A low-carbon fixing device for civil defense door frames

Abstract

This utility model discloses a low-carbon fixing device for civil defense door frames, belonging to the field of civil defense door frame installation technology. It includes diagonal bracing rods, with at least one rod on each of the inner and outer sides of the civil defense door frame for lateral support. The length of each diagonal bracing rod is freely adjustable. Diagonal bracing bases are correspondingly arranged to the number of diagonal bracing rods and are fixed to the ground on the front and rear sides of the civil defense door frame, hinged to the bottom end of each diagonal bracing rod. This utility model is applicable to the installation of civil defense door frames in all civil defense projects. The entire construction process employs a wrap-around, weld-free fixing operation and a four-corner tightening method, which not only effectively avoids atmospheric and environmental pollution caused by steel reinforcement welding but also has the advantages of firm positioning, adjustable position, and simple operation. It also avoids the problem of the door frame's verticality being unadjustable later.

Description

Technical Field

[0001] This utility model belongs to the field of civil defense door frame installation technology, and in particular relates to a low-carbon fixing device for civil defense door frames. Background Technology

[0002] Civil defense projects are an important component of air defense and serve as vital shelters for personnel and supplies, as well as places to protect lives and property during wartime. Their construction quality plays a crucial role in protecting lives and property and facilitating rapid recovery and development during wartime.

[0003] Currently, the installation process for civil defense door frames typically involves the manufacturer producing the frames, transporting them to the construction site, and then using tower cranes or other vertical lifting equipment to hoist them into place before construction workers weld them securely. Due to the significant weight of the civil defense door, after positioning, to ensure the door frame's stability, it is necessary to weld and fix it using reinforcing bars or steel pipes. This includes welding the door frame to the surrounding shear wall reinforcement, welding the door frame to the ground beam reinforcement, and welding the door frame's diagonal braces, among other points. This welding process inevitably causes light and air pollution. Furthermore, the verticality of the welded door frame cannot be adjusted before concrete pouring, and vertical deviations caused by disturbance during construction severely affect the construction quality. Therefore, we propose a low-carbon fixing device for civil defense door frames to address the aforementioned problems. Summary of the Invention

[0004] In view of this, in order to solve the problems that traditional fixing methods are all welding fixing, which pollutes the surrounding atmosphere and environment during the welding process, and cannot adjust the verticality of the air defense door frame after welding, thus affecting the quality of the main body, this utility model provides a low-carbon fixing device for air defense door frames.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-carbon fixing device for a civil defense door frame, including a diagonal brace, at least one of which is provided on the inner and outer sides of the civil defense door frame for supporting the two sides of the civil defense door frame, and the length of the diagonal brace can be freely adjusted. It also includes a diagonal brace base, which is set in accordance with the number of diagonal braces and is fixed on the ground on the front and rear sides of the air-raid shelter door frame, and is hinged to the bottom end of the diagonal brace. It also includes a top clamp, at least one of which is provided, which is tightly clamped to the inner side of the upper frame of the air-raid shelter door frame, and the top ends of the two opposing diagonal braces are hinged to the same top clamp, which is used to support and position the air-raid shelter door frame. It also includes channel steel, at least one of which passes through the interior of the air-raid shelter door frame and is close to the inner side of its lower frame. The bottom of the channel steel is symmetrically provided with two sets of positioning parts for clamping and positioning the lower frame of the air-raid shelter door frame. It also includes clamping components, with at least two sets, which are pre-embedded in the ground on the front and rear sides of the air-raid shelter door frame to clamp and fix the channel steel.

[0006] Furthermore, the diagonal brace includes a symmetrically arranged rod body I and a rod body II. The ends of rod body I and rod body II that are far apart from each other are respectively hinged to the top clamp and the diagonal brace base. The ends of rod body I and rod body II that are close to each other are both fixedly provided with adjusting screws, and the same nut rotating sleeve is threaded on the two adjusting screws.

[0007] Furthermore, the threads on the two adjusting screws are arranged in opposite directions.

[0008] Furthermore, the clamping component includes two fixed rods symmetrically embedded in the ground. The top ends of both fixed rods extend upward and are provided with threaded sections. The channel steel is positioned between the two fixed rods by abutting against each other. The same clamping plate is fitted on the two threaded sections. The clamping plate presses against the top of the channel steel and is locked by a matching nut.

[0009] Furthermore, the channel steel is an I-beam.

[0010] Furthermore, the positioning component includes two positioning angle steels that are symmetrically fixedly connected to the bottom of the channel steel. The bent surfaces of the two positioning angle steels face outwards and are tightly bound to the inner and outer sides of the lower frame of the air-raid shelter door.

[0011] Furthermore, the positioning angle steel is fixedly connected to the channel steel by at least two fixing bolts and matching nuts.

[0012] Furthermore, the inclined support base is detachably connected to the foundation plate by bolts, and the foundation plate is positioned on the ground on the front and rear sides of the air-raid shelter door frame.

[0013] The embodiments of this utility model have the following beneficial effects: 1. Through the design of prefabricated components and pre-positioning, the air-raid shelter door frame can be quickly supported and positioned after being hoisted to the designated location. The operation is simple, the support stability is good, and the construction efficiency is effectively improved.

[0014] 2. By using diagonal bracing rods to tighten the four corners of the upper frame of the air-raid shelter door, and in conjunction with the top clamps to hold the inner side of the upper frame, the air-raid shelter door can be supported upwards. At the same time, the channel steel presses against the lower frame of the air-raid shelter door, and the two positioning angle steels hold and position the lower frame of the air-raid shelter door on both the inner and outer sides. This can effectively prevent the overall position of the air-raid shelter door and its tilting in the plane when subjected to different external forces, ensuring that the air-raid shelter door will not have difficulty opening or closing after installation.

[0015] 3. By adjusting the length of the diagonal brace, the verticality of the air-raid shelter door frame can be adjusted using data measured by vertical measuring instruments such as plumb lines when verticality deviation occurs; by manipulating the positioning angle steel, the position of the air-raid shelter door frame can be corrected when its axis position moves, thereby ensuring the installation quality of the air-raid shelter door frame.

[0016] 4. The design of the top clamp, channel steel and positioning angle steel not only provides stable support for the air defense door frame, but also eliminates the need to weld the upper frame of the air defense door frame or the lower frame to the ground beam reinforcement. This ensures the fixed strength of the air defense door frame while effectively avoiding weld damage at the weld points between the main reinforcement and the air defense door frame, thus guaranteeing the construction quality of the air defense door frame and the surrounding reinforcement.

[0017] This utility model can be applied to the installation of civil defense door frames in all civil defense projects. The entire construction process adopts a wrap-around, weld-free fixing operation and a four-corner clamping fixing method, which can not only effectively avoid atmospheric and environmental pollution caused by steel bar welding, but also has the advantages of firm positioning, adjustable position, and simple operation. It also avoids the problem of the door frame verticality being unable to be adjusted later.

[0018] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall structure of a low-carbon fixing device for civil defense door frames according to the present invention. Figure 2 This is a schematic diagram of the connection structure between the foundation plate and the diagonal brace. Figure 3 An exploded view of the connection structure between the channel steel, the clamping plate, and the positioning angle steel; Figure 4 This is a schematic diagram of the connection structure between the channel steel and the positioning angle steel. Figure 5 This is a schematic diagram of the diagonal brace.

[0020] In the diagram: 1. Ground; 2. Civil defense door frame; 3. Foundation plate; 4. Diagonal brace base; 5. Diagonal brace rod; 51. Rod body I; 52. Rod body II; 53. Adjusting screw; 54. Nut rotating sleeve; 6. Top clamp; 7. Channel steel; 71. Strip hole; 8. Fixing rod; 81. Threaded section; 9. Pressure plate; 91. Hole I; 10. Positioning angle steel; 101. Hole II; 11. Fixing bolt. Detailed Implementation

[0021] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0022] Example 1: Please refer to Figure 1 As shown, this embodiment provides a low-carbon fixing device for a civil defense door frame, including diagonal braces 5. At least one diagonal brace 5 is provided on both the inner and outer sides of the civil defense door frame 2 for supporting both sides of the door frame 2. Preferably, there are four diagonal braces 5, which are used to provide opposing support to the upper frame of the civil defense door frame 2 near the two corners, thereby improving the overall stability of the support. The angle between the diagonal brace 5 and the ground 1 is preferably 45-60 degrees to ensure its support strength. Furthermore, the length of the diagonal brace 5 can be freely adjusted. By adjusting the length of the diagonal brace 5, not only is it convenient to support and install the civil defense door frame 2, but the verticality of the civil defense door frame 2 can also be adjusted after concrete pouring, ensuring construction quality.

[0023] See Figure 1 and Figure 2 As shown, the system also includes multiple diagonal brace bases 4 corresponding to the number of diagonal braces 5. These bases can be pre-fixed at predetermined positions on the inner and outer sides of the air-raid shelter door frame 2 to support the subsequent installation of the diagonal braces 5. Additionally, foundation plates 3 can be installed on the inner and outer sides of the air-raid shelter door frame 2. These foundation plates 3 are positioned and connected to the ground 1 via insertion rods. The diagonal brace bases 4 can be fixed to the foundation plates 3 using bolts and matching nuts, offering better stability and easier installation compared to direct installation on the ground 1. During installation, the bottom end of the diagonal brace 5 is hinged to the diagonal brace base 4. This hinge connection can be achieved through locking the bolts, pins, and matching nuts, or other connection methods. Specific connection methods will not be elaborated upon here.

[0024] See Figure 1 and Figure 2 As shown, it also includes a top clamp 6, the number of which corresponds to the number of sets of diagonal braces 5 supporting each other. Assuming two diagonal braces 5 supporting the inner and outer sides of the air-raid shelter door frame 2 in opposite directions form a set, then one top clamp 6 is provided. If two sets are provided in this design for supporting the upper frame of the air-raid shelter door frame 2 on both sides, then two top clamps 6 are symmetrically provided, and the tops of the two diagonal braces 5 in the same set are hinged to the same top clamp 6. Furthermore, the top clamp 6 uses two symmetrically arranged angle steels to tighten the upper frame of the air-raid shelter door frame 2, and the two angle steels are fixed together by double-ended bolts and matching nuts. The top of the diagonal brace 5 is hinged to the bottom of the angle steel. This design eliminates the need for welding on the air-raid shelter door frame 2, thus avoiding weld damage to the upper frame. Furthermore, it ensures the verticality of the air-raid shelter door frame 2 while providing an upward pulling force. It also ensures a sufficient concrete protective layer between the lower frame of the air-raid shelter door frame 2 and the ground beam reinforcement. Additionally, the adjacent corner arrangement of the upper support provides a horizontal thrust to the upper part of the air-raid shelter door frame 2, preventing displacement at the top when subjected to lateral thrust.

[0025] See Figure 5 As shown, the diagonal brace 5 includes symmetrically arranged rods I 51 and II 52. The ends of rods I 51 and II 52 that are far apart from each other are hinged to the top clamp 6 and the diagonal brace base 4, respectively. Adjusting screws 53 are fixedly provided at the ends of rods I 51 and II 52 that are close to each other, and the threads on the two adjusting screws 53 are arranged in opposite directions. The same nut rotating sleeve 54 is threaded onto the two adjusting screws 53. By rotating the nut rotating sleeve 54, rods I 51 and II 52 can be moved relatively away from or closer together, thereby adjusting the length of the entire diagonal brace 5. During installation, the verticality of the air-raid shelter door frame 2 can be adjusted using inspection equipment such as a plumb line to ensure that the installation verticality of the air-raid shelter door frame 2 meets the construction requirements. The adjustment process only requires rotating the nut rotating sleeve 54, without the need for vertical lifting equipment. Before the formwork is installed and the concrete is poured and reaches initial set, the air-raid shelter door can be dynamically fine-tuned to further ensure the verticality of the air-raid shelter door frame 2 and avoid the problem of the air-raid shelter door being difficult to open and close or even unusable due to excessive tilt of the door frame.

[0026] This invention can be used in the field of low-carbon fixing devices for civil defense door frames, and can also be applied to other fields of this invention.

[0027] Example 2: This example is a further improvement on the previous example: see [link / reference] Figure 1 and Figure 3As shown, it also includes channel steel 7. Two channel steel 7s pass through the inner side of the lower frame of the air-raid shelter door frame 2 near the two corners, with the bottom of the channel steel 7 tightly against the inner side of the lower frame of the air-raid shelter door frame 2. Before inserting the channel steel 7 into the air-raid shelter door frame 2, multiple sets of fixing rods 8 need to be pre-embedded at predetermined positions on the inner and outer sides of the air-raid shelter door frame 2. Each set of fixing rods 8 consists of two symmetrically arranged rods, and the reserved distance between the two fixing rods 8 is consistent with the width of the channel steel 7. This ensures that after the channel steel 7 passes through the air-raid shelter door frame 2, the fixing rods 8 on the inner and outer sides will abut and limit the channel steel 7, allowing the channel steel 7 to be positioned precisely between the two fixing rods 8.

[0028] See Figure 1 and Figure 3 As shown, the top of the fixing rod 8 extends upwards, and its height is higher than the positioning height of the channel steel 7 on the air-raid shelter door frame 2. To facilitate the fixing of the channel steel 7, a threaded section 81 is provided at the top of the fixing rod 8, and the length of the threaded section 81 is 8-12cm, preferably 10cm. A clamping plate 9 is also provided, with two symmetrical holes I91 on its top. The clamping plate 9 is fitted onto the fixing rod 8 through holes I91, so that the bottom of the clamping plate 9 presses against the top of the channel steel 7. Finally, the clamping plate 9 is locked by the matching nut and the threaded section 81, thus fixing the channel steel 7 and pressing it firmly against the lower frame of the air-raid shelter door frame 2. This design effectively prevents displacement of the lower part of the air-raid shelter door frame 2 when subjected to external forces such as concrete thrust. At the same time, the diagonal bracing rods 5 are used to fix and tighten the four corners of the inner and outer sides of the upper frame of the air defense door frame 2, which can effectively prevent the overall position of the air defense door frame 2 and the tilting of the upper and lower parts in the plane when subjected to different external forces, ensuring that the air defense door will not have difficulty in opening or closing after installation.

[0029] See Figure 3 and Figure 4As shown, the channel steel 7 is preferably an I-beam, with two symmetrical slotted holes 71 on both sides of the bottom edge. To secure the inner and outer sides of the lower frame of the air-raid shelter door 2, two symmetrical positioning angle steels 10 are also provided at the bottom of the channel steel 7. The bent surfaces of the two positioning angle steels 10 face outwards and are secured to the inner and outer sides of the lower frame of the air-raid shelter door 2. Two symmetrical holes II 101 are provided at the top of each of the two positioning angle steels 10 for inserting the fixing bolts 11. After the channel steel 7 is fixed by the cooperation of the fixing rod 8 and the clamping plate 9, the positioning angle steels 10 are inserted into the fixing bolts 11 and attached to the bottom of the channel steel 7. Simultaneously, the fixing bolts 11 are passed upwards through the slotted holes 71 and secured with washers and matching nuts. The two positioning angle steels 10 are fixed in the same way, thus completing the secure positioning of the inner and outer sides of the lower frame of the air-raid shelter door 2. This design eliminates the need to weld the lower frame of the civil defense door frame 2 to the ground beam reinforcement. With the help of the diagonal bracing rod 5, the fixed strength of the civil defense door frame 2 is guaranteed, while avoiding weld damage at the main reinforcement and the civil defense door frame 2, thus ensuring the construction quality of the civil defense door frame 2 and the surrounding reinforcement. On the other hand, the relative position of the positioning angle steel 10 can be adjusted by loosening the fixing bolts 11 to accommodate different thicknesses of the civil defense door frame 2.

[0030] During construction, when the verticality of the air-raid shelter door frame 2 deviates, the overall length of the diagonal brace 5 is adjusted by rotating the nut rotating sleeve 54 according to the data measured by vertical measuring instruments such as a plumb line. By moving the top clamp 6, the upper frame of the air-raid shelter door frame 2 can be moved, thereby adjusting the verticality of the air-raid shelter door frame 2 to the qualified value. When the axial position of the air-raid shelter door frame 2 moves, the fixing bolt 11 connecting the positioning angle steel 10 and the channel steel 7 is loosened. According to the offset position of the air-raid shelter door frame 2, the positioning angle steel 10 is struck with a hammer. The positioning angle steel 10 pushes the air-raid shelter door frame 2 to move. The relative distance between the air-raid shelter door frame 2 and the control line is measured at any time with a tape measure. After adjusting to the appropriate position, the fixing bolt 11 between the positioning angle steel 10 and the channel steel 7 is tightened, thereby tightening the lower frame of the air-raid shelter door frame 2 again.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A low-carbon fixing device for civil defense door frames, characterized in that, include: At least one diagonal brace (5) is provided on the inner and outer sides of the civil defense door frame (2) for supporting the two sides of the civil defense door frame (2), and the length of the diagonal brace (5) can be freely adjusted. The diagonal bracing base (4) is set in accordance with the number of the diagonal bracing rods (5) and is fixed on the ground (1) on the front and rear sides of the civil defense door frame (2) respectively, and is hinged to the bottom end of the diagonal bracing rods (5); At least one top clamp (6) is provided, which is tightly clamped to the inner side of the upper frame of the civil defense door frame (2), and the top ends of the two opposing diagonal braces (5) are hinged to the same top clamp (6) for supporting the civil defense door frame (2). At least one channel steel (7) is provided, which passes through the interior of the civil defense door frame (2) and is close to the inner side of its lower frame. Two sets of positioning parts are symmetrically provided at the bottom of the channel steel (7) for clamping and positioning the lower frame of the civil defense door frame (2). At least two sets of clamping components are provided, which are pre-embedded on the ground (1) on the front and rear sides of the civil defense door frame (2) to clamp and fix the channel steel (7).

2. The low-carbon fixing device for a civil defense door frame as described in claim 1, characterized in that, The diagonal brace (5) includes a symmetrically arranged rod body I (51) and rod body II (52). The ends of rod body I (51) and rod body II (52) that are far apart from each other are respectively hinged to the top clamp (6) and the diagonal brace base (4). The ends of rod body I (51) and rod body II (52) that are close to each other are both fixedly provided with adjusting screws (53). The same nut rotating sleeve (54) is threaded on the two adjusting screws (53).

3. A low-carbon fixing device for a civil defense door frame as described in claim 2, characterized in that, The threads on the two adjusting screws (53) are arranged in opposite directions.

4. A low-carbon fixing device for a civil defense door frame as described in claim 1 or 3, characterized in that, The clamping component includes two fixed rods (8) symmetrically embedded in the ground (1). The top ends of the two fixed rods (8) extend upward and are provided with threaded sections (81). The channel steel (7) is positioned between the two fixed rods (8) and is positioned by contact. The same clamping plate (9) is fitted on the two threaded sections (81). The clamping plate (9) presses the top of the channel steel (7) and locks it with a matching nut.

5. A low-carbon fixing device for a civil defense door frame as described in claim 4, characterized in that, The channel steel (7) is an I-beam.

6. A low-carbon fixing device for a civil defense door frame as described in claim 5, characterized in that, The positioning component includes two positioning angle steels (10) that are symmetrically fixedly connected to the bottom of the channel steel (7). The bent surfaces of the two positioning angle steels (10) face outwards and are tightly bound to the inner and outer sides of the lower frame of the civil defense door frame (2).

7. A low-carbon fixing device for a civil defense door frame as described in claim 6, characterized in that, The positioning angle steel (10) is fixedly connected to the channel steel (7) by at least two fixing bolts (11) with matching nuts.

8. A low-carbon fixing device for a civil defense door frame as described in claim 1, characterized in that, The inclined support base (4) is detachably connected to the foundation plate (3) by bolts. The foundation plate (3) is positioned on the ground (1) on both sides of the front and rear of the civil defense door frame (2).

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