Prefabricated transformer substation

Abstract

The utility model relates to the technical field of transformer substations, and provides a prefabricated transformer substation which comprises a base, a prefabricated transformer substation body, an outer cover, a moisture-proof ventilation assembly and a connection installation assembly. A base is arranged below the prefabricated substation body, and the bottom of the prefabricated substation body and the base are connected and fixed through a connecting and mounting assembly; an outer cover is rotationally mounted on the outer surface of the prefabricated substation body; a moisture-proof ventilation assembly is arranged outside the prefabricated substation body; wherein the moisture-proof ventilation assembly comprises an air inlet fan, an air inlet, a rectangular plate, a long groove, air inlet meshes and a filter screen; by means of the technical scheme, the problems that in the prior art, most existing prefabricated transformer substations are directly installed on the ground, the interiors of the prefabricated transformer substations are prone to being affected with damp in a humid and rainy environment, some equipment of the transformer substations are prone to being rusted and damaged, normal work of the transformer substations is affected, and the transformer substations are damaged are solved. And the operation stability of the prefabricated substation is easily influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to substation technical field, concretely relates to a prepackaged substation. BACKGROUND

[0002] The box type substation is divided into prepackaged and non-prepackaged (on-site installation) type substations, wherein the prepackaged substation is premanufactured and assembled in a factory, including a transformer, high-voltage switch equipment and control equipment, low-voltage switch equipment and control equipment, internal wiring, metering, compensation, arrester and other auxiliary equipment, configured in a common shell or a group of shells, and passed type test according to the corresponding standard, which is a complete substation.

[0003] The existing prepackaged substations are mostly directly installed on the ground, and the interior of the prepackaged substation is prone to damp in a humid and rainy environment, which in turn easily causes some equipment of the substation to rust and be damaged, affects the normal work of the substation, and easily affects the stability of the operation of the prepackaged substation.

[0004] Therefore, the above problems are improved. UTILITY MODEL CONTENTS

[0005] In view of the defects of the prior art, the utility model provides a prepackaged substation, which can effectively solve the above problems.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] The utility model provides a prepackaged substation, which comprises a base (1), a prepackaged substation body (2), an outer cover (3), a moisture-proof ventilation assembly (4) and a connecting and mounting assembly (5).

[0008] The base (1) is arranged below the prepackaged substation body (2), and the bottom of the prepackaged substation body (2) and the base (1) are connected and fixed through the connecting and mounting assembly (5).

[0009] The outer cover (3) is rotatably arranged on the outer surface of the prepackaged substation body (2), and the moisture-proof ventilation assembly (4) is arranged outside the prepackaged substation body (2).

[0010] The moisture-proof ventilation assembly (4) comprises an air inlet fan (4-3), an air inlet (4-5), a rectangular plate (4-6), a long groove (4-7), an air inlet mesh (4-8) and a filter screen (4-10).

[0011] The bottom surface of the outer cover (3) is provided with a plurality of air inlets (4-5); the interior of the outer cover (3) is provided with a rectangular plate (4-6), the rectangular plate (4-6) is located above the air inlets (4-5), the surface of the rectangular plate (4-6) is provided with a long groove (4-7), the bottom of the long groove (4-7) is provided with an air inlet mesh (4-8), the upper part of the air inlet mesh (4-8) is used to place dry material; the upper part of the dry material is provided with a filter screen (4-10); the top of the outer cover (3) and the side of the prefabricated substation body (2) are provided with a plurality of air intake fans (4-3), the air intake end of the air intake fan (4-3) is connected to the interior of the outer cover (3); the exhaust end of the air intake fan (4-3) is connected to the inner cavity of the prefabricated substation body (2).

[0012] Preferably, a support layer (4-9) is provided on the inner surface of the long groove (4-7), and the bottom of the filter screen (4-10) is attached to the surface of the support layer (4-9).

[0013] Preferably, the rectangular plate (4-6) is fixed to the outer surface of the prefabricated substation body (2); the outer cover (3) is sealed and fitted to both the outer surface of the prefabricated substation body (2) and the outer surface of the rectangular plate (4-6).

[0014] Preferably, the moisture-proof and ventilated component (4) further includes a partition plate (4-1), an air inlet (4-2), and an exhaust outlet (4-4);

[0015] The partition plate (4-1) is located at the top inside the prefabricated substation body (2). The surface of the partition plate (4-1) is provided with a plurality of air inlets (4-2), and the air inlets (4-2) are close to the air intake fan (4-3).

[0016] The prefabricated substation body (2) has exhaust holes (4-4) on both sides of its surface, and the exhaust holes (4-4) are located away from the intake fan (4-3).

[0017] Preferably, the moisture-proof and ventilated component (4) further includes a fastening mechanism; the fastening mechanism includes a fixing sleeve (4-11), a connecting plate (4-12), a limiting frame (4-13), and a support spring (4-14);

[0018] The fixing sleeve plate (4-11) is fixedly installed on the outer surface of the prefabricated substation body (2); the connecting plate (4-12) is fixedly installed on the outer surface of the outer cover (3), and when the outer cover (3) is closed, the connecting plate (4-12) and the fixing sleeve plate (4-11) are coaxially arranged, and the connecting plate (4-12) is located below the fixing sleeve plate (4-11); the connecting plate (4-12) has a through hole;

[0019] The limiting frame (4-13) includes a pin (4-13-1), a first limiting ring (4-13-2), a second limiting ring (4-13-3), and a handle (4-13-4); the first limiting ring (4-13-2) is fixedly installed at the end of the pin (4-13-1); the handle (4-13-4) is fixedly installed at the beginning of the pin (4-13-1); the second limiting ring (4-13-3) is fixedly installed at the position between the end and the beginning of the pin (4-13-1), and the distance between the first limiting ring (4-13-2) and the second limiting ring (4-13-3) is equal to the distance between the lower surface of the fixing sleeve (4-11) and the lower surface of the connecting plate (4-12);

[0020] The pin (4-13-1) passes through the through hole of the connecting plate (4-12), and the pin (4-13-1) is retractable relative to the through hole; the first limiting ring (4-13-2) at the end of the pin (4-13-1) is located below the fixing sleeve (4-11), and the second limiting ring (4-13-3) is located below the connecting plate (4-12); the support spring (4-14) is sleeved on the outer periphery of the pin (4-13-1) and between the first limiting ring (4-13-2) and the connecting plate (4-12);

[0021] When the outer cover (3) is closed, under the elastic force of the support spring (4-14), the pin (4-13-1) moves upward to the limit position. At this time, the first limiting ring (4-13-2) is fastened against the inner surface of the fixing sleeve (4-11), thereby fixing the outer cover (3) relative to the prefabricated substation body (2). Pulling the pin (4-13-1) downward causes the first limiting ring (4-13-2) to leave the inner surface of the fixing sleeve (4-11), and the outer cover (3) can be opened freely.

[0022] Preferably, the connection and installation assembly (5) includes an inner groove (5-1), which is formed on the surface of the base (1). The bottom of the prefabricated substation body (2) is inserted into the inner groove (5-1). The outer surface of the prefabricated substation body (2) is provided with an outer ring layer (5-2), and the bottom surface of the outer ring layer (5-2) is attached to the top of the base (1).

[0023] Preferably, a countersunk groove (5-3) is provided at the bottom of the prefabricated substation body (2), and a plurality of threaded holes (5-4) are provided in the inner groove (5-1). A fixing bolt (5-5) is inserted and connected in the countersunk groove (5-3), and the lower end of the fixing bolt (5-5) is screwed into the threaded hole (5-4).

[0024] Preferably, the bottom of the inner groove (5-1) is provided with a plurality of rectangular openings (5-6), and the bottom of the prefabricated substation body (2) is provided with a plurality of moving wheels (5-7), which are located inside the rectangular openings (5-6).

[0025] Preferably, the side surface of the base (1) is an inclined surface structure, and the bottom of the base (1) is a concave structure.

[0026] The prefabricated substation provided by this utility model has the following advantages:

[0027] 1. This utility model is equipped with a moisture-proof and ventilation component. Through the interaction of structures such as partition plate, air inlet, air intake fan, filter screen, rectangular plate and long groove, the air intake fan blows external air downwards from the top of the prefabricated substation body, which can exhaust the internal temperature to the sides and filter out dust. Materials for drying the gas can be placed in the long groove to achieve an effective heat dissipation and drying effect.

[0028] 2. This utility model is equipped with a connection and installation component. Through the interaction of the inner groove, fixing bolts and moving wheels, the prefabricated substation body can be supported on the ground by the moving wheels, and is stably connected to the prefabricated substation body through the inner groove. The separation between the inner groove and the ground can achieve the effect of moisture return. Attached Figure Description

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is an isometric drawing of the present invention;

[0032] Figure 3This is an isometric sectional view of the present invention;

[0033] Figure 4 Appendix to this utility model Figure 2 Enlarged view of part A in the middle;

[0034] Figure 5 Appendix to this utility model Figure 3 Enlarged view of part B in the middle section;

[0035] In the diagram: 1. Base; 2. Prefabricated substation body; 3. Outer cover; 4. Moisture-proof and ventilation components; 4-1. Partition plate; 4-2. Air inlet; 4-3. Air intake fan; 4-4. Exhaust port; 4-5. Air inlet; 4-6. Rectangular plate; 4-7. Long groove; 4-8. Air inlet mesh; 4-9. Support layer; 4-10. Filter screen; 4-11. Fixing sleeve; 4-12. Connecting plate; 4-13. Limiting bracket; 4-13-1. Pin; 4-13-2. First limiting ring; 4-13-3. Second limiting ring; 4-13-4. Handle; 4-14. Support spring; 5. Connection and installation components; 5-1. Inner groove; 5-2. Outer ring layer; 5-3. Countersunk groove; 5-4. Threaded hole; 5-5. Fixing bolt; 5-6. Rectangular opening; 5-7. Moving wheel. Detailed Implementation

[0036] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0037] like Figures 1-5 As shown, this embodiment proposes a prefabricated substation, including a base 1, a prefabricated substation body 2, an outer cover 3, a moisture-proof and ventilation component 4, and a connection and installation component 5;

[0038] A base 1 is provided on the bottom of the prefabricated substation body 2, and the bottom of the prefabricated substation body 2 and the base 1 are connected and fixed by a connecting installation component 5.

[0039] An outer cover 3 is rotatably mounted on the outer surface of the prefabricated substation body 2; for example, the outer cover 3 is rotatably connected to the outer surface of the prefabricated substation body 2 via a pin; a moisture-proof and ventilation component 4 is provided on the outside of the prefabricated substation body 2.

[0040] Among them: the moisture-proof and ventilation component 4 includes an intake fan 4-3, an air inlet 4-5, a rectangular plate 4-6, a long slot 4-7, an air inlet mesh 4-8, and a filter screen 4-10;

[0041] The bottom surface of the outer cover 3 has several air inlets 4-5; inside the outer cover 3, there is a rectangular plate 4-6, which is located above the air inlets 4-5. The surface of the rectangular plate 4-6 has a long groove 4-7, and the bottom of the long groove 4-7 has an air inlet mesh 4-8. The upper part of the air inlet mesh 4-8 is used to place the drying material; a filter screen 4-10 is placed above the drying material; specifically, a support layer 4-9 is provided on the inner surface of the long groove 4-7, and the bottom of the filter screen 4-10 is attached to the surface of the support layer 4-9 to realize the installation of the filter screen 4-10; there is a large gap between the filter screen 4-10 and the inner bottom surface of the long groove 4-7. The drying material is placed at the bottom of the long groove 4-7. Through the large gap height, a sufficient amount of drying material can be added inside to dry the incoming air.

[0042] In practical applications, rectangular plates 4-6 are fixed to the outer surface of the prefabricated substation body 2; the outer cover 3 is sealed and fitted to both the outer surface of the prefabricated substation body 2 and the outer surface of rectangular plates 4-6. In this embodiment, the sealing and fitting effect prevents dust from entering through gaps after the outer cover 3 is closed.

[0043] Several air intake fans 4-3 are installed on the top of the outer cover 3 and on the side of the prefabricated substation body 2. The air intake end of the air intake fan 4-3 is connected to the interior of the outer cover 3; the exhaust end of the air intake fan 4-3 is connected to the inner cavity of the prefabricated substation body 2.

[0044] Furthermore, the moisture-proof and ventilation component 4 also includes a partition plate 4-1, an air inlet 4-2, and an exhaust 4-4;

[0045] The partition plate 4-1 is installed at the top inside the prefabricated substation body 2. Several air inlets 4-2 are opened on the surface of the partition plate 4-1, and the air inlets 4-2 are close to the air intake fan 4-3.

[0046] Exhaust holes 4-4 are opened on both sides of the prefabricated substation body 2, and the exhaust holes 4-4 are set away from the intake fan 4-3.

[0047] In this embodiment, to achieve the effect of heat dissipation and drying treatment of the prefabricated substation body 2, a moisture-proof and ventilation component 4 is designed. A partition plate 4-1 is installed at the top inside the prefabricated substation body 2. Air inlets 4-2 are opened on the surface of the partition plate 4-1 to allow air to enter the prefabricated substation body 2. Multiple air intake fans 4-3 are installed on the outer surface of the prefabricated substation body 2 to blow air into it. An air inlet 4-5 is opened at the bottom of the outer cover 3 for air intake. A rectangular plate 4-6 is installed on the outer surface of the prefabricated substation body 2, located within the outer cover 3. Long grooves 4-7 are opened on the surface of the rectangular plate 4-6. -7 has an air inlet mesh 4-8 at the bottom, into which drying materials such as packing material can be placed to dry the gas entering through the air inlet 4-5. A support layer 4-9 is set inside the long groove 4-7, and a filter screen 4-10 is placed on the support layer 4-9 to prevent dust from entering. Therefore, under the action of the air intake fan 4-3, the external gas enters through the air inlet 4-5, is dried by the drying material, and is filtered by the filter screen 4-10 before being blown into the interior of the prefabricated substation body 2. After flowing through the internal cavity of the prefabricated substation body 2, the gas is exhausted from the exhaust port 4-4, thereby achieving the drying and ventilation effect of the prefabricated substation body 2 and improving the stability of the prefabricated substation operation.

[0048] As a specific implementation method, the moisture-proof and ventilation component 4 also includes a fastening mechanism; the fastening mechanism includes a fixing sleeve 4-11, a connecting plate 4-12, a limiting bracket 4-13, and a support spring 4-14;

[0049] A fixing sleeve plate 4-11 is fixedly installed on the outer surface of the prefabricated substation body 2; a connecting plate 4-12 is fixedly installed on the outer surface of the outer cover 3, and when the outer cover 3 is closed, the connecting plate 4-12 and the fixing sleeve plate 4-11 are coaxially arranged, with the connecting plate 4-12 located below the fixing sleeve plate 4-11; the connecting plate 4-12 has a through hole.

[0050] The limiting frame 4-13 includes a pin 4-13-1, a first limiting ring 4-13-2, a second limiting ring 4-13-3, and a handle 4-13-4; the first limiting ring 4-13-2 is fixedly installed at the end of the pin 4-13-1; the handle 4-13-4 is fixedly installed at the beginning of the pin 4-13-1; the second limiting ring 4-13-3 is fixedly installed at the position between the end and the beginning of the pin 4-13-1, and the distance between the first limiting ring 4-13-2 and the second limiting ring 4-13-3 is equal to the distance between the lower surface of the fixed sleeve plate 4-11 and the lower surface of the connecting plate 4-12;

[0051] Pin 4-13-1 passes through the through hole of connecting plate 4-12, and pin 4-13-1 can be pulled and pulled relative to the through hole; the first limiting ring 4-13-2 at the end of pin 4-13-1 is located below the fixed sleeve plate 4-11, and the second limiting ring 4-13-3 is located below the connecting plate 4-12; a support spring 4-14 is sleeved on the outer periphery of pin 4-13-1, between the first limiting ring 4-13-2 and the connecting plate 4-12;

[0052] When the outer cover 3 is closed, the pin 4-13-1 moves upward to its limit position under the elastic force of the support spring 4-14. At this time, the first limiting ring 4-13-2 is fastened against the inner surface of the fixing sleeve 4-11, thus fixing the outer cover 3 relative to the prefabricated substation body 2. Pulling the pin 4-13-1 downward causes the first limiting ring 4-13-2 to leave the inner surface of the fixing sleeve 4-11, and the outer cover 3 can be opened freely.

[0053] This structure facilitates the opening of the outer cover 3; and, in use, ensures that the outer cover 3 is closed to protect the internal filters 4-10 and the dried materials.

[0054] As a specific implementation, the connection and installation component 5 includes an inner groove 5-1, which is formed on the surface of the base 1. The bottom of the prefabricated substation body 2 is inserted and connected in the inner groove 5-1. An outer ring layer 5-2 is provided on the outer surface of the prefabricated substation body 2, and the bottom surface of the outer ring layer 5-2 is attached to the top of the base 1.

[0055] The prefabricated substation body 2 has a countersunk groove 5-3 at the bottom, and several threaded holes 5-4 are opened in the inner groove 5-1. A fixing bolt 5-5 is inserted into the countersunk groove 5-3, and the lower end of the fixing bolt 5-5 is screwed into the threaded hole 5-4.

[0056] The bottom of the inner groove 5-1 has several rectangular openings 5-6, and the bottom of the prefabricated substation body 2 has several moving wheels 5-7, which are located inside the rectangular openings 5-6.

[0057] In this embodiment, in order to achieve the fixed effect of the prefabricated substation body 2 being separated from the ground, a connecting installation component 5 is designed. An inner groove 5-1 is provided on the base 1, and the prefabricated substation body 2 is inserted into the inner groove 5-1. Multiple countersunk grooves 5-3 are provided on the bottom of the prefabricated substation body 2. Threaded holes 5-4 are provided in the inner groove 5-1 at positions opposite to the countersunk grooves 5-3. Fixing bolts 5-5 are inserted into the countersunk grooves 5-3 and screwed into the threaded holes 5-4, which can fix the prefabricated substation body 2 to the base 1. Multiple rectangular openings 5-6 are provided on the bottom of the base 1. The bottom of the prefabricated substation body 2 is provided with moving wheels 5-7, which can support the prefabricated substation body 2 to move on the ground. When the prefabricated substation body 2 is installed, the moving wheels 5-7 are located in the rectangular openings 5-6.

[0058] Furthermore, the side surface of the base 1 is sloping, and the bottom of the base 1 is concave. In this embodiment, the sloping surface structure prevents rainwater accumulation, and the concave structure reduces the risk of moisture rising and causing dampness.

[0059] When needed, install and fix the base 1, push the prefabricated substation body 2 to move on the ground via the moving wheels 5-7, lift the prefabricated substation body 2 and put it into the inner groove 5-1, enter the interior and screw the fixing bolt 5-5 through the countersunk groove 5-3 and into the threaded hole 5-4, pull the limit bracket 4-13 to open the outer cover 3, put the dried material into the long groove 4-7 and put in the filter screen 4-10, start the air intake fan 4-3 when running, the outside air enters the outer cover 3 through the air intake 4-5, the air enters the interior of the prefabricated substation body 2 through the air intake hole 4-2 after the material is dried and the dust is filtered, and the internal temperature is blown out through the exhaust hole 4-4.

[0060] The working principle and beneficial effects of this utility model are as follows:

[0061] 1. This utility model is equipped with a moisture-proof and ventilation component. Through the interaction of structures such as partition plate, air inlet, air intake fan, filter screen, rectangular plate and long groove, the air intake fan blows external air downwards from the top of the prefabricated substation body, which can exhaust the internal temperature to the sides and filter out dust. Materials for drying the gas can be placed in the long groove to achieve an effective heat dissipation and drying effect.

[0062] 2. This utility model is equipped with a connection and installation component. Through the interaction of the inner groove, fixing bolts and moving wheels, the prefabricated substation body can be supported on the ground by the moving wheels, and is stably connected to the prefabricated substation body through the inner groove. The separation between the inner groove and the ground can achieve the effect of moisture return.

[0063] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A prepackaged electrical substation, characterized in that, The utility model relates to a prepackaged transformer substation, which comprises a base (1), a prepackaged transformer substation body (2), an outer cover (3), a moisture-proof ventilation assembly (4) and a connecting and mounting assembly (5). The prepackaged transformer substation body (2) is arranged on the base (1), and the bottom of the prepackaged transformer substation body (2) is connected and fixed with the base (1) through the connecting and mounting assembly (5). The outer cover (3) is rotatably arranged on the outer surface of the prepackaged transformer substation body (2), and the moisture-proof ventilation assembly (4) is arranged on the outer surface of the prepackaged transformer substation body (2). The moisture-proof ventilation assembly (4) comprises an air inlet fan (4-3), an air inlet (4-5), a rectangular plate (4-6), a long groove (4-7), an air inlet mesh (4-8) and a filter screen (4-10). The bottom surface of the outer cover (3) is provided with a plurality of air inlets (4-5); the inner portion of the outer cover (3) is provided with the rectangular plate (4-6), which is arranged above the air inlets (4-5); the surface of the rectangular plate (4-6) is provided with the long groove (4-7); the bottom of the long groove (4-7) is provided with the air inlet mesh (4-8), and the upper surface of the air inlet mesh (4-8) is used for placing dry materials; the upper portion of the dry materials is provided with the filter screen (4-10); the top portion of the outer cover (3) and the side portion of the prepackaged transformer substation body (2) are provided with a plurality of air inlet fans (4-3), and the air inlet ends of the air inlet fans (4-3) are communicated with the inner portion of the outer cover (3); the air outlet ends of the air inlet fans (4-3) are communicated with the inner cavity of the prepackaged transformer substation body (2). The inner surface of the long groove (4-7) is provided with a support layer (4-9), and the bottom of the filter screen (4-10) is attached to the surface of the support layer (4-9).

2. A prepackaged electrical substation according to claim 1, characterized in that, The rectangular plate (4-6) is fixed with the outer surface of the prepackaged transformer substation body (2); and the outer surface of the outer cover (3) and the outer surface of the rectangular plate (4-6) are sealingly attached.

3. A prepackaged electrical substation according to claim 1, wherein, The moisture-proof ventilation assembly (4) further comprises a partition plate (4-1), an air inlet hole (4-2) and an air outlet hole (4-4).

4. A prepackaged electrical substation according to claim 1, wherein, The partition plate (4-1) is arranged on the inner top portion of the prepackaged transformer substation body (2), and the surface of the partition plate (4-1) is provided with a plurality of air inlet holes (4-2), which are close to the air inlet fans (4-3); The air outlet holes (4-4) are arranged on the both side surfaces of the prepackaged transformer substation body (2), and are away from the air inlet fans (4-3). The moisture-proof ventilation assembly (4) further comprises a fastening mechanism, which comprises a fixed sleeve plate (4-11), a connecting plate (4-12), a limiting frame (4-13) and a support spring (4-14).

5. A prepackaged electrical substation according to claim 1, wherein, ​ The outer surface of the prefilled transformer substation body (2) is fixedly installed with the fixed sleeve plate (4-11); the outer surface of the outer cover (3) is fixedly installed with the connecting plate (4-12), and when the outer cover (3) is closed, the connecting plate (4-12) and the fixed sleeve plate (4-11) are coaxially arranged, and the connecting plate (4-12) is located below the fixed sleeve plate (4-11); the connecting plate (4-12) is provided with a through hole; The limiting frame (4-13) comprises a pin shaft (4-13-1), a first limiting ring (4-13-2), a second limiting ring (4-13-3) and a handle (4-13-4); the tail end of the pin shaft (4-13-1) is fixedly installed with the first limiting ring (4-13-2); the head end of the pin shaft (4-13-1) is fixedly installed with the handle (4-13-4); the position between the tail end and the head end of the pin shaft (4-13-1) is fixedly installed with the second limiting ring (4-13-3), and the distance between the first limiting ring (4-13-2) and the second limiting ring (4-13-3) is equal to the distance between the lower surface of the fixed sleeve plate (4-11) and the lower surface of the connecting plate (4-12); The pin shaft (4-13-1) passes through the through hole of the connecting plate (4-12), and the pin shaft (4-13-1) is pullably movable relative to the through hole; the first limiting ring (4-13-2) at the tail end of the pin shaft (4-13-1) is located below the fixed sleeve plate (4-11), and the second limiting ring (4-13-3) is located below the connecting plate (4-12); the supporting spring (4-14) is sleeved between the first limiting ring (4-13-2) and the connecting plate (4-12) on the outer periphery of the pin shaft (4-13-1); When the outer cover (3) is closed, the pin shaft (4-13-1) is moved upward to the limit position under the elastic force of the supporting spring (4-13-4), at which time the first limiting ring (4-13-2) is tightly fastened against the inner surface of the fixed sleeve plate (4-11), so that the outer cover (3) is fixed relative to the prefilled transformer substation body (2); the pin shaft (4-13-1) is pulled downward, so that the first limiting ring (4-13-2) is away from the inner surface of the fixed sleeve plate (4-11), and the outer cover (3) can be freely opened.

6. A prepackaged electrical substation according to claim 1, wherein, The connecting and mounting assembly (5) comprises an inner groove (5-1) which is provided on the surface of the base (1), the prefilled transformer substation body (2) is inserted and connected in the inner groove (5-1), and the outer surface of the prefilled transformer substation body (2) is provided with an outer ring layer (5-2) which is attached to the top of the base (1).

7. A prepackaged electrical substation according to claim 6, characterized in that The prepackaged transformer substation body (2) is provided with a countersunk groove (5-3) in the bottom, a plurality of threaded holes (5-4) are arranged in the inner groove (5-1), a fixing bolt (5-5) is arranged in the countersunk groove (5-3), and the lower end of the fixing bolt (5-5) is screwed into the threaded hole (5-4).

8. A prepackaged electrical substation according to claim 7, characterized in that A plurality of rectangular openings (5-6) are arranged in the bottom of the inner groove (5-1), and a plurality of moving wheels (5-7) are arranged at the bottom of the prepackaged transformer substation body (2), and the moving wheels (5-7) are located in the rectangular openings (5-6).

9. A prepackaged electrical substation according to claim 1, wherein, The side surface of the base (1) is an inclined surface structure, and the bottom of the base (1) is a concave structure.

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