Leakage-proof discharging device of double-stirring mixing and kneading pot

Abstract

The utility model belongs to the technical field of electrode paste production equipment, and discloses a double-stirring mixing and kneading pot anti-leakage discharging device which comprises a spiral feeder, a mixing and kneading pot cover body, a material guide pipe and a powder anti-leakage assembly, a discharging opening is formed in the top of the mixing and kneading pot cover body, the lower end of the material guide pipe is connected with the discharging opening, and one side of the upper end of the material guide pipe communicates with the spiral feeder; the powder leakage-proof assembly comprises a material receiving hopper and a powder conveying mechanism, the material receiving hopper is arranged at the connecting position of the material guide pipe and the discharging opening in a sleeving mode and used for receiving powder flowing out of the connecting position, and environmental pollution caused by direct feeding under the condition that the mixing and kneading pot is opened is avoided; a powder circulating outlet is formed in the bottom of the material receiving hopper, a powder circulating inlet is formed in the upper end of the material guide pipe, the powder conveying mechanism communicates the powder circulating inlet with the powder circulating outlet from the outside of the material guide pipe, and the powder conveying mechanism is used for conveying powder in the material receiving hopper back to the material guide pipe, so that the problem that the proportion of dry materials in the mixing and kneading pot is not uniform due to loss of the powder is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of electrode paste production equipment, and in particular relates to a leakage-proof material discharge device for a double-stirring kneading pot. Background Art

[0002] The production process of electrode paste mainly involves mixing and stirring dry materials such as graphite and coal used for conductivity and wet materials such as medium-temperature asphalt used as a binder in strict proportion into a homogeneous paste, and then forming blocks through compression molding, demoulding, and cooling to be used as electrodes in a submerged arc furnace. During the kneading process, a kneading pot is required to mix and stir the materials. Whether the kneading pot can fully play its role in stirring and mixing determines the quality of the finished electrode paste.

[0003] In the prior art, a double stirring kneading pot is used. The kneading pot is designed with upper and lower layers, and a reamer is arranged inside each layer. The upper layer is provided with an open feeding port for feeding dry materials, and the lower layer is provided with wet materials. After both materials meet the process requirements, they are fully mixed and stirred to obtain a uniform electrode paste. Since the upper layer feeding process is carried out in a non-sealed structure, the following problems are prone to occur: the dry material is prone to raise a large amount of powder during the feeding process, and the powder overflows from the non-sealed interface of the kneading pot, resulting in continuous loss of dry material, which not only causes pollution to the working environment, but also causes uneven dry material ratio in the kneading pot due to the large amount of powder loss, reducing the quality of the electrode paste product. Summary of the invention

[0004] Based on the above-mentioned background technical needs, the present application provides a leakage-proof material discharge device for a double-stirring kneading pot, which is used to solve the problem that a large amount of powder is easily raised during the discharge process of dry materials, and the powder escapes from the non-sealed interface of the kneading pot, resulting in continuous loss of dry materials, which not only causes pollution to the working environment, but also the large loss of powder leads to uneven proportion of dry materials in the kneading pot, thereby reducing the quality of electrode paste products.

[0005] In order to achieve the above purpose, the technical solution of this application is:

[0006] A leakage-proof material discharge device for a double-stirring kneading pot comprises a spiral feeder, a kneading pot cover, a material guide pipe and a powder leakage-proof component, wherein the kneading pot cover is provided with a material discharge port, one end of the material guide pipe is connected with the material discharge port along the gravity direction, and one end of the material guide pipe away from the material discharge port is connected with the discharge port of the spiral feeder, and the powder leakage-proof component comprises a material receiving hopper and a powder conveying mechanism, the material receiving hopper is sleeved at the connection between the material guide pipe and the material discharge port, the material receiving hopper is used to receive the powder flowing out from the connection between the material guide pipe and the material discharge port, and a powder circulation outlet is provided at the bottom of the material receiving hopper; a powder circulation inlet is provided at one end of the material guide pipe away from the material discharge port, the powder conveying mechanism connects the powder circulation inlet with the powder circulation outlet from the outside of the material guide pipe, and the powder conveying mechanism is used to return the powder in the material receiving hopper to the material guide pipe.

[0007] Preferably, the powder conveying mechanism includes a powder pumping pump and a conveying pipe, the discharge end of the powder pumping pump is connected to the powder circulation inlet, the feed end of the powder pumping pump is connected to the powder circulation outlet through the conveying pipe, and an air intake valve is provided on the side of the receiving hopper away from the powder circulation outlet.

[0008] Preferably, the bottom surface of the receiving hopper is an inclined surface, and the powder circulation outlet is arranged adjacent to the lowest point of the bottom surface of the receiving hopper.

[0009] Preferably, the powder leakage prevention assembly further comprises a vibrator, elastic sealing rings are respectively provided at the connection between the material receiving hopper and the material guiding pipe and / or the kneading pot cover, and the vibrator is drivingly connected to the material receiving hopper.

[0010] Preferably, a baffle is provided on one side of the kneading pot cover body opposite to the discharge port, a plurality of discharge holes are provided on the baffle, a first drive shaft is rotatably provided in the material guide tube, the first drive shaft extends into the discharge port in a vertical direction, and the axis of the first drive shaft is located at the contour center of the upper surface of the baffle, a material shifting rod is provided at one end of the first drive shaft adjacent to the baffle, at least one side of the material shifting rod is in slidable contact with the baffle, and the material shifting rod is used to shift the powder material through the discharge hole.

[0011] Preferably, the length of the material moving rod is not less than the maximum distance from the center of the contour to the edge of the contour on the upper surface of the baffle.

[0012] Preferably, the material-moving rod comprises an arc-shaped rod, a side surface of the arc-shaped rod perpendicular to the baffle is a convex arc surface, and the rotation direction of the first driving shaft is consistent with the convex direction of the convex arc surface.

[0013] Preferably, a second driving shaft is rotatably sleeved on one end of the first driving shaft adjacent to the screw feeder, and a plurality of fins are circumferentially arranged on one end of the second driving shaft, and the fins are used to disperse powder.

[0014] Preferably, a dry material dispersion portion is provided in the middle section of the first driving shaft, the dry material dispersion portion is in the form of a cone, and a guide groove is provided on the conical surface of the dry material dispersion portion, and the guide groove is in a right spiral structure.

[0015] Preferably, the baffle is connected to the kneading pot cover body via an elastic connecting piece.

[0016] By adopting the above technical solution, compared with the prior art, the present application has at least the following beneficial effects:

[0017] The screw feeder, the material guide pipe, the kneading pot cover and the double-stirring kneading pot are connected to avoid environmental pollution caused by feeding directly when the double-stirring kneading pot is open; the receiving hopper can collect the powder overflowing from the feeding port to prevent waste and pollution of the working environment; the powder conveying mechanism returns the powder to the material guide pipe to avoid the problem of uneven ratio of dry material and wet material in the double-stirring kneading pot caused by the loss of a large amount of powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a schematic diagram of the structure of the leakage-proof material discharge device of the double stirring kneading pot in the first embodiment.

[0019] Figure 2 It is a schematic diagram of the structure of the leakage-proof material discharge device of the double stirring kneading pot in the second embodiment.

[0020] Figure 3 It is a partial schematic AA cross-sectional view of the leakage-proof material discharge device of the double stirring kneading pot in any embodiment.

[0021] Figure 4 It is a partial enlarged view of position B of the leakage-proof material discharge device of the double stirring and kneading pot in any embodiment.

[0022] In the figure: a screw feeder 10, a kneading pot cover 20, a feed port 21, a baffle 22, a feed hole 221, an elastic connector 222, a material guide pipe 30, a first drive shaft 31, a material lever 311, a first drive motor 312, a dry material dispersion portion 313, a guide groove 3131, a second drive shaft 32, a wing 321, a second drive motor 322, a powder leakage prevention component 40, a hopper 41, an air inlet valve 411, an elastic sealing ring 412, a powder conveying mechanism 42, a powder pumping pump 421, a feed pipe 422, a vibrator 43, and a kneading pot 50. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The technical solution of the present application will be further described below in conjunction with the drawings of the embodiments of the present application, and the present application is not limited to the following specific implementation methods.

[0024] It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present application, it should be understood that if there are terms such as "upper", "lower", "inner", "outer", "left", "right", "front", "rear", "top", "bottom" and the like indicating directions or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the structure or component referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on the present patent, and for those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0025] The following is combined with Figure 1 To Attachment Figure 4 And specific embodiments further describe the present application in detail.

[0026] In the present application, a leakage-proof feeding device for a double-stirring kneading pot is disclosed, the device comprises a screw feeder 10, a kneading pot cover 20, a guide pipe 30 and a powder leakage-proof assembly 40, wherein the kneading pot cover 20 is used to cover the upper open portion of the double-stirring kneading pot, the kneading pot cover 20 is provided with a feeding port 21, the lower end of the guide pipe 30 is connected to the feeding port 21 along the gravity direction, and the discharge port of the screw feeder 10 is inserted into one side of the upper end of the guide pipe 30, so that the interior of the guide pipe 30, the upper space of the kneading pot 50 and the screw feeder 10 are connected to form a conveying dry The powder leakage prevention component 40 includes a receiving hopper 41 and a powder conveying mechanism 42. The receiving hopper 41 is sleeved at the connection between the guide pipe 30 and the discharge port 21. The receiving hopper 41 is used to receive the powder flowing out from the connection between the guide pipe 30 and the discharge port 21. A powder circulation outlet is provided at the bottom of the receiving hopper 41; a powder circulation inlet is provided on one side of the upper end of the guide pipe 30, and the powder conveying mechanism 42 connects the powder circulation inlet and the powder circulation outlet from the outside of the guide pipe 30. The powder conveying mechanism 42 is used to return the powder in the receiving hopper 41 to the guide pipe 30.

[0027] Specifically, the receiving hopper 41 includes a hopper body, a hopper bottom and a hopper cover. The hopper body is a hollow cylinder or an inverted frustum, and the hopper body is covered by the hopper cover and / or the hopper bottom and is arranged at the connection between the material guide pipe 30 and the discharge port 21 to form a sealable accommodating space to collect the powder escaping from the discharge port 21; the powder conveying mechanism 42 includes a negative pressure feeding mechanism or a lifting feeding mechanism, which is used to guide the powder in the receiving hopper 41 upward into the material guide pipe 30 again.

[0028] When the above device is used, dry materials are transported to the kneading pot 50 (referring to a double stirring kneading pot or a double-layer kneading pot, which will not be described in detail below) through the screw feeder 10, and the dry materials enter the kneading pot 50 through the material guide pipe 30. After the receiving hopper 41 collects the powder flowing out or escaping from the discharge port 21, the powder is then sent back to the material guide pipe 30 through the powder conveying mechanism 42.

[0029] The use of the double stirring kneading pot leakage-proof material feeding device can achieve at least the following technical effects:

[0030] The screw feeder 10, the material guide pipe 30, the kneading pot cover 20 and the kneading pot 50 are connected to avoid environmental pollution caused by feeding directly when the kneading pot 50 is open; the receiving hopper 41 can collect the powder overflowing from the discharge port 21 to prevent waste and pollution of the working environment; the powder conveying mechanism 42 returns the powder to the material guide pipe 30 to avoid the problem of uneven ratio of dry material and wet material in the kneading pot 50 caused by the loss of a large amount of powder.

[0031] In addition, the present application also provides some more specific implementation methods to improve the leakage-proof material discharge device of the double stirring kneading pot. Example

[0032] Furthermore, in order to improve the efficiency of circulating and conveying the powder back into the guide pipe 30, the above-mentioned powder conveying mechanism 42 includes a powder pumping pump 421 and a conveying pipe 422, the discharge end of the powder pumping pump 421 is connected to the powder circulation inlet, and the discharge end of the powder pumping pump 421 is connected to the powder circulation outlet through the conveying pipe 422; and an air intake valve 411 is provided on the side of the receiving hopper 41 away from the powder circulation outlet.

[0033] Specifically, the powder pumping pump 421 is a one-way pump, which is used to feed the powder to the powder circulation inlet; the air intake valve 411 is a one-way air intake valve, which is arranged on the cover of the receiving hopper 41. When the powder pumping pump 421 conveys powder to the feed pipe, the air intake valve 411 opens under the influence of negative pressure, so that the receiving hopper 41 is connected to the atmosphere, so as to ensure that there is sufficient pressure in the receiving hopper 41 to allow the powder to flow to the feed guide pipe 30.

[0034] Furthermore, to ensure that most of the powder in the receiving hopper 41 can be transported back to the material guide pipe 30 , the bottom surface of the receiving hopper 41 is inclined, and the powder circulation outlet is arranged near the lowest position of the bottom surface of the receiving hopper 41 .

[0035] During use of the above device, the powder overflowing from the discharge port 21 gathers at the powder circulation outlet so as to be quickly sucked out of the receiving hopper 41 by the powder pumping pump 421 , thereby reducing the residual amount of powder in the receiving hopper 41 .

[0036] Furthermore, in order to prevent the powder circulation outlet from being blocked by powder, the powder leakage prevention component 40 also includes a vibrator 43, and elastic sealing rings 412 are respectively provided at the connection between the material receiving hopper 41 and the material guiding pipe 30 and / or the kneading pot cover body 20, and the vibrator 43 is transmission-connected to the material receiving hopper 41.

[0037] Specifically, the elastic sealing ring 412 is a rubber ring or a silicone ring with high elasticity and ductility.

[0038] When the above-mentioned device is unloading or the powder pumping pump 421 is started, the above-mentioned vibrator 43 is started at the same time. The vibrator 43 vibrates the powder in the hopper 41 at a low frequency, which can not only make the powder quickly gather at the powder circulation outlet so as to be sucked out by the powder pumping pump 421, but also make it difficult for the powder to be compacted in the hopper 41 and cause the powder circulation outlet to be blocked; the elastic sealing ring 412 can keep the connection between the hopper 41 and the guide pipe 30 and the kneading pot cover body 20 sealed, and can reduce the vibration transmitted from the hopper 41 to the guide pipe 30, so that the guide pipe 30 can unload the material normally.

[0039] Furthermore, in order to solve the problem of material loss or reduced material discharge efficiency caused by a large amount of dry materials being piled up too high in a local area on the upper layer of the kneading pot 50, a baffle 22 is provided on one side of the kneading pot cover 20 relative to the discharge port 21, and a plurality of discharge holes 221 are provided on the baffle 22. A first driving shaft 31 is rotatably provided in the material guide pipe 30, and the first driving shaft 31 extends into the discharge port 21 in a vertical direction, and the axis of the first driving shaft 31 is located at the center of the contour of the upper surface of the baffle 22. A material shifting rod 311 is provided at one end of the first driving shaft 31 adjacent to the baffle 22, and at least one side of the material shifting rod 311 is slidably in contact with the baffle 22, and the material shifting rod 311 is used to shift the powder material through the discharge hole 221.

[0040] Specifically, the upper surface of the baffle 22 has a circular or elliptical contour, the baffle 22 is disposed at the bottom of the kneading pot cover 20, and the area covered by the baffle 22 can completely receive the powder dropped from the discharge port 21; a first drive motor 312 is disposed at the upper end of the material guide cylinder, and the first drive motor 312 is transmission-connected to the first drive shaft 31 to drive the first drive shaft 31 to drive the material removing rod 311 to scrape or drive away the powder remaining on the baffle 22, so that the powder enters the kneading pot 50 through the discharge hole 221 or the edge of the baffle 22.

[0041] When the above device is used, the powder is fed into the guide pipe 30 by the screw feeder 10 and then falls onto the upper surface of the baffle 22. Under the rotation of the material-moving rod 311, the powder is driven to disperse and evenly enter the kneading pot 50 through the discharge hole 221 on the baffle 22, thereby avoiding the problem that a large amount of powder is accumulated too high in a local area of ​​the upper layer of the kneading pot 50, resulting in the loss of powder from the discharge port and the reduction of discharge efficiency; and after the powder is dispersed and falls from the edge of the baffle 22 and the discharge hole 221 into the kneading pot 50, the problem of uneven distribution and compaction is avoided, which can make it easier to mix the dry material and the wet material, reduce the stirring and mixing time to a certain extent, and slow down the wear of the reamer and the lining in the kneading pot 50.

[0042] Furthermore, in order to prevent the powder from accumulating on the upper part of the baffle 22, the length of the material-moving rod 311 is not less than the maximum distance from the center of the contour to the edge of the contour of the upper surface of the baffle 22. During the rotation process, the material-moving rod 311 can drive the dry material on the baffle 22 to the maximum extent, so that the dry material enters the kneading pot 50 from the edge of the baffle 22 and the discharge hole 221.

[0043] Furthermore, in order to improve the efficiency of the powder entering the kneading pot 50 under the push of the material pushing rod 311, the above-mentioned material pushing rod 311 includes an arc-shaped rod, and the side surface of the arc-shaped rod is perpendicular to the baffle 22 and is an arc-shaped surface, and the arc-shaped surface is a convex arc surface, and the rotation direction of the first drive shaft 31 is consistent with the convex direction of the convex arc surface.

[0044] When the above device is used, the first driving motor 312 drives the arc rod to rotate in the direction where the arc surface convexes. During the rotation of the arc rod, the convex arc surface thereof scrapes the baffle plate 22 and drives away the dry materials on the baffle plate 22, so that the dry materials that do not have time to fall from the kneading pot 50 through the discharge hole 221 move toward the outside of the baffle plate 22 along the arc line of the convex arc surface. Under the action of the material moving rod 311, a part of the dry materials is thrown down from the gap between the side of the baffle plate 22 and the inner wall of the kneading pot 50, which not only improves the efficiency of the dry materials entering the kneading pot 50, but also further avoids the local accumulation of the dry materials on the upper layer of the kneading pot 50, so that the dry materials are evenly distributed.

[0045] Furthermore, in order to improve the uniformity of the distribution of the dry material on the baffle 22, the first drive shaft 31 is rotatably sleeved with a second drive shaft 32 at one end adjacent to the screw feeder 10, and a plurality of fins 321 are circumferentially arranged at one end of the second drive shaft 32 for dispersing the dry material.

[0046] Specifically, the second drive shaft 32 is a hollow shaft with an inner diameter larger than the outer diameter of the first drive shaft 31. The second drive shaft 32 is arranged on the upper end of the first drive shaft 31 through a bearing sleeve, and the upper end of the second drive shaft 32 is connected to the second drive motor 322 through a bevel gear set. The second drive motor 322 is used to drive the second drive shaft 32 to rotate the vane 321, and the rotation speed of the second drive shaft 32 is higher than the rotation speed of the first drive shaft 31.

[0047] When the above device is used, after the dry material is fed into the guide pipe 30 by the screw feeder 10 and before reaching the baffle 22, it is broken up by the high-speed rotating fins 321, making the dry material particles more discrete, thereby improving the efficiency of the dry material entering the kneading pot 50 through the discharge hole 221.

[0048] Furthermore, in order to avoid congestion when the dry material passes through the discharge hole 221, the baffle 22 is connected to the kneading pot cover body 20 through an elastic connecting member 222 such as a spring, an elastic telescopic rod, etc.

[0049] When the material removing rod 311 continuously scrapes the upper surface of the baffle 22 during rotation, the baffle 22 vibrates at a low frequency under the action of the elastic connecting piece 222 and generates vibrations to the dry material, thereby preventing the dry material from being blocked at the discharge hole 221 and improving the efficiency of the dry material passing through the discharge hole 221. Example

[0050] Based on part of the first embodiment, the second embodiment is different in that:

[0051] In order to replace the effect that can be achieved by the wing 321 in the first embodiment, a dry material dispersion portion 313 is provided in the middle section of the first drive shaft 31. The dry material dispersion portion 313 is cone-shaped, and a guide groove 3131 is provided on the conical surface of the dry material dispersion portion 313. The guide groove 3131 is a right spiral structure from top to bottom.

[0052] When the above device is used, the dry material is dispersed along the generatrix by the cone in the process of passing through the guide pipe from top to bottom, and is not easy to fall on the middle area of ​​the baffle 22. In addition, during the rotation of the dry material dispersion part 313, a downward vortex is generated through the guide groove 3131 with a right spiral structure, so that the dry material is dispersed to the surroundings under the disturbance of the vortex, thereby further improving the discreteness of the dry material and avoiding local accumulation of the dry material.

[0053] In combination with the multiple structures and features of the above-mentioned embodiments, the dry material entering the kneading pot 50 can be pre-processed so that the dry material falls onto the baffle 22 in a relatively discrete state, so that the dry material can be quickly dispersed and fall onto the upper layer of the kneading pot 50 through the discharge holes 221 or be scraped off from the edge of the baffle 22 by the material removal rod 311, thereby ensuring the efficiency of the dry material entering the kneading pot 50 and preventing the dry material from accumulating above the baffle 22.

[0054] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation methods of the present application. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A leakage-proof feeding device for a double-stirring kneading pot, comprising a screw feeder and a kneading pot cover, characterized in that: Also includes, A material guide pipe, the kneading pot cover is provided with a material discharge port, one end of the material guide pipe is connected to the material discharge port along the gravity direction, and one end of the material guide pipe away from the material discharge port is connected to the material discharge port of the screw feeder; as well as A powder leakage prevention component, the powder leakage prevention component includes a material receiving hopper and a powder conveying mechanism, the material receiving hopper is sleeved at the connection between the material guide pipe and the discharge port, the material receiving hopper is used to receive the powder flowing out from the connection between the material guide pipe and the discharge port, and a powder circulation outlet is provided at the bottom of the material receiving hopper; a powder circulation inlet is provided at one end of the material guide pipe away from the discharge port, the powder conveying mechanism connects the powder circulation inlet with the powder circulation outlet from the outside of the material guide pipe, and the powder conveying mechanism is used to return the powder in the material receiving hopper to the material guide pipe.

2. The leakage-proof material feeding device for double stirring kneading pots according to claim 1 is characterized in that: The powder conveying mechanism includes a powder pumping pump and a conveying pipe. The discharge end of the powder pumping pump is connected to the powder circulation inlet, and the feed end of the powder pumping pump is connected to the powder circulation outlet through the conveying pipe. An air intake valve is provided on the side of the receiving hopper away from the powder circulation outlet.

3. The leakage-proof material feeding device for double stirring kneading pots according to claim 2 is characterized in that: The bottom surface of the receiving hopper is an inclined surface, and the powder circulation outlet is arranged adjacent to the lowest point of the bottom surface of the receiving hopper.

4. The leakage-proof material feeding device for double stirring kneading pots according to claim 1 is characterized in that: The powder leakage prevention assembly also includes a vibrator. Elastic sealing rings are respectively arranged at the connection between the material receiving hopper and the material guiding pipe and / or the kneading pot cover body. The vibrator is drivingly connected to the material receiving hopper.

5. The leakage-proof material feeding device for double stirring kneading pots according to claim 1 is characterized in that: A baffle is provided on one side of the kneading pot cover body opposite to the discharge port, and a plurality of discharge holes are provided on the baffle. A first driving shaft is rotatably provided in the material guide tube, and the first driving shaft extends into the discharge port in a vertical direction, and the axis of the first driving shaft is located at the center of the contour on the upper surface of the baffle. A material shifting rod is provided at one end of the first driving shaft adjacent to the baffle, and at least one side of the material shifting rod is slidably in contact with the baffle, and the material shifting rod is used to shift the powder material through the discharge hole.

6. The leakage-proof material feeding device for double stirring kneading pots according to claim 5 is characterized in that: The length of the material-moving rod shall not be less than the maximum distance from the center of the contour to the edge of the contour on the upper surface of the baffle.

7. The leakage-proof material feeding device for double stirring kneading pots according to claim 6 is characterized in that: The material-moving rod comprises an arc-shaped rod, a side surface of the arc-shaped rod perpendicular to the baffle is a convex arc surface, and the rotation direction of the first driving shaft is consistent with the convex direction of the convex arc surface.

8. The leakage-proof material feeding device for double stirring kneading pots according to claim 5, characterized in that: The first driving shaft is rotatably sleeved with a second driving shaft at one end adjacent to the screw feeder, and a plurality of fins are circumferentially arranged at one end of the second driving shaft, and the fins are used to disperse powder.

9. The leakage-proof material feeding device for double stirring kneading pots according to claim 5, characterized in that: A dry material dispersing portion is provided in the middle section of the first driving shaft. The dry material dispersing portion is in a cone shape, and a guide groove is provided on the conical surface of the dry material dispersing portion. The guide groove is in a right spiral structure.

10. The leakage-proof material feeding device for double stirring kneading pots according to claim 5, characterized in that: The baffle is connected to the kneading pot cover body through an elastic connecting piece.

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