CN220266009U - Tension detection yarn feeder and tension feedback yarn feeding control system - Google Patents

Abstract

The utility model relates to the technical field of textile machinery, and provides a tension detection yarn feeder and a tension feedback yarn feeding control system, wherein the tension detection yarn feeder comprises a support, a shell is arranged at the bottom of the right side of the support, a tension sensor is arranged in the shell, a yarn outlet bracket is arranged on the left side of the tension sensor, a yarn outlet porcelain eye I is fixed on the yarn outlet bracket, and a yarn outlet porcelain eye II is arranged on the right side of the tension sensor; a tension detection circuit board is arranged in the shell, wherein the tension sensor is obliquely arranged and installed, a strain gauge is positioned on one side close to the yarn outlet porcelain eye, and the free end of the strain gauge is positioned at the bottom. The yarn feeding device can accurately detect tension data of yarns while feeding yarns, and transmits the tension data to the knitting machine in real time, and the main controller of the knitting machine controls the electric cam part to drive the cam to adjust the upper and lower positions so as to adjust yarn feeding quantity and tension of the yarns.

Description

Tension detection yarn feeder and tension feedback yarn feeding control system

Technical Field

The utility model relates to the technical field of textile machinery, in particular to a tension detection yarn feeder and a tension feedback yarn feeding control system.

Background

In the prior art, when producing cloth varieties with different degrees of tightness, a large circular knitting machine generally sends an instruction to a yarn feeding motor through a main controller according to a new bill, the yarn feeding motor is controlled to drive a belt to rotate according to a set yarn feeding length, the belt drives a yarn feeder to feed yarns, knitting needles of a needle cylinder carry out knitting, and tightness of producing cloth is slowly adjusted until the yarn feeding length completely meets the requirement. In this process, the yarn delivery tension of the circular knitting machine is generally determined by hand feeling by manual experience or by a special instrument for measuring yarn tension, however, the manual experience often differs and is inaccurate in the yarn tension determination of each strand, and the special instrument is expensive, one for each yarn, and the cost increases dramatically. In addition, after the tension data of yarn is obtained, the prior art mainly adjusts the upper and lower positions of the triangle through the calibrated scale on the manual regulation triangle seat to adjust the yarn feeding amount of yarn, and the tension data is required to be measured constantly in this adjustment process, and the adjustment process is tedious and time-consuming and laborious. The tension detection yarn feeder has the advantages that the tension detection yarn feeder has the tension effect of detecting yarns when yarn is fed, and can reduce the time for switching cloth varieties of a production line by matching with a main controller of a circular knitting machine, an electric regulating triangle and other novel structures, ensure the automatic quality control of cloth pieces in the production process, reduce the machine regulating requirement in the production process and greatly improve the overall automation level of knitting machines.

Disclosure of Invention

Therefore, in order to solve the above problems, the present utility model provides a tension detecting yarn feeder, which can accurately detect tension data of yarn while feeding yarn, and provides a tension feedback yarn feeding control system, which measures yarn tension and transmits the tension data to a knitting machine in real time, wherein a main controller of the knitting machine controls an electric cam part to drive the cam to adjust up and down positions so as to adjust yarn feeding amount and yarn tension, thereby reducing cloth variety switching time, and solving the problems mentioned in the background art.

In order to solve the technical problem, the utility model adopts the following scheme: the tension detection yarn feeder comprises a support, wherein the support is vertically provided with a rotating shaft, a fixed wheel is arranged at the top of the rotating shaft positioned on the support, and a yarn feeding wheel is arranged below the rotating shaft positioned on the support; a yarn feeding bracket is arranged on the left side of the support, a yarn feeding porcelain eye I and a yarn feeding porcelain eye II are respectively arranged at the top and the bottom of the yarn feeding bracket, a yarn scraping blade is arranged in the middle of the yarn feeding bracket, and an elastic yarn clamping device is arranged below the yarn scraping blade; the yarn feeding device comprises a support, a yarn feeding porcelain eye and a yarn feeding porcelain eye, wherein the yarn feeding porcelain eye is arranged on the left side of the support; the yarn feeding device is characterized in that a tension detection circuit board is arranged in the shell, wherein the tension sensor is obliquely arranged and installed, a strain gauge is positioned close to one side of the yarn feeding porcelain eye, and the free end of the strain gauge is positioned at the bottom.

Further, the top of the free end of the strain gauge is fixed with a ceramic piece, and the top surface of the ceramic piece is in an arc-shaped structure.

Further, the strain gauge adopts a high-elasticity steel sheet.

Further, the tension detection circuit board comprises a central control unit, a tension interface circuit, a power supply unit, a display screen circuit board and a communication module; the tension interface circuit, the display screen circuit board and the communication module are connected with the central control unit; the tension interface circuit is used for connecting a tension sensor to acquire tension data of yarns; the display screen circuit board is used for displaying working data of the tension detection yarn feeder and performing functional operation on equipment, and the power supply unit supplies power for the tension detection yarn feeder.

Further, the communication module may be an RS485 communication module or a CAN bus communication module.

Further, the central control unit is respectively connected with a DI processing unit and a DO processing unit, and the DI processing unit and the DO processing unit respectively reserve a DI interface and a DO interface, so that signal input and alarm output can be realized.

Further, the central control unit is connected with a USB interface module for directly connecting a computer with equipment to adjust, modify and download data.

Further, the power supply communication interface is a power supply & communication interface and comprises 8 pins of 24V power supply, 485 communication, DI, DO and the like.

Further, the display screen circuit board comprises a liquid crystal display screen interface circuit, a display module and a key control circuit; the liquid crystal display screen interface circuit is respectively connected with the display module and the key control circuit; the display module is used for providing an operation interface and displaying working data of the tension detection yarn feeder; the key control circuit is used for operating the functions of the equipment.

Further, the device also comprises a downloading port circuit and a debugging port circuit, wherein the downloading port circuit provides a data downloading interface during mass production, and the debugging port circuit is used as a reserved interface for debugging operation.

The utility model also provides a tension feedback yarn feeding control system which comprises a plurality of tension detection yarn feeders, wherein the tension detection yarn feeders are respectively connected to a main controller in a 485 communication mode or a CAN bus mode, and the main controller is connected with a plurality of electric triangular components.

Further, the electric triangular component comprises a triangular mounting seat, a mounting groove is formed in the front side of the triangular mounting seat, sliding grooves are respectively formed in two sides of the mounting groove, a sliding block is arranged in the mounting groove, and sliding strips which are in sliding connection with the sliding grooves in a matching mode are respectively arranged on two sides of the sliding block in a protruding mode; the rear side of the triangular mounting seat is fixedly provided with a micro motor, an output shaft of the micro motor penetrates through the mounting groove, a gear is fixed at the end part of the micro motor, the rear side of the sliding block is fixedly provided with a rack, and the gear is in meshed connection with the rack; the front side of the sliding block is fixed with a plurality of triangles from top to bottom through bolts.

Further, the main controller is connected with 4 paths of CAN buses or 485 buses, and each path of CAN buses or 485 buses is respectively connected with N tension detection yarn feeders.

Further, the maximum value of N is taken to be 32.

Advantageous effects

Compared with the prior art, the utility model at least comprises the following advantages: a tension sensor is fixed in a shell arranged at one side of the bottom of the tension detection yarn feeder, and is positioned on a yarn feeding path to detect the tension of yarns. The tension interface circuit of the tension detection circuit board is used for transmitting tension detection data to the singlechip of the central control unit, the singlechip receives the detection data of the tension sensor to perform data processing, and the processed data is transmitted to the main controller of the knitting equipment through the communication module. When cloth products with different tightness are required to be transferred, the yarn feeding motor of the knitting machine drives the belt to rotate so as to control the yarn feeding amount of the yarn feeder, the knitting machine obtains tension data of each path of yarn, the triangles of each corresponding electric triangle part are controlled to adjust the upper and lower positions, the yarn feeding amount is controlled, the yarn tension is enabled to be in a reliable range while the conversion of the cloth products is realized, and the knitting machine can realize functions of transfer automation, production automation and the like of cloth with different tightness.

Drawings

FIG. 1 is a schematic view of the tension detecting yarn feeder of the present utility model;

FIG. 2 is a schematic cross-sectional view of the tension detecting yarn feeder of the present utility model;

FIG. 3 is a schematic diagram of a tension sensor according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of an electric delta component according to an embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of an electric delta component in accordance with an embodiment of the present utility model;

FIG. 6 is a block diagram of a tension detecting circuit board according to an embodiment of the present utility model;

FIG. 7 is a schematic circuit diagram of a singlechip according to an embodiment of the utility model;

FIG. 8 is a schematic circuit diagram of a tension interface circuit according to an embodiment of the present utility model;

FIG. 9 is a schematic circuit diagram of DI processing units and DO processing units according to an embodiment of the present utility model;

FIG. 10 is a schematic circuit diagram of a power communication interface according to an embodiment of the present utility model;

FIG. 11 is a schematic circuit diagram of an RS485 communication module according to an embodiment of the utility model;

FIG. 12 is a schematic circuit diagram of a USB interface module according to an embodiment of the present utility model;

FIG. 13 is a circuit schematic of download port circuitry and debug interface circuitry in accordance with an embodiment of the present utility model;

FIG. 14 is a schematic circuit diagram of a display screen circuit board according to an embodiment of the present utility model;

fig. 15 is a schematic circuit diagram of a bridge rectifier circuit and power supply of the present utility model.

The drawing is marked: 1-a support; 2-a yarn feeding bracket; 2 a-riser one; 2 b-a cross plate; 2 c-a second vertical plate; 2 d-an upper endplate; 2 e-convex plates; 2 f-side plates; 2 g-floor; 2 h-lower end plate; 3-feeding yarn porcelain eyes I; 4-yarn scraping blades; 5-spring wire clamp; 6-front probe rod; 7-a yarn conveying wheel; 8-a yarn-out porcelain eye I; 9-a tension sensor; 90-strain gage; 91-a stressed ceramic part; 92-a signal processing circuit board; 10-a display screen; 11-key; 12-feeding yarn porcelain eyes II; 13-a yarn outlet bracket; 14-a second yarn outlet porcelain eye; 15-a housing; 16-circuit plug; 17-an electric control triangle; 170-a triangle mount; 171-a micro motor; 172-a slider; 173-triangle; 174-mounting groove; 175-rack; 176-gear; 177-slide bar; 178-chute; 18-rotating shaft; 19-shaft sleeve; 20-fixing wheels; a 21-DI processing unit; a 22-DO processing unit; 23-a download port circuit; 24-debug port circuitry; 25-a display module; 26-a key control circuit; 27-a liquid crystal display interface circuit; 28-an indicator light module; 29-a bridge rectifier circuit; a 30-24V to 5V power conversion circuit; 31-a power supply voltage detection circuit; 32-a power failure detection circuit; a 33-5V to 3.3V power conversion circuit; 34-an electrostatic derivation circuit.

Detailed Description

The utility model will now be further described with reference to the drawings and detailed description.

Referring to fig. 1-15, the tension detecting yarn feeder comprises a support 1, wherein the support 1 is vertically provided with a rotating shaft 18, 2 fixed wheels 20 are installed on the top of the support 1 by the rotating shaft 18, a yarn feeding wheel 7 is installed below the support 1 by the rotating shaft 18, and a shaft sleeve 19 is arranged between the rotating shaft 18 and the fixed wheels 20, the yarn feeding wheel 7 and the support 1. When a plurality of tension detection yarn feeders are installed on the circular knitting machine in a surrounding mode, belts are arranged on the outer sides of the fixed wheels of the tension detection yarn feeders and driven by yarn feeding motors to rotate, and accordingly the belts drive the fixed wheels 20 to rotate, and synchronous rotation is achieved between the fixed wheels 20 and the yarn feeding wheels 7.

The left side of the support 1 is provided with a yarn feeding bracket 2. The yarn feeding support 2 comprises a first vertical plate 2a fixed with the support 1, the top of the first vertical plate 2a is connected with a transverse plate 2b, the top surface of the end part of the transverse plate 2b is connected with a second vertical plate 2c, the top of the second vertical plate 2c is connected with an upper end plate 2d which is obliquely arranged, the upper end plate 2d is provided with a yarn feeding porcelain eye 3, the transverse plate 2a extends outwards and even is provided with a convex plate, and the convex plate 2e is positioned in the middle of the yarn feeding support 2 and is provided with a yarn scraping blade 4. A side plate 2f is fixed on one side of the first vertical plate 2a, an elastic thread clamp 5 is arranged on the side plate 2f, and the elastic thread clamp 5 is positioned below the yarn scraping blade 4. The bottom of riser one 2a is fixed with lower end plate 2h, the bottom of lower end plate 2h is fixed with bottom plate 2g, yarn porcelain eye two 12 is advanced to bottom plate 2 g's installation, lower end plate 2h is located one side of bottom plate 2g is provided with the breach. The support 1 is rotatably connected with a front probe rod 6. The housing 15 is provided with a display screen 10 and keys 11.

As shown in fig. 1 and 2, a casing 15 is disposed at the bottom of the right side of the support 1, a tension sensor 9 is disposed inside the casing 1, a yarn outlet bracket 13 is disposed at the left side of the tension sensor 9, a yarn outlet porcelain eye one 8 is fixed on the yarn outlet bracket 13, and a yarn outlet porcelain eye two 14 is disposed at the right side of the tension sensor 9; a tension detection circuit board is arranged in the shell 1. In the technical scheme of the utility model, the tension sensor 9 is obliquely arranged and installed, the strain gauge is positioned at one side close to the yarn outlet porcelain eye 8, the free end of the strain gauge 90 is positioned at the bottom, the ceramic piece 91 is fixed at the top of the free end of the strain gauge 90, and the top surface of the ceramic piece 91 is in an arc-shaped structure, so that the ceramic piece 91 is in a semi-cylindrical structure. In this embodiment, an arc groove adapted to the ceramic member 91 is provided on the bottom surface of the housing 15, and the yarn passes through the gap between the arc groove and the ceramic member 15. The strain gauge adopts a high-elasticity steel sheet. Preferably, 2 jacks are arranged at the free ends of the strain gauges, fixing columns corresponding to the two jacks are arranged at the bottoms of the ceramic pieces 91, and the fixing columns are inserted into the jacks to strengthen the connection firmness of the ceramic pieces 91 and the strain gauges.

In a specific application, the yarn enters from the yarn feeding porcelain eye 3, sequentially passes through the yarn scraping blade 4 and the elastic yarn clamping device 5, then enters the yarn feeding porcelain eye 12 from the bottom of the front probe rod 6, the yarn passing through the yarn feeding porcelain eye 12 is wound on the yarn conveying wheel 7, finally passes through the yarn discharging porcelain eye 8, the ceramic piece 91 and the yarn discharging porcelain eye 14, and the yarn output by the yarn discharging porcelain eye 4 is woven by a knitting needle on the needle cylinder through a yarn guide seat of the circular knitting machine. Along with the change of yarn conveying tension, the free end of the strain gauge is displaced due to the traction of the yarn and the ceramic piece 91, so that the strain gauge 90 is elastically changed up and down, and the signal processing circuit board 92 arranged on the tension sensor 9 amplifies the electric signal of the strain gauge and outputs the electric signal to the tension detection circuit board.

As shown in fig. 6, the tension detection circuit board comprises a central control unit, a tension interface circuit, a power supply unit, a display screen circuit board and a communication module; the tension interface circuit, the display screen circuit board and the communication module are connected with the central control unit; the tension interface circuit is used for connecting a tension sensor to collect the tension of the yarn; the display screen circuit board is used for displaying working data of the tension detection yarn feeder and performing functional operation on equipment, and the power supply unit supplies power for the tension detection yarn feeder.

In this embodiment, as shown in fig. 7, the central control unit adopts a single chip microcomputer with model number M483SIDAE and its peripheral circuits. As shown in fig. 8, the tension interface circuit includes a pin header J3 of 2×4, and pins 3 and 5 of the pin header J3 are respectively connected to pins 56 and 55 of the single chip microcomputer through resistors, and are connected to the tension sensor 9 through the pin header J3.

The communication module CAN be an RS485 communication module or a CAN bus communication module. In this embodiment, the communication module is an RS485 communication module, as shown in fig. 11, where the RS485 communication module includes an RS-485 transceiver with a model number of SP485 and its peripheral circuit. The 35 th pin and the 36 th pin of the singlechip are respectively connected with the 4 th pin and the 1 st pin of the SP485 transceiver, and the tension detection yarn feeder and the superior equipment (namely knitting machinery) are communicated in a 485 communication mode for data communication through the RS485 communication module.

In this embodiment, the 64 th pin and the 63 rd pin of the singlechip are respectively connected with a DI processing unit 1 and a DO processing unit 2, and DI interfaces and DO interfaces are reserved in the DI processing unit 1 and the DO processing unit 2 respectively, so that signal input and alarm output can be realized. The DI interface is a data input interface, and the DO interface is a data output interface. As shown in fig. 9, the DI processing unit 1 is a data input processing unit, and includes an ac input photocoupler of the type EL3H4 and its peripheral circuits. The DO processing unit 2 is a data output processing unit, and includes a relay with a model number KAQY214STLD and a peripheral circuit thereof.

In this embodiment, the central control unit is connected with a USB interface module, and is used for directly connecting a computer with a device to perform data adjustment, modification and downloading. As shown in FIG. 12, the USB interface module adopts mini_USB, and the 1 st, 2 nd, 3 rd and 4 th pins of the mini_USB are respectively connected to the 43 rd, 44 th, 46 th and 48 th pins of the singlechip. The embodiment also comprises a power supply communication interface, wherein the power supply communication interface is a power supply and communication interface and comprises 8 pins of 24V power supply, 485 communication, DI, DO and the like.

In this embodiment, the display screen circuit board includes a liquid crystal display screen interface circuit 7, a display module 5 and a key control circuit 6, where the liquid crystal display screen interface circuit is connected with the display module and the key control circuit respectively. The display module is used for providing an operation interface and displaying working data of the tension detection yarn feeder. The key control circuit is used for operating functions of the equipment, such as calibration and zero clearing of a sensor, setting of communication parameters and parameter adjustment of a display screen. The setting of the communication parameters comprises setting the baud rate and the node number. The node number is the number of the tension detecting yarn feeder. The parameter settings of the display screen comprise display screen brightness, positive and negative colors, rotation, screen lighting time and the like. The display screen interface circuit 7 is connected with the singlechip. Preferably, the display screen circuit board further comprises an indicator light module 8, which is used as a status indicator light function of the display screen circuit board.

In this embodiment, the tension detection circuit board further includes a download port circuit 3 and a debug port circuit 4, where the download port circuit 3 provides a data download interface for mass production, and the debug port circuit 4 is used as a reserved interface for debug operation.

In the specific implementation process, the tension sensor detects the tension of the yarn, the tension interface circuit transmits data to the singlechip of the central control unit, the singlechip receives the detection data of the tension sensor to perform data processing, and the processed data is packaged and transmitted to the upper control equipment through the communication module.

The power supply unit is used for supplying power, and the power supply unit comprises a 24V-to-5V power supply conversion circuit, a power supply voltage detection circuit, a power supply power failure detection circuit and a 5V-to-3.3V power supply conversion circuit. The tension detection yarn feeder is externally connected with an alternating current/direct current 9V or 24V power supply, and is rectified by a bridge rectifier circuit and input into a 24V-to-5V power supply conversion circuit, a power supply voltage detection circuit and a power supply power failure detection circuit. The 24V-to-5V power supply conversion circuit converts externally input AC/DC 24V into DC 5V, the power supply voltage detection circuit is used for detecting the voltage of the power supply input end, and the power supply power failure detection circuit is used for detecting the voltage of the 5V output end. Preferably, the power supply unit further includes an electrostatic discharge circuit 14 for discharging the static electricity of the tension detecting yarn feeder, so as to avoid the problem of yarn winding caused by static electricity aggregation.

The utility model also provides a tension feedback yarn feeding control system which comprises a plurality of tension detection yarn feeding devices, wherein the tension detection yarn feeding devices are respectively connected to a main controller of the knitting machine in a 485 communication mode or a CAN bus mode. Each tension detection yarn feeder is correspondingly provided with a node number, and each node number corresponds to tension data of one path of yarn. The yarn tension data includes real-time values of the yarn, a cycle maximum value, a cycle minimum value, and a cycle average value for one measurement cycle. The singlechip compares the obtained yarn tension data with a preset value, can rapidly judge whether the yarn is broken or not, and the tension detection yarn feeder can give an alarm for yarn breakage; and the alarm of the thread hooking and the alarm of the tension range can be carried out according to the tension data.

In this embodiment, the main controller is connected with 4 paths of CAN buses or 485 buses, and each path of CAN buses or 485 buses is respectively connected with 32 tension detection yarn feeders.

The main controller is connected with 32 electric triangle parts 17. The electric triangle 17 comprises a triangle mounting seat 170, a mounting groove 174 is formed in the front side of the triangle mounting seat 170, sliding grooves 178 are respectively formed in two sides of the mounting groove 174, a sliding block 172 is arranged in the mounting groove 174, and sliding strips 177 which are in sliding connection with the sliding grooves 178 in a matching manner are respectively and convexly arranged on two sides of the sliding block 172; a micro motor 171 is fixed at the rear side of the triangle mounting seat 170, an output shaft of the micro motor 171 penetrates through the mounting groove 174, a gear 176 is fixed at the end of the micro motor, a rack 175 is fixed at the rear side of the slider 172, and the gear 176 is in meshed connection with the rack 175; the front side of the slider 172 is fixed with a plurality of cams 173 by bolts from top to bottom.

In specific application, cloth pieces with different degrees of tightness are required to be produced in a conversion mode, and shutdown is not required. The main controller drives the yarn feeding motor of the circular knitting machine to work according to the set rotating speed according to the yarn feeding length requirement of the fabric product to be knitted, and the yarn feeding motor drives the belt to rotate so as to drive the fixed wheel of the tension detection yarn feeder to rotate, and the yarn feeding wheels synchronously rotate to feed yarns. The faster the feed motor rotates, the faster the feed wheel rotates, and the faster the yarn is fed, whereas the slower the feed motor rotates, the slower the feed wheel rotates, and the slower the yarn is fed.

The knitting needle arranged on the needle cylinder of the large circular knitting machine carries out knitting action along the triangular track, and the tightness of the cloth is slowly adjusted, but the tension of the yarn in the process must be within a set range so as to prevent the yarn from being excessively loosened. In the adjustment process, a tension sensor of a yarn conveying tension detection yarn conveyer monitors the tension of the yarn and transmits the tension to a singlechip, the singlechip processes data and transmits processed tension data to a main controller of a circular knitting machine in a 485 communication mode, the main controller processes the data according to the received tension data and sends a control instruction to an electric triangle component corresponding to the yarn, a micro motor is controlled to rotate, the micro motor rotates to drive a gear to rotate, the gear rotates to drive a rack to move up and down, so that the upper position and the lower position of a triangle are adjusted, knitting needles which perform knitting actions by the triangle are changed along with the change of the upper position and the lower position of the triangle, and yarn feeding quantity is changed under the influence of the adjustment of the triangle position, so that the tension data of the yarn is in a data range allowed when the cloth piece variety is adjusted. In the adjustment process, the higher the triangular position is, the less the yarn is used, the denser the cloth is, and on the contrary, the lower the triangular position is, the greater the yarn is used, and the looser the cloth is. When the yarn feeding length of the yarn reaches the requirement, the main controller controls the electric triangular part to finely adjust, if the yarn is too tight, the triangular part is adjusted upwards, and if the yarn is too loose, the triangular part is adjusted downwards, so that the tension of the yarn meets the requirement of constant tension, the cloth piece variety adjustment is finished, and the original time for manually adjusting the triangular part and the tension of the yarn is greatly shortened.

The utility model shortens the period time of detecting the yarn feeding amount of the cam control of the knitting machine by tension, further reduces the time of switching products of a production line, and avoids the complicated work and the consumed time caused by manually adjusting the cam when the varieties of the produced cloth are replaced.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. The tension detection yarn feeder is characterized by comprising a support, wherein the support is vertically provided with a rotating shaft, a fixed wheel is arranged at the top of the rotating shaft positioned on the support, and a yarn feeding wheel is arranged below the rotating shaft positioned on the support; a yarn feeding bracket is arranged on the left side of the support, a yarn feeding porcelain eye I and a yarn feeding porcelain eye II are respectively arranged at the top and the bottom of the yarn feeding bracket, a yarn scraping blade is arranged in the middle of the yarn feeding bracket, and an elastic yarn clamping device is arranged below the yarn scraping blade; the yarn feeding device comprises a support, a yarn feeding porcelain eye and a yarn feeding porcelain eye, wherein the yarn feeding porcelain eye is arranged on the left side of the support; a tension detection circuit board is arranged in the shell; the tension sensor is obliquely arranged and installed, the strain gauge is located on one side close to the yarn outlet porcelain eye, and the free end of the strain gauge is located at the bottom.

2. The tension detecting yarn feeder as in claim 1, wherein the top of the free end of the strain gauge is fixed with a ceramic member, and the top surface of the ceramic member is arranged in an arc-shaped structure.

3. The tension detecting yarn feeder of claim 1, wherein the strain gauge is a high elastic steel sheet.

4. The tension detecting yarn feeder as in claim 1, wherein the tension detecting circuit board comprises a central control unit, a tension interface circuit, a power supply unit, a display screen circuit board and a communication module; the tension interface circuit, the display screen circuit board and the communication module are connected with the central control unit; the tension interface circuit is used for connecting a tension sensor to acquire tension data of yarns; the display screen circuit board is used for displaying working data of the tension detection yarn feeder and performing functional operation on equipment, and the power supply unit supplies power for the tension detection yarn feeder.

5. The yarn feeder according to claim 4, wherein the central control unit is respectively connected with a DI processing unit and a DO processing unit, and the DI processing unit and the DO processing unit respectively reserve a DI interface and a DO interface, so that signal input and alarm output can be realized.

6. The tension detecting yarn feeder as in claim 4, wherein the display screen circuit board comprises a liquid crystal display screen interface circuit, a display module and a key control circuit; the liquid crystal display screen interface circuit is respectively connected with the display module and the key control circuit; the display module is used for providing an operation interface and displaying working data of the tension detection yarn feeder; the key control circuit is used for operating the functions of the equipment.

7. A tension feedback yarn feeding control system, comprising a plurality of tension detection yarn feeders as claimed in any one of claims 1 to 6, wherein a plurality of tension detection yarn feeders are respectively connected to a main controller by 485 communication or CAN bus, and the main controller is connected with a plurality of electric triangle parts.

8. The tension feedback yarn feeding control system according to claim 7, wherein the electric triangular component comprises a triangular mounting seat, a mounting groove is formed in the front side of the triangular mounting seat, sliding grooves are respectively formed in two sides of the mounting groove, sliding blocks are arranged in the mounting groove, and sliding strips which are in sliding connection with the sliding grooves in a matched mode are respectively arranged on two sides of the sliding blocks in a protruding mode; the rear side of the triangular mounting seat is fixedly provided with a micro motor, an output shaft of the micro motor penetrates through the mounting groove, a gear is fixed at the end part of the micro motor, the rear side of the sliding block is fixedly provided with a rack, and the gear is in meshed connection with the rack; the front side of the sliding block is fixed with a plurality of triangles from top to bottom through bolts.

9. The tension feedback yarn feeding control system as claimed in claim 7, wherein the main controller is connected with 4 paths of CAN buses or 485 buses, and each path of CAN buses or 485 buses is respectively connected with N tension detection yarn feeders.

10. A tension feedback yarn feeding control system as in claim 9, wherein N is at a maximum of 32.