CN108692037A - A kind of pilot-operated type fluid-controlled cut-off valve - Google Patents
A kind of pilot-operated type fluid-controlled cut-off valve Download PDFInfo
- Publication number
- CN108692037A CN108692037A CN201810736150.7A CN201810736150A CN108692037A CN 108692037 A CN108692037 A CN 108692037A CN 201810736150 A CN201810736150 A CN 201810736150A CN 108692037 A CN108692037 A CN 108692037A
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- China
- Prior art keywords
- bushing
- hydraulic fluid
- fluid port
- spool
- valve
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/124—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The present invention relates to a kind of pilot-operated type fluid-controlled cut-off valves, it is characterised in that:Including valve body, third hydraulic fluid port and the 4th hydraulic fluid port are opened on valve body;Valve seat is provided with the first hydraulic fluid port, the second hydraulic fluid port on valve seat;First bushing, the second bushing and spool, spool divide the second bushing inner cavity to oil back chamber and control chamber, and the left and right of spool, which slides, can open and close the first hydraulic fluid port, the first through flow hole in spool, and the first spring is equipped in oil back chamber;First bushing is in ladder shaft-like, and counter balance pocket is formed in the thin axle portion right end of the first bushing;The second through flow hole, third through flow hole are provided on first bushing, the left and right sliding of spool can open and close the first hydraulic fluid port;The first damping hole, the second damping hole are provided on second bushing side wall;Pilot valve component in the axial passage left end of valve body is set, whether the unlatching of pilot valve component whether determines that third hydraulic fluid port is connected to second through flow hole.The present invention has simple and reasonable, the advantage that the low cut-off of manufacturing cost is reliable, volume compact, impact are small.
Description
Technical field
The present invention relates to a kind of shut-off valve more particularly to a kind of pilot-operated type fluid-controlled cut-off valves.
Background technology
Shut-off valve is also pipe valve, is a kind of most popular valve, is mainly used for blocking or connecting various fluids Jie
Matter.Shut-off valve product currently on the market is generally opened and closed using type of drive manually, electrically, pneumatic, hand stop valve
General pressure is higher, reaches as high as 100MPa, but its operation needs people's on-site manual to implement, therefore using has certain limitation;
Although and electric and pneumatic shut-off valve can accomplish remote control operate, due to being driven size, the power limit of element,
So its operating pressure is not generally high, up to 40MPa.In recent years, occur fluid-controlled cut-off valve in the market, may be implemented remote
Distance operation, high-voltage applications, but existing fluid-controlled cut-off valve is mostly direct dynamic structure, that is, fluid control pressure acts on cut-off
It is directly compared with the spring of control cut-off spool closing on spool, it is especially big that this direct dynamic structure, which is suitable for flow not,
Application scenario, being relatively large in diameter using the cut-off spool of direct dynamic structure under big flow application operating mode, needing the work of spring
It is firmly very big, therefore the spring specification designed is all very big, increases the size of shut-off valve on the whole, and because of the work of spring
Firmly big, when fluid control pressure off-load shut-off valve is closed, cut-off spool closing velocity is too fast, on the one hand causes prodigious punching
It hits, on the other hand can reduce the service life of shut-off valve.
Invention content
It is simple and reasonable that one kind is provided the technical problem to be solved by the present invention is to present situation for the above-mentioned prior art,
The compact pilot-operated type fluid-controlled cut-off valve suitable for big flow.
Technical solution is used by the present invention solves above-mentioned technical problem:A kind of pilot-operated type fluid-controlled cut-off valve, feature
It is:Include the valve body with axially extending bore, the third hydraulic fluid port being connected to axially extending bore and the 4th oil are provided on the side wall of valve body
Mouthful;It is fixed on the valve seat of axially extending bore right end, the first hydraulic fluid port being connected to axially extending bore is provided on the right side of valve seat, valve seat
The second hydraulic fluid port being connected to axially extending bore is provided on side wall;First bushing, the second bushing and spool, the first bushing and the second bushing
Be fixed in axially extending bore, spool be set in the second bushing and can left and right slide, the second bushing inner cavity is separated into independence by spool
Oil back chamber and control chamber, the right end of spool be pierced by the second bushing and coordinate with the first hydraulic fluid port, the left and right sliding of spool can open and close
First hydraulic fluid port, is equipped with the first through flow hole for axially penetrating through and being connected to always with the first hydraulic fluid port in spool, in the oil back chamber
Equipped with the first spring, which, which acts on spool and spool holding is made to move to right, blocks the first hydraulic fluid port trend;First
Bushing is in ladder shaft-like, and the right part of the first bushing is inserted into the inner cavity of the second bushing, the big axle portion periphery of the first bushing respectively with
Sealing structure is equipped between axially extending bore and oil return cavity wall, the thin axle portion of the first bushing stretches into the left end of the first through flow hole, the
Sealing structure is equipped between the thin axle portion periphery of one bushing and the first through flow hole, to the of the thin axle portion right end of the first bushing
Counter balance pocket is formed in one through flow hole, oil pressure acts on the first active area of spool right end equal to oil in counter balance pocket in the first hydraulic fluid port
Pressure acts on the second left and right area on spool;The second through flow hole to be connected to third hydraulic fluid port is provided on first bushing, the
It is provided with to be connected to the third through flow hole of oil back chamber and the second through flow hole on the side wall of the thin axle portion of one bushing;Second bushing side wall
On be provided with connection control chamber with the first damping hole of the 4th hydraulic fluid port and be connected to the second damping hole of oil back chamber and the 4th hydraulic fluid port;If
The pilot valve component in the axially extending bore left end of valve body is set, pilot valve component is arranged to:When oil return cavity pressure is less than pilot valve
When the setting pressure of component, pilot valve component closes the second through flow hole, and oil back chamber separates with third hydraulic fluid port;When oil return cavity pressure
More than pilot valve component setting pressure when, pilot valve component opens the second through flow hole, and oil back chamber is connected with third hydraulic fluid port.
Above-mentioned pilot valve component includes pilot valve, spring base, second spring and adjusting rod;Adjusting rod left end is threadedly coupled
In on valve body and stretching out valve body, the right end of adjusting rod is matched with valve body inner bore, and pilot valve is fixedly connected with spring base, and second
Spring one end is against at the step of adjusting rod right end, and the other end, which is against on spring base, makes pilot valve keep moving to right blocking second
Through flow hole trend.
Above-mentioned pilot valve is steel ball, of simple structure and low cost using steel ball as pilot valve.
Compared with the prior art, the advantages of the present invention are as follows:
The break-make of oil back chamber and third hydraulic fluid port is controlled using pilot valve component, the Opening pressure of spool is by second spring tune
Fixed, the closing force of spool is the active force of the first spring, and pilot valve diameter is smaller, can reduce the diameter of second spring
Size, while the first acting force of the spring is only required to close spool and can be impacted when spool is closed small, therefore the present invention answers
No need to increase the diameters of the first spring when for big flow operating mode, and overall dimensions of the invention are compact, and close and impact small, use
Long lifespan.
Description of the drawings
Fig. 1 is the sectional view of the embodiment of the present invention;
Fig. 2 is the hydraulic schematic diagram of the embodiment of the present invention.
Specific implementation mode
Below in conjunction with attached drawing embodiment, present invention is further described in detail.
It is a preferred embodiment of the present invention as shown in Fig. 1~2.
A kind of pilot-operated type fluid-controlled cut-off valve, it is characterised in that:Including
Valve body 1 with axially extending bore 101 is provided with the third hydraulic fluid port C being connected to axially extending bore 101 on the side wall of valve body 1
With the 4th hydraulic fluid port D.
It is fixed on the valve seat 6 of 101 right end of axially extending bore, be connected to axially extending bore 101 is provided on the right side of valve seat 6
One hydraulic fluid port A is provided with the second hydraulic fluid port B being connected to axially extending bore 101 on the side wall of valve seat 6.
First bushing 2, the second bushing 3 and spool 5, the first bushing 2 and the second bushing 3 are fixed in axially extending bore 101, valve
Core 5 be set in the second bushing 3 and can left and right slide, 3 inner cavity of the second bushing is separated into independent oil back chamber 1a and control by spool 5
The right end of chamber 1b, spool 5 are pierced by the second bushing 3 and coordinate with the first hydraulic fluid port A, and the left and right sliding of spool 5 can open and close described first
Hydraulic fluid port A, spool 5 is interior to be equipped with the first through flow hole 51 for axially penetrating through and being connected to always with the first hydraulic fluid port A, is set in the oil back chamber 1a
There is the first spring 4, which, which acts on spool 5 and the holding of spool 5 is made to move to right, blocks the first hydraulic fluid port A trend.
First bushing 2 is in ladder shaft-like, and the right part of the first bushing 2 is inserted into the inner cavity of the second bushing 3, the first bushing 2
Big axle portion periphery is equipped with sealing structure between axially extending bore 101 and oil back chamber 1a inner walls respectively, and the thin axle portion of the first bushing 2 is stretched
Enter the left end of the first through flow hole 51, sealing structure is equipped between the thin axle portion periphery and the first through flow hole 51 of the first bushing 2, to
Oil pressure in counter balance pocket 5a, the first hydraulic fluid port A, which is formed, in the first through flow hole 51 of the thin axle portion right end of the first bushing 2 acts on spool
First active area D2 of 5 right ends is equal to oil pressure in counter balance pocket 5a and acts on the second left and right area D1 on spool 5.
The second through flow hole 21 to be connected to third hydraulic fluid port C is provided on first bushing 2, the thin axle portion of the first bushing 2
It is provided with to be connected to the third through flow hole 22 of oil back chamber 1a and the second through flow hole 21 on side wall.
The the first damping hole 3a and connection oil back chamber of connection control chamber 1b and the 4th hydraulic fluid port D are provided on second bushing, 3 side wall
The second damping hole 3b of 1a and the 4th hydraulic fluid port D.
Pilot valve component 7 in 101 left end of axially extending bore of valve body 1 is set, pilot valve component 7 include pilot valve 71,
Spring base 72, second spring 73 and adjusting rod 74;Pilot valve 71 is steel ball, and 74 left end of adjusting rod is threadedly connected on valve body 1
And valve body 1 is stretched out, and the right end of adjusting rod 74 is matched with 1 endoporus of valve body, and pilot valve 71 is fixedly connected with spring base 72, and second
73 one end of spring is against at the step of 74 right end of adjusting rod, and the other end, which is against on spring base 72, makes the holding of pilot valve 71 move to right envelope
Block 21 trend of the second through flow hole.When pressure is less than the setting pressure of second spring 73 in oil back chamber 1a, pilot valve
71 close the second through flow hole 21, and oil back chamber 1a separates with third hydraulic fluid port C;When pressure is more than setting for second spring 73 in oil back chamber 1a
When constant-pressure, pilot valve 71 opens the second through flow hole 21, and oil back chamber 1a is connected with third hydraulic fluid port C.
The operation principle and process of this shut-off valve is as follows:
In application, the 4th hydraulic fluid port D is connected to fluid control pressure oil phase, third hydraulic fluid port C is connected with fuel tank.
When the 4th hydraulic fluid port D is in unloading condition or relatively low pressure, under the active force of second spring 73,72 band of spring base
Dynamic pilot valve 71, which moves right, separates the second through flow hole 21, and the fluid of oil back chamber 1a can not be flowed out via third hydraulic fluid port C, the
The fluid of four hydraulic fluid port D enters oil back chamber 1a by the second damping hole 3b, while the fluid of the 4th hydraulic fluid port D passes through the first through flow hole 3a
Into control chamber 1b;Because the fluid of oil back chamber 1a, without flowing, the pressure of oil back chamber 1a and control chamber 1b are equal, oil back chamber
The pressure of 1a and the pressure of control chamber the 1b generated active force on spool 5 balance each other, effect of the spool 5 in the first spring 4
Power moves to right, and closes the first hydraulic fluid port A, the first hydraulic fluid port A and the second hydraulic fluid port B and is in cut-off state.Because the pressure of the second hydraulic fluid port B is in spool
Without active area on 5, therefore the pressure of the second hydraulic fluid port B does not have an impact the unlatching of spool 5;And the first hydraulic fluid port A acts on valve
It generates thrust to the left on first active area D1 of core 5, while the is acted on into counter balance pocket 5a by the first through flow hole 51
Thrust to the right is generated on two active area D2, because of the first the second left and right areas of active area D1=D2, the first hydraulic fluid port A
Pressure to the force balance of spool 5, spool 5 only by the active force of the first spring 4, no matter the first hydraulic fluid port A, the second hydraulic fluid port B
How pressure changes, and spool 5 can reliably be in cut-off state.
When the 4th hydraulic fluid port D pressure rises to the setting pressure of second spring 73, pilot valve 71 moves downward opening
The fluid of two through flow holes 21, oil back chamber 1a returns to third hydraulic fluid port C through the second through flow hole 21, due to the effect of the second damping hole 3b,
Control chamber 1b and oil back chamber 1a produces pressure difference, pressure difference of the main valve plug 5 in control chamber 1b and oil back chamber 1a when fluid flows
Under the action of open, the first hydraulic fluid port A and the second hydraulic fluid port B conductings.
When the 4th hydraulic fluid port D pressure drops below the Opening pressure of pilot valve component 7 by elevated pressures, pilot valve 71
Close the second through flow hole 21, the pressure of oil back chamber 1a and control chamber 1b are equal, spool 5 under the active force of the first spring 4 to the right
Movement is closed.Because the closing of spool 5 is driven by the first spring 4,4 active force of the first spring is small, therefore spool 5 closes speed per hour
Degree mitigates, and impact is small.
Claims (3)
1. a kind of pilot-operated type fluid-controlled cut-off valve, it is characterised in that:Including
Valve body (1) with axially extending bore (101) is provided with the third oil being connected to axially extending bore (101) on the side wall of valve body (1)
Mouth (C) and the 4th hydraulic fluid port (D);
It is fixed on the valve seat (6) of axially extending bore (101) right end, is provided on the right side of valve seat (6) and is connected to axially extending bore (101)
The first hydraulic fluid port (A), be provided with the second hydraulic fluid port (B) being connected to axially extending bore (101) on the side wall of valve seat (6);
First bushing (2), the second bushing (3) and spool (5), the first bushing (2) and the second bushing (3) are fixed on axially extending bore
(101) in, spool (5) be set in the second bushing (3) and can left and right slide, the second bushing (3) inner cavity is separated into solely by spool (5)
The right end of vertical oil back chamber (1a) and control chamber (1b), spool (5) is pierced by the second bushing (3) and coordinates with the first hydraulic fluid port (A), valve
The left and right sliding of core (5) can open and close first hydraulic fluid port (A), spool (5) it is interior equipped with axially penetrate through and always with the first hydraulic fluid port (A)
The first through flow hole (51) of connection, the oil back chamber (1a) is interior to be equipped with the first spring (4), which acts on spool
(5) and spool (5) is made to keep moving to right blocking the first hydraulic fluid port (A) trend;
First bushing (2) is in ladder shaft-like, and the right part of the first bushing (2) is inserted into the inner cavity of the second bushing (3), the first bushing
(2) big axle portion periphery is equipped with sealing structure, the first bushing between axially extending bore (101) and oil back chamber (1a) inner wall respectively
(2) thin axle portion stretches into the left end of the first through flow hole (51), and the thin axle portion periphery of the first bushing (2) and the first through flow hole (51) are left
Sealing structure is equipped between the inner wall at end, to be formed in the first through flow hole (51) of the thin axle portion right end of the first bushing (2)
Counter balance pocket (5a), oil pressure acts on first active area (D2) of spool (5) right end and is equal to counter balance pocket (5a) in the first hydraulic fluid port (A)
Interior oil pressure acts on the second left and right area (D1) on spool (5);
The second through flow hole (21) to be connected to third hydraulic fluid port (C), the thin axis of the first bushing (2) are provided on first bushing (2)
It is provided with to be connected to the third through flow hole (22) of oil back chamber (1a) and the second through flow hole (21) on the side wall in portion;
It is provided with connection control chamber (1b) on second bushing (3) side wall and the first damping hole (3a) of the 4th hydraulic fluid port (D) and is connected to back
The second damping hole (3b) of oil pocket (1a) and the 4th hydraulic fluid port (D);
Pilot valve component (7) in axially extending bore (101) left end of valve body (1) is set, and pilot valve component (7) is arranged to:When return
When oil pocket (1a) interior pressure is less than the setting pressure of pilot valve component (7), pilot valve component (7) closes the second through flow hole (21),
Oil back chamber (1a) separates with third hydraulic fluid port (C);When oil back chamber (1a) interior pressure is more than the setting pressure of pilot valve component (7),
Pilot valve component (7) opens the second through flow hole (21), and oil back chamber (1a) is connected with third hydraulic fluid port (C).
2. pilot-operated type fluid-controlled cut-off valve according to claim 1, it is characterised in that:The pilot valve component (7) includes first
Guide valve core (71), spring base (72), second spring (73) and adjusting rod (74);Adjusting rod (74) left end is threadedly connected to valve body
(1) on and valve body (1) is stretched out, the right end of adjusting rod (74) is matched with valve body (1) endoporus, pilot valve (71) and spring base
(72) it is fixedly connected, second spring (73) one end is against at the step of adjusting rod (74) right end, and the other end is against spring base (72)
On so that pilot valve (71) holding is moved to right and is blocked the second through flow hole (21) trend.
3. pilot-operated type fluid-controlled cut-off valve according to claim 2, it is characterised in that:The pilot valve (71) is steel ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810736150.7A CN108692037B (en) | 2018-07-06 | 2018-07-06 | Pilot-operated type hydraulic control stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810736150.7A CN108692037B (en) | 2018-07-06 | 2018-07-06 | Pilot-operated type hydraulic control stop valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108692037A true CN108692037A (en) | 2018-10-23 |
| CN108692037B CN108692037B (en) | 2021-06-04 |
Family
ID=63851408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810736150.7A Active CN108692037B (en) | 2018-07-06 | 2018-07-06 | Pilot-operated type hydraulic control stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108692037B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158697A (en) * | 2019-06-14 | 2019-08-23 | 江苏徐工工程机械研究院有限公司 | Signal cut valve and hydraulic control system |
| CN111594566A (en) * | 2020-05-19 | 2020-08-28 | 常州普宸电子有限公司 | Damping valve |
| CN113623350A (en) * | 2021-08-12 | 2021-11-09 | 常州普宸电子有限公司 | Built-in adjustable electromagnetic valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158697A (en) * | 2019-06-14 | 2019-08-23 | 江苏徐工工程机械研究院有限公司 | Signal cut valve and hydraulic control system |
| CN110158697B (en) * | 2019-06-14 | 2024-04-30 | 江苏徐工工程机械研究院有限公司 | Signal cut-off valve and hydraulic control system |
| CN111594566A (en) * | 2020-05-19 | 2020-08-28 | 常州普宸电子有限公司 | Damping valve |
| CN113623350A (en) * | 2021-08-12 | 2021-11-09 | 常州普宸电子有限公司 | Built-in adjustable electromagnetic valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108692037B (en) | 2021-06-04 |
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