Filtering connection structure based on eptfe semi-permeable membrane

Abstract

The utility model relates to gas monitoring technical field discloses a kind of filtering connection structure based on EPTFE semi-permeable membrane, including air cock unit, pagoda connection unit;Air cock unit includes air cock pedestal, air cock tube connected with body monitor is equipped in air cock pedestal one side, air cock pedestal other side is equipped with external thread interface A;Pagoda connection unit includes pagoda joint body, pagoda joint body one side is equipped with internal thread interface, pagoda joint body other side is equipped with pagoda joint;Pagoda connection unit is placed after EPTFE filter element in internal thread interface, and sealing connection is realized by screwing into the external thread interface A of air cock unit.The utility model uses EPTFE semi-permeable membrane to replace ordinary PVDF filter membrane as the filtering connection structure of monitor sampling, effectively blocks moisture and particulate matter into drift tube, provides clean and stable detection environment in drift tube, while enhancing the anti-interference ability of monitor in complex environment, improve resolving power, prolong the service life of filter element.

Description

Technical Field

[0001] This utility model relates to the field of gas monitoring technology, specifically a filter connection structure based on an EPTFE semi-permeable membrane. Background Technology

[0002] Gas monitors typically use a filter connection structure at the sampling port to filter samples for moisture, particulate matter, and other impurities. Currently, PVDF (polyvinylidene fluoride) is commonly used as the filter element. However, PVDF filters have low filtration efficiency, and under humid and heavily polluted conditions, their lifespan is short. They are also frequently contaminated by large particulate pollutants such as vehicle exhaust and fumes, leading to pollution and clogging.

[0003] Due to these issues, PVDF filter elements often need to be replaced during actual use, which increases operating costs and reduces work efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a filter connection structure based on an EPTFE semi-permeable membrane, which can efficiently block impurities such as moisture and particulate matter from entering the sampling pipeline of the monitor. This provides a clean environment for the monitor to detect toxic and harmful gases in the environment, such as phosphorus-containing gases, sulfur-containing gases, and benzene compounds, thereby improving the monitoring performance of the instrument.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a filter connection structure based on an EPTFE semi-permeable membrane, including an air nozzle unit and a pagoda connection unit;

[0006] The nozzle unit includes a nozzle base, with a nozzle tube connected to the body monitor on one side and an external threaded interface A on the other side. The pagoda connection unit includes a pagoda connector body, with an internal threaded interface on one side and a pagoda connector on the other side. An EPTFE filter element is placed inside the internal threaded interface of the pagoda connection unit and then screwed into the external threaded interface A of the nozzle unit to achieve a sealed connection.

[0007] As a further technical solution, a rain cap is installed on the pagoda connector body. The pagoda connector is located inside the rain cap, which can effectively block external rainwater and prevent rainwater from directly intruding into the filter connection structure.

[0008] As a further technical solution, the pagoda connector body is also provided with an external threaded interface B, and a rainproof cap is installed on the external threaded interface B of the pagoda connecting unit.

[0009] As a further technical solution, the external thread interface B is arranged adjacent to the internal thread interface.

[0010] As a further technical solution, positioning holes are provided at the four corners of the gas nozzle base surface for fixing the filter connection structure to the gas monitor or supporting equipment.

[0011] As a further technical solution, the EPTFE filter element consists of a circular outer ring and an inner EPTFE semi-permeable membrane.

[0012] As a further technical solution, the inner diameter of the circular outer ring is 9.1 mm.

[0013] As a further technical solution, the EPTFE semipermeable membrane has an outer diameter of 9.1 mm, a pore size of 0.22 μm, and a thickness of 0.5 mm.

[0014] The filter element is made of EPTFE membrane material with a special microporous morphology, which can selectively allow the target gas to pass through while intercepting liquid and solid impurities. It is installed between the pagoda connection unit and the gas nozzle unit and relies on its own microporous structure to achieve gas permeation filtration, ensuring the purity of the gas entering the monitor.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention uses an EPTFE semi-permeable membrane to replace the ordinary PVDF filter membrane as the filtration connection structure for the monitoring instrument sampling. This effectively blocks moisture and particulate matter from entering the drift tube, providing a clean and stable detection environment inside the drift tube. At the same time, it enhances the monitoring instrument's anti-interference ability in complex environments, improves resolution, and extends the service life of the filter. Attached Figure Description

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This diagram shows the filter connection structure of a gas monitor.

[0019] In the diagram, 1-air nozzle base; 11-air nozzle tube; 12-external threaded interface A; 2-pagoda connector body; 21-internal threaded interface; 22-pagoda connector; 23-external threaded interface B; 3-EPTFE filter element; 31-circular outer ring; 4-rain cap. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example: Reference Figure 1 The illustrated filter connection structure based on an EPTFE semi-permeable membrane includes a nozzle unit and a pagoda connection unit. The nozzle unit includes a nozzle base 1, with a nozzle tube 11 connected to a body monitor on one side and an external threaded interface A12 on the other side. The pagoda connection unit includes a pagoda connector body 2, with an internal threaded interface 21 on one side and a pagoda connector 22 on the other side. An EPTFE filter element 3 is placed inside the internal threaded interface 21 of the pagoda connection unit and then screwed into the external threaded interface A12 of the nozzle unit to achieve a sealed connection.

[0022] refer to Figure 1 As shown, a rain cap 4 is installed on the pagoda connector body 2. The pagoda connector 22 is located inside the rain cap 4. The rain cap 4 can effectively block external rainwater and prevent rainwater from directly intruding into the filter connection structure.

[0023] Furthermore, the pagoda connector body 2 is also provided with an external threaded connector B23, which is arranged adjacent to the internal threaded connector 21. The pagoda connection unit is fitted with a rain cap 4 through the external threaded connector B23.

[0024] The surface of the gas nozzle base 1 is rectangular, and positioning holes are provided at the four corners of the rectangle for fixing the filter connection structure to the gas monitor or supporting equipment.

[0025] Furthermore, the EPTFE filter element 3 consists of a circular outer ring 31 and an internal EPTFE semi-permeable membrane. The inner diameter of the circular outer ring 31 is 9.1 mm; the outer diameter of the EPTFE semi-permeable membrane is 9.1 mm, the pore size is 0.22 μm, and the thickness is 0.5 mm.

[0026] The filter element is made of EPTFE membrane material with a special microporous morphology, which allows the target gas to pass through selectively while intercepting liquid and solid impurities. Installed between the pagoda-shaped connection unit and the nozzle base, it relies on its own microporous structure to achieve gas permeation filtration, ensuring the purity of the gas entering the monitor.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A filtration connection structure based on an EPTFE semi-permeable membrane, characterized in that: Includes the air nozzle unit and the pagoda connection unit; The nozzle unit includes a nozzle base (1), a nozzle tube (11) connected to the body monitor is provided on one side of the nozzle base (1), and an external threaded interface A (12) is provided on the other side of the nozzle base (1). The pagoda connection unit includes a pagoda connector body (2), with an internal thread interface (21) on one side and a pagoda connector (22) on the other side. After placing the EPTFE filter element (3) inside the internal thread interface (21) of the pagoda connection unit, a sealed connection is achieved by screwing it into the external thread interface A (12) of the air nozzle unit.

2. The filtration connection structure of the EPTFE semi-permeable membrane according to claim 1, characterized in that: The pagoda connector body (2) is equipped with a rain cap (4), and the pagoda connector (22) is located inside the rain cap (4).

3. The filtration connection structure of the EPTFE semi-permeable membrane according to claim 2, characterized in that: The pagoda connector body (2) is also provided with an external thread interface B (23), and a rain cap (4) is installed on the external thread interface B (23) of the pagoda connection unit.

4. The filtration connection structure of the EPTFE semi-permeable membrane according to claim 3, characterized in that: The external thread interface B (23) is arranged adjacent to the internal thread interface (21).

5. The filtration connection structure of the EPTFE semi-permeable membrane according to claim 1, characterized in that: Positioning holes are provided at the four corners of the surface of the air nozzle base (1).

6. The filtration connection structure of the EPTFE semi-permeable membrane according to claim 1, characterized in that: The EPTFE filter element (3) consists of a circular outer ring (31) and an internal EPTFE semi-permeable membrane.

7. The filtration connection structure of the EPTFE semi-permeable membrane according to claim 6, characterized in that: The inner diameter of the circular outer ring (31) is 9.1 mm.

8. The filtration connection structure of the EPTFE semi-permeable membrane according to claim 7, characterized in that: The EPTFE semipermeable membrane has an outer diameter of 9.1 mm, a pore size of 0.22 μm, and a thickness of 0.5 mm.

Images