CN115400639B

CN115400639B - Central discharge paddle and washing and filtering equipment

Info

Publication number: CN115400639B
Application number: CN202211067791.0A
Authority: CN
Inventors: 郭彦洪; 冯美林; 杨涛; 于晓燕
Original assignee: Shanghai Senyong Engineering Equipment Co ltd
Current assignee: Shanghai Senyong Engineering Equipment Co ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2024-01-26
Anticipated expiration: 2042-09-01
Also published as: CN115400639A

Abstract

A center discharge paddle and a washing and filtering apparatus are provided. The center discharging paddle comprises a rotating shaft and a paddle group, wherein the paddle group comprises a plurality of cross beams and a plurality of paddles, the rotating shaft is connected to the cross beams, the paddles are respectively connected to the cross beams, the paddles are provided with a liquid facing surface and used for directly pushing materials inwards, at least part of the paddles are different in distance relative to the rotating shaft and respectively pass through different annular paths when rotating, the liquid facing surfaces of the paddles are provided with inclination angles relative to the length direction of the cross beams where the paddles are located or relative to the radial direction passing through the liquid facing surfaces, and the materials in the annular paths can be pushed inwards in the direction facing the rotating shaft when rotating.

Description

Central discharge paddle and washing and filtering equipment

Technical Field

The application relates to the technical field of discharging devices, and in particular relates to a central discharging paddle and washing and filtering equipment.

Background

In industrial production in the fields of pharmacy, chemical industry and the like, the bottom of a required washing and filtering device is often designed to be flat bottom so as to be convenient for installing a filter screen and the like. After the filtration of the device is finished, the residual solid material often contains part of residual liquid, and the material has poor fluidity and needs to be discharged by means of a discharge paddle.

Such devices traditionally use straight paddles as discharge paddles that rotate to push material toward the edges of the container, thus requiring discharge ports in the sides of the container. While the discharge opening provided at the rim of the container is complicated in structure, for example: the need to use hydraulically driven end plugs to effect the seal is susceptible to seal failure due to residual material in such a configuration; meanwhile, the side wall discharge hole is difficult to be lower than the container flat bottom, and more materials are easy to remain. This discharge design also brings higher equipment production costs.

Another existing discharge paddle suitable for flat bottom containers has a discharge opening located in the center of the bottom of the container. It uses helical blades as paddles, the strength of the connection of the blades of such paddles with the rotating shaft being relatively weak. When the spiral blade rotates to discharge, the joint of the blade and the rotating shaft is stressed relatively more, and the stress concentration part is easy to break, so that the structural stability of the spiral blade is poor, and the spiral blade is not suitable for being used in devices with larger inner diameters or higher rotating speeds.

Meanwhile, the washing and filtering device always needs to mix and stir materials in the washing and filtering device in the working process, and the existing blade design often has difficulty in both stirring and mixing the materials and removing the materials, and accordingly the cost and the design difficulty of the washing and filtering device are increased.

Disclosure of Invention

The present application has been made in view of the state of the art described above. The purpose of the application is to provide a central discharging oar that can have stirring and discharging function simultaneously.

The application also provides a washing and filtering device comprising the central discharge paddle.

Embodiments of the present application provide a center discharge paddle that includes a rotating shaft, a paddle set,

the blade group comprises a plurality of cross beams and a plurality of blades,

the rotating shaft is connected to the plurality of cross beams, the plurality of paddles are respectively connected to the plurality of cross beams,

the paddles have a liquid facing surface for pushing material directly inward,

at least part of the plurality of paddles have different distances relative to the rotation axis and respectively pass through different circular paths when rotating,

the liquid facing surfaces of the plurality of paddles have inclination angles relative to the length direction of a cross beam where the liquid facing surfaces are located or relative to the radial direction passing through the liquid facing surfaces, and materials in the circular paths passing through the liquid facing surfaces can be pushed inwards along the direction facing the rotating shaft when the blades rotate.

In at least one possible embodiment, the central discharge paddle is mounted to a flat bottom container,

the flat bottom container comprises a container inner wall, a container bottom surface and a central discharge hole,

the inner wall of the container is cylindrical, the bottom surface of the container is a plane, the central discharge hole is arranged at the center of the bottom surface of the container,

the center discharge paddle further includes a hub to which the rotating shaft and the plurality of cross beams are connected, respectively.

In at least one possible embodiment, the blade set further comprises a central scraper connected to and rotating with a blade of the plurality of blades radially closest to the rotation axis,

the central blade has a curvature which,

the central scraper can clean the materials enriched in the central area of the bottom surface of the container into the central discharge port.

In at least one possible embodiment, the number of said plurality of beams of said blade set is between 2 and 8,

the number of the plurality of paddles connected with each cross beam is 1-15.

In at least one possible embodiment, the number of the plurality of cross beams is an even number, which is arranged in a central symmetrical distribution centering on the rotation axis,

the number of the plurality of paddles connected by each cross beam is equal.

In at least one possible embodiment, the circular paths of each pair of blades, which are radially distant from the rotation axis, partially overlap, ranging from 10% to 40%.

In at least one possible embodiment, the plurality of paddles are sheet-like, having a triangular or rectangular cross-sectional shape,

the liquid facing surfaces of the plurality of paddles are planes or concave surfaces with a certain radian,

the included angle between the liquid facing surface and the axes of the cross beams is 10-80 degrees.

In at least one possible embodiment, the distance from the outer ends of the plurality of cross beams to the inner wall of the container, the distance from the bottoms of the plurality of paddles to the bottom surface of the container, and the distance from the side edge of the radially outermost paddle of the plurality of paddles to the inner wall of the container are each 0-15mm.

In at least one possible embodiment, the plurality of paddles in the same order on the plurality of beams symmetrically arranged are close in radial distance from the rotation axis.

Embodiments of the present application also provide a wash filter device comprising the center drain paddle described above.

The center discharge paddle can fully stir materials during washing and filtering operation, so that the washing and filtering of the materials are more efficient and sufficient. During discharging operation, materials are gradually enriched towards the center of the bottom of the container, and finally discharged through a discharging port arranged at the center of the bottom.

Drawings

Fig. 1 is a schematic structural view of a discharge paddle according to an embodiment of the present application.

Fig. 2 is a side view of a discharge paddle according to an embodiment of the present application.

Fig. 3 is a top view of a discharge paddle according to an embodiment of the present application.

Fig. 4 is a schematic bottom structural view of a discharge paddle according to an embodiment of the present application.

Description of the reference numerals

100. Discharge oar

110. Rotary shaft

120. Hub

130. Paddle group

131. Beams 132, 133, 134

1311. 1312, 1321, 1322, 1331, 1332, 1341, 1342 blade

1343. Center scraper

200. Flat bottom container

210. Inner wall of container

220. Container bottom

230. Center discharge opening

Detailed Description

Exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are merely illustrative of how one skilled in the art may practice the present application and are not intended to be exhaustive of all of the possible ways of practicing the present application nor to limit the scope of the present application.

In this application, unless explicitly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Embodiments of the present application provide a center discharge paddle (hereinafter, sometimes simply referred to as a "discharge paddle").

As shown in fig. 1, the discharge paddle 100 may include a rotating shaft 110, a hub 120, and a blade set 130. The blade set 130 may include a plurality of beams (illustratively, 4 beams 131, 132, 133, 134 in the drawing) each of which may be coupled to a plurality of blades (illustratively, 2 blades 1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342, respectively, each of the beams in the drawing).

As shown in fig. 2, the discharge paddle 100 may be disposed in a flat bottom container 200, and in a typical application scenario, the flat bottom container 200 may be a washing filter device or a part of a washing filter device used in fields such as chemical pharmacy. Flat bottom container 200 may include a container inner wall 210, a container bottom surface 220, and a central drain 230. The inner container wall 210 may be cylindrical and the bottom container surface 220 may be planar (not excluding smaller, e.g., less than 5 degrees of inclination or taper), and the central discharge port 230 may be disposed at a planar center of the bottom container surface 220.

Preferably, the number of beams of the blade set 130 may be 2-8, in particular 4-6, and the number of blades attached to each beam may be 1-15, in particular 2-8. Preferably, the plurality of paddles are independent of each other, separated at least at the lower side.

Preferably, the number of the cross beams of the blade group 130 may be even, the cross beams may be arranged in a central symmetrical manner about the rotation axis, and the number of the blades on each cross beam may be equal. The arrangement mode can enhance the structural strength of the blade group 130, so that the stress of the blade group 130 is uniform, and the stability of the blade group 130 during working is improved.

Preferably, as shown in FIG. 2, the distance from the outer end of the beam to the inner wall 210 of the container, the distance from the bottom of the blade to the bottom surface 220 of the container, and the distance from the side of the outermost blade (blade 1311 in FIG. 1) to the inner wall 210 of the container may be 0-15mm.

Preferably, the blade height may be 5-1500mm.

Preferably, the material of the cross beam can be metal, for example, round steel is selected, and the bottom of the round steel can be turned and milled into a plane. The round steel may be formed into a generally D-shaped cross section by stamping or the like. The round steel here may, but need not be solid. Of course, the material of the cross member is not limited thereto. The cross beam may be welded to the side of hub 120. The material of the blade may be metal.

It will be appreciated that in this embodiment, the cross beam may be a straight beam or a curved beam.

Preferably, the blade may be sheet-like, and its cross-section may be triangular or rectangular in shape. As shown in fig. 3, the cross-section is triangular, in particular, obtuse triangular. The liquid facing surface of the paddle (i.e. the surface of the paddle which directly pushes the material when the paddle rotates to work) can form the longest side of the triangle. The liquid surface of each blade may be, but is not limited to being, planar, for example, the liquid surface may also be concave with a curvature.

Preferably, as shown in fig. 3, the angle between the liquid surface of the blade (the line or plane connecting the radially inner and outer edges of the concave surface when the liquid surface is concave) and the axis of the cross beam may be between 10 and 80 degrees, in particular between 30 and 60 degrees. The liquid-facing inclination angles of all the blades are inward in the clockwise direction or the anticlockwise direction. The specific angle can be calculated and determined according to parameters such as particle size, viscosity and the like of the materials. Illustratively, the angle of attack of the blade in the figures is 45 degrees from the axis of the beam.

The blade 1311 is described herein as the direction of the liquid surface of the blade. The radially outer end of the liquid surface is located further downstream in the rotation direction of the blade than the radially inner end. The liquid surface of the blade 1311 is inclined radially inward (inward) with respect to the radial direction of the flat bottom container 200 in which the cross member 131 is located (or the axial direction, the extending direction, and the longitudinal direction of the cross member 131). The angle between the liquid surface of the blade 1311 and the radial direction may be 10 to 80 degrees, particularly 30 to 60 degrees.

For example, the liquid surface of the blade 1311 may also be a concave surface, such as an arc surface, that protrudes toward the upstream side in the rotation direction of the blade. In this case, the angle between the line (or plane) connecting the radially inner edge and the radially outer edge of the circular arc surface and the radial direction may be 10 to 80 degrees, particularly 30 to 60 degrees.

It is understood that the specific number and arrangement of the cross beams and the paddles can be designed or calculated according to parameters such as the inner diameter of the corresponding flat bottom container, the width of the paddles, the angle of the liquid surface of the paddles relative to the cross beams, and the like. Hub 120 may be shaped according to the number of beams. Each blade may have the same or similar shape, configuration, orientation. Of course, the present application is not limited thereto.

Further, the rotating shaft 110 may be connected to an output shaft of a speed reducer, which is in turn connected to a motor for powering the rotation of the discharge paddles. Alternatively, the speed reducer may be integrally assembled with the motor as a speed reducing motor.

As shown in fig. 1 and 3, the rotary shaft 110 is connected to the hub 120. Preferably, the circumferential surface of the rotation shaft 110 may be formed with a key groove, the hub 120 may be formed with a through hole or a blind hole with an opening facing upward in a vertical direction, and the inner surface thereof may be formed with a key groove. The rotating shaft 110 and the hub 120 may be coupled using a key such that the inner surfaces of the rotating shaft 110 and the hub 120 are fixed in the circumferential direction to transmit movement and torque. Thereby causing the rotating shaft 110 to rotate the entire discharge paddle 100.

Of course, the connection manner of the rotation shaft 110 and the hub 120 is not limited thereto. For example, the two may also be form-fitted, for example by square or hexagonal shaft ends and holes. For example, the rotation shaft 110 and the hub 120 may be fixed or additionally fixed by bolts, welding, or the like. It will be appreciated that one or more connectors may be used to connect the plurality of beams, for example, by one or more annular members to connect and strengthen the beams.

It will be appreciated that the present embodiment may also be implemented without the hub 120, but rather directly connect the cross beam to the rotating shaft. For example, the cross beam and the rotation shaft are fixedly connected by bolts, welding or the like. For example, the lower end portion of the rotation shaft may be formed in a polygonal prism shape so as to connect a plurality of cross members.

As shown in fig. 2 and 3, the rotation direction of the discharge paddle 100 may be clockwise or counterclockwise, and the rotation direction should be consistent with the inclination angle of the liquid surface of the paddle (illustratively, clockwise in the drawing).

In particular, in this embodiment, the paddles are not symmetrically and uniformly distributed, and the positions of the paddles on each beam may be different. The position of the various paddles may be progressively advanced from a position at the end of the beam adjacent to or against the inner wall 210 of the container in a direction approaching the center of the bottom of the container. Illustratively, as shown in fig. 3, the outer blade 1311 of the beam 131 is the outermost blade in the blade set. The paddles 1311, 1321, 1331, 1341, 1312, 1322, 1332, 1342 are in turn relatively close to the central discharge port 230. Blade 1342 is the blade closest to central discharge port 230. It is understood that embodiments of the present application do not exclude portions of the paddles being equally radially spaced from the axis of rotation.

The sweep path of each blade during rotational operation may be in the form of a non-uniform ring, and the ring path of all blades during rotational operation may cover (or substantially cover) the entire container bottom surface 220.

Illustratively, as shown in FIG. 3, the sweep path of blade 1311 is an annular ring closest to the bottom edge of the container. The cleaning paths of the blades 1311, 1321, 1331, 1341, 1312, 1322, 1332, 1342 are circular rings with the same ring width, the inner circle and the outer circle of which have continuously reduced diameters. The adjacent circular paths are partially overlapped.

Preferably, the coverage of the circular paths of the paddles that are close to the axis of rotation 110 (or close to the radial distance or length of the central discharge opening 230) may overlap, and the overlapping range may be 10% -40%.

Preferably, the coverage of the circular paths of the paddles in the same order on symmetrically arranged beams (i.e., the order of paddles on each beam from outside to inside or from inside to outside along the beam) may be adjacent (or partially overlapping). I.e. the same sequence of paddles on symmetrically arranged beams are closely spaced relative to the axis of rotation 110. The blade arrangement mode can enable the mass distribution of the discharge blade to be balanced, and the stress condition of each cross beam and the blades connected with the cross beams is uniform. Thereby reinforcing the intensity of row's oar, the structural stability of its when operation that promotes. Illustratively, as shown in fig. 3, the cross beam 131 and the cross beam 132 are arranged symmetrically in the center, the blade 1311 is similar to and partially overlaps with the circular path of the blade 1321, and the blade 1312 is similar to and partially overlaps with the circular path of the blade 1322; similarly, the cross beam 133 and the cross beam 134 are arranged symmetrically about the center, and the blade 1331 is similar to and partially overlaps the circular path of the blade 1341, and the blade 1332 is similar to and partially overlaps the circular path of the blade 1342.

Since the liquid surface of the blade has an inward inclination (i.e., the radially outer end of the liquid surface is closer to the downstream side in the rotational direction of the blade than the radially inner end), the blade gradually pushes the material on the circular path through which it passes radially inward of the circular path during the rotational movement. The material then enters the circular path of another paddle adjacent (or overlapping) to the inner circle of the circular path, and is further pushed by the paddle toward the central discharge port 230 as the paddle rotates. Eventually, the material will be pushed to a position adjacent to the central discharge opening 230.

As shown in fig. 1 and 4, a center scraper may be further provided on the blade closest to the center discharge opening 230. Illustratively, a center scraper 1343 is provided below the paddles 1342 on the cross beam 134 in the figure. The center scraper 1343 may have a curvature and the radially inner end of the center scraper may be adjacent to (or abut) the edge of the center discharge opening 230. The center scraper 1343 rotates with the blade 1342 to which it is connected, and its sweeping path may be circular. The center scraper 1343 is capable of sweeping material brought by the paddles progressively toward the center discharge port 230 into the center discharge port 230.

It will be appreciated that a center scraper 1343 is not required. In particular, but not by way of limitation, the function of the center scraper 1343 may be replaced by a paddle. In other words, the liquid surface of the innermost one of the paddles may be adjacent (or abutting) the edge of the central discharge opening 230 or slightly overlap the central discharge opening 230.

The different positions in the height direction of each blade need not have the same shape (cross-sectional shape), and preferably, at least the lower end portion of each blade satisfies the above-described structure, orientation, and the like.

Embodiments of the present application also provide a washing filtration apparatus comprising the above-described center drain paddle 100 and flat bottom container 200.

The washing filtration device of the present application has a function of sufficiently stirring the material when performing washing filtration operation, for example: the solid-liquid materials are fully mixed or the impurities are fully dissolved in the washing liquid. When the washing and filtering operation is completed, the apparatus discharges the liquid or washing liquid. At this time, the material can be in a powder state or the residual liquid is in a solid-liquid mixed state, the fluidity is poor, and the material is difficult to be discharged from a discharge hole independently. The discharge paddle 100 can gradually enrich the materials towards the center of the bottom of the container during the discharge operation, and finally smoothly discharge the materials through a discharge hole arranged at the center of the bottom.

The discharge paddles 100 of the present application are particularly useful for discharging materials in a state or nature such as powders, small particles, gels, viscous solid-liquid mixtures, and the like. However, it is to be understood that the use of the discharge paddles 100 of the present application is not limited thereto, and in particular is not limited to the discharge of material from a washing filter device.

It will be appreciated that some aspects or features of the above embodiments may be combined as appropriate.

Some of the advantageous effects of the above-described embodiments of the present application are briefly described below.

(i) The center discharge oar of this application when being applicable to equipment such as washing filtration, can possess the intensive mixing material simultaneously and promote the function of arranging the material, can save equipment space, reduction equipment manufacturing cost.

(ii) The center discharging paddle is suitable for equipment with a plane or an approximate plane at the bottom, and a center discharging port is formed in a center discharging mode. Compared with the traditional side wall discharge hole, the center discharge hole has lower manufacturing and production cost and stable and reliable performance.

(iii) The center row of this application expects the oar, compares in current screw blade, has increased the crossbeam and is used for connecting the paddle, and the area of the face of each paddle also reduces in screw blade. The center discharging paddle has higher structural strength and stability, and can be suitable for production equipment with larger inner diameter.

It is to be understood that in the present application, when the number of parts or members is not particularly limited, the number may be one or more, and the number herein refers to two or more. For the case where the number of parts or members is shown in the drawings and/or described in the specification as a specific number such as two, three, four, etc., the specific number is generally illustrative and not restrictive, it may be understood that a plurality, i.e., two or more, but this does not mean that the present application excludes one.

It should be understood that the above embodiments are merely exemplary and are not intended to limit the present application. Those skilled in the art can make various modifications and changes to the above-described embodiments without departing from the scope of the present application.

Claims

1. A center discharge paddle (100) is characterized by comprising a rotating shaft (110) and a paddle group (130),

the blade set (130) comprises a plurality of beams (131, 132, 133, 134), a plurality of blades (1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342) and a center scraper (1343),

the rotation shaft (110) is connected to the plurality of cross beams (131, 132, 133, 134), the plurality of paddles (1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342) are connected to the plurality of cross beams (131, 132, 133, 134), respectively,

the plurality of paddles (1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342) having a liquid facing surface for pushing material directly inwardly,

at least part of the plurality of paddles (1311, 1312, 1322, 1331, 1332, 1341, 1342) are different in distance relative to the rotational axis (110) and each pass through a different circular path when rotated, the circular paths of each pair of paddles (1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342) having similar radial distances from the rotational axis (110) partially overlap,

the liquid surfaces of the plurality of paddles (1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342) have an inclination with respect to the length direction of a cross beam in which they are located or with respect to a radial direction through the liquid surfaces, capable of pushing material in the respective circular paths when rotated inwards in a direction towards the rotation axis (110),

the center scraper (1343) is connected to and rotates with a blade of the plurality of blades (1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342) that is radially closest to the rotational axis (110).

2. The center row of paddles (100) according to claim 1, characterized in that,

the center discharge paddle (100) further includes a hub (120), and the rotating shaft (110) and the plurality of cross beams (131, 132, 133, 134) are respectively connected to the hub (120).

3. The center discharge paddle (100) of claim 1, wherein the center scraper (1343) has a curvature.

4. The center row of paddles (100) according to claim 1, characterized in that,

the number of the plurality of cross beams (131, 132, 133, 134) of the blade group (130) is 2-8,

the number of the plurality of paddles (1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342) to which each of the cross beams (131, 132, 133, 134) is connected is 1-15.

5. The center row (100) according to claim 1, wherein the number of the plurality of cross beams (131, 132, 133, 134) is an even number, which are arranged in a center symmetrical distribution centering on the rotation axis (110),

the number of the plurality of paddles (1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342) to which each of the cross beams (131, 132, 133, 134) is connected is equal.

6. The center row paddle (100) of claim 1, wherein the overlapping range of the circular paths of each pair of paddles (1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342) that are radially proximate to the rotational axis (110) is 10% -40%.

7. The center discharge paddle (100) of claim 1, wherein the plurality of paddles (1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342) are sheet-like in cross-section having a triangular or rectangular shape,

the liquid surface of the plurality of blades (1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342) is a plane or a concave surface with a certain radian,

the angle between the liquid surface and the axes of the cross beams (131, 132, 133, 134) is 10-80 degrees.

8. The center row paddle (100) of claim 5, wherein the annular path portions of the plurality of paddles (1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342) in the same order on the plurality of beams (131, 132, 133, 134) that are symmetrically arranged overlap.

9. A washing filtration apparatus, comprising:

a flat bottom container; and

the center discharge paddle (100) of any one of claims 1 to 8,

the flat bottom container (200) comprises a container inner wall (210), a container bottom surface (220) and a central discharge opening (230),

the inner wall (210) of the container is cylindrical, the bottom surface (220) of the container is a plane, and the center discharge hole (230) is arranged at the center of the bottom surface (220) of the container.

10. The washing and filtering device according to claim 9, characterized in that the central scraper (1343) is capable of sweeping the material enriched in the central area of the bottom surface (220) of the container into the central discharge opening (230).

11. The washing and filtering apparatus according to claim 9, wherein,

the distance from the outer end of the plurality of cross beams (131, 132, 133, 134) to the inner wall (210) of the container, the distance from the bottom of the plurality of blades (1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342) to the bottom surface (220) of the container, and the distance from the side of the blade closest to the radial outside among the plurality of blades (1311, 1312, 1321, 1322, 1331, 1332, 1341, 1342) to the inner wall (210) of the container are each 0 to 15mm.