Fabricated smoke prevention and exhaust air pipe

Abstract

The utility model discloses an assembly type smoke prevention and exhaust air pipe, which belongs to the technical field of smoke prevention and exhaust air pipes and comprises a pipe body, a first flange and a second flange are respectively arranged at two ends of the pipe body, a first insertion hole and a second insertion hole are respectively arranged on the first flange and the second flange, and an installation rod is detachably inserted in the first insertion hole. A clamping rod is hinged to the side wall of the mounting rod, and a guide plate and a supporting block are mounted on the side wall of the first mounting plate. Through the arrangement of the ejector rods, the sliding grooves, the heat conduction rods and the supporting blocks, when two adjacent first flanges and second flanges are staggered, heat generated by friction is transmitted into the sliding grooves through the heat conduction rods, at the moment, ammonia gas in the sliding grooves expands, and air pressure pushes the ejector rods to extend out of the sliding grooves and make contact with the transverse rods; therefore, the pressure of the first flange and the second flange on the sealing gasket can be increased under the action of counter-acting force, shaking between the first flange and the second flange is reduced, and the protection effect on the sealing gasket is improved.

Description

Technical Field

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

[0002] The smoke prevention and exhaust air duct is generally installed at various ventilation openings and is a fire safety pipeline. The first pipe of the smoke prevention and exhaust air duct extends outward, which plays the role of discharging smoke and ventilating. The second pipe is used to transport a large amount of air and oxygen into the room. By squeezing the air in a specific environment, the indoor smoke and harmful gases can be transported away. During use, an excellent smoke prevention and exhaust air duct can withstand a fire for nearly two hundred minutes, effectively ensuring the safety of indoor and outdoor personnel and property. The smoke prevention and exhaust air duct is usually made of high-tolerance materials such as heat-insulating color steel with double-sided embossing;

[0003] The existing smoke exhaust air duct is composed of multiple pipe segments connected by flanges. A large number of screws are required during the connection process, and the assembly efficiency is low;

[0004] The existing patent (publication number: CN219933258U) discloses an assembled fire smoke exhaust air duct that is convenient for assembly. When assembling the first fire exhaust air pipe and the second fire exhaust air pipe, then pull the fixing ball outwards, the spring is compressed, put the plug-in block into the inner part of the first slot hole, make the second plug-in slot parallel and aligned with the first plug-in slot, and then release the fixing ball. At this time, the spring resumes deformation, drives the installation block to be stuck into the inner part of the second plug-in slot, and completes the assembly.

[0005] In view of the above problems, the existing patent gives a solution, but during the installation process, the plug-in part can slide on the surfaces of the first mounting plate and the second mounting plate, indicating that there is a large gap between the plug-in part and the first mounting plate and the second mounting plate. Therefore, the fixing effect on the smoke prevention and exhaust air duct is poor. When the wind speed exceeds a certain speed, the airflow in the air duct will generate turbulence or eddy currents. These unstable airflows will generate periodic impact forces on the air duct wall, thereby causing the vibration of the air duct. Since the fixing effect between the two air ducts is poor, when vibrating, the gasket between the two air ducts will be worn, and finally the gasket will be damaged.

[0006] Therefore, an assembled smoke prevention and exhaust air duct is proposed. Summary of the Invention

[0007] The purpose of the utility model is to provide an assembled smoke prevention and exhaust air duct, which can solve the problem that the gasket between the two air ducts will be worn and finally the gasket will be damaged during vibration.

[0008] To achieve the above object, the utility model provides the following technical solution: a prefabricated smoke exhaust and prevention air duct, including a duct body, with a first flange and a second flange respectively provided at both ends of the duct body. A first jack and a second jack are respectively opened on the first flange and the second flange. An installation rod is detachably inserted into the first jack. A clamping rod is hinged on the side wall of the installation rod. A guide plate and a support block are installed on the side wall of the first mounting plate. A cross bar is horizontally installed on the end wall of the installation rod near the guide plate; a pressurizing mechanism is provided on the support block for cooperating with the cross bar;

[0009] The pressurizing mechanism includes a sliding groove opened on the support block. A top rod is slidably installed in the sliding groove. A gas is filled in the space between the end face of the top rod and the side wall of the sliding groove, and the gas can expand when heated.

[0010] Preferably, a heat conducting rod with its top extending into the sliding groove is inserted on the side wall of the first flange.

[0011] First, a sealing gasket is arranged between the first flange and the second flange on two adjacent duct bodies. Then, the first jack and the second jack on the first flange and the second flange are aligned. Then, the installation rod is inserted into the first jack and penetrates through the second jack. Then, the clamping rod is rotated. At this time, the clamping rod is located on the surface of the second flange, so that the installation rod can be prevented from falling under the interaction of the cross bar and the clamping rod. Then, the cross bar is rotated to make the cross bar move along the guide plate. During this process, the first flange, the second flange and the sealing gasket are all squeezed, thereby improving the sealing performance, and the sealing gasket deforms until the cross bar moves to the surface of the support block, so as to fix the first flange and the second flange;

[0012] When the duct body vibrates and causes the sealing gasket to be rubbed, that is, when the first flanges and the second flanges of two adjacent ones are misaligned, the heat generated by the friction is transmitted to the sliding groove through the heat conducting rod. At this time, the ammonia gas in the sliding groove expands, and the air pressure in the sliding groove increases. The air pressure pushes the top rod out of the sliding groove and contacts the cross bar, so that the pressure of the first flange and the second flange on the sealing gasket can be increased under the action of the reaction force, reducing the vibration between the first flange and the second flange and improving the protection effect on the sealing gasket.

[0013] Preferably, an installation groove is opened on the side wall of the installation rod. The clamping rod is hinged on the side wall of the installation groove, and the broken wall of the installation groove is used to limit the rotation angle of the clamping rod.

[0014] Preferably, an elastic block is installed on the side wall of the installation groove.

[0015] In the initial state, under the action of the elastic block, there is an included angle between the clamping rod and the side wall of the installation groove. When the installation rod is inserted into the first jack and the second jack, the side walls of the first jack and the second jack exert pressure on the clamping rod. Therefore, the elastic block is squeezed, and the clamping rod rotates back into the installation groove, so that the installation rod can pass through the first jack and the second jack; after the clamping rod penetrates the second jack, the elastic block automatically pushes the clamping rod to rotate to the surface of the second flange, thus reducing the workload of the staff and playing a role in improving convenience.

[0016] Preferably, support rods are evenly and elastically inserted on the side wall of the sliding groove.

[0017] During the upward movement of the ejector rod, the support rods extend to the bottom of the ejector rod one by one, preventing the ejector rod from retracting into the sliding groove, so as to ensure that the ejector rod can exert a thrust on the cross bar.

[0018] Preferably, a heat insulation sleeve is sleeved on the outer wall of the heat conducting rod.

[0019] Under the action of the heat insulation sleeve, heat loss can be reduced, playing a role in ensuring that the heat generated by friction can be transferred to the sliding groove.

[0020] Preferably, a clamping groove is opened at the end of the ejector rod.

[0021] When the ejector rod extends out of the sliding groove, under the action of the clamping groove, the position of the cross bar can be restricted, preventing the cross bar from moving, playing a role in preventing the cross bar from falling, and improving stability.

[0022] Compared with the prior art, the beneficial effects of the present utility model are:

[0023] In this application, by setting the ejector rod, the sliding groove, the heat conducting rod, and the support block, when adjacent two first flanges and second flanges are misaligned, the heat generated by friction is transferred to the sliding groove through the heat conducting rod. At this time, the ammonia gas in the sliding groove expands, and the air pressure pushes the ejector rod to extend out of the sliding groove and contact the cross bar. Thus, under the action of the reaction force, the pressure of the first flange and the second flange on the gasket can be increased, reducing the jitter between the first flange and the second flange, and improving the protection effect on the gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is the first three-dimensional structural view of the present utility model;

[0026] Figure 2 This is for the utility model Figure 1 An enlarged view of part A in it;

[0027] Figure 3 This is a combined view of the mounting rod, guide plate, and support block of the utility model;

[0028] Figure 4 This is a combined view of the mounting rod and the clamping plate of the utility model;

[0029] Figure 5 This is a cross-sectional view of the support block of the utility model.

[0030] Explanation of reference numerals in the drawings:

[0031] 1. Pipe body; 2. First flange; 3. Second flange; 4. Mounting rod; 5. Clamping rod; 6. Guide plate; 7. Support block; 8. Cross bar; 9. Slide groove; 10. Jacking rod; 11. Heat conducting rod; 12. Mounting groove; 13. Elastic block; 14. Support rod; 15. Heat insulation sleeve; 16. Card slot. Specific implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0033] Please refer to Figures 1 to 5 , the present utility model provides a technical solution:

[0034] An assembled smoke exhaust and air supply duct includes a pipe body 1. First flanges 2 and second flanges 3 are respectively provided at both ends of the pipe body 1. First jack holes and second jack holes are respectively formed on the first flanges 2 and the second flanges 3. A mounting rod 4 is detachably inserted into the first jack hole. A clamping rod 5 is hinged on the side wall of the mounting rod 4. A guide plate 6 and a support block 7 are mounted on the side wall of the first mounting plate. A cross bar 8 is horizontally mounted on the end wall of the mounting rod 4 close to the guide plate 6; A pressing mechanism cooperating with the cross bar 8 is provided on the support block 7;

[0035] The pressing mechanism includes a slide groove 9 formed on the support block 7. A jacking rod 10 is slidably mounted in the slide groove 9. A gas is filled in the space between the end face of the jacking rod 10 and the side wall of the slide groove 9, and the gas can expand when heated.

[0036] Specifically, as Figure 5 shown, a heat conducting rod 11 with its top extending into the slide groove 9 is inserted into the side wall of the first flange 2.

[0037] First, a gasket is provided between the first flange 2 and the second flange 3 on two adjacent pipe bodies 1. Then, the first jack holes and the second jack holes on the first flange 2 and the second flange 3 are aligned. Then, the installation rod 4 is inserted into the first jack hole and penetrates through the second jack hole. Then, the clamping rod 5 is rotated. At this time, the clamping rod 5 is located on the surface of the second flange 3, so that the installation rod 4 can be prevented from falling under the interaction of the cross bar 8 and the clamping rod 5. Then, the cross bar 8 is rotated to make the cross bar 8 move along the guide plate 6. During this process, the first flange 2, the second flange 3 and the gasket are all squeezed, thereby improving the sealing performance, and the gasket deforms until the cross bar 8 moves to the surface of the support block 7, so that the first flange 2 and the second flange 3 can be fixed;

[0038] When the pipe body 1 shakes and causes the gasket to be rubbed, that is, when the two adjacent first flanges 2 and second flanges 3 are misaligned, the heat generated by the friction is transmitted to the chute 9 through the heat conducting rod 11. At this time, the ammonia gas in the chute 9 expands, and the air pressure in the chute 9 increases. The air pressure pushes the ejector rod 10 to protrude from the chute 9 and contact the cross bar 8, so that the pressure of the first flange 2 and the second flange 3 on the gasket can be increased under the action of the reaction force, the shaking between the first flange 2 and the second flange 3 is reduced, and the protection effect on the gasket is improved.

[0039] Specifically, as Figure 4 shown, an installation groove 12 is formed on the side wall of the installation rod 4. The clamping rod 5 is hinged on the side wall of the installation groove 12, and the broken wall of the installation groove 12 is used to limit the rotation angle of the clamping rod 5.

[0040] An elastic block 13 is installed on the side wall of the installation groove 12.

[0041] In the initial state, under the action of the elastic block 13, there is an included angle between the clamping rod 5 and the side wall of the installation groove 12. When the installation rod 4 is inserted into the first jack hole and the second jack hole, the side walls of the first jack hole and the second jack hole apply pressure to the clamping rod 5. Therefore, the elastic block 13 is squeezed, and the clamping rod 5 rotates back into the installation groove 12, so that the installation rod 4 can pass through the first jack hole and the second jack hole; after the clamping rod 5 penetrates through the second jack hole, the elastic block 13 automatically pushes the clamping rod 5 to rotate to the surface of the second flange 3, so the workload of the staff is reduced, which plays a role in improving the convenience.

[0042] Specifically, as Figure 5 shown, support rods 14 are evenly and elastically inserted on the side wall of the chute 9.

[0043] During the upward movement of the ejector rod 10, the support rods 14 are successively extended to the bottom of the ejector rod 10 to prevent the ejector rod 10 from retracting into the chute 9, so as to ensure that the ejector rod 10 can apply a thrust to the cross bar 8.

[0044] Specifically, as Figure 5As shown, a heat insulation sleeve 15 is sleeved on the outer wall of the heat conducting rod 11.

[0045] Under the action of the heat insulation sleeve 15, heat loss can be reduced, ensuring that the heat generated by friction can be transferred to the sliding groove 9.

[0046] Specifically, as Figure 3 shown, a clamping groove 16 is formed at the end of the ejector rod 10.

[0047] When the ejector rod 10 extends out of the sliding groove 9, the position of the cross bar 8 can be restricted under the action of the clamping groove 16 to prevent the cross bar 8 from moving, thus preventing the cross bar 8 from falling and improving the stability.

[0048] Working principle: First, a sealing gasket is arranged between the first flange 2 and the second flange 3 on two adjacent pipe bodies 1. Then, the first jack and the second jack on the first flange 2 and the second flange 3 are aligned. Then, the mounting rod 4 is inserted into the first jack and penetrates through the second jack. Then, the clamping rod 5 is rotated. At this time, the clamping rod 5 is located on the surface of the second flange 3, so that the mounting rod 4 can be prevented from falling under the interaction between the cross bar 8 and the clamping rod 5. Then, the cross bar 8 is rotated to make the cross bar 8 move along the guide plate 6. During this process, the first flange 2, the second flange 3 and the sealing gasket are all squeezed, thereby improving the sealing performance, and the sealing gasket deforms until the cross bar 8 moves to the surface of the support block 7, so that the first flange 2 and the second flange 3 can be fixed;

[0049] When the pipe body 1 shakes and causes the sealing gasket to be rubbed, that is, when the first flanges 2 and the second flanges 3 of two adjacent ones are misaligned, the heat generated by the friction is transferred to the sliding groove 9 through the heat conducting rod 11. At this time, the ammonia gas in the sliding groove 9 expands, and the air pressure in the sliding groove 9 increases. The air pressure pushes the ejector rod 10 to extend out of the sliding groove 9 and contact the cross bar 8, so that the pressure of the first flange 2 and the second flange 3 on the sealing gasket can be increased under the action of the reaction force, reducing the shaking between the first flange 2 and the second flange 3 and improving the protection effect on the sealing gasket.

[0050] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An assembled smoke exhaust duct, comprising a duct body (1), characterized in that: The two ends of the tube body (1) are respectively provided with a first flange (2) and a second flange (3); the first flange (2) and the second flange (3) are respectively provided with a first plug hole and a second plug hole; a mounting rod (4) is detachably inserted into the first plug hole; a clamping rod (5) is hinged on the side wall of the mounting rod (4); a guide plate (6) and a support block (7) are installed on the side wall of the first flange (2); a cross bar (8) is horizontally installed on the end wall of the mounting rod (4) close to one end of the guide plate (6); and a pressure mechanism cooperating with the cross bar (8) is provided on the support block (7); The pressurizing mechanism comprises a slide groove (9) provided on the support block (7), a push rod (10) being slidably mounted in the slide groove (9), and a gas being filled in the space between the end surface of the push rod (10) and the side wall of the slide groove (9), and the gas being able to expand when heated.

2. The assembled smoke exhaust duct according to claim 1 is characterized in that: A heat conducting rod (11) with a top end extending into the slide groove (9) is inserted into the side wall of the first flange (2).

3. The assembled smoke exhaust duct according to claim 2 is characterized in that: A mounting groove (12) is provided on the side wall of the mounting rod (4), the clamping rod (5) is hinged on the side wall of the mounting groove (12), and the broken wall of the mounting groove (12) is used to limit the rotation angle of the clamping rod (5).

4. The assembled smoke exhaust duct according to claim 3 is characterized in that: An elastic block (13) is installed on the side wall of the installation groove (12).

5. The assembled smoke exhaust duct according to claim 1 is characterized in that: Support rods (14) are evenly and elastically inserted on the side walls of the slide groove (9).

6. The assembled smoke exhaust duct according to claim 2 is characterized in that: A heat insulating sleeve (15) is sleeved on the outer wall of the heat conducting rod (11).

7. The assembled smoke exhaust duct according to claim 1 is characterized in that: A clamping groove (16) is provided at the end of the push rod (10).

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