JP3447756B2 - Solid-liquid recovery device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid-liquid recovery device using a vacuum suction device, for example, drainage discharge from a shaft in shield work, and collection of sediment from a pump sand basin. For example, a solid-liquid mixture having a low water content is targeted. 2. Description of the Related Art Conventionally, there are many devices for collecting solid and liquid such as mud and dirt using a vacuum generator, but they are basically classified into the following three types. [0003] First, as typified by vacuum vehicles,
When the collection tank is full, the operation of the vacuum generator is stopped and the tank hatch is opened to take out the collection. Second, the suction line is mechanically branched,
Two collection tanks are installed to alternately collect and discharge. Third, a screw conveyor or a rotary valve is attached to the lower bottom of the recovery tank to continuously suction and discharge while maintaining the airtightness in the tank. [0004] However, in the first method, continuous suction cannot be performed, and manual operation is required at the time of discharge. In addition, the suction material stays in the pipeline while the suction operation is interrupted, and the suction operation is frequently performed when the suction operation is restarted. May cause road blockage. In the second method, the device becomes large-scale, the pipe configuration is complicated, and there is a possibility that the branch portion may be blocked. In the third method, a separate power source is required for suction and discharge, and measures must be taken to prevent the discharge mechanism from being worn. Become. SUMMARY OF THE INVENTION It is an object of the present invention to perform a continuous suction by driving a vacuum generating device without interrupting a recovery operation even during a discharge operation, and to have a simple structure and a solid-liquid recovery hardly causing blockage and abrasion. It is to provide a device. In a solid-liquid recovery apparatus according to the present invention, a solid-liquid recovery apparatus for pumping solid-liquid from a liquid supply source into a solid-liquid recovery tank via a pumping pipe by operating a vacuum generator. , The inside of the solid-liquid recovery tank is vertically divided by a funnel, the upper part thereof is formed as a flow chamber, and the lower part is formed as a storage chamber. A liquid recovery tank is interposed between the chamber and the vacuum generator, and the circulation chamber and the liquid recovery tank are connected by a liquid pipe, and the suction port of the vacuum generator and the liquid recovery tank are connected by a ventilation pipe. The solid-liquid separation screen is laid laterally in a free ring shape so that it can be finely vibrated in the vertical direction by the support material fixed above the lifting pipe introduction port on the inner surface of the peripheral wall of the flow chamber, and the operation of the vacuum generator Sometimes the pressure in the storage chamber is reduced to the same pressure as in the distribution chamber The solid-liquid recovery tank is equipped with a pressure conversion mechanism that has both the function and the function of increasing the pressure to the same pressure as the atmospheric pressure.The lower bottom opening of the funnel balances the pressure in the flow chamber and the pressure in the storage chamber. The first normally-open state is closed when the open state is maintained by its own elasticity and the pressure in the storage chamber is balanced with the atmospheric pressure due to the negative pressure in the circulation chamber and the atmospheric pressure. A mold lip valve is attached, and the lower bottom opening of the storage chamber holds the open state by its own elasticity when the pressure in the storage chamber is balanced with the atmospheric pressure, and the storage chamber and the circulation chamber have a negative pressure. , A second normally-open lip valve, which is closed against its own elasticity, is provided. An embodiment will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a vacuum generator using a water-sealed vacuum pump or the like, and 2 denotes a solid-liquid recovery tank which is made negative pressure by the operation of the vacuum generator 1, and the inside thereof is a funnel 3 , The upper part is formed in the circulation chamber 2a and the lower part is formed in the storage chamber 2b.
Reference numeral 4 denotes a lifting pipe guided from the flow chamber 2a, and a leading end 4e of the pipe is introduced into the liquid supply source 5 for opening. Reference numeral 6 denotes a liquid collection tank interposed between the vacuum generator 1 and the circulation chamber 2a, 7 denotes a liquid passage pipe that connects the circulation chamber 2a and the liquid collection tank 6, and 8 denotes an intake of the vacuum generation apparatus 1. This is a vent pipe whose mouth is connected to the upper part of the liquid recovery tank 6. Reference numeral 9 denotes a communication pipe for communicating between the storage chamber 2b and the distribution chamber 2a. The inside of the communication pipe 9 communicates solid and liquid as shown in FIGS. 2 and 3 in the invention of Japanese Patent Application No. 3-149804. It is desirable to have a structure in which only air is communicated, and the lower air hole 10 opened into the storage tank 2b and the upper air hole 11 opened into the flow chamber 2a are connected by a pipe. Reference numeral 13 denotes a ventilation port for opening the storage chamber 2b into the atmosphere, and is opened in a form of branching out from the communication pipe 9. Reference numeral 14 denotes a switching valve for alternately opening the communication pipe 9 and the ventilation port 13, and is a storage valve 2b.
And when the flow chamber 2a is communicated with the continuity between the storage chamber 2b and the atmosphere is cut off, when the storage chamber 2b is electrically connected to the atmosphere communication between reservoir chamber 2b and distribution chamber 2a is cut off, also flow chamber 2a
And the communication with the atmosphere is cut off
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, a mode may be used in which two switching valves are used to open and close the communication pipeline and open and close the ventilation port using separate switching valves. In this manner, a pressure conversion mechanism having a function of reducing the pressure in the storage chamber 2b to the same pressure as that in the flow chamber 2a and a function of raising the pressure to the same pressure as the atmospheric pressure when the vacuum generator 1 is operated are configured. It is. Reference numeral 15a denotes a first normally open lip valve mounted on the lower bottom rectangular hole 16 of the funnel 3, and 15b denotes a second normally open lip valve mounted on the lower bottom rectangular hole 16 of the storage chamber 2b. These lip valves 15a and 15b are connected to the upper edge of the rectangular tubular elastic membrane as shown in FIGS. 2 and 3 through the mounting frame 16f as shown in FIG. Guide plate 16 fitted into the hole and guided from the edge of the hole.
g, 16g, longitudinally extending inwardly bent fold lines 18, 18 are provided below the two opposing walls 17a, 17a, respectively. When the internal and external pressures are balanced, the guide plates 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 lower than the external pressure. If it is also low, guide plates 16g, 16g
The lower portions of the two walls 17b, 17b, which are orthogonal to, close the rectangular hole 16 by forming a closed state by surface contact close to each other as shown in FIGS. The first normally open lip valve 1 attached to the lower bottom rectangular hole 16 of the funnel 3
5a is guided not only into the storage chamber 2b and becomes a solid-liquid flow-down path at the time of opening, but also becomes a liquid rise path from the storage chamber 2b to the flow chamber 2a as described later. It is desirable that the open lower edge portion 15e extends below the opening position of the lower air hole 10. 19, 19 are two walls 17b,
17b is a reinforcing plate for increasing the strength of the inclined surface formed when closing 17b. Referring again to FIG. 1, reference numeral 20 denotes a sand sensor for discharging the sediment deposited in the storage chamber 2b, and reference numeral 21 denotes a solid-liquid separation screen provided in the flow chamber 2a.
The support member 22 fixed above the lifting pipe introduction port 4h on the inner surface of the peripheral wall of the flow chamber 2a has a mode in which the support member 22 is loosely fitted and horizontally shakes vertically. Reference numeral 23 denotes a submersible pump installed in the liquid recovery tank 6, and 24 denotes a liquid return pipe led out from a discharge port of the submersible pump 23.
The leading end 24 e is opened to the lower part in the liquid supply source 5. The pressure in the solid-liquid recovery tank 2 when the vacuum generator 1 is not driven is the first normally open pressure since the flow chamber 2a and the storage chamber 2b are the same as the atmospheric pressure. The mold lip valve 15a and the second normally open lip valve 15b are both kept open. When the vacuum generator 1 is driven in the pipe configuration shown in FIG. 1 and the switching valve 14 is operated, the communication pipe 9 is opened and the conduction between the lower hole 10 and the vent 13 is cut off.
If a state, the second normally open lip valve 15b as shown in FIG. 9 by its inspiration by sucking air from the lower bottom rectangular hole 16 of the storage chamber 2b in contact with the atmospheric pressure is closed,
As the vacuum generator 1 continues to be driven, the inside of the solid-liquid recovery tank 2 becomes negative pressure, so that the solid-liquid from the liquid supply source 5 is pumped up by the pumping pipe 4 together with some air, as shown in FIG. It flows down from the flow chamber 2a along the funnel 3 and is collected into the storage chamber 2b. At this time, the inside of the storage chamber 2b is reduced due to a decrease in the amount of air.
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 lip valve 15b, and the lower bottom rectangular hole 16 is firmly closed, so that the inside of the storage chamber 2b is removed. Out of the solid-liquid is prevented and the airtightness is maintained. When the second normally open lip valve 15b is closed,
When a predetermined time elapses from the switching of the switching valve 14
By this operation, the communication line 9 is closed. While the vacuum generator 1 is being driven, the solid liquid of the liquid supply source 5 is continuously fed through the pumping tube 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 solids having a large specific gravity flow down to push up the liquid surface in the storage chamber 2b. Since the effect is suppressed by the air reservoir 12 formed on the liquid surface, the liquid component in the storage chamber 2b is conversely moved back to the lower bottom rectangular hole 16 of the funnel 3 and into the distribution chamber 2a. become. In this way, solids having a low water content gradually accumulate in the storage chamber 2b as time passes. After a certain period of time, the switching operation of the switching valve 14 causes the lower air hole 10 and the air hole 13 to be closed.
Since the connection is conducted and the negative pressure state in the storage chamber 2b is eliminated, the first normally-open lip valve 15a closes and the second normally-open lip valve 15b returns to the open state as shown in FIG. The solid having a low water content in the storage chamber 2b is
Is discharged by its own weight. During this time, the inside of the flow chamber 2a is maintained in a negative pressure state, and the solid-liquid is continuously fed from the lifting pipe 4. When the solids in the storage chamber 2b have been discharged, the switching pipe 14 is switched to open the communication pipe 9 and the ventilation port 13 to the closed state, so that the storage chamber 2b is in a negative pressure state. The second normally-open lip valve 15b closes and the first normally-open lip valve 15a returns to the open state, and the solid-liquid that is fed into the flow chamber 2a from the lifting pipe 4 as shown in FIG. Flows down along the funnel 3 and is collected into the storage chamber 2b. Note that the closing operation of the first normally-open lip valve 15a and the second normally-open lip valve 15b is performed in such a manner that the elastic membranes are brought into surface contact with each other and closed, so that foreign matter such as sand particles may be removed. 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 performed as follows.
The operation may be automatically performed at predetermined time intervals by a timer setting, or may be electrically performed based on a detection signal obtained by detecting the sedimentation state of the sand by the sand sensor 20. The liquid in the circulation chamber 2a is further removed by a solid-liquid separation screen 21 and the liquid recovery tank 6
However, the screen 21 has a large cross-sectional area of water flow and a low flow velocity. Also, the screen 21 is loosely fitted by the support member 22 and slightly vibrates up and down, thereby causing almost no clogging of the screen. There is no. The liquid recovered in the liquid recovery tank 6 in this way 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 leading end portion 24e, a mixing and stirring action is generated in the liquid supply source 5, thereby facilitating the suction of the solid from the pumping tube distal end portion 3e. According to the solid-liquid recovery apparatus of the present invention, it is possible to effectively recover solid-liquid such as sludge or earth and sand having a high specific gravity and high viscosity without causing troubles such as mechanical abrasion and entanglement with a simple structure. Also, during the discharge of the collected material, the solid-liquid is continuously collected without interrupting the suction operation, and the collected solid-liquid is discharged as a solid having a low water content in the collection tank. There is an advantage that the liquid component can be separately used.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a pipeline configuration of a solid-liquid recovery device of the present invention. FIG. 2 is a perspective view showing an open state of a rectangular tubular elastic membrane constituting a normally-open 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 tubular elastic membrane constituting a normally-open lip valve mounted on 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 sectional side view of the normally-open lip valve mounted on the solid-liquid recovery device of the present invention in an open state. FIG. 6 is a cross-sectional plan view taken along line AA of FIG. FIG. 7 is a vertical sectional side view of the normally-open lip valve mounted on the solid-liquid recovery device of the present invention at the time of closing operation. FIG. 8 is a cross-sectional plan view taken along the line BB of FIG. 7; FIG. 9 is an explanatory view of an operation mode in the solid-liquid recovery device of the present invention, and shows a state in which a solid-liquid recovery system is prepared by driving a vacuum suction device. FIG. 10 is an explanatory view of an operation mode in the solid-liquid recovery apparatus of the present invention, and shows a state in which solid-liquid pumped by a pumping pipe flows down into a storage chamber along a funnel. FIG. 11 is an explanatory view of an operation mode in the solid-liquid recovery device of the present invention, wherein the solid-liquid in the storage chamber leaves a space for an air reservoir above the open lower edge of the first normally-open lip valve; Shows the state that has reached the part. FIG. 12 is an explanatory view of an operation mode in the solid-liquid recovery device of the present invention, showing a state where solids accumulated in a storage chamber are discharged from a lower bottom portion. [Description of Signs] 1 Vacuum generator 2 Solid-liquid recovery tank 2a Flow chamber 2b Storage chamber 3 Funnel 4 Lifting pipe 4h Lifting pipe inlet 5 Liquid supply source 6 Liquid recovery tank 7 Liquid flowing pipe 8 Vent pipe 15a 1 normally open type lip valve 15b 2nd normally open type lip valve 21 solid-liquid separation screen 22 support material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References 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 investigated (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 (1)

(57) [Claims] The solid-liquid is pumped from the liquid supply source (5) into the solid-liquid recovery tank (2) via the pumping pipe (4) by the operation of the vacuum generator (1). In the liquid recovery apparatus, the inside of the solid-liquid recovery tank (2) is vertically divided by a funnel (3), and the upper part thereof is formed in the circulation chamber (2a) and the lower part thereof is formed in the storage chamber (2b). Pumping pipe (4) between liquid source (5) and distribution chamber (2a)
And the flow chamber (2a) and the vacuum generator (1)
And a liquid collection tank (6) is interposed between the
a) and the liquid collection tank (6) are connected through a liquid pipe (7), and the suction port of the vacuum generator (1) and the liquid collection tank (6) are connected through a ventilation pipe (8). The solid-liquid separation screen (21) is formed in a free ring shape so that it can be slightly vibrated in the vertical direction by the support material (22) fixed above the discharge pipe inlet (4h) on the inner surface of the peripheral wall of the flow chamber (2a). When the vacuum generator (1) is activated, the storage chamber (2
b) The solid-liquid recovery tank (2) is equipped with a pressure conversion mechanism having a function of reducing the pressure in the flow chamber (2a) to the same pressure as that in the flow chamber (2a) and a function of raising the pressure to the same pressure as the atmospheric pressure. 3) The pressure in the flow chamber (2a) and the storage chamber (2
b) When the pressure in the storage chamber (2a) is kept open due to its own elasticity when the pressure in the storage chamber (2a) is negative and the pressure in the storage chamber (2b) is balanced with the atmospheric pressure. A first normally-open lip valve (15a), which is closed against its own elasticity, is provided, and the pressure in the storage chamber (2b) is provided at the lower bottom opening of the storage chamber (2b). When it is in equilibrium with the atmospheric pressure, it keeps its open state by its own elasticity, and
a) a second normally open lip valve (15b) which is closed against its own elasticity when a negative pressure is generated in the storage chamber (2b) together with (a). Collection device.