An additive adding device for paper manufacturing

Abstract

The utility model relates to paper manufacturing technical field especially relates to an additive adding device for paper manufacturing, its technical scheme includes: the top of material pipe is equipped with top cap, the bottom of material pipe is equipped with bottom cap, the inside installation of material pipe has the baffle, be equipped with through -hole and guide groove on the baffle, the inside of material pipe is separated into multiple accommodating cavities through multiple baffles, and the sealed ball is placed in the accommodating cavity, the density of sealed ball is less than the density of liquid additive in material pipe, the through -hole of the baffle of accommodating cavity top is used for plugging when sealed ball floats up. The utility model discloses through the multistage baffle in material pipe separates the accommodating cavity, utilizes the characteristic that the density of sealed ball is less than liquid additive, makes it float up and plugs the through -hole and realizes the layered sealing. The volume can be flexibly adjusted by screw adjusting baffle position, recessed guide groove guides sealed ball accurate movement, has the automatic control flow and the advantage of convenient maintenance, improves additive adding precision and process adaptability.

Description

Technical Field

[0001] This utility model relates to the field of paper manufacturing technology, and specifically to an additive adding device for paper manufacturing. Background Technology

[0002] In the papermaking process, paper quality is improved by adding additives such as wet strength agents, filter aids, deinking agents, surface treatment agents, and starch curing agents to the pulp.

[0003] A search revealed that patent application CN201120053411.9 discloses a novel papermaking additive addition device, which achieves multi-point injection by evenly distributing multiple additive channels around the circumference of the pulping pipe. Although this device improves the mixing effect by setting nozzles during use, it cannot achieve precise control of additive layering. When dealing with multi-component processes requiring different addition sequences, it is prone to uneven mixing or reaction interference. Furthermore, it lacks dynamic flow rate adjustment capabilities, making it difficult to adapt to the flexible adjustment requirements of additive ratios for different paper types. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an additive application device for paper manufacturing, which solves the problems mentioned in the background art.

[0005] The solution to the above-mentioned technical problems provided by this utility model is as follows:

[0006] An additive application device for paper manufacturing includes a feed tube, with a top cover at the top end of the feed tube and a bottom cover at the bottom end of the feed tube.

[0007] The inside of the feed tube is equipped with a partition plate, which has through holes and guide grooves. The feed tube is divided into multiple receiving cavities by multiple partition plates, and a sealing ball is placed in each receiving cavity. The density of the sealing ball is less than that of the liquid additive in the feed tube. When the sealing ball floats up, it is used to block the through holes of the partition plate at the top of the receiving cavity.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the material tube has an inlet and an outlet at both ends, and the top cover and bottom cover are respectively installed on the inlet and outlet.

[0010] The beneficial effects of adopting the above-mentioned further solutions are:

[0011] By setting inlet and outlet ports at both ends of the feed pipe, and equipping it with detachable top and bottom covers, a closed conveying channel is formed. This facilitates the injection and discharge of additives while effectively preventing the ingress of external impurities or leakage of internal liquids. The sealing connection design of the top and bottom covers can adopt threaded engagement, snap-locking, or other methods (specific details to be determined with reference to the attached drawings), ensuring that the device maintains structural stability under high pressure or vibration environments, making it particularly suitable for the complex production conditions in paper mills.

[0012] Furthermore, the feed tube is threaded, and the partition is installed inside the feed tube through thread engagement, and the position of the partition is adjusted by the thread.

[0013] The beneficial effects of adopting the above-mentioned further solutions are:

[0014] The threaded engagement structure allows for precise positioning of the baffles along the feed tube axis. Rotating the baffles changes their position within the feed tube, enabling stepless adjustment of the cavity volume. This design allows operators to quickly adjust the baffle spacing based on actual additive usage requirements (such as differences in the ratio of sizing agents and reinforcing agents for different paper types) without replacing parts, significantly improving the equipment's process adaptability. Simultaneously, the threaded connection has a self-locking function, effectively preventing baffle displacement under liquid flow impact and ensuring long-term operational stability.

[0015] Furthermore, both ends of the partition are concave, and the guide groove is located at the center of the concave surface.

[0016] The beneficial effects of adopting the above-mentioned further solutions are:

[0017] The combination of the concave structure and the guide groove creates a fluid dynamics guidance path. When the liquid additive flows between adjacent cavities, the concave surface reduces flow resistance, minimizes turbulence and eddies, and ensures the additive passes smoothly through the through-hole. Simultaneously, during the rising of the sealing ball, the inclination angle of the concave surface provides radial guiding force, allowing the sealing ball to fall more accurately into the through-hole for sealing. Furthermore, the concave structure effectively disperses the impact force of the liquid on the baffle, extending its service life.

[0018] Furthermore, the guide groove is used to guide the sealing ball, so that the sealing ball is guided to move to the through hole, and the guide groove is used to engage with the tool, so that the position of the partition can be adjusted by rotating the partition with the tool.

[0019] The beneficial effects of adopting the above-mentioned further solutions are:

[0020] The dual-function design of the guide groove achieves structural reuse and simplified operation. In terms of sealing, its smooth, tapered inner wall effectively guides the sealing ball to precisely move to the through-hole position, significantly reducing lateral offset errors and ensuring reliable sealing under different flow conditions. Regarding installation and maintenance, the standard-sized polygonal guide groove (such as a hexagon) can be directly used with common tools, allowing operators to quickly adjust the baffle position without disassembling the feed pipe. Compared to traditional bolt fixing methods, this significantly shortens adjustment time and greatly improves production efficiency.

[0021] This invention provides an additive application device for paper manufacturing. It has the following beneficial effects:

[0022] The feed tube is divided into multiple receiving chambers by baffles, and each receiving chamber contains a sealing ball. The sealing ball has a lower density than the liquid additive. When the liquid flows from bottom to top, the sealing ball floats up and blocks the through holes of the upper baffle, forming a multi-stage unidirectional sealing structure to prevent the additive from flowing backward or mixing.

[0023] The sealing ball automatically responds to changes in liquid level through buoyancy, requiring no additional power unit. When a certain layer of the chamber is filled with liquid, the sealing ball floats up and blocks the through-hole, preventing liquid from continuing to flow into the upper layer, thus achieving automatic stratification control.

[0024] The baffles are installed via threads inside the feed tube and their position (such as spacing and number of layers) can be adjusted by rotation to flexibly adapt to the additive dosage requirements of different processes. This also facilitates increasing or decreasing the number of receiving cavities or independently disassembling individual baffles for cleaning and maintenance. The baffles have concave sides, and the central guide groove serves a dual function: firstly, it guides the sealing ball to move precisely to the through-hole, ensuring a tight seal and reducing the risk of leakage due to misalignment; secondly, it can be engaged with a special tool, allowing operators to quickly rotate the baffles and precisely control the installation torque and position, avoiding errors from manual adjustment. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0026] In the attached diagram:

[0027] Figure 1 This is a schematic diagram of the main appearance of the present utility model;

[0028] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0029] Figure 3 This is a schematic diagram of the partition of this utility model.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1. Top cover; 2. Material pipe; 201. Inlet; 202. Thread; 203. Receiving cavity; 204. Grate; 205. Outlet; 3. Bottom cover; 4. Partition; 401. Through hole; 402. Guide groove; 5. Sealing ball. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figures 1 to 3 As shown, the embodiments provided by this utility model are as follows:

[0034] Example 1

[0035] An additive adding device for paper manufacturing includes a feed pipe 2, a top cover 1 at the top end of the feed pipe 2, a bottom cover 3 at the bottom end of the feed pipe 2, an inlet 201 and an outlet 205 at both ends of the feed pipe 2, a grate 204 at the outlet 205, and the top cover 1 and the bottom cover 3 are respectively installed on the inlet 201 and the outlet 205. By setting the inlet 201 and the outlet 205 at both ends of the feed pipe 2 and equipping it with the detachable top cover 1 and the bottom cover 3, a closed conveying channel is formed, which facilitates the injection and discharge of additives and effectively prevents external impurities from mixing in or internal liquid from leaking. The sealing connection design of the top cover 1 and the bottom cover 3 can adopt the screw thread 202 screw engagement, snap locking and other methods (specific details to be determined with reference to the attached drawings) to ensure that the device can maintain structural stability under high pressure or vibration environment. It is especially suitable for the complex production conditions in papermaking workshops. The inside of the material pipe 2 is equipped with a partition 4. The partition 4 is provided with a through hole 401 and a guide groove 402. The material pipe 2 is divided into multiple receiving cavities 203 by multiple partitions 4. A sealing ball 5 is placed in the receiving cavity 203. The density of the sealing ball 5 is less than the density of the liquid additive in the material pipe 2. When the sealing ball 5 floats up, it is used to block the through hole 401 of the partition 4 at the top of the receiving cavity 203.

[0036] Example 2

[0037] To further optimize the performance of additive addition devices for paper manufacturing and improve their adaptability and reliability in actual production, for example, such as Figures 1 to 3As shown, this utility model also includes: a thread 202 is provided inside the feed tube 2, and a partition 4 is installed inside the feed tube 2 through the thread 202 engagement. The position of the partition 4 is adjusted through the thread 202. The thread 202 engagement structure allows the partition 4 to be precisely positioned along the axial direction of the feed tube 2. By rotating the partition 4, its position inside the feed tube 2 can be changed, realizing stepless adjustment of the volume of the receiving cavity 203. This design allows operators to quickly adjust the spacing of the partition 4 according to the actual dosage requirements of the additives (such as the difference in the ratio of sizing agent and reinforcing agent for different paper types) without replacing parts, significantly improving the process adaptability of the device. At the same time, the thread 202 connection has a self-locking function, which can effectively prevent the partition 4 from shifting under the impact of liquid flow, ensuring long-term operational stability. Both end faces of the partition 4 are concave, and the guide groove 402 is located at the center of the concave surface. The combination design of the concave surface structure and the guide groove 402 forms a fluid dynamic guidance path. When the liquid additive flows between adjacent receiving cavities 203, the concave surface reduces flow resistance, minimizes turbulence and eddies, and ensures the additive passes smoothly through the through-hole 401. Simultaneously, during the upward movement of the sealing ball 5, the inclination angle of the concave surface provides radial guiding force, allowing the sealing ball 5 to more accurately fall into the through-hole 401 for sealing. Furthermore, the concave structure effectively disperses the impact force of the liquid on the partition 4, extending its service life. The guide groove 402 guides the sealing ball 5, guiding it to the through-hole 401. The guide groove 402 also engages with a tool, allowing the partition 4 to be rotated using the tool to adjust its position. This dual-function design of the guide groove 402 achieves structural reuse and simplified operation. In terms of sealing function, its smooth inner wall conical design can effectively guide the sealing ball 5 to move precisely to the position of the through hole 401, significantly reducing lateral offset error and ensuring reliable sealing under different flow conditions. In terms of installation and maintenance, the standard-sized polygonal guide groove 402 (such as hexagon) can be directly used with general tools, and operators can quickly adjust the position of the baffle 4 without disassembling the material pipe 2. Compared with the traditional bolt fixing method, it greatly shortens the adjustment time and significantly improves production efficiency.

[0038] Working principle:

[0039] The operator can use a tool to engage the guide groove 402 in the center of the partition 4 and rotate the partition 4 to adjust its position within the material tube 2. Changing the spacing of the partitions 4 can adjust the volume of the receiving cavity 203, thereby controlling the amount of additive stored in each receiving cavity 203.

[0040] Liquid additives are injected through the inlet 201 of the feed pipe 2. Since the density of the sealing ball 5 is less than that of the additive liquid, the sealing ball 5 initially floats to the guide groove 402 on the concave surface of the partition 4 due to buoyancy, but it has not yet completely blocked the through hole 401 of the upper partition 4. At this time, the additives flow from bottom to top in the feed pipe 2 through the through holes 401 of each partition 4, and fill each receiving cavity 203 in sequence.

[0041] When the liquid level in a certain receiving cavity 203 rises to near the top baffle 4, the sealing ball 5 in that layer floats further upward under the action of buoyancy, precisely falling into the through hole 401 of the top baffle 4 to form a seal and prevent the liquid from continuing to flow upward. This process is achieved by guiding the movement of the sealing ball 5 through the guide groove 402 on the concave surface of the baffle 4, ensuring the reliability of the sealing effect. Different levels of receiving cavities 203 achieve sealing step by step according to this principle, forming a multi-stage unidirectional flow control.

[0042] When additives need to be added to the paper manufacturing process, the discharge port 205 of the bottom cover 3 is opened, and the additives in the feed tube 2 are released sequentially from bottom to top under the action of gravity. As the bottom liquid is discharged, the liquid level drops, and the sealing ball 5 falls back due to gravity, releasing the blockage of the through hole 401, allowing the upper liquid to continue flowing downward until the entire addition process is completed.

[0043] To meet the needs of different types of additives or paper production processes, various production scenarios can be flexibly adapted by replacing the sealing balls 5 with different densities (to adapt to different liquid densities), adjusting the number and spacing of the baffles 4 (changing the volume of the receiving cavity 203), or rotating the baffles 4 to change their installation angle (fine-tuning the flow resistance).

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An additive adding device for paper manufacturing, comprising a feed tube (2), wherein a top cover (1) is provided at the top end of the feed tube (2), and a bottom cover (3) is provided at the bottom end of the feed tube (2), characterized in that: The material tube (2) is equipped with a partition (4) inside. The partition (4) has a through hole (401) and a guide groove (402). The material tube (2) is divided into multiple receiving cavities (203) by multiple partitions (4). A sealing ball (5) is placed in the receiving cavity (203). The density of the sealing ball (5) is less than the density of the liquid additive in the material tube (2). When the sealing ball (5) floats up, it is used to block the through hole (401) of the partition (4) at the top of the receiving cavity (203).

2. The additive adding apparatus for paper manufacturing according to claim 1, characterized by: The material pipe (2) has an inlet (201) and an outlet (205) at both ends, and the top cover (1) and bottom cover (3) are respectively installed on the inlet (201) and the outlet (205).

3. The additive adding apparatus for paper manufacturing according to claim 1, characterized by: The material tube (2) is provided with a thread (202), and the partition (4) is installed in the material tube (2) by engaging with the thread (202), and the position of the partition (4) is adjusted by the thread (202).

4. The additive adding apparatus for paper manufacturing according to claim 1, characterized by: Both ends of the partition (4) are concave, and the guide groove (402) is located at the center of the concave surface.

5. The additive adding apparatus for paper manufacturing according to claim 1, characterized by: The guide groove (402) is used to guide the sealing ball (5) so that the sealing ball (5) is guided to move to the through hole (401), and the guide groove (402) is used to engage with the tool, and the position of the partition (4) is adjusted by rotating the partition (4) with the tool.

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