CN210340534U - Intelligent water circulation and energy-saving life support system - Google Patents
Intelligent water circulation and energy-saving life support system Download PDFInfo
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- CN210340534U CN210340534U CN201920587240.4U CN201920587240U CN210340534U CN 210340534 U CN210340534 U CN 210340534U CN 201920587240 U CN201920587240 U CN 201920587240U CN 210340534 U CN210340534 U CN 210340534U
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Abstract
The utility model discloses an intelligence hydrologic cycle and energy-conserving life support system, the system includes: the water treatment subsystem comprises a sewage collection box, a primary filter, a primary sewage treatment box, a secondary filter and a secondary sewage treatment box, wherein the sewage collection box is used for collecting domestic wastewater, and the primary filter is used for receiving water output by the sewage collection box and performing coarse filtration; the primary sewage treatment box is used for collecting the water output after the water is roughly filtered by the primary filter, and purifying the collected water to obtain water meeting preset conditions, wherein the preset conditions at least comprise that the oil content in the water is lower than the preset oil content, the pH value of the water is within the preset pH value range, and the chlorine content in the water is lower than the preset chlorine content; the secondary filter is used for receiving water meeting preset conditions and performing fine filtration, and the secondary sewage treatment tank is used for clarifying the water output after the water is subjected to fine filtration by the secondary filter so as to obtain first-purity water. Utilize the utility model discloses, can promote the utilization ratio of cement pipe house water.
Description
Technical Field
The utility model relates to an environmental protection and energy saving technical field especially relates to an intelligence hydrologic cycle and energy-conserving life support system.
Background
Cement houses have been proposed as a new housing structure, either in the face of housing pressure or to increase the personal outdoor experience. The cement pipe house usually has a water circulation system which is relatively independent, however, the water circulation system of the existing cement pipe house has low water utilization degree, a large amount of available water is discharged immediately after being utilized once, the available water is not fully utilized, the waste of water resources is caused, and the environmental protection requirement is not met.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the more serious problem of current cement pipe house water waste, provide an intelligence hydrologic cycle and energy-conserving life support system.
The utility model discloses technical scheme as to above-mentioned technical problem and propose as follows:
the utility model provides an intelligence hydrologic cycle and energy-conserving life support system, a serial communication port, the system includes:
a water treatment subsystem, which comprises a sewage collecting tank, a primary filter, a primary sewage treatment tank, a secondary filter and a secondary sewage treatment tank, wherein,
the sewage collecting box is used for collecting domestic wastewater, and the primary filter is used for receiving water output by the sewage collecting box and performing coarse filtration;
the primary sewage treatment tank is used for collecting the water output after the water is coarsely filtered by the primary filter and purifying the collected water to obtain water meeting preset conditions, and the preset conditions at least comprise that the oil content in the water is lower than the preset oil content, the pH value of the water is within a preset pH value range, and the chlorine content in the water is lower than the preset chlorine content;
the secondary filter is used for receiving the water meeting the preset conditions and performing fine filtration, and the secondary sewage treatment tank is used for clarifying the water output after the fine filtration of the secondary filter so as to obtain water with first purity.
According to the intelligent water circulation and energy-saving life support system, the preset conditions further comprise that the foam amount in the water is lower than the preset foam amount, and the content of the particulate matters in the water is lower than the preset particulate matter content.
According to the above-mentioned intelligent hydrologic cycle and energy-conserving life support system, be provided with the acid-base adjusting device who is used for adjusting the pH value of water in the primary sewage treatment tank, acid-base adjusting device includes:
a pH value sensor arranged in the primary sewage treatment tank in an immersed mode;
the detector is electrically connected with the pH value sensor;
the charging controller is electrically connected with the detector; and
the feeder is electrically connected with the feeding controller and is used for adding acid-base adjusting materials to the primary sewage treatment tank so as to adjust the pH value of water in the primary sewage treatment tank;
the feeding controller is used for receiving and analyzing the data output by the detector, and outputting a control signal for controlling the feeding device to feed when the pH value of the analyzed water is not within a preset pH value range.
According to foretell intelligence hydrologic cycle and energy-conserving life support system, the charging means includes:
the discharge port is arranged on a charging pipe in the primary sewage treatment tank;
the feeding port of the feeding pipe is butted with the discharging end of the screw piston type feeding barrel;
and the motor is electrically connected with the feeding controller and is used for driving a screw of the screw piston type feeding cylinder so as to enable a piston in the screw piston type feeding cylinder to push acid and alkali to adjust the material to be discharged to the feeding pipe.
According to the intelligent water circulation and energy-saving life support system, an ultraviolet irradiation device is further arranged between the primary filter and the primary sewage treatment tank and is used for irradiating flowing water with ultraviolet light to realize sterilization treatment.
According to the above intelligent water circulation and energy saving life support system, the system further comprises a water collection subsystem, wherein the water collection system comprises:
a tap water collecting box for receiving tap water supply, a rainwater collecting box for collecting rainwater and a circulating water tank for collecting the first purity after being treated by the secondary sewage treatment tank, wherein a filtering and deodorizing treatment tank for performing adsorption treatment on water is also arranged between the secondary sewage treatment tank and the circulating water tank;
the circulating water tank is also communicated with the rainwater collecting box and the tap water collecting box, a first filter and a second filter are sequentially arranged on a communicating pipeline of the rainwater collecting box and the circulating water tank, and the circulating water tank is used for receiving water filtered by the second filter.
According to the above-mentioned intelligent hydrologic cycle and energy-conserving life support system, the system still includes the water using system, includes:
the direct drinking water tank is communicated with the tap water collecting tank, the water tank of the water heater is communicated with the circulating water tank, and the toilet water tank is communicated with the primary sewage treatment tank.
According to the intelligent water circulation and energy-saving life support system, the filtering and deodorizing treatment box is an active carbon filtering water tank.
According to foretell intelligence hydrologic cycle and energy-conserving life support system, the water system still includes cold water outlet pipe way, hot water outlet pipe way, cold water booster pump and hot water booster pump, cold water outlet pipe way with circulating water tank water intercommunication, the cold water booster pump sets up cold water outlet pipe way with on the intercommunication pipeline between the circulating water tank, hot water outlet pipe way with the water tank water intercommunication of water heater, the hot water booster pump sets up hot water outlet pipe way with on the intercommunication pipeline between the water tank of water heater.
According to the intelligent water circulation and energy-saving life support system, a first controllable water pump is arranged between the primary filter and the primary sewage treatment tank, a second controllable water pump is arranged between the primary sewage treatment tank and the secondary filter, the first controllable water pump is used for conveying water from the first controllable water pump to the primary sewage treatment tank, and the second controllable water pump is used for conveying water from the second controllable water pump to the secondary filter.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is:
the two-stage filter can reduce the content of particulate matters in water, and the two-stage sewage treatment tank is used for treating water, so that harmful gases such as chlorine in water can be removed to a greater extent, meanwhile, the viscosity of the water to environments such as pipelines and skins can be controlled in a mode of reducing the oil content in the water, and the usability of the water can be improved by controlling the pH value of the water within a preset pH value range, so that the recycling of the water is realized, the utilization rate of the water is improved, the environmental protection is facilitated, and meanwhile, the water cost of a user can be relatively reduced. In addition, because the filter and the sewage treatment box which are utilized have stronger easy disassembly and relatively simple structures, the device can better adapt to the environment where the cement pipe house is arranged and the removability of the cement pipe house.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic block diagram of an embodiment of an intelligent water circulation and energy-saving life support system according to the present invention;
fig. 2 is a schematic block diagram of the system of the intelligent water circulation and energy-saving life support system according to another embodiment of the present invention;
fig. 3 is a schematic structural view of the acid-base adjusting device of the intelligent water circulation and energy-saving life support system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, it is a system schematic block diagram of an intelligent water circulation and energy-saving life support system according to an embodiment of the present invention. The utility model provides an intelligence hydrologic cycle and energy-conserving life support system mainly is applied to cement pipe house, of course, also can be applied to under other similar or the same environment or the situation.
As shown in fig. 1, the intelligent water circulation and energy saving life support system 100 may include a water treatment subsystem 101, and the water treatment subsystem 101 may include a wastewater collection tank 102, a primary filter 103, a primary wastewater treatment tank 104, a secondary filter 105, and a secondary wastewater treatment tank 105.
The sewage collecting tank 102 is used for collecting domestic wastewater, and the primary filter 103 is used for receiving water output by the sewage collecting tank 102 and performing coarse filtration. Here, the domestic wastewater may include bath water, wash water, kitchen water, etc., and the water may be coarsely filtered by the primary filter 103 to reduce large solid particles in the water to a large extent.
The primary sewage treatment tank 104 is used for collecting the water output after the coarse filtration of the primary filter 103, and purifying the collected water to obtain water meeting preset conditions, wherein the preset conditions at least comprise that the oil content in the water is lower than the preset oil content, the pH value of the water is within the preset pH value range, and the chlorine content in the water is lower than the preset chlorine content. Here, the preset oil content, the preset pH range and the preset chlorine content can be adjusted accordingly according to the requirements of the user on the water quality. Further, the preset conditions may further include that the amount of foam in the water is less than a preset amount of foam, and the content of particulate matter in the water is less than a preset content of particulate matter. It should be understood that the water treated in the primary wastewater treatment tank 104 is a second level of purity, which may be used by a user, for example, to flush toilets, flush the exterior of automobiles, etc.
In practical application, when the oil content in water is controlled, the oil can be removed by adding a chemical oil removal agent or by physical oil-water separation or adsorption; when the pH value of the water is controlled, the pH value of the water can be adjusted by adding an acidic material or an alkaline material into the water; when the chlorine content in the water is controlled, the chlorine content can be controlled by means of electro-adsorption, salt deposition and the like; when the amount of foam in water is controlled, the foam can be controlled by an adsorbent and the like. When the content of the particulate matters in the water is controlled, the control can be realized by filtering and/or adsorbing by using an adsorbing material, and when the corresponding function is to be realized, the control can be realized by using a corresponding device and/or equipment.
The secondary filter 105 is used for receiving water meeting the preset conditions and performing fine filtration, and the secondary sewage treatment tank 106 is used for performing clarification treatment on the water output after the fine filtration by the secondary filter 105 to obtain first purity water. Here, most of the particles in the water are removed by the fine filtering action of the secondary filter 105, and the first purity water obtained by the clarification action of the secondary sewage treatment tank 106 satisfies certain water requirements, such as water for scrubbing articles, water for cleaning rooms, and the like, and, of course, can be used as cleaning water for cleaning the primary sewage treatment tank 104.
The utility model provides an intelligence hydrologic cycle and energy-conserving life support system is owing to utilize the two-stage filter, can reduce the particulate matter content of aquatic, and handle water owing to utilize two-stage sewage treatment case, therefore can get rid of the harmful gas of aquatic like chlorine to a great extent, the accessible reduces the mode control water of the oil content in aquatic simultaneously and gives like the pipeline, the viscosity that environment such as skin brought, go back accessible with the pH value control of water in predetermineeing the pH value within range in order to increase watered usability, realize the cyclic utilization of water from this, improve the utilization ratio to water, do benefit to environmental protection, still can reduce user's water cost relatively simultaneously. In addition, because the filter and the sewage treatment box which are utilized have stronger easy disassembly and relatively simple structures, the device can better adapt to the environment where the cement pipe house is arranged and the removability of the cement pipe house.
Referring to fig. 2, it is a system schematic block diagram of the intelligent water circulation and energy saving life support system provided by the present invention in another embodiment. It is to be understood that this embodiment may be implemented as a method, a device and/or an apparatus added to the foregoing embodiment to achieve the same or more functions or achieve the same or better effects, and is described in more detail with reference to the following embodiment.
As shown in fig. 2, the intelligent water circulation and energy saving life support system 200 may include a water collection subsystem, which may include a rainwater collection tank 201 for collecting rainwater, a tap water collection tank 204 for receiving tap water supply, and a circulation water tank 206, wherein the rainwater collected by the rainwater collection tank 201 may be filtered by the secondary filtering action of the first filter 202 and the second filter 203 to introduce the filtered water into the tap water collection tank 204, and of course, a disinfection device (such as an ultraviolet lamp) may be disposed between the first filter 202 and the second filter 203 to sterilize and disinfect the water; the rainwater collected by the rainwater collection box 201 can also be directly used for cleaning some sewage outlets.
The intelligent water circulation and energy saving life support system 200 of this embodiment may further comprise a water usage subsystem, which may comprise a direct drinking water tank (not shown) for receiving water output from the tap water collection tank 204, a water heater 207 for receiving the circulating water tank 206, and a toilet water tank 219 for receiving water output from the primary sewage treatment tank 213, the direct drinking water tank being in water communication with the tap water collection tank 204, the water tank of the water heater 207 being in water communication with the circulating water tank 206, and the toilet water tank 219 being in water communication with the primary sewage treatment tank 213.
The water in the tap water collecting tank 204 can be directly drunk by the user after being purified by a purifier 205, and meanwhile, the tap water collecting tank 204 can provide compensation water for the circulating water tank 206, so that the circulating water tank 206 can provide sufficient domestic water for the user, and certainly, the rainwater filtered by the second filter 203 can also provide water for the circulating water tank 206. The circulation tank 206 can supply water to a water heater 207, and when the water heater 207 is a solar water heater, the tank of the water heater 207 also supplies water to the pipes of the solar panel 208. The water heated by the water heater 207 can provide hot water for the hot water outlet pipe through the function of the booster pump 209, and the water in the circulating water tank 206 can provide normal temperature water for the cold water outlet pipe through the function of the booster pump 209. Here, the booster pump 209 may include a pump for pressurizing a cold water and a hot water, the cold water outlet pipe being in water communication with the circulation water tank 206, the cold water booster pump being provided on a communication pipe between the cold water outlet pipe and the circulation water tank 206, the hot water outlet pipe being in water communication with the tank of the water heater 207, and the hot water booster pump being provided on a communication pipe between the hot water outlet pipe and the tank of the water heater 207.
Here, the water discharged through the hot water outlet pipe and the cold water outlet pipe may be used for bathing and/or washing the face of the user, and may be used as other wash water, kitchen water, and the like. The sewage after use by the user (i.e. domestic wastewater) can be collected by the sewage collection tank 210, the domestic wastewater collected by the sewage collection tank 210 can be output to the primary filter 211, the primary filter 211 performs coarse filtration on the water flowing through, and then the water is conveyed from the first controllable water pump 212 to the primary sewage treatment tank 213 under the action of the first controllable water pump 212.
The primary sewage treatment tank 213 can perform oil separation treatment, particle removal treatment, foam removal treatment, chlorine removal treatment and pH value adjustment treatment on water flowing through, wherein an oil absorption net or an activated carbon rod can be arranged in the primary sewage treatment tank 213 to realize oil treatment, so that the oil content in the water is reduced; alum may be added to the primary sewage treatment tank 213 to remove particulate matter from the water to some extent, thereby reducing the particulate matter concentration; the amount of foam can be reduced by injecting a defoaming agent into the primary sewage treatment tank 213; the pH of the water may be adjusted by an acid-base adjusting device (not shown) to be within a preset pH range.
Refer to fig. 3, is the structure diagram of the acid-base adjusting device of the intelligent water circulation and energy-saving life support system of the present invention. As shown in fig. 3 and with reference to fig. 2, the acid-base adjusting device 2131 includes a pH sensor 2132, a detector 2133, a feeding controller 2134, and a feeder (not shown), where the pH sensor 2132 is immersed in the primary sewage treatment tank 213, the detector 2133 is electrically connected to the pH sensor, the feeding controller 2134 is electrically connected to the detector, the feeder is electrically connected to the feeding controller 2134, the feeding controller 2134 is configured to receive and analyze data output by the detector 2133, and output a control signal for controlling the feeder to feed when the pH value of the analyzed water is not within a preset pH range.
Here, the feeder includes a feeding tube 2135, a screw piston type feeding barrel 2136 and a motor 2137, a discharge port of the feeding tube 2135 is disposed in the primary sewage treatment tank 213, the screw piston type feeding barrel 2136 is connected to the feeding tube 2135, a feed port of the feeding tube 2135 is butted with a discharge end of the screw piston type feeding barrel 2136, the motor 2137 is electrically connected to the feeding controller 2134, and the motor 2137 is used for driving a screw of the screw piston type feeding barrel 2136, so that a piston in the screw piston type feeding barrel 2136 pushes the acid and alkali adjusting material to discharge to the feeding tube 2135, and the pH value of the water can be adjusted after the acid and alkali adjusting material discharged through the feeding tube 2135 is contacted with the water.
It is understood that the automatic addition of alum can be accomplished using a similar configuration to the acid/base adjustment device 2131 and will not be further described herein.
It will be appreciated that, in order to improve the efficiency of the above-described various processes, the water in the primary sewage treatment tank 213 may be also stirred to create turbulence.
The water treated by the primary sewage treatment tank 213 can be transferred from the second controllable water pump 214 to the secondary filter 216 by the second controllable water pump 214. Here, between the secondary filter 216 and the second controllable water pump 214, an ultraviolet irradiation device 215 may be further provided, and the ultraviolet irradiation device 215 may be used to perform ultraviolet irradiation on the water flowing through to perform the sterilization treatment. The secondary filter 216 finely filters the water passing through, and the filtered water is received by a secondary sewage treatment tank 217, which tank 217 clarifies the water to obtain a first purity level of water.
The first purified water may be treated by adsorption in the activated carbon filter water tank 218 to further improve the water purity, and the activated carbon filter water tank 218 may be replaced with other filtering deodorizing treatment tanks having the same function. Of course, in order to further improve the water purity, an ultraviolet lamp may be disposed between the activated carbon filtration water tank 218 and the secondary sewage treatment tank 217 for irradiation, so as to achieve a corresponding disinfection effect, and further improve the water purity.
In this embodiment, the water filtered by the activated carbon filter tank 218 may be supplied to the circulation tank 206, thereby realizing water recycling. The water treated by the secondary sewage treatment tank 217 may be used as clean water to clean a sewage drain, and the water treated by the primary sewage treatment tank 213 may be transferred to a toilet tank 219 for supplying toilet flushing water to a toilet 220, and excrement in the toilet 220 may be flushed into a septic tank 221. Can collect the dregs and the toilet 220 generated by the treatment of the primary sewage treatment tank 213, and the waste water generated by the treatment of the primary sewage treatment tank 213 can be directly discharged into the septic tank 221 for treatment, thereby realizing the corresponding environmental protection treatment.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. An intelligent water circulation and energy saving life support system, the system comprising:
a water treatment subsystem, which comprises a sewage collecting tank, a primary filter, a primary sewage treatment tank, a secondary filter and a secondary sewage treatment tank, wherein,
the sewage collecting box is used for collecting domestic wastewater, and the primary filter is used for receiving water output by the sewage collecting box and performing coarse filtration;
the primary sewage treatment tank is used for collecting the water output after the water is coarsely filtered by the primary filter and purifying the collected water to obtain water meeting preset conditions, and the preset conditions at least comprise that the oil content in the water is lower than the preset oil content, the pH value of the water is within a preset pH value range, and the chlorine content in the water is lower than the preset chlorine content;
the secondary filter is used for receiving the water meeting the preset conditions and performing fine filtration, and the secondary sewage treatment tank is used for clarifying the water output after the fine filtration of the secondary filter so as to obtain water with first purity.
2. The intelligent water circulation and energy-saving life support system according to claim 1, wherein the preset conditions further include that the amount of foam in the water is lower than a preset amount of foam, and the content of particulate matter in the water is lower than a preset content of particulate matter.
3. The intelligent water circulation and energy-saving life support system according to claim 2, wherein an acid-base adjusting device for adjusting the pH value of water is provided in the primary sewage treatment tank, the acid-base adjusting device comprising:
a pH value sensor arranged in the primary sewage treatment tank in an immersed mode;
the detector is electrically connected with the pH value sensor;
the charging controller is electrically connected with the detector; and
the feeder is electrically connected with the feeding controller and is used for adding acid-base adjusting materials to the primary sewage treatment tank so as to adjust the pH value of water in the primary sewage treatment tank;
the feeding controller is used for receiving and analyzing the data output by the detector, and outputting a control signal for controlling the feeding device to feed when the pH value of the analyzed water is not within a preset pH value range.
4. The intelligent water circulation and energy saving life support system of claim 3, wherein the charger comprises:
the discharge port is arranged on a charging pipe in the primary sewage treatment tank;
the feeding port of the feeding pipe is butted with the discharging end of the screw piston type feeding barrel;
and the motor is electrically connected with the feeding controller and is used for driving a screw of the screw piston type feeding cylinder so as to enable a piston in the screw piston type feeding cylinder to push acid and alkali to adjust the material to be discharged to the feeding pipe.
5. The intelligent water circulation and energy-saving life support system according to claim 2, wherein an ultraviolet irradiation device is further arranged between the primary filter and the primary sewage treatment tank, and the ultraviolet irradiation device is used for irradiating ultraviolet light on water flowing through to realize sterilization treatment.
6. The intelligent water circulation and energy saving life support system of claim 1 further comprising a water collection subsystem, wherein the water collection system comprises:
a tap water collecting box for receiving tap water supply, a rainwater collecting box for collecting rainwater and a circulating water tank for collecting the first purity after being treated by the secondary sewage treatment tank, wherein a filtering and deodorizing treatment tank for performing adsorption treatment on water is also arranged between the secondary sewage treatment tank and the circulating water tank;
the circulating water tank is also communicated with the rainwater collecting box and the tap water collecting box, a first filter and a second filter are sequentially arranged on a communicating pipeline of the rainwater collecting box and the circulating water tank, and the circulating water tank is used for receiving water filtered by the second filter.
7. The intelligent water circulation and energy saving life support system of claim 6, further comprising a water usage subsystem comprising:
the direct drinking water tank is communicated with the tap water collecting tank, the water tank of the water heater is communicated with the circulating water tank, and the toilet water tank is communicated with the primary sewage treatment tank.
8. The intelligent water circulation and energy saving life support system according to claim 7, wherein the filtering and odor removing treatment tank is an activated carbon filtering water tank.
9. The intelligent water circulation and energy-saving life support system according to claim 7, wherein the water utilization system further comprises a cold water outlet pipe, a hot water outlet pipe, a cold water booster pump and a hot water booster pump, the cold water outlet pipe is in water communication with the circulating water tank, the cold water booster pump is arranged on a communication pipe between the cold water outlet pipe and the circulating water tank, the hot water outlet pipe is in water communication with the water tank of the water heater, and the hot water booster pump is arranged on a communication pipe between the hot water outlet pipe and the water tank of the water heater.
10. The intelligent water circulation and energy saving life support system according to any one of claims 1 to 9, wherein a first controllable water pump is provided between the primary filter and the primary wastewater treatment tank, a second controllable water pump is provided between the primary wastewater treatment tank and the secondary filter, the first controllable water pump is used for conveying water from the first controllable water pump to the primary wastewater treatment tank, and the second controllable water pump is used for conveying water from the second controllable water pump to the secondary filter.
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| CN201920587240.4U CN210340534U (en) | 2019-04-26 | 2019-04-26 | Intelligent water circulation and energy-saving life support system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110078253A (en) * | 2019-04-26 | 2019-08-02 | 深圳滨海航空文化科技有限公司 | Intelligent water circulating and energy saving life support system |
| CN112030272A (en) * | 2020-09-09 | 2020-12-04 | 广州麦德仕科技有限公司 | Bale plucker is handled to cotton material for weaving |
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2019
- 2019-04-26 CN CN201920587240.4U patent/CN210340534U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110078253A (en) * | 2019-04-26 | 2019-08-02 | 深圳滨海航空文化科技有限公司 | Intelligent water circulating and energy saving life support system |
| CN112030272A (en) * | 2020-09-09 | 2020-12-04 | 广州麦德仕科技有限公司 | Bale plucker is handled to cotton material for weaving |
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