Smoke prevention and exhaust air pipe convenient to overhaul

Abstract

The smoke prevention and exhaust air pipe convenient to overhaul comprises a main body, an air pipe body is arranged in the middle of the main body, a connecting opening is formed in one end of the air pipe body, a rectangular groove is formed in one side of the connecting opening, an edge layer is arranged at the edge of the rectangular groove, a sealing gasket is installed at the edge layer, a cover plate is installed at the rectangular groove, and the cover plate is connected with the air pipe body. A handle is installed at one end of the cover plate, and an embedded layer is arranged on the back face of the cover plate. The cover plate is arranged at the rectangular groove in a matched mode, the screws at the four corners of the cover plate are detached firstly, then the handle is held by a hand to pull the cover plate outwards, the first connecting rod and the second connecting rod rotate at the connecting position, when the cover plate rotates to one side, the second connecting rod abuts against the edge of the rectangular groove, the metal rod is erected, and the limiting rod is inserted into the square hole. The second connecting rod abuts against the limiting rod, the cover plate is fixed to the position, personnel do not need to hold the cover plate all the time, overhauling personnel do not need to disassemble the whole smoke prevention and exhaust air pipe while overhauling and maintaining are facilitated, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke prevention and exhaust air ducts, in particular to a smoke prevention and exhaust air duct convenient for maintenance. Background Technique

[0002] The smoke prevention and exhaust air duct is a ventilation device used inside buildings, mainly for personnel evacuation and smoke removal in case of emergencies such as fires. This kind of air duct is usually made of metal or composite materials, and is provided with guide vanes inside to increase the air flow efficiency. It is usually installed in corridors, stairwells, basements and other places in buildings where evacuation is required. The smoke prevention and exhaust air duct is an important part of the smoke prevention and exhaust system, and the smoke prevention and exhaust system is composed of devices such as smoke prevention and exhaust air ducts, pipe shafts, fire dampers, door switch devices, supply and exhaust fans, etc. The smoke prevention facilities in high-rise buildings should be divided into mechanical pressurized air supply smoke prevention facilities and natural smoke exhaust facilities with openable external windows.

[0003] However, when the current smoke prevention and exhaust air ducts are installed, multiple monomers are connected end to end and assembled together to form a long strip-shaped pipeline. Therefore, the assembled smoke prevention and exhaust air duct is in a closed state. When problems occur inside, maintenance personnel may need to separately disassemble a certain section of the smoke prevention and exhaust air duct to observe the internal situation and judge where the problem lies. The direct disassembly process is time-consuming and laborious. Content of the Utility Model

[0004] The purpose of the utility model is to provide a smoke prevention and exhaust air duct convenient for maintenance, so as to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A smoke prevention and exhaust air duct convenient for maintenance, including a main body. There is an air duct in the middle of the main body. One end of the air duct is provided with a connection port. A rectangular groove is opened on one side of the connection port. An edge layer is opened at the edge of the rectangular groove. A sealing gasket is installed at the edge layer. A cover plate is installed at the rectangular groove. A handle is installed at one end of the cover plate. An embedding layer is provided on the back of the cover plate. At the same time, a trapezoidal groove penetrating the outer wall is opened at the edge of the embedding layer. A first connecting rod is installed on the inner wall of the rectangular groove. A second connecting rod is installed on one side of the first connecting rod. A cross bar is installed at the bottom of the second connecting rod. At the same time, a support rod is installed at the connection between the second connecting rod and the cross bar. A square hole is opened on the outer wall of one of the second connecting rods. A slot is opened on the outer wall of the air duct. A metal rod is installed in the slot. A U-shaped groove is opened on the metal rod. A limiting rod is installed in the U-shaped groove. A movable groove is opened on the limiting rod.

[0006] Preferably, both ends of the air duct are provided with openings, and the size of one end of the connection port is smaller than that of the other end.

[0007] Preferably, the size of the rectangular groove is larger than that of the cover plate. Meanwhile, the outer shape of the edge layer is stepped, and the gasket is laid on the edge layer.

[0008] Preferably, the sizes of the fitting layer and the edge layer match each other. Meanwhile, the cover plate is attached to the edge layer through the fitting layer.

[0009] Preferably, the trapezoidal grooves correspond to the first connecting rod and the second connecting rod respectively. Meanwhile, the first connecting rod and the second connecting rod are rotatably connected to the trapezoidal grooves.

[0010] Preferably, the bottoms of the first connecting rod and the cross bar are rotatably connected to the inner wall of the rectangular groove. The first connecting rod is located in the middle of the rectangular groove, and the second connecting rod is located near the edge of the rectangular groove.

[0011] Preferably, the size of the square hole is larger than that of the limiting rod. The top of the limiting rod is rotatably connected to the U-shaped groove through a pin shaft, and the pin shaft is located in the movable groove here.

[0012] Preferably, threaded holes are provided at the top corners of the edge layer and the cover plate, and the edge layer and the cover plate are fixedly connected through the threaded holes.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In the present utility model, a rectangular groove is provided on one side of the air duct, and a cover plate is provided in a supporting manner at the rectangular groove. When it needs to be opened, first remove the screws at the four corners of the cover plate, and then hold the handle and pull the cover plate outward. The first connecting rod and the second connecting rod inside rotate at the joints with the main body and the cover plate. When the cover plate rotates to one side, the second connecting rod abuts against the edge of the rectangular groove, and then the metal rod is erected and the limiting rod is inserted into the square hole, so that the second connecting rod with a downward inclination trend abuts against the limiting rod, thereby fixing the cover plate here without the need for personnel to always hold the cover plate, facilitating maintenance by maintenance personnel and without disassembling the entire smoke prevention and exhaust air duct, saving time and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is an unfolded schematic diagram of the present utility model;

[0017] Figure 3 is a schematic diagram of the internal structure of the present utility model;

[0018] Figure 4 is a schematic diagram of the cover plate in the present utility model;

[0019] Figure 5 is Figure 3 an enlarged schematic diagram of part A in

[0020] In the figure: 1. Main body; 2. Air duct; 21. Connection port; 22. Rectangular groove; 23. Edge layer; 24. Sealing gasket; 3. Cover plate; 31. Handle; 32. Fitting layer; 33. Trapezoidal groove; 4. First connecting rod; 5. Second connecting rod; 51. Cross bar; 52. Support rod; 53. Square hole; 6. Slot; 7. Metal rod; 71. U-shaped groove; 8. Limit rod; 81. Movable groove. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-5 , the present invention provides a technical solution: a smoke exhaust and prevention air duct convenient for maintenance, including a main body 1, a air duct 2 is arranged in the middle of the main body 1, a connection port 21 is installed at one end of the air duct 2, a rectangular groove 22 is opened on one side of the connection port 21, an edge layer 23 is opened at the edge of the rectangular groove 22, a sealing gasket 24 is installed at the edge layer 23, a cover plate 3 is installed at the rectangular groove 22, a handle 31 is installed at one end of the cover plate 3, a fitting layer 32 is arranged on the back of the cover plate 3, and a trapezoidal groove 33 penetrating the outer wall is opened at the edge of the fitting layer 32 at the same time. A first connecting rod 4 is installed on the inner wall of the rectangular groove 22, a second connecting rod 5 is installed on one side of the first connecting rod 4, a cross bar 51 is installed at the bottom of the second connecting rod 5, and a support rod 52 is installed at the connection between the second connecting rod 5 and the cross bar 51. A square hole 53 is opened on the outer wall of one of the second connecting rods 5. A slot 6 is opened on the outer wall of the air duct 2, a metal rod 7 is installed in the slot 6, a U-shaped groove 71 is opened on the metal rod 7, a limit rod 8 is installed in the U-shaped groove 71, and a movable groove 81 is opened on the limit rod 8.

[0023] Both ends of the air duct 2 are provided with openings, and the size of one end of the connection port 21 is smaller than that of the other end.

[0024] The size of the rectangular groove 22 is larger than that of the cover plate 3. At the same time, the shape of the edge layer 23 is stepped, and the sealing gasket 24 is laid on the edge layer 23.

[0025] The sizes of the fitting layer 32 and the edge layer 23 are matched, and the cover plate 3 is attached to the edge layer 23 through the fitting layer 32.

[0026] The trapezoidal grooves 33 correspond to the first connecting rod 4 and the second connecting rod 5 respectively, and the first connecting rod 4 and the second connecting rod 5 are rotatably connected to the trapezoidal grooves 33.

[0027] The bottom of the first connecting rod 4 and the cross bar 51 are rotatably connected to the inner wall of the rectangular groove 22. The first connecting rod 4 is located in the middle of the rectangular groove 22, and the second connecting rod 5 is located near the edge of the rectangular groove 22.

[0028] The size of the square hole 53 is larger than that of the limit rod 8. The top of the limit rod 8 is rotatably connected to the U-shaped groove 71 through a pin shaft, which is located in the movable groove 81 here. A magnet can be installed at the bottom of the slot 6 to adsorb the metal rod 7.

[0029] Threaded holes are provided at the top corners of the edge layer 23 and the cover plate 3, and the edge layer 23 and the cover plate 3 are fixedly connected through the threaded holes.

[0030] Working principle: Insert the connection port 21 at one end of the air duct 2 into another air duct 2 to achieve end-to-end connection. When performing maintenance, first remove the screws in the threaded holes at the connection between the cover plate 3 and the rectangular groove 22. At this time, the cover plate 3 is in a loose and movable state. Then, hold the handle 31 by hand and lift the cover plate 3 under the support of the first connecting rod 4 and the second connecting rod 5 to separate it from the rectangular groove 22, and move it backward along the rectangular groove 22 until the second connecting rod 5 abuts against the edge of the rectangular groove 22 and stops. Then, erect the metal rod 7 and rotate the limit rod 8 to a horizontal state, and slide the limit rod 8 along the pin shaft here through the movable groove 81 to a suitable position, so that the limit rod 8 is inserted into the square hole 53. When the air duct 2 is installed, the cover plate 3 is facing downward. Therefore, the square hole 53 of the second connecting rod 5 will interact with the limit rod 8 itself, thereby fixing the cover plate 3 here; when installing, remove the limit rod 8 and retract it into the U-shaped groove 71, press the metal rod 7 into the slot 6, and restore the cover plate 3 to the rectangular groove 22 through the handle 31. When the cross bar 51 and the support rod 52 abut against the inner wall of the rectangular groove 22, the fitting layer 32 and the edge layer 23 are engaged and sealed by the gasket 24, and then the cover plate 3 can be fixed in the rectangular groove 22 by screws.

[0031] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0032] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A smoke exhaust duct that is easy to maintain, comprising a main body (1), characterized in that: An air duct (2) is provided in the middle of the main body (1), a connection port (21) is installed at one end of the air duct (2), a rectangular groove (22) is provided on one side of the connection port (21), an edge layer (23) is provided at the edge of the rectangular groove (22), a sealing gasket (24) is installed at the edge layer (23), a cover plate (3) is installed at the rectangular groove (22), a handle (31) is installed at one end of the cover plate (3), a fitting layer (32) is provided on the back side of the cover plate (3), and a trapezoidal groove (33) penetrating the outer wall is provided at the edge of the fitting layer (32), and a sealing gasket (24) is installed on the inner wall of the rectangular groove (22). A No. 1 connecting rod (4) is provided, a No. 2 connecting rod (5) is installed on one side of the No. 1 connecting rod (4), a cross bar (51) is installed at the bottom of the No. 2 connecting rod (5), and a support rod (52) is installed at the connection between the No. 2 connecting rod (5) and the cross bar (51), a square hole (53) is provided on the outer wall of one of the No. 2 connecting rods (5), a slot (6) is provided on the outer wall of the air duct (2), a metal rod (7) is installed in the slot (6), a U-shaped groove (71) is provided on the metal rod (7), a limit rod (8) is installed in the U-shaped groove (71), and a movable groove (81) is provided on the limit rod (8).

2. The smoke exhaust duct that is easy to maintain according to claim 1 is characterized in that: Both ends of the air duct (2) are provided with openings, and the size of one end of the connecting opening (21) is smaller than that of the other end.

3. The smoke exhaust duct that is easy to maintain according to claim 2 is characterized in that: The size of the rectangular groove (22) is larger than the cover plate (3), and the outer shape of the edge layer (23) is stepped, and the sealing pad (24) is laid on the edge layer (23).

4. The smoke exhaust duct that is easy to maintain according to claim 3 is characterized in that: The sizes of the embedding layer (32) and the edge layer (23) match each other, and the cover plate (3) is attached to the edge layer (23) through the embedding layer (32).

5. The smoke exhaust duct that is easy to maintain according to claim 4 is characterized in that: The trapezoidal groove (33) corresponds to the position of the No. 1 connecting rod (4) and the No. 2 connecting rod (5) respectively, and the No. 1 connecting rod (4) and the No. 2 connecting rod (5) are rotatably connected to the trapezoidal groove (33).

6. The smoke exhaust duct that is easy to maintain according to claim 5 is characterized in that: The bottom of the No. 1 connecting rod (4) and the cross bar (51) are rotatably connected to the inner wall of the rectangular groove (22); the No. 1 connecting rod (4) is located in the middle of the rectangular groove (22); and the No. 2 connecting rod (5) is located near the edge of the rectangular groove (22).

7. The smoke exhaust duct that is easy to maintain according to claim 6 is characterized in that: The size of the square hole (53) is larger than the limiting rod (8), and the top of the limiting rod (8) is rotatably connected to the U-shaped groove (71) via a pin shaft, wherein the pin shaft is located in the movable groove (81).

8. The smoke exhaust duct that is easy to maintain according to claim 7 is characterized in that: Threaded holes are provided at the top corners of the edge layer (23) and the cover plate (3), and the edge layer (23) and the cover plate (3) are fixedly connected via the threaded holes.

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