CN205078526U - Oil return way protection device - Google Patents
Oil return way protection device Download PDFInfo
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- CN205078526U CN205078526U CN201520780744.XU CN201520780744U CN205078526U CN 205078526 U CN205078526 U CN 205078526U CN 201520780744 U CN201520780744 U CN 201520780744U CN 205078526 U CN205078526 U CN 205078526U
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- spool
- hydraulic pressure
- oil return
- conical surface
- plug
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Abstract
The utility model provides an oil return way protection device, includes case (2), hydraulic pressure end cap (5) and hydraulic valve (4), its characterized in that: be equipped with in case (2) front end circular conical surface groove sealing washer (1), the parallel laminating of circular conical surface is answered to case (2) front end circular conical surface and the cartridge pore pair on the hydraulic valve (4), and sealing washer (1) is pressed from both sides between the cartridge hole of case (2) and valve body (4), adopt such structural design after, the utility model discloses can realize an oil return way protection device, and when oil return way pressure does not exceed the setting value, not have any oil to leak from this protection device, after the pressure on oil return way exceeded the setting value, the case can be opened, and partial fluid is spout in can following hydraulic pressure end cap aperture, stopped the process of the test after letting the operator in time pinpoint the problems, can restrict oil return way pressure simultaneously, avoided the system component damage and caused the casualties.
Description
Technical field
The utility model relates to a kind of oil circuit protective gear, is particularly suitable for limiting its oil circuit maximum pressure in hydraulic system debugging process, prevents oil circuit superpressure.
Background technique
In hydraulic system debugging process, often need dismounting hydraulic element, leak outside in a large number to prevent fuel tank oil, generally in the middle of pumping source P and oil return T oil pipe, adopt quick inserting joint, when needs dismounting hydraulic element, quick inserting joint in the middle of oil return T oil pipe is separated, just can prevent fuel tank oil from leaking outside in a large number, when after correction great question hydraulic element, pumping source P is connected with the quick inserting joint on oil return T oil pipe, just can continue to debug hydraulic system, in debug process repeatedly, may due to the carelessness of commissioning staff, forget and start debugging is just carried out in the connection of the quick inserting joint of oil return T oil pipe, the system pressure maximum that the pressure of whole system can improve instantaneously, position explosion pressure release the weakest in system can be caused, cause component wear, serious meeting causes casualties, therefore need, on oil circuit, a set of protective gear is installed, prevent oil return T oil pipe superpressure.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of oil circuit protective gear, and restriction oil circuit pressure, avoids system element damage and cause casualties.
For solving the problem; a kind of oil circuit protective gear of the present utility model; comprise spool, hydraulic pressure plug and hydraulic valve it is characterized in that: in described spool nose circle conical surface groove, be provided with seal ring; the spool nose circle conical surface and the parallel laminating of the plug-in opening corresponding circle conical surface on hydraulic valve; because seal ring is sandwiched between spool and the plug-in opening of valve body, realize zero leakage function.
Make a call to a circular port in the middle of described hydraulic pressure plug, after pressure oil backs down spool, the circular port on hydraulic pressure plug, is ejected into air on the right side of hydraulic pressure plug.
Described spool right side cover has spring, and is provided with hydraulic pressure plug on the right side of described spring, controls the cracking pressure of spool by the elastic force changed between spring and hydraulic pressure plug.
After adopting such structural design; the utility model can utilize the spool of a with o circle, a little spring and a conventional hydraulic pressure plug to realize a kind of oil circuit protective gear; when oil circuit pressure does not exceed setting value; leak from this protective gear without any oil; after the pressure of oil circuit exceedes setting value; spool can be opened; part fluid can spray from hydraulic pressure plug aperture; allow after operator's Timeliness coverage problem and stop process of the test; oil circuit pressure can be limited simultaneously, avoid system element damage and cause casualties.
Accompanying drawing explanation
Fig. 1 is structural drawing of the present utility model;
Fig. 2 is schematic diagram of the present utility model;
In figure: 1, seal ring; 2, spool; 3, spring; 4, hydraulic valve; 5, hydraulic pressure plug.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
See Fig. 1, the utility model comprises seal ring 1, spool 2, spring 3, hydraulic pressure plug 5 and hydraulic valve 4.
Spool front end is the conical surface of a trough of belt, seal ring is provided with in spool nose circle conical surface groove, the spool nose circle conical surface and the parallel laminating of the plug-in opening corresponding circle conical surface on hydraulic valve, because seal ring is sandwiched between spool and the plug-in opening of valve body, realize zero leakage function.
Spool right side cover has spring, and is provided with hydraulic pressure plug on the right side of described spring, and the elastic force by changing spring controls the cracking pressure of spool.
Concrete, spring 3 is arranged on spool 2 right side, hydraulic pressure plug 5 is arranged on spring 3 right side, a circular port A is made a call in the middle of hydraulic pressure plug 5, hydraulic pressure plug 5 is fixedly mounted on the plug-in opening of valve body 4 by screw thread, spring 3 can be had certain decrement by hydraulic pressure plug 5, and cause the elastic force of spring oriented both sides expansion trend, this elastic force determines the cracking pressure size of spool 2.
After T mouth pressure on the left of hydraulic valve 4 exceedes the precompressed force value of spring 3, high pressure oil pushes spool 2 to the right open from T mouth, spool 2 is moved right certain distance, the oil of T mouth just enters the right side cavity of spool 2, after pressure oil backs down spool, circular port A on hydraulic pressure plug 5, be ejected into air on the right side of hydraulic pressure plug 5, in use, to properly protect outside this spout, can not aligning equipment and personnel, simultaneously very obvious, allow operator be very easy to find the fluid of ejection, the debugging of mistake can be stopped at once.
Specifically can implement in a variety of forms due to the utility model and not depart from spirit or the essence of model utility, so be to be understood that, above-described embodiment is not limited to any aforesaid details, and explain widely in the spirit and scope that should limit in claim of enclosing, therefore fall into whole change in claim or its equivalent scope and remodeling and all should be claim of enclosing and contained.
Claims (3)
1. an oil circuit protective gear; comprise spool (2), hydraulic pressure plug (5) and hydraulic valve (4); it is characterized in that: in described spool (2) nose circle conical surface groove, be provided with seal ring (1); spool (2) the nose circle conical surface and the parallel laminating of the plug-in opening corresponding circle conical surface on hydraulic valve (4); seal ring (1) is sandwiched between the plug-in opening of spool (2) and valve body (4), realizes zero leakage function.
2. a kind of oil circuit protective gear according to claim 1; it is characterized in that: in the middle of described hydraulic pressure plug (5), make a call to a circular port; after pressure oil backs down spool (2), the circular port on hydraulic pressure plug (5), is ejected into air from hydraulic pressure plug (5) right side.
3. a kind of oil circuit protective gear according to claim 1; it is characterized in that: described spool (2) right side cover has spring (3); and described spring (3) right side is provided with hydraulic pressure plug (5), controls the cracking pressure of spool (2) by the elastic force changed between spring (3) and hydraulic pressure plug (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520780744.XU CN205078526U (en) | 2015-10-10 | 2015-10-10 | Oil return way protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520780744.XU CN205078526U (en) | 2015-10-10 | 2015-10-10 | Oil return way protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205078526U true CN205078526U (en) | 2016-03-09 |
Family
ID=55430940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520780744.XU Active CN205078526U (en) | 2015-10-10 | 2015-10-10 | Oil return way protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205078526U (en) |
-
2015
- 2015-10-10 CN CN201520780744.XU patent/CN205078526U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |