Water sample filtering device for environmental detection

Abstract

The utility model discloses an environment detection water sample filtering device which comprises a filtering pipe, an extrusion plate which is in sliding connection with the inner wall of the filtering pipe is installed on the upper portion of an inner cavity of the filtering pipe, a pipe joint is connected to the bottom end of the filtering pipe in an internal threaded mode, an inner filter element and an outer filter element are installed on the pipe joint, and the outer filter element is arranged outside the inner filter element in a sleeved mode. An inner positioning cylinder for mounting the inner filter element and an outer positioning cylinder for mounting the outer filter element are arranged at the inner end part of the pipe joint, an inner sealing ring is arranged between the opening end of the inner filter element and the pipe joint, and an outer sealing ring is arranged between the opening end of the outer filter element and the pipe joint; the bottom of the pipe joint is in threaded connection with a reagent bottle. According to the environment detection water sample filtering device provided by the utility model, double filtration can be realized, and a filtering element in the environment detection water sample filtering device is convenient to disassemble, assemble and maintain; the filter can be extruded and filtered along the longitudinal direction and also can be extruded and filtered along the transverse direction, so that the practicability is improved, and the problem of splashing in the water outlet process is avoided.

Description

Technical Field

[0001] The utility model relates to an environment detection water sample filtering device, belonging to the technical field of water sample filtering. Background Art

[0002] In environmental testing work, water samples often need to be filtered, and a filtering device is needed to filter water samples.

[0003] Application No. CN202223444598.2 discloses a water sample filtering device, including a hollow cylinder, a force-bearing plate slidably connected to the top of the inner wall of the hollow cylinder, a connecting column fixedly connected to the middle of the top of the force-bearing plate, a handle fixedly connected to the top of the connecting column, a spring fixedly connected to the bottom of the force-bearing plate, a pressure plate fixedly connected to the bottom end of the spring, and an impurity filter plate fixedly connected to the middle of the inner wall of the hollow cylinder.

[0004] The filtering device disclosed in the above patent can squeeze the water sample to speed up the water passing through the filter, thereby reducing the filtering time. However, the device still has the following shortcomings during use:

[0005] 1. The multi-layer filter plates are fixedly installed on the hollow cylinder. When the filter plates, especially the bottom filter plates, are clogged and affect normal use, it is inconvenient to disassemble and maintain them;

[0006] 2. It can only be squeezed and filtered along the longitudinal direction, but not horizontally, and its practicality can be improved;

[0007] 3. After filtration, the water sample is prone to splashing when it falls into the water storage cup through the water outlet plate.

[0008] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0009] In view of the deficiencies in the background technology, the utility model provides an environmental detection water sample filtering device, which can realize double filtration and facilitate the disassembly and maintenance of the filtering elements inside it; it can be squeezed and filtered along the longitudinal direction and along the transverse direction, thereby improving its practicality and preventing splashing during the water discharge process.

[0010] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0011] The environmental testing water sample filtering device comprises a filter tube, an extrusion plate slidably connected to the inner wall of the filter tube is installed on the upper part of the inner cavity of the filter tube, a pipe joint is connected to the inner thread of the bottom end of the filter tube, an inner filter element and an outer filter element are installed on the pipe joint, and the outer filter element is sleeved on the outside of the inner filter element; an inner positioning cylinder for installing the inner filter element and an outer positioning cylinder for installing the outer filter element are provided on the inner end of the pipe joint, an inner sealing ring is provided between the open end of the inner filter element and the pipe joint, and an outer sealing ring is provided between the open end of the outer filter element and the pipe joint; a reagent bottle is connected to the bottom thread of the pipe joint.

[0012] Furthermore, the inner filter element and the outer filter element are both stainless steel filter elements, which are composed of multiple layers of stainless steel sintered mesh, and the filtering accuracy of the inner filter element is greater than the filtering accuracy of the outer filter element.

[0013] Furthermore, the inner positioning cylinder is connected to the bottom opening end of the inner filter element by means of threads, and the outer positioning cylinder is connected to the bottom opening end of the outer filter element by means of threads.

[0014] Furthermore, the inner sealing ring and the outer sealing ring are both O-rings.

[0015] Furthermore, a water outlet hole and an internal threaded hole are sequentially arranged inside the pipe joint along the vertical direction, the top of the water outlet hole is connected to the inner cavity of the inner filter element, the bottom of the water outlet hole is connected to the internal threaded hole, and the aperture of the internal threaded hole is larger than the aperture of the water outlet hole.

[0016] Furthermore, the bottle mouth of the reagent bottle is threadedly connected to the internal threaded hole.

[0017] Furthermore, the extrusion plate is fixedly connected to the bottom end of the screw, the main body of the screw is threadedly connected to the top end of the filter tube, and the top end of the screw is fixedly connected to a handle for facilitating its rotation.

[0018] Furthermore, a water inlet pipe is provided on the side of the filter tube near the top thereof, and a funnel-shaped water inlet is provided on the end of the water inlet pipe away from the filter tube.

[0019] Furthermore, a valve for controlling the water flow is installed on the water inlet pipe.

[0020] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0021] The squeezing plate is driven to move spirally by twisting the handle, thereby compressing the water sample. After being filtered by the outer filter element and the inner filter element in sequence, the water sample is collected in the inner cavity of the inner filter element, and then enters the reagent bottle from the water outlet for storage. There will be no splashing problem during the water outlet process.

[0022] The inner and outer filter elements in the utility model are threadedly connected to the pipe joint, and the pipe joint and the filter pipe are threadedly connected. When the inner and outer filter elements are blocked and affect normal use, it is convenient to disassemble and maintain them;

[0023] The utility model can be used for extrusion and filtration in the longitudinal direction as well as in the transverse direction, thus significantly improving its practicability.

[0024] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model;

[0026] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0027] Figure 3 It is a schematic diagram of the connection between the pipe joint and the inner and outer filter elements.

[0028] In the figure, 1-filter tube, 2-pipe joint, 201-inner positioning cylinder, 202-outer positioning cylinder, 203-water outlet, 204-inner threaded hole, 3-inner filter element, 4-inner sealing ring, 5-outer filter element, 6-outer sealing ring, 7-reagent bottle, 8-extrusion plate, 9-screw, 10-water inlet pipe, 11-water inlet, 12-valve. DETAILED DESCRIPTION

[0029] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0030] like Figure 1-Figure 3 As shown together, the utility model provides an environmental detection water sample filtering device, including a filter tube 1, the filter tube 1 is made of transparent material, the bottom end of the filter tube 1 is internally threadedly connected with a pipe joint 2, an inner filter element 3 and an outer filter element 5 are installed on the pipe joint 2, and the outer filter element 5 is sleeved on the outside of the inner filter element 3.

[0031] The inner filter element 3 and the outer filter element 5 are both stainless steel filter elements, which are composed of multiple layers of stainless steel sintered mesh, and the filtering accuracy of the inner filter element 3 is greater than that of the outer filter element 5.

[0032] The inner end of the pipe joint 2 is provided with an inner positioning cylinder 201 for installing the inner filter element 3 and an outer positioning cylinder 202 for installing the outer filter element 5. The inner positioning cylinder 201 is threadedly connected to the bottom opening end of the inner filter element 3, and the outer positioning cylinder 202 is threadedly connected to the bottom opening end of the outer filter element 5.

[0033] An inner sealing ring 4 is provided between the open end of the inner filter element 3 and the pipe joint 2. During the threaded connection between the inner filter element 3 and the inner positioning cylinder 201, the inner sealing ring 4 is pressed to achieve sealing. An outer sealing ring 6 is provided between the open end of the outer filter element 5 and the pipe joint 2. During the threaded connection between the outer filter element 5 and the outer positioning cylinder 202, the outer sealing ring 6 is pressed to achieve sealing.

[0034] The inner sealing ring 4 and the outer sealing ring 6 are both O-rings.

[0035] The pipe joint 2 is provided with a water outlet hole 203 and an internal threaded hole 204 in sequence along the vertical direction. The top of the water outlet hole 203 is connected to the inner cavity of the inner filter element 3, and the bottom of the water outlet hole 203 is connected to the internal threaded hole 204. The aperture of the internal threaded hole 204 is larger than that of the water outlet hole 203.

[0036] A reagent bottle 7 is installed at the bottom of the pipe joint 2 , and the mouth of the reagent bottle 7 is threadedly connected to the internal threaded hole 204 .

[0037] An extrusion plate 8 slidably connected to the inner wall of the filter tube 1 is installed on the upper part of the inner cavity of the filter tube 1. The extrusion plate 8 is fixed to the bottom end of the screw 9. The main body of the screw 9 is threadedly connected to the top end of the filter tube 1. A handle is fixed to the top end of the screw 9 to facilitate its rotation.

[0038] The filter tube 1 is provided with a water inlet pipe 10 on its side near the top thereof, and a funnel-shaped water inlet 11 is provided on the end of the water inlet pipe 10 away from the filter tube 1 . A valve 12 for controlling water flow is installed on the water inlet pipe 10 .

[0039] The specific working principle of this utility model:

[0040] Open the valve 12, and after the water sample enters the inner cavity of the filter tube 1 through the water inlet 11, close the valve 12; turn the handle to drive the squeezing plate 8 to spirally move, thereby compressing the water sample. After the water sample is filtered in turn by the outer filter element 5 and the inner filter element 3, it is collected in the inner cavity of the inner filter element 3, and then enters the reagent bottle 7 from the water outlet 203 for storage; after the filtration is completed, the sample liquid mixed with large solid impurities remaining in the filter tube 1 can be refluxed and discharged from the water inlet pipe 10.

[0041] The inner and outer filter elements of the utility model are threadedly connected to the pipe joint, and the pipe joint and the filter pipe are threadedly connected. When the inner and outer filter elements are blocked and the normal use is affected, it is convenient to disassemble and maintain them.

[0042] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. Environmental testing water sample filtering device, characterized by: The invention comprises a filter tube (1), wherein an extrusion plate (8) slidably connected to the inner wall of the filter tube (1) is installed at the upper part of the inner cavity of the filter tube (1), a pipe joint (2) is internally threadedly connected to the bottom end of the filter tube (1), an inner filter element (3) and an outer filter element (5) are installed on the pipe joint (2), and the outer filter element (5) is sleeved on the outside of the inner filter element (3); an inner positioning cylinder (201) for installing the inner filter element (3) and an outer positioning cylinder (202) for installing the outer filter element (5) are provided on the inner end of the pipe joint (2), an inner sealing ring (4) is provided between the open end of the inner filter element (3) and the pipe joint (2), and an outer sealing ring (6) is provided between the open end of the outer filter element (5) and the pipe joint (2); and a reagent bottle (7) is threadedly connected to the bottom of the pipe joint (2).

2. The environmental detection water sample filtering device according to claim 1, characterized in that: The inner filter element (3) and the outer filter element (5) are both stainless steel filter elements, formed by multiple layers of stainless steel sintered mesh, and the filtering accuracy of the inner filter element (3) is greater than the filtering accuracy of the outer filter element (5).

3. The environmental detection water sample filtering device according to claim 1, characterized in that: The inner positioning cylinder (201) is connected to the bottom opening end of the inner filter element (3) by means of threads, and the outer positioning cylinder (202) is connected to the bottom opening end of the outer filter element (5) by means of threads.

4. The environmental testing water sample filtering device according to claim 1, characterized in that: The inner sealing ring (4) and the outer sealing ring (6) are both O-rings.

5. The environmental testing water sample filtering device according to claim 1, characterized in that: The pipe joint (2) is provided with a water outlet hole (203) and an internal threaded hole (204) in sequence along the vertical direction; the top of the water outlet hole (203) is connected to the inner cavity of the inner filter element (3); the bottom of the water outlet hole (203) is connected to the internal threaded hole (204); and the aperture of the internal threaded hole (204) is larger than the aperture of the water outlet hole (203).

6. The environmental testing water sample filtering device according to claim 5, characterized in that: The bottle mouth of the reagent bottle (7) is threadedly connected to the internal threaded hole (204).

7. The environmental detection water sample filtering device according to claim 1, characterized in that: The extrusion plate (8) is fixedly connected to the bottom end of the screw rod (9), the main body of the screw rod (9) is threadedly connected to the top end of the filter tube (1), and a handle is fixedly connected to the top end of the screw rod (9) to facilitate its rotation.

8. The environmental testing water sample filtering device according to claim 1, characterized in that: A water inlet pipe (10) is provided on the side of the filter tube (1) close to the top end thereof, and a funnel-shaped water inlet (11) is provided on the end of the water inlet pipe (10) away from the filter tube (1).

9. The environmental detection water sample filtering device according to claim 8, characterized in that: The water inlet pipe (10) is provided with a valve (12) for controlling the flow of water.

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