A fiber mixing device for a headbox of a papermaking production

Abstract

The utility model belongs to papermaking production technical field especially relates to a kind of flow box fibre mixing device for papermaking production, including base, base top is equipped with rectifier, rectifier top surface middle part is equipped with pre-treatment device near left end, pre-treatment device is equipped with mixing device inside, mixing device includes processing structure and mixing structure, processing structure includes asynchronous motor, transmission part is connected to asynchronous motor output end, transmission part inside is equipped with stirring shaft, cutting knife is installed in the middle part of the outer surface of stirring shaft.The flow box fibre mixing device for papermaking production utilizes the cutting of cutting knife and the mixing of lower impeller, lower helical blade, upper impeller and upper helical blade, thereby effectively improving the mixing effect of pulp, utilizes the several holes and grooves opened on the outer surface of rectifying roller, thereby ensuring the vortex effect in the rectification process, effectively preventing the occurrence of fiber flocculation and precipitation phenomenon in pulp, and ensuring the production effect after pulp.

Description

Technical Field

[0001] This utility model relates to the field of papermaking production technology, specifically to a headbox fiber mixing device for papermaking production. Background Technology

[0002] The headbox is a crucial component of modern paper machines. Its structure and performance play a decisive role in sheet formation and paper quality. It effectively disperses fibers; a high-turbulence headbox generates high-intensity micro-turbulence, effectively dispersing fibers, preventing fiber sedimentation and re-flocculation, and significantly improving sheet strength; it ensures uniform distribution of the stock across the paper machine; and it provides stable pulp spraying, ensuring that the pulp speed is coordinated with the wire speed.

[0003] Existing headboxes are prone to separation of the upper and lower sections due to differences in buoyancy after the slurry is diluted, and also prone to separation due to insufficient flow velocity.

[0004] As disclosed in Chinese Patent CN212925598U, a fiber mixing device for papermaking using a headbox is described. A pulley is horizontally positioned in the middle of the headbox, and a base is positioned at the bottom of the headbox. Several downward spray pipes are evenly arranged on the top of the base. A water storage plate is located at the other end of each downward spray pipe. A lower main water inlet pipe is connected to the side of the water storage plate away from the downward spray pipes. A second water pump is located at the other end of the lower main water inlet pipe. The other end of the second water pump is connected to a water storage tank via a water pipe. Linear guide rails are symmetrically arranged on both sides of the top of the headbox. A first flushing pipe and a second flushing pipe are arranged on the two linear guide rails. Several connecting water pipes are welded between the first and second flushing pipes. Several upward spray pipes are evenly arranged at the bottom of the first flushing pipes. An upper main water inlet pipe is located in the middle of the side of the second flushing pipe away from the connecting water pipes. The other end of the upper main water inlet pipe is connected to the first water pump. The other end of the first water pump is connected to a water storage tank via a water pipe.

[0005] However, in the existing technology, when using a headbox to rectify and distribute pulp, fiber flocculation and sedimentation are prone to occur, which affects the papermaking effect. Furthermore, the existing headbox lacks a pretreatment device, which can easily affect the rectification effect of the headbox.

[0006] Therefore, we urgently need to provide a headbox fiber mixing device for papermaking production. Utility Model Content

[0007] The purpose of this utility model is to provide a fiber mixing device for a headbox in papermaking production, in order to solve the problem mentioned in the background art that fiber flocculation and sedimentation are easy to occur when using a headbox to rectify and distribute pulp, thereby affecting the papermaking effect. Furthermore, existing headboxes lack pretreatment devices, which easily affects the rectification effect of the headbox.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a headbox fiber mixing device for papermaking production, comprising a base, a rectifier installed on the top of the base, a pretreatment device installed near the left end of the top surface of the rectifier, and a mixing device installed inside the pretreatment device.

[0009] The mixing device includes a processing structure and a mixing structure, wherein the mixing structure is installed at the bottom and near the top of the processing structure.

[0010] The processing structure includes an asynchronous motor, the output end of which is connected to a transmission component. A stirring shaft is installed inside the transmission component, and a cutting blade is installed in the middle of the outer surface of the stirring shaft.

[0011] Preferably, the mixing structure includes a lower impeller, a lower spiral blade at the top of the lower impeller, an upper impeller at the top of the lower spiral blade, and an upper spiral blade at the bottom of the upper impeller.

[0012] Preferably, the lower impeller's top surface is connected to the bottom end of the stirring shaft at its center. The lower spiral blade, upper impeller, and upper spiral blade are mounted on the outer surface of the stirring shaft, with the upper impeller mounted near the top of the outer surface. The lower impeller and lower spiral blade are mirror images of the upper impeller and upper spiral blade. The transmission component is a worm gear with a worm wheel meshing on its outer surface. The worm gear is connected to the output end of an asynchronous motor, and the inside of the worm wheel is connected to the top of the stirring shaft.

[0013] Preferably, the pretreatment device includes a mixing tank, a feed hopper is installed at the middle of the top surface of the mixing tank near the right end, a liquid inlet pipe is installed at the middle of the left side of the outer surface of the mixing tank near the top, and a connecting pipe is installed at the middle of the bottom surface of the mixing tank.

[0014] Preferably, the top surface of the mixing tank is detachably connected to the bottom surface of the asynchronous motor, the middle part of the top surface of the mixing tank is connected to the outer surface of the stirring shaft through a bearing, and the inner bottom surface of the mixing tank is slidably connected to the bottom surface of the lower impeller.

[0015] Preferably, the rectifying device includes a headbox, a rotary motor is mounted on the front of the headbox, a linkage is connected to the output end of the rotary motor, and a rectifying roller is mounted in the middle of the linkage.

[0016] The discharge pipe is installed at the right end of the headbox.

[0017] Preferably, the top surface of the headbox is fixedly connected to the bottom of the mixing tank near the left end, and a circular hole is opened in the top surface of the mixing tank near the left end, which is fixedly connected to the bottom end of the outer surface of the connecting pipe. The two ends of the outer surface of the rectifier roller are connected to the front and back center of the headbox through sealed bearings. The outer surface of the rectifier roller has several holes and slots, and the linkage is a belt drive connection between the driving wheel, the belt, and the driven wheel.

[0018] Compared with the prior art, the beneficial effects of this utility model are: 1. The fiber mixing device for papermaking headbox, through the setting of the mixing device, utilizes the cutting of the cutting blade and the mixing of the lower impeller, lower spiral blade, upper impeller and upper spiral blade, thereby effectively improving the mixing effect of the pulp.

[0019] 2. This fiber mixing device for papermaking headbox, through the setting of the rectification device and the use of several holes and grooves opened on the outer surface of the rectification roller, ensures the eddy current effect during the rectification process, effectively prevents fiber flocculation and sedimentation in the pulp, and ensures the effect of subsequent production of the pulp. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is an enlarged view of the pretreatment device of this utility model;

[0022] Figure 3 is an enlarged view of the mixing device of this utility model;

[0023] Figure 4 is an enlarged view of the internal structure of the rectifier device of this utility model;

[0024] Figure 5 is an enlarged view of the rectifier structure of this utility model.

[0025] In the diagram: 1. Base; 101. Mixing tank; 102. Feed hopper; 103. Liquid inlet pipe; 104. Connecting pipe; 201. Asynchronous motor; 202. Transmission component; 203. Stirring shaft; 204. Cutting blade; 205. Lower impeller; 206. Lower spiral blade; 207. Upper impeller; 208. Upper spiral blade; 301. Headbox; 302. Rotary motor; 303. Linkage component; 304. Rectifying roller; 305. Discharge pipe. Detailed Implementation

[0026] 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 a part of the present utility model.

[0027] These are some examples, not all examples. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0028] Example 1:

[0029] In existing technologies, fiber flocculation and sedimentation easily occur when using a headbox to rectify and distribute pulp, thus affecting the papermaking effect. Furthermore, existing headboxes lack pretreatment devices, which further affects the rectification effect. Referring to Figures 1-3, this embodiment provides a fiber mixing device for a papermaking headbox, which effectively improves the pretreatment, mixing, and shearing effects of the pulp. This fiber mixing device for papermaking includes a base 1, a rectification device mounted on the top of the base 1, a pretreatment device mounted near the left end of the top surface of the rectification device, and a mixing device installed inside the pretreatment device.

[0030] The mixing device includes a processing structure and a mixing structure, with the mixing structure installed at the bottom and near the top of the processing structure. The processing structure includes an asynchronous motor 201, the output end of which is connected to a transmission component 202. A stirring shaft 203 is installed inside the transmission component 202, and a cutting blade 204 is installed in the middle of the outer surface of the stirring shaft 203.

[0031] The mixing structure includes a lower impeller 205, a lower spiral blade 206 at the top of the lower impeller 205, an upper impeller 207 at the top of the lower spiral blade 206, and an upper spiral blade 208 at the bottom of the upper impeller 207.

[0032] The lower impeller 205 is connected to the bottom end of the stirring shaft 203 at the middle of its top surface. The lower spiral blade 206, the upper impeller 207, and the upper spiral blade 208 are installed on the outer surface of the stirring shaft 203. The upper impeller 207 is installed on the outer surface of the stirring shaft 203 near the top.

[0033] The pretreatment device includes a mixing tank 101. A feed hopper 102 is installed on the middle of the top surface of the mixing tank 101 near the right end. A liquid inlet pipe 103 is installed on the middle of the left side of the outer surface of the mixing tank 101 near the top. A connecting pipe 104 is installed on the middle of the bottom surface of the mixing tank 101. The top surface of the mixing tank 101 is detachably connected to the bottom surface of the asynchronous motor 201. The middle of the top surface of the mixing tank 101 is connected to the outer surface of the stirring shaft 203 via a bearing. The inner bottom surface of the mixing tank 101 is slidably connected to the bottom surface of the lower impeller 205.

[0034] By using the mixing device, the cutting of the cutting blade 204, and the lower impeller 205 and lower spiral blade, the mixing is achieved.

[0035] The mixing of materials by 206, 207, and 208 of the upper impeller and upper spiral blade effectively improves the mixing effect of the slurry.

[0036] The pulp is prevented from entering the mixing tank 101 by feeding hopper 102, while dispersant is delivered into the mixing tank 101 through liquid inlet pipe 103, thus effectively preventing flocculation and sedimentation of the pulp. Then, the asynchronous motor 201 is started to drive the transmission component 202 for transmission. The output end of the asynchronous motor 201 drives the worm to rotate. The outer surface of the worm is meshed with the worm wheel, and the middle part of the worm wheel is connected to the top of the stirring shaft 203. Thus, the stirring shaft 203 drives the cutting blade 204 to rotate, crushing the pulp and breaking up the fibers. At the same time, the stirring shaft 203 drives the lower impeller 205 and the lower spiral blade 206 to rotate, and the stirring shaft 203 drives the upper impeller 207 and the upper spiral blade 208 to rotate. The lower impeller 205 and the lower spiral blade 206 are mirror images of the upper impeller 207 and the upper spiral blade 208, so that the pulp flows against each other and mixes, ensuring the uniformity of the pulp.

[0037] Example 2:

[0038] Based on Implementation 1, the existing technology still has the problem of fiber flocculation in the pulp during the rectification process. Referring to Figures 4-5, this embodiment provides a headbox fiber mixing device for papermaking, which can effectively solve the problem of fiber flocculation in the pulp during the rectification process. This headbox fiber mixing device for papermaking includes a rectification device including a headbox body 301. A rotary motor 302 is installed on the front of the headbox body 301. A linkage 303 is connected to the output end of the rotary motor 302. A rectification roller 304 is installed in the middle of the linkage 303. A discharge pipe 305 is installed on the right end of the headbox body 301. The middle of the top surface of the headbox body 301 near the left end is fixedly connected to the bottom of the mixing tank 101. A circular hole is opened in the middle of the top surface of the mixing tank 101 near the left end, and the inside is fixedly connected to the bottom end of the outer surface of the connecting pipe 104. The two ends of the outer surface of the rectification roller 304 are connected to the middle of the front and back sides of the headbox body 301 through sealed bearings.

[0039] By setting up a rectifier device and utilizing several holes and grooves on the outer surface of the rectifier roller 304, the eddy current effect during the rectification process is ensured, effectively preventing fiber flocculation and sedimentation in the slurry and ensuring the effect of subsequent slurry production.

[0040] After mixing, the slurry enters the headbox 301 through the connecting pipe 104. The rotary motor 302 is started, driving the linkage 303 for transmission. The output of the rotary motor 302 drives the drive wheel to rotate.

[0041] The belt drives the driven pulley to rotate the two rectifier rollers 304 simultaneously. Since the outer surface of the rectifier rollers 304 has several holes and grooves, the pulp is vortexed during the rectification process. The vortex is used to reduce the flocculation of fibers in the pulp and improve the effect of subsequent papermaking.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A headbox fiber mixing device for papermaking production, comprising a base (1), characterized in that: A rectifier is installed on the top of the base (1), and a pretreatment device is installed in the middle of the top surface of the rectifier near the left end. A mixing device is installed inside the pretreatment device. The mixing device includes a processing structure and a mixing structure, wherein the mixing structure is installed at the bottom and near the top of the processing structure. The processing structure includes an asynchronous motor (201), the output end of which is connected to a transmission component (202), a stirring shaft (203) is installed inside the transmission component (202), and a cutting blade (204) is installed in the middle of the outer surface of the stirring shaft (203).

2. The headbox fiber mixing device for papermaking production according to claim 1, characterized in that: The mixing structure includes a lower impeller (205), a lower spiral blade (206) is provided at the top of the lower impeller (205), an upper impeller (207) is provided at the top of the lower spiral blade (206), and an upper spiral blade (208) is provided at the bottom of the upper impeller (207).

3. The headbox fiber mixing device for papermaking production according to claim 2, characterized in that: The lower impeller (205) is connected to the bottom end of the stirring shaft (203) at the middle of its top surface. The lower spiral blade (206), upper impeller (207), and upper spiral blade (208) are installed on the outer surface of the stirring shaft (203). The upper impeller (207) is installed on the outer surface of the stirring shaft (203) near the top.

4. The headbox fiber mixing device for papermaking production according to claim 1, characterized in that: The pretreatment device includes a mixing tank (101), a feeding hopper (102) is installed in the middle of the top surface of the mixing tank (101) near the right end, a liquid inlet pipe (103) is installed in the middle of the left side of the outer surface of the mixing tank (101) near the top, and a connecting pipe (104) is installed in the middle of the bottom surface of the mixing tank (101).

5. A headbox fiber mixing device for papermaking production according to claim 4, characterized in that: The top surface of the mixing tank (101) is detachably connected to the bottom surface of the asynchronous motor (201). The middle part of the top surface of the mixing tank (101) is connected to the outer surface of the stirring shaft (203) through a bearing. The bottom surface inside the mixing tank (101) is slidably connected to the bottom surface of the lower impeller (205).

6. The headbox fiber mixing device for papermaking production according to claim 1, characterized in that: The rectifying device includes a headbox (301), a rotary motor (302) is mounted on the front of the headbox (301), a linkage (303) is connected to the output end of the rotary motor (302), a rectifying roller (304) is mounted in the middle of the linkage (303), and a discharge pipe (305) is mounted on the right end of the headbox (301).

7. A headbox fiber mixing device for papermaking production according to claim 6, characterized in that: The top surface of the headbox (301) is fixedly connected to the bottom of the mixing tank (101) near the left end. The mixing tank (101) has a round hole in the top surface near the left end, which is fixedly connected to the bottom end of the outer surface of the connecting pipe (104). The two ends of the outer surface of the rectifier roller (304) are connected to the front and back center of the headbox (301) through sealed bearings.

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