Silk thread cleanliness evaluation system

Abstract

The utility model relates to the technical field of silk thread cleanliness evaluation, in particular to a silk thread cleanliness evaluation system. The utility model provides a silk thread cleanliness evaluation system. The silk thread cleanliness evaluation system comprises a charged dust collection unit; the charged dust collection unit comprises a corona wire and a cathode dust collection plate; the cathode dust collection plate comprises a first arc-shaped cathode dust collection plate and a second arc-shaped cathode dust collection plate which are symmetrically distributed; the first arc-shaped cathode dust collection plate and the second arc-shaped cathode dust collection plate form a tubular cavity; and the corona wire is positioned at the axial center position of the tubular cavity. According to the silk thread cleanliness evaluation system provided by the utility model, the continuous quantitative evaluation on the silk thread surface cleanliness can be realized through the difference value of the electric charge adsorption quantity of the two symmetrical dust collection plates.

Description

Technical Field

[0001] This utility model relates to the field of silk thread cleanliness evaluation technology, and more specifically, to a silk thread cleanliness evaluation system. Background Technology

[0002] During the fabrication process, the surface of the yarn easily adsorbs micro-dust particles. These particles can easily become embedded inside the yarn or remain on the surface during subsequent drawing, annealing, or rewinding processes, thus deteriorating the yarn's performance.

[0003] Currently, the main method for evaluating the surface cleanliness of yarn is macroscopic visual inspection using a stereomicroscope. This method requires inspectors to have extensive testing experience, can only provide qualitative evaluations, and can only visually inspect the outermost layer of yarn on the spool, limiting the number of samples that can be tested.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] The purpose of this invention is to provide a yarn cleanliness evaluation system that can continuously and quantitatively evaluate the cleanliness of the yarn surface by using the difference in the amount of charge adsorbed by two symmetrical dust collection plates.

[0006] In order to achieve the above-mentioned objectives of this utility model, the following technical solution is adopted:

[0007] This utility model provides a yarn cleanliness evaluation system, including: a charged dust collection unit;

[0008] The charged dust collection unit includes a corona wire and a cathode dust collection plate; the cathode dust collection plate includes a first arc-shaped cathode dust collection plate and a second arc-shaped cathode dust collection plate symmetrically distributed; the first arc-shaped cathode dust collection plate and the second arc-shaped cathode dust collection plate form a tubular cavity; the corona wire is located at the axial center of the tubular cavity.

[0009] Furthermore, the yarn cleanliness evaluation system also includes a measurement unit;

[0010] The measuring unit includes a first charge measuring device and a second charge measuring device; the first charge measuring device is connected to the first arc-shaped cathode dust collection plate; the second charge measuring device is connected to the second arc-shaped cathode dust collection plate.

[0011] Furthermore, the diameter of the corona wire is 2-3 mm;

[0012] And / or, the length of the corona wire is 150–450 mm.

[0013] Furthermore, the inner radius of the tubular cavity is 1–2 cm;

[0014] And / or, the length of the cathode dust collection plate is 100-300 mm.

[0015] Furthermore, the curvature of the first arc-shaped cathode dust collection plate is 150° to 170°;

[0016] The curvature of the first arc-shaped cathode dust collection plate is the same as that of the second arc-shaped cathode dust collection plate.

[0017] Furthermore, the silk thread cleanliness evaluation system also includes a power supply; the corona wire is connected to the positive terminal of the power supply, and the tubular cathode plate is connected to the negative terminal of the power supply.

[0018] Furthermore, the first charge measurement device is disposed between the first arc-shaped cathode dust collection plate and the negative terminal of the power supply;

[0019] And / or, the second charge measurement device is disposed between the second arc-shaped cathode dust collection plate and the negative terminal of the power supply.

[0020] Furthermore, the wire cleanliness evaluation system also includes a support unit, which includes a support rod and a support plate; the support rod is used to support the corona wire; and the support plate is used to support the first arc-shaped cathode dust collection plate and the second arc-shaped cathode dust collection plate.

[0021] Furthermore, the support rod is located at both ends of the corona wire;

[0022] And / or, the outer walls of the first arc-shaped cathode dust collection plate and the second arc-shaped cathode dust collection plate are provided with protrusions, and the protrusions cooperate with the grooves of the support plate.

[0023] Furthermore, the yarn cleanliness evaluation system also includes a moving unit; the moving unit includes a pay-off shaft, a tension wheel, a first guide wheel, a second guide wheel, and a take-up shaft arranged in sequence; the charged dust collection unit is disposed between the first guide wheel and the second guide wheel.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] The yarn cleanliness evaluation system provided by this utility model includes a corona wire and two symmetrical cathode dust collection plates. It ionizes the local air through the corona effect. When the yarn passes through the charged dust collection unit, the particles on the yarn surface and in the air become charged and are adsorbed by the two symmetrical cathode dust collection plates under the action of the electric field. The difference in the amount of charge adsorbed by the two cathode dust collection plates eliminates the influence of the amount of charge of particles in the air and only represents the amount of charge of particles adsorbed on the yarn surface. This amount of charge is proportional to the number of adsorbed particles. Therefore, the cleanliness of the yarn surface can be quantitatively evaluated by the difference in charge, and the yarn surface can be cleaned at the same time.

[0026] The yarn cleanliness evaluation system provided by this utility model can calculate the cumulative charge, thereby realizing continuous evaluation of the entire roll of yarn.

[0027] The yarn cleanliness evaluation system provided by this utility model has a simple structure and is easy to integrate into the back end of drawing or annealing equipment. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a structural diagram of the silk thread cleanliness evaluation system of this utility model.

[0030] Figure 2 This is a schematic diagram of the connection relationship of the yarn cleanliness evaluation system of this utility model.

[0031] Figure 3 This is a schematic diagram of the charged dust collection unit of this utility model.

[0032] Figure 4 This is a schematic diagram of the structure of the charged dust collection unit of this utility model.

[0033] Figure 5 This is a schematic diagram of the charged dust collection unit and support unit of this utility model.

[0034] Figure 6 This is a schematic diagram of the charge measurement device of this utility model.

[0035] Figure 7 This is a schematic diagram of the DC power supply of this utility model.

[0036] Figure label:

[0037] 1-Charged dust collection unit; 11-Corona wire;

[0038] 12-First arc-shaped cathode dust collection plate; 13-Second arc-shaped cathode dust collection plate;

[0039] 14 - Anode conductor; 15 - First cathode conductor;

[0040] 16-Second cathode wire; 21-First charge measuring device;

[0041] 22-Second charge measurement device; 3-Power supply;

[0042] 41-Support rod; 42-Support plate;

[0043] 51-Payout spool; 52-Tension wheel;

[0044] 53-First guide wheel; 54-Second guide wheel;

[0045] 55 - take-up spool; 6 - thread. Detailed Implementation

[0046] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are only some embodiments of this utility model, not all embodiments, and are only used to illustrate this utility model, and should not be regarded as limiting the scope of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 This utility model provides a yarn cleanliness evaluation system, including: a charged dust collection unit 1;

[0049] The charged dust collection unit 1 includes a corona wire 11 and a cathode dust collection plate; the cathode dust collection plate includes a first arc-shaped cathode dust collection plate 12 and a second arc-shaped cathode dust collection plate 13 symmetrically distributed; the first arc-shaped cathode dust collection plate 12 and the second arc-shaped cathode dust collection plate 13 form a tubular cavity; the corona wire 11 is located at the axial center of the tubular cavity.

[0050] The yarn cleanliness evaluation system provided by this utility model includes a corona wire and two symmetrical cathode dust collection plates. It ionizes the local air through the corona effect. When the yarn passes through the charged dust collection unit 1, the particles on the yarn surface and in the air become charged and are adsorbed by the two symmetrical cathode dust collection plates under the action of the electric field. The difference in the amount of charge adsorbed by the two cathode dust collection plates eliminates the influence of the amount of charge of particles in the air and only represents the amount of charge of particles adsorbed on the yarn surface. This amount of charge is proportional to the number of adsorbed particles. Therefore, the cleanliness of the yarn surface can be quantitatively evaluated by the difference in charge, and the yarn surface can be cleaned at the same time.

[0051] The yarn cleanliness evaluation system provided by this utility model can calculate the cumulative charge, thereby realizing continuous evaluation of the entire roll of yarn.

[0052] The yarn cleanliness evaluation system provided by this utility model has a simple structure and is easy to integrate into the back end of drawing or annealing equipment, enabling continuous quantitative evaluation of the cleanliness of yarn surfaces.

[0053] In the charged dust collection unit 1, the surrounding gas molecules are ionized under the action of a high-voltage electric field through the corona effect, generating a large number of free electrons and positive ions. The free electrons are immediately attracted by the corona wire and lose their charge, while the positive ions move towards the cathode dust collection plate under the action of the electric field, filling the space between the two electrodes. When the particles adsorbed on the surface of the wire and the particles in the air enter this area, the positive ions meet the particles and attach to them, making the particles positively charged. The particles adsorbed on the surface of the wire will detach from the wire under the action of the electric field force and be adsorbed by one of the cathode dust collection plates. The particles in the air near the cathode dust collection plate will also be adsorbed by the cathode dust collection plate under the action of the electric field force, thereby achieving wire cleaning. The particles in the air near the other cathode dust collection plate will be adsorbed by the cathode dust collection plate under the action of the electric field force.

[0054] See Figure 3 For example, in the charged dust collection unit 1, the particles adsorbed on the surface of the wire 6 near the second arc-shaped cathode dust collection plate 13 will detach from the wire 6 under the action of the electric field and be adsorbed by the second arc-shaped cathode dust collection plate 13. Particles in the air near the second arc-shaped cathode dust collection plate 13 will also be adsorbed by the second arc-shaped cathode dust collection plate 13 under the action of the electric field. Particles in the air near the first arc-shaped cathode dust collection plate 12 will be adsorbed by the first arc-shaped cathode dust collection plate 12 under the action of the electric field. The amount of charge adsorbed on the surface of the wire 6 is Q. w Q w =Q2-Q1, where Q2 is the charge adsorbed by the second arc-shaped cathode dust collection plate 13, and Q1 is the charge adsorbed by the first arc-shaped cathode dust collection plate 12; the charge is proportional to the number of particles, Q w The larger the value, the more particles the thread adsorbs, and the worse the cleanliness, thus enabling quantitative detection of the cleanliness of the thread surface.

[0055] In some implementations, the yarn cleanliness evaluation system also includes a measurement unit;

[0056] The measuring unit includes a first charge measuring device 21 and a second charge measuring device 22; the first charge measuring device 21 is connected to the first arc-shaped cathode dust collection plate 12; and the second charge measuring device 22 is connected to the second arc-shaped cathode dust collection plate 13.

[0057] See Figure 6 The charge measurement devices (first charge measurement device 21 and second charge measurement device 22) include a high-impedance ammeter, an analog-to-digital converter, and an oscilloscope. The high-impedance ammeter measures minute dust collection currents; the analog-to-digital converter integrates the measured current signal to obtain the charge amount; and the oscilloscope processes the charge data. The first charge measurement device 21 and the second charge measurement device 22 can respectively obtain the charge adsorbed on the first arc-shaped cathode dust collection plate 12 and the second arc-shaped cathode dust collection plate 13.

[0058] In some embodiments, the diameter of the corona wire 11 is 2 to 3 mm; for example, the diameter of the corona wire 11 can be 2 mm, 2.5 mm, 3 mm, etc.

[0059] In some embodiments, the length of the corona wire 11 is 150 to 450 mm; for example, the length of the corona wire 11 is 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm, etc.; the length of the corona wire 11 is greater than or equal to the length of the cathode dust collection plate.

[0060] In some implementations, the corona wire 11 is made of stainless steel.

[0061] In some embodiments, the cross-sectional shape of the corona wire 11 includes a circle.

[0062] In some embodiments, the tubular cavity is circular; the inner radius of the tubular cavity is 1 to 2 cm; for example, the inner radius of the tubular cavity is 1 cm, 1.5 cm, 2 cm, etc.

[0063] In some embodiments, the length of the cathode dust collection plate is 100-300mm; that is, the lengths of the first arc-shaped cathode dust collection plate 12 and the second arc-shaped cathode dust collection plate 13 are equal, both being 100-300mm; for example, the lengths of the first arc-shaped cathode dust collection plate 12 and the second arc-shaped cathode dust collection plate 13 are 100mm, 200mm, 300mm, etc.

[0064] In some embodiments, the curvature of the first arc-shaped cathode dust collection plate 12 is 150° to 170°; for example, the curvature of the first arc-shaped cathode dust collection plate 12 is 150°, 160°, 170°, etc.; the curvature of the first arc-shaped cathode dust collection plate 12 is the same as the curvature of the second arc-shaped cathode dust collection plate 13.

[0065] In some embodiments, the first arc-shaped cathode dust collection plate 12 and the second arc-shaped cathode dust collection plate 13 are made of stainless steel or aluminum alloy; for example, the first arc-shaped cathode dust collection plate 12 and the second arc-shaped cathode dust collection plate 13 are both made of stainless steel or both are made of aluminum alloy.

[0066] In some embodiments, the thickness of the first arc-shaped cathode dust collection plate 12 and the second arc-shaped cathode dust collection plate 13 is 1 to 3 mm; for example, the thickness of the first arc-shaped cathode dust collection plate 12 and the second arc-shaped cathode dust collection plate 13 is 1 mm, 2 mm, 3 mm, etc.

[0067] In some embodiments, the silk thread cleanliness evaluation system also includes a power supply 3; the corona wire 11 is connected to the positive terminal of the power supply 3, and the tubular cathode plate is connected to the negative terminal of the power supply 3; that is, the corona wire 11 is connected to the positive terminal of the power supply 3, the first arc-shaped cathode dust collection plate 12 is connected to the negative terminal of the power supply 3, and the second arc-shaped cathode dust collection plate 13 is connected to the negative terminal of the power supply 3.

[0068] See Figure 7 In some implementations, power supply 3 includes a DC power supply.

[0069] The input voltage at the power supply input terminal is 12-24V, ensuring personnel safety; then the DC / DC boost module outputs high-voltage DC power, specifically by generating low-voltage pulses through high-frequency oscillation, then boosting the voltage to a predetermined value through a pulse transformer, and finally obtaining high-voltage DC power through pulse rectification to supply the charged dust collection unit 1.

[0070] See Figure 4 and Figure 5 In some embodiments, the corona wire 11 is connected to the positive terminal of the power supply 3 via the anode wire 14, the first arc-shaped cathode dust collection plate 12 is connected to the negative terminal of the power supply 3 via the first cathode wire 15, and the second arc-shaped cathode dust collection plate 13 is connected to the negative terminal of the power supply 3 via the second cathode wire 16.

[0071] In some embodiments, the first charge measuring device 21 is disposed between the first arc-shaped cathode dust collection plate 12 and the negative terminal of the power supply 3;

[0072] The second charge measurement device 22 is disposed between the second arc-shaped cathode dust collection plate 13 and the negative terminal of the power supply 3.

[0073] Two charge measurement devices are connected in series between the negative terminal of power supply 3 and the first arc-shaped cathode dust collection plate 12 and the second arc-shaped cathode dust collection plate 13, respectively, and are grounded.

[0074] In some embodiments, the wire cleanliness evaluation system further includes a support unit, which includes a support rod 41 and a support plate 42; the support rod 41 is used to support the corona wire 11; the support plate 42 is used to support the first arc-shaped cathode dust collection plate 12 and the second arc-shaped cathode dust collection plate 13.

[0075] In some embodiments, the support rod 41 is located at both ends of the corona wire 11.

[0076] In some embodiments, the support rod 41 is provided with a through hole; the wire passes through the through hole of the support rod 41 located at both ends of the corona wire 11.

[0077] In some embodiments, the outer walls of the first arc-shaped cathode dust collection plate 12 and the second arc-shaped cathode dust collection plate 13 are provided with protrusions, which cooperate with the grooves of the support plate 42.

[0078] Both arc-shaped cathode dust collection plates have protrusions that mate with the support plate for easy disassembly. The structure of the corona wire and cathode dust collection plates in this wire cleanliness evaluation system facilitates disassembly and cleaning.

[0079] In some embodiments, the anode conductor 14 is located inside the support rod 41; the first cathode conductor 15 and the second cathode conductor 16 are located inside the support plate 42.

[0080] In some embodiments, the yarn cleanliness evaluation system further includes a moving unit; the moving unit includes a pay-off shaft 51, a tension wheel 52, a first guide wheel 53, a second guide wheel 54 and a take-up shaft 55 arranged in sequence; a charged dust collection unit 1 is disposed between the first guide wheel 53 and the second guide wheel 54; a tension rod is provided on the tension wheel 52.

[0081] In some embodiments, the wire includes a metal wire; for example, a bonding wire.

[0082] The operation mode of the yarn cleanliness evaluation system is as follows:

[0083] 1. Wire Installation and Operation: The wire is drawn from the pay-off shaft 51, passes sequentially through the tension wheel 52 and the first guide wheel 53, passes through the charged dust collection unit 1, and passes parallel to the corona wire 11 through the through hole of the support rod 41. The center distance between the wire and the corona wire is 0.11–0.45 cm. Near the second arc-shaped cathode dust collection plate 13, the wire passes through the second guide wheel 54 and is attached to the take-up shaft 55. When the DC power is turned on, the pay-off shaft 51 and the take-up shaft 55 rotate synchronously under the drive of the servo motor. Simultaneously, the take-up shaft 55 also reciprocates, realizing the wire pay-off and take-up. The wire movement speed is 0.1–5 m / s, and the wire tension is 1–20 gf.

[0084] 2. Charged Dust Collection: While the wire is running, a DC power supply is turned on. In the charged dust collection unit 1, the corona wire 11 discharges, generating a corona effect. This causes the surrounding gas molecules to ionize under the action of a high-voltage electric field, producing a large number of free electrons and positive ions. The free electrons are immediately attracted by the corona wire 11 and lose their charge. The positive ions move towards the cathode dust collection plate under the action of the electric field, filling the space between the two electrodes. When the particles adsorbed on the surface of the wire and the particles in the air enter this area, the positive ions meet the particles and attach to them, making the particles positively charged. The particles adsorbed on the surface of the wire will detach from the wire under the action of the electric field and be adsorbed by the second arc-shaped cathode dust collection plate 13. The particles in the air near the second arc-shaped cathode dust collection plate 13 will also be adsorbed by the second arc-shaped cathode dust collection plate 13 under the action of the electric field. The particles in the air near the first arc-shaped cathode dust collection plate 12 will be adsorbed by the first arc-shaped cathode dust collection plate 12 under the action of the electric field.

[0085] 3. Measurement and Evaluation: Charged particles are adsorbed onto the first arc-shaped cathode dust collection plate 12 and the second arc-shaped cathode dust collection plate 13, forming a dust collection current. The charges Q1 and Q2 adsorbed on the first arc-shaped cathode dust collection plate 12 and the second arc-shaped cathode dust collection plate 13 are counted by the first charge measurement device 21 and the second charge measurement device 22, respectively. Since the two dust collection plates are symmetrically arranged with respect to the corona wire, the difference between the adsorbed charges on the two dust collection plates eliminates the influence of the adsorbed charge of particles in the air. The amount of adsorbed charge Q on the surface of the wire is... w =Q2-Q1, Q w The larger the value, the more particles the thread adsorbs, and the worse the cleanliness.

[0086] Although the present invention has been illustrated and described with specific embodiments, it should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it; those skilled in the art should understand that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein, without departing from the spirit and scope of the present invention; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention; therefore, this means that all such substitutions and modifications that fall within the scope of the present invention are included in the appended claims.

Claims

1. A system for evaluating the cleanliness of yarn, characterized in that, The application relates to a yarn cleanness evaluation system. The yarn cleanness evaluation system comprises a charging dust collection unit; the charging dust collection unit comprises a corona wire and a cathode dust collection plate; the cathode dust collection plate comprises symmetrically distributed first and second arc-shaped cathode dust collection plates; the first and second arc-shaped cathode dust collection plates form a tubular cavity; and the corona wire is located at the axial center of the tubular cavity. The yarn cleanness evaluation system further comprises a measuring unit.

2. The filament cleanliness evaluation system of claim 1, wherein The measuring unit comprises first and second charge amount measuring devices; the first charge amount measuring device is connected to the first arc-shaped cathode dust collection plate; and the second charge amount measuring device is connected to the second arc-shaped cathode dust collection plate. The diameter of the corona wire is 2-3 mm.

3. The filament cleanliness evaluation system of claim 1, wherein And / or, the length of the corona wire is 150-450 mm. The inner circular radius of the tubular cavity is 1-2 cm.

4. The filament cleanliness evaluation system of claim 1, wherein And / or, the length of the cathode dust collection plate is 100-300 mm. The arc of the first arc-shaped cathode dust collection plate is 150-170 degrees.

5. The filament cleanliness evaluation system of claim 1, wherein The arc of the first arc-shaped cathode dust collection plate is the same as that of the second arc-shaped cathode dust collection plate. The yarn cleanness evaluation system further comprises a power supply; the corona wire is connected to the positive pole of the power supply; and the cathode dust collection plate is connected to the negative pole of the power supply.

6. The filament cleanliness evaluation system of claim 2, wherein The first charge amount measuring device is arranged between the first arc-shaped cathode dust collection plate and the negative pole of the power supply.

7. The filament cleanliness evaluation system of claim 6, wherein And / or, the second charge amount measuring device is arranged between the second arc-shaped cathode dust collection plate and the negative pole of the power supply. The yarn cleanness evaluation system further comprises a supporting unit; the supporting unit comprises a supporting rod and a supporting plate; the supporting rod is used for supporting the corona wire; and the supporting plate is used for supporting the first and second arc-shaped cathode dust collection plates.

8. The filament cleanliness evaluation system of claim 1, wherein The supporting rod is located at both ends of the corona wire.

9. The filament cleanliness evaluation system of claim 8, wherein And / or, the outer wall of the first and second arc-shaped cathode dust collection plates is provided with protrusions; the protrusions are matched with grooves in the supporting plate. The yarn cleanness evaluation system further comprises a moving unit; the moving unit comprises, in sequence, a pay-off shaft, a tension wheel, a first guide wheel, a second guide wheel and a take-up shaft; and the charging dust collection unit is arranged between the first and second guide wheels.

10. The filament cleanliness evaluation system of claim 1, wherein ​

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