A microwave digestion tank with rapid pressure reduction structure

Abstract

The application discloses a microwave digestion tank with a rapid pressure reduction structure and relates to the technical field of microwave digestion tanks. The microwave digestion tank with the rapid pressure reduction structure comprises a tank body and a tank cover, an installation cavity is formed in the tank cover, a through hole is formed in the bottom of the installation cavity, and an exhaust pipe is fixedly connected to the top of the through hole. When the microwave digestion tank with the rapid pressure reduction structure is rapidly depressurized, high-pressure gas in the sealed cavity can be separated from liquid through a gas-liquid separation device when the high-pressure gas is discharged through the through hole, the gas is discharged, the liquid returns to the sealed cavity, the liquid in the tank body is prevented from being carried out by the airflow, and the accuracy of detection results is ensured.

Description

Technical Field

[0001] This invention relates to the field of microwave digestion vessel technology, specifically to a microwave digestion vessel with a rapid pressure reduction structure. Background Technology

[0002] The microwave digestion method for analyzing samples involves placing a sealed microwave digestion vessel containing the sample and solvent into a microwave heating instrument for heating. Microwave digestion is a highly efficient sample pretreatment method that utilizes microwave heating of the digestion solution (various acids, some alkalis, and salts) and sample within a sealed digestion vessel, thereby rapidly dissolving various samples under high temperature and high pressure conditions. During the heating process, the sample and solvent undergo a chemical reaction within the digestion vessel, generating a large amount of gas and creating high temperature and pressure. After microwave digestion, the sample must be cooled and the pressure reduced before the vessel can be opened to remove the acid. The waiting time for pressure reduction is typically more than half a day. To improve the depressurization speed, an exhaust pipe is usually installed on the vessel lid to discharge high-pressure gas. When rapid depressurization is required, the gas is discharged through the exhaust pipe.

[0003] However, existing microwave digestion vessels with rapid depressurization structures release pressure continuously through an exhaust pipe during use. If the depressurization rate is too fast, the liquid inside the vessel may be carried out by the airflow, affecting the accuracy of the test results. Summary of the Invention

[0004] The purpose of this invention is to provide a microwave digestion vessel with a rapid pressure reduction structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a microwave digestion vessel with a rapid pressure reduction structure, comprising a digestion vessel body; the digestion vessel body includes a vessel body, a vessel cover sealed to the vessel body, and a sealing cavity located between the vessel body and the vessel cover; the vessel cover has a through hole communicating with the sealing cavity and a gas-liquid separation device disposed on the through hole.

[0006] Preferably, the gas-liquid separation device includes an exhaust pipe connected to a through hole and an annular sleeve fitted outside the exhaust pipe; the exhaust pipe and the annular sleeve form an air flow channel after being connected; the gas-liquid separation device also includes a heat sink connected to the exhaust pipe and disposed in the air flow channel, an air inlet pipe and an air outlet pipe connected to the air flow channel.

[0007] Preferably, the heat sink is arranged in a spiral shape, dividing the airflow channel into a spiral channel. The lower part of the spiral channel is connected to the air intake pipe, and the upper part of the spiral channel is connected to the air outlet pipe.

[0008] Preferably, the can lid further includes a regulating device for adjusting the flow rate of the discharged gas; the regulating device includes a sealing plate slidably connected to the bottom of the through hole and a first pushing mechanism for moving the sealing plate; the regulating device further includes a top plate fixed to the top of the exhaust pipe, a piston sliding inside the exhaust pipe and movably sealing the exhaust pipe, and a second pushing mechanism for moving the piston; the regulating device further includes multiple round holes opened at the bottom of the piston and an exhaust pipe connected to the top of the exhaust pipe; the regulating device further includes a mixing cover connected to the can lid and multiple exhaust holes opened on the mixing cover; the exhaust ends of the gas outlet pipe and the exhaust pipe are connected to the mixing cover.

[0009] Preferably, the first pushing mechanism includes a first moving rod that slides on the can lid, a connecting block fixed to the side wall of the sealing plate, and a connecting rod that rotates between the lower end of the first moving rod and the connecting block; the first pushing mechanism also includes a guide rail fixed to the bottom of the can lid, so that the sealing plate can slide on the guide rail.

[0010] Preferably, the second pushing mechanism includes a pushing rod connected to the piston; the pushing rod includes a second moving rod slidably connected to the top plate; the second moving rod passes through the top plate and is fixed to the piston; the second pushing mechanism also includes a fixing ring connected to the second moving rod and a second spring connecting the fixing ring and the top plate; the second spring is sleeved on the outside of the second moving rod.

[0011] Preferably, the adjusting device further includes a driving mechanism for driving the first pushing mechanism and the second pushing mechanism to move sequentially; the driving mechanism includes a second disc fixedly connected to the can lid, a sliding rod connected to the second disc, and a pushing plate connected to the sliding rod; the sliding rod includes a connecting rod slidably connected to the second disc, and the connecting rod passes through the second disc and is fixedly connected to the pushing plate; the adjusting device further includes a first disc fixedly connected to the connecting rod and a first spring abutting between the first disc and the second disc, the first spring being sleeved outside the connecting rod; the sliding rod further includes a pressing plate fixed to the upper end of the sliding rod; the adjusting device further includes a spring telescopic rod connected between the first moving rod and the pushing plate; the adjusting device further includes an installation cavity disposed within the can lid, the driving mechanism being located in the upper part of the installation cavity, and the adjusting device being located in the lower part of the installation cavity.

[0012] Preferably, the gas-liquid separation device further includes a gas supply mechanism for supplying gas to the air inlet pipe; the gas supply mechanism includes a fixed cover sleeved on the second disc and the first disc; the fixed cover is fixed to the second disc; a gas supply chamber is formed between the first disc, the second disc and the fixed cover; the upper end of the air inlet pipe communicates with the gas supply chamber; the gas supply mechanism also includes an air extraction pipe communicating with the gas supply chamber and a vent hole communicating with the mounting cavity; the gas-liquid separation device further includes a first one-way valve disposed in the air extraction pipe and a second one-way valve disposed in the air inlet pipe.

[0013] Preferably, the adjusting device further includes a self-locking mechanism for self-locking and limiting the sealing plate; the self-locking mechanism includes a mounting hole at the bottom of the can lid, a limiting block fixed to the side wall of the connecting block, and an insertion hole at the top of the limiting block; the self-locking mechanism also includes a limiting rod inserted into the mounting hole, a scale mark on the limiting rod, and a reset mechanism for resetting the limiting rod; the limiting rod is inserted into the mounting cavity and passes through the top of the can lid.

[0014] Preferably, the reset mechanism includes a ring fixed to the limiting rod, an L-shaped block sleeved on the side wall of the limiting rod and fixed to the bottom of the mounting cavity, and a third spring connected between the L-shaped block and the ring; the third spring is sleeved on the outside of the limiting rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This type of microwave digestion vessel with a rapid pressure reduction structure, by setting up a gas-liquid separation device, can separate the gas and liquid when the high-pressure gas in the sealed cavity is discharged through the through hole. The gas is discharged and the liquid returns to the sealed cavity, preventing the liquid in the vessel from being carried out by the gas flow and ensuring the accuracy of the test results. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a cross-sectional view of the can lid in this invention;

[0020] Figure 4 This is a partial cross-sectional view of the fixing cover in this invention;

[0021] Figure 5 This is a cross-sectional view of the exhaust pipe and the annular sleeve in this invention.

[0022] Figure 6 This is a schematic diagram of the moving mechanism and the limiting mechanism in this invention;

[0023] Figure 7 for Figure 4 A magnified structural diagram of point A in the middle.

[0024] In the diagram: 101, tank body; 102, tank lid; 201, sliding rod; 202, pressing plate; 203, fixing cover; 204, connecting rod; 205, first spring; 206, suction pipe; 207, air inlet pipe; 208, air outlet pipe; 209, first disc; 210, vent hole; 211, second disc; 501, second moving rod; 502, fixing ring; 503, second spring; 504, push rod; 505, push plate; 601, guide rail; 602, first moving rod; 603, connecting rod; 604. Connecting block; 605, Spring telescopic rod; 701, Mounting hole; 702, Limiting block; 703, Insertion hole; 708, Limiting rod; 709, Scale mark; 801, L-shaped block; 802, Ring; 803, Third spring; 901, Annular sleeve; 902, Heat sink; 1001, Mixing cover; 1002, Exhaust hole; 1101, Mounting cavity; 1102, Through hole; 1103, Exhaust pipe; 1104, Sealing plate; 1105, Piston; 1106, Round hole; 1107, Discharge pipe; 1108, Top plate. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1-7 This invention provides a microwave digestion vessel with a rapid pressure reduction structure, comprising a digestion vessel body; the digestion vessel body includes a vessel body 101, a vessel cover 102 sealed to the vessel body 101, and a sealed cavity between the vessel body 101 and the vessel cover 102. The vessel cover 102 is designed as a two-part structure, facilitating the installation, disassembly, cleaning, and maintenance of internal components; the vessel cover 102 has a through hole 1102 communicating with the sealed cavity and a gas-liquid separation device disposed on the through hole 1102. When the high-pressure gas in the sealed cavity is discharged through the through hole 1102, it can be separated into gas and liquid by the gas-liquid separation device, so that the gas is discharged and the liquid returns to the sealed cavity, preventing the liquid in the vessel body 101 from being carried out by the gas flow and ensuring the accuracy of the test results.

[0027] The gas-liquid separation device includes an exhaust pipe 1103 connected to a through hole 1102 and an annular sleeve 901 sleeved outside the exhaust pipe 1103; the exhaust pipe 1103 and the annular sleeve 901 form an air flow channel after being connected; the gas-liquid separation device also includes a heat sink 902 connected to the exhaust pipe 1103 and disposed in the air flow channel, an inlet pipe 207 connected to the air flow channel, and an outlet pipe 208. When the high-pressure gas in the sealed cavity is discharged through the through hole 1102, it can enter the exhaust pipe 1103. At the same time, the outside air can enter the air flow channel through the inlet pipe 207 and blow onto the heat sink 902 and the exhaust pipe 1103, and then be discharged through the outlet pipe 208. This can cool and depressurize the high-pressure gas in the exhaust pipe 1103 and condense it, so that the condensed liquid can slide down along the exhaust pipe 1103 into the sealed cavity, which facilitates the cooling and depressurization of the discharged high-pressure gas, and at the same time, facilitates the condensation and separation of the liquid in the gas.

[0028] The heat sink 902 is spirally arranged and the air flow channel is divided into a spiral flow channel. The lower part of the spiral flow channel is connected to the air inlet pipe 207 and the upper part of the spiral flow channel is connected to the air outlet pipe 208. This can increase the flow path of external air in the air flow channel. At the same time, it can increase the heat exchange area of ​​the heat sink 902, thereby improving the heat exchange effect and the condensation effect of liquid in high pressure gas.

[0029] The can lid 102 also includes a regulating device for adjusting the flow rate of the exhaust gas; the regulating device includes a sealing plate 1104 slidably connected to the bottom of the through hole 1102 and a first pushing mechanism for moving the sealing plate 1104; the regulating device also includes a top plate 1108 fixed to the top of the exhaust pipe 1103, a piston 1105 slidably inside the exhaust pipe 1103 and movably sealing the exhaust pipe 1107, and a second pushing mechanism for moving the piston 1105; the regulating device also includes a plurality of circular holes 1106 opened at the bottom of the piston 1105 and an exhaust pipe 1107 connected to the top of the exhaust pipe 1103; the regulating device It also includes a mixing shroud 1001 connected to the can lid 102 and multiple exhaust holes 1002 opened on the mixing shroud 1001; the exhaust ends of the exhaust pipe 208 and the discharge pipe 1107 are connected to the mixing shroud 1001. During exhaust, the gas discharged from the exhaust pipe 208 and the discharge pipe 1107 can be mixed in the mixing shroud 1001 and discharged through the exhaust holes 1002, which can achieve a secondary cooling effect, making the exhaust safer and more reliable. During exhaust, the sealing plate 1104 is first moved by the first pushing mechanism to block and seal the through hole 1102. Then, the valve is pushed by the second pushing mechanism. The plug 1105 moves downward along the exhaust pipe 1103, scraping and cleaning the condensate on the inner wall of the exhaust pipe 1103 and collecting it on the sealing plate 1104. Simultaneously, the piston 1105 no longer seals the discharge pipe 1107, allowing the high-pressure gas in the exhaust pipe 1103 to exit through the round hole 1106 and the discharge pipe 1107. After exiting, the second pushing mechanism moves the piston 1105 upward to seal the discharge pipe 1107. Then, the first pushing mechanism moves the sealing plate 1104 back to its original position, ensuring that the through hole 1102 is open. At this point... The high-pressure gas inside the tank 101 can continue to enter the exhaust pipe 1103 through the through hole 1102. After filling is completed, when the sealing plate 1104 continues to move, the condensed liquid collected on the top of the sealing plate 1104 can be scraped off and fall back into the tank 101, preventing the liquid from being carried out by the airflow and ensuring the accuracy of the test results. By repeating this process, the high-pressure gas inside the tank 101 can be discharged in a fixed volume. Furthermore, during discharge, the tank 101 can be sealed to prevent the liquid inside the tank 101 from being carried out by the airflow due to excessive pressure relief, ensuring the accuracy of subsequent tests and making the process safer and more reliable.

[0030] The first pushing mechanism includes a first moving rod 602 that slides on the can lid 102, a connecting block 604 fixed to the side wall of the sealing plate 1104, and a connecting rod 603 that rotates between the lower end of the first moving rod 602 and the connecting block 604. The first pushing mechanism also includes a guide rail 601 fixed to the bottom of the can lid 102, so that the sealing plate 1104 can slide on the guide rail 601. When the first moving rod 602 moves downward, it can cause the connecting rod 603 to rotate and push the sealing plate 1104 along the guide rail 601 through the connecting block 604 to seal the through hole 1102. When the first moving rod 602 moves upward, it can drive the sealing plate 1104 to move and reset and open the through hole 1102, making the sealing and opening of the through hole 1102 more convenient and quick.

[0031] The second pushing mechanism includes a pushing rod 504 connected to the piston 1105; the pushing rod 504 includes a second moving rod 501 slidably connected to the top plate 1108; the second moving rod 501 passes through the top plate 1108 and is fixed to the piston 1105; the second pushing mechanism also includes a fixing ring 502 connected to the second moving rod 501 and a second spring 503 connecting the fixing ring 502 and the top plate 1108; the second spring 503 is sleeved on the outside of the second moving rod 501. When the pushing rod 504 moves downward, it can drive the piston 1105 downward through the second moving rod 501. At the same time, it drives the fixing ring 502 downward, the second spring 503 is compressed, and the pushing rod 504 and the fixing ring 502 can move upward and reset under the action of the second spring 503, and drive the piston 1105 upward and reset through the second moving rod 501, thereby facilitating the lifting and lowering of the piston 1105.

[0032] The adjusting device also includes a driving mechanism for driving the first and second pushing mechanisms to move sequentially; the driving mechanism includes a second disc 211 fixedly connected to the can lid 102, a sliding rod 201 connected to the second disc 211, and a pushing plate 505 connected to the sliding rod 201. The sliding rod 201 includes a connecting rod 204 slidably connected to the second disc 211, the connecting rod 204 passing through the second disc 211 and fixedly connected to the pushing plate 505; the adjusting device also includes a first disc 209 fixedly connected to the connecting rod 204 and a first spring 205 abutting between the first disc 209 and the second disc 211, the first spring 205 being sleeved outside the connecting rod 204; the sliding rod 201 also... The device includes a pressing plate 202 fixed to the upper end of the sliding rod 201; the adjusting device also includes a spring telescopic rod 605 connected between the first moving rod 602 and the push plate 505; the adjusting device also includes a mounting cavity 1101 disposed in the can lid 102, with the driving mechanism located at the upper part of the mounting cavity 1101 and the adjusting device located at the lower part of the mounting cavity 1101. When pressure reduction is required, pressing the pressing plate 202 causes the first disc 209 to move downward via the sliding rod 201. At the same time, the push plate 505 moves downward via the connecting rod 204, compressing the first spring 205 and causing the first moving rod 602 to move downward via the spring telescopic rod 605, thus rotating the connecting rod 603 and enabling the passage of pressure. The connecting block 604 pushes the sealing plate 1104 to move along the guide rail 601, allowing it to reach the bottom of the through hole 1102 and seal it. When the sealing plate 1104 stops moving, the pushing plate 505 continues to move downwards, compressing the spring telescopic rod 605. When the pushing plate 505 abuts against the upper end of the pushing rod 504, it pushes the pushing rod 504 downwards, and through the second moving rod 501, drives the piston 1105 downwards, compressing the second spring 503. When the pressing plate 202 is released, the sliding rod 201 moves upwards to reset under the action of the first spring 205, and drives the pushing plate 505 upwards. At this time, the spring telescopic rod 605 gradually... The first moving rod 602 remains stationary while the push rod 504 moves upward under the action of the second spring 503 to reset. It also drives the piston 1105 to move upward through the second moving rod 501. When the piston 1105 moves and comes into contact with the top plate 1108 to seal the discharge pipe 1107, the spring telescopic rod 605 resets. When the push plate 505 continues to move upward, it can drive the first moving rod 602 to move upward through the spring telescopic rod 605, thereby driving the sealing plate 1104 to move and gradually open. The effect of driving the first moving rod 602 and the push rod 504 to move sequentially can be achieved by pressing the pressing plate 202, making it more convenient and faster to use.

[0033] The gas-liquid separation device also includes a gas supply mechanism for supplying gas to the air inlet pipe 207; the gas supply mechanism includes a fixed cover 203 sleeved around the second disc 211 and the first disc 209; the fixed cover 203 is fixed to the second disc 211; a gas supply chamber is formed between the first disc 209, the second disc 211 and the fixed cover 203; the upper end of the air inlet pipe 207 communicates with the gas supply chamber; the gas supply mechanism also includes an air extraction pipe 206 communicating with the gas supply chamber and a vent 210 communicating with the mounting cavity 1101; the gas-liquid separation device also includes a first one-way valve disposed in the air extraction pipe 206 and a second one-way valve disposed in the air inlet pipe 207, the first one-way valve being open from the mounting cavity 1101 to the gas supply chamber, and the second one-way valve being open from the gas supply chamber to the air flow channel, when the pressing plate 202 is pressed, when the sliding rod 201 moves downward, it can drive the first disc. When 209 moves downward, it compresses the air in the air supply chamber. At the same time, the first one-way valve closes and the second one-way valve opens, allowing the air in the air supply chamber to enter the air flow channel through the air inlet pipe 207. This cools the high-pressure gas in the exhaust pipe 1103 and causes the liquid to condense. When the pressing plate 202 is released, the sliding rod 201 moves upward to reset, which drives the first disc 209 to move upward, creating negative pressure in the air supply chamber. At the same time, the first one-way valve opens and the second one-way valve closes, allowing external air to enter the mounting cavity 1101 through the vent 210 and then enter the air supply chamber through the suction pipe 206. By repeatedly pressing the pressing plate 202, external air can be supplied into the air inlet pipe 207 and then into the air flow channel through the air inlet pipe 207, making it more convenient and faster to use.

[0034] The adjusting device also includes a self-locking mechanism for self-locking and limiting the sealing plate 1104; the self-locking mechanism includes a mounting hole 701 at the bottom of the can lid 102, a limiting block 702 fixed to the side wall of the connecting block 604, and an insertion hole 703 at the top of the limiting block 702; the self-locking mechanism also includes a limiting rod 708 inserted into the mounting hole 701, a scale mark 709 on the limiting rod 708, and a reset mechanism for resetting the limiting rod 708; the limiting rod 708 is inserted into the mounting cavity 1101 and passes through the top of the can lid 102. During microwave digestion, when the pressure inside the can 101 gradually increases, under the action of the pressure, the limiting rod 708 can be pushed upward along the insertion hole 703 and the mounting hole 701. At this time, the limiting rod is no longer limited. Block 702 and sealing plate 1104 are used to limit the pressure, ensuring that sealing plate 1104 can be pushed when the tank 101 is under high pressure, that is, pressing plate 202 can be pressed down. Furthermore, the pressure inside the tank 101 can be detected by observing the scale mark 709. When the high-pressure gas inside the tank 101 is gradually discharged and the pressure inside the tank 101 gradually drops to the normal pressure, the limiting rod 708 can move down and reset under the action of the reset mechanism, and insert into the insertion hole 703 along the mounting hole 701. At this time, sealing plate 1104 can be limited, so that sealing plate 1104 cannot be pushed, that is, pressing plate 202 cannot be pressed down. This can be identified by the operator, so that it can be determined whether the pressure inside the tank 101 is normal, making it more convenient and faster to use.

[0035] The reset mechanism includes a ring 802 fixed to the limiting rod 708, an L-shaped block 801 sleeved on the side wall of the limiting rod 708 and fixed to the bottom of the mounting cavity 1101, and a third spring 803 connected between the L-shaped block 801 and the ring 802. The third spring 803 is sleeved on the outside of the limiting rod 708 and can reset the movement of the limiting rod 708. Furthermore, the pressure inside the tank 101 is fed back by the deformation of the third spring 803.

[0036] Working principle: During microwave digestion, unscrew the can lid 102, load the liquid sample and digestion solution into the can body 101, tighten the can lid 102 and shake well. Then, place it on the microwave digester turntable and start the equipment for digestion. After digestion is complete, remove the microwave digestion can from the microwave digester. At this time, the high-pressure gas in the can body 101 can enter the exhaust pipe 1103 through the through hole 1102. As the pressure in the can body 101 gradually increases, under the action of the pressure, it can push the limit rod 708 to move upward along the insertion hole 703 and the mounting hole 701. At the same time, the third spring 803 is compressed. At this time, the limit block 702 and the sealing plate 1104 are no longer limited. Furthermore, the pressure in the can body 101 can be detected by observing the scale mark 709.

[0037] When pressure reduction is required, press the pressing plate 202, and the sliding rod 201 will drive the first disc 209 to move downward along the fixed cover 203. At the same time, the first spring 205 is compressed, and the connecting rod 204 will drive the push plate 505 to move downward. Then, the spring telescopic rod 605 will drive the first moving rod 602 to move downward, causing the connecting rod 603 to rotate. The connecting block 604 will push the sealing plate 1104 to move along the guide rail 601, and it can move to the bottom of the through hole 1102 to seal the through hole 1102.

[0038] At the same time, when the first disc 209 moves downward along the fixed cover 203, it can compress the air in the air supply chamber. Simultaneously, the first one-way valve closes and the second one-way valve opens. At this time, the air in the air supply chamber can be compressed and enter the annular sleeve 901 through the air inlet pipe 207, and blown onto the exhaust pipe 1103 and the heat sink 902. Then, it is discharged through the air outlet pipe 208, which cools and depressurizes the high-pressure gas in the exhaust pipe 1103 and can condense it.

[0039] After cooling, condensate will remain on the inner wall of the exhaust pipe 1103. As the first disc 209 and the push plate 505 continue to move downward, the spring telescopic rod 605 will be gradually compressed. When the push plate 505 abuts against the upper end of the push rod 504, the piston 1105 will move downward via the second moving rod 501. At the same time, the fixed ring 502 will move downward, and the second spring 503 will be compressed. When the piston 1105 disengages from the top plate 1108, the gas in the exhaust pipe 1103 can flow through the round hole 1106 to the top of the piston 1105 and be discharged through the discharge pipe 1107. Meanwhile, as the piston 1105 moves downward, the condensate on the inner wall of the exhaust pipe 1103 can be scraped and cleaned and collected on the sealing plate 1104.

[0040] When the pressing plate 202 is released, the first disc 209 can move upward and reset under the action of the first spring 205, and drive the push plate 505 to gradually move upward and reset through the connecting rod 204. At this time, the spring telescopic rod 605 gradually resets, the first moving rod 602 remains stationary, that is, the sealing plate 1104 remains stationary. At the same time, the piston 1105 can move upward under the action of the second spring 503. When discharging, the gas discharged from the exhaust pipe 208 and the exhaust pipe 1107 can be mixed in the mixing hood 1001 and discharged through the exhaust hole 1002, which can play a secondary cooling effect, making the discharge safer and more reliable.

[0041] When piston 1105 is in contact with top plate 1108, it can seal the discharge pipe 1107. Furthermore, push plate 505 disengages from push rod 504. As push plate 505 continues to move upward, spring telescopic rod 605 resets. At this point, spring telescopic rod 605 drives first moving rod 602 upward, and through connecting rod 603 and connecting block 604, pulls sealing plate 1104 away from the bottom of through hole 1102, ensuring through hole 1102 is open. At this time, high-pressure gas inside tank 101 can continue to pass through... The through-hole 1102 leads into the exhaust pipe 1103. After filling is complete, as the sealing plate 1104 continues to move, the condensed liquid collected on the top of the sealing plate 1104 can be scraped off and fall back into the tank 101, preventing the liquid from being carried out by the airflow and ensuring the accuracy of the test results. By repeating this process, the high-pressure gas in the tank 101 can be discharged in a fixed volume. Furthermore, during discharge, the tank 101 can be sealed to prevent the liquid in the tank 101 from being carried out by the airflow due to excessively fast depressurization, ensuring the accuracy of subsequent tests and making the process safer and more reliable.

[0042] At the same time, when the first disc 209 moves upward along the fixed cover 203, a negative pressure is generated inside the fixed cover 203. Simultaneously, the first one-way valve opens and the second one-way valve closes, allowing external air to enter the mounting cavity 1101 through the vent 210 and then enter the air supply chamber through the suction pipe 206. By repeatedly pressing the pressing disc 202, external air can be supplied into the air intake pipe 207 and enter the air flow channel through the air intake pipe 207 to cool and depressurize the high-pressure gas in the exhaust pipe 1103, making it more convenient and faster to use.

[0043] As the high-pressure gas inside the tank 101 is gradually discharged, the pressure inside the tank 101 gradually decreases to the normal pressure. At this time, the limit rod 708 can move downward and reset under the action of the reset mechanism, and insert into the insertion hole 703 along the mounting hole 701. At this time, the sealing plate 1104 can be limited, so that the sealing plate 1104 cannot be pushed, that is, the pressing plate 202 cannot be pressed down. This can be identified by the operator, so it can be determined whether the pressure inside the tank 101 is normal, making it more convenient and faster to use.

[0044] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0045] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A microwave digestion tank with a rapid pressure relief structure, comprising a digestion tank body; the digestion tank body comprises a tank body (101), a tank cover (102) in sealed connection with the tank body (101), and a sealed cavity between the tank body (101) and the tank cover (102); characterized in that: The tank cover (102) has a through hole (1102) communicating with the sealed cavity and a gas-liquid separation device arranged on the through hole (1102); The gas-liquid separation device comprises an exhaust pipe (1103) communicating with the through hole (1102) and an annular sleeve (901) sleeved outside the exhaust pipe (1103); the exhaust pipe (1103) and the annular sleeve (901) are connected to form an air flow channel; the gas-liquid separation device further comprises a cooling fin (902) connected with the exhaust pipe (1103) and arranged in the air flow channel, an air inlet pipe (207) and an air outlet pipe (208) communicating with the air flow channel; The tank cover (102) further comprises an adjusting device for adjusting the flow rate of the exhaust gas; the adjusting device comprises a sealing plate (1104) slidingly connected to the bottom of the through hole (1102) and a first pushing mechanism for pushing the sealing plate (1104) to move; the adjusting device further comprises a top plate (1108) fixed to the top of the exhaust pipe (1103), a piston (1105) slidingly arranged in the exhaust pipe (1103) and movably sealing the exhaust pipe (1107), and a second pushing mechanism for pushing the piston (1105) to move; the adjusting device further comprises a driving mechanism for driving the first pushing mechanism and the second pushing mechanism to move in sequence; the driving mechanism comprises a second disc (211) fixedly connected to the tank cover (102), a sliding rod (201) connected to the second disc (211), and a pushing plate (505) connected to the sliding rod (201); the sliding rod (201) comprises a connecting rod (204) slidingly connected to the second disc (211), and the connecting rod (204) penetrates the second disc (211) and is fixedly connected to the pushing plate (505); the adjusting device further comprises a first disc (209) fixedly connected to the connecting rod (204) and a first spring (205) abutting between the first disc (209) and the second disc (211), the first spring (205) being sleeved outside the connecting rod (204); the sliding rod (201) further comprises a pressing disc (202) fixedly connected to the upper end of the sliding rod (201); the adjusting device further comprises a spring telescopic rod (605) connected between the first moving rod (602) and the pushing plate (505); the adjusting device further comprises a mounting cavity (1101) arranged in the tank cover (102), the driving mechanism being located at the upper part of the mounting cavity (1101), and the adjusting device being located at the lower part of the mounting cavity (1101).

2. The microwave digestion vessel with a rapid pressure relief structure according to claim 1, characterized in that: The cooling fin (902) is arranged in a spiral manner and divides the air flow channel into a spiral flow channel, the lower part of the spiral flow channel communicating with the air inlet pipe (207), and the upper part of the spiral flow channel communicating with the air outlet pipe (208).

3. The microwave digestion vessel with a fast pressure relief structure according to claim 2, characterized in that: The adjusting device further comprises a plurality of round holes (1106) opened at the bottom of the piston (1105) and a discharge pipe (1107) communicated with the top of the exhaust pipe (1103); the adjusting device further comprises a mixing cover (1001) connected with the tank cover (102) and a plurality of exhaust holes (1002) opened on the mixing cover (1001); the gas outlet ends of the gas outlet pipe (208) and the discharge pipe (1107) are communicated with the mixing cover (1001).

4. The microwave digestion vessel with a fast pressure relief structure according to claim 3, characterized in that: The first pushing mechanism comprises a first moving rod (602) sliding on the tank cover (102), a connecting block (604) fixed to the side wall of the sealing plate (1104), and a connecting rod (603) rotating between the lower end of the first moving rod (602) and the connecting block (604); the first pushing mechanism further comprises a guide rail (601) fixed to the bottom of the tank cover (102), so that the sealing plate (1104) can slide on the guide rail (601).

5. The microwave digestion vessel with a fast pressure relief structure according to claim 4, characterized in that: The second pushing mechanism comprises a pushing rod (504) connected with the piston (1105); the pushing rod (504) comprises a second moving rod (501) slidingly connected with the top plate (1108); the second moving rod (501) penetrates the top plate (1108) and is fixed with the piston (1105); the second pushing mechanism further comprises a fixed ring (502) connected with the second moving rod (501) and a second spring (503) connected between the fixed ring (502) and the top plate (1108); the second spring (503) is sleeved outside the second moving rod (501).

6. The microwave digestion vessel with a fast pressure relief structure according to claim 1, characterized in that: The gas-liquid separation device further comprises a gas supply mechanism for supplying gas to the air inlet pipe (207); the gas supply mechanism comprises a fixed cover (203) sleeved outside the second disc (211) and the first disc (209); the fixed cover (203) is fixed with the second disc (211); a gas supply chamber is formed between the first disc (209), the second disc (211) and the fixed cover (203); the upper end of the air inlet pipe (207) is communicated with the gas supply chamber; the gas supply mechanism further comprises an air exhaust pipe (206) communicated with the gas supply chamber and a ventilation hole (210) communicated with the installation cavity (1101); the gas-liquid separation device further comprises a first one-way valve arranged in the air exhaust pipe (206) and a second one-way valve arranged in the air inlet pipe (207).

7. The microwave digestion vessel with a fast pressure relief structure according to claim 3, characterized in that: The adjusting device further comprises a self-locking mechanism for self-locking and limiting the sealing plate (1104); the self-locking mechanism comprises a mounting hole (701) opened at the bottom of the tank cover (102), a limiting block (702) fixed to the side wall of the connecting block (604), and a jack (703) opened at the top of the limiting block (702); the self-locking mechanism further comprises a limiting rod (708) inserted into the mounting hole (701), a scale mark (709) arranged on the limiting rod (708), and a reset mechanism for resetting the limiting rod (708); the limiting rod (708) is inserted into the installation cavity (1101) and penetrates the top of the tank cover (102).

8. The microwave digestion vessel with a fast pressure relief structure according to claim 7, characterized in that: The reset mechanism comprises a circular ring (802) fixed with the limiting rod (708), an L-shaped block (801) sleeved with the side wall of the limiting rod (708) and fixed with the bottom of the mounting cavity (1101), and a third spring (803) connected between the L-shaped block (801) and the circular ring (802); the third spring (803) is sleeved outside the limiting rod (708).

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