CN211451313U - Warm ventilation pipe system convenient to installation - Google Patents

Warm ventilation pipe system convenient to installation Download PDF

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Publication number
CN211451313U
CN211451313U CN201921927790.2U CN201921927790U CN211451313U CN 211451313 U CN211451313 U CN 211451313U CN 201921927790 U CN201921927790 U CN 201921927790U CN 211451313 U CN211451313 U CN 211451313U
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CN
China
Prior art keywords
flange
positioning
rubber gasket
annular rubber
annular
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CN201921927790.2U
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Chinese (zh)
Inventor
赖敏刚
丁潇雄
董雪健
俞庆干
万宗斌
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Zhejiang Provincial Erjian Construction Group Installation Co ltd
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Zhejiang Provincial Erjian Construction Group Installation Co ltd
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Priority to CN201921927790.2U priority Critical patent/CN211451313U/en
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Publication of CN211451313U publication Critical patent/CN211451313U/en
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Abstract

The utility model relates to a warm ventilation pipe system convenient to installation, include a plurality of ventilation pipes, set up in the angle steel flange at ventilation pipe both ends and annular rubber gasket, the angle steel flange is including the first flange that is located ventilation pipe one end and the second flange that is located the ventilation pipe other end, first flange lateral surface is provided with a plurality of reference columns and a plurality of first connecting hole that are used for bolted connection, second flange lateral surface is provided with the confession locating hole that the reference column was pegged graft and a plurality of second connecting hole that are used for bolted connection, first connecting hole with the coaxial setting of second connecting hole, annular rubber gasket connect and bulge in the first flange outside, the confession has been seted up in the second flange outside the ring groove of annular rubber gasket joint. The utility model discloses a reference column is pegged graft and can be made first connecting hole and second connecting hole coaxial in the locating hole, simultaneously with annular rubber gasket joint in ring groove, has the characteristics of conveniently connecting adjacent ventilation pipe.

Description

Warm ventilation pipe system convenient to installation
Technical Field
The utility model relates to a warm technical field who leads to tuber pipe, in particular to warm logical tuber pipe system convenient to installation.
Background
The ventilation pipe is applied to the transmission of cold and warm air of heating and ventilation air conditioning system, and general ventilation pipe is made by the galvanized sheet and passes through flange joint between each section ventilation pipe, and traditional galvanized ventilation pipe generally adopts welding or riveting with the flange to be connected, and its structure is comparatively complicated, and the leakproofness is relatively poor. Due to the objective condition limitations of the construction site, the modular production of ventilation duct installations is restricted. When the ventilation pipe is riveted, the installation process is complicated, and the processes of drilling, riveting and the like are required, so that the installation efficiency of the ventilation pipe is reduced; and the flange of traditional zinc-plated ventilation pipe adopts the angle steel material, has increased the weight of ventilation pipe and has improved the cost of manufacture.
In view of this, the patent document with the current chinese patent grant publication No. CN203477680U discloses a novel ventilation pipe system of heating ventilation air conditioner, this ventilation pipe system includes a plurality of galvanized ventilation pipes and a plurality of angle steel flanges promptly, still include a plurality of annular rubber gaskets, angle steel flange is by panel roll forming and through the connecting piece through the combination of riveting-free punching press for whole, a plurality of angle steel flanges locate the both ends of a plurality of galvanized ventilation pipes through riveting-free punching press, two liang of adjacent galvanized ventilation pipes pass through the angle steel flange connection at both ends, pass through bolted connection between the adjacent angle steel flanges, a plurality of annular rubber gaskets are located between each adjacent angle steel flange.
In the scheme, however, adjacent angle steel flanges need to be connected through bolts, and corresponding bolt holes between the adjacent angle steel flanges need to be coaxially arranged before the bolts are connected; in addition, the annular rubber gasket and the angle steel flange are coaxially arranged, so that the bolts can penetrate through the adjacent angle steel flange plates and the annular rubber gasket at the same time, and therefore the connection between the adjacent ventilation pipes is inconvenient.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a warm ventilation pipe system convenient to installation pegs graft in the locating hole through the reference column and can make first connecting hole and second connecting hole coaxial, simultaneously with annular rubber gasket joint in ring groove, has the characteristics of conveniently connecting adjacent ventilation pipe.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
the utility model provides a warm ventilation pipe system convenient to installation, includes a plurality of ventilation pipes, sets up in the angle steel flange at ventilation pipe both ends and annular rubber gasket, the angle steel flange is including the first flange that is located ventilation pipe one end and the second flange that is located the ventilation pipe other end, first flange lateral surface is provided with a plurality of reference columns and a plurality of first connecting hole that are used for bolted connection, second flange lateral surface is provided with the confession locating hole that the reference column was pegged graft and a plurality of second connecting holes that are used for bolted connection, first connecting hole with the coaxial setting of second connecting hole, annular rubber gasket connect and protruding in the first flange outside, the confession has been seted up in the second flange outside the ring groove of annular rubber gasket joint.
By adopting the technical scheme, the relative positions of the first connecting hole and the positioning column on the first flange are fixed, and the relative positions of the second connecting hole and the positioning hole on the second flange are fixed, so that after the positioning column is inserted into the positioning hole, the positioning column can be used as pre-fixing, that is, the first connecting hole and the second connecting hole can be coaxially arranged, a bolt can conveniently penetrate through the first connecting hole and the second connecting hole simultaneously, and therefore the adjacent first flange and the second flange can be conveniently connected, that is, the adjacent ventilation pipe can be conveniently connected; the annular rubber gasket is connected and protrudes outside the first flange, so that the annular rubber gasket is fixed with the relative position of the positioning column outside the first flange, and the annular clamping groove is fixed with the relative position of the positioning hole outside the second flange, so that the annular rubber gasket can be clamped in the annular clamping groove when the positioning column is in splicing fit with the positioning hole. In sum, the first connecting hole and the second connecting hole can be coaxial only by inserting the positioning column into the positioning hole, and meanwhile, the annular rubber gasket is clamped in the annular clamping groove, so that adjacent ventilation pipes are conveniently connected; in addition, the arrangement of the annular rubber gasket can improve the sealing performance between adjacent ventilation pipes, reduce the leakage of warm air in the ventilation pipe and improve the air supply efficiency, so that the utilization rate of a fan is relatively improved, the energy is saved, and meanwhile, the noise in the ventilation pipe is reduced in the ventilation process, so that the ventilation pipe is more environment-friendly.
The utility model discloses further set up to: and one end of the positioning column, which is far away from the first flange, is provided with a positioning assembly, the positioning assembly comprises a positioning block and an elastic piece, the positioning block is vertically movably inserted into the positioning column, the elastic piece drives the positioning block to be far away from the positioning column to reset, and the positioning block can be completely and vertically inserted into the positioning column.
By adopting the technical scheme, when the positioning column is in splicing fit with the positioning hole, the positioning block is pressed downwards so as to be completely and vertically inserted into the positioning column; the positioning column is further inserted, the positioning block penetrates through the positioning hole, the elastic piece resets the positioning block in the direction away from the positioning column again so as to extend out of the positioning column, the side face, close to the positioning hole, of the positioning block is abutted against the side face, close to the positioning block, of the flanging connecting piece, so that limiting is formed, and the positioning column cannot be easily pulled out; on one hand, the pre-fixing effect of the positioning columns can be enhanced, and on the other hand, the connecting strength between the adjacent air sending and ventilating pipes can be enhanced.
The utility model discloses further set up to: the positioning column is provided with a positioning groove for the movable insertion of the positioning block, one end of the elastic piece is abutted against the bottom wall of the positioning groove, and the other end of the elastic piece is abutted against the bottom of the positioning block.
By adopting the technical scheme, the positioning groove can provide an installation site for the movable insertion of the positioning block, and the groove walls on the two sides can limit the movable insertion direction of the positioning block, so that the movable direction of the positioning block is more stable; the constant head tank provides the installation site for the elastic component equally, and cell wall and rather than the locating piece of butt can form global protection, can promote the stability that resets of elastic component on the one hand, on the other hand reducible external environment is to the damage of elastic component, the life of extension elastic component.
The utility model discloses further set up to: the constant head tank diapire is provided with the confession the fixed column that the elastic component cover was established.
Through adopting above-mentioned technical scheme, the fixed column is located to the elastic component cover, and the fixed column can regard as the removal direction of elastic component to make the compression of elastic component more stable with reseing.
The utility model discloses further set up to: the locating piece bottom is provided with the locating plate, the locating plate diameter is greater than the diameter of locating piece, the reference column is located the opening part of constant head tank has been seted up and has been inlayed the groove, it inlays and is equipped with the shrouding to inlay the groove interference, under the shrouding terminal surface with the butt of locating plate up end, the shrouding is seted up the confession the perforation that the locating piece wore to establish.
By adopting the technical scheme, after the sealing plate is embedded with the positioning hole, on one hand, the opening of the positioning hole can be sealed, so that external impurities are prevented from entering the positioning groove, and the elastic part is prevented from being influenced by the impurities to be compressed and reset; on the other hand, the positioning block can be limited in the positioning groove, and the positioning block is prevented from being separated from the positioning groove due to overlarge elastic resetting force.
The utility model discloses further set up to: and a guide surface is arranged on the side surface of the positioning block facing the positioning hole.
Through adopting above-mentioned technical scheme, the in-process that reference column and locating hole were pegged graft, the locating piece lead the face and the opening part butt of locating hole, it has certain inclination to lead the face, thereby as a guide, when the reference column is further pegged graft, the locating piece pushes down the elastic component and makes the elastic component compressed, the locating piece is pegged graft towards the reference column is interior, to pegging graft in the constant head tank completely, finally pass the locating hole together with the reference column, and reset by the elastic component, wear out the constant head tank again, with the side butt of turn-ups connecting piece. To sum up, the setting of leading the face can need not artifical locating piece of pushing down, directly with the reference column towards the constant head tank peg graft can to convenient pre-fixing.
The utility model discloses further set up to: annular rubber gasket medial surface is connected with annular magnetite, the confession has been seted up in the first flange outside the annular mounting groove that annular magnetite was placed, annular magnetite is kept away from annular rubber gasket's side and annular mounting groove adsorb to be connected.
By adopting the technical scheme, the annular rubber gasket can be bonded with the annular magnet through glue, and the sealing strip can be installed only by adsorbing and connecting the annular magnet in the annular installation groove, so that the sealing strip is simple, convenient and easy to operate; in addition, the annular magnet can also attract each other with ring groove to strengthen the laminating degree between annular rubber gasket and the ring groove, thereby increase the leakproofness between the adjacent ventilation pipe.
The utility model discloses further set up to: the annular rubber gasket outside is provided with the screw, the double-screw bolt of screw wears to establish simultaneously annular rubber gasket with annular magnetite, and with ann annular groove threaded connection, the screwhead of screw with annular rubber gasket outside butt, the confession has been seted up in the second flange outside the screwhead embedding of screw establishes the hole.
By adopting the technical scheme, the screw penetrates through the annular rubber gasket and the annular magnet at the same time and is in threaded connection with the annular mounting groove, so that the connection stability of the annular rubber gasket and the annular magnet and the connection strength of the annular magnet and the annular mounting groove are further improved; meanwhile, in the process of connecting the first flange and the second flange, the screw head of the screw can be embedded into the embedding hole, and the positioning accuracy between the first flange and the second flange which are connected is further improved.
The utility model discloses further set up to: and a plurality of L-shaped reinforcing blocks are arranged along the inner side surfaces of the first flange and the second flange.
Through adopting above-mentioned technical scheme, "L" type boss and the "L" type dog-ear of first flange and second flange medial surface phase-match, promote the mechanical strength of first flange and second flange, reduce the vibrations between first flange and the second flange at the ventilation in-process.
The utility model discloses further set up to: and a plurality of pressing ribs are arranged on the outer surface of the ventilation pipe at intervals.
Through adopting above-mentioned technical scheme, the pressure muscle can strengthen the structural strength of ventilation pipe, reduces ventilation pipe's vibrations, noise abatement in the ventilation process.
To sum up, the utility model discloses a beneficial technological effect does:
1. the first connecting hole and the second connecting hole can be coaxial only by inserting the positioning column into the positioning hole, and meanwhile, the annular rubber gasket is clamped in the annular clamping groove, so that adjacent ventilation pipes are conveniently connected;
2. the arrangement of the annular rubber gasket can improve the sealing performance between adjacent ventilation pipes, reduce the leakage of warm air in the ventilation pipe and improve the air supply efficiency, so that the utilization rate of a fan is relatively improved, the energy is saved, and meanwhile, the noise in the ventilation pipe in the ventilation process is reduced, so that the ventilation pipe is more environment-friendly;
3. the positioning block and the positioning column penetrate through the positioning hole together, and the side face of the positioning block, which is close to the positioning hole, is abutted against the side face of the flanging connecting piece, which is close to the positioning block, so that the limiting is formed, and the positioning column cannot be pulled out easily; on one hand, the pre-fixing effect of the positioning columns can be enhanced, and on the other hand, the connecting strength between the adjacent air sending and ventilating pipes can be enhanced.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of a partial explosion of the vent pipe of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
fig. 4 is a schematic structural view of the vent pipe of the present invention.
In the figure: 1. a vent pipe; 2. angle steel flanges; 3. an annular rubber gasket; 4. pressing ribs; 5. a first flange; 6. a second flange; 7. a reinforcing block; 8. a positioning column; 9. a first connection hole; 10. positioning holes; 11. a second connection hole; 12. positioning blocks; 13. an elastic member; 14. positioning a groove; 15. a guide surface; 16. positioning a plate; 17. embedding a groove; 18. closing the plate; 19. perforating; 20. fixing a column; 21. a ring magnet; 22. mounting grooves; 23. an annular neck; 24. a screw; 25. the embedding hole is arranged.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A heating ventilation pipe system convenient to install, referring to fig. 1, comprises a plurality of ventilation pipes 1, angle steel flanges 2 and annular rubber gaskets 3. The angle iron flanges 2 are formed by rolling plates and combined into a whole through riveting-free punching, the two ends of the ventilation pipes 1 are arranged on the angle iron flanges 2 through riveting-free punching, the annular rubber gaskets 3 are located between the adjacent angle iron flanges 2 of the adjacent ventilation pipes 1, the adjacent ventilation pipes 1 are connected through the adjacent angle iron flanges 2, and the adjacent angle iron flanges 2 are connected through bolts. A plurality of pressing ribs 4 are arranged on the outer surface of the ventilation pipe 1 at intervals, the structural strength of the ventilation pipe 1 is enhanced, the vibration of the ventilation pipe is reduced in the ventilation process, and the noise is reduced.
Angle steel flange 2 is including being located the first flange 5 of 1 one end of ventilation pipe and being located the second flange 6 of 1 other end of ventilation pipe, and first flange 5 and second flange 6 are provided with a plurality of "L" type bosses 7 along the medial surface, "L" type boss 7 and the "L" type dog-ear department phase-match of first flange 5 and 6 medial surfaces of second flange, "L" type boss 7 promotes the mechanical strength of first flange 5 and second flange 6, reduces the vibrations between first flange 5 and the second flange 6 at the ventilation in-process.
Referring to fig. 2, the outer side surface of the first flange 5 is provided with four positioning columns 8 and a plurality of first connection holes 9 for bolt connection, wherein the first connection holes 9 are distributed on four sides of the outer side surface of the first flange 5, and the four positioning columns 8 are respectively located at four vertex angles of the outer side surface of the first flange 5; the outer side surface of the second flange 6 is provided with a positioning hole 10 for the positioning column 8 to be inserted and a plurality of second connecting holes 11 for bolt connection, wherein the second connecting holes 11 are distributed on four sides of the outer side surface of the second flange 6, and the positioning hole 10 is arranged at four top corners of the outer side surface of the second flange 6. The positioning column 8 is inserted into the positioning hole 10, so that the first connecting hole 9 and the second connecting hole 11 are coaxially arranged, and the bolt can conveniently pass through the first connecting hole 9 and the second connecting hole 11 at the same time.
Referring to fig. 3, a positioning assembly is disposed at an end of the positioning column 8 away from the first flange 5, and the positioning assembly includes a positioning block 12 vertically movably inserted into the positioning column 8, and an elastic element 13 for driving the positioning block 12 to return away from the positioning column 8. The positioning column 8 is provided with a positioning groove 14 for movably inserting the positioning block 12, and the positioning block 12 can be completely vertically inserted into the positioning groove 14. The side of the positioning block 12 facing the positioning hole 10 is provided with a guide surface 15, so that the positioning block 12 can be pressed down and the elastic element 13 is compressed in the process that the positioning block 12 abuts against the positioning hole 10, the positioning hole 10 is gradually pressed into the positioning groove 14, and the positioning block 12 can conveniently pass through the positioning hole 10.
Referring to fig. 3, a positioning plate 16 is integrally arranged at the bottom of the positioning block 12, the diameter of the positioning plate 16 is larger than that of the positioning block 12, an embedding groove 17 is formed in an opening of the positioning column 8, which is located in the positioning groove 14, a sealing plate 18 is embedded in the embedding groove 17 in an interference manner, a through hole 19 for the positioning block 12 to penetrate through is formed in the sealing plate 18, and the lower end face of the sealing plate 18 abuts against the upper end face of the positioning plate.
The bottom wall of the positioning groove 14 is provided with a fixing column 20 for the elastic element 13 to be sleeved, one end of the elastic element 13 is abutted against the bottom wall of the positioning groove 14, and the other end of the elastic element is abutted against the bottom of the positioning plate 16. The fixing post 20 can be used as a moving guide for the elastic element 13, so that the compression and resetting of the elastic element 13 are more stable, and the setting length of the fixing post 20 does not interfere with the full insertion of the positioning block 12 into the positioning groove 14.
Referring to fig. 4, an annular magnet 21 is bonded to the inner side surface of the annular rubber gasket 3 through glue, a mounting groove 22 for placing the annular magnet 21 is formed in the outer side of the first flange 5, the side surface, away from the annular rubber gasket 3, of the annular magnet 21 is connected with the mounting groove 22 in an adsorption manner, and the outer sides of the annular rubber gasket 3 and the first flange 5 are connected through the annular magnet 21 and then protrude out of the first flange 5; annular groove 23 that supplies 3 joints of annular rubber gasket is seted up in the 6 outsides of second flange, when first flange 5 and second flange 6 are laminated each other, 3 joints of annular rubber gasket in annular groove 23 to promote the leakproofness between the adjacent ventilation pipe 1, reduce the warm braw that leads to in the pipeline and reveal, promote air supply efficiency, thereby promote the utilization ratio of fan relatively, the energy can be saved reduces the ventilation in-process simultaneously, the noise in the ventilation pipe 1.
A screw 24 is arranged on the outer side of the annular rubber gasket 3, a stud of the screw 24 penetrates through the annular rubber gasket 3 and the annular magnet 21 simultaneously and is in threaded connection with the mounting groove 22, so that the connection stability of the annular rubber gasket 3 and the annular magnet 21 and the connection strength of the annular magnet 21 and the annular mounting groove 22 are further improved; the screw 24 head and the 3 outside butt of annular rubber gasket of screw 24, the hole 25 is established to the inlaying of the 24 head embeddings of screw that supplies screw 24 is seted up in the second flange 6 outside, and the 24 heads of screw 24 can inlay and establish in the hole 25, further promotes the location accuracy between continuous first flange 5 and the second flange 6.
The implementation principle of the embodiment is as follows: when the adjacent ventilation pipes 1 are connected, the positioning columns 8 correspond to the positioning holes 10 and are close to each other, the positioning blocks 12 and the positioning columns 8 penetrate through the positioning holes 10 together, and the side faces, close to the positioning holes 10, of the positioning blocks 12 are abutted to the side faces, close to the positioning blocks 12, of the flanging connecting pieces; further, the first connecting hole 9 and the second connecting hole 11 are coaxial, meanwhile, the annular rubber gasket 3 is clamped in the annular clamping groove 23, and the screw 24 head of the screw 24 is embedded in the embedding hole 25; further, the connection between the adjacent ventilation pipes 1 can be completed by simultaneously passing bolts through the first connection holes 9 and the second connection holes 11 which are coaxially arranged and tightening them with nuts.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (10)

1. The utility model provides a warm ventilation pipe system convenient to installation, includes a plurality of ventilation pipes (1), sets up in angle steel flange (2) at ventilation pipe (1) both ends and annular rubber gasket (3), its characterized in that: angle steel flange (2) are including first flange (5) that are located ventilation pipe (1) one end and second flange (6) that are located the ventilation pipe (1) other end, first flange (5) lateral surface is provided with a plurality of reference columns (8) and a plurality of first connecting hole (9) that are used for bolted connection, second flange (6) lateral surface is provided with the confession locating hole (10) that reference column (8) were pegged graft and a plurality of second connecting hole (11) that are used for bolted connection, first connecting hole (9) with the coaxial setting of second connecting hole (11), annular rubber gasket (3) connect and protruding in the first flange (5) outside, the confession has been seted up in second flange (6) outside annular groove (23) of annular rubber gasket (3) joint.
2. An easy to install heating and ventilation duct system according to claim 1, wherein: one end, far away from the first flange (5), of the positioning column (8) is provided with a positioning assembly, the positioning assembly comprises a positioning block (12) and an elastic piece (13), the positioning block (12) is vertically movably inserted into the positioning column (8), the elastic piece drives the positioning block (12) to be far away from the positioning column (8) to reset, and the positioning block (12) can be completely and vertically inserted into the positioning column (8).
3. An easy to install heating and ventilation duct system according to claim 2, wherein: the positioning column (8) is provided with a positioning groove (14) for the movable insertion of the positioning block (12), one end of the elastic piece (13) is abutted against the bottom wall of the positioning groove (14), and the other end of the elastic piece is abutted against the bottom of the positioning block (12).
4. An easy to install heating and ventilation duct system according to claim 3, wherein: the bottom wall of the positioning groove (14) is provided with a fixing column (20) for sleeving the elastic piece (13).
5. An easy to install heating and ventilation duct system according to claim 4, wherein: locating piece (12) bottom is provided with locating plate (16), locating plate (16) diameter is greater than the diameter of locating piece (12), reference column (8) are located the opening part of constant head tank (14) has been seted up and has been inlayed groove (17), it inlays and is equipped with shrouding (18) to inlay groove (17) interference, shrouding (18) down the terminal surface with locating plate (16) up end butt, the confession has been seted up in shrouding (18) perforation (19) that locating piece (12) were worn to establish.
6. An easy to install heating and ventilation duct system according to claim 5, wherein: the side surface of the positioning block (12) facing the positioning hole (10) is provided with a guide surface (15).
7. An easy to install heating and ventilation duct system according to claim 6, wherein: annular rubber gasket (3) medial surface is connected with annular magnetite (21), the confession has been seted up in first flange (5) outside mounting groove (22) that annular magnetite (21) was placed, annular magnetite (21) are kept away from the side and the mounting groove (22) of annular rubber gasket (3) adsorb to be connected.
8. An easy to install heating and ventilation duct system according to claim 7, wherein: annular rubber gasket (3) outside is provided with screw (24), the double-screw bolt of screw (24) wears to establish simultaneously annular rubber gasket (3) with annular magnetite (21), and with mounting groove (22) threaded connection, screw (24) head of screw (24) with annular rubber gasket (3) outside butt, the confession has been seted up in second flange (6) outside the hole (25) are established in inlaying of the screw (24) head embedding of screw (24).
9. An easy to install heating and ventilation duct system according to claim 1, wherein: the first flange (5) and the second flange (6) are provided with a plurality of L-shaped reinforcing blocks (7) along the inner side surface.
10. An easy to install heating and ventilation duct system according to claim 1, wherein: the outer surface of the ventilation pipe (1) is provided with a plurality of pressing ribs (4) at intervals.
CN201921927790.2U 2019-11-08 2019-11-08 Warm ventilation pipe system convenient to installation Active CN211451313U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921927790.2U CN211451313U (en) 2019-11-08 2019-11-08 Warm ventilation pipe system convenient to installation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921927790.2U CN211451313U (en) 2019-11-08 2019-11-08 Warm ventilation pipe system convenient to installation

Publications (1)

Publication Number Publication Date
CN211451313U true CN211451313U (en) 2020-09-08

Family

ID=72300380

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921927790.2U Active CN211451313U (en) 2019-11-08 2019-11-08 Warm ventilation pipe system convenient to installation

Country Status (1)

Country Link
CN (1) CN211451313U (en)

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