阅读说明：本技术 可燃气体检测探头的防尘装置及可燃气体检测仪 (Dust keeper and combustible gas detector of combustible gas test probe ) 是由 朱昌军 谭建华 邹凯 张春生 韩占方 黄锟 胡超 魏红 郭华清 谭宇 舒元 彭 于 2018-09-10 设计创作，主要内容包括：本发明提供一种可燃气体检测探头的防尘装置及可燃气体检测仪,涉及可燃气体检测设备。本发明通过在探头护罩套设管筒,在管筒上端设置通气孔,在管筒的下端设置进气口,并在管筒的内壁上设置螺旋延伸的内旋叶片,如此,进入管筒内的气体可沿内旋叶片螺旋上升,在其螺旋上升的过程中,气体将对探头护罩产生旋转冲刷作用,既增大了空气中的可燃气体接触探头护罩的机会,同时,还会冲击堵塞在探头护罩上的沙尘等杂质,从而大大减少甚至避免探头护罩的堵塞问题,提高防尘效果,进而避免有沙尘等杂质干涉可燃气体催化燃烧等的反应,利于提高检测探头的检测稳定性和准确性。(The invention provides a dust-proof device of a combustible gas detection probe and a combustible gas detector, and relates to combustible gas detection equipment. According to the invention, the pipe barrel is sleeved on the probe shield, the vent hole is formed in the upper end of the pipe barrel, the air inlet is formed in the lower end of the pipe barrel, and the spirally extending internal rotating blade is arranged on the inner wall of the pipe barrel, so that gas entering the pipe barrel can spirally rise along the internal rotating blade, and in the spiral rising process, the gas can generate a rotary scouring effect on the probe shield, thereby increasing the probability that combustible gas in the air contacts the probe shield, and simultaneously impacting impurities such as sand and dust blocked on the probe shield, greatly reducing or even avoiding the blocking problem of the probe shield, improving the dustproof effect, further avoiding the interference of the impurities such as sand and dust on the reactions such as catalytic combustion of the combustible gas, and being beneficial to the improvement of the detection stability and accuracy of the detection probe.)

1. The utility model provides a combustible gas surveys dust keeper of probe which characterized in that includes:

the pipe barrel is used for being sleeved on a probe shield of the detection probe; the upper end of the side wall of the pipe barrel is provided with at least one vent hole; the lower end of the pipe barrel, which is far away from the detection probe, is provided with an air inlet; the inner wall of the pipe barrel is provided with inner rotating blades, the inner rotating blades inwards protrude out of the inner wall of the pipe barrel and are arranged spirally, and gaps for combustible gas to pass through are formed between the inner rotating blades and the probe shield.

2. The dust keeper of a flammable gas detecting probe according to claim 1, wherein two vent holes are provided on the barrel, and the vent holes are symmetrically distributed along the central axis of the barrel.

3. The dust-proof device for a combustible gas detection probe according to claim 1 or 2, wherein the tube barrel is rotatably fitted over the probe cover;

the pipe barrel is further provided with a steering wing, and the steering wing is used for driving the pipe barrel to rotate relative to the probe shield under the action of wind power.

4. The dust keeper of a flammable gas detecting probe according to claim 3, wherein the central axis of the vent hole is disposed perpendicular to the windward side of the turning wing.

5. The dust keeper of a combustible gas detection probe according to claim 3, wherein the deflector vane is provided integrally with the barrel.

6. The dust keeper of a combustible gas detection probe according to claim 3, wherein the deflector vane is welded to the tube.

7. The dust keeper of claim 3, wherein the tube is adapted to be rotatably connected to a head attached to an upper end of the test probe.

8. The dust keeper of a combustible gas detection probe according to claim 3, wherein the tube is made of metal or plastic;

and/or the internal rotation blade is made of metal or plastic;

and/or the steering wing is made of metal or plastic.

9. The dust-proof device for a combustible gas detection probe according to claim 1 or 2, wherein the tube is provided integrally with the inner rotary vane;

and/or the lower end of the pipe barrel extends downwards out of the probe shield.

10. A combustible gas detector, comprising: the lower end of the gauge outfit is provided with a detection probe, a probe shield is arranged outside the detection probe, and the dustproof device as claimed in any one of claims 1 to 9 is arranged outside the probe shield.

Technical Field

The invention relates to combustible gas detection equipment, in particular to a dustproof device of a combustible gas detection probe and a combustible gas detector.

Background

In order to meet the requirements of real-time detection, remote alarm and the like on the concentration of combustible and toxic and harmful gases in the space of a field area, fixed combustible gas detectors are often arranged in different areas of the field area, and combustible gas detectors with different distribution densities are arranged according to the grade division of an explosion-proof area.

In order to enable leaked combustible gas with different concentrations to be detected by a detector in time, the detection is often completed through different reaction processes and principles of a detection probe of the detector, the detection process is to determine the concentration value of the combustible gas through the degree of chemical reaction (such as catalytic combustion type and the like) of the gas entering the probe, and an electronic circuit part of the detector converts the combustion state of the combustible gas in the probe during working so as to achieve output display of the concentration. When wind (sand and dust) exists, combustible gas enters the probe along with the air, the probe is blocked and the reaction of the combustible gas in the probe is affected due to the existence of impurities such as sand and dust in the air, so that the detection is insensitive and inaccurate, and the condition that the probe of the detector fails or even is scrapped particularly when the sand and dust is large occurs.

At present, in order to solve the problem that the probe fails due to the influence of sand and dust, a net-shaped probe shield is often arranged outside the probe to prevent the sand and dust from entering and influencing the normal operation of the probe. The dust screen and the probe are generally arranged at the lower end of the detector and are exposed so as to increase the contact area with the outside air. However, the above-mentioned net-shaped probe cover is easily blocked, resulting in poor dust-proof effect.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the dustproof device of the combustible gas detection probe and the combustible gas detector, which can greatly reduce or even avoid the blockage problem of the probe and the shield thereof and improve the dustproof effect.

The invention provides a dust-proof device of a combustible gas detection probe, which comprises: the pipe barrel is rotatably sleeved on the probe shield of the detection probe; the upper end of the side wall of the pipe barrel is provided with at least one vent hole; the lower end of the pipe barrel, which is far away from the detection probe, is provided with an air inlet; the inner wall of the pipe barrel is provided with inner rotating blades, the inner rotating blades inwards protrude out of the inner wall of the pipe barrel and are arranged spirally, and gaps for combustible gas to pass through are formed between the inner rotating blades and the probe shield.

Optionally, the tube is provided with two vent holes, and the vent holes are symmetrically distributed along a central axis of the tube.

Optionally, the tube barrel is further provided with a turning wing, and the turning wing is used for driving the tube barrel to rotate relative to the probe shield under the action of wind power.

Optionally, the central axis of the ventilation hole is perpendicular to the extending direction of the turning wing.

Optionally, the turning wing is provided integrally with the barrel.

Optionally, the turning wing is welded and fixed with the tube barrel.

Optionally, the tube is made of metal or plastic.

Optionally, the internal rotation blade is made of metal or plastic.

Optionally, the turning wing is made of metal or plastic.

Optionally, the barrel is integral with the internal rotation vane.

Optionally, the lower end of the barrel is arranged to extend downwardly beyond the probe guard.

Optionally, the tube is adapted to connect with a gauge head attached to the upper end of the test probe.

In a first aspect of the present invention, there is provided a combustible gas detector comprising: the lower extreme of gauge outfit is provided with test probe, the test probe is provided with the probe guard shield outward, the probe guard shield is provided with as aforementioned any dust keeper outward.

According to the dust-proof device of the combustible gas detection probe and the combustible gas detector, the probe shield is sleeved with the pipe barrel, the upper end of the pipe barrel is provided with the vent hole, the lower end of the pipe barrel is provided with the air inlet, and the inner wall of the pipe barrel is provided with the spirally extending inner rotating blade, so that gas entering the pipe barrel can spirally rise along the inner rotating blade, and can generate a rotary scouring effect on the probe shield in the spiral rising process, so that the probability that combustible gas in the air contacts the probe shield is increased, and meanwhile, impurities such as sand and dust blocked on the probe shield can be impacted, so that the blocking problem of the probe shield is greatly reduced or even avoided, the dust-proof effect is improved, the detection probe is prevented from being blocked by impurities such as sand and dust to interfere with the reaction of the combustible gas, and the detection stability and accuracy of the detection probe are improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a first schematic structural diagram of a dust-proof device for a combustible gas detection probe according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a dust-proof device for a combustible gas detection probe according to the first embodiment;

fig. 3 is a schematic structural diagram three of the dust-proof device for a combustible gas detection probe according to the first embodiment;

fig. 4 is a schematic view showing a gas flow direction in the dust-proof device for a combustible gas detection probe according to the first embodiment;

fig. 5 is a schematic view illustrating a gas flow direction in the dust-proof device for a combustible gas detection probe according to the first embodiment;

fig. 6 is a schematic structural diagram of a dust-proof device and a gauge head for a combustible gas detection probe according to the first embodiment.

Description of reference numerals:

100-gauge outfit;

101-a display screen;

102-a detection probe;

103-probe shield;

104-an electrical interface;

200-a dust-proof device;

201-a tube;

201 a-a vent;

201 b-air inlet;

202-internal rotation blade;

203-a turning wing;

203a — windward side.

With the above figures, certain embodiments of the invention have been illustrated and described in more detail below. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, 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 drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The terms "upper" and "lower" are used for describing relative positions of the structures in the drawings, and are only for the sake of clarity, but not for limiting the scope of the present invention, and the relative relationship changes or adjustments are also considered to be within the scope of the present invention without substantial technical changes.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In addition, in the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.