DE2233522C3 - Device for remote control of actuators - Google Patents

Description

The invention relates to a device for remote control of actuators according to the preamble of claim 1.

It is known:

from FR-PS 10 01 331 eione device according to the preamble of claim 1, the purely electrical works, i.e. uses electrical control signals and relays;

from DE-AS 11 62 926 similar to an arrangement for Transmission of a large number of commands to electrical switching contacts, in which the number of Commands to be passed through is greater than the number of transmission paths and on the command issuer side two or more transmission paths are activated according to the commands to be given, each receiver having more than two inputs, all of which address it simultaneously from given commands must be acted upon and according to the rules of combinatorics with control lines are connected, each of which is connected to the control voltage by a button, with the Transmission of the commands from the transmitter to the receiver either pneumatically, electrically or by means of light or sound can be performed and each receiver is responsible for the pneumatic transmission of commands consists of two or more pressure chambers and only allows a command or message if all the pressure chambers belonging to it have been brought under pressure, but this is not the case in detail is described; and

from FR-OS 20 86 344 a fluid control system that Transmits fluid pressure to fluidically controlled members, wherein a fluid logic (fluidics) is provided that on the output side, the fluid switch is applied to each have two circular chambers which are separated by a flexible membrane, e.g. B. a nickel foil, from each other are separated, depending on the pressurization of the two chambers of the fluid in question is open or is closed; According to another version, the Schaller each have a unilaterally fcdcrbcaufschlagte Pistons with a double-T longitudinal section, i.e. with identical end faces at both ends.

The aforementioned known devices with the exception of the last are unsuitable for the Rinsalz in Explosive installations, especially on oil and gas drilling fields, in the chemical, in particular oil processing industry, but also in coal mining, where a fully automatic operation has been since long strived for.

In addition, the F-fluid switches according to the FR-OS 20 86 344 only for very specific input pressures due to the digital design of the control system address why the control system using them is very expensive, namely z. B. at six

There are only ten different actuators can optionally control; therefore, for controlling systems with a large number of actuators,

which are also spatially widely distributed and therefore have correspondingly long transmission lines is completely unsuitable.

In contrast, it is the object of the invention to provide the device for remote control according to the preamble of claim 1 to train hydraulically for reasons of explosion protection by electrical To avoid ignition sparks caused by signals, the training being structurally simple and, above all, manageable should be with regard to the management of the signal channels.

This problem is solved by the teaching according to the characterizing part of claim 1.

The formation of the slide with unequal end faces and the suitable connection of the individual slide with each other each hydraulic control unit, what their Responding only to a very specific control signal combination at their inputs ensures.

An advantageous embodiment of the invention is specified by claim 2, since this Way, the piston of the slide in question also then moved in its against the spring force Position is held, so stores the control signal causing this piston displacement when this Control signal and possibly control signals that arrived earlier are no longer present.

In contrast, the pneumatic receiver according to DE-AS 11 62 926 and the fluid switch according to FR-OS 20 86 344 supplied pressure signals do not save.

An embodiment of the invention is explained in more detail with reference to the drawing. It shows

1 shows the block diagram of the device for remote control of actuators,

Figure 2 is a plan view of a hydraulic control mechanism of the actuators used in the device with cut and

3 shows the same hydraulic control unit in a front view and section III-III of FIG. 2.

The device for remote control of actuators contains control channels 1, 2,3,4 and 5,6, 7,8 and 9, 10, 11, 12 and 13, 14, 15, 16 and 17, 18, 19 and 20, control units 21, 22, 23, 24 and 25 of actuators 26, 27, 28, 29 or 30 and transmission lines 31, 32, 33, 34, 35 and 36, which are connected to a control panel 37. the The number of control channels per actuator and the number of transmission lines that are sent to the control panel 37 are connected is determined by the number of actuators connected to the control panel 37, The number of transmission channels and the number of transmission lines are dependent on one another.

The control channels 1 to 20 and the transmission lines 31 to 36 are connected to one another in such a way that these connections are not repetitive Form combinations that differ from each other through the order in which at least two control channels are connected and - with the same combinations - by the time sequence of the transmission of the control signals via differentiate the selected transmissions! '·' '^ ig'jn.

Here is an embodiment with five control units 21 to 25 and six transmission lines 31 to 36 explained, each with four Sleuerkanäle connected to each control unit.

The control unit 21 is via the control channels 1 to 4 connected to the transmission lines 33, 34, 31 and 32 respectively.

the control unit 22 via the control channels 5 to 8 with the transmission lines 34,31,33 or 32,

the control unit 23 via the control channels 9 to 12 with the transmission lines 35,31,34 or 32,
τ there? Control unit 24 via the control channels 13 to 16 with the transmission lines 34,33,35 or 36 and

the control unit 25 via the control channels 17 to 20 with the transmission lines 35, 34, 31 and 36, respectively.

For switching the control unit 21 through

ι (i from the control panel 37 successively four control signals passed through the transmission lines 33,34,31 and 32, the order of arrival of the signals in the transmission lines mentioned in the above sequence of listing these

ι i lines corresponds, d. h, hits the first control signal one on transmission line 33, the second control signal on transmission line 34, the third Control signal on transmission line 31 and the fourth control signal on transmission line 32.

Accordingly, for the connection of the Control unit 22 four control signals through the transmission lines 34,31,33 and 32, for the connection of the control unit 23 through the transmission lines 35, 31, 34 and 32, for the switching of the

2 ". Control unit 24 through the transmission lines 34, 31, 35 and 36 and for switching through the Control unit 25 passed through the transmission lines 35, 34, 31 and 36, the order of the Arrival of the control signals on the named

jo transmission lines at each control unit of the above cited sequence corresponds to the enumeration of these transmission lines.

Some of the control units 21 to 25 can be connected to transmission lines, e.g. B.

π the control units 21 and 22 to the transmission lines 31 to 34 and the control units 24 and 25 to the transmission lines 31, 34 to 36. These connections but differ from one another in the sequence of the connection and thus the sequence of the

in the arrival of control signals. As mentioned, got there the first control signal to the control unit 21 via the transmission line 33 and to the control unit 22 via the transmission line 34. Correspondingly, the third control signal reaches the control unit 24 via the

ii transmission line 35 and to the control unit 25 via the transmission line31.

By selecting various combinations of the transmission lines 31 to 36 and from various consequences of their connection to the Stcucr-

, II works 21 to 25 and thus the various consequences of the Control signal transmission can therefore optionally switch on each of the actuators 26 to 30.

To turn off each of the actuators 26 to 30, it is sufficient to send control signals in any order

- to pass through the transmission lines to which the respective actuator is connected.

In this way, the number of control units that are connected to the control panel 37 at the same time can be determined according to the formula:

ir.

in I) '.

/; j = number of connected actuators,

η = number of transmission lines;

ι = number of Sleuerkanal,

! = Factorial sign.

For the illustrated embodiment, i.e. η = b and t = 4, m - 360 results.

The control units 21 to 25 used work hydraulically and each contain interconnected Slide 38, 39 and 40 (Fig. 2) with associated distributor elements 41, 42 and 43, wherein the number of slides in each control unit is one less than the number of control channels in the control unit is. In the present embodiment, there are three slides at / = 4.

) edes distributor element 41, 42 and 43 contains a slide seat 44 (F i g. 3) and a sleeve 45, which is of a Spring 46 is cushioned. The piston 47, 48 and 49 (FIG. 2) of each slide 38, 39 and 40 and a housing 50 of the control unit each form a chamber 51, 52 or 53 of smaller cross-section on the smaller one End face of the piston in question and a respective spring chamber 54, 55 and 56 of larger cross-section the larger face of the piston in question, in each of which a spring 57, 58 and 59 is housed. The contact surfaces of the distributor elements have seals (not shown).

The inputs of the hydraulic control unit represent channels 60, 61, 62 and 63, those with the control channels 1, 2, 3 or 4 (FIG. 1) are connected when the control unit 21 acting on the actuator 26 is considered will. The other control units 22 to 25 are constructed in the same way, with channels 60, 61, 62 and 63 each of them in the order named with the first, second, third and fourth control channels of each of the control units 22 to 25 are connected, that is, when viewing the control unit 24 is the channel 60 with the control channel 13. the channel 61 with the control channel 14, the channel 62 with the Control channel 15 and channel 63 are connected to control channel 16.

The channel 60 is in communication with the chamber 51 of the slide 38, the channel 61 with the space 64 below the sleeve 45 of the distributor element 41, the channel 62 with the space 65 of the distributor element 42 and the channel 63 with the space 66 of the distributor element 43.

The chamber 52 of smaller cross section of the slide 39 is also in communication with the aid of a Channel 67 with the space 68 of the slide 38. the chamber 53 of smaller cross-section of the slide 40 Via a channel 69 with the space 70 of the slide 39 and the space 71 of the slide 40 is connected to a channel 72 in connection, which represents the output channel of the entire control unit.

The FpH ρ rk 3 mm he 54 of the slide 38 branches connected via a channel 73 with the chamber of its own distributor element 41, the spring chamber 55 of the Slide 39 via a channel 74 with the space 65 of the distributor element 42 and the spring chamber 56 of the Slide 40 via a channel 75 with the space 66 of the distributor element 43.

An additional piston 76 is arranged in the chamber 52 of smaller cross section of the slide 39 and a space 77 formed by this piston 76 and the housing 50 is communicated through a passage 78 the chamber 53 of smaller cross section of the slide 40 in connection.

Common chambers 79, 80 and 81 of the slides 38 to 40 are connected to a drain line 82.

The hydraulic control unit described works as follows:

In the initial position, in the absence of a signal the channels 60 to 63, the pistons 47 to 49 displaced by the pressure of the springs 57 to 59 in such a way that the chambers in the control unit are connected as described above.

The first control signal arrives at channel 60 and moves piston 47 against the force of spring 57, the sleeve 45 (see FIG. 3) of the distributor element 41 being adjusted at the same time as the piston 47, so that the room 64 with the room 68 in connection

ίο comes.

The working medium flows out of the spring chamber 54 via the channel 73 and then on the distributor element 41 past into the common chamber 79, which is connected to the drain line 82.

The second control signal then passes from channel 61 (see FIG. 3) into space 64, which - there with the piston

47 whose distributor element 41 has also been moved into the right end position by the first control signal - in communication with the chamber 52 via the channel 67

2 »so that the second control signal drives the piston 48 of the second slide against the resistance of the spring 58 adjusted. The working medium is from the Spring chamber 55 via channel 74 into space 65 and then past the distributor element 42 into the common Chamber 80, which is connected to the discharge line 82. Stand in the right end position of the piston 48 the rooms 65 and 70 in connection.

The third control signal arrives in the channel 62, which is connected to the room 65 (see also FIG. 3).

κι and gets there because the piston 48 and the Distributor element 42 are in the right end position, via channel 69 into chamber 53 and adjusts the piston 49 by overcoming the resistance of the spring 59 and the working medium as the Spring chamber 56 displaced via the channel 75 and the space 66 in the channel 63, which at this point in time the drain line 82 is in communication. In the right end position of the piston 49 below the sleeve of the distributor element 43 are the channels 63 and 72

41) connected to each other.

The fourth control signal is channeled into the 63rd channel communicates with the channel 72, and thus to the output of the slide control unit and from there to the Input of actuator 26.

ι; The working medium also reaches the space 77 via the channels 69 and 78, whereby the piston

48 is also held in the right end position, when the channels 60 and 61 and the chamber 52 are in communication with the drain line 82, so that

5 (i first and second control signals transmitted to channels 60 and 6! have arrived, even if they are due to the connection of channels 60 and 61 to the drain line 82 are at least no longer effective.

LJm to reset the control unit to the starting position in which the channel 72 with the drain line 82 in Is connected, the channels 63 and 62 or all channels 60 to 63 in any order with the To put drain line 82 in connection.

bo If the control signals reach channels 60 to 63 in in a different order, the control unit does not respond:

Assume that a first control signal does not reach channel 60, but either channel 61 or the channel 62 or the channel 63, then these channels 61 to 63 are each associated with one of the spring chambers 54 to 56 and thus also the larger face of the associated piston 47, 48 or 49 over the one of the

Spaces 64 to 66 'below the sleeve of the associated Distribution elements 41 to 43 in connection, which are blocked by the working medium.

If now a second control signal z. B. is placed on the channel 60 and thus enters the chamber 51, so to the smaller end face of the piston 47, this cannot be adjusted if the The first control signal acts on the larger end face of the piston 47 via the channel 61.

On the other hand, the first control signal should not be on the channel

61, but rest on the channel 62, the piston 47 could indeed be displaced so that a then into the A third control signal arriving at channel 61 could act on the smaller face of piston 48, however, this would bear against the larger end face of the piston 48 from the first channel 62 Control signal exclude a displacement of the piston 48, so that no control signal forwarding could take place at the output of the hydraulic control unit.

For this purpose 2 sheets of drawings

Claims (2)

2r> Claims: 1. Device for remote control of actuators, each of which is connected to transmission lines via at least two control channels,
the number of which is at least three and via which control signals can be transmitted from a control panel, whereby m = n! / (nt)! ^lü possible combinations of connections can be formed by different chronological order of the control signals transmitted over the transmission lines and the control channels, with m as the number of actuators to be controlled,
η as the number of transmission lines,
1 as the number of control channels and
! as a symbol for faculty, characterized,
that hydraulic control units (21 to 25) are provided, each of which each assigned to one of the actuators (26 to 30) and slides connected to one another by channels (38 to 40) each with a distributor element (41 to 43), where the number of slides in each control unit is one less than the number of the Control unit (e.g. 21) belonging control channels (e.g. Ibis 4), that each slide (38 to 40) has two unequally large end faces, the larger of which is spring-loaded and the smaller of which can be acted upon by one of the hydraulic control signals,
in that the first (at 60) incoming control signal is routed directly to the smaller face of the first slide (38) assigned to it in order to adjust it against the spring force and thereby clear the path via the distributor element (41) for the second (at 61) incoming control signal to the input of the associated actuator (e.g. 26) or, if a second slide (39) is present, to its smaller end face, wherein the third (at 62) incoming control signal is via the distributor element (42) of the second slide (39) to the input of the associated actuator (e.g. 26) or, if a third slide (40) is present, reaches the smaller end face, which process is repeated for any additional slide that may be present, so that the control signal arriving last reaches the assigned actuator (e.g. 26),
the control channels (e.g. 1 to 4) being connected to the slides (38 to 40) of each control unit (21 to 25) in such a way that because the ^ tc control signal (k> I) only acts on the large end face of the (Ar-i) -th slide when the (k- I) -Ie control signal has failed, so that the (k- I) -th slide remains blocked and the k-ic control signal cannot be interrupted. 2. Kinrichtung according to claim I,
characterized, that if the control unit has at least three sliders has, except in the grief (52) on the smaller face of each slide (/ .. IJ. 39) 41 the first and the last slider (38,40), an additional piston (76) is arranged, which forms a space (77) with the slide housing (30), which is connected to the chamber (53) at the smaller end face of the following in the direction of the associated actuator slide (40) (FIG. 2.3).