HU231407B1 - Circuit arrangement and procedure for sampling from surface of bed of deeper surface waters - Google Patents

Description

Switching arrangement and procedure for taking samples from the bed surface of surface waters with greater water depth

The subject of the invention is a switching arrangement for taking samples from the bed surface of surface waters with a greater water depth.

The subject of the invention is also a method for taking samples from the bed surface of surface waters with greater water depth using the switching arrangement according to the invention.

The installed, automatically operating switching arrangement according to the invention is suitable for monitoring the contamination of loose sediment moving in the bed of surface waters.

Several solutions for sampling from the bed bottom are already known from literature and practice.

Such a solution is, for example, sampling with bed drilling, bed bottom sampling with a grab bucket, sediment collecting traps.

The equipment and tools used for such sampling can only be used with individual departures, they cannot be installed for long-term operation and cannot be automated.

A Natural Resources, 2013, 4, pages: 92-104. The article "Sedimentation in Mountain Streams: A Review of Methods of Measurement" published in the journal describes different sampling procedures and tools.

Some of the pollutants entering from the environment - mainly of industrial origin - are deposited in the fresh sediment at the bottom of the river bed and move along with the loose sediment moved by the water currents in the directions corresponding to the currents. The prediction of subsequent deteriorations in water quality is increasingly important from the point of view of the safety of water users (surface water works, fish farms, agricultural irrigation) and the biological community in the water.

After environmental pollution accidents, i.e. after unexpected, significant events that occur during human activity, endangering human health or the environment, the appearance of settled contaminants moving with the sediment and the evolution of their concentration over time must be monitored for environmental protection reasons.

SZTNH-100359864

Known solutions are not suitable for monitoring that takes into account many environmental protection aspects due to their following disadvantages:

a) they do not have an automatic sample delivery solution;

b) they cannot be installed for long-term monitoring, because they are buried at a rate depending on the conditions if they are not moved from the bed bottom.

We set ourselves the goal of developing a switching arrangement that eliminates the above disadvantages.

The switching arrangement according to our solution:

it consists of an automatically moving bed-bottom sampling unit installed for permanent operation, a sample transport unit, and the connected sampling unit installed on a shore or on a stable boat/pontoon;

it has a self-propelled bed unit moved on the bed bottom, which is equipped with rolling elements and holding elements;

the sampling location can be adjusted in a wide range by remote control;

the self-propelled bed unit can be programmed to protect against burial by sediment by moving it on the bed bed;

has a remote-operated lowering/raising sampling bell;

works on the slag suction principle, with an adjustable liquid suction speed; the sampler bell is equipped with a fluidization separator to avoid sand absorption;

the sampling bell is also equipped with a coarse sieve to separate larger pieces of material (leaves, snails, shells, branch pieces, other debris);

the total volume of absorbed sludge and water can be set to a value between 0.5 and 2 dm ³ ;

the position of the sampling bell connected to the bed bottom unit in the bed and the extent of its lowering can be adjusted.

The subject of the invention is a switching arrangement for taking samples from the bed surface of surface waters with a greater water depth.

The characteristic of the switching arrangement is that it has a self-propelled bed bottom unit equipped with rolling elements and holding elements, to which a drive motor unit is connected, the gj drive motor unit is connected to an anchor post through a connecting and protective pipes, through a flexible connecting element, which is capable of turning fi h

222781© is connected, the anchor post is equipped with a base, fixed in position with a pinch pin, the self-propelled bed bottom unit is connected to a sampling bell with a lifting arm, which is connected to a sample pump by a sample delivery pipe, the sample pump is connected by a sample delivery pipe to a sample receiving tank, which is mounted on a motorized tap is connected to a sample container via a sample delivery pipe, a sample receiving container is connected to a vacuum pump with a vacuum pipe, while the self-propelled bed bottom unit is connected to a hydraulic pump with a hydraulic pipe, it also has a control unit which is connected to the sample pump with electrical lines, the drive motor unit, with the hydraulic pump, motorized valve and vacuum pump.

In the switching arrangement, the sample delivery pipe, the sample receiving container, the motorized tap, the sample storage, the control unit, the vacuum pump, the vacuum tube, and the electric line are placed as internal elements of a central unit equipped with a cover.

The subject of the invention is also a method for taking samples from the bed surface of surface waters with greater water depth using the switching arrangement according to the invention.

The characteristic of the procedure is that the sampling bell is brought to the raised position with the lifting arm on the hydraulic cylinder by the pressure acting on it through the hydraulic tube, which is produced by the operation of the hydraulic pump, and then with the drive motor unit, with the help of the electric current connected to the electric line, a torque of variable direction is given the flexible drive connection element installed in the self-propelled bed unit, the torque of which is symmetrically transmitted to the rolling elements through the mechanical transmissions in the rolling unit, with which we move the self-propelled bed unit on the bed floor, preferably 0.5 — 1.0 m /min movement speed with the help of the hydraulic pipe so that the drive motor unit with the connecting and protective pipes connected to the anchor post moves the self-propelled bed bottom unit around the anchor post, then when the desired position is reached, the drive motor unit is stopped with the control unit and the sampling bell is bring it to the lowered position with the lifting lever, so that the hydraulic pump is stopped, the sampling bell preferably

3237816

It is allowed to sink to a depth of 50-150 cm, and then the sampling is carried out by operating the elements in the central unit as follows: the motorized tap is closed, the sample pump and the vacuum pump are started, then the loose sediment on the bottom surface of the bed standing on the support base is drawn through the suction openings carried by the liquid flow, it flows through the coarse sieve into the sample receiving tank, then after reaching a certain sludge level in the sample receiving tank, the sample pump and the vacuum pump are stopped, the sample container is placed at the end of the sample delivery pipe, then the motorized valve is opened and the sample container is removed.

The switching arrangement is shown in 1-3. shown in fig.

Figure 1 shows the schematic diagram of the switching arrangement.

Figure 2 is a schematic diagram of the self-propelled bed bottom unit and the connected sampling bell.

Figure 3 shows a sectional drawing of the sampling bell.

The switching arrangement shown in Figure 1 has a self-propelled bed bottom unit 1 to which a drive motor unit 2 is connected.

The drive motor unit 2 is rotatably connected to an anchor post 3 via a connecting, protective tube 4, through a flexible connecting element 1b.

In addition to connecting the 2 drive motor unit and the 3 anchor post, the 4 connecting and protective pipes are also used to protect the wires.

A base 6 is connected to the anchor column 3 in the position fixed by the pinch pin 15. A sampling bell 1c is connected to the self-propelled bed bottom unit 1 by a lever Id, which is connected to a sample pump 12a by a sample delivery pipe 5a.

The sample pump 12a is connected with a sample delivery pipe 5b, to a sample receiving tank 8, which is connected to a sample container 10 through a motorized tap 9, and a sample delivery pipe 5c.

The sample receiving container 8 is connected to a vacuum pump 12b with a vacuum tube 13.

The self-propelled bed unit 1 is connected to a hydraulic pump 16 with a hydraulic pipe 17

The switching arrangement has a control unit 11 which is connected by electrical lines 14a-14e to the sample pump 12a, drive motor unit 2, hydraulic pump 16, motor tap 9 and vacuum pump 12b.

The sample delivery pipe 5c, the sample receiving container 8, the motor tap 9, the sample storage 10, the control unit 11, the vacuum pump 12b, the vacuum pipe 13, the electric line 14e are placed as internal elements in a central unit 18 equipped with a cover 18a.

Figure 2 shows the schematic drawing of the self-propelled bed bottom unit 1 and the sampling bell 1c connected to it.

The self-propelled bed bottom unit 1 is provided with a rolling unit 19, which has a cover 22 and the bottom of which is provided with rolling elements 20 and holding elements 23 connected to their axis.

The drive motor unit 2 is connected to the self-propelled bed unit 1.

The rolling unit 19 includes the connecting, protective tube 4, to which the flexible drive connection element 1a is connected, for the transmission of the drive energy to the rolling elements 20 by means of mechanical transmissions.

The lever Id is connected to the sampling bell 1c via a hinge point 21c. A hydraulic cylinder 21 is connected to the lifting arm Id through a hinge point 21b, the lifting arm ki is connected to the rolling unit 19 with a hinge point 21a. The hydraulic cylinder 21 is equipped with a connecting hydraulic pipe 17.

The sample delivery pipe 5a connected to it is used to drain the sludge sample sucked through the sampling bell 1c.

The cover 22 protects the structural elements and is preferably streamlined.

Sectional diagram 2 shows the parts of sampling bell 1c.

On the lower edge of the bell body 24 of the sampling bell 1c, suction openings 25 are formed on the cylinder casing, evenly distributed in a circle.

A coarse screen 27 is connected to the wall of the bell body 24, while a support base 26 is connected to its lower edge.

The role of the coarse screen 27 is to prevent larger material pieces from entering the sample delivery tube 5a.

Example 1 shows the operation of the switching arrangement.

Example 1

The center of movement of the 1 self-propelled bed bottom unit of the sampling switching arrangement set in 150 cm deep water is determined by the 6 feet and the 3 anchor posts on 15 punching pins pressed into the solid bed bed.

The movement, sampling, and protection against burial functions of the switching arrangement, which can be operated with the help of wires and pipes by the 18 central units located on the waterfront or pontoon, are presented below.

Movement

The sampling bell 1c is brought to the raised position by the bell lifting arm by the pressure applied to the hydraulic cylinder 21, through the hydraulic pipe 17, which is produced by the operation of the hydraulic pump 16.

The drive motor unit 2, using the electricity connected to the electrical line 14b, provides a variable direction rotation torque to the flexible drive connection element la mounted on the self-propelled bed bottom unit 1 through the flexible connection element 1b.

This torque is transmitted symmetrically to the rolling elements 20 by the mechanical gears in the rolling unit 19.

They rest on the bed bottom and move the self-propelled bed bottom unit 1 on the bed bottom with the help of the holding elements 23 at a movement speed of 0.8 m/min. The self-propelled bed unit 1 with the drive motor unit 2 connected to it, which is connected to the anchor post 3 with the connecting and protective pipe 4, is received together with the hydraulic pipe 17, on the path around the anchor post 3.

The self-propelled bed unit 1 moves along the path of movement, around the 3 anchor posts, in a specific arc in a direction dependent on the polarity of the electricity.

On the movement path, the self-propelled bed unit 1 follows the surface of the bed bottom according to the degrees of freedom of movement created by the flexible drive connection element la and the flexible element 1b.

When the desired position is reached, the drive motor unit 2 stops and the sampling bell is brought to the lowered position by the lifting arm Id with the pressure transmitted from the hydraulic cylinder 21 through the hydraulic pipe 17, which is caused by stopping the operation of the hydraulic pump 16.

In the lowered position, the sampling bell 1c rests on the support base 26, which only allows the sampling bell 1c to sink down to the harder bed bottom, thereby ensuring selective sampling of the loose sediment.

Sampling

The amount of loose sediment under the sampling bell lowered to the bed is sampled by operating the units in the 18 central units installed on the shore in the following order:

a) blocking the 9 motor tap;

b) starting sample pump 12a and vacuum pump 12b, vacuum 20 kPa. The loose sediment on the bed surface below the bell body 24 standing on a support base 26 is swept by the liquid flow occurring at the suction openings 25 through the coarse sieve 27 through the sample transport elements 5a, sample pump 12a, and sample transport pipe 5b into the sample receiving tank 8;

c) after reaching the specified liquid level (sludge level) in the sample receiving tank 8, the sample pump 12a and the vacuum pump 12b are stopped.

d) the sample container 10 is placed at the end of the sample delivery tube 5c;

e) open the motor valve 9;

f) the 10 sample containers are removed.

Protection against burial

1 self-propelled bed bottom unit - depending on the condition of the bed and the water body, installation location, water circulation, amount of transported sediment, etc. depending on its parameters - at experimentally established time intervals, which in the case of this example is 30 minutes, the 1c sampler

27310 bells, in their raised state, are moved back and forth at least once in the two moving directions, at a distance of 50-100 cm.

When sampling in the method according to the invention, the parameter limits advantageously used are:

sinking depth of 1 self-propelled bed bottom unit: 100-200 cm;

suction speed: 1-3 1/min;

vacuum: 10 kPa-50 kPa;

movement speed: 0.5-1 m/min.

The advantages of the switching arrangement according to the invention are as follows.

it has 1 self-propelled bed unit moved on the bed bottom, equipped with 20 rolling elements and 23 holding elements;

the sampling location can be adjusted in a wide range by the control unit 11;

the 1 self-propelled bed unit can be programmed to protect against burial by alluvium on the bed bed;

has a remote-operated lowering/raising 1c sampler bell; works on the slag suction principle, with an adjustable liquid suction speed;

the bell of the sampler 1c is provided with a fluidization separating space to avoid sand absorption and the 27 coarse sieve to separate the grains and lumpy materials;

the position of the sampler bell 1c connected to the self-propelled bed bottom unit 1 in the bed and the extent of its sinking can be adjusted.

Claims (7)

1. Switching arrangement for sampling from the bed surface of surface waters in greater water depth, characterized by the fact that it has a self-propelled bed bottom unit (1) equipped with rolling elements (20) and holding elements (23), to which a drive motor unit (2) is connected, the drive motor unit (2) is rotatably connected to an anchor post (3) through a connecting, protective tubes (4) through a flexible connecting element (1b), the anchor post (3) is equipped with a base (6) fixed with a pinch pin (15) position, a sampling bell (1c) is connected to the self-propelled bed unit (1) with a lever (Id), which is connected to a sample pump (12a) by a sample delivery pipe (5a), the sample pump (12a) is connected to a sample delivery pipe (5b) to a sample receiving tank (8), which is connected to a sample container (10) via a motorized pin (9) with a sample delivery pipe (5c), the sample receiving tank (8) is connected to a vacuum pump (12b) with a vacuum pipe (13), while the self-propelled bed bottom unit (1) is connected to a hydraulic pump (16) with a hydraulic pipe (17), and also has a control unit (11), which is connected to the sample pump (12a) and drive motor unit (2) by electrical lines (14a-14e) , with the hydraulic pump (16), the motorized tap (9) and the vacuum pump 12b). 2. The switching arrangement according to claim I, characterized in that the sample delivery pipe (5c), the sample receiving container (8), the motorized tap (9), the sample container (10), the control unit (11), the vacuum pump (12b) , the vacuum tube (13), the electric line (14e) are placed as internal elements of a central unit (18) equipped with a cover (18a). 3. The switching arrangement according to claim 2, characterized in that a hydraulic cylinder is connected (21) to the lifting arm (ki) via a hinge point (21b). 4. The switching arrangement according to claim 3, characterized by the fact that the lifting arm (Id) is connected to the rolling unit "Η s MHIII" with a hinge point (21a) and gears. W SZTNH-100359865 2227828 (19), the hydraulic cylinder (21) is equipped with a connecting hydraulic pipe (17) which is connected to the hydraulic pump (16). 5. The switching arrangement according to claim 4, characterized by the fact that the self-propelled bed unit (1) has a cover (22) and a bell body (24), suction openings (25) are formed on the lower edge of the bell body (24) on the cylinder casing, a coarse sieve (27) is connected to the wall of the bell body (24), while a support base (26) is connected to its lower edge. 6. Method for sampling from the bed surface of surface waters with greater water depth using the switching arrangement according to claim 5, characterized by the fact that the sampling bell (1c) is brought to a raised position with the lifting arm (Id) with the hydraulic cylinder (21) through the hydraulic pipe With the effective pressure (17), which is produced by operating the hydraulic pump (16), the drive motor unit (2) with the help of electricity connected to the electric line (14b), we provide variable direction rotation torque to the flexible drive installed in the self-propelled bed bottom unit (1) -connecting element (la), which torque is symmetrically transmitted to the rolling elements (20) by means of the mechanical gears in the rolling unit (19), with which we move the self-propelled bed unit (1) on the bed bottom with the help of the holding elements (23) ) preferably with a movement speed of 0.5 - 1.0 m/min using the hydraulic pipe (17) so that the self-propelled bed unit (2) with the drive motor unit (2) connected to the anchor post (3) with the connecting protective pipe (4) ) is turned around the anchor post (3), then when the desired position is reached, the drive motor unit (2) is stopped with the control unit (11) and the sampling bell (1c) is brought to the lowered position with the lifting arm (Id), so that the hydraulic pump (16) ) is stopped, the sampling bell (le) is preferably allowed to sink to a depth of 50-150 cm, then the sampling is carried out by operating the elements in the central unit (18) as follows: the motorized tap (9) is closed, the sample pump (12a ) and the vacuum pump (12b) is started, then the loose, water-containing sediment on the bed surface below the bell body (24) standing on the support base (26) is swept by the liquid flow through the coarse sieve (27) into the sample receiving tank (8) through the suction openings (25) flows, then after reaching the defined sludge level in the sample receiving tank (8), the sample pump (12a) and the vacuum pump <0 W fs W (12b) is stopped, the sample container (10) is connected to the end of the sample delivery tube (5c), then the motorized tap (9) is opened and the sample container (10) is removed. 7. The method according to claim 6, characterized by the fact that the self-propelled bed unit (1) is moved at experimentally established intervals, preferably every 30 minutes, with the sampling bell (down) raised, alternately in the two directions of movement in a commuting manner at a distance of 50-100 cm - we fly back at least once.