Flame-retardant material adding device used in gypsum-based flame-retardant plate production

Abstract

The invention relates to the technical field of gypsum-based flame-retardant plates, and discloses a flame-retardant material adding device during gypsum-based flame-retardant plate production, which comprises a mounting plate fixed above a gypsum-based flame-retardant plate reaction kettle, and an obliquely arranged conveying cylinder is fixedly mounted above the mounting plate; a hollow transmission shaft is rotatably mounted in the conveying cylinder, a conveying auger fixedly sleeves the hollow transmission shaft, the bottom end of the hollow transmission shaft rotatably penetrates out of the bottom end of the conveying cylinder, a driving motor is further fixedly mounted on the mounting plate, and an output shaft of the driving motor is fixedly connected with the hollow transmission shaft; the mode of heating the conveying auger has the advantages that the contact area with powder is large, heating of the powder in the conveying process is equivalent to stirring of the heated powder, heating is more uniform, and therefore the problem that in the background technology, aluminum hydroxide powder is prone to being affected with damp is better solved.

Description

Technical Field

[0001] The invention relates to the technical field of gypsum-based flame-retardant boards, in particular to a flame-retardant material adding device during the production of gypsum-based flame-retardant boards. Background Art

[0002] Gypsum-based flame retardant board is a building board with gypsum as the main raw material. It has good flame retardant properties because the gypsum itself is non-flammable and the crystal water released at high temperature can play a cooling and flame retardant role. The flame retardants used in the production of gypsum-based flame retardant boards mainly include inorganic flame retardants (such as metal hydroxides, metal oxides, metal silicates), organic flame retardants (such as phosphorus-based, nitrogen-based, halogen-based flame retardants) and composite flame retardants (such as phosphorus-nitrogen-based composites, inorganic-organic composite flame retardants). Flame retardants are commonly used aluminum hydroxide powder, which is usually added through a flame retardant adding device. The flame retardant adding device in the production of gypsum-based flame retardant boards is a device used to accurately and evenly add flame retardants to the raw materials for the production of gypsum-based flame retardant boards.

[0003] For example, the utility model patent with announcement number CN 214242964 U discloses that the utility model discloses a flame retardant adding device, including a feeding pipe and a discharge box, the top of the feeding pipe is connected with a conveying pipe, the bottom of the right end of the conveying pipe is fixedly connected with a support plate, the bottom of the support plate is fixedly connected with a support rod, the top of the support plate is fixedly connected with a driving motor, the output end of the driving motor is connected with a reducer, the output end of the reducer is connected with a conveying screw through a coupling, the bottom of the discharge box is connected with the top of the conveying pipe, and a variable frequency rotary unloading valve is arranged between the bottom of the discharge box and the top of the conveying pipe. The utility model can realize automatic feeding and improve work efficiency through the cooperation between the driving motor and the conveying screw, and the discharge box can be divided into two layers by cooperating with the dividing device, the lower layer is the discharge layer, and the upper layer is the storage layer, which is convenient for controlling the discharge of the discharge hopper and effectively improving the controllability of the discharge device.

[0004] However, when the above device stores aluminum hydroxide powder, the aluminum hydroxide powder has a certain hygroscopicity, and the hydroxyl groups on its surface can absorb water molecules. After a small amount of dissolution in a humid environment, the ions precipitated will also adhere to the particles, so it is easy to get damp and agglomerate. Summary of the invention

[0005] The present application aims to provide a flame retardant material adding device during the production of gypsum-based flame retardant boards to improve the technical problem that the flame retardant material (aluminum hydroxide powder) is easily affected by moisture and agglomerated.

[0006] The embodiment of the present invention provides a flame retardant fuel adding device during the production of gypsum-based flame retardant boards, comprising a mounting plate fixed above a reactor of gypsum-based flame retardant boards, a conveying cylinder arranged obliquely fixedly mounted above the mounting plate, a hollow transmission shaft rotatably mounted in the conveying cylinder, a conveying auger fixedly sleeved on the hollow transmission shaft, the bottom end of the hollow transmission shaft rotatably penetrates the bottom end of the conveying cylinder, a driving motor is also fixedly mounted on the mounting plate, the output shaft of the driving motor is fixedly connected to the hollow transmission shaft, a plurality of openings communicating with the inner cavity of the hollow transmission shaft are axially opened on the penetration end of the hollow transmission shaft, a ventilation sleeve is rotatably and sealably mounted on the hollow transmission shaft at the opening position, the ventilation sleeve is communicated with the output port of an external hot gas supply device through a conveying pipe, a hollow turntable is fixedly sleeved on the top end of the hollow transmission shaft, the hollow turntable is a hollow structure, and its inner cavity is communicated with the inner cavity of the hollow transmission shaft, the hollow turntable is sealed and rotatably connected to the inner wall of the conveying cylinder, and a feed hopper is fixedly connected to the top end of the conveying cylinder.

[0007] Preferably, the hollow turntable is sealed and rotatably connected to the inner wall of the conveying tube via an engaging structure 1, and a cavity for discharging gas to the outside of the conveying tube is formed in the engaging structure 1.

[0008] Preferably, the hollow transmission shaft is sealingly rotatably connected to the ventilation sleeve at the opening position through a second bite structure.

[0009] Preferably, a hollow interlayer is provided in the conveying auger, and the hollow interlayer is connected to the inner cavity of the hollow transmission shaft.

[0010] Preferably, a hollow mounting plate is fixedly mounted on the top of the feed hopper;

[0011] The top end of the hollow transmission shaft is connected to a solid transmission shaft via a universal coupling, and a stirring structure is provided on the top fixed sleeve of the solid transmission shaft.

[0012] Preferably, the solid transmission shaft is provided with a mesh plate 1 which can rotate synchronously with the solid transmission shaft;

[0013] A mesh plate 2 is fixedly installed in the feed hopper, and a gap exists between the mesh plates 1 and 2.

[0014] Preferably, the solid transmission shaft is provided with a plurality of limiting protrusions, and the mesh plate 1 is provided with sliding holes for nesting the solid transmission shaft and matching the shapes of the limiting protrusions, so as to be axially slidably sleeved on the solid transmission shaft;

[0015] The side of the mesh plate 1 is provided with two sliding blocks mirror-symmetrically, and the feed hopper is provided with a cam groove for slidingly embedding the two sliding blocks and making the mesh plate 1 slide back and forth axially.

[0016] Preferably, the bottom end of the gypsum-based flame-retardant board reactor is provided with supporting legs.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] Compared with the method of directly heating the inner wall of the silo, the advantage of the present invention of heating the conveying auger is that the contact area with the powder is large, and heating the powder during transportation is equivalent to stirring the heated powder, making the heating more uniform, thereby better solving the problem of aluminum hydroxide powder being easily affected by moisture in the aforementioned background technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the conveying cylinder and the feed hopper of the present invention;

[0022] Figure 3 for Figure 2 A partial enlarged view of middle A;

[0023] Figure 4 for Figure 2 A partial enlarged view of B.

[0024] In the figure:

[0025] 1. Gypsum-based flame-retardant board reactor; 2. Mounting plate; 3. Conveying cylinder; 4. Hollow transmission shaft; 5. Conveying auger; 6. Driving motor; 7. Opening; 8. Ventilation sleeve; 9. Hot air supply equipment; 10. Hollow turntable; 11. Feed hopper; 12. Interlocking structure one; 13. Cavity; 14. Interlocking structure two; 15. Hollow interlayer; 16. Hollow mounting plate; 17. Universal coupling; 18. Solid transmission shaft; 19. Stirring structure; 20. Mesh plate one; 21. Mesh plate two; 22. Limiting protrusion; 23. Sliding block; 24. Cam slide; 25. Leg; 26. Conveying pipe. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0028] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figures 1 to 4As shown, the present invention provides a flame retardant fuel adding device for the production of gypsum-based flame retardant boards, comprising a mounting plate 2 fixed above a gypsum-based flame retardant board reactor 1, a conveying cylinder 3 arranged obliquely is fixedly installed above the mounting plate 2, a hollow transmission shaft 4 is rotatably installed in the conveying cylinder 3, a conveying auger 5 is fixedly sleeved on the hollow transmission shaft 4, the bottom end of the hollow transmission shaft 4 rotates and passes through the bottom end of the conveying cylinder 3, a driving motor 6 is also fixedly installed on the mounting plate 2, and the output shaft of the driving motor 6 is fixedly connected to the hollow transmission shaft 4, and the hollow transmission shaft 4 is hollow. A plurality of openings 7 connected to the inner cavity of the hollow transmission shaft 4 are axially provided on the through end of the core transmission shaft 4. The hollow transmission shaft 4 is rotatably and sealably installed with a ventilation sleeve 8 at the position of the opening 7. The ventilation sleeve 8 is connected to the output port of the external hot gas supply device 9 through the delivery pipe 26. The top of the hollow transmission shaft 4 is fixedly provided with a hollow turntable 10. The hollow turntable 10 is a hollow structure whose inner cavity is connected to the inner cavity of the hollow transmission shaft 4. The hollow turntable 10 is sealed and rotatably connected to the inner wall of the conveying cylinder 3. The top of the conveying cylinder 3 is fixedly connected with a feed hopper 11. The hollow transmission shaft 4 is sealed and rotatably connected to the ventilation sleeve 8 through a bite structure 2 14 at the position of the opening 7. A hollow interlayer 15 is provided in the conveying auger 5, and the hollow interlayer 15 is connected to the inner cavity of the hollow transmission shaft 4. The hollow turntable 10 is sealed and rotatably connected to the inner wall of the conveying cylinder 3 through a bite structure 1 12. A cavity 13 for discharging gas to the outside of the conveying cylinder 3 is formed in the bite structure 1 12.

[0032] Working principle of the present invention:

[0033] When the flame retardant fuel adding device normally adds flame retardant (aluminum hydroxide powder) to the gypsum-based flame retardant board reactor 1, the aluminum hydroxide powder is first loaded into the feed hopper 11, and the aluminum hydroxide powder in the feed hopper 11 slides to the top of the conveying cylinder 3 under the action of gravity, and the drive motor 6 is turned on. The drive motor 6 drives the hollow transmission shaft 4 to rotate, and the hollow transmission shaft 4 will drive the conveying auger 5 fixedly connected thereto to rotate synchronously. The rotation of the conveying auger 5 will drive the aluminum hydroxide powder entering the conveying cylinder 3 to move toward its bottom end. At this time, a plurality of protrusions are arranged on the conveying auger 5, so that some loose lumps can be broken up by the rotation of the conveying auger 5 and the friction with the aluminum hydroxide powder.

[0034] When it is necessary to dry the flame retardant (aluminum hydroxide powder) in the feed hopper 11, turn on the external hot air supply device 9 (generally composed of a heating wire and a blower), and the hot air supply device 9 passes the hot air into the ventilation sleeve 8 through the conveying pipe 26. Since the upper and lower ends of the ventilation sleeve 8 are sealed and rotatably connected with the ventilation sleeve 8 through the bite structure 14, a sealed annular space is formed in the middle of the ventilation sleeve 8, and the hot air enters the annular space. The opening 7 of the hollow transmission shaft 4 is directly connected to the annular space and is connected to it. Then, the hot air can freely enter the hollow transmission shaft 4 through the opening 7 to heat the hollow transmission shaft 4. Since the hollow interlayer 15 is connected to the hollow transmission shaft 4 The inner cavity is connected, so the hot air entering the inner cavity of the hollow transmission shaft 4 enters the hollow interlayer 15, thereby heating the entire conveying auger 5. The hot air gradually heats the conveying auger 5 from bottom to top until it enters the inner cavity of the hollow turntable 10 from the top of the conveying auger 5. The hot air entering the hollow turntable 10 passes through its own internal channel and enters the cavity 13 (the principle of the bite structure 12 is similar to that of the bite structure 2 14). Since the bite structure 12 separates the cavity 13 from the conveying tube 3 and will not affect its internal sealing, exhaust holes are provided at the corresponding positions of the conveying tube 3 and the cavity 13 to allow the hot air to be discharged, thereby completing the heating process of the conveying auger 5.

[0035] Compared with the method of directly heating the inner wall of the silo, the advantage of the method of heating the conveying auger 5 in the present invention is that the contact area with the powder is large, and heating the powder during transportation is equivalent to stirring the heated powder, making the heating more uniform, thereby better solving the problem of aluminum hydroxide powder being easily affected by moisture in the aforementioned background technology.

[0036] When the effect of the convex points provided on the conveying auger 5 in breaking up the agglomerates is not thorough or the efficiency is too low, the following settings are also made in other embodiments of the present invention:

[0037] A hollow mounting plate 16 is fixedly installed at the top of the feed hopper 11; a solid transmission shaft 18 is connected to the top of the hollow transmission shaft 4 through a universal coupling 17, and a stirring structure 19 is fixedly sleeved at the top of the solid transmission shaft 18. A mesh plate 20 that can rotate synchronously with the solid transmission shaft 18 is arranged on the solid transmission shaft 18; a mesh plate 21 is fixedly installed in the feed hopper 11, and there is a gap between the mesh plates 1 20 and the mesh plates 1 20. A plurality of limiting protrusions 22 are arranged on the solid transmission shaft 18, and the mesh plate 1 20 is provided with sliding holes for nesting the solid transmission shaft 18 and matching the shape of the limiting protrusions 22, so as to be axially slidably sleeved on the solid transmission shaft 18; two sliders 23 are mirror-symmetrically arranged on the side of the mesh plate 1 20, and a cam slide 24 is provided on the feed hopper 11 for slidingly embedding the two sliders 23 and making the mesh plate 1 20 axially reciprocatingly slide. A support leg 25 is provided at the bottom end of the gypsum-based flame-retardant board reactor 1 .

[0038] How this part works:

[0039] The top end of the hollow transmission shaft 4 can synchronously drive the solid transmission shaft 18 through the universal coupling 17. It should be noted that the universal coupling 17 is the prior art that can transmit power between two staggered shafts, but the angle between the two shafts should be between 145 degrees and 180 degrees, so that the solid transmission shaft 18 can rotate synchronously with the hollow transmission shaft 4. At this time, the solid transmission shaft 18 is restricted to rotate at the axis of the feed hopper 11 through the hollow mounting plate 16, thereby driving the stirring structure 19 fixedly connected thereto to rotate synchronously, so that the stirring structure 19 can also be used as a tool to break up lumps, and accelerate the flow of powder to avoid lumps.

[0040] Furthermore, in order to prevent the limited breaking capacity of the stirring structure 19, the invention further provides a mesh plate 20. When the solid transmission shaft 18 rotates, the mesh plate 20 can be driven to rotate synchronously, and the mesh plate 21 is fixed on the feed hopper. 11 On the inner wall, the mesh holes of mesh plate 21 are larger than the mesh holes of mesh plate 1 20, some lumps will fall between mesh plate 21 and mesh plate 1 20, while mesh plate 21 is fixed and mesh plate 1 20 rotates, and the relative rotation between the two will generate a certain shear force on the lumps, thereby breaking up the lumps, and when mesh plate 1 20 rotates, the two sliders 23 around it also slide in the cam groove 24, and the overall direction of the cam groove 24 is similar to a ring surrounded by wavy lines, and the two sliders 23 sliding along it will produce longitudinal displacement (its principle is similar to the cam structure in the prior art), which is equivalent to the periodic change of the interval between mesh plate 1 21 and mesh plate 1 20, so that the lumps between the two can be squeezed and crushed.

[0041] The hollow mounting plate 16 and the hollow rotating plate 10 are similar in shape, and both are provided with openings for powder to pass through.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flame retardant material adding device for producing gypsum-based flame retardant boards, comprising a mounting plate (2) fixed above a gypsum-based flame retardant board reactor (1), characterized in that: A conveying cylinder (3) arranged obliquely is fixedly mounted above the mounting plate (2), a hollow transmission shaft (4) is rotatably mounted in the conveying cylinder (3), a conveying auger (5) is fixedly sleeved on the hollow transmission shaft (4), the bottom end of the hollow transmission shaft (4) rotatably penetrates the bottom end of the conveying cylinder (3), a driving motor (6) is also fixedly mounted on the mounting plate (2), the output shaft of the driving motor (6) is fixedly connected to the hollow transmission shaft (4), and a plurality of openings communicating with the inner cavity of the hollow transmission shaft (4) are axially opened on the through end of the hollow transmission shaft (4) (7), the hollow transmission shaft (4) is rotatably and sealably mounted with a ventilation sleeve (8) at the position of the opening (7), the ventilation sleeve (8) is connected to the output port of the external hot air supply device (9) through a delivery pipe (26), the top fixed sleeve of the hollow transmission shaft (4) is provided with a hollow turntable (10), the hollow turntable (10) is a hollow structure, the inner cavity of which is connected to the inner cavity of the hollow transmission shaft (4), the hollow turntable (10) is rotatably and sealably connected to the inner wall of the delivery cylinder (3), and the top of the delivery cylinder (3) is fixedly connected with a feed hopper (11).

2. The flame retardant material adding device for producing gypsum-based flame retardant boards according to claim 1, characterized in that: The hollow turntable (10) is connected to the inner wall of the conveying tube (3) in a sealed and rotatable manner via a bite structure (12), and a cavity (13) is formed in the bite structure (12) for discharging gas to the outside of the conveying tube (3).

3. The flame retardant material adding device for producing gypsum-based flame retardant board according to claim 1, characterized in that: The hollow transmission shaft (4) is sealingly rotatably connected to the ventilation sleeve (8) at the position of the opening (7) via a second bite structure (14).

4. The flame retardant material adding device for producing gypsum-based flame retardant boards according to claim 1, characterized in that: A hollow interlayer (15) is provided inside the conveying auger (5), and the hollow interlayer (15) is connected to the inner cavity of the hollow transmission shaft (4).

5. The flame retardant material adding device for producing gypsum-based flame retardant board according to claim 1, characterized in that: A hollow mounting plate (16) is fixedly mounted on the top of the feed hopper (11); The top end of the hollow transmission shaft (4) is transmission-connected to a solid transmission shaft (18) via a universal coupling (17), and a stirring structure (19) is fixedly sleeved on the top end of the solid transmission shaft (18).

6. The flame retardant material adding device for producing gypsum-based flame retardant boards according to claim 5, characterized in that: The solid transmission shaft (18) is provided with a mesh plate (20) capable of rotating synchronously with the solid transmission shaft (18); A mesh plate 2 (21) is fixedly installed in the feed hopper (11), and a gap exists between the mesh plate 1 (20) and the mesh plate 1 (20).

7. The flame retardant material adding device for producing gypsum-based flame retardant boards according to claim 6, characterized in that: The solid transmission shaft (18) is provided with a plurality of limiting protrusions (22), and the mesh plate (20) is provided with a sliding hole for nesting the solid transmission shaft (18) and matching the shape of the limiting protrusions (22), so as to be axially slidably sleeved on the solid transmission shaft (18); Two sliding blocks (23) are mirror-symmetrically arranged on the side of the mesh plate 1 (20), and a cam groove (24) is provided on the feed hopper (11) for slidingly embedding the two sliding blocks (23) and allowing the mesh plate 1 (20) to slide back and forth axially.

8. The flame retardant material adding device for producing gypsum-based flame retardant boards according to claim 7, characterized in that: The bottom end of the gypsum-based flame-retardant board reaction kettle (1) is provided with supporting legs (25).

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