CN216590201U - A safety valve island - Google Patents

Abstract

The utility model discloses a safety valve island, include: the valve island comprises a bus unit (1), an interlocking unit (2) and a valve island (3), wherein the interlocking unit (2) is provided with a bus input interface (21) and an external bypass signal input interface (22), the bus input interface (21) is electrically connected with the bus unit (1), and the bus input interface (21) is electrically connected with a solenoid valve control end of the valve island (3) after being interlocked with the external bypass signal input interface (22). The utility model discloses a set up the interlocking unit to outside bypass signal input interface has been increased, the bus signal of bus unit carries out the interlocking back with the outside IO signal of outside bypass signal input interface, to the solenoid valve control end output signal of valve island. The utility model discloses, the actual state of valve island receives the dual management of bus and outside IO signal, has increased the safe condition of its work, reduces the probability that risk factors such as electromagnetic interference, maloperation lead to the dangerous action of equipment.

Description

A safety valve island

technical field

The utility model relates to the technical field of electrical control, in particular to a safety valve island.

Background technique

A valve terminal is an electrical control element used to control multiple solenoid valves. By inputting high level and low level to the solenoid valve control terminal of the valve island, the on-off of the corresponding solenoid valve is controlled.

The existing valve island generally only receives the bus signal, converts the bus signal into the corresponding solenoid valve driving signal, and sends it to the solenoid valve control end to open the solenoid valve driving path, thereby realizing the solenoid valve driving, and realizing the follow-up actuator action. .

Each actuator can be driven by the solenoid valve of the valve island by means of centralized piping of the bus valve island. However, for some special equipment, such as physical vapor deposition equipment, only the bus signal control is not enough security.

Utility model content

Based on this, it is necessary to provide a safety valve island for the technical problem that the valve island in the prior art is not safe enough.

The utility model provides a safety valve island, comprising: a bus unit, an interlocking unit and a valve island, the interlocking unit is provided with a bus input interface and an external bypass signal input interface, the bus input interface is connected to the bus unit The bus input interface and the external bypass signal input interface are interlocked and electrically connected to the solenoid valve control end of the valve island.

Further, the bus input interface includes a plurality of bus input terminals, each of the external bypass signal input interfaces includes a plurality of external bypass signal input terminals, and the valve island includes a plurality of the solenoid valve control ends, Each of the bus input terminals is interlocked with an external bypass signal input terminal and is electrically connected to a control terminal of the solenoid valve.

Further, the interlocking unit further includes a plurality of interlocking circuits, each of the interlocking circuits includes a first controllable switch, a second controllable switch, an output terminal of the interlocking circuit, and a ground terminal;

The first input end of the first controllable switch is electrically connected to one of the bus input terminals, the first output end of the first controllable switch is electrically connected to the output end of the interlock circuit, and the interlock circuit The output end is electrically connected to a control end of the solenoid valve;

The bus input terminal is also electrically connected to the second input terminal of the second controllable switch through the first voltage dividing resistor and the second voltage dividing resistor, and the second output terminal of the second controllable switch is electrically connected to the ground terminal. connection, the connection point of the first voltage dividing resistor and the second voltage dividing resistor is electrically connected to the first control terminal of the first controllable switch, and the external bypass signal input terminal is connected to the second control terminal. The second control terminal of the controllable switch is electrically connected.

Still further, the first controllable switch is a first triode, and the second controllable switch is a second triode;

The first input terminal is the collector of the first triode, the first output terminal is the emitter of the first triode, and the first control terminal is the first triode or the first input terminal is the emitter of the first triode, the first output terminal is the collector of the first triode, and the first control terminal is the the base of the first triode;

The second input terminal is the collector of the second triode, the second output terminal is the emitter of the second triode, and the second control terminal is the second triode or the second input terminal is the emitter of the second triode, the second output terminal is the collector of the second triode, and the second control terminal is the The base of the second triode.

Still further, the interlock circuit further includes a diode, the anode of the diode is electrically connected to the ground terminal, and the cathode of the diode is electrically connected to the output terminal of the interlock circuit.

Still further, the interlocking unit further includes a casing, the interlocking circuit is accommodated in the casing, and the bus input interface and the external bypass signal input interface are respectively fixed on the surface of the casing.

Still further, the housing includes a front wall and a first side wall, the bus input interface is fixed on the first side wall, and the external bypass signal input interface is fixed on the front wall.

Still further, the housing further includes a second side wall away from the first side wall, the second side wall is provided with a through hole, and the output end of the interlock circuit of the interlock circuit passes through the through hole. is electrically connected to the control end of the solenoid valve.

The utility model increases the external bypass signal input interface by setting the interlocking unit. After the bus signal of the bus unit and the external I/O signal of the external bypass signal input interface are interlocked, the control terminal of the solenoid valve of the valve island is output signal. In the utility model, the actual state of the valve island is double managed by the bus and external I/O signals, which increases the safety conditions for its work and reduces the probability of dangerous actions of the equipment caused by risk factors such as electromagnetic interference and misoperation.

Description of drawings

Fig. 1 is the front view of a kind of safety valve island of the present utility model;

Fig. 2 is the top view of a kind of safety valve island of the present utility model;

3 is a circuit diagram of an interlock circuit according to an embodiment of the present invention;

4 is a front view of an interlocking unit according to an embodiment of the present invention;

5 is a left side view of an interlocking unit according to an embodiment of the present invention;

6 is a right side view of an interlocking unit according to an embodiment of the present invention;

7 is a system schematic diagram of a safety valve island according to an embodiment of the present invention.

tag description

1-Bus unit; 2-Interlock unit; 21-Bus input interface; 211-Bus input terminal; 22-External bypass signal input interface; 221-External bypass signal input terminal; 23-Interlock circuit; 231-Part A controllable switch; 232- the second controllable switch; 233- the output terminal of the interlock circuit; 234- the ground terminal; 235- the first voltage dividing resistor; 236- the second voltage dividing resistor; 237- the diode; Resistor; 239-fourth resistor; 24-housing; 241-front wall; 242-first side wall; 243-second side wall; 244-through hole; 3-valve island; 4-main controller; 5-control System; 6-Customer selection equipment.

Detailed ways

The present utility model will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1 to FIG. 6 , a safety valve island of the present invention includes a bus unit 1, an interlocking unit 2 and a valve island 3. The interlocking unit 2 is provided with a bus input interface 21 and an external bypass signal. The input interface 22, the bus input interface 21 is electrically connected with the bus unit 1, and the bus input interface 21 and the external bypass signal input interface 22 are interlocked with the solenoid valve control terminal of the valve island 3. connect.

Specifically, the safety valve island of the present invention is composed of a bus unit 1 (SI), an interlock unit 2 and a valve island 3, and each part is connected in sequence according to the transmission direction of the bus signal. The function of the bus unit 1 is to form the actual drive command of the bus and provide the drive power; the interlock unit 2 receives the bus command from the bus input interface 21, and receives the external bypass I/O command from the external bypass signal input interface 22, so as to realize the On-off control of the drive main channel; valve island 3 is the actual operating load. The valve island 3 includes a plurality of solenoid valves, and the on-off of the solenoid valves realizes the actions of the connected actuators. The solenoid valve of valve island 3 is controlled by the solenoid valve control terminal. For example, when the control end of the solenoid valve receives a high level, the corresponding solenoid valve is opened, and when the control end of the solenoid valve receives a low level, the corresponding solenoid valve is closed. Or when the control end of the solenoid valve receives a low level, the corresponding solenoid valve is opened, and when the control end of the solenoid valve receives a high level, the corresponding solenoid valve is closed.

As shown in FIG. 7 , when the system is working, the bus unit 1 uses field bus communication to receive commands from the external main controller 4 , such as through standard bus protocol communication, to receive PLC commands from the main controller 4 . The main controller 4 may control the system for the client. At the same time, an external control system 5 , such as a client control system, provides driving power to the bus unit 1 . The bus unit 1 converts the serial communication information into the corresponding solenoid valve drive signal, and transmits it to the interlock unit 2 through the bus input interface 21. The interlock unit 2 communicates with the customer through the external bypass signal input interface 22 (D-SUB). The external I/O signal output interface of the device 6 (such as the I/O unit of the PLC) is connected, and the customer selects the device 6 to input the external control signal, and the external control signal can be multiple external control signals. The bus input interface 21 and the input signal of the external bypass signal input interface 22 are interlocked and output to the solenoid valve control end of the valve island 3 . Therefore, in order to drive the solenoid valve of valve island 3 to act, only the solenoid valve driving signal output by bus unit 1 and the external unlocking I/O signal output by customer's optional device 6 are sent to interlock unit 2, so that the solenoid valve can be turned on. The valve drive path, and then realize the solenoid valve drive, and realize the follow-up actuator action.

The utility model increases the external bypass signal input interface by setting the interlocking unit. After the bus signal of the bus unit and the external I/O signal of the external bypass signal input interface are interlocked, the control terminal of the solenoid valve of the valve island is output signal. In the utility model, the actual state of the valve island is double managed by the bus and external I/O signals, which increases the safety conditions for its work and reduces the probability of dangerous actions of the equipment caused by risk factors such as electromagnetic interference and misoperation.

As shown in FIG. 1 to FIG. 6 , a safety valve island of the present invention includes a bus unit 1, an interlocking unit 2 and a valve island 3. The interlocking unit 2 is provided with a bus input interface 21 and an external bypass signal. The input interface 22, the bus input interface 21 is electrically connected with the bus unit 1, and the bus input interface 21 and the external bypass signal input interface 22 are interlocked with the solenoid valve control terminal of the valve island 3. The bus input interface 21 includes a plurality of bus input terminals 211, each of the external bypass signal input interfaces 22 includes a plurality of external bypass signal input terminals 221, and the valve island 3 includes a plurality of the solenoid valves a control terminal, each of the bus input terminals 211 is electrically connected to a control terminal of the solenoid valve after being interlocked with an external bypass signal input terminal 221;

The interlocking unit 2 further includes a plurality of interlocking circuits 23, each of the interlocking circuits 23 includes a first controllable switch 231, a second controllable switch 232, an interlocking circuit output terminal 233, a ground terminal 234, and a diode 237, the anode of the diode 237 is electrically connected to the ground terminal 234, and the cathode of the diode 237 is electrically connected to the output terminal 233 of the interlock circuit;

The first input end of the first controllable switch 231 is electrically connected to a bus input terminal 211, and the first output end of the first controllable switch 231 is electrically connected to the interlock circuit output end 233, so The output end 233 of the interlock circuit is electrically connected to a control end of the solenoid valve;

The bus input terminal 211 is also electrically connected to the second input terminal of the second controllable switch 232 through the first voltage dividing resistor 235 and the second voltage dividing resistor 236 , and the second output of the second controllable switch 232 The terminal is electrically connected to the ground terminal 234, the connection point of the first voltage dividing resistor 235 and the second voltage dividing resistor 236 is electrically connected to the first control terminal of the first controllable switch 231, an external bypass The channel signal input terminal 221 is electrically connected to the second control terminal of the second controllable switch 232;

The first controllable switch 231 controls the connection or disconnection of the first input end and the first output end according to the signal of the first control end, and the second controllable switch 232 controls the connection of the second input end and the second output end according to the signal of the second control end or disconnect;

The first controllable switch 231 is a first triode, and the second controllable switch 232 is a second triode;

The first input terminal is the collector of the first triode, the first output terminal is the emitter of the first triode, and the first control terminal is the first triode or the first input terminal is the emitter of the first triode, the first output terminal is the collector of the first triode, and the first control terminal is the the base of the first triode;

The second input terminal is the collector of the second triode, the second output terminal is the emitter of the second triode, and the second control terminal is the second triode or the second input terminal is the emitter of the second triode, the second output terminal is the collector of the second triode, and the second control terminal is the The base of the second triode;

As shown in FIG. 4 to FIG. 6 , the interlocking unit 2 further includes a housing 24, the interlocking circuit 23 is accommodated in the housing 24, the bus input interface 21, and the external bypass signal input The interfaces 22 are respectively fixed on the surface of the casing 24. The casing 24 includes a front wall 241, a first side wall 242, and a second side wall 243 away from the first side wall 242. The bus input interface 21 is fixed On the first side wall 242 , the external bypass signal input interface 22 is fixed on the front wall 241 , and the second side wall 243 is provided with a through hole 244 . The lock circuit output end 233 is electrically connected to the solenoid valve control end through the through hole 244 .

Specifically, the safety valve island of this embodiment includes multiple bus input terminals 211 , multiple external bypass signal input terminals 221 , and multiple solenoid valve control terminals, for example, includes 32 bus input terminals 211 and 32 external bypass signal input terminals 221 . The bypass signal input terminal 221 and 32 solenoid valve control ends, each solenoid valve control end controls one solenoid valve of the valve island 3 . As shown in FIG. 3 , one group of interlock circuits 23 is shown, and each interlock circuit corresponds to a bus input terminal 211 , an external bypass signal input terminal 221 , and a solenoid valve control terminal. In FIG. 3 , the first controllable switch 231 is a first triode, the second controllable switch 232 is a second triode, and the first input terminal is the emitter of the first triode , the first output terminal is the collector of the first triode, the first control terminal is the base of the first triode, and the second input terminal is the second triode The second output terminal is the emitter of the second triode, and the second control terminal is the base of the second triode. Its circuit principle is as follows:

When the bus input terminal 211 and the external bypass signal input terminal 221 input a high level, the second controllable switch 232 is turned on, that is, the collector and the emitter of the second transistor are turned on. The high level will be divided by the first voltage dividing resistor 235 and the second voltage dividing resistor 236, so that the first controllable switch 231 is turned on, that is, the collector and the emitter of the first triode are turned on, thus in the interlock circuit The output terminal 233 outputs a high level, and outputs a high level to the control terminal of the solenoid valve to realize the reversing action of the solenoid valve.

However, if the bus input terminal 211 inputs a low level and the external bypass signal input terminal 221 inputs a high level, the second controllable switch 232 is turned on. However, since the bus input terminal 211 inputs a low level, the first controllable switch 232 is turned on The control switch 231 remains off, the output terminal 233 of the interlock circuit has no voltage output, and the solenoid valve has no action.

If the bus input terminal 211 inputs a high level and the external bypass signal input terminal 221 inputs a low level, the second controllable switch 232 is turned off, so the branches where the first voltage dividing resistor 235 and the second voltage dividing resistor 236 are located are disconnected Therefore, the first controllable switch 231 is still turned off, the output terminal 233 of the interlock circuit has no voltage output, and the solenoid valve has no action.

If a low level is input to the bus input terminal 211 and a low level is input to the external bypass signal input terminal 221, the output terminal 233 of the interlock circuit has no voltage output, and the solenoid valve does not operate.

It can be seen from this that the interlock circuit 23 interlocks the input signals of the bus input terminal 211 and the external bypass signal input terminal 221, and only when the bus input terminal 211 and the external bypass signal input terminal 221 are both input high level, the interlocking The circuit output terminal 233 will output a high level.

A diode 237 is arranged between the output terminal 233 of the interlock circuit and the ground terminal 234 to prevent reverse current flow. A third resistor 238 is connected in series between the external bypass signal input terminal 221 and the second control terminal of the second controllable switch 232 , and a fourth resistor 239 is electrically connected between the external bypass signal input terminal 221 and the ground terminal 234 .

The bus input terminal 211 is a pin of the bus input interface 21, each bus input terminal 211 receives a bus signal of the bus unit 1, the external bypass signal input terminal 221 is a pin of the external bypass signal input interface 22, an external bypass signal The channel signal input terminal 221 receives an external I/O signal input by the customer optional device 6 through the external bypass signal input interface 22 .

The interlocking unit 2 includes a casing 24 , and the external bypass signal input interface 22 is fixed on the front wall 241 of the casing 24 , and the fixing method can adopt various existing fixing methods, including but not limited to welding, bolt connection and the like. The external bypass signal input interface 22 is preferably a multi-pin D-SUB interface. The bus input interface 21 is fixed on the first side wall 242 of the housing 24, and the fixing method can adopt various existing fixing methods, including but not limited to welding, bolt connection and the like. The first side wall 242 faces the direction of the bus unit 1, and the side where the first side wall 242 is located is the bus unit side. The second side wall 243 of the housing 24 faces the valve island 3 , and the side where the second side wall 243 is located is the valve island side. The second side wall 243 is provided with a through hole 244 , and the interlock circuit output end 233 of the interlock circuit 23 is electrically connected to the solenoid valve control end through the through hole 244 . The output terminal 233 of the interlock circuit can be electrically connected to the control terminal of the solenoid valve through a wire passing through the through hole 244 .

The safety valve island in this embodiment is based on a modular design, and can flexibly correspond to various field bus communication protocols and the number of solenoid valve points, such as 32-bit solenoid valve points. In this embodiment, the actual state of the valve island is double managed by the bus and external I/O signals, which increases the safety conditions for its operation and reduces the probability of dangerous actions of the equipment caused by risk factors such as electromagnetic interference and misoperation.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

Claims (8)

1. A safety valve island, characterized in that it comprises: a bus unit (1), an interlocking unit (2) and a valve island (3), wherein the interlocking unit (2) is provided with a bus input interface (21), An external bypass signal input interface (22), the bus input interface (21) is electrically connected to the bus unit (1), and the bus input interface (21) and the external bypass signal input interface (22) are interconnected After being locked, it is electrically connected to the solenoid valve control end of the valve island (3). 2. The safety valve island according to claim 1, wherein the bus input interface (21) comprises a plurality of bus input terminals (211), and each of the external bypass signal input interfaces (22) comprises a plurality of bus input terminals (211) external bypass signal input terminals (221), the valve island (3) includes a plurality of the solenoid valve control terminals, each of the bus input terminals (211) and an external bypass signal input terminal (221) ) is electrically connected to a control end of the solenoid valve after being interlocked. 3. The safety valve island according to claim 2, wherein the interlocking unit (2) further comprises a plurality of interlocking circuits (23), each of the interlocking circuits (23) comprising a first a control switch (231), a second controllable switch (232), an interlock circuit output terminal (233), and a ground terminal (234); The first input end of the first controllable switch (231) is electrically connected to a bus input terminal (211), and the first output end of the first controllable switch (231) is output from the interlock circuit The terminal (233) is electrically connected, and the output terminal (233) of the interlock circuit is electrically connected to a control terminal of the solenoid valve; The bus input terminal (211) is also electrically connected to the second input end of the second controllable switch (232) through a first voltage dividing resistor (235) and a second voltage dividing resistor (236). The second output terminal of the controllable switch (232) is electrically connected to the ground terminal (234), and the connection point of the first voltage dividing resistor (235) and the second voltage dividing resistor (236) is connected to the first voltage dividing resistor (236). The first control terminal of the control switch (231) is electrically connected, and the external bypass signal input terminal (221) is electrically connected to the second control terminal of the second controllable switch (232). 4. The safety valve island according to claim 3, wherein the first controllable switch (231) is a first triode, and the second controllable switch (232) is a second triode ; The first input terminal is the collector of the first triode, the first output terminal is the emitter of the first triode, and the first control terminal is the first triode or the first input terminal is the emitter of the first triode, the first output terminal is the collector of the first triode, and the first control terminal is the the base of the first triode; The second input terminal is the collector of the second triode, the second output terminal is the emitter of the second triode, and the second control terminal is the second triode or the second input terminal is the emitter of the second triode, the second output terminal is the collector of the second triode, and the second control terminal is the The base of the second triode. 5 . The safety valve island according to claim 3 , wherein the interlock circuit ( 23 ) further comprises a diode ( 237 ), and the anode of the diode ( 237 ) is electrically connected to the ground terminal ( 234 ). 6 . , the cathode of the diode (237) is electrically connected to the output terminal (233) of the interlock circuit. 6. The safety valve island according to claim 3, wherein the interlocking unit (2) further comprises a housing (24), and the interlocking circuit (23) is accommodated in the housing (24) , the bus input interface (21) and the external bypass signal input interface (22) are respectively fixed on the surface of the casing (24). 7. The safety valve island according to claim 6, wherein the housing (24) comprises a front wall (241) and a first side wall (242), and the bus input interface (21) is fixed on the On the first side wall (242), the external bypass signal input interface (22) is fixed on the front wall (241). 8. The safety valve island according to claim 7, wherein the housing (24) further comprises a second side wall (243) away from the first side wall (242), the second side wall (243) is provided with a through hole (244), and the interlock circuit output end (233) of the interlock circuit (23) is electrically connected to the solenoid valve control end through the through hole (244).

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