Bottom discharging device of leaching container autoclave

Abstract

The utility model belongs to the technical field of hydrometallurgy, and discloses a bottom discharging device of a leaching container autoclave, which comprises a main shaft, a discharging hopper, a support frame and an operating handle. The discharging hopper comprises a material cavity and a discharging pipe, the upper end of the material cavity is open, the lower end of the material cavity is provided with a lower flange, the supporting frame comprises a connecting flange and a connecting sleeve, the upper portion of the material cavity is connected with the bottom of the autoclave in a welded mode, and the lower flange is connected with the connecting flange through the connecting sleeve of the supporting frame. The operating handle is arranged on the lower portion of the spindle. The main shaft is driven to rotate up and down through rotation of the operating handle, sealing and discharging of the autoclave are achieved, the sealing performance is good, it can be guaranteed that the pressure in the autoclave is stable in the high-temperature and high-pressure environment, a material flow path in the autoclave is smooth and free of interruption during discharging, discharging is thorough, washing is convenient, operation is easy, and safety and reliability are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of hydrometallurgy, and relates to a leaching container, in particular to a bottom discharging device of a leaching container pressure vessel. BACKGROUND

[0002] The pressure vessel is a common pressure leaching container for difficult-to-treat materials in the field of hydrometallurgy, and is commonly used for pressure leaching of difficult-to-treat solid materials. The pressure leaching material in the pressure vessel is discharged in a micro-positive pressure discharge method, a micro-negative pressure discharge method or an atmospheric pressure discharge method. The atmospheric pressure discharge method commonly uses a discharge bottom valve or a siphon method for discharging. The discharge methods for discharging the leaching material in the micro-positive pressure, micro-negative pressure or siphon manner have the following shortcomings: 1. Since the reactor vessel has an upward opening, the leaching solution in the vessel cannot be completely discharged regardless of the micro-positive pressure, micro-negative pressure or siphon method, and residues are left, which affects the leaching efficiency and effect; 2. The pressure vessel is inconvenient to discharge and clean. The existing pressure vessel uses a discharge bottom valve: a flow guide pipe with a flange is welded to the discharge hole in the lower part of the pressure vessel, a ball valve is used as the discharge bottom valve, the flange of the ball valve is connected to the flange of the flow guide pipe by bolts, and the sealing and discharge of the pressure vessel are realized by relying on the ball valve. This discharge method puts higher requirements on the pressure resistance and sealing performance of the ball valve. Meanwhile, during the pressure leaching operation, solid particles will deposit in the discharge hole and flow guide pipe at the bottom of the pressure vessel to form dead angles, which will be hardened and accumulated under the action of high temperature and high pressure, causing the discharge to be not smooth, and even causing the pressure vessel to be blocked, so that the leaching material cannot be discharged. In addition, the solid particles adhered to the surface of the ball valve cannot be completely washed, the pressure vessel is difficult to seal tightly, and it is difficult to maintain and increase the pressure, which affects the efficiency and quality of the pressure leaching operation. CONTENT OF THE UTILITY MODEL

[0003] In view of the deficiencies in the prior art, the utility model provides a bottom discharging device of a leaching container pressure vessel to solve the technical problems of inconvenient discharge and cleaning operation, incomplete cleaning, not smooth discharge, tight sealing of the pressure vessel, difficulty in maintaining and increasing the pressure, and the influence on the efficiency and quality of the pressure leaching operation in the prior art.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The application discloses a bottom discharging device of a pressure tank of a leaching container, which comprises a main shaft, a discharging hopper, a supporting frame and an operating handle.

[0006] The main shaft is vertically connected to the center of the supporting frame, and the main shaft is in transmission connection with the adjusting nut seat through the trapezoidal thread.

[0007] Further, the diameter of the main shaft is 2-3 mm larger than the diameter of the discharging hole of the bottom of the pressure tank, the upper portion of the main shaft is a variable-diameter cylinder, the height of the variable-diameter cylinder is 2-3 mm higher than the wall thickness of the discharging hole of the bottom of the pressure tank, the outer surface of the upper portion of the variable-diameter cylinder is provided with a pressing thread, the variable-diameter cylinder is provided with an upper sealing body, and the upper sealing body is provided with a sealing pressing nut matched with the pressing thread.

[0008] Further, the lower portion of the sealing pressing nut of the upper sealing body is provided with an upper pressing ring, the inner diameter of the upper pressing ring is the same as the outer diameter of the variable-diameter cylinder, the outer diameter of the upper pressing ring is the same as the outer diameter of the sealing pressing nut, and the lower portion of the upper pressing ring is provided with a plurality of upper sealing ring pads penetrating through the variable-diameter cylinder.

[0009] Further, the lower sealing body is arranged at the middle portion of the main shaft, the sealing gland of the lower sealing body is in a convex structure and is provided with a hole in the middle, the main shaft penetrates through the middle hole of the sealing gland and the middle hole of the lower flange of the discharging hopper, and the main shaft is in gap fit with the sealing gland, the lower pressing ring of the lower sealing body is arranged at the upper portion of the sealing gland, the inner diameter of the lower pressing ring is the same as the diameter of the main shaft, the lower pressing ring is provided with a plurality of lower sealing ring pads penetrating through the main shaft, the inner diameter of the lower sealing ring pad is the same as the main shaft, the outer diameter of the lower sealing ring pad is 2-3 mm larger than the outer diameter of the lower pressing ring, and the lower sealing body is connected with the lower flange of the discharging hopper through bolts.

[0010] Further, the outer surface of the middle and lower part of the main shaft is tapped with trapezoidal thread, and an adjusting nut seat matched with the trapezoidal thread is arranged on the connecting flange of the supporting frame, and the positioning nut is arranged on the upper part of the trapezoidal thread, and the connecting flange is bolted with the lower flange of the discharge hopper through the connecting sleeve.

[0011] Further, the material cavity of the discharge hopper is an irregular polyhedron, and the discharge pipe is arranged on the lower part of the side surface of the material cavity.

[0012] Further, the vertical angle between the discharge pipe and the main shaft is 45-60°.

[0013] Further, the material of the upper sealing ring pad and the lower sealing ring pad is polytetrafluoroethylene.

[0014] Further, the material of the main shaft and the discharge hopper is titanium.

[0015] Compared with the prior art, the beneficial technical effects of the utility model are:

[0016] (1) In the technical scheme, the sealing of the discharge hole at the bottom of the pressure kettle is realized by rotating the operation handle to make the upper sealing body. The operation handle is counterclockwise rotated, the sealing compression nut of the upper sealing body, the upper compression ring and the discharge hole at the bottom of the pressure kettle form a gap fit, the upper sealing ring pad of the upper sealing body is in contact with the bottom of the pressure kettle and is compressed, and the sealing is realized. When the sealing, the top end of the sealing compression nut of the upper sealing body is flush with the upper end of the discharge hole at the bottom of the pressure kettle, which avoids that the solid particles are deposited in the discharge hole and the flow guide pipe at the bottom of the pressure kettle to form a dead angle, which is consolidated and accumulated under the action of high temperature and high pressure, which causes the discharge to be not smooth, and even the discharge pipe of the pressure kettle is blocked to make the leaching material not discharged, which ensures the smoothness of the discharge flow path of the pressure kettle, the flow is not interrupted, and the discharge is complete.

[0017] (2) In the technical scheme, the trapezoidal thread arranged on the main shaft is matched with the adjusting nut seat embedded in the connecting flange of the supporting frame, the screw rod of the trapezoidal thread of the main shaft is linearly matched with the nut of the adjusting nut seat, the match is close without sliding, the self-locking function is limited, the sliding of the main shaft of the discharge device is prevented when the operation handle is not in action, the pressure kettle is ensured to be not leaked, the pressure of the pressure kettle is realized, and the pressure is maintained.

[0018] (3) In the technical scheme, the main shaft is provided with a positioning nut, when the positioning nut contacts with the sealing gland, the operation handle is counterclockwise rotated to reach the upper limit, the top end of the sealing compression nut of the upper sealing body is flush with the upper end of the discharge hole of the bottom of the pressure vessel, so that a dead angle space is formed between the two, and there is no space for solid particles to gather, so that the sealing compression nut is prevented from protruding or sinking in the discharge hole of the bottom of the pressure vessel, and the discharge is not smooth due to the accumulation of materials. The top end of the sealing compression nut is flush with the upper end of the discharge hole of the bottom of the pressure vessel, which is realized by reducing (sinking) or increasing (protruding) the number of upper sealing ring pads. When the positioning nut contacts with the upper end of the adjusting screw nut seat, the operation handle is clockwise rotated to reach the lower limit, so that the upper sealing body is prevented from being separated from the lower flange hole of the discharge hopper, and the material in the material cavity is prevented from leaking.

[0019] (4) In the technical scheme, the material cavity of the discharge hopper is an irregular polyhedron, the lower part of the side surface is provided with a discharge pipe, and the vertical included angle between the discharge pipe and the main shaft is 45-60°, so that the discharge of the material in the pressure vessel is without splashing and spilling, and the discharge flow path is smooth. At the same time, the upper sealing body is convenient to flush, the solid particles adhered to the outer surface of the upper sealing body are cleaned, the sealing of the discharge hole of the bottom of the pressure vessel is ensured to be leakproof, and the pressure increasing and pressure maintaining of the pressure vessel are realized.

[0020] (5) In the technical scheme, the operation handle is arranged, the operation is simple and convenient, the operation handle is counterclockwise rotated to realize the sealing of the discharge hole of the bottom of the pressure vessel, and the operation handle is clockwise rotated to realize the discharge of the pressure vessel.

[0021] The utility model provides a kind of bottom discharge device of leaching container pressure vessel, solve the technical problems of the prior art in pressure vessel discharge, cleaning operation is not convenient, cleaning is not thorough, discharge is not smooth, pressure vessel is not tightly sealed, it is difficult to maintain pressure, pressure increasing, affect the efficiency and quality of pressure leaching operation.The utility model structure is simple, easy to operate, convenient to install, good sealing, can maintain the high pressure, stable pressure environment in pressure vessel during pressure leaching operation, ensure the efficient operation of pressure leaching operation;When it is necessary to clean the discharging device, relevant components can be conveniently disassembled, to achieve better cleaning effect. DRAWINGS

[0022] Fig. 1 It is the overall structure schematic diagram of the utility model;

[0023] Fig. 2 It is the overall structure schematic diagram of the utility model;

[0024] Fig. 3 It is the upper sealing body local amplification structure schematic diagram of the utility model;

[0025] Fig. 4 It is the lower sealing body local amplification structure schematic diagram of the utility model;

[0026] In the figure: 1-main shaft, 101-upper sealing body, 1011-sealing compression nut, 1012-upper compression ring, 1013-upper sealing ring pad, 102-lower sealing body, 1021-sealing gland, 1022-lower compression ring, 1023-lower sealing ring pad, 103-trapezoidal thread, 104-adjusting nut seat, 105-variable diameter cylinder, 1051-compression thread, 106-positioning nut;

[0027] 2-discharge hopper, 201-chamber, 202-discharge pipe, 203-lower flange;

[0028] 3-support frame, 301-connection flange, 302-connection sleeve;

[0029] 4-handle;

[0030] 5-pressurized kettle. DETAILED DESCRIPTION

[0031] The utility model will be explained further in detail in connection with the drawings and specific embodiments.

[0032] As Figs. 1 to 4 shown, the utility model discloses a kind of bottom discharge devices of leaching container pressurized kettle, including main shaft 1, discharge hopper 2, support frame 3, handle 4.The main shaft 1 is provided with upper sealing body 101, lower sealing body 102, trapezoidal thread 103, adjusting nut seat 104, variable diameter cylinder 105, positioning nut 106, upper sealing body 101 includes sealing compression nut 1011, upper compression ring 1012, upper sealing ring pad 1013, lower sealing body 102 includes sealing gland 1021, lower compression ring 1022, lower sealing ring pad 1023, discharge hopper 2 includes chamber 201, discharge pipe 202, chamber 201 upper end opening, lower end is equipped with lower flange 203, support frame 3 includes connection flange 301, connection sleeve 302, chamber 201 upper end opening is welded and connected with pressurized kettle 5 bottom, lower flange 203 is connected with connection flange 301 by the connection sleeve 302 of support frame 3, connection flange 301 is embedded with adjusting nut seat 104 matched with the trapezoidal thread 103 of main shaft 1, main shaft 1 is connected as a whole by trapezoidal thread 103 with adjusting nut seat 104, handle 4 is set in the lower part of main shaft 1.

[0033] Specifically, the diameter of the main shaft 1 is 2-3mm larger than the diameter of the discharge hole of the bottom of the pressure kettle 5, the upper part of the main shaft 1 is a variable diameter cylinder 105 with a pin, and the height of the variable diameter cylinder 105 is 2-3mm higher than the wall thickness of the discharge hole of the bottom of the pressure kettle 5, the outer surface of the upper part of the variable diameter cylinder 105 is provided with a pressing thread 1051 around the periphery, the upper sealing body 101 is arranged on the variable diameter cylinder 105, and the upper sealing body 101 is provided with a sealing pressing nut 1011 matched with the pressing thread 1051, the sealing pressing nut 1011 is in the shape of U, the outer diameter of the sealing pressing nut 1011 is the same as the diameter of the discharge hole of the bottom of the pressure kettle 5, and the two are in clearance fit.

[0034] Specifically, the upper pressing ring 1012 of the upper sealing body 101 is arranged at the lower part of the sealing pressing nut 1011, the inner diameter of the upper pressing ring 1012 is the same as the outer diameter of the variable diameter cylinder 105, and the two are in clearance fit, the outer diameter of the upper pressing ring 1012 is the same as the outer diameter of the sealing pressing nut 1011, and the lower part of the upper pressing ring 1012 is provided with a plurality of upper sealing ring pads 1013 penetrating through the variable diameter cylinder 105, the inner diameter of the upper sealing ring pad 1013 is the same as the outer diameter of the variable diameter cylinder 105, and the outer diameter of the upper sealing ring pad 1013 is the same as the diameter of the main shaft 1.

[0035] Specifically, the lower sealing body 102 is arranged at the middle part of the main shaft 1, the sealing gland 1021 thereof is in convex structure, a hole is arranged in the middle, the main shaft 1 penetrates through the hole of the sealing gland 1021 and the middle hole of the lower flange 203 of the material cavity 2, and the two are in clearance fit. The lower pressing ring 1022 of the lower sealing body 102 is arranged at the upper part of the sealing gland 1021, the inner diameter of the lower pressing ring 1022 is the same as the diameter of the main shaft 1, a plurality of lower sealing ring pads 1023 penetrating through the main shaft 1 are arranged above and below the lower pressing ring 1022, the inner diameter of the lower sealing ring pad 1023 is the same as the main shaft 1, the outer diameter of the lower sealing ring pad 1023 is 2-3mm larger than the outer diameter of the lower pressing ring 1022, and the lower sealing body 102 is connected with the lower flange 203 of the material cavity 2 through bolts.

[0036] Specifically, the outer surface of the middle and lower part of the main shaft 1 is provided with a trapezoidal thread 103, and an adjusting nut seat 104 matched therewith is arranged thereon, the adjusting nut seat 104 is embedded on the connecting flange 301 of the support frame 3, a positioning nut 106 is arranged at the upper part of the trapezoidal thread 103, and the connecting flange 301 is bolted with the lower flange 203 of the material cavity 2 through a connecting sleeve 302.

[0037] Specifically, the material cavity 201 of the discharge hopper 2 is an irregular polyhedron, and the side surface thereof is provided with a discharge pipe 202 at the lower part, and the discharge pipe 202 is threadedly connected with the material cavity 201.

[0038] Specifically, the vertical included angle between the discharge pipe 202 and the main shaft 1 is 45-60°.

[0039] Specifically, the material of the upper sealing ring pad 1013 and the lower sealing ring pad 1023 is polytetrafluoroethylene.

[0040] Specifically, the material of the main shaft 1 and the discharge hopper 2 is titanium.

[0041] In the above technical solution, the upper end of the material cavity 201 of the discharge hopper 2 is welded and connected with the bottom of the pressure kettle 5, the lower flange 203 of the discharge hopper 2 is connected with the connecting flange 301 through the connecting sleeve 302 of the support frame 3, the adjusting nut seat 104 matched with the trapezoidal thread 103 of the main shaft 1 is embedded on the connecting flange 301, and the main shaft 1 is integrated with the adjusting nut seat 104 through the trapezoidal thread 103. A certain number of upper sealing ring pads 1013 are arranged on the lower part of the variable diameter cylinder 105 of the main shaft 1, the upper compression ring 1012 is arranged, the sealing compression nut 1011 is tightened, and the upper compression ring 1012 is compressed to the upper sealing ring pad 1013. The sealing of the discharge hole (not marked in the figure) at the bottom of the pressure kettle 5 is realized by the rotation of the operating handle 4. When the pressure kettle 5 is ready to discharge, the operating handle 4 is rotated counterclockwise, the main shaft 1 moves upward under the cooperation of the trapezoidal thread 103 and the adjusting nut seat 104, the upper end of the main shaft 1 enters the discharge hole at the bottom of the pressure kettle 5, and when the positioning nut 106 is in contact with the sealing compression cover 1021 and is tightened, the rotation of the operating handle 4 is stopped. At this time, a gap is formed between the sealing compression nut 1011, the upper compression ring 1012 of the upper sealing body 101 and the discharge hole at the bottom of the pressure kettle 5, the upper sealing ring pad 1013 of the upper sealing body 101 is in contact with the bottom of the pressure kettle 5 and is compressed, and sealing is realized. When sealing, the top end of the sealing compression nut 1011 of the upper sealing body 101 is flush with the upper end of the discharge hole at the bottom of the pressure kettle 5, which avoids the deposition of solid particles in the discharge hole at the bottom of the pressure kettle 5 to form a dead angle, which is hardened and accumulated under the action of high temperature and high pressure, causing the discharge to be not smooth, and even causing the discharge hole of the pressure kettle 5 to be blocked, so that the leaching material cannot be discharged, which ensures the smoothness of the discharge flow path of the pressure kettle 5, the flow is uninterrupted, and the discharge is complete.

[0042] In the above technical solution, the sealing of the lower part of the material cavity of the discharge hopper is realized by the lower sealing body. The middle hole of the lower flange of the discharge hopper, the middle hole of the sealing compression cover of the lower sealing body, and the lower sealing body are gap-fitted. The connecting bolts between the sealing compression cover of the lower sealing body and the lower flange of the discharge hopper are tightened, the lower compression ring of the lower sealing body and the lower sealing ring pads above and below it are compressed, and the sealing of the lower part of the material cavity of the discharge hopper is realized.

[0043] In the above technical solution, the material cavity 201 of the discharge hopper 2 is an irregular polyhedron, the lower part of the side surface is provided with a discharge pipe 202, the vertical angle between the discharge pipe 202 and the main shaft 1 is 45-60°, which is convenient for the discharge of the material in the pressure kettle 5 without splashing, without spilling, and the smoothness of the discharge flow path. At the same time, it is convenient to flush the upper sealing body 101, flush the solid particles adhered to the outer surface of the upper sealing body 101, ensure the sealing of the discharge hole at the bottom of the pressure kettle 5 without leakage, and realize the pressure increase and pressure maintenance of the pressure kettle 5. When the pressure kettle 5 is discharging, the operating handle 4 is rotated clockwise, the main shaft 1 moves downward under the cooperation of the trapezoidal thread 103 and the adjusting nut seat 104, the upper end of the main shaft 1 exits the discharge hole at the bottom of the pressure kettle 5, and as the operating handle 4 continues to rotate, when the sealing compression nut 1011 of the upper sealing body 101 completely separates from the discharge hole at the bottom of the pressure kettle 5, the material in the pressure kettle 5 flows into the material cavity 201 of the discharge hopper 2 from the discharge hole at the bottom of the pressure kettle 5, and the material is discharged through the discharge pipe 202.

[0044] In the above technical solution, the trapezoidal thread 103 provided on the main shaft 1 matches the adjusting nut seat 104 embedded on the connecting flange 301 of the support frame 3. Since the screw rod of the trapezoidal thread 103 of the main shaft 1 and the nut of the adjusting nut seat 104 are linearly matched, the match is tight without sliding, has a limit self-locking function, prevents the sliding of the main shaft 1 when the operating handle 4 is not in action, ensures the pressure kettle 5 without leakage, and realizes the pressure increase and pressure maintenance of the pressure kettle 5.

[0045] In the above technical solution, the main shaft 1 is provided with a positioning nut 106, when the positioning nut 106 contacts with the sealing gland 1021, the operating handle 4 is rotated counterclockwise to reach the upper limit, which ensures that the top end of the sealing compression nut 1011 of the upper sealing body 101 is flush with the upper end of the discharge hole at the bottom of the pressure kettle 5, so that a dead angle space is formed between them, and there is no space for solid particles to gather, which prevents the sealing compression nut 1011 from protruding or sinking in the discharge hole at the bottom of the pressure kettle 5, causing material accumulation and making the discharge difficult. The top end of the sealing compression nut 1011 flush with the upper end of the discharge hole at the bottom of the pressure kettle 5 is realized by reducing (sinking) or increasing (protruding) the number of upper sealing ring pads 1013. When the positioning nut 106 contacts with the upper end of the adjusting nut seat 104, the operating handle 4 is rotated clockwise to reach the lower limit, which prevents the upper sealing body 101 from being pulled out of the hole of the lower flange 203 of the discharge hopper 2, causing the material in the material cavity 201 to leak.

[0046] In the above technical solution, the operating handle 4 is provided, which is simple and convenient to operate, the operating handle 4 is rotated counterclockwise to realize the sealing of the discharge hole at the bottom of the pressure kettle 5, and the operating handle 4 is rotated clockwise to realize the discharge of the material in the pressure kettle 5.

[0047] The utility model provides a kind of bottom discharging device of leaching container pressurized kettle, solve the technical problem that the pressurized kettle discharging, cleaning operation is inconvenient, cleaning is not thorough, discharging is not smooth, pressurized kettle is not tightly sealed, it is difficult to keep pressure, pressurization, affect the efficiency and quality of pressurized leaching operation.The utility model structure is simple, easy to operate, easy to install, good sealing, can maintain the high pressure, stable pressure environment in kettle when pressurized leaching operation of pressurized kettle, ensure the efficient operation of pressurized leaching operation;When needing to clean discharging device, relevant components can be conveniently disassembled, to achieve better cleaning effect.

Claims

1. A bottom discharge apparatus for a pressure vessel of a leaching vessel, characterized by, It comprises a main shaft (1), a discharge hopper (2), a support frame (3) and an operating handle (4); The discharge hopper (2) is connected below the discharge hole of the pressure kettle (5), and the material in the pressure kettle enters the discharge hopper (2) first and is then discharged through the discharge hopper (2); the discharge hopper (2) comprises a material cavity (201) and a discharge pipe (202), the upper end of the material cavity (201) is open, the lower end is provided with a lower flange (203), and the upper edge of the material cavity (201) is welded and fixed with the bottom of the pressure kettle. The support frame (3) is connected below the discharge hopper (2) and is used for providing support for the main shaft (1); it comprises vertically arranged connecting sleeve pipes (302) on both sides, the bottom of the connecting sleeve pipes (302) is fixed with a connecting flange (301), and the center of the connecting flange (301) is embedded with an adjusting nut seat (104), The main shaft (1) is vertically connected with the center of the support frame (3), the main shaft (1) is in transmission connection with the adjusting nut seat (104) through a trapezoidal thread (103), the upper end of the main shaft (1) penetrates into the material cavity (201) and abuts against the discharge hole of the pressure kettle (5) to block the discharge hole, and the lower end of the main shaft (1) is connected with the operating handle (4).

2. The bottom discharge apparatus of a pressure vessel for leaching containers according to claim 1, characterized in that, The main shaft (1) is provided with an upper sealing body (101), a lower sealing body (102), a trapezoidal thread (103), an adjusting nut seat (104), a variable-diameter cylinder (105), a positioning nut (106), the upper sealing body (101) comprises a sealing compression nut (1011), an upper compression ring (1012) and an upper sealing ring pad (1013), and the lower sealing body (102) comprises a sealing gland (1021), a lower compression ring (1022) and a lower sealing ring pad (1023).

3. The bottom discharge apparatus of a pressure vessel for leaching containers according to claim 2, characterized in that, The diameter of the main shaft (1) is 2-3 mm larger than the hole diameter of the discharge hole of the bottom of the pressure kettle (5), the upper part of the main shaft (1) is a variable-diameter cylinder (105) of a turning pin, the height of the variable-diameter cylinder (105) is 2-3 mm higher than the wall thickness of the discharge hole of the bottom of the pressure kettle (5), the outer surface of the upper part of the variable-diameter cylinder (105) is provided with a compression thread (1051) of a turning pin, the variable-diameter cylinder (105) is provided with an upper sealing body (101), the upper sealing body (101) is provided with a sealing compression nut (1011) matched with the compression thread (1051), the sealing compression nut (1011) is in the shape of U, the outer diameter of the sealing compression nut (1011) is the same as the diameter of the discharge hole of the bottom of the pressure kettle (5), and the two are in clearance fit.

4. The bottom discharge apparatus of a pressure vessel for leaching containers according to claim 3, characterized in that, The lower part of the sealing compression nut (1011) of the upper sealing body (101) is provided with an upper compression ring (1012), the inner diameter of the upper compression ring (1012) is the same as the outer diameter of the variable-diameter cylinder (105), the two are in clearance fit, the outer diameter of the upper compression ring (1012) is the same as the outer diameter of the sealing compression nut (1011), and the lower part of the upper compression ring (1012) is provided with a plurality of upper sealing ring pads (1013) penetrating through the variable-diameter cylinder (105), the inner diameter of the upper sealing ring pad (1013) is the same as the outer diameter of the variable-diameter cylinder (105), and the outer diameter of the upper sealing ring pad (1013) is the same as the diameter of the main shaft (1).

5. The bottom discharge apparatus of a pressure vessel for leaching containers according to claim 4, characterized in that, The lower sealing body (102) is arranged in the middle part of the main shaft (1), the sealing gland (1021) of which is in convex structure and has a hole in the middle part, the main shaft (1) passes through the middle hole of the sealing gland (1021) and the middle hole of the lower flange (203) of the discharge hopper (2), and the two are in clearance fit, the lower pressing ring (1022) of the lower sealing body (102) is arranged on the upper part of the sealing gland (1021), the inner diameter of the lower pressing ring (1022) is the same as the diameter of the main shaft (1), a plurality of lower sealing ring pads (1023) passing through the main shaft (1) are arranged on the upper and lower parts of the lower pressing ring (1022), the inner diameter of the lower sealing ring pad (1023) is the same as the main shaft (1), and the outer diameter of the lower sealing ring pad (1023) is 2-3mm larger than the outer diameter of the lower pressing ring (1022), and the lower sealing body (102) is connected with the lower flange (203) of the discharge hopper (2) through bolts.

6. The bottom discharge apparatus of a pressure vessel for leaching containers according to claim 5, characterized in that, The outer surface of the middle lower part of the main shaft (1) is provided with trapezoidal threads (103), and an adjusting nut seat (104) matched with the trapezoidal threads (103) is arranged on the outer surface, the adjusting nut seat (104) is embedded on the connecting flange (301) of the support frame (3), a positioning nut (106) is arranged on the upper part of the trapezoidal threads (103), and the connecting flange (301) is bolted with the lower flange (203) of the discharge hopper (2) through a connecting sleeve (302).

7. The bottom discharge apparatus of a pressure vessel for leaching containers according to claim 1, characterized in that, The material cavity (201) of the discharge hopper (2) is a polyhedron, and the side surface of the lower part of the material cavity (201) is provided with a discharge pipe (202), and the discharge pipe (202) is threadedly connected with the material cavity (201).

8. The bottom discharge apparatus of a pressure vessel for leaching containers according to claim 7, characterized in that, The vertical included angle between the discharge pipe (202) and the main shaft (1) is 45-60°.

9. The bottom discharge apparatus of a pressure vessel for leaching containers according to claim 2, characterized in that, The material of the upper sealing ring pad (1013) and the lower sealing ring pad (1023) is polytetrafluoroethylene.

10. The bottom discharge apparatus of a pressure vessel for leaching containers according to claim 1, characterized in that, The material of the main shaft (1) and the discharge hopper (2) is titanium.

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