JP2005090289A - Slurry transfer device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slurry transfer device capable of suppressing increase in the specific gravity of a slurry while reducing wear of insides of piping or casing. <P>SOLUTION: The transfer device 10 is equipped with the casing 11 and a rotary cylinder 12. The rotary cylinder 12 is rotatably stored inside the casing 11, and has a main body 12a and a through-hole 12b. Recessed grooves 12e, 12f are provided on the outer peripheral surface of the main body 12a, and a plurality of rotary wings 12g are protrudingly provided thereinside. In each of the recessed grooves 12e, 12f, a supply port 24 and an exhaust port 26 of pressurized fluid penetrating a cylinder body 11a of the casing 11 and communicating with the grooves are provided. A ribbon type impeller 12h is provided in the through-hole 12b. The impeller 12h transfers the slurry S taken in through an intake port 14 to an exhaust port 16 side by rotating the rotary cylinder 12. In the transfer device 10, when pressurized fluid such as compressed air is supplied to the recessed grooves 12e and 12f through the supply port 24, the pressurized fluid injects onto the rotary wings 12g and the rotary cylinder 12 can be rotatingly driven. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a slurry transfer device, and more particularly to a transfer device used for transporting slurry containing excavated earth and sand or mud water generated in shield construction or the like.

  A mud shield method is known as a type of construction method used when constructing a subway tunnel or the like in an urban area. For example, Non-Patent Document 1 discloses an example thereof.

  When a tunnel is constructed by the muddy water shield method, the excavated earth and sand excavated by the shield machine is mixed with muddy water to form a slurry and discharged to the outside through a mud drain pipe.

  In this case, the slurry is pumped to the shaft side by installing a mud pump in the middle of the mud pipe. As a wastewater pump used for such an application, a type of a system in which an impeller is rotationally driven by an electric motor is generally employed.

However, the conventional slurry transporting sludge pump configured as described above has the following problems.
"Encyclopedia of Civil Engineering Law Revision V" Industry Survey September 2001 issue 640-641p

  That is, the conventional sludge pump has a structure in which the slurry is taken in from the impeller rotational axis direction and discharged in the circumferential direction of the impeller, so that the slurry flow changes from horizontal to vertical or from vertical to horizontal. For this reason, wear in the piping and pump casing increases.

  In addition, the mud mass contained in the slurry is sandwiched between the impeller and the casing and becomes impossible to rotate, or the slurry is stirred and mixed, and the specific gravity of the mud water becomes excessively large, so that the transport is possible. There was a problem that became difficult.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to suppress an increase in the specific gravity of the slurry while reducing wear in the piping and the casing. To provide a slurry transfer device.

  To achieve the above object, the present invention provides a cylindrical casing having a slurry inlet at one end and a slurry outlet at the other end, and a cylindrical rotation housed in the casing. A slurry transfer device that rotationally drives the rotary cylinder by supplying a pressurized fluid such as compressed air or oil between the cylinder and the casing and the rotary cylinder, and one end of the rotary cylinder is introduced into the rotary cylinder The other end communicates with the discharge port, and a through-hole that linearly penetrates in the axial direction is provided, and the slurry taken in via the intake port on the inner peripheral surface of the through-hole, A ribbon impeller that is moved to the discharge port side by rotating the rotating cylinder is provided.

  According to the slurry transfer device configured as described above, the rotary cylinder is provided with a through hole that has one end communicating with the intake port and the other end communicating with the discharge port and linearly penetrating in the axial direction. Since the ribbon impeller that moves the slurry taken in through the intake port to the discharge port side by rotating the rotary cylinder is provided on the inner peripheral surface, the slurry is linearly penetrated in the axial direction Can be transferred without conversion.

  In this case, since the slurry is transferred to the discharge port side by rotating the rotating cylinder with a ribbon impeller, wear in the piping and casing does not occur like mud pump, and mud blocks are sandwiched. Since it does not become non-rotatable and almost no stirring and mixing occurs, the specific gravity of the slurry does not increase.

  The rotation driving portion of the rotating cylinder is provided so as to circulate around the outer peripheral surface of the rotating cylinder, and is provided with a concave groove that is separated from the outside through a sealing material, and in the concave groove, A plurality of rotating blades that protrude radially outward from the center of rotation and are arranged at equal angular intervals in the circumferential direction, and the pressurized fluid that penetrates the casing and communicates with the recess A supply port and a discharge port, the supply port and the exhaust port are provided at positions opposed to the rotation center of the rotating cylinder, and the pressurized fluid is injected from the supply port to the rotor blades. Can be supplied as

  A plurality of the concave grooves can be arranged at predetermined intervals along the axial direction of the rotating cylinder.

  The pressurized fluid can be injected in a tangential direction of the rotating cylinder through the supply port.

  The slurry transfer device of the present invention can be interposed in a horizontal portion of a mud pipe of a mud shield shield machine.

  According to the slurry transfer device of the present invention, the slurry can be transferred without changing the direction while linearly penetrating in the axial direction, so that the wear of the slurry can be reduced while reducing wear in the piping and the casing. An increase in specific gravity can be suppressed.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.

  1 to 3 show Example 1 of a slurry transfer apparatus according to the present invention. The slurry transfer device 10 shown in these drawings includes a casing 11 and a rotating cylinder 12, and rotates by supplying a pressurized fluid such as compressed air or oil between the casing 11 and the rotating cylinder 12. The basic configuration is to rotationally drive the cylinder 12.

  The casing 11 includes a hollow cylindrical cylinder 11a having both ends opened, and a pair of front and rear ring plates 11b and 11c fixed to the opening end of the cylinder 11a and having a through-hole formed in the center. ing. An inlet 14 for the slurry S is provided at one end side of the casing 11, and a slurry S discharge port 16 is provided at the other end side.

  In the case of the present embodiment, the intake port 14 and the discharge port 16 have a hollow truncated cone shape, and one end is fixed to the front and rear ring plates 11b and 11c of the casing 11, and the other end side is provided. Are each provided with a flange 17 for connection. The rotary cylinder 12 is rotatably accommodated in a cylinder 11a of the casing 11, and has a main body 12a formed in a substantially cylindrical shape and a through hole 12b formed through the central axis.

  Front and rear step portions 12c and 12d are formed on the outer peripheral surface of the front and rear ends of the main body 12a by notching the outer peripheral surface by a predetermined depth, and a pair of front and rear concave grooves are provided adjacent to these step portions 12c and 12d. 12e and 12f are provided.

  The pair of concave grooves 12e and 12f are arranged at a predetermined interval along the axial direction of the main body 12a so as to be parallel to each other. The concave grooves 12e and 12f need not be limited to a pair, and a larger number can be provided.

  Bearings 18 that rotatably support the main body 12a are mounted on the front and rear stage portions 12c and 12d, respectively. Further, an annular oil seal 20 is disposed on the front end side of the front step portion 12c so as to be in sliding contact with both the outer peripheral surface of the step portion 12c and the inner peripheral surface of the cylindrical body 11a of the casing 11.

  Further, an O-ring 21 is interposed between the front end surface of the main body 12 a and the inner surface of the front ring plate 11 b of the casing 11. On the other hand, between the rear end surface of the main body 12a and the inner surface of the rear ring plate 11c of the casing 11, an annular oil seal 22 that is in sliding contact with both is disposed.

  With the above sealing configuration, the space between the outer periphery of the rotating cylinder 12 including the front and rear concave grooves 12e and 12f provided in the vicinity of the step portions 12c and 12d and the inner surface of the casing 11 is sealed with an oil seal (oil seal 20, 22 and O-ring 21).

  Each of the recessed grooves 12e and 12f has a predetermined width and is provided so as to make one round of the outer periphery of the main body 12a. The recessed grooves 12e and 12f have a height that is about ½ of the groove depth. A plurality of rotor blades 12g having protrusions are provided.

  As shown in FIG. 2, the rotary blades 12g extend radially outward from the rotation center O of the rotary cylinder 12, and the rotary blades 12g are arranged at equal angular intervals. Moreover, each rotary blade 12g is arrange | positioned so that the tangent direction and main surface of the main body 12a of the rotary cylinder 12 may orthogonally cross.

  Further, each of the concave grooves 12e and 12f is provided with a supply port 24 and a discharge port 26 for the pressurized fluid that pass through the cylindrical body 11a of the casing 11 and communicate with each other.

  As shown in FIG. 2, the supply port 24 penetrates the cylinder 11 a so as to be directed in the tangential direction of the cylinder 12 a of the rotary cylinder 12, and the compressed air is supplied from the supply port 24 configured in this way. Further, when the pressurized fluid in the oil navigator is ejected, the pressurized fluid can collide with the main surface of the rotor blade 12g so as to be orthogonal. 1 and 2, a member denoted by reference numeral 27 is a connection coupler that is mounted so as to communicate with each supply port 24.

  On the other hand, the discharge port 26 penetrates the cylinder 11a so as to be directed to the rotation center O of the cylinder 12a of the rotary cylinder 12. The supply port 24 and the discharge port 26 are provided at opposing positions displaced by 180 ° with respect to the rotation center O of the rotary cylinder 12, and the pressurized fluid is orthogonal to the rotary blade 12 g from the supply port 24. Is injected as follows.

  A ribbon impeller 12h is provided on the inner peripheral surface of the through hole 12b. The ribbon impeller 12h has a function of transferring the slurry S taken in via the intake port 14 to the discharge port 16 side by rotating the rotary cylinder 12.

  In the slurry transfer device 10 configured as described above, pressurized fluid such as compressed air or oil is supplied to the concave grooves 12 e and 12 f provided between the casing 11 and the rotating cylinder 12 through the supply port 24. Then, the pressurized fluid is jetted onto the rotary blade 12g, and the rotary cylinder 12 can be driven to rotate.

  When the rotary cylinder 12 is rotated, the rotary cylinder 12 is provided with a through-hole 12b that communicates linearly in the axial direction with one end communicating with the intake port 14 and the other end communicating with the discharge port 16. Since the ribbon impeller 12h for transferring the slurry S to the discharge port 16 side is provided on the inner peripheral surface of the through-hole 12b, the slurry S passes through the impeller 12h without changing its direction. Can be transferred to.

  In this case, the slurry S is transferred to the discharge port 16 side by rotating the rotary cylinder 12 by the ribbon impeller 12h. Therefore, unlike the mud pump, the pipe S and the casing are not worn and stirred and mixed. Hardly occurs, and the specific gravity of the slurry S does not increase.

  FIG. 3 shows a specific application example of the slurry transfer apparatus 10 according to the present invention. The application example shown in FIG. 3 is a case where the slurry transfer apparatus 10 shown in the first embodiment is applied to the muddy water shield method. Is shown.

  In the figure, reference numeral 30 denotes a mud shield excavator. In the excavator 30, a sludge pipe 32 for transferring the slurry S, which is a mixture of excavated soil and mud water, to a primary processing machine on the ground side is provided in a chamber 34. It is connected to the.

  Conventionally used drainage pumps 36 are connected to the drainage pipe 32 in the vicinity of the chamber 34 and in the vicinity of the shaft, respectively, and between these drainage pumps 36, the drainage pipe 32. The slurry transfer device 10 of the present invention is disposed in the horizontal portion of the.

  In the application example shown in FIG. 3, two slurry transfer apparatuses 10 are installed at a predetermined interval in the horizontal portion of the sludge pipe 32. In the case of this application example, the compressed air A is used for rotationally driving the rotary cylinder 12.

  The compressor 38 that supplies the compressed air A is installed on the ground side, and is supplied to each slurry transfer device 10 via the air pipe 40. The air pipe 40 is provided with a plurality of on-off valves 42, and the compressed air A is supplied to each supply port 24 via the electric control valve 44 in each slurry transfer device 10.

  When the compressed air A is supplied to the supply port 24 of each slurry transfer device 10, the rotating cylinder 12 is rotated by the injection of the compressed air A, and the slurry S can be transferred to the discharge port 16 side.

  When the slurry transfer device 10 according to the present invention is employed at the site of the muddy water shield construction and driven by the compressed air A, the installation of the underground cubicle becomes unnecessary or the size can be reduced.

  Further, the slurry transfer device 10 may be installed as it is in the extending direction of the sludge pipe 32, so that the installation can be easily performed, the visibility is deteriorated due to bending or the like, and there is a risk of a contact accident with a worker or a carriage. The sex can be reduced.

  The slurry transfer device according to the present invention can be effectively used when applied to a mud pipe of a mud shield method.

It is a section explanatory view of the slurry transfer device concerning the present invention. It is principal part sectional drawing of FIG. It is explanatory drawing at the time of applying the slurry transfer apparatus concerning this invention to a muddy water shield construction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Slurry transfer apparatus 11 Casing 11a Cylindrical body 12 Rotating cylinder 12a Main body 12b Through hole 12c Front stage part 12d Rear stage part 12e Front concave groove 12f Rear concave groove 12g Rotary blade 12h Ribbon type impeller 14 Inlet 16 Outlet

Claims (5)

A cylindrical casing provided with a slurry inlet at one end and a slurry outlet provided at the other end, a cylindrical rotating cylinder accommodated in the casing, and between the casing and the rotating cylinder A slurry transfer device for rotating the rotary cylinder by supplying a pressurized fluid such as compressed air or oil to
In the rotating cylinder, one end communicates with the intake port, the other end communicates with the discharge port, and a through hole that linearly penetrates in the axial direction is provided.
A slurry transfer device, wherein a ribbon impeller is provided on the inner peripheral surface of the through hole to transfer the slurry taken in via the intake port to the discharge port side by rotating the rotary cylinder. The rotation drive part of the rotary cylinder is provided so as to circulate on the outer peripheral surface of the rotary cylinder, and a concave groove that is separated from the outside via a sealing material;
In the concave groove, a plurality of rotating blades that protrude radially outward from the rotation center of the rotating cylinder and are arranged at equal angular intervals with a predetermined interval in the circumferential direction;
A supply port and a discharge port for the pressurized fluid that pass through the casing and communicate with the recess;
The supply port and the exhaust port are provided at positions facing each other with respect to the rotation center of the rotary cylinder, and the pressurized fluid is supplied so as to be jetted from the supply port to the rotary blade. Item 4. The slurry transfer apparatus according to Item 1.   The slurry transfer device according to claim 2, wherein a plurality of the concave grooves are arranged at predetermined intervals along the axial direction of the rotary cylinder.   4. The slurry transfer apparatus according to claim 1, wherein the pressurized fluid is ejected in a tangential direction of the rotating cylinder through the supply port. 5.   The slurry transfer device according to any one of claims 1 to 4, wherein the slurry transfer device is interposed in a horizontal portion of a mud pipe of a muddy water type shield machine.

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