A steel pipe-turnbuckle type air defense door frame adjustment and fixing device

Abstract

This utility model belongs to the technical field of civil defense door frame installation, specifically relating to a "steel pipe-turnbuckle" civil defense door frame adjustment and fixing device; it includes a civil defense door frame located on the upper part of a raft foundation; the door frame on the side where the door leaf opens is connected to embedded parts in the raft foundation via steel pipes and turnbuckles, with the steel pipes and turnbuckles using the raft foundation as a reaction force to support and restrict the door frame to remain upright; after the invention is used, it can be formed in one go by pouring raft concrete, avoiding repeated pouring processes and improving the integrity of the civil defense structure; at the same time, the turnbuckles are tightened before pouring the raft concrete to precisely adjust the verticality of the door frame and perform quality control in advance.

Description

Technical Field

[0001] This utility model belongs to the technical field of civil defense door frame installation, specifically relating to a "steel pipe-turnbuckle" civil defense door frame adjustment and fixing device. Background Technology

[0002] Currently, traditional civil defense doors are erected through a process of "binding the reinforcement of the foundation slab or floor slab, pre-embedding the support components of the frame → reserving the post-cast trench, pouring the concrete of the foundation slab or floor slab → erecting the door frame, erecting the door frame support → pouring the concrete of the post-cast trench → binding the reinforcement of the door frame wall → closing the formwork for inspection and adjusting the verticality deviation → pouring the concrete of the door frame wall". The construction quality is limited by factors such as the placement of the post-cast trench and the quality of the concrete pouring. The resulting door frame has a large verticality deviation. Moreover, the erection process may damage the bound reinforcement and is not conducive to ensuring the integrity of the concrete of the civil defense structure. Utility Model Content

[0003] This utility model aims to solve the problem that the installation of the door frame of a civil defense door has an adverse effect on the binding of the wall column reinforcement, and that the verticality of the final door frame is difficult to control.

[0004] This utility model provides the following technical solution: a "steel pipe-turnbuckle" air defense door frame adjustment and fixing device, including an air defense door frame, which is located on the upper part of the raft foundation; the air defense door frame is located on the side where the door leaf is opened and is connected to the embedded parts in the raft foundation through steel pipe and turnbuckle, and the steel pipe and turnbuckle are supported by the raft foundation as a reaction force to restrict the air defense door frame to remain upright.

[0005] Furthermore, the embedded parts include transverse embedded tie bars and two diagonal embedded tie bars embedded in the raft foundation. The two diagonal embedded tie bars are fixed at both ends of the transverse embedded tie bars, and the upper part of the diagonal embedded tie bars extends out of the surface of the raft foundation. The upper ends of the two diagonal embedded tie bars are fixedly connected to steel pipes, and the two longitudinal frames of the air-raid shelter door frame are connected to steel pipes by turnbuckles.

[0006] Furthermore, the adjusting rod of the turnbuckle is connected to the longitudinal frame of the air-raid shelter door, and the pull rod end of the turnbuckle is connected to the steel pipe.

[0007] Furthermore, the center lines of the obliquely embedded tie bars, steel pipes, and turnbuckles are aligned.

[0008] Furthermore, the horizontally embedded tie bars are parallel to the horizontal frame of the air-raid shelter door.

[0009] Furthermore, the transversely embedded tie bars are connected and fixed to the steel bars in the raft foundation.

[0010] Furthermore, the obliquely embedded tie bars are welded to the steel pipe, and the overlap length of the welds is not less than 10cm.

[0011] Furthermore, the steel pipe has a wall thickness of 2.8mm, a diameter of φ48, and a length of 1.5m; the turnbuckle is an M14 turnbuckle.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] This utility model provides a "steel pipe-turnbuckle" adjustment and fixing device for the door frame of a civil defense door. It utilizes the fine-tuning function of the turnbuckle to correct the verticality of the door frame in real time, significantly reducing the cumulative deviation of traditional processes. After the new device is used, it can be formed in one go by pouring raft concrete, avoiding repeated pouring processes and improving the integrity of the civil defense structure. At the same time, the turnbuckle device can be tightened before pouring the raft concrete to precisely adjust the verticality of the door frame of the civil defense door, and to carry out quality control in advance. Attached Figure Description

[0014] Figure 1 A front view of the "steel pipe-turnbuckle" air defense door frame adjustment and fixing device;

[0015] Figure 2 This is a side view of the "steel pipe-turnbuckle" air defense door frame adjustment and fixing device.

[0016] In the diagram: 1- door frame of the air-raid shelter; 2- raft foundation; 3- horizontal embedded tie bars; 4- diagonal embedded tie bars; 5- steel pipe; 6- turnbuckle. Detailed Implementation

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] like Figure 1 , Figure 2 As shown: A "steel pipe-turnbuckle" air defense door frame adjustment and fixing device includes an air defense door frame 1, which is located on the upper part of the raft foundation 2. The air defense door frame 1 is located on the side where the door leaf is opened and is connected to the embedded parts in the raft foundation 2 through steel pipes 5 and turnbuckles 6. The steel pipes 5 and turnbuckles 6 use the raft foundation 2 as a reaction force to support and restrict the air defense door frame 1 to remain upright.

[0019] The embedded parts include transverse embedded tie bars 3 and two diagonal embedded tie bars 4 embedded in the raft foundation 2. The two diagonal embedded tie bars 4 are fixed at both ends of the transverse embedded tie bars 3 respectively. The upper part of the diagonal embedded tie bars 4 extends out of the upper surface of the raft foundation 2. The upper ends of the two diagonal embedded tie bars 4 are fixedly connected to steel pipes 5. The two longitudinal frames of the air-raid shelter door frame 1 are connected to steel pipes 5 respectively by turnbuckles 6.

[0020] Through the coordinated force-bearing system of "horizontal pre-embedded tie bars 3 - diagonal pre-embedded tie bars 4 - steel pipe 5 - turnbuckle 6", the raft foundation 2 is used as the reaction force source, and the fine-tuning function of the turnbuckle 6 is used to achieve precise control of the verticality of the door frame.

[0021] The adjusting rod of the turnbuckle 6 is connected to the longitudinal frame of the air defense door frame 1, and the pull rod end of the turnbuckle 6 is connected to the steel pipe 5.

[0022] The center lines of the obliquely embedded tie bars 4, steel pipes 5 and turnbuckles 6 are aligned; the center line alignment design eliminates eccentric force and ensures load transfer efficiency.

[0023] The horizontally embedded tie bars 3 are parallel to the horizontal frame of the air-raid shelter door 1. The horizontally embedded tie bars 3 are connected and fixed to the steel bars in the raft foundation 2; the embedded parts are integrated with the foundation steel bars to form a rigid triangular support base (horizontal steel bars + diagonal steel bars), providing stable reaction support for subsequent adjustments.

[0024] The obliquely embedded tie bar 4 is welded to the steel pipe 5, and the overlap length of the weld is not less than 10cm; the long weld (≥10cm) ensures the connection strength of the steel pipe-reinforcing bar node.

[0025] The steel pipe 5 has a wall thickness of 2.8mm, a diameter of φ48, and a length of 1.5m; the turnbuckle 6 is an M14 turnbuckle.

[0026] The specific operating steps for the "steel pipe-turnbuckle" air-raid shelter door frame adjustment and fixing device are as follows:

[0027] 1. Fabricate a “steel pipe-turnbuckle” adjustment and fixing device for the air-raid shelter door frame: Use a steel pipe with a wall thickness of 2.8mm, a diameter of φ48, and a length of 1.5m, and M14 turnbuckles. Fabricate the “steel pipe-turnbuckle” adjustment and fixing device for the air-raid shelter door frame in advance. Weld one end of the hook of the turnbuckle 6 firmly to the steel pipe 5, and keep the centerline of the turnbuckle 6 consistent with the centerline of the steel pipe 5.

[0028] 2. Measurement and positioning: When conducting basic measurement and layout, locate and mark the installation position of the air defense door in advance.

[0029] 3. Fixed functional reinforcement: During the binding of the raft foundation reinforcement, on the side of the air-raid shelter door that is open, at a distance of about 1.3m from the wall, place a 2m long functional reinforcement (horizontal pre-embedded tie reinforcement 3) with a diameter of C20, and bind it firmly to the bottom reinforcement of the raft foundation for welding the diagonal pre-embedded tie reinforcement 4.

[0030] 4. Welding of the oblique pre-embedded tie bars 4: After the raft slab reinforcement is tied, hoist the door frame 1 of the air-raid shelter to the design position. According to the position and net width of the door frame, weld two short steel bars (oblique pre-embedded tie bars 4) with a length of 1m and a diameter of C20 to the functional bars (horizontal pre-embedded tie bars 3) at the corresponding positions. The inclination angle is about 60° with the ground.

[0031] 5. Lifting and lowering the door frame 1 of the air-raid shelter: The workers take temporary support measures to place the door frame 1 of the air-raid shelter vertically on the raft slab reinforcement. Before welding, roughly adjust the verticality of the door frame.

[0032] 6. Install the "steel pipe-turnbuckle" adjustment device: Weld one end of the pre-welded "steel pipe-turnbuckle" adjustment device to the obliquely embedded tie bar 4, and the other end to the inside of the air-raid shelter door frame 1. The welding point is approximately 1.5m above the top elevation of the raft slab. The welding length between the obliquely embedded tie bar 4 and the steel pipe 5 is ≥10cm. The end of the turnbuckle 6 is fully welded to the inside of the air-raid shelter door frame 1. The "steel pipe-turnbuckle" adjustment device is symmetrically installed on both inner sides of the air-raid shelter door frame 1.

[0033] 7. Initial adjustment of the verticality of the air-raid shelter door frame 1: After welding is completed, rotate the turnbuckles 6 on both sides to adjust the air-raid shelter door frame 1. Before the raft concrete is poured, the verticality deviation of the door frame is precisely adjusted.

[0034] 8. Pour the raft foundation concrete, tie the wall and column reinforcement bars, and weld the door hooks.

[0035] 9. Double-check the verticality of the air-raid shelter door frame 1: After the reinforcement binding of the second basement wall and the welding of the air-raid shelter door hook are completed, before closing the formwork, double-check the verticality of the air-raid shelter door frame 1 to ensure that the verticality deviation of the door frame is controlled within 2.5mm to meet the corresponding specifications.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A "steel pipe-turnbuckle" door frame adjustment and fixing device for air-raid shelters, characterized in that: Includes the door frame (1) of the civil defense door, which is located on the upper part of the raft foundation (2). The door frame (1) of the civil defense door is located on the side where the door is opened and is connected to the embedded parts in the raft foundation (2) through steel pipe (5) and turnbuckle (6). The steel pipe (5) and turnbuckle (6) use the raft foundation (2) as a reaction force to support and restrict the door frame (1) of the civil defense door to remain upright.

2. The "steel pipe - basket bolt" civil defense door frame adjusting and fixing device according to claim 1, characterized in that: The embedded parts include a transverse embedded tie bar (3) and two diagonal embedded tie bars (4) embedded in the raft foundation (2). The two diagonal embedded tie bars (4) are fixed at both ends of the transverse embedded tie bar (3). The upper part of the diagonal embedded tie bar (4) extends out of the upper surface of the raft foundation (2). The upper ends of the two diagonal embedded tie bars (4) are fixedly connected to steel pipes (5). The two longitudinal frames of the air defense door frame (1) are connected to steel pipes (5) by turnbuckles (6).

3. The "steel pipe - basket bolt" civil defense door frame adjusting and fixing device according to claim 2, characterized in that: The adjusting rod of the turnbuckle (6) is connected to the longitudinal frame of the door frame (1) of the air defense door, and the pull rod end of the turnbuckle (6) is connected to the steel pipe (5).

4. The "steel pipe - basket bolt" civil defense door frame adjusting and fixing device according to claim 2, characterized in that: The center lines of the obliquely embedded tie bars (4), steel pipe (5) and turnbuckle (6) are aligned.

5. The "steel pipe-turnbuckle" air-raid shelter door frame adjustment and fixing device according to claim 4, characterized in that: The horizontal pre-embedded tie bars (3) are parallel to the horizontal frame of the air-raid shelter door frame (1).

6. The "steel pipe - basket bolt" civil defense door frame adjusting and fixing device according to claim 5, characterized in that: The horizontal pre-embedded tie bars (3) are connected and fixed to the steel bars in the raft foundation (2).

7. The "steel pipe - basket bolt" civil defense door frame adjusting and fixing device according to claim 2, characterized in that: The obliquely embedded tie bar (4) is welded to the steel pipe (5), and the overlap length of the weld is not less than 10cm.

8. The "steel pipe-basket bolt" civil defense door frame adjusting and fixing device according to any one of claims 2-7, characterized in that: The steel pipe (5) has a wall thickness of 2.8 mm, a diameter of φ48, and a length of 1.5 m; the turnbuckle (6) is an M14 turnbuckle.

Images