Mud cover for gas detector

Abstract

The utility model discloses a mud cover for a gas detector, which comprises a metal outer cover, the metal outer cover is provided with an inner cavity penetrating through the metal outer cover along the height direction, the metal outer cover is provided with a plurality of air inlets communicated with the inner cavity, and the mud cover for the gas detector further comprises a mud cover support and a waterproof dense permeable membrane which are arranged in the inner cavity. A plurality of air passing openings are formed in the mud blocking support and form a zigzag air flow channel in an inner cavity of the metal outer cover; the waterproof dense permeable membrane is arranged on the top of the mud blocking support and covers the air passing opening in the top of the mud blocking support. According to the mud cover disclosed by the utility model, the zigzag airflow channel is formed in the metal outer cover through the mud cover bracket, and when gas is detected, the zigzag airflow channel can reduce the kinetic energy of mud, water vapor and the like entering the metal outer cover, so that the mud and the water vapor cannot enter a gas detector; and meanwhile, the top of the airflow channel is further provided with a waterproof dense permeable membrane, so that the mud blocking and water blocking effects of the mud blocking cover are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of protective equipment, in particular to a mud shield for a gas detector. Background Art

[0002] A gas detector is an instrument that detects gas concentration. It is widely used in various environments to detect gas leaks. The gas sensor, circuit board, etc. of the gas detector are sensitive components and have high requirements for the temperature and humidity of the use environment.

[0003] When a gas detector performs gas detection in an environment with mud, water vapor, etc., the mud, water vapor, etc. will enter the gas detector along with the gas, and then damage sensitive components such as gas sensors and circuit boards. Therefore, a mud shield is needed that can prevent mud, water vapor, etc. from entering the gas detector while allowing gas to enter the gas detector. Utility Model Content

[0004] In order to solve at least one technical problem in the prior art, the utility model provides a mud shield for a gas detector.

[0005] In order to achieve the above-mentioned utility model object, the technical solution adopted by the utility model is: a mud shield for a gas detector, comprising a metal outer cover, the metal outer cover having an inner cavity penetrating the metal outer cover in the height direction, the metal outer cover is provided with a plurality of air inlets connected with the inner cavity, the mud shield for the gas detector also comprises a mud shield bracket and a waterproof and permeable membrane arranged in the inner cavity, the mud shield bracket is provided with a plurality of air ports, and the plurality of air ports form a tortuous gas flow channel in the inner cavity of the metal outer cover;

[0006] The waterproof and airtight membrane is arranged on the top of the mud guard bracket and covers the air outlet located on the top of the mud guard bracket.

[0007] In some embodiments, the metal cover is cylindrical, and the plurality of air inlets are distributed along the circumference of the metal cover;

[0008] The plurality of air inlets are arranged at the middle and upper part of the metal outer cover.

[0009] In some embodiments, the mud guard bracket includes a first mud guard portion, and the first mud guard portion is arranged above the air inlet;

[0010] The first mudguard portion includes a first mudguard and a second mudguard which are arranged opposite to each other in an upper and lower direction, and a middle mudguard member which is vertically connected between the first mudguard and the second mudguard. The shapes of the first mudguard and the second mudguard are adapted to the shape of the inner cavity. The first mudguard, the second mudguard and the middle mudguard member are all provided with the air outlet.

[0011] In some embodiments, the air outlet includes a first air outlet opened on the first fender, a second air outlet opened on the middle fender, and a third air outlet opened on the second fender;

[0012] The projections of the first air outlet and the third air outlet in the height direction do not overlap, and the first air outlet and the third air outlet are connected to each other through the second air outlet;

[0013] The first air port is communicated with the air inlet, the third air port is communicated with the gas inlet of the gas detector, and the waterproof and permeable membrane covers the third air port.

[0014] In some embodiments, the middle mud guard is a polygonal or circular structure with a middle cavity formed by connecting a plurality of connecting plates end to end in sequence, and a distance is provided between the outer side of the middle mud guard and the inner wall of the metal outer cover;

[0015] The second air port is communicated with the middle cavity, the third air port is located above the middle cavity, and the first air port is located outside the middle cavity.

[0016] In some embodiments, the mud guard bracket also includes a second mud guard portion, which is fixed below the first mud guard portion, and the second mud guard portion divides the inner cavity of the metal outer cover into a first inner cavity and a second inner cavity, the first inner cavity is located above the second mud guard portion, and the second inner cavity is located below the second mud guard portion, and the air inlet is opened on the cavity wall of the first inner cavity.

[0017] In some embodiments, the second mud guard portion has a mud guard cavity with an opening facing downward, and the inner side wall and the outer side wall of the mud guard cavity are both inclined surfaces;

[0018] The second mud guard portion is provided with a through hole for connecting the first inner cavity with the second inner cavity, the through hole is provided on a side wall of the second mud guard portion, and a center line of the through hole is located below a center line of the air inlet.

[0019] In some embodiments, the top of the mud guard cavity is arc-shaped, and the cross-section of the second mud guard portion is arched with the opening facing upward.

[0020] In certain embodiments, the mud shield for a gas detector further includes a clamping ring, which is disposed in the inner cavity and at the lower end of the mud shield bracket.

[0021] In some embodiments, a mounting portion is provided at the upper end of the metal housing, and the outer diameter of the mounting portion is adapted to the inner diameter of the gas inlet of the gas detector;

[0022] The outer diameter of the mounting portion matches the inner diameter of the lower end of the metal outer cover.

[0023] The beneficial effects of the utility model are:

[0024] 1. The mud guard of the utility model forms a tortuous airflow channel in the metal outer cover through the mud guard bracket. When the gas detector is detecting, the tortuous airflow channel will reduce the kinetic energy of the mud, water vapor, etc. entering the metal outer cover, so that the mud and water vapor cannot enter the gas detector; at the same time, a waterproof and permeable film is also provided on the top of the airflow channel, which further improves the mud and water blocking effect of the mud guard;

[0025] 2. The mud guard bracket of the mud guard cover is also provided with an inclined slope. When the gas enters the inner cavity from the air inlets around the metal outer cover, the inclined outer side wall of the second mud guard portion can block most of the water vapor and mud from directly entering the first air inlet;

[0026] 3. The inclined outer wall of the second mud guard also helps the mud entering the inner cavity to slide down the inclined surface and be discharged from the through hole, and the inclined outer wall of the second mud guard also helps the water droplets condensed by water vapor to slide down the inclined surface and be discharged from the through hole;

[0027] 4. The mud guard bracket of the mud guard cover also has an arc-shaped top, which helps to weaken the upward impact force of mud and water vapor and reduce the kinetic energy of the upward water vapor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a connection diagram of multiple mud guards for gas detectors of the utility model for use in combination;

[0029] Figure 2 It is a cross-sectional view of the mud guard bracket of the utility model;

[0030] Figure 3 for Figure 1 Sectional view along AA direction. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0034] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0035] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] Reference Figures 1 to 3 The utility model provides a mud shield for a gas detector, comprising a metal outer cover 1, a mud shield bracket 2 and a waterproof and airtight membrane 3. The metal outer cover 1 has an inner cavity penetrating the metal outer cover 1 in the height direction, the metal outer cover 1 is provided with a plurality of air inlets 10 communicating with the inner cavity, the mud shield bracket 2 and the waterproof and airtight membrane 3 are both arranged in the inner cavity, the mud shield bracket 2 is provided with a plurality of air ports, and the plurality of air ports form a tortuous gas flow path in the inner cavity of the metal outer cover 1, and the waterproof and airtight membrane 3 is arranged on the top of the mud shield bracket 2 and covers the air ports located on the top of the mud shield bracket 2.

[0038] The mud guard cover of the utility model forms a tortuous airflow channel in the metal outer cover 1 through the mud guard bracket 2. When the gas detector 5 performs gas detection in a muddy environment, the kinetic energy of the mud, water vapor, etc. entering the metal outer cover 1 from the air inlet 10 will be reduced after multiple turns of the tortuous airflow channel, and the mud and water vapor will be unable to enter the gas detector 5. At the same time, a waterproof and transparent membrane 3 is also provided on the top of the airflow channel. The waterproof and transparent membrane 3 can only allow gas to pass through, while completely blocking water vapor and mud under the gas detector 5, further improving the mud and water blocking effect of the mud guard cover.

[0039] In some embodiments, the metal outer cover 1 is cylindrical, and the plurality of air inlets 10 are distributed along the circumference of the metal outer cover 1 , and the plurality of air inlets 10 are disposed in the middle and upper part of the metal outer cover 1 .

[0040] A mounting portion 11 is provided at the upper end of the metal cover 1 , and the outer diameter of the mounting portion 11 matches the inner diameter of the gas inlet of the gas detector 5 , so that the metal cover 1 can be inserted into the gas inlet of the gas detector 5 .

[0041] In some embodiments, the mud guard bracket 2 includes a first mud guard portion 21 , and the first mud guard portion 21 is disposed above the air inlet 10 .

[0042] The first mudguard portion 21 includes a first mudguard 211 and a second mudguard 213 which are arranged opposite to each other in upper and lower directions, and a middle mudguard 212 which is vertically connected between the first mudguard 211 and the second mudguard 213. The shapes of the first mudguard 211 and the second mudguard 213 are adapted to the shape of the inner cavity. The first mudguard 211, the second mudguard 213 and the middle mudguard 212 are all provided with air holes.

[0043] The air vents include a plurality of first air vents 2110 opened on the first fender 211, a plurality of second air vents 2120 opened on the middle fender 212, and a plurality of third air vents 2130 opened on the second fender 213. The opening direction of the second air vents 2120 is perpendicular or approximately perpendicular to the opening direction of the first air vents 2110. The opening direction of the second air vents 2120 is perpendicular or approximately perpendicular to the opening direction of the third air vents 2130. The projections of the first air vents 2110 and the third air vents 2130 in the height direction do not overlap. The first air vents 2110 and the third air vents 2130 are connected to each other through the second air vents 2120. The first air vents 2110 are connected to the air inlet 10, the third air vents 2130 are connected to the gas inlet of the gas detector 5, and the waterproof and permeable membrane 3 covers the third air vents 2130.

[0044] In some embodiments, the middle mud guard 212 is a polygonal or circular structure with an intermediate cavity formed by multiple connecting plates connected end to end, and the outer side of the middle mud guard 212 is spaced apart from the inner wall of the metal outer cover 1; the second air port 2120 is connected to the intermediate cavity, the third air port 2130 is located above the intermediate cavity, and the first air port 2110 is located outside the intermediate cavity.

[0045] In some embodiments, the middle mudguard 212 is a partition that divides the inner cavity between the first mudguard 211 and the second mudguard 213 into two left and right parts, and the two opposite sides of the middle mudguard 212 are tightly against the cavity wall of the inner cavity. The first air outlet 2110 and the second air outlet 2120 are respectively arranged on both sides of the middle mudguard 212.

[0046] In some embodiments, the mud guard bracket 2 also includes a second mud guard portion 22, which is fixed below the first mud guard portion 21. The second mud guard portion 22 divides the inner cavity of the metal outer cover 1 into a first inner cavity and a second inner cavity. The first inner cavity is located above the second mud guard portion 22, and the second inner cavity is located below the second mud guard portion 22. The air inlet 10 is opened on the cavity wall of the first inner cavity.

[0047] The second mud guard portion 22 has a mud guard cavity 220 with an opening facing downward, and the inner and outer walls of the mud guard cavity 220 are both inclined surfaces. When the gas enters the inner cavity from the air inlet 10, the gas tends to move toward the outer wall of the mud guard cavity 220. The second mud guard portion 22 is provided with a through hole 221 for connecting the first inner cavity with the second inner cavity. The through hole 221 is provided on the side wall of the second mud guard portion 22, and the center line of the through hole 221 is located below the center line of the air inlet 10.

[0048] When the gas enters the inner cavity through the air inlet 10 around the metal outer cover 1, since the gas, mud and water vapor tend to move toward the outer wall of the mud baffle chamber 220, and the outer wall of the mud baffle chamber 220 is an inclined surface, the outer wall of the second mud baffle portion 22 can block most of the water vapor and mud from directly entering the first air port 2110; at the same time, the outer wall of the second mud baffle portion 22 also helps the mud entering the inner cavity to slide down the inclined surface and be discharged from the object hole 221, and the outer wall of the second mud baffle portion 22 also helps the water vapor condense into water droplets to slide down along the inclined surface and be discharged from the object hole 221.

[0049] In some embodiments, the top of the mud retaining cavity 220 is arc-shaped, and the cross section of the second mud retaining portion 22 is arched with the opening facing in the direction of the mud retaining cavity 22. The arc-shaped top helps to weaken the upward impact force of mud and water vapor and reduce the kinetic energy of the upward water vapor.

[0050] In some embodiments, the mud guard cover for the gas detector further includes a snap ring 4 , which is disposed in the inner cavity and at the lower end of the mud guard bracket 2 , and is used to prevent the mud guard bracket 2 from slipping off the metal outer cover 1 .

[0051] Furthermore, the metal outer cover 1 is provided with a mounting groove on the lower cavity wall of the inner cavity, and a mounting boss 222 is provided at the lower end of the second mud guard 22 . The mounting boss 222 and the clamping ring 4 are both installed in the mounting groove, and the clamping ring 4 is arranged below the mounting boss 222 .

[0052] In some embodiments, the metal cover 1 is made of stainless steel, and the mud guard bracket 2 is made of resin.

[0053] In some embodiments, the inner diameter of the mounting groove at the lower end of the metal cover 1 is adapted to the outer diameter of the mounting portion 11, so that a plurality of mud guards can be connected together up and down and used in combination, such as Figure 3 As shown, to further improve the mud barrier effect.

[0054] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the above embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mud shield for a gas detector, comprising a metal outer cover (1), wherein the metal outer cover (1) has an inner cavity penetrating the metal outer cover (1) in a height direction, and the metal outer cover (1) is provided with a plurality of air inlets (10) communicating with the inner cavity, wherein: The mud shield for the gas detector further comprises a mud shield bracket (2) and a waterproof and permeable membrane (3) arranged in the inner cavity, the mud shield bracket (2) being provided with a plurality of gas passages, the plurality of gas passages forming a tortuous gas flow channel in the inner cavity of the metal outer cover (1); The waterproof and airtight membrane (3) is arranged on the top of the mud guard bracket (2) and covers the air outlet located on the top of the mud guard bracket (2).

2. The mud shield for a gas detector according to claim 1, characterized in that: The metal outer cover (1) is cylindrical, and the plurality of air inlets (10) are distributed along the circumference of the metal outer cover (1); The plurality of air inlets (10) are arranged at the middle and upper part of the metal outer cover (1).

3. The mud shield for a gas detector according to claim 1, characterized in that: The mud guard bracket (2) comprises a first mud guard portion (21), wherein the first mud guard portion (21) is arranged above the air inlet (10); The first mudguard portion (21) comprises a first mudguard (211) and a second mudguard (213) which are arranged opposite to each other in the upper and lower parts, and a middle mudguard (212) which is vertically connected between the first mudguard (211) and the second mudguard (213); the shapes of the first mudguard (211) and the second mudguard (213) are adapted to the shape of the inner cavity; the first mudguard (211), the second mudguard (213) and the middle mudguard (212) are all provided with the air outlet.

4. The mud shield for a gas detector according to claim 3, characterized in that: The air outlet comprises a first air outlet (2110) opened on the first fender (211), a second air outlet (2120) opened on the middle fender (212), and a third air outlet (2130) opened on the second fender (213); The projections of the first air outlet (2110) and the third air outlet (2130) in the height direction do not overlap, and the first air outlet (2110) and the third air outlet (2130) are connected to each other through the second air outlet (2120); The first air port (2110) is in communication with the air inlet (10), the third air port (2130) is in communication with the gas inlet of the gas detector (5), and the waterproof and permeable membrane (3) covers the third air port (2130).

5. The mud shield for a gas detector according to claim 4, characterized in that: The middle mud guard (212) is a polygonal or circular structure with a middle cavity formed by connecting a plurality of connecting plates end to end in sequence, and a distance is provided between the outer side surface of the middle mud guard (212) and the inner wall of the metal outer cover (1); The second air port (2120) is in communication with the middle cavity, the third air port (2130) is located above the middle cavity, and the first air port (2110) is located outside the middle cavity.

6. The mud shield for a gas detector according to claim 3, characterized in that: The mud guard bracket (2) further comprises a second mud guard portion (22), the second mud guard portion (22) being fixed below the first mud guard portion (21), the second mud guard portion (22) dividing the inner cavity of the metal outer cover (1) into a first inner cavity and a second inner cavity, the first inner cavity being located above the second mud guard portion (22), the second inner cavity being located below the second mud guard portion (22), and the air inlet (10) being opened on the cavity wall of the first inner cavity.

7. The mud shield for a gas detector according to claim 6, characterized in that: The second mud guard portion (22) has a mud guard cavity (220) with an opening facing downward, and the inner side wall and the outer side wall of the mud guard cavity (220) are both inclined surfaces; The second mud guard portion (22) is provided with a through hole (221) for connecting the first inner cavity with the second inner cavity, the through hole (221) is provided on the side wall of the second mud guard portion (22), and the center line of the through hole (221) is located below the center line of the air inlet (10).

8. The mud shield for a gas detector according to claim 7, characterized in that: The top of the mud guard cavity (220) is arc-shaped, and the cross section of the second mud guard portion (22) is arched with the opening facing the top.

9. The mud shield for a gas detector according to any one of claims 1 to 8, characterized in that: The mud guard cover for the gas detector further comprises a clamping ring (4), wherein the clamping ring (4) is arranged in the inner cavity and at the lower end of the mud guard bracket (2).

10. The mud shield for a gas detector according to any one of claims 1 to 8, characterized in that: The upper end of the metal outer cover (1) is provided with a mounting portion (11), and the outer diameter of the mounting portion (11) is adapted to the inner diameter of the gas inlet of the gas detector (5); The outer diameter of the mounting portion (11) matches the inner diameter of the lower end of the metal outer cover (1).

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