CN112502604A

CN112502604A - Dam maintenance ladder

Info

Publication number: CN112502604A
Application number: CN202011292981.3A
Authority: CN
Inventors: 陈斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-03-16

Abstract

The invention discloses a dam maintenance ladder, which comprises ladder bars, wherein one sides, close to each other, of the ladder bars are movably connected with an installation shaft, the right side of the outer surface of the installation shaft is movably connected with a pedal, one sides, close to each other, of the ladder bars are arranged above the installation shaft and are provided with installation grooves, the pedal comprises a main board, one sides, far away from the installation shaft, of the front surface and the back surface of the main board are movably connected with adjusting rods, one ends, far away from the main board, of the adjusting rods are movably connected with telescopic rods, one ends, far away from the adjusting rods, of the telescopic rods are movably connected with the installation grooves, each adjusting rod comprises an installation bolt rod, one sides, close to each other, of the installation bolt rods are fixedly connected with electromagnetic reinforcing rods. Overall structure is simple, and the oneself resets, practices thrift the space that occupies, improves space utilization, reduces the striking possibility, protects self safety.

Description

Dam maintenance ladder

Technical Field

The invention relates to the technical field of water conservancy, in particular to a dam maintenance ladder.

Background

Along with the rapid development of economy and urban infrastructure in China, the water conservancy overhaul crawling ladder is more and more used in industry, but the water conservancy overhaul crawling ladder used in modern industry only focuses on the waterproof, sun-proof and other work functions of materials used by the water conservancy overhaul crawling ladder, and does not focus on the functions of convenience, safety and the like during working.

According to the Chinese patent CN107368021A, when equipment starts to work, the equipment can generate vibration, the top of the base is connected with the bottom of the supporting frame through the shock absorber, the vibration generated by the equipment can be reduced through the shock absorber, the base can be fixed, the stability of the base is ensured, and the safety of personnel working is ensured; when the load of the fixed station exceeds a set value or the equipment has a problem, the overload sound control alarm can transmit a signal to the PLC, the PLC can automatically control the overload sound control alarm to give an alarm, and the emergency stop button can be pressed to stop all equipment to work, so that the safety of personnel is guaranteed. This equipment is in the use, and the surperficial rivers flow, and the debris that drive the aquatic easily bump the ladder, destroy inside electronic components, cause equipment to damage to the continuous flow of rivers causes inside temperature to run off fast, causes the equipment temperature low, and the equipment material is embrittled easily, leads to equipment to use the birthday face short-lived.

In conclusion, in the use process of the existing dam maintenance ladder, surface water flow flows to easily drive sundries in water to impact the ladder and damage internal electronic components, so that equipment is damaged, the continuous flow of the water flow causes the internal temperature to quickly run off, the temperature of the equipment is low, the material of the equipment is easy to embrittle, and the service life of the equipment is short.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a dam maintenance ladder, which can solve the problems that in the use process of the existing dam maintenance ladder, surface water flow flows to easily drive sundries in water to impact the ladder to damage internal electronic components, so that equipment is damaged, and the internal temperature is quickly lost due to the continuous flow of the water flow, so that the equipment temperature is low, the equipment material is easy to embrittle, and the service life of the equipment is short.

In order to achieve the purpose, the invention is realized by the following technical scheme: a dam maintenance ladder comprises ladder bars, wherein one sides, close to each other, of the ladder bars are movably connected with mounting shafts, the right sides of the outer surfaces of the mounting shafts are movably connected with pedals, and mounting grooves are formed in one sides, close to each other, of the ladder bars and above the mounting shafts;

the footboard includes the mainboard, the mainboard openly just keeps away from one side swing joint who installs the axle with the back and has the regulation pole, the one end swing joint that the mainboard was kept away from to the regulation pole has the telescopic link, the one end and the mounting groove swing joint of regulation pole are kept away from to the telescopic link. Overall structure is simple, and the oneself resets, practices thrift the space that occupies, improves space utilization, reduces the striking possibility, protects self safety.

Preferably, the ladder rod includes a rod section of thick bamboo, one side fixedly connected with resilient means that rod section of thick bamboo inner chamber internal surface is close to the installation axle, one side swing joint that resilient means kept away from the installation axle has buffering oval ball, one side that the installation axle was kept away from to rod section of thick bamboo surface just is located the position fixedly connected with anticollision institution of buffering oval ball, the position fixedly connected with water conservancy diversion impeller that the surface openly is located resilient means of rod section of thick bamboo surface. The impact shock is absorbed by the buffering elliptical ball, so that the impact noise is avoided, and the environmental safety is protected.

Preferably, one side of the buffering elliptical ball, which is far away from the rebounding mechanism, is movably connected with the anti-collision mechanism, the guide vane wheel penetrates through the rod barrel and extends to the inner cavity of the rod barrel, and the inner surface of the guide vane wheel is positioned on one side of the inner cavity of the rod barrel and is movably connected with the rebounding mechanism.

Preferably, the rebounding mechanism comprises a power generation ball body, the top and the bottom of the outer surface of the power generation ball body are both movably connected with electromagnetic lamination sheets, and the right side of each electromagnetic lamination sheet is fixedly connected with an arc-shaped steel sheet far away from the position of the power generation ball body. Carry out the self energy supply through the impact, carry out the magnetic force of oneself and reinforce, strengthen the resilience dynamics of equipment, avoid equipment to use for a long time and produce weak deformation, the life of extension equipment improves protection quality.

Preferably, one side of the arc-shaped steel sheet, which is far away from the electromagnetic lamination, is fixedly connected with the rod cylinder, and one side of the power generation ball, which is far away from the arc-shaped steel sheet, is movably connected with the buffering elliptical ball.

Preferably, anticollision institution includes the mounting groove, the equal fixedly connected with spout lamination in mounting groove inner chamber top and bottom, one side fixedly connected with anticollision ball of mounting groove is kept away from to the spout lamination, anticollision ball internal surface top and bottom intermediate position fixedly connected with rhombus support, rhombus support inner chamber internal surface fixedly connected with dispersion spheroid. The impact force is dispersed by utilizing the inner ball body, so that the stress concentration borne by equipment is avoided, and the damage caused by impact is reduced; conduct the dynamics through the rhombus is concentrated, guarantees that the inner member atress is concentrated, ensures that inside self magnetic force strengthens more accurate high-efficient, ensures the effect that equipment kick-backed.

Preferably, one side of the outer surface of the anti-collision ball, which is close to the rebound mechanism, is movably connected with the buffering elliptical ball, and the outer surface of the anti-collision ball is slidably connected with the mounting groove.

Preferably, the water conservancy diversion impeller includes sealed slotted hole, the equal fixedly connected with electric property axis in sealed slotted hole inner chamber top and bottom, electric property axis surface intermediate position fixedly connected with energy supply lamination, electric property axis surface is located energy supply lamination top and the equal fixedly connected with of below is sealed fills up, energy supply lamination surface swing joint has the arc contact piece, one side fixedly connected with wheel leaf of energy supply lamination is kept away from to the arc contact piece. The water flow is guided, the water flow direction is changed, the fluctuation of the water flow is reduced, the parts on the water surface are prevented from being infected with water drops, and the equipment is protected; utilize rivers impact force to carry out the self-rotation to produce the electric energy through the mutual friction of component and carry out the whole energy supply of equipment, and the self-heating carries out the heat preservation of certain degree to equipment inside, avoids interior equipment because of low temperature embrittlement, protection equipment safe in utilization.

Preferably, the bottom and the bottom of the arc-shaped contact piece are in sliding connection with the sealing gasket, the bottom and the bottom of the vane are in sliding connection with the sealing gasket, and the outer surface of the vane is in sliding connection with the sealing groove hole.

Preferably, the mainboard includes the plate body, built-in groove has been seted up to one side that the ladder pole was kept away from to the plate body, one side swing joint that ladder pole was kept away from to built-in groove has the striking toggle button, the striking toggle button is kept away from one side of ladder pole and is run through the plate body and extend to the plate body outer wall. The magnetic force generated by the equipment is used for repelling, so that the surface impact bearing capacity is enhanced, and the use quality of the pedal is protected; utilize striking toggle to carry out water conservancy diversion and repulsion, avoid footboard surface to produce mar or wearing and tearing, stress concentration when preventing to use, protection equipment safety and personnel safety in utilization.

Preferably, the adjusting rod comprises an installation bolt rod, one side, close to each other, of the installation bolt rod is fixedly connected with an electromagnetic strengthening rod, and one end, far away from the installation bolt rod, of the electromagnetic strengthening rod is fixedly connected with an elastic protection rod. Utilize magnetic force to adsorb the dynamics of bearing of reinforceing member self to trample the buffering protection to the personnel, reduce vibrations influence, promote the comfort level of using.

Preferably, the end of the installation bolt rod, which is far away from the installation groove, is rotatably connected with the main board, and the end of the installation bolt rod, which is close to the installation groove, is rotatably connected with the telescopic rod.

The invention provides a dam maintenance ladder. The method has the following beneficial effects:

(1) this dam maintenance ladder through overall structure is simple, and the oneself resets, practices thrift the space that occupies, improves space utilization, reduces the striking possibility, protection self safety.

(2) This dam maintenance ladder produces the absorption through buffering elliptical ball to the impact vibrations, avoids producing the striking noise, environmental protection safety.

(3) This dam maintenance ladder carries out the self energy supply through the impact, carries out the magnetic force of oneself and strengthens, strengthens the resilience dynamics of equipment, avoids equipment to use for a long time and produces weak deformation, prolongs the life of equipment, improves protection quality.

(4) This dam maintenance ladder disperses the impact strength by utilizing the inside spheroid, avoids the stress concentration that equipment received, reduces the harm that the striking produced.

(5) This dam maintenance ladder is concentrated the dynamics through the rhombus and is conducted, guarantees that the internals atress is concentrated, ensures that inside oneself magnetic force strengthens more accurate high-efficient, ensures the effect of equipment resilience.

(6) This dam maintenance ladder through carrying out the water conservancy diversion to rivers, changes the rivers direction, reduces rivers fluctuation, avoids the part of the surface of water to be infected with the water droplet, protects equipment.

(7) This dam maintenance ladder carries out the self-rotation through utilizing rivers impact force to mutual friction through the component produces the electric energy and carries out the whole energy supply of equipment, and the self-heating carries out the heat preservation of certain degree to equipment inside, avoids the internal plant because of low temperature embrittlement, protective apparatus safety in utilization.

(8) The dam maintenance ladder is repelled by magnetic force generated by equipment, so that the surface impact bearing capacity is strengthened, and the service quality of the pedal is protected.

(9) This dam maintenance ladder carries out water conservancy diversion and rejection through utilizing the striking knob of being tied, avoids footboard surface to produce mar or wearing and tearing, stress concentration when preventing to use, protective apparatus safety and personnel safe in utilization.

(10) This dam maintenance ladder strengthens member self through utilizing magnetic force to adsorb and bears the dynamics to trample the buffering protection to the personnel, reduce vibrations influence, promote the comfort level of use.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the pedal structure of the present invention;

FIG. 3 is a schematic view of the ladder bar structure of the present invention;

FIG. 4 is a schematic structural view of a rebound mechanism in the present invention;

FIG. 5 is a schematic structural view of a crash prevention mechanism according to the present invention;

fig. 6 is a schematic structural view of a guide vane wheel according to the present invention.

In the figure: 1-ladder rod, 11-rod cylinder, 12-rebound mechanism, 121-power generation ball, 122-electromagnetic lamination, 123-arc steel sheet, 13-buffer elliptical ball, 14-collision prevention mechanism, 141-installation groove, 142-chute lamination, 143-collision prevention ball, 144-diamond bracket, 145-dispersion ball, 15-guide impeller, 151-seal groove hole, 152-electric center shaft, 153-energy supply lamination, 154-seal gasket, 155-arc contact piece, 156-wheel blade, 2-installation shaft, 3-pedal, 31-main board, 311-plate body, 312-built-in groove, 313-impact bolt, 32-adjustment rod, 321-installation bolt, 322-electromagnetic reinforcement rod, 323-elastic protection rod, 33-telescopic rod, telescopic rod, 4-mounting groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The first embodiment is as follows:

referring to fig. 1-2, the present invention provides a technical solution: a dam maintenance ladder comprises ladder bars 1, wherein one sides, close to each other, of the ladder bars 1 are movably connected with mounting shafts 2, the right sides of the outer surfaces of the mounting shafts 2 are movably connected with pedals 3, and mounting grooves 4 are formed in one sides, close to each other, of the ladder bars 1 and above the mounting shafts 2;

footboard 3 includes mainboard 31, and mainboard 31 is just kept away from one side swing joint who installs axle 2 with the back and has adjusted pole 32, adjusts the one end swing joint that mainboard 31 was kept away from to pole 32 and has telescopic link 33, and telescopic link 33 keeps away from the one end and the mounting groove 4 swing joint of adjusting pole 32.

Mainboard 31 includes plate body 311, and built-in groove 312 has been seted up to one side that ladder bar 1 was kept away from to plate body 311, and one side swing joint that ladder bar 1 was kept away from to built-in groove 312 has striking toggle button 313, and striking toggle button 313 keeps away from one side of ladder bar 1 and runs through plate body 311 and extend to plate body 311 outer wall.

The adjusting rod 32 comprises a mounting bolt 321, electromagnetic reinforcing rods 322 are fixedly connected to the sides, close to each other, of the mounting bolt 321, and elastic protection rods 323 are fixedly connected to the ends, far away from the mounting bolt 321, of the electromagnetic reinforcing rods 322.

The end of the mounting bolt 321 far away from the mounting groove 4 is rotatably connected with the main board 31, and the end of the mounting bolt 321 near the mounting groove 4 is rotatably connected with the telescopic rod 33.

When the electromagnetic reinforcing rod 32 is used, the electromagnetic reinforcing rod 322 generates current flow through external power supply, an electromagnetic field is generated by the electromagnetic reinforcing rod 322, the mutual magnetic force is adsorbed, the bearing capacity of the adjusting rod 32 is reinforced, the self bearing force of the rod is reinforced through the magnetic force adsorption, the impact on the treading of a person is buffered and protected, the vibration influence is reduced, the use comfort level is improved, the use safety of the mainboard 31 is ensured, the electromagnetic field generated by the electromagnetic reinforcing rod 322 generates magnetic repulsion on the impact bolt button 313, the impact bolt button 313 extends out of the plate body 311, the pedal 3 is effectively protected, the impact bolt button is utilized for conducting flow guidance and repulsion, the scratch or abrasion on the surface of the pedal is avoided, the stress concentration during the use is prevented, the equipment safety and the use safety of the person are protected, and the angle adjustment is carried out on the pedal 3 through the movement, the opening degree of the pedal 3 is controlled.

Example two:

referring to fig. 1-5, on the basis of the first embodiment, the present invention provides a technical solution: ladder bar 1 includes a pole section of

thick bamboo

11, and 11 inner chamber internal surfaces of pole section of thick bamboo are close to one side fixedly connected with resilient mounting mechanism 12 of installation axle 2, and one side swing joint that resilient mounting mechanism 12 kept away from installation axle 2 has buffering oval ball 13, and 11 surfaces of pole section of thick bamboo keep away from installation axle 2 one side and lie in buffering oval ball 13's position fixedly connected with

anticollision institution

14, and 11 surfaces of pole section of thick bamboo openly lie in resilient mounting mechanism 12's position fixedly connected with water conservancy diversion impeller 15.

One side of the buffering elliptical ball 13, which is far away from the rebounding mechanism 12, is movably connected with the anti-collision mechanism 14, the guide vane wheel 15 penetrates through the rod barrel 11 and extends to the inner cavity of the rod barrel 11, and one side, which is located in the inner cavity of the rod barrel 11, of the inner surface of the guide vane wheel 15 is movably connected with the rebounding mechanism 12.

The rebounding mechanism 12 comprises a power generation sphere 121, electromagnetic laminations 122 are movably connected to the top and the bottom of the outer surface of the power generation sphere 121, and an arc-shaped steel sheet 123 is fixedly connected to the right side of the electromagnetic laminations 122 and far away from the position of the power generation sphere 121.

One side of the arc-shaped steel sheet 123 far away from the electromagnetic lamination 122 is fixedly connected with the rod barrel 11, and one side of the power generation sphere 121 far away from the arc-shaped steel sheet 123 is movably connected with the buffering elliptical sphere 13.

The anti-collision mechanism 14 comprises a mounting groove 141, chute laminations 142 are fixedly connected to the top and the bottom of an inner cavity of the mounting groove 141, an anti-collision ball 143 is fixedly connected to one side of the chute laminations 142 away from the mounting groove 141, a rhombic support 144 is fixedly connected to the middle position of the top and the bottom of the inner surface of the anti-collision ball 143, and a dispersion ball 145 is fixedly connected to the inner surface of the inner cavity of the rhombic support 144.

One side of the outer surface of the anti-collision ball 143, which is close to the rebound mechanism 12, is movably connected with the buffering elliptical ball 13, and the outer surface of the anti-collision ball 143 is slidably connected with the mounting groove 141.

The guide vane wheel 15 comprises a sealing slot 151, an electrical center shaft 152 is fixedly connected to the top and the bottom of an inner cavity of the sealing slot 151, an energy supply lamination sheet 153 is fixedly connected to the middle position of the outer surface of the electrical center shaft 152, sealing gaskets 154 are fixedly connected to the upper portion and the lower portion of the outer surface of the electrical center shaft 152, an arc-shaped contact sheet 155 is movably connected to the outer surface of the energy supply lamination sheet 153, and a vane 156 is fixedly connected to one side, far away from the energy supply lamination sheet 153.

The bottom and bottom of the arc-shaped contact piece 155 are slidably connected with the sealing pad 154, the bottom and bottom of the vane 156 are slidably connected with the sealing pad 154, and the outer surface of the vane 156 is slidably connected with the sealing groove hole 151.

When the device is used, water flows continuously to drive the wheel blades 156 to rotate, the wheel blades 156 are used for guiding the water flow, the direction of the water flow is changed, the fluctuation of the water flow is reduced, parts on the water surface are prevented from being infected with water drops, the device is protected, the wheel blades 156 drive the arc-shaped contact pieces 155 to rotate, the energy supply lamination 153 is used for friction power generation, other devices are powered, the self heat generation is facilitated, the interior of the device is kept warm to a certain degree, the internal device is prevented from being embrittled due to low temperature, and the use safety of the device is protected;

the electromagnetic reinforcing rod 322 generates current flow, an electromagnetic field is generated by the electromagnetic reinforcing rod 322, magnetic force between the electromagnetic reinforcing rods 322 is absorbed, the bearing capacity of the adjusting rod 32 is reinforced, the rod is reinforced by the magnetic absorption, buffering protection is performed on treading of a person, vibration influence is reduced, use comfort is improved, use safety of the mainboard 31 is guaranteed, magnetic repulsion is generated on the impact bolt button 313 through the electromagnetic field generated by the electromagnetic reinforcing rod 322, the impact bolt button 313 extends out of the plate body 311, the pedal 3 is effectively protected, flow guiding and repulsion are performed by the impact bolt button, scratches or abrasion on the surface of the pedal are avoided, stress concentration during use is prevented, equipment safety and use safety of the person are protected, the pedal 3 is subjected to angle adjustment through the telescopic rod 33 moving along the mounting groove 4, and the opening degree of the pedal 3 is controlled;

rivers drive aquatic debris and strike equipment, debris and crashproof ball 143 at first contact, make dispersion spheroid 145145 disperse the impact force, avoid equipment self impaired seriously, and excessively transmit the impact force to buffering elliptical ball 13 through diamond-shaped support 144, through the absorption of the vibration noise of buffering elliptical ball 13 to its production, make it transmit the impact force to electricity generation spheroid 121, make electricity generation spheroid 121 surface and electromagnetism lamination 122 produce position change each other, and change arc steel sheet 123 self shape, electricity generation spheroid 121 self produces the electric energy, and transmit to electromagnetism lamination 122, make electromagnetism lamination 122 self magnetic force reinforcing, strengthen arc steel sheet 123 resilience force, cause whole resilient mechanism 12 to effectively reset, be convenient for carry out follow-up protection.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a dam maintenance ladder, includes ladder pole (1), its characterized in that: an installation shaft (2) is movably connected to one side, close to each other, of the ladder bars (1), a pedal (3) is movably connected to the right side of the outer surface of the installation shaft (2), and an installation groove (4) is formed in one side, close to each other, of the ladder bars (1) and located above the installation shaft (2);

footboard (3) include mainboard (31), mainboard (31) openly and the back just keep away from one side swing joint of installation axle (2) and adjust pole (32), the one end swing joint that mainboard (31) were kept away from in regulation pole (32) has telescopic link (33), the one end and mounting groove (4) swing joint of adjusting pole (32) are kept away from in telescopic link (33).

2. A dam maintenance ladder as claimed in claim 1, wherein: ladder bar (1) includes a pole section of thick bamboo (11), one side fixedly connected with resilient means (12) that pole section of thick bamboo (11) inner chamber internal surface is close to installation axle (2), one side swing joint that mounting axle (2) were kept away from in resilient means (12) has buffering elliptical ball (13), one side of installation axle (2) is kept away from to pole section of thick bamboo (11) surface and is located position fixedly connected with anticollision institution (14) of buffering elliptical ball (13), the position fixedly connected with water conservancy diversion impeller (15) that pole section of thick bamboo (11) surface openly is located resilient means (12).

3. A dam maintenance ladder as claimed in claim 2, wherein: buffering elliptical ball (13) keep away from one side and crashproof mechanism (14) swing joint of resilience mechanism (12), guide vane wheel (15) run through a pole section of thick bamboo (11) and extend to pole section of thick bamboo (11) inner chamber, guide vane wheel (15) internal surface is located one side and resilience mechanism (12) swing joint of pole section of thick bamboo (11) inner chamber.

4. A dam maintenance ladder as claimed in claim 2, wherein: the rebounding mechanism (12) comprises a power generation ball body (121), the top and the bottom of the outer surface of the power generation ball body (121) are both movably connected with electromagnetic laminations (122), and the right side of each electromagnetic lamination (122) is far away from an arc steel sheet (123) fixedly connected with the position of the power generation ball body (121).

5. The dam maintenance ladder of claim 4, wherein: one side, far away from the electromagnetic lamination (122), of the arc-shaped steel sheet (123) is fixedly connected with the rod barrel (11), and one side, far away from the arc-shaped steel sheet (123), of the power generation ball body (121) is movably connected with the buffering elliptical ball (13).

6. A dam maintenance ladder as claimed in claim 2, wherein: anticollision institution (14) include mounting groove (141), equal fixedly connected with spout lamination (142) in mounting groove (141) inner chamber top and bottom, one side fixedly connected with anticollision ball (143) of mounting groove (141) are kept away from in spout lamination (142), anticollision ball (143) internal surface top and bottom intermediate position fixedly connected with rhombus support (144), rhombus support (144) inner chamber internal surface fixedly connected with dispersion spheroid (145).

7. The dam maintenance ladder of claim 6, wherein: one side of the outer surface of the anti-collision ball (143), which is close to the rebound mechanism (12), is movably connected with the buffering elliptical ball (13), and the outer surface of the anti-collision ball (143) is in sliding connection with the mounting groove (141).

8. A dam maintenance ladder as claimed in claim 2, wherein: guide vane wheel (15) are including sealed slotted hole (151), sealed slotted hole (151) inner chamber top and the equal fixedly connected with electric property axis (152) in bottom, electric property axis (152) surface intermediate position fixedly connected with energy supply lamination (153), electric property axis (152) surface is located energy supply lamination (153) top and the equal fixedly connected with sealed pad (154) in below, energy supply lamination (153) surface swing joint has arc contact piece (155), one side fixedly connected with wheel leaf (156) of energy supply lamination (153) are kept away from in arc contact piece (155).

9. A dam maintenance ladder as claimed in claim 8, wherein: the bottom and the bottom of the arc-shaped contact piece (155) are in sliding connection with the sealing gasket (154), the bottom and the bottom of the vane (156) are in sliding connection with the sealing gasket (154), and the outer surface of the vane (156) is in sliding connection with the sealing groove hole (151).

10. A dam maintenance ladder as claimed in claim 1, wherein: mainboard (31) is including plate body (311), built-in groove (312) have been seted up to one side that ladder pole (1) was kept away from in plate body (311), one side swing joint that ladder pole (1) was kept away from in built-in groove (312) has striking toggle bolt (313), one side that ladder pole (1) was kept away from in striking toggle bolt (313) runs through plate body (311) and extends to plate body (311) outer wall.