Galvanized sheet air pipe with low air leakage rate

Abstract

The utility model relates to the technical field of building fire protection, in particular to a low-air-leakage-rate galvanized sheet air pipe which comprises a first pipe and a second pipe, a sealing groove is formed in the first pipe, a flange is fixedly connected to one end of the second pipe and inserted into the sealing groove in a sliding mode, a sealing ring is fixedly connected to the bottom wall of the sealing groove, and the sealing ring is fixedly connected to the bottom wall of the second pipe. A locking assembly used for fixing the second pipe is arranged on the outer wall of the first pipe. The sealing groove is formed in the first pipe, the sealing ring is fixedly connected into the sealing groove, the flange is arranged on the second pipe and inserted into the sealing groove, one end of the flange makes close contact with the sealing ring, the sealing performance of the joint of the first pipe and the second pipe is enhanced, and the air leakage rate is low.

Description

Technical Field

[0001] The utility model relates to the technical field of building fire protection ventilation, in particular to a galvanized plate air duct with low air leakage rate. Background Art

[0002] Galvanized air duct is an indispensable fire-fighting device for ventilation and fire prevention in modern buildings. Its function is to guide hot air, smoke and other hot gases to the outside. Galvanized air duct is formed by welding multiple zinc-coated plates. In actual use, the galvanized plate air duct needs to be divided into multiple components, installed when arriving at the destination, and then the multiple components of the galvanized air duct are connected to form a whole. The existing air duct connection methods are divided into common plate flange connection and flange connection. Common plate flange connection has the advantages of saving materials and easy transportation, but the common plate flange is mainly connected by angle code, flange clamp, and flange connected to the air duct.

[0003] Its connecting surface is a plane that is prone to air leakage, and sheet metal deformation is prone to occur during use. It is difficult to use it in some ventilation ducts that require high sealing and firm strength.

[0004] Therefore, a galvanized sheet air duct with low air leakage rate is proposed. Utility Model Content

[0005] The utility model aims to provide a galvanized sheet air duct with low air leakage rate, which increases the contact area by arranging sealing rings, sealing grooves, etc., so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A galvanized sheet air duct with low air leakage rate comprises a first tube and a second tube. The first tube is provided with a sealing groove, one end of the second tube is fixedly connected with a flange, the flange is slidably inserted in the sealing groove, a sealing ring is fixedly connected to the bottom wall of the sealing groove, and a locking assembly for fixing the second tube is provided on the outer wall of the first tube.

[0008] Preferably, one end of the flange is fixedly connected to an insulation block, the sealing ring is provided with a groove corresponding to the insulation block, the insulation block is made of glass fiber, and lugs are provided on both side walls of the insulation block, and the diameter of the lugs is equal to the width of the sealing groove.

[0009] The locking assembly includes: a locking rod, a tilting block, and a steel wire rope; a plurality of tilting grooves are provided on the outer wall of the tube one, and a plurality of tilting blocks are provided. The plurality of tilting blocks are slidably installed in the tilting grooves respectively, and the locking rod is rotatably installed on the outer wall of the tube one. The plurality of tilting blocks are provided with through holes, and the steel wire rope passes through the through holes on the plurality of tilting blocks, and the steel wire rope is wound around the locking rod.

[0010] Preferably, a plurality of positioning holes are provided on the side wall of the tube 1, a positioning rod is slidably mounted on the locking rod, and a spring is provided between the positioning rod and the locking rod.

[0011] Preferably, chamfers are provided on both side walls of the sealing groove.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. A sealing groove is provided on pipe one, in which a sealing ring is fixedly connected; a flange is provided on pipe two and inserted into the sealing groove, so that one end of the flange is in close contact with the sealing ring, thereby enhancing the sealing performance of the joint between pipe one and pipe two and reducing the air leakage rate.

[0014] 2. An insulation block is set at one end of the flange to separate the gas from the sealing ring, so that most of the heat in the gas cannot contact the sealing ring, the sealing ring will not melt due to heat, and the service life of the sealing ring will be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 This is a structural schematic diagram of the sealing groove of the utility model;

[0017] Figure 3 This is a cross-sectional view of the sealing groove structure of the utility model;

[0018] Figure 4 This is a structural diagram of the positioning rod.

[0019] In the figure: 1. Tube 1; 2. Tube 2; 3. Tilting block; 4. Through hole; 5. Locking rod; 6. Wire rope; 7. Sealing groove; 8. Sealing ring; 9. Insulation block; 10. Lug; 11. Tilting groove; 12. Flange; 13. Positioning hole; 14. Positioning rod; 15. Spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figures 1 to 3 The utility model provides a galvanized sheet air duct with low air leakage rate, and the technical scheme is as follows:

[0022] A low air leakage rate galvanized sheet air duct comprises a tube 1 and a tube 2. The tube 1 is provided with a sealing groove 7. One end of the tube 2 is fixedly connected with a flange 12. The flange 12 is slidably inserted in the sealing groove 7. A sealing ring 8 is fixedly connected to the bottom wall of the sealing groove 7. A locking assembly for fixing the tube 2 2 is provided on the outer wall of the tube 1.

[0023] When docking, insert the flange 12 into the sealing groove 7, one end of the flange 12 contacts and squeezes the sealing ring 8, and then use the locking assembly to lock the pipe 2 2 and the pipe 1 1. The flange 12 is in close contact with the sealing ring 8, so that the sealing performance of the docking point between the pipe 1 and the pipe 2 is strong and the air leakage rate is low.

[0024] like Figure 2 As shown, one end of the flange 12 is fixedly connected to an insulation block 9, a groove corresponding to the insulation block 9 is opened on the sealing ring 8, the insulation block 9 is made of glass fiber, and lugs 10 are provided on the two side walls of the insulation block 9, and the diameter of the lugs 10 is equal to the width of the sealing groove 7.

[0025] Sometimes the temperature of the gas introduced into tube 1 and tube 2 is relatively high, and long-term direct contact between the gas and the sealing ring 8 may cause the sealing ring 8 to melt due to the heat. Therefore, a heat insulation block is provided to block the gas so that most of the heat of the gas cannot contact the sealing ring 8, thereby ensuring that the sealing ring 8 can be used for a long time.

[0026] like Figure 1 and Figure 3 As shown, the locking assembly includes: a locking rod 5, a tilting block 3, and a steel wire rope 6; a plurality of tilting grooves 11 are provided on the outer wall of the tube 1, and the tilting block 3 is provided with a plurality of them, and the plurality of tilting blocks 3 are respectively slidably installed in the tilting grooves 11, and the locking rod 5 is rotatably installed on the outer wall of the tube 1, and the plurality of tilting blocks 3 are provided with through holes 4, and the steel wire rope 6 passes through the through holes 4 on the plurality of tilting blocks 3, and the steel wire rope 6 is wound around the locking rod 5, and both ends of the steel wire rope 6 are fixedly connected to the locking rod 5.

[0027] The locking rod 5 is located on the side of the plurality of tilting blocks 3 and is arranged in an inclined shape with respect to the tilting blocks 3 .

[0028] After placing the flange 12 into the sealing groove 7, the side wall of the insulation block 9 at one end of the flange 12 is moved to the position contacting the sealing ring 8. At this time, the lug 10 is moved to the bottom of the inclined groove 11, and the locking rod 5 is rotated. The wire rope 6 is tightened to drive the inclined block 3 to move toward the inside of the inclined groove 11. The bottom of the inclined block 3 is set to be an arc shape. When the inclined block 3 moves downward, it first contacts the lug 10. Under the thrust of the inclined block 3, the lug 10 is pushed inward a short distance, so that the insulation block 9 further compresses the sealing ring 8 to improve the sealing effect, and the inclined block 3 forms a limiting effect on the lug 10, and then the pipe 2 2 is fixed under the action of the rotation of the locking rod 5.

[0029] like Figure 3 and Figure 4 As shown, a plurality of positioning holes 13 are opened on the side wall of the tube 1, a positioning rod 14 is slidably installed on the locking rod 5, and a spring 15 is provided between the positioning rod 14 and the locking rod 5. When the locking rod 5 rotates to pull the wire rope 6, so that the plurality of tilting blocks 3 complete the locking of the tube 2, the positioning rod 14 is inserted into the positioning hole 13, and the positioning rod 14 will not automatically leave the positioning hole 13 under the action of the spring 15, thereby completing the fixation of the locking rod 5.

[0030] The two side walls of the sealing groove 7 are both provided with chamfers, and the chamfers are provided so that the outer wall of the sealing groove 7 forms an outer eight shape, which makes it easier to find the correct position when inserting the flange 12.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A galvanized sheet air duct with low air leakage rate, characterized in that: The invention comprises a first tube (1) and a second tube (2), wherein the first tube (1) is provided with a sealing groove (7), one end of the second tube (2) is fixedly connected with a flange (12), the flange (12) is slidably inserted in the sealing groove (7), a sealing ring (8) is fixedly connected to the bottom wall of the sealing groove (7), and a locking assembly for fixing the second tube (2) is provided on the outer wall of the first tube (1), the locking assembly comprising: a locking rod (5), a tilting block (3), and a steel wire rope (6); The outer wall of the tube (1) is provided with a plurality of inclined grooves (11), the inclined blocks (3) are provided with a plurality of inclined blocks (3), the plurality of inclined blocks (3) are slidably mounted in the inclined grooves (11) respectively and correspondingly, the locking rod (5) is rotatably mounted on the outer wall of the tube (1), the plurality of inclined blocks (3) are provided with through holes (4), the steel wire rope (6) passes through the through holes (4) on the plurality of inclined blocks (3), and the steel wire rope (6) is wound around the locking rod (5); A plurality of positioning holes (13) are provided on the side wall of the tube 1 (1), a positioning rod (14) is slidably mounted on the locking rod (5), and a spring (15) is provided between the positioning rod (14) and the locking rod (5).

2. The low air leakage rate galvanized sheet air duct according to claim 1, characterized in that: One end of the flange (12) is fixedly connected to a heat insulating block (9), the sealing ring (8) is provided with a groove corresponding to the heat insulating block (9), the heat insulating block (9) is made of glass fiber, and lugs (10) are provided on both side walls of the heat insulating block (9), and the diameter of the lugs (10) is equal to the width of the sealing groove (7).

3. The low air leakage rate galvanized sheet air duct according to claim 1, characterized in that: Chamfers are provided on both side walls of the sealing groove (7).

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