Novel needle tube type water sample suction filtration device

Abstract

The utility model provides a novel needle tube type water sample suction filtration device which comprises a needle cylinder, a core rod arranged in the needle cylinder and a needle tube arranged at the front end of the needle cylinder, a piston arranged on the inner cavity wall of the needle cylinder in a sliding mode is arranged at the front end of the core rod, a pressing handle is arranged at the rear end of the core rod, and the needle tube comprises a conical sleeve and a needle head connected with the conical sleeve. A filter screen is arranged in the needle head. According to different suction filtration requirements, the filter screens with different pores can be replaced, so that redundant water in a water sample can be effectively extracted; bottom sediment disturbance in the water sample is prevented; algae and the like are prevented from being pumped out when redundant water is pumped out, and meanwhile sediments needed by experiments are reserved.

Description

Technical Field

[0001] The utility model relates to the field of water sample monitoring, in particular to a novel needle-tube type water sample extraction and filtration device. Background Art

[0002] The water quality test results can reflect the eutrophication or pollution level of the water source in real time, and timely measures can be taken to treat the water source. Therefore, the accuracy and stability of the water quality test results must be guaranteed to effectively guide the water quality control work.

[0003] Water quality testing is a systematic and scientific test and analysis of various existing water sources, with the aim of ensuring the correct operation of water treatment. According to the types and indicators of pollutants, the main items of water quality testing can be divided into two types, namely conventional indicators and unconventional indicators. Conventional indicators mainly include sensory properties and general chemical indicators, toxicological indicators, microbial indicators and radioactive indicators. Among them, algae species and algae density are important indicators of the microbial status in water samples. However, at present, the filtration device that effectively retains algae in water samples is not perfect, and it is often inevitable to filter out effective precipitation and microorganisms when using experimental instruments. Utility Model Content

[0004] The utility model aims to provide a novel needle-tube water sample extraction and filtration device to solve the problem that algae and effective precipitation in a water sample cannot be efficiently retained before the water sample is tested.

[0005] A novel needle tube water sample extraction and filtration device comprises a syringe, a core rod placed in the syringe, and a needle tube arranged at the front end of the syringe. The front end of the core rod is provided with a piston slidably arranged on the inner wall of the syringe, and the rear end of the core rod is provided with a button. The needle tube comprises a conical sleeve and a needle connected to the conical sleeve, and a filter is arranged inside the needle.

[0006] Furthermore, the pore diameter of the filter is not greater than 1 mm.

[0007] The utility model has the following effects: 1. According to different filtration requirements, filters with different pores can be replaced to effectively extract excess water in the water sample; 2. It can prevent the bottom sedimentation disturbance in the water sample; 3. It can prevent algae and the like from being extracted when extracting excess water, while retaining the sediment required for the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the overall structure of a new needle-tube water sample extraction and filtration device of the utility model;

[0009] Figure 2 It is a cross-sectional view of a novel needle-tube water sample extraction and filtration device of the utility model;

[0010] Figure 3This is a detailed structural diagram of a new needle-tube water sample extraction and filtration device of the utility model.

[0011] In the figure: 1—syringe; 2—core rod; 3—handle; 4—needle; 5—conical sleeve; 6—filter; 7—piston. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] See also Figure 1-3 The embodiment of the utility model provides a novel needle-tube water sample extraction and filtration device, which is suitable for monitoring algae species and algae density in water samples in laboratories, and can effectively extract algae and other sediments in water samples.

[0014] The device includes a syringe 1, a core rod 2, a handle 3, a needle 4, a conical sleeve 5, a filter 6, and a piston 7; the core rod 2 is placed in the syringe 1, the front end of the core rod 2 is provided with a piston 7 slidably arranged on the inner wall of the syringe 1, and the rear end of the core rod 2 is provided with a handle 3; the front end of the syringe 1 is provided with a needle tube, the needle tube includes a conical sleeve 5 and a needle 4 connected to the conical sleeve 5, and a filter 6 is arranged inside the needle 4. Among them, the conical sleeve 5 is designed to be conical, which can increase the internal pressure of the cavity of the suction filtration device, so that the water passing through the filter 6 is fully filtered. The pore size of the filter 6 can be replaced according to the suction filtration requirements of different water bodies to be tested. During the suction filtration process, by placing the front end of the suction filtration device into the water body to be tested and slowly pulling the handle 3, the excess water in the water sample can be better removed, thereby effectively preserving algae and other precipitation in the water body.

[0015] In the specific implementation, a syringe 1 with accurate range and scale is selected, and the needle tube is relatively thin, so as to reduce the algae and effective precipitation in the water sample from being sucked in as much as possible. In addition, the filter screen 6 installed in the needle head 4 has a diameter not greater than 1 mm (the pore diameter of the filter screen can be changed according to the actual filtration needs). The smaller the filter hole, the more effective it is to retain the algae in the water sample, thereby ensuring the quality of water sample detection. The front end of the needle tube is designed as a conical sleeve 5, so that during the filtration process, due to its conical structure, the water filtration pressure can be increased, and the water body can be better filtered.

[0016] When in use, first push the handle 3 completely into the syringe 1, exhaust the air in the syringe 1, and then insert the needle 4 into the water sample bottle to be tested. After ensuring that the needle 4 is always submerged in the water, pull out the handle 3 of the syringe, and repeat this operation until the amount of water in the water sample bottle meets the corresponding requirements, so as to achieve the purpose of extracting water from the water sample but retaining algae and sediment in the water body. In the filtration process, the conical sleeve 5 can increase the filtration pressure of the water body due to its conical structure, and better filter the water body.

[0017] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by technicians in this technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A novel needle-tube water sample extraction and filtration device, comprising a syringe, a core rod placed in the syringe, and a needle tube arranged at the front end of the syringe, the front end of the core rod is provided with a piston slidably arranged on the inner wall of the syringe, and the rear end of the core rod is provided with a handle, characterized in that: The needle tube comprises a conical sleeve and a needle connected to the conical sleeve, and a filter screen is arranged inside the needle.

2. The novel needle-tube water sample extraction and filtration device as claimed in claim 1, characterized in that: The filter mesh pore diameter is no greater than 1 mm.

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