Foldable maintenance platform for voltage stabilizer

Abstract

The utility model discloses a foldable maintenance platform for a voltage stabilizer, which relates to the technical field of voltage stabilizer maintenance and comprises a ladder stand, a pedal is rotatably connected to a position, close to the bottom, of the front side of the ladder stand, and protection mechanisms are rotatably connected to the left side and the right side of the pedal. The position, close to the upper side, of the rear side of the crawling ladder is fixedly connected with two lifting lugs in bilateral symmetry, the positions, close to the front end, of the left side and the right side of the pedal are rotationally connected with two supporting mechanisms distributed in bilateral symmetry, and the lower end of the crawling ladder is fixedly connected with two limiting plates distributed in bilateral symmetry. According to the foldable maintenance platform for the voltage stabilizer, the front enclosure, the first connecting rod, the second connecting rod and the third connecting rod are used for protecting three sides of the pedal through limitation of the inserting rods and the pedal, the foldable maintenance platform does not move under the condition that the pedal is fixed, the strength of the foldable maintenance platform is improved, and the protection capability is greatly enhanced; the safety protection device is used for providing more effective safety protection for a user.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage stabilizer maintenance, in particular to a foldable voltage stabilizer maintenance platform. Background Art

[0002] The pressurizer of a nuclear power plant is a vertical cylindrical high-pressure vessel, which is assembled and welded by an upper head, a lower head and three sections of a cylinder. The upper head is hemispherical, with a spray pipe, two safety valve pipes and a pressure relief valve pipe. The spray pipe is connected to a sprinkler, and a manhole is also provided on the upper head. Since the internal space of the pressurizer is not wide but very high, it is difficult for workers to enter it to install multiple pipes and sprinkler heads. In particular, the sprinkler is prone to blockage or damage when running at full power, and it is extremely difficult to repair the sprinkler in service. At present, there is no suitable tool to provide a platform for the installation and maintenance of the sprinkler.

[0003] Chinese patent document CN206519937U discloses a foldable maintenance platform for a voltage stabilizer, which is particularly suitable for voltage stabilizers in nuclear power plants and is used to install and repair sprinklers. The utility model includes a ladder, a pedal, a limit angle block, a connecting rod, and a handrail rod; the ladder is fixed on the voltage stabilizer; the pedal is connected to the ladder by a pin, and the pedal can rotate up and down around the pin; a limit angle block is set on the back of the lower end of the ladder, and when the pedal and the limit angle block are stuck, the angle between the pedal and the ladder is limited to 90°; the connecting rod, the handrail rod, the ladder, and the pedal form a typical four-bar linkage mechanism, and in the process of folding the ladder and the pedal, the handrail rod and the connecting rod will also fold up, so that the entire maintenance ladder is folded into a "one" shape. The utility model can be easily folded into an "one" shaped structure, so that it can be easily extended from a manhole with a limited diameter to the inside of the voltage stabilizer; after being unfolded inside the voltage stabilizer, a working platform is provided for convenient internal maintenance of the voltage stabilizer.

[0004] The existing technology has the following problems:

[0005] The protective handrail on the maintenance platform is in an active state, and the handrail is only provided on one side of the pedal, resulting in low strength of the handrail itself, which may cause bending deformation at the bottom connection. At the same time, there are no handrails on the other sides, resulting in reduced protection capabilities. Utility Model Content

[0006] The utility model provides a foldable maintenance platform for a voltage stabilizer to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A foldable maintenance platform for a voltage stabilizer comprises a ladder, a pedal is rotatably connected to the front side of the ladder near the bottom, protective mechanisms are rotatably connected to the left and right sides of the pedal, two left-right symmetrical lifting ears are fixedly connected to the rear side of the ladder near the upper side, two left-right symmetrically distributed supporting mechanisms are rotatably connected to the left and right sides of the pedal near the front end, and two left-right symmetrically distributed limiting plates are fixedly connected to the lower end of the ladder.

[0009] Preferably, the protection mechanism includes a front enclosure, which is rotatably connected to the front side of the ladder on both sides near the bottom, and is rotatably connected to two first connecting rods symmetrically distributed on both sides near the upper end of the front enclosure, the lower end of the first connecting rod is rotatably connected to the left and right sides of the pedal near the front side, and is rotatably connected to two second connecting rods symmetrically distributed on both sides near the upper end of the front enclosure, the lower end of the second connecting rod is rotatably connected to the left and right sides of the ladder near the lower end, and is rotatably connected to two third connecting rods symmetrically distributed on both sides of the front enclosure near the upper end, and two left and right symmetrical sliding grooves are provided on both sides of the ladder near the bottom, and the rear end of the third connecting rod is slidably connected to the inner side of the sliding groove.

[0010] Preferably, the inner sides of the left and right sides of the ladder are movably connected with four rectangularly distributed plug rods, and the plug rods are located at the upper and lower ends of the slide groove. The inner sides of the left and right sides of the ladder are movably connected with four rectangularly distributed springs, and the springs are located on the side where the plug rods are close to each other. The outer side of the plug rod is movably connected to the inner side of the rear end of the third connecting rod.

[0011] Preferably, two annular limiting grooves are provided on the inner sides of the rear ends of the two third connecting rods, and limiting plates are movably sleeved on the inner sides of the rear ends of the two third connecting rods, and the limiting plates are located on the side of the insertion rod away from the spring.

[0012] Preferably, the supporting mechanism includes a sleeve rod, the upper end of the sleeve rod is rotatably connected to the left and right sides of the ladder near the upper side, the inner side of the sleeve rod is movably sleeved with a sliding rod, the lower end of the sleeve rod is rotatably connected to the left and right sides of the pedal near the front side, the front end of the sleeve rod is fixedly connected with a plurality of annularly distributed clamps, and the sliding rod is located on the inner side of the clamps, the outer wall of the sleeve rod is threadedly connected with a limiting sleeve near the lower end, and the clamp is located on the inner side of the limiting sleeve.

[0013] Preferably, friction patterns are provided on the outer side of the limiting sleeve.

[0014] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0015] 1. The utility model provides a foldable maintenance platform for a voltage stabilizer, which adopts the cooperation of a pedal, a protective mechanism, a front fence, a first connecting rod, a second connecting rod, a slide groove, a third connecting rod and an insertion rod. Through the restriction of the insertion rod and the pedal, the front fence, the first connecting rod, the second connecting rod and the third connecting rod protect the three sides of the pedal. When the pedal is fixed, it does not move, its own strength is increased, and the protective ability is greatly enhanced, which is used to provide more effective safety protection for users.

[0016] 2. The utility model provides a foldable maintenance platform for a voltage stabilizer, which adopts the cooperation of a pedal, a supporting mechanism, a sleeve rod, a sliding rod, a clamping claw, a limiting sleeve and a limiting plate. The pedal is rotated to make it vertical, and then the limiting sleeve is rotated so that the clamping claw enters the inner side of the limiting sleeve to fix it. Since the total length of the supporting mechanism remains unchanged at this time, the pedal can no longer be rotated, which is convenient for storage and arrangement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of the utility model;

[0019] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of the middle A part;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the dressing part of the utility model;

[0021] Figure 5 It is a partial three-dimensional structural schematic diagram of the supporting mechanism of the utility model.

[0022] In the figure: 1. ladder; 2. pedal; 3. protective mechanism; 31. front guard; 32. first connecting rod; 33. second connecting rod; 34. slide groove; 35. third connecting rod; 36. limiting groove; 37. plug rod; 38. spring; 39. limit plate; 4. lifting ear; 5. supporting mechanism; 51. sleeve rod; 52. slide rod; 53. clamping claw; 54. limiting sleeve; 6. limiting plate. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1 , Figure 2As shown, a foldable maintenance platform for a voltage stabilizer comprises a ladder 1, a pedal 2 is rotatably connected to the front side of the ladder 1 near the bottom, a protective mechanism 3 is rotatably connected to the left and right sides of the pedal 2, two left-right symmetrical lifting ears 4 are fixedly connected to the rear side of the ladder 1 near the upper side, two left-right symmetrically distributed supporting mechanisms 5 are rotatably connected to the left and right sides of the pedal 2 near the front end, and two left-right symmetrically distributed limiting plates 6 are fixedly connected to the lower end of the ladder 1.

[0025] It should be noted that the limiting plate 6 is used to limit the rotation of the pedal 2 so that it is vertical to the ladder 1 at the lowest potential energy point. The lifting lug 4 can hang the maintenance platform on the top of the stabilizer with a small diameter and a large height, providing convenience for the installation and maintenance of the related components of the head of the stabilizer.

[0026] like Figure 2 , Figure 4 As shown, the protection mechanism 3 includes a front enclosure 31, and the left and right sides of the front enclosure 31 are rotatably connected to the front side of the ladder 1 near the bottom, and the left and right sides of the front enclosure 31 are rotatably connected to the positions near the upper end, and the lower ends of the first connecting rods 32 are rotatably connected to the left and right sides of the pedal 2 near the front side, and the left and right sides of the front enclosure 31 are rotatably connected to the positions near the upper end, and the two second connecting rods 33 are rotatably connected to the left and right sides of the ladder 1 near the lower end, and the left and right sides of the front enclosure 31 are rotatably connected to the positions near the upper end, and the two third connecting rods 35 are rotatably connected to the positions near the upper end, and two left and right symmetrical sliding grooves 34 are provided on the left and right sides of the ladder 1 near the bottom, and the rear ends of the third connecting rods 35 are slidably connected to the inner sides of the sliding grooves 34.

[0027] It should be noted that, by rotating the pedal 2, it drives the front fence 31, the first link 32, the second link 33 and the third link 35 to rotate, and the rear end of the third link 35 slides in the slide groove 34. When the pedal 2 is horizontal, the front fence 31 and the first link 32 are in a vertical state, and the third link 35 is in a horizontal state, which is used to provide protection for the three sides of the pedal 2. The second link 33 is used to enhance the strength of the left and right sides of the ladder 1.

[0028] like Figure 3 , Figure 4 As shown, four rectangularly distributed plug rods 37 are movably sleeved on the inner sides of the left and right sides of the ladder 1, and the plug rods 37 are located at the upper and lower ends of the slide groove 34. Four rectangularly distributed springs 38 are movably sleeved on the inner sides of the left and right sides of the ladder 1, and the springs 38 are located on the side where the plug rods 37 are close to each other. The outer side of the plug rod 37 is movably sleeved on the inner side of the rear end of the third connecting rod 35.

[0029] It should be noted that when the insertion rod 37 is movably sleeved on the inner side of the rear end of the third connecting rod 35, the rear end of the third connecting rod 35 is fixed.

[0030] like Figure 3 , Figure 4 As shown, two annular limiting grooves 36 are provided on the inner sides of the rear ends of the two third connecting rods 35 , and limiting plates 39 are movably sleeved on the inner sides of the rear ends of the two third connecting rods 35 , and the limiting plates 39 are located on the side of the insertion rod 37 away from the spring 38 .

[0031] It should be noted that the limiting groove 36 is L-shaped, so that when the limiting plate 39 is pushed toward the spring 38 and moved to the innermost side of the rear end of the third connecting rod 35, it can rotate, but the limiting plate 39 is fixed, so that the insertion rod 37 cannot be movably connected to the inner side of the rear end of the third connecting rod 35.

[0032] like Figure 2 , Figure 5 As shown, the support mechanism 5 includes a sleeve rod 51, the upper end of the sleeve rod 51 is rotatably connected to the left and right sides of the ladder 1 near the upper side, the inner side of the sleeve rod 51 is movably sleeved with a slide rod 52, the lower end of the sleeve rod 51 is rotatably connected to the left and right sides of the pedal 2 near the front side, the front end of the sleeve rod 51 is fixedly connected with a plurality of annularly distributed clamping claws 53, and the slide rod 52 is located on the inner side of the clamping claws 53, the outer wall of the sleeve rod 51 is threadedly connected with a limiting sleeve 54 near the lower end, and the clamping claw 53 is located on the inner side of the limiting sleeve 54.

[0033] It should be noted that the slide bar 52 can move freely on the sleeve bar 51 to control the total length of the sleeve bar 51 and the slide bar 52. When the pedal 2 is in a horizontal state, the total length of the sleeve bar 51 and the slide bar 52 reaches a maximum value. When the clamp 53 is located on the inner side of the limiting sleeve 54, the clamp 53 retracts and clamps the slide bar 52, so that the total length of the slide bar 52 and the sleeve bar 51 is fixed to prevent the pedal 2 from moving. The pedal 2 is rotated to a vertical state, and then the slide bar 52 is fixed, so that the total length of the slide bar 52 and the sleeve bar 51 cannot change. At this time, the pedal 2 cannot rotate.

[0034] like Figure 5 As shown, the outer side of the limiting sleeve 54 is provided with friction grooves.

[0035] It should be noted that the friction pattern is used to increase the friction between the hand and the limiting sleeve 54 , making it easier for the user to rotate the limiting sleeve 54 .

[0036] The working principle of the utility model is as follows: first, the pedal 2 is rotated to drive the front fence 31, the first link 32, the second link 33 and the third link 35 to rotate, and the rear end of the third link 35 slides in the slide groove 34. When the pedal 2 is horizontal, the front fence 31 and the first link 32 are in a vertical state, and the third link 35 is in a horizontal state, which is used to provide protection for three sides of the pedal 2. The second link 33 is used to enhance the strength of the left and right sides of the ladder 1. When the plug rod 37 is movably sleeved on the inner side of the rear end of the third link 35, the rear end of the third link 35 is fixed. Through the restriction of the plug rod 37 and the pedal 2, the front fence 31, the first link 32, the second link 33 and the third link 35 protect the three sides of the pedal 2. When the pedal 2 is fixed, it does not move, its own strength is increased, and the protection ability is greatly enhanced, which is used to protect the left and right sides of the ladder 1. The user can be provided with more effective safety protection. Finally, the slide bar 52 can move freely in the sleeve bar 51 to control the total length of the sleeve bar 51 and the slide bar 52. When the pedal 2 is in a horizontal state, the total length of the sleeve bar 51 and the slide bar 52 reaches a maximum value. When the clamping claw 53 is located on the inner side of the limiting sleeve 54, the clamping claw 53 is retracted and clamped to the slide bar 52, so that the total length of the slide bar 52 and the sleeve bar 51 is fixed to prevent the pedal 2 from moving. The pedal 2 is rotated to a vertical state, and then the slide bar 52 is fixed, so that the total length of the slide bar 52 and the sleeve bar 51 cannot change. At this time, the pedal 2 cannot be rotated. By rotating the pedal 2 to make it vertical, and then rotating the limiting sleeve 54, the clamping claw 53 enters the inner side of the limiting sleeve 54 to fix it. Since the total length of the support mechanism 5 remains unchanged at this time, the pedal 2 can no longer be rotated, which is convenient for storage and organization.

[0037] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A foldable maintenance platform for a voltage stabilizer, comprising a ladder (1), characterized in that: A pedal (2) is rotatably connected to the front side of the ladder (1) near the bottom, and a protective mechanism (3) is rotatably connected to the left and right sides of the pedal (2). Two left-right symmetrical hanging ears (4) are fixedly connected to the rear side of the ladder (1) near the upper side, and two left-right symmetrically distributed supporting mechanisms (5) are rotatably connected to the left and right sides of the pedal (2) near the front end, and two left-right symmetrically distributed limiting plates (6) are fixedly connected to the lower end of the ladder (1).

2. The foldable maintenance platform for a voltage stabilizer according to claim 1, characterized in that: The protection mechanism (3) comprises a front enclosure (31), wherein positions near the bottom on the left and right sides of the front enclosure (31) are rotatably connected to the front side of the ladder (1), positions near the upper end on the left and right sides of the front enclosure (31) are rotatably connected to two first connecting rods (32) symmetrically distributed on the left and right sides, the lower ends of the first connecting rods (32) are rotatably connected to positions near the front side on the left and right sides of the pedal (2), positions near the upper end on the left and right sides of the front enclosure (31) are rotatably connected to two second connecting rods (33) symmetrically distributed on the left and right sides, the lower ends of the second connecting rods (33) are rotatably connected to positions near the lower end on the left and right sides of the ladder (1), positions near the upper end on the left and right sides of the front enclosure (31) are rotatably connected to two third connecting rods (35) symmetrically distributed on the left and right sides, and two left and right symmetrical sliding grooves (34) are provided on the left and right sides of the ladder (1) near the bottom, and the rear ends of the third connecting rods (35) are slidably connected to the inner sides of the sliding grooves (34).

3. The foldable maintenance platform for voltage stabilizer according to claim 2 is characterized by: Four rectangularly distributed plug rods (37) are movably sleeved on the inner sides of the left and right sides of the ladder (1), and the plug rods (37) are located at the upper and lower ends of the slide groove (34). Four rectangularly distributed springs (38) are movably sleeved on the inner sides of the left and right sides of the ladder (1), and the springs (38) are located on the side where the plug rods (37) are close to each other. The outer side of the plug rod (37) is movably sleeved on the inner side of the rear end of the third connecting rod (35).

4. The foldable maintenance platform for a voltage stabilizer according to claim 3 is characterized in that: Two annular limiting grooves (36) are provided on the inner sides of the rear ends of the two third connecting rods (35), and a limiting plate (39) is movably sleeved on the inner sides of the rear ends of the two third connecting rods (35), and the limiting plate (39) is located on the side of the insertion rod (37) away from the spring (38).

5. The foldable maintenance platform for voltage stabilizer according to claim 1 is characterized by: The support mechanism (5) comprises a sleeve rod (51), the upper end of the sleeve rod (51) is rotatably connected to the left and right sides of the ladder (1) near the upper side, the inner side of the sleeve rod (51) is movably sleeved with a slide rod (52), the lower end of the sleeve rod (51) is rotatably connected to the left and right sides of the pedal (2) near the front side, the front end of the sleeve rod (51) is fixedly connected to a plurality of annularly distributed clamping claws (53), and the slide rod (52) is located on the inner side of the clamping claws (53), and the outer wall of the sleeve rod (51) is threadedly connected to a limiting sleeve (54) near the lower end, and the clamping claw (53) is located on the inner side of the limiting sleeve (54).

6. The foldable maintenance platform for voltage stabilizer according to claim 5, characterized in that: The outer side of the limiting sleeve (54) is provided with friction patterns.

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