Mine sump sludge discharge assembly

Abstract

The utility model discloses a mine sump mud discharge assembly, including sump, making slurry device, slag slurry pump, buffer agitation tank, mud pump and delivery pipeline, the bottom wall of sump is concavely equipped with buffer collection groove, buffer agitation tank and mud pump are both arranged beside sump, buffer agitation tank has feed inlet and discharge outlet, and the delivery pipeline is equipped with the feed inlet and discharge outlet. The outlet end of the slurry pump is communicated with a feeding port of the buffer stirring tank, the inlet end of the slurry pump is communicated with a discharging port of the buffer stirring tank, the outlet end of the slurry pump is connected and communicated with one end of the conveying pipeline, and the inlet end of the slurry pump is used for sucking slurry from the buffer collecting groove. The slurry making device is used for fluidizing slurry deposited in the water sump and the buffer collecting tank to be in a flow state, so that water in the water sump can be drained until only the slurry is left, the slurry in the water sump flows into the buffer collecting tank in the flow state by the slurry making device, and slurry in the buffer collecting tank is pumped to the buffer stirring tank by the slurry pump; and finally, the slurry is pumped by the slurry pump and sent out through the conveying pipeline.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the mining technology field, especially relates to a mine sump mud discharge assembly. BACKGROUND

[0002] The mine sump refers to the water storage roadway (chamber) which is composed of two mutually independent and sectionally identical groups of roadways below the level of the bottom of the underground mining site, also known as the main sump (i.e. the sump 1 is located on the floor of the roadway 7). During the mining process, the mine underground water and sedimentation water are generally discharged to the sump, and the sump cleaning work is divided into two parts, i.e. sump cleaning and mud discharge, which is an important part of the mine drainage work. Most mines are provided with double sumps, i.e. main sump and auxiliary sump (or referred to as inner sump and outer sump), which aims to alternate cleaning. The sump inlet is generally located at the lowest point of the underground mine site roadway elevation, and the tail end is connected with the water pump house suction well or water distribution well. The sump is paved with tracks and other mud cleaning equipment.

[0003] The underground mud discharge refers to the method and facility for discharging the mud and sand cleaned from the underground sump or sedimentation tank to the ground or other designated locations. The existing underground mud discharge generally has two types, i.e. pipeline mud discharge and transportation mechanical mud discharge. The pipeline mud discharge refers to the method for discharging the mud and sand by the pump through the pipeline, and the commonly used pipeline mud discharge methods include the sealed mud sump mud discharge, slurry pump mud discharge, pressure tank relay mud discharge, jet pump relay mud discharge, etc. The pipeline mud discharge needs to be pressurized again for the relay discharge of the mud and sand due to the low lift of the pressure tank or jet pump, and the high pressure water consumption is large and the efficiency is low.

[0004] Some mines also use the transportation mechanical mud discharge method for discharging the mud and sand by pressurizing the mud slurry of the sump through the filter press into mud cake and then using the shovel loader or mine car and other loading equipment for the discharge of the mud and sand. The method has strong equipment versatility, small amount of capital construction engineering and less investment, but has many transportation links, poor operation conditions, interference to the main roadway transportation and shaft hoisting, and is generally only applicable to the mines with less mud and sand cleaning amount.

[0005] Some mines also use the slurry pump mud discharge, and the commonly used slurry pumps include reciprocating double-cylinder piston pump, oil isolation pump and centrifugal slurry pump, etc. The slurry pump is usually installed in a special chamber, but the slurry pump needs to use the jet pump or other machinery to deliver the slurry to the slurry tank during the operation. Although the actual operation process is simple, the sludge cleaning work amount is large and the efficiency is low. UTILITY MODEL CONTENTS

[0006] In order to solve the above technical problems, the purpose of the utility model is to provide a mine sump mud discharge assembly which has simple structure and good mud discharge effect.

[0007] In order to achieve the above object, the technical scheme of the utility model is as follows: a mine water sump sludge discharge assembly, including water sump, slurry making device, slag slurry pump, buffer mixing tank, slurry pump and conveying pipeline, the bottom wall of water sump is recessed and has buffer collection groove, buffer mixing tank and slurry pump are all arranged in water sump side, buffer mixing tank has inlet and outlet, the outlet end of slag slurry pump is communicated with the inlet of buffer mixing tank, the inlet end of slurry pump is communicated with the outlet of buffer mixing tank, the outlet end of slurry pump is connected with one end of conveying pipeline and is communicated, the inlet end of slag slurry pump is used to suck slurry from buffer collection groove, slurry making device is used to fluidize the mine slurry deposited in water sump and buffer collection groove to flow state.

[0008] The beneficial effects of the above technical scheme are that: so can drain the water in the water sump in advance (the remaining is the mine slurry), then the mine slurry in the water sump is flowed into the buffer collection groove by the slurry making device, the slurry making device can also make the mine slurry in the buffer collection groove to flow state, so that the mine slurry in the buffer collection groove is pumped to the buffer mixing tank by the slag slurry pump, and finally is conveyed to the idle area underground or the ground by the slurry pump through the conveying pipeline, in addition, the main role of the buffer mixing tank is to buffer and stir the mine slurry, so that the slurry pump can suck the homogeneous high-concentration mine slurry and ensure the stability of the suction amount.

[0009] The slurry making device in the above technical scheme includes two slurry making pipe networks, one of which is laid on the bottom wall of the water sump, and the other is laid on the bottom wall of the buffer collection groove.

[0010] The beneficial effects of the above technical scheme are that: so that the slurry making device sprays fluid in the water sump and the buffer collection groove through the slurry making pipe network to make the mine slurry homogeneous and in flow state.

[0011] The slurry making pipe network in the above technical scheme includes a spray pipeline and a plurality of multidimensional nozzles, the spray pipeline has an inlet end, and a plurality of multidimensional nozzles are installed on the spray pipeline and communicate with the spray pipeline.

[0012] The beneficial effects of the above technical scheme are that: so that the water sump and the buffer collection groove can realize multi-point fluid injection, so that the mine slurry in them can be more fully in flow state, thereby having better fluidity.

[0013] The spray pipeline in the water sump in the above technical scheme includes a main pipe and a plurality of branch pipe parts, a plurality of branch pipe parts are arranged in zones on the bottom wall of the water sump, and each branch pipe part is connected with and communicated with the main pipe, and a switching valve is arranged at the communication place, and a plurality of multidimensional nozzles are arranged on each branch pipe part.

[0014] The beneficial effects of the above technical solution are that the multi-dimensional nozzle on the bottom wall of the water tank can be opened in sections, so that the sludge at the bottom of the water tank can be gradually fluidized from near to far with the buffer collection tank as the center, which can reduce the load of the slurry making device and improve the utilization efficiency of the fluid.

[0015] The fluid emitted by the multi-dimensional nozzle in the above technical solution is divergent, and has a one-way valve core inside.

[0016] The beneficial effects of the above technical solution are that the slag can be prevented from entering the multi-dimensional nozzle to cause blockage or jam of the multi-dimensional nozzle, and the slurry making effect of the multi-dimensional nozzle can be improved.

[0017] The slag slurry pump in the above technical solution is a submersible slag slurry pump, which is placed in the buffer collection tank.

[0018] The beneficial effects of the above technical solution are that the operation effect of the slag slurry pump is good.

[0019] The bottom wall of the water tank in the above technical solution is inclined or conical, and the buffer collection tank is located at the lowest level of the bottom wall of the water tank.

[0020] The beneficial effects of the above technical solution are that the fluidized slurry in the water tank can flow into the buffer collection tank by itself.

[0021] At least one one-way valve is installed on the conveying pipeline in the above technical solution.

[0022] The beneficial effects of the above technical solution are that when the slurry pump stops running, the one-way valve can prevent the slurry in the conveying pipeline from flowing back, thereby protecting the valve box of the slurry pump.

[0023] A filter is arranged in the buffer collection tank in the above technical solution, which prevents coarse slag from being sucked into the slag slurry pump.

[0024] The beneficial effects of the above technical solution are that coarse slag can be prevented from entering the slag slurry pump to damage the blades of the slag slurry pump.

[0025] The buffer stirring tank in the above technical solution includes a tank body, a stirring paddle, and a driving motor, the inlet is arranged at the upper end of the tank body, the outlet is arranged at the lower end of the tank body, the stirring paddle is vertically arranged in the tank body, the upper end of the paddle shaft is sealed and rotates out of the tank body, and the driving motor is installed at the upper end of the tank body and is in transmission connection with the upper end of the paddle shaft.

[0026] The beneficial effects of the technical scheme are that the structure is simple, and the driving motor can drive the stirring paddle to rotate to prevent the slurry in the tank from being stratified by sedimentation. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A structure schematic view of the mine sump sludge discharge assembly is described in the embodiment of the utility model;

[0028] Figure 2 A setting schematic view of the buffer collection groove and the slurry pump is described in the embodiment of the utility model;

[0029] Figure 3 A top view of the pipe network for slurry preparation in the water sump is described in the embodiment of the utility model;

[0030] Figure 4 A top view of the branch pipe part is described in the embodiment of the utility model;

[0031] Figure 5 A sectional view of the multi-dimensional nozzle is described in the embodiment of the utility model;

[0032] Figure 6 A sectional view of the buffer stirring tank is described in the embodiment of the utility model;

[0033] Figure 7 A sectional view of the one-way valve in the open state is described in the embodiment of the utility model;

[0034] Figure 8 A sectional view of the one-way valve in the closed state is described in the embodiment of the utility model;

[0035] Figure 9 A top view of the second valve shell is described in the embodiment of the utility model.

[0036] In the drawing: 1 water sump; 11 buffer collection groove; 12 filter; 13 slurry layer; 2 slurry preparation device; 21 pipe network for slurry preparation; 211 injection pipeline; 2111 main pipe; 2112 branch pipe part; 21121 branch main pipe; 21122 branch pipe; 2113 switching valve; 212 multi-dimensional nozzle; 2121 one-way valve core; 2122 first valve shell; 2123 spring; 2124 first valve seat; 2125 perforation; 3 slurry pump; 4 buffer stirring tank; 41 tank body; 411 feeding port; 412 discharging port; 42 stirring paddle; 421 paddle shaft; 422 paddle blade; 43 driving motor; 5 slurry pump; 6 conveying pipeline; 61 one-way valve; 611 second valve shell; 6111 discharging interface; 6112 feeding interface; 612 valve ball; 613 second valve seat; 614 rib plate; 7 roadway. DETAILED DESCRIPTION

[0037] The principles and characteristics of the present application are described below in conjunction with the accompanying drawings, and the examples are used to explain the present application and are not intended to limit the scope of the present application. The present application is described in more detail below with reference to the accompanying drawings. The advantages and characteristics of the present application will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and use non-precise proportions, and are only used to facilitate and clarify the purpose of assisting in the description of the embodiments of the present application.

[0038] As Figure 1 shown, the present embodiment provides a mine sump sludge discharge assembly, which comprises a sump 1, a slurry making device 2, a slag slurry pump 3, a buffer mixing tank 4, a slurry pump 5 and a conveying pipeline 6, a buffer collection groove 11 is recessed on the bottom wall of the sump 1, the buffer mixing tank 4 and the slurry pump 5 are both arranged beside the sump 1, the buffer mixing tank 4 has a feeding port 411 and a discharging port 412, the outlet end of the slag slurry pump 3 is in communication with the feeding port 411 of the buffer mixing tank 4, the inlet end of the slurry pump 5 is in communication with the discharging port 412 of the buffer mixing tank 4, the outlet end of the slurry pump 5 is connected and in communication with one end of the conveying pipeline 6, the inlet end of the slag slurry pump 3 is used to suck in slurry from the buffer collection groove 11, the slurry making device 2 is used to fluidize the deposited mine slurry in the sump 1 and the buffer collection groove 11 to be in a flow state, so that the water in the sump can be drained in advance (only the mine slurry layer 13 is left), then the mine slurry in the sump is caused to flow into the buffer collection groove by the slurry making device, the slurry making device can also cause the mine slurry in the buffer collection groove to be in a flow state, so that the mine slurry liquid in the buffer collection groove is pumped to the buffer mixing tank by the slag slurry pump, and finally delivered to the idle area underground or the ground surface by the slurry pump through the conveying pipeline, in addition, the main function of the buffer mixing tank is to buffer and mix the mine slurry, so that the slurry pump can suck in homogeneous high-concentration mine slurry and ensure the stability of the suction amount.

[0039] As Figure 1 shown, the above technical solution comprises two slurry making pipe networks 21, one of which is laid on the bottom wall of the sump 1, and the other is laid on the bottom wall of the buffer collection groove 11, so that the slurry making device sprays fluid in the sump and the buffer collection groove through the slurry making pipe network to homogenize the mine slurry and make it in a flow state.

[0040] As Figures 2-4As shown in the technical scheme, the pulp-making pipe network 21 comprises a jet pipe 211 and a plurality of multi-dimensional nozzles 212, the jet pipe 211 has an inlet end, and the plurality of multi-dimensional nozzles 212 are installed on the jet pipe 211 and communicate with the jet pipe 211, so that multi-point jet flow can be achieved in the water tank and the buffer collection tank, and the slurry in the water tank and the buffer collection tank can be more fully in a flow state, thereby having better fluidity.

[0041] As shown in the technical scheme, Figure 3 and Figure 4 As shown in the technical scheme, the jet pipe 211 in the water tank 1 comprises a main pipe 2111 and a plurality of branch pipe portions 2112, the plurality of branch pipe portions 2112 are arranged in zones on the bottom wall of the water tank 1, each branch pipe portion 2112 is connected and communicated with the main pipe 2111, and a switching valve 2113 is arranged at the communication position, and a plurality of multi-dimensional nozzles 212 are arranged on each branch pipe portion 2112 and spaced apart, so that the multi-dimensional nozzles on the bottom wall of the water tank can be opened in zones, and the slurry at the bottom of the water tank can be gradually treated in a flow state from near to far with the buffer collection tank as the center, thereby reducing the load of the pulp-making device and improving the utilization efficiency of the fluid. In the embodiment, the branch pipe portion 2112 comprises a branch main pipe 21121 and a plurality of branch pipes 21122, and the main pipe can be arranged along one side of the water tank, and the plurality of branch pipe portions are spaced apart along the length direction of the side of the water tank and arranged on the bottom wall of the water tank. Specifically, the branch main pipe is arranged at the corresponding position of the bottom wall of the water tank and perpendicular to the main pipe, and the plurality of branch pipes are connected and communicated with the corresponding branch main pipe at one end (the branch pipe is perpendicular to the corresponding branch main pipe, and the plurality of branch pipes corresponding to the same branch main pipe are arranged side by side and spaced apart), and a plurality of multi-dimensional nozzles are arranged on each branch pipe and spaced apart along the length direction of the branch pipe.

[0042] In the embodiment, the ends (the ends in the fluid flow direction) of the main pipe and the branch main pipe are blocked, and the ends of the branch pipes can be blocked or directly installed with a multi-dimensional nozzle.

[0043] As shown in the technical scheme, Figure 5As shown in the technical scheme, the fluid emitted by the multi-dimensional nozzle 212 is divergent, and the multi-dimensional nozzle 212 has a one-way valve core 2121 inside, so that the slag cannot enter the multi-dimensional nozzle to cause the multi-dimensional nozzle to be blocked or stuck, and the slurry making effect of the multi-dimensional nozzle is improved. Specifically, the structure of the multi-dimensional nozzle 212 in the embodiment is similar to the structure disclosed in the document CN222311508U “Multi-dimensional flow slurry making nozzle”. Specifically, the multi-dimensional nozzle 212 includes a first valve shell 2122, a one-way valve core 2121 and a spring 2123. The first valve shell is a groove body, and an annular first valve seat 2124 is protruded on the inner wall of the first valve shell. The groove bottom wall and the side wall of the first valve shell each have a plurality of perforations 2125 (so that the fluid emitted by the multi-dimensional nozzle is divergent, so that the mineral slurry on the inner bottom wall of the water tank 1 and the buffer collection groove 11 can flow in a flow state under the action of the fluid emitted by the multi-dimensional nozzle, thereby improving the sludge discharge effect in the water tank). The spring and the one-way valve core are installed in the first valve shell, and the one-way valve core tends to abut against the inner hole of the first valve seat under the action of the spring to block the first valve shell.

[0044] The fluid emitted by the slurry making device in the embodiment can be air flow (at this time, the slurry making device further includes an air compressor, the air outlet of the air compressor is connected and communicated with the inlet end of the jet pipeline, and the air compressor is used to supply air flow to the jet pipeline) or water flow (at this time, the slurry making device further includes a water pump, the water outlet of the water pump is connected and communicated with the inlet end of the jet pipeline, and the water pump is used to supply water flow to the jet pipeline).

[0045] As shown in the technical scheme, Figure 2 In the embodiment, the jet pipeline in the buffer collection groove can be a single pipeline disc arranged on the inner bottom wall of the buffer collection groove (and a plurality of multi-dimensional nozzles are arranged on the pipeline in the length direction), and one end of the pipeline is sealed, and the other end constitutes the inlet end of the pipeline.

[0046] In the technical scheme, the slurry pump 3 is a submersible slurry pump, and the slurry pump 3 is placed in the buffer collection groove 11, so that the operation effect of the slurry pump is good (in the embodiment, the slurry pump can use a hydraulic motor as a power member, so that the torque is large and the lift is high).

[0047] In the technical scheme, the bottom wall of the water tank 1 is inclined or conical, and the buffer collection groove 11 is located at the lowest horizontal position of the bottom wall of the water tank 1, so that the flow slurry in the water tank can flow into the buffer collection groove by itself. In the embodiment, the bottom wall of the water tank is inclined or conical, but the inclination angle of the bottom wall is not too large (preferably 2-5°).

[0048] As shown in the technical scheme, Figure 1As shown, in the above technical solution, at least one-way valve 61 is installed on the conveying pipeline 6. This allows the one-way valve to prevent the backflow of slurry in the conveying pipeline when the mud pump stops operating, thus protecting the mud pump valve box. Specifically, as... Figures 7-9 As shown, the one-way valve in this embodiment includes a second valve housing 611, a valve ball 612, and a second valve seat 613. The upper and lower ends of the second valve housing 611 are open and form interfaces. The upper interface is the discharge interface 6111, and the lower interface is the feed interface 6112. The middle part of the second valve housing 611 expands outward in a spherical shape. Multiple circumferentially spaced ribs 614 are vertically arranged inside the second valve housing 611. The upper ends of the multiple ribs 614 are located inside the discharge interface 6111 and extend close to each other. The valve ball 612 is inserted into the second valve housing 611 through the feed interface 6112 and is located between the multiple ribs 614. The upper bends of the ribs 614 together limit the upward movement of the valve ball 612. The second valve seat 613 is annular and is embedded in the feed inlet 6112. The diameter of the inner hole of the second valve seat 613 is smaller than the diameter of the valve ball 612. This allows the valve ball 612 to fall to the upper end of the second valve seat 613 under the action of gravity and block the inner hole of the second valve seat 613 (at this time, it cuts off the flow of the one-way valve). When there is feed pressure at the feed inlet 6112, the feed pressure pushes the valve ball 612 upward and separates it from the second valve seat 613. At this time, the one-way valve is in the conducting state.

[0049] In this embodiment, when sludge passes through the one-way valve, the valve ball is in a rotating state. Even when the sludge causes wear on the valve ball, the wear on all parts of the valve ball remains consistent, thus ensuring the one-way valve's durability. Figure 2 As shown, the buffer collection tank 11 in the above technical solution is provided with a filter element 12. The filter element 12 is used to prevent coarse slag from being sucked into the slurry pump 3. This can prevent coarse slag from entering the slurry pump and causing damage to the blades of the slurry pump. In this embodiment, the filter element can be a grid plate, which is vertically arranged in the buffer collection tank and divides the buffer collection tank into two chambers. The slurry pump is located in one chamber, and the slurry in the water tank flows to the other chamber by itself. Alternatively, the filter element can be birdcage shaped, and the inlet end of the slurry pump is wrapped in the filter element.

[0050] like Figure 6As shown in the technical scheme, the buffer stirring tank 4 comprises a tank body 41, a stirring paddle 42 and a driving motor 43, the feeding port 411 is arranged at the upper end of the tank body 41, the discharging port 412 is arranged at the lower end of the tank body 41, the stirring paddle 42 is vertically arranged in the tank body 41, and the upper end of the paddle shaft 421 of the stirring paddle 42 is sealingly and rotatably arranged outside the tank body 41, the driving motor 43 is installed at the upper end of the tank body 41 and is in transmission connection with the upper end of the paddle shaft 421 (the stirring paddle 42 comprises a paddle shaft and a paddle blade 422 arranged at the lower end of the paddle shaft 421), the driving motor can be a speed reducer, the buffer stirring tank 4 has simple structure, and the driving motor can drive the stirring paddle to rotate to prevent the slurry in the tank body from being stratified by sedimentation, and a valve can be arranged at the discharging port in the embodiment.

[0051] The above is only a preferred embodiment of the present application, and does not limit the present application in any form; any person skilled in the art can easily implement the present application according to the above description and the drawings; however, any equivalent changes, modifications and evolutions made by any person skilled in the art within the scope of the technical scheme of the present application, using the above disclosed technical content, are equivalent embodiments of the present application; meanwhile, any equivalent changes, modifications and evolutions made according to the essential technical of the present application are still within the protection scope of the technical scheme of the present application.

Claims

1. A mine sump sludge removal assembly, characterized by, The invention relates to a slurry preparation device, which comprises a water tank (1), a slurry preparation device (2), a slurry pump (3), a buffer mixing tank (4), a mud pump (5) and a conveying pipeline (6), wherein a buffer collecting groove (11) is concavely arranged on the bottom wall of the water tank (1), the buffer mixing tank (4) and the mud pump (5) are arranged beside the water tank (1), the buffer mixing tank (4) has a feeding port (411) and a discharging port (412), the outlet end of the slurry pump (3) is communicated with the feeding port (411) of the buffer mixing tank (4), the inlet end of the mud pump (5) is communicated with the discharging port (412) of the buffer mixing tank (4), the outlet end of the mud pump (5) is connected with and communicated with one end of the conveying pipeline (6), the inlet end of the slurry pump (3) is used to suck the mud in the buffer collecting groove (11), and the slurry preparation device (2) is used to fluidize the mineral mud deposited in the water tank (1) and the buffer collecting groove (11) into a flow state.

2. The mine sump sludge removal assembly of claim 1, wherein, The slurry preparation device (2) comprises two slurry preparation pipe networks (21), one of which is arranged on the bottom wall of the water tank (1), and the other of which is arranged on the bottom wall of the buffer collecting groove (11).

3. The mine sump sludge removal assembly of claim 2, wherein, The slurry preparation pipe network (21) comprises a jet pipeline (211) and a plurality of multidimensional nozzles (212), the jet pipeline (211) has an inlet end, and the plurality of multidimensional nozzles (212) are installed on the jet pipeline (211) and communicated with the jet pipeline (211).

4. The mine sump sludge removal assembly of claim 3, wherein, The jet pipeline (211) in the water tank (1) comprises a main pipe (2111) and a plurality of branch pipe portions (2112), the plurality of branch pipe portions (2112) are arranged in zones on the bottom wall of the water tank (1), each branch pipe portion (2112) is connected with and communicated with the main pipe (2111) and is provided with a switching valve (2113) at the communicated position, and a plurality of multidimensional nozzles (212) are arranged on each branch pipe portion (2112) in an interval.

5. A mine sump sludge removal assembly according to claim 3 or 4, characterised in that, The fluid jetted from the multidimensional nozzle (212) is divergent, and the multidimensional nozzle (212) has a one-way valve core (2121) inside.

6. The mine sump sludge removal assembly of claim 1, wherein, The slurry pump (3) is a submersible slurry pump, and the slurry pump (3) is placed in the buffer collecting groove (11).

7. The mine sump sludge removal assembly of claim 1, wherein, The bottom wall of the water tank (1) is inclined or conical, and the buffer collecting groove (11) is located at the lowest level of the bottom wall of the water tank (1).

8. The mine sump sludge removal assembly of claim 1, wherein, At least one one-way valve (61) is arranged on the conveying pipeline (6).

9. The mine sump sludge removal assembly of claim 1, wherein, A filter (12) is arranged in the buffer collecting groove (11), and the filter (12) is used to prevent the coarse mineral slag from being sucked into the slurry pump (3).

10. The mine sump sludge removal assembly of claim 1, wherein, The buffer stirring tank (4) comprises a tank body (41), a stirring paddle (42) and a driving motor (43), the inlet (411) is arranged at the upper end of the tank body (41), the outlet (412) is arranged at the lower end of the tank body (41), the stirring paddle (42) is vertically arranged in the tank body (41), and the upper end of the paddle shaft (421) of the stirring paddle (42) is sealingly and rotatably arranged outside the tank body (41), and the driving motor (43) is installed at the upper end of the tank body (41) and is in transmission connection with the upper end of the paddle shaft (421).

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