CN112110261B - Method and device for detecting preshrinking rate of preshrinking woven fabric - Google Patents
Method and device for detecting preshrinking rate of preshrinking woven fabric Download PDFInfo
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- CN112110261B CN112110261B CN202011170757.7A CN202011170757A CN112110261B CN 112110261 B CN112110261 B CN 112110261B CN 202011170757 A CN202011170757 A CN 202011170757A CN 112110261 B CN112110261 B CN 112110261B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H20/00—Advancing webs
- B65H20/30—Arrangements for accumulating surplus web
- B65H20/32—Arrangements for accumulating surplus web by making loops
- B65H20/34—Arrangements for accumulating surplus web by making loops with rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
- B65H23/1888—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling web tension
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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
- D06C17/00—Fulling
- D06C17/02—Fulling by rollers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/36—Textiles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/11—Dimensional aspect of article or web
- B65H2701/113—Size
- B65H2701/1133—Size of webs
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- Physics & Mathematics (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
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- Medicinal Chemistry (AREA)
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- Pathology (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The invention discloses a method and a device for detecting the pre-shrinking percentage of a pre-shrinking woven fabric, wherein the device for detecting the pre-shrinking percentage of the woven fabric comprises a first fabric tension adjusting mechanism arranged on the fabric inlet side of a rubber blanket shrinking unit, a second fabric tension adjusting mechanism arranged on the fabric outlet side of a woolen blanket drying unit and a central processing unit, the fabric inlet side of the rubber blanket shrinking unit is provided with a first length measuring mechanism for measuring the running length of the fabric, the fabric outlet side of the woolen blanket drying unit is provided with a second length measuring mechanism for measuring the running length of the fabric, and the first fabric tension adjusting mechanism, the second fabric tension adjusting mechanism, the first length measuring mechanism and the second length measuring mechanism are connected with the central processing unit. The invention is provided with the first fabric tension adjusting mechanism and the second fabric tension adjusting mechanism and adjusts and controls the first fabric tension adjusting mechanism and the second fabric tension adjusting mechanism, so that when the lengths of the fabric before and after the preshrinking finish are measured, the tension at the two length measuring positions is equal.
Description
Technical Field
The invention relates to a method and a device for detecting the preshrinking rate, in particular to a method and a device for detecting the preshrinking rate of a fabric running in a preshrinking machine, and belongs to the technical field of dyeing and finishing equipment and processes.
Background
The fabric is inevitably subjected to stretching by the machine during dyeing, printing and finishing, so that tension exists on the fabric, however, the fabric is easily released after encountering water, and therefore, people can find that the fabric is shrunk after washing. In the practical dyeing and finishing process, a pre-shrinking machine is generally adopted to shrink the size of the fabric under the conditions of humidity and heat, so that the potential shrinkage of the fabric existing originally is pre-shrunk before the finished product, so as to meet the shrinkage standard specified by the textile, and prevent the shrinkage of the textile when the textile is worn and washed after the textile is processed into clothing.
Preshrinking uses physical means to reduce shrinkage of the fabric after soaking to reduce the shrinkage finishing process, also known as mechanical preshrinking finishing. The preshrinking rate is the length percentage of the fabric before and after mechanical preshrinking finishing, the traditional detection method is that an operator marks the fabric at a fabric feeding position in the driving process, after finishing, the value after finishing the marked place at the moment is measured at a fabric discharging position by using a ruler, and the difference between the two is divided by the measured value when the fabric is fed. If the pre-shrinking percentage does not meet the process requirement, the pressure or the speed of the rubber blanket in the pre-shrinking machine is regulated generally by the experience of operators and then re-measurement is carried out, and because the fabric is influenced by subjective factors such as artificial pulling and measurement in the measurement process, the pre-shrinking percentage detection has larger errors, especially the measurement interval is long, so that unqualified products are increased, and in order to ensure the credit of enterprises and avoid goods return, the contract is adopted to require the upper limit goods delivery of the pre-shrinking percentage, so that energy consumption such as cloth steam is caused, and the production cost is increased.
The Chinese patent number ZL201610327581.9 discloses a cloth shrinkage detection device and a method, wherein the cloth shrinkage detection device comprises a first stitch detection device, a first length measurement device, a second stitch detection device and a control device. The control device is used for controlling the first length measuring device and the second length measuring device to detect the length and calculate the shrinkage of the current cloth when the second stitch detecting device detects the stitch between the current cloth and the last cloth. The detection device and the detection method have the following defects in the actual working process: because the length of the cloth is closely related to the tension of the fabric in the warp direction, the fabric is greatly tensioned, and the fabric can be additionally stretched, obviously, the fabric tension at the first length measuring device and the fabric tension at the second length measuring device in the device are different, and certain tension is given when the fabric enters between the rubber blanket rolling point and the front guide roller, namely, the fabric tension at the first length measuring device is far greater than the tension at the second length measuring device, and the length detection of the fabric (such as elastic fabric) in different tension states can greatly influence the calculation result of the pre-shrinkage rate, so that the accuracy of the pre-shrinkage rate obtained by detection is low and cannot be used for guiding and adjusting the pre-shrinkage process parameters.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing the method for detecting the preshrinking rate of the preshrinking woven fabric, which can accurately detect the preshrinking rate of the woven fabric on line and is easy and convenient to operate. Meanwhile, the invention also provides a device for detecting the pre-shrinking percentage of the pre-shrinking woven fabric, which can accurately detect the shrinking percentage of the woven fabric running in the pre-shrinking machine on line, can furthest reduce the influence of the tension of the woven fabric on the detection result on the detection mechanism, and has reasonable structure and high reliability.
In order to solve the technical problems, the invention adopts the method for detecting the preshrinking rate of the preshrinking woven fabric, wherein the preshrinking machine comprises a rubber blanket shrinking unit and a woolen blanket drying unit, and the method comprises the following steps: the fabric pre-shrinkage rate is obtained by respectively arranging a first fabric tension adjusting mechanism and a second fabric tension adjusting mechanism on the fabric inlet side of the rubber blanket shrinkage unit and the fabric outlet side of the woolen blanket drying unit, respectively adjusting the fabric tension of the fabric inlet side of the rubber blanket shrinkage unit and the fabric tension of the fabric outlet side of the woolen blanket drying unit through the first fabric tension adjusting mechanism and the second fabric tension adjusting mechanism, and comparing the fabric length of the fabric inlet side and the fabric length of the fabric outlet side in a period of time when the fabric tension of the fabric inlet side and the fabric tension of the fabric outlet side after adjustment are equal to or within a set tension allowable range.
As a preferred embodiment of the invention, the first fabric tension adjusting mechanism comprises a first fabric guide roller for adjusting the fabric tension of the fabric on the fabric feeding side of the rubber blanket shrink unit, the second fabric tension adjusting mechanism comprises a second fabric guide roller for adjusting the fabric tension of the fabric on the fabric discharging side of the blanket drying unit, and the fabric synchronously runs with the rubber blanket shrink unit through the first fabric tension adjusting mechanism and the fabric synchronously runs with the blanket drying unit through the second fabric tension adjusting mechanism by detecting the positions of the first fabric guide roller and the second fabric guide roller.
As a preferred embodiment of the invention, the fabric tension of the cloth feeding side after adjustment is equal to or less than 0 ℃ within the set tension allowable range and equal to or less than 10daN/cm, and the fabric tension of the cloth discharging side after adjustment is equal to or less than 0 ℃ within the set tension allowable range and equal to or less than 8daN/cm.
In order to solve the technical problems, the invention adopts the pre-shrinking machine fabric pre-shrinking rate detection device for detecting the pre-shrinking rate of fabric running by a pre-shrinking machine, the pre-shrinking machine comprises a rubber blanket shrinking unit and a blanket drying unit, the pre-shrinking machine fabric pre-shrinking rate detection device comprises a first fabric tension adjustment mechanism arranged on the fabric inlet side of the rubber blanket shrinking unit, a second fabric tension adjustment mechanism arranged on the fabric outlet side of the blanket drying unit and a central processing unit, the fabric inlet side of the rubber blanket shrinking unit is provided with a first length measurement mechanism for measuring the running length of the fabric, the fabric outlet side of the blanket drying unit is provided with a second length measurement mechanism for measuring the running length of the fabric, and the first fabric tension adjustment mechanism, the second fabric tension adjustment mechanism, the first length measurement mechanism and the second length measurement mechanism are connected with the central processing unit.
As a preferable implementation mode of the invention, a first fabric tension detecting mechanism for detecting fabric tension is further arranged on the fabric feeding side of the rubber blanket shrinkage unit, a second fabric tension detecting mechanism for detecting fabric tension is further arranged on the fabric discharging side of the blanket drying unit, and the first fabric tension detecting mechanism and the second fabric tension detecting mechanism are connected with the central processing unit.
As a preferred embodiment of the present invention, the first fabric tension detecting mechanism includes a third cloth guide roller disposed at a cloth feeding side of the rubber blanket shrink cloth unit, and a first force sensor is installed at least one end of the third cloth guide roller; the second fabric tension detection mechanism comprises a fourth cloth guide roller arranged on the cloth outlet side of the woolen blanket drying unit, a second force sensor is arranged at least one end of the fourth cloth guide roller, and the first force sensor and the second force sensor are connected with the central processing unit.
As a preferred embodiment of the present invention, the first fabric tension adjusting mechanism includes a first cloth guide roller, and a first cylinder and a second cylinder respectively disposed at two ends of the first cloth guide roller, where the first cylinder and the second cylinder are connected with a first air intake adjusting valve, and a cylinder shaft of the first cylinder and a cylinder shaft of the second cylinder are respectively connected with or offset against two ends of the first cloth guide roller; the second fabric tension adjusting mechanism comprises a second fabric guiding roller and a third air cylinder and a fourth air cylinder which are respectively arranged at two ends of the second fabric guiding roller, the third air cylinder and the fourth air cylinder are connected with a second air inlet adjusting valve, the air cylinder shaft of the third air cylinder and the air cylinder shaft of the fourth air cylinder are respectively connected with or offset against two ends of the second fabric guiding roller, and the first air inlet adjusting valve and the second air inlet adjusting valve are controlled by the central processing unit.
As a preferred embodiment of the present invention, the first fabric tension adjusting mechanism includes a first fabric guiding roller, and a first cylinder and a second cylinder respectively disposed at two ends of the first fabric guiding roller, the first cylinder and the second cylinder are connected with a first air inlet adjusting valve, the first fabric tension detecting mechanism includes a first force sensor, the first force sensor is disposed at least one end of the first fabric guiding roller, when the first force sensor is disposed at one end of the first fabric guiding roller where the first cylinder is disposed, the first force sensor is mounted on a cylinder shaft of the first cylinder, and the first force sensor is connected with or offset against one end of the first fabric guiding roller, and the cylinder shaft of the second cylinder is connected with or offset against the other end of the first fabric guiding roller; when the first force sensor is arranged at one end of the first cloth guide roller, which is provided with the second air cylinder, the first force sensor is arranged on the air cylinder shaft of the second air cylinder, the first force sensor is connected with or propped against one end of the first cloth guide roller, and the air cylinder shaft of the first air cylinder is connected with or propped against the other end of the first cloth guide roller; when the first force sensors are respectively arranged at the two ends of the first cloth guide roller, the first force sensors are respectively arranged on the cylinder shaft of the first cylinder and the cylinder shaft of the second cylinder, and the first force sensors are connected with or propped against the two ends of the first cloth guide roller; the second fabric tension adjusting mechanism comprises a second fabric guide roller, a third air cylinder and a fourth air cylinder which are respectively arranged at two ends of the second fabric guide roller, the third air cylinder and the fourth air cylinder are connected with a second air inlet adjusting valve, the second fabric tension detecting mechanism comprises a second force sensor, at least one end of the second fabric guide roller is provided with the second force sensor, when the second force sensor is arranged at one end of the second fabric guide roller, which is provided with the third air cylinder, the second force sensor is arranged on an air cylinder shaft of the third air cylinder, the second force sensor is connected with or props against one end of the second fabric guide roller, and the air cylinder shaft of the fourth air cylinder is connected with or props against the other end of the second fabric guide roller; when the second force sensor is arranged at one end of the second cloth guide roller, which is provided with a fourth air cylinder, the second force sensor is arranged on the air cylinder shaft of the fourth air cylinder, the second force sensor is connected with or propped against one end of the second cloth guide roller, and the air cylinder shaft of the third air cylinder is connected with or propped against the other end of the second cloth guide roller; when the second force sensors are respectively arranged at the two ends of the second cloth guide roller, the second force sensors are respectively arranged on the cylinder shaft of the third cylinder and the cylinder shaft of the fourth cylinder, and the second force sensors are connected with or propped against the two ends of the second cloth guide roller; the first force sensor, the second force sensor, the first air inlet regulating valve and the second air inlet regulating valve are connected with the central processing unit.
As a preferred embodiment of the present invention, the first fabric tension adjusting mechanism further includes a first position sensor and/or a second position sensor, and the first position sensor and the second position sensor are respectively connected with the cylinder shaft of the first cylinder and the cylinder shaft of the second cylinder; the second fabric tension adjusting mechanism further comprises a third position sensor and/or a fourth position sensor, the third position sensor and the fourth position sensor are respectively connected with the cylinder shaft of the third cylinder and the cylinder shaft of the fourth cylinder, and the first position sensor, the second position sensor, the third position sensor and the fourth position sensor are connected with the central processing unit.
As a preferred implementation mode of the invention, a first motor and a first traction roller driven by the first motor are arranged on the cloth feeding side of the first cloth guide roller, the first length measuring mechanism is positioned between the first traction roller and the rubber blanket shrinkage unit, a second motor and a second traction roller driven by the second motor are arranged on the cloth discharging side of the second cloth guide roller, the second length measuring mechanism is positioned between the second traction roller and the blanket drying unit, the first motor and the second motor are connected with the central processing unit, the first length measuring mechanism and the second length measuring mechanism are roller encoders, and the central processing unit is a digital controller with a man-machine interface or an embedded system or an industrial personal computer.
After the technical scheme is adopted, the invention has the following beneficial effects:
The pre-shrinking percentage is the length percentage of the fabric before and after pre-shrinking finishing, and because the tension of the fabric directly influences the length measurement value, the invention sets the first fabric tension adjusting mechanism and the second fabric tension adjusting mechanism and regulates and controls the first fabric tension adjusting mechanism and the second fabric tension adjusting mechanism, ensures that the tension at the two length measuring positions is equal or within the set tension allowable range when the fabric length before and after the pre-shrinking finishing is measured, and fully meets the tension requirements of fabrics with different properties, different pre-shrinking processes and different resin finishing on fabric shrinkage detection.
Before the fabric enters a rubber blanket shrinkage unit of a pre-shrinking machine and after the fabric leaves a woolen blanket drying unit, the tension of the fabric has great influence on the pre-shrinking of the fabric, and the excessive tension can lead the fabric to stretch in the warp direction, so that the pre-shrinking is not facilitated; the invention adopts an air cylinder, an air inlet regulating valve controlled by a central processing unit and a cloth guide roller according to different fabrics to regulate the tension of the fabrics before entering a rubber blanket shrinkage unit and after leaving a woolen blanket drying unit, so that the tension suitable for the fabric variety can be better generated, and the tension of the fabrics can be accurately regulated in real time. In addition, the invention can preset the fabric tension favorable for preshrinking according to the fabric variety and preshrinking process, and ensure constant tension. The online detection and control of the tension adjusting mechanism can well ensure the reproducibility of the technological process, the shrinkage rate of the fabric after preshrinking finishing can be controlled within a specified range, and the stability of the shrinkage rate of the finished product is improved.
According to the invention, the force sensor is arranged between the air cylinder and the end part of the cloth guide roller, the force sensor is arranged between the air cylinder shaft of the air cylinder and the end part of the cloth guide roller, the actual tension of the fabric is fed back to the central processing unit in real time through the force sensor, the central processing unit controls the air inlet regulating valve and the air cylinder shaft of the air cylinder to act in real time, the fabric tension is ensured to be equal to the set tension or within the set tension allowable range, the requirement of the preshrinking process on the fabric tension is further ensured, the stable external dimension is obtained, and the fabric meets certain weight and stiffness requirements.
According to the invention, the first fabric tension adjusting mechanism and the first fabric tension detecting mechanism are arranged on the fabric inlet side of the rubber blanket shrinkage unit, the second fabric tension adjusting mechanism and the second fabric tension detecting mechanism are arranged on the fabric outlet side of the blanket drying unit, when the cloth storage device works, fabric storage on the fabric inlet side can be formed between the first fabric tension adjusting mechanism and the first fabric tension detecting mechanism, fabric storage on the fabric outlet side can be formed between the second fabric tension adjusting mechanism and the second fabric tension detecting mechanism, a dynamic buffering effect is achieved, fabric accumulation or stretch-breaking on the fabric inlet side and the fabric outlet side can be effectively prevented, and the technical requirements of finishing are better met.
According to the invention, the position sensor is arranged to detect the positions of the first cloth guide roller and the second cloth guide roller in real time, so that the fabric synchronously runs with the rubber blanket shrinkage unit through the first fabric tension adjusting mechanism or the second fabric tension adjusting mechanism under the set tension or the set tension allowance range, the fabric synchronously runs with the woolen blanket drying unit through the second fabric tension adjusting mechanism, the phenomenon that the pre-shrinkage effect is counteracted due to accidental drafting of the fabric is prevented, and the pre-shrinkage quality is ensured.
The invention can accurately and online detect the pre-shrinking rate of the fabric running in the pre-shrinking machine, has reasonable and simple structure, convenient installation, simple and convenient operation and convenient maintenance, can eliminate the influence of the fabric tension on the detection result on the detection mechanism, and has high reliability.
Drawings
The following describes the embodiments of the present invention in further detail with reference to the drawings.
Fig. 1 is a schematic structural view of a device for detecting the preshrinking rate of a preshrinking woven fabric according to the present invention.
Fig. 2 is a schematic side view of a first fabric tension adjustment mechanism in accordance with the present invention.
Fig. 3 is a schematic front view of a first fabric tension adjusting mechanism according to the present invention.
Fig. 4 is a schematic side view of a second fabric tension adjustment mechanism in accordance with the present invention.
Fig. 5 is a schematic front view of a second fabric tension adjusting mechanism according to the present invention.
Fig. 6 is a schematic structural view of the first fabric tension detecting mechanism or the second fabric tension detecting mechanism according to the present invention.
Detailed Description
Referring to fig. 1 to 6, a method for detecting a pre-shrinkage rate of a pre-shrinking woven fabric, the pre-shrinking machine comprising a rubber blanket shrinkage unit a and a blanket drying unit B, the rubber blanket shrinkage unit a comprising a heated pressure-bearing roller A1 and a wet-feeding drying cylinder A2 driven by a motor, the blanket drying unit B comprising a blanket drying cylinder B1 driven by a motor, the method comprising the steps of: the fabric pre-shrinking rate is obtained by respectively arranging a first fabric tension adjusting mechanism 1 and a second fabric tension adjusting mechanism 2 on the fabric feeding side of the rubber blanket shrinkage unit A and the fabric discharging side of the woolen blanket drying unit B, respectively adjusting the fabric tension of the fabric feeding side of the rubber blanket shrinkage unit A and the fabric tension of the fabric discharging side of the woolen blanket drying unit B through the first fabric tension adjusting mechanism and the second fabric tension adjusting mechanism, and comparing the fabric length of the fabric feeding side and the fabric discharging side in a time period when the fabric tension of the fabric feeding side and the fabric discharging side after adjustment is equal to the set tension or is within the set tension allowable range. For example, if the length of the fabric on the fabric feeding side is L1 and the length of the fabric on the fabric discharging side is L2, which is measured in a certain period of time, the fabric shrinkage S, s= (L1-L2)/(l1×100%). In the present invention, the time periods may be the same time period starting at the same time, or may be equal time periods starting at different times. The set tension is typically a technically preset tension for different fabric types.
As a preferred embodiment of the invention, the first fabric tension adjusting mechanism comprises a first fabric guide roller 1-1 for adjusting the fabric tension of the fabric feeding side of the rubber blanket shrink cloth unit, the second fabric tension adjusting mechanism comprises a second fabric guide roller 2-1 for adjusting the fabric tension of the fabric discharging side of the blanket drying unit, and the fabric is preferably kept to run synchronously with the fabric on the heating pressure-bearing roller A1 or the moisture-feeding drying cylinder A2 of the electric control main control unit of the rubber blanket shrink cloth unit A when passing through the first fabric tension adjusting mechanism by detecting the positions of the first fabric guide roller and the second fabric guide roller, and the fabric is kept to run synchronously with the fabric on the blanket drying unit B, preferably the blanket drying cylinder B1, through the second fabric tension adjusting mechanism.
As a preferred embodiment of the invention, the fabric tension of the cloth feeding side after adjustment is equal to or less than 0 ℃ within the set tension allowable range and equal to or less than 10daN/cm, and the fabric tension of the cloth discharging side after adjustment is equal to or less than 0 ℃ within the set tension allowable range and equal to or less than 8daN/cm. Of course, the limit value may be other than 10daN/cm or 8daN/cm, and the value may be larger or smaller, for example, 3daN/cm, 5daN/cm, 15daN/cm, 20daN/cm, or the like.
Referring to fig. 1 to 6, a pre-shrinking machine fabric pre-shrinking rate detection device is used for detecting the pre-shrinking rate of a pre-shrinking machine running fabric, the pre-shrinking machine comprises a rubber blanket shrinking unit A and a blanket drying unit B, the rubber blanket shrinking unit A comprises a heating bearing roller A1 and a wet drying cylinder A2 which are driven by motors, the blanket drying unit B comprises a blanket drying cylinder B1 which is driven by motors, the pre-shrinking machine fabric pre-shrinking rate detection device comprises a first fabric tension adjustment mechanism 1 arranged on the fabric inlet side of the rubber blanket shrinking unit A, a second fabric tension adjustment mechanism 2 arranged on the fabric outlet side of the blanket drying unit B and a central processing unit, a first length measuring mechanism 3 used for measuring the running length of the fabric is arranged on the fabric outlet side of the rubber blanket shrinking unit A, and a second length measuring mechanism 4 used for measuring the running length of the fabric is arranged on the fabric outlet side of the blanket drying unit B, and the first fabric tension adjustment mechanism 1, the second fabric tension adjustment mechanism 2, the first length measuring mechanism 3 and the second length measuring mechanism 4 are connected with the central processing unit.
As a preferable implementation mode of the invention, a first fabric tension detecting mechanism for detecting fabric tension is further arranged on the fabric feeding side of the rubber blanket shrinkage unit A, a second fabric tension detecting mechanism for detecting fabric tension is further arranged on the fabric discharging side of the blanket drying unit B, and the first fabric tension detecting mechanism and the second fabric tension detecting mechanism are connected with the central processing unit.
As a preferred embodiment of the present invention, as shown in fig. 1 and 6, the first fabric tension detecting mechanism includes a third fabric guide roller 6 disposed at the fabric feeding side of the rubber blanket shrink unit a, and a first force sensor 7 is installed at least one end of the third fabric guide roller 6; the second fabric tension detection mechanism comprises a fourth cloth guide roller 8 arranged on the cloth outlet side of the woolen blanket drying unit B, a second force sensor 9 is arranged at least one end of the fourth cloth guide roller 8, the first force sensor 7 and the second force sensor 9 are arranged on the pre-compressor, and the first force sensor 7 and the second force sensor 9 are connected with the central processing unit. In fig. 1, the first force sensor 7 and the second force sensor 9 are not shown, only the third cloth guide roller 6 and the fourth cloth guide roller 8 are shown, fig. 6 only shows that the first force sensor 7 or the second force sensor 9 is installed at one end, for example, the left end, of the third cloth guide roller 6 or the fourth cloth guide roller 8, and in the specific installation, bearing seats 10 are preferably respectively arranged at two ends of the third cloth guide roller 6 and the fourth cloth guide roller 8, the upper ends of the first force sensor 7 or the second force sensor 9 are fixedly connected with the bearing seats 10, and the lower ends of the first force sensor 7 or the second force sensor 9 are fixedly connected with a frame 11 of the pre-compressor.
As a preferred embodiment of the present invention, referring to fig. 3, the first fabric tension adjusting mechanism 1 includes a first fabric guiding roller 1-1 and first and second air cylinders 1-2 and 1-3 respectively disposed at two ends of the first fabric guiding roller 1-1, the first and second air cylinders 1-2 and 1-3 are connected with a first air intake adjusting valve 1-4, in the present invention, the first air intake adjusting valve 1-4 is preferably a three-way air intake adjusting valve, the first and second air cylinders 1-2 and 1-3 are respectively connected with the three-way air intake adjusting valve through pipelines, the first air inlet regulating valve 1-4 may be two-way air inlet regulating valves, the first air cylinder 1-2 and the second air cylinder 1-3 are respectively connected with one two-way air inlet regulating valve, not shown in the figure, the air cylinder shaft of the first air cylinder 1-2 and the air cylinder shaft of the second air cylinder 1-3 are respectively connected with or offset against two ends of the first cloth guide roller 1-1, and in specific implementation, preferably, bearing seats 1-10 are respectively arranged at two ends of the first cloth guide roller 1-1, and the air cylinder shaft of the first air cylinder 1-2 and the air cylinder shaft of the second air cylinder 1-3 are preferably fixedly connected with or offset against the bearing seats 1-10 at two ends of the first cloth guide roller 1-1, not shown in the figure. Referring to fig. 5, the second fabric tension adjusting mechanism 2 includes a second fabric guiding roller 2-1 and a third air cylinder 2-2 and a fourth air cylinder 2-3 respectively disposed at two ends of the second fabric guiding roller 2-1, wherein the third air cylinder 2-2 and the fourth air cylinder 2-3 are connected with a second air inlet adjusting valve 2-4, in the present invention, the second air inlet adjusting valve 2-4 is preferably a three-way air inlet adjusting valve, the third air cylinder 2-2 and the fourth air cylinder 2-3 are respectively connected with the three-way air inlet adjusting valve through pipelines, of course, the second air inlet adjusting valve 2-4 may also be two-way air inlet adjusting valves, the third air cylinder 2-2 and the fourth air cylinder 2-3 are respectively connected with one two-way air inlet adjusting valve, the air cylinder shaft of the third air cylinder 2-2 and the air cylinder shaft of the fourth air cylinder 2-3 are respectively connected with or abutted against two ends of the second fabric guiding roller 2-1, preferably in the specific implementation, the third air cylinder 2-2 and the fourth air cylinder 2-3 are respectively disposed in the two ends of the second fabric guiding roller 2-1, the second air guiding roller 2-4 is preferably disposed in the two ends of the air guiding roller 2-1, respectively, and the air cylinder shafts of the third air cylinder 2-3 and the fourth air cylinder 2-3 are respectively connected with two air inlet adjusting valves respectively. In the present invention, the first cylinder 1-2, the second cylinder 1-3, the third cylinder 2-2 and the fourth cylinder 2-3 are preferably mounted on a frame 11 of the pre-compressor, but may be mounted on separate support frames.
As a preferred embodiment of the present invention, referring to fig. 3, the first fabric tension adjusting mechanism 1 includes a first fabric guiding roll 1-1 and first and second air cylinders 1-2 and 1-3 respectively disposed at two ends of the first fabric guiding roll 1-1, the first and second air cylinders 1-2 and 1-3 are connected with a first air intake adjusting valve 1-4, and the specific connection method is the same as the above embodiment, the first fabric tension detecting mechanism includes a first force sensor 1-5, the first force sensor 1-5 is disposed at least one end of the first fabric guiding roll 1-1, when the first force sensor 1-5 is disposed at one end of the first fabric guiding roll 1-1 where the first air cylinder 1-2 is disposed, The first force sensor 1-5 is arranged on the cylinder shaft of the first cylinder 1-2, the first force sensor 1-5 is connected with or props against one end of the first cloth guide roller 1-1, the cylinder shaft of the second cylinder 1-3 is connected with or props against the other end of the first cloth guide roller 1-1, in specific implementation, bearing seats 1-10 are preferably arranged at two ends of the first cloth guide roller 1-1 respectively, the lower end of the first force sensor 1-5 is preferably fixedly arranged on the cylinder shaft of the first cylinder 1-2, the upper end of the first force sensor 1-5 is preferably fixedly connected with or props against the bearing seat 1-10 at one end of the first cloth guide roller 1-1, and the cylinder shaft of the second cylinder 1-3 is preferably fixedly connected with or props against the bearing seat 1-10 at the other end of the first cloth guide roller 1-1. When the first force sensor 1-5 is arranged at one end of the first cloth guide roller 1-1 provided with the second air cylinder 1-3, the first force sensor 1-5 is arranged on the air cylinder shaft of the second air cylinder 1-3, the first force sensor 1-5 is connected with or props against one end of the first cloth guide roller 1-1, the air cylinder shaft of the first air cylinder 1-2 is connected with or props against the other end of the first cloth guide roller 1-1, and in specific implementation, the lower end of the first force sensor 1-5 is preferably fixedly arranged on the air cylinder shaft of the second air cylinder 1-3, and the upper end of the first force sensor 1-5 is preferably fixedly connected with or props against the bearing seat 1-10 at one end of the first cloth guide roller 1-1, and the air cylinder shaft of the first air cylinder 1-2 is fixedly connected with or props against the bearing seat 1-10 at the other end of the first cloth guide roller 1-1. When the first force sensors 1-5 are respectively arranged at the two ends of the first cloth guide roller 1-1, the first force sensors 1-5 are respectively arranged on the cylinder shafts of the first cylinder 1-2 and the second cylinder 1-3, the first force sensors 1-5 are connected with or propped against the two ends of the first cloth guide roller 1-1, and when in specific implementation, the first force sensors 1-5 are respectively fixedly arranged on the cylinder shafts of the first cylinder 1-2 and the second cylinder 1-3, and the upper ends of the first force sensors 1-5 are preferably fixedly connected with or propped against the bearing seats 1-10 at the two ends of the first cloth guide roller 1-1. Referring to fig. 5, the second fabric tension adjusting mechanism 2 includes a second fabric guiding roller 2-1 and a third cylinder 2-2 and a fourth cylinder 2-3 respectively disposed at two ends of the second fabric guiding roller 2-1, the third cylinder 2-2 and the fourth cylinder 2-3 are connected with a second air inlet adjusting valve 2-4, the specific connection method is the same as the previous embodiment, the second fabric tension detecting mechanism includes a second force sensor 2-5, at least one end of the second fabric guiding roller 2-1 is provided with the second force sensor 2-5, when the second force sensor 2-5 is disposed at one end of the second fabric guiding roller 2-1 where the third cylinder 2-2 is disposed, the second force sensor 2-5 is mounted on a cylinder shaft of the third cylinder 2-2 and the second force sensor 2-5 is connected with or offset against one end of the second fabric guiding roller 2-1, The cylinder shaft of the fourth cylinder 2-3 is connected with or props against the other end of the second cloth guide roller 2-1, in the concrete implementation, bearing seats 2-10 are preferably arranged at two ends of the second cloth guide roller 2-1 respectively, the lower end of the second force sensor 2-5 is preferably fixedly arranged on the cylinder shaft of the third cylinder 2-2, the upper end of the second force sensor 2-5 is preferably fixedly connected with or props against the bearing seat 2-10 at one end of the second cloth guide roller 2-1, and the cylinder shaft of the fourth cylinder 2-3 is fixedly connected with or props against the bearing seat 2-10 at the other end of the second cloth guide roller 2-1; When the second force sensor 2-5 is arranged at one end of the second cloth guide roller 2-1 provided with the fourth air cylinder 2-3, the second force sensor 2-5 is arranged on the air cylinder shaft of the fourth air cylinder 2-3, the second force sensor 2-5 is connected with or props against one end of the second cloth guide roller 2-1, the air cylinder shaft of the third air cylinder 2-2 is connected with or props against the other end of the second cloth guide roller 2-1, and in particular implementation, the lower end of the second force sensor 2-5 is preferably fixedly arranged on the air cylinder shaft of the fourth air cylinder 2-3, the upper end of the second force sensor 2-5 is preferably fixedly connected with or props against the bearing seat 2-10 at one end of the second cloth guide roller 2-1, and the air cylinder shaft of the third air cylinder 2-2 is fixedly connected with or props against the bearing seat 2-10 at the other end of the second cloth guide roller 2-1; When the two ends of the second cloth guide roller 2-1 are respectively provided with the second force sensors 2-5, the second force sensors 2-5 are respectively arranged on the cylinder shaft of the third cylinder 2-2 and the cylinder shaft of the fourth cylinder 2-3, the second force sensors 2-5 are connected with or propped against the two ends of the second cloth guide roller 2-1, and when the cloth guide roller is in specific implementation, the second force sensors 2-5 are respectively fixedly arranged on the cylinder shaft of the third cylinder 2-and the cylinder shaft of the fourth cylinder 2-3, and the upper ends of the second force sensors 2-5 are preferably fixedly connected with or propped against the bearing seats 2-10 at the two ends of the second cloth guide roller 2-1; the first force sensor 1-5, the second force sensor 2-5, the first air inlet regulating valve 1-4 and the second air inlet regulating valve 2-4 are connected with the central processing unit.
As a preferred embodiment of the present invention, as shown in fig. 2 to 5, the first fabric tension adjusting mechanism 1 further includes a first position sensor 1-6 and/or a second position sensor 1-7, where the first position sensor 1-6 and the second position sensor 1-7 are respectively connected to the cylinder shaft of the first cylinder 1-2 and the cylinder shaft of the second cylinder 1-3, and in a specific implementation, for example, when the two ends of the first fabric guiding roll 1-1 are respectively provided with the first force sensor 1-5, an upper adjusting plate 1-11 and a lower adjusting plate 1-12 are disposed between the first force sensor 1-5 and the first cylinder 1-2, the upper adjusting plate 1-11 is parallel to and spaced from the lower adjusting plate 1-12, the cylinder shaft of the first cylinder 1-2 is fixedly connected to the lower adjusting plate 1-12, the first force sensor 1-5 is fixedly connected to the upper adjusting plate 1-11 through a plurality of adjusting screws, the first position sensor 1-6 is connected to the lower adjusting plate 1-12, and the first position sensor 1-6 is connected to the lower adjusting plate 1-3 and the second adjusting plate 1-14 is disposed between the first position sensor 1-2 and the lower adjusting plate 1-2; the second fabric tension adjusting mechanism 2 further comprises a third position sensor 2-6 and/or a fourth position sensor 2-7, the third position sensor 2-6 and the fourth position sensor 2-7 are respectively connected with the cylinder shaft of the third cylinder 2-2 and the cylinder shaft of the fourth cylinder 2-3, when the second force sensor 2-5 is respectively arranged at two ends of the second cloth guide roller 2-1 in specific implementation, for example, an upper adjusting plate 2-11 and a lower adjusting plate 2-12 can be arranged between the second force sensor 2-5 and the third cylinder 2-2, the upper adjusting plate 2-11 is parallel to the lower adjusting plate 2-12 and is arranged at intervals, the cylinder shaft of the third cylinder 2-2 is fixedly connected with the lower adjusting plate 2-12, the second force sensor 2-5 is fixedly connected with the upper adjusting plate 2-11, the upper adjusting plate 2-11 is connected with the lower adjusting plate 2-12 through a plurality of adjusting screws, the third position sensor 2-6 is connected with the lower adjusting plate 2-12, and the second force sensor 2-5 can be connected with the fourth position sensor 2-6 and the fourth position sensor 2-7 at intervals, and the first position sensor 2-6 is connected with the fourth position sensor 2-7 and the fourth position sensor 2-12, and the second position sensor 2-7 is arranged between the second position sensor 2-5 and the fourth position sensor 2-3 and the fourth position sensor 2-2.
As a preferred embodiment of the present invention, as shown in fig. 1, 2 and 4, a first motor 1-8 and a first traction roller 1-9 driven to rotate by the first motor 1-8 are arranged on the fabric feeding side of the first fabric guiding roller 1-1, the first length measuring mechanism 3 is located between the first traction roller 1-9 and the rubber blanket shrinking unit a, preferably heating and pressing roller A1, a second motor 2-8 and a second traction roller 2-9 driven to rotate by the second motor 2-8 are arranged on the fabric discharging side of the second fabric guiding roller 2-1, the second length measuring mechanism 4 is located between the second traction roller 2-9 and the blanket drying unit B, preferably the blanket drying cylinder B1, and the first motor 1-8 and the second motor 2-8 are connected with the central processing unit. When the first position sensor 1-6 and/or the second position sensor 1-7 detect that the first cloth guide roller 1-1 deviates from the set allowable position range, the central processing unit controls and changes the rotating speed of the first traction roller 1-9 through the first motor 1-8, so that the position of the first cloth guide roller 1-1 is restored to the optimal state, and the synchronous operation of the fabric 5 and the fabric on the rubber blanket shrinkage unit A, namely the heating bearing roller A1 or the fabric on the wet drying cylinder A2, is further ensured through the first fabric tension adjusting mechanism 1; when the third position sensor 2-6 and/or the fourth position sensor 2-7 detect that the second cloth guide roller 2-1 deviates from the set allowable position range, the central processing unit controls and changes the rotating speed of the second traction roller 2-9 through the second motor 2-8, so that the position of the second cloth guide roller 2-9 is restored to the optimal state, and the synchronous operation of the fabric 5 and the fabric on the blanket drying unit B, preferably the blanket drying cylinder B1, through the second fabric tension adjusting mechanism 2 is further ensured.
As a preferred embodiment of the present invention, the first length measuring mechanism 3 and the second length measuring mechanism 4 are roller encoders, and may be mounted on any cloth guide roller, for example, the third cloth guide roller 6 and the fourth cloth guide roller 8, and the central processing unit is a digital controller with a man-machine interface, for example, a DDC digital controller, an embedded system, an industrial personal computer, or the like, and the central processing unit is not shown in the figure.
In the present invention, as shown in fig. 1, the first length measuring mechanism 3 and the second length measuring mechanism 4 may be laser length measuring sensors.
As a preferable working mode of the invention, the pre-shrinking calculation is that when the fabric tension of the fabric on the fabric feeding side of the rubber blanket shrinking unit and the fabric tension of the fabric on the fabric discharging side of the blanket drying unit are equal to or within the set tension allowable range, the pre-shrinking rate is calculated: the central processing unit receives the data of the first length measuring mechanism 3 and the second length measuring mechanism 4 at intervals of Δt, for example, 5 seconds, 8 seconds, and the like, calculates the fabric length L1 entering the rubber blanket and the fabric length L2 leaving the felt blanket at intervals of Δt, and thereby calculates the pre-shrinkage S, s= (L1-L2)/(l1×100%) at the intervals.
Through testing, the invention can accurately and on-line detect the preshrinking rate of the fabric running in the preshrinking machine, has reasonable and simple structure, good repeatability and high reliability, and achieves good effect.
Claims (4)
1. The utility model provides a preshrinking woven fabric preshrinking rate detection device for detect preshrinking machine operation fabric's preshrinking rate, preshrinking machine include rubber blanket shrink cloth unit (A) and woolen blanket stoving unit (B), its characterized in that: the pre-shrinking woven fabric pre-shrinking rate detection device comprises a first fabric tension adjustment mechanism (1) arranged on the fabric inlet side of a rubber blanket shrinking unit (A), a second fabric tension adjustment mechanism (2) arranged on the fabric outlet side of a blanket drying unit (B) and a central processing unit, wherein a first length measurement mechanism (3) for measuring the running length of a fabric is arranged on the fabric inlet side of the rubber blanket shrinking unit (A), a second length measurement mechanism (4) for measuring the running length of the fabric is arranged on the fabric outlet side of the blanket drying unit (B), and the first fabric tension adjustment mechanism (1), the second fabric tension adjustment mechanism (2), the first length measurement mechanism (3) and the second length measurement mechanism (4) are connected with the central processing unit;
A first fabric tension detection mechanism for detecting fabric tension is further arranged on the fabric inlet side of the rubber blanket shrinkage unit (A), a second fabric tension detection mechanism for detecting fabric tension is further arranged on the fabric outlet side of the blanket drying unit (B), and the first fabric tension detection mechanism and the second fabric tension detection mechanism are connected with the central processing unit;
The first fabric tension adjusting mechanism (1) comprises a first fabric guide roller (1-1) and a first air cylinder (1-2) and a second air cylinder (1-3) which are respectively arranged at two ends of the first fabric guide roller (1-1), wherein the first air cylinder (1-2) and the second air cylinder (1-3) are connected with a first air inlet adjusting valve (1-4), and an air cylinder shaft of the first air cylinder (1-2) and an air cylinder shaft of the second air cylinder (1-3) are respectively connected with or propped against two ends of the first fabric guide roller (1-1); the second fabric tension adjusting mechanism (2) comprises a second fabric guiding roller (2-1) and a third air cylinder (2-2) and a fourth air cylinder (2-3) which are respectively arranged at two ends of the second fabric guiding roller (2-1), the third air cylinder (2-2) and the fourth air cylinder (2-3) are connected with a second air inlet adjusting valve (2-4), an air cylinder shaft of the third air cylinder (2-2) and an air cylinder shaft of the fourth air cylinder (2-3) are respectively connected with or offset against two ends of the second fabric guiding roller (2-1), and the first air inlet adjusting valve (1-4) and the second air inlet adjusting valve (2-4) are controlled by the central processing unit;
The first fabric tension adjusting mechanism (1) comprises a first fabric guide roller (1-1) and a first air cylinder (1-2) and a second air cylinder (1-3) which are respectively arranged at two ends of the first fabric guide roller (1-1), the first air cylinder (1-2) and the second air cylinder (1-3) are connected with a first air inlet adjusting valve (1-4), the first fabric tension detecting mechanism comprises a first force sensor (1-5), at least one end of the first fabric guide roller (1-1) is provided with the first force sensor (1-5), when the first force sensor (1-5) is arranged at one end of the first fabric guide roller (1-1) provided with the first air cylinder (1-2), the first force sensor (1-5) is arranged on the cylinder shaft of the first cylinder (1-2), the first force sensor (1-5) is connected with or props against one end of the first cloth guide roller (1-1), and the cylinder shaft of the second cylinder (1-3) is connected with or props against the other end of the first cloth guide roller (1-1); When the first force sensor (1-5) is arranged at one end of the first cloth guide roller (1-1) provided with the second air cylinder (1-3), the first force sensor (1-5) is arranged on the air cylinder shaft of the second air cylinder (1-3), the first force sensor (1-5) is connected with or props against one end of the first cloth guide roller (1-1), and the air cylinder shaft of the first air cylinder (1-2) is connected with or props against the other end of the first cloth guide roller (1-1); when the first force sensors (1-5) are respectively arranged at the two ends of the first cloth guide roller (1-1), the first force sensors (1-5) are respectively arranged on the cylinder shaft of the first cylinder (1-2) and the cylinder shaft of the second cylinder (1-3), and the first force sensors (1-5) are connected with or propped against the two ends of the first cloth guide roller (1-1); The second fabric tension adjusting mechanism (2) comprises a second fabric guiding roller (2-1) and a third air cylinder (2-2) and a fourth air cylinder (2-3) which are respectively arranged at two ends of the second fabric guiding roller (2-1), the third air cylinder (2-2) and the fourth air cylinder (2-3) are connected with a second air inlet adjusting valve (2-4), the second fabric tension detecting mechanism comprises a second force sensor (2-5), at least one end of the second fabric guiding roller (2-1) is provided with the second force sensor (2-5), when the second force sensor (2-5) is arranged at one end of the second fabric guiding roller (2-1) provided with the third air cylinder (2-2), The second force sensor (2-5) is arranged on the cylinder shaft of the third cylinder (2-2), the second force sensor (2-5) is connected with or props against one end of the second cloth guide roller (2-1), and the cylinder shaft of the fourth cylinder (2-3) is connected with or props against the other end of the second cloth guide roller (2-1); when the second force sensor (2-5) is arranged at one end of the second cloth guide roller (2-1) provided with the fourth air cylinder (2-3), the second force sensor (2-5) is arranged on the air cylinder shaft of the fourth air cylinder (2-3), the second force sensor (2-5) is connected with or props against one end of the second cloth guide roller (2-1), and the air cylinder shaft of the third air cylinder (2-2) is connected with or props against the other end of the second cloth guide roller (2-1); when the two ends of the second cloth guide roller (2-1) are respectively provided with the second force sensors (2-5), the second force sensors (2-5) are respectively arranged on the cylinder shaft of the third cylinder (2-2) and the cylinder shaft of the fourth cylinder (2-3), and the second force sensors (2-5) are connected with or propped against the two ends of the second cloth guide roller (2-1); the first force sensor (1-5), the second force sensor (2-5), the first air inlet regulating valve (1-4) and the second air inlet regulating valve (2-4) are connected with the central processing unit.
2. The apparatus for detecting the preshrinking rate of a preshrinking woven fabric according to claim 1, wherein: the first fabric tension detection mechanism comprises a third cloth guide roller arranged on the cloth feeding side of the rubber blanket shrinkage unit (A), and a first force sensor is arranged at least one end of the third cloth guide roller; the second fabric tension detection mechanism comprises a fourth cloth guide roller arranged on the cloth outlet side of the woolen blanket drying unit (B), a second force sensor is arranged at least one end of the fourth cloth guide roller, and the first force sensor and the second force sensor are connected with the central processing unit.
3. The apparatus for detecting the preshrinking rate of a preshrinking woven fabric according to claim 1, wherein: the first fabric tension adjusting mechanism (1) further comprises a first position sensor (1-6) and/or a second position sensor (1-7), and the first position sensor (1-6) and the second position sensor (1-7) are respectively connected with a cylinder shaft of the first cylinder (1-2) and a cylinder shaft of the second cylinder (1-3); the second fabric tension adjusting mechanism (2) further comprises a third position sensor (2-6) and/or a fourth position sensor (2-7), the third position sensor (2-6) and the fourth position sensor (2-7) are respectively connected with the cylinder shaft of the third cylinder (2-2) and the cylinder shaft of the fourth cylinder (2-3), and the first position sensor (1-6), the second position sensor (1-7), the third position sensor (2-6) and the fourth position sensor (2-7) are connected with the central processing unit.
4. The apparatus for detecting the preshrinking rate of a preshrinking woven fabric according to claim 1, wherein: the cloth feeding side of the first cloth guide roller (1-1) is provided with a first motor (1-8) and a first traction roller (1-9) driven by the first motor (1-8), the first length measuring mechanism (3) is positioned between the first traction roller (1-9) and the rubber blanket shrinking unit (A), the cloth discharging side of the second cloth guide roller (2-1) is provided with a second motor (2-8) and a second traction roller (2-9) driven by the second motor (2-8), the second length measuring mechanism (4) is positioned between the second traction roller (2-9) and the blanket drying unit (B), the first motor (1-8) and the second motor (2-8) are connected with the central processing unit, the first length measuring mechanism (3) and the second length measuring mechanism (4) are roller encoders, and the central processing unit is a digital controller with a man-machine interface or an embedded system or an industrial control machine.
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| CN202011170757.7A CN112110261B (en) | 2020-10-28 | 2020-10-28 | Method and device for detecting preshrinking rate of preshrinking woven fabric |
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| CN113911800A (en) * | 2021-11-15 | 2022-01-11 | 常州宏大智能装备产业发展研究院有限公司 | Intelligent control method and device for pre-shrinking rate of pre-shrunk woven fabric |
| CN117819298B (en) * | 2024-03-06 | 2024-05-28 | 常州宏大智慧科技有限公司 | Wire belt tension control device and wire belt conveying assembly applying same |
| CN118326627A (en) * | 2024-04-30 | 2024-07-12 | 东莞泉威智能科技有限公司 | Pre-shrinking percentage control process based on fabric pre-shrinking machine application |
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| CN212639406U (en) * | 2020-10-28 | 2021-03-02 | 常州宏大智能装备产业发展研究院有限公司 | Pre-shrinking rate detection device for pre-shrinking woven fabric |
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| JP4404437B2 (en) * | 2000-03-31 | 2010-01-27 | 日本電産シンポ株式会社 | Warp tension detector and loom |
| CN2536617Y (en) * | 2002-02-26 | 2003-02-19 | 无锡市联昌工控设备有限公司 | Closed loop controller for shrinkage of rubber carpet style pre-shrinking apparatus |
| DE102006008835B4 (en) * | 2006-02-25 | 2008-08-21 | Koenig & Bauer Aktiengesellschaft | Printing machine with web tension control |
| CN104692172A (en) * | 2014-12-29 | 2015-06-10 | 东莞市顺翼机械有限公司 | Constant tension detection control mechanism and its control method |
| CN107235359A (en) * | 2017-06-12 | 2017-10-10 | 南京嘉旭机械制造股份有限公司 | A kind of Length Control system |
| CN210561272U (en) * | 2019-06-24 | 2020-05-19 | 常州金隆益群医用卫生材料有限公司 | Preshrinking machine |
| CN110844666B (en) * | 2019-10-30 | 2021-12-10 | 广东溢达纺织有限公司 | Automatic stacking control system, method and device for fabric discharging deviation |
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| CN212639406U (en) * | 2020-10-28 | 2021-03-02 | 常州宏大智能装备产业发展研究院有限公司 | Pre-shrinking rate detection device for pre-shrinking woven fabric |
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