CN212222083U - Anti-skid braking device for steel wire rope of friction hoist - Google Patents
Anti-skid braking device for steel wire rope of friction hoist Download PDFInfo
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- CN212222083U CN212222083U CN202020702518.0U CN202020702518U CN212222083U CN 212222083 U CN212222083 U CN 212222083U CN 202020702518 U CN202020702518 U CN 202020702518U CN 212222083 U CN212222083 U CN 212222083U
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Abstract
The utility model belongs to the field of mine hoisting equipment, and discloses a friction hoist steel wire rope antiskid braking device, which comprises two brakes symmetrically arranged on two sides of a steel wire rope, wherein each brake comprises a frame, two swing arms arranged on the frame, an electric push rod and a lining plate, one end of each swing arm is hinged with the frame, the other end of each swing arm is hinged with the lining plate, the two swing arms, the frame and the lining plate form a parallel four-bar linkage mechanism, and an antiskid friction liner matched with the steel wire rope is arranged on the lining plate; one end of the electric push rod is connected with the frame, and the other end of the electric push rod is connected with the lining plate. The utility model discloses can realize friction lifting machine's antiskid, can wide application in friction lifting machine field.
Description
Technical Field
The utility model belongs to mine lifting means field, concretely relates to friction elevator wire rope antiskid arresting gear.
Background
The friction hoist is widely used in vertical shaft hoisting systems of mines such as coal, nonferrous metal, ferrous metal, nonmetal, chemical industry and the like, is used for hoisting minerals, materials, equipment, lifting personnel and the like, is throat equipment of the mine system, and is directly related to the safety production of the mine. The hoisting machine has the advantages of safety, reliability, small volume, light weight, large hoisting capacity, deep well hoisting and the like, and is widely applied to mine hoisting.
The friction hoist takes the motor as a power source to drive the friction wheel to rotate, and the lifting of the lifting container in the shaft is realized by utilizing the friction force. Specifically, a flexible body friction transmission principle is adopted, a steel wire rope is placed on a friction wheel of a friction hoist, and a heavy object or a person is hoisted or lowered by using dragging force generated by friction force between the steel wire rope and a friction liner. If the steel wire rope slides, that is, the speed of the steel wire rope is not consistent with the speed of the friction wheel, the steel wire rope and the friction lining of the friction wheel are abraded if the steel wire rope is light, and the cage is overwound, over-released, broken rope and dropped into the cage if the steel wire rope is heavy. Therefore, the slip phenomenon is not allowed to occur in any process of the friction lifting.
In actual operation, however, slippage often occurs due to several reasons.
1) Friction pad friction coefficient reduction: the friction force of the steel wire rope depends on the quality of the friction lining, if the friction lining with relatively poor quality is used or lubricating oil is coated on the friction lining, particularly in northern areas, after the floor type friction hoist works in winter and stops for a period of time, the friction lining of the head sheave can be frozen, so that the friction coefficient is reduced, and the friction coefficient between the steel wire rope and the lining is greatly reduced, and the rope sliding phenomenon is caused.
2) Loading oil on the steel wire rope: the surface of the wire rope core oil and the new steel wire rope without being coated with the friction grease are not cleaned and the sprayed surface friction grease amount is poor. Under the extremely severe condition in winter in the north, the temperature drops suddenly, so that the steel wire rope and the friction wheel are frozen to cause the phenomenon of rope sliding.
3) Overload: in the production process, in order to ensure the production capacity and the economic benefit of a mine, a plurality of mine enterprises, particularly small mines, artificially increase the hoisting weight of a hoisting machine, so that a hoisting cage works in an overload state for a long time, or the loads of cages at two ends are different greatly, and the static tension difference of a steel wire rope exceeds the limit value of friction force to generate a sliding rope.
4) Unreasonable operation: the slip rope accident is also easily caused by the mistake of a worker in the actual operation process, for example, when heavy objects are transported underground, the speed is too high, and when the heavy objects are lifted, the brake handle is opened in advance, so that the slip rope accident can be caused.
5) Rope adjusting device trouble: the rope adjusting device cannot play a role in adjusting the rope under the condition that the oil pressure is too low or the oil leaks, the rope cannot be effectively adjusted, the lengths of the steel wire ropes are different, the stress among the steel wire ropes is different, the shortest steel wire rope is stressed maximally and is not stressed in balance, the shortest steel wire rope causes certain sliding rope, and the field mainly appears when the cage is lifted or is about to finish.
According to the classical Euler transmission equation, the transmission force of the hoister under the normal lifting condition is smaller than the limit friction force provided by the winding drum, and once the five conditions occur, the difference value of the tension force of the hoister placed on the two sides of the winding drum is larger than the transmission friction force, which is the reason for the sliding of the steel wire rope. The research aiming at the sliding protection of the friction hoist is always the key research point for guaranteeing the lifting safety, because the research on an anti-sliding calculation method, the research on a braking system, the research on a friction liner and the related theoretical research are all focused on preventing the sliding or indirectly eliminating the sliding, the possibility of the sliding exists as long as friction transmission exists according to the analysis, meanwhile, the working condition of the lifting system is complex, the research on some theories is not deep and comprehensive enough, and the lifting speed is faster and faster along with the gradual increase of the lifting amount of the lifting system, and the sliding accident is inevitable. Once dangerous sliding accidents occur, no effective means exists at present, and field personnel can not stop the sliding of the steel wire rope except for braking the friction wheel by using a disc brake and only can let the steel wire rope slide. The wear of the steel wire rope and the reduction of the service life are caused if the steel wire rope is light, and the heavy accidents such as vehicle sliding and the like are caused if the steel wire rope is heavy.
Therefore, in order to solve the above problems, a new intelligent anti-slip technology for a steel wire rope of a friction hoist is needed to avoid safety accidents caused by rope slipping of the hoist and improve the operation safety of the friction hoist.
SUMMERY OF THE UTILITY MODEL
In order to solve the not enough of the dangerous smooth rope of wire rope appearing in the current friction lifting machine operation, the utility model provides a friction lifting machine wire rope antiskid arresting gear and anti-skidding method can effectively avoid the lifting machine to take place the incident that the smooth rope caused, improves friction lifting machine's operational safety nature, has realized the safety in production of mine friction formula lifting machine.
In order to solve the technical problem, the utility model discloses a technical scheme be: a friction hoist steel wire rope antiskid braking device comprises two brakes symmetrically arranged on two sides of a steel wire rope, wherein each brake comprises a rack, two swing arms, an electric push rod and a lining plate, wherein the two swing arms, the electric push rod and the lining plate are arranged on the rack; one end of the electric push rod is connected with the frame, and the other end of the electric push rod is connected with the lining plate.
And one surface of the anti-skid friction liner matched with the steel wire rope is a double-S-line curved surface.
And the center of the surface of the anti-skid friction liner is provided with a circular arc-shaped rope groove matched with the steel wire rope.
The anti-skid friction liner is made of high-strength wear-resistant environment-friendly materials.
The electric push rod is a servo linear motor or a pneumatic cylinder.
The anti-skid braking device for the steel wire rope of the friction hoist further comprises an electric control system, wherein the electric control system is used for outputting a signal to control the length of the electric push rod so as to control the torque between the anti-skid friction liner and the steel wire rope.
Furthermore, the anti-skid braking devices of the steel wire ropes of the friction hoist are arranged on two sides of the steel wire ropes on two sides of the friction wheel in pairs.
Compared with the prior art, the utility model following beneficial effect has:
the utility model provides a friction lifting machine wire rope antiskid arresting gear can come welt and the anti-skidding friction liner on the control arresting gear to draw close to the wire rope direction through control electric putter, presss from both sides tight wire rope gradually, makes arresting gear's friction liner and wire rope form friction braking force, prevents wire rope and slides, and its stable in structure has realized friction lifting machine's intelligent anti-skidding function effectively, because electric putter's easy controllability, the utility model discloses can the effective control friction torque, improve friction lifting machine wire rope antiskid's security.
Drawings
Fig. 1 is a schematic structural view of a steel wire rope anti-skid braking device of a friction hoist according to an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a top view of the slip resistant friction pad of FIG. 1;
fig. 4 is a schematic structural diagram of a steel wire rope anti-skid braking system of a friction hoist according to an embodiment of the present invention;
in the figure: 1-friction wheel, 2-guide wheel, 3-steel wire rope, 4-brake device, 5-electric control system, 7-lifting container, 8-tail rope, 10-speed sensor, 11-frame, 12-parallel four-bar linkage mechanism, 13-electric push rod, 14-anti-skid friction liner, 15-swing arm, 16-lining plate and 17-rope groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-2, the utility model provides a friction elevator wire rope antiskid arresting gear, including two brakes of symmetry setting in wire rope 3 both sides, the brake includes frame 11, sets up two swing arms 15, electric putter 13 and welt 16 on frame 11, the one end of two swing arms 15 is articulated with frame 11, and the other end is articulated with welt 16, two swing arms 15, frame 11 and welt 16 form parallel four-bar linkage 12, be provided with on welt 16 and be used for the antiskid friction liner 14 with wire rope 3 complex; one end of an electric push rod 13 is connected with the frame 11, and the other end of the electric push rod is connected with the lining plate 16 and used for pushing the lining plate 16 to move so as to control the moment between the anti-skid friction liner 14 and the steel wire rope.
Further, as shown in fig. 1, in this embodiment, a surface of the anti-skid friction pad 14, which is matched with the steel wire rope 3, is a double-S-line curved surface. Further, as shown in fig. 3, in the present embodiment, the center of the anti-skid friction pad 14 is provided with a circular arc-shaped rope groove 17 for matching with the steel wire rope 3. Further, in this embodiment, the anti-skid friction lining 14 is made of a high-strength wear-resistant environment-friendly material. In this embodiment, the frame 11 is installed on the ground, and the surface of the friction pad 14 is processed with a circular arc rope groove to ensure good surface contact between the steel wire rope and the friction pad. The double-S-shaped bending shape is selected to clamp the steel wire rope during braking and enable the steel wire rope to form double-S-shaped bending so as to generate damping braking on the steel wire rope, and the double-S-shaped bending generates larger braking force on the steel wire rope; meanwhile, if the steel wire rope moves from bottom to top, the clamping force for tightening the steel wire rope is increased by the pair of parallel four-bar linkage mechanisms 12 which are symmetrically arranged.
Further, in this embodiment, the electric push rod 13 is a servo linear motor. Further, in this embodiment, the electric push rod 13 may be replaced by a pneumatic cylinder. The servo motor device is replaced by a pneumatic cylinder, the brake working process of the steel wire rope can be completed, and the working principle is the same.
Further, the anti-skid braking device for the steel wire rope of the friction hoist provided by the embodiment further comprises an electric control system, wherein the electric control system is used for outputting a signal to control the length of the electric push rod 13 so as to control the torque between the anti-skid friction pad 14 and the steel wire rope 3. When a braking working signal sent by the electric control system 5 is received, a servo motor of the electric push rod 13 rotates in the forward and reverse directions and is converted into linear reciprocating motion through a lead screw device of the electric push rod, the parallel four-bar linkage mechanism 12 is pushed to reciprocate, double S-line curved surfaces on the parallel four-bar linkage mechanism 12 are made to synchronously reciprocate towards the direction of clamping the steel wire rope together with the friction liner 14, the braking device 4 applies friction resistance torque with linearly adjustable torque to the steel wire rope 3 through controlling the current of the servo motor, and closed-loop torque self-adaptive control is conveniently carried out on the sliding of the steel wire rope. The servo linear motor device with high-precision control and quick response performance is used as a power source of the steel wire rope braking working process, and the servo linear motor device is maintenance-free, quick in response and easy to realize intelligent control.
Furthermore, in this embodiment, a set of steel wire rope braking device 4 is respectively installed on the steel wire ropes 3 on two sides under each friction pulley, and eight sets of steel wire rope braking devices need to be installed on a commonly used four-rope friction hoist. The eight sets of steel wire rope braking devices are distributed and arranged and are arranged by the electric control system to work synchronously.
As shown in fig. 4, the present invention provides a schematic structural diagram of a steel wire rope anti-skid braking system for a friction hoist. In the braking system, a guide wheel 2 is arranged on one side of a steel wire rope 3 and is driven by the friction force of the steel wire rope 3 to rotate; the braking devices 4 are arranged on two sides of the steel wire rope 3 and are used for applying braking friction force to the steel wire rope 3; all be provided with speed sensor 10 on the connecting axle of friction wheel 1 and leading wheel 2, be used for measuring the speed signal of friction wheel 1 and leading wheel 2 respectively, speed sensor 10's output signal with electrical system 5 is connected, electrical system 5 is used for according to speed sensor 10's output signal, control arresting gear 4's braking torque.
Specifically, in the friction hoist, a plurality of hoisting steel wire ropes are placed on a friction lining with rope grooves on a friction wheel 1, the number of the steel wire ropes is the same as that of the friction wheel (4 wheels are commonly used), two hoisting containers 7 are respectively hung at the upper end and the lower end of a steel wire rope 3 and are connected below by a tail rope 8 for keeping the load balance of the steel wire ropes. The dead weight of the lifting container 7 and the weight of the lifting object generate downward pulling force on the friction wheel 1, so that the steel wire rope 3 is tightly pressed on the friction lining of the friction wheel 1. When the main motor of the driving hoister drives the friction wheel 1 to rotate forwards or reversely, a large friction force is generated between the steel wire rope 3 and the friction pad of the friction wheel 1, so that the steel wire rope 3 and the friction wheel 1 are in the same speed, and the lifting container 7 is driven to lift and descend materials along with different directions of the friction force.
Further, in the antiskid braking system, two speed sensors 10 are respectively mounted on the connecting shafts of the friction wheel 1 and the guide wheel 2 and used for acquiring speed signals of the two. The speed sensor 10 on the friction wheel 1 is coaxially connected with the friction wheel 1, the speed signal of the friction wheel 1 is collected, the guide wheel 2 is driven to rotate by the friction force of the steel wire rope, and the speed signal of the steel wire rope is collected by the speed sensor 10 on the guide wheel. If the two speeds are not consistent, the phenomenon that the steel wire rope slips is indicated. If the difference between the two signals exceeds the safe sliding range, the electric control system 5 controls the braking device 4 to rapidly draw close to the direction of the steel wire rope 3 and gradually clamp the steel wire rope 3, so that the steel wire rope bears friction resistance, and the rope sliding tendency of the steel wire rope is reduced until the elevator runs safely. If the rope sliding trend is continuously increased, the main machine of the lifting machine is safely braked and stopped, and meanwhile, the electric control system 5 controls the braking device 4 to clamp the steel wire rope 3 in a full-torque mode, so that the steel wire rope is subjected to the maximum friction resistance, and the steel wire rope is completely braked.
Further, in this embodiment, the electronic control system 5 is composed of a PLC programmable controller, a servo drive controller, an upper computer, a UPS, and various sensors, and is configured to control the electric push rod 13. When the system is in power failure, the UPS is provided to the equipment to supply short-time power, so that the equipment can supply short-time power when the power is cut off to complete the braking of the steel wire rope. The PLC realizes data acquisition, signal processing and system control, and the upper computer is used for monitoring and recording operation parameters and sending data to the equipment health management and fault diagnosis platform 6. When the system starts to work, the servo motor is started to push the electric push rod 13 to drive the parallel four-bar linkage mechanism 12 to work, a power source is provided for the whole steel wire rope braking system, the highest working braking torque of the system is controlled by the set servo motor current, the speed, the stroke and the torque of the parallel four-bar linkage mechanism 13 are controlled according to an electric signal sent by the electric control system 5, the stretching and the retracting of the anti-skid friction pad 14 relative to the steel wire rope are completed, and the closed-loop braking of the steel wire rope is realized. The embodiment of the utility model provides an in, speed and the two closed-loop process control of braking moment are unified to be controlled by electrical system 5, and PLC programmable controller requires according to control signal, and control servo drive device controls many servo motor work according to the design requirement, and its working parameter can show and record through the industrial computer to can realize long-range real time monitoring, satisfy the intelligent control requirement. The servo motor controller employs a microprocessor-based printed circuit board with additional software that allows communication between remote networks, with built-in bus support, and continuous monitoring of motor critical parameters (e.g., voltage, speed, force and temperature) can protect the actuator and machine by preventing movement beyond normal ranges. The built-in stroke end limit switch is installed in the actuator, ensuring smooth and repeatable operation and protecting the connecting equipment and the actuator.
Further, the utility model discloses except can using at mine hoisting machine equipment, also can use in elevator equipment, its braking theory of operation is unanimous with mine hoisting equipment, no longer describes.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (7)
1. The anti-skid braking device for the steel wire rope of the friction hoist is characterized by comprising two brakes symmetrically arranged on two sides of the steel wire rope (3), wherein each brake comprises a rack (11), two swing arms (15), an electric push rod (13) and a lining plate (16) which are arranged on the rack (11), one end of each swing arm (15) is hinged with the rack (11), the other end of each swing arm is hinged with the lining plate (16), the two swing arms (15), the rack (11) and the lining plate (16) form a parallel four-link mechanism (12), and anti-skid friction liners (14) matched with the steel wire rope (3) are arranged on the lining plates (16); one end of an electric push rod (13) is connected with the frame (11), and the other end of the electric push rod is connected with the lining plate (16).
2. A friction hoist steel wire rope anti-skid braking device as claimed in claim 1, characterized in that the surface of the anti-skid friction pad (14) that is engaged with the steel wire rope (3) is a double S-line curved surface.
3. A friction hoist steel wire rope anti-skid braking device according to claim 1, characterized in that the surface center of the anti-skid friction lining (14) is provided with circular arc shaped grooves for cooperating with the steel wire rope (3).
4. A friction hoist steel cord anti-slip braking device as claimed in claim 1, characterized in that said anti-slip friction lining (14) is made of high strength wear resistant environmental friendly material.
5. A friction hoist cable anti-skid brake as claimed in claim 1, characterized in that the electric push rod (13) is a servo linear motor or a pneumatic cylinder.
6. The anti-slip braking device for the steel wire rope of the friction hoist as claimed in claim 1, further comprising an electric control system for outputting a signal to control the length of the electric push rod (13) and further control the torque between the anti-slip friction pad (14) and the steel wire rope.
7. A friction hoist rope anti-slip braking device according to claim 1, characterized in that it is arranged in pairs on both sides of the rope (3) on both sides of the friction pulley (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020702518.0U CN212222083U (en) | 2020-04-30 | 2020-04-30 | Anti-skid braking device for steel wire rope of friction hoist |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020702518.0U CN212222083U (en) | 2020-04-30 | 2020-04-30 | Anti-skid braking device for steel wire rope of friction hoist |
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| CN212222083U true CN212222083U (en) | 2020-12-25 |
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| CN202020702518.0U Active CN212222083U (en) | 2020-04-30 | 2020-04-30 | Anti-skid braking device for steel wire rope of friction hoist |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112678643A (en) * | 2021-01-11 | 2021-04-20 | 安川双菱电梯有限公司 | Elevator overhauls protection safety device |
| CN112678642A (en) * | 2021-01-11 | 2021-04-20 | 安川双菱电梯有限公司 | Safety protection equipment for elevator maintenance |
-
2020
- 2020-04-30 CN CN202020702518.0U patent/CN212222083U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112678643A (en) * | 2021-01-11 | 2021-04-20 | 安川双菱电梯有限公司 | Elevator overhauls protection safety device |
| CN112678642A (en) * | 2021-01-11 | 2021-04-20 | 安川双菱电梯有限公司 | Safety protection equipment for elevator maintenance |
| CN112678642B (en) * | 2021-01-11 | 2022-04-08 | 安川双菱电梯有限公司 | Safety protection equipment for elevator maintenance |
| CN112678643B (en) * | 2021-01-11 | 2022-04-12 | 安川双菱电梯有限公司 | Elevator overhauls protection safety device |
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