Convenient dismounting structure of net cover

Abstract

The application discloses a convenient dismounting structure of a mesh cover, which comprises elastic sheets, nuts and non-standard bolts, the elastic sheets and the nuts are fixedly installed in the four peripheral turnups of a filter box body, the non-standard bolts are rotatably installed on the mesh cover, the nuts are arranged in the elastic sheets, the upper end of the elastic sheet is a deformation part, the lower end is a fixed part, the deformation part expands to both sides under the action of a supporting force and restores the initial state after the supporting force disappears, one end of the non-standard bolt is rotatably connected with the mesh cover, the other end penetrates through the nut and supports the deformation part of the elastic sheet and can be positioned on the deformation part. The application is simple to operate, reduces the dismounting difficulty, improves the operation safety and reduces the labor cost.

Description

Technical Field

[0001] This invention relates to a convenient disassembly and assembly structure for a mesh cover, belonging to the field of air purification technology. Background Technology

[0002] There is a type of filtration equipment that is installed on the ceiling, such as... Figure 1 The equipment is equipped with lifting lugs and is then suspended by lifting rods. One end of the equipment's outlet is clipped onto the ceiling panel. Below, a perforated or louvered mesh cover is fixed to the filtration equipment with four screws (larger mesh covers may require six or more). Specifically, round holes are made around the mesh cover. During installation and disassembly, bolts are passed through the round holes and then tightened into nuts, which are fixed to the housing. This secures the mesh cover in place.

[0003] Currently, the installation of mesh covers in the industry is carried out in the manner described above. This design presents many inconveniences during actual installation and removal. Because the mesh covers are fixed to the ceiling, typically at a height of 3 meters or higher, a stepladder is required for installation and removal. Furthermore, the filters may need to be replaced more than every six months, resulting in frequent installation and removal of the mesh covers. In addition, the number of mesh covers used in various locations is often large, ranging from hundreds to thousands, making installation a significant part of the workload.

[0004] The main drawbacks are as follows:

[0005] (1) Difficult to operate and high difficulty of operation. Often, one person can climb up the A-frame ladder to operate, but if two adults climb up, it will be very crowded, and after a certain height, the operation will become more dangerous. However, the material of the mesh cover is generally made of cold-rolled steel plate or stainless steel. The weight of a single adult is difficult to lift with one hand. When one person is using a screwdriver to remove the screws, it is impossible to lift the mesh cover with the other hand. Moreover, after the person removes the two bolts in front of him, he cannot reach the bolts behind his head and needs to turn around to remove them, which is very awkward. Another person also needs to hold the mesh cover up at all times to prevent it from falling. The whole process is very difficult and cannot be completed by one person. The space is narrow and the operation is high.

[0006] (2) High risk. It requires climbing a ladder and looking up to work, and the net is very heavy. At the same time, the workers need to take turns tightening and loosening the bolts with screwdrivers. Otherwise, one person will not be able to reach all the bolts. Otherwise, they will have to twist their bodies to work. When two people are working on the ladder, it is easy to fall. Furthermore, if the hand slips and does not hold the net, it will fall from the head and hit the facial organs, which is even more dangerous.

[0007] (3) High labor costs. Because it is difficult to install by a single person, at least two people are required to work together, and if necessary, one person needs to be below to catch the net cover, so the labor costs increase by more than double. Summary of the Invention

[0008] The purpose of this invention is to provide a convenient assembly and disassembly structure for a mesh cover, which solves the problem of requiring two people to climb a ladder at the same time. It enables a single person to climb the ladder to work, while avoiding the risk of the mesh cover having to be constantly held up and falling, thus increasing the safety of the operation.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0010] On one hand, the present invention provides a convenient disassembly and assembly structure for a mesh cover, which includes a spring, a nut, and a non-standard bolt. The spring and nut are fixedly installed inside the flanges around the filter housing. The non-standard bolt is rotatably installed on the mesh cover. The nut is located inside the spring. The upper end of the spring is a deformable part, and the lower end is a fixed part. The deformable part expands to both sides under the action of a supporting force and returns to its initial state after the supporting force disappears. One end of the non-standard bolt is rotatably connected to the mesh cover, and the other end passes through the nut and can be positioned on the deformable part after opening the deformable part of the spring.

[0011] As a further preferred embodiment of this solution, the opening diameter of the upper deformable portion of the spring sheet in the initial state is smaller than the inner diameter of the nut.

[0012] As a further preferred embodiment of this solution, the upper end of the spring is provided with a V-shaped positioning drag with openings facing both sides, used to hold the top of the non-standard bolt located above it.

[0013] As a further preferred embodiment of this solution, the nut, spring, and filter housing sheet metal are integrated into a single structure.

[0014] As a further preferred embodiment of this solution, the non-standard bolt includes a positioning head at the foremost end, a rod body located below the positioning head, a threaded post located below the rod body, and a bolt cap located below the threaded post. The positioning head is used to open the deformable part of the spring and is restricted to be positioned above the deformable part. The outer surface of the threaded post is provided with threads, which cooperate with the nut for tightening and fixing. The bolt cap has a groove to facilitate the rotation, installation, or removal of the bolt.

[0015] As a further preferred embodiment of this solution, the upper and lower halves of the outer wall surrounding the positioning head are both rounded transition structures.

[0016] As a further preferred embodiment of this solution, the diameter of the rod body is smaller than the diameter of the positioning head, and the diameter of the positioning head is larger than the opening diameter of the upper deformation part of the spring in the initial state and smaller than the inner diameter of the nut.

[0017] On the other hand, the present invention also provides a non-standard bolt, which includes a positioning head at the foremost end, a shank below the positioning head, a threaded post below the shank, and a bolt cap below the threaded post. The upper and lower halves of the outer wall of the positioning head are both smooth transition structures, and the diameter of the positioning head is larger than the diameter of the shank but smaller than the diameter of the threaded post. The outer surface of the threaded post is provided with threads.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] (1) Easy to operate, reducing the difficulty of disassembly and assembly; by pre-installation and pre-disassembly, the action of having to hold the net cover up the whole time is eliminated, so that personnel can disassemble and assemble in a labor-saving and convenient way.

[0020] (2) Improve safety; there is no need to worry about the net falling down, because the existing solutions require one person to hold the net up for a long time. However, the net is heavy and an adult cannot hold it up with one hand for long. Two people need to climb up the A-frame ladder together to work in a narrow space. If it falls, it will hit the head directly.

[0021] (3) Reduce labor costs; the existing disassembly and assembly scheme requires two people to climb the A-frame ladder to carry out the disassembly and assembly work, and one person is needed below to assist. With this scheme, the installation work of at least one person can be reduced.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the existing mesh cover assembly and disassembly structure;

[0024] Figure 2 This is a schematic diagram of the spring and nut mounting structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the non-standard bolt structure of the present invention;

[0026] Figure 4 This is an assembly diagram of the present invention.

[0027] The markings in the diagram are: 1-Filter housing, 2-Mesh cover, 3-Spring, 4-Nut, 5-Deformation part, 6-Fixing part, 7-Non-standard bolt, 8-Positioning head, 9-Rod body, 10-Threaded post, 11-Bolt cap. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0029] This embodiment provides a convenient assembly and disassembly structure for a mesh cover, including a spring plate 3, a nut 4, and a non-standard bolt 7. The nut 4 is disposed inside the spring plate. The upper end of the spring plate 3 is a deformable part 5, and the lower end is a fixed part 6. The deformable part expands to both sides under the action of a supporting force and returns to its initial state after the supporting force is removed. The upper end of the spring plate 3 is provided with a V-shaped positioning drag with openings facing both sides to hold the top of the non-standard bolt 7 located above it. One end of the non-standard bolt 7 is rotatably connected to the mesh cover, and the other end passes through the nut. After the deformation part of the spring sheet is opened, it can be positioned on the deformation part. The non-standard bolt includes a positioning head 8 at the front end, a rod 9 located below the positioning head 8, a threaded post 10 located below the rod 8, and a bolt cap 11 located below the threaded post 10. The positioning head 8 is used to open the deformation part 5 of the spring sheet 3 and is restricted to be positioned above the deformation part 5. The threaded post 10 has threads on its outer surface, which cooperate with the nut 4 for tightening and fixing. The bolt cap 11 has a groove to facilitate the rotation, installation or removal of the bolt.

[0030] The structural design process of this invention is as follows:

[0031] like Figure 1 and 2 This invention adds a specially designed spring clip to the traditional design, securing it to the nut. In this case, the nut, spring clip, and the filter housing sheet metal become a single unit. The spring clip has elastic deformation capability and also provides a certain degree of support, preventing it from easily failing due to deformation. The minimum opening size of the spring clip in its natural state is A, and the minimum passable inner diameter of the nut is C.

[0032] like Figure 3 As shown, a uniquely shaped non-standard bolt was designed. The top of the non-standard bolt is a locating head with a smooth transition between the upper and lower halves, connected to the threaded post below via a thinner shank. The maximum outer diameter of the uppermost locating head is B. The non-standard bolt is fixed to the mesh cover, as shown in the diagram. The bolt and the mesh cover cannot move axially up or down, but they can rotate around the axis without causing axial movement between the bolt and the mesh cover; that is, the bolt can rotate freely.

[0033] like Figure 4 As shown, the non-standard bolt and the mesh cover are integrated. When the mesh cover moves upwards, the locating head on top of the bolt pushes open the spring clip. When the locating head moves above the spring clip, the spring clip exerts a contracting elastic force to hold the bolt head in place, preventing the bolt from falling downwards. At this point, because the mesh cover is connected to the bolt, it is also prevented from falling due to the tension of the bolt. The pre-installation of the mesh cover is now complete. This function is achieved only if: A < B < C.

[0034] After the pre-installation is complete, use a tool to tighten the bolt. At this time, the threaded part of the bolt will be screwed into the nut, and the bolt will continue to move upward without any interference, thus completing the final connection and fixation.

[0035] When disassembling the safety net, first loosen all the bolts on the net. The bolt heads will be held in place by spring clips and cannot be easily removed. Once all bolts are completely loosened, simply grasp the net with both hands and pull downwards to remove it. For installation, first push the net upwards forcefully; it will be held in place by spring clips and will not fall. Then tighten all the bolts.

[0036] In summary, this invention solves the problem of requiring two people to climb a ladder simultaneously for installation. Only one person needs to lift the mesh cover and push it upwards for pre-installation, preventing it from falling. Then, the operator tightens the bolts sequentially. Similarly, to remove the mesh cover, all bolts are loosened first, ensuring it doesn't fall. Finally, the operator pulls the mesh cover downwards with both hands to remove it. Therefore, this invention allows for single-person ladder climbing for installation, avoiding the risks of constantly lifting and dropping the mesh cover, significantly increasing operational safety, reducing installation costs, and improving installation and removal efficiency. It represents a much-needed mesh cover installation solution in the current market.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the scope of protection of the present invention in any way, and all technical solutions obtained by equivalent substitution or other means fall within the scope of protection of the present invention.

[0038] All parts not covered in this invention are the same as or can be implemented using existing technologies.

Claims

1. A convenient assembly and disassembly structure for a mesh cover, characterized in that, The filter includes a spring, a nut, and a non-standard bolt. The spring and nut are fixedly installed inside the flanges around the filter housing. The non-standard bolt is rotatably installed on the mesh cover. The nut is located inside the spring. The upper end of the spring is a deformable part, and the lower end is a fixed part. The upper end of the spring is provided with a V-shaped positioning bracket with openings facing both sides to support the top of the non-standard bolt located above it. The deformable part expands to both sides under the action of supporting force and returns to its initial state after the supporting force disappears. One end of the non-standard bolt is rotatably connected to the mesh cover, and the other end passes through the nut and can be positioned on the deformable part after opening the deformable part of the spring. The non-standard bolt includes a positioning head at the front end, a rod body located below the positioning head, a threaded post located below the rod body, and a bolt cap located below the threaded post. The positioning head is used to open the deformable part of the spring and is restricted to be positioned above the deformable part. The outer surface of the threaded post is provided with threads, which cooperate with the nut for tightening and fixing. The minimum opening size A of the spring in its natural state is less than the maximum outer diameter B of the positioning head and less than the minimum passable inner diameter C of the nut.

2. The convenient assembly and disassembly structure of the mesh cover according to claim 1, characterized in that, The nut, spring, and filter housing sheet metal are an integral structure.

3. The convenient assembly and disassembly structure of the mesh cover according to claim 1, characterized in that, The bolt cap has a groove to facilitate the rotation, installation, or removal of the bolt.

4. The convenient assembly and disassembly structure of the mesh cover according to claim 3, characterized in that, The upper and lower halves of the outer wall of the positioning head are both rounded transition structures.

5. The convenient assembly and disassembly structure of the mesh cover according to claim 3, characterized in that, The diameter of the rod body is smaller than the diameter of the positioning head, and the diameter of the positioning head is larger than the opening diameter of the upper deformation part of the spring in the initial state and smaller than the inner diameter of the nut.

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