Vortex centrifugal fine screening device suitable for high-concentration paper pulp

Abstract

The invention provides a vortex centrifugal fine screening device suitable for high-concentration paper pulp, and relates to the technical field of paper pulp processing, the vortex centrifugal fine screening device comprises a screening tank main body, and a first servo motor is arranged above the screening tank main body; the screening tank main body is of a cylindrical cavity structure, and a fixed ring frame is fixedly mounted in the screening tank main body; a floating assembly is arranged in the screening tank main body, and is adjusted through periodic up-down movement of a floating plate, that is, strong shearing and disturbance in the vertical direction are introduced into high-concentration slurry, and the disturbance can effectively scatter fiber flocculation clusters, so that wrapped impurities are fully exposed in a centrifugal force field; therefore, the impurity removal rate is greatly improved, and the problems that in high-concentration paper pulp, fibers are extremely prone to being wound mutually to form three-dimensional fiber flocculation groups, in a pure centrifugal force field, the flocculation groups possibly move as a whole, impurities wrapped in the flocculation groups are also protected, the impurities are difficult to separate, and the separation efficiency of the flocculation groups is reduced are solved. And the impurity removal efficiency is influenced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of paper pulp processing, and particularly relates to a vortex centrifugal screening device suitable for high-concentration paper pulp. BACKGROUND

[0002] The vortex centrifugal screening of high-concentration paper pulp is a high-efficiency paper pulp purification and screening technology. It is mainly used to remove heavy impurities (such as sand, metal scraps, glue, etc.) and light impurities (such as plastic sheets, foam, ink particles, etc.) in paper pulp at a relatively high concentration (usually 2%-5%). High-concentration paper pulp means that the paper pulp entering the device has less water content, thereby greatly reducing the load of subsequent dewatering treatment and the consumption of process water. Moreover, the device utilizes the principle of fluid mechanics to generate a strong rotational vortex, and the impurities are separated by means of the difference in centrifugal force.

[0003] For example, the paper pulp filtering and screening device disclosed in application No. CN202222960386.3 comprises a filtering box, a hopper-shaped groove is arranged at the bottom of the filtering box, a filtering barrel is arranged at the upper end of the hopper-shaped groove, a pulp outlet is arranged at the lower end of the hopper-shaped groove and penetrates through the bottom of the filtering box, a moving device is arranged at the top of the filtering box; the moving device comprises a mounting seat, a guide plate is arranged horizontally in the mounting seat, an upper guide wheel is arranged on the upper side of the guide plate, a lower guide wheel is arranged on the lower side of the guide plate, the upper guide wheel and the lower guide wheel are both mounted on the two side walls of the mounting seat, an annular tooth groove is arranged between the guide plate and the mounting seat, the annular tooth groove is mounted at the bottom end of the guide plate, a motor is arranged at the lower end of the mounting seat, a gear wheel is arranged at the output end of the motor and penetrates through the mounting seat, a moving rod is arranged at the lower end of the mounting seat, and a brush head is arranged on the side of the moving rod close to the filtering barrel. After being filtered, the impurities are filtered outside the filtering barrel, part of the impurities can directly fall under the action of gravity, and the impurities attached to the surface of the filtering barrel also fall and are removed after being cleaned by the brush head.

[0004] The existing vortex centrifugal screening device for high-concentration paper pulp has the following problems in use. In the high-concentration paper pulp, the fibers are prone to entangle with each other to form three-dimensional fiber flocculation groups. In a pure centrifugal field, these flocculation groups may move as a whole, protecting the impurities wrapped inside and making it difficult to be separated, thereby affecting the impurity removal efficiency. Moreover, the fibers and impurities in the paper pulp are prone to adhere to the surface of the screen, especially in the areas where the screen is stationary or the flow is relatively stable, and gradually form filter cake to block the screen holes, thereby reducing the passing capacity and the screening efficiency. In addition, in the traditional fixed screen device, the impurities continuously accumulate on the surface of the screen, and regular shutdown is required for reverse flushing or disassembly and cleaning, thereby causing production interruption and affecting the impurity discharge efficiency. SUMMARY

[0005] The application relates to a vortex centrifugal fine screening device suitable for high-concentration paper pulp, wherein a floating assembly is arranged in the inside of a screening tank body, the floating assembly is in sliding fit with a first sliding sleeve and a mounting sleeve, and the floating assembly is driven to intermittently float up and down by a convex shaft and a reciprocating screw rod, so that the floating assembly is adjusted by periodic up-and-down movement, strong vertical shearing and disturbance are introduced into high-concentration pulp, the fiber flocculation is effectively broken, and impurities wrapped by the fiber flocculation are fully exposed to a centrifugal force field, thereby greatly improving the removal rate of the impurities.

[0006] The application provides a vortex centrifugal fine screening device suitable for high-concentration paper pulp, and specifically comprises a screening tank body, a first servo motor arranged above the screening tank body, a cylindrical cavity structure of the screening tank body, a fixed ring frame fixedly arranged in the inside of the screening tank body, a floating assembly arranged in the inside of the screening tank body and located below the fixed ring frame, mounting seats fixedly arranged at both sides of the periphery of the screening tank body and symmetrically distributed, a primary screen arranged in the fixed ring frame, a conical screen arranged in the inside of the screening tank body and located above the floating assembly, and a top cover arranged at the top of the screening tank body.

[0007] Further, the first servo motor is fixedly arranged at the middle position of the top of the top cover, an inlet is arranged on the top cover, a blowdown pipe is arranged at the middle position of the bottom of the screening tank body, a discharge pipe is arranged at the bottom of the screening tank body and located at one side of the blowdown pipe, four fixed bases are arranged at the bottom of the screening tank body and symmetrically distributed in a rectangular array.

[0008] Further, a rotating main shaft is arranged at the bottom of the first servo motor and rotationally connected with the top cover through a bearing, a vortex impeller is arranged at the bottom end of the rotating main shaft and located above the conical screen, a reciprocating screw rod is arranged at the lower half of the rotating main shaft and corresponds to the position of the floating assembly.

[0009] Further, two mounting vertical frames are arranged at the bottom of the fixed ring frame and symmetrically distributed, a connecting support is arranged between the two mounting vertical frames, an installation sleeve is arranged at the middle position of the connecting support, and the rotating main shaft is rotationally connected with the installation sleeve through a bearing.

[0010] Further, two limiting sliding grooves are arranged on the inner circumferential surface of the fixed ring frame and symmetrically distributed, and support plates are arranged at the bottom ends of the two mounting vertical frames.

[0011] Further, the floating assembly comprises support frames, floating plates, a first sliding sleeve, a second sliding sleeve and convex shafts, the support frames are arranged in a ring array, floating plates are arranged between two support frames, the floating plates are in a fan shape, two floating plates are symmetrically arranged, a first sliding sleeve is arranged between the top ends of the four support frames, the first sliding sleeve is sleeved on the mounting sleeve, a second sliding sleeve is arranged between the bottom ends of the four support frames, two convex shafts are arranged on the inner circumferential surface of the second sliding sleeve, the two convex shafts are symmetrically arranged, the second sliding sleeve is sleeved on the reciprocating screw rod of the rotating main shaft, and the convex shafts are in meshing connection with the reciprocating screw rod.

[0012] Further, a second servo motor is fixedly installed on one side of the mounting seat, two guide sleeves are arranged on the other side of the mounting seat, the guide sleeves are located in the screening tank body, and the two guide sleeves are symmetrically arranged in an up-down manner, a rotating shaft is arranged on the second servo motor, the rotating shaft is in rotating connection with the mounting seat through a bearing, and a cam is arranged at the end of the rotating shaft.

[0013] Further, an adjusting sleeve frame is arranged between the two guide sleeves, the adjusting sleeve frame is in an annular structure, the cam is located in the adjusting sleeve frame, and the cam is in transmission connection with the adjusting sleeve frame, connecting frames are arranged on the upper and lower sides of the adjusting sleeve frame, and the two connecting frames are respectively slid through the upper and lower guide sleeves.

[0014] Further, a fixed support is fixedly installed in the primary screen in a embedded manner, an installation sleeve is arranged at the middle position of the fixed support, and a rotating main shaft is slid through the installation sleeve, the outer circumferential surface of the primary screen is connected with the upper connecting frame through a pin shaft, and the primary screen is slid connected with the limiting sliding groove of the fixed ring frame through the connecting frame.

[0015] Further, the conical screen is provided with a connecting pipe, a sealing ring is arranged at the bottom end of the connecting pipe, the connecting pipe is slid into the blowdown pipe, the conical screen is provided with two fixed plates, the two fixed plates are symmetrically arranged, the top of the fixed plate is provided with two limiting sliding rods, the two limiting sliding rods are vertically and horizontally arranged, the limiting sliding rods are slid through the support plate, and the top of the conical screen is provided with two fixed sleeves, the fixed sleeves are connected with the lower connecting frame through pin shafts.

[0016] The application provides a vortex centrifugal fine screening device suitable for high-concentration paper pulp, and has the following beneficial effects: The first servo motor is used for providing power, the main shaft is rotated to drive the vortex impeller to rotate, the pulp can be immediately started to rotate at high speed, and a strong vortex field is formed, the floating assembly is arranged in the screening tank body, the first sliding sleeve and the mounting sleeve are in sliding fit, the convex shaft and the reciprocating screw rod are in meshing transmission, the support frame drives the two floating plates to intermittently float up and down, the periodic up-down movement of the floating plate is adjusted, the strong vertical shear and disturbance are introduced into the high-concentration pulp, the fiber flocculation group is effectively dispersed, the impurities are fully exposed in the centrifugal field, and the removal rate of the impurities is greatly improved.

[0017] In addition, the second servo motor is used for providing power, the rotating shaft drives the cam to rotate, the cam and the adjusting sleeve frame are in transmission fit, the adjusting sleeve frame and the upper connecting frame drive the primary screen mesh to intermittently adjust up and down along the limiting sliding groove, during the rapid up-down adjustment of the primary screen mesh, the primary screen mesh and the surrounding pulp fluid produce violent relative motion, local reverse flow and shear force are formed, the pulp can continuously impact the primary screen mesh at a new angle and path, the pulp fibers and impurities are prevented from adhering to the screen holes, the surface of the primary screen mesh is smooth, and good pulp liquid is smoothly passed.

[0018] In addition, during the rotation of the rotating shaft, the cam and the adjusting sleeve frame are in transmission fit, the connecting pipe and the blowdown pipe are in cooperation with the limiting sliding rod and the supporting plate, the adjusting sleeve frame and the lower connecting frame drive the conical screen mesh to intermittently adjust up and down, during the up-down adjustment of the conical screen mesh, the filtered impurities are separated from the surface of the conical screen mesh and are collected downwards along the inclined surface under the action of gravity, and then the impurities are rapidly discharged through the connecting pipe and the blowdown pipe, the up-down adjustment function of the conical screen mesh enables the conical screen mesh to have the on-line, automatic and continuous self-cleaning capacity, the impurities are shaken off and discharged before the impurities are accumulated to a certain degree, the whole cleaning process is synchronous with the main production process, and it is not necessary to stop and maintain cleaning, so that the time utilization rate and the continuous operation capacity of the equipment are greatly improved.

[0019] In addition, the first servo motor can simultaneously rotate and drive the vortex impeller and the reciprocating screw rod, the reciprocating screw rod and the convex shaft are in meshing transmission, the up-down adjustment action of the two floating plates and the rotation action of the vortex impeller can share one motor, the driving motor additionally arranged for the floating plate is omitted, the weight of the equipment is reduced, and the cost is reduced.

[0020] In addition, the adjusting sleeve frame is limited by the guide sleeves of the upper and lower connecting frames, the primary screen mesh and the conical screen mesh are simultaneously driven to be linked, and the up-down adjustment actions of the primary screen mesh and the conical screen mesh are combined together and performed at one time through mechanical transmission, the trouble of step-by-step operation is omitted, and the production efficiency of the equipment is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.

[0022] The drawings in the following description are merely related to some embodiments of the present application, but not limit the present application.

[0023] In the drawings: Figure 1 The structural schematic diagram of the overall axial perspective view of the present application is shown; Figure 2 The structural schematic diagram of the screen tank main body section view perspective of the present application is shown; Figure 3 The structural schematic diagram of the first servo motor, fixed ring frame and floating assembly of the present application is shown; Figure 4 The structural schematic diagram of the first servo motor of the present application is shown; Figure 5 The structural schematic diagram of the fixed ring frame of the present application is shown; Figure 6 The structural schematic diagram of the floating assembly of the present application is shown; Figure 7 The structural schematic diagram of the fixed ring frame, mounting seat, primary screen mesh and conical screen mesh of the present application is shown; Figure 8 The structural schematic diagram of the mounting seat in split state of the present application is shown; Figure 9 The structural schematic diagram of the connecting frame and primary screen mesh, conical screen mesh in split state of the present application is shown.

[0024] List of reference signs: 1, screen tank main body; 101, top cover; 102, feeding port; 103, blowdown pipe; 104, discharge pipe; 105, fixed base frame; 2, first servo motor; 201, rotating main shaft; 202, vortex impeller; 203, reciprocating screw rod; 3, fixed ring frame; 301, mounting vertical frame; 302, connecting support; 303, mounting sleeve; 304, limiting sliding groove; 305, support plate; 4, floating assembly; 401, support frame; 402, floating plate; 403, first sliding sleeve; 404, second sliding sleeve; 405, protruding shaft; 5, mounting seat; 501, second servo motor; 502, guide sleeve; 503, rotating shaft; 504, cam; 505, adjusting sleeve frame; 506, connecting frame; 6, primary screen mesh; 601, fixed support; 602, mounting sleeve; 7, conical screen mesh; 701, connecting insertion pipe; 702, sealing ring; 703, fixed plate; 704, limiting sliding rod; 705, fixed sleeve. DETAILED DESCRIPTION

[0025] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without any inventive effort belong to the scope of protection of the present application.

[0026] Embodiment one: please refer to Figures 1 to 9 : The present application provides a vortex centrifugal screening device suitable for high-concentration pulp, comprising: a screening tank body 1, a first servo motor 2 is arranged above the screening tank body 1; the screening tank body 1 is a cylindrical cavity structure, and a fixed ring frame 3 is fixedly installed inside the screening tank body 1; a floating assembly 4 is arranged inside the screening tank body 1, and the floating assembly 4 is located below the fixed ring frame 3; mounting seats 5 are fixedly installed on both sides of the outer periphery of the screening tank body 1, and the two mounting seats 5 are distributed in a symmetrical manner; a primary screen 6 is arranged in the fixed ring frame 3; a conical screen 7 is arranged at a position close to the bottom in the screening tank body 1, and the floating assembly 4 is located above the conical screen 7; A top cover 101 is arranged at the top of the screening tank body 1, and the first servo motor 2 is fixedly installed at the middle position of the top cover 101; an inlet 102 is arranged on the top cover 101; a blowdown pipe 103 is arranged at the middle position of the bottom of the screening tank body 1; a discharge pipe 104 is arranged at the bottom of the screening tank body 1, and the discharge pipe 104 is located on one side of the blowdown pipe 103; four fixed bases 105 are arranged at the bottom of the screening tank body 1, and the four fixed bases 105 are distributed in a rectangular array manner. First, the high-concentration pulp is introduced into the cylindrical cavity inside the screening tank body 1 through the inlet 102 under a certain pressure, and the high-concentration pulp is filtered and screened through the primary screen 6 and the conical screen 7 from top to bottom, so that the solid particle impurities can be separated, and finally the good slurry is discharged from the discharge pipe 104 for the next processing process through collection and storage.

[0027] In this embodiment, as shown in Figures 3 to 6 The bottom of the first servo motor 2 is provided with a rotating main shaft 201, and the rotating main shaft 201 is rotatably connected with the top cover 101 through a bearing; the bottom end of the rotating main shaft 201 is provided with a vortex impeller 202, and the vortex impeller 202 is located above the conical screen 7; the lower half of the rotating main shaft 201 is provided with a reciprocating screw rod 203, and the reciprocating screw rod 203 corresponds to the position of the floating assembly 4; The bottom of the fixed ring frame 3 is provided with two installation vertical frames 301, and the two installation vertical frames 301 are distributed in a symmetrical manner; a connecting bracket 302 is arranged between the two installation vertical frames 301; an installation sleeve 303 is arranged at the middle position of the connecting bracket 302, and the rotating main shaft 201 is rotatably connected with the installation sleeve 303 through a bearing. The inner circumferential surface of the fixed ring frame 3 is provided with two limiting sliding grooves 304, and the two limiting sliding grooves 304 are symmetrically distributed, and the bottom end of the two installed vertical frames 301 is provided with a support plate 305; The floating assembly 4 comprises a support frame 401, a floating plate 402, a first sliding sleeve 403, a second sliding sleeve 404 and a convex shaft 405, the support frame 401 is distributed in a ring array manner, and the floating plate 402 is arranged between the two support frames 401, the floating plate 402 is in a fan-shaped structure, and the two floating plates 402 are symmetrically distributed, the first sliding sleeve 403 is arranged between the top ends of the four support frames 401, and the first sliding sleeve 403 is slidably sleeved on the mounting sleeve 303, the second sliding sleeve 404 is arranged between the bottom ends of the four support frames 401, the inner circumferential surface of the second sliding sleeve 404 is provided with two convex shafts 405, and the two convex shafts 405 are symmetrically distributed, the second sliding sleeve 404 is sleeved on the reciprocating screw rod 203 of the rotating main shaft 201, and the convex shaft 405 is in meshing connection with the reciprocating screw rod 203, and in the present application, the first servo motor 2 provides power, and the rotating main shaft 201 drives the vortex impeller 202 to rotate, so that the slurry can immediately start high-speed rotation to form a strong vortex field, and since the floating assembly 4 is arranged in the screening tank body 1, the first sliding sleeve 403 is in sliding cooperation with the mounting sleeve 303, and the convex shaft 405 and the reciprocating screw rod 203 are in meshing transmission, so that the support frame 401 drives the two floating plates 402 on the sides to intermittently float up and down, and the periodic up-and-down movement of the floating plate 402 is adjusted, which is equivalent to introducing strong and vertical shear and disturbance into the high-concentration slurry. This disturbance can effectively disperse the fiber flocculation.

[0028] In the embodiment, as shown in the figure, Figures 7 to 9 One side of the mounting seat 5 is fixedly provided with a second servo motor 501, the other side of the mounting seat 5 is provided with two guide sleeves 502, the guide sleeves 502 are located in the screening tank body 1, and the two guide sleeves 502 are symmetrically distributed in an up-down manner, the second servo motor 501 is provided with a rotating shaft 503, the rotating shaft 503 is in rotating connection with the mounting seat 5 through a bearing, and the end of the rotating shaft 503 is provided with a cam 504; An adjusting sleeve frame 505 is arranged between the two guide sleeves 502, the adjusting sleeve frame 505 is in a ring structure, the cam 504 is located in the adjusting sleeve frame 505, and the cam 504 is in transmission connection with the adjusting sleeve frame 505, the adjusting sleeve frame 505 is provided with a connecting frame 506 on the upper side and the lower side, and the two connecting frames 506 are respectively slidably penetrated through the upper and lower guide sleeves 502; The primary screen 6 is fixedly installed in an embedded manner, a fixing support 601 is arranged in the middle position of the fixing support 601, a mounting sleeve 602 is arranged in the middle position of the fixing support 601, and the rotating main shaft 201 is slidably penetrated through the mounting sleeve 602, the outer periphery of the primary screen 6 is connected with the upper connecting frame 506 through a pin shaft, and the primary screen 6 is slidably connected with the limiting sliding groove 304 of the fixed ring frame 3 through the connecting frame 506, in the application, the second servo motor 501 provides power, the cam 504 is driven to rotate through the rotating shaft 503, the adjusting sleeve frame 505 is driven to rotate through the transmission cooperation of the cam 504 and the adjusting sleeve frame 505, the adjusting sleeve frame 505 and the upper connecting frame 506 drive the primary screen 6 to be intermittently adjusted up and down along the limiting sliding groove 304, and the primary screen 6 is quickly adjusted up and down, so that the pulp fibers and impurities are prevented from being attached to the screen holes, the surface of the primary screen 6 is ensured to be smooth, and good slurry is promoted to pass through smoothly.

[0029] In the embodiment, as shown in the figure, Figures 7 to 9 The bottom of the conical screen 7 is provided with a connecting pipe 701, the bottom end of the connecting pipe 701 is provided with a sealing ring 702, the connecting pipe 701 is slidably inserted into the blow-off pipe 103, the top of the conical screen 7 is provided with two fixing plates 703, the two fixing plates 703 are symmetrically distributed, the top of the fixing plate 703 is provided with two limiting sliding rods 704, the two limiting sliding rods 704 are vertically and parallelly distributed, the limiting sliding rod 704 is slidably penetrated through the supporting plate 305, the top of the conical screen 7 is provided with two fixing sleeves 705, and the fixing sleeve 705 is connected with the lower connecting frame 506 through a pin shaft, when the rotating shaft 503 drives the cam 504 to rotate, the adjusting sleeve frame 505 is driven to rotate through the transmission cooperation of the cam 504 and the adjusting sleeve frame 505, and the adjusting sleeve frame 505 and the lower connecting frame 506 drive the conical screen 7 to be intermittently adjusted up and down through the cooperation of the connecting pipe 701 and the blow-off pipe 103 with the limiting sliding rod 704 and the supporting plate 305, the impurities filtered in the up-and-down adjustment process of the conical screen 7 are separated from the surface of the conical screen 7 and collected downward along the inclined surface under the action of gravity, and then the impurities are quickly discharged through the connecting pipe 701 and the blow-off pipe 103, and the conical screen 7 has the online, automatic and continuous self-cleaning capacity due to the up-and-down adjustment function, and the impurities are shaken off and discharged before being accumulated to a certain degree.

[0030] In the embodiment, as shown in the figure, Figure 3 The first servo motor 2 is used for simultaneously rotating and driving the vortex impeller 202 and the reciprocating wire rod 203, the reciprocating wire rod 203 and the convex shaft 405 are engaged and driven, the up-and-down adjustment action of the two floating plates 402 and the rotating action of the vortex impeller 202 can be driven by one motor, and the driving motor for the floating plate 402 is omitted. In the embodiment, as shown in the figure, Figure 7As shown, the adjusting sleeve frame 505 of the present application is limited by the upper and lower connecting frames 506 cooperating with the guide sleeve 502, can simultaneously drive the primary screen 6 and the conical screen 7 to link together, and the up and down adjusting actions of the primary screen 6 and the conical screen 7 are combined together by mechanical transmission to be performed at one time, so the trouble of step-by-step operation is saved.

[0031] The working principle of the embodiment is as follows: in use, first, the high-concentration paper pulp is fed into the cylindrical cavity inside the screening tank main body 1 through the feed inlet 102 under a certain pressure; the first servo motor 2 provides power to drive the vortex impeller 202 to rotate through the rotating shaft 201, so that the pulp can immediately start high-speed rotation to form a strong vortex field; the floating assembly 4 is arranged inside the screening tank main body 1, and the first sliding sleeve 403 is in sliding cooperation with the mounting sleeve 303, and the convex shaft 405 and the reciprocating screw rod 203 are engaged and driven, so that the support frame 401 drives the two side floating plates 402 to intermittently float up and down, and the periodic up and down movement of the floating plates 402 is adjusted, which is equivalent to introducing strong and vertical shear and disturbance into the high-concentration pulp, and the disturbance can effectively break up the fiber flocculation; the second servo motor 501 provides power to drive the cam 504 to rotate through the rotating shaft 503, and the cam 504 and the adjusting sleeve frame 505 are driven and cooperated, so that the adjusting sleeve frame 505 and the upper connecting frame 506 drive the primary screen 6 to intermittently adjust up and down along the limiting sliding groove 304; through the rapid up and down adjustment of the primary screen 6, the pulp fibers and impurities are prevented from adhering to the screen holes, the surface of the primary screen 6 is ensured to be smooth, and good pulp liquid is promoted to pass through smoothly; during the rotation of the rotating shaft 503 to drive the cam 504 to rotate, the cam 504 and the adjusting sleeve frame 505 are driven and cooperated, and the connecting insertion pipe 701 and the blowdown pipe 103 are cooperated with the limiting sliding rod 704 and the supporting plate 305, so that the adjusting sleeve frame 505 and the lower connecting frame 506 drive the conical screen 7 to intermittently adjust up and down; through the up and down adjustment of the conical screen 7, the filtered impurities are separated from the surface of the conical screen 7 and collected downward along the inclined surface under the action of gravity, and then the impurities are quickly discharged through the connecting insertion pipe 701 and the blowdown pipe 103; due to the up and down adjustment function of the conical screen 7, the conical screen 7 has the online, automatic and continuous self-cleaning ability, and the impurities are shaken off and discharged before they accumulate to a certain extent; in addition, the high-concentration paper pulp passes through the primary screen 6 and the conical screen 7 from top to bottom for filtration and screening, so that the solid particle impurities are separated, and finally the good pulp liquid is discharged from the discharge pipe 104 for next processing process through collection and storage.

[0032] The embodiments of the present application are presented by way of example and description, and are not intended to be exhaustive or to limit the application to the form disclosed. Many modifications and variations will be apparent to those skilled in the art. Embodiments are chosen and described in order to best explain the principles of the application and its practical application, and to thereby enable others skilled in the art to best utilize the application in various embodiments and with various modifications as are suited to the particular use contemplated.

Claims

1. A vortex centrifugal fine screening device suitable for high-concentration pulp, characterized in that, include: The screening tank body (1) is provided with a first servo motor (2) on top of the screening tank body (1); the screening tank body (1) is a cylindrical cavity structure, and a fixed ring frame (3) is fixedly installed inside the screening tank body (1); a floating component (4) is provided inside the screening tank body (1), and the floating component (4) is located below the fixed ring frame (3); mounting seats (5) are fixedly installed on both sides of the outer periphery of the screening tank body (1), and the two mounting seats (5) are distributed symmetrically; a primary screen (6) is provided inside the fixed ring frame (3); a conical screen (7) is provided at the bottom of the screening tank body (1), and the floating component (4) is located above the conical screen (7).

2. The vortex centrifugal fine screening device suitable for high-concentration pulp according to claim 1, characterized in that, The main body (1) of the screening tank is provided with a top cover (101), and the first servo motor (2) is fixedly installed at the middle position of the top of the top cover (101). The top cover (101) is provided with a feed inlet (102). The bottom of the main body (1) of the screening tank is provided with a drain pipe (103). The bottom of the main body (1) of the screening tank is provided with a discharge pipe (104), and the discharge pipe (104) is located on one side of the drain pipe (103). The bottom of the main body (1) of the screening tank is provided with four fixed base frames (105), and the four fixed base frames (105) are distributed in a rectangular array.

3. The vortex centrifugal fine screening device suitable for high-concentration pulp according to claim 1, characterized in that, The first servo motor (2) has a rotating spindle (201) at the bottom, and the rotating spindle (201) is rotatably connected to the top cover (101) through a bearing. The bottom end of the rotating spindle (201) is provided with a vortex impeller (202), and the vortex impeller (202) is located above the conical screen (7). The lower half of the rotating spindle (201) is provided with a reciprocating screw (203), and the reciprocating screw (203) corresponds to the position of the floating component (4).

4. The vortex centrifugal fine screening device suitable for high-concentration pulp according to claim 1, characterized in that, The fixed ring frame (3) has two mounting brackets (301) at the bottom, and the two mounting brackets (301) are symmetrically distributed. A connecting bracket (302) is provided between the two mounting brackets (301). A mounting sleeve (303) is provided in the middle of the connecting bracket (302), and the rotating main shaft (201) is rotatably connected to the mounting sleeve (303) through a bearing.

5. A vortex centrifugal fine screening device suitable for high-concentration pulp according to claim 4, characterized in that, The inner circumferential surface of the fixed ring frame (3) is provided with two limiting grooves (304), and the two limiting grooves (304) are distributed symmetrically. The bottom ends of the two mounting vertical frames (301) are provided with support plates (305).

6. A vortex centrifugal fine screening device suitable for high-concentration pulp according to claim 1, characterized in that, The floating component (4) includes a support frame (401), a floating plate (402), a first sliding sleeve (403), a second sliding sleeve (404), and a convex shaft (405). The support frame (401) is arranged in a circular array in four places, and a floating plate (402) is provided between two support frames (401). The floating plate (402) has a fan-shaped structure, and the two floating plates (402) are distributed symmetrically. A first sliding sleeve is provided between the tops of the four support frames (401). (403), and the first sliding sleeve (403) is slidably fitted on the mounting sleeve (303). A second sliding sleeve (404) is provided between the bottom ends of the four support brackets (401). The inner circumferential surface of the second sliding sleeve (404) is provided with two protruding shafts (405), and the two protruding shafts (405) are distributed symmetrically. The second sliding sleeve (404) is fitted on the reciprocating screw (203) of the rotating main shaft (201), and the protruding shaft (405) is meshed with the reciprocating screw (203).

7. A vortex centrifugal fine screening device suitable for high-concentration pulp according to claim 1, characterized in that, The mounting base (5) is fixedly mounted on one side with a second servo motor (501) and two guide sleeves (502) on the other side. The guide sleeves (502) are located inside the screening tank body (1) and the two guide sleeves (502) are distributed in a symmetrical manner. The second servo motor (501) is provided with a rotating shaft (503), and the rotating shaft (503) is rotatably connected to the mounting base (5) through a bearing. The end of the rotating shaft (503) is provided with a cam (504).

8. A vortex centrifugal fine screening device suitable for high-concentration pulp according to claim 7, characterized in that, An adjusting sleeve frame (505) is provided between the two guide sleeves (502). The adjusting sleeve frame (505) has an annular structure, and the cam (504) is located inside the adjusting sleeve frame (505). The cam (504) is connected to the adjusting sleeve frame (505) in a transmission manner. Connecting frames (506) are provided on the upper and lower sides of the adjusting sleeve frame (505), and the two connecting frames (506) slide through the upper and lower guide sleeves (502) respectively.

9. A vortex centrifugal fine screening device suitable for high-concentration pulp according to claim 1, characterized in that, The primary screen (6) is fixedly installed with a fixed bracket (601) by embedding. The fixed bracket (601) has an installation sleeve (602) in the middle position, and the rotating main shaft (201) slides through the installation sleeve (602). The outer periphery of the primary screen (6) is connected to the upper connecting frame (506) by a pin, and the primary screen (6) is slidably connected to the limiting groove (304) of the fixed ring frame (3) through the connecting frame (506).

10. A vortex centrifugal fine screening device suitable for high-concentration pulp according to claim 1, characterized in that... The conical screen (7) is provided with a connecting tube (701) at the bottom. A sealing ring (702) is provided at the bottom port of the connecting tube (701). The connecting tube (701) is slidably inserted into the sewage pipe (103). The top of the conical screen (7) is provided with two fixing plates (703). The two fixing plates (703) are symmetrically distributed. The top of the fixing plate (703) is provided with two limiting slide rods (704). The two limiting slide rods (704) are vertically parallel. The limiting slide rods (704) slide through the support plate (305). The top of the conical screen (7) is provided with two fixing sleeves (705). The fixing sleeves (705) are connected to the lower connecting frame (506) through a pin.

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