JP6637364B2 - Vacuum valve control device and vacuum valve unit - Google Patents

Description

  The present invention relates to a vacuum valve control device and a vacuum valve unit.

  2. Description of the Related Art Conventionally, a vacuum-type sewer collection system has been used when sewage pipes cannot be arranged with a continuous downward slope, such as in a flat and wide area. As this type of vacuum sewer collection system, a vacuum sewer collection system described in Patent Document 1 is known.

  In the vacuum sewer collection system of Patent Document 1, a line (vacuum system) communicating with a vacuum tank is connected to a vacuum valve unit. The vacuum valve unit includes a suction pipe and a pressure sensor pipe whose first end is disposed in a sewage basin, a vacuum valve disposed between the suction pipe and the line, and a vacuum valve that controls opening and closing operations of the vacuum valve. A control device.

In the vacuum valve control device, a first chamber and a second chamber are formed with the first diaphragm interposed therebetween, and a third chamber and a fourth chamber are formed with the second diaphragm interposed therebetween. A shaft (shaft) extending in the thickness direction of each diaphragm is arranged in the vacuum valve control device. A fifth chamber and a sixth chamber adjacent to each other via a partition are formed in the vacuum valve control device. A valve body is fixed to an end of the shaft. The partition wall between the fifth chamber and the sixth chamber, and the wall of the sixth chamber facing the partition wall are provided with a valve seat having a through hole. The shaft reciprocates in the axial direction of the shaft to seal one of the pair of valve seats.
The suction pipe, the pressure sensor pipe, the vacuum valve, and each chamber of the vacuum valve control device are connected by a flexible tube.

The vacuum valve unit configured as described above operates as follows. In advance, the vacuum valve is closed and the valve seat seals the valve seat of the partition.
When the water level of the sewage in the sewage basin is higher than a predetermined height, the water level of the sewage in the pressure sensor pipe increases, and the air pressure in the first chamber and the air pressure in the second chamber of the vacuum valve control device become Differences occur. This pressure difference causes the shaft of the vacuum valve controller to move. The valve seat seals the valve seat on the wall and opens the vacuum valve. By the suction force of the vacuum tank, sewage flows through a suction pipe, a vacuum valve, and a line, and the sewage is treated in a sewage treatment facility or the like. At this time, a difference occurs between the pressure of the air in the third room and the pressure of the air in the fourth room due to the sewage flowing in the suction pipe. Thereby, the valve seat is pressed against the valve seat on the wall.

Even if the water level of the sewage drops and the pressure of the air in the first room reaches the atmospheric pressure, the vacuum valve remains open while there is a difference between the air pressure in the third room and the air pressure in the fourth room. Up to.
When the level of the sewage in the sewage tank falls below the first end of the suction pipe, the sewage does not flow through the suction pipe, and the difference between the pressure of the air in the third chamber and the pressure of the air in the fourth chamber decreases. For this reason, the shaft is moved by the reaction force of the spring, and the valve seat seals the valve seat of the partition wall. The vacuum valve closes and sewage stops flowing through the suction pipe and the like.

JP 2011-196113 A

  However, in this vacuum valve control device, when the vacuum valve is not automatically opened by the control of the vacuum valve control device, the vacuum valve cannot be forcibly opened to switch to a state in which sewage flows in the suction pipe.

  The present invention has been made in view of such problems, and is a vacuum valve control device that can be manually operated to switch from a state in which sewage does not flow in a suction pipe to a state in which sewage flows in a suction pipe. , And a vacuum valve unit provided with the vacuum valve control device.

In order to solve the above problems, the present invention proposes the following means.
The vacuum valve control device of the present invention is arranged between a suction pipe arranged at one end in a sewage basin and a vacuum system for transferring sewage by a vacuum suction force to supply vacuum and atmospheric pressure. A vacuum valve control device that controls a vacuum valve that opens and closes, a vacuum valve opening and closing mechanism that switches between vacuum and atmospheric pressure supplied for opening and closing the vacuum valve, and a reciprocating mechanism that operates the vacuum valve opening and closing mechanism. A shaft body, a spring for urging the shaft body in a direction to close the vacuum valve, a first diaphragm and a second diaphragm that can reciprocate integrally with the shaft body, and a first diaphragm. A first chamber and a second chamber for generating a differential pressure on both sides to move the shaft in the direction in which the vacuum valve is opened, and a differential pressure on both sides of the second diaphragm to generate the shaft, The third chamber for moving the vacuum valve in the opening direction A fourth magnetic chamber, a first magnetic force generator attached to the first diaphragm radially outside the shaft body, the first chamber, the second chamber, the third chamber, and the fourth chamber. A housing in which a chamber is formed, and a first chamber of the housing, which forms the first chamber and is attached to a wall facing the first diaphragm to generate a magnetic force attracting the first magnetic force generator. The second magnetic force generator, wherein the vacuum valve closes when the first magnetic force generator approaches and the second magnetic force generator opens when the vacuum valve opens when separated from the first magnetic force generator, A moving member that is movable in the axial direction of the shaft body, and that moves the shaft body in the axial direction;
Bei example, the second magnetic force generating member and is characterized by being more spaced around said axis.

According to the present invention, before the vacuum valve is forcibly opened, the first magnetic force generator and the second magnetic force generator approach to close the vacuum valve, so that no wastewater flows in the suction pipe. I have. When the user operates the moving member to move the shaft in the axial direction to separate the first magnetic force generator from the second magnetic force generator, the vacuum valve is opened and sewage flows through the suction pipe.
In addition, a magnetic force is generated almost uniformly around the axis between the first magnetic force generator and the second magnetic force generator, and the inclination of the shaft body with respect to the wall can be suppressed.

In addition, the vacuum valve control device of the present invention is arranged between a suction pipe whose first end is disposed in a sewage basin and a vacuum system that transfers sewage by vacuum suction, and supplies vacuum and atmospheric pressure. A vacuum valve control device that controls a vacuum valve that opens and closes by switching between a vacuum and an atmospheric pressure supplied for opening and closing the vacuum valve, and a reciprocating mechanism that operates the vacuum valve opening and closing mechanism. A movable shaft, a spring that biases the shaft in a direction to close the vacuum valve, a first diaphragm and a second diaphragm that can reciprocate integrally with the shaft, A first chamber and a second chamber for generating a differential pressure on both sides of the diaphragm to move the shaft in a direction to open the vacuum valve, and a differential pressure on both sides of the second diaphragm to generate the differential pressure, Moving the body in the direction to open the vacuum valve A third chamber and a fourth chamber, a first magnetic force generator attached to the first diaphragm radially outside the shaft-like body, the first chamber, the second chamber, the third chamber, and the A housing in which four chambers are formed, and a magnetic force attracting between the first magnetic force generator and being attached to a wall that forms the first chamber of the housing and faces the first diaphragm. Occurs, the vacuum valve is closed when the first magnetic force generator approaches, and the second magnetic force generator that opens when the vacuum valve is separated from the first magnetic force generator, provided on the wall portion, A moving member that is movable in the axial direction of the shaft-like body, and that moves the shaft-like body in the axial direction, wherein the second magnetic force generator has a ring shape with the axis as a central axis. It is characterized by being formed .
According to the present invention, before the vacuum valve is forcibly opened, the first magnetic force generator and the second magnetic force generator approach to close the vacuum valve, so that no wastewater flows in the suction pipe. I have. When the user operates the moving member to move the shaft in the axial direction to separate the first magnetic force generator from the second magnetic force generator, the vacuum valve is opened and sewage flows through the suction pipe.
In addition, a magnetic force can be generated more uniformly around the axis between the first magnetic force generator and the second magnetic force generator, and the inclination of the shaft-like body with respect to the wall can be suppressed more reliably.

In the above-described vacuum valve control device, the first magnetic force generator may be an iron plate, and the second magnetic force generator may be a permanent magnet.
According to the present invention, a magnetic force can be generated between the iron plate and the permanent magnet with a simple configuration including the iron plate and the permanent magnet.

Further, a vacuum valve unit according to the present invention includes any one of the above-described vacuum valve control devices, the suction pipe, and the vacuum valve.
ADVANTAGE OF THE INVENTION According to this invention, a vacuum valve can be opened and closed by the vacuum valve control apparatus which can switch to the state in which sewage flows in a suction pipe by operating manually.

  ADVANTAGE OF THE INVENTION According to the vacuum valve control apparatus and the vacuum valve unit of this invention, it can switch by the manual operation from the state in which sewage does not flow in a suction pipe to the state in which sewage flows in a suction pipe.

It is a side view of the vacuum valve unit of one embodiment of the present invention. It is sectional drawing of the side surface which shows the same vacuum valve unit typically. It is a top view which shows the same vacuum valve unit typically. It is sectional drawing of the side surface shown typically for demonstrating the effect | action of the same vacuum valve unit. It is sectional drawing of the side surface shown typically for demonstrating the effect | action of the same vacuum valve unit. It is sectional drawing of the side surface typically shown for demonstrating the procedure at the time of forcibly opening the vacuum valve of the same vacuum valve unit. It is a top view which shows typically the vacuum valve unit in embodiment of the modification of this invention.

Hereinafter, an embodiment of a vacuum valve unit according to the present invention will be described with reference to FIGS.
FIG. 1 shows the sizes and shapes of a sewage chamber 101, a vacuum valve 12, a vacuum valve control device 21, and the like, which will be described later, relatively more accurately than those shown in FIG. FIG. 2 et seq. Schematically shows the size and shape of the sewage tank 101 and the like adjusted for convenience of explanation.
As shown in FIG. 1 and FIG. 2, the present vacuum valve unit 1 includes a suction pipe 11, a vacuum valve 12, and a vacuum valve control device 21 of the present embodiment.
A first end of the suction pipe 11 and a first end of the pressure sensor pipe 14 are arranged in a sewage trough 101 buried in the ground G. The upper opening of the sewage trough 101 is covered with a lid 101a.

  The vacuum valve control device 21 controls the above-described vacuum valve 12 disposed between the suction pipe 11 and a line (vacuum system) 103 for transferring the sewage W by a vacuum suction force. The vacuum valve control device 21 includes a casing (housing) 22, a shaft (shaft) 23 disposed in the casing 22, a shaft urging spring (spring) 24, a first diaphragm 25, a second diaphragm 26, A first chamber 27, a second chamber 28, a third chamber 29, and a fourth chamber 30 are provided.

In this embodiment, as shown in FIGS. 2 and 3, the casing 22 has a main body 33 formed in a cylindrical shape, and a lid (wall) 35 attached to the main body 33 with bolts 34. The plurality of bolts 34 are arranged at intervals around the axis C of the shaft 23 which is the axis of the main body 33.
In the main body 33, a first partition 37, a second partition 38, and a third partition 39 are formed at an interval from the first end 33a in the direction of the axis C of the main body 33 toward the second end 33b. I have.
The casing 22 is arranged such that the second end 33b is lower Z1 than the first end 33a. That is, the main body 33 is arranged so that the direction along the axis of the main body 33 is the vertical direction.

The above-mentioned first diaphragm 25 is arranged at an intermediate portion in the direction of the axis C of the internal space formed between the lid 35 and the first partition 37. The first diaphragm 25 divides this internal space into a first chamber 27, which is an internal space far from the second end 33b, and a second chamber 28, which is an internal space near the second end 33b. Since the pressure of the air in the first chamber 27 is higher than the pressure of the air in the second chamber 28, the first chamber 27 and the second chamber 28 generate a differential pressure on both sides of the first diaphragm 25, The shaft 23 is moved in a direction to open the vacuum valve 12. The direction in which the vacuum valve 12 is opened is a direction from the first end 33a to the second end 33b, that is, the downward direction Z1.
The second chamber 28 communicates with outside air via a pipe (not shown).

  The first diaphragm 25 is formed in a disc shape with an elastic material such as rubber. An iron plate (iron plate material, first magnetic force generator) 41 is attached to the first diaphragm 25. The iron plate 41 is formed in a disk shape with a material such as ferrite, for example. That is, the iron plate 41 is attached to at least the radial outer side of the shaft 23 in the first diaphragm 25. The iron plate 41 is formed sufficiently thin, and when the first diaphragm 25 is deformed, the iron plate 41 is deformed integrally with the first diaphragm 25.

As shown in FIGS. 2 and 3, a plurality of permanent magnets (second magnetic force generators) 43 are attached to the lid 35 that forms the first chamber 27 of the casing 22 and faces the first diaphragm 25. . Here, the term “opposite” includes not only a case where the first diaphragm 25 and the cover 35 are separated but also a case where the first diaphragm 25 and the cover 35 are in contact with each other. The case where another member is arranged between the first diaphragm 25 and the lid 35 is also included.
The plurality of permanent magnets 43 are arranged at intervals around the axis C. The plurality of permanent magnets 43 are preferably arranged at equal angles around the axis C. Each permanent magnet 43 is attached to a surface of the lid 35 facing the first diaphragm 25 by an adhesive or the like.

Each permanent magnet 43 generates a magnetic force attracting the iron plate 41. When the permanent magnet 43 and the iron plate 41 approach each other due to the first diaphragm 25 contacting each permanent magnet 43, the magnetic force acting on the permanent magnet 43 and the iron plate 41 increases. Since the plurality of permanent magnets 43 are arranged at intervals around the axis C, a magnetic force is generated substantially uniformly around the axis C between the permanent magnet 43 and the iron plate 41, and the shaft 23 Of the first shaft 23a is suppressed.
On the other hand, when the permanent magnets 43 and the iron plate 41 are separated from each other, the magnetic force acting on the permanent magnets 43 and the iron plate 41 becomes weak.
The first magnetic force generator is the iron plate 41, and the second magnetic force generator is the permanent magnet 43. With a simple configuration of the iron plate 41 and the permanent magnet 43, a magnetic force is generated between the iron plate 41 and the permanent magnet 43.

The cover (35) is provided with a switch (moving member) 45 that can move in the direction of the axis C with respect to the cover (35). More specifically, a through hole 35a is formed in the lid 35 on the axis C in the direction of the axis C, and the switch 45 is inserted through the through hole 35a. The switch 45 is formed in a column shape having the axis C as an axis. The switch 45 is inserted into a switch biasing spring 46 which is, for example, a helical spring. The switch 45 and the switch biasing spring 46 are covered with a cover 47 that seals the through hole 35 a of the lid 35. The end of the switch 45 is in contact with the upper surface of the first diaphragm 25.
When no external force is applied to the switch 45, the switch 45 is moved upward Z2 (in a direction from the second end 33b of the main body 33 toward the first end 33a) by the urging force of the switch urging spring 46. On the other hand, when the user moves the switch 45 downward Z1 with respect to the lid 35 against the urging force of the switch urging spring 46, the first shaft 23a moves downward Z1.

A first shaft 23a is fixed to the first diaphragm 25 so as to extend downward Z1 from the first diaphragm 25. That is, the first diaphragm 25 reciprocates in the direction of the axis C integrally with the first shaft 23a. The first shaft 23a is not fixed to the first partition 37, but passes through the first partition 37 so as to be movable in the direction of the axis C with respect to the first partition 37. Between the first partition 37 and the first shaft 23a, there is provided a seal mechanism whose reference numeral is omitted.
The first shaft 23a is inserted into the first shaft urging spring 24a constituting the shaft urging spring 24. The first shaft urging spring 24a urges the first shaft 23a and the first diaphragm 25 with respect to the main body 33 in a direction in which the vacuum valve 12 described later is closed, that is, in the upward direction Z2.
The end of the first shaft 23a is in contact with the upper surface of the second diaphragm 26.

  The above-mentioned second diaphragm 26 is disposed at an intermediate portion of the internal space formed between the first partition 37 and the second partition 38 in the direction of the axis C. The second diaphragm 26 partitions this internal space into a third chamber 29, which is an internal space near the first end 33a, and a fourth chamber 30, which is an internal space near the second end 33b. Since the pressure of the air in the third chamber 29 is higher than the pressure of the air in the fourth chamber 30, the third chamber 29 and the fourth chamber 30 generate a differential pressure on both sides of the second diaphragm 26, The shaft 23 is moved downward Z1.

A second shaft 23b constituting the shaft 23 is fixed to the second diaphragm 26 so as to extend downward Z1 from the second diaphragm 26. That is, the second diaphragm 26 reciprocates in the direction of the axis C integrally with the second shaft 23b. The second shaft 23b is not fixed to the second partition 38, but passes through the second partition 38 so as to be movable in the direction of the axis C with respect to the second partition 38. Between the second partition wall 38 and the second shaft 23b, a seal mechanism whose reference numeral is omitted is provided.
The second shaft 23b is inserted into a second shaft urging spring 24b constituting the shaft urging spring 24. The second shaft urging spring 24b urges the second shaft 23b and the second diaphragm 26 upward Z2.

Below the fourth chamber 30 in the main body 33, a fifth chamber 50 and a sixth chamber 51 are formed. That is, the first chamber 27, the second chamber 28, the third chamber 29, the fourth chamber 30, the fifth chamber 50, and the sixth chamber 51 are formed inside the casing 22. A fifth chamber 50 is formed in the main body 33 at a position opposite to the fourth chamber 30 with the second partition 38 interposed therebetween. A sixth chamber 51 is formed in the main body 33 at a position opposite to the fifth chamber 50 with the third partition wall 39 interposed therebetween.
In the third partition wall 39, a valve seat 53 having a through hole is arranged on the axis C.
A valve seat 54 having a through-hole 54 a is arranged on the axis C in a wall portion of the main body 33 facing the third partition wall 39. The valve seat 54 is disposed below the valve seat 53 at Z1. The sixth chamber 51 communicates with the outside air by the through hole 54 a of the valve seat 54.

A valve body 56 is fixed to an end of the second shaft 23b disposed in the sixth chamber 51. The fifth chamber 50, the sixth chamber 51, the valve body 56, and the through-hole 54a constitute a vacuum valve opening / closing mechanism 55 that switches between vacuum and atmospheric pressure supplied for opening / closing the vacuum valve 12. The shaft 23 having the shafts 23a and 23b operates the vacuum valve opening / closing mechanism 55 by reciprocating in the direction of the axis C as described later.
When the second shaft 23b moves upward Z2 and the valve body 56 comes into contact with the valve seat 53, the through hole of the valve seat 53 is sealed by the valve body 56. At this time, since the through hole 54a of the valve seat 54 is not sealed, the sixth chamber 51 communicates with the outside air.
On the other hand, when the second shaft 23b moves downward Z1 and the valve body 56 comes into contact with the valve seat 54, the through hole 54a of the valve seat 54 is sealed by the valve body 56. At this time, the fifth chamber 50 and the sixth chamber 51 communicate with each other because the through hole of the valve seat 53 is not sealed.

As shown in FIG. 2, communication holes 11 a and 11 b are formed in the suction pipe 11 at intervals in a vertical direction which is a longitudinal direction of the suction pipe 11. The communication hole 11a is formed above Z2 above the communication hole 11b. An air suction pipe 11c communicating with the outside air is provided between the connection part of the suction pipe 11 with the line 103 and the communication hole 11a.
The communication hole 11a communicates with the fourth chamber 30 via the connection pipe 61. The communication hole 11b communicates with the third chamber 29 via the connection pipe 62. The pressure sensor pipe 14 communicates with the first chamber 27 via a connection pipe 63.

The vacuum valve 12 has a diaphragm 12b arranged in the piston chamber 12a, and a vacuum valve spring 12c for urging the diaphragm 12b. A valve element 12d is fixed to the diaphragm 12b.
When the shaft 23 moves upward Z2 and the pressure of the air in the piston chamber 12a of the vacuum valve 12 is the atmospheric pressure PM as described later, the spring 12c for the vacuum valve is extended, and the valve body 12d is connected to the suction pipe 11 by a line. It comes into contact with the connection portion with 103. Thus, the suction pipe 11 and the line 103 are cut off by the valve body 12d, and the vacuum valve 12 is closed.
On the other hand, when the shaft 23 moves downward Z1 and the inside of the piston chamber 12a is at a negative pressure (vacuum) PL as described later, the vacuum valve spring 12c contracts, and the valve body 12d moves between the suction pipe 11 and the line 103. Away from the connection. As a result, the suction pipe 11 and the line 103 are in communication with each other, and the vacuum valve 12 is opened.
Thus, the vacuum valve 12 opens and closes by supplying vacuum and atmospheric pressure into the piston chamber 12a.

The piston chamber 12a communicates with the sixth chamber 51 via the connection pipe 65. The line 103 communicates with the fifth chamber 50 via the connecting pipe 66.
The connecting pipes 61, 62, 63, 65, and 66 form a connecting pipe set 67 by bundling the intermediate portions in the longitudinal direction. The connection pipe set 67 can be formed of a resin such as polyethylene. An intermediate portion in the longitudinal direction of the connection pipe set 67 is inserted into a communication hole 105 a of a partition plate 105 attached to the sewage tank 101. The partition plate 105 is used as a scaffold for the user.

Next, the operation of the vacuum valve unit 1 configured as described above will be described.
In FIG. 2, the water level of the sewage W in the sewage tank 101 is relatively low. The pressure of the air in the pressure sensor tube 14, the pressure of the air in the first chamber 27, and the pressure of the air in the second chamber 28 are the atmospheric pressure PM. In the following, air at a positive pressure PH (pressure higher than the atmospheric pressure PM) is indicated by relatively dark gray dots. Air at negative pressure PL (pressure lower than atmospheric pressure PM) is indicated by relatively light gray dots. Air at atmospheric pressure PM is indicated by gray dots of a medium density between relatively dark gray and relatively light gray. Since the inside of the second chamber 28 is always the atmospheric pressure PM, the description of the dots is omitted. In the third chamber 29 and the fourth chamber 30, the description of dots is omitted.

In FIG. 2, since the waste water W does not flow in the suction pipe 11, there is no air pressure difference between the third chamber 29 and the fourth chamber 30. The shafts 23a and 23b are moved upward Z2 by the urging force of the shaft urging springs 24a and 24b. The switch 45 is moved upward Z2 by the urging force of the switch urging spring 46.
Therefore, the valve body 56 is in contact with the valve seat 53. Since the through hole 54a of the valve seat 54 is not sealed, the pressure of the air in the sixth chamber 51 is the atmospheric pressure PM. The pressure of the air in the piston chamber 12a communicating with the sixth chamber 51 via the connection pipe 65 is the atmospheric pressure PM.

Since the inside of the line 103 communicates with a vacuum tank (not shown), the pressure of the air in the line 103 is a negative pressure PL. The diaphragm 12b of the vacuum valve 12 approaches the connection between the suction pipe 11 and the line 103 due to the pressure difference between the piston chamber 12a and the line 103. The vacuum valve spring 12c is extended, and the vacuum valve 12 is closed.
The pressure of the air in the fifth chamber 50 communicating with the line 103 via the connection pipe 66 is a negative pressure PL.

When the water level of the sewage W in the sewage tank 101 rises from the state of FIG. 2, the vacuum valve control device 21 performs a vacuum valve opening process described below. As shown in FIG. 4, the pressure of the air in the pressure sensor tube 14 increases, and the pressure becomes a positive pressure PH. The pressure of the air in the first chamber 27 communicating with the pressure sensor pipe 14 via the connection pipe 63 becomes a positive pressure PH.
Due to the pressure difference between the first chamber 27 and the second chamber 28, the diaphragms 25, 26 resist the urging force of the shaft urging springs 24a, 24b and the magnetic force acting on the iron plate 41 and the permanent magnet 43, and the shafts 23a, It moves downward Z1 together with 23b. The magnetic force acting on the iron plate 41 and the permanent magnet 43 is weakened.
The valve body 56 is separated from the valve seat 53, and the valve body 56 contacts the valve seat 54. Since the through hole of the valve seat 53 is not sealed, the fifth chamber 50 and the sixth chamber 51 communicate with each other. The pressure of the air in the sixth chamber 51 and the pressure of the air in the piston chamber 12a communicating with the sixth chamber 51 via the connection pipe 65 become the negative pressure PL. The vacuum valve spring 12c contracts and the vacuum valve 12 opens.

When the pressure of the air in the suction pipe 11 becomes the negative pressure PL, the sewage W flows through the suction pipe 11 and the line 103. At this time, the air flowing into the suction pipe 11 through the air suction pipe 11c and the sewage W are mixed.
The flow of the sewage W into the suction pipe 11 causes the pressure of the air in the connection pipe 62 and the third chamber 29 to be higher than the pressure of the air in the connection pipe 61 and the fourth chamber 30. The second diaphragm 26 and the second shaft 23b are pressed further downward Z1.
The sewage W flows into the suction pipe 11, and the surface of the sewage W drops to the position L1. At this time, as shown in FIG. 5, the pressure of the air in the pressure sensor tube 14 and the pressure of the air in the first chamber 27 become the atmospheric pressure PM, and the air in the chambers 27 and 28 on both sides of the first diaphragm 25 is changed. Are approximately equal. The first shaft 23a and the first diaphragm 25 move upward Z2 by the urging force of the first shaft urging spring 24a. The magnetic force acting on the iron plate 41 and the permanent magnet 43 increases.
Due to the pressure difference between the third chamber 29 and the fourth chamber 30, the second diaphragm 26 and the second shaft 23b are pressed downward Z1 as shown in FIG. 4, and the valve body 56 remains in contact with the valve seat 54. It is.

As shown in FIG. 5, it will be described below that the position L2 of the water surface of the sewage W is located below Z1 below the first end of the suction pipe 11 and the first end of the suction pipe 11 starts to suck air. A vacuum valve closing step is performed.
The pressure of the air in the third chamber 29 and the pressure of the air in the fourth chamber 30 become substantially equal. The second shaft 23b and the second diaphragm 26 move upward Z2 by the urging force of the second shaft urging spring 24b. The valve body 56 is separated from the valve seat 54, and the valve body 56 contacts the valve seat 53. Since the through hole 54a of the valve seat 54 is not sealed, the pressure of the air in the sixth chamber 51 becomes the atmospheric pressure PM. The pressure of the air in the piston chamber 12a communicating with the sixth chamber 51 via the connection pipe 65 becomes the atmospheric pressure PM. The vacuum valve 12 closes.

When the water level of the sewage W in the sewage tank 101 rises again, the vacuum valve opening step and the vacuum valve closing step described above are performed, and the sewage W in the sewage tank 101 flows into the suction pipe 11.
As described above, normally, the vacuum valve 12 is automatically closed or opened under the control of the vacuum valve control device 21.

When the vacuum valve 12 is forcibly opened, a process described below is performed.
That is, the user removes the lid 101a from the sewage chamber 101 as shown in FIG. At this time, the iron plate 41 is approaching each permanent magnet 43, and the vacuum valve 12 is closed. The switch 45 is moved downward Z1 with the finger Q1 or the like against the urging force of the switch urging spring 46 and the magnetic force acting on the iron plate 41 and the permanent magnet 43. Since the switch 45 is located in the upper part Z2 in the sewage chamber 101, it is easy to operate the switch 45 from outside.
With the switch 45, the first diaphragm 25, the first shaft 23a, the second diaphragm 26, and the second shaft 23b move downward Z1.
The valve body 56 is separated from the valve seat 53, and the valve body 56 contacts the valve seat 54. The fifth chamber 50 and the sixth chamber 51 communicate with each other, and the pressure of the air in the sixth chamber 51 and the pressure of the air in the piston chamber 12a become negative pressure PL. The vacuum valve spring 12c contracts and the vacuum valve 12 opens. Sewage W flows through the suction pipe 11 and the line 103.

  When the pressure of the air in the connection pipe 62 and the third chamber 29 becomes higher than the pressure of the air in the connection pipe 61 and the fourth chamber 30, the second shaft 23b is pressed downward Z1. When the finger Q1 is released from the switch 45, the switch 45 moves upward Z2 by the urging force of the switch urging spring 46. However, since the valve body 56 remains in contact with the valve seat 54, the sewage W continues to flow through the suction pipe 11 until the first end of the suction pipe 11 starts to suck air.

As described above, according to the vacuum valve control device 21 of the present embodiment, before the vacuum valve 12 is forcibly opened, the permanent magnet 43 and the iron plate 41 approach to close the vacuum valve 12, and The sewage W does not flow in the pipe 11. When the user operates the switch 45 to move the shaft 23 in the direction of the axis C to separate the permanent magnet 43 from the iron plate 41, the vacuum valve 12 is opened and the dirty water W flows through the suction pipe 11.
Therefore, by manually operating the switch 45, it is possible to switch from a state in which the sewage W does not flow in the suction pipe 11 to a state in which the sewage W flows in the suction pipe 11.

The plurality of permanent magnets 43 are arranged around the axis C at intervals. For this reason, a magnetic force is generated almost uniformly around the axis C between the permanent magnet 43 and the iron plate 41, and the inclination of the shaft 23 with respect to the lid 35 can be suppressed.
The first magnetic force generator is an iron plate 41, and the second magnetic force generator is a permanent magnet 43. Thereby, a magnetic force can be generated between the iron plate 41 and the permanent magnet 43 with a simple configuration including the iron plate 41 and the permanent magnet 43.
Further, according to the vacuum valve unit 1 of the present embodiment, the vacuum valve 12 can be opened and closed by the vacuum valve control device 21 which can be manually operated to switch the state in which the waste water W flows in the suction pipe 11. it can.

As described above, one embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the configuration can be changed, combined, or deleted without departing from the gist of the present invention. Etc. are also included.
For example, in the above embodiment, the permanent magnet 71 may be formed in a ring shape with the axis C as the central axis, as in the vacuum valve unit 2 shown in FIG. With this configuration, a magnetic force is more uniformly generated around the axis C between the permanent magnet 71 and the iron plate 41, and the inclination of the shaft 23 with respect to the lid 35 can be suppressed more reliably.

Although the first shaft 23a and the second shaft 23b are described as being separated from each other, the shafts 23a and 23b may be integrated to form a shaft. Similarly, the first shaft urging spring 24a and the second shaft urging spring 24b are separated, but the shaft urging springs 24a and 24b may be integrated to form a shaft urging spring. .
It is assumed that the first magnetic force generator is the iron plate 41 and the second magnetic force generator is the permanent magnet 43. However, the first and second magnetic force generators are not limited to this, for example, the first magnetic force generator may be a permanent magnet and the second magnetic force generator may be an iron plate, or the first and second magnetic force generators May be permanent magnets that generate a magnetic force that attracts each other.
The vacuum valve control device 21 does not need to include the switch urging spring 46 and the cover 47.

1, 2 vacuum valve unit 11 suction pipe 12 vacuum valve 21 vacuum valve controller 22 casing (housing)
23 Shaft (shaft)
24 Shaft biasing spring (spring)
25 first diaphragm 26 second diaphragm 27 first room 28 second room 29 third room 30 fourth room 35 lid (wall)
41 Iron plate (first magnetic force generator)
43, 71 Permanent magnet (second magnetic force generator)
45 switch (moving member)
101 Sewage water tank 103 line (vacuum system)
C axis W Sewage

Claims (4)

The first end is disposed between a suction pipe arranged in a sewage basin and a vacuum system for transferring sewage by vacuum suction, and a vacuum for controlling a vacuum valve that opens and closes by supplying vacuum and atmospheric pressure. A valve control device,
A vacuum valve opening and closing mechanism for switching between vacuum and atmospheric pressure supplied for opening and closing the vacuum valve,
A reciprocally movable shaft that operates the vacuum valve opening and closing mechanism,
A spring that biases the shaft in a direction to close the vacuum valve,
A first diaphragm and a second diaphragm that can reciprocate integrally with the shaft-like body,
A first chamber and a second chamber for generating a differential pressure on both sides of the first diaphragm to move the shaft in a direction to open the vacuum valve,
A third chamber and a fourth chamber for generating a differential pressure on both sides of the second diaphragm to move the shaft in a direction to open the vacuum valve,
A first magnetic force generator attached to a radially outer side of the shaft-shaped body in the first diaphragm;
The first chamber, the second chamber, the third chamber, and a housing in which the fourth chamber is formed,
The first chamber of the housing is formed and attached to a wall portion facing the first diaphragm, and generates a magnetic force attracting between the first magnetic force generator and the first magnetic force generator approaches. When the vacuum valve is closed, the second magnetic force generator that opens when the vacuum valve opens when separated from the first magnetic force generator,
A moving member that is provided on the wall portion and is movable in the axial direction of the shaft-like body, and that moves the shaft-like body in the axial direction;
Bei to give a,
A plurality of the second magnetic force generators are arranged at intervals around the axis . The first end is disposed between a suction pipe arranged in a sewage basin and a vacuum system for transferring sewage by vacuum suction, and a vacuum for controlling a vacuum valve that opens and closes by supplying vacuum and atmospheric pressure. A valve control device,
A vacuum valve opening and closing mechanism for switching between vacuum and atmospheric pressure supplied for opening and closing the vacuum valve,
A reciprocally movable shaft that operates the vacuum valve opening and closing mechanism,
A spring that biases the shaft in a direction to close the vacuum valve,
A first diaphragm and a second diaphragm that can reciprocate integrally with the shaft-like body,
A first chamber and a second chamber for generating a differential pressure on both sides of the first diaphragm to move the shaft in a direction to open the vacuum valve,
A third chamber and a fourth chamber for generating a differential pressure on both sides of the second diaphragm to move the shaft in a direction to open the vacuum valve,
A first magnetic force generator attached to a radially outer side of the shaft-shaped body in the first diaphragm;
The first chamber, the second chamber, the third chamber, and a housing in which the fourth chamber is formed,
The first chamber of the housing is formed and attached to a wall facing the first diaphragm, and generates a magnetic force attracting between the first magnetic force generator and the first magnetic force generator approaches. When the vacuum valve is closed, the second magnetic force generator that opens when the vacuum valve opens when separated from the first magnetic force generator,
A moving member that is provided on the wall portion and is movable in the axial direction of the shaft-like body, and that moves the shaft-like body in the axial direction;
With
Said second magnetic force generating member, the vacuum valve controller is characterized in that it is formed in a ring shape centering around axis the axis. The first magnetic force generator is an iron plate,
The said 2nd magnetic force generation body is a permanent magnet, The vacuum valve control apparatus of Claim 1 or 2 characterized by the above-mentioned. A vacuum valve control device according to any one of claims 1 to 3 ,
Said suction tube;
Said vacuum valve;
A vacuum valve unit comprising:

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