JP3527621B2 - Vacuum valve - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a vacuum valve suitable for use in a vacuum sewer system or the like.

[0002]

2. Description of the Related Art As described in Japanese Patent Laid-Open No. 3-43527, a vacuum sewer system is designed to allow wastewater discharged from homes, factories, etc. to flow into a wastewater tank of a vacuum valve unit from a naturally flowing wastewater inflow pipe. The sewage collected in the sewage tank is collected by a vacuum sewage pipe in a water collection tank inside the vacuum station, and then sent to a sewage treatment plant by a pressure pump.

A vacuum valve is installed in the vacuum valve unit, and this vacuum valve opens and closes a connecting portion between a suction pipe standing up from the bottom of the dirty water tank and a vacuum sewer pipe communicating with a vacuum source. It is possible. When the water level in the dirty water tank rises above a certain level, open the vacuum valve,
The vacuum pressure of the vacuum sewage pipe is applied to the suction pipe, and the sewage water and air are sucked in order in the sewage tank at the end by the vacuum pressure applied to this vacuum sewage pipe, and the pressure difference between the vacuum pressure in front of the sewage and the suction air pressure behind the sewage. Is used to convey sewage as a gas-liquid multiphase flow.

At this time, the controller part of the vacuum valve has a liquid level detection diaphragm which operates in response to a predetermined liquid level in the dirty water tank and a three-way valve which switches between opening and closing of the vacuum valve. By activating the detection valve via the plunger by movement, a vacuum force is introduced from the vacuum sewer pipe to the pressure control chamber, and the three-way valve is activated by this vacuum force. The vacuum force introduced to the pressure control chamber is released to the atmosphere by the needle valve.

That is, in the conventional opening / closing of the vacuum valve, the liquid level change caused by the accumulation of sewage flowing into the sewage tank is pressure-converted by the liquid level detection pipe in the tank (the amount of water sucked from the suction pipe becomes about 40 liters). The position of the liquid level detection pipe is adjusted as described above), and the compressed air activates the liquid level detection diaphragm of the vacuum valve controller unit to operate the vacuum valve. Also, when closing the vacuum valve, if dirty water is sucked from the suction pipe and the liquid level begins to drop, the detection valve closes when the liquid level drops to a certain level, and after the air timer by the needle valve adjustment setting, the vacuum valve close. Conventionally, it has been standard that the gas-liquid ratio (volume ratio of sucked air and waste water) is set to 3: 1 by adjusting the opening time of the vacuum valve with the needle valve.

[0006]

In the prior art, the opening time of the vacuum valve is adjusted by the needle valve built in the controller, and the extension adjustment range of the opening time is relatively small. Also, the installation of the needle valve complicates the structure of the controller unit.

An object of the present invention is to adjust the opening time of the vacuum valve in a relatively wide range without complicating the structure of the vacuum valve and to optimize the gas-liquid ratio of the air sucked into the vacuum sewer pipe and the waste water. .

[0008]

The present invention according to claim 1 makes it possible to open and close a connecting portion between a suction pipe communicating with a tank and a vacuum sewer pipe communicating with a vacuum source, and opening and closing the connecting portion. A valve body, a valve working chamber accommodating a plunger connected to the valve body, a closing force giving means for giving a closing force to the valve body by being built in the chamber above the plunger of the valve working chamber, in the vacuum valve configured to include a controller unit for applying opening force to the valve body by applying a vacuum to the upper chamber from the plunger, the air to the air conduits being connected to the lower chamber from the plunger of the valve operating chamber A flow rate adjustment device is installed to allow air communication.
One end of the passage is connected to the controller section so that the movement time of the valve body can be adjusted and the movement time of the valve body can be adjusted. ,

[0009] The present invention described in claim 2, further in the present invention as set forth in claim 1, wherein the air flow device comprises providing an air flow control valve and the check valve in parallel, check valve is Only the introduction of air into the lower chamber of the valve working chamber is allowed.

[0010]

According to the present invention described in claim 1, the following (1) to
There is an action of (3). (1) When the vacuum valve is opened, a vacuum pressure is applied to the upper chamber of the valve operating chamber, and the pressure in the upper chamber is reduced, so that [(lower chamber pressure of valve operating chamber-upper chamber pressure) x plunger area> close. The closing force of the force applying means], the valve element connected to the plunger rises and opens, and air is introduced into the lower chamber of the valve operating chamber from the air conducting path connected to the lower chamber. It At this time, adjust the air flow rate provided in the air communication path.
The flow rate of the air introduced into the valve working chamber is controlled by the setting of the regulating device , and as a result, the rise of the valve body can be slowed and the opening operation moving time of the valve body can be delayed and adjusted.

(2) At the time of vacuum valve closing operation, atmospheric pressure is applied to the upper chamber of the valve operating chamber, the valve body is lowered and closed by the closing force of the closing force applying means, and the lower chamber of the valve operating chamber is closed. Air is discharged to the outside from the air conducting path connected to the. At this time, adjust the air flow rate provided in the air communication path.
The flow rate of air discharged from the valve working chamber is controlled by the setting of the regulating device , and as a result, the downward movement of the valve body can be slowed down and the closing operation moving time of the valve body can be delayed and adjusted.

(3) By the above (1) and (2), the opening operation moving time and the closing operation moving time of the valve body can be adjusted in a wide range. In other words, the opening time of the vacuum valve can be adjusted in a relatively wide range, and the controller unit can be configured with a simple configuration in which an air flow rate adjusting device is provided in the air communication path connected to the lower chamber of the valve working chamber. The gas-liquid ratio of the air sucked into the vacuum sewer pipe and the sewage can be optimized without involving a complicated configuration.

The present invention according to claim 2 has the following effects. Considering the actual operation of the vacuum valve unit, during the opening operation of the vacuum valve, there is suction of dirt, and in a state where the degree of vacuum is low, it takes a long time to fully open the valve body,
Slowly increasing the valve body is not preferable because it causes resistance and clogging of the valve body. For this reason, when the vacuum valve is being opened, that is, when air is introduced into the lower chamber of the valve working chamber, air can be introduced from the check valve together with the air flow rate control valve to quickly raise the valve body, and the valve body Improve the suction performance by preventing the resistance and clogging of filth transport. When air is discharged from the lower chamber of the valve working chamber during the closing operation of the vacuum valve, the non-return action of the check valve causes the air to be discharged only from the air flow rate adjusting valve, causing the valve body to slowly descend. It is a thing.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing a vacuum valve unit, FIG. 2 is a schematic diagram showing a vacuum valve, FIG. 3 is a schematic diagram showing a controller section, and FIG. 4 is an air flow rate adjusting device provided in the vacuum valve. FIG. 5 is a schematic diagram showing the air flow rate adjusting device.

As shown in FIG. 1, a vacuum valve unit 10 constituting a vacuum type waste water collecting apparatus has a waste water tank 11 connected to a waste water inflow pipe 12, and a suction pipe 13 communicating with the tank 11 and a vacuum source. It has a vacuum valve 15 capable of opening and closing a connecting portion with the communicating vacuum sewer pipe 14.

That is, the sewage discharged from each home or the like flows into the tank 11 through the natural-flow-type sewage inflow pipe 12. Then, when the dirty water is collected in the tank, the vacuum valve 15 is opened, and the dirty water in the tank 11 is sucked through the suction pipe 13. Then, the sewage is sucked into the vacuum sewer pipe 14 through the vacuum valve 15, collected in the water collecting tank of the vacuum pump station, and then sent to the sewage treatment plant or the like by the pressure pump.

The vacuum valve 15 connects the first and second housings 21 and 22 to the band clamp 2 as shown in FIGS.
It is configured integrally by 3A and has a valve body 24, a valve working chamber 25, a spring 26, and a controller portion 27.

The valve body 24 opens and closes a connecting passage 28 which constitutes a connecting portion between the suction pipe 13 and the vacuum sewer pipe 14.

The valve working chamber 25 slidably accommodates a cup-shaped plunger 30 which is connected to the valve body 24 via a valve rod 29. The upper chamber 25A and the lower chamber 25B partitioned by the plunger 30 of the valve working chamber 25 are
It is partitioned by a rolling diaphragm 30A attached to the.

The spring 26 is provided in the plunger 3 of the valve working chamber 25.
It is built into the upper chamber 25A above 0, exerts a spring force on the plunger 30, and gives a closing force to the valve body 24. The chamber 25B below the plunger 30 of the valve operating chamber 25 is connected to the atmosphere communication pipe 43 via a hose 46 and is at atmospheric pressure.

The controller unit 27 applies a vacuum pressure to the upper chamber 25A of the valve operating chamber 25 when the level of dirty water in the tank 11 rises, and pulls the plunger 30 by the differential pressure between the upper and lower chambers (the lower chamber 25B is atmospheric pressure). By raising the pressure, an opening force is applied to the valve body 24 to open the vacuum valve 15 and bring the vacuum sewer pipe 14 into conduction with the suction pipe 13.

The controller unit 27 applies a vacuum pressure to the valve working chamber 25 to apply an opening force to the valve body 24 when the level of the sewage in the sewage tank 11 rises, and opens the vacuum valve 15 to the suction pipe 13. The vacuum sewer pipe 14 is made conductive.

The controller section 27 is constructed as follows. The controller unit 27, as shown in FIG.
The fifth cylinder-shaped cases 51 to 55 are integrally formed with bolts. Normally, the fourth case 54 is attached to the second housing 22 of the vacuum valve 15 by the band clamp 23B.
Are integrated by.

The controller section 27 has a water level detection tube connection port 56 to which a water level detection tube 37 communicating with the sewage tank 11 is connected via a hose 38. The water level detection pipe connection port 56 is connected to the first case 51 via a diaphragm 59. A small through hole is provided in the diaphragm 59 so that pressure can be transmitted.

The controller section 27 has a vacuum pressure connection port 57 to which the vacuum sewer pipe 14 is connected via a hose 41.
Is provided in the third case 53.

Further, the controller section 27 has an atmospheric pressure connection port 58 to which the atmosphere communication pipe 43 is connected via a hose 44.
Is provided in the third case 53.

The first case 51 and the second case 52 are connected via a water level detection diaphragm 60. A push button composed of a plunger 61, a spring 63, and an elastic cover 62 is provided on the upper part of the first case 51 so that the water level detection diaphragm 60 can be manually displaced. The second case 52 has a plunger 65 under the diaphragm 60.
However, it is provided so as to reach the detection valve 68 installed in the third case 53. A shaft seal such as an O-ring 67 is provided around the insertion portion of the plunger 65 into the chamber 83 so that air does not leak into the upper chamber 83 as a pressure control chamber formed by the second case 52 and the third case 53. It is provided.

The detection valve 68 is arranged in the chamber 83 and is operated by the plunger 65, so that the vacuum force can be introduced into the chamber 83. That is, the third case 53 is provided with a passage 57A communicating with the vacuum pressure connection port 57 to which the vacuum sewer pipe 14 is connected via the hose 41, and the detection valve 68.
The opening of the passage 57A to the room 83 can be opened and closed. The detection valve 68 is provided with a tongue piece capable of closing the opening of the passage 57A at the tip of the leaf spring, and when the leaf spring is elastically pushed by the plunger 61, the tongue piece is separated from the opening of the passage 57A to open the opening. When opened, the vacuum force can be introduced into the room 83. Incidentally, 66 is a return spring of the plunger 65.

Valve seats 72 and 73 are provided in the fourth case 54 and the fifth case 55, and an upper chamber 85 of the fourth case 54 is provided.
Communicates with the atmosphere through the passage 92, and the fifth case 5
The lower chamber 87 of 5 communicates with the vacuum pressure connection port 57 to which the vacuum sewer pipe 14 is connected via the hose 41 through a passage 91. Lower part of fourth case 54 and fifth case 5
The chamber 86 formed in the upper part of 5 communicates with the working chamber 25 of the vacuum valve body through the passage 96. Both valve seats 72, 73
The valve element 71 provided between the two functions as a three-way valve so as to guide either the atmosphere or the vacuum to the chamber 86 by moving up and down. The valve body 71 is connected to a three-way valve diaphragm 70 provided between the third case 53 and the fourth case 54, and a compression spring 69 is provided above the diaphragm 70 and is pressed against the valve seat 73 of the fifth case 55. Has been. Third
A partition is provided in the case 53, but the communication port 8 is partially provided in the case 53.
8 is provided so that the vacuum pressure applied to the upper chamber 83 when the detection valve 68 is activated and opened is communicated to the lower chamber 84. Further, the atmosphere enters the upper chamber 83 of the third case 53 through the passages 93 and 94.

However, in the present embodiment, as shown in FIGS. 2, 4 and 5, an air flow rate adjusting device is provided in the air communication path (hose) 46 connected to the lower chamber 25B of the valve operating chamber 25 of the vacuum valve 15. 100 is provided. Air flow controller 10
In No. 0, an air flow rate adjusting valve 101 and a check valve 102 are provided in parallel in the air communication path 46. Air flow control valve 101
Adjusts the flow rate of air introduced into the lower chamber 25B during the opening operation of the vacuum valve 15 so that the opening operation moving time of the valve element 24 can be adjusted, and from the lower chamber 25B during the closing operation of the vacuum valve 15. It is possible to adjust the closing operation moving time of the valve body 24 by adjusting the discharge flow rate of the air. The check valve 102 blocks the discharge of air from the lower chamber 25B and allows only the introduction of air to the lower chamber 25B.

The controller section 27 of the vacuum valve operates as follows. When the water level in the sewage masu 11 rises, the water level detection pipe 3
7, the air pressure in the hose 38 and the water level detecting diaphragm upper chamber 81 rises, and the water level detecting diaphragm lower chamber 82 communicates with the atmosphere, so that the water level detecting diaphragm 60 having a pressure difference is displaced downward.

The plunger 65 provided in the lower portion of the water level detecting diaphragm 60 is pushed by the displacement of the diaphragm 60 and is displaced downward so that the detecting valve 68 provided in the upper chamber 83 of the third case 53 is pushed downward to be opened.

By operating the detection valve 68, the vacuum sewer pipe 1
The vacuum pressure of No. 4 is applied to the third case chambers 83 and 84 through the hose 41 and the vacuum pressure connection port 57, and the lower chamber 85 of the three-way valve diaphragm 70 communicates with the atmosphere, so that a pressure difference is generated. The diaphragm 70 is pulled up. Along with this, the valve body 71 also rises and the valve seat 73 of the fifth case 55 rises.
To the valve seat 72 of the fourth case 54 from the vacuum sewer pipe 1
The vacuum pressure of No. 4 is applied to the chamber 86 via the hose 41 and the vacuum pressure connection port 57, thereby applying the vacuum pressure to the upper chamber 25A of the working chamber 25 of the vacuum valve body. At the same time, the valve working chamber 25
The atmospheric pressure is introduced into the lower chamber 25B through the air flow rate adjusting valve 101 and the check valve 102 of the air flow rate adjusting device 100 provided in the hose 46. As a result, the vacuum valve 15 is opened, and the waste water in the waste water tank is discharged to the vacuum sewer pipe 14.

When the liquid in the sewage masu is discharged, the water level is lowered, and the pressurization of the water level detection diaphragm 60 is lowered,
It is pushed back by the spring 66 provided on the plunger 65, and the detection valve 68 is closed in the initial state accordingly.

The vacuum in the chamber 83 of the third case 53 is introduced into the atmosphere through the passages 93 and 94, so that there is a slight time lag and the atmosphere becomes an atmospheric state, and the pressure difference between the two sides of the three-way valve diaphragm 70 disappears. The spring 69 pushes it back to its original state, the valve body 71 also closes the original valve seat 73 of the fifth case 55, and the upper chamber 25A of the working chamber 25 of the vacuum valve body is closed.
The room 86 leading to the room is brought to the atmospheric state. At the same time, the air in the lower chamber 25B of the valve working chamber 25 is discharged from the air flow rate adjusting valve 101 of the air flow rate adjusting device 100 provided in the hose 46. As a result, the vacuum valve body is closed.

The operation of this embodiment will be described below. When the vacuum valve 15 is opened, the upper chamber 25 of the valve working chamber 25
A vacuum pressure is applied to A, and the decompression of the upper chamber 25A causes [(pressure of lower chamber 25B of valve operating chamber 25-upper chamber 25A
Pressure) × area of plunger 30> closing force of spring 26]
Then, the valve body 24 connected to the plunger 30 rises and opens, and the lower chamber 25 of the valve working chamber 25
Air is introduced into the lower chamber 25B from a hose 46 connected to B. At this time, the flow rate of air introduced into the valve working chamber 25 is controlled by setting the air flow rate adjusting valve 101 provided in the hose 46, and as a result, the rise of the valve body 24 is slowed down and the opening operation moving time of the valve body 24 is slowed down. The delay can be adjusted.

When the vacuum valve 15 is closed, the valve working chamber 25
The atmospheric pressure is applied to the upper chamber 25A of the
The closing force lowers and the closing operation is performed, and air is discharged to the outside from the hose 46 connected to the lower chamber 25B of the valve operating chamber 25. At this time, the valve working chamber 2 is set by setting the air flow rate adjusting valve 101 provided on the hose 46.
The air discharge flow rate from the valve 5 is controlled, and as a result, the valve body 24
It is possible to delay adjustment of the closing operation movement time of the valve body 24 by slowing down the fall of the valve.

By the above, the opening operation moving time and the closing operation moving time of the valve body 24 can be adjusted in a wide range.
In other words, the opening time of the vacuum valve 15 can be extended and adjusted in a relatively wide range, and the hose 46 connected to the lower chamber 25B of the valve working chamber 25 is provided with the air flow rate adjusting valve 101, which is a simple structure. The gas-liquid ratio of the air sucked into the vacuum sewer pipe 14 and the sewage can be optimized without involving a complicated configuration of the controller unit 27.

Considering the actual operation of the vacuum valve unit 10, when the vacuum valve 15 is opened, there is suction of dirt,
Further, in a state where the degree of vacuum is low, it takes a long time to fully open the valve body 24. Therefore, slowing the rise of the valve body 24 is preferable because the valve body 24 causes resistance or clogging of dirt. Absent. Therefore, when the vacuum valve 15 is opened,
At the time of air conduction to the lower chamber 25B of the valve working chamber 25, air can be introduced from the check valve 102 together with the air flow rate adjusting valve 101 to promptly raise the valve body 24, so that the valve body 24 resists conveyance of filth. Prevents clogging and improves suction performance. When the vacuum valve 15 is being closed, that is, when the air is discharged from the lower chamber 25B of the valve working chamber 25, air is discharged only from the air flow rate adjusting valve 101 due to the check function of the check valve 102. 24 is slowly lowered.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration of the present invention is not limited to this embodiment, and the design can be changed without departing from the gist of the present invention. Etc. are included in the present invention. For example, the vacuum valve 15 described above can be modified as follows.

(1) The air flow rate adjusting device 100 has only the air flow rate adjusting valve 101 and does not have the check valve 102.

(2) A needle valve is provided in the passage 93 for releasing the vacuum force introduced into the upper chamber 83 as the pressure control chamber of the vacuum valve 15 to the atmosphere. According to this, the opening time of the vacuum valve 15 can be widely adjusted by the air flow rate adjusting device 100 described above, and can be finely adjusted by the needle valve.

[0043]

As described above, according to the present invention, the opening time of the vacuum valve can be adjusted in a relatively wide range without complicating the structure of the vacuum valve, and the air-liquid ratio of the air sucked into the vacuum sewer pipe and the waste water can be adjusted appropriately. Can be realized.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a vacuum valve unit.

FIG. 2 is a schematic diagram showing a vacuum valve.

FIG. 3 is a schematic diagram showing a controller unit.

FIG. 4 is a schematic diagram showing an air flow rate adjusting device provided in a vacuum valve.

FIG. 5 is a schematic diagram showing an air flow rate adjusting device.

[Explanation of symbols]

11 Tank 13 Suction Pipe 14 Vacuum Sewage Pipe 15 Vacuum Valve 24 Valve Body 25 Valve Working Chamber 25A Upper Chamber 25B Lower Chamber 26 Closing Force Applying Spring 27 Controller Section 30 Plunger 4 6 Hose (Air Conducting Path) 100 Air Flow Rate Regulator 101 Air Flow control valve 102 Check valve

Claims (2)

(57) [Claims] 1. A valve body that opens and closes a connecting portion between a suction pipe communicating with a tank and a vacuum sewer pipe communicating with a vacuum source, and a plunger connected to the valve body. The valve working chamber to be housed, the closing force applying means which is built in the upper chamber from the plunger of the valve working chamber and gives a closing force to the valve body, and the valve body which applies a vacuum pressure to the upper chamber from the plunger of the valve working chamber. In a vacuum valve configured to have a controller unit that applies an opening force to an air passage, an air flow rate adjusting device is provided in an air passage connected to a chamber below the plunger of the valve operating chamber, and one end of the air passage is Previous
A vacuum valve, characterized in that it is connected to the controller unit and the movement time of the valve body can be adjusted. Wherein said air flow device comprises providing an air flow control valve and the check valve in parallel, check valve is made as acceptable only introduction of air into the lower chamber of the valve operating chamber according Item 1
Vacuum valve described.