Pulp outlet structure and headbox with same
By using a two-section structure consisting of a guide tube and a diffuser tube, along with a buffer assembly, the problem of excessively high flow rate at the headbox nozzle was solved, achieving uniform pulp distribution and improved forming quality.
Patent Information
- Application Number
- CN202520376489.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-05
AI Technical Summary
The existing headbox nozzle design results in excessively fast pulp flow rate, leading to excessive pulp ejection force, material waste, and poor forming effect.
It adopts a two-section structure consisting of a guide tube and a diffuser tube. The diffuser tube is equipped with a buffer component, which reduces the pulp flow rate. The pulp flow drives the diffuser tube to rotate, converting the power to reduce the pulp flow rate and ensure uniform distribution.
It effectively reduces pulp flow rate, prevents pulp from flying out of the forming wire, improves fiber distribution uniformity, and enhances paper forming quality.
Smart Images
Figure CN223907242U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to papermaking technical field, concretely is a kind of out pulp structure and the headbox with it. BACKGROUND
[0002] The headbox is the key part of modern paper machine, also called the former box, and its structure and performance have decisive effect on the formation of paper sheet and the quality of paper. The headbox has the functions of dispersing fibers and uniformly distributing paper material in the process of guiding paper pulp, which can improve the quality of the finally produced paper.
[0003] The existing headbox usually has a special out pulp structure to ensure that the paper pulp can be uniformly distributed at each position when flowing onto the forming wire. For example, by designing a conical out pulp pipe, the pressure loss of the paper pulp in the flowing process can be offset by the reduction of the pipe diameter, so that the amount of paper pulp flowing out of the pipe is equal, and the paper pulp in each out pulp nozzle can be sprayed out at the same amount. However, when the paper pulp enters the out pulp nozzle, the pipe diameter of the out pulp nozzle is much smaller than that of the out pulp pipe, so the flow rate of the paper pulp in the out pulp nozzle will increase, which may cause the paper pulp to be sprayed too hard, causing the paper pulp to fall outside the forming wire, resulting in waste of materials and affecting the forming effect. Therefore, we propose an out pulp structure and a headbox with the same to solve the above problems. SUMMARY
[0004] The utility model aims at providing an out pulp structure and a headbox with the same to solve the problems raised in the background.
[0005] The utility model is realized by the following technical solutions: an out pulp structure includes an out pulp pipe, a plurality of out pulp nozzles are fixedly arranged on the out pulp pipe, the out pulp nozzles are equidistantly arranged on the same side of the out pulp pipe, the out pulp nozzle is a two-section structure composed of a flow guide pipe and a diffusion pipe, the flow guide pipe is fixedly connected to the out pulp pipe, the diffusion pipe is rotatably connected to the outer side wall of the flow guide pipe, and a buffer assembly is arranged in the diffusion pipe.
[0006] Optionally, the flow guide pipe and the diffusion pipe are both tubular structures with both ends open, the pipe diameter of the diffusion pipe is greater than that of the flow guide pipe, and the diffusion pipe is rotatably connected to the outer side wall of the flow guide pipe through a bearing.
[0007] Optionally, the buffer assembly includes a buffer frame, the outer side wall of the buffer frame is fixedly connected to the inner side wall of the diffusion pipe, and a cross-shaped support frame is fixedly arranged on the inner side wall of the buffer frame.
[0008] Optionally, the buffer assembly further comprises a buffer frame, the buffer frame is fixedly connected to the support frame, and a center point of the buffer frame is fixedly connected to a center point position of the support frame.
[0009] Optionally, the buffer frame is in the shape of a windmill or a fan blade, and when the fluid passes through the buffer frame, the buffer frame can be driven to generate torsion.
[0010] The utility model also includes a headbox, including box, the box is internally hollow structure, its characterized in be: the out pulp pipe is located the inside of the box.
[0011] Compared with the prior art, the utility model provides a kind of out pulp structure and the headbox with it, with following beneficial effects:
[0012] 1. The utility model sets up a buffer assembly in the diffusion pipe of out pulp nozzle, the blocking effect of buffer assembly to paper pulp, paper pulp is reduced flow speed when contacting buffer assembly, the flow of paper pulp drives buffer frame to rotate, drives diffusion pipe whole rotation, converts the power part of the flow of paper pulp diffusion pipe rotation, weakens the power of paper pulp flow, reduces flow speed, so that paper pulp can be more accurately flowed to forming wire, avoid flow rate too fast fly out forming wire outside.
[0013] 2. The utility model further disperses the fiber in paper pulp to each position by the rotation of diffusion pipe, so that fiber distribution is more uniform, improves paper forming quality. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is whole structure schematic diagram of the utility model out pulp structure;
[0015] Figure 2 It is out pulp nozzle side sectional view of the utility model;
[0016] Figure 3 It is buffer assembly front view of the utility model;
[0017] Figure 4 It is headbox structure schematic diagram of the utility model;
[0018] Figure 5 It is headbox side sectional view of the utility model.
[0019] In the drawing: 1, out pulp pipe;2, out pulp nozzle;201, flow guide pipe;202, diffusion pipe;3, buffer assembly;301, buffer frame;302, support frame;303, buffer frame;4, bearing;5, box. DETAILED DESCRIPTION
[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.
[0021] Embodiment one: please refer to Figure 1 Figure 3 A pulp discharging structure, comprising a pulp discharging pipe 1, a plurality of pulp discharging nozzles 2 are fixedly arranged on the pulp discharging pipe 1, the plurality of pulp discharging nozzles 2 are equidistantly arranged on the same side of the pulp discharging pipe 1, the pulp discharging nozzle 2 is a two-section structure composed of a flow guide pipe 201 and a diffusion pipe 202, the flow guide pipe 201 is fixedly connected to the pulp discharging pipe 1, the diffusion pipe 202 is rotatably connected to the outer side wall of the flow guide pipe 201, and the diffusion pipe 202 is provided with a buffer assembly 3, so that the pulp entering the pulp discharging nozzle 2 will enter the diffusion pipe 202 from the flow guide pipe 201, and then touch the buffer assembly 3, so as to be buffered by the buffer assembly 3, reduce the flow speed, and avoid the flow speed being too fast to be sprayed to the outside of the forming net, thereby affecting the forming.
[0022] Further, the flow guide pipe 201 and the diffusion pipe 202 are both tubular structures with both ends open, the pipe diameter of the diffusion pipe 202 is greater than that of the flow guide pipe 201, and the diffusion pipe 202 is rotatably connected to the outer side wall of the flow guide pipe 201 through a bearing 4, so that the diffusion pipe 202 can rotate on the outer side wall of the flow guide pipe 201, and the friction is small, so that the power of the pulp flow can be converted into the power of the diffusion pipe 202 to a greater extent.
[0023] In order to make the process of driving the diffusion pipe 202 to rotate by the pulp flow more clear, the buffer assembly 3 will be described in detail as follows:
[0024] The buffer assembly 3 comprises a buffer frame 301, the outer side wall of the buffer frame 301 is fixedly connected to the inner side wall of the diffusion pipe 202, a support frame 302 in cross shape is fixedly arranged on the inner side wall of the buffer frame 301, and the buffer frame 301 and the support frame 302 both have the function of preliminary buffering, and the flow speed of the pulp is reduced by the blocking effect.
[0025] The buffer assembly 3 further comprises a buffer frame 303 fixedly connected to the supporting frame 302, and a center point of the buffer frame 303 is fixedly connected to a center point position of the supporting frame 302, and the buffer frame 303 is in the shape of a windmill or a fan blade, and when the fluid passes through the buffer frame 303, the buffer frame 303 can be driven to generate a torsion force, so that when the pulp flows from the flow guide pipe 201 into the diffusion pipe 202, the pulp will impact the windward surface of the buffer frame 303, and when the pulp flows from the windward surface to the leeward surface of the buffer frame 303, the power of the pulp flow is equivalent to the power of the wind blowing, thereby providing the rotating power for the buffer frame 303, and since the buffer frame 303 and the supporting frame 302 are fixedly connected, the supporting frame 302 and the buffer frame 301 are fixedly connected, the buffer frame 301 and the diffusion pipe 202 are fixedly connected, and the diffusion pipe 202 and the flow guide pipe 201 are rotatably connected, therefore, part of the power of the pulp flow will finally be converted into the power of the rotation of the diffusion pipe 202, so as to reduce the flow speed of the pulp.
[0026] At the same time, with the rotation of the diffusion pipe 202, the fibers in the pulp in the diffusion pipe 202 can be further dispersed, so that the fiber distribution is more uniform, and the forming quality of the paper is improved.
[0027] Embodiment two: please refer to Figure 4 Figure 5 A headbox, comprising a box body 5, the box body 5 is internally hollow, characterized in that: the pulp outlet pipe 1 is located in the interior of the box body 5, so that the pulp flowing out of the pulp outlet pipe 1 will flow from the pulp outlet position of the box body 5 to the forming wire, realizing the forming of the paper.
[0028] The working principle and use process of the utility model: the principle that the wind blowing to the windmill will make the windmill rotate is used, the power of the pulp flow provides the rotating power for the buffer frame 303 of the windmill structure, and finally part of the power of the pulp flow is converted into the power of the rotation of the diffusion pipe 202, so as to reduce the flow speed of the pulp, avoid the pulp flowing out to the outside of the forming wire due to the too fast flow speed, and influence the paper forming effect.
[0029] It should be noted that, in this text, relational terms such as first and second are used merely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article, or device. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of additional identical elements in the process, method, article, or device including the element.
[0030] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.
Claims
1. A slurry outlet structure comprising a slurry outlet pipe (1), characterized in that: The pulp outlet pipe (1) is fixed with a plurality of pulp outlet nozzles (2), a plurality of pulp outlet nozzles (2) are equidistantly arranged on the same side of the pulp outlet pipe (1), the pulp outlet nozzle (2) is a two-section structure composed of a flow guide pipe (201) and a diffusion pipe (202), the flow guide pipe (201) is fixedly connected to the pulp outlet pipe (1), the diffusion pipe (202) is rotatably connected to the outer side wall of the flow guide pipe (201), and the diffusion pipe (202) is provided with a buffer assembly (3).
2. A slurry delivery structure according to claim 1, wherein: The flow guide pipe (201) and the diffusion pipe (202) are both tubular structures with both ends open, the pipe diameter of the diffusion pipe (202) is greater than the pipe diameter of the flow guide pipe (201), and the diffusion pipe (202) is rotatably connected to the outer side wall of the flow guide pipe (201) through a bearing (4).
3. A slurry delivery structure according to claim 2, wherein: The buffer assembly (3) includes a buffer frame (301), the outer side wall of the buffer frame (301) is fixedly connected to the inner side wall of the diffusion pipe (202), and the inner side wall of the buffer frame (301) is fixedly provided with a cross-shaped support frame (302).
4. A slurry delivery structure according to claim 3, wherein: The buffer assembly (3) further includes a buffer frame (303), the buffer frame (303) is fixedly connected to the support frame (302), and the center point of the buffer frame (303) is fixedly connected to the center point of the support frame (302).
5. A slurry delivery structure according to claim 4, wherein: The buffer frame (303) is in the shape of a windmill or a fan blade, and when the fluid passes through the buffer frame (303), the buffer frame (303) can be driven to generate torsion.
6. A headbox suitable for use in the headbox arrangement of any one of claims 1-5, said headbox comprising a box (5) in the form of an internally hollow structure, characterized in that: The pulp outlet pipe (1) is located inside the box body (5).