Methanol collection device and methanol detection system
By using hydrophobic and methanol permeable membranes to isolate water molecules in the methanol collection device, the problem of water vapor affecting the detection accuracy during methanol collection is solved, and high-precision methanol concentration detection is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU HEFENG ENVIRONMENT SCI & TECH
- Filing Date
- 2025-04-23
- Publication Date
- 2026-04-21
AI Technical Summary
Existing methanol collection devices are prone to generating water vapor during the collection process, resulting in low methanol detection accuracy.
A sampling end cap connects the inlet pipe and the outlet pipe, and a hydrophobic permeable membrane and a methanol permeable membrane are installed at the sampling port. The hydrophobic permeable membrane isolates water molecules and only allows methanol molecules to pass through, which are then carried into the outlet pipe by the carrier gas.
This significantly reduces the generation of water vapor during the collection process and improves the accuracy of methanol concentration detection.
Smart Images
Figure CN224152122U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of detection technology, and in particular to a methanol collection device and methanol collection system. Background Technology
[0002] In genetic engineering, high-density fed-batch fermentation processes involving gene recombination are primarily used to obtain large quantities of valuable proteins. Dimethylamine-based yeast expression systems are among the most widely used exogenous gene expression systems. During the expression phase of the fermentation process in a dimethylamine-based yeast expression system, methanol needs to be continuously fed as an inducer. Simultaneously, methanol also provides the cells with carbon and energy; therefore, effective control of the methanol concentration is crucial.
[0003] However, existing collection devices for detecting methanol concentration in solutions inevitably generate water vapor during the collection process, resulting in low detection accuracy for methanol.
[0004] Therefore, there is an urgent need for a methanol collection device and methanol detection system to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a methanol collection device and a methanol detection system to solve the technical problem in the prior art where water vapor inevitably affects the detection accuracy of methanol during collection.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] On the one hand, a methanol collection device is provided, comprising:
[0008] The sampling rod has an inlet pipe and an outlet pipe that extend along its axis and pass through it.
[0009] A sampling end cap is connected to one end of the sampling rod and connects the air outlet of the air inlet pipe and the air inlet of the air outlet pipe. A sampling port is provided on the sampling end cap. A hydrophobic permeable membrane and a methanol permeable membrane are provided at the sampling port.
[0010] The inlet of the inlet pipe is configured to be connected to a gas source that provides carrier gas; the carrier gas is used to deliver methanol entering the sampling end cap to the inlet of the outlet pipe.
[0011] Optionally, it also includes a metal mesh disposed on the hydrophobic permeable membrane or the methanol permeable membrane.
[0012] Optionally, the sampling rod and the sampling end cap are detachably connected, and a first sealing element is provided between the sampling rod and the sampling end cap.
[0013] Optionally, it also includes a sampling rod inner core, wherein a first inner cavity extending along its own axial direction is provided through the sampling rod, the sampling rod inner core is disposed in the first inner cavity, the air inlet pipe and the air outlet pipe are both disposed through the sampling rod inner core, and the sampling rod inner core, the sampling rod and the sampling end cap form a channel connecting the air inlet pipe and the air outlet pipe.
[0014] Optionally, a second sealing element is provided between the air inlet pipe and the inner core of the sampling rod, and between the air outlet pipe and the inner core of the sampling rod.
[0015] Optionally, a limiting protrusion is provided on one of the sampling rod inner core and the sampling rod, and a limiting groove is provided on the other to engage with the limiting protrusion, so as to prevent the limiting protrusion from moving away from the sampling end cap.
[0016] Optionally, it also includes a handle disposed at one end of the sampling rod away from the sampling end cap.
[0017] Optionally, the first end of the handle is sleeved on the sampling rod, the air inlet pipe and the air outlet pipe pass through the second end of the handle, and a third sealing element is provided between the air inlet pipe and the handle and between the air outlet pipe and the handle.
[0018] Optionally, a fourth sealing element is fitted onto the sampling rod, with one side of the fourth sealing element closely attached to the handle.
[0019] On the other hand, a methanol detection system is provided, including a detector and the aforementioned methanol collection device, wherein the outlet of the outlet pipe of the methanol collection device is connected to the detector.
[0020] The beneficial effects of this utility model are:
[0021] This novel methanol collection device connects the inlet and outlet pipes inside the sampling rod via a sampling end cap. A hydrophobic permeable membrane and a methanol permeable membrane are installed at the sampling port of the sampling end cap. When the sampling end cap is placed in the solution to be tested, the hydrophobic permeable membrane isolates water molecules from the solution, allowing only methanol molecules to enter between the sampling end cap and the sampling rod. These methanol molecules are then carried by the carrier gas introduced from the inlet pipe to the inlet of the outlet pipe, significantly reducing the generation of water vapor during the collection process.
[0022] The methanol detection system provided by this utility model, through the methanol collection device described above, greatly reduces the generation of water vapor during the collection process and effectively improves the accuracy of methanol concentration detection. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.
[0024] Figure 1 This is a cross-sectional view of the data acquisition device provided in this embodiment of the utility model;
[0025] Figure 2 yes Figure 1 Enlarged view of point A in the middle;
[0026] Figure 3 This is a partial cross-sectional view of the sampling rod provided in this embodiment of the utility model;
[0027] Figure 4 yes Figure 1 Enlarged view of point B in the middle;
[0028] Figure 5 This is a cross-sectional view of the inner core of the sampling rod provided in this embodiment of the utility model.
[0029] In the picture:
[0030] 1. Sampling rod; 11. Inlet pipe; 12. Outlet pipe; 13. First inner cavity; 14. Limiting groove;
[0031] 2. Sampling end cap; 21. Sampling port; 22. Hydrophobic permeable membrane; 23. Methanol permeable membrane;
[0032] 3. Metal mesh;
[0033] 4. First sealing element;
[0034] 5. Sampling rod inner core; 51. Fixing groove; 52. Protrusion;
[0035] 6. Second sealing element;
[0036] 7. Handle;
[0037] 8. Third sealing element;
[0038] 9. Fourth sealing element. Detailed Implementation
[0039] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.
[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Specifically, the terms "first position" and "second position" refer to two different positions.
[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0042] This utility model discloses a methanol collection device, such as Figure 1 and Figure 2 As shown, the methanol sampling device includes a sampling rod 1 and a sampling end cap 2. The sampling rod 1 has an inlet pipe 11 and an outlet pipe 12 extending axially and passing through it. The sampling end cap 2 is connected to one end of the sampling rod 1 and connects the outlet of the inlet pipe 11 and the inlet of the outlet pipe 12. A sampling port 21 is provided on the sampling end cap 2. A hydrophobic permeable membrane 22 and a methanol permeable membrane 23 are provided at the sampling port 21. The inlet of the inlet pipe 11 is configured to connect to a carrier gas source, which is used to transport the methanol entering the sampling end cap 2 to the inlet of the outlet pipe 12.
[0043] Understandable, Figure 1The arrows indicate the flow direction of the carrier gas. The hydrophobic permeation membrane 22 is a membrane layer that blocks water but allows gas to pass through. Volatile methanol can pass through the hydrophobic permeation membrane 22 to reach the methanol permeation membrane 23. The hydrophobic permeation membrane 22 and the methanol permeation membrane 23 can be located on opposite sides of the sampling port 21 of the sampling end cap 2, or they can be located on the same side. The hydrophobic permeation membrane 22 can be located on the outer side of the methanol permeation membrane 23 (i.e., the side closer to the test solution) or on the inner side of the methanol permeation membrane 23 (i.e., the side farther from the test solution).
[0044] Specifically, such as Figure 2 As shown, in this embodiment, the hydrophobic permeable membrane 22 and the methanol permeable membrane 23 are stacked sequentially on the side of the sampling end cap 2 away from the solution to be tested.
[0045] The methanol collection device provided by this utility model connects the inlet pipe 11 and the outlet pipe 12 inside the sampling rod 1 through the sampling end cap 2. A hydrophobic permeable membrane 22 and a methanol permeable membrane 23 are provided at the sampling port 21 of the sampling end cap 2. After the sampling end cap 2 is placed in the solution to be tested, the hydrophobic permeable membrane 22 can isolate water molecules in the solution, so that only methanol molecules can enter between the sampling end cap 2 and the sampling rod 1 and be carried by the carrier gas introduced from the inlet pipe 11 to the inlet of the outlet pipe 12. This greatly reduces the generation of water vapor during the collection process and avoids affecting the accuracy of subsequent methanol concentration checks.
[0046] Furthermore, to improve the structural strength of the hydrophobic permeation membrane 22 and the methanol permeation membrane 23, the methanol collection device also includes a metal mesh 3, which is disposed on the hydrophobic permeation membrane 22 or the methanol permeation membrane 23. By using the metal mesh 3 as a supporting framework for the hydrophobic permeation membrane 22 and the methanol permeation membrane 23, tearing of the membrane material due to vibration caused by the movement of the carrier gas can be effectively prevented. Specifically, in this embodiment, the metal mesh 3 is a stainless steel mesh, such as... Figure 2 As shown, the hydrophobic permeation membrane 22 is disposed on the sampling end cap 2, the methanol permeation membrane 23 is laid on the hydrophobic permeation membrane 22, and the metal mesh 3 is laid on the methanol permeation membrane 23. This arrangement ensures that the metal mesh 3 is located on the side of the methanol permeation membrane 23 facing the carrier gas, which can further prevent the methanol permeation membrane 23 and the hydrophobic permeation membrane 22 from tearing due to vibration caused by the movement of the carrier gas, and effectively ensure the structural stability of the methanol permeation membrane 23 and the hydrophobic permeation membrane 22 during long-term operation.
[0047] Furthermore, to facilitate the production of the methanol collection device and the replacement of the methanol permeation membrane 23 or the hydrophobic permeation membrane 22 during long-term use and aging, the sampling rod 1 and the sampling end cap 2 are detachably connected, and a first sealing element 4 is provided between the sampling rod 1 and the sampling end cap 2. Specifically, in some embodiments, one of the sampling rod 1 and the sampling end cap 2 is provided with an external thread, and the other is provided with a threaded hole that is threadedly connected to the external thread.
[0048] In some other embodiments, the sampling rod 1 and the sampling end cap 2 can be snapped together and fixed.
[0049] More specifically, such as Figure 1 and Figure 2 As shown, in this embodiment, the sampling rod 1 is provided with an external thread, and a first sealing element 4 is fitted at the end of the external thread of the sampling rod 1 away from the sampling end cap 2. The first sealing element 4 is a rubber ring. The sampling end cap 2 is provided with a threaded hole that is threadedly connected to the external thread. When the sampling end cap 2 is threadedly connected to the sampling rod 1, the first sealing element 4 can seal the gap between the sampling end cap 2 and the sampling rod 1, preventing the solution to be tested from being transported to the gas outlet pipe 12 through the gap between the sampling end cap 2 and the sampling rod 1 when the sampling end cap 2 is placed in it, thus preventing the subsequent detection results of methanol concentration from being inaccurate. Furthermore, a first sealing element 4 is also provided at the bottom of the threaded hole of the sampling end cap 2. It can be understood that both the sampling end cap 2 and the sampling rod 1 are provided with clearance grooves at the installation position of the first sealing element 4. This arrangement ensures that both ends of the threaded connection between the sampling end cap 2 and the sampling rod 1 are sealed by the first sealing element 4, greatly reducing the possibility of the solution to be tested entering from the gap.
[0050] Furthermore, the outer diameter of the sampling end cap 2 is the same as the outer diameter of the portion of the sampling rod 1 without external threads. Chamfers are provided on the inner side of the threaded hole of the sampling end cap 2 and at the end of the external threads on the sampling rod 1. This design not only facilitates the threaded connection between the sampling end cap 2 and the sampling rod 1, but also ensures that the outer surfaces of the sampling end cap 2 and the sampling rod 1 are flush after connection, which helps reduce the gaps between them where the solution to be tested may adhere.
[0051] In some specific embodiments, such as Figure 2 and Figure 3 As shown, the methanol collection device also includes a sampling rod core 5. A first inner cavity 13 extending axially through the sampling rod 1 is provided. The sampling rod core 5 is located within the first inner cavity 13. Both the inlet pipe 11 and the outlet pipe 12 pass through the sampling rod core 5. The sampling rod core 5, the sampling rod 1, and the sampling end cap 2 form a channel connecting the inlet pipe 11 and the outlet pipe 12. It is understood that the sampling rod core 5 allows the sampling rod 1 to be hollow, reducing weight and facilitating the use of the methanol collection device by operators. Simultaneously, it facilitates the replacement of the inlet pipe 11 and outlet pipe 12 if a malfunction occurs and carrier gas cannot be introduced. Furthermore, the sampling rod core 5 can fix the position of the inlet pipe 11 and outlet pipe 12 within the first inner cavity 13, preventing movement of the inlet pipe 11 and outlet pipe 12 due to carrier gas pressure when carrier gas is introduced.
[0052] Furthermore, to prevent methanol molecules or carrier gas passing through the hydrophobic permeation membrane 22 and the methanol permeation membrane 23 from escaping through the gaps between the sampling rod core 5 and the inlet pipe 11 and the outlet pipe 12, a second sealing element 6 is provided between the inlet pipe 11 and the sampling rod core 5, and between the outlet pipe 12 and the sampling rod core 5.
[0053] Specifically, such as Figure 4 As shown, the sampling rod inner core 5 has two fixing grooves 51 coaxial with the air inlet pipe 11 and the air outlet pipe 12, respectively. Each fixing groove 51 contains the aforementioned second sealing element 6. When the air inlet pipe 11 and the air outlet pipe 12 pass through the sampling rod inner core 5, the second sealing element 6 can fill the gaps between the air inlet pipe 11 and the sampling rod inner core 5, as well as the gaps between the air outlet pipe 12 and the sampling rod inner core 5. More specifically, in this embodiment, the second sealing element 6 is a silicone sealing ring.
[0054] Furthermore, in order to better limit the position of the air inlet pipe 11 and the air outlet pipe 12 relative to the sampling end cover 2, a protrusion 52 is provided on one of the sampling rod inner core 5 and the sampling rod 1, and a limiting groove 14 is provided on the other to engage with the limiting protrusion 52, so as to prevent the protrusion 52 from moving away from the sampling end cover 2.
[0055] Specifically, such as Figure 4 As shown, in this embodiment, a protruding ring is provided on the inner core 5 of the sampling rod, and a limiting groove 14 is provided on the sampling rod 1. After the inner core 5 of the sampling rod is inserted into the first inner cavity 13, it can be positioned near the sampling end cap 2 under the action of the limiting groove 14. This arrangement can restrict the inner core 5 of the sampling rod to the end near the sampling end cap 2, which on the one hand can better restrict the position of the inlet pipe 11 and the outlet pipe 12, preventing the inlet pipe 11 and the outlet pipe 12 from moving due to the carrier gas and causing physical damage to the methanol permeation membrane 23 and the hydrophobic permeation membrane 22. On the other hand, fixing the inlet pipe 11 and the outlet pipe 12 near the methanol permeation membrane 23 and the hydrophobic permeation membrane 22 is conducive to the stability of the carrier gas flow, preventing the unstable carrier gas flow from affecting the operation of the methanol permeation membrane 23 and the hydrophobic permeation membrane 22. At the same time, it allows the methanol collection device to select inlet pipes 11 and outlet pipes 12 of different sizes and sampling rod inner cores 5 of different sizes according to needs.
[0056] Furthermore, to facilitate the use of the methanol collection device, the methanol collection device also includes a handle 7, which is located at the end of the sampling rod 1 away from the sampling end cap 2.
[0057] Specifically, in this embodiment, such as Figure 1 and Figure 4As shown, the first end of the handle 7 is threaded onto the end of the sampling rod 1 furthest from the sampling end cap 2, and can seal the first inner cavity 13. The inlet pipe 11 and the outlet pipe 12 pass through the second end of the handle 7. A first sealing element 4 is also provided between the handle 7 and the sampling rod 1. It can be understood that both the handle 7 and the sampling rod 1 are provided with clearance grooves at the installation position of the first sealing element 4. This arrangement can prevent the methanol collection device from being inserted too deeply into the solution to be tested, and thus prevent the solution to be tested from entering the first inner cavity 13 through the gap between the handle 7 and the sampling rod 1, which would damage the inlet pipe 11 or the outlet pipe 12 and the inner core 5 of the sampling rod.
[0058] Furthermore, to facilitate gripping the handle 7, the outer surface of the handle 7 is treated with an anti-slip coating. Specifically, in this embodiment, a knurled texture is provided on the outer surface of the handle 7. By providing the knurled texture, the friction of the contact surface can be significantly increased, preventing the methanol collection device from slipping during operation.
[0059] Furthermore, the first end of the handle 7 is sleeved on the sampling rod 1, and the air inlet pipe 11 and the air outlet pipe 12 pass through the second end of the handle 7. A third sealing element 8 is provided between the air inlet pipe 11 and the handle 7, and between the air outlet pipe 12 and the handle 7. In this embodiment, as... Figure 3 and Figure 4 As shown, the handle 7 has two fixing grooves 51 coaxial with the inlet pipe 11 and the outlet pipe 12, respectively. The third sealing member 8 is disposed in the corresponding fixing groove 51. When the inlet pipe 11 and the outlet pipe 12 pass through the handle 7, the third sealing member 8 can fill the gap between the inlet pipe 11 and the handle 7, and the gap between the outlet pipe 12 and the handle 7. This arrangement can prevent the methanol collection device from being completely immersed in the test solution, causing the test solution to enter the first inner cavity 13 through the gap between the handle 7 and the inlet pipe 11 and the outlet pipe 12, thus preventing damage to the inlet pipe 11 or the outlet pipe 12 and the sampling rod inner core 5. More specifically, in this embodiment, the third sealing member 8 and the second sealing member 6 are both silicone sealing rings.
[0060] Furthermore, a fourth sealing element 9 is fitted onto the sampling rod 1, with one side of the fourth sealing element 9 tightly abutting the handle 7. It is understood that the outer diameter of the handle 7 is larger than the outer diameter of the sampling rod 1. This arrangement not only facilitates the operator's grip on the handle 7, but also allows the shoulder formed between the handle 7 and the sampling rod 1 to allow the sampling rod 1 to be hooked. However, the solution to be tested easily adheres to the gap between the handle 7 and the sampling rod 1. Therefore, in this embodiment, as... Figure 5 As shown, a fourth sealing element 9 is fitted on the sampling rod 1. One side of the fourth sealing element 9 can fit tightly against the handle 7, blocking the gap between the handle 7 and the sampling rod 1, further preventing the solution to be tested from entering.
[0061] This utility model also provides a methanol detection system, including a detector and the aforementioned methanol collection device, wherein the outlet of the methanol collection device's outlet pipe 12 is connected to the detector. Since the methanol detection system provided by this utility model has the aforementioned methanol collection device, it possesses at least the beneficial effects of the aforementioned methanol collection device, which will not be repeated here.
[0062] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A methanol collection device, characterized by, include: The sampling rod (1) is provided with an air inlet pipe (11) and an air outlet pipe (12) that extend along its axis and pass through it. A sampling end cap (2) is connected to one end of the sampling rod (1) and connects the air outlet of the air inlet pipe (11) and the air inlet of the air outlet pipe (12). A sampling port (21) is provided on the sampling end cap (2). A hydrophobic permeable membrane (22) and a methanol permeable membrane (23) are provided at the sampling port (21). The inlet of the inlet pipe (11) is configured to be connected to a gas source that provides carrier gas; the carrier gas is used to deliver methanol entering the sampling end cap (2) to the inlet of the outlet pipe (12).
2. The methanol collection device of claim 1, wherein, It also includes a metal mesh (3), which is disposed on the hydrophobic permeable membrane (22) or the methanol permeable membrane (23).
3. The methanol collection device of claim 1, wherein, The sampling rod (1) and the sampling end cap (2) are detachably connected, and a first sealing element (4) is provided between the sampling rod (1) and the sampling end cap (2).
4. The methanol collection device according to claim 1, characterized in that, It also includes a sampling rod core (5), in which a first inner cavity (13) extending along its own axis is provided. The sampling rod core (5) is disposed in the first inner cavity (13). The air inlet pipe (11) and the air outlet pipe (12) are both inserted through the sampling rod core (5). The sampling rod core (5), the sampling rod (1), and the sampling end cap (2) form a channel connecting the air inlet pipe (11) and the air outlet pipe (12).
5. The methanol collection device of claim 4, wherein, A second sealing element (6) is provided between the air inlet pipe (11) and the inner core of the sampling rod (5), and between the air outlet pipe (12) and the inner core of the sampling rod (5).
6. The methanol collection device of claim 4, wherein, One of the sampling rod inner core (5) and the sampling rod (1) is provided with a limiting protrusion (52), and the other is provided with a limiting groove (14) that engages with the limiting protrusion (52) to prevent the limiting protrusion (52) from moving away from the sampling end cap (2).
7. The methanol collection device of claim 4, wherein, It also includes a handle (7), which is located at one end of the sampling rod (1) away from the sampling end cap (2).
8. The methanol collection device of claim 7, wherein, The first end of the handle (7) is sleeved on the sampling rod (1), and the air inlet pipe (11) and the air outlet pipe (12) pass through the second end of the handle (7); A third sealing element (8) is provided between the air inlet pipe (11) and the handle (7), and between the air outlet pipe (12) and the handle (7).
9. The methanol collection device of claim 7, wherein, The sampling rod (1) is fitted with a fourth sealing element (9), and one side of the fourth sealing element (9) is in close contact with the handle (7).
10. A methanol detection system characterized by, It includes a detector and a methanol collection device according to any one of claims 1-9, wherein the outlet of the outlet pipe (12) of the methanol collection device is connected to the detector.