CN216190635U - Prevent cracked electric block of wire rope - Google Patents
Prevent cracked electric block of wire rope Download PDFInfo
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- CN216190635U CN216190635U CN202120656122.1U CN202120656122U CN216190635U CN 216190635 U CN216190635 U CN 216190635U CN 202120656122 U CN202120656122 U CN 202120656122U CN 216190635 U CN216190635 U CN 216190635U
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- wire rope
- steel wire
- movable pulley
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Abstract
The utility model discloses an electric hoist capable of preventing a steel wire rope from being broken, which comprises a steel wire rope reel, a motor for driving the steel wire rope reel, a fixed pulley block, a movable pulley block, an end plate, a hook group and a steel wire rope, wherein the steel wire rope penetrates through the movable pulley block, two ends of the steel wire rope are respectively fixed on the steel wire rope reel and the fixed pulley block, a tension sensor is arranged at the joint of the fixed pulley block and the steel wire rope, a safety protection device is arranged below the contact part of each movable pulley of the movable pulley block and the steel wire rope, and the motor and the tension sensor are both electrically connected with an electric hoist controller main body. The tension sensor is arranged at the joint of the fixed pulley and the steel wire rope, when the steel wire rope is locked on the movable pulley under the action of the safety protection device, the output power of the tension sensor and the output power of the motor are utilized to calculate the tolerance range of the tension values of the steel wire ropes on the two sides of the movable pulley block, so that the abnormal condition of the steel wire rope is judged, and corresponding measures are taken.
Description
Technical Field
The utility model relates to an electric hoist capable of preventing a steel wire rope from being broken, and belongs to the technical field of electric hoists.
Background
The steel wire rope movable pulley block achieves the purpose of speed reduction and labor saving by means of rotation of a steel wire rope which penetrates through the steel wire rope, meanwhile, a hoisting heavy object can be driven to slide up and down, the tension of two steel wire ropes of the same pulley is basically the same in a bearing mode, and only in the motion process, the tension of the power side is slightly larger so as to overcome the rotation phenomenon caused by the friction force of the pulley block.
When the steel wire rope is broken, the tension of the steel wire rope on one side of the pulley tends to zero instantly, the steel wire rope rapidly slides out of the pulley under the tension operation of the steel wire rope on the other side, and a heavy object hung on the pulley block falls to cause an accident. Most of the damages are the safety problems that the yarn is broken and loosened, the strands are loosened or the strands are twisted and then broken, and the like
In order to prevent safety accidents caused by breakage of the steel wire rope, the anti-safety protection device is arranged on the movable pulley block, and the steel wire rope for the crane generally has a safety factor which is close to more than 5 times, so that when the steel wire rope is broken, as long as the anti-safety protection device plays a role, goods on the lifting hook still cannot fall off in a short time.
But can play the guard action in order to guarantee to prevent the safety arrangement, can be higher its sensitivity adjustment usually, but under this condition, because its sensitivity is higher relatively, in case the electric block receives the collision of foreign object or when acutely rocking, prevent that the safety arrangement triggers by mistake easily, lead to follow-up loaded down with trivial details operation, for example carry out manual maintenance to the electric block, reset and prevent safety arrangement etc..
Disclosure of Invention
The utility model aims to solve the technical problem of providing an electric block for preventing a steel wire rope from being broken, wherein a tension sensor is arranged at the joint of a fixed pulley and the steel wire rope, when the steel wire rope is locked on a movable pulley under the action of a safety protection device, the tolerance range of the tension values of the steel wire rope on two sides of the movable pulley block is calculated by utilizing the output power of the tension sensor and a motor, so that the abnormal condition of the steel wire rope is judged, and corresponding measures are taken.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
the utility model provides a prevent cracked electric block of wire rope, includes the wire rope reel, is used for the drive motor, the fixed pulley group, the running block, end plate, the hook group of wire rope reel and pass the wire rope on wire rope reel and fixed pulley group is fixed respectively at running block, both ends, the fixed pulley group is provided with force sensor with wire rope's junction, each running pulley of running block all is provided with safety arrangement with the below of wire rope contact site, motor and force sensor all with electric block controller main part electrical connection.
The electric hoist capable of preventing the steel wire rope from being broken is characterized in that: safety arrangement includes that at least a set of symmetry sets up first locking mechanism of movable pulley below, first locking mechanism includes rotatable first linkage rod, the one end setting of first linkage rod is in the below of movable pulley, the other end are connected with the carousel, one side of carousel is provided with the fixed plate, be connected with its gliding locking piece relatively on the fixed plate, be provided with on the carousel with locking piece contacts, be used for promoting locking piece gliding locating pin, the chain connecting rod of fixedly connected with between two carousels.
The electric hoist capable of preventing the steel wire rope from being broken is characterized in that: and second locking mechanisms are further arranged on two sides of the central axis of the movable pulley and comprise a rotatable second linkage rod, one end of the second linkage rod is arranged below the movable pulley, and the other end of the second linkage rod is connected with one of the turntables through a connecting rod.
The electric hoist capable of preventing the steel wire rope from being broken is characterized in that: the surface of the locking block is provided with a sawtooth key.
The electric hoist capable of preventing the steel wire rope from being broken is characterized in that: a tension spring is arranged between the locking block and the fixing plate.
The electric hoist capable of preventing the steel wire rope from being broken is characterized in that: and the second interlocking rods of the two second locking mechanisms are connected with the second interlocking rod fixing seat through a second rotating shaft.
The electric hoist capable of preventing the steel wire rope from being broken is characterized in that: the movable pulley block comprises two movable pulleys, and a first linkage rod of a first locking mechanism on the same side below each movable pulley is connected with the rotary table on the same side; and a second linkage rod of the second locking mechanism at the same side is connected with the turntable at the other side through a connecting rod.
The electric hoist capable of preventing the steel wire rope from being broken is characterized in that: the first linkage rod fixing seat and the fixing plate which are fixedly connected to the first linkage rod are fixed to the end plates, and the rotary disc is arranged between the end plates through corresponding third rotating shafts.
The electric hoist capable of preventing the steel wire rope from being broken is characterized in that: and the joint of the two turntables and the interlocking connecting rod is provided with an installation sinking groove.
A safety protection method for an electric hoist capable of preventing a steel wire rope from being broken comprises the following steps: the method comprises the following steps:
(1) setting tolerance ranges of the tension values of the steel wire ropes on two sides of the movable pulley block under three conditions in the operation process of the electric hoist:
tolerance range in normal operation: 0-D1;
tolerance range in which the steel wire rope is abnormal but can still run: D1-D2;
tolerance range when the steel wire rope is abnormal and cannot normally run: greater than D2;
(2) collecting the output power of a motor in real time, calculating the tension value of a steel wire rope at the side connected with a steel wire rope drum through a power algorithm, and comparing the tension value with the tension value collected by a fixed pulley side tension sensor in real time;
(3) when the tolerance of the two tension values in the step (3) is between 0 and D1, the electric hoist normally runs, when the tolerance of the two tension values is between D1 and D2, the electric hoist locks the steel wire rope through the safety protection device and gives an alarm, a worker can immediately stop running the electric hoist or control the steel wire rope winding drum to reversely rotate for a certain distance, then the safety protection device is unlocked, and the electric hoist continues to run; when the tolerance of the two tension values is larger than D2, the electric hoist locks the steel wire rope through the safety protection device and gives an alarm, and a worker must stop operating the electric hoist and cannot unlock the safety protection device by controlling the steel wire rope winding drum to rotate reversely.
The utility model has the beneficial effects that:
1. by arranging the tension sensor at the joint of the fixed pulley and the steel wire rope, when the steel wire rope is locked on the movable pulley under the action of the safety protection device, the tolerance range of the tension values of the steel wire ropes on the two sides of the movable pulley block is calculated by utilizing the output power of the tension sensor and the motor, so that the abnormal condition of the steel wire rope is judged, and corresponding measures are taken;
2. the first locking mechanisms are symmetrically arranged below the movable pulley, so that the first linkage rod of the first locking mechanism is triggered to press downwards no matter the movable pulley rotates forwards or backwards, as long as the steel wire has the phenomena of wire breakage, wire loosening and strand loosening, and twisting or breaking among strands, the rotary table is driven to rotate, the locking block moves upwards, the steel wire rope is locked on the movable pulley by using friction force generated by the locking block, and the movable pulley block is prevented from falling off from the steel wire rope, so that safety accidents are avoided;
3. through connecting chain connecting rod before two carousels, as long as the carousel of one of them side is driven, then can drive the synchronous rotation of carousel of opposite side, thereby drive the locking piece of this side and die the wire rope lock at the running pulley group, avoid the emergence of incident, and through getting up the back with two carousels linkage, in case the electric block host computer judges that safety arrangement's start-up belongs to the spurious triggering, but not the fracture of wire rope arouses, can reset safety arrangement through the mode of reverse rotation wire rope reel, remove the lock dead state, make electric block continue normal work.
Drawings
FIG. 1 is a schematic structural diagram of an electric hoist for preventing a steel wire rope from being broken according to the utility model;
fig. 2 is a schematic structural diagram of a safety protection device of an electric block for preventing a steel wire rope from being broken according to the present invention;
fig. 3 is a schematic structural diagram of a first linkage rod of the electric hoist for preventing the breakage of the steel wire rope according to the utility model;
fig. 4 is a schematic structural diagram of a second linkage rod of the electric block for preventing the steel wire rope from being broken according to the present invention.
Detailed Description
The utility model will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 4, the electric hoist for preventing the breakage of the steel wire rope comprises a steel wire rope reel 6, a motor for driving the steel wire rope reel 6, a fixed pulley block 7, a movable pulley block 1, an end plate 3, a hook group 5 and a steel wire rope 2 which penetrates through the movable pulley block 1 and is fixed at two ends of the steel wire rope reel 6 and the fixed pulley block 7 respectively, wherein a tension sensor is arranged at the joint of the fixed pulley block 7 and the steel wire rope, a safety protection device 4 is arranged below the contact part of each movable pulley of the movable pulley block 1 and the steel wire rope, and the motor and the tension sensor are both electrically connected with an electric hoist controller main body.
The tension sensor is arranged at the joint of the fixed pulley and the steel wire rope, when the steel wire rope is locked on the movable pulley under the action of the safety protection device, the output power of the tension sensor and the output power of the motor are utilized to calculate the tolerance range of the tension values of the steel wire ropes on the two sides of the movable pulley block, so that the abnormal condition of the steel wire rope is judged, and corresponding measures are taken. Under the normal condition, the pulling force value of movable pulley both sides wire rope is almost equivalent, when the fracture condition appears in wire rope, the wire rope pulling force of one of them side of movable pulley can tend to zero in the twinkling of an eye, and opposite side wire rope pulling force can become original twice almost, driving motor's output through the wire rope reel, can utilize the convenient pulling force of calculating this side wire rope of power law, when safety arrangement locks the wire rope dead appearing, can pass through the pulling force value of comparison both sides, the judgement is that wire rope fracture or wire rope appear the pine strand, the broken string, unusual phenomena such as distortion or safety arrangement's spurious triggering, thereby make things convenient for the on-the-spot operation personnel to take corresponding measure.
Through set up a set of first locking mechanism in the below symmetry of movable pulley, no matter at the in-process of movable pulley corotation or reversal, as long as the steel wire appears disconnected silk, the pine silk is loose strand, intertwist distortion or cracked when unusual, when unusual position was through first trace 10, can contact with it and push down its tip that contacts to drive the other end and shift up, drive the carousel 11 that is connected with it and rotate, thereby utilize locating pin 111 on the carousel 11 to promote the sliding of locking piece 13 relative fixed plate 12 to the movable pulley direction, until die the wire rope lock on the fixed pulley, avoid the movable pulley group to drop from the wire rope, take place the incident.
Meanwhile, the two turntables 11 are linked, so long as the turntable on one side is driven, the turntable on the other side can be driven to synchronously rotate, and therefore the locking block is driven to lock the steel wire rope on the movable pulley block, and safety accidents are avoided. When the steel wire rope rotates anticlockwise, the steel wire rope above the first locking mechanism on the left side in fig. 3 has an abnormal phenomenon, when an abnormal part passes through the first linkage rod on the left side, the first linkage rod is triggered to act, so that the turntables on the two sides are driven to rotate synchronously, but because the steel wire rope continues to rotate anticlockwise for a short distance before being locked, the friction force generated at the moment when the locking block on the left side contacts with the steel wire rope drives the locking block to slide downwards, so that the locking block on the side cannot lock the steel wire rope on the movable pulley and can be released once contacting, and because the tension spring 19 is arranged between the locking block 13 and the fixed plate 12, the locking block can be quickly reset under the action of the tension spring; and the friction force generated by the right locking block at the moment of contact with the steel wire rope can drive the side locking block to move upwards, and the more contact friction force is larger, so that the two blocks can be instantly locked under the action of the steel wire rope as long as the two blocks are just in contact, and the more the locking is. Therefore, if there is no interlocking link 30, when the wire rope rotates counterclockwise, it can be locked only when the abnormal portion of the wire rope rotates to the first locking mechanism on the right side, and the same applies to clockwise rotation. Therefore, after the two turntables 11 are linked, the steel wire rope can be locked in advance, and the reliability of the safety protection device is improved.
Meanwhile, the structure of the safety protection device can also ensure that under the condition that the host machine of the electric hoist judges that the starting of the safety protection device belongs to false triggering, because the locking block on one side is reset, a worker can reset the locking block locked on the other side only by controlling the motor to rotate reversely for a short distance, so that the whole safety protection device unlocks the steel wire rope, and the electric hoist can be continuously used normally.
And second locking mechanisms are further arranged on two sides of the central axis of the movable pulley and comprise a rotatable second linkage rod 20, one end of the second linkage rod 20 is arranged below the movable pulley, and the other end of the second linkage rod is connected with one of the turntables 11 through a connecting rod 22.
When the steel wire rope is broken between the two first locking mechanisms, the second linkage rod on the left side can drive the locking block on the right side to slide to lock the steel wire rope, and the effect of locking the steel wire rope in advance can be achieved.
In the embodiment, two groups of locking mechanisms are arranged below each movable pulley, and in the actual production process, a plurality of groups of locking mechanisms are arranged below the part of the movable pulley, which is in contact with the steel wire rope, according to the actual size of the movable pulley, so that the running reliability of the equipment is improved.
The surface of the locking block 13 is provided with a sawtooth key, and when the locking block 13 is in contact with the steel wire rope, the friction force between the locking block and the steel wire rope can be increased through the sawtooth key on the surface of the locking block, so that the locking effect is ensured.
The locking block 13 and the fixed plate 12 are provided with the tension spring 19 therebetween, and a small pulling force is applied to the locking block 13 under the action of the tension spring 19, so that the locking block 13 is prevented from sliding relative to the fixed plate 12 due to vibration, collision and the like in the operation process of the equipment, and triggering is avoided, and the possibility of error signals is avoided.
The second interlocking rods 20 of the two second locking mechanisms are connected to a second interlocking rod fixing seat 24 through a second rotating shaft 21, the movable pulley block 1 comprises two movable pulleys, and the first interlocking rod 10 of the first locking mechanism on the same side below each movable pulley is connected with the rotating disc 11 on the same side; the second linkage 20 of the second locking mechanism on the same side is connected with the turntable on the other side through the connecting rod 22. The first linkage rod fixing seat and the fixing plate 12 fixedly connected to the first linkage rod 10 are fixed to the end plates 3, and the rotary disc 11 is arranged between the end plates 3 through respective corresponding third rotating shafts.
Two turntables 11 with the junction of interlocking connecting rod 30 is provided with the installation heavy groove, through interlocking connecting rod 30 and the linkage of adjacent carousel, because its interlocking connecting rod only need arrange in the carousel unilateral, consequently process out the heavy groove installation on the carousel and link the connecting rod in order to avoid the space to interfere, optimize retrencies to reduce its structure.
A safety protection method for an electric hoist capable of preventing a steel wire rope from being broken comprises the following steps: the method comprises the following steps:
(1) setting tolerance ranges of the tension values of the steel wire ropes on two sides of the movable pulley block under three conditions in the operation process of the electric hoist:
tolerance range in normal operation: 0-D1;
tolerance range in which the steel wire rope is abnormal but can still run: D1-D2;
tolerance range when the steel wire rope is abnormal and cannot normally run: greater than D2;
(2) collecting the output power of a motor in real time, calculating the tension value of a steel wire rope at the side connected with a steel wire rope drum through a power algorithm, and comparing the tension value with the tension value collected by a fixed pulley side tension sensor in real time;
(3) when the tolerance of the two tension values in the step (3) is between 0 and D1, the electric hoist normally runs, when the tolerance of the two tension values is between D1 and D2, the electric hoist locks the steel wire rope through the safety protection device and gives an alarm, a worker can immediately stop running the electric hoist or control the steel wire rope winding drum to reversely rotate for a certain distance, then the safety protection device is unlocked, and the electric hoist continues to run; when the tolerance of the two tension values is larger than D2, it is shown that the wire breakage or strand loosening of the steel wire rope is serious, even the breakage occurs, the electric hoist locks the steel wire rope through the safety protection device and gives an alarm, a worker must stop operating the electric hoist and cannot unlock the safety protection device by controlling the reverse rotation of the steel wire rope reel, and under the condition that the steel wire rope is broken, even if the worker continues to operate the steel wire rope reel to rotate reversely, the safety protection device cannot be unlocked, and the safety is improved.
In summary, according to the electric hoist for preventing the breakage of the steel wire rope, the tension sensor is arranged at the connecting position of the fixed pulley and the steel wire rope, when the steel wire rope is locked on the movable pulley under the action of the safety protection device, the tolerance range of the tension values of the steel wire rope on two sides of the movable pulley block is calculated by utilizing the output power of the tension sensor and the output power of the motor, so that the abnormal condition of the steel wire rope is judged, and corresponding measures are taken.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a prevent cracked electric block of wire rope, includes wire rope reel (6), is used for the drive motor, fixed pulley group (7), running block (1), end plate (3), lifting hook group (5) of wire rope reel (6) and pass wire rope (2) on wire rope reel (6) and fixed pulley group (7), its characterized in that are fixed respectively at both ends of running block (1): the safety protection device is characterized in that a tension sensor is arranged at the joint of the fixed pulley block (7) and the steel wire rope, a safety protection device (4) is arranged below the contact part of each movable pulley of the movable pulley block (1) and the steel wire rope, and the motor and the tension sensor are electrically connected with the electric hoist controller main body.
2. The electric block for preventing the breakage of the steel wire rope according to claim 1, characterized in that: safety arrangement (4) set up including at least a set of symmetry the first locking mechanism of movable pulley below, first locking mechanism includes rotatable first linkage rod (10), the one end setting of first linkage rod (10) is in the below of movable pulley, the other end are connected with carousel (11), one side of carousel (11) is provided with fixed plate (12), be connected with its gliding locking piece (13) relatively on fixed plate (12), be provided with on carousel (11) with locking piece (13) contact, be used for promoting locking piece (13) gliding locating pin (111), fixedly connected with interlocking connecting rod (30) between two carousel (11).
3. The electric block for preventing the breakage of the steel wire rope according to claim 2, characterized in that: and second locking mechanisms are further arranged on two sides of the central axis of the movable pulley and comprise a rotatable second linkage rod (20), one end of the second linkage rod (20) is arranged below the movable pulley, and the other end of the second linkage rod is connected with one of the turntables (11) through a connecting rod (22).
4. The electric block for preventing the breakage of the steel wire rope according to claim 3, wherein: the surface of the locking block (13) is provided with a sawtooth key.
5. The electric block for preventing the breakage of the steel wire rope according to claim 4, wherein: a tension spring (19) is arranged between the locking block (13) and the fixing plate (12).
6. The electric block for preventing the breakage of the steel wire rope according to claim 5, wherein: and the second linkage rods (20) of the two second locking mechanisms are connected with a second linkage rod fixing seat (24) through a second rotating shaft (21).
7. The electric block for preventing the breakage of the steel wire rope according to claim 6, wherein: the movable pulley block (1) comprises two movable pulleys, and a first linkage rod (10) of a first locking mechanism on the same side below each movable pulley is connected with a rotary table (11) on the same side; and a second linkage rod (20) of the second locking mechanism at the same side is connected with the rotary disc at the other side through a connecting rod (22).
8. The electric block for preventing the breakage of the steel wire rope according to claim 7, wherein: the first linkage rod fixing seat and the fixing plate (12) which are fixedly connected to the first linkage rod (10) are fixed to the end plates (3), and the rotary disc (11) is arranged between the end plates (3) through corresponding third rotary shafts.
9. The electric block for preventing the breakage of the steel wire rope according to claim 2, characterized in that: and a mounting sink groove is formed at the joint of the two turntables (11) and the interlocking connecting rod (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120656122.1U CN216190635U (en) | 2021-03-31 | 2021-03-31 | Prevent cracked electric block of wire rope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120656122.1U CN216190635U (en) | 2021-03-31 | 2021-03-31 | Prevent cracked electric block of wire rope |
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| Publication Number | Publication Date |
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| CN216190635U true CN216190635U (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120656122.1U Active CN216190635U (en) | 2021-03-31 | 2021-03-31 | Prevent cracked electric block of wire rope |
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| CN (1) | CN216190635U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112960580A (en) * | 2021-03-31 | 2021-06-15 | 冠亚机械工业（昆山）有限公司 | Electric hoist capable of preventing steel wire rope from being broken and safety protection method thereof |
-
2021
- 2021-03-31 CN CN202120656122.1U patent/CN216190635U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112960580A (en) * | 2021-03-31 | 2021-06-15 | 冠亚机械工业（昆山）有限公司 | Electric hoist capable of preventing steel wire rope from being broken and safety protection method thereof |
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