JPH0637787B2 - Valve controller - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a valve controller for controlling opening / closing of a control valve provided in a discharge pipe of a vacuum sewage transfer system.

[Prior Art] In comparison with a commonly used gravity flow type waste water transfer system, a vacuum type waste water transfer system requires some power for its operation. In addition to this, the vacuum type sewage transfer system is different from the simple drop type sewage transfer system in which the mechanism is simple, and the operation of the control mechanism is complicated, and high processing accuracy is required for its manufacture. However, the free fall type sewage transfer system and the positive pressure type sewage transfer system are not cost effective at all of the various usage points.

Here, the development of the control valve and control mechanism used in the vacuum-type wastewater transfer technology has improved the vacuum-type wastewater transfer system, increased its reliability, and reduced the cost required to install and maintain the system. In recent years, there has been an increasing demand for a reduction in power for operating the vacuum type waste water transport system. Along with this, many techniques have been proposed for the vacuum type waste water transfer system and its control means.

[Problems to be Solved by the Invention] However, the mechanism of these proposals is very complicated,
There was a problem in terms of practicality. Further, when the installation location of the sewage transport system is hot and humid, or when it is often exposed to low temperatures to generate a condensate, the reliability of the system becomes low, which causes a problem such as malfunction.

Here, U.S. Pat. No. 4,373,838 shows a sensor / controller module that solves the above problem. However, in this module, the liquid level of the storage tank upstream of the control valve rises and the sensor / controller module is When the control valve should be opened, there is a problem in that an accurate operation cannot be guaranteed. That is, with only the orifice of the atmospheric pressure pipe in the sensor controller module of US Pat. No. 4,373,838,
When opening the control valve, the series of actions of raising the valve lever of the valve provided in the second sensor chamber to raise the pressure in the first controller chamber to atmospheric pressure may not be performed accurately.

The present invention has been proposed in view of the above-mentioned problems of the conventional art, and an object thereof is to provide a valve controller that is preferably used in a vacuum type waste water transfer system and does not cause a malfunction.

[Means for Solving the Problems] A valve controller of the present invention is a valve controller that controls opening and closing of a control valve interposed in a discharge pipe of a vacuum sewage transfer system. A pressure sensor having a pressure sensor valve that communicates with the storage tank and opens and closes in response to a predetermined pressure in the storage tank, a three-way valve that switches between an open position and a closed position of the control valve, and opening and closing of the pressure sensor valve. A duck bill having an orifice is provided in an atmospheric pressure pipe for introducing atmospheric pressure into a sensor chamber provided with a pressure sensor valve.

Here, the pressure sensor includes a first sensor chamber having a sensor port communicating with a storage tank, a second sensor chamber having a pressure sensor valve, a diaphragm partitioning the first and second sensor chambers, and a pressure plate. It is preferable to include and.

Further, the differential pressure response means is arranged around a first controller chamber in which a port opened and closed by a pressure sensor valve is formed and a dip tube is opened, and a rod of a three-way valve penetrates and around the rod. Preferably, it includes a second control chamber containing a compression spring, a diaphragm and a pressure transfer plate to which the end of the rod is attached and which separates the first and second control chambers.

In carrying out the present invention, it is preferable to dispose an air filter in the atmospheric pressure pipe.

Further, in order to connect the controller chamber communicating with the vacuum port communicating with the vacuum side of the discharge pipe of the vacuum sewage transfer system and the first and second controller chambers, respectively,
The controller chamber communicating with the vacuum port preferably includes a two-port plate to which a two-tube mounting adapter is attached. An umbrella-shaped check valve is preferably provided in the controller chamber communicating with the vacuum port.

Furthermore, in order to properly seal the rod of the three-way valve,
Seals are preferably provided on both the side facing the second controller chamber and the side facing the controller chamber communicating with the vacuum port.

Here, it is preferable that the rod of the three-way valve is formed with a groove portion that functions as a passage for the vacuum pressure and the fluid. It is preferable that a fluorosilicone compound is used as the lubricant of the rod, and that the lubricant is applied to the area in contact with the seal.

Also, a counting mechanism for counting the number of operation cycles of the valve controller is preferably connected via a pipe adapter.

Further, it is preferable that no orifice is formed in the sensor port.

Further, it is preferable that a surge suppressor is interposed in the sensor pipe that connects the sensor port and the storage tank.

The valve controller of the present invention includes a sewage storage tank, a discharge pipe having one end connected to the storage tank and the other end connected to a collection station for transporting sewage from the storage tank to the collection station, and the storage tank and the collection station. Control valve for selectively controlling the transfer of wastewater from the storage tank to the collection station, and a means for maintaining the pressure in the discharge pipe between the storage tank and the collection station at a low pressure or a vacuum pressure. The control valve is operated by a differential pressure applied to the control valve to selectively open and close the discharge pipe to selectively convey waste water from the storage tank to the collection station, and to open and close the control valve and the discharge pipe. A differential pressure actuation device for controlling the transfer of wastewater from the storage tank to the collection station to control the differential pressure operation. The device includes pressure sensor means at one end in pressure communication with the storage tank, the pressure sensor means being closed to prevent fluid flow therethrough and disposed between the control valve and the control valve. The pressure sensor means is in pressure communication with the control valve through the differential pressure responsive element and includes means for alternately communicating the differential pressure responsive element with a low pressure or vacuum and relatively high pressure source in the discharge line. Further, the pressure sensor means detects the pressure fluctuation due to the fluctuation of the liquid level in the storage tank and operates the differential pressure response element in response to the predetermined pressure in the storage tank to open the discharge pipe to open the storage tank. By allowing the transfer of wastewater to the collecting station, and in response to other predetermined pressures in the storage tank, the differential pressure responsive element operates in the opposite manner to control the Vacuum pressure including means for closing the valve and means for maintaining a state of the pressure sensor means such that fluid is not in communication through the pressure sensor means for continuous transfer of sewage in response to pressure. It is preferably used in wastewater transport systems.

Here, it is preferable that the vacuum type waste water transfer system is provided with means for automatically discharging the condensate. And, the means for automatically discharging the condensate preferably includes a condensate discharge element that operates continuously and a condensate discharge element that operates intermittently.

Further, it is preferable that the vacuum type waste water transfer system is provided with means for controlling continuous operation intervals of the differential pressure response element. The vacuum wastewater transfer system is then preferably provided with various means for controlling the successive actuation intervals of several differential pressure responsive elements.

Further, the means for alternately communicating the differential pressure responsive element of the vacuum type waste water transfer system with a low pressure or vacuum pressure and a relatively high pressure source in the discharge pipe ensures that the pressure sensor means and the differential pressure responsive element operate. It is preferable to provide a pressure communication operating means for preventing an unexpected cycle of the differential pressure actuator.

[Operation] According to the present invention having the above-described configuration, since the duck bill having the orifice is interposed in the atmospheric pressure pipe for introducing atmospheric pressure into the sensor chamber provided with the pressure sensor valve, the storage tank When the flow surface rises and the pressure sensor valve is opened, the amount of air flowing from the atmospheric pressure pipe into the sensor chamber provided with the pressure sensor valve is limited. as a result,
The diaphragm and the pressure plate forming the pressure sensor are displaced toward the sensor chamber, and the valve lever of the pressure sensor valve is further pressed to fully open the pressure sensor valve. When the pressure sensor valve is fully opened, the duck bill is also fully opened, and the pressure in the first controller chamber of the differential pressure response means is quickly raised to atmospheric pressure.

Furthermore, since the orifice of the duckbill allows the air to flow backward from the sensor chamber to the atmospheric pressure pipe, the pressure in the sensor chamber does not become higher than necessary, and the diaphragm and pressure plate are easily displaced to the sensor chamber side. Become.

In the present invention, by disposing an air filter in the atmospheric pressure pipe, it is possible to prevent particles of impurities from entering the sensor chamber, so that no post-operation occurs.

Further, in order to connect the controller chamber communicating with the vacuum port communicating with the vacuum side of the discharge pipe of the vacuum sewage transfer system and the first and second controller chambers, respectively,
If the controller chamber communicating with the vacuum port is equipped with a 2-port plate to which a 2-tube mounting adapter is attached, the processing and assembly of parts can be facilitated.

By providing an umbrella-shaped check valve in the controller chamber communicating with the vacuum port, even if the vacuum pressure of the discharge pipe drops when the discharge pipe is opened by the control valve, the valve controller is isolated from the drop in the vacuum pressure. Thus, the opening and closing timing of the control valve can be made constant.

Further, if the seal is provided on both the side facing the second controller chamber and the side facing the controller chamber communicating with the vacuum port, the rod of the three-way valve can be suitably sealed. That is, by providing seals on both,
Fluid (air) does not leak even if the pressure in either controller chamber becomes higher than the other.

Here, if a groove that functions as a passage for vacuum pressure and fluid is formed in the rod of the three-way valve, processing is easier than forming a slot. Further, by forming the groove portion, the vacuum pressure and the cross-sectional area of the fluid passage can be increased, and the friction with the seal portion or the like can be reduced.

In addition to this, if a surge suppressor is installed in the sensor pipe that connects the sensor port and the storage tank, malfunction of the controller due to air flowing to the storage tank when the control valve suddenly closes the discharge pipe is prevented. it can.

[Example] As shown in Fig. 1, the above-mentioned system is provided with a free-flowing sewage pipe 1 at atmospheric pressure, and the sewage pipe 1 discharges sewage from a place where sewage is generated in a house. Natural sulfur sewer pipe 1
Are arranged so as to convey the dirty water to the storage tank 2. The storage tank is normally maintained at the atmospheric pressure, like the natural drainage sewer 1. A sensor pipe 3 is supported near the top of the storage tank 2, and the sensor pipe extends to a position above the inlet opening 4 of the storage tank discharge pipe 5. The sensor pipe 3 extends from a top support portion, which is generally located at the side of the valve pit indicated by reference numeral 6, and the sensor pipe 3 is open inside the valve pit.

The storage tank discharge pipe 5 extends from the storage tank 2 into the valve pit 6. Inside the valve pit 6, a control valve, which is generally designated by 10, is provided in the storage tank discharge pipe 5. Details of the construction and operation of control valve 10 are set forth in US Pat. No. 4,171,853 to Cleaver et al. In operation of the vacuum fouling system in which the present invention is used, valve 10 is normally closed. Control bubble 10 of discharge pipe 5
In the downstream region, the pressure inside the pipe is maintained at low pressure or vacuum pressure. The vacuum portion of the drain tube 5 between the collection station and the control valve of the type as shown and described in US Pat. No. 4,179,371, together with the collection station 12 shown in FIG. A low pressure state or a vacuum state is maintained.

During the operation of this system, sewage is discharged from the source in the house into the natural flowing sewer pipe 1, and further discharged from the natural flowing sewer pipe to the storage tank 2. When the inside of the storage tank 2 is in a predetermined pressure state, that is, when the waste water, which is the content of the storage tank 2, can be discharged, the control valve 10 is opened by the valve controller described later. The control valve 10 is opened by the discharge pipe 5
A pressure difference is generated between a portion having a relatively low pressure or a vacuum portion downstream of the valve 10 and a portion having a relatively high pressure or an atmospheric pressure portion upstream of the valve 10 of the discharge pipe 5. Due to this differential pressure, the storage tank 2
The waste water, which is the content of the above, is rapidly discharged through the inlet opening 4 of the discharge pipe 5, passes through the control valve 5, flows through the vacuum portion of the discharge pipe 5, and is discharged to the collection station 12. When the drainage of the wastewater from the tank 2 through the drain pipe 5 is completed, the control valve 10 is automatically closed, and the vacuum wastewater transfer system in which the present invention is used returns to the normal atmospheric condition.

Referring to FIG. 1, the control valve 10 is equipped with an integrated valve controller, generally indicated at 15, the details of which are shown in the cross-sectional views of FIGS. 2 and 3. The arrangement of the valve controller 15 with respect to the upper end of the valve 10 is best shown in FIG. 1, where the valve controller 15 is attached to the upper end 11 of the valve 10 by a bracket 16.
Moreover, it is shown in FIGS. 2 and 3 that the screw 17 fixes the bracket.

The pressure sensor pipe 18 is arranged so that the pressure of the sensor pipe 3 is transmitted to one end thereof, and the other end thereof is connected to the pressure sensor port 21, and the pressure sensor port is located at the lowermost part of the valve controller 15. ing. Vacuum is supplied to the valve controller via a vacuum line 24 coupled to a surge tank 27, which surge tank is described in detail in U.S. Pat. No. 4,171,853.
The surge tank 27 communicates with the vacuum portion of the discharge pipe 5, so that a constant low pressure or vacuum is supplied to the valve controller 15 via the vacuum line 24 and the vacuum port 30. The atmospheric pressure is supplied to the valve controller 15 from above the surface of the earth via an air breather indicated by reference numeral 33, and the air breather is communicated with an atmospheric pressure pipe 36, and as shown in FIGS. Supplies atmospheric pressure to the valve controller via the atmospheric pressure port 39. As shown in FIGS. 2 and 3, the valve controller 15 is in communication with the valve 10 operated by the differential pressure via the valve connector 42, which is connected to the upper end 11 of the valve 10. The valve connector port 45 of the valve controller 15 is arranged in such a manner that it is in pressure communication. The structure and operation of the valve connector 42 and the control valve 10 operated by differential pressure are described in US Pat. No. 4,171,853.

The valve controller 15 is preferably an impact resistant A.V.
B. S. Manufactured from (acrylonitrile, butadiene and styrene) resins. The controller comprises a generally cylindrical housing 48 which is generally cylindrical and is molded by an assembly of axially aligned molding elements 51, 54, 57, 60, 63. There is. The molding element assembly is axially secured by a series of radially aligned through bolts 66, and an annular seal 69 between the molding elements maintains fluid tightness.

The sensor port 21 opens into a first sensor chamber 75, which sensor chamber 75 has a wall 7 of a cylindrical molding element 51.
8 and a flexible diaphragm 81, which is made of nitrile or other suitable elastic material. The diaphragm 81 is joined to the pressure plate 84, and the pressure plate extends in the second sensor chamber 87 substantially in the axial direction. The diaphragm 81 effectively seals the sensor chambers 75, 87 against fluid flow and conversion after the valve controller is assembled.

A base plate 90 is secured to the wall 93 of the molding element 54 by means of two screws 96. 10 on the base plate 90
2, a valve lever 99 is pivotally supported, the valve lever carrying a nylon valve bulb 105, which closes a flexible nitrile elastomeric valve seat 108 at port 111. , Where port 111 is located at the bottom of housing 48. The port 111 is substantially axially aligned with the sensor port 21. A torsion spring 114 is attached to the valve support 99 and the base plate 9 at the shaft support mounting point 102.
0, and the torsion spring normally biases the valve lever 99 and the base plate 90 away from each other so that the valve ball 105 is seated (on the valve seat). The normal standby state shown in the figure is set.
The second sensor chamber 87 communicates with the atmosphere via the atmospheric pressure pipe 117. Since the valve ball portion 105 and the valve seat 108 are closed as shown in FIG. 2 in the standby state, the atmospheric pressure of the second sensor chamber 87 is maintained, and in the standby state air and Prevents fluid from entering.

When the valve ball portion 105 and the valve seat 108 are opened, the port 111 brings the second sensor chamber 87 and the first controller chamber 120 into fluid communication. The dip tube 123 is passed through the annular wall 126 of the housing 48.
The dip tube extends downward in the first controller chamber 120, and projects and opens just above the lowermost portion of the annular wall 126.

A diaphragm 129 made of a flexible nitrile elastic material is provided on the opposite side of the wall 93 in the first controller chamber 120,
The diaphragm forms with the wall 135 of the forming element 57 a second controller chamber 132. A rod 138 having a generally cylindrical shape is fixed to a diaphragm 129 by a screw 139, and the screw is attached to the diaphragm 12
9 and the pressure transfer plate 140, and is screwed to one end of the rod 138. As shown in FIGS. 2 and 3, rod 138 extends laterally from diaphragm 129 substantially aligned with the axis of housing 48 and extends through opening 141 and seal 210 provided in wall 135. And the seal is attached to the wall 13 by three screws 143.
It is stuck to 5. As shown in FIG. 3, rod 138
A fluid seal 144 is provided so that fluid or pressure does not leak from the second controller chamber 132 through the opening 141 penetrating therethrough. The compression spring 147 is fitted on the rod 138, and
The thrust plate 150 and the pressure moving plate 123 are urged so as to maintain 9 in the normal standby position shown in FIG.

Another controller chamber 153 is formed so as to face the second controller chamber 132 with the wall 135 interposed therebetween, and this controller chamber 153 is opened to the vacuum line 24 via the vacuum port 30, and the vacuum line is exhausted. It communicates with the vacuum side of the tube 5. As shown in FIG. 2, the rod 138 is formed with a groove portion 212 penetrating in the radial direction thereof. In the standby position shown in FIG. 2,
The groove 212 is housed in the controller chamber 153 to prevent vacuum or low pressure from leaking from the controller chamber 153.

The wall 159 of the molding element 6 defines the end wall of the controller chamber 153 and the wall of the chamber 162. This chamber 162 receives the distal end of rod 138, which carries a three-way valve head 165. The chamber 162 is provided with a pair of three-way valve seats 168, 171 which are coaxially aligned with the rod 138 and the three-way valve head 165. In the standby condition shown in FIG. 2, the valve head 165 engages the left valve seat 168 to prevent the controller chamber 153 from being in pressure communication with the chamber 162 and the valve connector port 45. The valve seat 171 is coaxially aligned with the atmospheric pressure port 39 and remains open in the standby state of FIG.
And the valve connector port 45.

Atmospheric pressure pipe 117 has an atmospheric pressure port 39 at opening 174.
Is in communication with. In order to control the movement of air passing through the atmospheric pressure pipe 117, an orifice 177 is provided inside the atmospheric pressure pipe adjacent to the opening 174. The orifice 177 preferably has a diameter of 0.16 cm (0.063 inch). Further, the control of the flow of air flowing through the chambers 87, 120, 132, 153 and the communication of pressure and the speed of homogenization in the chamber is performed by a dip tube 123, which is a variable needle adjustable by a screw. It is coupled to valve 180. By adjusting the needle valve 180, the flow velocity of the fluid in the dip tube 123 and the first controller chamber 120 is changed. The fluid communication between the first controller chamber 120 and the controller chambers 132 and 153 is performed via the dip tube 123 and the connection tube 183.

The needle valve 180 and the connecting tube 183 are integrally enclosed by a housing 198, and the housing 198 is fixed to the cylindrical housing 48 of the valve controller 15. The housing 198 has a lid 2 for snap-fitting.
Since it is opened and closed by 01, the internal member can be easily touched.

In normal operation, when there is a pressure of 10.2 cm (4 inches) or less of water at the pressure sensor port 21, the sensor controller module 15 remains in the standby state shown in FIG. The differential pressure between the atmospheric pressure in the second sensor chamber 87 and the low pressure or vacuum pressure in the first controller chamber 120, and the torsion spring 114.
Thus, the valve ball portion 105 and the valve seat 108 are in a sealed state as shown in the figure. As a result, there is no airflow between the sensor portion and the controller portion of the valve controller 15. In addition to this, when the valve controller 15 is operated, no fluid flows between the first sensor chamber 75 and the second sensor chamber 87. Therefore, even if the atmospheric pressure port 39 remains open during the standby state of the valve controller, by restricting the air or fluid passing through the second sensor chamber 87 in the operating mode of the module, the standby state Energy savings can be realized by blocking the air or fluid flowing through the module.

Sewage collects in the storage tank 2, and the pressure sensor port 21 is passed through the sensor pipe 3 to the pressure sensor port 21 by gauge pressure.
When a pressure (about 4.5 inches) is applied, the pressure in the first sensor chamber 75 increases, and the pressure plate 84 carried by the diaphragm 81 is urged to engage with the valve lever 99. In other words, the pressure plate 84 pushes against the torsion spring 114 so that the valve lever 99 pivotally rotates about 102, and lifts the valve ball 105 from the valve seat 108, as shown in FIG. As a result, the second sensor chamber 87 and the first controller chamber 12
The fluid communication state and the atmospheric pressure communication state are set between 0 and 0, and at the same time, the orifice 177 and the atmospheric pressure port 39 are set.
Atmospheric pressure introduced into the second sensor chamber 87 from the atmospheric pressure pipe 117 through the opening 174 of the above enters the first controller chamber 120 through the valve seat 108 and the port 111.

Orifice 177 of atmospheric pressure pipe 117 and duckbill 2
04 is designed to momentarily bring the inside of the second sensor chamber 87 into a vacuum state when the valve ball portion 105 is lifted in response to an increase in pressure in the storage tank 2. This ensures that the atmospheric pressure is introduced into the first controller chamber 120 if the valve ball portion 105 is reliably lifted. In addition to this, the second sensor chamber 87 is provided with the second sensor chamber 87 in order to allow the above-mentioned members operated by the differential pressure to continuously operate and to repeat the cycle when the above-described cycle is completed. Vacuum is not generated, valve bulb part 1
The opening and closing of 05 and the valve seat 108 are surely repeated.

When the atmospheric pressure is introduced into the first controller chamber 120 and the internal pressure thereof becomes lower than or lower than the vacuum pressure, the diaphragm 129 and the first controller chamber 1
Due to the differential pressure between 20 and the second controller chamber 132, the diaphragm 129 and the rod 138 move to the right position as shown in FIG.

When the rod 138 moves to the right, the three-way valve head 16
5 separates from the three-way valve seat 168 and sits on the three-way valve seat 171. And the three-way valve head 165
The three-way valve seat 171 closes the atmospheric pressure port 39 so that the atmospheric pressure is maintained in the chamber 162, the valve connector port 45,
It acts to prevent introduction into the valve connector 42. As shown in FIG. 3, the groove portion 212 formed in the rod 138 is formed in the controller chamber 153 and the chamber 1.
62 to provide pressure and fluid communication therewith, thereby creating vacuum line 24 and vacuum port 30.
Low pressure or vacuum pressure is introduced into the chamber 162. Since the atmospheric pressure communicating with the control valve 10 via the valve connector 42 and the valve connector port 45 is reduced due to the influence of the low pressure or the vacuum pressure from the controller chamber 153, as described in US Pat. No. 4,179,371. The control valve 10 is activated.
Then, the low pressure or the vacuum pressure acts on the control valve 10 in the activated state, the control valve opens the drain pipe 5, and introduces the waste water, which is the content of the storage tank 2, into the drain pipe through the inlet opening 4. Excuse me. Since the pressure in the storage tank 2 is atmospheric pressure, a differential pressure is generated between the low pressure or the vacuum pressure on the downstream side of the control valve 10, and the differential pressure promptly discharges the waste water into the discharge pipe and the collecting station. Transfer to 12 promptly.

The discharge of dirty water from the storage tank 2 causes a pressure drop,
The pressure drop affects the sensor diaphragm 81 via the sensor pipe 3. As a result, the member operated by the differential pressure of the valve controller in which the valve controller of the present invention is used starts the operation opposite to that described above.

The pressure drop affecting the diaphragm 81 acts on the pressure plate 84 to separate it from the lever 99, which causes the valve bulb 105 to be biased onto the valve seat 108 by the torsion spring 114, closing the port 111. , To prevent atmospheric pressure from being introduced into the first controller chamber 120. On the other hand, the chamber 15 communicated with the groove 212
The vacuum degree of 3,162 is reduced. At the same time as the pressures in the first and second controller chambers 120 and 132 are equalized, the diaphragm 129 and the rod 138 are moved to the left by the action of the compression spring 147. With the leftward movement of the rod 138, the three-way valve head 165 separates from the three-way valve seat 171, and the atmospheric pressure port 39 reopens into the chamber 162. Then, the atmospheric pressure is introduced again through the valve connector port 45 and the valve connector 42. Due to this pressure change, the control valve 10 is closed. First and second controller chamber 12
Due to the uniform pressure of 0 and 132, the three-way valve head 1
65 sits on the three-way valve seat 168 to close the controller chamber 153 and prevent low pressure or vacuum pressure from being introduced into the chamber 162. Here, the controller room 120,
The pressure of 132 and 153 becomes uniform with the vacuum pressure in the discharge pipe 5.

The operation of wastewater transfer systems is typically performed at relatively low temperatures and high humidity, resulting in frequent condensation and air exchange in components exposed to low temperatures. Therefore, when the valve controller 15 is installed as shown in FIG. 1, the sensor port 21 is located at the lowermost end of the controller. With this position setting,
The condensate generated in the sensor chamber 75 flows freely from the sensor chamber into the sensor pipe 3, and the deposits in the pipe are discharged while discharging the contents of the storage tank 2. The sensor port 21 not only acts as a drain for condensate but also controls the valve 10 during the drain cycle.
Prevents the sensor member from abruptly moving and the air flow into the storage tank 2 when the sensor suddenly moves to the closed position,
Also acts.

Condensate may also be generated in the second sensor chamber 87 into which the atmospheric pressure is introduced via the atmospheric pressure port 39, the opening 174, the orifice 177, and the atmospheric pressure pipe 117. Therefore, when the valve controller 15 is installed as shown, the port 111 is arranged so as to be located at the lowermost end of the controller, and the condensate is removed from the second sensor chamber 87 while the control valve is in the operating state. It is allowed to flow into the first controller chamber 120. First controller room 120
The condensate accumulated in the controller chamber and the condensate that has flowed into the controller chamber through the port 111 are
23, the needle valve 180, the connecting tube 183, the controller chamber 153, and the vacuum port 30 are intermittently discharged from the first controller chamber 120 to the discharge pipe 5. This intermittent discharge is automatically performed at the same time when a pressure difference is generated between the controller chambers 120 and 153 due to the opening of the port 11. The high pressure or vacuum pressure generated in the first controller chamber 120 via the port 111 is
Through the dip tube 123, the condensate accumulated in the chamber is conveyed and pressed to the controller chamber 153 of low pressure or vacuum pressure.

In the operation of the valve controller, the sensor port 21 continuously discharges the condensate from the first sensor chamber 75, while the deposits in the second sensor chamber 87 and the first controller chamber 10 are controlled by the controller. When the valve 10 is opened, it is automatically and intermittently discharged.

In the illustrated embodiment, an air filter 202 is arranged as a filter in the atmospheric pressure pipe 117, and collects particles of impurities or plastic shavings. The particles of impurities or the shavings of plastic are found in the vent pipe system in which atmospheric pressure is introduced, and stop between the valve pipe portion 105 and the valve seat 111 from the vent pipe system. Impurity particles or a scraping layer of plastic are the valve ball portion 105.
Stopping between the valve seat 111 and the valve seat 111 adversely affects the control, and requires early repair or replacement of parts. By providing the air filter 202, it is possible to remove large impurity particles to the extent that they adversely affect the control.

Further, only by providing the orifice 177 of the atmospheric pressure pipe 117, it is possible to prevent the valve lever 99 and the valve ball portion 105 from accurately acting when the pressure of the first controller chamber 120 rises to the atmospheric pressure during the operation of the valve controller. It has been found to be insufficient to guarantee.
However, in the illustrated embodiment, the sensor variable orifice duckbill 20
4 is provided and works well. That is, the pressure increase from the sensor port 21 presses the diaphragm 81, which in turn presses the valve lever 99, and at the same time, the valve ball portion 105 begins to separate from the valve seat 108. At this point, the pressure rise in the first controller chamber 120 is very slow and the valve seat 108
The amount of air that enters the first controller chamber 120 via the is small. Sensor variable orifice duck building 20
Reference numeral 4 limits the amount of air passing through the atmospheric pressure pipe 117, so that the vacuum sucks the diaphragm 81 inward and opens the valve seat 108 sufficiently. Valve seat 1
When 08 is fully opened, the sensor variable orifice duckbill 204 is also fully opened, and the first controller chamber 120
The inside pressure is increased to atmospheric pressure. In addition, the sensor variable orifice duckbill 204 has an orifice with a diameter of 0.0508 cm (0.020 inch), allowing air to flow back through the atmospheric pressure pipe 117. The backflow is necessary when the diaphragm 81 is pressed inward, and the backflow does not cause an increase in pressure in the second sensor chamber 87, while the differential pressure that moves the diaphragm 81 increases.

Further, in the illustrated embodiment, improvements are made to improve product quality and reduce the need for repair. The components of conventional valve controllers have a short life compared to the desired period of time, and assembling the components has been a time consuming and difficult task. On the other hand, in the illustrated embodiment, by installing the two-tube mounting adapter of the two-port plate 206, the necessity of installing a tee in the piping work is eliminated. Here, the second port plate and the two-tube mounting adapter are bonded with a solvent. The two-tube mounting adapter is connected to the controller chamber 153, and an umbrella-shaped check valve 208 is installed in the controller chamber 153. This umbrella-type check valve 208 is disclosed in US Pat. No. 43.
In No. 73838, it was installed in place of the check valve 195 provided in the branch pipe 192 and is a completely new one.

It is not possible to reliably seal the opening for the rod 138 between the controller chambers 132, 153 only by providing the seal indicated by reference numeral 144 in FIGS. 2 and 3. Although the seal 144 can prevent an air flow from the controller chamber 153 toward the second controller chamber 132, the vacuum degree of the controller chamber 153 is increased and the second operation of the valve controller (Second cyclin) is performed.
The air flow from the second controller chamber 132 toward the controller chamber 153 caused by g) cannot be prevented. In the illustrated embodiment, since the seal 210 is provided in place of the rod bearing 142 in FIGS. 2 and 3 of US Pat. No. 4,373,838, the air flow from the second controller chamber 132 to the controller chamber 153 is also sealed. . In other words, the rod 1 between the controller chambers 132, 153
Seals 144, 21 on either side of the opening for 38, respectively.
Since 2 is provided, the air flow flowing in either direction is blocked.

2 and 3 of U.S. Pat. No. 4,373,838, the slot 1 in the rod serves as a passage for vacuum pressure or fluid.
56 is formed. However, in order to form such slots, manual machining is required to remove machining burrs. On the other hand, in the illustrated embodiment, the slot 21 is not provided, and the grooves 21 are provided at two positions on both sides of the rod.
0 is formed. The vacuum pressure or fluid passage through the groove 210 has twice the size of the passage through the slot, which reduces friction and allows faster air flow, thus allowing faster valve controller operation. Further, when a fluorosilicone compound is used as a lubricant, the life of the seal is extended, friction is reduced, and inconveniences such as solidification of the lubricant due to low temperature are prevented.
Here, only the areas of the rod 138 that come into contact with the seals 144, 210 are lubricated.

In addition to this, in the illustrated embodiment, a pipe adapter 214 is provided which is connected to a counting device which operates under vacuum pressure and counts the operation cycle of the valve controller. And
The adapter is provided with a cap.

In a valve controller used in a wastewater transfer system, pressure fluctuations occur in the system depending on the usage conditions. And to provide a valve controller that can be used in any case, US Pat.
It is necessary to remove the orifice 72 shown at 38. Therefore, in the illustrated embodiment, the sensor port 21
No such orifice is provided in.

Although not clearly shown, the sensor pipe 3 that connects the sensor port 21 and the storage tank 2 is provided with a sensor surge suppressor. The purpose of the sensor surge suppressor is to prevent air from flowing to the storage tank and the sensor being set off when the control valve is suddenly closed.

It should be noted that the material of the valve controller of the present invention is selected to be transparent, and the transparent material visually indicates the operation and contamination by water or dirt. This brings maintenance and sales benefits. Then, while the main body of the valve controller is transparent, its action is visually displayed to diagnose the malfunction of the control. In addition, as the transparent material, for example, corrosion-resistant plastic is used.

[Effects of the Invention] The effects of the present invention are listed below.

(1) The operation becomes faster.

(2) No malfunction occurs.

(3) Friction and mechanical interference during operation are small.

(4) It is easy to manufacture, and the required cost and labor are reduced.

(5) It can handle sudden opening and closing of the control valve.

(6) The product has a long life.

[Brief description of drawings]

FIG. 1 is a side view of a wastewater transfer system using the valve controller of the present invention, FIG. 2 is a side sectional view showing a standby state of the valve controller, and FIG. 3 is a side sectional view showing an operating state of the valve controller. . 15 ... Valve controller, 202 ... Air filter, 204 ... Sensor variable duckbill, 206 ... 2-port plate, 208 ... Umbrella check valve, 210 ... Seal, 212 ... Groove, 214 ... Piping adapter

Continuation of front page (72) Inventor Mark A. Jones United States 46975 Indiana, Rochester, Box 14 Earl. R. No. 7 Colonial Bay Condominiums (72) Inventor Hisao Hoshina 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Inside the EBARA CORPORATION (72) Inventor Hiroshi Aoike 11-1 Haneda-Asahi-cho, Ota-ku, Tokyo EBARA CORPORATION In-house (56) References JP-A-49-67435 (JP, A) JP-A-50-38824 (JP, A)

Claims (1)

[Claims] 1. A valve controller for controlling the opening and closing of a control valve interposed in a discharge pipe of a vacuum sewage transfer system, wherein the valve controller is in pressure communication with a storage tank upstream of the control valve and is in the storage tank. A pressure sensor equipped with a pressure sensor valve that opens and closes in response to a predetermined pressure, a three-way valve that switches the control valve between open and closed positions, and a differential pressure that activates the three-way valve in response to opening and closing of the pressure sensor valve. A valve controller including a response means and a duckbill provided with an orifice in an atmospheric pressure pipe for introducing atmospheric pressure into a sensor chamber provided with a pressure sensor valve.