Sewage sampling device for environmental monitoring

Abstract

The utility model belongs to the technical field of sewage sampling, and particularly relates to an environment monitoring sewage sampling device which comprises a sewage sampling pipe, a water inlet and outlet part is arranged on the lower portion of the sewage sampling pipe, a piston is slidably and hermetically connected in the sewage sampling pipe, and a driving part for controlling the piston to move is arranged at the upper end of the piston. A shell for sealing the sewage sampling pipe, the piston and the driving part is arranged outside the sewage sampling pipe, the upper portion of the shell is a receding column of the piston, the cross section area of the upper portion of the shell is smaller than that of the lower portion of the shell, a water filtering frame is arranged on the upper portion of the shell, and a top plate is fixedly connected between the top of the shell and the water filtering frame. A containing cavity capable of expanding or shrinking space according to the volume of inflated gas is formed between the water filtering frame and the receding column, the upper portion of the containing cavity is communicated with an inflation hose, the inflation hose is communicated with an air pump, and the upper portion of the shell is connected with a lifting rope. The sewage sampling device is simple in structure, and the depth of the sampling device can be changed by changing the descending length of the lifting rope, so that sewage at different depths can be sampled.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage sampling, and in particular relates to a sewage sampling device for environmental monitoring. Background Art

[0002] Water environment monitoring is the process of conducting qualitative, quantitative and systematic comprehensive analysis of pollutants and their related components using physical, chemical and biological techniques to explore and study the changing patterns of water environment quality. In order for monitoring data to accurately reflect the current quality of the water environment and predict the development trend of water environment pollution, water environment monitoring data must be representative, accurate, precise, parallel, repeatable, complete and comparable. When testing the water environment, it is necessary to sample sewage.

[0003] The existing sewage sampler usually puts the sampler into water and lowers the rope to different depths by a hanging rope to sample sewage at different depths. For example, the Chinese patent with patent number CN217717047U discloses a sewage sampling device for environmental monitoring, comprising a cage frame and a bottle body, the cage frame comprising a frame body, a sealing cover assembly and a counterweight assembly, the frame body comprising a top plate, an annular clamping sleeve and a bottom plate all horizontally arranged from top to bottom, a plurality of parallel connecting columns fixedly connected between the top plate and the bottom plate, the sealing cover assembly comprising a sliding rod vertically slidably connected to the middle of the top plate, a cover body fixed to the bottom of the sliding rod and a first coil spring sleeved on the outer circumference of the sliding rod, the counterweight assembly is connected to one end of the connecting column near the bottom plate, the middle of the annular clamping sleeve is provided with an avoidance hole adapted to the diameter of the bottle body, the annular clamping sleeve is slidably connected to the connecting column, and the connecting column is sleeved with a second coil spring between the top plate and the annular clamping sleeve;

[0004] However, in the prior art, the sampler needs to be lifted manually after sampling is completed. After the sampling device completes sampling, in addition to its own gravity, the weight of the water attached to it is also too heavy, and the staff needs to use a lot of force to lift the sampling device. Utility Model Content

[0005] In view of the problems raised by the above background technology, the purpose of the present utility model is to provide an environmental monitoring sewage sampling device to solve the problems raised by the above background technology.

[0006] In order to achieve the above technical objectives, the technical solutions adopted by this utility model are as follows:

[0007] A sewage sampling device for environmental monitoring includes a sewage sampling tube, a water inlet and outlet portion is provided at the lower portion of the sewage sampling tube, a piston is slidingly and sealedly connected inside the sewage sampling tube, a driving member for controlling the movement of the piston is provided at the upper end of the piston, a shell is provided on the outside of the sewage sampling tube for sealing the sewage sampling tube, the piston and the driving member, the upper portion of the shell is a yield column for the piston, the upper cross-sectional area is smaller than the lower portion, a water filter frame is provided at the upper portion of the shell, a top plate is fixedly connected between the top of the shell and the water filter frame, a accommodating cavity is provided between the water filter frame and the yield column, the space of which can expand or shrink according to the volume of the gas filled, the upper portion of the accommodating cavity is connected to an inflation hose, the inflation hose is connected to an air pump, and the upper portion of the shell is connected to a hanging rope.

[0008] Preferably, there are one or more sewage sampling pipes.

[0009] Preferably, the driving member is an electric telescopic rod, the electric telescopic rod is fixedly assembled and connected to the side wall of the sewage sampling pipe, and the output end of the electric telescopic rod is transmission-connected.

[0010] Preferably, a filter portion is provided at the inlet of the water inlet and outlet.

[0011] Preferably, the filter portion is detachably connected to the water inlet and outlet portions.

[0012] Preferably, the filter portion includes a filter screen and a connecting ring, and the filter screen is located between the end of the water inlet and outlet and the connecting ring.

[0013] Preferably, there are two accommodating cavities, which are symmetrically arranged on both sides of the sewage sampling pipe.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The utility model has a simple structure. By changing the lowering length of the suspension rope, the depth of the sampling device can be changed, thereby sampling sewage at different depths.

[0016] 2. The utility model can reduce the workload of the staff. After the sewage sampling tube is controlled to complete the sewage sampling, the accommodating cavity is inflated, thereby reducing the overall density of the sampling device, so that the sampling device rises under the buoyancy of the water, reducing the force required for the staff to pull the sampling device up.

[0017] 3. The utility model can control the collection and discharge of sewage in a single sewage sampling tube. The setting of multiple sampling tubes can sample sewage in different waters and at different depths. There is no need to sample sewage in other areas after discharging the sewage in the sewage sampling tube. The sewage in multiple sewage sampling tubes can be discharged after sampling is completed.

[0018] 4. The utility model can effectively perform preliminary filtration on sewage and remove large impurities in sewage by connecting the filter part to the water inlet and outlet, while avoiding blockage of the water inlet and outlet. The filter part can be disassembled for easy replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention can be further described by way of non-limiting examples given in the accompanying drawings;

[0020] Figure 1 This is a structural diagram of an embodiment of an environmental monitoring sewage sampling device of the present utility model;

[0021] Figure 2 This is a cross-sectional view of the middle part of the housing of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the sewage sampling pipe assembly of the utility model;

[0023] Figure 4 for Figure 2 A partial enlarged view of point A in the middle

[0024] The main component symbols are described as follows:

[0025] Sewage sampling tube 1, water inlet and outlet part 11, piston 12, electric telescopic rod 13, shell 2, water filter frame 21, top plate 22, accommodating cavity 3, inflation hose 31, hanging rope 4, filter part 5, filter screen 51, connecting ring 52. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0027] like Figure 1-3 As shown, a sewage sampling device for environmental monitoring includes a sewage sampling tube 1, a water inlet and outlet 11 is provided at the lower part of the sewage sampling tube 1, a piston 12 is slidingly and sealedly connected inside the sewage sampling tube 1, and a driving member for controlling the movement of the piston is provided at the upper end of the piston 12. A shell 2 for sealing the sewage sampling tube 1, the piston 12 and the driving member is provided on the outside of the sewage sampling tube 1, the upper part of the shell 2 is a yield column for the piston 12, and the upper cross-sectional area is smaller than the lower part, a water filter frame 21 is provided at the upper part of the shell 2, a top plate 22 is fixedly connected between the top of the shell 2 and the water filter frame 21, and a accommodating cavity 3 is provided between the water filter frame 21 and the yield column, which can expand or shrink the space according to the volume of the gas filled, the upper part of the accommodating cavity 3 is connected with an inflation hose 31, the inflation hose 31 is connected with an air pump, and the upper part of the shell 2 is connected with a hanging rope 4.

[0028] According to the technical solution of this embodiment, the sewage sampling tube 1 is used to hold the sewage after sampling, and the water inlet and outlet part 11 is used to sample and discharge the sewage in the sewage sampling tube 1. The piston 12 is used to control the water volume in the sewage sampling tube 1. When the piston 12 moves upward, a negative pressure is formed in the sewage sampling tube 1, and the sewage is sucked into the sewage sampling tube 1; when the piston 12 moves downward, the piston 12 discharges the sampled sewage from the sewage sampling tube 1. The driving member is used to control the movement of the piston relative to the sewage sampling tube 1, so that there is no need to manually move the piston. The shell is used to seal the sewage sampling tube 1, the piston 12 and the driving member, and the driving member is controlled by a program. The work of the invention prevents the movement of the piston 12 from being affected by the underwater environment. The water filter frame 21 is connected to the outside world, and the accommodating cavity 3 is located in the water filter frame 21. When the air pump inflates the accommodating cavity 3, the volume of the accommodating cavity increases, and the water in the water filter frame 21 is discharged. At the same time, the overall density of the sampling device is reduced, so that the seal of the sampling device is less than the density of water, so that the sampling device floats on the water surface. The top plate 22 seals the upper part of the shell 2 and is connected to the water filter frame 21 at the same time. When the water in the accommodating cavity 3 is discharged through the inflation hose, the volume of the accommodating cavity 3 is reduced, thereby reducing the density of the sampling device body. The sampling device is lowered to different depths according to the length of the lifting rope.

[0029] The number of the sewage sampling pipes 1 is one or more.

[0030] In this embodiment, when there are multiple sewage sampling tubes 1, the number of the water inlet and outlet parts 11, the piston 12, the driving part and the sewage sampling tube 1 are the same, that is, multiple. When the sampling device samples at different depths or different areas, the operation of the sewage sampling tube 1 is individually controlled. When sampling sewage, the operation between the various sewage sampling tubes 1 is not affected. The sewage in the sewage sampling tube 1 can be taken out after sampling of multiple areas is completed. There is no need to discharge the sewage in the sewage sampling tube 1 multiple times before sampling. At the same time, it can reduce the number of times the sampling device is moved out of the water area, thereby reducing the workload.

[0031] Reference Figure 3 : The driving member is an electric telescopic rod 13, which is fixedly assembled and connected to the side wall of the sewage sampling pipe 1, and the output end of the electric telescopic rod 13 is transmission connected.

[0032] In this embodiment, the operation of the electric telescopic rod 13 is controlled by a program. When the working part of the electric telescopic rod 13 is extended, the sewage reaches the sewage sampling tube 1 through the water inlet and outlet part 11. When the working part of the electric telescopic rod 13 is retracted, the sewage in the sewage sampling tube 1 is discharged.

[0033] Reference Figure 2 : A filter portion 5 is provided at the inlet of the water inlet and outlet portion 11.

[0034] In this embodiment, the filter portion 5 is used to exclude large impurities in the water from the filter portion 5 , making it easier for workers to test the sewage while preventing the impurities from clogging the water inlet and outlet 11 .

[0035] Reference Figure 2 : The filter part 5 is detachably connected to the water inlet and outlet parts 11.

[0036] In this embodiment, the filter portion 5 is detachably connected to the water inlet and outlet portion 11, so that the filter portion 5 can be easily removed for cleaning or replacement.

[0037] Reference Figure 2 and 4 The filter portion 5 includes a filter screen 51 and a connecting ring 52 , and the filter screen 51 is located between the end of the water inlet and outlet portion 11 and the connecting ring 52 .

[0038] In this embodiment, the filter screen 5 is used to filter large impurities, the connecting ring 52 is used to connect the water inlet and outlet 11, and the filter screen 5 can be removed, replaced and cleaned.

[0039] Reference Figure 2 : There are two accommodating cavities 3, which are symmetrically arranged on both sides of the sewage sampling pipe 1.

[0040] In this embodiment, there are two accommodating cavities 3 to facilitate keeping the sampling device balanced.

[0041] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. In addition, the present invention is mainly used to protect mechanical devices, so the control method and circuit connection are no longer explained in detail in the present invention.

[0042] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by persons skilled in the art without departing from the spirit and technical principles disclosed herein shall be covered by the claims of the present invention.

Claims

1. A sewage sampling device for environmental monitoring, comprising a sewage sampling tube (1), characterized in that: The lower part of the sewage sampling tube (1) is provided with a water inlet and outlet part (11), a piston (12) is slidably sealed in the sewage sampling tube (1), and a driving member for controlling the movement of the piston is provided at the upper end of the piston (12). The outside of the sewage sampling tube (1) is provided with a shell (2) for sealing the sewage sampling tube (1), the piston (12) and the driving member. The upper part of the shell (2) is a relief column for the piston (12), and the cross-sectional area of the upper part is smaller than that of the lower part. The upper part of the shell (2) is provided with a water filter frame (21), and a top plate (22) is fixedly connected between the top of the shell (2) and the water filter frame (21). A accommodating cavity (3) capable of expanding or contracting space according to the volume of gas filled is provided between the water filter frame (21) and the relief column. The upper part of the accommodating cavity (3) is connected with an inflation hose (31), and the inflation hose (31) is connected with an air pump. The upper part of the shell (2) is connected with a hanging rope (4).

2. The environmental monitoring sewage sampling device according to claim 1, characterized in that: The number of the sewage sampling pipes (1) is one or more.

3. The environmental monitoring sewage sampling device according to claim 2, characterized in that: The driving member is an electric telescopic rod (13), the electric telescopic rod (13) is fixedly assembled and connected to the side wall of the sewage sampling pipe (1), and the output end of the electric telescopic rod (13) is transmission-connected.

4. The environmental monitoring sewage sampling device according to claim 3, characterized in that: A filter portion (5) is provided at the inlet of the water inlet and outlet portion (11).

5. The environmental monitoring sewage sampling device according to claim 4, characterized in that: The filter portion (5) is detachably connected to the water inlet and outlet portion (11).

6. The environmental monitoring sewage sampling device according to claim 4, characterized in that: The filter portion (5) comprises a filter screen (51) and a connecting ring (52), and the filter screen (51) is located between the end of the water inlet and outlet portion (11) and the connecting ring (52).

7. The environmental monitoring sewage sampling device according to claim 4, characterized in that: There are two accommodating cavities (3), which are symmetrically arranged on both sides of the sewage sampling pipe (1).

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