JPS60118218A - Deodorizing apparatus for feces tank truck - Google Patents

Abstract

PURPOSE:To prevent the discharge of a deodorizing solution by eliminating the damage of a deodorizing mechanism, by communicating the deodorizing mechanism with a feces tank through a two-way change-over valve while blocking the communication of said feces tank with the deodorizing mechanism at the time of the communication of said tank with the open air. CONSTITUTION:A two-way change-over valve 4 is provided to the flowline from a feces tank to a deodorizing mechanism 1. When the inner cylinder 6 of the two-way change-over valve 6 is brought to a falling position, an upper side orifice 6c is closed while a lower side orifice 6b is positioned so as to correspond to a suction pipe 2 and the offensive smell from the feces tank is passed through the deodorizing mechanism 1 to be deodorized. When the feces tank is pressurized, the inner cylinder 6 is raised by a handle part 7a to be engaged with an engaging part 5c and the lower side orifice 6b is closed while the upper side orifice 6c is exposed to communicate the feces tank with the open air and the back flow of air in the deodorizing mechanism 1 is inhibited. Because the lower side orifice 6b is closed and the upper side orifice 6c is opened to the open air when the compressed air in the feces tank is exhausted, the air exhausted from the feces tank is not blown through the deodorizing mechanism 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deodorizing device for a vacuum vehicle, and more particularly, the present invention relates to a deodorizing device for a vacuum vehicle, and more specifically, a deodorizing device that connects a vacuum tank to the atmosphere when pressurizing the inside of the vacuum tank or exhausting pressurized air. This invention relates to a vacuum car deodorizing device that prevents damage to a deodorizing mechanism and consumption of a deodorizing liquid by blocking internal ventilation.

Vacuum trucks that pump up excrement and urine create negative pressure in the vacuum tank, suck in the excrement, and pass the exhaust gas through a deodorizing mechanism to deodorize it.

However, when releasing excrement from the vacuum tank,
Or when a foreign object gets stuck in the port while pumping,
The inside of the vacuum tank is pressurized, but at this time air flows back inside the deodorizing mechanism, and in the case of a deodorizing mechanism that uses deodorizing liquid to deodorize, the deodorizing liquid will flow out.

In addition, unless the pressurized air in the vacuum tank is discharged and returned to atmospheric pressure, the next volume of excrement cannot be pumped out, and the pressurized air is generally discharged rapidly. The exhaust gas blows through the deodorizing mechanism, damaging the deodorizing mechanism or even discharging the deodorizing liquid.

Conventionally, means for preventing backflow within the deodorizing mechanism include:
There is a backflow prevention means that uses a check valve that closes off the deodorizing flow path of the deodorizing mechanism when the vacuum tank is pressurized, and a check valve that allows the vacuum tank to communicate with the atmosphere at this time. However, the operation of these valves is unreliable, and there is a drawback that backflow is not necessarily prevented, so that discharge of the deodorizing liquid cannot be reliably prevented.

In addition, in order to prevent blow-through in the deodorizing mechanism, a check valve that communicates the vacuum tank with the atmosphere among the check valves is held in an open state to prevent blow-through. Since the pressurized air is rapidly discharged, a portion of the air also blows through the inside of the deodorizing device, and damage to the deodorizing mechanism and discharge of the deodorizing liquid cannot be sufficiently and reliably prevented.

The present invention has been made in view of the above-mentioned difficulties, and its purpose is to eliminate backflow and rapid blow-through in the deodorizing mechanism, and to provide a vacuum vehicle vehicle that prevents damage to the deodorizing mechanism and discharge of deodorizing liquid. To provide a deodorizing device, its features include providing an atmosphere communication path in the flow path from the vacuum tank to the deodorizing mechanism, and providing a three-way switching valve to switch communication between the flow path to the deodorizing mechanism and the atmosphere communication path. It is where it is made up of.

Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings.

1 is the deodorizing mechanism, which consists of an aeration chamber that deodorizes odors by contacting them with a deodorizing liquid, and a water separation chamber that condenses the atomized deodorizing liquid so that the deodorizing liquid is not discharged to the outside. Ru. 2
is an intake pipe that leads odor into the aeration chamber. 3 is a check valve that closes the suction pipe 2 when air flows back from the aeration chamber.

4 is a three-way switching valve, which is composed of an outer cylinder 5 and an inner cylinder 6 that slides into the outer cylinder 5 and moves up and down.

The outer cylinder 5 is formed of a T-shaped tube that opens at the upper and lower ends and at the circumferential surface, and the lower end opening communicates with the vacuum tank, and the circumferential opening communicates with the intake pipe 2.

Further, a protrusion 5a is formed on the inner peripheral surface of the outer cylinder 5 near the lower end to support the inner cylinder 6 in the lowered position.

The upper end opening of the inner cylinder 6 is closed by a check valve 6a, and a lower hole 6b and an upper hole 6C are bored at different height positions on the circumferential surface. The check valve 6a opens when the inside of the inner cylinder 6 becomes negative pressure,
The sound is generated by the vibration of the incoming air.

Further, the lower hole 6b is positioned corresponding to the opening on the peripheral surface of the outer cylinder 5 when the inner cylinder 6 is in the lowered position, and is closed by the peripheral wall of the outer cylinder 5 when the inner cylinder 6 is in the raised position. The upper hole 6C is closed by the circumferential wall of the outer cylinder 5 when the inner cylinder 6 is in the lowered position, and is exposed from the upper opening of the outer cylinder 5 when the inner cylinder 6 is in the upper position. Located above.

In order to move the inner cylinder 6 up and down within the outer cylinder 5, an engaging part 6d protruding from the outer circumferential surface near the upper end of the inner cylinder 6 is rotatably attached to the retaining part 6d, and the outer circumference of the outer cylinder 5 is rotated. The inner cylinder 6 is moved vertically by a slide rod 7 guided by a guide ring 5b provided on the surface, and the slide rod 7 is moved in the raised position.
A handle portion 7a protruding from the circumferential surface of the outer cylinder 5 is engaged with and supported by a locking portion 5C protruding from the circumferential surface of the outer cylinder 5.

In this configuration, if the inner cylinder 6 is in the lowered position, the upper hole 6
C is closed, the lower hole 6b is positioned corresponding to the intake pipe 2, and the odor from the vacuum tank passes through the deodorizing mechanism 1 and is deodorized.

Next, when pressurizing the inside of the vacuum tank, lift the inner cylinder 6 upward with the handle part 7a and lock it with the handle part 7a and the locking part 5C, the lower hole 6b is closed and the upper hole 6c is connected to the outer cylinder 5. The vacuum tank is exposed to the atmosphere and the deodorizing mechanism is
Reliably prevents backflow of air inside.

In addition, if you forget to set the above-mentioned inner m6 to the raised position when pressurizing the vacuum tank, the check valve 3 in the deodorizing mechanism 1 is closed, and the check valve 6a at the upper end of the inner cylinder 6 is opened. , air flows into the vacuum tank through the check valve 6a, and at this time the check valve 6a makes a sound to notify that the three-way switching valve 4 is not switched. Hearing this sound, the operator can move the inner cylinder 6 to the raised position and communicate the vacuum tank with the atmosphere.

Next, when the pressurized air in the vacuum tank is to be discharged, the inner cylinder 6 is already in the raised position, the lower hole 6b is closed and the upper hole 6c is open to the atmosphere, so that the vacuum tank can be discharged from the vacuum tank. Even if the exhaust gas is sudden, it will not blow through the inside of the deodorizing mechanism 1.

However, after the vacuum tank was evacuated,
When the slide rod 7 is rotated by moving the handle part 7a with fingers, the handle part 7a separates from the locking part 5c, the inner cylinder 6 descends to the lowered position by its own weight, and the vacuum tank communicates with the deodorizing mechanism 1. That will happen.

In addition, in the above-mentioned embodiment, a structure was explained in which the flow path is switched by moving the inner cylinder 6 up and down, but the structure is not limited to this; the flow path may be changed by rotating the inner cylinder, and the movement of the inner cylinder is also possible. It is not limited to the fingers, but may be linked to a mechanism that switches the inside of the vacuum tank between a depressurized state and a pressurized state, for example.

Thus, according to the present invention, the deodorizing mechanism is communicated with the vacuum tank via the three-way switching valve, and when the vacuum tank is communicated with the atmosphere, communication with the deodorizing mechanism is completely cut off, and the vacuum tank is Since the ventilation inside the deodorizing mechanism is cut off when the pressurized air is pressurized or the pressurized air is rapidly exhausted, the deodorizing mechanism is not damaged and the deodorizing liquid is not discharged.

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view when the inner cylinder is in the lowered position, and FIG. 2 is a side view when the inner cylinder is in the raised position. 1... Deodorizing mechanism, 2... Intake pipe, 3... Check valve,
4...Three-way switching valve, 5...Outer cylinder, 5a...Protrusion, 5b...Guide ring, 5c...Locking part, 6
・−・Inner cylinder. 6a...Check valve, 6b...Lower hole, 5c...
Upper hole, 6d... Engaging portion, 7... Slide rod,
7a...handle part. Patent Applicant Co., Ltd. Hoshino Representative Sei Hoshino - Figure 1 Figure 2

Claims (1)

[Claims] 1. A deodorizing device for a vacuum vehicle, which includes an atmosphere communication path in the flow path from the vacuum tank to the deodorization mechanism, and a three-way switching valve that switches communication between the flow path to the deodorization mechanism and the atmosphere communication path.