Sample extraction equipment for detecting trichloroethylene in underground water

Abstract

The sample extraction equipment comprises a water suction pump and a protective shell, the protective shell is of a cylindrical structure and is provided with an upward opening, a plurality of through holes are formed in the circumferential outer wall of the protective shell at equal intervals, and a load bearing block is fixedly connected to the outer wall of the lower end of the protective shell; the inner wall of the lower end of the protective shell is vertically and fixedly connected with a first filter screen and a second filter screen, the first filter screen is located in the second filter screen, the upper end of the protective shell is covered with a top cover, and the lower end of the top cover is concentrically and fixedly connected with a clamping cover, a first clamping ring and a second clamping ring; the protective shell provided with the first filter screen and the second filter screen is arranged at the end of the first water pipe, foreign matter is prevented from entering the water suction pump to cause blockage, the protective shell can protect the first filter screen and the second filter screen during filtering, and damage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sample collection equipment, in particular to a sample extraction device for detecting trichloroethylene in groundwater. Background Technique

[0002] Due to the large use and unreasonable disposal of chlorinated organic solvents, trichloroethylene has become a common organic pollutant in groundwater. When detecting groundwater, groundwater samples are usually collected first, and then the groundwater samples are analyzed to detect the content and pollution degree of trichloroethylene in the groundwater.

[0003] At present, when collecting groundwater samples, groundwater is generally extracted by pumping equipment. When pumping water, the pipeline is usually inserted into the groundwater, and most of the water inlet of the pipeline is not provided with a protection structure. During the pumping process, foreign matters in the groundwater will enter the inside of the pumping equipment, causing blockage and inconvenient cleaning in the later stage. Content of the Utility Model

[0004] The purpose of the utility model is to provide a sample extraction device for detecting trichloroethylene in groundwater, so as to solve the technical problem of difficult cleaning of foreign matter blockage in the existing sampling equipment.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A sample extraction device for detecting trichloroethylene in groundwater includes a water pump and a protective shell. The protective shell is in a cylindrical structure with an upward opening. A number of through holes are equidistantly arranged on the circumferential outer wall of the protective shell. A weight block is fixedly connected to the lower outer wall of the protective shell. A first filter screen and a second filter screen are vertically and fixedly connected to the lower inner wall of the protective shell. The first filter screen is located inside the second filter screen. The upper end of the protective shell is covered with a top cover. A clamping cover, a first clamping ring and a second clamping ring are fixedly connected to the lower end of the top cover concentrically. The first clamping ring is located between the clamping cover and the second clamping ring. The clamping cover is threadedly connected to the upper inner part of the first filter screen. The first clamping ring is sleeved and threadedly connected to the outer side of the upper end of the first filter screen. The second clamping ring is sleeved and threadedly connected to the outer side of the upper end of the second filter screen. A fixing ring is sleeved and fixedly connected to the outer side of the top cover. Four connecting ropes are fixedly connected to the upper end of the fixing ring at equal intervals. The upper ends of the four connecting ropes are fixedly connected to a carrying ring together. The output end of the water pump is fixedly connected with a first water pipe and a second water pipe. The first water pipe sequentially passes through the carrying ring, the top cover and the clamping cover. A positioning ring is sleeved and fixedly connected to the outer part of the part of the first water pipe located inside the carrying ring. The positioning ring is rotatably connected to the inside of the carrying ring.

[0007] As a preferred scheme of the utility model, the weight block is in a frustum shape with the smaller diameter end facing downwards, and the upper end diameter of the weight block is the same as the outer diameter of the protective shell.

[0008] As a preferred solution of the present utility model, the lower end of the fixing ring is sleeved and rotatably connected to the outer side of the protective shell, and a plurality of friction grooves are equidistantly arranged on the circumferential outer wall of the fixing ring.

[0009] As a preferred solution of the present utility model, the first water pipe is rotatably connected to the carrier ring, the top cover and the clamping cover.

[0010] As a preferred solution of the present utility model, both the first filter screen and the second filter screen are located on the same vertical center line as the protective shell, and the aperture of the first filter screen is smaller than that of the second filter screen.

[0011] Compared with the prior art, the beneficial effect of the sample extraction device for detecting trichloroethylene in groundwater of the present utility model is as follows: by arranging a protective shell equipped with a first filter screen and a second filter screen at the end of the first water pipe, the present utility model can filter out foreign matters in the groundwater that are likely to cause blockage, prevent foreign matters from entering the water pump and causing blockage, and the protective shell can protect the first filter screen and the second filter screen while filtering, avoiding damage. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only individual cases of the embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0013] Figure 1 It is a schematic cross-sectional structure diagram of an embodiment of the present utility model;

[0014] Figure 2 It is a schematic external structure diagram of an embodiment of the present utility model;

[0015] Figure 3 It is a schematic structure diagram of the lower end of the top cover in an embodiment of the present utility model;

[0016] Figure 4 It is a schematic structure diagram of the fixing ring in an embodiment of the present utility model.

[0017] Reference numerals: water pump 1, protective shell 2, weight block 3, positioning ring 4, first filter screen 5, second filter screen 6, top cover 7, clamping cover 8, first clamping ring 9, second clamping ring 10, fixing ring 11, friction groove 12, connecting rope 13, carrier ring 14, through hole 15, first water pipe 16, second water pipe 17. Detailed Embodiments

[0018] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention more clear and understandable, the following further describes the embodiments of the present invention in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present invention.

[0020] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the communication inside two elements; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0021] See Figures 1-4 As shown, the sample extraction device for detecting trichloroethylene in groundwater in the embodiment of the present utility model includes a water pump 1 and a protective shell 2. The protective shell 2 has a cylindrical structure with an upward opening. A plurality of through holes 15 are equidistantly arranged on the circumferential outer wall of the protective shell 2. A weight block 3 is fixedly connected to the outer wall of the lower end of the protective shell 2.

[0022] A first filter screen 5 and a second filter screen 6 are vertically and fixedly connected to the inner wall of the lower end of the protective shell 2. The first filter screen 5 is located inside the second filter screen 6. The upper end of the protective shell 2 is covered with a top cover 7. A clamping cover 8, a first clamping ring 9 and a second clamping ring 10 are fixedly connected to the lower end of the top cover 7 concentrically. The first clamping ring 9 is located between the clamping cover 8 and the second clamping ring 10.

[0023] The clamping cover 8 is threadedly connected to the upper end inside the first filter screen 5. The first clamping ring 9 is sleeved and threadedly connected to the outer side of the upper end of the first filter screen 5. The second clamping ring 10 is sleeved and threadedly connected to the outer side of the upper end of the second filter screen 6. A fixing ring 11 is sleeved and fixedly connected to the outer side of the top cover 7. Four connecting ropes 13 are fixedly connected to the upper end of the fixing ring 11 at equal intervals. The upper ends of the four connecting ropes 13 are commonly fixedly connected to a load-bearing ring 14.

[0024] The output end of the water pump 1 is fixedly connected with a first water pipe 16 and a second water pipe 17. The first water pipe 16 sequentially penetrates through the carrier ring 14, the top cover 7 and the clamping cover 8. A positioning ring 4 is sleeved and fixedly connected to the outer side of the part of the first water pipe 16 located inside the carrier ring 14, and the positioning ring 4 is rotatably connected inside the carrier ring 14.

[0025] The first water pipe 16 is rotatably connected to the carrier ring 14, the top cover 7 and the clamping cover 8. The top cover 7 can be connected to the first water pipe 16. Both the first filter screen 5 and the second filter screen 6 are on the same vertical line as the protective shell 2. The aperture of the first filter screen 5 is smaller than that of the second filter screen 6, which is convenient for stratified filtration of underground water. The load-bearing block 3 is in a frustum shape with the smaller-diameter end facing downwards. The upper end diameter of the load-bearing block 3 is the same as the outer diameter of the protective shell 2, which is convenient for quickly sinking the protective shell 2 into the underground water. The lower end of the fixing ring 11 is sleeved and rotatably connected to the outer side of the protective shell 2. A number of friction grooves 12 are equidistantly arranged on the circumferential outer wall of the fixing ring 11. When disassembling and assembling the top cover 7 and the protective shell 2, hold the top cover 7.

[0026] When the embodiment of the present utility model is in use, connect the power supply and gradually put the end of the first water pipe 16 into the underground water. The setting of the load-bearing block 3 can ensure that the protective shell 2 together with the end of the first water pipe 16 can vertically sink into the underground water, and the underground water sequentially passes through the through holes 15, the second filter screen 6 and the first filter screen 5. Start the water pump 1. The water pump 1 extracts the filtered underground water through the first water pipe 16 and discharges the extracted underground water sample into the storage device through the second water pipe 17 to complete the sample collection work. Then, when cleaning the foreign matters in the protective shell 2, grasp the fixing ring 11, rotate and remove the top cover 7, pour out the accumulated foreign matters inside, and at the same time, the first filter screen 5 and the second filter screen 6 can be washed with water to wash off the foreign matters attached to the first filter screen 5 and the second filter screen 6, and then the top cover 7 is re-threadedly connected to the upper end of the protective shell 2.

[0027] The above shows and describes the basic principles of the present invention. The above is only the preferred embodiment of the present invention and is not used to limit the present invention. The descriptions in the above embodiments and the specification only illustrate the principles of the present invention. Without departing from the scope of the present invention, any modifications, equivalent replacements and improvements made within the spirit and scope of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sample extraction device for detecting trichloroethylene in groundwater, characterized in that: It includes a water pump (1) and a protective shell (2). The protective shell (2) has a cylindrical structure with an upward opening. A number of through holes (15) are equidistantly arranged on the circumferential outer wall of the protective shell (2). A weight block (3) is fixedly connected to the lower outer wall of the protective shell (2). A first filter screen (5) and a second filter screen (6) are vertically fixedly connected to the inner wall of the lower end of the protective shell (2). The first filter screen (5) is located inside the second filter screen (6). The upper end of the protective shell (2) is covered with a top cover (7). A clamping cover (8), a first clamping ring (9) and a second clamping ring (10) are fixedly connected to the lower end of the top cover (7) concentrically. The first clamping ring (9) is located between the clamping cover (8) and the second clamping ring (10). The clamping cover (8) is threadedly connected to the upper inner part of the first filter screen (5). The first clamping ring (9) is sleeved and threadedly connected to the outer side of the upper end of the first filter screen (5). The second clamping ring (10) is sleeved and threadedly connected to the outer side of the upper end of the second filter screen (6). A fixing ring (11) is sleeved and fixedly connected to the outer side of the top cover (7). Four connecting ropes (13) are fixedly connected to the upper end of the fixing ring (11) equidistantly. The upper ends of the four connecting ropes (13) are jointly fixedly connected to a load ring (14). The output end of the water pump (1) is fixedly connected to a first water pipe (16) and a second water pipe (17). The first water pipe (16) sequentially penetrates through the load ring (14), the top cover (7) and the clamping cover (8). A positioning ring (4) is sleeved and fixedly connected to the outer side of the part of the first water pipe (16) located inside the load ring (14). The positioning ring (4) is rotatably connected to the inside of the load ring (14).

2. The sample extraction device for detecting trichloroethylene in groundwater according to claim 1, wherein: The weight block (3) has a frustum-shaped structure with the smaller-diameter end facing downward. The upper diameter of the weight block (3) is the same as the outer diameter of the protective shell (2).

3. The sample extraction device for detecting trichloroethylene in groundwater according to claim 1, wherein: The lower end of the fixing ring (11) is sleeved and rotatably connected to the outer side of the protective shell (2). A number of friction grooves (12) are equidistantly arranged on the circumferential outer wall of the fixing ring (11).

4. The sample extraction device for detecting trichloroethylene in groundwater according to claim 1, wherein: The first water pipe (16) is rotatably connected to the load ring (14), the top cover (7) and the clamping cover (8).

5. The sample extraction device for detecting trichloroethylene in groundwater according to claim 1, characterized in that: Both the first filter screen (5) and the second filter screen (6) are on the same vertical line as the protective shell (2). The pore size of the first filter screen (5) is smaller than that of the second filter screen (6).

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