CN2170530Y

CN2170530Y - Electrostatic testing alarm for oil

Info

Publication number: CN2170530Y
Application number: CN 93229461
Authority: CN
Inventors: 何明俊
Original assignee: SAFETY TECHNIQUE INST OF CHINA PETROCHEMICAL GENERAL CORP
Current assignee: SAFETY TECHNIQUE INST OF CHINA PETROCHEMICAL GENERAL CORP
Priority date: 1993-10-12
Filing date: 1993-10-12
Publication date: 1994-06-29
Anticipated expiration: 2003-10-12

Abstract

The utility model relates to an electrostatic testing alarm for oil. The electrostatic testing alarm for oil is composed of a sensor and a portable tester. One end of the sensor is inserted in an oil delivery pipeline for collecting the quantity of electric charge in oil. The portable tester is used for testing the quantity of electric charge of oil collected by the sensor. When the quantity of electric charge of oil exceeds the safety quantity of electric charge, the utility model can give an alarm. The utility model has the advantages of simple structure, convenience, practicability and high testing precision. The utility model is especially suitable for being used on site. The safety can be ensured, and simultaneously the delivery efficiency is enhanced.

Description

Electrostatic testing alarm for oil

The utility model relates to a kind of electrostatic charge of oil detection alarm instrument.

The light fuel major part all is the easy charged medium of high insulation, in the canned conveying operation of containers such as tank car, basin, gathers electric charge and discharge easily.When oil product is used pumping through flow device, can produce and keep a large amount of electric charges in a long time, when charged oil product is stored in the oil tank, electric charge just accumulates in oil product, if the quantity of electric charge runs up to enough when big, will cause spark discharge, the while might cause catches fire and explodes.The explosion accident of oil article vehicle static all once repeatedly took place in countries in the world.

For the electrostatic safety in guaranteeing to store and transport, traditional countermeasure is the flow velocity of restriction oil product, technology such as the antistatic agent and the static device that disappears have also appearred in nearly two, 30 years, but finally still can not eliminate the existence of static, and also all once occur in the regulation boundary, taking place the example of static blast both at home and abroad.This just illustrates that limited flow rate is not the Main physical amount of decision electrostatic safety, and the essence of decision electrostatic safety then is the carried charge of oil product, i.e. electric density.Most countries agrees that all 30 μ c/m are rational control limits at present.Some countries have also developed some and have detected the method and the instrument of the oil product quantity of electric charge in view of the above.This wherein more typically has three kinds.The one, utilize the vane electrode to modulate the method that detects of induced signal, it is to utilize the vane electrode cycle screen of ground connection to cover induction electrode, makes the induced signal of the upright electrode of arc outer periodically defeated, thereby reaches the purpose of the quantity of electric charge in quantitative description one constant volume.The method is in 300 μ c/m ranges, and error has only+10 μ c/m, but Spiralism type sensor construction complexity, and need constant speed motor to drive, be unfavorable for long-term continuous coverage; The 2nd, measure the method that detects that arc founds electrode potential, it is to utilize the charging potential and the electric density in the specific environment of the upright electrode of arc to keep the principle of certain correlativity to measure; The 3rd, measure the methods that detect single or two series connection Faraday cylinder leakage currents, it is to utilize the remittance leakage current of Faraday cylinder and the volume flow rate of liquid.The common drawback of the two kinds of methods in back is complex structures, and is unsuitable for on-the-spot the use.

It is a kind of simple in structure, easy for operation that the purpose of this utility model is to provide, and can send the electrostatic charge of oil detection alarm instrument of warning when the oil product quantity of electric charge surpasses the safe charge amount.

The utility model is made up of sensor and portable type measuring device, it is characterized in that: sensor is by one section Trunk Line 7, two ends are spherical metal electrode 5, insulating support 4, electrode tip holder 3, insulation spacer 2, compositions such as base 1 and cover cap 6, the tube wall place opens a circular hole in the upper end of Trunk Line 7, base 1 is inserted in the circular hole of Trunk Line 7 and is fixed on the Trunk Line 7, insulation spacer 2 places the upper edge of base 1, electrode tip holder 3 is inserted in the base 1, metal electrode 5 is fixed on the insulating support 4, inject then in the electrode tip holder 3, make the pommel of the metal electrode 5 in the pipeline be positioned at the center of pipe, cover cap 6 places on the base 1;

The portable type measuring device by probe 10, shell 13, digital indicator 11, control circuit board 14, power supply 15, power switch 9, one group measure selector switch 8 and alarm 12 etc. and form; Probe 10 is installed in a side of shell 13 upper ends, it is made up of metal inner electrode 17, metal external electrode 18, insulation rod 19 and socket 16, one end of metal inner electrode 17 is inserted in the inside of insulation rod 19, and metal external electrode 18 is enclosed within the outside of insulation rod 19, and insulation rod 19 is inserted on the socket 16; Power supply 15 and control circuit board 14 are installed on the base plate of shell 13, and power switch 9 and one group of measurement selector switch 8 are installed on the side plate of shell 13, and digital indicator 11 and alarm 12 are installed on the upper plate of shell 13.

Control circuit board 14 is made up of amplifying circuit, control circuit, display circuit and warning circuit.

Insulating support 4 and insulation rod 19 all adopt the polytetrafluoroethylene material to make.

Advantage of the present utility model is simple in structure, and is convenient and practical, is particularly suited for on-the-spot the use, the measuring accuracy height has satisfied the on-line monitoring needs of oil article vehicle, shipment pipeline electrostatic charge density, can rationally improve the transport capacity of oil product, under the premise that security is guaranteed, improved transfer efficiency.

Description of drawings:

Fig. 1 is the front view of sensor;

Fig. 2 is the front view of portable type measuring device;

Fig. 3 is the side view of portable type measuring device;

Fig. 4 is the front view of probe.

Describe the utility model in detail below in conjunction with accompanying drawing.

Sensor is spherical metal electrode 5, insulating support 4, electrode tip holder 3, insulation spacer 2, base 1 and cover cap 6 etc. by one section Trunk Line 7, two ends and forms.The tube wall place opens a circular hole in the upper end of Trunk Line 7, base 1 is inserted in the circular hole of Trunk Line 7 and is fixed on the Trunk Line 7, insulation spacer 2 places the upper edge of base 1, electrode tip holder 3 is inserted in the base 1, metal electrode 5 is fixed on the insulating support 4, inject then in the electrode tip holder 3, make the pommel of the metal electrode 5 in the pipeline be positioned at the center of pipe, cover cap 6 places on the base 1.

The portable type measuring device by probe 10, shell 13, digital indicator 11, control circuit board 14, power supply 15, power switch 9, one group measure selector switch 8 and alarm etc. and form, probe 10 is installed in a side of shell 13 upper ends, it is made up of the metal lightning utmost point 17, metal external electrode 18, insulation rod 19 and socket 16, one end of metal inner electrode 17 is inserted in the inside of insulation rod 19, metal external electrode 18 is enclosed within the outside of insulation rod 19, and insulation rod 19 is inserted on the socket 16; Power supply 15 and control circuit board 14 are installed on the base plate of shell 13, power switch 9 and one group of measurement selector switch 8 are installed on the side plate of shell 13, digital indicator 11 and alarm 12 are installed on the upper plate of shell 13, and control circuit board 14 is made up of amplifying circuit, control circuit, display circuit and warning circuit.Detect the charge signal of sensor by probe, send into amplifying circuit and carry out the ratio adjustment, the one tunnel send into display circuit and show measured value then, warning circuit is sent on another road.Control circuit automatically locks signal for numeral shows to provide.

For making electrostatic charge of oil detection alarm instrument reach high-insulation, insulating support 4 and insulation rod 19 all adopt the polytetrafluoroethylene material to make.

The following describes using method of the present utility model.

During measurement, at first sensor string is connected in the pipeline road with flange, take off cover cap, open the power switch of portable type measuring device, the ground connection of will popping one's head in earlier, release the probe on residual charge, will pop one's head in then contacts with sensor metal bar electrode, then the shown counting of digital indicator promptly is the entrained charge density value of tested oil product.When electric density during greater than the safe charge amount, alarm just sends alerting signal.

The utility model has the advantage of simple in structurely, convenient and practical, be particularly suited for on-the-spot the use, the certainty of measurement height has satisfied the on-line monitoring needs of oil article vehicle, shipment pipeline electrostatic charge density, can rationally improve the conveying capacity of oil product, under the premise that security is guaranteed, improved transfer efficiency.

Claims

1, a kind of electrostatic charge of oil detection alarm instrument, it is made up of sensor and portable type measuring device, it is characterized in that: sensor is by one section Trunk Line [7], two ends are spherical metal electrode [5], insulating support [4], electrode tip holder [3], insulation spacer [2], base [1] and cover cap compositions such as [6], tube wall place, upper end at Trunk Line [7] opens a circular hole, base [1] is inserted in the circular hole of Trunk Line [7] and is fixed on the Trunk Line [7], insulation spacer [2] places the upper edge of base [1], electrode tip holder [3] is inserted in the base [1], metal electrode [5] is fixed on the insulating support [4], inject then in the electrode tip holder [3], make the pommel of the metal electrode [5] in the pipeline be positioned at the center of pipe, cover cap [6] places on the base [1];

The portable type measuring device by probe [10], shell [13], digital indicator [11], control circuit board [14], power supply [15], power switch [9], one group measure selector switch [8] and alarm [12] etc. and form; Probe [10] is installed in a side of shell [13] upper end, it is made up of metal inner electrode [17], metal external electrode [18], insulation rod [19] and socket [16], one end of metal inner electrode [17] is inserted in the inside of insulation rod [19], metal external electrode [18] is enclosed within the outside of insulation rod [19], and insulation rod [19] is inserted on the socket [16]; Power supply [15] and control circuit board [14] are installed on the base plate of shell [13], and power switch [9] and one group of measurement selector switch [8] are installed on the side plate of shell [13], and digital indicator [11] and alarm [12] are installed on the upper plate of shell [13].

2, electrostatic charge of oil detection alarm instrument according to claim 1 is characterized in that control circuit board ［ 14 ］ is made up of amplifying circuit, control circuit, display circuit and warning circuit.

3,, it is characterized in that insulating support ［ 4 ］ and insulation rod ［ 19 ］ all adopt the polytetrafluoroethylene material to make according to claim 1,2 described electrostatic charge of oil detection alarm instrument.