A steel cord metering system and fault judgment method

Abstract

The present invention discloses a steel cord metering system and a fault judgment method, the metering system comprises a pay-off rotating guide wheel, a torsion detection machine, a secondary metering wheel, a diameter detector, a first positioning guide wheel, a second positioning guide wheel, a main metering wheel and a take-up rotating guide wheel, the secondary metering wheel is provided with a secondary metering electric eye for detecting the number of turns of the secondary metering wheel, the main metering wheel is provided with a first main metering electric eye and a second main metering electric eye for detecting the number of turns of the main metering wheel, the torsion detection machine is placed above the pay-off rotating guide wheel, so that the steel cord after pay-off has a vertical tension, and then passes through the secondary metering wheel for metering, the first positioning guide wheel is located above the secondary metering wheel, and the diameter detector is installed between the secondary metering wheel and the first positioning guide wheel. The present invention adopts a three-metering system in which two electric eyes are installed on the main metering wheel and one electric eye is installed on the secondary metering wheel, so as to reduce the number of metering difference stops, reduce cord loss and rewinding labor and other losses.

Description

Technical Field

[0001] The invention relates to the technical field of steel cord production, and in particular to a steel cord metering system and a fault judgment method. Background Art

[0002] In the existing steel cord production, a counter is usually used to control the meter length of the steel cord. When there is an error or failure in the counter, the meter length of the steel cord will be out of control. If the length difference between each round of steel cord is too large, the take-up reel will be scrapped, which will cause waste of cord and increase the labor cost of rewinding. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies of the prior art, the present invention provides a steel cord metering system, which solves the problems of frequent stops due to metering errors and cord waste. Based on this, the present invention also provides a fault judgment method.

[0004] Technical solution: The steel cord metering system described in the present invention includes a pay-off rotating guide wheel, a torsion detection machine, a secondary metering wheel, a diameter detector, a first positioning guide wheel, a second positioning guide wheel, a main metering wheel and a take-up rotating guide wheel. The secondary metering wheel is equipped with a secondary metering electric eye for detecting the number of turns of the secondary metering wheel, and the main metering wheel is equipped with a first main metering electric eye and a second main metering electric eye for detecting the number of turns of the main metering wheel. The torsion detection machine is placed above the pay-off rotating guide wheel so that the steel cord has a vertical tension after the pay-off, and then passes through the secondary metering wheel for metering. The first positioning guide wheel is located above the secondary metering wheel, and the diameter detector is installed between the secondary metering wheel and the first positioning guide wheel. The second positioning guide wheel and the first positioning guide wheel are installed horizontally, and the take-up guide wheel is set according to the wire running direction of the steel cord.

[0005] Further, including:

[0006] The steel cord outlet side of the auxiliary meter wheel is located directly below the wire inlet side of the first positioning guide wheel, so that the steel cord between the steel cord outlet of the auxiliary meter wheel and the wire inlet of the first positioning guide wheel is in a vertically stretched state.

[0007] Further, including:

[0008] Two auxiliary transparent grooves are symmetrically provided on the surface of the auxiliary meter wheel, and the two auxiliary transparent grooves are preset at the two ends of a diameter of the circle where the auxiliary meter wheel is located. When the auxiliary meter wheel drives the auxiliary meter electric eye to rotate into the auxiliary transparent groove, a low voltage is output. When the auxiliary meter electric eye is placed at other positions of the auxiliary meter wheel, a high voltage is output.

[0009] Further, including:

[0010] Two main transparent grooves are symmetrically provided on the surface of the main meter wheel, and the two main transparent grooves are preset at the two ends of a diameter of the circle where the main meter wheel is located. When the main meter wheel drives the first main meter electric eye and / or the second main meter electric eye to rotate into the main transparent grooves, a low voltage is output. When the first main meter electric eye and / or the second main meter electric eye are placed at other positions of the main meter wheel, a high voltage is output.

[0011] Further, including:

[0012] The system also includes a third positioning guide wheel, which is installed between the second positioning guide wheel and the main meter wheel, set at a certain distance along the wire output direction of the second positioning guide wheel and close to the main meter wheel to ensure that there is no curling at the wire inlet of the main meter wheel.

[0013] A fault judgment method implemented according to the above steel cord metering system comprises the following steps:

[0014] S1 calculates the meter counts corresponding to the auxiliary meter meter eye, the first main meter meter eye and the second main meter meter eye according to the real-time detection values ​​corresponding to the three electric eyes, and records them as L fu , L zhu1 and L zhu2 ;

[0015] S2 calculates the difference D1 = |L zhu1 -L fu |; Difference D2 = |L zhu2 -L fu |, difference D3 = |L zhu1 -L zhu2 |, set the alarm difference and normal value range of D1, D2 and D3;

[0016] S3 If D2 is within the normal range, and D1 and / or D3 are not within the normal range, the system does not stop, but switches the metering to the second main metering electric eye, and alarms at the same time, judging that the first main metering electric eye is faulty; otherwise:

[0017] If D1 is within the normal range, and D2 and / or D3 are not within the normal range, the system will not stop, but will alarm, and it is determined that the second main meter electric eye is faulty; otherwise:

[0018] If D3 is within the normal range, and D1 and / or D2 are not within the normal range, the system will not stop, but will alarm and determine that the auxiliary meter electric eye is faulty; otherwise:

[0019] If D1, D2 and D3 all exceed the normal value range, the system will stop and alarm at the same time, and the system will be judged as faulty.

[0020] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. The present invention adopts a three-metering system with two electric eyes installed on the main meter wheel and one electric eye installed on the auxiliary meter wheel, which reduces the number of metering difference stops, reduces cord loss and rewinding labor losses; 2. The present invention reserves transparent grooves on the main and auxiliary meter wheels, and determines a count through the correspondence between the transparent grooves and the electric eyes, thereby achieving accurate metering; 3. The positional relationship between the guide wheels of the present invention makes the overall steel cord metering more accurate and reduces the waste of steel cord. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the steel cord metering system of the present invention;

[0022] Figure 2 It is a flow chart of the fault judgment method of the present invention. DETAILED DESCRIPTION

[0023] like Figure 1 As shown, the steel cord metering system of the present invention comprises a pay-off rotating guide wheel 1, a torsion detection machine 2, an auxiliary metering wheel 3, a diameter detector 4, a first positioning guide wheel 5, a second positioning guide wheel 6, a main metering wheel 8 and a take-up rotating guide wheel 9, wherein the auxiliary metering wheel 3 is provided with an auxiliary metering electric eye 10 for detecting the number of turns of the auxiliary metering wheel, and the main metering wheel 8 is provided with a first main metering electric eye 11 and a second main metering electric eye 22 for detecting the number of turns of the main metering wheel, the torsion detection machine 2 is placed above the pay-off rotating guide wheel 1, so that the steel cord after pay-off has a vertical tension, and then passes through the auxiliary metering wheel 3 for metering, the first positioning guide wheel 5 is located above the auxiliary metering wheel 3, the diameter detector 4 is installed between the auxiliary metering wheel 3 and the first positioning guide wheel 5, the second positioning guide wheel 6 and the first positioning guide wheel 5 are installed horizontally, and the take-up guide wheel 9 is arranged according to the wire running direction of the steel cord, that is, the steel cord metering system adopts the main metering meter and the auxiliary metering meter to ensure accurate metering. The main meter measures the number of main meter wheel laps detected by the main meter electric eye, and the auxiliary meter wheel measures the number of auxiliary meter wheel laps detected by the auxiliary meter electric eye.

[0024] Specifically, the wire-out side of the auxiliary meter wheel 3 is located directly below the wire-in side of the first positioning guide wheel 5 , so that the steel cord of this section is in a vertically stretched state.

[0025] Two crescent-shaped secondary transparent grooves are symmetrically provided on the surface of the secondary meter wheel 3, and the two secondary transparent grooves are preset at the two ends of a diameter of the circle where the secondary meter wheel is located. When the secondary meter wheel 3 drives the secondary meter electric eye 10 to rotate into the secondary transparent groove, a low voltage is output, and when the secondary meter electric eye 10 is placed at other positions of the secondary meter wheel 3, a high voltage is output. Two main transparent grooves 81 are symmetrically provided on the surface of the main meter wheel 8, and the two main transparent grooves 81 are preset at the two ends of a diameter of the circle where the main meter wheel is located. When the main meter wheel 8 drives the first main meter electric eye 11 and / or the second main meter electric eye 12 to rotate into the main transparent groove 81, a low voltage is output, and when the first main meter electric eye 11 and / or the second main meter electric eye 12 are placed at other positions of the main meter wheel 8, a high voltage is output. The electric eye counts once when it switches from low voltage to high voltage; the cord first passes through the auxiliary meter wheel, and the auxiliary meter electric eye counts the meter; then it passes through the main meter wheel, and the first main meter electric eye and the second main meter electric eye count the meter respectively.

[0026] In one embodiment of the present invention, the system also includes a third positioning guide wheel 7, which is installed between the second positioning guide wheel 6 and the main meter wheel 8, is set at a certain distance along the wire output direction of the second positioning guide wheel 6, and is close to the main meter wheel 8, that is, the third positioning guide wheel is closer to the main meter wheel than the second positioning guide wheel. This structure ensures that there is no curling at the wire inlet of the main meter wheel.

[0027] like Figure 2 As shown, a fault judgment method implemented according to the above steel cord metering system comprises the following steps:

[0028] S1 calculates the meter counts corresponding to the auxiliary meter meter eye, the first main meter meter eye and the second main meter meter eye according to the real-time detection values ​​corresponding to the three electric eyes, and records them as L fu , L zhu1 and L zhu2 , the electric eye switches from low voltage to high voltage and counts once.

[0029] S2 calculates the difference D1 = |L zhu1 -L fu |; Difference D2 = |L zhu2 -L fu |, difference D3 = |L zhu1 -L zhu2 |, set the alarm difference and normal value range of D1, D2 and D3. In one embodiment of the present invention, the normal values ​​of difference 1, difference 2 and difference 3 vary between 0 and 1 meter, and the alarm difference is generally set to 5 meters.

[0030] S3 If D2 is within the normal range, and one or both of D1 and D3 are not within the normal range, the system will not stop, but switch the metering to the second main metering electric eye, and alarm at the same time: difference alarm, judging that the first main metering electric eye is faulty; the alarm here indicates that there is an electric eye fault, and the difference 2 does not exceed the set value, indicating that the second main metering electric eye and the auxiliary metering electric eye are normal, thus judging that the first main metering electric eye is faulty;

[0031] If D1 is within the normal range, and one or both of D2 and D3 are not within the normal range, the system will not stop, but will alarm at the same time, and it is determined that the second main meter electric eye is faulty. Here, the difference 1 does not exceed the set value, indicating that the first main meter electric eye and the auxiliary meter electric eye are normal, thus determining that the second main meter electric eye is faulty;

[0032] If D3 is within the normal range, and one or both of D1 and D2 are not within the normal range, the system will not stop, but will give an alarm, and it is determined that the auxiliary meter electric eye is faulty; here, the alarm indicates that there is an electric eye failure, and the difference 3 does not exceed the set value, indicating that the first main meter electric eye and the second main meter electric eye are normal, thus determining that the auxiliary meter electric eye is faulty;

[0033] If D1, D2 and D3 all exceed the normal value range, the system stops and alarms at the same time, judging that the system fails. If all three difference alarms are sounded, it means that at least two metering electric eyes are faulty and the system cannot make a judgment. The three-electric-eye meter of the present invention can be compared to determine which electric eye has a problem. Under normal circumstances, when the three metering electric eyes fail, only one of them is damaged, and the situation where two electric eyes are damaged at the same time almost does not exist. Therefore, three electric eyes are sufficient for metering, and there is no need to increase the cost of adding electric eyes. It can further improve efficiency and save costs.

[0034] If the above system does not stop alarming and the machine is fully unloaded, it must be repaired by maintenance personnel and then reset with a password and confirmed by the production foreman before it can be started. The above fault judgment method reduces the machine maintenance downtime and reduces production losses.

Claims

1. A steel cord metering system, characterized in that: The invention comprises a pay-off rotating guide wheel (1), a torsion detection machine (2), a secondary meter wheel (3), a diameter detector (4), a first positioning guide wheel (5), a second positioning guide wheel (6), a main meter wheel (8) and a take-up rotating guide wheel (9), wherein the secondary meter wheel (3) is provided with a secondary meter electric eye (10) for detecting the number of turns of the secondary meter wheel, the main meter wheel (8) is provided with a first main meter electric eye (11) and a second main meter electric eye (12) for detecting the number of turns of the main meter wheel, and the torsion detection machine (2) is placed above the pay-off rotating guide wheel (1), so that the steel cord after pay-off has a vertical tension, and then passes through the auxiliary meter wheel (3) for metering, the first positioning guide wheel (5) is located above the auxiliary meter wheel (3), the diameter detector (4) is installed between the auxiliary meter wheel (3) and the first positioning guide wheel (5), the second positioning guide wheel (6) and the first positioning guide wheel (5) are installed horizontally, and the take-up rotating guide wheel (9) is set according to the wire running direction of the steel cord; The surface of the auxiliary meter wheel (3) is symmetrically provided with two auxiliary transparent grooves, and the two auxiliary transparent grooves are preset at the two ends of a diameter of the circle where the auxiliary meter wheel is located. When the auxiliary meter wheel (3) drives the auxiliary meter electric eye (10) to rotate into the auxiliary transparent groove, it outputs a low voltage. When the auxiliary meter electric eye (10) is placed at other positions of the auxiliary meter wheel (3), it outputs a high voltage. The surface of the main meter wheel (8) is symmetrically provided with two main transparent grooves (81), and the two main transparent grooves (81) are preset at the two ends of a diameter of the circle where the main meter wheel is located. The main meter wheel (8) When the first main meter-counting electric eye (11) and / or the second main meter-counting electric eye (12) are driven to rotate into the main transparent groove (81), a low voltage is output; when the first main meter-counting electric eye (11) and / or the second main meter-counting electric eye (12) are placed at other positions of the main meter-counting wheel (8), a high voltage is output; the system also includes a third positioning guide wheel (7), which is installed between the second positioning guide wheel (6) and the main meter-counting wheel (8), is arranged at a certain distance along the wire output direction of the second positioning guide wheel (6), and is close to the main meter-counting wheel to ensure that there is no curling at the wire inlet of the main meter-counting wheel.

2. The steel cord metering system according to claim 1, characterized in that: The steel cord outlet side of the auxiliary meter wheel (3) is located directly below the wire inlet side of the first positioning guide wheel (5), so that the steel cord between the steel cord outlet of the auxiliary meter wheel (3) and the wire inlet of the first positioning guide wheel (5) is in a vertically stretched state.

3. A fault judgment method implemented by the steel cord metering system according to any one of claims 1-2, characterized in that: The method comprises the following steps: S1 calculates the meter counts corresponding to the auxiliary meter metering electric eye (10), the first main meter metering electric eye (11) and the second main meter metering electric eye (12) according to the real-time detection values ​​corresponding to the three electric eyes, which are respectively recorded as L fu , L zhu1 and L zhu2 ; S2 calculates the difference 1D1 = |L zhu1 -L fu |; Difference 2D2 = |L zhu2 -L fu |, difference 3D3 = |L zhu1 -L zhu2 |, set the alarm difference and normal value range of D1, D2 and D3; S3 If D2 is within the normal range, and D1 and / or D3 are not within the normal range, the system does not stop, but switches the metering to the second main metering electric eye (12), and alarms at the same time, judging that the first main metering electric eye (11) is faulty; otherwise: If D1 is within the normal range, and D2 and / or D3 are not within the normal range, the system does not stop, but alarms at the same time, and determines that the second main meter electric eye (12) is faulty; otherwise: If D3 is within the normal range, and D1 and / or D2 are not within the normal range, the system does not stop, but alarms and determines that the auxiliary meter electric eye is faulty (10); otherwise: If D1, D2 and D3 all exceed the normal value range, the system stops and an alarm is sounded, indicating that the system is faulty.

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