CN211235744U

CN211235744U - Gas detector and sample introduction filter head thereof

Info

Publication number: CN211235744U
Application number: CN201921994399.4U
Authority: CN
Inventors: 陈彬彬; 杨秀霞
Original assignee: Guangzhou Jinsheng Instrument Technology Co ltd
Current assignee: Guangzhou Jinsheng Instrument Technology Co ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-08-11
Anticipated expiration: 2029-11-19

Abstract

The utility model provides a kind filter head and a gas detector advance, should advance a kind filter head including: the device comprises a water draining mechanism (1), an air filtering mechanism (2) and a pipeline mechanism (3), wherein the water draining mechanism (1) is provided with a water draining filter shell (10) and a water draining filter (11), and the water draining filter (11) is arranged in the water draining filter shell (10); the air filter mechanism (2) is provided with an air filter shell (20), an air filter (21) and a filter bowl (22); the conduit means (3) has an elongate compression tube (31), an elongate inlet tube (32) and a pressure connection (33). The utility model discloses the advance a kind filter head that can filter multiple impurity has been used to make gas just by the primary screening filtration before getting into the sensor room by the sample, make gaseous detection appearance have more the pertinence to the gaseous detection of purpose, avoided impurity to the interference of testing result.

Description

Gas detector and sample introduction filter head thereof

Technical Field

The utility model relates to a gaseous detection technology field, concretely relates to a gas detection appearance that is used for advancing kind filter head and has applied this kind of kind filter head of sampling.

Background

The gas detector is an instrument tool for detecting gas leakage concentration, which comprises: portable gas detectors, hand-held gas detectors, stationary gas detectors, online gas detectors, and the like. Gas sensors are used to detect the types of gases present in the environment, gas sensors are sensors used to detect the composition and content of gases.

During the production and development process related to the technology for many years, the applicant of the present application finds that the existing gas detector at least has the following technical problems:

in a conventional gas detector, generally, a gas screening process entering the inside of the gas detector is rough (only one sample inlet pipe is arranged), so that gas impurities finally detected by a sensor are excessive, the sensor is easily damaged or the detection efficiency of the sensor is too slow, and the detection accuracy of the sensor is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a consequently, advance kind filter, this advance kind filter can solve under the existing conditions gaseous screening that lacks of gas detector make the gaseous difficult problem that does not have the pertinence that gets into the sensor and detect.

The utility model also provides a gaseous detector, this gaseous detector have utilized foretell advance a kind filter, therefore can solve under the existing conditions gaseous of gaseous detector and lack the screening and make the gaseous difficult problem that does not have the pertinence that gets into the sensor and detect.

In order to solve the technical problem, the utility model discloses following technical scheme can be adopted:

the utility model provides a kind filter head for filter the gas that gets into gaseous detector, a serial communication port, including: a hydrophobic mechanism 1 having a hydrophobic filter housing 10 and a hydrophobic filter 11, the hydrophobic filter 11 being disposed in the hydrophobic filter housing 10; an air filter mechanism 2 having an air filter housing 20, an air filter 21 and a filter bowl 22, wherein the air filter 21 is loaded in the filter bowl 22, the filter bowl 22 is loaded in the air filter housing 20, one end of the air filter housing 20 is connected to the hydrophobic filter housing 10, the air filter 21 has a cylindrical structure, the air filter 21 has a rotating shaft 211 and a plurality of filter discs 212 rotatable around the rotating shaft 211, each filter disc 212 has a disc through hole on the top surface, and a detachable composite filter layer 213 is disposed in the disc through hole; and a piping mechanism 3 having an elongated compression pipe 31, an elongated intake pipe 32 and a pressure joint 33, wherein one end of the elongated compression pipe 31 is connected to one end of the air filter case 20 away from the drain mechanism 1, the other end of the elongated compression pipe 31 is connected to the elongated intake pipe 32, and the elongated intake pipe 32 and the elongated compression pipe 31 are connected by the pressure joint 33.

Further, the composite filter layer 213 is a composite filter screen with a mesh structure having a plurality of through holes.

Further, the composite filter layer 213 is made of a glass microfiber membrane, a cellulose acetate membrane, a nylon membrane, an aluminum oxide membrane, quartz filter paper, a polycarbonate membrane, or a polytetrafluoroethylene membrane.

Further, the cross-sectional shape of the composite filter layer 213 is a trefoil.

Further, an O-ring 4 is disposed between the air cleaner case 20 and the drain filter case 10.

Further, the pressure joint 33 is a hexagonal nut pressure joint.

The utility model also provides a gas detector 5, including: a body 50; at least one gas sensor disposed within the body 50 for detecting the gas eventually collected; a control module, disposed in the body 50, for controlling various operations of the gas detector; one end of the body 50 is connected to a sample filter head for preliminarily screening the gas to be measured before reaching the gas sensor.

Further, a built-in pump is disposed inside the body 50, and the built-in pump is connected to the long intake pipe 32.

Furthermore, the built-in pump is a flow-rate-adjustable pump, the flow rate ranges from 450 cc/min to 550cc/min, and the built-in pump further comprises a pressure sensor.

Further, a sensor chamber 501 is disposed at the bottom of the body 50, and the gas sensor is disposed in the sensor chamber 501.

The gas detector and the sample injection filter head thereof at least have the following beneficial effects:

the utility model discloses in, owing to used the appearance filter head that advances that can filter multiple impurity to make gas just by the primary screening filtration before getting into the sensor room by the sample, make gaseous detection appearance have more the pertinence to the gaseous detection of purpose, avoided impurity to the interference of testing result. The assembly design among all parts is orderly, and the drainage end, the filtering end, the pipeline and the sealing ring are compact and simple, and occupy small volume. The structure of the air cleaner 21, which is partly rotatable and detachable, allows the air cleaner 21 to be easily detached.

In addition, due to the fact that the structure of the filter screen carrying disc 212 is designed, the filter screen carrying disc 212 can conveniently replace a filter layer after rotating around the rotating shaft 211, when the sample feeding filter head is applied to the handheld gas detector, an operator can replace the structure of the filter layer according to specific application requirements on the site, and therefore the operator can conveniently and quickly filter gas.

Drawings

Fig. 1 is an exploded view and an integrated view of a sample injection filter head according to an embodiment of the present invention; the concrete constitution and the assembling mode of the sample injection filter head are explained;

FIG. 2 is a perspective view of the air cleaner 21 shown in FIG. 1 and a schematic view of the filter tray 212 being rotated out of the air cleaner 21; for illustrating the specific mechanism of the air cleaner 21, and how the screen carrier 212 is rotated about the rotation axis 211 and allows for easy replacement of the filter layers therein;

FIG. 3 is a perspective view of a gas detector according to a first preferred embodiment of the present invention;

FIG. 4 is a perspective view of a gas detector according to a second preferred embodiment of the present invention;

fig. 5 is a perspective view of a gas detector according to a third preferred embodiment of the present invention;

the following detailed description of the invention will be further described in conjunction with the above-identified drawings.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

Throughout the description of the present invention, it should be noted that, for the terms of orientation, there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicating the orientation and positional relationship as being based on the orientation or positional relationship shown in the drawings or commonly known to those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and fig. 2, fig. 1 is an exploded view and an integrated view of a sample injection filter head according to an embodiment of the present invention; the concrete structure and assembly of the sample filter head are explained. FIG. 2 is a perspective view of the air cleaner 21 shown in FIG. 1 and a schematic view of the filter tray 212 being rotated out of the air cleaner 21; for illustrating the specific mechanism of the air cleaner 21 and how the screen carrier 212 is rotated about the axis of rotation 211 and allows for easy replacement of the filter layers therein. The sample injection filter head in the embodiment is used for filtering gas entering the gas detector, and comprises a water drainage mechanism 1, an air filtering mechanism 2 and a pipeline mechanism 3.

The hydrophobic mechanism 1 mainly plays a role of hydrophobic, and has a hydrophobic filter housing 10 and a hydrophobic filter 11, and the hydrophobic filter 11 is arranged in the hydrophobic filter housing 10.

The air filter mechanism 2 is mainly used for filtering air to enter a sensor, the air filter mechanism 2 is provided with an air filter shell 20, an air filter 21 and a filter bowl 22, the air filter 21 is loaded in the filter bowl 22, the filter bowl 22 is loaded in the air filter shell 20, one end of the air filter shell 20 is connected to the hydrophobic filter shell 10, the air filter 21 is of a cylindrical structure, the air filter 21 is provided with a rotating shaft 211 and a plurality of filter screen carrying discs 212 capable of rotating around the rotating shaft 211, each filter screen carrying disc 212 is provided with a carrying disc through hole on the top surface, and a detachable composite filter layer 213 is arranged in the carrying disc through hole. The composite filter layer 213 may be a composite filter screen with a mesh structure having a plurality of through holes. The composite filter layer 213 can also be made of a glass microfiber membrane, a cellulose acetate membrane, a nylon membrane, an aluminum oxide membrane, quartz filter paper, a polycarbonate membrane or a polytetrafluoroethylene membrane, or optionally, the cross section of the composite filter layer 213 is made into a trilobal shape, which also has better impurity filtering and adsorbing effects, and the composite filter layer can refer to the relevant research papers on the trilobal cross section wave absorbing and adsorbing properties of Mr. Huang Xiao Zhong nan university physical science and technology college, and also refer to the relevant efficacy of the trilobal acetate fiber cross section, which is an existing research result.

Pipeline mechanism 3 mainly used will pass through the whole gas transmission of advancing the appearance filter head to pressure sensor in, this pipeline mechanism 3 has a long compression pipe 31, a long intake pipe 32 and a pressure joint 33, the one end of long compression pipe 31 is connected air cleaner shell 20 is kept away from the one end of hydrophobic mechanism 1, the other end of long compression pipe 31 is connected long intake pipe 32, long intake pipe 32 with pass through between the long compression pipe 31 pressure joint 33 connects. The pressure joint 33 may be a hexagon nut pressure joint, or a pressure gauge joint, or a welded type, an expanded pipe, a three-way joint, a pressure gauge straight joint, a ferrule type pipe joint, or the like.

In addition, the sampling filter head may preferably include a sealing ring 4, and the sealing ring 4 is disposed between the air filter housing 20 and the hydrophobic filter housing 10. The sealing ring 4 may be an O-ring.

The use of the sample introduction filter head enables gas to be preliminarily screened and filtered before being sampled and entering the sensor chamber, so that the gas detector is more pertinent to detection of target gas, and the interference of impurities to detection results is avoided.

Because the assembly design among each part is orderly, the drain end, the filtering end, the pipeline and the sealing ring are compact and simple, and the occupied volume is small. Due to the rotatable and detachable structure of the air filter 21, the air filter 21 has good filtering effect (operators can determine which more specific membrane is replaced on the filter screen carrying disc 212 at any time according to the field requirements), and is easy to detach.

Referring to fig. 3, fig. 3 is a perspective view of a gas detector according to a first preferred embodiment of the present invention; the gas detector 5 in this embodiment includes a body 50, a gas sensor, a sensor chamber 501, a control module, and a sample filter.

The body 50 is used for loading objects such as a gas sensor (also referred to as a sensor for short). The body 50 is provided with a built-in pump inside, and the built-in pump is connected to the long air inlet pipe 32 of the sample filter head. The sampling can be carried out by a free diffusion type or manual suction type sampling kit or a built-in electric sampling pump (in a pumping mode), and in any mode, the sampled gas must reach a sensor of the instrument, so that the aim of accurate measurement can be fulfilled. The sensor is located at the bottom of the instrument. There are three separate sensor ports that allow gas to reach each individual sensor. In the diffusion mode, the atmosphere being measured enters the sensor by free diffusion through a vent in the bottom of the meter. The general air flow is sufficient to carry the sample gas into the sensor. The sensor reacts quickly to changes in the concentration of the gas being measured. The diffusion type operation only monitors the atmospheric environment around the detector. Remote sampling may also be performed using a manual aspiration sampling kit or an optional built-in electric sampling pump. In remote sampling, a gas sample can be drawn into the sensor chamber through a sampling assembly, which has the aforementioned sample filter head disposed therein, and a length of tubing. The remote sampling operation monitors only the atmospheric environment at the end of the sampling probe.

The gas sensor is disposed in the body 50 to detect the finally collected gas.

The control module is disposed in the body 50 and configured to control various operations of the gas detector. The control module may be a microprocessor disposed inside the body 50. The sensors are preferably electrochemical carbon monoxide and hydrogen sulfide sensors, which are designed to minimize the adverse effects of common interfering gases on the measurement. These sensors provide accurate, reliable readings for toxic gases frequently encountered at confined space entrances and provide other industrial applications.

The sample filter head (not shown) is connected to one end of the body 50, and is used for preliminarily screening the gas to be detected before reaching the gas sensor.

The built-in pump is adjustable velocity of flow formula pump, and the velocity of flow scope can also include a pressure sensor in the built-in pump, and it is used for detecting gas pressure for gas pressure is not higher than a predetermined threshold value, is unlikely to destroy the utility model provides a filter screen structure of advance kind filter head.

Referring to fig. 4, fig. 4 is a perspective view of a gas detector according to a second preferred embodiment of the present invention;

the gas detector 5 can be a 3-channel sensor type gas detector, and a plurality of sensors are arranged to connect different 3 sample injection filter heads and detect various gases simultaneously. The person skilled in the art can sample by adopting a free diffusion type or a pumping type according to different use scenes, and the sampled gas should finally reach a sensor of the instrument in any way so as to achieve the purpose of accurate measurement. This is the case after the provision of an electrically powered sampling pump for the customer's purchase, for the need for continuous "hands-free" remote monitoring, the pressure sensor incorporated in the pump being able to detect the presence of a blocked air flow caused by the inhalation of water or other obstructions into the device and communicate it to the microprocessor, which immediately controls the shut down of the sampling pump to protect the sensors, pump and other components of the gas detector from damage.

Preferably, a sensor chamber 501 may be provided at the bottom of the body 50, and the gas sensor is disposed in the sensor chamber 501. Such a sensor chamber 501 of the gas detector 5 carries a configuration of gas sensors so that the gas sensors in the gas detector 5 can be replaced of any kind, and thus the gas detector 5 can be configured to simultaneously measure oxygen, carbon monoxide, hydrogen sulfide, and combustible gases and vapors. All gas sensors 5 can be replaced in the field. A built-in sample pump or the like equipped with a dedicated sensor chamber 501 and directly connected to the channel, which eliminates a complicated reconfiguration procedure.

Referring to fig. 5, fig. 5 is a perspective view of a gas detector according to a third preferred embodiment of the present invention; at this time, the sensor chamber 501 for the gas sensor is disposed on the top surface of the body 50 of the whole gas detector, and is closed by a rectangular sensor chamber cover, and after the sensor chamber cover is opened, the sample injection filter head can be inserted into a corresponding connection port leading to the sensor, so as to implement installation of the sample injection filter head.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model.

The reference numerals and drawings in the present invention are for the purpose of the present invention to facilitate understanding of the present invention during and after the application process, and when reading by those skilled in the art, the present invention does not constitute a limitation to the position and connection of the components.

The protection scope of the present invention is subject to the claims.

Those not described in detail in this specification are within the skill of the art.

Claims

1. The utility model provides a kind and advances a kind filter head for filter the gas that gets into gas detection appearance, its characterized in that, including:

a hydrophobic mechanism (1) comprising a hydrophobic filter housing (10) and a hydrophobic filter (11) disposed within the hydrophobic filter housing (10);

an air filter mechanism (2) comprising an air filter housing (20), an air filter (21) and a filter bowl (22), wherein the air filter (21) is loaded in the filter bowl (22), the filter bowl (22) is loaded in the air filter housing (20), one end of the air filter housing (20) is connected to the water-repellent filter housing (10), the air filter (21) is of a cylindrical structure, the air filter (21) is provided with a rotating shaft (211) and a plurality of filter screen carrying discs (212) capable of rotating around the rotating shaft (211), the top surface of each filter screen carrying disc (212) is provided with a carrying disc through hole, and a detachable compound filter layer (213) is arranged in the carrying disc through hole; and

a pipeline mechanism (3) comprises a long compression pipe (31), a long air inlet pipe (32) and a pressure joint (33), one end of the long compression pipe (31) is connected with one end, far away from the hydrophobic mechanism (1), of the air filter shell (20), the other end of the long compression pipe (31) is connected with the long air inlet pipe (32), and the long air inlet pipe (32) is connected with the long compression pipe (31) through the pressure joint (33).

2. The sample introduction filter head according to claim 1, wherein the composite filter layer (213) is a composite filter screen with a mesh structure having a plurality of through holes.

3. The sample introduction filter head according to claim 1 or 2, wherein the composite filter layer (213) is made of a glass microfiber membrane, a cellulose acetate membrane, a nylon membrane, an aluminum oxide membrane, quartz filter paper, a polycarbonate membrane, or a polytetrafluoroethylene membrane.

4. The sample introduction filter head as claimed in claim 3, wherein the cross-sectional shape of the composite filter layer (213) is a trefoil.

5. The sample introduction filter head according to claim 1, wherein an O-ring seal (4) is provided between the air filter housing (20) and the hydrophobic filter housing (10).

6. The sample filter head as claimed in claim 1, wherein the pressure joint (33) is a hex nut pressure joint.

7. A gas detector (5) comprising:

a body (50);

at least one gas sensor, arranged in said body (50), for detecting the gases eventually collected;

the control module is arranged in the machine body (50) and used for controlling various operations of the gas detector;

characterized in that one end of the machine body (50) is connected with a sample filter head according to any one of claims 1 to 6.

8. Gas detector according to claim 7, characterized in that the body (50) is provided with a built-in pump inside, which is connected to the long inlet tube (32).

9. The gas detector according to claim 8, wherein the internal pump is an adjustable flow rate pump, wherein the flow rate is in a range of 450-550 cc/min, and wherein the internal pump further comprises a pressure sensor.

10. The gas detector according to claim 7, wherein a sensor chamber (501) is provided at the bottom of the body (50), and the gas sensor is disposed in the sensor chamber (501).