CN204941759U - Buffer type gas injection valve - Google Patents
Buffer type gas injection valve Download PDFInfo
- Publication number
- CN204941759U CN204941759U CN201520673660.6U CN201520673660U CN204941759U CN 204941759 U CN204941759 U CN 204941759U CN 201520673660 U CN201520673660 U CN 201520673660U CN 204941759 U CN204941759 U CN 204941759U
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- valve
- cavity
- buffer
- buffer cavity
- hydraulic pressure
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- 238000002347 injection Methods 0.000 title claims abstract description 14
- 239000007924 injection Substances 0.000 title claims abstract description 14
- 239000003921 oil Substances 0.000 claims description 19
- 239000010720 hydraulic oil Substances 0.000 claims description 11
- 238000013016 damping Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 239000007921 spray Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 14
- 239000007788 liquid Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011176 pooling Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Magnetically Actuated Valves (AREA)
Abstract
The utility model belongs to gas spray valve technical field, particularly relate to a kind of buffer type gas injection valve, hydraulic pressure cavity and buffer cavity is provided with in rear valve body of the present utility model, buffer cavity is provided with opening, unidirectional oil circuit is provided with between hydraulic pressure cavity and buffer cavity, unidirectional oil circuit leads to buffer cavity by hydraulic pressure cavity, the valve stem of spool is provided with poppet head, poppet head is just to the opening of buffer cavity, during described inlet close, the opening that poppet head part stretches into buffer cavity makes buffer cavity seal, the utility model can prevent spool rigid impact air inlet oral area, avoid the fatigue damage causing spool and air inlet oral area.
Description
Technical field
The utility model belongs to valve technology field, particularly relates to a kind of buffer type gas injection valve.
Background technique
Gas spray valve is mainly used in the ejecting system of gas, Chinese utility model patent CN204437431U discloses the fast gas spray valve of a kind of accuracy of spray high response speed that the applicant proposes, it adopts two solenoid valves to control oil-feed and pressure release respectively, and its return spring adopts special helical spring and is furnished with the pressure regulating screw regulating return spring initial compression amount, the fluctuation of spool in movement process is significantly reduced, improve the control accuracy of valve, the closing course of valve mainly relies on the effect of the spring-back force of the return spring be arranged between spool and valve body to realize, in the later stage of spool closing motion, spool under the spring-back force of return spring and the acting in conjunction of the inertial force of self rigid impact on valve body, therefore the colliding forces between spool and valve body is larger, along with the accumulation of clashing into number of times, the easy fatigue damage of colliding part of spool and valve body, finally make valve loss of function.
Model utility content
In view of the above defect in prior art, technical problem to be solved in the utility model is to provide a kind of buffer type gas injection valve, when spool is closed, can prevent the oral area of spool rigid impact suction port, avoid the fatigue damage causing spool and suction port oral area.
For solving the problems of the technologies described above, the technical solution of the utility model is a kind of buffer type gas injection valve, comprising: the front valve shell be fixed together and rear valve body, and described front valve shell is provided with suction port and air outlet, in described front valve shell, valve seat is installed, in described rear valve body, is provided with hydraulic pressure cavity; Spool, described spool comprises valve block portion and valve stem, described valve block portion and described suction port suitable, extend in described hydraulic pressure cavity in the mounting hole that described valve stem is slidably mounted on described valve seat; For making the return spring of described spool return, described return spring is installed in described front valve shell or rear valve body; Be installed on the first switch electromagnetic valve on described rear valve body and second switch solenoid valve, described first switch electromagnetic valve is connected with described hydraulic pressure cavity by hydraulic oil inlet, and described second switch solenoid valve is connected with described hydraulic pressure cavity by hydraulic oil outlet.Offer buffer cavity in described rear valve body, described buffer cavity is provided with opening; Be provided with unidirectional oil circuit between described buffer cavity and described hydraulic pressure cavity, described unidirectional oil circuit leads to described buffer cavity by described hydraulic pressure cavity; The valve stem of described spool is provided with poppet head, described poppet head is just to the opening of described buffer cavity, the shape of described poppet head is corresponding to the shape of the opening of described buffer cavity, and during described inlet close, described poppet head part stretches into the opening that described buffer cavity seals described buffer cavity.
Improve as one, unidirectional oil circuit comprises one and is opened in the passage that rear valve body is interior, be communicated with hydraulic pressure cavity and buffer cavity, and be provided with a valve ball and a damping spring in passage, valve ball is relied on by damping spring on a conical sealing surface in passage.
Improve as one, the rear end of rear valve body is provided with adjustment screw, and buffer cavity is opened on the body of adjustment screw.
Improve as one, poppet head is conical, and the opening of buffer cavity is circular open.
Improve as one, return spring is sheathed on the valve rod of spool, and is crimped between poppet head and the antetheca of hydraulic pressure cavity.
Improve as one, return spring is the volute spring that one end diameter is large, one end diameter is little.
After adopting technique scheme, the beneficial effects of the utility model are:
Owing to being provided with buffer cavity in rear valve body, buffer cavity is provided with opening, the unidirectional oil circuit being led to buffer cavity by hydraulic pressure cavity is provided with between hydraulic pressure cavity and buffer cavity, the valve stem of spool is provided with poppet head, poppet head is just to the opening of buffer cavity, during inlet close, poppet head part stretches into the opening of buffer cavity sealing buffer cavity, when valve cuts out under the effect of return spring, valve block portion moves to suction port direction, valve block portion and suction port oral area close time, poppet head closes buffer cavity, in buffer cavity, oil pressure raises, to the effect that the motion of spool is played buffering and hindered, alleviate the gouging abrasion of spool and suction port oral area when valve cuts out, extend the life-span of spool.
Because unidirectional oil circuit comprises a passage being opened in rear valve body, being communicated with hydraulic pressure cavity and buffer cavity, a valve ball and a damping spring is provided with in passage, valve ball relies on a conical sealing surface in passage by damping spring, to prevent high pressure oil reverse flow, this kind of structure structure is simple, be easy to assembling, good sealing effect.
Rear end due to rear valve body is provided with adjustment screw, and buffer cavity is opened on the body of adjustment screw, the distance of adjustment screw adjustable buffer cavity and poppet head, thus the size of cushion effect suffered by adjustment spool.
Because poppet head is conical, the opening of buffer cavity is circular open, and poppet head can be made to stretch into smoothly in buffer cavity to realize pooling feature.
Because return spring is sheathed on the valve rod of spool, and be crimped between poppet head and the antetheca of hydraulic pressure cavity, return spring can make the timely return of spool, and return spring is arranged in hydraulic pressure cavity, makes compact structure of the present utility model.
Because return spring is the volute spring that one end diameter is large, one end diameter is little, the responsive type at volute spring stressed initial stage is good, larger decrement can be produced under the effect of less power, spool can be rapidly to stress balance point and move, therefore the fast response time of valve, in the later stage that spool starts, the elastic force of volute spring sharply can increase along with the increase of self decrement, the movement velocity of spool is kept to zero rapidly, and spool is reduced in the fluctuating range of equinoctial point, and control accuracy is improved.
In a word, technological scheme disclosed in the utility model can alleviate the gouging abrasion of spool and suction port oral area when valve cuts out, and improves reliability and the working life of valve.
Accompanying drawing explanation
Fig. 1 is longitudinal sectional view of the present utility model;
In figure: 101-front valve shell, 102-rear valve body, 2-spool, 21-poppet head, 3-hydraulic pressure cavity, 4-first switch electromagnetic valve, 5-second switch solenoid valve, 6-valve seat, 71-passage, 72-valve ball, 73-damping spring, 8-suction port, 9-air outlet, 10-valve pocket, 11-buffer cavity, 14-return spring, 15-adjusts screw.
Embodiment
Clearly understand to make the purpose of this utility model, technological scheme and advantage, below in conjunction with Figure of description and embodiment, the utility model is further elaborated, be to be understood that, specific embodiment described herein only in order to explain the utility model, and is not used in restriction the utility model.
As shown in Figure 1, a kind of buffer type gas injection valve, comprise the front valve shell 101 and rear valve body 102 that are fixed together, front valve shell 101 is provided with suction port 8 and air outlet 9, suction port 8 place is provided with valve pocket 10, and valve pocket 10 adopts high-abrasive material, and valve pocket 10 is the oral area of suction port 8, in front valve shell 101, valve seat 6 is also installed, in rear valve body 102, is provided with hydraulic pressure cavity 3.
Spool 2 comprises valve block portion and valve stem, valve block portion and valve pocket 10 suitable, extend in hydraulic pressure cavity 3 in the mounting hole that valve stem is slidably mounted on valve seat 6.
Return spring 14 is sheathed on the valve rod of spool 2, and between the antetheca being crimped to poppet head 21 and hydraulic pressure cavity 3, return spring 14 can make spool 2 return in time, return spring 14 is arranged in the hydraulic pressure cavity 3 of rear valve body 102, make compact structure of the present utility model, certainly, return spring 14 also can be arranged in front valve shell 101.Return spring 14 preferentially adopts the volute spring that one end diameter is large, one end diameter is little, the responsive type at volute spring stressed initial stage is good, larger decrement can be produced under the effect of less power, spool 2 can be rapidly to stress balance point and move, therefore the fast response time of valve, in the later stage that spool 2 starts, the elastic force of volute spring sharply can increase along with the increase of self decrement, the movement velocity of spool 2 is kept to zero rapidly, spool 2 is reduced in the fluctuating range of equinoctial point, and control accuracy is improved.Also common cylindrical compression spring etc. can be adopted in order to reduce costs.
First switch electromagnetic valve 4 and second switch solenoid valve 5 are installed on rear valve body 102, first switch electromagnetic valve 4 is connected with hydraulic pressure cavity 3 by hydraulic oil inlet, second switch solenoid valve 5 is connected with hydraulic pressure cavity 3 by hydraulic oil outlet, offer buffer cavity 11 in rear valve body 102, buffer cavity 11 is provided with opening; Be provided with unidirectional oil circuit between buffer cavity 11 and hydraulic pressure cavity 3, unidirectional oil circuit leads to buffer cavity 11 by hydraulic pressure cavity 3.Unidirectional oil circuit comprises one and is opened in the passage 71 that rear valve body 102 is interior, be communicated with hydraulic pressure cavity 3 and buffer cavity 11, a valve ball 72 and a damping spring 73 is provided with in passage 71, valve ball 72 relies on a conical sealing surface in passage 71 by damping spring 73, to prevent high pressure oil reverse flow, the structure of this kind of structure is simple, be easy to assembling, good sealing effect.
The valve stem of spool 2 is provided with poppet head 21, poppet head 21 is just to the opening of buffer cavity 11, the shape of poppet head 21 is corresponding to the shape of the opening of buffer cavity 11, and when suction port 8 is closed, poppet head 21 part stretches into the opening that buffer cavity 11 seals buffer cavity 11.When valve cuts out under the effect of return spring 14, the valve block portion of spool 2 moves to suction port 8 direction, valve block portion and valve pocket 10 close time, poppet head 21 closes buffer cavity 11, in buffer cavity 11, oil pressure raises, to the effect that the motion of spool 2 is played buffering and hindered, alleviate spool 2 and the gouging abrasion of valve pocket 10 when valve cuts out, extend the life-span of spool 2.
The rear end of rear valve body 102 is provided with adjustment screw 15, and buffer cavity 11 is opened on the body of adjustment screw 15, the distance of adjustment screw 15 adjustable buffer cavity 11 and poppet head 21, thus the size of cushion effect suffered by adjustment spool 2.
Poppet head 21 is conical, and the opening of buffer cavity 11 is circular open, and poppet head 21 can be made to stretch into smoothly in buffer cavity 11 to realize pooling feature.
The working principle of the utility model buffer type gas injection valve is:
Opened by first switch electromagnetic valve 4, second switch solenoid valve 5 cuts out, and high pressure liquid force feed enters hydraulic pressure cavity 3 through hydraulic oil inlet, flows into unidirectional oil circuit, pushes sealing valve ball 72 open, flows out unidirectional oil circuit and enter buffer cavity 11, promotes spool 2 and moves, start open valve.
After spool 2 moves to certain distance, poppet head 21 leaves buffer cavity 11, and high pressure liquid force feed promotes spool 2 by hydraulic pressure cavity 3 and continues motion, and valve ball 72 to fall back sealing surface in the effect of damping spring 73.
Close the first switch electromagnetic valve 4, open second switch solenoid valve 5, hydraulic oil inlet is closed, and hydraulic oil outlet is opened, and the hydraulic oil of hydraulic pressure cavity 3 flows through hydraulic oil outlet and gets back to fuel tank, under the effect of return spring 14, spool 2 to closing direction motion, valve block portion and valve pocket 10 close time, poppet head 21 closes buffer cavity 11, in buffer cavity 11, oil pressure raises, to the effect that the motion of spool 2 is played buffering and hindered.
Again close second switch solenoid valve 5, open the first switch electromagnetic valve 4, high pressure liquid force feed enters hydraulic pressure cavity 3, enter rapidly buffer cavity 11 due to high pressure liquid force feed by unidirectional oil circuit and act on poppet head 21, therefore spool 2 can open suction port 8 by fast movement, namely buffer structure can only slow down the closing movement speed of spool 2, does not affect the opening movement speed of spool 2.
Above embodiment is the utility model preferred embodiment, not in order to limit the utility model, every within spirit of the present utility model and principle, and any amendment done, equivalent replacement, improvement etc., all should be included in protection domain of the present utility model.
Claims (6)
1. a buffer type gas injection valve, comprising:
The front valve shell be fixed together and rear valve body, described front valve shell is provided with suction port and air outlet, is provided with valve seat in described front valve shell, is provided with hydraulic pressure cavity in described rear valve body;
Spool, described spool comprises valve block portion and valve stem, and the oral area of described valve block portion and described suction port is suitable, extends in described hydraulic pressure cavity in the mounting hole that described valve stem is slidably mounted on described valve seat;
For making the return spring of described spool return, described return spring is installed in described front valve shell or rear valve body;
Be installed on the first switch electromagnetic valve on described rear valve body and second switch solenoid valve, described first switch electromagnetic valve is connected with described hydraulic pressure cavity by hydraulic oil inlet, and described second switch solenoid valve is connected with described hydraulic pressure cavity by hydraulic oil outlet; It is characterized in that,
Offer buffer cavity in described rear valve body, described buffer cavity is provided with opening;
Be provided with unidirectional oil circuit between described buffer cavity and described hydraulic pressure cavity, described unidirectional oil circuit leads to described buffer cavity by described hydraulic pressure cavity;
The valve stem of described spool is provided with poppet head, described poppet head is just to the opening of described buffer cavity, the shape of described poppet head is corresponding to the shape of the opening of described buffer cavity, and during described inlet close, described poppet head part stretches into the opening that described buffer cavity seals described buffer cavity.
2. buffer type gas injection valve as claimed in claim 1, it is characterized in that, described unidirectional oil circuit comprises one and is opened in the passage that described rear valve body is interior, be communicated with described hydraulic pressure cavity and buffer cavity, be provided with a valve ball and a damping spring in described passage, described valve ball is relied on by described damping spring on a conical sealing surface in described passage.
3. buffer type gas injection valve as claimed in claim 1 or 2, it is characterized in that, the rear end of described rear valve body is provided with adjustment screw, and described buffer cavity is opened on the body of described adjustment screw.
4. buffer type gas injection valve as claimed in claim 3, is characterized in that, described poppet head is conical, and the opening of described buffer cavity is circular open.
5. buffer type gas injection valve as claimed in claim 4, it is characterized in that, described return spring is sheathed on the valve rod of described spool, and between the antetheca being crimped to described poppet head and described hydraulic pressure cavity.
6. buffer type gas injection valve as claimed in claim 1, is characterized in that, described return spring is the volute spring that one end diameter is large, one end diameter is little.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520673660.6U CN204941759U (en) | 2015-09-01 | 2015-09-01 | Buffer type gas injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520673660.6U CN204941759U (en) | 2015-09-01 | 2015-09-01 | Buffer type gas injection valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204941759U true CN204941759U (en) | 2016-01-06 |
Family
ID=55009197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520673660.6U Active CN204941759U (en) | 2015-09-01 | 2015-09-01 | Buffer type gas injection valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204941759U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090265A (en) * | 2016-08-15 | 2016-11-09 | 潍坊力创电子科技有限公司 | Buffer type gas injection valve |
| CN109026482A (en) * | 2017-05-23 | 2018-12-18 | 罗伯特·博世有限公司 | Fuel injector |
-
2015
- 2015-09-01 CN CN201520673660.6U patent/CN204941759U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090265A (en) * | 2016-08-15 | 2016-11-09 | 潍坊力创电子科技有限公司 | Buffer type gas injection valve |
| CN106090265B (en) * | 2016-08-15 | 2018-06-01 | 潍坊力创电子科技有限公司 | Buffer type gas injection valve |
| CN109026482A (en) * | 2017-05-23 | 2018-12-18 | 罗伯特·博世有限公司 | Fuel injector |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |