JPH0377400B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention is a method for continuously transporting muddy materials containing solid lumps during dredging work, snow piles containing earth and sand, etc.
This relates to a gas/liquid suction separation device.

[Conventional technology]

Conventionally, this type of device introduces negative pressure into a sealed container,
With this negative pressure, sludge containing solids and snow piles containing earth and sand are sucked into the sealed container from the suction pipe connected to the sealed container, and the container is opened to cause the gas to rise and solidify. There is a system that separates solids, gases, and liquids in the flow by allowing the substances and liquids to settle in a container.

[Problem to be solved by the invention]

The solid/gas/liquid suction separator of the above-mentioned conventional structure is of a so-called batch type, so whenever water or solid lumps stored in a sealed container after being separated from the fluid exceed a certain amount, solid/gas/liquid suction is performed. This requires stopping the operation of the separator to remove the water and solids in the sealed container, which poses the problem of extremely low operating efficiency. Therefore, in order to operate continuously for the desired long period of time, the sealed container must have a large capacity for solid matter and water, and the entire solid/gas/liquid suction separation device must be large. Moreover, there was a problem in that the initial cost of the device was also high. Moreover, when the sealed container is formed in a large size, it takes time to create sufficient negative pressure within the sealed container at the beginning of operation, resulting in a problem that the operating efficiency becomes extremely low. The present invention has been proposed in view of these problems, and allows continuous operation for long periods of time while making the entire device compact, and also shortens the start-up time at the initial stage of operation as much as possible to improve operating efficiency. It is intended to be enhanced.

[Means to solve the problem]

In order to achieve the above object, the present invention opens the lower end of a suction tank, immerses the opening in liquid to seal it with liquid, and introduces negative pressure formed by a negative pressure forming means into the suction tank. At the same time, connect a negative pressure introduction pipe to the upper part of the suction tank, and connect one end of the fluid suction pipe that opens toward the object to be aspirated and the other end of the fluid suction pipe to open into the suction tank, so that the negative pressure that acts from the negative pressure introduction pipe The suction tank was positioned so that the suction resistance sucked into the suction tank from the opening of the fluid suction pipe was smaller than the negative pressure inside the suction tank, which was expressed by the water head difference in the suction tank. It is characterized by this.

[Effect]

First, when the negative pressure generated by the negative pressure forming means is introduced into the suction tank, liquid is sucked from the lower end opening of the suction tank to a position where it balances with this negative pressure. At the same time, the negative pressure in the suction tank also acts on the fluid suction pipe, but due to the negative pressure acting from the negative pressure introduction pipe, the negative pressure in the suction tank, which is indicated by the water head difference in the suction tank, Since the suction tank is positioned so that the suction resistance to suction into the suction tank from the opening of the suction pipe is smaller, the fluid containing solids and gas is sucked into the suction tank. Ru. Of the fluid sucked into the suction tank, gas is absorbed by the negative pressure suction means from the negative pressure introduction pipe, the liquid is mixed with the sealing liquid, and solids settle into the sealing liquid and are removed from the bottom end. It is discharged from the opening to the outside of the suction tank. At this time, the negative pressure in the suction tank and the sealing liquid sucked by this negative pressure are balanced, so the solid/gas/liquid suction separator is operated and the solid is separated from the fluid. Since the lumps are automatically discharged from the lower end opening of the suction tank, the solid/gas/liquid suction separator can be operated continuously for a long period of time.

【Example】

Embodiments of the present invention will be described below based on the drawings. Embodiment 1 (See Figures 1 to 3) The continuous solid/gas/liquid salt suction separator 1 according to this embodiment is used to transport or suck snow. So, this continuous type solid/air/
As shown in FIG. 1, the liquid suction separation device 1 includes a water seal tank 2 with a large diameter and an opening at the top, and a bottom opening 3.
a suction tank 3 arranged in a state where a is inserted from the upper opening of the water seal tank 2; a negative pressure supply means 4 that supplies negative pressure to the suction tank 3; It consists of a fluid suction pipe 5 that sucks in snow containing solid objects such as sand and stones under pressure. The water sealing tank 2 has a bottom portion 2a formed in a tapered shape, and a valve 6 at the bottom end.
A discharge port 7 that can be opened and closed is formed, and water 8 for water sealing is stored inside. The suction tank 3 is formed into a cylindrical shape with a lid. A negative pressure introduction pipe 9 of a negative pressure supply means 4, which will be described later, is connected to a canopy 3b, and a fluid suction pipe 5 near the proximal end is connected to a side wall 3c. The opening 5b at the proximal end into which the portion 5a is inserted is opened downward. Further, the tip opening 5c of the fluid suction pipe 5 is connected to the snow (substance to be sucked) 1 containing sand and pebbles to be sucked.
It is opened toward 0. The negative pressure forming means 4 includes a high pressure water forming pump 1
1, high-pressure water generated by the high-pressure water forming pump 11 is injected from the nozzle 12 toward the protective tube 14 having the air introduction tube 13, and this jet water flow is used to generate the negative pressure forming tube 15 in front of the protective tube 14. It consists of a mixed jet pump 16 which is adapted to form a negative pressure therein, and the negative pressure introduction pipe 9 which introduces the negative pressure in the negative pressure forming pipe 15 into the suction tank 3. As shown in FIG. 3, the lower end opening 3a of the suction tank 3 is formed by first squeezing the lower end portion of the suction tank 3 into a tapered shape, and then forming the tip end into a short cylindrical shape with a small diameter. Of course, it is also possible to do so. Next, the operation of the solid/gas/liquid suction separator 1 configured as described above will be explained. First, when the high-pressure water forming pump 11 is driven and a negative pressure is formed in the negative pressure forming pipe 15, this negative pressure turns the inside of the suction tank 3 into a negative pressure through the negative pressure introduction pipe 9. When the inside of the suction tank 3 becomes negative pressure, the lower end opening 3
Since a is sealed with water 8 stored in the water sealing tank 2, the water 8 in the water sealing tank 2 is placed at a position (for example, the second
At the same time, the negative pressure inside the suction tank 3 also acts on the fluid suction pipe 5, so the snow 10 containing sand and pebbles is sucked up from the fluid suction pipe 5. is sucked into the suction tank 3. At this time, even if the snow 10 contains sand and pebbles, it contains a lot of air, and its specific gravity is lighter than the water 8 in the suction tank 3, so there is less suction resistance.
Snowfall 10 containing sand and pebbles is sucked from the fluid suction pipe 5. In this way, the snow 10 containing sand and pebbles sucked into the suction tank 3 is mixed with the rising water 8 inside the suction tank 3, and gases such as air contained in the fluid are transferred to the negative pressure introduction pipe 9. Through the negative pressure forming means 4
At the same time, snow components are absorbed into the air-fuel mixture jet pump 16, and the snow components are mixed with the rising water in the suction tank 3, and solids such as sand and pebbles contained therein are removed from the lower end opening of the suction tank 3. 3a to the bottom 2a of the water sealing tank 2, and as a result, solids and
Gas and liquid will be separated. When the amount of water stored in the water sealing tank 2 due to solid lumps such as sand and pebbles accumulated on the bottom 2a of the water sealing tank 2 or water separated from the fluid and fused exceeds a certain amount, the valve 6 is turned off. When it is opened, the solids and water 8 are discharged to the outside of the water-sealing tank 2 and removed. When this valve 6 is operated, the suction tank 3
Since this does not have any adverse effect on the negative pressure inside, the solid/gas/liquid suction separator 1 can be operated while removing solids and water. In addition, when solids and water 8 are removed outside the water sealing tank 2, the water level 8a inside the water sealing tank 2 decreases, so the head difference (water head) with the water level 8b inside the suction tank 3 decreases.
H ₂ ) becomes larger, so that the fluid suction force of the fluid suction pipe 5 becomes even stronger. Embodiment 2 (See Fig. 4) The continuous solid/gas/liquid suction separator 1 according to this embodiment is used in dredging work for dams and ports. For example, in the case of dredging work for dam D. A solid/gas/liquid suction separation device 1 configured in the same manner as in Example 1 is installed on the side of the dam D, and the tip opening 5c of the fluid suction pipe 5 is directed toward the sludge (substance to be sucked) 10 on the lake bottom. It is designed so that it can be opened. At this time, from the water surface Da of dam D to the suction tank 3
The solid/gas/liquid suction separation device 1 is installed so that the height H ₁ to the fluid suction pipe 5 connected to the suction pipe 5 is less than the water head H ₂ of the water surface 8b raised in the suction tank 3 due to negative pressure. Next, the operation of the solid/gas/liquid suction separator 1 configured as described above will be explained. When the high-pressure water forming pump 11 is driven and negative pressure is formed in the negative pressure forming pipe 15, this negative pressure turns the inside of the suction tank 3 into a negative pressure through the negative pressure introduction pipe 9. When the inside of the suction tank 3 becomes negative pressure, the lower end opening 3
Since point a is sealed with water 8 stored in the water sealing tank 2, the water 8 in the water sealing tank 2 is placed at a position where the negative pressure in the suction tank 3 is balanced (for example, the fourth
At the same time, the negative pressure in the suction tank ₃ also acts on the fluid suction pipe 5. In this way, when the same negative pressure as in the suction tank 3 acts on the fluid suction pipe 5, the water head _H1 from the water surface Da of the dam D to the fluid suction pipe 5 connected to the suction tank 3 is increased within the suction tank 3. Since the solid/gas/liquid suction separation device 1 is installed so that the water head of the rising water surface 8b is less than _H2 , the sludge 10 on the lake bottom is sucked into the suction tank 3 from the fluid suction pipe 5. . The sludge 10 sucked into the suction tank 3 is
The water is mixed with the water 8 that has risen in the suction tank 3, and the water is mixed with the water that has risen in the suction tank 3. It settles to the bottom 2a of the storage tank 2. If the water level 8b in the suction tank 3 rises due to the water sucked in from the fluid suction pipe 5, the water head _H2 of the rising water level 8b in the suction tank 3 will become higher and the water level in the suction tank 3 will rise. As a result, the air is sucked back from the negative pressure supply means 4 until the weight of the water in the suction tank 3 and the negative pressure in the suction tank 3 are balanced. The water level remains approximately constant. In this embodiment, the height from the water surface Da of the dam D to the fluid suction pipe 5 connected to the suction tank 3 is
The solid/gas/liquid suction separation device 1 is installed so that H ₁ is less than the water head H ₂ of the water surface 8b that has risen in the suction tank 3 due to negative pressure, but this is limited to such a position. Instead, for example, if air is mixed into the fluid in the fluid suction pipe 5 to reduce the specific gravity of the fluid in the fluid suction pipe 5, the negative pressure in the suction tank 3 can suck the sludge 10 etc. from the suction pipe 5. It is possible to do so. Further, instead of reducing the specific gravity, it is also possible to configure it as in Example 3, which will be described later. Example 3 (see Figures 5 to 7) Solid/gas/liquid suction separation device 1 according to this example
This is the same as in the first embodiment or the second embodiment, in which a flap valve 17 is formed at the lower end opening 3a of the suction tank 3. That is, the flap valve 17 is formed into a thin plate shape, and its left end portion is fixed to the left upper end portion of the lower end opening 3a of the suction tank 3, which is formed downward to the right in the figure, and the right side portion is configured to open and close. There is. In the solid/gas/liquid suction separator 1 configured as described above, the high pressure water forming pump 11 is driven, and the negative pressure formed in the negative pressure forming pipe 15 is transferred to the negative pressure introducing pipe 9.
At the initial stage of operation, the water level 8a of the suction tank 3 is approximately at the same position as the water level 8a of the water sealing tank 2, as shown by the imaginary line A in FIG. Negative pressure acts on tank 3. Then, the flap valve 17 closes the lower end opening 3a of the suction tank 7 due to this negative pressure, so the negative pressure acting on the suction tank 3 immediately acts on the fluid suction pipe 5, which significantly reduces the startup time. In addition, the height H 1 from the water surface Da of the dam D to the fluid suction pipe 5 connected to the suction tank 3 _can be Even if the solid/gas/liquid suction separation device 1 is not installed so that the water head 8b that rises in the suction tank ₃ due to the negative pressure is less than H2, the negative pressure in the suction tank 3 will cause the water to flow from the suction pipe 5. Sludge 10 etc. can be sucked out. In addition, the water in the fluid sucked into the suction tank 3 is fused with the water 8 in the suction tank 3, and the water level 8b is at a height position (solid line in Figure 6) that balances the negative pressure in the suction tank 3. When the flap rises to position B), the negative pressure of the suction tank 3 hardly acts on the opening 3a covered by the flap valve 17, so the right end of the flap valve 17 opens due to the weight of the solid lumps accumulated here. Water sealing tank 2
It will automatically settle to the bottom 2a of the container. In the above embodiment, the lower end opening 3a of the suction tank 3, in which the flap valve 17 is provided, is formed so that its left end is downward to the right in the figure, but as shown in FIG. Of course, it is also possible to once squeeze the lower end into a tapered shape, and then form a short cylinder with a small diameter at the lower end to form the lower end opening 3a, and the flap valve 17 may be provided here. It is. Further, in each of the above embodiments, water is stored in the water sealing tank 2 to form a liquid for sealing the lower end opening 3a of the suction tank 3, but in the present invention, water sealing is not necessarily required. The suction tank 2 is not essential; for example, a suction tank 3 can be installed in a river or pond in place of the water seal tank 2. Further, in each of the embodiments described above, the opening 5b on the proximal end side of the fluid suction pipe 5 is opened above the water surface 8 of the suction tank 3, but this can be changed, for example, as shown in FIG. Of course, the suction tank 3 may be opened below the water surface 8a. At this time, as described in the second embodiment, it is necessary to mix air into the fluid in the fluid suction pipe 5 to reduce the specific gravity of the fluid in the fluid suction pipe 5.

【Effect of the invention】

As explained above, according to the present invention,
The solid, gas, and liquid separated from the fluid can be automatically discharged while the gas/liquid suction separation device is operating, so there is no need to make a large suction tank, and the entire device can be made smaller. It can be done. Moreover, the fluid sucked into the suction tank by the negative pressure of the negative pressure forming means is separated into solid, gas, and liquid in the suction tank, and solid lumps are separated from the fluid accumulated at the bottom of the suction tank. Since substances can be automatically discharged, continuous operation can be performed for a long period of time, and the operating efficiency of the solid/gas/liquid suction separation device can be greatly improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal side view showing a schematic configuration of a solid/gas/liquid suction separation device according to Embodiment 1, and FIG. 2 is an explanatory diagram of the operation of the main parts thereof. , FIG. 3 is a longitudinal sectional side view of a main part showing a modification, FIG. 4 is a longitudinal sectional side view showing a schematic configuration of the solid/gas/liquid suction separation device according to the second embodiment, and FIG. 5 is a longitudinal sectional side view of the main part showing a modification. 6 is an explanatory diagram of the operation of the main parts thereof, and FIG. 7 is a longitudinal sectional side view of the main parts showing a modified example. FIG. 8 is a schematic longitudinal sectional side view of the main parts showing a modification of the mounting position of the opening at the proximal end of the fluid suction pipe. DESCRIPTION OF SYMBOLS 1... Solid/gas/liquid suction separation device, 2... Water seal tank, 3... Suction tank, 3a... Lower end opening of 3, 4... Negative pressure forming means, 5... Fluid suction pipe , 7...Exhaust port, 9...Negative pressure introduction pipe.

Claims (1)

[Claims] 1. Negative pressure introduction in which the lower end of the suction tank is opened, the opening is immersed in liquid to seal it, and the negative pressure formed by the negative pressure forming means is introduced into the suction tank. The pipe is connected to the upper part of the suction tank, and one end of the fluid suction pipe is opened toward the object to be aspirated, and the other end of the fluid suction pipe is opened into the suction tank, and the suction tank is closed by the negative pressure acting from the negative pressure introduction pipe. The suction tank is positioned so that the suction resistance sucked into the suction tank from the opening of the fluid suction pipe is smaller than the negative pressure in the suction tank expressed by the difference in water head between the suction tanks. Continuous solid/gas/liquid suction separation equipment. 2. The continuous solid/gas/liquid suction separation device according to claim 1, wherein the liquid sealing the lower end opening of the suction tank is water. 3 Store sealing liquid in a liquid sealing tank that is open at the top and has a discharge port at the bottom, and open the lower end opening of the suction tank in the sealing liquid of the liquid sealing tank. Claim 1 or 2
Continuous solid/gas/liquid suction separator described in . 4. The continuous solid/gas/liquid suction separation device according to any one of claims 1 to 3, wherein the lower end opening of the suction tank is provided with a valve for increasing negative pressure.