An electric power transformer for urban rail transit

Abstract

The invention discloses an electric power transformer for urban rail transit, comprising an electric power transformer and an electric pole, wherein two I-beams are fixedly connected to the bottom of the electric power transformer, and the two I-beams are symmetrically arranged on the left and right, a box is arranged between the two I-beams, and rectangular grooves are opened on the left and right sides of the box. The invention can realize that when outdoor rainwater accumulates in the inner cavity of the protective cover, the lifting plate can be moved downward through the mutual cooperation among the fourth spring, the push plate, the horizontal plate, the triangular plate, the vertical rod, the flip plate, the central axis, the lifting plate, the first spring, the bottom rod, the pull rope and other components, when the outdoor rainwater accumulates in the inner cavity of the protective cover, the lifting plate can be restored to move the push plate through the pull rope when the rainwater is discharged, and when the push plate moves, the impurities precipitated in the transformer oil can be cleared, and it can be identified that there are many impurities in the current transformer oil, and the starter is triggered to shut down the electric power transformer to prevent the stability and safety of the electric power system from being threatened.

Description

Technical Field

[0001] The present invention relates to the technical field of power electrical transformers, and specifically to a power electrical transformer for urban rail transit. Background Art

[0002] Power electrical transformers in rail transit systems are responsible for converting the high-voltage alternating current provided by the power supply network into appropriate low-voltage electrical energy required by vehicles and systems. By accurately adjusting the output voltage, the transformer ensures the stability of the power system, thus guaranteeing the normal operation of transportation vehicles. By improving the efficiency of electrical energy transmission, the application of transformers in rail transit effectively reduces energy costs and contributes to the realization of green and sustainable urban transportation.

[0003] During the use of distribution transformers, various problems may occur. These problems not only affect the normal operation of the transformer but also pose threats to the stability and safety of the power system. When the oil seal of the transformer ages, it may lead to leakage at the weld of the transformer. When the transformer leaks oil, it will destroy its fully sealed state, expose the oil-paper insulation to air and moisture, resulting in a reduction in insulation performance and accelerating insulation aging. Summary of the Invention

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An electrical transformer for urban rail transit, comprising a power transformer and a utility pole. Two I-beams are fixedly connected to the bottom of the power transformer, and the two I-beams are symmetrically arranged left and right. There is a box body between the two I-beams. Rectangular grooves are opened on both the left and right sides of the box body. A bidirectional threaded rod is arranged in the inner cavity of the rectangular groove. The top end of the bidirectional threaded rod is inserted into the top of the inner cavity of the rectangular groove, and the bottom end of the bidirectional threaded rod penetrates through the bottom of the inner cavity of the rectangular groove. Two clamping plates are threadedly connected to the outer side of the bidirectional threaded rod, and the two clamping plates are symmetrically arranged up and down. The side of the two clamping plates facing away from each other is attached to the I-beam. A strip-shaped opening is opened at the center of the top of the box body, and the strip-shaped opening is located below the weld at the bottom of the power transformer. Two limiting plates are fixedly connected to the top of the box body, and the two limiting plates are symmetrically arranged front and back. A moving block is slidably connected to the top of the limiting plate at the rear side, and a translation block is slidably connected to the top of the limiting plate at the front side. A seal is fixedly connected to the top of the moving block near the left side. An installation opening is opened in the inner cavity of the moving block, and an installation plate is fixedly connected to the inner cavity of the installation opening. A movable rod penetrates through the inner cavity of the installation plate. The front end of the movable rod is fixedly connected to a reciprocating plate. The front side of the reciprocating plate penetrates through the installation opening. A third spring is sleeved on the outer side of the movable rod. The rear end of the third spring is fixedly connected to the installation plate, and the front end of the third spring is fixedly connected to the rear side of the reciprocating plate. A fixed rod is fixedly connected to the top of the reciprocating plate near the front side. A fitting rod is fixedly connected to the rear side of the translation block. A second spring is fixedly connected to the right side of the moving block. A fixing plate is fixedly connected to the top of the limiting plate at the rear side near the right side, and the right end of the second spring is fixedly connected to the fixing plate. A cylinder is fixedly connected to the right side of the translation block, and the cylinder is installed on the limiting plate at the front side. An L-shaped connecting rod is fixedly connected to the front side of the limiting plate at the rear side near the right side, and the other end of the L-shaped connecting rod is fixedly connected to a tapered plate.

[0006] Preferably, the utility pole is located at the rear side of the power transformer. Two mounting sleeves are sleeved on the outer side of the utility pole, and the two mounting sleeves are symmetrically arranged up and down. The rear side of the power transformer is fixedly connected to the upper mounting sleeve. Oblique plates are fixedly connected to the bottoms of the two I-beams, and the rear sides of the two oblique plates are fixedly connected to the lower mounting sleeve.

[0007] Preferably, a filter screen is arranged near the top of the inner cavity of the box body. The left and right sides of the filter screen are fixedly connected to the inner side wall of the box body. Slots are opened near the left and right sides of the inner cavity of the box body. Sliders are arranged in the inner cavities of the two slots. A return spring is fixedly connected to the bottom of the slider, and the bottom end of the return spring is fixedly connected to the bottom of the inner cavity of the slot. A reciprocating box is fixedly connected between the two sliders.

[0008] Preferably, discharge ports are formed at the bottom of the reciprocating box near both left and right sides. Two opening and closing doors are installed at the center of the bottom of the reciprocating box. Trapezoidal blocks are fixedly connected to the bottom of the reciprocating box near both left and right sides. A trigger is fixedly connected to the right side of the inner cavity of the box body. Two ejector rods are fixedly connected to the bottom of the inner cavity of the box body, and the two ejector rods are symmetrically arranged left and right. Two guide plates are fixedly connected to the bottom of the inner cavity of the box body. The top ends of the two triggers penetrate through the adjacent guide plates respectively. The ejector rods are located below the opening and closing doors.

[0009] Preferably, a plurality of discharge ports are formed at the bottom of the box body. The plurality of discharge ports are linearly arranged in sequence from left to right. A plurality of limiting ports are formed at the bottom of the front side of the box body. The plurality of limiting ports are communicated with the adjacent discharge ports. A water baffle is movably connected to the inner cavity of the discharge port. The front side of the water baffle extends into the inner cavity of the limiting port. A linkage block is fixedly connected to the top of the water baffle near the rear side. A collection box is fixedly connected to the bottom of the box body. The plurality of discharge ports are communicated with the inner cavity of the collection box.

[0010] Preferably, a push plate is fixedly connected to the rear sides of the plurality of linkage blocks together. A plurality of fourth springs are fixedly connected to the rear side of the push plate. The plurality of fourth springs are linearly arranged in sequence from left to right. An installation groove is formed in the front side of the push plate. A cross plate is fixedly connected to the inner cavity of the installation groove. Two vertical rods penetrate through the inner cavity of the cross plate. The bottom ends of the two vertical rods are fixedly connected with a triangular plate together. A trigger switch is fixedly connected to the center of the bottom of the cross plate. An actuator is arranged at the bottom of the front side of the inner cavity of the box body.

[0011] Preferably, protective covers are fixedly connected to the front sides of the two I-beams. A lifting plate is attached to the inner cavity of the protective cover near the top. Two turning plates are arranged in the inner cavity of the lifting plate. A central shaft penetrates through the center of the inner cavity of the lifting plate. The bottom end of the central shaft is fixedly connected to the bottom of the inner cavity of the protective cover. A first spring is sleeved on the outer side of the central shaft. The top end of the first spring is fixedly connected to the bottom of the lifting plate. The bottom end of the first spring is fixedly connected to the bottom of the inner cavity of the protective cover. Two bottom rods are fixedly connected to the bottom of the inner cavity of the protective cover. Two water outlet ports are formed at the bottom of the inner cavity of the protective cover. A pull rope is fixedly connected to the bottom of the lifting plate. The bottom end of the pull rope penetrates through the water outlet port. The other end of the pull rope penetrates through the inner cavity of the box body and is fixedly connected to the front side of the push plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The present invention can realize that when outdoor rainwater accumulates in the inner cavity of the protective cover, the lifting plate can be moved downward through the mutual cooperation between the fourth spring, the push plate, the horizontal plate, the triangular plate, the vertical rod, the flip plate, the central axis, the lifting plate, the first spring, the bottom rod, the pull rope and other components. When the rainwater is discharged, the lifting plate can be restored to move the push plate through the pull rope. When the push plate moves, the impurities precipitated in the transformer oil can be removed, and it can be identified that there are many impurities in the current transformer oil, triggering the starter to shut down the power transformer to prevent the stability and safety of the power system from being threatened.

[0014] 2. The present invention can realize that when the power transformer is detected to be leaking oil, the cylinder can be started to drive the sealer to move and the weld at the bottom of the power transformer can be repaired to prevent further affecting the sealing state of the power transformer, affecting the service life of the power transformer, and increasing the workload of operation and maintenance through the mutual cooperation between the cylinder, the translation block, the second spring, the moving block, the sealer, the limit plate, the reciprocating plate, the fixed rod, the third spring, the mounting plate, the movable rod, the fixed plate, the conical plate, the L-shaped connecting rod and other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a bottom view of the structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the component box structure of the present invention;

[0018] Figure 4 This is a schematic diagram of the reciprocating box structure of the present invention;

[0019] Figure 5 This is a schematic diagram of the structure of the limiting plate component of the present invention;

[0020] Figure 6 It is a schematic diagram of the push plate structure of the component of the present invention.

[0021] Reference numerals in the figure: 1, power transformer; 2, I-beam; 3, utility pole; 4, mounting sleeve; 5, inclined plate; 6, guy rope; 7, protective cover; 8, collection box; 9, vertical rod; 10, bottom rod; 11, first spring; 12, lifting plate; 13, central axis; 14, turning plate; 15, deflector; 16, trigger; 17, L-shaped connecting rod; 18, conical plate; 19, fixing plate; 20, limiting plate; 21, second spring; 22, seal; 23, moving block; 24, reciprocating plate; 25, translation block; 26, bidirectional threaded rod; 27, clamping plate; 28, triangular plate; 29, filter screen; 30, trapezoidal block; 31, ejector rod; 32, water baffle; 33, linkage block; 34, fitting rod; 35, mounting plate; 36, third spring; 37, movable rod; 38, fixed rod; 39, cylinder; 40, fourth spring; 41, push plate; 42, cross plate; 43, box body; 44, reciprocating box. Detailed implementation manners

[0022] Please refer to Figure 1-6 , the present invention provides a technical solution:

[0023] A power transformer for urban rail transit, comprising a power transformer 1 and a pole 3, wherein two I-beams 2 are fixedly connected to the bottom of the power transformer 1, and the two I-beams 2 are symmetrically arranged, a box 43 is arranged between the two I-beams 2, and rectangular grooves are opened on both sides of the box 43, and a bidirectional threaded rod 26 is arranged in the inner cavity of the rectangular groove, and the top of the bidirectional threaded rod 26 is inserted in the top of the inner cavity of the rectangular groove, and the bottom of the bidirectional threaded rod 26 passes through the bottom of the inner cavity of the rectangular groove, and the outer side of the bidirectional threaded rod 26 is threadedly connected to two clamping plates 27, and the two clamping plates 27 are symmetrically arranged up and down, and the two clamping plates 27 are arranged in a vertical direction. The opposite sides are both fitted with the I-beam 2, a strip opening is opened at the center of the top of the box body 43, and the strip opening is located below the weld at the bottom of the power transformer 1. Two limit plates 20 are fixedly connected to the top of the box body 43, and the two limit plates 20 are symmetrically arranged front and back. A moving block 23 is slidably connected to the top of the limit plate 20 located on the rear side, and a translation block 25 is slidably connected to the top of the limit plate 20 located on the front side. A sealer 22 is fixedly connected to the top of the moving block 23 near the left side, and an installation opening is opened in the inner cavity of the moving block 23. A mounting plate 35 is fixedly connected to the inner cavity of the installation opening, and a movable rod 37 is passed through the inner cavity of the mounting plate 35. The front end of the movable rod 37 is fixedly connected to the reciprocating plate 24, the front side of the reciprocating plate 24 passes through the mounting port, the outer side of the movable rod 37 is sleeved with a third spring 36, the rear end of the third spring 36 is fixedly connected to the mounting plate 35, the front end of the third spring 36 is fixedly connected to the rear side of the reciprocating plate 24, the top of the reciprocating plate 24 near the front side is fixedly connected to the fixing rod 38, the rear side of the translation block 25 is fixedly connected to the fitting rod 34, the right side of the moving block 23 is fixedly connected to the second spring 21, the top of the limiting plate 20 located at the rear side is fixedly connected to the fixing plate 19 near the right side, and the right end of the second spring 21 is fixedly connected to the fixing plate 19 A cylinder 39 is fixedly connected to the right side of the translation block 25, and the cylinder 39 is installed on the limit plate 20 located on the front side. An L-shaped connecting rod 17 is fixedly connected to the front side of the limit plate 20 located on the rear side near the right side, and a conical plate 18 is fixedly connected to the other end of the L-shaped connecting rod 17. The electric pole 3 is located on the rear side of the power transformer 1, and two mounting sleeves 4 are sleeved on the outer side of the electric pole 3, and the two mounting sleeves 4 are symmetrically arranged up and down. The rear side of the power transformer 1 is fixedly connected to the mounting sleeve 4 located above, and the bottoms of the two I-beams 2 are fixedly connected to the inclined plates 5, and the rear sides of the two inclined plates 5 are fixedly connected to the mounting sleeve 4 located below.

[0024] There is a filter screen 29 near the top of the inner cavity of the box body 43. Both the left and right sides of the filter screen 29 are fixedly connected to the inner side walls of the box body 43. Slots are provided near the left and right sides of the inner cavity of the box body 43. Sliders are arranged in the inner cavities of the two slots. The bottom of the slider is fixedly connected with a return spring, and the bottom end of the return spring is fixedly connected to the bottom of the inner cavity of the slot. A reciprocating box 44 is fixedly connected between the two sliders. Discharge ports are provided near the left and right sides of the bottom of the reciprocating box 44. Two opening and closing doors are installed at the center of the bottom of the reciprocating box 44. Trapezoidal blocks 30 are fixedly connected near the left and right sides of the bottom of the reciprocating box 44. A trigger 16 is fixedly connected to the right side of the inner cavity of the box body 43. Two ejector rods 31 are fixedly connected to the bottom of the inner cavity of the box body 43, and the two ejector rods 31 are symmetrically arranged left and right. Two flow guide plates 15 are fixedly connected to the bottom of the inner cavity of the box body 43. The top ends of the two triggers 16 penetrate through the adjacent flow guide plates 15. The ejector rods 31 are located below the opening and closing doors. A number of discharge ports are provided at the bottom of the box body 43, and the number of discharge ports are linearly arranged in sequence from left to right. A number of limit ports are provided near the bottom of the front side of the box body 43, and the number of limit ports are all communicated with the adjacent discharge ports. A water baffle 32 is movably connected to the inner cavity of the discharge port. The front side of the water baffle 32 extends into the inner cavity of the limit port. A linkage block 33 is fixedly connected to the rear side near the top of the water baffle 32. A collection box 8 is fixedly connected to the bottom of the box body 43, and the number of discharge ports are all communicated with the inner cavity of the collection box 8. A push plate 41 is fixedly connected to the rear sides of the number of linkage blocks 33. A number of fourth springs 40 are fixedly connected to the rear side of the push plate 41, and the number of fourth springs 40 are linearly arranged in sequence from left to right. An installation groove is provided on the front side of the push plate 41. A cross plate 42 is fixedly connected to the inner cavity of the installation groove. Two vertical rods 9 penetrate through the inner cavity of the cross plate 42. A triangular plate 28 is fixedly connected to the bottom ends of the two vertical rods 9. A trigger switch is fixedly connected to the center of the bottom of the cross plate 42. An actuator is arranged near the bottom of the front side of the inner cavity of the box body 43. Protective covers 7 are fixedly connected to the front sides of the two I-beams 2. A lifting plate 12 is attached to the inner cavity near the top of the protective cover 7. Two turning plates 14 are arranged in the inner cavity of the lifting plate 12. A central shaft 13 penetrates through the center of the inner cavity of the lifting plate 12. The bottom end of the central shaft 13 is fixedly connected to the bottom of the inner cavity of the protective cover 7. A first spring 11 is sleeved on the outer side of the central shaft 13. The top end of the first spring 11 is fixedly connected to the bottom of the lifting plate 12. The bottom end of the first spring 11 is fixedly connected to the bottom of the inner cavity of the protective cover 7. Two bottom rods 10 are fixedly connected to the bottom of the inner cavity of the protective cover 7. Two water outlets are provided at the bottom of the inner cavity of the protective cover 7. A pull rope 6 is fixedly connected to the bottom of the lifting plate 12. The bottom end of the pull rope 6 penetrates through the water outlet. The other end of the pull rope 6 penetrates through the inner cavity of the box body 43 and is fixedly connected to the front side of the push plate 41.

[0025] Working principle: When oil leaks from the bottom weld of the power transformer 1, it can enter the inner cavity of the box body 43 through the strip-shaped opening at the top of the box body 43 and flow into the inner cavity of the reciprocating box 44 for accumulation. When the accumulated amount of transformer oil is relatively large, it can drive the reciprocating box 44 to move downward and contact the trigger 16. When the trigger 16 is triggered, the cylinder 39 can be started. The cylinder 39 can drive the translation block 25 to move to the right through the power output shaft. When the translation block 25 moves to the right, it can contact the reciprocating plate 24 through the fitting rod 34 and drive the moving block 23 to move to the right. When the moving block 23 moves to the right, it can drive the sealer 22 to move, thereby repairing the weld at the bottom of the power transformer 1, preventing further impact on the sealing state of the power transformer 1, affecting the service life of the power transformer 1, increasing the workload of operation and maintenance. When the reciprocating plate 24 contacts the conical plate 18, the reciprocating plate 24 can move backward, thus disengaging from the contact with the fitting rod 34, and then restoring its position under the action of the second spring 21. When the reciprocating box 44 continues to move downward, the opening and closing doors inside the reciprocating box 44 can contact the two ejector rods 31, causing the two opening and closing doors to flip towards each other, flipping the transformer oil so that the transformer oil flows into the inner cavity of the discharge port and contacts the diversion plate 15. When the transformer accumulates inside the box body 43, if there are impurities in the transformer oil, they will accumulate at the bottom of the inner cavity of the box body 43. When outdoor rainwater accumulates on the surface of the flipping plate 14, it can cause the flipping plate 14 to move downward and contact the bottom rod 10, causing the two flipping plates 14 to flip, so that the rainwater on the surface of the lifting plate 12 flows out. When the rainwater on the surface of the lifting plate 12 flows out, under the action of the first spring 11, the lifting plate 12 can move upward and move upward through the pull rope 6. When the pull rope 6 moves upward, it can pull the push plate 41 to move forward. When the push plate 41 moves forward, if there are impurities at the bottom of the box body 43, they will accumulate at the bottom of the triangular plate 28 and cause the triangular plate 28 to move slightly upward, triggering the starter, and the starter will turn off the power transformer 1 to prevent threats to the stability and safety of the power system. When the push plate 41 moves forward, by being fixedly connected to a number of linkage blocks 33, it can drive the linkage blocks 33 and the water baffle 32 to move forward, allowing the transformer oil to flow into the inner cavity of the collection box 8.

Claims

1. A power transformer for urban rail transit, comprising a power transformer (1) and a utility pole (3), characterized in that: The bottom of the power transformer (1) is fixedly connected to two I-beams (2), and the two I-beams (2) are symmetrically arranged. A box (43) is provided between the two I-beams (2). The box (43) is provided with rectangular grooves on both sides. The inner cavity of the rectangular groove has a bidirectional threaded rod (26). The top end of the bidirectional threaded rod (26) is inserted into the top of the inner cavity of the rectangular groove. The bottom end of the bidirectional threaded rod (26) passes through the bottom of the inner cavity of the rectangular groove. The outer side of the bidirectional threaded rod (26) is threadedly connected to two clamping plates (27). The two clamping plates (27) are symmetrically arranged up and down. The two sides of the two clamping plates (27) that are separated from each other are both in contact with the I-beam (2). A strip opening is provided at the center of the top of the box body (43), and the strip opening is located below the bottom weld of the power transformer (1). Two limit plates (20) are fixedly connected to the top of the box body (43), and the two limit plates (20) are symmetrically arranged front and back. A moving block (23) is slidably connected to the top of the limit plate (20) located at the rear side, and a translation block (25) is slidably connected to the top of the limit plate (20) located at the front side. A sealer (22) is fixedly connected to the top of the moving block (23) near the left side. An installation opening is provided in the inner cavity of the moving block (23), and a mounting plate (35) is fixedly connected to the inner cavity of the installation opening. A movable rod is provided through the inner cavity of the mounting plate (35). (37), the front end of the movable rod (37) is fixedly connected to the reciprocating plate (24), the front side of the reciprocating plate (24) passes through the mounting opening, the outer side of the movable rod (37) is sleeved with a third spring (36), the rear end of the third spring (36) is fixedly connected to the mounting plate (35), the front end of the third spring (36) is fixedly connected to the rear side of the reciprocating plate (24), the top of the reciprocating plate (24) near the front side is fixedly connected to a fixed rod (38), the rear side of the translation block (25) is fixedly connected to a fitting rod (34), the right side of the moving block (23) is fixedly connected to a second spring (21), and the top of the limit plate (20) located at the rear side is fixedly connected to a fixed The right end of the second spring (21) is fixedly connected to the fixed plate (19); the right side of the translation block (25) is fixedly connected to a cylinder (39); the cylinder (39) is installed on a limit plate (20) located at the front side; the front side of the limit plate (20) located at the rear side is fixedly connected to an L-shaped connecting rod (17) near the right side; the other end of the L-shaped connecting rod (17) is fixedly connected to a conical plate (18); the inner cavity of the box body (43) is provided with slots near the left and right sides; the inner cavities of the two slots are provided with sliders; a reciprocating box (44) is fixedly connected between the two sliders; and the right side of the inner cavity of the box body (43) is fixedly connected to a trigger (16).

2. The power transformer for urban rail transit according to claim 1, characterized in that: The utility pole (3) is located at the rear side of the power transformer (1), two mounting sleeves (4) are sleeved on the outer side of the utility pole (3), and the two mounting sleeves (4) are symmetrically arranged up and down, the rear side of the power transformer (1) is fixedly connected to the mounting sleeve (4) located at the top, the bottoms of the two I-beams (2) are fixedly connected to inclined plates (5), and the rear sides of the two inclined plates (5) are fixedly connected to the mounting sleeve (4) located at the bottom.

3. The power transformer for urban rail transit according to claim 1, characterized in that: A filter screen (29) is provided near the top of the inner cavity of the box body (43), and the left and right sides of the filter screen (29) are fixedly connected to the inner wall of the box body (43). A return spring is fixedly connected to the bottom of the slider, and the bottom end of the return spring is fixedly connected to the bottom of the slotted inner cavity.

4. The power transformer for urban rail transit according to claim 3, characterized in that: The bottom of the reciprocating box (44) is provided with discharge ports near the left and right sides. Two opening and closing doors are installed at the center of the bottom of the reciprocating box (44). The bottom of the reciprocating box (44) is fixedly connected with trapezoidal blocks (30) near the left and right sides. The bottom of the inner cavity of the box body (43) is fixedly connected with two push rods (31), and the two push rods (31) are symmetrically arranged on the left and right. The bottom of the inner cavity of the box body (43) is fixedly connected with two guide plates (15). The top ends of the two triggers (16) penetrate the adjacent guide plates (15), and the push rods (31) are located below the opening and closing doors.

5. The power transformer for urban rail transit according to claim 4, characterized in that: The bottom of the box body (43) is provided with a plurality of discharge openings, which are linearly arranged from left to right. The front side of the box body (43) near the bottom is provided with a plurality of limit openings, which are mutually interpenetrating with adjacent discharge openings. The inner cavity of the discharge opening is movably connected with a water baffle (32), the front side of the water baffle (32) extends to the inner cavity of the limit opening, the top of the water baffle (32) near the rear side is fixedly connected with a linkage block (33), the bottom of the box body (43) is fixedly connected with a collection box (8), and the plurality of discharge openings are mutually interpenetrating with the inner cavity of the collection box (8).

6. The power transformer for urban rail transit according to claim 5, characterized in that: A push plate (41) is fixedly connected to the rear side of the plurality of linkage blocks (33), and a plurality of fourth springs (40) are fixedly connected to the rear side of the push plate (41). The plurality of fourth springs (40) are linearly arranged from left to right. A mounting groove is provided on the front side of the push plate (41), and a horizontal plate (42) is fixedly connected to the inner cavity of the mounting groove. Two vertical rods (9) are passed through the inner cavity of the horizontal plate (42), and a triangular plate (28) is fixedly connected to the bottom ends of the two vertical rods (9). A trigger switch is fixedly connected to the center of the bottom of the horizontal plate (42), and a starter is provided near the bottom of the inner cavity of the box body (43).

7. The power transformer for urban rail transit according to claim 6, characterized in that: The front sides of the two I-beams (2) are fixedly connected to a protective cover (7), a lifting plate (12) is attached to the inner cavity of the protective cover (7) near the top, the inner cavity of the lifting plate (12) is provided with two flip plates (14), a central shaft (13) is passed through the center of the inner cavity of the lifting plate (12), the bottom end of the central shaft (13) is fixedly connected to the bottom of the inner cavity of the protective cover (7), a first spring (11) is sleeved on the outer side of the central shaft (13), and the top end of the first spring (11) is connected to the inner cavity of the protective cover (7). The bottom of the lifting plate (12) is fixedly connected, the bottom end of the first spring (11) is fixedly connected to the bottom of the inner cavity of the protective cover (7), the bottom of the inner cavity of the protective cover (7) is fixedly connected to two bottom rods (10), the bottom of the inner cavity of the protective cover (7) is provided with two water outlets, the bottom of the lifting plate (12) is fixedly connected to a pull rope (6), the bottom end of the pull rope (6) passes through the water outlet, the other end of the pull rope (6) passes through the inner cavity of the box body (43), and is fixedly connected to the front side of the push plate (41).

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