Self-anchored well chamber ladder stand device

Abstract

The utility model relates to the technical field of pedal structures, in particular to a self-anchored well chamber ladder stand device which comprises a U-shaped ladder stand pedal, threaded sections are arranged at the two ends of the ladder stand pedal, fastening nuts are screwed on the threaded sections, expansion pipes are arranged on the two threaded sections in a sleeving mode, and a plurality of opening type notches are formed in the expansion pipes in an annular array mode. Compared with a pre-embedded type formwork which needs later processing and fixing and is inconvenient to disassemble and assemble, the ladder stand can be formed after being installed, additional workpieces do not need to be added, on-site manufacturing and installation are facilitated, the process is convenient, and the installation efficiency and precision of the ladder stand are improved; compared with the anchoring mode of embedded steel bar glue, the drilling depth is greatly reduced, the effect is attractive after installation, safety and reliability are achieved, the anti-pulling performance is excellent, and through tests, the embedded steel bar glue is not used, only the expansion sleeve anchoring mode is adopted, and the requirement for the anti-pulling performance is completely met. In addition, the drilling depth is small, and damage to workpieces such as steel bars in the valve well structure is reduced.

Description

Technical Field

[0001] This application relates to the technical field of pedal structures, and particularly to a self-anchoring well chamber ladder device. Background Art

[0002] Anchored or embedded ladders are provided in well chambers of various shapes such as drain valve wells, control valve wells, and air valve wells. Existing well chamber ladders mostly use pre-embedded metal overmolded ladders with hooks and post-installed metal overmolded ladders with straight anchor heads. However, they have the following specific disadvantages:

[0003] (1) For the pre-embedded metal overmolded ladder with hooks, the ladder metal components need to be welded and fixed to the well wall structure steel bar framework before installing the formwork. Its disadvantages are that the processing, fixing, or disassembly of the formwork in the later stage is somewhat difficult, the installation efficiency is low, and the spacing of the ladder is not easy to ensure.

[0004] (2) For the post-installed metal overmolded ladder with a straight anchor head, after the well wall concrete structure reaches the strength, holes are drilled in the well wall, and then the ladder is implanted by means of implanting steel bars. Its disadvantages are that the ladder is anchored only by the adhesion and friction of the implanting glue, and it is not easy to meet the requirements of the pull-out test, or the implanting depth needs to be relatively deep, the drilling workload is large, and the probability of damaging the internal steel bars of the structure is relatively high.

[0005] Therefore, this application provides a self-anchoring well chamber ladder device to improve the installation efficiency and firmness of the ladder.

[0006] Application Content

[0007] The purpose of this application is to solve the problems existing in the prior art, and to propose a self-anchoring well chamber ladder device.

[0008] To achieve the above purpose, this application adopts the following technical solutions:

[0009] A self-anchoring well chamber ladder device includes a U-shaped ladder pedal. Threaded sections are provided at both ends of the ladder pedal, and fastening nuts are screwed onto the threaded sections. Expansion tubes are sleeved on both threaded sections, and a plurality of open slits are annularly arranged on the expansion tubes.

[0010] Preferably, a card slot is provided near the end of the threaded section, and a closed end is provided at the end of the expansion tube.

[0011] Preferably, a gasket is provided between the expansion tube and the fastening nut.

[0012] Preferably, the diameter of the threaded section is smaller than the diameter of the rest part.

[0013] Preferably, a plurality of jacks are annularly arranged at the end of each fastening nut.

[0014] Preferably, pry frames are provided on the two cantilevers of the climbing ladder foot on the non-threaded section, and pry bars that fit into the jacks are inserted into the pry frames.

[0015] Preferably, the jack is flared.

[0016] Preferably, both ends of the climbing ladder foot are chamfered.

[0017] Compared with the prior art, the present application provides a self-anchoring well chamber climbing ladder device, which has the following beneficial effects:

[0018] This solution uses a tail extrusion type expansion sleeve, which changes the traditional form of pre-burying the well wall climbing ladder and only using planting glue for anchoring. And compared with the pre-buried type, which also requires post-processing and fixing templates later, and the disassembly and assembly of the templates are not convenient, this solution can be formed immediately after installation without adding additional workpieces. It is not only convenient for on-site production and installation, with convenient technology, but also speeds up the installation efficiency and accuracy of the well chamber climbing ladder; compared with the method of anchoring with planting glue, the drilling depth of this method is greatly reduced, and the effect after installation is beautiful, safe and reliable, with excellent anti-pulling performance. And through tests, without using planting glue and only using the form of expansion sleeve anchoring, it fully meets the anti-pulling performance requirements. And the small drilling depth also reduces the damage to internal steel bars and other workpieces in the valve well structure, which has a certain protective effect.

[0019] Other advantages, objectives and features of the present application will be described to some extent in the subsequent specification; and to some extent, based on the study of the following text, it will be obvious to those skilled in the art; or, it can be taught from the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the right axial view of the present application without a pry frame.

[0021] Figure 2 is the left axial view of the present application with a pry frame.

[0022] Figure 3 is the front view of the separation of the accessories of the present application.

[0023] Figure 4 For the present application Figure 2 partial schematic view at A.

[0024] In the figure: 1, climbing ladder foot; 2, threaded section; 3, card slot; 4, fastening nut; 5, gasket; 6, expansion tube; 7, jack; 8, pry frame; 9, pry bar. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will combine the attachments in the embodiments of the present application Figures 1-4, the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0026] To solve the problems existing in the prior art, this embodiment provides a self-anchoring well chamber ladder device, including a U-shaped ladder pedal 1. Both ends of the ladder pedal 1 are provided with threaded sections 2, and fastening nuts 4 are screwed on the threaded sections 2. Expansion tubes 6 are sleeved on both threaded sections 2 of the ladder pedal 1, and a plurality of open notches are annularly arranged on the expansion tubes 6.

[0027] Details of the principle of this embodiment:

[0028] A self-anchoring well chamber ladder device includes a metal ladder pedal 1, and the ladder pedal 1 is bent into a U shape. Threads are tapped at both ends of the ladder pedal 1 to form threaded sections 2. Fastening nuts 4 are screwed on the threaded sections 2. Expansion tubes 6 are sleeved on both threaded sections 2 of the ladder pedal 1, and a plurality of open notches are annularly arranged on the expansion tubes 6.

[0029] During the use process, first, preset points are lofted on the well wall, and then a percussion drill is used for drilling. Here, the drilling depth matches the extrusion expansion sleeve, generally less than the traditional rebar planting depth, and the hole diameter has a clearance fit with the outer wall of the expansion tube 6. Two drill holes are drilled at intervals on each horizontal plane, and the distance between the two drill holes matches the ladder pedal 1. After blowing the powder in the hole clean, then insert the anchoring heads at both ends of the ladder until the fastening nut 4 is close to the well wall (it should be at the farthest end before installation). Then, screw the fastening nut 4, and the fastening nut 4 moves towards the end of the ladder pedal 1 against the end of the expansion tube 6. The end of the expansion tube 6 abuts against the bottom wall of the drill hole, and the expansion tube 6 is deformed by extrusion, with the two ends contracting and the middle expanding to abut against the inner wall of the drill hole, thereby firmly clamping the ladder pedal 1 in the drill hole, and thus completing the fixed installation of the ladder pedal 1.

[0030] This solution adopts a tail extrusion type expansion sleeve, which changes the traditional form of pre-burying the well wall ladder and only using the rebar planting glue for anchoring. And compared with the pre-buried type which also requires post-processing and fixing templates later, and the disassembly and assembly of the templates are not convenient, this solution can be formed immediately after installation without adding additional workpieces. It is not only convenient for on-site production and installation, with a convenient process, but also speeds up the installation efficiency and accuracy of the well chamber ladder; compared with the rebar planting glue anchoring method, the drilling depth of this method is greatly reduced, and the installation effect is beautiful, safe and reliable, with excellent anti-pulling performance. And through tests, without using the rebar planting glue and only adopting the form of expansion sleeve anchoring, it fully meets the anti-pulling performance requirements. And the small drilling depth also reduces the damage to the internal steel bars and other workpieces in the valve well structure, and has a certain protective effect.

[0031] Preferably, rebar planting glue can be injected into the hole (the injection volume is determined according to tests to avoid over-injection and overflow) to enhance the anchoring effect.

[0032] In a further embodiment of this solution, a slot 3 is provided near the end of the threaded section 2 of the ladder step 1, and a closed end is provided at the end of the expansion tube 6. After the expansion tube 6 is placed over the ladder step 1, the closed end of the expansion tube 6 is pressed into the slot 3. In this way, after the ladder step 1 is inserted into the drilled hole, the fastening nut 4 is tightened, and the expansion tube 6 is buckled into the slot 3, expanding and deforming. It does not separate from the threaded section 2 of the ladder step 1, maintaining the tightness of the ladder step 1.

[0033] In a further embodiment of this solution, a gasket 5 is provided between the expansion tube 6 and the fastening nut 4. The gasket 5 fills the irregular end surface of the expansion tube 6 after expansion and deformation, thereby improving the low-pressure tightness between the fastening nut 4 and the expansion tube 6.

[0034] In a further embodiment of the present invention, the diameter of the threaded section 2 of the ladder step 1 is smaller than the diameter of the remaining portion, so as to limit the fastening nut 4 and prevent the fastening nut 4 from being separated from the threaded section 2.

[0035] In a further embodiment of this solution, each fastening nut 4 has a plurality of insertion holes 7 arranged in a circular array at its end. In this case, the drilled hole is a regular polygon. When the threaded section 2 of the ladder step 1 is inserted into the drilled hole, if a wrench or other tool is not conveniently used to grip the fastening nut 4, preventing it from being tightened properly, an insert such as a splayed wrench can be inserted into the drilled hole. Once inserted into the insertion hole 7, the insert can be grasped to rotate the fastening nut 4. After installation, the insert can be removed.

[0036] In a further embodiment of the present scheme, a pry frame 8 is provided on the two cantilevers of the ladder step 1 on the non-threaded section 2, and a frame hole is provided on the pry frame 8, into which a crowbar 9 that cooperates with the socket 7 is inserted. At this time, the socket 7 can be of any regular shape. Insert the crowbar 9 into the frame hole, and insert the end of the crowbar 9 into the socket 7, and then bend the crowbar 9 to drive the fastening nut 4 to deflect a certain angle. By changing the position of the socket 7 where the crowbar 9 is inserted multiple times, the fastening nut 4 can be driven to rotate in the drilled hole. Compared with directly inserting the plug-in into the socket 7, this method is more convenient for applying force. Pull out the crowbar 9 after installation.

[0037] In a further embodiment of this solution, the insertion hole 7 is flared, leaving a space margin for the crowbar 9 to deviate to the side.

[0038] In a further embodiment of this solution, both ends of the ladder step 1 are chamfered to facilitate the alignment and installation of the expansion tube 6 and the fastening nut 4.

[0039] As described above, it is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution of the present application and its application concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present application.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0041] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A self-anchoring manhole ladder device, characterized in that, It includes a U-shaped ladder step (1), both ends of the ladder step (1) are provided with threaded sections (2), fastening nuts (4) are screwed on the threaded sections (2), expansion tubes (6) are sleeved on both threaded sections (2), and a plurality of open notches are annularly arrayed on the expansion tubes (6).

2. The self-anchoring manhole ladder device according to claim 1, characterized in that, A clamping groove (3) is provided at the end of the threaded section (2) of the ladder step (1), and the end of the expansion tube (6) is provided with a closed end.

3. The self-anchoring manhole ladder device according to claim 1, characterized in that, A gasket (5) is provided between the expansion tube (6) and the fastening nut (4).

4. The self-anchoring manhole ladder device according to claim 1, wherein, The diameter of the threaded section (2) is smaller than the diameter of the rest part.

5. The self-anchoring manhole ladder device according to claim 1, characterized in that, A plurality of jacks (7) are annularly arrayed at the end of each fastening nut (4).

6. The self-anchoring well chamber ladder device according to claim 5, wherein, Prying frames (8) are provided on the two cantilevers of the ladder step (1) on the non-threaded sections (2), and prying bars (9) matching with the jacks (7) are inserted into the prying frames (8).

7. The self-anchoring manhole ladder device according to claim 6, characterized in that, The jacks (7) are flared.

8. A self-anchoring manhole ladder device according to claim 1, characterized in that, Both ends of the ladder step (1) are chamfered.

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