CN108896127B

CN108896127B - Road bridge engineering vehicle oil mass on-line measuring device

Info

Publication number: CN108896127B
Application number: CN201811080600.8A
Authority: CN
Inventors: 苑学胜; 姜彦钊; 唐何才
Original assignee: Individual
Current assignee: Yuan Xuesheng
Priority date: 2018-09-17
Filing date: 2018-09-17
Publication date: 2023-07-25
Anticipated expiration: 2038-09-17
Also published as: CN108896127A

Abstract

The invention discloses an accurate, reliable, practical and safe road and bridge engineering vehicle oil mass on-line detection device, which comprises an oil tank, wherein a metal pipe which is horizontally arranged is fixed in the middle of the bottom of the oil tank, a first fixed coil and a second fixed coil which are axially and equidirectionally arranged with the metal pipe are arranged in the metal pipe, fixed shafts which are parallel to the metal pipe shafts are respectively arranged on two horizontal sides outside the metal pipe, a magnetic movable coil which is coupled with the first fixed coil or the second fixed coil is wound on the fixed shafts, the inner end head of the magnetic movable coil is fixed on the fixed shafts, the outer end head of the magnetic movable coil is connected with a hauling rope, the hauling rope is connected with a floater through a fixed pulley fixed at the bottom of the oil tank, the fixed coil and the second fixed coil are respectively connected with a processor through a current processing circuit, and the output of the processor is connected with a display circuit.

Description

Road bridge engineering vehicle oil mass on-line measuring device

Technical Field

The invention relates to an oil quantity detection device, in particular to an accurate, reliable, practical and safe road and bridge engineering vehicle oil quantity online detection device.

Background

At present, the known fuel quantity detection device of the fuel tank of the motor vehicle has various structural forms, and the floating ball type liquid level meter is one of the structural forms. The existing detection sensor of the floating ball type liquid level meter is provided with a measuring pipe, a plurality of reed pipes are arranged at different positions from top to bottom in the measuring pipe, a fixed end head used for being arranged and sealed on an oil tank, a transmitter, a wiring terminal and the like connected with the reed pipes are arranged at the upper end of the measuring pipe, and a magnetic floating ball is sleeved outside the measuring pipe. When the magnetic floating ball floats up and down along with the change of the liquid level, the magnetic coupling effect makes the contacts of the reed switch at the corresponding position attracted or disconnected, so that the total resistance (or voltage) of the sensor changes, and then the transmitter converts the changed resistance (or voltage) signal into a current signal of 4-20 mA, and the current signal is output to the measuring instrument through the wiring terminal. Compared with other oil tank oil quantity detection devices in the normal running state of the motor vehicle, the floating ball type liquid level meter has the characteristics of simple structure, convenient debugging, good reliability, high precision and the like. However, if the magnetic floating ball is mounted on the oil tank of the road and bridge engineering vehicle, the magnetic floating ball can shake up and down in the oil tank greatly along with jolt, rapid acceleration, rapid deceleration and the like of the road and bridge engineering vehicle. The magnetic floating ball is usually blocked or damaged due to the instant impact force generated when the sensor shakes in an out-of-range mode, so that the service life of the sensor is short (only about one month), the cost is increased, the detection accuracy is seriously affected, and the actual oil quantity of the oil tank cannot be truly reflected.

Disclosure of Invention

The invention aims to solve the technical problems in the prior art and provides an accurate, reliable, practical and safe road and bridge engineering vehicle oil mass on-line detection device.

The technical scheme of the invention is as follows: the utility model provides a road bridge engineering vehicle oil mass on-line measuring device, has the oil tank, is fixed with the metal pipe that the level set up in the middle of the oil tank bottom, there is axial and the first fixed coil and the second fixed coil of metal pipe syntropy in the metal pipe the outer level both sides of metal pipe are equipped with the fixed axle parallel with the metal pipe axle respectively, twine on the fixed axle have with first fixed coil or the magnetic movable coil of second fixed coil coupling, the magnetic movable coil inner end is fixed on the fixed axle, and the magnetic movable coil outer end meets with the haulage rope, the haulage rope meets with the float through the fixed pulley of fixing in the oil tank bottom, fixed coil and second fixed coil meet with the treater through current processing circuit respectively, the output and the display circuit of treater meet.

The invention is characterized in that a fixed coil is fixed in the middle position at the inner bottom of the oil tank, a magnetic movable coil parallel to the fixed coil shaft is arranged at the outer end of the magnetic movable coil, and the outer end of the magnetic movable coil is connected with the floater through the traction rope, so that the tightness of the magnetic movable coil is related to the oil quantity, and the tightness change of the magnetic movable coil directly influences the induction current generated by the fixed coil, so that the finally detected induction current can represent the oil quantity. Because both sides of the two fixed coils are provided with the magnetic moving coils, when the floater shakes up and down in the oil tank along with jolt, rapid acceleration, rapid deceleration and the like of the road bridge engineering vehicle, the generated induced currents compensate each other, so that the accurate on-line detection of the oil quantity of the oil tank can be realized. The invention can avoid the phenomenon that the magnetic floating ball of the existing floating ball type liquid level meter is blocked or damaged, and has the advantages of reliability, practicality, safety and the like.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present invention.

Fig. 2 is a schematic block circuit diagram of an embodiment of the present invention.

Fig. 3 is a schematic circuit diagram of an embodiment of the present invention.

Detailed Description

The invention relates to an on-line oil quantity detection device for road and bridge engineering vehicles, which comprises an oil tank 1 the same as the prior art, wherein a metal pipe 2 which is horizontally arranged is fixed in the middle position of the bottom of the oil tank 1, the axis of the metal pipe 2 can be parallel or perpendicular to the central line of a road and bridge engineering vehicle frame body, a first fixed coil 3 and a second fixed coil 4 which are in the same direction with the axis of the metal pipe 2 are arranged in the metal pipe 2, the first fixed coil 3 and the second fixed coil 4 can be respectively arranged at two ends of the axis of the metal pipe 2, the two sides of the outer horizontal side of the metal pipe 2 are respectively provided with a fixed shaft 5 which is parallel to the axis of the metal pipe 2, the fixed shaft 5 is wound with a magnetic movable coil 6 which is coupled with the first fixed coil 3 or the second fixed coil 4, namely, the magnetic movable coil 6 which is coupled with the first fixed coil 3 is wound on one fixed shaft 5, and the magnetic movable coil 6 which is coupled with the second fixed coil 4 is wound on the other fixed shaft 5. The inner end of the magnetic moving coil 6 is fixed on the fixed shaft 5, the outer end of the magnetic moving coil 6 is connected with the hauling rope 7, the hauling rope 7 is connected with the floater 9 through the fixed pulley 8 fixed at the bottom of the oil tank 1, the fixed coil 3 and the second fixed coil 4 are respectively connected with the processor 11 (a singlechip and the like) through the current processing circuit 10, and the output of the processor 11 is connected with the display circuit 12. The float 9 is made of non-magnetic materials such as ethylene propylene rubber, etc., for example, the haulage rope 7 is longer, and the float can be limited at the bottom of the oil tank 1 by a guide ring every 250 mm.

When the oil level is high (the oil amount is large), the floater 9 tightens the magnetic moving coil 6 through the traction rope 7, and increases the distance between the outer layer magnetic wire of the magnetic moving coil 6 and the fixed coil 3 or the fixed coil 4, so that the induction current is reduced; when the oil level is lowered (oil amount is reduced), the float 9 will loosen the magnetic moving coil 6 through the pulling rope 7, shortening the distance between the outer layer magnet wire of the magnetic moving coil 6 and the fixed coil 3 or the fixed coil 4, thereby increasing the induced current. The induced currents are amplified and analog-digital converted by the current processing circuit 10 and sent to the processor 11, and the two induced currents are calculated to obtain corresponding oil quantities, and the oil quantities are displayed by the display circuit 12. Because two floats 9, the magnetic moving coil 6, the fixed coil 3 and the fixed coil 4 are arranged, when the two floats 9 shake up and down in the oil tank along with jolt, rapid acceleration, rapid deceleration and the like of the road and bridge engineering vehicle, the two induction currents can be reduced simultaneously and one induction current is increased and the other induction current is reduced compared with the induction current (oil quantity) at the previous moment, and the processor 11 can perform compensation operation according to the magnitude of the induction current input by the two current processing circuits 10, so that the accurate oil quantity is obtained.

Claims

1. The utility model provides a road bridge engineering vehicle oil mass on-line measuring device, has the oil tank, its characterized in that: a metal pipe which is horizontally arranged is fixed in the middle of the bottom of the oil tank, the axis of the metal pipe is parallel or perpendicular to the central line of a road and bridge engineering vehicle frame body, a first fixed coil and a second fixed coil which are in the same direction with the metal pipe are arranged in the metal pipe, the first fixed coil and the second fixed coil are respectively arranged at two axial ends in the metal pipe, fixed shafts which are parallel to the metal pipe shafts are respectively arranged at two horizontal sides outside the metal pipe, a magnetic moving coil which is coupled with the first fixed coil is wound on one fixed shaft, a magnetic moving coil which is coupled with the second fixed coil is wound on the other fixed shaft, the inner end of the magnetic moving coil is fixed on the fixed shaft, the outer end of the magnetic moving coil is connected with a hauling rope, the hauling rope is connected with a floater through a fixed pulley which is fixed at the bottom of the oil tank, the first fixed coil and the second fixed coil are respectively connected with a processor through a current processing circuit, and the output of the processor is connected with a display circuit; the floater is made of ethylene propylene rubber, and guide rings for limiting the haulage rope are arranged at intervals of 250mm at the bottom of the oil tank.