CN205858833U - A kind of choke valve - Google Patents
A kind of choke valve Download PDFInfo
- Publication number
- CN205858833U CN205858833U CN201620868639.6U CN201620868639U CN205858833U CN 205858833 U CN205858833 U CN 205858833U CN 201620868639 U CN201620868639 U CN 201620868639U CN 205858833 U CN205858833 U CN 205858833U
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- Prior art keywords
- spool
- valve
- valve seat
- hole
- choke valve
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Abstract
The utility model discloses a kind of choke valve, including the valve body with inlet and liquid outlet, the two ends of valve body are respectively provided with left end cap and right end cap, be additionally provided with in valve body the admission chamber communicated with inlet and communicate with liquid outlet go out sap cavity, the valve port of institute's valve seat is two stage steps structure；Arranging inner spool and outer spool, described inner spool and outer spool in going out sap cavity all with endoporus, both endoporus are oppositely arranged to form intermediate cavity, arrange spring in intermediate cavity, and the two ends of this spring are connected with inner spool and outer spool by spring base respectively.Choke valve disclosed in the utility model, the valve port of valve seat is two stage steps structure, fluid pressure is less can not overcome spring force time, first order restriction is closed, and this choke valve is equivalent to an one-level choke valve, and when fluid pressure exceedes spring force, inner spool slides along the endoporus outside spool direction of outer spool, first order restriction is opened, and second level restriction is started working, and this choke valve becomes two-step throttle valve.
Description
Technical field
This utility model belongs to the flow control element field in hydraulic system, particularly to a kind of throttling in this field
Valve.
Background technology
Choke valve is by changing orifice size or the chock length valve with control fluid flow, is normal in hydraulic system
Flow control element.It is used together with electromagnetism unloading overflow valve, can realize merits such as pump loading, off-load and system speed governing
Energy.During work, choke valve cuts out, by regulation electromagnetic relief valve, make hydraulic pump works under declared working condition.Then joint is regulated
Stream valve, makes hydraulic pump works under a certain pressure.
Common single-stage choke valve does not has flow negative feedback function, in spool position one timing, by flow and valve port
The pressure reduction at two ends is relevant, it is impossible to compensate the speed caused due to load change unstable.In common single-stage choke valve, due to
At restriction, flow velocity is higher, when flow field local pressure is less than the vapor pressure of medium, cavitation will occur, make at valve port
Material by cavitation erosion, thus reduce functional reliability and the life-span of valve.In hydraulic system, multipurpose oil is working media,
And when choke valve uses in water (including sea water, fresh water etc.) medium, owing to the vapor pressure of water is significantly larger than mineral oil, more
It is susceptible to cavitation erosion and wire drawing is corroded.
In order to solve the problems referred to above, prior art develops a kind of two-step throttle valve mouth structure pattern, what is called two grades
Throttling is exactly that a throttle point has two restrictions, and two restriction rigid-tandem get up, and jointly share restriction two ends
Pressure reduction, reduces cavitation erosion and the purpose of wire drawing erosion.But this throttle-valve structure is more complicated, to spool and the processing of valve seat
Precision and assembly precision require the highest, and two-stage valve port flow area ratio is fixing, and cavitation resistive property is limited.
Utility model content
Technical problem to be solved in the utility model be just to provide a kind of simple in construction, assembly precision requirement relatively low and
The choke valve that two-stage flow area is variable.
This utility model adopts the following technical scheme that
A kind of choke valve, including the valve body with inlet and liquid outlet, the two ends of valve body are respectively provided with left end cap and the right side
End cap, it thes improvement is that: be additionally provided with in valve body the admission chamber communicated with inlet and communicate with liquid outlet go out sap cavity,
Installing the valve seat of band cavity in described admission chamber, the hole on valve seat makes valve seat cavity communicate with admission chamber, and the valve port of valve seat is
Two stage steps structure, and the big bench port of valve seat stretches into out in sap cavity；Arranging inner spool and outer spool in going out sap cavity, described is interior
Spool and outer spool are all with endoporus, and both endoporus are oppositely arranged to form intermediate cavity, arrange spring in intermediate cavity, this spring
Two ends be connected with inner spool and outer spool by spring base respectively；The head of above-mentioned inner spool is the conical surface, at spring force
Effect under this conical surface push against valve seat small stair mouth, the afterbody of inner spool stretches into and makes the inner spool can be along outer valve in the endoporus of outer spool
The endoporus of core slides, and the head of this external inner spool has the hole communicated with its endoporus, and the afterbody of inner spool is offered big with valve seat
The groove that cavity between bench port and valve seat small stair mouth communicates；The head bench port big with valve seat of above-mentioned outer spool coordinates composition
Restriction, the afterbody of outer spool is connected with the adjusting handle being arranged on right end cap, rotates adjusting handle and makes outer spool relative
The big bench port of valve seat moves to change the openings of sizes of restriction.
Further, the hole on valve seat is two or more, and each hole is radially uniformly distributed.
Further, the groove of inner spool afterbody is two or more, and each groove is radially uniformly distributed.
Further, described groove is triangular groove or wedge-shaped slot, and the degree of depth of groove is gradually become shallower as to head by afterbody.
Further, the head at inner spool installs damping plug, damping plug has damping hole, this damping hole and inner spool
Endoporus communicate.
Further, hole is had outside on spool to connect the cavity between outer spool endoporus and outer spool and right end cap.
Further, described hole is inclined hole；The quantity in hole is two or more, and each hole is radially uniformly distributed.
Further, described adjusting handle is threaded connection with right end cap.
Further, between left and right end cap and valve body, between valve seat and valve body, and between outer spool and right end cap
It is provided with sealing ring.
Further, the connected mode between other element of hydraulic system and choke valve inlet and liquid outlet is board-like company
Connect.
The beneficial effects of the utility model are:
Choke valve disclosed in the utility model, the valve port of valve seat is two stage steps structure, and the head conical surface of inner spool exists
Pushing against valve seat small stair mouth under the effect of spring force and constitute first order restriction, the head of outer spool bench port big with valve seat is joined
Close and constitute second level restriction, fluid pressure is less can not overcome spring force time, first order restriction closes, this choke valve
Be equivalent to an one-level choke valve, and when fluid pressure exceedes spring force, inner spool is along the outside spool of endoporus of outer spool
Sliding in direction, first order restriction is opened, and second level restriction is started working, and this choke valve becomes two-step throttle valve.This two
Level restriction structure not only can be effectively improved the job stability of choke valve, also can be automatically adjusted two-stage according to operating pressure
The flow area ratio of restriction, thus reduce the probability issuing angry erosion in high-pressure situations, it is suitable at the medium such as mineral oil, water
Environment works.
Spool is divided into inner spool and outer spool, arranges spring in the intermediate cavity between two spools, utilizes the elastic force of spring
Effect makes the head conical surface and the valve seat small stair mouth good contact of inner spool, with common two-step throttle spool of the prior art
Compare and reduce processing and assembly precision requirement, reduce the probability that cavitation erosion occurs.
Choke valve disclosed in the utility model, has hole outside to connect outer spool endoporus and outer spool with right on spool
Cavity between end cap, plays pressure release effect can the spool axial force that caused by pressure reduction of balance portion.At left and right end cap and valve
Between body, between valve seat and valve body, and it is provided with sealing ring between outer spool and right end cap, in order to prevent internal and outernal leakage.
Choke valve disclosed in the utility model, groove is triangular groove or wedge-shaped slot, and the degree of depth of groove by afterbody to head
Gradually become shallower as, it is simple to guide liquid to flow into the cavity between the big bench port of valve seat and valve seat small stair mouth from intermediate cavity.
Accompanying drawing explanation
Fig. 1 is the structural representation of the choke valve disclosed in this utility model embodiment 1；
Fig. 2 is the structural representation of inner spool afterbody groove in the choke valve disclosed in this utility model embodiment 1.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.Should be appreciated that specific embodiment described herein is only in order to explain
This utility model, is not used to limit this utility model.
Embodiment 1, as it is shown in figure 1, present embodiment discloses a kind of choke valve, including with inlet P's and liquid outlet O
Valve body 1, the two ends of valve body 1 are respectively provided with left end cap 2 and right end cap 3, alternatively, at the present embodiment
In, use bolt to fix between left end cap 2 and right end cap 3 with valve body 1 and be connected.It is additionally provided with in valve body 1 and communicates with inlet P
Admission chamber 4 and communicate with liquid outlet O go out sap cavity 5, the valve seat 7 of band cavity 6, the hole on valve seat 7 are installed in described admission chamber 4
8 make valve seat cavity 6 communicate with admission chamber 4, and alternatively, the hole 8 on valve seat 7 is four in the present embodiment
Individual, each hole 8 is decussation distribution along the radial direction of valve seat 7.The valve port of valve seat 7 is two stage steps structure, can as one
Selective mode, two stage steps structure in the present embodiment is the ring-shaped step hole of two grades, and the big bench port of valve seat 9
Stretch into out in sap cavity 5.Inner spool 10 and outer spool 11 are set in going out sap cavity 5, described inner spool 10 and outer spool 11 all with
Endoporus, both endoporus are oppositely arranged to form intermediate cavity 12, arrange spring 13 in intermediate cavity 12, and the two ends of this spring 13 are respectively
It is connected with inner spool 10 and outer spool 11 by spring base 14；The head of above-mentioned inner spool 10 is the conical surface, at spring 13 elastic force
Effect under this conical surface push against valve seat small stair mouth 15 and constitute first order restriction, the afterbody of inner spool 10 stretches into outer spool 11
Making inner spool 10 can slide along the endoporus of outer spool 11 in endoporus, in the present embodiment, head refers to the portion close to left end cap 2
Point, and afterbody refers to the part close to right end cap 3.The head of this external inner spool 10 has the hole 16 communicated with its endoporus, makees
For a kind of alternative, in the present embodiment, the head at inner spool 10 installs damping plug, and damping plug has damping
Hole 16, this damping hole 16 communicates with the endoporus of inner spool 10.As in figure 2 it is shown, the afterbody of inner spool 10 offers step big with valve seat
The groove 18 that cavity 17 between mouth 9 and valve seat small stair mouth 15 communicates, alternatively, at the present embodiment
In, the groove 18 of inner spool afterbody is plural triangular groove or wedge-shaped slot, and the degree of depth of groove is gradually become to head by afterbody
Shallow, each groove 18 is radially uniformly distributed.The head bench port big with valve seat 9 of above-mentioned outer spool 11 coordinates composition second level joint
Head piece, the afterbody of outer spool 11 is connected with the adjusting handle 19 being arranged on right end cap 3, rotates adjusting handle 19 and makes outer spool
The 11 big bench ports of opposite valve seat 9 move to change the openings of sizes of second level restriction.Hole 20 is had outside with even on spool 11
Connect the cavity 21 between outer spool endoporus and outer spool 11 and right end cap 3.Described hole 20 is inclined hole；The quantity in hole 20 is two
Above, each hole 20 is radially uniformly distributed.Described adjusting handle is threaded connection with right end cap.
Alternatively, in the present embodiment, between left and right end cap and valve body, valve seat and valve body
Between, and it is provided with sealing ring between outer spool and right end cap.Other element of hydraulic system and choke valve inlet and go out
Connected mode between liquid mouth is board-like connection.
The work process of the choke valve disclosed in the present embodiment is: the liquid of hydraulic system such as mineral oil, sea water or
Fresh water enters the admission chamber 4 of valve body 1 through inlet P, then the hole 8 on valve seat 7 enters valve seat cavity 6, less at fluid pressure
When can not overcome spring 13 elastic force, the head conical surface of inner spool 10 pushes against valve seat small stair mouth under the effect of spring 13 elastic force
15, first order restriction is closed, and this choke valve is equivalent to an one-level choke valve, and now liquid is through inner spool 10 head damping plug
On damping hole 16 flow into intermediate cavity 12, with after flow into the big bench port of valve seat through triangular groove or the wedge-shaped slot 18 of inner spool 10 afterbody
Cavity 17 between 9 and valve seat small stair mouth 15, after coordinate, through the head bench port big with valve seat 9 of outer spool 11, the constituted
Two-step throttle mouth flows into out sap cavity 5, flows out valve body 1 through liquid outlet O.And when fluid pressure exceedes spring 13 elastic force, inner spool
10 slide along endoporus outside spool 11 direction of outer spool 11, and first order restriction opens, and now liquid is except flowing through above-mentioned path
Go out outside valve body 1, it is also possible to directly flow into out sap cavity 5 through second level restriction, flow out valve body 1 through liquid outlet O, in the case should
Choke valve becomes two-step throttle valve.This two-step throttle mouth structure not only can be effectively improved the job stability of choke valve, also
The flow area ratio of two-stage restriction according to operating pressure, can be automatically adjusted, thus reduce and issue angry erosion in high-pressure situations
Probability, is suitable for working in the media environments such as mineral oil, sea water or fresh water.
Claims (10)
1. a choke valve, including the valve body with inlet and liquid outlet, the two ends of valve body are respectively provided with left end cap and right-hand member
Lid, it is characterised in that: be additionally provided with in valve body the admission chamber communicated with inlet and communicate with liquid outlet go out sap cavity, described
Installing the valve seat of band cavity in admission chamber, the hole on valve seat makes valve seat cavity communicate with admission chamber, and the valve port of valve seat is two grades of platforms
Stage structure, and the big bench port of valve seat stretches into out in sap cavity；Inner spool and outer spool be set in going out sap cavity, described inner spool and
Outer spool is all with endoporus, and both endoporus are oppositely arranged to form intermediate cavity, arrange spring in intermediate cavity, the two ends of this spring
It is connected with inner spool and outer spool by spring base respectively；The head of above-mentioned inner spool is the conical surface, in the effect of spring force
This conical surface lower pushes against valve seat small stair mouth, and the afterbody of inner spool stretches into and makes the inner spool can be along outer spool in the endoporus of outer spool
Sliding in hole, the head of this external inner spool has the hole communicated with its endoporus, and the afterbody of inner spool offers bench port big with valve seat
And the groove that the cavity between valve seat small stair mouth communicates；The head bench port big with valve seat of above-mentioned outer spool coordinates composition throttling
Mouthful, the afterbody of outer spool is connected with the adjusting handle being arranged on right end cap, rotates adjusting handle and makes outer spool opposite valve seat
Big bench port moves to change the openings of sizes of restriction.
Choke valve the most according to claim 1, it is characterised in that: the hole on valve seat is two or more, radially side, each hole
To being uniformly distributed.
Choke valve the most according to claim 1, it is characterised in that: the groove of inner spool afterbody is two or more, and each groove is along footpath
It is uniformly distributed to direction.
Choke valve the most according to claim 3, it is characterised in that: described groove is triangular groove or wedge-shaped slot, and groove
The degree of depth is gradually become shallower as to head by afterbody.
Choke valve the most according to claim 1, it is characterised in that: the head at inner spool installs damping plug, on damping plug
Having damping hole, this damping hole communicates with the endoporus of inner spool.
Choke valve the most according to claim 1, it is characterised in that: have on spool outside hole with connect outer spool endoporus with
Cavity between outer spool and right end cap.
Choke valve the most according to claim 6, it is characterised in that: described hole is inclined hole；The quantity in hole is two or more,
Each hole is radially uniformly distributed.
Choke valve the most according to claim 1, it is characterised in that: described adjusting handle is with right end cap by screw thread even
Connect.
Choke valve the most according to claim 1, it is characterised in that: between left and right end cap and valve body, valve seat and valve body it
Between, and it is provided with sealing ring between outer spool and right end cap.
Choke valve the most according to claim 1, it is characterised in that: other element of hydraulic system and choke valve inlet and
Connected mode between liquid outlet is board-like connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620868639.6U CN205858833U (en) | 2016-08-11 | 2016-08-11 | A kind of choke valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620868639.6U CN205858833U (en) | 2016-08-11 | 2016-08-11 | A kind of choke valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205858833U true CN205858833U (en) | 2017-01-04 |
Family
ID=57593867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620868639.6U Active CN205858833U (en) | 2016-08-11 | 2016-08-11 | A kind of choke valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205858833U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015151A (en) * | 2016-08-11 | 2016-10-12 | 中国海洋大学 | Throttle valve |
| CN108894760A (en) * | 2018-09-03 | 2018-11-27 | 中国石油集团川庆钻探工程有限公司 | A kind of gas well liquid loading valve pipe mating type underground throttle device and its application method |
-
2016
- 2016-08-11 CN CN201620868639.6U patent/CN205858833U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015151A (en) * | 2016-08-11 | 2016-10-12 | 中国海洋大学 | Throttle valve |
| CN108894760A (en) * | 2018-09-03 | 2018-11-27 | 中国石油集团川庆钻探工程有限公司 | A kind of gas well liquid loading valve pipe mating type underground throttle device and its application method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |