DE102008009721A1 - Valve device for controlling multiple brackets in underground tunnel, has distributor module comprising longitudinal holes and multiple transverse holes, and reflowing pipeline connected to two connecting pipes - Google Patents

Abstract

The device has a distributor module (10) comprising longitudinal holes (12, 14) i.e. through hole, and multiple transverse holes (16, 18, 20). The longitudinal holes and transverse holes are connected to a high pressure pipeline and a reflowing pipeline. Connecting pipes (P1, P2) are arranged at two ends of the longitudinal hole (14) and directly connected with a high pressure supply device. Connecting pipes (R1, R2) are arranged at two ends of the longitudinal hole (12). The reflowing pipeline is connected to the connecting pipes (P1, P2, R1, R2). An independent claim is also included for a method for controlling a valve device.

Description

The present invention relates to a valve assembly according to the preamble of claim 1. Such a valve assembly is known from DE 103 48 582 A1 known.

In Distributor blocks for expansion point in underground construction are directional valves for different functions to move summarized by hydraulic cylinders. The required flow differs strongly between the individual functions. For a small extension, the nominal sizes of the main control valves are between 4 and 20 mm needed. Very large expansion station with punch diameters greater than 400 mm need however, main control valves are much larger than 20 mm. Main control valves or valve cartridges with a Nominal size greater than 20 are not common and would be a huge one Need distribution block. For a bigger one Block is however the material and its procurement a problem since usually steel or stainless steel is required.

Common are manifolds with one inlet (P) and one return port (R).

in principle In underground mining valve blocks are also known in which the pressure line is inserted on one side and on the other side is running again to connect to produce another distribution block. Such an arrangement however, it is not suitable for high flow rates.

It The object of the present invention is a valve arrangement of the type mentioned in such a way that with the existing Hydraulic power units and hydraulic elements Expansion station with large Stamping diameters are actuated in a short time.

The This object is achieved by the features of the claim 1 and in particular in that a first longitudinal bore the distributor block is a through hole, d. H. at her one End and at the other end exit from the manifold, wherein at the two ends a connection is provided. Both connections are directly connected to a high pressure supply. Furthermore is the second longitudinal bore also has a through hole, at the two ends of a connection is provided, wherein at both Connections connected to a return line is.

With the valve assembly according to the invention can easily used several main control valves in parallel be still with the manifold block kept small in cross-section can be. Because the high pressure supply as well as the return line not just from one side but from two sides to the distribution block is connected and the pressure line not through the manifold block is ground through, can be very high flow rates be achieved.

advantageous Embodiments of the invention are described in the description, the drawing and the dependent claims.

To a first advantageous embodiment, the cross section the longitudinal bores are not larger than the nominal size Be DN25. This is advantageous in that hydraulic hoses be available with such a nominal size underground and also have standard connectors.

Farther It may be advantageous to the cross section of the connections equal to the cross section of the longitudinal bores to make Here to achieve a uniformly high flow.

Farther It may be advantageous to have main control valves of a nominal size of DN20, since such valves are proven in practice and thus no new designs are required.

Around nevertheless to achieve high flows, it is advantageous if each main control valve with its own, electrically separate controllable pilot valve is provided, since this two or more Main control valves can be connected in parallel to to achieve the required flow rates.

To In another advantageous embodiment, anyone can Output via its own pressure hose with the expansion rack keep in touch. It would be basically possible, two exits to a pressure hose larger cross-section summarize. Therefor however, additional components would be needed which are not always available by default stand.

Farther the aforementioned embodiment offers the advantage that a first and a second output via one in the flow direction arranged pilot-operated check valve with a piston surface connection of a cylinder of the expansion rack can be connected. This allows the two associated Main control valves are used to offset the flow time to turn, thereby an undesirable strong pressure pulse within the system. An advantageous distance between the two switching operations is of the order of about 10 to 100 ms.

Hereinafter, the present invention purely by way of example with reference to an advantageous embodiment and with reference to the accompanying drawings. Show it:

1 a manifold block;

2 a representation of the prevailing within the manifold block flows in parallel switching of two main control valves when switching fluid from the high pressure supply;

3 one of the 2 corresponding representation to illustrate the return flow through the manifold block; and

4 a hydraulic scheme for the distribution block of 1 ,

The in 1 shown distribution block 10 is made in one piece from steel and has two parallel longitudinal bores 12 and 14 on, both of which are in the 1 extend left side of the manifold block to the opposite right side. Here, the term longitudinal bores used does not necessarily mean that the manifold block 10 must be formed parallelepiped, as well as a square shape can be applied in the same way.

At the front of the manifold block 10 are seen on the left two superimposed ports P2 and R2 with nominal diameter DN25, the port P2 is connected directly to a (not shown) high pressure supply and the port R2 is connected to a (also not shown) return line. The port P2 opens into a hole, which in turn into the longitudinal bore 14 opens, whereas the port R2 opens into a bore with the longitudinal bore 12 communicates.

On the opposite right side of the manifold block 10 are provided in the same way two superimposed ports P1 and R1 with nominal diameter DN25, of which the port P with the longitudinal bore 14 and the port R with the longitudinal bore 12 connected is.

As 1 further shows are on the front of the manifold block 10 arranged various transverse bores, of which the total of eight transverse bores 16 have a nominal size of DN20, the four central transverse bores 18 have a nominal size of DN12 and the left six cross holes 20 have a nominal size of DN10.

It is understood that the outside of the manifold block 10 open ends in 1 at the reference numerals 12 and 14 are recognizable, are closed by a stopper. In other words, the ports P1, P2 and R1, R2 need not open coaxially into the longitudinal bores, but may also extend transversely or obliquely to them. All that is required is that fluid from the high-pressure lines from two sides into the longitudinal bore 14 flows and that fluid to two sides from the longitudinal bore 12 flows into the return.

4 clarifies the hydraulic scheme to the in 1 shown distribution block 10 , As can be seen, the longitudinal bore extends 14 between ports P1 and P2 and the longitudinal bore 12 connects the ports R1 and R2 with each other. Furthermore, each main control valve is a separate, electrically separately controllable pilot valve 24 assigned, which is individually electrically controlled via the switching terminals E1-E18.

To set the expansion frame in the illustrated embodiment a total of four main control valves 22 (Valves F1 to F4), which requires a minimum DN32 cross section for hydraulic supply. However, this supply is ensured with the two ports P1 and P2 with DN25, since the pressure supply to the main control valves F1 to F4 from two sides of the manifold block 10 he follows.

2 shows schematically the flow through the manifold block 10 , where only the connections, the longitudinal bores and the main control valves are shown. Since the two ports P1 and P2 are directly connected to a high-pressure supply, pressurized hydraulic fluid flows through these ports into the longitudinal bore 14 and from there to the main control valves F5 to F8 from both sides. At the in 3 shown return flow of hydraulic fluid flows through the valves F5 to F8 and from there to two sides through the longitudinal bore 12 to the terminals R1 and R2.

To set the expansion, the four main control valves F1 to F4 can be actuated by means of the associated pilot valves via the electrical control terminals E1 to E4 offset in a small time interval to avoid strong pressure surges within the system. For this purpose, the outputs of the main control valves F1 to F4 are each connected via a separate pressure hose to the expansion frame, wherein the hydraulic fluid is in the region of the expansion frame via a respective arranged in the flow direction releasable check valve with the piston surface connection of a cylinder of the expansion rack in combination. In this way, it is prevented that, for example, hydraulic fluid that has been released by the main control valve F1 through the still unswitched hydraulic valve F2 flows back into the return.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10348582 A1 [0001]

Claims (9)

Valve arrangement for controlling outbuildings in underground mining, comprising a distributor block ( 10 ) with longitudinal bores ( 12 . 14 ), which are connected to a high-pressure line and to a return line, and a plurality of transverse bores ( 16 . 18 . 20 ), in which main control valves (F1-F18) are arranged, with which a fluid supply from the longitudinal bores ( 12 . 14 ) via one on the manifold block ( 10 ) is controlled to the expansion rack, characterized in that a first longitudinal bore ( 14 ) is a through hole, at both ends of which a connection (P1, P2) is provided, wherein both connections are directly connected to a high pressure supply, and that a second longitudinal bore ( 12 ) is a through hole, at both ends of a terminal (R1, R2) is provided, wherein a return line is connected to both terminals. Valve arrangement according to claim 1, characterized in that the cross section of the longitudinal bores ( 12 . 14 ) is not greater than DN25. Valve arrangement according to at least one of the preceding claims 1 or 2, characterized in that the cross section of the connections (P1, P2, R1, R2) is equal to the cross section of the longitudinal bores (FIG. 12 . 14 ). Valve arrangement according to at least one of the preceding Claims, characterized in that that the main control valves (F1-F8) have a nominal size of DN20. Valve arrangement according to at least one of the preceding claims, characterized in that each main control valve (F1-F8) with its own, electrically separately controllable pilot valve ( 24 ) is provided Valve arrangement according to at least one of the preceding Claims, characterized in that each output via its own pressure hose with the expansion rack in conjunction stands. Valve arrangement according to at least one of the preceding Claims, characterized in that a first and a second outlet via one in each case in the direction of flow arranged pilot-operated check valve with a piston surface connection a cylinder of the expansion rack communicate. Method for controlling a valve arrangement according to at least one of the preceding claims, characterized that for retracting a hydraulic cylinder of the expansion frame two Main control valves are actuated offset in time, or that for extending a hydraulic cylinder of the expansion rack two main control valves be operated offset in time. Valve arrangement according to at least one of the preceding Claims, characterized in that that the temporal Offset is less than 1 second, and preferably between about 10 and 100 ms.