Flexible composite air pipe

Abstract

The utility model relates to a flexible composite air pipe which comprises annular air pipe bodies, a pipe combining sealing adhesive layer, a pipe combining sealing adhesive tape, a lengthening sealing adhesive tape and a lengthening sealing adhesive layer, a pipe combining zipper is arranged in the length direction of the air pipe bodies, and a lengthening zipper is arranged in the circumferential direction of the connected ends of the two air pipe bodies; the pipe closing sealant layer is formed by surface drying of sealant at least filling a first gap, and the first gap is formed between zipper teeth of the pipe closing zipper; the pipe closing sealing adhesive tape is adhered to the air pipe body and covers the pipe closing zipper in an adhering manner; the extension sealing adhesive tape is adhered to the end parts of the two adjacent air pipe bodies and covers the extension zippers in an adhesion manner; the lengthened sealing adhesive layer is formed by surface drying of sealing adhesive at least filling a second gap, and the second gap is formed between the free end of the lengthened sealing adhesive tape and the outer surface of the air pipe body. The problem that in the prior art, the sealing performance and durability are not high can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flexible air pipe, in particular to a flexible composite air pipe. BACKGROUND

[0002] The existing flexible composite air pipe system is basically assembled and constructed by factory production and engineering site connection through a zipper. As the central air conditioning system supply / return air pipe, the sealing of the air pipe will greatly affect the supply effect and energy consumption of the central air conditioning system.

[0003] In order to reduce the air leakage of the flexible composite air pipe system, it is mainly solved from the air pipe body and the site assembly. Specifically, it includes:

[0004] The air leakage point of the air pipe body is mainly the sewing needle eye, which is generally sealed by coating sealant in the factory.

[0005] The site assembly air leakage point is mainly the gap of the zipper connection and the leakage at the intersection of the pipe joint zipper and the extension zipper. The main processing method at present is to set double zippers at the zipper connection (including the pipe joint zipper and the extension zipper), that is, to set zippers on the inner and outer walls of the air pipe respectively, to form material extrusion at the edge of the air pipe after closing the zippers by controlling the distance between the zippers and the edge of the material, so as to achieve sealing effect. At the same time, sealing tape is set at the zipper connection (including the pipe joint zipper and the extension zipper) for sealing.

[0006] Although the above scheme can solve the air leakage problem to some extent, it still has some disadvantages, such as low sealing performance and durability, which need to be further improved. Specifically, as follows:

[0007] 1. The double zipper connection scheme has great production and construction difficulty and low production and construction efficiency.

[0008] 2. The double zipper mainly uses the compression resilience of the material to achieve extrusion sealing. The resilience of the rubber and plastic insulation material decreases with the extension of the extrusion time, and the sealing performance will become poor after a period of use.

[0009] 3. The sealing tape is generally a non-drying adhesive. When the pipe joint zipper is continuously impacted by the high pressure airflow in the pipe for a long time, the tape will separate from the zipper, and the sealing effect cannot be achieved.

[0010] 4. The leakage at the intersection of the pipe joint zipper and the extension zipper is large, and extrusion sealing cannot be achieved. SUMMARY

[0011] The embodiments of the present application provide a flexible composite air pipe to solve the problem of low sealing performance and durability in the related art.

[0012] The embodiments of the present application provide a flexible composite air pipe, which comprises:

[0013] a plurality of ring-shaped duct bodies, each of which is provided with a joint zipper in the length direction thereof, and each of which is provided with a lengthening zipper in the circumferential direction of the end portion thereof;

[0014] a joint sealing adhesive layer formed by at least drying of an adhesive filled in a first gap formed between the teeth of the joint zipper;

[0015] a joint sealing adhesive tape adhered to the duct body and covering the joint zipper;

[0016] a lengthening sealing adhesive tape adhered to the end portion of two adjacent duct bodies and covering the lengthening zipper;

[0017] a lengthening sealing adhesive layer formed by at least drying of an adhesive filled in a second gap formed between the free end of the lengthening sealing adhesive tape and the outer surface of the duct body.

[0018] In some embodiments, a third gap is formed at the intersection of the joint zipper and the lengthening zipper;

[0019] The length of the lengthening sealing adhesive tape is greater than the length of the lengthening zipper, and the lengthening sealing adhesive tape forms an overlapping area between the two ends thereof after being wound around the duct body for at least one turn;

[0020] The overlapping area covers the third gap.

[0021] In some embodiments, the joint sealing adhesive tape and the lengthening sealing adhesive tape are made of the same material or different materials.

[0022] In some embodiments, the joint sealing adhesive tape is made of airproof adhesive tape, self-adhesive tape or butyl tape.

[0023] In some embodiments, the lengthening sealing adhesive tape is made of airproof adhesive tape, self-adhesive tape or butyl tape.

[0024] In some embodiments, the thickness of the adhesive on the joint sealing adhesive tape is greater than or equal to 0.8 mm.

[0025] In some embodiments, the thickness of the adhesive on the lengthening sealing adhesive tape is greater than or equal to 0.8 mm.

[0026] In some embodiments, the length of the joint sealing adhesive tape is the same as the length of the joint zipper.

[0027] In some embodiments, the adhesive has a bonding strength greater than or equal to 1 MPa.

[0028] And / or, the sealant is a fast-drying glue, which has a surface drying time of ≤10 minutes at room temperature, and a curing time of ≤24 hours when the glue thickness is ≤5mm.

[0029] In some embodiments, the sealant is an elastomer after surface drying and curing, which has an elongation of ≥100%, a tensile strength of ≥1Mpa, and a tear strength of ≥3KN / m.

[0030] And / or, the sealant has a temperature resistance range of -30℃ to 60℃.

[0031] In some embodiments, the outer side of the length direction of the duct body is provided with the jointing zipper.

[0032] The outer side of the circumferential direction of the end of the two duct bodies is provided with the lengthening zipper.

[0033] The technical scheme provided by the application has the following beneficial effects:

[0034] The application provides a flexible composite duct. The jointing zipper is coated with a sealant to form a jointing sealant layer and a jointing sealant tape is pasted, which effectively avoids the continuous impact of the high-pressure airflow in the duct on the jointing sealant tape through the first gap between the teeth of the jointing zipper, thereby avoiding the separation of the jointing sealant tape from the jointing zipper and achieving long-lasting sealing.

[0035] After the lengthening zipper is pulled together, the lengthening sealant tape is pasted on the lengthening zipper, and then the lengthening sealant tape is arranged along the circumferential direction of the duct body. The duct body expands outward under the pressure of the airflow in the duct after ventilation, so that the lengthening sealant tape is more closely attached to the duct body. Even if the lengthening sealant tape is continuously impacted by the high-pressure airflow in the duct, the lengthening sealant tape is difficult to separate from the lengthening zipper, or even will not separate from the lengthening zipper. The sealant is coated on the joint between the free end of the lengthening sealant tape and the outer surface of the duct body, so that the two are integrated and bonded, which reinforces the sealing, and effectively prevents the high-pressure airflow in the duct from flowing out through the third gap formed at the intersection of the jointing zipper and the lengthening zipper, thereby achieving long-lasting sealing. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical scheme in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0037] Figure 1 The schematic diagram before the duct body is jointed in the embodiments of the application;

[0038] Figure 2A schematic view of the wind pipe body provided by the embodiment of the present application after pipe connection;

[0039] Figure 3 A schematic view of the wind pipe body provided by the embodiment of the present application after pipe extension;

[0040] Figure 4 A schematic view of the flexible composite wind pipe provided by the embodiment of the present application.

[0041] In the figure: 1, wind pipe body; 2, pipe connection zipper; 3, pipe extension zipper; 4, pipe connection sealing glue layer; 5, pipe connection sealing tape; 6, pipe extension sealing glue layer; 7, pipe extension sealing tape; 8, third gap. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0043] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the embodiment of the present application provides a flexible composite wind pipe, which comprises a plurality of annular wind pipe bodies 1, a pipe connection sealing glue layer 4, a pipe connection sealing tape 5, a pipe extension sealing glue layer 6 and a pipe extension sealing tape 7.

[0044] The pipe connection zipper 2 is arranged in the length direction of the wind pipe body 1, and the pipe extension zipper 3 is arranged in the circumferential direction of the connected end of the two wind pipe bodies 1. When the pipe connection zipper 2 in the length direction of the annular wind pipe body 1 is pulled open, the wind pipe body 1 is in a sheet structure. When the pipe extension zipper 3 in the circumferential direction of the connected end of the two wind pipe bodies 1 is pulled together, the plurality of wind pipe bodies 1 form a flexible composite wind pipe. Optionally, the cross section of the annular wind pipe body 1 is rectangular, circular, elliptical or semicircular, etc.

[0045] When the jointing zipper 2 is closed, a first gap is formed between the teeth of the jointing zipper 2, and a jointing sealant layer 4 is arranged in the first gap. The jointing sealant layer 4 is formed by at least the sealant on the surface of the first gap. The jointing sealant tape 5 is attached to the duct body 1 and covers the jointing zipper 2. After the jointing zipper 2 is closed, the surface is coated with sealant to seal it. The first gap between the teeth of the jointing zipper 2 is sealed by the sealant, and the jointing sealant layer 4 is formed after the sealant is dry. The jointing sealant tape 5 is attached to the jointing zipper 2 to reinforce the sealing. The jointing zipper 2 is first coated with sealant to form the jointing sealant layer 4, and then the jointing sealant tape 5 is attached. This construction method effectively avoids the continuous impact of the high-pressure airflow in the pipe on the jointing sealant tape 5 through the first gap between the teeth of the jointing zipper 2, thereby preventing the jointing sealant tape 5 from separating from the jointing zipper 2 and achieving long-lasting sealing.

[0046] The lengthening sealant tape 7 is attached to the two adjacent end portions of the duct body 1 and covers the lengthening zipper 3. The long side of the lengthening sealant tape 7 is a free end and may not be attached to the outer surface of the duct body 1, resulting in a gap, i.e., a second gap. Therefore, the lengthening sealant layer 6 is arranged. The lengthening sealant layer 6 is formed by at least the sealant on the surface of the second gap.

[0047] After the lengthening zipper 3 is closed, the lengthening sealant tape 7 is attached to the lengthening zipper 3 and arranged along the circumference of the duct body 1. After the duct body 1 is inflated by the pressure in the pipe, the lengthening sealant tape 7 is more closely attached to the duct body 1. Even if the lengthening sealant tape 7 is continuously impacted by the high-pressure airflow in the duct body 1, it is difficult or even impossible for the lengthening sealant tape 7 to separate from the lengthening zipper 3.

[0048] Then, the sealant is applied to the joint between the free end of the lengthening sealant tape 7 and the outer surface of the duct body 1 to bond them together and reinforce the sealing. This effectively prevents the high-pressure airflow in the duct body 1 from flowing out through the third gap 8 formed at the intersection of the jointing zipper 2 and the lengthening zipper 3, achieving long-lasting sealing.

[0049] Because of the long-lasting sealing, there is no need to arrange double zippers in this application. That is, the jointing zipper 2 can be arranged only on the outside of the duct body 1 in the length direction, and the lengthening zipper 3 can be arranged only on the outside of the two end portions of the duct body 1 in the circumferential direction. This can reduce the difficulty of production and construction of the flexible composite duct sealing process.

[0050] Referring to Figure 3As shown, the joint pipe zipper 2 and the extension zipper 3 form a third gap 8 at the intersection. In some preferred embodiments, in order to effectively solve the air leakage problem at the intersection of the flexible composite wind pipe joint pipe zipper and the extension zipper, the length of the extension sealing tape 7 is greater than the length of the extension zipper 3, and the extension sealing tape 7 forms an overlapping area between the two ends of the extension sealing tape 7 after being wound on the wind pipe body 1 for at least one turn; the overlapping area covers the third gap 8.

[0051] When winding, the overlapping area corresponds to the leakage at the intersection of the joint pipe zipper and the extension zipper, and the application can effectively seal and prevent air leakage relative to the sealing by extrusion.

[0052] In the application, the material of the joint pipe sealing tape 5 and the extension sealing tape 7 is the same or different.

[0053] The material of the joint pipe sealing tape 5 has multiple options, such as air-tight tape, self-adhesive, or butyl tape.

[0054] Similarly, the material of the extension sealing tape 7 has multiple options, such as air-tight tape, self-adhesive, or butyl tape.

[0055] Using self-adhesive can be pre-set on the edge of the wind pipe body 1, which is convenient for on-site construction.

[0056] The thickness of the adhesive on the joint pipe sealing tape 5 is ≥0.8mm, which can fill and seal the recess and gap on the surface of the zipper connection, achieving sealing.

[0057] The thickness of the adhesive on the extension sealing tape 7 is ≥0.8mm, which can fill and seal the recess and gap on the surface of the zipper connection, achieving sealing.

[0058] The length of the joint pipe sealing tape 5 is the same as the length of the joint pipe zipper 2, which avoids air leakage due to ineffective sealing at some positions of the joint pipe zipper 2 caused by being too short, and also avoids the difficulty of construction caused by the excess part of the joint pipe sealing tape 5 being difficult to paste caused by being too long, and also avoids waste.

[0059] The sealing adhesive is in a fluid state, which can effectively fill the gap between the chain teeth of the joint pipe zipper and achieve sealing during adhesive application.

[0060] The adhesive strength of the sealing adhesive is ≥1MPa (GB / T 11211-2009), which can effectively integrate the free end of the extension sealing tape 7 with the joint of the wind pipe body 1, achieving sealing.

[0061] The sealing glue is a quick-drying glue, which has a surface drying time of less than or equal to 10 minutes at room temperature, a curing time of less than or equal to 24 hours when the glue coating thickness is less than or equal to 5 mm, and meets the on-site construction requirements.

[0062] The sealing glue is an elastomer after surface drying and curing, which has an elongation of greater than or equal to 100% (GB / T 528-2009), a tensile strength of greater than or equal to 1 MPa (GB / T 528-2009), and a tear strength of greater than or equal to 3 KN / m (GB / T 528-2009); when the air conditioning system is turned on and off, the flexible composite air pipe deforms, and the sealing glue can effectively offset the influence of the air pipe deformation, and the sealing performance will not be weakened.

[0063] The sealing glue has a temperature resistance range of -30℃ to 60℃, and can meet the air supply and environmental temperature requirements of the central air conditioning ventilation pipe.

[0064] The embodiment of the present application also provides a processing method of the flexible composite air pipe, which comprises the following steps:

[0065] 101: After the jointing zipper 2 in the length direction of the air pipe body 1 is pulled, the sealing glue is coated to fill the first gap, and after the sealing glue is surface dried to form a jointing sealing glue layer 4, a jointing sealing tape 5 is pasted on the air pipe body 1 to cover the jointing zipper 2.

[0066] 102: After the lengthening zipper 3 in the circumferential direction of the end portions of the two air pipe bodies 1 is pulled, a lengthening sealing tape 7 is pasted on the end portions of the two adjacent air pipe bodies 1 to cover the lengthening zipper 3; then the sealing glue is coated to fill the second gap, and after the sealing glue is surface dried, a lengthening sealing glue layer 6 is formed.

[0067] In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise specified and limited, the terms "mounting", "connection", and "connection" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, and can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0069] The foregoing is considered as illustrative only of the principles of the application. Numerous modifications and changes will readily occur to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flexible composite air duct, characterized by, It comprises: a plurality of annular duct bodies (1) provided with a jointing zipper (2) in the length direction, and a lengthening zipper (3) in the circumferential direction of the end of the two duct bodies (1); a jointing sealant layer (4) formed by at least the surface drying of the sealant filled in the first gap formed between the teeth of the jointing zipper (2); a jointing sealant tape (5) adhered to the duct body (1) and covering the jointing zipper (2); a lengthening sealant tape (7) adhered to the end of the two adjacent duct bodies (1) and covering the lengthening zipper (3); a lengthening sealant layer (6) formed by at least the surface drying of the sealant filled in the second gap formed between the free end of the lengthening sealant tape (7) and the outer surface of the duct body (1).

2. The flexible composite duct according to claim 1, wherein: a third gap (8) is formed at the intersection of the jointing zipper (2) and the lengthening zipper (3); the length of the lengthening sealant tape (7) is greater than the length of the lengthening zipper (3), and the lengthening sealant tape (7) is wound at least one turn on the duct body (1) to form an overlapping area between the two ends of the lengthening sealant tape (7); the overlapping area covers the third gap (8).

3. The flexible composite duct according to claim 1, wherein: the jointing sealant tape (5) and the lengthening sealant tape (7) are made of the same or different materials.

4. The flexible composite duct according to claim 3, wherein: the jointing sealant tape (5) is made of air-tight tape, self-adhesive tape or butyl tape; and / or, the lengthening sealant tape (7) is made of air-tight tape, self-adhesive tape or butyl tape.

5. The flexible composite duct according to claim 1, wherein: the thickness of the glue on the jointing sealant tape (5) is ≥0.8mm.

6. The flexible composite duct according to claim 1, wherein: the thickness of the glue on the lengthening sealant tape (7) is ≥0.8mm.

7. The flexible composite duct according to claim 1, wherein: the length of the jointing sealant tape (5) is the same as the length of the jointing zipper (2).

8. The flexible composite duct according to claim 1, wherein: the adhesive strength of the sealant is ≥1MPa; and / or, the sealant is a quick-drying glue, the surface drying time of which is ≤10 minutes at room temperature, and the curing time of which is ≤24 hours when the coating thickness is ≤5mm.

9. The flexible composite duct according to claim 1, wherein: the sealant is an elastomer after surface drying and curing, the elongation of which is ≥100%, the tensile strength of which is ≥1MPa, and the tear strength of which is ≥3KN / m; and / or, the temperature resistance range of the sealant is -30℃-60℃.

10. The flexible composite duct according to claim 1, wherein: the jointing zipper (2) is provided on the outer side of the duct body (1) in the length direction. The extension zipper (3) is arranged on the outer side of the end portion of the two wind pipe bodies (1) connected in the circumferential direction.

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