JPH07310853A - Vacuum valve controller - Google Patents

Abstract

PURPOSE:To suck sludge, exceeding a high water level, through a suction pipe and to prevent inflow of sludge to a suction port by a method wherein a forced opening device is installed in a sludge inlet and when a water level in the sludge inlet is raised to a high water level, an atmospheric pressure is introduced in a variable vacuum chamber to release a vacuum valve. CONSTITUTION:In a sludge inlet S, sludge is at an ordinary low water level but when the water level is raised to a high water level owing to a failure in operation of a control device 5, the float 36 of a forced opening device 32 is raised and meanwhile, a float valve 37 is lowered to release an atmosphere introduction small valve port 34. As a result, an atmospheric pressure in a container 33 is introduced to a variable vacuum chamber 10 through the atmosphere introduction small valve port 34 and a pressure in the variable vacuum chamber 10 is applied and a main diaphragm 11 is displaced to the constant vacuum chamber 12 side. A valve rod 24 is pressed against the energizing force of a coil spring 26 and a valve 25 is releases a large valve port 15. Meanwhile, an atmosphere introduction port 17 positioned facing the large valve port is closed. Further, a vacuum pressure in a vacuum sludge pipe 2 is introduced through the large valve port 15 to a rear chamber 1f and the vacuum valve 1 is released, and sludge is sucked through a suction pipe 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a controller for a vacuum valve used in a sewer line using a vacuum type waste water collecting system.

[0002]

2. Description of the Related Art As a conventional vacuum type waste water collecting system, there is, for example, one described in Japanese Patent Laid-Open No. 2-292426, and a vacuum valve control device in a vacuum sewer line is as shown in FIG. Met. In FIG. 3, the vacuum valve 1 has one end communicating with the vacuum waste water pipe 2 and the other end communicating with the vacuum valve suction pipe 3. The vacuum sewage pipe 2 communicates with a vacuum source (not shown) of a vacuum pumping station, and the vacuum valve suction pipe 3 communicates with a sewage basin where the natural flow-down pipes of each household gather. Vacuum valve 1
The valve element 4 disposed inside the valve is movable back and forth between a closed state in which it is pressed against the valve seat 1b in the valve box 1a and an open state in which it is separated from the valve seat 1b. Inside the cylinder chamber 1c formed in the upper part of the valve box 1a, a piston 1d connected to the valve body 4 is arranged, and a spring 1e for urging the valve body 4 in the closing direction is provided on the back surface of the piston 1d. There is.

The control device 5 for the vacuum valve 1 includes a pressure detection chamber 6
, An atmospheric pressure chamber 8 adjacent to the pressure detection chamber 6 via a sub-diaphragm 7, a variable vacuum chamber 10 communicating with the atmospheric pressure chamber 8 through a small valve port 9, and a variable vacuum chamber 10 connected to the main diaphragm 1
1 adjacent to the constant vacuum chamber 12, a distribution chamber 14 adjacent to the constant vacuum chamber 12 via a partition wall 13, a passage 16 communicating with the distribution chamber 14 via the large valve port 15, and a passage 16 communicating with the passage 16. In addition, the pressure detection chamber 6 is provided with an air introduction hole 17 that opens to face the large valve opening 15 and the gas pressure introduction pipe 18 is provided.
Through to the water level detecting pipe 18a of the sewage basin S, and the atmosphere introducing hole 17 is open to the atmosphere through a ventilation pipe 19.

The atmospheric pressure chamber 8 communicates with the atmosphere introducing hole 17 through a ventilation path 20, and the distribution chamber 14 communicates with the constant vacuum chamber 12 and the variable vacuum chamber 10 through a pipe 21. A flow rate adjusting valve 22 is provided in the middle of a pipe 21 communicating with the variable vacuum chamber 10. The variable vacuum chamber 10 is provided with a valve device 23 that opens and closes the small valve opening 9 in conjunction with the sub diaphragm 7. A valve rod 24, which is arranged so as to pass through a partition wall 13 that separates the constant vacuum chamber 12 and the distribution chamber 14 in a retractable manner, connects one end to the main diaphragm 11 and opens and closes the large valve port 15 at the other end.
5, the partition wall 13 and the main diaphragm 11 are provided.
A coil spring 26 interposed between the valves 25 urges the valve 25 in the closing direction of the large valve opening 15. The valve 25 extends and retracts over a position where the large valve port 15 is closed and a position where the opening of the atmosphere introduction hole 17 is closed. The distribution chamber 14 of the control device 5 communicates with the vacuum waste water pipe 2 through the first conduit 27, and the rear chamber of the cylinder chamber 1c in which the spring 1e of the vacuum valve 1 is present communicates with the passage 16 through the second conduit 28. In addition, a ventilation pipe 19 is provided in the front chamber of the cylinder chamber 1c separated from the piston 1d.
An intake / exhaust conduit 29 that branches from is communicated.

In this structure, when the amount of dirty water in the dirty water tank S is small, the valve body 4 is in a closed state in which it is pressed against the valve seat 1b, the valve device 23 closes the small valve opening 9, and the valve 25 is the large valve opening. Block 15 In this state, the vacuum pressure in the vacuum waste water pipe 2 acts on the distribution chamber 14 through the first conduit 27,
Further, it acts on the variable vacuum chamber 10 and the constant vacuum chamber 12 through the pipe 21. Therefore, the variable vacuum chamber 10 and the constant vacuum chamber 12 have the same pressure, and the valve 25 closes the large valve opening 15 under the biasing force of the coil spring 26. On the other hand, the atmospheric pressure in the air introduction hole 17 acts on the atmospheric pressure chamber 8 through the ventilation passage 20, the sub diaphragm 7 is separated from the valve device 23, and the valve device 23 closes the small valve opening 9.

When the dirty water is collected in the dirty water tank S, the internal pressure of the water level detecting pipe 18a rises as the water level rises, the air pressure acting on the pressure detecting chamber 6 through the gas pressure introducing pipe 18 increases, and the sub diaphragm 7 becomes The valve device 23 is displaced by being displaced toward the atmospheric pressure chamber 8 side, and the valve device 23 opens the small valve opening 9. When the small valve opening 9 is opened, the atmospheric pressure acting on the atmospheric pressure chamber 8 acts on the variable vacuum chamber 10, the main diaphragm 11 is displaced toward the constant vacuum chamber 12 side, and the valve rod 24 is biased by the coil spring 26. The valve 25 separates from the large valve opening 15 to open the large valve opening 15 and closes the opening of the atmosphere introduction hole 17 facing the large valve opening 15.

[0007] Therefore, the distribution chamber 1 through the first conduit 27
The vacuum pressure of the vacuum waste water pipe 2 acting on 4 acts on the passage 16 through the large valve port 15, and further acts on the rear chamber of the cylinder chamber 1c through the second conduit 28. On the other hand, the cylinder chamber 1c
The atmospheric pressure of the ventilation pipe 19 acts on the front chamber of the cylinder chamber through the intake and exhaust pipes 29, and the piston is generated by the differential pressure between the atmospheric pressure acting on the front chamber of the cylinder chamber 1c and the vacuum pressure acting on the rear chamber of the cylinder chamber 1c. 1d retracts against the urging force of the spring 1c, and the valve body 4 is separated from the valve seat 1b and is in the open state. In this state, the sewage accumulated in the sewage basin is sucked up through the vacuum valve suction pipe 3 and the vacuum sewage pipe 1.

When the water level in the sewage basin drops due to suction,
As the internal pressure of the water level detection pipe 18a decreases, the air pressure acting on the pressure detection chamber 6 through the gas pressure introduction pipe 18 decreases, and the sub diaphragm 7 is pushed by the atmospheric pressure of the atmospheric pressure chamber 8 to return to the normal state. , The pressing force on the valve device 23 is released, and the valve device 23 closes the small valve opening 9. In this state, the variable vacuum chamber 10 becomes a vacuum pressure, the main diaphragm 11 receives the urging force of the coil spring 26 to return to the normal state, and the valve 25 closes the large valve opening 15. For this reason,
Atmospheric pressure acts on both the front chamber and the rear chamber of the cylinder chamber 1c, and the valve body 4 is moved to the valve seat 1b by the urging force of the spring 1e.
Closes to the position where it presses against and returns to the normal state.

[0009]

However, in the control device as described above, if the intake port of the ventilation pipe for introducing atmospheric pressure into the atmospheric pressure flow path system is provided inside the sewage basin, the water level detection pipe and the gas pressure will be reduced. There is a problem that sewage flows from the intake port into the control device when the water level in the sewage basin abnormally rises, such as when the vacuum valve does not open due to a failure in the gas pressure introducing means such as the introduction pipe. Therefore, the conventional technique is to dispose the intake port on the ground and provide the ventilation pipe.

The present invention solves the above problems, and an object of the present invention is to provide a control device for a vacuum valve in which dirty water does not flow even if an intake port is provided inside the dirty water container.

[0011]

In order to solve the above-mentioned problems, a control device for a vacuum valve according to the present invention communicates with a vacuum pressure channel system communicating with a vacuum dirty water pipe connected to the vacuum valve under atmospheric pressure. And a passage communicating with the rear chamber of the cylinder chamber of the vacuum valve, a large valve opening serving as a connection port of the vacuum pressure passage system for this passage, and a connection opening of the atmospheric pressure passage system for the passage. The air introduction hole that opens to face the large valve opening, the main valve means that moves back and forth over the position that closes the large valve opening and the position that closes the opening of the atmosphere introduction hole, and the constant vacuum of the vacuum pressure flow path system. The chamber and the variable vacuum chamber are partitioned from each other, and the main diaphragm is capable of pressing the main valve means toward the opening of the atmosphere introduction hole by receiving the pressure of the variable vacuum chamber, and the atmospheric pressure chamber communicating with the variable vacuum chamber through the small valve port. A sub-valve means for opening and closing a small valve opening arranged in the atmospheric pressure chamber,
A sub-diaphragm that partitions the pressure detection chamber and the atmospheric pressure chamber and receives the pressure in the pressure detection chamber to urge the sub-valve means in the opening direction.
A ventilation pipe that forms part of the atmospheric pressure passage system and communicates with the atmosphere introduction hole, an intake and exhaust conduit that branches from the middle of the ventilation pipe and communicates with the front chamber of the cylinder chamber of the vacuum valve, and the water level in the sewage basin. In a control device having a gas pressure introducing means for introducing into the pressure detection chamber as a gas pressure, the intake port of the ventilation pipe is provided inside the sewage basin, and the set high water level in the sewage basin below the intake port is set. This is a working water level and is provided with a forced opening device for opening the vacuum valve by introducing atmospheric pressure into the variable vacuum chamber.

[0012]

When the vacuum valve is closed, atmospheric pressure acts on both the front chamber and the rear chamber of the cylinder chamber. Further, according to the above configuration, when the sewage in the sewage basin reaches the set high water level below the intake port, the forced opening device operates and the atmospheric pressure is introduced into the variable vacuum chamber. When the atmospheric pressure is introduced into the variable vacuum chamber, the main diaphragm receives the pressure and is displaced toward the constant vacuum chamber side to press the main valve means to open the large valve opening and face the large valve opening. The opening of the air introduction hole is closed. As a result, the vacuum pressure of the vacuum sewage pipe is sequentially introduced into the passage and the rear chamber of the cylinder chamber through the large valve opening, the vacuum pressure acts on the rear chamber to open the vacuum valve, and the water level in the sewage basin is lowered. . Since the vacuum valve is opened when the sewage reaches the set high water level below the intake port in this way, even if the intake port is provided inside the sewage basin, the sewage will flow into the control device from the intake port. Is prevented.

[0013]

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. Members having the same functions as those described above with reference to FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted. In FIG. 1, a vacuum sewage pipe 2 and a vacuum valve suction pipe 3 having a vacuum valve 1 having a control device 5 are provided inside the sewage basin S to vacuum the sewage collected in the sewage basin S. The valve suction pipe 3 is sucked from one end. The control device 5 provides the ventilation pipe 19 having the intake port 31 for introducing the atmospheric pressure inside the wastewater basin S, and when the water level in the wastewater basin reaches the set high water level HL below the intake port 31. A forced opening device 32 that operates and introduces atmospheric pressure into the variable vacuum chamber 10 is provided.

The forced opening device 32 is, for example, a float valve device as shown in FIG.
3 is provided with an air inlet small valve opening 34 inside, and the other end is provided with an air supply pipe 35 communicating with the variable vacuum chamber 10, and a float 3 that moves up and down due to fluctuation of the water level in the sewage basin.
6 is provided outside the container 33, and is provided with a float valve 37 which is interlocked with the vertical movement of the float 36 and opens and closes the atmosphere introduction small valve opening 34 when the water level in the sewage basin becomes a high water level HL. It is provided inside 33.

The operation of the above structure will be described below.
Inside the sewage basin S, the sewage is normally at a low water level LL, but when the water level rises to a high water level HL due to a failure of the control device 5 or the like, the float 36 of the forced opening device 32 moves upward. Along with this, the float valve 37 moves downward, and the atmosphere introduction small valve opening 34 is opened.

As a result, the atmospheric pressure in the container 33 is introduced into the variable vacuum chamber 10 through the small air inlet valve 34, and the main diaphragm 11 is moved to the constant vacuum chamber 12 side under the pressure of the variable vacuum chamber 10. The valve rod 24 is displaced and presses the valve rod 24 against the urging force of the coil spring 26, the valve 25 is separated from the large valve opening 15 to open the large valve opening 15, and the atmosphere introduction hole facing the large valve opening 15 is formed. Close 17 openings.

The vacuum pressure of the vacuum waste water pipe 2 is increased by the large valve opening 1.
5 is introduced into the passage 16, the second conduit 28, and the rear chamber 1f of the cylinder chamber 1c. As a result, the vacuum valve 1 is opened, and the dirty water is sucked from one end of the vacuum valve suction pipe 3. In this way, when the sewage reaches a certain high water level HL below the intake port 31, the sewage is sucked in, so that the water level in the sewage basin S is prevented from exceeding the certain high water level HL, and the intake port Sewage does not flow from 31 to the control device 5.

[0018]

As described above, according to the present invention, the forcible opening device is provided inside the sewage basin, and when the water level in the sewage basin is raised to the set high water level by the forcible opening device, it is placed in the variable vacuum chamber. Since the vacuum valve is opened by introducing the atmospheric pressure, the sewage that exceeds the set high water level is sucked from one end of the vacuum valve suction pipe 3, and the sewage flows into the intake port located above this water level. Is prevented. Therefore, even in the ventilation pipe having the intake port arranged inside the sewage basin, the sewage does not flow into the control device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a wastewater collection device including a control device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a main part of the control device of FIG.

FIG. 3 is an explanatory diagram showing an overall configuration of a conventional control device.

[Explanation of symbols]

 1 Vacuum valve 1c Cylinder chamber 1f Rear chamber 4 Valve body 5 Control device 6 Pressure detection chamber 7 Sub diaphragm 8 Atmospheric pressure chamber 9 Small valve opening 10 Variable vacuum chamber 11 Main diaphragm 16 Passage 17 Atmosphere introduction hole 19 Vent pipe 23 Valve device 25 Valve 29 Intake and exhaust conduit 31 Intake port 32 Forced opening device S Sewage basin HL High water level

Claims (1)

[Claims] 1. A vacuum pressure channel system communicating with a vacuum wastewater pipe connected to a vacuum valve, an atmospheric pressure channel system communicating with atmospheric pressure, and a channel communicating with a rear chamber of a cylinder chamber of the vacuum valve. A large valve port that forms a connection port of the vacuum pressure channel system to this passage,
An atmospheric air introduction hole which is a connection opening of the atmospheric pressure flow path system to the passage and opens facing the large valve opening, and a main opening and closing unit that closes the large valve opening and a position that closes the opening of the atmospheric air introduction hole. The valve means, the constant vacuum chamber of the vacuum pressure flow path system and the variable vacuum chamber are partitioned from each other, and the main valve means receives the pressure of the variable vacuum chamber and presses the main valve means toward the opening of the atmosphere introduction hole. An atmospheric pressure chamber communicating through the valve port, a sub-valve means for opening and closing a small valve port arranged in the atmospheric pressure chamber, a pressure detecting chamber and an atmospheric pressure chamber are partitioned, and the sub-valve means receives pressure from the pressure detecting chamber. The sub-diaphragm that urges the valve in the opening direction, the ventilation pipe that forms a part of the atmospheric pressure passage system and communicates with the atmosphere introduction hole, and branches from the middle of the ventilation pipe to communicate with the front chamber of the vacuum valve cylinder chamber. Gas that is introduced into the pressure detection chamber as the gas pressure of the intake and exhaust conduits and the water level in the sewage basin In a control device provided with an introducing means, an intake port of the ventilation pipe is provided inside a sewage basin, a set high water level in the sewage basin below the intake port is set as an operating water level, and an atmospheric pressure is provided in the variable vacuum chamber. A control device for a vacuum valve, characterized in that a forced opening device for introducing a valve to open the vacuum valve is provided.