Manhole ladder stand capable of being rapidly installed and folded

Abstract

The utility model provides a manhole ladder stand capable of being rapidly installed and folded. The manhole ladder stand comprises an embedded part, a foldable step and an opening and closing rod. The embedded part comprises two internal thread sleeves and two clamping pieces, the inner ends of the internal thread sleeves are embedded into the inner wall of the manhole, screw openings in the outer ends of the internal thread sleeves are suspended, and the clamping pieces are clamped and embedded in the surface layer of the inner wall of the manhole and clamped outside the internal thread sleeves; each group of foldable steps comprises two sections of connecting rods and a U-shaped step beam, the inner ends of the two connecting rods are screwed into the internal thread sleeves to be fixed, the outer ends of the two connecting rods are hinged to the two U-shaped ends of the step beam, and the bottom end limiting structure is used for restraining the step beam from stopping at the horizontal position; the opening and closing rod is a long rod connected with each group of step beams, and each group of step beams are controlled to be switched between a horizontal position and an upward vertical position around the same group of connecting rods by lifting or pulling down the opening and closing rod. The ladder stand has the advantages that the ladder stand can be folded, no equipment passing space is occupied, and the operation convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of supporting facilities for municipal and power engineering. Specifically, it relates to a manhole ladder that can be quickly installed and folded. Background Art

[0002] In the construction and maintenance work of municipal and power engineering, a large number of building facilities such as manholes and inspection wells will be encountered. Usually, corresponding ladder structures are provided for staff to enter and exit.

[0003] At present, the ladder structure is usually designed as a fixed structure, which often brings the following problems:

[0004] First, the fixed ladder structure needs to be pre-embedded in advance when building structures such as manholes and inspection wells. However, since most of the ladder is suspended, it often affects the normal construction of manholes and inspection wells, bringing operational difficulties to the construction.

[0005] Second, the fixed ladder structure always occupies a part of the space of the manhole. When it is necessary to repair equipment and enter and exit, it will also cause obstacles to entry and exit, affecting normal maintenance work.

[0006] Third, the suspended ladder is prone to form a habitat for foreign objects to invade and needs to be cleaned regularly.

[0007] To solve the above problems, it is necessary to transform the existing fixed ladder structure. Content of the Utility Model

[0008] The purpose of the utility model is to overcome the deficiencies of the prior art, and thus provide a manhole ladder that can be folded, no longer occupies the equipment passage space, and has improved operational convenience and can be quickly installed and folded.

[0009] To achieve the above purpose, the technical solution adopted by the utility model is: a manhole ladder that can be quickly installed and folded, including several groups of embedded parts and foldable steps, as well as opening and closing rods connecting each level of foldable steps;

[0010] Each group of the embedded parts includes two internal thread sleeves and two pieces of cards. The inner ends of the internal thread sleeves are pre-embedded into the inner wall of the manhole, and the outer ends of the internal thread sleeves are screwed and suspended. The cards are clamped on the surface layer of the inner wall of the manhole and clamped outside the internal thread sleeves. The two internal thread sleeves are horizontally arranged at a distance;

[0011] Each group of the foldable steps includes two connecting rods and a U-shaped step beam. The inner end of the connecting rod is a threaded section that matches the internal thread sleeve, and the outer end of the connecting rod is a hinge joint with a bottom limit structure. The inner ends of the two connecting rods are screwed into the internal thread sleeve for fixation, and the outer ends of the two connecting rods are hinged to the two U-shaped ends of the step beam. The bottom limit structure is used to restrict the step beam from rotating in the horizontal position;

[0012] The opening and closing rod is a long rod connecting each group of step beams. By lifting or pulling down the opening and closing rod, each group of step beams is controlled to switch between the horizontal position and the upward vertical position around the connecting rods of the same group.

[0013] Preferably, the step beam is a telescopic step beam. The crossbeam area of the step beam is divided into two sections, and the two crossbeams are connected by a telescopic joint, so that the crossbeam of the step beam can be telescoped.

[0014] Preferably, the bottom limit structure of the connecting rod is a stepped structure, and the U-shaped end of the step beam is provided with a matching structure, so that the foldable step beam can only rotate around the hinge point between the horizontal position and the upward vertical position.

[0015] Preferably, the connecting rod and the U-shaped end of the step beam are hinged by a bolt or a rivet or a pin shaft with a smooth middle part.

[0016] Preferably, the surface of the step beam is set as a rough surface.

[0017] Preferably, the surface of the internal thread sleeve is set as a rough surface.

[0018] Preferably, the card is a steel plate card or a hard plastic card.

[0019] Preferably, the main body parts of the connecting rod and the step beam are both solid iron or steel structures.

[0020] Preferably, the opening and closing rod is a rubber rod or a light metal rod, and the opening and closing rod is hinged to each step beam.

[0021] Preferably, the top end of the opening and closing rod is provided with a handle bent at 90°.

[0022] The utility model has substantial features and progress compared with the prior art. Specifically, the utility model has the following advantages:

[0023] 1. It adopts the form of a combination of embedded parts, foldable steps and opening and closing rods to form an assembled structure, which can be rotated and opened and closed, unfolded during use and folded when not in use, greatly improving the space utilization rate of the manhole and the equipment passability.

[0024] 2. Due to the prefabricated structural design, this structure can be quickly installed and disassembled. During the manhole construction process, only the embedded parts need to be installed in place, without worrying about the spatial interference problems in subsequent construction.

[0025] 3. The tread beam is designed as a telescopic structure, reducing the installation difficulty caused by the width mismatch due to the error of the embedded parts.

[0026] 4. It changes the traditional form of the manhole ladder. After installation, it has a beautiful appearance, is safe and reliable, has excellent use performance, and through on-site tests, the construction installation efficiency and quality have been greatly improved, fully meeting the use function of personnel going up and down, and saving the manhole space. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the structural decomposition diagram of a manhole ladder that can be quickly installed and folded in the present utility model.

[0028] Figure 2 is the usage state diagram of a manhole ladder that can be quickly installed and folded in the present utility model.

[0029] In the figure: 1. Opening and closing rod; 2. Foldable tread; 201. Telescopic joint; 202. Tread beam; 203. Connecting rod; 204. Bolt; 205. Nut; 206. Internal thread sleeve; 207. Card. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following further describes the technical solutions of the present utility model in detail through specific embodiments.

[0031] As Figure 1 and Figure 2 shown, a manhole ladder that can be quickly installed and folded includes several groups of embedded parts and foldable treads 2, as well as an opening and closing rod 1 connecting each level of foldable treads 2.

[0032] Each group of the embedded parts includes two internal thread sleeves 206 and two cards 207. The inner ends of the internal thread sleeves 206 are embedded into the inner wall of the manhole, and the outer ends of the internal thread sleeves 206 are screwed and suspended. The cards 207 are clamped on the surface of the inner wall of the manhole and clamped outside the internal thread sleeves 206. The two internal thread sleeves 206 are horizontally arranged at a distance. In this embodiment, the surface of the internal thread sleeve 206 is set as a rough surface to play an anti-slip role, and the card 207 is a steel plate card or a hard plastic card.

[0033] Each set of the foldable steps 2 includes two connecting rods 203 and a U-shaped step beam 202. The inner end of the connecting rod 203 is a threaded section that matches the internal thread sleeve, and the outer end of the connecting rod 203 is a hinge joint with a bottom end limiting structure. The inner ends of the two connecting rods 203 are screwed into the internal thread sleeve 206 for fixation, and the outer ends of the two connecting rods 203 are hinged to the two U-shaped ends of the step beam 202. The bottom end limiting structure is used to restrict the step beam 202 from rotating in the horizontal position. In this embodiment, the bottom end limiting structure of the connecting rod 203 is a stepped structure, and the U-shaped ends of the step beam 202 are provided with a matching structure so that the step beam can only rotate around the hinge point between the horizontal position and the upward vertical position. The connecting rod 203 and the U-shaped ends of the step beam 202 are hinged through a bolt 204 with a smooth middle rod and a nut 205, or hinged through a rivet or a pin shaft.

[0034] In this embodiment, since the internal thread sleeve 206 is installed by embedding, there may be installation errors. Therefore, the step beam 202 is a telescopic step beam. The cross beam area of the step beam 202 is divided into two sections, and the two cross beams are connected by a telescopic joint 201, so that the cross beam of the step beam 202 can be telescopic. The telescopic joint 201 can be designed in the form of a telescopic structure at the butt end of the cross beam, or in the form of an intermediate section that is thinner than the cross beam and is sleeved in the inner holes of the two cross beams. The ultimate goal is to make the length of the cross beam adjustable within a certain range to achieve telescoping.

[0035] The surface of the step beam 202 is set as a rough surface to play an anti-slip role. The main parts of the connecting rod 203 and the step beam 202 are both solid iron or steel structures to ensure strength.

[0036] The opening and closing rod 1 is a long rod connecting each group of step beams 202. By lifting or pulling down the opening and closing rod 1, the step 2 beams of each group are controlled to switch between the horizontal position and the upward vertical position around the connecting rod 203 of the same group.

[0037] The opening and closing rod 1 is a rubber rod or a light metal rod. The opening and closing rod 1 is hinged to each step beam 202, and the top end of the opening and closing rod 1 is provided with a handle bent at 90°.

[0038] Technical principle:

[0039] When using the card 207, it is applicable to the cast-in-place structure. Drill holes in the erected formwork, then insert the internal thread sleeve 206 into the holes, and use the card 207 to clamp the groove at the end of the sleeve. There are reserved hole position marks on the card 207, and the hard plastic card can be fixed on the formwork with iron nails or composite glue; if it needs to be installed on precast components, the sleeve is implanted into the drilled holes by drilling and implanting with planting glue. To avoid installation errors of the embedded bolts resulting in the inability to install the steps, the step beam adopts a two-section telescopic type.

[0040] The relevant experimental verification has been carried out for this solution. Depending on the 25,000 kW / 100,000 kW·h grid-connected energy storage supporting 100,000 kW photovoltaic project in Liushuquan, there are many manholes and inspection wells in this project, and the later maintenance work is frequent. Such ladders have accelerated the installation speed and accuracy of the side wall formwork of the above-mentioned structures during the construction process, ensured the construction quality, improved the passability of the manholes, and have pertinence and economic value.

[0041] Finally, it should be noted that the above has made a detailed description of the preferred embodiment of this patent, but this patent is not limited to the above embodiment. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can also be made without departing from the gist of this patent.

Claims

1. A manhole ladder that can be quickly installed and folded, characterized in that: It includes several groups of embedded parts and foldable steps, and opening and closing rods connecting the foldable steps at various levels; Each set of embedded parts includes two inner thread sleeves and two cards, the inner ends of the inner thread sleeves are embedded in the inner wall of the manhole, the outer end screws of the inner thread sleeves are suspended, the cards are embedded in the surface of the inner wall of the manhole and stuck outside the inner thread sleeves, and the two inner thread sleeves are arranged horizontally and at intervals; Each group of foldable steps comprises two connecting rods and a U-shaped step beam, the inner end of the connecting rod is a threaded section matching the inner thread sleeve, the outer end of the connecting rod is a hinged joint with a bottom end limiting structure, the inner ends of the two connecting rods are screwed into the inner thread sleeve for fixing, the outer ends of the two connecting rods are hinged to the two U-shaped ends of the step beam, and the bottom end limiting structure is used to constrain the step beam to stop rotating in a horizontal position; The opening and closing rod is a long rod connecting each group of step beams. By lifting or pulling down the opening and closing rod, each group of step beams is controlled to switch between a horizontal position and an upward vertical position around the same group of connecting rods.

2. The manhole ladder that can be quickly installed and folded according to claim 1 is characterized in that: The step beam is a telescopic step beam, and the cross beam area of ​​the step beam is divided into two sections. The two sections of the cross beam are connected by a telescopic joint, so that the cross beam of the step beam is telescopic.

3. The manhole ladder that can be quickly installed and folded according to claim 1 or 2, characterized in that: The bottom limit structure of the connecting rod is a stepped structure, and the U-shaped end of the step beam is provided with a structure adapted thereto, so that the step beam can only rotate around the hinge point between a horizontal position and an upward vertical position.

4. The manhole ladder that can be quickly installed and folded according to claim 3 is characterized in that: The connecting rod is hinged to the U-shaped end of the step beam through bolts, rivets or pins of the middle polished rod.

5. The manhole ladder that can be quickly installed and folded according to claim 4 is characterized in that: The surface of the step beam is configured as a rough surface.

6. The manhole ladder that can be quickly installed and folded according to claim 5 is characterized in that: The surface of the inner thread sleeve is configured as a rough surface.

7. The manhole ladder that can be quickly installed and folded according to claim 6 is characterized in that: The card is a steel plate card or a hard plastic card.

8. The manhole ladder that can be quickly installed and folded according to claim 7 is characterized in that: The main parts of the connecting rod and the step beam are both solid iron or steel structures.

9. The manhole ladder that can be quickly installed and folded according to claim 3 is characterized in that: The opening and closing rod is a rubber rod or a light metal rod, and the opening and closing rod is hingedly connected to each step beam.

10. The manhole ladder that can be quickly installed and folded according to claim 9, characterized in that: A handle bent 90° is arranged on the top end of the opening and closing rod.

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