CN207456859U - A kind of sampler for field column shaped deposit - Google Patents

Abstract

A sampling device for columnar sediments in the field, including a mud sampling pipe, a first retaining ring is threaded at the lower end of the mud sampling pipe, a filter plate is installed in the first retaining ring, and a second retaining ring is threaded at the upper end of the mud sampling pipe. The second retaining ring has a screw connected to the internal thread of the second retaining ring, and the lower end of the screw is connected to the piston shaft arranged in the mud sampling pipe. The utility model is used to solve the problems of large sampling error and low efficiency in the existing sediment sampling method.

Description

A sampling device for columnar sediments in the field

technical field

The utility model relates to a sampling device for columnar sediments in the field.

Background technique

With the successful water storage of the Three Gorges Project, the flow velocity of the water body in the reservoir area has gradually slowed down, and the state of the water body has undergone great changes. At the same time, the ecology of the reservoir area has also been affected to a certain extent. There have been many "water blooms" in the tributaries. The outbreak of "water bloom" is mainly related to environmental factors such as nutrients (N, P), temperature, flow rate, and light. After impoundment, under the action of the main stream water body of the reservoir, some tributary bays and tributaries that have been in the submerged area of the reservoir backwater for a long time, the water flow rate becomes very slow, which is conducive to the settlement of nutrients such as N and P in the water body. Under the influence of factors such as suitable temperature, flow velocity, and light, the high-nutrient saline body under this condition may break out "algae bloom". Studies have shown that the N and P nutrients in water mainly come from point source, non-point source pollution and the release of endogenous nutrients in sediments. The release of endogenous nutrients in sediments is affected by factors such as temperature, pH, water disturbance, and river bottom flow velocity, which in turn affects the concentration of nutrients in the overlying water of rivers and lakes. For exogenous pollution such as point source and non-point source, it can be adjusted artificially, but the nutrient salt released from the endogenous source of sediment is still uncontrollable. As an important source element of aquatic ecosystems, the input of N and P content exceeds a certain threshold, which can lead to eutrophication of water bodies. The exchange of nutrients between sediments and overlying water is mainly affected by the content of nutrients in sediment interstitial water, and the transfer of soluble nutrients in interstitial water to overlying water through the mud-water interface is an important way for the release of nutrients in sediments. At present, there are many experimental studies on the transfer of nutrients such as N and P between sediments and overlying water. Studying and mastering the transfer rules of nutrient elements between sediments and overlying water plays an important role in improving water quality. For research in this area, in addition to indoor simulation experiments, it is also particularly important to take outdoor on-site sampling for water quality analysis. Therefore, this requires us to go to the field for sediment collection.

The existing sediment sampling method is as follows: fix the mud sampler on one end of the winch tied with a steel wire rope with a buckle, and vertically lower the mud picker to the bottom of the river by controlling the winch. After reaching the river bottom, adjust the rise of the winch Control the device, lift the mud sampler slowly, then manually remove the mud sampler, and then sample the sediment. When sampling the sediment, it is necessary to remove the columnar mud sampling tube from the mud sampling device, place the manual mud sampling tube vertically, and slowly push the sediment out according to the scale line of the glass tube with a tamping rod, so as to carry out sedimentation Sampling of things. However, sampling in this way will lead to cumbersome sampling work when collecting sediment, wasting time and manpower, resulting in large errors in sampling, and the efficiency of sediment collection is also greatly reduced, and it takes more time.

Contents of the invention

The technical problem solved by the utility model is to provide a sampling device for columnar sediments in the field, which is used to solve the problems of large sampling errors and low efficiency in the existing sediment sampling methods.

In order to solve the problems of the technologies described above, the technical solution of the utility model is:

A sampling device for columnar sediments in the field, including a mud sampling pipe, a first retaining ring is threaded at the lower end of the mud sampling pipe, a filter plate is installed in the first retaining ring, and a second retaining ring is threaded at the upper end of the mud sampling pipe. The second retaining ring is threadedly connected with a screw rod in the second retaining ring, and the lower end of the screw rod is connected with the piston shaft arranged in the dredging pipe.

It also includes a bracket, the bracket includes a base plate and a positioning ring, the base plate and the positioning ring are connected by a plurality of pillars, the dredging pipe is arranged in the positioning ring, and the positioning ring is installed with a The top wire for fixing the pipe is provided with a plurality of through holes on the bottom plate.

A shaft sleeve is fixed on the upper end surface of the piston, and the lower end of the screw rod is inserted into the shaft sleeve.

A cut groove parallel to the axis of the screw rod is opened on the surface of the screw rod, and a scale line is arranged in the cut groove.

A handle is installed on the upper end of the screw rod.

The beneficial effect of the utility model is: push the piston down through the screw rod, first squeeze out the water in the sediment, then remove the first retaining ring, continue to push the piston down, and the sediment has been slowly pushed out of the mud collecting pipe and then sliced. This can bring convenience to field monitoring personnel, save time, improve efficiency, and reduce sampling errors.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is a schematic cross-sectional structure diagram of the utility model.

In the figure: mud pipe 1, first retaining ring 2, second retaining ring 3, filter plate 4, screw rod 5, piston 6, bracket 7, handle 8, slot 51, shaft sleeve 61, bottom plate 71, positioning ring 72 , Top wire 73, pillar 74, through hole 75.

Detailed ways

As shown in Figure 1, a sampling device for columnar sediments in the field includes a mud sampling pipe 1, a first retaining ring 2 is threaded at the lower end of the mud sampling pipe 1, and a filter plate is installed in the first retaining ring 2 4. A second retaining ring 3 is threadedly connected to the upper end of the dredging pipe 1, and a screw 5 is connected to the internal thread of the second retaining ring 3, and the lower end of the screw rod 5 is pivotally connected to the piston 6 arranged in the mud collecting pipe 1.

Also includes a support 7, the support 7 includes a base plate 71 and a positioning ring 72, connected by a plurality of pillars 74 between the base plate 71 and the positioning ring 72, the dredging pipe 1 is arranged in the positioning ring 72, in A top wire 73 for fixing the dredging pipe 1 is installed on the positioning ring 72 , and a plurality of through holes 75 are opened on the bottom plate 71 . When in use, screws or expansion screws can be fixed in the through holes 75 to fix the bottom plate 71 to the desktop or the ground, so that when the screw 5 is rotated, the mud pipe 1 cannot rotate with the screw 5, so that the experimenter operate.

A shaft sleeve 61 is fixed on the upper end surface of the piston 6 , and the lower end of the screw rod 5 is inserted into the shaft sleeve 61 .

A slot 51 parallel to the axis of the screw 5 is provided on the surface of the screw 5 , and a scale line is provided in the slot 51 . Graduation marks allow easy measurement of the amount of sediment squeezed out.

A handle 8 is installed at the upper end of the screw rod 5 . The handle 8 can rotate the screw rod 5 conveniently.

The using method of the utility model is:

In the first step, after the dredging pipe 1 is taken out from the dredging device, the screw 5 is rotated slightly to apply pressure to the sediment in the dredged pipe 1 to squeeze out most of the water in the sediment, and then stand for a period of time. Time, let a small amount of moisture in the sediment drip out, and finally rotate the screw 5 again to apply pressure to the sediment.

The second step is to remove the first retaining ring 2, slowly rotate the screw rod 5, and at the same time observe the scale line on the screw rod 5, and discharge the sediment quantitatively from the dredging pipe 1.

The third step is to place the petri dish on the bottom plate 71 of the dredging pipe 1, and then use a steel wire to stick to the nozzle of the dredged pipe 1 to slice the sediment discharged from the dredged pipe 1, and the sliced sediment is dropped on the Petri dish.

The fourth step is to continue to slice the sediment in the mud sampling pipe 1 according to the above second and third steps until all the sediments in the mud sampling pipe 1 are sliced, and then number each petri dish in sequence and send it to the lower level for detection department.

Claims (5)

1. a kind of sampler for field column shaped deposit, it is characterised in that：Including adopting mud pipe（1）, adopting mud pipe（1）Under End is threaded with the first baffle ring（2）, in the first baffle ring（2）Filter plate is inside installed（4）, adopting mud pipe（1）Threaded upper ends chain It is connected to the second baffle ring（3）, in the second baffle ring（3）Internal thread chain is connected to screw rod（5）, screw rod（5）Mud pipe is adopted with being arranged in lower end（1） Interior piston（6）Axis connects.

2. a kind of sampler for field column shaped deposit according to claim 1, it is characterised in that：Further include branch Frame（7）, the stent（7）Including bottom plate（71）And locating ring（72）, the bottom plate（71）And locating ring（72）Between by more Root pillar（74）Connection, it is described to adopt mud pipe（1）It is arranged on the locating ring（72）It is interior, in locating ring（72）On be equipped be used for will Adopt mud pipe（1）Fixed jackscrew（73）, in bottom plate（71）On offer multiple through holes（75）.

3. a kind of sampler for field column shaped deposit according to claim 1, it is characterised in that：In piston （6）Axle sleeve is fixed on upper surface（61）, screw rod（5）Lower end is inserted in the axle sleeve（61）It is interior.

4. a kind of sampler for field column shaped deposit according to claim 1, it is characterised in that：In screw rod （5）Surface offers one and screw rod（5）The parallel grooving of axis（51）, in grooving（51）It is interior to be equipped with graduation mark.

5. a kind of sampler for field column shaped deposit according to claim 1, it is characterised in that：In screw rod （5）Upper end is equipped with handle（8）.