Analyzing instrument preprocessing system

Abstract

An analysis instrument pretreatment system comprises a pneumatic three-way valve, a first glass rotameter, a three-way ball valve, a first filtering pressure reducing valve and a two-way needle valve, an outlet of the pneumatic three-way valve is communicated with a flow cell through a pipeline, and a first inlet of the pneumatic three-way valve, the first glass rotameter and an outlet of the three-way ball valve are sequentially communicated through pipelines. A first inlet of the three-way ball valve, the first filtering pressure reducing valve and the air conveying device are sequentially communicated through pipelines, a second inlet of the three-way ball valve is communicated with the standard gas conveying device through a pipeline, and a second inlet of the pneumatic three-way valve, the two-way needle valve and the steam conveying device are sequentially communicated through pipelines. A power execution mechanism of the pneumatic three-way valve is communicated with a first air outlet of the instrument through a pipeline. According to the utility model, the service life of the analysis instrument can be prolonged, the use effect is good, and the use cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of chemical testing, and in particular to a pretreatment system for analytical instruments. Background Technology

[0002] Gas analyzers are indispensable monitoring devices in chemical production, environmental protection, and other fields. The fundamental task of process analysis is to quickly, accurately, and stably analyze the composition parameters of industrial processes over long periods. Currently, the sampling probes of these analyzers are susceptible to corrosion from samples after prolonged use, leading to a reduction in the instrument's lifespan and potential measurement errors. This results in a decline in the instrument's operational quality. Frequent replacements not only significantly increase costs but also disrupt normal production operations. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an analytical instrument pretreatment system that can extend the service life of analytical instruments, improve their performance, and reduce their operating costs.

[0004] The technical solution adopted by this utility model to solve its technical problem is an analytical instrument pretreatment system, including a pneumatic three-way valve, a first glass rotor flowmeter, a three-way ball valve, a first filter pressure reducing valve, and a two-way needle valve. The outlet of the pneumatic three-way valve is connected to a flow tank through a pipeline. The first inlet of the pneumatic three-way valve, the first glass rotor flowmeter, and the outlet of the three-way ball valve are sequentially connected through pipelines. The first inlet of the three-way ball valve, the first filter pressure reducing valve, and an air delivery device are sequentially connected through pipelines. The second inlet of the three-way ball valve is connected to a standard gas delivery device through a pipeline. The second inlet of the pneumatic three-way valve, the two-way needle valve, and a steam delivery device are sequentially connected through pipelines. The power actuator of the pneumatic three-way valve is connected to the first air outlet of the instrument through a pipeline.

[0005] The advantages of the above technical solution are as follows: When calibration is required, first open the air delivery device and the first filter pressure reducing valve, and connect the first inlet and outlet of the three-way ball valve to the first filter pressure reducing valve. This allows the standard gas to pass through the three-way ball valve, then through the first glass rotor flow meter, and finally to the pneumatic three-way valve. The instrument controls the power actuator of the pneumatic three-way valve to connect the first inlet and outlet, thus delivering the discharged air to the flow cell. After sampling by the sampling probe of the analytical instrument, zero-point calibration is performed. After zero-point calibration, the air delivery device and the corresponding circuit are closed. Then, the standard gas delivery device is opened, and the second inlet and outlet of the three-way ball valve are connected to the standard gas delivery device. This allows the standard gas to pass through the three-way ball valve, then through the first glass rotor flow meter, and finally to the pneumatic three-way valve. The instrument controls the power actuator of the pneumatic three-way valve to connect the first inlet and outlet of the pneumatic three-way valve again. The standard gas is then fed into the flow cell, and after sampling by the analytical instrument's sampling probe, the range is calibrated to effectively avoid errors. After calibration, the standard gas delivery device and corresponding circuit are shut off. When cleaning the analytical instrument's sampling probe is required, the steam delivery device is opened, and the internal channel of the two-way needle valve is opened. The instrument controls the power actuator of the pneumatic three-way valve to connect the second inlet and outlet, thereby delivering the discharged steam into the flow cell to complete the cleaning of the sampling probe. The first glass rotor flowmeter is set to monitor the gas flow rate discharged into the flow cell, preventing excessively low or high flow rates from affecting the analytical instrument's service life and the accuracy of calibration results. The pretreatment settings of the above structure achieve the purpose of calibrating and cleaning the sampling probe. Analytical instruments with this pretreatment head have a long service life, better performance, and reduced operating costs.

[0006] Furthermore, the pretreatment system also includes a steam pressure regulating valve and a first three-way connector. The outlet of the steam pressure regulating valve is connected to the steam conveying device through a pipe. The first three-way connector is located on the connecting pipe between the inlet of the two-way needle valve and the steam conveying device, and the inlet of the steam pressure regulating valve is connected to the first three-way connector through a pipe.

[0007] The advantages of the above technical solution are as follows: the inlet of the steam pressure regulating valve, the inlet of the two-way needle valve, and the steam conveying device are respectively connected to the three joints of the first three-way connector. Since the outlet of the steam pressure regulating valve is also connected to the steam conveying device, when the two-way needle valve is closed, the steam delivered to the two-way needle valve will be pressure regulated by the steam pressure regulating valve and returned to the steam conveying device, thereby achieving the purpose of energy saving and efficiency improvement. The structural design is reasonable.

[0008] Furthermore, the pretreatment system also includes a first radial pressure gauge, a second radial pressure gauge, a second tee connector, and a third tee connector. The second tee connector is located on the connecting pipe between the second inlet of the pneumatic tee valve and the outlet of the two-way needle valve. The first radial pressure gauge is connected to the second tee connector through a pipe. The third tee connector is located on the connecting pipe between the outlet of the steam pressure regulating valve and the steam conveying device. The second radial pressure gauge is connected to the third tee connector through a pipe.

[0009] The advantages of the above technical solution are as follows: the second inlet of the pneumatic three-way valve, the outlet of the two-way needle valve, and the first radial pressure gauge are respectively connected to the three joints of the second three-way connector. Therefore, the first radial pressure gauge realizes the monitoring of steam pressure in the pipeline between the two-way needle valve and the pneumatic three-way valve. When the steam conveying device is connected to one joint of the third three-way connector through the pipeline, the outlet of the steam pressure regulating valve and the second radial pressure gauge are respectively connected to the other two joints of the third three-way connector. Therefore, the second radial pressure gauge realizes the monitoring of steam pressure in the pipeline between the outlet of the steam pressure regulating valve and the steam conveying device, making the use of the pretreatment system safer.

[0010] Furthermore, a two-way connector is provided between the first radial pressure gauge and the connected pipe, and between the second radial pressure gauge and the connected pipe. The inner end of the two-way connector is connected to the first radial pressure gauge and the second radial pressure gauge through an NPTF dry-seal tapered pipe thread.

[0011] The advantages of the above technical solution are: the two two-way connectors are connected to the corresponding first and second radial pressure gauges by a combination of NPTF dry-seal tapered pipe threads, which is safe and reliable, meets the high-pressure sealing requirements, and ensures the reliability of pressure monitoring.

[0012] Furthermore, the pretreatment system also includes a second glass rotor flow meter and a fourth three-way connector. The fourth three-way connector is located on the connecting pipe between the first inlet of the three-way ball valve and the first filter pressure reducing valve. The ejector, the second glass rotor flow meter, and the fourth three-way connector are connected in sequence through the pipe.

[0013] The advantages of adopting the above technical solution are as follows: the outlet of the first filter pressure reducing valve, the inlet of the three-way ball valve, and the second glass rotor flow meter are respectively connected to the three joints of the fourth three-way connector. Therefore, the air delivery device can also deliver air to the ejector. The structural design is more reasonable. The second glass rotor flow meter can monitor the gas flow rate delivered to the ejector to prevent the safety of use from being affected by too low or too high flow rates.

[0014] Furthermore, the pretreatment system also includes a normally closed two-way pneumatic valve, which is located on the connecting pipe between the first inlet of the pneumatic three-way valve and the first glass rotor flowmeter. The power actuator of the normally closed two-way pneumatic valve is connected to the second outlet of the instrument through a pipe.

[0015] The advantages of adopting the above technical solution are as follows: by controlling the power actuator of the normally closed two-way pneumatic valve through the instrument, the inlet and outlet of the normally closed two-way pneumatic valve are connected, thereby delivering air to the pneumatic three-way valve. The setting of the normally closed two-way pneumatic valve improves the safety of gas delivery and has a reasonable structural design.

[0016] Furthermore, the pretreatment system also includes a second filter pressure reducing valve and a fifth three-way connector. The fifth three-way connector is located on the connecting pipe between the first filter pressure reducing valve and the air delivery device. The instrument and the second filter pressure reducing valve are connected to the fifth three-way connector in sequence through pipes.

[0017] The advantages of the above technical solution are as follows: the air delivery device, the inlet of the first filter valve, and the inlet of the second filter valve are respectively connected to the fifth three-way connector, and the outlet of the second filter valve is connected to the instrument, thereby supplying air to the instrument. Therefore, the setting of the second filter valve makes the instrument safer to use and the structural design is reasonable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] In the diagram: 1-Pneumatic three-way valve, 2-First glass rotor flow meter, 3-Three-way ball valve, 4-First filter pressure reducing valve, 5-Two-way needle valve, 6-Instrument, 7-Steam pressure regulating valve, 8-First three-way connector, 9-First radial pressure gauge, 10-Second radial pressure gauge, 11-Second three-way connector, 12-Third three-way connector, 13-Two-way connector, 14-Second glass rotor flow meter, 15-Fourth three-way connector, 16-Normally closed two-way pneumatic valve, 17-Second filter pressure reducing valve, 18-Fifth three-way connector. Detailed Implementation

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model and / or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort. Furthermore, references to orientation only indicate the relative positional relationship between the components, not their absolute positional relationship.

[0021] Please see Figure 1 As shown, an analytical instrument pretreatment system includes a pneumatic three-way valve 1, a first glass rotor flowmeter 2, a three-way ball valve 3, a first filter pressure reducing valve 4, and a two-way needle valve 5. The outlet of the pneumatic three-way valve 1 is connected to a flow tank via a pipeline. The first inlet of the pneumatic three-way valve 1, the first glass rotor flowmeter 2, and the outlet of the three-way ball valve 3 are sequentially connected via pipelines. The three-way ball valve 3 can be controlled manually or automatically. The first inlet of the three-way ball valve 3, the first filter pressure reducing valve 4, and an air delivery device are sequentially connected via pipelines. The second inlet of the three-way ball valve 3 is connected to a standard gas delivery device via a pipeline. The second inlet of the pneumatic three-way valve 1, the two-way needle valve 5, and a steam delivery device are sequentially connected via pipelines. The power actuator of valve 1 is connected to the first air outlet of instrument 6 via a pipeline. In the pretreatment system described above, when calibration is required, the air delivery device and the first filter pressure reducing valve 4 are first opened. The first filter pressure reducing valve 4 filters the delivered air to ensure safety and connects the first inlet and outlet of the three-way ball valve 3 with the first filter pressure reducing valve 4. The delivered air passes through the three-way ball valve 3, then through the first glass rotor flow meter 2, and is delivered to the pneumatic three-way valve 1. Instrument 6 controls the power actuator of the pneumatic three-way valve 1 to connect the first inlet and outlet of the pneumatic three-way valve 1, thereby delivering the discharged air into the flow cell. After sampling by the sampling probe of the analytical instrument, the zero point is calibrated. After calibration, shut down the air delivery device and its corresponding circuit, then open the standard gas delivery device, connecting the second inlet and outlet of the three-way ball valve 3 to the standard gas delivery device. The standard gas is then delivered through the three-way ball valve 3, and then through the first glass rotor flowmeter 2 to the pneumatic three-way valve 1. The instrument 6 controls the power actuator of the pneumatic three-way valve 1 to reconnect the first inlet and outlet, and the discharged standard gas is then delivered back to the flow cell. After sampling by the sampling probe of the analyzer, the range is calibrated to effectively avoid errors. After calibration, shut down the standard gas delivery device and its corresponding circuit. It should be noted that the standard gas can be hydrogen sulfide gas. When cleaning the sampling probe of the analytical instrument, the steam delivery device is turned on, and the internal channel of the two-way needle valve 5 is opened. The power actuator of the pneumatic three-way valve 1 is controlled by the instrument 6 to connect the second inlet and outlet of the pneumatic three-way valve 1, thereby delivering the discharged steam into the flow cell to complete the cleaning of the sampling probe. The first glass rotor flow meter 2 is set to monitor the flow rate of the gas discharged into the flow cell, preventing the service life of the analytical instrument and the accuracy of the calibration results from being affected by too low or too high flow rates. The pretreatment setting of the above structure achieves the purpose of calibrating and cleaning the sampling probe. Analytical instruments with this pretreatment head washing have a long service life, better performance, and can also reduce operating costs.

[0022] In this example, the pretreatment system also includes a steam pressure regulating valve 7 and a first three-way connector 8. The outlet of the steam pressure regulating valve 7 is connected to the steam conveying device through a pipe. The first three-way connector 8 is located on the connecting pipe between the inlet of the two-way needle valve 5 and the steam conveying device. The inlet of the steam pressure regulating valve 7 is connected to the first three-way connector 8 through a pipe. In the above structure, the inlet of the steam pressure regulating valve 7, the inlet of the two-way needle valve 5, and the steam conveying device are respectively connected to the three connectors of the first three-way connector 8. Since the outlet of the steam pressure regulating valve 7 is also connected to the steam conveying device to form a loop, when the two-way needle valve 5 is closed, the steam delivered to the two-way needle valve 5 will be pressure-regulated by the steam pressure regulating valve 7 and returned to the steam conveying device, thereby achieving the purpose of energy saving and efficiency improvement. The structural design is reasonable.

[0023] In this example, the pretreatment system also includes a first radial pressure gauge 9, a second radial pressure gauge 10, a second three-way connector 11, and a third three-way connector 12. The second three-way connector 11 is located on the connecting pipe between the second inlet of the pneumatic three-way valve 1 and the outlet of the two-way needle valve 5. The first radial pressure gauge 9 is connected to the second three-way connector 11 via a pipe. The third three-way connector 12 is located on the connecting pipe between the outlet of the steam pressure regulating valve 7 and the steam conveying device. The second radial pressure gauge 10 is connected to the third three-way connector 12 via a pipe. In the above structure, the second inlet of the pneumatic three-way valve 1, the outlet of the two-way needle valve 5, and... The first radial pressure gauge 9 is connected to the three joints of the second three-way connector 11. Therefore, the first radial pressure gauge 9 realizes the monitoring of steam pressure in the pipeline between the two-way needle valve 5 and the pneumatic three-way valve 1. When the steam conveying device is connected to one joint of the third three-way connector 12 through the pipeline, the outlet of the steam pressure regulating valve 7 and the second radial pressure gauge 10 are connected to the other two joints of the third three-way connector 12. Therefore, the second radial pressure gauge 10 realizes the monitoring of steam pressure in the pipeline between the outlet of the steam pressure regulating valve 7 and the steam conveying device, making the use of the pretreatment system safer.

[0024] In this embodiment, a two-way connector 13 is provided between the first radial pressure gauge 9 and the connected pipe, and between the second radial pressure gauge 10 and the connected pipe. The inner end of the corresponding two-way connector 13 is connected to the first radial pressure gauge 9 and the second radial pressure gauge 10 through an NPTF dry-seal tapered pipe thread. In the above structure, the two two-way connectors 13 are connected to the corresponding first radial pressure gauge 9 and second radial pressure gauge 10 through a combination of NPTF dry-seal tapered pipe threads, which is safe and reliable, meets the high-pressure sealing requirements, and ensures the reliability of pressure monitoring.

[0025] In this embodiment, the pretreatment system also includes a second glass rotor flow meter 14 and a fourth three-way connector 15. The fourth three-way connector 15 is located on the connecting pipe between the first inlet of the three-way ball valve 3 and the first filter pressure reducing valve 4. The ejector, the second glass rotor flow meter 14, and the fourth three-way connector 15 are connected sequentially through the pipe. In the above structure, the outlet of the first filter pressure reducing valve 4, the inlet of the three-way ball valve 3, and the second glass rotor flow meter 14 are respectively connected to the three connectors of the fourth three-way connector 15. Therefore, the air delivery device can also deliver air to the ejector. The structural design is more reasonable. The second glass rotor flow meter 14 can monitor the gas flow rate delivered to the ejector to prevent excessively low or excessive flow rates from affecting the safety of use.

[0026] In this embodiment, the pretreatment system also includes a normally closed two-way pneumatic valve 16. The normally closed two-way pneumatic valve 16 is located on the connecting pipe between the first inlet of the pneumatic three-way valve 1 and the first glass rotor flowmeter 2. The power actuator of the normally closed two-way pneumatic valve 16 is connected to the second air outlet of the instrument 6 through the pipe. In the above structure, the instrument 6 controls the operation of the power actuator of the normally closed two-way pneumatic valve 16 to make the inlet and outlet of the normally closed two-way pneumatic valve 6 connected, thereby delivering air to the pneumatic three-way valve 1. The setting of the normally closed two-way pneumatic valve 16 improves the safety of gas delivery and has a reasonable structural design.

[0027] In this embodiment, the pretreatment system also includes a second filter pressure reducing valve 17 and a fifth three-way connector 18. The fifth three-way connector 18 is located on the connecting pipe between the first filter pressure reducing valve 4 and the air delivery device. The instrument 6 and the second filter pressure reducing valve 17 are connected to the fifth three-way connector 18 in sequence through the pipe. In the above structure, the inlet of the air delivery device, the first filter valve 4, and the inlet of the second filter valve 17 are respectively connected to the fifth three-way connector 18, and the outlet of the second filter valve 17 is connected to the instrument, thereby supplying air to the instrument. Therefore, the setting of the second filter valve 17 makes the instrument 6 safer to use and the structural design is reasonable.

[0028] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. An analytical instrument pretreatment system, characterized in that: The device includes a pneumatic three-way valve (1), a first glass rotor flowmeter (2), a three-way ball valve (3), a first filter pressure reducing valve (4), and a two-way needle valve (5). The outlet of the pneumatic three-way valve (1) is connected to the flow pool through a pipeline. The first inlet of the pneumatic three-way valve (1), the first glass rotor flowmeter (2), and the outlet of the three-way ball valve (3) are connected in sequence through pipelines. The first inlet of the three-way ball valve (3), the first filter pressure reducing valve (4), and the air delivery device are connected in sequence through pipelines. The second inlet of the three-way ball valve (3) is connected to the standard gas delivery device through a pipeline. The second inlet of the pneumatic three-way valve (1), the two-way needle valve (5), and the steam delivery device are connected in sequence through pipelines. The power actuator of the pneumatic three-way valve (1) is connected to the first air outlet of the instrument (6) through a pipeline.

2. The analytical instrument pretreatment system according to claim 1, characterized in that: The pretreatment system also includes a steam pressure regulating valve (7) and a first three-way connector (8). The outlet of the steam pressure regulating valve (7) is connected to the steam conveying device through a pipeline. The first three-way connector (8) is located on the connecting pipeline between the inlet of the two-way needle valve (5) and the steam conveying device, and the inlet of the steam pressure regulating valve (7) is connected to the first three-way connector (8) through a pipeline.

3. The analytical instrument pretreatment system according to claim 2, characterized in that: The pretreatment system also includes a first radial pressure gauge (9), a second radial pressure gauge (10), a second three-way connector (11), and a third three-way connector (12). The second three-way connector (11) is located on the connecting pipe between the second inlet of the pneumatic three-way valve (1) and the outlet of the two-way needle valve (5). The first radial pressure gauge (9) is connected to the second three-way connector (11) through a pipe. The third three-way connector (12) is located on the connecting pipe between the outlet of the steam pressure regulating valve (7) and the steam conveying device. The second radial pressure gauge (10) is connected to the third three-way connector (12) through a pipe.

4. The analytical instrument pretreatment system according to claim 3, characterized in that: A two-way connector (13) is provided between the first radial pressure gauge (9) and the connected pipe, and between the second radial pressure gauge (10) and the connected pipe. The inner end of the corresponding two-way connector (13) is connected to the first radial pressure gauge (9) and the second radial pressure gauge (10) through an NPTF dry-seal tapered pipe thread.

5. The analytical instrument pretreatment system according to claim 1, characterized in that: The pretreatment system also includes a second glass rotor flow meter (14) and a fourth three-way connector (15). The fourth three-way connector (15) is located on the connecting pipe between the first inlet of the three-way ball valve (3) and the first filter pressure reducing valve (4). The ejector, the second glass rotor flow meter (14), and the fourth three-way connector (15) are connected in sequence through the pipe.

6. The analytical instrument pretreatment system according to claim 1, characterized in that: The pretreatment system also includes a normally closed two-way pneumatic valve (16), which is located on the connecting pipe between the first inlet of the pneumatic three-way valve (1) and the first glass rotor flowmeter (2). The power actuator of the normally closed two-way pneumatic valve (16) is connected to the second outlet of the instrument (6) through a pipe.

7. The analytical instrument pretreatment system according to claim 6, characterized in that: The pretreatment system also includes a second filter pressure reducing valve (17) and a fifth three-way connector (18). The fifth three-way connector (18) is located on the connecting pipe between the first filter pressure reducing valve (4) and the air delivery device. The instrument (6) and the second filter pressure reducing valve (17) are connected to the fifth three-way connector (18) in sequence through the pipe.

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