CN201277168Y

CN201277168Y - Automatic stopping apparatus for slush pump at overpressure

Info

Publication number: CN201277168Y
Application number: CNU2009200176268U
Authority: CN
Inventors: 李新; 贺向光; 董红安
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-07
Filing date: 2009-01-07
Publication date: 2009-07-22
Anticipated expiration: 2019-01-07

Abstract

The utility model provides a super-pressure auto stopping pump device of a mud pump, belonging to a device for oilfield production, wherein a pressure sensor and a sensor circuit are electrically connected, the sensor circuit is electrically connected with the input end of an S C M, an electromagnetic valve driving circuit is electrically connected with the output end of the S C M, the electromagnetic valve driving circuit is electrically connected with an electromagnetic valve, an L C D display screen and a warning display circuit are further electrically connected with the output end of the S C M, and a keyboard circuit and a power supply circuit are further electrically connected with the input end of the S C M, and an E E R O M module is electrically connected on the S C M. The auto stopping pump device can control the operation of the electromagnetic valve when pressure in the pump exceeds the preset pressure, closes the electromagnetic valve, and stops the mud pump, thereby increasing the reliability of stopping pump when the mud pump is super-pressure, being able to effectively prevent the accidents caused by overlarge pump pressure in the operation process of the mud pump, and increasing the use safety of the mud pump.

Description

Slurry pump superpressure pump trip device

Technical field

The utility model provides a kind of field produces device, especially a kind of superpressure knock-off block of slurry pump.

Background technique

In the oil drilling production process, need to monitor the pressure of slurry pump, and the pump pressure of restriction slurry pump, must not be too high, to prevent the generation of accident.What existing slurry pump adopted is the protective gear of mechanical shear cut safety pin; its shortcoming is that the reliability of mechanical shear cut safety pin is not high; having surpassed setting pressure in pump pressure does not often also disconnect in a lot; manually termination of pumping; or under the situation that does not reach design pressure, disconnect suddenly, the Security of use is low.

Summary of the invention

Problem to be solved in the utility model is to provide a kind of slurry pump superpressure pump trip device, the reliability of termination of pumping during with raising slurry pump superpressure.

The utility model is to realize like this, slurry pump superpressure pump trip device, it has pressure transducer and sensor circuit to be electrically connected, sensor circuit is connected electrically on the single-chip microcomputer input end, be electrically connected with driving circuit for electromagnetic valve on the output terminal of single-chip microcomputer, driving circuit for electromagnetic valve and solenoid valve are electrically connected, also be electrically connected with LCD display and alarm indication circuit on the output terminal of single-chip microcomputer, also be electrically connected with keyboard circuit and power circuit on the input end of single-chip microcomputer, the EEROM module is connected electrically on the single-chip microcomputer.

Adopt the slurry pump superpressure pump trip device of said structure, may command solenoid valve action when the pump internal pressure surpasses setting pressure, make closed electromagnetic valve, slurry pump does not rerun, thereby the reliability of termination of pumping when having improved the slurry pump superpressure, can prevent the accident that causes because of pump pressure is excessive in the slurry pump operation process effectively, improve the Security that slurry pump uses.

Description of drawings

Fig. 1 is the functional-block diagram of the utility model structure.

Embodiment

The embodiment who provides below in conjunction with accompanying drawing illustrates concrete structure of the present utility model and working principle.

As shown in the figure, the slurry pump superpressure pump trip device of the utility model, it has pressure transducer 1 and sensor circuit 2 to be electrically connected, sensor circuit is connected electrically on single-chip microcomputer 3 input ends, be electrically connected with driving circuit for electromagnetic valve 6 on the output terminal of single-chip microcomputer, driving circuit for electromagnetic valve and solenoid valve 7 are electrically connected, also be electrically connected with LCD display 4 and alarm indication circuit 5 on the output terminal of single-chip microcomputer, also be electrically connected with keyboard circuit 9 and power circuit 8 on the input end of single-chip microcomputer, EEROM module 10 is connected electrically on the single-chip microcomputer.

During use, pressure transducer is passed in the cavity that pump case is installed in slurry pump, solenoid valve is installed on the oil supply pipeline of the motor on the slurry pump.Pressure in the slurry pump converts electrical signal to through pressure transducer, sensor circuit, and this electrical signal is delivered to single-chip microcomputer, and single-chip microcomputer monitors the pressure of slurry pump, and shows by LCD display.When pressure surpassed setting value, single-chip microcomputer output control signals to solenoid valve through driving circuit for electromagnetic valve 6, and closed electromagnetic valve shuts down after the fuel feeding of motor is cut off, and slurry pump also shuts down thereupon, reaches the purpose of termination of pumping.When pressure surpassed setting value, the alarm indication circuit was also worked, and sent sound, visual alarm.

The model of described single-chip microcomputer can be AT89C52.The model of described EEROM module can be X25045, and the EEROM module is used to preserve the parameters such as pump internal pressure CLV ceiling limit value of setting.Sensor circuit 2, driving circuit for electromagnetic valve 6, LCD display 4, alarm indication circuit 5, keyboard circuit 9 and power circuit 8 etc. are prior art, its concrete structure and working principle are with existing identical, no longer describe in detail, those skilled in the art can select for use according to the needs of the knock-off block of the utility model.Power circuit is single-chip microcomputer and other circuit supplies.Pressure transducer can adopt strain gauge as the pressurized sensing element.

Claims

1, slurry pump superpressure pump trip device, it is characterized in that, it has pressure transducer (1) and sensor circuit (2) to be electrically connected, sensor circuit is connected electrically on single-chip microcomputer (3) input end, be electrically connected with driving circuit for electromagnetic valve (6) on the output terminal of single-chip microcomputer, driving circuit for electromagnetic valve and solenoid valve (7) are electrically connected, also be electrically connected with LCD display (4) and alarm indication circuit (5) on the output terminal of single-chip microcomputer, also be electrically connected with keyboard circuit (9) and power circuit (8) on the input end of single-chip microcomputer, EEROM module (10) is connected electrically on the single-chip microcomputer.