A highly sensitive toxic gas concentration detector

Abstract

The application relates to the technical field of detectors, in particular to a toxic gas concentration detector with high sensitivity, which comprises a gas concentration detector body, a sensor is connected to the bottom of the gas concentration detector body, a support is detachably connected to the rear side of the gas concentration detector body through bolts, the top of the support is provided with a base with an internal cavity, a toxic gas treatment mechanism for treating toxic gas is arranged in the base, a gas blowing mechanism for blowing gas to the outer surface of the gas concentration detector body is arranged on the upside of the base, the toxic gas treatment mechanism comprises an activated carbon plate fixed to the upper position in the internal cavity of the base, and the internal cavity of the base is divided into a clean gas cavity and a treatment cavity by the activated carbon plate. The application solves the problems that the contact area between the toxic gas and the treatment liquid is small, the reaction between the toxic gas and the treatment liquid is slow, some toxic gas which does not completely react with the treatment liquid is directly discharged from the base, and the treatment effect of the toxic gas is poor.

Description

Technical Field

[0001] This invention relates to the field of detector technology, specifically to a highly sensitive toxic gas concentration detector. Background Technology

[0002] Toxic gas detectors are used to detect toxic gases in the surrounding atmosphere, serving as a safety warning. They are widely used in various petroleum, petrochemical, and chemical production areas; municipal, fire protection, gas, telecommunications, coal, metallurgy, power, pharmaceutical, food processing, and other locations where toxic and harmful gases exist. Combustible / toxic gas detectors sample the electrical signal on the sensor, process the data internally, and output a 4-20mA current signal or Modbus bus signal corresponding to the ambient gas concentration.

[0003] A high-sensitivity toxic gas monitoring detector, as described in an existing Chinese patent (authorization announcement number: CN113391038A), includes an adjustment mechanism, a limiting mechanism, and a filtering mechanism. The adjustment mechanism comprises a sleeve, a dustproof plate, a limiting bolt, an adjusting rod, and a limiting hole, with the sleeve symmetrically arranged on the gas handling mechanism. The limiting mechanism includes a limiting block, a fixing block, a rotating rod, and a limiting plate. This high-sensitivity toxic gas monitoring detector is equipped with an exhaust fan, which can quickly exhaust harmful gases in the air into the sensor at the bottom of the toxic gas concentration detector body for detection. This facilitates timely detection of harmful gas leaks by the sensor, thereby improving the sensitivity of the device.

[0004] The invention starts a fan to discharge toxic gas into the treatment liquid through a connecting pipe. The toxic gas can only react and neutralize with the treatment liquid near the connecting pipe. The contact area between the toxic gas and the treatment liquid is small, which makes the reaction between the toxic gas and the treatment liquid slow. Some toxic gas that has not completely reacted with the treatment liquid is easy to be discharged directly from the base, resulting in poor treatment effect of toxic gas. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a highly sensitive toxic gas concentration detector, which solves the problems of small contact area between toxic gas and treatment liquid, slow reaction between toxic gas and treatment liquid, and easy direct discharge of some toxic gas that has not fully reacted with the treatment liquid from the base, resulting in poor toxic gas treatment effect.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a highly sensitive toxic gas concentration detector, comprising a gas concentration detector body, a sensor connected to the bottom of the gas concentration detector body, a bracket detachably connected to the rear side of the gas concentration detector body by bolts, a hollow base at the top of the bracket, a toxic gas treatment mechanism for treating toxic gas inside the base, and a blowing mechanism for blowing air onto the outer surface of the gas concentration detector body on the upper side of the base. The toxic gas treatment mechanism includes an activated carbon plate fixed inside the upper part of the base, through which the activated carbon plate blows air onto the outer surface of the gas concentration detector body. The interior of the base is divided into a clean air chamber and a treatment chamber. An air inlet is located on the left side of the base, and an air outlet is located on the upper part of the activated carbon plate on the right side of the base. A fan is installed at the air inlet of the base, and an air supply duct is fixed to the right side of the fan. A circular cross-section transfer chamber is connected to the right side of the air supply duct. A connecting pipe 1 is connected to the upper side of the outer wall of the transfer chamber, and a connecting pipe 2 is connected to the lower side of the outer wall of the transfer chamber. A gas distribution component is installed in the transfer chamber to pass the gas in the air supply duct into the connecting pipe 1 or the connecting pipe 2. A gas distributor is connected to the bottom of the connecting pipe 2 through a rotary joint. Multiple L-shaped air outlet pipes are arranged in a ring on the outer wall of the gas distributor.

[0009] Preferably, the gas distribution assembly includes a motor one fixed to the outer wall of the transfer chamber, the output end of the motor one extending through into the transfer chamber and fixed with a rotating shaft, the end of the rotating shaft away from the motor one being rotatably connected to the transfer chamber, a quarter-cylindrical block fixed to the outer wall of the rotating shaft, the outer circular wall of the block fitting against the inner wall of the transfer chamber, and two limiting plates fixed to the inner wall of the transfer chamber, the two limiting plates being located between the air supply duct and connecting pipe one and connecting pipe two, respectively.

[0010] Preferably, the number of the plurality of air outlet pipes is at least four, with two pipes forming a group, and the air outlet end of each group of air outlet pipes has one opening facing upward and the other opening downward.

[0011] Preferably, the base is provided with a rotating mechanism for driving the air distributor to rotate.

[0012] Preferably, the rotating mechanism includes a bevel gear one fixed on the upper side of the transfer chamber, a motor two fixed on the rear side of the outer wall of the transfer chamber, the output end of the motor two extending through into the transfer chamber and fixed with a bevel gear two, and the bevel gear one and the bevel gear two meshing and transmitting power.

[0013] Preferably, the blowing mechanism includes a jet pipe disposed on the front side of the gas concentration detector body, a plurality of jet heads are equidistantly mounted on the jet pipe, and a connecting pipe extends upward through to the upper side of the base and connects to the top pipe of the jet pipe.

[0014] Preferably, the bottom of the gas concentration detector body is provided with a filtering mechanism for filtering the gas entering the sensor.

[0015] Preferably, the filtering mechanism includes a filter cover with a cylindrical cross-section installed on the outside of the sensor. A motor is fixed to the bottom wall of the filter cover. The output end of the motor extends downward through to the bottom of the filter cover and is fixed with a brush plate with a "U" shaped cross-section. The side wall and bottom wall of the brush plate are provided with brushes that abut against the surface of the filter cover. A guide ring with a circular cross-section is fixed to the top of the brush plate. The upper part of the outer wall of the filter cover slides with the guide ring through a guide groove.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides a highly sensitive toxic gas concentration detector, which has the following beneficial effects:

[0018] 1. After the gas concentration detector detects toxic gas, it starts the fan, which draws air from the air inlet into the hood. The air in the hood is then introduced into the transfer chamber. The gas in the transfer chamber is then introduced into the connecting pipe 2 through the gas distribution component, and then into the gas distributor. Finally, the gas is discharged into the treatment chamber through multiple air outlets on the outer wall of the gas distributor to react with the treatment liquid. This makes the toxic gas more dispersed and increases the contact area between it and the treatment liquid, which can accelerate the reaction speed between the toxic gas and the treatment liquid and improve the treatment effect of toxic gas.

[0019] 2. By setting multiple outlet pipes with an "L"-shaped cross-section on the outer wall of the gas distributor, and with the outlet ends of the multiple outlet pipes facing upwards or downwards, part of the toxic gas can be located in the upper part of the treatment liquid and part in the lower part of the treatment liquid. This can maximize the dispersion effect of the toxic gas in the treatment liquid, increase the contact area between the reaction liquid and the toxic gas, and further improve the treatment effect of the toxic gas.

[0020] 3. By rotating the gas separator through the rotating mechanism, the gas separator can be rotated, which can further improve the dispersion effect of toxic gases in the treatment liquid, thereby further improving the treatment effect of toxic gases. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a cross-sectional view of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the toxic gas treatment mechanism of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the gas distribution component of the present invention;

[0026] Figure 5 This is a schematic diagram of the rotating mechanism of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the filtration mechanism of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Gas concentration detector body; 2. Sensor; 3. Bracket; 4. Base; 5. Toxic gas treatment mechanism; 51. Activated carbon plate; 52. Fan; 53. Air supply duct; 54. Transfer chamber; 55. Connecting pipe one; 56. Connecting pipe two; 57. Gas distributor; 58. Gas outlet pipe; 59. Gas distribution assembly; 591. Motor one; 592. Rotating shaft; 593. Block; 594. Limiting plate; 6. Rotating mechanism; 61. Bevel gear one; 62. Motor two; 63. Bevel gear two; 7. Air blowing mechanism; 71. Air jet pipe; 72. Air jet head; 8. Filtering mechanism; 81. Filter cover; 82. Motor three; 83. Brush plate; 84. Guide ring. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Combination Figures 1-3 A highly sensitive toxic gas concentration detector includes a gas concentration detector body 1, a sensor 2 connected to the bottom of the gas concentration detector body 1, and a bracket 3 detachably connected to the rear side of the gas concentration detector body 1 by bolts. The top of the bracket 3 is provided with an internally hollow base 4, and the base 4 is provided with a toxic gas treatment mechanism 5 for treating toxic gas. The upper side of the base 4 is provided with a blowing mechanism 7 for blowing air onto the outer surface of the gas concentration detector body 1. In use, the gas concentration detector body 1 is fixed to the bracket 3 by bolts, and the bracket 3 is then fixed near the location where the gas needs to be detected. After the gas concentration detector body 1 detects toxic gas, the toxic gas is treated by the toxic gas treatment mechanism 5. After long-term use, a layer of dust will accumulate on the surface of the gas concentration detector body 1. The dust layer can be blown off by blowing air onto the outer surface of the gas concentration detector body 1 by the blowing mechanism 7.

[0032] Specifically, the toxic gas treatment mechanism 5 includes an activated carbon plate 51 fixed inside the upper part of the base 4. The activated carbon plate 51 divides the interior of the base 4 into a clean gas chamber and a treatment chamber. An air inlet is provided on the left side of the base 4, and an air outlet is provided on the right side of the base 4 above the activated carbon plate 51. A fan 52 is installed at the air inlet of the base 4. An air supply duct 53 is fixed to the right side of the fan 52. A circular cross-section transfer chamber 54 is connected to the right side of the air supply duct 53. A connecting pipe 1 55 is connected to the upper side of the outer wall of the transfer chamber 54, and a connecting pipe 2 56 is connected to the lower side of the outer wall of the transfer chamber 54. A gas distribution component 59 is provided inside the transfer chamber 54 to pass the gas in the air supply duct 53 into the connecting pipe 1 55 or the connecting pipe 2 56. A gas distributor 57 is connected to the bottom of the connecting pipe 2 56 through a rotary joint. Multiple L-shaped gas outlet pipes 58 are arranged in a ring on the outer wall of the gas distributor 57.

[0033] During use, the treatment chamber is filled with a treatment liquid for reacting with toxic gases. After the gas concentration detector body 1 detects toxic gases, the fan 52 is activated, which sends the air from the air inlet into the air supply duct 53. The air supply duct 53 then sends the gas into the transfer chamber 54. The gas in the transfer chamber 54 is then sent into the connecting pipe 56 through the gas distribution assembly 59, and then into the gas distributor 57. Finally, the gas is discharged into the treatment chamber through multiple air outlet pipes 58 on the outer wall of the gas distributor to react with the treatment liquid. This makes the toxic gases more dispersed and increases the contact area between them and the treatment liquid, which can accelerate the reaction speed between the toxic gases and the treatment liquid and improve the treatment effect of the toxic gases. The neutralized gas is then filtered through the activated carbon plate 51 and discharged from the air outlet.

[0034] like Figure 3 and Figure 4 As shown, in order to pass the gas in the air supply duct 53 into the connecting pipe 55 or the connecting pipe 56, the following design is also made: the gas distribution assembly 59 includes a motor 591 fixed to the outer wall of the transfer chamber 54. The output end of the motor 591 extends through into the transfer chamber 54 and is fixed with a rotating shaft 592. The end of the rotating shaft 592 away from the motor 591 is rotatably connected to the transfer chamber 54. A quarter-cylindrical block 593 is fixed to the outer wall of the rotating shaft 592. The outer circular wall of the block 593 fits against the inner wall of the transfer chamber 54. Two limiting plates 594 are fixed to the inner wall of the transfer chamber 54. Two limiting plates 594 are located between the air supply duct 53 and connecting pipe 1 55 and connecting pipe 2 56, respectively. After the motor 1 591 is started, it can drive the rotating shaft 592 to rotate. After the rotating shaft 592 rotates, it can drive the block 593 to rotate. The limiting plates 594 can restrict the block 593. After the block 593 rotates to the side of connecting pipe 1 55, it can block the connection between connecting pipe 1 55 and the transfer chamber 54, so that the gas enters the connecting pipe 2 56 after entering the transfer chamber 54, and vice versa, so that the gas enters the connecting pipe 1 55.

[0035] To clean the dust layer on the outer surface of the gas concentration detector body 1, the following design is also made: the blowing mechanism 7 includes a jet pipe 71 set on the front side of the gas concentration detector body 1, and multiple jet heads 72 are installed at equal intervals on the jet pipe 71. The connecting pipe 1 55 extends upward through to the upper side of the base 4 and connects to the top pipe of the jet pipe 71. The connecting pipe 2 56 is blocked by the gas distribution assembly 59, so that the gas enters the connecting pipe 1 55 after entering the transfer chamber 54, and then enters the jet pipe 71 after entering the connecting pipe 1 55. Finally, the gas is sprayed onto the outer surface of the gas concentration detector body 1 through the jet head 72, thereby cleaning the dust layer on the surface of the gas concentration detector body 1.

[0036] To further disperse the toxic gases within the treatment liquid, the following design is implemented: there are at least four gas outlet pipes 58, arranged in pairs, with one outlet pipe 58 opening upwards and the other downwards. This design ensures that some of the toxic gases are located in the upper part of the treatment liquid, while others are located in the lower part.

[0037] like Figure 5 As shown, in order to increase the contact area between toxic gas and reaction liquid, the following design is also made: the base 4 is provided with a rotating mechanism 6 for driving the gas distributor 57 to rotate. By driving the gas distributor 57 to rotate through the rotating mechanism 6, the toxic gas can be dispersed more evenly, the contact area between the reaction liquid and the toxic gas can be larger, and the treatment effect of toxic gas can be improved.

[0038] Specifically, the rotating mechanism 6 includes a bevel gear 61 fixed on the upper side of the transfer chamber 54, a motor 62 fixed on the rear side of the outer wall of the transfer chamber 54, and a bevel gear 63 fixed to the output end of the motor 62 extending into the transfer chamber 54. The bevel gear 61 and the bevel gear 63 mesh and drive each other. After the motor 62 is started, it can drive the bevel gear 61 to rotate. When the bevel gear 61 rotates, it can drive the bevel gear 63 to rotate. The rotation of the bevel gear 63 drives the transfer chamber 54 to rotate, thereby driving the air outlet pipe 58 to rotate when the transfer chamber 54 is in operation.

[0039] like Figure 6 As shown, in order to avoid the sensor 2 being blocked by the dust layer and affecting the sensitivity of the gas concentration detector body 1, the following design is also made: the bottom of the gas concentration detector body 1 is provided with a filter mechanism 8 for filtering the gas entering the sensor 2, so as to minimize the possibility of the sensor 2 being blocked by the dust layer and affecting the sensitivity of the gas concentration detector body 1.

[0040] Specifically, the filtration mechanism 8 includes a cylindrical filter cover 81 installed on the outside of the sensor 2. A motor 82 is fixed to the bottom wall of the filter cover 81. The output end of the motor 82 extends downward through the bottom of the filter cover 81 and is fixed with a U-shaped brush plate 83. The side wall and bottom wall of the brush plate 83 near the filter cover 81 are provided with brushes that abut against the surface of the filter cover 81. A circular guide ring 84 is fixed to the top of the brush plate 83. The upper part of the outer wall of the filter cover 81 slides with the guide ring 84 through a guide groove. The gas can be filtered by the filter cover 81 before entering the sensor 2. When the motor 82 is started, it can drive the brush plate 83 to rotate. When the brush plate 83 rotates, the brushes of the brush plate 83 can sweep off the dust layer attached to the surface of the filter cover 81, which can minimize the blockage of the filter cover 81 surface caused by the dust layer and affect the gas passage. At the same time, the guide ring 84 rotates in the guide groove, which can improve the stability of the brush plate 83 when rotating.

[0041] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A highly sensitive toxic gas concentration detector, comprising a gas concentration detector body (1), wherein a sensor (2) is connected to the bottom of the gas concentration detector body (1), characterized in that: The gas concentration detector body (1) is detachably connected to a bracket (3) by bolts. The bracket (3) has a hollow base (4) at the top. The base (4) has a gas treatment mechanism (5) for treating toxic gas. The upper side of the base (4) has a blowing mechanism (7) for blowing gas onto the outer surface of the gas concentration detector body (1). The toxic gas treatment mechanism (5) includes an activated carbon plate (51) fixed inside the upper part of the base (4). The activated carbon plate (51) divides the interior of the base (4) into a clean gas chamber and a treatment chamber. An air inlet is provided on the left side of the base (4), and an air outlet is provided on the right side of the base (4) above the activated carbon plate (51). A fan (52) is installed on the base (4) at the air inlet. An air supply duct (53) is fixed to the right side of the fan (52). A circular cross-section transfer tube is connected to the right side of the air supply duct (53). The upper side of the outer wall of the transfer chamber (54) is connected to a connecting pipe 1 (55), and the lower side of the outer wall of the transfer chamber (54) is connected to a connecting pipe 2 (56). The transfer chamber (54) is equipped with a gas distribution component (59) for passing the gas in the air supply duct (53) into the connecting pipe 1 (55) or the connecting pipe 2 (56). The bottom of the connecting pipe 2 (56) is connected to a gas distributor (57) through a rotary joint. The outer wall of the gas distributor (57) has a ring array of multiple air outlet pipes (58) with an "L" shaped cross section. The gas distribution assembly (59) includes a motor (591) fixed to the outer wall of the transfer chamber (54). The output end of the motor (591) extends through into the transfer chamber (54) and is fixed with a rotating shaft (592). The end of the rotating shaft (592) away from the motor (591) is rotatably connected to the transfer chamber (54). A quarter-cylindrical block (593) is fixed to the outer wall of the rotating shaft (592). The outer circular wall of the block (593) fits against the inner wall of the transfer chamber (54). Two limiting plates (594) are fixed to the inner wall of the transfer chamber (54). The two limiting plates (594) are located between the air supply duct (53) and the connecting pipe (55) and the connecting pipe (56), respectively. The number of the air outlet pipes (58) is at least 4, with each pair forming a group, and the air outlet end of each group of air outlet pipes (58) has one opening facing upwards and the other opening facing downwards.

2. The highly sensitive toxic gas concentration detector according to claim 1, characterized in that: The base (4) is provided with a rotating mechanism (6) for driving the air distributor (57) to rotate.

3. A highly sensitive toxic gas concentration detector according to claim 2, characterized in that: The rotating mechanism (6) includes a bevel gear one (61) fixed on the upper side of the transfer chamber (54), a motor two (62) fixed on the rear side of the outer wall of the transfer chamber (54), the output end of the motor two (62) extends through into the transfer chamber (54) and is fixed with a bevel gear two (63), and the bevel gear one (61) and the bevel gear two (63) mesh and drive each other.

4. A highly sensitive toxic gas concentration detector according to claim 3, characterized in that: The blowing mechanism (7) includes a jet pipe (71) located on the front side of the gas concentration detector body (1), and multiple jet heads (72) are installed at equal intervals on the jet pipe (71). A connecting pipe (55) extends upward through to the upper side of the base (4) and connects to the top of the jet pipe (71).

5. A highly sensitive toxic gas concentration detector according to claim 1, characterized in that: The gas concentration detector body (1) has a filter mechanism (8) at the bottom for filtering the gas entering the sensor (2).

6. A highly sensitive toxic gas concentration detector according to claim 5, characterized in that: The filtering mechanism (8) includes a filter cover (81) with a cylindrical cross-section installed on the outside of the sensor (2). A motor (82) is fixed on the bottom wall of the filter cover (81). The output end of the motor (82) extends downward through to the bottom of the filter cover (81) and is fixed with a brush plate (83) with a "U" shaped cross-section. The side wall and bottom wall of the brush plate (83) near the filter cover (81) are provided with brushes that abut against the surface of the filter cover (81). A guide ring (84) with a circular cross-section is fixed on the top of the brush plate (83). The upper part of the outer wall of the filter cover (81) slides with the guide ring (84) through a guide groove.

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