JPH0772015B2 - Slurry discharging device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slurry discharging device for discharging slurry by air.

[0002]

2. Description of the Related Art Conventionally, for example, when a slurry-like earth and sand generated by excavation in underground construction is discharged to the ground, this is done by a screw conveyor.

[0003]

When the slurry is discharged as described above, backflow may occur unless the water content of the discharged slurry is low or the discharge flow rate of the slurry is not constant. Further, if foreign matters such as empty cans are mixed in the slurry, the foreign matters are caught in the screw conveyor and the like, which hinders the subsequent operation.

The present invention has been made paying attention to such a point, and an object thereof is to take the slurry into the closed space and then supply the air to the closed space without leaking the slurry. In order to prevent backflow of the slurry, the foreign matter in the slurry is bitten out, and the slurry is smoothly discharged.

[0005]

In order to achieve the above-mentioned object, the solution means provided by the present invention is a casing having a rotor chamber having a circular cross section, and is inserted into the rotor chamber of the casing and rotated by a driving means. And a rotor. The rotor is integrally provided with a blade that extends in the radial direction from the center of rotation and forms a moving chamber that rotates with the rotor in the rotor chamber. Further, the casing is provided with a carry-in port that communicates with the moving chamber at the slurry carry-in position, a carry-out port and an air supply port that communicate with the moving chamber at the slurry carry-out position, and the rubber is provided in the inter-blade spaces almost every other rubber. Etc. are filled.

[0006]

With the above structure, in the present invention, the slurry is
It is carried in from the carry-in port to the moving chamber at the slurry carry-in position,
When the moving chamber is rotated to the slurry carry-out position by the rotation of the rotor, the air supplied from the air supply port is discharged to the outside from the carry-out port. In that case, since the slurry is taken into the moving chamber and then discharged by air, it does not flow back.
Moreover, since almost every other space between the blades is filled with rubber or the like, the spitting property of the slurry discharged from the carry-out port becomes remarkable, and the momentum of the slurry conveyed as a plug flow increases. Backflow is prevented. Further, since the airtightness between the casing and the rotor is ensured by the rubber or the like, leakage of air or the like from the moving chamber is prevented. Further, when the slurry is carried into the transfer chamber from the carry-in port, foreign matter in the slurry is bitten between the casing and the blade, so that there is no problem due to foreign matter biting such as a screw conveyor.

[0007]

Embodiments Embodiments will be described below with reference to the drawings. 1 and 2, 10 is a rotor housing 10
a and side housings 10 mounted on both sides
A rotor chamber 11 having a circular cross section is formed inside the rotor housing 10a. A rotor 20 made of high chromium cast iron is rotatably fitted in the rotor chamber 11. Rotor 2
Reference numeral 0 includes a rotation center portion 21 and six blades 22 integrally provided on the rotation center portion 21. The blade 22 extends in the radial direction from the rotation center portion 21 and forms six moving chambers 23 that rotate together with the rotor 20 in the rotor chamber. The rotation center portion 21 is provided in the side housing 10
It is supported by water bearings 16 provided at b and 10c. In the side housing 10c, the blade 22
A side plate 17 is attached to the portion where the end faces of the slide contact. The side plate 17 is mounted on the side housing 10c via a screw type position adjusting mechanism (not shown).
The position adjusting mechanism allows the clearance between the side plate 17 and the rotor 20 to be optimally adjusted. The water leaking from the water bearing 16 has a function of washing away the earth and sand between the side plate 17 and the rotor 20. The hydraulic motor 31 and the speed reducer 3 directly connected to the hydraulic motor 31 are provided in the side housing 10b.
2 is attached, and these constitute the driving means 30. On the other hand, one end of the rotation center portion 21 penetrates the side housing 10b and is connected to the output shaft of the speed reducer 32. Therefore, when the hydraulic motor 31 rotates, the six moving chambers 23 rotate, and in the middle of each of the moving chambers 23, the moving chambers 23 move into the slurry carry-in position (the 12 o'clock position in FIG. 2) and the slurry carry-out position (the 6 o'clock position in FIG. 2). Position) and will be located in. The hydraulic motor 31 is controlled to temporarily rotate in reverse when the rotation resistance exceeds a predetermined value. At the upper part of the rotor housing 10a, a carry-in port 12 communicating with the moving chamber 23 at the slurry carry-in position is opened.
A guide 13 stands up from the peripheral edge of the. In addition, an outlet 14 that communicates with the moving chamber 23 located at the slurry unloading position is opened in the one side housing 10c.
The air supply port 15 is opened in the other side housing 10b. Compressed air is supplied to the air supply port 15 from a compressor (not shown).
A discharge pipe 40 is connected to the carry-out port 14. The discharge pipe 40 is provided with two air ejectors 51 and 52. In the air ejectors 51 and 52, the central axis of the hole is a predetermined angle (for example, 15 mm) with respect to the central axis of the discharge pipe 40.
It is provided so as to incline inward and intersect on the downstream central axis. Compressed air is supplied from the compressor to the air ejectors 51 and 52, and air is ejected downstream from the ejection ports 51a and 52a. Then, every other space between the blades is filled with rubber R or the like and is fixed to the rotor 20 by baking or the like. Therefore, the rubber or the like R is fixed to half of the six moving chambers 23,
The other half is left as space.

Therefore, in the above embodiment, when the slurry is introduced into the guide 13, the slurry enters the moving chamber 23 located at the slurry carry-in position from the carry-in port 12 and the moving chamber 23 rotates to the slurry carry-out position by the rotation of the rotor 11. The slurry is discharged from the discharge port 14 to the discharge pipe 40 by the air supplied from the air supply port 15. Then, due to the pressure of the air ejected from the air ejectors 51, 52, the air is ejected further downstream. In that case, since the slurry is taken into the moving chamber 23 and then discharged by air,
Do not backflow. In addition, since the spaces between the blades are filled with rubber R or the like almost every other space, the conspicuousness of the slurry discharged from the carry-out port 14 becomes remarkable, and the momentum of the slurry conveyed as a plug flow is increased. And backflow is prevented. Further, the casing 10 and the rotor 20 are made of rubber R or the like.
Since the airtightness between the two is secured, the leakage of air and the like from the moving chamber 23 is prevented, the operating loss is reduced, and the slurry can be strongly discharged correspondingly. Further, when the slurry is carried into the moving chamber 23 from the carry-in port 12, foreign matter in the slurry is bitten between the rotor housing 10a and the blade 22, so that there is no problem caused by foreign matter biting such as a screw conveyor. It won't happen. In that case, the hydraulic motor 3 is used to drive the rotor 20.
Since No. 1 is adopted, even if the rotor 20 is stopped due to foreign matter being caught, an excessive load is not applied to each part of the drive means 30. Moreover, when the rotation resistance exceeds a predetermined value, the hydraulic motor 31 temporarily rotates in the reverse direction, so that the foreign matter that has been caught while the forward rotation and the reverse rotation are repeated is carried into the moving chamber 23 and smoothly discharged. It

FIG. 3 shows a modification. Although the six blades 22 are provided in the above-described embodiment, in the modified example, four blades are provided in the rotor 20 ′.
A blade 22 'is provided. R'is rubber or the like. In this case, the operation and effect of the device are the same as those in the above embodiment. FIG. 4 shows another modification. Compared to the previous modification, the tip shapes of the guide 130 and the blade 220 are formed to be sharp, and the foreign matter in the slurry is effectively cut off. Reference numeral 60 denotes a hopper attached to the upper side of the casing 10 for guiding the slurry.
It leads to. R ″ is rubber or the like.

[0010]

As described above, the slurry discharging device of the present invention comprises a casing having a rotor chamber having a circular cross section, and a rotor fitted into the rotor chamber of the casing and rotated by the driving means. A blade that extends in the radial direction from the center of rotation and forms a moving chamber that rotates with the rotor in the rotor chamber, and the casing has a carry-in port that communicates with the moving chamber at the slurry carry-in position and a slurry carry-out position. In addition to providing a carry-out port and an air supply port communicating with the moving chamber in the chamber, the space between the blades is filled with rubber and so on every other space. Due to the remarkable intermittentness of the transfer, the slurry can be discharged without backflow, and the transfer between the casing and the rotor is ensured by rubber etc. It is possible to prevent air leaks from the chamber, reduce the operating loss, and powerfully discharge the slurry.Also, foreign matter in the slurry is bitten between the casing and the blade to prevent problems caused by foreign matter being caught. Can be prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a slurry discharging device according to an embodiment,

FIG. 2 is a vertical sectional side view of a slurry discharging device according to an embodiment,

FIG. 3 is a vertical cross-sectional side view of a modified slurry discharge device.

FIG. 4 is a vertical sectional side view of a slurry discharging device according to another modification.

[Explanation of symbols]

 Reference Signs List 10 casing 11 rotor chamber 12 carry-in chamber 14 carry-out chamber 15 air supply port 20 rotor 21 center of rotation 22 blade 23 moving chamber 30 drive means R rubber etc. 20 'rotor 22' blade R'rubber etc. 220 blade R '' rubber etc.

Claims (1)

[Claims] 1. A rotor comprising a casing having a rotor chamber having a circular cross section, and a rotor fitted into the rotor chamber of the casing and rotated by a driving means, wherein the rotor extends radially from a center of rotation into the rotor chamber. A blade that integrally forms a moving chamber that rotates together with the casing is provided in the casing with a carry-in port that communicates with the moving chamber at the slurry carry-in position, and a carry-out port and an air supply port that communicate with the moving chamber at the slurry carry-out position. Ho provided Rutotomoni, the inter-blade space
A slurry discharging device characterized in that every other unit is filled with rubber or the like .