KR820000218B1 - Control circuit for batcher plant - Google Patents

Abstract

This invention relates to the control circuit for the batcher plant which is available in mixing the materials cement, sands, pebbles and water in order to get concrete compounds. The circuit comprises material injection volume control part(3) which is composed of injection quantity determination circuit, comparator, injection quantity error complement circuit and adder, mixed materials output control part(4), injection indication control part, compounds output indication control part and mixed material empty display part for informing that the volume of the compounds remains empty.

Description

Injection Output Control Circuit of Concrete Mixer Batcher Plant

1 is a schematic diagram of the present invention.

2 is a circuit diagram of the injection, export command and relay drive unit and the capacity display unit of the present invention.

3 is a circuit diagram of a load cell amplifier unit and an A / D converter of the present invention.

4 is a circuit diagram of a memory circuit portion of the present invention.

5 is a circuit diagram of an injection rate setting control unit of the present invention.

6 is a circuit diagram of a carrying amount setting control unit of the present invention.

The present invention relates to an injection and discharge amount control circuit of a batch mixing plant for concrete mixing, the present invention is to inject a sample for mixing concrete (hereinafter abbreviated as a sample) such as cement, gravel, sand and water into the metering hopper of the batcher plant, If the sample volume to be injected is set arbitrarily with a digital switch, and the injection instruction switch is operated, the injection device is operated only when the amount injected is smaller than the amount already injected into the weighing hopper. The relay operates to inject the sample, thereby continuously improving the amount of sample injected into the weighing hopper as a load cell amplifier. When the injection set amount and the injection amount coincide, the injection device driving relay is controlled to stop the sample injection. When the amount of injection is higher than the simultaneous injection set amount, Even if the switch is operated, the injection device driving relay does not operate so that the injection is prohibited, so that the injection status and the injection amount can be easily checked in the weighing hopper. Also, if the discharge amount is set by the digital switch as above, First, it is possible to take out only when the amount of injection is equal to or larger than the amount injected in the weighing hopper. If the amount of injection is less than the amount of taking out, it is impossible to take out the sample by the predetermined set amount. The empty display indicates the state that cannot be taken out to the outside, and even if the export instruction switch is operated, the export device is not operated and the export is prohibited. Make sure However, when the amount of injection currently injected into the weighing hopper is greater than the set value for carrying out, it becomes possible to carry out the state. If the switch is operated according to this signal, the carrying device relay operates to operate the carrying out device and simultaneously carry out the carrying amount. The counting is continued until the counting amount and the setting amount of the export are consistent, and when the matching is performed, the relay for controlling the export device is controlled so that the export is stopped. The purpose of this study is to accurately grasp the amount of discharge and to improve the working efficiency.

In the conventional batcher plant, most of them adopt the method of controlling the injection amount and the discharge amount of the sample by the mechanical method, which is due to the mechanical configuration, which is complicated and difficult to manufacture or install, and the discharge amount by the mechanical control method. In addition, since the injection amount is controlled, it is impossible to set the ejection amount or the injection amount accurately, so that not only the error of the set value is large, but also the failure rate is very high, which is very uneconomical in terms of operation and maintenance.

In order to solve the above-mentioned defects, the present invention can precisely adjust the amount of injection and discharge, remove the measurement error, and quantify the amount of work. It can be performed quickly to improve the workability of the batcher print for mixing concrete concretely described in detail by the accompanying drawings as follows.

1 shows the overall schematic diagram of the present invention. The present invention relates to a load cell amplifier unit 1, an A / D converter and a BCD converter 2, an injection amount setting controller 3, a discharge amount setting controller 4, and a load cell amplifier unit. (1) a memory circuit 5 for storing the measured value of the memory, an injection command control unit 6, a memory command control unit 8 for controlling the export command control unit 7 and the memory circuit 5, and an injection command control unit 6 And the injection device drive relay unit 9 controlled by the injection setting controller 3 and the discharge device drive relay unit 10 controlled by the discharge instruction control unit 7 and the discharge amount control unit 4 It is composed of a volume display section 11 to be displayed, and 12 and 13 are injection totalizers and re-bridge display sections.

The load cell amplifier unit (1) installed in the improved hopper constitutes a zero adjustment volume for correcting the load of the weighing hopper (not shown), a circuit for adjusting the span, and the measured amount (cal) so that water, sand, cement and gravel, etc. Weigh the sample load.

In the A / D converter and the BCD converter 2, the analog signal measured by the load cell amplifier unit 1 is converted into a BCD signal and supplied to each circuit. The injection amount setting control unit 3 is composed of an injection amount setting circuit 14, a comparison circuit 15, an injection rate error compensating circuit 16, and an addition circuit 17 for setting an injection amount with a digital switch. The addition amount signal and the correction signal set by the injection rate error compensating circuit 16 are added by the addition circuit 17, and the comparator circuit 15 compares the injection setting signal with the injection amount signal so that the injection completion signal is sent out. The injection completion signal c is sent to the injection instruction control unit 6 described later.

The carry amount setting control section 4 is composed of a carry amount setting circuit 18, a comparison circuit 19, a carry amount error compensating circuit 20, an addition circuit 21, and a subtraction circuit 22 for arbitrarily setting a carry amount of the digital switch. To compare the carry-out amount setting signal in the carry-out amount setting circuit 18 and the correction signal of the carry-out error compensation circuit 20 by the addition circuit 21 in the comparison circuit 19 to carry out the carry-out signal later described. The instruction is sent to the instruction controller 7.

The memory section 5 stores the weighing signal measured by the load cell amplifier unit 1 of the weighing hopper, and the memory section 5 is set or reset by the memory circuit control section 8.

출력단을 AND회로(25)의 일측 입력단자에 접속 연결하며, AND회로(25 )의 타측 입력단에는 주입량 설정제어부(3)의 비교회로(15)의 주입 완료신호가 OR회로(26)의 출력단을 인버터(27)을 통하여 입력되게 하고, OR회로(26)의 출력을 SR플립플롭(24)의 R셋트에 입력시켜주고, 주입지시 스위치(SW₁)에 메모리 회로제어부The injection instruction control section 6 is connected to the S terminal of the SR flip-flop 24 through the differential circuit 23 to the injection instruction switch SW ₁ as shown in FIGS.

The output terminal is connected to one input terminal of the AND circuit 25, and the injection completion signal of the comparison circuit 15 of the injection amount setting controller 3 is connected to the input terminal of the AND circuit 25 to the output terminal of the OR circuit 26. Input through the inverter 27, the output of the OR circuit 26 is input to the R set of the SR flip-flop 24, and the memory circuit control unit to the injection command switch (SW ₁ )

출력단을 AND회로(30)의 일측입력단에 접속하며 AND회로(30)의 타측 입력단에는 반출량설정제어부(4)의 비교회로(19)의 반출완료 신호가 입력되는 OR회로(31)의 출력측에 인버터(32)를 연결시켜 접속하며, OR회로(31)의 출력단을 SR플립플롭(29)출력은 메모리회로 제어부(8)에 입력되게 구성하며 AND회로(30)의 출력단에는 반출장치 구동용 릴레이부(10)를 접속연결한다. 메모리회로제어부(8)은 반출지시스위치(SW₁)의 출력과 OR회로(31)의 출력을 OR회로(33)으로 조합하여 입력시켜주고 OR회로(35)의 출력단에 미분회로(34)를 통하여 RS플립플롭(35)의 S단자를 접속하고 이의

출력단에 버퍼(36)을 통하여 메모리부(5)의 입력되게 구성한다.It is sent out to (8), and the injector drive relay unit 9 described later is connected to the output side of the AND circuit 25. The carrying amount instruction control unit 7 is connected to the S terminal of the SR flip-flop 29 through the differential circuit 28 to the carrying instruction switch SW ₂ .

The output terminal is connected to one input terminal of the AND circuit 30, and the other input terminal of the AND circuit 30 is connected to the output side of the OR circuit 31 to which the completion signal of the comparison circuit 19 of the discharge amount setting controller 4 is input. (32) are connected and connected, and the output terminal of the OR circuit 31 is configured so that the SR flip-flop (29) output is input to the memory circuit controller (8), and the output terminal of the AND circuit (30) for the output device driving relay unit Connect (10). The memory circuit control unit 8 inputs the output of the eject instruction switch SW ₁ and the output of the OR circuit 31 into the OR circuit 33 and inputs the differential circuit 34 to the output terminal of the OR circuit 35. Connect the S terminal of the RS flip-flop (35)

The memory unit 5 is configured to be input to the output terminal through the buffer 36.

The capacity display section 11 is composed of a comparison circuit 37 and a relay circuit 38 for carrying out a device lock. In the comparison circuit 37, a weighing signal and a carrying amount setting circuit 18 are provided to the load cell amplifier unit 1 of the weighing hopper. Compared with the carrying amount setting signal of), it operates when the carrying amount setting signal is large and configures the capacity display and the carrying device to brake.

In addition, the injection amount integration metering unit 12 accumulates the total amount measured in the load cell amplifier unit 1 to display the total work amount, and the inventory amount display unit 13 allows the amount remaining in the weighing hopper to be displayed. When explaining the present invention of such a member, divided into the operating state at the time of injection and export as follows.

출력단에는 "H"상태의 신호가 나타나 AND 회로(25)의 그 입력이 모두 "H"상태가 되므로서 그 출력이 "H"가 되어 주입장치 구동용 릴레이부(9)의 릴레이(RY₁)을 동작시켜 계량 흡퍼내에 콘트리트혼합용 시료가 주입됨과 동시 주입지시스위치(SW₁)의 신호는 메모리회로제어부(8)의 OR회로(33)에 입력되어 RS플립플롭(35)의 S단자에 미분회로(25)를 통하여 "H"상태의 신호가 입력되게 되어

출력단에는 "H"상태가 되어 메모리부(5)가 동작하게 되는 것이다.First, when the concrete mixing sample is not stored in the weighing hopper, when the metering value of the load cell amplifier unit 1 is in the "O" state, when the sample for mixing the concrete is injected, the injection amount setting control unit 3 When the required injection amount is set by operating the digital switch of the injection amount setting circuit 14, this injection setting signal is inputted to the comparison circuit 15 so that the weighing signal measured by the load cell amplifier unit 1 and the injection amount error compensation circuit 16 The set compensation signal is added in the addition circuit 17 and compared with the injection measurement signal inputted. In this case, when the injection measurement signal is smaller than the injection setting signal, the injection completion signal from the comparison circuit 15 does not appear and the injection instruction control unit Both input states of the OR circuit 26 in (6) are kept in the "L" state so that the "L" signal is input to the terminal of the RS flip-flop 24, and the "OR" output of the circuit 26 is By butter 27 is inverted to "H" state one input of the AND circuit 25 is in "H" state. In this state, when the operator turns on the injection instruction switch SW ₁ of the injection instruction control unit 6, the "H" signal is input to the S terminal of the RS flip-flop 24 through the differential circuit 23.

At the output terminal, the signal of "H" state appears, and all the inputs of the AND circuit 25 are in the "H" state, and the output thereof becomes "H", so that the relay RY ₁ of the injection unit driving relay unit 9 is driven. The concrete mixing sample is injected into the metering absorber and the signal of the simultaneous injection instruction switch SW ₁ is input to the OR circuit 33 of the memory circuit control unit 8 and differentiated to the S terminal of the RS flip-flop 35. Through the circuit 25, the signal of the "H" state is inputted

At the output end, the state becomes "H" and the memory unit 5 operates.

In this way, when a sample for mixing concrete is injected into the weighing hopper, the measured value in the load cell amplifier unit 1 increases, and this amount of change is stored by the memory unit 5, and the increased weighing signal is sent to the adding circuit 17. When the signal to which the compensation signal of the injection amount error compensation circuit 16 is added is compared with the setting signal in the comparison circuit 15 and becomes equal to or larger than the injection setting signal, the injection completion signal in the " H " state in the comparison circuit 15 is added. Appearing and input to the OR circuit 26 of the injection instruction control section 6, the output of the "H" state appears in the OR circuit 26, this signal is inverted to the "L" state through the inverter 27, the AND circuit The input of (25) becomes "L" state on one side and the output state becomes "L", so that the relay Ry ₁ of the injection device driving relay unit 9 is turned off to stop the injection and simultaneously OR circuit 26, "H" signal is RS flip-flop

출력은 "L" 상태로 변화되게 되는 것이다.Input to R terminal of (24) resets the RS flip-flop (24)

The output will change to the "L" state.

When carrying out the sample for mixing concrete in such a state, if the carrying amount is set in the carrying amount identification circuit 18 composed of the digital switches of the carrying amount setting control unit 4 as described above, the carrying amount setting signal is compared with the comparison circuit (19). ) Is input to the comparison circuit 37 of the air volume display unit 11, and first, when the amount of the carrying amount set is greater than the amount measured and injected into the weighing signal measured in the load cell amplifier unit 1, that is, the measuring hopper, the carrying out of the weighing signal is impossible. In the comparison circuit 37 of the air volume display section 11, the carry-out prohibition signal appears, and the relay Ry ₃ of the air volume display section 38 is operated to lock the dispensing device so that the unloading is prohibited. By operating the control unit 3 will be able to adjust the injection amount.

출력단에서 "H"신호가 나타나게 되고 이 "H"신호는 AND회로(30)에 일측입력단자에 입력되는데 AND회로(30)의 타측에는 비교회로(19)의 비교 신호출력이 반출개시전에는 "L"상인 상태를 유지하고 있어 OR회로(31)의 출력상태가 "L"이나 인버터(32)를 통하여 AND회로(30)에는 "H"상태의 신호가 입력되어 AND회로(30)에는 "H"상태의 출력이 나타나게 되어 반출장치 구동용릴레이부(10)의 릴레이(Ry₂)가 ON동작하여 계량 홉퍼내의 시료를 외부로 반출시키게 되는데, 이때 반출 지시스위치(SW₂)를 ON조작하는 순간 메모리회로제어부(8)의 RS 플립플롭(35)의 R단자에 "H"상태의 신호가 입력되고 S단자에는 "L"신호가 입력되어 RS플립플롭(35)의

출력측에는 "L"상태의 신호가 나타나 메모리부(5)를 셋트시켜 줌으로서 반출전의 계량치를 기억하고 있게 되는 것이다.However, if the weighing signal is larger than the carrying amount setting signal, the relay Ry ₁ of the air volume display unit 11 does not operate to inform that carrying out is possible, and in this state, the carrying out instruction switch of the carrying instruction control unit 7 When SW ₂ ) is operated (ON), an “H” signal is input to the S terminal of the RS flip-flop 29 through the differential circuit 28.

At the output terminal, the "H" signal appears and this "H" signal is input to the AND circuit 30 at one input terminal. On the other side of the AND circuit 30, the comparison signal output of the comparison circuit 19 is "L" before starting to export. &Quot; H " is maintained and the output state of OR circuit 31 is " L " or " H " state is input to AND circuit 30 through AND 32, and " H " The output of the status is displayed and the relay Ry _{2 of the} carrying device driving relay unit 10 is turned on to take out the sample in the weighing hopper to the outside. At this time, the memory of the discharge instruction switch SW ₂ is turned ON. The signal of the "H" state is input to the R terminal of the RS flip-flop 35 of the circuit controller 8, and the "L" signal is input to the S terminal of the RS flip-flop 35.

On the output side, a signal in the "L" state appears, setting the memory unit 5 to store the measured value before carrying out.

출력단에는 "H"상태의 신호가 나타나 메모리부(5)를 리셋트시켜 줌으로서 메모리부(5)는 전상태를 제거하고 로드셀앰프 유니트(1)의 현재 계량치를 다시 기억하게 됨과 동시 RS 플립플롭(29)의 출력을 다시 "L" 상태로 환원되어 다음 반출동작에 대비하게 되는 것이다.When the export is started in this manner, the measured value of the load cell amplifier unit 1 is changed. In the subtraction circuit 22, the amount of the exported value is removed by subtracting the previous measured value and the change value stored in the memory unit 5. A signal appears and this signal is added to the carrying amount compensation signal set in the carrying amount error compensating circuit 20 and the adding circuit 21 to be input to the comparison circuit 19, and the set signal and the carrying out signal set in the carrying amount setting circuit 18 When the coincidence or the export signal is large, the completion command signal of "H " state appears in the comparison circuit 19 and is inputted to the OR circuit 31 of the export instruction control section 7, so that the output of the OR circuit 31 is " H ""is converted to the" H "is inverted to the output of the aND circuit 30 is" L "signal by the inverter 32" is in L "relay of the carry-out device drives the relay unit (10) (Ry ₂₎ Is stopped and output is stopped, and the output of the "H" state of the OR circuit 31 is stopped. Is input to the OR circuit 33 of the memory circuit control unit 8 so that the signal of " H " state is input to the S terminals and the R terminals of the RS flip-flops 29 and 35 through the differential circuit 34. Of RS flip-flop (35)

A signal of "H" state appears at the output terminal to reset the memory unit 5 so that the memory unit 5 removes the entire state and stores the present weighing value of the load cell amplifier unit 1 again and simultaneously RS flip-flop. The output of (29) is reduced back to the "L" state to prepare for the next carrying out operation.

In addition, in the present invention integrated measurement display unit 12, the total injection amount is integrated and the inventory amount remaining in the weighing hopper can be easily identified and read by the inventory amount indicator 13.

As described above, the present invention can control the injection and unloading state by arbitrarily accurately setting the injection amount and discharge amount of the concrete batcher plant, thereby improving the workability of the batcher plant, and the control method is automatically performed by an electronic method. It eliminates the errors of injection and export by the operator's mechanical operation, and it is easy to operate and its service life is remarkably extended, and it has the characteristics to improve the durability of the batcher implant and export device.

Claims (1)

As shown and described above, an injection amount setting control unit comprising an injection amount setting circuit, a comparison circuit, an injection error compensation circuit, and an addition circuit, and a discharge amount setting control unit consisting of a discharge amount setting circuit, a comparison circuit, a discharge amount error compensation circuit, and an addition circuit; Batch print for concrete mixing, characterized in that it consists of an injection instruction control unit capable of carrying out and injecting operation by a signal of the injection discharge setting controller, and an air quantity display unit for displaying the air volume by comparing the injection amount and the discharge amount setting amount. Injection and discharge control circuit.

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