A papermaking pulp screening device

Abstract

The utility model relates to the technical field of slurry screening, specifically relates to a papermaking slurry screening device, including screening cylinder, still include the screening mechanism for to papermaking slurry screening, screening mechanism is located the inside of screening cylinder, and the upper end of water passage is installed with screen cloth, and the screen cloth is equipped with the cleaning structure for the cleaning of the residue left on the screen cloth surface between screening cylinder. Advantageous effects: after the full screening of slurry through screening mechanism, the cleaning structure is used to drive the rotation of screen cloth, the screen cloth surface is vibrated while rotating, the residue on the screen cloth surface is rubbed to a certain extent, the water in the residue is fully squeezed out, the residue left on the screen cloth surface is cleaned, the water recovery rate is improved, the possibility of residue blocking the screen cloth is reduced, the water permeability of the screen cloth is improved, and the filtering efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of pulp screening technology, and in particular to a paper pulp screening device. Background Technology

[0002] Paper is one of the most commonly used items in our daily lives. Whether we are reading books or newspapers, or writing or drawing, we have to come into contact with paper. Paper is a sheet-like fibrous product used for writing, printing, painting or packaging. It is generally made by combining an aqueous suspension of plant fibers that have undergone pulping treatment on a wire mesh, initially dehydrating, and then compressing and drying. In the papermaking process, in order to improve product quality, the pulp used for papermaking needs to be screened.

[0003] By comparing a papermaking fiber separation screen frame with patent publication number CN222990483U, in this solution, when the screen becomes clogged during the screening process, a striking device is used to drive the striking rod to rotate, thereby causing the striking rod to continuously strike the screen and vibrate it to prevent clogging. However, the screened residue will continue to remain on the screen surface, and the residue cannot be cleaned in time, which will repeatedly clog the screen. This reduces the screen's permeability and filtration efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a paper pulp screening device to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A paper pulp screening device includes a screening cylinder and a screening mechanism for screening the paper pulp, the screening mechanism being located inside the screening cylinder.

[0007] The screening mechanism includes a water passage chamber located at the upper end of the screening cylinder, a water leakage plate fixed at the bottom of the water passage chamber, a funnel fixed at the bottom of the water leakage plate, a drain pipe fixed at the bottom of the funnel, a solenoid valve installed on the drain pipe, a screen installed at the upper end of the water passage chamber, and a cleaning structure for cleaning residues remaining on the screen surface between the screen and the screening cylinder.

[0008] Preferred configuration: The cleaning structure includes a bottom frame fixedly mounted on the top of the drain plate, a rotating shaft rotatably mounted on the upper end of the bottom frame, a rotary motor mounted on the rotating end of the rotating shaft, the output end of the rotary motor being fixed to the rotating end of the rotating shaft via a coupling, a fixed plate fixed on the top of the rotating shaft, a fixed frame fixed at the center of the screen, the fixed frame being slidably connected to the fixed plate, a compression spring connecting the fixed plate and the fixed frame, the screen being slidably connected to the inner wall of the water passage chamber, the screen being a cone shape with the small end facing upwards, multiple slag discharge channels being provided on the side wall of the screening cylinder near the screen, and a vibration structure for driving the screen to float up and down between the screen and the water passage chamber.

[0009] Preferably, the vibration structure includes multiple upper protrusions arranged around the bottom edge of the screen, a connecting ring fixedly installed on the inner wall of the water passage cavity near the bottom of the screen, multiple lower protrusions fixedly arranged around the upper end of the connecting ring, the lower protrusions and the upper protrusions are both arc-shaped on the side closest to each other and slide in cooperation with each other, multiple keyways are arranged around the inner wall of the fixed frame, splines are slidably installed in the keyways, the splines are fixedly connected to the fixed plate, and a kneading structure is provided above the screen for kneading the residue on the screen surface.

[0010] Preferably, the kneading structure includes an extrusion plate disposed at the top of the screening cylinder. The extrusion plate is annular, and the bottom end of the extrusion plate and the side of the screen that are close to each other are both inclined surfaces, and there is a V-shaped angle between the two inclined surfaces with the opening facing the inside of the screening cylinder.

[0011] Preferably, multiple kneading strips are fixed around the inclined surface at the bottom end of the extrusion plate.

[0012] Preferred material: The kneading strip is made of silicone.

[0013] Preferably, the bottom of the screening cylinder is made of rubber.

[0014] Compared with existing technologies, the beneficial effects are as follows:

[0015] After the slurry is fully screened by the screening mechanism, the cleaning structure drives the screen to rotate. While the screen rotates, the screen surface is vibrated, and the residue on the screen surface is kneaded to a certain extent. This fully squeezes out the water inside the residue and cleans the residue remaining on the screen surface, improving the water recovery rate, reducing the possibility of residue clogging the screen, improving the screen's permeability, and improving the filtration efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a spatial perspective view of a paper pulp screening device according to the present invention;

[0018] Figure 2 This is a cross-sectional view of the internal structure of the screening cylinder of the paper pulp screening device described in this utility model;

[0019] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0020] Figure 4 This is a cross-sectional view of the internal structure of the fixed frame of the paper pulp screening device described in this utility model;

[0021] Figure 5 This is a partial structural diagram of the screen of a paper pulp screening device according to the present invention;

[0022] Figure 6 This is a schematic diagram of the structure between the extrusion plate and the connecting ring of the paper pulp screening device described in this utility model.

[0023] The annotations in the attached figures are explained as follows:

[0024] 100. Screening cylinder; 201. Screen; 202. Extrusion plate; 203. Kneading strip; 204. Connecting ring; 205. Lower protrusion; 206. Upper protrusion; 207. Water passage chamber; 208. Bottom frame; 209. Rotary motor; 210. Rotating shaft; 211. Fixed plate; 212. Spline; 213. Keyway; 214. Fixed frame; 215. Funnel; 216. Drain plate; 217. Drain pipe; 218. Solenoid valve; 219. Slag discharge channel. Detailed Implementation

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal connection of two components. All electrical components mentioned in this document are electrically connected to an external main controller and 220V AC mains power, and the main controller can be a conventionally known control device such as a computer. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] like Figures 1-6 As shown, a paper pulp screening device includes a screening cylinder 100 and a screening mechanism for screening paper pulp, the screening mechanism being located inside the screening cylinder 100.

[0028] In this embodiment: the screening mechanism includes a water passage chamber 207 disposed at the upper end of the screening cylinder 100, a water leakage plate 216 fixed at the bottom end of the water passage chamber 207, a funnel 215 fixed at the bottom end of the water leakage plate 216, a drain pipe 217 fixed at the bottom end of the funnel 215, a solenoid valve 218 installed on the drain pipe 217, a screen 201 installed at the upper end of the water passage chamber 207, the bottom end of the screening cylinder 100 is made of rubber, and a cleaning structure for cleaning residues remaining on the surface of the screen 201 is provided between the screen 201 and the screening cylinder 100.

[0029] The cleaning structure includes a bottom frame 208 fixedly mounted on the top of the drain plate 216. A rotating shaft 210 is rotatably mounted on the upper end of the bottom frame 208. A rotary motor 209 is mounted on the rotating end of the rotating shaft 210. The output end of the rotary motor 209 is fixed to the rotating end of the rotating shaft 210 through a coupling. A fixed plate 211 is fixed on the top of the rotating shaft 210. A fixed frame 214 is fixed at the center of the screen 201. The fixed frame 214 is slidably connected to the fixed plate 211. A compression spring is connected between the fixed plate 211 and the fixed frame 214. The screen 201 is slidably connected to the inner wall of the water passage chamber 207. The screen 201 is a cone with the small end facing upward. Multiple slag discharge channels 219 are opened on the side wall of the screening cylinder 100 near the screen 201. A vibration structure for driving the screen 201 to float up and down is provided between the screen 201 and the water passage chamber 207.

[0030] The vibration structure includes multiple upper protrusions 206 arranged around the bottom edge of the screen 201. A connecting ring 204 is fixedly installed on the inner wall of the water passage cavity 207 near the bottom of the screen 201. Multiple lower protrusions 205 are fixedly arranged around the upper end of the connecting ring 204. The lower protrusions 205 and the upper protrusions 206 are arc-shaped on the side close to each other and slide in cooperation with each other. Multiple keyways 213 are arranged around the inner wall of the fixed frame 214. Splines 212 are slidably installed in the keyways 213 and fixedly connected to the fixed plate 211. A kneading structure is provided above the screen 201 for kneading the residue on the surface of the screen 201.

[0031] The kneading structure includes an extrusion plate 202 at the top of the screening cylinder 100. The extrusion plate 202 is annular, and the bottom end of the extrusion plate 202 and the screen 201 are both inclined on the same side. There is a V-shaped angle between the two inclined surfaces with the opening facing the inside of the screening cylinder 100. Multiple kneading strips 203, made of silicone, are fixed around the inclined surface at the bottom end of the extrusion plate 202. After the slurry is fully screened by the screening mechanism, the cleaning structure drives the screen 201 to rotate. While the screen 201 is rotating, the surface of the screen 201 is vibrated, and the residue on the surface of the screen 201 is kneaded to a certain extent. The water inside the residue is fully squeezed out, and the residue remaining on the surface of the screen 201 is cleaned. This improves the water recovery rate, reduces the possibility of residue clogging the screen 201, improves the water permeability of the screen 201, and improves the filtration efficiency.

[0032] Working principle: First, the paper pulp is poured onto the surface of the screen 201. The rotary motor 209 is started to drive the rotating shaft 210 to rotate, which in turn drives the fixed frame 214 to rotate, thereby driving the screen 201 to rotate, thus screening the paper pulp on the surface of the screen 201. The screened water falls into the funnel 215 and is finally discharged out through the drain pipe 217.

[0033] The residue remaining on the screen 201 after screening will generate a certain centrifugal force as the screen 201 rotates, throwing the residue towards the edge of the screen 201. Then, the residue will be discharged outward through the slag discharge channel 219. While the screen 201 is rotating, the multiple upper protrusions 206 at the bottom of the screen 201 will press against the multiple lower protrusions 205 at the top of the connecting ring 204, causing the screen 201 to float up and down, producing a small amplitude vibration.

[0034] When the screen 201 floats up and down, the inclined surface of the screen 201 will press against the inclined surface of the extrusion plate 202. The V-shaped angle between the two inclined surfaces and the multiple kneading strips 203 on the inclined surface of the extrusion plate 202 will knead the residue to a certain extent, further squeezing out the water inside the residue, improving the water recovery rate, reducing the possibility of residue clogging the screen 201, improving the water permeability of the screen 201, and improving the filtration efficiency.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A papermaking stock screening device comprising a screening drum (100), characterized in that: It also includes a screening mechanism for screening paper pulp, the screening mechanism being located inside the screening cylinder (100); The screening mechanism includes a water passage chamber (207) located at the upper end of the screening cylinder (100). A water leakage plate (216) is fixed at the bottom end of the water passage chamber (207). A funnel (215) is fixed at the bottom end of the water leakage plate (216). A drain pipe (217) is fixed at the bottom end of the funnel (215). A solenoid valve (218) is installed on the drain pipe (217). A screen (201) is installed at the upper end of the water passage chamber (207). A cleaning structure for cleaning residues remaining on the surface of the screen (201) is provided between the screen (201) and the screening cylinder (100).

2. A paper stock screening apparatus according to claim 1, characterized in that: The cleaning structure includes a bottom frame (208) fixedly mounted on the top of the drain plate (216). A rotating shaft (210) is rotatably mounted on the upper end of the bottom frame (208). A rotary motor (209) is mounted on the rotating end of the rotating shaft (210). The output end of the rotary motor (209) is fixed to the rotating end of the rotating shaft (210) via a coupling. A fixed plate (211) is fixed on the top of the rotating shaft (210). A fixed frame (214) is fixed at the center of the screen (201). The fixed frame (214) is connected to the drain plate (216). The fixed disk (211) is slidably connected, and a compression spring is connected between the fixed disk (211) and the fixed frame (214). The screen (201) is slidably connected to the inner wall of the water passage cavity (207). The screen (201) is a cone with the small end facing upward. Multiple slag discharge channels (219) are opened on the side wall of the screening cylinder (100) near the screen (201). A vibration structure for driving the screen (201) to float up and down is provided between the screen (201) and the water passage cavity (207).

3. A paper stock screening apparatus according to claim 2, wherein: The vibration structure includes multiple upper protrusions (206) arranged around the bottom edge of the screen (201). A connecting ring (204) is fixedly installed on the inner wall of the water passage cavity (207) near the bottom of the screen (201). Multiple lower protrusions (205) are fixedly arranged around the upper end of the connecting ring (204). The lower protrusions (205) and the upper protrusions (206) are arc-shaped on the side close to each other and slide together. Multiple keyways (213) are arranged around the inner wall of the fixing frame (214). A spline (212) is slidably installed in the keyway (213). The spline (212) is fixedly connected to the fixing plate (211). A kneading structure is provided above the screen (201) for kneading the residue on the surface of the screen (201).

4. A paper stock screening apparatus according to claim 3, wherein: The kneading structure includes a pressing plate (202) disposed at the top of the sieve cylinder (100). The pressing plate (202) is annular. The bottom end of the pressing plate (202) and the sieve (201) are both inclined on the side close to each other, and there is a V-shaped angle between the two inclined surfaces with the opening facing the inside of the sieve cylinder (100).

5. A paper stock screening apparatus according to claim 4, characterized in that: A plurality of kneading strips (203) are fixed around the bottom end inclined surface of the extruding plate (202).

6. A paper stock screening apparatus according to claim 5, wherein: The kneading strips (203) are made of silica gel.

7. A paper stock screening apparatus according to claim 6, characterized in that: The bottom end of the screening cylinder (100) is made of rubber.

Images