Protective door frame for civil air defense

Abstract

The utility model provides a kind of civil air defence protective door frame. The civil air defence protective door frame includes: U-shaped frame (1), U-shaped frame (1) has ground segment (2) and underground section (3), and the side of ground segment (2) and underground section (3) connection is provided with fixed hole (4);Bottom frame (5), the length of bottom frame (5) is same with the opening width of U-shaped frame (1);Wood square (6) is set in the top of bottom frame (5), and is fixedly connected with bottom frame (5), and the length of wood square (6) is same with the opening width of U-shaped frame (1);Wood square (6) is provided with connecting hole in length direction both ends, and connecting hole corresponds with fixed hole (4), and is fixedly connected by first bolt (7). According to the civil air defence protective door frame of the utility model, it is simple in structure, convenient to operate, and the puncture position can be positioned quickly and accurately.

Description

Technical Field

[0001] This utility model relates to the technical field of civil defense equipment, and more specifically, to a protective door frame for civil defense. Background Technology

[0002] In the field of civil defense engineering construction, door frames, as the core load-bearing components of the protection system, are directly related to the overall explosion-proof, poison-proof, and airtight performance of the project. Their structural design and processing and installation techniques have always been a key focus of technological research and development in the industry. As modern civil defense projects develop towards larger scale and greater complexity, higher requirements are placed on the size specifications, structural strength, and construction efficiency of door frames. Traditional door frame structures are gradually revealing their insufficient adaptability, and the research and application of new structures also face many technical bottlenecks.

[0003] Currently, most mainstream civil defense door frames adopt a one-piece integrated structure. This structure is formed by integral casting or welding, possessing strong structural integrity and excellent impact resistance, meeting the stringent protection standards of civil defense projects. However, the inherent defects of the one-piece structure are particularly prominent in actual construction: due to the large overall size of the door frame (some large civil defense door frames exceed 3m in height and 2m in width), and the fact that the material is mostly high-strength steel, with a single unit weight often reaching several tons, the handling process requires large lifting equipment. This not only increases the equipment investment cost at the construction site but also places higher demands on the site space. In the confined underground civil defense construction environment, the difficulty of equipment scheduling is significantly increased. At the same time, the installation precision control of the one-piece door frame is difficult, requiring multiple teams to coordinate adjustments. If a positional deviation occurs during installation, the correction operation is cumbersome, which can easily prolong the construction period and affect the overall progress of the project.

[0004] To address the inconvenience of transporting and installing integrated door frames, the industry has gradually explored a U-shaped split door frame structure design. In this design, the U-shaped frame, consisting of two vertical frames and a top horizontal frame, is installed first, followed by the installation of the bottom horizontal frame. This method significantly improves installation efficiency.

[0005] However, practice has shown that, due to the lack of effective support at the open end of the U-shaped frame, the frame will sway back and forth during the processing, manufacturing, transportation and storage of the U-shaped door frame. The vertical frame is prone to deformation that causes it to open outward or tilt inward. Some severe deformations may even cause the frame size to exceed the tolerance range, making it impossible to meet the subsequent installation requirements. Utility Model Content

[0006] The purpose of this invention is to provide a protective door frame for civil defense, which has a simple structure, is easy to operate, and can quickly and accurately locate the puncture point.

[0007] To solve the above-mentioned technical problems, as one aspect of this utility model, a protective door frame for civil defense is provided, comprising:

[0008] The U-shaped frame has an above-ground section and an underground section, and a fixing hole is provided on the side where the above-ground section connects to the underground section;

[0009] The base frame has the same length as the opening width of the U-shaped frame;

[0010] The timber is placed above the bottom frame and fixedly connected to the bottom frame. The length of the timber is the same as the opening width of the U-shaped frame. The timber has connecting holes at both ends along its length, which correspond to the fixing holes and are fixedly connected by the first bolt.

[0011] Furthermore, a fixing box is provided on the side of the bottom frame away from the timber. The fixing box has a first through hole, the bottom frame has a second through hole corresponding to the first through hole, and the timber has a third through hole corresponding to the second through hole. The civil defense protective door frame also includes a second bolt, which passes through the first through hole, the second through hole and the third through hole in sequence, and fixes the fixing box, the bottom frame and the timber together.

[0012] Furthermore, there are multiple fixing boxes, which are arranged at intervals along the length of the bottom frame.

[0013] Furthermore, a lock box is provided on the side of the bottom frame away from the timber, and multiple lock boxes are arranged at intervals along the length of the bottom frame.

[0014] Furthermore, the lock box and the wooden frame are offset in the width direction of the base frame.

[0015] Furthermore, the width of the timber is smaller than the width of the base frame.

[0016] Furthermore, the U-shaped frame is formed by welding multiple sections together.

[0017] Furthermore, the side frames of the U-shaped frame are formed by bending sheet metal parts.

[0018] Furthermore, within the cross-section of the side frame of the U-shaped frame, the side frame includes an L-shaped bent plate, and both sides of the L-shaped bent plate are provided with bent edges, which are bent inward along the side edges.

[0019] Furthermore, bolt holes are provided on each side frame of the U-shaped frame.

[0020] This utility model relates to a protective door frame for civil defense purposes. The U-shaped frame is divided into above-ground and underground sections, with an extended bottom to facilitate the installation and connection of timber and the base frame. Fixing holes are provided on the above-ground section near the underground section, allowing for a secure connection with the timber. The timber connects to the two side frames at the opening of the U-shaped frame, providing support and fixation. Simultaneously, the base frame is fixedly connected to the bottom of the timber, forming a closed U-shaped structure. The timber connects all components related to the door frame into a temporary whole. During processing or transportation, the timber supports and connects the opening of the U-shaped frame, effectively preventing vibration and deformation due to insufficient structural strength at the opening, thus providing effective protection for the U-shaped frame structure. After transportation, the timber can be removed for installation, allowing for the secure installation of the U-shaped frame and base frame. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of a civil defense protective door frame according to an embodiment of the present invention is shown;

[0022] Figure 2 A top view of the protective door frame for civil defense according to an embodiment of the present invention is shown;

[0023] Figure 3 A schematic diagram of the structure of the U-shaped frame according to an embodiment of the present invention is shown;

[0024] Figure 4 A top view of the U-shaped frame according to an embodiment of the present invention is shown;

[0025] Figure 5 A side view of the U-shaped frame according to an embodiment of the present invention is shown.

[0026] Figure 6 A schematic diagram of the timber structure according to an embodiment of the present invention is shown;

[0027] Figure 7 A schematic diagram of the bottom frame of an embodiment of the present invention is shown;

[0028] Figure 8 A top view of the bottom frame of an embodiment of the present invention is shown;

[0029] Figure 9 A schematic diagram of the assembly structure of the bottom frame and the wooden beam according to an embodiment of the present invention is shown;

[0030] Figure 10 A bottom view of the assembly structure of the bottom frame and the wooden beam according to an embodiment of the present invention is shown;

[0031] Figure 11 A side view of the assembly structure of the bottom frame and the wooden beam according to an embodiment of the present invention is shown.

[0032] The attached diagram is labeled as follows: 1. U-shaped frame; 2. Above-ground section; 3. Underground section; 4. Fixing hole; 5. Bottom frame; 6. Timber; 7. First bolt; 8. Fixing box; 9. Second bolt; 10. Lock box; 11. L-shaped bending plate; 12. Bending edge; 13. Bolt hole. Detailed Implementation

[0033] The embodiments of the present invention will be described in detail below, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0034] Please refer to Figures 1 to 11 As shown, according to an embodiment of this application, a protective door frame for civil defense includes: a U-shaped frame 1, which has an above-ground section 2 and an underground section 3, and a fixing hole 4 is provided on the side where the above-ground section 2 connects to the underground section 3; a bottom frame 5, the length of which is the same as the opening width of the U-shaped frame 1; a wooden beam 6, which is disposed above the bottom frame 5 and fixedly connected to the bottom frame 5, and the length of the wooden beam 6 is the same as the opening width of the U-shaped frame 1; the wooden beam 6 has connecting holes at both ends in the length direction, the connecting holes correspond to the fixing holes 4, and are fixedly connected by a first bolt 7.

[0035] In this embodiment, the U-shaped frame 1 is configured as an above-ground section 2 and an underground section 3. The bottom of the U-shaped frame 1 is lengthened to facilitate the installation and connection of the timber 6 and the bottom frame 5. A fixing hole 4 is provided on the side of the above-ground section 2 near the underground section 3, allowing for a fixed connection with the timber 6. This enables the timber 6 to be connected between the two side frames at the opening of the U-shaped frame 1, providing support and fixation for the side frames at the opening. Simultaneously, the bottom frame 5 is fixedly connected to the bottom of the timber 6, thus connecting the bottom frame 5 and the U-shaped frame 1 together to form a closed U-shaped structure. This embodiment utilizes the timber 6 to connect all components related to the door frame into a temporary whole. This allows the protective door frame for civil defense to be connected and supported at the opening of the U-shaped frame 1 during processing or transportation, effectively preventing vibration and deformation of the U-shaped frame 1 due to insufficient structural strength at the opening, and providing effective protection for the structure of the U-shaped frame 1. After transportation is completed, the wooden blocks can be removed during installation, and then the U-shaped frame 1 and the bottom frame 5 can be fixedly installed in the installation position.

[0036] In this embodiment, the length of the underground section 3 is approximately 70mm. This portion will be embedded in the post-cast concrete during the installation of the door frame, improving the stability and reliability of the U-shaped frame 1 installation structure. The length of the underground section 3 can be adjusted as needed.

[0037] The technical solution for the protective door frame used in civil defense achieves multiple key technical effects through the coordinated structural design of "U-shaped frame 1 - bottom frame 5 - timber 6 - first bolt 7": On the one hand, the length of timber 6 is consistent with the opening width of U-shaped frame 1. After being fixed to the bottom frame 5, it is rigidly connected to the fixing hole 4 of the ground section 2 through the first bolt 7, forming "lateral support" at the opening of U-shaped frame 1. This transforms the opening structure into a near-rectangular closed structure, effectively offsetting the welding stress during processing and the vibration impact during transportation. This reduces the micro-deformation rate of U-shaped frame 1 after processing from 8%-12% to below 2%, and the overall deformation rate after transportation from 15%-20%. The weight is reduced to less than 3%, ensuring the structural accuracy of the door frame during installation and solving the problem of easy deformation of existing U-shaped frames. On the other hand, during on-site installation, the door frame can be disassembled into U-shaped frame 1 and bottom frame 5 by removing the first bolt 7. The weight of a single component is significantly reduced compared to the integrated door frame. No large equipment is required, and 2-3 people can complete the transportation in the narrow underground space, simplifying the on-site installation process and improving construction convenience. At the same time, the timber 6 only plays a supporting role during the processing and transportation stage. After being dismantled on-site, it does not participate in the protective stress. The protective stress is mainly borne by the concrete poured for U-shaped frame 1 and bottom frame 5, so it does not affect the overall structural strength of the door frame.

[0038] Timber 6 is a conventional material with low cost and can be reused. The factory does not need to process special clamps and the transportation does not need to customize supports, which can effectively reduce logistics costs and material costs.

[0039] In one embodiment, a fixing box 8 is provided on the side of the bottom frame 5 away from the timber 6. The fixing box 8 is provided with a first through hole, the bottom frame 5 is provided with a second through hole corresponding to the first through hole, and the timber 6 is provided with a third through hole corresponding to the second through hole. The protective door frame for civil defense also includes a second bolt 9. The second bolt 9 passes through the first through hole, the second through hole and the third through hole in sequence, and fixes the fixing box 8, the bottom frame 5 and the timber 6 together.

[0040] The fixing box 8 is located on the side of the bottom frame 5 away from the timber 6. The second bolt 9 passes through the first through hole of the fixing box 8, the second through hole of the bottom frame 5, and the third through hole of the timber 6 in sequence, firmly fixing the three together. On the one hand, this strengthens the connection stability between the bottom frame 5 and the timber 6, preventing relative displacement due to vibration during processing and transportation, and further ensuring the reliability of the lateral support at the opening of the U-shaped frame 1, making the deformation control of the U-shaped frame 1 more precise. On the other hand, since the bottom frame 5 is relatively thin and its structural strength is insufficient, directly locking the bolts to the bottom frame 5 may cause excessive stress and deformation, damaging the bottom frame 5. By setting the fixing box 8, the structural strength of the bottom frame 5 at the connection position can be enhanced, so that the tension of the bolts acts on the fixing box 8. Since the fixing box 8 and the bottom frame 5 are in planar fit, it is not easy to damage the bottom frame 5, thus effectively protecting the bottom frame 5. The assembly and disassembly are convenient due to the sequential bolt connection method, which does not affect the on-site disassembly of the door frame. At the same time, the fixing box 8 is made of compatible steel, which does not add too much weight or weaken the structural strength of the bottom frame 5. This ensures that the bottom frame 5 and the U-shaped frame 1 can still meet the civil defense protection performance requirements after assembly. While improving structural stability, it also takes into account the convenience of construction and the reliability of protection.

[0041] In one embodiment, there are multiple fixing boxes 8, which are arranged at intervals along the length of the bottom frame 5.

[0042] Multiple fixing boxes 8 are arranged at intervals along the length of the base frame 5, which can make the fixing force of the second bolt 9 on the base frame 5 and the wooden block 6 evenly distributed along the length of the base frame 5, avoiding the loosening of the connection caused by local stress concentration, and further improving the overall connection stability of the base frame 5 and the wooden block 6. This provides more reliable lateral support for the opening of the U-shaped frame 1. At the same time, the interval setting of multiple fixing boxes 8 can also avoid excessive weight increase while ensuring the protective effect, taking into account both structural stability and lightweight requirements.

[0043] In one embodiment, a lock box 10 is provided on the side of the bottom frame 5 away from the wooden block 6, and multiple lock boxes 10 are arranged at intervals along the length of the bottom frame 5.

[0044] Multiple lock boxes 10 are arranged at intervals along the length of the side of the bottom frame 5 away from the wooden block 6. After the protective door frame is installed, the lock boxes 10 can be evenly distributed along the length of the bottom frame 5, avoiding uneven deformation of the bottom frame 5 under local stress and enhancing the stability of the bottom frame 5 in conjunction with the door structure.

[0045] The height of the lock box 10 is lower than the height of the fixing box 8. When the bottom of the bottom frame 5 is facing down, the fixing box 8 can support the bottom frame 5, preventing the lock box 10 from bearing the pressure of the bottom frame 5, thus effectively protecting the lock box 10.

[0046] In one embodiment, the lock box 10 and the wooden beam 6 are staggered in the width direction of the base frame 5. This arrangement avoids the use of the wooden beam 6 from affecting the lock box 10 and ensures the structural performance of the lock box 10.

[0047] In one embodiment, the width of the timber 6 is smaller than the width of the bottom frame 5.

[0048] The width of the wooden beam 6 is smaller than the width of the bottom frame 5, which allows for reasonable space to be reserved in the width direction of the bottom frame 5. This facilitates the assembly of other components such as the lock box 10 with the bottom frame 5, and avoids excessive weight redundancy caused by the wooden beam 6 occupying too much of the width space of the bottom frame 5. At the same time, it allows the area of ​​the bottom frame 5 not covered by the wooden beam 6 to distribute the external force, reduce local stress concentration, further improve the overall structural stability of the bottom frame 5, and does not affect the supporting function of the wooden beam 6 for the U-shaped frame 1.

[0049] In one embodiment, the U-shaped frame 1 is formed by welding multiple sections together.

[0050] The U-shaped frame 1 is formed by welding multiple sections. The U-shaped frame 1 can be decomposed according to the structural characteristics, so that each section can adopt a simple structure, reducing the processing difficulty and processing cost, and improving processing efficiency.

[0051] In one embodiment, each side frame of the U-shaped frame 1 is formed by bending sheet metal parts.

[0052] In this embodiment, each side frame of the U-shaped frame 1 is formed by bending sheet metal parts, which is simple in structure and easy to process. Moreover, the bending structure can be used to improve the overall structural strength of the U-shaped frame 1.

[0053] In one embodiment, within the side frame section of the U-shaped frame 1, the side frame includes an L-shaped bending plate 11, and both sides of the L-shaped bending plate 11 are provided with bending edges 12, which are bent inward along the side.

[0054] Within the side frame section of the U-shaped frame 1, the side frame adopts an L-shaped bent plate 11, and both sides are provided with inwardly bent edges 12. This structure forms a basic support frame through the L-shaped bent plate 11. At the same time, the inwardly bent edges 12 can significantly enhance the deformation resistance of the side frame section without increasing the overall thickness of the side frame, thereby improving the overall structural stability of the U-shaped frame. The bent edges 12 can also limit the concrete poured in the L-shaped bent plate 11, thereby forming an effective grout boundary, facilitating on-site concrete pouring, and improving the bonding strength between the U-shaped frame 1 and the concrete.

[0055] In one embodiment, bolt holes 13 are provided on each side frame of the U-shaped frame 1.

[0056] In this embodiment, by providing bolt holes 13 on each side frame of the U-shaped frame 1, bolts can be installed on the side frame through the bolt holes 13 during concrete pouring, so that the bolts extend into the concrete pouring space. This can enhance the toughness and structural strength of the concrete by using the bolts, and also improve the bonding strength between the protective door frame and the concrete by using the combination of the bolts and the concrete, thereby improving the overall structural strength and impact resistance of the protective door frame.

[0057] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A protective door frame for civil defense, characterized in that, include: A U-shaped frame (1) has an above-ground section (2) and an underground section (3), and a fixing hole (4) is provided on the side where the above-ground section (2) connects to the underground section (3); The length of the bottom frame (5) is the same as the opening width of the U-shaped frame (1); A wooden beam (6) is placed above the bottom frame (5) and fixedly connected to the bottom frame (5). The length of the wooden beam (6) is the same as the opening width of the U-shaped frame (1). The wooden beam (6) has connecting holes at both ends in the length direction. The connecting holes correspond to the fixing holes (4) and are fixedly connected by the first bolt (7).

2. The protective door frame for civil defense as described in claim 1, characterized in that, A fixing box (8) is provided on the side of the bottom frame (5) away from the wooden beam (6). The fixing box (8) is provided with a first through hole. The bottom frame (5) is provided with a second through hole corresponding to the first through hole. The wooden beam (6) is provided with a third through hole corresponding to the second through hole. The civil defense protective door frame also includes a second bolt (9). The second bolt (9) passes through the first through hole, the second through hole and the third through hole in sequence, and fixes the fixing box (8), the bottom frame (5) and the wooden beam (6) together.

3. The protective door frame for civil defense as described in claim 2, characterized in that, There are multiple fixing boxes (8), and the multiple fixing boxes (8) are arranged at intervals along the length direction of the bottom frame (5).

4. The protective door frame for civil defense as described in claim 1, characterized in that, A lock box (10) is provided on the side of the bottom frame (5) away from the wooden block (6), and multiple lock boxes (10) are arranged at intervals along the length direction of the bottom frame (5).

5. The protective door frame for civil defense as described in claim 4, characterized in that, The lock box (10) and the wooden block (6) are offset in the width direction of the bottom frame (5).

6. The protective door frame for civil defense as described in claim 1, characterized in that, The width of the wooden block (6) is smaller than the width of the bottom frame (5).

7. The protective door frame for civil defense according to any one of claims 1 to 6, characterized in that, The U-shaped frame (1) is formed by welding multiple sections together.

8. The protective door frame for civil defense according to any one of claims 1 to 6, characterized in that, Each side frame of the U-shaped frame (1) is formed by bending sheet metal parts.

9. The protective door frame for civil defense as described in claim 8, characterized in that, Within the side frame section of the U-shaped frame (1), the side frame includes an L-shaped bending plate (11), and both sides of the L-shaped bending plate (11) are provided with bending edges (12), which bend inward along the side.

10. The protective door frame for civil defense according to any one of claims 1 to 6, characterized in that, Each side frame of the U-shaped frame (1) is provided with bolt holes (13).

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