JPH07139027A - Suction device - Google Patents

Abstract

PURPOSE: To create a suction system preventing the contamination of environment when the external side face of a suction head is separated from an egesta housing tank by cleaning the external side face. CONSTITUTION: The suction system for emptying a tank, in which a toilet egesta or the like is housed, has a tubular suction head 33 temporarily inserted into the tank. A suction mechanism 4 for generating partial vacuum in the suction head 33, a suction duct 39 connecting the inside of the suction head 33 for transporting the contents of the tank to a receiving means to the suction mechanism 4, and a means 28 supplying the suction head 33 with a cleaning liquid are mounted. The means 28 supplying the cleaning liquid has a nozzle device 38 arranged so that the cleaning liquid is introduced extending over the considerable length of the external side face of the head for cleaning the head 33 before the suction head 33 is separated from the tank.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a suction device according to the preamble of claim 1.

The suction device according to the invention is especially intended for emptying toilet excrement collection tanks of trailer houses, touring cars, buses, boats and the like. A preferred embodiment of the present suction device is suitable for year-round use, meaning that the excreted product can be sent directly to the sewer main or to a human waste collection tank, meaning "online".
Work as a device. If there is no such receiving means in the vicinity of the suction device, an auxiliary collecting tank can be added to the suction device.

[0003]

BACKGROUND OF THE INVENTION Patent publication DE 3020538-A1 discloses a suction device for emptying sewer mains and other underground ducts. This device has a cleaning mechanism that reduces the density of the substance to be sucked out and breaks down hard deposits and the like. The cleaning water is guided to a ring nozzle arranged at the tip of the suction head. Therefore, the wash water does not wash or purify the outer surface of the suction head itself.

It is an object of the present invention to temporarily insert the inside of a toilet waste storage tank or the like to empty the tank by suction and at the same time clean the tank and clean the suction head so that it is reasonably clean. And to create a suction device that does not pollute the environment when it is removed from the tank.

[0005]

The object of the present invention is to claim 1.
It is achieved by the means described in. Since the nozzle device for the cleaning liquid is arranged at a distance from the end of the suction head, the flow of cleaning liquid is provided to flow towards the free end of the suction head. Therefore, the wash liquid flows along the outer surface of the suction head to clean it. The cleaning distance of the suction head is preferably such that the cleaning nozzle device is in normal use never below the surface of the excrement in the tank. In order to achieve effective cleaning of the outer surface of the suction head, the cleaning distance should not be too long. 3 as the maximum length
0 cm is recommended.

In a preferred embodiment of the invention, the nozzle arrangement comprises one ring nozzle or a number of nozzles for distributing the washing liquid substantially evenly over the entire outer area of the suction head.

It is practical to provide a suction device with a valve member that promotes the action of the suction force on the contents of the tank when opened and prevents the backflow of sucked excrement when closed. is there. This simplifies the use of the suction device. The valve member is preferably located close to the suction head. This effectively prevents backflow and drop from the suction head. It is convenient to use a vacuum actuated valve member that is moved by the vacuum used in the suction device.

The valve member and the cleaning liquid supply means are preferably manually controlled. The manual controls for both functions are located close to each other. This arrangement facilitates easy control and effective and proper use of the suction device.

The valve member and the cleaning liquid supply means are preferably controllable independently of each other. Thus, the suction force can be used without the cleaning liquid, or vice versa. At the end of the emptying process, it is often advantageous to use a cleaning liquid for cleaning the emptied tank and at the same time for cleaning the outer area of the suction head. It may be advantageous to leave a small amount of clean flush water in the tank after the emptying process is complete.

The tank contents are preferably arranged to flow through a suction mechanism such as a vacuum pump which produces the partial vacuum required for suction. It is recommended to use a liquid ring pump with a disintegrator on its suction side as the vacuum generator. Such pumps are capable of disintegrating the aspirated waste to make it relatively homogeneous, which is advantageous for subsequent transportation and processing. It is structurally very easy to connect the disintegrator to the liquid ring pump in the same pump unit. Preferably a liquid ring pump with a spiral pump impeller is used. The disintegrator is then arranged at the front end of the impeller as an integral part of the impeller.

A heater is coupled to the suction mechanism to prevent freezing of the suction mechanism. A suction duct through which the excrement is sucked and a duct for cleaning liquid are arranged inside the common protective hose, and also a duct for blowing in warm air emanating from a heater or other heat source. Be done. This prevents freezing of the fluid in the hose in cold weather.

In the following, the invention will be explained in more detail with reference to the accompanying drawings.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, reference numeral 35 indicates a power / control unit of a suction device according to the present invention. The power / control unit 35 has an insulated enclosure 1. An electric control unit 2 and a water ring spiral impeller pump 4 driven by an electric motor 3 are arranged inside the outer enclosure 1. The water pipe must be connected to the flange 12. A heater 18, an air fan 17, and a thermostat 19 are arranged to heat the inside of the outer enclosure 1. The suction side of the pump 4 is connected to the suction duct 29 in the flexible hose 34 via the pipe 9 and the flange 22. The discharge side of the pump 4 is connected to a tank 5 through a pipe 7, which also serves as a reservoir for pump sealing liquid. The pump 4 receives the sealing liquid from the tank 5 through the delivery pipe 14. The sealing liquid forms the necessary water ring in the pump 4. The tank 5 is refilled, if necessary, from the water supply system connected to the flange 12. The tank 5 also has the function of an intermediate collection tank for the substances passing through the pump 4, since the sealing liquid of the pump 4 does not need to be clean. The tank 5 may be emptied by gravity or by other means through a pipe 6 which may be connected to a sewer main or other suitable receiving device.

A feed pipe 21 for washing water is provided and is connected at its inlet end to a water supply system adjacent to the flange 12. The feed pipe 21 has a remotely controlled opening / closing valve 13. The feed pipe 21 is connected to the suction hose 34 at its downstream end and extends parallel to the suction duct 29 in the suction hose 34. A start / stop button 20 is provided for operating the suction device, alternatively said start / stop button 20 is a coin depositing device if the entire system is of a coin depositing type.

FIG. 2 shows the suction end of the suction hose 34.
A vacuum actuated valve member 32 is arranged to open and close the connection between the suction duct 29 of the suction hose 34 and the suction head 33 of the suction device. The valve member 32 has the form of a piston biased in the closing direction by a spring 31. Moving the valve member 32 in the opening direction is accomplished by opening the connection between the suction duct 29 and the opposite side of the valve member 32 through the hose 36.

The material from the tank to be emptied is sucked through the suction head 33 into the suction duct 29 and further into the power and control unit 35. The wash water is supplied to the wash water duct 28 through the pipe 37 inside the flexible suction hose 34 and further to the ring nozzle 38. The ring nozzle 38 forces cleaning water to flow along the outer surface of the suction head 33 to keep the suction head 33 from being contaminated with dirt.

When the heater 18 is used, warm air is blown through the duct 39 formed between the suction hose 34 and the suction duct 29 inside it by operating the air fan 17.

The invention is not limited to the embodiments shown, but several modifications can be made within the scope of the following claims.

[Brief description of drawings]

FIG. 1 is a schematic view showing a suction device according to the present invention.

2 is a schematic cross-sectional view of a portion of the suction device of FIG.

[Explanation of symbols]

 1 Enclosure 2 Electric Control Unit 3 Electric Motor 5 Tank 13 Open / Close Valve 17 Air Fan 18 Heater 20 Start / Stop Button 21 Feed Pipe 28 Wash Water Duct 29 Suction Duct 32 Valve Member 33 Suction Head 34 Suction Hose 35 Power / Control Unit 37 Tube 38 Ring nozzle 39 Duct

Claims (9)

[Claims] 1. A suction device for emptying a tank for storing toilet excrement and the like, and a tubular suction head (3) inserted into the tank for emptying the tank by suction force.
3), a suction mechanism (4) for generating a partial vacuum inside the suction head (33), and a suction mechanism (4) inside the suction head (33) for moving the tank contents to the receiving device. In the one having a suction duct (29) to be connected and a means for supplying the cleaning liquid to the suction head (33), the means for supplying the cleaning liquid is the suction head (3
A suction device, characterized in that 3) has a nozzle arrangement arranged to direct the washing liquid over a considerable length of the outer surface of the suction head (33) in order to clean it before it is removed from the tank. 2. A suction device according to claim 1, wherein the nozzle device is arranged so as to dispense a cleaning liquid along the entire outer area of the suction head (33).
8) Or the suction device characterized by having many nozzles. 3. A suction device according to claim 1 or 2, wherein the suction duct (29) is provided with a valve member (32) for promoting the suction process and for preventing backflow in the suction duct (29). A suction device characterized by being present. 4. A suction device according to claim 3, characterized in that the valve member (32) is arranged close to the suction head (33). 5. A suction device according to claim 3 or 4, characterized in that the opening movement of the valve member (32) is vacuum controlled by the vacuum supplied by the suction mechanism (4). 6. A suction device according to any one of claims 3 to 5, characterized in that the valve member (32) and the means for supplying the cleaning liquid are controlled manually. 7. A suction device according to claim 6, characterized in that the valve member 32 and the means for supplying the cleaning liquid can be controlled independently of each other. 8. The suction device according to any one of claims 1 to 7, wherein the tank contents pass through a suction mechanism (4), which is a liquid ring pump having a disintegrator installed on its suction side. A suction device characterized by being made to flow. 9. A suction device according to any one of claims 1 to 8, wherein a heater (18) is provided to prevent freezing of the suction device (35), and a suction duct (29). In addition, the washing water duct (37) is connected to the heater (1
8) is arranged inside a common protective hose (34) with a duct (39) for the warm air emanating from 8).