JP2003214357A - Twin screw type conveying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveying device, in which a spiral blade or a casing can be easily repaired when it has worn. <P>SOLUTION: In a twin screw type conveying device TS, female and male rotors 6, 7 having spiral blades 11, 14 are mutually meshed and are pivotally supported, and the peripheries of the female and male rotors 6, 7 are surrounded by a casing 8. By rotating the female and male rotors 6, 7, a slurry material is taken into a twin screw type conveying device TS from one end side and is fed to the other side. The peripheral portions of the spiral blades 11, 14 are formed to be detachable. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier device for transporting a slurry-like substance such as mud-like soil such as dredged soil.

[0002]

2. Description of the Related Art A twin screw type conveying device 60 shown in FIG. 11 was researched and developed by the present applicant prior to the present invention, and a patent application (Japanese Patent Application No. 2000-3
16940).

The transfer device 60 includes spiral blades 61 and 62.
The male and female rotors 63 and 64 having the above are meshed with each other to be pivotally supported, and the outer circumferences of the female and male rotors 63 and 64 are surrounded by the casing 65. It is designed to be sent to.

The male and female rotors 61 and 62 are designed to form a closed space 66 for accommodating earth and sand in the spiral blades 61 and 62 by being surrounded by a casing 65, and a transport pipe connected to the downstream side. The pressure inside 67 can be easily maintained, it has excellent waterproofness, it has the function of pushing in sand and sand, and it has the features that it can be transported even if lumpy sand is mixed.

[0005]

However, in the above-mentioned transfer device 60, the casing 65 has the spiral blades 61, 62.
Since a large amount of non-uniform soil is transported while sliding the blades, the outer peripheral portions of the spiral blades 61 and 62 and the casing 6
The inner peripheral portion of 5 is easily worn, and if left alone, the spiral blades 61,
There is a problem in that the clearance between the casing 62 and the casing 65 increases, and the efficiency of soil and sand transport is significantly reduced.

When the male and female rotors 61, 62 and the casing 65 are worn, they must be replaced with new ones. However, the male and female rotors 61, 62 and the casing 65 are so large that they cannot be handled without a large lifting work. It was extremely difficult to carry out locally.

In order to reduce such work, it is possible to form the male and female rotors 61 and 62 and the casing 65 with a material having extremely high wear resistance and hardness, but the material cost and the processing cost become too high. It wasn't realistic.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide a carrying device which can easily repair a worn spiral spiral blade or casing.

[0009]

In order to achieve the above object, the present invention rotates male and female rotors having spiral blades by meshing with each other to pivotally support and enclosing the male and female rotors with outer casings in a casing. This is a twin-screw type transfer device that takes in a slurry-like substance from one end side and sends it to the other end side, in which the outer peripheral portion of the spiral blade is detachably formed.

The outer peripheral portion of the spiral blade may be formed so as to be divided in the circumferential direction.

The outer peripheral portion of the spiral blade and the inner peripheral body portion are
It is preferable that they are engaged with each other so as to restrict movement in the axial direction.

Further, male and female rotors having spiral blades are meshed with each other for pivotal support, and the outer circumferences of these male and female rotors are surrounded by a casing. By rotating the male and female rotors, a slurry-like substance is taken in from one end side and the other end side. A twin-screw type transporting device for feeding to, wherein the inner peripheral portion of the casing is divided so as to be detachable.

It is preferable that the inner peripheral portion and the main body portion of the casing are engaged with each other so as to restrict movement in the circumferential direction.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a plan view of a wind / sand transporter 1 equipped with two twin-screw transporters TS according to this embodiment.

This wind / sand transporter 1 is for transporting dredged soil to a landfill, and a transport pipe 3 extending to a predetermined landfill at a sediment discharge port 2 of a twin screw type transport device TS.
It is configured by connecting.

An air supply pipe 4 for supplying high-pressure air into the transportation pipe 3 and a solidifying agent injection pipe 5 for supplying a solidifying agent are connected to the transportation pipe 3, respectively. Then, the earth and sand discharged into the transport pipe 3 are pressure-fed by the discharge pressure of the twin screw type transport device TS, and the high pressure air supplied from the air supply pipe 4 and the solidifying agent supplied from the solidifying agent injection pipe 5 are supplied. It is supposed to be mixed.

The transfer device TS includes a male and female rotor 6, which will be described later.
Sediment is pumped at 7. Further, by supplying high-pressure air into the transport pipe 3, air portions and sediment portions are alternately formed in the pipe 3. The earth and sand parts in the transport pipe 3 each serve as a plug for receiving air pressure, and even if the discharge pressure of the transport device TS is small,
It is transported far.

The solidifying agent is made of concrete or the like that is age-solidified by being mixed with air, and is slowly solidified at the destination.

As shown in FIG. 4, the twin-screw type transport device TS is provided with a pair of male and female rotors 6 and 7 which are pivotally supported by meshing with each other, and a casing 8 which surrounds the outer circumferences of the female and male rotors 6 and 7. .

The male rotor 6 has a thin-walled spiral blade 1 spirally attached to a large-diameter portion 10 provided in the center of a rotary shaft 9.
1, and both ends of the rotating shaft 9 are pivotally supported by the casing 8 via bearings 12.

The female rotor 7 has a thick spiral blade 14 spirally attached to the center of the rotating shaft 13,
Both end sides of are supported by the casing 8 via bearings 15. The thick spiral blades 14 are formed at the same pitch as the thin spiral blades 11 and in the opposite winding direction.

The thick spiral blade 14 has a large diameter portion 1 at its tip.
The thin spiral blade 11 extends to 0 and meshes with the thin spiral blade 11, and the tip of the thin spiral blade 11 extends to the rotating shaft 13 and meshes with the thick spiral blade 14.

Further, as shown in FIGS. 1 and 5, the outer peripheral portions 16 and 17 of the male and female rotors 6 and 7 are detachably attached to the inner peripheral side body portions 18 and 19 of the male and female rotors 6 and 7, respectively.
Moreover, it is formed so as to be divided in the circumferential direction.

Specifically, the outer peripheral portion 1 of the male and female rotors 6 and 7
The outer peripheral blocks 20 and 21 forming the outer peripheral portions 6 and 17 are formed by dividing the outer peripheral portions 16 and 17 of the spiral blades 11 and 14, respectively, and are formed of a wear-resistant steel material in a substantially arc shape. There is.

Then, the outer peripheral portion 1 of the spiral blades 11 and 14
6, 17 and the inner peripheral side main body portions 18, 19 are engaged with each other so as to restrict axial movement. Spiral blade 11,
The inner peripheral side main body portions 18 and 19 of 14 are formed with first convex portions 22 that spirally protrude along the outer peripheral edge, and the outer peripheral portion blocks 20 and 21 respectively have the first convex portion 22. The first groove portion 23 is formed to be fitted to.

As shown in FIG. 6, the outer peripheral block 20,
Reference numeral 21 denotes the inner peripheral side body portions 18, 19 of the spiral blades 11, 14.
It is designed to be screwed with a bolt 24. The bolt 24 penetrates the outer peripheral blocks 20 and 21 from the outer peripheral side and is screwed into the inner peripheral side body portions 18 and 19. An O-ring 53 is provided between the outer peripheral block 20 or 21 and the inner peripheral body part 18 or 19.

As shown in FIG. 4, gears 25 and 26 meshing with each other are integrally provided on one end sides of the respective rotary shafts 9 and 13 of the male and female rotors 6 and 7, respectively. Each of them is rotated in reverse in synchronization with each other.

A motor 27, which is a driving means, is connected to the gears 25 and 26, and the male and female rotors 6 and 7 are rotated by driving the motor 27.

As shown in FIG. 3, the casing 8 has a sediment introduction port 28 at one end and a sediment discharge port 2 at the other end.

A hopper (not shown) for feeding mud-like soil (dredge, etc.) is attached to the earth and sand inlet 28, and a transport pipe 3 is airtightly connected to the earth and sand outlet 2. It is supposed to be done.

As shown in FIGS. 2 and 4, the casing 8
Is formed so as to be vertically separable, and has an inlet header chamber 29 that is formed at one end side and has a sediment introduction port 28 on the upper surface,
An outlet header chamber 30 which is formed on the other end side and has a sediment discharge port 2 on its side surface, and a pressure feed for rotatably accommodating the male and female rotors 6 and 7 arranged between the inlet header chamber 29 and the outlet header chamber 30. A chamber 31 and a gear accommodating chamber 3 for accommodating the gears 25 and 26 for transmitting power to the male and female rotors 6 and 7.
2 and.

The gear accommodating chamber 32 and the inlet header chamber 29 are
It is partitioned by a partition wall 33. As shown in FIGS. 2 and 5, the pumping chamber 31 is formed into a cylindrical shape having a gourd-shaped cross section that surrounds the rotors 6 and 7 with a minute clearance therebetween, and deposits sand in the spiral blades 11 and 14. A pressure feeding space 34 for accommodating is formed.

Then, the transport device TS includes the rotors 6, 7
By mutually rotating the pumps, the pressure-feeding space 34 in which the soil is sealed is moved to the outlet header chamber 30 side.

Further, the inner peripheral portion 35 of the casing 8 which defines the gear accommodating chamber 32 is formed so as to be detachable by being divided in the circumferential direction.

Specifically, the inner peripheral blocks 36 forming the inner peripheral portion 35 of the casing 8 are respectively the casing 8
The inner peripheral portion 35 is formed so as to be separable, and is formed of an abrasion-resistant steel material to be long in the axial direction.

The casing main body portion 37 and the inner peripheral portion block 36 are engaged with each other so as to restrict movement in the circumferential direction. In the casing main body 37, second convex portions 38 extending linearly in the axial direction are provided in the inner peripheral block 3 of each.
A plurality is formed to correspond to No. 6. The inner peripheral block 36 is formed with second groove portions 39 that are fitted to the second convex portions 38, respectively.

As shown in FIG. 9, the inner peripheral block 36 is screwed to the casing main body 37 with bolts 40. The bolt 40 is the inner peripheral block 36.
Is penetrated from the inner peripheral side and screwed into the casing main body portion 37. In addition, the adjacent inner peripheral block 3
A seal 54 is provided between each of the six.

Next, the operation will be described.

When the motor 27 is driven, the driving force of the motor 27 is transmitted to the male and female rotors 6 and 7 via the gears 25 and 26, and the male and female rotors 6 and 7 are reversely rotated at the same peripheral speed while meshing with each other. .

The earth and sand put in from the hopper is dropped into the inlet header chamber 29 through the earth and sand inlet 28 and taken into the spiral blades 11 and 14 of the male and female rotors 6 and 7. Since the male and female rotors 6, 7 are surrounded by the casing 8 on the outer circumference, they are rotated to form the pressure-feeding space 34 while taking in the soil and sand into the spiral blades 11, 14 and seal the soil in the pressure-feeding space 34. .

Further, as the male and female rotors 6 and 7 are further rotated, the pressure-feeding space 34 is moved in the axial direction (side of the earth and sand discharge port 2), and the earth and sand sealed inside is pushed out into the outlet header chamber 30.

At this time, since the male and female rotors 6 and 7 are rotated while rubbing the casing 8 with earth and sand at the outer peripheral portions 16 and 17, respectively, the outer peripheral portions 16 and 1 of the spiral blades 11 and 14 are rotated.
7 and the inner peripheral portion 35 of the casing 8 eventually wear due to long-term use.

When the outer peripheral portions 16 and 17 of the spiral blades 11 and 14 are worn, the outer peripheral portion blocks 20 and 21 are replaced with new ones, and when the inner peripheral portion 35 of the casing 8 is worn,
The inner peripheral block 36 is replaced with a new one. In either case, it is easy because there is no need to measure the amount of wear or adjust the dimensions.

When the outer peripheral blocks 20 and 21 are replaced, the casing 8 is divided into upper and lower parts to expose the male and female rotors 6 and 7, and the male and female rotors 6 and 7 are sequentially rotated and replaced in order from the end. It is easy because it is not necessary to lift the male and female rotors 6 and 7.

The outer peripheral blocks 20 and 21 are positioned by fitting the first convex portion 22 into the first groove 23, and the outer peripheral blocks 20 and 21 are attached and detached by attaching and detaching the bolts 24. The work is extremely easy.

The inner peripheral block 36 is replaced by dividing the casing 8 into upper and lower parts and then removing the male and female rotors 6 and 7, respectively.

The inner peripheral block 36 is positioned by fitting the second convex portion 38 into the second groove 39, and the inner peripheral block 36 is attached and detached by attaching and detaching the bolt 40. It's very easy.

In this way, the outer peripheral blocks 20, 2
After the 1 and the inner peripheral block 36 are replaced, the repair work is completed simply by reassembling in the reverse order of the disassembly.

In this way, the male and female rotors 6 and 7 having the spiral blades 11 and 14 are meshed with each other to be pivotally supported, and the outer circumferences of these male and female rotors 6 and 7 are surrounded by the casing 8 to rotate the male and female rotors 6 and 7. Thus, the twin-screw type transfer device TS that takes in the earth and sand from one end side and sends it to the other end side, and since the outer peripheral portions of the spiral blades 11 and 14 are detachably formed, it is possible to eliminate a large-scale hanging work on site. Therefore, the male and female rotors 6 and 7 can be easily repaired.

Since the outer peripheral blocks 20 and 21 can be manufactured in advance at the factory, the local measurement work is unnecessary and the dimensional accuracy of the spiral blades 11 and 14 can be obtained. And
The inner peripheral side body portions 18 and 19 of the spiral blades 11 and 14 can be formed of general mechanical structural steel, and the manufacturing cost can be reduced.

Further, the shapes of the outer peripheral blocks 20 and 21,
Since the material, surface treatment, configuration, etc. can be freely changed as necessary, the tooth profile and the like can be changed according to the soil quality to be conveyed.

Since the outer peripheral portions 16 and 17 of the spiral blades 11 and 14 are formed so as to be divided in the circumferential direction, the outer peripheral portion block 2
Since 0 and 21 can be formed in a size that is easy to handle, and each piece can have the same shape, manufacturing is relatively easy.

Since the outer peripheral blocks 20 and 21 and the inner peripheral side main bodies 18 and 19 are engaged with each other so as to regulate axial movement, sufficient strength can be easily obtained and good soil can be obtained. It can be pushed in in the axial direction.

Since the inner peripheral portion 35 of the casing 8 is formed so as to be divided in the circumferential direction so as to be detachable, it is possible to eliminate a large-scale disassembling work on site and to easily restore the casing 8.

Since the inner peripheral block 36 can be manufactured in advance in a factory, the measurement work on site is unnecessary, and the casing 8
The dimensional accuracy of can be obtained. Further, the casing body 37 can be formed of general steel for machine structural use, and the manufacturing cost can be reduced.

The shape and material of the inner peripheral block 36,
Since the surface treatment, the structure, etc. can be freely changed as necessary, it is possible to set the clearance according to the soil quality to be conveyed. Since each piece of the inner peripheral block 36 can have the same shape, it is relatively easy to manufacture.

When the outer peripheral blocks 20 and 21 and the inner peripheral block 36 are replaced at the same time, it is possible to adjust the earth and sand carrying capacity by adjusting the size ratio of each other in the radial direction.

The mounting structure of the outer peripheral blocks 20 and 21 is not limited to the above. For example, as shown in FIG. 7, the reamer bolt 44 is axially penetrated through the outer peripheral block 41 and the convex portion 43 formed on the inner peripheral side main body portion 42, and the nut 45 is screwed onto the tip end side of the reamer bolt 44 to form the reamer bolt. You may make it fix | tighten and fix with 44 and the nut 45.

Further, as shown in FIG. 8, the inner peripheral side body portion 4
6, a spiral groove 47 extending along the outer circumference is formed, and a convex portion 48 fitted in the spiral groove 47 is formed on the outer peripheral block 49.
It may be formed in. And the inner peripheral side body portion 4
6. Reamer bolt 44 is passed through 6 and the convex portion 48 in the axial direction,
The reamer bolt 44 and the nut 45 may be tightened and fixed.

Similarly, the mounting structure of the inner peripheral block 36 is not limited to that described above. For example, as shown in FIG. 10, the inner peripheral blocks 50 adjacent to each other in the circumferential direction are connected by bolts 51 and nuts 52, respectively. It may be fixed.

Although the outer peripheral blocks 20 and 21 and the inner peripheral block 36 are made of wear-resistant steel material, any wear-resistant material such as rubber or sealing material may be used. .

The outer peripheral blocks 20 and 21 are exchanged over the entire circumference, but if they are exchanged by at least one pitch, the earth and sand can be pushed against the pressure in the transport pipe 3 and the earth and sand carrying capacity is improved. You can recover.

[0064]

In summary, the present invention has the following excellent effects. (1) The worn male and female rotors can be easily repaired. (2) A worn casing can be easily repaired.

[Brief description of drawings]

FIG. 1 is an exploded side view of a male rotor showing a preferred embodiment of the present invention.

FIG. 2 is an exploded perspective view of a casing.

FIG. 3 is a plan view of a wind / sand transporter.

FIG. 4 is a plan sectional view of a twin screw type transport device.

5 is a cross-sectional view taken along the line VV of FIG.

FIG. 6 is an enlarged view of a main part of FIG.

FIG. 7 is an enlarged cross-sectional view of a main part of a male rotor showing another embodiment.

FIG. 8 is an enlarged cross-sectional view of a main portion of a male rotor showing another embodiment.

9 is an enlarged cross-sectional view of a main part of FIG.

FIG. 10 is an enlarged sectional view of a main part of a casing showing another embodiment.

FIG. 11 is a side sectional view of a conventional twin screw type conveying device.

[Explanation of symbols]

6 male rotor 7 female rotor 8 casing 11 Thin-walled spiral blade (spiral blade) 14 Thick spiral blade (spiral blade) 16 Perimeter 17 Perimeter 18 Inner peripheral body 19 Inner peripheral body 35 inner circumference 37 Casing body (body) TS twin screw type conveyor

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3H041 AA03 BB05 CC04 DD01 DD05                       DD21 DD31 DD33 DD37 DD38                 3H044 AA03 BB04 CC04 DD01 DD05                       DD09 DD21 DD23 DD27 DD28

Claims (5)

[Claims] 1. A male and female rotor having spiral blades is meshed with each other to pivotally support the male and female rotors, and outer circumferences of these male and female rotors are surrounded by a casing. A twin-screw type conveying device for feeding to a twin-screw type conveying device, wherein an outer peripheral portion of the spiral blade is detachably formed. 2. The twin screw type transfer device according to claim 1, wherein an outer peripheral portion of the spiral blade is formed so as to be dividable in a circumferential direction. 3. The twin screw type transfer device according to claim 1 or 2, wherein the outer peripheral portion and the inner peripheral side main body portion of the spiral blade are engaged with each other so as to restrict movement in the axial direction. 4. A male and female rotor having spiral blades are meshed with each other for pivotal support, and the outer circumferences of these male and female rotors are surrounded by a casing. By rotating the male and female rotors, a slurry-like substance is taken in from one end side and the other end side. A twin-screw type conveying device for feeding to a twin-screw type conveying device, characterized in that an inner peripheral portion of the casing is divided so as to be detachable. 5. The inner peripheral portion and the main body portion of the casing are engaged with each other so as to restrict movement in the circumferential direction.
Twin screw type conveying device described.