: Shift and align. Move the transformer horizontally and adjust its horizontal position above the channel steel crossarm until the mounting holes at the bottom of the transformer are aligned vertically with the threaded holes on the channel steel crossarm.

[0016] S5: Position and fix the transformer, retract the support pulley, so that the transformer base frame sits on the channel steel crossarm, pass the fastening bolt through the mounting hole and screw it into the threaded hole to complete the fixed connection between the transformer and the channel steel crossarm.

[0017] S6: Remove the installation, retract the two limiting plates, and move the entire device out between the two transformer base frames.

[0018] Compared with existing technologies, this method has the following advantages:

[0019] In this method, the transformer installation process is broken down into three stages: suspension and centering, lifting and lateral movement, and positioning and fixing. Throughout the installation process, construction workers do not need to climb poles or use crowbars for violent adjustments, which not only protects the equipment but also reduces the safety risks of working at heights and reduces the labor intensity of construction workers. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a transformer mounted on a channel steel crossarm in an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the planar structure of the installation device supported between the channel steel crossarm and the transformer in a front view according to an embodiment of the present invention.

[0022] Figure 3 This is a side view schematic diagram of the planar structure of the installation device supported between the channel steel crossarm and the transformer in an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the planar structure of the mounting device installed on the transformer base frame in an embodiment of the present invention.

[0024] Figure 5 This is a three-dimensional structural diagram of the mounting device installed on the transformer base frame in an embodiment of the present invention.

[0025] Figure 6 This is a three-dimensional structural diagram of the installation device in an embodiment of the present invention.

[0026] In the above attached figures:

[0027] 1. Transformer base frame;

[0028] 2. Channel steel crossbeam;

[0029] 3. I-beam; 301. First flange; 302. Web; 303. Second flange; 304. Mounting base;

[0030] 4. Fixing plate; 401. Fixing pin; 402. Limiting rod;

[0031] 5. Limiting plate; 501. Support protrusion; 502. Mounting groove; 503. Support plate; 504. Support pulley; 505. Limiting pulley; 506. Third expansion joint;

[0032] 6. Sliding sleeve; 601. Adjusting rod;

[0033] 7. First expansion joint;

[0034] 8. Second expansion joint. Detailed Implementation

[0035] The technical solutions in the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] An adjustable installation device for a distribution transformer is proposed in an embodiment of the present invention. It is installed between two transformer chassis 1 and is used to install the transformer on a channel steel cross arm 2, including:

[0037] An I-shaped plate 3, which includes a first flange 301, a second flange 303, and a web 302 connecting the first flange 301 and the second flange 303. The first flange 301 is connected to the transformer chassis 1 through an installation unit;

[0038] Two limiting plates 5 are respectively and slidably arranged on both sides along the width direction of the upper surface of the second flange 303. The web 302 is provided with an adjusting unit, and the adjusting unit is connected to the two limiting plates 5 and is used to drive the two limiting plates 5 to synchronously extend out of the edges in the width direction of the second flange 303, so that when both of the two limiting plates 5 abut against the inner side surfaces of the flanges of the channel steel cross arm 2, the axis of the transformer is vertically corresponding to the axis of the channel steel cross arm 2.

[0039] In this embodiment, as Figures 1 to 6 shown, the channel steel cross arm 2 is a channel steel structure with a "C"-shaped cross section and is fixed between two electric poles. For the I-shaped plate 3, it is composed of a first flange 301, a second flange 303, and a web 302 connecting the two. The first flange 301 is located above, the second flange 303 is located below, and the web 302 extends in the vertical direction. When the transformer is hoisted in place, the second flange 303 extends into the open groove of the channel steel cross arm 2, that is, between the two flanges of the channel steel cross arm 2.

[0040] Secondly, the limiting plates 5 can slide horizontally along the width direction of the upper surface of the second flange 303. At the same time, the adjusting unit is arranged on the web 302 and is in transmission connection with the two limiting plates 5, and is used to drive the two limiting plates 5 to synchronously extend out of the edges in the width direction of the second flange 303 and move towards the inner side surfaces of the flanges of the channel steel cross arm 2.

[0041] In summary, during the installation process of the transformer, first, the first flange 301 of the I-shaped plate 3 is connected to the transformer chassis 1 through the installation unit, so that the whole device is hoisted together with the transformer. When the transformer is lifted above the channel steel cross arm 2, lower it so that the second flange 303 of the I-shaped plate 3 extends into the open groove of the channel steel cross arm 2. At this time, the transformer is in a suspended state or about to be seated state, as shown in Figure 2 and Figure 3As shown. Then, the adjustment unit is activated, pushing the two limiting plates 5 to extend outward synchronously. The limiting plates 5 slide outward along the upper surface of the second flange plate 303 until the outer side of the limiting plates 5 abuts against the inner side of the flange plate of the channel steel crossarm 2. At this time, the transformer is still in the hoisting state. Since the two limiting plates 5 extend synchronously and the extension distance is equal, when both limiting plates 5 on both sides abut against the inner side of the corresponding flange plate, the I-beam 3 is limited to the center position in the width direction of the channel steel crossarm 2, thus completing the centering adjustment, so that the hole position of the transformer base frame 1 is horizontally aligned with the hole position of the channel steel crossarm 2. Then, the transformer is pushed so that the hole position of the transformer base frame 1 is vertically aligned with the hole position of the channel steel crossarm 2.

[0042] The entire alignment process is mechanically driven by the adjustment unit, eliminating the need for repeated manual observation and hoisting adjustments. This avoids the need for multiple lifting and repositioning due to hoisting sway and visual deviations in traditional construction, achieving alignment and positioning in one go and improving installation efficiency. At the same time, the device has a compact structure and is installed between two transformer base frames 1. The second flange plate 303 of the I-beam 3 extends into the opening groove of the channel steel crossarm 2, making full use of the internal space of the channel steel crossarm 2 without occupying additional vertical height. It can also flexibly adapt to different specifications of channel steel crossarm 2 and transformer base frames 1 with different spacing, making it highly adaptable.

[0043] Specifically, the structure of the regulating unit is optimized, such as... Figure 4 and Figure 6 As shown, the adjustment unit includes:

[0044] Sliding sleeve 6, which is slidably sleeved on the web plate 302;

[0045] Several adjusting rods 601, one end of each adjusting rod 601 is respectively hinged to both sides of the sliding sleeve 6, and the other end of each adjusting rod 601 is respectively hinged to the corresponding limiting plate 5;

[0046] An adjusting member is provided on the web 302 and connected to the sliding sleeve 6. It is used to drive the sliding sleeve 6 to slide along the height direction of the web 302 to adjust the opening angle of each adjusting rod 601.

[0047] When it is necessary to extend the two limiting plates 5 outward for centering and positioning, the sliding sleeve 6 is pushed downward along the web plate 302 by the adjusting member. When the sliding sleeve 6 moves downward, the adjusting rods 601 hinged to both sides of the sliding sleeve 6 also move downward. Since the other end of the adjusting rod 601 is hinged to the limiting plate 5, and the limiting plate 5 can only slide in the horizontal direction and cannot move up and down, the downward movement of the adjusting rod 601 will push the two limiting plates 5 to extend outward synchronously. The adjusting rods 601 are symmetrically arranged on both sides of the sliding sleeve 6, and the movement of the sliding sleeve 6 simultaneously drives the two adjusting rods 601 to move. Therefore, the extension distance of the two limiting plates 5 is always equal, realizing synchronous extension.

[0048] Secondly, a linear bearing or anti-friction coating can be provided between the sliding sleeve 6 and the web plate 302 to reduce sliding friction resistance and ensure smooth movement of the sliding sleeve 6. Moreover, the adjusting component can take various forms, such as screw drive. Preferably, the adjusting component is a first telescopic device 7. The telescopic end of the first telescopic device 7 is connected to the sliding sleeve 6. The up and down movement of the sliding sleeve 6 can be quickly controlled by telescopically extending and retracting the telescopic end of the first telescopic device 7. The first telescopic device 7 can be a hydraulic cylinder, oil cylinder or electric cylinder according to actual needs.

[0049] Specifically, the structure of the installation unit is optimized, such as... Figure 4 and Figure 6 As shown, the installation unit includes:

[0050] Two fixing plates 4 are located at both ends of the first flange plate 301;

[0051] Two second expansion joints 8 are respectively located at both ends of the web plate 302, and their expansion ends are respectively connected to the corresponding fixed plates 4, so that the two fixed plates 4 respectively abut against the inner side of the two transformer base frames 1.

[0052] When the first flange plate 301 needs to be fixedly connected to the transformer base frame 1, the telescopic ends of the two second expansion joints 8 are extended synchronously, pushing the two fixed plates 4 towards the inner side of the two transformer base frames 1 respectively, until the contact surface of the fixed plates 4 is tightly fitted with the inner side of the transformer base frame 1. This allows the two fixed plates 4 to abut against the inner side of the two transformer base frames 1, clamping and fixing the I-beam plate 3 between the two transformer base frames 1. Simultaneously, to ensure the stability and directionality of the fixed plates 4 during movement, mounting seats 304 are provided at both ends of the first flange plate 301, and the fixed plates 4 are also provided with limiting rods 402. The limiting rods 402 pass through the mounting seats 304. When the second expansion joints 8 drive the fixed plates 4 to move, the limiting rods 402 slide within the mounting seats 304, providing guidance for the fixed plates 4 and preventing them from deflecting or tilting during movement. They can also bear some vertical force, reducing the pressure on the second expansion joints 8. Similarly, the second expansion joints 8 can be hydraulic cylinders, oil cylinders, or electric cylinders, depending on actual needs.

[0053] To increase installation stability, the fixing plate 4 is equipped with fixing pins 401, and the transformer base frame 1 has fixing holes. The fixing pins 401 are inserted into the corresponding fixing holes. When the second telescopic device 8 drives the fixing plate 4 to move inward toward the transformer base frame 1, the fixing pins 401 move toward the transformer base frame 1 together with the fixing plate 4, so that the front end of the fixing pins 401 can enter the fixing holes opened on the transformer base frame 1, and can withstand the force perpendicular to the moving direction of the fixing plate 4, thus increasing the installation stability.

[0054] Based on the above scheme, after centering adjustment, the transformer can be released from hoisting. During hoisting, the second flange plate 303 needs to be placed flat on the channel steel crossarm 2. At this point, centering adjustment has been completed, and releasing the hoist can prevent swaying. Furthermore, to facilitate the translation of the transformer, such as... Figure 6 As shown, the outer sides of both limiting plates 5 are bent downward to form support protrusions 501. The support protrusions 501 have mounting grooves 502. A support plate 503 is slidably mounted in the mounting grooves 502. Several support pulleys 504 are provided at the bottom end of the support plate 503. The limiting plate 5 is also provided with a driving component. The driving component is connected to the support plate 503 and is used to drive each support pulley 504 to extend out of the mounting groove 502. When the support pulley 504 rolls into contact with the upper surface of the second flange plate 303, there is a gap between the transformer base frame 1 and the channel steel crossarm 2.

[0055] After the centering adjustment is completed, the transformer axis is vertically aligned with the axis of the channel steel crossarm 2. The hoisting equipment can slowly lower the transformer so that the second flange plate 303 is placed flat on the upper surface of the channel steel crossarm 2. To achieve horizontal translation of the transformer, the outer sides of both limiting plates 5 are bent downward to form support protrusions 501. When it is necessary to lift the transformer for translation, the control drive pushes the support plate 503 to slide downward along the mounting groove 502, so that the support pulley 504 extends out from the lower end opening of the mounting groove 502. The support pulley 504 continues to move downward until it contacts the upper surface of the second flange plate 303, but continues to move downward. The support pulley 504 can apply downward pressure to the upper surface of the second flange plate 303, thereby driving the limiting plate 5 and the entire device connected to it to move upward. Figure 3 As shown, a gap of L is created between the transformer base frame 1 and the channel steel crossarm 2, where L is greater than 0 mm. At this time, the transformer is supported by the support pulley 504 and is completely disengaged from the channel steel crossarm 2, entering a state where it can move freely. When the operator pushes the transformer in the horizontal direction, the support pulley 504 rolls on the upper surface of the second flange plate 303, reducing the frictional resistance during the translation process.

[0056] There are many forms of driving components, such as screw drive. Preferably, the driving component is a third telescopic device 506. The telescopic end of the third telescopic device 506 passes through the mounting groove 502 and is connected to the support plate 503. The extension and retraction of the telescopic end of the third telescopic device 506 can be directly controlled to control the extension or retraction of the support pulley 504. Similarly, the third telescopic device 506 can be a hydraulic cylinder, oil cylinder or electric cylinder according to actual needs.

[0057] Specifically, such as Figure 5As shown, several limiting pulleys 505 are provided on the outer side of both limiting plates 5. The limiting pulleys 505 can be casters. Unlike the support pulleys 504, the limiting plates 5 may have upward movement. The limiting pulleys 505 with casters can slide normally. At the same time, the friction during translation is reduced under the action of the limiting pulleys 505, which makes it convenient to adjust the transformer.

[0058] This invention also proposes an adjustable installation method for a distribution transformer, including the aforementioned adjustable installation device, and further comprising the following steps:

[0059] S1: Installation in place, the first flange plate 301 is connected to the transformer base frame 1 through the installation unit, and the transformer is lifted by external hoisting equipment so that the transformer is suspended above the channel steel crossarm 2;

[0060] S2: Centering adjustment, start the adjustment unit, drive the two limit plates 5 to extend synchronously out of the edge of the second flange plate 303 in the width direction until the two limit plates 5 abut against the inner side of the flange plate of the channel steel crossarm 2, so that the axis of the transformer corresponds vertically with the axis of the channel steel crossarm 2, and the centering positioning is completed.

[0061] S3: Lift and separate, start the drive unit, so that the support pulley 504 extends out of the mounting groove 502 and abuts against the upper surface of the second flange plate 303, lift the transformer base frame 1 upward, so that a gap is formed between the transformer base frame 1 and the channel steel crossarm 2, the transformer enters a movable state, and the contact is released from hoisting.

[0062] S4: Shift and align. Move the transformer horizontally and adjust its horizontal position above the channel steel crossarm 2 until the mounting holes at the bottom of the transformer are aligned vertically with the threaded holes on the channel steel crossarm 2.

[0063] S5: Position and fix, retract the support pulley 504, so that the transformer base frame 1 sits on the channel steel crossarm 2, pass the fastening bolt through the mounting hole and screw it into the threaded hole to complete the fixed connection between the transformer and the channel steel crossarm 2.

[0064] S6: Remove the installation, retract the two limiting plates 5, and move the entire device out between the two transformer base frames 1.

[0065] In steps S1 and S2, the transformer is suspended and supported by the hoisting equipment. When the limit plate 5 extends, there is no need to overcome the contact friction between the transformer and the channel steel crossarm 2. The driving force requirement of the adjustment unit is small, and the centering process is smoother. At the same time, the centering adjustment in the suspended state will not cause scratch damage to the surface of the transformer base frame 1 or the channel steel crossarm 2.

[0066] In steps S3 and S4, the support pulley 504 extends and abuts against the upper surface of the second flange plate 303, lifting the transformer base frame 1 upward. At this time, the weight of the transformer is transferred from the hoisting equipment to the support pulley 504. Then the hoisting is released, and the transformer is completely supported by the support pulley 504. At the same time, the transformer enters a state where it can be moved freely. The transformer can be easily moved in the horizontal direction to accurately align the mounting holes and threaded holes one by one.

[0067] In step S5, after the support pulley 504 is retracted, the transformer base frame 1 falls naturally under the action of gravity. Since the horizontal alignment has been completed in step S4, the mounting hole and the threaded hole are accurately aligned in the vertical direction. During the falling process, the bolt hole automatically completes the insertion and engagement, and the fastening bolt can be inserted and fixed without additional adjustment.

[0068] In step S6, after the limiting plate 5 is retracted, the device is completely detached from the transformer base frame 1 and can be moved out from between the two transformer base frames 1 as a whole for easy reuse in the future.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An adjustable mounting device for a distribution transformer, installed between two transformer base frames (1), for mounting the transformer on a channel steel crossarm (2), characterized in that, include: I-beam (3), the I-beam (3) includes a first flange (301), a second flange (303) and a web (302) connecting the first flange (301) and the second flange (303), the first flange (301) being connected to the transformer base frame (1) via an installation unit; Two limiting plates (5) are slidably disposed on both sides of the upper surface of the second flange plate (303) along the width direction. The web plate (302) is provided with an adjustment unit, which is connected to the two limiting plates (5) to drive the two limiting plates (5) to extend synchronously out of the edge of the second flange plate (303) in the width direction, so that when the two limiting plates (5) abut against the inner side of the flange plate of the channel steel crossarm (2), the axis of the transformer is vertically aligned with the axis of the channel steel crossarm (2).

2. The adjustable mounting device according to claim 1, characterized in that, The adjustment unit includes: Sliding sleeve (6), which is slidably sleeved on the web plate (302); A plurality of adjusting rods (601), one end of each adjusting rod (601) is respectively hinged to both sides of the sliding sleeve (6), and the other end of each adjusting rod (601) is respectively hinged to the corresponding limiting plate (5); An adjusting member is provided on the web (302) and connected to the sliding sleeve (6) for driving the sliding sleeve (6) to slide along the height direction of the web (302) to adjust the opening angle of each adjusting rod (601).

3. The adjustable mounting device according to claim 2, characterized in that, The adjusting component is a first telescopic device (7), and the telescopic end of the first telescopic device (7) is connected to the sliding sleeve (6).

4. The adjustable mounting device according to claim 1, characterized in that, The installation unit includes: Two fixing plates (4) are respectively located at both ends of the first flange plate (301); Two second expansion joints (8) are respectively located at both ends of the web plate (302), and their expansion ends are respectively connected to the corresponding fixed plates (4) for making the two fixed plates (4) abut against the inner side of the two transformer base frames (1).

5. The adjustable mounting device according to claim 4, characterized in that, The fixing plate (4) is provided with fixing pins (401), and the transformer base frame (1) is provided with fixing holes. The fixing pins (401) are inserted into the corresponding fixing holes.

6. The adjustable mounting device according to claim 4, characterized in that, The first flange plate (301) is provided with mounting bases (304) at both ends, and the fixing plate (4) is also provided with a limiting rod (402), which passes through the mounting base (304).

7. The adjustable mounting device according to claim 1, characterized in that, Both of the limiting plates (5) are bent downwards on their outer sides to form support protrusions (501). The support protrusions (501) are provided with mounting grooves (502). A support plate (503) is slidably provided in the mounting grooves (502). The bottom end of the support plate (503) is provided with several support pulleys (504). The limiting plate (5) is also provided with a driving member. The driving member is connected to the support plate (503) and is used to drive each of the support pulleys (504) to extend out of the mounting grooves (502). When the support pulleys (504) roll into contact with the upper surface of the second flange plate (303), there is a gap between the transformer base frame (1) and the channel steel crossarm (2).

8. The adjustable mounting device according to claim 7, characterized in that, The driving component is a third telescopic device (506), and the telescopic end of the third telescopic device (506) extends through the mounting groove (502) and is connected to the support plate (503).

9. The adjustable mounting device according to claim 1, characterized in that, Both of the aforementioned limiting plates (5) are provided with several limiting pulleys (505) on their outer sides.

10. An adjustable installation method for a distribution transformer, characterized in that, The adjustable mounting device according to any one of claims 7-9 further includes the following steps: S1: Installation in place, the first flange plate (301) is connected to the transformer base frame (1) through the installation unit, and the transformer is lifted by external hoisting equipment so that the transformer is suspended above the channel steel crossarm (2); S2: Centering adjustment, start the adjustment unit, drive the two limiting plates (5) to extend synchronously out of the edge of the second flange plate (303) in the width direction until the two limiting plates (5) abut against the inner side of the flange plate of the channel steel crossarm (2), so that the axis of the transformer corresponds vertically to the axis of the channel steel crossarm (2), and the centering positioning is completed. S3: Lift and separate, start the drive unit, so that the support pulley (504) extends out of the mounting groove (502) and abuts against the upper surface of the second flange plate (303), lift the transformer base frame (1) upward, so that a gap is formed between the transformer base frame (1) and the channel steel crossarm (2), the transformer enters a movable state, and the contact is released from hoisting; S4: Shift and align, move the transformer horizontally, adjust the transformer's horizontal position above the channel steel crossarm (2) until the mounting holes at the bottom of the transformer and the threaded holes on the channel steel crossarm (2) are aligned vertically. S5: Position and fix, retract the support pulley (504) so ​​that the transformer base frame (1) sits on the channel steel crossarm (2), pass the fastening bolt through the mounting hole and screw it into the threaded hole to complete the fixed connection between the transformer and the channel steel crossarm (2). S6: Remove the installation, retract the two limiting plates (5), and move the entire device out between the two transformer base frames (1).

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