CN111624013A - Test platform for testing performance of online dredging device at bottom of external-in and internal-out type drum net - Google Patents

Abstract

The invention discloses a test platform for testing the performance of an online dredging device at the bottom of an external-in and internal-out type drum net, which comprises a test foundation pit, wherein a planar support plate is arranged at the top of the test foundation pit, a plurality of support columns are arranged on the planar support plate, an operation platform is arranged between the top ends of the support columns, a sedimentation hopper is arranged in the test foundation pit, the top surface of the sedimentation hopper is higher than the top surface of the planar support plate, a sedimentation hopper inlet and outlet is arranged on the top surface of the sedimentation hopper, a dredging channel is downwards arranged on the operation platform, the bottom end of the dredging channel is communicated with the sedimentation hopper inlet and outlet, a dredging device is hoisted above a channel port of the dredging channel, and the dredging device can enter the sedimentation hopper along the inner wall of the dredging channel to suck and clean sediment simulators. The invention can verify the overall performance of the online dredging device at the bottom of the drum network, and can also find the defects of the online dredging device at the bottom of the drum network in design and the problems possibly encountered during operation in advance.

Description

Test platform for testing performance of online dredging device at bottom of external-in and internal-out type drum net

Technical Field

The invention belongs to the technical field of circulating water filtration and sewage discharge of nuclear power plants, and particularly relates to a test platform for testing the performance of an external-in and internal-out type on-line dredging device at the bottom of a drum net.

Background

The drum-shaped filter screen is used as the last-stage large-scale filter equipment for defending marine organisms in a depth defense system of a nuclear power plant cold source security system, and the performance of the drum-shaped filter screen directly determines the safety of the nuclear power plant cold source. Through comparative analysis and experience feedback on the capability of resisting marine organism invasion of two types of drum type filter screens of 'outside-in-inside-out' and 'inside-in-outside-out' in a nuclear power plant, the drum type filter screen has obvious advantages in the aspect of marine organism prevention and control.

In a circulating water system of an external-in and internal-out drum-shaped filter screen, sundries with large specific gravity in water flow are deposited on a runner at the bottom of a drum screen and cannot be taken away by a drum screen dredging plate, and the sundries are deposited on the runner at the bottom of the drum screen and influence the normal operation of the drum screen due to excessive deposition. Usually, the amount of marine organisms deposited in the bottom flow channel of the drum net is about 15 tons in a maintenance cycle, the deposits are mainly of marine organisms such as green-lipped mussels and barnacles, the deposition position is mainly on the flow channel on the back water side under the drum net, and the deposition range is about 4 x 1.5 meters. Accordingly, it is necessary to design and develop an external-in and internal-out type drum net bottom online dredging device.

In the design and development process of the external-in and internal-out type drum net bottom online dredging device, a prototype manufacturing machine is required to perform a performance test to verify the performance of the drum net bottom online dredging device and is used for optimizing structural design parameters and operation parameters, however, the drum net online dredging device cannot perform performance verification and various operation tests on the operation site of a nuclear power station, so that a test platform for testing the performance of the external-in and internal-out type drum net bottom online dredging device needs to be designed and manufactured in a factory according to an actual structure 1:1 of a nuclear power drum net bottom flow channel.

Disclosure of Invention

The invention aims to provide a test platform for testing the performance of an external-in and internal-out type drum network bottom online dredging device, and aims to solve the problems that the drum network online dredging device provided in the background technology cannot perform performance verification and various operation tests on a nuclear power station operation site, and cannot find out the design deficiency and possible operation problems of the drum network bottom online dredging device in advance.

To a problem of (a).

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a test platform of online desilting device performance in type drum net bottom portion in advancing outward, includes experimental foundation ditch, the top of experimental foundation ditch is provided with the plane backup pad, be provided with a plurality of support columns on the top surface of plane backup pad, be provided with operation platform between the top of a plurality of support columns, be provided with the siltation fill in the experimental foundation ditch, the siltation is fought and is used for placing the siltation simulant of various forms, the top surface that the siltation was fought is higher than the top surface of plane backup pad, the top surface that the siltation was fought is provided with the siltation and fights and imports and exports, the last desilting passageway that is provided with downwards of operation platform, the bottom and the siltation fill of desilting passageway are imported and exported and are linked together, the channel mouth top hoist and mount of desilting passageway have the desilting device, the desilting device can follow the desilting passageway inner wall and.

Furthermore, the dredging device comprises a holding frame, a dredging assembly is arranged in the holding frame, the dredging assembly comprises a suction mechanism, a water flow speed reducing mechanism, a graded filtering mechanism, a garbage collector and an unloading mechanism which are sequentially connected, the suction mechanism and the graded filtering mechanism are arranged at the left and right sides, the water flow speed reducing mechanism is arranged between the suction mechanism and the graded filtering mechanism, the garbage collector and the unloading mechanism are sequentially arranged below the graded filtering mechanism,

the suction mechanism is used for sucking the siltation simulants and comprises a suction center, a suction pipeline and a suction head assembly which are sequentially connected from top to bottom;

the water flow speed reducing mechanism is used for carrying out speed reduction treatment on water flow flowing through the water flow speed reducing mechanism;

the graded filtering mechanism is used for carrying out graded filtering on siltation simulants carried in water flow flowing through the graded filtering mechanism, the graded filtering mechanism comprises a mesh cage, and a plurality of filtering mesh chambers are arranged in the mesh cage;

the garbage collector is used for collecting siltation simulants accumulated in the grading filtering mechanism;

the discharging mechanism is used for discharging the collected siltation simulants.

Furthermore, a manhole door is arranged on the top surface of the sedimentation hopper.

Furthermore, a water drain valve is arranged at the bottom of the sedimentation hopper.

Furthermore, the inner wall of the sedimentation bucket is provided with a plurality of sedimentation bucket cameras.

Furthermore, the inner wall of the sedimentation hopper is also provided with a plurality of sounding lamps.

Furthermore, a supporting roller guide seat and an electric retention frame guide plate are arranged at the passage opening of the dredging passage.

Furthermore, a sealing gasket is arranged between the bottom end of the dredging channel and the inlet and the outlet of the sedimentation hopper.

Furthermore, a guardrail is arranged on the operating platform.

Furthermore, one side of the plane supporting plate is provided with a control cabinet installed on the ground.

Compared with the prior art, the invention provides a test platform for testing the performance of the online dredging device at the bottom of the external-in and internal-out type drum net, which has the following beneficial effects:

1. the invention provides a reliable performance verification place for the online dredging device at the bottom of the drum network, can find the problems of the bottom dredging device in structural design and parameter design in the design and development stage in advance, is convenient for improvement and optimization, reduces the economic investment in performance test, increases the reliability of the prototype equipment of the bottom dredging device in the actual operation of a nuclear power plant, and greatly reduces the maintenance frequency on site;

2. the invention can not only test the dredging performance and the collecting performance of the online dredging device at the bottom of the drum network, but also detect the working reliability of the moving part, the cleaning part and the flexible part of the whole device;

3. the inclination angle of the side surface of the sedimentation hopper is consistent with the civil engineering of a nuclear power plant site, the working process of the bottom dredging device on the site can be truly simulated, and problems such as blocked descending of a suction pipeline, abrasion of a suction head and the like can be found in advance;

4. the dredging device carries out a plurality of times of dredging tests through the test platform, can grope out the operation rule of the dredging device, and provides a reference basis for setting actual operation parameters;

5. according to the invention, the sedimentation hopper is internally provided with a plurality of underwater searchlights and underwater cameras, and the underwater cameras are provided with a professional image processing technology, so that the underwater visual range is improved by 50%, a clear video of the running process of the whole set of dredging device can be shot under the turbid water condition, and a material is provided for popularization and propaganda of later-stage products;

6. the test platform can be used for carrying out dredging tests on different types of sediments, and provides possibility for developing dredging devices aiming at different types of sewage.

7. All the parts in the invention are easy to install and disassemble, and can provide a place for performance tests of other water treatment equipment.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:

FIG. 1 is a test platform for testing the performance of an online dredging device at the bottom of an external-in and internal-out type drum net, which is provided by the invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a schematic structural diagram of the dredging device;

FIG. 4 is a side view of FIG. 3 with the suction mechanism removed;

FIG. 5 is a schematic diagram of the construction of the suction head assembly of FIG. 3;

FIG. 6 is a schematic structural view of an embodiment of the water flow retarding mechanism of FIG. 3;

FIG. 7 is a schematic structural diagram of a second embodiment of the water flow retarding mechanism of FIG. 3;

FIG. 8 is a schematic diagram of a third embodiment of the water flow retarding mechanism of FIG. 3;

FIG. 9 is a schematic structural view of the discharging mechanism in FIG. 3;

FIG. 10 is a schematic structural view of the support mechanism of FIG. 3;

fig. 11 is a schematic structural view of the cleaning mechanism in fig. 3.

In the figure:

testing a foundation pit 1;

a planar support plate 2;

a support column 3;

an operating platform 4;

a sedimentation hopper 5;

a dredging channel 6;

a dredging device 7; a mounting platform 701; a holding frame 702; a suction mechanism 703; suction centre 703.1; a suction line 703.2; a suction head assembly 703.3; a suction head 703.3.1; flange connection 703.3.2; a tapered block 703.3.3; bump rollers 703.3.4; a suction mechanism camera 703.3.5; a mount 703.4; a quick connector 703.5; a water flow decelerating mechanism 704; a first cylindrical section 704.1; a conical section 704.2; a second cylindrical section 704.3; a third cylindrical section 704.4; a prism segment 704.5; a rectangular section 704.6; a buffer plate 704.7; a graded filtering mechanism 705; a netpen 705.1; 705.2 of a filter screen plate; a filter screen chamber 705.3; a classification filter mechanism detection switch 705.4; a garbage collector 706; a discharge mechanism 707; a housing 707.1; a rotating shaft 707.2; a roll-over panel 707.3; an inlet port 707.4; a discharge port 707.5; a support mechanism 708; a first guide 708.1; a first telescoping support 708.2; support rollers 708.3; a first spring 708.4; a cleaning mechanism 709; a second guide base 709.1; a second telescoping support 709.2; a sweeping block 709.3; a second spring 709.4; a special spreader 710; an electric retention frame 711; a cable lifting mechanism 712; a cable drum 712.1; cable diverter wheels 712.2; a spool support 712.3; an electric control cabinet 713; a positioning pin 714;

a ladder stand 8;

a manhole door 9;

an observation window 10;

a reinforcing frame 11;

a support base 12;

a water drain valve 13;

a supporting roller guide 14;

an electric retention frame guide plate 15;

a guardrail 16;

a sedimentation bucket camera 17;

a searchlight 18;

a control cabinet 19;

and a gasket 20.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 11, the present invention provides a technical solution: a test platform for testing the performance of an online dredging device at the bottom of an external-in and internal-out type drum net comprises a test foundation pit 1, wherein a plane support plate 2 is arranged at the top of the test foundation pit 1, a plurality of support columns 3 are arranged on the top surface of the plane support plate 2, an operation platform 4 is arranged between the top ends of the support columns 3, a sedimentation hopper 5 is arranged in the test foundation pit 1, the sedimentation hopper 5 is used for placing sedimentation simulators in various forms, the top surface of the sedimentation hopper 5 is higher than that of the plane support plate 2, a sedimentation hopper inlet and outlet is arranged on the top surface of the sedimentation hopper 5, a dredging channel 6 is downwards arranged on the operation platform 4, the bottom end of the dredging channel 6 is communicated with the sedimentation hopper inlet and outlet, a dredging device 7 is hoisted above a channel opening of the dredging channel 6, the dredging device 7 can enter the sedimentation hopper 5 along the inner wall of the dredging channel 6, pumping and cleaning the silting simulants;

the test foundation pit 1 is a concrete test foundation pit for realizing a hoisting test of a tester in a workshop and reducing the overall height of an operation platform;

the sedimentation hopper 5 is a sedimentation pit simulating a back water side flow channel at the bottom of an actual net-blowing chamber, and the sedimentation hopper 5 is formed by welding a plurality of steel plates together, so that the structure and the size of the sedimentation hopper 5 are consistent with those of the actual sedimentation pit;

a crawling ladder 8 is arranged in the sedimentation hopper 5, so that a tester can conveniently climb into the bottom of the sedimentation hopper 5;

a manhole door 9 is arranged on the top surface of the sedimentation hopper 5, and the manhole door 9 is positioned right above the crawling ladder 8, so that a tester can conveniently enter the sedimentation hopper 5 to overhaul and adjust test equipment;

the sedimentation hopper 5 is provided with two observation windows 10, wherein one observation window 10 is arranged on the top surface of the sedimentation hopper 5, and the other observation window 10 is arranged on the side surface of the sedimentation hopper 5, so that a tester can observe the test condition in multiple angles;

the outer side wall of the sedimentation hopper 5 is provided with a reinforcing frame 11 for further reinforcing the rigidity of the sedimentation hopper 5 and ensuring that the sedimentation hopper 5 does not deform and leak under the action of water pressure;

a supporting seat 12 is arranged between the outer side wall of the sedimentation hopper 5 and the top surface of the plane supporting plate 2 and is used for supporting the whole test platform;

the bottom of the sedimentation hopper 5 is provided with a water drain valve 13 for discharging test water;

the inner wall of the sedimentation hopper 5 is provided with a plurality of sedimentation hopper cameras 17, and the sedimentation hopper cameras 17 adopt underwater muddy water cameras, so that the whole test equipment can be shot and monitored at multiple angles underwater;

the inner wall of the sedimentation hopper 5 is also provided with a plurality of probe lamps 18 so as to ensure the brightness inside the sedimentation hopper 5 and the dredging channel 6;

the dredging channel 6 is a dredging channel which simulates the side of an actual net-blowing chamber, and the dredging channel 6 is formed by welding plates and sectional materials;

a supporting roller guide seat 14 and an electric retention frame guide plate 15 are arranged at the passage opening of the dredging passage 6, so that the dredging device 7 can easily enter the dredging passage 6;

a sealing gasket 20 is arranged between the bottom end of the dredging channel 6 and the inlet and outlet of the sedimentation hopper 5, so that the connection sealing property of the sedimentation hopper 5 and the dredging channel 6 can be ensured;

the operating platform 4 is provided with a guardrail 16 to prevent the tester from falling;

a control cabinet 19 arranged on the ground is arranged on one side of the planar support plate 2 and used for controlling all electrical equipment in the test platform and monitoring and recording the whole test process;

the dredging device 7 comprises a holding frame 702, a dredging assembly is arranged in the holding frame 702, the dredging assembly comprises a suction mechanism 703, a water flow speed reducing mechanism 704, a graded filtering mechanism 705, a garbage collector 706 and a discharging mechanism 707 which are connected in sequence,

the suction mechanism 703 is used for sucking the sludge in the sludge pit (sludge simulant in the sludge hopper 5);

the suction mechanism 703 is arranged at the left section of the holding frame 702, the suction mechanism 703 comprises a suction hub 703.1, a suction pipeline 703.2 and a suction head assembly 703.3 which are sequentially connected from top to bottom, the suction hub 703.1 is arranged inside the holding frame 702, the suction pipeline 703.2 and the suction head assembly 703.3 are arranged below the holding frame 702, the suction hub 703.1 is arranged on the bottom surface inside the holding frame 702 through a mounting seat 703.4, one end of the suction pipeline 703.2 is connected with the bottom end of the suction hub 703.1 through a quick connector 703.5, and the other end of the suction pipeline 703.2 is connected with the suction head assembly 703.3 through a flange;

the suction head assembly 703.3 comprises a suction head 703.3.1, the suction head 703.3.1 is a conical structure with a gradually increasing caliber from top to bottom, a flange connection part 703.3.2 is arranged at the top end of the suction head 703.3.1, a plurality of conical blocks 703.3.3 are uniformly arranged at the bottom end of the suction head 703.3.1 along the circumferential direction, and the plurality of conical blocks 703.3.3 are beneficial to the suction head 703.3.1 to penetrate into sludge and fully contact with the sludge to effectively suck the sludge;

the dimensions of the bottom of the sludge hopper 5 are larger than the dimensions of the suction head 703.3.1 so that the suction head 703.3.1 is in sufficient contact with the sludge for effective suction;

the lower part of the outer wall of the suction head 703.3.1 is annularly provided with a plurality of anti-collision rollers 703.3.4 which are arranged at intervals, and the anti-collision rollers 703.3.4 are used for preventing the suction head 703.3.1 from colliding with and rubbing against the wall surface of the dredging channel 6 to be damaged in the lifting process;

the outer wall of the suction head 703.3.1 is provided with a suction mechanism camera 703.3.5, and the suction mechanism camera 703.3.5 is used for instantly transmitting a front-end picture of dredging operation, so that ground personnel can conveniently master the suction condition in time to judge whether next dredging operation is needed;

the suction center 703.1 is the power driving core of the dredging device 7, and can select a suction pump of a suitable type according to different water qualities, sludge types, sludge sizes and installation and arrangement requirements;

the quick connector 703.5 can adopt a structure of two-end opening and closing type, two-end opening type, one-way opening and closing type and the like, is used for quickly disassembling and assembling the suction pipeline 703.2 and the suction center 703.1, has the characteristics of simple assembling and disassembling action and time and labor saving, and can ensure that the lifting of the dredging device 7 is not limited by the height of a factory building and is convenient to maintain and adjust because the suction pipeline 703.2 is longer in size and the quick connector 703.5 is used;

the suction line 703.2 may be a rubber hose of 2-3m length.

The water flow speed reducing mechanism 704 is used for reducing the speed of the water flow flowing through the water flow speed reducing mechanism, so that the high-speed water flow is prevented from generating large impact on parts in the graded filtering mechanism 705, and the service life of the graded filtering mechanism is prolonged;

the water flow speed reducing mechanism 704 comprises a speed reducing pipe, the speed reducing pipe comprises a water inlet section, a transition section and a water outlet section which are sequentially connected along the water flow direction,

the speed reducing pipe can adopt the following three structures to achieve the purpose of speed reducing treatment of water flow flowing through the speed reducing pipe;

in the first embodiment, the speed reducing pipe comprises a first cylindrical section 704.1, a conical section 704.2 with gradually enlarged caliber and a second cylindrical section 704.3 which are sequentially connected in the water flow direction;

in the second embodiment, the speed reducing pipe comprises a third cylindrical section 704.4, a prismatic section 704.5 with gradually enlarged caliber and a rectangular section 704.6 which are connected in sequence along the water flow direction;

the third embodiment and the second embodiment are different in that: two symmetrically arranged buffer plates 704.7 are arranged in the rectangular section 704.6, and the two buffer plates 704.7 are arranged in a splayed shape.

The graded filtering mechanism 705 is used for graded filtering of sediments entrained in water flow flowing through the graded filtering mechanism 705, the graded filtering mechanism 705 is arranged at the right section of the holding frame 702, the graded filtering mechanism 705 comprises a net cage 705.1, the left wall surface of the net cage 705.1 is provided with an inlet, the bottom surface of the net cage 705.1 is provided with an outlet, a plurality of left and right parallel filtering net plates 705.2 are arranged in the net cage 705.1, the inner cavity of the net cage 705.1 is divided into a plurality of filtering net chambers 705.3 by the plurality of filtering net plates 705.2, and the filtering precision of the plurality of filtering net plates 705.2 is higher and higher from left to right;

preferably, a graded filtering mechanism detection switch 705.4 is arranged at the top of the filtering screen chamber 705.3 close to the inlet of the mesh cage 705.1 and used for detecting the sediment amount in the filtering screen chamber in real time;

the filter screen plates 705.2 can select screen plates with different mesh shapes, different mesh distribution modes and different mesh filter precisions according to the type and size of the sludge.

The garbage collector 706 is disposed below the staged filtering mechanism 705, and is used for collecting sludge accumulated in the staged filtering mechanism 705.

The discharging mechanism 707 is disposed below the garbage collector 706, and is configured to discharge the collected sludge, the discharging mechanism 707 includes a housing 707.1, a feeding port 707.4 is disposed at a top end of the housing 707.1, a discharging port 707.5 is disposed at a bottom end of the housing 707.1, a rotating shaft 707.2 is disposed in the housing 707.1, a power source is disposed at one end of the rotating shaft 707.2, a turning plate 707.3 is disposed on the rotating shaft 707.2, and the turning plate 707.3 can rotate up and down by 90 ° around the rotating shaft 707.2;

the gravity inductor is arranged on the overturning plate 707.3 and is used for detecting the weight of sludge removed in each dredging operation, and meanwhile, the sludge discharge signal can be rechecked according to the weight detection, so that the false action of the detection switch 705.4 of the grading filtering mechanism is prevented.

The holding frame 702 is formed by assembling, welding and assembling angle steels and is used for fixing and holding other components in the dredging assembly;

a plurality of supporting mechanisms 708 are annularly arranged on the upper part of the outer wall of the holding frame 702, the supporting mechanisms 708 can prevent the retaining frame 702 from colliding and rubbing with the inner wall surface of the dredging channel 6 to cause damage in the lifting process of the dredging device 7, the supporting mechanisms 708 comprise first guide seats 708.1 which are radially arranged along the holding frame 702, the outer ends of the first guide seats 708.1 are connected with the inner wall of the holding frame 702 through bolts, first telescopic brackets 708.2 are arranged in the first guide seats 708.1, first springs 708.4 are arranged between the inner ends of the first telescopic brackets 708.2 and the inner ends of the first guide seats 708.1, the outer ends of the first telescopic brackets 708.2 penetrate through the wall surface of the holding frame 702 and extend out, and supporting rollers 708.3 which are vertically arranged are arranged at the outer ends of the first telescopic brackets 708.2;

preferably, two rows of supporting mechanisms 708 are arranged around the upper portion of the outer wall of the holding frame 702, each row of supporting mechanisms 708 includes four supporting mechanisms 708, and the four supporting mechanisms 708 are respectively located at the front side, the left side, the rear side and the right side of the holding frame 702.

A plurality of cleaning mechanisms 709 are annularly arranged at the lower part of the outer wall of the holding frame 702, the plurality of supporting mechanisms 708 are respectively arranged corresponding to the plurality of cleaning mechanisms 709 up and down, the cleaning mechanisms 709 include second guide seats 709.1 arranged along the radial direction of the holding frame 702, the outer ends of the second guide seats 709.1 are connected with the inner wall of the holding frame 702 through bolts, second telescopic brackets 709.2 are arranged in the second guide seats 709.1, second springs 709.4 are arranged between the inner ends of the second telescopic brackets 709.2 and the inner ends of the second guide seats 709.1, the outer ends of the second telescopic brackets 709.2 penetrate through the wall surface of the holding frame 702 and extend out, and cleaning blocks 709.3 are arranged at the outer ends of the second telescopic brackets 709.2;

preferably, four cleaning mechanisms 709 are provided, and the four cleaning mechanisms 709 are respectively located at the front side, the left side, the rear side and the right side of the holding frame 702;

the cleaning block 709.3 is coincident with the movement track of the supporting roller 708.3 in the lifting process of the dredging device 7, when the device descends, the cleaning block 709.3 can scrape obstacles such as algae and plants growing on the inner wall surface of the dredging channel 6 for the supporting roller 708.3, and the supporting roller 708.3 is ensured to play the role;

a special lifting appliance 710 is arranged on the top surface of the retaining frame 702, and the special lifting appliance 710 has a self-balancing function, so that the problem of uneven stress on each lifting point in the lifting process is solved, the stability of the lifting process of the dredging device 7 is ensured, and the operation safety is improved;

the dredging device 7 further comprises a mounting platform 701, the mounting platform 701 is fixedly connected to the ground through bolts, a mounting place is provided for the dredging device 7 to be unloaded, and a garbage transport trolley can be arranged below the mounting platform 701;

the bottom surface of the holding frame 702 is provided with a plurality of positioning pins 714, and the positioning pins 714 are used for positioning when the holding frame 702 is placed on the placing platform 701;

an electric retention frame 711 is arranged outside the holding frame 702, the electric retention frame 711 can enable an electric control system to still function when the dredging device 7 needs to be immersed into water for working, and is beneficial to the safe dredging operation of the dredging device 7, a cable lifting mechanism 712 and an electric control cabinet 713 are arranged on the outer wall of the electric retention frame 711, the cable lifting mechanism 712 comprises a cable reel 712.1 and a cable reversing wheel 712.2 which are arranged up and down, and the cable reel 712.1 is arranged on the outer wall of the electric retention frame 711 through a reel bracket 712.3;

the cable reel 712.1 adopts a motor-driven reel, and when the cable reel in the form is used for reeling a cable, the motor output torque is used as a reeling driving force to drive the reel to take up the cable; when the cable is released, the output torque of the motor becomes resistance to prevent the cable from quickly pulling the reel open, and the synchronism of the cable and the dredging device 7 is ensured.

A test method of a test platform for testing the performance of an online dredging device at the bottom of an external-in and internal-out type drum net comprises the following steps:

firstly, sea creatures such as green-lipped mussels, barnacles, silt and the like are prepared into deposition simulants according to a certain proportion and weight, the deposition simulants are thrown into a deposition hopper from a manhole door, the manhole door is closed, then water is injected into the deposition hopper and a dredging channel through a channel port of the dredging channel to a set water level, and the deposition condition in a flow channel deposition pit at the bottom of an external-in and internal-out type drum net can be simulated after the steps are completed;

the dredging device is hoisted into the dredging channel and slowly descends, the dredging device is started to test after the position reached by the dredging device is observed through an observation window, and meanwhile, a sedimentation hopper camera is used for shooting the whole underwater motion process of the dredging device and the quantity and state of sediments in the sedimentation hopper so as to obtain the motion rule and the dredging performance of the on-line dredging device at the bottom of the drum net and provide a reference basis for the improvement design of the equipment structure and the optimization of the operation parameters;

wherein, the theory of operation of desilting device:

the electric detention frame is left at the channel opening of the dredging channel, the maintaining frame is lowered along the dredging channel, when the electric detention frame is lowered to the position of the inlet and the outlet of the sedimentation hopper, the maintaining frame stops lowering, and the suction head continues to descend to the bottom of the sedimentation hopper;

starting suction dredging operation, leading the mixture of the sediment simulant and water to reach a graded filtering mechanism through a suction head, a suction pipeline, a suction center and a water flow speed reducing mechanism, carrying out multistage filtering on the sediment simulant with different size grades by the graded filtering mechanism, and sending a signal by the graded filtering mechanism detection switch because the graded filtering mechanism detection switch is arranged in the graded filtering mechanism, when the sediment simulant in a filter screen chamber close to an inlet reaches a set amount, suspending the suction dredging operation, and lifting a holding frame to a channel opening of a dredging channel to wait for sewage discharge;

the siltation simulants in the grading filtering mechanism enter the garbage collector under the action of gravity, and are discharged to a fixed storage point through the discharging mechanism.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a test platform of online sediment removal device performance in test outer type drum net bottom of advancing, its characterized in that: the sedimentation simulation device comprises a test foundation pit (1), wherein a plane supporting plate (2) is arranged at the top of the test foundation pit (1), a plurality of supporting columns (3) are arranged on the top surface of the plane supporting plate (2), an operating platform (4) is arranged between the top ends of the supporting columns (3), a sedimentation hopper (5) is arranged in the test foundation pit (1), the sedimentation hopper (5) is used for placing sedimentation simulation substances in various forms, the top surface of the sedimentation hopper (5) is higher than that of the plane supporting plate (2), a sedimentation hopper inlet and outlet is arranged on the top surface of the sedimentation hopper (5), a dredging channel (6) is downwards arranged on the operating platform (4), the bottom end of the dredging channel (6) is communicated with the sedimentation hopper inlet and outlet, a dredging device (7) is hoisted above a channel opening of the dredging channel (6), and the dredging device (7) can enter the sedimentation hopper (5) along the inner wall of the dredging channel (6), and (5) performing suction cleaning on the siltation simulants.

2. The test platform for testing the performance of the online dredging device at the bottom of the external-in and internal-out type drum net according to claim 1, wherein: the dredging device (7) comprises a holding frame (702), a dredging assembly is arranged in the holding frame (702), the dredging assembly comprises a suction mechanism (703), a water flow speed reducing mechanism (704), a grading filtering mechanism (705), a garbage collector (706) and a discharging mechanism (707) which are sequentially connected, the suction mechanism (703) and the grading filtering mechanism (705) are arranged on the left and right sides, the water flow speed reducing mechanism (704) is arranged between the suction mechanism (703) and the grading filtering mechanism (705), the garbage collector (706) and the discharging mechanism (707) are sequentially arranged below the grading filtering mechanism (705),

the suction mechanism (703) is used for sucking the siltation simulants, and the suction mechanism (703) comprises a suction center (703.1), a suction pipeline (703.2) and a suction head assembly (703.3) which are sequentially connected from top to bottom;

the water flow speed reducing mechanism (704) is used for carrying out speed reduction treatment on the water flow flowing through the interior of the water flow speed reducing mechanism;

the graded filtering mechanism (705) is used for carrying out graded filtering on the siltation simulants entrained in the water flow flowing through the graded filtering mechanism, the graded filtering mechanism (705) comprises a net cage (705.1), and a plurality of filter net chambers (705.3) are arranged in the net cage (705.1);

the garbage collector (706) is used for collecting the siltation simulants accumulated in the graded filtering mechanism (705);

the discharge mechanism (707) is configured to discharge the collected fouling simulant.

3. The test platform for testing the performance of the online dredging device at the bottom of the external-in and internal-out type drum net according to claim 1, wherein: and a manhole door (9) is arranged on the top surface of the sedimentation hopper (5).

4. The test platform for testing the performance of the online dredging device at the bottom of the external-in and internal-out type drum net according to claim 1, wherein: and a water drain valve (13) is arranged at the bottom of the sedimentation hopper (5).

5. The test platform for testing the performance of the online dredging device at the bottom of the external-in and internal-out type drum net according to claim 1, wherein: the inner wall of the sedimentation hopper (5) is provided with a plurality of sedimentation hopper cameras (17).

6. The test platform for testing the performance of the online dredging device at the bottom of the external-in and internal-out type drum net according to claim 1, wherein: the inner wall of the sedimentation hopper (5) is also provided with a plurality of exploring lamps (18).

7. The test platform for testing the performance of the online dredging device at the bottom of the external-in and internal-out type drum net according to claim 1, wherein: and a supporting roller guide seat (14) and an electric retention frame guide plate (15) are arranged at the passage opening of the dredging passage (6).

8. The test platform for testing the performance of the online dredging device at the bottom of the external-in and internal-out type drum net according to claim 1, wherein: and a sealing gasket (20) is arranged between the bottom end of the dredging channel (6) and the inlet and the outlet of the sedimentation hopper (5).

9. The test platform for testing the performance of the online dredging device at the bottom of the external-in and internal-out type drum net according to claim 1, wherein: and a guardrail (16) is arranged on the operating platform (4).

10. The test platform for testing the performance of the online dredging device at the bottom of the external-in and internal-out type drum net according to claim 1, wherein: one side of the plane supporting plate (2) is provided with a control cabinet (19) arranged on the ground.

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