JP3475030B2 - Vacuum valve unit - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum valve unit used in a vacuum type wastewater collecting apparatus. FIG. 3 is a schematic view showing an example of a vacuum type wastewater collecting apparatus. As shown in the figure, the sewage discharged from each household 150 or factory, etc.
Through the vacuum valve unit 153 buried underground. When a predetermined amount of the sewage accumulates in the vacuum valve unit 153, the vacuum valve 155 is opened, sucked from the suction pipe 157, introduced into the vacuum sewer pipe 33, and collected in the water collecting tank 156 of the vacuum pump station 159. The water is sent to a sewage treatment plant (not shown) by a pressure pump 158. [0003] Conventionally, one vacuum valve 15 is provided in each vacuum valve unit 153.
5 was installed, any one of the vacuum valves 1
If a state occurs in which the valve 55 is not completely closed due to some cause (for example, foreign matter mixed in sewage, etc.), not only the failure of the vacuum valve unit 153 having the vacuum valve 155 but also the vacuum valve 155 When a large amount of air is sucked from the vacuum system, the vacuum in the entire system of the vacuum sewer pipe 33 is lost, and the entire system of the vacuum-type wastewater collecting apparatus does not function. [0004] The present invention has been made in view of the above points, and an object of the present invention is to prevent a large amount of air from flowing from a vacuum valve unit including the vacuum valve even if one of the vacuum valves fails. There is no vacuum valve unit to provide. [0005] In order to solve the above problems, the present invention provides a sewage tank for collecting sewage discharged from homes and facilities, a vacuum sewage pipe introduced into the sewage tank, A vacuum valve attached to the vacuum sewage pipe, wherein when the sewage in the sewage tank reaches a predetermined amount, the vacuum valve is opened to suck the sewage into the vacuum sewage pipe and discharge it to the outside. A plurality of the vacuum valves were attached to the vacuum sewage pipe in series. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic side sectional view showing a vacuum valve unit 10 according to one embodiment of the present invention. [0007] As shown in FIG.
Connects the sewage inflow pipe 30 and the vacuum sewage pipe 35 to the sewage tank 20, and connects two vacuum valves (a main vacuum valve 40 and an auxiliary vacuum valve 6) in series to the portion of the vacuum sewage pipe 35 introduced into the sewage tank 20.
0) is attached. Here, the inside of the wastewater trough 20 is vertically divided by a partition plate 21, and the upper part thereof is
3. The lower part is a sewage chamber 25, and the upper end surface is closed by a lid 27. In the machine room 23, a vacuum valve controller 80 is installed in addition to the main vacuum valve 40 and the auxiliary vacuum valve 60. On the other hand, into the sewage chamber 25, an end of a sewage inflow pipe 30 and an end of a suction pipe 34 connected to a main vacuum valve 40 are introduced. FIG. 2 is a view showing a method of controlling the main vacuum valve 40 and the auxiliary vacuum valve 60 by a vacuum valve controller 80. As shown in FIG. 1, the main vacuum valve 40 houses a spring 43 and a piston cup 45 pressed by the elastic force of the spring 43 in a cylinder 41, and fixes a shaft 47 to the piston cup 45. , A valve body 49 is attached to the tip of the shaft 47, and a rubber film 5 is formed between the piston cup 45 and the cylinder 41.
The portion where the spring 43 of the cylinder 41 is housed is sealed by partitioning by 1, while a valve seat 53 is formed in the vacuum valve body 36. Similarly, the auxiliary vacuum valve 60 also accommodates a spring 63 and a piston cup 65 in a cylinder 61, and attaches a valve body 69 to the tip of a shaft 67 fixed to the piston cup 65. 61 are separated by a rubber film 71, and a valve seat 73 is provided in the vacuum valve body 101.
Is formed. In this embodiment, the spring force of the spring 43 of the main vacuum valve 40 and the spring force of the spring 63 of the auxiliary vacuum valve 60 are such that the same vacuum pressure is introduced into both the cylinders 41 and 61 at the same time. In such a case, the auxiliary vacuum valve 60 operates first.
The spring 63 is designed to be weaker. On the other hand, the vacuum valve controller 80 is a device for switching between supplying the vacuum to the main vacuum valve 40 and the auxiliary vacuum valve 60 or supplying the atmospheric pressure according to the level of the sewage in the sewage tank 20. A vacuum extraction pipe 81 drawn from the vacuum sewage pipe 35 on the upstream side of the auxiliary vacuum valve 60, and a pipe 83 drawn from the cylinder 41 of the main vacuum valve 40.
And a pipe 85 drawn from the cylinder 61 of the auxiliary vacuum valve 60, and two sensor pipes 87 and 89 connected to the suction pipe 34, and a suction pipe 34.
And one sensor pipe 91 installed in parallel with each other. Next, the operation of the vacuum valve unit 10 will be described with reference to FIGS. First, in FIG. 1, when sewage flows into the sewage chamber 25 from the sewage inflow pipe 30 and the water level reaches the level a shown in FIG. 2, the vacuum valve controller 80 detects that the pressure in the sensor pipe 91 has increased. Then, the vacuum extraction pipe 81 and the pipes 83 and 85 are simultaneously connected. As a result, the interior of the chamber closed by the cylinders 41, 61 and the rubber films 51, 71 of the vacuum valves 40, 60 becomes negative pressure, and the piston cups 45, 65 rise, respectively. 69 moves to the position indicated by the alternate long and short dash line. At this time, since the elastic force of the spring 63 is configured to be weaker than the elastic force of the spring 43, when the vacuum is simultaneously supplied as described above, the auxiliary vacuum valve 60 operates first. Then, it opens before the main vacuum valve 40. When both vacuum valves 40 and 60 are opened, sewage is sucked from suction pipe 34 to vacuum sewage pipe 35 and discharged. When the water level of the sewage water drops and reaches the level b, the vacuum valve controller 80 returns the atmospheric pressure in the sensor pipe 91 to the atmospheric pressure, and the two sensor pipes 87 and 89 connected to the suction pipe 34. After detecting that the fluid flowing through the suction pipe 34 has changed from sewage to air after the pressure difference has returned to 0, the vacuum extraction pipe 81, the pipe 83,
The connection with 85 is released and the atmospheric pressure is simultaneously introduced into the pipes 83 and 85 instead. As a result, both the vacuum valves 40 and 60 are brought to the atmospheric pressure, the piston cups 45 and 65 are lowered by the resilient force of the springs 43 and 63, respectively, and the valve bodies 49 and 69 are moved to the valve seat 5 respectively.
Block 3,73. At this time, since the elastic force of the spring 63 is configured to be weaker than the elastic force of the spring 43, when the atmospheric pressure is supplied at the same time, the main vacuum valve 40 operates first and the auxiliary vacuum valve operates. It closes before the vacuum valve 60. During the suction of the sewage, impurities (for example, shoes, balls, chopsticks, etc.) mixed into the sewage are removed by the main vacuum valve 40.
Even when the valve is closed between the valve element 49 and the valve seat 53 and cannot be completely closed when the valve is closed, the auxiliary vacuum valve 60 is completely closed.
Only a large amount of air does not flow into the vacuum sewage pipe 35 from 0, so that the vacuum of the entire system of the vacuum sewage pipe 35 is not lost, and the entire system of the vacuum-type sewage collection device does not stop functioning. As described above, the two vacuum valves 40,
When 60 opens, auxiliary vacuum valve 60 opens first, then main vacuum valve 40 opens. Conversely, when both vacuum valves 40, 60 close, the main vacuum valve 40 closes first and then the auxiliary vacuum valve 60 closes. This operation is performed for the following reason. That is, as the auxiliary vacuum valve 60, the main vacuum valve 40
If the same device is used, such considerations are not necessary. However, in general, it is desired to make the auxiliary vacuum valve 60 as simple as possible due to the problem of arrangement in the narrow vacuum valve unit 10. For this reason, the performance against blockage by contaminants
It may be inferior to the main vacuum valve 40. Therefore, the auxiliary vacuum valve 60 is opened and closed while the flow in the vacuum sewage pipe 35 is stopped, so that the chance of blockage by foreign substances is reduced. More specifically, when the two vacuum valves 40 and 60 are opened, the auxiliary vacuum valve 60 opens first.
Can operate in a state where there is no flow of sewage in the vacuum sewage pipe 35. When closing both vacuum valves 40 and 60, the main vacuum valve 40
Is closed first, so that the auxiliary vacuum valve 60 can be operated in a state where there is no flow of wastewater in the vacuum wastewater pipe 35. That is, since the auxiliary vacuum valve 60 can be opened and closed while the flow in the vacuum sewage pipe 35 is stopped, the chance of blockage by foreign substances can be reduced. Although the embodiment of the present invention has been described in detail, the present invention is not limited to this. For example, the order in which the vacuum valves 40 and 60 are installed in series may be reversed. Further, both vacuum valves 40 and 60 may have the same performance. The operation order and control method of the vacuum valves 40 and 60 are not limited to the above embodiment. It is needless to say that the same operation as described above can be obtained even when one of the two vacuum valves 40 and 60 fails and cannot be completely closed due to various reasons other than foreign matter. As described in detail above, according to the present invention, even if a vacuum valve installed in any of the vacuum valve units of the vacuum-type wastewater collecting apparatus breaks down, the vacuum valve is provided. There is no danger that a large amount of air will flow from the vacuum valve unit to be operated, and therefore there is an excellent effect that the function of the entire system of the vacuum-type wastewater collecting apparatus will not be impaired.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vacuum valve unit 1 according to an embodiment of the present invention.
FIG. FIG. 2 is a diagram showing a method of controlling a main vacuum valve 40 and an auxiliary vacuum valve 60 by a vacuum valve controller 80. FIG. 3 is a schematic view showing an example of a vacuum-type wastewater collecting device. [Description of Signs] 10 Vacuum valve unit 20 sewage tank 30 sewage inflow pipe 35 vacuum sewage pipe 40 main vacuum valve 60 auxiliary vacuum valve

Claims (1)

(57) [Claims] [Claim 1] A sewage tank for collecting sewage discharged from homes and facilities, a vacuum sewage pipe introduced into the sewage tank,
A vacuum valve attached to the vacuum sewage pipe, wherein when the sewage in the sewage tank reaches a predetermined amount, the vacuum valve is opened to suck the sewage into the vacuum sewage pipe and discharge it to the outside. A vacuum valve unit, wherein a plurality of the vacuum valves are attached in series to the vacuum sewage pipe.