JPH01257781A - Suction pump for slurry - Google Patents

Abstract

PURPOSE:To efficiently suck in slurry in a concentrated condition by varying the volume of a slurry flow passage and sucking in the slurry. CONSTITUTION:A fluid chamber 4 provided between the outer pipe 1 and soft tube 2 of a slurry suction pump can vary the capacity by the pressure feeding/ discharging of a fluid. As a fluid such as air, water, etc. is fed under pressure into the fluid chamber 4, the soft tube 2 is deformed constricting a slurry flow passage 3. Then, as the fluid is discharged out of the fluid chamber 4, the soft pipe 2 is reversibly returned to the original shape to ensure the initial slurry flow passage 3. By repeating this movement, the pump effects a slurry sucking action. Also, since the fluid is forcedly fed under pressure and discharged while preventing backward flow by means of check valves 6, 7, it is also possible to carry out suction in the vertical direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a slurry suction pump for efficiently collecting slurry, particularly sludge deposited on the bottom of a trench or bay.

[Conventional technology]

In general, slurry-like sludge that accumulates on the bottom of ditches, etc. causes unpleasant odors due to gas generation, kills farmed fish, and even pollutes seawater.
Since it has various negative effects on the environment, it should be removed as much as possible.
Appropriate disposal is recommended. In addition, when disposing of sludge, it must be dried to some extent after being collected before being transported by truck or in a special container to store the sludge, but in any case, the water content should be as low as possible. preferable.

By the way, conventionally, in order to collect this sludge, it was sucked together with water by a drainage pump and sent to the subsequent processing stage.

[Problem to be solved by the invention]

The drainage pump is installed on a dredger, so in order to suck up the sludge, it was necessary to connect an extension pipe to the drainage pump and guide the tip of the extension pipe to the desired sludge accumulation location, but the drainage pump is heavy. Generally, a centrifugal pump is used to suction the slurry, and the suction force of the pump is so strong that the tip of the extension pipe moves around, making it difficult to fix it in the desired position. To prevent this, people tried to support the trench by hand, but if the sludge had accumulated deep at the bottom of the trench, it would be necessary to submerge to support it, which is also unfavorable from an environmental standpoint. .

The present invention solves the above-mentioned conventional problems, and aims to provide a slurry suction pump that can efficiently suction slurry and does not require supporting the tip of the extension pipe with appropriate suction speed. do.

[Means to solve the problem]

In order to solve the above problems, the present invention provides an outer tube, a wear-resistant soft tube inserted into the outer tube, a fluid chamber provided between the outer tube and the soft tube, and a fluid chamber provided between the outer tube and the soft tube. The fluid chamber is provided with a fluid outlet hole for pressurizing or discharging fluid into the fluid chamber, and a check valve provided on at least one of the front and rear sides of the slurry flow path of the soft pipe. A method of reversibly deforming the soft tube by ejecting was used.

In addition, as the above-mentioned check valve, a check valve made of a wear-resistant elastic material that converges in the slurry flow direction and has a slit-shaped opening at the tip and opposing ribs for reinforcing the valve body is also used. there was.

[For production]

The volume of the fluid chamber provided between the outer tube and the soft tube of the slurry suction pump changes as fluid is pressurized and discharged. That is,
The outer tube is provided with a fluid outlet hole, and when a fluid such as air or water is forced into the fluid chamber through the fluid outlet hole, the soft tube is deformed and the slurry flow path is converged. Next, when the fluid is discharged from the fluid chamber, the soft tube reversibly returns to its original shape to secure the original slurry flow path. Each time this movement is repeated, the pump performs the action of suctioning the slurry.

Additionally, since fluid is forced in or out, and a check valve prevents backflow, suction is also performed in the vertical direction.

The check valve for reinforcing the valve body has a pair of ribs, which have a function of preventing reversal when a force in the opposite direction is applied to the reverse valve.

〔Example〕

Hereinafter, one embodiment of the slurry suction pump of the present invention will be described in more detail with reference to the drawings. 1 is an outer tube made of a steel pipe or other metal tube or a hard tube, 2 is a rubber tube that is a soft tube made of a wear-resistant material, and 3 is a rubber tube made of a wear-resistant material. A slurry flow path through which slurry flows in the direction of the arrow inside the rubber tube 2, 4 a fluid chamber provided between the outer tube 1 and the rubber tube 2, 5 a fluid outlet for pressurizing or discharging fluid into the fluid chamber 4. The manholes 6 and 7 are check valves to prevent backflow of slurry. The check valves 6 and 7 normally have shapes that converge toward the slurry flow direction, and the check valve main body 8 is made of a flexible and wear-resistant rubber material like the rubber tube 2.

Reference numeral 9 denotes a pair of ribs that are included in the check valve main body 8 and are provided facing each other to prevent the slurry from reversing even if a force is applied in the reverse flow direction.

The rib 9 may be made of any material, such as hard synthetic resin or metal, as long as the check valve body 8 does not easily turn over.

Each of the check valves 6 and 7 has a slit I-shaped opening 1 at its tip.
It has 0.

Next, to explain the operation of the suction pump of this embodiment, first, the extension vibrator 11, which is connected to the primary side of the check valve 6 and has a strainer at the opening, is plunged into the accumulated slurry, and then the When the fluid is forced into and discharged from the fluid chamber 4 through the inlet/outlet hole 5 several times, the rubber tube 2 acts as a pump and sucks the slurry. At the beginning of operation, the inside of the rubber tube 2 and the inside of the extension vibrator 11 are filled with air, but due to the presence of the check valves 6 and 7, the air is discharged toward the secondary side, and subsequently, the slurry flows inside the rubber tube 2. is attracted to.

Next, when the fluid is again pressurized into the fluid chamber 4, the check valve 6 transports the slurry in the forward direction without backflowing. After that, when the fluid in the fluid chamber 4 is forcibly discharged, the rubber tube 2
is restored to its original shape, and along with this, the slurry is sucked from the primary side through the check valve 6. In this case, since the check valve 7 is provided, suction of the slurry from the secondary side in the opposite direction is reliably prevented. In the normal state, the ends of the check valves 6 and 7 converge to form a slot-shaped opening 10 as shown in FIG. 2, but during slurry suction, the ends deform due to the force at the ends and become circular openings. , the slurry flows without resistance.

The shape of the fluid chamber 4 is such that a part of the outer tube 1 protrudes as in this embodiment, is blocked by a plate having a through hole in the middle, and the rubber tube 2
Not only does it have a structure that prevents it from bulging out, but it also has a structure in which the outer tube 1 and the rubber tube 2 are simply pipe-shaped, without any protruding parts or perforated plates.
Sometimes there is only a gap between the two. Further, as shown in the figure, the thickness of the rubber tube 2 on the second flow side of the slurry flow path 3 is reduced to form a thin walled portion 12, so that this portion can be easily converged and smooth pump operation can be achieved.

Furthermore, in this embodiment, two check valves 6 and 7 are provided, but
One or the other may be omitted.

FIG. 5 shows a piston pump used for forcibly introducing and discharging fluid, 13 is a cylinder filled with fluid, 1
4 is a fluid outlet connected to the fluid outlet hole 5; 15 is a tank filled with fluid; 6 is a valve for preventing backflow of fluid from the cylinder 13 to the tank 15; 17 is the inside of the cylinder 13; a piston for pressurizing the fluid of
18a and 18b are limit switches for controlling the sliding width of the piston 17.

For the sake of operational efficiency, fresh water is normally used as the fluid in the piston pump, but if the slurry suction pump is made small-scale, air may be used and the fresh water tank 15 may be omitted. When using fresh water as the fluid, the piston pressure and cylinder diameter should be set so that the pressure applied to the rubber tube 2 is about 5 - 7 -, and the back surface of the piston 17 should be set to increase the sealing efficiency between the cylinder 13 and the piston 17. Fill the 19th tank with fresh water.

The distance between the limit switches 18a and 18b is determined by comparing the volume difference between the normal state and the converged state of the rubber tube 2 and the volume of the cylinder 3.

〔Effect of the invention〕

The present invention has the above-mentioned configuration, and the slurry is sucked by changing the volume of the slurry flow path. Therefore, the slurry in a concentrated state can be efficiently sucked, and the slurry can be sucked properly depending on the state of the slurry. Therefore, the tip of the extension pipe does not dance, and there is no need to manually support the tip of the pipe.

In addition, a fluid chamber is provided between the outer tube and the soft tube, fluid is forcibly introduced or discharged, and a check valve is used to prevent backflow of slurry. Even if the connected extension pipe is supported vertically, suction can be reliably achieved with the set suction force.

Furthermore, since the check valve is provided with ribs, it is possible to prevent the inconvenience of the valve body being reversed even by a force acting in the direction of the backward flow of slurry, making the slurry suction pump extremely effective. were able to provide the following.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the slurry suction pump of the present invention, Fig. 2 is a front view of an embodiment of the check valve as seen from the tip direction, and Fig. 3 is a view of the same check valve from above. Plan view, 4th
The figure is a cross-sectional view of the same check valve, and FIG. 5 is an explanatory diagram of a piston pump used for forcibly injecting and discharging fluid. In addition, in the figure 1...outer pipe, 2...rubber tube, 3...slurry channel, 4...fluid chamber, 5...fluid lead-out hole, 6
・7...Check valve, 9...Rib, 10...Opening. Applicants for the above patents: New 1) Takashi Mibu, patent attorney Kazuo Ohara and one other person JP-A-1-257781 (
4,) , -1cq ('/) size 10■■2 Figure 5

Claims (1)

[Claims] 1. An outer tube 1, a wear-resistant soft tube inserted into the outer tube 1,
A fluid chamber 4 provided between the outer tube and the soft tube, a fluid inlet/outlet hole 5 provided in the outer tube for pressurizing or discharging fluid into the fluid chamber, and a slurry flow path 3 in the soft tube. A slurry suction pump comprising check valves 6 and 7 provided at least on one of the front and rear sides, and forcibly injecting and discharging fluid to reversibly deform the soft tube. 2. The check valves 6 and 7 converge toward the slurry flow direction and have a slit-shaped opening 10 at the tip,
2. The slurry suction pump according to claim 1, wherein the check valve is made of a wear-resistant elastic material and has opposing ribs 9 for reinforcing the valve body.