CN116161539A - Method for preventing wire rope of winding drum from being disordered during grab bucket traveling - Google Patents
Method for preventing wire rope of winding drum from being disordered during grab bucket traveling Download PDFInfo
- Publication number
- CN116161539A CN116161539A CN202310242575.3A CN202310242575A CN116161539A CN 116161539 A CN116161539 A CN 116161539A CN 202310242575 A CN202310242575 A CN 202310242575A CN 116161539 A CN116161539 A CN 116161539A
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- China
- Prior art keywords
- grab bucket
- trolley
- cart
- winding drum
- wire rope
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/46—Position indicators for suspended loads or for crane elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/48—Automatic control of crane drives for producing a single or repeated working cycle; Programme control
Abstract
The invention relates to the technical field of cranes, and discloses a method for preventing a winding drum steel wire rope from being disordered by a grab bucket crane, which comprises the following steps: s1: the grab bucket moves to the position right above the material to be grabbed under the action of the cart and the trolley; s2: the grab bucket opens and falls; s3: measuring and calculating a coordinate deviation value s1 of the grab bucket and the cart and transmitting the coordinate deviation value s1 to a driving control system; s4: measuring and calculating a coordinate deviation value s2 of the grab bucket and the trolley and transmitting the coordinate deviation value s2 to a driving control system; s5: the driving control system correspondingly controls the cart and the trolley to move according to the coordinate deviation value; eliminating the vertical deflection angle of the steel wire rope and enabling the steel wire rope to be vertical to the winding drum on the trolley. According to the method, displacement supplementation is performed on the cart and the trolley in advance, so that the problem that the groove is disordered due to overlarge deflection angle of the steel wire rope in the vertical direction during lifting is avoided.
Description
Technical Field
The invention relates to the technical field of cranes, in particular to a method for preventing a winding drum steel wire rope from being messy by a grab bucket crane.
Background
According to the GBT3811-2008 crane design specification, when the steel wire rope is wound into a reel or wound out of the reel, the angle of the central line of the steel wire rope deviating from the two sides of the central line of the spiral groove should not be larger than 3.5 degrees. The grab bucket is connected with the winch through a steel wire rope. Grab cranes are typically used in situations where loose material is to be grabbed, such as coal yards, ore yards, or inclined yards that are inclined to the horizontal. The grab bucket crane is hoisting equipment for connecting the grab bucket to a winding drum on the crane (crown block) through a steel wire rope. The upper grab bucket can be poured to different degrees due to uneven material surface when falling on the loose materials. When the manual driving operation is performed, a driving operator knows the dumping direction and the tilting degree of the grab bucket to adjust the position of the large and small trolley through visual observation, so that the angle between the steel wire rope and the center of the spiral groove can not exceed the design range during rope collection, and the situation that the steel wire rope of the winding drum is in disorder with the groove can be guaranteed. Under the automatic unmanned condition, because the dumping direction and the tilting degree of the grab bucket can not be judged when grabbing materials, when the grab bucket is dumped seriously, the angle between the steel wire rope and the center of the spiral groove can exceed the maximum angle of 3.5 degrees allowed by the design standard, when the grab bucket grabs materials to rise when the winding drum is retracted, the lateral force of the steel wire rope, which is parallel to the winding drum, is overlarge, so that the steel wire rope is messy or jumped, the grab bucket is further triggered to rotate due to uneven stress of the steel wire rope, and the automatic travelling crane continues to run, so that a safety accident occurs.
The prior art CN201910975686.9 discloses an automatic detection method for a crane steel wire rope, which comprises the following steps:
s1, collecting infrared signals through a receiving plate;
s2, extracting two adjacent data of the signals and judging;
and S3, when two data are changed, the position of the previous data is the current wheel groove position of the steel wire rope.
Although the prior art discloses an automatic monitoring method for a steel wire rope, the disclosed technical scheme is to judge whether the steel wire rope is out of the groove or not by detecting the front and rear position signals of the steel wire rope, and the technical scheme of how to prevent the steel wire rope from being out of the groove is not disclosed. That is, the prior art does not solve the technical solution for preventing the wire rope from being messy during the movement of the reel.
Disclosure of Invention
The invention solves the technical problem of overcoming the defects of the prior art and provides a method for preventing a winding drum steel wire rope from being disordered by a grab bucket crane.
The aim of the invention is achieved by the following technical scheme:
a method for preventing a winding drum steel wire rope from being disordered by a grab bucket crane comprises the following steps:
s1: the grab bucket moves to the position right above the material to be grabbed under the action of the cart and the trolley;
s2: the grab bucket opens and falls;
s3: measuring and calculating a coordinate deviation value s1 of the grab bucket and the cart and transmitting the coordinate deviation value s1 to a driving control system;
s4: measuring and calculating a coordinate deviation value s2 of the grab bucket and the trolley and transmitting the coordinate deviation value s2 to a driving control system;
s5: the driving control system correspondingly controls the cart and the trolley to move according to the coordinate deviation value; eliminating the vertical deflection angle of the steel wire rope and enabling the steel wire rope to be vertical to the winding drum on the trolley.
Preferably, the step S3 includes the steps of:
s31: measuring the dumping angle lambda 1 of the grab bucket in the moving direction of the cart;
s32: s1, s1=2×sin (λ1/2) ×cos ((180- λ1)/2-arctan (h/(d/2) +λ1)) is obtained from the grapple height h, the width d of the grapple in the open state, and the tilting angle λ1.
Preferably, the tilting angle λ1 is measured by a first tilt sensor mounted on the grab.
Preferably, the step S4 includes the steps of:
s31: measuring the dumping angle lambda 2 of the grab bucket in the moving direction of the trolley;
s32: s2, s2=2×sin (λ2/2) ×cos ((180- λ2)/2-arctan (h/(d/2) +λ2)) is obtained from the grapple height h, the width d of the grapple in the open state, and the tilting angle λ2.
Preferably, the tilting angle λ2 is measured by a second tilt sensor mounted on the grab.
Preferably, the step S2 includes the steps of:
s20: the winding drum positioned on the trolley starts to work, and the grab bucket falls to one end of the grab bucket to just contact the material to be grabbed;
s21: the grab bucket continuously falls until the two ends of the grab bucket are completely positioned on the two sides of the material to be grabbed;
preferably, step S5 comprises the steps of:
s51: the cart correspondingly performs compensation movement according to the coordinate deviation value s 1;
s52: the trolley correspondingly performs compensation movement according to the coordinate deviation value s 2;
s53: the actual distance of the compensating movement of the cart and the trolley is confirmed through sensors such as laser ranging, microwave positioning, a coding ruler, a Gray bus and the like arranged on the cart and the trolley;
s54: the two ends of the grab bucket are contracted, so that the materials are clamped.
Preferably, the step S5 further includes the steps of:
s55: when the step S54 is completed, the winding drum starts to work, the grab bucket is pulled to move upwards, and when the grab bucket is lifted to the carrying height, the winding drum stops working, and the grab bucket moves along with the cart and the trolley so as to lift the material to the position right above the designated position;
s56: the winding drum works again, the grab bucket falls to the upper part of the material to be grabbed, the grab bucket is opened, and then the winding drum ascends to the carrying height under the action of the winding drum.
Preferably, a load cell is installed under the bearing housing of the drum, thereby acquiring the weight of the grab bucket in real time.
Preferably, the driving control system is a PLC system.
Compared with the prior art, the invention has the following beneficial effects:
according to the method, the deviation value of the grab bucket in the moving direction of the cart and the trolley is fed back to the driving control system through collection and calculation, the driving control system controls the crown block and the trolley to carry out corresponding displacement supplement, and therefore the deviation angle of the steel wire rope in the vertical direction is adjusted, and the steel wire rope is vertical to the winding drum on the trolley. Therefore, when the winding drum starts to rotate, the wire rope is effectively prevented from being in a mess groove on the winding drum.
1) Before lifting materials, displacement supplement is carried out on the cart and the trolley in advance by measuring the deviation values of the grab bucket and the cart and the trolley, so that mess grooves caused by overlarge deviation angle of the steel wire rope in the vertical direction during lifting are avoided.
2) The calculation of the deviation value is related to the size of the grab bucket, namely the method is suitable for grab buckets of different models, and has higher applicability.
Drawings
FIG. 1 is a flow chart of a method for preventing rope from derailing a drum by a grapple crane;
FIG. 2 is an exploded view of step S3 of a method for preventing rope from derailing in a drum of a grapple crane;
FIG. 3 is an exploded view of step S4 of a method for preventing rope mess of a drum in a grapple crane;
fig. 4 is an exploded view of step S5 in a method for preventing rope from derailing in a drum of a grapple crane.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Example 1
As shown in fig. 1, a method for preventing a reel wire rope from being disordered by a grab bucket crane is disclosed, which comprises the following steps:
s1: the grab bucket moves to the position right above the material to be grabbed under the action of the cart and the trolley;
s2: the grab bucket opens and falls;
s3: measuring and calculating a coordinate deviation value s1 of the grab bucket and the cart and transmitting the coordinate deviation value s1 to a driving control system;
s4: measuring and calculating a coordinate deviation value s2 of the grab bucket and the trolley and transmitting the coordinate deviation value s2 to a driving control system;
s5: the driving control system correspondingly controls the cart and the trolley to move according to the coordinate deviation value; eliminating the vertical deflection angle of the steel wire rope and enabling the steel wire rope to be vertical to the winding drum on the trolley.
The grab bucket is connected to a winding drum on the trolley through a steel wire rope. When the material is required to be grabbed, the grab bucket moves to the position right above the material placing position under the action of the cart and the trolley, and the material placing position is the material grabbing position of the grab bucket. After the grab bucket grabs the material, there are two cases:
and (3) a step of: the grab bucket falls to the completion and will wait to snatch the material centre gripping, the grab bucket does not take place any change relative horizontal direction's angle, and the angle of wire rope relative vertical direction who is connected with the grab bucket also can not change under this kind of circumstances, and is natural, and grab bucket in this kind of circumstances is snatched the material, and wire rope can not have the mess groove, take off the groove phenomenon.
And II: the material to be grabbed is placed on the inclined plane or the material to be grabbed is an abnormal piece, after the grab bucket falls down, the grabbing end on only one side of the grab bucket can be contacted with the material to be grabbed first, and the point where the grab bucket and the material to be grabbed are contacted first is a first contact point. When the grab continues to fall, the grab bucket rotates relative to the material to be grabbed by taking the first contact as a reference point until the other grabbing end of the grab bucket moves to a proper grabbing position, and at the moment, the grab bucket tightens up to clamp the material to be grabbed. Naturally, the angle of the grab bucket relative to the horizontal direction changes, and the angle of the steel wire rope connected with the grab bucket relative to the vertical direction also changes. After the angle of the steel wire rope relative to the vertical direction is changed, when the winding drum starts to tighten the steel wire rope, the steel wire rope is easy to break up and get out of the groove.
In order to avoid the wire rope mess caused by the second situation, the embodiment prevents the wire rope mess by the following technical scheme, and the specific scheme is as follows:
firstly, the grab bucket moves to the position right above the material to be grabbed under the action of the cart and the trolley. The information of the materials to be grabbed can be scanned and identified through the visual sensor arranged on the cart or the trolley, so that the specific position of the materials to be grabbed is confirmed, and finally, the cart and the trolley are controlled to move by the driving control system, so that the grab bucket is moved to the position right above the materials to be grabbed. At this time, the grab bucket connected with the winding drum on the trolley through the steel wire rope is opened, and along with the rope releasing of the winding drum, the grab bucket gradually falls to one grabbing end of the grab bucket to be contacted with the material to be grabbed, the grab bucket continuously falls to two grabbing ends of the grab bucket to be located at two ends of the material to be grabbed, and the grab bucket tightens up to grasp the material. At this time, the coordinate deviation value s1 of the grab bucket and the cart is measured and calculated and transmitted to the traveling control system, and the coordinate deviation value s2 of the grab bucket and the cart is measured and calculated and transmitted to the traveling control system. s1 and s2 are offset values of the corresponding grab bucket in the X-axis direction and the Y-axis direction in the material grabbing process, namely displacement offset values of the corresponding grab bucket relative to the cart and the cart in the material grabbing process. The driving control system correspondingly controls the cart and the trolley to move according to the coordinate deviation values s1 and s 2; eliminating the vertical deflection angle of the steel wire rope and enabling the steel wire rope to be vertical to the winding drum on the trolley. When the positions of the cart and the trolley are adjusted, the steel wire rope is in vertical relation with the winding drum on the trolley, and the winding drum starts to retract the rope, so that the grab bucket is lifted upwards, and the phenomenon of groove disorder of the steel wire rope is avoided. By the method, before the grab bucket is lifted, the position deviation of the grab bucket, the cart and the trolley is timely adjusted, the risk of wire rope mess is eliminated, and therefore the purpose of preventing the wire rope mess is well achieved. Before lifting materials, displacement supplementation is carried out on the cart and the trolley in advance by measuring the deviation values of the grab bucket and the cart and the trolley, so that mess grooves caused by overlarge deviation angle of the steel wire rope in the vertical direction during lifting are avoided, and the calculation of the deviation values is related to the size of the grab bucket, namely, the method is suitable for grab buckets of different models and has higher applicability.
Example 2
The method for preventing the wire rope of the winding drum from being messy by the grab bucket crane comprises the following steps:
s1: the grab bucket moves to the position right above the material to be grabbed under the action of the cart and the trolley;
s2: the grab bucket opens and falls;
s3: measuring and calculating a coordinate deviation value s1 of the grab bucket and the cart and transmitting the coordinate deviation value s1 to a driving control system;
s4: measuring and calculating a coordinate deviation value s2 of the grab bucket and the trolley and transmitting the coordinate deviation value s2 to a driving control system;
s5: the driving control system correspondingly controls the cart and the trolley to move according to the coordinate deviation value; eliminating the vertical deflection angle of the steel wire rope and enabling the steel wire rope to be vertical to the winding drum on the trolley.
The difference between this embodiment and embodiment 1 is that: step S3 comprises the steps of:
s31: measuring the dumping angle lambda 1 of the grab bucket in the moving direction of the cart;
s32: s1, s1=2×sin (λ1/2) ×cos ((180- λ1)/2-arctan (h/(d/2) +λ1)) is obtained from the grapple height h, the width d of the grapple in the open state, and the tilting angle λ1
The deviation value s1 of the grab bucket relative to the cart, namely the displacement value of the grab bucket relative to the cart, is calculated according to the height h of the grab bucket and the width d of the bottom of the grab bucket in the opened state by measuring the dumping angle lambda 1 of the grab bucket in the moving direction of the cart.
Step S4 comprises the steps of:
s41: measuring the dumping angle lambda 2 of the grab bucket in the moving direction of the trolley;
s42: s2 is determined from the height h of the grab, the width d of the grab in the open state and the tilting angle λ2, s2=2×sin (λ2/2) ×cos ((180- λ2)/2-arctan (h/(d/2) +λ2)
And similarly, obtaining a deviation value s2 of the grab bucket relative to the trolley, namely a displacement value of the grab bucket relative to the trolley.
Specifically, the dumping angle λ1 may be measured by a first tilt sensor mounted on the grapple and the dumping angle λ2 may be measured by a second tilt sensor mounted on the grapple. Of course, in order to improve the accuracy of the tilting angle, measurement may be performed by providing a plurality of tilt sensors, and then an average value may be obtained.
In this embodiment, the step S2 includes the following steps:
s20: the winding drum positioned on the trolley starts to work, and the grab bucket falls to one end of the grab bucket to just contact the material to be grabbed;
s21: the grab bucket continuously falls until the two ends of the grab bucket are completely positioned on the two sides of the material to be grabbed;
example 3
The method for preventing the wire rope of the winding drum from being messy by the grab bucket crane comprises the following steps:
s1: the grab bucket moves to the position right above the material to be grabbed under the action of the cart and the trolley;
s2: the grab bucket opens and falls;
s3: measuring and calculating a coordinate deviation value s1 of the grab bucket and the cart and transmitting the coordinate deviation value s1 to a driving control system;
s4: measuring and calculating a coordinate deviation value s2 of the grab bucket and the trolley and transmitting the coordinate deviation value s2 to a driving control system;
s5: the driving control system correspondingly controls the cart and the trolley to move according to the coordinate deviation value; eliminating the vertical deflection angle of the steel wire rope and enabling the steel wire rope to be vertical to the winding drum on the trolley.
The difference between this embodiment and embodiment 1 is that:
step S5 comprises the steps of:
s51: the cart correspondingly performs compensation movement according to the coordinate deviation value s 1;
s52: the trolley correspondingly performs compensation movement according to the coordinate deviation value s 2;
s53: the actual distance of the compensating movement of the cart and the trolley is confirmed through sensors such as laser ranging, microwave positioning, a coding ruler, a Gray bus and the like arranged on the cart and the trolley;
s54: the two ends of the grab bucket are contracted, so that the materials are clamped.
When the driving control system receives the s1 signal, controlling the cart to perform corresponding supplementary movement; and when the driving control system receives the s2 signal, the trolley is controlled to perform corresponding supplementary movement. Finally, the steel wire rope is perpendicular to the winding drum. In order to ensure the displacement precision of the cart and the trolley, the actual distance of the cart and the trolley compensation movement can be confirmed by the laser ranging, microwave positioning, the coding ruler, the Gray bus and the like sensors on the cart and the trolley. Through the up-to-date sensor, the displacement precision of the cart and the trolley is accurately identified, so that the industry precision is improved, and meanwhile, the problem that the wire rope is messy due to inaccurate movement of the cart or the trolley is avoided.
In this embodiment, step S5 further includes the steps of:
s55: when the step S54 is completed, the winding drum starts to work, the grab bucket is pulled to move upwards, and when the grab bucket is lifted to the carrying height, the winding drum stops working, and the grab bucket moves along with the cart and the trolley so as to lift the material to the position right above the designated position;
s56: the winding drum works again, the grab bucket falls to the upper part of the material to be grabbed, the grab bucket is opened, and then the winding drum ascends to the carrying height under the action of the winding drum.
In this embodiment, a weighing sensor may also be installed under the bearing seat of the spool, so as to obtain the weight of the grab bucket in real time. The weight of the grab bucket is tested through the weighing sensor, so that whether the grab bucket grabs materials or not and whether the materials fall down or not in the lifting process are judged.
The driving control system is a PLC system, and the PLC has the advantages of fast and stable operation.
It is apparent that the above examples are only examples for clearly illustrating the technical solution of the present invention, and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. The method for preventing the wire rope of the winding drum from being disordered by the grab bucket crane is characterized by comprising the following steps of:
s1: the grab bucket moves to the position right above the material to be grabbed under the action of the cart and the trolley;
s2: the grab bucket opens and falls;
s3: measuring and calculating a coordinate deviation value s1 of the grab bucket and the cart and transmitting the coordinate deviation value s1 to a driving control system;
s4: measuring and calculating a coordinate deviation value s2 of the grab bucket and the trolley and transmitting the coordinate deviation value s2 to a driving control system;
s5: the driving control system correspondingly controls the cart and the trolley to move according to the coordinate deviation value; eliminating the vertical deflection angle of the steel wire rope and enabling the steel wire rope to be vertical to the winding drum on the trolley.
2. The method for preventing the rope from being derailed by the drum of the grab crane according to claim 1, wherein the step S3 comprises the following steps:
s31: measuring the dumping angle lambda 1 of the grab bucket in the moving direction of the cart;
s32: s1, s1=2×sin (λ1/2) ×cos ((180- λ1)/2-arctan (h/(d/2) +λ1)) is obtained from the grapple height h, the width d of the grapple in the open state, and the tilting angle λ1.
3. A method of preventing rope drum de-nesting in a grapple crane according to claim 2, wherein said tilting angle λ1 is measured by a first tilt sensor mounted on the grapple.
4. The method for preventing the rope from being derailed by the drum of the grab crane according to claim 1, wherein the step S4 comprises the following steps:
s41: measuring the dumping angle lambda 2 of the grab bucket in the moving direction of the trolley;
s42: s2, s2=2×sin (λ2/2) ×cos ((180- λ2)/2-arctan (h/(d/2) +λ2)) is obtained from the grapple height h, the width d of the grapple in the open state, and the tilting angle λ2.
5. The method of claim 4, wherein the tilt angle λ2 is measured by a second tilt sensor mounted to the grapple.
6. The method for preventing the rope from being derailed by the drum of the grab crane according to claim 1, wherein the step S2 comprises the following steps:
s20: the winding drum positioned on the trolley starts to work, and the grab bucket falls to one end of the grab bucket to just contact the material to be grabbed;
s21: the grab bucket continues to fall until both ends of the grab bucket are completely positioned at both sides of the material to be grabbed.
7. The method for preventing rope from being derailed by a drum for a grapple crane according to claim 1, wherein the step S5 comprises the steps of:
s51: the cart correspondingly performs compensation movement according to the coordinate deviation value s 1;
s52: the trolley correspondingly performs compensation movement according to the coordinate deviation value s 2;
s53: the actual distance of the compensating movement of the cart and the trolley is confirmed through sensors such as laser ranging, microwave positioning, a coding ruler, a Gray bus and the like arranged on the cart and the trolley;
s54: the two ends of the grab bucket are contracted, so that the materials are clamped.
8. The method for preventing rope from being derailed by a drum for a grapple crane according to claim 7, wherein said step S5 further comprises the steps of:
s55: when the step S54 is completed, the winding drum starts to work, the grab bucket is pulled to move upwards, and when the grab bucket is lifted to the carrying height, the winding drum stops working, and the grab bucket moves along with the cart and the trolley so as to lift the material to the position right above the designated position;
s56: the winding drum works again, the grab bucket falls to the upper part of the material to be grabbed, the grab bucket is opened, and then the winding drum ascends to the carrying height under the action of the winding drum.
9. The method for preventing the wire rope of the winding drum from being disordered by the grab bucket traveling crane according to claim 1, wherein a weighing sensor is arranged below a bearing seat of the winding drum, so that the weight of the grab bucket is obtained in real time.
10. The method for preventing the wire rope of the winding drum from being disordered for the grab bucket crane according to claim 1, wherein the crane control system is a PLC system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310242575.3A CN116161539A (en) | 2023-03-10 | 2023-03-10 | Method for preventing wire rope of winding drum from being disordered during grab bucket traveling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310242575.3A CN116161539A (en) | 2023-03-10 | 2023-03-10 | Method for preventing wire rope of winding drum from being disordered during grab bucket traveling |
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| Publication Number | Publication Date |
|---|---|
| CN116161539A true CN116161539A (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310242575.3A Pending CN116161539A (en) | 2023-03-10 | 2023-03-10 | Method for preventing wire rope of winding drum from being disordered during grab bucket traveling |
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| Country | Link |
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| CN (1) | CN116161539A (en) |
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- 2023-03-10 CN CN202310242575.3A patent/CN116161539A/en active Pending
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