CN209962104U

CN209962104U - Pre-processor for tank

Info

Publication number: CN209962104U
Application number: CN201920963488.6U
Authority: CN
Inventors: 杨孟源
Original assignee: Nanjing Mengyuan Automation Equipment Co Ltd
Current assignee: Nanjing Mengyuan Automation Equipment Co Ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-01-17
Anticipated expiration: 2029-06-25

Abstract

The utility model provides a tank preprocessor, which comprises an explosion-proof shell, a display module, a power module and an acquisition module, wherein the power module is respectively connected with the display module and the acquisition module; the acquisition module comprises a control circuit and a communication circuit, the control circuit comprises a first control chip, a first storage chip, a watchdog, a first digital potentiometer, a first triode, a first voltage stabilizer and a first DC-DC converter, the first storage chip is connected with the communication circuit, and the voltage output end of the first voltage stabilizer is connected with the display module; the communication circuit comprises a first photoelectric coupler and a communication chip, the first photoelectric coupler is respectively connected with a first control chip and the communication chip, and the communication chip is further connected with external equipment, such as a liquid level meter and a differential pressure transmitter. The utility model discloses jar preprocessor hardware simple structure, the circuit is easily built, and the signal of each sensor of collection that can be quick shows oil tank data, has stronger security and reliability.

Description

Pre-processor for tank

Technical Field

The utility model relates to a jar preprocessor belongs to oil tank automatic metering technical field.

Background

At first, the petrochemical industry such as oil depots measures the oil quantity stored in a storage tank in a manual sampling and manual calculation mode, along with the development of computer technology, an oil quantity automatic calculation system based on a computer system is developed, a manual metering method is gradually replaced, and the automation degree and the operation efficiency of the oil depots are greatly improved.

The pre-tank processor is an important component of the automatic oil quantity calculating system, and is mainly used for collecting signals acquired by the sensor equipment, calculating and processing acquired data signals, locally displaying acquired data and calculated data and transmitting the data to the upper computer/central controller. At present, the design of the tank pre-processor is relatively perfect, but the reliability, the communication speed and the like of the tank pre-processor are still required to be further improved.

Disclosure of Invention

In order to further improve jar preprocessor's security, reliability, the utility model provides a jar preprocessor sets up a plurality of memory chip in jar preprocessor's circuit, the data signal that real-time storage level gauge and differential pressure transmitter gathered avoids the system fault to lead to data loss, and multichannel communication circuit mutual isolation each other guarantees the security and the stability of communication, has still set up this ampere of circuit in the treater, has further improved jar preprocessor's security and reliability.

In order to solve the technical problem, the utility model discloses a following technical means:

the utility model provides a jar preprocessor, mainly includes explosion-proof shell, display module, power module and collection module, display module inlays explosion-proof shell surface, power module and collection module fixed mounting are in inside the explosion-proof shell, power module connects respectively display module and collection module.

The acquisition module comprises a control circuit and a communication circuit, the control circuit comprises a first control chip, a first storage chip, a watchdog, a first digital potentiometer, a first triode, a first voltage stabilizer and a first DC-DC converter, the watchdog is connected in parallel at two ends of the first control chip, the first control chip is respectively connected with one end of the first storage chip and one end of the first digital potentiometer, the other end of the first storage chip is connected with the communication circuit, the other end of the first digital potentiometer is respectively connected with a base electrode and a collector electrode of the first triode, an emitter electrode of the first triode is connected with an ADJ interface of the first voltage stabilizer, a voltage output end of the first voltage stabilizer is connected with the display module, and the first DC-DC converter is connected in parallel at a voltage input end and a voltage output end of the first voltage stabilizer.

Communication circuit includes first phase inverter, first optoelectronic coupler, second optoelectronic coupler and communication chip, first control chip is connected to the one end of first phase inverter, and the other end of first phase inverter is connected the one end of first optoelectronic coupler, the other end of first optoelectronic coupler are connected the one end of communication chip, the one end of second optoelectronic coupler is connected first storage chip, the one end of communication chip is connected to the other end of second optoelectronic coupler, and external equipment is connected to the other end of communication chip, wherein, external equipment includes level gauge and differential pressure transmitter.

Furthermore, the tank pretreatment device also comprises a card reading module and a keyboard, and the card reading module and the keyboard are embedded on the surface of the explosion-proof shell.

Furthermore, the explosion-proof shell comprises a box cover and a box body, the display module, the card reading module and the keyboard are embedded on the box cover, and a cable interface is arranged at the bottom of the box body.

Further, the collection module still includes this ampere of circuit, this ampere of circuit includes third optoelectronic coupler, first isolation power, first fuse and second control chip, the one end of third optoelectronic coupler is connected first control chip, and the other end of third optoelectronic coupler is connected the VDD pin of second control chip, the voltage input end of first isolation power connects 5V voltage, and the voltage output end of first isolation power connects the one end of first fuse, the other end of first fuse connect the other end of third optoelectronic coupler, and the VSS pin of second control chip is connected to the VO pin of first isolation power, and second control chip still connects through binding post the keyboard.

Furthermore, the acquisition module further comprises a clock circuit, the clock circuit comprises a clock chip, and a power supply pin of the clock chip is connected with a 5V power supply through a diode.

Furthermore, the power module comprises a second voltage stabilizer, a first DC-DC power module, a first capacitor and a second capacitor, wherein the voltage input end of the second voltage stabilizer is connected with 12V voltage, the voltage output end of the second voltage stabilizer outputs 5V voltage, the grounding end of the second voltage stabilizer is grounded, the first capacitor is connected in parallel with the voltage input end and the grounding end of the second voltage stabilizer, the second capacitor is connected in parallel with the voltage output end and the grounding end of the second voltage stabilizer, one end of the first DC-DC power module is respectively connected with the voltage input end and the grounding end of the second voltage stabilizer, and the other end of the first DC-DC power module is connected with 5V voltage.

Further, the communication chip selects an RS485 communication chip, and TVS diodes are connected in parallel on the line A and the line B of the RS485 communication chip.

Further, the display module adopts an LED liquid crystal display screen.

Further, the keyboard is a 23-key keyboard, and keys of the 23-key keyboard are customized thin film keys.

Furthermore, the box cover and the box body are fixedly connected through bolts and sealing gaskets matched with the bolts.

The following advantages can be obtained by adopting the technical means:

the utility model provides a treater before jar, treater have explosion-proof shell, install power module and collection module in the explosion-proof shell, the display is connected through a digital potentiometer to first control chip among the collection module, conveniently adjusts display luminance, and first control chip is connected with a plurality of memory chip, stores the data signal that different sensors gathered respectively, and when sensor or host computer trouble, data can not be lost, can also obtain in treater before the jar, has improved the reliability of system. Each communication circuit in the tank preprocessor comprises at least one photoelectric coupler and is used for isolating circuit devices and improving the anti-interference performance of the communication circuit, and a TVS diode is connected in the communication circuit and is used for protecting the circuit devices and avoiding circuit overvoltage. The pre-tank processor is provided with a keyboard, data can be input by the keyboard, the keyboard is connected with the first control chip through the intrinsic safety circuit, explosion or fire can not occur even if the circuit fails, and the safety and the reliability of the pre-tank processor are further improved. The utility model discloses jar preprocessor hardware simple structure, the circuit is easily built, and the signal of each sensor of collection that can be quick shows oil tank data, has stronger security and reliability.

Drawings

Fig. 1a is a front view of a tank pre-processor of the present invention.

Fig. 1b is a schematic diagram of the internal structure of a tank pre-processor according to the present invention.

Fig. 2 is a schematic view of the key connection of the keyboard in the pre-tank processor of the present invention.

Fig. 3 is a schematic circuit diagram of a power module according to an embodiment of the present invention.

Fig. 4a is a circuit diagram of the control and storage part in the acquisition module according to the embodiment of the present invention.

Fig. 4b is a circuit diagram of the embodiment of the present invention for adjusting the display brightness in the acquisition module.

Fig. 5 is a schematic circuit diagram of a communication circuit according to an embodiment of the present invention.

Fig. 6 is a schematic circuit diagram of an intrinsically safe circuit according to an embodiment of the present invention.

Fig. 7 is a schematic circuit diagram of a clock circuit according to an embodiment of the present invention.

In the figure, 1 is an explosion-proof shell, 2 is a display module, 3 is a keyboard, 4 is a card reading module, 5 is a power module, 6 is an acquisition module, 7 is a box cover, 8 is a box body, 9 is a bolt, 10 is toughened glass, 11 is epoxy resin glue, and 12 is a cable interface.

Detailed Description

The technical scheme of the utility model is further explained by combining the attached drawings as follows:

a tank preprocessor is mainly composed of an explosion-proof shell 1, a display module 2, a keyboard 3, a card reading module 4, a power supply module 5 and an acquisition module 6, as shown in figures 1a and 1 b. The explosion-proof shell comprises a box cover 7 and a box body 8, the box body and the box cover are made of explosion-proof materials, the box cover and the box body are fixed together through a plurality of bolts 9, each bolt is sealed by a matched sealing washer, the box body and the box cover are tightly combined, the box body and the box cover are insulated and rustproof on a combining surface (an explosion-proof combining surface) of the box body and the box cover, tempered glass 10 is embedded at a position close to the top of the box cover, the joint of the tempered glass and the box cover is sealed by epoxy resin glue 11, the thickness of the glue seal is larger than 0.3mm, a display module is embedded inside the tempered glass, the display module selects a color Chinese character LED (light-emitting diode) liquid crystal display screen, and the display screen can display time, the liquid level in the oil tank. The card reading module adopts an IC card reader, and is arranged at the position close to the lower left corner on the inner side of the box cover. The keyboard is embedded in the position, close to the lower right corner, of the box cover, the keyboard is a 23-key keyboard, the specific connection relation of keys on the keyboard is shown in figure 2, the keys are customized film keys, the sensitivity is high, and the service life is long. The box body and the box cover are connected to form a cavity, the power supply module and the acquisition module are fixedly installed in the cavity, a cable interface 12 is arranged at the bottom of the box body and used for connecting a peripheral power supply and external equipment, such as a liquid level meter, a differential pressure transmitter and the like.

The power module is respectively connected with the display module, the card reading module and the acquisition module, the display module, the card reading module and the acquisition module supply power, the power module mainly comprises a second voltage stabilizer, a first DC-DC power module, a first capacitor and a second capacitor, the voltage input end of the second voltage stabilizer is connected with 12V voltage, the voltage output end of the second voltage stabilizer outputs 5V voltage, the grounding end of the second voltage stabilizer is grounded, the first capacitor is connected in parallel with the voltage input end and the grounding end of the second voltage stabilizer, the second capacitor is connected in parallel with the voltage output end and the grounding end of the second voltage stabilizer, one end of the first DC-DC power module is respectively connected with the voltage input end and the grounding end of the second voltage stabilizer, and the other end of the first DC-DC power module is connected with 5V. Fig. 3 is a circuit diagram of the power supply module in this embodiment, in which the power supply module further includes a connection terminal for connecting a cable interface on the box body or grounding, the second voltage regulator is a 78M05 voltage regulator, two capacitors are connected in parallel between a voltage input terminal and a grounding terminal of the voltage regulator, two capacitors are also connected in parallel between a voltage output terminal and the grounding terminal, and the first DC-DC power supply module is a XZR05 system power supply module.

The acquisition module mainly comprises a control circuit and a communication circuit, the control circuit mainly comprises a first control chip, a first storage chip, a watchdog, a first digital potentiometer, a first triode, a first voltage stabilizer and a first DC-DC converter, the watchdog is connected at two ends of the first control chip in parallel, the first control chip is respectively connected with one end of the first storage chip and one end of the first digital potentiometer, the other end of the first storage chip is connected with the communication circuit, the other end of the first digital potentiometer is respectively connected with a base electrode and a collector electrode of the first triode, an emitter electrode of the first triode is connected with an ADJ interface of the first voltage stabilizer, a voltage output end of the first voltage stabilizer is connected with the display module, and the first DC-DC converter is connected at a voltage input end and a voltage output end of the first voltage stabilizer in parallel. Fig. 4a is a schematic circuit diagram of control, acquisition and storage of the control circuit in this embodiment, fig. 4b is a schematic circuit diagram of the control circuit in this embodiment connecting and adjusting the display brightness of the display module, wherein the first control chip is a W77E58 chip, the first control chip can be connected with a plurality of memory chips for storing different data signals, for example, a 74HC595 chip, a watchdog is an X5045 chip, a first digital potentiometer is an X9313 chip, a first voltage stabilizer is an LM337 linear voltage stabilizer, a first DC-DC converter is an MC34063 chip, and the control circuit is connected with the display module through a connection terminal.

Communication circuit mainly includes first phase inverter, first photoelectric coupler, second photoelectric coupler and communication chip, first control chip is connected to the one end of first phase inverter, the one end of first photoelectric coupler is connected to the other end of first phase inverter, the one end of communication chip is connected to the other end of first photoelectric coupler, first storage chip is connected to the one end of second photoelectric coupler, the one end of communication chip is connected to the other end of second photoelectric coupler, external equipment is connected to the other end of communication chip, external equipment mainly includes level gauge and differential pressure transmitter. Fig. 5 is a schematic circuit diagram of a communication circuit in this embodiment, an RS485 communication chip, with a specific model of MAX485, is selected for the communication chip, and TVS diodes are connected in parallel to the line a and the line B of the communication chip.

The collection module of treater before the jar still includes the ann circuit, the ann circuit mainly includes third optoelectronic coupler, first isolation power, first fuse and second control chip, first control chip is connected to the one end of third optoelectronic coupler, the VDD pin of second control chip is connected to the other end of third optoelectronic coupler, 5V voltage is connected to the voltage input end of first isolation power, the one end of first fuse is connected to the voltage output end of first isolation power, the other end of third optoelectronic coupler is connected to the other end of first fuse, the VSS pin of second control chip is connected to the VO pin of first isolation power, second control chip still connects the keyboard through binding post. Fig. 6 is a schematic circuit diagram of the intrinsically safe circuit in this embodiment, in which the first isolated power supply is B0505D-W5, the second control chip is a W79E824ADG chip, and the W79E824ADG chip is connected to the keyboard keys in sequence through a connection terminal.

The acquisition module further includes a clock circuit for acquiring date and time, a schematic diagram of the clock circuit in this embodiment is shown in fig. 7, a PCF8563 chip is selected as a clock chip in the clock circuit, and a 5V power supply is connected to a power supply pin of the clock chip through a diode.

The utility model discloses the hardware structure of jar pre-processor is simple, has stronger explosion-proof ability, be applicable to environments such as oil depot, the circuit of jar pre-processor is easily built, the cost is not high, the data signal of collection each sensor that acquisition circuit can be quick, and utilize communication circuit to be located the calculation oil body volume to the host computer with the signal transmission who gathers, data such as density, the display module can all be sent to with the data signal who calculates to the signal of gathering, be used for showing oil tank data locally, make things convenient for staff to observe and the record, set up this ampere of circuit and a plurality of device that has the isolation function in the jar pre-processor, whole circuit has stronger security and reliability.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A tank preprocessor is characterized by comprising an explosion-proof shell, a display module, a power supply module and an acquisition module, wherein the display module is embedded on the surface of the explosion-proof shell, and the power supply module and the acquisition module are fixedly arranged in the explosion-proof shell;

the power supply module is respectively connected with the display module and the acquisition module;

the acquisition module comprises a control circuit and a communication circuit, the control circuit comprises a first control chip, a first storage chip, a watchdog, a first digital potentiometer, a first triode, a first voltage stabilizer and a first DC-DC converter, the watchdog is connected at two ends of the first control chip in parallel, the first control chip is respectively connected with one end of the first storage chip and one end of the first digital potentiometer, the other end of the first storage chip is connected with the communication circuit, the other end of the first digital potentiometer is respectively connected with a base electrode and a collector electrode of the first triode, an emitter electrode of the first triode is connected with an ADJ interface of the first voltage stabilizer, a voltage output end of the first voltage stabilizer is connected with the display module, and the first DC-DC converter is connected at a voltage input end and a voltage output end of the first voltage stabilizer in parallel;

2. The pre-processor of claim 1, further comprising a card reading module and a keypad embedded in the explosion proof housing surface.

3. The pre-tank processor of claim 2, wherein the explosion-proof housing comprises a tank cover and a tank body, the display module, the card reading module and the keyboard are embedded on the tank cover, and a cable interface is arranged at the bottom of the tank body.

4. The pre-tank processor according to claim 2, wherein the collection module further comprises an intrinsic safety circuit, the intrinsic safety circuit comprises a third photoelectric coupler, a first isolation power supply, a first fuse and a second control chip, one end of the third photoelectric coupler is connected with the first control chip, the other end of the third photoelectric coupler is connected with a VDD pin of the second control chip, a voltage input end of the first isolation power supply is connected with 5V voltage, a voltage output end of the first isolation power supply is connected with one end of the first fuse, the other end of the first fuse is connected with the other end of the third photoelectric coupler, a VO pin of the first isolation power supply is connected with a VSS pin of the second control chip, and the second control chip is further connected with the keyboard through a wiring terminal.

5. The pre-tank processor as claimed in claim 1, wherein the acquisition module further comprises a clock circuit, the clock circuit comprises a clock chip, and a power supply pin of the clock chip is connected to a 5V power supply through a diode.

6. The pre-tank processor of claim 1, wherein the power module comprises a second voltage stabilizer, a first DC-DC power module, a first capacitor and a second capacitor, a voltage input end of the second voltage stabilizer is connected with 12V voltage, a voltage output end of the second voltage stabilizer outputs 5V voltage, a grounding end of the second voltage stabilizer is grounded, the first capacitor is connected in parallel with the voltage input end and the grounding end of the second voltage stabilizer, the second capacitor is connected in parallel with the voltage output end and the grounding end of the second voltage stabilizer, one end of the first DC-DC power module is respectively connected with the voltage input end and the grounding end of the second voltage stabilizer, and the other end of the first DC-DC power module is connected with 5V voltage.

7. The pre-tank processor as claimed in claim 1, wherein the communication chip is an RS485 communication chip, and TVS diodes are connected in parallel to the a line and the B line of the RS485 communication chip.

8. The pre-tank processor of claim 1, wherein the display module is an LED lcd.

9. The pre-tank processor of claim 2, wherein the keyboard is a 23-key keyboard, and the keys of the 23-key keyboard are customized membrane keys.

10. The pre-treater for tank as recited in claim 3 wherein the cover is fixedly attached to the tank by bolts and sealing washers associated with the bolts.