KR102020198B1 - Shaftless screw conveyor - Google Patents

Abstract

The present invention relates to a shaftless screw conveyor comprising: a casing having an inlet and an outlet; a shaftless screw which is axially installed in the casing, receives driving power of a drive motor to be rotated, and transports and guides sewage sludge from the inlet towards the outlet; and a fracture detection unit to detect whether the shaftless screw is fractured. Unlike a conventional technique, one or more proximity sensors are arranged in an axial direction to sense whether the shaftless screw rotates to check the fracture status of the shaftless screw to improve maintenance and repair of the shaftless screw. A liner is arranged on a lower side in the casing to prevent damage to the shaftless screw by a collision between the shaftless screw and the casing. Abrasion checking members of different colors are inserted into an abrasion pad to easily check an abrasion degree of the liner to easily identify replacement time of the liner with naked eyes.

Description

Shaftless Screw Conveyor {SHAFTLESS SCREW CONVEYOR}

The present invention relates to a spindleless screw conveyor, and more particularly, to a casingless screw by detecting whether the spindleless screw is broken by detecting whether the spindleless screw is rotated by providing at least one proximity sensor along the axial direction of the casing. Improves maintainability of the casing and prevents breakage of the spindleless screw due to bumping of the spindleless screw and the casing by arranging the liner inside the casing, and makes it possible to easily check the wear of the liner. By inserting a wear check member of the present invention relates to a shaftless screw conveyor that can easily grasp the replacement time of the liner with the naked eye.

In general, a spindleless conveyor means a series of device configurations in which a spindleless screw supported by a drive shaft bearing is mounted in a casing, and a package is transported by a rotational motion by the spindleless screw.

Therefore, such a spindleless screw conveyor has a simple beam structure without a spindle, and thus is not affected by the bending and eccentric deformation of the shaft, and can be continuously operated differently, as well as having a large structural feature of the transportation volume ratio. It is generally installed in environmental facilities such as sewage treatment plants, waste incineration plants, slaughterhouses, and is widely used for transporting and treating sewage sludge.

Conventional shaftless screw conveyor is made by attaching a liner to prevent the wear damage of the casing on the inner lower surface of the casing under the condition that the casing having a predetermined length is formed, and by mounting the shaftless screw on the upper portion of the liner will be.

A shaftless screw conveyor has been proposed in Korean Patent Registration No. 10-0584529 (name of the invention: a method for manufacturing a liner for a shaftless screw conveyor).

The above technical configuration is a background art for helping understanding of the present invention, and does not mean a conventional technology well known in the art.

Existing shaftless screw conveyor can be broken by the vibration and the compressive force and consolidation force generated when the sludge is transported inside the casing by mounting the screw without shaft, and the operator immediately checks whether the shaftless screw is broken. There is a problem that is difficult to do.

Therefore, there is a need for improvement.

The present invention has been made in order to improve the above problems, the casing is provided with one or more proximity sensors along the axial direction to detect the rotation of the spindle-free screw, or load the casing with the proximity sensor in the axial direction by section By arranging the load sensor so as to detect the error, the spindleless screw to improve the maintainability of the spindleless screw can be confirmed in real time accurately by the signal of either the proximity sensor or the load sensor. The purpose is to provide a conveyor.

The present invention is to arrange the liner on the inner lower side of the casing to prevent breakage of the screwless screw due to the bumping of the screwless casing and the casing, and wear confirmation member of different colors on the inner side of the wear pad to easily check the wear of the liner It is an object of the present invention to provide a screwless screw conveyor that is intended to easily understand the replacement time of the liner by inserting a.

A spindleless screw conveyor according to the present invention comprises: a casing having an inlet and an outlet;

An axisless screw installed in the casing in the axial direction and rotating to receive a driving force of a driving motor, and configured to guide sewage sludge from the inlet to the outlet; And a break detection unit for detecting whether the spindleless screw is broken.

The casing is characterized in that the liner screw is provided on the inner surface to prevent the spindle-free screw is bent downward and in contact with the inner surface of the casing.

The break detection unit may include: a proximity sensor disposed at least one along the axial direction of the casing, and detecting a break of the spindleless screw by detecting a state in which the spindleless screw is not rotated when the driving motor is driven; And by the proximity sensor, a control unit for controlling to stop the drive of the drive motor by a corresponding signal when the continuous screw is continuously detected or not detected within a predetermined time range.

A plurality of break detection units are provided on the lower circumferential surface along the axial direction of the casing, and the load detection unit checks whether the non-screw shaft screw is broken by comparing the load within the set range of the sewage sludge to be transported with the detection for each section. It includes a sensor.

The bracket for fixing the liner or the liner to the casing is provided with an overflow preventing member along both edges to prevent sewage sludge from overflowing into the gap between the casing and the liner. do.

As described above, the spindleless conveyor according to the present invention, unlike the prior art, is provided with one or more proximity sensors along the axial direction of the casing to detect whether the spindleless screw is rotated, or the casing together with the proximity sensor in the axial direction. By arranging the load sensor to detect the load for each section, it is possible to accurately check the breaking state of the spindleless screw in real time by the signal of the proximity sensor or the load sensor, thereby improving the maintenance of the spindleless screw. have.

The present invention is to arrange the liner on the inner lower side of the casing to prevent breakage of the screwless screw due to the bumping of the screwless casing and the casing, and wear confirmation member of different colors on the inner side of the wear pad to easily check the wear of the liner By inserting the liner replacement time can be easily seen with the naked eye.

1 is a plan view of a spindleless screw conveyor according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1.
3 is an enlarged longitudinal sectional view of FIG. 2.
4 is a cross-sectional view taken along line BB of FIG. 1.
FIG. 5 is an enlarged view of 'A' of FIG. 4.
6 is a cross-sectional view showing a state in which the screwless screw is broken according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a spindleless screw conveyor according to the present invention. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, the definitions of these terms should be made based on the contents throughout the specification.

1 is a plan view of a spindleless screw conveyor according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1, and FIG. 3 is an enlarged longitudinal sectional view of FIG.

4 is a cross-sectional view taken along the line B-B of FIG. 1, and FIG. 5 is an enlarged view 'C' of FIG.

6 is a cross-sectional view showing a state in which the screwless screw is broken according to an embodiment of the present invention.

1 to 6, the no-screw screw conveyor 10 according to an embodiment of the present invention is installed in an environmental facility such as a sewage treatment plant, a waste incinerator, a slaughterhouse, and used to transport and process sewage sludge. , Casing 20, spindleless screw 30, liner 100, and break detection unit 200.

The casing 20 is circular in cross section, forms an inner space in the axial direction, forms an inlet 22 on one side in the axial direction, and forms an outlet 24 on the other side.

Inlet 22 serves to receive sewage sludge or cake, and outlet 24 serves to allow discharge of sewage sludge or cake. Of course, the inlet 22 and the outlet 24 may be modified in various shapes, the casing 20 is applicable to various shapes and various materials.

At this time, as the outlet 24 is formed at the lower side of the other side of the casing 20, the casing 20 is supported by the support 26 to be spaced apart from the bottom. Support 26 serves to support the casing 20 in contact with the floor or the workshop. The support 26 is deformable in various shapes and does not limit the number provided.

In addition, the spindleless screw 30 is installed in the casing 20 in the axial direction and is rotated by receiving the driving force of the driving motor 34. In particular, the spindleless screw 30 guides the sewage sludge from the inlet 22 to the outlet 24 only to the shaftless wing 32 formed along the spiral trajectory with the shaft removed.

In particular, the spindleless screw 30 is rotated in the circumferential direction while being supported by the inner side of the casing 20 as it is subjected to a downward bending force because there is no spindle.

At this time, the inner surface of the casing 20 is made of the same or similar curved surface of the spiral trajectory of the spindleless wing (32).

On the other hand, when the spindleless screw 30 is in direct contact with the inner surface of the casing 20 made of a metal material, the spindleless wing 32 and the casing 20 are deformed or damaged by friction.

Accordingly, the casing 20 has a liner 100 on the inner side thereof.

The liner 100 serves to protect the spindleless wing 32 and the casing 20 through direct contact with the spindleless wing 32.

At this time, the liner 100 is made of a material that is worn in contact with the rotating shaftless wing 32 to protect the shaftless screw 30.

In particular, the liner 100 should be replaced to protect the spindleless wing 32 when worn over a certain amount.

Accordingly, the liner 100 includes a wear pad 110, a wear check member 120, a restraining member 130, and an overflow preventing member 140.

The wear pad 110 is in contact with the spindleless wing 32, the upper side is rotated, the lower side is in contact with the inner bottom surface of the casing (20). At this time, the wear pad 110 is to be provided over the inner bottom surface of the casing 20 and a part of both inner side surfaces. The wear pad 110 is formed of the same color.

In particular, the wear pad 110 is preferably made of a material having flexibility as it is seated on the inner surface of the curved casing 20. The wear pad 110 may be applied to various materials such as rubber or synthetic resin to be worn without damaging the spindleless wing 32 to be rotated.

The wear checking member 120 is provided on the wear pad 110 or the bottom surface of the casing 20 corresponding to a portion contacting the curved bottom surface of the casing 20.

At this time, the wear check member 120 is made of a different color than the wear pad 110. Thus, when the wear pad 110 wears to a certain depth by friction with the spindleless wing 32, the wear check member 120 is exposed, and through this, the wear check member 120 is clearly revealed due to other colors. By visually checking), it is possible to grasp when to replace the liner 100.

Of course, the wear check member 120 may be made of the same material or different materials as the wear pad 110.

Meanwhile, the wear checking member 120 may be manufactured by insert injection molding into the wear pad 110, but the manufacturing cost increases. Thus, after the wear check member 120 and the wear pad 110 are manufactured, the wear check member 120 is axially inserted into the lower side of the wear pad 110. As a result, the wear pad 110 forms the insertion groove 112 to accommodate the wear check member 120.

Of course, the wear checking member 120 may be provided in plural wear pads 110 along the axial direction of the casing 20, or may be provided with a length similar to the axial direction of the wear pad 110.

In addition, when the wear check member 120 is formed in a bar-type (bar-type) is in contact with the entire surface in the circumferential direction from the inner surface of the insertion groove 112 when inserted into the insertion groove 112, wear confirmation member ( 120 is not easily inserted by friction. Then, it is not possible to check whether the wear checking members 120 and 120 are properly inserted into the insertion groove 112.

Therefore, the insertion groove 112 is formed to open to the lower side of the wear pad 110. Thus, the operator can easily check the state that the wear check member 120 is inserted into the insertion groove 112, the frictional force by reducing the circumferential contact between the inner surface of the insertion groove 112 and the wear check member 120. Can be reduced.

On the other hand, the wear check member 120 is inserted into the insertion groove 112 is provided so as not to be separated in the downward direction of the wear pad (110).

That is, the open lower side of the insertion groove 112 has a first inclined surface 114 to be symmetrical with each other the inner surface facing the insertion groove 112 so that the cross-sectional area is reduced toward the lower direction.

In addition, the wear checking member 120 forms a second inclined surface 124 which is symmetrically interviewed with the corresponding first inclined surface 114. Since the second inclined surface 124 is caught while being interviewed by the first inclined surface 114, the wear checking member 120 is prevented from being separated from the wear pad 110 in a downward direction.

In addition, the wear pad 110 in which the wear checking member 120 is inserted into the shaft should be fixed to the inner surface of the casing 20. This is to prevent the wear pad 110 from randomly moving in the circumferential direction due to friction with the spindleless wing 32.

For example, the casing 20 includes a restraining member 130 that restrains both sides of the wear pad 110 to prevent movement of the wear pad 110 due to friction caused by the rotation of the spindleless wing 32. . That is, the restraining member 130 binds both sides of the wear pad 110 to the inner surface of the casing 20 in the rotational direction of the spindleless wing 32.

Here, the restraining member 130 is coupled to each of both sides of the wear pad 110 and the bracket 132 in contact with the inner surface of the casing 20, and each of the bracket 132 and the wear pad 110 and the casing 20 It includes a coupling member 134.

That is, the bracket 132 binds the edge of the wear pad 110 while being detachably coupled to the casing 20 by the coupling member 134. Thus, the wear pad 110 is fixed in position inside the casing 20, and maintains the unfolded state. Coupling member 134 is assumed to be a mechanical fastening element such as a bolt.

In addition, in the bracket 132 which binds the liner 100 or the liner 100 in close contact with the casing 20, sewage sludge overflows into the upper portion of the wear pad 110 in the casing 20, and the casing 20 is provided. In order to prevent the inflow into the gap between the wear pad 110, the overflow preventing member 140 is provided along both edges.

Accordingly, as the spindleless wing 32 rotates, even if the sewage sludge is moved upward in the wear pad 110, the overflow preventing member 140 serves to prevent further upward movement of the sewage sludge.

For convenience, the overflow preventing member 140 is to extend from the bracket 132. At this time, the overflow preventing member 140 extends inclined in the upper direction of the spindleless wing 32 in the bracket 132. Of course, the overflow preventing member 140 can be modified in various shapes.

On the other hand, the spindleless wing 32 is inserted into the casing 20, which is relatively long in the axial direction and may be broken due to the consolidation force and the compressive force generated during its own vibration and movement of sewage sludge.

When the spindleless wing 32 breaks, the operator must quickly replace the spindleless screw 30.

To this end, the break detection unit 200 is provided. The break detection unit 200 detects whether the spindleless wing 32 of the spindleless screw 30 is broken and forcibly stops the spindleless wing 32 immediately after the detection. Thus, the worker can recognize that the spindleless wing 32 is broken (cut).

In detail, the break detection unit 200 includes a proximity sensor 210, a load detection sensor 220, and a controller 230.

At least one proximity sensor 210 is disposed along the axial direction of the casing 20, and the spindleless wing 32 is detected by detecting a state in which the spindleless wing 32 does not rotate even when the driving motor 34 is driven. It is to check (detect) the breakage of That is, when the spindleless wing 32 is normally rotated in the circumferential direction, the proximity sensor 210 detects (ON) the spindleless wing 32 of the corresponding site (ON), and repeatedly generates a signal that is not detected (OFF). do.

Thus, when the proximity sensor 210 is in a state where the drive motor 34 is driven, the axisless wing 32 is continuously detected (ON) or not detected (OFF) for a predetermined time, the axisless wing 32 ) Is broken.

Of course, the number of proximity sensors 210 installed in the casing 20 is not limited.

In addition, the load sensor 220 is in contact with the lower surface of the casing 20 while being installed on each or a portion of the support 26, by comparing the load within the set range of the sewage sludge to be transported with the detection for each section, It serves to check (detect) whether the spindleless wing 32 of the spindle screw 30 is broken.

That is, after a certain time, the casing including the self-weight of the casing 20 including the sewage sludge detected by any one of the load sensor 220, and the sewage sludge detected by the load sensor 220 of the other ( If the difference in the self weight of 20) is outside the set range, the spindleless wing 32 is detected as broken.

The controller 230 controls to stop driving of the driving motor 34 immediately after checking the breaking state of the spindleless screw 30 by the detection of the proximity sensor 210 or the load sensor 220.

When the driving motor 34 is stopped by the signal of the control unit 230, the operator at least of the signal (information) generated by the proximity sensor 210 and the signal (information) generated by the load sensor 220 Through either signal it can be confirmed that the spindleless wing 32 is broken.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. Will understand. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

10: spindleless screw conveyor
20: casing 26: support
30: screwless screw 32: screwless wing
34: drive motor 100: liner
110: wear pad 120: wear check member
130: restraining member 132: bracket
134: coupling member 140: overflow prevention member
200: break detection unit 210: proximity sensor
220: load detection sensor 230: control unit

Claims (5)

A casing having an inlet and an outlet; An axisless screw installed in the casing in the axial direction and rotating to receive a driving force of a driving motor, and configured to guide sewage sludge from the inlet to the outlet; And a break detection unit for detecting whether the screwless screw is broken,
The casing is provided with a liner on the inner side to prevent the spindle-less screw is bent downward and contact with the inner side of the casing,
The bracket for fixing the liner or the liner to the casing is provided with an overflow preventing member along both edges to prevent sewage sludge from overflowing into the gap between the casing and the liner. Shaftless screw conveyor.
delete The method of claim 1, wherein the break detection unit,
At least one proximity sensor disposed along an axial direction of the casing to detect a state in which the spindleless screw does not rotate when the driving motor is driven, thereby confirming breakage of the spindleless screw; And
And a control unit for controlling, by the proximity sensor, to stop the driving of the drive motor by a corresponding signal when continuously detecting or not detecting the spindleless screw within a predetermined time range. .
The method of claim 3, wherein
A plurality of break detection units are provided on the lower circumferential surface along the axial direction of the casing, and the load detection unit checks whether the non-screw shaft screw is broken by comparing the load within the set range of the sewage sludge to be transported with the detection for each section. Includes a sensor,
The control unit is a spindle-free screw conveyor characterized in that the control to stop the drive of the drive motor immediately after confirming the breaking state of the screwless screw by the detection of the proximity sensor or the load sensor.
delete

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