Method for determining unwinding length of steel wire rope

Abstract

According to the steel wire rope unwinding length determining method, the cross section diameter of the steel wire rope is calculated, then the length of each layer of steel wire rope on a winch after the steel wire rope winds the winch by one circle is determined, and therefore the total length of each layer of steel wire rope on the winch can be calculated; the overall length of the steel wire rope can be calculated through the total length of the steel wire rope of each layer, calculation is conducted layer by layer, the calculation result is clear, omission is not prone to occurring, the remaining length of the steel wire rope is determined by calculating the total number of turns and the number of released turns of the steel wire rope, and therefore the overall length of the steel wire rope is calculated. The released length of the steel wire rope can be determined by subtracting the remaining length from the total length, the calculation process is simple, the calculation result is clear, winding and unwinding of the steel wire rope can be controlled conveniently, and accidents of the winch caused when the steel wire rope is released beyond the preset range are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of winch wire rope control, and in particular to a method for determining the length of a wire rope being released. Background Art

[0002] A winch is a small and light lifting equipment that lifts or pulls heavy objects by winding a wire rope or chain around a drum. Due to its simple operation and strong load capacity, the winch is widely used in marine engineering, ships, coal mines, docks, mines, roads and bridges and other fields.

[0003] A deep-sea winch system is disclosed in a patent document with Chinese patent application number 202211189990.9 and publication date 2023.04.04. The winch system controls the retraction and release of the cable through a cable-containing winch.

[0004] As in the prior art of the document, the cable retraction and release is not well controlled according to the length of the cable, which may easily cause the cable to exceed the safe range when being released, resulting in accidents. Summary of the invention

[0005] The present invention provides a method for determining the length of a steel wire rope being released, which can clearly calculate the length of the steel wire rope being released, thereby facilitating control of the release and retraction of the steel wire rope and avoiding accidents of a winch caused by releasing the steel wire rope beyond a preset range.

[0006] To achieve the above object, the technical solution of the present invention is: a method for determining the length of a steel wire rope, the specific steps comprising: (4) Calculate the total length D of the wire rope based on the total length Z of each layer of wire rope.

[0007] (5) Calculate the total length D of the first M-1 layers of wire rope M-1 .

[0008] (6) According to the total length Z of the outermost layer M M and the total length D of the first M-1 layer of wire rope M-1 Calculate the total length of the wire rope D=Z M +D M-1 .

[0009] (7) Calculate the total number of turns S of the wire rope.

[0010] (8) Calculate the number of turns F of the wire rope to be paid out.

[0011] (9) Determine the layer number B of the wire rope based on the number of turns F of the wire rope that has been paid out.

[0012] (10) Calculate the remaining total length C of the wire rope based on the layer number B that the wire rope is currently in.

[0013] (11) Determine the length H of the released wire rope based on the remaining total length C of the wire rope.

[0014] The above method calculates the cross-sectional diameter of the wire rope, and then determines the length of each layer of wire rope on the winch after it is wrapped around the winch once, thereby calculating the total length of the wire rope of each layer on the winch, and the overall length of the wire rope can be calculated through the total length of the wire rope of each layer. Thus, by calculating layer by layer, the calculation result is clear and not prone to omissions, and the remaining length of the wire rope is determined by calculating the total number of turns and the number of turns released of the wire rope, thereby confirming the length of the wire rope released by subtracting the remaining length from the total length. The calculation process is simple and the calculation result is clear, thereby facilitating the control of the retraction and release of the wire rope, and avoiding accidents of the winch caused by releasing the wire rope beyond a preset range.

[0015] Furthermore, (1) calculate the cross-sectional diameter J of each layer of wire rope on the winch.

[0016] (2) Calculate the length L of one turn of each layer of wire rope based on the cross-sectional diameter J of each layer of wire rope.

[0017] (3) Calculate the total length Z of each layer of wire rope based on the length L of one turn of each layer of wire rope and the number of turns Q of each layer of wire rope.

[0018] (31) According to the number of windings Q of the outermost wire rope M Calculate the total length Z of the outermost layer M of the wire rope M .

[0019] Furthermore, the cross-sectional diameter J of each layer of steel wire rope in step (1) specifically includes: The cross-sectional diameter J1 of the first layer of steel wire rope is obtained by adding the cross-sectional diameter of the winch and the cross-sectional radius of the first layer of steel wire rope.

[0020] The second layer of steel wire ropes is wound between two adjacent steel wire ropes in the first layer, the center of the second layer of steel wire ropes is located between the two adjacent steel wire ropes in the first layer, and the cross-sectional circle of the second layer of steel wire ropes is tangent to the cross-sectional circle of the steel wire ropes in the first layer.

[0021] A hypotenuse is formed between the center of the second layer of steel wire ropes and the center of the first layer of steel wire ropes, and an opposite side is formed at the intersection of a vertical line between two adjacent steel wire ropes in the first layer and the center of the second layer of steel wire ropes. The hypotenuse and the opposite side are connected through adjacent sides to form a right triangle.

[0022] Determine the length of the opposite side, A, using the Pythagorean theorem.

[0023] Calculate the cross-sectional diameter J2 of the second layer of steel wire rope according to the length of the opposite side.

[0024] Similarly, the cross-sectional diameter J of the wire rope of the Nth layer is N Perform calculations.

[0025] The calculation formula for the cross-sectional diameter of the Nth layer of wire rope is: J N =J1+J2×(N-1)×A.

[0026] Among them, J1 is the cross-sectional diameter of the first layer of steel wire rope, and J2 is the cross-sectional diameter of the second layer of steel wire rope.

[0027] With the above arrangement, the center position of the second layer of steel wire ropes can be calculated by the right triangle formed between the second layer of steel wire ropes and the first layer of steel wire ropes, thereby the cross-sectional diameters of all layers of steel wire ropes can be calculated.

[0028] The calculation formula for the length L in step (2) is: L = π × J; the length of one turn of the wire rope of the Nth layer is L N =π×J N .

[0029] With the above settings, the length of one circle of wire rope can be calculated.

[0030] Furthermore, step (3) specifically includes the calculation formula of the total length Z of each layer of wire rope: Z=L×Q, and the Nth layer of wire rope is Z N =L N ×Q.

[0031] Step (31) specifically includes the total length Z of the outermost layer M of the wire rope M The calculation formula is: M =L M ×Q M .

[0032] Among them, L M It is the length of one circle of the outermost layer M of wire rope.

[0033] With the above settings, the total length of each layer of wire rope is calculated.

[0034] Furthermore, step (5) specifically includes the total length D of the first M-1 layers of steel wire ropes M-1 The calculation formula is: M-1 =Z N +Z N-1 .

[0035] Among them, Z N is the total length of the Nth layer of wire rope, the Mth layer is the outer layer of the Nth layer, then the Nth layer = the outermost layer M-1; Z N-1 It is the sum of the total lengths of all layers of wire ropes before the Nth layer.

[0036] With the above settings, the total length of the wire rope excluding the outermost layer is calculated.

[0037] Furthermore, step (7) specifically includes the total number of turns of the wire rope S = (M-1) × Q + Q M .

[0038] With the above settings, the total number of turns of the wire rope can be calculated.

[0039] Furthermore, step (8) specifically includes: (81) Number of wire rope turns F = (encoder current value - encoder initial value) ÷ value of winch rotation one circle.

[0040] The encoder is arranged on the drum of the winch. When the winch rotates, the encoder rotates along with the winch and records the number of rotations of the winch. When the winch rotates one circle, the encoder records a value once.

[0041] The above settings, through the setting of the encoder, make it possible to clearly record the number of winch rotations, thereby facilitating the calculation of the length of the wire rope. Furthermore, step (9) specifically includes: (91) The current layer number of the wire rope is B = (S-F) ÷ Q.

[0042] The total number of layers of the wire rope is the total number of turns of the wire rope S ÷ the number of turns of each layer of the wire rope Q, and (S-F) is the number of turns of the wire rope currently remaining.

[0043] (92) The result calculated in step (91) is rounded down, and the rounded result + 1 is the layer number B where the wire rope is currently located.

[0044] (93) Assume that the number of layers after rounding in step (92) is O, then B-1=O.

[0045] (94) Calculate the number of wire rope turns P = O × Q for the remaining layers except layer B.

[0046] (95) Calculate the number of wire rope turns Q for layer B B = (S - F) - P.

[0047] With the above settings, the number of layers where the wire rope is located is confirmed by calculation.

[0048] Furthermore, step (10) specifically includes: (101) Calculate the total length Z of the wire rope with layer number B B =Q B ×L B .

[0049] Among them, LB It is the length of one circle of wire rope with layer number B.

[0050] (102) Calculate the total length of the remaining layers of wire rope excluding layer B: D B-1 =Z O + Z O-1 .

[0051] Among them, Z O is the total length of the Oth layer of wire rope, Z O-1 It is the sum of the total lengths of all layers of wire ropes before the Oth layer.

[0052] (103) Calculate the remaining total length of the wire rope C = Z B + D B-1 .

[0053] Among them, Z B It is the total length of the wire rope in the layer B where the wire rope is currently located.

[0054] With the above settings, the remaining total length of the wire rope is confirmed by calculation.

[0055] Furthermore, step (11) specifically includes releasing the wire rope with a length H=DC.

[0056] With the above settings, the length of the wire rope released is confirmed by calculation. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a working principle diagram of the present invention.

[0058] Figure 2 It is a schematic diagram for calculating the cross-sectional diameter of the steel wire rope of the present invention. DETAILED DESCRIPTION

[0059] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] like Figure 1 As shown, a method for determining the length of a steel wire rope, the specific steps include: (1) Calculate the cross-sectional diameter J of each layer of wire rope on the winch.

[0061] (2) Calculate the length L of one turn of each layer of wire rope based on the cross-sectional diameter J of each layer of wire rope.

[0062] (3) Calculate the total length Z of each layer of wire rope based on the length L of one turn of each layer of wire rope and the number of turns Q of each layer of wire rope.

[0063] (31) According to the number of windings Q of the outermost wire rope MCalculate the total length Z of the outermost layer M of the wire rope M .

[0064] (4) Calculate the total length D of the wire rope.

[0065] (5) Calculate the total length D of the first M-1 layers of wire rope M-1 .

[0066] (6) According to the total length Z of the outermost layer M M and the total length D of the first M-1 layer of wire rope M-1 Calculate the total length of the wire rope D=Z M +D M-1 .

[0067] (7) Calculate the total number of turns S of the wire rope.

[0068] (8) Calculate the number of turns F of the wire rope to be paid out.

[0069] (9) Determine the layer number B of the wire rope based on the number of turns F of the wire rope that has been paid out.

[0070] (10) Calculate the remaining total length C of the wire rope based on the layer number B that the wire rope is currently in.

[0071] (11) Determine the length H of the released wire rope based on the remaining total length C of the wire rope.

[0072] The cross-sectional diameter J of each layer of steel wire rope in step (1) specifically includes: like Figure 2 As shown, the cross-sectional diameter J1 of the first layer of steel wire rope is obtained by adding the cross-sectional diameter of the winch 2 and the cross-sectional radius of the first layer of steel wire rope 1. In this embodiment, since the steel wire rope is wound on the winch, the cross section of the steel wire rope is located at the upper and lower ends of the cross section of the winch. Therefore, the cross-sectional radius of the steel wire rope is taken during calculation to calculate the cross-sectional diameter of the steel wire rope.

[0073] The second layer of steel wire ropes is wound between two adjacent steel wire ropes in the first layer, the center of the second layer of steel wire ropes is located between the two adjacent steel wire ropes in the first layer, and the cross-sectional circle of the second layer of steel wire ropes is tangent to the cross-sectional circle of the steel wire ropes in the first layer.

[0074] A hypotenuse α is formed between the center of the second layer of steel wire ropes and the center of the first layer of steel wire ropes, and an opposite side β is formed at the intersection of the vertical line between two adjacent steel wire ropes in the first layer and the center of the second layer of steel wire ropes. The hypotenuse and the opposite side are connected by the adjacent side θ to form a right triangle.

[0075] The length A of the opposite side is determined according to the Pythagorean theorem. In this embodiment, since the cross-sectional circle of the second layer of steel wire ropes is tangent to the cross-sectional circle of the steel wire ropes in the first layer, the hypotenuse of the right triangle is the cross-sectional radius of the first layer of steel wire ropes + the cross-sectional radius of the second layer of steel wire ropes; the adjacent side of the right triangle is the cross-sectional radius of the first layer of steel wire ropes. Therefore, according to the Pythagorean theorem, a²+b²=c², Calculate the cross-sectional diameter J2 of the second layer of wire rope based on the length of the opposite side.

[0076] Similarly, the cross-sectional diameter J of the wire rope of the Nth layer is N Perform calculations.

[0077] The calculation formula for the cross-sectional diameter of the Nth layer of wire rope is: J N =J1+J2×(N-1)×A.

[0078] Among them, J1 is the cross-sectional diameter of the first layer of steel wire rope, and J2 is the cross-sectional diameter of the second layer of steel wire rope.

[0079] The center position of the second layer of steel wire ropes can be calculated by the right triangle formed between the second layer of steel wire ropes and the first layer of steel wire ropes, thereby the cross-sectional diameters of all layers of steel wire ropes can be calculated.

[0080] The calculation formula for the length L in step (2) is: L = π × J; the length of one turn of the wire rope of the Nth layer is L N =π×J N .

[0081] Step (3) specifically includes the calculation formula of the total length Z of each layer of wire rope: Z = L × Q, the Nth layer of wire rope is Z N =L N ×Q.

[0082] Step (31) specifically includes the total length Z of the outermost layer M of the wire rope M The calculation formula is: M =L M ×Q M .

[0083] Among them, L M It is the length of one circle of the outermost layer M of wire rope.

[0084] Step (5) specifically includes the total length D of the first M-1 layers of wire rope M-1 The calculation formula is: M-1 =Z N +Z N-1 .

[0085] Among them, Z Nis the total length of the Nth layer of wire rope, the Mth layer is the outer layer of the Nth layer, then the Nth layer = the outermost layer M-1; Z N-1 It is the sum of the total lengths of all layers of wire ropes before the Nth layer.

[0086] In this embodiment, the sum of the total lengths is the total length of the steel wire ropes of the first layer + the total length of the steel wire ropes of the second layer ... + the total length of the steel wire ropes of the N-1th layer.

[0087] Step (7) specifically includes the total number of turns of the wire rope S = (M-1) × Q + Q M .

[0088] Step (8) specifically includes: (81) Number of wire rope turns F = (encoder current value - encoder initial value) ÷ value of winch rotation one circle.

[0089] The encoder is arranged on the drum of the winch. When the winch rotates, the encoder rotates along with the winch and records the number of rotations of the winch. When the winch rotates one circle, the encoder records a value once.

[0090] The encoder is set to clearly record the number of winch rotations, making it easier to calculate the length of the wire rope. Step (9) specifically includes: (91) The current layer number of the wire rope is B = (S-F) ÷ Q.

[0091] The total number of layers of the wire rope is the total number of turns of the wire rope S ÷ the number of turns of each layer of the wire rope Q, and (S-F) is the number of turns of the wire rope currently remaining.

[0092] (92) The result calculated in step (91) is rounded down, and the rounded result + 1 is the layer number B where the wire rope is currently located.

[0093] (93) Assume that the number of layers after rounding in step (92) is O, then B-1=O.

[0094] (94) Calculate the number of wire rope turns P = O × Q for the remaining layers except layer B.

[0095] (95) Calculate the number of wire rope turns Q for layer B B = (S - F) - P.

[0096] Step (10) specifically includes: (101) Calculate the total length Z of the wire rope with layer number B B =Q B ×L B .

[0097] Among them, L BIt is the length of one circle of wire rope with layer number B.

[0098] (102) Calculate the total length of the wire rope after removing the layer B: D B-1 =Z O + Z O-1 .

[0099] Among them, Z O is the total length of the Oth layer of wire rope, Z O-1 It is the sum of the total lengths of all layers of wire ropes before the Oth layer.

[0100] (103) Calculate the remaining total length of the wire rope C = Z B + D B-1 .

[0101] Among them, Z B It is the total length of the wire rope in the layer B where the wire rope is currently located.

[0102] Step (11) specifically includes releasing the wire rope length H=DC.

[0103] The beneficial effects of the present invention are as follows: by calculating the cross-sectional diameter of the wire rope, the length of each layer of wire rope on the winch after it is wound around the winch once is determined, thereby the total length of the wire rope of each layer on the winch can be calculated, and the overall length of the wire rope can be calculated by the total length of the wire rope of each layer, thereby calculating layer by layer, making the calculation result clear and not prone to omissions, and by calculating the total number of turns and the number of turns released of the wire rope, the remaining length of the wire rope is determined, thereby the length of the wire rope released can be confirmed by subtracting the remaining length from the total length, the calculation process is simple, and the calculation result is clear, thereby facilitating the control of the retraction and release of the wire rope, and avoiding accidents of the winch caused by releasing the wire rope beyond a preset range.

Claims

1. A method for determining the length of a steel wire rope, characterized in that: The specific steps include: (4) Calculate the total length D of the wire rope based on the total length Z of each layer of wire rope; (5) Calculate the total length D of the first M-1 layers of wire rope M-1 ; (6) According to the total length Z of the outermost layer M M and the total length D of the first M-1 layer of wire rope M-1 Calculate the total length of the wire rope D=Z M +D M-1 ; (7) Calculate the total number of turns S of the wire rope; (8) Calculate the number of turns F of the wire rope; (9) Determine the layer number B of the wire rope based on the number of turns F of the wire rope released; (10) Calculate the remaining total length C of the wire rope based on the layer number B that the wire rope is currently in; (11) Determine the length H of the released wire rope based on the remaining total length C of the wire rope.

2. A method for determining the length of a steel wire rope according to claim 1, characterized in that: Before step (4), the following steps are also included: (1) Calculate the cross-sectional diameter J of each layer of wire rope on the winch; (2) Calculate the length L of one turn of each layer of wire rope based on the cross-sectional diameter J of each layer of wire rope; (3) Calculate the total length Z of each layer of wire rope based on the length L of one turn of each layer of wire rope and the number of turns Q of each layer of wire rope; (31) According to the number of windings Q of the outermost wire rope M Calculate the total length Z of the outermost layer M of the wire rope M .

3. A method for determining the length of a steel wire rope according to claim 2, characterized in that: The cross-sectional diameter J of each layer of steel wire rope in step (1) specifically includes: The cross-sectional diameter J1 of the first layer of wire rope is obtained by adding the cross-sectional diameter of the winch and the cross-sectional radius of the first layer of wire rope; The second layer of steel wire ropes is wound between two adjacent steel wire ropes in the first layer, the center of the second layer of steel wire ropes is located between the two adjacent steel wire ropes in the first layer, and the cross-sectional circle of the steel wire ropes in the second layer is tangent to the cross-sectional circle of the steel wire ropes in the first layer; A hypotenuse is formed between the center of the second layer of steel ropes and the center of the first layer of steel ropes, and an opposite side is formed at the intersection of a vertical line between two adjacent steel ropes in the first layer and the center of the second layer of steel ropes, and the hypotenuse and the opposite side are connected through adjacent sides to form a right triangle; Determine the length of the opposite side A using the Pythagorean theorem; Calculate the cross-sectional diameter J2 of the second layer of wire rope according to the length of the opposite side; Similarly, the cross-sectional diameter J of the wire rope of the Nth layer is N Perform calculations; The calculation formula for the cross-sectional diameter of the Nth layer of wire rope is: I N =J1+J2×(N-1)×A; Wherein, J1 is the cross-sectional diameter of the first layer of steel wire rope, and J2 is the cross-sectional diameter of the second layer of steel wire rope; The calculation formula for the length L in step (2) is: L = π × J; the length of one circle of the wire rope of the Nth layer is L N =π×J N .

4. A method for determining the length of a steel wire rope according to claim 3, characterized in that: Step (3) specifically includes the calculation formula of the total length Z of each layer of wire rope: Z = L × Q, the Nth layer of wire rope is Z N =L N ×Q; Step (31) specifically includes the total length Z of the outermost layer M of the wire rope M The calculation formula is: M =L M ×Q M ; Among them, L M It is the length of one circle of the outermost layer M of wire rope.

5. A method for determining the length of a steel wire rope according to claim 4, characterized in that: Step (5) specifically includes the total length D of the first M-1 layers of wire rope M-1 The calculation formula is: M-1 =Z N +Z N-1 ; Among them, Z N is the total length of the Nth layer of wire rope, the Mth layer is the outer layer of the Nth layer, then the Nth layer = the outermost layer M-1; Z N-1 It is the sum of the total lengths of all layers of wire ropes before the Nth layer.

6. A method for determining the length of a steel wire rope according to claim 1, characterized in that: Step (7) specifically includes the total number of turns of the wire rope S = (M-1) × Q + Q M .

7. A method for determining the length of a steel wire rope according to claim 1, characterized in that: Step (8) specifically includes: (81) Number of wire rope turns F = (encoder current value - encoder initial value) ÷ value of winch rotation one circle; The encoder is arranged on the drum of the winch. When the winch rotates, the encoder rotates along with the winch and records the number of rotations of the winch. When the winch rotates one circle, the encoder records a value once.

8. A method for determining the length of a steel wire rope according to claim 7, characterized in that: Step (9) specifically includes: (91) The current layer number of the wire rope B = (S-F) ÷ Q; The total number of layers of the wire rope is the total number of turns of the wire rope S ÷ the number of turns of each layer of the wire rope Q, and (S-F) is the number of turns of the wire rope currently remaining; (92) The result calculated in step (91) is rounded down, and the rounded result + 1 is the layer number B where the steel wire rope is currently located; (93) Assume that the number of layers after rounding in step (92) is O, then B-1=O; (94) Calculate the number of wire rope turns P = O × Q in the remaining layers except layer B; (95) Calculate the number of wire rope turns Q for layer B B = (S - F) - P.

9. A method for determining the length of a steel wire rope according to claim 8, characterized in that: Step (10) specifically includes: (101) Calculate the total length Z of the wire rope with layer number B B =Q B ×L B ; Among them, L B is the length of one turn of wire rope with layer number B; (102) Calculate the total length of the remaining layers of wire rope excluding layer B: D B-1 =Z O + Z O-1 ; Among them, Z O is the total length of the Oth layer of wire rope, Z O-1 It is the sum of the total lengths of all layers of wire ropes before the Oth layer; (103) Calculate the remaining total length of the wire rope C = Z B + D B-1 ; Among them, Z B It is the total length of the wire rope in the layer B where the wire rope is currently located.

10. A method for determining the length of a steel wire rope according to claim 9, characterized in that: Step (11) specifically includes releasing the steel wire rope to a length H=DC of the steel wire rope.

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