Digestion tank of microwave digestion instrument

Abstract

The utility model discloses a digestion tank of a microwave digestion instrument in the technical field of digestion instruments, the digestion tank comprises a tank body, a pressure relief mechanism and a buffer mechanism, the tank body comprises an inner tank and an outer tank, the inner tank is mounted in the outer tank, a gap is reserved between the outer tank and the inner tank, a sealing ring is mounted between the top of the outer tank and the top of the inner tank, and the pressure relief mechanism is connected with the buffer mechanism. The gap is filled with buffering materials used for relieving impact force when the inner tank explodes, and the inner tank is detachably connected with a tank cover. The pressure relief mechanism is used for relieving pressure in the inner tank after the air pressure in the inner tank reaches a safety threshold value, so that the internal pressure of the inner tank is reduced, and the air pressure in the inner tank is continuously maintained within the safety pressure; the buffer mechanism wraps the tank wall of the outer tank, and when the inner tank explodes and breaks through the outer tank, the buffer mechanism absorbs impact force and diffused fragments. The scheme is used for reducing the possibility of damage caused by explosion of the digestion tank.

Description

Technical Field

[0001] The utility model relates to the technical field of digestion instruments, in particular to a digestion tank of a microwave digestion instrument. Background Art

[0002] Microwave digestion instrument is a laboratory equipment that uses microwave energy to digest samples. It is mainly used for sample pretreatment in the fields of chemistry, environment, food, geology, biomedicine, etc. By utilizing the penetration and selective heating principle of microwaves, the instrument can quickly generate a high temperature and high pressure environment in a closed digestion tank, so that samples (such as soil, food, biological tissue, wastewater samples, etc.) react strongly and efficiently with acidic reagents, thereby quickly dissolving and digesting organic or inorganic substances in the samples. However, during the microwave digestion process, the reaction between the sample and the strong acid may produce a large amount of gas. If the pressure in the digestion tank is too high and exceeds the pressure limit that the tank can withstand, an explosion may occur. Therefore, there is an urgent need for a digestion tank that can reduce explosion damage. Utility Model Content

[0003] The utility model aims to provide a digestion tank of a microwave digestion instrument, so as to reduce the possibility of damage caused by explosion of the digestion tank.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a digestion tank of a microwave digestion instrument, comprising a tank body, a pressure relief mechanism and a buffer mechanism, the tank body comprising an inner tank and an outer tank, the inner tank being installed in the outer tank, a gap being left between the outer tank and the inner tank, a sealing ring being installed between the top of the outer tank and the top of the inner tank, the gap being filled with a buffer material for alleviating the impact force when the inner tank explodes, and a tank cover being detachably connected to the inner tank;

[0005] The pressure relief mechanism is used to relieve the pressure inside the inner tank after the air pressure inside the inner tank reaches a safety threshold, thereby reducing the internal pressure of the inner tank and allowing the air pressure inside the inner tank to continue to be maintained within a safe pressure;

[0006] The buffer mechanism is wrapped on the tank wall of the outer tank, and when the inner tank explodes and breaks through the outer tank, the buffer mechanism absorbs the impact force and the diffused fragments.

[0007] Furthermore, the pressure relief mechanism includes a pressure relief pipe, the bottom of which passes through the tank cover and is connected to the interior of the inner tank. The bottom of the pressure relief pipe is in a constricted shape. A gravity ball is placed in the pressure relief pipe. The ball diameter of the gravity ball is smaller than the inner diameter of the pressure relief pipe and larger than the diameter of the bottom of the pressure relief pipe.

[0008] Furthermore, a cross bar is fixedly connected to the top of the pressure relief pipe, a vertical bar is fixedly connected to the middle of the cross bar, and the vertical bar is located in the pressure relief pipe and is coaxial with the central axis of the pressure relief pipe.

[0009] Furthermore, the buffer material is a buffer material made of ceramic fiber.

[0010] Furthermore, the buffer mechanism comprises a fixed net, a buffer plate is provided in each mesh of the fixed net, elastic ropes are fixedly connected to the four edges of the buffer plate, and one end of the elastic rope away from the buffer plate is fixedly connected to the fixed net.

[0011] Furthermore, the buffer plate comprises a hard plastic plate, and a foam plastic plate is fixedly connected to one side of the plastic plate facing the outer tank.

[0012] Beneficial effects of the utility model:

[0013] 1. With this solution, when the air pressure in the inner tank exceeds the safety threshold, the gas in the inner tank enters the pressure relief pipe, and then the air pressure is used to lift the gravity ball so that it is suspended in the pressure relief pipe. The air pressure in the inner tank is discharged through the pressure relief pipe to complete the pressure relief and avoid explosion due to excessive air pressure.

[0014] 2. Even if the inner tank explodes due to insufficient pressure relief in the pressure relief pipe, the gap between the inner tank and the outer tank is filled with a buffer material made of ceramic fiber to absorb the impact of the explosion, reduce the impact force generated by the explosion, and thus achieve the purpose of reducing damage.

[0015] 3. When the inner tank explodes and breaks through the outer tank, the impact force acts directly on the buffer plate. The buffer plate cooperates with the elasticity of the elastic rope to release the impact force. At the same time, the foam plastic plate of the buffer plate allows the fragments generated by the explosion to be inserted to avoid splashing everywhere, and the hard plastic plate can effectively prevent the fragments from passing through the foam plastic plate, thereby achieving the purpose of further reducing damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a digestion tank of a microwave digestion instrument of the utility model;

[0017] Figure 2 for Figure 1 A magnified view of middle;

[0018] Figure 3 for Figure 1 Schematic diagram of the structure of the fixed network. DETAILED DESCRIPTION

[0019] The following is further described in detail through specific implementation methods:

[0020] The reference numerals in the drawings of the specification include: tank cover 1, sealing ring 2, inner tank 3, cushioning material 4, outer tank 5, fixing net 6, foam plastic board 7, plastic board 8, cross bar 9, vertical bar 10, pressure relief pipe 11, gravity ball 12, elastic rope 13.

[0021] The embodiment is basically as shown in the attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown:

[0022] A digestion tank of a microwave digestion instrument comprises a tank body, a pressure relief mechanism and a buffer mechanism. The tank body comprises an inner tank 3 and an outer tank 5. The inner tank 3 is installed in the outer tank 5. A gap is left between the outer tank 5 and the inner tank 3. A sealing ring 2 is installed between the top of the outer tank 5 and the top of the inner tank 3. The gap is filled with a buffer material 4 for relieving the impact force when the inner tank 3 explodes. The buffer material 4 is made of ceramic fiber. A tank cover 1 is detachably connected to the inner tank 3.

[0023] The pressure relief mechanism is used to relieve the pressure inside the inner tank 3 after the air pressure inside the inner tank 3 reaches the safety threshold, reduce the internal pressure of the inner tank 3, and keep the air pressure inside the inner tank 3 within the safety pressure; the pressure relief mechanism includes a pressure relief pipe 11, the bottom of the pressure relief pipe 11 passes through the tank cover 1 and communicates with the inside of the inner tank 3, the bottom of the pressure relief pipe 11 is in a constricted shape, and a gravity ball 12 is placed in the pressure relief pipe 11, the ball diameter of the gravity ball 12 is smaller than the inner diameter of the pressure relief pipe 11 and larger than the diameter of the bottom of the pressure relief pipe 11. The top of the pressure relief pipe 11 is fixedly connected with a cross bar 9, and the middle of the cross bar 9 is fixedly connected with a vertical bar 10, which is located in the pressure relief pipe 11 and is coaxial with the central axis of the pressure relief pipe 11.

[0024] The buffer mechanism is wrapped on the tank wall of the outer tank 5. When the inner tank 3 explodes and breaks through the outer tank 5, the buffer mechanism absorbs the impact force and the diffused fragments. The buffer mechanism includes a fixed net 6. A buffer plate is provided in each mesh of the fixed net 6. Elastic ropes 13 are fixedly connected to the four edges of the buffer plate. The end of the elastic rope 13 away from the buffer plate is fixedly connected to the fixed net 6. The buffer plate includes a hard plastic plate 8. A foam plastic plate 7 is fixedly connected to the side of the plastic plate 8 facing the outer tank 5.

[0025] The specific implementation process is as follows:

[0026] Before use, the gravity ball 12 closes the cover at the bottom of the pressure relief pipe 11 under the action of gravity. During use, when the air pressure in the inner tank 3 is too high, the gas in the inner tank 3 enters the pressure relief pipe 11, and then the thrust of the air pressure pushes the gravity ball 12 to float in the pressure relief pipe 11. Since the ball diameter of the gravity ball 12 is smaller than the inner diameter of the pressure relief pipe 11, when the gravity ball 12 is suspended, the gas can be discharged through the pressure relief pipe 11, and a cross bar 9 is fixedly connected to the top of the pressure relief pipe 11, and a vertical rod 10 coaxial with the central axis of the pressure relief pipe 11 is fixed in the middle of the cross bar 9. The vertical rod 10 is in the pressure relief pipe 11, which will not affect the normal exhaust of the pressure relief pipe 11 and can prevent the gravity ball 12 from being blown out of the pressure relief pipe 11 due to excessive air pressure.

[0027] When the pressure relief pipe 11 is insufficient to relieve the pressure, and the inner tank 3 still explodes, the gap between the inner tank 3 and the outer tank 5 is filled with a buffer material 4 made of ceramic fiber, and the impact force generated by the explosion of the inner tank 3 is absorbed by the buffer material 4 to reduce its impact force. At the same time, the ceramic fiber can wrap the fragments generated by the explosion to reduce the possibility of splashing. If the fragments generated by the explosion pass through the ceramic fiber and the outer tank 5, the fragments will directly hit the buffer plate. Since the four edges of the buffer plate are fixedly connected with elastic ropes 13, and one end of the elastic rope 13 away from the buffer plate is fixedly connected to the fixed net 6, when the buffer plate is hit by the fragments, the fragments are immediately inserted into the foam plastic plate 7, and the hard plastic plate 8 prevents the fragments from rushing out of the foam plastic plate 7. At the same time, the buffer plate is hit and moves outward, and the buffer plate pulls the elastic rope 13 to stretch when it moves. When the impact force of the fragments is consumed, the buffer plate returns to its original position under the elastic force of the elastic rope 13, completing the release of the fragments or the impact force of the explosion.

Claims

1. A digestion tank of a microwave digestion instrument, characterized in that: It comprises a tank body, a pressure relief mechanism and a buffer mechanism, wherein the tank body comprises an inner tank and an outer tank, wherein the inner tank is installed in the outer tank, a gap is left between the outer tank and the inner tank, a sealing ring is installed between the top of the outer tank and the top of the inner tank, the gap is filled with a buffer material for alleviating the impact force when the inner tank explodes, and a tank cover is detachably connected to the inner tank; The pressure relief mechanism is used to relieve the pressure inside the inner tank after the air pressure inside the inner tank reaches a safety threshold, thereby reducing the internal pressure of the inner tank and allowing the air pressure inside the inner tank to continue to be maintained within a safe pressure; The buffer mechanism is wrapped on the tank wall of the outer tank, and when the inner tank explodes and breaks through the outer tank, the buffer mechanism absorbs the impact force and the diffused fragments.

2. The digestion tank of a microwave digestion instrument according to claim 1, characterized in that: The pressure relief mechanism includes a pressure relief pipe, the bottom of which passes through the tank cover and is connected to the interior of the inner tank. The bottom of the pressure relief pipe is in a constricted shape. A gravity ball is placed in the pressure relief pipe. The ball diameter of the gravity ball is smaller than the inner diameter of the pressure relief pipe and larger than the diameter of the bottom of the pressure relief pipe.

3. A digestion tank of a microwave digestion instrument according to claim 2, characterized in that: The top of the pressure relief pipe is fixedly connected with a cross bar, the middle of the cross bar is fixedly connected with a vertical bar, the vertical bar is located in the pressure relief pipe and is coaxial with the central axis of the pressure relief pipe.

4. A digestion tank for a microwave digestion instrument according to claim 3, characterized in that: The buffer material is a buffer material made of ceramic fiber.

5. The digestion tank of a microwave digestion instrument according to claim 4, characterized in that: The buffer mechanism comprises a fixed net, each mesh of the fixed net is provided with a buffer plate, four edges of the buffer plate are fixedly connected with elastic ropes, and one end of the elastic rope away from the buffer plate is fixedly connected to the fixed net.

6. The digestion tank of a microwave digestion instrument according to claim 5, characterized in that: The buffer plate comprises a hard plastic plate, and a foam plastic plate is fixedly connected to one side of the plastic plate facing the outer tank.

Images