Headbox for papermaking

Abstract

The utility model discloses a papermaking headbox which comprises a box body which is of a rectangular box-shaped structure, a collecting plate is placed at the bottom end in the box body and is of an L-shaped plate body structure, a control valve is arranged at the position, located on the side wall face of the box body, of the bottom end of the collecting plate in a penetrating mode, and the control valve is arranged on a pipeline on the side wall face of the box body. The interior of the box body is divided into two cavities by a collecting plate; and the backflow pipe penetrates through one side of the upper end of the box body, flow dividing pipes are arranged on the side wall face of the backflow pipe at equal intervals in the vertical direction, the flow dividing pipes communicate with one end of a butt joint pipe, and the butt joint pipe penetrates through the interior of the collecting plate. According to the headbox for papermaking, the flow dividing pipe is directly in butt joint with the interior of the backflow pipe, paper pulp is supplemented into the box body in a continuous flowing state through the backflow pipe, the paper pulp is rapidly dispersed in cooperation with the flow dividing pipe, the paper pulp rapidly flows into papermaking equipment through opening and closing of a control valve, and fibers in the paper pulp are rapidly dispersed in cooperation with a scattering frame; and paper pulp fiber blocking is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of papermaking equipment, in particular to a headbox for papermaking. Background Art

[0002] The headbox is a key papermaking equipment in modern paper machines. Its structure can effectively disperse fibers. The high-turbulence headbox can generate high-intensity micro-turbulence, which can effectively disperse fibers, prevent fiber precipitation and re-flocculation, and effectively improve the strength of paper sheets, which plays a decisive role in the formation of paper sheets and the quality of paper.

[0003] When the existing headbox is in use, the flow direction of the pulp is directly provided through the internal box body of the headbox, so that the pulp is easily accumulated inside the headbox to form lumps, resulting in a decrease in paper quality. As the pulp lumps, it is easy to adhere to the inner wall surface of the headbox. Since the interior of the headbox is mostly a sealed environment, the difficulty of cleaning is increased. As the pulp continues to flow out from the opening, the internal pulp capacity gradually decreases, resulting in a decrease in the flow rate of the pulp, making it easy for the fibers inside the pulp to accumulate and form, resulting in inconsistent quality of the front and back papers. Utility Model Content

[0004] The utility model aims to provide a headbox for papermaking, so as to solve the problem mentioned in the above background technology that pulp is easy to accumulate inside the headbox to form lumps, resulting in reduced paper quality, and the pulp lumps are easy to adhere to the inner wall of the headbox, increasing the difficulty of cleaning, and as the internal pulp capacity gradually decreases, the flow rate of the pulp decreases, making it easy for the fibers inside the pulp to accumulate and form, resulting in the problem of inconsistent quality of the front and back papers.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a headbox for papermaking, comprising a box body, which is arranged as a rectangular box-shaped structure, a collecting plate is placed at the bottom end of the box body, and the collecting plate is arranged as an L-shaped plate structure, the bottom end of the collecting plate is provided with a through pipe located on the side wall of the box body, and a control valve is provided on the side wall of the box body, and the inside of the box body is divided into two chambers by the collecting plate;

[0006] A return pipe, which passes through one side of the upper end of the box body, and the side wall of the return pipe is provided with a diversion pipe at equal intervals in a vertical direction, and the diversion pipe is connected to one end of the butt pipe, and the butt pipe passes through the inside of the collecting plate, and the other end of the butt pipe is connected to the slurry flow pipe;

[0007] The transfer pipe is equidistantly installed on the side wall of the slurry flow pipe, one end of the transfer pipe is connected to the inside of the spraying pipe, and the transfer pipe and the spraying pipe are located inside the box and are equidistantly inclined in the vertical direction. The spraying pipe is arranged parallel to the debonding frame, and one end of the debonding frame is slidably connected to the inside of the collecting plate.

[0008] The above technical solution is adopted to provide a sufficient flow environment for the fibers inside the pulp, thereby improving the papermaking quality.

[0009] Preferably, the side wall surface of the box body provided with the pipeline is provided with a viewing window, and the bottom end of one end of the box body pipeline is flush with the bottom end of the inclined surface provided at the bottom end of the collecting plate.

[0010] By adopting the above technical solution, the box body is used to assist the installation of the collecting plate, and the inclined surface at the bottom end of the collecting plate is used to assist the slurry concentration.

[0011] Preferably, the return pipe is configured as an L-shaped pipe structure, and one side of the bottom end of the return pipe penetrates through the side wall of the box body, and the return pipe and the diversion pipe form a T-shaped pipe structure.

[0012] By adopting the above technical solution, as the return pipe and the diversion pipe are connected, the pulp is quickly sent into the internal operation of the connecting pipe through the diversion pipe.

[0013] Preferably, a trapezoidal block structure is provided on one side of the butt-joint pipe penetrating the collecting plate, and a sealed flange joint is provided at the connection between the butt-joint pipe and the slurry flow pipe.

[0014] By adopting the above technical solution, the trapezoidal block on one side of the collecting plate provides a limit for the pipe installation.

[0015] Preferably, the upper end of the transfer tube is snap-connected with a guide plate, and through holes are equidistantly arranged inside the guide plate. The guide plate is arranged parallel to the debonding frame, and a dispersion plate is arranged at the bottom end of the inner groove of the debonding frame.

[0016] By adopting the above technical solution, the transfer tube and the guide plate are positioned in coordination, so that the holes inside the guide plate can disperse the fallen pulp fluid.

[0017] Preferably, buffer racks are equidistantly arranged on the inner wall of the groove of the unraveling rack located above the dispersion plate, and the side wall of the unraveling rack is connected to the pull-out plate, and the side wall of the pull-out plate is equidistantly arranged on the side wall of the pull-out plate.

[0018] By adopting the above technical solution, the dispersion plate inside the debonding frame can maintain sufficient internal flow along the inclined surface during the contact and molding process between the dispersion plate inside the debonding frame and the fibers inside the slurry.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the headbox for papermaking:

[0020] 1. When using the device, the shunt pipe is directly connected to the inside of the return pipe, and the pulp is continuously replenished to the inside of the box through the return pipe. The shunt pipe is used to quickly disperse the pulp. By opening and closing the control valve, the pulp quickly flows into the papermaking equipment. The breaking frame is used to quickly disperse the fibers in the pulp to prevent the pulp fibers from agglomerating.

[0021] 2. The box body and the pull-out plate are combined with the scattering frame to form a pull-out structure, and the internal structure of the box body is quickly opened for tilting, so as to facilitate the cleaning of the fluid remaining on the inner wall of the headbox, and avoid the slurry from being agglomerated on the inner wall of the box body and the surface of the scattering frame, which affects the flow of pulp;

[0022] 3. As the spray pipe transports the pulp to one side, the guide plate and the dispersion plate cooperate to quickly move the flowing pulp downward and along the inclined side of the dispersion plate, so that the pulp and internal fibers are quickly dispersed to the periphery to avoid the agglomeration of fibers. The inclined structure at the bottom of the collecting plate cooperates to quickly concentrate the pulp to flow to one side of the control valve, keep the outflowing pulp evenly discharged, and avoid a large change in the outflowing thickness of the pulp. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall internal front view structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the overall internal side structure of the utility model;

[0025] Figure 3 This is a schematic diagram of the overall internal top view structure of the utility model;

[0026] Figure 4 For this utility model Figure 1 Enlarged structural diagram at A in the middle.

[0027] In the figure: 1. Box body; 2. Collecting plate; 3. Control valve; 4. Reflux pipe; 5. Diverter pipe; 6. Butt joint pipe; 7. Slurry flow pipe; 8. Transfer pipe; 9. Spraying pipe; 10. Guide plate; 11. Breaking frame; 12. Buffer frame; 13. Dispersing plate; 14. Pull-out plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-4 The utility model provides a technical solution: a headbox for papermaking, comprising a box body 1, a collecting plate 2, a control valve 3, a return pipe 4, a diversion pipe 5, a butt pipe 6, a head pipe 7, a transfer pipe 8, a spray pipe 9, a guide plate 10, a breaking frame 11, a buffer frame 12, a dispersion plate 13 and a pull-out plate 14;

[0030] Among them, the box body 1 is set as a rectangular box structure, a collecting plate 2 is placed at the bottom of the box body 1, and the collecting plate 2 is set as an L-shaped plate structure, the bottom of the collecting plate 2 is located on the side wall of the box body 1 and is provided with a through pipe, and the side wall of the box body 1 is provided with a control valve 3, the inside of the box body 1 is divided into two chambers by the collecting plate 2, the side wall of the box body 1 is provided with a viewing window, and the bottom of one end of the box body 1 pipe is flush with the bottom of the inclined surface provided at the bottom of the collecting plate 2;

[0031] When using the device, the inside of the box body 1 is snap-connected with the collecting plate 2. Figure 1 and Figure 3 As shown, the internal space of the box body 1 is divided by the collecting plate 2, and the inclined structure arranged at the bottom end of the collecting plate 2 is as shown in FIG. Figure 1 As shown, it is convenient to quickly collect the fallen pulp, flow along the bottom slope of the collecting plate 2 to one side through the pipeline of the box 1 to the control valve 3, and supply pulp to the papermaking equipment through the opening and closing of the control valve 3. As the bottom end of the slope of the collecting plate 2 is flush with the bottom end of the pipeline of the box 1, as shown in FIG. Figure 1 As shown;

[0032] The return pipe 4 passes through one side of the upper end of the box body 1, and the side wall of the return pipe 4 is equidistantly provided with a diverter pipe 5 in a vertical direction, and the diverter pipe 5 is connected with one end of the butt pipe 6, the butt pipe 6 passes through the inside of the collecting plate 2, and the other end of the butt pipe 6 is connected with the slurry flow pipe 7, the return pipe 4 is set as an L-shaped pipe structure, and one side of the bottom end of the return pipe 4 passes through the side wall of the box body 1, the return pipe 4 and the diverter pipe 5 form a T-shaped pipe structure, and a trapezoidal block structure is provided on one side of the butt pipe 6 passing through the collecting plate 2, and a sealed flange joint is provided at the connection between the butt pipe 6 and the slurry flow pipe 7;

[0033] When in use, the top of the return pipe 4 is connected to the pulp fluid, so that the return pipe 4 can send the pulp fluid into the vertically arranged branch pipe 5. Figure 1 As shown, the L-shaped pipe arranged at the bottom end of the return pipe 4 is used for rapid recovery of residual pulp, and cooperates with the pump body to allow the pulp to enter from the upper end of the return pipe 4, so that the pulp is in a continuous flow state. As the pulp collected by the diversion pipe 5 flows from the butt joint pipe 6 to the pulp flow pipe 7, the pulp flow pipe 7 is sent into the transfer pipe 8 and the spray pipe 9, wherein the transfer pipe 8 and the spray pipe 9 are arranged in a cross shape, as shown in FIG. Figure 3 As shown, the bottom end of the spray pipe 9 is opened to quickly spray out the pulp. Since the transfer pipe 8 and the spray pipe 9 are arranged in an inclined shape, as shown in FIG. Figure 1 As shown, it is convenient to quickly flow the pulp to the outside, quickly break up the fibers inside the pulp, avoid the fiber agglomeration causing blockage inside the control valve 3, and cooperate with the trapezoidal block on one side of the collecting plate 2 to provide a limit for the installation position of the butt pipe 6;

[0034] The transfer pipe 8 is equidistantly installed on the side wall of the slurry flow pipe 7, one end of the transfer pipe 8 is connected to the inside of the spray pipe 9, and the transfer pipe 8 and the spray pipe 9 are arranged in the box body 1 in an equidistant and inclined manner in the vertical direction, the spray pipe 9 is arranged in parallel with the disintegration frame 11, and one end of the disintegration frame 11 is slidably connected to the inside of the collecting plate 2, the upper end of the transfer pipe 8 is snap-connected with a guide plate 10, and the inside of the guide plate 10 is equidistantly provided with through holes, the guide plate 10 is arranged in parallel with the disintegration frame 11, and a dispersion plate 13 is arranged at the bottom end of the groove of the disintegration frame 11, and a buffer frame 12 is equidistantly arranged on the inner wall of the groove of the disintegration frame 11 above the dispersion plate 13, and the side wall of the disintegration frame 11 is connected to the pull-out plate 14, and the side wall of the pull-out plate 14 is equidistantly provided with the disintegration frame 11;

[0035] The spray pipe 9 installed on one side of the transfer pipe 8 is as shown in FIG. Figure 1 and Figure 2 As shown, the pulp flows through the bottom opening of the spray pipe 9 to the buffer frame 12 and the dispersion plate 13 inside the groove of the scattering frame 11. The internal holes and gaps of the buffer frame 12 and the dispersion plate 13 provide a dispersion space for the pulp to flow. As the scattering frame 11 is set to be installed in an inclined state, it is convenient for the pulp to flow quickly to one side, improve the fluidity of the pulp, and avoid the limited agglomeration inside the pulp. When combined, the guide plate 10 above the scattering frame 11 passes through the internal holes to prevent the pulp flowing inside the upper buffer frame 12 and the dispersion plate 13 from falling directly downward, causing the pulp to splash and stick to the inner wall surface of the box body 1, which is convenient for later cleaning. The scattering frame 11 is separated from the box body 1 by pulling the pull-out plate 14. Figure 1 and Figure 3 As shown, the fibers inside the pulp are broken up at a high speed by the buffer frame 12 and the dispersion plate 13 in combination with the guide plate 10, so that the pulp can maintain a uniform flow speed and flow out from one side of the collecting plate 2.

[0036] Working principle: When using the papermaking headbox, the top opening of the return pipe 4 is directly connected to the pulp liquid, the unflowed pulp is recovered through the bottom opening of the return pipe 4, and the pulp is sent to the inside of the docking pipe 6 through the diversion pipe 5. The pulp is quickly sent to the top of the dispersion plate 13 inside the scrambler 11 along with the pulp flow pipe 7 and the transfer pipe 8, so that the surface of the dispersion plate 13 receives the pulp sprayed from the spray pipe 9 arranged parallel to the top, and the buffer frame 12 and the guide plate 10 are used for buffering, so that the internal fibers of the sprayed pulp can be quickly dispersed to the surface of the dispersion plate 13. The inclination of the dispersion plate 13 and the internal hole setting facilitate the rapid dispersion of the limit in the pulp flow, and the inclined surface set at the bottom of the collecting plate 2 is used to concentrate the pulp flow liquid, and it is discharged through the side wall pipeline of the box body 1 and the control valve 3 for papermaking, which increases the overall practicality.

[0037] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A headbox for papermaking, comprising a headbox body (1), a return pipe (4) and a transfer pipe (8), characterized in that: The box body (1) is configured as a rectangular box-shaped structure, a collecting plate (2) is placed at the bottom of the box body (1), and the collecting plate (2) is configured as an L-shaped plate structure, the bottom of the collecting plate (2) is provided with a through-hole located on the side wall of the box body (1), and a control valve (3) is provided on the side wall of the box body (1), and the inside of the box body (1) is divided into two chambers by the collecting plate (2); A return pipe (4) passes through one side of the upper end of the box body (1); a branch pipe (5) is arranged on the side wall of the return pipe (4) at equal intervals in a vertical direction, and the branch pipe (5) is connected to one end of a butt pipe (6); the butt pipe (6) passes through the interior of the collecting plate (2), and the other end of the butt pipe (6) is connected to a slurry flow pipe (7); The transfer pipe (8) is equidistantly installed on the side wall of the slurry flow pipe (7), one end of the transfer pipe (8) is connected to the inside of the spray pipe (9), and the transfer pipe (8) and the spray pipe (9) are arranged in a vertical direction with equal distances and tilted inside the box (1), the spray pipe (9) is arranged in parallel with the debonding frame (11), and one end of the debonding frame (11) is slidably connected to the inside of the collecting plate (2).

2. A headbox for papermaking according to claim 1, characterized in that: The side wall surface of the box body (1) provided with a pipeline is provided with a viewing window, and the bottom end of one end of the pipeline of the box body (1) is flush with the bottom end of the inclined surface provided at the bottom end of the collecting plate (2).

3. A headbox for papermaking according to claim 1, characterized in that: The return pipe (4) is configured as an L-shaped pipe structure, and one side of the bottom end of the return pipe (4) penetrates the side wall surface of the box body (1), and the return pipe (4) and the diversion pipe (5) form a T-shaped pipe structure.

4. A headbox for papermaking according to claim 1, characterized in that: A trapezoidal block structure is provided on one side of the butt-joint pipe (6) penetrating the collecting plate (2), and a sealed flange joint is provided at the connection between the butt-joint pipe (6) and the slurry flow pipe (7).

5. A headbox for papermaking according to claim 1, characterized in that: The upper end of the transfer tube (8) is snap-connected with a guide plate (10), and through holes are equidistantly arranged inside the guide plate (10). The guide plate (10) is arranged in parallel with the disassembly frame (11), and a dispersion plate (13) is arranged at the bottom end of the groove inside the disassembly frame (11).

6. A papermaking headbox according to claim 5, characterized in that: The inner wall surface of the groove of the disassembly frame (11) located above the dispersion plate (13) is equidistantly provided with a buffer frame (12), and the side wall surface of the disassembly frame (11) is connected to the pull-out plate (14), and the side wall surface of the pull-out plate (14) is equidistantly provided with the disassembly frame (11).

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