Sealing structure of digestion tank for soil heavy metal detection

Abstract

The utility model discloses a sealing structure of a digestion tank for soil heavy metal detection, which comprises an outer tank, a sealing cover, a sealing mechanism and a connecting mechanism, the sealing mechanism and the connecting mechanism are both mounted between the outer tank and the sealing cover, a gasket is sleeved on the outer wall of a connecting ring, a first sealing ring is fixedly arranged at the top of the gasket, and L-shaped buckles are fixedly arranged on two sides of the bottom of the gasket. Clamping grooves are formed in one sides of the inner walls of the two grooves; according to the sealing device, the sealing cover is screwed on the outer wall of the connecting ring, the connecting plug at the bottom of the sealing cover is synchronously in threaded connection with the inner tank in the outer tank, synchronous sealing of the inner tank and the outer tank is achieved, the first sealing ring is extruded along with screwing of the sealing cover to achieve sealing, and when the sealing cover is detached in the later period, under limiting of the L-shaped buckle and the clamping groove, the sealing cover can be conveniently detached. And when the first sealing ring needs to be replaced in the later period, the L-shaped buckle can be separated from the clamping groove by rotating the gasket, so that the first sealing ring is conveniently detached and replaced, and the overall use convenience of the digestion tank is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of digestion tank sealing, specifically a sealing structure for a digestion tank used for soil heavy metal testing. Background Technology

[0002] A digestion vessel is a type of digestion tube used for sample pretreatment and dissolution in chemical analysis methods such as gas chromatography, liquid chromatography, inductively coupled plasma mass spectrometry, and atomic absorption spectrometry. During the dissolution process, especially when detecting heavy metals in soil, certain gases may be generated, some of which may be harmful to humans. Therefore, a sealing structure at the top of the digestion vessel is essential. With the development of modern technology, the structure and function of digestion vessels are constantly being improved, including upgrades to the sealing structure.

[0003] However, existing digestion vessels typically use sealing structures that incorporate sealing rings, with continuous upgrades to the ring material. When these rings are fitted onto the outside of the vessel and connected to the lid for sealing, prolonged exposure and pressure can cause them to deteriorate rapidly, requiring regular replacement. Therefore, they cannot be fixed to the outside of the vessel and must slide on it. Consequently, each time the lid is opened, the sealing ring may stick to it due to the high temperature, requiring frequent removal by operators, which is inconvenient. Furthermore, the sealing connection of the digestion vessel requires tightening the inner lid first, followed by the outer lid, increasing the operational steps and reducing the ease of use. Therefore, this design proposes a sealing structure for a digestion vessel used for heavy metal testing in soil. Utility Model Content

[0004] The purpose of this invention is to provide a sealing structure for a digestion vessel used for heavy metal detection in soil, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model proposes a sealing structure for a digestion tank for heavy metal detection in soil, including an outer tank, a sealing cover, and a sealing mechanism and a connecting mechanism both installed between the outer tank and the sealing cover.

[0006] The sealing mechanism includes a connecting ring fixedly connected to the top edge of the outer tank. A gasket is fitted on the outer wall of the connecting ring. A first sealing ring is fixedly fitted on the top of the gasket. L-shaped buckles are fixedly fitted on both sides of the bottom of the gasket. Grooves are opened at the edges of both sides of the top of the outer tank. A slot is opened on one side of the inner wall of the two grooves.

[0007] The connecting mechanism includes an inner tank that is inserted into the inner wall of the outer tank. Limiting grooves are provided on both sides of the inner wall of the outer tank. Limiting blocks are fixedly provided at the upper edges of both sides of the outer wall of the inner tank. A sealing block is fixedly provided at the top of the inner wall of the sealing cover. A connecting plug is fixedly provided at the middle position of the bottom of the sealing block.

[0008] In one example, a second sealing ring is fixedly provided on the top of the inner wall of the sealing cap between the outer wall of the sealing block and the side wall of the sealing cap.

[0009] In one example, the outer walls of one end of the two L-shaped buckles respectively pass through the inner walls of the two grooves and are inserted into the inner walls of the two slots. The sealing cap is fitted on the outer wall of the connecting ring and presses against the top of the first sealing ring, and the bottom of the second sealing ring presses against the top of the connecting ring.

[0010] In one example, the outer wall of the connecting plug and the inner wall of the sealing cap are provided with a first threaded groove, and the upper edge of the inner wall of the inner can is provided with a second threaded groove.

[0011] In one example, the connecting plug is threadedly connected to the inner tank via a first threaded groove on its outer wall and a second threaded groove on the inner side of the inner tank.

[0012] In one example, the outer wall of the connecting ring has a third threaded groove, and the sealing cap is threadedly connected to the connecting ring through a first threaded groove located on its inner side and a third threaded groove on the outer wall of the connecting ring.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting a sealing mechanism and a connecting mechanism, when sealing the digestion vessel, the sealing cap is screwed onto the outer wall of the connecting ring, and the connecting plug at its bottom is simultaneously threaded into the inner vessel inside the outer vessel, achieving synchronous sealing of the inner and outer vessels. As the sealing cap is screwed on, the first sealing ring is squeezed, and the second sealing ring is also squeezed by the connecting ring to achieve sealing. When the sealing cap is removed later, the first sealing ring will not be pulled out along with it due to the limit of the L-shaped buckle and the slot. When the first sealing ring needs to be replaced later, rotating the washer will allow the L-shaped buckle to disengage from the slot, making it easy to remove and replace the first sealing ring. This solves the problems in actual use, such as the sealing ring on the outside of the vessel being easily pulled out when the lid is opened, requiring manual reset, and the inner and outer vessels not being able to be sealed synchronously, thus improving the overall convenience of using the digestion vessel. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the connection between the outer can and the first sealing ring of this utility model;

[0016] Figure 3Appendix to the specification of this utility model Figure 2 Enlarged structural diagram at point A;

[0017] Figure 4 This is a schematic diagram of the bottom structure of the washer of this utility model;

[0018] Figure 5 This is a schematic diagram of the internal structure of the outer and inner tanks of this utility model;

[0019] Figure 6 This is a schematic diagram of the cross-section of the sealing cap of this utility model.

[0020] In the diagram: 1. Outer tank; 2. Sealing cap; 3. Sealing mechanism; 301. Connecting ring; 302. Washer; 303. First sealing ring; 304. L-shaped buckle; 305. Groove; 306. Slot; 4. Connecting mechanism; 401. Inner tank; 402. Limiting groove; 403. Limiting block; 404. Sealing block; 405. Connecting plug; 406. Second sealing ring; 5. First threaded groove; 6. Second threaded groove; 7. Third threaded groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-6 This utility model provides a technical solution: a sealing structure for a digestion tank for soil heavy metal detection, including an outer tank 1, a sealing cover 2, and a sealing mechanism 3 and a connecting mechanism 4, both installed between the outer tank 1 and the sealing cover 2;

[0023] The sealing mechanism 3 includes a connecting ring 301 fixedly connected to the top edge of the outer tank 1. A gasket 302 is fitted on the outer wall of the connecting ring 301. A first sealing ring 303 is fixedly provided on the top of the gasket 302. L-shaped buckles 304 are fixedly provided on both sides of the bottom of the gasket 302. Grooves 305 are provided on both sides of the top edge of the outer tank 1. A slot 306 is provided on one side of the inner wall of the two grooves 305.

[0024] The connecting mechanism 4 includes an inner tank 401 that is inserted into the inner wall of the outer tank 1. Limiting grooves 402 are provided on both sides of the inner wall of the outer tank 1. Limiting blocks 403 are fixedly provided at the upper edges of both sides of the outer wall of the inner tank 401. A sealing block 404 is fixedly provided at the top of the inner wall of the sealing cover 2. A connecting plug 405 is fixedly provided at the middle position of the bottom of the sealing block 404.

[0025] In use, the sample to be dissolved is placed in the inner container 401, and then the inner container 401 is installed in the outer container 1. During installation, the limiting block 403 on the outside of the inner container 401 is aligned with the limiting grooves 402 on both sides of the inner wall of the outer container 1 and inserted into the inner container 401, so that it is limited in the outer container 1. Then, the sealing cap 2 is put on. During the process of putting on the sealing cap 2, the connecting plug 405 at the bottom of the sealing block 404 on the inner side of the sealing cap 2 is inserted into the inner container 401. The sealing cap 2 is rotated so that the sealing cap 2 and the connecting plug 405 are connected and fixed to both the outer container 1 and the inner container 401. During fixing, the bottom of the sealing cap 2 is squeezed against the first sealing ring 303 that is movably installed on the outer wall of the connecting ring 301, so that it deforms and fully contacts the sealing cap 2. At the same time, the gasket 302 at its bottom fully contacts the top of the outer container 1. The outer wall is sealed. When the sealing cap 2 is unscrewed later, the first sealing ring 303 will not be pulled out by the sealing cap 2 due to the locking limit between the L-shaped buckle 304 and the groove 306 on one side of the groove 305. No staff need to clean or reset it. When the first sealing ring 303 needs to be replaced later, rotate the washer 302 so that the outer wall of the L-shaped buckle 304 at the bottom is disengaged from the groove 306 and pulled out from the groove 305. The first sealing ring 303 and the washer 302 can then be pulled out together to replace the connecting ring 301. This makes the sealing structure of the digestion vessel not only easier to disassemble and replace during use, but also allows the inner tank 401 and the outer tank 1 to be connected synchronously during the sealing connection operation, improving the overall convenience of use of the digestion vessel. At the same time, it can also ensure that the gas generated when the digestion vessel is used to dissolve the components during the detection of heavy metals in the soil will not escape.

[0026] Furthermore, a second sealing ring 406 is fixedly provided on the top of the inner wall of the sealing cap 2 between the outer wall of the sealing block 404 and the side wall of the sealing cap 2. When the sealing cap 2 is installed, the sealing block 404 on its inner side is squeezed against the top of the outer tank 1 in the inner area of ​​the connecting ring 301 and is always in contact with the inner wall of the connecting ring 301. At the same time, the second sealing ring 406 on the top of the inner wall of the sealing cap 2 contacts the top of the connecting ring 301, further improving the sealing effect of the digestion tank.

[0027] Furthermore, the outer walls of one end of the two L-shaped buckles 304 pass through the inner walls of the two grooves 305 and are inserted into the inner walls of the two slots 306 respectively. The sealing cap 2 is fitted on the outer wall of the connecting ring 301 and presses against the top of the first sealing ring 303. The bottom of the second sealing ring 406 presses against the top of the connecting ring 301. When the washer 302 is fitted on the connecting ring 301, it slides down to contact the top of the outer can 1 and aligns the L-shaped buckle 304 at the bottom with the groove 305 and snaps in. Then, by rotating the washer 302, the L-shaped buckle 304 can be snapped into the slot 306, thereby fixing the washer 302 and preventing it from being taken out when the sealing cap 2 is unscrewed.

[0028] Furthermore, the outer wall of the connecting plug 405 and the inner wall of the sealing cap 2 are provided with a first threaded groove 5, and the upper edge of the inner wall of the inner tank 401 is provided with a second threaded groove 6, and the threads of the first threaded groove 5, the second threaded groove 6 and the third threaded groove 7 are consistent.

[0029] The connecting plug 405 is threadedly connected to the inner tank 401 through a first threaded groove 5 located on its outer wall and a second threaded groove 6 located on the inner side of the inner tank 401.

[0030] The outer wall of the connecting ring 301 is provided with a third threaded groove 7, and the sealing cap 2 is threadedly connected to the connecting ring 301 through the first threaded groove 5 located on its inner side and the third threaded groove 7 on the outer wall of the connecting ring 301. When the sealing cap 2 is screwed on, the first threaded groove 5 on its inner side is threadedly connected to the third threaded groove 7 on the outer side of the connecting ring 301. At the same time, the first threaded groove 5 on the outer side of the connecting plug 405 is also threadedly connected to the second threaded groove 6 on the inner side of the inner can 401. The inner can 401 is limited and locked by the limiting block 403 and the limiting groove 402, so that when the connecting plug 405 is screwed on to the inner can 401, the inner can 401 will not rotate. This ensures that while the sealing cap 2 is screwed on to the connecting ring 301, the connecting plug 405 can also be smoothly threaded to the inner can 401 through the first threaded groove 5 and the second threaded groove 6, without the need to separate and seal the outer can 1 and the inner can 401, thus improving the convenience of operation.

[0031] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so they are described more simply; relevant parts can be referred to the descriptions of the method embodiments.

[0032] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A sealing structure for a digestion vessel for heavy metal detection in soil, comprising an outer vessel (1), a sealing cover (2), and a sealing mechanism (3) and a connecting mechanism (4) both installed between the outer vessel (1) and the sealing cover (2). Its features are: The sealing mechanism (3) includes a connecting ring (301) fixedly connected to the top edge of the outer tank (1). A gasket (302) is fitted on the outer wall of the connecting ring (301). A first sealing ring (303) is fixedly provided on the top of the gasket (302). L-shaped buckles (304) are fixedly provided on both sides of the bottom of the gasket (302). Grooves (305) are provided on both sides of the top edge of the outer tank (1). A slot (306) is provided on one side of the inner wall of the two grooves (305). The connecting mechanism (4) includes an inner tank (401) that is inserted into the inner wall of the outer tank (1). Limiting grooves (402) are provided on both sides of the inner wall of the outer tank (1). Limiting blocks (403) are fixedly provided at the upper edges of both sides of the outer wall of the inner tank (401). A sealing block (404) is fixedly provided at the top of the inner wall of the sealing cover (2). A connecting plug (405) is fixedly provided at the middle position of the bottom of the sealing block (404).

2. The sealing structure of the digestion vessel for heavy metal detection in soil according to claim 1, characterized in that: The top of the inner wall of the sealing cover (2) is fixedly provided with a second sealing ring (406) between the outer wall of the sealing block (404) and the side wall of the sealing cover (2).

3. The sealing structure of the digestion vessel for heavy metal detection in soil according to claim 1, characterized in that: The outer walls of one end of the two L-shaped buckles (304) pass through the inner walls of the two grooves (305) and are inserted into the inner walls of the two slots (306). The sealing cover (2) is fitted on the outer wall of the connecting ring (301) and presses against the top of the first sealing ring (303), and the bottom of the second sealing ring (406) presses against the top of the connecting ring (301).

4. The sealing structure of the digestion vessel for heavy metal detection in soil according to claim 1, characterized in that: The outer wall of the connecting plug (405) and the inner wall of the sealing cap (2) are provided with a first threaded groove (5), and the upper edge of the inner wall of the inner tank (401) is provided with a second threaded groove (6).

5. The sealing structure of a digestion vessel for heavy metal detection in soil according to claim 4, characterized in that: The connecting plug (405) is threadedly connected to the inner tank (401) through a first threaded groove (5) located on its outer wall and a second threaded groove (6) inside the inner tank (401).

6. The sealing structure of the digestion vessel for heavy metal detection in soil according to claim 5, characterized in that: The outer wall of the connecting ring (301) is provided with a third threaded groove (7), and the sealing cover (2) is threadedly connected to the connecting ring (301) through the first threaded groove (5) located on its inner side and the third threaded groove (7) on the outer wall of the connecting ring (301).

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