A refining device for producing containerboard

Abstract

The present application relates to papermaking equipment technical field, specifically to a kind of boxboard production's pulp grinding device, comprising: tank;Inlet and outlet pipe group, the inlet and outlet pipe group is located in the side of tank and can be supplied with pulp discharge;Pulp grinding mechanism, the pulp grinding mechanism is located in tank and can be stirred and pulp grinding treatment to pulp;The pulp grinding mechanism includes: pulp grinding assembly, stirring assembly and power device, the power device is located in the lower end of tank, the pulp grinding assembly and stirring assembly are located in tank from top to bottom and are interconnected, the stirring assembly is connected with power device, by the cooperation of pulp grinding assembly and stirring assembly, can be fully pulp grinding treatment to pulp raw material in boxboard production process, especially the dispersion stirring treatment before pulp grinding, can minimize the fiber of flocculation or agglomeration, improve the efficiency and effect of pulp grinding.

Description

Technical Field

[0001] This invention relates to the field of papermaking equipment technology, and more specifically to a pulping device for producing corrugated cardboard. Background Technology

[0002] In the production process of corrugated board, in order to improve the overall strength of corrugated board, it is necessary to refine the pulp used in papermaking to improve the strength, stability and other characteristics of the board produced in subsequent papermaking processes.

[0003] In order to reduce production costs and implement environmentally friendly production, pulp is usually a combination of new pulp and recycled pulp. Even if these two types of pulp are treated before refining, they are still prone to flocculation and clumping. Currently, general refining equipment is difficult to pre-treat the pulp before refining, which easily leads to flocculated pulp entering the refining section, resulting in poor refining effect. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a pulping device for corrugated board production, which solves the technical problems of poor pulping effect and difficulty in dealing with pulp clumping and flocculation affecting pulping in existing technologies.

[0005] The technical solution adopted in this invention is a pulping device for producing corrugated cardboard, comprising: Tank body; Inlet and outlet pipe assembly, which is located on the side of the tank and can be used for slurry conveying and discharging; A pulping mechanism, which is located inside the tank and can stir and pulp the slurry; The pulping mechanism includes a pulping component, a stirring component, and a power unit. The power unit is located at the lower end of the tank. The pulping component and the stirring component are arranged from top to bottom inside the tank and are connected to each other through transmission. The stirring component is connected to the power unit through transmission.

[0006] This structure, through the cooperation of the grinding and mixing components, allows the slurry to be forcibly agitated by the mixing components after being injected into the lower part of the tank, before grinding. This improves the overall continuity of the grinding process, eliminating the need for secondary transfer and preventing re-agglomeration. It also enhances the integration of the device. Furthermore, by utilizing gravity and the fluid force during slurry input, it can more effectively break up precipitated or flocculated slurry.

[0007] The stirring assembly includes a stirring shaft and a stirring blade assembly. The stirring blade assembly is located on the stirring shaft, and the stirring shaft is rotatably located on the lower side of the tank body and is connected to the power unit for transmission.

[0008] This structure allows the stirring shaft to be driven directly and effectively by a power unit, thereby using the stirring blade assembly to stir and break up the slurry inside the tank.

[0009] The tank is equipped with a filter plate. The stirring shaft rotates concentrically and passes through the filter plate and is connected to the grinding assembly for transmission. The stirring blade assembly is located between the lower inner wall of the tank and the filter plate.

[0010] This structure allows the filter plates to more effectively combine clumps and flocculate slurry, reducing the amount of such slurry entering the grinding assembly. At the same time, it more effectively breaks up this portion of the slurry, improving the efficiency and effectiveness of subsequent processing.

[0011] The grinding assembly includes: a conical mill group and a flat mill group distributed from bottom to top and connected to each other through transmission; the grinding assembly as a whole is concentrically rotatably connected to the tank body; and the conical mill group is connected to the stirring shaft through transmission. The conical grinding assembly includes a lower conical grinding seat and an upper conical grinding seat, and the flat grinding assembly includes a lower flat grinding seat and an upper flat grinding seat. The upper conical grinding seat and the upper flat grinding seat are spaced apart from the inner wall of the tank. The lower conical grinding seat and the lower flat grinding seat are both detachably and sealed to the inner wall of the tank.

[0012] This structure, through the combination of conical grinding and flat grinding groups, allows for the maximum grinding of fibers in the pulp by first performing conical grinding and then flat grinding, thereby improving the overall strength and quality of subsequent boxboard production and enhancing the continuity of the production process.

[0013] The upper end of the tank is provided with a telescopic device. The upper conical grinding seat and the upper flat grinding seat are concentrically connected by a first shaft. The telescopic shaft of the telescopic device slides through the tank and is rotatably sealed to the upper flat grinding seat. The stirring shaft is slidably sealed to the first shaft.

[0014] This structure allows for flexible and convenient adjustment of the grinding gap of the grinding assembly by adjusting the synchronous positions of the upper conical grinding seat and the upper flat grinding seat through the telescopic device.

[0015] A split-action component is provided between the telescopic device and the grinding assembly, which can adjust the conical grinding assembly and the flat grinding assembly separately or synchronously.

[0016] The agitator assembly includes: an outer sleeve, a first valve, an inner tube, and a second valve. The outer sleeve is concentrically connected to the upper flat grinding seat and concentrically driven through the first shaft. The first shaft is slidably and driveably connected to the upper flat grinding seat. The outer sleeve is rotatably and sealed to the telescopic shaft of the telescopic device. A first chamber is opened on the upper side of the inner sleeve, and a second chamber is opened on the upper side of the stirring shaft. The two ends of the first shaft are respectively driven and sealed and can slide into the first chamber and the second chamber. A first groove is opened between the outer sleeve and the telescopic shaft of the telescopic device. The first valve is located on the side of the telescopic shaft of the telescopic device and outside the tank. A second channel is opened at the axis of the first shaft to connect the first chamber and the second chamber. The embedded tube extends into the second channel and is rotatably sealed and slidably connected to the first shaft. The other end of the embedded tube is connected to the side of the telescopic device and is located outside the tank. The second valve is located at the end of the embedded tube that extends out of the tube body.

[0017] This structure allows for targeted adjustment of the grinding gap between the upper flat grinding seat and the upper conical grinding seat at different positions, making it more adaptable to processing needs in different environments, and the adjustment is convenient, quick, and stable.

[0018] The stirring shaft is provided with an anti-clogging scraper on its side. There are at least two anti-clogging scrapers, which are respectively located on both sides of the filter plate. The anti-clogging scrapers are in contact with the surface of the filter plate.

[0019] This structure effectively prevents the filter plates from being clogged by clumps or flocculated slurry.

[0020] The inlet and outlet pipe assembly includes an inlet pipe, an outlet pipe, and a return pipe. The inlet pipe is located on the lower side of the tank and below the filter plate. The outlet pipe is located on the upper side of the tank and above the upper flat grinding seat. There are at least two return pipes, both of which are connected to the outlet pipe. The other ends of the two return pipes are connected to the tank and are located between the filter plate and the lower conical grinding seat and between the filter plate and the lower inner wall of the tank, respectively.

[0021] This structure allows for selective conveying and discharge of the slurry, as well as recirculation and secondary refining, based on the slurry's condition, thus improving flexibility.

[0022] As can be seen from the above technical solution, the beneficial technical effects of the present invention are as follows: 1. Through the cooperation of the pulping and mixing components, the pulp raw materials can be fully pulped during the production of corrugated board. In particular, the dispersion and mixing treatment before pulping can minimize the clumping or flocculation of fibers and improve the efficiency and effect of pulping.

[0023] 2. The combination of conical and flat grinding sets can more effectively grind the fibers in the pulp, thereby improving the strength and quality of the subsequent paperboard manufacturing.

[0024] 3. The installation of the telescopic device and the split-action component allows for further adjustment of the grinding pulp gap according to the condition of the conical mill and the flat mill, improving the convenience of equipment maintenance and ensuring the quality of production. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0026] Figure 1 This is a schematic diagram of the overall structure of a pulping device for producing corrugated cardboard according to the present invention; Figure 2 This is a schematic diagram of the internal structure of a pulping device for producing corrugated cardboard according to the present invention; Figure 3 This is a cross-sectional view of the overall structure of a pulping apparatus for producing corrugated cardboard according to the present invention. Figure 4 This is a schematic diagram of the overall structure of the pulping mechanism and the split-action component of a pulping device for producing cardboard boxes according to the present invention.

[0027] Figure label: Tank 1; Inlet / outlet pipe assembly 2, inlet pipe 21, outlet pipe 22, return pipe 23; The grinding mechanism 3, grinding assembly 31, conical mill assembly 311, lower conical mill seat 3111, upper conical mill seat 3112, flat mill assembly 312, lower flat mill seat 3121, upper flat mill seat 3122, stirring assembly 32, stirring shaft 321, stirring blade assembly 322, filter plate 323, anti-clogging scraper 324, power unit 33, first shaft 34; Telescopic device 4; Transfer assembly 5, outer sleeve 51, first valve 52, inner tube 53, second valve 54, first chamber 55, second chamber 56, first channel 57, second channel 58. Detailed Implementation

[0028] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0029] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0030] Example 1: like Figure 1-4 As shown, this embodiment provides a pulping apparatus for producing corrugated cardboard, comprising: Tank 1; Inlet / outlet pipe assembly 2 is located on the side of tank body 1 and can be used for slurry conveying and discharging; The grinding mechanism 3 is located inside the tank 1 and can stir and grind the slurry. The pulping mechanism 3 includes a pulping component 31, a stirring component 32, and a power unit 33. The power unit 33 is located at the lower end of the tank body 1. The pulping component 31 and the stirring component 32 are arranged from top to bottom inside the tank body 1 and are connected to each other through transmission. The stirring component 32 is connected to the power unit 33 through transmission.

[0031] The inlet and outlet pipe group 2 is equipped with devices such as valves and liquid pumps to control the opening and closing of the pipeline and the delivery, so as to meet the normal liquid flow and delivery of the pipeline.

[0032] The working principle of Example 1 is explained in detail below: When processing the pulp raw material for corrugated cardboard, the pulp raw material is fed into the tank 1 through the inlet and outlet pipe assembly 2. The inlet point of the tank 1 is located on the lower side, that is, the pulp is transported from bottom to top in the tank 1. After being processed by the mixing assembly 32 and the pulping assembly 31, it is output from the upper side of the tank 1.

[0033] The mixing component 32 can pre-mix the input slurry, breaking down the flocculated fibers in the slurry, which is more conducive to the subsequent processing by the refining component 31. In conjunction with the refining component 31, the slurry can be fully refined, which is beneficial for the subsequent processing and use in the paperboard making stage.

[0034] The stirring assembly 32 includes a stirring shaft 321 and a stirring blade assembly 322. The stirring blade assembly 322 is disposed on the stirring shaft 321. The stirring shaft 321 is rotatably disposed on the lower side inside the tank body 1 and is connected to the power unit 33 for transmission.

[0035] In this embodiment, the power unit 33 is an electric motor. The rotating shaft of the motor drives the stirring shaft 321 to rotate. The stirring shaft 321 stirs and breaks up the slurry in the tank 1 through the stirring blade assembly 322, thereby achieving the effect of dispersing and uniformly limiting the slurry, and improving the grinding effect of the subsequent grinding mechanism 3 on the slurry. In other embodiments, the power unit 33 can also be driven by a steam turbine.

[0036] The tank body 1 is equipped with a filter plate 323. The stirring shaft 321 rotates concentrically and passes through the filter plate 323 and is connected to the grinding assembly 31 for transmission. The stirring blade assembly 322 is located between the lower inner wall of the tank body 1 and the filter plate 323.

[0037] The filter plate 323 can separate the slurry in the input tank 1 until the stirring component 32 fully breaks down the clumps and flocculated fibers in the slurry, and only then can it pass through the filter plate 323 before entering the grinding mechanism 3. At the same time, it can also block some impurities that may enter, which can improve the efficiency of subsequent grinding and protect the grinding component 31. In addition, due to the effect of gravity and the fluid impact when the slurry is input, the situation of fiber in the slurry clogging the filter plate 323 can be minimized.

[0038] The grinding assembly 31 includes: a conical mill group 311 and a flat mill group 312 distributed from bottom to top and connected to each other in a driving manner. The grinding assembly 31 is concentrically rotatably connected to the tank body 1, and the conical mill group 311 is drivingly connected to the stirring shaft 321. The conical grinding assembly 311 includes a lower conical grinding seat 3111 and an upper conical grinding seat 3112, and the flat grinding assembly 312 includes a lower flat grinding seat 3121 and an upper flat grinding seat 3122. The upper conical grinding seat 3112 and the upper flat grinding seat 3122 are both spaced from the inner wall of the tank body 1, and the lower conical grinding seat 3111 and the lower flat grinding seat 3121 are both detachably and sealed to the inner wall of the tank body 1.

[0039] By combining conical and flat milling processes, the pulp is first conically milled to fluff the fibers, retain long fibers, and improve fiber strength. Then, it is flat milled to improve beating degree, compactness, dewatering, and uniformity. At the same time, the pulp delivery path is input from the middle of the conical mill group 311 and the flat mill group 312 and output from the edge. This can achieve effective pulping and avoid pulp backflow that would prevent pulping or require a separate, high-cost countercurrent mill structure.

[0040] The stirring shaft 321 is provided with an anti-clogging scraper 324 on its side. There are at least two anti-clogging scrapers 324, which are respectively provided on both sides of the filter plate 323. The anti-clogging scrapers 324 are in contact with the surface of the filter plate 323.

[0041] In conjunction with the stirring and rotation of the stirring shaft 321, the anti-clogging scraper 324 can simultaneously rotate with the stirring shaft 321 to scrape off any scum, fibers, etc. that may exist on the surface of the filter plate 323, and return them to the solution in the tank 1. With the continuous input of slurry and the output after grinding, the possibility of clogging of the filter plate 323 can be effectively reduced, and such slurry substances that are prone to clogging the filter plate 323 can be broken up a second time by the stirring blade assembly 322. In other embodiments, a brush can also be used to clean the filter plate 323, or a clean water source can be connected to flush the filter plate 323 with water.

[0042] The inlet and outlet pipe assembly 2 includes an inlet pipe 21, an outlet pipe 22, and a return pipe 23. The inlet pipe 21 is located on the lower side of the tank body 1 and below the filter plate 323. The outlet pipe 22 is located on the upper side of the tank body 1 and above the upper flat grinding seat 3122. There are at least two return pipes 23, both of which are connected to the outlet pipe 22. The other ends of the two return pipes 23 are connected to the tank body 1 and are located between the filter plate 323 and the lower conical grinding seat 3111 and between the filter plate 323 and the lower inner wall of the tank body 1, respectively.

[0043] The input pipe 21 is used to input the slurry, and the output pipe 22 is used to output the slurry after grinding. The two return pipes 23 on the output pipe 22 can dynamically adjust the slurry feeding and discharging state according to the grinding effect. If secondary grinding is required but filtration is not required, the slurry is directly sent back to the tank 1 between the filter plate 323 and the lower conical grinding seat 3111. Conversely, if filtration is required, the slurry is sent back to the lower inner wall of the tank 1 between the filter plate 323 and the filter plate 323. The output pipe 22 and the two return pipes 23 are only open at a time, that is, multiple pipes cannot be opened at the same time to prevent slurry cross-flow from affecting subsequent production. In fact, liquid pumps can also be set separately in the output pipe 22 and the return pipes 23 to assist the slurry transportation flow and also to serve as pipeline isolation. In some other embodiments, a secondary input method can also be adopted, that is, the ground slurry is input again through the input pipe 21 for grinding.

[0044] Example 2: like Figure 1-4 As shown, the only structural difference between this embodiment and Embodiment 1 is that the upper end of the tank 1 is provided with a telescopic device 4, the upper conical grinding seat 3112 and the upper flat grinding seat 3122 are concentrically connected by a first shaft 34, the telescopic shaft of the telescopic device 4 slides through the tank 1 and is rotatably sealed to the upper flat grinding seat 3122, and the stirring shaft 321 is slidably sealed to the first shaft 34.

[0045] Apart from the above, the rest of the structure is exactly the same as in Example 1.

[0046] The working principle of Example 2 is explained in detail below: During the continuous grinding process, due to wear, the gaps between the lower conical grinding seat 3111 and the upper conical grinding seat 3112, as well as between the lower flat grinding seat 3121 and the upper flat grinding seat 3122, will gradually widen, affecting the grinding effect. Therefore, according to the sampling inspection of the slurry after grinding, it is necessary to periodically correct and compensate for the gaps. The telescopic device 4 uses a hydraulic cylinder, and in some other embodiments, it can also be a pneumatic cylinder or an electrically controlled telescopic rod. The telescopic device 4 moves by moving its telescopic shaft, which simultaneously drives the upper conical grinding seat 3112 and the upper flat grinding seat 3122 to move, which can make synchronous debugging more convenient and faster, and improve the convenience of inspection and maintenance.

[0047] Example 3: like Figure 2-4 As shown, the only structural difference between this embodiment and embodiment two is that a split-movement component 5 is provided between the telescopic device 4 and the grinding assembly 31. The split-movement component 5 can adjust the conical grinding assembly 311 and the flat grinding assembly 312 separately or synchronously.

[0048] The split-action assembly 5 includes: an outer sleeve 51, a first valve 52, an inner tube 53, and a second valve 54. The outer sleeve 51 is concentrically connected to the upper flat grinding seat 3122 and is concentrically driven through the first shaft 34. The first shaft 34 is slidably connected to the upper flat grinding seat 3122 and can be driven. The outer sleeve 51 is rotatably and sealed to the telescopic shaft of the telescopic device 4. A first chamber 55 is opened on the upper side of the inner sleeve 51, and a second chamber 56 is opened on the upper side of the stirring shaft 321. The two ends of the first shaft 34 are respectively driven and sealed and can slide into the first chamber 55 and the second chamber 56. A first groove 57 is opened between the outer sleeve 51 and the telescopic shaft of the telescopic device 4. The first valve 52 is located on the side of the telescopic shaft of the telescopic device 4 and outside the tank body 1. A second channel 58 is opened at the axis of the first shaft 34 to connect the first chamber 55 and the second chamber 56. The inner tube 53 extends into the second channel 58 and is rotatably sealed and slidably connected to the first shaft 34. The other end of the inner tube 53 is connected to the side of the telescopic device 4 and is located outside the tank body 1. The second valve 54 is located at the end of the inner tube 53 that extends out of the tube body.

[0049] Apart from the above, the rest of the structure is the same as in Example 2.

[0050] The working principle of Example 3 is explained in detail below: Furthermore, since the wear rates of the wear parts in the conical mill group 311 and the flat mill group 312 are different, the conical mill group 311 and the flat mill group 312 can be corrected and compensated according to the actual state of the slurry using the transfer assembly 5. If it is necessary to adjust the conical mill group 311 and the flat mill group 312 synchronously during the adjustment, or to keep the position of the conical mill group 311 and the flat mill group 312 fixed, the first valve 52 and the second valve 54 are closed at the same time, and the first chamber 55, the second chamber 56, the first channel 57 and the second channel 58 are completely filled with hydraulic oil. When the valve is closed, the corresponding liquid path is completely closed. At this time, the first shaft 34 cannot move up and down relative to the first chamber 55, nor can it move up and down relative to the second chamber 56 on the stirring shaft 321. That is, the positions of the upper conical grinding seat 3112 and the upper flat grinding seat 3122 are locked at the same time, so that the gap can be adjusted synchronously or the grinding can be synchronously driven by the telescopic device 4.

[0051] When the valve is opened, the corresponding liquid circuit is opened. It is worth noting that the ends of the first valve 52 and the second valve 54 located outside the tank 1 are both connected to an external liquid storage container and a liquid pump, so that the hydraulic oil in the first chamber 55 and the second chamber 56 can be pumped out by opening the liquid pump and the valve. If the position of the upper flat grinding seat 3122 needs to be adjusted separately, the first valve 52 and the second valve 54 are kept open. Then, the position of the outer sleeve 51 is adjusted by the telescopic device 4, that is, the position of the upper flat grinding seat 3122 is adjusted. At this time, by injecting or outputting hydraulic oil into the first chamber 55 and the second chamber 56 respectively, the pressure in the entire transfer assembly 5 can be kept stable. After the adjustment is completed, the hydraulic oil in the second chamber 56 is corrected and compensated to eliminate the possible changes in the position of the upper conical grinding seat 3112 caused by the movement of the components and the changes in positive and negative pressure and thrust generated by the hydraulic oil delivery. It is worth noting that sensors for measuring size or position, such as distance sensors and position sensors, are provided in both the first chamber 55 and the second chamber 56. In this way, the gap size between the flat grinding group 312 and the conical grinding group 311 can be determined directly by measuring the inner height of the first chamber 55 and the second chamber 56, making the adjustment more convenient. Similarly, when the upper grinding seat 3122 needs to be adjusted separately, it can be adjusted simply by inputting or discharging hydraulic oil through the second valve 54. The adjustment method is convenient and quick, and it can maintain a stable state after the adjustment is completed. At the same time, in order to maintain stability, the first valve 52 and the second valve 54 have a certain flow opening pressure, which can avoid displacement caused by the weight of the upper grinding seat 3122, thereby improving stability.

[0052] Specifically, the first shaft 34 has a transmission rib on its side. Together with the outer sleeve and the stirring shaft, it can perform circumferential transmission while satisfying vertical sliding. In other embodiments, the first shaft 34 can also be made into a polygonal structure to achieve the same effect as mentioned above.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A pulping apparatus for producing corrugated cardboard, characterized in that, include: Tank body (1); Inlet and outlet pipe assembly (2), the inlet and outlet pipe assembly (2) is located on the side of the tank body (1) and can be used for slurry conveying and discharging; The grinding mechanism (3) is located inside the tank (1) and can stir and grind the slurry. The grinding mechanism (3) includes: grinding component (31), stirring component (32) and power device (33). The power device (33) is located at the lower end of the tank (1). The grinding component (31) and stirring component (32) are arranged from top to bottom inside the tank (1) and are connected to each other through transmission. The stirring component (32) is connected to the power device (33) through transmission.

2. The pulping apparatus for producing corrugated cardboard according to claim 1, characterized in that, The stirring assembly (32) includes a stirring shaft (321) and a stirring blade assembly (322). The stirring blade assembly (322) is located on the stirring shaft (321). The stirring shaft (321) is rotatably located on the lower side inside the tank (1) and is connected to the power device (33) for transmission.

3. The pulping apparatus for producing corrugated cardboard according to claim 2, characterized in that, The tank (1) is equipped with a filter plate (323). The stirring shaft (321) rotates concentrically and passes through the filter plate (323) and is connected to the grinding assembly (31) for transmission. The stirring blade assembly (322) is located between the lower inner wall of the tank (1) and the filter plate (323).

4. The pulping apparatus for producing corrugated cardboard according to claim 3, characterized in that, The grinding assembly (31) includes a conical mill (311) and a flat mill (312) distributed from bottom to top and connected to each other in a driving manner. The grinding assembly (31) is concentrically rotatably connected to the tank (1). The conical mill (311) is connected to the stirring shaft (321) in a driving manner. The conical grinding assembly (311) includes a lower conical grinding seat (3111) and an upper conical grinding seat (3112), and the flat grinding assembly (312) includes a lower flat grinding seat (3121) and an upper flat grinding seat (3122). The upper conical grinding seat (3112) and the upper flat grinding seat (3122) are spaced apart from the inner wall of the tank body (1). The lower conical grinding seat (3111) and the lower flat grinding seat (3121) are both detachably and sealed to the inner wall of the tank body (1).

5. A pulping apparatus for producing corrugated cardboard according to claim 4, characterized in that, The upper end of the tank (1) is provided with a telescopic device (4). The upper conical grinding seat (3112) and the upper flat grinding seat (3122) are concentrically connected by a first shaft (34). The telescopic shaft of the telescopic device (4) slides through the tank (1) and is rotatably sealed to the upper flat grinding seat (3122). The stirring shaft (321) is slidably sealed to the first shaft (34).

6. A pulping apparatus for producing corrugated cardboard according to claim 5, characterized in that, A split-action component (5) is provided between the telescopic device (4) and the grinding assembly (31), and the split-action component (5) can adjust the conical grinding assembly (311) and the flat grinding assembly (312) separately or synchronously.

7. A pulping apparatus for producing corrugated cardboard according to claim 6, characterized in that, The split-action component (5) includes: an outer sleeve (51), a first valve (52), an inner tube (53), and a second valve (54). The outer sleeve (51) is concentrically connected to the upper flat grinding seat (3122) and concentrically driven through the first shaft (34). The first shaft (34) is slidably connected to the upper flat grinding seat (3122) and can be driven. The outer sleeve (51) is rotatably and sealed to the telescopic shaft of the telescopic device (4). A first chamber (55) is opened on the upper side of the outer sleeve (51), and a second chamber (56) is opened on the upper side of the stirring shaft (321). The two ends of the first shaft (34) are respectively driven and sealed and can slide into the first chamber (55) and the second chamber (56). A first groove (57) is opened between the outer sleeve (51) and the telescopic shaft of the telescopic device (4). The first valve (52) is located on the side of the telescopic shaft of the telescopic device (4) and outside the tank (1). A second channel (58) is opened at the axis of the first shaft (34) to connect the first chamber (55) and the second chamber (56). The embedded tube (53) extends into the second channel (58) and is rotatably sealed and slidably connected to the first shaft (34). The other end of the embedded tube (53) is connected to the side of the telescopic device (4) and is located outside the tank body (1). The second valve (54) is located at one end of the embedded tube (53) that extends out of the tube body.

8. A pulping apparatus for producing corrugated cardboard according to claim 3, characterized in that, The stirring shaft (321) is provided with an anti-clogging scraper (324) on its side. There are at least two anti-clogging scrapers (324) and they are respectively provided on both sides of the filter plate (323). The anti-clogging scraper (324) is in contact with the surface of the filter plate (323).

9. A pulping apparatus for producing corrugated cardboard according to claim 3, characterized in that, The inlet and outlet pipe assembly (2) includes an inlet pipe (21), an outlet pipe (22), and a return pipe (23). The inlet pipe (21) is located on the lower side of the tank body (1) and below the filter plate (323). The outlet pipe (22) is located on the upper side of the tank body (1) and above the upper flat grinding seat (3122). There are at least two return pipes (23), and both are connected to the outlet pipe (22). The other ends of the two return pipes (23) are connected to the tank body (1) and are located between the filter plate (323) and the lower conical grinding seat (3111) and between the filter plate (323) and the lower inner wall of the tank body (1), respectively.

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