Filtering device and gas detector

Abstract

The utility model discloses a filtering device and a gas detector. The filtering device comprises a first shell, a second shell, a filtering layer, a hydrophobic layer and a water collecting assembly. Wherein the first shell comprises an air inlet; the second shell comprises an air outlet, and the second shell and the first shell are connected to form a containing cavity; the filtering layer is arranged in the accommodating cavity, is close to the air inlet and is used for filtering air entering through the air inlet; the hydrophobic layer is arranged in the accommodating cavity, is close to the gas outlet and is used for filtering gas discharged from the gas outlet; the water collecting assembly is arranged in the containing cavity, located between the filtering layer and the hydrophobic layer and used for collecting water vapor and / or liquid drops in the containing cavity. The filtering device and the gas detector provided by the embodiment of the utility model have good dustproof and dehumidifying effects, can prevent impurities such as dust and steam from influencing the sensitivity and durability of the gas detector, and have the advantages of rainwater splashing prevention, easiness in expansion, modification, installation and replacement, simple production, assembly and maintenance process, firm, durable and reliable structure and the like.

Description

Technical Field

[0001] The present application relates to the technical field of gas detection equipment, and in particular to a filtering device and a gas detector. Background Art

[0002] With increasing attention to labor protection, ecological protection, and health and safety, gas detectors have become widely used in critical applications such as chemical defense, mining, smelting, chemical engineering, water supply and drainage, environmental monitoring, hazard detection, and security management. However, in dusty and steamy areas such as mines, bathhouses, warehouses, low-lying areas, and food processing plants, impurities like dust and steam can easily adhere to the gas detector probes, causing false water vapor alarms, probe desensitization, and even damage.

[0003] Existing gas detectors also have problems such as poor dust and moisture prevention, insufficient product durability, the need for regular filter replacement, and high assembly and maintenance costs. Utility Model Content

[0004] In view of this, the present application proposes a filtering device and a gas detector, which not only can prevent dust and moisture, prevent dust, steam and other impurities from affecting the durability and accuracy of the gas detector, but also has the advantages of preventing rain splashing, easy expansion, modification, installation and replacement, simple production, assembly and maintenance process, and a sturdy, durable and reliable structure.

[0005] The present application proposes a filtering device, which includes:

[0006] a first housing, the first housing including an air inlet;

[0007] a second shell, the second shell including an air outlet, the second shell being connected to the first shell to form a receiving cavity;

[0008] a filter layer, the filter layer being disposed inside the accommodating cavity and close to the air inlet, and being used for filtering the gas entering through the air inlet;

[0009] a hydrophobic layer, the hydrophobic layer being disposed inside the accommodating cavity and close to the gas outlet, and being used for filtering the gas discharged through the gas outlet;

[0010] A water collecting component is arranged inside the accommodating cavity and located between the filter layer and the hydrophobic layer, and is used to collect water vapor and / or droplets inside the accommodating cavity.

[0011] In some embodiments, the filter layer includes a first filter layer and a second filter layer, wherein a surface of the first filter layer close to the air inlet is hydrophobic, and a surface of the first filter layer away from the air inlet is hydrophilic.

[0012] In some embodiments, the filter layer further includes a third filter layer, wherein a surface of the third filter layer close to the air inlet is hydrophobic, and a surface of the third filter layer away from the air inlet is hydrophilic.

[0013] In some embodiments, the material of the first filter layer and the third filter layer includes one or more of cotton, polyester, polypropylene, nylon, polyester filter cloth and nylon filter cloth; and / or,

[0014] The second filter layer includes one or more of high-pressure sponge, sponge, non-woven fabric, cotton, synthetic fiber and activated carbon.

[0015] In some embodiments, the first filter layer, the second filter layer, and the third filter layer of the filter layer are sequentially arranged along a direction from the air inlet to the air outlet.

[0016] In some embodiments, the first shell includes a protrusion, and the air inlet is opened on the protrusion.

[0017] In some embodiments, the hydrophobic layer includes a mesh structure, and a surface of the mesh structure is hydrophobic.

[0018] In some embodiments, the water collection assembly includes a water-absorbing material, a mesh structure, and a fixing portion, the mesh structure is used to place the water-absorbing material, and the fixing portion is connected to the first shell or the second shell.

[0019] In some embodiments, the water-absorbing material comprises one or more of silica gel, water-absorbing resin, calcium chloride and calcium oxide; and / or,

[0020] The outline of the mesh structure includes a cone, a hemisphere or a square.

[0021] The present application also provides a gas detector, which includes the filtering device described in any embodiment of the present application.

[0022] The filter device and gas detector proposed in this application realize multi-stage filtration of the air through the design of the filter layer, water collection component and hydrophobic net, play a good role in dust prevention and dehumidification, ensure the normal operation of the gas detector, and reduce the problem of false alarms of water vapor. In addition, through the design of the filter layer, water collection component and hydrophobic net, the hydrophilicity and hydrophobicity of the material surface are utilized, and the gravity exerted on the droplets themselves is used to enable the internal accumulated liquid to be discharged smoothly, thereby reducing the frequency of filter element replacement and improving the accuracy, durability and reliability of the gas detector. The filter device also has the advantages of preventing rain splashing, easy expansion, modification, installation and replacement, simple production, assembly and maintenance process, and a strong, durable and reliable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained from these drawings without any creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the filtering device proposed in this application;

[0025] Figure 2 An exploded schematic diagram of the filtration device proposed in this application;

[0026] Figure 3 A schematic cross-sectional view of the filtering device proposed in this application;

[0027] Figure 4 for Figure 3 The structure shown is a schematic cross-sectional view along the AA direction.

[0028] Description of reference numerals:

[0029] 100. Filter device; 10. First shell; 11. Air inlet; 20. Second shell; 21. Air outlet; 22. Accommodating chamber; 30. Filter layer; 31. First filter layer; 32. Second filter layer; 33. Third filter layer; 40. Hydrophobic layer; 50. Water collection component; 51. Mesh structure; 52. Fixing portion; 311. First surface; 312. Second surface. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] It should be understood that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0032] It should also be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element through an intervening element.

[0033] The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. For example, the terms "first," "second," and so on are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, the term "first" or "second" may explicitly or implicitly include at least one of the features.

[0034] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0035] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , an embodiment of the present application proposes a filtering device 100, comprising a first shell 10, a second shell 20, a filter layer 30, a hydrophobic layer 40 and a water collecting assembly 50. The first shell 10 includes an air inlet 11, the second shell 20 includes an air outlet 21, and the second shell 20 is connected to the first shell 10 to form a accommodating cavity 22. The filter layer 30 is arranged inside the accommodating cavity 22 and close to the air inlet 11, and is used to filter the gas entering through the air inlet 11. The hydrophobic layer 40 is arranged inside the accommodating cavity 22 and close to the air outlet 21, and is used to filter the gas discharged through the air outlet 21. The water collecting assembly 50 is arranged inside the accommodating cavity 22 and is located between the filter layer 30 and the hydrophobic layer 40, and is used to collect water vapor and / or droplets inside the accommodating cavity 22.

[0036] Further, such as Figure 1 As shown, the first shell 10 is connected to the second shell 20. Specifically, the connection method between the first shell 10 and the second shell 20 can include one or more of welding, bonding, snap-fitting, interference fit and threaded connection.

[0037] The first housing 10 may be made of non-metallic materials such as acrylic or resin, or metallic materials such as stainless steel. The second housing 20 may be made of non-metallic materials such as acrylic or resin, or metallic materials such as stainless steel.

[0038] Exemplarily, the first shell 10 is made of acrylic material, and the second shell 20 is made of stainless steel. The first shell 10 and the second shell 20 are connected by threads to form an accommodating cavity 22 .

[0039] In some embodiments, as Figure 2 and Figure 3 As shown, the first housing 10 may include a protrusion 12 , and the air inlet 11 is opened on the protrusion 12 .

[0040] It should be noted that the filter device 100 can filter the gas entering through the air inlet 11 through the filter layer 30, reducing impurities such as dust, dirt, and water vapor entering the accommodating cavity 22, thereby playing a role in dust prevention and dehumidification, and ensuring the reliability and sensitivity of the gas detector.

[0041] For example, the filter layer 30 can be fixed in the accommodating cavity 22 by one or more of snapping, threading, snapping, pressing, and bonding.

[0042] In some embodiments, the filter layer 30 may include a first filter layer 31 , wherein a surface of the first filter layer 31 close to the air inlet 11 is hydrophobic, and a surface of the first filter layer 31 away from the air inlet 11 is hydrophilic.

[0043] like Figure 2 As shown, the first filter layer 31 has a hydrophobic first surface 311 and a hydrophilic second surface 312 . The first surface 311 is the side of the first filter layer 31 close to the air inlet 11 , and the second surface 312 is the side of the first filter layer 31 away from the air inlet 11 .

[0044] In other embodiments, the filter layer 30 may include a first filter layer 31 and a second filter layer 32, wherein a surface of the first filter layer 31 close to the air inlet 11 is hydrophobic, and a surface of the first filter layer 31 away from the air inlet 11 is hydrophilic.

[0045] The material of the first filter layer 31 may include one or more of cotton, polyester, polypropylene, nylon, polyester filter cloth and nylon filter cloth, and the material of the second filter layer 32 may include one or more of high-pressure sponge, sponge, non-woven fabric, cotton, synthetic fiber and activated carbon.

[0046] For example, the first filter layer 31 and the second filter layer 32 may be fixed in the accommodating cavity 22 by one or more of snapping, threading, snapping, pressing, and bonding.

[0047] The first filter layer 31 and the second filter layer 32 may be arranged along the direction from the air inlet 11 to the air outlet 21 , or may be arranged along the direction from the air outlet 21 to the air inlet 11 .

[0048] By arranging the first filter layer 31 and the second filter layer 32 along the direction from the air inlet 11 to the air outlet 21 , the hydrophobicity of the surface of the first filter layer 31 can be utilized to prevent rainwater from splashing into the accommodating cavity 22 .

[0049] By arranging the first filter layer 31 and the second filter layer 32 along the direction from the air outlet 21 to the air inlet 11, the first filter layer 31 with a harder material can be used to fix the second filter layer 32 with a softer material in the accommodating cavity 22, thereby preventing shaking or bumping during the production, transportation, and use of the product from affecting the filtering effect of the second filter layer 32.

[0050] In some embodiments, as Figure 2 and Figure 4 As shown, the filter layer 30 may further include a third filter layer 33 , wherein a surface of the third filter layer 33 close to the air inlet 11 may be hydrophobic, and a surface of the third filter layer 33 away from the air inlet 11 may be hydrophilic.

[0051] The material of the first filter layer 31 and the third filter layer 33 may include one or more artificial fiber materials such as cotton, polyester, polypropylene, nylon, polyester filter cloth and nylon filter cloth.

[0052] For example, the first filter layer 31 and the third filter layer 33 may both be cotton.

[0053] For example, the first filter layer 31 and the third filter layer 33 may both include cotton and polyester.

[0054] For example, the first filter layer 31 may include cotton, and the third filter layer 33 may include polyester.

[0055] For example, the first filter layer 31 may include cotton and polyester, and the third filter layer 33 may include polyester filter cloth and nylon filter cloth.

[0056] Furthermore, the second filter layer 32 may include one or more of high-pressure sponge, sponge, non-woven fabric, cotton, synthetic fiber, and activated carbon.

[0057] By using one or more of high-pressure sponge, sponge, non-woven fabric, cotton, synthetic fiber and activated carbon as the material of the second filter layer 32, dust and particles can be effectively blocked.

[0058] It should be noted that the first filter layer 31 , the second filter layer 32 and / or the third filter layer 33 may be treated by physical methods, chemical methods or surface modification techniques, so that the surface of the material has hydrophilicity or hydrophobicity.

[0059] Among them, physical methods may include plasma treatment, ultraviolet irradiation or laser treatment, etc., which improve the hydrophilicity of the material surface by introducing or generating hydrophilic functional groups on the surface of the material.

[0060] Among them, chemical methods may include chemical modification, graft copolymerization or surface coating, etc., which improve the surface hydrophilicity by introducing or generating hydrophilic functional groups on the surface of the material.

[0061] Among them, surface modification technologies may include sol-gel method, self-assembled monolayer, layer-by-layer self-assembly, nanomaterial composite, surfactant treatment, vapor deposition, electrochemical treatment or biological modification, etc., which enhance the hydrophilicity of the material surface by introducing or generating hydrophilic functional groups on the material surface, or forming a hydrophilic film.

[0062] For example, the first filter layer 31, the second filter layer 32, and / or the third filter layer 33 can be made of artificial fiber materials. A polystyrene spinning solution can be deposited on one side of the first filter layer 31, the second filter layer 32, and / or the third filter layer 33 using electrospinning technology. After reaching a predetermined thickness, a polyvinyl alcohol spinning solution is then applied to the other side of the first filter layer 31, the second filter layer 32, and / or the third filter layer 33.

[0063] Furthermore, a hydrophobic agent may be sprayed on the hydrophobic side of the first filter layer 31 , the second filter layer 32 and / or the third filter layer 33 , thereby enhancing the hydrophobic effect.

[0064] The hydrophobic agent may include organosilicon hydrophobic agents such as aminosilane, alkylsilane, and siloxane, and may also include fluorine-based hydrophobic agents such as fluoropolymers and fluorosilicone compounds.

[0065] In some embodiments, the first filter layer 31 , the second filter layer 32 and the third filter layer 33 of the filter layer 30 are sequentially arranged along the direction from the air inlet 11 to the air outlet 21 .

[0066] For example, Figure 2 As shown, the first filter layer 31 , the second filter layer 32 and the third filter layer 33 of the filter layer 30 are sequentially arranged along the direction from the air inlet 11 to the air outlet 21 , and the filter layer 30 is fixed in the accommodating cavity 22 by buckles.

[0067] It should be noted that the material of the second filter layer 32 can be softer than the material of the first filter layer 31 and the third filter layer 33. Therefore, the first filter layer 31 and the third filter layer 33 with harder materials can be used to fix the second filter layer 32 with softer material in the accommodating cavity 22 to prevent shaking or bumping during the production, transportation and use of the product from affecting the filtering effect of the filter layer 30, making the product structure more sturdy, durable and reliable.

[0068] It should be noted that, in other embodiments, if the filter layer 30 only includes the first filter layer 31, in order to effectively block dust and particles, one or more dust-filtering materials such as high-pressure sponge, sponge, non-woven fabric, cotton, synthetic fiber and activated carbon can be used as the material of the first filter layer 31, and then the first filter layer 31 is treated by physical methods, chemical methods or surface modification technology to make the surface of the material hydrophilic or hydrophobic, which not only has the effect of dehumidification and drainage of accumulated water, but also has the effect of dust prevention.

[0069] Furthermore, the filter layer 30 can be fixed in the accommodating cavity 22 by means of an elastic annular hollow buckle.

[0070] By utilizing the elasticity of the annular hollow clip, users can use clip pliers to install, modify and disassemble the first filter layer 31, the second filter layer 32 and / or the third filter layer 33, thereby improving the convenience of product expansion, modification, installation and replacement, and simplifying the production, assembly and maintenance process.

[0071] In some embodiments, the first housing 10 includes a protrusion 12 , and the air inlet 11 is opened on the protrusion 12 .

[0072] For example, Figure 1 As shown, the first housing 10 includes a protrusion 12 , and the air inlet 11 is opened on the protrusion 12 . The protrusion 12 can provide additional strength and rigidity to the circumference of the air inlet 11 and / or serve as a reference surface for connecting other components.

[0073] For example, the user can install the filter device 100 at the air inlet opening of the pump-in gas detector, and use the raised portion 12 of the filter device 100 to connect the air inlet pipe, thereby safely and reliably carrying out gas detection operations in areas that are difficult or inappropriate to enter, such as confined spaces, underground, and pipelines.

[0074] In some embodiments, the hydrophobic layer 40 includes a mesh structure, and the surface of the mesh structure is hydrophobic.

[0075] For example, the mesh structure of the hydrophobic layer 40 can be sprayed with organosilicon hydrophobic agents such as aminosilane, alkylsilane, siloxane, or fluorine-based hydrophobic agents such as fluoropolymers and fluorosilicone compounds, thereby improving the hydrophobic effect and preventing the liquid in the accommodating cavity 22 from entering the gas detector.

[0076] For example, the hydrophobic layer 40 may be a hydrophobically modified metal mesh with a mesh size between 100 mesh and 500 mesh.

[0077] For example, the hydrophobic layer 40 may be made of a stainless steel mesh, and the hydrophobic material may be loaded onto the stainless steel mesh base of the hydrophobic layer 40 using a coupling agent to improve the hydrophobicity.

[0078] Among them, the hydrophobic material may include The hydrophobic nano-SiO2 particles prepared by the method, the coupling agent may include a silane coupling agent.

[0079] Furthermore, the method of loading the hydrophobic substance onto the stainless steel mesh substrate may also include a soaking method.

[0080] It should be noted that the method of improving the hydrophobicity of the surface of the mesh structure of the hydrophobic layer 40 may also include one or more of a silane coupling agent modification method, an organic silicon coating method, and a chemical vapor deposition method.

[0081] In some embodiments, the water collecting assembly 50 may include a water absorbing material, a mesh structure 51 and a fixing portion 52 . The mesh structure 51 may be used to place the water absorbing material, and the fixing portion 52 may be connected to the first shell 10 or the second shell 20 .

[0082] For example, the fixing portion 52 may be connected to the first shell 10 or the second shell 20 by one or more of screws, threads, welding, placement, and snap-fitting.

[0083] For example, the water-absorbing material may be porous silica gel, and the outline of the mesh structure 51 may be conical.

[0084] For example, the fixing portion 52 and the hydrophobic layer 40 may be placed in the first shell 10 and fixed inside the accommodating cavity 22 through the threaded connection between the first shell 10 and the second shell 20 .

[0085] In some embodiments, the water-absorbing material may further include one or more of silica gel, water-absorbing resin, calcium chloride and calcium oxide; and / or,

[0086] The outline of the mesh structure 51 may include a cone, a hemispherical shape or a square shape. Figure 2 and Figure 4 As shown, the mesh structure 51 has a tapered profile.

[0087] For example, the mesh size of the mesh structure 51 may be between 100 mesh and 500 mesh.

[0088] The conical, hemispherical or square profile of the mesh structure 51 can expand the contact area between the water-absorbing material and the air in the accommodating cavity 22, thereby capturing more water vapor and improving the dehumidification effect.

[0089] Since the water-absorbing material is saturated, the conical mesh structure 51 has a sharper top, which is conducive to the condensation of water vapor and water droplets and their dripping into the filter layer 30. Then, through the principle of hydrophilicity and hydrophobicity, the liquid is smoothly discharged, preventing water accumulation in the water collection component 50 and the accommodating cavity 22, further improving the reliability and durability of the product in an environment with more steam, avoiding frequent replacement of filter elements, and reducing maintenance costs.

[0090] An embodiment of the present application provides a gas detector, which may include a filter device 100 as in any embodiment of the present application.

[0091] For example, the air outlet 21 of the filter device 100 can be connected to the air inlet opening of the pump-in gas detector through a bayonet, thereby achieving the effect of dust prevention and moisture removal.

[0092] Furthermore, the air outlet 21 of the filter device 100 can also be connected to the air inlet opening of a toxic gas detector, a gas composition detector or a combustible gas detector through threads, thereby achieving the effects of dust prevention and dehumidification and protecting the gas detection probe.

[0093] Those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples without mutual contradiction.

[0094] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A filtering device, characterized in that: include: a first housing, the first housing including an air inlet; a second shell, the second shell including an air outlet, the second shell being connected to the first shell to form a receiving cavity; a filter layer, the filter layer being disposed inside the accommodating cavity and close to the air inlet, and being used for filtering the gas entering through the air inlet; a hydrophobic layer, the hydrophobic layer being disposed inside the accommodating cavity and close to the gas outlet, and being used for filtering the gas discharged through the gas outlet; A water collecting component is arranged inside the accommodating cavity and located between the filter layer and the hydrophobic layer, and is used to collect water vapor and / or droplets inside the accommodating cavity.

2. The filtering device according to claim 1, wherein The filter layer includes a first filter layer and a second filter layer. A surface of the first filter layer close to the air inlet is hydrophobic, and a surface of the first filter layer away from the air inlet is hydrophilic.

3. The filtering device according to claim 2, characterized in that The filter layer further includes a third filter layer, wherein a surface of the third filter layer close to the air inlet is hydrophobic, and a surface of the third filter layer away from the air inlet is hydrophilic.

4. The filtering device according to claim 3, wherein The material of the first filter layer and the third filter layer includes one or more of cotton, polyester, polypropylene, nylon, polyester filter cloth and nylon filter cloth; and / or, The second filter layer includes one or more of high-pressure sponge, sponge, non-woven fabric, cotton, synthetic fiber and activated carbon.

5. The filtering device according to claim 3 or 4, characterized in that The first filter layer, the second filter layer and the third filter layer of the filter layer are arranged in sequence along the direction from the air inlet to the air outlet.

6. The filtering device according to any one of claims 1 to 4, characterized in that: The first shell includes a protrusion, and the air inlet is opened on the protrusion.

7. The filtering device according to any one of claims 1 to 4, characterized in that: The hydrophobic layer includes a mesh structure, and the surface of the mesh structure is hydrophobic.

8. The filtering device according to any one of claims 1 to 4, characterized in that: The water collecting assembly includes a water absorbing material, a mesh structure and a fixing portion. The mesh structure is used to place the water absorbing material. The fixing portion is connected to the first shell or the second shell.

9. The filtering device according to claim 8, wherein The water-absorbing material includes one or more of silica gel, water-absorbing resin, calcium chloride and calcium oxide; and / or, The outline of the mesh structure includes a cone, a hemisphere or a square.

10. A gas detector, characterized in that: The filter comprises the filter device according to any one of claims 1 to 9.

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