CN215339399U

CN215339399U - Throwing and collecting equipment for DGT probes of sediments in different water depths

Info

Publication number: CN215339399U
Application number: CN202121870291.1U
Authority: CN
Inventors: 柴蓓蓓; 雷晓辉; 卓天宇; 龙岩; 康爱卿; 陈彬
Original assignee: Hebei University of Engineering
Current assignee: Hebei University of Engineering
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2021-12-28
Anticipated expiration: 2031-08-11

Abstract

The utility model discloses a throwing and collecting device for DGT probes of sediments in different water depths, which comprises the DGT probes, a container, a length-adjustable operating rod and a mud door opening and closing control assembly, wherein the DGT probes are fixed in the container through an upper pin shaft, an upper cover plate is arranged at the upper end of the container, two sides of the length-adjustable operating rod penetrate through the upper cover plate, a lower cover plate is arranged at the lower end of the container, and the lower cover plate is divided into a left cover plate and a right cover plate and is respectively matched with the lower end of the container through the mud door opening and closing control assembly. The utility model can realize the arrangement and in-situ fixation of the DGT probes of the muddy water interface of the reservoirs in different water depths for 24 hours, and can complete the sampling of the muddy water interface under the condition of ensuring that the muddy water interface is not disturbed.

Description

Throwing and collecting equipment for DGT probes of sediments in different water depths

Technical Field

The utility model belongs to the technical field of scientific measuring devices for lake reservoir water environments, and particularly relates to a throwing and collecting device for DGT probes of sediments in different water depths.

Background

As a potential phosphorus source of a water body, the sediments in the lake reservoir are valued by the researchers, and are very important for the in-situ research of the sediments. At present, most of research on sediments focuses on laboratory simulation, in-situ research is less, and the original state of the sediments is easy to damage when the sediments are sampled, and the mud-water interface changes due to factors such as disturbance, so that the in-situ information of the sediments is difficult to obtain.

The film Diffusion Gradient (DGT) is an in-situ collection technology, and in-situ information such as (biological) effective state content, ionic state-complex state binding kinetics and solid-liquid exchange kinetics of a target in an environmental medium is obtained by inserting a DGT probe into a deposit and performing gradient diffusion on the target in a diffusion layer and a buffer kinetic process of the target by utilizing a free diffusion principle (Fick first law).

Although the DGT technology has the advantages of measuring the in-situ data of the muddy water interface, high measuring resolution (300dpi) and the like, certain difficulties exist in the in-situ feeding, fixing and undisturbed muddy water interface acquisition of the DGT probe; particularly for a water body with larger water depth, the traditional method for throwing the DGT probe to the bottom muddy water interface is to dive a diver to a designated position for throwing, so that the use cost of the DGT is greatly increased, the throwing depth is limited to a certain extent, and after fixation and information collection after throwing, the DGT probe is taken out and the undisturbed muddy water interface sample is extremely difficult to implement, so that the wide-range popularization of the DGT is greatly limited.

At present, the DGT device mainly comprises four types, namely a Piston type device, a Double mode device, a Flat plate type device and a liquid stationary phase device, wherein the first two devices are used for measuring soil and water, the third device is used for measuring sediment and wetland soil, the last device is mainly used for measuring the water, and for environment media with large space heterogeneity, such as the sediment, the wetland soil and the like, the Flat plate type DGT device is required to obtain the vertical or two-dimensional section information of a target object.

SUMMERY OF THE UTILITY MODEL

In view of the above, the main object of the present invention is to provide a launching and collecting device for DGT probes of sediments in different water depths.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

the utility model relates to a throwing and collecting device for DGT probes of sediments in different water depths, which comprises a DGT probe, a container, a length-adjustable operating rod and a mud door opening and closing control assembly, wherein the DGT probe is fixed in the container through an upper pin shaft, an upper cover plate is arranged at the upper end of the container, two sides of the length-adjustable operating rod penetrate through the upper cover plate and are used for throwing and recovering water depths less than five meters, a lower cover plate is arranged at the lower end of the container, and the lower cover plate is divided into a left cover plate and a right cover plate and is respectively matched with the lower end of the container through the mud door opening and closing control assembly.

In the scheme, the length-adjustable operating rod is further connected with the ground through a rope and used for throwing and recovering water in a depth of more than five meters.

In the scheme, in the throwing process, the mud door opening and closing control assemblies keep the two left and right cover plates in an opening state and are respectively connected with the corresponding mud door opening and closing control assemblies through steel wire ropes or nylon ropes.

In the above scheme, the mud door opening and closing control assembly comprises a torsion spring, a pin hole seat, a locking pin and a lower pin shaft, the left cover plate and the right cover plate are hinged to two sides of the lower end of the container through the torsion spring and the lower pin shaft respectively, a first torsion arm of the torsion spring is connected with the corresponding cover plate, a second torsion arm forms a limiting relation with the locking pin, the pin hole seat is provided with two lower side walls which are arranged outside the container respectively, the locking pin penetrates through the pin hole seat to limit the second torsion arm of the torsion spring, and the upper end of the locking pin is connected with a steel wire rope or a nylon rope.

In the above scheme, the upper side of the container is sleeved with a counterweight ring, the two side ends of the length-adjustable operating rod are respectively provided with a counterweight block, and the upper cover plate and the counterweight ring are both provided with water permeable holes.

In the scheme, the length-adjustable operating rod is formed by connecting a plurality of connecting rods through threads.

In the above scheme, be provided with the fixed orifices on the both sides lateral wall of container, wire rope or nylon rope run through upper cover plate, counter weight ring, fixed orifices after be connected with the lock pin upper end.

Compared with the prior art, the method can realize in-situ fixation for 24 hours after arrangement and arrangement of the DGT probes for the sediment of the lake and reservoir in different water depths, and can keep the original state to finish sampling under the condition that the interfaces of the sediment and water in different water depths are not disturbed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:

FIG. 1 is a perspective view of a launching and collecting device for DGT probes of sediments at different water depths, according to an embodiment of the present invention;

fig. 2 is an elevation view of a launching and collecting device for a DGT probe of sediments in different water depths according to an embodiment of the present invention.

FIG. 3 is a side sectional view of a launching and collecting device for DGT probes of sediments in different water depths, provided by an embodiment of the utility model;

fig. 4 is a flowchart of a launching and collecting device for a DGT probe of sediments in different water depths according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, the terms describing the positional relationships in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, article, or apparatus that comprises the element.

The embodiment of the utility model provides launching and collecting equipment for DGT probes of sediments in different water depths, which comprises a DGT probe 1, a container 2, a length-adjustable operating rod 3 and a mud door opening and closing control component 4, wherein the DGT probe 1 is fixed in the container 2 through an upper pin shaft 11, an upper cover plate 21 is arranged at the upper end of the container 2, two sides of the length-adjustable operating rod 3 penetrate through the upper cover plate 21, a lower cover plate 22 is arranged at the lower end of the container 2, and the lower cover plate 22 is divided into a left cover plate and a right cover plate and is respectively matched with the lower end of the container 2 through the mud door opening and closing control component 4.

The length-adjustable operating rod is formed by connecting a plurality of connecting rods through threads; for example, the first section of connecting rod is 1.5 meters, the rest connecting rods are 1 meter, and the corresponding number of connecting rods can be added on the first section of connecting rod according to the water depth.

Aiming at the water depth below five meters, the throwing in and the recovery can be finished by adopting the control lever with adjustable length.

Aiming at the water depth of more than five meters, the length-adjustable control rod 3 only adopts a first connecting rod, and then is connected with the ground through a rope for throwing and recovering.

In the throwing process, the mud door opening and closing control component 4 keeps the two left and right cover plates in an opening state, and is respectively connected with the corresponding mud door opening and closing control component 4 through a steel wire rope or a nylon rope.

The mud door opening and closing control assembly 4 comprises a torsion spring 41, a pin hole seat 42, a locking pin 43 and a lower pin shaft 44, wherein the left cover plate and the right cover plate are respectively hinged on two sides of the lower end of the container 2 through the torsion spring 41 and the lower pin shaft 44, a first torsion arm of the torsion spring 41 is connected with the corresponding cover plate, a second torsion arm and the locking pin 43 form a limiting relation, the two pin hole seats 42 are respectively arranged on the lower side wall outside the container 2, the locking pin 43 penetrates through the pin hole seat 42 to limit the second torsion arm of the torsion spring 41, and the upper end of the locking pin 43 is connected with a steel wire rope or a nylon rope.

A plurality of torsion springs 41 are uniformly arranged in the axial direction of the lower pin 44.

Because the bottom lower cover plate in the prior art rotates around the rotating shaft under the action of gravity, falls to the lower opening of the sampling tube to form a seal for the lower opening, and the process may fail to fall to a specified position due to high density of bottom mud and insufficient weight of the material of the lower cover plate in the practical application process, the torque spring 41 is arranged at the joint of the container 2 and the lower cover plate 22, and the lower cover plate 22 is closed under the restoring force action of the torque spring 41 after the limit of the torque spring 41 is released, so that the container 2 is easily sealed, and the reliability of sediment collection is increased.

The upper side of the container 2 is sleeved with a counterweight ring 23, the two side ends of the length-adjustable operating rod 3 are respectively provided with a counterweight block 12, and the upper cover plate 21 and the counterweight ring 23 are both provided with water-permeable holes 231.

The upper cover plate 21 is provided with water permeable holes 231 for allowing water to enter the container 2 and for collecting the overlying water adjacent to the sediment when the apparatus reaches the vicinity of the sediment.

Through the counterweight ring 23 and the counterweight block 12, the stress area of the mud surface after the DGT probe 1 is inserted into the sediment is increased, the whole equipment on the mud surface is more stable, the reliability of the DGT probe 1 fixed in the sediment for 24 hours and longer time is further increased, meanwhile, the counterweight block 12 ensures that the device can be inserted into the sediment, the counterweight ring 23 is of an annular structure, the surface area is large, the equipment is prevented from sinking to the position of the counterweight ring 23 by mud (sediment) and cannot continue to sink, the depth of the DGT probe 1 inserted into the sediment is prevented from being too large, and the water-sediment interface cannot be detected due to the fact that the depth of the DGT probe 1 inserted into the sediment is too large in the using process.

And fixing holes 24 are formed in the side walls of two sides of the container 2, and the steel wire rope or the nylon rope penetrates through the upper cover plate 21, the balance weight ring 23 and the fixing holes 24 and then is connected with the upper end of the locking pin 43.

The test flow of the embodiment of the utility model, as shown in fig. 4, is realized by the following steps:

step 1, fixing a DGT probe 1 in a container 2 through an upper pin shaft 11;

specifically, M8X 6 bolt fixing pins are installed at pin holes at two ends of the upper pin shaft 1, and a standard M6X 50 bolt is matched with an M6 nut to fix the DGT probe 1.

Step 2, selecting the extension length of the length-adjustable operating lever or the length of a connecting rope on the length-adjustable operating lever according to the throwing depth;

specifically, aiming at the water depth below five meters, the throwing and the recovery can be finished by adopting a length-adjustable control rod.

Step 3, after assembly, controlling the left cover plate and the right cover plate of the lower cover plate 22 to keep an open state in the throwing process through the mud door opening and closing control component 4;

specifically, when assembled, the left and right cover plates of the lower cover plate 22 are pulled apart and parallel to the side wall of the container 2, the locking pin 43 is inserted into the pin hole seat 42, and the lower end of the locking pin 43 abuts against the second torsion arm of the torsion spring 41, so that the left and right cover plates of the lower cover plate 22 are kept open during the dispensing.

Step 4, after two steel wire ropes or nylon ropes respectively pass through the upper cover plate 21, the counterweight ring 23 and the fixing hole 24, connecting and fastening the steel wire ropes or the nylon ropes with the mud door opening and closing control assembly 4, and preparing to throw in equipment after equipment is finished;

specifically, two steel wire ropes or nylon ropes are connected and fastened with the locking pin 43.

Step 5, inserting the equipment into the specified position of the sediment, wherein the equipment is fixed;

specifically, the equipment is thrown to a suitable depth according to the weight selection of the counter weight 12 and the counter weight ring 23.

And 6, after waiting for 24 hours, respectively pulling up two steel wire ropes or nylon ropes to change the state of the mud door opening and closing control assembly 4, rebounding and closing the left cover plate and the right cover plate of the lower cover plate 22, pulling the rope retrieving device to complete the recovery of the DGT probe 1, and simultaneously completing the collection of overlying water and sediments.

Specifically, after waiting for 24 hours, two steel wire ropes or nylon ropes are respectively pulled to draw the locking pins 43 out of the pin hole seats 42, the left cover plate and the right cover plate of the lower cover plate 22 are rebounded and closed under the action of the torsion spring 41, the rope retrieving equipment is pulled, the DGT probe 1 is recovered, and meanwhile, the collection of overlying water and sediments is completed.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. The device is characterized by comprising a DGT probe, a container, a length-adjustable operating rod and a mud door opening and closing control assembly, wherein the DGT probe is fixed in the container through an upper pin shaft, an upper cover plate is arranged at the upper end of the container, two sides of the length-adjustable operating rod penetrate through the upper cover plate and are used for releasing and recovering water with the depth of less than five meters, a lower cover plate is arranged at the lower end of the container and is divided into a left cover plate and a right cover plate, and the left cover plate and the right cover plate are matched with the lower end of the container through the mud door opening and closing control assembly respectively.

2. The launching and collecting device of DGT probes for sediments with different water depths as claimed in claim 1, wherein said length adjustable joystick is further connected with the ground through a rope for launching and recovering for water depths of more than five meters.

3. The launching and collecting device of the DGT probes for sediments at different water depths according to claim 1 or 2, wherein in the launching process, the mud door opening and closing control component keeps the two left and right cover plates in an open state, and is connected with the corresponding mud door opening and closing control component through a steel wire rope or a nylon rope respectively.

4. The DGT probe throwing collection equipment for sediments at different water depths according to claim 3, wherein the mud door opening and closing control assembly comprises a torsion spring, a pinhole seat, a locking pin and a lower pin shaft, the left cover plate and the right cover plate are respectively hinged on two sides of the lower end of the container through the torsion spring and the lower pin shaft, a first torsion arm of the torsion spring is connected with the corresponding cover plate, a second torsion arm of the torsion spring and the locking pin form a limiting relation, the pinhole seat is arranged in two parts and respectively arranged on the lower side wall outside the container, the locking pin penetrates through the pinhole seat to limit the second torsion arm of the torsion spring, and the upper end of the locking pin is connected with a steel wire rope or a nylon rope.

5. The launching and collecting device of DGT probes for sediments at different water depths as claimed in claim 4, wherein a counterweight ring is sleeved on the upper side of the container, counterweights are respectively arranged at the two side ends of the length-adjustable operating rod, and water-permeable holes are respectively arranged on the upper cover plate and the counterweight ring.

6. The launching and collecting device of the DGT probe for sediments with different water depths is characterized in that the length-adjustable operating rod is composed of a plurality of connecting rods which are connected through threads.

7. The launching and collecting device of the DGT probe for sediments in different water depths according to claim 6, wherein fixing holes are formed in the side walls of the two sides of the container, and the steel wire rope or the nylon rope penetrates through the upper cover plate, the counterweight ring and the fixing holes and then is connected with the upper end of the locking pin.