An improved structure for the pulp forming tank pipe in high-speed paper machine pulp preparation

Abstract

This utility model relates to an improved structure of the pulp tank pipe for high-speed paper machine pulp preparation. It solves the technical problem of paper breakage caused by pulp and material adhering to the inner wall of the existing pulp tank. It includes a pulp tank mounted on a tank base for storing pulp liquid. The pulp tank has an end cap at its upper end and an overflow port on the outer circumference of the upper end. A pulp conveying pipe is located on one side of the end cap. The conveying pipe has a vertical pipe with a pulp inlet at its upper end and a curved pipe extending towards the inner wall of the pulp tank at its lower end. The lower end of the curved pipe is located below the liquid surface of the pulp, forming a pulp outlet. The advantages are: the curved pipe of the conveying pipe uses a 45-degree bend design and extends towards the inner wall of the tank. Combined with the layout of the pulp outlet located below the liquid surface, this allows the pulp to flow along a predetermined trajectory towards the inner wall when entering the tank, avoiding splashing and adhesion caused by the high-speed impact of pulp on the inner wall in traditional direct-injection conveying systems.

Description

Technical Field

[0001] This utility model belongs to the technical field of pulp forming tank pipe equipment, specifically relating to an improved structure of a pulp forming tank pipe for high-speed paper machine pulp preparation. Background Technology

[0002] The mixing tank and the forming tank are the starting points of the papermaking workshop. Pulp is sent from the pulp preparation stage to the mixing tank for mixing, and then pumped to the forming tank by a mixing pump. High-speed paper machines, to reduce paper breaks, generally use stainless steel circular tanks instead of traditional cement tanks, aiming to reduce paper breaks caused by sand and gravel impurities in the pulp system. In existing technology, the pulp is typically introduced into the forming tank from the top of the tank. However, in this method, the pipe outlet is mostly above the liquid level. Pulp rushing out of the pipe causes splashing inside the tank, forming residue on the inner walls and top of the tank. As pump speed and flow rate increase, this residue problem worsens, eventually leading to a large amount of corrosive pulp that can fall into the system, causing paper breaks and affecting paper machine operation. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing an improved structure for the pulp forming tank pipe used in high-speed paper machine pulp preparation.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: an improved structure for a pulp tank pipe in a high-speed paper machine pulp preparation area, comprising a pulp tank mounted on a tank base for storing pulp liquid, a tank end cap at the upper end of the pulp tank, an overflow port on the outer circumference of the upper end of the pulp tank, and a conveying pulp pipe on one side of the tank end cap. The conveying pulp pipe has a vertical pipe that penetrates the tank end cap and extends into the pulp tank. The upper end of the vertical pipe forms a pulp pipe inlet, and the lower end of the vertical pipe is connected to a curved pipe that extends towards the inner wall of the pulp tank. The lower end of the curved pipe is located below the surface of the pulp liquid and forms a pulp pipe outlet. The curved pipe extending towards the inner wall of the pulp tank and the outlet being located below the liquid surface guides the pulp to flow towards the inner wall below the liquid surface, preventing the pulp from directly impacting the liquid surface and splashing onto the tank wall to form adhering material. At the same time, this directional conveying method can reduce irregular collisions between the pulp and the tank wall, reducing the probability of pulp adhering to the tank wall.

[0005] In the aforementioned improved structure of the pulp tank pipe for high-speed paper machine pulp preparation, the vertical pipe is vertically arranged, and a pulp pipe connector is provided at the pulp pipe inlet at the upper end of the vertical pipe. The vertical arrangement of the vertical pipe ensures stable pulp delivery and avoids pulp flow disturbance and splashing onto the tank wall due to pipe inclination. The pulp pipe connector facilitates connection with external pipes, ensures the sealing of pulp delivery, and reduces pulp leakage to the tank wall, thus reducing material buildup.

[0006] In the aforementioned improved structure of the pulp forming tank pipe for high-speed paper machine pulp preparation, the curved pipe is a 45-degree elbow, and the curved pipe and the vertical pipe can be detachably connected or integrated into a single structure. The 45-degree elbow design can smoothly change the flow direction of the pulp, avoiding sudden changes in pulp velocity within the pipe due to excessive angle, which could impact the tank wall. The detachable connection facilitates cleaning of the curved pipe, preventing residual pulp from adhering to the tank wall during subsequent conveying. The integrated structure reduces gaps at the connection points, preventing pulp residue at these gaps from dripping onto the tank wall and forming a hanging residue.

[0007] In the aforementioned improved structure of the pulp forming tank pipe for high-speed paper machine pulp preparation, the diameter of the vertical pipe and the diameter of the curved pipe are equal. Equal diameters ensure a stable pulp flow rate during transport, preventing turbulence caused by pipe diameter changes, thus reducing the risk of pulp splashing onto the tank wall due to turbulence and lowering the risk of material buildup.

[0008] In the aforementioned improved structure of the pulp tank tube for high-speed paper machine pulp preparation, a flow divider is provided on the outer side of the curved tube away from the vertical tube. The flow divider has a fan-shaped structure, with one end having a pulp tube connection portion connected to the curved tube, and the other end having a fan-shaped flow divider portion away from the pulp tube connection portion. The fan-shaped flow divider portion also has a flow outlet portion at the other end. The fan-shaped flow divider is adapted to the shape of the inner wall of the pulp tank, guiding the pulp to flow smoothly along the tank wall and preventing direct impact on the tank wall. The pulp tube connection portion is connected to the curved tube, ensuring the continuity of pulp delivery and reducing pulp leakage at the connection point.

[0009] In the aforementioned improved structure of the pulp forming tank pipe for high-speed paper machine pulp preparation, the inner side of the fan-shaped diversion section is provided with several circumferentially evenly distributed diversion plates. Each diversion plate has a diversion channel on both sides, and each diversion channel corresponds one-to-one with a diversion outlet. The several circumferentially evenly distributed diversion plates divide the pulp into multiple uniform diversion channels, allowing the pulp to flow more evenly towards the tank wall, avoiding excessive local concentration of pulp that could impact the tank wall and cause sticking. The one-to-one correspondence between the diversion channels and the diversion outlets ensures the orderly delivery of the pulp, further reducing sticking.

[0010] In the aforementioned improved structure of the pulp tank tube for high-speed paper machine pulp preparation, a buffer plate is provided at the end of the diversion outlet furthest from the fan-shaped diversion section. Fixing rods connected to the four corners of the buffer plate are respectively provided on the outer periphery of the diversion outlet, and the opening of the diversion outlet corresponds to the buffer plate. The buffer plate buffers the pulp flowing from the diversion outlet, reducing the impact force of the pulp and preventing it from splashing onto the tank wall and forming residue due to excessive impact. The fixing rods secure the buffer plate, ensuring its stability and maintaining a continuous and effective buffering effect.

[0011] In the aforementioned improved structure of the pulp forming tank pipe for high-speed paper machine pulp preparation, the lower end of the buffer plate is inclined towards the inner wall of the pulp tank, and the length of the fixing rod at the upper end of the buffer plate is shorter than the length of the fixing rod at the lower end of the buffer plate. The inclination of the lower end of the buffer plate towards the inner wall of the pulp tank guides the buffered pulp to flow slowly down the tank wall, preventing the pulp from flowing randomly and adhering to the tank wall.

[0012] In the aforementioned improved structure of the pulp tank pipe for high-speed paper machine pulp preparation, a vertically arranged nozzle telescopic rod is provided on the inner side of the middle part of the tank end cover. A rotating nozzle is connected to the lower end of the nozzle telescopic rod, and the rotating nozzle is equipped with several nozzles at different angles. The nozzle telescopic rod can adjust the height of the rotating nozzle, and the several nozzles at different angles of the rotating nozzle can perform all-round, multi-angle cleaning of the inner wall of the tank, promptly removing any material buildup on the tank wall and keeping the tank wall clean.

[0013] In the above-mentioned improved structure of the pulp forming tank pipe for high-speed paper machine pulp preparation, the length of the vertical pipe is 1-1.5m.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] 1. The conveying pipe of this device adopts a 45-degree bend design and extends towards the inner wall of the tank. Combined with the layout of the slurry outlet located below the liquid surface, the slurry flows along a preset trajectory to the inner wall when entering the tank, avoiding splashing and adhesion caused by the high-speed impact of the slurry on the inner wall in traditional direct injection conveying.

[0016] 2. The fan-shaped diverter at the end of the curved tube of the device divides the slurry into multiple branches through evenly distributed diverter plates. The slurry is then orderly discharged through the diverter outlet, dispersing the impact force of the slurry on the inner wall. The buffer plate at the diverter outlet further receives the slurry. Its angle towards the inner wall allows the slurry to flow gently towards the inner wall along the inclined surface of the plate. The buffering effect weakens the adhesion kinetic energy of the slurry and avoids the accumulation of fibers and impurities on the wall surface caused by high-speed impact.

[0017] 3. The telescopic rod of the nozzle in the middle of the tank end cover of this device can be flexibly adjusted in height. With the multi-angle spray pipe of the rotating nozzle, it can perform all-round, no dead angle cleaning of the inner wall of the tank. When the equipment is stopped or during regular maintenance, the rotating nozzle can specifically flush the areas where material is easily stuck, remove the attached slurry in time, prevent the residual slurry from drying and forming stubborn material after scaling, reduce the difficulty of subsequent cleaning, and ensure the long-term cleanliness of the inner wall. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the slurry conveying pipe in this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the flow divider in this utility model.

[0021] Figure 4 This is a cross-sectional view of the flow divider in this utility model.

[0022] Figure 5 This is a structural cross-sectional view of the distributor seat from another perspective in this utility model.

[0023] In the diagram: 1. Tank base, 11. Slurry tank, 12. Tank end cover, 13. Overflow port, 2. Slurry conveying pipe, 21. Vertical pipe, 22. Slurry pipe inlet, 23. Bend pipe, 24. Slurry pipe outlet, 25. Slurry pipe joint, 3. Diverter seat, 31. Slurry pipe connection, 32. Fan-shaped diverter, 33. Diverter outlet, 34. Diverter plate, 35. Diverter channel, 36. Buffer plate, 37. Fixing rod, 4. Nozzle telescopic rod, 41. Rotating nozzle, 42. Spray pipe. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1-5 As shown, an improved structure for a pulp tank pipe for high-speed paper machine pulp preparation includes a pulp tank 11 mounted on a tank base 1 for storing pulp liquid. The pulp tank 11 has a tank end cap 12 at its upper end and an overflow port 13 on the outer circumference of the upper end of the pulp tank 11. A conveying pulp pipe 2 is provided on one side of the tank end cap 12. The conveying pulp pipe 2 has a vertical pipe 21 that penetrates the tank end cap 12 and extends into the pulp tank 11. The upper end of the vertical pipe 21 forms a pulp pipe inlet 22. The lower end of the vertical pipe 21 is connected to a curved pipe 23 that is bent and extends toward the inner wall of the pulp tank 11. The lower end of the curved pipe 23 is located below the liquid surface of the pulp liquid and forms a pulp pipe outlet 24. The curved pipe 23 extends toward the inner wall of the slurry tank 11 and its outlet is located below the liquid surface. This guides the slurry to flow toward the inner wall below the liquid surface, preventing the slurry from splashing onto the tank wall after directly impacting the liquid surface and forming a hanging material. At the same time, this directional conveying method can reduce irregular collisions between the slurry and the tank wall and reduce the probability of the slurry adhering to the tank wall.

[0026] Combination Figure 1 and Figure 2 As shown, the vertical pipe 21 is set vertically, and a slurry pipe connector 25 is provided at the slurry pipe inlet 22 at the upper end of the vertical pipe 21. The vertical setting of the vertical pipe 21 can ensure stable slurry delivery and avoid slurry flow disturbance caused by pipe inclination, which would splash onto the tank wall. The slurry pipe connector 25 is set to facilitate connection with external pipes, ensure the sealing of slurry delivery, and reduce slurry leakage to the tank wall and the resulting material buildup.

[0027] The curved pipe 23 is a 45-degree bend, and the curved pipe 23 and the vertical pipe 21 can be detached or integrated into a single structure. The 45-degree bend design can smoothly change the flow direction of the slurry, avoiding sudden changes in the flow velocity of the slurry in the pipe due to excessive angle, which could impact the tank wall. The detachable connection method facilitates cleaning of the curved pipe 23 and prevents residual slurry in the curved pipe 23 from adhering to the tank wall during subsequent transportation. The integrated structure reduces gaps at the connection, preventing slurry residue at the gaps from dripping onto the tank wall and forming a hanging residue.

[0028] Specifically, the diameter of the vertical pipe 21 is equal to the diameter of the curved pipe 23. Having equal diameters ensures a stable flow velocity of the slurry during transport, preventing turbulence caused by changes in pipe diameter. This reduces the likelihood of slurry splashing onto the tank wall due to turbulence, thus lowering the risk of material buildup.

[0029] Combination Figure 1 , Figures 3-5 As shown, a flow divider 3 is provided on the outer side of the curved pipe 23 away from the vertical pipe 21. The flow divider 3 has a fan-shaped structure. One end of the flow divider 3 has a slurry pipe connection part 31 connected to the curved pipe 23, and the other end of the flow divider 3 away from the slurry pipe connection part 31 has a fan-shaped flow divider part 32. The other end of the fan-shaped flow divider part 32 away from the slurry pipe connection part 31 has a flow divider outlet part 33. The fan-shaped flow divider 3 is adapted to the shape of the inner wall of the slurry tank 11, which can guide the slurry to flow smoothly along the tank wall and avoid the slurry directly impacting the tank wall. The slurry pipe connection part 31 is connected to the curved pipe 23, which ensures the continuity of slurry transportation and reduces slurry leakage at the connection.

[0030] The fan-shaped diversion section 32 has several circumferentially evenly distributed diversion plates 34 on its inner side. Each diversion plate 34 has a diversion channel 35 on both sides, and each diversion channel 35 corresponds to a diversion outlet 33. The several circumferentially evenly distributed diversion plates 34 divide the slurry into multiple uniform diversion channels 35, allowing the slurry to flow more evenly to the tank wall. This avoids excessive concentration of slurry in certain areas, which could impact the tank wall and cause material buildup. The one-to-one correspondence between the diversion channels 35 and the diversion outlets 33 ensures the orderly delivery of the slurry and further reduces material buildup.

[0031] Specifically, a buffer plate 36 is provided at the end of the diversion outlet 33 away from the fan-shaped diversion section 32. Fixing rods 37, connected to the four corners of the buffer plate 36, are provided on the outer periphery of the diversion outlet 33, and the opening of the diversion outlet 33 corresponds to the buffer plate 36. The buffer plate 36 buffers the slurry flowing out of the diversion outlet 33, reducing the impact force of the slurry and preventing it from splashing onto the tank wall and forming residue due to excessive impact. The fixing rods 37 fix the buffer plate 36, ensuring its stability and making the buffering effect continuous and effective.

[0032] Furthermore, the lower end of the buffer plate 36 is inclined towards the inner wall of the slurry tank 11, and the length of the fixing rod 37 at the upper end of the buffer plate 36 is shorter than the length of the fixing rod 37 at the lower end of the buffer plate 36. The inclination of the lower end of the buffer plate 36 towards the inner wall of the slurry tank 11 can guide the buffered slurry to flow slowly down the tank wall, preventing the slurry from flowing randomly and adhering to the tank wall.

[0033] Furthermore, a vertically arranged nozzle telescopic rod 4 is provided on the inner side of the middle of the tank end cover 12. The lower end of the nozzle telescopic rod 4 is connected to a rotating nozzle 41, and the rotating nozzle 41 is provided with several spray pipes 42 at different angles. The nozzle telescopic rod 4 can adjust the height of the rotating nozzle 41, and the several spray pipes 42 at different angles of the rotating nozzle 41 can clean the inner wall of the tank from all directions and multiple angles, promptly removing any material that may have formed on the tank wall and keeping the tank wall clean.

[0034] Meanwhile, the length of the vertical pipe 21 is 1-1.5m.

[0035] The principle of this embodiment is as follows:

[0036] The vertical pipe 21 of the slurry delivery pipe 2 vertically guides the external slurry into the tank, avoiding turbulent slurry flow caused by inclined pipes. The lower curved pipe 23 adopts a 45-degree bend design, smoothly changing the flow direction and extending towards the inner wall of the tank, so that the slurry flows in a predetermined trajectory when entering the tank, rather than randomly impacting the tank wall. The slurry outlet 24 of the curved pipe 21 is located below the slurry liquid surface, and the slurry enters the liquid directly, avoiding the splashing phenomenon caused by impacting the liquid surface when discharged above the liquid surface in the traditional way, reducing the possibility of slurry splashing onto the tank wall and forming slurry residue from the source. The diversion seat 3 at the end of the curved pipe 23 receives the slurry through the slurry pipe connection part 31, and the inner diversion plate 34 divides the concentrated slurry into multiple uniform branches, which are orderly discharged from the diversion outlet 33 through the diversion channel 35. The diversion design divides the originally single high-velocity slurry The material flow is dispersed into multiple low-impact branches, avoiding adhesion caused by excessively high local slurry concentration and flow rate, which would otherwise impact the tank wall. At the same time, it increases the contact area between the slurry and the original slurry in the tank, reducing the chance of slurry stagnation on the tank wall. The buffer plate 36 corresponding to the diversion outlet 33 directly receives the discharged slurry, and the plate body reduces the slurry flow rate and weakens its kinetic energy impacting the tank wall. The lower end of the buffer plate 36 is inclined towards the tank wall, guiding the buffered slurry to flow gently towards the tank wall along the slope, rather than impacting it vertically. The nozzle telescopic rod 4 inside the tank end cover 12 can be flexibly adjusted in height to adapt to different cleaning positions. The rotating nozzle 41 at its lower end sprays cleaning water or other cleaning media through the multi-angle spray pipe 42, which washes the inner wall of the tank in all directions during the rotation process, preventing residual slurry from drying and forming stubborn deposits.

[0037] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0038] Although this document frequently uses terms such as tank base 1, slurry tank 11, tank end cover 12, overflow port 13, slurry conveying pipe 2, vertical pipe 21, slurry pipe inlet 22, curved pipe 23, slurry pipe outlet 24, slurry pipe joint 25, flow divider 3, slurry pipe connection 31, fan-shaped flow divider 32, flow divider outlet 33, flow divider plate 34, flow divider channel 35, buffer plate 36, fixing rod 37, nozzle telescopic rod 4, rotating nozzle 41, and nozzle 42, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An improved structure for a pulp tank pipe in a high-speed paper machine, comprising a pulp tank (11) mounted on a tank base (1) for storing pulp liquid, wherein the upper end of the pulp tank (11) is provided with a tank end cap (12), and the upper end of the pulp tank (11) is provided with an overflow port (13) circumferentially outward, characterized in that, The tank end cap (12) is provided with a slurry conveying pipe (2) on one side. The slurry conveying pipe (2) has a vertical pipe (21) that penetrates the tank end cap (12) and extends into the slurry tank (11). The upper end of the vertical pipe (21) forms a slurry pipe inlet (22). The lower end of the vertical pipe (21) is connected to a curved pipe (23) that is bent and extends toward the inner wall of the slurry tank (11). The lower end of the curved pipe (23) is located below the liquid surface of the slurry and forms a slurry pipe outlet (24).

2. A slurry pipe improvement structure for a slurry tank of a high-speed paper machine according to claim 1, characterized in that, The vertical pipe (21) is set vertically and a slurry pipe joint (25) is provided at the slurry pipe inlet (22) at the upper end of the vertical pipe (21).

3. A slurry pipe improvement structure for a slurry tank of a high-speed paper machine according to claim 1, characterized in that, The bent pipe (23) is a 45-degree bend, and the bent pipe (23) and the vertical pipe (21) can be detachably connected or connected as an integral structure.

4. A slurry pipe improvement structure for a slurry tank of a high-speed paper machine according to claim 1, wherein The diameter of the vertical tube (21) is equal to the diameter of the curved tube (23).

5. A slurry pipe improvement structure for a slurry tank of a high-speed paper machine according to claim 1, wherein The curved pipe (23) is provided with a diversion seat (3) on the outer side of the end away from the vertical pipe (21). The diversion seat (3) has a fan-shaped structure. One end of the diversion seat (3) has a slurry pipe connection part (31) connected to the curved pipe (23). The end of the diversion seat (3) away from the slurry pipe connection part (31) has a fan-shaped diversion part (32), and the end of the fan-shaped diversion part (32) away from the slurry pipe connection part (31) has a diversion outlet part (33).

6. A slurry pipe improvement structure for a slurry tank of a high-speed paper machine according to claim 5, wherein The fan-shaped diversion section (32) has several diversion plates (34) evenly distributed in the circumference on its inner side. Each diversion plate (34) has a diversion channel (35) on both sides, and the diversion channel (35) corresponds to the diversion outlet section (33) one by one.

7. A high speed paper machine stock preparation system according to claim 5 wherein, The diversion outlet (33) is provided with a buffer plate (36) at the end away from the fan-shaped diversion section (32). The diversion outlet (33) is provided with fixing rods (37) connected to the four corners of the buffer plate (36) on the outer periphery. The opening of the diversion outlet (33) corresponds to the buffer plate (36).

8. A high speed paper machine stock preparation system according to claim 7, wherein, The lower end of the buffer plate (36) is inclined toward the inner wall of the slurry tank (11), and the length of the fixing rod (37) at the upper end of the buffer plate (36) is less than the length of the fixing rod (37) at the lower end of the buffer plate (36).

9. A high speed paper machine stock preparation system according to claim 1 wherein, The tank end cap (12) is provided with a vertically arranged nozzle telescopic rod (4) on the inner side of the middle. The lower end of the nozzle telescopic rod (4) is connected to a rotating nozzle (41), and the rotating nozzle (41) is provided with several nozzles (42) at different angles.

10. A slurry pipe improvement structure for a slurry tank of a high-speed paper machine according to claim 1, characterized in that, The length of the vertical pipe (21) is 1-1.5m.

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