CN212445691U

CN212445691U - Even extrusion device of mud material

Info

Publication number: CN212445691U
Application number: CN202020934826.6U
Authority: CN
Inventors: 李永蔚; 冯家迪; 钱炳华
Original assignee: JIANGSU PROVINCE YIXING NONMETALLIC CHEMICAL MACHINERY FACTORY CO Ltd
Current assignee: JIANGSU PROVINCE YIXING NONMETALLIC CHEMICAL MACHINERY FACTORY CO Ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-02-02
Anticipated expiration: 2030-05-28

Abstract

The utility model discloses an even extrusion device of mud material, include block and the otter board that sets up in pugging machine or extrusion barrel, block and otter board and extrusion mud section are with the axle center, otter board and block middle part are bellied sphere be provided with the second through-hole for the central axis slope on the sphere of otter board. The utility model discloses a otter board thickness increases, and sets up the through-hole on the otter board and compare in the central axis slope setting of otter board, and the otter board of thickening and the through-hole that the slope set up have prolonged the time that the mud material passes through the otter board, and the through-hole of slope makes the mud material mix more evenly, has further improved the even degree of extruding mud section every point on same cross-section.

Description

Even extrusion device of mud material

Technical Field

The utility model belongs to the technical field of the production of carrier pug, concretely relates to even extrusion device of pug.

Background

The wall thickness of the carrier is developed towards a thin wall, the requirements of the uniformity and the compactness of the pug are further improved, and the inevitable existence of large-particle impurities, large-particle raw materials or stiff blocks and the like in the pug can cause that when the carrier is extruded in a pug mill, the extruded pug segment is uneven, and a subsequent formed product is easy to deform and has more defects. The Chinese patent with application number of 2017107290403 discloses a process for producing and forming carrier pug, which adopts a blocking net and a screen plate which are provided with spherical surfaces, holes are arranged on the blocking net and the screen plate, and a pug section passes through the blocking net and the screen plate to be extruded and formed. The practical operation shows that the uniformity of the extruded mud section can not meet the design requirement, and analysis shows that the mud passes through the screen plate in a short time because the thickness of the screen plate is thinner and the central axes of the holes are parallel to the central axis of the screen plate, the mud is extruded from the horizontal holes, the subsequent mixing of the mud discharged from each hole is not uniform, the balance of the mud discharging speed with the edge and the middle mud discharging speed is ensured, but the uniformity of the mud section can not meet the requirement.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem: the uniformity of the extruded mud segment does not meet the requirements.

The technical scheme is as follows: in order to solve the technical problem, the utility model discloses a technical scheme as follows:

the utility model provides an even extrusion device of mud material, includes block and otter board that sets up in pugging machine or extruder barrel, the block is with the otter board with extrude the mud section with the axle center, otter board and block middle part are bellied sphere be provided with the second through-hole for the central axis slope on the sphere of otter board.

Preferably, the cross sections of the net plate and the blocking net are circular, the center of the spherical surface is located on the central axis of the net plate, and the spherical surface protrudes towards the direction opposite to the mud discharging direction.

Preferably, the edges of the net plate and the barrier net are planes, and the edge planes of the net plate are provided with first through holes

Preferably, a connection point of the central axis of the second through hole and the central axis of the screen plate is A, and the connection point A is located at a position which is 0.5-4 times of the spherical radius away from the spherical center.

Preferably, the connection point A is located at a position which is 0.8-2 times of the spherical radius from the center of the sphere.

Preferably, the thickness of the mesh plate is 20-60 mm.

Preferably, the thickness of the mesh plate is 30-50 mm.

Preferably, the barrier net is positioned at the front end of the net plate, and the barrier net and the net plate have the same shape.

Has the advantages that: compared with the prior art, the utility model has the advantages of it is following:

the utility model discloses an even extrusion device of pug, the utility model discloses a when pug is extruded, at first through the block, the block has the guidance quality to the pug, can get rid of the large granule in the pug simultaneously, the utility model discloses all set to the bellied sphere of mud opposite direction at block and otter board, forward extrusion power when intermediate position pug crosses the block, still receive the outside shearing force of sphere finger, has reduced middle mud speed, has increased edge mud speed, and the stifled hole large granule is difficult for gathering in the middle of the screen cloth, and most granule can remove screen cloth border position under the effect of pug extrusion force, and the screen cloth is difficult for the stifled hole and has prolonged screen cloth life, makes the play mud speed of whole face even.

The utility model discloses a thickness of screen plate increases, and sets up the through-hole on the otter board and compare in the central axis slope setting of otter board, and the otter board of thickening has prolonged the time that the pug passes through the otter board, and the through-hole that the slope set up has increased the extrusion resistance of zhonghuan pug, makes the pug of extruding more even, has further improved the even degree of extruding mud section every point on same cross-section.

Drawings

FIG. 1 is a schematic structural diagram of a pug uniform extrusion device;

FIG. 2 is a radial cross-sectional view of a mesh surface of the pug uniform extrusion device;

FIG. 3 is a schematic view of the angle of the through hole of the device for uniformly extruding pug;

FIG. 4 is a sectional view of a pug section extruded by the pug uniform extruding device.

Detailed Description

The present invention will be further illustrated by the following specific examples, which are carried out on the premise of the technical scheme of the present invention, and it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1-4, the device for uniformly extruding pug comprises a blocking net 1 and a net plate 2 which are arranged in a pug mill or an extruder barrel, wherein the blocking net 1 is positioned at the front end of the net plate 2 (the mud discharging direction is defined as the rear end, and the direction opposite to the mud discharging direction is defined as the front end), the blocking net 1 and the net plate 2 are the same in shape and different in thickness, the cross sections of the net plate 2 and the blocking net 1 are both circular, the blocking net 1 and the net plate 2 are coaxially arranged with a mud extruding section, the middle parts of the net plate 2 and the blocking net 1 are provided with convex spherical surfaces 3, the edges of the net plate 2 and the blocking net 1 are planes, the center of the spherical surfaces 3 is positioned on the central axis of the net plate 2, and the spherical surfaces 3 are convex.

The diameter R of the sphere 3 can be calculated according to an empirical formula:

R＝(1-(Δ3-Δ4)*D/2

in the formula: d is the diameter of the mesh plate 2, R is the diameter of the spherical surface 3, and delta 1, delta 2, delta 3 and delta 4 are percentage deviations of the density values of the pug at 1, 2, 3 and 4 points of the end face of the extruded pug from the total average value. Two points of the continuous maximum differences Δ 1, Δ 2, Δ 3, Δ 4 are selected. For example, if the difference between Δ 2 and Δ 3 is the largest, the distance from the midpoint between 2 and 3 to the center of the mud segment is taken as the radius, and then the radius is multiplied by 2D/B to obtain the diameter L of the spherical intersection line, wherein B is the diameter of the mud segment.

When the mud material is extruded, at first through block 1, block 1 is provided with the mesh, plays the effect of screen cloth, and block 1 has the guidance quality to the mud material, can get rid of the large granule in the mud material simultaneously, the utility model discloses all set to the bellied sphere 3 of mud opposite direction at block 1 and otter board 2, the forward extrusion power when intermediate position mud material crosses block 1 still receives the sphere and indicates outside shearing force, has reduced middle mud speed, has increased edge mud speed, and stifled hole large granule is difficult for gathering in the middle of the screen cloth, and most granule can move screen cloth border position under the mud material extrusion force effect, does not influence extrusion speed basically, makes the mud speed of play of whole face even.

According to the bernoulli equation: p +1/2 ρ v2+ ρ gh ═ constant

In the above formula, P is pressure, ρ is fluid density, v is flow velocity of the fluid, g is gravity acceleration, h is height of the point, pressure at high flow velocity is low, and pressure at low flow velocity is high. The utility model discloses a radian and sphere 3's of otter board 2 and block 1 scope just can adjust "limit" well "and go out the mud speed unanimously, promptly" limit "well" pressure unanimous, just also make the pug homogeneity unanimous.

In order to further improve the homogeneity of extruding the mud section, the utility model discloses evenly set up first through-hole 4 at the planar part of otter board 2, the central axis of first through-hole 4 is parallel with the central axis of otter board 2, evenly sets up second through-hole 5 at the spherical part of otter board 2, and second through-hole 5 sets up for the central axis slope of otter board 2. The angle between the central axis of the second through hole 5 and the central axis of the screen plate 2 is alpha, the angle alpha changes with different values at the position of the screen plate, the central axis of the second through hole 5 is a connection point A with the central axis of the screen plate 2, the connection point A is located at a position which is 0.5-4 times of spherical radius from the spherical center C, and preferably at a position which is 0.8-2 times of spherical radius from the spherical center, so that the size of alpha is determined. The diameter of the second through holes 5 is 5-30 mm, preferably 10-20 mm, and the hole density of the second through holes 5 of the screen plate 2 is such that the area of the second through holes 5 accounts for 20-40% of the area of the spherical surface, preferably 25-30%.

The thickness of current otter board 2 is thinner, and the central axis setting that is the central axis and is on a parallel with otter board 2 of all current through-holes, and when the mud material passed through the through-hole on the otter board 2, the homogeneity was not high enough, did not reach required standard, consequently the utility model discloses an otter board 2 thickens on current basis, and thickness increases to 20-60mm, and the thickness of preferred otter board 2 is 30-50 mm. The time for the pug to pass through each through hole 4 is prolonged, and the uniformity of the extruded pug section is further improved. The thickness of otter board 2 increases, and sets up through-hole 4 on otter board 2 and compare in the central axis slope setting of otter board 4, and the through-hole 4 that the otter board 2 of thickening and slope set up has prolonged the pug and has passed through the time of otter board, and the through-hole of slope makes the pug mix more evenly, and both combine together, have further improved the even degree of extruding mud section every point on same cross-section.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a mud material evenly extrudees device which characterized in that: including block (1) and otter board (2) that set up in pugging machine or extruder barrel, block (1) and otter board (2) and extrude the mud section with the axle center, otter board (2) and block (1) middle part are bellied sphere (3) be provided with second through-hole (5) for the central axis slope on the sphere of otter board (2).

2. The pug uniform extrusion device according to claim 1, characterized in that: the cross sections of the net plate (2) and the blocking net (1) are circular, the center of the spherical surface (3) is located on the central shaft of the net plate (2), and the spherical surface (3) protrudes towards the direction opposite to the mud discharging direction.

3. The pug uniform extrusion device according to claim 1, characterized in that: the edges of the net plate (2) and the barrier net (1) are planes, and the edge plane of the net plate (2) is provided with a first through hole (4).

4. The pug uniform extrusion device according to claim 1, characterized in that: the connection point of the central axis of the second through hole (5) and the central line axis of the screen plate (2) is A, and the connection point A is located at a position which is 0.5-4 times of the spherical radius away from the spherical center.

5. The pug uniform extrusion device according to claim 4, characterized in that: the connecting point A is located at a position which is 0.8-2 times of the spherical radius away from the spherical center.

6. The pug uniform extrusion device according to claim 1, characterized in that: the thickness of the screen plate (2) is 20-60 mm.

7. The pug uniform extrusion device according to claim 6, characterized in that: the thickness of the screen plate (2) is 30-50 mm.

8. The pug uniform extrusion device according to claim 1, characterized in that: the barrier net (1) is positioned at the front end of the net plate (2), and the barrier net (1) and the net plate (2) are the same in shape.