A protective device for the bottom of a dry-type transformer

Abstract

The present invention discloses a protective device for the bottom of a dry-type transformer, which relates to the technical field of dry-type transformers and includes a base and a support seat for supporting a transformer box. The four corners of the top surface of the base are fixedly mounted with lifting legs, the tops of the lifting legs are fixedly connected with support blocks, the support seat is arranged between the four lifting legs, the four corners of the top surface of the support seat are fixedly connected with positioning blocks that are engaged with the support blocks, a groove is formed in the middle of the top surface of the support seat, and the transformer box is placed in the groove. The liquid level sensor installed on the side of the support seat of the present invention can realize the lifting of the support seat and the transformer box by the transmission of the liquid level sensor, so as to prevent the water level near the transformer box from rising and entering the support seat, thereby affecting the transformer box, and at the same time can improve the heat dissipation effect inside the transformer box.

Description

Technical Field

[0001] The present invention relates to the technical field of dry-type transformers, and in particular to a protective device for the bottom of a dry-type transformer. Background Art

[0002] Dry-type transformers are widely used in places such as local lighting, high-rise buildings, airports, docks, CNC machinery and equipment. Simply put, a dry-type transformer refers to a transformer whose core and windings are not immersed in insulating oil. Dry-type transformers need to be protected to ensure their normal use. When using outdoor dry-type transformers, it is necessary to consider the factor of collision with foreign objects. Most existing dry-type transformers have enhanced their own strength, which is not only difficult to design and has high manufacturing costs. In addition, they are easily damaged after collision, resulting in operational failures of dry-type transformers and poor anti-collision capabilities, which cannot meet the use requirements of dry-type transformers.

[0003] To protect dry-type transformers, protective devices are often used to assist with their installation. For example, the dry-type transformer protective device disclosed in application publication number CN115172009A includes a dry-type transformer body, a protective base mounted at the bottom of the body, a mounting plate disposed at the bottom of the base, a shock-absorbing mechanism fixedly mounted between the base and the mounting plate, and evenly distributed limiting rods fixedly mounted on the dry-type transformer body. By installing the shock-absorbing mechanism at the bottom of the dry-type transformer, the device mitigates impact forces on the dry-type transformer, enhancing its protection.

[0004] However, the above-mentioned protective devices have poor heat dissipation effects on the dry-type transformer. On the other hand, in rainy weather, rainwater accumulates under the dry-type transformer, which can easily cause water vapor to enter the transformer box, affecting the normal use of the transformer. In addition, the buffering and shock absorption effect of the dry-type transformer in a specific working environment must also be considered.

[0005] Therefore, a protective device for the bottom of a dry-type transformer is needed to solve the above technical problems. Summary of the Invention

[0006] The present invention provides a protective device for the bottom of a dry-type transformer to solve the problems in the above-mentioned background technology.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A protective device for the bottom of a dry-type transformer, comprising a base for supporting a transformer box and a support base, wherein lifting legs are fixedly mounted at the four corners of the top surface of the base, a groove is formed in the middle of the top surface of the support base, the transformer box is placed in the groove, and a sealing outer frame is clamped at the top of the groove to seal the gap between the outer wall of the transformer box and the inner wall of the groove, an air inlet pipe communicating with the top of the transformer box is provided at the bottom end of the side surface of the support base, a liquid level sensor is embedded in the top ends of the other two side surfaces of the support base, and a first one-way valve is provided on both sides of the liquid level sensor;

[0009] The transformer box is placed on the support plate, and two double-headed screws are provided in the groove below the support plate. The ends of the two double-headed screws are respectively rotatably installed in the inner wall of the groove. The ends of the two double-headed screws on the same side are commonly connected to a sliding "U"-shaped frame, and the top ends of the two sliding "U"-shaped frames pass through the support plate;

[0010] A first air storage part is provided between the sliding "U"-shaped frame and the inner wall of the support seat, a support column is provided under the support plate, a second air storage part is provided on the support column, the second air storage part is connected to the first air storage part through a connecting pipe, and a second one-way valve is provided on the air inlet pipe.

[0011] Preferably, the base is frame-shaped, and mounting holes are provided at the four corners of the top surface of the base.

[0012] Preferably, a positioning hole is provided in the center of the top surface of the support block, and a positioning column adapted to the positioning hole is connected in the center of the bottom surface of the positioning block.

[0013] Preferably, the top end of the lifting legs is fixedly connected to a support block, the support seat is arranged between the four lifting legs, and the four corners of the top surface of the support seat are fixedly connected to positioning blocks that are clamped with the support block.

[0014] Preferably, a convex block inserted into the side groove protrudes from the side surface of the support plate, and the convex block is slidably sleeved on the guide slide post, and a buffer spring is sleeved on the guide slide post below the convex block.

[0015] Preferably, the two symmetrical side walls of the groove of the support seat are provided with three side grooves in a linear array, a guide slide is installed in each of the side grooves, and a horizontally arranged support plate is connected between the multiple guide slides.

[0016] Preferably, a transmission member is connected between the middle parts of the two double-headed screws, the two double-headed screws rotate synchronously through the transmission member, and the end of one of the double-headed screws extends out of the base and is connected to a drive motor.

[0017] Preferably, both ends of the support plate are symmetrically provided with through grooves for the sliding "U"-shaped frame to slide.

[0018] Preferably, the sealing outer frame includes a first sealing rod and a second sealing rod that are clamped to each other, the first sealing rod and the second sealing rod are both "U"-shaped rods, and the two adjacent ends of the first sealing rod and the second sealing rod are in an "L"-shaped structure that are clamped to each other, the lower ends of the first sealing rod and the second sealing rod are inserted into the gap between the transformer box and the inner wall of the groove, and the upper ends of the first sealing rod and the second sealing rod extend outward to the top surface of the support seat.

[0019] Preferably, the inner side walls of the lower ends of the first sealing rod and the second sealing rod are both provided with frame-shaped grooves, and the frame-shaped grooves are filled with buffer pads.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. The present invention connects the interior of the support base with the top of the transformer box, so that the hot air in the transformer box enters the support base through the air intake pipe, which can effectively achieve the heat dissipation effect; at the same time, in conjunction with the liquid level sensor installed on the side of the support base, the liquid level sensor can transmit the water accumulation signal, so that the lifting legs can raise the support base and the transformer box, so as to prevent the water level near the transformer box from rising and entering the support base, affecting the use of the equipment inside the transformer box.

[0022] 2. The present invention can squeeze and release the first air storage part by sliding the "U"-shaped frame, so that the airflow stored in the first air storage part can flow in the second air storage part, thereby causing the second air storage part to expand or contract to adjust the up and down movement of the transformer box relative to the support seat seal, and then the hot air in the transformer box can be sucked into the support seat through the second one-way valve and the air inlet pipe, and then discharged to the outside of the support seat through the first one-way valve, thereby improving the heat dissipation effect inside the transformer box.

[0023] 3. The present invention controls the degree to which the sliding "U"-shaped frame squeezes the first air storage part, thereby controlling the amount of gas entering the second air storage part from the first air storage part, so that the second air storage part after intake and expansion can support and cushion the transformer box through the support plate. The expanded second air storage part and the buffer spring can jointly reduce shock and cushion the transformer box, which is more conducive to the stable operation of the transformer box.

[0024] 4. The present invention controls the sliding "U"-shaped frame to squeeze the first gas storage part, so that the gas pre-stored in the first gas storage part all enters the second gas storage part through the connecting pipe. After all the gas in the first gas storage part enters the second gas storage part and expands, it pushes the support plate upward to move upward. The support plate pushes the transformer box above it upward, so that the height of the transformer box is further increased, thereby delaying the time for external water to enter the transformer box and ensuring the normal operation of the transformer box to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the support base structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the base structure of the present invention;

[0028] Figure 4 is a cross-sectional view of the support seat of the present invention;

[0029] Figure 5 A cross-sectional view of the support base of the present invention from another perspective;

[0030] Figure 6 This is a schematic diagram of the sealing outer frame structure of the present invention;

[0031] Figure 7 This is a schematic structural diagram of the second sealing rod of the present invention;

[0032] Figure 8 It is a structural schematic diagram of the support column, the second gas storage portion and the support plate of the present invention.

[0033] In the figure: 1. Base; 2. Lifting legs; 3. Support seat; 4. Sealing outer frame; 5. Transformer box; 6. Support block; 7. Positioning socket; 8. Positioning block; 9. Inlet pipe; 10. Side groove; 11. Guide slide; 12. Support plate; 13. Double-headed screw; 14. Drive motor; 15. Sliding "U"-shaped frame; 16. First one-way valve; 17. Liquid level sensor; 18. Buffer spring; 19. Transmission part; 41. First sealing rod; 42. Second sealing rod; 43. Buffer pad; 20. Support column; 21. Second air storage unit; 22. Second one-way valve. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0036] First embodiment

[0037] Reference Figure 1-2A protective device for the bottom of a dry-type transformer comprises a base 1 and a support base 3 for supporting a transformer case 5. Lifting legs 2 are fixedly mounted at the four corners of the top surface of the base 1. The lifting legs 2 have built-in electric lifting columns. Support blocks 6 are fixedly connected to the tops of the lifting legs 2. The support base 3 is disposed between the four lifting legs 2. Positioning blocks 8, which engage with the support blocks 6, are fixedly connected to the four corners of the top surface of the support base 3. The lifting legs 2 support the support base 3 by means of the support blocks 6 and the positioning blocks 8. A groove is provided in the middle of the top surface of the support base 3. The transformer case 5 is placed in the groove. A sealing outer frame 4 is engaged at the top of the groove to seal the gap between the outer wall of the transformer case 5 and the inner wall of the groove, thereby preventing dust and rainwater from entering the interior of the support base 3 through the gap. An air inlet pipe 9 communicating with the top of the transformer case 5 is provided at the bottom side of the support base 3. The air inlet pipe 9 can transport hot air from the inside of the transformer case 5 to the interior of the support base 3. A liquid level sensor 17 is embedded in the top of the other two side surfaces of the support seat 3, and a first one-way valve 16 is provided on both sides of the liquid level sensor 17. A controller electrically connected to the liquid level sensor 17 and the lifting leg 2 is provided at the bottom of the groove of the support seat 3. The liquid level sensor 17 detects the water accumulation condition at the base 1. When the accumulated water is large and reaches the position of the liquid level sensor 17, the controller starts to control the electric telescopic column in the lifting leg 2 to extend, and lift the support seat 3 and the transformer box 5 upward to prolong the time for water to enter the transformer box and ensure the normal operation of the transformer box 5.

[0038] Reference Figure 3 The base 1 is frame-shaped, and mounting holes are provided at the four corners of the top surface of the base 1. Screws or anchor rods are inserted into the mounting holes of the base 1 to achieve fixation.

[0039] Reference Figure 2 and Figure 4 A positioning hole 7 is provided in the center of the top surface of the support block 6, and a positioning column adapted to the positioning hole 7 is connected in the center of the bottom surface of the positioning block 8. Multiple positioning columns are respectively inserted into the positioning holes 7 to realize the clamping and fixing of the support base 3, and it is also convenient to remove the support base 3.

[0040] Reference Figure 4 The two symmetrical side walls of the groove of the support seat 3 are each provided with three side grooves 10 in a linear array. A guide slide 11 is installed in each side groove 10. A horizontal support plate 12 is connected between the multiple guide slides 11. The transformer box 5 is placed on the support plate 12. The size of the transformer box 5 is smaller than the size of the groove of the support seat 3, so that the transformer box 5 can be adjusted on the support plate 12. The side of the support plate 12 has a protrusion that is inserted into the side groove 10, and the protrusion slides on the guide slide 11. A buffer spring 18 is sleeved on the guide slide 11 below the protrusion. When the support plate 12 supports the transformer box 5, the guide slide 11 and the buffer spring 18 can buffer and reduce shock to the transformer box 5.

[0041] Reference Figure 4-5 Two double-headed screws 13 are provided in the groove below the support plate 12. The ends of the two double-headed screws 13 are respectively rotatably mounted in the inner wall of the groove. A sliding "U"-shaped frame 15 is commonly connected to the ends of the two double-headed screws 13 on the same side. The top ends of the two sliding "U"-shaped frames 15 pass through the support plate 12. The two sliding "U"-shaped frames 15 can correct the position of the transformer box 5 when moving relative to each other, so that the transformer box 5 is in the middle position in the groove. A transmission member 19 is connected between the middle parts of the two double-headed screws 13. The two double-headed screws 13 rotate synchronously through the transmission member 19, and the end of one of the double-headed screws 13 extends out of the base 1 and is connected to the drive motor 14, so that the drive motor 14 drives the two double-headed screws 13 to rotate synchronously. Both ends of the support plate 12 are symmetrically provided with through grooves for the sliding "U"-shaped frames 15 to slide, so as to ensure the stable sliding of the sliding "U"-shaped frames 15.

[0042] Reference Figure 6-7 The sealing outer frame 4 includes a first sealing rod 41 and a second sealing rod 42 that are mutually engaged. The first sealing rod 41 and the second sealing rod 42 are both "U"-shaped rods, and the adjacent ends of the first sealing rod 41 and the second sealing rod 42 are in an "L"-shaped structure that is mutually engaged, which can make the two sealing rods fit more tightly, thereby better sealing the gap between the transformer box 5 and the inner wall of the groove. The lower ends of the first sealing rod 41 and the second sealing rod 42 are inserted into the gap between the transformer box 5 and the inner wall of the groove, and the upper ends of the first sealing rod 41 and the second sealing rod 42 extend outward to the top surface of the support seat 3 to achieve horizontal support for the first sealing rod 41 and the second sealing rod 42. The inner side walls of the lower ends of the first sealing rod 41 and the second sealing rod 42 are both provided with frame-shaped grooves, and the frame-shaped grooves are filled with buffer pads 43. The buffer pads 43 are made of elastic materials such as rubber or latex, which can be compressed when in contact with the transformer box 5, thereby making them fit more tightly with the transformer box 5 and achieving a better sealing effect. After the first sealing rod 41 , the second sealing rod 42 , and the buffer plate 43 are installed in place, sealing between the support base 3 and the transformer box 5 can be achieved.

[0043] When installing the transformer box 5, first place the base 1 at the installation position and fix the base 1 with bolts or anchor rods. Then place the support base 3 on top of the base 1 so that the positioning column at the bottom of the positioning block 8 on the support base 3 is inserted into the positioning socket 7 of the support frame at the top of the lifting leg 2 to complete the fixed placement of the support base 3. Then, place the transformer box 5 into the groove of the support base 3 and press it on the support plate 12. At this time, the support plate 12 moves downward under the pressure of the transformer box 5 and compresses the buffer spring 18. The rebound of the buffer spring 18 provides support for the transformer box 5. After the transformer box 5 is placed, control the drive motor 14 to work, and the drive motor 14 drives the double-headed screw 13 to rotate, and the transmission member 19 drives the other double-headed screw 13 to rotate accordingly. The two double-headed screws 13 rotate simultaneously, driving the two sliding "U"-shaped frames 15 to move in the opposite direction until the two sides of the transformer box 5 are respectively in contact with the two sliding "U"-shaped frames 15, completing the adjustment of the installation position of the transformer box 5. Then, the drive motor 14 is rotated in the opposite direction to make the sliding "U"-shaped frame 15 leave the transformer box 5, squeeze and insert the first sealing rod 41 of the sealing outer frame 4 between the transformer box 5 and the support seat 3, and then insert the second sealing rod 42 into the other end until the second sealing rod 42 contacts and fits with the first sealing rod 41. At this time, the first sealing rod 41 and the second sealing rod 42 fill the gap between the transformer box 5 and the inner wall of the groove, and the buffer pad 43 with an elastic effect is compressed when it contacts the transformer box 5, and then rebounds to further tighten the gap between the transformer box 5 and the inner wall of the groove.

[0044] After the transformer box 5 is installed, the hot air generated by the transformer in the transformer box 5 floats upward, enters the interior of the support base 3 through the air inlet pipe 9, and finally the dry air is discharged from the support base 3 through the first one-way valve 16.

[0045] At the same time, when the water level at the base 1 gradually rises and reaches the liquid level sensor 17, the liquid level sensor 17 transmits a signal to the controller, and the controller controls the electric telescopic column of the lifting leg 2 to extend, moving the support seat 3 and the transformer body upward, thereby ensuring the normal operation of the transformer box 5.

[0046] Second embodiment

[0047] For dry-type transformers, heat dissipation performance is particularly important. In the above embodiment, heat dissipation is only performed through the air inlet pipe 9 and related components, which is generally effective. Therefore, it is necessary to further improve the heat dissipation effect inside the transformer box 5.

[0048] Reference Figure 8A first air storage portion is provided between the sliding "U"-shaped frame 15 and the inner wall of the support seat 3, a support column 20 is provided under the support plate 12, and a second air storage portion 21 is provided on the support column 20. The second air storage portion 21 is connected to the first air storage portion through a connecting pipe, and a second one-way valve 22 is provided on the air inlet pipe 9.

[0049] After the sliding "U"-shaped frame 15 is adjusted by the double-headed screw 13 and the transmission member 19 to complete the position adjustment of the transformer box 5, and the first sealing rod 41, the second sealing rod 42, and the buffer pad 43 are installed, thereby completing the seal between the outer wall of the transformer box 5 and the inner wall of the support seat 3, when it is necessary to enhance the heat dissipation effect inside the transformer box 5, the drive motor 14 is controlled to rotate in the opposite direction, and the sliding "U"-shaped frames 15 on both sides are driven by the double-headed screw 13 and the transmission member 19 to move toward the corresponding inner wall of the support seat 3. When the frame 15 approaches the inner wall of the support seat 3, the sliding "U" frame 15 squeezes the first gas storage part, so that the gas pre-stored in the first gas storage part enters the second gas storage part 21 through the connecting pipe. After a predetermined amount of gas enters the second gas storage part 21 and expands, it pushes the support plate 12 upward to move upward. The support plate 12 pushes the transformer box 5 above it to move upward. Since the outer wall of the transformer box 5 and the inner wall of the support seat 3 are sealed by the first sealing rod 41, the second sealing rod 42, and the buffer pad 43, the support plate 12 can push the transformer box 5 above it. The upward sealing movement relative to the support seat 3 makes the volume of the transformer box 5 extending into the support seat 3 smaller, the internal space of the support seat 3 becomes larger and negative pressure is generated. At this time, the hot air in the transformer box 5 can be sucked into the support seat 3 through the second one-way valve 22 and the air inlet pipe 9 (the first one-way valve 16 is in a closed state at this time), and then the drive motor 14 is controlled to rotate forward, and the sliding "U"-shaped frames 15 on both sides are driven to move away from the corresponding inner wall of the support seat 3 through the double-headed screw 13 and the transmission member 19. In the process of sliding the "U"-shaped frame 15 away from the inner wall of the support seat 3, In the process of the transformer box 5 sealing downward movement relative to the inner wall of the support base 3, the volume of the transformer box 5 extending into the support base 3 increases, which can squeeze the air in the support base 3, causing the air in the support base 3 to be discharged from the first one-way valve 16 (at this time, the second one-way valve 22 is in a closed state). By repeatedly controlling the reverse and forward rotation of the drive motor 14, the flow of gas between the first and second air storage parts 21 can be controlled to achieve the control of the transformer box 5 to repeatedly seal up and down movement relative to the support base 3, and then the hot air in the transformer box 5 can be repeatedly sucked into the support base 3 through the second one-way valve 22 and the air inlet pipe 9, and then discharged to the outside of the support base 3 by the first one-way valve 16, thereby achieving the external discharge of the hot air inside the transformer box 5, and improving the heat dissipation effect inside the transformer box 5.

[0050] Therefore, this embodiment, based on the use of the sliding "U"-shaped frame 15 to adjust the installation position of the transformer box 5 and the use of the support plate 12 and the buffer spring 18 to support and buffer the transformer box 5, can squeeze and release the first air storage part by sliding the "U"-shaped frame 15, so that the airflow stored in the first air storage part can flow in the second air storage part 21, and then adjust the transformer box 5 to move up and down relative to the support seat 3 through the second air storage part 21. The hot air in the transformer box 5 can be sucked into the support seat 3 through the second one-way valve 22 and the air inlet pipe 9, and then discharged to the outside of the support seat 3 by the first one-way valve 16, thereby improving the heat dissipation effect inside the transformer box 5.

[0051] Third embodiment

[0052] In the above embodiment, when the support plate 12 supports the transformer box 5, the guide slide 11 and the buffer spring 18 can buffer and reduce the shock of the transformer box 5. However, in a working environment with large vibrations, the shock absorption effect of the transformer box 5 needs to be further improved.

[0053] When there is no need for additional heat dissipation in the transformer box 5 and the shock absorption effect of the transformer box 5 needs to be further adjusted, the driving motor 14 is controlled to rotate in the opposite direction, and the sliding "U"-shaped frames 15 on both sides are driven by the double-headed screw 13 and the transmission member 19 to move toward the corresponding inner wall direction of the support seat 3. In the process of the sliding "U"-shaped frame 15 approaching the inner wall of the support seat 3, the sliding "U"-shaped frame 15 squeezes the first gas storage part, so that the gas pre-stored in the first gas storage part enters the second gas storage part 21 through the connecting pipe. A predetermined amount of gas enters the second gas storage part 21 and after expansion, it can support the transformer box 5 through the support plate 12. By controlling the degree to which the sliding "U"-shaped frame 15 squeezes the first air storage part, and thereby controlling the amount of gas entering the second air storage part 21 from the first air storage part, the second air storage part 21 after intake and expansion can support and cushion the transformer box 5 through the support plate 12, and the expanded second air storage part 21 and the buffer spring 18 can jointly perform shock absorption and cushioning on the transformer box 5. In a working environment with large vibrations, compared with the shock absorption effect of the buffer spring 18 alone, the coordinated shock absorption and cushioning of the transformer box 5 by the inflated and expanded second air storage part 21 and the buffer spring 18 is more conducive to the stable operation of the transformer box 5.

[0054] Fourth embodiment

[0055] In a rainy working environment, when the water level at the base 1 gradually rises and reaches the liquid level sensor 17, the liquid level sensor 17 transmits a signal to the controller, which controls the electric telescopic column of the lifting leg 2 to extend, moving the support base 3 and the transformer case 5 upward to prevent water from entering the transformer case 5. However, when the water level in the external environment is high, the lifting leg 2 is extended to its longest position, and when the water level gradually rises to the height of the liquid level sensor 17, the height of the transformer case 5 can no longer be adjusted by controlling the lifting leg 2 through the controller. At this time, the height of the transformer case 5 can be further adjusted through the first and second air storage portions 21 and the support plate 12.

[0056] Specifically, when the controller controls the lifting legs 2 to extend to the longest position and the water level gradually rises to the height of the liquid level sensor 17, the control driving motor 14 is controlled to rotate in the opposite direction, and the sliding "U"-shaped frames 15 on both sides are driven by the double-headed screw 13 and the transmission member 19 to move toward the corresponding inner wall direction of the support seat 3. In the process of sliding the "U"-shaped frame 15 approaching the inner wall of the support seat 3, the sliding "U"-shaped frame 15 squeezes the first gas storage part, so that the gas pre-stored in the first gas storage part enters the second gas storage part 21 through the connecting pipe. After all the gas in the first gas storage part enters the second gas storage part and expands, the support plate 12 is pushed upward to move upward. The support plate 12 pushes the transformer box 5 above it to move upward, so that the height of the transformer box 5 is further increased to delay the time for external water to enter the transformer box 5, thereby ensuring the normal operation of the transformer box 5 to the greatest extent.

[0057] In summary, the first gas storage part and the second gas storage part 21 and the support plate 12, the buffer spring 18 and the mutual cooperation of the first one-way valve 16 and the second one-way valve 22, on the one hand, repeatedly control the sliding "U"-shaped frame 15 to squeeze the first gas storage part, so that the gas flows between the first gas storage part and the second gas storage part 21, thereby realizing that the transformer box 5 can repeatedly move up and down in a sealed manner relative to the support seat 3, and the hot air in the transformer box 5 is sucked into the support seat 3 through the second one-way valve 22 and the air inlet pipe 9, and then discharged to the outside of the support seat 3 from the first one-way valve 16, thereby improving the heat dissipation effect in the transformer box 5; on the other hand, according to the requirements of the working environment, the first gas storage part can be squeezed by controlling the sliding "U"-shaped frame 15 to make a predetermined amount of gas in the first gas storage part enter the second one-way valve 22 and the air inlet pipe 9. In the second gas storage part 21, the expanded second gas storage part 21 and the buffer spring 18 cooperate to reduce shock and buffer the transformer box 5, which is more conducive to the stable operation of the transformer box 5; thirdly, when the controller controls the lifting leg 2 to extend to the longest position and the water level gradually rises to the height of the liquid level sensor 17, the first gas storage part is squeezed by controlling the sliding "U"-shaped frame 15 to squeeze the first gas storage part, and all the gas pre-stored in the first gas storage part is squeezed into the second gas storage part 21. The second gas storage part 21 pushes the support plate 12 upward to move upward, and the support plate 12 pushes the transformer box 5 above it upward, so that the height of the transformer box 5 is further increased to delay the time for external water to enter the transformer box 5, thereby ensuring that the transformer box 5 works normally to the greatest extent.

[0058] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A protective device for the bottom of a dry-type transformer, comprising a base (1) and a support seat (3) for supporting a transformer box (5), characterized in that: The four corners of the top surface of the base (1) are fixedly mounted with lifting legs (2), a groove is provided in the middle of the top surface of the support seat (3), the transformer box (5) is placed in the groove, and a sealing outer frame (4) is clamped at the top of the groove to seal the gap between the outer wall of the transformer box (5) and the inner wall of the groove, an air inlet pipe (9) is provided at the bottom end of the side surface of the support seat (3) and is connected to the top of the transformer box (5), a liquid level sensor (17) is embedded in the top of the other two side surfaces of the support seat (3), and a first one-way valve (16) is provided on both sides of the liquid level sensor (17); The transformer box (5) is placed on a support plate (12), and two double-headed screws (13) are provided in a groove below the support plate (12). The ends of the two double-headed screws (13) are respectively rotatably mounted in the inner wall of the groove. A sliding "U"-shaped frame (15) is commonly connected to the ends of the same side of the two double-headed screws (13), and the top ends of the two sliding "U"-shaped frames (15) pass through the support plate (12); A first air storage portion is provided between the sliding "U"-shaped frame (15) and the inner wall of the support seat (3); a support column (20) is provided below the support plate (12); a second air storage portion (21) is provided on the support column (20); the second air storage portion (21) is connected to the first air storage portion through a connecting pipe; a second one-way valve (22) is provided on the air inlet pipe (9); The two symmetrical side walls of the groove of the support seat (3) are provided with three side grooves (10) in a linear array, a guide slide (11) is installed in each side groove (10), and a horizontally arranged support plate (12) is connected between the plurality of guide slides (11); A convex block inserted into the side groove (10) protrudes from the side surface of the support plate (12), and the convex block is slidably sleeved on the guide slide column (11), and a buffer spring (18) is sleeved on the guide slide column (11) below the convex block.

2. A protective device for the bottom of a dry-type transformer according to claim 1, characterized in that: The base (1) is frame-shaped, and four corners of the top surface of the base (1) are provided with mounting holes.

3. The protective device for the bottom of a dry-type transformer according to claim 1, characterized in that: The top end of the lifting leg (2) is fixedly connected to a support block (6), the support seat (3) is arranged between the four lifting legs (2), and the four corners of the top surface of the support seat (3) are fixedly connected to positioning blocks (8) that are clamped with the support block (6).

4. A protective device for the bottom of a dry-type transformer according to claim 3, characterized in that: A positioning socket (7) is provided in the center of the top surface of the support block (6), and a positioning column adapted to the positioning socket (7) is connected in the center of the bottom surface of the positioning block (8).

5. The protective device for the bottom of a dry-type transformer according to claim 1, characterized in that: A transmission member (19) is connected between the middle parts of the two double-headed screws (13), and the two double-headed screws (13) rotate synchronously through the transmission member (19), and the end of one of the double-headed screws (13) extends out of the base (1) and is connected to a drive motor (14).

6. The protective device for the bottom of a dry-type transformer according to claim 5, characterized in that: Both ends of the support plate (12) are symmetrically provided with through grooves for sliding the sliding "U"-shaped frame (15).

7. The protective device for the bottom of a dry-type transformer according to claim 5, characterized in that: The sealing outer frame (4) includes a first sealing rod (41) and a second sealing rod (42) that are mutually engaged. The first sealing rod (41) and the second sealing rod (42) are both "U"-shaped rods, and the two adjacent ends of the first sealing rod (41) and the second sealing rod (42) are in an "L"-shaped structure that are mutually engaged. The lower ends of the first sealing rod (41) and the second sealing rod (42) are inserted into the gap between the transformer box (5) and the inner wall of the groove, and the upper ends of the first sealing rod (41) and the second sealing rod (42) extend outward to the top surface of the support seat (3).

8. The protective device for the bottom of a dry-type transformer according to claim 7, characterized in that: The inner sidewalls of the lower ends of the first sealing rod (41) and the second sealing rod (42) are both provided with frame-shaped grooves, and the frame-shaped grooves are filled with buffer pads (43).

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