Transformer substation convenient to maintain

Abstract

The invention relates to the technical field of power transformation equipment, in particular to a transformer substation convenient to maintain, which comprises a box body and an electric appliance cabinet, the bottom of the electric appliance cabinet is in sliding fit with the box body through a telescopic first sliding rail assembly and a telescopic second sliding rail assembly, and the second sliding rail assembly comprises a sliding part arranged at the bottom of the electric appliance cabinet. The outer rail body is installed on the electric appliance cabinet, the top of the outer rail body is provided with a first guide part matched with the sliding part, a telescopic frame is installed in the outer rail body, a second guide part which can ascend and descend and is matched with the first guide part is installed in the telescopic frame, and supporting legs which can be folded and unfolded are installed on the telescopic frame. The electric appliance cabinet can be pulled out of the cabinet body of the transformer substation by installing the first sliding rail assembly and the second sliding rail assembly, and parts located on the back face of the electric appliance cabinet can be maintained and replaced.

Description

Technical Field

[0001] The present invention relates to the technical field of substation equipment, and particularly relates to a substation that is convenient for maintenance. Background Art

[0002] A box-type substation, also called a prefabricated substation or a prefabricated transformer substation, is a substation that organically combines functions such as transformer step-down and low-voltage power distribution and is installed in a steel structure box. Usually, a dry-type transformer and several high-voltage switch cabinets and low-voltage switch cabinets are installed in the box-type substation. Due to the limited internal space of the box-type substation, the intervals between the switch cabinets are quite compact, making it inconvenient to operate when maintaining these switch cabinets. Especially when it is necessary to maintain the components on the back of the switch cabinet, the operation is even more inconvenient. Summary of the Invention

[0003] In order to solve the defects in the prior art, the present invention provides a substation that is convenient for maintenance, which is specifically realized through the following technical solutions: A substation that is convenient for maintenance includes a box body and a switch cabinet. The bottom of the switch cabinet is slidably matched with the box body through a retractable first slide rail assembly and a second slide rail assembly. The second slide rail assembly includes a sliding member installed at the bottom of the switch cabinet and an outer rail body installed on the switch cabinet. A first guide member matching the sliding member is installed at the top of the outer rail body. A telescopic frame is installed inside the outer rail body, and a liftable second guide member is installed inside the telescopic frame. After the telescopic frame extends out of the outer rail body, the second guide member rises and keeps the second guide member flush with the first guide member. It also includes several limiting members for limiting the switch cabinet. The limiting members can slide on the second guide member and the first guide member. The several limiting members are distributed on both sides of the switch cabinet. A pull rod is installed at the top of the switch cabinet, and the pull rod can be detachably connected to the box body. A retractable and retractable support leg is installed on the telescopic frame.

[0004] Several first push blocks are fixedly installed at the bottom of the second guide member. A first inclined wall is provided at the bottom of the first push block. A rotatable lead screw is installed inside the telescopic frame. Second push blocks corresponding to the first push blocks one by one are installed on the lead screw. A second inclined wall matching the first inclined wall is provided at the top of the second push block. The bottom of the second push block is slidably matched with the telescopic frame.

[0005] First guide blocks are fixedly installed on both sides of the first push block. A guide rail slidably matched with the first guide block is installed inside the telescopic frame, and the guide rail is vertically arranged.

[0006] At least one slide bar parallel to the lead screw is also fixedly installed inside the telescopic frame, and the slide bar is slidably matched with the second push block.

[0007] The limiting member is provided with a vertical internal thread through hole, and a locking bolt is installed in the internal thread through hole; after the locking bolt is tightened, the bottom abuts against the first guiding member or the first guiding member, so as to realize the locking of the limiting member.

[0008] The first guiding member is a convex beam installed at the top of the outer rail body, the second guiding member is a telescopic beam, and when the telescopic beam rises, the top is flush with the top of the convex beam.

[0009] A hook is fixedly installed at the second end of the pull rod, a connecting ring is fixedly installed at the first end of the pull rod, the connecting ring is installed on a pull ring located at the top of the electrical cabinet, and a hanging hole matching the hook is provided on the box body.

[0010] The first slide rail assembly adopts a drawer slide rail.

[0011] A partition member is installed in the middle of the box body, a stud is installed on the partition member, an ear plate is fixedly installed on the side wall of the electrical cabinet, and after the electrical cabinet is pushed into the box body, the stud passes through the ear plate and a nut is installed.

[0012] The sliding member is a roller assembly.

[0013] The technical solution of the present invention has the following advantages: In the present invention, by installing the first slide rail assembly and the second slide rail assembly, the electrical cabinet can be pulled out from the cabinet body of the substation, and the components located on the back of the electrical cabinet can be repaired and replaced.

[0014] By installing a telescopic frame on the second slide rail assembly, it not only ensures that the overall length of the slide rail is sufficient, but also can retract the telescopic frame when not in use, saving space.

[0015] Installing the auxiliary positioning assembly can effectively maintain the stability of the electrical cabinet during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention; Figure 2 It is a front view structural schematic diagram of Embodiment 1 of the present invention; Figure 3 It is a schematic diagram of the cooperation relationship between the electrical cabinet and the first slide rail assembly and the second slide rail assembly; Figure 4 is Figure 3 a schematic structural diagram of position A in Figure 5 is Figure 3 a schematic structural diagram of position B in Figure 6 is Figure 3 a schematic structural diagram of position C in Figure 7 is a schematic structural diagram of the second slide rail; Figure 8 is a front view structural diagram of the second slide rail; Figure 9 is a schematic structural diagram of the roller assembly; Figure 10 is a schematic structural diagram of the outer rail body; Figure 11 is a schematic structural diagram of the telescopic beam; Figure 12 is Figure 11 a schematic structural diagram of position D in Figure 13 is a schematic structural diagram of the telescopic frame Figure One ; Figure 14 is a schematic structural diagram of the telescopic frame Figure Two ; Figure 15 is Figure 14 a schematic structural diagram of position E in Figure 16 is a schematic structural diagram of the first limiting member; Figure 17 is a schematic structural diagram of the second limiting member; Figure 18 is a front view structural diagram of the second embodiment of the present invention.

[0018] In the figure, 1 - box body; 2 - dry-type transformer; 3 - partition board; 4 - electrical cabinet, 401 - ear plate, 402 - stud; 5 - box door; 6 - bottom plate; 7 - first slide rail assembly, 701 - cross beam, 702 - suspension rod, 703 - first slide rail; 8 - Second slide rail assembly, 801 - Second slide rail, 802 - Roller assembly, 803 - Outer rail body, 804 - Convex beam, 805 - Telescopic frame, 806 - First limiting member, 807 - Second limiting member, 808 - Wheel body, 809 - Wheel seat, 810 - Slide hole, 811 - Limiting groove, 812 - First receiving groove, 813 - Second receiving groove, 814 - Third receiving groove, 815 - Telescopic beam, 816 - First inclined wall, 817 - First guiding block, 818 - First pushing block, 819 - Second limiting groove, 820 - First limiting convex edge, 821 - Guide plate, 822 - Lead screw, 823 - Slide bar, 824 - Second pushing block, 825 - Handle, 826 - Hexagon socket head cap screw hole, 827 - Leg, 828 - First limiting light hole, 829 - Hinge post, 830 - Limiting bolt, 831 - Guide rail, 832 - Limiting block, 833 - Convex block, 834 - Locking bolt, 835 - Chute, 836 - Second limiting convex edge, 837 - First connecting rod, 838 - First through hole; 9 - Auxiliary positioning assembly, 901 - Pull rod, 902 - Hook, 903 - Pull ring, 904 - Connecting ring. Detailed implementation mode

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred modules or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] As shown in the Figure 1 accompanying drawings, the present invention provides a substation that is convenient for maintenance. The substation is a box-type substation, which includes a box body 1 equipped with a plurality of box doors 5. The bottom of the box body 1 is fixedly installed with a bottom plate 6, and a partition 3 is fixedly installed inside. Among them, the partition 3 is used to provide fixed points for various wires. A dry-type transformer 2 is fixedly installed on the bottom plate 6 through bolts.

[0024] A plurality of electrical cabinets 4 are also installed in the box body 1, and only one of them is shown in the accompanying drawings of the present invention. As shown in the Figure 2 accompanying drawings, the top of the electrical cabinet 4 is slidably matched with the box body 1 through a first slide rail assembly 7, and the bottom of the electrical cabinet 4 is slidably matched with the box body 1 through a second slide rail assembly 8. By installing the first slide rail assembly 7 and the second slide rail assembly 8, the electrical cabinet 4 can be pushed into or pulled out of the box body 1, which is convenient for maintaining the electrical cabinet 4.

[0025] As shown in the Figure 3 and the Figure 4 accompanying drawings, the first slide rail assembly 7 includes a cross beam 701. The top of the cross beam 701 is fixedly installed with a plurality of vertical suspension rods 702. The top of the suspension rod 702 is provided with a threaded section. During installation, the threaded section passes through a reserved hole on the support beam of the box body 1, and then a nut is installed to realize the fixed installation of the cross beam 701.

[0026] The bottom of the cross beam 701 is fixedly installed with a first slide rail 703. The structure of the first slide rail 703 is the same as that of a drawer slide rail, and will not be elaborated here.

[0027] The fixed part of the first slide rail 703 is fixed to the bottom of the cross beam 701 through bolts, and the telescopic part is fixed to the top of the electrical cabinet 4 through bolts.

[0028] The structure of the second slide rail assembly 8 is as shown in the Figure 6 accompanying drawings, and includes a second slide rail 801 fixedly installed on the bottom plate 6 and a roller assembly 802 fixedly installed at the bottom of the electrical cabinet 4. The roller assembly 802 can move along the second slide rail 801.

[0029] The structure of the second slide rail 801 is as shown in the Figure 7 and the Figure 8 accompanying drawings, and includes an outer rail body 803. Along the length direction of the top of the outer rail body 803, a convex beam 804 is fixedly installed. A first limiting member 806 and a second limiting member 807 are fixedly installed on the convex beam 804. The aforementioned roller assembly 802 moves on the convex beam 804 and is always located between the first limiting member 806 and the second limiting member 807.

[0030] The first limiting member 806 and the second limiting member 807 can be locked with the convex beam 804, thereby restricting the back-and-forth movement of the roller assembly 802.

[0031] A telescopic frame 805 is slidably installed inside the outer rail body 803, and the telescopic frame 805 can be pulled out from the outer rail body 803.

[0032] A telescopic beam 815 capable of lifting is installed inside the telescopic frame 805, and the length direction of the telescopic beam 815 is the same as the length direction of the telescopic frame 805. When the telescopic beam 815 rises, its top is flush with the top of the convex beam 804, so that the electrical cabinet 4 can be pulled onto the telescopic beam 815.

[0033] The structure of the roller assembly 802 is as shown in the appendix Figure 9 and includes a wheel seat 809. A wheel body 808 is rotatably installed on the wheel seat 809. An annular guide groove is provided in the middle of the wheel body 808, and the convex beam 804 is located in the guide groove. The wheel seat 809 is installed at the bottom of the electrical cabinet 4 by bolts.

[0034] The structure of the telescopic beam 815 is as shown in the appendix Figure 11 and the appendix Figure 12 and includes at least two pairs of first push blocks 818 arranged at the bottom of the telescopic beam 815. Each pair includes two first push blocks 818, and the two first push blocks 818 are arranged in a mirror image. A first inclined wall 816 is provided at the bottom of each first push block 818.

[0035] First guide blocks 817 are fixedly installed on both sides of the first push block 818.

[0036] The mechanism of the telescopic frame 805 is as shown in the appendix Figure 13 and the appendix Figure 14 and the appendix Figure 15 and includes a receiving cavity provided inside the telescopic frame 805. An opening for the telescopic beam 815 to move is provided at the top of the receiving cavity, and the length direction of the opening is the same as the length direction of the telescopic frame 805. Vertical guide plates 821 are fixedly installed on both sides of the opening.

[0037] First limiting ridges 820 are fixedly installed on both sides of the top of the telescopic frame 805, and the length direction of the first limiting ridges 820 is the same as the length direction of the telescopic frame 805.

[0038] As shown in the appendix Figure 13 and the appendix Figure 15As shown, a number of vertical guide rails 831 are fixedly installed on both side walls of the accommodation cavity. The aforementioned first guide block 817 is located inside the guide rail 831 and is in sliding fit with the guide rail 831. The guide rail 831 extends vertically upward from the middle of the accommodation cavity, and its top is flush with the top of the guide plate 821. A baffle is fixedly installed at the bottom of the guide rail 831. When the telescopic beam 815 descends to the lowest position, the bottom of the first guide block 817 abuts against the top of the baffle.

[0039] Due to the existence of the guide rail 831, the first guide block 817 can only move in the vertical direction, thereby ensuring that the telescopic beam 815 can only be lifted and lowered in the vertical direction.

[0040] As shown in the appendix Figure 13 As shown, a rotatable lead screw 822 is installed inside the telescopic frame 805. Specifically, the lead screw 822 penetrates the telescopic frame 805 along the length direction of the telescopic frame 805, and both ends of the lead screw 822 are rotationally fitted with the telescopic frame 805 through bearings.

[0041] The first end of the lead screw 822 penetrates out of the telescopic frame 805 and is provided with an internal hexagonal hole 826. During use, a hexagonal wrench can be inserted into the internal hexagonal hole 826 to realize the rotation of the lead screw 822.

[0042] At least two pairs of second push blocks 824 are installed on the lead screw 822. Each pair has two second push blocks 824, and the second push blocks 824 correspond to the first push blocks 818 one by one.

[0043] The top of the second push block 824 is provided with a second inclined wall that matches the first inclined wall 816.

[0044] The bottom of the second push block 824 is in sliding fit with the bottom of the accommodation cavity.

[0045] The thread helix directions of the lead screw 822 corresponding to two adjacent second push blocks 824 are opposite, that is, the thread helix directions of the lead screw 822 corresponding to the same pair of second push blocks 824 are opposite. Thus, when the lead screw 822 rotates, a pair of second push blocks 824 move in a mirror image manner. When a pair of second push blocks 824 move towards each other, they exert pressure on the corresponding first push block 818, causing the first push block 818 to move upward, and the telescopic beam 815 then rises. When a pair of second push blocks 824 move in the opposite direction, the telescopic beam 815 descends.

[0046] At least one slide bar 823 parallel to the lead screw 822 is also fixedly installed inside the telescopic frame 805. The slide bar 823 penetrates the second push block 824 and is in sliding fit with the second push block 824.

[0047] In this embodiment, the first inclined walls 816 at the bottom of the first push block 818 can also all face one direction. Correspondingly, the second inclined walls of the second push block 824 also all face one direction. At this time, only one thread direction needs to be provided on the lead screw 822.

[0048] A handle 825 is fixedly installed at the top of the first end of the telescopic frame 805. The handle 825 is used to pull the telescopic frame 805 out from inside the outer rail body 803.

[0049] As shown in the appendix Figure 14 Both sides of the first end of the telescopic frame 805 are provided with retractable legs 827. When the legs 827 are lowered, the second end contacts the ground to support the telescopic frame 805.

[0050] As shown in the appendix Figure 15 As shown, a hinge hole, a first limiting light hole 828 and a second limiting light hole are provided at the first end of the leg 827. An articulated column 829 hinged to the hinge hole is fixedly installed on the telescopic frame 805. Limiting screw holes corresponding one by one to the first limiting light hole 828 and the second limiting light hole are also provided on the telescopic frame 805. It also includes a limiting bolt 830 that can be screwed into the limiting screw hole.

[0051] When the leg 827 is retracted, as shown in the appendix Figure 15 As shown, its length direction is the same as that of the telescopic frame 805. The limiting bolt 830 passes through the first limiting light hole 828 or the second limiting light hole and is screwed into the corresponding limiting screw hole. When the leg 827 is deployed, its length is perpendicular to the length direction of the telescopic frame 805. The limiting bolt 830 passes through the second limiting light hole and is screwed into the corresponding limiting screw hole.

[0052] As shown in the appendix Figure 15 As shown, in this embodiment, a virtual isosceles right triangle is formed among the hinge hole, the first limiting light hole 828 and the second limiting light hole, and the hinge hole is located at the right angle point.

[0053] Of course, the number of legs 827 can also be more, making the support for the telescopic frame 805 more stable. The deployment method of the legs 827 can also adopt other structures in the prior art.

[0054] The structure of the outer rail body 803 is as shown in the appendix Figure 10 As shown, the foregoing convex beam 804 is installed on the top of the outer rail body 803 by bolts. Of course, the outer rail body 803 and the convex beam 804 can also be integrally formed.

[0055] The outer rail body 803 is provided with a sliding hole 810 which runs through the outer rail body 803 along its length direction. On both side walls of the sliding hole 810, a first receiving groove 812 and a second receiving groove 813 are provided. The first receiving groove 812 is used to receive the support leg 827, and the second receiving groove 813 is in sliding fit with the first limiting convex edge 820. The length of the first limiting convex edge 820 is the same as that of the telescopic frame 805. Through the cooperation between the second receiving groove 813 and the first limiting convex edge 820, it can be ensured that the telescopic frame 805 can only move back and forth along the sliding hole 810.

[0056] On the top wall of the sliding hole 810, a third receiving groove 814 for receiving the telescopic beam 815 is provided, and the length of the third receiving groove 814 is the same as that of the outer rail body 803.

[0057] The structures of the aforementioned first limiting member 806 and second limiting member 807 are the same, and both include a limiting block 832. The top of the limiting block 832 is inclined, and an inclined convex block 833 is also provided on the top of the limiting block 832; the inclination of the convex block 833 is the same as that of the top of the limiting block 832, and the width of the convex block 833 is the same as the width of the guide groove.

[0058] At the bottom of the limiting block 832, a sliding groove 835 matching the telescopic beam 815 and the convex beam 804 is provided. The telescopic beam 815 and the convex beam 804 can pass through the sliding groove 835 and interact with the sliding groove 835.

[0059] On both sides of the sliding groove 835, second limiting convex edges 836 are fixedly installed. The aforementioned telescopic beam 815 and convex beam 804 are respectively provided with second limiting grooves 819 and first limiting grooves that are in sliding fit with the second limiting convex edges 836.

[0060] On the limiting block 832, a vertical internally threaded through hole is provided, which runs through the limiting block 832 and the convex block 833, and a locking bolt 834 is installed inside; when the locking bolt 834 is tightened, the bottom of the locking bolt 834 abuts against the telescopic beam 815 or the convex beam 804, realizing the locking of the first limiting member 806 and the second limiting member 807.

[0061] In this embodiment, the top of the limiting block 832 can be inclined, or the convex block 833 can be not provided.

[0062] During actual installation, the first limiting member 806 is located on the side close to the cabinet door of the electrical cabinet 4, and the second limiting member 807 is located on the side far from the cabinet door of the electrical cabinet 4. Therefore, on one side of the limiting block 832 of the second limiting member 807, a first connecting rod 837 is fixedly installed, and a first through hole 838 is provided on the first connecting rod 837; as shown in the appendix Figure 7As shown, a second connecting rod is fixedly installed on the top of the first end of the outer rail body 803. A second through hole is provided in the second connecting rod, and a rope is connected between the first through hole 838 and the second through hole. When the electrical cabinet 4 is pulled onto the telescopic beam 815, the rope is pulled to pull out the second limiting member 807. Installing the rope between the second connecting rod and the first connecting rod 837 can effectively maintain the position of the rope and facilitate use.

[0063] In this embodiment, the roller assembly 802 can also be replaced with a sliding member such as a slider that slidably cooperates with the convex beam 804 and the telescopic beam 815. At this time, the limiting block 832 can be just a square stopper.

[0064] In this embodiment, the convex beam 804 and the telescopic beam 815 can be replaced with a groove and a telescopic groove that also have a guiding function. At this time, the roller assembly 802 or the slider cooperates in the groove and the telescopic groove, and the first limiting member 806 and the second limiting member 807 also slidably cooperate in the groove and the telescopic groove.

[0065] In this embodiment, the component that pushes the telescopic beam 815 to lift can also be replaced with a structure in other existing technologies. For example, the first end of the telescopic frame 805 is open, and when in use, a long strip-shaped cushion block is directly inserted to lift the telescopic beam 815.

[0066] As shown in the appendix Figure 10 As shown, two parallel limiting grooves 811 are provided at the bottom of the sliding hole 810, and the first end of the limiting groove 811 is closed and the second end communicates with the outside; two fixing blocks corresponding to the limiting grooves 811 one by one are fixedly installed at the bottom of the telescopic frame 805. The fixing blocks are located in the limiting grooves 811 and slidably cooperate with the limiting grooves 811. Adopting this structure can prevent the telescopic frame 805 from disengaging from the sliding hole 810.

[0067] As shown in the appendix Figure 3 and the appendix Figure 4 and the appendix Figure 5 As shown, an auxiliary positioning assembly 9 is installed on the top of the electrical cabinet 4. Specifically, the auxiliary positioning assembly 9 includes a pull ring 903 installed on the top of the electrical cabinet 4 by means of a thread. The connecting pull ring 903 can also directly utilize the lifting ring on the top of the electrical cabinet 4.

[0068] A connecting ring 904 is installed on the pull ring 903. The connecting ring 904 fixedly installs the first end of the pull rod 901, and the second end of the pull rod 901 is fixedly installed with a hook 902. As shown in the appendix Figure 2 As shown, a hanging hole matching the hook 902 is provided on the box body 1. When the electrical cabinet 4 is pulled out of the box body 1, the hook 902 is hung on the hanging hole to keep the electrical cabinet 4 stable.

[0069] Of course, the auxiliary positioning assembly 9 can also be installed at the bottom of the electrical cabinet 4 at the same time.

[0070] In another embodiment, in order to keep the electric cabinet 4 stable when it is normally used in the box body 1, as shown in the attached Figure 18 figure, an ear plate 401 is fixedly installed on the side wall of the electric cabinet 4, and a stud 402 is fixedly installed on the partition plate 3. After the electric cabinet 4 is pushed into the box body 1, the stud 402 passes through the ear plate 401, and then a nut is installed to fix the electric cabinet 4.

[0071] In the above embodiment, the partition plate 3 can also be replaced with a partition member of a frame structure.

[0072] Obviously, the above embodiments are only examples given for clear illustration, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A substation that is convenient for maintenance, characterized in that: It includes a box body (1) and an electrical cabinet (4). The bottom of the electrical cabinet (4) is slidably engaged with the box body (1) through a retractable first slide rail assembly (7) and a second slide rail assembly (8). The second slide rail assembly (8) includes a sliding member installed at the bottom of the electrical cabinet (4) and an outer rail body (803) installed on the electrical cabinet (4). A first guide member matching the sliding member is installed at the top of the outer rail body (803). A telescopic frame (805) is installed inside the outer rail body (803). A second guide member capable of lifting is installed inside the telescopic frame (805). After the telescopic frame (805) extends out of the outer rail body (803), the second guide member rises and remains flush with the first guide member. It also includes several limiting members for limiting the electrical cabinet (4). The limiting members can slide on the second guide member and the first guide member. Several of the limiting members are distributed on both sides of the electrical cabinet (4). A pull rod (901) is installed at the top of the electrical cabinet (4). The pull rod (901) can be detachably connected to the box body (1). A retractable support leg (827) is installed on the telescopic frame (805).

2. The substation that is convenient for maintenance according to claim 1, wherein: Several first push blocks (818) are fixedly installed at the bottom of the second guide member. A first inclined wall (816) is provided at the bottom of the first push block (818). A rotatable lead screw (822) is installed inside the telescopic frame (805). Second push blocks (824) corresponding to the first push blocks (818) one by one are installed on the lead screw (822). A second inclined wall matching the first inclined wall (816) is provided at the top of the second push block (824). The bottom of the second push block (824) is slidably engaged with the telescopic frame (805).

3. The substation facilitating maintenance according to claim 2, wherein: First guide blocks (817) are fixedly installed on both sides of the first push block (818). A guide rail (831) slidably engaged with the first guide block (817) is installed inside the telescopic frame (805). The guide rail (831) is vertically arranged.

4. The substation that is convenient for maintenance according to claim 3, characterized in that: At least one slide bar (823) parallel to the lead screw (822) is also fixedly installed inside the telescopic frame (805). The slide bar (823) is slidably engaged with the second push block (824).

5. The substation facilitating maintenance according to claim 1, wherein: A vertical internal thread through hole is provided on the limiting member. A locking bolt (834) is installed inside the vertical internal thread through hole. After the locking bolt (834) is tightened, the bottom abuts against the first guide member or the first guide member to realize the locking of the limiting member.

6. The substation that is convenient for maintenance according to any one of claims 1 to 5, characterized in that: The first guide member is a convex beam (804) installed at the top of the outer rail body (803). The second guide member is a telescopic beam (815). When the telescopic beam (815) rises, the top is flush with the top of the convex beam (804).

7. The substation that is convenient for maintenance according to claim 1, wherein: A hook (902) is fixedly installed at the second end of the pull rod (901). A connecting ring (904) is fixedly installed at the first end of the pull rod (901). The connecting ring (904) is installed on a pull ring (903) located at the top of the electrical cabinet (4). A hanging hole matching the hook (902) is provided on the box body (1).

8. The substation convenient for maintenance according to claim 1, characterized in that: The first slide rail assembly (7) adopts a drawer slide rail.

9. The substation that is convenient for maintenance according to claim 1, wherein: A partition is installed in the middle of the box body (1). A stud (402) is installed on the partition. An ear plate (401) is fixedly installed on the side wall of the electrical cabinet (4). After the electrical cabinet (4) is pushed into the box body (1), the stud (402) passes through the ear plate (401), and a nut is installed.

10. The substation convenient for maintenance according to claim 1, characterized in that: The sliding component is a roller assembly (802).

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