Automatic proportioning equipment for standard gas dilution

Abstract

The invention belongs to the technical field of gas dilution proportioning, and particularly relates to standard gas dilution automatic proportioning equipment which comprises a shell, a gas outlet pipe is fixedly installed on the front side of the shell in a penetrating mode, and a first gas supply pipe and four second gas supply pipes distributed in a rectangular mode are fixedly installed on the rear side of the shell in a penetrating mode. A round box is fixedly installed in the shell, an air supply mechanism is arranged in the round box, the air supply mechanism divides the interior of the round box into four dilution mechanisms, and the four dilution mechanisms are communicated with the corresponding second air supply pipes respectively. According to the invention, four detection gases are diluted with different concentrations by using one dilution gas, so that the cost of purchasing standard gases can be reduced, the detection process of repeatedly switching sites is not required to be manually carried out, and one person can carry out corresponding detection and calibration on gas detector equipment by using four gases with different concentrations; and the conditions of missing detection and repeated detection are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of gas dilution ratio, and particularly 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 it is also used for the detection of various combustible gases, toxic and harmful gases, and volatile gases. For example, the 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 have situations of missed 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 shortcomings 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 scheme: 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, and a first air supply pipe and four second air supply pipes distributed in a rectangular shape are fixedly installed through the rear side of the housing. A circular box is fixedly installed inside the housing. An air supply mechanism is arranged inside the circular box. The air 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 rectangular shape are arranged between the four dilution mechanisms and the air outlet pipe. The air supply mechanism is used for evenly distributing the dilution gas to the four dilution mechanisms and mixing it with the detection gas inside the dilution mechanisms to form benchmark gases with different concentrations. The conversion mechanism and the four gas distribution mechanisms cooperate to transport the benchmark gases inside different dilution mechanisms into the air outlet pipe and discharge them 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 surface 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 four rigid pipes 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, the partition plate three and is fixedly connected to the partition plate one, and 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 penetrating the sector plate and fixedly connected to the sector plate; 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; 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; 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, and the straight pipe four is connected to the chamber four.

[0012] Preferably, one end of the straight pipe one, the straight pipe two, the straight pipe three, and the straight pipe four close to the conversion mechanism is connected to the same gas distributor two. A one-way exhaust valve is connected to the gas distributor two. The conversion mechanism includes a circular plate four fixedly connected to the inner wall of the circular box. Four circular holes three are arranged on the circular plate four in a rectangular distribution. A connector one is fixedly installed in each of the four circular holes three. The four connector ones are respectively connected to the corresponding one-way exhaust valves.

[0013] Preferably, the conversion mechanism further includes a first circular plate that is in four-sided contact with 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 second circular hole is formed in the third circular plate, and a second connector is fixedly installed in the second circular hole. The second connector and the air outlet pipe are connected through a first conduit. The third circular plate is fixedly connected to the circular box through a plurality of connecting frames.

[0014] Preferably, a strip-shaped hole is formed in the second circular plate, and a first circular hole is formed in the first circular plate. The first circular hole and the second circular hole are communicated through the strip-shaped hole.

[0015] Preferably, an air distribution valve I is provided inside the circular tube. The air distribution valve I is provided with an air inlet pipe and a plurality of distribution pipes. 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 through a second conduit.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 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 eliminate the need for manual detection processes that require multiple site 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of an automatic proportioning device for standard gas dilution proposed by the present invention Figure 1 ; Figure 2 is a schematic diagram of the overall structure of an automatic proportioning device for standard gas dilution proposed by the present invention Figure 2 ; Figure 3 is a schematic diagram of the overall side sectional view of an automatic proportioning device for standard gas dilution proposed by the present invention; Figure 4 is a partial side sectional view of an automatic proportioning device for standard gas dilution proposed by the present invention Figure 1 ; Figure 5 is a partial side sectional view of an automatic proportioning device for standard gas dilution proposed by the present invention Figure 2 ; Figure 6 This is a partial side sectional view of the circular box and the conversion mechanism in an automatic proportioning device for diluting standard gases proposed by the present invention; Figure 7 This is a partial exploded view of the conversion mechanism in an automatic proportioning device for diluting standard gases proposed by the present invention; Figure 8 This is a partial structural schematic diagram of the circular box, the gas supply mechanism, and the dilution mechanism in an automatic proportioning device for diluting standard gases proposed by the present invention.

[0018] 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. Circular box; 6. Gas supply mechanism; 61. Circular 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. Strip-shaped hole; 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. Specific embodiments

[0019] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. 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.

[0020] Please refer to Figures 1 - 8, the present invention provides a technical solution: a standard gas dilution automatic proportioning device, which includes 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 to evenly distribute the dilution gas to the four dilution mechanisms 7 and mix 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.

[0021] 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 their purities are all 99.99%. The dilution mechanism 7 can dilute CH4, CO, O2, and H2S into four different concentrations through N2.

[0022] 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 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.

[0023] 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.

[0024] The second partition plate 72 is fixedly connected to the inner wall of the circular box 5 and fixedly connected to the circular pipe 61 and the two rectangular plates 66. The first partition plate 71 and the third partition plate 73 are slidably connected to the inner wall of the circular box 5 and slidably connected to the circular pipe 61 and the two rectangular plates 66. The dilution mechanism 7 further includes four rigid pipes 78. The four rigid pipes 78 all penetrate 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, and the four rigid pipes 78 are connected to the corresponding second gas supply pipes 4 through the same first gas distributor 710.

[0025] Further, the flow control valve 79 can control the amount of gas discharged from the rigid pipe 78. 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 pipes 78 by the first gas distributor 710. Then, by controlling the amount of detecting gas discharged from the rigid pipe 78 through the flow control valve 79, it can be controlled that the detecting gas in the same compressed gas cylinder can be divided into different amounts and enter the first chamber 74, the second chamber 75, the third chamber 76, and the fourth chamber 77.

[0026] 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 air supply pipe 3. The piston rod of the first electric push rod 711 slidably penetrates 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 712 slidably penetrates the circular box 5 and is fixedly connected to the third partition plate 73.

[0027] The gas distribution mechanism 8 includes a first straight pipe 81, a second straight pipe 82, a third straight pipe 83 and a fourth straight pipe 84 that penetrate and are fixedly connected to the sector plate 65; The first straight pipe 81 penetrates 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 is communicated with the first chamber 74; The second straight pipe 82 penetrates 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 is communicated with the second chamber 75; The third straight pipe 83 penetrates the first partition plate 71 and is slidably connected to the first partition plate 71, and the third straight pipe 83 is communicated with the third chamber 76. The fourth straight pipe 84 is communicated with the fourth chamber 77.

[0028] Further, the first straight pipe 81 completely penetrates the third partition plate 73 and is adjacent to the inner wall of the side of the circular box 5 away from the opening, and the distance between the end of the first straight pipe 81 and the inner wall of the circular box 5 is less than the thickness of the third partition plate 73, ensuring that when the flow control valve 79 fits against the inner wall of the circular box 5, the first straight pipe 81 will not be separated from the third partition plate 73; The third straight pipe 83 completely penetrates the first partition plate 71 and is adjacent to the second partition plate 72, and the distance between the end of the third straight pipe 83 and the inner wall of the second partition plate 72 is less than the thickness of the first partition plate 71, ensuring that when the first partition plate 71 and the second partition plate 72 fit together, the first partition plate 71 will not be separated from the third straight pipe 83; The ends of the second straight pipe 82 and the fourth straight pipe 84 are flush with the second partition plate 72 and the sector plate 65 respectively, ensuring that the second chamber 75 and the fourth chamber 77 can be completely compressed.

[0029] One end of the first straight pipe 81, the second straight pipe 82, the third straight pipe 83 and the fourth straight pipe 84 close to the conversion mechanism 9 are connected to the same second gas distributor 85. A one-way exhaust valve 86 is connected to the second gas distributor 85. The conversion mechanism 9 includes a fourth circular plate 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 fourth circular plate 99. A first connector 87 is fixedly installed in each of the four circular holes three 991. The four first connectors 87 are respectively connected to the corresponding one-way exhaust valves 86.

[0030] The conversion mechanism 9 further includes a first circular plate 91 that is attached to and slidably connected to the fourth circular plate 99, and the first circular plate 91 is rotatably connected to the inner wall of the circular box 5. One side of the first circular plate 91 away from the fourth circular plate 99 extends outside the circular box 5 and is fixedly installed with a second circular plate 92. A third circular plate 93 is rotatably installed on one side of the second circular plate 92 away from the first circular plate 91. 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 located 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 outside 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 through a first conduit 21. The third circular plate 93 is fixedly connected to the circular box 5 through a plurality of connecting frames 98.

[0031] Further, start the motor 96 to drive the gear 97 to rotate. The gear 97 then drives the fixing 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 make the first circular hole 911 coaxial with different third circular holes 991 and in a communicating state with the corresponding first connectors 87, and each time the external gear ring 95 rotates by an angle of 90 degrees.

[0032] A strip-shaped hole 921 is formed in the second circular plate 92. A first circular hole 911 is formed in the first circular plate 91. The first circular hole 911 and the second circular hole 931 are connected through the strip-shaped hole 921.

[0033] Further, the second circular hole 931 and the first circular hole 911 are always connected through the strip-shaped hole 921. When the first circular plate 91 and the second circular plate 92 rotate, the second circular hole 931 remains in the same position and is still in a communicating state with the first circular hole 911 through the strip-shaped hole 921.

[0034] A first gas distribution valve 62 is arranged inside the circular pipe 61. An air inlet pipe 64 and a plurality of distribution pipes 63 are arranged on the first gas distribution valve 62. 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 circular box 5 and is connected to the first air supply pipe 3 through a second conduit 31.

[0035] Further, when the air supply pipe 1 is connected to a compressed gas cylinder storing dilution gas through a pipeline, the dilution gas in the compressed gas cylinder can be discharged in equal amounts through a plurality of distribution pipes 63 by the first air distribution valve 62. And before mixing the dilution gas and the detection gas, the first air distribution valve 62 will discharge the dilution gas through the plurality of distribution pipes 63, ensuring that when the reference gas after mixing is discharged, the dilution gas will not be discharged through the distribution pipes 63.

[0036] In this embodiment: during use, the 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 the dilution gas is connected to the first air supply pipe 3 through a pipeline; The dilution gas enters the first air distribution valve 62 through the first air supply pipe 3, the second conduit 31 and the intake pipe 64 and then is discharged in equal amounts through a plurality of distribution pipes 63, ensuring that the amount of dilution gas entering each of the first chamber 74, the second chamber 75, the third chamber 76 and the fourth chamber 77 is the same; 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 delivered to the first chamber 74, the second chamber 75, the third chamber 76 and the fourth chamber 77 by the four flow control valves 79 is different; Since the amount of dilution gas entering the first chamber 74, the second chamber 75, the third chamber 76 and the fourth chamber 77 is the same, but 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, the second chamber 75, the third chamber 76 and the fourth chamber 77 of the same dilution mechanism 7; S1. When calibrating the gas detector device for a single gas with different concentrations, the detection port of the gas detector device is directed towards the outlet pipe 2. Then, the corresponding first electric push rod 711 can be controlled to extend. The extended first electric push rod 711 pushes the first partition 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 will be discharged through the second gas distributor 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 outlet pipe 2 and blown towards the detection port of the gas detector device; S2. By controlling the corresponding first electric push rod 711 to contract, the contracted first electric push rod 711 pulls the first partition 71 towards the second partition 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 will be discharged through the second gas distributor 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 outlet pipe 2 and blown towards the detection port of the gas detector device; 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, one-way exhaust valve 86 and connector I 87 in sequence. After that, the reference gas in the fourth chamber 77 will pass through the conversion mechanism 9, conduit I 21 and finally be discharged from the air outlet pipe 2 and blown towards the detection port of the gas detector device; 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, one-way exhaust valve 86 and connector I 87 in sequence. After that, the reference gas in the fourth chamber 77 will pass through the conversion mechanism 9, conduit I 21 and finally be discharged from the air outlet pipe 2 and blown towards the detection port of the gas detector device; It can be seen from S1 - S4 that by controlling the corresponding expansion and contraction 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 towards the detection port of the gas detector device through the air outlet pipe 2. Finally, the gas detector device can be calibrated for different purities of a single detection gas. 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); When it is necessary to calibrate the gas detector device for different detection gases, 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 enable the circular hole 911 to be sequentially communicated with the connectors I 87 on the four gas distribution mechanisms 8. When it is necessary to calibrate the gas detector device with different detection gases, it is only necessary to make the circular hole 911 communicate with the connector I 87 on the corresponding gas distribution mechanism 8. At this time, the detection gas in the corresponding dilution mechanism 7 can be transported into the circular hole 911 through the corresponding gas distribution mechanism 8.

[0037] 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 and inventive concept of the present invention, 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 evenly 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).

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

3. An automated proportioning device for diluting standard gas according to claim 2, characterized in that: 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) 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).

4. An automatic proportioning device for diluting standard gas according to claim 3, characterized in that: The second partition plate (72) is fixedly connected to the inner wall of the circular box (5), the circular pipe (61) and the two rectangular plates (66). The first partition plate (71) and the third partition plate (73) are slidably connected to the inner wall of the circular box (5), the circular pipe (61) and the two rectangular plates (66). 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), and the four rigid pipes (78) are connected to the corresponding second air supply pipes (4) through the same gas distributor one (710).

5. An automated proportioning device for diluting standard gas according to claim 3, 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 air 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 (712) slidably penetrates through the circular box (5) and is fixedly connected to the third partition plate (73).

6. The automatic proportioning device for standard gas dilution according to claim 2, wherein: The gas distribution mechanism (8) includes a first straight pipe (81), a second straight pipe (82), a third straight pipe (83) and a fourth straight pipe (84) that penetrate through the sector plate (65) and are fixedly connected to the sector plate (65); 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).

7. An automated proportioning device for diluting standard gases according to claim 6, characterized in that: One end of the first straight pipe (81), the second straight pipe (82), the third straight pipe (83) and the fourth straight pipe (84) close to the conversion mechanism (9) are connected to the same second gas distributor (85). A one-way exhaust valve (86) is connected to the second gas distributor (85). The conversion mechanism (9) includes a fourth circular plate (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 fourth circular plate (99). A first connector (87) is fixedly installed in each of the four circular holes three (991). The four first connectors (87) are respectively connected to the corresponding one-way exhaust valves (86).

8. An automatic proportioning device for standard gas dilution according to claim 7, characterized in that: The conversion mechanism (9) further includes a first circular plate (91) that is attached to and slidably connected to the fourth circular plate (99), and the first circular plate (91) is rotatably connected to the inner wall of the circular box (5). One side of the first circular plate (91) away from the fourth circular plate (99) extends outside the circular box (5) and is fixedly installed with a second circular plate (92). A third circular plate (93) is rotatably installed on one side of the second circular plate (92) away from the first circular plate (91). A same 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) located 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), and 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).

9. An automated proportioning device for diluting standard gas according to claim 8, characterized in that: A strip-shaped hole (921) is formed in the second circular plate (92), and a first circular hole (911) is formed in the first circular plate (91). The first circular hole (911) and the second circular hole (931) are communicated through the strip-shaped hole (921).

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

Images