CN208058042U - A kind of double protection check valves - Google Patents
A kind of double protection check valves Download PDFInfo
- Publication number
- CN208058042U CN208058042U CN201820526060.0U CN201820526060U CN208058042U CN 208058042 U CN208058042 U CN 208058042U CN 201820526060 U CN201820526060 U CN 201820526060U CN 208058042 U CN208058042 U CN 208058042U
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- Prior art keywords
- valve
- valve seat
- valve core
- poppet
- poppet valve
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Abstract
The utility model discloses a kind of double protection check valves; belong to hydraulic pressure design field; including valve body; the body cavity is provided with double spool; the double spool is made of the first valve seat, the first poppet valve core, the second valve seat, the second poppet valve core, the guide sleeve set gradually to the axial direction of oil outlet along valve body oil inlet; first poppet valve core is pressed in the first valve seat by being arranged the thrust of the first spring on it and forms sealing, and second poppet valve core is pressed in the second valve seat by being arranged the thrust of second spring on it and forms sealing.The utility model check valve is not only only hydraulic oil to be allowed to flow freely from a direction, and another direction is ended, and the effect of duplicate protection is also acted as.
Description
Technical field
The utility model belongs to Hydraulic design techniques field, and in particular to a kind of double protection check valves.
Background technology
Existing check valve is the single-acting structure of single spool, only medium is allowed to be flowed from P1 to the directions P2 at work, and
Do not allow opposite direction flowing, i.e., when fluid by P1 to P2 forward flows when, poppet valve core is opened in the case where P1 mouthfuls of oil liquid pressures act on, oil
Road is connected；When fluid opposite direction flowing, P2 mouthfuls of oil liquid pressures and spring force collective effect make oil duct close on spool, to
Cut off reversed oil duct.But there is problem and shortage existing for existing check valve：
(1) valve body and the integrated structure of seat design, valve body are only passed through modifier treatment, i.e. valve by existing one-way valve structures
Seat hardness is also only quenching and tempering hardness, and mixed impurity is attached on valve seat in fluid, and long-time repeated stock can cause valve seat to grind
Damage damage, causes spool that cannot closely close fluid and generate leakage, can not play the role of reversely sealing；
(2) since valve body only passes through modifier treatment, cause valve body and spool mating surface, sliding surface hardness inadequate, spool pole
Easily by fine particle clamping stagnation, failure of check valve is caused；
(3) it is relatively low reversely to end reliability for existing single spool structure one-way valve, in coal mine drilling machine hydraulic system, needs unidirectional
The key components and parts value of valve protection is higher, and the damage of check valve or spool clamping stagnation can cause its protective effect to fail, to
Cause larger economic loss.
Utility model content
In view of this, the utility model aim is to provide a kind of double protection check valves, to solve valve body and valve seat one
Seat hardness caused by formula structure is low the problem of leading to spool reversed seal failure, valve body hardness is low leads to asking for spool clamping stagnation
Topic, existing check valve single valve cored structure cause reversely to end the low problem of reliability.
Following technical solution that in order to achieve the above object, the utility model provides：
The utility model provides a kind of double protection check valves, including valve body, the body cavity are provided with double spool, institute
The double spool stated from set gradually to the axial direction of oil outlet along valve body oil inlet the first valve seat, the first poppet valve core, the second valve seat,
Second poppet valve core, guide sleeve composition, first poppet valve core are pressed by being arranged the thrust of the first spring on it in the
One valve seat simultaneously forms sealing, and second poppet valve core is pressed by being arranged the thrust of second spring on it in the second valve seat
And form sealing.
Further, first valve seat, the second valve seat, guide sleeve the face that plugs be inserted into the interpolation of body cavity with it
Enter face and forms interference tight fit.
Further, the interior inserting surface of the body cavity is equipped with for the first valve seat, the second valve seat to be mounted respectively
With three stages (9) of guide sleeve, three stages are along valve body oil inlet to oil outlet axially in the radially gradually interior of valve body
Spill at.
Further, second valve seat, be respectively provided with the first poppet valve core on guide sleeve, the second poppet valve core is worn
Channel.
Further, first poppet valve core, the second poppet valve core the face that plugs be inserted into the interior inserting surface in channel with it and formed
Clearance fit.
Further, the axis position of first valve seat, the first poppet valve core, the second valve seat, the second poppet valve core and guide sleeve
In on an axis.
Further, first valve seat, the first poppet valve core, the second valve seat, the second poppet valve core and guide sleeve are intended to make table
Face cure process.
The utility model has the beneficial effects that：
1, valve body and seat design are ensured into the shape and hardness of valve seat at split structure using new heat treatment process
In the range of design requirement so that sealing surface wearability enhances, and spool contamination resistance effectively improves, and reverse leakage amount is significantly
It reduces；
2, cure process is done on the surface of valve seat, poppet valve core and guide sleeve, ensures surface hardness meter and wearability；
3, using bivalve cored structure, it is embedded in high rigidity double-valve-seat and double spool in valve body, system is made to form duplicate protection,
Substantially increase the reliability reversely ended.Other advantages, target and feature of the utility model to a certain extent will with
Be illustrated in specification afterwards, and to a certain extent, based on to hereafter investigate to those skilled in the art and
Speech will be apparent, or can be instructed from the practice of the utility model.The target of the utility model and other
Advantage can be realized and obtained by following specification.
Description of the drawings
In order to keep the purpose of this utility model, technical solution and advantage clearer, below in conjunction with attached drawing to this practicality
It is novel to be preferably described in detail, wherein：
Fig. 1 is the structural schematic diagram of the double protection check valves of the utility model；
Reference numeral：Valve body 1, the first valve seat 2, the first poppet valve core 3, the first spring 4, the second valve seat 5, the second poppet valve core 6,
Second spring 7, guide sleeve 8, stage 9, channel 10；Oil inlet P 1, oil outlet P2.
Specific implementation mode
The utility model is further described With reference to embodiment.Wherein, being given for example only property of attached drawing
Illustrate, expression is only schematic diagram rather than pictorial diagram, should not be understood as the limitation to this patent；In order to which this reality is better described
With novel embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent the size of actual product；To ability
For field technique personnel, the omitting of some known structures and their instructions in the attached drawings are understandable.
The same or similar label correspond to the same or similar components in the attached drawing of the utility model embodiment；In this practicality
In novel description, it is to be understood that if having the instructions such as term "upper", "lower", "left", "right", "front", "rear" orientation or
Position relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description,
It does not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and operation, because
The terms describing the positional relationship in the drawings are only for illustration for this, should not be understood as the limitation to this patent, for ability
For the those of ordinary skill in domain, the concrete meaning of above-mentioned term can be understood as the case may be.
Embodiment is substantially as shown in the picture：A kind of double protection check valves provided in this embodiment, including valve body 1, it is described
1 inner cavity of valve body is provided with double spool, and the double spool along 1 oil inlet P 1 of valve body to the axial direction of oil outlet P2 from setting gradually
First valve seat 2, the first poppet valve core 3, the second valve seat 5, the second poppet valve core 6, guide sleeve 8 form, and first poppet valve core 3 passes through
The thrust for being arranged the first spring 4 on it presses in the first valve seat 2 and forms sealing, and second poppet valve core 6 passes through set
The thrust for being located at second spring 7 thereon presses in the second valve seat 5 and forms sealing.
Specifically, being equipped with the oil circuit through-hole (unmarked) being connected with valve body oil inlet P 1, the first cone valve in the first valve seat
Core, the second poppet valve core include conical valve platform (unmarked) and the valve rod (unmarked) being connected with the conical valve platform,
Valve rod is equipped with the radial direction oil hole (unmarked) being connected with its axial oil circuit (unmarked), is arranged on the valve rod of the first poppet valve core
First spring, and the both ends of the first spring are respectively acting on the conical valve platform and the second valve seat of the first poppet valve core, the
The second spring is arranged on the valve rod of two poppet valve cores, and the both ends of second spring are respectively acting on the circular cone of the second poppet valve core
Shape valve platform and guide sleeve, the axial oil circuit being arranged on the second poppet valve core are connected with valve body oil outlet P2.In use, when fluid by
When P1 is to P2 forward flows, P1 oil inlet high pressure oils overcome the spring force of the first spring, open the first poppet valve core, and then compress the
Two springs, and the second poppet valve core is opened, it is flowed out from P2 oil outlets；When fluid is by P2 oil outlets to P1 oil inlet reverse flows,
Second poppet valve core makes oil duct close under P2 oil outlets high pressure oil and second spring collective effect, meanwhile, the first poppet valve core is
It is further turned off oil duct under the action of one spring, ensures effectively sealing, forms duplicate protection.At this point, even if the second poppet valve core or
First poppet valve core seal failure, system still can keep check reliable.Using the above scheme, the utility model uses double spool knot
Structure, meanwhile, it is embedded in high rigidity double-valve-seat and double spool in valve body, system is made to form duplicate protection, substantially increases reversed cut
Reliability only.
The face that plugs of the first valve seat 2, the second valve seat 5, guide sleeve 8 in the present embodiment is inserted into 1 inner cavity of valve body with it
Interior inserting surface forms interference tight fit；And the interior inserting surface of 1 inner cavity of valve body is equipped with for the first valve seat 2, the to be mounted respectively
Three stages 9 of two valve seats 5 and guide sleeve 8, three stages 9 are along 1 oil inlet P 1 of valve body to oil outlet P2 axially in valve body 1
Radially gradually it is recessed.In this way, can be convenient for squeezing into the first valve seat, the second valve seat and guide sleeve successively in body cavity,
And it is reliable and stable that they are installed in body cavity, and ensure installation accuracy.
It is respectively provided with the first poppet valve core 3 on the second valve seat 5, guide sleeve 8 in the present embodiment, the second poppet valve core 6 is worn
If channel 10.Axial sliding movement, and the first cone valve are done in channel convenient for the valve rod of the first poppet valve core and the second poppet valve core
Core, the second poppet valve core valve rod plug face with its be inserted into channel interior inserting surface formed clearance fit.
The axis of the first valve seat 2, the first poppet valve core 3, the second valve seat 5, the second poppet valve core 6 and guide sleeve 8 in the present embodiment
Line is located on an axis.So that the efficiency of the first spring 4 and second spring 7 maximizes.
The first valve seat 2, the first poppet valve core 3, the second valve seat 5, the second poppet valve core 6 and guide sleeve 8 in the present embodiment are intended to
Do Surface hardening treatment.Ensure its inner and outer surfaces hardness and wearability.
Finally illustrate, above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, it will be understood by those of ordinary skill in the art that, it can be to this
The technical solution of utility model is modified or replaced equivalently, should all without departing from the objective and range of the technical program
Cover in the right of the utility model.
Claims (7)
1. a kind of double protection check valves, including valve body (1), which is characterized in that the body cavity is provided with double spool, described
Double spool from the first valve seat (2), the first poppet valve core that are set gradually to the axial direction of oil outlet (P2) along valve body oil inlet (P1)
(3), the second valve seat (5), the second poppet valve core (6), guide sleeve (8) composition, first poppet valve core is by being arranged on it
The thrust of first spring (4) presses in the first valve seat and forms sealing, and second poppet valve core is by being arranged on it
The thrust of two springs (7) presses in the second valve seat and forms sealing.
2. double protection check valve according to claim 1, which is characterized in that first valve seat, is oriented to the second valve seat
The face that plugs of set is inserted into the interior inserting surface formation interference tight fit of body cavity with it.
3. double protection check valves according to claim 2, which is characterized in that the interior inserting surface of the body cavity is equipped with
Three stages (9) for the first valve seat, the second valve seat and guide sleeve to be mounted respectively, three stages along valve body oil inlet to
Axial being radially gradually recessed in valve body of oil outlet.
4. double protection check valve according to claim 1, which is characterized in that on second valve seat, guide sleeve respectively
Equipped with the channel (10) worn for the first poppet valve core, the second poppet valve core.
5. double protection check valve according to claim 4, which is characterized in that first poppet valve core, the second poppet valve core
It plugs face and is inserted into the interior inserting surface formation clearance fit in channel with it.
6. double protection check valve according to claim 1, which is characterized in that first valve seat, the first poppet valve core, the
The axis of two valve seats, the second poppet valve core and guide sleeve is located on an axis.
7. double protection check valve according to claim 1, which is characterized in that first valve seat, the first poppet valve core, the
Two valve seats, the second poppet valve core and guide sleeve are intended to do Surface hardening treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820526060.0U CN208058042U (en) | 2018-04-13 | 2018-04-13 | A kind of double protection check valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820526060.0U CN208058042U (en) | 2018-04-13 | 2018-04-13 | A kind of double protection check valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208058042U true CN208058042U (en) | 2018-11-06 |
Family
ID=63986149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820526060.0U Active CN208058042U (en) | 2018-04-13 | 2018-04-13 | A kind of double protection check valves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208058042U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483687A (en) * | 2020-12-02 | 2021-03-12 | 北京动力机械研究所 | Double-sealing one-way valve |
| CN112728171A (en) * | 2020-12-24 | 2021-04-30 | 江苏凯奥机械制造有限公司 | Petroleum control valve with anti-backflow function |
| CN113864645A (en) * | 2021-08-25 | 2021-12-31 | 上海空间推进研究所 | Blowing system for rail-controlled engine ground test |
-
2018
- 2018-04-13 CN CN201820526060.0U patent/CN208058042U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483687A (en) * | 2020-12-02 | 2021-03-12 | 北京动力机械研究所 | Double-sealing one-way valve |
| CN112728171A (en) * | 2020-12-24 | 2021-04-30 | 江苏凯奥机械制造有限公司 | Petroleum control valve with anti-backflow function |
| CN113864645A (en) * | 2021-08-25 | 2021-12-31 | 上海空间推进研究所 | Blowing system for rail-controlled engine ground test |
| CN113864645B (en) * | 2021-08-25 | 2023-10-13 | 上海空间推进研究所 | Blowing system for ground test of rail control engine |
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