CN214503018U

CN214503018U - Handheld shallow water sampling device

Info

Publication number: CN214503018U
Application number: CN202023303426.4U
Authority: CN
Inventors: 李如忠; 陆兆; 吴小龙
Original assignee: Hefei University of Technology
Current assignee: Hefei University of Technology
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-10-26
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a hand-held shallow water sampling device, and belongs to the technical field of water environment monitoring and treatment; comprises a support rod, a grab handle unit, a negative pressure unit and a sampling unit. The grab handle unit, the negative pressure unit and the sampling unit are respectively fixed on the support rod, the front end of the grab handle unit is connected with the negative pressure unit, and the air inlet end of the negative pressure unit is connected to the sampling unit through an exhaust tube; the negative pressure unit comprises an outer cylinder, a limiter, a piston connecting rod, a piston return spring, a one-way valve and an exhaust tube; the outer cylinder body is fixed in the middle of the supporting rod, the upper end face of the outer cylinder body is provided with a limiter, the lower end face of the outer cylinder body is provided with an air inlet, a one-way air inlet valve is arranged in the air inlet, the side face of the lower end of the outer cylinder body is provided with an air outlet, and a one-way exhaust valve is arranged in the air outlet.

Description

Handheld shallow water sampling device

Technical Field

The utility model relates to a water environment monitoring and improvement technical field particularly are a hand-held type shallow water sampling device.

Background

The water quality monitoring refers to the process of monitoring and measuring the types, concentrations and change trends of pollutants in water at regular or irregular time and further evaluating the water quality condition. The water quality monitoring has an extremely important role in maintaining the water environment health. Generally, the monitoring range mainly includes polluted and uncontaminated rivers, lakes, seas, groundwater and the like, and the natural water flow of the brook is relatively less concerned. The stream length is reported to account for about 70% -80% of the total length of the river in the river basin, water and nutrients of about 60% of a water system are stored, nitrogen and phosphorus nutrients carried by the stream are transmitted step by step, and finally the stream can be converged into a water system (river, reservoir, lake and the like) with higher grade, so that the quality of the water environment is influenced. Therefore, in order to more comprehensively grasp the current situation and the development trend of the water environment quality of the drainage basin, it is necessary to enhance the monitoring of hydrological units such as stream ditches and the like in the drainage basin range.

Although the current water sample collecting device has various forms, the device is mainly suitable for collecting deep water samples such as rivers, lakes and the like. As the stream generally has the characteristics of shallow water depth, narrow water surface width and the like, the water sampling bottle is mainly used for sampling water samples, and the depth of the collected water samples is difficult to control in the sampling process.

Therefore, the design of a device which is simple to operate and convenient to carry and can randomly collect shallow stream samples is still a key problem to be solved urgently in the field.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model aims at providing a hand-held type shallow water sampling device to the problem that the sampling is inconvenient among the solution prior art and shallow water deposit is easily disturbed.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a hand-held type shallow layer water sampling device, includes bracing piece, grab handle unit, negative pressure unit and sampling unit, on grab handle unit, negative pressure unit and sampling unit were fixed in the bracing piece respectively, grab handle unit connection negative pressure unit, the air inlet end of negative pressure unit was connected to sampling unit through the hose on.

The grab handle unit is composed of a handle, a trigger and a connecting rod, the base is fixed at the tail end of the supporting rod, the handle is fixed on the base, the trigger is hinged with the base, and the connecting rod is hinged with the piston connecting rod of the trigger and the negative pressure unit respectively.

The negative pressure unit comprises an outer cylinder, a limiter, a piston connecting rod, a piston return spring, a one-way valve and an exhaust tube; the outer cylinder body is fixed in the middle of the supporting rod, the upper end face of the outer cylinder body is provided with a limiter, the lower end face of the outer cylinder body is provided with an air inlet, a one-way air inlet valve is arranged in the air inlet, the side face of the lower end of the outer cylinder body is provided with an air outlet, and a one-way exhaust valve is arranged in the air outlet; the piston is arranged in the outer cylinder body, a piston connecting rod is connected to the piston, a piston return spring is sleeved outside the piston connecting rod, and two ends of the spring respectively abut against the upper end face of the outer cylinder body and the piston; one end of the exhaust tube is connected with the air inlet, and the other end of the exhaust tube is connected with the sampling unit.

The exhaust tube is a rubber hose.

The sampling unit comprises a sampling bottle, a stabilizing frame, a water pumping pipe, a sampling head and a floating disc; the steady rest is fixed in the bracing piece front portion, and on the sampling bottle was fixed in the steady rest, the sampling bottle upper end was equipped with two intubate for utensil handhole door (stopper), was equipped with two intubate on the utensil handhole door (stopper), and negative pressure unit is connected through the exhaust tube to an intubate, and another intubate is connected to the sample head through the delivery pipe, and the sample head is fixed in the middle part of the floating plate.

The sampling head lower extreme water inlet is equipped with great bore screen cloth, and has designed the sampling head of three kinds of length sizes of 2cm, 5cm and 10cm in order to accord with different sample demands.

The floating disc is a hollow plastic disc, a hole is formed in the center of the disc, the hole wall is a soft rubber ring, and the floating disc is suspended at the top end of the supporting rod through two thin wires.

The stabilizing frame comprises a supporting frame with a bottom support and elastic clamping pieces, the back of the supporting frame is provided with screw holes which can be fixed on the supporting rod through connecting pieces, and the elastic clamping pieces are positioned on two sides of the supporting frame.

Compared with the prior art, the beneficial effects of the utility model are that: the floating disc of the utility model can float on the water surface and can keep the water inlet immersed below the water surface, thereby collecting a target water sample on the premise of not disturbing the stream bottom mud; the sampling bottle is clamped by the stabilizing frame and is fixed on the supporting rod, the structure is stable, and the sampling bottles with different volumes can be replaced by adjusting the elastic clamping piece so as to meet the actual needs of samplers; and the whole device has simple structure and reasonable design, can be operated by a single person and is not easy to be limited by field conditions. In addition, the device is also suitable for collecting surface layer water samples of deep water rivers, lakes and the like.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a handle unit of the present invention;

FIG. 3 is a view of the negative pressure unit structure of the present invention;

FIG. 4 is a schematic view of the check valve of the present invention;

FIG. 5 is a schematic view of a sampling bottle mouth according to an embodiment of the present invention;

FIG. 6 is a schematic view of a sampling bottle according to another embodiment of the present invention;

FIG. 7 is a schematic view of the stabilizer of the present invention;

fig. 8 is a schematic view of the floating disc and the sampling head structure of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to the drawings, in the embodiment of the present invention, a handheld shallow water sampling device includes a support rod 1, a handle unit 2, a negative pressure unit 3 and a sampling unit 4, where the support rod 1 plays a role of connecting the handle unit 2, the negative pressure unit 3 and the sampling unit 4, and has a certain rigidity to support the weight of other components.

The grab handle unit 2 is composed of a base 2-1, a handle 2-2, a trigger 2-3 and a connecting rod 2-4, the base 2-1 is fixed at the tail end of the supporting rod 1, the handle 2-2 is fixed on the base 2-1, the trigger 2-3 is hinged with the base, the connecting rod 2-4 is hinged with a piston connecting rod 3-4 of the negative pressure unit 3 respectively through the trigger 2-3, and the connecting rod 2-4 can be driven to move upwards by pulling the trigger 2-3, so that the piston 3-3 of the negative pressure unit 3 is driven to move upwards.

The negative pressure unit 3 consists of an outer cylinder 3-1, a limiter 3-2, a piston 3-3, a piston connecting rod 3-4, a piston return spring 3-5, a one-way air inlet valve 3-6, a one-way exhaust valve 3-7 and an exhaust tube 3-8; the outer cylinder 3-1 is fixed in the middle of the support rod 1, the middle of the upper end surface of the outer cylinder is provided with a limiter 3-2, the limiter 3-2 is cylindrical, the inner diameter of the limiter is the same as the diameter of the piston connecting rod 3-4 so as to ensure the motion track of the piston connecting rod 3-4 to be stable, the middle of the lower end surface of the outer cylinder 3-1 is provided with an air inlet, a one-way air inlet valve 3-6 is arranged in the air inlet, the lower end surface of the outer cylinder 3-1 is provided with an air outlet corresponding to the air inlet, a one-way exhaust valve 3-7 is also arranged in the air outlet, the two one-way valves have the same structure and operation principle and consist of a shell 3-6(7) -1, a floating plug 3-6(7) -2 and a floating plug return spring 3-6(7) -3, when the piston 3-3 moves upwards, when the air pressure at the lower end of the one-way air inlet valve 3-6 is larger than the elastic force of the floating plug return spring 3-6-3, the floating plug 3-6-2 is jacked up, air is pumped into the negative pressure unit 3 from the sampling bottle 4-1 through the air pumping pipe 4-8, meanwhile, the floating plug 3-7-2 of the one-way exhaust valve 3-7 is propped against the lower part of the shell 3-7-1 under the action of atmospheric pressure and the elastic force of the floating plug return spring 3-7-3, so that external air is prevented from entering the negative pressure unit 3, then the piston 3-3 moves downwards, the one-way intake valve 3-6 is closed, the one-way exhaust valve 3-7 is opened, and the air is exhausted out of the negative pressure unit 3 from the exhaust port to reciprocate; the diameter of the piston 3-3 is the same as the inner diameter of the outer cylinder 3-1, the piston is made of rubber to ensure air tightness, the upper end of the piston 3-3 is connected with a piston connecting rod 3-4, a piston return spring 3-5 is sleeved outside the piston connecting rod 3-4, two ends of the spring respectively abut against the upper end surface of the outer cylinder 3-1 and the upper end of the piston 3-3, and the pulled piston 3-3 can be returned to the bottom of the outer cylinder 3-1; the air exhaust pipes 3 to 8 are rubber hoses, one end of each air exhaust pipe is connected with the air inlet, and the other end of each air exhaust pipe is connected with a hole cover (plug) of the sampling unit 4.

The sampling unit 4 consists of a sampling bottle, a hole cover (plug), a stabilizing frame, a water pumping pipe, a sampling head and a floating disc; the stabilizing frame is fixed at the front part of the supporting rod 1 and mainly comprises a supporting frame 4-3-1 with a bottom support and an elastic clamping piece 4-3-2, the back of the supporting frame 4-3-1 is provided with a screw hole which can be fixed on the supporting rod 1 through a connecting piece 4-3-3, and the elastic clamping piece 4-3-2 is positioned at two sides of the supporting frame 4-3-1 to play a role in clamping a sampling bottle; the sampling bottle is divided into a screw cap type and a plug type, the corresponding screw cap and the corresponding rubber plug are used for sealing, and a hole cover or a hole plug is selected to be matched with sampling according to needs during sampling; the hole cover (plug) is provided with double hole positions, hard glass insertion tubes are inserted into the holes to conveniently sleeve the extraction tube and the sampling tube, and the glass tube and the hole of the hole cover (plug) are sealed by pouring glue to ensure the air tightness; the floating disc is a hollow plastic disc, the center of the disc is provided with a hole, the hole wall is a soft rubber ring, and the floating disc is suspended at the lower end of the support rod 1 by two thin wires; the water pumping pipe is a rubber hose, one end of the water pumping pipe is connected with a hole cover (plug), and the other end of the water pumping pipe is connected with a sampling head; the sampling head is designed with three length sizes of 2cm, 5cm and 10cm, the diameter of the middle part is slightly larger than that of the central rubber ring of the floating disc so as to ensure that the rubber ring has enough friction force to fix the sampling head, the upper position and the lower position of the sampling head relative to the floating disc can be finely adjusted manually so as to meet the requirements of different samplers, the diameter of the upper part of the sampling head is thinner so as to conveniently sleeve a water taking pipe, and a water inlet at the lower end of the sampling head is provided with a large-caliber screen mesh so as to prevent certain large-volume floating solids in water from entering the water pumping pipe to cause blockage.

The utility model discloses a use: after the sampling point is reached, a sampling bottle is installed and fixed on the supporting rod, a handle 2-1 of the sampling device is held tightly, the sampling device is slowly put down, the floating disc is in contact with the water surface, the trigger 2-2 is pulled, so that the connecting rod 2-4 is pulled backwards, the piston 3-3 in the negative pressure unit 3 is further driven to move in the same direction, at the moment, gas in the sampling bottle is pumped into the negative pressure unit 3 through the exhaust pipe 3-8 and is exhausted out of the device through the one-way exhaust valve 3-7, finally, under the action of atmospheric pressure, water flow enters the sampling bottle through the sampling head and the exhaust pipe, a sufficient water sample is collected in the sampling bottle 4-1, the sampling device is folded, and the sampling process is completed.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, 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, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hand-held type shallow water sampling device, includes bracing piece, grab handle unit, negative pressure unit and sampling unit, its characterized in that: the grab handle unit, the negative pressure unit and the sampling unit are respectively fixed on the support rod, the front end of the grab handle unit is connected with the negative pressure unit, and the air inlet end of the negative pressure unit is connected to the sampling unit through an exhaust tube; the negative pressure unit comprises an outer cylinder, a limiter, a piston connecting rod, a piston return spring, a one-way valve and an exhaust tube; the outer cylinder body is fixed in the middle of the supporting rod, the upper end face of the outer cylinder body is provided with a limiter, the lower end face of the outer cylinder body is provided with an air inlet, a one-way air inlet valve is arranged in the air inlet, the side face of the lower end of the outer cylinder body is provided with an air outlet, and a one-way exhaust valve is arranged in the air outlet; the piston is arranged in the outer cylinder body, a piston connecting rod is connected to the piston, a piston return spring is sleeved outside the piston connecting rod, and two ends of the spring respectively abut against the upper end face of the outer cylinder body and the piston; one end of the air exhaust pipe is connected with the air inlet, and the other end of the air exhaust pipe is connected with the sampling unit; the sampling unit comprises a sampling bottle, a stabilizing frame, a water pumping pipe, a sampling head and a floating disc; the steady rest is fixed in the bracing piece front portion, and on the sampling bottle was fixed in the steady rest, the sampling bottle upper end was equipped with two intubate for the handhole door, was equipped with two intubate on the handhole door, and an intubate passes through exhaust tube and connects the negative pressure unit, and another intubate passes through the water intaking pipe and is connected to the sample head, and the sample head is fixed in the middle part of the floating plate.

2. The handheld shallow water sampling device of claim 1, wherein: the grab handle unit is composed of a handle, a trigger and a connecting rod, the base is fixed at the tail end of the supporting rod, the handle is fixed on the base, the trigger is hinged with the base, and the connecting rod is hinged with the piston connecting rod of the trigger and the negative pressure unit respectively.

3. The handheld shallow water sampling device of claim 2, wherein: the exhaust tube is a rubber hose.

4. The handheld shallow water sampling device of claim 1, wherein: and a larger-caliber screen is arranged at a water inlet at the lower end of the sampling head.

5. The handheld shallow water sampling device of claim 1, wherein: the floating disc is a hollow plastic disc, a hole is formed in the center of the disc, the hole wall is a soft rubber ring, and the floating disc is suspended at the top end of the supporting rod through two thin wires.

6. The handheld shallow water sampling device of claim 1, wherein: the stabilizing frame comprises a supporting frame with a bottom support and elastic clamping pieces, the back of the supporting frame is provided with screw holes which can be fixed on the supporting rod through connecting pieces, and the elastic clamping pieces are positioned on two sides of the supporting frame.