JP3044816U - Mud pumping equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To make the equipment and equipment for transferring dredged mud by pumping pipes more compact and easy to transport, and at the same time, to be low-cost and durable, which is hard to break down and easy to maintain. I do. [Constitution] A pressure feed pipe is connected to a substantially cylindrical mud inlet casing having a screw conveyor having a rotary shaft whose pipe is a gas-injected pipe, and gas is injected around or around the rotary shaft. A through hole serving as an outlet is formed.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 This invention is used in the field of transporting mud generated by dredging, etc. through a pressure pipe.

[0002]

[Prior art]

 In dredging work to remove sediment and sludge deposited on the water bottom of rivers, lakes, marshes, sea areas, etc., it has been widely practiced to collect the removed dredged soil in a large mud transport purge and transfer it.

In recent years, in order to further improve mobility and the like, for example, as described in Japanese Patent Publication No. Hei 4-21017 and Japanese Patent Publication No. Hei 3-74289, dredged soil is previously screened with a grid screen to remove contaminants. In addition to the removal, the fluidized mud crushed by the mud crusher is alternately sent into the two pumping tanks, and the mud in the pumping tank is alternately and alternately compressed by a valve mechanism interlocking with the compressed air. A device for pumping the pressure into the pumping pipe ahead by pressure has been proposed and implemented.

[0004] Alternatively, as disclosed in Japanese Patent Publication No. 4-25368, a device for feeding mud supplied by a screw conveyor by air pressure of a compressed air nozzle and peristaltic power of a rubber peristaltic tube pressed by a moving roller, As in 4-73495, a device in which a mud collecting screw is provided in front of a pressure vessel is also considered.

[0005]

[Problems to be solved by the invention]

 Such conventional equipment generally increases the cost of the equipment due to its complexity or size, makes it difficult to transport components, requires a large trailer or tow truck, and is extremely difficult to maintain. However, it has a problem that it is liable to break down when worn, for example, and the inner wall of the pumping pipe is easily damaged. An object of the present invention is to solve such a problem.

[0006]

[Means for Solving the Problems]

 The pumping pipe (5) is directly connected to the inlet (2) of the fluid mud (1), which has been collected by dredging and the like and the contaminants have been removed, and the casing (4) having the screw conveyor (3), The introduced mud (1) is fed into the pressure feed pipe (5) by the rotational force of a screw conveyor (hereinafter referred to as a screw) (3), and the rotary shaft (3A) of the screw (3) is formed into a tube to surround it. Alternatively, a through-hole (14) is formed in the mud (1) in such a manner that the gas (6) such as air is dispersed and mixed into the mud (1) as a myriad and large number of bubbles from the tip.

At this time, since the casing (4) is formed so as to surround the screw (3), it is inevitably formed in a substantially cylindrical shape, and its thickness is also substantially equal to that of the pressure feed pipe (5).

In addition, the inlet (2) of the casing (4) is basically provided at the upper part of the casing (4) as a receiving port that continues below the hopper (8) with the screen (7). .

The mud (1) stored in the hopper (8) is desirably expanded by using a well-known sales expansion device (9) or the like in order to further increase the fluidity.

In order to inject the gas (6) into the rotary shaft (3A) of the screw (3), which is a tubular body, for example, as shown in the drawing, the rear of the screw (3) (the traveling direction of the mud (1) is In this case, the tube of the rotating shaft (3A) is released, and a motor (11) for providing a driving force through a gear (10) attached to the tube and the motor (11) are connected to a high-pressure chamber (about 5 to 10 atmospheres). 12), and the gas (6) (air) may be injected and supplied from the air tank (13) also serving as a compressor.

[0011] The tip (front end) of the rotary shaft (3A) of the screw (3) is formed in such a manner that the gas (6) exiting the screw (3) is dispersed and mixed in the mud (1) as much as possible, for example. As shown in the drawing, one of the methods is to partially cover the distal end of the pipe and form a large number of through holes (14) in the peripheral wall. Alternatively, the tip of the tube may have a conical shape with many holes.

[0012] The gas (6) such as air dispersed and introduced is converted into innumerable bubbles and mixed into the mud (1) in the pumping pipe (5), and the mixing ratio is about 50% by volume of the whole. Is the standard. However, the mixing ratio should be higher depending on the application, such as increasing the mixing ratio when sending to a distant place and decreasing the mixing ratio when near, but this depends on the air pressure of the air tank (13) and the rotational speed of the screw (3). It can be easily adjusted by changing the values.

A plurality of auxiliary gas introduction pipes (15) are provided in the vicinity of a connection portion of a pressure feed pipe (5) connected to the front of the casing (4), and a gas (6) such as pressurized air is supplementarily supplied with mud. (1) It may be sent inside.

It is optional to provide a check valve (16) near the connection between the hopper (8) and the casing (4), if necessary.

[0015]

[Action]

 When transporting the mud (1) according to the present invention having the above-described configuration, first, the fluid mud (1) introduced into the casing (4) is given a transfer force by a rotating screw (3). And proceed so as to be pushed out toward the pumping pipe (5).

However, according to the conventional technology, the mud (1) cannot be fed to a distant place because the resistance of the long pumping pipe (5) is large with this technique alone. Or, the only way was to move by the peristaltic force of a rubber-like peristaltic tube. However, in the present invention, even if these forces were not used, the screw conveyor (3) only used the following reasons for the following reasons. The mud (1) in the pumping pipe (5) can be sent very smoothly to a distant place.

That is, when the gas (6) is ejected in a dispersed manner from the rotating shaft (3A) of the screw (3), which is a gas, and becomes innumerable and a large amount of air bubbles, the gas (6) flows into the mud (1). While the specific gravity of the whole object is greatly reduced, each air bubble exerts a bearing effect and at the same time acts as a cushioning material for the inner wall of the pumping pipe (5), and a resistance value per length (distance) of the pumping pipe (5). Therefore, the mud (1) can be extruded to a considerable distance even with a relatively small pumping force of only the screw conveyor (3), and at the same time, the pumping pipe (5) is prevented from being damaged and the durability is improved. It will also increase it.

In addition, mud (1) generally has many viscous materials, and if it is used alone, it sticks to the inner wall of the pipe and is easily clogged. However, countless bubbles can greatly help prevent this. There was found. By the way, since the air from the conventional pumping tank and air nozzle is used as the driving force for pumping the mud, the generated bubbles are also large lump, and the above-mentioned effects and effects cannot be expected at all. Things.

[0019]

【Example】

According to conventional apparatus, about 2m ³ hoppers (8) in a grid pattern screen (7) and expanding sales device (9) sets a built-in screw conveyor (3) to the inner this substantially circularly cylindrical Provided on the casing (4), the rotary shaft (3A) of the screw has a tubular shape with an inner diameter of about 10 mm, and its rear end protrudes from the bearing (17) at the rear end of the casing and is released. A driving motor (11) is connected via a reduction gear (10) or a belt provided on the protruding portion, and a closed high-pressure chamber (12) surrounding these is connected to the rear end of the casing (4). Provide. Also, compressed air is fed from an air tank (13) equipped with a compressor (not shown) to keep the pressure in the high-pressure chamber (12), that is, the rotating shaft (3A) at about 5 atm. Also be able to adjust the strength.

The tip of the rotating shaft (3A) is closed and a small through-hole (14) is provided therein, and about 10 through-holes (14) are also provided in a peripheral wall in the vicinity thereof, and the casing is provided in the vicinity thereof. A pumping pipe (5) which is the same as or slightly thicker than (4) is connected to the casing (4). Also, two auxiliary gas introduction pipes (15) are connected from the vicinity thereof so that they are connected to the air tank (13).

In the above-described state, the mud (1) and the gas (6) (bubbles) are set so as to become a fluid having approximately the same volume and moving at a speed of 1 to 3 m / sec. The present invention is, of course, not limited to such an example.

[0022]

[Effect of the invention]

 As described above, according to the present invention, a large pumping tank and a complicated peristaltic device can be omitted, so that the cost is low, and at the same time, the transportation is easy and a large trailer or a tower is not required. It is hard to break down, easy to maintain, and has a great effect, as the pumping tube is not easily clogged and long-lasting, and at the same time it is light and easy to float.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a representative model of the present invention.

[Explanation of symbols]

1 mud 2 introduction holes 3 screw conveyor 3A rotating shaft 4 casing 5 pressure pipe
6 gas 7 screen 8 hopper 9 stirrer 10 gear 11 motor 12 high pressure chamber 13 air tank 14 through hole 15 auxiliary gas introduction pipe 16 reverse flow Check valve 1
7 ‥‥ bearing

Claims (1)

[Utility model registration claims] 1. A pressure feeding pipe is connected to a substantially cylindrical casing having a muddy introduction port containing a screw conveyor having a pipe into which a gas is injected as a rotation axis. A mud pressure pumping device, wherein a through hole serving as a dispersion jet port is formed.