CN101943621A - Method for preventing fuel oil from leaking in fuel oil pressure test - Google Patents
Method for preventing fuel oil from leaking in fuel oil pressure test Download PDFInfo
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- CN101943621A CN101943621A CN2009100321533A CN200910032153A CN101943621A CN 101943621 A CN101943621 A CN 101943621A CN 2009100321533 A CN2009100321533 A CN 2009100321533A CN 200910032153 A CN200910032153 A CN 200910032153A CN 101943621 A CN101943621 A CN 101943621A
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- valve
- gland
- plunger tip
- test bar
- reference test
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Abstract
The invention relates to a method for preventing fuel oil from leaking in a fuel oil pressure test. A leakage preventing device comprises a test rod, a gland, a top core and a valve, wherein the inner wall of the test rod is provided with an upper seal ring and a lower seal ring along the circumferential direction; the upper part of the top core is connected with the gland to be a whole; the lower part of the top core is inserted into the inner cavity of the test rod; the upper seal ring covers the top core; the valve which is in a frustum shape is arranged below the top core; a spring is installed between the bottom of the valve and the bottom of the test rod and enables the conical surface of the valve to be glued with the lower seal ring; an oil duct is arranged inside the gland and the top core, and penetrates through the gland and the top core; the inlet of the oil duct is arranged on the side wall of the bottom of the top core, and the outlet of the oil duct is arranged on the gland; when the gland is connected with the test rod, the top core moves downwards to push the valve so as to separate the conical surface of the valve from the lower seal ring; the lower seal ring covers the top core; and the inlet of the oil duct on the side wall of the bottom of the top core is communicated with a cavity in which the valve is arranged. The device can ensure no fuel oil leakage when in test.
Description
Technical field
The present invention relates to a kind of method that prevents that under high pressure vehicle fuel from leaking, relate in particular to automobile fuel pressure tester leak-proof device, belong to the checkout equipment technical field.
Background technology
The automobile fuel pressure tester is to detect the whether testing tool of operate as normal of motor car engine fuel oil supply system, because whole test process is to test in the process of motor car engine operation, if fuel leakage is arranged in the test process, not only influence accuracy of detection, and might damage engine, but even fire hazard.
Current, the automobile fuel pressure tester adopts is usually measuring the method that interface is provided with valve, and its structural volume is big, cost is high, troublesome poeration.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of automobile fuel pressure tester leak-proof device is provided.
Purpose of the present invention is achieved through the following technical solutions:
Prevent the method for fuel leakage in the fuel pressure test, characteristics are: automobile fuel pressure tester leak-proof device comprises reference test bar, gland, plunger tip and valve, described reference test bar is a cylinder-like structure, inwall edge at reference test bar circumferentially is provided with the two seals circle, promptly go up O-ring seal and lower seal, the top and the gland of described plunger tip are connected in one, and insert in the inner chamber of reference test bar the bottom of plunger tip, and last O-ring seal contains plunger tip; Valve is set below plunger tip, and described valve is frustum, and a spring is installed between the bottom surface of the bottom surface of valve and reference test bar, by spring the conical surface of valve and lower seal is fitted; In addition, in the inside of gland and plunger tip the oil duct that connects is set, the import of oil duct is positioned on the sidewall of plunger tip bottom, and the outlet of oil duct is positioned on the gland; When described gland was connected with reference test bar, plunger tip moved down the promotion valve, and the conical surface of valve and lower seal are separated, and lower seal contains plunger tip, and the oil duct import that is positioned on the sidewall of plunger tip bottom is connected with the residing chamber of valve.
Further, prevent the method for fuel leakage in the above-mentioned fuel pressure test, wherein, the excircle at described reference test bar top is provided with external thread, and described gland is provided with internal thread, and described internal thread and external thread match.
Further, prevent the method for fuel leakage in the above-mentioned fuel pressure test, wherein, the excircle of described reference test bar bottom is provided with taper thread.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
Unique, the novel structure of this device design can prevent under high pressure that vehicle fuel from leaking, and the tensimeter loading and unloading is very convenient; Whole apparatus structure is simple, and cost is low, and is economical and practical.
Description of drawings
Below in conjunction with accompanying drawing technical solution of the present invention is described further:
Fig. 1: structural representation of the present invention.
The implication of each Reference numeral sees the following form among the figure:
Embodiment
At the characteristics of automobile fuel pressure test, design a kind of device that under high pressure prevents the vehicle fuel leakage, by segmented seal and in order mode such as sealing realize having good anti-leak function.
As shown in Figure 1, automobile fuel pressure tester leak-proof device, mainly comprise reference test bar 1, gland 2, plunger tip 5 and valve 6, reference test bar 1 is a cylinder-like structure, inwall edge at reference test bar 1 circumferentially is provided with the two seals circle, promptly goes up O-ring seal 3 and lower seal 4, and the top of described plunger tip 5 and gland 2 are connected in one, insert in the inner chamber of reference test bar the bottom of plunger tip 5, and last O-ring seal 3 contains plunger tip 5; Valve 6 is set below plunger tip 5, and valve 6 is frustum, and a spring 7 is installed between the bottom surface of the bottom surface of valve 6 and reference test bar 1, by spring 7 conical surface of valve 6 and lower seal 4 is fitted; In addition, in the inside of gland 2 and plunger tip 5 oil duct that connects is set, the import of oil duct is positioned on the sidewall of plunger tip 5 bottoms, and the outlet of oil duct is positioned on the gland 2; Gland 2 is provided with internal thread, the excircle at reference test bar 1 top is provided with external thread, internal thread and external thread match, when gland 2 is threaded onto on the reference test bar 1, be gland 2 when being threaded with reference test bar 1, plunger tip 5 moves down and promotes valve 6, and the conical surface of valve 6 and lower seal 4 are separated, lower seal 4 contains plunger tip 5, and the oil duct import that is positioned on the plunger tip 5 bottom sidewalls is connected with valve 6 residing chambers.In addition, the excircle of reference test bar 1 bottom is provided with taper thread.
During concrete the application, this device is installed on the motor car engine by the taper thread of reference test bar 1 bottom excircle, and gland 2 oils and exports B and be connected with tensimeter by flexible pipe.When measuring, gland 2 is screwed on the reference test bar 1, plunger tip 5 seals with last O-ring seal 3 earlier, plunger tip 5 continues descending promotion valve 6 then, plunger tip 5 is slowly opened valve 6, and plunger tip 5 enters lower seal 4, and the oil duct import on the plunger tip 5 bottom sidewalls is connected with valve 6 residing chambers; And the fuel oil of motor car engine enters the valve 6 residing chambers from the hydraulic fluid port A of reference test bar 1 bottom surface, the oil duct import of fuel oil from plunger tip 5 bottom sidewalls entered the oil duct that plunger tip 5 and gland 2 inside connect, oil outlet B through the through tensimeter of flexible pipe from gland 2 at last, tensimeter obtains pressure, and pressure is detected.After test finishes, unscrew gland 2, plunger tip 5 withdraws from lower seal 4, and valve 6 and then enters lower seal 4, and fuel oil is closed.
In sum, modern design of the present invention has good anti-leak function in Test Application, effectively prevent fuel leakage when tensimeter is mounted or unloads, and the tensimeter loading and unloading are very convenient; Whole apparatus structure is simple, and cost is low, and is economical and practical.
More than, content of the present invention has been done further detailed description by embodiment by the accompanying drawing illustrated embodiment.But this should be interpreted as that the scope of theme of the present invention only limits to above example.Under the situation that does not break away from the above-mentioned technological thought of the present invention, various replacements or the change of making according to ordinary skill knowledge and customary means, all should be included in protection scope of the present invention.
Claims (3)
1. prevent the method for fuel leakage in the fuel pressure test, it is characterized in that: automobile fuel pressure tester leak-proof device comprises reference test bar (1), gland (2), plunger tip (5) and valve (6), described reference test bar (1) is a cylinder-like structure, inwall edge at reference test bar (1) circumferentially is provided with the two seals circle, promptly go up O-ring seal (3) and lower seal (4), the top of described plunger tip (5) and gland (2) are connected in one, insert in the inner chamber of reference test bar the bottom of plunger tip (5), and last O-ring seal (3) contains plunger tip (5); In the below of plunger tip (5) valve (6) is set, described valve (6) is frustum, and a spring (7) is installed between the bottom surface of the bottom surface of valve (6) and reference test bar (1), by spring (7) conical surface of valve (6) and lower seal (4) is fitted; In addition, in the inside of gland (2) and plunger tip (5) oil duct that connects is set, the import of oil duct is positioned on the sidewall of plunger tip (5) bottom, and the outlet of oil duct is positioned on the gland (2); Described gland (2) and reference test bar (1) are when being connected, plunger tip (5) moves down and promotes valve (6), the conical surface and the lower seal (4) of valve (6) are separated, lower seal (4) contains plunger tip (5), and the oil duct import that is positioned on the sidewall of plunger tip (5) bottom is connected with the residing chamber of valve (6).
2. prevent the method for fuel leakage in the fuel pressure test according to claim 1, it is characterized in that: the excircle at described reference test bar (1) top is provided with external thread, and described gland (2) is provided with internal thread, and described internal thread and external thread match.
3. prevent the method for fuel leakage in the fuel pressure test according to claim 1, it is characterized in that: the excircle of described reference test bar (1) bottom is provided with taper thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100321533A CN101943621A (en) | 2009-07-10 | 2009-07-10 | Method for preventing fuel oil from leaking in fuel oil pressure test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100321533A CN101943621A (en) | 2009-07-10 | 2009-07-10 | Method for preventing fuel oil from leaking in fuel oil pressure test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101943621A true CN101943621A (en) | 2011-01-12 |
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ID=43435730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100321533A Pending CN101943621A (en) | 2009-07-10 | 2009-07-10 | Method for preventing fuel oil from leaking in fuel oil pressure test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101943621A (en) |
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2009
- 2009-07-10 CN CN2009100321533A patent/CN101943621A/en active Pending
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110112 |