CN220494419U - Open-tail zipper with interchangeable plug and flexible air duct system - Google Patents

Abstract

The application relates to an open-tail zipper with interchangeable plug and a flexible air duct system, wherein the plug and the plug have the same structure and comprise a zipper code strip; the zipper teeth are arranged on one side edge of the zipper strip in the width direction of the zipper strip, and the fixed square blocks and the bolts are respectively arranged at the two ends of the zipper teeth in the arrangement direction; distinguishing the tape head from the plug according to the connection position of the pull head; when the plug is connected with the tape head by the pull head, the fixed square block of the plug is used as the end point of the pull head, and the fixed square block of the tape head is used as the starting point of the pull head; therefore, the fixed square blocks are not divided into the upper stop blocks and the lower stop blocks, so that the two flexible air pipes have no directivity when being connected, the directions of the zippers do not need to be checked in the processing process of the flexible air pipes, and the front and back position exchange is convenient; the zipper can be cut from any end to maintain the integrity of the zipper, and the cutting position is not limited, so that benefits are generated in the manufacturing and actual construction use process of the flexible air pipe.

Description

Open-tail zipper with interchangeable plug and flexible air duct system

Technical Field

The application relates to the technical field of air pipes, in particular to an open-tail zipper with interchangeable plug heads and a flexible air pipe system.

Background

In a central air-conditioning flexible air duct system, a standard air duct unit is generally closed through a zipper, specifically, the closed is performed through a split zipper, the common split zipper consists of a plug and a tape head, namely, the plug is arranged on one side, the tape head is arranged on the other side, the standard air duct unit is a sheet material during production and delivery, and a cylindrical pipe is synthesized through the zipper during installation and use; the existing common open-end zipper has different structures at two ends, namely one end is a lower end and the other end is an upper end, so that the zipper has directivity.

Because the zipper structures at the two ends of the standard air pipe unit are different, the air pipe has directivity, and the front end and the rear end cannot be replaced at will; the direction of the zipper needs to be checked in the process of sewing the zipper of the air pipe, the risk of sewing quality is increased, when the front and back replacement is needed in a construction site, the whole air pipe is obviously replaced, and the construction difficulty is increased.

Moreover, the length of the standard air pipe unit is the standard length, the actual demand length of the engineering site is uncertain, the standard air pipe unit is required to be shortened, and because the closed pipe zipper is sewn along the length direction of the air pipe, the standard air pipe unit can only be cut from the upper stop end of the zipper, the integrity of the lower stop end zipper is reserved, the cutting position is greatly limited, and meanwhile, the cut air pipe cannot be reused, so that great waste is caused.

Disclosure of Invention

The embodiment of the application provides an open-end zipper with interchangeable plug and a flexible air duct system, which are used for solving the problems that the zipper structures at two ends of a standard air duct unit in the related art are different, the air duct has directivity, and certain influence is caused in the manufacturing production process and the construction process.

In a first aspect, there is provided a split zipper with interchangeable tape tabs, comprising:

the two zipper strips are provided with zipper teeth on one side edge, and fixing blocks and bolts are respectively arranged on the two ends of the zipper strips in the arrangement direction of the zipper teeth;

the pull head is provided with two guide chain cavities; one of the guide chain cavities of the pull head is arranged on the zipper teeth of one of the zipper code belts so that the zipper code belts become the belt head, the other zipper code belt becomes the plug, the plug pin of the plug pin is penetrated by the other guide chain cavity of the pull head, and the travelling direction of the pull head on the belt head is the direction from the fixed square block of the belt head to the plug pin.

In some embodiments, the fixing block is fixedly connected with the zipper code belt, and a first slot is arranged on the fixing block;

the bolt with the head is spliced with a first slot of the plug; the bolt of the plug is inserted into the first slot with the head.

In some embodiments, the fixing block is detachably connected with the zipper code belt, and a first slot is formed in the fixing block;

the bolt with the head is spliced with a first slot of the plug; the bolt of the plug is inserted into the first slot with the head.

In some embodiments, two ends of the zipper code belt with the head are provided with bolts; the fixed square with the head is also provided with a second slot, and the fixed square with the head is spliced with one of two bolts with the head through the second slot;

both ends of the zipper code belt of the plug are provided with bolts; the fixed block of the plug is also provided with a second slot, and the fixed block of the plug is spliced with one of two bolts of the plug through the second slot.

In some embodiments, the fixing block is provided with a notch groove communicated with the first slot and the second slot on a side edge of the zipper code strip in the width direction, and the notch groove is used for accommodating the end part of the zipper code strip.

In some embodiments, the material of the fastener element and the fixing block comprises nylon, resin or metal.

In some embodiments, the number of the pull heads is one or two; the pull head is detachably connected to the plug or the belt head through a bolt.

In a second aspect, there is provided a flexible ductwork system comprising:

the standard air duct units are connected with each other through split zippers with interchangeable plugs.

In some embodiments, the standard ductwork unit comprises a rectangular sheet of material that is brought together by the split zipper of any of the claims that is interchangeable with a plug.

In some embodiments, the standard air duct unit comprises an air duct straight pipe, an air duct horizontal tee, an air duct vertical tee, an air duct horizontal elbow, or an air duct vertical elbow.

The beneficial effects that technical scheme that this application provided brought include:

the embodiment of the application provides an open-tail zipper with interchangeable plug and a flexible air duct system, wherein the plug of the open-tail zipper and the plug of the tape head have the same structure, and the plug comprises a zipper code tape; the zipper teeth are arranged on one side edge of the zipper strip in the width direction of the zipper strip, and the fixed square blocks and the bolts are respectively arranged at the two ends of the zipper teeth in the arrangement direction; the structure is characterized in that the belt head and the plug are distinguished according to the connection position of the pull head; when the pull head connects the plug with the belt head, the plug and the bolt with the head respectively pass through the two chain guide cavities of the pull head; the fixed square of the plug is used as the end point of the running of the pull head, and the fixed square of the belt head is used as the starting point of the running of the pull head; because the plug and the structure of the belt head are the same, the upper stop block and the lower stop block are not separated from the fixed square, so that the two flexible air pipes have no directivity when being connected, the directions of the zippers do not need to be checked in the processing process of the flexible air pipes, the front and back position exchange is convenient, and the production quality is ensured; the split-tail zipper can be closed from bottom to top and also can be closed from top to bottom, so that the zipper can be cut from any end to the air pipe through the above structural design as a closed pipe zipper, the integrity of the zipper is still maintained, and the cutting position is not limited, thereby producing benefits in the manufacturing and practical construction use processes of the flexible air pipe.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a split zipper with interchangeable tape tabs provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a single standard air duct unit tube combining structure using a split zipper with interchangeable plugs according to an embodiment of the present application;

fig. 3 is a schematic diagram of the standard duct unit provided in the embodiment of the present application after being cut and utilized by the split zipper with interchangeable tape tabs.

In the figure: 1. a pull head; 2. a zipper code strip; 3. zipper teeth; 4. fixing the square blocks; 5. a plug pin; 6. rectangular sheet.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

During the manufacturing and production process:

because the zipper structures at the two ends of the standard air pipe unit are different, the air pipe has directivity, and the front end and the rear end cannot be replaced at will; the air pipe needs to check the direction of the zipper in the process of sewing the zipper of the pipe, so that the risk and the efficiency of sewing quality are increased; in addition, the above structures are different, so that the types and specifications of accessories are required to be manufactured in batches and stored separately, and a certain difficulty is added to warehouse management and production procedures.

In an actual engineering construction site, the standard air duct unit may need to be exchanged back and forth due to the following several conditions:

for example, the air pipe straight pipe is provided with an opening for air outlet, the openings on the left side and the right side of the air pipe straight pipe are asymmetric, and the opening direction needs to be changed in the engineering site. The direction of the branch pipe of the air pipe horizontal tee joint is required to be exchanged, namely the direction of the air pipe horizontal left/right tee joint is exchanged. The vertical tee joint of the air pipe needs to change the direction of the branch pipe, namely, the direction of the vertical upper/lower tee joint of the air pipe is changed. The direction of the branch pipe needs to be exchanged for the horizontal elbow of the air pipe, namely the direction of the horizontal left/right elbow of the air pipe is exchanged. The vertical elbow of the air pipe needs to change the direction of the branch pipe, namely the direction of the vertical upper/lower elbow of the air pipe is changed. If the traditional split zipper structure is adopted, in the practical engineering, a new air pipe is additionally adopted to meet the requirement, or the direction is adjusted after the whole split zipper structure is detached.

There are also the following needs in actual engineering construction sites:

the length of standard tuber pipe unit production is standard length, and there is uncertainty in the on-the-spot actual demand length of engineering, need to shorten standard tuber pipe unit, owing to make up a tub zip fastener along tuber pipe length direction, only can decide from the upper end of end that stops of zip fastener, remain the integrality of lower end zip fastener, and the cutting position receives very big limitation, and the tuber pipe of deciding simultaneously can't be reused, causes very big waste.

Therefore, the embodiment of the application provides an open-end zipper with an interchangeable plug and a flexible air duct system, so as to solve the problems that the zippers at two ends of a standard air duct unit in the related art are different in structure, the air duct has directivity, the front end and the rear end cannot be randomly exchanged, and certain influence exists in the manufacturing production process and the construction process.

Referring to fig. 1-3, an interchangeable split-tail slide fastener comprising:

the two zipper strips 2 are provided with zipper teeth 3 on one side edge of the zipper strips 2, and two ends of the zipper strips 2 in the arrangement direction of the zipper teeth 3 are respectively provided with a fixed square 4 and a bolt 5;

a slider 1 having two guide cavities; one of the guide cavities of the slider 1 is arranged on the zipper teeth 3 of one of the zipper strips 2 so that the zipper strip 2 becomes a tape head, the other zipper strip 2 becomes a plug, the other guide cavity of the slider 1 is used for the plug pin 5 of the plug to pass through, and the travelling direction of the slider 1 on the tape head is the direction from the fixed square 4 of the tape head to the plug pin 5.

In the structure, the plug and the tape head are determined according to the use condition, namely the zipper tape 2 where the pull head is positioned is considered as the tape head, and the other is the plug; so that the use is not divided into positive and negative sides; in addition, the plug and the tape head are identical in structure and are provided with the fixed square 4 and the bolt 5, so that the traditional upper stop block and the traditional lower stop block are omitted, and the direction is not split.

When the pull head 1 connects the plug with the belt head, the plug and the bolt 5 with the head respectively pass through the two chain guide cavities of the pull head; the fixed block 4 of the plug is used as the running end point of the pull head 1, and the fixed block 4 of the belt head is used as the running start point of the pull head 1; because the plug and the structure of the belt head are the same, the fixed square 4 does not divide the upper stop block and the lower stop block, so that the two flexible air pipes have no directivity when being connected, the flexible air pipes do not need to check the zipper direction in the processing process, the front and back position exchange is convenient, the forward and backward directions do not need to be considered in the sewing process, and the production quality is ensured; the split-tail zipper can be closed from bottom to top and can also be closed from top to bottom;

through the structural design, the air pipe can be cut from any end by taking the zipper as the closed pipe, the zipper of the rest section of air pipe is not directional, the integrity of the zipper is still maintained, and the zipper can be reused; the cutting position is not limited, so that benefits are generated in the manufacturing and actual construction use process of the flexible air pipe.

In some preferred embodiments, there are two ways for the connection form of the fixing block 4 to the zip code 2:

first, and most preferred, is one embodiment:

the fixed square 4 is fixedly connected with the zipper code strip 2 and is provided with a first slot; the plug pin 5 with the head is spliced with a first slot of the plug; the plug pin 5 of the plug is inserted into the first slot with the head.

In this embodiment, the structural components of the entire zipper are divided into two types as a whole, namely, one type is a slider and the other type is a plug and a tape head, and the plug and the tape head have the same structure; therefore, the method not only brings convenience in the use process, but also further reduces the specification of the product parts, is convenient to manage and reduces the occupancy of a warehouse.

The second, fixed square 4 is connected with the zipper code 2 detachably, and there is the first slot on it; the plug pin 5 with the head is spliced with a first slot of the plug; the plug pin 5 of the plug is inserted into the first slot with the head.

The specific detachable connection form is as follows:

two ends of the zipper code belt 2 with the head are provided with bolts 5; the fixed square 4 with the head is also provided with a second slot, and the fixed square 4 with the head is spliced with one of two bolts 5 with the head through the second slot; two ends of the zipper code strip 2 of the plug are provided with bolts 5; the fixed block 4 of the plug is also provided with a second slot, and the fixed block 4 of the plug is spliced with one of two bolts 5 of the plug through the second slot.

In the above structural form, the fixing block 4 is provided with a notch groove communicated with the first slot and the second slot on the side edge of the width direction of the zipper strip 2, and the notch groove is used for accommodating the end part of the zipper strip 2.

On the basis of the above, the zipper teeth 3 and the fixing blocks 4 are made of nylon, resin or metal.

In some preferred embodiments, the number of sliders 1 is one or two; the pull head 1 is detachably connected to the plug and the belt head through a bolt 5. The slider 1 can be pulled out from the latch 5 of the fastener tape 2.

The structure can enable the slider 1 to be arranged at one end of the open-end zipper, also can be arranged at the other end of the open-end zipper, and can be simultaneously provided with two sliders at two ends of the open-end zipper to be pulled in the middle of the open-end zipper.

It should be understood that the extensions of the present application should also have the following form;

the two zipper strips 2 are provided with zipper teeth 3 on one side edge of the zipper strips 2, and two ends of the zipper strips 2 in the arrangement direction of the zipper teeth 3 are respectively provided with a fixed square 4 and a bolt 5; and two jacks are arranged on the movable square. The pull head 1 is provided with two guide chain cavities; one of the guide cavities of the slider 1 is arranged on the zipper teeth 3 of one of the zipper strips 2 so that the zipper strip 2 becomes a head, the other zipper strip 2 becomes a plug, and the other guide cavity of the slider 1 is used for the plug pin 5 of the plug to pass through; in normal connection, two fixing blocks 4 are arranged in parallel; the plug and the bolt with the head are respectively inserted into the jack of the movable square. The direction of travel of the slider 1 on the tape head is from the movable block to the fixed block 4. In the mode, a movable square block is added on the basis of the fixed square block 4 and the bolt 5, so that the use method is changed, but the connection can be realized in a non-positive and non-negative way. When the direction is switched, the fixed square blocks 4 are not arranged in parallel, at the moment, the movable square blocks are connected with the bolts 5 with heads in an inserting mode, and the movable square blocks are connected with the fixed square blocks 4 of the plugs.

The application also proposes a flexible ductwork system comprising a plurality of standard ductwork units; two adjacent standard air duct units are connected through the split-tail zipper with the interchangeable plug.

So that the directions of two adjacent standard air duct units can be randomly changed, and the split-tail zipper can be stopped from bottom to top and can also be stopped from top to bottom, therefore, the air duct can be cut from any end as a closed-duct zipper, the integrity of the zipper is still maintained, the cutting position is not limited, the cut air duct can maintain the integrity of the zipper by adding a pull head 1, the reutilization of the air duct is realized, and the waste is avoided.

Further, the standard air duct unit comprises a rectangular sheet 6, and the rectangular sheet 6 is combined through the split zipper with the interchangeable plug heads; therefore, the pipe closing process is not influenced by the adjusting direction, and the on-site construction is convenient to meet. Wherein the standard air duct unit comprises an air duct straight pipe, an air duct horizontal tee joint, an air duct vertical tee joint, an air duct horizontal elbow or an air duct vertical elbow.

It should be appreciated that conventional split zippers have the following disadvantages due to:

during the production and manufacturing process:

because the zipper of the tube is directional, the air duct needs to check the zipper direction in the process of sewing the zipper of the tube, thereby increasing the risk of sewing quality. The number of the product types and the specifications is the plugs and the tape heads with different structures, so that the storage management is complex, and the product standardization and the market popularization and use are not facilitated.

In the actual use process:

because the standard air pipe unit is used for producing the standard length, the actual length of the engineering site is uncertain, the standard air pipe unit is required to be shortened, and because the closed pipe zipper is sewn along the length direction of the air pipe, the standard air pipe unit can only be cut from the upper stop end of the zipper, the integrity of the lower stop end zipper is reserved, and the cutting position is greatly limited. Meanwhile, the cut air pipe cannot be reused, so that great waste is caused. Because of the different zipper structures at the two ends of the standard air duct unit, the air duct has directivity, and the front end and the rear end cannot be replaced at will. In actual engineering, however, it may be necessary to exchange standard duct units back and forth due to several conditions, such as:

I. the air pipe straight pipe is provided with an opening air outlet, openings on the left side and the right side of the air pipe straight pipe are asymmetric, and the opening direction needs to be changed in engineering sites. II. The direction of the branch pipe of the air pipe horizontal tee joint is required to be exchanged, namely the direction of the air pipe horizontal left/right tee joint is exchanged. III, the vertical tee joint of the air pipe needs to change the direction of the branch pipe, namely the direction of the vertical upper/lower tee joint of the air pipe is exchanged. IV, the horizontal elbow of the air pipe needs to change the direction of the branch pipe, namely the horizontal left/right elbow direction of the air pipe is exchanged. V, the vertical elbow of the air pipe needs to change the direction of the branch pipe, namely, the vertical upper/lower elbow direction of the air pipe is exchanged. The traditional split-tail zipper cannot be used for changing the direction due to the directivity, namely, the zipper cannot be connected after the direction is changed.

The present application thus also proposes a method for manufacturing the above slider-interchangeable open-ended slide fastener, embodied as a manufacturing process and a use process.

A manufacturing method of a split zipper with interchangeable plug for flexible air pipes comprises the following steps:

the zipper teeth 3 are arranged on one side of the width direction of the zipper code strip 2, and the zipper teeth 3 are uniformly distributed along the length direction of the zipper code strip 2;

the same side of the zipper teeth 3 on the zipper code belt 2 is provided with a bolt 5 at one end of the zipper code belt 2 in the length direction; the same side of the zipper teeth 3 on the zipper code belt 2 is provided with a fixed square 4 at the other end of the zipper code belt 2 in the length direction so as to form a repeated structure; wherein, the fixed square 4 is provided with a slot for connecting with the bolt 5; the material of the fastener element 3 and the fixing block 4 comprises nylon, resin or metal.

Repeating the steps to produce a plurality of repeating structures;

any two repeated structures are selected, and a slider 1 is combined to form a split zipper with interchangeable plugs. The method specifically comprises the following steps: passing a bolt 5 of one of the repeating structures through a guide cavity of the slider 1 to form a tape head; a bolt 5 with another repeated structure is used as a plug to pass through the other chain guide cavity of the pull head 1; the plug pin 5 of the plug is inserted into the slot of the fixed square 4 with the head, and the plug pin 5 with the head is inserted into the slot of the fixed square 4 of the plug, so as to form a split zipper with interchangeable plug heads. After a plurality of repeating structures are manufactured, the repeating structures are stored in a parts warehouse of the same specification.

Therefore, in the manufacturing process, the directivity is not required to be considered, the structures of the plug and the belt head are unified, the same structure is made, the number of product types and specifications is reduced, and the storage management is convenient, so that the product standardization and the market popularization and the use are facilitated.

The use method of the split zipper with the interchangeable plug heads for the flexible air pipes comprises the following steps:

sewing a repeated structure at two ends of the standard air pipe unit respectively, and then connecting the two adjacent repeated structures through the pull head 1 to finish the pipe combination of the two adjacent standard air pipe units;

when the front end and the rear end of one standard air duct unit in two adjacent standard air duct units after the pipe combination are required to be exchanged, the specific steps are as follows:

separating two adjacent standard air duct units, and then retaining the pull head 1 on the standard air duct units which do not need to be exchanged to form a belt head; namely, the repeated structure and the pull head 1 on the standard air pipe unit which do not need to be exchanged are used as a belt head;

the standard air duct unit with the direction required to be changed is directly changed, the repeated structure is used as a plug, the plug pin 5 of the plug is inserted into the slot of the fixed square 4 with the head, and the plug pin 5 with the head is inserted into the slot of the fixed square 4 with the plug, so that the direction changing operation is completed.

The steps enable the split zipper with the structure to be capable of closing a pipe and changing directions.

Wherein for standard air duct units, the following two forms are also used when cutting:

first, the standard air duct unit is of an integral cylindrical structure, and the cylindrical air duct is not formed by a zipper. When the standard air duct unit needs to be cut at any length, the standard air duct unit comprises the following steps:

cutting a standard air pipe unit to form a residual section and a waste section;

sewing a repeated structure on the cutting end of the rest section, and then connecting the repeated structure as a plug or a belt head with a standard air pipe unit to be connected; and sewing a repeated structure on the cutting end of the waste section to form an available air duct unit with a length smaller than that of a standard air duct unit.

Second, the form of the standard duct unit is formed by the split zipper of the present application, specifically:

sewing a repeated structure on two opposite side edges of an air duct sheet respectively, and enabling a bolt 5 of one repeated structure and a fixed square 4 of the other repeated structure to be positioned on the same side; passing a bolt 5 of one of the repeating structures through a guide cavity of the slider 1 to form a tape head; a bolt 5 with another repeated structure is used as a plug to pass through the other chain guide cavity of the pull head 1; the flexible ductwork sheet is then formed into a standard ductwork unit using the slider 1.

When the standard air duct unit needs to be cut at any length, the method comprises the following steps:

cutting a standard air pipe unit to form a residual section and a waste section;

mounting a fixed square 4 at the cutting position of the two repeated structures of which the remaining sections are cut so as to ensure that the remaining sections form a stable first cylinder structure when the slider 1 connects the two repeated structures of which the cutting is performed; sewing a repeating structure on the cutting end of the first cylinder structure, wherein the repeating structure is circular; then the repeated structure is used as a plug or a belt head to be connected with a standard air duct unit to be connected with the repeated structure;

mounting a fixing square 4 at the cutting position of the two repeated structures of the waste section to ensure that the waste section forms a stable second cylinder structure when the slider 1 connects the two repeated structures of the waste section; and sewing a repeated structure on the cutting end of the second cylinder structure to form an available air duct unit with the length smaller than that of the standard air duct unit. The fixing square 4 is added on the residual section and the waste section, so that the movement of the pull head 1 is limited, and the first barrel structure and the second barrel structure are ensured not to be scattered when the pull head 1 tightens the zipper.

The above cutting process is equivalent to the split zipper of the traditional structure after being cut, and the upper stop block needs to be additionally arranged, so that the split zipper can be cut in any structure with random length, and is convenient for demands in the practical use process.

Therefore, the application scene of the split zipper with interchangeable plug heads can be summarized as the following scene: application scenario one:

the wind pipe production scene is as follows: the production and sewing of the tube closing/connecting zipper do not need to consider a tape plug, and the quality risk is less.

And (2) an application scene II:

air duct installation scene: the tuber pipe is connected and is not required to check the plug, and the efficiency of construction is higher.

And (3) an application scene III:

air duct installation scene: the air pipe can be used by turning around at will, and the product universality is higher.

And application scene IV:

air duct inventory and sales scenarios: the air pipe is not divided in the front-back direction, so that the number of product types and specifications is less, and the product standardization and market popularization and use are facilitated. A schematic diagram of the utilization of the split zipper with interchangeable tape tabs between standard duct units provided in the embodiment of the present application after being cut can be referred to in fig. 3.

Application scenario five:

1. scene one of air pipe field change: the air pipe can cut any end according to the requirements, is not limited by the closed pipe zipper, and has higher flexibility.

2. Scene two of changing air pipe on site: the air pipe cut by the air pipe can be reused, and waste is avoided.

The application scene shows that the split zipper with the interchangeable plug has the technical effects on the flexible air pipe in the manufacturing and production processes and the actual use process of the flexible air pipe, and has the advantages in the manufacturing cost and economy.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

It should be noted that in this application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation 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 may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present 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 (10)

1. A split zipper with interchangeable insert heads, comprising:

the two zipper strips (2), wherein zipper teeth (3) are arranged on one side edge of the zipper strips (2), and fixed blocks (4) and bolts (5) are respectively arranged on the two ends of the zipper strips (2) in the arrangement direction of the zipper teeth (3);

a slider (1) having two guide cavities; one of the guide chain cavities of the pull head (1) is arranged on the zipper teeth (3) of one of the zipper code belts (2) so that the zipper code belt (2) becomes a belt head, the other zipper code belt (2) becomes a plug, the plug pin (5) of the plug is provided to pass through the other guide chain cavity of the pull head (1), and the travelling direction of the pull head (1) on the belt head is the direction from the fixed square (4) of the belt head to the plug pin (5).

2. The insert pin interchangeable open-ended zipper of claim 1, wherein:

the fixed square block (4) is fixedly connected with the zipper code strip (2) and is provided with a first slot;

a bolt (5) with a head is spliced with a first slot of the plug; the bolt (5) of the plug is inserted into the first slot with the head.

3. The insert pin interchangeable open-ended zipper of claim 1, wherein:

the fixed square block (4) is detachably connected with the zipper code strip (2), and a first slot is formed in the fixed square block;

a bolt (5) with a head is spliced with a first slot of the plug; the bolt (5) of the plug is inserted into the first slot with the head.

4. The insert pin interchangeable open-ended zipper of claim 3, wherein:

two ends of the zipper code belt (2) with the head are provided with bolts (5); the fixed square (4) with the head is also provided with a second slot, and the fixed square (4) with the head is spliced with one of two bolts (5) with the head through the second slot;

two ends of the zipper code belt (2) of the plug are provided with bolts (5); the fixed square (4) of the plug is also provided with a second slot, and the fixed square (4) of the plug is spliced with one of two bolts (5) of the plug through the second slot.

5. The insert pin interchangeable open-ended zipper of claim 4, wherein:

the fixing square block (4) is provided with a notch groove communicated with the first slot and the second slot on the side edge of the width direction of the zipper code strip (2), and the notch groove is used for accommodating the end part of the zipper code strip (2).

6. The insert pin interchangeable open-ended zipper of claim 1, wherein:

the zipper teeth (3) and the fixing square blocks (4) are made of nylon, resin or metal.

7. The insert pin interchangeable open-ended zipper of claim 1, wherein:

the number of the pull heads (1) is one or two; the pull head (1) is detachably connected to the plug or the belt head through a bolt (5).

8. A flexible ductwork system, comprising:

a plurality of standard ductwork units, two adjacent standard ductwork units being connected by a split zipper with interchangeable plugs as claimed in any one of claims 1 to 6.

9. The flexible ductwork system according to claim 8, characterized in that:

the standard air duct unit comprises a rectangular sheet (6), wherein the rectangular sheet (6) is combined by the split zipper with the interchangeable plug according to any one of claims 1 to 6.

10. The flexible ductwork system according to claim 8, characterized in that:

the standard air pipe unit comprises an air pipe straight pipe, an air pipe horizontal tee joint, an air pipe vertical tee joint, an air pipe horizontal elbow or an air pipe vertical elbow.