Textile fabric aerosol sample collecting and guiding device

Abstract

The utility model discloses a textile fabric aerosol sample collecting and guiding device, which relates to the technical field of aerosol sample collection and comprises a holding sleeve with a hollow structure, a ceramic gas-guide tube, a gas-guide cavity I, a gas-guide cavity II, a gas-guide cavity III, a gas-guide cavity IV, a gas-guide cavity IV, a gas-guide cavity IV and a gas-guide cavity V. The upper end of the holding sleeve is bent to form a bent extension part. The bottom end of the ceramic gas-guide tube extends out of an opening in the bottom end of the gas-guide chamber I to form an extending end, and an electric heating head is embedded in the bottom wall of the ceramic gas-guide tube. During collection, a collection worker holds the bent extension part by hand, the extension end extending out of the holding sleeve is in contact with the surface wall of the textile fabric in a manner of being perpendicular to the textile fabric, the contact surface of the surface wall of the electric heating head and the surface wall of the textile fabric is maximized, and aerosol can be generated after high temperature generated by the electric heating head is in contact with the textile fabric; aerosol flows into an external pipe from the gas guide chamber I and the gas guide chamber II, so that the collection amount of the aerosol is maximized, and the aerosol finally enters a mass spectrometer for detection.

Description

Technical Field

[0001] The utility model relates to the technical field of aerosol sample collection, in particular to a textile fabric aerosol sample collection and guiding device. Background Art

[0002] At present, the identification of textile fiber components from traditional combustion method, manual splitting method, chemical dissolution method, electron microscopy method all have obvious drawbacks. Although the spectral method developed in recent years has achieved rapid non-destructive detection, it only relies on the optical properties of the sample for indirect judgment and is easily interfered by external factors such as color, state, impurities, and process; differential scanning calorimetry uses the change of the thermodynamic parameter of the melting point of the substance to analyze the composition of the sample, and it is difficult to distinguish components with similar melting points. Using an in-situ ionization high-resolution mass spectrometer to directly analyze the textile fiber component aerosol, the high-resolution mass spectrum deeply reveals the nature of different fiber components of textiles, keenly monitors the inherent differences of different fiber components, is not easily interfered by external factors, can be green, direct, simple, fast, real-time, and reliable. It is a new method for analyzing textile fiber components, which is expected to become a new mechanism for revealing textile fiber components and has great application prospects.

[0003] Rapid evaporative ionization mass spectrometry (REIMS) combines an innovative handheld sampling device that conforms to the characteristics of textile properties. It releases aerosols by contact heating textile samples, which are directly inhaled through a catheter into a rapid evaporation ion source for in-situ ionization and then enter a high-resolution mass spectrometer for detection, with the help of statistical software for real-time identification. It only takes a few seconds from sample cutting to data generation, eliminating many restrictions related to sample preparation, and providing analysts with accurate molecular profiles with high characteristics of the sample, which are used as "fingerprints" to identify key attributes, reflecting the true attributes and phenotypic characteristics of the sample. It is a direct, simple, green and efficient analytical technology.

[0004] At present, the following problems exist in the aerosol collection process of textile fabrics: the collection is easily affected by the technique, the contact area is unstable during contact, and the signal response intensity is unstable. It is necessary to cut a certain length on the surface of the sample to ensure that enough aerosol samples are generated to achieve the appropriate response intensity. The force and time control in this cutting process are easily affected by the operator. Utility Model Content

[0005] The purpose of the utility model is to provide a textile fabric aerosol sample collection and guiding device to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a textile fabric aerosol sample collection and delivery device, comprising:

[0007] A holding sleeve with a hollow structure, wherein the upper end of the holding sleeve is bent to form a bent extension portion, the end of the bent extension portion is narrowed to form a threaded joint, the threaded joint is threadedly connected to an external pipe, and the other end of the air guide pipe is threadedly connected to the air inlet port of the mass spectrometer.

[0008] The ceramic air guide tube is fixed inside the holding sleeve, an air guide chamber 1 is provided between the ceramic air guide tube and the holding sleeve, an air guide chamber 2 is axially provided on the ceramic air guide tube, the bottom end of the ceramic air guide tube extends out of the bottom opening of the air guide chamber 1 to form an extended end, and an electric heating head is embedded in the bottom wall of the ceramic air guide tube.

[0009] In a further embodiment, a conductive sheet is embedded in the wall of the ceramic air duct and is connected in series with the positive and negative poles of the electric heating head. The upper end of the conductive sheet is an I-shaped structure. The outer wall of the I-shaped structure is sleeved with a docking conductive tube. The docking conductive tube is connected to a power cord that passes through the outer wall of the holding sleeve.

[0010] In a further embodiment, a hollow sleeve is radially fixed to the outer wall of the top end of the ceramic air guide tube, and the other end of the hollow sleeve passes through the radial side wall of the holding sleeve. After passing through the radial side wall of the ceramic air guide tube, the power cord passes through the hollow sleeve laterally.

[0011] In a further embodiment, it also includes a supporting guide member, which includes an inverted L-shaped support rod fixed to the radial side wall of the holding sleeve and a support column slidably connected to the inverted L-shaped support rod, an inverted T-shaped lifting groove is recessed at the upper end of the support column, and a slider is fixed to one end of the inverted L-shaped support inserted into the inverted T-shaped lifting groove.

[0012] In a further embodiment, a pressure ring with an annular structure is fixed to the bottom end of the outer wall of the support column.

[0013] In a further embodiment, a spring is connected to the bottom wall of the slider, and the other end of the spring is fixedly connected to the inner bottom wall of the inverted T-shaped lifting slot.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model is a textile fabric aerosol sample collection and guiding device. During collection, the collector holds the bent extension part and contacts the surface wall of the textile fabric with the extended end of the holding sleeve in a manner perpendicular to the textile fabric. The contact surface between the surface wall of the electric heating head and the surface wall of the textile fabric is maximized to ensure the stability of the contact area, thereby making the final mass spectrometer detection signal response intensity stable. The high temperature generated by the electric heating head will contact the textile fabric to generate aerosol, and the aerosol will flow into the external pipe through the gas guide chamber one and the gas guide chamber two to ensure the maximum amount of aerosol collection, and finally enter the mass spectrometer for detection, thereby improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2 A partial cross-sectional view of an embodiment of the utility model;

[0018] Figure 3 For the utility model embodiment Figure 2 A magnified view of the structure at center;

[0019] Figure 4 For the utility model embodiment Figure 2 A magnified view of the structure at B in the middle;

[0020] Figure 5 A schematic diagram of a further improved structure of an embodiment of the utility model;

[0021] Figure 6 This is a schematic diagram of the support guide structure of an embodiment of the utility model.

[0022] In the figure: 1. Holding sleeve; 2. Ceramic air guide tube; 21. Air guide chamber 2; 22. Conductive sheet; 23. Docking conductive tube; 3. Electric heating head; 4. Hollow sleeve; 5. Power cord; 6. External pipe; 7. Inverted L-shaped support rod; 8. Support column; 9. Pressing ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment, this embodiment provides a textile fabric aerosol sample collection and delivery device, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, including:

[0025] The holding sleeve 1 has a hollow structure, and the upper end of the holding sleeve 1 is bent to form a bent extension portion, and the end of the bent extension portion is narrowed to form a threaded joint, and the threaded joint is threadedly connected with an external tube 6. The bottom opening of the holding sleeve 1 serves as an aerosol inlet. The mass spectrometer has a negative pressure suction function, so the aerosol enters the interface of the mass spectrometer through the holding sleeve 1 and the external tube 6 to realize the detection operation.

[0026] The ceramic air guide tube 2 is fixed inside the holding sleeve 1. An air guide chamber 1 is provided between the ceramic air guide tube 2 and the holding sleeve 1. An air guide chamber 2 21 is axially provided on the ceramic air guide tube 2. The bottom end of the ceramic air guide tube 2 extends out of the bottom end opening of the air guide chamber 1 to form an extended end. The bottom wall of the ceramic air guide tube 2 is embedded with an electric heating head 3. The wall of the ceramic air guide tube 2 is embedded with a conductive sheet 22 connected in series with the positive and negative electrodes of the electric heating head 3. The upper end of the conductive sheet 22 is an I-shaped structure. The outer wall of the I-shaped structure is sleeved with a docking conductive tube 23. The docking conductive tube 23 is connected to a power line 5 passing through the outer wall of the holding sleeve 1. The conductive sheet 22 and the docking conductive tube 23 are both made of copper and have good electrical conductivity. The conductive sheet 22 is used as a conductive medium to connect the electric heating head 3 to the power line 5, which has the characteristic of high temperature resistance. A plug is set at the end of the power line 5 to facilitate an external power supply to power the electric heating head 3.

[0027] The air guide chamber 21 and the air guide chamber 1 serve as a collection channel after the aerosol is generated, so as to prevent the aerosol from diffusing in the air after it is generated, resulting in a very limited amount of aerosol finally collected in the mass spectrometer, which affects the detection accuracy of the mass spectrometer. In addition, a hollow sleeve 4 is radially fixed on the outer wall of the top of the ceramic air guide tube 2, and the other end of the hollow sleeve 4 passes through the radial side wall of the holding sleeve 1. After the power cord 5 passes through the radial side wall of the ceramic air guide tube 2, it passes through the hollow sleeve 4 laterally. By adding the hollow sleeve 4, firstly, the hollow sleeve 4 is used as a mounting part to fix the ceramic air guide tube 2 in the holding sleeve 1, and secondly, it is an external protective component for the power cord 5 before passing through the holding sleeve 1, so as to prevent the high-temperature aerosol passing through the air guide chamber 1 from roasting the power cord 5, resulting in excessive temperature of the power cord 5 and causing line failure.

[0028] like Figure 4As shown, the electric heating head 3 is a nickel-chromium alloy heating wire, which has good high-temperature mechanical properties, cold plastic deformation and weldability. In addition, the high-temperature strength of nickel-chromium alloy is higher than that of iron-chromium-aluminum alloy, and its plasticity is still very good after long-term use, and there will be no brittle fracture caused by long-term use. The working principle of the nickel-chromium alloy heating wire is based on resistance heating. When the current passes through the electric heating head 3, the resistance of the heating wire will generate heat, thereby increasing the temperature of the heating wire, and the temperature quickly rises to 400°C. When the electric heating head 3 contacts the textile fabric, an aerosol will be generated instantly. Here, the length of the ceramic air duct 2 extending out of the bottom end of the holding sleeve 1 is 1-2cm, mainly to avoid the outer diameter of the holding sleeve 1 being larger than the outer diameter of the ceramic air duct 2, blocking the end of the ceramic air duct 2 from sight, causing the staff to not be able to see whether the electric heating head 3 is in contact with the textile fabric.

[0029] During collection, the collector holds the bent extension part and contacts the surface wall of the textile fabric with the extended end of the holding sleeve 1 in a manner perpendicular to the textile fabric. The contact area between the surface wall of the electric heating head 3 and the surface wall of the textile fabric is maximized to ensure the stability of the contact area, thereby making the final mass spectrometer detection signal response intensity stable. The high temperature generated by the electric heating head 3 will contact the textile fabric to produce aerosol. Since the inner diameter of the holding sleeve 1 is large and the coverage area on the outside of the ceramic air guide tube 2 is large, the generated aerosol will flow into the external pipe 6 through the air guide chamber 1 and the air guide chamber 2 21, ensuring that the aerosol collection amount is maximized and finally enters the mass spectrometer for detection, thereby improving the detection accuracy.

[0030] In the prior art, the conduit connected to the mass spectrometer is made of resin material that is not resistant to high temperatures. The part of the conduit close to the electric heating head 3 is easily affected by the high temperature of the electric heating head 3, resulting in smoke inhalation and interference with sample detection. For this reason, the ceramic air guide tube 2 is made of ceramic material, which has high temperature resistance, thereby avoiding the high temperature generated by the electric heating head 3 causing the tube body to fuse and produce smoke, affecting the final detection result. Of course, the holding sleeve 1 can also be made of ceramic material, which also has high temperature resistance.

[0031] In this embodiment, in order to ensure that the contact area between the heated side wall of the electric heating head 3 and the textile fabric is maximized, it is necessary to make the heated side wall of the electric heating head 3 in parallel contact with the surface wall of the textile fabric. However, by manually holding the bent extension part, it depends on the random control method of the hand, and it is impossible to accurately and correctly make the electric heating head 3 in parallel contact with the textile fabric. For this purpose, it also includes a support guide, which includes an inverted L-shaped support rod 7 fixed to the radial side wall of the holding sleeve 1 and a support column 8 slidably sleeved with the inverted L-shaped support rod 7. The upper end of the support column 8 is recessed with an inverted T-shaped lifting groove, and a slider is fixed to one end of the inverted L-shaped support inserted into the inverted T-shaped lifting groove, such as Figure 5 and Figure 6As shown, place the support column 8 vertically on the detection table covered with textile fabrics, press down the inverted L-shaped support rod 7, slide the slider down along the inverted T-shaped lifting groove, and move the electric heating head 3 vertically downward until the electric heating head 3 is stably attached to the surface wall of the textile fabric, the contact area is stable and maximized, and the amount of smoke generated meets the detection requirements.

[0032] Furthermore, a ring-shaped pressing ring 9 is fixed at the bottom end of the outer wall of the support column 8. The additional pressing ring 9 provides a stable supporting foundation for the support column 8, and the inner space of the pressing ring 9 does not affect the descending height of the ceramic air guide tube 2, so that the electric heating head 3 contacts the textile fabric.

[0033] At the same time, a spring can be connected to the bottom wall of the slider, and the other end of the spring is fixedly connected to the bottom wall of the inverted T-shaped lifting groove. By adding a spring, rebound potential energy can be provided for the slider to slide upward. After the aerosol is generated, the electric heating head 3 is lifted upward and separated from the textile fabric.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A textile fabric aerosol sample collection and delivery device, characterized in that: include: A holding sleeve (1) with a hollow structure, wherein the upper end of the holding sleeve (1) is bent to form a bent extension portion, the end of the bent extension portion is narrowed to form a threaded joint, and the threaded joint is threadedly connected to an external pipe (6); A ceramic air guide tube (2) is fixed inside a holding sleeve (1); an air guide chamber 1 is provided between the ceramic air guide tube (2) and the holding sleeve (1); an air guide chamber 2 (21) is axially provided on the ceramic air guide tube (2); the bottom end of the ceramic air guide tube (2) extends out of the bottom end opening of the air guide chamber 1 to form an extended end; and an electric heating head (3) is embedded in the bottom wall of the ceramic air guide tube (2).

2. The textile fabric aerosol sample collection and delivery device according to claim 1, characterized in that: A conductive sheet (22) connected in series with the positive and negative electrodes of the electric heating head (3) is embedded in the wall of the ceramic air guide tube (2); the upper end of the conductive sheet (22) is an I-shaped structure; the outer wall of the I-shaped structure is sleeved with a docking conductive tube (23); the docking conductive tube (23) is connected to a power line (5) passing through the outer wall of the holding sleeve (1).

3. The textile fabric aerosol sample collection and delivery device according to claim 2, characterized in that: A hollow sleeve (4) is radially fixed to the outer wall of the top end of the ceramic air guide tube (2); the other end of the hollow sleeve (4) passes through the radial side wall of the holding sleeve (1); and the power cord (5) passes through the radial side wall of the ceramic air guide tube (2) and then passes through the hollow sleeve (4) laterally.

4. The textile fabric aerosol sample collection and delivery device according to claim 1, characterized in that: It also includes a support guide, which includes an inverted L-shaped support rod (7) fixed to the radial side wall of the holding sleeve (1) and a support column (8) slidably sleeved with the inverted L-shaped support rod (7), an inverted T-shaped lifting groove recessed at the upper end of the support column (8), and a slider fixed to one end of the inverted L-shaped support inserted into the inverted T-shaped lifting groove.

5. The textile fabric aerosol sample collection and delivery device according to claim 4, characterized in that: A pressing ring (9) with an annular structure is fixed to the bottom end of the outer wall of the support column (8).

6. The textile fabric aerosol sample collection and delivery device according to claim 5, characterized in that: The bottom wall of the sliding block is connected with a spring, and the other end of the spring is fixedly connected with the inner bottom wall of the inverted T-shaped lifting groove.

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