High-voltage prefabricated substation

Abstract

The utility model provides a high-voltage prefabricated substation, and relates to the field of substations. The high-voltage prefabricated substation comprises a bottom plate, a box body is fixedly connected to the middle of the upper end of the bottom plate, an oil chamber, a switch oil tank, an electrical chamber and a transformation chamber are arranged in the box body, the oil chamber is located at the bottommost part, the switch oil tank is located under the electrical chamber, and the switch oil tank, the electrical chamber and the transformation chamber are arranged side by side; a voltage transformation assembly is fixedly connected to the interior of the voltage transformation chamber; the switch oil tank comprises a shell, a triangular block is fixedly connected to the inner wall of the shell, a push rod is arranged at the end of a fixing plate in an extending mode, a floater is arranged below the end of the fixing plate, and a top block is fixedly connected to the middle of the upper end of the floater and matched with an inclined face arranged at one end of the push rod. The inner bottom wall of the shell is fixedly connected with an overflow valve, and a heat pipe is arranged in the shell. And meanwhile, a novel protection structure is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer substations, in particular to a high-voltage prefabricated transformer substation. Background Art

[0002] Substation refers to the place in the power system where voltage and current are transformed, electric energy is received and distributed. Prefabricated substations use cables or busbars to achieve electrical connection, and all high and low voltage distribution devices and transformers are conventional standard products. Prefabricated substations are small in size, small in footprint, light in weight, low in cost and reliable, and are also called "box-type transformers" or "prefabricated substations".

[0003] The space of existing prefabricated substations is not fully utilized. For example, in the patent subject "A high-voltage prefabricated substation" and the patent application number "CN202021817428.2", an air conditioner is provided on the top of the shell for cooling, and the cold air is transported to each chamber through a pipe to achieve heat dissipation. However, the heat dissipation structure occupies a large space, and the chamber also needs air holes for exhaust, which deteriorates the sealing of the substation. Also, under the same substation scale, it is not conducive to reducing the size of the substation, that is, it is not convenient for the transportation and installation of the substation.

[0004] Most of the existing substation circuit breakers use fuses or overload, short circuit, and leakage protectors. However, fuses are one-time use. To restore the substation, the damaged fuse needs to be replaced, which increases the cost of substation use. The protector is detected, identified, and controlled by the circuit, and is completely controlled by the circuit, and its protection type is relatively single. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a high-voltage prefabricated substation, which solves the problems of inconvenience in heat dissipation and transportation and the inability to effectively disconnect the circuit in time because the existing circuit breaker is completely controlled by electrical signals.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the utility model is implemented through the following technical solutions: a high-voltage prefabricated substation, including: a bottom plate, a box body is fixedly connected to the middle of the upper end of the bottom plate, an oil chamber, a switch oil box, an electrical room and a transformer room are arranged inside the box body, the oil chamber is located at the bottom, the switch oil box is located directly below the electrical room, and the switch oil box, the electrical room and the transformer room are arranged side by side, and a transformer assembly is fixedly connected inside the transformer room. Heat dissipation oil is stored in the oil chamber, and the heat dissipation oil has insulating properties. The heat dissipation oil in the oil chamber is used to supply the switch oil box and the transformer room. The electrical room is provided with related relays, controllers and other devices for monitoring the operation of the substation, and is also used for the power supply connection of external equipment, which will not be repeated here, and a switch is provided in the switch oil box, and is immersed in the heat dissipation oil, which has a certain degree of arc extinguishing effect, and the switch oil box serves as a circuit breaker for the access and output of high-voltage electricity.

[0009] The switch oil tank includes a shell, and a first clamping contact and a second clamping contact are arranged in an upper and lower position inside the shell, a fixing plate is arranged between the first clamping contact and the second clamping contact, a clip is inserted on the fixing plate, and the clip cooperates with the first clamping contact and the second clamping contact at corresponding positions, a second electric cylinder is fixedly connected to the inside of the shell, a second telescopic rod is extended to the lower end of the second electric cylinder, the second telescopic rod passes through the middle part of the fixing plate and is movably arranged with the fixing plate, a first retaining ring and a second retaining ring are fixedly connected to the side wall of the second telescopic rod, the fixing plate is located between the first retaining ring and the second retaining ring, a spring is sleeved on the second telescopic rod, one end of the spring abuts against the second electric cylinder, and the other end of the spring abuts against the fixing plate. The clip serves as a conductor that electrically connects the first clamping contact and the second clamping contact, starts the second electric cylinder, and drives the second telescopic rod to extend or retract. When the first clamping contact and the second clamping contact are electrically connected, the second electric cylinder is started, the second telescopic rod is retracted, and the first retaining ring supports the fixed plate, and the fixed plate and the clip fixed on the fixed plate are moved upward, so that the clip is clamped by the second clamping contact and electrically connected. When the electrical connection between the first clamping contact and the second clamping contact is disconnected, the second electric cylinder is actuated, the second telescopic rod is extended, and the second retaining ring resists and pushes the fixed plate and the clip fixed thereon downward to separate the clip and the second clamping contact, that is, the circuit is disconnected. During the process, the clip is always electrically connected to the first clamping contact.

[0010] A triangular block is fixedly connected to the inner wall of the shell, a push rod is extended from the end of the fixed plate, one end of the push rod is provided with upward and downward inclined surfaces, and the end is against the triangular block, a float is provided below the end of the fixed plate, a top block is fixedly connected to the middle of the upper end of the float, the top block passes through the fixed plate, the upper end of the top block is provided with an inclined surface, and cooperates with the inclined surface provided at one end of the push rod, an overflow valve is fixedly connected to the inner bottom wall of the shell, and the overflow valve is connected to the oil chamber, a heat pipe is provided inside the shell, and the other end of the heat pipe extends to the interior of the transformer chamber. When the first clamping contact and the second clamping contact are electrically connected, the downward inclined surface of the push rod and the upward inclined surface of the triangular block cooperate. During the operation of the substation, if the temperature of the clip, the first clamping contact and the second clamping contact is too high, or the heat in the transformer chamber is transferred to the switch oil tank through the heat pipe, the heat dissipation oil inside the shell is increased, the pressure inside the shell is increased, the overflow valve is turned on, the heat dissipation oil enters the oil chamber, and the float without buoyancy support falls. Under the downward force of the spring on the fixed plate, the push rod moves toward the second electric cylinder, the restrictions on both ends of the fixed plate disappear, and only under the action of the spring, it moves downward, the clip and the second clamping contact are separated, and the circuit is disconnected. At the same time, the second telescopic rod and the fixed plate are movably matched, so during the movement of the fixed plate, the second telescopic rod will not move, and the second telescopic rod indirectly controls the fixed plate through the first retaining ring and the second retaining ring. Therefore, it is necessary to control the position of the first retaining ring and the second retaining ring. During the circuit disconnection process, do not affect the fixed plate.

[0011] When the clip and the second clamping contact are connected, the second electric cylinder is started to pull the fixed plate up, and the spring stores elastic potential energy. During the process, the upward inclined surface of the push rod and the downward inclined surface of the triangular block slide together, which is conducive to the rapid resetting of the fixed plate. After the clip and the second clamping contact are electrically connected, the second telescopic rod state needs to be maintained. After sufficient hydraulic oil is injected into the shell, the second telescopic rod is extended to ensure that the first retaining ring and the second retaining ring will not affect the movement of the fixed plate.

[0012] When there is enough heat dissipation oil in the housing, the clip and the second clamping contact are disconnected, and the second electric cylinder needs to be driven to extend the second telescopic rod, so that the second retaining ring is against the fixed plate. Under the cooperation of the inclined surface of the triangular block and the push rod, and the inclined surface of the push rod and the top block, the float is pushed to sink and the push rod moves toward the second electric cylinder, and the end of the fixed plate passes over the upward inclined surface of the triangular block, so that the clip and the second clamping contact are disconnected. Without the force of the second electric cylinder, the force of the spring cannot make the fixed plate pass over the upward inclined surface of the triangular block.

[0013] When the internal pressure of the shell increases, the heat dissipation oil is sent into the oil chamber through the overflow valve. However, after the internal pressure of the shell returns to normal, the overflow valve is closed. Therefore, the overload of the substation in a short period of time will not trigger the switch tank action, which can avoid repeated contact between the clip and the second clamping contact, causing damage and reducing the service life.

[0014] Preferably, both sides of the front and the upper edge of the box body are rotatably connected with side panels, and the internal movement of the side panels is provided with a front panel, and the front panel is rotatably connected with a box door. During the transportation of the substation, the side panels are rotated and folded on the front of the box body, and the front is pressed by the side panels. This arrangement can effectively reduce the size of the substation for transportation. After arriving at the installation site, rotate the side panels and pull the front panel forward to increase the space for wiring at the front end of the box body, which is beneficial to the work of the staff, as well as the larger space. For later maintenance, after the side panels and the front panel are opened, it is necessary to fill the edge joints with waterproof sealant to improve the waterproof performance of the substation. At the same time, after the side panels are rotated and opened, or extend out of the bottom plate, an opening is provided below, which can be used for cable wiring, and when an arc occurs in the electrical upper chamber, it can be used for pressure relief.

[0015] Preferably, the edge of the front plate is fixedly connected with a fixing rod, the fixing rod is inserted into the interior of the box body, and the end is fixedly connected with a baffle, the fixing rod is threadedly connected with a fixing nut, and the fixing nut and the baffle clamp the box body. This structure is used to fix the front plate, pull the front plate so that the baffle contacts the inner wall of the box body, and then turn the fixing bolt so that the end of the fixing nut abuts against the outer wall of the box body, thereby firmly fixing the front plate to the box body, and the number of fixing rods used can be set according to the size of the front plate.

[0016] Preferably, a heat dissipation mechanism is fixedly connected to the back side of the box body, and the heat dissipation mechanism includes a first slot plate and a second slot plate, and the first slot plate is sleeved on the second slot plate, one end of the first slot plate is fixedly connected to the second cross-flow fan, and one end of the second slot plate is fixedly connected to the first cross-flow fan, and the interior of the transformer chamber is fixedly connected to a first electric cylinder, four first electric cylinders are provided, and a first telescopic rod is extended from one end, and the end of the first telescopic rod is fixedly connected to the corner of the first slot plate. A second air duct is formed between the second slot plate and the box body, and the first crossflow fan is started to extract the air in the second air duct, and fresh air enters the other end of the second air duct. The first electric cylinder is started, and the first telescopic rod is extended to send the first slot plate out, so that the first air duct is formed between the first slot plate and the second slot plate, and the second crossflow fan pumps air into the first flow channel, and the air is sent out from the other end of the first flow channel. When the temperature of the substation is too high, the first electric cylinder works to form the first air duct, which can increase the heat dissipation effect, and during the transportation of the device, the first slot plate is attached to the second slot plate, which can reduce the size of the device and facilitate the transportation of the substation. At the same time, after the first slot plate is attached to the second slot plate, the first crossflow fan and the second crossflow fan are started at the same time to increase the air volume in the air duct.

[0017] Preferably, the inner wall of the first slot plate is fixedly connected with heat dissipation columns, the heat dissipation columns penetrate the second slot plate, the inner wall of the second slot plate is fixedly connected with heat dissipation fins at equal distances, and the heat dissipation fins and the heat dissipation columns are staggered. When air passes through the heat dissipation columns and the heat dissipation fins, it takes away the heat for heat dissipation, and the heat dissipation columns and the heat dissipation fins are staggered so that the first slot plate can be attached to the second slot plate.

[0018] Preferably, the first slot plate and the second slot plate are both provided with oil passages, the inside of the transformer chamber is fixedly connected with a second oil pump, the output end of the second oil pump is fixedly connected with an oil delivery pipe, the oil delivery pipes are both connected with one end of the oil passages, and the other end of the oil passages is connected with the transformer chamber. When the second oil pump is started, the high-temperature oil in the transformer chamber is pumped into the flow channel through the oil delivery pipe, the heat is transferred to the heat dissipation column and the heat sink by heat transfer, and the cooled oil flows back to the transformer chamber.

[0019] Preferably, the four corners of the bottom plate are provided with through holes, and the through holes are interspersed with embedded screws, and the threads on the embedded screws are matched with limit nuts, and the limit nuts are provided above and below the bottom plate. In the installation room, the embedded screws are fixed in advance, and then the limit nuts are set on the embedded screws, and then they are set against the embedded screws, and then the bottom plate is clamped and fixed by using the limit nuts, and finally the substation is hoisted and fixed on the bottom plate. This setting can be beneficial to controlling the ground clearance of the substation and also beneficial to the hoisting of the substation.

[0020] Preferably, a plurality of wiring terminals are fixedly connected to the side wall of the switch oil box, and the wiring terminals are electrically connected to the second clamping contacts at corresponding positions, and are used to connect the main input and output cables.

[0021] Preferably, the interior of the oil chamber is connected to a first oil pump, the output end of the first oil pump is fixedly connected to a main pipe, the main pipe extends into the transformer chamber, a branch pipe is fixedly connected to the main pipe, and the branch pipe extends into the interior of the switch oil box. If the heat dissipation oil in the transformer chamber and the switch box is insufficient, the first oil pump is started to supply oil through the main pipe and the branch pipe.

[0022] Preferably, a first valve is fixedly connected to the main pipe, the branch pipe is located between the first valve and the first oil pump, and a second valve is fixedly connected to the branch pipe. If the heat dissipation oil in the transformer chamber is insufficient, the first valve is opened, and if the heat dissipation oil in the switch oil tank is insufficient, the second valve is opened.

[0023] (III) Beneficial effects

[0024] The utility model provides a high-voltage prefabricated substation. It has the following beneficial effects:

[0025] 1. The utility model provides a physical structure protection device, which adopts a heat pipe, a relief valve, a float, a triangular block, a push rod, a top block, a fixed plate, a spring, etc. When high temperature appears in the substation, the power supply can be cut off to achieve protection, and an overload, short circuit and leakage protector can be installed in the electrical room. The cooperation of the two improves the safety and stability of the operation of the distribution station.

[0026] 2. The utility model is provided with rotatable and foldable side panels. In the folded state, the entire size of the substation can be reduced to facilitate transportation. When in use, the side panels are unfolded and the front panel is fixed to increase the space in the wiring area, which is conducive to operation and cable layout.

[0027] 3. The utility model is provided with a heat dissipation mechanism, and the heat dissipation mechanism can form a double air duct to improve the heat dissipation effect. When the substation is operating at a safe temperature, a single air duct can be used, that is, the first slot plate is attached to the second slot plate, which can meet the needs of rapid heat dissipation of the substation. In the transportation scenario, the first slot plate is attached to the second slot plate, which can reduce the entire size of the substation and facilitate transportation.

[0028] 4. The utility model is provided with embedded screws, which are conducive to the adjustment of the height and levelness of the bottom plate and convenient for the transportation and installation of the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front perspective schematic diagram of the utility model;

[0030] Figure 2 It is a three-dimensional schematic diagram of the back side of the utility model;

[0031] Figure 3 It is a front internal schematic diagram of the utility model;

[0032] Figure 4 It is a side cross-sectional schematic diagram of the utility model;

[0033] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0034] Figure 6 It is a cross-sectional schematic diagram of the heat dissipation mechanism of the utility model;

[0035] Figure 7 It is a cross-sectional schematic diagram of the first slot plate of the utility model;

[0036] Figure 8 It is a side cross-sectional schematic diagram of the switch oil tank of the utility model;

[0037] Fig. 9 This is a schematic diagram of the fixed plate structure of the utility model;

[0038] Fig.10 This is a schematic diagram of the structure of the end portion of the fixed plate of the utility model;

[0039] Fig.11 It is a partial schematic diagram of the front plate fixing rod of the utility model.

[0040] Among them, 1. side plate; 2. front plate; 3. box body; 4. embedded screw rod; 5. bottom plate; 6. heat dissipation mechanism; 7. switch oil tank; 8. oil chamber; 9. transformer assembly; 10. first oil pump; 11. main pipe; 12. electrical room; 13. transformer room; 14. oil pipeline; 15. second oil pump; 16. first valve; 17. branch pipe; 18. second valve; 19. fixing rod; 20. fixing nut; 21. baffle;

[0041] 601, first cross-flow fan; 602, first slot plate; 603, second cross-flow fan; 604, heat dissipation column; 605, second slot plate; 606, heat sink; 607, first telescopic rod; 608, first electric cylinder; 609, oil channel; 701, shell; 702, relief valve; 703, first clamping contact; 704, clip; 705, fixing plate; 706, wiring terminal; 707, second clamping contact; 708, heat pipe; 709, float; 710, first retaining ring; 711, second telescopic rod; 712, second retaining ring; 713, spring; 714, second electric cylinder; 715, triangular block; 716, push rod; 717, top block. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] Example:

[0044] like Figure 1-11 As shown, the embodiment of the utility model provides a high-voltage prefabricated substation, including a bottom plate 5, which is a rectangular plate. The middle part of the upper end of the bottom plate 5 is fixedly connected to a box body 3. The inside of the box body 3 is provided with an oil chamber 8, a switch oil tank 7, an electrical chamber 12 and a transformer chamber 13. The oil chamber 8 is located at the bottom, the switch oil tank 7 is located directly below the electrical chamber 12, and the switch oil tank 7, the electrical chamber 12 and the transformer chamber 13 are arranged side by side. The inside of the transformer chamber 13 is fixedly connected with a transformer assembly 9. The transformer assembly 9 is used for voltage conversion. At the same time, the transformer assembly 9 is immersed in heat dissipation oil. When the heat dissipation oil is insufficient, the oil chamber 8 provides it. Similarly, the components in the switch oil tank 7 are immersed in the heat dissipation oil. The switch oil tank 7 is used for the connection of the main cable. Immersing in the heat dissipation oil can greatly reduce the generation of arcs. The electrical chamber 12 is provided with external terminals, as well as control circuits, relays, contactors and other components.

[0045] The switch oil tank 7 includes a shell 701, which is square in shape. The first clamping contact 703 and the second clamping contact 707 are arranged in upper and lower positions inside the shell 701. A fixing plate 705 is arranged between the first clamping contact 703 and the second clamping contact 707. A clip 704 is inserted on the fixing plate 705. The clip 704 cooperates with the first clamping contact 703 and the second clamping contact 707 at the corresponding position, that is, the number of the clips 704 corresponds to the number of the first clamping contact 703 and the second clamping contact 707, and the clip 704 can be clamped and fixed by the first clamping contact 703 and the second clamping contact 707 to be conductive.

[0046] A second electric cylinder 714 is fixedly connected to the inside of the shell 701, and a second telescopic rod 711 is extended from the lower end of the second electric cylinder 714. The second telescopic rod 711 passes through the middle of the fixed plate 705 and is movably arranged with the fixed plate 705, that is, in the current state, the activities of the fixed plate 705 and the second telescopic rod 711 do not affect each other, and the side wall of the second telescopic rod 711 is fixedly connected with a first baffle ring 710 and a second baffle ring 712, and the fixed plate 705 is located between the first baffle ring 710 and the second baffle ring 712, that is, during the upward movement of the second telescopic rod 711, if the first baffle ring 710 or the second baffle ring 712 contacts the fixed plate 705, and as the second telescopic rod 711 continues to move, the fixed plate 705 can be moved in the up and down directions, that is, the second telescopic rod 711 can be moved. When the first telescopic rod 711 is retracted, the first retaining ring 710 supports the fixed plate 705 and makes the fixed plate 705 move upward, so that the clip 704 and the second clamping contact 707 are in contact and electrically connected. On the contrary, the second telescopic rod 711 is extended, and the second retaining ring 712 presses the fixed plate 705 downward, so that the fixed plate 705 moves downward, that is, the clip 704 and the second clamping contact 707 are separated. In this process, the clip 704 and the first clamping contact 703 remain in contact. The second telescopic rod 711 is sleeved with a spring 713, one end of the spring 713 abuts against the second electric cylinder 714, and the other end of the spring 713 abuts against the fixed plate 705. When the fixed plate 705 is in the upper position, that is, the clip 704 and the second clamping contact 707 are in contact and electrically connected, and the spring 713 is compressed to store elastic potential energy. The second electric cylinder 714 serves as a control member for the contact between the clip 704 and the second clamping contact 707.

[0047] A triangular block 715 is fixedly connected to the inner wall of the shell 701, and a push rod 716 is extended from the end of the fixed plate 705. One end of the push rod 716 is provided with upward and downward inclined surfaces, and the end is against the triangular block 715. The fixed triangular block 715 is also provided with an upward inclined surface and a downward inclined surface. When the fixed plate 705 is in the upper state, the downward inclined surface of the push rod 716 contacts the upward inclined surface of the triangular block 715. When the fixed plate 705 is in the lower state, the upward inclined surface of the push rod 716 contacts the downward inclined surface of the triangular block 715. A float 709 is provided below the end of the fixed plate 705. When the float 709 is immersed in the heat dissipation oil, it provides buoyancy. A top block 717 is fixedly connected to the middle part of the upper end of the float 709. The floating float 709 pushes the top block 717 upward. A stopper is also provided at the upper end, and the top block 717 has a certain upward and downward movable distance. When there is no heat dissipation oil in the housing 701, the float 709 is prevented from falling off the fixed plate 705. The top block 717 penetrates the fixed plate 705. The upper end of the top block 717 is provided with an inclined surface, and cooperates with the inclined surface provided at one end of the push rod 716. When the float 709 provides buoyancy, the inclined surface is passed between the top block 717 and the push rod 716, pushing the push rod 716 away from the second telescopic rod 711, so that the push rod 716 and the triangular block 715 are tightly abutted against each other, maintaining the upper state of the fixed plate 705. The inner bottom wall of the housing 701 is fixedly connected with the overflow valve 702, and the overflow valve 702 is connected to the oil chamber 8. A heat pipe 708 is provided inside the housing 701, and the other end of the heat pipe 708 extends to the inside of the transformer chamber 13. During the operation of the substation, the heat pipe 708 can conduct the heat in the transformer chamber 13 to the inside of the shell 701, and the clip 704, the first clamping contact 703, and the second clamping contact 707 will also generate heat during the electrical connection process. When the substation is continuously overloaded, the pressure in the shell 701 increases, the overflow valve 702 is connected, and the heat dissipation oil is sent to the oil chamber 8. At this time, the height of the float 709 drops, the push rod 716 is not restricted by the top block 717, and the fixed plate 705 changes from the upper state to the lower state under the action of the spring 713, that is, the clip 704 and the second clamping contact 707 are separated.

[0048] The front sides and upper edges of the box body 3 are rotatably connected with side panels 1, and the front panels 2 are movably arranged inside the side panels 1. The box door is rotatably connected to the front panels 2. The side panels 1 can be rotated open and the front panels 2 can be pulled forward to increase the space for wiring operations at the front end of the box body 3. During transportation, the side panels 1 can be folded to facilitate the transportation of the substation.

[0049] The edge of the front panel 2 is fixedly connected with a fixing rod 19, which is inserted into the interior of the box body 3, and the end thereof is fixedly connected with a baffle 21, and a fixing nut 20 is threadedly connected to the fixing rod 19, and the fixing nut 20 and the baffle 21 are arranged to clamp the box body 3. After the front panel 2 is pulled out, the baffle 21 contacts the inner wall of the box body 3, and the fixing nut 20 is tightened against the outer wall of the box body 3 to fix the front panel 2.

[0050] A heat dissipation mechanism 6 is fixedly connected to the back of the box body 3 for heat dissipation during operation of the substation. The heat dissipation mechanism 6 includes a first slot plate 602 and a second slot plate 605, and the first slot plate 602 is sleeved on the second slot plate 605, which can greatly reduce the size of the entire substation and facilitate transportation. A second cross-flow fan 603 is fixedly connected to one end of the first slot plate 602, and a second air duct is formed between the second slot plate 605 and the box body 3, and the second cross-flow fan 603 is used for air flow in the second air duct to achieve air cooling. One end of the second slot plate 605 is fixedly connected to the first cross-flow fan 601, and a first electric cylinder 608 is fixedly connected to the interior of the transformer chamber 13. The first electric cylinder 608 is provided with four, and one end extends A first telescopic rod 607 is extended, and the end of the first telescopic rod 607 is fixedly connected to the corner of the first slot plate 602. The first electric cylinder 608 is started and the first telescopic rod 607 is extended, thereby forming a first air duct between the first slot plate 602 and the second slot plate 605. The second cross-flow fan 603 is used for the air flow in the first air duct. When the first slot plate 602 is sleeved on the second slot plate 605, the second cross-flow fan 603 can also enhance the air flow in the second air duct. The cross-sectional structure of the first slot plate 602 and the second slot plate 605 is similar to the cross-sectional profile of the channel steel, and when the first slot plate 602 is sleeved on the second slot plate 605, the air outlet of the second cross-flow fan 603 is located at the end of the second air duct.

[0051] The inner wall of the first slot plate 602 is fixedly connected with heat dissipation columns 604, which penetrate the second slot plate 605. The inner wall of the second slot plate 605 is fixedly connected with heat dissipation fins 606 at equal distances, and the heat dissipation fins 606 and the heat dissipation columns 604 are staggered. When the air passes through the first air duct and the second air duct, the heat on the heat dissipation columns 604 and the heat dissipation fins 606 is taken away.

[0052] The first slot plate 602 and the second slot plate 605 are both provided with oil passages 609, the second oil pump 15 is fixedly connected to the inside of the transformer chamber 13, the output end of the second oil pump 15 is fixedly connected to the oil delivery pipe 14, the oil delivery pipe 14 is connected to one end of the oil passage 609, and the other end of the oil passage 609 is connected to the transformer chamber 13. The second oil pump 15 is started to pump the heat dissipation oil in the transformer chamber 13 to the oil passage 609 through the oil delivery pipe 14, and the heat is transferred to the heat dissipation column 604 and the heat sink 606, and the heat dissipation of the substation is realized under the flow of air.

[0053] The four corners of the bottom plate 5 are provided with through holes, and the through holes are interspersed with embedded screws 4, and the threads on the embedded screws 4 are matched with limit nuts, and the limit nuts are set above and below the bottom plate 5. The embedded screws 4 are fixed, and then the limit nuts are matched to clamp and fix the bottom plate 5 on the embedded screws 4, and finally the box body 3 is fixed on the bottom plate 5.

[0054] A plurality of wiring terminals 706 are fixedly connected to the side wall of the switch oil box 7, and the wiring terminals 706 are electrically connected to the corresponding second clamping contacts 707. The wiring terminals 706 are used to connect external high-voltage cables.

[0055] The interior of the oil chamber 8 is connected to a first oil pump 10, the output end of the first oil pump 10 is fixedly connected to a main pipe 11, the main pipe 11 extends to the transformer chamber 13, the main pipe 11 is fixedly connected to a branch pipe 17, and the branch pipe 17 extends to the interior of the switch oil tank 7. The first oil pump 10 pumps the heat dissipation oil in the oil chamber 8 to the transformer chamber 13 and the switch oil tank 7 through the main pipe 11 and the branch pipe 17.

[0056] The main pipe 11 is fixedly connected with a first valve 16, the branch pipe 17 is located between the first valve 16 and the first oil pump 10, and the branch pipe 17 is fixedly connected with a second valve 18. The first valve 16 is opened for the workers in the pressure-changing chamber 13, and the second valve 18 is opened for the oil supply to the oil tank 7.

[0057] Working principle: fix it with the embedded screw 4, then use the limit nut to clamp the bottom plate 5 on the embedded screw 4, and finally fix the box body 3 on the bottom plate 5, then rotate the side panel 1, pull out the front panel 2, and fix the front panel 2 with the fixing nut 20, and fill the gaps between the side panel 1, the front panel 2 and the box body 3 with sealant, open the box door, and connect the wires.

[0058] When the substation is working, the heat pipe 708 can transfer the heat in the transformer chamber 13 to the inside of the shell 701, and the clip 704, the first clamping contact 703, and the second clamping contact 707 will also generate heat during the electrical connection process. When the substation is continuously overloaded, the heat dissipation oil in the shell 701 evaporates, causing the pressure to increase, and the overflow valve 702 is turned on to send the heat dissipation oil to the oil chamber 8. At this time, the height of the float 709 drops, the push rod 716 is not restricted by the top block 717, and the fixed plate 705 is changed from the upper state to the lower state under the action of the spring 713, that is, the clip 704 and the second clamping contact 707 are separated.

[0059] When the substation is working, the first cross-flow fan 601 is started, and the air passes through the second air duct to take away the heat on the heat dissipation column 604 and the heat dissipation fin 606. At this time, the heat dissipation column 604 is inserted into the second air duct. If the heat dissipation is insufficient, the first electric cylinder 608 is actuated to send the first slot plate 602 out to form the first air duct, and the second cross-flow fan 603 is engaged to work, forming a double-duct heat dissipation as a whole, thereby improving the heat dissipation efficiency.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high voltage prefabricated substation, characterized in that: include: A bottom plate (5), wherein the middle portion of the upper end of the bottom plate (5) is fixedly connected to a box body (3), wherein an oil chamber (8), a switch oil box (7), an electrical chamber (12) and a transformer chamber (13) are arranged inside the box body (3), wherein the oil chamber (8) is located at the bottom, the switch oil box (7) is located directly below the electrical chamber (12), and the switch oil box (7), the electrical chamber (12) and the transformer chamber (13) are arranged side by side, and a transformer assembly (9) is fixedly connected inside the transformer chamber (13); The switch oil box (7) comprises a shell (701), wherein a first clamping contact (703) and a second clamping contact (707) are arranged in an upper and lower position inside the shell (701), a fixing plate (705) is arranged between the first clamping contact (703) and the second clamping contact (707), a clip (704) is inserted on the fixing plate (705), and the clip (704) cooperates with the first clamping contact (703) and the second clamping contact (707) at corresponding positions, and a second electric cylinder (714) is fixedly connected to the inside of the shell (701), and the lower end of the second electric cylinder (714) extends A second telescopic rod (711) is extended and arranged, the second telescopic rod (711) passes through the middle part of the fixed plate (705) and is movably arranged with the fixed plate (705), the side wall of the second telescopic rod (711) is fixedly connected with a first retaining ring (710) and a second retaining ring (712), the fixed plate (705) is located between the first retaining ring (710) and the second retaining ring (712), the second telescopic rod (711) is sleeved with a spring (713), one end of the spring (713) abuts against the second electric cylinder (714), and the other end of the spring (713) abuts against the fixed plate (705); The inner wall of the housing (701) is fixedly connected with a triangular block (715), the end of the fixed plate (705) is extended with a push rod (716), one end of the push rod (716) is provided with an upward and downward inclined surface, and the end is against the triangular block (715), a float (709) is provided below the end of the fixed plate (705), and a top block (717) is fixedly connected to the middle of the upper end of the float (709), and the top block (717) is provided at the bottom of the fixed plate (705). 17) passes through the fixed plate (705), the upper end of the top block (717) is provided with an inclined surface, and cooperates with the inclined surface provided at one end of the push rod (716), the inner bottom wall of the shell (701) is fixedly connected with an overflow valve (702), and the overflow valve (702) is connected to the oil chamber (8), and a heat pipe (708) is provided inside the shell (701), and the other end of the heat pipe (708) extends to the inside of the transformer chamber (13).

2. A high voltage prefabricated substation according to claim 1, characterized in that: The front sides and the upper edge of the box body (3) are both rotatably connected to side panels (1), the interior of the side panels (1) is movably provided with a front panel (2), and the front panel (2) is rotatably connected to a box door.

3. A high voltage prefabricated substation according to claim 2, characterized in that: A fixing rod (19) is fixedly connected to the edge of the front plate (2), the fixing rod (19) is inserted into the interior of the box body (3), and a baffle (21) is fixedly connected to the end thereof, a fixing nut (20) is threadedly connected to the fixing rod (19), and the fixing nut (20) and the baffle (21) are arranged to clamp the box body (3).

4. A high voltage prefabricated substation according to claim 1, characterized in that: A heat dissipation mechanism (6) is fixedly connected to the back of the box body (3), and the heat dissipation mechanism (6) includes a first slot plate (602) and a second slot plate (605), and the first slot plate (602) is sleeved on the second slot plate (605), one end of the first slot plate (602) is fixedly connected to the second cross-flow fan (603), and one end of the second slot plate (605) is fixedly connected to the first cross-flow fan (601), and the inside of the transformer chamber (13) is fixedly connected to a first electric cylinder (608), four first electric cylinders (608) are provided, and a first telescopic rod (607) is extended from one end, and the end of the first telescopic rod (607) is fixedly connected to the corner of the first slot plate (602).

5. A high voltage prefabricated substation according to claim 4, characterized in that: The inner wall of the first slot plate (602) is fixedly connected with heat dissipation columns (604), the heat dissipation columns (604) penetrate the second slot plate (605), the inner wall of the second slot plate (605) is fixedly connected with heat dissipation fins (606) at equal distances, and the heat dissipation fins (606) and the heat dissipation columns (604) are staggered.

6. A high voltage prefabricated substation according to claim 5, characterized in that: The first groove plate (602) and the second groove plate (605) are both provided with oil passages (609), the interior of the transformer chamber (13) is fixedly connected to a second oil pump (15), the output end of the second oil pump (15) is fixedly connected to an oil delivery pipe (14), the oil delivery pipe (14) is connected to one end of the oil passage (609), and the other end of the oil passage (609) is connected to the transformer chamber (13).

7. A high voltage prefabricated substation according to claim 1, characterized in that: The four corners of the base plate (5) are provided with through holes, and embedded screw rods (4) are inserted into the through holes. The embedded screw rods (4) are threadedly provided with limit nuts, and the limit nuts are provided above and below the base plate (5).

8. A high voltage prefabricated substation according to claim 1, characterized in that: A plurality of wiring terminals (706) are fixedly connected to the side wall of the switch oil box (7), and the wiring terminals (706) are electrically connected to the second clamping contacts (707) at corresponding positions.

9. A high voltage prefabricated substation according to claim 1, characterized in that: The interior of the oil chamber (8) is connected to a first oil pump (10), the output end of the first oil pump (10) is fixedly connected to a main pipe (11), the main pipe (11) extends into the transformer chamber (13), the main pipe (11) is fixedly connected to a branch pipe (17), and the branch pipe (17) extends into the interior of the switch oil box (7).

10. A high voltage prefabricated substation according to claim 9, characterized in that: The main pipe (11) is fixedly connected to a first valve (16), the branch pipe (17) is located between the first valve (16) and the first oil pump (10), and the branch pipe (17) is fixedly connected to a second valve (18).

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