A sealed and explosion-proof dry-type transformer

Abstract

The present invention discloses a dry-type transformer with sealing and explosion-proof functions, belonging to the field of the outer shell of dry-type transformers. It includes a main cabinet, on both the left and right sides inside the main cabinet are slidably connected with side cabinets, the front surface of the side cabinet is rotatably connected with a side door through a hinge, the side door is located inside the main cabinet, the front surface of the main cabinet is rotatably connected with a main door through a hinge, a number of cross-frame groups are linearly arrayed on the rear surface inside the main cabinet, the longitudinal frame group is detachably connected inside the cross-frame group, and a dry-type transformer body is arranged between the four longitudinal frame groups. In the present invention, through the installation of longitudinal frame groups at different positions, flexible adjustment can be made according to the size of the dry-type transformer body; the four adjacent longitudinal frame groups support and limit the four corners of the transformer body, and together with the limitation of the rear cross-frame group, ensure the stable installation of the dry-type transformer body; and enable the inside of the main cabinet to adapt to dry-type transformers of different specifications, improving the versatility and applicability of the equipment.

Description

Technical Field

[0001] The present invention relates to the field of dry-type transformer enclosures, and particularly to a sealed and explosion-proof dry-type transformer. Background Art

[0002] With the rapid development of the economy and the continuous progress of society, the demand for electricity continues to grow. As an important device in the power distribution system, dry-type transformers are also increasingly widely used. In the fields of industrial production, commercial buildings, and residential life, the requirements for the reliability and stability of electricity are getting higher and higher, which requires more high-performance dry-type transformers to meet the demand for power supply. For example, in some large industrial projects, a large amount of power support is needed, and the performance and quantity of dry-type transformers directly affect the smooth progress of the project.

[0003] In order to meet the power requirements of the power distribution system in different scenarios, the specifications and types of dry-type transformers are also constantly expanding. Sealed and explosion-proof dry-type transformers, due to their good sealing performance and explosion-proof performance, can adapt to various complex environmental conditions and are widely used in some special occasions such as petrochemical, mining and other fields. The emergence of this type of transformer provides more choices to meet the power requirements of different power distribution systems.

[0004] The existing installation method of dry-type transformers is relatively fixed. In some cases where the transformer specifications need to be changed, large-scale transformation of the installation foundation is often required, increasing the cost and workload. In addition, the traditional installation structure has insufficient stability in limiting the transformer, which easily causes the transformer to displace during operation, affecting its performance and safety;

[0005] Therefore, there is provided a dry-type transformer that solves the problems of traditional transformer installation and adaptability through the design of adjustable longitudinal frame groups and transverse frame groups, as well as convenient installation and disassembly methods, and can be flexibly adjusted according to dry-type transformer equipment of different sizes, achieving stable installation and limiting, and improving the installation efficiency and reliability.

[0006] A large amount of heat is generated during the operation of dry-type transformers. If the heat dissipation is poor, it will affect their performance and lifespan. The traditional heat dissipation methods of dry-type transformers mainly include natural cooling and forced air cooling, but both of these methods have certain limitations. Natural cooling has poor heat dissipation effect and is difficult to meet the heat dissipation requirements of high-power transformers; forced air cooling requires additional heat dissipation equipment, increasing the cost and energy consumption, and is prone to failure in some harsh environments.

[0007] Therefore, there is provided a sealed and explosion-proof dry-type transformer that can achieve efficient air-cooled heat dissipation through the reciprocating movement of the side cabinet, without additional heat dissipation equipment, reducing the cost and energy consumption. At the same time, the sealed design also improves the protection performance of the transformer, enabling it to better adapt to different environmental conditions. Summary of the Invention

[0008] Aiming at the deficiencies of the prior art, the present invention provides a dry-type transformer with sealed explosion protection, which solves the problems raised in the above-mentioned background art.

[0009] Technical Solution: To solve the above technical problems, according to one aspect of the present invention, more specifically, it is a dry-type transformer with sealed explosion protection, including a main cabinet. On the left and right sides inside the main cabinet, there are sliding-connected side cabinets. The front surface of the side cabinet is rotatably connected to a side door through a hinge. The side door is located inside the main cabinet. The front surface of the main cabinet is rotatably connected to a main door through a hinge. On the rear surface inside the main cabinet, there are several horizontal frame groups arranged in a linear array. Inside the horizontal frame group, there is a detachable connection with a vertical frame group. Between the four vertical frame groups, there is a dry-type transformer body. The rear surface of the dry-type transformer body is in contact with the front surface of the horizontal frame group, and the four corners of the dry-type transformer body are respectively in contact with the outer surfaces of the adjacent four vertical frame groups.

[0010] Furthermore, the horizontal frame group includes a cross beam. On the front surface of the cross beam, there are several jacks. On the upper surface of the cross beam, there is a horizontal groove. All the jacks are connected to the inside of the horizontal groove. Inside the lower part of the cross beam, there is a rotatably connected screw rod one. On the outer surface of the screw rod one, there are two threaded blocks. The two threaded blocks are respectively located on the left and right sides of the cross beam. The top end of the threaded block is rotatably connected to a connecting rod one. The opposite ends of the two connecting rod ones are jointly rotatably connected to a cross bar. The cross bar is located inside the horizontal groove. On the left and right ends of the screw rod one, there are fixed rotating blocks.

[0011] Furthermore, the vertical frame group includes a cross beam. At the center of the rear end of the cross beam, there is a fixed insertion rod. Above the outer surface of the insertion rod, there is a card slot. Inside the cross beam, there is a through-opening inner groove in the front. On the rear surface of the inner groove, there is a rotatably connected main gear. On the left and right ends of the main gear, there are engaged with driven gears. The driven gears are rotatably connected to the inside of the inner groove. In the middle of the main gear, there is a fixed rotating rod. On the outer surface of the rotating rod, there is a sleeved push plate. On the front surface of the driven gear, there is a fixed rectangular rod. On the outer surface of the rectangular rod, there are slidably connected a positioning card plate and a turntable from front to back in sequence. The turntable is fixed to the positioning card plate. On the outer surface of the turntable, there is a ring-shaped limiting groove. Above the inner groove, there is a rotatably connected screw rod two. At the top end of the push plate, there is an integrally formed screw plate. The inside of the screw plate is threadedly connected to the outer surface of the screw rod two.

[0012] Furthermore, the insertion rod is inserted into the jack, the card slot is located inside the horizontal groove, and the card slot is clamped with the cross bar.

[0013] Furthermore, the front surfaces of the screw rod two and the rotating rod both penetrate to the front surface of the cross beam and are respectively fixed with an operation block one and an operation block two.

[0014] Furthermore, a plurality of air grooves are formed through the rear surface of the side cabinet, the rear end of the cross beam is located inside the air grooves, and the cross beam is slidably connected with the air grooves.

[0015] Furthermore, two motors are fixed on the upper surface of the main cabinet. A crank is fixed to the rear end of the output shaft of the motor. A second connecting rod is rotatably connected to the outer surface of the crank. A fixed rod is fixed to the rear surface of the side cabinet. The outer surface of the fixed rod is rotatably connected to the end of the second connecting rod away from the crank.

[0016] Furthermore, rollers are rotatably connected to the bottoms of the two side cabinets.

[0017] The beneficial effects of a sealed and explosion-proof dry-type transformer of the present invention are as follows: (1). By arranging the longitudinal frame groups at different positions, the present invention can be flexibly adjusted according to the size of the dry-type transformer body; the four adjacent longitudinal frame groups support and limit the four corners of the transformer body, and together with the limitation of the rear cross frame group, ensure the stable installation of the dry-type transformer body; and enable the inside of the main cabinet to accommodate dry-type transformers of different specifications, improving the versatility and applicability of the equipment; in different power demand scenarios, dry-type transformers of appropriate sizes can be selected for installation according to actual conditions without replacing the entire cabinet, reducing costs.

[0018] The cross-shaped longitudinal frame group design allows arbitrary installation and assembly, enabling the installation of a suitable dry-type transformer body between four adjacent longitudinal frame groups; enabling the installation and placement of a plurality of dry-type transformer bodies inside the main cabinet, improving space utilization, and meeting various power demand scenarios.

[0019] (2). By arranging the side cabinet, the present invention provides an effective solution for the heat dissipation of the dry-type transformer body; by driving the crank to rotate with the motor, the second connecting rod is pushed and pulled to make the side cabinet slide horizontally back and forth left and right by using the rollers; during the sliding process, the internal spaces of the main cabinet and the side cabinet change continuously, causing the internal pressure to change, thereby realizing efficient air-cooled heat dissipation of the dry-type transformer body; when the space contracts and squeezes, the gas heated by the operation and heat dissipation of the transformer body is discharged through the air grooves; when the space stretches, the external cold air is sucked into the internal space of the cabinet under negative pressure; the natural convection heat dissipation method does not require additional heat dissipation equipment, reducing costs and energy consumption, and at the same time improving the heat dissipation efficiency.

[0020] In special cases, the side cabinets can be slid into the main cabinet, allowing the air slots connected to the outside to also enter the main cabinet, thus isolating the internal space of the main cabinet from the outside. The sealed design can better isolate the dry-type transformer body from external environmental damage, such as dust, moisture, corrosive gases, etc. The dry-type transformer body with sealed explosion-proof properties already has good explosion-proof performance, and with the sealed design of the main cabinet and side cabinets, the safety of the entire transformer system is further improved. For example, in harsh environmental conditions or flammable and explosive places, it can more effectively protect the dry-type transformer, prevent damage caused by external factors, and ensure the safety of personnel and equipment.

[0021] (3) During the use of the present invention, when it is necessary to open for maintenance or installation and disassembly, the two side cabinets can be moved to the outermost side. In this way, the internal space after opening is larger, facilitating personnel to operate. First, turn up the main door upward, and then rotate the side doors on both sides outward to open, completely exposing the internal space of the cabinet, providing sufficient operating space for personnel. This enables personnel to operate more conveniently when performing installation, disassembly, maintenance, and inspection work on the dry-type transformer, improving work efficiency. When performing maintenance work on large dry-type transformers or multiple installed dry-type transformers, the large-space operation allows personnel to perform various operations more easily, reducing the operation difficulty and risk. Brief Description of the Drawings

[0022] The following further elaborates on the present invention in detail in conjunction with the drawings and specific implementation methods.

[0023] Figure 1 It is a schematic structural diagram of the present invention;

[0024] Figure 2 It is a schematic rear-view structural diagram of the present invention;

[0025] Figure 3 It is a schematic sectional structural diagram of the present invention;

[0026] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in;

[0027] Figure 5 It is a schematic internal structural diagram of the main cabinet in the present invention;

[0028] Figure 6 It is a schematic structural diagram of the cross-frame group and longitudinal-frame group in the present invention;

[0029] Figure 7 It is a schematic structural diagram of the cross-frame group in the present invention;

[0030] Figure 8 It is a schematic structural diagram of the cross beam in the present invention;

[0031] Figure 9It is a schematic side view structure diagram of the longitudinal frame group in the present invention;

[0032] Figure 10 It is a schematic diagram of the internal structure of the longitudinal frame group in the present invention;

[0033] Figure 11 For the present invention Figure 10 schematic side view structure diagram.

[0034] In the figure: 1, main cabinet; 2, side cabinet; 3, side door; 4, main door; 5, air groove; 6, cross frame group; 7, longitudinal frame group; 8, dry-type transformer body; 9, roller; 10, cross beam; 11, jack; 12, cross groove; 13, screw one; 14, screw block; 15, connecting rod one; 16, cross bar; 17, rotating block; 18, cross beam; 19, inserting rod; 20, card slot; 21, inner groove; 22, main gear; 23, slave gear; 24, rotating rod; 25, pushing plate; 26, rectangular rod; 27, positioning card plate; 28, turntable; 29, limiting groove; 30, screw two; 31, screw plate; 32, operating block one; 33, operating block two; 34, motor; 35, crank; 36, connecting rod two; 37, fixed rod. Specific embodiments

[0035] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0036] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0037] Refer to Figures 1-11, A sealed and explosion-proof dry-type transformer, including a main cabinet 1. On both the left and right sides inside the main cabinet 1, there are sliding-connected side cabinets 2. The front surface of the side cabinet 2 is rotatably connected to a side door 3 through a hinge. The side door 3 is located inside the main cabinet 1. The front surface of the main cabinet 1 is rotatably connected to a main door 4 through a hinge. On the rear surface inside the main cabinet 1, there is a linear array of several cross-frame groups 6. Inside the cross-frame group 6, there is a detachably connected longitudinal-frame group 7. Between the four longitudinal-frame groups 7, there is a dry-type transformer body 8. The dry-type transformer body 8 is a sealed and explosion-proof dry-type transformer. The rear surface of the dry-type transformer body 8 is in contact with the front surface of the cross-frame group 6. The four corners of the dry-type transformer body 8 are respectively in contact with the outer surfaces of the adjacent four longitudinal-frame groups 7. According to the size of the dry-type transformer body 8, select the longitudinal-frame groups 7 at different positions to support and limit the four corners of the dry-type transformer body 8, so that the dry-type transformer body 8 cannot move up and down or left and right, and cannot move backward due to the limitation of the cross-frame group 6 at the rear; when performing maintenance or installation and disassembly, the two side cabinets 2 can be moved to the outermost side, so that the internal space after opening is larger and it will be more convenient for personnel to operate; when opening, first turn up the main door 4 upward, and then rotate the two side doors 3 outward to open, and at this time the internal space of the cabinet is completely exposed, which is convenient for personnel to operate.

[0038] Refer to Figures 6-11 , The cross-frame group 6 includes a cross beam 10. On the front surface of the cross beam 10, there are several jacks 11. On the upper surface of the cross beam 10, there is a cross groove 12. Several jacks 11 are all connected to the inside of the cross groove 12. Inside the lower part of the cross beam 10, there is a rotatably connected screw rod 13. On the outer surface of the screw rod 13, there are two screw blocks 14 threadedly connected. The two screw blocks 14 are respectively located on the left and right sides of the cross beam 10. The top end of the screw block 14 is rotatably connected to a connecting rod 15. The relative ends of the two connecting rods 15 are jointly rotatably connected to a cross bar 16. The cross bar 16 is located inside the cross groove 12. On both the left and right ends of the screw rod 13, there are fixed rotating blocks 17.

[0039] The longitudinal frame group 7 includes a cross beam 18. At the center of the rear end of the cross beam 18, a plug rod 19 is fixed. Above the outer surface of the plug rod 19, a clamping groove 20 is opened. Inside the front of the cross beam 18, an inner groove 21 is penetrated. At the rear surface of the inside of the inner groove 21, a main gear 22 is rotatably connected. At both the left and right ends of the main gear 22, driven gears 23 are meshed and connected. The driven gears 23 are rotatably connected to the inside of the inner groove 21. In the middle of the main gear 22, a rotating rod 24 is fixed. A push plate 25 is sleeved on the outer surface of the rotating rod 24. At the front surface of the driven gear 23, a rectangular rod 26 is fixed. On the outer surface of the rectangular rod 26, a positioning clamping plate 27 and a turntable 28 are sequentially slid from front to back. The turntable 28 is fixedly connected to the positioning clamping plate 27. An annular limiting groove 29 is opened on the outer surface of the turntable 28. Above the inside of the inner groove 21, a second screw rod 30 is rotatably connected. At the top end of the push plate 25, a screw plate 31 is integrally formed. The inside of the screw plate 31 is threadedly connected to the outer surface of the second screw rod 30. The cross-shaped longitudinal frame group 7 enables, through arbitrary installation and assembly, suitable dry-type transformer bodies 8 to be installed between adjacent four longitudinal frame groups 7, so that a plurality of dry-type transformer bodies 8 can be installed and placed inside the main cabinet 1 for use. The rear surface of the positioning clamping plate 27 is attached to the front surface of the dry-type transformer body 8, so that the longitudinal frame group 7 not only limits the dry-type transformer body 8 in the left-right, up-down directions, but also prevents the dry-type transformer body 8 from moving forward, thereby stably installing and placing the dry-type transformer body 8.

[0040] The plug rod 19 is inserted into the jack 11. The clamping groove 20 is located inside the horizontal groove 12 and is clamped with the cross bar 16. The plug rod 19 is adapted to all the jacks 11, enabling arbitrary replacement of the installation position to adapt to dry-type transformer bodies 8 of different sizes. By rotating the rotating block 17, the first screw rod 13 rotates, and the two screw blocks 14 move relatively, pushing against the connecting rod 15 to raise the cross bar 16, so that the cross bar 16 disengages from the horizontal groove 12, and then the plug rod 19 in the longitudinal frame group 7 can be pulled out to complete the disassembly, and it can be replaced and inserted into other positions. After insertion, reverse-rotate the rotating block 17 to lower the cross bar 16 and snap it into the clamping groove 20 at the position of the plug rod 19, and the installation of the longitudinal frame group 7 and the transverse frame group 6 can be completed. By rotating the second screw rod 30, the screw plate 31 and the push plate 25 slide back and forth along the surface of the rotating rod 24. Since the surface of the push plate 25 is located inside the limiting groove 29, it will drive the turntable 28 and the positioning clamping plate 27 to slide along the surface of the rectangular rod 26, so that the positioning clamping plate 27 can be attached to the front surface of the dry-type transformer body 8 to adapt to dry-type transformer bodies 8 of different front-back lengths. And when installing or disassembling the dry-type transformer body 8, by rotating the rotating rod 24, the main gear 22 drives the two driven gears 23 to rotate, and the rectangular rod 26 drives the turntable 28 and the positioning clamping plate 27 to rotate, so that the two positioning clamping plates 27 on both sides rotate 90 degrees and are placed horizontally, no longer contacting and limiting the dry-type transformer body 8 above or below, and then the dry-type transformer body 8 can be moved forward to be detached.

[0041] Refer to Figures 9-11, the second screw 30 and the front end of the rotating rod 24 both penetrate through the front surface of the cross beam 18, and an operation block one 32 and an operation block two 33 are respectively fixed. By rotating the operation block one 32, the second screw 30 can be rotated, and by rotating the operation block two 33, the rotating rod 24 can be rotated.

[0042] Refer to Figures 1-5 , a plurality of air grooves 5 are penetrated and opened on the rear surface of the side cabinet 2. The rear end of the cross beam 10 is located inside the air groove 5, and the cross beam 10 is slidably connected to the air groove 5. In special cases, by sliding the two side cabinets 2 into the main cabinet 1, the air grooves 5 communicating with the outside also enter the main cabinet 1 accordingly. At this time, the internal space of the main cabinet 1 is isolated from the outside, which better isolates the damage to the dry-type transformer body 8 from the external environment; two motors 34 are fixed on the upper surface of the main cabinet 1. The rear end of the output shaft of the motor 34 is fixed with a crank 35. A second connecting rod 36 is rotatably connected to the outer surface of the crank 35. A fixing rod 37 is fixed on the rear surface of the side cabinet 2. The outer surface of the fixing rod 37 is rotatably connected to one end of the second connecting rod 36 away from the crank 35; rollers 9 are rotatably connected to the bottoms of the two side cabinets 2. When the motor 34 operates, it drives the crank 35 to rotate, and through pushing and pulling the second connecting rod 36, the side cabinets 2 located on both sides of the main cabinet 1 perform horizontal left-right reciprocating sliding through the rollers 9. During the sliding, the internal spaces of the main cabinet 1 and the two side cabinets 2 change continuously, causing the internal pressure to change. When being squeezed, the gas heated by the operation and heat dissipation of the dry-type transformer body 8 is squeezed out through a plurality of air grooves 5. When the space is stretched, the external cold air is sucked into the internal space of the cabinet under negative pressure to perform efficient air-cooling heat dissipation on the dry-type transformer body 8.

[0043] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A dry-type transformer with sealed explosion protection, comprising a main cabinet (1), characterized in that: On both the left and right sides inside the main cabinet (1), there are slidingly connected side cabinets (2). On the front surface of the side cabinet (2), there is a side door (3) rotatably connected by a hinge. The side door (3) is located inside the main cabinet (1). On the front surface of the main cabinet (1), there is a main door (4) rotatably connected by a hinge. On the rear surface inside the main cabinet (1), there is a linear array of several cross-frame groups (6). Inside the cross-frame group (6), there is a longitudinally connected frame group (7) detachably connected. Between the four longitudinally connected frame groups (7), there is a dry-type transformer body (8). The rear surface of the dry-type transformer body (8) is in contact with the front surface of the cross-frame group (6). The four corners of the dry-type transformer body (8) are respectively in contact with the outer surfaces of the adjacent four longitudinally connected frame groups (7). The cross-frame group (6) includes a cross beam (10). On the front surface of the cross beam (10), there are several jacks (11). On the upper surface of the cross beam (10), there is a cross groove (12). All the several jacks (11) are connected to the inside of the cross groove (12). Inside the lower part of the cross beam (10), there is a first screw rod (13) rotatably connected. On the outer surface of the first screw rod (13), there are two screw blocks (14) threadedly connected. The two screw blocks (14) are respectively located on the left and right sides of the cross beam (10). The top end of the screw block (14) is rotatably connected to a first connecting rod (15). The opposite ends of the two first connecting rods (15) are jointly rotatably connected to a cross bar (16). The cross bar (16) is located inside the cross groove (12). On both the left and right ends of the first screw rod (13), there are fixed rotating blocks (17). The longitudinally connected frame group (7) includes a cross-shaped beam (18). At the center of the rear end of the cross-shaped beam (18), there is a plug rod (19) fixed. Above the outer surface of the plug rod (19), there is a card slot (20). Inside the cross-shaped beam (18), there is an inner groove (21) penetrating through the front. On the rear surface inside the inner groove (21), there is a main gear (22) rotatably connected. On both the left and right ends of the main gear (22), there is a driven gear (23) meshingly connected. The driven gear (23) is rotatably connected to the inside of the inner groove (21). In the middle of the main gear (22), there is a rotating rod (24) fixed. On the outer surface of the rotating rod (24), there is a push plate (25) sleeved. On the front surface of the driven gear (23), there is a rectangular rod (26). On the outer surface of the rectangular rod (26), there is a positioning card plate (27) and a turntable (28) slidingly connected in sequence from front to back. The turntable (28) is fixed to the positioning card plate (27). On the outer surface of the turntable (28), there is an annular limiting groove (29). Inside the upper part of the inner groove (21), there is a second screw rod (30) rotatably connected. At the top end of the push plate (25), there is a screw plate (31) integrally formed. Inside the screw plate (31), there is a threaded connection with the outer surface of the second screw rod (30).

2. A dry-type transformer with sealing and explosion-proof features according to claim 1, characterized in that: The plug rod (19) is inserted into the jack (11). The card slot (20) is located inside the cross groove (12). The card slot (20) is clamped with the cross bar (16).

3. A dry-type transformer with sealing and explosion-proof features according to claim 1, characterized in that: The second screw rod (30) and the front end of the rotating rod (24) both penetrate through the front surface of the cross beam (18), and an operation block one (32) and an operation block two (33) are respectively fixed thereon.

4. A dry-type transformer with sealing and explosion-proof features according to claim 1, characterized in that: A plurality of air grooves (5) are formed through the rear surface of the side cabinet (2), the rear end of the cross beam (10) is located inside the air grooves (5), and the cross beam (10) is slidably connected with the air grooves (5).

5. A dry-type transformer with sealed explosion protection according to claim 1, characterized in that: Two motors (34) are fixed on the upper surface of the main cabinet (1), a crank (35) is fixed to the rear end of the output shaft of the motor (34), a second connecting rod (36) is rotatably connected to the outer surface of the crank (35), a fixed rod (37) is fixed to the rear surface of the side cabinet (2), and the outer surface of the fixed rod (37) is rotatably connected to one end of the second connecting rod (36) away from the crank (35).

6. A dry-type transformer with sealed explosion protection according to claim 1, characterized in that: Rollers (9) are rotatably connected to the bottoms of the two side cabinets (2).

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