CN113846403A - Water hose and integrated forming process thereof - Google Patents
Water hose and integrated forming process thereof Download PDFInfo
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- CN113846403A CN113846403A CN202110985264.7A CN202110985264A CN113846403A CN 113846403 A CN113846403 A CN 113846403A CN 202110985264 A CN202110985264 A CN 202110985264A CN 113846403 A CN113846403 A CN 113846403A
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- weaving machine
- circular weaving
- fabric layer
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D11/00—Double or multi-ply fabrics not otherwise provided for
- D03D11/02—Fabrics formed with pockets, tubes, loops, folds, tucks or flaps
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
- D03D13/008—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft characterised by weave density or surface weight
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/30—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the fibres or filaments
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D37/00—Circular looms
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D49/00—Details or constructional features not specially adapted for looms of a particular type
- D03D49/04—Control of the tension in warp or cloth
- D03D49/20—Take-up motions; Cloth beams
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
The invention provides a water hose and an integrated forming process thereof, wherein the integrated forming process controls the motor speed of a circular weaving machine to synchronously weave by two machines according to the weft density required by a belt blank process under the Programmable Logic Controller (PLC) program control through a synchronous control technology so as to achieve the effect of two layers of belt blanks, and after the integrated forming process is used, repeated traction is not needed, so that the yield of the water hose can be improved by 20%, the waste of the belt blanks and lining rubber pipes is reduced by 10%, and the qualified rate is improved by 0.5%.
Description
Technical Field
The invention relates to a processing technology of a water hose, in particular to a water hose and an integrated forming technology thereof.
Background
The double-layer fabric water hose required by market customers has excellent high pressure resistance and wear resistance, is a preferred water hose in some special occasions, needs to drag a belt blank twice during production of the conventional double-layer fabric water hose, is repeatedly wasted in action, does not generate value, has large resistance and inconsistent elongation during traction, is easy to scratch or scrape the belt blank, is easy to wrinkle an inner liner to generate defective products, has inconsistent length of the belt blank, causes waste of the belt blank, and has low production efficiency and low yield.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a water hose and an integrated forming process thereof.
In order to achieve the above objects and other objects, the present invention includes the following technical solutions: the invention provides an integrated forming process of a water hose, which comprises the following steps: providing a water hose forming implementation device, wherein the water hose forming implementation device comprises a first circular weaving machine, a second circular weaving machine, a vulcanizing oven, a PLC (programmable logic controller) and a winding machine; the first circular weaving machine and the second circular weaving machine are arranged in the same vertical direction, the first circular weaving machine is positioned right above the second circular weaving machine, holes for the first fabric layer, the second fabric layer and the inner liner to pass through are formed in the middle of the first circular weaving machine and the second circular weaving machine, the circle centers of the upper holes of the first circular weaving machine and the second circular weaving machine are on the same vertical line, a vulcanizing oven and a winding machine are arranged at the outlet of the second circular weaving machine, the PLC is electrically connected with the first circular weaving machine, the second circular weaving machine and the winding machine, and the PLC controls the rotation frequency of motors on the first circular weaving machine, the second circular weaving machine and the winding machine so as to realize the integrated forming of the water hose;
starting the first circular weaving machine to form the second fabric layer, embedding the lining layer into the second fabric layer to obtain a first water hose semi-finished product, and vertically and downwards drawing the first water hose semi-finished product;
starting the second circular weaving machine to form the first fabric layer, enabling the first water hose semi-finished product to enter a hole of the second circular weaving machine from the hole of the first circular weaving machine, and embedding the first water hose semi-finished product into the first fabric layer and simultaneously drawing the first water hose semi-finished product and the inner liner layer to obtain a second water hose semi-finished product; and
and filling air into the inner lining layer pipe, vulcanizing the second water band semi-finished product by using the vulcanizing oven, and winding by using a winding machine to obtain the water band.
In one embodiment, the vertical distance between the first circular weaving machine and the second circular weaving machine is 1.6-1.8 m.
In one embodiment, the difference between the diameter of the hole in the second circular knitting machine and the diameter of the hole in the first circular knitting machine is 2-4 mm.
In one embodiment, the weft density of the second fabric layer is 20-40, and the fineness of the yarn used for the second fabric layer is 30000-40000D.
In one embodiment, the inner diameter and the yarn fineness of the second fabric layer are kept constant, and the rotating frequency of a motor on the winding machine is kept constant and is greater than that of a motor on the first circular weaving machine as the weft density of the second fabric layer is increased.
In one embodiment, the length of the vulcanizing oven is 20-30 m, and the vulcanizing speed of the second water belt semi-finished product in the vulcanizing oven is 3-6 m/min.
In one embodiment, the vulcanization temperature in the vulcanization oven is 120-130 ℃, and the pressure of air in the inner liner pipe is 0.11-0.13 MPa.
In one embodiment, a shutdown cop-changing identification supplement equivalent is arranged in the PLC.
The invention also provides the water band prepared by the integral forming process.
In one embodiment, the hose is a fire hose.
As described above, the invention provides the integrated forming process of the water hose, which can directly avoid two traction processes in the production of the double-layer fabric water hose, reduce the waste of working procedures, save the cost and improve the product quality and the qualification rate. The invention adopts the technology of concentric and synchronous control of holes, under the programmable control of a PLC, the rotating speed of related motors is controlled according to the weft density required by the strip billet process, the strip billet woven by an upper circular weaving machine enters the hole of a lower circular weaving machine, and the strip billets of two weaving machines are drawn out by the same winding machine.
On the other hand, the lining rubber hose is placed in the hole of the upper round weaving machine and is simultaneously pulled, air with certain pressure is added into the lining rubber hose after the pulling, the lining rubber hose is vulcanized by a vulcanizing oven, and the double-layer water hose is directly produced by controlling the vulcanizing temperature and time, so that the effect of automatically producing the water hose is achieved. After the invention is used, the water hose production does not need repeated traction, the yield is improved by 20 percent, the waste of the hose blank and the lining rubber hose is reduced by 10 percent, the qualification rate is improved by 0.5 percent, and the phenomena of lining crease and outer layer belt blank scratching or scraping are avoided.
Drawings
Fig. 1 shows a schematic structural view of the water hose of the present invention.
Fig. 2 shows a partial structural view of the water hose of the present invention.
Fig. 3 is a view showing a positional relationship between a first circular knitting machine and a second circular knitting machine according to the present invention.
Fig. 4 is a schematic structural diagram of the forming implementation device of the present invention.
FIG. 5 is a schematic view showing the structure of the vulcanizing oven of the present invention.
Detailed Description
Referring to fig. 1 to 5, embodiments of the present invention are described below with specific examples, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Note that "%" and "part(s)" shown herein mean "% by mass" and "part(s) by mass", respectively, unless otherwise specified.
As shown in fig. 1 and 2, the present invention provides a water hose 100, wherein the water hose 100 may be a fire hose 100, and the water hose 100 may be a flexible coilable round or flat tubular body having a certain length, which is formed by combining a cylindrical fabric layer woven by warp and weft yarns and a liner through steam vulcanization or an adhesive. Further, the water hose 100 of the present invention may be a double-layer fabric water hose 100, and specifically may include a first fabric layer 101, a first fabric layer 102, and an inner liner 103, where the first fabric layer 101 and the second fabric layer 102 are sleeved together to form a fabric double-layer structure, and the fabric double-layer structure has greater performance advantages in pressure resistance, wear resistance and the like than a single-layer structure, and the first fabric layer 101 and the first fabric layer 102 may be framework layers of the fire hose 100, and may provide high pressure resistance and wear resistance for the water hose 100, and the water hose 100 of the present invention mainly has a pressure bearing function of the second fabric layer 102, so that the pressure bearing of the second fabric layer 102 is primarily considered in design, in an embodiment, the yarn fineness of the second fabric layer 102 may be 30000 to 40000D, such as 32000D, 33000D, 35000D and the like, the yarn fineness of the first fabric layer 101 may be equal to the yarn fineness of the second fabric layer 102, the weft density of the second fabric layer 102 may be 20-40, and the weft density may refer to the number of wefts per 10cm of water band length. The skeleton layer is generally woven by fiber materials such as cotton, polyester and terylene, the lining layer 103 can be a waterproof layer which is smooth and has certain strength on the inner wall of the second fabric layer 102, so that smooth conveying of water or other liquid is ensured, and the used materials are mainly rubber, PVC, TPU and the like. In some embodiments, the weft density of the first fabric layer 101 may be equal to or less than the weft density of the second fabric layer 102, and the water hose 100 of the present invention may be suitable for application fields under some complex conditions, such as harsh environments in use conditions of oil fields and coal mines.
As shown in fig. 2 to 5, the present invention provides an integrated molding process of the water hose 100 as described above, which includes steps S1 to S4:
-S1: providing a water hose forming implementation device, wherein the water hose forming implementation device comprises a first circular weaving machine, a second circular weaving machine, a vulcanizing oven, a PLC (programmable logic controller) and a winding machine; the first circular weaving machine and the second circular weaving machine are arranged in the same vertical direction, the first circular weaving machine is positioned right above the second circular weaving machine, holes for the first fabric layer, the second fabric layer and the inner liner to pass through are formed in the middle of the first circular weaving machine and the second circular weaving machine, the circle centers of the upper holes of the first circular weaving machine and the second circular weaving machine are on the same vertical line, a vulcanizing oven and a winding machine are arranged at the outlet of the second circular weaving machine, the PLC is electrically connected with the first circular weaving machine, the second circular weaving machine and the winding machine, and the PLC controls the rotation frequency of motors on the first circular weaving machine, the second circular weaving machine and the winding machine so as to realize the integrated forming of the water hose;
-S2: starting the first circular weaving machine to form the second fabric layer, embedding the lining layer into the second fabric layer to obtain a first water hose semi-finished product, and vertically and downwards drawing the first water hose semi-finished product;
-S3: starting the second circular weaving machine to form the first fabric layer, enabling the first water hose semi-finished product to enter a hole of the second circular weaving machine from the hole of the first circular weaving machine, and embedding the first water hose semi-finished product into the first fabric layer and simultaneously drawing the first water hose semi-finished product and the inner liner layer to obtain a second water hose semi-finished product;
-S4: and filling air into the inner lining layer pipe, vulcanizing the second water band semi-finished product by using the vulcanizing oven, and winding by using a winding machine to obtain the water band.
As shown in fig. 3, in step S1, the water hose 100 may be produced and prepared by a water hose 100 forming implementation device, the implementation device may include a first circular weaving machine 1 and a second circular weaving machine 2 which are arranged in the same vertical direction, the first circular weaving machine 1 may be located right above the second circular weaving machine 2, holes (13, 23) through which the water hose 100 passes may be provided on each of the first circular weaving machine 1 and the second circular weaving machine 2, a diameter of the hole 13 on the first circular weaving machine 1 may be smaller than a diameter of the hole 23 on the second circular weaving machine 2, in some embodiments, the diameter of the hole 13 on the first circular weaving machine 1 may be 100 to 450mm, the diameter of the hole 23 on the second circular weaving machine 2 may be about 2 to 4mm larger than the diameter of the hole 13 on the first circular weaving machine 1, the holes (13, 23) may be concentrically arranged, in some embodiments, the vertical distance h between the first circular weaving machine 1 and the second circular weaving machine 2 may be 1.6-1.8 m, such as 1.7m, 1.75m, etc.
According to the invention, the hole 23 of the second circular weaving machine 2 is 2-4 mm larger than the hole 13 of the first circular weaving machine 1, so that the first fabric layer 101 and the second fabric layer 102 are tightly matched, namely the second fabric layer 102 expands after bearing pressure, and the first fabric layer 101 can bear partial pressure and can also counteract partial torsion force. If not within the above range, if greater than 4mm, the first fabric layer 101 will not bear pressure, and the manufacturing cost will increase, and if less than 2mm, the second fabric layer 102 will be easily folded, and the inner liner layer 103 will be damaged and leak water, so that the first fabric layer 101 will bear the working pressure, and the manufacturing cost will be high. The vertical distance h between the first circular weaving machine 1 and the second circular weaving machine 2 can be influenced by the elongation rate, the breaking strength and the like of raw materials, the tension of the water hose can be released after the water hose is placed in the range of 1.6-1.8 m, visual management of the product weaving quality is facilitated, when the distance h is smaller than 1.6m, the weaving quality cannot be effectively monitored, and if the distance h is larger than 1.8m, the problems of unstable inner diameter and weft density of the water hose can be caused.
As shown in fig. 3 and 4, the first circular weaving machine 1 may include a first shuttle, the second circular weaving machine 2 may include a second shuttle, the rotation speeds of the first shuttle and the second shuttle may be controlled by motors (11, 21) on the first circular weaving machine 1 and the second circular weaving machine 2, the rotation speeds of the shuttles may control the forming speeds of the first fabric layer 101 and the second fabric layer 102, so as to timely draw the formed fabric, ensure that the degree of fitting of the double-layer fabric meets the process requirements, and the fire hose 100 generally requires a uniform thickness, a uniform elongation, a smooth inner wall, and no wrinkles, and in some embodiments, the degree of fitting deviation between the first fabric layer 101 and the second fabric layer 102 cannot exceed ± 1 mm.
As shown in fig. 4 and 5, the device further includes a vulcanizing oven 5 and a winding machine 6, the vulcanizing oven 5 may be located behind the second water band semi-finished product 22 obtained at the outlet of the second circular weaving machine 2, and the winding machine 6 may be used to wind the vulcanized water band 100.
The device further comprises a PLC controller (not shown in fig. 4), the PLC controller may be electrically connected to the first circular weaving machine 1, the second circular weaving machine 2 and the winding machine 6, and the PLC controller may control the rotation frequency of the motors (11, 21) on the first circular weaving machine 1 and the second circular weaving machine 2 and the rotation frequency of the motor on the winding machine 6 to control the winding speed, respectively, so as to achieve that the matching degree of the double-layer water hose 100 meets the process requirement at a certain weft density.
In step S2, the first circular loom 1 is started, the yarns needed for weaving the second fabric layer 102 enter the first circular loom 1 from the creel, and the warp and weft yarns are interwoven to form the second fabric layer 102, the forming speed of the second fabric layer 102 can be controlled by the rotating frequency of the motor 11 on the first circular weaving machine 1, the rotating frequency of the motor 11 on the first circular weaving machine 1 can be 15-30 Hz, under the condition that the yarn fineness and the inner diameter of the second fabric layer 102 are kept constant, the rotating frequency of the motor 11 on the first circular weaving machine 1 can be in direct proportion to the weft density of the second fabric layer 102, and similarly, the rotating frequency of the motor 21 on the second circular weaving machine 2 can also have the same change characteristics, after the second fabric layer 102 is formed, the lining layer 103 may be embedded into the circular tube of the second fabric layer 102 to form the first water band semi-finished product 12, and the first water band semi-finished product 12 is pulled together.
In step S3, the second circular knitting machine 2 is started to form the first fabric layer 101, the first semi-finished hose 12 vertically enters the hole 23 of the second circular knitting machine 2 along with the pulling roll on the first circular knitting machine 1, the forming speed of the first fabric layer 101 can also be controlled by the rotation frequency of the motor 21 on the second circular knitting machine 2, the first semi-finished hose 12 is embedded in the first fabric layer 101 to form the second semi-finished hose 22, and the pulling roll on the second circular knitting machine 2 is used for synchronously pulling the second semi-finished hose 22 to be sent to a subsequent vulcanization process. In some embodiments, the rotation frequency of the motor 11 on the first circular knitting machine 1 may be greater than the rotation frequency of the motor 21 on the second circular knitting machine 2, and the rotation frequency of the motor on the second circular knitting machine 2 may be 10 to 20 Hz.
As shown in fig. 3, in step S4, in some embodiments, the rotation frequency of the motor on the winding machine 6 may be greater than the rotation frequency of the motor 11 on the first circular knitting machine 1, for example, the rotation frequency of the motor on the winding machine 6 may be 40 to 50 Hz. Under the condition that the inner diameter and the yarn fineness of the second fabric layer 102 are kept unchanged, the rotating frequency of the motor on the winding machine 6 can be kept constant along with the increase of the weft density of the second fabric layer 102, and the rotating frequency of the motor on the winding machine 6 is kept constant, so that the stability of the product quality can be improved, and the stability of the motor 12 on the first circular weaving machine 1 and the stability of the motor 21 on the second circular weaving machine 2 can also be kept.
The vulcanization can be realized by the vulcanization oven 5, the vulcanization oven 5 can be a rectangular oven, the length of the vulcanization oven 5 can be 20-30 m, the height of the vulcanization oven 5 can be 5-10 m, the width of the vulcanization oven 5 can be 5-10 m, the temperature in the vulcanization oven 5 can be 120-130 ℃, air with a certain pressure can be introduced into the inside of the inner liner 103 tube of the second water belt semi-finished product 22 for vulcanization, the vulcanization can enable the inner liner 103, the first fabric layer 101 and the first fabric layer 102 to be thermally bonded together, and the air pressure in the inside of the inner liner 103 tube can be 0.11-0.13 MPa, for example, 0.12 MPa. In some embodiments, the vulcanizing oven 5 may further be provided with a cooling device, the cooling medium may be normal temperature air blown into the vulcanizing oven 5 through a fan 51, the cooling device may allow cold air to enter the vulcanizing oven 5 from an air inlet 52 through an air pipe 54 via the fan 51 and then to be discharged from the vulcanizing oven 5 through an air outlet 53, the cooling device may prevent the temperature in the vulcanizing oven 5 from being too high, and the vulcanizing speed of the water hose 100 in the vulcanizing oven 5 is 3-6 m/min.
Evaluation of
The invention evaluates that the fineness of the yarns of the first fabric layer and the second fabric layer is 33000D, and the matching degree of the water band of the second fabric layer under different weft densities is tested under the condition that the inner diameter of the second fabric layer is not changed, samples are all produced by adopting the realizing device of the invention, and the rotating frequency implementation data and the matching degree results of the motors on the first circular weaving machine, the second circular weaving machine and the winding machine are shown in table 1.
TABLE 1 Performance evaluation Table for different motor rotation speeds
Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value. The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. An integrated forming process of a water hose, wherein the water hose is provided with a first fabric layer, a second fabric layer and an inner liner layer from outside to inside, and is characterized by comprising the following steps:
providing a water hose forming implementation device, wherein the water hose forming implementation device comprises a first circular weaving machine, a second circular weaving machine, a vulcanizing oven, a PLC (programmable logic controller) and a winding machine; the first circular weaving machine and the second circular weaving machine are arranged in the same vertical direction, the first circular weaving machine is positioned right above the second circular weaving machine, holes for the first fabric layer, the second fabric layer and the inner liner to pass through are formed in the middle of the first circular weaving machine and the second circular weaving machine, the circle centers of the upper holes of the first circular weaving machine and the second circular weaving machine are on the same vertical line, a vulcanizing oven and a winding machine are arranged at the outlet of the second circular weaving machine, the PLC is electrically connected with the first circular weaving machine, the second circular weaving machine and the winding machine, and the PLC controls the rotation frequency of motors on the first circular weaving machine, the second circular weaving machine and the winding machine so as to realize the integrated forming of the water hose;
starting the first circular weaving machine to form the second fabric layer, embedding the lining layer into the second fabric layer to obtain a first water hose semi-finished product, and vertically and downwards drawing the first water hose semi-finished product;
starting the second circular weaving machine to form the first fabric layer, enabling the first water hose semi-finished product to enter a hole of the second circular weaving machine from the hole of the first circular weaving machine, and embedding the first water hose semi-finished product into the first fabric layer and simultaneously drawing the first water hose semi-finished product and the inner liner layer to obtain a second water hose semi-finished product; and
and filling air into the inner lining layer pipe, vulcanizing the second water band semi-finished product by using the vulcanizing oven, and winding by using a winding machine to obtain the water band.
2. The integrated molding process according to claim 1, wherein: the vertical distance between the first circular weaving machine and the second circular weaving machine is 1.6-1.8 m.
3. The integrated molding process according to claim 1, wherein: the difference between the diameter of the hole in the second circular weaving machine and the diameter of the hole in the first circular weaving machine is 2-4 mm.
4. The integrated molding process according to claim 1, wherein: the weft density of the second fabric layer is 20-40, and the yarn fineness of the second fabric layer is 30000-40000D.
5. The integrated molding process according to claim 4, wherein: and when the inner diameter and the yarn fineness of the second fabric layer are kept constant, the rotating frequency of a motor on the winding machine is kept constant and is greater than that of a motor on the first circular weaving machine along with the increase of the weft density of the second fabric layer.
6. The integrated molding process according to claim 1, wherein: the length of the vulcanizing oven is 20-30 m, and the vulcanizing speed of the second water belt semi-finished product in the vulcanizing oven is 3-6 m/min.
7. The integrated molding process according to claim 1, wherein: the vulcanization temperature in the vulcanization oven is 120-130 ℃, and the pressure of air in the inner liner pipe is 0.11-0.13 MPa.
8. The integrated molding process according to claim 1, wherein: and a shutdown cop-changing identification supplement equivalent is arranged in the PLC.
9. The water hose prepared by the integral forming process according to any one of claims 1 to 8.
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| CN202110985264.7A CN113846403B (en) | 2021-08-26 | 2021-08-26 | Water hose and integrated forming process thereof |
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| CN202110985264.7A CN113846403B (en) | 2021-08-26 | 2021-08-26 | Water hose and integrated forming process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1157348A (en) * | 1996-10-31 | 1997-08-20 | 何俊秀 | Method for manufacturing inner composite polypropylene cylinder |
| WO2008043257A1 (en) * | 2006-10-08 | 2008-04-17 | Meichang Huang | A plastic circular loom which gets twice the result by once weaving |
| CN103206581A (en) * | 2013-04-27 | 2013-07-17 | 宝应县伟业管带厂 | Ultrahigh-pressure fire-fighting hose |
| CN106003770A (en) * | 2016-06-29 | 2016-10-12 | 中裕软管科技有限公司 | Novel myriameter rubber water hose production process |
| KR20170061111A (en) * | 2017-03-09 | 2017-06-02 | (주)대원실업사 | Gunny Sack, Apparatus and Method for Manufacturing Gunny Sack |
| CN208417833U (en) * | 2018-05-04 | 2019-01-22 | 公安部上海消防研究所 | The disposable double-deck split type fire hose of braiding |
-
2021
- 2021-08-26 CN CN202110985264.7A patent/CN113846403B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1157348A (en) * | 1996-10-31 | 1997-08-20 | 何俊秀 | Method for manufacturing inner composite polypropylene cylinder |
| WO2008043257A1 (en) * | 2006-10-08 | 2008-04-17 | Meichang Huang | A plastic circular loom which gets twice the result by once weaving |
| CN103206581A (en) * | 2013-04-27 | 2013-07-17 | 宝应县伟业管带厂 | Ultrahigh-pressure fire-fighting hose |
| CN106003770A (en) * | 2016-06-29 | 2016-10-12 | 中裕软管科技有限公司 | Novel myriameter rubber water hose production process |
| KR20170061111A (en) * | 2017-03-09 | 2017-06-02 | (주)대원실업사 | Gunny Sack, Apparatus and Method for Manufacturing Gunny Sack |
| CN208417833U (en) * | 2018-05-04 | 2019-01-22 | 公安部上海消防研究所 | The disposable double-deck split type fire hose of braiding |
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| CN113846403B (en) | 2022-11-11 |
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