RU2317240C1 - Cable rewinder - Google Patents

Abstract

FIELD: mechanical engineering; cable rewinders.

SUBSTANCE: invention relates to processing equipment designed for rewinding of cables, diameter from 60 mm and greater. Design of cable rewinder including feeder bed frame carrying holder, lift and electric drive of feed drum and stationary frame of receiver which carries spreader and holder or receiving drum with its lift and rotation electric drive provides linearity of cable section between drums during entire period of rewinding keeping cable tangentially to circumferences formed by last layers of cable coils on drum necks. Plane in which section of cable between drums is located can change angle of tilting relative to floor at change of radii of said circumferences. Reciprocate spreader includes actuator, linear guides and carriage and it is secured on carrying platform. Platform is installed for vertical travel relative to stationary frame of receiver. Movable carriage of spreader is made on base of two interconnected plates arranged one over the other. Lower plate is connected with linear guides of spreader for sliding along guides and it has constant horizontal position. Upper plate is made for changing angle of tilting relative to lower plate in plane square to linear guides of carriage and it has roller unit on its upper surface which includes measuring wheel of meter in additional to support, pressure and guide rollers. Said measuring wheel is arranged between support rollers on which cable lays and it serves as middle support. Guide rollers are arranged in pairs vertically on edges of upper, plate, forming inlet and outlet slots for passing freely pressed cable. Pressure rollers are arranged over cable in projection of support rollers, limiting possible displacement upwards in movement through roller unit. Moreover, spreader contains measuring unit with pickups detecting vertical angle of deflection of cable from plane of upper plate and pickup detecting side deflection of cable from straight line passing along plane of upper plate of movable carriage pf spreader between guide rollers. Rails can be laid on floor under bed frame of feeder parallel to axis of rotation of feed drum along which bed frame can move on wheels secured from bottom under action of linear motion mechanism. Actuator to provide vertical travel of carrying platform of spreader can be arranged in lower part of stationary frame. Carrying platform can be held of vertical posts secured in corners on its lower surface. Posts must be arranged inside guide bushings secured lower on stationary frame. Smaller actuator connected with corresponding end of upper plate to control its tilting can be secured on one of ends of lower plate of spreader carriage.

EFFECT: compact design, reduced to minimum possible deformations of cable in process of rewinding.

5 cl, 2 dwg

Description

FIELD OF THE INVENTION

The invention relates to technological equipment for rewinding mainly a thick cable with a diameter of 60 mm and above. Cable rewinder provides high requirements for minimizing deformation during rewinding. It can also be used to rewind fiber, where the requirements for the safety of the product are also very high.

State of the art

Enterprises engaged in the production and sale of cable products are interested in special devices designed for convenient, quick rewind of cable from drum to drum, equipped with counters of length and quantity of rewound material. Moreover, these devices should not stretch or somehow distort the rewound material and should not violate the electrical insulation, as this can lead to a change in the regulatory electrical characteristics.

From the advertising material posted on the Internet at www.peremotka.ru, the constructions of heavy-class machines designed to rewind cable from drum to drum are known. The UPK-25-RF-001 machine can use drums from 10 to 22 number and consists of three parts: a giving stand for 5000 kg, a measuring table with an electronic counter and a receiving stand for 3000 kg. Designed to rewind cable up to 65 mm in diameter. The machine is equipped with a SEW-Eurodrive gear motor. The presence of a frequency converter allows you to smoothly change the speed of the rewind from 2 to 35 revolutions per minute. The UPK-22-PRG machine is designed to rewind the cable to the drum and can use the reels from 16 to 22 number. It consists of two parts: an automatic cable distributor, combined with a length meter with an electronic meter, a receiving rack for 3000 kg. Designed for rewinding cable with a diameter of up to 65 mm. The receiving rack is equipped with a hydraulic elevator for lifting and lowering the reels with cable, allows you to unwind the cable without involving hoisting mechanisms. Both the machine and the cable distributor are equipped with a SEW-Eurodrive motor gearbox. The presence of a frequency converter allows you to smoothly change the speed of the rewind from 2 to 35 revolutions per minute. As an additional complete set the technological drum can be used. The giving part can be used a screw jack, a hydraulic jack, a rack for drums.

The disadvantage is the lack of constructive measures to prevent deflection of the cable in the stretch between the reels, which does not allow rewinding a thick heavy cable without deformation.

Also known is a cable rewinder, proposed for sale by the Perm enterprise Emotech (website http://emotek.netfirms.com). It consists of three designs: a transmitter (a device designed for placement and manipulation with a pick-up drum with a diameter of 400-800 mm), a receiver (device for placement and manipulation with a pick-up drum with a diameter of 400-800 mm and a pickup mounted on one bed) and located between them meter meter. The meter is a separate device placed on a vertical support and includes guides and pressure rollers, between which a winding cable passes. The upper clamping horizontal roller is a measuring wheel, that is, a meter meter sensor. The overall minimum width of this rewinder is 4 m.

The disadvantages are: the presence of at least three places of cable bend in the area between the transmitter and the receiver, which can lead to cable deformation and increase the measurement error of the meter counter. The three most obvious curvatures are present:

the first curvature is on the guide rollers of the distributor;

the second curvature is on the measuring wheel of the meter meter;

the third curvature is on the supporting output roller of the transmitter.

No technical solutions aimed at reducing possible deformations in places of cable bending were not detected.

The closest device to the claimed one is the installation for rewinding cables and wires universal CPC 22/18 ", taken by the authors as a prototype. The information was obtained from the site www.ck-ktt.com.ua, owned by LLC" Keltorgtechnika ", a developer and manufacturer of marking equipment for wires and cables of all sections The unit is designed to rewind cables with an outer diameter of up to 75 mm from drums of types 8-22 weighing up to 6.0 tons to drums of types 8-18 weighing up to 3.5 tons or into a bay with an inner diameter of 700 mm and an outer diameter up to 1000 mm, width 500 mm, weight ohm up to 200 kg.

Specifications:

- receiving station for drums: up to type 18;

- installation design: type "swinging farm";

- the drums are lifted by a hydraulic jack;

- drum rotation drive: n = 1000 rpm, engine N = 4.0 ... 5.5 kW;

- transmission: gearbox at 4 speeds, worm gear;

- angular velocity of the receiving drum: 6; 9; 12; 18 per minute;

It is equipped with a bay receiver for bays weighing 200 kg, a measuring unit with a measuring wheel with a diameter of 159.2 mm, an electronic counter-programmer, a duplicating mechanical revolution counter, blocks of guide rollers for cable passage up to d = 75 mm, a mechanism for laying out the turns of reciprocating movement with a mechanical drive and infinitely adjustable two axles for drums with a carrying capacity of 1.5 and 3.5 tons.

Overall dimensions of the unit in working condition (with drums installed): length not more than 10,000 mm, width 2,700 mm, height 2,300 mm.

Installation weight no more than 2000 kg.

The disadvantages of this installation:

1. The possible formation of deformations due to bending of the cable on the measuring unit, more precisely on the measuring wheel of the rev counter. The height of the spreader and the measuring wheel of the rev counter is constant and is determined by the height of the frame on which the spreader is placed. The drums have the ability to raise and lower like a "swinging truss", but still the cable at the place of clamping the measuring wheel is forced to deform, since it bends around it in an arc with a radius of curvature corresponding to the radius of the measuring wheel. The large thickness of the cable completely deprives it of flexibility, so even small bends can violate its insulation.

2. Large dimensions and occupied area, primarily due to the large distance between the transmitter and receiver — up to 10 m, which is due to the need to ensure as little deformation of the cable as possible due to its bends during rewinding.

Disclosure of invention

To avoid deformations of the cable being unwound, it is necessary to ensure the straightness of the cable section between the transmitter and the receiver, especially the section located in the area of the distributor and meter meter. This allows you to fully preserve all the regulatory electrical parameters of the products and ensure high accuracy in measuring the length of the cable being unwound. In fact, the section of cable between the transmitter and receiver will be tangent to the circles formed by the last wound layers on the necks of the transmitter and receiver. Moreover, the tangent can move along the linear guides of the spreader with the speed of the carriage, and the virtual plane in which this tangent moves can change its inclination to the floor as the turns from the delivery drum decrease and, accordingly, the turns are added to the take-up drum.

The measuring wheel of the meter meter, located between the transmitter and the receiver, should have a minimal effect on the cable passing through the roller assembly in order to eliminate any cable deformation and ensure maximum meter measurement accuracy.

Thus, at any moment in time on a straight line should be three points:

the point of contact of the cable to the neck with wound coils of the giving drum;

the point of contact of the cable to the neck with wound coils of the receiving drum;

point where the cable touches the measuring wheel.

The essence of the invention lies in the fact that the design of the cable rewinder, including the frame of the pickup, on which the holder, hoist and electric drive of rotation of the pickup drum are fixed, and the stationary frame of the receiver, on which the pickup and the holder of the pickup drum are fixed with its hoist and motor of rotation, provides of the entire rewinding process, the straightness of the cable section between the reels, which becomes tangent to the circles formed by the last layers of cable turns on ykah drums. Moreover, the virtual plane itself, in which the cable section between the reels is constantly located, can change the angle of inclination with respect to the floor as the radius of these circles changes, since the cable turns decrease from one drum and are wound onto the other.

This is achieved by the following technical solution.

The distributor, which is the mechanism for the layout of the turns of the reciprocating type, which includes an actuator, linear guides and a carriage, is mounted on a supporting platform. The platform has the ability to move vertically relative to the stationary frame of the receiver. The movable carriage of the distributor is made on the basis of two interconnected plates located one above the other. The bottom plate is connected to the linear guide rails of the distributor with the possibility of sliding along them and has a constant horizontal position. The upper plate is made with the possibility of changing the angle of inclination to the lower plate in a plane perpendicular to the linear guides of the carriage, and contains on its upper surface a roller assembly, which, in addition to the support, pressure and guide rollers, includes a meter wheel of the meter. Moreover, the measuring wheel is located between the support rollers, on which the cable itself lies, and is, as it were, the middle support. The guide rollers are arranged in pairs vertically at the edges of the upper plate, forming the inlet and outlet slots for freely pressed cable passage. Pinch rollers are located above the cable from above in the region of the support rollers, limiting the possible displacement upward when moving through the roller assembly. In addition, the aligner contains a measuring unit with sensors for the vertical angle of the cable’s deviation from the plane of the upper plate in the area between the transmitter and the roller unit and a cable lateral deviation sensor in the same area from the ideal virtual straight line passing along the plane of the upper plate of the moving carriage of the distributor between the guide rollers.

Under the pickup bed on the floor, rails can be laid parallel to the axis of rotation of the pickup drum and the mechanism for linear movement of the pickup bed along these rails on wheels fixed to the bottom of the pickup bed.

An electric drive (actuator) can be located in the lower part of the stationary frame, providing the possibility of vertical movement of the bearing platform of the distributor.

The supporting platform can be supported on vertical struts fixed at the corners of its lower surface, each vertical strut having to go inside its guide sleeve fixed below on a stationary frame.

At one end of the bottom plate of the movable carriage of the pickup, a small actuator can be fixed, connected to the corresponding end of the top plate and controlling its inclination with respect to the bottom plate.

All actuators, rotation motors, lifts, meter counter are controlled by a control device (controller), to which signals from the measuring unit are received as feedback. Any deviation of the cable section between the reels from an ideal rectilinear shape (in three-dimensional measurement) causes the generation of corresponding signals by the sensors of the measuring unit, which, in turn, cause the generation of control signals for all electrical devices that correct these deviations by moving to the appropriate position: the carrier platform the spreader, the bed of the pickup, the upper plate of the spreader carriage, the axes of the holders of the giving and receiving drums.

Short description of graphic figures

Figure 1 shows the profile of the overall design of the cable rewinder.

Figure 2 presents a top view of the General design of the cable rewinder.

The implementation of the invention

The cable 1 is rewound from the transfer drum 2 to the receiving drum 3 by means of the inventive device - cable rewinder.

The cable rewinder consists of a transmitter and receiver with a pickup.

The receiver consists of a stationary frame 4, on which the guide sleeves 5 of the receiving drum hoist and the guide sleeves 6 of the vertical movement mechanism of the pickup are rigidly fixed. The guide shafts 7 of the receiving drum lift and the guide shafts 8 of the vertical movement mechanism of the pickup are respectively vertically mounted in these guide bushings. At the upper ends of the guide shafts 7, a holder 9 of the receiving drum is fixed, consisting of two parts, between which the receiving drum 3 is located on the supports protruding from the holder. Moreover, one support is a pinol 10, and the other is the spindle of the electric drive 11 of the rotation of the receiving drum. To raise and lower the drum 3 under each part of the holder 9 on the frame 4 installed electric screw jacks 12.

At the upper ends of the guide shafts 8, a supporting platform 13 is fixed, on which the design of the distributor is based. For vertical movement of the distributor, an actuator 14 is fixed on the frame 4, the pushing rod of which abuts against the supporting platform 13. On top of the supporting platform 13, parallel to the axis of rotation of the receiving drum 3, rails 15 are placed along which the distributor carriage moves under the influence of the actuator 16, mounted on one from the ends of the supporting platform 13.

The distributor carriage is made on the basis of two interconnected plates located one above the other. The lower plate 17 is located on the rails 15 and provides movement along the rest of the superstructure of the carriage, and the upper plate 18 is connected to the bottom by means of an axial mechanism 19, which makes it possible to change the angle of inclination to the lower plate in a plane perpendicular to the linear guides 15 of the carriage. To control the inclination of the upper plate 18, a small actuator 20 is used, in which the end of the pushing rod is pivotally connected to the lower surface of the upper plate 18, and it is fixed on the lower plate 17. The upper plate 18 contains a roller assembly having support rollers 21, pressure rollers 22, guide rollers 23, and a measuring wheel 24 is located between the support rollers 24. A measuring unit is mounted on the upper plate 18 to track deviations of the cable direction in the vertical and horizontal planes. It includes two sensors 25 of the vertical angle of deviation of the cable from the plane of the upper plate 18, rollers 26 of vertical clamping (along the edges of the upper plate 18), a sensor 27 of lateral deviation of the cable from an ideal virtual straight line passing along the plane of the upper plate of the moving carriage of the distributor between the guide rollers on plot the transmitter - input guide rollers, roller 28 horizontal clamping.

The transmitter consists of a platform 29, on which the guide columns 30 are rigidly fixed. The guide shafts 31 of the elevator of the delivery drum are located in these columns. At the upper ends of these guide shafts, a holder 32 of the delivery drum is fixed. It consists of two parts, between which the drum itself is located on the protruding cylindrical supports, one of which is the end of the pin 33, and the other is the spindle of the drive 34 of the rotation of the delivery drum.

Beneath the platform 29 there are wheels 35 with a profile corresponding to the rails 36 laid on the floor parallel to the axes of rotation of the drums 2 and 3. The entire design of the pickup can be moved along these rails using a linear movement mechanism 37, kinematically connected to the platform 29. To raise and lower the pickup drum designed electric screw jacks 38, mounted on a platform 29 under each part of the holder 32.

The operation of the cable rewinder is as follows.

Cable rewind sensors and control windings of all electric motors are combined into a single system controlled by a controller (for example, any industrial computer).

As sensors 25 of the vertical angle of cable deflection and sensor 27 of lateral cable deflection, you can use sensors of the type RPN 1A112 (http://content.honeywell.com/sensing/products).

As actuator 16 for the aligner, you can use the actuator UBA-1 (V = 175 mm / s, dynamic force 550 N).

As electric screw jacks 12 and 38, MA80 electric screw jacks can be used (lifting force of 80 kN, lifting speed of 64.3 mm / s).

As actuator 14, you can use the actuator UAL3 (speed 360 mm / sec).

As a small actuator 20, you can use the actuator LAS-2-1-50-50-24 (Korea, HIWIN).

As the linear displacement mechanism 37, an ATL50 actuator can be used.

Note: MA80, ATL50, UBA1, UAL3 models are manufactured by Servomekh, Chelyabinsk.

Before starting the rewind, the parameters of the giving and receiving drums, the cable thickness, the required footage of the winding on the receiving drum are set. In accordance with the specified parameters, the holders of the drums with the help of elevators are raised to a certain height so that the cable passed through the distributor represents a straight section between the points of contact with the necks of both drums. That is, the cable section lying on the upper plate of the distributor carriage and passed through the guide rollers should lie on an ideal virtual line passing from the transmitter to the receiver along the plane of the upper plate of the movable carriage of the distributor.

The signals from the measuring unit, namely from the sensors 25 of the vertical angle of the cable deviation from the plane of the upper plate 18 and the sensor 27 of the lateral cable deviation from the above-described ideal virtual straight line, should be signals of the initial state of the rewinding process.

After turning on the electric drives of rotation of both drums (11, 34), feedback immediately turns on. That is, continuous monitoring of the state of the cable section between the transmitter and the receiver begins. As the layers of the cable decrease from the returning drum 2, the lowering of the carrier platform 13 of the pickup is smoothly lowered. And, accordingly, as the coils are replenished to the receiving drum 3, it smoothly rises. In this case, the sensors 25 of the vertical deviation of the cable from the plane of the upper plate monitor the straightness of the cable section between the transmitter and receiver. In case of violation of this linearity, they give a signal to start the actuator 14, which ensures vertical movement of the distributor, and a small actuator 20, which provides a change in the angle of inclination of the upper plate 18 of the distributor carriage with respect to the lower plate 17 in a plane perpendicular to the linear guides 15 of the carriage.

As for the possible curvature of the cable in the area between the pickup and the roller assembly, due to the fact that the length of the neck of the pickup drum does not correspond to the length of the neck of the pickup drum and the reciprocating movement of the pickup does not depend on the position of the next winding coil, sensor 27 serves to eliminate this lateral deviation of the cable. The signal from this sensor 25 is converted into a control signal of the linear movement mechanism 37, providing horizontal movement of the giving drum 2 along the rails 38.

To track the rewound meters of the cable, a measuring wheel is used, the rotation of which determines the friction force between the surface of the measuring wheel and the cable being pulled. This measuring wheel is a meter meter sensor in which the number of revolutions of the measuring wheel is converted to cable length.

The rewinder has the ability to manually (from buttons) control all electric drives. Therefore, it is advisable to bring the spreader to the beginning of the layout, i.e. to the side cheek of the drum, before rewinding. The transmitter platform with the drum installed is moved so that when the cable is threaded through the pickup rollers, there is an approximately straight line. This is due to the fact that for a thick cable, for example ⌀100 mm, it will be much easier to refuel and fasten. It is also advisable when working with a thick cable at the charging stage to lower the distributor vertically as low as possible, since the length of the cable with a large diameter is quite heavy. After charging and securing the cable in manual mode, the handler should be raised approximately to the level of the midpoint (intermediate) point tangent to the reels. These measures at the initial stage of charging and securing the cable, in addition to facilitating manual operations, will also allow not to deform the initial length of the cable.

Sensors 25, for example, of type RPN 1A112 (http://content.honeywell.com/sensing/products), are configured in such a way that they provide an indication of the angle of deviation of the cable direction to zero while observing the parallelism of the cable segment between the touch points of the receiving and returning reels and the plane of the upper plate 18. At the same time, the condition is fulfilled that the spring-loaded rollers 26 are supported on the specified length of cable. Similarly, the sensor 27 also shows the value “zero” while observing the straightness of the cable section in the area between the nearest pair of vertical guide rollers 23 and the pickup drum 2 relative to the cable piece in the area between the same rollers and the pickup drum 3. That is, there is no cable break at its point contact with the guide rollers 23 (the roller 28 only relies on the cable). Since the sensors 25, 27 have a measuring range from minus 45 ° to plus 45 °, a change in the value of the angle with a zero point indicates the actions of the actuator 20 aimed at maintaining a zero value of the mismatch angle. If the values of the sensors 25, non-zero, have the same sign, then this indicates the need to raise or lower the pickup in a vertical coordinate.

Changes in the value with the sign of the sensor 27, non-zero, indicate the movement of the platform 29 along the rails in the corresponding direction to maintain a zero level of mismatch of the angle.

Since the linear speed of the cable rewind is the same for the receiving and giving device, respectively, the angular speeds of the receiving and giving reels will be different. To ensure synchronization of work, the speed of movement of the distributor is proportional to the speed of rotation of the receiving drum 3, and the speed of movement of the platform 29 along the rails is proportional to the speed of rotation of the giving drum 2. The thickness of the rewind cable is taken into account.

The initialization is as follows.

From the drum of the transferring device, a cable is passed through the system of rollers of the distributor and fixed to the neck of the receiving drum at the cheek. They give the command to the distributor to go to the beginning of the layout, that is, to approach the same cheek. The cable is pre-tensioned by slowly turning the take-up reel in the rewinding direction with the retractable pick-up reel braked. At the same time, the readings of all sensors are measured, and if there is a mismatch, the corresponding electric drives are turned on to reduce the mismatch error to zero. The output of the distributor to its initial state and zero mismatches of the sensors 25, 27 guarantee that the cable segment will be tangent to the points of the drums and at the same time there will be no kink in the vertical plane.

Thus, the operation of the entire cable rewinder electric motor control system is aimed at maintaining the cable section between the transmitter and the receiver in the form of an ideal straight line in three-dimensional space (that is, both in the vertical plane and in the plane of the upper plate of the pickup carriage).

At the same time, due to the meter wheel of the meter located between the support rollers, the meter is measured continuously. When the specified number of rewound meters is reached, the cable rewinder is turned off and the rewinding process stops.

The total area occupied by the claimed rewinder is significantly lower compared with the analog due to the closer relative position of the transmitter and receiver. In this case, the rewound cable will have greater reliability in operation, since it undergoes minimal bending deformations during the rewinding process.

Claims (5)

1. A cable rewinder containing a bed of a transmitter on which a holder, a hoist and an electric drive of rotation of a delivery drum are fixed, and a stationary frame of a receiver on which a handler and a holder of a receiving drum are mounted with its elevator and an electric drive of rotation, wherein the distributor is a mechanism for laying out the reciprocating turns type, which includes an actuator, linear guides and a carriage that can slide along linear guides under the influence of the actuator, and on top of the car A roller assembly is located on the net, containing vertically oriented guide rollers for cable passage between them, as well as a metering meter measuring wheel, characterized in that the bed of the pickup is made with the possibility of horizontal movement along the axis of rotation of the giving drum, and the pickup contains a supporting platform on which the whole its design, while the supporting platform is made with the possibility of vertical movement relative to the stationary frame of the receiver, and the pickup carriage is made on b two plates located one above the other at a certain distance, the lower plate being connected to the linear guides of the spreader with the possibility of sliding along them, and has a constant horizontal position, and the upper plate is fixed to the bottom with the possibility of changing the angle of inclination relative to it in a plane perpendicular to the movement carriage, and contains on its surface a roller unit in which between the two pairs of vertical guide rollers are fixed two support rollers for the rewind cable, a clamping roller is fixed above each of them, and a metering meter measuring wheel is placed between the support rollers, which is also a support for the cable; in addition, the layout includes measuring units with sensors for the vertical angle of the cable’s deviation from the plane of the upper plate and a sensor for lateral deviation of the cable from an ideal virtual straight line passing along the plane of the upper plate of the movable carriage of the distributor between the guide rollers. 2. The cable rewinder according to claim 1, characterized in that it comprises rails laid on the floor parallel to the axis of rotation of the drum under the detector bed, and a linear movement mechanism kinematically connected to the said bed, and wheels with a profile corresponding to these are fixed on the bottom surface of the bed rails. 3. The cable rewinder according to claim 1, characterized in that an actuator is mounted in the lower part of the stationary frame, the pushing rod of which is connected to the carrier platform of the pickup. 4. The cable rewinder according to claim 1 or 3, characterized in that the supporting platform comprises vertical posts fixed at the corners of its lower surface, and guide bushings are fixed below on a stationary frame, so that each vertical column enters its own guide sleeve. 5. The cable rewinder according to claim 1, characterized in that a small actuator is fixed at one end of the lower plate of the movable carriage of the pickup, the end of the pushing rod of which is pivotally connected to the lower surface of the upper plate.

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