CN201373999Y

CN201373999Y - Fourteen-channel solenoid valve actuator

Info

Publication number: CN201373999Y
Application number: CN200820179389U
Authority: CN
Inventors: 邸云龙
Original assignee: ERDOS LONGSHENG MINING ELECTROMECHANICAL Co Ltd
Current assignee: Baotou syngenetic solar energy equipment Co., Ltd.
Priority date: 2008-12-08
Filing date: 2008-12-08
Publication date: 2009-12-30
Anticipated expiration: 2018-12-08

Abstract

The utility model relates to a fourteen-channel solenoid valve actuator, which consists of a power unit, a data signal-processing unit, a control unit and a protective unit. The solenoid valve actuator has the following characteristics: the power unit is divided into three power supplies, i.e. VCC, VDD and 3V3 which output current to supply power to the whole circuit; the data signal-processing unit consists of a filter circuit, a CPLD, a signal-buffering drive circuit and an output drive circuit; the core of the control part is a singlechip which has three IO interfaces, i.e. RA, RB and RC; wherein RB and RC are connected with the CPLD, and are used to control the operation of the internal gate circuit of the CPLD and receive the feedback signals sent by the CPLD in order to control the operation of the whole circuit. The utility model has the following advantages: the circuit structure is integrated, the number of elements is less, the circuit is simple, the size is small, the weight is light, the fault rate is low, moreover, the circuit has an intelligentized function, and the utility model is applicable to supports except face-end supports.

Description

Ten four-way solenoid valve drivers

One: technical field

The utility model relates to a kind of ten four-way solenoid valve drivers.

Two: background technology

Electromagnetic valve driver is to be used for fully-mechanized mining working surface hydraulic support electrohydraulic control system under the coal mine, and after the serial data signal that bracket controller is sent here advanced computing, processing, amplification, output drove the electronic installation of each function solenoid valve.Electromagnetic valve driver requires under the following environmental baseline can operate as normal :-operating ambient temperature: 5 ℃-60 ℃;-average relative humidity: be no more than 95% (+25 ℃);-have in the Minepit environment of methane and coal dust explosion danger;-do not have in the mine that destroys the corrosive gas that insulate;-allow in the environment that dabbles.Therefore reliability, security performance to electromagnetic valve driver in the use are had relatively high expectations.The weak point that existing electromagnetic valve driver exists mainly is that circuit structure is compact inadequately, all uses the gate circuit discrete component, so electrical equipment quantity is many, circuit is complicated, volume is big, cost is high, failure rate is high.

Three: summary of the invention

The purpose of this utility model provide a kind of circuit structure adopt integrated, number of elements is few, circuit is simple, volume little in light weight, failure rate is low and circuit has intelligentized ten four-way solenoid valve drivers.

The purpose of this utility model realizes in the following manner:

The utility model comprises power unit, data-signal processing section, control section, protection part, it is characterized in that: power unit is imported by a four-core input socket S101 that (1 pin is the+utmost point, 4 pin are-utmost point) electric current, divide three groups of power supply: VCC, VDD, 3V3 output current to provide power supply for integrated circuit; The data-signal processing section is by filtering circuit, CPLD (PLD), the signal damping driving circuit, output driving circuit four parts are formed, 2 pin of the input termination four-core input socket S101 of filtering circuit, 3 pin, the signal input part of output termination CPLD U5, the signal output part of CPLD (programmable logic device) meets buffering drive circuit U10, the U11 input pin, signal damping driving circuit U10, the output pin of U11 connects the control utmost point of the field effect transistor Q1～Q14 of output driving circuit, the drain electrode of the output terminal Q1～Q14 of output driving circuit connects seven accessory power outlet S301～S307, and the signal output of output driving circuit connects the signal input part of CPLD U5; The core of control section is a single-chip microcomputer, it has RA, RB, 3 IO interfaces of RC, wherein two interfaces of RB, RC are connected with CPLD (PLD), be used for controlling the work of CPLD (PLD) interior door circuit, and receive the feedback signal that CPLD (PLD) feeds, control the operation of entire circuit; The circuit design of protection part is two overcurrents, the short-circuit protection of output cathode, negative pole, and the protection part is connected between output driving circuit and the single-chip microcomputer.

The utility model has the advantages that: circuit structure adopts integrated design, number of elements is few, circuit is simple, volume little in light weight, failure rate is low and circuit has intelligent functions, is suitable for other support except that face-end support.

Four: description of drawings

Fig. 1 is circuit structure of the present utility model and principle of work block diagram;

Fig. 2 is the power unit circuit theory diagrams;

Fig. 3 is the filtering circuit schematic diagram;

Fig. 4 is the circuit diagram of PLD CPLD;

Fig. 5 is the circuit theory diagrams of signal damping driving circuit;

Fig. 6 is the circuit theory diagrams of output driving circuit (unit);

Fig. 7 is the circuit diagram of control circuit (single-chip microcomputer and PLD CPLD);

Fig. 8 is the overcurrent of protection part control output end negative pole, the circuit theory diagrams of short-circuit protection;

Fig. 9 is that the protection part is controlled the overcurrent of output cathode OUT COM (output common port), the circuit theory diagrams of short-circuit protection.

Five: embodiment

With reference to accompanying drawing 1, circuit structure of the present utility model can be divided into power supply, four parts are handled, control, protected to data-signal:

1, power unit

Power unit is input as 12V voltage, exports three groups of power supply: VCC, VDD, 3V3 altogether by input socket S101 input (1 pin is+utmost point that 4 pin are-utmost point) circuit:

(1) VCC: for integrated circuit provides power supply.

Output to:

20 pin of A, single-chip microcomputer PIC16F876.

B, signal output driving circuit part resistance R 11, R14, R17, R20, R23, R26, R29, R32, R35, R38, R41, R44, R47, R50 are as the feedback supply voltage.

8 pin of the comparer U18 LT1638 of C, holding circuit part.

(2) VDD: be signal processing U10, U11 (model: 74HC541; Function: 8 bit buffering drivers) provide power supply.

Output to: 20 pin of U10, U11.

(3) 3V3: provide by U16 ZLD0330, aim at CPLD 3.3V is provided power supply.

Output to: 12,25,37,51,63,75,89,100 pin of CPLD XCS05XL.Its circuit theory diagrams are seen accompanying drawing 2.

2, data-signal processing section

(1), bracket controller is input to electromagnetic valve driver with serial data by the four-core socket through stube cable, after the filtering circuit of forming through resistance, electric capacity filters interference noise, enters 7 pin, 8 pin of U5 CPLD (PLD) XCS05XL.After the inner shift register of CPLD (PLD) is converted to parallel data with serial data, 14 bit parallel data are exported by 39,41,43,45,47,54,56,58,60,62,66,68,70,78 pin of CPLD (PLD) respectively, deliver to buffering drive circuit U10, U11 74HC541 cushions driving, deliver to the control utmost point of output driving circuit field effect transistor Q1～Q14 then by U10, U11 output, 3, the 4 pin output of S301～S307.

(2), the data-signal processing section annexation of finishing them by filtering circuit, CPLD, signal damping driving circuit, four parts of output driving circuit is:

A, filtering circuit: input end R2, R6 connect 2 pin, 3 pin of input socket S101.Signal input part 7 pin, 8 pin of output termination CPLDU5.

Signal output part

39,41,43,45,47,54,56,58,60,62,66,68,70,78 pin of B, CPLD (programmable logic device) connect buffering drive circuit U10, U11,2,3,4,5,6,7,8,9 pin.

Output pin

11,12,13,14,15,16,17,18 pin of C, signal damping driving circuit U10, U11 connect the control utmost point of output driving circuit field effect transistor (model is IRFR024) Q1～Q14.

The drain electrode of the output terminal Q1～Q14 of D, output driving circuit connects 3 pin, 4 pin of accessory power outlet S301～S307, and each socket of socket S301～S307 exports 2 the tunnel, totally 14 tunnel outputs.

The circuit theory diagrams of data-signal processing section are seen accompanying drawing 3～accompanying drawing 6.

3, control section

Single-chip microcomputer PIC16F876 is the core of entire circuit control, it has RA, RB, 3 IO interfaces of RC, wherein two interfaces of RB, RC are connected with CPLD (PLD), be used for controlling the work of CPLD (PLD) interior door circuit, and receive the feedback signal that CPLD (PLD) feeds, control the operation of entire circuit.

Be both-way communication between single-chip microcomputer PIC16F876 and the CPLD, concrete annexation is: the RB mouth of single-chip microcomputer PIC16F876: 21 pin～28 pin; The RC mouth: 12 pin～18 pin connect 27,28,29,30,31,32,33,34,35,13,14,15,21,17,18 pin of CPLD XCS05XL respectively.

The circuit theory diagrams of control section are seen accompanying drawing 7.

When electromagnetic valve driver is not received the output order of bracket controller, the output driving circuit of driver does not receive the control signal (above accompanying drawing 6 is example) of input yet, at this moment Q1 controls very low level, not conducting of Q1, and output feedback signal is a high level.When bracket controller provides A1 mouth output order to driver, at this moment the control signal of A1 mouth is by the 41 pin output of CPLD (PLD), enter 3 pin of U1074HC541, after driving, the U10 buffering delivers to the control utmost point of Q1 by the 17 pin output of U10, Q1 conducting output 0V voltage, (OUT COM end is the output common port with OUT COM end, see schematic diagram OUT COM network label) between deliver to the pushing and sliding solenoid valve for 12V voltage through four-core socket S301 (A mouth) and stube cable, the pushing and sliding solenoid valve is moved.At this moment the output feedback end of driver output driving circuit is owing to the clamper of diode D10 becomes 42 pin that low level is delivered to CPLD (PLD).If cause CPLD (PLD) 41 pin that output signal is arranged because signal damping driving circuit U10 or output driving circuit Q1 damage, 42 pin do not have feedback signal; Or CPLD 41 pin do not have output signal; and 42 pin have had feedback; at this moment CPLD (PLD) can send feedback fault interrupt request singal to single-chip microcomputer PIC16F876; single-chip microcomputer is carried out the feedback malfunction routine; send stop instruction to CPLD (PLD) whole driver is quit work, CPLD (PLD) control LED (light emitting diode) sends the feedback indicating fault.

4, protection part

Since the underground hydraulic support frame electrohydraulic control system, four shared power supplys of bracket controller, and power supply is output as 12V/1.5A, therefore the overcurrent of any parts or the work that short circuit all can have influence on other parts.Therefore for making overcurrent, short-circuit protection more reliable, be two overcurrents, the short-circuit protection of output cathode, negative pole with circuit design.

(1) overcurrent of control output end negative pole, short-circuit protection:

See accompanying drawing 8, high level is when Q1 controls very, the Q1 conducting.Because solenoid valve damages or line fault causes Q1 drain electrode, source current to become big, the electric current that flows through R75 simultaneously also becomes big.When the electric current that flows through R75 reaches 900mA; the voltage drop at R75 two ends makes amplifier U18 LT1638 output become high level by low level; send into 3 pin of single-chip microcomputer U1 PIC16F876 through R81; make single-chip microcomputer output overcurrent protection instruction; driver is shut down, CPLD (PLD) driving LED (light emitting diode) output overcurrent, short circuit indication.

The overcurrent of control output end negative pole, the annexation of short-circuit protection circuit are: holding circuit input end R76 connects the test side of over-current detection resistance R 75.Holding circuit output terminal R81 connects 3 pin of single-chip microcomputer U1 PIC16F876.

(2) overcurrent, the short-circuit protection of output cathode OUT COM (output common port):

See accompanying drawing 9; because damage, line fault or the driver malfunction of solenoid valve make OUT COM end shorted to earth; and cause OUT COM to hold the increase of electric current; when the electric current of R94 reaches 900mA; the voltage drop at R94 two ends makes amplifier U18 LT1638 output become high level by low level; send into 2 pin of single-chip microcomputer U1 PIC16F876 through R101, R102; make single-chip microcomputer output overcurrent protection instruction; driver is shut down, CPLD (PLD) driving LED (light emitting diode) output overcurrent, short circuit indication.

The annexation of output cathode overcurrent, short-circuit protection circuit is: input end R95, the R96 of holding circuit be the input end and the test side of joint detection resistance R 94 respectively.The output terminal R102 of holding circuit connects 2 pin of single-chip microcomputer U1 PIC16F876.

Claims

1, a kind of ten four-way solenoid valve drivers comprise power unit, data-signal processing section, control section, protection part, it is characterized in that: power unit is by a four-core input socket S101 input current, is divided into VCC, VDD, three groups of output currents of 3V3 provide power supply for integrated circuit; The data-signal processing section is by filtering circuit, CPLD, the signal damping driving circuit, output driving circuit four parts are formed, 2 pin of the input termination four-core input socket S101 of filtering circuit, 3 pin, the signal input part of output termination CPLD, the signal output part of CPLD meets buffering drive circuit U10, the U11 input pin, signal damping driving circuit U10, the output pin of U11 connects the control utmost point of the field effect transistor Q1～Q14 of output driving circuit, the drain electrode of the output terminal Q1～Q14 of output driving circuit connects seven accessory power outlet S301～S307, and the signal output of output driving circuit connects the signal input part of CPLD U5; The core of control section is a single-chip microcomputer, and it has RA, RB, 3 IO interfaces of RC, and wherein two interfaces of RB, RC are connected with CPLD, are used for controlling the work of CPLD interior door circuit, and receives the feedback signal that CPLD feeds, and controls the operation of entire circuit; The circuit design of protection part is two overcurrents, the short-circuit protection of output cathode, negative pole, and the protection part is connected between output driving circuit and the single-chip microcomputer.