Civil air defense ventilation pipe splicing structure

Abstract

The utility model provides a civil air defense ventilation pipe splicing structure which is characterized in that a lining frame is arranged between adjacent flanges, a base plate extending in the radial direction of the lining frame is fixedly connected to the middle of the outer wall of the lining frame, the lining frame abuts against the inner wall of a pipeline, the base plate is clamped by the adjacent flanges, and connecting plates and ribs are arranged on the outer sides of the flanges for reinforcement. The connecting plate and the base plate are each provided with one-way tooth grooves and abut against the abutting plate, the abutting plate is limited through the limiting mechanism, and therefore the abutting plate can abut against the base plate more stably. By the adoption of the technical scheme, the supporting effect of the flange is effectively enhanced, and the anti-impact and anti-deformation capacity of the flange is improved; after the flange deforms, the flange can be dismantled, temporary sealing is rapidly conducted through the connecting plate, the lining frame, the base plate and the abutting mechanism, and leakage of gas in the pipeline is reduced.

Description

Technical Field

[0001] This utility model relates to the field of civil defense ventilation equipment, specifically to a civil defense ventilation pipe splicing structure. Background Technology

[0002] Civil defense ventilation ducts are an important component of the ventilation system in civil defense projects, primarily used to ensure the safe breathing, air circulation, and protective needs of personnel during wartime or special circumstances. Therefore, sealing requirements must be met during the design and installation of civil defense ventilation ducts. Currently, most ventilation ducts are spliced ​​by using flanges around the pipe edges, adding gaskets between adjacent flanges, and then fixing them with bolts. Furthermore, the "Code for Construction and Acceptance of Civil Air Defense Projects" and the "Code for Acceptance of Construction Quality of Ventilation and Air Conditioning Engineering" stipulate the minimum standards for the installation of civil defense ventilation ducts.

[0003] Chinese utility model patent application number 202222903974.3 discloses a splicing structure for a civil defense ventilation pipe, including a first pipe and a second pipe. Both ends of the first pipe and the second pipe are fixedly connected to sealing rings. Several first fixing blocks and second fixing blocks are fixedly connected to the inner walls of the first pipe and the second pipe near their respective ends. A sleeve is rotatably inserted through one side of the second fixing block, and the sleeve rotatably passes through the corresponding sealing ring. A screw is rotatably inserted through one side of the first fixing block, and the screw rotatably passes through the corresponding sealing ring. A square rod is fixedly connected to one end of the screw near the corresponding sleeve, and the square rod is inserted into the corresponding sleeve.

[0004] The above structure mainly addresses the problem of rubber gaskets hardening and resulting in poor sealing after long-term use, which is a way to compensate for chronic damage. However, civil defense pipelines are ventilation ducts set up for wartime or other special circumstances, and must be quickly repaired or restored to function in emergency situations. Therefore, it is necessary to solve the problems of how to enhance the deformation resistance of its connection parts and how to quickly stop gas leakage after the connection is damaged. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of the aforementioned technologies by proposing a splicing structure for civil defense ventilation pipes. This structure aims to solve the problems of how to enhance the deformation resistance of the connection parts and how to quickly stop gas leakage after the connection is damaged.

[0006] This utility model provides a splicing structure for civil defense ventilation pipes, including a pipe and a flange on the outer wall of the pipe end. Adjacent flanges are fixedly connected, and a sealing gasket is placed between adjacent flanges. An inner lining frame is provided between adjacent flanges, and a gasket extending radially is fixedly connected to the middle of the outer wall of the inner lining frame. The inner lining frame abuts against the inner wall of the pipe, and the gasket is clamped by adjacent flanges.

[0007] A detachable reinforcement mechanism for improving flange support is provided on the outside of the flange. A clamping mechanism is provided on the outer surface of the reinforcement mechanism. The clamping mechanism connects and secures the reinforcement mechanism and the pad. The reinforcement mechanism is provided with a limiting mechanism for limiting the clamping mechanism.

[0008] Preferably, the outer surface of the inner lining frame has symmetrical slots on both sides of the pad, and several limiting strips are fixedly connected in the slots. A rubber pad is provided in the slot, and the rubber pad fits into the slot and the limiting strip. The rubber pad fills the space between the inner lining frame and the inner wall of the pipe.

[0009] Preferably, the reinforcement mechanism includes a connecting plate detachably connected to the outer surface of the flange. The connecting plate is located on the mating side of the flange and the pipe. The connecting plate is fixedly connected with several spaced ribs, which abut against the side of the flange away from the pipe. Both the flange and the pipe have several coaxially corresponding threaded through holes, and the inner liner frame has corresponding threaded blind holes. The connecting plate has waist-shaped through holes at the positions corresponding to the threaded through holes. The connecting plate, flange, and pipe are sequentially connected by bolts, and the ends of the bolts are locked and fixed to the threaded blind holes.

[0010] The rubber pad has an opening that corresponds to a threaded through hole, and the diameter of the opening is larger than the diameter of the threaded through hole.

[0011] Preferably, the clamping mechanism includes an abutment plate, a pad plate, and a connecting plate, all of which have one-way toothed grooves fixedly connected to their surfaces. The toothed grooves on the pad plate are located beyond the flange and their working surfaces point towards the connecting plate. The working surfaces of the toothed grooves on the connecting plate point towards the pad plate. The end of the abutment plate is fixedly connected to a toothed plate, which is parallel to the one-way toothed grooves and the working surfaces of the toothed grooves are engaged with each other.

[0012] Preferably, the limiting mechanism includes two or more parallel locking rods that pass through the rib plate. Each locking rod has a limiting ring fitted to its end. Limiting rods are fixedly connected between the limiting rings. The abutment plate is located near the connecting plate, between the limiting rods and the rib plate. The ends of the limiting rods are threaded, and the limiting rings are secured by nuts fitted to the ends of the limiting rods.

[0013] Compared with existing technologies, it has the following beneficial effects:

[0014] This utility model provides a splicing structure for civil defense ventilation pipes. An inner lining frame is installed between adjacent flanges, and a gasket extending radially is fixedly connected to the middle of the outer wall of the inner lining frame. The inner lining frame abuts against the inner wall of the pipe, and the gasket is clamped by adjacent flanges. Connecting plates and ribs are provided on the outer side of the flanges for reinforcement. Both the connecting plate and the gasket have one-way toothed grooves and are pressed together by an abutment plate. A limiting mechanism is used to limit the abutment plate, making the abutment more stable. Using the above technical solution…

[0015] 1. Effectively strengthens the flange's support effect, improving its impact resistance and deformation resistance;

[0016] 2. After the flange is deformed, it can be removed and a temporary seal can be quickly achieved through the connecting plate, inner liner frame, gasket and clamping mechanism to reduce gas leakage from the pipeline. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a civil defense ventilation pipe splicing structure according to the present invention;

[0019] Figure 2 This is a schematic diagram of the flange and pipe of this utility model;

[0020] Figure 3 This is a schematic diagram of the inner lining frame and pad of this utility model;

[0021] Figure 4 This is a schematic diagram of the adhesive pad of this utility model;

[0022] Figure 5 This is a schematic diagram of the connecting plate and rib plate of this utility model;

[0023] Figure 6 This is a schematic diagram of the reinforcement mechanism of this utility model;

[0024] Figure 7 This is a partially enlarged schematic diagram of part A of the present invention;

[0025] Figure 8 This is a partially enlarged schematic diagram of part B of this utility model.

[0026] In the diagram, the components are: pipe-11; flange-12; bolt-13; gasket-14; threaded through hole-15; inner liner frame-21; slot-211; limit strip-212; rubber gasket-213; threaded blind hole-214; opening-215; pad-22; reinforcing mechanism-3; connecting plate-31; waist-shaped through hole-311; rib plate-32; clamping mechanism-4; abutment plate-41; one-way toothed groove-42; toothed plate-43; limit mechanism-5; locking rod-51; limit ring-52; limit rod-53; nut-54. Detailed Implementation

[0027] To better understand the structure, functional features, and advantages of this utility model, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings:

[0028] Example:

[0029] like Figures 1 to 8 As shown, this utility model provides a splicing structure for a civil defense ventilation pipe, comprising a pipe 11 and a flange 12 located on the outer wall of the end of the pipe 11. Adjacent flanges 12 are fixedly connected, i.e., connected by bolts 13. A sealing gasket 14 is placed between adjacent flanges 12. An inner lining frame 21 is provided between adjacent flanges 12. A gasket 22 extending radially is fixedly connected to the middle of the outer wall of the inner lining frame 21. The inner lining frame 21 abuts against the inner wall of the pipe 11, and the gasket 22 is clamped by the adjacent flanges 12. The "Code for Construction and Acceptance of Civil Air Defense Engineering" and the "Code for Acceptance of Construction Quality of Ventilation and Air Conditioning Engineering" stipulate the minimum spacing for the installation of bolts 13 on the flange 12. The sealing gasket 14 is a rubber gasket, and an opening 215 corresponding to the bolt 13 is provided to allow the bolt 13 to pass through. The gasket 22 is located between two adjacent flanges 12 and is made of metal. The inner liner 21 is located at the connection of two adjacent pipes 11 and fits against the inner wall of the pipe 11. By setting the inner liner 21, the internal support at the pipe 11 interface can be improved.

[0030] The outer surface of the inner liner frame 21 has symmetrical slots 211 on both sides of the pad 22. Several limiting strips 212 are fixedly connected within the slots 211, and rubber pads 213 are placed within the slots 211. The rubber pads 213 fit into the slots 211 and the limiting strips 212, filling the space between the inner liner frame 21 and the inner wall of the pipe 11. The slots 211 and the limiting strips 212 restrict the position of the rubber pads 213. At the connection point between the pipe 11 and the flange 12 via bolts 13, the number of limiting strips 212 can be appropriately increased to reduce deformation of the rubber pads 213 during bolt tightening. The limiting strips 212 are integrally formed with the inner liner frame 21. The rubber pad 213 can be a ring that fits into the inner frame 21, or it can be a straight plate made of multiple pieces spliced ​​together. Splicing multiple pieces can fit better at the corners of the inner frame 21 and reduce gaps. However, the ring is prone to deformation and gaps at the corners because the rubber pad 213 has a certain degree of hardness and elasticity.

[0031] A reinforcement mechanism 3 for improving the support force of flange 12 is detachably connected to the outside of flange 12. A clamping mechanism 4 is provided on the outer surface of reinforcement mechanism 3. The clamping mechanism 4 connects and tightens reinforcement mechanism 3 and pad 22. Reinforcement mechanism 3 is provided with a limiting mechanism 5 for limiting clamping mechanism 4.

[0032] As another embodiment, such as Figures 3 to 6As shown, the reinforcement mechanism 3 of this application includes a connecting plate 31 detachably connected to the outer surface of the flange 12. The connecting plate 31 is located on the mating side of the flange 12 and the pipe 11. The connecting plate 31 is fixedly connected with a number of spaced-apart ribs 32, which abut against the side of the flange 12 away from the pipe 11. The connecting plate 31 is a metal plate, and the flange 12 is a right-angle flange (i.e., the cross-section is at a right angle). The connecting plate 31 is located on the side where the flange 12 and the pipe 11 are in contact, and the ribs 32 are integrally formed with the connecting plate 31. When the connecting plate 31 is connected to the flange 12 and the pipe 11, one side of the rib 32 abuts against the other side of the flange 12, forming a triangular support structure, which can improve the deformation resistance of the flange 12.

[0033] Both flange 12 and pipe 11 have several coaxial threaded through holes 15. The inner liner frame 21 has corresponding threaded blind holes 214. The connecting plate 31 has a waist-shaped through hole 311 at the position corresponding to the threaded through holes 15. The connecting plate 31, flange 12, and pipe 11 are sequentially connected by bolts 13, and the ends of the bolts 13 are locked and fixed to the threaded blind holes 214. The rubber gasket 213 has an opening 215, which corresponds to the threaded through holes 15, and the diameter of the opening 215 is larger than the diameter of the threaded through holes 15.

[0034] During installation, the inner liner frame 21 is placed inside the pipe 11, the flange 12 is placed outside the pipe 11, the connecting plate 31 is fitted with the flange 12, and the bolts 13 pass through the waist-shaped through hole 311 and the threaded through hole 15 in sequence and are locked in the threaded blind hole 214. The bolts 13 are flat-head bolts, and the threaded through hole 15 can be a through hole with no threads on the inner wall. The bolts 13 are threadedly engaged with the threaded blind hole 214.

[0035] As another embodiment, such as Figure 1 and Figure 7 As shown, the clamping mechanism 4 of this application includes an abutment plate 41, a pad plate 22 and a connecting plate 31, all of which are fixedly connected to one-way toothed grooves 42. The toothed grooves 42 on the pad plate 22 are located beyond the flange 12 and their working surfaces point towards the side of the connecting plate 31. The working surfaces of the toothed grooves 42 on the connecting plate 31 point towards the side of the pad plate 22. A toothed plate 43 is fixedly connected to the end of the abutment plate 41. The toothed plate 43 is parallel to the one-way toothed grooves 42 and the working surfaces of the toothed grooves are meshed with each other.

[0036] One side of the unidirectional toothed groove 42 is a right-angled surface, and the other side is an inclined surface, with the right-angled surface being the working surface. The unidirectional toothed groove 42 is integrally formed with the connecting plate 31 and the pad plate 22. The unidirectional toothed groove 42 on the connecting plate 31 is located at both ends. The toothed plate 43 is a plate with toothed grooves that can mesh with the unidirectional toothed groove 42 (the toothed groove is also unidirectional). After the inner liner frame 21 and the pad plate 22 are fixed by bolts 13, the abutment plate 41 and the toothed plate 43 are inserted between the connecting plate 31 and the pad plate 22 and mesh. The abutment plate 41, the pad plate 22, and the connecting plate 31 form a triangular stable structure, effectively reducing the probability of the pad plate 22 loosening due to vibration. For ease of installation, the unidirectional toothed groove 42 on the connecting plate 31 is located at its end.

[0037] As another embodiment, such as Figure 5 and Figure 8 As shown, the limiting mechanism 5 of this application includes two or more parallel locking rods 51 that pass through the rib plate 32. Each locking rod 51 has a limiting ring 52 sleeved at its end. Limiting rods 53 are fixedly connected between the limiting rings 52. The end of the abutment plate 41 near the connecting plate 31 is located between the limiting rod 53 and the rib plate 32. The end of the limiting rod 53 is threaded, and the position of the limiting ring 52 is secured by a nut 54 sleeved on the end of the limiting rod 53. In use, after the pipe 11, flange 12, inner liner frame 21, and connecting plate 31 are fixed by bolts 13, the abutment plate 41 is inserted into the one-way toothed groove 42 between the pad plate 22 and the connecting plate 31 via a toothed plate 43. To improve the abutment stability of the abutment plate 41, the limiting ring 52 is sleeved on the locking rod 51, and the limiting rings 52 are connected by the limiting rod 53. The limiting rod 53 restricts the movement of the abutment plate 41, and the nut 54 is tightened at the end of the locking rod 51 to fit against the limiting ring 52, thereby securing the limiting ring 52.

[0038] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of this utility model without departing from the scope of the technical solution of this utility model shall fall within the protection scope of this technical solution.

Claims

1. A splicing structure of a civil air defense ventilation pipe, comprising a pipe (11) and a flange (12) arranged on the outer wall of the end of the pipe (11), adjacent flanges (12) are fixedly connected, and a sealing gasket (14) is arranged between adjacent flanges (12), characterized in that: An inner lining frame (21) is arranged between adjacent flanges (12), a gusset plate (22) extending in the radial direction is fixedly connected to the middle of the outer wall of the inner lining frame (21), the inner lining frame (21) abuts the inner wall of the pipeline (11), and the gusset plate (22) is clamped by adjacent flanges (12); A reinforcing mechanism (3) for improving the supporting force of the flange (12) is detachably connected to the outer side of the flange (12), a abutting mechanism (4) is arranged on the outer surface of the reinforcing mechanism (3), the abutting mechanism (4) connects and fastens the reinforcing mechanism (3) and the gusset plate (22), and the reinforcing mechanism (3) is provided with a limiting mechanism (5) for limiting the abutting mechanism (4).

2. The air defense ventilation pipe splicing structure according to claim 1, characterized in that, A slot (211) is symmetrically formed on the outer surface of the inner lining frame (21) on both sides of the gusset plate (22), a plurality of limiting strips (212) are fixedly connected in the slot (211), and a rubber pad (213) is arranged in the slot (211), the rubber pad (213) is embedded with the slot (211) and the limiting strip (212), and the rubber pad (213) is filled between the inner lining frame (21) and the inner wall of the pipeline (11).

3. The air defense ventilation pipe splicing structure according to claim 2, characterized in that, The reinforcing mechanism (3) comprises a connecting plate (31) detachably connected to the outer surface of the flange (12), the connecting plate (31) is located on the joint side of the flange (12) and the pipeline (11), a plurality of spaced rib plates (32) are fixedly connected to the connecting plate (31), and the rib plates (32) abut the side of the flange (12) away from the pipeline (11).

4. The air defense ventilation pipe splicing structure according to claim 3, characterized in that, The flange (12) and the pipeline (11) are both provided with a plurality of coaxial corresponding threaded through holes (15), the inner lining frame (21) is provided with a threaded blind hole (214) corresponding to the threaded through hole (15), the connecting plate (31) is provided with a waist-shaped through hole (311) corresponding to the position of the threaded through hole (15), and the connecting plate (31), the flange (12) and the pipeline (11) are sequentially penetrated and connected by bolts (13), and the end of the bolt (13) is locked and fixed with the threaded blind hole (214).

5. The air defense ventilation pipe splicing structure according to claim 3, characterized in that, The abutting mechanism (4) comprises an abutting plate (41), and the surfaces of the gusset plate (22) and the connecting plate (31) are fixedly connected with one-way tooth grooves (42), wherein the tooth grooves (42) on the gusset plate (22) are located beyond the flange (12) and the working surface points to the side of the connecting plate (31), the working surface of the tooth grooves (42) on the connecting plate (31) points to the side of the gusset plate (22), the end of the abutting plate (41) is fixedly connected with a tooth groove plate (43), the tooth groove plate (43) is parallel to the one-way tooth grooves (42) and the working surfaces of the tooth grooves are oppositely engaged.

6. The air defense ventilation pipe splicing structure according to claim 5, characterized in that, The limiting mechanism (5) comprises two or more locking rods (51) which are parallel and pass through the rib plate (32), the end of each locking rod (51) is sleeved with a limiting ring (52), the limiting rings (52) are fixedly connected with a limiting rod (53), the abutting plate (41) is close to one end of the connecting plate (31) and is located between the limiting rod (53) and the rib plate (32).

7. The air defense ventilation pipe splicing structure according to claim 6, characterized in that, The end of the limiting rod (53) is provided with a screw thread, and the position of the limiting ring (52) is fastened by a nut (54) sleeved on the end of the limiting rod (53).

8. The air defense ventilation pipe splicing structure according to claim 4, characterized in that, The rubber pad (213) is provided with an opening (215), the opening (215) corresponds to the threaded through hole (15), and the aperture of the opening (215) is larger than the aperture of the threaded through hole (15).

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