Maintenance frame for electric power engineering construction

Abstract

The invention belongs to the field of scaffolds, and particularly relates to a maintenance frame for electric power engineering construction, which comprises a scaffold main body and two groups of extension plates, the top end of the scaffold main body is fixedly connected with a top-layer platform plate, and the top ends of the front and rear sides of the top-layer platform plate are fixedly connected with a plurality of groups of first protection rods; unfolding mechanisms are arranged on the left side and the right side of the top-layer platform plate, the unfolding mechanisms are used for horizontally unfolding the extension plates so as to expand the activity space on the top-layer platform plate and further facilitate maintenance, a supporting mechanism is arranged at the bottom end of the top-layer platform plate, and the supporting mechanism is used for supporting the bottom ends of the extension plates. A fixing mechanism is arranged at the top end of the top-layer platform plate; through the structural design of the unfolding mechanism, the function that the two sets of extension plates on the top-layer platform plate are unfolded towards the two sides is achieved, so that the supporting area of the top-layer platform plate is expanded through the extension plates, a larger activity space is provided for maintainers, and maintenance is facilitated.

Description

Technical Field

[0001] The invention relates to the field of scaffolds, in particular to a maintenance frame for electric power engineering construction. Background Art

[0002] During the construction of power projects, some power equipment needs to be regularly inspected and maintained. Since the power equipment is generally installed at a high height, an insulating inspection rack will be built directly below to facilitate maintenance work.

[0003] An insulating scaffold for power construction with publication number CN117344952A includes a scaffold body, which is divided into three parts. The bottom of the scaffold body is provided with a bottom support structure. Furthermore, the scaffold body is composed of a bottom support structure, a connecting layer structure and a top support structure. Four corners of the bottom support structure are provided with columns, and a plurality of climbing poles are fixedly connected between two of the columns, and hollow plate components are clamped on the climbing poles. The insulating scaffold of the present invention is specifically used in power construction. The present invention can be used by stacking the supporting structure, connecting layer structure and top support structure as needed. When disassembling, the scaffold can be disassembled and assembled by disassembling the fixing bolts 1 and 2. It is convenient and quick to use, and the power maintenance efficiency is high.

[0004] However, although the insulating scaffolding used for power construction in the above technology is easy to disassemble to improve the efficiency of power maintenance, after the scaffolding is installed, the space that can be provided by the top platform plate for maintenance personnel is relatively limited. For example, when repairing a telephone pole, due to the limited space for movement, other personnel are sometimes required to climb up the telephone pole and then cooperate with the maintenance personnel on the scaffolding to successfully complete the maintenance work, which is quite inconvenient. Therefore, in view of the above problem, a maintenance frame for power engineering construction is proposed. Summary of the invention

[0005] In order to solve the problem that the insulating scaffolding used for power construction in the above technology is convenient to disassemble the scaffolding to improve the efficiency of power maintenance, after the scaffolding is installed, the space that can be provided by the top platform board for maintenance personnel is relatively limited. For example, when repairing electric poles, due to the limited activity space, sometimes other personnel are required to climb up the electric poles and then cooperate with the maintenance personnel on the scaffolding to successfully complete the maintenance work, which is quite inconvenient. The present invention proposes a maintenance frame for power engineering construction.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the maintenance frame for power engineering construction described in the present invention includes a scaffolding main body and two groups of extension plates, the top of the scaffolding main body is fixedly connected with a top platform plate, and the tops of the front and rear sides of the top platform plate are fixedly connected with multiple groups of first protective rods, and the left and right sides of the top platform plate are provided with an unfolding mechanism, and the unfolding mechanism is used to unfold the extension plate horizontally so as to expand the activity space on the top platform plate, thereby facilitating maintenance, and the bottom end of the top platform plate is provided with a supporting mechanism, and the supporting mechanism is used to provide support for the bottom end of the extension plate, and the top of the top platform plate is provided with a fixing mechanism, and the fixing mechanism is used to fix the unfolded extension plate to prevent the extension plate from rotating again.

[0007] Preferably, the unfolding mechanism includes two groups of rotating grooves, the two groups of rotating grooves are respectively opened on the left and right sides of the top platform plate, and the bottom end of the extension plate is rotatably connected to the rotating grooves; it also includes two groups of fixed gears, the two groups of fixed gears are respectively fixedly connected to the front and rear sides of the rotating shaft at the bottom end of the extension plate, the bottom ends of the fixed gears are meshed with movable racks, and the movable racks are slidably mounted on the inner wall of the mounting plate and the fixed plate, the fixed plate is fixedly connected to the mounting plate, the mounting plate is fixedly connected to the front and rear sides of the top platform plate, the middle part of the mounting plate is fixedly connected with a protrusion, the protrusion is inserted with a pin, the bottom end of the pin is inserted in the fixing hole, the fixing hole is opened on the connecting rod and the connecting column, one side of the connecting rod and the connecting column are fixedly connected to the movable rack, and the connecting rod and the connecting column are slidably mounted on the mounting plate.

[0008] Preferably, the supporting mechanism includes a fixing rod, and the fixing rod is provided with two groups. The fixing rod on the left side is fixedly connected to the connecting rod, and the fixing rod on the right side is fixedly connected to the connecting column. The bottom end of the fixing rod is fixedly connected to three groups of supporting plates. The top end of the supporting plate is slidably connected to the inside of the sliding groove. The sliding groove is opened at the bottom end of the top platform plate, and the top end of the support plate is kept level with the inner wall of the bottom end of the rotating groove.

[0009] Preferably, the fixing mechanism includes two groups of pulling rods, the pulling rod is rotatably connected to one side of the fixing rod, the side of the pulling rod away from the fixing rod is rotatably connected to the bottom end of the rotating disk, the top end of the rotating disk is fixedly connected with a rotating shaft, the cross-section of the rotating shaft is cross-shaped, the rotating shaft is rotatably connected to the inside of the top platform plate, the top end of the rotating shaft is fixedly connected with a circular disk, the circular disk is rotatably connected to the inside of a groove, the groove is opened at the top of the top platform plate, the bottom end of the inner wall of the groove is fixedly connected with multiple groups of supporting springs, the top end of the supporting springs is fixedly connected to the bottom end of the pressing plate, the bottom end of the pressing plate is fixedly connected with multiple groups of plug posts, the top end of the disk is opened with a circular hole, and the bottom end of the plug post is aligned with the circular hole.

[0010] Preferably, a plurality of groups of trapezoidal blocks are fixedly connected to the top end of the extension plate, and the trapezoidal blocks are slidably connected inside the trapezoidal grooves, and the trapezoidal grooves are opened at the bottom end of the sliding plate.

[0011] Preferably, the sliding plate is provided with a plurality of groups of snap-in grooves, the inner walls of the snap-in grooves are fixedly connected with mounting blocks, the mounting blocks are triangular in design, the size of the snap-in grooves is adapted to the snap-in blocks, the top of the snap-in blocks are trapezoidal in design, the bottom end of the snap-in block is fixedly connected with a connecting spring, the bottom end of the connecting spring is fixedly connected to the inner wall of the rectangular groove, the snap-in block is slidably connected to the inside of the rectangular groove, and the rectangular groove is provided at the top end of the extension plate.

[0012] Preferably, a pulley is fixedly connected to the left extension plate, a through groove is provided on the left extension plate, and an anti-slip pad is fixedly connected to the right extension plate.

[0013] Preferably, a plurality of groups of support rods are inserted on the fixing rod, and the support rods are fixedly connected to the bottom end of the top platform plate.

[0014] Preferably, a plurality of groups of second protection bars are fixedly connected to the front and rear sides of the extension plate, and the second protection bars are perpendicular to the first protection bars.

[0015] Preferably, the cross section of the connecting rod is designed to be L-shaped, the connecting rod is fitted with the connecting column, and the side of the connecting rod is fitted with the inner wall of the mounting plate.

[0016] The present invention is beneficial in that:

[0017] 1. The present invention realizes the function of opening the two groups of extension plates on the top platform plate to both sides through the structural design of the unfolding mechanism, so as to expand the supporting area of ​​the top platform plate by the extension plates, thereby providing a larger activity space for maintenance personnel to facilitate maintenance, and solves the problem that the insulating scaffolding for power construction in the prior art is convenient for disassembly of the scaffolding to improve the efficiency of power maintenance, but after the scaffolding is installed, the space that can be provided by the top platform plate for maintenance personnel is relatively limited. For example, when repairing a telephone pole, due to the limited activity space, sometimes other personnel need to climb up the telephone pole and then cooperate with the maintenance personnel on the scaffolding to successfully complete the maintenance work, which is quite inconvenient.

[0018] 2. The present invention adopts the structural design of the support mechanism. When the extension plate is opened to both sides, the support plate can extend from the bottom end of the top platform plate, and after the extension plate is rotated to a horizontal position, the support plate contacts the bottom end of the extension plate, thereby providing support for the extension plate, so as to improve the bearing capacity of the extension plate after unfolding, and limit the maximum angle at which the extension plate can rotate, ensuring that the extension plate cannot continue to rotate after being horizontal.

[0019] 3. The present invention realizes the function of fixing the two sets of extended plates after unfolding through the structural design of the fixing mechanism, ensuring that after the extended plates are unfolded to both sides, the extended plates will not rotate due to minor shaking or upward pulling, so as to provide a stable foothold for maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the bottom end of the top platform plate of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the top platform plate of the present invention;

[0024] Figure 4 It is a schematic diagram of the connection structure of the mounting plate of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the support mechanism of the present invention;

[0026] Figure 6 It is a schematic diagram of the cross-sectional structure of the top platform plate of the present invention;

[0027] Figure 7 It is a schematic structural diagram of the extension plate of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the bottom end of the sliding plate of the present invention.

[0029] In the figure: 1, scaffolding body; 20, top platform plate; 21, rotating groove; 22, extension plate; 23, fixed gear; 24, movable rack; 25, mounting plate; 26, protrusion; 27, fixed plate; 28, latch; 29, connecting rod; 30, connecting column; 31, fixed rod; 32, fixing hole; 33, support plate; 34, sliding groove; 35, support rod; 36, pulling rod; 37, rotating disk; 38, rotating shaft; 39, disc; 40, supporting spring; 41, plug column; 42, pressing plate; 43, groove; 44, anti-skid pad; 45, through groove; 46, pulley; 47, trapezoidal block; 48, rectangular groove; 49, clamping block; 50, connecting spring; 51, mounting block; 52, clamping groove; 53, sliding plate; 54, trapezoidal groove; 55, first protective rod; 57, second protective rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] See also Figure 1 - Figure 8 As shown, a maintenance frame for power engineering construction includes a scaffolding body 1 and two groups of extension plates 22, the top of the scaffolding body 1 is fixedly connected with a top platform plate 20, the tops of the front and rear sides of the top platform plate 20 are fixedly connected with multiple groups of first protection rods 55, and the left and right sides of the top platform plate 20 are provided with unfolding mechanisms, which are used to unfold the extension plates 22 horizontally, so as to expand the activity space on the top platform plate 20, thereby facilitating maintenance, and the bottom end of the top platform plate 20 is provided with a supporting mechanism, which is used to provide support for the bottom end of the extension plate 22, and the top of the top platform plate 20 is provided with a fixing mechanism, which is used to fix the unfolded extension plate 22 to prevent the extension plate 22 from rotating again;

[0033] Furthermore, the unfolding mechanism includes two groups of rotating grooves 21, which are respectively opened on the left and right sides of the top platform plate 20, and the bottom end of the extension plate 22 is rotatably connected to the rotating grooves 21; it also includes two groups of fixed gears 23, which are respectively fixedly connected to the front and rear sides of the rotating shaft at the bottom end of the extension plate 22, and the bottom end of the fixed gear 23 is meshed with a movable rack 24, and the movable rack 24 is slidably mounted on the inner wall of the mounting plate 25 and the fixed plate 27. The plate 27 is fixedly connected to the mounting plate 25, and the mounting plate 25 is fixedly connected to the front and rear sides of the top platform plate 20. A protrusion 26 is fixedly connected to the middle part of the mounting plate 25, and a latch 28 is inserted into the protrusion 26. The bottom end of the latch 28 is inserted into a fixing hole 32. The fixing hole 32 is provided on the connecting rod 29 and the connecting column 30. One side of the connecting rod 29 and the connecting column 30 are fixedly connected to the movable rack 24. The connecting rod 29 and the connecting column 30 are slidably installed on the mounting plate 25;

[0034] Through the structural design of the unfolding mechanism, the function of opening the two groups of extension plates 22 on the top platform plate 20 to both sides is realized, so that the support area of ​​the top platform plate 20 can be expanded by the extension plates 22, thereby providing maintenance personnel with a larger activity space for maintenance. During work, when the two groups of extension plates 22 on the top platform plate 20 are not unfolded and are in a vertical state, the extension plates 22 can normally provide protection for the left and right sides of the top platform plate 20. When it is necessary to expand the activity space of the top platform plate 20, first pull out the pin 28 inserted in the fixing hole 32. At this time, the connecting rod 29 and the connecting column 30 can slide normally on the mounting plate 25, and then open the extension plates 22 to both sides. The bottom end part of the extension plate 22 will rotate in the rotating groove 21 until the extension plate 22 rotates to a horizontal position. Since the rotating shaft at the bottom end of the extension plate 22 is connected to the fixed gear 23, During the movement, the fixed gear 23 rotates synchronously and drives the movable rack 24 to slide on the mounting plate 25, wherein a fixing plate 27 is fixed on the mounting plate 25, one side of the movable rack 24 is in contact with the inner wall of the mounting plate 25, and the other side is in contact with the fixing plate 27. The mounting plate 25 and the fixing plate 27 cooperate to ensure that the movable rack 24 can properly mesh with the fixed gear 23 during the sliding process, and the protrusion 26 is located directly above the fixing hole 32. When the extension plate 22 is in a vertical state, the movable rack 24 will abut against the inner wall of the mounting plate 25, and the fixing holes 32 opened on the connecting rod 29 and the connecting column 30 will also be aligned. At this time, the pin 28 is inserted into the fixing hole 32 to fix the connecting rod 29 and the connecting column 30, thereby preventing the extension plate 22 from rotating. A plurality of sets of first protective rods 55 are fixed on the top platform plate 20, and the first protective rods 55 are used to provide protection for the front and rear sides of the top platform plate 20.

[0035] Further, the support mechanism includes a fixing rod 31, and the fixing rod 31 is provided with two groups. The fixing rod 31 on the left side is fixedly connected to the connecting rod 29, and the fixing rod 31 on the right side is fixedly connected to the connecting column 30. The bottom end of the fixing rod 31 is fixedly connected to three groups of supporting plates 33. The top end of the supporting plate 33 is slidably connected to the inside of the sliding groove 34. The sliding groove 34 is opened at the bottom end of the top platform plate 20. The top end of the supporting plate 33 is kept level with the inner wall of the bottom end of the rotating groove 21.

[0036] Through the structural design of the support mechanism, when the extension plate 22 is opened to both sides, the support plate 33 can extend from the bottom end of the top platform plate 20, and after the extension plate 22 is rotated to a horizontal position, it contacts the bottom end of the extension plate 22, thereby providing support for the extension plate 22, so as to improve the bearing capacity of the extension plate 22 after unfolding, and limit the maximum angle at which the extension plate 22 can rotate, ensuring that the extension plate 22 cannot continue to rotate after being horizontal. When working, when the fixed gear 23 drives the movable rack 24 to move, the movable rack 24 will slide on the mounting plate 25. The two sets of movable racks 24 respectively drive the connecting rods 29 and connecting columns 30 connected thereto to slide on the mounting plate 25, and the fixing rods 31 fixed on the bottom ends of the connecting rods 29 and connecting columns 30 will move away from each other. In the process of the two sets of fixing rods 31 moving away from each other, the support plate 33 will slide inside the sliding groove 34, and the support plate 33 will extend out from the sliding groove 34. When the extension plate 22 rotates to a horizontal position, the bottom end of the extension plate 22 will abut against the support plate 33, thereby preventing the extension plate 22 from continuing to rotate. At the same time, the support plate 33 will also provide support for the bottom end of the extension plate 22.

[0037] Further, the fixing mechanism includes two groups of pulling rods 36, the pulling rod 36 is rotatably connected to one side of the fixing rod 31, the side of the pulling rod 36 away from the fixing rod 31 is rotatably connected to the bottom end of the rotating disk 37, the top end of the rotating disk 37 is fixedly connected with a rotating shaft 38, the cross section of the rotating shaft 38 is cross-shaped, the rotating shaft 38 is rotatably connected to the inside of the top platform plate 20, the top end of the rotating shaft 38 is fixedly connected with a disk 39, the disk 39 is rotatably connected to the inside of the groove 43, the groove 43 is opened at the top of the top platform plate 20, the bottom end of the inner wall of the groove 43 is fixedly connected with multiple groups of supporting springs 40, the top end of the supporting spring 40 is fixedly connected to the bottom end of the pressing plate 42, the bottom end of the pressing plate 42 is fixedly connected with multiple groups of plug posts 41, the top end of the disk 39 is opened with a circular hole, and the bottom end of the plug post 41 is aligned with the circular hole;

[0038] The structural design of the fixing mechanism realizes the function of fixing the two groups of extended plates 22 after being unfolded, ensuring that after the extended plates 22 are unfolded to both sides, the extended plates 22 will not rotate due to minor shaking or upward pulling, so as to provide a stable foothold for maintenance personnel. During operation, when the fixed rods 31 move away from each other, since the two sides of the pulling rod 36 are respectively connected to the rotating disk 37 and the fixed rod 31 for rotation, the fixed rod 31 will pull the pulling rod 36, thereby rotating the rotating disk 37. The rotating disk 37 is hung on the bottom end of the top platform plate 20 through the rotating shaft 38, and the circular disk 39 will rotate synchronously with the rotating disk 37. A plurality of groups of round holes are provided on the circular disk 39, and the round holes are aligned one by one with the plug posts 41. When When the extension plate 22 rotates to a horizontal position, the feet of the maintenance personnel standing on the top platform plate 20 step on the pressing plate 42, so that the support spring 40 fixed at the bottom end of the pressing plate 42 is compressed, and the multiple groups of plug posts 41 fixed at the bottom end of the pressing plate 42 are inserted into the circular holes opened on the disc 39, thereby fixing the disc 39 to prevent the disc 39 from rotating, thereby ensuring that the rotating disc 37 does not rotate, and the position of the fixing rod 31 on the bottom end of the top platform plate 20 can be kept fixed, and the support plate 33 can also provide support for the bottom end of the extension plate 22 without being received in the sliding groove 34, wherein the bottom end of the pressing plate 42 adopts a hollow design and the side of the pressing plate 42 contacts the inner wall of the groove 43, and the plug posts 41 are distributed in a circle on the pressing plate 42.

[0039] Furthermore, the top of the extension plate 22 is fixedly connected with a plurality of sets of trapezoidal blocks 47, and the trapezoidal blocks 47 are slidably connected inside the trapezoidal grooves 54, and the trapezoidal grooves 54 are opened at the bottom end of the sliding plate 53;

[0040] During operation, a plurality of groups of trapezoidal blocks 47 are fixed on the top of the extension plate 22, and the trapezoidal grooves 54 opened at the bottom of the sliding plate 53 slide on the trapezoidal blocks 47. When the extension plate 22 is in a vertical state, the sliding plate 53 remains perpendicular to the extension plate 22, and tools and other sundries can be temporarily placed on the sliding plate 53, thereby reducing the space required for maintenance tools to be occupied, so as to facilitate maintenance personnel to move on the top platform plate 20.

[0041] Further, the sliding plate 53 is provided with a plurality of groups of snap-fit ​​grooves 52, the inner wall of the snap-fit ​​groove 52 is fixedly connected with a mounting block 51, the mounting block 51 is triangular in design, the size of the snap-fit ​​groove 52 is adapted to the snap-fit ​​block 49, the top of the snap-fit ​​block 49 is trapezoidal in design, the bottom end of the snap-fit ​​block 49 is fixedly connected with a connecting spring 50, the bottom end of the connecting spring 50 is fixedly connected to the inner wall of the rectangular groove 48, the snap-fit ​​block 49 is slidably connected inside the rectangular groove 48, and the rectangular groove 48 is provided at the top end of the extension plate 22;

[0042] When working, first pull the sliding plate 53 horizontally, and the sliding plate 53 slides on the extension plate 22. When the sliding plate 53 slides to the maximum distance, the clamping groove 52 opened on the sliding plate 53 will be aligned with the clamping block 49. The clamping block 49 is made of metal material, so that when the extension plate 22 is in a vertical state, the connecting spring 50 can be in a compressed state under the action of the gravity of the clamping block 49. When the extension plate 22 rotates to both sides and is in a horizontal state, the connecting spring 50 is no longer affected by the clamping block 49. The clamping block 49 is pressed against the clamping groove 52 to push the clamping block 49 to slide into the rectangular groove 48, thereby releasing the fixation.

[0043] Furthermore, a pulley 46 is fixedly connected to the left extension plate 22, a through slot 45 is provided on the left extension plate 22, and an anti-slip pad 44 is fixedly connected to the right extension plate 22;

[0044] During operation, a pulley 46 is fixed on the left extension plate 22, and a through slot 45 is opened. The tools and materials required during the maintenance process can be hoisted up through the through slot 45 and the pulley 46. An anti-slip pad 44 is fixed on the right extension plate 22 to increase the friction. When the maintenance personnel stand on the right extension plate 22, the goods can be placed on the left extension plate 22 or another maintenance personnel can stand on the left extension plate 22 to balance the gravity on the left and right sides of the top platform plate 20.

[0045] Furthermore, a plurality of support rods 35 are inserted on the fixing rod 31, and the support rods 35 are fixedly connected to the bottom end of the top platform plate 20;

[0046] During operation, the support rod 35 is fixed to the bottom end of the top platform plate 20 and passes through the fixing rod 31 to provide support for the sliding of the fixing rod 31 and ensure the stable movement of the fixing rod 31 .

[0047] Embodiment 2

[0048] See also Figure 1 - Figure 4 As shown, comparative example 1 is another embodiment of the present invention, the front and rear sides of the extension plate 22 are fixedly connected to multiple sets of second protection rods 57, and the second protection rods 57 are perpendicular to the first protection rods 55;

[0049] During operation, a plurality of sets of second protection rods 57 are fixed to the extension plate 22 . When the extension plate 22 is in a horizontal position, the second protection rods 57 can provide protection for the front and rear sides of the extension plate 22 .

[0050] The cross section of the connecting rod 29 is L-shaped, the connecting rod 29 is fitted with the connecting column 30, and the side of the connecting rod 29 is fitted with the inner wall of the mounting plate 25;

[0051] During operation, the cross section of the connecting rod 29 is L-shaped and fits with the connecting column 30. Both the connecting rod 29 and the connecting column 30 are kept in contact with the mounting plate 25 to limit the sliding of the connecting rod 29 and the connecting column 30 and ensure their stable sliding.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A maintenance frame for electric power engineering construction, comprising a scaffolding body (1) and two groups of extension plates (22), wherein the top of the scaffolding body (1) is fixedly connected to a top platform plate (20), and the tops of both front and rear sides of the top platform plate (20) are fixedly connected to multiple groups of first protection rods (55), characterized in that: The left and right sides of the top platform plate (20) are provided with unfolding mechanisms, and the unfolding mechanisms are used to unfold the extension plate (22) horizontally, so as to expand the activity space on the top platform plate (20) and facilitate maintenance. The bottom end of the top platform plate (20) is provided with a supporting mechanism, and the supporting mechanism is used to provide support for the bottom end of the extension plate (22). The top end of the top platform plate (20) is provided with a fixing mechanism, and the fixing mechanism is used to fix the unfolded extension plate (22) to prevent the extension plate (22) from rotating again.

2. The maintenance rack for electric power engineering construction according to claim 1, characterized in that: The unfolding mechanism comprises two groups of rotating grooves (21), the two groups of rotating grooves (21) are respectively arranged on the left and right sides of the top platform plate (20), and the bottom end of the extension plate (22) is rotatably connected to the rotating grooves (21); and also comprises two groups of fixed gears (23), the two groups of fixed gears (23) are respectively fixedly connected to the front and rear sides of the rotating shaft at the bottom end of the extension plate (22), the bottom end of the fixed gear (23) is meshed with a movable rack (24), the movable rack (24) is slidably mounted on the inner wall of the mounting plate (25) and the fixed plate (27), and the fixed plate (27) is fixedly connected On the mounting plate (25), the mounting plate (25) is fixedly connected to the front and rear sides of the top platform plate (20), and a protrusion (26) is fixedly connected to the middle part of the mounting plate (25), and a latch (28) is inserted on the protrusion (26), and the bottom end of the latch (28) is inserted in a fixing hole (32), and the fixing hole (32) is provided on the connecting rod (29) and the connecting column (30), and one side of the connecting rod (29) and the connecting column (30) is fixedly connected to the movable rack (24), and the connecting rod (29) and the connecting column (30) are slidably installed on the mounting plate (25).

3. The maintenance rack for electric power engineering construction according to claim 2, characterized in that: The support mechanism comprises a fixed rod (31), wherein the fixed rod (31) is provided with two groups, wherein the left fixed rod (31) is fixedly connected to the connecting rod (29), and the right fixed rod (31) is fixedly connected to the connecting column (30), and the bottom end of the fixed rod (31) is fixedly connected to three groups of support plates (33), and the top end of the support plate (33) is slidably connected to the inside of a sliding groove (34), and the sliding groove (34) is provided at the bottom end of the top platform plate (20), and the top end of the support plate (33) is kept level with the inner wall of the bottom end of the rotating groove (21).

4. The maintenance rack for electric power engineering construction according to claim 3, characterized in that: The fixing mechanism comprises two groups of pulling rods (36), wherein the pulling rods (36) are rotatably connected to one side of the fixing rod (31), and the side of the pulling rod (36) away from the fixing rod (31) is rotatably connected to the bottom end of a rotating disk (37), and the top end of the rotating disk (37) is fixedly connected to a rotating shaft (38), and the cross section of the rotating shaft (38) is cross-shaped. The rotating shaft (38) is rotatably connected to the inside of the top platform plate (20), and the top end of the rotating shaft (38) is fixedly connected to a circular The disk (39) is rotatably connected to the inside of a groove (43), the groove (43) is opened at the top of the top platform plate (20), the bottom end of the inner wall of the groove (43) is fixedly connected to multiple groups of support springs (40), the top end of the support spring (40) is fixedly connected to the bottom end of a pressing plate (42), the bottom end of the pressing plate (42) is fixedly connected to multiple groups of plug posts (41), the top end of the disk (39) is opened with a circular hole, and the bottom end of the plug post (41) is aligned with the circular hole.

5. The maintenance rack for electric power engineering construction according to claim 4, characterized in that: A plurality of groups of trapezoidal blocks (47) are fixedly connected to the top end of the extension plate (22), and the trapezoidal blocks (47) are slidably connected inside a trapezoidal groove (54), and the trapezoidal groove (54) is opened at the bottom end of the sliding plate (53).

6. The maintenance rack for electric power engineering construction according to claim 5, characterized in that: The sliding plate (53) is provided with a plurality of groups of clamping grooves (52), the inner wall of the clamping groove (52) is fixedly connected with a mounting block (51), the mounting block (51) is triangular in design, the size of the clamping groove (52) is adapted to the clamping block (49), the top of the clamping block (49) is trapezoidal in design, the bottom end of the clamping block (49) is fixedly connected with a connecting spring (50), the bottom end of the connecting spring (50) is fixedly connected to the inner wall of the rectangular groove (48), the clamping block (49) is slidably connected inside the rectangular groove (48), and the rectangular groove (48) is provided at the top end of the extension plate (22).

7. The maintenance rack for electric power engineering construction according to claim 6, characterized in that: A pulley (46) is fixedly connected to the left extension plate (22), a through slot (45) is provided on the left extension plate (22), and an anti-slip pad (44) is fixedly connected to the right extension plate (22).

8. The maintenance rack for electric power engineering construction according to claim 4, characterized in that: A plurality of groups of support rods (35) are inserted on the fixing rod (31), and the support rods (35) are fixedly connected to the bottom end of the top platform plate (20).

9. The maintenance rack for electric power engineering construction according to claim 7, characterized in that: A plurality of groups of second protection rods (57) are fixedly connected to the front and rear sides of the extension plate (22), and the second protection rods (57) are perpendicular to the first protection rods (55).

10. The maintenance rack for electric power engineering construction according to claim 3, characterized in that: The cross section of the connecting rod (29) is designed to be L-shaped, the connecting rod (29) is fitted with the connecting column (30), and the side edge of the connecting rod (29) is fitted with the inner wall of the mounting plate (25).

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