A prefabricated substation

Abstract

The application provides a prefabricated transformer substation, which comprises a transformer substation body, the transformer substation body comprises a base, universal wheels are installed on the bottom of the base, the universal wheels comprise a wheel frame and a wheel body, the wheel frame is hingedly installed on the lower part of the base to drive the wheel body to swing up and down, the base is provided with an avoiding structure, the wheel body has a supporting position and a ground-leaving position on the swinging stroke of the wheel body, the wheel frame is provided with a wheel frame locking structure and a wheel frame unlocking structure, the transformer substation body further comprises rolling bodies, the rolling bodies are used for forming rolling drums in cooperation with the wheel body when the wheel body is in the ground-leaving position, and the rolling bodies and the wheel body are correspondingly arranged on each side of the base, so that the projection of the rolling drums on each side of the base in the up-down direction encloses a closed figure. The prefabricated transformer substation can effectively solve the technical problem that animals easily enter the interior of the prefabricated transformer substation to cause damage due to the lack of a protection device in the prior art.

Description

Technical Field

[0001] This invention relates to a prefabricated substation, belonging to the field of substation technology. Background Technology

[0002] Prefabricated substations, also known as box-type substations or prefabricated transformer substations, are factory-prefabricated, compact indoor and outdoor power distribution equipment that integrates high-voltage switchgear, distribution transformers, and low-voltage power distribution devices, arranged according to a specific wiring scheme. In other words, they organically combine electrical equipment with functions such as voltage reduction and low-voltage power distribution. Prefabricated substations achieve electrical connections via cables or busbars. All high- and low-voltage power distribution devices and transformers are conventional, standardized products. They represent a new type of substation that has emerged after traditional civil engineering substations. Prefabricated substations have replaced traditional civil engineering distribution rooms and substations, becoming a new type of complete power distribution system. Due to their advantages such as small size, small footprint, light weight, and low cost, prefabricated substations are widely used in urban power grid construction and renovation, mines, factories, oil and gas fields, and wind power stations.

[0003] Existing prefabricated substations have some problems in application, specifically: 1. Most existing prefabricated substations are located in large open areas, which are home to many animals, such as rodents. The high cost of real-time inspection in these open areas makes it easy for some animals to climb into the prefabricated substation and damage the internal electrical components, causing the prefabricated substation to malfunction; 2. If the high and low voltage circuit breakers are damaged, the substation is prone to fire due to abnormal heat, leading to a larger safety accident. Summary of the Invention

[0004] The purpose of this invention is to provide a prefabricated substation to solve the technical problem that animals can easily enter and damage the interior of prefabricated substations due to the lack of protective devices in existing prefabricated substations.

[0005] The prefabricated substation in this invention adopts the following technical solution:

[0006] The prefabricated substation includes a substation body, which includes a base. A caster wheel is mounted on the bottom of the base. Each caster wheel includes a wheel frame and a wheel body. The wheel frame is hinged to the lower part of the base to drive the wheel body to swing up and down. The base has a clearance structure to allow the wheel body to avoid contact with the ground during swinging. The wheel body has a support position for contact with the ground support and an off-center position located on the upper side of the base during its swing stroke. The wheel frame has a wheel frame locking structure and a wheel frame unlocking structure. The wheel frame locking structure locks the wheel frame when the wheel body is in the support or off-center position. The wheel frame unlocking structure unlocks the wheel frame when the wheel body switches between the support and off-center positions. The substation body also includes rolling elements. The rolling elements cooperate with the wheel body to form a roller when the wheel body is in the off-center position. The rolling elements and the wheel body are arranged correspondingly on each side of the base so that the projections of the rollers on each side of the base in the vertical direction form a closed shape.

[0007] Beneficial Effects: This invention provides an improved prefabricated substation. The usage process of the prefabricated substation is as follows: When moving, the wheels are swung to the support position via the wheel frame, and the wheel frame is locked by the wheel frame locking structure. After the prefabricated substation moves to the designated position, the wheel frame is first unlocked by the wheel frame unlocking structure. Then, the wheels are swung to the off-position via the wheel frame, and the wheel frame is locked by the wheel frame locking structure. Next, the wheels on the same side of the base cooperate with the rolling elements to form rollers. The projections of the rollers formed on each side of the base in the vertical direction form a closed shape. Since the rollers cannot provide adhesion to animals climbing into the substation body, they can effectively prevent animals from climbing into the substation body. In addition, the projections of each roller in the vertical direction together form a closed shape, which can provide comprehensive protection in the circumference of the prefabricated substation and avoid blind spots.

[0008] Furthermore, the rolling element is a telescopic cylinder.

[0009] Beneficial effects: When in use, the telescopic cylinder can extend to cooperate with the wheel to form a roller, and after use, it can be shortened to save storage space.

[0010] Furthermore, the telescopic cylinder is embedded in the side of the wheel body.

[0011] Beneficial effects: The telescopic cylinder is more convenient to fit into the wheel body after being embedded in it, and the telescopic cylinder can be retracted and stored when not in use, with less interference to the wheel body.

[0012] Furthermore, each side of the base is provided with two universal wheels, and each universal wheel is provided with a telescopic cylinder. At the opposite ends of the two telescopic cylinders on the same side of the base, there is a telescopic cylinder connecting structure for connecting the two telescopic cylinders, so that the two telescopic cylinders and the two wheels on the same side of the base together form the rollers on the corresponding sides.

[0013] Beneficial effects: When in use, adjust the corresponding wheels on each side of the base to their respective distance positions. Then, connect the two telescopic cylinders on the same side of the base through the telescopic cylinder connection structure. The two telescopic cylinders and the two wheels together form a roller on the corresponding side to protect animals. When it is necessary to move the prefabricated substation, first disconnect the two telescopic cylinders on the same side of the base, and then adjust the corresponding wheels on each side of the base to their respective support positions to support the movement of the substation. It is very convenient to use.

[0014] Furthermore, the telescopic cylinder connection structure includes a snap-fit ​​rod and a snap-fit ​​hole into which the snap-fit ​​rod extends. A snap-fit ​​rod is hinged to the opposite end of one of the two telescopic cylinders on the same side, and a snap-fit ​​hole is arranged on the opposite end of the other. The extension direction of the snap-fit ​​hole is consistent with the telescopic direction of the telescopic cylinder it is located in. A fixed sleeve and a sliding sleeve are fitted on the outer circumferential surface of the snap-fit ​​hole. The fixed sleeve and the sliding sleeve are connected by an elastic element. A snap-fit ​​groove is provided on the end of the fixed sleeve facing the sliding sleeve. The snap-fit ​​rod has a snap-fit ​​section. A snap-fit ​​through hole communicating with the snap-fit ​​groove is provided on the wall of the snap-fit ​​hole. The snap-fit ​​section extends into the snap-fit ​​groove through the snap-fit ​​through hole. The sliding sleeve is used to press the snap-fit ​​section into the snap-fit ​​groove.

[0015] Beneficial effects: When connecting and fixing the two telescopic cylinders, first slide the sliding sleeve to the side opposite to the fixed sleeve, then insert the locking rod into the locking hole and let the locking section extend into the locking groove through the locking through hole. Then, release the sliding sleeve, and the sliding sleeve, under the action of the elastic element, presses the locking section into the locking groove, thus connecting and fixing the two telescopic cylinders. When separating the two telescopic cylinders, first slide the sliding sleeve to the side opposite to the fixed sleeve, then let the locking section exit from the locking groove and let the locking rod exit from the locking hole, thus separating the two telescopic cylinders. It is very convenient to use and has good connection stability.

[0016] Furthermore, the wheel frame includes a support rod, one end of which is hinged to the base, and the other end is used to rotatably mount the wheel.

[0017] Beneficial effect: Using a support rod as a wheel frame makes it easier to adjust the wheel's oscillation.

[0018] Furthermore, the wheel frame is provided with a mounting cavity, in which an elastic plate is installed. A mounting through hole is provided on the side of the mounting cavity facing the base, and a locking tongue is provided in the mounting through hole. The locking tongue is connected and fixed to the elastic plate. The base is provided with a first locking hole and a second locking hole for the locking tongue to extend into. When the wheel swings to the support position, the locking tongue, driven by the elastic plate, extends into the first locking hole to lock the wheel frame. When the wheel swings to the off-position, the locking tongue, driven by the elastic plate, extends into the second locking hole to lock the wheel frame. A pulling structure is connected to the elastic plate. The pulling structure is used to pull the elastic plate to deform during unlocking, so that the locking tongue exits from the corresponding locking hole. The locking tongue and the elastic plate form the wheel frame locking structure, and the pulling structure forms the wheel frame unlocking structure.

[0019] Beneficial effects: The wheel frame locking structure adopts the form of a locking tongue and an elastic plate, which has the characteristics of simple structure and high stability; the wheel frame unlocking structure adopts a pull structure, which has the characteristics of simple structure and convenient installation.

[0020] Furthermore, the first locking hole and the second locking hole are provided with limiting grooves on the hole walls, and a limiting rod is hingedly installed on the lock tongue. An elastic driving member is arranged between the limiting rod and the lock tongue to drive the limiting rod to swing away from the lock tongue. The swing end of the limiting rod is provided with a limiting structure for cooperating with the limiting groove.

[0021] Beneficial effects: When the locking tongue is inserted into the first or second locking hole, the limiting rod swings away from the locking tongue under the drive of the elastic drive component. The limiting structure at the swing end of the limiting rod cooperates with the limiting groove to lock the locking tongue, ensuring that the locking tongue will not come out of the corresponding locking hole, thus enhancing the reliability of locking the wheel frame.

[0022] Furthermore, the substation body is equipped with a protective device, which includes a protective frame. The protective frame has a support plate for supporting and placing high and low voltage circuit breakers. Ceramic side baffles and ceramic top baffles are arranged on the support plate. The ceramic side baffles are arranged on opposite sides of the high and low voltage circuit breakers, and the ceramic top baffles are arranged on the upper side of the high and low voltage circuit breakers. The support plate, ceramic side baffles and ceramic top baffles together form a protective cavity for installing high and low voltage circuit breakers.

[0023] Beneficial effects: In the event of a fire inside a substation, the protective cavity formed by the support plate, ceramic side baffle, and ceramic upper baffle can protect the high and low voltage circuit breakers, preventing them from being affected by the external environment.

[0024] Furthermore, the protective device also includes a heat transfer plate and an inflatable airbag containing an insulating extinguishing agent. The inflatable airbag is arranged on the side of the ceramic side baffle facing away from the high and low pressure air switches. The heat transfer plate is attached to the side of the inflatable airbag facing away from the ceramic side baffle. The support plate, ceramic side baffle, and ceramic upper baffle are in heat transfer contact with the heat transfer plate. The ceramic side baffle is provided with extinguishing holes. The inflatable airbag and the protective cavity are connected through the extinguishing holes so that the insulating extinguishing agent can enter the protective cavity after the inflatable airbag bursts due to heat.

[0025] Beneficial effects: When high and low voltage circuit breakers experience high temperatures or catch fire, the support plate, ceramic side baffle, and ceramic upper baffle transfer the heat in the protective chamber to the expansion airbag through the heat transfer plate. After the expansion airbag expands due to heat, it bursts open, and the insulating fire extinguishing agent inside the expansion airbag enters the protective chamber through the fire extinguishing hole, which plays a role in extinguishing or preventing fires in the high and low voltage circuit breakers in the protective chamber. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the prefabricated substation of the present invention;

[0027] Figure 2 This is a schematic diagram of a prefabricated substation with the wheel body in an off-center position (only the wheel body on one side of the base is shown in the diagram);

[0028] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a structural diagram of the telescopic cylinder connection structure;

[0030] Figure 5 This is a schematic diagram showing the wheel frame locked in an off-center position.

[0031] Figure 6 yes Figure 5 Enlarged view of point B in the middle;

[0032] Figure 7 This is a schematic diagram showing the state of the locking tongue extending into the corresponding locking hole;

[0033] Figure 8 yes Figure 7 Enlarged view of point C in the middle;

[0034] Figure 9 This is a schematic diagram of the internal protection device of the substation.

[0035] Figure 10 yes Figure 9 Enlarged view of point D in the middle;

[0036] Figure 11 This is a schematic diagram of the pressure regulating mechanism installed on the protective device;

[0037] Figure 12 yes Figure 11 Enlarged view at point E in the middle;

[0038] Figure 13 This is a schematic diagram of the internal structure of the substation.

[0039] Figure 14 This is a schematic diagram of the structure inside the protective cavity.

[0040] The names of the components corresponding to the corresponding reference numerals in the figure are:

[0041] 100. Substation body; 101. Base; 102. Casters; 103. Wheel frame; 104. Wheel body; 105. Telescopic cylinder; 106. Clearance groove; 107. Roller; 108. Receiving groove; 109. Snap-fit ​​rod; 110. Snap-fit ​​section; 111. Snap-fit ​​hole; 112. Fixing sleeve; 113. Sliding sleeve; 114. Tension spring; 115. Snap-fit ​​groove; 116. Snap-fit ​​through hole; 117. Locking tongue; 118. Arc-shaped spring; 119. Mounting cavity; 120. Mounting through hole; 121. Pull rope; 122. Pull ring; 123. Limiting groove; 124. Limiting rod; 125. Limiting block; 126. Compression spring; 127. Protective frame; 128. Support plate ; 129. Ceramic side baffle; 130. Ceramic top baffle; 131. Heat transfer plate; 132. Inflatable airbag; 133. Fire extinguishing hole; 134. Heat-conducting plate; 135. Mounting rod; 136. Broken part; 137. Adjusting threaded sleeve; 138. Top support ring; 139. Top support ring drive mechanism; 140. Top support rod; 141. Hinge rod; 142. Screw sleeve; 143. Screw; 144. Air duct; 145. Air inlet; 146. Air outlet; 147. Suction fan; 148. Suction port; 149. Rain shield; 150. Drive motor; 151. Exhaust fan blade; 152. Exhaust chamber; 153. Exhaust duct; 154. Flexible air outlet sleeve; 155. Air vent. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0044] It should be noted that, in specific embodiments of the present invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the use of phrases such as "comprising a…" to define an element does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] In the description of this invention, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the body, or it can be separately arranged from the body and connected to the body. This connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0047] The present invention will be further described in detail below with reference to embodiments.

[0048] Example 1 of the prefabricated substation in this invention:

[0049] like Figure 1 and Figure 2As shown, the prefabricated substation provided in this embodiment includes a substation body 100 with internal high and low voltage circuit breakers (not shown in the figure). The substation body 100 includes a base 101 and rolling elements. A caster wheel 102 is installed on the lower side of the base 101. The caster wheel 102 includes a wheel frame 103 and a wheel body 104. The wheel body 104 can swing vertically via the wheel frame 103, and has a support position and a free position during its swing stroke. When the prefabricated substation needs to be moved, the wheel body 104 is adjusted to the support position so that the wheel body 104 can move the prefabricated substation. After the prefabricated substation is placed in a fixed position, the wheel body 104 is adjusted to the free position. The wheel body 104 and the rolling elements cooperate on each side of the base 101 to form rollers 107 to protect the prefabricated substation.

[0050] In this embodiment, as Figure 3 As shown, the wheel frame 103 includes a support rod, one end of which is hinged to the lower part of the base 101, and the other end is provided with a wheel seat. A wheel body 104 is rotatably mounted on the wheel seat. The wheel body 104 swings in the up and down direction via the support rod. The wheel body 104 has a support position for contacting the ground support and a position away from the base 101 on its swing stroke. The base 101 is provided with a clearance structure, specifically a clearance groove 106, to avoid the wheel body 104 when it swings to the position away from the base.

[0051] In this embodiment, as Figure 1 and Figure 2 As shown, two casters 102 are arranged on each side of the base 101, and the rolling element is a telescopic cylinder 105. A telescopic cylinder 105 is embedded in the side of the wheel body 104 of each caster 102. Figure 2 As shown, when the two wheels 104 on the same side of the base 101 are in the off-center position, the telescopic cylinders 105 on the two wheels 104 are coaxially arranged. A telescopic cylinder connecting structure is provided at the opposite ends of the two telescopic cylinders 105 to connect them, so that the two telescopic cylinders 105 on the same side of the base 101 and the two wheels 104 together form a roller 107 on the corresponding side. In this embodiment, a laterally extending receiving groove 108 is provided on the side wall of the substation body 100 to allow the roller 107 on the corresponding side wall to rotate within it.

[0052] In this embodiment, as Figure 4As shown, the telescopic cylinder connection structure includes a snap-fit ​​rod 109 and a snap-fit ​​hole 111 into which the snap-fit ​​rod 109 extends. The snap-fit ​​rod 109 is hinged to the opposite end of one of the two telescopic cylinders 105 on the same side, and the snap-fit ​​hole 111 is arranged on the opposite end of the other. The extension direction of the snap-fit ​​hole 111 is consistent with the extension direction of the telescopic cylinder 105 to which it is located. A fixed sleeve 112 and a sliding sleeve 113 are fitted on the outer circumferential surface of the snap-fit ​​hole 111. The fixed sleeve 112 and the sliding sleeve 113 are connected by an elastic element, specifically a tension spring 114. A snap-fit ​​groove 115 is provided on the fixed sleeve 112 facing the sliding sleeve 113. A snap-fit ​​through hole 116 communicating with the snap-fit ​​groove 115 is provided on the hole wall of the snap-fit ​​hole 111. A snap-fit ​​section 110 is provided on the snap-fit ​​rod 109 facing the snap-fit ​​hole 111. The snap-fit ​​section 110 is an L-shaped rod structure.

[0053] In this embodiment, when the two connecting cylinders on the same side of the base 101 need to be connected, the locking rod 109 is first inserted into the locking hole 111, then the sliding sleeve 113 is slid away from the fixed sleeve 112, and then the locking section 110 of the locking rod 109 is inserted into the locking groove 115 through the locking through hole 116. Then the sliding sleeve 113 is released, and the sliding sleeve 113 slides towards the fixed sleeve 112 under the action of the elastic element, so that the sliding sleeve 113 presses the locking section 110 into the locking groove 115. At this time, the two connecting cylinders are connected, and the two connecting cylinders and the corresponding two wheel bodies 104 form a roller 107. The rolling axis of the roller 107 extends laterally to form protection on the corresponding side of the base 101.

[0054] In this embodiment, in order to keep the wheel 104 in the supported position or the unsupported position, the wheel frame 103 is provided with a wheel frame locking structure and a wheel frame unlocking structure. The wheel frame locking structure is used to lock the wheel frame 103 when the wheel 104 is in the supported position or the unsupported position, and the wheel frame unlocking structure is used to unlock the wheel frame 103 when the wheel 104 switches between the supported position and the unsupported position.

[0055] In this embodiment, as Figure 5 and Figure 6As shown, the wheel frame locking structure includes a locking tongue 117 and an elastic element, and the wheel frame unlocking structure includes a pulling structure. Specifically, the wheel frame 103 has a mounting cavity 119, and a mounting through hole 120 is provided on the side of the mounting cavity 119 facing the base 101. The locking tongue 117 is movably installed in the mounting through hole 120. An elastic element is connected to the side of the locking tongue 117 facing the mounting cavity 119. The elastic element is an arc-shaped spring piece 118, and there are two arc-shaped spring pieces 118 arranged interlockingly in the mounting cavity 119. The base 101 has a first locking hole (not shown in the figure) and a second locking hole (not shown in the figure) for the locking tongue 117 to extend into. When the wheel body 104 swings to the support position, the first locking hole and the mounting through hole 120 are arranged opposite each other, and the locking tongue 117 extends into the first locking hole under the drive of the elastic piece to lock the wheel frame 103. When the wheel 104 swings to the off-position, the second locking hole and the mounting through hole 120 are aligned. The locking tongue 117, driven by the elastic plate, extends into the second locking hole to lock the wheel frame 103. The pulling structure is specifically a pulling rope 121. Two pulling ropes 121 are arranged corresponding to the two arc-shaped springs 118. One end of the pulling rope 121 is fixed to the convex side of the corresponding arc-shaped spring 118, and the other end passes through the mounting cavity 119 and is tied with a pulling ring 122. When the wheel 104 needs to switch between the support position and the off-position, the pulling rope 121 is pulled to cause the arc-shaped spring 118 to deform, so that the arc-shaped spring 118 drives the locking tongue 117 to exit from the corresponding locking hole. At this time, the wheel frame 103 is in the unlocked state, and the wheel 104 can switch normally between the support position and the off-position.

[0056] In this embodiment, to prevent locking failure due to the locking tongue 117 dislodging from the first and second locking holes, such as... Figure 7 and Figure 8As shown, the first locking hole and the second locking hole are provided with limiting grooves 123. A limiting rod 124 is hinged on the locking tongue 117. An elastic driving member is arranged between the limiting rod 124 and the locking tongue 117 to drive the limiting rod 124 to swing away from the locking tongue 117. The elastic driving member is specifically a compression spring 126. The swing end of the limiting rod 124 is provided with a limiting structure for cooperating with the limiting groove 123. The limiting structure is specifically a limiting block 125. When the wheel frame 103 is not locked, the limiting rod 124 is in the mounting hole 120. Under the constraint of the hole wall of the mounting hole 120, the compression spring 126 is in a compressed and stored state. When locking the wheel frame 103, the locking tongue 117 extends into the corresponding locking hole under the action of the arc-shaped spring 118. At this time, the limiting rod 124 also extends out of the mounting hole 120. Driven by the compression spring 126, the limiting rod 124 swings away from the locking tongue 117. The limiting block 125 on the limiting rod 124 engages in the limiting groove 123, thereby locking the locking tongue 117. Therefore, when the locking tongue 117 needs to be withdrawn from the corresponding locking hole, a force is first applied to the limiting rod 124 to drive it to swing towards the locking tongue 117. After the limiting block 125 withdraws from the limiting groove 123, the locking tongue 117 is unlocked.

[0057] In this embodiment, to protect the high and low voltage circuit breakers, such as... Figure 9 and Figure 10 As shown, the substation body 100 is equipped with a protective device, which includes a protective frame 127. The protective frame 127 has a support plate 128 for supporting and placing high and low voltage circuit breakers. The support plate 128 is equipped with a ceramic side baffle 129 and a ceramic upper baffle 130. The ceramic side baffle 129 is arranged on opposite sides of the high and low voltage circuit breakers. The support plate 128, the ceramic side baffle 129 and the ceramic upper baffle 130 together form a protective cavity for installing high and low voltage circuit breakers.

[0058] In this embodiment, to ensure that the high and low voltage circuit breakers can extinguish a fire in a timely manner, such as Figure 9 and Figure 10As shown, the protective device also includes a heat transfer plate 131 and an inflatable airbag 132 containing an insulating fire extinguishing agent. The ceramic side baffle 129 is provided with a fire extinguishing hole 133. The inflatable airbag 132 is arranged on the side of the ceramic side baffle 129 facing away from the high and low pressure air switches. The heat transfer plate 131 is attached to the side of the inflatable airbag 132 facing away from the ceramic side baffle 129. The upper and lower sides of the heat transfer plate 131 are respectively connected to the upper ceramic baffle 130 and the support plate 128 for heat transfer. The left and right sides of the heat transfer plate 131 are respectively connected to the ceramic side baffle 129 for heat transfer through the heat conduction plate 134. When a fire occurs in the high- and low-voltage circuit breaker, the heat in the installation cavity 119 will be transferred to the heat transfer plate 131 through the ceramic upper baffle 130, the support plate 128 and the heat conduction plate 134. The heat transfer plate 131 will transfer the heat to the expansion airbag 132. After the expansion airbag 132 is heated and bursts, the insulating extinguishing agent will enter the protective cavity through the extinguishing hole 133 to extinguish the fire in the high- and low-voltage circuit breaker.

[0059] In this embodiment, to more precisely control the timing of the inflatable airbag 132's rupture, such as... Figure 11 and Figure 12 As shown, the protective device also includes a pressure regulating mechanism, which includes a mounting rod 135. One end of the mounting rod 135 is fixed to the ceramic side baffle 129 facing the inflatable airbag 132, and the other end has an adjusting threaded sleeve 137. The adjusting threaded sleeve 137 is provided with a breakable component 136. By rotating the adjusting threaded sleeve 137, the distance between the breakable component 136 and the inflatable airbag 132 can be adjusted. In use, the distance between the breakable component 136 and the inflatable airbag 132 can be set according to the temperature difference in the region. For example, when the temperature difference in the working environment is large, the breakable component 136 can be adjusted away from the inflatable airbag 132. When the temperature difference in the working environment is small, the breakable component 136 can be adjusted closer to the inflatable airbag 132 to reduce the impact of the temperature difference on the pressure regulating mechanism. This ensures that only when a fire occurs will the inflatable airbag 132 expand to the position where it contacts the breakable component 136, causing the inflatable airbag 132 to be destroyed by the breakable component 136 and burst, thus achieving the fire extinguishing effect.

[0060] In this embodiment, to further ensure that the inflatable airbag 132 can completely explode in the event of a fire, such as Figure 12As shown, the pressure regulating mechanism also includes a top support ring 138 and a top support ring drive mechanism 139. The output end of the top support ring drive mechanism 139 is connected to the top support ring 138 to drive the top support to move laterally toward or away from the inflatable airbag 132. The top support ring drive mechanism 139 includes top support rods 140 and hinge rods 141. Multiple top support rods 140 are arranged axially along the mounting rod 135, specifically four. The hinge rods 141 are hinged to the end of the top support rod 140 facing the inflatable airbag 132. The end of the hinge rod 141 facing away from the top support rod 140 forms the output end of the top support ring drive mechanism 139 and connects to the top support ring 138. A pushing mechanism is arranged between two adjacent hinge rods 141. The pushing mechanism includes a threaded sleeve 142, with screws 143 threaded onto both ends of the threaded sleeve 142. The two screws 143 have opposite directions of rotation and are connected to the corresponding hinge rods 141. When the position of the top support ring 138 needs to be adjusted, rotating the threaded sleeve 142 controls the two screws 143 to move towards or away from each other, thereby causing the hinge rods 141 to swing, which in turn moves the top support ring 138.

[0061] In this embodiment, the top support ring 138 is positioned closer to the expansion airbag 132 than the fragment 136. When the expansion airbag 132 expands due to heat, it first contacts the top support ring 138, and then continues to expand before contacting the fragment 136. Through the compression of the top support ring 138, the expansion airbag 132 can rupture more thoroughly upon explosion. Furthermore, to further enhance the rupture effect, the top support ring 138 is coaxially arranged with the mounting rod 135.

[0062] In this embodiment, the function of the breaking component 136 is to destroy the inflatable airbag 132 so that the insulating fire extinguishing agent inside the inflatable airbag 132 can enter the protective cavity to extinguish the fire of the high and low voltage circuit breakers. Therefore, the breaking component 136 can be a needle, a blade or other structure with a sharp end.

[0063] In this embodiment, to ensure that the insulating extinguishing agent can quickly enter the protective cavity after the inflatable airbag 132 ruptures, such as... Figure 14As shown, a vertically extending air duct 144 is arranged in the protective chamber. The upper end of the air duct 144 has an air inlet 145 with an opening facing downwards, and the lower end has an air outlet 146 communicating with the fire extinguishing hole 133. The size of the air inlet 145 is larger than the size of the air outlet 146. When the temperature inside the protective chamber rises, the hot air inside the protective chamber enters the air duct 144 through the air inlet 145 and then flows out of the air duct 144 through the air outlet 146. Because the size of the air inlet 145 is larger than the size of the air outlet 146 and the air outlet 146 is connected to the fire extinguishing hole 133, the pressure at the end of the fire extinguishing hole 133 facing the protective chamber decreases. According to the principle of siphon effect, the insulating extinguishing agent in the inflatable airbag 132 can enter the protective chamber more quickly, thereby improving the fire extinguishing efficiency. In addition, a flexible air outlet sleeve 154 is provided on the air outlet 146. When the insulating extinguishing agent is sprayed out through the air outlet, the flexible air outlet sleeve 154 can swing up and down, which further improves the actual fire extinguishing effect.

[0064] In this embodiment, to help cool down the high and low voltage circuit breakers inside the substation body 100, such as... Figure 13 As shown, a suction fan 147 is installed above the substation body 100. An air intake 148 communicating with the interior of the substation body 100 is arranged below the suction fan 147. An air guide 155 is provided on the ceramic upper baffle 130, allowing the suction fan 147 to quickly extract hot air from the protective chamber, thus rapidly reducing the temperature inside the protective chamber and further decreasing the probability of a fire. A rain shield 149 is arranged above the suction fan 147 to protect it.

[0065] In this embodiment, to help cool down the high and low voltage circuit breakers inside the substation body 100, such as... Figure 13 As shown, a ventilation system is also installed inside the substation body 100. The ventilation system includes a drive motor 150, a fan blade 151, a ventilation chamber 152, and a ventilation duct 153. The drive motor 150 is located on the outer wall of the substation body 100 and drives a wheel 104 to rotate via gears. When the wheel 104 rotates, it drives the telescopic cylinder 105 to rotate, thereby preventing animals from entering the substation body 100 and damaging the high and low voltage circuit breakers. The ventilation chamber 152 is located on the side wall of the substation body 100. The fan blade 151 is installed in the ventilation chamber 152 and is driven by the telescopic cylinder 105. The ventilation chamber 152 is connected to the interior of the substation body 100 through the ventilation duct 153. When the drive motor 150 is running, it can drive the telescopic cylinder 105 to rotate to prevent animals from entering the substation body 100; on the other hand, it can drive the exhaust fan blades 151 to rotate through the telescopic cylinder 105, which can transport air from outside the substation body 100 into the substation body 100. In conjunction with the suction fan 147, it can achieve rapid air circulation inside the substation body 100.

[0066] In this embodiment, the prefabricated substation is used as follows: When the prefabricated substation is moved, the wheels 104 are swung to the support position via the wheel frame 103, and the wheel frame 103 is locked by the wheel frame locking structure. After the prefabricated substation is moved to the designated position, the wheel frame 103 is unlocked by the wheel frame unlocking structure, and the wheels 104 are swung to the off-position via the wheel frame 103, and the wheel frame 103 is locked by the wheel frame locking structure. Then, the telescopic cylinders 105 on the two wheels 104 on the same side of the base 101 are connected by the telescopic cylinder connecting structure. The two telescopic cylinders 105 on the same side of the base 101 and the two wheels 104 together form rollers 107 on the corresponding side. The rollers 107 cannot provide adhesion to animals during climbing, thereby preventing animals from climbing into the substation body 100. In addition, the projections of each roller 107 in the vertical direction together form a closed shape, which can provide comprehensive protection in the circumference of the prefabricated substation and avoid blind spots.

[0067] In other embodiments of the prefabricated substation, the protective device does not include heat transfer plates and expansion airbags. The protective device only includes a protective frame, ceramic side baffles, and a ceramic top baffle.

[0068] In other embodiments of the prefabricated substation, no protective devices are arranged inside the substation body, but a support base is arranged inside the substation body, and high and low voltage circuit breaker supports are placed on the support base.

[0069] In other embodiments of the prefabricated substation, the locking tongue is not provided with a limit rod and an elastic drive member, and the walls of the first locking hole and the second locking hole are not provided with limit grooves. The locking tongue locks the wheel frame only by extending into the corresponding locking hole.

[0070] In other embodiments of the prefabricated substation, the wheel frame locking structure does not employ a locking tongue and elastic plate, and the wheel frame unlocking structure does not employ a pull structure. The wheel frame locking structure includes a locking bolt and locking bolt mounting holes. The tail end of the locking bolt has a screwing component extending beyond the wheel frame. The base has a first locking hole and a second locking hole that threadedly engage with the locking bolt. When the wheel swings to the support position, the screwing component screws the locking bolt into the first locking hole to lock the wheel frame. When the wheel swings to the off-position, the screwing component screws the locking bolt into the second locking hole to lock the wheel frame. When the wheel frame needs to be unlocked, the screwing component unscrews the locking bolt from the corresponding locking hole; in this case, the screwing component functions as the wheel frame unlocking structure.

[0071] In other embodiments of the prefabricated substation, the wheel frame does not include support rods, and the wheel frame is specifically a frame structure.

[0072] In other embodiments of the prefabricated substation, the telescopic cylinder connection structure does not include a locking rod and locking holes. The telescopic cylinder connection structure includes a locking head and a snap-fit ​​for engaging with the locking head. The two telescopic cylinders are connected and fixed by the engagement of the locking head and the snap-fit.

[0073] In other embodiments of the prefabricated substation, three casters are arranged on each side of the base, and adjacent casters on the same side of the base are connected by a telescopic tube. Alternatively, four casters are arranged on each side of the base, and adjacent casters on the same side of the base are connected by a telescopic tube.

[0074] In other embodiments of the prefabricated substation, among the wheels arranged on the same side of the base, only one of the two adjacent wheels is provided with a telescopic cylinder, and the other is provided with a connection structure connected to the telescopic cylinder.

[0075] In other embodiments of the prefabricated substation, the side of the wheel body is provided with a mounting structure for mounting a telescopic cylinder, which can be detachably mounted on the wheel body through the mounting structure.

[0076] In other embodiments of the prefabricated substation, the rolling element is not a telescopic cylinder, but a cylindrical tube of equal diameter.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A prefabricated substation, comprising a substation body, the substation body including a base, and two casters respectively arranged on each side of the base, each caster including a wheel frame and a wheel body, characterized in that, The wheel frame is hinged to the lower part of the base to drive the wheels to swing up and down. The base has a clearance structure to avoid the wheels when they swing. The wheels have a support position for contact with the ground and an off-center position on the upper side of the base during their swing stroke. The wheel frame has a locking structure for locking the wheel frame when the wheels are in the support or off-center position and a wheel frame unlocking structure for unlocking the wheel frame when the wheels switch between the support and off-center positions. Each swivel wheel has a telescopic tube embedded on its side, which cooperates with the wheels to form a roller when the wheels are in the off-center position. A telescopic tube connecting structure is provided at the opposite ends of the two telescopic tubes on the same side of the base to connect the two telescopic tubes. The two telescopic cylinders and two wheels on the same side of the base together form the rollers on the corresponding sides. The telescopic cylinders and wheels are respectively arranged on each side of the base so that the projections of the rollers on each side of the base in the vertical direction form a closed shape. The telescopic cylinder connection structure includes a snap-fit ​​rod hinged to the opposite end of one of the two telescopic cylinders on the same side and a snap-fit ​​hole arranged on the opposite end of the other. The extension direction of the snap-fit ​​hole is consistent with the extension direction of the telescopic cylinder. A fixed sleeve and a sliding sleeve are sleeved on the outer circumference. The fixed sleeve and the sliding sleeve are connected by an elastic element. The fixed sleeve has a snap-fit ​​groove at the end facing the sliding sleeve. The snap-fit ​​rod has a snap-fit ​​section. The wall of the snap-fit ​​hole has a snap-fit ​​through hole communicating with the snap-fit ​​groove. The snap-fit ​​section extends into the snap-fit ​​groove through the snap-fit ​​through hole. The sliding sleeve is used to press the snap-fit ​​section into the snap-fit ​​groove.

2. The prepackaged electrical substation of claim 1, wherein, The wheel frame includes a support rod, one end of which is hinged to the base, and the other end is used to rotatably mount the wheel.

3. The prepackaged electrical transformer station of claim 1, wherein, The wheel frame has a mounting cavity containing an elastic plate. A mounting hole is located on the side of the mounting cavity facing the base, and a locking tongue is installed in the mounting hole. The locking tongue is connected and fixed to the elastic plate. The base has a first locking hole and a second locking hole for the locking tongue to extend into. When the wheel swings to the support position, the locking tongue, driven by the elastic plate, extends into the first locking hole to lock the wheel frame. When the wheel swings to the off-position, the locking tongue, driven by the elastic plate, extends into the second locking hole to lock the wheel frame. A pulling structure is connected to the elastic plate. The pulling structure is used to pull the elastic plate to deform during unlocking, causing the locking tongue to exit from the corresponding locking hole. The locking tongue and the elastic plate form the wheel frame locking structure, and the pulling structure forms the wheel frame unlocking structure.

4. The prefabricated substation according to claim 3, characterized in that, The first and second locking holes are provided with limiting grooves on their hole walls. A limiting rod is hinged to the lock tongue. An elastic driving member is arranged between the limiting rod and the lock tongue to drive the limiting rod to swing away from the lock tongue. The swing end of the limiting rod is provided with a limiting structure to cooperate with the limiting groove.

5. The prefabricated substation according to claim 1, characterized in that, The substation body is equipped with protective devices, including a protective frame. The protective frame has a support plate for supporting and placing high and low voltage circuit breakers. Ceramic side baffles and ceramic top baffles are arranged on the support plate. The ceramic side baffles are arranged on opposite sides of the high and low voltage circuit breakers, and the ceramic top baffles are arranged on the upper side of the high and low voltage circuit breakers. The support plate, ceramic side baffles and ceramic top baffles together form a protective cavity for installing high and low voltage circuit breakers.

6. The prefabricated substation according to claim 5, characterized in that, The protective device also includes a heat transfer plate and an inflatable airbag containing an insulating extinguishing agent. The inflatable airbag is arranged on the side of the ceramic side baffle facing away from the high and low pressure air switches. The heat transfer plate is attached to the side of the inflatable airbag facing away from the ceramic side baffle. The support plate, ceramic side baffle, and ceramic upper baffle are in heat transfer contact with the heat transfer plate. The ceramic side baffle is provided with extinguishing holes. The inflatable airbag and the protective cavity are connected through the extinguishing holes so that the insulating extinguishing agent can enter the protective cavity after the inflatable airbag bursts due to heat.

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