FI110536B - Process for transporting waste material in a vacuum sewer system - Google Patents

Abstract

The invention relates to a method for transporting waste material in a vacuum sewer system, which includes a source of waste (1), a sewer pipe (2, 21, 22), a first discharge valve (3) between the source of waste (1) and the sewer pipe (1, 21), a second discharge valve (4) in the sewer pipe (2), a waste receiving space and means (100) for generating vacuum into the sewer pipe. Waste is transported in the form of waste slugs, whereby during a first phase, the waste slug is conveyed from the waste source (1) through the first discharge valve (3) into the sewer pipe (2, 21, 22) by way of vacuum, and in a second phase, waste is conveyed further in the sewer pipe (2, 21,22), in the direction of the receiving space. For automatically adjusting the flush cycle according to the waste slug, in the first phase, the pressure flow after the waste slug, higher than said vacuum, is introduced from the location (9) after the first discharge valve (3) to the second discharge valve (4) for closing the same so that the flow through the first discharge valve is stopped, and in the second phase, a vacuum connection to the second discharge valve (4) is activated for opening the same.

Description

110536

METHOD FOR TRANSPORTING WASTE MATERIAL IN VACUUM UNDER VACUUM UNIT - FÖRFARANDE FÖR TRANSPORT AV AVFALLSÄMNE I ETT VAKUUMAVLOPPSSYSTEM

The invention relates to a method for transporting waste material in a vacuum sewer system according to the preamble of claim 1. The invention also relates to a vacuum sewer system.

Vacuum drainage systems of this type are previously known. However, the noise level associated with rinsing cycles of known systems is 10 high. In addition, ensuring that a source of waste material, such as a toilet unit toilet bowl, is emptied of any waste material requires that the flushing cycle be set so long that even larger amounts of waste can be expected to be discharged into the drain during the flushing period.

. It is an object of the present invention to provide a method for avoiding the above-mentioned drawbacks and allowing the transport of waste material * t · ·. in an efficient way by simple means. This object is achieved by a process according to the invention, the main features of which are apparent from the claim;

»I · 20 The basic idea of the invention is that the length of the flushing cycle is determined by. : depending on the size of the batch of waste that is automatically transported, with a constant amount of air per flush. When the second drain valve \ is closed after the first batch of waste has been transported, ···. through the drain valve, the flow, and thus the flow of air, through the first drain valve • · 1> »* will stop.

2 110536

The flow through the first drain valve is of an accelerating nature, whereby the flow rate increases from the beginning of the flow, i.e. from the beginning of the batch of waste material until the flow stops. The so-called post-waste batch. the trace air increases the flow rate proportionally even more with a lower flow resistance. The flow rate is directly proportional to the noise level.

The present invention optimizes, in particular, minimizes the amount of trace air passing through the first drain valve, thereby reducing flow rates, which substantially reduces the noise level. Further, the operation of the system flushing or emptying cycle is pneumatically controlled by the control member 10 using the vacuum present in the vacuum sewer system.

Preferably, the closing of the second drain valve is controlled by actuating a control member to activate a vacuum connection to the auxiliary valve so as to open a flow connection between the first drain valve, which is bypassed by the 15 waste batch, and the second drain valve. The flow of the batch through the first purge valve has stopped t «· ·.

• · · • I · • ·. Preferably, the control member also activates the engagement of the vacuum with the first drain valve 20 to open it, whereby closure occurs a predetermined time after the flow of the waste batch through the first drain valve has stopped.

In addition, the control member preferably activates the coupling of the vacuum to the flushing valve to open it, wherein: the flushing valve is closed after a predetermined time after the first drain valve is closed.

In addition to the system's drainage efficiency, an air valve is preferably coupled to the drain pipe, whereby the control member can advantageously activate a vacuum connection to said air valve to open it a predetermined time after opening the first drain valve to

Preferably, the predetermined times associated with the aforementioned valves are controlled by means of the control member and the throttling associated with said valves. The throttles are preferably nozzles, whereby the desired time effect can be achieved by changing their sizes. Alternatively, an adjustable valve arrangement may of course be used.

The invention also relates to a vacuum sewer system, the main features of which are disclosed in claim 11. Preferred embodiments of the vacuum sewer system are set forth in claims 12-18.

The present invention will now be described in more detail, by way of example only, with reference to the accompanying schematic drawing.

The drawing shows a part of a vacuum sewer system which »1 · ·. comprises a source of waste material, in this example a toilet device 1, a drain pipe 2, • · ·! comprising a first drainage valve 3 and a drainage pipe 2, i.e., a drainage pipe 2, i.e. a drainage pipe 2 ·; a second drain valve 4 between the first section 21 and the second section 22 of the drainage pipe The second section 22 of the drainage pipe leads to waste material I | :, '. J to a reception mode not shown in the drawing. The vacuum sewer system 'also comprises a device for generating a vacuum in the drain pipe 2, which device is: 25 shown by way of arrow 100 only.

A control system is connected to the toilet unit 1, which automatically adjusts the length of the wash period of the toilet unit 1 according to how much waste material from the toilet bowl 11 is conveyed to the drain pipe 2.

4, 110536

The control system comprises a control member 5 with a flow connection, by hoses, to a second portion 22 of the sewer pipe, which is under continuous vacuum maintained in a vacuum sewer system. The flow connection is provided at a position 6, 5 after the second drain valve 4, i.e. on the waste reception side of the second drain valve 4. Similarly, the control member 5 has a flow connection to the air valve 7 and auxiliary valve 8 associated with the first portion 21 of the drainage pipe. The control member 5 is also provided with a hose flow connection to the first drain valve 3 and a flushing device 10.

The first hose 51 between the control member 5 and the second portion 22 of the drainage pipe is connected to the second hose 52 between the auxiliary valve 8 and the second drain valve 4 by a first hose part 71 provided with a first throttle 31. The first hose 51 is provided with a first non-return valve 41 and a second non-return valve 42.

From the third hose 53 leading from the control member 5 to the auxiliary valve 8, the second branching hose part 72 leading to the valve 7 is provided with a second hose 72 ·! Throttle 32.

A third throttle 33 is provided on the flushing water valve 10 and a fourth throttle 34 is provided on the control member 5.

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Preferably, the aforementioned throttles 31, 32, 33 and 34 are nozzles, whereby changing the nozzle sizes can achieve the desired effect. Alternatively, an adjustable valve arrangement may be used.

• · · ii! 25 The following describes the operation of the * · • vacuum sewer system according to the example.

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* »» 5 110536

At rest, the first drain valve 3 of the toilet unit 1 is closed. The air valve 7 and auxiliary valve 8 connected to the first part 21 of the drainage pipe 2 are also closed. The auxiliary valve 8 is a diaphragm valve which, in the closed position, closes the connection between the second hose part 52 and the eighth hose part 58 5 and which, in the open position, opens the said connection. The second drain valve 4 is open because it is connected to the sewer pipe 2 (more particularly to the second part 22 of the sewer pipe 2, which is under vacuum maintained in the vacuum system) via a connection formed by the first hose 51, the first hose part 71 and the second hose 52.

When the toilet device 1 has been used and the waste material accumulated in the toilet bowl 11 is to be discharged into the sewer pipe 2, the rinsing cycle is activated by actuating the pneumatic actuator 12. This may preferably be a rinse knob having a bellows mechanism which actuates

The air pulse provided by the pneumatic actuation means 12 is arranged to actuate the control means 5 so that a negative pressure is connected from the drain pipe 2 through the first hose 51 to the first drainage valve 3 via the fifth hose 55 connected thereto, thereby opening the first drainage valve. Similarly, the vacuum is connected to the auxiliary valve 8 via the third hose 53, the flushing water valve 10 * 6 through the sixth hose 56 and the air valve 7 through the third hose 53 and the second hose part 72, whereby the three valves also open.

The air valve 7 is arranged to open with a predetermined delay by the action of the second throttle 32.

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After the first drain valve 3 has opened, the ambient air pressure in the toilet bowl 11 pushes the waste material in the toilet bowl and '·' · rinse water into the vacuum sewer pipe 2 through the drain valve 3.

··· 'In such a vacuum sewer system, the waste material is transported or moved forward 6 110536 from time to time. in the form of batches or plugs of waste material that fill the entire diameter of the drain pipe. This also means that after the batch of waste material there follows a pressure front higher than said vacuum.

At a predetermined position 9 of the sewer pipe 2, i.e. the first part 21 of the sewer pipe 21, preferably almost immediately after the first drain valve 3, a flow connection is provided with the auxiliary valve 8 by means of the eighth hose 58. This pressure front causes a sudden increase in pressure by a hose 58, by the aforementioned vacuum control, through an auxiliary valve 8 in its open position 10 and further by a second hose 52 into a second drain valve 4 and closes this. Thus, flow through the first drain valve 3 stops.

When the predetermined control period of the control member 5, i.e., in practice the action of the reduced pressure 1 5 extended by the fourth throttle 34, expires, the hoses 53, 72, 55 and 56 are coupled with ambient pressure affecting the first drain valve 3, auxiliary valve 8, air valve 7, 3 and auxiliary valve 8 close almost immediately. The air valve

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; 7 and the flushing water valve 10, on the other hand, remain open for some time due to the second choke 32 and the third choke 33 I · arranged in connection with them. By extending the opening time of the flush water valve 10, a desired water mirror is provided in the toilet bowl 11 for the next flushing cycle.

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The flushing water valve 10 is provided with a flow connection to the toilet vessel 11 of the toilet apparatus 1 by means of a seventh hose 57.

As the auxiliary valve 8 is closed, i.e. in its closed position, air * * · ;;; * is discharged (in the direction of the effective vacuum in the second section 22 of the sewer pipe) »» first throttle 31 (formed by the second hose 52 coupling), whereby the second drain valve 4 reopens due to the negative pressure 7 110536 applied thereto. However, the air valve 7 is still open (by the second throttle 32), whereby the conveying air facilitating the transport of the batch of waste material flows into the first section 21 of the sewer pipe, whereby the waste material is pushed into the second section 22 of the drain pipe. After the time defined by the second throttle 32, the air valve 7 closes, after which the flushing or emptying cycle has been completed and the part of said vacuum drainage system has returned to the above resting state for a new flushing or emptying cycle.

As stated above, the first, second, third and fourth throttles 31,32,33 and 34 are preferably nozzles, whereby the size of the nozzles can influence the control of the vacuum drainage system in a desired manner.

The fourth nozzle 34 of the control member 5 controls the opening time of the drain valve 3. This adjustment also affects the opening times of the flushing water valve 10, the auxiliary valve 8, and the air valve 7. A smaller nozzle extends the action time of the vacuum, i.e. the opening time of the valves in question.

«» # * I t · '· *: The time or amount of excess conveyance air is controlled by a second *> • nozzle 32, whereby a smaller nozzle increases the amount of conveyance air supplied by holding the air valve 7 open for an extended period of time.

t> »· *» * *

The first nozzle 31 in turn controls the operation of the second * * · drain valve 4 as follows. The smaller nozzle accelerates: the closing of the valve, thereby affecting how much air i »is transported with the batch of waste material through the toilet vessel 11 of the toilet device 1.

: 25 In known vacuum sewer systems with a rinsing cycle length of: I '; the constant amount of air flowing into the drain pipe 2 varies with the batch of waste material. by size. In the system of the present invention, this amount of air per flushing cycle is always constant. With this arrangement, • * ·

Claims (17)

A method of transporting waste material in a vacuum sewer system, comprising a waste material source (1,11), for example a toilet, shower or washbasin, a sewer pipe (2,21,22), a first discharge valve (3) between the waste material source (1). ) and the drain pipe (2), a second discharge valve (4) in the drain pipe (2), a receiving space for the waste material, and a device (100) for generating negative pressure in the waste pipe, in which process waste material is transported in the form of waste material portions. In the first stage, a waste batch is transported from. . The waste source (1) through the first discharge valve (3) to the drain pipe. (2,21,22) by the action of negative pressure, and "in a second stage, waste material is transported in the sewer pipe (2,21,22) in: ...: direction towards the reception space, characterized in that in the first stage a after the waste portion, the following higher pressure than said negative pressure is conducted from a predetermined point (9) after the first discharge valve (3) to the second discharge valve (4) to close the same, so that the flow through the first discharge valve ceases, and 5. the second stage is activated a coupling of negative pressure to the second discharge valve (4) to open the same to transport waste material further into the drain pipe (2,21,22) under the influence of the present negative pressure. Method according to claim 1, characterized in that by means of a control means (5.12), coupling of negative pressure to an auxiliary valve (8) is activated to open the same so that between the point (9) after the first discharge valve (3) and the second discharge valve ( 4) a flow coupling is formed. Method according to claim 2, characterized in that the auxiliary valve (8) is closed after a predetermined time after the flow of a waste material portion through the first discharge valve (3) has ceased. 1 5 Method according to Claim 1, characterized in that by means of the control means (5.12), coupling of negative pressure to the first discharge valve (3) is activated to open the same. ! Method according to claim 4, characterized in that the first discharge valve (3) is closed after a predetermined tilt after the flow of a waste portion through the first discharge valve has ceased. 6. A method according to claim 1, characterized in that, by means of a control means (5,12), coupling of negative pressure to a flushing water valve (10) is activated to: open the same to direct flushing water to the waste material source (1,11). Process according to claim 6, characterized in that the flushing water valve (10) is closed after a predetermined time after the first discharge valve (3) is closed. 14 110536 Method according to claim 1, characterized in that by means of a control means (5,12), coupling of negative pressure to an air valve (7) leading to the drain pipe (21) is activated to open it after a predetermined time after opening of the first discharge valve ( 3) for conveying transport air to the drain pipe (21). Method according to claim 6, characterized in that the air valve (7) is closed after a predetermined time after the opening of the second discharge valve (4). Method according to any of the preceding claims, characterized in that the predetermined times relating to the opening and closing of the first discharge valve (3), the air valve (7) and the flush water valve (10) are controlled by throttling (31,32,33,34). . A vacuum drainage system comprising a waste source (1,11), for example, a toilet, shower or washbasin, a first discharge valve (3) between the waste source (1) and the waste pipe (2), a second discharge valve (4) in the drainage pipe (2) , a waste space receiving space, and a device (100) for generating negative pressure in the sewer pipe, characterized in that in a first part (21) of the sewer pipe (2). at a predetermined point (9) after the first discharge valve (3), a flow connection (58,8,52) is provided to the second discharge valve in 20 (4). * »· Vacuum drainage system according to claim 10, characterized in that * In said flow connection, an eighth hose (58) comprises between the ·, · said point (9) and an auxiliary valve (8) and a second hose (52) between the auxiliary valve (8) and the second discharge valve (4), and that the auxiliary valve, (8), by means of a third hose (53), starts in flow connection with a> ♦; control means (5,12) staring through a first hose (51). flow connection with one after the second discharge valve (4) located • * ·, ···. second part (22) of the drain pipe. > · <«· 15 110536 Vacuum drainage system according to claim 12, characterized in that the first discharge valve (3) starts in flow connection with the control device (5,12) through a fifth hose (55). Vacuum drainage system according to claim 12 or 13, characterized in that the vacuum drainage system comprises a flushing water valve (10) which, through a sixth hose (56), is in flow connection with the control means (5,12) and that the flushing water valve (10) is in flow connection with waste source ( 1.11) through a seventh tube (57). Vacuum drainage system according to any of claims 12-14, characterized in that the vacuum drainage system comprises an air valve (7) which, through a third hose (53) and a second hose portion (72), starts in flow connection with the control means (5,12), and that an air valve starts in flow connection with the first part (21) of the drain pipe (2). Vacuum drainage system according to any one of claims 12-15, 1. characterized in that the first hose (51) and the second hose (52) are connected to each other by means of a first hose portion (71) provided with: a first throttle (31), that a fourth strut (34) is connected to. the control means (5), a second throttle (32) is connected to the air valve (7), and a third throttle (33) is connected to the flush water valve (10). . 20 Vacuum drainage system according to claim 16, characterized in that said throttles are nozzles or adjustable valves. 1 * * Vacuum drainage system according to any of claims 12-17, characterized in that a pneumatic actuator (12) is connected to the control means (5) through a fourth hose (54).