JP3447758B2 - Solid-liquid recovery device and method of using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid-liquid recovery device using a vacuum suction device and a method of using the same, and has a low water content ratio, such as drainage discharge from a vertical shaft in shield work and recovery of sediment from a pump sand basin. It is intended for solid-liquid mixtures.

[0002]

2. Description of the Related Art Conventionally, there are many devices for recovering solid liquid such as mud and filth by using a vacuum generator, but they are basically classified into the following three systems.

First, as represented by vacuum vehicles,
When the collection tank is full, the vacuum generator is stopped, the tank hatch is opened, and the collected material is taken out. Secondly, the suction line is mechanically branched,
It has two collection tanks and alternately collects and discharges. Thirdly, a screw conveyor or a rotary valve is attached to the lower bottom of the recovery tank so that suction and discharge can be continuously performed while keeping the tank airtight.

However, in the first method, continuous suction cannot be performed, an artificial operation is required for discharging, and the suctioned substance stays in the pipe line during the interruption of the suctioning operation, so that the suctioning operation is often performed when the suctioning operation is restarted. May cause road blockage. In the second method, the size of the device becomes large, the pipeline structure is complicated, and there is a possibility that the branch portion may be blocked. In the third method, separate power sources are required for suction and discharge, and measures against wear of the discharge mechanism must be taken into consideration, and it becomes difficult to maintain airtightness in the tank due to the trapping of solid components. Become.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a solid-liquid recovery device in which continuous suction is performed by driving a vacuum generating device without interrupting the recovery work even during discharging work, and the structure is simple and clogging and abrasion hardly occur. To provide usage.

[0006]

According to the solid-liquid recovery apparatus of the present invention, the solid-liquid recovery apparatus for pumping the solid-liquid from the liquid supply source into the solid-liquid recovery tank through the lifting pipe by the operation of the vacuum generator is used. The inside of the liquid recovery tank is divided into upper and lower parts by a funnel to form the upper part in the distribution chamber and the lower part in the storage chamber. The solid-liquid recovery tank is equipped with a pressure conversion mechanism that has both the function of electrically connecting to the generator and the function of reducing the pressure in the storage chamber to the same pressure as the flow chamber and the function of increasing the pressure to atmospheric pressure when the vacuum generator operates. The bottom opening of the funnel holds the open state by its own elasticity when the pressure inside the flow chamber and the pressure inside the storage chamber are balanced, and the pressure inside the storage chamber is negative due to the negative pressure inside the flow chamber. When in equilibrium with atmospheric pressure, it is closed against its own elasticity A normally open type lip valve of No. 1 is attached, and when the pressure inside the storage chamber is balanced with the atmospheric pressure, the lower opening of the storage chamber keeps the open state by its own elasticity and stores with the flow chamber. A second normally open lip valve that is closed against the resilience of the room when the chamber becomes negative pressure is attached, and the open lower edge of the first normally open lip valve enters the reservoir chamber. The upper limit of the solid-liquid deposition is regulated so that the space for forming an air pocket is held above it.

When the solid-liquid recovery device of the present invention is used, the second normally open state is obtained by driving the vacuum generator and operating the pressure conversion mechanism in the direction in which the pressure inside the flow chamber and the storage chamber becomes negative. The mold lip valve is closed against its resilience, and the first normally open lip valve is kept open by its resilience, so that the solid liquid of the liquid supply source pumped from the lift pipe is inclined by the funnel. Along the surface into the storage chamber, and the solid-liquid flowing into the storage chamber reaches the open lower edge of the first normally-open lip valve, leaving a space for the air pool above it, and then into the flow chamber. Due to the difference in specific gravity, the remaining solid content in the solid-liquid is caused to flow down into the storage chamber, and due to the action of the air reservoir, the liquid content in the solid-liquid in the storage chamber is moved into the flow chamber, and the negative pressure in the flow chamber is maintained and the liquid is stored Pressure to increase the pressure in the room to the same pressure as atmospheric pressure By operating the changeover mechanism, the first
The normally open type lip valve is closed against its elasticity, and the second normally open type lip valve is returned to the open state by its own elasticity, so that the solid-liquid having a low water content is discharged from the storage chamber. is there.

[0008]

Embodiments will be described below with reference to the drawings of the embodiments.

In FIG. 1, 1 is a vacuum generator using a water-sealed vacuum pump or the like, 2 is a solid-liquid recovery tank whose negative pressure is generated by the operation of the vacuum generator 1, and a funnel 3 is provided inside the tank. The upper part is formed in the distribution chamber 2a and the lower part is formed in the storage chamber 2b by partitioning into the upper and lower chambers.
Reference numeral 4 denotes a pumping pipe which is guided down from the flow chamber 2a, and a guiding tip 4e thereof is introduced and opened into the liquid supply source 5. 6 is a liquid recovery tank that is interposed between the vacuum generator 1 and the flow chamber 2a, 7 is a liquid passage pipe that connects the flow chamber 2a and the liquid recovery tank 6 to each other, and 8 is an air intake of the vacuum generator 1. It is a ventilation pipe whose mouth is connected to the upper part of the liquid recovery tank 6. Reference numeral 9 is a communication conduit for connecting the storage chamber 2b and the distribution chamber 2a, and the inside thereof can communicate solid and liquid as shown in FIGS. 2 and 3 of the invention of Japanese Patent Application No. 3-149804, for example. It is desirable to have a structure in which only air is communicated with each other, and the lower pores 10 opened into the storage tank 2b and the upper pores 11 opened into the flow chamber 2a are connected by a pipe body. Reference numeral 13 is a vent for opening the storage chamber 2b into the atmosphere, which is opened in a branched manner from the communication conduit 9. Reference numeral 14 is a switching valve for alternately opening the communication pipe 9 and the vent 13, and is a storage valve 2b.
When the storage chamber 2b communicates with the atmosphere, the storage chamber 2b is disconnected from the atmosphere, and when the storage chamber 2b communicates with the atmosphere, the storage chamber 2b is disconnected from the distribution chamber 2a.
Communication with the storage chamber 2b is cut off, and conduction with the atmosphere
Cut off is opened and closed in so that. And aspect were also used in the for by the switching valve 14 of the four-way valve structure is one interposed branch point and vent closing communication duct for opening and closing the communication duct 9 and the vent 13 in the drawings embodiments However, it is also possible to adopt a mode in which two switching valves are used to open and close the communication conduit and the opening and closing of the ventilation port respectively. In this way, when the vacuum generator 1 is operated, a pressure conversion mechanism having both the function of reducing the pressure in the storage chamber 2b to the same pressure as the pressure in the flow chamber 2a and the function of increasing the pressure to the same pressure as the atmospheric pressure is configured. Of.

Reference numeral 15a is a first normally open lip valve mounted in the lower bottom rectangular hole 16 of the funnel 3, and 15b is a second normally open lip valve mounted in the lower bottom rectangular hole 16 of the storage chamber 2b. In both lip valves 15a and 15b, the upper edge of the rectangular tubular elastic film body as shown in FIGS. 2 and 3 is attached to the edge of the rectangular hole 16 through a mounting frame 16f as shown in FIG. Plate 16 which is fitted into the hole and guided down from the hole edge
g and 16g, inwardly bent fold lines 18 and 18 are vertically provided at the lower portions of the two walls 17a and 17a facing each other, and when the pressures inside and outside are balanced, the guide plate 16g,
The other two walls 17b, 17b communicating with the two walls 17a, 17a in a direction orthogonal to 16g are separated in parallel as shown in FIGS. 5 and 6 to open the rectangular hole 16, and the internal pressure is higher than the external pressure. If it gets lower, guide plates 16g, 16g
The lower portions of the two walls 17b, 17b orthogonal to each other are close to each other to form a closed state by surface contact as shown in FIGS. 7 and 8, thereby closing the rectangular hole 16. It should be noted that the first normally-open lip valve 1 mounted in the lower bottom rectangular hole 16 of the funnel 3
5a not only serves as a solid-liquid flow-down path when it is guided down into the storage chamber 2b and is opened, but also serves as a liquid-flow upward path from the storage chamber 2b to the distribution chamber 2a as described later. The open lower edge portion 15e preferably reaches below the opening position of the lower pore 10. 19, 19 are two walls 17b,
It is a reinforcing plate for increasing the strength of the inclined surface formed when 17b is closed.

Referring again to FIG. 1, 20 is a sand sensor for discharging the sediment deposited in the storage chamber 2b, 21 is a solid-liquid separation screen equipped in the flow chamber 2a,
The support member 22 fixed above the pumping pipe introducing port 4h on the inner surface of the peripheral wall of the circulation chamber 2a is arranged laterally in a loosely fit state so that a slight vertical vibration is possible. 23 is a submersible pump installed in the liquid recovery tank 6, 24 is a liquid return pipe led out from the discharge port of the submersible pump 23,
The leading end portion 24e is introduced and opened to the lower portion inside the liquid supply source 5.

[0012]

The pressure in the solid-liquid recovery tank 2 when the vacuum generator 1 is not driven is the same as the atmospheric pressure in both the flow chamber 2a and the storage chamber 2b. Both 15a and the second normally open lip valve 15b are kept open.

In the structure of the conduit shown in FIG. 1, the vacuum generator 1 is driven, the communication valve 9 is opened by the operation of the switching valve 14, and the conduction between the lower pore 10 and the vent 13 is cut off.
In this state, the atmosphere is sucked through the lower bottom rectangular hole 16 of the storage chamber 2b which is in contact with the atmospheric pressure, and the intake action thereof closes the second normally-open lip valve 15b as shown in FIG.
As the vacuum generator 1 is continuously driven, the inside of the solid-liquid recovery tank 2 has a negative pressure, so that the solid-liquid of the liquid supply source 5 is pumped by the pump 4 together with some air, as shown in FIG. is recovered into the flow chamber 2a flows down along the funnel 3 from the reservoir chamber 2b, reservoir chamber 2b at this time is due to a decrease in air volume
Since the pressure is lower than the atmospheric pressure, a pressure corresponding to a pressure difference from the atmospheric pressure acts on the second normally open type lip valve 15b to firmly close the lower bottom rectangular hole 16 and from inside the storage chamber 2b. The solid-liquid outflow is prevented and the airtightness is maintained.

When the second normally open type lip valve 15b is closed,
After a predetermined time has passed, the switching valve 14 is switched.
The communication pipe 9 is closed by the additional operation. Then, while the vacuum generator 1 is being driven, the solid liquid of the liquid supply source 5 is continuously fed through the pumping pipe 4, but as shown in FIG.
Solid-liquid recovered into the inner can leave space air entrapment 12 in its upper portion normally open lip valve 1 5 a opening lower edge portion 1 7 of
After reaching e, the liquid component cannot flow down into the storage chamber 2b and remains in the flow chamber 2a, and only the solid component having a large specific gravity flows down to push up the liquid level in the storage chamber 2b. Since its action is suppressed by the air pool 12 formed on the liquid surface, the liquid content in the storage chamber 2b can be moved backwards through the lower bottom rectangular hole 16 of the funnel 3 into the flow chamber 2a. become. In this way, solids having a low water content gradually accumulate in the storage chamber 2b with the lapse of time.

After a certain period of time, the changeover valve 14 is switched so that the lower air hole 10 and the vent hole 13 are separated from each other.
Since the negative pressure state in the storage chamber 2b is canceled due to conduction, the first normally open type lip valve 15a is closed and the second normally open type lip valve 15b is returned to the open state as shown in FIG. Then, the solid content having a low water content in the storage chamber 2b is a rectangular hole 16
Is discharged by its own weight. During this time, the inside of the flow chamber 2a is kept in a negative pressure state, and the solid-liquid is continuously fed from the pumping pipe 4. When the solid content in the storage chamber 2b is discharged, the communication valve 9 is opened by the switching operation of the switching valve 14, the ventilation port 13 is closed, and the inside of the storage chamber 2b is in a negative pressure state. The second normally open type lip valve 15b is closed and the first normally open type lip valve 15a is returned to the open state, and the solid-liquid is sent from the pumping pipe 4 to the flow chamber 2a as shown in FIG. Will flow down along the funnel 3 and will be collected in the storage chamber 2b. Since the closing operation of the first normally open type lip valve 15a and the second normally open type lip valve 15b is performed in such a manner that the elastic film bodies are brought into surface contact with each other to be closed, foreign matter such as sand grains are not generated. Even if the foreign matter is caught in the closing surface, the foreign matter is wrapped in the elastic film body, and the airtightness of the closing surface is maintained.

The switching operation of the switching valve 14 is as follows.
The operation may be automatically performed every predetermined time by setting the time of the timer, or may be performed electrically based on the detection signal obtained by detecting the sedimentation state of the sand by the sand sensor 20.

The liquid content in the flow chamber 2a is further removed by the solid-liquid separation screen 21, and the liquid content recovery tank 6
However, the screen 21 is mostly clogged due to the large cross-sectional area of water flow through the screen 21 and the low flow velocity, and the loose fit of the support member 22 to cause fine vertical vibration. There is no.

The liquid thus recovered in the liquid recovery tank 6 is returned to the original liquid supply source 5 through the liquid return pipe 24 by the operation of the submersible pump 23.
When the liquid component flows out from the lead-out tip portion 24e, the mixing and stirring action in the liquid supply source 5 is caused to facilitate the suction of the solid component from the pumping pipe tip portion 3e.

[0019]

According to the solid-liquid recovery apparatus and the method of using the same of the present invention, solid-liquid recovery of sludge and earth and sand having a high specific gravity and viscosity can be achieved without causing troubles such as a simple structure and mechanical abrasion and entanglement. Effectively and continuously, the solid-liquid recovery is performed without interrupting the suction work even during the discharge of the recovered material, and the recovered solid-liquid becomes solid with a low water content in the recovery tank. It has the advantage that it is discharged and the liquid can be used separately.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a pipeline of a solid-liquid recovery device of the present invention.

FIG. 2 is a perspective view showing an open state of a rectangular tube-shaped elastic film body which constitutes a normally open type lip valve mounted on the solid-liquid recovery device of the present invention.

FIG. 3 is a perspective view in a closed state of a rectangular tube-shaped elastic film body that constitutes a normally-open type lip valve attached to the solid-liquid recovery device of the present invention.

FIG. 4 is a perspective view of a mounting frame of a normally-open lip valve mounted on the solid-liquid recovery device of the present invention.

FIG. 5 is a vertical cross-sectional side view of a normally open lip valve mounted on the solid-liquid recovery device of the present invention in an open state.

6 is a cross-sectional plan view taken along the line AA of FIG.

FIG. 7 is a vertical cross-sectional side view of the normally-open lip valve mounted on the solid-liquid recovery device of the present invention when it is closed.

8 is a cross-sectional plan view taken along the line BB of FIG.

FIG. 9 is an explanatory diagram of an operation mode in the solid-liquid recovery apparatus of the present invention, showing a state in which the solid-liquid recovery system is prepared by driving the vacuum suction device.

FIG. 10 is an explanatory diagram of an operation mode in the solid-liquid recovery device of the present invention, showing a state in which the solid-liquid pumped by the lifting pipe flows down into the storage chamber along with the funnel.

FIG. 11 is an explanatory view of an operation mode in the solid-liquid recovery device of the present invention, in which the solid-liquid in the storage chamber leaves an air storage space in an upper portion thereof, and an opening lower edge of the first normally-open type lip valve. Shows the state of reaching the section.

FIG. 12 is an explanatory view of an operation mode in the solid-liquid recovery device of the present invention, showing a state in which solids accumulated in the storage chamber are discharged from the lower bottom portion.

[Explanation of symbols]

1 Vacuum generator 2 Solid-liquid recovery tank 2a Distribution room 2b Storage room 3 funnel 4 Lifting pipe 5 Liquid source 12 Air pool 15a First normally open lip valve 15b Second normally open lip valve 17e Open lower edge

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-6-17799 (JP, A) JP-A-6-147197 (JP, A) JP-A-4-60027 (JP, A) JP-A-63- 253200 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) F04F 3/00 F04F 1/14 E02F 3/94 E02F 7/00 B01D 43/00 C02F 11 / 00-11 / 20

Claims (2)

(57) [Claims] 1. A solid-liquid recovery device for pumping solid-liquid from a liquid supply source (5) into a solid-liquid recovery tank (2) through a pumping pipe (4) by the operation of a vacuum generator (1). , The interior of the solid-liquid recovery tank (2) is divided into upper and lower parts by a funnel (3) to form an upper part thereof as a flow chamber (2a) and a lower part thereof as a reservoir chamber (2b). ) And the flow chamber (2a) are electrically connected by the pumping pipe (4), the flow chamber (2a) and the vacuum generator (1) are electrically connected, and the storage chamber (2b) is activated when the vacuum generator (1) is operated. The solid-liquid recovery tank (2) is equipped with a pressure conversion mechanism having both a function of reducing the internal pressure to the same pressure as the inside of the flow chamber (2a) and a function of increasing the internal pressure to the same pressure as the atmospheric pressure,
When the pressure inside the flow chamber (2a) and the pressure inside the storage chamber (2b) are balanced, the open bottom of the funnel (3) holds the open state by its own elasticity, and the flow chamber ( Provided with a first normally open type lip valve (15a) which is closed against the elasticity of itself when the pressure in the storage chamber (2b) is in equilibrium with the negative pressure in the storage chamber (2b). However, the lower bottom hole of the storage chamber (2b) maintains an open state by its own elasticity when the pressure in the storage chamber (2b) is balanced with the atmospheric pressure, and together with the flow chamber (2a). A second normally-open lip valve (15b), which is closed when the inside of the storage chamber (2b) becomes a negative pressure, is closed against the elasticity of the first normally-open lip valve ( 1
5a) open lower edge (17e) allows storage chamber (2a)
A solid-liquid recovery device characterized in that the upper limit of the solid-liquid deposition inside is regulated and a space for forming an air reservoir (12) is held above the upper limit. 2. A pressure converting mechanism is operated in a direction in which the vacuum generating device (1) in the solid-liquid recovery device according to claim 1 is driven and the inside of the flow chamber (2a) and the inside of the storage chamber (2b) are negative pressure. By doing so, the second normally-open lip valve (15b) is closed against its elasticity and the first normally-open lip valve (15a) is held in the open state by its own elasticity.
The solid-liquid of the liquid supply source (5) pumped from the pumping pipe (4) is caused to flow down into the storage chamber (2b) along the inclined surface of the funnel (3),
After the solid-liquid flowing down into the storage chamber (2b) reaches the open lower edge (17e) of the first normally-open lip valve (15a), leaving a space for the air reservoir (12) above it. The solid content in the solid-liquid remaining in the flow chamber (2a) is caused to flow down into the storage chamber (2b) due to the difference in specific gravity, and the air pool (1
By the action of 2), the liquid content in the solid liquid in the storage chamber (2b) is moved into the distribution chamber (2a), and the inside of the storage chamber (2b) is maintained while maintaining the negative pressure state in the distribution chamber (2a). By operating the pressure conversion mechanism in the direction of increasing the pressure to the atmospheric pressure, the first
The normally open type lip valve (15a) is closed against its resilience and the second normally open type lip valve (15b) is returned to the open state by its own resilience to remove the solid-liquid having a low water content ratio. A method of using a solid-liquid recovery device, characterized in that the solid-liquid recovery device is discharged from the storage chamber (2b).