Flow control device of headbox

Abstract

The utility model relates to the technical field of headboxes, in particular to a headbox flow control device. Comprising a headbox; a stirrer is arranged on one side of the headbox; the stirrer is connected with the headbox through a conveying pipe; the stirrer is connected with the conveying pipe through a conveying pump; an adjusting box is mounted between the conveying pipe and the headbox; one end of the conveying pipe is connected with the conveying pump; by arranging the adjusting box, when the conveying pump conveys flow pulp containing foam to the adjusting box, the foam in the flow pulp floats upwards to the upper end of the liquid level under the action of buoyancy, so that the flow pulp can flow into the flow pulp box through the connecting pipe at the lower end, the amount of the foam entering the flow pulp box is reduced, the density of a calcium silicate board is increased, and the production efficiency is improved. The strength and the stability of the plate are improved, bubble holes formed in the surface of the plate are reduced, and the appearance quality and the surface flatness of the plate are improved; therefore, the practical application effect of the utility model is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of headboxes, in particular to a headbox flow control device. Background Art

[0002] Calcium silicate board is a new generation of "green" building materials. It has unique environmental protection functions based on excellent moisture-proof and fire-proof properties. Calcium silicate board is a new type of building material that uses silicon powder and calcium powder as the main base material, natural wood fiber as the reinforcing material, and other auxiliary materials as the external additives. After slurry molding, it is cured at high temperature and high pressure. During the production process, silicon powder, calcium powder, natural wood fiber and other auxiliary materials need to be added to the mixer. After being mixed evenly, the slurry in the mixer is transported to the slurry box by the delivery pump.

[0003] The existing connecting pipe is suitable for conveying slurry with a large flow rate, so the diameter of the connecting pipe is relatively large. However, due to the large flow rate, a large change in the valve opening is required during regulation to significantly affect the flow rate, resulting in low sensitivity of regulation. Therefore, when it is necessary to adjust the thickness of the plate, it is often difficult to achieve precise control of the flow rate of the connecting pipe.

[0004] In view of this, in order to overcome the above technical problems, the utility model proposes a headbox flow control device to solve the above technical problems. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art, the utility model proposes a flow control device for a slurry box. The utility model sets a regulating box, so that when the delivery pump delivers the slurry containing foam to the regulating box, the foam in the slurry will float to the upper end of the liquid surface under the action of buoyancy, so that the slurry can flow into the slurry box through the connecting pipe at the lower end, thereby reducing the foam entering the slurry box, which not only improves the density of the calcium silicate board, increases the strength and stability of the board, but also reduces the formation of bubble holes on the surface of the board, improves the appearance quality and surface smoothness of the board; so that the practical application effect of the utility model is effectively improved.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a flow control device for a flow box of the utility model comprises a flow box; a mixer is arranged on one side of the flow box; the mixer is connected to the flow box through a delivery pipe; the mixer and the delivery pipe are connected through a delivery pump; an adjustment box is installed between the delivery pipe and the flow box; one end of the delivery pipe is connected to the delivery pump, and the other end is connected to the adjustment box; the adjustment box and the flow box are connected through a connecting pipe; an adjustment pipe is arranged above the connecting pipe; an adjustment port is opened on the side wall of the adjustment box; one end of the adjustment pipe is connected to the adjustment port, and the other end is connected to the flow box; a baffle is connected to the inside of the adjustment pipe in a sliding seal; a screw is rotatably connected to the upper end of the baffle; the screw is threadedly connected to the adjustment pipe.

[0007] Preferably, a feed port is provided on the side wall of the regulating box; one end of the delivery pipe away from the delivery pump is connected to the feed port; an L-shaped plate is provided in the regulating box; and the L-shaped plate is fixedly connected to the inner wall of the regulating box.

[0008] Preferably, a feed port is provided on one side of the regulating box; a lifting plate is slidingly and sealably connected to the feed port; a through groove is provided on the surface of the lifting plate; the end of the regulating tube away from the regulating port is connected to the through groove; a lifting unit is installed on the upper end of the regulating box; the lifting unit is used to control the lifting plate to slide up and down in the feed port.

[0009] Preferably, the lifting unit comprises a driving motor; the driving motor is fixedly connected to the side wall of the regulating box; the output shaft of the driving motor is fixedly connected to a transmission gear; a rack is fixedly connected to one side of the lifting plate; the rack is meshed with the transmission gear.

[0010] Preferably, a float is provided in the headbox; the float is located on one side of the lifting plate; a force sensor is fixedly installed on the side of the lifting plate close to the float; and the float is fixedly connected to the force sensor.

[0011] Preferably, a groove is provided on one side of the lifting plate close to the float; a rotating rod is rotatably connected in the groove; the float is fixedly connected to the rotating rod; mounting grooves are provided on the upper end wall and the lower end wall of the groove; an extrusion plate is slidingly and sealingly connected in the mounting groove; the force sensor is embedded in the bottom of the mounting groove; the extrusion plate and the force sensor are connected by a connecting spring.

[0012] The beneficial effects of the utility model are as follows:

[0013] 1. The utility model arranges an adjusting tube above the connecting tube, so that when adjusting the flow rate, only the adjusting tube needs to be adjusted to adjust the amount of slurry flowing into the headbox, without adjusting the connecting tube, thereby reducing the difficulty of adjusting the flow rate in the headbox, and the adjustment sensitivity is high, which is convenient for realizing accurate control of the thickness of the plate; compared with the installation of other electrical control components, the installation of the adjusting tube is simple, the cost is low, and the operation is convenient; thus, the practicality of the utility model is greatly improved.

[0014] 2. The utility model sets a regulating box, so that when the delivery pump delivers the foam-containing slurry to the regulating box, the foam in the slurry will float to the upper end of the liquid surface under the action of buoyancy, so that the slurry can flow into the slurry box through the connecting pipe at the lower end, thereby reducing the foam entering the slurry box, which not only improves the density of the calcium silicate board, increases the strength and stability of the board, but also reduces the formation of bubble holes on the surface of the board, improves the appearance quality and surface smoothness of the board, and effectively improves the practical application effect of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the utility model;

[0018] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0019] Figure 4 yes Figure 2 The enlarged view of point B in the middle;

[0020] Figure 5 yes Figure 2 Enlarged view of point C in the middle;

[0021] In the figure: 1. slurry box; 11. mixer; 111. conveying pipe; 12. conveying pump; 13. feed port; 14. lifting plate; 141. through slot; 15. driving motor; 151. transmission gear; 152. rack; 16. float; 161. force sensor; 17. groove; 171. rotating rod; 18. mounting slot; 181. extrusion plate; 182. connecting spring; 2. adjusting box; 21. adjusting pipe; 211. adjusting port; 22. baffle; 23. screw; 24. feed port; 25. L-shaped plate; 26. connecting pipe. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figures 1 to 5 As shown, a flow control device for a flow box of the utility model comprises a flow box 1; a mixer 11 is arranged on one side of the flow box 1; the mixer 11 is connected to the flow box 1 through a delivery pipe 111; the mixer 11 and the delivery pipe 111 are connected through a delivery pump 12; an adjusting box 2 is installed between the delivery pipe 111 and the flow box 1; one end of the delivery pipe 111 is connected to the delivery pump 12, and the other end is connected to the adjusting box 2; the adjusting box 2 and the flow box 1 are connected through a connecting pipe 26; an adjusting pipe 21 is arranged above the connecting pipe 26; an adjusting port 211 is opened on the side wall of the adjusting box 2; one end of the adjusting pipe 21 is connected to the adjusting port 211, and the other end is connected to the flow box 1; a baffle 22 is connected to the inside of the adjusting pipe 21 in a sliding and sealing manner; a screw 23 is rotatably connected to the upper end of the baffle 22; the screw 23 is threadedly connected to the adjusting pipe 21.

[0024] As an embodiment of the utility model, a feed port 24 is provided on the side wall of the regulating box 2; the end of the delivery pipe 111 away from the delivery pump 12 is connected to the feed port 24; an L-shaped plate 25 is provided in the regulating box 2; the L-shaped plate 25 is fixedly connected to the inner wall of the regulating box 2.

[0025] As an embodiment of the utility model, a feed port 13 is provided on one side of the regulating box 2; a lifting plate 14 is slidingly and sealedly connected inside the feed port 13; a through groove 141 is provided on the surface of the lifting plate 14; one end of the regulating tube 21 away from the regulating port 211 is connected to the through groove 141; a lifting unit is installed on the upper end of the regulating box 2; the lifting unit is used to control the lifting plate 14 to slide up and down in the feed port 13.

[0026] As an embodiment of the present utility model, the lifting unit includes a driving motor 15; the driving motor 15 is fixedly connected to the side wall of the regulating box 2; the output shaft of the driving motor 15 is fixedly connected to a transmission gear 151; a rack 152 is fixedly connected to one side of the lifting plate 14; the rack 152 is meshed with the transmission gear 151.

[0027] As an embodiment of the utility model, a float 16 is provided in the headbox 1; the float 16 is located on one side of the lifting plate 14; a force sensor 161 is fixedly installed on one side of the lifting plate 14 close to the float 16; the float 16 is fixedly connected to the force sensor 161.

[0028] As an embodiment of the present utility model, a groove 17 is provided on one side of the lifting plate 14 close to the floating ball 16; a rotating rod 171 is rotatably connected in the groove 17; the floating ball 16 is fixedly connected to the rotating rod 171; the upper end wall and the lower end wall of the groove 17 are both provided with a mounting groove 18; an extrusion plate 181 is slidably and sealably connected in the mounting groove 18; the force sensor 161 is embedded in the bottom of the mounting groove 18; the extrusion plate 181 is connected to the force sensor 161 through a connecting spring 182;

[0029] During operation, the existing connecting pipe 26 is suitable for conveying slurry with a large flow rate, so that the diameter of the connecting pipe 26 is relatively large. However, due to the large flow rate, a larger change in the valve opening is required during regulation to significantly affect the flow rate, resulting in a low sensitivity of regulation. Therefore, when the thickness of the plate needs to be regulated, it is often difficult to achieve fine control of the flow rate of the connecting pipe 26. In this regard, the utility model arranges an adjusting pipe 21 above the connecting pipe 26. When in use, if the user needs to reduce the flow rate of the adjusting pipe 21, the user only needs to rotate the screw rod 23 in the forward direction, so that the screw rod 23 can push the baffle plate 22 down during the rotation process. The baffle 22 blocks the regulating port 211 during the descending process, so as to reduce the outflow of the regulating port 211. Similarly, if the user needs to increase the flow of the regulating tube 21, he only needs to reversely rotate the screw 23. Because the diameter of the regulating tube 21 is much smaller than the connecting tube 26, the flow of the regulating tube 21 is small, and a slight change in the valve opening can significantly affect the flow, and the adjustment sensitivity is high, which is convenient for realizing accurate control of the thickness of the plate. Compared with the installation of other electrical control components, the installation of the regulating tube 21 is simple, low-cost, and easy to operate, which greatly improves the practicality of the utility model.

[0030] When the existing mixer 11 stirs the raw materials, foam is inevitably generated, and the delivery pump 12 delivers the slurry raw materials containing foam to the slurry box 1, which will cause uneven distribution of bubbles in the slurry, and ultimately affect the density of the calcium silicate board, resulting in a situation of low local density, thereby affecting the strength and stability of the board; and the foam will form bubble holes during the molding process, resulting in pits or bubble marks on the surface of the calcium silicate board, affecting the appearance quality and surface flatness of the board; for this, an additional degassing treatment step is often required, which will not only increase the production cost, but also reduce the production efficiency;

[0031] The utility model is provided with a regulating box 2, so that when the delivery pump 12 delivers the foam-containing slurry to the regulating box 2, the foam in the slurry will float to the upper end of the liquid surface under the action of buoyancy, so that the slurry can flow into the slurry box 1 through the connecting pipe 26 at the lower end, thereby reducing the foam entering the slurry box 1, which not only improves the density of the calcium silicate board, increases the strength and stability of the board, but also reduces the formation of bubble holes on the surface of the board, and improves the appearance quality and surface flatness of the board; so that the practical application effect of the utility model is effectively improved;

[0032] During use, the user adds silicon powder, calcium powder, natural wood fiber and other auxiliary materials into the mixer 11. After being evenly mixed, the delivery pump 12 delivers the slurry in the mixer 11 to the regulating box 2 through the delivery pipe 111, so that the slurry enters the regulating box 2 through the delivery port. At this time, the slurry delivered to the regulating box 2 sinks under the action of its own gravity, while the foam in the slurry floats up under the action of buoyancy, and the sunken slurry is discharged into the slurry box 1 through the connecting pipe 26; if the distance between the delivery port and the connecting pipe 26 is relatively large, part of the slurry will enter the regulating box 2 and drive a small amount of foam to directly enter the connecting pipe 26, thereby causing a small amount of foam to flow into the slurry box 1. In this regard, the utility model sets an L-shaped plate 2 5, so that the L-shaped plate 25 is installed near the conveying port of the regulating box 2, so that the slurry entering the regulating box 2 through the conveying port can be blocked by the L-shaped plate 25 and accumulate in the L-shaped plate 25. As the slurry accumulates continuously, the slurry will overflow the L-shaped plate 25 and flow into the regulating box 2 along the side wall of the L-shaped plate 25; so that the slurry flowing into the conveying port will first overflow to the upper end of the L-shaped plate 25, thereby increasing the sinking distance of the slurry entering the regulating box 2, prolonging the floating time of the foam, and preventing some foam from floating up in time and being brought into the connecting pipe 26 by the slurry, thereby reducing the content of foam in the connecting pipe 26, reducing the influence of the foam on the strength and appearance quality of the board, so that the strength and appearance quality of the board are effectively improved;

[0033] In the process of the connecting pipe 26 and the regulating pipe 21 transporting the slurry to the headbox 1, due to the thin diameter of the regulating pipe 21, the slurry flow rate flowing into the headbox 1 through the regulating pipe 21 is small but the flow velocity is high. Therefore, the slurry dynamic pressure of the headbox 1 near the regulating pipe 21 is high and the static pressure is low, while the connecting pipe 26 has a large diameter, a large flow rate but a low flow velocity, so the dynamic pressure is low and the static pressure is high. This causes the slurry in the connecting pipe 26 to flow back under the action of the static pressure difference when the regulating pipe 21 and the connecting pipe 26 are close to each other, thereby affecting the slurry amount in the headbox 1, and further directly affecting the production thickness of the plate. If the connecting pipe 26 and the regulating pipe 21 are separated from each other in the horizontal direction, although the reflux phenomenon can be avoided, the horizontal distribution of the connecting pipe 26 and the regulating pipe 21 will result in different flow velocities of the slurry on both sides of the headbox 1. The uneven flow velocity leads to different slurry deposition amounts on both sides of the headbox 1, which not only affects the density distribution of the plate, but also makes the thickness and strength of the two sides of the plate different, thereby affecting The thickness of the flow plate is uniform; the connecting pipe 26 and the regulating pipe 21 are arranged up and down, although it can ensure that the slurry flowing out of the connecting pipe 26 and the regulating pipe 21 can be effectively mixed, when the thickness of the plate is small, that is, the slurry liquid surface in the slurry box 1 is located below the regulating pipe 21, the slurry flowing out of the upper regulating pipe 21 will fall and impact on the slurry liquid surface of the slurry box 1, which will not only cause foam to be generated, but also affect the quality of the plate in the slurry box 1; for this, the utility model sets a lifting plate 14; so that the driving motor 15 can drive the lifting plate 14 to slide in the feed port 13 through the transmission gear 151 and the rack 152; so that the lifting plate 14 drives the through groove 141 on the surface to move up and down; thereby changing the distance between the connecting pipe 26 and the regulating pipe 21, especially when the thickness of the plate needs to be small, the slurry flow rate flowing out of the regulating pipe 21 is small at this time, and controlling the lifting plate 14 to descend so that the regulating pipe 21 is close to the slurry liquid surface can reduce the impact of the slurry flowing out of the regulating pipe 21 on the liquid surface and reduce the generation of foam;By setting the float 16 so that the float 16 is located on the liquid surface, when the thickness of the plate decreases, the level of the slurry flowing into the slurry box 1 drops, and the float 16 floating on the liquid surface drops under the action of gravity, so that the float 16 can pull the rotating rod 171 to rotate downward under the action of its own gravity, so that the rotating rod 171 pushes the squeezing plate 181 below to squeeze the connecting spring 182 to generate a squeezing force on the force sensor 161, so that the force sensor 161 is squeezed and transmits an electrical signal to the drive motor 15, so that the drive motor 15 drives the lifting plate 14 downward through the transmission gear 151 Similarly, when the liquid level rises, the float 16 pulls the rotating rod 171 upward to squeeze the upper squeezing plate 181 under the push of buoyancy, so that the squeezing plate 181 pushes the force sensor 161 in the upper mounting groove 18 through the connecting spring 182, so that the upper force sensor 161 transmits an electrical signal to the drive motor 15, so that the drive motor 15 can drive the lifting plate 14 to rise through the transmission gear 151, thereby realizing automatic driving, without human observation, or manual control to adjust the lifting plate 14, so that the practical application effect of the utility model is further improved. ;

[0034] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0035] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A headbox flow control device, characterized in that: The invention comprises a headbox (1); a mixer (11) is arranged on one side of the headbox (1); the mixer (11) is connected to the headbox (1) via a delivery pipe (111); the mixer (11) and the delivery pipe (111) are connected via a delivery pump (12); an adjustment box (2) is installed between the delivery pipe (111) and the headbox (1); one end of the delivery pipe (111) is connected to the delivery pump (12), and the other end is connected to the adjustment box (2); the adjustment box (2) is connected to the headbox (1) The boxes (1) are connected via a connecting pipe (26); an adjusting pipe (21) is arranged above the connecting pipe (26); an adjusting port (211) is provided on the side wall of the adjusting box (2); one end of the adjusting pipe (21) is connected to the adjusting port (211), and the other end is connected to the headbox (1); a baffle (22) is slidably and sealably connected inside the adjusting pipe (21); a screw (23) is rotatably connected to the upper end of the baffle (22); and the screw (23) is threadedly connected to the adjusting pipe (21).

2. A headbox flow control device according to claim 1, characterized in that: A material delivery port (24) is provided on the side wall of the regulating box (2); one end of the delivery pipe (111) away from the delivery pump (12) is connected to the material delivery port (24); an L-shaped plate (25) is provided inside the regulating box (2); and the L-shaped plate (25) is fixedly connected to the inner wall of the regulating box (2).

3. A headbox flow control device according to claim 2, characterized in that: A feed port (13) is provided on one side of the regulating box (2); a lifting plate (14) is slidably and sealably connected inside the feed port (13); a through groove (141) is provided on the surface of the lifting plate (14); an end of the regulating pipe (21) away from the regulating port (211) is connected to the through groove (141); a lifting unit is installed at the upper end of the regulating box (2); the lifting unit is used to control the lifting plate (14) to slide up and down inside the feed port (13).

4. A headbox flow control device according to claim 3, characterized in that: The lifting unit comprises a driving motor (15); the driving motor (15) is fixedly connected to the side wall of the regulating box (2); the output shaft of the driving motor (15) is fixedly connected to a transmission gear (151); one side of the lifting plate (14) is fixedly connected to a rack (152); the rack (152) is meshed with the transmission gear (151).

5. A headbox flow control device according to claim 4, characterized in that: A float (16) is arranged in the headbox (1); the float (16) is located on one side of the lifting plate (14); a force sensor (161) is fixedly installed on one side of the lifting plate (14) close to the float (16); the float (16) is fixedly connected to the force sensor (161).

6. A headbox flow control device according to claim 5, characterized in that: A groove (17) is provided on one side of the lifting plate (14) close to the floating ball (16); a rotating rod (171) is rotatably connected in the groove (17); the floating ball (16) is fixedly connected to the rotating rod (171); the upper end wall and the lower end wall of the groove (17) are both provided with mounting grooves (18); an extrusion plate (181) is slidably and sealably connected in the mounting groove (18); the force sensor (161) is embedded in the bottom of the mounting groove (18); the extrusion plate (181) and the force sensor (161) are connected via a connecting spring (182).

Images