CN211042346U

CN211042346U - A novel flowmeter for diesel injector test

Info

Publication number: CN211042346U
Application number: CN201922489813.2U
Authority: CN
Inventors: 杜辛春; 王玲
Original assignee: Boten Testing Equipment Suzhou Co ltd
Current assignee: Boten Testing Equipment Suzhou Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-07-17
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to flow detection equipment technical field especially relates to a novel flowmeter for diesel injector test. This a novel flowmeter for diesel injector is in the use engineering, under solenoid valve's control, the oil of waiting to detect the flow gets into the cylinder between cylinder bottom plate and the diaphragm through the oil inlet, oil gets into the cylinder and drives piston rod upward movement, piston rod upward movement drives position induction magnetic stripe upward movement through connecting diaphragm and magnet mounting panel, the magnetic encoder on the circuit board is according to the transform of position induction magnetic stripe position, calculate the flow that gets into the interior oil of cylinder, measuring resolution ratio can reach 0.01 ml/minute. In a word, this a novel flowmeter for diesel injector structural design is reasonable, can realize accurately detecting fast to diesel injector.

Description

A novel flowmeter for diesel injector test

Technical Field

The utility model relates to flow detection equipment technical field especially relates to a novel flowmeter for diesel injector test.

Background

The flow detection device on the market at present is gear type flowmeter mostly, because diesel oil possesses the characteristic of concentration, when diesel oil passes through the gear clearance, promotes the gear and rotates, by a magnetite transmission data of gear top surface, once a week measurement. Because the quality of diesel oil is different in different countries and regions, when the friction force between the gear and the diesel oil is required to be the same, the clearance between the gear and the shell is different; different processing enterprises have different clearance data between the gear and the shell, and the clearance control of different batches of products is difficult to control to be consistent. For this reason, the gear type flowmeter is inconsistent with the friction force of diesel oil in actual use, so that instability of gear acquisition data occurs. It is difficult to achieve a uniform standard; gear type flow meters can generate serious measurement leakage when the clearance is too large or the flow is small, thereby causing data distortion.

In addition to the difficulty in controlling the clearance between the mounted gear and the housing and the difficulty in ensuring the concentration of diesel fuel, the assembly accuracy and the cleanliness of diesel fuel pose challenges to strict detection standards. The diesel oil injector can generate trace impurities in the using process, so that a part of the diesel oil injector can be accumulated in the injector main body in the detection process, the diesel oil injector can flow into the gear type flowmeter during detection, the gear type flowmeter is inaccurate in metering, and the gear type flowmeter is blocked in serious cases.

It can be said that the difficulty is very great to satisfy the above requirements at the same time. In addition, because the gear flowmeter adopts the magnetic needle type induction metering, the gear can only be metered once after rotating for one circle, and the real-time metering and detection can not be realized during low flow. The single injection detection of the diesel injector cannot be detected, and whether the single injection of the diesel injector is abnormal or not can not be detected, so that the requirement of modern society on the detection of the diesel injector cannot be met.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect that exists among the background art, the utility model provides a technical scheme that its technical problem adopted is: a novel flowmeter for testing a diesel injector comprises a base, an oil inlet control assembly and air cylinders, wherein the base is fixedly provided with the oil inlet control assembly and an air cylinder lower fixing plate, the air cylinder lower fixing plate is fixedly provided with two air cylinders, the top end of each air cylinder is fixedly provided with an air cylinder upper fixing plate, the oil inlet control assembly is provided with an oil inlet corresponding to each air cylinder, an oil return port is arranged in the oil inlet control assembly, the top end of the oil inlet control assembly is provided with an electromagnetic valve, a piston rod is arranged in each air cylinder, the top end of the piston rod is fixedly provided with a magnetic stripe mounting plate through a connecting transverse plate, a position sensing magnetic stripe is fixed on the side surface of the magnetic stripe mounting plate, a circuit board mounting plate is fixed between the air cylinder lower fixing plate and the air cylinder upper fixing plate, a circuit board is, the bottom of magnetic stripe mounting panel is fixed with spacing magnetic needle mounting panel, be equipped with spacing magnetic needle on the spacing magnetic needle mounting panel, it is equipped with hall position sensor to correspond spacing magnetic needle on the circuit board, the bottom of cylinder is equipped with the cylinder lower cover, the top of cylinder is equipped with the cylinder upper cover, the top of the inside cylinder lower cover of cylinder is equipped with the diaphragm, the diaphragm is bent the after-fixing on the inside wall of cylinder, be equipped with the neck bush in the diaphragm, the bottom of piston rod is fixed on the neck bush, be equipped with the spring between the outside neck bush of piston rod and the cylinder upper cover.

Preferably, a protective cover is arranged outside the cylinder, the bottom of the protective cover is fixed on the base, and an indicating lamp and a wiring bar are arranged on the protective cover.

Preferably, the cylinder upper fixed plate is provided with a guide groove corresponding to the magnetic stripe mounting plate, and a guide rod corresponding to the magnetic stripe mounting plate and the limiting magnetic needle mounting plate is arranged between the cylinder lower fixed plate and the cylinder upper fixed plate.

Preferably, a sealing ring is arranged between the diaphragm and the cylinder.

The utility model relates to a novel flowmeter for diesel injector test, which is characterized in that under the control of an electromagnetic valve, oil to be tested enters a cylinder between a cylinder lower fixing plate and a diaphragm through an oil inlet in the use engineering, the oil enters the cylinder to drive a piston rod to move upwards, the piston rod moves upwards to drive a position sensing magnetic strip to move upwards through a connecting transverse plate and a magnet mounting plate, a magnetic encoder on a circuit board calculates the flow of the oil entering the cylinder according to the position change of the position sensing magnetic strip, when the oil entering the cylinder reaches a set value, a Hall position sensor arranged on the circuit board can sense the position information of a limiting magnetic needle, so that a solenoid valve is closed to enter an oil inlet channel in the cylinder, the oil to be discharged in the cylinder is under the action of a spring in the cylinder, the oil is discharged through the oil return port. Because the test oil enters the closed space, no leakage exists, and the test oil is irrelevant to the viscosity of the test oil, the test precision is high, and the adaptability is good. In a word, this a novel flowmeter for diesel injector structural design is reasonable, can realize accurately detecting fast to diesel injector.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic structural diagram I of a novel flowmeter for testing a diesel injector according to the present invention;

FIG. 2 is a schematic structural diagram II of the novel flowmeter for testing the diesel injector according to the present invention;

FIG. 3 is a schematic diagram showing the internal structure of the novel flowmeter for testing the diesel injector according to the present invention;

FIG. 4 is a schematic diagram of the internal structure of the novel flowmeter for testing the diesel injector according to the present invention;

FIG. 5 is a third schematic diagram of the internal structure of the novel flowmeter for testing the diesel injector according to the present invention;

FIG. 6 is an internal cross-sectional view of the novel flow meter for diesel injector testing of the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 6 at A;

wherein, 1, a bottom plate; 2. an oil feed control assembly; 3. an electromagnetic valve; 4. an oil inlet; 5. an oil return port; 6. A protective cover; 7. an indicator light; 8. a line bank; 9. a cylinder lower fixing plate; 10. a fixing plate is arranged on the cylinder; 11. A cylinder; 12. a piston rod; 13. connecting the transverse plates; 14. a magnetic strip mounting plate; 15. a position sensing magnetic strip; 16. A limiting magnetic needle mounting plate; 17. a limiting magnetic needle; 18. a circuit board mounting plate; 19. a circuit board; 20. a magnetic encoder; 21. a Hall position sensor; 22. a guide groove; 23. a guide bar; 24. a cylinder lower cover; 25. an upper cover of the cylinder; 26. a seal ring; 27. an inner liner; 28. a spring; 29. a diaphragm.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The attached drawings are simplified schematic diagrams, and merely illustrate the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.

Referring to fig. 1-7, a novel flowmeter for testing a diesel injector comprises a base 1, an oil inlet control assembly 2 and cylinders 11, wherein the base 1 is fixed with the oil inlet control assembly 2 and a lower cylinder fixing plate 9, the lower cylinder fixing plate 9 is fixed with two cylinders 11, the top end of each cylinder 11 is fixed with an upper cylinder fixing plate 10, the oil inlet control assembly 2 is provided with an oil inlet 4 corresponding to each cylinder 11, the oil inlet control assembly 2 is internally provided with an oil return port 5, the top end of the oil inlet control assembly 2 is provided with an electromagnetic valve 3, the cylinders 11 are internally provided with piston rods 12, the top ends of the piston rods 12 are fixed with magnetic stripe mounting plates 14 through connecting transverse plates 13, the side surfaces of the magnetic stripe mounting plates 14 are fixed with position sensing magnetic stripes 15, and a circuit board mounting plate 18 is fixed between the lower cylinder fixing plate 9 and the upper cylinder fixing plates 10, a circuit board 19 is fixed on the circuit board mounting plate 18, a magnetic encoder 20 is arranged on the circuit board 19 corresponding to the position sensing magnetic stripe 15, a limiting magnetic needle mounting plate 16 is fixed at the bottom of the magnetic stripe mounting plate 14, a limiting magnetic needle 17 is arranged on the limiting magnetic needle mounting plate 16, a hall position sensor 21 is arranged on the circuit board 19 corresponding to the limiting magnetic needle 17, a cylinder lower cover 24 is arranged at the bottom of the cylinder 11, a cylinder upper cover 25 is arranged at the top of the cylinder 11, a diaphragm 29 is arranged above the cylinder lower cover 24 inside the cylinder 11, the diaphragm 29 is fixed on the inner side wall of the cylinder 11 after being bent, an inner bushing 27 is arranged in the diaphragm 29, the bottom of the piston rod 12 is fixed on the inner bushing 27, a spring 28 is arranged between the outer inner bushing 27 of the piston rod 12 and the cylinder upper cover 25, and a protective cover 6 is arranged outside, the bottom of safety cover 6 is fixed on base 1, be equipped with pilot lamp 7 and wiring row 8 on the safety cover 6, it is equipped with guide way 22 to correspond magnetic stripe mounting panel 14 on the cylinder upper fixed plate 10, it is equipped with guide bar 23 to correspond magnetic stripe mounting panel 14 and spacing magnetic needle mounting panel 16 between cylinder lower fixing plate 9 and the cylinder upper fixed plate 10, be equipped with sealing washer 26 between diaphragm 29 and the cylinder 11.

The utility model relates to a novel flowmeter for diesel injector test, in the use engineering, under the control of electromagnetic valve, the oil to be detected flow enters into the cylinder between the cylinder bottom plate and the diaphragm through the oil inlet, the oil enters into the cylinder to drive the piston rod to move upwards, the piston rod moves upwards to drive the position induction magnetic stripe to move upwards through the connecting diaphragm and the magnet mounting plate, the magnetic encoder 20 on the circuit board 19 calculates the flow of the oil entering into the cylinder according to the position change of the position induction magnetic stripe 15, when the oil entering into the cylinder reaches the set value, the Hall position sensor 21 arranged on the circuit board 19 can sense the position information of the spacing magnetic needle 17, thereby the electromagnetic valve closes the oil inlet channel entering into the cylinder, the oil needing to be discharged in the cylinder is under the spring action in the cylinder, the oil is discharged through the oil return port. In a word, this a novel flowmeter for diesel injector structural design is reasonable, can realize accurately detecting fast to diesel injector. Simultaneously, the flowmeter also has the following advantages:

1. the flowmeter adopts a single-acting type oil cylinder sealed space metering mode, has no leakage problem and can realize accurate metering.

2. The flowmeter adopts the magnetic encoder to sense the position of the oil cylinder in real time, can detect the data of the diesel oil injector in real time, and is real-time, stable and reliable.

3. The flowmeter adopts the nitrile rubber diaphragm oil cylinder with low friction, can still easily act under the pressure of 0.01 kilogram, ensures that the metering data of each step can be stable, reliable and real, and can detect in real time.

4. The flowmeter has extremely high precision, can distinguish the micro flow of 0.01 ml per minute through the real-time tracking capacity of the magnetic encoder, and improves the flow measurement precision of only distinguishing ml per minute by 10 times compared with a gear type flowmeter.

5. The flowmeter has high detection efficiency, can detect once only by one rotation compared with the conventional gear type flowmeter, and can track the flow in real time by the magnetic encoder type flowmeter.

6. The flowmeter can realize single injection detection of the diesel oil injector, and single injection metering can realize the same collection of oil injection and oil return and accurately reflect static and homomorphic oil return faults. MDP (open pulse width) and NOP (open pressure) can be automatically and accurately tested.

7. The flowmeter has high detection precision, high speed and high stability, and can generate qualified flow compensation codes when the flow correction compensation codes of the oil sprayer need to be generated, so that occasions with high-precision spraying requirements are met.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. The utility model provides a novel flowmeter for diesel injector test, includes base (1), oil feed control assembly (2) and cylinder (11), its characterized in that: an oil inlet control assembly (2) and an air cylinder lower fixing plate (9) are fixed on the base (1), two air cylinders (11) are fixed on the air cylinder lower fixing plate (9), an air cylinder upper fixing plate (10) is fixed at the top end of each air cylinder (11), an oil inlet (4) is arranged on each oil inlet control assembly (2) corresponding to each air cylinder (11), an oil return opening (5) is arranged in each oil inlet control assembly (2), an electromagnetic valve (3) is arranged at the top end of each oil inlet control assembly (2), a piston rod (12) is arranged in each air cylinder (11), a magnetic stripe mounting plate (14) is fixed at the top end of each piston rod (12) through a connecting transverse plate (13), a position sensing magnetic stripe (15) is fixed on the side face of each magnetic stripe mounting plate (14), and a circuit board mounting plate (18) is fixed between each air cylinder lower fixing plate (9) and, a circuit board (19) is fixed on the circuit board mounting plate (18), a magnetic encoder (20) is arranged on the circuit board (19) corresponding to the position induction magnetic stripe (15), a limiting magnetic needle mounting plate (16) is fixed at the bottom of the magnetic stripe mounting plate (14), a limiting magnetic needle (17) is arranged on the limiting magnetic needle mounting plate (16), a Hall position sensor (21) is arranged on the circuit board (19) corresponding to the limiting magnetic needle (17), an air cylinder lower cover (24) is arranged at the bottom of the air cylinder (11), an air cylinder upper cover (25) is arranged at the top of the air cylinder (11), a diaphragm (29) is arranged above the air cylinder lower cover (24) inside the air cylinder (11), the diaphragm (29) is fixed on the inner side wall of the air cylinder (11) after being bent, a lining sleeve (27) is arranged in the diaphragm (29), and the bottom of the piston rod (12) is fixed on the lining sleeve, and a spring (28) is arranged between the outer inner bushing (27) of the piston rod (12) and the cylinder upper cover (25).

2. The novel flowmeter for testing the diesel injector according to claim 1, wherein a protective cover (6) is arranged outside the cylinder (11), the bottom of the protective cover (6) is fixed on the base (1), and an indicator light (7) and a wiring bar (8) are arranged on the protective cover (6).

3. The novel flowmeter for testing the diesel injector according to claim 1, wherein a guide groove (22) is formed in the cylinder upper fixing plate (10) corresponding to the magnetic strip mounting plate (14), and a guide rod (23) is arranged between the cylinder lower fixing plate (9) and the cylinder upper fixing plate (10) corresponding to the magnetic strip mounting plate (14) and the limiting magnetic needle mounting plate (16).

4. The new flowmeter for diesel injector testing according to claim 1, characterized in that a sealing ring (26) is provided between the diaphragm (29) and the cylinder (11).