JPH07317943A - Vacuum valve - Google Patents

Abstract

PURPOSE:To maintain the air-liquid ratio in a duct line in a constant scope, and to operate the device stably, by composing an opening time regulating valve with a tubular elastic body, and contracting the section area of an air hole so as to make variable. CONSTITUTION:A vacuum valve is composed by integrating the first and the second housings through a band clamp, and by providing a valve body, a valve operating chamber, a spring, and a controller. Furthermore, a pressure control chamber 83 to give a vacuum force to the valve body 71 to connect a vacuum passage to the valve operating chamber; a detecting valve 68; a plunger 65 driven directly by a liquid detecting diaphragm 60, and to drive the detecting valve 68; and an air hole to release the vacuum force led in to the pressure control chamber 83; are provided, and an air relief valve 74 to control the opening time of the vacuum valve by contracting and deforming the section area is also provided. Consequently, the opening time of the vacuum valve set initially can be maintained stably for a long period.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a vacuum type waste water collecting device,
The present invention relates to a vacuum valve suitable for constituting a vacuum type chemical liquid transportation device and the like.

[0002]

[Prior Art] Conventionally, as a vacuum valve, the patent was published in 1990.
There is one as described in Japanese Patent No. 503128. This conventional technology makes it possible to open and close the connecting part between the suction pipe communicating with the tank and the vacuum discharge pipe communicating with the vacuum source, and the valve body for opening and closing the connecting part, and the vacuum of the vacuum discharge pipe built in the valve body. And a controller for operating the valve body by the pressure difference of the atmosphere.

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 tank, and a three-way valve which switches between opening and closing of the vacuum valve, and the movement of the liquid level detection diaphragm. By operating the detection valve via the plunger, a vacuum force is introduced from the vacuum discharge pipe to the pressure control chamber, and the three-way valve is operated by this vacuum force. The vacuum force introduced to the pressure control chamber is released to the atmosphere by the needle valve (Fig. 6).

[0004]

However, in the conventional vacuum sewage collection system, for example, as shown in FIG. 4, a vacuum pipe line 3 is provided at a point far from the vacuum station 2 for collecting sewage in the water collection tank 1. The sawtooth lift 4 causes a phenomenon in which the vacuum pressure decreases. Therefore, in the opening time adjusting mechanism by the needle valve provided in the controller part of the conventional vacuum valve, the needle valve is adjusted in the vicinity of the vacuum station and the distance, and the opening time of the vacuum valve at the far point is lengthened, It was necessary to keep the gas-liquid ratio in the pipeline within a certain range (see Japanese Patent Laid-Open No. 2-292427).

At this time, the needle valve adjusts the gap between the outer cylinder and the needle to adjust the air flow rate, but the gap amount of the needle valve for obtaining the optimum opening time of the vacuum valve is very small.
When the vacuum valve has been operating for a long time, dust from the outside,
The small gap was gradually narrowed by sucking dust and water, and the opening time was changed to be longer, and in the worst case, the vacuum valve could be left open.

According to the present invention, the opening time of the initially set vacuum valve is stably maintained for a long period of time, so that the vacuum valve is operated at an appropriate opening time according to the vacuum pressure of the vacuum discharge pipe, The purpose is to keep the gas-liquid ratio in the passage within a certain range and to operate the vacuum type waste water collection device etc. stably.

[0007]

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 discharging pipe communicating with a vacuum source, and opening and closing the connecting portion. Valve body, a valve working chamber that accommodates a plunger connected to the valve body, a closing force applying unit that is built in the valve working chamber and applies a closing force to the valve body, and a vacuum pressure is applied to the valve working chamber. And a controller unit for applying an opening force to the valve body, the controller unit including a three-way valve capable of switching and connecting the vacuum passage and the atmosphere passage to the valve working chamber, A liquid level detection diaphragm that operates in response to the liquid level in the tank, a pressure control chamber that applies a vacuum force to the three-way valve so that the three-way valve connects the vacuum passage to the valve working chamber, and a pressure control chamber A detection valve that is installed to enable a vacuum force to be introduced into the pressure control chamber; It is directly driven by the detection diaphragm and has a plunger that is inserted into the pressure control chamber to drive the detection valve and a vent hole that releases the vacuum force introduced into the pressure control chamber. The cross-sectional area is variable and an opening time adjusting valve for controlling the opening time of the vacuum valve is provided.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, the opening time adjusting valve is made of a cylindrical elastic body.

[0009]

The opening time adjusting valve is not a conventional needle valve for adjusting the clearance, but is composed of a tubular elastic body or the like, and a relatively large air passage can be taken. I got it. Therefore, even if the vacuum valve is repeatedly operated for a long period of time, dust, dirt, moisture, etc. can be passed therethrough, and as a result, the initially set opening time of the vacuum valve can be stably maintained for a long period of time. .

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic view showing a vacuum type waste water collecting device, FIG. 2 is a schematic view showing a vacuum valve, FIG. 3 is a sectional view showing a controller part, FIG. 4 is a schematic view showing a vacuum type waste water collecting system,
FIG. 5 is a schematic view showing an example of the opening time adjusting valve according to the present invention,
FIG. 6 is a schematic view showing a conventional needle valve.

As shown in FIG. 1, the vacuum type sewage collecting apparatus 10 has a sewage inflow pipe 12 connected to a tank 11, a suction pipe 13 communicating with the tank 11, and a vacuum discharge pipe 14 communicating with a vacuum source. Vacuum valve that can open and close the connection between
Have five.

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, this dirty water is sucked into the vacuum discharge pipe 14 through the vacuum valve 15, collected in a water collecting tank on the vacuum pump, and then sent to a sewage treatment plant or the like by a pressure pump.

As shown in FIGS. 1 and 2, the vacuum valve 15 connects the first and second housings 21 and 22 to the band clamp 2
The valve body 24, the valve working chamber 25, the spring 26, and the controller portion 27 are integrally formed.

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

The valve working chamber 25 includes a valve valve body 24 and a valve rod 29.
The cup-shaped plunger 30 connected via the is slidably accommodated.

The spring 26 is a plunger 30 of the valve working chamber 25.
It is built in the upper chamber and exerts a spring force on the plunger 30 to give a closing force to the valve body 24.

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

The controller unit 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 integrated with the second housing 22 of the vacuum valve 15 by the band clamp 36.

The controller section 27 has a liquid level detection pipe connection port 56 to which a liquid level detection pipe 37 communicating with the tank 11 is connected via a hose 38. The liquid level detection pipe connection port 56 is connected to the first case 51 via a vibration damping prevention diaphragm 59. A small through hole is provided in the diaphragm 59 to transmit pressure, and the outer peripheral portion of the diaphragm 59 is not fixed.
The air from the lower side can also pass around the diaphragm 59.

Further, the controller unit 27 has a vacuum pressure connection port 57 to which the vacuum discharge pipe 14 is connected via a hose 41.
Is provided in the third case 53.

Further, the controller unit 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 liquid 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 liquid 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 the passage 57A communicating with the vacuum pressure connection port 57, and the detection valve 68 can open and close the opening of the passage 57A to the chamber 83. The detection valve 68 is provided with a tongue piece 68B capable of closing the opening of the passage 57A at the tip of the leaf spring 68A, and when the leaf spring 68A is elastically pushed by the plunger 61, the tongue piece 68B.
Is separated from the opening of the passage 57A to open the opening, and the room 8
It is possible to introduce a vacuum force into the inside of 3. Reference numeral 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 No. 5 communicates with the vacuum discharge pipe through a passage 91. The chamber 86 formed by the lower part of the fourth case 54 and the upper part of the fifth case 55 has a passage 93 in the working chamber 25 of the vacuum valve body.
Through. The valve body 71 provided between the two valve seats 72 and 73 plays a role as a three-way valve so as to guide either the atmosphere or the vacuum to the chamber 86 by sliding 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 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, an air escape valve 74 as an opening time adjusting valve is provided in the upper chamber 83 of the third case 53 so that the atmosphere gradually enters through the vent hole 74A of the air escape valve 74. (Fig. 5). The air relief valve 74 is made of an elastic body such as thick-walled cylindrical rubber or thermoplastic elastomer, and the inner diameter portion of the air relief valve 74 has a vent hole 74.
A, and the opening 74B of the vent hole 74A is formed in the thick portion at one end thereof.
Is formed as a cutout, and the opening time adjusting screw 102 has a vent hole 7
The cross-sectional area of the vent hole 74A can be varied by adjusting the amount of compression applied in the axial direction of 4A. When the vacuum degree of the vacuum discharge pipe 14 is high, the opening time adjusting screw 102
To reduce the opening time of the vacuum valve by increasing the cross-sectional area of the vent hole 74A of the air relief valve 74, and when the vacuum degree of the vacuum discharge pipe 14 is low, tighten the opening time adjusting screw 102 to release the air. The vent hole 74A of the valve 74 is used by adjusting it so that the cross-sectional area of the vent hole 74A is reduced and the opening time of the vacuum valve is lengthened.

The controller section 27 of the vacuum valve operates as follows. When the liquid level in the tank 11 rises, the liquid level detection pipe 37,
The air pressure in the liquid level detection diaphragm upper chamber 81 rises through the small holes of the hose 38 and the vibration suppression diaphragm 59, and the liquid level detection diaphragm lower chamber 82 communicates with the atmosphere, so that a liquid level that causes a pressure difference is generated. The detection diaphragm 60 is displaced downward.

The plunger 65 provided in the lower portion of the liquid level detection diaphragm 60 is pushed by the displacement of the diaphragm 60 to be displaced downward, and the detection 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 third case chamber 8
The diaphragms 3 and 84 are evacuated and the lower chamber 85 of the three-way valve diaphragm 70 communicates with the atmosphere, so that the diaphragm 70 having a pressure difference is pulled downward, and the valve body 71 also rises accordingly. The chamber 86 that moves from the valve seat 73 of the fifth case 55 to the valve seat 72 of the fourth case 54 and communicates with the working chamber 25 of the vacuum valve body is brought into a vacuum state. As a result, the vacuum valve body is opened, and the dirty water in the tank is removed from the vacuum discharge pipe.
It is discharged to 4.

When the liquid in the tank is discharged, the liquid level is lowered, the pressure applied to the liquid level detecting diaphragm 60 is lowered, and the liquid is pushed back by the spring 66 provided on the plunger 65. Air immediately escapes from the part, and the detection valve 68 closes to the initial state accordingly.

The vacuum in the chamber 83 of the third case 53 is released through the air relief valve 74, the passage 93, the lower chamber of the detection diaphragm 60, and the passage 94, which are adjusted according to the degree of vacuum of the vacuum discharge pipe 14, into the atmosphere. Since it is introduced, there is a slight time lag and it becomes an atmospheric state, and the three-way valve diaphragm 70
There is no pressure difference between the two sides and the spring 69 pushes it back to the original state, the valve body 71 also closes the valve seat 73 of the original fifth case 55, and the room communicating with the working chamber 25 of the vacuum valve body is brought to the atmospheric state. Let At this time, the atmosphere is taken in through the passage 92,
The chamber below the liquid level detection diaphragm 60 is in a depressurized state through the passage 93 and tries to attract the liquid level detection diaphragm 60 downward.
The upper chamber 81 of the liquid level detection diaphragm 60 is closed by closing the hole of the valve seat 101, and the liquid level detection diaphragm 60 is not displaced downward. Will not be activated. As a result, the vacuum valve body is closed.

The shaft sealing member of the plunger 65 is O
If a U packing is used instead of the ring, the operating resistance of the plunger can be reduced and the shaft sealing effect can be enhanced by self-sealing.

Therefore, according to this embodiment, there are the following effects. Since the displacement of the liquid level detection diaphragm 60 that operates with the change in the liquid level of the tank 11 is directly transmitted to the detection valve 68 via the plunger 61, the operating force of the liquid level detection diaphragm 60 is sufficient only by the force pressing the plunger 61. , Tank 1
The diaphragm 60 for responding properly to the liquid level in
Can be made small, and the vacuum valve 15 can be made compact.

With the operation of the detection valve 68, the plunger 6
Even if vacuum pressure is applied to one end of 1 and suction force works, return spring 6
Since the force is smaller than the force of 6 or the like, the plunger 61 operates in accordance with the displacement of the liquid level detection diaphragm 60 even when the vacuum pressure is high, and a highly reliable controller unit 27 that does not cause a malfunction can be configured.

As the opening time adjusting valve, an air relief valve 74 made of a tubular elastic body is used instead of a conventional needle valve for adjusting the clearance, and a relatively large air passage can be taken.
The cross-sectional area of the vent hole 74A is compressed so as to be variable. Therefore, even if the vacuum valve 15 is repeatedly operated for a long period of time, dust, dirt, moisture, etc. can pass therethrough, and as a result, the initially set opening time of the vacuum valve 15 can be stably maintained for a long period of time. You can As a result, the gas-liquid ratio in the pipeline can be maintained within a constant range over a wide range of vacuum pressure of the vacuum discharge pipe 14, and the vacuum type waste water collecting device can be operated stably.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific structure of the present invention is not limited to this embodiment, and changes in design within the scope not departing from the gist of the present invention can be made. Even if it exists, it is included in the present invention. For example, the opening time adjusting valve is not limited to the cylindrical body.

[0036]

As described above, according to the present invention, the opening time of the initially set vacuum valve is kept stable over a long period of time, so that an appropriate opening time according to the vacuum pressure of the vacuum discharge pipe is obtained. To operate the vacuum valve to keep the gas-liquid ratio in the pipeline within a certain range,
It is possible to stably operate the vacuum type waste water collection device and the like.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a vacuum type waste water collecting device.

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

FIG. 3 is a cross-sectional view showing a controller unit.

FIG. 4 is a schematic view showing a vacuum type waste water collecting system.

FIG. 5 is a schematic view showing an example of an opening time adjusting valve according to the present invention.

FIG. 6 is a schematic view showing a conventional needle valve.

[Explanation of symbols]

 11 tank 13 suction pipe 14 vacuum discharge pipe 15 vacuum valve 24 valve body 25 valve working chamber 26 closing force applying spring 27 controller section 60 liquid level detection diaphragm 65 plunger 68 detection valve 71 valve body (three-way valve) 74 air release valve 74A Vent 83 rooms (pressure control room)

Claims (2)

[Claims] 1. A valve body for opening and closing a connecting portion between a suction pipe communicating with a tank and a vacuum discharge pipe communicating with a vacuum source, and a plunger connected with the valve body for opening and closing the connecting portion. A valve working chamber to be housed, a closing force applying unit that is built in the valve working chamber and applies a closing force to the valve body, and a controller unit that applies a vacuum pressure to the valve working chamber to apply an opening force to the valve body. In a vacuum valve configured to have the controller part, a three-way valve capable of switching and connecting a vacuum passage and an atmosphere passage to a valve working chamber, and a liquid level detection diaphragm that operates in response to a liquid level in a tank And a pressure control chamber for applying a vacuum force to the three-way valve so that the three-way valve connects the vacuum passage to the valve working chamber, and a vacuum force can be introduced into the pressure control chamber by being arranged in the pressure control chamber. Is driven directly by the detection valve and the liquid level detection diaphragm. Along with the
It has a plunger that is inserted into the pressure control chamber and drives the detection valve, and a vent hole that releases the vacuum force introduced into the pressure control chamber.
A vacuum valve, comprising: an opening time adjusting valve that controls the opening time of the vacuum valve by varying the cross-sectional area of the vent hole by compressing and deforming. 2. The vacuum valve according to claim 1, wherein the opening time adjusting valve is made of a cylindrical elastic body.