CN216946910U

CN216946910U - Vacuum leaching tank

Info

Publication number: CN216946910U
Application number: CN202220076634.5U
Authority: CN
Inventors: 黄亮; 林仁斌; 何光赞; 高胜; 张云祥; 赵永军; 费麒
Original assignee: Sichuan Jieneng Drying Equipment Co ltd
Current assignee: Sichuan Jieneng Drying Equipment Co ltd
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2022-07-12
Anticipated expiration: 2032-01-12

Abstract

The utility model belongs to the field of separation equipment, and particularly relates to a vacuum leaching tank. The specific technical scheme is as follows: the oil tank comprises a tank body and an inner frame sleeved in the tank body, wherein a plurality of through holes are formed in the circumferential side wall of the inner frame, a cavity is formed between the inner frame and the tank body, and a heat conduction oil pipe is arranged in the cavity and at the bottom of the tank body; and a support ring is arranged on the periphery of the tank body, and the support ring is connected with a turnover mechanism for dumping the tank body. The inner frame is sleeved in the tank body and rotates along with the rotating mechanism, so that the leaching process and the centrifugal separation process are completed in the same tank body, equipment is simplified, and cost is reduced.

Description

Vacuum leaching tank

Technical Field

The utility model belongs to the field of separation equipment, and particularly relates to a vacuum leaching tank.

Background

The common process for producing the zanthoxylum oil is an extraction process, which comprises the steps of mixing fresh zanthoxylum and oil, then extracting for a period of time at 160-180 ℃, and then centrifuging and separating the zanthoxylum oil.

The leaching process needs to use equipment such as a spiral leaching tank and a centrifugal separator, and needs to use a plurality of pieces of equipment, so that the production cost and the equipment maintenance cost are increased. The extraction temperature of the spiral extraction tank is generally higher than 160 ℃, and the amide substances and volatile oil substances in the zanthoxylum oil are easily decomposed at the temperature, so that the flavor of the zanthoxylum oil is influenced. The main reason is that the flavor substances of the pepper mainly comprise spicy ingredients and fragrant ingredients, the spicy ingredients mainly comprise amide substances represented by sanshool, and the fragrant ingredients mainly comprise volatile oil substances of the pepper, mainly comprising olefin compounds and hydrocarbon oxygen-containing compounds. Therefore, an extraction device capable of ensuring the flavor of the zanthoxylum oil and reducing the cost is needed.

SUMMERY OF THE UTILITY MODEL

To solve the problems in the background art, the utility model aims to provide a vacuum leaching tank.

In order to realize the purpose of the utility model, the technical proposal adopted by the utility model is as follows: a vacuum leaching tank comprises a tank body and an inner frame sleeved in the tank body, wherein a plurality of through holes are formed in the circumferential side wall of the inner frame, a cavity is formed between the inner frame and the tank body, and a heat-conducting oil pipe is arranged in the cavity and at the bottom of the tank body; and a support ring is arranged on the periphery of the tank body, and the support ring is connected with a turnover mechanism for dumping the tank body.

Preferably, the following components: the inlet end and the outlet end of the heat-conducting oil pipe are integrally arranged on the sleeve, the sleeve comprises an outer pipe and an inner pipe sleeved in the outer pipe, the outer pipe is used for the inlet end of the heat-conducting oil pipe, and the inner pipe is used for the outlet end of the heat-conducting oil pipe; or the inner pipe is used for the inlet end of the heat-conducting oil pipe, and the outer pipe is used for the outlet end of the heat-conducting oil pipe.

Preferably: the material pipe is symmetrically arranged on the supporting ring, the sleeve is arranged on the supporting ring, the turnover mechanism comprises a second cylinder, a cylinder hinge joint of the second cylinder is hinged with a driving chain wheel, the driving chain wheel is connected with a driven chain wheel through a chain, and the driven chain wheel is fixedly connected with the material pipe or the sleeve.

Preferably: the cylinder hinged joint is hinged with the side face of the driving chain wheel through an eccentric hinged shaft, the material pipe penetrates through the driven chain wheel and is connected with the shaft sleeve seat, the shaft sleeve seat is installed at the top of the rack base through a supporting seat, and the rack base is used for supporting the tank body.

Preferably: the transmission ratio of the driving chain wheel to the driven chain wheel is 2: 3.

Preferably: the upper part of the tank body is provided with a tank body upper cover which is driven by a lifting mechanism to open and close, the tank body upper cover comprises an upper cover body and an upper cover edge plate arranged at the lower end of the upper cover body, and the upper cover edge plate is arranged to protrude out of the lower end of the upper cover body; the lifting mechanism comprises a first air cylinder, and the output end of the first air cylinder is connected with the upper cover edge plate.

Preferably: the tank body side is provided with a lifting support, the lifting support is provided with a connecting rod in an up-and-down sliding mode, and the connecting rod is connected with the output end of the first air cylinder.

Preferably: the tank body bottom is provided with locking mechanical system, locking mechanical system includes the third cylinder, the third cylinder piston rod is connected with lock jar round pin axle, the tank body bottom is provided with spacing base, be provided with the lock jar sleeve pipe on the spacing base, lock jar round pin axle penetrates the lock jar sleeve pipe under the third cylinder promotes.

Preferably: a transmission pressure plate driven by the rotating mechanism is arranged at the top end of the inner frame, and the upper cover body is arranged above the transmission pressure plate; the rotating mechanism comprises a motor arranged above the upper cover body, an output shaft of the motor is connected with a transmission shaft through a coupler, and the other end of the transmission shaft penetrates through the upper cover body downwards to be fixedly connected with a transmission pressing plate.

Preferably: and a buffer spring is arranged between the tank body upper cover and the transmission pressing plate, and the buffer spring is sleeved on the periphery of the transmission shaft.

The utility model has the following beneficial effects: according to the utility model, the tank body is connected with the vacuum pump to provide a vacuum environment in the tank, the boiling point of water in the tank is reduced along with the reduction of the negative pressure, so that the water in the zanthoxylum oil can be removed when the temperature in the tank is lower than the conventional process temperature. The inner frame is sleeved in the tank body and rotates along with the rotating mechanism, so that the leaching process and the centrifugal separation process are completed in the same tank body, equipment is simplified, and cost is reduced.

Drawings

FIG. 1 is a schematic overall structure of the present invention (a sectional view of a tank structure);

FIG. 2 is a right-side view of the overall structure of the present invention (with the upper lid of the can body closed);

FIG. 3 is a right-side view of the overall structure of the present invention (with the lid of the can body open);

FIG. 4 is a schematic view of the lid and rotating mechanism of the can body of the present invention (with the rotating mechanism in section);

FIG. 5 is a schematic view of the turnover mechanism of the present invention;

FIG. 6 is a schematic front and top view of the locking mechanism of the present invention;

FIG. 7 is a schematic view of a heat transfer oil tube according to the present invention;

FIG. 8 is a schematic view of a can body structure of the present invention;

FIG. 9 is a schematic view of the overall structure of the present invention in a flip-over dumping mode;

fig. 10 is a schematic diagram of the overall structure of the present invention in a tilted-down position.

In the drawings, the reference numbers: a frame base 1, a tank body 2, a tank body upper cover 3, a transmission pressure plate 4, an inner frame 5, a cavity 6, a through hole 7, a heat conduction oil pipe 8, a sleeve 9, an inner pipe 10, an outer pipe 11, a first air cylinder 12, an upper cover body 13, an upper cover edge plate 14, an upper cover sealing plate 15, a vacuum joint 16, a lifting support 17, a connecting rod 18, a motor 19, a motor seat 20, a coupling 21, a transmission shaft 22, a plane bearing 23 and a roller bearing 24, the mechanical seal 25, the buffer spring 26, the support ring 27, the material pipe 28, the second air cylinder 29, the air cylinder hinge joint 30, the driving sprocket 31, the chain 32, the driven sprocket 33, the shaft sleeve seat 34, the air cylinder base 35, the bearing seat 36, the bearing mounting seat 37, the third air cylinder 38, the tank locking pin 39, the tank body base 40, the tank locking sleeve 41, the tank locking stopper 42, the inner frame shaft sleeve seat 43, the inner frame support plate 44, the inner frame support seat 45, the support seat 46 and the limit base 47.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The utility model discloses a vacuum leaching tank, which comprises a rack base 1 and a tank body 2 arranged on the rack base 1, wherein a vacuum pump is arranged on the tank body 2, and the vacuum pump provides a negative pressure environment for the tank body 2 during work. The tank body 2 is provided with a tank body upper cover 3 which can be opened and closed above, the opening and closing functions of the tank body upper cover 3 are realized through a lifting mechanism, and the lifting mechanism is arranged at the side of the tank body 2. The bottom of the tank body 2 and the top of the tank body 2 can be connected by adopting the modes of fastening, splicing and the like, and the joint is provided with a sealing ring to ensure that the tank body 2 is in a sealed environment during operation. A transmission pressing plate 4 driven by a rotating mechanism is arranged below the tank body upper cover 3, and the lower end of the transmission pressing plate 4 is connected with an inner frame 5. The top end of the inner frame 5 is detachably connected with the bottom end of the transmission pressing plate 4, when the materials in the inner frame 5 need to be poured out, the tank upper cover 3 is opened through the lifting mechanism, the transmission pressing plate 4 and the tank upper cover 3 are driven to move upwards together, and the transmission pressing plate 4 and the inner frame 5 are separated. As shown in fig. 8, the bottom of the inner frame 5 is provided with inner frame support plates 44, and the inner frame 5 is placed inside the tank body 2 by arranging the inner frame support plates 44; an inner frame supporting seat 45 is arranged on the frame base 1, the inner frame supporting seat 45 penetrates the bottom of the tank body 2 to enter an inner frame supporting plate 44, and the bottom of the tank body 2 is connected with the inner frame supporting seat 45 in a flange connection mode.

It should be noted that a certain gap is left between the outside of the inner frame 5 and the inside of the tank body 2 to form a cavity 6 for storage, and a plurality of through holes 7 are formed in the circumferential side wall of the inner frame 5. When the device works, the rotating mechanism drives the transmission pressing plate 4 to rotate, so that the inner frame 5 is driven to rotate, the pepper oil in the inner frame 5 is separated into the tank through the through hole 7 under the centrifugal force generated by the high-speed rotation of the inner frame 5, and the deoiling function is realized.

When the heat-conducting oil tank works, in order to ensure that the temperature in the tank body 2 is maintained within a certain range, the bottom of the tank body 2 is provided with a vortex-shaped heat-conducting oil pipe 8, and the heat-conducting oil pipe 8 is wound into a vortex shape along the circumferential direction of the tank body 2. As shown in fig. 7, specifically, the heat transfer oil pipe 8 is wound in a spiral shape between the inner frame 5 and the can body 2. When the device works, the material is arranged in the inner frame 5, and the heat conduction oil pipe 8 outside the inner frame 5 heats the bottom of the inner frame 5 to ensure the temperature in the inner frame 5; and heat conduction oil pipe 8 sets up inside jar body 2, has blockked the lower external influence of temperature to heat conduction oil pipe 8 to a certain extent, has guaranteed heat conduction oil pipe 8's heat conduction efficiency.

Further, as shown in fig. 7, two ports (inlet end and outlet end) of the heat conducting oil pipe 8 are integrally disposed in a sleeve 9, and the sleeve 9 includes an inner pipe 10 and an outer pipe 11 disposed outside the inner pipe 10. Specifically, the inner tube 10 and the outer tube 11 of the casing 9 are respectively used as a conduction oil inlet end and a conduction oil outlet end, or the inner tube 10 and the outer tube 11 of the casing 9 are respectively used as a conduction oil outlet end and a conduction oil inlet end. The inlet end and the outlet end of the heat conduction oil pipe 8 are integrated in the same sleeve 9, so that the structure of the heat conduction oil pipe 8 is simplified, and the device is more attractive.

The specific implementation mode of the lifting mechanism is as follows: as shown in fig. 1-3, the lifting mechanism comprises a first cylinder 12, an output end of the first cylinder 12 is fixedly connected with the can body upper cover 3, and the first cylinder 12 drives the can body upper cover 3 to move up and down. Specifically, the tank upper cover 3 comprises an upper cover body 13 and an upper cover edge plate 14 arranged at the lower end of the upper cover body 13, the upper cover edge plate 14 is arranged to protrude out of the lower end of the upper cover body 13, and the upper cover edge plate 14 is fixedly connected with the output end of the first air cylinder 12. An upper cover sealing plate 15 is arranged at the top of the upper cover body 13, a vacuum joint 16 is arranged on the upper cover body 13, a vacuum pump is arranged at the other end of the vacuum joint 16, and during operation, oil vapor is discharged through the vacuum joint 16.

Furthermore, a lifting support 17 is arranged beside the tank body 2, the lifting support 17 is arranged on the rack base 1, and the first cylinder 12 is fixedly arranged on the lifting support 17. The output end of the first cylinder 12 is provided with a connecting rod 18, and the connecting rod 18 is arranged on the lifting support 17 in a sliding manner to limit the tank upper cover 3 to move up and down only in the vertical direction.

In a preferred embodiment, the number of the first cylinders 12 is two, and the two cylinders are respectively and symmetrically arranged at two sides of the tank body 2. The first cylinders 12 arranged at the two ends of the frame base 1 jack up the tank upper cover 3 upwards to realize the action of opening the cover, and the first cylinders 12 descend to close the cover for sealing.

Specific embodiment of the rotating mechanism: as shown in fig. 4, the rotating mechanism includes a motor 19 disposed on the tank upper cover 3, the motor 19 is mounted on the tank upper cover 3 through a motor base 20, an output shaft of the motor 19 is connected to a transmission shaft 22 through a coupling 21, the transmission shaft 22 is mounted on a flat bearing 23 in the motor base 20, the flat bearing 23 bears an axial force of the transmission shaft 22, and the transmission shaft 22 is axially positioned through a roller bearing 24 in the motor base 20. The transmission shaft 22 passes downward through a mechanical seal 25 mounted on the upper cover 13 to realize the internal and external sealing of the upper cover 13. The transmission shaft 22 sequentially penetrates through the upper cover sealing plate 14 and the transmission pressing plate 4 and is fixedly connected with the transmission pressing plate 4. Specifically, the transmission shaft 22 is connected to the transmission pressure plate 4 by a flat key. The motor 19 is started, the motor 19 drives the transmission shaft 22 to rotate, the upper cover body 13 does not rotate, the transmission pressing plate 4 rotates, and the transmission pressing plate 4 is fixedly connected with the inner frame 5 to drive the inner frame 5 to rotate together.

Further, a buffer spring 26 is arranged between the tank body upper cover 3 and the transmission pressure plate 4, and the buffer spring 26 is sleeved on the periphery of the transmission shaft 22. Specifically, the buffer spring 26 is disposed between the bottom end of the upper cover sealing plate 15 and the top end of the transmission pressure plate 4. When the tank upper cover 3 descends and is tightly pressed with the flange at the top end of the tank body 2, the buffer spring 26 tightly presses the outer conical surface of the transmission pressure plate 4, and the outer conical surface of the transmission pressure plate 4 is tightly pressed with the inner conical surface of the inner frame 5. The transmission pressure is adjusted by arranging the buffer spring 26, the transmission pressing plate 4 rotates, the transmission pressing plate 4 is fixedly connected with the inner frame 5, the outer conical surface of the transmission pressing plate 4 compresses the inner conical surface of the inner frame 5, the inner frame 5 rotates by taking the shaft sleeve at the lower end of the inner frame 5 as a rotating fulcrum under the action of conical surface friction force, and the pepper oil in the pepper oil-containing pepper in the inner frame 5 is separated into the can under the centrifugal force generated by the high-speed rotation of the inner frame 5, so that the oil removing function is realized.

Further, a support ring 27 is fixedly arranged on the periphery of the tank body 2, the sleeve 9 and the material pipe 28 are symmetrically arranged on the support ring 27 along the radial direction of the tank body 2, the sleeve 9 or the material pipe 28 is connected with a turnover mechanism, and the turnover mechanism is used for dumping the tank body 2. In particular, the material tube 28 is connected to a tilting mechanism.

Specific embodiment of the canting mechanism: as shown in fig. 5, 9 and 10, the turnover mechanism includes a second cylinder 29 disposed at the side of the tank body 2, a cylinder joint 30 of the second cylinder 29 is connected to a driving sprocket 31, the driving sprocket 31 is connected to a driven sprocket 33 through a chain 32, and the driven sprocket 33 is connected to the material pipe 28 through a sleeve seat 34. The second cylinder 29 drives the driving sprocket 31 to rotate, the driving sprocket 31 drives the driven sprocket 33 to rotate through the chain 32, and the driven sprocket 33 drives the tank body 2 to turn over. It should be noted that the cylinder joint 30 of the second cylinder 29 can rotate in the forward and reverse directions, so as to realize the turnover and material pouring of the tank body 2, and reset after the material pouring is completed.

Specifically, the second cylinder 29 is arranged at the bottom of the frame base 1 through a cylinder base 35, and a plane formed by the driving sprocket 31, the chain 32 and the driven sprocket 33 is perpendicular to the material pipe 28. The driving chain wheel 31 is arranged on a bearing seat 36, the bearing seat 36 is arranged at the top of the rack base 1 through a bearing mounting seat 37, and the cylinder hinge joint 30 is hinged with the side surface of the driving chain wheel 31 through an eccentric hinge shaft. The material pipe 28 passes through the driven chain wheel 33 to be connected with the shaft sleeve seat 34, and the shaft sleeve seat 34 is installed at the top of the rack base 1 through a supporting seat 46. A certain height difference is left between the driving sprocket 31 and the driven sprocket 33, and the axis of the driven sprocket 33 is higher than the axis of the driving sprocket 31 with reference to the upper surface of the frame base 1, and the diameter of the driving sprocket 31 is larger than the diameter of the driven sprocket 33.

The transmission ratio of the driving sprocket 31 to the driven sprocket 33 is i, i is preferably 2:3, and the cylinder joint 30 (piston rod joint) of the second cylinder 29 pushes the eccentric hinge shaft on the driving sprocket 31 to push the driving sprocket 31 to rotate by an angle α in the extending direction of the second cylinder 29, where α is 180 ° x i. At this point the maximum piston travel of the second cylinder 29 is reached. The driving chain wheel 31 is connected with the driven chain wheel 33 through the chain 32, when the driving chain wheel 31 rotates by an angle alpha, the driven chain wheel 33 correspondingly rotates by 180 degrees, the driven chain wheel 33 is connected with the material pipe 28 through a flat key, the driven chain wheel 33 drives the material pipe 28 to rotate by 180 degrees, the material pipe 28 is rigidly connected with the support ring 27, and the material pipe 28 drives the can body 2 to rotate by 180 degrees along the axis of the material pipe 28, so that the unloading function of overturning the can body 2 is realized. On the contrary, when the piston rod of the second cylinder 29 moves in a return stroke, the driving sprocket 31 rotates in a reverse direction by an angle α to drive the driven sprocket 33 to rotate in a reverse direction by 180 °, and the driven sprocket 33 drives the material pipe 28 and the tank body 2 to rotate in a reverse direction by 180 °, so that the reset function of turning over the tank body 2 is realized.

Further, as shown in fig. 6, the bottom of the tank body 2 is provided with a locking mechanism, the locking mechanism includes a third cylinder 38, a piston rod of the third cylinder 38 is connected with a tank locking pin shaft 39, the bottom of the tank body 2 is arranged on the rack base 1 through a tank base 40, the lower end of the tank base 40 is provided with a limiting base 47, the limiting base 47 is provided with a tank locking sleeve 41, and the tank locking pin shaft 39 penetrates into the tank locking sleeve 41 under the pushing of the third cylinder 38. A tank locking stop 42 is further arranged between the first cylinder 12 and the tank locking sleeve 41, and the tank locking stop 42 is used for aligning the tank locking pin shaft 39 and the tank locking sleeve 41 on the same straight line, so that the tank locking pin shaft 39 can conveniently penetrate into the tank locking sleeve 41.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various changes, modifications, alterations, and substitutions which may be made by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A vacuum leaching tank is characterized in that: the anti-explosion tank comprises a tank body (2) and an inner frame (5) sleeved in the tank body (2), wherein a plurality of through holes (7) are formed in the circumferential side wall of the inner frame (5), a cavity (6) is formed between the inner frame (5) and the tank body (2), and a heat-conducting oil pipe (8) is arranged in the cavity (6) and positioned at the bottom of the tank body (2); the supporting ring (27) is arranged on the periphery of the tank body (2), and the supporting ring (27) is connected with a turnover mechanism for dumping the tank body (2).

2. A vacuum leaching tank according to claim 1, wherein: the inlet end and the outlet end of the heat-conducting oil pipe (8) are integrally arranged on the sleeve (9), the sleeve (9) comprises an outer pipe (11) and an inner pipe (10) sleeved in the outer pipe (11), the outer pipe (11) is used for the inlet end of the heat-conducting oil pipe (8), and the inner pipe (10) is used for the outlet end of the heat-conducting oil pipe (8); or the inner pipe (10) is used for the inlet end of the heat-conducting oil pipe (8), and the outer pipe (11) is used for the outlet end of the heat-conducting oil pipe (8).

3. A vacuum leaching tank according to claim 2, wherein: the material pipe (28) is symmetrically arranged on the support ring (27) and the sleeve (9) is sleeved on the support ring, the turnover mechanism comprises a second air cylinder (29), an air cylinder hinged joint (30) of the second air cylinder (29) is hinged with a driving chain wheel (31), the driving chain wheel (31) is connected with a driven chain wheel (33) through a chain (32), and the driven chain wheel (33) is fixedly connected with the material pipe (28) or the sleeve (9).

4. A vacuum leaching tank according to claim 3, wherein: cylinder articulated joint (30) through eccentric articulated shaft with drive sprocket (31) side hinge is connected, material pipe (28) pass driven sprocket (33) are connected with axle sleeve seat (34), axle sleeve seat (34) are installed at frame base (1) top through supporting seat (46), frame base (1) is used for supporting jar body (2).

5. A vacuum leaching tank according to claim 4, wherein: the transmission ratio of the driving chain wheel (31) to the driven chain wheel (33) is 2: 3.

6. A vacuum leaching tank according to any of claims 1 to 5, wherein: a tank body upper cover (3) which is driven by a lifting mechanism to open and close is arranged above the tank body (2), the tank body upper cover (3) comprises an upper cover body (13) and an upper cover edge plate (14) arranged at the lower end of the upper cover body (13), and the upper cover edge plate (14) protrudes out of the lower end of the upper cover body (13); the lifting mechanism comprises a first air cylinder (12), and the output end of the first air cylinder (12) is connected with the upper cover edge plate (14).

7. A vacuum leaching tank according to claim 6, wherein: the tank body (2) is provided with a lifting support (17) at the side, the lifting support (17) is provided with a connecting rod (18) in an up-and-down sliding manner, and the connecting rod (18) is connected with the output end of the first cylinder (12).

8. A vacuum leaching tank according to any one of claims 1 to 5, wherein: the utility model discloses a tank locking device, including jar body (2), locking mechanical system, jar body (2) bottom is provided with locking mechanical system, locking mechanical system includes third cylinder (38), third cylinder (38) piston rod is connected with lock jar round pin axle (39), jar body (2) bottom is provided with spacing base (47), be provided with lock jar sleeve pipe (41) on spacing base (47), lock jar round pin axle (39) penetrate lock jar sleeve pipe (41) under third cylinder (38) promote.

9. A vacuum leaching tank according to claim 6, wherein: a transmission pressing plate (4) driven by a rotating mechanism is arranged at the top end of the inner frame (5), and the upper cover body (13) is arranged above the transmission pressing plate (4); the rotating mechanism comprises a motor (19) arranged above the upper cover body (13), an output shaft of the motor (19) is connected with a transmission shaft (22) through a coupler, and the other end of the transmission shaft (22) downwards penetrates through the upper cover body (13) and is fixedly connected with the transmission pressing plate (4).

10. A vacuum leaching tank according to claim 9, wherein: a buffer spring (26) is arranged between the tank body upper cover (3) and the transmission pressing plate (4), and the buffer spring (26) is sleeved on the periphery of the transmission shaft (22).