Sealing beam lifting mechanism

Abstract

The application relates to a sealing beam lifting mechanism which comprises a lower transverse beam located on the inner side of a civil air defense door, a vertical beam fixedly connected above the transverse beam and sleeved with a slidable protective sleeve on the outer side, a driving handle composed of an inner handle, an outer handle and a connecting shaft, a connecting rod mechanism containing a main connecting rod structure and a secondary connecting rod structure, and the like, the driving handle is swung to drive the connecting rod mechanism to drive the protective sleeve and the vertical beam to move relative to each other, the transverse beam is lifted, the vertical beam is provided with two sets of connecting rod mechanisms, one set of connecting rod mechanism is arranged on each end of the vertical beam, the lower part of the transverse beam is provided with double-layer stepped installation grooves and sealing rubber strips, and the bottom of the vertical beam is fixed with the transverse beam through a connecting plate provided with height adjusting shims. The application has the technical effects of sealing the space between the civil air defense door and the ground and facilitating installation and maintenance.

Description

Technical Field

[0001] This application relates to the field of civil defense building technology, and in particular to a sealing beam lifting mechanism. Background Technology

[0002] Civil defense buildings are a general term for building projects with civil air defense engineering as a necessary ancillary project. They are mostly manifested in the form of underground garages, and are equipped with the hardware required for wartime shelters, such as civil defense doors, sealing doors, lighting, ventilation, water supply and drainage, communication, and network. The civil defense doors, in particular, have requirements for airtightness.

[0003] When installing a civil defense door, a certain gap needs to be left between its bottom and the ground to ensure the normal opening and closing of the door. This gap needs to be sealed when the door is closed.

[0004] For example, a building structure for civil defense buildings includes a door frame. Two civil defense doors are installed on the inner side of the door frame via an installation structure. A lifting mechanism is provided on one side of each civil defense door. The moving end of the lifting mechanism is connected to the upper surface of a moving base. A sealing element is fixedly installed on the inner side of the moving base by multiple bolts. The bottom end of the door frame is fixedly connected to the upper surface of the ground. Activating two telescopic cylinders causes the telescopic cylinders to extend and retract, moving the connected moving base downwards until the sealing element installed on the inner side of the moving base is in contact with the ground. Guide rods on both sides of the telescopic cylinders and springs fitted onto the outer surface of the guide rods can increase the stability of the sealing element's vertical movement to a certain extent. The rubber layer on the inner side of the two civil defense doors and the sealing element at the bottom effectively ensure the airtightness and safety of people taking refuge inside the civil defense building during wartime.

[0005] The aforementioned technical solution for sealing the lower sealing structure of the air-raid shelter door, which uses a telescopic cylinder to drive the sealing components, lacks rapid operability, has a complex structure, and has a high manufacturing cost. Utility Model Content

[0006] To overcome the above-mentioned technical problems, this application provides a sealing beam lifting mechanism.

[0007] The sealing beam lifting mechanism provided in this application adopts the following technical solution:

[0008] A sealing beam lifting mechanism, comprising:

[0009] A crossbeam, located at the lower part of the inner side of the air-raid shelter door;

[0010] The longitudinal beam has its bottom end fixedly connected to the top of the crossbeam. A protective sleeve is fitted on the outer side of the longitudinal beam. The protective sleeve is slidably connected to the longitudinal beam along its length. A connecting block is provided on the protective sleeve and is fixedly connected to the door panel of the air-raid shelter through the connecting block.

[0011] The drive handle includes an inner handle located inside the door panel and an outer handle located outside the door panel. The inner handle and the outer handle are fixedly connected by a connecting shaft passing through the door panel and are located on the inner and outer sides of the door panel of the air-raid shelter door, respectively.

[0012] The linkage mechanism includes a main linkage structure and a secondary linkage structure. One end of the main linkage structure is hinged to the connecting shaft, and the other end is hinged to the secondary linkage structure. The secondary linkage structure includes a first secondary linkage and a second secondary linkage. One end of the first secondary linkage and the second secondary linkage are hinged to each other and the hinged end is hinged to the main linkage structure. The other ends of the first secondary linkage and the second secondary linkage are respectively hinged to the longitudinal beam and the protective sleeve. By swinging the drive handle, the linkage mechanism is driven to move the protective sleeve and the longitudinal beam relative to each other, thereby causing the crossbeam to rise and fall. When it falls, it seals the bottom seam of the door.

[0013] By adopting the above technical solution and using the drive handle to control the linkage mechanism, the protective sleeve and the longitudinal beam move relative to each other, driving the horizontal beam to rise and fall. This can simply and efficiently form an airtight structure between the bottom plate of the human defense door and the ground, solving the problems of insufficient operability for rapid conversion between peacetime and wartime, complex structure and high manufacturing cost in the existing technology.

[0014] Preferably, the first auxiliary connecting rod is hinged to the upper part of the protective sleeve, and the second auxiliary connecting rod is hinged to the bottom of the longitudinal beam near the cross beam, with the first and second auxiliary connecting rods arranged symmetrically vertically.

[0015] By adopting the above technical solution, the crossbeam is placed at the lower part of the inner side of the air-raid shelter door, the bottom end of the longitudinal beam is fixedly connected to the top of the crossbeam, and a protective sleeve that can slide along its length is fitted on the outer side of the longitudinal beam and connected to the door panel through a connecting block. The drive handle passes through the door panel through the connecting shaft. The linkage mechanism includes a main linkage structure and a secondary linkage structure. One end of the main linkage structure is hinged to the connecting shaft and the other end is hinged to the secondary linkage structure. One end of the first secondary linkage and the second secondary linkage are hinged to each other and the hinged end is hinged to the main linkage structure. The other ends of the first secondary linkage and the second secondary linkage are respectively hinged to the longitudinal beam and the protective sleeve. The swing drive handle can drive the linkage mechanism to move the protective sleeve and the longitudinal beam relative to each other, thereby driving the crossbeam to rise and fall to form an airtight structure. On this basis, the first secondary linkage is hinged to the upper part of the protective sleeve and the second secondary linkage is hinged to the bottom of the longitudinal beam near the crossbeam, and the two are symmetrically arranged, which makes the movement of the linkage mechanism more stable and improves the smoothness and reliability of the crossbeam rising and falling process.

[0016] Preferably, a connecting arm is provided between the connecting shaft and the main connecting rod assembly, and the two ends of the connecting arm are fixedly connected to the hinge point of the main connecting rod assembly and the connecting shaft, respectively.

[0017] By adopting the above technical solution, a connecting arm is set between the connecting shaft and the main connecting rod assembly, with both ends connected to the hinge point of the main connecting rod assembly and the connecting shaft respectively. This enables better force transmission and motion conversion, and improves the driving efficiency and stability of the linkage mechanism.

[0018] Preferably, there are two longitudinal beams, which are respectively located at both ends of the crossbeam, and two sets of linkage mechanisms are provided.

[0019] By adopting the above technical solution, a crossbeam, together with two longitudinal beams and two sets of linkage mechanisms, can drive the crossbeam to rise and fall more stably, enhance the stability of the crossbeam rising and falling process, and thus improve the reliability of forming an airtight structure between the bottom plate of the air-raid shelter door and the ground.

[0020] Preferably, the lower part of the crossbeam is provided with a double-layer mounting groove, and a sealing strip is provided in the mounting groove along the length direction of the mounting groove.

[0021] By adopting the above technical solution, a double-layer installation groove is set at the bottom of the crossbeam and a sealing strip is set along the length of the installation groove, which can further enhance the airtightness between the bottom plate of the civil defense door and the ground, and improve the sealing and safety of the interior of the civil defense building.

[0022] Preferably, the mounting slots are arranged in a stepped manner, with the mounting slot closer to the air-raid shelter door being the first mounting slot and the mounting slot farther away from the air-raid shelter door being the second mounting slot, and the height of the first mounting slot being higher than the height of the second mounting slot.

[0023] By adopting the above technical solution, a double-layer mounting groove is set at the bottom of the crossbeam, and a sealing strip is set in the mounting groove along the length direction. At the same time, the mounting groove is set in a stepped shape, with the height of the first mounting groove being higher than the height of the second mounting groove, which can further improve the airtightness between the bottom plate of the air-raid shelter door and the ground.

[0024] Preferably, the bottom of the longitudinal beam is fixedly connected to the crossbeam via a detachable connecting plate, and the contact surface between the connecting plate and the longitudinal beam is provided with a height adjustment shim.

[0025] By adopting the above technical solution, the detachable connecting plate makes it easy to disassemble and install the longitudinal beam and the transverse beam, facilitates maintenance and replacement of parts, and the height adjustment shim can be adjusted according to the height of the measuring steps, which can prevent the connecting plate and the longitudinal beam from loosening, improve the stability and reliability of the connection, and ensure the overall stability of the sealing beam lifting mechanism.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By swinging the handle, the linkage mechanism is driven to move the protective sleeve and longitudinal beam relative to each other, thereby driving the crossbeam to rise and fall to form an airtight structure between the bottom plate of the air-raid shelter door and the ground, which solves the problem of insufficient operation speed in the existing technology and can quickly achieve sealing;

[0028] 2. The structure is relatively simple, avoiding the complex structure of the sealing solution that uses a telescopic cylinder to drive the sealing components in the existing technology, thus reducing manufacturing costs;

[0029] 3. A double-layer mounting groove is set at the bottom of the crossbeam and a sealing strip is installed, which further improves the sealing performance of the lower part of the inner side of the air-raid shelter door and solves the problem of reduced airtightness caused by gaps in the existing technology. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a sealing beam lifting mechanism when the crossbeam rises.

[0031] Figure 2 This is a schematic diagram of the structure of a sealing beam lifting mechanism when the crossbeam descends.

[0032] Explanation of reference numerals in the attached drawings: 1. Crossbeam; 11. Mounting slot; 111. First mounting slot; 112. Second mounting slot; 12. Sealing strip; 2. Longitudinal beam; 21. Protective sleeve; 211. Connecting block; 22. Connecting plate; 23. Height adjustment shim; 3. Drive handle; 31. Inner handle; 32. Outer handle; 33. Connecting shaft; 331. Connecting arm; 4. Linkage mechanism; 41. Main connecting rod structure; 42. Secondary connecting rod structure; 421. First secondary connecting rod; 422. Secondary connecting rod. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0034] This application discloses a sealing beam lifting mechanism. (Refer to...) Figure 1 , Figure 2The sealing beam lifting mechanism includes a crossbeam 1, a longitudinal beam 2, a drive handle 3, and a linkage mechanism 4. The crossbeam 1 is located at the lower part of the inner side of the air-raid shelter door. The bottom end of the longitudinal beam 2 is fixedly connected to the upper part of the crossbeam 1. A protective sleeve 21 is fitted onto the outer side of the longitudinal beam 2, and the protective sleeve 21 is slidably connected to the longitudinal beam 2 along its length. The protective sleeve 21 is fixedly connected to the air-raid shelter door panel via a connecting block 211. The drive handle 3 includes an inner handle 31 and an outer handle 32, which are fixedly connected by a connecting shaft 33 passing through the door panel and located on the inner and outer sides of the door panel, respectively. One end of the main connecting rod structure 41 of the linkage mechanism 4 is hinged to the connecting shaft 33, and the other end is connected to the auxiliary connecting rod. Structure 42 is hinged. The first auxiliary link 421 and the second auxiliary link 422 of the auxiliary link structure 42 are hinged to each other at one end and the hinged end is hinged to the main link structure 41. The other ends of the first auxiliary link 421 and the second auxiliary link 422 are respectively hinged to the longitudinal beam 2 and the protective sleeve 21. By swinging the drive handle 3, the linkage mechanism 4 can be driven to move the protective sleeve 21 and the longitudinal beam 2 relative to each other, thereby driving the crossbeam 1 to rise and fall to form an airtight structure between the bottom plate of the air-raid shelter door and the ground. In this way, compared with the traditional solution of telescopic cylinder driving the sealing parts, the operation is simpler and faster, the structure is also simpler, and the manufacturing cost and later maintenance cost are reduced.

[0035] Specifically, the crossbeam 1 is generally long and narrow, and its material can be high-strength steel, which has good compressive and bending resistance. In some special environments, lightweight metal materials such as aluminum alloy can also be used to reduce the overall weight. The main function of the crossbeam 1 is to serve as the main sealing component, forming a sealed structure in contact with the ground.

[0036] The longitudinal beam 2 can also be made of steel or aluminum alloy. The longitudinal beam 2 is set as a square tube structure, and the protective sleeve 21 is fitted on the outside of the longitudinal beam 2 and is slidably connected to the longitudinal beam 2. The connecting block 211 is a plate welded to the protective sleeve 21 and is fixedly connected to the door panel of the air-raid shelter door by screws. At least two connecting blocks 211 are set along the longitudinal direction of the protective sleeve 21, so that the connection between the protective sleeve 21 and the door panel is more stable.

[0037] The inner handle 31 and outer handle 32 of the drive handle 3 are generally made of cast iron or stainless steel, making them sturdy and durable. The connecting shaft 33 can be a solid metal shaft, and the part passing through the door panel needs to be sealed to prevent dust and water from entering the door panel. The connecting shaft 33 is fixed to the inner handle 31 and outer handle 32 by key connection or welding to ensure that the three can rotate synchronously.

[0038] The main connecting rod structure 41 and the secondary connecting rod structure 42 of the linkage mechanism 4 are typically composed of metal rods, such as carbon steel rods. The hinge joint between the main connecting rod structure 41 and the connecting shaft 33 can be connected using bearings to reduce friction during rotation. The first secondary connecting rod 421 and the second secondary connecting rod 422 of the secondary connecting rod structure 42 must be designed to ensure their strength and rigidity to withstand the forces generated during movement. The hinge joint between the first secondary connecting rod 421 and the second secondary connecting rod 422 can be a pin connection, which is flexible and reliable.

[0039] When the drive handle 3 is swung, the connecting shaft 33 rotates accordingly, driving the main connecting rod structure 41 to move. The movement of the main connecting rod structure 41 is then transmitted to the secondary connecting rod structure 42. Since the first secondary connecting rod 421 and the second secondary connecting rod 422 are hinged to the longitudinal beam 2 and the protective sleeve 21 respectively, the protective sleeve 21 slides along the length of the longitudinal beam 2, simultaneously driving the longitudinal beam 2 to move together, ultimately achieving the raising and lowering of the crossbeam 1. This method of transmitting power through the linkage mechanism 4 can convert the swing of the drive handle 3 into the linear motion of the crossbeam 1, making operation simple and efficient.

[0040] The first connecting rod 421 is hinged to the upper part of the protective sleeve 21, and the second connecting rod 422 is hinged to the bottom of the longitudinal beam 2 near the crossbeam 1. The first and second connecting rods 421 and 422 are symmetrically arranged vertically. This symmetrical arrangement makes the linkage mechanism 4 more stable and distributes force more evenly during movement, enabling it to better drive the crossbeam 1 to achieve smooth lifting and lowering. At the same time, it avoids component damage caused by uneven force distribution, extending the service life of the linkage mechanism 4.

[0041] A connecting arm 331 is provided between the connecting shaft 33 and the main connecting rod assembly. The two ends of the connecting arm 331 are fixedly connected to the hinge point of the main connecting rod assembly and the connecting shaft 33, respectively. The connecting arm 331 is generally made of steel plate or steel pipe. Its function is to increase the distance between the connecting shaft 33 and the main connecting rod assembly, change the direction and magnitude of force transmission, so that the drive handle 3 can more effectively drive the linkage mechanism 4 to move when swinging, thereby improving the transmission efficiency of the entire mechanism.

[0042] Two longitudinal beams 2 are configured, one at each end of the crossbeam 1, and two sets of linkage mechanisms 4 are also provided. This layout makes the crossbeam 1 more stable during lifting and lowering, with even force distribution on both sides, avoiding tilting or swaying. The two sets of linkage mechanisms 4 can operate simultaneously, enhancing the power and stability of the crossbeam 1's lifting and lowering, and ensuring the effective formation of the airtight structure.

[0043] A double-layer mounting groove 11 is provided at the lower part of the crossbeam 1, and a sealing strip 12 is provided along the length of the mounting groove 11. The design of the double-layer mounting groove 11 increases the reliability of the seal, and the two layers of sealing strips 12 can better prevent the ingress of air and dust. The mounting groove 11 is generally manufactured in the lower part of the crossbeam 1 by milling or other machining processes.

[0044] The mounting grooves 11 are arranged in a stepped shape. The mounting groove 11 closer to the air-raid shelter door is the first mounting groove 11111, and the mounting groove 11 farther away from the air-raid shelter door is the second mounting groove 11211. The height of the first mounting groove 11111 is higher than that of the second mounting groove 11211. This stepped design allows the sealing strip 12 to form different sealing layers after installation, further improving the sealing effect. The depth and width of the first mounting groove 11111 and the second mounting groove 11211 can be reasonably designed according to the dimensions of the sealing strip 12.

[0045] The sealing strip 12 consists of an inner rigid substrate and an outer elastic filler layer. The inner rigid substrate can be made of materials such as hard rubber or plastic, providing a certain degree of support and shape retention; the outer elastic filler layer can be made of materials with good elasticity, such as soft rubber, which can deform when in contact with the ground to fill gaps and achieve a better sealing effect.

[0046] The bottom of the longitudinal beam 2 is fixedly connected to the crossbeam 1 via a detachable connecting plate 22. A height adjustment shim 23 is provided on the contact surface between the connecting plate 22 and the longitudinal beam 2. The detachable connecting plate 22 facilitates the installation and disassembly of the longitudinal beam 2 and the crossbeam 1, making future maintenance and replacement easier. The height adjustment shim 23 can be a spring washer or a locking washer, which prevents the bolts between the connecting plate 22 and the longitudinal beam 2 from loosening, ensuring the stability and reliability of the connection.

[0047] The implementation principle of the sealing beam lifting mechanism in this application embodiment is as follows: through the coordinated work of components such as the drive handle 3 and the linkage mechanism 4, the lifting of the crossbeam 1 is achieved, thereby forming an airtight structure between the bottom plate of the air-raid shelter door and the ground. Compared with the prior art, this solution is simple to operate, requires no complex telescopic cylinders or other equipment, and improves the speed of sealing operations. At the same time, the structure is simpler, reducing the number of parts, manufacturing costs, and maintenance difficulties. The reasonable design and coordination between the components, such as the symmetrical arrangement of the linkage mechanism 4, the use of the connecting arm 331, the design of the double-layer mounting groove 11 and the sealing strip 12, further improve the performance and reliability of the entire device, providing an effective solution for sealing air-raid shelter buildings.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sealing beam lifting mechanism, characterized in that: A crossbeam (1) is located at the lower part of the inner side of the air-raid shelter door; The longitudinal beam (2) is fixedly connected to the top of the cross beam (1) at its bottom end. A protective sleeve (21) is fitted on the outside of the longitudinal beam (2). The protective sleeve (21) is slidably connected to the longitudinal beam (2) along the length direction of the longitudinal beam (2). A connecting block (211) is provided on the protective sleeve (21), and it is fixedly connected to the door panel of the air-raid shelter through the connecting block (211). The drive handle (3) includes an inner handle (31) located inside the door panel and an outer handle (32) located outside the door panel. The inner handle (31) and the outer handle (32) are fixedly connected by a connecting shaft (33) passing through the door panel and are located on the inner and outer sides of the door panel of the air-raid shelter door. The linkage mechanism (4) includes a main linkage structure (41) and a secondary linkage structure (42). One end of the main linkage structure (41) is hinged to the connecting shaft (33), and the other end is hinged to the secondary linkage structure (42). The secondary linkage structure (42) includes a first secondary linkage (421) and a second secondary linkage (422). One end of the first secondary linkage (421) and the second secondary linkage (422) are hinged to each other, and the hinged end is hinged to the main linkage structure (41). The other ends of the first secondary linkage (421) and the second secondary linkage (422) are respectively hinged to the longitudinal beam (2) and the protective sleeve (21). By swinging the drive handle (3), the linkage mechanism (4) is driven to move the protective sleeve (21) and the longitudinal beam (2) relative to each other, thereby driving the crossbeam (1) to rise and fall. When it falls, it seals the bottom seam of the door.

2. The sealed beam lifting mechanism of claim 1, wherein: The first auxiliary connecting rod (421) is hinged to the upper part of the protective sleeve (21), and the second auxiliary connecting rod (422) is hinged to the bottom of the longitudinal beam (2) near the cross beam (1). The first auxiliary connecting rod (421) and the second auxiliary connecting rod (422) are arranged symmetrically in the upper and lower parts.

3. The sealed beam lifting mechanism of claim 2, wherein: A connecting arm (331) is provided between the connecting shaft (33) and the main connecting rod assembly. The two ends of the connecting arm (331) are fixedly connected to the hinge point of the main connecting rod assembly and the connecting shaft (33), respectively.

4. The sealed beam lifting mechanism of any one of claims 1-3, wherein: The longitudinal beam (2) is provided in two parts, and the two longitudinal beams (2) are respectively provided at both ends of the crossbeam (1). The linkage mechanism (4) is provided in two sets.

5. The sealed beam lifting mechanism of claim 1, wherein: The lower part of the crossbeam (1) is provided with a double-layer mounting groove (11), and a sealing strip (12) is provided in the mounting groove (11) along the length direction of the mounting groove (11).

6. The sealed beam lifting mechanism of claim 5, wherein: The mounting slots (11) are arranged in a stepped manner. The mounting slot (11) closer to the air defense door is the first mounting slot (111)(11), and the mounting slot (11) farther away from the air defense door is the second mounting slot (112)(11). The height of the first mounting slot (111)(11) is higher than the height of the second mounting slot (112)(11).

7. The sealed beam lifting mechanism of claim 1, wherein: The bottom of the longitudinal beam (2) is fixedly connected with the cross beam (1) through a detachable connecting plate (22), and the contact surface of the connecting plate (22) with the longitudinal beam (2) is provided with a height adjusting gasket (23).

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