A kind of civil air defense door group butt welding auxiliary device
Patent Information
- Application Number
- CN202522264652.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-10-27
AI Technical Summary
In the existing technology, the clamping structure of the welding assembly of the air defense door cannot be adapted to the different specifications of the components, resulting in inaccurate assembly accuracy. Furthermore, manual adjustment is difficult to ensure the stability of the components during the welding process, which easily leads to uneven weld gaps and post-weld deformation.
The welding auxiliary device, which adopts a multi-stage adjustment structure, includes an adjustment cylinder, an adjustment rod, a threaded rod, and an inner threaded cylinder. Together with the limiting components and auxiliary clamping plates, it can achieve all-round clamping and fixing of the air defense door. The clamping stability and adjustment accuracy are ensured by the universal ball and the return spring.
It improves the assembly precision of air-raid shelter doors, ensures the stability of components during welding, reduces uneven weld gaps and post-weld deformation, and enhances welding quality and production efficiency.
Smart Images
Figure CN224927295U_ABST
Abstract
Description
Technical Field
[0001] This patent relates to the field of welding assistance, specifically a welding assistance device for civil defense door assembly. Background Technology
[0002] In civil defense engineering construction, the quality of welding of civil defense doors, as core protective components, directly determines their protective performance and service life. Civil defense doors are usually composed of large metal components such as door frames and door panels. Welding operations require the assembly and positioning of components before all-position welding is carried out. Therefore, assembly accuracy and clamping stability are key technical challenges. In existing technologies, welding of air-raid shelter doors often relies on traditional tooling frames combined with manual adjustments. On the one hand, the clamping structures of traditional tooling frames are mostly of fixed dimensions, unable to accommodate air-raid shelter door components of different specifications (such as width and thickness). Changing door types requires reassembling and disassembling the tooling, which is not only time-consuming and labor-intensive but also prone to affecting assembly accuracy due to tooling adjustment errors. On the other hand, manual adjustment of the clamping position makes it difficult to ensure the stability of the components during the welding process, especially under welding stress, which can easily cause component displacement, leading to uneven weld gaps and post-weld deformation. Subsequent correction requires additional manpower, increasing production costs and extending the lead time. Therefore, we propose an auxiliary device for welding air-raid shelter door assembly. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the purpose of this patent is to provide an auxiliary device for welding the assembly of civil defense doors.
[0004] The technical solution adopted by this patent to solve its technical problem is: a welding auxiliary device for blast door assembly, including a welding base plate, with adjusting bases mounted on the upper left and right sides of the welding base plate, and two fixing plates mounted on the upper ends of the two adjusting bases, with blast door clamping plates mounted on the opposite side walls of the two fixing plates; an adjusting cylinder is installed on the rear side wall of the fixing plate, the blast door clamping plate is connected to the adjusting cylinder, an adjusting rod is installed inside the adjusting cylinder, a threaded rod is installed at the end of the adjusting rod, and an inner threaded cylinder is screwed to the outside of the threaded rod; auxiliary clamping plates are hinged to the upper and lower ends of the blast door clamping plate, a support rod is installed between the auxiliary clamping plate and the inner threaded cylinder, and hinge seats are installed at both ends of the support rod, with one hinge seat connected to the auxiliary clamping plate and the other hinge seat connected to the inner threaded cylinder.
[0005] Furthermore, the side wall of the adjusting cylinder is provided with limit holes at equal intervals, and the side wall of the adjusting rod is equipped with a limit component, the end of which is engaged in the limit hole.
[0006] Furthermore, the limiting assembly includes a telescopic rod installed on the side wall of the adjusting rod, a universal seat is installed at the end of the telescopic rod, a universal ball is installed inside the universal seat, and the end of the universal ball is engaged in the limiting hole.
[0007] Furthermore, a return spring is fitted on the outside of the telescopic rod, located outside the universal joint and the adjusting rod.
[0008] Furthermore, sliders are installed on both sides of the top of the welding base plate, and grooves are opened on both sides of the bottom of the adjustment base. The adjustment base is installed on the outside of the sliders through the grooves.
[0009] Furthermore, a sliding frame is installed at the top of the welding base plate on the outer wall of the slider, and sliding plates are installed at both ends of the adjusting base, with the sliding plates installed inside the sliding frame.
[0010] Furthermore, a fixing screw hole is provided at the top of the slide plate, and a fixing screw is screwed into the fixing screw hole. The bottom end of the fixing screw is fitted against the inner wall of the slide frame.
[0011] The beneficial effects of this patent are: The device employs a multi-stage adjustment structure consisting of an adjusting cylinder, adjusting rod, threaded rod, and inner threaded cylinder to precisely control the lateral spacing of the clamping plates on the air-raid shelter door. Combined with the linkage design of the auxiliary clamping plate and support rod, it enables omnidirectional clamping and fixation of the door's surface and top and bottom corners. The limiting components (telescopic rod, universal ball joint, and return spring) stably lock the adjusting rod within the limiting hole of the adjusting cylinder, preventing loosening due to vibration or stress during welding. Simultaneously, the cooperation between the universal ball joint and the limiting hole ensures reliable limiting while reducing frictional resistance during adjustment, ensuring adjustment accuracy. This structure effectively solves the problems of clamping misalignment and uneven weld gaps in traditional devices, significantly improving the assembly accuracy of the air-raid shelter door and providing a stable foundation for high-quality welding. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this patent.
[0013] Figure 2 This is a side view of this patent.
[0014] Figure 3 This is a schematic diagram of the limiting component of this patent.
[0015] Figure 4 for Figure 1 Detailed image of point a in the image.
[0016] Explanation of reference numerals in the attached drawings: 1. Welding base; 3. Adjustable base; 4. Fixing plate; 5. Air defense door clamping plate; 6. Auxiliary clamping plate; 7. Slider; 8. Slide groove; 9. Slide frame; 10. Slide plate; 11. Adjusting cylinder; 12. Limiting assembly; 13. Threaded rod; 14. Inner threaded cylinder; 15. Support rod; 16. Limiting hole; 17. Adjusting rod; 18. Telescopic rod; 19. Return spring; 20. Universal seat; 21. Universal ball. Detailed Implementation
[0017] The present patent is further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the patent. Furthermore, it should be understood that after reading the teachings of this patent, those skilled in the art can make various alterations or modifications to this patent, and these equivalent forms also fall within the scope defined by the appended claims.
[0018] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This is a schematic diagram of the structure of this patent. A welding auxiliary device for blast door assembly includes a welding base plate 1. Adjustable bases 3 are mounted on the left and right sides of the upper end of the welding base plate 1. Two fixed plates 4 are mounted on the upper ends of the two adjustable bases 3. Blast door clamping plates 5 are mounted on the opposite side walls of the two fixed plates 4. An adjusting cylinder 11 is installed on the rear side wall of the fixed plate 4. The blast door clamping plate 5 is connected to the adjusting cylinder 11. An adjusting rod 17 is installed inside the adjusting cylinder 11. A threaded rod 13 is installed at the end of the adjusting rod 17. An inner threaded cylinder 14 is screwed to the outside of the threaded rod 13. Auxiliary clamping plates 6 are hinged to both the upper and lower ends of the blast door clamping plate 5. A support rod 15 is installed between the auxiliary clamping plate 6 and the inner threaded cylinder 14. A hinge seat is installed at both ends of the support rod 15. One hinge seat is connected to the auxiliary clamping plate 6, and the other hinge seat is connected to the inner threaded cylinder 14.
[0019] In this technical solution, the welded base plate 1 serves as the core load-bearing foundation of the device. It is made of high-strength alloy steel plate (typically 15-20mm thick), and its surface is milled to ensure flatness (flatness error ≤0.5mm) to prevent deformation of the base plate from affecting the subsequent assembly accuracy. Its top left and right sides are fixed with bolts (bolt specifications M16-M20, spacing 300-400mm), providing two sets of symmetrical mounting reference surfaces for assembling the adjustment base 3. Adjustable base 3: It is a rectangular frame structure (material is the same as the welded base plate). The bottom two sides are pre-set with sliding grooves 8 that are compatible with the slider 7. The top is fixed with two parallel fixing plates 4 by welding or bolt connection (bolt specifications M12-M14). The distance between the two fixing plates 4 is designed according to the common thickness of the air defense door (usually 200-300mm) to ensure that the air defense door clamping plate 5 has enough space for installation and adjustment. The air defense door clamping plate 5 is made of wear-resistant steel plate (surface hardness ≥ HRC30). The plate surface has a pre-set lug for connecting with the adjusting cylinder 11 (the lug hole diameter is adapted to the outer diameter of the adjusting cylinder). It is movably connected to the adjusting cylinder 11 by a pin or bolt, and can move laterally as the adjusting cylinder 11 is adjusted. A 3-5mm thick rubber buffer layer is pasted on the inner side of the clamping plate to avoid scratching the surface of the air defense door components during clamping, and at the same time to enhance friction and prevent the components from sliding. The welding base plate 1 forms a sliding fit with the sliding groove 8 of the adjusting base 3 through the slider 7 at the top. The adjusting base 3 can be moved laterally along the slider 7 to achieve coarse adjustment of the overall spacing of the clamping structures on both sides. The two fixed plates 4 at the top of the adjusting base 3 are linked with the air defense door clamping plate 5 through the adjusting cylinder 11. The fixed plate 4 provides fixed support for the adjusting cylinder 11. The extension and transmission of the adjusting cylinder 11 drives the air defense door clamping plate 5 to achieve longitudinal fine adjustment, finally forming a four-level support and adjustment system of "base plate-base-fixed plate-clamping plate".
[0020] Adjusting cylinder 11: Made of seamless steel pipe (inner diameter fits the outer diameter of adjusting rod 17 with a clearance of ≤0.2mm), one end is fixed to the rear side wall of fixing plate 4 by welding (perpendicular to fixing plate 4), and the other end has an opening for the insertion of adjusting rod 17; limiting holes 16 are evenly spaced on the side wall (the hole diameter is adapted to the diameter of universal ball 21, with a spacing of 10-15mm), which are used to cooperate with limiting component 12 to position adjusting rod 17. Adjusting rod 17: It is a solid round steel rod (the diameter is 0.1-0.2mm smaller than the inner diameter of the adjusting cylinder 11). One end is inserted into the inside of the adjusting cylinder 11, and the other end is fixed coaxially with the threaded rod 13 by welding (coaxiality error ≤0.1mm). The side wall is pre-set with a groove (5-8mm deep) for installing the limiting component 12 to ensure that the limiting component 12 does not protrude from the outer wall of the adjusting rod 17 after installation, so as to avoid affecting the sliding of the adjusting rod 17 in the adjusting cylinder 11. Threaded rod 13 and inner threaded barrel 14: The threaded rod 13 adopts a trapezoidal thread (pitch 3-5mm, accuracy grade 7H), and the inner wall of the inner threaded barrel 14 is machined with a corresponding internal thread, forming a precision thread fit between the two; the outer wall of the inner threaded barrel 14 is pre-set with a lug that connects to the support rod 15 (the lug spacing is adapted to the hinge point of the auxiliary clamping plate 6), and is movably connected to one end of the support rod 15 through the hinge seat. Auxiliary clamping plate 6 and support rod 15: The auxiliary clamping plate 6 is an arc-shaped steel plate (the arc is designed according to the arc of the corner of the air defense door). One end is hinged to the upper and lower ends of the air defense door clamping plate 5 through a hinge (it can rotate 0-90° around the hinge), and the other end is connected to the other end of the support rod 15 through a hinge seat; the support rod 15 is a telescopic rod (length adjustment range 50-100mm), and the hinge seats at both ends adopt a fisheye bearing structure to ensure that the support rod 15 can rotate flexibly when the angle of the auxiliary clamping plate 6 is adjusted; The adjusting rod 17 can slide axially within the adjusting cylinder 11, and is initially positioned by the engagement of the limiting component 12 with the limiting hole 16. The threaded rod 13 at the end of the adjusting rod 17 forms a threaded drive with the inner screw cylinder 14. When the inner screw cylinder 14 is rotated, it moves axially along the threaded rod 13, causing the support rod 15 to extend and retract. The extension and retraction of the support rod 15 pushes the auxiliary clamping plate 6 to rotate around the hinge point of the air defense door clamping plate 5, thereby adjusting the angle of the auxiliary clamping plate 6. Finally, a linkage adjustment system of "adjusting cylinder - adjusting rod - threaded rod - inner screw cylinder - support rod - auxiliary clamping plate" is formed. In some technical solutions, the side wall of the adjusting cylinder 11 is provided with limit holes 16 at equal intervals, and the side wall of the adjusting rod 17 is installed with a limit component 12, the end of the limit component 12 being engaged in the limit hole 16.
[0021] In some technical solutions, the limiting component 12 includes a telescopic rod 18 installed on the side wall of the adjusting rod 17, a universal seat 20 installed at the end of the telescopic rod 18, a universal ball 21 installed inside the universal seat 20, and the end of the universal ball 21 is engaged in the limiting hole 16.
[0022] In this technical solution, the telescopic rod 18 consists of an inner rod and an outer cylinder (the inner rod has a diameter of 8-10 mm, and the inner diameter of the outer cylinder is 0.1-0.2 mm larger than that of the inner rod). One end of the outer cylinder is fixed in the groove on the side wall of the adjusting rod 17 by welding, and one end of the inner rod extends out of the outer cylinder and is welded and fixed to the universal seat 20, which can realize axial extension and contraction of 0-10 mm. Universal seat 20 and universal ball 21: Universal seat 20 is a hemispherical groove structure (the groove radius is 0.1mm larger than the radius of universal ball 21), and is fixed to the inner end of the telescopic rod 18 by welding; universal ball 21 is a solid steel ball (5-8mm in diameter, surface roughness Ra0.8μm), which is embedded in the groove of universal seat 20 and can rotate 360° in the groove. Its end extends out of the outside of universal seat 20 (extending length 2-3mm) to be engaged in the limiting hole 16. Return spring 19: A cylindrical helical spring (wire diameter 1-1.5mm, outer diameter 8-10mm, free length 20-25mm) is fitted between the outer cylinder of the telescopic rod 18 and the universal seat 20. In its natural state, it pushes the universal seat 20 to extend outward, keeping the end of the universal ball 21 in a protruding state. The spring force of the return spring 19 acts on the universal seat 20, pushing the end of the universal ball 21 into the limiting hole 16 of the adjusting cylinder 11, thus fixing the adjusting rod 17 relative to the adjusting cylinder 11. When it is necessary to adjust the position of the adjusting rod 17, press the universal ball 21 towards the adjusting rod 17. The universal ball 21 compresses the return spring 19 and drives the telescopic rod 18 to retract, causing the universal ball 21 to disengage from the limiting hole 16. At this time, the adjusting rod 17 can slide within the adjusting cylinder 11. After adjustment, release the universal ball 21, and the return spring 19 returns to its original position, pushing the universal ball 21 back into the corresponding limiting hole 16, completing the positioning. The flexible rotation of the universal ball 21 within the universal seat 20 reduces the frictional resistance between the universal ball and the limiting hole when the adjusting rod slides, preventing jamming.
[0023] In some technical solutions, a return spring 19 is fitted on the outside of the telescopic rod 18, which is located outside the universal joint 20 and the adjusting rod 17.
[0024] In some technical solutions, sliders 7 are installed on both sides of the top of the welding base plate 1, and grooves 8 are opened on both sides of the bottom of the adjusting base 3. The adjusting base 3 is installed on the outside of the sliders 7 through the grooves 8.
[0025] In this technical solution, the slider 7 and the slide groove 8 are as follows: The slider 7 is a T-shaped or dovetail-shaped structure (made of wear-resistant cast iron with surface quenching treatment) and is fixed to the top two sides of the welding base plate 1 by bolts (parallel to the length direction of the welding base plate 1); The slide groove 8 is a T-shaped or dovetail-shaped groove opened on both sides of the bottom end of the adjusting base 3 (the size is adapted to the slider 7 and the gap is ≤0.1mm). The inner wall of the slide groove 8 is pasted with a polytetrafluoroethylene wear-resistant layer (thickness 1-2mm) to reduce sliding friction. Sliding frame 9 and sliding plate 10: Sliding frame 9 is a rectangular frame structure (welded to the top of the welding base plate 1, located on the outside of the slider 7), with guide grooves machined on the inner wall (matching the thickness of the sliding plate 10); Sliding plate 10 is a rectangular steel plate (thickness 8-10mm), fixed to both ends of the adjusting base 3 by welding, perpendicular to the length direction of the adjusting base 3, inserted into the guide groove of sliding frame 9, and can slide along the guide groove; The top of sliding plate 10 has fixing screw holes (hole diameter M10-M12, spacing 200-300mm) for installing fixing screws (not marked with numbers, specifications match the screw holes). The adjusting base 3 slides with the sliding groove 8 at its bottom, forming a sliding engagement with the slider 7 of the welded base plate 1, thus enabling the lateral movement of the adjusting base 3. Simultaneously, the sliding plates 10 at both ends of the adjusting base 3 are inserted into the sliding frames 9 of the welded base plate 1. The guide grooves of the sliding frames 9 restrict the movement direction of the sliding plates 10, preventing left-right deviation or up-down wobbling during the sliding of the adjusting base 3. This forms a dual positioning structure of "slider-sliding groove" main sliding and "sliding frame-sliding plate" auxiliary guidance. After the adjusting base 3 moves to the target position, the fixing screw is screwed into the fixing screw hole of the sliding plate 10 until the bottom end of the fixing screw is tightly fitted against the inner wall of the sliding frame 9. Friction locks the relative position of the sliding plate 10 and the sliding frame 9, thereby fixing the adjusting base 3. In some technical solutions, the top of the welding base plate 1 is equipped with a sliding frame 9 on the outer wall of the slider 7, and both ends of the adjusting base 3 are equipped with sliding plates 10, which are installed inside the sliding frame 9.
[0026] In some technical solutions, the top of the welding base plate 1 is equipped with a sliding frame 9 on the outer wall of the slider 7, and both ends of the adjusting base 3 are equipped with sliding plates 10, which are installed inside the sliding frame 9.
[0027] Working principle: Overall spacing coarse adjustment: to match the width of the air raid shelter door The slider 7 at the top of the welding base plate 1 and the slide groove 8 at the bottom of the adjusting base 3 form a sliding engagement, pushing the two adjusting bases 3 to move laterally along the slider 7. At the same time, the slide plates 10 at both ends of the adjusting base 3 slide synchronously within the slide frame 9 (ensuring the straightness of the movement). After adjusting the two adjusting bases 3 to a suitable distance according to the width of the fire door to be welded, tighten the fixing screws on the slide plates 10. The adjusting base 3 is locked by the friction between the screws and the inner wall of the slide frame 9, completing the coarse adjustment of the overall clamping structure distance. Fine-tuning of clamping position: Aligning with the welding position of the component ① Lateral fine adjustment: Press the universal ball 21 of the side wall limiting component 12 of the adjusting rod 17 to compress the return spring 19 and the telescopic rod 18, so that the universal ball 21 disengages from the limiting hole 16 of the adjusting cylinder 11, pushes the adjusting rod 17 to slide inside the adjusting cylinder 11, and drives the blast door clamping plate 5 to move laterally; after adjustment, release the universal ball 21, the return spring 19 resets and pushes the universal ball 21 into the corresponding limiting hole 16, locks the adjusting rod 17, and fixes the lateral position of the clamping plate. ② Longitudinal fine adjustment: Rotate the inner screw cylinder 14, and use the thread transmission between the threaded rod 13 and the inner screw cylinder 14 to make the inner screw cylinder 14 move axially along the threaded rod 13, which drives the support rod 15 to extend and retract; the support rod 15 pulls the auxiliary clamping plate 6 to rotate around the hinge point of the air defense door clamping plate 5 through the hinge seat until the auxiliary clamping plate 6 fits against the corner of the air defense door, thus completing the longitudinal clamping and corner fixing of the component and ensuring that the parts to be welded are aligned. Stable clamping welding: ensuring welding accuracy The rubber buffer layer on the inner side of the clamping plate 5 of the air-raid shelter door enhances the friction with the component. The auxiliary clamping plate 6 forms a "ring-like" fixation on the component from the top and bottom sides, preventing the component from shifting due to vibration or stress during the welding process. The rigid cooperation between the adjusting cylinder 11 and the adjusting rod 17, and the locking effect of the limiting component, further ensure the stability of the clamping structure, ultimately providing a precise and stable assembly foundation for welding operations, reducing post-weld deformation and rework.
[0028] It will be apparent to those skilled in the art that this patent is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this patent. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this patent is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this patent. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A welding auxiliary device for assemblies of air-raid shelter doors, comprising a welding base plate (1), characterized in that, The upper left and right sides of the welding base plate (1) are equipped with adjustment bases (3), and the upper ends of the two adjustment bases (3) are equipped with two fixing plates (4). The opposite side walls of the two fixing plates (4) are equipped with human defense door clamping plates (5). An adjusting cylinder (11) is installed on the rear side wall of the fixing plate (4). The air defense door clamping plate (5) is connected to the adjusting cylinder (11). An adjusting rod (17) is installed inside the adjusting cylinder (11). A threaded rod (13) is installed at the end of the adjusting rod (17). An inner threaded cylinder (14) is screwed to the outside of the threaded rod (13). An auxiliary clamping plate (6) is hinged to both the upper and lower ends of the air defense door clamping plate (5). A support rod (15) is installed between the auxiliary clamping plate (6) and the inner threaded cylinder (14). A hinge seat is installed at both ends of the support rod (15). One hinge seat is connected to the auxiliary clamping plate (6), and the other hinge seat is connected to the inner threaded cylinder (14).
2. The auxiliary device for welding assemblies of air-raid shelter doors according to claim 1, characterized in that: The side wall of the adjusting cylinder (11) is provided with equidistant limit holes (16), and the side wall of the adjusting rod (17) is provided with a limit component (12), the end of the limit component (12) being engaged in the limit hole (16).
3. The auxiliary device for welding assemblies of air-raid shelter doors according to claim 2, characterized in that: The limiting component (12) includes a telescopic rod (18) installed on the side wall of the adjusting rod (17), a universal seat (20) is installed at the end of the telescopic rod (18), a universal ball (21) is installed inside the universal seat (20), and the end of the universal ball (21) is engaged in the limiting hole (16).
4. The auxiliary device for welding assemblies of air-raid shelter doors according to claim 3, characterized in that: A return spring (19) is fitted on the outside of the telescopic rod (18) and the outside of the universal joint (20) and the adjusting rod (17).
5. The auxiliary device for welding assemblies of air-raid shelter doors according to claim 1, characterized in that: The welding base plate (1) has sliders (7) installed on both sides of its top end, and the adjustment base (3) has grooves (8) on both sides of its bottom end. The adjustment base (3) is installed on the outside of the slider (7) through the grooves (8).
6. The auxiliary device for welding assemblies of air-raid shelter doors according to claim 5, characterized in that: The top of the welding base plate (1) is located on the outer wall of the slider (7) and a sliding frame (9) is installed. Slide plates (10) are installed at both ends of the adjusting base (3), and the slide plates (10) are installed inside the sliding frame (9).
7. The auxiliary device for welding assemblies of air-raid shelter doors according to claim 6, characterized in that: The top of the slide plate (10) is provided with a fixing screw hole, and a fixing screw (22) is screwed into the fixing screw hole. The bottom end of the fixing screw (22) is fitted to the inner wall of the slide frame (9).