Internal standard substance filling device and gas storage system

Abstract

The utility model relates to the technical field of sample storage, in particular to an internal standard substance filling device and a gas storage system. The internal standard substance filling device comprises a multi-way valve and a quantitative element. The multi-way valve is provided with a first port, a second port, a third port, a fourth port, a fifth port, a sixth port, a first channel, a second channel and a third channel, the first channel, the second channel and the third channel can be switched, the second port is used for introducing an internal standard substance, the third port is used for discharging the internal standard substance, the fifth port is used for being communicated with a sampling tank, and the sixth port is used for introducing a sample; the dosing element is connected between the first port and the fourth port. According to the internal standard substance filling device and the gas storage system provided by the utility model, the sample loss rate of the sample in the collection process, the transportation process and the storage process can be accurately and geologically controlled by detecting the internal standard substance; the same tank body is used for quality control and sampling, so that not only is the operation simple, but also the measurement accuracy is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sample storage technical field especially, relate to a kind of internal standard substance filling device and gas storage system. BACKGROUND

[0002] Volatile Organic Compounds (Volatile Organic Compounds, hereinafter referred to as: VOCs) need special sampling tank for storage and transportation. The sampling tank adds pre-concentration method to analyze volatile organic compounds in environmental air, which has the advantages of simple sampling process, multiple analysis components, controllable sampling time, etc. and is widely used. When using sampling tube to collect samples to test VOCs, the loss degree of the sample in the collection, transportation and storage process and the loss degree in the concentration process and analysis process need to be characterized. Therefore, a known concentration of internal standard substance needs to be added to the tank to characterize the loss rate of the sample through the same steps and processes.

[0003] In the process of analyzing VOCs by using a concentrator and GCMS (i.e. gas chromatography-mass spectrometry), the internal standard is used for quality control of sample loss rate. However, the internal standard addition method used in VOCs concentration analysis method can only control the loss of measured substances in the concentration process of the concentration device and the analysis process of the GCMS system, and the loss of the sample in the storage process in the sampling tank cannot be controlled. The standard requires transportation standard gas quality control and transportation blank quality control, which can control the loss of measured substances in the transportation process to a certain extent, but the operation process is complex, and the quality control tank and the sampling tank are not the same tank body, which has measurement deviation. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of internal standard substance filling device and gas storage system to solve the defect that there is operation process complex and measurement deviation when detecting the loss of measured substance in sampling tank in prior art.

[0005] The utility model provides a kind of internal standard substance filling device, comprising:

[0006] The multi-way valve has a first port, a second port, a third port, a fourth port, a fifth port and a sixth port, and switchable first, second and third channels. The second port is used to introduce internal standard substance, the third port is used to discharge internal standard substance, the fifth port is used to communicate with the sampling tank, and the sixth port is used to introduce sample. The first channel switchably communicates the first port with the second port or the second port with the third port. The second channel switchably communicates the third port with the fourth port or the fourth port with the fifth port. The third channel switchably communicates the fifth port with the sixth port or the sixth port with the first port.

[0007] A quantitative element, connected to the first port and the fourth port, is used to deliver a quantitative internal standard.

[0008] The internal standard filling device provided by this utility model further includes: a switch valve, disposed at the third port, for controlling the on / off state of the third port.

[0009] According to the internal standard filling device provided by this utility model, the inner walls of the first port, the second port, the third port, the fourth port, the fifth port and the sixth port, the first channel, the second channel and the third channel are all coated with an inert material.

[0010] According to the internal standard filling device provided by this utility model, the quantitative element includes a quantitative ring.

[0011] According to the internal standard filling device provided by this utility model, the multi-way valve includes a six-way valve.

[0012] According to the internal standard filling device provided by this utility model, when the multi-way valve is in the first state, the third port is closed, and the first channel is rotated to connect the first port and the second port, the second channel is rotated to connect the third port and the fourth port, and the third channel is rotated to connect the fifth port and the sixth port;

[0013] When the multi-way valve is in the second state after the first state, the third port is opened to fill the metering element with internal standard.

[0014] According to the internal standard filling device provided by this utility model, when the multi-way valve is in the third state after the second state, the third port is closed, and the fifth port is connected to the sampling tank;

[0015] When the multi-way valve is in the fourth state after the third state, the first channel is rotated to connect the second port and the third port, the second channel is rotated to connect the fourth port and the fifth port, and the third channel is rotated to connect the sixth port and the first port, so that the internal standard in the quantitative element is introduced into the sampling container.

[0016] According to the internal standard filling device provided by this utility model, when the multi-way valve is in the fifth state after the fourth state, the first channel is rotated to connect the first port and the second port, the second channel is rotated to connect the third port and the fourth port, and the third channel is rotated to connect the fifth port and the sixth port. The sample is then introduced into the sampling container through the sixth port and the fifth port in sequence.

[0017] The utility model also provides a kind of gas storage system, comprising: sampling tank, internal standard tank and the internal standard substance filling device of the utility model, the sampling tank is connected with the fifth port, the internal standard tank is connected with the second port.

[0018] According to the gas storage system provided by the utility model, further comprising: a connecting pipe connected between the sampling tank and the fifth port, and the pipe wall of the connecting pipe has an inert material coating.

[0019] The internal standard substance filling device provided by the utility model comprises a multi-way valve and a quantitative element. The multi-way valve has a first port, a second port, a third port, a fourth port, a fifth port and a sixth port, and switchable first, second and third channels. The second port is used for introducing internal standard substances, the third port is used for discharging internal standard substances, the fifth port is used for communicating with a sampling tank, and the sixth port is used for introducing samples. The first channel switchably communicates the first port with the second port or the second port with the third port, the second channel switchably communicates the third port with the fourth port or the fourth port with the fifth port, and the third channel switchably communicates the fifth port with the sixth port or the sixth port with the first port. The quantitative element is connected between the first port and the fourth port and is used for conveying a quantitative amount of internal standard substances. It can be seen that the internal standard substance filling device provided by the utility model can accurately control the sample loss rate of a sample in the collection process, the transportation process and the storage process by detecting internal standard substances, thereby making up for the shortcomings of the current sample loss rate method, which can only control the loss rate of measured substances in the concentration process and the analysis process. Moreover, the same tank body is used for quality control and sampling, so that the operation is simple, and the deviation caused by the use of different tanks for samples and internal standards in the existing quality control method is avoided, thereby improving the measurement accuracy.

[0020] Further, the gas storage system provided by the utility model comprises the internal standard substance filling device in the above-mentioned embodiments of the utility model, and therefore has the same advantages as above. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0022] Figure 1 is the structural schematic diagram of the internal standard substance filling device provided in one of the embodiments of the utility model in the first state.

[0023] Figure 2 is the structural schematic diagram of the internal standard substance filling device provided in one of the embodiments of the utility model in the fourth state.

[0024] Figure 3 is a structural schematic view of a gas storage system provided in one embodiment of the present application.

[0025] Reference signs:

[0026] 1: multi-way valve; 11: first port; 12: second port; 13: third port; 14: fourth port; 15: fifth port; 16: sixth port; 17: first channel; 18: second channel; 19: third channel; 2: dosing element; 3: on-off valve; 4: sampling tank; 5: internal standard tank; 6: connecting pipe. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0028] In the description of the present embodiment, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present embodiment.

[0029] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present embodiment, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0030] In this embodiment, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect", "fix" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this embodiment can be understood according to the specific circumstances.

[0031] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0032] The embodiments of the present application will be described below Figure 1 and Figure 2 A kind of internal standard filling device is described in the embodiments of the present application. The internal standard filling device includes: multi-way valve 1 and quantitative element 2.

[0033] Wherein, multi-way valve 1 has first port 11, second port 12, third port 13, fourth port 14, fifth port 15 and sixth port 16 and switchable first channel 17, second channel 18 and third channel 19, second port 12 is used to enter internal standard, third port 13 is used to discharge internal standard, fifth port 15 is used to communicate with sampling tank 4, sixth port 16 is used to enter sample, first channel 17 is switchably connected first port 11 with second port 12 or second port 12 with third port 13, second channel 18 is switchably connected third port 13 with fourth port 14 or fourth port 14 with fifth port 15, third channel 19 is switchably connected fifth port 15 with sixth port 16 or sixth port 16 with first port 11. Quantitative element 2 is connected with first port 11 and fourth port 14, for conveying quantitative internal standard.

[0034] Specifically, the first port 11 is in communication with the fourth port 14 under the action of the quantitative element 2, the internal standard quantitative delivery can be realized, thereby improving the accuracy and repeatability of the analysis result; the internal standard tank 5 can be used to store high-concentration internal standard, the pressure is higher than 20 psia, and the pressure of the internal standard in the internal standard tank 5 can be increased according to the actual demand; the second port 12 of the multi-way valve 1 is connected with the internal standard tank 5, and the internal standard is introduced into the second port 12 through the internal standard tank 5; the third port 13 is an internal standard discharge port; the fifth port 15 is a sample inlet; and the sixth port 16 is in communication with the sampling tank 4, and the internal standard and the sample can be introduced into the sampling tank 4.

[0035] When the quantitative element 2 is arranged, and by switching the connection relationship of the first channel 17 and the second channel 18, the internal standard can be delivered through the second port 12, the first channel 17, the quantitative element 2, the fourth port 14 and the third port 13, and the internal standard is ensured to fill in the quantitative element 2. Then, by switching again, the internal standard can be delivered through the quantitative element 2, the fourth port 14 and the fifth port 15 into the sampling tank 4. Finally, by switching the third channel 19, the sample is delivered through the sixth port 16 and the fifth port 15 into the sampling tank 4, so that the sampling tank 4 is filled with the sample and the internal standard. By detecting the internal standard, the sample loss rate of the sample in the collection process, the transportation process and the storage process is accurately controlled, and the shortcomings that the current sample loss rate method can only control the loss rate of the measured substance in the concentration process and the analysis process are overcome. Moreover, the same tank body is used for quality control and sampling, the operation is simple, and the deviation caused by the use of different tanks for the sample and the internal standard in the existing quality control method is avoided, and the measurement accuracy is improved.

[0036] In an embodiment of the utility model, the internal standard filling device further includes: a switch valve 3 arranged at the third port 13, used for controlling the on-off of the third port 13, and the discharge of the internal standard can be controlled through the switch valve 3. Preferably, the switch valve 3 can adopt an electromagnetic valve.

[0037] In an embodiment of the utility model, the inner walls of the first port 11, the second port 12, the third port 13, the fourth port 14, the fifth port 15 and the sixth port 16, the first channel 17, the second channel 18 and the third channel 19 are all provided with inert material coating, so as to reduce the adsorption of the sample and the internal standard. The inert material coating is, for example, polytetrafluoroethylene (PTFE) and its derivatives, ceramic coating, glass lining, metal oxide coating, silicone coating and the like, and the corresponding coating can be coated according to the actual need.

[0038] In one embodiment of this invention, the quantitative element 2 includes a quantitative loop. The quantitative loop (also called a sample loop) is mainly used in analytical instruments, such as high-performance liquid chromatography and gas chromatography equipment. Its main function is to ensure that the volume of each injection (internal standard) is precisely consistent, thereby improving the accuracy and repeatability of the analytical results.

[0039] In one embodiment of the present invention, the multi-port valve 1 includes a six-port valve having six ports and three flow channels for switching the port connection relationship.

[0040] In one embodiment of this utility model, when the multi-way valve 1 is in the first state, the third port 13 is closed, and the first channel 17 is rotated to connect the first port 11 and the second port 12, the second channel 18 is rotated to connect the third port 13 and the fourth port 14, and the third channel 19 is rotated to connect the fifth port 15 and the sixth port 16; when the multi-way valve 1 is in the second state after the first state, the third port 13 is opened, so that the internal standard fills the metering element 2.

[0041] In one embodiment of this utility model, when the multi-way valve 1 is in the third state after the second state, the third port 13 is closed and the fifth port 15 is connected to the sampling tank 4; when the multi-way valve 1 is in the fourth state after the third state, the first channel 17 is rotated to connect the second port 12 and the third port 13, the second channel 18 is rotated to connect the fourth port 14 and the fifth port 15, and the third channel 19 is rotated to connect the sixth port 16 and the first port 11, so that the internal standard in the quantitative element 2 is introduced into the sampling tank 4.

[0042] In one embodiment of the present invention, when the multi-way valve 1 is in the fifth state after the fourth state, the first channel 17 is rotated to connect the first port 11 and the second port 12, the second channel 18 is rotated to connect the third port 13 and the fourth port 14, and the third channel 19 is rotated to connect the fifth port 15 and the sixth port 16. The sample is then introduced into the sampling container 4 through the sixth port 16 and the fifth port 15 in sequence.

[0043] Based on the first to fifth states in the above embodiments, a method for using the internal standard filling device of this utility model is provided, wherein the internal standard is internal standard gas, the multi-way valve 1 is a six-way valve, and the metering element 2 is a metering ring, including the following steps:

[0044] S1. In the first state, the six-way valve is rotated to connect the first port 11 with the second port 12, the third port 13 with the fourth port 14, and the fifth port 15 with the sixth port 16 (i.e., ...). Figure 1 (As shown in the diagram), the switch valve 3 is in the closed state; the second port 12 is connected to the inner standard tank 5, and the outlet pressure of the inner standard tank 5 is set to 20 psia.

[0045] S2, in the second state, open the switch valve 3, replace the gas in the dosing ring, let the inside of the dosing ring be all internal standard gas.

[0046] S3, in the third state, close the switch valve 3, connect the sampling tank 4 with the fifth port 15;

[0047] S4, in the fourth state, the six-way valve rotates (in the state of Figure 1 , the valve core of the six-way valve can be rotated clockwise by 60° to the state of Figure 2 ) to the first port 11 and the sixth port 16 are communicated, the second port 12 and the third port 13 are communicated, the fourth port 14 and the fifth port 15 are communicated, the internal standard gas in the dosing ring enters into the sampling tank 4;

[0048] S5, in the fifth state, the six-way valve rotates to the first port 11 and the second port 12 are communicated, the third port 13 and the fourth port 14 are communicated, the fifth port 15 and the sixth port 16 are communicated, start sample collection, the sampling tank 4 is filled with sample and internal standard gas.

[0049] In the above process, it can be ensured that the internal standard is added in the sampling tank 4, and the internal standard and the sample have the same storage time.

[0050] When the internal standard filling device does not work, the six-way valve is in the closed position, and each port is not communicated, so that isolation with the outside is ensured.

[0051] As shown in Figure 3 , the utility model also provides a gas storage system, include: sampling tank 4, internal standard tank 5 and the internal standard filling device in the above embodiment of the utility model, sampling tank 4 is connected with the fifth port 15, and internal standard tank 5 is connected with the second port 12.

[0052] The gas storage system provided by the utility model has the same advantages as above because it includes the internal standard filling device in the above embodiment of the utility model.

[0053] In one embodiment of the utility model, the gas storage system further includes: a connecting pipe 6 connected between the sampling tank 4 and the fifth port 15, and the pipe wall of the connecting pipe 6 has an inert material coating. In addition, there is no other accessory between the sampling tank 4 and the internal standard filling device, so that adsorption caused by the accessory is avoided.

[0054] It should be finally pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been explained in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. An internal standard filling device, characterized in that, The utility model relates to a kind of gas sampling device, comprising: Multi-way valve (1), with first port (11), second port (12), third port (13), fourth port (14), fifth port (15) and sixth port (16) and switchable first channel (17), second channel (18) and third channel (19), the second port (12) is used to pass into internal standard, the third port (13) is used to discharge internal standard, the fifth port (15) is used to communicate with sampling tank (4), the sixth port (16) is used to pass into sample, the first channel (17) is switchably connected the first port (11) with the second port (12) or the second port (12) with the third port (13), the second channel (18) is switchably connected the third port (13) with the fourth port (14) or the fourth port (14) with the fifth port (15), the third channel (19) is switchably connected the fifth port (15) with the sixth port (16) or the sixth port (16) with the first port (11); Quantitative element (2) is connected with the first port (11) and the fourth port (14), for conveying quantitative internal standard.

2. The internal standard filling device of claim 1, wherein Further comprising: Switch valve (3) is arranged in the third port (13), for controlling the on-off of the third port (13).

3. The internal standard filling device of claim 1, wherein, The first port (11), the second port (12), the third port (13), the fourth port (14), the fifth port (15) and the sixth port (16), the first channel (17), the second channel (18) and the third channel (19) inner wall all have inert material coating.

4. The internal standard filling device of claim 1, wherein, The quantitative element (2) includes quantitative ring.

5. The internal standard filling device of claim 1, wherein, The multi-way valve (1) includes six-way valve.

6. The internal standard filling device according to any one of claims 1 to 5, characterized in that When the multi-way valve (1) is in the first state, the third port (13) is closed, and the first channel (17) is rotated to connect the first port (11) and the second port (12), the second channel (18) is rotated to connect the third port (13) and the fourth port (14), and the third channel (19) is rotated to connect the fifth port (15) and the sixth port (16); When the multi-way valve (1) is in the second state after the first state, the third port (13) is opened, and the internal standard fills the quantitative element (2).

7. The internal standard filling device of claim 6, wherein, When the multi-way valve (1) is in the third state after the second state, the third port (13) is closed, and the fifth port (15) is connected with the sampling tank (4); When the multi-way valve (1) is in the fourth state after the third state, the first channel (17) is rotated to connect the second port (12) and the third port (13), the second channel (18) is rotated to connect the fourth port (14) and the fifth port (15), and the third channel (19) is rotated to connect the sixth port (16) and the first port (11), so that the internal standard in the quantitative element (2) passes into the sampling tank (4).

8. The internal standard filling device of claim 7, wherein, In the fifth state after the multi-way valve (1) is in the fourth state, the first channel (17) is rotated to connect the first port (11) and the second port (12), the second channel (18) is rotated to connect the third port (13) and the fourth port (14), and the third channel (19) is rotated to connect the fifth port (15) and the sixth port (16), so that the sample is sequentially introduced into the sampling tank (4) from the sixth port (16) and the fifth port (15).

9. A gas storage system characterized by, It comprises: a sampling tank (4), an internal standard tank (5), and the internal standard filling device according to any one of claims 1 to 8, wherein the sampling tank (4) is connected to the fifth port (15), and the internal standard tank (5) is connected to the second port (12).

10. The gas storage system of claim 9, wherein, It further comprises: a connecting pipe (6) connected between the sampling tank (4) and the fifth port (15), and a pipe wall of the connecting pipe (6) is coated with an inert material.

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