An automated proportioning device for diluting standard gases

Abstract

The present invention belongs to the technical field of gas dilution ratio, and in particular relates to an automatic proportioning device for standard gas dilution, including a housing. An air outlet pipe is fixedly installed through the front side of the housing, and an air supply pipe 1 and four air supply pipes 2 distributed in a rectangle are fixedly installed through the rear side of the housing. A circular box is fixedly installed inside the housing, and a gas supply mechanism is provided inside the circular box. The gas supply mechanism divides the inside of the circular box into four dilution mechanisms, and the four dilution mechanisms are respectively communicated with the corresponding air supply pipes 2. By diluting four kinds of detection gases with a dilution gas, the present invention can not only reduce the cost of purchasing standard gases, but also eliminate the need for manual detection processes that require multiple venue conversions. One person can use four different concentration gases to perform corresponding detection and calibration on gas detector equipment, avoiding missed detections and repeated detections.

Description

Technical Field

[0001] The present invention relates to the technical field of gas dilution ratio, and in particular to an automatic dilution and proportioning device for standard gases. Background Art

[0002] In recent years, with the development of electrochemical and catalytic combustion sensors, the technology of handheld gas detectors has developed rapidly and is also used for the detection of various combustible gases, toxic and harmful gases, and volatile gases. For example, a patent with the patent number 201821819590.0 discloses a four-in-one function gas detector that can detect four different types of gases.

[0003] For the above-mentioned similar four-in-one gas detectors, calibration is required before leaving the factory and after being used for a period of time. The common calibration method is to detect the detection gas with a standard concentration through the instrument, and judge whether the detection result of the instrument is accurate by observing the gas concentration detected by the instrument and comparing it with the standard concentration of the detection gas, and it is necessary to detect and calibrate the same gas at different concentrations.

[0004] However, the above detection method usually requires purchasing a variety of standard gases, and also requires purchasing standard gases of the same type but different concentrations for detection, which will lead to a significant increase in the cost of calibration detection, and requires manual operation to be repeated many times, and it is easy to miss detection and repeated detection. Therefore, an automatic dilution and proportioning device for standard gases is proposed. Summary of the Invention

[0005] In order to solve the disadvantages existing in the prior art, the present invention proposes an automatic dilution and proportioning device for standard gases.

[0006] To achieve the above object, the present invention adopts the following technical solution: An automatic dilution and proportioning device for standard gases, including a housing, an air outlet pipe is fixedly installed through the front side of the housing, a first air supply pipe and four second air supply pipes distributed in a rectangle are fixedly installed through the rear side of the housing, a circular box is fixedly installed inside the housing, a gas supply mechanism is arranged inside the circular box, the gas supply mechanism divides the inside of the circular box into four dilution mechanisms, the four dilution mechanisms are respectively communicated with the corresponding second air supply pipes, a conversion mechanism and four gas distribution mechanisms distributed in a rectangle are arranged between the four dilution mechanisms and the air outlet pipe, the gas supply mechanism is used to evenly distribute the dilution gas to the four dilution mechanisms and mix it with the detection gas in the dilution mechanism to form a reference gas with different concentrations, and the conversion mechanism and the four gas distribution mechanisms cooperate to transport the reference gas in different dilution mechanisms into the air outlet pipe and discharge it through the air outlet pipe.

[0007] Preferably, one side of the circular box close to the air outlet pipe is open. The air supply mechanism includes a circular pipe fixedly connected to the inner wall of the circular box. Four rectangular plates distributed in a rectangular shape are fixedly installed between the outer side of the circular pipe and the inner wall of the circular box. The same sector plate is fixedly installed between two adjacent rectangular plates. The circular pipe and the sector plate are both coaxially arranged with the circular box, and its inner side wall is fixedly connected to the circular pipe.

[0008] Preferably, the dilution mechanism includes a partition plate one, a partition plate two, and a partition plate three arranged between two rectangular plates, and the partition plate one, the partition plate two, and the partition plate three are located on the side of the sector plate away from the air outlet pipe. The partition plate one, the partition plate two, and the partition plate three cooperate with the sector plate and the two rectangular plates to divide the interior of the circular box into a chamber one, a chamber two, a chamber three, and a chamber four.

[0009] Preferably, the partition plate two is fixedly connected to the inner wall of the circular box, the circular pipe, and the two rectangular plates, and the partition plate one and the partition plate three are slidably connected to the inner wall of the circular box, the circular pipe, and the two rectangular plates. The dilution mechanism further includes four rigid pipes, all of which penetrate the circular box and are respectively connected to the interiors of the chamber one, the chamber two, the chamber three, and the chamber four. Flow control valves are provided on all four rigid pipes, and the four rigid pipes are connected to the corresponding second air supply pipes through the same gas distributor one.

[0010] Preferably, the dilution mechanism further includes an electric push rod one and an electric push rod two fixedly connected to one side of the circular box close to the first air supply pipe. The piston rod of the electric push rod one slidably penetrates the circular box, the partition plate two, and the partition plate three and is fixedly connected to the partition plate one. The piston rod of the electric push rod two slidably penetrates the circular box and is fixedly connected to the partition plate three.

[0011] Preferably, the air distribution mechanism includes a straight pipe one, a straight pipe two, a straight pipe three, and a straight pipe four that penetrate the sector plate and are fixedly connected to the sector plate;

[0012] The straight pipe one penetrates the partition plate one, the partition plate two, and the partition plate three and is slidably connected to the partition plate one, the partition plate two, and the partition plate three, and the straight pipe one is connected to the chamber one;

[0013] The straight pipe two penetrates the partition plate one and the partition plate two and is slidably connected to the partition plate one and the partition plate two, and the straight pipe two is connected to the chamber two;

[0014] The straight pipe three penetrates the partition plate one and is slidably connected to the partition plate one, and the straight pipe three is connected to the chamber three. The straight pipe four is connected to the chamber four.

[0015] Preferably, one ends of the first straight pipe, the second straight pipe, the third straight pipe and the fourth straight pipe close to the conversion mechanism are connected to the same second gas distributor. A one-way exhaust valve is connected to the second gas distributor. The conversion mechanism includes a fourth circular plate fixedly connected to the inner wall of the circular box. Four circular holes III are arranged in a rectangular distribution on the fourth circular plate, and a first connector is fixedly installed in each of the four circular holes III. The four first connectors are respectively connected to the corresponding one-way exhaust valves.

[0016] Preferably, the conversion mechanism further includes a first circular plate that is attached to and slidably connected to the fourth circular plate, and the first circular plate is rotatably connected to the inner wall of the circular box. One side of the first circular plate away from the fourth circular plate extends outside the circular box and is fixedly installed with a second circular plate. A third circular plate is rotatably installed on one side of the second circular plate away from the first circular plate. A fixing ring is fixedly sleeved on the side surface of the second circular plate and the part of the first circular plate located outside the circular box. An external gear ring is fixedly sleeved on the fixing ring. The conversion mechanism further includes a motor fixed outside the circular box. A gear meshing with the external gear ring is fixed on the output shaft of the motor. A circular hole II is formed in the third circular plate, and a second connector is fixedly installed in the circular hole II. The second connector and the air outlet pipe are connected by a first conduit. The third circular plate and the circular box are fixedly connected by a plurality of connecting frames.

[0017] Preferably, a strip-shaped hole is formed in the second circular plate, and a circular hole I is formed in the first circular plate. The circular hole I and the circular hole II are communicated through the strip-shaped hole.

[0018] Preferably, a first gas distribution valve is arranged inside the circular pipe. An air inlet pipe and a plurality of distribution pipes are arranged on the first gas distribution valve. The plurality of distribution pipes are respectively communicated with the corresponding first chamber, second chamber, third chamber and fourth chamber. The air inlet pipe penetrates through the circular box and is connected to the first air supply pipe by a second conduit.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] The present invention dilutes four kinds of detection gases with different concentrations by a kind of dilution gas, which can not only reduce the cost of purchasing standard gases, but also avoid the need for manual detection processes of changing sites multiple times. One person can use four different concentration gases to perform corresponding detection and calibration on the gas detector equipment, avoiding the situations of missed detection and repeated detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall structural schematic diagram of a standard gas dilution automatic proportioning device proposed by the present invention Figure 1 ;

[0022] Figure 2 is the overall structural schematic diagram of a standard gas dilution automatic proportioning device proposed by the present invention Figure 2 ;

[0023] Figure 3 This is an overall side sectional view of an automatic proportioning device for standard gas dilution proposed by the present invention;

[0024] Figure 4 This is a partial side sectional view of an automatic proportioning device for standard gas dilution proposed by the present invention Figure 1 ;

[0025] Figure 5 This is a partial side sectional view of an automatic proportioning device for standard gas dilution proposed by the present invention Figure 2 ;

[0026] Figure 6 This is a partial side sectional view of a round box and a conversion mechanism in an automatic proportioning device for standard gas dilution proposed by the present invention;

[0027] Figure 7 This is a partial exploded view of a conversion mechanism in an automatic proportioning device for standard gas dilution proposed by the present invention;

[0028] Figure 8 This is a partial structural schematic diagram of a round box, a gas supply mechanism and a dilution mechanism in an automatic proportioning device for standard gas dilution proposed by the present invention.

[0029] In the figure: 1. Housing; 2. Outlet pipe; 21. First conduit; 3. First gas supply pipe; 31. Second conduit; 4. Second gas supply pipe; 5. Round box; 6. Gas supply mechanism; 61. Round pipe; 62. First gas distribution valve; 63. Distribution pipe; 64. Inlet pipe; 65. Sector plate; 66. Rectangular plate; 7. Dilution mechanism; 71. First partition; 72. Second partition; 73. Third partition; 74. First chamber; 75. Second chamber; 76. Third chamber; 77. Fourth chamber; 78. Rigid pipe; 79. Flow control valve; 710. First gas distributor; 711. First electric push rod; 712. Second electric push rod; 8. Gas distribution mechanism; 81. First straight pipe; 82. Second straight pipe; 83. Third straight pipe; 84. Fourth straight pipe; 85. Second gas distributor; 86. One-way exhaust valve; 87. First connector; 9. Conversion mechanism; 91. First circular plate; 911. First circular hole; 92. Second circular plate; 921. Slot; 93. Third circular plate; 931. Second circular hole; 94. Fixed ring; 95. External gear ring; 96. Motor; 97. Gear; 98. Connecting frame; 99. Fourth circular plate; 991. Third circular hole; 910. Second connector. Detailed implementation manners

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. 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 protection scope of the present invention.

[0031] Please refer to Figures 1-8 , the present invention provides a technical solution: a standard gas dilution automatic proportioning device, including a housing 1. An air outlet pipe 2 is fixedly installed through the front side of the housing 1. A first gas supply pipe 3 and four second gas supply pipes 4 distributed in a rectangle are fixedly installed through the rear side of the housing 1. A circular box 5 is fixedly installed inside the housing 1. A gas supply mechanism 6 is arranged inside the circular box 5. The gas supply mechanism 6 divides the interior of the circular box 5 into four dilution mechanisms 7. The four dilution mechanisms 7 are respectively communicated with the corresponding second gas supply pipes 4. A conversion mechanism 9 and four gas distribution mechanisms 8 distributed in a rectangle are arranged between the four dilution mechanisms 7 and the air outlet pipe 2. The gas supply mechanism 6 is used for evenly distributing the dilution gas to the four dilution mechanisms 7 and mixing it with the detection gas in the dilution mechanisms 7 to form reference gases with different concentrations. The conversion mechanism 9 and the four gas distribution mechanisms 8 cooperate to transport the reference gases in different dilution mechanisms 7 into the air outlet pipe 2 and discharge them through the air outlet pipe 2.

[0032] Further, the four detection gases are CH4, CO, O2, and H2S respectively, and the dilution gas is N2 with the highest content in the air. The four detection gases and the dilution gas are stored in corresponding compressed gas cylinders, and the purity of all is 99.99%. The dilution mechanism 7 can dilute CH4, CO, O2, and H2S into four different concentrations through N2.

[0033] One side of the circular box 5 close to the air outlet pipe 2 is open. The gas supply mechanism 6 includes a circular pipe 61 fixedly connected to the inner wall of the circular box 5. Four rectangular plates 66 distributed in a rectangle are fixedly installed between the outer side surface of the circular pipe 61 and the inner wall of the circular box 5. The same sector plate 65 is fixedly installed between two adjacent rectangular plates 66. The circular pipe 61 and the sector plate 65 are coaxially arranged with the circular box 5, and its inner side wall is fixedly connected to the circular pipe 61.

[0034] The dilution mechanism 7 includes a first partition plate 71, a second partition plate 72, and a third partition plate 73 arranged between two rectangular plates 66, and the first partition plate 71, the second partition plate 72, and the third partition plate 73 are located on the side of the sector plate 65 far from the air outlet pipe 2. The first partition plate 71, the second partition plate 72, and the third partition plate 73 cooperate with the sector plate 65 and the two rectangular plates 66 to divide the interior of the circular box 5 into a first chamber 74, a second chamber 75, a third chamber 76, and a fourth chamber 77.

[0035] The partition plate two 72 is fixedly connected to the inner wall of the circular box 5 and is also fixedly connected to the circular tube 61 and the two rectangular plates 66. The partition plate one 71 and the partition plate three 73 are slidably connected to the inner wall of the circular box 5 and are also slidably connected to the circular tube 61 and the two rectangular plates 66. The dilution mechanism 7 further includes four rigid tubes 78. All four rigid tubes 78 penetrate through the circular box 5 and are respectively connected to the inside of the chamber one 74, the chamber two 75, the chamber three 76 and the chamber four 77. Flow control valves 79 are provided on all four rigid tubes 78, and the four rigid tubes 78 are connected to the corresponding second air supply pipe 4 through the same gas distributor one 710.

[0036] Furthermore, the quantity of gas discharged from the rigid tube 78 can be controlled by the flow control valve 79. Therefore, when the second air supply pipe 4 is connected to the compressed gas cylinder for detecting gas through a pipeline, the detecting gas is evenly distributed to the four rigid tubes 78 by the gas distributor one 710. Then, by controlling the quantity of the detecting gas discharged from the rigid tube 78 through the flow control valve 79, it is possible to control the detecting gas in the same compressed gas cylinder to enter the chamber one 74, the chamber two 75, the chamber three 76 and the chamber four 77 in different quantities.

[0037] The dilution mechanism 7 further includes an electric push rod one 711 and an electric push rod two 712 fixedly connected to one side of the circular box 5 close to the first air supply pipe 3. The piston rod of the electric push rod one 711 slidably penetrates through the circular box 5, the partition plate two 72, the partition plate three 73 and is fixedly connected to the partition plate one 71. The piston rod of the electric push rod two 712 slidably penetrates through the circular box 5 and is fixedly connected to the partition plate three 73.

[0038] The gas distribution mechanism 8 includes a straight tube one 81, a straight tube two 82, a straight tube three 83 and a straight tube four 84 that penetrate through the sector plate 65 and are fixedly connected to the sector plate 65;

[0039] The straight tube one 81 penetrates through the partition plate one 71, the partition plate two 72 and the partition plate three 73 and is slidably connected to the partition plate one 71, the partition plate two 72 and the partition plate three 73, and the straight tube one 81 is connected to the chamber one 74;

[0040] The straight tube two 82 penetrates through the partition plate one 71 and the partition plate two 72 and is slidably connected to the partition plate one 71 and the partition plate two 72, and the straight tube two 82 is connected to the chamber two 75;

[0041] The straight tube three 83 penetrates through the partition plate one 71 and is slidably connected to the partition plate one 71, and the straight tube three 83 is connected to the chamber three 76. The straight tube four 84 is connected to the chamber four 77.

[0042] Furthermore, the straight tube one 81 completely penetrates through the partition plate three 73 and is adjacent to the inner wall of the side of the circular box 5 far from the opening, and the distance between the end of the straight tube one 81 and the inner wall of the circular box 5 is less than the thickness of the partition plate three 73, ensuring that when the flow control valve 79 is in contact with the inner wall of the circular box 5, the straight tube one 81 will not be separated from the partition plate three 73;

[0043] The straight pipe three 83 completely penetrates through the partition one 71 and is adjacent to the partition two 72, and the distance between the end of the straight pipe three 83 and the inner wall of the partition two 72 is less than the thickness of the partition one 71, ensuring that when the partition one 71 and the partition two 72 are fitted together, the partition one 71 will not be separated from the straight pipe three 83;

[0044] The ends of the straight pipe two 82 and the straight pipe four 84 are flush with the partition two 72 and the sector plate 65 respectively, ensuring that the chamber two 75 and the chamber four 77 can be completely compressed.

[0045] One end of the straight pipe one 81, the straight pipe two 82, the straight pipe three 83 and the straight pipe four 84 close to the conversion mechanism 9 is connected to the same gas distributor two 85, and a one-way exhaust valve 86 is connected to the gas distributor two 85. The conversion mechanism 9 includes a circular plate four 99 fixedly connected to the inner wall of the circular box 5. There are four circular holes three 991 distributed in a rectangular shape on the circular plate four 99, and a connector one 87 is fixedly installed in each of the four circular holes three 991. The four connectors one 87 are respectively connected to the corresponding one-way exhaust valves 86.

[0046] The conversion mechanism 9 further includes a circular plate one 91 that is attached to and slidably connected to the circular plate four 99, and the circular plate one 91 is rotatably connected to the inner wall of the circular box 5. One side of the circular plate one 91 away from the circular plate four 99 extends outside the circular box 5 and is fixedly installed with a circular plate two 92. A circular plate three 93 is rotatably installed on one side of the circular plate two 92 away from the circular plate one 91. A same fixed ring 94 is fixedly sleeved on the side of the circular plate two 92 and the part of the circular plate one 91 located outside the circular box 5. An external gear ring 95 is fixedly sleeved on the fixed ring 94. The conversion mechanism 9 further includes a motor 96 fixed to the outside of the circular box 5. A gear 97 meshing with the external gear ring 95 is fixed to the output shaft of the motor 96. A circular hole two 931 is opened on the circular plate three 93, and a connector two 910 is fixedly installed in the circular hole two 931. The connector two 910 and the air outlet pipe 2 are connected by a conduit one 21. The circular plate three 93 is fixedly connected to the circular box 5 through a plurality of connecting frames 98.

[0047] Further, start the motor 96 to drive the gear 97 to rotate. The gear 97 then drives the fixed ring 94, the circular plate two 92 and the circular plate one 91 to rotate through the external gear ring 95. The rotating circular plate one 91 will make the circular hole one 911 coaxial with different circular holes three 991 and in a communicating state with the corresponding connectors one 87, and the rotation angle of the external gear ring 95 each time is 90 degrees.

[0048] A strip-shaped hole 921 is opened on the circular plate two 92, and a circular hole one 911 is opened on the circular plate one 91. The circular hole one 911 and the circular hole two 931 are communicated through the strip-shaped hole 921.

[0049] Further, there is always a connection between the second round hole 931 and the first round hole 911 through the strip-shaped hole 921. When the first round plate 91 and the second round plate 92 rotate, the second round hole 931 remains in the same position and is still in communication with the first round hole 911 through the strip-shaped hole 921.

[0050] Inside the round tube 61, there is a first air distribution valve 62. The first air distribution valve 62 is provided with an air inlet pipe 64 and a plurality of distribution pipes 63. The plurality of distribution pipes 63 are respectively connected to the corresponding first chamber 74, second chamber 75, third chamber 76 and fourth chamber 77. The air inlet pipe 64 penetrates through the round box 5 and is connected to the first air supply pipe 3 through a second conduit 31.

[0051] Further, when the first air supply pipe 3 is connected to a compressed gas cylinder storing dilution gas through a pipeline, the dilution gas in the compressed gas cylinder can be discharged equally through the plurality of distribution pipes 63 by the first air distribution valve 62. And before mixing the dilution gas and the detection gas later, the first air distribution valve 62 will discharge the dilution gas through the plurality of distribution pipes 63, ensuring that when discharging the reference gas after mixing, the dilution gas will not be discharged through the distribution pipes 63.

[0052] In this embodiment: during use, compressed gas cylinders storing four kinds of detection gases are respectively connected to the four second air supply pipes 4 through pipelines, and then the compressed gas cylinder storing dilution gas is connected to the first air supply pipe 3 through a pipeline;

[0053] The dilution gas enters the first air distribution valve 62 through the first air supply pipe 3, the second conduit 31 and the air inlet pipe 64 and then is discharged equally through the plurality of distribution pipes 63, ensuring that the amount of dilution gas entering each of the first chamber 74, second chamber 75, third chamber 76 and fourth chamber 77 is the same;

[0054] After the detection gas is discharged through the second air supply pipe 4, it will enter the four rigid pipes 78 respectively through the cooperation of the first gas distributor 710. Then, according to the distribution of the four flow control valves 79, the amount of detection gas transported by the four flow control valves 79 into the first chamber 74, second chamber 75, third chamber 76 and fourth chamber 77 is different;

[0055] Since the amount of dilution gas entering the first chamber 74, second chamber 75, third chamber 76 and fourth chamber 77 is the same, while the content of the detection gas entering them is different, the same detection gas will be diluted into reference gases with different concentrations in the first chamber 74, second chamber 75, third chamber 76 and fourth chamber 77 of the same dilution mechanism 7;

[0056] S1. When calibrating the gas detector device for a single gas with different concentrations, direct the detection port of the gas detector device towards the air outlet pipe 2. Then, first control the corresponding first electric push rod 711 to extend. The extended first electric push rod 711 pushes the first partition plate 71 towards the sector plate 65. At this time, the fourth chamber 77 will be compressed, and the reference gas in the fourth chamber 77 will be discharged through the corresponding fourth straight pipe 84, and then discharged through the gas distributor II 85, the one-way exhaust valve 86 and the first connector 87 in sequence. Then, the reference gas in the fourth chamber 77 will pass through the conversion mechanism 9, the first conduit 21 and finally be discharged from the air outlet pipe 2 and blown towards the detection port of the gas detector device;

[0057] S2. By controlling the corresponding first electric push rod 711 to contract, the contracted first electric push rod 711 pulls the first partition plate 71 towards the second partition plate 72. At this time, the third chamber 76 will be compressed, and the reference gas in the third chamber 76 will be discharged through the corresponding third straight pipe 83, and then discharged through the gas distributor II 85, the one-way exhaust valve 86 and the first connector 87 in sequence. Then, the reference gas in the fourth chamber 77 will pass through the conversion mechanism 9, the first conduit 21 and finally be discharged from the air outlet pipe 2 and blown towards the detection port of the gas detector device;

[0058] S3. By controlling the corresponding second electric push rod 712 to extend, the extended second electric push rod 712 pushes the third partition plate 73 towards the second partition plate 72. At this time, the second chamber 75 will be compressed, and the reference gas in the second chamber 75 will be discharged through the corresponding second straight pipe 82, and then discharged through the gas distributor II 85, the one-way exhaust valve 86 and the first connector 87 in sequence. Then, the reference gas in the fourth chamber 77 will pass through the conversion mechanism 9, the first conduit 21 and finally be discharged from the air outlet pipe 2 and blown towards the detection port of the gas detector device;

[0059] S4. By controlling the corresponding second electric push rod 712 to contract, the contracted second electric push rod 712 pulls the third partition plate 73 away from the second partition plate 72. At this time, the first chamber 74 will be compressed, and the reference gas in the first chamber 74 will be discharged through the corresponding first straight pipe 81, and then discharged through the gas distributor II 85, the one-way exhaust valve 86 and the first connector 87 in sequence. Then, the reference gas in the fourth chamber 77 will pass through the conversion mechanism 9, the first conduit 21 and finally be discharged from the air outlet pipe 2 and blown towards the detection port of the gas detector device;

[0060] From the combination of S1 - S4, by controlling the telescopic movement of the first electric push rod 711 and the second electric push rod 712 on a dilution mechanism 7, the reference gases with different concentrations in the first chamber 74, the second chamber 75, the third chamber 76, and the fourth chamber 77 can be discharged through the gas distribution mechanism 8 and the conversion mechanism 9 and blown through the outlet pipe 2 towards the detection port of the gas detector device. Finally, different purity detections and calibrations of a single detection gas can be carried out for the gas detector device. The concentration of the reference gas in the first chamber 74, the second chamber 75, the third chamber 76, and the fourth chamber 77 is: the number of detection gases / (the number of detection gases + the number of dilution gases);

[0061] When it is necessary to perform detection and calibration of different detection gases on the gas detector device, the motor 96 can be controlled to drive the gear 97 to rotate. The gear 97 then drives the fixed ring 94, the second circular plate 92, and the first circular plate 91 to rotate through the external gear ring 95. The rotating first circular plate 91 will cause the first circular hole 911 to be sequentially communicated with the first connectors 87 on the four gas distribution mechanisms 8. When it is necessary to use different detection gases to perform detection and calibration on the gas detector device, it is only necessary to make the first circular hole 911 communicate with the first connector 87 on the corresponding gas distribution mechanism 8. At this time, the detection gas in the corresponding dilution mechanism 7 can be transported to the first circular hole 911 through the corresponding gas distribution mechanism 8.

[0062] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An automated proportioning device for standard gas dilution, comprising a housing (1), characterized in that: An air outlet pipe (2) is fixedly installed in a penetrating manner on the front side of the housing (1). A first air supply pipe (3) and four second air supply pipes (4) distributed in a rectangle are fixedly installed in a penetrating manner on the rear side of the housing (1). A circular box (5) is fixedly installed inside the housing (1). An air supply mechanism (6) is arranged inside the circular box (5). The air supply mechanism (6) divides the interior of the circular box (5) into four dilution mechanisms (7). The four dilution mechanisms (7) are respectively communicated with the corresponding second air supply pipes (4). A conversion mechanism (9) and four air distribution mechanisms (8) distributed in a rectangle are arranged between the four dilution mechanisms (7) and the air outlet pipe (2). The air supply mechanism (6) is used for uniformly distributing dilution gas to the four dilution mechanisms (7) and mixing it with the detection gas inside the dilution mechanisms (7) to form reference gas with different concentrations. The conversion mechanism (9) and the four air distribution mechanisms (8) cooperate to transport the reference gas inside different dilution mechanisms (7) into the air outlet pipe (2) and discharge it through the air outlet pipe (2); The air supply mechanism (6) includes a circular pipe (61) fixedly connected to the inner wall of the circular box (5). Four rectangular plates (66) distributed in a rectangle are fixedly installed between the outer side surface of the circular pipe (61) and the inner wall of the circular box (5). The same sector plate (65) is fixedly installed between two adjacent rectangular plates (66); The dilution mechanism (7) includes a first partition plate (71), a second partition plate (72) and a third partition plate (73) arranged between two rectangular plates (66). The first partition plate (71), the second partition plate (72) and the third partition plate (73) are located on the side of the sector plate (65) away from the air outlet pipe (2). The first partition plate (71), the second partition plate (72) and the third partition plate (73) cooperate with the sector plate (65) and the two rectangular plates (66) to divide the interior of the circular box (5) into a first chamber (74), a second chamber (75), a third chamber (76) and a fourth chamber (77); The dilution mechanism (7) further includes four rigid pipes (78). The four rigid pipes (78) all penetrate through the circular box (5) and are respectively communicated with the interiors of the first chamber (74), the second chamber (75), the third chamber (76) and the fourth chamber (77). Flow control valves (79) are arranged on the four rigid pipes (78). The four rigid pipes (78) are connected to the corresponding second air supply pipes (4) through the same gas distributor one (710); After the detection gas is discharged through the second air supply pipe (4), it will enter the four rigid pipes (78) respectively through the cooperation of the gas distributor one (710). Then, according to the distribution of the four flow control valves (79), the number of detection gases transported by the four flow control valves (79) into the first chamber (74), the second chamber (75), the third chamber (76) and the fourth chamber (77) is different; Since the amount of dilution gas entering chambers one (74), two (75), three (76), and four (77) is the same, while the content of the detection gas entering them is different, the same detection gas will be diluted into reference gases with different concentrations in chambers one (74), two (75), three (76), and four (77) of the same dilution mechanism (7). The gas distribution mechanism (8) includes a straight pipe one (81), a straight pipe two (82), a straight pipe three (83), and a straight pipe four (84) that penetrate the fan-shaped plate (65) and are fixedly connected to the fan-shaped plate (65). One end of the straight pipe one (81), the straight pipe two (82), the straight pipe three (83), and the straight pipe four (84) close to the conversion mechanism (9) is connected to the same gas distributor two (85). A one-way exhaust valve (86) is connected to the gas distributor two (85). The conversion mechanism (9) includes a circular plate four (99) fixedly connected to the inner wall of the circular box (5). Four circular holes three (991) are arranged in a rectangular distribution on the circular plate four (99). Connecting heads one (87) are fixedly installed in the four circular holes three (991). The four connecting heads one (87) are respectively connected to the corresponding one-way exhaust valves (86). The conversion mechanism (9) further includes a circular plate one (91) that is attached to and slidably connected to the circular plate four (99). The circular plate one (91) is rotatably connected to the inner wall of the circular box (5). One side of the circular plate one (91) away from the circular plate four (99) extends outside the circular box (5) and is fixedly installed with a circular plate two (92). A circular plate three (93) is rotatably installed on one side of the circular plate two (92) away from the circular plate one (91). A strip-shaped hole (921) is opened on the circular plate two (92). A circular hole one (911) is opened on the circular plate one (91). The circular hole one (911) and a circular hole two (931) are connected through the strip-shaped hole (921). When it is necessary to calibrate the gas detector device with different detection gases, the rotating circular plate one (91) will enable the circular hole one (911) to communicate with the connecting heads one (87) on the four gas distribution mechanisms (8) in sequence. When it is necessary to use different detection gases to calibrate the gas detector device, it is only necessary to make the circular hole one (911) communicate with the connecting head one (87) on the corresponding gas distribution mechanism (8).

2. The automatic proportioning device for standard gas dilution according to claim 1, characterized in that: One side of the circular box (5) close to the air outlet pipe (2) is open. The circular pipe (61) and the fan-shaped plate (65) are both coaxially arranged with the circular box (5), and their inner side walls are fixedly connected to the circular pipe (61).

3. The automatic proportioning device for diluting standard gas according to claim 1, characterized in that: The partition two (72) is fixedly connected to the inner wall of the circular box (5) and to the circular pipe (61) and two rectangular plates (66). The partition one (71) and the partition three (73) are slidably connected to the inner wall of the circular box (5) and to the circular pipe (61) and two rectangular plates (66).

4. An automated proportioning device for diluting standard gas according to claim 1, characterized in that: The dilution mechanism (7) further includes a first electric push rod (711) and a second electric push rod (712) fixedly connected to one side of the circular box (5) close to the first gas supply pipe (3). The piston rod of the first electric push rod (711) slidably penetrates through the circular box (5), the second partition plate (72), the third partition plate (73) and is fixedly connected to the first partition plate (71). The piston rod of the second electric push rod (7) slidably penetrates through the circular box (5) and is fixedly connected to the third partition plate (73).

5. The automatic proportioning device for standard gas dilution according to claim 1, characterized in that: The first straight pipe (81) penetrates through the first partition plate (71), the second partition plate (72) and the third partition plate (73) and is slidably connected to the first partition plate (71), the second partition plate (72) and the third partition plate (73), and the first straight pipe (81) communicates with the first chamber (74). The second straight pipe (82) penetrates through the first partition plate (71) and the second partition plate (72) and is slidably connected to the first partition plate (71) and the second partition plate (72), and the second straight pipe (82) communicates with the second chamber (75). The third straight pipe (83) penetrates through the first partition plate (71) and is slidably connected to the first partition plate (71), and the third straight pipe (83) communicates with the third chamber (76). The fourth straight pipe (84) communicates with the fourth chamber (77).

6. The automatic proportioning device for diluting standard gas according to claim 1, wherein: A fixing ring (94) is fixedly sleeved on the side surface of the second circular plate (92) and the part of the first circular plate (91) outside the circular box (5). An external gear ring (95) is fixedly sleeved on the fixing ring (94). The conversion mechanism (9) further includes a motor (96) fixed on the outside of the circular box (5). A gear (97) meshing with the external gear ring (95) is fixed on the output shaft of the motor (96). A second circular hole (931) is formed in the third circular plate (93). A second connector (910) is fixedly installed in the second circular hole (931). The second connector (910) and the air outlet pipe (2) are connected by a first conduit (21). The third circular plate (93) and the circular box (5) are fixedly connected by a plurality of connecting frames (98).

7. An automatic proportioning device for diluting standard gas according to claim 1, characterized in that: A first gas distribution valve (62) is arranged inside the circular pipe (61). The first gas distribution valve (62) is provided with an air inlet pipe (64) and a plurality of distribution pipes (63). The plurality of distribution pipes (63) communicate with the corresponding first chamber (74), second chamber (75), third chamber (76) and fourth chamber (77) respectively. The air inlet pipe (64) penetrates through the circular box (5) and is connected to the first gas supply pipe (3) by a second conduit (31).

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