Pyrolysis sample introduction rod suitable for powdery tobacco sample

Abstract

The pyrolysis sample injection rod comprises an inner rod and an outer rod which are sleeved in an internal and external sliding mode, the outer rod is in a cylindrical shape with an upper opening and a lower opening, the portion, upwards extending out of the top end of the outer rod, of the inner rod is an upper extending section, the upper end of the inner rod is an external thread end, and a limiting nut is sleeved with the upper end of the inner rod in a threaded mode. The upper extending section of the inner rod is sleeved with a spring, the upper end and the lower end of the spring are connected with the limiting nut and the top end of the outer rod respectively, a circle of annular sample containing groove is formed in the periphery of the lower end of the inner rod, and in the natural state, the limiting nut is elastically supported through the spring, so that the sample containing groove of the inner rod retracts into an inner hole channel of the outer rod. The periphery of the sample containing groove of the inner rod is sealed through the side wall of the inner hole channel of the outer rod. Compared with the prior art, the utility model has the following advantages: the powdery tobacco sample can be quickly filled, cracked and sampled, and the powdery tobacco sample can be quickly cracked by being matched with a glass reactor in the cracking furnace.

Description

Technical Field

[0001] The utility model relates to the technical field of pyrolysis injection devices for tobacco samples, and particularly relates to a pyrolysis injection rod suitable for powdery tobacco samples. Background Art

[0002] Tobacco pyrolysis is often regarded as a means close to the cigarette combustion process and is often used as an experimental method for studying flue gas components and tobacco products. Generally, methods such as thermogravimetric analysis, thermogravimetry-infrared coupling analysis, and pyrolysis-gas chromatography / mass spectrometry coupling analysis are used to study the pyrolysis process of tobacco products at different temperature ranges, so as to master the formation conditions and laws of tobacco pyrolysis products. However, these common means have the following defects: either they are time-consuming offline, or they will introduce other fragment impurities to interfere, making the obtained pyrolysis products difficult to analyze. Therefore, new analysis methods are needed for supplementation.

[0003] Previously, we built a set of online monitoring device for rapid pyrolysis products of tobacco (patent number: ZL202323253081.X), which can quickly heat up to the required temperature range and conduct real-time and online observation of tobacco pyrolysis products, obtaining good results. Considering that for tobacco samples in different forms, corresponding injection methods need to be adopted. For powdery tobacco samples, the existing injection method is generally: install a sample container with an open top at the bottom of the injection rod, place the powdery tobacco sample in the sample container, and lower the sample container containing the tobacco sample into the glass reactor in the pyrolysis furnace through the injection rod; during the subsequent pyrolysis process, since the powdery tobacco sample has been placed in the sample container, the tobacco sample is not evenly heated, resulting in insufficient pyrolysis of the tobacco sample and thus affecting the subsequent detection results. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a pyrolysis injection rod suitable for powdery tobacco samples, so as to realize rapid loading and pyrolysis sampling of powdery tobacco-like samples, and cooperate with the glass reactor in the pyrolysis furnace to study the rapid pyrolysis of powdery tobacco samples.

[0005] The utility model is realized through the following technical solutions:

[0006] A pyrolysis sampling rod applicable to powdery tobacco samples, comprising an inner rod and an outer rod which are sleeved and slidable inside and outside. The outer rod is in the shape of a cylinder with openings at both the upper and lower ends. The part of the inner rod extending upward above the top end of the outer rod is the upper extension section. The upper end of the inner rod is an external thread end and is threadedly sleeved with a limit nut. A spring is sleeved on the upper extension section of the inner rod, and the upper and lower ends of the spring are respectively connected to the limit nut and the top end of the outer rod. An annular sample accommodation groove is formed around the periphery of the lower end of the inner rod. In the natural state, the limit nut is elastically supported by the spring, so that the sample accommodation groove of the inner rod retracts into the inner hole of the outer rod, and the periphery of the sample accommodation groove of the inner rod is closed by the side wall of the inner hole of the outer rod.

[0007] As a preferred scheme of the above pyrolysis sampling rod, a locking sleeve is slidably sleeved on the outer rod. A lateral locking screw hole is formed on the locking sleeve. By screwing a lateral locking screw into the lateral locking screw hole and pressing against the outer side wall of the outer rod, the locking of the relative position between the locking sleeve and the outer rod is realized.

[0008] As a preferred scheme of the above pyrolysis sampling rod, a rotating cover is sleeved loosely on the outer rod. The rotating cover is located below the locking sleeve. An installation ring is provided at the top of the avoidance hole of the top cover of the glass reactor in the pyrolysis furnace. An external thread is provided on the installation ring. A sealing ring is provided between the top of the installation ring of the top cover and the rotating cover. The inner screw hole of the rotating cover is threadedly connected to the external thread of the installation ring. By tightening the rotating cover to squeeze the sealing ring, the sealing of the gap between the avoidance hole of the top cover and the outer rod is realized.

[0009] As a preferred scheme of the above pyrolysis sampling rod, the sample accommodation groove is an arc-shaped groove with an arc-shaped cross section.

[0010] The utility model has the following advantages compared with the prior art:

[0011] The pyrolysis sampling rod applicable to powdery tobacco samples provided by the utility model is provided with an inner rod and an outer rod which are sleeved inside and outside. An annular sample accommodation groove for placing powdery tobacco samples is formed around the periphery of the lower end of the inner rod, and the periphery of the sample accommodation groove of the inner rod is closed by the side wall of the inner hole of the outer rod to prevent the powdery tobacco samples from spilling; and by pressing the top end of the inner rod, the sample accommodation groove at the bottom of the inner rod can be extended, realizing the rapid loading of the sample; during use, the sampling rod is inserted into the glass reactor, and by pressing the top end of the inner rod, the powdery tobacco samples can be released, making the pyrolysis of the powdery tobacco samples more uniform and sufficient, and the operation is convenient and fast. In addition, by using the locking sleeve, the depth of the sampling rod inserted into the glass reactor can be adjusted and locked, which can meet the pyrolysis sampling requirements in different situations and has good versatility. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the utility model.

[0013] Reference numerals in the figure: 1 inner rod; 2 outer rod; 3 limit nut; 4 spring; 5 sample receiving groove; 6 locking sleeve; 7 lateral locking screw; 8 screw cap; 9 external thread end. Specific implementation mode

[0014] The embodiments of the present invention will be described in detail below. The following embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments.

[0015] See Figure 1 , this embodiment discloses a pyrolysis sampling rod applicable to powdery tobacco samples, which includes an inner rod 1 and an outer rod 2 that are sleeved with each other in a sliding manner. The outer rod 2 is a cylindrical shape with openings at both the upper and lower ends. The part of the inner rod 1 that extends upward above the top end of the outer rod 2 is the upper extension section. The upper end of the inner rod 1 is an external thread end 9 and is threadedly sleeved with a limit nut 3. A spring 4 is sleeved on the upper extension section of the inner rod 1. The spring 4 is a compression spring. The upper and lower ends of the spring 4 are respectively connected to the limit nut 3 and the top end of the outer rod 2. A circular sample receiving groove 5 is formed around the lower end of the inner rod 1. The shape of the sample receiving groove 5 is not limited. In this embodiment, the sample receiving groove 5 is an arc-shaped groove with an arc-shaped cross-section. In the natural state, the limit nut 3 is elastically supported by the spring 4, so that the sample receiving groove 5 of the inner rod 1 retracts into the inner hole of the outer rod 2, and the periphery of the sample receiving groove 5 of the inner rod 1 is closed by the side wall of the inner hole of the outer rod 2.

[0016] A locking sleeve 6 is slidably sleeved on the outer rod 2. A lateral locking screw hole is formed in the locking sleeve 6. By screwing a lateral locking screw 7 into the lateral locking screw hole and abutting against the outer side wall of the outer rod 2, the relative position of the locking sleeve 6 and the outer rod 2 is locked. Loosen the lateral locking screw 7, and the position of the locking sleeve 6 on the outer rod 2 can be adjusted, so as to realize the adjustment of the depth of the sampling rod inserted into the glass reactor.

[0017] A screw cap 8 is sleeved on the outer rod 2 in a loose manner. The screw cap 8 is located below the locking sleeve 6. An installation ring is provided at the top of the avoidance hole of the top cover of the glass reactor in the cracking furnace. External threads are provided on the installation ring. A sealing ring is provided between the top of the installation ring of the top cover and the screw cap 8. The inner screw hole of the screw cap 8 is threadedly connected to the external threads of the installation ring. By tightening the screw cap 8 to squeeze the sealing ring, the sealing of the gap between the avoidance hole of the top cover and the outer rod 2 is realized.

[0018] In use, first hold the outer rod 2 tightly with the hand and press down the top end of the inner rod 1. The spring 4 is compressed, and the bottom of the inner rod 1 extends downward from the inner hole of the outer rod 2 until the sample receiving groove 5 at the bottom of the inner rod 1 is completely exposed. At this time, the powdered tobacco sample can be loaded into the sample receiving groove 5. After the sample is filled, release the top end of the inner rod 1, and the spring 4 drives the inner rod 1 to automatically move upward and reset, so that the bottom of the inner rod 1 completely retracts into the inner hole of the outer rod 2, and the sample loaded in the sample receiving groove 5 of the inner rod 1 is sealed by the side wall of the inner hole of the outer rod 2. Then adjust the position of the locking sleeve on the outer rod 2 according to the depth that the sampling rod needs to be inserted into the glass reactor and lock it.

[0019] Next, the powdered tobacco sample is sent into the glass reactor of the pyrolysis furnace through the sampling rod. The specific operation is as follows:

[0020] Insert the sampling rod downward from the avoidance hole of the top cover into the glass reactor, and then rotate the rotary cover 8 to screw the rotary cover 8 tightly onto the mounting ring of the top cover. By squeezing the sealing ring with the tightened rotary cover 8, the gap between the avoidance hole of the top cover and the outer rod 2 is sealed, that is, the convenient installation of the sampling rod and the glass reactor is completed. Then press down the top of the inner rod 1 so that the powdered tobacco sample in the sample receiving groove 5 of the inner rod 1 is completely exposed and pyrolyzed in the glass reactor. Since the powdered tobacco sample is completely exposed, its pyrolysis is more uniform and sufficient.

[0021] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pyrolysis injection rod suitable for powdered tobacco samples, characterized in that: The utility model comprises an inner rod and an outer rod which are slidably mounted inside and outside. The outer rod is a cylindrical shape with upper and lower openings. The part of the inner rod which extends upward above the top of the outer rod is an upper extension section. The upper end of the inner rod is an external threaded end and a limit nut is mounted on the thread. A spring is mounted on the upper extension section of the inner rod. The upper and lower ends of the spring are respectively connected to the limit nut and the top of the outer rod. A circle of annular sample holding groove is opened on the periphery of the lower end of the inner rod. In a natural state, the limit nut is elastically supported by the spring, so that the sample holding groove of the inner rod is retracted into the internal channel of the outer rod, and the periphery of the sample holding groove of the inner rod is closed by the side wall of the internal channel of the outer rod.

2. A pyrolysis injection rod suitable for powdered tobacco samples as claimed in claim 1, characterized in that: The outer rod is slidably sleeved with a locking sleeve, which has a lateral locking screw hole. The lateral locking screw is screwed into the lateral locking screw hole and pressed against the outer side wall of the outer rod to lock the relative position of the locking sleeve and the outer rod.

3. A pyrolysis injection rod suitable for powdered tobacco samples as claimed in claim 2, characterized in that: The outer rod is hollowly sleeved with a screw cap, which is located below the locking sleeve; a mounting ring is provided at the top of the avoidance hole of the top cover of the glass reactor in the cracking furnace, and an external thread is provided on the mounting ring; a sealing ring is provided between the top of the mounting ring of the top cover and the screw cap; a threaded connection is formed between the inner screw hole of the screw cap and the external thread of the mounting ring; the sealing ring is squeezed by tightening the screw cap to achieve sealing of the gap between the avoidance hole of the top cover and the outer rod.

4. A pyrolysis injection rod suitable for powdered tobacco samples as claimed in claim 1, characterized in that: The sample holding groove is an arc-shaped groove with an arc-shaped cross section.

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