JP2823095B2 - Suction pressure vessel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has 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 connecting line is provided between the pump and the container, the suction pressure container additionally provided with at least one chamber which is separate from the container chamber and serves as a fresh water tank, the fresh water tank being a high-pressure pump The present invention relates to a suction pressure vessel connected to a suction pipe for purifying, washing, discharging and monitoring sewers, traffic areas and the like.

[0002]

BACKGROUND OF THE INVENTION Such suction pressure vessels (also called sludge suction vehicles or vacuum cars) are usually for local governments, but are used both in factories and in general business. The suction pressure vessel is provided on a movable chassis on which the fresh water tank is carried. With such a device, dirt and sludge are sucked out of a waterway, a drain, or a container. In this case, a pressure lower than the outside atmosphere is generated inside the container by the pump. The waterways, drains or vessels thus purified are subsequently additionally flushed by means of a high-pressure water spray. The water required for this is supplied from the fresh water tank already mentioned. The pressure required for this is generated by a special high-pressure pump. The drained sewage and sludge contain very much water in experience. Furthermore, experience has shown that the solid part and the water are separated by settling in the container in a relatively short time, and the solid part precipitates in the bottom of the container in a relatively short time.

[0003] In the case of the known suction pressure vessel (EP-A-75603), the closing wall of the filtrate chamber facing the mud chamber is part of a piston sliding in the vessel. . The back of this closed wall defines a reservoir for the reservoir. The storage water chamber is connected to the filtration water chamber. As the piston slides, the filtered water chamber changes its position in the container without changing its volume, and depending on the direction of movement of the piston, the volumes of the mud chamber and the storage water chamber increase or decrease.
This costly structure particularly facilitates cleaning of the container. Within the container, three regions or chambers are provided. This chamber contains water of different degrees of contamination. The device for generating the pressure required for its operation in the vessel is provided outside the vessel. This suction pressure vessel is very complicated in construction and is not suitable in practice.

Another suction pressure vessel, also formed as a sludge suction vehicle, is disclosed in European Patent Application Publication No.
No. 30597 is known. The sludge suction vehicle includes a container, and a water injection pump used as a sludge pump is connected to the container.
Feed water components are separated via a 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 provided.

[0005] Further, European Patent Application Publication No. 4842
No. 8 discloses a sludge suction vehicle of the type of interest. The vehicle is equipped with a sludge bin and a miscellaneous or fresh water tank. The chore water tank or fresh water tank supplies water to the hose via a high pressure pump. The hose is provided with a nozzle and can be lowered into the channel to be purified. Also in this case, the water generated in the sludge container is returned to the household water tank or fresh water tank through the filter. However, since the operating states of the miscellaneous water tank or the fresh water tank and the sludge container are different, the suction operation and the cleaning operation cannot be performed at the same time. However, in order to be able to simultaneously draw and wash, in this known construction two miscellaneous or fresh water tanks are provided. The two-way water tank or the fresh water tank is connected to the upper or lower inlet pipe and the lower or lower outlet pipe connected in parallel through an inlet shut-off valve and an outlet shut-off valve, respectively. It can be selectively connected to the inlet of a high pressure pump.

[0006] EP-A-48427 discloses the special construction of a coarse filter in a suction pressure vessel. This coarse filter consists of a chain screen, the close chain strands of which are not connected to each other. As the chain link is free to move, the passing sludge loses most of its kinetic energy and the large sludge descends by gravity.

Further, European Patent Application Publication No. 4751 is disclosed.
No. 9 discloses a suction pressure vessel or a sludge suction vehicle. In this case, a filtering device in the form of a floating collecting container is provided in the undivided container to collect the water.

[0008]

SUMMARY OF THE INVENTION The present invention starts from these state of the art, and
It is intended to be used for high-pressure washing and for operating a pump which generates 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 chopped or fresh water recovered is used for high pressure washing.

[0009]

This object is achieved according to the invention in that a connection or a connection pipe with a filter, located approximately at half height, is provided between the container and the fresh water tank, A pump formed as a pump is provided in the fresh water tank, a riser serving to maintain the level of fresh water can be connected to the suction pipe of the high-pressure pump, and a connection or connection pipe with a filter connects the pipe. The problem is solved by providing a shut-off valve connected to the riser via an internal opening area of the pipe and the riser.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to explain the present invention concretely, an embodiment will be described in detail with reference to the drawings. Note that the present invention is not limited by this.

FIG. 1 schematically shows, in partial longitudinal section, a suction pressure vessel formed as a municipal vehicle. A horizontal cylinder as a suction pressure vessel 2 is supported on a chassis 1 of the truck. This container is divided by a partition 3 into two chambers 4,5.
The partition 3 may be fixedly supported in the suction pressure vessel, 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, a shutoff valve 8 is provided in the connection range.

Behind the cab 9 of the vehicle, there is provided a miscellaneous water tank or fresh water tank 11 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 the high-pressure tank can be connected to a high-pressure hose 14 wound around a reel 13 by a method not shown. The free end (not shown) of the high-pressure hose has a spray nozzle.

In the fresh water tank 11, a water ring pump 15 is provided.
Is stored. The pump includes an air suction pipe 16 and an air discharge pipe 17, and a switching device 18. This switching device serves to generate a positive or negative pressure in the chamber 4 as is known. Chamber 4 and water ring pump 1
5 is not shown here for easy viewing. The water ring pump has a round casing. The casing is provided with a rotor having radially straight or bent blades. The rotor shaft is mounted eccentrically with respect to the surrounding casing. The casing is partially filled with water by a tube. During rotation of the rotor, the blades are slightly immersed in the water ring (water seal) casing, since the shaft is formed eccentrically. In this case, the individual cells are partitioned and formed in the water ring by the blades of the rotor. This cell periodically grows and shrinks.

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

The partition wall 3 is provided with a connection pipe 19 connecting the two chambers 4 and 5 at almost half height.
In this case, a coarse filter 20 is provided in front of the connection pipe 19 on the side of the chamber 4. On the side of the second chamber 5, a shutoff device 21 is provided in the opening area of the connection pipe 19. The problem with this shut-off device is to prevent backflow from chamber 5 to chamber 4. Chamber 5
Serves as a sedation or settling chamber.

The fresh water tank 11 and the chamber 5 are connected to the connecting pipe 2.
2 are connected to each other. Again, this connection pipe 22 is mounted at about half the height of the tank. A fine filter 23 is provided near the opening of this connection pipe 22 to the chamber 5. Connection pipe 22 is valve 2
4 and the rising pipe 2 of the fresh water tank 11 through the pipe 25
6 is connected. The opening inside the riser is valve 2
The other side reaches the high-pressure pump 12 as a suction pipe. The challenge for riser 26 of fresh water tank 11 is to maintain the minimum level required for operation of water ring pump 15. In a range above the chambers 4 and 5 of the container 2, so-called operation stop valves 28 and 29 are provided as is well known. This valve acts as a level switch and has the task of switching off the work equipment and stopping operation when the filling level reaches the highest level in the chamber.

At the time of use, the fresh water tank 11 contains at least a minimum amount of water. In this case, the liquid level is predetermined by the height of the riser 26. When cleaning the container or the sewer, the suction hose 7 is drawn out, the water ring pump 15 is started, and a negative pressure is generated in the chamber 4. Thereby, 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 sewage in the chamber increases and the stop valve 29 operates to stop or switch the water ring pump. Chamber 4
The solid components in the sewage in the sewage settle relatively quickly, so that water is separated from large sewage and sludge. as a result,
The separated water flows from the chamber 4 to the chamber 5 via the filter 20 and the connection pipe 19. This process is performed by shut-off valve 8
Is closed and the chamber 4 is switched via the switched water ring pump 15.
Is accelerated by generating a positive pressure at The chamber 5 is filled with roughly purified sewage. This pre-purified water in the chamber 5 is led or pushed into the fresh water tank 11 when the valves 24, 27 are opened. However, when valve 24 is open and valve 27 is closed, it is directly drawn by high pressure pump 12 and subsequently flushed by high pressure hose 14. Sludge and sludge components are further separated from the water by sedimentation in the calming or sedimentation chamber 5.

Thus, a large amount of the water component of the sludge or sludge sucked can be used effectively.
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 3. Basically, a suction pressure vessel having one undivided chamber can be used. As a result, the sucked-in sewage, in which the sludge portion or the solid portion has settled, is led to a fresh water tank, possibly via a multistage filter, or directly to the high-pressure tank 12. In the case of such a multi-stage 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. It is. The scraping strip or lip is guided and pulled over the surface of the filter by a suitable mechanism, thereby scraping off the adhering dirt.

According to the proposal of the present invention, the normally large amount of water of the sucked sludge can be used for two purposes. 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 the water does not have to be close to the quality of the drinking water and the collected Most of the water component or fresh water component can be used for high pressure washing.

[0021]

As described above, the suction pressure vessel of the present invention generates the required positive pressure or negative pressure for the high-pressure washing of the collected water or fresh water and in the suction pressure vessel. There is the advantage that it can be used to run a pump.

[Brief description of the drawings]

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lorry chassis 2 Suction pressure vessel 3 Partition wall 4,5 chamber 6 Short pipe 7 Suction hose 8 Shut off valve 9 Driving 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 Shutoff device 22 Connection pipe 23 Fine filter 24 Valve 25 Pipe 26 Rise pipe 27 Valve 28, 29 Operation stop valve

Claims (5)

(57) [Claims] At least one connecting short pipe for connecting a discharge pipe or a suction pipe and at least one pump (15) for generating a positive pressure or a negative pressure inside a suction pressure vessel (2). For this purpose, a connecting pipe is provided between the pump (15) and the container (2), and the suction pressure container (2) is separated from the container chamber by a fresh water tank (1).
It additionally comprises at least one chamber serving as 1), this fresh water tank (11) comprising a high-pressure pump (12)
Filter (23) at approximately half-height in a suction pressure vessel connected to the suction pipe for purifying, cleaning, draining and monitoring sewers, traffic areas, etc.
A connection port or a connection pipe (22) provided with a container is provided between the container (2) and the fresh water tank (11), and a pump (15) formed as a water ring pump is provided in the fresh water tank (11).
A riser pipe (26) provided inside and serving to maintain the level of fresh water is connectable to the suction pipe of the high-pressure pump (12) and a connection or connection pipe (22) with a filter (23) is provided. It is connected to a riser pipe (26) via a pipe (25), and one shut-off valve (2) is provided in each of the open areas of the pipe (25) and the riser pipe (26).
4, 27) is provided, The suction pressure container characterized by the above-mentioned. 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 a container (11). 2. The suction pressure vessel according to claim 1, wherein the suction pressure vessel is connectable to 2). 3. The container (2) is divided into two chambers (4, 5) by a partition (3), and a connection port or a connection pipe (19) having a filter (20) is substantially 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 a pressure vessel. 4. An opening or pipe (19) provided in the partition (3) connecting the two chambers (4, 5) of the container (2), behind the coarse filter (20) in a shut-off device (2).
4. The suction pressure vessel according to claim 3, wherein 1) is provided. 5. The suction pressure vessel according to claim 1, wherein the connection short pipe for connecting the suction hose is provided with a shut-off valve.