JPH01240777A - Slurry conveying pipe and slurry conveyer - Google Patents

Abstract

PURPOSE:To convey slurry in an enriched condition and to decrease wear by connecting in series two or more slurry conveying pipes constituted of a fluid press feed hole, forcing fluid to be press fed between an outer pipe and a rubber pipe, and of a fluid discharge hole discharging the fluid. CONSTITUTION:An outer pipe 1, having a fixed length, and a rubber pipe 2, which is in length almost equal internally inserted to this outer pipe 1 while with the inside serving as the slurry flow path, are provided. Slurry conveying pipes 10 to 12 are constituted of a fluid press feed hole 5, forcing fluid to be fed between the outer pipe 1 and the rubber pipe 2, and a fluid discharge hole 6 discharging the fluid. A conveyer is constituted connecting these pipes 10 to 12 in series. Thus enabling slurry in an enriched condition to be conveyed, wearing can be extremely decreased in high conveying efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a conveying pipe and a conveying device for efficiently conveying slurry, particularly sludge accumulated at the bottom of a trench or a 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, it is preferable that the water content be as low as possible. .

By the way, the conventional configurations for collecting this sludge and transporting it to a transport truck include adding a coagulant to the sludge and transporting it inside the vibrator using a spiral pump, or transporting it inside the nozzle using a concrete pump. I often picked it up.

[Problem to be solved by the invention]

Among the conventional configurations mentioned above, when a centrifugal pump is used, a large amount of water is required for its performance, so the mixing rate of sludge is limited to 20% at most, and subsequent drying and transportation are very time-consuming. This was the case.

In addition, when using a concrete pump, the structure is a piston type, so the amount transported per time is small even though the equipment is large, and the cost is relatively high. The problem was that maintenance costs were high because parts wore out quickly.

The present invention solves the problems of the conventional examples described above, and aims to provide a slurry conveying pipe and a slurry conveying device at a low cost, which can convey slurry in a concentrated state with a high content and have extremely low wear.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention includes an outer tube having a certain length, a rubber tube inserted into the outer tube with approximately the same length, tightly joined to the outer tube at both ends, and having a slurry flow path on the inside. A slurry conveying pipe was used, which was provided in a part of the outer pipe and consisted of a fluid pressure bid for pressurizing fluid between the outer pipe and the rubber pipe, and a fluid discharge hole for discharging the fluid.

In addition, a plurality of the slurry conveying pipes are connected in series, and the first
A hopper for introducing slurry is connected to the slurry transport pipe No. 1, a pump is connected to the fluid pressure injection hole of the plurality of slurry transport pipes via a throttle valve, and a quick discharge valve is installed to the fluid discharge hole. A method was also used in which the slurry was conveyed by a slurry conveying device that sequentially conveyed the slurry by controlling the pump and the rapid discharge valve in a cycle and elastically deforming the rubber tube.

[For production]

Since the outer tube of the slurry conveying tube and the rubber tube are tightly joined at both ends, a fluid chamber is formed between them. The outer tube has a fluid pressure hole and a fluid discharge hole. If the fluid discharge hole is closed and fluid such as air or water is forced into the fluid chamber through the fluid pressure hole, the rubber tube will deform and the slurry will flow. Converge the roads. Next, when the fluid injection is stopped and the discharge hole is opened, the rubber tube returns to its original shape due to its elasticity, securing the original slurry flow path. By repeating this movement, the slurry conveying pipe acts as a pump.

In addition, the slurry conveyance device supplies slurry from a hopper to the first slurry conveyance tube out of a plurality of slurry conveyance tubes arranged in series, and pumps fluid into the fluid chamber in a predetermined cycle. If the press-in and discharge are controlled, the whole unit repeats a spiral motion, and the slurry is sequentially conveyed through the rubber tube.

〔Example〕

Hereinafter, one embodiment of the slurry conveying pipe of the present invention will be described in more detail with reference to FIGS. 1 and 2. ■ is an outer pipe made of a steel pipe or other metal pipe/hard pipe, and 2 is a rubber pipe made of a wear-resistant material. 3 is a seal ring for sealing both ends of the rubber tube 2 and tightly joining it to the outer tube 1; 4 is a fluid chamber formed between the outer tube 1 and the rubber tube 2; 5 is a fluid chamber 4; 6 is a fluid discharge hole for discharging the pressurized fluid, and 7 is a flange for connecting the slurry conveying pipe of the present invention. Furthermore, in this embodiment, the rubber tube 2 is not made to have a uniform thickness, but is made thinner on the side of the fluid chamber 4 to provide a thin wall portion 8, so that the rubber tube 2 is deformed by a smaller pressure. Note that 9 is a slurry flow path that conveys the slurry in the direction of the arrow.

In the above configuration, if the fluid is pressurized through the fluid press-in hole 5, the internal pressure of the fluid chamber 4 will rise, but if the fluid is press-fitted any further, the thin walled portion 8 of the rubber tube 2 will succumb to the internal pressure and the slurry flow path 9 will rise. deforms in the direction of crushing it. Next, when the press-fitting of the fluid is stopped and the fluid is discharged from the fluid discharge hole 6, the rubber tube returns to its original shape due to its elasticity. By repeating this operation, the pump will work properly and the slurry can be sent out in the direction of the arrow without any delay.

It should be noted that instead of providing the thin wall portion 8 on the entire fluid chamber 4 side as in this embodiment, it is better to provide the thin wall portion 8 on the fluid pressure inlet hole 5 side, that is, on the slurry inlet side, about half of the area on the slurry inflow side. Since the slurry is pressed from the inflow side, it is possible to reliably prevent the slurry from flowing back due to pressurization.

Next, FIG. 3 shows a slurry conveying device using a plurality of the slurry conveying tubes, 10 to 12 are first, second, and third slurry conveying tubes, respectively, and 13 is the first slurry conveying tube 10. A hopper 14 is provided as necessary for supplying slurry to the slurry, and spiral feeders 15a to 15c are each fed from a pump to the fluid chamber 4 of the slurry transport pipe. Throttle valves for controlling and pressurizing fluid; 168 to 16c are rapid discharge valves for discharging fluid; 17a to 17c are solenoid valves for opening and closing the respective throttle valves and rapid discharge valves;
Reference numeral 18 denotes an inverter for controlling the operation timing or cycle of the three slurry conveyance pipes 10 to 12.

Note that 19 is an extension tube for conveying the slurry to a desired position.

Next, the operation of this apparatus will be explained. First, when slurry is put into the hopper 13, the slurry is supplied to the first slurry conveying pipe 10 by its own weight. In this case feeder 1
4 can also be used to ensure smooth supply. When sufficient slurry is supplied to the first slurry conveyance pipe, the device is operated and the fluid is supplied to the fluid chamber 4 through the throttle valve 15a.
The rubber tube 2 converges to transfer the internal slurry to the second
The slurry is transferred to the slurry transport pipe 11. Next, if the rubber tube of the second slurry conveyance tube is converged while the first slurry conveyance tube remains as it is, the slurry will move to the third slurry conveyance tube 12 without flowing backward. .

If the slurry is transferred from the second slurry transfer tube to the third slurry transfer tube in this order, the slurry can be transferred to the desired position through the extension tube 19 by a series of spiral movements. In this case, the first slurry conveyance pipe 10 discharges fluid by the quick discharge valve while the rubber tube of the second slurry conveyance pipe 11 is converging, and waits for the next conveyance operation. Therefore, although the speed of fluid injection does not need to be very high, the speed of evacuation should be as fast as possible, which is why a quick evacuation valve is used.

FIG. 4 shows the timing of the convergence operation of each rubber tube 2 in the three slurry conveyance tubes. In this embodiment, three slurry conveyance tubes are used, but more or two slurry conveyance tubes may be connected in series. However, to completely prevent backflow, it is preferable to use three or more series.

The pressurizing force of the fluid press-in reservoir differs slightly depending on the fluid, but if the inner diameter of the outer tube is 200 mm and the rubber tube is 150 w1, it will be approximately 5-1 if the fluid is water, and 7-1 if it is air, and the extension will be several hundred meters. Can be transported within the pipe. However, the appropriate pressure varies to some extent depending on the material and elasticity of the rubber tube. Moreover, water is easier to control as the fluid does not change its capacity due to pressure, but when the pipe diameter is small, air is more convenient because the structure of the quick discharge valve 16 and the like is simpler.

Note that when the fluid is air, the quick discharge valve 16 may be equipped with a muffler to prevent noise.

Further, regarding the inverter 18, other control means, such as computer control, can be used as long as the press-in and discharge of fluid can be controlled in a predetermined cycle.

Furthermore, if it is necessary to transport a large amount of slurry, it is possible to not only increase the diameter of the slurry transport pipe, but also install three slurry transport pipes in parallel and increase the diameter of the extension pipe. Sometimes taken.

〔Effect of the invention〕

Since the present invention has the above-described configuration, the following effects can be achieved.

In other words, the pump function can be performed simply by pressurizing and discharging fluid into the fluid chamber formed between the outer tube and the rubber tube, so the configuration is extremely simple, and unlike a centrifugal pump, it is not possible to handle a large amount of water. Since the slurry in a concentrated state can be transported without the need for L), the speed efficiency is high and the subsequent disposal process is also easy.

Furthermore, the only friction part is inside the rubber tube due to the flow of slurry, but the rubber tube is wear-resistant and the slurry conveyance speed is not very fast, so there is extremely little wear and there is almost no need to replace parts due to wear. do not.

On the other hand, the slurry conveyance device uses a plurality of slurry conveyance pipes connected in series to repeat a spiral motion by controlling pumps, throttle valves, rapid discharge valves, etc. to convey slurry in sequence, so it is efficient and It is possible to achieve various effects that could not be achieved with conventional examples, such as being able to reliably transport slurry.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a slurry conveying pipe of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a schematic diagram showing a slurry conveying device.
FIG. 4 is a graph showing the timing of fluid injection into and discharge from each slurry transport pipe. In addition, in the figure 1...outer pipe, 2...rubber tube, 5...fluid pressure large hole, 6...fluid discharge hole, 10-12...slurry conveyance pipe, 13...hopper , 15a-15c... Throttle valve, 16a-16c... Rapid discharge valve. that's all

Claims (1)

[Claims] 1. An outer tube 1 having a certain length, and a rubber tube 2 which is inserted into the outer tube with approximately the same length, has both ends tightly joined to the outer tube, and has a slurry flow path inside. , a slurry conveying tube provided in a part of the outer tube, and comprising a fluid press-in hole 5 for press-fitting fluid between the outer tube and the rubber tube, and a fluid discharge hole 6 for discharging the same. 2. An outer tube 1 having a certain length, a rubber tube 2 which is inserted into the outer tube with approximately the same length, has both ends tightly joined to the outer tube, and has a slurry flow path on the inside, and one part of the outer tube. A plurality of slurry conveying pipes are connected in series, each consisting of a fluid press-in hole 5 for press-fitting a fluid between the outer tube and the rubber tube and a fluid discharge hole 6 for discharging the fluid. Slurry conveyance pipe 1
0 is connected to a hopper 13 for introducing slurry, and throttle valves 15a to 15 are connected to the fluid pressure injection holes of the plurality of slurry conveying pipes.
c through the pump, and the fluid discharge hole has a quick discharge valve 1.
6a to 16c, respectively, the pump and the rapid discharge valve are controlled in a predetermined cycle, and the rubber tube 2 is elastically deformed to sequentially transport the slurry.