Ventilation block device and gas chromatograph

Abstract

The utility model relates to a ventilation block device and a gas chromatograph. The ventilation block device comprises a ventilation block, the ventilation block is of an integrated structure, and the ventilation block is provided with a standard gas channel, a first six-way valve channel, a second six-way valve channel, a first multiplexing channel, a branch channel, a carrier gas channel, a second multiplexing channel and a chromatographic analysis channel; the first multiplexing channel is communicated with the second multiplexing channel, one end of the branch channel is communicated between the first multiplexing channel and the second multiplexing channel, and the other end of the branch channel is communicated with the carrier gas channel; the standard gas valve is communicated between the standard gas channel and the first six-way valve channel; the first control valve is communicated between the second six-way valve channel and the first multiplexing channel; the carrier gas valve is communicated between the carrier gas channel and the branch channel; and the second control valve is communicated between the second multiplexing channel and the chromatographic analysis channel. According to the ventilation block device, all the control valves are connected through the ventilation block of an integrated structure, pipeline connection is reduced, and the leakage risk caused by installation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas analysis, in particular to a ventilation block device and a gas chromatograph. Background Art

[0002] Transformers often use insulating oil for insulation. Chromatographic analysis of the gases in the insulating oil can reveal potential faults within the transformer, such as overheating, discharge, and insulation moisture. This chromatographic analysis can also effectively understand the extent of the fault and facilitate early diagnosis.

[0003] During normal operation, the insulating oil and solid insulation of a transformer gradually age and deteriorate, releasing small amounts of gases such as hydrogen, methane, ethane, ethylene, acetylene, and carbon monoxide. When an overheating or discharge fault occurs within the transformer, or when the internal insulation becomes damp, the levels of these gases increase rapidly. The principle of oil chromatography analysis is based on the fact that the generation rate of any specific hydrocarbon gas varies with temperature. The main transformer chromatography online monitoring system monitors the content and growth rate of fault-signaling gases dissolved in the oil of oil-immersed high-voltage equipment, such as transformers, and uses a fault diagnosis expert system to provide early warning of potential equipment failures, thereby avoiding equipment accidents, reducing significant losses, and improving equipment reliability.

[0004] Transformer oil chromatographic analysis primarily involves two steps: degassing and sample analysis. The chromatographic column in the gas separation unit has different adsorption and desorption properties for different gases, separating the characteristic gases one by one. The semiconductor gas sensor at the end of the column detects each characteristic gas in the order of its peaks and converts the concentration characteristics of the gas into an electrical signal. Currently, the piping connections are complex, which not only poses a risk of leakage but also reduces measurement accuracy due to the large dead volume. Utility Model Content

[0005] Based on this, the utility model provides a ventilation block device, comprising: a ventilation block, the ventilation block is an integrated structure, the ventilation block has a standard gas channel, a first six-way valve channel, a second six-way valve channel, a first multiplexing channel, a branch channel, a carrier gas channel, a second multiplexing channel and a chromatographic analysis channel, wherein the first multiplexing channel is connected to the second multiplexing channel, one end of the branch channel is connected between the first multiplexing channel and the second multiplexing channel, and the other end of the branch channel is connected to the carrier gas channel;

[0006] a standard gas valve connected between the standard gas channel and the first six-way valve channel;

[0007] a first control valve connected between the second six-way valve channel and the first multiplexing channel;

[0008] a carrier gas valve connected between the carrier gas channel and the branch channel; and

[0009] The second control valve is connected between the second multiplexing channel and the chromatographic analysis channel.

[0010] In some embodiments, the ventilation block device also includes: a standard gas interface, connected to the standard gas channel, the standard gas interface is used to receive the gas to be analyzed; a carrier gas interface, connected to the carrier gas channel, the carrier gas interface is used to receive the carrier gas; a chromatographic interface, connected to the chromatographic analysis channel, the chromatographic interface is used to output the gas to be analyzed.

[0011] This configuration enables adaptive connection to external devices.

[0012] In some embodiments, the ventilation block device further includes: a first six-way valve interface connected to the first six-way valve channel; and a second six-way valve interface connected to the second six-way valve channel.

[0013] Such a configuration can be adaptively connected to a six-way valve. For example, the first six-way valve interface is used to connect to the second six-way port of the six-way valve; the second six-way valve interface is used to connect to the fifth six-way port of the six-way valve.

[0014] In some embodiments, the ventilation block device also includes a third six-way valve interface, a degassing valve and a degassing interface; the ventilation block also has a third six-way valve channel and a degassing channel, the third six-way valve channel is connected to the third six-way valve interface, the degassing channel is connected to the third six-way valve channel through the degassing valve, and the degassing channel is connected to the degassing interface.

[0015] Such a configuration improves the integration of the ventilation block and also ensures degassing. Exemplarily, the third six-way valve interface is used to connect to the third six-way port of the six-way valve.

[0016] In some embodiments, the ventilation block device also includes a first muffler; the ventilation block also has a first muffler channel; the degassing valve includes a two-position three-way valve, the common port of the degassing valve is connected to the third six-way valve channel, the opening of the degassing valve is connected to the degassing channel, and the closed port of the degassing valve is connected to the first muffler through the first muffler channel.

[0017] With such an arrangement, the first muffler can be used for silencing, and the degassing valve can quickly switch functions.

[0018] In some embodiments, the ventilation block device also includes a first pressure-stabilizing valve interface and a second pressure-stabilizing valve interface; the ventilation block also has a pressure-stabilizing channel; the carrier gas channel is connected to the pressure-stabilizing channel through the carrier gas valve, and the pressure-stabilizing channel is connected to the first pressure-stabilizing valve interface; the branch channel is connected to the second pressure-stabilizing valve interface.

[0019] Such setting can achieve voltage stabilization.

[0020] In some embodiments, the ventilation block device further includes a third control valve and a fourth control valve; the ventilation block further has a first transfer channel and a second transfer channel; the first transfer channel is connected to the second six-way valve channel through the first control valve, and the first transfer channel is connected to the first multiplexing channel through the third control valve; the second transfer channel is connected to the chromatographic analysis channel through the second control valve, and the second transfer channel is connected to the second multiplexing channel through the fourth control valve.

[0021] Such an arrangement can effectively implement the introduction of the carrier gas, and realize the control of the first multiplexing channel and the control of the second multiplexing channel.

[0022] In some embodiments, the ventilation block device also includes a second silencer and a third silencer; the ventilation block also has a second silencer channel and a third silencer channel; the first control valve includes a two-position three-way valve, and the common port of the first control valve is connected to the second six-way valve channel; the second control valve includes a two-position three-way valve, and the closed port of the second control valve is connected to the chromatography analysis channel; the third control valve includes a two-position three-way valve, and the common port of the third control valve is connected to the closed port of the first control valve, the opening of the third control valve is connected to the first reuse channel, and the closed port of the third control valve is connected to the second silencer through the second silencer channel; the fourth control valve includes a two-position three-way valve, and the closed port of the fourth control valve is connected to the second reuse channel, the common port of the fourth control valve is connected to the common port of the second control valve, and the opening of the fourth control valve is connected to the third silencer through the third silencer channel.

[0023] With this arrangement, the second and third mufflers can be used for noise reduction, and each control valve can be controlled quickly.

[0024] In some embodiments, the ventilation block is a ventilation block made of an aluminum block; the ventilation block has a first side surface and a second side surface opposite to each other, and a third side surface and a fourth side surface respectively connected between the first side surface and the second side surface; the standard gas channel and the carrier gas channel are connected to the first side surface; the standard gas valve, the carrier gas valve and the second control valve are arranged on the third side surface; the first six-way valve channel, the second six-way valve channel and the chromatography analysis channel are connected to the second side surface; the first control valve is arranged on the fourth side surface; the channels of the ventilation block include straight holes with an aperture less than or equal to 2 mm or multiple straight holes with an aperture less than or equal to 2 mm that intersect perpendicularly with each other.

[0025] With this arrangement, the vent block will not generate gases that may affect the measurement, and will not be easily corroded.

[0026] The utility model also provides a gas chromatograph, which comprises: a chromatographic column; a detector; a six-way valve; and the aforementioned ventilation block device, wherein the ventilation block device is correspondingly connected to the six-way valve and the chromatographic column.

[0027] The beneficial effects of the utility model are as follows:

[0028] The vent block device of this utility model utilizes an integrated vent block to connect the control valves, reducing the number of pipe connections and the risk of leakage caused by installation. Furthermore, the vent block can be compact, and each channel can be short, reducing dead volume in the pipe connections, lowering gas consumption during measurement, and improving measurement accuracy. The location of the branch channel facilitates closer proximity of the carrier gas to the chromatographic analysis channel. The gas chromatograph provided by this utility model is compact, safe to use, and provides excellent measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural block diagram of the gas chromatograph of the present utility model;

[0030] Figure 2 This is a schematic structural diagram of the ventilation block device of the utility model;

[0031] Figure 3 This is a schematic exploded view of the ventilation block device of the present invention;

[0032] Figure 4 This is a structural diagram of the ventilation block of the utility model;

[0033] Figure 5 This is a schematic diagram of the back structure of the ventilation block device of the utility model;

[0034] Figure 6 This is a schematic diagram of the top structure of the ventilation block device of the utility model;

[0035] Figure 7 for Figure 6 Schematic cross-sectional view at AA in the middle;

[0036] Figure 8 This is a side structural diagram of the ventilation block device of the utility model;

[0037] Figure 9 This is a schematic diagram of the bottom structure of the ventilation block device of the utility model;

[0038] Figure 10 for Figure 9 Schematic cross-sectional view at the middle BB;

[0039] Figure 11 for Figure 9 Schematic cross-sectional view at CC;

[0040] Figure 12 This is a front structural diagram of the ventilation block device of the utility model;

[0041] Figure 13 for Figure 12 Schematic cross-sectional view at DD in the middle;

[0042] Figure 14 for Figure 12 Schematic cross-sectional view at EE;

[0043] Figure 15 for Figure 12 Schematic cross-sectional view at FF in the middle.

[0044] Explanation of reference numerals: 1, ventilation block; 101, standard gas channel; 102, first six-way valve channel; 103, second six-way valve channel; 104, first multiplexing channel; 105, branch channel; 106, carrier gas channel; 107, second multiplexing channel; 108, chromatographic analysis channel; 109, third six-way valve channel; 110, degassing channel; 111, first silencer channel; 112, pressure-stabilizing channel; 113, first transfer channel; 114, second transfer channel; 115, second silencer channel; 116, third silencer channel; 117, first side surface; 118, second side surface; 119, third side surface; 120, fourth side surface; 121, fifth side surface; 122, threaded hole;

[0045] 2. Standard gas valve; 3. First control valve; 4. Carrier gas valve; 5. Second control valve; 6. Standard gas interface; 7. Carrier gas interface; 8. Chromatographic interface; 9. First six-way valve interface; 10. Second six-way valve interface; 11. Third six-way valve interface; 12. Degassing valve; 13. Degassing interface; 14. First muffler; 15. First pressure-stabilizing valve interface; 16. Second pressure-stabilizing valve interface; 17. Third control valve; 18. Fourth control valve; 19. Second muffler; 20. Third muffler

[0046] 100. Ventilation block device; 200. Six-way valve; 210. First port of six-way valve; 220. Second port of six-way valve; 230. Third port of six-way valve; 240. Fourth port of six-way valve; 250. Fifth port of six-way valve; 260. Sixth port of six-way valve; 300. Detection device; 301. Chromatographic column; 302. Detector; 400. Pressure regulating valve; 1000. Gas chromatograph. DETAILED DESCRIPTION

[0047] The embodiments of the present invention will be described in detail below with reference to the examples. The following examples are only used to illustrate the present invention and should not be considered as limiting the scope of the present invention.

[0048] refer to Figure 1 , Figure 1 The gas chromatograph of the present invention is shown in FIG. In an exemplary embodiment, the gas chromatograph 1000 includes a ventilation block device 100, a six-way valve 200, and a detection device 300. The gas chromatograph 1000 is capable of detecting gas.

[0049] refer to Figure 2 , Figure 2The utility model ventilation block device is shown. Figure 3 and Figure 1 As shown, in an exemplary embodiment, the ventilation block device 100 includes a ventilation block 1, a calibration gas valve 2, a first control valve 3, a carrier gas valve 4, and a second control valve 5. The calibration gas valve 2, the first control valve 3, the carrier gas valve 4, and the second control valve 5 can all be installed on the ventilation block 1. The ventilation block 1 has a channel for connecting the various valves to form a pipeline layout.

[0050] Exemplarily, the ventilation block 1 is provided with threaded holes 122, and each valve can be fixed to the ventilation block 1 by screws. Exemplarily, the ventilation block device 100 includes a sealing ring, which is conducive to ensuring that each valve is airtightly connected to the ventilation block 1.

[0051] For example, the ventilation block 1 is an integrated structure with a simple and compact structure and good strength. The ventilation block device 100 has a high degree of integration.

[0052] Combine Figure 4 As shown, in some embodiments, the ventilation block 1 has a standard gas channel 101, a first six-way valve channel 102, a second six-way valve channel 103, a first multiplexing channel 104, a branch channel 105, a carrier gas channel 106, a second multiplexing channel 107 and a chromatography analysis channel 108. Figure 7 As shown, the first multiplexing channel 104 is connected to the second multiplexing channel 107 , and one end of the branch channel 105 is connected between the first multiplexing channel 104 and the second multiplexing channel 107 .

[0053] For example, in the ventilation block device 100 , the other end of the branch channel 105 is connected to the carrier gas channel 106 , and the two channels can be indirectly connected by means of an element or channel outside the ventilation block 1 .

[0054] The carrier gas valve 4 is connected between the carrier gas channel 106 and the branch channel 105, and the carrier gas valve 4 can control the on-off of the carrier gas channel 106 and the branch channel 105. For example, the carrier gas valve 4 and the branch channel 105 can be indirectly connected by means of an element or channel outside the ventilation block 1.

[0055] The second control valve 5 is connected between the second multiplexing channel 107 and the chromatographic analysis channel 108 .

[0056] The calibration gas valve 2 is connected between the calibration gas channel 101 and the first six-way valve channel 102, and can control the opening and closing of the calibration gas channel 101 and the first six-way valve channel 102. The first six-way valve channel 102 is used to connect to the six-way valve 200, illustratively, to the six-way second port 220 of the six-way valve 200.

[0057] The first control valve 3 is connected between the second six-way valve channel 103 and the first multiplexing channel 104. The first control valve 3 can control the opening and closing of the second six-way valve channel 103 and the first multiplexing channel 104. The second six-way valve channel 103 is used to connect to the six-way valve 200, illustratively, to the six-way fifth port 250 of the six-way valve 200.

[0058] The vent block device 100 of the present invention utilizes an integrated vent block 1 to connect various control valves, reducing piping connections and the risk of leakage during installation. Furthermore, the vent block 1 can be compact, allowing for shorter channels, reducing dead volume in the piping connections, lowering gas consumption during measurement, and improving measurement accuracy. The location of the branch channel 105 facilitates closer proximity of the carrier gas to the chromatographic analysis channel 108.

[0059] Combine Figure 1 As shown, the vent block assembly 100 is connected to the six-way valve 200 and the chromatographic column 301. The chromatographic column 301 is also connected to the six-way valve 200, for example, at the sixth port 260 of the six-way valve 200. Exemplarily, the gas chromatograph 1000 also includes a pressure-stabilizing valve 400. The vent block assembly 100 is connected to the pressure-stabilizing valve 400 to achieve pressure stabilization.

[0060] Combine Figures 2 to 5 、 Figure 7 and Figure 14 In some embodiments, the vent block device 100 further includes a first pressure-stabilizing valve interface 15 and a second pressure-stabilizing valve interface 16. The vent block 1 also has a pressure-stabilizing channel 112. The carrier gas channel 106 is connected to the pressure-stabilizing channel 112 via the carrier gas valve 4, and the pressure-stabilizing channel 112 is connected to the first pressure-stabilizing valve interface 15; the branch channel 105 is connected to the second pressure-stabilizing valve interface 16. When the carrier gas pressure delivered by a gas source such as a carrier gas generator module or a carrier gas cylinder connected to the carrier gas channel 106 is high and unstable, the pressure-stabilizing valve 400 can be used to achieve pressure stabilization.

[0061] The pressure-stabilizing channel 112 is connected to the air inlet of the pressure-stabilizing valve 400 via the first pressure-stabilizing valve interface 15, and the branch channel 105 is connected to the air outlet of the pressure-stabilizing valve 400 via the second pressure-stabilizing valve interface 16. By adjusting the pressure adjustment knob of the pressure-stabilizing valve 400, the branch channel 105 can receive carrier gas at a constant pressure. For example, the first pressure-stabilizing valve interface 15 and the second pressure-stabilizing valve interface 16 can each be connected to the vent block 1 via threads.

[0062] Combine Figures 2 to 7 、 Figure 11 In some embodiments, the ventilation block device 100 further includes a standard gas interface 6. The standard gas interface 6 is connected to the standard gas channel 101, for example, by being threadedly connected to the ventilation block 1. The standard gas interface 6 is used to receive the gas to be analyzed.

[0063] Combine Figures 2 to 7 In some embodiments, the ventilation block device 100 further includes a carrier gas interface 7. The carrier gas interface 7 is connected to the carrier gas channel 106, for example, by being threadedly connected to the ventilation block 1. The carrier gas interface 7 is used to receive carrier gas.

[0064] Combine Figures 2 to 7 、 Figure 12 and Figure 13 In some embodiments, the ventilation block device 100 further includes a chromatographic interface 8. The chromatographic interface 8 is connected to the chromatographic analysis channel 108, for example, by being threadedly connected to the ventilation block 1. The chromatographic interface 8 is used to output the gas to be analyzed.

[0065] By providing the standard gas interface 6, the carrier gas interface 7 and the chromatographic interface 8, the vent block device 100 can be adaptively connected to an external device, thereby conveniently, quickly and stably achieving an airtight connection between the vent block device 100 and external pipelines or components.

[0066] In some embodiments, the ventilation block assembly 100 further includes a first six-way valve interface 9. The first six-way valve interface 9 is connected to a first six-way valve channel 102. The ventilation block assembly 100 further includes a second six-way valve interface 10, which is connected to a second six-way valve channel 103. The ventilation block assembly 100 can be adaptively connected to a six-way valve 200. The first six-way valve interface 9 is configured to connect to the six-way second port 220 of the six-way valve 200; the second six-way valve interface 10 is configured to connect to the six-way fifth port 250 of the six-way valve 200.

[0067] In some embodiments, the ventilation block device 100 further includes a third six-way valve interface 11, a degassing valve 12, and a degassing interface 13. Each interface can be threadedly connected to the ventilation block 1. The degassing valve 12 can be fixed to the corresponding threaded hole 122 by screws.

[0068] The ventilation block 1 also has a third six-way valve channel 109 and a degassing channel 110. The third six-way valve channel 109 is connected to the third six-way valve interface 11. The degassing channel 110 is connected to the third six-way valve channel 109 via a degassing valve 12, and the degassing channel 110 is connected to the degassing interface 13. This arrangement improves the integration of the ventilation block 1 and also ensures degassing. For example, the third six-way valve interface 11 is connected to the third six-way port 230 of the six-way valve 200.

[0069] In some embodiments, the ventilation block device 100 further includes a first muffler 14; the ventilation block 1 also has a first muffler channel 111. Figure 1Exemplarily, the degassing valve 12 comprises a two-position, three-way valve, which can be a solenoid valve. The common port of the degassing valve 12 is connected to the third six-way valve channel 109. The open port of the degassing valve 12 is connected to the degassing channel 110. The closed port of the degassing valve 12 is connected to the first muffler 14 via the first muffler channel 111. The first muffler 14 can be used for noise reduction, and the degassing valve 12 can quickly switch between functions.

[0070] In some embodiments, the ventilation block device 100 further includes a third control valve 17 and a fourth control valve 18. The ventilation block 1 also has a first transfer channel 113 and a second transfer channel 114. Figures 1 to 7 、 Figure 9 、 Figure 10 The first transfer channel 113 is connected to the second six-way valve channel 103 through the first control valve 3, combined with Figure 12 and Figure 15 As shown, the first transfer channel 113 is connected to the first reuse channel 104 through the third control valve 17. Figure 12 and Figure 13 As shown, the second transfer channel 114 is connected to the chromatographic analysis channel 108 through the second control valve 5. Figure 14 The second transfer channel 114 is connected to the second reuse channel 107 through the fourth control valve 18.

[0071] Combine Figure 1 As shown, the carrier gas valve 4 can be connected to the first control valve 3 via the third control valve 17, and the carrier gas valve 4 can be connected to the second control valve 5 via the fourth control valve 18. The ventilation block device 100 can well implement the introduction of carrier gas and realize the control of the first multiplexing channel 104 and the second multiplexing channel 107.

[0072] Illustratively, the first control valve 3 comprises a two-position, three-way valve. The common port of the first control valve 3 is connected to the second six-way valve channel 103. The second control valve 5 comprises a two-position, three-way valve, with the closed port of the second control valve 5 connected to the chromatographic analysis channel 108. The first control valve 3, the second control valve 5, the calibration gas valve 2, the carrier gas valve 4, and the like can function as straight-through valves. Illustratively, the open ports are not ventilated.

[0073] In some embodiments, the ventilation block device 100 further includes a second muffler 19 and a third muffler 20. The ventilation block 1 also has a second muffler channel 115 and a third muffler channel 116.

[0074] Exemplarily, the third control valve 17 comprises a two-position, three-way valve. The common port of the third control valve 17 can be connected to the closed port of the first control valve 3 via the first transfer channel 113. The open port of the third control valve 17 is connected to the first reuse channel 104. The closed port of the third control valve 17 is connected to the second muffler 19 via the second muffler channel 115.

[0075] Exemplarily, the fourth control valve 18 comprises a two-position, three-way valve. The closed port of the fourth control valve 18 can be connected to the second reuse channel 107 via a second transfer channel 114. The common port of the fourth control valve 18 is connected to the common port of the second control valve 5, and the open port of the fourth control valve 18 is connected to the third muffler 20 via a third muffler channel 116. The ventilation block device 100 can be silenced by the second muffler 19 and the third muffler 20.

[0076] Exemplarily, each control valve is configured as a two-position three-way solenoid valve, which can achieve agile control.

[0077] In some embodiments, the vent block 1 is made of aluminum, which is easy to process and provides reliable connections. Exemplarily, the vent block 1 is made of 6061 aluminum. Exemplarily, the joints are made of stainless steel, optionally 304 stainless steel. Exemplarily, the muffler is made of copper, such as brass. The materials of the vent block assembly 100 are safe to use, do not generate gases that could affect measurements, and are not susceptible to corrosion.

[0078] For example, refer to Figure 2 、 Figure 4 and Figure 9 The ventilation block 1 has a first side surface 117 and a second side surface 118 facing each other, and the first side surface 117 and the second side surface 118 face each other along the Z-axis direction. Figure 8 As shown, the ventilation block 1 further has a third side surface 119 and a fourth side surface 120 respectively connected between the first side surface 117 and the second side surface 118. Figure 5 The ventilation block 1 further has a fifth side surface 121. The fifth side surface 121 and the third side surface 119 may be opposite to each other along the Y-axis direction. The fourth side surface 120 is deflected relative to the third side surface 119, for example, the fourth side surface 120 is perpendicular to the X-axis direction.

[0079] Combine Figures 2 to 4 As shown, the standard gas channel 101 and the carrier gas channel 106 are connected to the first side 117. For example, the degassing channel 110 is connected to the first side 117. The interfaces for external gas circuits of the vent block device 100 can be located on the same side for easy external connection. The degassing channel 110, the standard gas channel 101, and the carrier gas channel 106 are arranged sequentially along the X-axis, with each channel extending along the Z-axis.

[0080] The first six-way valve channel 102 and the second six-way valve channel 103 are connected to the second side 118. For example, the third six-way valve channel 109 is connected to the second side 118 and is spaced apart from the first six-way valve channel 102 along the X-axis. Each channel can extend along the Z-axis and align with the degassing channel 110 and the calibration gas channel 101. One end of the second six-way valve channel 103 is connected to the second side 118, and the other end extends to the fourth side 120. The third six-way valve channel 109, the first six-way valve channel 102, and the second six-way valve channel 103 are close to each other on the second side 118, facilitating connection of the six-way valve 200.

[0081] The pressure stabilizing channel 112, the chromatographic analysis channel 108, and the branch channel 105 are respectively connected to the second side surface 118. This facilitates the external connection of the pressure stabilizing valve 400 and the detection device 300. When in use, the ventilation block device 100 is connected to the external gas path substantially along the Z-axis direction, resulting in a compact structure and easy operation.

[0082] The calibration gas valve 2, carrier gas valve 4, and second control valve 5 are mounted on the third side 119, ensuring a compact structure and facilitating electrical access from the same side. For example, the degassing valve 12, calibration gas valve 2, carrier gas valve 4, second control valve 5, and third control valve 17 are all mounted on the third side 119, arranged sequentially along the X-axis. A third muffler 20 may also be mounted on the third side 119.

[0083] The first control valve 3 is disposed on the fourth side surface 120, and its position along the Z-axis direction roughly corresponds to the third control valve 17. The fourth control valve 18 is disposed on the fourth side surface 120, and its position along the Z-axis direction roughly corresponds to the second control valve 5. This arrangement shortens the piping between the control valves and centralizes the layout, which helps reduce dead volume in gas chromatography detection.

[0084] The remaining surfaces of the ventilation block 1 may basically not be provided with interfaces or control valves. For example, the fifth side surface 121 where the first muffler 14 is located is a stepped surface, which is close to the third side surface 119, and the first muffler 14 can only protrude a portion of the step.

[0085] In some embodiments, the passageway of the ventilation block 1 includes a straight hole with a pore size of less than or equal to 2 mm, or multiple perpendicularly intersecting straight holes with a pore size of less than or equal to 2 mm. For example, the pore size of the passageway is 1.8 mm or 1.9 mm. The threaded hole for connecting the control valve can be an M2 threaded hole. The configuration of the ventilation block 1 reduces the length of the gas path. The smaller pore size further reduces the volume of the pipeline through which gas circulates during measurement, reducing gas consumption and improving measurement accuracy.

[0086] The ventilation block 1 is used to open the pipeline and install the valve, which reduces a large number of joint connections, reduces pipeline leakage points, and has higher reliability.

[0087] like Figure 1 As shown, the embodiment of the present disclosure further provides a gas chromatograph 1000 , which includes a chromatographic column 301 , a six-way valve 200 and the aforementioned ventilation block device 100 .

[0088] The gas chromatograph 1000 may include a detection device 300. The detection device 300 may include a chromatographic column 301 and a detector 302. The chromatographic column 301 and the detector 302 may be provided in multiple groups. Figure 1 Based on the six-way sixth port 260, the detection device 300 includes two chromatographic columns 301 and two detectors 302, which can be arranged from bottom to top in the order of: a first chromatographic column, a first detector, a second chromatographic column, and a second detector.

[0089] The ventilation block device 100 is correspondingly connected to the six-way valve 200 and the detection device 300 , and is also connected to the chromatographic column 301 .

[0090] The gas chromatograph 1000 can detect the sample gas separated by the oil and gas separation unit. Figures 1 to 4 As shown, for example, within the six-way valve 200, the third port 230 is connected to the fourth port 240, the first port 210 is connected to the second port 220, and the first port 210 and the fourth port 240 are also connected to the ends of the quantitative tube. The sample gas enters through the degassing interface 13 and exits through the third port 230, the fourth port 240, the quantitative tube, the first port 210, the second port 220, and the standard gas interface 6, with a certain proportion of the sample gas being evenly distributed in the quantitative tube. The six-way valve 200 is then switched to connect the fourth port 240 to the fifth port 250, and the first port 210 to the sixth port 260. The carrier gas enters from the carrier gas interface 7, passes through the first control valve 3, the sixth port 250, the fourth port 240, the quantitative tube, the first port 210, and the sixth port 260, so as to bring the sample gas out from the sixth port 260 to the chromatographic column 301 for detection.

[0091] The gas chromatograph 1000 can perform standard gas calibration and standard gas verification. At the beginning of the measurement, in the six-way valve 200, the six-way third port 230 is connected to the six-way fourth port 240, the six-way first port 210 is connected to the six-way second port 220, and the six-way first port 210 and the six-way fourth port 240 are also connected to the two ends of the quantitative tube. The standard gas enters from the standard gas interface 6 and is discharged from the degassing interface 13, during which a certain amount of standard gas remains in the quantitative tube. Then the six-way valve 200 is switched so that the six-way fourth port 240 is connected to the six-way fifth port 250, and the six-way first port 210 is connected to the six-way sixth port 260. The carrier gas enters from the carrier gas interface 7, and the standard gas is brought out from the six-way sixth port 260 to the chromatographic column 301 for detection.

[0092] The gas chromatograph 1000 provided in the embodiment of the present disclosure is compact in structure and safe to use. In addition, the gas chromatograph 1000 has good measurement effect.

Claims

1. A ventilation block device, characterized in that: include: A ventilation block (1), wherein the ventilation block (1) is an integrated structure, and the ventilation block (1) comprises a standard gas channel (101), a first six-way valve channel (102), a second six-way valve channel (103), a first multiplexing channel (104), a branch channel (105), a carrier gas channel (106), a second multiplexing channel (107) and a chromatographic analysis channel (108), wherein the first multiplexing channel (104) is connected to the second multiplexing channel (107), one end of the branch channel (105) is connected between the first multiplexing channel (104) and the second multiplexing channel (107), and the other end of the branch channel (105) is connected to the carrier gas channel (106); a calibration gas valve (2) connected between the calibration gas channel (101) and the first six-way valve channel (102); a first control valve (3) connected between the second six-way valve channel (103) and the first multiplexing channel (104); a carrier gas valve (4), connected between the carrier gas channel (106) and the branch channel (105); and The second control valve (5) is connected between the second multiplexing channel (107) and the chromatographic analysis channel (108).

2. The ventilation block device according to claim 1, characterized in that Also includes: A standard gas interface (6) connected to the standard gas channel (101); A carrier gas interface (7), connected to the carrier gas channel (106); The chromatographic interface (8) is connected to the chromatographic analysis channel (108).

3. The ventilation block device according to claim 1, characterized in that Also includes: A first six-way valve interface (9), connected to the first six-way valve channel (102); The second six-way valve interface (10) is connected to the second six-way valve channel (103).

4. The ventilation block device according to claim 1, characterized in that It also includes a third six-way valve interface (11), a degassing valve (12) and a degassing interface (13); The ventilation block (1) further comprises a third six-way valve channel (109) and a degassing channel (110), wherein the third six-way valve channel (109) is connected to the third six-way valve interface (11), the degassing channel (110) is connected to the third six-way valve channel (109) through the degassing valve (12), and the degassing channel (110) is connected to the degassing interface (13).

5. The ventilation block device according to claim 4, characterized in that It also includes a first muffler (14); the ventilation block (1) also has a first muffler channel (111); The degassing valve (12) comprises a two-position three-way valve, the common port of the degassing valve (12) is connected to the third six-way valve channel (109), the opening of the degassing valve (12) is connected to the degassing channel (110), and the closed port of the degassing valve (12) is connected to the first muffler (14) through the first muffler channel (111).

6. The ventilation block device according to claim 1, characterized in that It also includes a first pressure stabilizing valve interface (15) and a second pressure stabilizing valve interface (16); The ventilation block (1) further comprises a pressure stabilizing channel (112); the carrier gas channel (106) is connected to the pressure stabilizing channel (112) via the carrier gas valve (4); the pressure stabilizing channel (112) is connected to the first pressure stabilizing valve interface (15); and the branch channel (105) is connected to the second pressure stabilizing valve interface (16).

7. The ventilation block device according to claim 1, characterized in that Also includes a third control valve (17) and a fourth control valve (18); The ventilation block (1) further comprises a first transfer channel (113) and a second transfer channel (114); the first transfer channel (113) is connected to the second six-way valve channel (103) through the first control valve (3), and the first transfer channel (113) is connected to the first multiplexing channel (104) through the third control valve (17); the second transfer channel (114) is connected to the chromatographic analysis channel (108) through the second control valve (5), and the second transfer channel (114) is connected to the second multiplexing channel (107) through the fourth control valve (18).

8. The ventilation block device according to claim 7, characterized in that It also includes a second muffler (19) and a third muffler (20); the ventilation block (1) also has a second muffler channel (115) and a third muffler channel (116); The first control valve (3) comprises a two-position three-way valve, and the common port of the first control valve (3) is connected to the second six-way valve channel (103); The second control valve (5) comprises a two-position three-way valve, and the closed end of the second control valve (5) is connected to the chromatographic analysis channel (108); The third control valve (17) comprises a two-position three-way valve, the common port of the third control valve (17) is connected to the closed port of the first control valve (3), the opening of the third control valve (17) is connected to the first reuse channel (104), and the closed port of the third control valve (17) is connected to the second muffler (19) through the second muffler channel (115); The fourth control valve (18) comprises a two-position three-way valve, the closed port of the fourth control valve (18) is connected to the second reuse channel (107), the common port of the fourth control valve (18) is connected to the common port of the second control valve (5), and the opening of the fourth control valve (18) is connected to the third muffler (20) through the third muffler channel (116).

9. The ventilation block device according to any one of claims 1 to 8, characterized in that: The ventilation block (1) is a ventilation block made of an aluminum block; the ventilation block (1) has a first side surface (117) and a second side surface (118) facing each other, and a third side surface (119) and a fourth side surface (120) respectively connected between the first side surface (117) and the second side surface (118); The standard gas channel (101) and the carrier gas channel (106) are connected to the first side surface (117); The calibration gas valve (2), the carrier gas valve (4) and the second control valve (5) are arranged on the third side (119); The first six-way valve channel (102), the second six-way valve channel (103) and the chromatographic analysis channel (108) are connected to the second side surface (118); The first control valve (3) is arranged on the fourth side surface (120); The passage of the ventilation block (1) comprises a straight hole with a hole diameter of ≤2 mm or a plurality of straight holes with a hole diameter of ≤2 mm that intersect each other perpendicularly.

10. A gas chromatograph, characterized in that include: Chromatographic column (301); Detector (302); Six-way valve (200); as well as The ventilation block device (100) according to any one of claims 1 to 9, wherein the ventilation block device (100) is connected to the six-way valve (200) and the chromatographic column (301) respectively.

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