Pre-drafting device and pre-drafting method for ultra-long fiber rope

Abstract

The invention relates to a pre-drafting device and a pre-drafting method for an ultra-long fiber rope, and belongs to the technical field of post-processing of fiber ropes. The invention provides a pre-drafting device for an ultra-long fiber rope. The pre-drafting device for the ultra-long fiber rope comprises a pay-off device, a fixed winding drum device, a drafting machine and a take-up device which are sequentially arranged from left to right. According to the super-long rope pre-drafting device and method, the ideal mechanical performance index of a fiber rope is achieved, the occupied area is small, the automation degree is high, and the drafting force is constant and adjustable. The pre-drafting operation of an ultra-long rope can be achieved in a very small space in real time, the control system automatically controls the variable frequency motor to run and stop according to the difference value between a numerical value measured by the torque sensor and a required numerical value, the variable frequency motor is locked, and the drafting force is made to be constant and can be continuously adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to a pre-drawing device and method for super-long fiber rope cable, and belongs to the technical field of fiber rope cable post-processing. BACKGROUND

[0002] The rope cable will be elongated after being loaded, and the breaking elongation is another most important performance index of the rope cable after the breaking strength and linear density. The newly made woven or twisted fiber rope cable often has a large elongation when a load is applied due to its dense structure, and part of the elongation is not recoverable, which is actually the structural elongation of the rope cable. For super-long rope cable products with high size stability, such as hoisting ropes, power traction ropes, sail ropes, deep-sea buoy mooring ropes, FPSO single-point and multi-point mooring ropes, etc., the structural elongation of the rope cable needs to be eliminated during the production process.

[0003] The best way to eliminate the structural elongation of the rope cable is to perform a cyclic pre-drawing process on the rope cable, that is, to perform a cyclic pre-drawing of stretching-keeping-relaxing-re-stretching-re-keeping-re-relaxing by applying a certain tension to the rope cable.

[0004] At present, the cyclic pre-drawing process of the existing technology on the rope cable is generally performed on a horizontal tension machine. For a rope cable product with a large length, such as a deep-sea buoy mooring rope with a length of 500 meters or more. However, the pre-stretching of the rope cable by applying tension to the rope cable by a vehicle can only be performed on a larger span site, and this stretching method has the problems of large occupied area, complex operation, difficult accurate control of the stretching force, easy fuzzing and contamination of the rope cable during the pre-drawing process, and safety hazards in the stretching. SUMMARY

[0005] In order to solve the above problems, the present application provides a super-long rope cable pre-drawing device and method, so that the fiber rope cable obtains ideal mechanical performance indexes, has small occupied area, high automation degree, and constant adjustable stretching force.

[0006] In a first aspect, the present application provides a pre-drawing device for a super-long fiber rope cable, comprising a pay-off device, a fixed drum device, a drawing machine and a take-up device arranged in sequence from left to right.

[0007] The fixed drum device comprises a drum shaft seat fixed to the ground by a drum frame, a drum is fitted in the drum shaft seat, drum pin shafts are installed on both sides of the drum frame, and the drum pin shafts can be inserted into the reserved holes on the drum for locking the drum.

[0008] The drawing machine comprises a drawing machine power mechanism fixed to the ground, and a pinion and two gear rings connected in sequence to the drawing machine power mechanism, wherein the gear ring close to the pinion and the gear ring far from the pinion are respectively engaged with a driving grooved wheel and a driven grooved wheel.

[0009] The pinion is driven by the drawing machine power mechanism to drive the driving grooved wheel to rotate, and the driving grooved wheel drives the driven grooved wheel to rotate, and the cable wound between the driving grooved wheel and the driven grooved wheel is transmitted.

[0010] Further, the drawing machine further comprises a drawing frame fixed to the ground, and two bearing seats are mounted on the drawing frame, and the bearing seats are respectively correspondingly mounted with the grooved wheel shafts of the driving grooved wheel and the driven grooved wheel.

[0011] Further, the gear rings outside the driving grooved wheel and the driven grooved wheel are connected by a intermediate gear.

[0012] Further, V-shaped grooves for the cable to pass through are arranged on the rims of the driving grooved wheel and the driven grooved wheel, and the cable is wound in parallel on the V-shaped grooves of the driving grooved wheel and the driven grooved wheel and generates static friction.

[0013] Further, the drawing machine power mechanism comprises a variable frequency motor fixed to the ground and a speed reducer connected to the variable frequency motor, and the output end of the speed reducer is connected with the pinion, and a brake is arranged on the variable frequency motor.

[0014] Further, the speed reducer is provided with a torque sensor for measuring the input torque of the speed reducer, and the tension value of the traction cable is calculated and outputted.

[0015] Further, an I-shaped wheel is arranged at the center of the winding drum, and shaft bases are arranged at both ends of the winding drum, and a plurality of reserved holes are distributed along the circumferential surface of the rim end surface of the winding drum.

[0016] Further, the cable can be wound 3-6 turns on the winding drum.

[0017] In the second aspect, the pre-drawing device is used, and the pre-drawing method comprises releasing the cable by the pay-off device, winding the cable on the winding drum of the fixed winding drum device, the driving grooved wheel of the drawing machine, and the driven grooved wheel of the drawing machine in sequence, and winding the cable on the take-up device and winding the cable by the take-up device.

[0018] Further, the pre-drawing method further comprises:

[0019] The tension of the cable is preset;

[0020] The winding drum is locked by inserting the winding drum pin shaft into the reserved hole on the winding drum;

[0021] The drawing machine power mechanism is started, and the cable is tightened under the traction of the driving grooved wheel and the driven grooved wheel under low-speed operation.

[0022] The control system controls the operation of the drafting machine power mechanism and continuously tightens the cable until the actual measured tension value is equal to the set value, and then controls the drafting machine power mechanism to stop;

[0023] The drafting state needs to be maintained for at least a period of time;

[0024] The drafting machine power mechanism is reversely operated to slacken the cable, and the cable is drafted to the set tension again, and the drafting state is maintained for a period of time;

[0025] The drum pin shaft on the drum is pulled out to release the drum.

[0026] The beneficial effects of the present application are:

[0027] In the present application, the cable is wound on the drum for 3-5 turns after being drawn out from the pay-off device; the cable is sequentially passed through the driving groove wheel and the driven groove wheel, and is wound in parallel for 3 turns, and then is passed through the thread guide wheel and enters the take-up device; the drum pin shaft on the fixed drum device is inserted into the reserved hole on the drum to lock the drum; the variable frequency motor of the drafting machine is started, and the cable is tightened under the traction of the groove wheel at low speed; the control system controls the rotation of the variable frequency motor to continuously tighten the cable, so that the actual measured tension value is equal to the set value; the variable frequency motor is stopped and the brake is applied; the drafting state is maintained for a period of time; the variable frequency motor is reversed after the brake is released, the cable is slackened, the cable is drafted to the set tension again, and the drafting state is maintained for a period of time; the brake of the variable frequency motor is disconnected, and the drum pin shaft on the fixed drum device is pulled out; the variable frequency motor is operated at high speed to draft the cable into the take-up device, and the cable is wound on the take-up drum under the driving of the take-up motor; the above operation can be repeated to perform the pre-drafting operation on the super-long fiber cable.

[0028] The present application can realize the pre-drafting operation of the super-long cable in a small space in real time, the control system automatically controls the operation and stop of the variable frequency motor according to the difference between the value measured by the torque sensor and the required value, and locks the motor, so that the drafting force is constant and can be continuously adjusted. In fact, the cyclic pre-drafting method of the present application, which is stretching-maintaining-slackening-redrafting-re-maintaining-re-slackening, can obtain the ideal mechanical performance indicators of the fiber cable, and the fiber cable obtained by the pre-drafting method has better creep resistance, smaller elongation, higher breaking strength and longer service life. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a side view of the overall structure in an embodiment of the present application.

[0030] Figure 2 It is a top view of the overall structure in an embodiment of the present application.

[0031] Figure 3 It is a schematic view of the drum structure in an embodiment of the present application.

[0032] Figure 4 Figure 1 is a schematic view of the structure of the drawing frame in an embodiment of the present application.

[0033] In the figure, 1 is a drawing device; 1-1 is a drawing frame; 1-2 is a drawing reel;

[0034] 2 is a fixed reel device; 2-1 is a reel frame; 2-2 is a reel; 2-3 is a reel pin shaft; 2-4 is a reel shaft seat;

[0035] 3 is a drawing frame; 3-1 is a drawing frame; 3-2 is a variable frequency motor; 3-3 is a torque sensor; 3-4 is a speed reducer; 3-5 is a pinion; 3-6 is a driving fluted roller; 3-7 is a driven fluted roller; 3-8 is a intermediate gear; 3-9 is a bearing seat; 3-10 is a fluted roller shaft; 3-11 is a intermediate gear shaft; 3-12 is a gear ring; 3-13 is a thread guide roller;

[0036] 4 is a take-up device; 4-1 is a take-up frame; 4-2 is a take-up motor; 4-3 is a take-up reel;

[0037] L is the length of each drawing. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, the "first", "second" are only used to distinguish the same type of components / parts in different positions or different characteristics, and have no other limiting meanings; the "upper" refers to the direction of each component away from the ground, and the "lower" refers to the direction of each component away from the ground.

[0041] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. "Under", "below" and "underneath" of a first feature to a second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0042] The present application provides a super-long rope cable pre-stretching device and method, which enables the fiber rope cable to obtain ideal mechanical performance indicators, has small floor area and high degree of automation, and constant adjustable stretching force.

[0043] In Figures 1-2 The present application provides a pre-stretching device for a super-long fiber rope cable, which comprises a pay-off device 1, a fixed drum device 2, a stretching machine 3 and a take-up device 4 fixed to the ground in sequence from left to right. Generally, the rope cable is released from the pay-off device 1 and then passes through the fixed drum device 2 and the stretching machine 3 to reach the take-up device 4 for collection.

[0044] In Figure 3 The fixed drum device 2 comprises a drum shaft seat 2-4 fixed to the ground by a drum frame 2-1, the drum shaft seat 2-4 is fitted with a drum 2-2, drum pin shafts 2-3 are installed on both sides of the drum frame 2-1, and the drum pin shafts 2-3 can be inserted into the reserved holes on the drum 2-2 to lock the drum 2-2.

[0045] In some embodiments, the drum 2-2 is provided with an I-shaped wheel in the center and shaft seats at both ends, and the rim end surface of the drum 2-2 is circumferentially distributed with a plurality of reserved holes.

[0046] In some embodiments, the rope cable can be wound 3-6 turns on the drum 2-2, the drum 2-2 can be locked by the pin shaft to prevent rotation and withstand the maximum static strength of the traction force.

[0047] In Figure 4In the example, the drawing machine 3 comprises a drawing machine power mechanism fixed on the ground, and a pinion 3-5 and two gear rings 3-12 connected in sequence with the drawing machine power mechanism, and the gear ring 3-12 outside the driving groove wheel 3-6 and the driven groove wheel 3-7 are connected through the intermediate gear 3-8. The gear ring 3-12 close to the pinion 3-5 and the gear ring 3-12 away from the pinion 3-5 are respectively engaged with the driving groove wheel 3-6 and the driven groove wheel 3-7. The drawing machine 3 further comprises a drawing frame 3-1 fixed on the ground, and two bearing seats 3-9 are installed on the drawing frame 3-1, and the groove wheel shafts 3-10 of the driving groove wheel 3-6 and the driven groove wheel 3-7 are respectively installed on the two bearing seats 3-9.

[0048] In Figure 4 the example, the drawing frame 3-1 is a combination of two trapezoidal frames, and the side is provided with a grid, which can stabilize the drawing machine 3, facilitate heat dissipation of the drawing machine 3, and also be conducive to reducing manufacturing cost and realizing lightweight.

[0049] In some embodiments, the pinion 3-5 is driven by the drawing machine power mechanism to drive the gear ring 3-12 outside the driving groove wheel 3-6 to rotate, and the driving groove wheel 3-6 also rotates synchronously, and then the driving groove wheel 3-6 drives the driven groove wheel 3-7 and the gear ring 3-12 outside the driven groove wheel 3-7 to rotate together through the intermediate gear 3-9, and the cable wound between the driving groove wheel 3-6 and the driven groove wheel 3-7 is transmitted.

[0050] In Figure 2 the example, the rim of the driving groove wheel 3-6 and the driven groove wheel 3-7 is provided with a V-shaped groove for the cable to pass through, and the cable is parallel wound on the V-shaped grooves of the driving groove wheel 3-6 and the driven groove wheel 3-7 and generates static friction.

[0051] In some embodiments, the drawing machine power mechanism comprises a variable frequency motor 3-2 fixed on the ground and a speed reducer 3-4 connected with the variable frequency motor 3-2, and the output end of the speed reducer 3-4 is connected with the pinion 3-5, and the variable frequency motor 3-2 is provided with a brake for emergency stop of the drawing machine 3.

[0052] In some embodiments, the speed reducer 3-4 is provided with a torque sensor 3-3 for measuring the input torque of the speed reducer 3-4, and the tension value of the traction rope is calculated and outputted after calculation, and a human-computer interface can be configured to display the output data.

[0053] In Figures 1-2 the example, the pay-off device 1 comprises a pay-off frame 1-1 fixed on the ground, and the pay-off disc 1-2 is hinged on the pay-off frame 1-1 through assembly of a pay-off disc shaft; the take-up device 4 comprises a take-up frame 4-1 fixed on the ground and a take-up motor 4-2, and the take-up disc 4-3 is hinged on the take-up frame 4-1 through assembly of a take-up disc shaft.

[0054] Embodiment 1

[0055] Using the pre-stretching device, the pre-stretching method comprises releasing the rope cable from the pay-off device 1, winding the rope cable on the reel 2-2 of the fixed reel device 2, the driving sheave 3-6 and the driven sheave 3-7 of the stretching machine 3 in sequence, and then winding the rope cable on the take-up device 4 and being taken up by the take-up device 4.

[0056] Specifically, the method comprises the following steps:

[0057] Step one: after the rope cable is drawn out from the pay-off disc, it is wound on the reel 3-5 for three turns; the rope cable is continuously pulled to pass through the driving sheave 3-6 and the driven sheave 3-7, and after being wound in parallel for three turns, it passes through the line guide 3-13 and enters the take-up device 4 to pre-set the pulling tension of the rope cable;

[0058] Step two: the reel pin shaft 2-3 is inserted into the reserved hole on the reel 2-2 to lock the reel 2-2;

[0059] Step three: the variable frequency motor 3-2 of the power mechanism of the stretching machine is started, and the rope cable is pulled tight under the traction of the driving sheave 3-6 and the driven sheave 3-7 at low speed;

[0060] Step four: the variable frequency motor 3-2 is controlled to run and continuously pull the rope cable until the actual measured pulling force value is equivalent to the set value, and then the variable frequency motor 3-2 is controlled to stop and brake;

[0061] Step five: the stretching state needs to be maintained for at least a period of time;

[0062] Step six: the variable frequency motor 3-2 is reversely operated to relax the rope cable, the rope cable is stretched to the set tension again, and the stretching state is maintained for a period of time;

[0063] Step seven: the brake of the variable frequency motor 3-2 is disconnected, and the reel pin shaft 2-3 on the reel 2-2 is pulled out to release the reel 2-2.

[0064] Step eight: the variable frequency motor 3-2 is operated at high speed to pull the rope cable into the take-up device 4, and the rope cable is wound on the take-up disc 4-3 under the driving of the take-up motor 4-2.

[0065] After the rope cable is pulled for L length under the high-speed traction of the variable frequency motor, steps two to seven are repeated.

[0066] Although the present application has been disclosed with reference to the preferred embodiments as above, it is not intended to limit the present application, and any person skilled in the art can make various modifications and modifications without departing from the spirit and scope of the present application, therefore the protection scope of the present application should be defined by the claims.

Claims

1. A pre-tensioning device for ultra-long fiber ropes, characterized in that, It includes, from left to right, a wire feeding device, a fixed drum device, a drawing machine, and a wire take-up device; The fixed drum device includes a drum shaft seat fixed to the ground by a drum frame, a drum is fitted inside the drum shaft seat, and drum pins are installed on both sides of the drum frame. The drum pins can be inserted into the reserved holes on the drum to lock the drum. The drawing machine includes a drawing machine power mechanism fixed to the ground, a pinion gear and two gear rings that mesh with the drawing machine power mechanism in sequence, and a driving grooved wheel and a driven grooved wheel respectively meshing in the gear rings near the pinion gear and the gear rings away from the pinion gear. The power mechanism of the drawing machine drives a pinion to rotate the driving groove wheel, which in turn drives the driven groove wheel to rotate. The cable wound between the driving and driven groove wheels is then conveyed.

2. The pre-stretching device according to claim 1, characterized in that, The drawing machine also includes a drawing frame fixed to the ground, on which two bearing seats are installed, and the two bearing seats respectively install the wheel shafts of the driving wheel and the driven wheel.

3. The pre-stretching device according to claim 2, characterized in that, The active and driven grooved wheel are connected by a gear meshing.

4. The pre-stretching device according to claim 3, characterized in that, Both the driving and driven grooved wheels have V-shaped grooves on their rims for the passage of ropes. The ropes are wound in parallel on the V-shaped grooves of the driving and driven grooved wheels, generating static friction.

5. The pre-stretching device according to claim 4, characterized in that, The power mechanism of the drawing machine includes a variable frequency motor fixed to the ground and a reducer connected to the variable frequency motor. The output end of the reducer is connected to a pinion, and a brake is provided on the variable frequency motor.

6. The pre-stretching device according to claim 5, characterized in that, The reducer is equipped with a torque sensor to measure the input torque of the reducer, and then calculates and outputs the tension value of the traction rope.

7. The pre-stretching device according to claim 1, characterized in that, The drum has an I-beam wheel at its center and shafts at both ends. The rim of the drum has multiple pre-drilled holes distributed circumferentially.

8. The pre-stretching device according to claim 7, characterized in that, The rope can be wound 3-6 times on the drum.

9. A pre-stretching method for ultra-long fiber ropes, characterized in that, Using the pre-stretching device according to any one of claims 1-8, the pre-stretching method includes releasing a cable by a release device, the cable passing sequentially through the drum of a fixed winding device, the driving grooved wheel and the driven grooved wheel of a stretching machine, and then being wound up by a take-up device.

10. The pre-stretching method according to claim 9, characterized in that, The pre-stretching method further includes: The traction tension of the rope is preset; The drum is locked by inserting the drum pin into the reserved hole on the drum. Start the power mechanism of the drawing machine, and the rope will be tightened under the traction of the driving pulley and the driven pulley at low speed; The system controls the operation of the drawing machine's power mechanism and continuously tightens the rope until the actual measured tension value is equal to the set value, and then controls the drawing machine's power mechanism to stop. It is necessary to maintain the stretched state for at least a period of time; The reverse operation of the drawing machine's power mechanism loosens the cable, then draws the cable back to the set tension and maintains the drawn state for a period of time. Pull out the drum pin on the drum to release the drum.

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