A box-type substation

Abstract

The application provides a box-type transformer substation, and relates to the technical field of box-type transformer substations, which comprises a box body, a box door with a lock is rotatably installed on the front end surface of the box body, three limiting insertion grooves are uniformly arranged on the bottom end surface of the box door, the three limiting insertion grooves correspond to three limiting hole positions respectively when the box door is closed, when the insertion limiting of the three limiting insertion columns is released, the operation and maintenance personnel need to move to the right side, the back side and the left side of the box body in sequence, and respectively operate the right side, the middle part and the left side pressing column and the temporary limiting block, the path forces the operation and maintenance personnel to complete a round of patrol around the box body, avoids the extensive operation of directly opening the lock and the box in the traditional operation and maintenance, and solves the problem that the operation and maintenance personnel generally exist the extensive operation of directly opening the box without first comprehensively checking the external state of the box body according to the regulation in the traditional operation and maintenance of the box-type transformer substation, and the physical constraint of the two-man operation system is lacked in the structural design.

Description

Technical Field

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

[0002] The operation and maintenance process of traditional prefabricated substations is significantly crude. Although there are clear regulations requiring a thorough inspection of the enclosure before opening the door, maintenance personnel generally still have the habit of directly unlocking and opening the enclosure during maintenance work. This means that they open the door without fully checking the external condition of the enclosure, resulting in the failure to detect potential external hazards (such as damaged enclosure shell, blocked ventilation holes, accumulation of foreign objects, and aging and exposed cable joints). Such unchecked external problems may trigger a chain of risks during internal maintenance. For example, rainwater seepage due to damaged enclosure may cause equipment short circuits, poor heat dissipation may cause transformer overload damage, and foreign objects touching live parts may induce electric shock accidents, seriously threatening the personal safety of maintenance personnel and the safe operation of equipment.

[0003] Meanwhile, the power industry clearly stipulates that the operation and maintenance of high-voltage equipment must strictly implement the "two-person operation system," which requires two operation and maintenance personnel to work together, one responsible for operation and the other for monitoring and supervision, in order to deal with emergencies and avoid single-person misoperation. However, the structural design of traditional box-type substations lacks physical constraints on this system, and a single person can complete the entire process of opening the box door and operating the equipment, resulting in the system being implemented in a perfunctory manner. In actual operation and maintenance, problems such as accidental switch contact and incorrect operation sequence caused by single-person operation occur frequently, which may not only cause equipment shutdown, but also cause serious power supply accidents such as large-scale power outages, which have a huge impact on production and life. Summary of the Invention

[0004] This invention relates to a prefabricated substation, which solves the problems in the operation and maintenance of traditional prefabricated substations, where maintenance personnel often open the prefabricated substations without first conducting a comprehensive inspection of the external condition of the enclosure, and where the structural design lacks physical constraints on the two-person operation system.

[0005] This invention provides a prefabricated substation, specifically comprising: a prefabricated enclosure, a rainproof cover installed on the top of the enclosure, an installation chamber opened on the front face of the enclosure, and a door with a lock rotatably installed on the front face of the enclosure; the enclosure is installed on the top of a base, the base having a reciprocating cavity inside, and three limiting openings connected to the reciprocating cavity evenly distributed on the front side of the top face of the base; three limiting slots evenly distributed on the bottom face of the door; when the door is closed, the three limiting slots correspond to the positions of the three limiting openings respectively;

[0006] The top surface of the reciprocating moving cavity has three spring storage slots evenly distributed throughout.

[0007] A central plate is provided in the middle area of ​​the reciprocating moving cavity. The top surface of the central plate is fixedly connected to the top surface of the inner end of the spring storage groove in the middle through a central spring connector. A central limiting post is fixedly installed on the front side of the top surface of the central plate. The central limiting post slides and engages with the corresponding opening in the middle.

[0008] A left side plate is provided in the left side area of ​​the reciprocating moving cavity. The top surface of the left side plate is fixedly connected to the top surface of the inner end of the spring storage groove on the left side through the left side spring connector. A left side limiting post is fixedly installed on the front side of the top surface of the left side plate. The left side limiting post is slidably inserted into the corresponding opening on the left side.

[0009] A right side plate is provided in the right side region of the reciprocating moving cavity. The top surface of the right side plate is fixedly connected to the top surface of the inner end of the spring storage groove on the right side through the right side spring connector. A right side limiting post is fixedly installed on the front side of the top surface of the right side plate. The right side limiting post is slidably inserted into the corresponding opening on the right side.

[0010] Furthermore, in its natural state, the top of the central spring connector passes through the top opening of the corresponding limiting hole and is inserted into the limiting slot located in the middle.

[0011] In its natural state, the top of the left limiting post passes through the top opening of the corresponding limiting hole and is inserted into the limiting slot located on the left side.

[0012] In its natural state, the top of the right-side spring connector passes through the top opening of the corresponding limiting hole and is inserted into the limiting slot located on the right side.

[0013] Furthermore, a pressure opening is provided on the left, rear, and right sides of the top surface of the base, which is connected to the reciprocating moving cavity.

[0014] A central pressure post is fixedly installed on the rear side of the top surface of the central plate, and the central pressure post is slidably inserted into the pressure opening located on the rear side.

[0015] A left-side pressure post is fixedly installed on the left side of the top surface of the left side plate, and the left-side pressure post is slidably inserted into the pressure opening located on the left side.

[0016] A right-side pressure post is fixedly installed on the right side of the top surface of the right-side plate, and the right-side pressure post is slidably inserted into the pressure opening located on the right side.

[0017] Furthermore, in its natural state, the top surface of the central spring connector is higher than the top surface of the base;

[0018] When the top surface of the middle pressing column and the top surface of the base are on the same horizontal plane, the middle spring connector is in a stretched state, and the middle limiting insert is separated from the limiting slot.

[0019] In its natural state, the top surface of the left-side spring connector is higher than the top surface of the base;

[0020] When the top surface of the left pressure post is on the same horizontal plane as the top surface of the base, the left spring connector is in a stretched state, and the left limiting post is separated from the limiting slot.

[0021] In its natural state, the top surface of the right-side spring connector is higher than the top surface of the base.

[0022] When the top surface of the right-side pressing column is at the same level as the top surface of the base, the right-side spring connector is in a stretched state, and the right-side limiting insert is separated from the limiting slot.

[0023] Furthermore, a T-shaped shaft is fixedly installed on each of the three pressure-bearing openings adjacent to the top surface of the base;

[0024] Each of the three T-shaped shafts is rotatably mounted with a temporary limiting block in the form of a circular block. The temporary limiting block has a shaft hole at its center, which is rotatably connected to the T-shaped shaft.

[0025] The temporary limiting block has a cross section a on its outer circumference.

[0026] When the top surface of the middle support column is higher than the top surface of the base, the section a of the temporary limiting block located on the rear side contacts the outer peripheral surface of the middle support column;

[0027] When the top surface of the left-side pressure column is higher than the top surface of the base, the section a of the temporary limiting block on the left side contacts the outer peripheral surface of the left-side pressure column.

[0028] When the top surface of the right-side pressure column is higher than the top surface of the base, the cross section a of the temporary limiting block on the right side comes into contact with the outer peripheral surface of the right-side pressure column.

[0029] Furthermore, when the bottom surface of the temporary limiting block located on the rear side contacts the top surface of the middle pressing column, the top surface of the middle pressing column and the top surface of the base are at the same horizontal plane.

[0030] When the bottom surface of the temporary limiting block on the left side contacts the top surface of the left pressure column, the top surface of the left pressure column and the top surface of the base are at the same horizontal plane.

[0031] When the bottom surface of the temporary limiting block on the right side contacts the top surface of the right-side pressing column, the top surface of the right-side pressing column and the top surface of the base are at the same horizontal plane.

[0032] Furthermore, a locking and storage groove with a circular groove structure is provided on the right side of the front end face of the base;

[0033] A locking rotation groove is provided on the right side of the top surface of the base adjacent to the T-shaped shaft. The cross-section of the locking rotation groove is an arc-shaped structure, and the locking rotation groove and the locking storage groove are coaxially arranged.

[0034] The locking storage groove shaft and the locking rotation groove shaft are connected by a connecting hole.

[0035] The bottom end face of the temporary limiting block is provided with a locking groove, which has an arc-shaped groove structure.

[0036] When the cross section a of the temporary limiting block on the right side comes into contact with the outer circumference of the right-side pressing column, the locking groove and the locking groove are positioned correspondingly, and together they form a complete circular groove structure.

[0037] Furthermore, a connecting shaft is slidably inserted into the connecting hole, and a locking block with a circular block structure is fixedly installed on the rear end face of the connecting shaft. The locking block is coaxial with the connecting shaft, and a cross section c is opened on the outer circumferential surface of the locking block.

[0038] When section c faces upward, the locking block is completely housed inside the locking rotation groove; when section c does not face upward, the locking block part of the structure is limited and inserted into the locking mating groove.

[0039] Furthermore, a torsion block is fixedly installed on the front end face of the connecting shaft. The structural dimensions of the torsion block are consistent with those of the locking block, and the torsion block is coaxially arranged with the connecting shaft.

[0040] The outer peripheral surface of the twist block has a section b, and section b is oriented in the same direction as section c.

[0041] The rear end face of the torsion block is fixedly connected to the inner rear side of the locking storage groove by a locking spring, which is sleeved around the connecting shaft.

[0042] When the locking spring is in its natural state, both section b and section c face downwards.

[0043] This invention provides a prefabricated substation, which has the following advantages:

[0044] When releasing the insertion limit of the three limiting plugs, the maintenance personnel need to move to the right, rear, and left sides of the enclosure in sequence, and operate the right, middle, and left pressure plugs and temporary limiting blocks respectively. This path forces the maintenance personnel to conduct a complete inspection around the enclosure, avoiding the rough operation of directly unlocking and opening the enclosure in traditional maintenance. This ensures a comprehensive inspection of the external condition of the enclosure before maintenance. By linking this operation with observation, internal maintenance safety accidents caused by unchecked external hazards are reduced from the source, improving the integrity and safety of maintenance work.

[0045] When releasing the insertion limit of the right-side limiting plug, the maintenance personnel need to press the right-side pressing plug on the right side of the box, while an assistant needs to continuously rotate the torsion block in front of the box. Because the torsion block and the locking block are coaxial and their cross-sections are synchronized, the assistant needs to maintain the rotational force on the torsion block to overcome the reset force of the locking spring, so that the locking block can disengage from the locking groove of the temporary limiting block, allowing the maintenance personnel to smoothly rotate the temporary limiting block to fix the position of the pressing plug. This structure physically eliminates the possibility of single-person operation, avoids misoperation by a single person, and strictly implements the two-person operation system for power operation and maintenance.

[0046] In addition to traditional locks, this invention adds a mechanical locking structure to the cabinet door, consisting of central, left, and right limiting pins and corresponding limiting slots. In the natural state of the spring connector, the three limiting pins are always inserted into the limiting slots at the bottom of the cabinet door, forming a double protection of lock and mechanical pins. This ensures that when the lock is released, the locking of the three limiting pins and corresponding limiting slots must be released simultaneously to unlock the cabinet door, ensuring that maintenance personnel must strictly follow the preset unlocking procedure. Attached Figure Description

[0047] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0048] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0049] In the attached diagram:

[0050] Figure 1 This is an isometric structural diagram of the front end of the present invention.

[0051] Figure 2 This is a rear-end isometric structural diagram of the present invention.

[0052] Figure 3 This is a structural diagram of the box door in the unfolded state of the present invention.

[0053] Figure 4 This is a structural diagram of the middle plate, left side plate, and right side plate of the present invention separated from the base.

[0054] Figure 5 This is an isometric structural diagram of the top end of the present invention in the state where the connecting shaft and the connecting hole are separated.

[0055] Figure 6 This is the invention Figure 5 Enlarged view of the structure at point A in the middle.

[0056] Figure 7 This is a bottom isometric structural diagram of the present invention in the state where the connecting shaft and connecting hole are separated.

[0057] Figure 8 This is the invention Figure 7 Enlarged view of the structure at point B in the middle.

[0058] Figure 9 This is a structural diagram of the temporary limiting block of the present invention in the state of separation from the T-shaped shaft.

[0059] Figure 10 This is a partial cross-sectional view of the limiting corresponding opening portion of the present invention.

[0060] Figure 11 This is the invention Figure 10 Enlarged cross-sectional view of the central CC section.

[0061] Figure 12 This is the invention Figure 11 Structural diagram with the middle plate removed.

[0062] Figure 13 This is the invention Figure 10 Enlarged cross-sectional view of the DD section.

[0063] Figure 14 This is the invention Figure 13 Structure diagram with the connecting shaft removed.

[0064] Figure 15 This is a partial cross-sectional enlarged view of the reciprocating moving cavity portion of the present invention.

[0065] Figure 16 This is the invention Figure 15 Structural diagram with the central, left, and right panels removed.

[0066] List of reference numerals

[0067] 1. Enclosure; 101. Enclosure door; 102. Rain cover; 103. Installation chamber; 104. Limiting slot;

[0068] 2. Base; 201. T-shaped shaft; 202. Locking and receiving groove; 203. Locking and rotating groove; 204. Reciprocating moving cavity; 205. Spring receiving groove; 206. Limiting corresponding opening; 207. Pressing opening; 208. Connecting hole;

[0069] 3. Temporary limit block; 301. Shaft hole; 302. Section a; 303. Locking groove;

[0070] 4. Torsion block; 401. Connecting shaft; 402. Locking spring; 403. Locking block; 404. Section b; 405. Section c;

[0071] 5. Middle plate; 501. Middle spring connector; 502. Middle limiting post; 503. Middle pressing post;

[0072] 6. Left side plate; 601. Left side spring connector; 602. Left side limiting pin; 603. Left side pressing pin;

[0073] 7. Right side plate; 701. Right side spring connector; 702. Right side limit pin; 703. Right side pressure pin. Detailed Implementation

[0074] refer to Figures 1 to 16 :

[0075] This invention proposes a prefabricated substation, comprising: a box body 1, with a rainproof cover 102 installed on the top of the box body 1; an installation chamber 103 is opened on the front face of the box body 1 for installing high-voltage switchgear, distribution transformers, low-voltage power distribution equipment, etc.; a lockable door 101 is rotatably installed on the front face of the box body 1; the box body 1 is mounted on the top of a base 2, and a reciprocating cavity 204 is opened inside the base 2; three reciprocating cavities are evenly distributed on the front side of the top face of the base 2. The movable cavity 204 is connected to the limiting corresponding opening 206; the bottom end face of the door 101 has three limiting slots 104 evenly distributed; when the door 101 is closed, the three limiting slots 104 correspond to the three limiting corresponding openings 206 respectively; the top surface of the inner end of the reciprocating movable cavity 204 has three spring storage grooves 205 evenly distributed; a central plate 5 is provided in the middle area of ​​the reciprocating movable cavity 204, and the top surface of the central plate 5 is connected by a central spring connector 5. 01 is fixedly connected to the top surface of the inner end of the spring storage groove 205 located in the middle; a middle limiting post 502 is fixedly installed on the front side of the top end of the middle plate 5, and the middle limiting post 502 is slidably inserted into the corresponding limiting opening 206 located in the middle; a left side plate 6 is provided in the left side area of ​​the reciprocating moving cavity 204, and the top surface of the left side plate 6 is fixedly connected to the top surface of the inner end of the spring storage groove 205 located on the left side through the left spring connector 601; a middle limiting post 502 is fixedly installed on the front side of the top end of the left side plate 6. A left-side limiting post 602 is slidably inserted into the corresponding limiting opening 206 located on the left side; a right-side plate 7 is provided in the right-side region of the reciprocating moving cavity 204, and the top surface of the right-side plate 7 is fixedly connected to the top surface of the inner end of the spring storage groove 205 located on the right side through the right-side spring connector 701; a right-side limiting post 702 is fixedly installed on the front side of the top surface of the right-side plate 7, and the right-side limiting post 702 is slidably inserted into the corresponding limiting opening 206 located on the right side.

[0076] In the natural state, the top of the middle spring connector 501 passes through the top opening of the corresponding limiting hole 206 and is inserted into the middle limiting slot 104; in the natural state, the top of the left spring connector 601 passes through the top opening of the corresponding limiting hole 206 and is inserted into the left limiting slot 104; in the natural state, the top of the right spring connector 701 passes through the top opening of the corresponding limiting hole 206 and is inserted into the right limiting slot 104.

[0077] The base 2 has a pressure opening 207 on its left, rear, and right sides, which communicates with the reciprocating moving cavity 204. A central pressure column 503 is fixedly installed on the rear side of the top surface of the middle plate 5, and the central pressure column 503 is slidably inserted into the pressure opening 207 on the rear side. A left pressure column 603 is fixedly installed on the left side of the top surface of the left side plate 6, and the left pressure column 603 is slidably inserted into the pressure opening 207 on the left side. A right pressure column 703 is fixedly installed on the right side of the top surface of the right side plate 7, and the right pressure column 703 is slidably inserted into the pressure opening 207 on the right side. In its natural state, the top surface of the central pressure column 503 is higher than the top surface of the base 2. When the top surface of the central pressure column 503 is at the same position as the top surface of the base 2... When the two springs are on the same horizontal plane, the middle spring connector 501 is in a stretched state, while the middle limiting post 502 is separated from the limiting slot 104. In the natural state, the top surface of the left pressing post 603 is higher than the top surface of the base 2. When the top surface of the left pressing post 603 and the top surface of the base 2 are on the same horizontal plane, the left spring connector 601 is in a stretched state, while the left limiting post 602 is separated from the limiting slot 104. In the natural state, the top surface of the right pressing post 703 is higher than the top surface of the base 2. When the top surface of the right pressing post 703 and the top surface of the base 2 are on the same horizontal plane, the right spring connector 701 is in a stretched state, while the right limiting post 702 is separated from the limiting slot 104.

[0078] A T-shaped shaft 201 is fixedly installed on the top surface of the base 2 adjacent to three pressure openings 207. Each of the three T-shaped shafts 201 has a temporary limiting block 3 with a circular block structure rotatably mounted on it. The temporary limiting block 3 has a shaft hole 301 at its center, which is rotatably connected to the T-shaped shaft 201. A section a302 is provided on the outer circumference of the temporary limiting block 3. When the top surface of the middle pressure column 503 is higher than the top surface of the base 2, the section a302 of the temporary limiting block 3 located on the rear side contacts the outer circumference of the middle pressure column 503. When the top surface of the left pressure column 603 is higher than the top surface of the base 2, the section a302 of the temporary limiting block 3 located on the left side contacts the outer circumference of the left pressure column 603. When the top surface of the right-side pressure column 703 is higher than the top surface of the base 2, the cross section a302 of the temporary limiting block 3 on the right side contacts the outer peripheral surface of the right-side pressure column 703; when the bottom surface of the temporary limiting block 3 on the rear side contacts the top surface of the middle pressure column 503, the top surface of the middle pressure column 503 and the top surface of the base 2 are at the same level; when the bottom surface of the temporary limiting block 3 on the left side contacts the top surface of the left-side pressure column 603, the top surface of the left-side pressure column 603 and the top surface of the base 2 are at the same level; when the bottom surface of the temporary limiting block 3 on the right side contacts the top surface of the right-side pressure column 703, the top surface of the right-side pressure column 703 and the top surface of the base 2 are at the same level.

[0079] The base 2 has a circular locking and storage groove 202 on the right side of its front end face; a locking and rotating groove 203 is provided on the right side of the top surface of the base 2 adjacent to the T-shaped shaft 201. The locking and rotating groove 203 has a circular cross-section and is coaxial with the locking and storage groove 202; the axial portion of the locking and storage groove 202 and the axial portion of the locking and rotating groove 203 are connected by a connecting hole 208; the temporary limiting block 3 has a bottom end... A locking groove 303 is provided on the surface, and the locking groove 303 has an arc-shaped groove structure. When the cross-section a302 of the temporary limiting block 3 on the right side contacts the outer peripheral surface of the right-side pressing column 703, the locking groove 303 and the locking groove 303 are positioned correspondingly, and together they form a complete circular groove structure. A connecting shaft 401 is slidably inserted into the connecting hole 208, and a locking block 40 with a circular block structure is fixedly installed on the rear end face of the connecting shaft 401. 3. The locking block 403 is coaxially arranged with the connecting shaft 401. A section c405 is opened on the outer peripheral surface of the locking block 403. When the section c405 faces upward, the locking block 403 is completely housed inside the locking rotation groove 203. When the section c405 does not face upward, part of the structure of the locking block 403 is limited and inserted into the locking mating groove 303. A torsion block 4 is fixedly installed on the front end face of the connecting shaft 401. The structural dimensions of the torsion block 4 are the same as those of the locking block 403. The structural dimensions are consistent, and the twist block 4 is coaxially set with the connecting shaft 401; a section b404 is opened on the outer peripheral surface of the twist block 4, and the section b404 and section c405 are oriented in the same direction; the rear end face of the twist block 4 is fixedly connected to the inner rear side of the locking storage groove 202 by a locking spring 402, and the locking spring 402 is sleeved on the outer periphery of the connecting shaft 401; when the locking spring 402 is in its natural state, both sections b404 and c405 face downward.

[0080] Working principle:

[0081] When the door 101 is closed, based on the locking mechanism, the central limiting pin 502, the left limiting pin 602, and the right limiting pin 702 are respectively limited and inserted into the three limiting slots 104 to achieve double locking. This means that when the staff needs to turn and open the door 101, they must not only release the locking mechanism but also separate the central limiting pin 502, the left limiting pin 602, and the right limiting pin 702 from the three limiting slots 104 before the door 101 can be turned and opened.

[0082] Based on the above-mentioned double locking structure, when the operator needs to rotate and unfold the case door 101, the following steps must be followed:

[0083] 1. Release the insertion limit between the right-side limiting pin 702 and the limiting slot 104:

[0084] The maintenance personnel move to the right side of the enclosure 1, and then fully press the top of the right-side pressing post 703 into the pressing opening 207 located on the right side. During the pressing process, the right side plate 7 moves downward along the reciprocating moving cavity 204, the right-side spring connector 701 is stretched, and the right-side limiting post 702 will also slide downward along the corresponding limiting opening 206 at the same time, and finally it will disengage from the limiting slot 104, thereby releasing the insertion limit between the right-side limiting post 702 and the limiting slot 104.

[0085] Due to the reset and rebound characteristics of the right-side spring connector 701, the maintenance personnel need to rotate the temporary limit block 3 located on the right side along the T-axis 201 so that the temporary limit block 3 abuts against the right-side pressing post 703, thereby limiting the current position of the right-side plate 7 and ensuring that the right-side limiting post 702 will not re-insert into the limiting slot 104. However, since part of the locking block 403 is inserted into the locking groove 303 of the temporary limit block 3, the temporary limit block 3 cannot be rotated before the locking block 403 disengages from the locking groove 303. Therefore, another auxiliary personnel are needed to assist in rotating the torsion block 4 to synchronize the belt. The moving locking block 403 rotates along the locking rotation groove 203, while the locking spring 402 is temporarily twisted and deformed. Since the cross section b404 and the cross section c405 are set in the same direction, the auxiliary personnel can observe the position of the cross section b404 and thus accurately rotate the cross section c405 to face downwards, thereby causing the locking block 403 to disengage from the locking mating groove 303. When the auxiliary personnel apply a specific force, the maintenance personnel can rotate the temporary limiting block 3 located on the right side along the T-shaped shaft 201, so that the bottom end of the temporary limiting block 3 contacts the top end of the right pressing column 703, thereby limiting and blocking the right pressing column 703.

[0086] Furthermore, since the twist block 4 is located on the front side of the base 2, the maintenance personnel on the right side of the box 1 cannot touch the twist block 4 while pressing down on the right side pressing column 703. Moreover, the rear end face of the twist block 4 is fixedly connected to the rear side of the inner end of the locking storage groove 202 by a locking spring 402. When the locking spring 402 is in its natural state, both the cross-section b404 and the cross-section c405 face downwards. Therefore, with this structural design, the maintenance personnel cannot rotate the twist block 4 in advance, because without the continuous rotational force on the twist block 4, the temporarily twisted and deformed locking spring 402 will automatically reset and rebound.

[0087] Based on the above structural design, maintenance personnel cannot perform the insertion limit operation of the right limit plug 702 and the limit slot 104 alone. It requires the cooperation of auxiliary personnel and the application of a specific continuous force. Through this mandatory method, a two-person operation system is implemented in the daily operation, maintenance or operation of the box-type substation. The possibility of "single-person operation" is directly avoided through the physical structure, eliminating the safety risks caused by single-person operation or the inability to deal with emergencies in a timely manner from the source.

[0088] 2. Release the insertion restriction between the central limiting post 502 and the limiting slot 104:

[0089] The maintenance personnel move to the rear side of the enclosure 1, and then fully press the top of the central pressing post 503 into the pressing opening 207 located on the rear side. During the pressing process, the central plate 5 moves downward along the reciprocating moving cavity 204, the central spring connector 501 is stretched, and the central limiting post 502 will also slide downward along the corresponding limiting opening 206 at the same time, and finally it will disengage from the limiting slot 104, thereby releasing the insertion limit between the central limiting post 502 and the limiting slot 104.

[0090] At this time, the maintenance personnel can rotate the temporary limiting block 3 located on the rear side along the T-shaped axis 201, so that the temporary limiting block 3 abuts against the middle pressing column 503, thereby limiting the current position of the middle plate 5, so as to ensure that the middle limiting insert 502 will not be re-limited and inserted into the limiting slot 104.

[0091] 3. Release the insertion limit between the left limiting pin 602 and the limiting slot 104:

[0092] The maintenance personnel move to the left side of the enclosure 1, and then fully press the top of the left pressing post 603 into the pressing opening 207 located on the left side. During the pressing process, the left side plate 6 moves downward along the reciprocating moving cavity 204, the left spring connector 601 is stretched, and the left limiting post 602 will also slide downward along the corresponding limiting opening 206 at the same time, and finally it will disengage from the limiting slot 104, thereby releasing the insertion limit between the left limiting post 602 and the limiting slot 104.

[0093] At this time, the maintenance personnel can rotate the temporary limit block 3 located on the left side along the T-shaped axis 201, so that the temporary limit block 3 blocks the left pressure post 603, thereby limiting the current position of the left side plate 6 and ensuring that the left limit post 602 will not be re-limited and inserted into the limit slot 104.

[0094] Based on the above-mentioned separation operation of the central limiting plug 502, the left limiting plug 602 and the right limiting plug 702 from the limiting slot 104, the physical position is forcibly guided, so that the maintenance personnel will have to rotate around the enclosure 1 once before opening the door 101. This achieves simultaneous binding of operation and observation, ensuring that the maintenance personnel have a full grasp of the external operating status of the enclosure 1 before opening the door 101, thereby reducing internal maintenance safety accidents caused by the failure to investigate external hidden dangers from the source.

Claims

1. A prefabricated substation, comprising a prefabricated box (1), wherein a rainproof cover (102) is installed on the top of the prefabricated box (1), an installation chamber (103) is opened on the front side of the prefabricated box (1), and a door (101) with a lock is rotatably installed on the front side of the prefabricated box (1); the prefabricated box (1) is installed on the top of a base (2), characterized in that, The base (2) has a reciprocating moving cavity (204) inside. The top face of the base (2) has three limiting openings (206) that are evenly distributed and connected to the reciprocating moving cavity (204). The bottom face of the door (101) has three limiting slots (104) that are evenly distributed. When the door (101) is closed, the three limiting slots (104) correspond to the positions of the three limiting openings (206). The reciprocating moving cavity (204) has three spring storage slots (205) evenly distributed on the top surface of its inner end; A central plate (5) is provided in the central area of ​​the reciprocating moving cavity (204). The top surface of the central plate (5) is fixedly connected to the inner top surface of the spring storage groove (205) located in the middle through the central spring connector (501). A central limiting post (502) is fixedly installed on the front side of the top surface of the central plate (5). The central limiting post (502) is slidably inserted into the corresponding limiting opening (206) located in the middle. A left side plate (6) is provided on the left side of the reciprocating moving cavity (204). The top surface of the left side plate (6) is fixedly connected to the top surface of the inner end of the spring storage groove (205) located on the left side through the left side spring connector (601). A left side limiting post (602) is fixedly installed on the front side of the top surface of the left side plate (6). The left side limiting post (602) is slidably inserted into the limiting corresponding opening (206) located on the left side. A right side plate (7) is provided on the right side of the reciprocating moving cavity (204). The top surface of the right side plate (7) is fixedly connected to the top surface of the inner end of the spring storage groove (205) located on the right side through the right side spring connector (701). A right side limiting pin (702) is fixedly installed on the front side of the top surface of the right side plate (7). The right side limiting pin (702) is slidably inserted into the limiting corresponding opening (206) located on the right side. When the door (101) is closed, with the lock in place, the central limiting pin (502), the left limiting pin (602) and the right limiting pin (702) are respectively inserted into the three limiting slots (104) to achieve double locking. When it is necessary to rotate and open the door (101), while releasing the lock, the central limiting pin (502), the left limiting pin (602) and the right limiting pin (702) must be separated from the three limiting slots (104) before the door (101) can be rotated and opened.

2. A prefabricated substation according to claim 1, characterized in that, In its natural state, the top end of the middle limiting post (502) passes through the top opening of the corresponding limiting hole (206) and is inserted into the limiting slot (104) located in the middle. In its natural state, the top of the left limiting post (602) passes through the top opening of the corresponding limiting hole (206) and is inserted into the limiting slot (104) located on the left side. In its natural state, the top of the right-side spring connector (701) passes through the top opening of the corresponding limiting hole (206) and is inserted into the limiting slot (104) located on the right side.

3. A prefabricated substation according to claim 2, characterized in that, The base (2) has a pressure opening (207) on the left, rear and right sides of the top surface, which is connected to the reciprocating moving cavity (204). A central pressing column (503) is fixedly installed on the rear side of the top surface of the central plate (5), and the central pressing column (503) is slidably inserted into the pressing opening (207) located on the rear side. A left-side pressure post (603) is fixedly installed on the left side of the top surface of the left side plate (6), and the left-side pressure post (603) is slidably inserted into the pressure opening (207) located on the left side; A right-side pressure post (703) is fixedly installed on the right side of the top surface of the right side plate (7), and the right-side pressure post (703) is slidably inserted into the pressure opening (207) located on the right side.

4. A prefabricated substation according to claim 3, characterized in that, In its natural state, the top surface of the middle spring connector (501) is higher than the top surface of the base (2); When the top surface of the middle pressing post (503) and the top surface of the base (2) are on the same horizontal plane, the middle spring connector (501) is in a stretched state, and the middle limiting insert (502) is separated from the limiting slot (104); In its natural state, the top surface of the left-side spring connector (601) is higher than the top surface of the base (2); When the top surface of the left pressure post (603) and the top surface of the base (2) are on the same horizontal plane, the left spring connector (601) is in a stretched state, and the left limiting post (602) is separated from the limiting slot (104); In its natural state, the top surface of the right-side spring connector (701) is higher than the top surface of the base (2); When the top surface of the right-side pressing post (703) is on the same horizontal plane as the top surface of the base (2), the right-side spring connector (701) is in a stretched state, and the right-side limiting insert (702) is separated from the limiting slot (104).

5. A prefabricated substation according to claim 4, characterized in that, A T-shaped shaft (201) is fixedly installed on the top surface of the base (2) at three adjacent pressure openings (207). Each of the three T-shaped shafts (201) is rotatably mounted with a temporary limiting block (3) in the form of a circular block structure. The temporary limiting block (3) has a shaft hole (301) at its axial center, and the shaft hole (301) is rotatably connected to the T-shaped shaft (201). The temporary limiting block (3) has a cross section a (302) on its outer peripheral surface; When the top surface of the middle pressure column (503) is higher than the top surface of the base (2), the section a (302) of the temporary limiting block (3) located on the rear side contacts the outer peripheral surface of the middle pressure column (503); When the top surface of the left-side pressure column (603) is higher than the top surface of the base (2), the section a (302) of the temporary limiting block (3) on the left side comes into contact with the outer peripheral surface of the left-side pressure column (603); When the top surface of the right-side pressure column (703) is higher than the top surface of the base (2), the cross section a (302) of the temporary limiting block (3) located on the right side comes into contact with the outer peripheral surface of the right-side pressure column (703).

6. A prefabricated substation according to claim 5, characterized in that, When the bottom surface of the temporary limiting block (3) located on the rear side comes into contact with the top surface of the middle pressing column (503), the top surface of the middle pressing column (503) and the top surface of the base (2) are at the same level. When the bottom surface of the temporary limiting block (3) on the left side comes into contact with the top surface of the left pressure column (603), the top surface of the left pressure column (603) and the top surface of the base (2) are at the same level. When the bottom surface of the temporary limiting block (3) on the right side comes into contact with the top surface of the right pressure column (703), the top surface of the right pressure column (703) and the top surface of the base (2) are at the same level.

7. A prefabricated substation according to claim 6, characterized in that, The base (2) has a locking and storage groove (202) with a circular groove structure on the right side of its front end face; A locking rotation groove (203) is provided on the right side of the top surface of the base (2) adjacent to the T-shaped shaft (201). The locking rotation groove (203) has a cross-section with a superior arc circle structure. The locking rotation groove (203) and the locking storage groove (202) are coaxially arranged. The locking storage groove (202) and the locking rotation groove (203) are connected by a connecting hole (208); The temporary limiting block (3) has a locking groove (303) on its bottom end surface, and the locking groove (303) has an arc-shaped groove structure; When the cross section a (302) of the temporary limiting block (3) on the right side comes into contact with the outer peripheral surface of the right-side pressing column (703), the locking groove (303) and the locking groove (303) are positioned correspondingly, and together they form a complete circular groove structure.

8. A prefabricated substation according to claim 7, characterized in that, A connecting shaft (401) is slidably inserted into the connecting hole (208). A locking block (403) with a circular block structure is fixedly installed on the rear end face of the connecting shaft (401). The locking block (403) is coaxially arranged with the connecting shaft (401). A cross section c (405) is opened on the outer peripheral surface of the locking block (403). When section c (405) faces upward, the locking block (403) is completely housed inside the locking rotation groove (203); when section c (405) does not face upward, part of the locking block (403) is partially inserted into the locking mating groove (303).

9. A prefabricated substation according to claim 8, characterized in that, A torsion block (4) is fixedly installed on the front end face of the connecting shaft (401). The structural dimensions of the torsion block (4) are consistent with the structural dimensions of the locking block (403). The torsion block (4) is coaxially arranged with the connecting shaft (401). The outer peripheral surface of the twist block (4) has a cross section b (404), and the cross section b (404) and the cross section c (405) are oriented in the same direction; The rear end face of the torsion block (4) is fixedly connected to the inner rear side of the locking storage groove (202) by a locking spring (402), and the locking spring (402) is sleeved on the outer side of the connecting shaft (401). When the locking spring (402) is in its natural state, both section b (404) and section c (405) face downwards.

Images