A drag slurry board machine for producing ELS boards

Abstract

The application provides a slurry trailing method plate making machine for producing ELS plates, which comprises a slurry trailing method plate making machine, a dehydration device, a pneumatic blank cutter and a blank layer compaction roller arranged on a rack in sequence, a deflection roller for adjusting and deflecting a blanket is arranged below a slurry outlet side of the slurry trailing method plate making machine, and the deflection roller is partially arranged in the slurry trailing method plate making machine; a blank layer press roller is arranged below the blank layer compaction roller, and the blank layer compaction roller is pressed on the blank layer press roller. The application adopts the slurry trailing method to make the ELS slurry adsorbed on the blanket, so as to ensure the thickness and uniformity of the single layer slurry on the blanket, and realizes the production equipment for producing the ELS material plates which is first invented in China.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building material production equipment, and particularly relates to a slurry dragging plate production machine for producing ELS plates. BACKGROUND

[0002] At present, the production methods for producing building plates mainly include a flow slurry method and a taking method, and the existing flow slurry plate production machines and net box taking plate production machines are mainly suitable for materials with long fibers, such as calcium silicate plates. However, for new artificial stone materials (Engineered LimeStone, hereinafter referred to as ELS materials) imitating limestone, the fibers are short, the slurry concentration is small, and the fluidity of the slurry is large. The existing flow slurry method or taking method has the following problems when used for production: (1) under the influence of self-weight, the slurry is poorly uniform when spread on the blanket, which can cause the final plate to be uneven in thickness; (2) due to the large fluidity of the ELS slurry, the single layer of slurry absorbed by the blanket is thin, and more turns are required when forming the plate, which is low in production efficiency; (3) due to the large fluidity of the ELS slurry, the slurry can easily flow out of the effective range of the plate, resulting in a large amount of plate waste, waste of raw materials, and increased difficulty and amount of waste treatment. SUMMARY

[0003] The present application aims to provide a slurry dragging plate production machine for producing ELS plates, which can at least solve some of the defects in the prior art.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] A slurry dragging plate production machine for producing ELS plates, comprising a slurry preparation machine, a dehydration device, a pneumatic blank cutter and a blank layer compaction roller arranged in sequence on a machine frame, a deflection roller is arranged below the slurry outlet side of the slurry preparation machine to adjust and deflect the blanket, and the deflection roller is partially arranged in the slurry preparation machine; a blank layer pressure roller is arranged below the blank layer compaction roller, and the blank layer compaction roller is pressed on the blank layer pressure roller.

[0006] Further, the pulp preparation machine comprises a box body and a stirring mechanism arranged in the box body, one side of the box body is provided with a pulp feeding assembly for feeding pulp into the box body, the other opposite side of the box body is provided with a pulp discharging assembly, the pulp discharging assembly comprises a pulp discharging partition plate, a pulp discharging bottom plate and a smooth roller body, the pulp discharging partition plate is arranged vertically to separate the box body into a pulp stirring area and a pulp discharging area, the smooth roller body is arranged in the pulp discharging area, a deflection roller is arranged below the smooth roller body and partially in the pulp discharging area, the pulp discharging bottom plate is arranged below the pulp discharging partition plate and has a certain spacing with the bottom of the pulp discharging partition plate, the pulp discharging bottom plate extends from the pulp stirring area to the pulp discharging area, a soft rubber is arranged below the pulp discharging bottom plate at the end of the pulp discharging area, and the end of the soft rubber abuts against the felt of the deflection roller.

[0007] Further, the stirring mechanism comprises two sets of wolf tooth stirrers arranged in parallel in the pulp stirring area of the box body, the blades of the two sets of wolf tooth stirrers are detachably connected with the stirring shafts, and the blades of the two sets of wolf tooth stirrers are cross-distributed.

[0008] Further, the inner bottom of the box body in the pulp stirring area is in a W-shaped structure, and the two sets of wolf tooth stirrers are respectively arranged in the two groove portions of the W-shaped structure.

[0009] Further, the pulp feeding assembly comprises a feeding pipe, a pulp tank and an overflow feeding port, the pulp tank is arranged on the side wall of the box body, the bottom of the pulp tank is in a reverse triangular shape, the feeding pipe is connected to the lowest point of the bottom of the pulp tank, and the overflow feeding port is arranged on the upper portion of the side wall of the pulp tank and communicates with the box body.

[0010] Further, the dewatering device comprises a natural dewatering section and a vacuum dewatering section, the natural dewatering section is provided with a plurality of scraping strips arranged in parallel along the running direction of the felt, and the vacuum dewatering section is provided with a plurality of vacuum boxes arranged side by side along the running direction of the felt.

[0011] Further, the vacuum box comprises a water absorption box and a vacuum adsorption panel arranged on the water absorption box, the vacuum adsorption panel is provided with cross-herringbone-shaped openings, long grooves are arranged on the two sides of the vacuum adsorption panel, and angle steels corresponding to the long grooves are arranged on the side wall of the water absorption box.

[0012] Further, the pneumatic blank breaker comprises an electromagnetic valve, a cylinder, a connecting rod, a blade and a roller, the electromagnetic valve and the cylinder are installed on a rack, the electromagnetic valve is interlocked with a detector for detecting the thickness of the blank on the laminating roller, the electromagnetic valve is electrically connected with the cylinder, the connecting rod is connected to the movable end of the cylinder, the blade is installed on the connecting rod and arranged above the blanket in parallel to the width direction of the blanket, the cylinder controls the up-down movement of the blade through the connecting rod, the connecting rod is provided with a proximity switch for controlling and feeding back the position of the connecting rod, and the roller has two and is arranged on both sides of the blade for supporting the blanket.

[0013] Further, the slurry dragging plate making machine for producing ELS plates further comprises a pneumatic blanket deviation adjusting mechanism for monitoring and adjusting the transmission position of the blanket, which is installed on the rack between the pneumatic blank breaker and the blank laminating roller.

[0014] Further, the slurry dragging plate making machine for producing ELS plates further comprises a blanket tensioning mechanism for monitoring and adjusting the tension of the blanket, which is installed on the rack below the dewatering device.

[0015] Compared with the prior art, the slurry dragging plate making machine for producing ELS plates has the following beneficial effects:

[0016] (1) The slurry dragging plate making machine for producing ELS plates provided by the application can solve the problems of short fibers, small slurry concentration and large fluidity of ELS materials, and can realize the production of ELS material plates by adopting the slurry dragging method to ensure the thickness and uniformity of the single-layer slurry on the blanket.

[0017] (2) The slurry dragging plate making machine for producing ELS plates provided by the application can realize the production of ELS material plates by adopting the slurry dragging method to ensure the thickness and uniformity of the single-layer slurry on the blanket.

[0018] The application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the slurry dragging plate making machine of the application;

[0020] Figure 2 is a structural schematic view of the slurry dragging plate making machine of the application;

[0021] Figure 3 is a structural schematic view of the slurry dragging plate making machine of the application;

[0022] Figure 4This is a schematic diagram of the pulp feeding assembly of the drag pulping machine in this invention;

[0023] Figure 5 This is a schematic diagram of the vacuum chamber in this invention;

[0024] Figure 6 This is a schematic diagram of the pneumatic blank cutter in this invention.

[0025] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Drag-type pulping machine; 3. Directional roller; 4. Natural dewatering section; 5. Vacuum dewatering section; 6. Blanket; 7. Pneumatic blank cutter; 8. Pneumatic blanket alignment mechanism; 9. Blanket layer compaction roller; 10. Blanket layer pressure roller; 11. Blanket tensioning mechanism; 12. Box; 13. Slurry feeding assembly; 14. Smooth roller; 15. Slurry mixing area; 16. Mixing mechanism; 17. Slurry discharge baffle; 18. Slurry discharge area; 19. Soft rubber; 20. Slurry discharge bottom plate; 21. Feed pipe; 22. Slurry tank; 23. Overflow feed port; 24. Water suction tank; 25. Vacuum adsorption panel; 26. Opening; 27. Long groove; 28. Angle steel; 29. ​​Cylinder; 30. Solenoid valve; 31. Connecting rod; 32. Blade; 33. Roller. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an abutting connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0029] likeFigure 1 and Figure 2 As shown in the figure, the embodiment provides a slurry dragging plate making machine for producing ELS plate, which comprises a slurry dragging plate making machine 2, a dehydration device, a pneumatic blank cutter 7 and a blank layer compaction roller 9 arranged in sequence on a rack 1. A deflection roller 3 is arranged below the slurry outlet side of the slurry dragging plate making machine 1, and part of the deflection roller 3 is arranged in the slurry dragging plate making machine 1. A blank layer pressing roller 10 is arranged below the blank layer compaction roller 9, and the blank layer compaction roller 9 is pressed on the blank layer pressing roller 10. In the embodiment, the ELS slurry of a certain concentration is mixed in the slurry dragging plate making machine 2, and the mixing is continuously stirred. The blanket 6 passes through the deflection roller 3 and the slurry dragging plate making machine 2. The mixed slurry in the slurry dragging plate making machine 2 is laid on the blanket 6 in the slurry dragging plate making machine 2 at a fixed angle. The blanket 6 is fully contacted with the slurry. Then, the blanket 6 is dragged out of the slurry in the slurry dragging plate making machine 2 by the deflection roller 3 to form an ELS plate blank with uniform thickness. Then, the ELS plate blank is dehydrated with the blanket 6 passing through the dehydration device. After dehydration, the blanket passes through the blank layer compaction roller 9. The ELS plate blank on the blanket 6 is adhered to the blank layer compaction roller 9 by the extrusion between the blank layer pressing roller 10 and the blank layer compaction roller 9. The ELS plate blank on the blanket 6 is pressed to form a soft plate blank with a designed thickness by the rotation of the blank layer compaction roller 9. When the ELS plate blank wound on the blank layer compaction roller 9 reaches the designed thickness, the pneumatic blank cutter 7 cuts the continuous ELS plate blank to form a plate blank with a required length. The blanket 6 is separated from the ELS plate blank, and then transported by the blank layer pressing roller 10 and transported to the slurry dragging plate making machine 2 after being deflected by the deflection roller 3. The above process is repeated in a cycle.

[0030] A specific embodiment is as follows: Figure 2 and Figure 3As shown, the pulp preparation machine 2 of the pulp dragging method comprises a box 12 and a stirring mechanism 16 arranged in the box 12, one side of the box 12 is provided with a pulp feeding assembly 13 for feeding pulp into the box 12, and the opposite side of the box 12 is provided with a pulp discharging assembly, which comprises a pulp discharging partition plate 17, a pulp discharging bottom plate 20 and a smooth roller body 14, the pulp discharging partition plate 17 is arranged vertically to separate the box 12 into a pulp stirring area 15 and a pulp discharging area 18, the smooth roller body 14 is arranged in the pulp discharging area 18, the deflection roller 3 is located below the smooth roller body 14, and part of the deflection roller 3 is located in the pulp discharging area 18, the pulp discharging bottom plate 20 is located below the pulp discharging partition plate 17 and is spaced from the bottom of the pulp discharging partition plate 17 to form a pulp discharging opening, the pulp discharging bottom plate 20 extends from the pulp stirring area 15 to the pulp discharging area 18 at a designed angle, the soft rubber 19 is installed below the end of the pulp discharging bottom plate 20 in the pulp discharging area 18, and the end of the soft rubber 19 abuts against the felt 6 of the deflection roller 3. In operation, the prepared ELS raw pulp enters the pulp stirring area 15 in the box 12 through the pulp feeding assembly 13, and then flows into the pulp discharging area 18 through the pulp discharging opening formed between the pulp discharging partition plate 17 and the pulp discharging bottom plate 20 after being stirred uniformly by the stirring mechanism 16. In this process, the deflection roller 3 adjusts the deflection of the felt 6, part of the felt 6 on the deflection roller 3 enters the pulp discharging area 18, and this part of the felt 6 fully contacts the ELS raw pulp in the pulp discharging area 18. At the same time, due to the design of the soft rubber 19 at the end of the pulp discharging bottom plate 20, the soft rubber 19 can give the felt 6 a certain pressure when the soft rubber 19 contacts the felt 6, and the felt 6 forms a negative pressure after passing through, so that it is easier to adsorb the ELS raw pulp with shorter fibers. The felt 6 adsorbing the ELS raw pulp is dragged out by the movement of the felt 6. In the process of dragging the felt 6 out of the pulp discharging area 18, the smooth roller body 14 of the pulp discharging area 18 rotates in the opposite direction of the movement direction of the felt 6, so that the ELS raw pulp contacts the felt 6 uniformly in thickness. The structure of the pulp preparation machine 2 of the pulp dragging method in this embodiment increases the contact area between the ELS raw pulp and the felt 6, increases the time of the ELS raw pulp remaining on the felt 6, and improves the efficiency of the felt 6 adsorbing the pulp.

[0031] Optionally, as Figure 3As shown, the stirring mechanism 16 includes two sets of wolf tooth stirrers arranged in parallel in the slurry stirring area 15 of the box 12, the blades of the two sets of wolf tooth stirrers are detachably connected with the stirring shafts, and the blades of the two sets of wolf tooth stirrers are cross-distributed; in this embodiment, the stirring shafts and the blades of the wolf tooth stirrers are in a split structure, when installing, only the opening area required for the stirring shafts to pass through needs to be opened on the box 12, and after the stirring shafts are installed, the blades can be assembled from the upper part of the box 12, compared with the existing integrated structure of the stirring shafts and the blades, the opening area required for the installation of the stirring mechanism on the box 12 is greatly reduced, and at the same time, the double-row cross-distributed blades enhance the stirring effect and increase the distance between the two sets of stirrers, thereby reducing the manufacturing difficulty and cost. Optimized, the inner bottom of the box 12 in the slurry stirring area 15 is bent to a shape suitable for the profile of the stirrers according to the shape of the stirrers, in this embodiment, the inner bottom of the box 12 is designed as a W-shaped structure for the two sets of wolf tooth stirrers, and the two sets of wolf tooth stirrers are respectively located in the two groove parts of the W-shaped structure, thereby reducing the slurry sedimentation during stirring. Optimized, the transmission motors of the wolf tooth stirrers are independently placed outside the box 12, connected by a universal coupling in the middle, lengthen the length of the transmission shaft, and reduce the possibility of slurry flowing onto the transmission motor.

[0032] As shown in the figure, Figure 4 In this embodiment, an overflow feeding mode is adopted, specifically, the feeding assembly 13 includes a feeding pipe 21, a slurry tank 22 and an overflow feeding port 23, the slurry tank 22 is installed on the side wall of the box 12, the bottom of the slurry tank 22 is in a reverse triangular shape, the feeding pipe 21 is connected to the lowest point of the bottom of the slurry tank 22, and the overflow feeding port 23 is arranged on the upper part of the side wall of the slurry tank 22 and communicates with the box 12. When working, the prepared ELS raw slurry enters the slurry tank 22 through the feeding pipe 21, and when the ELS raw slurry in the slurry tank 22 reaches the height of the overflow feeding port 23, it enters the box 12 through the overflow mode, and the feeding and discharging of the ELS raw slurry in the slurry tank 22 is in dynamic balance, and the feeding pipe 21 is arranged at the lowest point of the bottom of the slurry tank 22, which uses the impact force of feeding to stir the ELS raw slurry in the slurry tank 22, effectively avoiding the sedimentation of the ELS raw slurry.

[0033] Optionally, as shown in the figure, Figure 1As shown, the dewatering device includes a natural dewatering section 4 and a vacuum dewatering section 5. The natural dewatering section 4 is equipped with multiple scrapers arranged at intervals along the running direction of the blanket 6, which support the ELS board blanks dragged out of the drag pulping machine 2 by the blanket 6, so as to form a flat and continuous blank on the blanket 6. Under the action of several scrapers with inclined tops, the moisture of the ELS board blanks on the blanket 6 is evenly scraped off from the back of the blanket 6 and flows away through the designed pipes. The vacuum dewatering section 5 is equipped with multiple vacuum boxes arranged side by side along the running direction of the blanket, which use vacuum to further absorb the moisture in the ELS board blanks on the blanket 6. After the action of multiple vacuum boxes, an ELS board blank layer with moderate humidity and uniform thickness is formed.

[0034] Optimized, such as Figure 5 As shown, the vacuum box includes a water absorption box 24 and a vacuum adsorption panel 25 covering the water absorption box 24. The vacuum adsorption panel 25 has a herringbone-shaped opening 26, and long slots 27 are formed on both sides of the vacuum adsorption panel 25. Angle steel 28 is provided on the side wall of the water absorption box 24 to be inserted into the long slots 27 on both sides of the vacuum adsorption panel 25. In this embodiment, the vacuum adsorption panel 25 is installed using a snap-on installation method. Long slots 27 are formed on both sides of the vacuum adsorption panel 25, and the angle steel 28 at the corresponding positions on both sides of the water absorption box 24 is used to snap it in. This method is convenient to install, safe to use, and easy to replace. In addition, the herringbone-shaped opening 26 on the upper surface of the vacuum adsorption panel 25 allows the internal structure of the ELS board blank on the blanket 6 to be combed through the herringbone-shaped opening 26. This allows the shorter fibers inside the ELS board blank to overlap and distribute, thereby improving the connection toughness of the internal structure of the ELS board blank and increasing the water absorption efficiency.

[0035] Optional implementation methods, such as Figure 6As shown, the pneumatic blank cutter 7 includes an electromagnetic valve 30, a pneumatic cylinder 29, a connecting rod 31, a blade 32 and a roller 33, the electromagnetic valve 30 and the pneumatic cylinder 29 are installed on the rack 1, the electromagnetic valve 30 is interlocked with a detector for the thickness of the blank on the blank layer compaction roller 9, when the blank wound on the blank layer compaction roller 9 reaches the designed thickness, it transmits the detection signal to the electromagnetic valve 30, controls the electromagnetic valve 30 to work, the electromagnetic valve 30 is electrically connected with the pneumatic cylinder 29, the electromagnetic valve 30 drives the pneumatic cylinder 29 to move, the connecting rod 31 is connected to the movable end of the pneumatic cylinder 29, the blade 32 is installed on the connecting rod 31, and the blade 32 is arranged above the felt 6 parallel to the width direction of the felt 6, the pneumatic cylinder 29 controls the blade 32 to move up and down through the connecting rod 31, the connecting rod 31 is provided with a proximity switch for controlling and feeding back the position of the connecting rod 31, so as to control and feed back the position of the blade 32, so as to cut off the ELS plate blank layer; the roller 33 is arranged on both sides of the falling blade 32, which is used for supporting the felt 6, preventing the felt 6 from being damaged and the blank layer from being layered due to excessive deformation of the felt 6. In this embodiment, the connecting rod 31 is connected with the blade 32 through a rotating shaft, the connecting rod 31 drives the rotating shaft to rotate, and then drives the blade 32 to move in a circular arc, which effectively avoids the problem that the blade 32 rotates at a speed that does not match the speed of the ELS plate blank layer when the felt 6 runs, resulting in too large cut and damage to the felt 6. Further, the upper part of the blade 32 can be adjusted to adjust the gap between the blade 32 and the felt 6 when the blade 32 falls, so that the end position of the blade 32 just contacts without damaging the felt 6.

[0036] As an optimized embodiment, the slurry dragging plate making machine for producing ELS plates of the embodiment further includes a pneumatic felt deviation adjusting mechanism 8 for monitoring and adjusting the transmission position of the felt 6, which is installed on the rack 1 between the pneumatic blank cutter 7 and the blank layer compaction roller 9, and is used for monitoring the position of the center line of the felt 6 during running, and correcting the deviation in time when the deviation occurs; the pneumatic felt deviation adjusting mechanism 8 adopts a high-performance deviation sensor, the sensor signal is connected with a deviation correction roller air bag, and the deviation correction roller air bag works automatically when the position deviation occurs to correct the deviation; the specific structure of the pneumatic felt deviation adjusting mechanism 8 is the prior art, which will not be described here; further, the pneumatic felt deviation adjusting mechanism 8 is also provided with a manual deviation correction device for manual small size adjustment during installation.

[0037] As an optimized embodiment, the slurry dragging plate making machine for producing ELS plates of the embodiment further includes a felt tensioning mechanism 11 for monitoring and adjusting the tension of the felt 6, which is installed on the rack 1 below the dewatering device, and is used for monitoring the tension of the felt 6 and automatically tensioning the felt 6, so that the felt 6 always maintains a certain tension during use. Among them, the felt tensioning mechanism 11 can adopt standard tensioning components in the papermaking industry, and the specific structure is the prior art, which will not be described here.

[0038] The above examples are only illustrative of the present application and do not constitute a limitation to the scope of protection of the present application. Any design identical or similar to the present application falls within the scope of protection of the present application.

Claims

1. A screed and paneliser for producing ELS panels, characterised in that: The application relates to a slurry preparation device, which comprises a slurry preparation machine, a dehydration device, a pneumatic blank cutter and a blank layer compaction roller arranged on a rack in sequence, a deflection roller is arranged below the slurry outlet side of the slurry preparation machine, and the deflection roller is partially arranged in the slurry preparation machine; a blank layer pressure roller is arranged below the blank layer compaction roller, and the blank layer compaction roller is pressed on the blank layer pressure roller; the slurry preparation machine comprises a box body and a stirring mechanism arranged in the box body; a slurry inlet assembly is arranged on one side of the box body to supply slurry into the box body; a slurry outlet assembly is arranged on the other side of the box body; the slurry outlet assembly comprises a slurry outlet partition plate, a slurry outlet bottom plate and a smooth roller; the slurry outlet partition plate is vertically arranged to separate the box body into a slurry stirring area and a slurry outlet area; the smooth roller is arranged in the slurry outlet area; the deflection roller is arranged below the smooth roller and partially arranged in the slurry outlet area; the slurry outlet bottom plate is arranged below the slurry outlet partition plate and spaced from the bottom of the slurry outlet partition plate; the slurry outlet bottom plate extends from the slurry stirring area to the slurry outlet area; a soft rubber is arranged below the end of the slurry outlet bottom plate in the slurry outlet area and abuts against the blanket of the deflection roller; the stirring mechanism comprises two sets of wolf tooth stirrers arranged in parallel in the slurry stirring area of the box body; the blades of the two sets of wolf tooth stirrers are detachably connected with the stirring shafts; and the blades of the two sets of wolf tooth stirrers are cross-distributed.

2. The slipform paver for producing ELS slabs as claimed in claim 1, characterized in that: The inner bottom of the box body in the slurry stirring area is in a W-shaped structure, and the two sets of wolf tooth stirrers are arranged in two groove portions of the W-shaped structure respectively.

3. The slipform paver for producing ELS slabs of claim 1, wherein: The slurry inlet assembly comprises a feeding pipe, a slurry tank and an overflow inlet; the slurry tank is arranged on the side wall of the box body; the bottom of the slurry tank is in an inverted triangular shape; the feeding pipe is connected with the lowest point of the bottom of the slurry tank; and the overflow inlet is arranged on the upper portion of the side wall of the slurry tank and communicates with the box body.

4. The slipform paver for producing ELS slabs of claim 1, wherein: The dehydration device comprises a natural dehydration section and a vacuum dehydration section; the natural dehydration section is provided with a plurality of scraping strips arranged in the running direction of the blanket at intervals; and the vacuum dehydration section is provided with a plurality of vacuum boxes arranged side by side in the running direction of the blanket.

5. The slipform paver for producing ELS slabs of claim 4, wherein: The vacuum box comprises a water absorption box and a vacuum adsorption panel arranged on the water absorption box; the vacuum adsorption panel is provided with cross-herringbone-shaped openings; long grooves are arranged on the two sides of the vacuum adsorption panel; and angle steels corresponding to the long grooves are arranged on the side wall of the water absorption box.

6. The slipform paver for producing ELS slabs of claim 1, wherein: The pneumatic blank cutter comprises an electromagnetic valve, a cylinder, a connecting rod, a blade and a roller; the electromagnetic valve and the cylinder are arranged on the rack; the electromagnetic valve is interlocked with a detector for detecting the thickness of the blank on the blank layer compaction roller; the electromagnetic valve is electrically connected with the cylinder; the connecting rod is connected with the movable end of the cylinder; the blade is arranged above the blanket in parallel with the width direction of the blanket; the cylinder controls the up-down movement of the blade through the connecting rod; the connecting rod is provided with a proximity switch for controlling and feeding back the position of the connecting rod; and the roller has two rollers arranged on the two sides of the blade respectively to support the blanket.

7. The slipform paver for producing ELS slabs of claim 1, wherein: Also included is a pneumatic blanket biasing mechanism for monitoring and adjusting the position of the blanket transfer, said pneumatic blanket biasing mechanism being mounted to the frame between the pneumatic blank separator and the blank lamination compaction roll.

8. The slipform paver for producing ELS slabs of claim 1, wherein: Also included is a blanket tensioning mechanism for monitoring and adjusting the tension of the blanket, said blanket tensioning mechanism being mounted to the frame below the dewatering device.

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