A thickener

Abstract

The application relates to the technical field of chemical equipment, in particular to a thickener. The thickener comprises a main body, a liquid inlet assembly and a stirring assembly; the main body is provided with an inner cavity; the liquid inlet assembly is used for uniformly distributing slurry in the inner cavity; the stirring assembly comprises a stirring shaft, a stirring motor, a stirring piece, a wall scraping piece and a lifting unit; the stirring shaft is rotatably arranged in the inner cavity along the axial direction of the main body; the stirring piece and the wall scraping piece are connected with the stirring shaft; the wall scraping piece is in abutment with the inner wall of the inner cavity, and the wall scraping piece and the stirring shaft are slidably matched along the axis of the main body; the stirring motor and the lifting unit are connected with the main body, the stirring motor is in transmission connection with the stirring shaft, the stirring motor is used for driving the stirring shaft, the stirring piece and the wall scraping piece to rotate relative to the inner cavity, and the lifting unit is used for driving the wall scraping piece to slide relative to the stirring shaft. The thickener has simple structure and is convenient to use; in the use process, the stirring effect can be realized, and the effect of scraping off the attached materials on the inner wall can also be realized.

Description

Technical Field

[0001] This application relates to the field of chemical equipment technology, and more specifically, to a thickener. Background Technology

[0002] A thickener, also known as a slurry thickener or thickener, is a settling device used to concentrate solid particles in a suspension. The basic function of a continuous thickener is to concentrate suspended solids through gravity settling, thus achieving a stable material balance, with the solids being continuously discharged in the underflow. A suspension containing salt crystals (i.e., slurry) is fed into the thickener through the inlet, where it undergoes settling and separation, forming crystalline salt at the bottom and a saturated solution at the top. However, in existing technologies, the suspension needs to be stirred during use to accelerate the separation process. Furthermore, thickeners are prone to clogging and wall scraping. Therefore, during operation, while stirring, the crystalline salt on the inner wall also needs to be scraped off, resulting in a complex thickener structure. Summary of the Invention

[0003] This application provides a thickener to improve the above-mentioned problems.

[0004] The present invention is as follows:

[0005] A thickener includes a main body, a liquid inlet assembly, and a stirring assembly;

[0006] The main body has an inner cavity; the liquid inlet assembly is used to evenly distribute the slurry in the inner cavity; the stirring assembly includes a stirring shaft, a stirring motor, a stirring component, a wall scraper, and a lifting unit; the stirring shaft is rotatably housed in the inner cavity along the axis of the main body; the stirring component and the wall scraper are both connected to the stirring shaft, the wall scraper abuts against the inner wall of the inner cavity, and the wall scraper and the stirring shaft are slidably engaged along the axis of the main body;

[0007] The stirring motor and the lifting unit are both connected to the main body, and the stirring motor is connected to the stirring shaft. The stirring motor is used to drive the stirring shaft, stirring components and wall scraping components to rotate relative to the inner cavity, and the lifting unit is used to drive the wall scraping components to slide relative to the stirring shaft.

[0008] In one embodiment of the present invention, the main body has a first portion and a second portion, the first portion and the second portion are connected and together form an inner cavity, and along its axial direction, the outer diameter of the second portion gradually decreases from top to bottom.

[0009] In one embodiment of the present invention, the stirring element and the stirring shaft are slidably engaged along the axis of the main body;

[0010] The stirring assembly also includes a first connector and a second connector, both of which are connected to the stirring shaft and are slidably connected to the stirring shaft along its axial direction. The outer circumferential surface of the stirring shaft is provided with a guide protrusion, and both the first connector and the second connector are provided with directional portions that cooperate with the guide protrusion. The guide protrusion is used to guide the first connector and the second connector to slide along the axial direction of the stirring shaft.

[0011] Along the axial direction of the stirring shaft, the first connector and the second connector are spaced apart. The stirring component includes multiple stirring blades, and both ends of each stirring blade are hinged to the first connector and the second connector, respectively. The wall scraper is connected to the second connector.

[0012] In one embodiment of the present invention, the second connector includes a body and a telescopic part. The body is connected to the stirring shaft, one end of the telescopic part is connected to the body, and the other end of the telescopic part is connected to the wall scraper. The telescopic part is used to make the wall scraper tend to move toward the inner wall of the inner cavity.

[0013] In one embodiment of the present invention, the wall scraping component includes a scraper, which is hinged to one end of the telescopic part away from the stirring shaft.

[0014] In one embodiment of the present invention, the wall scraping member further includes a reset member, the two ends of which are respectively connected to the scraper and the telescopic part. The reset member is used to make the scraper have a tendency to rotate to a position perpendicular to the telescopic part.

[0015] In one embodiment of the present invention, the end of the stirring blade that is connected to the second connecting member is hinged to the telescopic part; wherein, when the wall scraper moves from the inner wall of the first section to the inner wall of the second section, the length of the telescopic part decreases, and the end of the stirring blade that is hinged to the telescopic part retracts toward the stirring shaft, thereby causing the stirring blade to tilt relative to the axis of the stirring shaft.

[0016] In one embodiment of the present invention, the stirring shaft is a hollow shaft, and the stirring shaft includes a first section and a second section, the first section and the second section are connected, and the second section is provided with a guide groove;

[0017] The lifting unit includes a hydraulic cylinder and a third connecting member. The movable end of the hydraulic cylinder is housed in the second section and connected to the third connecting member housed in the second section. A portion of the third connecting member passes through a guide groove and is connected to the second connecting member, so that the movement of the hydraulic cylinder can drive the second connecting member to slide relative to the stirring shaft.

[0018] In one embodiment of the present invention, the liquid inlet assembly includes a liquid inlet pipe and a liquid distributor. The liquid distributor is housed in an inner cavity. The liquid inlet pipe is connected to the main body and is used to introduce slurry into the liquid distributor. The liquid distributor is used to evenly distribute the slurry in the inner cavity.

[0019] The beneficial effects of this invention are:

[0020] This thickener includes a main body, a liquid inlet assembly, and a stirring assembly. The main body has an inner cavity. The liquid inlet assembly is used to evenly distribute the slurry within the inner cavity. The stirring assembly includes a stirring shaft, a stirring motor, a stirring component, a wall scraper, and a lifting unit. The stirring shaft is rotatably housed within the inner cavity along the axis of the main body. The stirring component and the wall scraper are both connected to the stirring shaft, with the wall scraper abutting against the inner wall of the cavity, and the wall scraper and the stirring shaft are slidably engaged along the axis of the main body. The stirring motor and the lifting unit are both connected to the main body, and the stirring motor is drively connected to the stirring shaft. The stirring motor drives the stirring shaft, the stirring component, and the wall scraper to rotate relative to the inner cavity, while the lifting unit drives the wall scraper to slide relative to the stirring shaft. This thickener has a simple structure and is easy to use. During use, it can both stir and scrape off the material adhering to the inner wall, thus simplifying its overall structure and reducing its manufacturing and usage costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the thickener provided in this application;

[0023] Figure 2 A schematic diagram of the thickener provided in this application when the wall scraper is located within the first section;

[0024] Figure 3 A schematic diagram of the thickener provided in this application when the wall scraper is located in the second section.

[0025] Icons: 100-Thickener; 110-Main body; 120-Liquid inlet assembly; 130-Stirring assembly; 111-Inner cavity; 131-Stirring shaft; 132-Stirring motor; 133-Stirring component; 134-Wall scraper; 135-Lifting unit; 112-First section; 113-Second section; 136-First connector; 137-Second connector; 138-Guide protrusion; 139-Stirring blade; 141-Main body; 142-Extension section; 143-Scraper; 144-Reset component; 145-First segment; 146-Second segment; 147-Guide groove; 148-Hydraulic cylinder; 149-Third connector; 121-Liquid inlet pipe; 122-Liquid distributor. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of the embodiments of this application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art, and is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, the terms "first," "second," "third," etc. are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] In the description of the embodiments of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] Please refer to Figures 1-3 The present invention provides a thickener 100, including a main body 110, a liquid inlet assembly 120 and a stirring assembly 130;

[0033] The main body 110 has an inner cavity 111; the liquid inlet assembly 120 is used to evenly distribute the slurry in the inner cavity 111; the stirring assembly 130 includes a stirring shaft 131, a stirring motor 132, a stirring component 133, a wall scraper 134, and a lifting unit 135; the stirring shaft 131 is rotatably housed in the inner cavity 111 along the axial direction of the main body 110; the stirring component 133 and the wall scraper 134 are both connected to the stirring shaft 131, the wall scraper 134 abuts against the inner wall of the inner cavity 111, and the wall scraper 134 and the stirring shaft 131 are slidably engaged along the axial direction of the main body 110;

[0034] The stirring motor 132 and the lifting unit 135 are both connected to the main body 110, and the stirring motor 132 is connected to the stirring shaft 131. The stirring motor 132 is used to drive the stirring shaft 131, the stirring component 133 and the wall scraper 134 to rotate relative to the inner cavity 111, and the lifting unit 135 is used to drive the wall scraper 134 to slide relative to the stirring shaft 131.

[0035] Please refer to Figures 1-3 The working principle of the thickener 100 is as follows:

[0036] The thickener 100 includes a main body 110, a liquid inlet assembly 120, and a stirring assembly 130. The main body 110 has an inner cavity 111. The liquid inlet assembly 120 is used to evenly distribute the slurry in the inner cavity 111. The stirring assembly 130 includes a stirring shaft 131, a stirring motor 132, a stirring element 133, a wall scraper 134, and a lifting unit 135. The stirring shaft 131 is rotatably housed in the inner cavity 111 along the axial direction of the main body 110. The stirring element 133 and the wall scraper 134 are both connected to the stirring shaft 131. The wall scraper 134 abuts against the inner wall of the inner cavity 111, and the wall scraper 134 and the stirring shaft 131 are slidably engaged along the axis of the main body 110; wherein, the stirring motor 132 and the lifting unit 135 are both connected to the main body 110, and the stirring motor 132 is drivenly connected to the stirring shaft 131. The stirring motor 132 is used to drive the stirring shaft 131, the stirring component 133 and the wall scraper 134 to rotate relative to the inner cavity 111, and the lifting unit 135 is used to drive the wall scraper 134 to slide relative to the stirring shaft 131.

[0037] In operation, the thickener 100 can be driven by the stirring motor 132 to rotate the stirring shaft 131. As the stirring shaft 131 rotates, it can drive the stirring component 133 and the wall scraper 134 to rotate, thereby stirring the slurry and driving the wall scraper 134 to rotate to remove the crystallized material on the inner wall. The stirring component 133 and the wall scraper 134 can be driven by a single drive element to rotate, thus simplifying the overall structure. In addition, since it has a certain depth, in order to simplify the structure of the wall scraper 134 and enable the wall scraper 134 to scrape off the material covering the inner wall of the main body 110, the lifting unit 135 can remove the movement of the wall scraper 134 in the depth direction of the main body 110. Under the synchronous drive of the stirring motor 132, the wall scraper 134 can slide along the axis of the stirring shaft 131 while rotating, thereby cleaning the inner wall and reducing the crystallized material adhering to the inner wall.

[0038] In summary, the thickener 100 has a simple structure and is easy to use. During use, it can both stir and scrape off the material adhering to the inner wall, thus simplifying its overall structure and reducing its manufacturing and usage costs.

[0039] Further, please refer to Figures 1-3 In this embodiment, when setting the main body 110, in order to facilitate the material output of the main body 110, the main body 110 has a first part 112 and a second part 113. The first part 112 and the second part 113 are connected and together form an inner cavity 111. Along its axial direction, the outer diameter of the second part 113 gradually decreases from top to bottom.

[0040] Based on the above structural configuration, in order to allow the scraper 134 to move along the axial direction of the stirring shaft 131 under the driving action of the lifting unit 135, the stirring component 133 can also be slidably engaged with the stirring shaft 131 along the axis of the main body 110, so that the scraper 134 can drive the stirring component 133 to work synchronously during the movement under the action of the lifting unit 135; specifically, the stirring assembly 130 also includes a first connecting member 136 and a second connecting member 137, both of which are connected to the stirring shaft 131 and are slidably connected to the stirring shaft 131 along the axial direction of the stirring shaft 131; wherein, the outer peripheral surface of the stirring shaft 131 is provided with a guide protrusion 138, and both the first connecting member 136 and the second connecting member 137 are provided with a directional part that engages with the guide protrusion 138, the guide protrusion 138 is used to guide the first connecting member 136 and the second connecting member 137 to slide along the axial direction of the stirring shaft 131;

[0041] Along the axial direction of the stirring shaft 131, the first connector 136 and the second connector 137 are spaced apart. The stirring component 133 includes a plurality of stirring blades 139, and both ends of each stirring blade 139 are respectively hinged to the first connector 136 and the second connector 137. The wall scraper 134 is connected to the second connector 137.

[0042] As can be seen from the above, based on the structure of the first connector 136 and the second connector 137, the guide protrusion 138 can cooperate with the first connector 136 and the second connector 137, thereby enabling the first connector 136 and the second connector 137 to rotate relative to the main body 110 under the action of the stirring motor 132. At the same time, they can slide along the axis of the stirring shaft 131 under the action of the lifting unit 135, thereby moving to different positions inside the main body 110 to play the role of stirring and cleaning the inner wall at different positions.

[0043] Furthermore, based on the above structure, as can be seen from the above content, since the outer radial direction of the second part 113 gradually decreases downward, in order to enable the wall scraper 134 to adapt to the internal contour of the main body 110, the second connecting member 137 includes a body 141 and a telescopic part 142. The body 141 is connected to the stirring shaft 131, one end of the telescopic part 142 is connected to the body 141, and the other end of the telescopic part 142 is connected to the wall scraper 134. The telescopic part 142 is used to make the wall scraper 134 have a tendency to move towards the inner wall of the inner cavity 111.

[0044] With this configuration, when the scraper 134 slides along the axis of the stirring shaft 131 to the position corresponding to the second section 113, in order for the stirring member 133 to adapt to the contour of the second section 113, the telescopic part 142 will be compressed under the action of the lifting unit 135. This allows the scraper 134 to adapt to the contour of the second section 113 while moving downward, under the retraction of the telescopic part 142. At the same time, under the action of the telescopic part 142, it maintains a state of abutment against the inner wall of the second section 113. This allows it to adapt to changes in the size of the inner wall of the main body 110, thus ensuring the scraping and cleaning effect.

[0045] Further, please refer to Figures 1-3Based on the above structure, as the size of the main body 110 changes, in order to increase the contact area between the scraper 134 and the inner wall of the main body 110, the scraper 134 includes a scraper 143. The scraper 143 is hinged to one end of the telescopic part 142 away from the stirring shaft 131. Thus, during the movement of the scraper 134 under the driving action of the lifting unit 135, the contact area between the scraper 143 and the inner wall of the main body 110 can be increased through the rotation of the scraper 143 and the telescopic part 142. In addition, in order for the scraper 143 to be reset when the scraper 134 moves from the second part 113 to the inner wall of the first part 112, the scraper 134 also includes a reset member 144. The two ends of the reset member 144 are respectively connected to the scraper 143 and the telescopic part 142. The reset member 144 is used to make the scraper 143 have a tendency to rotate to a position perpendicular to the telescopic part 142. It should be noted that, since there is a dimensional change at the connection between the first part 112 and the second part 113, resulting in a certain included angle, in order to prevent the scraper 143 from getting stuck when passing through the included angle between the first part 112 and the second part 113, the end of the scraper 143 is provided with an arc-shaped transition part (not shown in the figure) so that the scraper 143 can smoothly pass through the included angle between the first part 112 and the second part 113.

[0046] Please refer to Figures 1-3 Based on the above structure, since the wall scraper 134 moves along the axis of the stirring shaft 131 under the driving action of the lifting unit 135, it will drive the stirring member 133 to move synchronously with it. Based on this, in order to make the stirring member 133 and the wall scraper 134 adapt to the internal contour of the main body 110, the end of the stirring blade 139 used to connect with the second connecting member 137 is hinged to the telescopic part 142. When the wall scraper 134 moves from the inner wall of the first part 112 to the inner wall of the second part 113, the length of the telescopic part 142 decreases, and the end of the stirring blade 139 used to hinge with the telescopic part 142 retracts towards the stirring shaft 131, thereby making the stirring blade 139 tilt relative to the axis of the stirring shaft 131. It should be noted that with this configuration, when the scraper 134 moves to the position corresponding to the second section 113, the stirring blade 139 of the agitator 133 can move synchronously with it. During the movement, the stirring blade 139 will also tilt, so that the tilt of the stirring blade 139 can adapt to the contour change of the second section 113 and drive the material in the second section 113 towards the discharge port. In this way, the movement of the stirring blade 139 can cooperate with the scraper 134, so that when the scraper 134 scrapes the material on the inner wall, the material pushing action of the stirring blade 139 can accelerate the material cleaning speed, thereby quickly solving the blockage problem and improving the working efficiency of the thickener 100.

[0047] Further, please refer to Figures 1-3 Based on the above structural configuration, in this embodiment, when setting the stirring shaft 131, in order to enable the lifting unit 135 to drive the wall scraper 134 to move, the stirring shaft 131 is a hollow shaft. The stirring shaft 131 includes a first segment 145 and a second segment 146. The first segment 145 is connected to the second segment 146, and the second segment 146 is provided with a guide groove 147. The lifting unit 135 includes a hydraulic cylinder 148 and a third connecting member 149. The movable end of the hydraulic cylinder 148 is housed in the second segment 146 and is connected to the third connecting member 149 housed in the second segment 146. A portion of the third connecting member 149 passes through the guide groove 147 and is connected to the second connecting member 137, so that the movement of the hydraulic cylinder 148 can drive the second connecting member 137 to slide relative to the stirring shaft 131.

[0048] In addition, based on the above structure, the liquid inlet assembly 120 includes a liquid inlet pipe 121 and a liquid distributor 122. The liquid distributor 122 is housed in the inner cavity 111. The liquid inlet pipe 121 is connected to the main body 110 and is used to introduce the slurry into the liquid distributor 122. The liquid distributor 122 is used to evenly distribute the slurry in the inner cavity 111.

[0049] In summary, please refer to Figures 1-3 In this embodiment, the above-described structural arrangement allows the stirring blade 139 to move synchronously with the wall scraper 134 along the axial direction of the stirring shaft 131. During this movement, the displacement of the stirring blade 139 causes it to tilt, resulting in a smaller distance between the end of the stirring blade 139 closest to the second connector 137 and the stirring shaft 131 compared to the other end. This allows it to adapt to the contour shape of the second section 113, whose outer diameter gradually decreases from top to bottom. This improves the wall scraping efficiency. Furthermore, the stirring blade 139 acts as a material stirrer in the first section 112 and a material pusher in the second section 113, quickly resolving material blockage issues. The wall scraper 134 further enhances the scraping effect on the second section 113, simplifying the overall structure of the thickener 100, increasing its working efficiency, and reducing its operating costs.

[0050] It should be noted that in this embodiment, the discharge port and its discharge principle are the same as those in the prior art, so they will not be described again here. In addition, in the above content, the connection between each of the above structures and the main body 110 is provided with a sealing structure, the purpose of which is to prevent leakage. The principle of the structure setting is the same as that in the prior art, so it will not be described again here. In addition, when the stirring shaft 131 is set, since the stirring component 133 and the wall scraper 134 are slidably connected to it, the influence of particles in the slurry on its sliding can be ignored during the sliding process under the action of stirring and settling. The same applies to other moving positions and hinged positions.

[0051] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A thickener characterized in that: the thickener comprises a main body, a liquid inlet assembly and a stirring assembly; the main body is provided with an inner cavity; the liquid inlet assembly is used for uniformly distributing slurry in the inner cavity; the stirring assembly comprises a stirring shaft, a stirring motor, a stirring piece, a wall scraping piece and a lifting unit; the stirring shaft is rotatably accommodated in the inner cavity along the axial direction of the main body; the stirring piece and the wall scraping piece are connected with the stirring shaft, the wall scraping piece abuts against the inner wall of the inner cavity, and the wall scraping piece and the stirring shaft are slidably matched along the axial direction of the main body; wherein, the stirring motor and the lifting unit are connected with the main body, the stirring motor is drivingly connected with the stirring shaft, the stirring motor is used for driving the stirring shaft, the stirring piece and the wall scraping piece to rotate relative to the inner cavity, and the lifting unit is used for driving the wall scraping piece to slide relative to the stirring shaft; the main body is provided with a first part and a second part, the first part and the second part are connected and jointly form the inner cavity, and the outer diameter of the second part gradually decreases from top to bottom along the axial direction thereof; the stirring piece and the stirring shaft are slidably matched along the axial direction of the main body; the stirring assembly further comprises a first connecting piece and a second connecting piece, the first connecting piece and the second connecting piece are connected with the stirring shaft and are slidably connected with the stirring shaft along the axial direction of the stirring shaft; wherein, the outer peripheral surface of the stirring shaft is provided with a guide protrusion, the first connecting piece and the second connecting piece are provided with a directional part matched with the guide protrusion, and the guide protrusion is used for guiding the first connecting piece and the second connecting piece to slide along the axial direction of the stirring shaft; along the axial direction of the stirring shaft, the first connecting piece and the second connecting piece are spaced apart, the stirring piece comprises a plurality of stirring blades, and both ends of each stirring blade are respectively hinged with the first connecting piece and the second connecting piece; the wall scraping piece is connected with the second connecting piece; the second connecting piece comprises a body and an extension part, the body is connected with the stirring shaft, one end of the extension part is connected with the body, the other end of the extension part is connected with the wall scraping piece, and the extension part is used for enabling the wall scraping piece to have a tendency to move towards the inner wall of the inner cavity; the end of the stirring piece used for being connected with the second connecting piece is hinged with the extension part; wherein, when the wall scraping piece moves from the inner wall of the first part to the inner wall of the second part, the length of the extension part decreases, and the end of the stirring piece used for being hinged with the extension part is retracted towards the direction of the stirring shaft, so that the stirring blade is inclined relative to the axis of the stirring shaft; the wall scraping piece comprises a scraper, and the scraper is hinged with the end of the extension part away from the stirring shaft. 2.A thickener according to claim 1 characterized in that: the wall scraping piece further comprises a reset piece, both ends of the reset piece are respectively connected with the scraper and the extension part, and the reset piece is used for enabling the scraper to have a tendency to rotate to a position perpendicular to the extension part. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 3. The thickener according to claim 1, characterized in that: the stirring shaft is a hollow shaft, the stirring shaft comprises a first segment and a second segment, the first segment is connected with the second segment, and the second segment is provided with a guide groove; the lifting unit comprises a hydraulic cylinder and a third connecting piece, a movable end of the hydraulic cylinder is accommodated in the second segment and connected with the third connecting piece accommodated in the second segment, part of the third connecting piece passes through the guide groove and is connected with the second connecting piece, so that movement of the hydraulic cylinder can drive the second connecting piece to slide relative to the stirring shaft.

4. The thickener according to any one of claims 1-3, characterized in that: the liquid inlet assembly comprises a liquid inlet pipe and a liquid distributor, the liquid distributor is accommodated in the inner cavity, the liquid inlet pipe is connected with the main body and used for guiding slurry into the liquid distributor, and the liquid distributor is used for uniformly distributing the slurry in the inner cavity.

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