An environmentally friendly microwave digestion vessel frame

Abstract

This utility model discloses an environmentally friendly microwave digestion vessel frame, relating to the field of digestion instrument technology. The frame includes a frame body and several digestion vessels with top openings mounted on the frame body. Each digestion vessel has a sealed cap at its top, and each cap has a pipe communicating with the interior of the digestion vessel. The frame body is equipped with a pressure relief mechanism integrating sealing and pressure holding, overpressure relief, and stable pressure control. The end of each pipe furthest from the sealed cap is connected to the pressure relief mechanism. By installing a pressure relief mechanism on the frame body, which integrates pressure holding, overpressure relief, and stable pressure control, real-time pressure relief and control are achieved, solving the problem of experimental interruption due to pressure relief during digestion without the need for additional external components.

Description

Technical Field

[0001] This utility model relates to the field of digestion instrument technology, and more specifically, to an environmentally friendly microwave digestion vessel frame. Background Technology

[0002] As a core component of sample pretreatment, the microwave digestion vessel frame widely supports trace element detection in fields such as soil analysis, food safety, and pharmaceutical testing. Its core function is to withstand high temperatures of 180-300℃ and high pressures of 100-199 bar, and to achieve sealed positioning and pressure transmission of the digestion vessel.

[0003] Combined tank frame: often adopts the design of "inner fluoroplastic + middle reinforcement structure + outer sheath", such as the gradient material frame of the Antonpah system: inner PTFE-TFM, middle carbon fiber composite material, and outer PEEK. This type is more expensive.

[0004] Integrated tank frame: Made of a single TFM fluoroplastic, it is highly corrosion-resistant, but also heavy and extremely expensive. Commonly used reinforcing materials for the frame include ceramic-based carbon fiber, PEEK, and composite fibers, to balance pressure resistance and lightweight requirements.

[0005] The self-releasing pressure microwave digestion vessel frame is a core component of the microwave digestion system that combines "high pressure bearing" and "active pressure regulation." It mainly serves fields such as soil heavy metal detection, food additive analysis, and pharmaceutical trace impurity screening. In these scenarios, samples (such as soil containing volatile organic compounds and high-protein foods) are prone to rapid high pressure (peak values ​​can reach 150-220 bar) under microwave heating, and the frame is needed to achieve a dynamic balance of "sealing and maintaining pressure - overpressure relief - stable pressure control."

[0006] The core materials of the current framework are still mainly high-pressure and high-temperature resistant materials, such as inner TFM fluoroplastic (resistant to 300℃), middle carbon fiber composite material (compressive strength ≥800MPa), and outer PEEK engineering plastic (resistant to chemical corrosion). However, pressure regulation structures generally have limitations such as "pressure relief depends on external components" and "experiment interruption after pressure relief". Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an environmentally friendly microwave digestion tank frame.

[0008] The objective of this utility model is achieved through the following technical solution: An environmentally friendly microwave digestion vessel frame includes a frame and several digestion vessels with top openings disposed on the frame. The top of any of the digestion vessels is sealed with a sealing cap, and any of the sealing caps is provided with a pipe communicating with the interior of the digestion vessel. The frame is provided with a pressure relief mechanism that integrates sealing and pressure holding, overpressure relief, and stable pressure control. The end of any of the pipes away from the sealing caps is connected to the pressure relief mechanism.

[0009] Furthermore, in this utility model, the pressure relief mechanism includes a limiting plate disposed on the frame, a collection tank disposed on the limiting plate, and a sealing mechanism disposed inside the collection tank. The limiting plate and the collection tank together form a collection cavity. The limiting plate has a plurality of through holes that are all connected to the collection cavity. The ends of the plurality of pipes away from the plurality of sealing caps are connected to the plurality of through holes one by one. When no pressure is being released, the sealing mechanism seals the plurality of through holes.

[0010] Furthermore, in this utility model, the sealing mechanism includes a partition plate sealed inside the collection tank, a plurality of springs spaced apart on the partition plate, and a sealing disc connected to the plurality of springs. The plurality of springs cause the sealing disc to abut against the limiting disc, thereby blocking all the through holes simultaneously.

[0011] Furthermore, in this invention, there is a gap between the outer peripheral side of the sealing disc and the inner wall of the collection cavity.

[0012] Furthermore, in this utility model, the partition divides the collection chamber into an upper collection chamber and a lower collection chamber, and the sealing disc is located in the upper collection chamber; the partition is provided with an exhaust hole that connects the upper collection chamber and the lower collection chamber, and a one-way valve is provided in the exhaust hole, which allows gas to flow only from the upper collection chamber to the lower collection chamber.

[0013] The beneficial effects of this utility model are: This utility model provides an environmentally friendly microwave digestion vessel frame. By installing a pressure relief mechanism on the frame, it integrates pressure holding, overpressure relief, and stable pressure control, realizing real-time pressure relief and control. It solves the problem of experimental interruption caused by pressure relief during the digestion process without adding external components. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 for Figure 2 A sectional view; Figure 3 This is a schematic diagram of the pressure relief mechanism according to an embodiment of the utility model.

[0015] In the diagram: 101-Frame; 201-Digestion tank; 301-Sealing cover; 401-Pipe; 501-Limiting plate; 502-Collection tank; 503-Through hole; 504-Baffle plate; 505-Spring; 506-Sealing plate; 601-Upper collection chamber; 602-Lower collection chamber; 701-Exhaust port; 801-Check valve. Detailed Implementation

[0016] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] Please see Figure 1-3 This utility model provides a technical solution: An environmentally friendly microwave digestion vessel frame includes a frame 101 and several digestion vessels 201 with top openings mounted on the frame 101. Each digestion vessel 201 has a sealing cap 301 at its top, and a pipe 401 communicating with the interior of the digestion vessel 201 is installed on the sealing cap 301. The frame 101 also has a pressure relief mechanism integrating sealing and pressure holding, overpressure relief, and stable pressure control. The end of the pipe 401 furthest from the sealing cap 301 is connected to the pressure relief mechanism. To ensure smooth communication between the pipe 401 and the interior of the digestion vessel 201, an exhaust channel (not shown in the figure) is provided inside the sealing cap 301 in this embodiment. One end of the exhaust channel communicates with the interior of the digestion vessel 201, and the other end communicates with the pipe 401.

[0018] The collection container 502 serves two purposes: firstly, it collects the acid gas generated during digestion to prevent leakage and corrosion of the instrument; secondly, the gas generated at high temperatures during digestion is collected in the collection container 502, and after cooling to room temperature, this gas turns into a liquid, which is then used for subsequent chemical analysis.

[0019] Specifically, refer to Figure 2 or Figure 3 In this embodiment, the pressure relief mechanism includes a limiting plate 501 mounted on the frame 101, a collection tank 502 mounted on the limiting plate 501, and a sealing mechanism installed inside the collection tank 502. The limiting plate 501 and the collection tank 502 enclose a collection cavity for collecting liquid or gas. The limiting plate 501 has a plurality of through holes 503 that are all connected to the collection cavity. The number of through holes 503 is the same as the number of pipes 401. The ends of the plurality of pipes 401 that are away from the plurality of sealing caps 301 are connected to the plurality of through holes 503 one by one. When the pressure is not being relieved, the sealing mechanism seals the plurality of through holes 503.

[0020] Specifically, refer to Figure 2 or Figure 3 In this embodiment, the sealing mechanism includes a partition 504 sealed and installed inside the collection tank 502, a plurality of springs 505 spaced apart on the partition 504, and a sealing disc 506 connected to the plurality of springs 505. The plurality of springs 505 cause the sealing disc 506 to abut against the limiting disc 501, thereby simultaneously blocking all through holes 503. The plurality of springs 505 are arranged in a circumferential array about the central axis of the sealing disc 506.

[0021] During the digestion process, when one of the digestion vessels 201 becomes overpressurized, in order to facilitate timely pressure relief of the overpressurized digestion vessel 201, the dimensions of the sealing disc 506 in this embodiment are specifically designed such that the diameter of the sealing disc 506 is smaller than the inner diameter of the collection vessel 502, that is, there is a gap between the outer periphery of the sealing disc 506 and the inner wall of the collection chamber. Thus, when one of the digestion vessels 201 becomes overpressurized, the pressure of the gas in the corresponding pipe 401 will increase. This pressure, after passing through the corresponding through hole 503, will act on the sealing disc 506, causing the sealing disc 506 to tilt to one side, thereby opening the corresponding through hole 503. At this time, the gas pressure will be discharged into the collection chamber.

[0022] from Figure 2 or Figure 3 From the perspective of [the source], when the pressure is released, the air pressure in pipe 401 causes the sealing disc 506 to move downwards. The downward movement of the sealing disc 506 compresses the gas in the collection chamber. Because the compression process hinders the downward movement of the sealing disc 506 to some extent, and given the presence of several springs 505, the downward movement of the sealing disc 506 requires overcoming significant resistance, allowing the gas or liquid in pipe 401 to enter the collection chamber. To reduce the resistance to the downward movement of the sealing disc 506 during pressure release, in this embodiment, a partition 504 divides the collection chamber into an upper collection chamber 601 and a lower collection chamber 602, with the sealing disc 506 located in the upper collection chamber 601. The partition 504 has an exhaust port 701 connecting the upper and lower collection chambers 601, and a one-way valve 801 is installed in the exhaust port 701. The one-way valve 801 ensures that gas can only flow from the upper collection chamber 601 to the lower collection chamber 602. In this way, as the sealing disc 506 moves downward, the gas in the upper collection chamber 601 can enter the lower collection chamber 602 through the exhaust port 701 and the one-way valve 801 in sequence, thereby reducing the resistance to the downward movement of the sealing disc 506.

[0023] Working principle: from Figure 2 or Figure 3From the perspective of digestion, during the digestion process, as the pressure inside the digestion tank 201 gradually increases from atmospheric pressure, the gradually increasing pressure will cause the sealing disc 506 to tend to move downward. However, during this process, since the pressure has not yet reached the pressure relief value, the pressure acting on the sealing disc 506 is insufficient to overcome the resistance of several springs 505. The several springs 505 thus ensure that the sealing disc 506 always blocks each through hole 503, thereby maintaining pressure.

[0024] When the digestion tank 201 is under overpressure, the downward pressure on the sealing disc 506 is greater than the resistance to moving downward in the vertical direction. At this time, the sealing disc 506 will overcome the resistance and move downward, thereby opening the through hole 503. The liquid or gas discharged from the pipe 401 will be stored in the upper collection chamber 601.

[0025] After the pressure relief is completed, the pressure inside the digestion tank 201 is less than the pressure relief value. At this time, several springs 505 cause the sealing disc 506 to block the through hole 503 again, thereby maintaining pressure.

[0026] When the pressure in the upper collecting chamber 601 is too high, the sealing disc 506 will have difficulty moving downward. If the pressure in the upper collecting chamber 601 reaches the trigger value of the check valve 801, the pressure in the upper collecting chamber 601 can be released to the lower collecting chamber 602 through the check valve 801.

[0027] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. An environmentally friendly microwave digestion vessel frame, comprising a frame (101) and a plurality of digestion vessels (201) with top openings disposed on the frame (101), wherein the top of any digestion vessel (201) is sealed with a sealing cap (301), and any sealing cap (301) is provided with a pipe (401) communicating with the interior of the digestion vessel (201); characterized in that: The frame (101) is equipped with a pressure relief mechanism that integrates sealing and pressure holding, overpressure relief and stable pressure control. The end of any pipe (401) away from the sealing cover (301) is connected to the pressure relief mechanism.

2. The environmentally friendly microwave digestion vessel frame according to claim 1, characterized in that: The pressure relief mechanism includes a limiting plate (501) on the frame (101), a collection tank (502) on the limiting plate (501), and a sealing mechanism inside the collection tank (502). The limiting plate (501) and the collection tank (502) enclose a collection cavity. The limiting plate (501) has several through holes (503) that are all connected to the collection cavity. The ends of several pipes (401) away from several sealing caps (301) are connected to several through holes (503) respectively. When the pressure is not being relieved, the sealing mechanism seals several through holes (503).

3. The environmentally friendly microwave digestion vessel frame according to claim 2, characterized in that: The sealing mechanism includes a partition (504) sealed inside the collection tank (502), a plurality of springs (505) spaced apart on the partition (504), and a sealing disc (506) connected to the plurality of springs (505). The plurality of springs (505) cause the sealing disc (506) to abut against the limiting disc (501) to block all the through holes (503) at the same time.

4. The environmentally friendly microwave digestion vessel frame according to claim 3, characterized in that: There is a gap between the outer periphery of the sealing disc (506) and the inner wall of the collecting cavity.

5. The environmentally friendly microwave digestion vessel frame according to claim 3 or 4, characterized in that: The partition (504) divides the collection chamber into an upper collection chamber (601) and a lower collection chamber (602), and the sealing disc (506) is located in the upper collection chamber (601). The partition (504) is provided with an exhaust hole (701) that connects the upper collection chamber (601) and the lower collection chamber (602). A one-way valve (801) is provided in the exhaust hole (701), and the one-way valve (801) allows gas to flow only from the upper collection chamber (601) to the lower collection chamber (602).

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