Vacuum chamber with double-propulsion material distributing device

Abstract

The invention discloses a vacuum chamber with a double-propulsion material distribution device, and belongs to the technical field of vacuum pugging, the vacuum chamber comprises a pug feeding mechanism and a vacuum pugging chamber which are communicated with each other through a material distribution sieve plate, two pugging propulsion lines are arranged in the vacuum pugging chamber, and the two pugging propulsion lines respectively receive pugs distributed by the material distribution sieve plate. And two pugging propelling lines are integrated in a vacuum cavity of the vacuum pugging chamber. The pug is distributed by the distribution sieve plate and then uniformly falls onto the corresponding pug propulsion lines, and is respectively and independently subjected to homogenization mixing and vacuum degassing treatment, and finally the pug is molded by the distribution lines and then pushed out. The capacity expansion of the vacuum pugging equipment is realized through double-line independent treatment, the production efficiency is improved, and the high integration degree of double lines ensures that the floor area expansion rate of the equipment is extremely low. Due to the fact that the pug of the double lines is processed in parallel after being distributed, the independent operation mode ensures the processing quality of the pug of each single line, and the homogenization and degassing effects are guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of vacuum clay kneading, and specifically relates to a vacuum chamber with a double-push material distribution device. Background Art

[0002] In the field of raw material processing in industries such as ceramics, refractories, building materials, etc., the clay kneader, as the core equipment, undertakes the key processes of homogenizing, degassing, and extrusion molding of plastic raw materials. Traditional clay kneaders generally adopt a single-line series structure design, that is, receiving raw materials through a single feed inlet, and pushing the materials through processing units such as a vacuum chamber and an extrusion cavity in sequence by a spiral auger or a hydraulic system, and finally outputting the formed clay through a single outlet.

[0003] In the prior art, to meet the demand for large-scale production, enterprises usually adopt the following two solutions: one is to increase the processing capacity on a single device by increasing the device specifications (such as lengthening the auger shaft and expanding the cavity volume), but limited by material strength, the bearing capacity of the power system, and the device volume, there is an obvious ceiling for the increase in production capacity; the other is to configure multiple independent clay kneaders in parallel to form multiple production lines. Although this solution can achieve the superposition of production capacity, it leads to problems such as doubling the equipment procurement cost, significantly increasing the floor area, significantly rising energy consumption, and increasing the complexity of equipment maintenance, seriously restricting the production efficiency.

[0004] Some improved devices install a material distribution cylinder at the outlet, and automatically distribute the material through the thrust of the clay and die splitting, realizing the parallel production of two production lines on a single device. For example, the patent with the publication number CN213107405U provides a double-outlet clay kneading and clay bar cutting integrated device, which can extrude two clay bars at the same time through double discharge pipes and double discharge nozzles, and can perform operations such as adsorbing, cutting, and reversing the direction of the two clay bars at the same time.

[0005] Although the above structure can achieve double-line compatibility and parallel operation, it increases the load of the spiral auger and the driving mechanism, and essentially realizes material distribution by increasing the device specifications. The contradiction between the increase in the single-time processing volume of the clay and the device load leads to a reduction in the homogenization effect during the clay processing process, a significant increase in viscosity differences, feeding rate fluctuations, etc., and then leads to significant deviations in the density, moisture content, and homogenization degree of the clay at the two discharge outlets, making it difficult to meet the requirements of the high-precision forming process for the consistency of the clay, and it is also necessary to repeatedly put it into the clay kneader for reprocessing, and the production efficiency has not been significantly improved. Summary of the Invention

[0006] The purpose of the present invention is to provide a vacuum chamber with a double-push material distribution device to solve the problems mentioned in the above prior art.

[0007] Provide a vacuum chamber with a double-push material distribution device, including:

[0008] A mud feeding mechanism and a vacuum pug mill chamber that are interconnected by a material distributing sieve plate, wherein two pugging propulsion lines are arranged in the vacuum pug mill chamber, and the two pugging propulsion lines respectively receive the mud material after being distributed by the material distributing sieve plate.

[0009] As a further solution of the present invention: the pugging propulsion line includes a feeding screw and a feeding cylinder, and the side of the feeding cylinder that receives the mud material is an arc surface structure that is concave in the direction away from the material distributing sieve plate.

[0010] The arc surface structure creates an avoidance space for the rotation of the feeding screw, and fits the cross-sectional working areas of the feeding screw and the spiral reamer, avoiding the occurrence of dead zones in mud material processing. In addition, the arc surface structures of the two pugging propulsion lines form independent working areas that have both connection parts and spatial partitions, ensuring that the vacuum pumping treatment of the vacuum pug mill chamber acts on the mud materials on both lines simultaneously, and the cutting and crushing processes will not interfere and mix with each other, integrating the two production lines to the greatest extent.

[0011] As a further solution of the present invention: at least one section of the parallel part that fits is provided at the end of the feeding cylinders of the two pugging propulsion lines close to the material distributing sieve plate.

[0012] This shared section reduces the redundant space occupation through integral molding or welding molding, but still has structural parts that are mutually partitioned. This parallel part is to ensure that the mud material distributed by the material distributing sieve plate can smoothly fall into their respective pugging propulsion lines, minimizing the structural distance of the separating part on the material distributing sieve plate and reducing the probability of the dropped mud material staying in the area between the two pugging propulsion lines.

[0013] As a further solution of the present invention: the contact side walls between the two feeding cylinders and between the feeding cylinders and the vacuum pug mill chamber are integrally formed.

[0014] Integral molding between the two feeding cylinders and between the feeding cylinders and the side walls of the vacuum pug mill chamber can ensure that there are no structural weak points in this area, thereby reducing the risk of breakage and leakage, which may lead to a reduction or even loss of the vacuum pumping effect.

[0015] As a further solution of the present invention: the rotational linear velocity directions of the two feeding screws at the bottom surfaces of the corresponding feeding cylinders are opposite.

[0016] Through this setting, the propulsion effect and shear direction generated by the feeding screw on the mud material tend to the side walls of the vacuum pug mill chamber rather than the adjacent pugging propulsion line, ensuring that the mud materials in the two pugging propulsion lines will not mix and move around each other, and guaranteeing the uniformity of the final discharge amount of the two lines.

[0017] As a further solution of the present invention: combing plates are respectively arranged on the two side walls of the vacuum pug mill chamber opposite to the corresponding feeding cylinders.

[0018] The carding plate is used to cut the mud material into thin strips or small pieces to improve the degassing effect. Based on the fact that the advancing direction of the feeding screw for the mud material is biased towards the side wall of the vacuum pug mill chamber, the carding plate can better perform the cutting and recombination process on the mud material, further disperse and homogenize the water, additives or mineral particles that are not fully mixed in the raw material, eliminate local composition differences, and ensure a high degree of consistency in the moisture content, viscosity and plasticity of the mud material for subsequent extrusion molding.

[0019] As a further solution of the present invention: It further includes two discharge cylinders, and the two discharge cylinders are respectively communicated with the corresponding feeding cylinders.

[0020] The two discharge cylinders can discharge materials independently. And because the discharging processes do not interfere with each other, the two discharge cylinders can adjust their respective discharging angles, providing a larger working space and facilitating reprocessing or transportation.

[0021] As a further solution of the present invention: The material distribution sieve plate includes a partition plate and a plurality of through holes distributed on both sides of the partition plate and penetrating through the material distribution sieve plate.

[0022] The material distribution sieve plate forcibly divides the incoming mud flow into two independent tributaries through the partition plate, blocking the cross-mixing of the double-line mud material and ensuring the process independence. The through-hole areas on both sides of the partition plate form independent flow channels, suppressing the uneven situation of the double-side mud material falling amount caused by the mutual conduction of the pressure fluctuations of the double-line mud material.

[0023] As a further solution of the present invention: The through-hole distribution rate on the material distribution sieve plate is 20% - 35%.

[0024] A certain distance needs to be maintained between the through holes to avoid the pressure coupling effect. The appropriate through-hole distribution rate balances the passing efficiency of the mud material, the strength of the material distribution sieve plate, and the pressure coupling, ensuring that the material distribution sieve plate always discharges and distributes materials evenly.

[0025] As a further solution of the present invention: The through-hole distribution rate on the material distribution sieve plate is 25% - 30%.

[0026] As a further solution of the present invention: At least 95% of the through holes are rectangular rounded-corner holes, and the width-to-length ratio of the rectangular rounded-corner holes is 4 - 9:20.

[0027] As a further solution of the present invention: The width-to-length ratio of the rectangular rounded-corner holes is 5 - 6:20.

[0028] The flexural capacity of the clay strip after extrusion from the through-hole is positively correlated with the moment of inertia of the cross-section. The risk of buckling of the clay strip due to its own weight or external disturbance can be reduced by restricting the aspect ratio. Appropriately reducing the aspect ratio can ensure that the continuous extrusion of the clay strip will not break immediately and cause wall hanging. However, if the aspect ratio is too small, it will lead to uneven distribution of the cross-sectional flow velocity of the clay material when passing through the through-hole and instability, exacerbating the concentration of internal stress and resulting in fracture. The rounded corners around the rectangle can relieve the uneven stress distribution caused by the difference in interlayer flow velocity at the center and edge of the clay strip cross-section, ensure smoother outflow of the clay strip, and reduce the occurrence of fractures.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] Two clay refining propulsion lines are integrated in the vacuum clay refining chamber, and the two clay refining propulsion lines share a vacuum chamber. The clay material pushed by the mud feeding mechanism is evenly dropped onto the corresponding clay refining propulsion line after being divided by the material dividing sieve plate, and is independently subjected to homogenization mixing and vacuum degassing treatment in the two clay refining propulsion lines respectively. Finally, the clay material is shaped and pushed out by separate lines. The capacity expansion of the vacuum clay refining equipment is achieved through dual-line independent processing, improving production efficiency. The high integration degree of the dual lines ensures an extremely low land occupation expansion rate of the equipment. Since the clay materials of the two lines start parallel processing after material division, the independent operation mode ensures the processing quality of each single-line clay material, and the homogenization and degassing effects are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present drawings or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present drawings. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0032] Figure 1 It is a top view of the vacuum chamber with a double propulsion and material dividing device;

[0033] Figure 2 It is a top view internal structure diagram of the vacuum clay refining chamber provided by the present invention;

[0034] Figure 3 It is a side view internal structure diagram of the vacuum clay refining chamber provided by the present invention;

[0035] Figure 4 It is a structural schematic diagram of the material dividing sieve plate provided by the present invention.

[0036] In the figure: 1, mud feeding mechanism; 2, vacuum clay refining chamber; 21, combing plate; 3, material dividing sieve plate; 31, partition plate; 32, through-hole; 4, clay refining propulsion line; 41, feeding screw; 42, feeding cylinder; 5, discharging cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0038] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present invention. For those of ordinary skill in the art, without making creative efforts, the present invention can also be applied to other similar scenarios based on these drawings. In addition, it can also be understood that although the efforts made in such a development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed by the present invention, some design, manufacturing or production changes based on the technical content disclosed by the present invention are only conventional technical means and should not be understood as the content disclosed by the present invention being insufficient.

[0039] However, there will be cases where unnecessary detailed descriptions are omitted. For example, there are cases where detailed descriptions of well-known matters are omitted and repeated descriptions of actually identical structures are omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate the understanding of those skilled in the art. In addition, the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present invention and are not intended to limit the subject matter recited in the claims.

[0040] Please refer to Figures 1-3 As shown, in an embodiment of the present invention, a vacuum chamber with a double-pushing and material-distributing device includes a mud feeding mechanism 1 and a vacuum pug mill chamber 2 that are interconnected through a material-distributing sieve plate 3. Two pugging pushing lines 4 are arranged in the vacuum pug mill chamber 2, and the two pugging pushing lines 4 respectively receive the mud materials divided by the material-distributing sieve plate 3.

[0041] The mud feeding mechanism 1 rotates synchronously through a double-screw auger or a double-screw rod, and forcibly pushes the raw materials from the feeding port into the mixing chamber in front of the material-distributing sieve plate 3. The material-distributing sieve plate 3 uses an equalizing structure to shunt and partition to guide the mud materials to flow out evenly and respectively fall onto the corresponding pugging pushing lines 4. The two pugging pushing lines 4 are integrated in the same vacuum pug mill chamber 2, and the vacuum pug mill chamber 2 performs degassing treatment on the mud materials through a vacuum pumping device. Each pugging pushing line 4 is driven by independent kinetic energy and is equipped with a screw auger to cut, break, reorganize and homogenize the mud materials on the line. The mud materials processed by the pugging pushing lines 4 are finally shaped and discharged through their respective shaping outlet modules at the extrusion end.

[0042] That is, the equipment divides the mud from the mud feeding mechanism 1 into two strands through the material dividing screen plate 3, and feeds them into two mud pushing lines 4 in the vacuum mud kneading chamber 2 respectively, and each completes homogenization, vacuum degassing and extrusion. The smaller increase in floor space is exchanged for a greater increase in production capacity, and the independent processing path ensures that the performance of the double-line mud is on par with that of the single-line equipment.

[0043] The mud kneading advancing line 4 includes a feeding screw 41 and a feeding barrel 42. The mud material falls from the material dividing screen plate 3 into the feeding barrel 42, and the feeding screw 41 pushes the mud material to move forward along the feeding barrel 42. The arc surface structure of the feeding barrel 42 provides an escape space for the screw, while optimizing the mud material flow path. Each feeding screw 41 is driven by an independent motor mechanism, avoiding the problem of overload caused by the increase in specifications of the traditional single machine.

[0044] The feed tubes 42 of the two mud kneading advancing lines 4 have at least one section of abutting parallel portion near one end of the material dividing screen plate 3, so that the mud after diversion can enter the respective feed tubes 42 more evenly. The abutting parallel portion reduces the biased flow of mud and ensures uniform feeding of the two lines. It should be noted here that the parallel portion does not mean that the two feed tubes 42 have a fusion portion. In the parallel section, there is still a vertically protruding blocking structure between the two feed tubes 42 to prevent the mud between the two lines from flowing into each other.

[0045] In a specific embodiment, a single feeding cylinder 42 is a semicircular plate-shaped structure, and two arc-shaped feeding cylinders 42 are arranged in parallel and have a fitting portion at one end close to the material separation screen plate 3. The fitting portion can be formed by welding or integral molding.

[0046] Furthermore, the two feed barrels 42 and the contact side wall of the feed barrel 42 and the vacuum mud kneading chamber 2 are integrally formed, that is, the feed barrel 42 and the vacuum mud kneading chamber 2 are integrally cast. The integrally formed structure can reduce the connection gap, enhance the structural strength, avoid leakage or uneven pressure due to damage to the weak part of the structure, improve the vacuum sealing, and ensure stable degassing.

[0047] In a specific embodiment, the integrated structure formed by the two feeding barrels 42 serves as the bottom wall of the vacuum mud-making chamber 2. The ribs extend from the bottom end of the side wall of the vacuum mud-making chamber 2 and are connected to the feeding barrel 42 to ensure that the feeding barrel 42 has sufficient bearing strength. This design avoids the need for an additional bottom plate structure in the vacuum mud-making chamber 2, reduces steel plate feeding, and simplifies the equipment structure. The entire inner cavity has no additional seams except for the removable top cover, ensuring the airtightness of the vacuum chamber.

[0048] On the operating level of the feeding screw 41, the rotational linear velocity directions of the two feeding screws 41 at the bottom surface of the corresponding feeding cylinder 42 are opposite. This feeding method makes the mud material advance along the inner wall direction of the feeding cylinder 42 close to the vacuum pug mill chamber 2, rather than shifting towards the adjacent advancing line, avoiding the mutual mixing of the mud materials in the processes of shearing, crushing, and recombination, improving the processing independence, and enhancing the final forming consistency.

[0049] On both side walls of the vacuum pug mill chamber 2, there are respectively arranged combing plates 21 which are arranged opposite to the corresponding feeding cylinders 42. The surface of the combing plate 21 is designed with a densely arranged comb tooth or grid structure. When the mud material pushed by the feeding screw 41 passes through the combing plate 21, the comb teeth or grids will cut the mud material into thin strip or small block shapes, forcibly destroying the original layered structure or aggregates inside the mud material, thereby releasing the air bubbles wrapped in the mud material and creating a larger surface area for vacuum degassing.

[0050] It should be noted here that the feeding screw 41 is not arranged around the rotating rod in a continuous thread shape, but is arranged by a plurality of spiral blades along the length direction of the rotating rod. The combing plate 21 is arranged on the side wall of the vacuum pug mill chamber 2 avoiding the spiral blades, and there will be no interference problem between the combing plate 21 and the feeding screw 41.

[0051] The vacuum chamber also includes two discharging cylinders 5, and the two independent discharging cylinders 5 correspond to the two feeding cylinders 42 respectively. After the mud material is pushed by the feeding cylinder 42, it is discharged through the discharging cylinder 5 respectively. A replaceable plastic mold can be installed on the discharging cylinder 5 to discharge the mud material in a certain shape.

[0052] In one embodiment, a steering flange can be arranged at the connecting part of the discharging cylinder 5 and the feeding cylinder 42. The axis direction of the steering flange changes from being coincident with the axis of the feeding cylinder 42 to being offset from the axis of the feeding cylinder 42, realizing a certain deflection of the discharging cylinder 5, and the discharging angle can be independently adjusted to improve the production flexibility.

[0053] Please refer to Figures 2-4 As shown, the material distribution sieve plate 3 includes a partition plate 31 and a plurality of through holes 32 distributed on both sides of the partition plate 31 and penetrating through the material distribution sieve plate 3. The partition plate 31 plays a barrier role in the material channel, ensuring that the mud material can be clearly divided into the corresponding feeding cylinders 42 after being output from the mud feeding mechanism 1 without mutual mixing. The partition plate 31 is arranged vertically on the material distribution sieve plate 3 and can serve as the main framework of the material distribution sieve plate 3 to bear the transportation pressure of the mud material.

[0054] The shape, size, and distribution of the through holes 32 determine the flow rate of the mud material passing through the material distribution sieve plate 3, thereby affecting the filling rate of the feeding cylinder 42. By reasonably designing the through holes 32, it can be ensured that the two feeding cylinders 42 obtain the mud material synchronously, avoiding the problem of too fast or too slow feeding on one side. Ensure the stable feeding of each feeding line and avoid the uneven mud material density caused by flow rate fluctuations.

[0055] The clay passing through the through-holes 32 will be sheared on the surface of the material distributing sieve plate 3, causing larger lumps to be broken, which helps the subsequent vacuum degassing process, makes the clay more dense, and improves the forming quality.

[0056] The main part of the through-holes 32 is rectangular rounded holes. The rectangular structure provides a larger opening area, enabling the clay to pass through more smoothly and reducing the risk of blockage. The rounded part can reduce the stress concentration at the edges of the through-holes 32, improve the overall fatigue resistance of the sieve plate, and reduce cracking or damage caused by long-term operation. The arc design also helps the clay to pass through smoothly, reduces material residue, and improves the continuity of equipment operation.

[0057] In a specific embodiment, the two rounded corners at the same end of the through-holes 32 extend and merge to form semi-circular hole-like structures at both ends of the rectangle.

[0058] Furthermore, the distribution rate of the rectangular rounded holes in the through-holes 32 is at least 95%. The remaining through-holes 32 can be supplemented with circular holes or oval holes to fill the redundant solid areas on the material distributing sieve plate 3 caused by insufficient arrangement of the through-holes 32.

[0059] The distribution rate of the through-holes 32 on the material distributing sieve plate 3 is 20% - 35%. If the distribution rate of the through-holes 32 is too low, it will form a large resistance to the clay, resulting in a large pressure difference when the clay enters the feeding cylinder 42, causing unstable flow rate and insufficient clay passing ability, which affects the feeding efficiency. If the distribution rate of the through-holes 32 is too high, the clay may pass through in large batches instantaneously, leading to an imbalance in the feeding rates of the two advancing lines, making it difficult to ensure the stable feeding of each clay kneading advancing line and affecting the subsequent homogenization effect. In addition, the remaining solid part of the sieve plate is too small, and the overall structure will become fragile, easily deforming or cracking due to long-term stress, reducing the service life.

[0060] A reasonable design of the distribution of rectangular rounded holes, combined with a distribution rate of the through-holes 32 of 20% - 35%, can ensure that the overall force on the material distributing sieve plate 3 is uniform, avoiding equipment vibration or structural deformation caused by excessive local load. A moderate distribution rate of the through-holes 32 can avoid turbulent flow of the clay, improve flow stability, enable the clay to gently fall into the double advancing lines, and enhance the homogenization effect.

[0061] During the extrusion process of the material distribution sieve plate 3, if the clay strip breaks immediately at the orifice, it may cause some clay materials to remain on the hole wall, forming a "wall hanging" phenomenon, which affects subsequent extrusion and equipment cleaning. The width-to-length ratio of the rectangular rounded-corner holes is 4-9:20. The width-to-length ratio determines the cross-sectional shape of the clay strip and affects its mechanical strength after extrusion. Appropriately reducing the width-to-length ratio can increase the moment of inertia, improve the bending resistance, and make the clay strip less likely to buckle due to its own weight or external disturbances. If the width-to-length ratio is too large, the moment of inertia decreases, and the clay strip is likely to bend or even break due to gravity or vibration. Through reasonable width-to-length ratio design, the overall stability of the clay strip can be improved, the buckling deformation caused by its own weight or external disturbances can be reduced, and further the wall hanging situation caused by too fast breakage of the clay strip can be reduced.

[0062] Example 1

[0063] Taking the clay material with a water content of 21% as the treatment object, a screening and material distribution test of the clay material was carried out on the material distribution sieve plate 3 with different through-hole 32 distribution rates.

[0064] Table 1 is a comparison table of various test results caused by clay material screening at different through-hole distribution rates:

[0065]

[0066]

[0067] Example 2

[0068] Taking the clay material with a water content of 21% as the treatment object and the through-hole 32 distribution rate of 30%, a screening and material distribution test of the clay material was carried out on different width-to-length ratios of the rectangular rounded-corner through-holes 32.

[0069] Table 2 is a comparison table of various test results caused by clay material screening at different width-to-length ratios of the rectangular rounded-corner through-holes:

[0070]

[0071]

[0072] Example 3

[0073] Taking the clay material with a water content of 21% as the treatment object, the through-hole 32 distribution rate of the material distribution sieve plate 3 is 30%, the width-to-length ratio of the rectangular rounded-corner through-holes 32 with a 96% distribution rate is 5:20, and the remaining through-holes are circular through-holes. The kneading production volume of the two kneading advancing lines 4 in 1 hour was counted. The discharge volume of the discharge cylinder 5 of the left kneading advancing line 4 was 998 kg, and the discharge volume of the discharge cylinder 5 of the right kneading advancing line 4 was 995 kg.

[0074] By comparing the production data of the left and right discharge cylinders 5, the effect of completely uniform discharge on the left and right is achieved, and the equipment performance is stable and mature.

[0075] It should be noted that the present invention is not limited to the above-described embodiments. The above embodiments are merely examples, and embodiments having the same composition and achieving the same effects as the technical idea within the scope of the technical solution of the present invention are all included in the technical scope of the present invention. In addition, within the scope of not departing from the gist of the present invention, various modifications that can be conceived by those skilled in the art to the embodiments, and other forms constructed by combining some of the constituent elements in the embodiments are also included in the scope of the present invention.

Claims

1. A vacuum chamber with a double-propelling material distribution device, characterized in that: include: A mud feeding mechanism (1) and a vacuum mud kneading chamber (2) are interconnected via a material dividing screen plate (3), wherein two mud kneading advancing lines (4) are arranged in the vacuum mud kneading chamber (2), and the two mud kneading advancing lines (4) respectively receive the mud material divided by the material dividing screen plate (3).

2. A vacuum chamber with a double-propelling material distribution device according to claim 1, characterized in that: The mud kneading advancing line (4) comprises a feeding screw (41) and a feeding barrel (42), and the feeding barrel (42) has a side receiving the mud material and is in a concave arc surface structure in a direction away from the material dividing screen plate (3).

3. A vacuum chamber with a double-propelling material distribution device according to claim 2, characterized in that: The feeding cylinders (42) of the two mud kneading advancing lines (4) have at least one section of abutting parallel portion at one end close to the material dividing screen plate (3).

4. A vacuum chamber with a double-propelling material distribution device according to claim 3, characterized in that: The two feeding cylinders (42) and the contacting side wall of the feeding cylinder (42) and the vacuum clay kneading chamber (2) are integrally formed.

5. A vacuum chamber with a double-propelling material distribution device according to claim 2, characterized in that: The two feeding screws (41) rotate at opposite linear speeds on the bottom surfaces of the corresponding feeding cylinders (42).

6. A vacuum chamber with a double-propelling material distribution device according to claim 5, characterized in that: The side walls on both sides of the vacuum clay kneading chamber (2) are respectively provided with a combing plate (21) arranged opposite to the corresponding feeding cylinder (42).

7. A vacuum chamber with a double-propelling material distribution device according to claim 1, characterized in that: It also comprises two discharge cylinders (5), and the two discharge cylinders (5) are respectively connected to the corresponding feeding cylinders (42).

8. A vacuum chamber with a double-propelling material distribution device according to claim 1, characterized in that: The material dividing screen plate (3) comprises a partition plate (31) and a plurality of through holes (32) distributed on both sides of the partition plate (31) and penetrating the material dividing screen plate (3).

9. A vacuum chamber with a double-propelling material distribution device according to claim 8, characterized in that: The distribution rate of the through holes (32) on the material dividing screen plate (3) is 20% to 35%.

10. A vacuum chamber with a double-propelling material distribution device according to claim 8, characterized in that: At least 95% of the through holes (32) are rectangular holes with rounded corners, and the width-to-length ratio of the rectangular holes with rounded corners is 4-9:20.

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