A pipe sleeve structure for high-pressure digestion pipe pressure bearing

Abstract

The utility model discloses a pipe sleeve structure for high pressure digestion pipe pressure bearing, including the pressure bearing pipe sleeve for placing digestion pipe, the bottom pressure bearing block is fixedly arranged in the inside bottom of pressure bearing pipe sleeve, the inside surface of pressure bearing pipe sleeve is equipped with the spiral air current circulation groove, the top of air current circulation groove communicates with compressed air outlet pipe, and the bottom of air current circulation groove communicates with compressed air inlet pipe, and the end of compressed air outlet pipe and compressed air inlet pipe all passes the outside surface of pressure bearing pipe sleeve, and compressed air inlet pipe is connected with external compressed air conveying equipment. While bearing the pressure of digestion pipe cylindrical surface and bottom end face, playing the safe explosion -proof effect, integrated forced air cooling channel has realized to the in -situ rapid cooling of single digestion pipe, makes the function of pressure bearing pipe sleeve more abundant.

Description

Technical Field

[0001] This utility model relates to the field of heavy metal soil digestion technology, specifically a pipe sleeve structure for high-pressure digestion pipe pressure bearing. Background Technology

[0002] In heavy metal testing of soil, food, and other samples, high-temperature, high-pressure digestion is a crucial pretreatment step. During this process, the digestion tubing must withstand extremely high internal pressure, posing a risk of rupture and endangering operator safety. Therefore, equipping the digestion tubing with a pressure-bearing sleeve is a common safety measure. Traditional pressure-bearing sleeves have a single function, serving only as a mechanical protective shell, with their design focusing on wall thickness and material strength to withstand pressure.

[0003] After the digestion reaction is complete, the sample is usually still at a high temperature, requiring a long period of natural cooling before subsequent operations can be performed, which affects the efficiency of the entire testing process. Although some external cooling devices or methods exist, they often require removing the digestion tube from the pressure-bearing sleeve before transferring it for cooling, which is cumbersome and cannot achieve immediate in-situ cooling. To address this, we propose a sleeve structure for pressure-bearing high-pressure digestion tubes. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a sleeve structure for bearing pressure on high-pressure digestion tubes. While bearing the pressure on the cylindrical surface and bottom end face of the digestion tube and playing a safety and explosion-proof role, it integrates a forced air cooling channel to realize in-situ rapid cooling of individual digestion tubes, making the function of the pressure-bearing sleeve more comprehensive and effectively solving the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sleeve structure for bearing pressure in a high-pressure digestion tube, comprising a pressure-bearing sleeve for placing the digestion tube, wherein a bottom pressure-bearing block is fixedly provided at the bottom of the inner side of the pressure-bearing sleeve, and a spiral airflow circulation groove is formed on the inner surface of the pressure-bearing sleeve, wherein the top end of the airflow circulation groove is connected to a compressed air outlet pipe, and the bottom end of the airflow circulation groove is connected to a compressed air inlet pipe, wherein the ends of the compressed air outlet pipe and the compressed air inlet pipe both extend through the outer surface of the pressure-bearing sleeve, and the compressed air inlet pipe is connected to an external compressed air conveying device.

[0006] As a preferred technical solution of this utility model, an annular sealing groove is provided on the outer surface of the bottom pressure block, and a bottom sealing ring is provided in the sealing groove.

[0007] As a preferred technical solution of this utility model, the top surface of the pressure-bearing sleeve is provided with an annular sealing groove, and a top sealing ring is provided in the sealing groove.

[0008] As a preferred technical solution of this utility model, a cavity is provided between the inner wall and the outer wall of the pressure-bearing sleeve, and a phase change material filling layer is provided in the cavity.

[0009] As a preferred embodiment of this utility model, a spiral coolant circulation pipe is provided inside the cavity. A coolant inlet pipe and a coolant return pipe are respectively provided at the top and bottom of the coolant circulation pipe. Both the coolant inlet pipe and the coolant return pipe extend out of the outer surface of the pressure-bearing sleeve and are respectively connected to the outlet pipe and inlet pipe of the external coolant circulation equipment.

[0010] Compared with existing technologies, the advantages of this invention are as follows: while bearing the pressure on the cylindrical surface and bottom end face of the digestion tube and providing safety and explosion protection, it integrates a forced air cooling channel, achieving in-situ rapid cooling of a single digestion tube and enriching the function of the pressure-bearing sleeve. A spiral airflow circulation groove is directly opened inside the pressure-bearing sleeve, and a closed spiral air passage is formed by pressing the outer wall of the digestion tube itself, greatly increasing the contact area and extending the contact time between the cooling air and the digestion tube wall, resulting in a cooling efficiency higher than traditional direct-blowing cooling methods. Furthermore, this structure does not require changes to the overall layout of existing digestion equipment and can directly replace traditional sleeves. Without significantly increasing space or cost, it provides rapid cooling capabilities to a single pressure-bearing sleeve, effectively shortening the testing cycle. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a partial cross-sectional structural diagram of the present invention;

[0013] Figure 3 This is a schematic diagram of the cross-sectional side view of the present invention;

[0014] Figure 4 This is a schematic diagram showing the usage state of this utility model after the digestion tube is installed.

[0015] In the diagram: 1. Pressure-bearing pipe sleeve, 2. Cavity, 3. Phase change material filling layer, 4. Coolant circulation pipe, 5. Coolant inlet pipe, 6. Coolant return pipe, 7. Bottom pressure-bearing block, 8. Bottom sealing ring, 9. Top sealing ring, 10. Compressed air outlet pipe, 11. Compressed air inlet pipe, 12. Airflow circulation groove. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-4 This utility model provides a technical solution: a sleeve structure for bearing pressure on a high-pressure digestion tube, including a pressure-bearing sleeve 1 for placing the digestion tube, the pressure-bearing sleeve 1 bearing the pressure on the cylindrical surface of the digestion tube. A bottom pressure-bearing block 7 is fixedly installed at the bottom inner side of the pressure-bearing sleeve 1, the bottom pressure-bearing block 7 bearing the pressure on the bottom end face of the digestion tube, working with the pressure-bearing sleeve 1 to provide safety and explosion protection for the digestion tube. A spiral-shaped airflow circulation groove 12 is formed on the inner surface of the pressure-bearing sleeve 1 for passing clean compressed air. The spiral-shaped airflow circulation groove 12 increases the contact area of ​​the cold air on the digestion tube side, enhancing the cooling effect of the digestion tube. After the digestion tube is placed inside the pressure-bearing sleeve 1, the inner wall of the pressure-bearing sleeve 1 is tightly squeezed, so that the spiral airflow circulation groove 12 can form a closed spiral air passage, thereby allowing clean compressed air to cool the digestion tube along the spiral airflow circulation groove 12. It has multiple functions, serving both to provide pressure protection and explosion prevention for the digestion tube, and to cool the digestion tube, thus improving the efficiency of the testing work.

[0018] The top end of the airflow circulation tank 12 is connected to the compressed air outlet pipe 10, and the bottom end of the airflow circulation tank 12 is connected to the compressed air inlet pipe 11. The ends of both the compressed air outlet pipe 10 and the compressed air inlet pipe 11 extend through the outer surface of the pressure-bearing sleeve 1, and the compressed air inlet pipe 11 is connected to an external compressed air delivery device. Clean compressed air is delivered into the compressed air inlet pipe 11 through the external compressed air delivery device. The compressed air enters the airflow circulation tank 12 to cool the digestion tube, and then is discharged or recovered from the compressed air outlet pipe 10.

[0019] External compressed air delivery equipment uses commonly used equipment in existing technologies, which may include air compressors, drying equipment such as refrigerated dryers, filtration systems such as multi-stage precision filters, air tanks, air delivery pipelines, and valves.

[0020] In a preferred embodiment, an annular sealing groove is formed on the outer surface of the bottom pressure-bearing block 7, and a bottom sealing ring 8 is provided in the sealing groove. An annular sealing groove is formed on the top surface of the pressure-bearing sleeve 1, and a top sealing ring 9 is provided in the sealing groove. The top sealing ring 9 corresponds to the lower surface of the gripping part that contacts the top surface of the pressure-bearing sleeve 1 at the top of the digestion tube. The bottom sealing ring 8 and the top sealing ring 9 serve to seal the airflow in the airflow circulation groove 12 between the digestion tube and the pressure-bearing sleeve 1, ensuring the airtightness of the spiral air passage formed by the spiral groove of the outer wall of the digestion tube and the inner wall of the pressure-bearing sleeve, effectively preventing compressed air leakage, and ensuring that all cooling airflow circulates efficiently along the predetermined path, thereby improving the cooling efficiency of the digestion tube.

[0021] In a preferred embodiment, a cavity 2 is provided between the inner and outer walls of the pressure-bearing sleeve 1. A phase change material filling layer 3 is provided in the cavity 2. By filling the cavity of the pressure-bearing sleeve 1 with a phase change material (such as paraffin, hydrated salt, or eutectic salt), it absorbs and stores a large amount of heat during the digestion process. This not only provides additional passive heat absorption cooling in addition to active air cooling, significantly improving the cooling rate under peak heat load, but also effectively slows down the rapid temperature change of the digestion tube, enhancing its pressure-bearing stability and explosion-proof safety, thus forming a dual cooling guarantee.

[0022] In a further preferred embodiment, a spiral-shaped coolant circulation pipe 4 is installed within the cavity 2. The coolant circulation pipe 4 contacts the phase change material filling layer 3. A coolant inlet pipe 5 and a coolant return pipe 6 are respectively installed at the top and bottom of the coolant circulation pipe 4. Both the coolant inlet pipe 5 and the coolant return pipe 6 extend beyond the outer surface of the pressure-bearing sleeve 1 and are connected to the outlet and inlet pipes of an external coolant circulation device, respectively. The external coolant circulation system delivers coolant through the outlet pipe into the coolant inlet pipe 5, and then circulates within the coolant circulation pipe 4, cooling the heat-absorbing phase change material and increasing its subsequent cooling rate on the digestion tube, thereby further improving cooling efficiency.

[0023] An opening can be made on the digestion tube to connect sensor components such as pressure sensors and temperature sensors to monitor the internal pressure and temperature. Temperature monitoring can be used to coordinate with external coolant circulation equipment and external compressed air delivery equipment to control the liquid or gas flow rate, thereby controlling the cooling rate and automatically shutting off the coolant circulation equipment and external compressed air delivery equipment when the set temperature is reached.

[0024] External coolant circulation equipment uses common cooling equipment, which typically consists of a coolant tank, an outlet pump, a return pump, cooling devices such as thermoelectric coolers or cooling fans, and valves.

[0025] The external compressed air delivery equipment and external coolant circulation equipment used in this application are all existing field-use equipment. The pressure sensor, temperature sensor, liquid outlet pump, liquid return pump, thermoelectric cooler, cooling fan, air compressor, drying equipment, filtration system and valves used in the equipment are all commonly used electronic or non-electronic components in the prior art. Their specific structure, working principle, control method and circuit connection are all well-known technologies and will not be described in detail here.

[0026] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pipe sleeve structure for high-pressure digestion pipe pressure bearing, characterized in that: It includes a pressure-bearing sleeve (1) for placing the digestion tube. A bottom pressure-bearing block (7) is fixedly installed on the bottom inner side of the pressure-bearing sleeve (1). A spiral airflow circulation groove (12) is opened on the inner surface of the pressure-bearing sleeve (1). The top end of the airflow circulation groove (12) is connected to the compressed air outlet pipe (10), and the bottom end of the airflow circulation groove (12) is connected to the compressed air inlet pipe (11). The ends of the compressed air outlet pipe (10) and the compressed air inlet pipe (11) both extend out of the outer surface of the pressure-bearing sleeve (1), and the compressed air inlet pipe (11) is connected to an external compressed air conveying device.

2. The pipe sleeve structure for high-pressure digestion pipe pressure bearing according to claim 1, characterized in that: The outer surface of the bottom pressure block (7) is provided with an annular sealing groove, and a bottom sealing ring (8) is provided in the sealing groove.

3. The pipe sleeve structure for high-pressure digestion pipe pressure bearing according to claim 1, characterized in that: The top surface of the pressure-bearing sleeve (1) is provided with an annular sealing groove, and a top sealing ring (9) is provided in the sealing groove.

4. The pipe sleeve structure for high-pressure digestion pipe pressure bearing according to claim 1, characterized in that: A cavity (2) is provided between the inner wall and the outer wall of the pressure-bearing sleeve (1), and a phase change material filling layer (3) is provided in the cavity (2).

5. A pipe sleeve structure for high-pressure digestion pipe pressure bearing according to claim 4, characterized in that: The cavity (2) is provided with a spiral coolant circulation pipe (4). The top and bottom ends of the coolant circulation pipe (4) are respectively provided with a coolant inlet pipe (5) and a coolant return pipe (6). The coolant inlet pipe (5) and the coolant return pipe (6) both pass through the outer surface of the pressure-bearing sleeve (1) and are respectively connected to the outlet pipe and inlet pipe of the external coolant circulation equipment.

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