CN203309245U - Common rail pipe protection valve - Google Patents
Common rail pipe protection valve Download PDFInfo
- Publication number
- CN203309245U CN203309245U CN2013203111524U CN201320311152U CN203309245U CN 203309245 U CN203309245 U CN 203309245U CN 2013203111524 U CN2013203111524 U CN 2013203111524U CN 201320311152 U CN201320311152 U CN 201320311152U CN 203309245 U CN203309245 U CN 203309245U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- common rail
- spool
- rail pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Safety Valves (AREA)
Abstract
The utility model relates to a common rail pipe protection valve. The common rail pipe protection valve comprises a valve seat, a valve body, a spring, a pressure adjusting shim, a valve core, a sealing ball and an oil return pipe bolt, wherein the middle lower part of the valve seat is provided with a feed port; the valve seat is connected with the lower end of the valve body; the valve body is provided with a valve body cavity, the lower end of the valve body is open, and the upper end of the valve body is communicated with a discharge passage; the spring is fixedly arranged on the top of the inner wall of the valve body cavity; the pressure adjusting shim is fixedly arranged at the lower end of the spring; the valve core is fixedly arranged on the middle part of the bottom surface of the pressure adjusting shim; the valve core is cylindrical, the bottom of the valve core is provided with a spherical groove, and the periphery of the bottom of the valve core is cut into three cut surfaces from bottom to top and from deep to shallow; the sealing ball is embedded in the spherical groove of the valve core; the lower space of the sealing ball is aligned with the feed port of the valve seat; the upper end of the valve body is connected with the oil return pipe bolt; the valve body cavity is communicated with the cavity of the oil return pipe bolt through the discharge passage. The common rail pipe protection valve has a simple structure, is easy to machine, can realize non-stop resetting and dynamic pressure maintenance and has high applicability.
Description
Technical field
The utility model relates to a kind of Protective valve, relates in particular to a kind of common rail pipe Protective valve that is applicable to high-pressure fuel storage.
Background technique
Current along with emission regulation demands is more and more tighter; engine fuel oil system is progressively to the common rail system transition, and the pressure of oil-fired system is also increasing, and high pressure must be brought potential safety hazard; be necessary to design a Protective valve, system pressure is limited in a safety value.
Existing Protective valve mainly has the following disadvantages:
1) the general spool in high pressure sealing aspect adopts conical surface seal, yet the parts machining difficulty of conical surface seal form is large, is difficult to reach required precision;
2) in the engine common rail fuel injection system, use existing Protective valve to be connected with high-pressure fuel storage, if high-pressure fuel storage overpressure, Protective valve will be opened, after unlatching, can not make the pressure in high-pressure fuel storage maintain certain value or slowly reduce, but make the pressure in high-pressurre fuel accumualtor drop to zero at once, high-pressure fuel storage cisco unity malfunction now, whole system will quit work, before the vanishing of high-pressure fuel storage pressure, Protective valve can not reset, after only having pressure to reduce to zero, Protective valve just can reset,
3) valve body wall of existing Protective valve is provided with drainback passage; drainback passage need be communicated with the spill port of high-pressure fuel storage; spill port and oil return members; by Protective valve low pressure oil out, flow into fuel tank by the spill port on the high pressure fuel storage and oil return parts; if yet there is no spill port on the high pressure fuel storage; this Protective valve just can not be used; even spill port is arranged on high-pressure fuel storage; Protective valve not only will coordinate with high-pressure fuel storage while using; with the oil return parts, coordinate in addition, change while installing cumbersome.
Summary of the invention
Technical problem to be solved in the utility model is for the deficiencies in the prior art, provide a kind of simple in structure, be easy to process, good airproof performance, the Protective valve that with low cost, applicability is strong.
The technological scheme that the utility model solves the problems of the technologies described above is as follows: a kind of common rail pipe Protective valve comprises valve seat, valve body, spring, pressure adjusting pad sheet, spool, ball sealer and return tube bolt;
The middle and lower part of described valve seat is provided with material feeding mouth, and described valve seat is connected with valve body lower end; Described valve body is provided with body cavity, and its lower end is open, and its upper end is communicated with tapping channel; In described body cavity, be filled with spring; One end of described spring is fixed in the inwall top of body cavity, and its other end end is fixed with the pressure adjusting pad sheet; One side of described pressure adjusting pad sheet is provided with a through hole, and the middle part, bottom surface of described pressure adjusting pad sheet is fixed with spool; Described spool is cylinder type, and its bottom is provided with ball recess, and its bottom periphery becomes three cutting face by being deep to shallow cut from the bottom to top; The ball recess of described spool is embedded with ball sealer; The spool that described bottom is embedded with ball sealer can move up and down in the feeding-passage of valve seat, the material feeding mouth of described ball sealer aligned beneath valve seat, and described ball sealer can move up and down with spring, realizes sealing and unlatching to material feeding mouth; Described valve body upper end is connected with the return tube bolt, and body cavity is communicated with return tube bolt inner chamber by tapping channel.
The beneficial effects of the utility model are:
1) steel ball sealing is adopted in the spool end, has reduced difficulty of processing, has guaranteed sealed precision, has saved cost;
2) the spool cross-sectional sizes is gradual change, this special construction can realize that the pressure that Protective valve is opened in rear high-pressure fuel storage slowly reduces, or keep transient equiliblium to maintain in certain value, in this case, high-pressure fuel storage still can be worked, and before the pressure vanishing in high-pressure fuel storage, Protective valve can be realized resetting, and engine common rail fuel injection system pressure maintains lower pressure, and system is moved under protected mode;
3) adopt valve body and the bolted global design of return tube, make the replacing of Protective valve more convenient, and to the high-pressure fuel storage with spill port is not applicable equally, Applicable scope is wider.
On the basis of technique scheme, the utility model can also be done following improvement.
Further, the diameter of described feeding-passage equals the not diameter of cutting end of spool.
Further, between described valve seat and valve body, valve body and return tube bolt, be threaded connection.
Further, the wall of described return tube bolt is provided with two spill ports.
Adopt the beneficial effect of above-mentioned further scheme: adopt the return tube bolt; by the spill port on the return tube bolt, directly be connected with fuel tank by oil pipe; low pressure oil is through spill port; by oil pipe, enter in fuel tank; therefore; needn't require on high-pressure fuel storage, with spill port, to make Protective valve described in the utility model applicable equally to the storage without spill port, Applicable scope is wider.
Further, the outer wall cover of described return tube bolt has dust-proof sheath.
Adopt the beneficial effect of above-mentioned further scheme: before avoiding using, the foreign material such as dust enter into the return tube bolt by spill port.
Further, the upper and lower end of the dust-proof sheath of described return tube bolt outer wall respectively is fixed with a gasket seal.
Adopt the beneficial effect of above-mentioned further scheme: the sealing of guaranteeing the return tube bolt.
Further, described valve outer wall lower end is provided with outside thread, and valve body is connected with high-pressure fuel storage by outside thread.
Further, the outside thread top of described valve outer wall is provided with a seal ring.
Adopt the beneficial effect of above-mentioned further scheme: guarantee the sealing when Protective valve is connected with fuel under high pressure.
The accompanying drawing explanation
Fig. 1 is the sectional view of a kind of common rail pipe Protective valve described in the utility model;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is the structural drawing of spool described in the utility model;
Fig. 4 is the plan view of spool described in the utility model and ball sealer.
In accompanying drawing, the list of parts of each label representative is as follows:
1, valve seat, 2, valve body, 3, spring, 4, the pressure adjusting pad sheet, 5, spool, 6, ball sealer, 7, the return tube bolt, 8, dust-proof sheath, 9, gasket seal, 10, seal ring, 1-1, material feeding mouth, 1-2, feeding-passage, 2-1, body cavity, 2-2, tapping channel, 2-3, outside thread, 4-1, through hole, 5-1, spherical groove, 5-2, cutting face, 7-1, return tube bolt inner chamber, 7-2, spill port.
Embodiment
Below in conjunction with accompanying drawing, principle of the present utility model and feature are described, example, only be used to explaining the utility model, is not intended to limit scope of the present utility model.
As shown in Figure 1, a kind of common rail pipe Protective valve, comprise valve seat 1, valve body 2, spring 3, pressure adjusting pad sheet 4, spool 5, ball sealer 6 and return tube bolt 7;
The middle and lower part of described valve seat 1 is provided with material feeding mouth 1-1, and described valve seat 1 is connected with valve body 2 lower ends; Described valve body 2 is provided with body cavity 2-1, and its lower end is open, and its upper end is communicated with tapping channel 2-2; In described body cavity 2-1, be filled with spring 3; One end of described spring 3 is fixed in the inwall top of body cavity 2-1, and its other end end is fixed with pressure adjusting pad sheet 4; One side of described pressure adjusting pad sheet 4 is provided with a through hole 4-1, and the middle part, bottom surface of described pressure adjusting pad sheet 4 is fixed with spool 5; Described spool 5 is cylinder type, and its bottom is provided with ball recess 5-1, and its bottom periphery becomes three cutting face 5-2 by being deep to shallow cut from the bottom to top; The ball recess 5-1 of described spool 5 is embedded with ball sealer 6; The spool 5 that described bottom is embedded with ball sealer 6 can move up and down in the feeding-passage 1-1 of valve seat 1, the material feeding mouth 1-1 of described ball sealer 6 aligned beneath valve seats 1, and described ball sealer 6 can move up and down with spring 3, realizes sealing and unlatching to material feeding mouth 1-1; Described valve body 2 upper ends are connected with return tube bolt 7, and body cavity 2-1 is communicated with return tube bolt inner chamber 7-1 by tapping channel 2-2.
Wherein, the diameter of described feeding-passage 1-2 equals the not diameter of cutting end of spool 5.
Wherein, between described valve seat 1 and valve body 2, valve body 2 and return tube bolt 7, be threaded connection.
Wherein, the wall of described return tube bolt 7 is provided with two spill port 7-2.
Wherein, the outer wall cover of described return tube bolt 7 has dust-proof sheath 8; Before can avoiding like this using, the foreign material such as dust enter into the return tube bolt by spill port.
Wherein, the upper and lower end of the dust-proof sheath 8 of described return tube bolt 7 outer walls respectively is fixed with a gasket seal 9, to guarantee the sealing of return tube bolt 7.
Wherein, described valve body 2 outer wall lower ends are provided with outside thread 2-3, and valve body 2 is connected with high-pressure fuel storage by outside thread 2-3.
Wherein, the outside thread 2-3 top of described valve body 3 outer walls is provided with a seal ring 10, the sealing when guaranteeing that pressure protection valve is connected with high-pressure fuel storage.
Fig. 2 is the partial enlarged drawing of Fig. 1, now, pressure in high-pressure fuel storage is greater than the elastic force of spring 3, the time spring 3 compressed, ball sealer 6 leaves material feeding mouth 1-1, has certain gap between feeding-passage 1-2 top and spool 5, and fuel enters valve seat 1 from material feeding mouth 1-1, by the gap of feeding-passage 1-2 and spool 5, and then through the through hole 4-1 that gap and the pressure adjusting pad sheet 4 of pressure adjusting pad sheet 4 and valve seat 1 carries, enter into the body cavity 2-1 of valve body 2; Namely now Protective valve is in opening state.
Fig. 3 is the structural drawing of spool described in the utility model, Fig. 4 is the plan view of spool described in the utility model and ball sealer, described spool 5 is cylinder type, its bottom is provided with ball recess 5-1, its bottom periphery becomes three cutting face 5-2 by being deep to shallow cut from the bottom to top, the special construction design of spool 5, can realize that Protective valve pressure after unlatching maintains certain value, also can realize that Protective valve can realize resetting during in the 600bar left and right at the pressure of high-pressure fuel storage, under this pressure of 600bar, high-pressure fuel storage can work, therefore realized realizing resetting of Protective valve in non-stop-machine situation, diameter by designing different feeding-passage (1-2) and the diameter ratio relation of material feeding mouth (1-1), can obtain different reseat pressure values, the relation of the diameter of the diameter material feeding mouth (1-1) of reseat pressure and feeding-passage (1-2) the following is,
P2=（（D2）*（D2）*P1）/(（D1）*（D1）)
Wherein, P2 is reseat pressure, and D1 is the diameter of feeding-passage (1-2), and D2 is the diameter of material feeding mouth (1-1), and P1 is default cracking pressure.
F is the elastic force of spring,
When Protective valve is opened, F=(п (D2) * (D2) * P1)/4
When Protective valve resets, F=(п (D1) * (D1) * P2)/4
By designing different aperture ratios, can obtain different reseat pressure values, after Protective valve resetted, whole system was recovered normal working;
In addition, adopt steel ball sealing, simplified processing method, reduced difficulty of processing, reduced cost.
Below briefly introduce the working principle of Protective valve described in the utility model:
When the pressure in high-pressure fuel storage was smaller, ball sealer 6, under the effect of spring 3 elastic force, was blocked material feeding mouth 1-1, realizes seal action, when the pressure in high-pressure fuel storage is greater than predefined value, under the effect of ball sealer 6 pressure in high-pressure fuel storage, move up, while Compress Spring 3, now material feeding mouth 1-1 opens, fuel in high pressure accumulator enters into Protective valve, and the pressure in high-pressure fuel storage descends rapidly, in the process that Protective valve is opened, difference along with pressure in high-pressure fuel storage, on ball sealer, moving 6 distance can be different, the distance of moving on spool 5 also can be different, due to the special structural design of spool 5, make when on spool 5, moving the distance difference, spool 5 will be different from the gap between feeding-passage 1-2, will be different by the fuel quantity that spool 5 and gap between feeding-passage 1-2 flow in valve body 2, when the flow of the material feeding mouth 1-1 by valve seat (1) is identical with the some cross section flows of the spool 5 of flowing through, reach transient equiliblium, the pressure of high-pressurre fuel accumualtor can maintain a value, also can the pressure in high-pressurre fuel accumualtor be changed within the specific limits by regulating other parameters, when the pressure drop in high-pressure fuel storage during to certain value, spool 5 cylndrical surface, upper end and feeding-passage 1-2 agree with, realize sealing, now ball sealer 6 is not blocked the material feeding mouth 1-1 of valve seat 1, now still have in the fuel admission valve seat 1 in high-pressure fuel storage, but the fuel entered in valve seat 1 can not enter into valve body 2 again, the pressure in high-pressure fuel storage now is reseat pressure, but be not 0, reseat pressure is far smaller than cracking pressure.
The utility model mainly solves the restriction of maximum pressure in the engine common rail fuel injection system; and can make system pressure maintain low a little pressure, system is moved under protected mode, Protective valve described in the utility model is simple in structure; be easy to processing, interchangeability is good.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. a common rail pipe Protective valve, is characterized in that, comprises valve seat (1), valve body (2), spring (3), pressure adjusting pad sheet (4), spool (5), ball sealer (6) and return tube bolt (7);
The middle and lower part of described valve seat (1) is provided with material feeding mouth (1-1), and described valve seat (1) is connected with valve body (2) lower end; Described valve body (2) is provided with body cavity (2-1), and its lower end is open, and its upper end is communicated with tapping channel (2-2); In described body cavity (2-1), be filled with spring (3); One end of described spring (3) is fixed in the inwall top of body cavity (2-1), and its other end end is fixed with pressure adjusting pad sheet (4); One side of described pressure adjusting pad sheet (4) is provided with a through hole (4-1), and the middle part, bottom surface of described pressure adjusting pad sheet (4) is fixed with spool (5); Described spool (5) is cylinder type, and its bottom is provided with ball recess (5-1), and its bottom periphery becomes three cutting face (5-2) by being deep to shallow cut from the bottom to top; The ball recess (5-1) of described spool (5) is embedded with ball sealer (6); The spool (5) that described bottom is embedded with ball sealer (6) can move up and down in the feeding-passage (1-2) of valve seat (1), the material feeding mouth (1-1) of described ball sealer (6) aligned beneath valve seat (1), described ball sealer (6) can move up and down with spring (3), realizes sealing and unlatching to material feeding mouth (1-1); Described valve body (2) upper end is connected with return tube bolt (7), and body cavity (2-1) is communicated with return tube bolt inner chamber (7-1) by tapping channel (2-2).
2. a kind of common rail pipe Protective valve according to claim 1, is characterized in that, the diameter of described feeding-passage (1-2) equals the not diameter of cutting end of spool (5).
3. a kind of common rail pipe Protective valve according to claim 1, is characterized in that, is threaded connection between described valve seat (1) and valve body (2), valve body (2) and return tube bolt (7).
4. a kind of common rail pipe Protective valve according to claim 1, is characterized in that, the wall of described return tube bolt (7) is provided with two spill ports (7-2).
5. a kind of common rail pipe Protective valve according to claim 1, is characterized in that, the outer wall cover of described return tube bolt (7) has dust-proof sheath (8).
6. a kind of common rail pipe Protective valve according to claim 5, is characterized in that, the upper and lower end of the dust-proof sheath (8) of described return tube bolt (7) outer wall respectively is fixed with a gasket seal (9).
7. a kind of common rail pipe Protective valve according to claim 1, is characterized in that, described valve body (2) outer wall lower end is provided with outside thread (2-3), and valve body (2) is connected with high-pressure fuel storage by outside thread (2-3).
8. a kind of common rail pipe Protective valve according to claim 7, is characterized in that, outside thread (2-3) top of described valve body (2) outer wall is provided with a seal ring (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203111524U CN203309245U (en) | 2013-05-31 | 2013-05-31 | Common rail pipe protection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203111524U CN203309245U (en) | 2013-05-31 | 2013-05-31 | Common rail pipe protection valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203309245U true CN203309245U (en) | 2013-11-27 |
Family
ID=49615457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203111524U Withdrawn - After Issue CN203309245U (en) | 2013-05-31 | 2013-05-31 | Common rail pipe protection valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203309245U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277548A (en) * | 2013-05-31 | 2013-09-04 | 龙口龙泵燃油喷射有限公司 | Common rail pipe protection valve |
-
2013
- 2013-05-31 CN CN2013203111524U patent/CN203309245U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277548A (en) * | 2013-05-31 | 2013-09-04 | 龙口龙泵燃油喷射有限公司 | Common rail pipe protection valve |
| CN103277548B (en) * | 2013-05-31 | 2015-09-02 | 龙口龙泵燃油喷射有限公司 | A kind of common rail pipe protection valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202152857U (en) | Double valve seat adjustable valve | |
| CN203670808U (en) | Pilot-operated overflow valve | |
| CN101398096A (en) | Valve structure of pneumatic three-way regulating valve | |
| CN204140969U (en) | One-way valve | |
| CN203784001U (en) | Overflow valve | |
| CN103277548B (en) | A kind of common rail pipe protection valve | |
| CN204003799U (en) | There is the oil return filter core of bypass valve | |
| CN203309245U (en) | Common rail pipe protection valve | |
| CN201972985U (en) | Opening-closing bilateral control cartridge valve | |
| CN106382269B (en) | It is a kind of that there is speed governing, commutation, the combination valve of relief function | |
| CN104806594B (en) | Multi-way valve with oil cylinder load holding function | |
| CN202418609U (en) | Guiding and sealing valve for valve seat | |
| CN204878747U (en) | Cage cover choke valve | |
| CN201090549Y (en) | Bipolar electrohydraulic lead outflow valve | |
| CN205244515U (en) | Diesel engine is two -stage voltage limiting valve for high pressure common rail | |
| CN102221103A (en) | Regulating valve with double valve seats | |
| CN205244517U (en) | Relief valve that rate of opening and close is high | |
| CN205349901U (en) | Back pressure valve | |
| CN205605880U (en) | Thermal recovery steam control valve | |
| CN206112187U (en) | Pipeline voltage regulator device | |
| CN204985901U (en) | Pressure -limiting valve | |
| CN103697006A (en) | Overload oil replenishing valve for integral multi-path reversing valve | |
| CN102927073A (en) | Hydraulic sliding valve with anti-pollution structure | |
| CN203516754U (en) | Blocking-preventing regulating valve | |
| CN202708138U (en) | Stop valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131127 Effective date of abandoning: 20150902 |
|
| RGAV | Abandon patent right to avoid regrant |