JPH0830353B2 - Vacuum type wastewater collection device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for adjusting a ratio (gas-liquid ratio) of an amount of intake sewage to an amount of intake air in a vacuum type sewage collector.

"Prior Art" FIG. 3 is a schematic diagram showing the entire vacuum type waste water collecting device. The vacuum pump 17 of the vacuum pumping station 10 sucks the air in the vacuum sewer pipe 4 collected in the water collecting tank 5 to keep the inside of the vacuum sewer pipe 4 in a depressurized state. The sewage discharged from each household 11 on the ground flows into the underground sewage masu 2 through the natural flow pipe 3 in the ground. When a certain amount of water is accumulated, the vacuum valve 1 opens and sewage is sucked from the vacuum valve suction pipe 12 and is sucked into the vacuum sewage pipe 4 laid underground through the vacuum valve 1 through the vacuum sewage pipe 13 buried in the ground. Subsequently, the air led from the atmosphere leading to the sewage tank 2 is sucked from the vacuum valve suction pipe 12, and is sucked into the vacuum sewer pipe 4 through the vacuum valve 1 and the vacuum sewage pipe 13. The air that has entered the vacuum sewage pipe 13 and the vacuum sewage pipe 4 expands and becomes a mixed-phase flow of sewage and air, and is collected in the water collection tank 5 of the vacuum pumping station 10. The air in the water collection tank 5 is discharged by the vacuum pump 17, and the water collection tank 5 is maintained at a constant vacuum degree. The sewage collected in the water collection tank 5 is sent to the sewage treatment plant by the pressure pump 6.

In the above description, the vacuum sewage pipe 13 guides a vacuum pressure and causes sewage to flow through the vacuum sewage pipe 4, so that it is substantially a branch pipe of the vacuum sewage pipe 4 and is a vacuum sewage pipe.

FIG. 4 is a vertical cross-sectional view showing devices on the sewage generation source side. The sewage of each household flows into the closed sewage tank 2 through the natural flow pipe 3. A vent pipe 14 communicates with the natural flow-down pipe 3, and the vent pipe 14 stands on the ground and opens to the atmosphere. A valve 7 is buried on the dirty water basin 2. A vacuum valve 1 and a vacuum valve controller 8 are included in the valve stem 7. The vacuum valve 1 normally shuts off between the vacuum valve suction pipe 12 and the vacuum dirty water pipe 13. Therefore, the vacuum wastewater pipe 13 is branched from the vacuum sewer pipe 4, but the vacuum pressure of the vacuum sewer pipe 4 is the vacuum valve suction pipe 12,
The dirty water is less than 2. The other end of the gas pressure introducing pipe 16 whose one end is connected to the upper end of the dirty water amount detecting pipe 15 is connected to the vacuum valve controller 8. The vent pipe 9 for the vacuum valve controller, which is installed on the ground with its upper end opened to the atmosphere and goes underground and is installed underground, branches into the vacuum valve 1 by branching in the valve valve. It is connected to the vacuum valve controller 8.

When dirty water flows into the dirty water tank 2, the lower opening of the dirty water amount detecting pipe 15 is closed by the dirty water. Then, as the sewage rises in the sewage tank 2, the sewage rises in the sewage amount detecting pipe 15 and presses the air in the sewage amount detecting pipe 15. The air pressure of the dirty water amount detecting pipe 15 is transmitted to the vacuum valve controller 8 through the gas pressure introducing pipe 16, and when the pressure exceeds a certain level, the vacuum valve controller 8 is operated, and the vacuum valve controller 8 causes the vacuum valve 1 to operate.
Open. Then, the sewage water introduced in the vent pipe 14 2
Sewage is sucked into the vacuum valve suction pipe 12 by the pressure difference between the atmospheric pressure inside and the vacuum pressure in the vacuum sewer pipe 4, passes through the open vacuum valve 1, passes through the vacuum waste water pipe 13, and is vacuumed. It flows into the water pipe 4.
When the surface of the sewage in the sewage tank 2 separates from the lower end of the vacuum valve suction pipe 12, the air sent from the vent pipe 14 causes the vacuum valve suction pipe 12, the opened vacuum valve 1 and the vacuum sewage pipe 13 to flow. As described above, the gas-liquid mixed-phase flow with the wastewater previously sent out through the vacuum sewer pipe 4 is sent to the vacuum pumping station 10.

Even if the sewage level of the sewage basin 2 drops and the air pressure in the sewage amount detection pipe 15 drops, the vacuum valve controller 8 does not immediately open the vacuum valve 1 and the liquefaction of sewage and air reaches a predetermined value. As described above, the vacuum valve 1 is configured to be closed after allowing air to pass through for a certain time with a delay.

The vacuum valve 1 described above is well known and is disclosed in, for example, U.S. Pat. No. 4,373,838.

Vacuum valve 1 and vacuum valve controller 8 in the above description
Is as shown in FIG. A pipe is connected between the vacuum waste water pipe 13 and the vacuum pressure inlet 33, and the vacuum pressure of the vacuum waste water pipe 13 is closed by a valve 42 at a distribution chamber 36, a pipe 34, and a flow rate adjusting valve.
The variable vacuum chamber 32 is connected to the variable vacuum chamber 32 through 44, and the constant vacuum chamber 37 is connected through the pipes 34 and 35. The variable vacuum chamber 33 and the constant vacuum chamber 37 are at equal pressure, and the compression coil spring 41 causes the diaphragm 38 to move.
The valve stem 39 with is at the leftmost end.

Air is guided from the controller ventilation pipe 9 to the atmosphere introduction hole 26 of the vacuum valve controller 8 and from the passage 27 to the cylinder chamber 1a of the vacuum valve 1 to press the piston 1b, and the piston 1b is compressed to the cylinder chamber 1a. The mushroom valve 28 connected to the piston 1b is pressed against the valve seat 1e by applying the force of the provided compression spring 1d to shut off between the vacuum valve suction pipe 12 and the vacuum wastewater pipe 13 where atmospheric pressure is introduced. There is.

When there is little dirty water in the dirty water tank 2, it is in the state of the above-mentioned figure. When sewage collects in the sewage masu 2, the pressure in the pressure detection chamber 20 rises corresponding to the depth of the sewage in the sewage masu 2 by the air guided from the gas pressure introducing pipe 16, and the protrusion 19 provided on the diaphragm 18
Is hinged to the body 21 and hinged by a compression spring 30
The compression spring 30 is contracted by pushing one end of the lever 23 which is biased counterclockwise around the center 22, and rotates clockwise around the hinge 22, and the valve 24 opens the valve opening 25.

When the valve port 25 is opened, the ventilation pipe 9, the air introduction hole 26, the passage
29, the atmospheric pressure chamber 31, the valve port 25 and the air flow into the variable vacuum chamber 32. Then, a differential pressure is generated between the variable vacuum chamber 32 and the constant vacuum chamber 37 through which the vacuum pressure is introduced from the vacuum dirty water pipe 13 through the vacuum pressure inlet 33, the distribution chamber 36, and the pipes 34, 35. , The diaphragm 38 is displaced to the right, and the diaphragm 38
The valve rod 39 connected to the valve rod is moved rightward against the compression coil spring 41, and the valve 42 shuts off the atmosphere introducing hole 26 and the passage 27,
Since 43 is opened, vacuum wastewater pipe 13, vacuum pressure inlet 33, distribution chamber
Vacuum pressure is transmitted to 36, valve port 43, passage 27, cylinder chamber 1a,
The piston 1b is pulled up against the force of the compression spring 1d, and the mushroom valve 28 is opened.

When the detection pressure introduced from the gas pressure introducing pipe 16 decreases, the pressure in the pressure detection chamber 20 decreases, the diaphragm 18 moves left due to the pressure difference between the atmospheric pressure chamber 31 and the pressure detection chamber 20, and the lever 23 moves to the spring 30. The valve 24 restored by force closes the valve opening 25. As a result, the air in the variable vacuum chamber 32 is sucked into the vacuum dirty water pipe 13 through the pipe 34, the distribution chamber 36, and the vacuum pressure inlet 33 via the flow rate adjusting valve 44.
The diaphragm 38 is restored, the valve rod 39 is also restored by the force of the spring 41, the valve 42 closes the valve opening 43, and the atmosphere is the atmosphere introduction hole 26,
The vacuum pressure, which flows into the cylinder chamber 1a through the passage 27 and pulls up the piston 1b, disappears, and the force of the compression spring 1d causes the saw valve 28 to close.

Therefore, if the opening degree of the flow rate adjusting valve 44 is adjusted, the variable vacuum chamber 32
The outflow time of the air is adjusted, and the time when the mushroom valve 28 is closed after the wastewater in the wastewater tank 2 leaves the wastewater amount detection pipe 15 is adjusted, and the wastewater and air passing through the vacuum valve 1 are adjusted. The liquid ratio can be adjusted.

[Problems to be Solved by the Invention] In the use of the vacuum valve controller 8 according to the invention disclosed in the above-mentioned U.S. Pat. No. 4,373,838, the adjustment of the gas-liquid ratio requires that the amount of sewage sucked by the vacuum valve 1 be uniform every time. About 40
Flow rate adjusting valve in controller 8 fixed at liter / time
It was done by controlling the time until the vacuum valve 1 once opened at 44 was closed. That is, when the vacuum valve 1 is opened, it first sucks the dirty water, and even after the sucking is finished, the vacuum valve 1 is opened for a while and the atmosphere is sucked in the meantime. The time becomes longer and the gas-liquid ratio becomes larger. On the contrary, if the time during which the vacuum valve 1 is open is shortened, the remaining time for sucking air is shortened and the gas-liquid ratio is reduced. In the conventional method using the flow rate adjusting valve 44 in the vacuum valve controller 8, adjustment is delicate because the moving amount of a small amount of control air is adjusted, and the gas-liquid ratio can be stably kept to 2 or 3 or less. could not.

It is an object of the present invention to provide a vacuum sewage collection device equipped with a vacuum valve device that improves the above points and has a large gas-liquid ratio adjustment range.

[Means for Solving the Problem] In order to achieve this object, the conventional vacuum valve was operated to uniformly suck about 40 liters of sewage and sucked sewage. Adjust the gas-liquid ratio by changing the amount of waste water that the vacuum valve operates with. Once the vacuum valve is opened, it continues to open for almost a fixed time, but by adjusting the amount of sewage to be sucked in, the ratio of the time for sucking sewage to the remaining time for sucking air within the fixed time when the valve is open can be changed. Adjust the gas-liquid ratio with. That is, conventionally, the amount of sewage was fixed and the time when the vacuum valve was opened was changed to adjust the gas-liquid ratio.However, in the present invention, conversely, the time when the vacuum valve is opened is fixed and the amount of sewage is changed. Then, the gas-liquid ratio is adjusted.

(1) Make the volume of the sewage amount detection tube variable.

For example, if the length of the sewage amount detection pipe is made variable, the volume inside the sewage amount detection pipe will increase when the sewage amount detection pipe is lengthened, so that the pressure in the sewage amount detection pipe reaches the pressure for operating the vacuum valve. The end of the pipe must be deeply submerged in the dirty water. This increases the amount of dirty water when the vacuum valve operates. On the contrary, if the sewage amount detection pipe is shortened, the amount of sewage when the vacuum valve operates will decrease.

(2) Alternatively, in the case of the same volume of sewage amount detection pipe, the level difference between the end of the vacuum valve suction pipe and the end of the sewage amount detection pipe in the wastewater tank is made variable.

If the pipe end of the sewage amount detection pipe is made much higher than the pipe end of the vacuum valve suction pipe, the amount of dirty water when the vacuum valve operates increases, and conversely the pipe end of the sewage amount detection pipe is If it is lowered to a level, the amount of dirty water when the vacuum valve operates will be reduced.

The present invention is a vacuum valve suction pipe with one end opened in the lower part of the dirty water, a vacuum valve interposed between the vacuum valve suction pipe and the vacuum sewer pipe, a vacuum valve controller for controlling the opening and closing of the vacuum valve,
The sewage amount detection pipe that detects the sewage amount signal to be sent to the vacuum valve controller, the gas pressure introduction pipe that connects the sewage amount detection pipe and the vacuum valve controller, and the sewage collection area. A vacuum type sewage collection device equipped with a vacuum sewage pipe to be sucked, equipped with a sewage amount detection pipe in which the volume or the difference between the opening of the vacuum valve suction pipe to the sewage masu and its lower end is variable. It is a vacuum type sewage collection device characterized in that.

[Examples] Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view of a vacuum valve device. In the figure, only the reference numerals are given to the corresponding portions to those of the conventional example, and the description thereof will be omitted.

The sewage amount detection pipe, which is indicated by reference numeral 15 in its entirety, has a sewage drainage lid 51
The cylindrical sleeve 52 is fixedly attached to the
A circumferential groove is provided on the inner periphery of both ends of 52, an upper rubber ring 53 and a lower rubber ring 54 are accommodated therein, and an upper movable pipe whose upper end is closed at the upper part of the sleeve 52 via the upper rubber ring 53. 55 is inserted, the movable tube 55 is vertically adjustable against the frictional force with the upper rubber ring 53, and is held by the frictional force.
A fixed tube 56, which is thinner than the movable tube 55, is inserted in the lower part of the lower tube via a lower rubber ring 54, and the fixed tube 56 is held by the frictional force between the lower rubber ring 54 and the fixed tube 56.

The gas pressure introducing pipe 16 is a flexible pipe and allows the upper movable pipe 55 to move up and down.

If you adjust the position of the upper movable tube 55 up and down,
The distance L between the upper end of 55 and the lower end tube of the fixed tube 56 changes.

Now, when increasing the gas-liquid ratio, lowering the upper movable pipe 55 reduces the distance L between the upper end of the upper movable pipe 55 and the lower end of the fixed pipe 56. Therefore, the volume in the wastewater amount detection pipe 15 decreases. In this state, the inflow of sewage from the natural flow-down pipe 3 raises the sewage surface 57 in the sewage tank 2, and the sewage surface 57 is fixed by the fixed pipe 56.
When reaching the lower end of the pipe, the wastewater amount detection pipe 15 is closed. Then, as the sewage surface 57 rises, the air in the sewage amount detection pipe 15 is compressed. Since the volume inside the wastewater amount detection pipe 15 is decreasing, the position of the wastewater surface 57 which reaches the air pressure required to open the valve 24 of the vacuum valve controller 8 becomes lower than before. Therefore, the vacuum valve 1 is opened by the operation of the vacuum valve controller 8, and the amount of dirty water sucked from the dirty water tank 2 is reduced.
The opening time of the vacuum valve 1 is such that the flow rate of air discharged through the flow rate adjusting valve 44 is small, and the vacuum valve 1 is opened for a substantially constant time due to the flow rate. Therefore, the gas-liquid ratio increases.

When the gas-liquid ratio is reduced, if the upper movable pipe 55 is raised, the distance L between the upper end of the upper movable pipe 55 and the lower end of the fixed pipe 56 increases. This increases the volume of the wastewater amount detection pipe 15. In this state, the sewage surface 57 in the sewage tank 2 rises due to the inflow of sewage from the natural flow-down pipe 3, and when the sewage surface reaches the lower end of the fixed pipe 56, the sewage amount detection pipe 15 is closed. Then, after that, the air in the wastewater amount detection pipe 15 is compressed due to the rise of the wastewater surface 57. Since the volume of the sewage amount detection pipe 15 is increasing, the position of the sewage surface 57 reaching the air pressure required to open the valve 24 of the vacuum valve controller is higher than before.
Therefore, the vacuum valve 1 is opened by the operation of the vacuum valve controller 8, and the amount of dirty water sucked from the dirty water tank 2 increases. Therefore, the gas-liquid ratio decreases.

FIG. 2 is a vertical sectional view of another embodiment. In this embodiment, a sleeve 52 is fixed to a dirty water lid 51. The upper and lower rubber rings are provided on the inner circumference of the sleeve 52 as in the previous embodiment.
53, 54 are housed, and the wastewater amount detection pipe 15 is inserted into the sleeve 52 via the rubber rings 53, 54. The dirty water amount detecting pipe 15 can move up and down against the frictional force between the upper and lower rubber rings 53, 54, and the frictional force prevents falling.

When the dirty water amount detecting pipe 15 is moved up and down against the frictional force of the upper and lower rubber rings 53 and 54, the height difference M between the lower end of the dirty water amount detecting pipe 15 and the lower end of the vacuum valve suction pipe 12 changes.

When increasing the gas-liquid ratio, the wastewater amount detection pipe 15 is lowered to reduce the difference M. When the sewage surface 57 of the sewage flowing into the sewage masu 2 from the natural flow pipe 3 reaches the lower end of the sewage amount detection pipe 15, the air in the sewage amount detection pipe 15 begins to be compressed, and the sewage amount is detected as the sewage surface 57 rises. The sewage surface in the pipe 15 also rises, and the air pressure in the sewage amount detection pipe 15 rises. When the pressure for opening the valve 24 of the vacuum valve controller 8 is reached, the vacuum valve 1 is opened, and the dirty water is sucked into the dirty water 2 from the vacuum valve suction pipe 12. Since the internal volume of the dirty water amount detecting pipe 15 is constant, the air pressure for operating the vacuum valve controller 8 is obtained when the dirty water rises from the lower end of the dirty water amount detecting pipe 15 to a certain position. Therefore, the amount of dirty water sucked from the vacuum valve suction pipe 12 is reduced by lowering the M. Since the opening time of the vacuum valve 1 is almost constant, the gas-liquid ratio increases.

When the sewage amount detection pipe 15 is pulled up, the lower end of the sewage amount detection pipe 15 expands by increasing the difference M between the sewage amount detection pipe 15 and the lower end of the vacuum valve suction pipe 12, and the sewage amount in the sewage amount detection pipe 15 for operating the vacuum valve controller 8 is increased. The surface rises and the corresponding wastewater surface 57 of the wastewater tank 2 rises, so that the opening of the vacuum valve 1 increases the amount of wastewater sucked from the vacuum valve suction pipe 12. Since the opening time of the vacuum valve 1 is almost constant, the gas-liquid ratio decreases.

In the first embodiment, if the lower fixed pipe 56 can be held in a fixed position so as to be movable up and down, the wastewater amount detection pipe 15
It is possible to adjust both the volume and the lower end position of the.

The valve 24 of the vacuum valve controller 8 opens when the air pressure in the wastewater amount detection pipe 15 becomes a constant pressure. If the volume of the wastewater amount detection pipe 15 is constant, the wastewater surface 57 changes by the same amount as the vertical movement amount of the wastewater amount detection pipe 15 of the second embodiment. Therefore,
Since the vacuum valve 1 is opened and the amount of dirty water sucked in by one operation can be adjusted accurately, the gas-liquid ratio is adjusted accurately.

If the lower end of the wastewater amount detection pipe 15 is at a fixed position and the volume of the wastewater amount detection pipe 15 is variable as in the first embodiment, the upper movable pipe
55 The height of the sewage surface rising in the sewage amount detection pipe 15 with respect to the length L from the upper end to the lower end of the lower fixed pipe 56 can be calculated.

If the upper movable pipe 55 is made thick and short, the change in the amount of dirty water in one opening of the vacuum valve 1 can be increased. In this embodiment, the upper movable pipe 55 is provided with a scale, for example, and by reading the amount of movement, the vacuum valve 1 can be opened and the amount of sewage sucked in can be accurately adjusted in one operation, so that the gas-liquid ratio can be adjusted. Is done exactly.

〔The invention's effect〕

According to the present invention, since the volume of the wastewater amount detection pipe or the lower end position of the wastewater amount detection pipe can be adjusted, the gas-liquid ratio can be stably and accurately set.

[Brief description of drawings]

1 and 2 are vertical cross-sectional views of an embodiment of the present invention, FIG. 3 is a perspective view of a vacuum type waste water collecting device, FIG. 4 is a vertical cross-sectional view of a device provided in a sewage generation area, and FIG. It is a longitudinal cross-sectional view of the vacuum valve controller of the vacuum valve device. 1 ... Vacuum valve, 1a ... Trinda chamber, 1b ... Piston, 1d
...... Compression spring, 1e …… Valve seat, 2 …… Sewage, 3 …… Natural downflow pipe, 4 …… Vacuum sewage pipe, 5 …… Water collection tank, 6 ...
… Pressure pump, 7 …… Valve, 8 …… Vacuum valve controller, 9 …… Ventilation pipe, 10 …… Vacuum pump station, 11 …… Various households, 12 …… Vacuum valve suction pipe, 13 …… Vacuum sewage pipe , 14 …… Vent pipe, 15 …… Sewage amount detection pipe, 16 …… Gas pressure introduction pipe, 17
…… Vacuum pump, 18 …… Diaphragm, 19 …… Protrusion, 20
...... Pressure detection chamber, 21 ...... Main body, 22 ...... Hinge, 23 ...... Lever, 24 ...... Valve, 25 ...... Valve port, 26 ...... Atmosphere introduction hole, 27 ...
... passage, 28 ... mushroom valve, 29 ... passage, 30 ... compression spring, 31 ... atmospheric pressure chamber, 32 ... variable vacuum chamber, 13 ... vacuum pressure inlet, 34, 35 ... piping, 36 ... … Distribution chamber, 37 …… Constant vacuum chamber, 38 …… Diaphragm, 39 …… Valve rod, 41 …… Compression coil spring, 42 …… Valve, 43 …… Valve port, 44 …… Flow rate adjusting valve, 51
…… Sewage water lid, 52 …… Sleeve, 53 …… Upper rubber ring, 54 …… Lower rubber ring, 55 …… Upper movable tube, 56…
… Fixed tube, 57 …… Sewage surface.

Claims (1)

[Claims] 1. A vacuum valve suction pipe having one end opened in the lower part of the sewage mist, a vacuum valve interposed between the vacuum valve suction pipe and the vacuum sewer pipe, and a vacuum valve controller for controlling opening and closing of the vacuum valve. , A sewage amount detection pipe for detecting a sewage amount signal to be sent to the vacuum valve controller, a gas pressure introduction pipe connecting the sewage amount detection pipe and the vacuum valve controller, and disposed in the sewage collection area,
In a vacuum-type sewage collector equipped with a vacuum sewer pipe sucked by a vacuum pump at a vacuum pumping station, the volume or the difference between the opening of the vacuum valve suction pipe to the sewage masu and its lower end is variable. A vacuum type sewage collection device comprising a sewage amount detection pipe.