Auxiliary positioning mechanism for pre-buried sleeve of air defense protection door frame wall

Abstract

The utility model relates to a kind of auxiliary positioning mechanism of people's air defense protective door frame wall pre-buried sleeve;Including two sets of positioning templates and several pairs of pulling components;Positioning template has several first positioning through-holes, and two sets of positioning templates are fixed on the positive and negative sides of the pouring mold of people's air defense protective door frame wall respectively;Pre-buried sleeve is inside the pouring mold of people's air defense protective door frame wall, and pulling component includes pulling screw rod and two pulling nuts, and pulling screw rod both ends are passed through the first positioning through-hole of pre-buried sleeve inner hole and two sets of positioning templates after being cooperated with pulling nut, and pulling nut is abutted on positioning template. The steel bar binding of door frame wall and the construction of pouring mold are completed, then positioning template and the pouring mold of door frame wall are fixed, pre-buried sleeve is placed in the pouring chamber of pouring mold, and the corresponding pre-buried sleeve is fixed using pulling component, the accurate positioning of pre-buried sleeve is realized, and pulling component can also avoid pre-buried sleeve to be skewed by external force in pouring process.

Description

Technical Field

[0001] This utility model relates to the field of construction technology of civil air defense engineering protective equipment, and in particular to an auxiliary positioning mechanism for pre-embedded sleeves during the pouring of civil air defense protective door frame walls. Background Technology

[0002] The General Technical Standard for Civil Air Defense Protective Equipment (Protective Doors) (RF32001-2025) stipulates that when pouring concrete for the door frame wall of a protective door, sleeves for the installation of components such as hinges, locks, and lifting rings must be pre-embedded around the door opening, and strict tolerance requirements must be placed on the center distance, coaxiality, verticality, and position of the sleeves.

[0003] The existing technology generally adopts an integral mold solution: (1) The mold is a welded integral frame, which is large in size and heavy in weight, and requires a special site for hoisting; (2) The sleeve positioning relies on the fixing holes processed on the template once, and the template cannot be reused for different door opening sizes; (3) One set of molds can only correspond to one door opening specification, and it needs to be remade when changing the type, which is costly and time-consuming; (4) The integral mold has great interference with the on-site steel reinforcement binding and concrete pouring processes, resulting in low efficiency.

[0004] Patent application number CN201721065975.8 relates to a wartime pre-embedded sleeve assembly for civil defense, comprising multiple sleeves clustered together and a water-stop ring. Multiple sleeves share a single water-stop ring. The inner wall of the sleeves is connected to the outer wall of the sleeve via corrugated spring sheets, and a rubber tube layer is provided on the inner wall of the sleeve. The water-stop ring has a first water-stop wing at its upper end, a second water-stop wing in its middle, and a pre-embedded seat extending outwards from its lower end, with multiple positioning holes on the pre-embedded seat. This utility model's wartime pre-embedded sleeve assembly for civil defense is securely and quickly installed, saving space required for installing multiple pipes, reducing the risk of leakage, and allowing the sleeves to move up, down, left, and right, reducing rework caused by pre-embedding errors and effectively saving construction time.

[0005] However, the pre-embedded sleeve assembly in the aforementioned patented technology cannot solve the defects in the existing technology, nor does it provide any technical inspiration for solving the existing problems. Therefore, there is an urgent need for a pre-embedded sleeve auxiliary positioning mechanism that is compatible with general pouring procedures and existing loose-assembled formwork, lightweight, reusable, and has high positioning accuracy. Utility Model Content

[0006] The purpose of this utility model is to provide an auxiliary positioning mechanism for the pre-embedded sleeve of the civil air defense protective door frame wall, so as to solve the problems mentioned in the background art above:

[0007] (1) How to achieve rapid, accurate and interchangeable installation of the pre-embedded sleeve of the protective door frame wall without changing the original steel bar binding and concrete pouring process, and ensure that the sleeve does not shift, tilt or rotate during the entire pouring process.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] An auxiliary positioning mechanism for pre-embedded sleeves in civil air defense protective door frame walls;

[0010] Includes two sets of positioning templates and several pull-out components;

[0011] The positioning template has several first positioning through holes, and the two sets of positioning templates are fixed on the front and back sides of the casting mold of the civil air defense protection door frame wall respectively;

[0012] The pre-embedded sleeve is located inside the casting mold of the civil air defense protective door frame wall. Several tie rods correspond one-to-one with several pre-embedded sleeves of the civil air defense protective door frame wall. The tie rods include tie rods and two tie nuts. The two ends of the tie rods pass through the inner hole of the pre-embedded sleeve and the first positioning through hole of the two sets of positioning templates and then cooperate with the tie nuts. The tie nuts abut against the positioning templates.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] Furthermore, the positioning template includes a top template and two vertical templates. The top template is located on the upper side of the doorway of the casting mold for the civil air defense protective door frame wall, and the two vertical templates are located on both sides of the doorway of the casting mold for the civil air defense protective door frame wall. The top template and the two vertical templates of the positioning template are located at the edge of the doorway.

[0015] Furthermore, the positioning template also includes several extension plates, which are fixedly connected to a vertical template on one side of the doorway. The extension plates are arranged at intervals along the vertical direction, and each extension plate also has a first positioning through hole.

[0016] Furthermore, the positions of several extension plates of the two sets of positioning templates correspond one-to-one, and pre-embedded sleeves are placed between the corresponding extension plates of the two sets of positioning templates.

[0017] Furthermore, the pull assembly also includes several positioning sleeves, the outer wall of which fits the contour of the inner wall of the pre-embedded sleeve, and the positioning sleeve has a second positioning through hole along its central axis for the pull screw to pass through only.

[0018] The tie rod passes through the inner hole of the pre-embedded sleeve, the second positioning through hole of several positioning sleeves, and the first positioning through hole of two sets of positioning templates at both ends, and then engages with the tie nut.

[0019] Furthermore, the positioning sleeve is made of rubber.

[0020] Furthermore, the outer wall of the pre-embedded sleeve extends with several sealing ribs.

[0021] With this structure, the reinforcement binding of the civil air defense protective door frame wall and the construction of the casting mold can be completed first. Then, the positioning template is fixed to the casting mold of the civil air defense protective door frame wall, and the pre-embedded sleeve is placed in the casting chamber of the casting mold. The corresponding pre-embedded sleeve is fixed by the tie rod assembly, which achieves precise positioning of the pre-embedded sleeve. The tie rod assembly also prevents the pre-embedded sleeve from being tilted by external forces during the casting process, ensuring the correct installation of the pre-embedded sleeve after molding. Both the positioning template and the tie rod assembly can be used with existing loosely assembled wooden molds, steel molds, or plywood molds, eliminating the need to make a large integral mold.

[0022] The beneficial effects of the auxiliary positioning mechanism for the pre-embedded sleeve of the civil air defense protective door frame wall are as follows:

[0023] (1) The positioning template adopts a "segmented" structure, which can be matched with any loosely assembled template, eliminating the need to make a huge overall steel mold and saving materials;

[0024] (2) The first positioning through hole has a built-in replaceable stainless steel bushing, which has high hole position accuracy and the template can be reused repeatedly.

[0025] (3) The rigid rubber positioning sleeve in the tie assembly ensures the seal between the sleeve and the template end face, while allowing a small amount of elastic deformation to offset the lateral force generated by vibration.

[0026] (4) The extension plate design can meet the installation requirements of lock boxes of different heights. Only the number and spacing of the extension plates need to be adjusted to adapt to various door opening specifications, realizing "one mold for multiple uses".

[0027] (5) After dismantling, only the screw through hole is left. The loosely assembled template can continue to be used in other parts, improving the template utilization rate.

[0028] (6) The entire installation process does not require large lifting equipment and can be operated by two people, which shortens the construction cycle of the door frame wall. Attached Figure Description

[0029] Figure 1 This is a perspective view of the usage state of an embodiment of the auxiliary positioning mechanism for the pre-embedded sleeve of the civil air defense protective door frame wall.

[0030] Figure 2 This is a perspective view of an embodiment of the auxiliary positioning mechanism for the pre-embedded sleeve of the civil air defense protective door frame wall.

[0031] Figure 3 A perspective view of the pre-embedded sleeve and tie rod assembly in an embodiment of the auxiliary positioning mechanism for the pre-embedded sleeve of the civil air defense protective door frame wall.

[0032] Figure 4 yes Figure 3 The sectional view of the left view. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0034] The terms “vertical,” “horizontal,” “left,” “right,” and similar expressions used in this document are for illustrative purposes only and do not represent the only possible implementation.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] Please see Figures 1 to 4 .

[0037] The auxiliary positioning mechanism for the pre-embedded sleeve of the civil air defense protective door frame wall includes two sets of positioning templates 100 and multiple sets of tie rod components.

[0038] Two sets of positioning templates 100 are fixed to the front and back sides of the casting mold 400 for the civil air defense protective door frame wall, respectively. Each positioning template 100 includes a top template 110, two vertical templates 120, and four extension plates 130. The top template 110 is located above the doorway 410 of the casting mold 400 for the civil air defense protective door frame wall, and has three first positioning through holes. The two vertical templates 120 are located on either side of the doorway 410 of the casting mold 400 for the civil air defense protective door frame wall, and have seven first positioning through holes. All first positioning through holes are inlaid with stainless steel bushings, the outer diameter of which is welded and fixed to the template to ensure the hole position accuracy of the tie rod 310 after multiple disassemblies and reassemblies. The top template 110 is welded and fixed to the two vertical templates 120, and the top template 110 and the two vertical templates 120 of the positioning template 100 are located at the edge of the doorway 410.

[0039] The extension plates 130 of the two sets of positioning templates 100 are welded to the vertical template 120 located on the right side of the door opening 410. The four extension plates 130 are arranged in sequence along the vertical direction. A first positioning through hole is also opened on the extension plate 130. The positions of the four extension plates 130 of the two sets of positioning templates 100 correspond one to one.

[0040] Three embedded sleeves 200 are placed between the top templates 110 of the two sets of positioning templates 100, seven embedded sleeves 200 are placed between the corresponding vertical templates 120 of the two sets of positioning templates 100, and embedded sleeves 200 are also placed between the corresponding extension plates 130 of the two sets of positioning templates 100. All embedded sleeves 200 are located inside the casting mold 400 of the civil air defense protective door frame wall, and multiple sealing ribs 210 extend from the outer wall of the embedded sleeves 200.

[0041] The front and back ends of the pre-embedded sleeve 200 abut against two sets of positioning templates 100, respectively. Multiple sets of tie rod assemblies correspond one-to-one with the multiple pre-embedded sleeves 200 of the civil air defense protective door frame wall. Each tie rod assembly includes a tie rod 310, two positioning sleeves 320, and two tie nuts 330. The positioning sleeves 320 are made of hard rubber, and their outer walls conform to the contour of the inner wall of the pre-embedded sleeve 200. Each positioning sleeve 320 has a second positioning through hole along its central axis, allowing only the tie rod 310 to pass through. The two positioning sleeves 320 are placed inside the pre-embedded sleeve 200. The tie rods 310 pass through the inner holes of the pre-embedded sleeve 200, the second positioning through holes of the two positioning sleeves 320, and the first positioning through holes of the two sets of positioning templates 100 before engaging with the tie nuts 330. The tie nuts 330 abut against the positioning templates 100.

[0042] The positioning template 100 has a first positioning through hole of φ18mm, inlaid with a φ18×φ25×8mm stainless steel bushing and spot-welded around its perimeter. The embedded sleeve 200 is φ60×4mm, 388mm in length, with chamfered ends. The sealing rib 210 is 20×4mm flat steel, double-sided staggered welded. The tie rod 310 is M16×450mm, the positioning sleeve 320 is φ58×8mm nitrile rubber, and the tie nut 330 is M16.

[0043] The installation steps for the auxiliary positioning mechanism of the pre-embedded sleeve of the civil air defense protective door frame wall are as follows:

[0044] a) Complete the reinforcement binding and formwork assembly for splicing and pouring, and reserve a doorway of 410mm;

[0045] b) Attach the two sets of positioning templates 100 to the inside of the scattered casting templates on the front and back sides of the door opening 410 respectively, and temporarily lock them with countersunk screws.

[0046] c) Place the pre-embedded sleeve 200 into the pouring cavity, so that its two ends are respectively attached to the inner side of the two sets of positioning templates 100;

[0047] d) Insert the tie rod 310, positioning sleeve 320, sleeve, positioning sleeve 320 on the other side, positioning template 100 in sequence from one side, and finally tighten the tie nut 330.

[0048] e) Verify the center distance and verticality of all pre-embedded sleeves (200mm), with an error ≤1mm;

[0049] f) Pour concrete and vibrate it;

[0050] g) After the concrete has initially set (approximately 8 hours), the tie rod assembly and positioning template 100 can be removed and reused.

[0051] Following the aforementioned installation steps, and after testing with a total station, the center coordinate deviation of all sleeves was ≤0.8mm, and the verticality deviation was ≤0.5mm, meeting the requirements of RF32001-2025. The template surface showed no deformation after demolding and can be reused.

[0052] The above description is only one embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the principle of the present utility model, and these should also be considered to fall within the protection scope of the present utility model.

Claims

1. An auxiliary positioning mechanism for a pre-embedded sleeve in a civil air defense protective door frame wall, characterized in that: Includes two sets of positioning templates (100) and several pull-out components; The positioning template (100) has several first positioning through holes, and the two sets of positioning templates (100) are fixed on the front and back sides of the casting mold (400) of the civil air defense protection door frame wall respectively; The pre-embedded sleeve (200) is located inside the casting mold (400) of the civil air defense protective door frame wall. Several tie components correspond one-to-one with several pre-embedded sleeves (200) of the civil air defense protective door frame wall. The tie components include tie rods (310) and two tie nuts (330). The two ends of the tie rods (310) pass through the inner hole of the pre-embedded sleeve (200) and the first positioning through hole of the two sets of positioning templates (100) and then cooperate with the tie nuts (330). The tie nuts (330) abut against the positioning templates (100). The positioning template (100) includes a top template (110) and two vertical templates (120). The top template (110) is located on the upper side of the doorway (410) of the casting mold (400) for the civil air defense protective door frame wall. The two vertical templates (120) are located on both sides of the doorway (410) of the casting mold (400) for the civil air defense protective door frame wall. The top template (110) and the two vertical templates (120) of the positioning template (100) are located at the edge of the doorway (410).

2. The auxiliary positioning mechanism for the embedded sleeve of the civil air defense protective door frame wall according to claim 1, characterized in that: The positioning template (100) also includes several extension plates (130), which are fixedly connected to a vertical template (120) on one side of the doorway (410). The extension plates (130) are arranged in sequence at intervals along the vertical direction, and the extension plates (130) also have first positioning through holes.

3. The auxiliary positioning mechanism for the embedded sleeve of the civil air defense protective door frame wall according to claim 1, characterized in that: The positions of several extension plates (130) of the two sets of positioning templates (100) correspond one-to-one, and a pre-embedded sleeve (200) is placed between the corresponding extension plates (130) of the two sets of positioning templates (100).

4. The auxiliary positioning mechanism for the embedded sleeve of the civil air defense protective door frame wall according to claim 1, characterized in that: The pull assembly also includes several positioning sleeves (320), the outer wall of the positioning sleeve (320) fits the inner wall contour of the pre-embedded sleeve (200), and the positioning sleeve (320) has a second positioning through hole along its central axis for the pull screw (310) to pass through only; The tie rod (310) passes through the inner hole of the pre-embedded sleeve (200), the second positioning through hole of several positioning sleeves (320), and the first positioning through hole of two sets of positioning templates (100) at both ends, and then engages with the tie nut (330).

5. The auxiliary positioning mechanism for the embedded sleeve of the civil air defense protective door frame wall according to claim 4, characterized in that: The positioning sleeve (320) is made of rubber.

6. The auxiliary positioning mechanism for the embedded sleeve of the civil air defense protective door frame wall according to claim 1, characterized in that: The outer wall of the pre-embedded sleeve (200) extends with several sealing ribs (210).

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