An acid addition device and a high-pressure reactor

Abstract

This application discloses an acid addition device and a high-pressure reactor. 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 reactor through an acid addition hole, and the acid addition pipe is rotatably arranged along its own axis. The connecting assembly is located in the middle of the acid addition pipe and is sealed to the end face of the acid addition hole. Multiple abutment components are spaced apart circumferentially along the acid addition pipe and are movably arranged radially along the acid addition pipe. When the abutment component moves away from the acid addition pipe, it abuts against the side wall of the acid addition hole to fix the acid addition pipe. The transmission assembly connects the abutment components and the acid addition pipe, and drives the abutment components to move radially along the acid addition pipe through the rotation of the acid addition pipe. This application utilizes the abutment components to abut against the side wall of the acid addition hole to fix the portion of the acid addition pipe extending into the reactor, thereby solving the problem of short lifespan of the acid addition pipe due to fatigue damage caused by pipe shaking during the acid addition process.

Description

Technical Field

[0001] This application relates to the technical field of laterite nickel ore processing equipment, specifically to an acid addition device and a high-pressure autoclave. Background Technology

[0002] Currently, in the hydrometallurgical process for laterite nickel ore, slurry, sulfuric acid, and steam are typically injected into a high-pressure reactor for smelting to leach nickel and cobalt from the laterite nickel ore.

[0003] Chinese patent CN211256037U discloses an acid-adding device and a high-pressure reactor having the same, comprising: an acid-adding channel; a first sealing member, the first sealing member being welded to the outer wall of one end of the acid-adding channel and adapted to stop and seal a concentrated sulfuric acid pipeline; a first connecting member, the first connecting member being movably disposed around the acid-adding channel and located on one side of the first sealing member, and adapted to fix the concentrated sulfuric acid pipeline; a second connecting member, the second connecting member being movably disposed around the acid-adding channel and located on the side of the first connecting member away from the first sealing member, and adapted to connect to the port of the high-pressure reactor; and a second sealing member, the second sealing member being welded to the outer wall of the acid-adding channel and located on the side of the second connecting member away from the first connecting member, and adapted to stop and seal the port of the high-pressure reactor.

[0004] In the above technology, the pipe is inserted into the fixing component for fixation. However, there is a gap between the fixing component and the pipe, which causes the pipe to still vibrate slightly during the acid addition process, resulting in severe fatigue damage and significantly reducing the service life of the acid addition device. Summary of the Invention

[0005] The purpose of this application is to overcome the above-mentioned technical deficiencies and propose an acid addition device that solves the technical problem that the pipeline in the prior art still has small-amplitude vibration, serious fatigue damage, and significantly reduced service life of the acid addition device.

[0006] To achieve the above-mentioned technical objectives, this application adopts the following technical solution:

[0007] This application provides an acid addition device for use in a high-pressure reactor, wherein the high-pressure reactor has an acid addition port on its side wall, comprising:

[0008] An acid-adding tube, one end of which extends into the high-pressure reactor through the acid-adding hole, is rotatably arranged along its own axis;

[0009] A connecting component is located in the middle of the acid addition tube, and the connecting component is sealed to the end face of the acid addition hole;

[0010] Multiple abutting members are arranged at intervals along the circumference of the acid adding tube, and the abutting members are movably arranged in the radial direction of the acid adding tube. When the abutting members move away from the acid adding tube, the abutting members abut against the side wall of the acid adding hole to fix the acid adding tube.

[0011] A transmission assembly connects the abutment to the acid-adding tube and acts to drive the abutment to move radially along the acid-adding tube through the rotation of the acid-adding tube.

[0012] In some embodiments, the transmission assembly includes a mounting sleeve and a connecting sleeve. The mounting sleeve is rotatably fitted onto the acid-adding pipe, and the abutment is radially movably mounted on the mounting sleeve. The connecting sleeve is axially movably fitted onto the acid-adding pipe and is drively connected to the acid-adding pipe so that the rotation of the acid-adding pipe drives the connecting sleeve to move axially. The connecting sleeve is connected to a plurality of the abutments so that the axial movement of the connecting sleeve drives the abutments to move radially.

[0013] In some embodiments, the abutment member is provided with an elongated hole;

[0014] The transmission assembly also includes a plurality of scissor mechanisms corresponding one-to-one with the plurality of abutment members. Each scissor mechanism includes a first connecting rod and a second connecting rod. The two ends of the first connecting rod are rotatably connected to the connecting sleeve and the abutment member, respectively. One end of the second connecting rod is rotatably connected to the mounting sleeve. The other end of the second connecting rod is slidably and rotatably installed in the elongated hole. The middle parts of the first connecting rod and the middle parts of the second connecting rod are rotatably connected.

[0015] In some embodiments, the connecting sleeve has an internal thread, the acid adding pipe has an external thread, and the connecting sleeve is threadedly connected to the acid adding pipe.

[0016] In some embodiments, a first limiting groove is provided on the inner sidewall of the acid addition hole;

[0017] The mounting sleeve has a first limiting protrusion on its outer periphery. When the acid tube rotates, the first limiting protrusion cooperates with the first limiting groove to limit the rotation of the mounting sleeve.

[0018] In some embodiments, the abutment has an anti-slip structure on the side facing the acid filling hole sidewall.

[0019] In some embodiments, the abutment is arc-shaped on the side facing the acid filling hole sidewall.

[0020] In some embodiments, the connecting assembly includes a first sealing ring and a first flange. The first sealing ring is installed on the outer periphery of the acid filling pipe and is used to seal with the end face of the acid filling hole. The first flange is sleeved on the outer periphery of the acid filling pipe and is located above the first sealing ring. The first flange is used to connect with the end face flange of the acid filling hole.

[0021] In some embodiments, the acid addition tube is provided with a second limiting protrusion on its outer periphery, and the second limiting protrusion is located above the first sealing ring;

[0022] The first flange has a second limiting groove at the through hole in the middle. The second limiting groove and the second limiting protrusion cooperate to limit the rotation of the first flange and the acid adding pipe.

[0023] In addition, the present invention also provides a high-pressure reactor, which includes the acid addition device described in the above technical solution.

[0024] Compared with the prior art, the acid adding device provided in this application has an acid adding tube that extends into the high-pressure reactor from the acid adding hole at one end. The acid adding tube is rotatably arranged along its own axis, and the diameter of the acid adding tube is smaller than the diameter of the acid adding hole. The connecting assembly is located in the middle of the acid adding tube and is sealed to the end face of the acid adding hole. A plurality of abutting members are arranged circumferentially along the acid adding tube and are movably arranged radially along the acid adding tube. When the abutting member moves away from the acid adding tube, it abuts against the side wall of the acid adding hole to fix it. In practical use, the acid adding tube is first inserted into the acid adding hole, and the connecting component abuts against the end face of the acid adding hole. At this time, the abutting member is located inside the acid adding hole. Finally, the acid adding tube is rotated, and the transmission component drives the abutting member to move away from the acid adding tube, thereby making the abutting member abut against the side wall of the acid adding hole. By abutting against the side wall of the acid adding hole, the part of the acid adding tube inserted into the reactor is fixed, thus solving the problem of short life of the acid adding tube due to fatigue damage caused by the shaking of the acid adding tube during the acid adding process.

[0025] The above description is merely an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it according to the contents of the specification, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings. The specific implementation methods of this application are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of the high-pressure reactor provided in this application;

[0027] Figure 2 yes Figure 1 Front sectional view of a medium-pressure autoclave;

[0028] Figure 3 yes Figure 1 Top sectional view of a medium-pressure autoclave;

[0029] Figure 4 This is a three-dimensional schematic diagram of the acid addition device provided in this application;

[0030] Figure 5 yes Figure 4 Front view of the acid addition unit;

[0031] Figure 6 yes Figure 4 A partial schematic diagram of the acid addition unit;

[0032] Figure 7 yes Figure 4 Top sectional view of the acid addition unit.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100-Acid adding device, 1-Acid adding pipe, 11-Second limiting protrusion, 2-Connecting assembly, 21-First sealing ring, 22-First flange, 221-Second limiting groove, 3-Abutting part, 31-Elongated hole, 4-Transmission assembly, 41-Mounting 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 adding hole, 220-First limiting groove. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0036] To address the technical problem that existing pipelines still experience slight vibrations, resulting in severe fatigue damage and significantly reduced service life of acid addition devices, this application provides an acid addition device that uses a contact member to abut against the side wall of the acid addition hole to fix the portion of the acid addition pipe extending into the reactor. This solves the problem that the acid addition pipe's lifespan is shortened due to fatigue damage caused by shaking during the acid addition process.

[0037] Please see Figures 1 to 3 Furthermore, the present invention provides a high-pressure reactor, which includes the acid addition device described in the above technical solution.

[0038] In this embodiment, the high-pressure reactor 200 is a horizontal high-pressure reactor. The acid inlet 210 is located on the upper side wall of the high-pressure reactor 200. That is, an acid inlet pipe is inserted into the upper side wall of the high-pressure reactor 200. The upper end of the acid inlet pipe extends out of the high-pressure reactor 200, and the lower end of the acid inlet pipe extends into the high-pressure reactor 200. The channel inside the acid inlet pipe constitutes the acid inlet 210. The acid inlet device 100 is connected and fixed to the acid inlet pipe.

[0039] Please see Figure 4 , Figure 4 This is a schematic diagram of the acid addition device in one embodiment of this application.

[0040] This application provides an acid addition device 100, applied to a high-pressure reactor 200. The high-pressure reactor 200 has an acid addition hole 210 on its side wall, and includes an acid addition tube 1, a connecting component 2, multiple abutment components, and a transmission component 4. One end of the acid addition tube 1 extends into the high-pressure reactor 200 through the acid addition hole 210, and the acid addition tube 1 is rotatably arranged along its own axis. The connecting component 2 is located in the middle of the acid addition tube 1, and the connecting component 2 is sealed to the end face of the acid addition hole 210. Multiple abutment components 3 are arranged circumferentially along the acid addition tube 1, and the abutment components 3 are movably arranged in the radial direction of the acid addition tube 1. When the abutment components 3 move away from the acid addition tube 1, the abutment components 3 abut against the side wall of the acid addition hole 210 to fix the acid addition tube 1. The transmission component 4 connects the abutment components 3 and the acid addition tube 1, and acts to drive the abutment components 3 to move in the radial direction of the acid addition tube 1 through the rotation of the acid addition tube 1.

[0041] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 4 One end of the acid-adding tube 1 extends into the autoclave 200 through the acid-adding hole 210. The acid-adding tube 1 is rotatable along its own axis, and its diameter is smaller than that of the acid-adding hole 210. The connecting assembly 2 is located in the middle of the acid-adding tube 1 and is sealed to the end face of the acid-adding hole 210. Multiple abutment members 3 are spaced apart circumferentially along the acid-adding tube 1 and are movably arranged radially along the acid-adding tube 1. When moving away from the acid-adding tube 1, the abutment member 3 abuts against and fixes the acid-adding tube 1 against the side wall of the acid-adding hole 210. In practical use… First, the acid adding tube 1 is inserted into the acid adding hole 210. The connecting component 2 abuts against the end face of the acid adding hole 210. At this time, the abutting member 3 is located inside the acid adding hole 210. Finally, the acid adding tube 1 is rotated, and the transmission component 4 drives the abutting member 3 to move away from the acid adding tube 1, so that the abutting member 3 abuts against the side wall of the acid adding hole 210. By abutting against the side wall of the acid adding hole 210, the part of the acid adding tube 1 inserted into the reactor is fixed, avoiding the acid adding tube 1 from shaking during the acid adding process, thereby solving the problem of severe fatigue damage and short life of the acid adding tube 1.

[0042] In this embodiment, the acid-adding tube 1 can be rotated in both directions. The abutting member 3 has a fixed state in which it moves away from the acid-adding tube 1 and abuts against the side wall of the acid-adding hole 210, and an unlocked state in which it moves towards the acid-adding tube 1 and disengages from the side wall of the acid-adding hole 210. Initially, the abutting member 3 is in the unlocked state. The lower part of the acid-adding tube 1 is inserted into the acid-adding hole 210, and the connecting assembly 2 abuts against the end face of the acid-adding hole 210. At this time, the acid-adding tube 1 is in place. Then, the acid-adding tube 1 is rotated, and the abutting member 3 is driven away from the side wall of the acid-adding hole 210 by the transmission assembly 4. The acid-adding tube 1 moves in one direction and is in the fixed state, completing the fixation of the lower part of the acid-adding tube 1. Then, the connecting component 2 is connected to the end face of the acid-adding hole 210 to complete the fixation and sealing of the upper part of the acid-adding tube 1, thereby completing the installation of the entire acid-adding tube 1. Then, the acid-adding tube 1 is connected to the acid liquid pipeline to transport the acid liquid. When disassembly and maintenance are required, the connecting component 2 is first disassembled so that the acid-adding tube can rotate. Then, the acid-adding tube 1 is rotated in the opposite direction, and the transmission component 4 drives the abutment 3 to move towards the acid-adding tube 1, which is in the unlocked state.

[0043] In one embodiment, please refer to Figures 4 to 6 The transmission assembly 4 includes a mounting sleeve 41 and a connecting sleeve 42. The mounting sleeve 41 is rotatably sleeved on the acid adding pipe 1, and the abutment 3 is radially movably mounted on the mounting sleeve 41. The connecting sleeve 42 is axially movably sleeved on the acid adding pipe 1, and the connecting sleeve 42 is drively connected to the acid adding pipe 1 so that the rotation of the acid adding pipe 1 drives the connecting sleeve 42 to move axially. The connecting sleeve 42 is connected to a plurality of abutment 3 so that the axial movement of the connecting sleeve 42 drives the abutment 3 to move radially.

[0044] In this embodiment, the mounting sleeve 41 and the connecting sleeve 42 are spaced apart from top to bottom on the outer periphery of the acid-adding tube 1. The inner diameter of the mounting sleeve 41 is adapted to the outer diameter of the acid-adding tube 1. The mounting sleeve 41 can rotate around the acid-adding tube 1 and is axially limited thereto. The abutment 3 is movably mounted on the outer periphery of the mounting sleeve 41 in the radial direction to ensure that the abutment 3 and the acid-adding tube 1 can move relative to each other. The connecting sleeve 42 can be movably arranged along the axial direction of the acid-adding tube 1. The connecting sleeve 42 is connected to the abutment 3, so that when the connecting sleeve moves axially, it drives the abutment 3 to move radially. The connecting sleeve 42 is also connected to the acid-adding tube 1 in a transmission connection, so that when the acid-adding tube 1 rotates, it drives the connecting sleeve 42 to move in the axial direction. By using the connecting sleeve 42 to convert the rotation of the acid-adding tube 1 into the radial movement of the abutment 3, the movement of the abutment 3 can be driven without an additional driving device.

[0045] In one embodiment, please refer to Figures 4 to 6 The abutment 3 is provided with an elongated hole 31; the transmission assembly 4 also includes a plurality of scissor mechanisms corresponding one-to-one with the plurality of abutment 3. The scissor mechanism includes a first connecting rod 43 and a second connecting rod 44. The two ends of the first connecting rod 43 are rotatably connected to the connecting sleeve 42 and the abutment 3, respectively. One end of the second connecting rod 44 is rotatably connected to the mounting 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.

[0046] In this embodiment, in order to convert the vertical movement of the connecting sleeve 42 into the radial movement of the abutment 3, the abutment 3 is provided with an elongated hole 31 and a mounting hole, the mounting hole and the elongated hole 31 being spaced apart from top to bottom, the elongated hole 31 extending vertically, pin holes being provided at both ends and the middle of the first connecting rod 43 and the second connecting rod 44, and mounting protrusions being provided on the outer periphery of the mounting sleeve 41 and the connecting sleeve 42, the mounting protrusions also being provided with pin holes, the two ends of the first connecting rod 43 being connected to the abutment 3 by pins. The mounting hole and the pin hole of the connecting sleeve 42 are rotatably connected. One end of the second connecting rod 44 is slidably and rotatably installed in the elongated hole 31 through a pin shaft. The other end of the second connecting rod 44 is rotatably installed in the pin hole of the mounting sleeve 41 through a pin shaft. 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 3 moves toward the acid adding pipe 1. When the connecting sleeve 42 moves upward, the abutment 3 moves away from the acid adding pipe 1.

[0047] In one embodiment, the connecting sleeve 42 is provided with an internal thread, the acid adding tube 1 is provided with an external thread, and the connecting sleeve 42 is threadedly connected to the acid adding tube 1.

[0048] In this embodiment, in order to convert the rotation of the acid-adding tube 1 into the axial movement of the connecting sleeve 42, the outer periphery of the acid-adding tube 1 is provided with an external thread, the connecting sleeve 42 is provided with an internal thread, and the connecting sleeve 42 is threadedly engaged with the acid-adding tube 1.

[0049] In one embodiment, please refer to Figure 3 The inner wall of the acid filling hole 210 is provided with a first limiting groove 220; the outer periphery of the mounting sleeve 41 is provided with a first limiting protrusion 411. When the acid filling tube 1 rotates, the first limiting protrusion 411 and the first limiting groove 220 are matched to limit the rotation of the mounting sleeve 41.

[0050] In this embodiment, the mounting sleeve 41 and the acid-adding tube 1 can rotate relative to each other. To prevent the mounting sleeve 41 from moving when the acid-adding tube 1 rotates, the inner sidewall of the acid-adding hole 210 is provided with a first limiting groove 220, and the outer periphery of the mounting sleeve 41 is provided with a first limiting protrusion 411. When the acid-adding tube 1 extends into the acid-adding hole 210, the first limiting protrusion 411 extends into the first limiting groove 220, thereby circumferentially limiting the mounting sleeve 41 to prevent the mounting sleeve 41 from rotating.

[0051] In one embodiment, please refer to Figures 4 to 5 The abutment 3 has an anti-slip structure on the side facing the acid filling hole 210 sidewall.

[0052] In this embodiment, in order to increase the friction between the abutment 3 and the side wall of the acid filling hole 210, the abutment 3 is provided with an anti-slip structure on the side facing the side wall of the acid filling hole 210. By setting the anti-slip structure, it is beneficial to increase the friction between the abutment 3 and the side wall of the acid filling hole 210 and avoid the two sliding relative to each other.

[0053] Specifically, the anti-slip structure is not limited to any particular type and can be anti-slip textures, etc.

[0054] In one embodiment, the abutment 3 is arc-shaped on the side facing the sidewall of the acid filling hole 210.

[0055] In this embodiment, since the acid filling hole 210 is a circular hole, in order to increase the contact area with the acid filling hole 210, the side of the abutment 3 facing the sidewall of the acid filling hole 210 is arc-shaped and adapted to the acid filling hole 210.

[0056] In one embodiment, please refer to Figures 4 to 5 The connecting assembly includes a first sealing ring 21 and a first flange 22. The first sealing ring 21 is installed on the outer periphery of the acid adding pipe 1 and is used to seal with the end face of the acid adding hole 210. The first flange 22 is sleeved on the outer periphery of the acid adding pipe 1 and is located above the first sealing ring 21. The first flange 22 is used to connect with the end face flange of the acid adding hole 210.

[0057] In this embodiment, since the autoclave 200 operates in a high-temperature and high-pressure environment, it is necessary to ensure the airtightness of the autoclave 200. The first sealing ring 21 is welded to the outer periphery of the acid adding pipe 1 and is located in the middle region of the acid adding pipe 1. The first flange is sleeved on the outer periphery of the acid adding pipe 1 and can move axially and rotate circumferentially. By using the first sealing ring 21 and the first flange 22, the acid adding pipe 1 can be fixed in the acid adding hole 210 and the airtightness of the acid adding hole 210 can be ensured.

[0058] In one embodiment, please refer to Figure 7 The acid adding pipe 1 has a second limiting protrusion 11 on its outer periphery, which is located above the first sealing ring 21; the first flange 22 has a second limiting groove 221 at the through hole in the middle, which is matched with the second limiting protrusion 11 to limit the first flange 22 and the acid adding pipe 1 to rotate synchronously.

[0059] In this embodiment, when the abutment 3 is driven to move, the acid adding tube 1 needs to rotate. In order to facilitate the rotation of the acid adding tube 1, a second limiting protrusion 11 is provided on the outer periphery of the acid adding tube 1, and a second limiting groove 221 is provided at the through hole in the middle of the first flange 22. The second limiting groove 221 and the second limiting protrusion 11 limit each other. Since the diameter of the first flange is much larger than the diameter of the acid adding tube 1, it is more labor-saving and convenient to drive the acid adding tube 1 to rotate by rotating the first flange.

[0060] In this embodiment, since the first flange is connected and fixed to the end face flange of the acid filling hole 210 by multiple bolts, in order to ensure that the through hole of the first flange corresponds to the through hole of the end face flange when the abutment 3 is pressed against the side wall of the acid filling hole 210, the second limiting groove 221 is arc-shaped. The included angle between the two ends of the second limiting groove 221 and its center is greater than the included angle between the centers of two adjacent through holes on the first flange, and the arc length of the second limiting protrusion 11 is much smaller than the arc length of the second limiting groove 221, so that the first flange can be adjusted within a small range to ensure that the through hole of the first flange corresponds to the through hole of the end face flange when the abutment 3 is pressed against the side wall of the acid filling hole 210.

[0061] In this embodiment, the upper end of the acid adding pipe 1 is connected to the acid liquid pipeline, that is, the upper end of the acid adding pipe 1 is welded with a second sealing ring 6, and the outer periphery of the acid adding pipe 1 is also fitted 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 liquid pipeline, thereby completing the sealed connection between the acid adding pipe 1 and the acid liquid pipeline.

[0062] To better understand this application, the following is combined with... Figures 1 to 7 The technical solution of this application is described in detail below:

[0063] During installation, the acid-adding tube 1 is inserted into the acid-adding hole 210, so that the first seal abuts against the end face of the acid-adding hole 210, and the first limiting protrusion 411 is located in the first limiting groove 220 to limit the mounting sleeve 41. Then, the acid-adding tube 1 is rotated by the first flange, and the acid-adding tube 1 is threadedly engaged with the connecting sleeve 42, thereby causing the connecting sleeve 42 to move upward. The scissor mechanism drives the abutment 3 to move away from the acid-adding tube 1 until it is in contact with the... The side wall of the acid addition hole 210 is pressed tightly, thereby fixing the acid addition pipe 1. Then, the first flange is connected to the end flange of the acid addition hole 210 to complete the seal. Then, the second flange 5 and the second sealing ring 6 are connected to the acid liquid pipeline for sealing, thus completing the connection of the entire device. The abutment 3 is used to abut against the side wall of the acid addition hole 210 to fix the part of the acid addition pipe 1 that extends into the reactor, thereby solving the problem that the acid addition pipe 1 has a short service life due to fatigue damage caused by shaking during the acid addition process.

[0064] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Any other corresponding changes and modifications made based on the technical concept of this application should be included within the scope of protection of the claims of this application.

Claims

1. An acid-adding device, applied to a high-pressure reactor, wherein the high-pressure reactor has an acid-adding hole on its side wall, characterized in that, include: An acid-adding tube, one end of which extends into the high-pressure reactor through the acid-adding hole, is rotatably arranged along its own axis; A connecting component is located in the middle of the acid addition tube, and the connecting component is sealed to the end face of the acid addition hole; Multiple abutting members are arranged at intervals along the circumference of the acid adding tube, and the abutting members are movably arranged in the radial direction of the acid adding tube. When the abutting members move away from the acid adding tube, the abutting members abut against the side wall of the acid adding hole to fix the acid adding tube. A transmission assembly connects the abutment to the acid-adding tube and acts to drive the abutment to move radially along the acid-adding tube through the rotation of the acid-adding tube.

2. The acid addition device according to claim 1, characterized in that, The transmission assembly includes a mounting sleeve and a connecting sleeve. The mounting sleeve is rotatably fitted onto the acid-adding pipe, and the abutment is radially movably mounted on the mounting sleeve. The connecting sleeve is axially movably fitted onto the acid-adding pipe and is drively connected to the acid-adding pipe so that the rotation of the acid-adding pipe drives the connecting sleeve to move axially. The connecting sleeve is connected to a plurality of the abutment members so that the axial movement of the connecting sleeve drives the abutment members to move radially.

3. The acid addition device according to claim 2, characterized in that, The abutment member is provided with an elongated hole; The transmission assembly also includes a plurality of scissor mechanisms corresponding one-to-one with the plurality of abutment members. Each scissor mechanism includes a first connecting rod and a second connecting rod. The two ends of the first connecting rod are rotatably connected to the connecting sleeve and the abutment member, respectively. One end of the second connecting rod is rotatably connected to the mounting sleeve. The other end of the second connecting rod is slidably and rotatably installed in the elongated hole. The middle parts of the first connecting rod and the middle parts of the second connecting rod are rotatably connected.

4. The acid addition device according to claim 2, characterized in that, The connecting sleeve has an internal thread, and the acid adding pipe has an external thread. The connecting sleeve is threadedly connected to the acid adding pipe.

5. The acid addition device according to claim 2, characterized in that, The inner wall of the acid addition hole is provided with a first limiting groove; The mounting sleeve has a first limiting protrusion on its outer periphery. When the acid tube rotates, the first limiting protrusion cooperates with the first limiting groove to limit the rotation of the mounting sleeve.

6. The acid addition device according to claim 1, characterized in that, The abutment has an anti-slip structure on the side facing the acid filling hole sidewall.

7. The acid addition device according to claim 1, characterized in that, The side of the abutment facing the acid filling hole is arc-shaped.

8. The acid addition device according to claim 1, characterized in that, The connecting assembly includes a first sealing ring and a first flange. The first sealing ring is installed on the outer periphery of the acid filling pipe and is used to seal with the end face of the acid filling hole. The first flange is sleeved on the outer periphery of the acid filling pipe and is located above the first sealing ring. The first flange is used to connect with the end face flange of the acid filling hole.

9. The acid addition device according to claim 8, characterized in that, The acid addition tube is provided with a second limiting protrusion on its outer periphery, and the second limiting protrusion is located above the first sealing ring; The first flange has a second limiting groove at the through hole in the middle. The second limiting groove and the second limiting protrusion cooperate to limit the rotation of the first flange and the acid adding pipe.

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

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