PP flame-retardant plate drying equipment

Abstract

The invention relates to the technical field of drying equipment, in particular to PP flame-retardant plate drying equipment which comprises a machine shell, a feeding port and a discharging port are formed in the machine shell, a plurality of driving rollers are horizontally arranged in the machine shell, and a heating device used for heating and drying PP flame-retardant plates is arranged in the machine shell; a first sponge roller and a second sponge roller are rotationally arranged on the side, close to the feeding opening, in the machine shell, and a first motor and a second motor are installed on the machine shell; a first extrusion part and a second extrusion part are arranged in the machine shell; a first collecting groove and a second collecting groove are further formed in the machine shell. According to the PP flame-retardant plate drying device, the upper surface and the lower surface of a PP flame-retardant plate are scrubbed in a rolling mode through the first sponge roller and the second sponge roller, liquid on the surface of the PP flame-retardant plate is adsorbed as much as possible, then the surface of the PP flame-retardant plate is dried through the heating device, the drying effect of the PP flame-retardant plate is guaranteed, and the drying efficiency of the PP flame-retardant plate can be improved.

Description

Technical Field

[0001] This invention relates to the field of drying equipment technology, specifically to a PP flame-retardant board drying equipment. Background Technology

[0002] PP flame-retardant boards are a type of plastic sheet used for heat insulation and fireproofing. The production process requires cleaning and drying. Currently, there are generally two methods for drying PP flame-retardant boards during production. One method uses a separate drying unit. After production, the PP flame-retardant boards are placed in a drying room or a closed drying unit, manually stacked, and then the drying unit is activated to dry the surface. The other method uses a non-closed assembly line drying system. The drying equipment is connected to a conveyor belt. After production on the assembly line, the boards are transported by the conveyor belt to a cleaning area for washing. After washing, the boards are transported by the conveyor belt to the drying unit, where they pass through the drying unit and are then collected in a designated collection area. During the drying process, the PP flame-retardant boards are dried.

[0003] Both of the above methods can dry PP flame-retardant boards. However, using separate drying equipment to dry PP flame-retardant boards requires manual handling and neat stacking, which is very troublesome, not conducive to continuous production, and results in low production efficiency. Furthermore, if the PP flame-retardant boards are not stacked properly, some of them may not be completely dried, affecting the drying effect.

[0004] While assembly line drying equipment offers better continuity compared to standalone drying equipment, and the PP flame-retardant boards are sequentially conveyed into the drying equipment via a conveyor belt without stacking, resulting in a more uniform drying effect, there is a significant drawback: the drying effect of existing assembly line drying equipment is inversely proportional to production efficiency. That is, the faster the conveyor belt speed, the worse the drying effect of the PP flame-retardant boards. Therefore, ensuring the drying effect of the PP flame-retardant boards necessitates reducing the conveyor speed.

[0005] To address this, a PP flame-retardant board drying device is proposed, which improves the drying efficiency of conveyor belt drying equipment for PP flame-retardant boards while ensuring the drying effect of PP flame-retardant boards. Summary of the Invention

[0006] The purpose of this invention is to provide a PP flame-retardant board drying device to resolve the contradiction between the drying effect and drying efficiency of PP flame-retardant boards mentioned in the background art, thereby ensuring both the drying effect and the drying efficiency of PP flame-retardant boards.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A PP flame-retardant board drying device includes a casing. A feed inlet is located on one side of the casing, and a discharge outlet is located on the opposite side. Multiple drive rollers for moving the PP flame-retardant board are horizontally arranged inside the casing. A heating device for heating and drying the PP flame-retardant board is also located inside the casing. A first sponge roller is rotatably arranged inside the casing near the feed inlet, located below the feed inlet. A second sponge roller is rotatably arranged inside the casing, located above the feed inlet, and vertically opposite to the first sponge roller. A first motor for driving the first sponge roller and a second motor for driving the second sponge roller are mounted on the casing. A first extrusion section for extruding the first sponge roller and a second extrusion section for extruding the second sponge roller are also provided inside the casing. A first collection tank and a second collection tank are also provided inside the casing, respectively for collecting the liquid extruded by the first and second sponge rollers.

[0009] The drive roller is used to transport the PP flame-retardant board inside the machine housing. After the PP flame-retardant board is cleaned, it is conveyed into the machine housing through the feed inlet. Once inside, the board is first squeezed and contacted by the first and second sponge rollers, and then continuously transported towards the discharge outlet by the drive roller. After the first and second sponge rollers contact the upper and lower surfaces of the PP flame-retardant board, the residual cleaning liquid on the board is absorbed by the sponges on the rollers through capillary action, thus removing most of the moisture from the board. This facilitates subsequent drying by the heating device, improving the drying efficiency of the PP flame-retardant board while ensuring effective drying.

[0010] Meanwhile, the first and second extrusion sections inside the casing can squeeze the first and second sponge rollers to expel the cleaning liquid they have absorbed when the first and second sponge rollers rotate, and collect it in the first and second collection tanks. This prevents the first and second sponge rollers from becoming saturated and unable to continue adsorbing and drying the residual cleaning liquid on the surface of the PP flame-retardant board, further ensuring the drying effect of the PP flame-retardant board.

[0011] Preferably, the first extrusion section consists of two vertical plates vertically installed on the left and right sides of the first sponge roller, the distance between the two vertical plates being less than the diameter of the sponge roller in its natural state, and the first collection groove is installed below the first sponge roller; the second sponge roller includes a sponge layer and a hollow sleeve, the sponge layer being fixedly installed on the hollow sleeve, and multiple rows of through holes being evenly opened on the side wall of the hollow sleeve; the second collection groove is cylindrical and the outer diameter of the second collection groove is the same as the inner diameter of the hollow sleeve, the second collection groove is fixedly installed inside the machine housing, and a collection port is opened at the top of the second collection groove, and the hollow sleeve is rotatably installed on the collection groove; the second extrusion section is an arc-shaped surface disposed above the second sponge roller, and the distance from the highest point of the arc-shaped surface to the center of the second sponge roller is less than the radius of the second sponge roller.

[0012] The two vertical plates of the first extrusion section limit the two sides of the first sponge roller. Whenever the first sponge roller rotates to contact the two vertical plates of the first extrusion section, the sponge on the first sponge roller will contract due to the compression of the two vertical plates, thereby squeezing out the cleaning liquid adsorbed on the first sponge roller. Finally, the cleaning liquid squeezed out by the first sponge roller falls into the first collection tank below for collection. The second collection tank is set into a cylindrical shape with a collection port at its top. The second collection tank is then fixed inside the machine housing with the collection port facing upward. Multiple rows of through holes are made on the hollow sleeve of the second sponge roller. The hollow sleeve is then rotated and fitted onto the second collection tank. The second extrusion section is set above the second sponge roller. When the second sponge roller rotates, the top of the second sponge roller will press and contact the second extrusion section. The cleaning liquid adsorbed inside the squeezed second sponge roller will gather and flow downward under the action of gravity, eventually flowing to the outer wall of the hollow sleeve. Because multiple rows of through holes are made on the hollow sleeve, the cleaning liquid can pass through the hollow sleeve and enter the second collection tank for collection. To prevent the second sponge roller from becoming saturated and unable to absorb the cleaning liquid from the surface of the PP flame-retardant board, the second collection tank is used as the central axis of the second sponge roller. This prevents the squeezed-out cleaning liquid from dripping back onto the PP flame-retardant board surface, further ensuring the drying effect and efficiency.

[0013] Preferably, the machine housing is provided with a barrier part that separates the first sponge roller and the second sponge roller from the discharge port. The barrier part, together with the outer wall of the machine housing, forms a heating chamber on the side of the machine housing near the discharge port. The barrier part is provided with an opening for the PP flame-retardant board to pass through. The heating device is installed inside the heating chamber.

[0014] The barrier section separates the heating chamber from the first and second sponge rollers, concentrating the heat required for drying inside the heating chamber. This reduces the amount of heat dissipated to the first and second sponge rollers, which would otherwise be used to dry the PP flame-retardant board without wiping it. This also reduces heat loss. At the same time, because the heat is concentrated inside the heating chamber, the drying effect and efficiency are also effectively improved.

[0015] Preferably, a blowing section is provided above the opening of the barrier section. The width of the air outlet of the blowing section is the same as the width of the feed inlet. The blowing section is inclined from top to bottom towards the feed inlet, and the air outlet of the blowing section is positioned towards the lowest point of the second sponge roller.

[0016] The air blown out by the blower forms an air curtain. After the PP flame-retardant board enters the machine casing, the upper surface of the second sponge roller contacts the upper surface of the PP flame-retardant board and absorbs most of the residual cleaning liquid, but some residue will still remain. When the air curtain contacts the upper surface of the PP flame-retardant board, it gathers the remaining cleaning liquid after the second sponge roller's absorption and blows it to the contact point between the second and first sponge rollers. The rotation of the second sponge roller further absorbs this gathered residual cleaning liquid, further reducing the amount of cleaning liquid remaining on the PP flame-retardant board that enters the heating chamber with it. This ensures the PP flame-retardant board is completely dried inside the heating chamber, reducing the drying time and improving the drying efficiency. The blower only acts on the upper surface of the PP flame-retardant board because the residual cleaning liquid on the lower surface will drip naturally under gravity, while the residual cleaning liquid on the upper surface is less likely to drip downwards, resulting in less residual cleaning liquid on the lower surface than on the upper surface.

[0017] Preferably, the top of the heating chamber has an arc-shaped portion that slopes downwards. The arc-shaped portion is connected to a barrier portion, and a guide groove is provided on the barrier portion. The guide groove passes through the barrier portion and is inclined downwards towards the second sponge roller along the tangent direction of the arc-shaped portion. A guide plate is provided below the outlet of the guide groove on the side near the second sponge roller, and the suspended end of the guide plate contacts the second sponge roller. A water outlet is provided at the bottom of the heating chamber and is connected to the first collection tank.

[0018] As the PP flame-retardant board is continuously heated and dried inside the heating chamber, residual moisture will remain. This moisture rises and collects as water droplets on the top of the chamber. To prevent these droplets from dripping back onto the PP flame-retardant board as it passes through the heating chamber, and to ensure complete drying, an arc-shaped section is incorporated at the top of the heating chamber to guide the collected water droplets. A guide channel is also provided on the barrier section. Under the influence of gravity and the arc-shaped section, the water droplets are guided into the guide channel, and then, through the channel and guide plate, come into contact with the second sponge roller. The water droplets are then absorbed by the second sponge roller and finally squeezed into the second collection tank. This further improves the drying effect of the heating chamber, reduces moisture inside, and thus enhances the drying efficiency and effectiveness of the PP flame-retardant board.

[0019] The water outlet at the bottom of the heating chamber is also to prevent liquid from accumulating at the bottom of the heating chamber and affecting the drying effect of the heating chamber on the PP flame-retardant board.

[0020] Preferably, an arc-shaped plate is provided below the horizontal line of the feed inlet in the heating chamber, and the arc-shaped plate is inclined from bottom to top with the end near the discharge outlet as the lowest point; the heating device includes a first hot air outlet and a second hot air outlet for blowing out hot air, the first hot air outlet is arranged from bottom to top towards the arc-shaped part, and the second hot air outlet is arranged from top to bottom towards the arc-shaped plate.

[0021] The first and second hot air inlets can directly blow air onto the top and bottom surfaces of the PP flame-retardant board as it passes through, drying the surface. However, they can only blow air from a fixed location. To ensure the PP flame-retardant board is dried by the hot air from the first and second hot air inlets as soon as it enters the heating chamber, the first hot air inlet is positioned towards the top arc-shaped section. Under the guiding effect of the arc-shaped section, the PP flame-retardant board is directly dried by the hot air from the first hot air inlet as soon as it enters the heating chamber. When the PP flame-retardant board is conveyed above the first hot air inlet and blocks the airflow from the arc-shaped section, the bottom of the PP flame-retardant board is then directly dried by the hot air from the first hot air inlet. The same applies to the second hot air inlet when it is not blocked by the PP flame-retardant board. When the second hot air vent is not blocked by the PP flame-retardant sheet, the hot air is guided to the bottom of the PP flame-retardant sheet by the curved plate. After the second hot air vent is blocked by the PP flame-retardant sheet, the hot air blown out from the second hot air vent will directly contact the upper surface of the PP flame-retardant sheet for drying. In this way, the PP flame-retardant sheet will have two points of direct contact with hot air for drying when it enters the heating chamber, which further ensures the drying effect of the PP flame-retardant sheet and also saves the drying time required for the PP flame-retardant sheet.

[0022] In addition, the direct airflow from the first hot air inlet to the arc-shaped section helps the water vapor gathered at the top of the heating chamber to quickly condense into water droplets and flow into the guide channel along the arc-shaped section, thereby accelerating the discharge of water vapor from the heating chamber.

[0023] Meanwhile, in order to avoid interference between the air blown out of the first hot air outlet and the air blown out of the second hot air outlet, multiple first and second air outlets can be set up and arranged in a cross manner.

[0024] Preferably, a first swing plate for closing the discharge port is rotatably installed at the discharge port. The first swing plate can swing open the discharge port along the forward direction of the PP flame-retardant board. A second swing plate for closing the through port is rotatably installed at the through port. The second swing plate can swing open the through port along the forward direction of the PP flame-retardant board. When the drive roller moves the PP flame-retardant board, after the PP flame-retardant board contacts the first and second swing plates, it can push the first and second swing plates open respectively, thereby automatically opening the discharge port and the through port. The first and second swing plates will not affect the PP flame-retardant board entering the heating chamber. The arrangement of the first and second swing plates respectively closes the discharge port and the through port, reducing the channel between the heating chamber and the external environment, thereby reducing heat loss and saving energy. At the same time, keeping the heat inside the heating chamber helps to improve the drying effect and drying efficiency of the PP flame-retardant board.

[0025] Preferably, the side of the first oscillating plate facing the heating chamber is provided with a soft absorbent material. The absorbent material can be an absorbent sponge, absorbent cotton cloth, or other soft absorbent materials. When the PP flame-retardant board is pushed open from the discharge port by the drive roller, the soft absorbent material on the first oscillating plate will come into contact with the upper surface of the PP flame-retardant board after the first oscillating plate is pushed open, further drying the upper surface of the PP flame-retardant board and thus further ensuring the drying effect of the PP flame-retardant board. Simultaneously, since the soft absorbent material is provided on the side of the first oscillating plate facing the heating chamber, the soft absorbent material can also be dried by the heat of the heating chamber after wiping the PP flame-retardant board.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. The PP flame-retardant board drying equipment of the present invention, compared with the existing PP flame-retardant board drying equipment, allows the PP flame-retardant board to first be rolled and wiped by the first sponge roller and the second sponge roller when it enters the drying equipment, so as to absorb the liquid on the surface of the PP flame-retardant board. Then, the surface of the PP flame-retardant board is aligned and dried by the heating device, which not only ensures the drying effect of the PP flame-retardant board, but also improves the drying efficiency of the PP flame-retardant board.

[0028] 2. The PP flame-retardant board drying equipment of the present invention, compared with the existing PP flame-retardant board drying equipment, further includes a first extrusion section and a second extrusion section inside the drying equipment for extruding the first sponge roller and the second sponge roller. The first extrusion section and the second extrusion section cause the first sponge roller and the second sponge roller to squeeze out the liquid absorbed by the sponge roller when they rotate to a designated position, and allow the squeezed liquid to flow into the first collection tank and the second collection tank for collection, so as to continuously ensure the adsorption effect of the sponge roller on the liquid on the surface of the PP flame-retardant board, thereby ensuring the drying effect and drying efficiency of the PP flame-retardant board.

[0029] 3. The PP flame-retardant board drying equipment of the present invention, compared with existing PP flame-retardant board drying equipment, has a barrier part set inside the machine casing. The barrier part, together with the machine casing, forms a heating chamber inside the equipment. The barrier part isolates the heating chamber from the first sponge roller and the second sponge roller, concentrating the heat required for drying inside the heating chamber, reducing heat dissipation to the first sponge roller and the second sponge roller, and reducing the useless drying and heating of the PP flame-retardant board that has not been wiped by the sponge roller, thus reducing heat loss.

[0030] 4. The PP flame-retardant board drying equipment of the present invention also has an arc-shaped part at the top of the heating chamber and a guide groove on the barrier part, which facilitates the discharge of water vapor when drying PP flame-retardant boards inside the heating chamber, and prevents water vapor from re-condensing inside the heating chamber and dripping back onto the PP flame-retardant boards, thereby further ensuring the drying effect of PP flame-retardant boards. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is a front view of the present invention;

[0033] Figure 3 For the present invention Figure 2 EE section view;

[0034] Figure 4 For the present invention Figure 3 Enlarged view of A in the middle;

[0035] Figure 5 For the present invention Figure 3 Enlarged view of B in the middle;

[0036] Figure 6 This is a three-dimensional structural diagram of the second sponge roller in this invention;

[0037] Figure 7 This is a three-dimensional structural diagram of the second collection tank in this invention;

[0038] Figure 8This is a cross-sectional view of the second sponge roller after the baffle is added in this invention.

[0039] In the diagram: 1. Machine casing; 2. Feed inlet; 3. Discharge outlet; 4. Drive roller; 5. Heating device; 501. First hot air inlet; 502. Second hot air inlet; 6. First sponge roller; 7. Second sponge roller; 701. Sponge layer; 702. Hollow sleeve; 703. Through hole; 8. First motor; 9. Second motor; 10. First extrusion section; 11. First collection tank; 12. Second collection tank; 1201. Collection port; 13. Barrier section; 14. Heating chamber; 15. Through port; 16. Blowing section; 17. Arc-shaped section; 18. Guide channel; 19. Guide plate; 20. Water outlet; 21. Arc-shaped plate; 22. First swing plate; 23. Second swing plate; 24. Soft absorbent material; 25. Pulley; 26. Belt; 27. Baffle; 28. Second extrusion section. Detailed Implementation

[0040] Please see Figures 1 to 8 This invention provides a PP flame-retardant board drying device, the technical solution of which is as follows:

[0041] A PP flame-retardant board drying device includes a housing 1. A feed inlet 2 is provided on one side of the housing 1, and a discharge outlet 3 is provided on the other side of the housing 1 opposite to the feed inlet 2. Multiple drive rollers 4 are horizontally arranged inside the housing 1 to move the PP flame-retardant board. The drive rollers 4 are connected by belts or chains and are driven by motors to rotate synchronously. The housing 1 has an internal baffle 13 with an opening 15 for the PP flame-retardant board to pass through. The baffle 13, together with the outer wall of the housing 1, forms a heating chamber 14 on the side of the housing 1 near the discharge port 3. The top of the heating chamber 14 has an arc-shaped section 17 that slopes downwards and is connected to the baffle 13. The baffle 13 has a guide channel 18 that passes through the baffle 13 and slopes downwards towards the second sponge roller 7 along the tangent of the arc-shaped section 17. A guide plate 19 is located below the outlet of the guide channel 18 on the side near the second sponge roller 7, with the suspended end of the guide plate 19 contacting the second sponge roller 7. An arc-shaped plate 21 is located below the horizontal line of the feed inlet 2 inside the heating chamber 14, with the end near the discharge port 3 as the lowest point, and slopes upwards. The heating chamber 14 is equipped with a heating device 5 for heating and drying PP flame-retardant boards. The heating device 5 includes a first hot air outlet 501 and a second hot air outlet 502 for blowing out hot air. The first hot air outlet is arranged from bottom to top towards the arc-shaped part 17, and the second hot air outlet 502 is arranged from top to bottom towards the arc-shaped plate 21. A first sponge roller 6 is rotatably arranged inside the housing 1 near the feed inlet 2. The surface of the first sponge roller 6 is water-absorbing sponge. The first sponge roller 6 is located below the feed inlet 2. A first motor 8 for driving the first sponge roller 6 to rotate is installed on the housing 1. A first extrusion part 10 for extruding the first sponge roller 6 is provided inside the housing 1. The first extrusion part 10 consists of two vertical plates installed vertically on the left and right sides of the first sponge roller 6. The distance between the two vertical plates is less than the diameter of the sponge roller in its natural state. A first collection trough 11 is installed below the first sponge roller 6, and a water outlet 20 is opened at the bottom of the heating chamber 14. The water outlet 20 is connected to the first collection trough 11.

[0042] refer to Figures 3 to 7A second collecting trough 12 is fixedly installed inside the housing 1. The second collecting trough 12 is cylindrical and located directly above the first sponge roller 6. A barrier 13 separates the first sponge roller 6, the second sponge roller 7, and the discharge port 3. A collecting port 1201 is opened at the top of the second collecting trough 12. A second sponge roller 7 is rotatably installed inside the housing 1. The second sponge roller 7 includes a sponge layer 701 made of absorbent sponge and a hollow sleeve 702. The sponge layer 701 is fixedly installed on the hollow sleeve 702. Multiple rows of through holes 703 are evenly opened on the side wall of the hollow sleeve 702. The inner diameter of the hollow sleeve 702 is the same as the outer diameter of the second collecting trough 12. The hollow sleeve 702 on the second sponge roller 7 is rotatably sleeved on the second collecting trough 12. A second motor 9 is fixedly installed on the housing 1. The second motor 9 drives the second sponge roller 7 to rotate around the second collecting trough 12 through a pulley 25 and a belt 26. The housing 1 is provided with a second extrusion section 28 for extruding the second sponge roller 7. The second extrusion section 28 is an arc-shaped surface located above the second sponge roller 7. The distance from the highest point of the arc-shaped surface to the center of the second sponge roller 7 is less than the radius of the second sponge roller 7.

[0043] A blowing section 16 is provided above the opening 15 of the barrier section 13. The blowing section 16 uses cold air, and the width of the air outlet of the blowing section 16 is the same as the width of the PP flame-retardant board. The blowing section 16 is inclined from top to bottom towards the feed inlet 2, and the air outlet of the blowing section 16 is set towards the lowest point of the second sponge roller 7.

[0044] refer to Figure 1 , Figure 2 , Figure 3 A first swing plate 22 for closing the outlet 3 is rotatably installed at the outlet 3. The first swing plate 22 can swing along the forward direction of the PP flame-retardant plate to open the outlet 3. A soft water-absorbing material 24 is provided on the side of the first swing plate 22 facing the heating chamber 14. The water-absorbing material can be water-absorbing cotton cloth, cotton, water-absorbing sponge or other soft materials that can absorb liquid. A second swing plate 23 for closing the through-hole 15 is rotatably installed at the through-hole 15. The second swing plate 23 can swing along the forward direction of the PP flame-retardant plate to open the through-hole 15.

[0045] refer to Figure 3 , Figure 4During use, the PP flame-retardant board is washed and conveyed to the housing 1 by the conveyor belt, and enters the housing 1 through the feed port 2 on the housing 1. The PP flame-retardant board inside the housing 1 continues to move forward under the drive roller 4 inside the housing 1. During the forward movement, it first passes through the gap between the first sponge roller 6 and the second sponge roller 7. The first sponge roller 6 contacts the bottom surface of the PP flame-retardant board, and the second sponge roller 7 contacts the top surface of the PP flame-retardant board. When the first sponge roller 6 and the second sponge roller 7 contact the surface of the PP flame-retardant board, the residual cleaning liquid on the PP flame-retardant board will be absorbed by the first sponge roller 6 and the second sponge roller 7, reducing the residue of cleaning liquid on the PP flame-retardant board. Simultaneously, as the first sponge roller 6 rotates driven by the first motor 8, its two sides are constantly pressed against the two vertical plates. When the sponge roller rotates to the point of contact with the two vertical plates, the sponge on the first sponge roller 6 is squeezed by the two vertical plates, and the cleaning liquid absorbed by the first sponge roller 6 is squeezed and gathered together, flowing downwards into the first collection tank 11 for collection. At the same time, after the second sponge roller 7 contacts the top surface of the PP flame-retardant board, it also absorbs the residual cleaning liquid on the top surface of the PP flame-retardant board. The second sponge roller 7 rotates driven by the second motor 9, and whenever the absorbent sponge on the second sponge roller 7 rotates to the top, it is squeezed by the second extrusion part. The cleaning liquid absorbed by the second sponge roller 7 gathers under the extrusion of the second extrusion part and flows downwards into the hollow sleeve 702 under the action of gravity. The hollow sleeve 702 has multiple rows of through holes 703, through which the cleaning liquid can flow into the second collection tank 12 for collection.

[0046] refer to Figure 3 , Figure 4 After the PP flame-retardant board passes through the gap between the first sponge roller 6 and the second sponge roller 7, the air blown out by the air blowing unit 16 will come into contact with the upper surface of the PP flame-retardant board. The air blown out by the air blowing unit 16 forms an air curtain. The air curtain gathers the residual cleaning liquid on the top of the PP flame-retardant board that the second sponge roller 7 could not completely absorb, and blows the gathered residual cleaning liquid to the position where the second sponge roller 7 contacts the top surface of the PP flame-retardant board. The second sponge roller 7, which is easy to rotate, can absorb and dry the gathered residual cleaning liquid.

[0047] refer to Figure 3When the PP flame-retardant board advances to the opening 15, its front end contacts the second swing plate 23. As the PP flame-retardant board pushes open the second swing plate 23, it enters the heating chamber 14. Inside the heating chamber 14, the PP flame-retardant board, guided by the arc-shaped portion 17 at the top of the heating chamber 14 and the arc-shaped plate 21 below the heating chamber 14, is exposed to hot air from the first hot air vent and the second hot air vent 502, which then further dries the board. As the PP flame-retardant board continues to advance, when it blocks the first and second hot air vents 502, the hot air from the first hot air vent blows directly onto the bottom of the PP flame-retardant board to dry it, while the hot air from the second hot air vent 502 blows directly onto the top of the PP flame-retardant board to dry it.

[0048] refer to Figure 3 , Figure 5 After drying, the PP flame-retardant board, driven by the drive roller 4, pushes the first swing plate 22 upward to open the discharge port 3, finally leaving the machine casing 1 through the discharge port 3. As the PP flame-retardant board leaves the machine casing 1 through the discharge port 3, the soft absorbent material 24 on the first swing plate 22 will also perform a final wipe to dry the surface of the PP flame-retardant board. After the PP flame-retardant board has completely passed through the discharge port 3, the first swing plate 22 returns to its original position under the action of gravity, re-closing the discharge port 3 to reduce heat loss from the heating chamber 14. This completes the entire drying operation of the PP flame-retardant board.

[0049] In addition, refer to Figure 8 When the second sponge roller 7 is squeezed by the second extrusion section, in order to ensure that the cleaning liquid squeezed out by the second sponge roller 7 flows smoothly into the second collection tank 12, multiple baffles 27 of the same length as the hollow sleeve 702 can be provided on the outer wall of the hollow sleeve 702 of the second sponge roller 7. The baffles 27 are arranged along the axial direction of the hollow sleeve 702 and are evenly distributed circumferentially on the outer wall of the hollow sleeve 702. In this way, the baffles 27 divide the second sponge roller 7 into multiple fan-shaped areas, preventing the squeezed cleaning liquid from flowing downwards, and confining the squeezed cleaning liquid within the fan-shaped area. As the second sponge roller 7 rotates, it enters the second collection tank 12 from the collection port 1201 and is collected, further preventing the squeezed cleaning liquid from flowing back onto the upper surface of the PP flame-retardant board.

[0050] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A PP flame-retardant board drying device, comprising a housing (1), wherein a feed inlet (2) is provided on one side of the housing (1), and a discharge outlet (3) is provided on the other side of the housing (1) opposite to the feed inlet (2); a plurality of drive rollers (4) for moving the PP flame-retardant board are horizontally arranged inside the housing (1); and a heating device (5) for heating and drying the PP flame-retardant board is provided inside the housing (1); characterized in that, A first sponge roller (6) is rotatably arranged inside the housing (1) near the feed inlet (2). The first sponge roller (6) is located below the feed inlet (2). A second sponge roller (7) is rotatably arranged inside the housing (1). The second sponge roller (7) is located above the feed inlet (2), and the second sponge roller (7) is vertically opposite to the first sponge roller (6). A first motor (8) for driving the first sponge roller (6) to rotate and a second motor (9) for driving the second sponge roller (7) to rotate are installed on the housing (1). A first extrusion part (10) for extruding the first sponge roller (6) and a second extrusion part (28) for extruding the second sponge roller (7) are provided inside the housing (1). A first collection trough (11) and a second collection trough (12) are also provided inside the housing (1). The first collection trough (11) and the second collection trough (12) are respectively used to collect the liquid extruded by the first sponge roller (6) and the second sponge roller (7).

2. The PP flame-retardant board drying equipment according to claim 1, characterized in that: The first extrusion section (10) consists of two vertical plates installed vertically on the left and right sides of the first sponge roller (6). The distance between the two vertical plates is less than the diameter of the sponge roller in its natural state. The first collection groove (11) is installed below the first sponge roller (6). The second sponge roller (7) includes a sponge layer (701) and a hollow sleeve (702). The sponge layer (701) is fixedly installed on the hollow sleeve (702). Multiple rows of through holes (703) are evenly opened on the side wall of the hollow sleeve (702). The second collection groove (11) is installed below the first sponge roller (6). The groove (12) is cylindrical and the outer diameter of the second collection groove (12) is the same as the inner diameter of the hollow sleeve (702). The second collection groove (12) is fixedly installed inside the housing (1). A collection port (1201) is opened at the top of the second collection groove (12). The hollow sleeve (702) is rotatably installed on the collection groove. The second extrusion part (28) is an arc-shaped surface set above the second sponge roller (7). The distance from the highest point of the arc-shaped surface to the center of the second sponge roller (7) is less than the radius of the second sponge roller (7).

3. The PP flame-retardant board drying equipment according to claim 1, characterized in that: The housing (1) is provided with a barrier (13) inside. The barrier (13) separates the first sponge roller (6) and the second sponge roller (7) from the discharge port (3). The barrier (13) and the outer wall of the housing (1) form a heating chamber (14) inside the housing (1) on the side near the discharge port (3). The barrier (13) is provided with a through-hole (15) for the PP flame retardant board to pass through. The heating device (5) is installed inside the heating chamber (14).

4. The PP flame-retardant board drying equipment according to claim 3, characterized in that: A blowing section (16) is provided above the opening (15) of the barrier section (13). The width of the blowing section (16) is the same as the width of the feed inlet (2). The blowing section (16) is inclined from top to bottom towards the feed inlet (2), and the air outlet of the blowing section (16) is set towards the lowest point of the second sponge roller (7).

5. The PP flame-retardant board drying equipment according to claim 3, characterized in that: The top of the heating chamber (14) is provided with an arc-shaped part (17), which is inclined from top to bottom. The arc-shaped part (17) is connected to the barrier part (13), and the barrier part (13) is provided with a guide groove (18). The guide groove (18) passes through the barrier part (13). The guide groove (18) is inclined downward along the tangent direction of the arc-shaped part (17) toward the second sponge roller (7). A guide plate (19) is provided below the outlet of the guide groove (18) near the second sponge roller (7). The suspended end of the guide plate (19) is in contact with the second sponge roller (7). The bottom of the heating chamber (14) is provided with a water outlet (20), which is connected to the first collection tank (11).

6. The PP flame-retardant board drying equipment according to claim 5, characterized in that: An arc-shaped plate (21) is provided below the horizontal line of the feed inlet (2) in the heating chamber (14). The arc-shaped plate (21) is inclined from bottom to top with the end closest to the discharge outlet (3) as the lowest point. The heating device (5) includes a first hot air outlet (501) and a second hot air outlet (502) for blowing out hot air. The first hot air outlet is arranged from bottom to top towards the arc-shaped part (17), and the second hot air outlet (502) is arranged from top to bottom towards the arc-shaped plate (21).

7. The PP flame-retardant board drying equipment according to claim 3, characterized in that: A first swing plate (22) for closing the discharge port (3) is rotatably installed at the discharge port (3). The first swing plate (22) can swing along the forward direction of the PP flame retardant plate to open the discharge port (3). A second swing plate (23) for closing the through port (15) is rotatably installed at the through port (15). The second swing plate (23) can swing along the forward direction of the PP flame retardant plate to open the through port (15).

8. A PP flame-retardant board drying device according to claim 7, characterized in that: The side of the first swing plate (22) facing the heating chamber (14) is provided with a soft absorbent material (24).

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