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CN-224200571-U - Plug-in type extension ladder based on valve lug

CN224200571UCN 224200571 UCN224200571 UCN 224200571UCN-224200571-U

Abstract

The utility model relates to an inserted telescopic ladder based on valve lifting lugs, which comprises a lower main ladder (1) and an upper auxiliary ladder (2), wherein a guide rail is arranged on the lower main ladder (1), a rail groove is formed in the upper auxiliary ladder (2), the upper auxiliary ladder (2) can slide up and down on the lower main ladder (1), and an up-down sliding mechanism and a crank block mechanism (20) are arranged between the lower main ladder (1) and the upper auxiliary ladder (2). The telescopic ladder can enable the upper auxiliary ladder (2) to slide up and down on the lower main ladder (1) through the up-down sliding mechanism, so that the height of the whole ladder is adjusted, the telescopic ladder is large in transverse telescopic quantity and suitable for valve lifting lugs of different sizes through the crank sliding block mechanism (20), the telescopic ladder has the characteristic of wide application range, the distance between the telescopic ladder and a valve can be adjusted through the adjusting rod, the angle between the telescopic ladder and the telescopic ladder can be adjusted, the applicable scene of the telescopic ladder is increased, and the problem of small adjustment range is solved.

Inventors

  • XIANG WENJIE
  • GAO JIN
  • HAN LONGSHENG
  • MA GUOYIN
  • QU WEIJIE
  • JIANG YOULIN

Assignees

  • 湖北泰和流体控制技术股份有限公司

Dates

Publication Date
20260505
Application Date
20250422

Claims (10)

  1. 1. The valve lifting lug-based plug-in type telescopic ladder comprises a lower main ladder (1) and an upper auxiliary ladder (2), wherein a guide rail is arranged on the lower main ladder (1), a rail groove is formed in the upper auxiliary ladder (2), and the upper auxiliary ladder (2) can slide up and down on the lower main ladder (1), and is characterized in that an up-down sliding mechanism and a crank block mechanism (20) are arranged between the lower main ladder (1) and the upper auxiliary ladder (2).
  2. 2. The valve lifting lug-based plug-in type telescopic ladder as claimed in claim 1, wherein the up-down sliding mechanism comprises two sliding blocks (3), two sliding rods (4), two pulley blocks (6) and a first pull rope (7), the two sliding blocks (3) are respectively positioned on two sides of the lower main ladder (1), the two sliding blocks (3) are connected together through the sliding rods (4), and the pulley blocks (6) are positioned at the junction of the lower main ladder (1) and the upper auxiliary ladder (2).
  3. 3. The valve lifting lug-based plug-in type telescopic ladder as claimed in claim 2, wherein adjusting rods (5) are arranged on two sides of the sliding rod (4), and kidney-shaped holes (19) are formed in the adjusting rods (5).
  4. 4. The valve lifting lug-based plug-in extension ladder according to claim 1, wherein the crank slider mechanism (20) comprises a middle cylinder (8), a crank (13), a connecting rod (14), a fixed pipe (11) and an extension pipe (12), the fixed pipe (11) and the extension pipe (12) are respectively positioned at two axial ends of the middle cylinder (8), and the lower end of the middle cylinder (8) is connected with the crank (13).
  5. 5. The valve lifting lug-based plug-in extension ladder as claimed in claim 4, wherein the crank (13) and the middle cylinder (8), the crank (13) and the connecting rod (14), and the connecting rod (14) and the extension tube (12) are all connected through hinge pins (15).
  6. 6. Valve lifting lug based plug-in extension ladder according to claim 4 or 5, characterized in that a spring (16) is arranged between the crank (13) and the intermediate cylinder (8).
  7. 7. A valve lifting lug based plug-in extension ladder as claimed in claim 4 or 5, characterised in that the crank (13) is provided with a second pull rope (17).
  8. 8. A valve lifting lug-based plug-in extension ladder as claimed in claim 3, characterized in that one end of the adjusting rod (5) is connected with the sliding rod (4) and the other end is connected with the support arm (9) through the stud (10), the tail end of the support arm (9) is connected to the middle cylinder (8), and the stud (10) is positioned in a kidney-shaped hole (19) of the adjusting rod (5).
  9. 9. The valve lifting lug-based plug-in extension ladder as claimed in claim 8, characterized in that the fixed tube (11) and the extension tube (12) are both located in the valve lifting lug after the installation.
  10. 10. Valve lifting lug-based plug-in extension ladder as claimed in claim 1, characterized in that the bottom of the lower main ladder (1) is provided with a base (18).

Description

Plug-in type extension ladder based on valve lug Technical Field The utility model belongs to the technical field of stop valves, and particularly relates to an inserted telescopic ladder based on a valve lifting lug. Background The ladder is widely applied to our daily life, takes two long thick rods as edges, and is internally inserted with equidistant cross bars for climbing, and is mainly divided into a single ladder and a herringbone ladder according to the appearance, wherein the single ladder has a simple structure, is convenient to operate, is relatively safe and reliable, and has higher stability. The single ladder is large in appearance, inconvenient to carry and single in functionality, the herringbone ladder is fixed in fork angle, the adjusting range is small, and the practicability is poor. The ladder for valve installation adopts single ladder easily fish tail valve outer wall or actuating mechanism, adopts the double ladder to need frequent change ladder position, and the operation is comparatively loaded down with trivial details. And the single ladder and the double ladder have the problems of small adjusting range, single functionality and the like. For example, chinese patent application publication No. CN 119466536A discloses a foldable extension ladder, which comprises a platform portion, a step portion connected to one end of the platform portion in a reversible manner, wherein the step portion has an inner ladder and an outer ladder, the left and right side walls of the inner ladder are provided with a plurality of positioning holes at different positions along the length direction thereof, the outer ladder is provided with a rotary type extension positioning connection structure, and the rotary type extension positioning connection structure can be fixedly mounted on the outer ladder and can be operatively inserted into the positioning holes so as to operatively position or slidingly connect the outer ladder to the outside of the inner ladder, so that the outer ladder is positioned and connected to different positions along the extension direction of the inner ladder. But this extension ladder can only carry out high regulation, can't be applicable to the place of width difference, and bottom stability is not good moreover. Disclosure of Invention Aiming at the problems in the prior art, the utility model provides an inserted telescopic ladder based on a valve lifting lug, which is transversely telescopic by arranging a crank block mechanism, can be suitable for the valve lifting lugs with different sizes and has wider application range. The utility model provides an inserted telescopic ladder based on a valve lifting lug, which comprises a lower main ladder and an upper auxiliary ladder, wherein a guide rail is arranged on the lower main ladder, a rail groove is formed in the upper auxiliary ladder, the upper auxiliary ladder can slide up and down on the lower main ladder, and an up-down sliding mechanism and a crank block mechanism are arranged between the lower main ladder and the upper auxiliary ladder. The telescopic ladder can enable the upper auxiliary ladder to slide up and down on the lower main ladder through the up-down sliding mechanism, so that the height of the whole ladder is adjusted, the telescopic ladder is enabled to be large in transverse telescopic quantity and suitable for valve lifting lugs of different sizes through the crank sliding block mechanism, the telescopic ladder has the characteristic of wide application range, the distance between the telescopic ladder and a valve can be adjusted through the adjusting rod, the angle between the telescopic ladder and the telescopic ladder can be adjusted, the applicable scene of the telescopic ladder is increased, and the problem of small adjustment range is solved. The upper sliding mechanism and the lower sliding mechanism are connected through the sliding rods, and the pulley block is positioned at the junction of the lower main ladder and the upper auxiliary ladder. During operation, the staff can adjust the height of whole telescopic ladder through pulling first stay cord. In any of the above schemes, preferably, two sides of the sliding rod are provided with adjusting rods, and kidney-shaped holes are formed in the adjusting rods. During operation, the telescopic ladder and the valve can be adjusted in distance by sliding the studs in the kidney-shaped holes through the crank slider mechanism, and the angle of the telescopic ladder can be adjusted, so that the applicable scene of the telescopic ladder is increased, and the problem of small adjusting range is solved. In any of the above schemes, preferably, the crank slider mechanism comprises a middle cylinder, a crank, a connecting rod, a fixed pipe and a telescopic pipe, wherein the fixed pipe and the telescopic pipe are respectively positioned at two axial ends of the middle cylinder, and the lower end of the middle cylinder is connected with the crank. In