Quick-assembly and quick-disassembly type multifunctional thermal cracking handheld sample injector and operation method thereof

Abstract

The invention provides a quick-assembly quick-disassembly type multifunctional thermal cracking handheld sample injector and an operation method thereof.The quick-assembly quick-disassembly type multifunctional thermal cracking handheld sample injector comprises a sample injector body and a quick-assembly quick-disassembly seat, the quick-assembly quick-disassembly seat is installed on a thermal cracking heating cavity, and the sample injector body comprises a fixed cylinder, a sliding rod and an operation handle which ascends and descends together with the sliding rod; the upper end of the sliding rod is connected with the deflation button, and the lower end of the sliding rod is connected with the hook spring; a sliding button is installed on the fixing cylinder, a movement track is arranged on the operating handle, and the sliding button moves in the movement track, so that inward retraction of the hook spring, downward probing of the hook spring and cup falling of the hook spring can be achieved. By using the device, rapid sample introduction and sample cup removal can be realized, air entering the device during installation can be eliminated, and samples can be effectively prevented from being polluted by hook springs and interference on sample cracking can be effectively avoided through cup falling operation.

Description

Technical Field

[0001] The present invention relates to the technical fields of gas chromatography and mass spectrometry and their related injectors, and particularly relates to a quick-installation and quick-disassembly multifunctional thermal cracking handheld injector and an operation method thereof. Background Art

[0002] A thermal cracker mainly tests the composition components and additive components of solid samples and is applied in the fields of gas chromatography and mass spectrometry analysis. Its main function is to pyrolyze solid samples into vaporized small-molecule compounds through instantaneous high temperature and introduce them into backend analytical devices such as gas chromatography or mass spectrometry. Thermal crackers have extensive applications in the fields of polymer materials, environmental detection, biomedicine, and petrochemical industry.

[0003] When in use, the thermal cracker is in a high-temperature state, and the maximum temperature can reach 1100°C. In the case of airtightness, the sample cup containing the sample needs to be instantaneously introduced into the high-temperature cracking zone, and after pyrolysis is completed, the sample cup needs to be taken out to prepare for the next injection. However, for each injection, the sealed cracking chamber needs to be opened, which will cause air to enter and affect the test results.

[0004] For example, Patent CN201921319765 discloses a thermal cracking device, in which the top of the sample cup is slidably embedded on a limiting rod. During injection, the limiting pull rod falls into the thermal cracking device by gravity, and when taking out the sample cup, the limiting pull rod is lifted again. However, no sealing measure is mentioned. If sealing is required, the limiting pull rod cannot fall into the thermal cracking device by gravity due to the friction of sealing. If no sealing is required, it will affect the experimental results, and even the gas chromatography will alarm for insufficient pressure and stop working. Moreover, when the limiting pull rod and the sample cup fall simultaneously, the sample in the sample cup will splash out due to excessive gravity, and it does not have the function of removing the air entering during installation, affecting the experimental results.

[0005] For example, Patent CN201010122591 discloses a thermal cracker, a thermal cracking gas chromatograph, and a thermal cracking analysis method thereof. The sample is added to the sample cup for holding the sample through an injection port. When the temperature of the thermal cracking chamber reaches the set equilibrium temperature, the button of the injection port is pressed, and the sample cup is released, so that the sample cup quickly descends onto the sample loading element in the thermal cracking chamber. This operation is carried out in a sealed state, but after the sample cup falls onto the loading element and pyrolysis is completed, the sample cup cannot be grabbed, and it does not have the function of removing the air entering during sample loading.

[0006] Therefore, how to inject samples into a thermal cracker is a technical difficulty, and a handheld injector that is quick to install and disassemble and can achieve rapid injection and removal of the sample cup is needed. At the same time, it also has the function of removing the air entering during installation. Summary of the Invention

[0007] The main object of the present invention is to provide a quick-installation and quick-removal type multi-functional pyrolysis hand-held sampler and its operation method, which can realize the functions of quickly sampling and removing the sample cup, can be quickly installed and removed, and at the same time has the function of removing the air entering during sample loading.

[0008] The technical means adopted by the present invention are as follows: A quick-installation and quick-removal type multi-functional pyrolysis hand-held sampler, characterized in that it includes a sampler main body and a quick-installation and quick-removal seat, and the quick-installation and quick-removal seat is installed on the pyrolysis heating cavity, wherein: The sampler main body includes a fixed cylinder, a sliding rod that can slide up and down inside the fixed cylinder, and an operation handle located outside the fixed cylinder, and a seal is maintained between the sliding rod and the fixed cylinder; The inside of the sliding rod is a hollow structure, the upper end of the hollow structure is connected to a deflation button, and a deflation sealing ring is sleeved on the deflation button. By screwing the deflation button, it is possible to control whether the deflation sealing ring is sealed; when the sampler main body is connected to the quick-installation and quick-removal seat, the lower end of the hollow structure of the sliding rod forms a sealed connection with the quick-installation and quick-removal seat, so that the deflation button forms an airtight connection with the pyrolysis heating cavity; A fork spring is provided at the lower end of the sliding rod, and the lower end of the fork spring is a fork-shaped end, and the fork-shaped end can be inserted into the sample cup and the inner wall of the sample cup can be clamped by the tension; A guiding head is fixed at the lower end of the fixed cylinder. When the fork spring moves up with the sliding rod, the fork-shaped end of the fork spring can be squeezed by the lower end of the guiding head and lose tension and disengage from the sample cup; The operation handle is fixedly connected to the sliding rod and can drive the sliding rod to slide up and down; A sliding button is installed on the fixed cylinder, and a movement track for the sliding button to travel is provided on the operation handle. The movement track includes a lifting section extending along the axial direction of the operation handle, a high-point positioning section extending circumferentially at the high point of the lifting section, a low-point limiting section extending circumferentially at the low point of the lifting part, and a cup-dropping section extending downward at the end of the low-point limiting section; Among them, when the sliding button is located at the high point and the high-point positioning section of the lifting section, the fork spring extends downward out of the fixed cylinder. When the sliding button is located at the low point and the low-point limiting section of the lifting section, the fork spring retracts upward into the fixed cylinder. When the sliding button is located at the cup-dropping section, the fork-shaped end of the fork spring is squeezed by the guiding head.

[0009] In the quick-installation and quick-removal type multi-functional pyrolysis hand-held sampler, a buckle is provided on the lower end surface of the sliding rod, and the buckle is fixed with a gland; the upper end of the fork spring is a thin end with a diameter smaller than other parts, and the thin end passes through a lock nut and is stuck into the lower end of the spring handle. The lock nut is screwed on the spring handle to clamp and fix the fork spring with the spring handle; the upper end of the spring handle is inserted into the buckle, and the spring inside the buckle clamps and fixes the upper end of the spring handle.

[0010] The described quick - installation and quick - disassembly multi - functional pyrolysis handheld sampler, wherein the mounting base is fixed on the pyrolysis heating cavity. The pressing piece is horizontally movably arranged on the mounting base. The limiting pin is inserted upward into the pressing piece and the mounting base, capable of fixing the horizontal position of the pressing piece. A limiting spring is arranged below the limiting pin, which normally pushes the limiting pin upward. A ejecting spring is arranged between the pressing piece and the mounting base, which normally ejects the pressing piece outward. One end of the pressing piece corresponding to the ejecting spring is provided with a pressing part. One side of the lower end of the fixed cylinder of the sampler body is provided with a clamping groove, and the clamping groove can form a fixation with the clamping teeth in the pressing piece. The sampler body can be inserted downward into the mounting base, pressing down the limiting pin, so that the pressing piece is disengaged from the limitation of the mounting base. The pressing piece pops outward due to the elastic force of the ejecting spring, so that the clamping teeth in the pressing piece form a fixation with the clamping groove of the sampler body. Press the pressing part of the pressing piece, and the clamping teeth of the pressing piece can be removed from the clamping groove of the sampler body, so that the sampler body can be taken out from the quick - installation and quick - disassembly seat. Moreover, the limiting spring pops up the limiting pin to clamp the pressing piece.

[0011] The described quick - installation and quick - disassembly multi - functional pyrolysis handheld sampler, wherein a disassembly and assembly sealing ring is installed inside the mounting base for realizing the airtight connection between the sampler body and the quick - installation and quick - disassembly seat.

[0012] The described quick - installation and quick - disassembly multi - functional pyrolysis handheld sampler, wherein the fork spring is made of a high - temperature alloy material.

[0013] An operation method of a quick - installation and quick - disassembly multi - functional pyrolysis handheld sampler. The foregoing quick - installation and quick - disassembly multi - functional pyrolysis handheld sampler is characterized by including the following steps: (1) Put the sample into the sample cup and weigh it well; (2) Clamp the sample cup into the fork - shaped end of the fork spring; (3) Insert the sampler body onto the quick - installation and quick - disassembly seat; (4) Pass the carrier gas into the pyrolysis heating cavity. Loosen the air - release button. After the air in the pyrolysis heating cavity is fully expelled by the carrier gas, then tighten the air - release button; (5) Select the operation of injecting the sample with the cup, or select the operation of dropping the cup and taking the cup, wherein: The operation of injecting the sample with the cup means: The sliding button is at the low - point limiting section of the lifting section in the movement track of the operating handle, also known as the standby position. At this time, the fork spring is hidden inside the fixed cylinder, and the sample cup at the lower end of the fork spring is in the low - temperature zone; Rotate and press down the operating handle, so that the sliding button slides to the high point of the movement track of the operating handle. At this time, the sample cup is sent downward and into the high - temperature pyrolysis zone of the pyrolysis heating cavity, so that the sample in the sample cup starts high - temperature pyrolysis; Rotate the operating handle so that the sliding button is at the high-point positioning section at the high point of the movement track of the operating handle to prevent the air pressure from pushing the operating handle up; After pyrolysis is completed, rotate and lift the operating handle, and the sample cup is taken up to the standby position; The operations of dropping and taking the cup refer to: When the sliding button is at the low-point limiting section at the low point in the movement track of the operating handle, that is, the standby position, at this time, the fork spring is hidden in the fixed cylinder, and the sample cup at the lower end of the fork spring is in the low-temperature area; Rotate the operating handle to make the sliding button enter the deepest part of the low-point limiting section at the low point in the movement track, and then lift the operating handle upward to make the sliding button enter the cup-dropping section. At this time, the lower end of the guiding head presses the fork-shaped end of the fork spring, causing the fork-shaped end to lose tension and separate from the sample cup. The sample cup falls freely into the pyrolysis heating cavity, the operating handle returns to the standby position, and the sample starts pyrolysis; After pyrolysis is completed, press the operating handle down to the probing position, and the lower end of the fork spring can be inserted into the mouth of the sample cup to form a snap fit; Lift the operating handle to the standby position, and the sample cup is taken up by the fork spring.

[0014] The present invention provides a quick-installation and quick-disassembly multifunctional pyrolysis handheld sampler and its operation method, and the beneficial effects are as follows: 1. It has the functions of the sample cup falling into the pyrolysis cavity alone and entering the pyrolysis cavity along with the fork spring being pressed down. The function of falling alone can effectively avoid the contamination of the sample by the fork spring and the interference with the sample pyrolysis.

[0015] 2. It has the function of taking the sample cup, and the sample cup can be taken out of the pyrolysis cavity without disassembling the sampler and without the help of other tools, which is convenient for users to operate and reduces the entry of air.

[0016] 3. It has good airtightness. Multiple seals are adopted to seal the cavity of the pyrolysis instrument and the handheld sampler to ensure that there is no leakage of carrier gas or entry of air during the sampling process.

[0017] 4. A movement track is provided on the operating handle to realize the positioning operation of each function.

[0018] 5. The fork spring is made of high-temperature alloy material and will not oxidize within 1200 °C, thus affecting the sample test results. It will not deform or the material will not anneal and soften below 850 °C, thus affecting the service life.

[0019] 6. The thin-end design of the fork spring can effectively reduce heat conduction and avoid the temperature of the handheld sampler being affected by the pyrolysis instrument.

[0020] 7. The quick-installation and quick-disassembly structure avoids the complex operations of connecting and sealing the sampler and the pyrolysis instrument with threads.

[0021] 8. A deflation button is provided, which solves the problem of air discharge into the pyrolysis chamber when installing the injector.

[0022] 9. Function fixed-point positions are provided on the operation handle for the convenience of customers.

[0023] 10. Installation direction marks are provided on both the handheld injector and the quick-install and quick-remove seat to help customers identify the installation direction of the handheld injector and avoid unsmooth installation. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the overall assembly structure of the handheld injector of the present invention; Figure 2 It is a front view of the handheld injector of the present invention; Figure 3 It is a schematic sectional view of the handheld injector of the present invention; Figure 4 It is a sectional view of the handheld injector of the present invention installed on the quick-install and quick-remove seat; Figure 5A 、 Figure 5B They are respectively the front view and sectional view of the handheld injector of the present invention in the standby state; Figure 6 They are respectively the front view and sectional view of the handheld injector of the present invention in the cup-dropping state; Figure 7 It is a schematic diagram of the handheld injector of the present invention in the state of probing or picking up the sample cup.

[0025] Description of the reference numerals: 1 - injector body; 2 - quick-install and quick-remove seat; 3 - pyrolysis heating cavity; 101 - deflation button; 102 - fixed cylinder; 103 - guiding head; 104 - spring handle; 105 - lock nut; 106 - fork spring; 107 - sample cup; 108 - operation handle; 109 - sliding button; 110 - set screw; 111 - deflation sealing ring; 112 - upper sealing ring; 113 - lower sealing ring; 114 - buckle; 115 - gland; 116 - sliding rod; 201 - limit pin; 202 - limit spring; 203 - disassembly and installation sealing ring; 204 - installation seat; 205 - ejecting spring; 206 - pressing piece; 2061 - locking teeth. Detailed Embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Such as Figure 2 、Figure 3 As shown, it is the front view and sectional view of a quick - installation and quick - disassembly type multi - functional pyrolysis handheld sampler provided by the present invention, which includes a sampler body 1 and a quick - installation and quick - disassembly base 2.

[0028] As Figure 1 shown, it is the schematic diagram of the overall assembly structure where the sampler body 1 of the present invention is installed on the pyrolysis heating cavity 3 through the quick - installation and quick - disassembly base 2. Combining Figure 1 、 Figure 4 shown, the quick - installation and quick - disassembly base 2 is fixedly installed at the sample inlet of the pyrolysis heating cavity 3, enabling the sampler body 1 to be quickly installed on and quickly disassembled from the pyrolyzer.

[0029] As Figure 2 、 Figure 3 、 Figure 5A 、 Figure 6 and Figure 7 shown, the sampler body 1 includes a fixed cylinder 102 and a sliding rod 116 that can slide up and down inside the fixed cylinder 102. Upper sealing rings 112 and lower sealing rings 113 are installed on the sliding rod 116 to maintain the seal between the sliding rod 116 and the fixed cylinder 102; A buckle 114 is provided on the lower end face of the sliding rod 116, and the buckle 114 is fixed with a gland 115; A fork spring 106, one end of which is a thin end with a diameter smaller than the other parts. The thin end passes through a lock nut 105 and is clamped into the lower end of a spring handle 104. The lock nut 105 is screwed tightly on the spring handle 104 to clamp and fix the fork spring 106 by the spring handle 104. The upper end of the spring handle 104 is inserted into the buckle 114, and a spring inside the buckle 114 clamps and fixes the upper end of the spring handle 104. The other end of the fork spring 106 is a fork - shaped end, and the fork - shaped end can be inserted into the sample cup 107, and the inner wall of the sample cup 107 is clamped tightly by the tension of the fork - shaped end; Among them, the fork spring 106 is made of a high - temperature alloy material and will not oxidize within 1200 °C, thus affecting the sample test results, and will not deform or the material will not anneal and soften below 850 °C, thus affecting the service life; A guide head 103 is fixedly screwed at the lower end face of the fixed cylinder 102; when the fork spring 106 moves up to the highest point along with the sliding rod 116, the lower end of the guide head 103 can squeeze the fork - shaped end of the fork spring 106, causing the fork - shaped end to lose tension and separate from the sample cup 107; An operating handle 108 is installed on the sliding rod 116 (fixed by three setscrews 110). The operating handle 108 is located outside the fixed cylinder 102 for easy hand - holding operation; when the operating handle 108 slides up and down, it will drive the sliding rod 116 to slide up and down; A rotatable slide button 109 is installed on the fixed cylinder 102 by screws, and a movement track for the slide button 109 to travel is provided on the operating handle 108. In this way, on the one hand, the relative position of the sliding rod 116 can be intuitively understood through the slide button 109, and on the other hand, through the interference between the movement track (circumferential part) and the slide button 109, the positioning operation after reaching the position can be realized; Among them, the movement track includes a lifting section extending along the axial direction of the operating handle 108, and a high-point positioning section extends circumferentially at the high point of the lifting section (when the slide button 109 is located at the high point of the lifting section and the high-point positioning section, the fork spring 106 extends downward out of the fixed cylinder 102, as Figure 7 ) The low point of the lifting part extends circumferentially with a low-point limiting section (when the slide button 109 is located at the low point of the lifting section and the low-point limiting section, the fork spring 106 retracts upward into the fixed cylinder 102, as Figure 5A ) A dropping section extends downward at the end of the low-point limiting section (when the slide button 109 is located at the dropping section, the fork-shaped end of the fork spring 106 presses against the guide head 103, as Figure 6 ); An air release button 101 is installed at the upper end of the sliding rod 116. An air release sealing ring 111 is sleeved on the air release button 101, passes through the operating handle 108, and is screwed into the screw hole on the sliding rod 116. By screwing the air release button 101, it is possible to control whether the air release sealing ring 111 is sealed, thereby realizing the function of manual air release; Specifically, the inside of the sliding rod 116 is a hollow structure. The upper end of the hollow structure is connected to the air release button 101, and the lower end forms a sealed connection with the inner wall of the fixed cylinder 102 through an upper sealing ring 112 and a lower sealing ring 113. The lower end of the fixed cylinder 102 forms a sealed connection with the quick-release seat 2 through a disassembly and assembly sealing ring 203, so that the air release button 101 is in communication with the pyrolysis heating cavity 3.

[0030] As Figure 4 shown, the quick-release seat 2 is composed of a limit pin 201, a limit spring 202, a mounting seat 204, an ejection spring 205 and a pressing piece 206, where: The mounting seat 204 is fixed on the pyrolysis heating cavity 3. The pressing piece 206 is horizontally movably arranged on the mounting seat 204. The limit pin 201 is inserted upward into the pressing piece 206 and the mounting seat 204, and can fix the horizontal position of the pressing piece 206; A limit spring 202 is arranged below the limit pin 201, which normally holds the limit pin 201 upward. An ejection spring 205 is arranged between the pressing piece 206 and the mounting seat 204, which normally ejects the pressing piece 206 outward. One end of the pressing piece 206 corresponding to the ejection spring 205 is provided with a pressing part; On one side of the lower end of the fixed cylinder 102 of the injector body 1, there is a card slot (not shown); when the injector body 1 is inserted downward into the mounting base 204, the injector body 1 presses down the limit pin 201, the pressing piece 206 is disengaged from the limit of the mounting base 204, and the pressing piece 206 pops out outward due to the elastic force of the ejecting spring 205, so that the engaging teeth 2061 in the pressing piece 206 are fixed with the card slot of the injector body 1; the rapid connection between the injector body 1 and the quick-loading and quick-unloading seat 2 is completed; When pressing the pressing part of the pressing piece 206, the engaging teeth 2061 of the pressing piece 206 are removed from the card slot of the injector body 1, the limit spring 202 pops up the limit pin 201, which catches the pressing piece 206, and the injector body 1 can be quickly taken out from the quick-loading and quick-unloading seat 2.

[0031] In addition, a disassembly and assembly sealing ring 203 is installed inside the mounting base 204 for sealing between the injector body 1 and the quick-loading and quick-unloading seat 2.

[0032] The following details the structure and operation method of the invention through the operation process: Before installing the injector body 1, the sample is placed in the sample cup 107 and weighed; As Figure 2 , the sample cup 107 is snapped into the fork-shaped end of the fork spring 106; As Figure 1 , align the marks on the injector body 1 and the quick-loading and quick-unloading seat 2, and insert the injector body 1 onto the quick-loading and quick-unloading seat 2; at this time, as Figure 4 shown, the injector body 1 presses down the limit pin 201, and the pressing piece 206 pops out outward due to the ejecting spring 205, so that the engaging teeth 2061 of the pressing piece 206 are inserted into the card slot of the injector body 1, and a communication in a sealed state is formed between the injector body 1 and the quick-loading and quick-unloading seat 2; The pyrolysis heating cavity 3 is not in a sealed state. Therefore, after the injector body 1 is installed, there is air in the pyrolysis heating cavity 3; at this time, carrier gas is introduced into the pyrolysis heating cavity 3, the air release button 101 is loosened, and after the air in the pyrolysis heating cavity 3 is fully expelled by the carrier gas, the air release button 101 is tightened; Holding the operation handle 108 by hand, the operation of injecting the sample with the cup can be completed, or the operations of dropping the cup and taking the cup can be completed, where: The so-called operation of injecting the sample with the cup means: As Figure 5A , Figure 5B shown, the sliding button 109 is at the low point limit section of the lifting section in the movement track of the operation handle 108, which is also called the standby position. At this time, the fork spring 106 is hidden inside the fixed cylinder 102, and the sample cup 107 at the lower end of the fork spring 106 is in the low temperature zone and no sample injection has occurred; Rotate and press down the operating handle 108 to slide the slider 109 to the high point of the movement track of the operating handle 108. As Figure 7 shown, at this time, the sample cup 107 is inserted downward into the high-temperature pyrolysis zone of the pyrolysis heating cavity 3, and the sample in the sample cup 107 starts high-temperature pyrolysis; Rotate the operating handle 108 to make the slider 109 located at the high-point positioning section at the high point of the movement track of the operating handle 108. As Figure 2 shown, this position can prevent the air pressure from pushing up the operating handle 108, resulting in incomplete pyrolysis; After pyrolysis is completed, rotate and lift the operating handle 108, and the sample cup 107 is taken up to the standby position, that is Figure 5A the position shown.

[0033] The above operation of injecting the sample with the cup is an injection operation in which the sample cup 107 is pressed into the pyrolysis heating cavity 3 while being carried by the fork spring 106 from beginning to end, and is suitable for injecting samples that are prone to splashing, such as powder or liquid samples.

[0034] The so-called operation of dropping the cup and taking the cup is an injection operation in which the sample cup 107 can be separated from the fork spring 106, and it includes: As Figure 5A , Figure 5B shown, when the slider 109 is at the low-point limiting section at the low point of the movement track of the operating handle 108, that is, the standby position, at this time, the fork spring 106 is hidden in the fixed cylinder 102, and the sample cup 107 at the lower end of the fork spring 106 is in the low-temperature zone and has not been injected; Rotate the operating handle 108 to make the slider 109 enter the deepest part of the low-point limiting section at the low point of the movement track, and then lift the operating handle 108 upward to make the slider 109 enter Figure 6 the cup-dropping section shown. At this time, the lower end of the guide head 103 presses the fork-shaped end of the fork spring 106, causing the fork-shaped end to contract and separate from the sample cup 107, and the sample cup 107 falls freely into the pyrolysis heating cavity 3. The operating handle 108 returns to Figure 5A the standby position shown, and the sample starts thermal pyrolysis; After thermal pyrolysis is completed, press down the operating handle 108 to Figure 7 the downward-probing position shown, and the two lower ends of the fork spring 106 with relative inclined surfaces can be inserted into the mouth of the sample cup 107 to form a snap fit; Lift the operating handle 108 to Figure 5A the standby position shown, and at this time, the sample cup 107 is successfully taken up.

Claims

1. A quick-installation and quick-removal type multi-functional pyrolysis handheld sampler, characterized in that, It includes a sampler body and a quick-loading and quick-unloading seat, and the quick-loading and quick-unloading seat is installed on the pyrolysis heating cavity, where: The sampler body includes a fixed cylinder, a sliding rod that can slide up and down inside the fixed cylinder, and an operating handle located outside the fixed cylinder. A seal is maintained between the sliding rod and the fixed cylinder. The inside of the sliding rod is a hollow structure. The upper end of the hollow structure is connected to a deflation button, and a deflation sealing ring is sleeved on the deflation button. By screwing the deflation button, it is possible to control whether the deflation sealing ring is sealed. When the sampler body is connected to the quick-loading and quick-unloading seat, the lower end of the hollow structure of the sliding rod forms a sealed connection with the quick-loading and quick-unloading seat, enabling the deflation button to form an airtight connection with the pyrolysis heating cavity. A fork spring is provided at the lower end of the sliding rod. The lower end of the fork spring is a fork-shaped end, and the fork-shaped end can be inserted into the sample cup and use the tension to clamp the inner wall of the sample cup. A guiding head is fixed at the lower end of the fixed cylinder. When the fork spring moves upward with the sliding rod, the fork-shaped end of the fork spring can be squeezed by the lower end of the guiding head, losing tension and disengaging from the sample cup. The operating handle is fixedly connected to the sliding rod and can drive the sliding rod to slide up and down. A sliding button is installed on the fixed cylinder, and a movement track for the sliding button to travel is provided on the operating handle. The movement track includes a lifting section extending along the axial direction of the operating handle. At the high point of the lifting section, a high-point positioning section extends circumferentially. At the low point of the lifting section, a low-point limiting section extends circumferentially. At the end of the low-point limiting section, a cup-dropping section extends downward. Among them, when the sliding button is at the high point and the high-point positioning section of the lifting section, the fork spring extends downward out of the fixed cylinder. When the sliding button is at the low point and the low-point limiting section of the lifting section, the fork spring retracts upward inside the fixed cylinder. When the sliding button is at the cup-dropping section, the fork-shaped end of the fork spring is squeezed by the guiding head.

2. The quick-installation and quick-removal type multi-functional pyrolysis hand-held sampler according to claim 1, characterized in that, A buckle is provided on the lower end surface of the sliding rod, and the buckle is fixed with a gland. The upper end of the fork spring is a thin end with a diameter smaller than other parts. The thin end passes through a lock nut and is stuck into the lower end of the spring handle. The lock nut is screwed on the spring handle to clamp and fix the fork spring with the spring handle. The upper end of the spring handle is inserted into the buckle, and a spring inside the buckle clamps and fixes the upper end of the spring handle.

3. The quick-installation and quick-removal type multi-functional pyrolysis handheld sampler according to claim 1, characterized in that, The mounting seat is fixed on the pyrolysis heating cavity. The pressing piece is horizontally movably arranged on the mounting seat. The limiting pin is inserted upward into the pressing piece and the mounting seat, and can fix the horizontal position of the pressing piece. A limiting spring is arranged below the limiting pin and normally pushes the limiting pin upward. A ejecting spring is arranged between the pressing piece and the mounting seat and normally ejects the pressing piece outward. One end of the pressing piece corresponding to the ejecting spring is provided with a pressing part. A card slot is provided on one side of the lower end of the fixed cylinder of the sampler body, and the card slot can form a fixation with the teeth inside the pressing piece. The sampler body can be inserted downward into the mounting seat, pressing down the limiting pin to disengage the pressing piece from the mounting seat. The pressing piece pops outward due to the elastic force of the ejecting spring, enabling the teeth inside the pressing piece to form a fixation with the card slot of the sampler body. Pressing the pressing part of the pressing piece, the teeth of the pressing piece can be removed from the card slot of the sampler body, enabling the sampler body to be taken out from the quick-loading and quick-unloading seat, and the limiting spring pops up the limiting pin to lock the pressing piece.

4. The quick-installation and quick-removal type multi-functional pyrolysis handheld sampler according to claim 3, characterized in that, An assembly and disassembly sealing ring is installed inside the mounting base to achieve airtight connection between the injector body and the quick-loading and quick-unloading seat.

5. The quick-installation and quick-disassembly multifunctional pyrolysis handheld sampler according to claim 1, characterized in that, The fork spring is made of a high-temperature alloy material.

6. An operating method of a quick-installation and quick-disassembly multifunctional pyrolysis handheld sampler, using the quick-installation and quick-disassembly multifunctional pyrolysis handheld sampler according to any one of claims 1-4, characterized in that, It includes the following steps: (1) Put the sample into the sample cup and weigh it. (2) Snap the sample cup into the fork-shaped end of the fork spring. (3) Insert the injector body onto the quick-loading and quick-unloading seat. (4) Pass the carrier gas into the pyrolysis heating cavity, loosen the bleed valve. After the air in the pyrolysis heating cavity is fully expelled by the carrier gas, tighten the bleed valve again. (5) Select the operation of injecting with the cup or the operation of dropping the cup and taking the cup. Among them: The operation of injecting with the cup means: The sliding button is at the low-point limit section of the lifting section in the movement track of the operating handle, also known as the standby position. At this time, the fork spring is hidden inside the fixed cylinder, and the sample cup at the lower end of the fork spring is in the low-temperature zone. Rotate and press down the operating handle to make the sliding button slide to the high point of the movement track of the operating handle. At this time, the sample cup is sent down and into the high-temperature pyrolysis zone of the pyrolysis heating cavity, causing the sample in the sample cup to start high-temperature pyrolysis. Rotate the operating handle to make the sliding button at the high-point positioning section of the high point of the movement track of the operating handle to prevent the air pressure from pushing the operating handle up. After pyrolysis is completed, rotate and lift the operating handle, and the sample cup is taken up to the standby position. The operation of dropping the cup and taking the cup means: When the sliding button is at the low-point limit section of the low point in the movement track of the operating handle, that is, the standby position. At this time, the fork spring is hidden inside the fixed cylinder, and the sample cup at the lower end of the fork spring is in the low-temperature zone. Rotate the operating handle to make the sliding button enter the deepest part of the low-point limit section at the low point in the movement track, and then lift the operating handle upward to make the sliding button enter the cup-dropping section. At this time, the lower end of the guide head presses the fork-shaped end of the fork spring, causing the fork-shaped end to lose tension and disengage from the sample cup, and the sample cup free-falls into the pyrolysis heating cavity. The operating handle returns to the standby position, and the sample starts pyrolysis. After pyrolysis is completed, press down the operating handle to the downward-probing position, and the lower end of the fork spring can be inserted into the mouth of the sample cup to form a snap fit. Lift the operating handle to the standby position, and the sample cup is picked up by the fork spring.

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