CN110763514A

CN110763514A - Device for sampling underwater sludge

Info

Publication number: CN110763514A
Application number: CN201910999631.1A
Authority: CN
Inventors: 宋丽娜
Original assignee: Heze University
Current assignee: Heze University
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-02-07
Anticipated expiration: 2039-10-21
Also published as: CN110763514B

Abstract

A device for sampling underwater sludge comprises a sampling boat body, a storage battery, a charging socket, a power switch, a motor reduction mechanism driving propeller, an electromagnetic valve and a sampling mechanism, wherein the boat body is provided with an air storage tank and a water storage tank, the air inlet end of a first electromagnetic valve is connected with an air storage tank connecting pipe, the air outlet end of the first electromagnetic valve is connected with a water storage tank connecting pipe, there is the second solenoid valve at water storage tank lower middle part, and the rightmost side end of sample boat body is fluted, and the casing left part of two motor reduction gears drive screw is installed respectively in two recesses, and the backup pad is installed to middle part upper end between gas holder and the water storage tank, and the backup pad lower extreme is installed to the sampling mechanism upper end, and battery, socket, the five switch that charge are installed in the component box to be connected through the wire with sampling mechanism, solenoid valve, motor reduction gears drive screw. The invention reduces the labor intensity of sampling personnel and the risk of falling into water, and can conveniently sample underwater sludge in any position.

Description

Device for sampling underwater sludge

Technical Field

The invention relates to the field of acquisition equipment, in particular to a device for sampling underwater sludge.

Background

In an environment monitoring unit (such as a government environment protection department) or an environment protection responsible department of a production enterprise, a bottom sludge sample of a sewage pool or a sewage drainage ditch and the like is often required to be sampled, so that subsequent laboratory physicochemical analysis and test and sample preparation are realized, and various physicochemical data in sludge are obtained by the tested sample, so that powerful data support is provided for relevant measures (such as that test results show that the pollution discharge of production equipment exceeds standard, and the targeted rectification on the pollution discharge of the production equipment can be performed) made for relevant environmental protection departments.

Among the prior art, take a sample to the mud of bottoms such as effluent water sump or sewer, generally all be operating personnel with the sampling equipment who has the long handle take a sample, the operator both hands are through handle operation sampling equipment, make the lower extreme sample connection contact bottom of the pool or the ditch bottom etc. to take the shore with bottom mud for follow-up chemical examination and make ready through the sample connection. By adopting the operation mode, when the sewage pool or the sewage ditch with shallow depth and the like are sampled, when the sewage pool or the sewage ditch and the like are deep, the operation of sampling by holding the handle by hand is very inconvenient, and an operator is too close to the water edge and has the risk of falling into water; in addition, in practical operation, when sludge at the bottom of the tank or at the bottom of the trench needs to be sampled in order to obtain a result of sludge physicochemical data at the bottom of the tank or at the bottom of the trench, the operation mode cannot perform sampling operation due to the fact that the operation mode is far away from the bank, so that the environmental protection department cannot comprehensively and effectively obtain sludge physicochemical data at the bottom of the tank or at the bottom of the trench, and cannot provide more powerful data support for relevant environmental protection departments to make relevant measures.

Based on the above, it is particularly necessary to provide a device capable of conveniently sampling the bottom of the pool or the bottom of the ditch.

Disclosure of Invention

In order to overcome the defects that the existing equipment for sampling sludge at the bottom of a ditch, the bottom of a pool and the like is limited by a structure, the labor intensity of sampling personnel can be increased due to the fact that the existing equipment is operated by manpower, and the middle parts of the bottom of the pool, the bottom of the ditch and the like cannot be effectively sampled, the invention provides a boat body which can be controlled by the sampling personnel at the bank side, the boat body can be controlled to sink into the bottom of the pool, the bottom of the ditch and the like in a required sampling area according to needs, and further under the combined action of relevant parts, a sampling mechanism can sample the underwater sludge and can float on the water surface to feed the sampled sludge to the bank side after sampling is finished, so that the labor intensity of the sampling personnel is reduced, the risk of falling into water is reduced, and the underwater sludge sampling device can be used for conveniently sampling the sludge at any position of the bottom of the pool, the bottom of the ditch and the like.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a device for sampling underwater sludge comprises a sampling boat body, a storage battery, a charging socket, a power switch, a motor reducing mechanism driving propeller and an electromagnetic valve, and is characterized by also comprising a sampling mechanism, wherein the upper end of the right part of a cabin of the sampling boat body is respectively provided with an air storage tank and a water storage tank, the middle part of the upper end of the air storage tank is provided with an air adding nozzle, the upper right end of the rear side of the air storage tank and the upper left end of the rear side of the water storage tank are respectively provided with a connecting pipe, the air inlet end of a first electromagnetic valve is connected with the connecting pipe of the air storage tank, the air outlet end of the first electromagnetic valve is connected with the connecting pipe of the water storage tank, the lower middle part of the water storage tank is provided with a lower connecting pipe, the lower part of the lower connecting pipe is connected with the water inlet end of a second electromagnetic valve, the water outlet end of the second electromagnetic valve is provided with, the left parts of the shells of the two motor reducing mechanism driving propellers are respectively arranged in two grooves, the lower end of the middle part of a sampling boat body between a gas storage tank and a water storage tank is provided with an opening, the upper end of the middle part between the gas storage tank and the water storage tank is provided with a supporting plate, the upper end of the sampling mechanism is arranged at the lower end of the supporting plate, the lower part of the sampling mechanism is arranged on the opening at the lower end of the middle part of the sampling boat body, a storage battery, a charging socket and five power switches are arranged in an element box, the positive pole and the negative pole of the storage battery and two wiring ends of the charging socket and two wiring ends of a fifth power switch are respectively connected through wires, the positive pole of the storage battery is connected with one ends of a first power switch, a second power switch, a third power switch and a fourth power switch, the other ends of the first power switch, the second power, the negative pole of the storage battery is connected with the negative pole power input ends of the first set and the second set of motor reducing mechanisms driving the propeller, and the negative pole power input ends of the first electromagnetic valve and the second electromagnetic valve are connected through leads, the two ends of the first path of power output of the fifth power switch are respectively connected with the positive pole power input end and the negative pole power input end of the sampling mechanism through leads, and the two ends of the second path of power output of the fifth power switch are respectively connected with the positive pole power input end and the negative pole power input end of the sampling mechanism through leads.

And the wire connected with the sampling structure, the two electromagnetic valves and the two sets of motor reducing mechanisms to drive the propeller is sleeved in the waterproof hose.

Compressed air is added into the air storage tank of the sampling ship body, when no water exists in the water storage tank, the sampling ship body floats on the water surface, and when the water in the water storage tank is enough, the sampling ship body sinks to the bottom.

The charging socket is a coaxial power socket, the first, second, third and fourth power switches are toggle power switches, and the fifth power switch is a gear power switch with two input ends and two output ends.

The solenoid valve is a normally closed spool solenoid valve.

The sampling mechanism comprises a motor speed reducing mechanism, a screw rod and an internal threaded pipe, the sampling tube, fixed cylinder base, motor reduction gears is motor gear reducer, motor reduction gears's casing upper end is installed at the backup pad lower extreme, motor reduction gears's lower extreme power output shaft and the upper end of lead screw are installed together, the inside left and right sides of fixed cylinder base respectively has a rectangle guide way from top to bottom, install on sample ship middle part lower extreme trompil outside fixed cylinder base, the outer left and right sides of internal thread pipe respectively has a rectangle gib block, the internal thread pipe box is in fixed cylinder base, the twice gib block of internal thread pipe is located the inside left and right sides guide way of fixed cylinder base respectively, lead screw lower part external screw thread screw in the upper portion internal thread of internal thread pipe, the lower extreme at the internal thread pipe is installed to the sampling tube upper end, the external diameter of sampling tube is greater than the internal thread pipe external diameter, the lower extreme of sampling tube is.

The invention has the beneficial effects that: before the air storage tank is used, a user firstly adds compressed air into the air storage tank; then two sets of motor reducing mechanisms at the rear end of the sampling boat body are respectively controlled by a first power switch and a second power switch to drive a propeller to work, so as to control the movement track of the boat body, when the boat body reaches the water surface of a sampling area, an operator opens a fourth power switch and controls the working inner valve core of a second electromagnetic valve to be opened, after water enters a water storage tank through a water inlet and a water outlet pipe, the boat body sinks to the water bottom of a sampling water area, then the operator opens a fifth power switch forwards, the motor reducing mechanisms of the sampling mechanism drive an internal thread pipe to descend along a fixed cylinder base through a power output shaft and a screw rod and drive a sampling pipe to descend into bottom sludge, so that the sampling process is completed, after the operator opens a third power switch, compressed air in the water storage tank can enter the water storage tank to discharge water, and the boat body floats to the water surface, an operator controls the working mode of driving the propellers by two sets of motor reducing mechanisms at the rear end of the sampling boat body respectively by operating the first power switch and the second power switch, so that the boat body can run to the shore to be close to an operator, the operator can drag the boat body from the water surface, and a sampled sludge sample is obtained. The invention reduces the labor intensity of sampling personnel and the risk of falling into water, and can conveniently sample underwater sludge at any position such as the bottom of a pool, the bottom of a ditch and the like. Based on the above, the invention has good application prospect.

Drawings

The invention is further illustrated below with reference to the figures and examples.

FIG. 1 is a schematic diagram of the present invention.

FIG. 2 is a schematic view of the sampling mechanism of the present invention.

Fig. 3 is a circuit diagram of the present invention.

Detailed Description

As shown in figures 1 and 2, a device for sampling underwater sludge comprises a sampling boat body 1, a storage battery 2, a charging socket 3, a power switch 4, a motor reducing mechanism driving screw 5, an electromagnetic valve 6 and a sampling mechanism 7, wherein a square metal box body is respectively arranged at the left part and the right part of the upper right part of a cabin of the boat body 1, the left end box body is used as an air storage tank 101, the right end box body is used as a water storage tank 102, a gas adding nozzle 103 is arranged in the middle of the upper end of the air storage tank 101, the lower end exhaust port of the gas adding nozzle 103 is communicated with the inside of the air storage tank 101, a connecting pipe 104 communicated with the air storage tank 101 and the inside space of the water storage tank 102 is respectively welded at the right upper rear side of the air storage tank 101 and the left upper side of the rear side of the water storage tank 102, the internal thread of the air inlet end of a first electromagnetic valve 61 is connected with the external thread of the, a lower connecting pipe communicated with the inner space of the water storage tank 102 is arranged at the lower middle part of the water storage tank 102, the lower external thread of the lower connecting pipe is connected with the internal thread at the water inlet end of the second electromagnetic valve 62, a pipeline is arranged at the water outlet end of the second electromagnetic valve 62 to be used as a water inlet and outlet pipe 105, the lower part of the water inlet and outlet pipe 105 is positioned at the lower outer side of a hole (the lower middle part of the water storage tank 102) at the middle part of the right end of the sampling boat body 1, after the sampling boat body 1 is filled with water, the water inlet and outlet pipe 105 is positioned below the water surface, the front part and the rear part of the rightmost end of the sampling boat body are respectively provided with a cylindrical groove 106, the left part of a shell of the two motor reducing mechanism driving propellers 5 is respectively arranged in the two cylindrical grooves 106 through screw nuts, blades of the two motor reducing mechanisms driving the propellers 5 are positioned at the right end, the middle lower end, the upper end of the sampling mechanism 7 is arranged at the lower end of the supporting plate 108, the lower part of the sampling mechanism 7 is arranged on an opening 107 at the lower end of the middle part of the sampling boat, and the storage battery 2, the charging socket 3 and the five power switches 4 are arranged in the element box 8.

As shown in fig. 1 and 2, the wires connected with the sampling structure 7, the two electromagnetic valves 6 and the two sets of motor reducing mechanism driving propellers 5 are sleeved in the waterproof hose, the element box 8 is held by a sampling person, and the operating handles of the five power switches 4 and the jacks of the charging socket 3 are respectively positioned outside six openings at the upper end of the element box 8. Compressed air is added into the air storage tank 101 of the sampling boat body 1 through the air adding nozzle 103 and the air compressor, when no water exists in the water storage tank 102, the sampling boat body 1 floats on the water surface, and when the water in the water storage tank 102 is enough, the sampling boat body 1 sinks to the bottom. The sampling mechanism 7 comprises a motor reducing mechanism 701, a screw rod 702, an internal thread pipe 703, a sampling pipe 704 and a fixed barrel seat 705, the motor reducing mechanism 701 is a 12V motor gear reducer product of the brand-positive department, the upper end of a shell of the motor reducing mechanism 701 is arranged at the lower end of a supporting plate 108 through a screw nut, a lower end power output shaft of the motor reducing mechanism 701 is welded with the upper end of the screw rod 702, the left side and the right side of the interior of the fixed barrel seat 705 are respectively provided with a rectangular guide groove 706 from top to bottom, the outer side of the fixed barrel seat 705 is arranged on a lower end opening 107 in the middle of a sampling boat through the screw nut, the left side and the right side of the exterior of the internal thread pipe 703 are respectively provided with a rectangular guide strip 707 from top to bottom, the internal thread pipe 703 is sleeved in the fixed barrel seat 705, the two guide strips 707 of the internal thread pipe are respectively positioned in the left side and the right side, the upper end of the sampling pipe 704 is welded at the lower end of the internal thread pipe 703, the outer diameter of the sampling pipe 704 (internal middle hollow structure) is larger than the outer diameter of the internal thread pipe 703 (internal middle hollow structure) by 1cm, and the lower end of the sampling pipe 704 is higher than the horizontal position of the lower end of the sampling boat body 1 by about 2cm (the opening 107 at the lower end of the middle of the boat is positioned in the middle of the connecting plate protruding from the lower end of the middle of the boat, so that the opening 107 at the lower end of the middle of the sampling boat is higher than the.

As shown in FIG. 3, the specification of the battery G is 12V/20 Ah. The charging receptacle CZ is a coaxial power receptacle. The first, second, third and fourth power switches S1, S2, S3 and S4 are toggle power switches, and the fifth power switch S5 is a shift power switch having two

input terminals

1 and 2 pins, two output terminals 3 and 4 pins, and two

output terminals

5 and 6 pins. The motor reduction mechanism drives the propellers M1 and M2 to be MV-0214 in model number, the working voltage is 12V, and when the sampling boat runs, the motor reduction mechanism drives the blades of the propellers to rotate, so that the sampling boat body runs forward. The electromagnetic valves DC1 and DC2 are normally closed valve core electromagnetic valves of the brand Ministry, the working voltage is 12V, and the power is 1W. M3 is the motor reduction mechanism of the sampling mechanism. The positive and negative poles of the accumulator G are respectively connected with two terminals of a charging socket CZ, two

terminals

1 and 2 of a fifth power switch S5 through leads, the positive pole of the accumulator G is respectively connected with one ends of first, second, third and fourth power switches S1, S2, S3 and S4 through leads, the other ends of the first, second, third and fourth power switches S1, S2, S3 and S4 are respectively connected with the positive pole power input ends of a first set and a second set of motor reducing mechanisms driving propellers M1 and M2, the positive pole power input ends of a first electromagnetic valve DC1, a second electromagnetic valve DC1 and DC2 are respectively connected through leads, the negative pole of the accumulator G is connected with the negative pole power input ends of a first set and a second set of motor reducing mechanisms driving propellers M1 and M2, the negative pole power input ends of a first electromagnetic valve DC1, a second electromagnetic valve DC2 and the negative pole power input ends of a first power output end and a second power output end 3 and 4 of a fifth power switch S5 are respectively connected with the positive and negative pole power input ends of a sampling mechanism M3, the two 5 and 6 pins of the second power output of the fifth power switch S5 are respectively connected with the input ends of the negative and positive poles of the motor speed reducing mechanism M3 of the sampling mechanism through leads

As shown in fig. 1, 2 and 3, before the present invention is used, a user first adds compressed air into an air tank 101 through an air adding nozzle 103 by using an air compressor. After the sampling boat body 1 reaches a water area (such as a sewage pool) needing sampling, the sampling boat body 1 is placed on the water surface, then an operator controls two sets of motor reducing mechanisms at the rear end of the sampling boat body to drive the working modes of propellers M1 and M2 through a first power switch S1 and a second power switch S2 respectively, so that the motion track of the boat body 1 is controlled, and the boat body 1 can be ensured to reach the water surface of a sampling area; after the two power switches S1 and S2 are turned on simultaneously, the two sets of motor reducing mechanisms drive the propellers M1 and M2 to be electrified simultaneously to work, and then the two sets of motor reducing mechanisms drive the propeller blades of the propellers M1 and M2 to drive the boat body 1 to advance; when the power switch S1 is turned on only, only the motor reduction mechanism drives the propeller M1 to be powered on to work, so that the motor reduction mechanism drives the propeller blades of the propeller M1 to drive the boat body 1 to turn right, and when the power switch S2 is turned on only, only the motor reduction mechanism drives the propeller M2 to be powered on to work, so that the motor reduction mechanism drives the propeller blades of the propeller M2 to drive the boat body 1 to turn left; after the power switches S1 and S2 are turned off, the motor reducing mechanism drives the propellers M1 and M2 to do not work, and the boat body 1 stops fixing the water area; through the above, the operation that the line control boat body 1 moves to a required position at a longer distance is conveniently realized, and preparation is made for the next process. When the boat body 1 reaches the water surface of the sampling area, an operator opens a fourth power switch S4 to control a second electromagnetic valve DC2 to be electrified to work, an internal valve core of the second electromagnetic valve is opened, water enters the water storage tank 102 through the water inlet and outlet pipe 105 and the electromagnetic valve DC2 with the opened valve core, synchronously, the boat body 1 slowly sinks as the water in the water storage tank 102 slowly increases, and the boat body 1 sinks to the water bottom of the sampling water area after the water in the water storage tank 102 is full; then the operator closes the fourth power switch S4 and opens the fifth power switch S5 forward, so that the 1 and 2 feet of the power switch S5 are respectively communicated with the 3 and 4 feet, the positive and negative two-pole power output by the storage battery G enters the positive and negative two-pole power input end of the motor reducing mechanism motor M3 of the sampling mechanism, so that the power output shaft of the motor reducing mechanism of the sampling mechanism drives the screw rod 702 to rotate anticlockwise under the action of the motor M3 and the reducing gear thereof, the external thread of the screw rod 702 acts on the internal thread of the internal thread pipe 703, so that the internal thread pipe 703 moves downwards along the left and right side guide grooves 706 in the fixed cylinder seat through the rectangular guide strips 707 at the left and right sides thereof, the internal thread pipe enables the sampling pipe 704 at the lower part thereof to descend into the sludge at the bottom, the sludge is sleeved in the sampling pipe 704, because the lower part of the boat body 1 is in close contact with the sludge at the bottom, the boat body 1 has a certain weight, the density of underwater sludge, particularly water sludge which does not flow water or flows very little, can ensure that the sampling pipe 704 is inserted into the sludge for sampling, and the sludge after sampling is positioned in the sampling pipe 704 (the sampling pipe 704 has a certain height and has a small diameter), so that the influence of subsequent water flow is small, and the sludge after sampling can be ensured to be transported to the shore; the user turns on the fifth power switch S5 for about 10 seconds, turns off the power switch S5, and the depth of the sampling tube 704 penetrating into the sludge is about 6cm, so that the sampling depth requirement can be effectively met. After the sampling mechanism samples, an operator opens the fifth power switch S5 backwards, so that the 1 and 2 feet of the power switch S5 are communicated with the 5 and 6 feet respectively, positive and negative two-pole power output by the storage battery G enters the negative and positive two-pole power input ends of the motor M3 of the motor speed reducing mechanism of the sampling mechanism, so that the power output shaft of the motor speed reducing mechanism of the sampling mechanism drives the screw rod 702 to rotate clockwise under the action of the motor M3 and the speed reducing gear thereof, the external thread of the screw rod 702 acts on the internal thread of the internal thread pipe 703, so that the internal thread pipe 703 moves upwards along the left and right side guide grooves 706 inside the fixed cylinder seat through the left and right rectangular guide strips 707 of the internal thread pipe 703, the sampling pipe 704 at the lower part of the internal thread pipe 703 moves upwards, the power switch S5 is closed after about 10 seconds, the lower end of the sampling pipe 704 is higher than the horizontal position of the lower, ensures that the subsequent sludge is not easy to be washed by water and is beneficial to the movement of the boat body 1. After sampling is finished, an operator opens a third power switch S3 and a fourth power switch S4, two electromagnetic valves DC1 and DC2 are electrified to work, inner valve cores of the electromagnetic valves DC1 and DC2 are opened, then compressed air in the air storage tank 101 enters the water storage tank 102, water in the water storage tank 102 is discharged through the water inlet and outlet pipe 105, after 5 seconds, the operator closes the power switches S3 and S4, then the electromagnetic valves DC1 and DC2 are electrified, the inner valve cores of the electromagnetic valves are closed, water in the water storage tank 102 is basically discharged completely, meanwhile, external water is prevented from entering the water storage tank 102 again, and the boat body 1 floats on the water surface; then, an operator controls the two sets of motor reducing mechanisms at the rear end of the sampling boat body to drive the propellers M1 and M2 to work through operating the first power switch S1 and the second power switch S2 respectively, so that the boat body 1 can run to the shore to be close to an operator, the operator can drag the boat body 1 from the water surface, and then a sampled sludge sample in the sampling mechanism sampling pipe 704 is obtained, and a sample is provided for the subsequent physicochemical analysis of sludge. When the storage battery G is out of power, the storage battery G can be charged by inserting an external power supply charger plug into the charging socket CZ. In order to ensure the accuracy of the control time, a digital display timer can be arranged at the front end in the component box. In order to ensure that the boat body 1 runs reliably, the lead connected with the sampling structure 7, the two electromagnetic valves 6 and the two sets of motor reducing mechanisms driving the propeller 5 needs to ensure enough length. The invention reduces the labor intensity of sampling personnel and the risk of falling into water, and can conveniently sample sludge at any position such as the bottom of the pool, the bottom of a ditch and the like. Based on the above, the invention has good application prospect. The two electromagnetic valves 6, the two sets of motor reducing mechanisms driving the propeller 5 and the motor reducing mechanisms of the sampling mechanism have waterproof functions.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A device for sampling underwater sludge comprises a sampling boat body, a storage battery, a charging socket, a power switch, a motor reducing mechanism driving propeller and an electromagnetic valve, and is characterized by also comprising a sampling mechanism, wherein the upper end of the right part of a cabin of the sampling boat body is respectively provided with an air storage tank and a water storage tank, the middle part of the upper end of the air storage tank is provided with an air adding nozzle, the upper right end of the rear side of the air storage tank and the upper left end of the rear side of the water storage tank are respectively provided with a connecting pipe, the air inlet end of a first electromagnetic valve is connected with the connecting pipe of the air storage tank, the air outlet end of the first electromagnetic valve is connected with the connecting pipe of the water storage tank, the lower middle part of the water storage tank is provided with a lower connecting pipe, the lower part of the lower connecting pipe is connected with the water inlet end of a second electromagnetic valve, the water outlet end of the second electromagnetic valve is provided with, the left parts of the shells of the two motor reducing mechanism driving propellers are respectively arranged in two grooves, the lower end of the middle part of a sampling boat body between a gas storage tank and a water storage tank is provided with an opening, the upper end of the middle part between the gas storage tank and the water storage tank is provided with a supporting plate, the upper end of the sampling mechanism is arranged at the lower end of the supporting plate, the lower part of the sampling mechanism is arranged on the opening at the lower end of the middle part of the sampling boat body, a storage battery, a charging socket and five power switches are arranged in an element box, the positive pole and the negative pole of the storage battery and two wiring ends of the charging socket and two wiring ends of a fifth power switch are respectively connected through wires, the positive pole of the storage battery is connected with one ends of a first power switch, a second power switch, a third power switch and a fourth power switch, the other ends of the first power switch, the second power, the negative pole of the storage battery is connected with the negative pole power input ends of the first set and the second set of motor reducing mechanisms driving the propeller, and the negative pole power input ends of the first electromagnetic valve and the second electromagnetic valve are connected through leads, the two ends of the first path of power output of the fifth power switch are respectively connected with the positive pole power input end and the negative pole power input end of the sampling mechanism through leads, and the two ends of the second path of power output of the fifth power switch are respectively connected with the positive pole power input end and the negative pole power input end of the sampling mechanism through leads.

2. The device for sampling underwater sludge according to claim 1, wherein a wire connected with the sampling structure, the two electromagnetic valves and the two sets of motor reduction mechanisms driving propellers is sleeved in the waterproof hose.

3. The device of claim 1, wherein the compressed air is filled in the air storage tank of the sampling boat, when there is no water in the water storage tank, the sampling boat floats on the water surface, and when there is enough water in the water storage tank, the sampling boat sinks to the bottom.

4. The device of claim 1, wherein the charging socket is a coaxial power socket, the first, second, third and fourth power switches are toggle power switches, and the fifth power switch is a two-way power switch.

5. The device of claim 1, wherein the solenoid valve is a normally closed spool solenoid valve.

6. The device of claim 1, wherein the sampling mechanism comprises a motor reduction mechanism, a screw rod, an internal thread tube, a sampling tube, and a fixed cylinder base, the motor reduction mechanism is a motor gear reducer, the upper end of a housing of the motor reduction mechanism is mounted at the lower end of a support plate, a lower power output shaft of the motor reduction mechanism is mounted with the upper end of the screw rod, the left and right sides of the inside of the fixed cylinder base are respectively provided with a rectangular guide groove from top to bottom, the outside of the fixed cylinder base is mounted on an opening at the lower end of the middle part of the sampling boat, the left and right sides of the outside of the internal thread tube are respectively provided with a rectangular guide strip, the internal thread tube is sleeved in the fixed cylinder base, the two guide strips of the internal thread tube are respectively positioned in the left and right side guide grooves of the inside of the fixed cylinder base, the external thread at the lower part of the screw rod is, the external diameter of sampling tube is greater than internal thread pipe external diameter, and the lower extreme horizontal position height of sampling ship body is than to the lower extreme of sampling tube.