Gypsum slurry discharging and screening device

Abstract

The application discloses a gypsum slurry discharging and screening device, which comprises a vibrating box with conventional vibrating function, a feeding inlet connected with a discharging pipe of a mixer arranged on the sidewall of the vibrating box, and a discharging opening arranged at the bottom of the vibrating box; a bent sieve plate arranged on the inner wall of the vibrating box, which comprises an inclined sieve surface and a flat sieve surface, and is used for screening unqualified gypsum slurry to the flat sieve surface; an abrasive brush arranged in the vibrating box and reciprocally moving on the upper surface of the flat sieve surface to grind and brush the unqualified gypsum slurry to be qualified and pass through the flat sieve surface; and a pumping box arranged below the vibrating box. The gypsum slurry agglomeration phenomenon is eliminated by adopting the vibrating screening and grinding and brushing mode, the adjustable pressure constant pressure discharging is formed by adopting the pressurized conveying mode, the influence of the discharging pressure change is solved, and the turbulent flow phenomenon of the discharging is reduced by adopting the split-flow discharging mode, so that the gypsum slurry is uniformly distributed on the facing paper.

Description

Technical Field

[0001] This invention relates to the field of gypsum board production and processing technology, specifically to a gypsum slurry feeding and screening device. Background Technology

[0002] Gypsum board is a commonly used material in building decoration. In the wet-forming process of gypsum board, gypsum powder needs to be mixed with water, foaming agent, etc., in a mixer. The mixture then flows through a feed pipe between two layers of facing paper, and is finally formed by extrusion through a forming plate. In this process, the mixer directly feeds the gypsum slurry onto the facing paper below through the feed pipe. This process presents the following problems: 1) It is impossible to determine whether the gypsum slurry poured onto the facing paper is up to standard, i.e., whether its fluidity (viscosity) meets the requirements. If there is clumping or adhesion in the poured gypsum slurry, the gypsum slurry will flow unevenly in the pouring pipe, i.e., the gypsum slurry is not evenly distributed in the pouring pipe, resulting in the gypsum slurry not being evenly distributed on the facing paper after pouring.

[0003] 2) The mixer directly feeds the material through the feed pipe. The capacity inside the mixer will change, which will cause the feeding pressure to change. As a result, the flow direction of the gypsum slurry in the feed pipe will also change. However, the shape of the feed pipe remains unchanged. This will result in the uneven flow distribution of the gypsum slurry after it is discharged from the feed pipe (the gypsum slurry will spread unevenly forward after it is discharged from the feed pipe).

[0004] 3) Because the feed pipe of the mixer adopts a circular pipe structure, a large amount of gypsum slurry is discharged directly from the feed pipe. As a result, strong turbulence occurs in the feed pipe. Due to the turbulence, the flow direction of the gypsum slurry is uncertain, making it impossible to control the uniform distribution of the gypsum slurry on the facing paper.

[0005] In summary, there is an issue of uneven distribution of gypsum slurry when it is poured onto the facing paper. Currently, there is no relevant device or mechanism that can reduce the impact of gypsum slurry clumping, pressure changes, and turbulence on the uniform distribution of gypsum slurry on the facing paper during the pouring process. Summary of the Invention

[0006] The purpose of this invention is to provide a gypsum slurry feeding and screening device to solve the technical problems in the prior art that cannot be reduced during gypsum slurry feeding, such as agglomeration, pressure changes, and turbulence.

[0007] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A gypsum slurry feeding and screening device includes: The vibrating box has a conventional vibration function, and its side wall is equipped with a feed port that connects to the feed pipe of the mixer, and its bottom is equipped with a discharge port. A bent screen plate, which is set on the inner wall of the vibrating box, includes an inclined screen surface and a flat screen surface, and is used to screen unqualified gypsum slurry onto the flat screen surface; An abrasive brush is placed inside the vibrating box and reciprocates on the upper surface of the flat screen to abrade unqualified gypsum slurry to make it pass through the flat screen. A pumping box, located below the vibrating box, is used to collect the gypsum slurry discharged from the discharge port through a receiving hopper located above it, and to pump the gypsum slurry to the discharge pipe located at its bottom for discharge. The guide paving pipe has a flat structure and is located at the bottom of the pump box. Its outlet end is equal to the width of the protective paper. It is used to guide the gypsum slurry to be spread on the protective paper. It also has multiple diversion baffles arranged at equal intervals with gradually decreasing height inside. The bent screen plate vibrates with the vibrating box to separate the gypsum slurry on the inclined screen surface, causing the unqualified gypsum slurry to slide onto the flat screen surface. After being polished by the abrasive brush and qualified, it falls into the pumping box together with the qualified gypsum slurry. The pump box pressurizes and delivers the gypsum slurry into the guide paving pipe, where the gypsum slurry is first divided and delivered by multiple diversion baffles, and then merged and discharged to be evenly spread on the protective paper. The pumping box controls the pumping pressure to control the paving flow rate of gypsum slurry entering and exiting the guide paving pipe, thereby adapting the paving flow rate of gypsum slurry to the production speed of gypsum board.

[0008] As a preferred embodiment of the present invention, the abrasive brush includes a brush plate, the bottom of which is provided with a plurality of hard bristles, and the brush plate slides back and forth along the direction parallel to the folds of the bent screen plate. The distribution spacing of the plurality of hard bristle tufts along the direction of brush plate movement is greater than their distribution spacing perpendicular to the direction of brush plate movement.

[0009] As a preferred embodiment of the present invention, the side wall of the vibrating box protrudes outward to form two symmetrical sliding grooves inside it, and the bending screen plate is provided with wing plates on both sides of the flat screen surface, and the ends of the wing plates are curved upward and fixed in the sliding grooves. The bottom of the brush plate has two symmetrically arranged inclined surfaces, and each inclined surface is parallel to the wing plate on the same side, and the height of the inclined surface is higher than the height of the wing plate.

[0010] As a preferred embodiment of the present invention, a sliding opening is provided on the top of the vibration box, and a cylinder slide rail covering the sliding opening is provided on the vibration box. A cylinder slider is slidably arranged on the cylinder slide rail, and a connecting plate is provided at the bottom of the cylinder slider. The lower end of the connecting plate passes through the sliding opening and is fixed to the brush plate. The brush plate is controlled to slide back and forth by the cylinder slider and the connecting plate.

[0011] In a preferred embodiment of the present invention, each of the rigid bristle bundles is rotatably disposed at the bottom of the brush plate; The multiple stiff bristle bundles distributed perpendicular to the direction of brush plate movement rotate in the same direction to generate shear force between two adjacent stiff bristle bundles.

[0012] As a preferred embodiment of the present invention, the brush plate is provided with a cavity, and a plurality of hair-fixing holes communicating with the cavity are provided at the bottom of the brush plate. The stiff bristle bundle includes trumpet-shaped bristles, and a binding ring is provided on the trumpet-shaped bristles, the binding ring being rotatably disposed within the bristle-fixing hole.

[0013] As a preferred embodiment of the present invention, a plate frame is provided in the cavity, and a drive shaft is provided on the plate frame through a plurality of holes aligned with the plurality of hair-fixing holes, and the lower end of the drive shaft is fixedly inserted into the binding ring. Multiple rack rods are equidistantly slidably arranged on the inner wall of the cavity, and a drive gear is provided at the upper end of each drive shaft, and each rack rod meshes with multiple drive gears in the same row; Each of the rack rods has its smooth ends passing through the sidewall of the brush plate and fixed to the inner wall of the vibration box. When the brush plate reciprocates, the drive gear rotates on the rack rod, causing the drive shaft to rotate the clamping ring and the horn bristles to work.

[0014] In a preferred embodiment of the present invention, the receiving hopper and the discharge port are sealed by a flexible connection, and the vibrating box and the pumping box are connected by a vibration isolator; The pumping box is equipped with at least one booster pump. The feed end of the booster pump is connected to the discharge end of the receiving hopper through a pipeline, and the discharge end of the booster pump is connected to the feed end of the discharge pipe through a pipeline. The outlet of the discharge pipe is matched with and connected to the upper port of the guide paving pipe.

[0015] As a preferred embodiment of the present invention, a gate is slidably disposed on the side wall of the discharge pipe, and a pressure cylinder is disposed on the side wall of the discharge pipe at a position higher than the gate. The end of the gate is provided with a fixing frame, and a piston rod is slidably inserted into the pressure cylinder on the fixing frame, and a pressure spring is sleeved on the section of the piston rod located inside the pressure cylinder; The discharge pipe has a gate groove on its inner wall that matches the end of the gate plate, and the gate plate is inserted into the gate groove to seal the discharge pipe.

[0016] As a preferred embodiment of the present invention, the guide paving pipe is divided into a rapid flow section, a slow flow section, and a horizontal flow section, and the slopes of the rapid flow section, the slow flow section, and the horizontal flow section decrease sequentially. The height of the diversion baffle in the rapid flow section is higher than the height in the slow flow section and higher than the height in the horizontal flow section. The diversion baffle stops before the bottom port of the diversion paving pipe, and the stopping end of the diversion baffle smoothly transitions to the inner bottom wall of the diversion paving pipe.

[0017] Compared with the prior art, the present invention has the following advantages: This invention eliminates the clumping of gypsum slurry by using vibrating screening and brushing, and solves the problem of pressure variation by using pressurized conveying to form adjustable constant pressure feeding. Furthermore, it reduces turbulence by using split and merged flow feeding, thereby ensuring that the gypsum slurry is evenly distributed on the facing paper. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in 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 merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the gypsum slurry feeding and screening device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the vibrating box part of the gypsum slurry feeding and screening device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the abrasive brush portion of the gypsum slurry feeding and screening device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the gate section structure of the gypsum slurry feeding and screening device provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the guiding and spreading pipe section of the gypsum slurry feeding and screening device provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the brush plate part of the gypsum slurry feeding and screening device provided in an embodiment of the present invention.

[0020] The labels in the diagram represent the following: 1-Vibrating box; 2-Bending screen plate; 3-Abrasive brush; 4-Pump box; 5-Guide paving pipe; 6-Gate; 11-Feed inlet; 12-Discharge outlet; 13-Slide outlet; 14-Groove; 21-Inclined screen surface; 22-Flat screen surface; 23-Wing plate; 31-Brush plate; 32-Hard bristle bundle; 33-Cylinder slide rail; 34-Cylinder slider; 35-Connecting plate; 41-Receiving hopper; 42-Discharge pipe; 43-Booster pump; 51-Diverter baffle; 52-Rapid flow section; 53-Slow flow section; 54-Horizontal flow section; 61-Fixed frame; 62-Piston rod; 63-Pressure spring; 310- Inclined surface; 311- Cavity; 312- Hair-fixing pore; 313- Plate frame; 314- Drive shaft; 315- Rack and pinion; 316- Drive gear; 321- Horn brush bristles; 322- Binding ring; 421- Pressure cylinder; 422- Gate groove. Detailed Implementation

[0021] 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.

[0022] like Figure 1 As shown, the present invention provides a gypsum slurry feeding and screening device, comprising: Vibration box 1 has conventional vibration function, and its side wall is provided with a feed port 11 connected to the feed pipe of the mixer, and its bottom is provided with a discharge port 12. The bent screen plate 2 is set on the inner wall of the vibrating box 1, including the inclined screen surface 21 and the flat screen surface 22, which is used to screen unqualified gypsum slurry onto the flat screen surface 22. Abrasive brush 3 is set inside the vibrating box 1 and moves back and forth on the upper surface of the flat screen 22 to grind the unqualified gypsum slurry into qualified form and pass it through the flat screen 22. The pumping box 4 is located below the vibrating box 1. It is used to collect the gypsum slurry discharged from the discharge port 12 through the receiving hopper 41 located above it, and to pump the gypsum slurry to the discharge pipe 42 located at its bottom for discharge. The guide paving pipe 5 is a flat structure and is set at the bottom of the pump box 4. Its outlet end is equal to the width of the protective paper. It is used to guide the gypsum slurry to be spread on the protective paper. It is also equipped with multiple diversion baffles 51 arranged at equal intervals and with gradually decreasing height inside. Among them, the bent screen plate 2 vibrates with the vibrating box 1 to separate the gypsum slurry on the inclined screen surface 21, causing the unqualified gypsum slurry to slide onto the flat screen surface 22. After being polished by the abrasive brush 3 and qualified, it falls into the pump box 4 together with the qualified gypsum slurry. The pump box 4 pressurizes and delivers the gypsum slurry to the guide paving pipe 5. The gypsum slurry is first divided and delivered by multiple diversion baffles 51, and then merged and discharged to be evenly spread on the protective paper. The pumping box 4 controls the pumping pressure to control the paving flow rate of gypsum slurry entering and exiting the guide paving pipe 5, thereby adapting the paving flow rate of gypsum slurry to the production speed of gypsum board.

[0023] The screening device in this embodiment mainly utilizes the vibration generated by the vibrating box 1 to cause the bending screen plate 2 to vibrate synchronously. This allows the gypsum slurry that enters the vibrating box 1 from the feed inlet 11 and falls onto the bending screen plate 2 to be screened. Qualified gypsum slurry passes directly through the inclined screen surface 21 and falls down, while unqualified gypsum slurry slides to the flat screen surface 22. The abrasive brush 3 reciprocates on the flat screen surface 22, causing the agglomerated unqualified gypsum slurry to be brushed away and pass through the flat screen surface 22 and fall down, thus preventing the agglomerated unqualified gypsum slurry from falling onto the protective paper.

[0024] After the qualified gypsum slurry falls into the receiving hopper 41, it is pressurized and pumped by the pumping box 4 to the discharge pipe 42, and discharged from the guide paving pipe 5. The gypsum slurry is diverted and transported by multiple diversion baffles 51 in the guide paving pipe 5 to reduce the turbulence between the gypsum slurry fluids, and gradually merges before discharge, so that the gypsum slurry can be spread smoothly and evenly on the facing paper.

[0025] The pumping box 4 pressurizes and pumps the gypsum slurry to the guide paving pipe 5. The flow rate of the gypsum slurry in the guide paving pipe 5 can be controlled by controlling the pumping pressure of the pumping box 4.

[0026] The guide paving pipe 5 is designed with a flat structure so that the width of the gypsum slurry discharged from the guide paving pipe 5 is close to the width of the facing paper, thereby ensuring that the gypsum slurry is evenly spread on the facing paper after being discharged.

[0027] The abrasive brush 3 is used to abrade and pass through the clumps of substandard gypsum slurry onto the flat screen surface 22. During the abrasion process, the substandard gypsum slurry on the inclined screen surface 21 continuously slides towards the flat screen surface 22. Therefore, a preferred embodiment is provided below so that the abrasive brush 3 does not obstruct the sliding of the substandard gypsum slurry on the inclined screen surface 21 towards the flat screen surface 22 while abrading the substandard gypsum slurry.

[0028] like Figure 2 and Figure 3As shown, the abrasive brush 3 includes a brush plate 31, and a plurality of hard bristle bundles 32 are provided at the bottom of the brush plate 31. The brush plate 31 slides back and forth along the direction parallel to the fold of the bent screen plate 2. Among them, the distribution spacing of multiple hard bristle bundles 32 along the moving direction of the brush plate 31 is greater than their distribution spacing perpendicular to the moving direction of the brush plate 31.

[0029] The brush plate 31 slides back and forth along the parallel direction of the folds of the bent screen plate 2, causing the hard bristles 32 to be repeatedly brushed on the flat screen surface 22, thereby causing the unqualified gypsum slurry to be brushed and separated and pass through the flat screen surface 22.

[0030] Furthermore, since the distribution spacing of the hard bristle 32 along the moving direction of the brush plate 31 is relatively large, the hard bristle 32 does not affect the sliding of the unqualified gypsum slurry on the inclined screen surface 21 to the flat screen surface 22 during the brushing process; and the distribution spacing of the hard bristle 32 perpendicular to the moving direction of the brush plate 31 is relatively small, which improves the brushing effect on the unqualified gypsum slurry on the flat screen surface 22.

[0031] Since the brush plate 31 needs to slide back and forth on the flat screen surface 22, space needs to be reserved on both sides of the brush plate 31 so that the hard bristles 22 can brush the entire flat screen surface 22. Therefore, in order to enable the hard bristles 22 at the bottom of the brush plate 31 to fully brush the flat screen surface 22, a preferred embodiment is provided below.

[0032] like Figure 3 As shown, the side wall of the vibrating box 1 protrudes outward to form two symmetrical grooves 14 inside it. The bent screen plate 2 has wing plates 23 on both sides of the flat screen surface 22, and the ends of the wing plates 23 are curved upward and fixed in the grooves 14. The bottom of the brush plate 31 is symmetrically provided with two inclined surfaces 310, and each inclined surface 310 is parallel to the wing plate 23 on the same side, and the height of the inclined surface 310 is higher than the height of the wing plate 23.

[0033] The symmetrically arranged grooves 14 on the side wall of the vibrating box 1 allow the end of the brush plate 31 to move into it, so that the brush plate 31 can reciprocate and the hard bristles 32 at the bottom can brush the edge of the flat screen surface 22, improve the brushing effect, and prevent unqualified gypsum slurry from accumulating on the flat screen surface 22.

[0034] The wing plate 23 is set in the chute 14 with an upward tilt, and the bottom of the brush plate 31 is provided with an inclined surface 310 parallel to the wing plate 23. Thus, the brush plate 31 will not contact the wing plate 23 when it moves back and forth. The gypsum slurry pushed onto the wing plate 23 by the hard bristles 32 will slide down onto the flat screen surface 22 under the action of gravity. Moreover, the sliding effect is better due to the vibration of the vibrating box 1, which prevents the gypsum slurry from accumulating on the wing plate 23.

[0035] The following is a preferred embodiment for driving the brush plate 31 to reciprocate within the vibration box 1.

[0036] like Figure 2 and Figure 3 As shown, a sliding opening 13 is provided on the top of the vibration box 1, and a cylinder slide rail 33 covering the sliding opening 13 is provided on the vibration box 1. A cylinder slider 34 is slidably provided on the cylinder slide rail 33, and a connecting plate 35 is provided at the bottom of the cylinder slider 34. The lower end of the connecting plate 35 passes through the sliding opening 13 and is fixed on the brush plate 31. The brush plate 31 is controlled to slide back and forth by the cylinder slider 34 and the connecting plate 35.

[0037] The cylinder slide rail 33 drives the cylinder slider 34 to move, and the cylinder slider 34 drives the brush plate 31 to move through the connecting plate 35. Thus, the reciprocating movement of the brush plate 31 can be controlled by the cylinder slide rail 33 in conjunction with the cylinder slider 34 and the connecting plate 35.

[0038] Since the brush plate 31 can only drive the rigid bristles 32 to slide horizontally back and forth and grind the unqualified gypsum slurry on the flat screen surface 22, some of the harder clumps of unqualified gypsum slurry located between the rigid bristles 32 cannot be separated and fall through the flat screen surface 22 as the rigid bristles 32 slide back and forth. Therefore, a preferred embodiment is provided below to gradually grind and separate the unqualified gypsum slurry that cannot be directly ground between the rigid bristles 32.

[0039] like Figure 6 As shown, each stiff bristle tuft 32 is rotatably disposed at the bottom of the brush plate 31; Among them, the multiple hard bristle bundles 32 distributed perpendicular to the direction of movement of the brush plate 31 rotate in the same direction, so as to generate shear force between two adjacent hard bristle bundles 32.

[0040] The rigid bristle bundles 32 are arranged at the bottom of the brush plate 31 in a rotating manner. When the rigid bristle bundles 32 rotate, the rotation direction between two adjacent rigid bristle brushes 32 is the same, so as to generate interlaced shearing forces, thereby grinding and cutting the unqualified gypsum slurry located between the rigid bristle brushes 32, improving the treatment effect of the rigid bristle bundles 32 on the unqualified gypsum slurry, and making it easier for the unqualified gypsum slurry to be ground into qualified gypsum slurry.

[0041] like Figure 6 As shown, a cavity 311 is provided inside the brush plate 31, and a plurality of hair-fixing holes 312 communicating with the cavity 311 are provided at the bottom of the brush plate 31. The stiff bristle bundle 32 includes trumpet bristles 321, and a binding ring 322 is provided on the trumpet bristles 321. The binding ring 322 is rotatably disposed in the bristle fixing hole 312.

[0042] The lower diameter of the trumpet-shaped bristles 321 is larger than the upper diameter, so each hard bristle tuft 32 can cover a larger area, thereby reducing the total number of hard bristle tufts 32 and reducing costs; and increasing the total brushing area and improving the brushing effect.

[0043] The horn brush bristles 321 are formed by multiple stiff bristles being fixed by a binding ring 322. In order for the horn brush bristles 321 to rotate when the brush plate 31 reciprocates, a preferred embodiment is provided below to drive the horn brush bristles 321 to rotate as the brush plate 31 moves.

[0044] like Figure 6 As shown, a plate frame 313 is provided in the cavity 311, and a drive shaft 314 is provided on the plate frame 313 through multiple holes aligned with multiple hair-fixing holes 312, and the lower end of the drive shaft 314 is fixedly inserted into the binding ring 322. Multiple rack rods 315 are equidistantly slidably arranged on the inner wall of the cavity 311, and a drive gear 316 is provided at the upper end of each drive shaft 314, and each rack rod 315 meshes with multiple drive gears 316 in the same row. Each rack rod 315 has its smooth ends passing through the side wall of the brush plate 31 and fixed to the inner wall of the vibration box 1. When the brush plate 31 reciprocates, the drive gear 316 rotates on the rack rod 315, so that the drive shaft 314 rotates the clamping ring 322 and the horn bristles 321 to work.

[0045] When the brush plate 31 moves back and forth, and the rack rod 315 is fixed on the vibration box 1, a relative motion is generated between the rack rod 315 and the brush plate 31.

[0046] Since the plate frame 313 is fixed inside the cavity 311, and the drive gear 316 is mounted on the plate frame 313 via the drive shaft 314, when relative movement occurs between the rack 315 and the brush plate 31, the drive gear 316 is fixed on the rack 315, thereby causing the drive shaft 314 to rotate and drive the bristle 322 and the horn bristles 321 to rotate. This allows the hard bristle bundles 32 to rotate synchronously to assist in brushing when the brush plate 31 reciprocates and slides, thus improving the brushing effect.

[0047] like Figure 1 As shown, a flexible connection seal is used between the receiving hopper 41 and the discharge port 12, and a vibration isolator is used to connect the vibrating box 1 and the pumping box 4. At least one booster pump 43 is installed in the pumping box 4. The feed end of the booster pump 43 is connected to the discharge end of the receiving hopper 41 through a pipeline, and the discharge end of the booster pump 43 is connected to the feed end of the discharge pipe 42 through a pipeline. The outlet of the discharge pipe 42 is matched and connected to the upper port of the guide paving pipe 5.

[0048] The vibratory box 1 and the pump box 4 are connected by a flexible connection seal and a vibration isolator, which can prevent the gypsum slurry from spilling and also prevent vibration from affecting the operation of the booster pump 43.

[0049] The booster pump 43 can be one of a screw pump, a plunger pump, or a diaphragm pump, and one or more booster pumps 43 can be set according to production requirements to change the adjustment range of the discharge pressure and discharge flow rate of the discharge pipe 42.

[0050] When the discharge pipe 42 discharges material to the guide paving pipe 5, if the gypsum slurry is not completely covered at the port of the guide paving pipe 5, there will be uneven distribution of the gypsum slurry among the multiple diversion baffles 51. Therefore, in order to ensure that the gypsum slurry is evenly distributed among the multiple diversion baffles 51, a preferred embodiment is provided below, so that the gypsum slurry converges and pressurizes at the upper end of the guide paving pipe 5 to be evenly distributed among the multiple diversion baffles 51.

[0051] like Figure 4 As shown, a gate 6 is slidably provided on the side wall of the discharge pipe 42, and a pressure cylinder 421 is provided on the side wall of the discharge pipe 42 at a position higher than the gate 6. A fixing frame 61 is provided at the end of the gate plate 6, and a piston rod 62 is slidably inserted into the pressure cylinder 421 on the fixing frame 61, and a pressure spring 63 is sleeved on the section of the piston rod 62 located in the pressure cylinder 421. The inner wall of the discharge pipe 42 is provided with a gate groove 422 that matches the end of the gate 6. The gate 6 is inserted into the gate groove 422 to seal the discharge pipe 42.

[0052] The booster pump 43 pumps the gypsum slurry from the receiving hopper 41 to the discharge pipe 42, causing the pressure in the discharge pipe 42 to gradually increase, and at the same time, the amount of gypsum slurry in the discharge pipe 42 gradually increases.

[0053] The increased pressure inside the discharge pipe 42 increases the pressure inside the pressure cylinder 421, forcing the piston rod 62 to move outward and compress the pressure spring 63. Then, the piston rod 62 pushes the gate plate 6 away from the gate slot 422 through the fixed frame 61 and opens the discharge pipe 42. The gypsum slurry in the discharge pipe 42 can then cover and enter the guide paving pipe 5 and be evenly distributed by multiple diversion baffles 51.

[0054] Furthermore, the greater the pressure inside the discharge pipe 42 (the greater the pumping pressure of the booster pump 43), the larger the area of ​​the gate 6 opening the discharge pipe 42, resulting in a larger flow rate of gypsum slurry. In other words, the flow rate of gypsum slurry can be controlled by boosting the pressure so that the gypsum slurry paving speed matches the production speed.

[0055] Furthermore, the upper end of the diversion baffle 51 can extend into the discharge pipe 42 and divide the interior of the discharge pipe 42 into multiple flow channels. The diversion baffle 51 slides in contact with the gate 6, which can further prevent the gypsum slurry from flowing turbulently and unevenly in the discharge pipe 42.

[0056] The guide paving pipe 5 is used to evenly pour qualified gypsum slurry onto the facing paper. Therefore, a preferred embodiment is provided below so that the guide paving pipe 5 can reduce the flow rate of the gypsum slurry, thereby making the gypsum slurry smoothly and evenly distributed on the facing paper.

[0057] like Figure 5 As shown, the guide paving pipe 5 is divided into a rapid flow section 52, a slow flow section 53, and a horizontal flow section 54, with the slopes of the rapid flow section 52, the slow flow section 53, and the horizontal flow section 54 decreasing sequentially. The height of the diversion baffle 51 at the rapid flow section 52 is higher than the height at the slow flow section 53, and also higher than the height at the horizontal flow section 54. The diversion baffle 51 ends at the bottom port of the diversion paving pipe 5, and the end of the diversion baffle 51 smoothly transitions to the inner bottom wall of the diversion paving pipe 5.

[0058] The gypsum slurry entering the guide paving pipe 5 passes through the rapid flow section 52, the slow flow section 53, and the flat flow section 54 in sequence, so that the gypsum slurry is buffered step by step, thereby reducing the flow velocity of the gypsum slurry discharged from the guide paving pipe 5 and reducing the impact force, so that the gypsum slurry is evenly spread on the uniformly moving protective paper.

[0059] The height of the diversion baffle 51 decreases sequentially in the rapid flow section 52, the slow flow section 53, and the calm flow section 54. That is, in the rapid flow section 52, the gypsum slurry flow velocity is too fast and the turbulence is strong. The diversion is used to reduce the turbulence, thereby making the gypsum slurry feeding more uniform.

[0060] From the slow flow section 53 to the horizontal flow section 54, the flow rate of the gypsum slurry gradually decreases and the turbulence gradually diminishes. Therefore, the height of the diversion baffle 51 gradually decreases so that the diverted gypsum slurry merges and is completely mixed before being discharged from the guide paving pipe 5, so as to be evenly spread on the surface of the facing paper.

[0061] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A gypsum slurry feeding and screening device, characterized in that, include: The vibrating box (1) has a conventional vibration function, and its side wall is provided with a feed inlet (11) connected to the feed pipe of the mixer, and its bottom is provided with a discharge port (12). A bent screen plate (2) is set on the inner wall of the vibrating box (1), including an inclined screen surface (21) and a flat screen surface (22), for screening unqualified gypsum slurry onto the flat screen surface (22); Abrasive brush (3) is set inside the vibrating box (1) and moves back and forth on the upper surface of the flat screen (22) to grind the unqualified gypsum slurry into qualified form and pass it through the flat screen (22). The pump box (4) is located below the vibrating box (1) and is used to collect the gypsum slurry discharged from the discharge port (12) through the receiving hopper (41) located above it, and to pump the gypsum slurry to the discharge pipe (42) located at its bottom for discharge. The guide paving pipe (5) is a flat structure and is located at the bottom of the pump box (4). Its outlet end is equal to the width of the protective paper and is used to guide the gypsum slurry to be spread on the protective paper. It is also equipped with multiple diversion baffles (51) arranged at equal intervals and with gradually decreasing height inside. The bent screen plate (2) vibrates with the vibrating box (1) to separate the gypsum slurry on the inclined screen surface (21), causing the unqualified gypsum slurry to slide onto the flat screen surface (22), and after being polished by the abrasive brush (3) to be qualified, it falls into the pump box (4) together with the qualified gypsum slurry. The pump box (4) pressurizes and delivers the gypsum slurry into the guide paving pipe (5), where the gypsum slurry is first divided and delivered by multiple diversion baffles (51), and then merged and discharged to be evenly spread on the protective paper. The pump box (4) controls the pumping pressure to control the paving flow rate of gypsum slurry entering the guide paving pipe (5) and exiting, so that the paving flow rate of gypsum slurry adapts to the production speed of gypsum board. The guide paving pipe (5) is divided into a rapid flow section (52), a slow flow section (53) and a flat flow section (54), and the slopes of the rapid flow section (52), the slow flow section (53) and the flat flow section (54) decrease sequentially. The height of the diversion baffle (51) at the rapid flow section (52) is higher than the height at the slow flow section (53) and higher than the height at the horizontal flow section (54); The diversion baffle (51) ends before the bottom port of the diversion paving pipe (5), and the end of the diversion baffle (51) smoothly transitions to the inner bottom wall of the diversion paving pipe (5).

2. The gypsum slurry feeding and screening device according to claim 1, characterized in that, The abrasive brush (3) includes a brush plate (31), the bottom of which is provided with a plurality of hard bristle bundles (32), and the brush plate (31) slides back and forth along the parallel direction of the fold lines of the bent screen plate (2). The distribution spacing of the plurality of hard bristle bundles (32) along the direction of movement of the brush plate (31) is greater than the distribution spacing perpendicular to the direction of movement of the brush plate (31).

3. The gypsum slurry feeding and screening device according to claim 2, characterized in that, The sidewall of the vibrating box (1) protrudes outward to form two symmetrical grooves (14) inside it. The bent screen plate (2) has wing plates (23) on both sides of the flat screen surface (22), and the ends of the wing plates (23) are raised upward and fixed in the grooves (14). The bottom of the brush plate (31) is symmetrically provided with two inclined surfaces (310), and each of the inclined surfaces (310) is parallel to the wing plate (23) on the same side, and the height of the inclined surface (310) is higher than the height of the wing plate (23).

4. A gypsum slurry feeding and screening device according to claim 2 or 3, characterized in that, A sliding opening (13) is provided on the top of the vibration box (1), and a cylinder slide rail (33) covering the sliding opening (13) is provided on the vibration box (1). A cylinder slider (34) is slidably provided on the cylinder slide rail (33), and a connecting plate (35) is provided at the bottom of the cylinder slider (34). The lower end of the connecting plate (35) passes through the sliding opening (13) and is fixed on the brush plate (31). The brush plate (31) is controlled to slide back and forth by the cylinder slider (34) and the connecting plate (35).

5. The gypsum slurry feeding and screening device according to claim 4, characterized in that, Each of the aforementioned stiff bristle tufts (32) is rotatably disposed at the bottom of the brush plate (31); The multiple stiff bristle bundles (32) distributed perpendicular to the direction of movement of the brush plate (31) rotate in the same direction to generate shear force between two adjacent stiff bristle bundles (32).

6. The gypsum slurry feeding and screening device according to claim 5, characterized in that, The brush plate (31) has a cavity (311) inside, and a plurality of hair-fixing holes (312) communicating with the cavity (311) are provided at the bottom of the brush plate (31). The hard bristle bundle (32) includes trumpet bristles (321), and a binding ring (322) is provided on the trumpet bristles (321), and the binding ring (322) is rotatably disposed in the bristle fixing hole (312).

7. The gypsum slurry feeding and screening device according to claim 6, characterized in that, A plate frame (313) is provided in the cavity (311), and a drive shaft (314) is provided on the plate frame (313) through a plurality of holes aligned with the plurality of hair-fixing holes (312), and the lower end of the drive shaft (314) is fixedly inserted into the binding ring (322). Multiple rack rods (315) are equidistantly slidably arranged on the inner wall of the cavity (311), and a drive gear (316) is provided at the upper end of each drive shaft (314), and each rack rod (315) meshes with multiple drive gears (316) in the same row. Each of the rack rods (315) has its smooth ends passing through the sidewall of the brush plate (31) and fixed to the inner wall of the vibration box (1). When the brush plate (31) reciprocates, the drive gear (316) rotates on the rack rod (315) so that the drive shaft (314) rotates the ferrule (322) and the horn bristles (321) to work.

8. The gypsum slurry feeding and screening device according to claim 1, characterized in that, The receiving hopper (41) and the discharge port (12) are sealed by a soft connection, and the vibration box (1) and the pumping box (4) are connected by a vibration isolator; At least one booster pump (43) is provided in the pump box (4). The feed end of the booster pump (43) is connected to the discharge end of the receiving hopper (41) through a pipeline. The discharge end of the booster pump (43) is connected to the feed end of the discharge pipe (42) through a pipeline. The outlet of the discharge pipe (42) is matched with and connected to the upper port of the guide paving pipe (5).

9. A gypsum slurry feeding and screening device according to claim 8, characterized in that, A gate (6) is slidably provided on the side wall of the discharge pipe (42), and a pressure cylinder (421) is provided on the side wall of the discharge pipe (42) at a position higher than the gate (6). The end of the gate (6) is provided with a fixing frame (61), and a piston rod (62) is slidably inserted into the pressure cylinder (421) on the fixing frame (61), and a pressure spring (63) is sleeved on a section of the piston rod (62) inside the pressure cylinder (421). The inner wall of the discharge pipe (42) is provided with a gate groove (422) that matches the end of the gate (6), and the gate (6) is inserted into the gate groove (422) to seal the discharge pipe (42).

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