A small prefabricated transformer substation with reinforcement structure

Abstract

The utility model relates to substation technical field provides a small prefabricated substation with reinforcing structure, including bottom plate, embeds the hardened ground, be provided with air cavity in the bottom plate, is set up with a plurality of storage holes on the outside wall of bottom plate, is slidably installed with fastening unit in the storage hole, the upside of bottom plate is provided with a plurality of gas outlets, is provided with pressure limiting valve for maintaining the pressure intensity in air cavity in the gas outlet, the outer box body is set up on the bottom plate, the outer box body has the inner chamber of bottom opening, the outer wall of box body is provided with air inlet, is provided with filter plate at air inlet, the air injection spare is set up in the inner chamber, and the air in outer box body is drawn into the air cavity, and the fastening unit is under the pressure of air pressure and is in abutment with the hardened ground. The setting of pressure limiting valve makes the high pressure environment in air cavity, and the stable connection of bottom plate and hard ground is realized through high pressure air to push the piston positioning rod, and the wind resistance of prefabricated substation is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of substation technology, and in particular to a small prefabricated substation with a reinforced structure. Background Technology

[0002] A prefabricated substation typically consists of a compact set of power distribution equipment, including power transformers, low-voltage switchgear, power metering equipment, and reactive power compensation devices, all assembled according to a specific main wiring scheme. It is equivalent to a small substation, completing the entire process from high-voltage power reception to transformer step-down to low-voltage power distribution.

[0003] When small prefabricated substations are installed in the field, they are usually installed directly on the ground by placing the outer casing. This method has poor wind resistance, and because there are many insects in the field, small insects such as termites or ants may enter the outer casing through the gaps, damaging the internal wiring and reducing the service life of the substation. Utility Model Content

[0004] To address the problem of poor wind resistance in existing prefabricated substations, this utility model provides a small prefabricated substation with a reinforced structure, comprising:

[0005] A base plate is embedded in a hardened ground. An air chamber is provided in the base plate. Several storage holes communicating with the air chamber are opened on the outer side wall of the base plate. Fastening units are slidably installed in the storage holes. Multiple air outlets are provided on the upper side of the base plate. Pressure limiting valves for maintaining the pressure intensity in the air chamber are provided in the air outlets.

[0006] An outer casing is mounted on a base plate. The outer casing has an inner cavity with a bottom opening. An air inlet is provided on the outer wall of the casing, and a filter plate is provided at the air inlet.

[0007] An air injection unit, located in the inner cavity, draws air from the outer casing into the air cavity, and the fastening unit comes into contact with the hardened ground under the pressure of the air.

[0008] Specifically, the fastening unit is a piston positioning rod, and the outer end of the piston positioning rod is tapered.

[0009] Specifically, a first spring is wound around the outer periphery of the piston positioning rod, the storage hole includes a storage inner hole with a first aperture and a storage outer hole with a second aperture, the aperture of the storage inner hole is larger than the aperture of the storage outer hole, a first air seal plate is provided at the inner end of the piston positioning rod, and the two ends of the first spring are respectively supported between the first air seal plate and the storage outer hole.

[0010] Specifically, the outer casing includes a casing and multiple uprights. The bottom sidewall of each upright is provided with a positioning groove. The bottom plate is provided with multiple circular grooves corresponding to the positions of the uprights. A locking mechanism that can be inserted into the positioning groove is provided next to each circular groove.

[0011] Specifically, a positioning cavity is provided on one side of the circular groove, which connects the circular groove and the air cavity, and the locking mechanism is disposed in the positioning cavity.

[0012] Specifically, the locking mechanism includes a piston rod and a second spring wrapped around the outer periphery of the piston rod. A second air seal plate is provided at the end of the piston rod away from the column, and the two ends of the second spring are respectively supported between the positioning cavity and the second air seal plate.

[0013] Specifically, the air outlet is located at the edge of the outer casing, and a circumferentially open guide plate is provided on the outer periphery of the bottom end of the outer casing. The guide plate and the bottom plate are combined to form a circumferentially open jet cavity.

[0014] Specifically, the air injection component is an air pump, which is fixedly installed on the base plate. An air injection hole communicating with the air chamber is opened on the top side of the base plate corresponding to the position of the air pump.

[0015] Specifically, a soft ring is fixedly installed inside the air injection hole, and the top side of the soft ring is in contact with the air injection end of the air injection component.

[0016] Specifically, the top of the outer casing is provided with a canopy, and the upper end of the side wall of the outer casing is provided with a through air inlet.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention features an air chamber within the base plate, which is connected to a storage hole, a positioning chamber, and a pressure-limiting valve. An air injection device draws gas from the outer casing and injects it into the air chamber of the base plate. The pressure-limiting valve maintains a high-pressure environment within the air chamber. High-pressure air drives a piston positioning rod, achieving a stable connection between the base plate and the hard ground, thus improving the wind resistance of the prefabricated substation. The high-pressure air-driven piston rod also accelerates the gas exchange rate between the inside and outside of the outer casing. Furthermore, the design of the air injection valve and guide plate effectively prevents small insects from entering the outer casing through the vent gaps, while allowing the gas discharged from the base plate to diffuse more widely, reducing the re-flow of gas discharged from the outer casing. Attached Figure Description

[0019] Figure 1 This is a perspective view of the overall structure of this utility model;

[0020] Figure 2 This is a front view of the internal structure of the outer casing and bottom plate of this utility model;

[0021] Figure 3 This is an enlarged view of the structure at point A in this utility model;

[0022] Figure 4 This is a perspective view of the base plate of this utility model;

[0023] Figure 5 This is a front view of the internal structure of part of the base plate and part of the columns of this utility model.

[0024] Reference numerals in the attached drawings: 1. Outer casing; 101. Casing; 102. Column; 2. Base plate; 3. Air injection component; 31. Air injection hole; 32. Soft ring; 4. Circular groove; 5. Locking mechanism; 51. Positioning groove; 52. Positioning cavity; 53. Piston rod; 54. Second spring; 55. Second air seal plate; 6. Storage hole; 7. Piston positioning rod; 8. Guide plate; 9. Pressure limiting valve; 10. Filter plate; 11. First spring; 12. Limiting ring; 13. First air seal plate. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0029] Combination Figures 1-5 As shown, according to an embodiment of this utility model, a small prefabricated substation with a reinforced structure is provided, including a base plate 2, an outer casing 1, and an air injection unit 3. The base plate 2 is embedded in the hardened ground and has an air chamber. Several storage holes 6 are opened on the outer side wall of the base plate 2, and fastening units are slidably installed in the storage holes 6. Multiple pressure limiting valves 9 for venting are provided on the upper side of the base plate 2. The outer casing 1 is set on the base plate 2 and has an inner cavity with a bottom opening. An air inlet is provided on the outer wall of the casing 101, and a filter plate 10 is covered at the air inlet. The air injection unit 3 is set in the inner cavity and continuously draws gas from the outer casing 1 and injects the gas into the air chamber. Due to the obstruction of the pressure limiting valves 9, a high-pressure chamber of corresponding strength is formed in the base plate 2. The fastening unit abuts against the hardened ground under the pressure of the air pressure, so that a large friction force is generated between the base plate 2 and the inner wall of the cement ground, thereby locking the base plate 2 in the cement ground.

[0030] This improved small prefabricated substation is installed on hard surfaces such as cement or concrete. If it is a dirt surface, a cement surface of the corresponding size needs to be laid in advance. During installation, a corresponding size installation groove is first cut on the hard surface using a cement cutting device. After the installation groove is cut, the base plate 2 is placed into the installation groove. Then, the substation and the outer casing 1 are installed on the base plate 2 by hoisting.

[0031] refer to Figure 3 and Figure 4 The outer wall of the base plate 2 is provided with a number of storage holes 6, which are symmetrically arranged at equal intervals. The inner end of the storage hole 6 is connected to the air cavity. A piston positioning rod 7 is slidably installed in the storage hole 6. The end of the piston positioning rod 7 can be flat, convex or conical. As a preferred embodiment of this utility model, the end of the piston positioning rod 7 is conical. The tip of the piston positioning rod 7 is anchored in the hard ground under the action of air pressure, generating a strong connection strength and significantly enhancing the wind resistance performance of the substation.

[0032] In a further preferred embodiment of this utility model, such as Figure 3 As shown, a first spring 11 is wound around the outer periphery of the piston positioning rod 7. The storage hole 6 includes a storage inner hole with a first aperture and a storage outer hole with a second aperture. The aperture of the storage inner hole is larger than that of the storage outer hole. A first air seal plate 13 is fixedly installed at the inner end of the piston positioning rod 7. The two ends of the first spring 11 are respectively supported between the first air seal plate 13 and the storage outer hole.

[0033] In this embodiment, please refer to Figure 2 and Figure 3 As shown, the first spring 11 continuously applies a thrust to the piston positioning rod 7 away from the storage hole. When the gas injection device 3 is activated, the high-pressure gas in the base plate 2 pushes the first gas seal plate 13 outward, causing the piston positioning rod 7 to slide out of the storage cavity 6. The conical end of the piston positioning rod 7 contacts the inner wall of the mounting groove in the hard ground with a corresponding force, causing the conical end of the piston positioning rod 7 to penetrate and anchor in the hard ground. This generates a large frictional force between the base plate 2 and the inner wall of the cement ground, thereby locking the base plate 2 in the cement ground (and further strengthening the connection between the base plate 2 and the cement ground by subsequently covering the edge of the base plate 2 with cement without obstructing the exhaust port). When the gas injection device 3 is closed, after the pressure in the base plate 2 is restored, the first spring 11 pushes the piston positioning rod 7 into the storage hole 6, automatically releasing the constraint and limiting state between the base plate 2 and the ground.

[0034] The outer enclosure 1 has an inner cavity with an opening at the bottom, and the substation is installed in the inner cavity. The outer enclosure 1 includes a housing 101 and four columns 102. The four columns 102 are fixedly installed at the four corners of the housing 101, and the bottom side wall of the columns 102 is provided with positioning grooves 51. The base plate 2 is provided with multiple circular grooves 4 corresponding to the positions of the columns 102. The bottom of the columns 102 can be inserted into the circular grooves 4. The circular grooves 4 are provided with locking mechanisms 5 that can be inserted into the positioning grooves 51, which are used to lock the columns 102 to the base plate 2. A positioning cavity 52 is provided on one side of the circular groove 4, which connects the circular groove 4 and the air cavity. The locking mechanism 5 is provided in the positioning cavity 52. ​​The locking mechanism 5 includes a piston rod 53 and a second spring 54 wrapped around the outer periphery of the piston rod 53. The piston rod 53 is slidably connected in the positioning cavity 52. ​​The end of the piston rod 53 near the column 102 is hemispherical, and the end away from the column 102 is provided with a second air seal plate 55. The two ends of the second spring 54 are respectively supported between the positioning cavity 52 and the second air seal plate 55.

[0035] When the gas injection device 3 is opened, as the air pressure in the air chamber increases, some of the gas in the base plate 2 flows into the positioning cavity 52 through the connecting hole. This high-pressure gas pushes the second air seal plate 55 outward, pushing the hemispherical end of the piston rod 53 into the positioning groove 51. The piston rod 53 is then pushed into and locked in the positioning cavity 52, locking the bottom of the column 102 into the circular groove 4, thus ensuring a stable connection between the outer casing 1 and the base plate 2. After the gas injection device 3 is closed, the air pressure in the base plate 2 decreases and recovers. The second spring 54 pushes the second air seal plate 55 to pull the piston rod 53 out of the positioning cavity 52, releasing the locking state between the outer casing 1 and the base plate 2.

[0036] Rubber sealing rings are provided on the edges of the first air seal plate 13 and the second air seal plate 55 to improve their sealing performance.

[0037] The air injection component 3 is an air pump, fixedly mounted on the base plate 2. It can be a diaphragm pump or a rotary vane vacuum pump, etc., that can be used for both pumping and injecting air. An air injection hole 31, communicating with the air chamber, is provided on the top side of the base plate 2 at the position corresponding to the air pump. A soft ring 32 is fixedly installed inside the air injection hole 31, and the top side of the soft ring 32 is in contact with the air injection end of the air injection component 3. During the process of the bottom side of the outer casing 1 being attached to the base plate 2, the air injection end of the air pump can be attached to the soft ring 32 to seal the gap between the air injection end of the air pump and the inner wall of the air injection hole 31.

[0038] The gas injection component 3 extracts gas from the outer casing 1, thereby accelerating the gas exchange rate between the inside and outside of the outer casing 1 and promoting air flow inside the outer casing to complete the heat dissipation of the small prefabricated substation. At the same time, the gas extracted by the gas injection component 3 is directly injected into the base plate 2, realizing the fixed connection between the base plate 2 and the hard ground, and between the outer casing 1 and the base plate 2.

[0039] In some embodiments, a vent valve is provided on the base plate 2, which can be used to release the gas inside the base plate 2.

[0040] like Figure 2 As shown, the outer wall of the outer casing 1 is provided with an air inlet, and a filter plate 10 is provided at the air inlet. In a preferred embodiment of this utility model, the top of the outer casing 1 is provided with a rain shelter, and air inlets are symmetrically arranged at the upper end of the side walls of the outer casing 1, with filter plates 10 provided at the air inlets. The air inlets are located below the shelter, which greatly prevents the gas discharged from the outer casing 1 from flowing back into the outer casing 1, thus avoiding interference with heat exchange in the substation. The filter plates 10 can block dust and insects from entering the casing 101, preventing small insects from entering the outer casing 1.

[0041] In a further preferred embodiment of this utility model, reference is made to... Figure 3 and Figure 4 The air outlet is located on the upper side of the bottom plate 2, at the edge of the outer casing 1. A pressure limiting valve 9 is installed at the air outlet. The air inlet end of the pressure limiting valve 9 is fixedly inserted into the air outlet. The pressure limiting valve 9 can be a spring-type or counterweight-type pressure limiting valve, used to maintain the pressure in the air chamber.

[0042] A circumferentially open guide plate 8 is provided on the outer periphery of the bottom end of the outer casing 1. The guide plate 8 and the bottom plate 2 combine to form a circumferentially open jet chamber. When the air pressure in the bottom plate 2 reaches the threshold of the pressure limiting valve 9, the excess high-pressure air in the bottom plate 2 is ejected through the pressure limiting valve 9. Due to the constraint of the guide plate 8, the gas is ejected at high speed through the gap between the guide plate 8 and the bottom plate 2, realizing heat exchange between the inside and outside of the outer casing 1. The high-pressure air is ejected circumferentially, which makes the gas discharged from the bottom plate 2 diffuse more widely, thereby reducing the re-flow of the gas discharged from the outer casing 1 into the outer casing 1. The design of the pressure limiting valve 9 and the jet chamber at the exhaust port can effectively prevent small insects from entering the outer casing 1 through the gap in the exhaust port in the closed state when not venting or in the high-pressure exhaust state, thus avoiding damage to the internal wiring and effectively improving the service life of the substation.

[0043] In a further preferred embodiment of this utility model, a limiting ring 12 is fitted on the outer periphery of the bottom end of the outer casing 1. The bottom side of the limiting ring 12 is fixedly connected to the bottom plate 2. The cross-sectional shape of the limiting ring 12 is triangular, and the top side of the limiting ring 12 is arc-shaped. The guide plate 8 is fixedly connected to the limiting ring 12. The limiting ring 12 can support the guide plate 8 and forms a triangular support structure on the outer periphery of the bottom end of the outer casing 1, further enhancing the wind resistance performance of the small prefabricated substation.

[0044] During the installation of this improved small prefabricated substation, a corresponding installation slot of the required size is first cut on a hard surface using a cement cutting device. After the installation slot is cut, the base plate 2 is placed into the installation slot. Then, the substation and the outer casing 1 are hoisted onto the base plate 2 by means of hoisting, and the installation of the small prefabricated substation is completed.

[0045] In use, the gas injection component 3 draws gas from the outer casing 1, accelerating the gas exchange rate between the inside and outside of the outer casing 1 to complete the heat dissipation treatment of the small prefabricated substation. The gas drawn by the gas injection component 3 is directly injected into the air cavity of the base plate 2, thereby pushing the conical end of the piston positioning rod 7 to abut against the inner wall of the mounting groove with a corresponding force. This creates a large frictional force between the base plate 2 and the inner wall of the cement floor, thus locking the base plate 2 into the cement floor. At the same time, high-pressure air pushes the piston rod 53 into the positioning groove 51 to complete the locking between the outer casing 1 and the base plate 2. Finally, the excess gas in the base plate 2 flows out quickly through the gap between the guide plate 8 and the base plate 2, so that a ring of outwardly flowing airflow is formed on the outer periphery of the bottom of the outer casing 1.

[0046] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0047] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A small prefabricated substation with a reinforced structure, characterized in that, include: The base plate (2) is embedded in the hardened ground. An air cavity is provided in the base plate (2). Several storage holes (6) communicating with the air cavity are opened on the outer side wall of the base plate (2). Fastening units are slidably installed in the storage holes (6). Multiple air outlets are provided on the upper side of the base plate (2). Pressure limiting valves (9) for maintaining the pressure intensity in the air cavity are provided in the air outlets. An outer casing (1) is mounted on a base plate (2). The outer casing (1) has an inner cavity with a bottom opening. An air inlet is provided on the outer wall of the outer casing (1). A filter plate (10) is provided at the air inlet. An air injection unit (3) is installed in the inner cavity to draw air from the outer casing (1) into the air cavity, and the fastening unit abuts against the hardened ground under the pressure of the air pressure.

2. The small prefabricated substation with reinforced structure according to claim 1, characterized in that, The fastening unit is a piston positioning rod (7), and the outer end of the piston positioning rod (7) is tapered.

3. The small prefabricated substation with reinforced structure according to claim 2, characterized in that, The piston positioning rod (7) is wound with a first spring (11) around its outer periphery. The storage hole (6) includes a storage inner hole with a first aperture and a storage outer hole with a second aperture. The aperture of the storage inner hole is larger than that of the storage outer hole. The inner end of the piston positioning rod (7) is provided with a first air seal plate (13). The two ends of the first spring (11) are respectively supported between the first air seal plate (13) and the storage outer hole.

4. The small prefabricated substation with reinforced structure according to claim 1, characterized in that, The outer casing (1) includes a casing (101) and multiple columns (102). The bottom side wall of the column (102) is provided with a positioning groove (51). The bottom plate (2) is provided with multiple circular grooves (4) corresponding to the position of the column (102). A locking mechanism (5) that can be inserted into the positioning groove (51) is provided next to the circular groove (4).

5. The small prefabricated substation with reinforced structure according to claim 4, characterized in that, A positioning cavity (52) is provided on one side of the circular groove (4) to connect the circular groove (4) and the air cavity, and the locking mechanism (5) is provided in the positioning cavity (52).

6. The small prefabricated substation with reinforced structure according to claim 5, characterized in that, The locking mechanism (5) includes a piston rod (53) and a second spring (54) wrapped around the outer periphery of the piston rod (53). A second air seal plate (55) is provided at the end of the piston rod (53) away from the column. The two ends of the second spring (54) are respectively supported between the positioning cavity (52) and the second air seal plate (55).

7. The small prefabricated substation with reinforced structure according to claim 1, characterized in that, The air outlet is located at the edge of the outer casing (1). A circumferentially open guide plate (8) is provided on the outer periphery of the bottom end of the outer casing (1). The guide plate (8) and the bottom plate (2) are combined to form a circumferentially open jet cavity.

8. The small prefabricated substation with reinforced structure according to claim 1, characterized in that, The air injection component (3) is an air pump, which is fixedly installed on the base plate (2). An air injection hole (31) communicating with the air chamber is opened on the top side of the base plate (2) at the position corresponding to the air pump.

9. The small prefabricated substation with reinforced structure according to claim 8, characterized in that, A soft ring (32) is fixedly installed inside the air injection hole (31), and the top side of the soft ring (32) is in contact with the air injection end of the air injection component (3).

10. The small prefabricated substation with reinforced structure according to claim 1, characterized in that, The top of the outer casing (1) is provided with a canopy, and the upper end of the side wall of the outer casing (1) is provided with a through air inlet.

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