Dust-proof device for combustible gas detection probe and combustible gas detector

Abstract

The present invention provides a dust-proof device for a combustible gas detection probe and a combustible gas detector, which relates to combustible gas detection equipment. In the present invention, a tube is sleeved on the probe shield, ventilation holes are provided at the upper end of the tube, an air inlet is provided at the lower end of the tube, and spiral inner rotating blades are provided on the inner wall of the tube. In this way, the gas entering the tube can spiral upward along the inner rotating blades. During the spiral upward process, the gas will generate a rotating scouring effect on the probe shield, which not only increases the chance of the combustible gas in the air contacting the probe shield, but also impacts the dust and other impurities blocked on the probe shield, thereby greatly reducing or even avoiding the blockage problem of the probe shield, improving the dust-proof effect, and further avoiding the interference of dust and other impurities in the reaction of combustible gas catalytic combustion, etc., which is beneficial to improving the detection stability and accuracy of the detection probe.

Description

Technical Field

[0001] The present invention relates to a combustible gas detection device, and more particularly to a dust-proof device for a combustible gas detection probe and a combustible gas detector. Background Art

[0002] In order to achieve real-time detection and remote alarm of the concentration of combustible, toxic and harmful gases in the space of an oil and gas field station, fixed combustible gas detectors are often installed in different areas of the field station, and combustible gas detectors with different distribution densities are set according to the classification of explosion-proof areas.

[0003] In order to enable the detection of leaked combustible gases at different concentrations by the detector in a timely manner, it is often necessary to complete the detection process through different reaction processes and principles of the detection probe of the detector. The detection process determines the concentration value of the combustible gas by the degree of chemical reaction (such as catalytic combustion type, etc.) of the gas entering the probe. When the detector is working, the electronic circuit part of the detector converts the combustion state of the combustible gas in the probe to achieve the output display of the concentration. When there is wind (sand and dust), while the combustible gas enters the probe along with the air, due to the presence of impurities such as sand and dust in the air, the probe is often blocked and the reaction of the combustible gas in the probe is affected, that is, the detection becomes insensitive and inaccurate. Especially when the sand and dust are large, the detector probe may malfunction or even be scrapped.

[0004] Currently, in order to solve the problem of probe failure caused by the influence of sand and dust, a mesh probe guard is usually installed outside the probe to prevent sand and dust from entering and affecting the normal operation of the probe. The dust-proof net and the probe are generally located at the lower end of the detector and are exposed to increase the contact area with the outside gas. However, the above-mentioned mesh probe guard is extremely easy to be blocked, resulting in poor dust-proof effect. Summary of the Invention

[0005] Aiming at the above-mentioned defects in the prior art, the present invention provides a dust-proof device for a combustible gas detection probe and a combustible gas detector, which can greatly reduce or even avoid the blockage problem of the probe and its guard, and improve the dust-proof effect.

[0006] The first aspect of the present invention is to provide a dust-proof device for a combustible gas detection probe, including: a tube, the tube is rotatably sleeved on the probe guard of the detection probe; at least one ventilation hole is provided at the upper end of the side wall of the tube; an air inlet is provided at the lower end of the tube facing away from the detection probe; an inner rotating blade is provided on the inner wall of the tube, the inner rotating blade protrudes inward from the inner wall of the tube and is spirally arranged, and there is a gap for the combustible gas to pass between the inner rotating blade and the probe guard.

[0007] Optionally, two ventilation holes are provided on the tube, and the ventilation holes are symmetrically distributed along the central axis of the tube.

[0008] Optionally, a steering wing is further provided on the tube, and the steering wing is used to drive the tube to rotate relative to the probe shield under the action of wind.

[0009] Optionally, the central axis of the ventilation hole is perpendicular to the extending direction of the steering wing.

[0010] Optionally, the steering wing is integrally provided with the tube.

[0011] Optionally, the steering wing is fixedly welded to the tube.

[0012] Optionally, the tube is made of metal or plastic.

[0013] Optionally, the inner rotating blade is made of metal or plastic.

[0014] Optionally, the steering wing is made of metal or plastic.

[0015] Optionally, the tube is integrally provided with the inner rotating blade.

[0016] Optionally, the lower end of the tube extends downward out of the probe shield.

[0017] Optionally, the tube is used to connect with a meter head connected to the upper end of the detection probe.

[0018] The first aspect of the present invention is to provide a combustible gas detector, including: a meter head, a detection probe is provided at the lower end of the meter head, a probe shield is provided outside the detection probe, and a dust-proof device as described in any one of the foregoing is provided outside the probe shield.

[0019] The dust-proof device for the combustible gas detection probe and the combustible gas detector provided by the present invention, by sleeving a tube on the probe shield, providing a ventilation hole at the upper end of the tube, providing an air inlet at the lower end of the tube, and providing a spirally extending inner rotating blade on the inner wall of the tube, thus, the gas entering the tube can spiral upward along the inner rotating blade, and during the process of its spiral upward movement, the gas will generate a rotating scouring effect on the probe shield, which not only increases the chance of the combustible gas in the air contacting the probe shield, but also impacts the dust and other impurities blocked on the probe shield, thereby greatly reducing or even avoiding the blockage problem of the probe shield, improving the dust-proof effect, and further avoiding the interference of the detection probe due to the blockage of dust and other impurities on the reaction of the combustible gas, which is beneficial to improving the detection stability and accuracy of the detection probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0021] Figure 1 Structural schematic of the dust-proof device for the combustible gas detection probe provided in the first embodiment Figure I ;

[0022] Figure 2 Structural schematic of the dust-proof device for the combustible gas detection probe provided in the first embodiment Figure II ;

[0023] Figure 3 Structural schematic of the dust-proof device for the combustible gas detection probe provided in the first embodiment Figure III ;

[0024] Figure 4 Gas flow direction schematic in the dust-proof device for the combustible gas detection probe provided in the first embodiment Figure I ;

[0025] Figure 5 Gas flow direction schematic in the dust-proof device for the combustible gas detection probe provided in the first embodiment Figure II ;

[0026] Figure 6 Structural schematic diagram of the dust-proof device for the combustible gas detection probe provided in the first embodiment and the meter head

[0027] Explanation of reference numerals:

[0028] 100 - Meter head;

[0029] 101 - Display screen;

[0030] 102 - Detection probe;

[0031] 103 - Probe shield;

[0032] 104 - Electrical interface;

[0033] 200 - Dust-proof device;

[0034] 201 - Tube;

[0035] 201a - Vent hole;

[0036] 201b - Air inlet;

[0037] 202 - Inner rotating blade;

[0038] 203 - Steering wing;

[0039] 203a - Windward side.

[0040] Through the above-mentioned accompanying drawings, specific embodiments of the present invention have been shown, and will be described in more detail hereinafter. These drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the concept of the present invention to those skilled in the art by reference to specific embodiments. Detailed Description of the Embodiments

[0041] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention.

[0042] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0043] Among them, terms such as "upper" and "lower" are used to describe the relative positional relationship of each structure in the accompanying drawings, only for the convenience of clear narration, rather than to limit the scope of implementation of the present invention. The change or adjustment of its relative relationship shall also be regarded as the scope of implementation of the present invention when there is no substantial change in the technical content.

[0044] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0045] In addition, in the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention may be understood according to specific circumstances.

[0046] Embodiment 1

[0047] A combustible gas detector (hereinafter referred to as the detector in the following embodiments) includes: a meter head, a controller is arranged in the meter head, and a display screen can also be installed on the meter head. The display screen is communicatively connected to the controller; a detection probe is arranged at the lower end of the meter head. The detection probe can be used to detect the concentration of combustible gas, and the detection probe is communicatively connected to the controller; wherein, the controller is used to process the signal detected by the detection probe and send the processed signal to the display screen so that the display screen can display the concentration of combustible gas for the on-site operators to understand. In addition, the detector may further include an electrical interface to facilitate the electrical connection of the detector to other devices in the oil and gas field station.

[0048] When there is wind (sand dust), while the combustible gas enters the probe along with the air, due to the presence of impurities such as sand dust in the air, the reaction of the combustible gas in the probe is affected, that is, the detection becomes insensitive. Especially when the sand dust is large, the detector probe may malfunction or even be scrapped.

[0049] Currently, to solve the problem of the probe becoming ineffective due to the influence of sand dust, a mesh probe guard is usually installed outside the probe to block the entry of sand dust and ensure the normal operation of the probe. The dust-proof net and the probe are generally located at the lower end of the detector and are exposed to increase the contact area with the outside gas. However, the above-mentioned mesh probe guard is extremely easy to be blocked, resulting in difficulty for the combustible gas to enter the probe and poor dust-proof effect.

[0050] To overcome the above problems, this embodiment provides a dust-proof device for a combustible gas detection probe.

[0051] Figure 1 Structural schematic of the dust-proof device for a combustible gas detection probe provided in the first embodiment of this Figure I ; Figure 2 Structural schematic of the dust-proof device for a combustible gas detection probe provided in the first embodiment of this Figure II ; Figure 3 Structural schematic of the dust-proof device for a combustible gas detection probe provided in the first embodiment of this Figure III .

[0052] Figure 4 Gas flow direction schematic in the dust-proof device for a combustible gas detection probe provided in the first embodiment of this Figure I ; Figure 5 Gas flow direction schematic in the dust-proof device for a combustible gas detection probe provided in the first embodiment of this Figure II ; Figure 6 Structural schematic diagram of the dust-proof device for a combustible gas detection probe provided in the first embodiment of this and the meter head.

[0053] Please refer to Figures 1 - 6, the dust-proof device 200 for the combustible gas detection probe 102 provided in this embodiment includes: a tube 201 sleeved on the probe shield 103 of the detection probe 102; at least one ventilation hole 201a is provided at the upper end of the side wall of the tube 201; an air inlet 201b is provided at the lower end of the tube 201 facing away from the detection probe 102; an inner rotating blade 202 is provided on the inner wall of the tube 201, and the inner rotating blade 202 protrudes inward from the inner wall of the tube 201 and is spirally arranged, and there is a gap for combustible gas to pass between the inner rotating blade 202 and the probe shield 103.

[0054] Among them, the probe shield 103 is a columnar mesh structure, covering the outside of the detection probe 102 to filter the gas entering the detection probe 102.

[0055] The tube 201 can be a hollow cylinder, rotatably sleeved on the probe shield 103, and there is a gap between the inner wall of the tube 201 and the probe shield 103.

[0056] In some examples, the tube 201 can be connected to a fixed bracket, that is, the tube 201 is supported on the fixed bracket, and the fixed bracket can be connected to other fixed devices in the oil and gas field station.

[0057] In some examples, the upper end of the tube 201 can be connected to the meter head 100 to support and position the tube 201 through the meter head 100. The lower end of the tube 201 has an air inlet 201b, and external air (containing combustible gas) can enter the tube 201 through the air inlet 201b, and then enter the detection probe 102 through the probe shield 103.

[0058] In some examples, the tube 201 has a side wall extending along its circumference and enclosing a closed loop, and the lower end of the side wall can enclose the air inlet 201b.

[0059] In some examples, a lower wall can also be provided at the lower end of the side wall of the tube 201, and at least one through hole is opened on the lower wall, and the at least one through hole forms the air inlet 201b of the tube 201.

[0060] At least one ventilation hole 201a can be provided at the upper end of the side wall of the tube 201, and the ventilation hole 201a can allow the gas in the tube 201 to flow out. Among them, when there are multiple ventilation holes 201a, the multiple ventilation holes 201a can be evenly distributed along the circumference of the tube 201.

[0061] An inner rotating blade 202 is provided on the inner side of the side wall of the tube 201, that is, on the inner wall of the tube 201. The inner rotating blade 202 protrudes inward from the inner wall of the tube 201 and is spirally arranged, and there is a gap for combustible gas to pass between the inner rotating blade 202 and the probe shield 103.

[0062] That is to say, the inner rotating blade 202 is spirally extended upward from the lower end of the side wall. The spiral direction can be set according to actual needs and is not specifically limited in this embodiment.

[0063] In this way, during operation, as Figure 4 shown, air enters the tube 201 from the lower end of the tube 201 and rises along the inner rotating blade 202 on the inner wall of the tube 201. During its spiral upward process, it will generate a rotational scouring effect on the probe shield 103, which not only increases the chance of the combustible gas in the air contacting the probe shield 103, but also impacts the dust and other impurities blocked on the probe shield 103, thus greatly reducing or even avoiding the blockage problem of the probe shield 103, improving the dust-proof effect, and further avoiding the interference of dust and other impurities with the reaction of the combustible gas in the detection probe 102, which is beneficial to improving the detection stability and accuracy of the detection probe 102.

[0064] When the gas in the tube 201 rises to the position where the ventilation hole 201a is located, the gas between the tube 201 and the probe shield 103 can be discharged through the ventilation hole 201a.

[0065] In addition, when there is wind, as Figure 5 shown, a certain negative pressure effect is formed in the tube 201. Part of the dust-containing gas will enter the tube 201 from the ventilation hole 201a. During the rotation of the dust-containing gas in the inner rotating blade 202, the heavier particles in the gas gradually move away from the probe shield 103 at the center position of the tube 201, and the inner rotating blade 202 spirally arranged downward along the inner wall of the tube 201 will rotate and move the separated dust downward along the joint surface between the tube 201 and the inner rotating blade 202, thus ensuring that the dust in the gas is far away from the probe shield 103 and reducing the blockage probability of the probe shield 103.

[0066] At the same time, the lighter components (such as combustible gas, air) in the gas generating a rotating effect in the tube 201 will rotate around the probe shield 103 and enter the probe shield 103 to ensure the normal detection of the combustible gas by the detection probe 102. Finally, the dust and other impurities on the probe shield 103 are continuously scoured by the rotating gas to reduce the maintenance frequency and achieve the purpose of continuous stability of the detection performance of the detection probe 102.

[0067] The dust-proof device 200 for the combustible gas detection probe 102 provided in this embodiment is configured by sleeving a tube 201 on the probe shield 103, arranging a ventilation hole 201a at the upper end of the tube 201, arranging an air inlet 201b at the lower end of the tube 201, and arranging an internally spirally extending inner spiral blade 202 on the inner wall of the tube 201. In this way, the gas entering the tube 201 can spiral upward along the inner spiral blade 202. During its spiral upward process, it will generate a rotational scouring effect on the probe shield 103, which not only increases the chance of the combustible gas in the air contacting the probe shield 103, but also impacts the dust and other impurities blocked on the probe shield 103, thereby greatly reducing or even avoiding the blockage problem of the probe shield 103, improving the dust-proof effect, and further avoiding the interference of dust and other impurities with the reaction of the combustible gas in the detection probe 102, which is beneficial to improving the detection stability and accuracy of the detection probe 102.

[0068] Optionally, two ventilation holes 201a are arranged on the tube 201, and the ventilation holes 201a are symmetrically distributed along the central axis of the tube 201 to improve the scouring effect of the gas in the tube 201 on the probe shield 103.

[0069] Optionally, the tube 201 is rotatably sleeved on the probe shield 103; a steering wing 203 is further arranged on the tube 201, and the steering wing 203 is used to drive the tube 201 to rotate relative to the probe shield 103 under the action of wind force.

[0070] In this way, as Figure 5 shown, when there is wind, the steering wing 203 drives the tube 201 to rotate around the probe shield 103 as the rotation center under the action of wind force, and more dust-containing gas will enter the tube 201 from the ventilation hole 201a under the negative pressure effect. More dust-containing gas generates a rotational downward movement on the inner spiral blade 202, causing the heavier particles such as dust in the gas to gradually move away from the probe shield 103 at the center position of the tube 201, thereby further reducing the probability and risk of dust in the gas blocking the probe shield 103.

[0071] The greater the wind force, the more obvious the negative pressure effect formed in the tube 201, and the more capable of reducing the probability and risk of dust in the gas blocking the probe shield 103.

[0072] In some examples, the tube 201 can be connected to a fixed bracket, that is, the tube 201 is supported on the fixed bracket to relatively position the central axis of the tube 201 and the central axis of the probe shield 103; the fixed bracket can be connected to other fixed devices in the oil and gas field station.

[0073] Exemplarily, the lower end of the tube 201 is rotatably inserted into the tube hole of the fixed bracket. Of course, the installation position of the fixed bracket is not limited to this, as long as the fixed bracket does not interfere with the installation and function of other components in the dust-proof device 200. In some examples, the tube 201 is used to rotatably connect with the meter head 100 connected to the upper end of the detection probe.

[0074] Exemplarily, an annular groove is provided at the lower end of the meter head 100, and the upper end of the tube 201 is rotatably arranged in the annular groove to relatively position the central axis of the tube 201 and the central axis of the probe shield 103.

[0075] Optionally, the central axis of the ventilation hole 201a is perpendicularly arranged to the windward surface 203a of the turning wing 203, so as to reduce the amount of dust in the gas directly entering the ventilation hole 201a and impacting the probe shield 103 in the tube 201, reduce the adhesion effect of the dust on the probe shield 103, and further reduce the blockage probability of the probe shield 103.

[0076] Among them, the turning wing 203 has a connecting surface connected to the outer side wall of the tube 201, and the connecting surface extends along the axial direction of the tube 201; the turning wing 203 also has two relatively arranged windward surfaces 203a connected to the connecting surface, and the windward surfaces 203a also extend along the axial direction of the tube 201.

[0077] In some examples, the turning wing 203 can be integrally arranged with the tube 201. For example, it can be realized by an integral molding process.

[0078] In some examples, the turning wing 203 is fixedly welded to the tube 201.

[0079] Optionally, the tube 201 is made of metal or plastic; and / or, the inner rotating blade 202 is made of metal or plastic; and / or, the turning wing 203 is made of metal or plastic.

[0080] Optionally, the tube 201 and the inner rotating blade 202 are integrally arranged; for example, it can be realized by an integral molding process.

[0081] Optionally, the lower end of the tube 201 extends downward beyond the probe shield 103, so as to increase the flushing area of the probe shield 103 and improve the dust removal effect on the probe shield 103.

[0082] During normal operation, as Figure 4 shown, the combustible gas-containing air rises from the lower end of the tube 201, part of the air is discharged through the ventilation hole 201a after passing through the probe shield 103, and part of the gas rotates and passes through the probe shield 103 into the detection probe 102 to achieve the normal detection purpose of the combustible gas.

[0083] When the wind blows, asFigure 5 As shown in the figure, the force exerted by the wind on the steering wing 203 causes the tube 201 to rotate with the wind direction and maintain a relatively stable position relative to the wind direction. The ventilation hole 201a at the upper end of the tube 201 is perpendicular to the direction of the wind and exposes a certain windward area. Under the negative pressure effect of the tube 201, the gas containing sand and dust enters the tube 201 through the ventilation hole 201a, rotates and moves downward along the inner rotating blade 202, and is discharged from the lower end of the tube 201.

[0084] Continuously performing the above operation process, the gas containing sand and dust entering through the ventilation hole 201a rotates on the inner rotating blade 202, causing the heavier particles in the gas to gradually move away from the probe shield 103 at the center position of the tube 201. The inner rotating blade 202 spirally arranged along the inner wall of the tube 201 rotates and moves the separated sand and dust downward along the joint surface between the tube 201 and the inner rotating blade 202, thereby ensuring that the sand and dust in the gas are far away from the probe shield 103 and reducing the probability of blockage of the probe shield 103.

[0085] In addition, the lighter components (such as combustible gas and air) in the gas that generate a rotating effect in the tube 201 rotate around the probe shield 103 and pass through the probe shield 103 to reach the detection probe 102, ensuring the normal detection of the combustible gas by the detection probe 102. Finally, the impurities on the probe shield 103 are continuously washed and cleaned by the rotating gas, reducing the maintenance frequency and achieving the purpose of continuously stabilizing the detection performance of the detection probe 102.

[0086] Embodiment 2

[0087] Please continue to refer to Figures 1 - 6 , this embodiment provides a combustible gas detector, including: a meter head 100, a detection probe 102 is arranged at the lower end of the meter head 100, a probe shield 103 is arranged outside the detection probe 102, and the aforementioned dust-proof device 200 is arranged outside the probe shield 103.

[0088] A controller is arranged in the meter head 100, and a display screen 101 can also be installed on the meter head 100. The display screen 101 is communicatively connected to the controller; the detection probe 102 can be used to detect the concentration of combustible gas, and the detection probe 102 is communicatively connected to the controller; wherein, the controller is used to process the signal detected by the detection probe 102 and send the processed signal to the display screen 101, so that the display screen 101 displays the real-time concentration of combustible gas for the on-site operators to understand.

[0089] In addition, the detector can also include an electrical interface 104 to facilitate the electrical connection of the detector to other devices in the oil and gas field station; of course, the detector can also include a wireless communication device for communicatively connecting to other devices in the oil and gas field station.

[0090] Among them, the structure and function of the dust-proof device 200 are the same as those in the first embodiment described above, and will not be elaborated here.

[0091] During the normal operation of the combustible gas detector provided in this embodiment, as Figure 4 shown, the air containing combustible gas rises from the lower end of the tube 201. Part of the air is discharged through the ventilation hole 201a after passing through the probe shield 103, and part of the gas rotates through the probe shield 103 and enters the detection probe 102 to achieve the normal detection purpose of the combustible gas.

[0092] When the wind blows, as Figure 5 shown, the force of the wind acting on the steering wing 203 causes the tube 201 to rotate with the wind direction and maintain a relatively stable position relative to the wind direction. The ventilation hole 201a at the upper end of the tube 201 is perpendicular to the direction of the wind and exposes a certain windward area. The gas containing dust enters the tube 201 through the ventilation hole 201a and then rotates and moves downward along the inner rotating blade 202 and is discharged from the lower end of the tube 201.

[0093] Continuously performing the above action process, the gas containing dust entering through the ventilation hole 201a rotates on the inner rotating blade 202 and makes the heavier particles in the gas gradually move away from the probe shield 103 located at the center of the tube 201. The inner rotating blade 202 spirally arranged along the inner wall of the tube 201 rotates and moves the separated dust downward along the joint surface between the tube 201 and the inner rotating blade 202, thereby ensuring that the dust in the gas is far away from the probe shield 103 and reducing the probability of blockage of the probe shield 103.

[0094] In addition, the lighter components (such as combustible gas, air) in the gas that generate a rotating effect in the tube 201 rotate around the probe shield 103 and pass through the probe shield 103 to reach the detection probe 102, ensuring the normal detection of the combustible gas by the detection probe 102. Finally, the impurities on the probe shield 103 are continuously washed and cleaned by the rotating gas to reduce the maintenance frequency and achieve the purpose of maintaining the continuous stability of the detection performance of the detection probe 102.

[0095] The combustible gas detector provided in this embodiment is configured such that a tube 201 is sleeved over the probe shield 103. An air vent 201a is provided at the upper end of the tube 201, an air inlet 201b is provided at the lower end of the tube 201, and spiral inner rotating blades 202 are provided on the inner wall of the tube 201. In this way, the gas entering the tube 201 can spiral upward along the inner rotating blades 202. During its spiral upward movement, a rotational scouring effect will be exerted on the probe shield 103, which not only increases the chance of the combustible gas in the air coming into contact with the probe shield 103, but also impacts impurities such as dust blocking the probe shield 103. Thus, the problem of blockage of the probe shield 103 is greatly reduced or even avoided, the dust-proof effect is improved, and furthermore, interference of impurities such as dust with the reaction of the combustible gas is avoided, which is beneficial to improving the detection stability and accuracy of the detection probe 102. Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dust-proof device for a combustible gas detection probe, characterized in that, include: A tube, the tube being used to be sleeved on the probe shield of the detection probe; at least one vent is provided at the upper end of the side wall of the tube; an air inlet is provided at the lower end of the tube facing away from the detection probe; an inwardly rotating blade is provided on the inner wall of the tube, the inwardly rotating blade protruding inwardly from the inner wall of the tube and being spirally arranged, and a gap is provided between the inwardly rotating blade and the probe shield for the passage of combustible gas; The tube is provided with two vent holes, and the vent holes are symmetrically distributed along the central axis of the tube; The tube is rotatably sleeved on the probe shield; The tube is also provided with a steering wing, which is used to drive the tube to rotate relative to the probe shield under the action of wind; The central axis of the vent is arranged perpendicular to the windward surface of the steering wing, wherein the steering wing has a connecting surface connected to the outer side wall of the tube, and the connecting surface extends along the axial direction of the tube. The steering wing also has two windward surfaces arranged opposite to each other and connected to the connecting surface, and the windward surfaces extend along the axial direction of the tube.

2. The dust-proof device of the combustible gas detection probe according to claim 1, wherein, The steering wing is integrally arranged with the tube.

3. The dust-proof device of the combustible gas detection probe according to claim 1, characterized in that The steering wing is fixed to the tube by welding.

4. The dust-proof device for the combustible gas detection probe according to claim 1, wherein, The tube is used for rotationally connecting with the meter head connected to the upper end of the detection probe.

5. The dust-proof device for the combustible gas detection probe according to claim 1 is characterized in that, The tube is made of metal or plastic; And / or, the inner rotating blades are made of metal or plastic; And / or, the steering wing is made of metal or plastic.

6. The dust-proof device for the combustible gas detection probe according to claim 1, characterized in that, The tube is integrally provided with the inwardly rotating blades; And / or, the lower end of the tube extends downwardly out of the probe shield.

7. A combustible gas detector, characterized in that, include: A meter head, wherein a detection probe is provided at the lower end of the meter head, a probe shield is provided outside the detection probe, and a dustproof device according to any one of claims 1 to 6 is provided outside the probe shield.

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