JP4282149B2 - Suction drainage device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a suction drainage device that sucks out water that has entered an existing pipe line such as a gas pipe and separates earth and sand and then drains it.
[0002]
[Problems to be solved by the invention]
In general, pipes such as gas pipes and water pipes buried in the ground, communication pipes through which communication cables are inserted, and power pipes through which power transmission cables are inserted, have a long laying period. In some cases, a defect portion such as a leak hole is generated in the pipeline due to deterioration over time, and rainwater or groundwater may enter the pipeline from the defect portion.
In addition, when a pipeline breaks due to a disaster such as an earthquake or flood, muddy water may enter the pipeline.
[0003]
The water that has entered the existing pipeline is drained by suction from the open end of the pipeline with a suction device after the pipeline has been repaired. For this reason, since it cannot flow directly into a drain, etc., conventionally, the sucked water is collected in a drainage tank that separates it from earth and sand, and then drained after separation by sedimentation of earth and sand. .
By the way, in the case of the conventional drainage tank, when the drainage port is opened during the suction operation, the drainage tank has a negative pressure, and whether or not water is discharged is determined by the relationship between the negative pressure and the water level. . For this reason, there are many cases where the water is not drained at the actual site, and conversely, air flows into the tank from the drain port and there is a problem that the suction efficiency is lowered.
In addition, when the drainage tank is full, the work of sucking water from the pipeline is temporarily suspended, the water from which the sediment has been separated is drained, and then the suction work is resumed. It was necessary to improve work efficiency.
[0004]
This invention is made in order to solve the conventional problem at the time of sucking and draining the water that has entered the existing pipeline as described above.
That is, an object of the present invention is to provide a suction and drainage device that can continuously perform a suction operation of water from an existing pipe line, and thereby can improve the work efficiency.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a suction drainage apparatus according to a first invention divides a main body casing constituting a water tank, and the main body casing into two water tanks, a suction tank and a water receiving tank, and the floor of the main body casing. A partition member for forming the water receiving tank under the low floor part and the high floor part, comprising a low floor part near the part, a high floor part near the ceiling part of the main body casing, and a vertical wall formed therebetween , wherein it is said in the suction tank is installed on the lower floor portion, and a sediment receiving member by overflowing water separating the sediment in the suction tank, with communicates with the provided above the main body casing said suction chamber a drain suction port located above the soil receiving member, wherein provided above the body casing communicates with said suction chamber, an air intake air in the main body casing is sucked out of the body casing Mouth and the air communication port communicated with said body in said provided above the casing receiving tank, a water outlet which communicates with the body said water tank is provided in the lower portion of the casing, said partition member distribution and first check valve that allows only the flow of liquid from said suction chamber mounted to the vertical wall to the water tank, from the attached to the drainage port receiving tank of the liquid to the outside of the main body casing air and a second check valve, the first position and the receiving tank which communicates the receiving tank to the suction tank while interrupting the communication between the water tank and the atmosphere is mounted on the atmosphere communication port for allowing only It is characterized in that it comprises a and a switching valve that is switched between a second position to block the communication state of the suction tank and the receiving tank with communicating to.
[0006]
The suction drainage device according to the first aspect of the present invention is installed near the opening end of a pipe line for sucking water, the drainage suction port is connected to the opening end of the pipe line, and the air suction port is connected to the vacuum pump. When the vacuum pump is driven in the connected state, the air in the main body casing is sucked through the air suction port.
At the start of this suction, the switching valve attached to the atmosphere communication port is switched to the first position so that the suction tank and the water receiving tank communicate with each other and the water receiving tank and the atmosphere are disconnected.
[0007]
As a result, the suction tank and the water receiving tank are negatively pressured by the suction by the vacuum pump, and the water in the pipe is sucked into the suction tank, and the soil receiving member installed in the suction tank from the drain suction port Fall into.
The sucked water is collected in the suction tank after the mixed earth and sand are separated by the earth and sand receiving member, and further passes through the first check valve attached to the partition member to enter the water receiving tank. Flow into.
At this time, since the inside of the water receiving tank communicating with the suction tank is negative due to the suction by the vacuum pump, the second check valve is closed and the drainage from the drain outlet is prevented. The water level in the tank rises.
[0008]
In this way, when the water level in the water receiving tank rises and reaches a predetermined water level, the switching valve is switched from the first position to the second position to cut off the communication between the suction tank and the water receiving tank, and the water receiving tank. To communicate with the atmosphere.
As a result, since the inside of the water receiving tank is at atmospheric pressure while the suction tank is maintained at a negative pressure, the first check valve is closed to block outflow of water from the suction tank to the water receiving tank. 2 The check valve is opened and the water accumulated in the water receiving tank is discharged to the outside through the drain port.
[0009]
Thus, after the water sucked from the pipe line and separated from the earth and sand is discharged to the outside from the suction discharge device, the suction valve and the water receiving tank are communicated by switching the switching valve to the first position again. The communication between the water receiving tank and the atmosphere is blocked.
Then, since the suction tank and the water receiving tank have the same pressure, the first check valve opens due to the water pressure accumulated in the suction tank while draining from the water receiving tank, and the suction tank Water flows into the water receiving tank and accumulates in the water receiving tank.
[0010]
In this way, by repeating the above-described steps, the water is continuously sucked from the pipe line.
As described above, according to the first aspect of the present invention, it is possible to continuously perform the operation of sucking water from the existing pipe line without interruption, thereby improving work efficiency.
[0011]
In order to achieve the above object, the suction drainage device according to the second invention is provided in the water receiving tank and the liquid accumulated in the water receiving tank rises to a predetermined water level in addition to the structure of the first invention. It is further characterized by further comprising a water level detection member that detects this and switches the switching valve according to the presence or absence of this detection.
[0012]
In the suction and drainage device according to the second aspect of the present invention, the switching between the first position and the second position of the switching valve is automatically performed depending on whether or not the water level is detected by the water level detecting member that detects the water level in the water receiving tank. Done.
[0013]
That is, when the water level detection member does not detect that the water level in the water receiving tank has reached the predetermined water level, the switching valve is maintained at the first position, and the water level in the water receiving tank has reached the predetermined water level. Is detected, the switching valve is automatically switched from the first position to the second position.
When the water level in the water receiving tank drops and is no longer detected by the water level detection member, the switching valve is automatically switched from the second position to the first position again.
As described above, according to the second aspect, it is not necessary for the operator to monitor the water level in the water receiving tank, and work efficiency can be further improved.
[0015]
In order to achieve the above object, a suction drainage device according to a third invention is characterized in that, in addition to the configuration of the first invention, a pressure gauge and a pressure adjusting member are attached to the air suction port.
[0016]
According to the suction and drainage device of the third aspect of the invention, when the air in the main body casing is sucked by the vacuum pump connected to the air suction port, the pressure adjusting member is operated based on the suction pressure indicated by the pressure gauge. Thereby, the suction pressure of the air from the inside of the main body casing can be adjusted to an arbitrary pressure.
[0017]
In order to achieve the above object, a suction drainage device according to a fourth invention is characterized in that, in addition to the configuration of the first invention, a shielding member for preventing suction of gas other than gas is attached to the air suction port. It is said.
[0018]
According to the suction and drainage device of the fourth aspect of the present invention, it is possible to prevent the water sucked into the main body casing or the earth and sand mixed in the water from being sucked into the vacuum pump from the air suction port.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments that are considered to be most suitable for the present invention will be described in detail below with reference to the drawings.
FIG. 1 is a cross-sectional view showing an example of an embodiment of a suction drainage device according to the present invention.
[0020]
In FIG. 1, a partition floor 2 is attached in a main body casing 1 having a cylindrical cross section and hermetically sealed, and the interior of the main body casing 1 is formed by the partition floor 2 into a suction tank 1A and a water receiving tank 1B. It is divided into.
The partition floor 2 is formed in two stages, a low floor portion 2A close to the floor portion of the main casing 1 and a high floor portion 2B close to the ceiling portion. The partition floor 2 is formed above the low floor portion 2A. The earth-and-sand receiving tank 3 constituted by a pail can opened at the top is mounted in the recess.
A pressure gauge 6 and an air suction port 4 connected to a vacuum pump (not shown) are attached to the ceiling portion of the main body casing 1, and the pressure gauge 6 is attached to the air suction port 4 via a pressure adjustment valve 5. .
A jammer plate 4 </ b> A is attached to the inner opening of the main body casing 1 of the air suction port 4 to prevent the suction of earth and sand and water.
On the outer peripheral wall of the main casing 1, an elbow-type drainage suction port 7 connected to a conduit for sucking water is attached at a position located above the earth and sand receiving tank 3. 7 extends into the suction tank 1 </ b> A of the main body casing 1, and a discharge port 7 </ b> A extending downward is opposed to the upper end opening of the earth and sand receiving tank 3.
[0022]
A drainage port 8 communicated with the water receiving tank 1B is attached to the lower outer peripheral wall of the main body casing 1, and an air communication port 9 communicated with the water receiving tank 1B is attached to the upper outer peripheral wall.
The atmosphere communication port 9 has an elbow shape in which a portion located outside the main body casing 1 is directed downward, and a wire mesh (not shown) is attached to an opening end of the atmosphere communication port 9 to prevent the clothing from being sucked.
[0023]
The vertical wall 2C of the partition floor 2 that partitions the main body casing 1 into a suction tank 1A and a water receiving tank 1B allows water to flow from the suction tank 1A to the water receiving tank 1B, but from the water receiving tank 1B to the suction tank 1A side. A check valve V1 for shutting off the flow is attached.
The mounting position of the check valve V1 is set at a position close to the low floor portion 2A of the partition floor 2 lower than the upper end opening of the earth and sand receiving tank 3.
The drain port 8 has a check valve V2 that allows water to flow from the inside of the water receiving tank 1B to the outside of the main casing 1 but blocks the flow from the outside of the main casing 1 to the direction of the water receiving tank 1B. It is attached.
[0024]
An automatic switching three-way valve V3 is attached to the atmosphere communication port 9, and this three-way valve V3 is connected to a water level detection float 10 installed in the water receiving tank 1B. The three-way valve V3 communicates the suction tank 1A and the water receiving tank 1B with each other depending on whether or not the water level in the water receiving tank 1B is detected by the water level detection float 10, and first blocks the communication between the water receiving tank 1B and the atmosphere. The position can be switched between the second position where the suction tank 1A and the water receiving tank 1B are disconnected from each other and the water receiving tank 1B is communicated with the atmosphere.
That is, the three-way valve V3 is maintained at the first position when the water level in the water receiving tank 1B has not reached the position of the water level detecting float 10, and the water level in the water receiving tank 1B has reached the position of the water level detecting float 10. Sometimes it can be switched to the second position.
The switching of the three-way valve V3 may be mechanically performed by a traction force of a wire connected to the water level detection float 10, or may be electrically generated by a signal indicating the presence or absence of the water level detected by the water level detection float 10. May be switched automatically.
[0025]
Next, the operation of the suction drainage device will be described.
This suction / drainage device is installed near the opening end of a pipe line for sucking water, and a drainage suction port 7 is connected to the opening end of the pipe line via a hose (not shown). It is connected to a vacuum pump (not shown).
Then, the air in the main body casing 1 is sucked through the air suction port 4 by driving the vacuum pump.
[0026]
At this time, by operating the pressure adjustment valve 5 while looking at the pressure gauge 6, the suction pressure of air from the inside of the main body casing 1 can be adjusted to an arbitrary pressure.
At the start of this suction, since water does not accumulate in the water receiving tank 1B in the main casing 1, the three-way valve V3 attached to the air communication port 9 is maintained at the first position, and the suction tank 1A The water receiving tank 1B is communicated, and communication between the water receiving tank 1B and the atmosphere is blocked.
As a result, the suction tank 1A and the water receiving tank 1B become negative pressure due to suction by the vacuum pump, and the feed water in the pipe is sucked into the suction tank 1A and installed in the suction tank 1A from the drain suction port 7. It falls into the earth and sand receiving tank 3.
[0027]
The earth and sand mixed in the sucked water is deposited on the bottom of the earth and sand receiving tank 3, and only the water from which the earth and sand has been separated overflows from the earth and sand receiving tank 3 into the suction tank 1A.
Further, the water accumulated in the suction tank 1A flows into the water receiving tank 1B through the check valve V1.
At this time, since the pressure in the water receiving tank 1B is negative due to suction by the vacuum pump, the check valve V2 is closed and the drainage from the drain port 8 is prevented, so that the water level in the water receiving tank 1B rises. I will do it.
Thus, when the water level in the water receiving tank 1B rises and the water level reaches the position of the water level detection float 10, the three-way valve V3 is moved from the first position to the second position by the detection of the water level by the water level detection float 10. Switching to the position cuts off the communication between the suction tank 1A and the water receiving tank 1B, and the water receiving tank 1B communicates with the atmosphere.
As a result, the negative pressure in the suction tank 1A is maintained and the pressure in the water receiving tank 1B becomes atmospheric pressure. Therefore, the check valve V1 is closed and the outflow of water from the suction tank 1A to the water receiving tank 1B is blocked. At the same time, the check valve V2 is opened, and the water accumulated in the water receiving tank 1B is discharged to the outside from the drain port 8.
[0028]
Thus, after the water sucked from the pipe line and separated from the earth and sand is discharged from the suction drainage device to the outside, the water level in the water receiving tank 1B is lowered from the position of the water level detection float 10 in three directions. The valve V3 is switched again to the first position, and the suction tank 1A and the water receiving tank 1B are communicated with each other, and the communication between the water receiving tank 1B and the atmosphere is blocked.
And since the inside of the suction tank 1A and the inside of the water receiving tank 1B become the same pressure, the check valve V1 is opened by the water pressure of the water accumulated in the suction tank 1A while draining from the inside of the water receiving tank 1B. Then, water flows from the suction tank 1A into the water receiving tank 1B, and the above-described steps are repeated.
As described above, the suction of the water from the pipe line is continuously performed.
[0029]
FIG. 2 is a sectional view showing another example of the embodiment of the suction and drainage device according to the present invention.
The suction / drainage device in this example automatically switches the three-way valve attached to the air communication port while the suction / drainage device in the example of FIG. 1 automatically switches the three-way valve. It is something like that.
That is, the suction / drainage device of FIG. 2 is attached to the outer peripheral wall of the main casing 1 and attached to the outer peripheral wall of the main casing 1 to the elbow-type atmospheric communication port 19 that is attached to the outer peripheral wall of the main casing 1 and communicates with the water receiving tank 1B. A connection port 20 communicated with the inside of 1A is connected, and a manual switching three-way valve V13 is attached to a connecting portion between the atmosphere communication port 19 and the connection port 20.
This three-way valve V13 blocks the communication between the suction tank 1A and the water receiving tank 1B, and the first position where the suction tank 1A and the water receiving tank 1B communicate with each other and blocks the communication between the water receiving tank 1B and the atmosphere. It is possible to switch between the second position where 1B communicates with the atmosphere.
About the structure of another part, it is the same as that of the suction drainage apparatus of FIG. 1, and the same code | symbol is attached | subjected.
[0030]
This suction / drainage device, like the suction / drainage device of FIG. 1, sucks water from the inside of the pipe connected to the drainage suction port 7 by suction by a vacuum pump connected to the air suction port 4. The earth and sand sucked together with water by the receiving tank 3 is separated.
And when the three-way valve V13 is in the first position, the water separated from the earth and sand is accumulated in the suction tank 1A and the water receiving tank 1B, and the water level in the water receiving tank 1B rises to a predetermined position. The operator switches the check valve V13 to the second position and drains water from the water receiving tank 1B.
After draining from the water receiving tank 1B, the operator returns the three-way valve V13 to the first position and repeats water injection into the water receiving tank 1B.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing an example of an embodiment of the present invention.
FIG. 2 is a side sectional view showing another example of the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Main body casing 1A ... Suction tank 1B ... Receiving tank 2 ... Partition floor (partition member)
2A ... Low floor part 2B ... High floor part 2C ... Vertical wall 3 ... Sediment receiving tank (sediment receiving member)
4 ... Air suction port 4A ... Jama plate (shielding member)
5 ... Pressure adjustment (pressure adjustment member)
6 ... Pressure gauge 7 ... Drainage suction port 8 ... Drainage port 9, 19 ... Air communication port V1 ... Check valve (first check valve)
V2 ... Check valve (second check valve)
V3, V13 ... Three-way valve (switching valve)

Claims (4)

A body casing;
The main body casing is divided into two water tanks, a suction tank and a water receiving tank, and a low floor portion near the floor portion of the main body casing, a high floor portion near the ceiling portion of the main body casing, and a vertical wall formed therebetween. A partition member for forming the water receiving tank under the low floor portion and the high floor portion ,
An earth and sand receiving member installed on the low floor portion in the suction tank and causing the water separated from the sediment to overflow into the suction tank ;
A drain suction port located above the sediment receiving member with communicates with the suction chamber provided in the upper portion of the main body casing,
It said communicating with the provided above the main body casing the suction tank, and an air suction port air in the main body casing is sucked out of the body casing,
And the air communication port communicated with the said water tank is provided at an upper portion of the main body casing,
A drain outlet which communicates into the water tank provided in the lower portion of the main body casing,
A first check valve that allows only the flow of liquid from the suction chamber is attached to the vertical wall of the partition member to said water tank,
A second check valve that allows only the flow of liquid to the outside of the main body casing from the water tank attached to the water outlet,
It said suction chamber and said water tank with communicating the first position and the receiving tank which communicates the receiving tank to the suction tank to atmosphere while blocking the communication between the water tank and the atmosphere is mounted on the atmosphere communication port A switching valve that is switched between a second position that blocks the communication state of
A suction drainage device characterized by comprising:   2. A water level detection member provided in the water receiving tank for detecting that the liquid accumulated in the water receiving tank has risen to a predetermined water level and switching the switching valve according to the presence or absence of the detection. The suction drainage device described in 1.   The suction drainage device according to claim 1, wherein a pressure gauge and a pressure adjusting member are attached to the air suction port.   The suction drainage device according to claim 1, wherein a shielding member that prevents suction of gas other than gas is attached to the air suction port.

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