Portable standard gas dilution device

Abstract

A portable standard gas diluting device belongs to the technical field of gas diluting equipment and comprises a box body, a detection connector is fixedly mounted on the front surface of the box body, a zero gas connector and a standard gas connector are mounted on the rear surface of the box body, a mixing container is mounted in the box body, an S-shaped channel is arranged in the mixing container, and a gas outlet is formed in the S-shaped channel. A zero gas inlet and a standard gas inlet are formed in the rear surface of the mixing container in a penetrating mode, a conveying pipe B is connected between the zero gas inlet and the zero gas connector, a diluted gas exhaust port is formed in the front surface of the mixing container in a penetrating mode, a conveying pipe A is connected between the diluted gas exhaust port and the detection connector, and an S-shaped pipeline is fixedly installed in the S-shaped channel. A plurality of through holes are formed in the lower surface of the S-shaped pipeline at equal intervals in a penetrating mode, the front end of the S-shaped pipeline is connected with the exhaust end of the standard gas inlet in a sealed mode, and a conveying pipe C is connected between the standard gas inlet and the standard gas connector.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas dilution equipment, and particularly relates to a portable standard gas dilution device. Background Art

[0002] In many fields such as modern industrial production, environmental monitoring, and scientific research, the demand for accurate and reliable gas concentration measurement and analysis is increasing day by day. As a gas sample with a known concentration, standard gas plays a crucial role in the process of gas analysis and calibration. In order to meet the demand for standard gas with a specific concentration in different application scenarios, the standard gas dilution device came into being.

[0003] After retrieval, the authorized patent with the publication number of CN214844374U and the patent name of "A Portable Standard Gas Dilution Device" in the related field has a specific structure including a casing, which includes an upper casing, a lower casing, a front panel, and a rear panel; a flip cover is provided on the upper casing; the upper casing and the lower casing are mutually clamped to form an annular structure; the front panel and the rear panel are respectively arranged at the notches on both sides of the annular structure; a support plate is provided inside the casing; a gas mixing container is provided on the support plate; a standard gas storage container and a zero gas storage container are respectively communicated on both sides of the gas mixing container; an analytical instrument for analyzing the mixed gas in the gas mixing container is provided on the inner side of the front panel; buffer devices are symmetrically arranged between the support plate and the casing.

[0004] The current portable standard gas dilution device has deficiencies in gas mixing. Its mixing container adopts a cavity structure. When two gases to be mixed flow into this container, due to the lack of an effective mixing guiding mechanism, the gas often flows directly towards the detection port direction. This flow pattern results in insufficient residence time of the gas in the mixing container, and the gas cannot fully undergo molecular diffusion and turbulent mixing, thus leading to uneven mixing. The unevenly mixed gas directly affects the accuracy of subsequent detection data. Since the detection result is based on the overall characteristics of the mixed gas, uneven mixing will cause the detected value to deviate from the true value and cannot accurately reflect the actual gas concentration and composition.

[0005] Therefore, another portable standard gas dilution device is provided specifically to solve the above technical problems. Content of the Utility Model

[0006] In view of the problem in the prior art that the gas mixing and dilution in the portable standard gas dilution device are uneven, which affects the accuracy of subsequent detection data, the present utility model provides a portable standard gas dilution device. By arranging an S-shaped channel in the mixing container and configuring an S-shaped pipe with multiple openings in the S-shaped channel, the zero gas is transported in the S-shaped channel, and the transportation speed can be reduced; the standard gas is transported through the S-shaped pipe. During the transportation process, the standard gas uniformly contacts and mixes with the zero gas in the S-shaped channel through the openings at different positions, thereby achieving a more uniform mixing purpose. This can ensure that the detection data is more accurate and error-free when the mixed gas is detected, effectively solving the problems of uneven gas mixing and dilution and affecting the accuracy of subsequent detection data in the portable standard gas dilution device in the prior art. The specific technical solution is as follows:

[0007] A portable standard gas dilution device includes a box body with two handles provided on the front surface. A detection connector is fixedly installed on the front surface of the box body. A zero gas connector and a standard gas connector are fixedly installed on the rear surface of the box body. A mixing container is fixedly installed inside the box body. An S-shaped channel is arranged inside the mixing container. A zero gas inlet and a standard gas inlet are penetrated and opened on the rear surface of the mixing container. A delivery pipe B is connected between the zero gas inlet and the zero gas connector. A dilution gas discharge port is penetrated and opened on the front surface of the mixing container. A delivery pipe A is connected between the dilution gas discharge port and the detection connector;

[0008] An S-shaped pipe is fixedly installed inside the S-shaped channel. A plurality of openings are penetrated at equal intervals on the lower surface of the S-shaped pipe. The front end of the S-shaped pipe is hermetically connected to the exhaust end of the standard gas inlet. The rear end of the S-shaped pipe is in a sealed state. A delivery pipe C is connected between the standard gas inlet and the standard gas connector.

[0009] In the above technical solution, a PLC control circuit board is fixedly installed inside the box body. A touch control screen is fixedly installed by embedding on the front surface of the box body. A flow controller main body and a solenoid valve main body are installed inside each of the delivery pipe A, the delivery pipe B, and the delivery pipe C. The touch control screen, the PLC control circuit board, the flow controller main body, and the solenoid valve main body are electrically connected;

[0010] In the above technical solution, a variable voltage power supply is fixedly installed inside the box body. The variable voltage power supply is electrically connected to the touch control screen, the PLC control circuit board, the flow controller main body, and the solenoid valve main body. A power supply line connection end and a switch are provided on the rear surface of the box body. The power supply line connection end and the switch are both electrically connected to the variable voltage power supply;

[0011] In the above technical solution, a maintenance opening is provided on the upper surface of the box body. Slots are provided on both sides of the upper surface of the box body. A cover plate is inserted and installed between the two slots. The cover plate completely covers the maintenance opening, and bolts are screwed and installed between the cover plate and the box body.

[0012] In the above technical solution, magnetic covers are magnetically installed on the front and rear surfaces of the box body. The front magnetic cover is used to seal the zero gas connector and the calibration gas connector, and the rear magnetic cover is used to seal the detection connector.

[0013] A portable standard gas dilution device of the present utility model has the following beneficial effects compared with the prior art:

[0014] First, by providing an S-shaped channel in the mixing container and configuring an S-shaped pipe with multiple openings in the S-shaped channel in the present utility model, zero gas is transported in the S-shaped channel, which can reduce the transportation speed; calibration gas is transported through the S-shaped pipe. During the transportation process, the calibration gas uniformly contacts and mixes with the zero gas in the S-shaped channel through openings at different positions, thereby achieving a more uniform mixing purpose. This can ensure that the detection data is more accurate and error-free when the mixed gas is detected.

[0015] Second, by separately providing a detection connector, a zero gas connector, and a calibration gas connector, the present utility model can be used in cooperation with external gas pipes to connect corresponding gas cylinders and gas detection devices. Compared with the existing dilution devices, the structure of the internal self-contained gas cylinder is removed, making the whole more lightweight, portable, and more convenient and labor-saving to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view structural schematic diagram of the present utility model.

[0017] Figure 2 It is a rear view structural schematic diagram of the present utility model.

[0018] Figure 3 It is an exploded structural schematic diagram of the present utility model.

[0019] Figure 4 It is a sectional structural schematic diagram of the housing of the present utility model.

[0020] Figure 5 It is a sectional structural schematic diagram of the present utility model.

[0021] Figure 6 It is a sectional structural schematic diagram of the mixing chamber of the present utility model.

[0022] Figure 7 It is a connection schematic diagram of the electronic components of the present utility model.

[0023] Figure 1-7Among them: 1. Box body; 11. Detection connector; 111. Delivery pipe A; 12. Zero-air connector; 121. Delivery pipe B; 13. Standard-gas connector; 131. Delivery pipe C; 14. Slot; 15. Cover plate; 16. Bolt; 2. Mixing container; 21. S-shaped channel; 211. Zero-air inlet; 212. Standard-gas inlet; 22. Dilution-gas discharge port; 3. S-shaped pipe; 31. Through port; 4. Variable-voltage power supply; 41. PLC control circuit board; 5. Touch control screen; 6. Magnetic cover; 7. Power cord connection end; 8. Switch. Specific implementation manner

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] The front, rear, left, right, top and bottom in this embodiment are described with Figure 1 as the reference plane. Please refer to Figure 1 - Figure 7 and the present invention provides a technical solution:

[0026] A portable standard-gas dilution device includes a box body 1 with two handles provided on the front surface. A detection connector 11 is fixedly installed on the front surface of the box body 1. A zero-air connector 12 and a standard-gas connector 13 are fixedly installed on the rear surface of the box body 1. A mixing container 2 is fixedly installed inside the box body 1. An S-shaped channel 21 is provided inside the mixing container 2. A zero-air inlet 211 and a standard-gas inlet 212 are respectively and penetratingly opened on the rear surface of the mixing container 2. A delivery pipe B 121 is connected between the zero-air inlet 211 and the zero-air connector 12. A dilution-gas discharge port 22 is penetratingly opened on the front surface of the mixing container 2. A delivery pipe A 111 is connected between the dilution-gas discharge port 22 and the detection connector 11. An S-shaped pipe 3 is fixedly installed inside the S-shaped channel 21. A plurality of through ports 31 are equidistantly and penetratingly opened on the lower surface of the S-shaped pipe 3. The front end of the S-shaped pipe 3 is hermetically connected to the exhaust end of the standard-gas inlet 212. The rear end of the S-shaped pipe 3 is in a sealed state. A delivery pipe C 131 is connected between the standard-gas inlet 212 and the standard-gas connector 13;

[0027] In use, connect the standard gas cylinder to be diluted to the standard gas connector 13 through an external gas pipe, and connect the zero gas cylinder for dilution to the zero gas connector 12 through an external gas pipe. Then, connect a gas detection device to the detection connector 11. Next, open the standard gas cylinder and the zero gas cylinder, and appropriately transport them into the mixing container 2. The zero gas enters the S-shaped channel 21 through the delivery pipe B121, and the standard gas enters the S-shaped pipe 3 through the delivery pipe C131 and enters the S-shaped channel 21 through the through port 31 to be mixed with the zero gas. Due to the special channel arrangement in the mixing container 2, the flow rates of the zero gas and the standard gas can be slowed down, and the mixing time of the two can be extended, so that the gas mixing and dilution are more uniform. The diluted gas is discharged from the dilution gas discharge port 22 and discharged from the detection connector 11 through the delivery pipe A111. At this time, the diluted gas can be detected by the gas detection device. Compared with the prior art, this dilution device can make the gas more uniform during dilution and mixing, and can effectively ensure the accuracy of the detection data.

[0028] To facilitate the use of this device to achieve the flow rate reduction control of the transported standard gas and zero gas, a PLC control circuit board 41 is fixedly installed in the box body 1, and a touch control screen 5 is fixedly installed by embedding on the front surface of the box body 1. Flow controller bodies and solenoid valve bodies are installed in the delivery pipe A111, the delivery pipe B121, and the delivery pipe C131. The touch control screen 5, the PLC control circuit board 41, the flow controller bodies, and the solenoid valve bodies are electrically connected. A variable voltage power supply 4 is fixedly installed in the box body 1, and the variable voltage power supply 4 is electrically connected to the touch control screen 5, the PLC control circuit board 41, the flow controller bodies, and the solenoid valve bodies. A power supply line connection terminal 7 and a switch 8 are provided on the rear surface of the box body 1, and both the power supply line connection terminal 7 and the switch 8 are electrically connected to the variable voltage power supply 4;

[0029] The connection schematic diagram of the electronic components of this device is as Figure 7 shown. After connecting the external power supply to the power supply line connection terminal 7 and turning on the power supply by opening the switch 8, the electronic components inside the device as a whole can be powered. The flow controller body can feedback the flow rate data detected in the corresponding delivery pipe to the PLC control circuit board 41, and the data is transmitted to the touch control screen 5 for display via the PLC control circuit board 41. After observing the large data on the touch control screen 5, the touch control screen 5 can send control commands to the flow controller bodies and the solenoid valve bodies at various positions through the PLC control circuit board 41 to adjust their working states.

[0030] For the convenience of overhauling and maintaining the electronic components in the box body 1, a maintenance opening is provided on the upper surface of the box body 1. Slots 14 are provided on both sides of the upper surface of the box body 1. A cover plate 15 is inserted and installed between the two slots 14. The cover plate 15 completely covers the maintenance opening, and bolts 16 are screwed and installed between the cover plate 15 and the box body 1. The bolts 16 can be unscrewed, and the cover plate 15 can be moved backward and pulled out to open the maintenance opening on the box body 1. The electronic components in the box body 1 can be overhauled and maintained at the maintenance opening.

[0031] Finally, when the device is idle, to prevent dust from entering each pipeline from the zero gas connector 12, standard gas connector 13, and detection connector 11, magnetic covers 6 are magnetically installed on the front and rear surfaces of the box body 1. Magnets are provided at the rear ends of the magnetic covers 6, and the magnets can be adsorbed on the outer surface of the box body 1. The front magnetic cover 6 is used to seal the zero gas connector 12 and the standard gas connector 13, and the rear magnetic cover 6 is used to seal the detection connector 11. When the device is idle, the front magnetic cover 6 can be buckled on the outside of the zero gas connector 12 and the standard gas connector 13 for sealing, and the rear magnetic cover 6 can be buckled on the outside of the detection connector 11 for sealing, so as to achieve the purpose of dust-proof protection.

Claims

1. A portable standard gas dilution device, comprising a box body (1) with two handles arranged on the front surface, characterized in that, A detection connector (11) is fixedly installed on the front surface of the box body (1). A zero-air connector (12) and a calibration-gas connector (13) are fixedly installed on the rear surface of the box body (1). A mixing container (2) is fixedly installed inside the box body (1). An S-shaped channel (21) is arranged inside the mixing container (2). A zero-air inlet (211) and a calibration-gas inlet (212) are penetratingly opened on the rear surface of the mixing container (2). A delivery pipe B (121) is connected between the zero-air inlet (211) and the zero-air connector (12). A dilution-gas discharge port (22) is penetratingly opened on the front surface of the mixing container (2). A delivery pipe A (111) is connected between the dilution-gas discharge port (22) and the detection connector (11). An S-shaped pipe (3) is fixedly installed inside the S-shaped channel (21). A plurality of through openings (31) are equidistantly penetratingly opened on the lower surface of the S-shaped pipe (3). The front end of the S-shaped pipe (3) is hermetically connected to the exhaust end of the calibration-gas inlet (212). The rear end of the S-shaped pipe (3) is in a sealed state. A delivery pipe C (131) is connected between the calibration-gas inlet (212) and the calibration-gas connector (13).

2. The portable standard gas dilution device according to claim 1, wherein, A PLC control circuit board (41) is fixedly installed inside the box body (1). A touch control screen (5) is fixedly installed by embedding on the front surface of the box body (1). A flow controller main body and a solenoid valve main body are installed inside each of the delivery pipe A (111), the delivery pipe B (121), and the delivery pipe C (131). The touch control screen (5), the PLC control circuit board (41), the flow controller main body, and the solenoid valve main body are electrically connected to each other.

3. The portable standard gas dilution device according to claim 2, characterized in that, A variable voltage power supply (4) is fixedly installed inside the box body (1). The variable voltage power supply (4) is electrically connected to the touch control screen (5), the PLC control circuit board (41), the flow controller main body, and the solenoid valve main body. A power cord connection end (7) and a switch (8) are arranged on the rear surface of the box body (1). The power cord connection end (7) and the switch (8) are both electrically connected to the variable voltage power supply (4).

4. A portable standard gas dilution device according to claim 1, wherein A maintenance opening is opened on the upper surface of the box body (1). Slots (14) are opened on both sides of the upper surface of the box body (1). A cover plate (15) is inserted and installed between the two slots (14). The cover plate (15) completely covers the maintenance opening. Bolts (16) are installed by screwing between the cover plate (15) and the box body (1).

5. A portable standard gas dilution device according to claim 1, characterized in that, Magnetic covers (6) are magnetically installed on the front and rear surfaces of the box body (1). The front magnetic cover (6) is used to seal the zero-air connector (12) and the calibration-gas connector (13). The rear magnetic cover (6) is used to seal the detection connector (11).

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