Acid addition device and high-pressure vessel

Abstract

This application discloses an acid addition device and high-pressure vessel. The acid addition device includes an acid addition pipe, a connecting assembly, multiple abutment components, and a transmission assembly. One end of the acid addition pipe extends into the high-pressure vessel through an acid addition port, and the acid addition pipe is rotatably set along its own axis. The connecting assembly is located at the middle part of the acid addition pipe and is sealedly connected to the end surface of the acid addition port. Multiple abutment components are spaced along the circumference of the acid addition pipe and are movable in the radial direction of the acid addition pipe. When the abutment components move away from the acid addition pipe, they abut against the side wall of the acid addition port to fix the acid addition pipe. The transmission assembly connects the abutment components with the acid addition pipe, driving the abutment components to move radially along the acid addition pipe through the rotation of the acid addition pipe. This application uses the abutment components to abut against the side wall of the acid addition port, thereby fixing the part of the acid addition pipe that extends into the reaction vessel. This solves the problem of short service life of the acid addition pipe due to fatigue damage caused by shaking during the acid addition process.

Description

[0001] Description

[0002] ACID ADDITION DEVICE AND HIGH-PRESSURE VESSEL

[0003] FILED OF DISCLOSURE

[0004] This application relates to the technical field of laterite nickel ore processing equipment, specifically to an acid addition device and high-pressure vessel.

[0005] BACKGROUND

[0006] In the current hydrometallurgical process of laterite nickel ore, slurry, sulfuric acid, and steam are typically injected into a high-pressure reaction vessel for smelting to extract nickel and cobalt from the laterite nickel ore.

[0007] Chinese patent CN211256037U discloses an acid addition device and a high-pressure vessel with it, including: an acid addition passage; a first sealing member, the first sealing member is welded to the outer wall at one end of the acid addition passage and is suitable for stopping and sealing the concentrated sulfuric acid pipeline; a first connecting member, the first connecting member is annularly arranged around the acid addition passage and is located on one side of the first sealing member, suitable for fixing the concentrated sulfuric acid pipeline; a second connecting member, the second connecting member is annularly arranged around the acid addition passage and is located on the side of the first connecting member away from the first sealing member, suitable for connecting to the high- pressure vessel nozzle; a second sealing member, the second sealing member is welded to the outer wall of the acid addition passage and is located on the side of the second connecting member away from the first connecting member, suitable for stopping and sealing the high-pressure vessel nozzle.

[0008] In the above technology, the pipeline is inserted into the fixing member for fixing, but there is a gap between the fixing member and the pipeline, which leads to small amplitude vibration of the pipeline during the acid addition process, resulting in severe fatigue damage and significantly reducing the service life of the acid addition device.

[0009] SUMMARY

[0010] The purpose of this application is to overcome the above technical deficiencies and to propose an acid addition device that solves the technical problem of severe fatigue damage and significantly reduced service life of the acid addition device due to small amplitude vibration of the pipeline in the existing technology .

[0011] To achieve the above technical purpose, this application adopts the following technical solution:

[0012] This application provides an acid addition device for a high- pressure vessel, characterized in that the high-pressure vessel side wall has an acid addition port, including:

[0013] An acid addition pipe, one end of which extends into the high-pressure vessel through the acid addition port, and the acid addition pipe is rotatably set along its own axis;

[0014] A connecting assembly located at the middle part of the acid addition pipe, which is sealedly connected to the end surface of the acid addition port;

[0015] Multiple abutment components spaced along the circumference of the acid addition pipe and movable in the radial direction of the acid addition pipe, wherein when the abutment components move away from the acid addition pipe, they abut against the side wall of the acid addition port to fix the acid addition pipe ;

[0016] A transmission assembly connecting the abutment components with the acid addition pipe, which drives the abutment components to move radially along the acid addition pipe through the rotation of the acid addition pipe.

[0017] In some embodiments, the transmission assembly includes an installation sleeve and a connecting sleeve, the installation sleeve is rotatably sleeved on the acid addition pipe, and the abutment components are radially movable installed on the installation sleeve; the connecting sleeve is axially movable sleeved on the acid addition pipe, the connecting sleeve is drivingly connected with the acid addition pipe to drive the connecting sleeve to move axially through the rotation of the acid addition pipe, the connecting sleeve is connected with multiple abutment components to drive the abutment components to move radially through the axial movement of the connecting sleeve In some embodiments, the abutment components have elongated holes ;

[0018] The transmission assembly also includes multiple scissors mechanisms corresponding to the multiple abutment components, the scissors mechanism includes a first connecting rod and a second connecting rod, the first connecting rod is rotatably connected at both ends with the connecting sleeve and the abutment component, the second connecting rod is rotatably connected at one end with the installation sleeve, the other end of the second connecting rod is slidably and rotatably installed in the elongated hole, the middle part of the first connecting rod and the middle part of the second connecting rod are rotatably connected.

[0019] In some embodiments, the connecting sleeve has internal threads, and the acid addition pipe has external threads, and the connecting sleeve is threadedly connected with the acid addition pipe.

[0020] In some embodiments, the inner wall of the acid addition port has a first limiting groove;

[0021] The installation sleeve has a first limiting protrusion on the outer periphery, and when the acid addition pipe rotates, the first limiting protrusion cooperates with the first limiting groove to limit the rotation of the installation sleeve.

[0022] In some embodiments, the side of the abutment components facing the side wall of the acid addition port has an anti-slip structure .

[0023] In some embodiments, the side of the abutment components facing the side wall of the acid addition port is arcuate.

[0024] In some embodiments, the connecting assembly includes a first sealing ring and a first flange plate, the first sealing ring is installed on the outer periphery of the acid addition pipe, the first sealing ring is used for sealing with the end surface of the acid addition port, the first flange plate is sleeved on the outer periphery of the acid addition pipe and is located above the first sealing ring, the first flange plate is used for connecting with the end surface flange of the acid addition port.

[0025] In some embodiments, the outer periphery of the acid addition pipe has a second limiting protrusion located above the first sealing ring;

[0026] The first flange plate has a second limiting groove in the central hole, and the second limiting groove cooperates with the second limiting protrusion to limit the rotation of the first flange plate.

[0027] Additionally, this invention also provides a high-pressure vessel, which includes the acid addition device described in the above technical solution.

[0028] Compared with the existing technology, the acid addition device provided by this application, the acid addition pipe has one end extending into the high-pressure vessel through the acid addition port, and the acid addition pipe is rotatably set along its own axis, the diameter of the acid addition pipe is smaller than the diameter of the acid addition port; the connecting assembly is located at the middle part of the acid addition pipe, the connecting assembly is sealedly connected to the end surface of the acid addition port; multiple abutment components are spaced along the circumference of the acid addition pipe and movable in the radial direction of the acid addition pipe, when the abutment components move away from the acid addition pipe, they abut against the side wall of the acid addition port to fix the acid addition pipe, in specific use, first extend a part of the acid addition pipe into the acid addition port, the connecting assembly is in abutment with the end surface of the acid addition port, at this time the abutment components are located inside the acid addition port, finally rotate the acid addition pipe, through the transmission assembly drive the abutment components to move away from the acid addition pipe, thereby causing the abutment components to abut tightly against the side wall of the acid addition port, using the abutment of the abutment components with the side wall of the acid addition port, thereby fixing the part of the acid addition pipe that extends into the reaction vessel, thereby solving the problem of short service life of the acid addition pipe due to shaking during the acid addition process, resulting in fatigue damage.

[0029] The above description is only an overview of the technical solution of this application. For a clearer understanding of the technical means of this application and to implement it according to the content of the specification, the best embodiment of this application and its detailed description are given below in conjunction with the drawings. The specific implementation of this application is detailed in the following examples and drawings .

[0030] BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG.l is a structural schematic diagram of a high-pressure vessel embodiment provided in this application;

[0032] FIG. 2 is a main view sectional view of the high-pressure vessel in Figure 1;

[0033] FIG. 3 is a top view sectional view of the high-pressure vessel in Figure 1;

[0034] FIG. 4 is a three-dimensional schematic diagram of the acid addition device provided in this application;

[0035] FIG. 5 is a main view of the acid addition device in Figure 4;

[0036] FIG. 6 is a partial schematic diagram of the acid addition device in Figure 4;

[0037] FIG. 7 is a top view sectional view of the acid addition device in Figure 4.

[0038] Note on the attached drawings :

[0039] 100-Acid addition device, 1-Acid addition pipe, Il-Second limiting protrusion, 2-Connecting assembly, 21-First sealing ring, 22-First flange plate, 221-Second limiting groove, 3- Abutment component, 31-Elongated hole, 4-Transmission assembly, 41-Installation sleeve, 411-First limiting protrusion, 42- Connecting sleeve, 43-First connecting rod, 44-Second connecting rod, 5-Second flange, 6-Second sealing ring, 200-High-pressure vessel, 210-Acid addition port, 220-First limiting groove. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0040] To make the purpose, technical solution, and advantages of this application more clear and understandable, the following further detailed description of this application is combined with the drawings and embodiments. It should be understood that the specific embodiments described here are only for explaining this application and do not limit this application.

[0041] In order to solve the technical problem that the pipeline still has a small amplitude vibration, severe fatigue damage, and significantly reduces the service life of the acid addition device in the existing technology, this application provides an acid addition device, which uses the abutment of the abutment component with the side wall of the acid addition port to fix the part of the acid addition pipe that extends into the reaction kettle, thereby solving the problem of short service life of the acid addition pipe due to shaking during the acid addition process .

[0042] Refer to Figure 1 to Figure 3, in addition, this invention provides a high-pressure vessel, which includes the acid addition device described in the above technical solution.

[0043] In this embodiment, the high-pressure vessel 200 is a horizontal high-pressure reaction vessel, the acid addition port 210 is located on the upper side wall of the high-pressure vessel 200, that is, the upper side wall of the high-pressure vessel 200 is inserted with an acid pipeline, the upper end of the acid pipeline extends out of the high-pressure vessel 200, the lower end of the acid pipeline extends into the high-pressure vessel 200, and the channel inside the acid pipeline constitutes the acid addition port 210. The acid addition device 100 is connected and fixed to the acid pipeline.

[0044] Refer to Figure 4, Figure 4 is a structural schematic diagram of the acid addition device in an embodiment of this application.

[0045] This application provides an acid addition device 100, applied to the high-pressure vessel 200, the high-pressure vessel 200 side wall has an acid addition port 210, including an acid addition pipe 1, a connecting assembly 2, multiple abutment components, and a transmission assembly 4. One end of the acid addition pipe 1 extends into the high-pressure vessel 200 through the acid addition port 210, and the acid addition pipe 1 is rotatably set along its own axis. The connecting assembly 2 is located at the middle part of the acid addition pipe 1 and is sealedly connected to the end surface of the acid addition port 210. Multiple abutment components 3 are spaced along the circumference of the acid addition pipe 1 and are movable in the radial direction of the acid addition pipe 1. When the abutment components 3 move away from the acid addition pipe 1, they abut against the side wall of the acid addition port 210 to fix the acid addition pipe 1. The transmission assembly 4 connects the abutment components 3 with the acid addition pipe 1, driving the abutment components 3 to move radially along the acid addition pipe 1 through the rotation of the acid addition pipe 1.

[0046] In this embodiment, refer to Figure 1, Figure 2, and Figure 4, one end of the acid addition pipe 1 extends into the high- pressure vessel 200 through the acid addition port 210, and the acid addition pipe 1 is rotatably set along its own axis. The diameter of the acid addition pipe 1 is smaller than the diameter of the acid addition port 210. The connecting assembly 2 is located at the middle part of the acid addition pipe 1 and is sealedly connected to the end surface of the acid addition port 210. Multiple abutment components 3 are spaced along the circumference of the acid addition pipe 1 and are movable in the radial direction of the acid addition pipe 1, so as to abut against the side wall of the acid addition port 210 and fix the acid addition pipe 1 when moving away from the acid addition pipe 1. In specific use, first extend a part of the acid addition pipe 1 into the acid addition port 210, the connecting assembly 2 is in abutment with the end surface of the acid addition port 210, at this time the abutment components 3 are located inside the acid addition port 210, finally rotate the acid addition pipe 1, through the transmission assembly 4 drive the abutment components 3 to move away from the acid addition pipe 1, thereby causing the abutment components 3 to abut tightly against the side wall of the acid addition port 210. Using the abutment of the abutment components 3 with the side wall of the acid addition port 210, thereby fixing the part of the acid addition pipe 1 that extends into the reaction vessel, avoiding shaking of the acid addition pipe 1 during the acid addition process, thereby solving the problem of severe fatigue damage and short service life of the acid addition pipe 1.

[0047] In this embodiment, the acid addition pipe 1 can be set to rotate in the positive or reverse direction. The abutment components 3 have a fixed state where they move away from the acid addition pipe 1 to abut against the side wall of the acid addition port 210 and an unlocking state where they move towards the acid addition pipe 1 to disengage from contact with the side wall of the acid addition port 210. In the initial state, the abutment components 3 are in the unlocking state. Insert the lower part of the acid addition pipe 1 into the acid addition port 210, and make the connecting assembly 2 abut against the end surface of the acid addition port 210. At this time, the abutment components 3 are located inside the acid addition port 210. Finally, rotate the acid addition pipe 1, through the transmission assembly 4 drive the abutment components 3 to move away from the acid addition pipe 1, and be in the fixed state, completing the fixation of the lower part of the acid addition pipe 1. Then connect the connecting assembly 2 with the end surface of the acid addition port 210 to complete the fixation and sealing of the upper part of the acid addition pipe 1, thus completing the entire installation of the acid addition pipe 1. Then connect the acid addition pipe 1 with the acid pipeline for acid transportation. When it is necessary to disassemble for maintenance, first disassemble the connecting assembly 2 to enable the acid addition pipe 1 to rotate, then rotate the acid addition pipe 1 in the reverse direction, through the transmission assembly 4 drive the abutment components 3 to move towards the acid addition pipe 1, and be in the unlocking state.

[0048] In one embodiment, refer to Figure 4 to Figure 6, the transmission assembly 4 includes an installation sleeve 41 and a connecting sleeve 42, the installation sleeve 41 is rotatably sleeved on the acid addition pipe 1, the abutment components 3 are radially movable installed on the installation sleeve 41; the connecting sleeve 42 is axially movable sleeved on the acid addition pipe 1, the connecting sleeve 42 is drivingly connected with the acid addition pipe 1 to drive the connecting sleeve 42 to move axially through the rotation of the acid addition pipe 1, the connecting sleeve 42 is connected with multiple abutment components 3 to drive the abutment components 3 to move radially through the axial movement of the connecting sleeve 42.

[0049] In this embodiment, the installation sleeve 41 and the connecting sleeve 42 are spaced and sleeved from top to bottom on the outer periphery of the acid addition pipe 1. The inner diameter of the installation sleeve 41 is adapted to the outer diameter of the acid addition pipe 1. The installation sleeve 41 can rotate around the acid addition pipe 1 and axially position it. The abutment components 3 are radially movable installed on the outer periphery of the installation sleeve 41, ensuring that the abutment components 3 and the acid addition pipe 1 can move relatively. The connecting sleeve 42 can be axially movable along the acid addition pipe 1. The connecting sleeve 42 is connected with the abutment components 3, so that when the connecting sleeve 42 moves axially, it drives the abutment components 3 to move radially. The connecting sleeve 42 is also drivingly connected with the acid addition pipe 1, so that when the acid addition pipe 1 rotates, it drives the connecting sleeve 42 to move axially. By using the connecting sleeve 42 to convert the rotation of the acid addition pipe 1 into radial movement of the abutment components 3, no additional drive device is needed to drive the abutment components 3.

[0050] In one embodiment, refer to Figure 4 to Figure 6, the abutment components 3 have elongated holes 31; the transmission assembly 4 also includes multiple scissors mechanisms corresponding to the multiple abutment components 3, the scissors mechanism includes a first connecting rod 43 and a second connecting rod 44, the first connecting rod 43 is rotatably connected at both ends with the connecting sleeve 42 and the abutment components 3, the second connecting rod 44 is rotatably connected at one end with the installation sleeve 41, the other end of the second connecting rod 44 is slidably and rotatably installed in the elongated hole 31, the middle part of the first connecting rod 43 and the middle part of the second connecting rod 44 are rotatably connected. In this embodiment, in order to convert the vertical movement of the connecting sleeve 42 into radial movement of the abutment components 3, the abutment components 3 have elongated holes 31 and installation holes, the installation holes and the elongated holes 31 are spaced from top to bottom, the elongated holes 31 extend vertically, the first connecting rod 43 and the second connecting rod 44 have pin holes at both ends and in the middle, the installation sleeve 41 and the connecting sleeve 42 have installation protrusions on the outer periphery, the installation protrusions also have pin holes, the first connecting rod 43 is rotatably connected at both ends to the installation holes of the abutment components 3 and the pin holes of the connecting sleeve 42 through pin shafts, the second connecting rod 44 is slidably and rotatably installed in the elongated holes 31 at one end through a pin shaft, the other end of the second connecting rod 44 is rotatably installed in the pin holes of the installation sleeve 41 through a pin shaft, and the middle part of the first connecting rod 43 and the middle part of the second connecting rod 44 are rotatably connected through a pin shaft. When the connecting sleeve 42 moves downward, the abutment components 3 move towards the acid addition pipe 1, and when the connecting sleeve 42 moves upward, the abutment components 3 move away from the acid addition pipe 1.

[0051] In one embodiment, the connecting sleeve 42 has internal threads, and the acid addition pipe 1 has external threads, and the connecting sleeve 42 is threadedly connected with the acid addition pipe 1.

[0052] In this embodiment, in order to convert the rotation of the acid addition pipe 1 into axial movement of the connecting sleeve 42, the outer periphery of the acid addition pipe 1 has external threads, and the connecting sleeve 42 has internal threads, and the connecting sleeve 42 is threadedly engaged with the acid addition pipe 1.

[0053] In one embodiment, refer to Figure 3, the inner wall of the acid addition port 210 has a first limiting groove 220; the outer periphery of the installation sleeve 41 has a first limiting protrusion 411. When the acid addition pipe 1 rotates, the first limiting protrusion 411 cooperates with the first limiting groove 220 to limit the rotation of the installation sleeve 41.

[0054] In this embodiment, the installation sleeve 41 and the acid addition pipe 1 can rotate relatively. In order to prevent the installation sleeve 41 from moving when the acid addition pipe 1 rotates, the inner wall of the acid addition port 210 has a first limiting groove 220, and the outer periphery of the installation sleeve 41 has a first limiting protrusion 411. When the acid addition pipe 1 is extended into the acid addition port 210, the first limiting protrusion 411 is extended into the first limiting groove 220, thereby limiting the installation sleeve 41 circumferentially, to avoid the rotation of the installation sleeve 41.

[0055] In one embodiment, refer to Figure 4 to Figure 5, the side of the abutment components 3 facing the side wall of the acid addition port 210 has an anti-slip structure.

[0056] In this embodiment, in order to increase the friction between the abutment components 3 and the side wall of the acid addition port 210, the side of the abutment components 3 facing the side wall of the acid addition port 210 has an anti-slip structure. The anti-slip structure is beneficial for increasing the friction between the abutment components 3 and the side wall of the acid addition port 210, to prevent relative sliding.

[0057] Specifically, the anti-slip structure is not limited and can be anti-slip patterns, etc.

[0058] In one embodiment, the side of the abutment components 3 facing the side wall of the acid addition port 210 is arcuate.

[0059] In this embodiment, since the acid addition port 210 is a circular hole, in order to increase the contact area with the acid addition port 210, the side of the abutment components 3 facing the side wall of the acid addition port 210 is arcuate and adapted to the acid addition port 210.

[0060] In one embodiment, refer to Figure 4 to Figure 5, the connecting assembly includes a first sealing ring 21 and a first flange plate 22, the first sealing ring 21 is installed on the outer periphery of the acid addition pipe 1, the first sealing ring 21 is used for sealing with the end surface of the acid addition port 210, the first flange plate 22 is sleeved on the outer periphery of the acid addition pipe 1 and is located above the first sealing ring 21, the first flange plate 22 is used for connecting with the end surface flange of the acid addition port 210 .

[0061] In this embodiment, since the high-pressure vessel 200 works in a high- temperature and high-pressure environment, it is necessary to ensure the sealing of the high-pressure vessel 200. The first sealing ring 21 is welded on the outer periphery of the acid addition pipe 1 and is located in the middle area of the acid addition pipe 1. The first flange is axially movable and rotatable on the outer periphery of the acid addition pipe 1. By using the first sealing ring 21 and the first flange plate 22, the acid addition pipe 1 can be fixed in the acid addition port 210 and ensure the sealing of the acid addition port 210.

[0062] In one embodiment, refer to Figure 7, the outer periphery of the acid addition pipe 1 has a second limiting protrusion 11 located above the first sealing ring 21; the first flange plate 22 has a second limiting groove 221 in the central hole, and the second limiting groove 221 cooperates with the second limiting protrusion 11 to limit the rotation of the first flange plate 22.

[0063] In this embodiment, when driving the abutment components 3 to move, it is necessary to rotate the acid addition pipe 1. In order to facilitate the rotation of the acid addition pipe 1, the outer periphery of the acid addition pipe 1 has a second limiting protrusion 11, and the first flange plate 22 has a second limiting groove 221 in the central hole. The second limiting groove 221 cooperates with the second limiting protrusion 11 to limit the rotation of the first flange plate 22. Since the diameter of the first flange is much larger than the diameter of the acid addition pipe 1, it is more labor-saving and convenient to rotate the first flange to drive the rotation of the acid addition pipe 1.

[0064] In this embodiment, since the first flange is connected and fixed to the end surface flange of the acid addition port 210 by multiple bolts, in order to ensure that the through hole of the first flange corresponds to the through hole of the end surface flange when the abutment components 3 are in tight contact with the side wall of the acid addition port 210, the second limiting groove 221 is arc-shaped, the angle between the two ends of the second limiting groove 221 to its centerline is greater than the angle between the centerlines of the adjacent through holes on the first flange, and the arc length of the second limiting protrusion 11 is much shorter than the arc length of the second limiting groove 221, allowing the first flange to adjust slightly, ensuring that the through hole of the first flange corresponds to the through hole of the end surface flange when the abutment components 3 are in tight contact with the side wall of the acid addition port 210.

[0065] In this embodiment, the upper end of the acid addition pipe 1 is connected to the acid pipeline, that is, the upper end of the acid addition pipe 1 is welded with a second sealing ring 6, and the outer periphery of the acid addition pipe 1 is also sleeved with a second flange 5, the second flange 5 is located below the second sealing ring 6, and the second flange 5 can be connected to the flange of the acid pipeline, thereby completing the sealing connection between the acid addition pipe 1 and the acid pipeline.

[0066] To better understand this application, the technical solution of this application is described in detail below in conjunction with Figures 1 to 7 :

[0067] During installation, extend the acid addition pipe 1 into the acid addition port 210 so that the first sealing ring is in abutment with the end surface of the acid addition port 210, and the first limiting protrusion 411 is located within the first limiting groove 220 to limit the installation sleeve 41. Then rotate the acid addition pipe 1 through the first flange, the acid addition pipe 1 is threadedly engaged with the connecting sleeve 42, thereby causing the connecting sleeve 42 to move upward and drive the abutment components 3 to move away from the acid addition pipe 1 through the scissors mechanism until they are tightly against the side wall of the acid addition port 210, thus completing the fixation of the acid addition pipe 1. Then connect the first flange with the end surface flange of the acid addition port 210 to complete the sealing, and then connect and seal the second flange 5 and the second sealing ring 6 with the acid pipeline to complete the entire device connection. Use the abutment of the abutment components 3 with the side wall of the acid addition port 210 to fix the part of the acid addition pipe 1 that extends into the reaction vessel, thereby solving the problem of short service life of the acid addition pipe 1 due to shaking during the acid addition process.

[0068] The above description of the specific implementation of this application does not constitute a limitation on the scope of protection of this application. Any other corresponding changes and transformations made based on the technical concept of this application should be included within the scope of protection of the claims of this application.

Claims

WHAT IS CLAIMED IS1. An acid addition device for a high-pressure vessel, characterized in that it includes:An acid addition pipe, one end of which extends into the high-pressure vessel through an acid addition port, and the acid addition pipe is rotatably set along its own axis;A connecting assembly located at the middle part of the acid addition pipe, which is sealedly connected to the end surface of the acid addition port;Multiple abutment components spaced along the circumference of the acid addition pipe and movable in the radial direction of the acid addition pipe, wherein when the abutment components move away from the acid addition pipe, they abut against the side wall of the acid addition port to fix the acid addition pipe ;A transmission assembly connecting the abutment components with the acid addition pipe, which drives the abutment components to move radially along the acid addition pipe through the rotation of the acid addition pipe.

2. The acid addition device as claimed in claim 1, wherein the transmission assembly includes an installation sleeve and a connecting sleeve, the installation sleeve is rotatably sleeved on the acid addition pipe, and the abutment components are radially movable installed on the installation sleeve; the connecting sleeve is axially movable sleeved on the acid addition pipe, the connecting sleeve is drivingly connected with the acid addition pipe to drive the connecting sleeve to move axially through the rotation of the acid addition pipe, the connecting sleeve is connected with the multiple abutment components to drive the abutment components to move radially through the axial movement of the connecting sleeve.

3. The acid addition device as claimed in claim 2, wherein the abutment components have elongated holes.The transmission assembly also includes a plurality of scissor mechanisms corresponding to the multiple abutmentmembers, each scissor mechanism comprising a first connecting rod and a second connecting rod. The first connecting rod has opposite ends rotatably connected to the connecting sleeve and the abutment member, respectively. One end of the second connecting rod is rotatably connected to the installation sleeve, while the other end is slidably and rotatably mounted within the elongated hole. The middle part of the first connecting rod is rotatably connected to the middle part of the second connecting rod .

4. The acid addition device as claimed in claim 2, wherein the connecting sleeve has internal threads, the acid addition pipe has external threads, and the connecting sleeve is threadedly connected with the acid addition pipe.

5. The acid addition device as claimed in claim 2, wherein the inner wall of the acid addition port has a first limiting groove;The installation sleeve has a first limiting protrusion on the outer periphery, and when the acid addition pipe rotates, the first limiting protrusion cooperates with the first limiting groove to limit the rotation of the installation sleeve.

6. The acid addition device as claimed in claim 1, wherein the side of the abutment components facing the side wall of the acid addition port has an anti-slip structure.

7. The acid addition device as claimed in claim 1, wherein the side of the abutment components facing the side wall of the acid addition port is arcuate.

8. The acid addition device as claimed in claim 1, wherein the connecting assembly includes a first sealing ring and a first flange plate, the first sealing ring is installed on the outer periphery of the acid addition pipe, the first sealing ring is used for sealing with the end surface of the acid addition port, the first flange plate is sleeved on the outer periphery of the acid addition pipe and is located above the first sealing ring,the first flange plate is used for connecting with the end surface flange of the acid addition port.

9. The acid addition device as claimed in claim 8, wherein the outer periphery of the acid addition pipe has a second limiting protrusion located above the first sealing ring;The first flange plate has a second limiting groove in the central hole, and the second limiting groove cooperates with the second limiting protrusion to limit the rotation of the first flange plate.

10. A high-pressure vessel, characterized in that it includes the acid addition device as described in any one of claims 1-9.

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