A slab pre-press device

Abstract

The utility model discloses a kind of billet pre-pressing devices, pre-pressing device includes upper pre-pressing mechanism, lower pre-pressing mechanism and pre-pressing passage, pre-pressing passage allows billet to pass through and carries out pre-pressing to billet;It further includes pre-pressing roller group, pre-pressing roller group is equipped with breathable belt, breathable belt directly contacts and pre-pressing billet;It further includes cleaning mechanism, cleaning mechanism includes cleaning support, cleaning support is provided with cleaning roller brush, incoming material dust suction pipe and outgoing material dust suction pipe, incoming material dust suction pipe and outgoing material dust suction pipe extend along the axial direction of cleaning roller brush, and the radial outer surface of incoming material dust suction pipe and outgoing material dust suction pipe is provided with a plurality of dust suction holes.The utility model of a kind of billet pre-pressing device is provided with cleaning mechanism, can carry out online cleaning to breathable belt, avoid breathable belt block, so that pre-pressing device can continue to work, satisfy continuous production needs.

Description

Technical Field

[0001] This utility model relates to the technical field of wood board manufacturing, and in particular to a pre-pressing device for wood boards. Background Technology

[0002] A board blank is a semi-finished state of wood, which needs to be further pressed to form a finished product.

[0003] In order to fully compress the slab, a slab pre-compression device is used. The slab pre-compression device can pre-compress the slab, remove a large amount of air from the slab, and make the slab more compact. In turn, during the formal pressing, it can reduce defects caused by untimely air removal.

[0004] Structurally, the rollers arranged vertically clamp and convey the slab, and the rollers are fitted with a breathable belt, which is in direct contact with the slab.

[0005] Because the breathable belt has good air permeability, it can facilitate the venting of the slab during pre-pressing.

[0006] However, before pre-compression, the slab is a loose material, and the raw material of the slab will get stuck in the ventilation belt, causing the ventilation belt to become blocked and affecting continuous production. Utility Model Content

[0007] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a slab pre-pressing device equipped with a cleaning mechanism that can clean the ventilated belt online, preventing clogging and enabling the pre-pressing device to operate continuously to meet the needs of continuous production.

[0008] A slab pre-pressing device according to an embodiment of the present utility model: the pre-pressing device includes an upper pre-pressing mechanism and a lower pre-pressing mechanism, a pre-pressing channel is formed between the upper pre-pressing mechanism and the lower pre-pressing mechanism, the pre-pressing channel allows the slab to pass through and pre-press the slab;

[0009] At least one of the upper pre-pressing mechanism and the lower pre-pressing mechanism includes a pre-pressing roller group for pre-pressing the slab, the pre-pressing roller group being fitted with a breathable belt, the breathable belt being in direct contact with and pre-pressing the slab;

[0010] The pre-compression device also includes a cleaning mechanism, which includes a cleaning bracket. The cleaning bracket is equipped with a cleaning roller brush and a motor that drives the cleaning roller brush to rotate for cleaning, an inlet suction pipe located on the inlet side of the cleaning roller brush, and an outlet suction pipe located on the outlet side of the cleaning roller brush. The inlet suction pipe and the outlet suction pipe extend along the axial direction of the cleaning roller brush, and the radial outer surface of the inlet suction pipe and the outlet suction pipe is provided with a plurality of suction holes.

[0011] According to an embodiment of the present utility model, a slab pre-pressing device is provided: at least one of the incoming dust suction pipe and the outgoing dust suction pipe includes a left half pipe, a right half pipe, and a middle partition separating the left half pipe and the right half pipe. The left half pipe is connected to a left dust suction pipe at the end away from the middle partition, and the right half pipe is connected to a right dust suction pipe at the end away from the middle partition.

[0012] According to an embodiment of the present invention, a slab pre-pressing device is provided: the diameters of the left half-pipe and the right half-pipe decrease along the direction close to the middle partition.

[0013] According to an embodiment of the present invention, a slab pre-pressing device is provided: the left half-tube has a left open slit and a left outward fold for forming the left open slit, the left open slit extends along the axial direction of the left half-tube, and the left open slit is used for inserting external tools to clean the bottom of the left half-tube.

[0014] According to an embodiment of the present utility model, a slab pre-pressing device is provided in which the incoming material suction pipe is located diagonally below the cleaning roller brush, and the outgoing material suction pipe is located diagonally above the cleaning roller brush.

[0015] The cleaning bracket includes a left frame and a right frame. The left frame is provided with a left through hole, and the right frame is provided with a right through hole. The left through hole and the right through hole accommodate and support the two ends of the incoming material suction pipe.

[0016] According to an embodiment of the present utility model, a slab pre-pressing device is provided: the left frame is provided with a left notch, the right frame is provided with a right notch, the left notch and the right notch are open upwards, and the left notch and the right notch accommodate and support the two ends of the discharge dust suction pipe.

[0017] According to an embodiment of the present utility model, a slab pre-pressing device is provided: the left end of the discharge dust suction pipe is connected to a left dust extraction pipe, and the left notch is provided with a left clamp to fix the left end of the discharge dust suction pipe and the left dust extraction pipe.

[0018] The right end of the discharge suction pipe is connected to a right dust extraction pipe, and the right notch is provided with a right clamp to fix the right end of the discharge suction pipe and the right dust extraction pipe.

[0019] According to an embodiment of the present utility model, a slab pre-pressing device is provided: the cleaning bracket is provided with a limiting roller that supports and drives the movement of the breathable belt, and the limiting roller is connected to a motor.

[0020] According to an embodiment of the present utility model, a slab pre-pressing device is provided: the upper pre-pressing mechanism includes an upper frame, and the upper frame is provided with the pre-pressing roller group, the ventilated belt and the cleaning mechanism.

[0021] According to an embodiment of the present utility model, a slab pre-pressing device is provided on the upper frame body, wherein the upper frame body is provided with a tensioning mechanism for tensioning the breathable belt, and the tensioning mechanism and the cleaning mechanism are located on both sides of the upper frame body along the slab moving direction;

[0022] The tensioning mechanism includes a rotatable tensioning arm and a hydraulic rod that drives the tensioning arm to rotate. A tensioning roller is provided at one end of the tensioning arm away from its own rotation center. The tensioning arm, the hydraulic rod, and the upper frame are arranged in a triangle. A retractable measuring rod that hinges the tensioning roller and the upper frame is provided parallel to one side of the hydraulic rod.

[0023] A slab pre-pressing device according to an embodiment of the present utility model has at least the following beneficial effects:

[0024] This invention, by setting up an upper pre-pressing mechanism and a lower pre-pressing mechanism, can clamp the pre-pressed slab from both the top and bottom, making it easier to remove air and making the slab more compact, thus reducing defects caused by air not being removed in time during formal pressing.

[0025] This invention, by setting up a pre-pressing roller group and a ventilated belt, can pre-press and convey simultaneously, meeting the need for continuous pre-pressing. At the same time, the ventilated belt discharges air, resulting in a low air content in each part of the slab.

[0026] This utility model incorporates a cleaning mechanism, which includes a cleaning roller brush, an inlet suction pipe, and an outlet suction pipe. It can also clean the ventilated belt online, ensuring that the ventilated belt maintains its air permeability and avoids clogging. This allows the ventilated belt to meet the pre-pressing requirements without the need for machine shutdown for cleaning, enabling continuous and efficient pre-pressing of the slab.

[0027] This invention, by setting up an inlet dust suction pipe and an outlet dust suction pipe, can also absorb the dust brushed off, preventing the dust from scattering and helping to maintain the cleanliness and hygiene of the site.

[0028] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a slab pre-pressing device according to an embodiment of the present utility model from a frontal perspective;

[0031] Figure 2 for Figure 1 A schematic diagram of the structure of the ventilation belt tensioning part in the slab preloading device;

[0032] Figure 3 for Figure 1 A schematic diagram of the cleaning mechanism in the slab preloading device.

[0033] Reference numerals: Upper pre-compression mechanism 100; Lower pre-compression mechanism 110; Pre-compression roller group 120; Ventilated belt 130; Cleaning roller brush 140; Cleaning mechanism 141; Incoming material suction pipe 150; Outgoing material suction pipe 160; Left half pipe 170; Right half pipe 180; Left frame 190; Left perforation 200; Right frame 210; Right perforation 220; Left notch 230; Right notch 240; Limiting roller 250; Upper frame 260; Tensioning mechanism 270; Tensioning arm 280; Hydraulic rod 290; Tensioning roller 300; Measuring rod 310. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, this is only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] A slab pre-pressing device according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0039] Reference Figures 1 to 3 The present invention aims to provide an embodiment of a slab pre-pressing device. This embodiment is equipped with a cleaning mechanism 141, which can clean the breathable belt 130 online, avoid the breathable belt 130 from being blocked, and enable the pre-pressing device to work continuously to meet the needs of continuous production.

[0040] In this example, the pre-compression device includes an upper pre-compression mechanism 100 and a lower pre-compression mechanism 110, and a pre-compression channel is formed between the upper pre-compression mechanism 100 and the lower pre-compression mechanism 110. The pre-compression channel allows the slab to pass through and pre-compress the slab.

[0041] In some specific embodiments of this utility model, the upper pre-pressing mechanism 100 can be raised and lowered to pre-press slabs of different thicknesses.

[0042] In some specific embodiments of this utility model, the upper preload mechanism 100 can be raised and lowered by hydraulic power to cope with situations where the upper preload mechanism 100 is heavy.

[0043] In some specific embodiments of this utility model, the hydraulic power that drives the upper preload mechanism 100 to rise and fall can be distributed at multiple points to evenly lift the upper preload mechanism 100.

[0044] In this embodiment, the upper pre-pressing mechanism 100 and the lower pre-pressing mechanism 110 include a pre-pressing roller group 120, which can drive the slab to move by rotating the rollers.

[0045] In some specific embodiments of this utility model, since the slab is located inside the box and moves with the box, the pre-pressing roller group 120 of the lower pre-pressing mechanism 110 may only include conveying rollers, but a conveyor belt may also be provided to make the slab move smoothly.

[0046] In this embodiment, the pre-pressing roller group 120 of the upper pre-pressing mechanism 100 is equipped with a breathable belt 130. The breathable belt 130 directly contacts the pre-pressing slab, so the breathable belt 130 will squeeze the slab. At the same time, the air in the slab will be released outward through the breathable belt 130, making the slab dense.

[0047] In the direction of slab movement, that is, from Figure 1 right side to Figure 1 On the left, the pre-compression channel includes a pre-compression section, a pressure section, and a compaction section, which gradually compresses the slab.

[0048] Reference Figure 1 and Figure 2 The upper pre-compression mechanism 100 includes an upper frame 260, which is equipped with a pre-compression roller group 120, a breathable belt 130, and a cleaning mechanism 141.

[0049] In some specific embodiments of this utility model, the upper frame 260 may be provided with a tensioning mechanism 270 for tensioning the breathable belt 130. The tensioning mechanism 270 and the cleaning mechanism 141 are located on both sides of the upper frame 260 along the slab moving direction.

[0050] It is easy to understand that by separating the tensioning mechanism 270 and the cleaning mechanism 141 in this embodiment, space can be utilized together, reducing the difficulty of layout and facilitating assembly, production and maintenance.

[0051] In some specific embodiments of this utility model, the tensioning mechanism 270 may include a rotatable tensioning arm 280 and a hydraulic rod 290 that drives the tensioning arm 280 to rotate. A tensioning roller 300 is provided at one end of the tensioning arm 280 away from its own rotation center. The tensioning arm 280, the hydraulic rod 290 and the upper frame 260 are arranged in a triangular pattern. A retractable measuring rod 310 that hinges the tensioning roller 300 and the upper frame 260 is provided parallel to one side of the hydraulic rod 290.

[0052] In use, the hydraulic rod 290 pushes the tension arm 280, causing the tension arm 280 to rotate, which in turn causes the tension roller 300 to rotate synchronously. This can stretch the ventilated belt 130, keeping it in a tensioned state. When the hydraulic rod 290 reverses and retracts, it can cause the tension arm 280 to rotate in the opposite direction, causing the tension roller 300 to retract towards the inside of the upper frame 260, allowing the ventilated belt 130 to relax appropriately.

[0053] The measuring rod 310 is hinged to the tension arm 280 and the upper frame 260 at both ends. Furthermore, the measuring rod 310 is parallel to the hydraulic rod 290, allowing the measuring rod 310 to extend and retract proportionally in sync with the hydraulic rod 290. This facilitates the detection of the tension of the breathable belt 130 and prevents the breathable belt 130 from becoming too tight and breaking.

[0054] The specific principle and structure of the measuring rod 310 can be understood by referring to existing linear measuring tools, which are existing technologies and will not be described in detail here.

[0055] In some specific embodiments of this utility model, the tensioning arm 280 can be directed towards... Figure 1 The left side is tilted, so that the thrust of the hydraulic rod 290 is used to complete the tensioning of the ventilated belt 130, which meets the requirements of hydraulic transmission.

[0056] To address the clogging issue of the breathable belt 130, the pre-compression device also includes a cleaning mechanism 141. The cleaning mechanism 141 includes a cleaning support, which is equipped with a cleaning roller brush 140, a motor for rotating the cleaning roller brush 140, an inlet suction pipe 150 located on the inlet side of the cleaning roller brush 140, and an outlet suction pipe 160 located on the outlet side of the cleaning roller brush 140. The inlet suction pipe 150 and the outlet suction pipe 160 extend along the axial direction of the cleaning roller brush 140, and the radial outer surfaces of the inlet suction pipe 150 and the outlet suction pipe 160 are provided with a plurality of suction holes.

[0057] In summary, by setting up an upper pre-pressing mechanism 100 and a lower pre-pressing mechanism 110, this utility model can clamp the pre-pressed slab from both the top and bottom, making it easier to remove air, resulting in a denser slab and reducing defects caused by air not being removed in time during formal pressing.

[0058] This utility model, by setting up a pre-pressing roller group 120 and a breathable belt 130, can pre-press and convey at the same time, meeting the need for continuous pre-pressing. At the same time, the breathable belt 130 discharges air, so that the air content in each part of the slab is small.

[0059] This utility model, by setting up a cleaning mechanism 141, includes a cleaning roller brush 140, an incoming material suction pipe 150, and an outgoing material suction pipe 160. It can also clean the breathable belt 130 online, so that the breathable belt 130 maintains its air permeability and avoids blockage. This allows the breathable belt 130 to meet the pre-pressing requirements without stopping the machine for cleaning, enabling continuous and efficient pre-pressing of the slab.

[0060] This utility model, by setting up an inlet dust suction pipe 150 and an outlet dust suction pipe 160, can also absorb the dust brushed off, prevent the dust from scattering, and help maintain the cleanliness and hygiene of the site.

[0061] In some specific embodiments of this utility model, at least one of the incoming suction pipe 150 and the outgoing suction pipe 160 may include a left half pipe 170, a right half pipe 180, and a partition separating the left half pipe 170 and the right half pipe 180. The left half pipe 170 is connected to a left suction pipe at the end away from the partition, and the right half pipe 180 is connected to a right suction pipe at the end away from the partition.

[0062] It is easy to understand that by setting the left half pipe 170, the right half pipe 180 and the middle partition, the vacuum pipe can be divided into left and right halves, thereby shortening the vacuuming route, increasing the vacuuming power, reducing the vacuuming resistance, facilitating the rapid discharge of dust, and avoiding pollution of the on-site environment.

[0063] In some specific embodiments of this utility model, the diameters of the left half-pipe 170 and the right half-pipe 180 can be reduced along the direction closer to the middle partition.

[0064] It is easy to understand that this embodiment can increase the clearance space in the middle of the suction pipe, leaving space for the cleaning roller brush 140 to brush dust, and preventing dust from adhering to the breathable belt 130 and causing incomplete cleaning.

[0065] At the same time, it also tilts the bottom wall of the suction pipe, making it easier for dust to slide out of the suction pipe.

[0066] In some specific embodiments of this utility model, the left half tube 170 may have a left open slit and a left outer fold for forming the left open slit. The left open slit extends along the axial direction of the left half tube 170 and is used for inserting external tools to clean the bottom of the left half tube 170.

[0067] It is easy to understand that by opening a left open slot on the left half tube 170, this embodiment also facilitates the cleaning of the inside of the left half tube 170 with tools, saving the need for overall disassembly.

[0068] Furthermore, the left outward fold can also appropriately enclose the suction area of ​​the vacuum tube, reducing dust dispersion.

[0069] In some specific embodiments of this utility model, the incoming material suction pipe 150 can be located diagonally below the cleaning roller brush 140, and the outgoing material suction pipe 160 can be located diagonally above the cleaning roller brush 140.

[0070] It is easy to understand that this embodiment reduces the horizontal space occupied by reasonably arranging the position of the dust suction pipe, and also facilitates the continuous arrangement of the production line, reducing the difficulty of arrangement.

[0071] In some specific embodiments of this utility model, the cleaning bracket may include a left frame 190 and a right frame 210. The left frame 190 is provided with a left through hole 200, and the right frame 210 is provided with a right through hole 220. The left through hole 200 and the right through hole 220 accommodate and support the two ends of the incoming material suction pipe 150.

[0072] It is easy to understand that by setting the left perforation 200 and the right perforation 220, this embodiment satisfies the requirements for the arrangement of the suction pipe, while avoiding damage to the integrity of the left frame 190 and the right frame 210, and avoiding affecting the installation strength and rigidity, so that the cleaning roller brush 140 can effectively clean the breathable belt 130.

[0073] In some specific embodiments of this utility model, the left frame 190 may be provided with a left notch 230, and the right frame 210 may be provided with a right notch 240. The left notch 230 and the right notch 240 are open upwards, and the left notch 230 and the right notch 240 accommodate and support the two ends of the discharge dust suction pipe 160.

[0074] It is easy to understand that by setting the left notch 230 and the right notch 240, this embodiment also makes reasonable use of the external space of the cleaning bracket, reduces processing, lowers manufacturing costs, and makes installation easy.

[0075] In some specific embodiments of this utility model, the left end of the discharge suction pipe 160 can be connected to a left dust extraction pipe, and the left notch 230 is provided with a left clamp to fix the left end of the discharge suction pipe 160 and the left dust extraction pipe.

[0076] Meanwhile, the right end of the discharge suction pipe 160 is connected to a right dust extraction pipe, and the right notch 240 is provided with a right clamp to fix the right end of the discharge suction pipe 160 and the right dust extraction pipe.

[0077] It is easy to understand that this embodiment can simultaneously meet the installation and fixing needs of the suction pipe and the extraction pipe by setting the clamp, while using fewer parts and reducing manufacturing costs.

[0078] Furthermore, it can fix the vacuum hose, reducing the need for vacuum hoses and lowering noise.

[0079] In some specific embodiments of this utility model, the cleaning bracket may be equipped with a limiting roller 250 that supports and drives the movement of the breathable belt 130, and the limiting roller 250 is connected to a motor.

[0080] It is easy to understand that, by setting the limiting roller 250 and the motor, this embodiment also enables the breathable belt 130 to pass powerfully through the cleaning roller brush 140, preventing the breathable belt 130 from stopping and avoiding the breathable belt 130 from being overstretched and damaged.

[0081] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] The terms "first," "second," "third," "fourth," etc. (if applicable) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0083] It should also be noted that, in the description of this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0084] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may also include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or apparatus.

[0085] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0086] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A slab pre-pressing device, characterized in that, The pre-compression device includes an upper pre-compression mechanism (100) and a lower pre-compression mechanism (110), and a pre-compression channel is formed between the upper pre-compression mechanism (100) and the lower pre-compression mechanism (110), the pre-compression channel allowing the slab to pass through and pre-compress the slab; At least one of the upper pre-pressing mechanism (100) and the lower pre-pressing mechanism (110) includes a pre-pressing roller group (120) for pre-pressing the slab, the pre-pressing roller group (120) being fitted with a breathable belt (130), the breathable belt (130) directly contacting and pre-pressing the slab; The pre-compression device also includes a cleaning mechanism (141), which includes a cleaning bracket. The cleaning bracket is equipped with a cleaning roller brush (140) and a motor that drives the cleaning roller brush (140) to rotate for cleaning, an inlet suction pipe (150) located on the inlet side of the cleaning roller brush (140), and an outlet suction pipe (160) located on the outlet side of the cleaning roller brush (140). The inlet suction pipe (150) and the outlet suction pipe (160) extend along the axial direction of the cleaning roller brush (140), and the radial outer surface of the inlet suction pipe (150) and the outlet suction pipe (160) is provided with a plurality of suction holes.

2. The slab pre-pressing device according to claim 1, characterized in that: At least one of the incoming suction pipe (150) and the outgoing suction pipe (160) includes a left half pipe (170), a right half pipe (180), and a partition separating the left half pipe (170) and the right half pipe (180). The left half pipe (170) is connected to a left suction pipe at the end away from the partition, and the right half pipe (180) is connected to a right suction pipe at the end away from the partition.

3. The slab pre-pressing device according to claim 2, characterized in that: The diameters of the left half-pipe (170) and the right half-pipe (180) decrease in the direction close to the central partition.

4. A slab pre-pressing device according to claim 2, characterized in that: The left half-tube (170) has a left open slit and a left outward fold for forming the left open slit, the left open slit extending along the axial direction of the left half-tube (170), the left open slit being used for inserting external tools to clean the bottom of the left half-tube (170).

5. A slab pre-pressing device according to claim 1, characterized in that: The incoming suction pipe (150) is located diagonally below the cleaning roller brush (140), and the outgoing suction pipe (160) is located diagonally above the cleaning roller brush (140). The cleaning bracket includes a left frame (190) and a right frame (210). The left frame (190) is provided with a left through hole (200), and the right frame (210) is provided with a right through hole (220). The left through hole (200) and the right through hole (220) accommodate and support the two ends of the incoming material suction pipe (150).

6. A slab pre-pressing device according to claim 5, characterized in that: The left frame (190) is provided with a left notch (230), and the right frame (210) is provided with a right notch (240). The left notch (230) and the right notch (240) are open upwards, and the left notch (230) and the right notch (240) accommodate and support the two ends of the discharge dust suction pipe (160).

7. A slab pre-pressing device according to claim 6, characterized in that: The left end of the discharge suction pipe (160) is connected to a left dust extraction pipe, and the left notch (230) is provided with a left clamp to fix the left end of the discharge suction pipe (160) and the left dust extraction pipe. The right end of the discharge suction pipe (160) is connected to a right dust extraction pipe, and the right notch (240) is provided with a right clamp to fix the right end of the discharge suction pipe (160) and the right dust extraction pipe.

8. A slab pre-pressing device according to claim 1, characterized in that: The cleaning bracket is provided with a limiting roller (250) that supports and drives the movement of the breathable belt (130), and the limiting roller (250) is connected to a motor.

9. A slab pre-pressing device according to claim 8, characterized in that: The upper pre-compression mechanism (100) includes an upper frame (260), on which the pre-compression roller group (120), the breathable belt (130), and the cleaning mechanism (141) are arranged.

10. A slab pre-pressing device according to claim 9, characterized in that: The upper frame (260) is provided with a tensioning mechanism (270) for tensioning the breathable belt (130), and the tensioning mechanism (270) and the cleaning mechanism (141) are located on both sides of the upper frame (260) along the slab moving direction; The tensioning mechanism (270) includes a rotatable tensioning arm (280) and a hydraulic rod (290) that drives the tensioning arm (280) to rotate. A tensioning roller (300) is provided at one end of the tensioning arm (280) away from its own rotation center. The tensioning arm (280), the hydraulic rod (290) and the upper frame (260) are arranged in a triangle. A retractable measuring rod (310) that hinges the tensioning roller (300) and the upper frame (260) is provided parallel to one side of the hydraulic rod (290).

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