Portable transformer for electric power engineering construction

Abstract

The invention belongs to the technical field of electric power engineering, and discloses a portable transformer for electric power engineering construction, which comprises an equipment case, a voltage monitoring instrument unit mounted on the side surface of the equipment case, moving trundles mounted at four corners of the bottom end of the equipment case, and a main transformer winding iron core unit mounted in the equipment case, the portable transformer for electric power engineering construction further comprises an installation positioning adjusting mechanism and a line positioning assembly. The installation positioning adjusting mechanism is installed between an equipment case and the main transformer winding iron core unit, and the main transformer winding iron core unit can be moved to a second position where operation is convenient through the installation positioning adjusting mechanism, so that an operator can work on a completely-unfolded wiring interface in a comfortable standing posture, and the operation efficiency is improved. The wiring terminal is clear and distinguishable and can be touched by a hand, the overall wiring time is greatly shortened to be within 30 minutes, and the wiring terminal does not need to lean into a box, so that the safety risk is remarkably reduced.

Description

Technical Field

[0001] This invention belongs to the field of power engineering technology, and in particular relates to a portable transformer for power engineering construction. Background Technology

[0002] In scenarios such as power engineering construction, emergency power supply guarantee, and temporary event power supply, it is often necessary to quickly and flexibly deploy temporary power transformation and distribution nodes at different locations. Traditionally, the power equipment used in such scenarios is usually assembled on-site from standard three-phase isolation transformers (e.g., 480V input / 208V output) and supporting power distribution and protection units. However, this temporary application mode based on fixed industrial equipment has a series of inherent technical defects, which seriously restrict construction efficiency, safety and economy. The three-phase isolation transformers in the existing technology are designed for fixed installation. Their enclosure structure is bulky and heavy, and they do not have an optimized design for mobile transportation. Although there are so-called "portable" improved models on the market, such as adding heavy-duty pulleys to the bottom of the enclosure or adding lifting rings to the top, these are only partial accessories. After the transformer is deployed to the work site, complex on-site installation work is required. Subsequently, the construction personnel need to open the high-protection enclosure and complete the heavy work of wiring high and low voltage cables, connecting grounding wires, and debugging protection devices in the narrow space inside. The whole process involves the cooperation of multiple trades, is time-consuming (usually several hours), and is extremely dependent on the operator's proficiency. It cannot meet the construction needs of emergency repairs and rotating operations that have extremely high time requirements. Summary of the Invention

[0003] This invention addresses the problem that existing technologies involve arduous high- and low-voltage cable wiring, grounding wire connection, and protection device debugging within confined internal spaces. This process involves multiple trades, is time-consuming (typically several hours), and is highly dependent on operator skill, failing to meet the time-sensitive requirements of emergency repairs and rotating shifts. The invention proposes the following technical solution: A portable transformer for power engineering construction includes: an equipment chassis, a voltage monitoring instrument unit installed on the side of the equipment chassis, casters installed at the four corners of the bottom of the equipment chassis, and a main transformer winding core unit installed inside the equipment chassis. Portable transformers used in power engineering construction also include installation and positioning adjustment mechanisms and line positioning components; The installation positioning adjustment mechanism is installed between the equipment chassis and the main transformer winding core unit, and the line positioning component is connected between the installation positioning adjustment mechanism and the inner wall of the equipment chassis.

[0004] As a preferred embodiment of the above technical solution, the installation positioning adjustment mechanism includes an installation adjustment base plate fixedly installed at the bottom end of the main transformer winding core unit. Guide rails are symmetrically installed at the bottom end of the installation adjustment base plate, and the guide rails are slidably connected to the inside of the equipment chassis. An installation positioning column is connected through the inside of the guide rails. The two ends of the installation positioning column are fixedly connected to the inside of the equipment chassis. A round rod is rotatably connected at equal intervals at the bottom end of the installation adjustment base plate, and the outer surface of the round rod is in contact with the bottom end of the inner wall of the equipment chassis.

[0005] As a preferred embodiment of the above technical solution, a positioning fixing plate is symmetrically fixedly installed on one end of the mounting adjustment base plate, and an L-shaped mounting bracket is fixedly installed on the end of the positioning fixing plate away from the mounting adjustment base plate. A common synchronous adjustment connecting plate is sleeved between the top ends of the two positioning fixing plates. A telescopic positioning sleeve is symmetrically fixedly installed on the top end of the synchronous adjustment connecting plate, and a locking fixing block is fixedly installed on the top end of the telescopic positioning sleeve. The end of the locking fixing block away from the mounting adjustment base plate is fixedly connected to the inner wall of the equipment chassis.

[0006] As a preferred embodiment of the above technical solution, the top length and width of the L-shaped mounting bracket and the positioning fixing plate are equal, and the bottom end of the synchronous adjustment connecting plate is provided with a groove, the length and width of which are equal to the top length and width of the positioning fixing plate.

[0007] As a preferred embodiment of the above technical solution, a buffer pad is bonded inside the groove of the positioning and fixing plate, a rounded corner is provided at one end of the synchronous adjustment connecting plate near the positioning and fixing plate, and a horizontal adjustment beam is fixedly installed on one side of the synchronous adjustment connecting plate.

[0008] As a preferred embodiment of the above technical solution, the line positioning component includes a cable bracket mounting plate fixedly installed inside the equipment chassis. A cable positioning block is fixedly installed at one end of the cable bracket mounting plate near the main transformer winding core unit. A cable sliding bracket is sleeved on the outside of the cable positioning block. A rectangular cable fixing plate is fixedly installed at one end of the cable sliding bracket near the main transformer winding core unit. A cable storage frame is fixedly installed at one end of the rectangular cable fixing plate.

[0009] As a preferred embodiment of the above technical solution, a cable fixing column is fixedly installed at the top of the horizontal adjusting beam. A guide groove is provided at the end of the cable fixing column away from the main transformer winding core unit. A protrusion is welded to one end of the cable bracket mounting plate, and the protrusion is slidably connected inside the guide groove.

[0010] As a preferred embodiment of the above technical solution, the cable fixing column is L-shaped, a limiting rod is embedded in the bottom of the cable fixing column, and two round holes are symmetrically opened at the top of the rectangular cable fixing plate.

[0011] As a preferred embodiment of the above technical solution, the center lines of the limiting rod and the circular hole coincide, the limiting rod is tapered, and the bottom diameter of the limiting rod is smaller than the top diameter. As a preferred embodiment of the above technical solution, the telescopic positioning sleeve is composed of a sleeve and a cylinder, with the center lines of the sleeve and the cylinder coinciding, wherein the cylinder is slidably connected inside the sleeve.

[0012] The beneficial effects of this invention are as follows: (1) By installing the positioning adjustment mechanism, the main transformer winding core unit can be moved to the "second position" that is easy to operate, so that the operator can work in a comfortable standing position facing the fully unfolded wiring interface. The wiring terminals are clearly visible and within reach, greatly reducing the overall wiring time from several hours to less than 30 minutes, and there is no need to lean into the box, which significantly reduces the safety risk.

[0013] (2) The line positioning component ensures that all control and monitoring lines always extend and retract synchronously along the preset path, eliminating entanglement, pulling and excessive bending. This “follow-up” cable management avoids the problems of insulation wear and joint stress concentration caused by random cable laying and disorderly bending in the traditional method, and significantly improves the connection reliability and service life of the internal secondary lines. (3) Through the cooperation of guide rails, positioning columns and telescopic sleeves, the main transformer winding core unit can be moved smoothly and positioned precisely between two workstations. By using the snap-fit ​​cooperation between the synchronous adjustment connecting plate and the L-shaped mounting bracket, and the plug-fit cooperation between the limit rod and the rectangular cable fixing plate, quick locking after movement is achieved, and the operation process is simple and reliable. Attached Figure Description

[0014] Figure 1 The diagram shown is a structural schematic of a portable transformer used in power engineering construction according to Embodiment 1; Figure 2 The diagram shown is a schematic diagram of the internal structure of a portable transformer used in power engineering construction according to Embodiment 1; Figure 3 The diagram shown is a schematic diagram of the structure in Embodiment 1 where the positioning adjustment mechanism is installed; Figure 4 What is shown is Figure 3 Schematic diagram of the structure of region A in the middle; Figure 5 What is shown is Figure 3 Schematic diagram of the structure of region B in the middle; Figure 6 The diagram shown is a structural schematic of the line positioning component in Embodiment 1.

[0015] In the diagram: 1. Equipment chassis; 2. Voltage monitoring instrument unit; 3. Casters; 4. Main transformer winding core unit; 5. Installation positioning and adjustment mechanism; 51. Installation adjustment base plate; 52. Guide rail slide bar; 53. Installation positioning column; 54. Round rod; 55. Positioning fixing plate; 56. L-shaped mounting bracket; 57. Synchronous adjustment connecting plate; 58. Telescopic positioning sleeve; 59. Locking fixing block; 510. Horizontal adjustment beam; 6. Line positioning assembly; 61. Cable fixing column; 62. Guide groove; 63. Cable positioning block; 64. Cable bracket mounting plate; 65. Cable slide bar bracket; 66. Rectangular cable fixing plate; 67. Cable storage frame; 68. Limiting rod. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0017] Example 1 This invention provides a portable transformer for power engineering construction, such as... Figures 1 to 6 As shown, it includes: equipment chassis 1, voltage monitoring instrument unit 2 installed on the side of equipment chassis 1, movable casters 3 installed at the four corners of the bottom of equipment chassis 1, and main transformer winding core unit 4 installed inside equipment chassis 1. Portable transformers used in power engineering construction also include a positioning and adjustment mechanism 5 and a line positioning component 6; The mounting and positioning adjustment mechanism 5 is installed between the equipment chassis 1 and the main transformer winding core unit 4, and the line positioning component 6 is connected between the mounting and positioning adjustment mechanism 5 and the inner wall of the equipment chassis 1.

[0018] In existing technologies, after a transformer is deployed to the work site, complex on-site installation work is required. Subsequently, construction personnel must open the high-protection enclosure and complete the arduous tasks of wiring high and low voltage cables, connecting grounding wires, and debugging protection devices within the confined space. The entire process involves collaboration among multiple trades, is time-consuming (usually several hours), and is highly dependent on the operator's skill level, making it difficult to meet the time-sensitive construction needs of emergency repairs and rotating operations. This application uses a positioning adjustment mechanism 5 to make the main transformer winding core unit 4 have two positions inside the equipment chassis 1: one near the cabinet door of the equipment chassis 1 (first position) and the other near the inside of the equipment chassis 1 (second position). When the main transformer winding core unit 4 is moved to the "second position", the operator can work in front of the equipment chassis 1 in a natural and comfortable standing posture, facing the fully unfolded and clear wiring interface. All terminals are clearly identifiable and within easy reach. Cable crimping and securing can be completed quickly using standard tools, reducing the overall wiring time from several hours to less than 30 minutes. Furthermore, it eliminates the need for a professional electrician to enter the wiring area, greatly reducing safety risks. In addition, while adjusting the position of the main transformer winding core unit 4, the mechanism synchronously guides and constrains the connecting wires through the line positioning component 6. The cables are orderly coiled in the storage frame in an interlaced manner. Under the linkage of the line positioning component 6, the length of the cable retraction and extension is automatically matched with the displacement of the transformer unit, and the folding shape is orderly converted between inward and outward. This ensures that all control and monitoring lines always extend and retract synchronously along the preset path, eliminating entanglement, pulling and excessive bending. This "follow-up" cable management avoids the problems of insulation wear and joint stress concentration caused by random cable laying and disorderly bending in the traditional method, which significantly improves the connection reliability and service life of the internal secondary circuits.

[0019] The staff opens the equipment chassis 1 and pulls the main transformer winding core unit 4. At this time, the main transformer winding core unit 4 drives the installation positioning and adjustment mechanism 5 to operate, which in turn drives the line positioning component 6 to operate, thereby moving the main transformer winding core unit 4 from inside the equipment chassis 1 outwards. Simultaneously, it guides the connection line between the main transformer winding core unit 4 and the voltage monitoring instrument unit 2, realizing the automatic winding and straightening of the line.

[0020] Specifically, a voltage monitoring instrument unit 2 (specifically a digital voltage display instrument) is embedded in the side of the equipment chassis 1. Casters 3 (specifically omnidirectional wheels) are installed at the four corners of the bottom of the equipment chassis 1 using screws. A main transformer winding core unit 4 is located in the middle of the equipment chassis 1. The main transformer winding core unit 4 and the voltage monitoring instrument unit 2 are electrically connected via cables. An installation positioning adjustment mechanism 5 is installed between the equipment chassis 1 and the main transformer winding core unit 4. A line positioning component 6 is installed between the installation positioning adjustment mechanism 5 and the inner wall of the equipment chassis 1.

[0021] To enable the main transformer winding core unit 4 to have two workstations inside the equipment chassis 1, the following solution is provided, such as... Figures 2 to 5As shown, the installation positioning adjustment mechanism 5 includes an installation adjustment base plate 51 fixedly installed at the bottom of the main transformer winding core unit 4. Guide rails 52 are symmetrically installed at the bottom of the installation adjustment base plate 51, and the guide rails 52 are slidably connected to the inside of the equipment housing 1. An installation positioning column 53 is connected through the guide rails 52, and both ends of the installation positioning column 53 are fixedly connected to the inside of the equipment housing 1. Round rods 54 are equidistantly rotatably connected to the bottom of the installation adjustment base plate 51, and the outer surface of the round rods 54 is in contact with the bottom of the inner wall of the equipment housing 1. A positioning fixing plate 55 is symmetrically fixedly installed on one end of the installation adjustment base plate 51. An L-shaped mounting bracket 56 is fixedly installed on the end of the positioning fixing plate 55 away from the installation adjustment base plate 51. A common synchronous adjustment connecting plate 57 is sleeved between the tops of the two positioning fixing plates 55. A telescopic positioning sleeve 58 is symmetrically fixedly installed on the top of the connecting plate 57. A locking block 59 is fixedly installed on the top of the telescopic positioning sleeve 58. The end of the locking block 59 away from the mounting adjustment base plate 51 is fixedly connected to the inner wall of the equipment housing 1. The length and width of the top of the L-shaped mounting bracket 56 and the positioning fixing plate 55 are equal. A groove is opened at the bottom of the synchronous adjustment connecting plate 57. The length and width of the groove are equal to the length and width of the top of the positioning fixing plate 55. A buffer pad is bonded inside the groove of the positioning fixing plate 55. A rounded corner is opened at the end of the synchronous adjustment connecting plate 57 near the positioning fixing plate 55. A horizontal adjustment beam 510 is fixedly installed on the edge of one end of the synchronous adjustment connecting plate 57. The telescopic positioning sleeve 58 is composed of a sleeve and a cylinder, and the center lines of the sleeve and the cylinder coincide. The cylinder is slidably connected inside the sleeve.

[0022] When in use, pull the horizontal adjustment beam 510. The horizontal adjustment beam 510 moves upward, causing the synchronous adjustment connecting plate 57 to move upward. When the synchronous adjustment connecting plate 57 moves upward, the groove separates from the positioning fixing plate 55. Then, the installation adjustment base plate 51 is pulled. When the installation adjustment base plate 51 moves, it drives the main transformer winding core unit 4 to move. At the same time, it drives the guide rail slide 52 to slide along the installation positioning column 53 inside the equipment box 1, so that the main transformer winding core unit 4 moves out of the equipment box 1. When the main transformer winding core unit 4 moves to the position where it is in contact with the inner wall of the equipment box 1, the main transformer winding core unit 4 enters the second working position. Then, the personnel push the horizontal adjustment beam 510 down. The horizontal adjustment beam 510 down drives the synchronous adjustment connecting plate 57 down. When the synchronous adjustment connecting plate 57 down, it enters the outside of the L-shaped mounting bracket 56 through the groove, thereby fixing the L-shaped mounting bracket 56. When the L-shaped mounting bracket 56 is fixed, the installation adjustment base plate 51 is fixed by the positioning fixing plate 55.

[0023] Specifically, a mounting adjustment base plate 51 is screwed onto the bottom of the main transformer winding core unit 4. Guide rail slides 52 are symmetrically mounted onto the bottom of the mounting adjustment base plate 51 via screws. A groove is formed on the inner wall of the equipment housing 1 corresponding to the end position of the guide rail slide 52. The guide rail slide 52 is slidably connected to the inside of the equipment housing 1 through the groove. A mounting positioning column 53 is connected through the inside of the guide rail slide 52. A fitting hole is formed inside the guide rail slide 52, through which the mounting positioning column 53 passes, thus limiting the position of the guide rail slide 52. Both ends of the mounting positioning column 53 are connected to the equipment housing 1. The internal components are fixedly connected. A round rod 54 is equidistantly rotatably connected to the bottom end of the mounting and adjusting base plate 51, and the outer surface of the round rod 54 is in contact with the bottom end of the inner wall of the equipment chassis 1. The round rod 54 reduces the friction between the mounting and adjusting base plate 51 and the equipment chassis 1, thereby reducing the difficulty of moving the main transformer winding core unit 4. A positioning and fixing plate 55 is symmetrically welded to one end of the mounting and adjusting base plate 51. An L-shaped mounting bracket 56 is fixedly installed at the end of the positioning and fixing plate 55 away from the mounting and adjusting base plate 51 by a pin. A synchronous adjusting connecting plate 57 is sleeved between the top ends of the two positioning and fixing plates 55. The mounting bracket 56 and the positioning fixing plate 55 have equal length and width at their top ends. The bottom end of the synchronous adjustment connecting plate 57 has a groove, the length and width of which are equal to the length and width of the top end of the positioning fixing plate 55. A buffer pad is adhered inside the groove of the positioning fixing plate 55 for connecting the L-shaped mounting bracket 56 and the positioning fixing plate 55 to the synchronous adjustment connecting plate 57, reducing the impact force during connection. A telescopic positioning sleeve 58 is symmetrically fixed to the top end of the synchronous adjustment connecting plate 57. The telescopic positioning sleeve 58 is composed of a sleeve and a cylinder, with the center lines of the sleeve and the cylinder coinciding. The cylinder slides... The cylindrical bottom end is fixedly connected to the top end of the synchronous adjustment connecting plate 57 inside the bushing. The top end of the telescopic positioning sleeve 58 is fixedly snapped with a locking block 59. The end of the locking block 59 away from the mounting adjustment base plate 51 is fixedly connected to the inner wall of the equipment box 1 by screws. The end of the synchronous adjustment connecting plate 57 near the positioning fixing plate 55 has a rounded corner. A horizontal adjustment beam 510 is fixedly installed on the edge of one end of the synchronous adjustment connecting plate 57 to facilitate pushing the synchronous adjustment connecting plate 57 upward, thereby facilitating the main transformer winding core unit 4 to enter the internal working position inside the equipment box 1.

[0024] To achieve the above embodiment, the following solution is provided to guide the connection line between the main transformer winding core unit 4 and the voltage monitoring instrument unit 2: Figure 2 , Figure 3 and Figure 6As shown, the line positioning component 6 includes a cable bracket mounting plate 64 fixedly installed inside the equipment chassis 1. A cable positioning block 63 is fixedly installed at one end of the cable bracket mounting plate 64 near the main transformer winding core unit 4. A cable sliding bracket 65 is sleeved on the outside of the cable positioning block 63. A rectangular cable fixing plate 66 is fixedly installed at one end of the cable sliding bracket 65 near the main transformer winding core unit 4. A cable storage frame 67 is fixedly installed at one end of the rectangular cable fixing plate 66. The cable storage frame 67 is sleeved on the outside of the cable connecting the main transformer winding core unit 4 and the voltage monitoring instrument unit 2, so that the cable... The cable fixing column 61 is fixedly installed at the top of the horizontal adjusting beam 510, which is concave inward. The end of the cable fixing column 61 away from the main transformer winding core unit 4 is provided with a guide groove 62. One end of the cable bracket mounting plate 64 is welded with a protrusion, which is slidably connected to the inside of the guide groove 62. The cable fixing column 61 is L-shaped. A limit rod 68 is embedded in the bottom of the cable fixing column 61. Two round holes are symmetrically opened at the top of the rectangular cable fixing plate 66. The center line of the limit rod 68 and the round holes coincide. The limit rod 68 is conical in shape, and the diameter of the bottom end of the limit rod 68 is smaller than the diameter of the top end.

[0025] In use, the rise of the horizontal adjustment beam 510 causes the cable fixing column 61 to rise. When the cable fixing column 61 rises, it causes the limiting rod 68 to move along the inside of the round hole, thereby separating the limiting rod 68 from the rectangular cable fixing plate 66. At the same time, the cable fixing column 61 moves along the outside of the protrusion of the cable bracket mounting plate 64 through the guide groove 62. When the main transformer winding core unit 4 moves, it causes the connecting line connected to the voltage monitoring instrument unit 2 to move. At this time, the connecting line causes the cable storage frame 67 to move. When the cable storage frame 67 moves, it causes the cable slide bracket 65 to slide along the outside of the cable positioning block 63 through the rectangular cable fixing plate 66, so that the other round hole of the rectangular cable fixing plate 66 corresponds to the limiting rod 68. Then, the horizontal adjustment beam 510 descends, causing the limiting rod 68 to be inserted into the rectangular cable fixing plate 66 to form a fixation.

[0026] Specifically, a cable fixing column 61 is snapped onto the top of the horizontal adjusting beam 510. A guide groove 62 is provided at the end of the cable fixing column 61 furthest from the main transformer winding core unit 4. A cable bracket mounting plate 64 is installed inside the equipment chassis 1 using screws. A cable positioning block 63 is fixedly installed at the end of the cable bracket mounting plate 64 closest to the main transformer winding core unit 4. A protrusion is welded to one end of the cable bracket mounting plate 64, and the protrusion slides inside the guide groove 62 to limit the movement of the cable fixing column 61 and prevent it from shifting. A cable sliding bracket 65 is sleeved on the outside of the cable positioning block 63, and the cable sliding bracket 65 has a corresponding opening at one end of the cable positioning block 63. A rectangular slot is provided, and the cable slide bracket 65 is slidably connected to the outside of the cable positioning block 63 through the rectangular slot. A rectangular cable fixing plate 66 is fixedly installed at one end of the cable slide bracket 65 near the main transformer winding core unit 4. A cable storage frame 67 is fixedly installed at one end of the rectangular cable fixing plate 66. The cable fixing column 61 is L-shaped, and a limit rod 68 is embedded in the bottom of the cable fixing column 61. Two round holes are symmetrically opened at the top of the rectangular cable fixing plate 66. The center line of the limit rod 68 and the round holes coincide. The limit rod 68 is conical in shape, and the bottom diameter of the limit rod 68 is smaller than the top diameter, which facilitates the connection between the limit rod 68 and the rectangular cable fixing plate 66 and changes the connection difficulty between the two.

[0027] Work process: First, pull the horizontal adjustment beam 510 upward. The horizontal adjustment beam 510 moves upward, causing the synchronous adjustment connecting plate 57 and the cable fixing column 61 to move upward together. The synchronous adjustment connecting plate 57 moves upward, causing the groove at its bottom to separate from the top of the L-shaped mounting bracket 56 and the positioning fixing plate 55, thus releasing the lock on the mounting adjustment base plate 51. At the same time, the cable fixing column 61 moves upward, causing the limit rod 68 to exit from a round hole in the rectangular cable fixing plate 66, thus releasing the lock on the cable slide bracket 65. Then, pull the installation adjustment base plate 51 outward (or directly pull the main transformer winding core unit 4). The installation adjustment base plate 51 drives the main transformer winding core unit 4 to move outward as a whole. During this process, the guide rail slide bar 52 slides smoothly along the installation positioning column 53, and the round rod 54 rolls on the bottom plate of the equipment box 1, making the movement effortless and smooth. The main transformer winding core unit 4 moves from the initial "first position" (stored deep inside the box) to the "second position" (closer to the cabinet door for easy operation). As the main transformer winding core unit 4 moves outward, the cables connected to the voltage monitoring instrument unit 2 and other components are pulled out. These cables are coiled in an orderly manner and constrained in the cable storage frame 67, with their two ends connected to the electrical interfaces (such as the voltage monitoring instrument unit 2) on the main transformer winding core unit 4 and the equipment chassis 1, respectively. In the initial first position, the main redundant part of the cable forms an inward U-shaped fold within the cable storage frame 67. When the main transformer winding core unit 4 moves to the second position, the U-shaped fold is straightened and gradually transforms into an outward fold. During this process, the cable is orderly pulled out from the cable storage frame 67, thereby driving the cable storage frame 67 and the rectangular cable fixing plate 66 fixed thereto to move outward together. This causes the cable slide bracket 65 to slide synchronously along the cable positioning block 63. This design ensures that the cable length and transformer unit displacement are automatically matched, and the transformation of its folding shape is always guided and constrained by the cable storage frame 67, fundamentally preventing the cable from becoming disorderly tangled, knotted, or excessively bent. When the main transformer winding core unit 4 reaches the predetermined "second position", the horizontal adjustment beam 510 is pushed down. The horizontal adjustment beam 510 descends, causing the synchronous adjustment connecting plate 57 to descend, so that the groove at its bottom re-engages into the top of the L-shaped mounting bracket 56 and the positioning fixing plate 55, thereby firmly locking the mounting adjustment base plate 51. At the same time, the cable fixing column 61 descends, and the limiting rod 68 on it is inserted into another corresponding round hole on the rectangular cable fixing plate 66, locking the position of the cable slide bracket 65. At this point, the transformer unit is in a stable and safe unfolded working state, and the operator can easily carry out wiring operations. After the operation is completed, reverse the above operation (first lift the horizontal adjustment beam 510 to unlock, then push the main transformer winding core unit 4 back into the box, and finally push the horizontal adjustment beam 510 down to lock), and the equipment can be restored to a compact transport and storage state. The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A portable transformer for power engineering construction, characterized in that, include: Equipment chassis (1), voltage monitoring instrument unit (2) installed on the side of equipment chassis (1), movable casters (3) installed at the four corners of the bottom of equipment chassis (1), and main transformer winding core unit (4) installed inside equipment chassis (1). The portable transformer for power engineering construction also includes a positioning adjustment mechanism (5) and a line positioning component (6); The installation positioning adjustment mechanism (5) is installed between the equipment chassis (1) and the main transformer winding core unit (4), and the line positioning component (6) is connected between the installation positioning adjustment mechanism (5) and the inner wall of the equipment chassis (1).

2. A portable transformer for power engineering construction according to claim 1, characterized in that, The installation positioning adjustment mechanism (5) includes an installation adjustment base plate (51) fixedly installed at the bottom of the main transformer winding core unit (4). The bottom of the installation adjustment base plate (51) is symmetrically equipped with guide rails (52), and the guide rails (52) are slidably connected to the inside of the equipment chassis (1). The inside of the guide rails (52) is connected through an installation positioning column (53). The two ends of the installation positioning column (53) are fixedly connected to the inside of the equipment chassis (1). The bottom of the installation adjustment base plate (51) is equidistantly rotatably connected with a round rod (54), and the outer surface of the round rod (54) is in contact with the bottom of the inner wall of the equipment chassis (1).

3. A portable transformer for power engineering construction according to claim 2, characterized in that, One end of the mounting adjustment base plate (51) is symmetrically fixedly mounted with a positioning fixing plate (55). The end of the positioning fixing plate (55) away from the mounting adjustment base plate (51) is fixedly mounted with an L-shaped mounting bracket (56). The top ends of the two positioning fixing plates (55) are fitted with the same synchronous adjustment connecting plate (57). The top ends of the synchronous adjustment connecting plate (57) are symmetrically fixedly mounted with telescopic positioning sleeves (58). The top ends of the telescopic positioning sleeves (58) are fixedly mounted with locking fixing blocks (59). The end of the locking fixing block (59) away from the mounting adjustment base plate (51) is fixedly connected to the inner wall of the equipment chassis (1).

4. A portable transformer for power engineering construction according to claim 2, characterized in that, The top length and width of the L-shaped mounting bracket (56) and the positioning fixing plate (55) are equal. The bottom end of the synchronous adjustment connecting plate (57) is provided with a groove, the length and width of which are equal to the top length and width of the positioning fixing plate (55).

5. A portable transformer for power engineering construction according to claim 4, characterized in that, A buffer pad is bonded inside the groove of the positioning and fixing plate (55). The end of the synchronous adjustment connecting plate (57) near the positioning and fixing plate (55) has a rounded corner. A horizontal adjustment beam (510) is fixedly installed on one side of the synchronous adjustment connecting plate (57).

6. A portable transformer for power engineering construction according to claim 1, characterized in that, The line positioning component (6) includes a cable bracket mounting plate (64) fixedly installed inside the equipment chassis (1). A cable positioning block (63) is fixedly installed at one end of the cable bracket mounting plate (64) near the main transformer winding core unit (4). A cable slide bracket (65) is sleeved on the outside of the cable positioning block (63). A rectangular cable fixing plate (66) is fixedly installed at one end of the cable slide bracket (65) near the main transformer winding core unit (4). A cable storage frame (67) is fixedly installed at one end of the rectangular cable fixing plate (66).

7. A portable transformer for power engineering construction according to claim 5, characterized in that, The top of the horizontal adjusting beam (510) is fixedly installed with a cable fixing column (61). The cable fixing column (61) has a guide groove (62) at one end away from the main transformer winding core unit (4). The cable bracket mounting plate (64) has a protrusion welded to one end, and the protrusion is slidably connected inside the guide groove (62).

8. A portable transformer for power engineering construction according to claim 7, characterized in that, The cable fixing column (61) is L-shaped, and a limit rod (68) is embedded in the bottom of the cable fixing column (61). Two round holes are symmetrically opened at the top of the rectangular cable fixing plate (66).

9. A portable transformer for power engineering construction according to claim 8, characterized in that, The center line of the limiting rod (68) coincides with the center line of the circular hole. The limiting rod (68) is conical in shape, and the bottom diameter of the limiting rod (68) is smaller than the top diameter.

10. A portable transformer for power engineering construction according to claim 3, characterized in that, The telescopic positioning sleeve (58) is composed of a sleeve and a cylinder, with the center lines of the sleeve and the cylinder coinciding, wherein the cylinder is slidably connected inside the sleeve.

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