CN220247054U

CN220247054U - Grab bucket control system of dredger

Info

Publication number: CN220247054U
Application number: CN202321962277.3U
Authority: CN
Inventors: 刘欧; 王志强; 罗昊; 王睿石; 郑长春; 金鑫
Original assignee: CCCC Shanghai Dredging Co Ltd.
Current assignee: CCCC Shanghai Dredging Co Ltd.
Priority date: 2023-07-25
Filing date: 2023-07-25
Publication date: 2023-12-26
Anticipated expiration: 2033-07-25

Abstract

The utility model discloses a dredger grab bucket control system which comprises a programmable logic controller arranged on a dredger crane and a sonar arranged on a dredger body, wherein a depth sensor and an opening sensor are further arranged on the crane, and the depth sensor, the opening sensor and the sonar are respectively in communication connection with the programmable logic controller. According to the dredger grab bucket control system disclosed by the utility model, the depth sensor is coupled with the lifting steel cable of the grab bucket, the opening sensor is coupled with the opening and closing steel cable of the grab bucket, and the accurate control on the lifting and the opening and closing of the grab bucket can be realized through the programmable logic controller, so that the grab bucket can be ensured to be at the same height each time when working, the flatness of the final dredging working surface is improved, and the lifting of dredging quality is realized. The dredger grab bucket control system is further provided with a sonar capable of measuring underwater topography, so that a crane operator can excavate and clean underwater silt according to topography information fed back by the sonar.

Description

Grab bucket control system of dredger

Technical Field

The utility model belongs to the field of ships, and relates to a dredger, in particular to a grab bucket control system of the dredger.

Background

Currently, dredgers used in channels and inland dredging (such as a yellow river channel) are mainly grab dredgers, and when the existing grab dredgers are used for dredging construction, the lifting control and the opening and closing control of the grab are mostly dependent on the operation experience of a crane operator because of the difficulty in observing underwater conditions, so that a plurality of convex mud surfaces can be formed on the riverbed of the channel, and the finally formed working surfaces are uneven and fluctuant, so that the construction quality is affected.

Disclosure of Invention

The utility model aims to provide a dredger grab bucket control system which can control the working height and the opening degree of a grab bucket more accurately.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a dredger grab bucket control system, includes the programmable logic controller that sets up on dredger hoist and the sonar of setting on dredger hull, still be provided with depth sensor and aperture sensor on the hoist, depth sensor, aperture sensor and sonar respectively with programmable logic controller communication connection.

Optionally, the depth sensor is a first encoder coupled to a lifting fixed sheave on the crane that limits the grapple lifting cable.

Optionally, the depth sensor is a water depth pressure sensor, and the water depth pressure sensor is mounted on a grab bucket body of the crane.

Optionally, the opening sensor is a second encoder, and the second encoder is coupled and connected with an opening and closing fixed pulley on the crane for limiting the grab body to open and close the steel cable.

Optionally, the system further comprises a display terminal, wherein the display terminal is in communication connection with the programmable logic controller.

Optionally, the programmable logic controller is also communicatively connected to a first disc brake on a lifting drum of the crane and a second disc brake on an opening and closing drum.

The beneficial effects of the utility model include:

according to the dredger grab bucket control system disclosed by the utility model, the depth sensor is coupled with the lifting steel cable of the grab bucket, the opening sensor is coupled with the opening and closing steel cable of the grab bucket, the accurate control on the lifting and the opening and the closing of the grab bucket can be realized through the programmable logic controller, the consistency of each working cycle of the crane grab bucket can be ensured, the grab bucket can be ensured to be at the same height each time, the flatness of the final dredging working surface is improved, and the lifting of dredging quality is realized. The dredger grab bucket control system is further provided with a sonar capable of measuring underwater topography in real time, so that a crane operator can pertinently excavate and clean underwater silt according to topography information fed back by the sonar, and dredging efficiency is further improved.

Drawings

FIG. 1 is a schematic illustration of the excavation operation of the dredger grab control system of the present disclosure.

FIG. 2 is a system diagram of a dredger grab control system as disclosed herein.

In the figure: 100. a grapple body; 200. lifting the reel; 210. lifting the steel cable; 220. lifting the fixed pulley; 230. a depth sensor; 240. a first disc brake; 300. opening and closing the winding drum; 310. opening and closing the steel cable; 320. opening and closing the fixed pulley; 330. an opening sensor; 340. a second disc brake.

Detailed Description

The utility model will be further described with reference to the drawings and examples.

Dredgers for dredging inland waterways are generally composed of a hull and a crane mounted on the hull, and dredging and grabbing sludge and silt in the waterway are performed by controlling a crane grab, and the silt is discharged into a silt cabin or a special silt barge, so that underwater silt is repeatedly dredged, and the waterway dredging work is completed.

The crane is provided with a lifting reel 200, an opening and closing reel 300 and a grab bucket body 100, wherein the lifting reel 200 is connected with a lifting steel cable 210, the opening and closing reel 300 is connected with an opening and closing steel cable 310, the tail end of the lifting steel cable 210 is connected to the top of the grab bucket body 100, the retraction and the release of the lifting steel cable 210 can be realized by changing the rotation direction of the lifting reel 200, and the lifting of the grab bucket body 100 can be realized. The end of the opening/closing wire rope 310 is also connected to the grapple body 100, and the opening/closing control of the grapple is achieved by recovering and paying out the opening/closing wire rope 310. In short, the movement control of the grapple body 100 can be achieved by controlling the lifting reel 200 and the opening/closing reel 300.

When the dredger is used for dredging, the grab bucket body 100 is put into the water to grab silt or sand, after the grab bucket body 100 is put into the water, the sight of an operator of the crane is blocked, so that the accurate judgment on the depth position of the grab bucket under the water is difficult, the height fluctuation of the working surface formed by the grab bucket body 100 in the water is difficult to meet the requirement of dredging on channel improvement, and therefore, the grab bucket control system of the dredger is needed to be provided, so that the problems are reduced.

As shown in fig. 1 to 2, a dredger grab control system includes a depth sensor 230 for monitoring a depth of water entering a grab body 100, an opening sensor 330 for monitoring an opening and closing angle of the grab, and a Programmable Logic Controller (PLC). The depth sensor 230 and the opening sensor 330 are respectively in communication connection with the programmable logic controller, and the programmable logic controller receives and processes the monitoring data of the depth sensor 230 and the opening sensor 330, and then transmits the processed data to a data display terminal arranged in front of a crane manipulator, so that the crane manipulator can conveniently acquire the underwater depth information and opening data of the grab body 100 at any time, and more accurate control of the grab is realized.

Optionally, the depth sensor 230 is a first encoder coupled to the lifting rope 210, for example, a roller of the first encoder is connected to a rotating shaft of one lifting fixed pulley 220 that limits the lifting rope 210, the first encoder can obtain the retracted or released length of the lifting rope 210 by recording the rotation angle of the lifting fixed pulley 220, the changed length of the lifting rope 210 is approximately the height change of the grab body 100, so that the reading of the first encoder when the grab body 100 is on the water surface is set to be "0", and the released amount of the lifting rope 210 measured by the first encoder is the depth of the grab body 100 under the water. For example: the working depth of the grab bucket body 100 in water is set to be h through an input device such as a keyboard which is in communication connection with the programmable logic controller, when the first encoder measures that the depth of the grab bucket in water is about to reach h, the programmable logic controller can send a deceleration instruction to the first disc brake 240 on the lifting drum 200 of the crane to decelerate the lifting drum 200, and when the grab bucket body 100 reaches the underwater depth h, the lifting drum 200 stops working, so that the accurate control of the depth of the grab bucket body 100 is realized. Because the grab bucket can stop descending when descending to the depth h each time, the grab bucket can be ensured to excavate on the same horizontal height, the excavation surface formed on the bottom mud by the grab bucket can be ensured to be kept on the same horizontal surface, and the construction quality of dredging is improved. On the other hand, after the sediment grabbing work of one working surface is completed, the grab bucket can be always lowered to the same underwater depth position, so that the excavation working surface can be leveled, and the dredging effect of a channel is further improved.

Alternatively, the depth sensor 230 may be a water depth pressure sensor mounted on the grab body 100, and the greater the depth in the water, the greater the value displayed by the water depth pressure sensor, so that the water depth information may be reflected.

Optionally, the opening sensor 330 is a second encoder coupled to the opening/closing wire rope 310, for example, a drum shaft of the second encoder is connected to a shaft of the opening/closing fixed pulley 320 for limiting the opening/closing wire rope 310, and since the opening/closing of the grab body 100 is achieved by releasing/retracting the opening/closing wire rope 310, the grab body 100 is opened by a specific angle, and accordingly, the recovery length of the opening/closing wire rope 310 is also constant, and the measurement angle of the grab can be measured by measuring the releasing/retracting length of the opening/closing wire rope 310. Due to the height relief of the underwater topography, the consistency and flatness of the work surface can be further improved by controlling the opening angle of the grapple body 100.

The dredger grab bucket control system further comprises a sonar which is arranged on the dredger body and used for measuring the topography and topography of the channel water bottom to be dredged, and particularly, more specific and detailed water bottom topography data can be obtained in the working area of the dredger, so that dredging and dredging can be completed more specifically by the dredger. If according to the detection result of sonar, the dredger is moved to the region with more silt to start working, so that the dredging work is more targeted, and the dredging work efficiency is improved. The sonar is in communication connection with the programmable logic controller, and the programmable logic controller can send the underwater information collected by the sonar to the display terminal, so that an operator can acquire the information such as elevation, trend, sludge distribution and the like of the water at the first time, and the operator can finish excavation operation in a targeted manner.

The lifting drum 200 is provided with a first disc brake 240, and the first disc brake 240 is in communication connection with the programmable logic controller, that is, the programmable logic controller can send a control command to the first disc controller to control the action of the first disc brake 240 so as to achieve the purpose of controlling the lifting speed of the lifting drum 200 more accurately.

The second disc brake 340 communicatively connected to the programmable logic controller is connected to the opening/closing drum 300, and the programmable logic controller may send a control command to the second disc controller to control the second disc brake 340 to perform a more accurate control of the closing of the grapple.

The communication connection is connected through a communication cable capable of transmitting electric signals or digital signals, namely, the programmable logic controller, the depth sensor 230, the opening sensor 330 and the sonar are all connected through the communication cable to realize transmission and reception of data or electric signals.

Optionally, the display terminal has a liquid crystal screen or an OLED screen or other form of display screen.

Optionally, the programmable logic controller is Siemens S7-300, S7-series.

The foregoing description of the embodiments is provided to facilitate the understanding and appreciation of the utility model by those skilled in the art. It will be apparent to those skilled in the art that various modifications can be readily made to these teachings and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. The utility model is not limited to the above description of the embodiments and the description of the embodiments, and those skilled in the art, based on the disclosure of the utility model, should make improvements and modifications without departing from the scope of the utility model.

Claims

1. A dredger grab control system, characterized by: the device comprises a programmable logic controller arranged on a dredger crane and a sonar arranged on a dredger body, wherein a depth sensor and an opening sensor are further arranged on the crane, and the depth sensor, the opening sensor and the sonar are respectively in communication connection with the programmable logic controller.

2. The dredger grab control system of claim 1, wherein: the depth sensor is a first encoder which is coupled with a lifting fixed pulley of a limiting grab lifting steel cable on the crane.

3. The dredger grab control system of claim 1, wherein: the depth sensor is a water depth pressure sensor, and the water depth pressure sensor is arranged on a grab bucket body of the crane.

4. A dredger grab control system according to claim 2 or 3, characterized in that: the opening sensor is a second encoder, and the second encoder is coupled and connected with an opening and closing fixed pulley which limits the grab bucket body to open and close the steel cable on the crane.

5. The dredger grab control system of claim 4, wherein: the display terminal is in communication connection with the programmable logic controller.

6. The dredger grab control system of claim 5, wherein: the programmable logic controller is also in communication connection with a first disc brake on a lifting reel of the crane and a second disc brake on an opening and closing reel.