JPH1060990A - Vacuum valve with auxiliary vacuum vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum valve having no possibility that sucked foreign matter such as shingle or the like blocks up a gap between a valve element of the vacuum valve and a drum due to the vacuum valve's start to suck dirt in the midway of opening caused by lowering of vacuum pressure of a vacuum system. SOLUTION: This vacuum valve comprises a suction pipe 3, the tip of which is disposed in a house-inlet 1, a vacuum valve main body 4 for connecting between the suction pipe 3 and the vacuum system 5, and a control device 11 for controlling opening and closing of the vacuum valve main body 4. In the vacuum valve control device, the vacuum of the vacuum system 5 is guided to the vacuum valve main body 4 by the control of the control device 11, thereby opening the valve element 6 of the vacuum valve of the vacuum valve main body 4, sucking sanitary sewage in the house inlet by the suction pipe 3 to be transferred to a designated place. A piping 35 for guiding vacuum of the vacuum system 5 to the vacuum valve main body 4 is provided with an auxiliary vacuum vessel 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum valve in a vacuum suction transfer system for sucking sewage in sewage by a suction pipe by opening a vacuum valve and transferring the sewage to a predetermined place such as a sewage treatment plant.

[0002]

2. Description of the Related Art FIG. 4 is a view showing an example of the configuration of a conventional vacuum valve control device of this type disclosed in the specification and drawings of Japanese Patent Application No. 7-39362. In the figure, reference numeral 1 denotes a sewage tank, into which a tip of a suction pipe 3 is inserted, and a rear end of the suction pipe 3 is connected to a vacuum tank (vacuum system) via a vacuum valve 6. Is connected to a line 5 communicating with.
Reference numeral 4 denotes a vacuum valve main body. The vacuum valve main body 4 includes a diaphragm 4b in a chamber 4c and a spring 4 for urging the diaphragm 4b.
a.

When the water level of the sewage water rises and the pressure of the pressure sensor pipe 2 rises, the pressure is transmitted to the first chamber 17 of the control device 11 through the pipe 33, thereby causing the second diaphragm to move. 16 moves to the right overcoming the elastic force of the spring 28 and the magnetic attraction force of the magnet 29, and pushes the shaft 14 so that the valve 13 closes the hole 30 communicating with the atmosphere. This causes the vacuum of line 5 to pass through pipe 35 to the fifth chamber 24.
And transmitted to the sixth chamber 25, and further transmitted to the chamber 4 c of the vacuum valve main body 4 through the pipe 36.

When the vacuum of the line 5 is transmitted to the chamber 4c of the vacuum valve body 4, the vacuum valve body 6 is pulled up by the vacuum and separated from the opening of the body 7 (the vacuum valve is opened).
Thereby, the sewage in the sewage tank 1 is sucked by the suction pipe 3 and transferred through the opening of the body 7 and the line 5. When the water level of the sewage falls and the lower end of the suction pipe 3 sucks air, the pressure difference between the pressure detection holes 9 and 10 disappears, so that the first diaphragm 19 is pushed to the left by the spring 28. , The valve 13 is pressed to the left,
Close the through hole of No. 3.

As a result, the atmosphere flows into the sixth chamber 25,
The air flows into the chamber 4c of the vacuum valve body 4 through the pipe 36. As a result, the vacuum valve body 6 is pushed by the spring 4a to close the opening of the body 7 and cut off the communication between the suction pipe 3 and the line 5. Actually, the air is sucked by the suction air pipe 8 at the same time that the vacuum valve 6 opens to start sucking the sewage.

[0006]

The above-mentioned conventional vacuum valve control apparatus has the features that the intake does not vary due to the degree of vacuum of the line 5, the structure is simple, the number of parts is small, and the maintenance is easy. However, as described above, since the vacuum valve valve 6 is opened to start sucking sewage and air is also sucked in by the suction air pipe 8, especially when the vacuum valve is opened when the degree of vacuum of the line 5 is low, the line 5, a sufficient vacuum is not transmitted to the chamber 4a of the vacuum valve main body 4, and the vacuum valve 6 starts sucking sewage with the opening degree in the middle. As a result, there is a possibility that foreign matter such as sucked pebbles may block between the vacuum valve body 6 and the body 7.

[0007] The present invention has been made in view of the above points, and the reduced pressure of the vacuum system (line 5) causes the vacuum valve to start sucking sewage with the opening degree halfway, thereby sucking pebbles and the like. It is an object of the present invention to provide a vacuum valve which is free from the possibility that foreign matter closes between the vacuum valve body and the body.

[0008]

According to the first aspect of the present invention, there is provided a suction pipe having a tip disposed in a sewage tank, a vacuum valve connecting the suction pipe to a vacuum system, and a vacuum valve. By providing control means for controlling the opening and closing of the valve, by guiding the vacuum of the vacuum system to the vacuum valve under the control of the control means,
Open the vacuum valve and suction the sewage in the sewage with the suction pipe,
A vacuum valve for transferring to a predetermined place, wherein an auxiliary vacuum tank is provided in a pipe for guiding vacuum of a vacuum system to the vacuum valve.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration example of a vacuum valve control device according to the present invention, FIG. 2 is a diagram showing details of the vacuum valve control device, and FIG. 3 is a diagram showing an auxiliary vacuum tank. In FIG. 1, portions denoted by the same reference numerals as those in FIG. 4 indicate the same or corresponding portions. The vacuum valve control device of FIG. 1 and the vacuum valve control device of FIG. 4 have substantially the same configuration, and the difference is that in FIG. In that an auxiliary vacuum tank 37 is provided.

By providing the auxiliary vacuum tank 37 in this way, the vacuum valve valve 6 is opened to start sucking the sewage in the sewage tank 1, and at the same time, air is also sucked by the suction air pipe 8 and the vacuum pressure of the line 5 is reduced. The auxiliary vacuum tank 3
7, the sufficient vacuum is applied to the chamber 4c of the vacuum valve main body 4, and the vacuum valve 6 does not start sucking sewage with the opening degree in the middle. The details will be described below.

The control device 11 has a casing 12,
The casing 12 has a structure in which a large diameter portion 12a and a small diameter portion 12b are integrated. The large diameter portion 12a has a valve body 13 at the center.
A partition wall 15 through which the shaft 14 passes is provided, and is divided into left and right chambers. The left chamber is divided into a first chamber 17 and a second chamber 18 by a second diaphragm 16 provided at the center, and the first diaphragm 1 provided at the center of the right chamber.
9 divides into a third chamber 20 and a fourth chamber 21. The small-diameter portion 12 b is divided into left and right chambers by a partition 22, and the left chamber communicates with the fourth chamber 21, and the right chamber is divided into a fifth chamber 24 and a sixth chamber 25 by a partition 23.

The valve body 13 fixed to the tip of the shaft 14
The rear end of the shaft 14 is fixed to the center of the second diaphragm 16. The shaft 14 is a partition 15
, And the first diaphragm 19 is inserted (the first diaphragm 19 is fixed to the shaft 14).
The partition wall 22 and the partition wall 23 are penetrated. The shaft 14 is a partition 15
A seal mechanism 26 is provided in a penetrating portion penetrating through, and a seal mechanism 27 is provided in a penetrating portion penetrating the partition wall 22, respectively.
A through hole 23 a that is opened and closed by the valve 13 is provided in a through portion of the partition wall 23 of the shaft 14. Reference numeral 28 denotes a spring for pushing the first diaphragm 19 to the left.

A magnet 29 is provided on the rear end wall of the casing 12 at a position facing the rear end of the shaft 14 (fixing screw 14a made of a magnetic material). The sixth chamber 25 is opened and closed by the valve 13 and provided with a hole 30 communicating with the atmosphere. The suction pipe 3 is provided with pressure detection holes 9 and 10 at predetermined upper and lower intervals. The pressure detection hole 9 communicates with the fourth chamber 21 through a pipe 31, and the pressure detection hole 10 communicates with the third chamber 20 through a pipe 32. , And the pressure sensor pipe 2 communicates with the first chamber 17 through a pipe 33. The second chamber 18 communicates with the atmosphere through a hole 34. The fifth chamber 24 passes through a pipe 35 and a check valve 38.
The sixth chamber 25 communicates with the chamber 4c of the vacuum valve main body 4 via a pipe 36.

In the vacuum control device having the above-described structure, when the level of the sewage in the sewage tank 1 rises and the pressure in the pressure sensor tube 2 rises, the pressure passes through the pipe 33 to the first chamber 17 in the control device 11. Reportedly. As a result, the second diaphragm 16 moves to the right by overcoming the elastic force of the spring 28 and the magnetic attraction force of the magnet 29 and pushes the shaft 14, so that the valve 13 closes the hole 30 communicating with the atmosphere. While the line 5 and the vacuum valve 4 are not operating (the through hole 23a is
), The vacuum stored in the auxiliary vacuum chamber 37 passes through the check valve 38 and passes through the pipe 35 to the fifth chamber 24.
And transmitted to the sixth chamber 25, and further to the chamber 4 of the vacuum valve body 4.
c. As a result, the vacuum valve 6 is pulled up from the opening of the body 7.

At this time, when the second diaphragm 16 is pushed by the pressure of the pressure sensor tube 2 and the shaft 14 starts to move, the elastic force of the spring 28 increases with the movement of the shaft 14, but the magnetic attraction of the magnet 29 Since the force decreases rapidly (inversely proportional to the square of the moving distance), the shaft 14 moves at a stroke to the moving end, that is, the position where the valve body 13 closes the hole 30. Here, the fifth room 24,
The sixth chamber 25 and the valve body 13 constitute a vacuum opening / closing mechanism for opening / closing the vacuum valve body 4.

When the vacuum valve 6 is lifted, the line 5 and the suction pipe 3 communicate with each other, so that sewage starts to be sucked, and a pressure difference is generated between the pressure detecting holes 9 and 10 and this is a pipe. The information is transmitted to the fourth chamber 21 and the third chamber 20 through 31 and 32, respectively. This differential pressure is applied to the first diaphragm 1
9 is pushed to the right, and the valve 13 is further pushed to the right via the shaft 14. Even if the water level of the sewage drops and the pressure difference between the first chamber 17 and the second chamber 18 disappears, while the sewage flows through the suction pipe 3, the pressure difference between the fourth chamber 21 and the third chamber 20 may occur. The valve 13 is kept pressed to the right.

When the water level of the sewage drops further and the lower end of the suction pipe 3 sucks air, the pressure difference between the pressure detecting hole 9 and the pressure detecting hole 10 disappears.
The diaphragm 19 is pushed to the left and the valve body 13 is pushed to the left to close the through hole 23a of the partition wall 23. Thereby, the air flows into the sixth chamber 25, and the air is
After flowing into the chamber 4c of the vacuum valve body 4 through 6, the vacuum valve body 6 is pushed by the spring 4a, closes the opening of the body 7, and blocks the suction pipe 3 from communicating with the line 5.

As described above, when the vacuum valve 6 is opened and the sewage in the sewage tank 1 is started to be sucked, air is also sucked in by the suction air pipe 8 and the vacuum pressure in the line 5 is reduced. The vacuum in the auxiliary vacuum tank 37 compensates for this, and a sufficient vacuum is applied to the chamber 4c of the vacuum valve main body 4, so that the vacuum valve 6 does not start sucking sewage with the opening degree in the middle. While the vacuum valve body 6 is closed, the auxiliary vacuum chamber 37 always stores the highest degree of vacuum in the line 5 by the action of the check valve 38 provided downstream of the vacuum valve body 4. Will be.

The auxiliary vacuum chamber 37 is made of resin, is light, and has a rugby ball-shaped cross section with a circular cross section, a large diameter at the center and a small diameter at the top and bottom. By adopting such a structure,
The structure can withstand the external pressure applied when the inside is evacuated. Reference numeral 37a denotes a connection port of the pipe 39, and 37b denotes rib-shaped legs provided on both sides.

In the present embodiment, the capacity of the auxiliary vacuum chamber is set to 6 liters. When the vacuum valve body 6 opens, the opening degree becomes at least 50% or more, and there is no fear that the sucked foreign matter closes the gap between the vacuum valve body 6 and the body 7.

[0021]

As described above, according to the present invention, since the auxiliary vacuum tank is provided in the pipe for guiding the vacuum of the vacuum system to the vacuum valve, the vacuum valve is opened and the waste water and air in the waste water are sucked. At the same time as starting, the vacuum in the auxiliary vacuum tank compensates for the decrease in vacuum pressure of the vacuum system, so that the vacuum valve does not start sucking sewage with the opening degree halfway, and the vacuum valve is closed by the sucked foreign matter. The risk of being caught can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration example of a vacuum valve control device according to the present invention.

FIG. 2 is a diagram showing a configuration of a vacuum valve control device according to the present invention.

3A and 3B are diagrams showing an auxiliary vacuum chamber of the vacuum valve control device according to the present invention, wherein FIG. 3A is a front view, FIG.
FIG. 3C is a top view, and FIG. 3D is a bottom view.

FIG. 4 is a diagram showing a configuration example of a conventional vacuum valve control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sewage water tank 2 Pressure sensor pipe 3 Suction pipe 4 Vacuum valve main body 5 Line 6 Vacuum valve valve body 7 Body 8 Simultaneous intake air pipe 9 Pressure detection hole 10 Pressure detection hole 11 Controller 12 Casing 13 Valve body 14 Shaft 15 Partition wall 16th 2 diaphragm 17 1st chamber 18 2nd chamber 19 1st diaphragm 20 3rd chamber 21 4th chamber 22 Partition wall 23 Partition wall 24 Fifth chamber 25 Sixth chamber 26 Seal mechanism 27 Seal mechanism 28 Spring 29 Magnet 30 Hole 31 Pipe 32 pipe 33 pipe 34 hole 35 pipe 36 pipe 37 auxiliary vacuum tank 38 check valve

Claims (1)

[Claims] 1. A suction pipe having a tip disposed in a sewage basin,
A vacuum valve for connecting the suction pipe and the vacuum system; and a control means for controlling opening and closing of the vacuum valve. The vacuum of the vacuum system is guided to the vacuum valve by controlling the control means, thereby opening the vacuum valve. A vacuum valve for sucking sewage in a sewage tank with the suction pipe and transferring the sewage to a predetermined place, wherein an auxiliary vacuum tank is provided in a pipe for guiding vacuum of the vacuum system to the vacuum valve. Vacuum valve with vacuum chamber.