KR102298904B1 - Shaftless screw conveying device - Google Patents

Abstract

The present invention is to provide a shaftless screw transfer device capable of complexly performing a mixing process by stirring during a process of transferring materials of various properties. The shaftless screw transfer device comprises: a casing (100) which has a plurality of inlets (110) formed on one side thereof to allow two or more kinds of materials to be inserted thereinto, and has an outlet (120) formed on the other side of thereof to discharge a mixed material; an outer screw (200) which is installed in the casing (100), is rotated by a driving module (220), is spirally formed, and is provided to transfer the material toward the outlet (120); and an inner screw (300) which is installed in the outer screw (200) and spirally formed in the opposite direction to the outer screw (200) to stir and transfer a part of the material toward the inlet (110). When the shaftless screw transfer device is used, the outer screw and the inner screw are formed in a spiral shape in the opposite direction to each other. Thus, the structure thereof is improve so that mixing is performed forcibly during a material transfer process. Accordingly, a separate mixing process can be omitted.

Description

Shaftless screw conveying device

The present invention relates to a shaftless screw feeder, which, in more detail, relates to a shaftless screw feeder capable of performing agitation during the process of transferring materials having various properties.

Conventionally, a conveyor screw is used for conveying or mixing materials. The conveyor screw is installed in the chamber and a spirally formed spiral plate is installed on the outer periphery of the rotation shaft, and the spiral plate is rotated together with the rotation shaft to transport the material.

The material transported on the conveyor using such a screw is pushed by the spiral plate while being accommodated in the space between the adjacent spiral plates, and is provided to be transported in the chamber, so the stirring action during transport cannot be achieved.

Accordingly, in the registration room No. 20-0448455 disclosed in the prior art, a first screw blade installed on the rotary shaft and stirred to push the feed material to either side when the rotary shaft rotates; a second screw blade installed on the rotating shaft and configured to push and agitate the feed material in a direction opposite to the first screw; The first screw blade and the second screw blade are configured by helically installing a plate-shaped band at a certain distance from the rotation axis, and each screw blade is wound to have a different diameter, and a screw blade having a small diameter has a large diameter. A technology characterized in that the width is formed wider than that of a screw blade having a

In addition, in Patent No. 10-1281382, which is another prior art, a case having both side walls and a U-shaped bottom in cross section between the side walls, a central axis rotatably supported by both side walls of the case, Power generating means installed in a spiral by a plurality of connections on the central axis, and connected to the inner and outer blades of the ribbon type formed inside and outside and the central shaft extending to the outside of the case through power transmission means to generate power It is configured to include, and the spiral direction of the inner and outer blades are made opposite to each other, and the technology made symmetrically from the center of the case has been registered in advance.

However, in the prior art, the material is stirred while moving in opposite directions by two spiral screw blades (blades), but the screw blades (blades) are fixed to the rotation shaft (central shaft) to transmit the rotational force. There was a problem in that the internal space of the case was reduced as much as the volume, thereby reducing the material transport and stirring capacity.

In addition, in order to secure a material stirring passage between the outer circumferential surface of the rotating shaft and the inner circumferential surface of the screw blade (blade), the area of the screw blade (blade) is reduced relatively narrowly. In addition, the disadvantage of not being able to transport various materials on a ship with agitation was followed.

US 20-0448455 Y1 (2010.04.06.) US 10-1281382 B1 (2013.06.26.)

In the present invention, a new technology has been devised to solve the problems of the prior art, and an outer screw and an inner screw are spirally formed in opposite directions to each other so that forced mixing and stirring action can be performed during the material transfer process. To provide is a problem to be solved in the invention.

Another object of the present invention is to provide a shaftless screw feeder with a small amount of screw deflection by further installing a plurality of shaft rods inside the inner screw.

Although not described separately, other objects within the scope that can be inferred in consideration of the specific contents and claims for carrying out the following invention are also included in the overall task of the present invention.

As a specific means for solving the problems of the present invention, the present invention constitutes a shaftless screw feeder, but a plurality of inlets 110 are formed on one side, two or more kinds of materials are input, and an outlet 120 on the other side is The casing 100 is formed and provided to discharge the mixed material; an outer screw 200 installed in the casing 100, rotationally moved by the driving module 220, formed in a spiral, and provided to transport the material toward the outlet 120; and an inner screw 300 installed in the outer screw 200, spirally formed in the opposite direction to the outer screw 200, and provided to stir and transport a portion of the material toward the inlet 110 side.

The driving module 220 includes a driving wheel 222 installed on one side of the casing 100 and rotated by a motor M, and the driving wheel 222 includes an outer screw 200 and an inner screw 300 . It is connected to one or more ends of any one of the ends and is provided to transmit a driving force, a liner member 400 is provided on the inner bottom of the casing 100, and the liner member 400 protrudes higher than the inner bottom of the casing 100, It is characterized in that the outer circumferential surface of the outer screw 200 is provided so as to be supported in a non-contact state on the inner bottom of the casing 100 .

At this time, the liner member 400 is provided such that the upward protrusion length is corrected by the wear correction unit 420 , and the wear correction unit 420 is formed on the inner bottom of the casing 100 so that the liner member 400 is The slot 421 to be inserted, the push plate 423 installed inside the slot 421 and an upward protruding force acts by the elastic body 422, one end is connected to the push plate 423, and the other end is the casing 100 ) exposed to the outside and includes a rod rod 424 having a scale displayed on the outer circumferential surface, wherein the rod rod 424 is moved to the inside of the casing 100 by the amount of wear of the liner member 400, and the liner member ( 400) is characterized in that it is provided to measure the amount of wear. characterized in that

In addition, the driving module 220 is installed on one side of the casing 100 and is installed on the other side of the driving wheel 222 rotated by the motor M, and the casing 100 opposite to the driving wheel 222. The driven wheel 224, both ends connected to the driving wheel 222 and the driven wheel 224, it characterized in that it includes a plurality of first shaft rods 226 for supporting the inner screw 300 from the inside.

In addition, the first shaft rod 226 is inserted into the first guide hole 226a formed in the driving wheel 222 and the driven wheel 224 to be movable in a straight line, and one end is outside the casing 100 . A first cam roller 226b is provided, and a second shaft rod 227 installed in parallel with the first shaft rod 226 to support the outer screw 200 from the inside is provided, and the second shaft rod 227 is installed so that both ends are inserted into the second guide hole 227a formed in the driving wheel 222 and the driven wheel 224 to be movable in a straight line, and one end of which is exposed to the outside of the casing 100 Two cam rollers 227b are provided, and a sinusoidal cam wheel 228 is provided at positions corresponding to the first and second cam rollers 226b and 227b, and first and second cam rollers 226b and 227b. is provided so as to reciprocate linearly in the opposite direction on the sine wave cam wheel 228 while rotating together with the driving wheel 222, and the outer screw 200 by the first and second cam rollers 226b and 227b. It is characterized in that the inner screw 300 is linearly reciprocated in the opposite direction to each other, and the inner circumferential surface of the outer screw 200 and the outer circumferential surface of the inner screw 300 are cross-transferred to pulverize the material by the shearing principle.

According to the specific means for solving the above problems, in the present invention, the structure is improved so that the outer screw and the inner screw are spirally formed in the opposite direction to each other and forcibly mixed during the material transfer process, so that a separate mixing process is omitted, and the outer screw and the inner screw are It has an effect of stably mixing and transporting materials of various properties while being formed in a shaftless structure and flowing flexibly.

In addition, since the inner screw is supported by a plurality of shaft rods formed inside, the wear rate of the liner inside the casing is lowered, and the high-speed rotation of the screw is possible, thereby further increasing the feed rate of the material.

1 is a view showing a preferred embodiment of the shaftless screw feed device provided in the present invention
Figure 2 is a block diagram showing the liner member of the shaftless screw feeder according to an embodiment of the present invention.
Figure 3 is a configuration diagram showing a wear correction unit of the shaftless screw feeder according to an embodiment of the present invention.
4 is a configuration diagram illustrating a state in which the liner member of the shaftless screw transfer device according to an embodiment of the present invention is moved up and down by a driving cylinder.
Figure 5 is a view showing another embodiment of the shaftless screw feed device provided in the present invention
Figure 6 is a configuration diagram showing the arrangement structure of the first shaft of the shaftless screw feed device of Figure 5;
7 is a configuration diagram showing a structure in which the first and second shaft rods of the shaftless screw feeder are linearly reciprocated in opposite directions to each other.

Hereinafter, the present invention will be described in more detail according to specific embodiments of the accompanying drawings. Technical terms used in this specification are terms selected in consideration of functions in embodiments, and the meaning of the terms may vary according to specific embodiments of the present invention. And throughout the specification, when a part is "connected" with another part, this includes not only the case where it is "directly connected" but also the case where it is "indirectly connected" with another member interposed therebetween. do.

1 is a view showing a preferred embodiment of the shaftless screw feed device provided in the present invention.

The present invention is used to mix dry sludge and dewatered sludge in a sewage treatment plant, or to blend feed or chemicals, characterized in that it is not simply blended, but is well mixed while transporting a plurality of materials It relates to a shaftless screw feeder.

This is because the outer screw and the inner screw are spirally formed in the opposite direction to each other and the structure is improved so that they are mixed forcibly during the material transfer process, thereby omitting a separate mixing process. It consists of a main configuration including a casing 100, an outer screw 200, and an inner screw 300 so as to stably mix and transport the materials.

The casing 100 according to the present invention is provided so that a plurality of inlets 110 are formed on one side, two or more kinds of materials are put, and an outlet 120 is formed on the other side to discharge the mixed materials.

The casing 100 is formed as a circular tubular body, an outer screw 200 and an inner screw 300 to be described later are installed therein, and two or more kinds of materials introduced through a plurality of inlets 110 are added to the outer screw 200 . ), while being stirred (mixed) by the inner screw 300, it is discharged through the outlet 120.

The outer screw 200 according to the present invention has one side connected to the driving module 220 to rotate, and is formed in a spiral shape, and is installed adjacent to the inner wall of the casing 100 to transport the material to the outlet 120 side. do.

In addition, an inner screw 300 is installed in the outer screw 200 , and the inner screw 300 is spirally formed in a direction opposite to that of the outer screw 200 .

The inner diameter of the outer screw 200 is the same as that of the inner screw 300 , but the directions of the screws are formed in opposite directions to each other, so that the joint portion of the outer screw 200 and the inner screw 300 has the same pitch. The outer screw 200 and the inner screw 300 of the present invention are in a shaftless shape without a shaft in the center, and thus, to fix them, a mutual joint portion is welded to be integrally fixed.

Referring to the enlarged view of FIG. 1 , when a plurality of different materials are input through the inlet 110 , they are transferred to the outlet 120 side by the outer screw 200 rotating by a motor, and at this time, a part of the upper layer of the material is A stirring (mixing) action is performed while being transferred in the reverse direction toward the outlet 110 by the inner screw 300 .

As such, as the transfer and stirring are repeatedly performed by the outer screw 200 and the inner screw 300 in the casing 100 , the dissimilar materials are discharged to the outlet 120 in a sufficiently stirred state.

On the other hand, the outer screw 200 and the inner screw 300 are provided to be operated in conjunction with the drive module 220, wherein the drive module 220 is installed on one side of the casing 100 and is driven by the motor M. It shows a configuration including a rotating drive wheel (222).

In FIG. 1 , the driving wheel 222 is connected to one or more ends of the outer screw 200 and the inner screw 300 to transmit the driving force of the motor M.

As such, the outer screw 200 and the inner screw 300 are configured to have a shaftless structure, and as they are provided to be flowable in the casing 100, the material of various properties is stably transported and the outer screw 200 is flexible. As it flows, it rotates in a state in close contact with the inner floor of the casing 100 , so that the material is prevented from accumulating on the inner floor of the casing 100 , so that the transport efficiency is excellent.

Figure 2 is a block diagram showing the liner member of the shaftless screw transfer device according to an embodiment of the present invention.

The shaftless structure of the outer screw 200 is sagging due to its own weight and is in contact with the inside of the casing 100, so that the inner wall of the casing 100 is worn during operation. A liner member 400 is provided.

The liner member 400 protrudes higher than the inner bottom of the casing 100 so that the outer peripheral surface of the outer screw 200 is supported in a non-contact state with the inner bottom of the casing 100 .

At this time, the liner member 400 is formed of a synthetic resin material containing polyethylene (PE) and is formed as a consumable that can be replaced when worn, and is inserted and installed into an intaglio groove formed in the longitudinal direction on the inner floor of the casing 100 as shown in FIG. 2 . flow due to rotational friction with the outer screw 200 is prevented.

As such, when the liner member 400 is configured to protrude from the inner bottom of the casing 100, the outer screw 200 is supported by the liner member 400 and rotates in a non-contact state to the inner bottom of the casing 100. Accordingly, there is an effect that can prevent damage (wear) of the inner floor of the casing 100 due to friction with the outer screw 200 and significantly lower the noise.

3 is a block diagram showing a wear correction unit of the shaftless screw feeder according to an embodiment of the present invention, and FIG. 4 shows a state in which the liner member of the screw mixer is moved up and down by the driving cylinder.

The liner member 400 may be configured such that the upward protrusion length is corrected by the wear correction unit 420 .

To this end, the wear compensating unit 420 includes a slot 421 formed on the inner bottom of the casing 100 and into which the liner member 400 is inserted, and is installed inside the slot 421 and protrudes upward by the elastic body 422 . A push plate 423 on which the output acts, one end is connected to the push plate 423, the other end is exposed to the outside of the casing 100, and includes a rod rod 424 in which a scale is displayed on the outer circumferential surface.

And the rod rod 424 is moved protrudingly into the casing 100 by the amount of wear of the liner member 400 . Accordingly, there is an advantage in that the replacement timing of the liner member 400 can be accurately detected without disassembling the casing 100 as the operator visually checks the scale to measure the wear amount of the liner member 400 .

Referring to FIG. 4 , the rod rod 424 may be provided to move up and down by a driving cylinder 426 .

At this time, when the rod rod 424 is moved upward, the outer screw 200 is moved upward by the liner member 400 as shown in FIG. 4 (a), and the outer peripheral surface of the outer screw 200 and the casing 100 The distance from the inner floor is extended.

And when the rod rod 424 is moved in the downward direction, the outer screw 200 is moved downward along with the liner member 400 as shown in FIG. 4 (b), the outer peripheral surface of the outer screw 200 and the casing 100 It is provided so that the distance from the inner floor is reduced.

When configured as described above, when the amount of material input into the casing 100 increases, the distance between the outer peripheral surface of the outer screw 200 and the inner bottom of the casing 100 is extended by the driving cylinder 426, and the outer screw 200 ) and the load applied to the inner screw 300 side can be operated in a reduced state, and when the amount of material input into the casing 100 is reduced, the outer screw 200 by the driving cylinder 426 By reducing the distance from the inner floor of the casing 100, the outer screw 200 can cleanly discharge and transport the material accumulated on the inner floor of the casing 100, so that it can be operated appropriately in the field conditions.

5 is a block diagram showing a state in which the inner screw of the shaftless screw feeder is supported by the first shaft rod according to an embodiment of the present invention, and FIG. 6 is a configuration diagram showing the arrangement structure of the first shaft rod.

5 and 6 are another embodiment of the above-described driving module 220, the driving module 220, the driving wheel 222 is installed on one side of the casing 100 is rotated by the motor (M), A driven wheel 224 installed on the other side of the casing 100 opposite to the driving wheel 222, and both ends are connected to the driving wheel 222 and the driven wheel 224 to support the inner screw 300 from the inside and a plurality of first axial rods 226 that do.

At this time, the first shaft rod 226 is arranged and fixed at equal intervals around the rotation shaft of the driving wheel 222 and the driven wheel 224, for example, the first shaft rod 226 as shown in FIG. 6 (a). The 120° isoangle is arranged in three places, or, as shown in FIG. 6 (b), the first shaft rod 226 can be arranged in four places at a 90° isometric angle.

In addition, the inner screw 300 is connected to the plurality of first shaft rods 226 to rotate, and the outer screw 200 is connected to the outer peripheral surface of the inner screw 300 .

As such, when the plurality of first shaft rods 226 are supported inside the inner screw 300, there are advantages in the following effects.

First, the outer screw 200 can significantly lower the wear rate of the liner member 400 because the inner screw 300 is supported by the first shaft rod 226, and secondly, the driving wheel 222 and the driven wheel ( 224) is supported by a bearing, so it can rotate at a higher speed than a general shaftless screw, so the feed rate of the material can be doubled. 226), so that the inner screw 300 is stirred in the circumferential direction, the material mixing efficiency is improved.

7 is a block diagram showing a structure in which first and second shaft rods are linearly reciprocated in opposite directions to each other as another embodiment of the drive module in the shaftless screw feeder.

The first shaft rod 226 is to support the inner screw 300 from the inside, and is inserted into the first guide hole 226a formed in the driving wheel 222 and the driven wheel 224 to be movable in a straight line. , any one end is exposed to the outside of the casing 100 is provided with a first cam roller (226b).

In addition, a second shaft rod 227 installed in parallel with the first shaft rod 226 to support the outer screw 200 from the inside is provided. The second shaft rod 227 is installed so that both ends are inserted into the second guide holes 227a formed in the driving wheel 222 and the driven wheel 224 to be movable in a straight line, and one end is outside the casing 100 . exposed to a second cam roller 227b is provided.

In addition, a sine plate cam wheel 228 is provided at positions corresponding to the first and second cam rollers 226b and 227b.

While the first and second cam rollers 226b and 227b are rotated together with the driving wheel 222, they ride the sinusoidal cam wheel 228 and linearly reciprocate in opposite directions.

As an example, when the first and second cam rollers 226b and 227b are provided as a pair, respectively, the sinusoidal cam wheel 228 has two top dead center and two bottom dead center alternately arranged, so that the first cam roller ( When 226b is positioned at the bottom dead center of the sine wave cam wheel 228 , the second cam roller 227b is set to be positioned at the top dead center of the sine wave cam wheel 228 .

As described above, while the outer screw 200 and the inner screw 300 are linearly reciprocated in opposite directions to each other by the first and second cam rollers 226b and 227b, the inner circumferential surface of the outer screw 200 and the outer circumferential surface of the inner screw 300 It is provided so that it is cross-transferred.

Accordingly, the action of pulverizing the material between the inner circumferential surface of the outer screw 200 and the outer circumferential surface of the inner screw 300 is performed.

If the material is not powder, but includes bulky sludge introduced from a sewage treatment plant, etc., the sludge in the form of a lump is pulverized and cut in the process of being transported in the casing 100, so that the agitation and mixing action is more effective. There is this.

As described above, in the detailed description of the present invention, the most preferred embodiment of the present invention has been described, but various modifications may be made within the scope not departing from the technical scope of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but the protection scope should be recognized from the techniques of the claims to be described later and equivalent technical means from these techniques.

100: casing
110: entrance 120: exit
200: outer screw
220: drive module 222: drive wheel 224: driven wheel
226: the first axis 226a; First guide hole 226b: first cam roller
227: second shaft rod 227a: second guide hole 227b: second cam roller
228: cam wheel
300: inner screw
400: liner member
420: wear compensation unit 421: slot 422: elastic body
423: push plate 424: rod rod 426: drive cylinder

Claims (6)

A plurality of inlets 110 are formed on one side, two or more kinds of materials are input, and an outlet 120 is formed on the other side of the casing 100 which is provided to discharge the mixed material;
an outer screw 200 that is installed adjacent to the inner wall of the casing 100, is rotated by the driving module 220, is spirally formed and is provided to transport the material toward the outlet 120;
an inner screw 300 installed in the outer screw 200 and spirally formed in the opposite direction to the outer screw 200 to stir and transfer a part of the material toward the inlet 110 ; and
It is provided on the inner bottom of the casing 100, and a liner member 400 that protrudes higher than the inner floor; includes;
The liner member 400 has the upward protrusion length corrected by the wear correction unit 420,
The wear compensating unit 420 includes a slot 421 formed on the inner bottom of the casing 100 and into which the liner member 400 is inserted, and an upward protruding force by the elastic body 422 installed inside the slot 421 . It is composed of a push plate 423 that acts and a rod rod 424 having one end connected to the push plate 423 and the other end exposed to the outside of the casing 100 and marked with a scale on the outer circumferential surface, and the rod rod 424 is A shaftless screw transfer device, characterized in that it is moved to the inside of the casing (100) by the amount of wear of the liner member (400), and is provided to measure the amount of wear of the liner member (400) through a scale.
delete delete The method of claim 1,
The rod rod 424 is provided to be moved up and down by the driving cylinder 426 , and when the rod rod 424 moves in the upward direction, the outer screw 200 is moved by the liner member 400 by the liner member 400 . As it moves upward, the distance between the outer peripheral surface of the outer screw 200 and the inner bottom of the casing 100 is extended, and when the rod rod 424 moves downward, the outer screw 200 together with the liner member 400 is moved in the downward direction, so that the distance between the outer circumferential surface of the outer screw 200 and the inner bottom of the casing 100 is reduced.
The method of claim 1,
The driving module 220 includes a driving wheel 222 installed on one side of the casing 100 and rotated by a motor M, and a driven wheel installed on the other side of the casing 100 opposite to the driving wheel 222 . (224), and both ends are connected to the driving wheel (222) and the driven wheel (224), shaftless screw feed, characterized in that it comprises a plurality of first shaft rods (226) for supporting the inner screw (300) from the inside Device.
6. The method of claim 5,
The first shaft rod 226 is inserted into the first guide hole 226a formed in the driving wheel 222 and the driven wheel 224 to be movable in a straight line, and one end is exposed to the outside of the casing 100 . and a first cam roller 226b is provided,
A second shaft rod 227 installed in parallel with the first shaft rod 226 to support the outer screw 200 from the inside is provided, and both ends of the second shaft rod 227 are a driving wheel 222 and a driven wheel. It is inserted into the second guide hole 227a formed in the 224 and is installed to be movable in a straight line, and one end is exposed to the outside of the casing 100 so that a second cam roller 227b is provided,
A sinusoidal cam wheel 228 is provided at positions corresponding to the first and second cam rollers 226b and 227b, and the first and second cam rollers 226b and 227b rotate together with the driving wheel 222. The sine wave cam wheel 228 is provided to reciprocate linearly in the opposite direction, and the outer screw 200 and the inner screw 300 are linearly moved in the opposite direction by the first and second cam rollers 226b and 227b. While reciprocating, the inner peripheral surface of the outer screw 200 and the outer peripheral surface of the inner screw 300 are cross-transferred and the material is pulverized by the shearing principle.

Images