CN112076902A - Fire-retardant foaming ball reposition of redundant personnel sprinkling system of fibreboard - Google Patents

Fire-retardant foaming ball reposition of redundant personnel sprinkling system of fibreboard Download PDF

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Publication number
CN112076902A
CN112076902A CN202010826852.1A CN202010826852A CN112076902A CN 112076902 A CN112076902 A CN 112076902A CN 202010826852 A CN202010826852 A CN 202010826852A CN 112076902 A CN112076902 A CN 112076902A
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CN
China
Prior art keywords
pipe
foaming ball
foaming
ball
spraying
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Pending
Application number
CN202010826852.1A
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Chinese (zh)
Inventor
陈建新
魏叶满
王佳瑞
陈铮颍
刘翔晖
郭祥桃
王永闽
陈德金
吴祖顺
叶新强
许梅芳
阮国栋
雷梅兰
张建辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujian Yonglin Household Co ltd
Yongan Wood Based Plate Factory Of Fujian Yongan Forestry Group Co ltd
Original Assignee
Fujian Yonglin Household Co ltd
Yongan Wood Based Plate Factory Of Fujian Yongan Forestry Group Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Fujian Yonglin Household Co ltd, Yongan Wood Based Plate Factory Of Fujian Yongan Forestry Group Co ltd filed Critical Fujian Yonglin Household Co ltd
Priority to CN202010826852.1A priority Critical patent/CN112076902A/en
Publication of CN112076902A publication Critical patent/CN112076902A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B05B7/1486—Spray pistols or apparatus for discharging particulate material for spraying particulate material in dry state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1431—Arrangements for supplying particulate material comprising means for supplying an additional liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/144—Arrangements for supplying particulate material the means for supplying particulate material comprising moving mechanical means
    • B05B7/1445—Arrangements for supplying particulate material the means for supplying particulate material comprising moving mechanical means involving vibrations

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

The invention provides a flame-retardant foaming ball shunting and spraying system for a fiberboard, which comprises a shunting device and a spraying device, wherein the shunting device comprises a foaming ball bin, a spiral discharging machine, a distribution bin and a foaming ball discharging pipe; the spraying device comprises a pneumatic conveying assembly, a spraying assembly and an air return collecting assembly, wherein the middle parts of pneumatic conveying hoses of the pneumatic conveying assembly are connected with flame-retardant foaming ball discharging pipes; a space formed between the inner wall and the outer wall of a spray pipe of the spray assembly is an air return collecting chamber; each foaming ball nozzle is arranged on the spraying pipe in a penetrating way, and two ends of each foaming ball accelerating pipe are respectively connected with the pneumatic conveying hose and the foaming ball nozzle; and a plurality of air-breathing holes are distributed on the pipe wall of each foaming ball nozzle; two ends of the spraying pipe are sleeved with bearings. The foaming ball spraying device can control the foaming ball to be sprayed to each section position of the section layer of the fiber board, reduce the density of the board, meanwhile, the foaming ball is not positioned on the same straight line at the section position of the board, the side nail holding force of the board is enhanced, and meanwhile, the board is not easy to deform.

Description

Fire-retardant foaming ball reposition of redundant personnel sprinkling system of fibreboard
[ technical field ] A method for producing a semiconductor device
The invention relates to a flame-retardant foaming ball shunting spraying system for a fiberboard.
[ background of the invention ]
The fiberboard is an artificial board made up by using wood fibre or other plant fibre as main raw material, making fibre, applying adhesive, drying fibre, paving and forming, and hot-pressing. The fiber board can be classified into high density fiber board, medium density fiber board and low density fiber board according to volume weight. The fiber board is uniform in quality and can be widely applied to processing of furniture, floors, wallboards, packing boxes, suspended ceilings and the like. After the development of the fiberboard manufacturing technology for more than 40 years, the production technology is limited, the physical and mechanical properties of the fiberboard cannot be greatly improved, and particularly, in the development of the lightweight fiberboard with low density, the flame-retardant board with high performance and the density of less than 500kg/M3 cannot be produced.
Along with the improvement of living standard, the safety meaning of people is also improved, and the medium-low density fiberboard not only needs to meet the original physical and mechanical indexes, but also needs to have enough flame retardant capability and portability. In the prior production of the flame-retardant lightweight fiber board, the density is 450kg/m3-490kg/m3The light flame-retardant board is difficult to prepare, and the main reason is that in the density range, the physical mechanical property of the board is positively correlated with the density of the board, and simultaneously, the difficulty of reducing the density of the board is increased due to the higher density of the flame retardant. The existing solution is to uniformly add flame retardant and flame retardant foaming agent into dry fiber after sizing, so as to reduce the average density of the fiber board.
The disadvantages of this approach are: the sanding layer on the surface of the fiberboard contains foaming spherical particles, and after the pre-cured layer on the surface of the foaming spherical particles is removed by sanding, large-area irregular pits appear on the board, so that the subsequent decoration and the attractiveness of the board are influenced. In order to solve the problem, the existing method adopts a fiber two-layer paving method to pave the foaming balls in the middle, so that the problem that the fiber sanding surface layer contains foaming ball particles is solved, but two problems exist. Firstly, the middle layer is a foaming ball, so that the sheet is hollow, and the physical and mechanical performance indexes such as the side nail-holding power and the like are insufficient; secondly, when the foaming ball particles are overlapped or the particle sizes are not uniform, the density of the fiber layer of the fiber board is seriously unbalanced, and the board is easy to deform. No foaming ball particle spraying device and fiber paving combined application device can supply in the market, so that the foaming ball particles can be sprayed to each section position of a section layer of a fiberboard, and the density of the board is reduced.
[ summary of the invention ]
The technical problem to be solved by the invention is to provide a flow-dividing and spraying system for a flame-retardant foaming ball of a fiberboard, which can control the foaming ball to be sprayed to each section position of a section layer of the fiberboard, reduce the density of the board, and simultaneously, the position of the foaming ball on the section of the board is not on a straight line, so that the side nail-holding force of the board is enhanced, and meanwhile, the board is not easy to deform. .
The invention is realized by the following steps:
the flame-retardant foaming ball shunting and spraying system for the fiberboard comprises a shunting device and a spraying device, wherein the shunting device comprises a foaming ball bin, a spiral discharging machine, a distribution bin and a foaming ball discharging pipe;
a material distributing plate, a plurality of metering bins and a flow limiting plate are sequentially arranged in the distributing bin from top to bottom, first through holes are distributed in the distributing plate, and inlets of the metering bins are communicated with the corresponding first through holes; second through holes are distributed on the flow limiting plate, and the outlet of each metering bin is communicated with the corresponding second through hole; the lower end of each second through hole is communicated with the corresponding foaming ball blanking pipe;
the spraying device comprises a pneumatic conveying assembly, a spraying assembly and a return air collecting assembly, wherein the pneumatic conveying assembly comprises a fan, an air box, a pneumatic conveying hose and an air volume adjusting valve, the fan is connected with an air inlet of the air box, an air outlet of the air box is connected with a plurality of pneumatic conveying pipes, and each pneumatic conveying pipe is provided with the air volume adjusting valve; the middle part of each pneumatic conveying hose is connected with a foaming ball discharging pipe;
the spraying assembly comprises a spraying pipe, a plurality of foaming ball accelerating pipes and a plurality of foaming ball nozzles, each foaming ball accelerating pipe is arranged in the spraying pipe, and a space formed between the inner wall and the outer wall of the spraying pipe is a return air collecting chamber; one end of each foaming ball accelerating tube is respectively connected with a corresponding pneumatic conveying hose, each foaming ball nozzle is arranged on the spraying tube in a penetrating way, the inlet of each foaming ball nozzle is connected with the corresponding foaming ball accelerating tube, and the outlet of each foaming ball nozzle extends to the outer side of the spraying tube; and a plurality of air-breathing holes are distributed on the pipe wall of each foaming ball nozzle; two ends of the spraying pipe are sleeved with bearings, and the two bearings are fixed on the trolley;
the return air collecting assembly comprises a return air collecting pipe, a return air main pipe, a return air valve, an air inlet pipe and an air inlet valve, the return air collecting pipe is communicated with a return air collecting chamber, the other end of the return air collecting pipe is connected to the return air main pipe, the return air main pipe is connected to the middle of the air inlet pipe, one end of an outlet of the air inlet pipe is connected with a fan, the return air valve is arranged on the return air main pipe, and the air inlet valve is arranged at the inlet end of the air inlet pipe.
Further, a vibrator is arranged outside the distribution bin.
Furthermore, a first handle is arranged at one end of the distribution plate, and a second handle is arranged at one end of the flow limiting plate; the distribution bin is internally provided with two mounting grooves, one end of each mounting groove penetrates through the side wall of the distribution bin, the distribution plate and the flow limiting plate are detachably arranged in the mounting grooves, and the first handle and the second handle extend out of the side wall of the distribution bin.
Furthermore, each metering bin comprises a cylindrical upper part and a conical lower part which are arranged up and down, and the diameter of an inlet of each metering bin is larger than that of an outlet of each metering bin.
Furthermore, the upper edge and the lower edge of the first through hole and the upper edge of the second through hole are provided with chamfers.
Furthermore, the diameter of the first through hole is 3-5mm, and the diameter of the second through hole is 3-4 mm.
Further, the maximum angle at which the spray pipe can rotate back and forth along the bearings at both ends is 15 °.
Furthermore, the included angle between each foaming ball nozzle and the perpendicular bisector of the spraying pipe is-110 degrees to +110 degrees.
Further, the length of each foaming ball nozzle is increased along the spraying pipe from bottom to top in sequence.
The invention has the following advantages:
1. the flame-retardant foaming ball spraying device can control the foaming balls to be sprayed to each section position of the section layer of the fiberboard, reduce the density of the board, realize that the foaming balls can be sprayed continuously in different angles in front and back and below, horizontal shooting, parabolic shooting, left-right moving sweeping, free falling, downward semicircular modes and the like, the positions of the foaming particles on the section of the board are not on the same straight line, the side nail-holding force of the board is enhanced, and meanwhile, the board is not easy to deform; and large-area irregular pits can not be generated on the plate, and the subsequent decoration and the attractiveness of the plate are not influenced.
2. The fiber layer density of the fiber board produced by the lightweight flame-retardant fiberboard produced by the invention under the same production process condition is balanced, the board is not easy to deform and can reach the physical and mechanical performance indexes such as the side nail holding force of the board, and the lightweight flame retardance meets the requirements of the national GB8624-2006 flame-retardant board grade B and C of the Standard regulation of building material and product burning performance grade. Namely, the performance requirement index used in a dry state in the standard of the lightweight fiberboard in the lightweight fiberboard industry under the density of 450-490 kilograms per cubic meter also meets the requirement that the lightweight flame retardance meets the national C-grade flame-retardant fire-proof plate.
[ description of the drawings ]
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
FIG. 1 is a schematic view of a fire-retardant foam ball flow-dividing spraying system for fiber board according to the present invention.
Fig. 2 is a schematic view of the flame-retardant foaming ball shunt spraying system of the fiberboard cooperating with the fiber paving device.
FIG. 3 is a schematic view of the leveler roller of the present invention.
Fig. 4 is a side view of the spray assembly of the present invention.
Fig. 5 is a sectional view of a foaming ball nozzle of the present invention.
Fig. 6 is a schematic structural diagram of a material distributing plate according to an embodiment of the present invention.
FIG. 7 is a cross-sectional view of a distributor plate according to an embodiment of the present invention.
FIG. 8 is a schematic top view of a distribution plate according to an embodiment of the present invention.
Fig. 9 is a schematic structural view of a restrictor plate according to an embodiment of the present invention.
Fig. 10 is a side view of a dry fiberboard blank produced by the present invention.
FIG. 11 is a graph showing the effect of filling the grooves after the foam beads in the dry fiber board blanks produced by the present invention expand.
[ detailed description ] embodiments
Referring to fig. 1-11, the invention relates to a fire-retardant foaming ball shunting spraying system for fiberboard, which comprises a shunting device 2 and a spraying device 3, and can be matched with a fiber paving device 1, wherein the fiber paving device comprises a fiber discharging bin 11, a discharging conveyer belt 12, a scattering roller 13, a paving bin 14, a slab conveyer belt 15 and a leveling roller 16, the discharging conveyer belt 12 is arranged at the bottom of the fiber discharging bin 11, a paving rake 17 is further arranged above the discharging conveyer belt 12, a plurality of scattering rollers 13 are arranged at a discharging port of the fiber discharging bin 11, the slab conveyer belt 15 is arranged at the bottom of the paving bin 14 and extends to the outside of an outlet of the paving bin 14, and the leveling roller 16 is arranged at the outlet of the paving bin 14 and is positioned above the slab conveyer belt 15; short beam teeth 161 and long beam teeth 162 are distributed on the leveling roller 16, and the length of the long beam teeth 162 is longer than that of the short beam teeth 161; the length of the long beam teeth 162 is 40-60mm longer than the length of the short beam teeth 161.
The flow dividing device 2 comprises a foaming ball bin 21, a spiral discharging machine 22, a distribution bin 23 and a foaming ball discharging pipe 24, wherein the spiral discharging machine 22 is arranged at the outlet of the foaming ball bin 21, the discharging hole of the spiral discharging machine 22 is arranged above the distribution bin 23, and the foaming ball discharging pipe 24 is connected with a flow limiting plate 234 below the distribution bin 23;
a material distributing plate 231, a distributing plate 232, a plurality of metering bins 233 and a current limiting plate 234 are sequentially arranged in the distributing bin 23 from top to bottom, first through holes 2321 are distributed on the distributing plate 232, and inlets of the metering bins 233 are communicated with the corresponding first through holes 2321; second through holes 2341 are distributed in the flow limiting plate 234, and the outlet of each metering bin 233 is communicated with the corresponding second through hole 2341; the lower end of each second through hole 2341 is communicated with the corresponding foaming ball discharging pipe 24;
the spraying device 3 comprises a pneumatic conveying assembly 31, a spraying assembly 32 and a return air collecting assembly 33, wherein the pneumatic conveying assembly 31 comprises a fan 311, an air box 312, a pneumatic conveying hose 313 and an air volume adjusting valve 314, the fan 311 is connected with an air inlet of the air box 312, an air outlet of the air box 312 is connected with a plurality of pneumatic conveying pipes 313, and each pneumatic conveying pipe 313 is provided with the air volume adjusting valve 314; the middle part of each pneumatic conveying hose 314 is connected with a foaming ball discharging pipe 24;
the spraying assembly 32 is positioned in the paving bin 14 and is erected above the slab conveying belt 15 and below a discharge port of the fiber discharging bin 11, the spraying assembly 32 comprises a spraying pipe 321, a plurality of foaming ball accelerating pipes 322 and a plurality of foaming ball nozzles 323, each foaming ball accelerating pipe 322 is arranged in the spraying pipe 321, and a space formed between the inner wall and the outer wall of the spraying pipe 321 is a return air collecting chamber 3211; one end of each foaming ball accelerating tube 322 is respectively connected with a corresponding pneumatic conveying hose 313, each foaming ball nozzle 323 is arranged on the spraying tube 321 in a penetrating way, the inlet of each foaming ball nozzle 323 is connected with the corresponding foaming ball accelerating tube 322, and the outlet of each foaming ball nozzle 323 extends to the outer side of the spraying tube 321; threads (not shown) are arranged on the inner wall and the outer wall of the spraying pipe 321, which penetrate through the through hole of the foaming ball nozzle 323, two groups of threads 3231 corresponding to the threads are arranged on each foaming ball nozzle 323, and the spraying pipe 321 is connected with each foaming ball nozzle 323 through the threads and the threads 3231; the inlet of each of the foaming ball nozzles 323 is connected to the corresponding foaming ball acceleration pipe 322 via a ball joint 3232.
And a plurality of air-eliminating holes 3233 are distributed on the pipe wall of each foaming ball nozzle 323; the diameter of the air-eliminating hole 3 is smaller than the smallest diameter of the foaming ball, and is usually 1mm-1.5 mm; two ends of the spraying pipe 321 are sleeved with bearings 324, and the two bearings 324 are fixed on a trolley 325; the end of the spray pipe 321 is also connected with an oscillator 326; the oscillator 326 cooperates with the bearings 324 to control the spray pipe 321 to rotate back and forth along the bearings 324 at both ends.
The arrangement positions of the long beam teeth 162 on the leveling roller 16 correspond to the foaming ball nozzles 323;
the return air collecting component 33 comprises a return air collecting pipe 331, a return air main pipe 332, a return air valve 333, an air inlet pipe 334 and an air inlet valve 335, the return air collecting pipe 331 is communicated with a return air collecting chamber 3211, the other end of the return air collecting pipe 331 is connected to the return air main pipe 332, the return air main pipe 332 is connected to the middle of the air inlet pipe 334, one end of an outlet of the air inlet pipe 334 is connected with the fan 311, the return air valve 333 is arranged on the return air main pipe 332, and the air inlet valve 335 is arranged at an inlet end of the air inlet pipe 334.
The dispensing bin 23 is also provided with a vibrator (not shown) outside, and the vibrator can drive the foaming balls in the dispensing bin 23 to vibrate along with the vibration of the vibrator, so that the foaming balls in the dispensing bin are prevented from bridging and uneven distribution.
The distributing plate 231 comprises a distributing plate 2311 and a regulating rod 2312 which is parallelly arranged on the distributing plate 2311 in a penetrating mode, two ends of the regulating rod 2312 are rotatably arranged on the side wall of the distributing bin 23, and the distributing plate 2311 is rotated through the rotating regulating rod 2312 to control the distribution conditions of the front side and the rear side and prevent uneven distribution.
A first handle 2322 is arranged at one end of the distribution plate 232, and a second handle 2342 is arranged at one end of the flow limiting plate 234; two mounting grooves (not shown) are formed in the distribution bin 23, one end of each mounting groove penetrates through the side wall of the distribution bin 23, the distribution plate 232 and the flow limiting plate 234 are detachably arranged in the mounting grooves, and the first handle 2322 and the second handle 2342 extend out of the side wall of the distribution bin 23; the first handle 2322 and the second handle 2342 are used for installing and replacing the distribution plate 232 and the restrictor plate 234, namely replacing the distribution plate 232 and the restrictor plate 234 with through holes with different diameters according to actual conditions;
each of the measuring chambers 233 includes a cylindrical upper portion and a conical lower portion which are vertically arranged, and an inlet diameter of the measuring chamber 233 is larger than an outlet diameter of the measuring chamber, and each of the measuring chambers 233 is used for receiving and storing a foaming ball.
Chamfers are arranged on the upper edge and the lower edge of the first through hole 2321 and the upper edge of the second through hole 2341, so that a foaming ball can smoothly enter the foaming ball; the diameter of the first through hole 2321 is 3-5mm, and the diameter of the second through hole 2341 is 3-4 mm.
The spray pipe 321 can rotate back and forth along the bearings 324 at both ends by a maximum angle of 15 ° (i.e., 15 ° for both ends). The angle between each foaming ball nozzle 323 and the perpendicular bisector L of the spray pipe 321 is-110 ° to +110 ° (i.e., the lowest part of the perpendicular bisector L is 0 °, counterclockwise is a positive angle, and clockwise is a negative angle). The length of each of the foaming ball nozzles 323 increases from bottom to top along the spray pipe 321. Namely, the position of each foaming ball in the dry fiberboard blank designed according to actual production requirements is adjusted, the forward and backward rotation angle of the spray pipe 321 along the bearings 324 at both ends, the included angle between each foaming ball nozzle 323 and the perpendicular line in the spray pipe 321, and the length of each foaming ball nozzle 323 are adjusted.
A fiber diversion cover 327 is disposed above the spraying pipe 321, and is used for diverting dry fibers falling from above the spraying pipe 321 to two sides of the spraying pipe 321.
The number of the foam ball nozzles is more than three, and the number of the first through holes 2321, the metering bin 233, the second through holes 2341, the blanking pipe 24, the pneumatic conveying hose 314, the foam ball accelerating pipe 322, the foam ball nozzles 323 and the long beam teeth 162 corresponds to the number of the foam ball nozzles 323.
The working process of the invention is as follows:
1. preparation for boot
The dry fiber board blank conveyer belt 15 runs, the paving harrow 17, the discharging conveyer belt 12 and the fiber scattering roller 13 (a plurality of rollers) wait for starting, and the dry fiber inlet of the fiber discharging bin 11 starts to discharge (namely, the fiber, and the fiber used for production is the dry fiber containing the fire retardant).
The cart 325 below the spray pipe 321 runs, and the spray pipe 321 containing a plurality of foam ball nozzles is placed below the discharge port of the paving bin 14 in preparation for spraying foam ball particles.
Foaming ball particle raw materials (the foaming ball particles are post-foaming flame-retardant polystyrene particles) are poured into a foaming ball bin 21, each pneumatic conveying hose 313 air volume adjusting valve 314 is opened, an air return valve 333 and an air inlet valve 335 of an air return collection assembly 33 are opened, a fan 311 is started, and an air return working state is established; the material distributing plate 231 is adjusted, and a distributing plate 232 and a flow limiting plate 234 which are matched with proper through hole diameters are selected. The vibrator is started, and the bottom edge of the discharge hole of the spiral discharging machine 22 is in sliding sealing connection with the feed hole of the distribution bin 23. The trolley 325 is slowly moved from side to side and the oscillator 326 is operated to rotate the spray pipe 321 slowly in the bearings 324 from front to back around a maximum angle of 15 ° back and forth. The leveler roller 16 equipment is turned on.
2. Starting up:
the paving harrow 17, the discharging conveyor belt 12 and the fiber scattering roller 13 are started to operate, the dry fiber inlet of the fiber discharging bin 11 starts to continuously discharge, and the discharging port of the fiber discharging bin 11 continuously discharges. The spiral discharging machine 22 operates, foaming ball raw materials fall from a discharging port of the spiral discharging machine 22, enter a distribution bin 23 of flame-retardant foaming balls, are adjusted and distributed through a distribution plate 231, then fall to a distribution plate 232, are evenly distributed into a plurality of metering bins 233 below through the distribution plate 232, are limited by a flow limiting plate 234 below, fall into a discharging pipe 24, are accelerated in a pneumatic conveying hose 313 and a foaming ball accelerating air pipe 322 under the condition that air sucked by an air return collecting assembly 33 is mixed with pressure air blown by an air box 312, and finally are blown out from an outlet of a foaming ball nozzle 323.
The fiber shunt cover 327 above the spray pipe 321 divides the continuous dry fiber blanking at the discharge port of the fiber blanking bin 11 into two partial fibers, and the fiber at the right outlet is the conventionally paved lower surface paving fiber; the fibers exiting on the left are conventional laid top surface laid fibers. The fire retardant foam beads are sprayed into the dry fiberboard blank over a large area at the angle of the foam bead nozzles 323 and finally take the shape shown in fig. 10 (the foam beads 100 are arranged in a continuous V-shape with different depths in the dry fiberboard blank 200). The distance h2 between the bottom foam ball 100 and the bottom of the dry fiber board blank 200 is greater than or equal to 20 mm. The foam ball 100 on the top of the dry fiber board blank 200 is 70mm or more from the highest point to the upper edge h1 on the top of the dry fiber board blank 200.
The foamed ball 100 is a post-foamed flame-retardant polystyrene particle ball, and is foamed in a hot press at high temperature and high pressure. The leveling roller 16 is used for raking off redundant dry fibers of the plate blank on the plate blank conveying belt 15, and the long beam teeth 162 correspond to the laying device of the flame-retardant foaming ball 100 and are used for raking off redundant wood fibers above the position of the foaming ball 100 to form a groove 201, as shown in fig. 10, the depth h3 of the groove 201 is 40-60mm, so that the fiber laying amount of the flame-retardant foaming ball particles in the vertical direction is smaller than that of two sides, the pressure is smaller, the vertical direction foaming is mainly guided during foaming in the press, and the groove 201 can be filled and leveled after the foaming expansion of the flame-retardant foaming ball particles, as shown in fig. 11.
The leveling rollers 16 are arranged in a left-right movement mode (not shown), the left-right movement distance is equal to the left-right movement distance of the foaming ball nozzles 323, and the time lag is a fixed time t, namely the distance between the spraying pipe and the leveling rollers/the speed of the slab conveying belt.
Since the trolley 325 moves slowly from side to side, the oscillator 326 works to make the spraying pipe 321 containing a plurality of foaming ball nozzles 323 swing slowly in the bearing 324 at an angle of 0-15 degrees from front to back, and simultaneously the wind power is adjusted, so that the flame-retardant foaming balls 100 can be continuously sprayed out from each foaming ball nozzle 323, and can be continuously sprayed out from each foaming ball nozzle 323 at different angles, different wind pressures and different positions to enter the dry fiber board blank 200. The return air collection chamber 3211 collects and sprays excess air from the air release holes 3233 of the respective foam ball nozzles 323, and passes through the return air collection pipe 331, the return main pipe 332, and the return valve 333, and enters the fan 311.
The paving slab paved with the post-foaming particles is conveyed to the production procedures of the subsequent prepressing, hot pressing and rough board treatment steps for treatment.
Stopping the machine: and stopping the spiral discharging machine 22 to stop discharging. And after the metering bin 233 finishes discharging, stopping the fiber discharging bin 11 to stop discharging, and closing the fan 311 after no material is sprayed at the outlet of the foaming ball nozzle 323. The wobbler 326 is then closed, the system stops and the dampers are closed again. After the dry fiberboard blank conveyor 15 is empty, the trolley 325 is operated to move the spray pipe 321 including the plurality of foam ball nozzles 323 out of the distribution bin 14. All systems are then shut down.
The invention has the following advantages:
1. the flame-retardant foaming ball spraying device can control the foaming balls to be sprayed to each section position of the section layer of the fiberboard, reduce the density of the board, realize that the foaming balls can be sprayed continuously in different angles in front and back and below, horizontal shooting, parabolic shooting, left-right moving sweeping, free falling, downward semicircular modes and the like, the positions of the foaming particles on the section of the board are not on the same straight line, the side nail-holding force of the board is enhanced, and meanwhile, the board is not easy to deform; and large-area irregular pits can not be generated on the plate, and the subsequent decoration and the attractiveness of the plate are not influenced.
2. The fiber layer density of the fiber board produced by the lightweight flame-retardant fiberboard produced by the invention under the same production process condition is balanced, the board is not easy to deform and can reach the physical and mechanical performance indexes such as the side nail holding force of the board, and the lightweight flame retardance meets the requirements of the national GB8624-2006 flame-retardant board grade B and C of the Standard regulation of building material and product burning performance grade. Namely, the performance requirement index used in a dry state in the standard of the lightweight fiberboard in the lightweight fiberboard industry under the density of 450-490 kilograms per cubic meter also meets the requirement that the lightweight flame retardance meets the national C-grade flame-retardant fire-proof plate.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.

Claims (9)

1. The utility model provides a fire-retardant foaming ball reposition of redundant personnel sprinkling system of fibreboard which characterized in that: the device comprises a flow dividing device and a spraying device, wherein the flow dividing device comprises a foaming ball bin, a spiral discharging machine, a distribution bin and a foaming ball discharging pipe, the spiral discharging machine is arranged at an outlet of the foaming ball bin, a discharging port of the spiral discharging machine is arranged above the distribution bin, and the foaming ball discharging pipe is connected with the lower part of the distribution bin;
a material distributing plate, a plurality of metering bins and a flow limiting plate are sequentially arranged in the distributing bin from top to bottom, first through holes are distributed in the distributing plate, and inlets of the metering bins are communicated with the corresponding first through holes; second through holes are distributed on the flow limiting plate, and the outlet of each metering bin is communicated with the corresponding second through hole; the lower end of each second through hole is communicated with the corresponding foaming ball blanking pipe;
the spraying device comprises a pneumatic conveying assembly, a spraying assembly and a return air collecting assembly, wherein the pneumatic conveying assembly comprises a fan, an air box, a pneumatic conveying hose and an air volume adjusting valve, the fan is connected with an air inlet of the air box, an air outlet of the air box is connected with a plurality of pneumatic conveying pipes, and each pneumatic conveying pipe is provided with the air volume adjusting valve; the middle part of each pneumatic conveying hose is connected with a foaming ball discharging pipe;
the spraying assembly comprises a spraying pipe, a plurality of foaming ball accelerating pipes and a plurality of foaming ball nozzles, each foaming ball accelerating pipe is arranged in the spraying pipe, and a space formed between the inner wall and the outer wall of the spraying pipe is a return air collecting chamber; one end of each foaming ball accelerating tube is respectively connected with a corresponding pneumatic conveying hose, each foaming ball nozzle is arranged on the spraying tube in a penetrating way, the inlet of each foaming ball nozzle is connected with the corresponding foaming ball accelerating tube, and the outlet of each foaming ball nozzle extends to the outer side of the spraying tube; and a plurality of air-breathing holes are distributed on the pipe wall of each foaming ball nozzle; two ends of the spraying pipe are sleeved with bearings, and the two bearings are fixed on the trolley;
the return air collecting assembly comprises a return air collecting pipe, a return air main pipe, a return air valve, an air inlet pipe and an air inlet valve, the return air collecting pipe is communicated with a return air collecting chamber, the other end of the return air collecting pipe is connected to the return air main pipe, the return air main pipe is connected to the middle of the air inlet pipe, one end of an outlet of the air inlet pipe is connected with a fan, the return air valve is arranged on the return air main pipe, and the air inlet valve is arranged at the inlet end of the air inlet pipe.
2. The fire retardant foam ball diversion sprinkler system of fiberboard of claim 1, wherein: and a vibrator is also arranged outside the distribution bin.
3. The fire retardant foam ball diversion sprinkler system of fiberboard of claim 1, wherein: one end of the distribution plate is provided with a first handle, and one end of the flow limiting plate is provided with a second handle; the distribution bin is internally provided with two mounting grooves, one end of each mounting groove penetrates through the side wall of the distribution bin, the distribution plate and the flow limiting plate are detachably arranged in the mounting grooves, and the first handle and the second handle extend out of the side wall of the distribution bin.
4. The fire retardant foam ball diversion sprinkler system of fiberboard of claim 1, wherein: each metering bin comprises a cylindrical upper part and a conical lower part which are arranged up and down, and the diameter of an inlet of each metering bin is larger than that of an outlet of each metering bin.
5. The fire retardant foam ball diversion sprinkler system of fiberboard of claim 1, wherein: and chamfers are arranged on the upper edge and the lower edge of the first through hole and the upper edge of the second through hole.
6. The fire retardant foam ball diversion sprinkler system of fiberboard of claim 1, wherein: the diameter of the first through hole is 3-5mm, and the diameter of the second through hole is 3-4 mm.
7. The fire retardant foam ball diversion sprinkler system of fiberboard of claim 1, wherein: the maximum angle at which the spray tube can rotate back and forth along the bearings at both ends is 15 °.
8. The fire retardant foam ball diversion sprinkler system of fiberboard of claim 1, wherein: the included angle between each foaming ball nozzle and the perpendicular bisector of the spraying pipe is-110 degrees to +110 degrees.
9. The fire retardant foam ball diversion sprinkler system of fiberboard of claim 1, wherein: the length of each foaming ball nozzle is increased along the spraying pipe from bottom to top in sequence.
CN202010826852.1A 2020-08-17 2020-08-17 Fire-retardant foaming ball reposition of redundant personnel sprinkling system of fibreboard Pending CN112076902A (en)

Priority Applications (1)

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CN202010826852.1A CN112076902A (en) 2020-08-17 2020-08-17 Fire-retardant foaming ball reposition of redundant personnel sprinkling system of fibreboard

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Application Number Priority Date Filing Date Title
CN202010826852.1A CN112076902A (en) 2020-08-17 2020-08-17 Fire-retardant foaming ball reposition of redundant personnel sprinkling system of fibreboard

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CN112076902A true CN112076902A (en) 2020-12-15

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