JPH0315673Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a vacuum type tank used for collecting and discharging liquids such as excrement and urine.

(Prior Art) In general, this type of vacuum tank, as shown in Fig. 1, includes a tank body 1 that stores liquid such as excrement and urine, and a blower that pressurizes or depressurizes the inside of the body 1. a pressure supply source 2, etc., and
An overflow prevention device 3 installed on the upper part of the tank body 1 to prevent liquid from overflowing from the tank body 1; one end connected to the pressure supply source 2 and the other end connected to the overflow prevention device 3; It has a piping system 4 that is connected to the tank body 1 in a communicating state, and in order to suck in liquid such as excrement, a hose (not shown) is connected to a suction/discharge valve 5 provided at the bottom at the rear end of the tank body 1. Connect one end and put the other end into the liquid, activate the pressure supply source 2, and press the tank body 1.
When the inside is brought into a reduced pressure state, liquid will be sucked into the main body 1 via the suction/discharge valve 5. When the tank body 1 becomes full and the liquid overflows, the overflow prevention device 3 is activated and the other end of the piping system 4 is blocked, causing the liquid to overflow from the tank body 1 and pressurize the tank. It never reaches source 2.

Contrary to the above, in order to discharge or spray the liquid in the tank body 1, remove the hose from the intake/discharge valve 5 and install the spray device 6 on the same valve 5, then turn the pressure supply source 2 on for pressurization. All that is required is to switch the operation and pressurize the inside of the tank body 1. By doing so, the liquid can be directly discharged from the intake/discharge valve or sprayed from the spraying device 6.

By the way, during long-term use of such a vacuum type tank, deposits 7 will accumulate near the suction and discharge valve 5 at the rear of the tank body 1, as shown in the figure, and this deposit 7 will prevent the suction and discharge of liquid. Since the flow path leading to the valve 5 is blocked, suction and discharge capabilities are significantly reduced.

Therefore, in the past, the rear end of the tank body 1 had an open hatch that could be opened and closed, and the accumulated sediment was removed manually.

(Purpose of the invention) The present invention was devised in view of the above-mentioned problems, and its purpose is to automatically remove sediment within the tank body.

(Structure of the invention) The invention consists of a tank body, a pressurized supply source for pressurizing or depressurizing the inside of the tank body, and a pressurizing supply source installed on the top of the tank body to prevent liquid from overflowing from the tank body. In a vacuum type tank, the tank has an overflow prevention device and a piping system having one end connected to the pressure supply source and the other end connected in communication with the tank body via the overflow prevention device, An air jet pipe having a through hole in the peripheral wall is installed at the bottom of the tank body, and one end of the pipe is connected to a branch line branched from the piping system, and further piping is connected between the branch point and the tank body. The system is provided with a check valve that prevents air flow from the pressure supply source toward the tank body, and
By providing the branch passage with a check valve that prevents the flow of air from the tank body toward the pressure supply source, pressurized air is sent to the branch passage when the tank body is pressurized during discharge, that is, when the tank body is pressurized. Introduced into the spout pipe,
By blowing out pressurized air from the holes in the pipe, the sediment that has accumulated at the bottom of the tank body is lifted up and dispersed while being stirred, and the sediment is discharged together with the liquid.

(Example) The present invention will be described below with reference to an example shown in the drawings. As shown in FIG. A pressure supply source 12 such as a blower is installed, and the tank body 10 and the pressure supply source 12
and are connected by a piping system 13. An overflow prevention device 14 is provided at the top of the tank body 10 to prevent liquid from overflowing from the tank body 10.
is installed, and the piping system 13 is connected to the equipment 1.
4 to the tank body 10.

There are various types of this device 14, but the principle is that when an overflow occurs, the check valve 16 is actuated by a float 15 that moves up and down with the liquid level under the buoyancy of the liquid in the tank body 10. The purpose is to prevent liquid from overflowing into the piping system 13 by closing the piping system 13 with the same valve 16.

An air jet pipe 17 extending along the longitudinal direction of the tank body 10 is installed at the bottom of the tank body 10, and one end of the pipe 17 is connected to a branch path 18 branched from the piping system 13. has been done. The peripheral wall of the pipe 17 has a large number of through holes 17.
Pressurized air is ejected from these through holes 17a, and the preferable location of the holes 17a is at the bottom of the air ejection pipe 17, as shown in FIG. 3a. By setting in such a position, the pressurized air is injected downward, and as a result, for the same amount of air, the ability to stir the sediment is increased.

Of course, if the pressure supply source 12 has sufficient capacity and the amount of air is large, it may be provided not only at the bottom but also at the top and side of the air jet pipe 17, as shown in FIG.

The branch passage 18 to which the air jet pipe 17 is connected is provided with a check valve 19a as shown in FIG. 4 that allows air to flow in only one direction from the pressure supply source 12 toward the tank body 10. There is. That is,
In the middle of the branch passage 18, a flange 20a is attached to one end of the branch passage 18, and a valve holder 20b is attached to the other end, and a check valve 21 is provided within the valve holder 20. Same valve 21
is resiliently biased toward the flange 20a by a spring 22 provided in the valve receiver 20b, and when no external force is acting on the valve 21,
The valve plate 21a of the valve 21 is in contact with the flange 20a. In other words, the flange 20a constitutes a valve seat. A spring 22 is attached to this check valve 21.
When a force is applied in the direction of compressing the valve 2,
1 is separated from the flange 20a, and the valve stem 21b enters the other branch path. The check valve 19a is preferably provided at the top of the branch passage 18 or closer to the tank body 10 than the top. The reason for this is that when there is a residual amount of liquid in the tank body 10 at the time of discharge, and when moving to another cylinder, the operation of the pressure supply source 12 is stopped, but immediately after stopping, the inside of the tank body 10 is still pressurized. Therefore, liquid may flow into the branch passage 18 during the shock when the operation is stopped, and in this case, the check valve 19a
When the liquid is located closer to the piping system 13 than the top of the branch passage 18, the liquid is stored between the top of the branch passage 18 and the check valve 19a, as shown in FIG. 5, and a stored liquid D is generated. , When moving to the next discharge in this state, the check valve 21 is opened by the action of pressurized air.
This is because there is a possibility that liquid may flow into the pressure supply source 12 when the flange 20a separates from the flange 20a. At this point, if the check valve 19a is in the position shown in FIG.
The above phenomenon does not occur because the liquid flows down into the tank body 10 due to its own weight.

Such a check valve is also provided in the piping system 13. That is, the check valve 19b of the piping system 13 is for blocking pressurized air from flowing toward the tank body 10 from the pressure supply source 12.
By installing b, the pressurized air from the pressure supply source 12 flows only into the branch path 18, and therefore the pressurized air can be concentrated in the air jet pipe 17.

By the way, as shown in FIG. 2, the branch road 18 is T
It is branched from the piping system 13 by a branch pipe 23 of the shape, but it is preferable to use a water absorption prevention device 24 shown in FIG. 6 instead of the pipe 23. The reason for this is that liquids such as excrement and urine, unlike fresh water, contain proteins, ammonia, etc.
If the inside of the tank body 10 is reduced in pressure during suction, air bubbles are likely to be generated, and therefore air bubbles may enter the piping system 13 before the inside of the tank body 10 is full, that is, before the overflow prevention device 14 is activated. Or, when the pressure supply source 12 is stopped during discharging such as spraying, liquid may flow into the piping system 13 due to the shock, and the air bubbles or liquid that enters the piping system 13 may be removed from the pressure supply source. It will reach 12. Therefore, it is necessary to liquefy such bubbles and store the liquefied liquid or the liquid that directly flows in before the pressure supply source 12. The water absorption prevention device 24
is provided for this purpose, and is installed between the check valve 19b of the piping system 13 and the pressure supply source 12,
The branch line 18 is connected to the piping system 1 via the water absorption prevention device 24.
Branched from 3. This water absorption prevention device 24 has a float chamber 26 in which a float 25 is housed.
and an outlet 27 provided at the top of the same room 26,
It consists of a check valve 28 that closes the outflow port 27 when the float 25 rises, and when liquid accumulates in the float chamber 26 and the liquid level rises, the float 25
is also beginning to rise accordingly. When the above air bubbles enter the float chamber 26, the piping system 13
Because it is placed under reduced pressure compared to
It will be stored within 6.

A suction valve 29 and a discharge valve 30 are provided on the rear end surface of the tank body 10, and a spraying device 31 used for spraying can be attached to the discharge valve 30.

In addition, in Fig. 2, 32 is an intake/exhaust four-way valve, 33
is a handle for switching the four-way valve 32.

Next, to describe the operation of the vacuum type tank according to the above configuration, first, when suction is performed, the discharge valve 30 is closed, the suction valve 29 is opened, and the pressure supply source 12 is set to the suction function.
The air inside the tank body 10 is sucked in the direction of arrow A, resulting in a reduced pressure state, and the liquid is sucked into the tank body 10. When the inside of the main body 10 becomes full, the overflow prevention device 14 is activated to prevent liquid from flowing into the piping system 13.

When discharging or spraying in the opposite manner to the above, switch the pressure supply source 12, close the suction valve 29,
When the discharge valve 30 is opened and the pressure supply source 12 is activated, pressurized air is sent in the direction of arrow B and is supplied to the air jet pipe 17 via the piping system 13 and a branch path 18 branching from the piping system 13. , the liquid within the main body 10 will be drained. On this occasion,
Pressurized air is jetted out from the through hole 17a of the air jet pipe 17, and the jetting force agitates the sediment at the bottom of the tank body 10 and discharges it together with the liquid.

(Effects of the invention) Since the invention is as described above, even if sediment accumulates inside the tank body during long-term use,
Because the sediment is stirred by the air jet force,
Since it is discharged together with the liquid, the liquid flow path will not be blocked by sediment, and therefore the suction and discharge capacity will not be reduced.

Moreover, as mentioned above, the discharge of sediment is always carried out automatically during discharge or spraying, so there is no need to provide a rear open hatch at the rear end of the tank body as in the conventional case, and there is no need to manually dispose of the sediment. This also saves the trouble of removing precipitates.

[Brief explanation of the drawing]

Figure 1 is a side view of a conventional tank, Figure 2 is a side view of a tank according to the present invention, Figures 3a and b are schematic sectional views showing two examples of air jet pipes, and Figure 4 is a reverse view. FIG. 5 is a schematic cross-sectional view of the stop valve, FIG. 5 is an explanatory view showing a backflow state of liquid, and FIG. 6 is a cross-sectional view of the water absorption prevention device. 10...Tank body, 12...Pressure supply source, 1
3... Piping system, 14... Overflow prevention device, 17...
Air blowout pipe, 17a...through hole, 18...branch path, 29...intake valve, 30...exhaust valve.

Claims (1)

[Claims for Utility Model Registration] (1) A tank body having an intake and exhaust valve, a pressure supply source for pressurizing or depressurizing the inside of the tank body, and a pressure supply source installed on the upper part of the tank body and connected to the tank body. A vacuum type tank having an overflow prevention device for preventing liquid overflow, and a piping system having one end connected to the pressure supply source and the other end connected to the tank body via the overflow prevention device. At the bottom of the tank body, an air jet pipe having a through hole in the peripheral wall is installed, and one end of the pipe is connected to a branch line branched from the piping system, and further, a connection between the branch point and the tank body is installed. A check valve that prevents the flow of air from the pressure supply source toward the tank body is provided in the piping system between the pipes, and the branch path allows air to flow in only one direction from the pressure supply source toward the tank body. A vacuum type tank characterized by being equipped with a check valve. (2) The vacuum type tank according to claim 1, wherein the check valve provided in the branch path is located at the top of the branch path or closer to the tank body than the top.