CN220723362U - Safety device for crane - Google Patents
Safety device for crane Download PDFInfo
- Publication number
- CN220723362U CN220723362U CN202322463927.6U CN202322463927U CN220723362U CN 220723362 U CN220723362 U CN 220723362U CN 202322463927 U CN202322463927 U CN 202322463927U CN 220723362 U CN220723362 U CN 220723362U
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- China
- Prior art keywords
- wire rope
- crane
- safety device
- photoelectric switch
- steel wire
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 239000000956 alloy Substances 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 238000004804 winding Methods 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001234 light alloy Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Jib Cranes (AREA)
Abstract
The utility model relates to the technical field of cranes, in particular to a safety device for a crane, which comprises a lifting weight limiter fixed on a steel wire rope and a fixed seat fixed on the side of the steel wire rope, wherein one side of the lifting weight limiter is fixedly connected with one end of a first cross rod, the other end of the first cross rod is fixedly connected with a connecting piece, the fixed seat is connected with one end of an elastic rope, the other end of the elastic rope is fixedly connected with the connecting piece, the bottom of the connecting piece is hinged with a first vertical rod, the bottom of the first vertical rod is provided with a photoelectric switch, the emitting end of the photoelectric switch faces downwards vertically, a reflecting plate is arranged under the photoelectric switch, a light shielding plate is arranged between the photoelectric switch and the reflecting plate, a through hole for light to pass is formed in the light shielding plate, and the side part of the light shielding plate is connected with the steel wire rope through a second cross rod and inclines along with the inclination of the steel wire rope. When the oblique lifting condition occurs, the utility model plays a role in protecting, avoids the occurrence of safety accidents, and reduces the abrasion of the steel wire rope, the winding drum and the pulley.
Description
Technical Field
The utility model relates to the technical field of cranes, in particular to a safety device for a crane.
Background
The accident probability caused by the inclined crane is large, the inclined crane generates transverse component force, once the weight is separated from the ground and loses the constraint of the ground friction force, the weight can violently swing along the transverse component force direction, people or objects can be collided, and the accident can occur, so that the inclined crane is an important subject. The existing hoisting machinery is not provided with a inclined pull inclined crane safety device when going out, so that the safety of the crane cannot be well guaranteed, in addition, the inclined pull inclined crane can aggravate the abrasion of a steel wire rope, a winding drum and a pulley, the service life of the crane is shortened, and the steel wire rope can be possibly pulled out of a winding drum rope groove to cause accidents.
Disclosure of Invention
The utility model aims to provide a safety device for a crane, which can solve the technical problems.
The utility model provides a safety device for a crane, which comprises a lifting weight limiter fixed on a steel wire rope and a fixed seat fixed on the side of the steel wire rope, wherein one side of the lifting weight limiter is fixedly connected with one end of a first cross rod, the other end of the first cross rod is fixedly connected with a connecting piece, the fixed seat is connected with one end of an elastic rope, the other end of the elastic rope is fixedly connected with the connecting piece, the bottom of the connecting piece is hinged with a first vertical rod, the bottom of the first vertical rod is provided with a photoelectric switch, the emitting end of the photoelectric switch is vertically downward, a reflecting plate is arranged under the photoelectric switch, a light shielding plate is arranged between the photoelectric switch and the reflecting plate, a through hole for light to pass is formed in the light shielding plate, and the side part of the light shielding plate is connected with the steel wire rope through a second cross rod and inclines along with the inclination of the steel wire rope.
Further, the fixed seat is a switch type magnetic seat and is adsorbed on a crane metal mechanism.
Further, the reflecting plate is connected with the first vertical rod through an arc rod piece, one end of the arc rod piece is fixedly connected with the reflecting plate, and the other end of the arc rod piece is connected with the lower portion of the first vertical rod.
Further, the light shielding plate is an annular light shielding plate and can be replaced by light shielding plates with different sizes according to field conditions, so that the maximum inclination amplitude of the steel wire rope is set.
Further, the end part of the second cross rod is connected with the steel wire rope through a nylon ring or a rubber ring, a second vertical rod is arranged between the second cross rod and the first cross rod, and two ends of the second vertical rod are fixedly connected with the second cross rod and the first cross rod respectively.
Further, the first vertical rod and the second vertical rod are telescopic rods, and the telescopic length can be adjusted according to the lifting height of the crane, so that the maximum inclination amplitude of the steel wire rope is set.
Further, the telescopic link includes outer tube and inner tube, the outer tube is hollow pipe and internal diameter more than or equal to the external diameter of inner tube, the outer tube slip cap is established the outside of inner tube, be equipped with the screw hole on the lateral wall of outer tube, threaded hole threaded connection has the bolt, and the tip butt of bolt screw rod is in on the outer wall of inner tube.
Further, the first cross rod, the second cross rod, the first vertical rod and the second vertical rod are all made of light alloy materials.
The beneficial effects are that:
according to the utility model, the cross rod connected with the steel wire rope is arranged, and the light shielding plate is arranged at one end of the cross rod, so that when the oblique lifting occurs, the steel wire rope inclines to drive the cross rod and the light shielding plate to displace, and when the light shielding plate shields the transmitting and receiving paths of light rays, the photoelectric switch acts and cuts off the upward lifting circuit of the crane, so that the protection effect is realized, the safety accident is avoided, and the abrasion of the steel wire rope, the winding drum and the pulley is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic diagram showing the connection relationship between the connecting piece and the first vertical rod in the present utility model;
FIG. 3 is a schematic view of a telescopic rod according to the present utility model;
fig. 4 is a schematic diagram of the present utility model for illustrating a planar structure and a working process.
Reference numerals illustrate: 1-lifting weight limiter, 101-wire rope, 2-fixing base, 3-first horizontal pole, 301-outer tube, 302-inner tube, 303-bolt, 4-connecting piece, 401-lug, 402-round pin axle, 5-elastic rope, 6-first montant, 7-photoelectric switch, 8-reflecting plate, 9-light screen, 10-through-hole, 11-second horizontal pole, 12-second montant, 13-rubber ring, 14-arc member.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Example 1
The safety device for the crane comprises a lifting weight limiter 1 fixed on a steel wire rope 101 and a fixed seat 2 fixed on the side of the steel wire rope 101, wherein the steel wire rope 101 is a steel wire rope of a crane hook for hanging objects, and the lifting weight limiter 1 is a lifting mechanical safety protection device and is specially used for electric hoist single-double beam cranes of various types and specifications. The device has the functions of acoustic alarm, immediate alarm, cutting off the loop of the lifting motor of the crane, displaying the weight of the lifting weight and the like, and can avoid equipment and personal accidents caused by overload of lifting equipment. The fixing seat 2 is a switch type magnetic seat, can be conveniently adsorbed on an iron object, such as a bridge frame and an electric hoist, and forms a fixed connection relationship, or can be fixed on the bridge frame through bolts.
One side fixedly connected with first horizontal pole 3 of lifting weight limiter 1, the other end fixedly connected with connecting piece 4 of first horizontal pole 3, fixing base 2 is connected with the one end of elastic cord 5, the other end and the connecting piece 4 fixed connection of elastic cord 5 (elastic cord can take the bonding or be equipped with the buckle on the connecting piece, elastic cord winding accomplishes fixed connection on the buckle), the bottom of connecting piece 4 articulates there is first montant 6, specifically, the bottom of connecting piece 4 and the top of first montant 6 are equipped with lug 401 respectively, round pin axle 402 passes two lugs in proper order and forms articulated relation. The bottom of first montant 6 is equipped with photoelectric switch 7, and photoelectric switch 7's transmitting end is vertical down, and photoelectric switch also collects transmitter and receiver in an organic whole, and the light that photoelectric switch transmitter sent is through the reflecting plate, and the reflection is back to the receiver, and when the detected object passed through and the light of blocking completely, photoelectric switch just produced the detection switch signal.
A reflecting plate 8 is arranged right below the photoelectric switch 7, the reflecting plate 8 is connected with the first vertical rod 6 through an arc rod piece 14, one end of the arc rod piece 14 is bonded with the reflecting plate 8, and the other end is welded with the lower part of the first vertical rod 6. An annular light shielding plate 9 is arranged between the photoelectric switch 7 and the reflecting plate 8, a through hole 10 for light to pass through is arranged in the middle of the light shielding plate 9, the end part of the second cross rod 11 is connected with the steel wire rope 101 through a rubber ring 13, namely the rubber ring 13 is fixedly sleeved on the steel wire rope 101, the acting force on the steel wire rope can be effectively prevented from being as small as possible, and the numerical value of the lifting weight limiter 1 is prevented from being inaccurate. A second vertical rod 12 is arranged between the second cross rod 11 and the first cross rod 3, two ends of the second vertical rod 12 are welded with the second cross rod 11 and the first cross rod 3 respectively, and the second cross rod 11 inclines along with the inclination of the steel wire rope 101.
In addition, the first vertical rod 6 and the second vertical rod 12 are telescopic rods, each telescopic rod comprises an outer tube 301 and an inner tube 302, the outer tube 301 is a hollow circular tube, the inner diameter of the outer tube is equal to or larger than the outer diameter of the inner tube 302, the outer tube 301 is slidably sleeved on the outer side of the inner tube 302, threaded holes are formed in the side wall of the outer tube 301, bolts 303 are connected in the threaded holes in a threaded mode, and the end portions of the bolts 303 are abutted to the outer wall of the inner tube 302. The telescopic rod can enable a user to adjust the position relation of each component by combining the situations of the site.
The first cross rod 3, the second cross rod 11, the first vertical rod 6 and the second vertical rod 12 are made of light alloy materials, such as aluminum alloy, magnesium alloy and the like, so that the situation that the lifting force limiter is not accurately measured due to the weight of a part is prevented.
The utility model also comprises a control circuit board which is connected in series with the control circuit of the jack, can identify overload and deflection states through electric components, feeds back to the display screen, and cuts off the ascending power supply of the crane under critical conditions.
The working and using processes are as follows:
when the crane is inclined and pulled to be inclined due to improper operation, the steel wire rope 101 of the crane deflects to drive the second cross rod 11 and the annular light shielding plate 9 to move, the first vertical rod 3 can be relatively kept vertical due to the influence of self weight and articulation, after the steel wire rope 101 deflects to a certain degree, light rays emitted by the emitting end of the photoelectric switch 7 are blocked by the outer edge of the through hole 10 on the annular light shielding plate 9, the photoelectric switch acts, the display screen alarms and cuts off a circuit of lifting the crane upwards, and a protection effect is achieved when the inclined and pulled to be inclined and lifted condition occurs. In addition, according to the lifting height of the crane, the lengths of the first vertical rod and the second vertical rod and/or the light shielding plates of through holes with different sizes are/is adjusted, so that the maximum inclination amplitude of the steel wire rope is set.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (8)
1. The utility model provides a safety device for hoist, its characterized in that, including fixing the lifting weight limiter on wire rope and fixing the fixing base in wire rope side, one side fixedly connected with first horizontal pole of lifting weight limiter's one end, the other end fixedly connected with connecting piece of first horizontal pole, the fixing base is connected in the one end of elastic rope, the other end of elastic rope with connecting piece fixed connection, the bottom of connecting piece articulates there is first montant, the bottom of first montant is equipped with photoelectric switch, and photoelectric switch's transmitting end is vertical down, be equipped with the reflecting plate under the photoelectric switch, photoelectric switch with be equipped with the light screen between the reflecting plate, be equipped with the through-hole that is used for the light to pass through on the light screen, the lateral part of light screen pass through the second horizontal pole with wire rope is connected and inclines along with wire rope's slope.
2. The safety device for a crane according to claim 1, wherein the fixed seat is a switch type magnetic seat and is adsorbed on a metal mechanism of the crane.
3. The safety device for a crane according to claim 1, wherein the reflecting plate is connected to the first vertical rod through an arc-shaped rod, one end of the arc-shaped rod is fixedly connected to the reflecting plate, and the other end is connected to the lower portion of the first vertical rod.
4. The safety arrangement for a crane according to claim 1, wherein the shade is an annular shade.
5. The safety device for the crane according to claim 1, wherein the end part of the second cross bar is connected with the steel wire rope through a nylon ring or a rubber ring, a second vertical bar is arranged between the second cross bar and the first cross bar, and two ends of the second vertical bar are fixedly connected with the second cross bar and the first cross bar respectively.
6. The safety device for a crane of claim 5, wherein the first and second vertical bars are telescoping bars.
7. The safety device for a crane according to claim 6, wherein the telescopic rod comprises an outer tube and an inner tube, the outer tube is a hollow circular tube and has an inner diameter equal to or larger than the outer diameter of the inner tube, the outer tube is slidably sleeved on the outer side of the inner tube, a threaded hole is formed in the side wall of the outer tube, a bolt is connected in the threaded hole in a threaded manner, and the end portion of the bolt is abutted to the outer wall of the inner tube.
8. The safety device for a crane of claim 7, wherein the first cross bar, the second cross bar, the first vertical bar, and the second vertical bar are all made of a lightweight alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322463927.6U CN220723362U (en) | 2023-09-11 | 2023-09-11 | Safety device for crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322463927.6U CN220723362U (en) | 2023-09-11 | 2023-09-11 | Safety device for crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220723362U true CN220723362U (en) | 2024-04-05 |
Family
ID=90490563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322463927.6U Active CN220723362U (en) | 2023-09-11 | 2023-09-11 | Safety device for crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220723362U (en) |
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2023
- 2023-09-11 CN CN202322463927.6U patent/CN220723362U/en active Active
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