CN210566569U - Circuit for a control device - Google Patents

Circuit for a control device Download PDF

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Publication number
CN210566569U
CN210566569U CN201921366559.0U CN201921366559U CN210566569U CN 210566569 U CN210566569 U CN 210566569U CN 201921366559 U CN201921366559 U CN 201921366559U CN 210566569 U CN210566569 U CN 210566569U
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CN
China
Prior art keywords
vent valve
safety vent
fluid
inlet
outlet
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Active
Application number
CN201921366559.0U
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Chinese (zh)
Inventor
D·瓦葛那-斯图尔兹
S·蒂茨
S·弗吕林
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Samson AG
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Samson AG
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Publication date
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Publication of CN210566569U publication Critical patent/CN210566569U/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/31552—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line
    • F15B2211/31558—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line having a single output member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/355—Pilot pressure control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7052—Single-acting output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/875—Control measures for coping with failures
    • F15B2211/8752—Emergency operation mode, e.g. fail-safe operation mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/885—Control specific to the type of fluid, e.g. specific to magnetorheological fluid
    • F15B2211/8855—Compressible fluids, e.g. specific to pneumatics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B5/00—Transducers converting variations of physical quantities, e.g. expressed by variations in positions of members, into fluid-pressure variations or vice versa; Varying fluid pressure as a function of variations of a plurality of fluid pressures or variations of other quantities
    • F15B5/006—Transducers converting variations of physical quantities, e.g. expressed by variations in positions of members, into fluid-pressure variations or vice versa; Varying fluid pressure as a function of variations of a plurality of fluid pressures or variations of other quantities with electrical means, e.g. electropneumatic transducer

Abstract

The invention relates to a circuit for an adjusting device, comprising a supply port, a single-acting fluid drive for the adjusting device, which has a position controller having at least one fluid inlet and at least one first fluid control outlet, which is directly or indirectly connected to the fluid drive, and a first safety vent valve having a fluid control inlet and connected to the fluid drive for venting the drive in the absence of pressure at the fluid inlet of the position controller, wherein the position controller has a second fluid control outlet and is provided with a second safety vent valve which, in the operating state, connects the second fluid control outlet to the control inlet of the first safety vent valve, so that the second safety vent valve switches to the venting position in the venting state, whereby said first safety vent valve vents said fluid drive mechanism.

Description

Circuit for a control device
Technical Field
The utility model relates to a circuit, especially safety circuit for adjusting device.
SUMMERY OF THE UTILITY MODEL
The object of the invention is to specify a circuit for operating an adjusting device, in which an adjustment time that is as short as possible is obtained.
The circuit for a regulating device according to the invention, and in particular the safety circuit, comprises a supply port which can be connected to a fluid source, and in particular a pneumatic source, such as for example a compressed gas supply source. The safety circuit also comprises a fluid drive, and in particular a pneumatic drive, of the regulating device, which is to be blocked, acting in one direction.
The circuit further comprises a position regulator comprising at least one fluid inlet, in particular a pneumatic inlet, and at least one first fluid control outlet, in particular a pneumatic control outlet, wherein the first control outlet is connected to the control inlet of the pressure booster. In this way, the exhaust gas properties can be determined by the control outlet of the position regulator.
Furthermore, the circuit has a first safety vent valve which has a fluid control inlet, in particular a pneumatic control inlet, and is connected to the drive for venting it in the event of a venting.
According to the invention, the position regulator has a second fluid control outlet and in particular a pneumatic control outlet. The circuit also has a second safety vent valve which, in the operating state, connects the second control outlet to the control inlet of the first safety vent valve, wherein the control inlet is connected to the position controller and the second safety vent valve is switched to the vent position in the vent state, so that the first safety vent valve vents the drive mechanism.
In this way, the first safety valve which vents the drive mechanism can be influenced by the second safety vent valve which is connected to the second control inlet, even when the inlet of the position regulator is supplied with operating pressure. The drive can therefore also be discharged more quickly in the operating state, since the first safety valve can be supported as a function of the operating discharge.
However, the venting is maintained even if the inlet at the position controller is rendered pressure-free, since the second safety vent valve is vented in this case and therefore also switches the control inlet on the first safety valve to pressure-free, so that the drive mechanism is also vented reliably in this case.
In this way, the control speed of the actuating drive can be increased in the operating state in addition to the maintenance of the exhaust gas by means of the first safety valve in the event of a fault.
According to a first advantageous embodiment, the second safety vent valve is a fluid-controlled safety vent valve which has a fluid control inlet, in particular a pneumatic control inlet. The control inlet of the second safety vent valve may be connected to the pneumatic inlet on the position regulator. In the exhaust situation, i.e. when there is no pressure at the inlet of the position controller, the second safety exhaust valve is therefore switched to the exhaust position, whereby the first safety exhaust valve exhausts the drive mechanism. The utility model discloses no pressure in the meaning means that pressure reduces to be less than the allowable operating pressure.
According to an alternative design, the second safety vent valve may be an electronically controlled valve, and in particular a safety solenoid valve, having an electronically controlled inlet. In this case, the second safety vent valve may be connected to an electrically controlled outlet of the position regulator. An exhaust event occurs when the control signal falls below a predetermined threshold, particularly in the absence of the control signal. This may be facilitated, for example, by an "emergency shutdown" function. Accordingly, the second safety vent valve is then switched to the vent position, whereby the first safety vent valve vents the drive mechanism.
Preferably, the circuit may have a pressure intensifier, wherein the drive mechanism is indirectly connected to the first fluid control outlet through the pressure intensifier. The supercharger may have a supercharger outlet, a control inlet, and a supply inlet connected to a supply port. The supercharger is therefore used for rapid intake of the drive mechanism in operating conditions.
The circuit preferably comprises a third safety vent valve which can be connected between the first control outlet and the drive, in particular between the booster outlet and the drive, in order to vent the drive in the event of a venting, in particular when there is no pressure at the inlet of the position controller, and in other cases to connect the drive to the position controller, in particular to the booster.
The exhaust gas line can thereby be additionally improved in the event of the position controller inlet becoming pressureless.
Preferably, a control inlet of the third safety vent valve is connected to an outlet of the second safety vent valve. This makes it possible for a third safety vent valve to be incorporated in the operating state, as a result of which the venting efficiency can also be increased further during operation.
According to a further advantageous design, the circuit may comprise a safety solenoid valve which, in normal operation, connects the inlet of the position regulator to the supply port and, in the event of a fault, vents the inlet of the position regulator.
This makes it possible to achieve venting, for example, in the event of a power failure of the position controller.
Preferably, the first safety vent valve and/or the second safety vent valve and/or the third safety vent valve and/or the safety solenoid valve are designed as two-position three-way valves.
Components that survive the test can be used.
Drawings
Other advantages, features and applications of the present invention may be derived from the following description taken in conjunction with the embodiments as shown in the figures.
The terms and corresponding reference numerals used in the following list of reference numerals are used in the specification, claims and drawings to illustrate:
figure 1 shows a circuit according to the invention according to a first embodiment,
figure 2 shows a circuit according to the invention according to a second embodiment,
fig. 3 shows a circuit of the invention according to a third embodiment, an
Fig. 4 shows a circuit according to the invention according to a fourth embodiment.
List of reference numerals
10 circuits;
12 a compressed air port;
14 a drive mechanism;
16 an adjustment device;
18a supercharger;
18a supercharger outlet;
18b control inlet;
18c a supply inlet;
20a position adjuster;
20a, 20b pneumatically controlling the outlet;
20c electrically controlling the outlet;
20e a pneumatic inlet;
22a first safety vent valve;
22a valve outlet;
22b port;
22s control inlet;
24a second fluid-controlled safety vent valve;
24a valve outlet;
a 24c port;
24s control entry;
25a second electrically controlled safety vent valve;
25a valve outlet;
a 25c port;
25s control entry;
26a third safety vent valve;
26a valve outlet;
26c ports;
26s control inlet;
28 a safety solenoid valve;
40 circuits;
50 circuits;
60 circuits.
Detailed Description
Fig. 1 shows a circuit 10 of the present invention connected to a compressed air source 12. The circuit also comprises a single-acting pneumatic drive 14 for the adjusting device 16. The circuit also includes a booster 18 that includes a booster outlet 18a, a control inlet 18b, and a supply inlet 18c that is connected to the compressed air source 12. The circuit 10 also includes a position regulator 20 having at least two pneumatically controlled outlets 20a, 20b and one pneumatically controlled inlet 20 e. The first control outlet 20a is connected to the control inlet 18b of the supercharger 18 so that the supercharger 18 can be controlled by the position regulator 20, whereby the drive mechanism 14 is rapidly charged as required. The inlet 20e of the position regulator is connected to the compressed air port 12.
The circuit 10 also comprises a first safety vent valve 22, which is designed as a two-position three-way valve and has one pneumatic control inlet 22s and is connected with its valve outlet 22a to the pneumatic drive 14 in order to vent the pneumatic drive via port 22b when the control inlet 22s is at no pressure, and to block said port 22a in the operating situation.
According to the utility model discloses, be equipped with second safety vent valve 24, it also designs into two three-way valves. The second safety vent valve 24 is connected at its control inlet 24s to the inlet 20e of the position regulator 20. The safety vent valve 24 vents as soon as the inlet 20e is pressureless.
The valve outlet 24a is connected to the control inlet 22s of the first relief valve 22. This results in the first safety vent valve 22 also being switched to the vent position in the vent position of the safety vent valve 24.
However, in the operating condition, the safety vent valve 24 communicates the second control outlet 20b of the position regulator 20 to the control inlet 22s of the safety valve 22 through a port 24 c. In this way, the safety valve 20 can also be set in the venting position in the operating state, i.e. when the operating pressure 20 is present at the inlet 20e of the position controller 20, so that the drive 14 can be vented more quickly. This shortens the reaction time of the regulating device 16.
Fig. 2 shows a circuit 40 according to the invention according to a second embodiment, the basic structure of which corresponds to the circuit 10 according to fig. 1. Accordingly, the same reference numerals are used for the same components.
The circuit 40 differs from the circuit 10 according to fig. 1 in that, in addition to the components of the circuit according to fig. 1, a third safety vent valve 26 is provided, which is connected between the pressure booster 18 and the drive mechanism 14, and a safety solenoid valve 28 is provided between the inlet 20e of the position controller 20 and the compressed air source 12. By means of the safety solenoid 28, the inlet 20e of the position regulator 20 is switched to no pressure, for example when the current is switched off, and subsequently the safety vent valves 22, 24, 26 are also vented.
The third safety vent valve 26 is connected at its control inlet 26s to the inlet 20e of the position regulator 20. Accordingly, the safety vent valve 26 vents the drive mechanism 14 when the inlet 20e at the position regulator 20 is pressureless. In operation, the safety exhaust valve 26 communicates the volume booster 18 to the drive mechanism 14 through the valve outlet 26a and port 26 c.
While the first safety vent valve 22 may be vented when the control outlet 20b is switched to no pressure, also under operating conditions, as described in figure 1.
Fig. 3 shows a circuit 50 according to the invention, which corresponds to the circuit 40 according to fig. 2 with regard to its component parts.
The difference between the circuit 50 according to fig. 3 and the circuit 40 according to fig. 2 is that the control inlet 26s of the second safety vent valve 26 is not connected to the inlet 20e of the position regulator 20, but is connected to the control inlet 22s of the safety vent valve 22, which safety vent valve 22 is in turn connected to the output port 24a of the safety vent valve 24. As described in fig. 1, the exhaust gas can thus be controlled in operation by means of the regulating pressure via the control outlet 20 b. This is no longer only the first safety vent valve 22, but also the third safety vent valve 26, depending on the design of the circuit 50. In this way, a more efficient venting can also be provided in the operating situation, since the drive mechanism 14 can be vented more quickly via the two safety vent valves 22, 24.
Fig. 4 shows another embodiment of the circuit 60 of the present invention, which is connected to the compressed air source 12.
The circuit also comprises a single-acting pneumatic drive 14 for the adjusting device 16. The circuit 60 also includes a position regulator 20 having at least two pneumatically controlled outlets 20a, 20b and one pneumatically controlled inlet 20 e. The first control outlet 20a is connected to the drive mechanism 14. By controlling the outlet 20a, the drive mechanism 14 can be controlled by a position regulator 20, which is connected with its inlet 20e to the compressed air port 12.
The circuit 60 also includes a first safety vent valve 22 in the form of a two-position, three-way valve having a pneumatic control inlet 22s and connected at its valve outlet 22a to the pneumatic drive 14 to vent the pneumatic drive through port 22b when the control inlet 22s is pressureless and in the operating condition port 22a is blocked.
According to the utility model discloses, be equipped with second safety vent valve 25, it designs into two three-way solenoid valves. The second safety vent valve 25 is connected at its electrical control inlet 25s to the electrical position adjustment outlet 20c of the position adjuster 20. The safety vent valve 25 vents once the control signal transmitted via the control outlet 20c is below a predetermined threshold or absent.
The valve outlet 25a is connected to the control inlet 22s of the first relief valve 22. This results in the first safety vent valve 22 also being switched to the venting position in the venting position of the safety vent valve 25.
In operating conditions, however, the safety vent valve 25 connects the second control outlet 20b of the position regulator 20 to the control inlet 22s of the safety valve 22 via port 25 c. In this way, the safety valve 20 can also be set in the venting position in the operating state, i.e. when there is operating pressure at the inlet 20e of the position regulator 20, as a result of which the drive mechanism 14 can be vented more quickly. This shortens the reaction time of the regulating device 16.

Claims (9)

1. An electric circuit (10,40,50,60) for a regulating device (16), characterized in that the electric circuit comprises a supply port (12), a fluid drive mechanism (14) for the unidirectional action of the regulating device (16) having a position regulator (20) comprising at least one fluid inlet (20e) and at least one first fluid control outlet (20a), wherein the first fluid control outlet (20a) is directly or indirectly connected to the fluid drive mechanism (14), and a first safety vent valve (22) having a fluid control inlet (22s) and being connected to the fluid drive mechanism (14) for venting the fluid drive mechanism in the absence of pressure at the fluid inlet (20e) of the position regulator (20), wherein the position regulator (20) has a second fluid control outlet (20b), and a second safety vent valve (24,25) is provided, which in the operating state connects the second fluid control outlet (20b) to the control inlet (22s) of the first safety vent valve (22), so that in the venting state the second safety vent valve (24,25) is switched into the venting position, whereby the first safety vent valve (22) vents the fluid drive (14).
2. A circuit according to claim 1, characterized in that the second safety vent valve is a fluid-controlled safety vent valve (24), wherein the control inlet (24s) of the second safety vent valve (24) is connected to the fluid inlet (20e) on the position regulator (20), whereby the second safety vent valve switches to a vent position in a venting situation when there is no pressure at the fluid inlet (20e) of the position regulator (20).
3. A circuit according to claim 1, characterized in that the second safety vent valve is an electrically controlled safety vent valve (25), the control inlet (25s) of which is connected to the electrically controlled outlet (20c) of the position regulator, wherein the second safety vent valve (25) is switched to the vent position when the signal at the control outlet is below a predetermined threshold value.
4. A circuit according to any preceding claim, wherein the fluid drive mechanism (14) is indirectly connected to the first fluid control outlet (20a) by a booster (18) for inlet air to the fluid drive mechanism (14), wherein the booster comprises a booster outlet (18a), a control inlet (18b) and a supply inlet (18c) connected to the supply port (12).
5. A circuit according to claim 1, characterized in that a third safety vent valve (26) is provided having a fluid control inlet (26s) and connected between the control outlet (20a) and the fluid drive (14) for venting the fluid drive (14) in the venting position of the second safety vent valve (24,25) and for otherwise connecting the fluid drive (14) to the pressure booster (18).
6. An electric circuit according to claim 5, characterized in that the control inlet (26s) of the third safety vent valve (26) is connected to the valve outlet (24a,25a) of the second safety vent valve (24, 25).
7. A circuit according to claim 1, characterized in that a safety solenoid valve (28) is provided which in the operating situation connects the fluid inlet (20e) of the position regulator (20) to the supply port (12) and in the event of a fault vents the fluid inlet (20e) of the position regulator (20).
8. Circuit according to claim 5, characterised in that the first safety vent valve (22) and/or the second safety vent valve (24) and/or the third safety vent valve (26) and/or the safety solenoid valve (28) are designed as two-position three-way valves.
9. A circuit according to claim 5, characterized in that a third safety vent valve (26) is provided having a fluid control inlet (26s) and connected between the pressure booster outlet (18a) and the fluid drive (14) for venting the fluid drive (14) in the venting position of the second safety vent valve (24,25) and for otherwise connecting the drive (14) to the pressure booster (18).
CN201921366559.0U 2018-08-22 2019-08-21 Circuit for a control device Active CN210566569U (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202018104833.3 2018-08-22
DE202018104833.3U DE202018104833U1 (en) 2018-08-22 2018-08-22 Circuit for a control valve

Publications (1)

Publication Number Publication Date
CN210566569U true CN210566569U (en) 2020-05-19

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ID=63679303

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921366559.0U Active CN210566569U (en) 2018-08-22 2019-08-21 Circuit for a control device

Country Status (2)

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CN (1) CN210566569U (en)
DE (1) DE202018104833U1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10746314B2 (en) 2018-09-14 2020-08-18 Fisher Controls International Llc Positioner apparatus for use with fluid valves
DE102021110456A1 (en) 2021-04-23 2022-10-27 Bürkert Werke GmbH & Co. KG Safety module for a process valve and system

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