JPH0743239Y2 - Sewage crushing pumping device - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] This invention is provided in a toilet unit such as an apartment house or a hotel, or in a unit bath, and automatically crushes solids in human waste from a toilet bowl to liquefy sewage, a bathtub, and a washbasin. The present invention relates to a sewage crushing and pressure-feeding device that pressure-feeds together with miscellaneous wastewater from a washing machine and the like to a common pipe.

[0002]

2. Description of the Related Art FIG. 11 and FIG.
It is a conventional human waste crushing and pressure-feeding device disclosed in Japanese Patent No. 9657. In the figure, 1 is a manure crushing pressure-feeding device, 1a is its casing, 2 is a cutter for crushing human waste, 3 is a pump for pumping waste water, 4 is a motor for connecting the cutter 2 and the pump 3 coaxially, and driving them. Is a strainer surrounding the crushing section,
6 is a defecation pipe from the toilet bowl opening in the strainer 5,
Turns on the motor by detecting the water level in the casing 1a
Float switch operated by FF, 8 is a horizontal drain pipe for draining sewage from bathtubs, sinks, washing machines, etc. (the horizontal branch pipe on the right side of the figure is omitted), 9 is a casing for the horizontal drain pipe A flapper valve that is openably and closably attached by a hinge (joint) 12 to an opening 10 in 1a, and a lever 13 that rotates integrally with the flapper valve 9 using the hinge 12 as a fulcrum.
Float fixed to, pumping pipe 14 connected to the discharge port of pump 3, and pumping wastewater to a common vertical pipe, 15 pumping pipe 1
It is a check valve (check valve) provided in No. 4.

13 and 14 show a unit bath 17b of a hotel or the like, a bathroom 17a of an apartment house or the like, a washroom 18a, as sources of miscellaneous wastewater connected by horizontal drain pipes.
In the figure, a toilet 19a (sanitary zone) is shown. In the figure, 16 is a toilet bowl, 1 is a manure crushing and pressure-feeding device attached to the toilet bowl 16, 17 is a bathtub, 18 is a washbasin, and 19 is a washing machine not shown. The pan to be placed, 20 is a horizontal drain pipe provided so that the waste water from the bathtub 17, the washbasin 18, the pan 19 and the like flows into the human waste crushing and pressure-feeding device 1, and 21 is provided in the middle of the horizontal drain pipe. It is a bus and trap.

Next, the operation will be described. When the human waste from the toilet bowl 16 flows through the defecation pipe 6 into the casing 1a at once through the crushing section having the cutter 2 surrounded by the strainer 5, the water level in the casing 1a rises and the float switch 7 exceeds a predetermined water level H. When the fact is detected, the motor 4 is started. As a result, the cutter 2 and the pump 3 are driven, the solid content in the human waste is crushed and liquefied by the cutter 2, passes through the strainer 5, and is discharged to the pressure feed pipe 14 by the pump 3. Further, the check valve 15 prevents the drainage that has been pressure-fed from flowing back into the casing 1a.

[0005] In addition, miscellaneous wastewater such as a washing machine placed on the bathtub 17, the washbasin 18, and the pan 19 also flows in through the horizontal drain pipe 8.
Since it is, once a large amount of raw sewage in the inflow of the gray water is when flowing from the toilet 16, the water level of the inflow is within temporary casing 1a over the discharge capacity of the pump increases rapidly. At this time, the sewage passes through the horizontal drain pipe 8 and the sewage flows into the bathtub 1.
7, in order to prevent backflow of the bread 19, the float 11 with the rise of the water level floats are configured to operate as flapper valve 9 is closed through the lever 13 (see FIG. 12) .

[0006]

Since the conventional sewage crushing and pressure-feeding device is constructed as described above, the drainage system vertical pipe and side branch pipe connected to the discharge-side pressure-feeding pipe 14 of the drainage pressure-feeding pump 3 are provided. , When the horizontal main pipe or drainage basin or the like in the site is connected and opened at a position lower than the pump operating water level H in the casing 1a (see FIG. 11), the pressure in the pipe 14 becomes close to the atmospheric pressure. A phenomenon of sucking air (hereinafter referred to as a siphon phenomenon) occurs, and sucks up residual water in the pressure feed pipe 14 and the casing 1a.

Due to such a siphon phenomenon, there is a problem that the drainage pressure pump 3 causes an airlock and becomes inoperable.

The present invention has been made to solve the above problems, and it includes a pump pipe, a vertical pipe for drainage system, a lateral branch pipe,
An object of the present invention is to provide a sewage crushing pressure-feeding device capable of preventing an air lock of a drainage pressure-feeding pump caused by a siphon phenomenon when a connection such as a horizontal main pipe or a drainage basin in a site is at a low position.

[0009]

A human waste crushing and pressure-feeding device according to the present invention has a large size in a toilet unit or a unit bath.
Crush filth from the toilet bowl, and use the wastewater after crushing the filth as miscellaneous wastewater
A pump that pumps together and is connected to the discharge side of this pump.
With a pressure feed pipe and an intake valve assembled in the middle of this pressure feed pipe
And a check valve with a suction valve,
For the valve box that connects the primary-side pressure feeding pipe and the secondary-side pressure feeding pipe
Built-in, and when the pump is stopped
A ball valve that closes the pressure feed pipe and the valve box attached to the front
When the pump is stopped, the ball valve causes the primary side pressure feeding pipe to move.
When the valve is closed, it is opened by the negative pressure generated in the secondary side pressure feeding pipe.
Open the valve box and the secondary side pressure feeding pipe to the atmosphere.
Release to about atmospheric pressure and drain by starting the pump
With an intake valve that closes when pumped
is there.

[0010]

In the apparatus for crushing human waste crushing according to the present invention, when the pump for pumping wastewater is automatically started to pump wastewater, the pumping pipe is in a positive pressure full flow state as described above. On the other hand, immediately after the pump is stopped, the pump outlet side, that is, the valve box of the check valve and the inside of the pressure feeding pipe are in a negative pressure state for the next reason. The flow rate of drainage does not become zero immediately after the pump is stopped, but the flow continues for several seconds due to the inertia of the rotating part of the pump and the wastewater itself. At this time, the inside of the pump outlet side drain pipe has a pressure (negative pressure) lower than the internal pressure (atmospheric pressure) of the tank according to Bernoulli's theorem.

[0011] For example, if the drain pipe inside diameter d = 20 mm = the 0.02m pump stop immediately after the waste water discharge flow rate Q = 30 l / min = 1.8m 3 / h, drainage pipe cross-sectional area A = πd ^{2/4 = π × 0.02 2/4 =} 0.000314m 2 flow rate of the drainage tube V = Q / a = 1.8 / 0.000314 = 5732m / h = 1.59m / sec Hence, the density of the waste water discharge [rho = 1 , Acceleration of gravity g =
If it is set to 9.8 m / sec ² , the pressure in the drainage pipe is derived from Bernoulli's theorem, and the pressure in the pipe P = −V ² /2g=−1.59 ² /(2×9.8) = −0 A negative pressure of .129 m = -129 mm (head pressure) is generated. Since a larger negative pressure is generated inside the check valve valve box and in the pumping pipe, the present invention installs an intake valve on the outlet side of the check valve, so that when the siphon phenomenon occurs, the intake valve is affected by negative pressure. Open it and let the inside of the pipe be in a substantially atmospheric state to prevent the air lock of the pump.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same or corresponding parts as those in FIGS. 11 to 14 are designated by the same reference numerals to omit redundant description. Figure 1
The check valve 15 shown in FIG.
It is assembled in the middle of the pressure feeding pipe 14 in FIG.

In the valve box 150 of the check valve 15, the lower end opening is connected to the discharge port of the drainage pump 3 via the flexible primary side pressure feeding pipe 14A, and the upper end opening is secondary. The side pressure supply pipe 14B is connected to the abdomen, and an atmosphere opening port (hereinafter referred to as abdomen opening port) 151 is integrally formed in the abdomen as shown in the figure.

The valve box 150 has an abdominal opening 1
It incorporates a ball valve 152 which is turned on from 51. The ball valve 152 is lowered by its own weight when the drainage pressure pump 3 is stopped, and closes the connection port of the primary side pressure pipe 14A.
As a result, the inside of the valve box 150 and the secondary side pressure feeding pipe 14B
It prevents the waste water in the inside from flowing back into the casing 1a in FIG.

Also, the abdomen opening port 151 of the valve box 150.
A lid 22 having an intake port 22a for opening to the atmosphere is detachably screwed through a gasket 23, and an intake valve unit 24 is attached and set in the lid 22.

As shown in FIGS. 2 and 3, the intake valve unit 24 has a through-cylindrical housing 240 fitted in the lid 22 via an O-ring 25, and a fitting insertion in the housing 240. The intake valve body 242 that opens and closes the intake port 22a, the O-ring 244 fitted to the outer periphery of the intake valve body 242, and the valve rod 2 integrated with the intake valve body 242.
43 is slidably fitted into the housing 240 and is closed in the lid 22 by a retaining ring 26 (see FIG. 1) and the intake valve body 242 is closed. And a spring (biasing means) 245 for biasing the direction.

The valve closing load of the intake valve body 242 by the spring 245 is 50-100 in the valve box 150.
When the negative pressure of mmH ² O is reached, the intake valve body 242 is opened by the atmospheric pressure from the intake port 22a, and the valve is kept open to introduce air as shown in FIG.

Therefore, if the drainage pressure pump 3 is stopped,
Immediately thereafter, the intake valve body 242 is directly opened by the negative pressure generated in the valve box 150 of the check valve 15 as described above, whereby air can be naturally introduced into the valve box 150. As the intake valve unit 24, an inexpensive commercial product can be used.

FIG. 6 is a sectional view of a check valve with an intake valve used in an experiment as another embodiment of the present invention. The check valve 15 used in this experiment is a straight tubular valve box 150.
And an intake pipe 151A integrally connected to the abdomen of the valve box 150 and communicating with the inside thereof are formed of a transparent acrylic resin that allows the inside to be easily seen through. Then, the check valve 15
Fig. 8 shows the pressure feed pipes 14A, 14 of the human waste crushing pressure feed device 1.
A specific experiment was carried out by observing the inside of the check valve 15 by incorporating it in the space B. As a result of this experiment, air in the atmosphere was introduced from the intake valve unit 24 into the valve box 150 immediately after the drainage pressure pump 3 was stopped, and the siphon phenomenon did not occur at all.

When a similar experiment was performed on the conventional check valve 15 of FIG. 11, a siphon phenomenon occurred and all the water in the casing 1a flowed out.

FIG. 9 shows a conventional check valve 15 according to the above experiment.
(FIG. 11) and the pressure P immediately after the outlet side of the check valve 15 (FIG. 6) of the present invention (in the secondary side pressure feeding pipe 14B) are measured and compared. As is clear from this, the conventional check valve 1
The sewage crushing pressure-feeding device using No. 5 causes a large negative pressure and a siphon phenomenon occurs, and the sewage crushing pressure-feeding device equipped with the check valve 15 of the present invention immediately becomes atmospheric pressure by the operation of the intake valve unit 24. This proves that the siphon phenomenon was prevented.

In the above experimental results, the intake valve unit 2
When the atmosphere was introduced from 4, the atmospheric pressure discharged the waste water in the pressure-feeding pipe 14B at a considerably high speed. The reason why wastewater is discharged at such a high speed is as follows. That is, wastewater is an incompressible fluid and is close to water,
The air, which is the atmosphere, is a compressible fluid, so the intake valve unit 2
4 is inhaled and enters the negative pressure valve box 150 to expand. This expansion pushes and accelerates the waste water, and the movement of the waste water due to this acceleration causes a synergistic effect that the negative pressure in the valve housing 150 of the check valve 15 further increases. The wastewater drainage speed from the secondary side pressure feeding pipe 14B immediately before the pump 3 was stopped was visually about 1 to 2 m / sec or less, but the wastewater drainage flow velocity when air was introduced from the intake valve unit 24 was about several. It was discharged from the secondary pressure feeding pipe 14B at a speed of m to several tens of m / sec.

Since the inside of the flexible pressure-feeding pipes 14A and 14B is cleaned by the high-speed movement of such wastewater and the introduction of air, it is possible to prevent the accumulation of waste, and the thin flexure which is the purpose of the human waste crushing and pressure-feeding device 1. The adoption of the sexual pressure feeding pipe can be effectively implemented.

Every time the drainage pressure pump 3 of the present invention is stopped, waste water from the check valve 15 to the collecting vertical pipe (not shown) to which the pressure feed pipe 14B is connected disappears, but the check valve 15 from the casing 1a disappears. Since the wastewater discharged up to 1 remains, the odor in the collecting vertical pipe does not return to the inside of the casing 1a.

In the above embodiment, the intake valve unit 2
4 is attached to the lid 22, but the valve box 1 is separated from the lid 22.
A suitable seat may be provided on 50 for mounting. Further, the same effect can be obtained even if an appropriate T-shaped joint is provided and the intake valve unit 24 is mounted near the outlet side of the check valve 15.

Normally, the check valve 15 is provided inside the casing 1a, but the check valve 15 may be provided outside the casing 1a because of the space of the casing 1a.
In this case, the intake port 22a may be connected to the upper portion of the casing 1a in order to deal with the case where the intake valve body 242 leaks due to dust or paper.

[0027]

[Effect of the Invention] As described above, according to the present invention, human waste is collected.
Discharge side of pump for drainage pressure pump with crushing function for filth etc.
Check valve with intake valve in the middle of the pressure pipe connected to
Assembled, this check valve is the primary side pressure feeding pipe of the pressure feeding pipe.
It is built in the valve box that connects the
When it is stopped, it simply drops its own weight to block the primary side pressure feeding pipe.
Since it consists of only a ball valve, the number of check valve parts can be reduced.
It can be minimized and its configuration is simple and easy
It Moreover, the valve box has a ball valve when the pump is stopped.
When the primary side pressure feeding pipe is blocked by the inside of the secondary side pressure feeding pipe
The negative pressure generated in the valve opens the valve inside the valve box and the secondary side.
Open the pressure-feeding pipe to the atmosphere to bring it to about atmospheric pressure, and
An intake valve that closes when drainage is pumped
Therefore, the siphon phenomenon can be prevented and the drainage pump
There is an effect that the air lock of can be surely prevented. Well
And, effective siphon effect empty pipe and became pumping tube drainage system via the standpipe, Yokoedakan, that can also prevent backflow of elevated come sewer gases from such horizontal main pipe or catch basins
There is a fruit. Moreover, not only can the original purpose of the human waste crushing and pressure-feeding device that reduces the diameter of the pressure-feeding pipe be further achieved by making it possible to freely select the piping route of the pressure-feeding pipe such as the ceiling or the underfloor, etc. There is an effect that the layout of the water area of the housing complex and the layout of the toilets and hot water room of the general building can be freely arranged, and the water areas of the existing buildings can be easily added .

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a check valve with an intake valve assembled in a drainage pumping system passage of a human waste crushing pumping apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a closed state of the intake valve unit in FIG.

FIG. 3 is a sectional view showing a valve open state of the intake valve unit of FIG.

4 is a cross-sectional view taken along the line AA of FIG.

5 is a sectional view taken along line BB of FIG.

FIG. 6 is a sectional view showing a check valve with an intake valve used in an experiment as another embodiment of the present invention.

7 is a cross-sectional view taken along line CC of FIG.

FIG. 8 is a piping diagram used for an experiment of the human waste crushing and pressure-feeding device according to the present invention.

9 is a characteristic diagram of the results of measurement and comparison of discharge side pressures of the conventional check valve and the check valve of the present invention according to the experiment of FIG.

10 is a cross-sectional view taken along the line DD of FIG.

FIG. 11 is a cross-sectional view showing a conventional human waste crushing and pressure-feeding device.

FIG. 12 is an operation explanatory view of the flapper valve in the conventional human waste crushing and pressure-feeding device.

FIG. 13 is a piping diagram of a miscellaneous drainage system of a unit bath in which the human waste crushing and pressure-feeding device of FIG. 11 is incorporated.

FIG. 14 is a schematic diagram of a miscellaneous drainage system in a sanitary zone in which the human waste crushing and pressure-feeding device of FIG. 11 is incorporated.

[Explanation of symbols]

 1 Sewage crushing pressure feeding device 3 Drainage pressure feeding pump 14A Pressure feeding pipe 14B Pressure feeding pipe (secondary pressure feeding pipe) 15 Check valve 16 Toilet bowl 17 Bath tub 18 Washbasin 24 Intake valve unit

Claims (1)

[Scope of utility model registration request] 1. A sewage is crushed from a toilet bowl in a toilet unit or a unit bath, and the crushed sewage is set as a set in the toilet bowl so that the sewage can be drained together with miscellaneous drainage from a washing machine, etc. In the provided manure crushing pressure-feeding device, a pump for pressure-feeding the wastewater after crushing the waste together with the miscellaneous wastewater, and a pressure-feeding pipe connected to the discharge side of the pump.
And a non-return valve with an intake valve installed in the middle of this pressure pipe.
And a check valve with an intake valve,
It is built in the valve box that connects the primary side pressure feeding pipe and the secondary side pressure feeding pipe.
When the pump is stopped, the weight of the pump is lowered and
Ball valve to be closed, and the pump of the pump attached to the valve box
When stopped, the ball valve closed the primary side pressure feeding pipe.
When the valve is opened by the negative pressure generated in the secondary side pressure feeding pipe,
Open the inside of the valve box and the secondary pressure feeding pipe to the atmosphere, and
Pressure, and closes when draining water is pumped by starting the pump
A sewage crushing and pumping device, which is characterized by comprising an inhalation valve for valve operation .