Thermal desorption tube aging instrument

Abstract

The utility model belongs to the technical field of aging instrument equipment, and particularly relates to a thermal desorption tube aging instrument which comprises an aging oven, a heating module and a gas path system, the aging oven is of a split type and comprises a lower fixing box and an upper mounting cover. The upper mounting cover comprises a mounting plate, an arc-shaped groove and at least two hook parts; the arc-shaped groove is formed in the lower surface of the mounting plate and is used for embedding the adsorption pipe; the hook parts are distributed on the peripheral side of a notch of the arc-shaped groove and are used for jointly supporting the same adsorption pipe; the lower fixing box comprises a fixing plate and a groove formed in the upper surface of the fixing plate. According to the utility model, through the design of the split type aging oven, one lower fixing box corresponds to a plurality of upper mounting covers during actual aging operation, so that the purpose of quickly mounting / removing the adsorption tubes of the same upper mounting cover can be achieved no matter before cleaning or after cleaning, the preparation time before cleaning and after cleaning is greatly shortened, and the production efficiency is improved. The operation process is simplified, and meanwhile the working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of aging instrument equipment, specifically relating to a thermal desorption tube aging instrument. Background Technology

[0002] Adsorption tube sampling is an important method for constant-volume volatile organic compound (VOC) analysis. Sample gas is quantitatively drawn up by a constant-flow sampler at a constant flow rate and flows through the adsorption tube. The adsorbent material inside the tube adsorbs and enriches the VOCs in the sample gas, completing sample collection. The laboratory then desorbs the enriched sample from the tube using thermal desorption equipment and inputs it into a gas chromatography system for analysis. Adsorption tubes need to be reused, necessitating aging before each use. This aging process involves purging residual compounds from the adsorption tube under high temperature and a certain inert gas flow to ensure proper background. An aging instrument is required for this process.

[0003] Existing adsorption tube aging technologies primarily employ high-temperature heating combined with continuous high-purity nitrogen purging. This method carries the volatile organic compounds (VOCs) captured in the adsorption tube out through a high-temperature gas flow, achieving the purpose of aging and regeneration. For example, a smart desorption tube aging instrument disclosed in document CN209707222U includes a chassis, an aging furnace, and a gas path system. The gas path system includes a vent pipe and a solenoid valve, a first multi-port, and a second multi-port located within the chassis. The first and second multi-ports are respectively connected to both ends of the desorption tube. It also includes an air inlet, an exhaust outlet, a pressure gauge, a pressure regulating valve, and a touch screen connected to the controller, all located on the chassis shell. The chassis shell also has several air inlets and exhaust outlets; several air-blocking rods are located next to each air inlet and exhaust outlet.

[0004] This device can process one or more adsorption tubes as needed, offering good flexibility. However, when processing multiple adsorption tubes, they need to be placed / removed one by one from the aging furnace tank, which is not only cumbersome to operate manually, but also results in a long waiting time for the next batch of adsorption tubes, affecting efficiency. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this invention is to provide a thermal desorption tube aging instrument. Through the design of a split aging chamber, a lower fixed chamber is used to correspond to multiple upper mounting covers during actual aging operations. This allows for the quick installation / removal of adsorption tubes with the same upper mounting cover, both before and after cleaning. This significantly reduces preparation time before and after cleaning, simplifies the operation process, and improves work efficiency.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A thermal desorption tube aging instrument, comprising:

[0007] An aging chamber is used to hold adsorption tubes to be aged.

[0008] A heating module, located inside the aging chamber, is used to heat the adsorption tube;

[0009] A gas path system is connected to the adsorption tube to purge the adsorption tube;

[0010] The aging chamber is a split type, including a lower fixed chamber and an upper mounting cover;

[0011] The upper mounting cover includes a mounting plate, an arc-shaped groove on the lower surface of the mounting plate for embedding the adsorption tube, and at least two hooks distributed on the outer periphery of the arc-shaped groove for jointly supporting the same adsorption tube.

[0012] The lower fixing box includes a fixing plate and a groove provided on the upper surface of the fixing plate;

[0013] The diameter of the groove is greater than the maximum distance between the two hooks, and when the adsorption tube abuts against the arc groove, the distance by which the hook protrudes from the lower surface of the mounting plate is less than or equal to the depth of the groove.

[0014] As a further preferred embodiment of the present invention, the hook includes a vertical plate connected to the mounting plate, and an inclined plate disposed at the lower end of the vertical plate and abutting against the portion of the adsorption tube protruding from the lower surface of the mounting plate; the groove wall of the groove is formed with an inclined surface matching the inclined plate.

[0015] As a further preferred embodiment of this utility model, the hook and the mounting plate are connected by a limiting member; the limiting member includes a channel that passes through the mounting plate and corresponds one-to-one with the hook, a sliding rod that is slidably connected in the channel and connected to the hook, a lower protrusion and an upper protrusion provided on the inner wall of the channel, and a positioning protrusion provided on the sliding rod;

[0016] When the positioning protrusion engages with the lower protrusion, the hook supports the adsorption tube and there is a gap between the adsorption tube and the bottom surface of the arc-shaped groove; when the positioning protrusion engages with the upper protrusion, the hook supports the adsorption tube and the adsorption tube abuts against the bottom surface of the arc-shaped groove.

[0017] As a further preferred embodiment of this utility model, the maximum distance by which the upper protrusion protrudes from the inner wall of the channel is greater than the maximum distance by which the lower protrusion protrudes from the inner wall of the channel.

[0018] As a further preferred embodiment of the present invention, the upper protrusion includes a movable groove disposed on the inner wall of the channel, a movable column slidably connected in the movable groove, a support spring disposed on the bottom surface of the movable groove and connected to the movable column, and an arc-shaped protrusion disposed on the end of the movable column away from the support spring.

[0019] As a further preferred embodiment of the present invention, the limiting member further includes a horizontal plate disposed on the end of the sliding rod protruding from the upper surface of the mounting plate and parallel to the mounting plate, a mounting vertical plate disposed on the upper surface of the mounting plate and located at the side end of the horizontal plate, and a rotation limiting plate hinged to the mounting vertical plate.

[0020] When the hook supports the adsorption tube and there is a gap between the adsorption tube and the bottom surface of the arc-shaped groove, the rotation limiting plate is parallel to the horizontal plate and located at the upper end of the horizontal plate; when the hook supports the adsorption tube and the adsorption tube abuts against the bottom surface of the arc-shaped groove, the rotation limiting plate is perpendicular to or inclined to the horizontal plate, and the upper end of the horizontal plate is higher than the lower end of the rotation limiting plate.

[0021] As a further preferred embodiment of the present invention, the rotating limiting plate includes a side slot provided on the mounting vertical plate, a fixing rod provided on the side slot, a limiting plate body rotatably provided on the fixing rod, and an adjusting member for adjusting the rotation angle of the limiting plate body.

[0022] As a further preferred embodiment of this utility model, the adjusting component includes a torsion spring sleeved on the fixed rod, with one end connected to the limiting plate and the other end connected to the side slot; the torsion spring is used to keep the limiting plate parallel to the horizontal plate.

[0023] As a further preferred embodiment of the present invention, the adjusting member includes a plurality of insertion holes disposed on the groove wall of the side slot, a connecting hole disposed on the limiting plate, and a positioning rod passing through the connecting hole and connected to the insertion hole.

[0024] As a further preferred embodiment of this utility model, the lower surface of the mounting plate is also provided with a groove that communicates with the arc-shaped groove and the channel to accommodate the retraction groove of the hook. Attached Figure Description

[0025] Appendix Figure 1 This is a schematic diagram of the present invention from the main viewing angle.

[0026] Appendix Figure 2 This is a cross-sectional view of the present invention from a side perspective.

[0027] Appendix Figure 3This is a schematic diagram of the limiting component of this utility model from the main viewing angle.

[0028] Appendix Figure 4 Appendix to this utility model Figure 3 A partial structural diagram at point A.

[0029] Appendix Figure 5 Appendix to this utility model Figure 3 A schematic diagram of the partial structure at point B.

[0030] Figure description: Adsorption tube a, aging chamber 11, chassis 12;

[0031] Arc-shaped groove 111, hook 112, groove 113, retraction groove 114;

[0032] Vertical plate 1121, slanted plate 1122;

[0033] slope 1131;

[0034] Channel 301, sliding rod 302, lower protrusion 303, upper protrusion 304, positioning protrusion 305, horizontal plate 306, mounting vertical plate 307, rotation limit plate 308;

[0035] Movable groove 304a, movable column 304b, support spring 304c, arc-shaped protrusion 304d;

[0036] Side slot 308a, fixing rod 308b, limiting plate 308c, torsion spring 308d. Detailed Implementation

[0037] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component 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.

[0038] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] This embodiment provides a thermal desorption tube aging apparatus, as shown in the attached... Figure 1 ~Appendix Figure 5 As shown, it includes:

[0041] Aging chamber 11 is used to hold adsorption tube a to be aged;

[0042] A heating module is installed inside the aging chamber 11 and is used to heat the adsorption tube a;

[0043] A gas path system is connected to the adsorption tube a to purge the adsorption tube a.

[0044] Specifically, the pneumatic system is located inside the chassis 12. As prior art, referring to the document with patent number CN209707222U, the pneumatic system generally includes a multi-port valve, a solenoid valve, an inlet and outlet pipe, a pressure gauge, a pressure regulating valve, a controller, and a display screen, etc. The heating module generally includes a heating rod, a temperature sensor, etc. The controller is electrically connected to the solenoid valve, the heating rod, the temperature sensor, etc., and is equipped with wires and a power supply to connect to the aforementioned electrical components.

[0045] The heating module and gas path system function as follows: During aging, the controller, based on the temperature sensor signal and referring to the set temperature and time, controls the heating of the heating rod. Simultaneously, it controls the solenoid valve to open / close the gas path. The aging gas (nitrogen) enters through the inlet pipe and is delivered to each adsorption tube via a multi-port valve. It then carries the waste gas through the multi-port valve and outlet pipe, completing the purging of the adsorption tubes. During the purging process, the pressure gauge and pressure regulating valve monitor and control the flow rate of the aging gas, thereby controlling the aging process.

[0046] The aging chamber 11 is a split type, including a lower fixed chamber and an upper mounting cover;

[0047] The upper mounting cover includes a mounting plate, an arc-shaped groove 111 disposed on the lower surface of the mounting plate to embed the adsorption tube a, and at least two hooks 112 distributed on the outer periphery of the groove opening of the arc-shaped groove 111 for jointly supporting the same adsorption tube a.

[0048] The lower fixing box includes a fixing plate and a groove 113 provided on the upper surface of the fixing plate;

[0049] The diameter of the groove 113 is greater than the maximum distance between the two hooks 112, and when the adsorption tube a abuts against the arc groove 111, the distance by which the hooks 112 protrude from the lower surface of the mounting plate is less than or equal to the depth of the groove 113.

[0050] Specifically, the cross-sectional shape of the arc groove 111 is an arc, which ensures that more than 1 / 2 of the adsorption tube a can enter the arc groove 111 to ensure the basic fixation effect of the adsorption tube a; there are two hooks 112, which are symmetrically installed on the lower surface of the mounting plate. The material of the hooks 112 can be high-temperature resistant plastic or metal. The two hooks 112 are mainly used to ensure that the adsorption tube a is fixed on the upper mounting cover when the upper mounting cover is not installed with the lower fixing box. The advantage of this setting is that in the actual aging operation, one lower fixing box can correspond to multiple upper mounting covers, and a batch of adsorption tubes a is installed on one upper mounting cover for aging and cleaning. Whether before or after cleaning, it can play a role in quickly installing / removing the same batch of adsorption tubes, greatly reducing the preparation time before and after cleaning, simplifying the operation process and improving work efficiency.

[0051] It is worth noting that the limitation that "the diameter of the groove 113 is greater than the maximum distance between the two hooks 112, and when the adsorption tube a abuts against the arc groove 111, the distance by which the hook 112 protrudes from the lower surface of the mounting plate is less than or equal to the depth of the groove 113" means that when the upper mounting cover is connected to the lower fixing box, the hook 112 protruding from the lower surface of the mounting plate can be accommodated in the groove 113, thereby avoiding gaps at the connection between the upper mounting cover and the lower fixing box that would affect the aging effect, and also avoiding excessive compression of the adsorption tube a by the hook 112 that could lead to breakage or other problems.

[0052] It is understandable that the connection between the lower fixed box and the upper mounting cover can adopt any existing detachable connection method, as long as there is no obvious gap after the two are connected, so this article will not elaborate further.

[0053] In a preferred embodiment, the hook 112 includes a vertical plate 1121 connected to the mounting plate, and an inclined plate 1122 disposed at the lower end of the vertical plate 1121 and abutting against the portion of the adsorption tube a protruding from the lower surface of the mounting plate; the groove wall of the groove 113 is formed with an inclined surface 1131 matching the inclined plate 1122.

[0054] Specifically, the inclined plate 1122 is preferably tangent to the outer wall of the adsorption tube a to ensure that the force exerted by the inclined plate 1122 on the adsorption tube a is perpendicular to the surface of the adsorption tube a, thereby reducing wear on the adsorption tube a; the inclined surface 1131 is preferably parallel to the inclined plate 1122 to ensure that the force exerted on the inclined plate 1122 is uniform and stable when the inclined plate 1122 is squeezed, thereby further reducing the risk of possible wear on the adsorption tube a.

[0055] In a preferred embodiment, the hook 112 is connected to the mounting plate by a limiting member; the limiting member includes a channel 301 that passes through the mounting plate and corresponds one-to-one with the hook 112, a sliding rod 302 that is slidably connected in the channel 301 and connected to the hook 112, a lower protrusion 303 and an upper protrusion 304 disposed on the inner wall of the channel 301, and a positioning protrusion 305 disposed on the sliding rod 302;

[0056] When the positioning protrusion 305 is engaged with the lower protrusion 303, the hook 112 supports the adsorption tube a and there is a gap between the adsorption tube a and the bottom surface of the arc-shaped groove 111; when the positioning protrusion 305 is engaged with the upper protrusion 304, the hook 112 supports the adsorption tube a and the adsorption tube a abuts against the bottom surface of the arc-shaped groove 111.

[0057] Specifically, the limiting component is mainly designed to reduce the difficulty of inserting the adsorption tube a into the space between the arc-shaped groove 111 and the hook 112 during the preparation phase. To elaborate, since the two ends of the adsorption tube a are enlarged and larger than the middle section, if the fixed space between the hook 112 and the arc-shaped groove 111 is exactly the same size as the tube a, then the tube a must be squeezed into the fixed space between the two hooks 112. This is not only difficult but also causes significant wear on the adsorption tube. If the fixed space is large enough for the enlarged parts to pass through, although the adsorption tube a can be easily inserted, after the lower fixed box and the upper mounting cover are connected, the adsorption tube a is suspended above the lower fixed box, reducing the heating effect and prolonging the heating time. The "telescopic" hook, however, allows for easy insertion and a tight fit during heating. The specific principle is as follows: During the preparation stage, the positioning protrusion 305 is engaged with the lower protrusion 303 (the positioning protrusion 305 is at the upper end of the lower protrusion 303 and at the lower end of the upper protrusion 304). At this time, the space between the hook 112 and the arc groove 111 is at its maximum, and the adsorption tube a can be easily inserted. After the lower fixed box and the upper mounting cover are connected, the inclined surface 1131 presses the inclined plate 1122, causing the sliding rod 302 to be lifted. The positioning protrusion 305 passes over the upper protrusion 304 and is engaged at the upper end of the upper protrusion 304. At this time, the space between the hook 112 and the arc groove 111 is reduced, and the fastening effect on the adsorption tube a is enhanced. The adsorption tube a can fit as close as possible to the groove 113 on the fixed plate to ensure the heating effect. The number and position of the lower protrusion 303, upper protrusion 304 and positioning protrusion 305 are all in one-to-one correspondence. Taking the positioning protrusion 305 as an example, in this embodiment, the preferred number is two, which are symmetrically distributed on both sides of the sliding rod 302.

[0058] Furthermore, the maximum distance by which the upper protrusion 304 protrudes beyond the inner wall of the channel 301 is greater than the maximum distance by which the lower protrusion 303 protrudes beyond the inner wall of the channel 301. This arrangement is to prevent the positioning protrusion 305 from easily passing over the upper protrusion 304 when it comes into contact with the lower end of the upper protrusion 304 due to gravity when the upper mounting cover is moved independently by pulling the sliding rod 302, thus affecting the installation of the adsorption tube a.

[0059] In a preferred embodiment, the upper protrusion 304 includes a movable groove 304a disposed on the inner wall of the channel 301, a movable column 304b slidably connected within the movable groove 304a, a support spring 304c disposed on the bottom surface of the movable groove 304a and connected to the movable column 304b, and an arc-shaped protrusion 304d disposed on the end of the movable column 304b away from the support spring 304c. This configuration ensures both the engagement effect of the upper protrusion 304 and reduces wear between it and the positioning protrusion 305.

[0060] In a preferred embodiment, the lower surface of the mounting plate is further provided with a retraction groove 114 that communicates with both the arc-shaped groove 111 and the channel 301 to accommodate the hook 112. The retraction groove 114 is mainly provided to facilitate the accommodation of the upper end of the hook 112, i.e., the connection between the vertical plate 1121 and the inclined plate 1122, so as to avoid affecting the overall rising of the hook 112.

[0061] It is understandable that although most of the aforementioned holes and slots are located inside the upper mounting cover and lower fixing box, heat loss may still occur. However, those skilled in the art can overcome this problem by using conventional methods such as finely setting the size of the holes and slots, or by using materials with heat insulation and / or sealing functions on the holes and slots. Therefore, the aging instrument provided in this embodiment still has the advantage of strong practicality.

[0062] As a preferred embodiment, the limiting member further includes a horizontal plate 306 disposed on the end of the sliding rod 302 protruding from the upper surface of the mounting plate and parallel to the mounting plate, a mounting vertical plate 307 disposed on the upper surface of the mounting plate and located at the side end of the horizontal plate 306, and a rotation limiting plate 308 hinged to the mounting vertical plate 307.

[0063] When the hook portion 112 supports the adsorption tube a and there is a gap between the adsorption tube a and the bottom surface of the arc-shaped groove 111, the rotation limiting plate 308 is parallel to the horizontal plate 306 and located at the upper end of the horizontal plate 306; when the hook portion 112 supports the adsorption tube a and the adsorption tube abuts against the bottom surface of the arc-shaped groove 111, the rotation limiting plate 308 is perpendicular to or inclined to the horizontal plate 306, and the upper end of the horizontal plate 306 is higher than the lower end of the rotation limiting plate 308.

[0064] Specifically, the horizontal plate 306 is used to connect all the sliding rods 302 at the same end of the adsorption tube a to ensure the synchronization between the sliding rods 302, and further ensure the synchronous installation of all adsorption tubes a. At the same time, the horizontal plate 306 can also act as a handle to help lift and transfer the upper mounting cover, and can also act as a support to keep the adsorption tube a facing upward by inverting it, so as to avoid squeezing the adsorption tube a during the preparation stage.

[0065] Specifically, the function of the rotating limiting plate 308 is mainly to further reduce the possibility that the positioning protrusion 305 may accidentally cross the upper protrusion 304 when the upper cover is placed alone. That is, when the rotating limiting plate 308 is kept parallel to the horizontal plate 306, the rotating limiting plate 308 restricts the upward movement distance of the horizontal plate 306. This distance is less than the distance between the lower protrusion 303 and the upper protrusion 304, so that the positioning protrusion 305 cannot cross the upper protrusion 304. When it is necessary for the positioning protrusion 305 to be engaged by the upper protrusion 304, simply rotate the rotating limiting plate 308 to a position that does not affect the upward movement of the horizontal plate 206. The operation is simple and convenient.

[0066] Further, the rotating limiting plate 308 includes a side slot 308a disposed on the mounting vertical plate 307, a fixing rod 308b disposed on the side slot 308a, a limiting plate body 308c rotatably disposed on the fixing rod 308b, and an adjusting member for adjusting the rotation angle of the limiting plate body 308c. Preferably, the adjusting member includes a torsion spring 308d sleeved on the fixing rod 308b, one end connected to the limiting plate body 308c, and the other end connected to the side slot 308a; the torsion spring 308d is used to keep the limiting plate body 308c parallel to the horizontal plate 306. In another preferred embodiment, the adjusting member includes a plurality of insertion holes disposed on the slot wall of the side slot 308a, a connecting hole disposed on the limiting plate body 308c, and a positioning rod passing through the connecting hole and connected to the insertion hole.

[0067] It is understandable that the structure of the rotating limit plate 308, whether using a torsion spring or a positioning rod as the core component, can be designed by those skilled in the art with reference to existing technologies. Therefore, the working principle of the rotating limit plate 308 will not be elaborated further.

[0068] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A thermal desorption tube aging apparatus, characterized by: include: Aging chamber (11) is used to hold adsorption tubes (a) to be aged. A heating module is installed inside the aging chamber (11) for heating the adsorption tube (a); A gas path system is connected to the adsorption tube (a) to purge the adsorption tube (a); The aging chamber (11) is a split type, including a lower fixed chamber and an upper mounting cover; The upper mounting cover includes a mounting plate, an arc-shaped groove (111) disposed on the lower surface of the mounting plate to embed the adsorption tube (a), and at least two hooks (112) distributed on the outer periphery of the groove opening of the arc-shaped groove (111) for jointly supporting the same adsorption tube (a). The lower fixing box includes a fixing plate and a groove (113) on the upper surface of the fixing plate. The diameter of the groove (113) is greater than the maximum distance between the two hooks (112), and when the adsorption tube (a) abuts against the arc groove (111), the distance by which the hooks (112) protrude from the lower surface of the mounting plate is less than or equal to the depth of the groove (113).

2. A thermal desorption tube aging apparatus according to claim 1, wherein: The hook (112) includes a vertical plate (1121) connected to the mounting plate, and an inclined plate (1122) disposed at the lower end of the vertical plate (1121) and abutting against the portion of the adsorption tube (a) protruding from the lower surface of the mounting plate; the groove wall of the groove (113) is formed with an inclined surface (1131) matching the inclined plate (1122).

3. A thermal desorption tube aging apparatus according to either of claims 1 or 2, characterized in that: The hook (112) is connected to the mounting plate by a limiting member; the limiting member includes a channel (301) that passes through the mounting plate and corresponds one-to-one with the hook (112), a sliding rod (302) that is slidably connected in the channel (301) and connected to the hook (112), a lower protrusion (303) and an upper protrusion (304) provided on the inner wall of the channel (301), and a positioning protrusion (305) provided on the sliding rod (302); When the positioning protrusion (305) and the lower protrusion (303) are engaged, the hook (112) supports the adsorption tube (a) and there is a gap between the adsorption tube (a) and the bottom surface of the arc groove (111); when the positioning protrusion (305) and the upper protrusion (304) are engaged, the hook (112) supports the adsorption tube (a) and the adsorption tube (a) abuts against the bottom surface of the arc groove (111).

4. A thermal desorption tube aging apparatus as defined in claim 3, wherein: The maximum distance by which the upper protrusion (304) protrudes from the inner wall of the channel (301) is greater than the maximum distance by which the lower protrusion (303) protrudes from the inner wall of the channel (301).

5. The thermal desorption tube aging apparatus of claim 3, wherein: The upper protrusion (304) includes a movable groove (304a) disposed on the inner wall of the channel (301), a movable column (304b) slidably connected in the movable groove (304a), a support spring (304c) disposed on the bottom surface of the movable groove (304a) and connected to the movable column (304b), and an arc-shaped protrusion (304d) disposed on the end of the movable column (304b) away from the support spring (304c).

6. A thermal desorption tube aging apparatus as defined in claim 3, wherein: The limiting member also includes a horizontal plate (306) disposed on the end of the sliding rod (302) protruding from the upper surface of the mounting plate and parallel to the mounting plate, a mounting vertical plate (307) disposed on the upper surface of the mounting plate and located at the side end of the horizontal plate (306), and a rotation limiting plate (308) hinged to the mounting vertical plate (307). When the hook (112) supports the adsorption tube (a) and there is a gap between the adsorption tube (a) and the bottom surface of the arc groove (111), the rotation limiting plate (308) is parallel to the horizontal plate (306) and located at the upper end of the horizontal plate (306); when the hook (112) supports the adsorption tube (a) and the adsorption tube (a) abuts against the bottom surface of the arc groove (111), the rotation limiting plate (308) is perpendicular to or inclined to the horizontal plate (306), and the upper end of the horizontal plate (306) is higher than the lower end of the rotation limiting plate (308).

7. A thermal desorption tube aging apparatus as defined in claim 6, wherein: The rotating limiting plate (308) includes a side slot (308a) provided on the mounting vertical plate (307), a fixing rod (308b) provided on the side slot (308a), a limiting plate body (308c) rotatably provided on the fixing rod (308b), and an adjusting member for adjusting the rotation angle of the limiting plate body (308c).

8. A thermal desorption tube aging apparatus according to claim 7, wherein: The adjusting component includes a torsion spring (308d) sleeved on the fixed rod (308b), with one end connected to the limiting plate (308c) and the other end connected to the side slot (308a); the torsion spring (308d) is used to keep the limiting plate (308c) parallel to the horizontal plate (306).

9. The thermal desorption tube aging apparatus of claim 7, wherein: The adjusting component includes a plurality of insertion holes disposed on the groove wall of the side slot (308a), a connecting hole disposed on the limiting plate (308c), and a positioning rod passing through the connecting hole and connected to the insertion hole.

10. The thermal desorption tube aging apparatus of claim 3, wherein: The lower surface of the mounting plate is also provided with a retraction groove (114) that is connected to the arc groove (111) and the channel (301) to accommodate the hook (112).

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