CN211595086U - River lake bottom mud pollution source collecting device - Google Patents

Abstract

The river and lake bottom mud pollution source collecting device comprises a first floating body platform, a bubble separation tank and a high-pressure water pump, wherein the spray frame comprises a high-pressure spray pipe set, a bubble release pipe set and a pesticide spraying pipe set, the bubble separation tank is respectively communicated with a self-suction type dissolved air pump and the bubble release pipe set through pipelines, the metering pump is respectively communicated with an automatic pesticide feeding device and the pesticide spraying pipe set through pipelines, and the high-pressure spray pipe set is communicated with the high-pressure water pump through a pipeline; the recycling box is respectively communicated with the fan and the sucking disc through pipelines. The utility model discloses can pass through processes such as separation, air supporting, collection, accomplish the reduction to pollutant in the sediment of rivers lake automatically, need not clear up out the silt of the sediment of rivers lake completely, for mechanical type desilting, can greatly reduce the treatment cost, shorten the treatment cycle, greatly reduced the silt that mechanical type desilting cleared up simultaneously and the secondary treatment expense that brings.

Description

River lake bottom mud pollution source collecting device

Technical Field

The utility model belongs to the technical field of river lake environment improvement and specifically relates to river lake bed mud pollution sources collecting device.

Background

Organic substances deposited in a sludge layer formed at the bottom of a river or lake can cause biological anaerobic fermentation, and a water body becomes turbid and smells, and the organic substances are main factors for generating black and smelly water bodies and blue algae. Mechanical dredging can improve water quality relatively fast, but need to flow water to other places before the desilting, and whole desilting engineering cost is big, the cycle is long. If the drainage is not performed in advance, the dredging is performed directly, and during dredging, a large amount of deposited organic substances easily enter the water body due to disturbance of sludge, so that the stability of the water body ecological system is influenced. When the desilting operation is stopped, the organic pollutants are restored to be precipitated into the bottom sediment of the water body, and the pollution source is continuously released. In addition, the cleaned sludge is solid waste, and secondary treatment such as filter pressing, landfill and the like has high cost and difficulty.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a river lake bed mud pollution sources collecting device, it can be through processes such as separation, air supporting, collection, accomplish the reduction to pollutant in the river lake bed mud.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme: the river and lake bottom mud pollution source collecting device comprises a first floating body platform, a bubble separation tank and a high-pressure water pump;

an automatic chemical feeding device, a recycling box, a self-suction type dissolved air pump, a spraying frame, a metering pump, a fan and a sucker are respectively arranged on the first floating body platform;

the spraying frame comprises a high-pressure spraying pipe group, a bubble releasing pipe group and a pesticide spraying pipe group;

the bubble separation tank is respectively communicated with the self-suction type dissolved air pump and the bubble release pipe group through pipelines;

the metering pump is respectively communicated with the automatic dosing device and the pesticide spraying pipe group through pipelines;

the high-pressure jet pipe group is communicated with the high-pressure water pump through a pipeline;

the recycling box is respectively communicated with the fan and the sucking disc through pipelines.

The utility model has the advantages that: the utility model can generate high pressure water flow to separate organic matters and impurities in the river and lake bottom mud from the bottom mud; the utility model can generate micro-nano bubbles, because the organic matters separated from the bottom mud of rivers and lakes and the hydrophobic particles in impurities are easy to adhere to the surface of the bubbles, the density of the bubbles is far smaller than that of water, and the organic matters and the impurities separated from the bottom mud of rivers and lakes can be brought to the water surface by the micro-nano bubbles through the air floatation principle; the utility model can add coagulant into water to make organic colloid particles in water form floc, which has a net structure and can intercept micro-nano bubbles more easily, thereby providing air floatation efficiency; the utility model discloses can produce suction to absorb and collect the pollutant of suspension on the surface of water through suction. The utility model discloses can pass through processes such as separation, air supporting, collection, accomplish the reduction to pollutant in the sediment of rivers lake automatically, need not clear up out the silt of the sediment of rivers lake completely, for mechanical type desilting, can greatly reduce the treatment cost, shorten the treatment cycle, greatly reduced the silt that mechanical type desilting cleared up simultaneously and the secondary treatment expense that brings.

Drawings

FIG. 1 is a front view of the present invention; FIG. 2 is a top view of FIG. 1; FIG. 3 is a sectional view taken along line A-A of FIG. 1; fig. 4 is a perspective view of the present invention; FIG. 5 is a schematic view of the configuration of the bubble separation tank; FIG. 6 is a schematic view of the recycling bin configuration; fig. 7 is a schematic view of the spray frame structure.

Detailed Description

The river and lake bottom mud pollution source collecting device is shown in figures 1-7,

comprises a first floating body platform 1, a bubble separation tank 2 and a high-pressure water pump 3; the first floating body platform 1 can float on the water surface through a floating barrel; the bubble separation tank 2 may be placed on the first buoyant platform 1; the high-pressure water pump 3 is a submersible pump and can be placed in the water body of rivers and lakes.

An automatic chemical feeding device 4, a recovery box 5, a control cabinet 6, a self-suction type dissolved air pump 7, a spray frame 8, a metering pump 9, a fan 10 and a sucker 11 are respectively arranged on the first floating body platform 1; the first buoyant platform 1 serves to carry the respective equipment. People can drag the first floating platform 1 to move on the shore through the rope, thereby removing the bottom mud pollution sources in different water areas. The bottom of the first floating body platform 1 can be provided with a groove, and the sucker 11 is positioned in the groove at the bottom of the first floating body platform 1, so that the sucker 11 can be close to the water surface when the first floating body platform 1 floats on the water surface. The automatic medicine adding device 4 is of an existing structure.

The spray frame 8 comprises a high-pressure spray pipe group, a bubble release pipe group and a pesticide spraying pipe group; the spraying frame 8 integrates all the pipe groups together, and the conveying is convenient.

The bubble separation tank 2 is respectively communicated with a self-suction dissolved air pump 7 and a bubble release pipe group through pipelines; air is pressurized and melted into water through a self-suction type dissolved air pump 7 to be saturated into dissolved air water, the dissolved air water enters a bubble separation tank 2 to complete the separation process of large bubbles, and when the dissolved air water without the large bubbles enters a river and lake water body through a bubble release pipe group and is decompressed, micro-nano bubbles are released.

The metering pump 9 is respectively communicated with the automatic dosing device 4 and the pesticide spraying pipe group through pipelines; the coagulant is filled in the automatic dosing device 4, the coagulant is polyaluminium chloride, and the coagulant enters the water body through the metering pump 9 and the pesticide spraying pipe group, so that organic colloid particles in the water body are formed into flocs, the flocs have a net structure, micro-nano bubbles are easier to intercept, and the air floatation efficiency is improved.

The high-pressure jet pipe group is communicated with the high-pressure water pump 3 through a pipeline; the high-pressure water pump 3 generates high-pressure water, and the high-pressure water is sprayed to the bottom mud of the rivers and the lakes through the high-pressure spraying pipe group, so that organic matters and impurities in the bottom mud of the rivers and the lakes are separated from the bottom mud and float upwards.

The recycling box 5 is respectively communicated with the fan 10 and the sucking disc 11 through pipelines; the fan 10 provides suction which acts on the water surface through the recovery tank 5 and the suction cup 11 to absorb contaminants suspended on the water surface, the contaminants and the water being sucked into the recovery tank 5 by the suction, the recovery tank 5 being capable of filtering and discharging the water.

The utility model can generate high pressure water flow to separate organic matters and impurities in the river and lake bottom mud from the bottom mud; the utility model can generate micro-nano bubbles, because the organic matters separated from the bottom mud of rivers and lakes and the hydrophobic particles in impurities are easy to adhere to the surface of the bubbles, the density of the bubbles is far smaller than that of water, and the organic matters and the impurities separated from the bottom mud of rivers and lakes can be brought to the water surface by the micro-nano bubbles through the air floatation principle; the utility model can add coagulant into water to make organic colloid particles in water form floc, which has a net structure and can intercept micro-nano bubbles more easily, thereby providing air floatation efficiency; the utility model discloses can produce suction to absorb and collect the pollutant of suspension on the surface of water through suction. The utility model discloses can pass through processes such as separation, air supporting, collection, accomplish the reduction to pollutant in the sediment of rivers lake automatically, need not clear up out the silt of the sediment of rivers lake completely, for mechanical type desilting, can greatly reduce the treatment cost, shorten the treatment cycle, greatly reduced the silt that mechanical type desilting cleared up simultaneously and the secondary treatment expense that brings.

As shown in fig. 5, the bubble separation tank 2 includes a tank body 21;

a dissolved air water inlet pipe 22 and a dissolved air water outlet pipe 23 are respectively arranged in the tank body 21,

one end of a dissolved gas water inlet pipe 22 penetrates out of the bottom of the tank body 21 and is communicated with the self-suction dissolved gas pump 7 through a pipeline, the other end of the dissolved gas water inlet pipe 22 is positioned in the tank body 21, one end of a dissolved gas water outlet pipe 23 is positioned in the tank body 21, and the other end of the dissolved gas water outlet pipe 23 penetrates out of the side part of the tank body 21 and is communicated with the bubble release pipe group through a pipeline;

the upper part of the tank body 21 is provided with an air outlet pipe 24 which is communicated with the tank body, and the air outlet pipe 24 is provided with an overflow valve. The relief valve is not shown in the figure.

The bubble separation tank 2 can also be an existing large bubble separation device.

The dissolved air water generated by the self-suction type dissolved air pump 7 enters the tank body 21 through the dissolved air water inlet pipe 22 and then flows out through the dissolved air water outlet pipe 23, in the flowing process of the dissolved air water in the tank body 21, large bubbles in the dissolved air water float upwards and flow out through an overflow valve on the air outlet pipe 24, and the dissolved air water cannot flow out through the overflow valve, so that the large bubbles in the dissolved air water are removed, the bubbles are fine and are dispersed uniformly, and the air floatation effect is improved. The dissolved gas water inlet pipe 22 and the dissolved gas water outlet pipe 23 can adopt an L-shaped design, and can prolong the flow path of the dissolved gas water, improve the retention time of the dissolved gas water and fully remove large bubbles.

As shown in fig. 6, the recycling bin 5 includes a bin body 501;

one side of the box body 501 is provided with a water inlet 503 which is communicated with the sucker 11 through a pipeline;

the other side of the box body 501 is respectively provided with and communicated with an air suction opening 510 and a water outlet 516, and the air suction opening 510 is communicated with the fan 10;

a separation net 502 is arranged in the box body 501, a recovery basket 515 is arranged on the separation net 502, the recovery basket 515 is positioned between the water inlet 503 and the water outlet 516, the recovery basket 515 is of a box body structure with an opening at the upper part, a plurality of vertical baffles are arranged in the recovery basket 515, and the side walls and the baffles of the recovery basket 515 are screen meshes;

the box body 501 is internally provided with a lower baffle 512, the lower baffle 512 is positioned between the water inlet 503 and the air suction opening 510, the side walls of two sides of the width direction of the lower baffle 512 are respectively contacted with the inner walls of two sides of the box body 501, one end of the length direction of the lower baffle 512 is connected with the side wall of the box body 501, the other end of the length direction of the lower baffle 512 is connected with one end of the filter screen 507, and the other end of the filter screen 507 is connected with the side wall of.

The fan 10 provides suction to the suction cup 11, suspended matters are sucked into the box body 501 through the suction cup 11 and the pipeline and then fall into the recovery basket 515, and water passes through the recovery basket 515, falls below the separation net 502 and is discharged directly or through a water outlet pipeline through the water outlet 516. The lower partition 512 can block water from entering the suction opening 510, and the filter net 507 can block suspended matters from entering the suction opening 510 and can allow suction to pass through, so as to filter the suspended matters. This configuration automatically collects the suspended matter, which enters the tank 501 and falls into the recovery basket 515, and the water is filtered out. The structure automatically absorbs the pollutants suspended on the water surface through the sucking disc 11, so that the pollutant cleaning effect is good, time and labor are saved, and the cleaning efficiency is high. The water inlet 503 can be a plurality of, and every water inlet 503 all communicates with sucking disc 11 through the pipeline to can be under the sufficient condition of suction, the pollutant that suspends on the multiple waters of suction simultaneously, improved the clearance effect greatly.

The recovery tank 5 may be configured by a conventional screen or the like capable of filtering water.

As shown in fig. 6, an upper partition plate 511 is arranged in the box body 501, the upper partition plate 511 is located above the lower partition plate 512, side walls of two sides of the upper partition plate 511 in the width direction are respectively contacted with inner walls of two sides of the box body 501, one end of the upper partition plate 511 in the length direction is hinged with the inner wall of the box body 501, a long strip-shaped adjusting hole is formed in the other end of the upper partition plate 511 in the length direction, a screw rod 504 is arranged in the adjusting hole, the screw rod 504 is arranged on the lower partition plate 512, two nuts are arranged on the screw rod 504 in a matched manner, the diameters of the two nuts are larger than the. This structure enables the upper partition plate 511 to swing up and down to adjust the distance between the upper partition plate 511 and the lower partition plate 512, and the relative position is fixed by a nut, thereby enabling the magnitude of the suction force to be adjusted.

As shown in fig. 6, an air inlet filter 508 is disposed between the box 501 and the air inlet 510. The suction inlet screen 508 prevents contaminants from entering the suction inlet 510 from the tank 501.

As shown in fig. 6, a plurality of inclined hopper plates 513 are arranged in the box body 501, the plurality of hopper plates 513 are connected end to form a trumpet shape with a large diameter end facing upwards, and the plurality of hopper plates 513 are all positioned between the water inlet 503 and the recovery basket 515. The bucket plate 513 can play a guiding role, so that the pollutants falling into the box body 501 can accurately fall into the recovery basket 515.

As shown in fig. 7, the high pressure injection pipe set may have various structures, and preferably has a water inlet pipe 801, a first connecting pipe 805 and a plurality of injection pipes 809 which are sequentially communicated, wherein the water inlet pipe 801 is communicated with the high pressure water pump 3 through a pipeline; the plurality of nozzles 809 can disperse and spray high pressure water to expand a treatment range of the sludge. The high-pressure jet pipe group can also be a shower-shaped nozzle.

As shown in fig. 7, the bubble releasing tube group may have various structures, and preferably has an inlet tube 802, a second connecting tube 806 and a plurality of releasing tubes 810 which are sequentially communicated, wherein the inlet tube 802 is communicated with the bubble separation tank 2 through a pipeline; the plurality of release pipes 810 can expand the distribution range of the bubbles, facilitating the capture of the contaminants by the bubbles. The bubble release tube set can also be a common water tube or a single release tube.

As shown in fig. 7, the medicine sprinkling pipe group can have various structures, and preferably comprises a medicine inlet pipe 803, a third connecting pipe 807 and a plurality of medicine sprinkling pipes 811 which are sequentially communicated, wherein the medicine inlet pipe 803 is communicated with the metering pump 9 through a pipeline; the plurality of the medicine sprinkling pipes 811 can enlarge the distribution range of the coagulant and facilitate the flocculation of more pollutants. The spraying pipe group can also be a common water pipe or a shower-shaped spray head.

Both ends of first connection pipe 805, second connection pipe 806, and third connection pipe 807 are closed.

As shown in fig. 7, the spray frame 8 further includes two fixing frames 804, and the two fixing frames 804 are respectively and fixedly connected to two ends of the first connecting pipe 805, the second connecting pipe 806 and the third connecting pipe 807. The fixing frame 804 can support and fix the three connecting pipes, and relative movement among the three connecting pipes is avoided.

As shown in FIG. 7, the end of the release tube 810 is disposed in communication with one end of an elbow 812; the structure can further enlarge the distribution range of the bubbles, and facilitates the capture of pollutants through the bubbles.

As shown in fig. 7, a nozzle 813 is arranged at the end of the spray pipe 809. The structure can improve the pressure and the flow velocity of water, and is convenient for treating the bottom mud.

As shown in fig. 1-4, a first runner 12 and a second runner 13 are respectively and rotatably mounted on the first floating platform 1;

one end of a first screw 16 is arranged in the first rotating wheel 12 through internal threads, and the other end of the first screw 16 is rotatably connected with the spraying frame 8;

one end of a second screw rod 17 is arranged in the second rotating wheel 13 through internal threads, and the other end of the second screw rod 17 is rotatably connected with the sucking disc 11.

The structure can adjust the distance between the spraying frame 8 and the sucker 11 relative to the first floating body platform 1 by rotating the rotating wheel, namely, the water inlet depth of the spraying frame 8 and the distance between the sucker 11 and the water surface are adjusted, so that sediment can be impacted and pollutants on the water surface can be sucked conveniently.

As shown in fig. 1-4, a second buoyant platform 14 is provided at the bottom of the bubble separation tank 2. Because the bubble separation tank 2 always has the water that dissolves gas water and passes through and the inside storage is partly, the dead weight is great, is not suitable for the removal, when placing it on first body platform 1, makes first body platform 1 lose balance easily. The second buoyant platform 14 can be carried solely for movement of the bubble separation tank 2 above the water surface. When it is desired to move the bubble separation tank 2, a rope may be provided at the shore and connected to the second buoyant platform 14 by the rope, so that the bubble separation tank 2 can be moved by pulling the rope.

As shown in fig. 1-4, rollers 15 are arranged at the bottom of the first floating body platform 1. The wheels 15 can facilitate movement of the first buoyant platform 1 on the ground or on shore. And fences are arranged around the top of the first floating body platform 1. The enclosure can avoid equipment on the first floating platform 1 from falling into the water after inclining.

As shown in fig. 1-4, a through hole is arranged in the middle of the first floating platform 1;

the spraying frame 8 is positioned right below the through hole;

the suction cup 11 is located between the through hole and the spray frame 8.

This configuration enables the suction cup 11 to be brought into close proximity to the surface of the water when the first buoyant platform 1 is floating on the surface of the water. And the gravity center of the first floating body platform 1 can be consistent with the gravity centers of the spraying frame 8 and the sucking disc 11, so that the first floating body platform 1 can run stably.

As shown in fig. 1, 3 and 4, the bottom of the first floating platform 1 is provided with an annular fixed cover 18;

the suction cup 11 is located within the fixed housing 18.

The fixed cover 18 is located in the air floatation area, which can prevent the diffusion of pollutants and facilitate the suction of the suction cup to collect the pollutants.

As shown in fig. 1-3, a control cabinet 6 is mounted on the first floating platform 1;

and the control cabinet 6 is respectively connected with the high-pressure water pump 3, the automatic chemical feeding device 4, the self-suction type dissolved air pump 7, the metering pump 9 and the fan 10.

The control cabinet 6 can send instructions to the high-pressure water pump 3, the automatic chemical feeding device 4, the self-suction type dissolved air pump 7, the metering pump 9 and the fan 10 through a set program or by real-time control of people so as to drive each device to start or stop working and the like.

In the drawings attached to the present specification, the respective pipes are not shown for clarity of showing more parts.

Technical scheme of the utility model not be restricted to the utility model the within range of embodiment. The technical contents not described in detail in the present invention are all known techniques.

Claims (9)

1. River lake bed mud pollution sources collecting device, its characterized in that:

comprises a first floating body platform (1), a bubble separation tank (2) and a high-pressure water pump (3);

an automatic chemical feeding device (4), a recovery box (5), a self-suction type dissolved air pump (7), a spray frame (8), a metering pump (9), a fan (10) and a sucker (11) are respectively arranged on the first floating body platform (1);

the spray frame (8) comprises a high-pressure spray pipe group, a bubble release pipe group and a pesticide spraying pipe group;

the bubble separation tank (2) is respectively communicated with a self-suction type dissolved air pump (7) and a bubble release pipe group through pipelines;

the metering pump (9) is respectively communicated with the automatic dosing device (4) and the pesticide spraying pipe group through pipelines;

the high-pressure jet pipe group is communicated with a high-pressure water pump (3) through a pipeline;

the recycling box (5) is respectively communicated with the fan (10) and the sucker (11) through pipelines; and a second floating platform (14) is arranged at the bottom of the bubble separation tank (2).

2. The river and lake bottom mud pollution source collecting device of claim 1, wherein:

the bubble separation tank (2) comprises a tank body (21);

a dissolved air water inlet pipe (22) and a dissolved air water outlet pipe (23) are respectively arranged in the tank body (21),

one end of the dissolved gas water inlet pipe (22) penetrates through the bottom of the tank body (21) and is communicated with the self-suction dissolved gas pump (7) through a pipeline, the other end of the dissolved gas water inlet pipe (22) is positioned in the tank body (21), one end of the dissolved gas water outlet pipe (23) is positioned in the tank body (21), and the other end of the dissolved gas water outlet pipe (23) penetrates through the side part of the tank body (21) and is communicated with the bubble release pipe group through a pipeline;

the upper part of the tank body (21) is provided with an air outlet pipe (24) which is communicated with the tank body, and the air outlet pipe (24) is provided with an overflow valve.

3. The river and lake bottom mud pollution source collecting device of claim 1, wherein:

the recovery box (5) comprises a box body (501);

one side of the box body (501) is provided with a water inlet (503) and communicated with the water inlet (503), and the water inlet (503) is communicated with the sucker (11) through a pipeline;

the other side of the box body (501) is respectively provided with and communicated with an air suction opening (510) and a water outlet (516), and the air suction opening (510) is communicated with the fan (10);

a separation net (502) is arranged in the box body (501), a recovery basket (515) is arranged on the separation net (502), the recovery basket (515) is positioned between the water inlet (503) and the water outlet (516), the recovery basket (515) is of a box body structure with an opening at the upper part, a plurality of vertical baffles are arranged in the recovery basket (515), and the side wall and the baffles of the recovery basket (515) are screens;

a lower partition plate (512) is arranged in the box body (501), the lower partition plate (512) is located between the water inlet (503) and the air suction opening (510), the side walls of the two sides of the width direction of the lower partition plate (512) are respectively contacted with the inner walls of the two sides of the box body (501), one end of the length direction of the lower partition plate (512) is connected with the side wall of the box body (501), the other end of the length direction of the lower partition plate (512) is connected with one end of a filter screen (507), and the other end of the filter screen (507) is connected with the side wall of.

4. The river and lake bottom mud pollution source collecting device of claim 3, wherein:

box (501) in set up baffle (511), go up baffle (511) and be located baffle (512) top down, the both sides lateral wall of going up baffle (511) width direction touches with the inner wall of box (501) both sides respectively, the one end of going up baffle (511) length direction is articulated with box (501) inner wall, the regulation hole of rectangular shape is seted up to the other end of going up baffle (511) length direction, set up screw rod (504) in the regulation hole, screw rod (504) are installed under on baffle (512), two nuts of cooperation installation on screw rod (504), the diameter of two nuts is greater than the width in regulation hole, two nuts are located baffle (511) both sides respectively.

5. The river and lake bottom mud pollution source collecting device of claim 1, wherein:

the high-pressure jet pipe group is provided with a water inlet pipe (801), a first connecting pipe (805) and a plurality of jet pipes (809) which are sequentially communicated, and the water inlet pipe (801) is communicated with the high-pressure water pump (3) through a pipeline;

the bubble release pipe group is provided with a liquid inlet pipe (802), a second connecting pipe (806) and a plurality of release pipes (810) which are sequentially communicated, and the liquid inlet pipe (802) is communicated with the bubble separation tank (2) through a pipeline;

the pesticide spraying pipe group is provided with a pesticide inlet pipe (803), a third connecting pipe (807) and a plurality of pesticide spraying pipes (811) which are sequentially communicated, and the pesticide inlet pipe (803) is communicated with the metering pump (9) through a pipeline;

both ends of the first connection pipe (805), the second connection pipe (806), and the third connection pipe (807) are closed.

6. The river and lake bottom mud pollution source collecting device of claim 1, wherein:

a first runner (12) and a second runner (13) are respectively rotatably arranged on the first floating body platform (1);

one end of a first screw rod (16) is arranged in the first rotating wheel (12) through internal threads, and the other end of the first screw rod (16) is rotatably connected with the spraying frame (8);

one end of a second screw rod (17) is installed in the second rotating wheel (13) through internal threads, and the other end of the second screw rod (17) is rotatably connected with the sucker (11).

7. The river and lake bottom mud pollution source collecting device of claim 1, wherein:

the bottom of the first floating body platform (1) is provided with a roller (15);

and fences are arranged around the top of the first floating body platform (1).

8. The river and lake bottom mud pollution source collecting device of claim 1, wherein:

the middle part of the first floating body platform (1) is provided with a through hole;

the spraying frame (8) is positioned right below the through hole;

the sucking disc (11) is positioned between the through hole and the spraying frame (8).

9. The river and lake bottom mud pollution source collecting device of claim 1, wherein:

an annular fixed cover (18) is arranged at the bottom of the first floating body platform (1);

the sucker (11) is positioned in the fixed cover (18).

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