CN211115740U

CN211115740U - Folding ladder for water conservancy construction

Info

Publication number: CN211115740U
Application number: CN201920663400.9U
Authority: CN
Inventors: 骆泽旭; 张政委; 王家辉; 李科震; 迪丽拜尔·努尔夏提; 古丽迪娜·赛尔江
Original assignee: Xiuguanjin; Fujian Yilong Construction Engineering Co ltd
Current assignee: Xiuguanjin; Fujian Yilong Construction Engineering Co ltd
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2020-07-28
Anticipated expiration: 2029-05-10

Abstract

The utility model discloses a folding ladder that water conservancy construction used, comprising a base plate, the last fixed surface of bottom plate is connected with four support frames. Through setting up first ladder, the second ladder, spout and slider, the convenience is to carrying out the altitude mixture control between first ladder and the second ladder, when the use of increaseing needs, make first ladder rise through the slider, realize the adjustment of height, when not using, make first ladder retract to the spout of second ladder in through the slider, the device adopts the motor, cooperation between take-up pulley and the belt, the folding mode that the tradition was converted into has been realized, the folding mode that risees from top to bottom and shortens has been abandoned, time saving and labor saving, simultaneously with the help of the effect of electric hydraulic push rod, the angular adjustment to first ladder and second ladder has been realized, adopt the cooperation between gyro wheel and the handle, alone can promote the device, the cost of labor has been practiced thrift, whole device folding efficiency is higher, it is more convenient to use, compact structure, and reasonable design, therefore, the clothes hanger is strong in practicability.

Description

Folding ladder for water conservancy construction

Technical Field

The utility model relates to a building technical field specifically is a folding ladder that water conservancy construction used.

Background

A folding ladder is a hydraulic engineering article and assists workers to fall down on a construction site, and is provided with movable stairs. The folding ladder is opened when in use and folded after use, thereby being convenient for transfer. The folding ladder is required to be firm and firm for working, is widely applied to various civil engineering and finishing engineering, and is popular among more people due to convenience and dual-purpose property.

Folding ladder that uses in the existing market mostly uses and folds the mode into and folds, and such folding mode needs many people to cooperate just can accomplish foldingly, and folding back volume is still great, need carry with the help of the manual work simultaneously, wastes time and energy, and traditional folding ladder can't satisfy the free adjustment to the ladder direction in addition, and the nimble use of giving folding ladder brings very big inconvenience.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a folding ladder that water conservancy construction was used to solve the problem that above-mentioned background art provided.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: a folding ladder for water conservancy construction comprises a base plate, wherein four support frames are fixedly connected to the upper surface of the base plate, opposite surfaces of the two support frames are fixedly connected with the left end and the right end of a round shaft respectively, a second ladder is sleeved on the outer surface of the round shaft, the left side surface and the right side surface of the inner wall of the second ladder are fixedly connected with the left side surface and the right side surface of a second pedal and a third pedal respectively, a chute is formed in the left side surface of the second ladder, a sliding block is connected in the chute in a sliding manner, the left side surface of the sliding block is fixedly connected with the right side surface of a first ladder, the left side surface and the right side surface of the inner wall of the first ladder are fixedly connected with the left side surface and the right side surface of a first pedal respectively, the upper surface of the first ladder is fixedly connected with the lower surface of an object placing plate, the upper surface of the, the inner surface of the rotary table is fixedly connected with the outer surface of the rotary shaft, the outer surface of the rotary shaft is sleeved with a bearing, the bearing is clamped on the back surface of a first fixing plate, the lower surface of the first fixing plate is fixedly connected with the top end of an electric push rod, the bottom end of the electric push rod is fixedly connected with the upper surface of a supporting plate, the left end of a winding wheel is fixedly connected with an output shaft of a motor, the lower surface of the motor is fixedly connected with the upper surface of a supporting block, the lower surface of the supporting block is fixedly connected with the upper surface of the supporting plate, the right side surface of the supporting plate is fixedly connected with the left side surface of a second ladder, the back surface of the second ladder is fixedly connected with the front surface of a third fixing plate, the right side surface of the third fixing plate is movably connected with the left side surface of a fourth fixing plate through a first pin shaft, the bottom of the electric hydraulic push rod is fixedly connected with the upper surface of the fifth fixing plate, and the left side surface of the fifth fixing plate is movably connected with the right side surface of the second fixing plate through a second pin shaft.

Preferably, the lower surface of bottom plate is provided with the battery, the upper surface of bottom plate is provided with three switch, the output of battery passes through the wire electricity with the input of switch and is connected, and the output of three switch passes through the wire electricity with motor, electric putter and electric hydraulic push rod's input respectively and is connected.

Preferably, the lower surface of the bottom plate is fixedly connected with the upper surfaces of the rollers, the number of the rollers is four, and the positions of the four rollers are respectively located at the positions, close to the four corners, of the lower surface of the bottom plate.

Preferably, the upper surface of the supporting plate is clamped with a threaded cap, a threaded column is connected with the threaded cap in a threaded manner, the top end of the threaded column penetrates through the threaded cap to be in threaded connection with a threaded groove, and the threaded groove is formed in the outer surface of the winding wheel.

Preferably, the left side surface and the right side surface of the object placing plate are both fixedly connected with handrails, and the outer surfaces of the handrails are sleeved with anti-slip pads.

Preferably, the upper surface of the bottom plate is fixedly connected with the lower surface of the handle.

(III) advantageous effects

The utility model provides a folding ladder that water conservancy construction used possesses following beneficial effect:

(1) the folding ladder for water conservancy construction is convenient for adjusting the height between the first ladder and the second ladder by arranging the first ladder, the second ladder, the sliding groove and the sliding block, when the folding ladder is required to be heightened for use, the first ladder is lifted by the sliding block to realize height adjustment, when the folding ladder is not used, the first ladder is retracted into the sliding groove of the second ladder by the sliding block, the folding ladder is more convenient for use, the first pedal is arranged between the second pedal and the third pedal by arranging the first pedal, the second pedal and the third pedal, the first pedal is convenient to slide in the sliding groove, the height adjustment between the first ladder and the second ladder is realized, the motor works by arranging the motor, the winding wheel and the belt, the winding wheel is convenient to drive to rotate, the rising and the lowering of the first ladder are realized by virtue of the positive rotation and the reverse rotation of the motor, the model of the motor is 6RK200RGU-CF, and by arranging the threaded column, the threaded cap and the threaded groove, when the threaded post penetrates through the threaded cap to be in threaded connection with the threaded groove on the winding wheel, the winding wheel is conveniently clamped, the winding wheel stops rotating, the first ladder is further fixed at a specified height, when the threaded post is separated from the threaded groove, the winding wheel can be reversely rotated by means of the reverse rotation of the motor, the first ladder is made to descend, the first ladder and the second ladder can be pushed to be adjusted in angle by arranging the electric hydraulic push rod, the first pin shaft and the second pin shaft, the model of the electric hydraulic push rod is DYTZ450-/110, the support frame is arranged to conveniently support the second ladder by the support frame and the round shaft, the round shaft can conveniently adjust the front and back angles of the second ladder along with the electric hydraulic push rod, the device adopts the matching among the motor, the winding wheel and the belt, the traditional folding mode of folding is abandoned, the folding mode of vertical lifting and shortening is realized, time and labor are saved, and meanwhile, by means of the action of the electric hydraulic push rod, realized the angular adjustment to first ladder and second ladder, adopted the cooperation between gyro wheel and the handle, alone can promote the device, practiced thrift the cost of labor, whole device folding efficiency is higher, and it is more convenient to use, compact structure, reasonable in design, the practicality is strong.

(2) This folding ladder of water conservancy construction usefulness, put the thing board through the setting, handrail and slipmat, it makes things convenient for people to place a series of instruments that need use to put the thing board, the handrail makes things convenient for people to carry out the during operation to both sides, play certain support and protection to people, the slipmat can increase the frictional force between people's hand and the handle, prevent to slide, through setting up the carousel, the apparatus further comprises a rotating shaft, bearing and first fixed plate, the carousel can play certain cushioning effect to the belt, reduce the wearing and tearing of belt, the life of belt has been ensured to a certain extent, first fixed plate can play the fixed effect of support to the carousel.

(3) This folding ladder of water conservancy construction usefulness through setting up gyro wheel and handle, makes things convenient for people to promote the handle, through the more convenient removal the device of gyro wheel, through setting up battery and switch, the battery can make motor and electric hydraulic push rod work, and two switches make things convenient for people to control motor and electric hydraulic push rod's operating condition respectively.

Drawings

Fig. 1 is a schematic front view of a cross-sectional structure of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a schematic structural diagram of the present invention viewed from the right;

fig. 4 is a schematic structural view of the first pedal of the present invention.

In the figure: the device comprises a support block 1, a support plate 2, a motor 3, a winding wheel 4, a thread groove 5, a belt 6, a first fixing plate 7, a rotary table 8, a bearing 9, a rotating shaft 10, a storage plate 11, a first pedal 12, a non-slip mat 13, a handrail 14, a first ladder 15, a second ladder 16, a second ladder 17, a sliding chute 18, a second pedal 19, a support frame 20, a round shaft 21, a bottom plate 22, a roller 23, a storage battery 24, a thread cap 25, a thread column 26, a switch 27, a handle 28, a second fixing plate 29, a third fixing plate 30, a first pin 31, a fourth fixing plate 32, an electric hydraulic push rod 33, a fifth fixing plate 34, a second pin 35, a third pedal 36 and an electric push rod 37.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-4, the utility model provides a technical solution: a folding ladder for water conservancy construction comprises a bottom plate 22, wherein four support frames 20 are fixedly connected to the upper surface of the bottom plate 22, opposite surfaces of the two support frames 20 are fixedly connected with the left end and the right end of a round shaft 21 respectively, the upper surface of the bottom plate 22 is fixedly connected with the lower surface of a handle 28, the handle 28 is convenient for people to push, the device can be moved more conveniently through the rollers 23, a storage battery 24 is arranged on the lower surface of the bottom plate 22, three switches 27 are arranged on the upper surface of the bottom plate 22, the output end of the storage battery 24 is electrically connected with the input end of the switch 27 through a lead, the output ends of the three switches 27 are electrically connected with a motor 3, an electric push rod 37 and the input end of an electric hydraulic push rod 33 through leads respectively, the storage battery 24 and the switch 27 can enable the motor 3 and the electric hydraulic push rod 33 to work, the two switches 27 are respectively convenient for people to control the working, the lower surface of the bottom plate 22 is fixedly connected with the upper surfaces of the rollers 23, the number of the rollers 23 is four, the positions of the four rollers 23 are respectively located at the positions, close to four corners, of the lower surface of the bottom plate 22, the second ladder 16 is sleeved on the outer surface of the round shaft 21, the support frame 20 is arranged to conveniently support the second ladder 16 through the arrangement of the support frame 20 and the round shaft 21, the round shaft 21 can conveniently adjust the front and back angles of the second ladder 16 along with the electric hydraulic push rod 33, the left side surface and the right side surface of the inner wall of the second ladder 16 are respectively fixedly connected with the left side surface and the right side surface of the second pedal 12 and the third pedal 36, the left side surface of the second ladder 16 is provided with the sliding groove 17, the sliding block 18 is connected in the sliding groove 17, the left side surface of the sliding block 18 is fixedly connected with the right side surface of the first ladder 15, and through the arrangement of the first ladder 15, the, when the height of the first ladder 15 needs to be adjusted up for use, the first ladder 15 is lifted through the sliding block 18 to realize height adjustment, when the first ladder is not used, the first ladder 15 is retracted into the sliding groove 17 of the second ladder 16 through the sliding block 18, the use is more convenient, the left side surface and the right side surface of the inner wall of the first ladder 15 are respectively fixedly connected with the left side surface and the right side surface of the first pedal 19, the first pedal 19 is arranged between the second pedal 19 and the third pedal 36 through the first pedal 19, the first pedal 19 is arranged between the second pedal 19 and the third pedal 36, the first ladder 15 is convenient to slide in the sliding groove 17, the height adjustment between the first ladder 15 and the second ladder 16 is realized, the upper surface of the first ladder 15 is fixedly connected with the lower surface of the object placing plate 11, the upper surface of the object placing plate 11 is fixedly connected with one end of the belt 6, the left side surface and the right side surface of the object placing plate 11 are both fixedly connected with, The handrail 14 and the non-slip mat 13, the object placing plate 11 is convenient for people to place a series of tools to be used, the handrail 14 is convenient for people to support and protect people when working on two sides, the non-slip mat 13 can increase the friction force between the hands of people and the handle 28 and prevent sliding, the other end of the belt 6 bypasses the rotary table 8 and is fixedly connected with the outer surface of the winding wheel 4, the inner surface of the rotary table 8 is fixedly connected with the outer surface of the rotary shaft 10, the outer surface of the rotary shaft 10 is sleeved with the bearing 9, the bearing 9 is clamped on the back surface of the first fixing plate 7, through the arrangement of the rotary table 8, the rotary shaft 10, the bearing 9 and the first fixing plate 7, the rotary table 8 can play a certain buffering role on the belt 6 and reduce the abrasion of the belt 6, the service life of the belt 6 is guaranteed to a certain extent, the first fixing plate 7 can play a role in supporting and fixing on the rotary table 8, the lower surface of, the bottom end of the electric push rod 37 is fixedly connected with the upper surface of the supporting plate 2, the left end of the winding wheel 4 is fixedly connected with an output shaft of the motor 3, the lower surface of the motor 3 is fixedly connected with the upper surface of the supporting block 1, through the arrangement of the motor 3, the winding wheel 4 and the belt 6, the motor 3 works to conveniently drive the winding wheel 4 to rotate, the ascending and descending of the first ladder 15 are realized by virtue of the positive rotation and the reverse rotation of the motor 3, the model of the motor 3 is 6RK200RGU-CF, the lower surface of the supporting block 1 is fixedly connected with the upper surface of the supporting plate 2, the right side surface of the supporting plate 2 is fixedly connected with the left side surface of the second ladder 16, the upper surface of the supporting plate 2 is clamped with a threaded cap 25, a threaded column 26 is in threaded connection with the threaded cap 25, the top end of the threaded column 26 penetrates through the threaded cap 25 to be in threaded connection with, The thread cap 25 and the thread groove 5, when the thread post 26 passes through the thread cap 25 and is in threaded connection with the thread groove 5 on the winding wheel 4, the winding wheel 4 is conveniently clamped, the winding wheel 4 stops rotating, the first ladder 15 is further fixed at a designated height, when the thread post 26 is separated from the thread groove 5, the winding wheel 4 can be reversely rotated by means of the reverse rotation of the motor 3, the first ladder 15 descends, the back surface of the second ladder 16 is fixedly connected with the front surface of the third fixing plate 30, the right side surface of the third fixing plate 30 is movably connected with the left side surface of the fourth fixing plate 32 through the first pin shaft 31, the lower surface of the fourth fixing plate 32 is fixedly connected with the top end of the electric hydraulic push rod 33, the first pin shaft 31 and the second pin shaft 35 are arranged, the first ladder 15 and the second ladder 16 can be pushed to carry out angle adjustment, the model of the electric hydraulic push rod 33 is DYTZ450-/110, bottom and the upper surface fixed connection of fifth fixed plate 34 of electro-hydraulic push rod 33, the left surface of fifth fixed plate 34 passes through second round pin axle 35 swing joint with the right flank of second fixed plate 29, the device adopts motor 3, cooperation between take-up pulley 4 and the belt 6, the folding mode that the tradition was converted into has been abandoned, the folding mode that the rising shortens from top to bottom has been realized, time saving and labor saving, simultaneously with the help of the effect of electro-hydraulic push rod 33, the angular adjustment to first ladder 15 and second ladder 16 has been realized, adopt the cooperation between gyro wheel 23 and the handle 28, alone can promote the device, the cost of labor has been practiced thrift, whole device folding efficiency is higher, it is more convenient to use, compact structure, reasonable design, therefore, the clothes hanger is strong in practicability.

When in use, firstly pushing the handle 28, moving the device to a designated use position through the roller 23, starting the switch 27 to enable the motor 3 to work and rotate forwards, rotating the winding wheel 4 to drive the first ladder 15 to move upwards, when the first ladder 15 moves to a designated use height, pressing the switch 27 to enable the motor 3 to stop working, rotating the threaded column 26 to enable the threaded column 26 to penetrate through the threaded cap 25 to be in threaded connection with the threaded groove 5, fixing the winding wheel 4, thereby fixing the first ladder 15, enabling the starting switch 27 to enable the electric hydraulic push rod 33 to work, pushing the first ladder 15 and the second ladder 16 to carry out angle adjustment by virtue of the action of the first pin shaft 31 and the second pin shaft 35, when the angle is adjusted to a proper angle, pressing the switch 27 to enable the electric hydraulic push rod 33 to stop working, enabling people to start the switch 27 through the first pedal 19, the second pedal 19 and the third pedal 36, the electric hydraulic push rod 33 is driven to make the first ladder 15 and the second ladder 16 perpendicular to the bottom plate 22, the switch 27 is pressed to stop the electric hydraulic push rod 33, the threaded column 26 is rotated to separate the threaded column 26 from the threaded groove 5, the switch 27 is started to drive the motor 3 to rotate reversely, the winding wheel 4 rotates reversely, the first ladder 15 is driven to descend to enter the sliding groove 17 through the cooperation of the sliding block 18, the folding between the first ladder 15 and the second ladder 16 is realized, the switch 27 is pressed to stop the motor 3, and the device is moved to other positions through the roller 23.

To sum up, the folding ladder for water conservancy construction is convenient for adjusting the height between the first ladder 15 and the second ladder 16 by arranging the first ladder 15, the second ladder 16, the sliding groove 17 and the sliding block 18, when the folding ladder is required to be heightened for use, the first ladder 15 is lifted through the sliding block 18 to realize the adjustment of the height, when the folding ladder is not used, the first ladder 15 is retracted into the sliding groove 17 of the second ladder 16 through the sliding block 18, the folding ladder is more convenient for use, the first pedal 19 is arranged between the second pedal 19 and the third pedal 36 through arranging the first pedal 19, the second pedal 19 and the third pedal 36, the first ladder 15 conveniently slides into the sliding groove 17 to realize the adjustment of the height between the first ladder 15 and the second ladder 16, the motor 3 works by arranging the motor 3, the winding wheel 4 and the belt 6, the motor 3 conveniently drives the winding wheel 4 to rotate, and the first ladder 15 is lifted and lowered by the forward rotation and the reverse rotation of the motor 3, the model of the motor 3 is 6RK200RGU-CF, when the threaded column 26 passes through the threaded cap 25 to be in threaded connection with the threaded groove 5 on the winding wheel 4, the winding wheel 4 is conveniently clamped, the winding wheel 4 stops rotating, the first ladder 15 is further fixed at a specified height, when the threaded column 26 is separated from the threaded groove 5, the winding wheel 4 can reversely rotate by means of the reverse rotation of the motor 3 to enable the first ladder 15 to descend, the first ladder 15 and the second ladder 16 can be pushed to adjust the angle by arranging the electric hydraulic push rod 33, the first pin shaft 31 and the second pin shaft 35, the model of the electric hydraulic push rod 33 is DYTZ450-/110, the support frame 20 and the circular shaft 21 are arranged, the support frame 20 conveniently supports the second ladder 16, and the circular shaft 21 can conveniently enable the second ladder 16 to follow the electric hydraulic push rod 33 to adjust the front and back angles, the device adopts motor 3, the cooperation between take-up pulley 4 and the belt 6, the folding mode that the tradition was converted into has been abandoned, the folding mode that the rising shortened about having realized, time saving and labor saving, simultaneously with the help of electronic hydraulic push rod 33's effect, the angular adjustment to first ladder 15 and second ladder 16 has been realized, adopt the cooperation between gyro wheel 23 and the handle 28, alone can promote the device, the cost of labor has been practiced thrift, whole device folding efficiency is higher, it is more convenient to use, moreover, the steam generator is compact in structure, and reasonable design, therefore, the clothes hanger is strong in practicability.

Simultaneously, this folding ladder that water conservancy construction was used, put thing board 11 through the setting, handrail 14 and slipmat 13, it makes things convenient for people to place a series of instruments that need to use to put thing board 11, handrail 14 makes things convenient for people to carry out the during operation to both sides, play certain support and protection to people, slipmat 13 can increase the frictional force between people's hand and the handle 28, prevent to slide, through setting up carousel 8, pivot 10, bearing 9 and first fixed plate 7, carousel 8 can play certain cushioning effect to belt 6, reduce the wearing and tearing of belt 6, the life of belt 6 has been ensured to a certain extent, first fixed plate 7 can play the fixed effect of support to carousel 8.

Simultaneously, this folding ladder that water conservancy construction was used through setting up gyro wheel 23 and handle 28, makes things convenient for people to promote handle 28, through the more convenient removal the device of gyro wheel 23, through setting up battery 24 and switch 27, battery 24 can make motor 3 and electronic hydraulic push rod 33 work, and two switches 27 make things convenient for people to control the operating condition of motor 3 and electronic hydraulic push rod 33 respectively.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a folding ladder that water conservancy construction used, includes bottom plate (22), its characterized in that: the upper surface of the bottom plate (22) is fixedly connected with four support frames (20), opposite surfaces of the two support frames (20) are fixedly connected with the left end and the right end of the circular shaft (21) respectively, the outer surface of the circular shaft (21) is sleeved with a second ladder (16), the left side surface and the right side surface of the inner wall of the second ladder (16) are fixedly connected with the left side surface and the right side surface of a second pedal (12) and a third pedal (36) respectively, a sliding groove (17) is formed in the left side surface of the second ladder (16), a sliding block (18) is connected in the sliding groove (17), the left side surface of the sliding block (18) is fixedly connected with the right side surface of a first ladder (15), the left side surface and the right side surface of the inner wall of the first ladder (15) are fixedly connected with the left side surface and the right side surface of a first pedal (19) respectively, the upper surface of the first ladder (15) is fixedly connected with the lower surface of the object placing plate (11), the, the other end of the belt (6) bypasses a turntable (8) and is fixedly connected with the outer surface of a winding wheel (4), the inner surface of the turntable (8) is fixedly connected with the outer surface of a rotating shaft (10), the outer surface of the rotating shaft (10) is sleeved with a bearing (9), the bearing (9) is connected to the back of a first fixing plate (7) in a clamping manner, the lower surface of the first fixing plate (7) is fixedly connected with the top end of an electric push rod (37), the bottom end of the electric push rod (37) is fixedly connected with the upper surface of a supporting plate (2), the left end of the winding wheel (4) is fixedly connected with an output shaft of a motor (3), the lower surface of the motor (3) is fixedly connected with the upper surface of the supporting block (1), the lower surface of the supporting block (1) is fixedly connected with the upper surface of the supporting plate (2), the right side surface of the supporting plate (2) is fixedly connected with the left side surface of a, the back of second ladder (16) and the front fixed connection of third fixed plate (30), the right flank of third fixed plate (30) and the left surface of fourth fixed plate (32) are through first round pin axle (31) swing joint, the lower surface of fourth fixed plate (32) and the top fixed connection of electronic hydraulic ram (33), the bottom of electronic hydraulic ram (33) and the last fixed surface of fifth fixed plate (34) are connected, the left surface of fifth fixed plate (34) and the right flank of second fixed plate (29) are through second round pin axle (35) swing joint.

2. The folding ladder for water conservancy construction according to claim 1, characterized in that: the lower surface of bottom plate (22) is provided with battery (24), the upper surface of bottom plate (22) is provided with three switch (27), the output of battery (24) passes through the wire electricity with the input of switch (27) and is connected, and the output of three switch (27) passes through the wire electricity with the input of motor (3), electric putter (37) and electronic hydraulic push rod (33) respectively and is connected.

3. The folding ladder for water conservancy construction according to claim 1, characterized in that: the lower surface of the bottom plate (22) is fixedly connected with the upper surfaces of the rollers (23), the number of the rollers (23) is four, and the positions of the four rollers (23) are respectively located at the positions, close to four corners, of the lower surface of the bottom plate (22).

4. The folding ladder for water conservancy construction according to claim 1, characterized in that: the upper surface joint of backup pad (2) has screw cap (25), screw cap (25) female connection has screw thread post (26), screw cap (25) and thread groove (5) threaded connection are passed on the top of screw thread post (26), the surface at take-up pulley (4) is seted up in thread groove (5).

5. The folding ladder for water conservancy construction according to claim 1, characterized in that: the left side and the right side of the object placing plate (11) are both fixedly connected with handrails (14), and the outer surfaces of the handrails (14) are sleeved with anti-slip pads (13).

6. The folding ladder for water conservancy construction according to claim 1, characterized in that: the upper surface of the bottom plate (22) is fixedly connected with the lower surface of the handle (28).