JPH05263459A - Suction pressure vessel - Google Patents

Abstract

PURPOSE: To use recovered water for incidental tasks or fresh water for high- pressure washing and for operating a pump for generating a positive or a negative pressure required in a pressure vessel for suction. CONSTITUTION: A suction pressure vessel 2 is helpful for claming, washing, unloading, and monitoring a sewer, a traffic section, or the like. A connection port or a connection pipe 22 with a filter 23 being located at nearly the half height is provided between the vessel 2 and a fresh water tank 11. A pump 15 that is formed as a water-sealing pump is provided in the fresh water tank 11. A riser 26 for retaining the level of fresh water can be connected to the suction pipe of a high-pressure pipe 12. The connection port or the connection pipe 22 with the filter 23 is connected to the riser 26 via a pipe 25. Each of isolation valves 24 and 27 is provided within the inner opening range of the pipe 25 and the riser 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises at least one connecting short pipe for connecting a discharge pipe or a suction pipe and at least one pump, and generates a positive pressure or a negative pressure inside a suction pressure vessel. For this purpose, a connection pipe is provided between the pump and the container, the suction pressure vessel additionally comprising at least one chamber, which serves as a fresh water tank, separated from the vessel chamber, the fresh water tank being provided with a high-pressure pump. The present invention relates to a suction pressure vessel connected to the suction pipe for cleaning, cleaning, discharging and monitoring sewers, traffic areas and the like.

[0002]

2. Description of the Prior Art Such suction pressure vessels (also called sludge suction vehicles or vacuum cars), which are usually for local governments, are used both in factories and in general business. The suction pressure vessel is mounted on a runnable chassis on which a fresh water tank is also carried. With such a device, dirt and sludge are sucked out from a water channel, a sewer pipe or a container. In this case, a lower pressure than the outside atmosphere is generated inside the container by the pump. The water channel, sewer or container which has been purified in this way is then additionally jet-washed by high-pressure water jets. The water required for this is supplied from the fresh water tank already mentioned. The pressure required for this is generated by an inherent high pressure pump. Exhausted dirt and sludge contain, in experience, very much water. Furthermore, experience has shown that solid parts and water are separated in the container in a relatively short time by precipitation, and solid parts are precipitated in the container bottom in a relatively short time.

In the case of the known suction pressure vessel (EP-A 75603), the closing wall of the filtered water chamber which faces the mud chamber is part of a piston which slides in the container. .. The back of this closure wall defines the reservoir for the container. The stored water chamber is connected to the filtered water chamber. When the piston slides, the filtered water chamber changes its position in the container without changing its volume, and the volume of the mud chamber and the stored water chamber increases or decreases depending on the moving direction of the piston.
This costly construction especially facilitates cleaning of the container. Within the container, there are three areas or chambers. This chamber contains water with different degrees of contamination. The device for producing the pressure necessary for its operation inside the container is provided outside the container. This suction pressure vessel has a very complicated structure and is not suitable in practice.

Another suction pressure vessel, which is likewise designed as a sludge suction vehicle, is disclosed in European Patent Application Publication No. 1
No. 30597. This sludge suction vehicle includes a container, and a water injection pump used as a sludge pump is connected to the container.
The feed water component is separated through the filter. This feed water component is guided through a fine filter and supplied to a low pressure pump. The low pressure pump itself supplies the driving water for the water injection pump. On the suction side of the water injection pump,
A separator for solid components is attached.

Further, European Patent Application Publication No. 4842
No. 8 discloses a sludge suction vehicle of the type concerned. This vehicle is equipped with a sludge container and a miscellaneous water tank or fresh water tank. The miscellaneous water tank or fresh water tank supplies water to the hose via a high-pressure pump. The hose is equipped with a nozzle and can be lowered into the waterway to be cleaned. Also in this case, the water generated in the sludge container is returned to the miscellaneous water tank or the fresh water tank through the filter. However, since the operational states of the miscellaneous water tank or the fresh water tank and the sludge container are different, the suction work and the cleaning work cannot be performed at the same time. However, in order to be able to suck and wash at the same time, two water tanks or fresh water tanks are provided in this known construction. The two miscellaneous water tanks or the fresh water tanks are connected to the upper inlet pipe and the lower outlet pipe, which are connected in parallel, respectively, through an inlet cutoff valve and an outlet cutoff valve provided in the outlet of the sludge chamber filter device or It can be selectively connected to the inlet of the high pressure pump.

European Patent Application Publication No. 48427 discloses a special construction of a coarse filter in a suction pressure vessel. The coarse filter consists of a chain screen, the close chain strands of which are not connected to each other. As the chain links are free to move, the sludge passing through loses most of its kinetic energy and the large sludge descends by gravity.

Further, European Patent Application Publication No. 4751
A suction pressure vessel or a sludge suction vehicle is known from No. 9. In this case, a filtration device in the form of a floating collection container is provided for collecting water in the undivided container.

[0008]

The present invention starts from these state of the art, and recovers miscellaneous water or fresh water,
It is intended to be used for high-pressure cleaning and for operating a pump that produces the required positive or negative pressure in the suction pressure vessel. For this purpose, pumps that operate as efficiently as possible should be used. This pump consumes less water, so that all the miscellaneous water or fresh water recovered by it is used for high-pressure washing.

[0009]

According to the invention, the object is according to the invention to provide a filter-equipped connection port or pipe at approximately half height between the container and the fresh water tank. A pump formed as a pump is provided in the fresh water tank, a riser pipe, which serves to hold the level of fresh water, can be connected to the suction pipe of the high-pressure pump, and a connection port or connection pipe with a filter connects the pipe. The solution is achieved by providing a shut-off valve which is connected to the riser via the pipe and which is provided in the inside opening area of the riser and the riser respectively.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to specifically describe the present invention, embodiments will be described in detail with reference to the drawings. The present invention is not limited to this.

FIG. 1 diagrammatically shows, in a partial longitudinal section, a suction pressure vessel formed as a municipal vehicle. A sideways cylindrical body as a suction pressure vessel 2 is supported on a chassis 1 of a lorry. This container is divided by a partition 3 into two chambers 4, 5.
The partition wall 3 may be fixedly supported in the suction pressure container, may be slidably supported, or may be swingably supported. A suction hose 7 is connected in a known manner via a short pipe 6 provided in the rear chamber 4.
In this case, the shutoff valve 8 is provided in the connection range.

Behind the cab 9 of the vehicle, a miscellaneous water tank or fresh water tank 11 is provided, connected to the end wall 10 of the suction pressure vessel 2, and between the cab 9 and the fresh water tank 11. A high-pressure pump 12 is additionally supported in the space. The pressure side of this high pressure tank can be connected to the high pressure hose 14 wound on the reel 13 by a method not shown. The free end, not shown, of this high-pressure hose has an injection nozzle.

A water ring pump 15 is provided in the fresh water tank 11.
Is stored. This pump comprises an air suction pipe 16 and an air discharge pipe 17, and a switching device 18. This switching device serves, as is known, to generate a positive or negative pressure in the chamber 4. Chamber 4 and water ring pump 1
The discharge pipe provided between the discharge pipes 5 and 5 is not shown here for the sake of clarity. The water ring pump consists of a round casing. The casing is provided with a rotor having radial straight blades or curved blades. The rotor shaft is supported eccentrically with respect to the surrounding casing. The casing is partially filled with water by a tube. During the rotation of the rotor, the blades are slightly immersed in this water ring because they are formed in the water ring casing and the shaft is eccentrically arranged. In this case, the blades of the rotor partition and shape the individual cells in the water ring. This cell periodically grows and shrinks.

A suction port and a discharge port are attached to the side casing lid as follows. That is, they are attached so that the suction port is located in the cell range where the size becomes large and the discharge port is located in the cell range where the size becomes small.
The air to be conveyed is sucked by the expansion of the cell, compressed when the cell is contracted, and conveyed from the water ring pump to the discharge pipe through the discharge port. Such a pump is also called a liquid ring pump.

A connecting pipe 19 for connecting both chambers 4 and 5 is provided on the partition wall 3 at a position of approximately half height.
In this case, on the chamber 4 side, a coarse filter 20 is provided in front of this connecting pipe 19. On the side of the second chamber 5, a blocking device 21 is provided in the opening range of the connecting pipe 19. The problem with this shutoff device is to prevent backflow from chamber 5 to chamber 4. Chamber 5
Acts as a sedation chamber or a precipitation chamber.

The fresh water tank 11 and the chamber 5 are connected to the connecting pipe 2
2 are connected to each other. Here, too, the connecting pipe 22 is attached at a height position of about half of the tank. A fine filter 23 is provided near the opening of this connecting pipe 22 to the chamber 5. Connection pipe 22 is valve 2
Riser pipe 2 of fresh water tank 11 via 4 and pipe 25
Connected to 6. The opening inside the riser is valve 2
It can be closed by 7 and the other side reaches the high-pressure pump 12 as a suction line. The task of the riser pipe 26 of the fresh water tank 11 is to keep the minimum level necessary for the operation of the water ring pump 15. In a region above the chambers 4 and 5 of the container 2, so-called stop valves 28 and 29 are provided, as is known. This valve acts as a level switch and has the task of switching off the working equipment and shutting it down when the filling level reaches the maximum level in the chamber.

At the time of use, the fresh water tank 11 contains at least the minimum amount of water. In this case, the liquid level is predetermined by the height of the riser tube 26. When cleaning the container or the sewer, the suction hose 7 is fed, the water seal pump 15 is started, and a negative pressure is generated in the chamber 4. As a result, when the shutoff valve 8 is opened, sewage and sludge are sucked into the chamber 4 from the suction hose. This suction is performed until the amount of dirty water in the chamber increases and the deactivation valve 29 operates to stop or switch the water seal pump. Chamber 4
Since the solid components in the wastewater therein settle relatively quickly, large dirt and sludge are separated from water. as a result,
The separated water flows from the chamber 4 into the chamber 5 through the filter 20 and the connecting pipe 19. This process includes shutoff valve 8
The chamber 4 via the water ring pump 15 that has been closed.
It is accelerated by generating a positive pressure on. The chamber 5 is filled with roughly purified sewage. This pre-purified water in the chamber 5 is directed or pushed into the fresh water tank 11 when the valves 24, 27 are opened. However, when the valve 24 is opened and the valve 27 is closed, it is directly sucked by the high-pressure pump 12 and subsequently washed and injected by the high-pressure hose 14. The sludge or sludge components are further separated from the water by sedimentation in the settling or sedimentation chamber 5.

This makes it possible to effectively use a large amount of water component of the sucked-out sludge or sludge.
In this case, the fresh water tank 11 and the water ring pump 15 are integrated to form one unit. In the case of the illustrated embodiment, the suction pressure vessel is divided into two chambers 4, 5 by the partition wall 3 described above. Basically, it is possible to use a suction pressure vessel with one chamber which is not divided. Thereby, the sucked sewage in which the sludge part or the solid part has settled is guided to a fresh water tank or a high-pressure tank 12 via a multistage filter as the case may be. In the case of such a multi-stage type filter, sufficient purification is achieved.

In order to remove dirt from the filter and to maintain its water permeability, it is expedient if the filter is provided with a mechanical cleaning device, for example in the form of a scraping strip or scraping lip. Is. The scraping strips or lips are guided and pulled across the surface of the filter by a suitable mechanism, thereby scraping off any dirt that may be deposited.

With the proposal of the invention, the normally large amount of water in the sucked-out sludge can be used for two purposes. That is, it can be used on the one hand to operate a suction pressure vessel (water ring pump) and on the other hand for high-pressure washing, so that it is not necessary to bring the water closer to the quality of drinking water, and the recovered chores Most of the water or fresh water components can be used for high pressure cleaning.

[0021]

INDUSTRIAL APPLICABILITY As described above, the suction pressure vessel of the present invention generates the positive pressure or the negative pressure required for high-pressure cleaning of the recovered miscellaneous water or fresh water and in the suction pressure vessel. It has the advantage that it can be used to operate a pump.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional view of a suction pressure vessel.

[Explanation of symbols]

 1 Lorry chassis 2 Suction pressure vessel 3 Bulkhead 4,5 Chamber 6 Short pipe 7 Suction hose 8 Shutoff valve 9 Driver's cab 10 End wall 11 Fresh water tank 12 High pressure pump 13 Reel 14 Hose 15 Water seal pump 16 Suction pipe 17 Discharge Pipe 18 Switching device 19 Connection pipe 20 Coarse filter 21 Blocking device 22 Connection pipe 23 Fine filter 24 Valve 25 Pipe 26 Rise pipe 27 Valve 28, 29 Operation stop valve

Claims (5)

[Claims] 1. At least one connecting short pipe for connecting a discharge pipe or a suction pipe and at least one pump (15) are provided, and a positive pressure or a negative pressure is generated inside the suction pressure container (2). For this purpose, a connection pipe is provided between the pump (15) and the container (2), and the suction pressure container (2) is separated from the container chamber.
This fresh water tank (11) additionally comprises at least one chamber serving as 1)
Filter (23) at approximately half height in the suction pressure vessel for purification, cleaning, discharge and monitoring of sewers, traffic areas, etc. connected to the suction pipe of
A connecting port or connecting pipe (22) with a valve is provided between the container (2) and the fresh water tank (11), and a pump (15) configured as a water ring pump is a fresh water tank (11).
A riser pipe (26), which is provided inside and serves to maintain the level of fresh water, is connectable to the suction pipe of the high-pressure pump (12) and a connection port or connection pipe (22) with a filter (23) is provided. It is connected to the riser pipe (26) via a pipe (25), and one shut-off valve (2) is provided in each of the inside opening areas of the pipe (25) and the riser pipe (26).
4, 27) are provided. 2. A shut-off valve (24, 27) is selectively operable, and a suction pipe of a high-pressure pump (12) is connected via this shut-off valve (24, 27) to a fresh water tank (11) or vessel (11). 2. The suction pressure vessel according to claim 1, which is connectable to 2). 3. The container (2) is divided into two chambers (4,5) by a partition (3), the connecting port or connecting pipe (19) having a filter (20) being approximately half of the partition (3). The filter (20) provided at the height position and provided on the partition (3) of the container (2) is formed as a coarse filter, and the filter (23) provided between the container and the fresh water tank (11) is a fine filter. 3. The suction pressure vessel according to claim 1, wherein the suction pressure vessel is formed as follows. 4. A shut-off device (2) behind the coarse filter (20) in an opening or tube (19) in the partition (3) connecting both chambers (4,5) of the container (2).
Suction pressure vessel according to claim 3, characterized in that 1) is provided. 5. Suction pressure vessel according to claim 1, characterized in that the connecting short pipe for connecting the suction hose (7) is provided with a shut-off valve.