JPH03284519A - Vertical screw conveyor - Google Patents

Abstract

PURPOSE:To perform dehydration without clogging and reduce power in a vertical screw conveyor with dehydrating function for water-containing sediment by forming vertical slits in a cylindrical casing provided with a screw blade, and inserting and disposing linear materials in the slits in such a manner as to be capable of leaving. CONSTITUTION:A plurality of slits 11 ar vertically formed around the middle position of a cylindrical casing 1 provided with a screw blade 3, and flat bars 12 are disposed in the slits 11 in such a manner as to be capable of leaving, respectively. Ring holding members 13 for guiding the outer circumferential part of each flat bar 12 are also provided in the upper and lower end parts and middle part of each slit. Projections 15, 16 operated by the contact with the screw blade 3 are provided at integral multiple intervals of a blade pitch P to form the leaving means of the slit 11. According to this constitution, water is removed through the slits, the flat bars can be advanced and retreated by the projections, so that dehydration can be performed without clogging, and the power can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vertical screw conveyor with a dewatering function.

2. Description of the Related Art Conventionally, vertical screw conveyors have been used to transport, for example, earth and sand from underground to above ground.

That is, this vertical screw conveyor had screw blades rotated by a rotary drive device arranged in a cylindrical casing provided in the vertical direction.

Problems to be Solved by the Invention According to the above-mentioned vertical screw conveyor, when the soil to be conveyed contains a large amount of water (for example, when excavated soil is conveyed from underground to above ground), water may be mixed with the soil and sand. Since water is also transported, there are problems in that wasteful power is required and dehydration equipment is required to remove water from the soil after transport.

Therefore, an object of the present invention is to provide a vertical screw conveyor that can solve the above problems.

Means for Solving the Problems In order to solve the above problems, a first means of the present invention provides a vertical screw conveyor in which screw blades are rotatably arranged in a vertical cylindrical casing. A plurality of vertical slits are formed around a predetermined position of the casing, and strips are arranged in each of these slits so that they can move in and out, and these strips are inserted through an annular holding member arranged on the outer periphery of the slits. held on the cylindrical casing side,
An upper protrusion is formed at the inner circumferential position of each of the above-mentioned strips, and a lower protrusion is formed at the inner circumference position downward from the upper protrusion by a distance that is an integral multiple of the blade pitch of the screw blade, and each of the above-mentioned protrusions This is a vertical screw conveyor in which the inner diameter of the cylindrical surface including the inner end is smaller than the outer peripheral diameter of the screw blade.

Further, a second means of the present invention is a vertical screw conveyor in which screw blades are rotatably arranged in a vertical cylindrical casing, and a vertical slit is provided at a predetermined position of the cylindrical casing. This is a vertical screw conveyor in which a plurality of screw conveyors are formed, and a strip is arranged in each of these slits, and an egress/return drive device is provided for moving the strips into and out of a cylindrical casing.

Effect According to the configuration of the first means described above, a vertical slit is formed in the cylindrical casing, and the strip material is arranged within this slit, so that the conveyance is carried from the bottom to the top inside the cylindrical casing. Moisture contained in materials such as earth and sand is discharged to the outside of the cylindrical casing through the gap between the slit and the strip. Furthermore, during conveyance, the protrusions provided on the inner circumference of the strip are guided by the outer circumferential surface of the screw blade and moved in and out of the slit, thereby preventing clogging with earth and sand.

Further, according to the configuration of the second means, similarly to the first means, the conveyed material is dehydrated in the slit portion, and
The strip is moved in and out of the cylindrical casing by the ejection/retraction drive device, thereby preventing clogging thereof.

EXAMPLE A first example of the present invention will be described below with reference to FIGS. 1 to 4.

In FIGS. 1 and 2, reference numeral 1 denotes a cylindrical casing supported vertically on the side of a support frame 2, inside which a screw blade 3 is rotatably provided via a bearing (not shown). A first rotation drive device (an electric motor or a hydraulic motor) 4 for rotating the screw blade 3 is provided on the support frame 2 side. Further, the cylindrical casing 1 is composed of an upper end fixing part 5 having a discharge port 5a, and a transport rotating part 6 where transport is performed.
This conveying rotation unit 6 is rotated by a second rotational drive device (an electric motor or a hydraulic motor) 9 via a ring gear 7 and a pinion 8. The reason why most of the cylindrical casing 1 is rotated in this way is that when transporting earth and sand, by rotating it in the same direction as the screw blade 3 and at a rotation speed different from that of the screw blade 3, the relative relationship between the two can be adjusted. This is to reduce the speed difference and reduce the wear that occurs when transporting earth and sand. This effect is particularly significant when the conveyed object is hard.

As shown in FIGS. 3 and 4, a plurality of vertical slits 11 are formed at a predetermined height around an intermediate position of the cylindrical casing 1. As shown in FIGS. In each of these slits 11, flat pars (stripe members) 12 are arranged so as to be retractable and retractable, and an annular holding member for guiding the outer circumference of each flat par 12 is provided at the upper and lower ends and in the middle part. 13 is provided, and each annular holding member 13 is provided with a supporting member 14 provided on the cylindrical casing 1 side.
Supported by Furthermore, an upper protrusion 5 having a smooth inclined surface is formed at the inner peripheral position of each of the flat pars 12, and from these upper protrusions 15 to an integer multiple of the blade pitch (P) of the screw blade 3 ( A lower protrusion 16 having a smooth inclined surface is also formed at the inner circumferential position below by a distance (N The circumferential diameter A is smaller than the outer circumferential diameter B of the screw blade 3.

Note that the width of the flat par 12 is slightly narrower than the groove width of the slit 11. A plurality of raking blades 10 for raking earth and sand are spirally provided at the lower end of the cylindrical casing 1.

Therefore, in the above configuration, when the screw blade 3 and the cylindrical casing 1 are rotated at high speed, the earth and sand taken in from the lower end surface of the cylindrical casing 1 are sequentially transported from underground to above ground due to the difference in rotation between the two. When the earth and sand rise to the slit 11 during transportation, the water contained in the earth and sand is discharged from the gap between the slit 11 and the flat parr 12 by centrifugal force, and the earth and sand are dehydrated. In this slit portion, due to the rotation of the screw blade 3, the flat parr 12, which is integrally guided by the annular holding member 13, is moved by its projection 15.1.
6 are sequentially pushed out to the outside, and the flat pars 12 on the opposite side are pulled inward, that is, each flat par 12 is moved in and out of the slit 11, thereby preventing clogging with earth and sand.

In this way, since the slit portion for dewatering is provided at a location where the earth and sand transport path is spiral, the dewatering time can be extended.

Further, the centrifugal acceleration applied to the powder such as earth and sand by the rotation of the screw blades is about several logs, and the dehydration level is slightly higher than that of a general centrifugal dehydrator.

Next, a second embodiment of the present invention will be described based on FIGS. 5 and 6.

In the first embodiment described above, the rotational driving force of the screw blade itself was used to move the flat par in and out, but in the embodiment of Sui-Tei 2, a separate drive device for moving the flat par in and out is used. It has been established.

That is, the flat pars 12 are disposed in the slits 11 of the cylindrical casing 1 so as to be freely retractable, and the guide holes 22 that fit around the entire flat pars 12 are located at eccentric positions in the upper, lower, and middle portions of the outer peripheral surface of the flat pars 12. A ring gear 21 provided thereon and having teeth 21a formed on its outer periphery is slidably supported by a support member 23 provided on the cylindrical casing 1 side. Furthermore, tooth portions 21 of each ring gear 21 are provided at appropriate positions on the outer periphery of the slit portion of the cylindrical casing 1.
A rotating shaft body 25 having a driving pinion 24 that meshes with a.
is provided in the vertical direction, and a third rotation drive device (for example, an electric motor is used to rotate this rotation shaft body 25, and in this case, since the cylindrical casing 1 itself rotates, power is supplied through the slip ring. ) 26 is attached to the cylindrical casing 1 side. Note that a plurality of guide pinions 27 for guiding each of the ring gears 21 are arranged on the cylindrical casing 1 side. Further, the center of the screw blade 3 and the center of the ring gear 21 are aligned, and the guide hole 22 of the ring gear 21 is eccentric with respect to the center of the screw blade 3.

Therefore, when transporting earth and sand, the earth and sand are dehydrated in the slit section as in the first embodiment, and furthermore, the ring gear 21 is constantly rotated by the drive of the third rotational drive device 26, and the flat parr 12 is moved into the slit 11. This prevents dirt from clogging the slit 11.

Note that the movement of the flat parr 12 to the outside of the cylindrical casing 1 is performed by movement of earth and sand to the outside by centrifugal force.

Further, the ring gear 21, the driving pinion 24, the third
Although the egress/retraction drive device is constituted by the rotary drive device 26 or the like, it may be one that employs, for example, a chain transmission mechanism.

Next, a third embodiment of the present invention will be described based on FIGS. 7 and 8.

In the second embodiment, the flat par 12 is moved in and out of the slit 11 through the guide hole 22 formed in the ring gear 21 at an eccentric position. , the flat par 12 is moved in and out using a cylinder device.

That is, the tapered portions 1 are provided at the upper and lower ends of each flat parr 12.
2a and 12b, and an upper tapered portion 12a.
When the upper elevating ring 31 is fitted from above,
A lower elevating ring 32 is fitted onto the lower tapered portion flb from below, and air cylinders 33 and 34 for elevating and lowering the upper and lower elevating rings 31 and 32 are attached to the outer peripheral surface of the cylindrical casing 1, respectively.

In this case, the elevating/lowering rings 31, 32, air cylinders 33, 34, etc. constitute an egress/retreat drive device.

Therefore, when transporting earth and sand, the earth and sand are dehydrated in the slit section, as in the above embodiment, and the air cylinders 33 and 34 constantly operate the upper and lower lifting rings 31.
．． 32 are raised and lowered (approached and separated from each other in the vertical direction), the flat parr 12 is moved in and out of the slit 11, and clogging of the slit 11 with earth and sand is prevented. In this case as well, the movement of the flat par 12 to the outside is performed by movement of earth and sand.

In addition, in the third embodiment, each elevating ring 31
．． Air cylinder 33.34 to raise and lower 32
However, when the cylindrical casing 1 itself rotates, as shown in FIG. and then connect this threaded rod 36 to the motor 3.
7 may be used.

By the way, as shown in FIGS. 10 and 11, in each of the above embodiments, a stopper pin 41 is provided protruding from an appropriate position on the side of the flat par 12 to prevent it from penetrating too much into the cylindrical casing 1. Bye.

Further, in each of the above embodiments, the length of the slit 11 was set to a certain range of the conveying rotation part 6 of the cylindrical casing 1;
For example, the slit 11 may be formed along almost the entire length of the conveyance rotating section 6.

Further, in each of the above embodiments, the cylindrical casing 1 itself is rotated, but the cylindrical casing 1 does not need to be rotated. In this case, it is not necessary to provide the scraping blades 10 at the lower end of the cylindrical casing 1.

Further, in each of the above embodiments, the conveyed object is described as earth and sand, but it is of course applicable to conveying objects other than earth and sand.

Effects of the Invention As described above, according to the structure of the present invention, a plurality of vertical slits are formed in the cylindrical casing, and a strip is inserted into each of these slits, and these slits are moved in and out. Therefore, the conveyed object, such as earth and sand, can be dehydrated without clogging the slit, and therefore, unnecessary power and special dewatering equipment are not required.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention,
Figure 1 is a partially cutaway overall side view, Figure 2 is I-I of Figure 1.
A sectional view, Fig. 3 is a half sectional view of the slit part, and Fig. 4 is a 3rd sectional view.
The ■-■ cross-sectional view, FIGS. 5 and 6 are the second embodiment of the present invention.
Fig. 5 is a sectional view of the main part, Fig. 6 is a sectional view taken along the line m-■ in Fig. 5, and Figs. 7 and 8 show a third embodiment of the present invention. FIG. 7 is a sectional view of a partially cutaway essential part, FIG. 8 is a sectional view taken along IV-IV in FIG. 11 is a side view of the slit portion, and FIG. 11 is a sectional view taken along the line ■-■ in FIG. 10. DESCRIPTION OF SYMBOLS 1... Cylindrical casing, 3... Screw blade, 4... First rotation drive device, 6... Transport rotation part, 9... Second rotation drive device, 11. ... Slit, 12 ... Flat par 13 ... Annular holding member, 15 ... Upper projection, 16 ... Lower projection, 2
1...Ring gear, 21a...Tooth section, 22...
...Guide hole, 24...Driving binion, 25...
...Rotating shaft body, 26...Third rotation drive device, 31.
... Upper lifting ring, 32... Lower lifting ring,
33.34...Air cylinder 37...Electric motor. -141- 5th Fig. 2f---Rishiwa gear Zta-1 armrest 1 Shock 22-force pad 4 door φ (26 No. 3 rotation St movement 1 Fig. 6 Fig. 9 Fig. 3f (32) Fig. 10 @ll 4

Claims (1)

[Claims] 1. In a vertical screw conveyor in which screw blades are rotatably arranged in a vertical cylindrical casing, a plurality of vertical slits are formed around predetermined positions of the cylindrical casing. The strips are arranged in such a manner that they can move in and out of each of these slits, and these strips are held on the cylindrical casing side via an annular holding member arranged on the outer periphery of the slits, and the inner periphery of each of the strips is a cylindrical shape including an inner end of each of the projections; The inner diameter of the surface is
A vertical screw conveyor characterized in that the outer diameter of the screw blade is smaller than the outer diameter of the screw blade. 2. In a vertical screw conveyor in which screw blades are rotatably arranged in a vertical cylindrical casing, a plurality of vertical slits are formed at predetermined positions in the cylindrical casing, and a plurality of vertical slits are formed in each of these slits. A vertical screw conveyor characterized by having strips arranged therein and an egress/return drive device for moving the strips into and out of a cylindrical casing.