CN201739535U - Pneumatic electric stop unloading valve - Google Patents
Pneumatic electric stop unloading valve Download PDFInfo
- Publication number
- CN201739535U CN201739535U CN2010201827377U CN201020182737U CN201739535U CN 201739535 U CN201739535 U CN 201739535U CN 2010201827377 U CN2010201827377 U CN 2010201827377U CN 201020182737 U CN201020182737 U CN 201020182737U CN 201739535 U CN201739535 U CN 201739535U
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- valve
- valve seat
- vertical axis
- spool
- axis hole
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Abstract
The utility model relates to a pneumatic electric stop unloading valve which solves the problems that the existing stop unloading valve has poor sealing and regulating performances, and short service life. A valve body (4) is provided with a coaxial stressed rod (1), a valve core (3), and a valve seat (5), the upper end of the valve seat (5) is connected with a flange at the upper end of the valve core (3) by a small spring (2), the lower end of the valve seat (5) is connected with an unloading joint (8) or the valve body by a large spring (7), the valve seat (5) is provided with upper and lower vertical shaft holes and a horizontal hole, the upper and lower vertical shafts are communicated, the diameter of the upper vertical shaft hole is larger than that of the lower vertical shaft hole, the upper end of the valve core (3) is connected with the stressed rod, the lower end of the valve core (3) penetrates through the upper vertical shaft hole, the conical surface at the lower end is matched with the conical surface of the lower vertical shaft hole in a sealing manner, the upper end of the lower vertical shaft hole is connected with an inlet joint (6) by the horizontal hole, and the lower end of the lower vertical shaft hole is connected with the unloading joint (8).
Description
Technical field:
The utility model be used for the relevant of high pressure, big flow water jet by unloading valve.
Background technique:
A kind of for by unloading valve of the current-intercepting switch of existing high pressure (0-100MPa), big flow (6-25m3/h) water jet can be applicable to that the sealing of accumulator (or high pressure pipe line) relief port is blocked or the drainage of MEDIA FLOW.Add force application mechanism (as the cylinder of electromagnetic valve) effect outside down, can realize the automatic deloading function of high pressure sealing container.
Tradition adopts cone valve to seal firmly by unloading valve, applies external force on spool, and spool is acted directly on the valve seat, the working principle schematic representation as shown in Figure 1:
The open-shut device of stop valve is the spool (ending spool as Fig. 1) of taper, and sealing surface is the plane or the conical surface, and most of high pressure adopt conical surface seal by unloading valve.The center line moving linearly of spool longshore current body.The forms of motion of valve rod be handwheel with the valve rod rotation and lifting, nut is located on the valve body.Stop valve is applicable to standard-sized sheet and complete shut-down MEDIA FLOW to passage, does not do to regulate and the throttling use.
Stop valve belongs to forced seal formula valve, so when valve closing, must exert pressure to spool, does not leak with forced seal face.Applied external force acts directly on the valve seat by spool, and the valve line of valve seat own is actual to be a trickle contact anchor ring, is commonly referred to as the sealing valve face, the passive direct active force that bears spool to it of valve face.Both generation extruding forces that interact will seal stress surface and tightly fit together, and form sealing surface, when sealing surface is unreliable, need further to increase apply external force.
When medium enters valve channel by the spool below, the required resistance that overcomes of operated by handwheel power is the frictional force of valve rod and filler and by the thrust that pressure produced of medium, and the power that the force rate of closing valve is opened valve is big, so it is big that the diameter of valve rod is wanted, otherwise the fault of valve rod bending can take place.After the soft rubber sealing material was applied to the seal valve class, the MEDIA FLOW of stop valve entered valve pocket to just changing by spool top, and at this moment under the pressure medium effect, the power of closing valve is little, and it is big to open the power of valve, and the diameter of valve rod can correspondingly reduce.Simultaneously, under the medium effect, the valve seal of this form is also tighter.
When stop valve was opened, the Lift of spool was 25% of nominal diameter～30% o'clock, and it is maximum that flow can reach, and the expression valve has reached fully open position.So the fully open position of stop valve should be decided by the stroke of spool.
Stop valve has the following advantages: good airproof performance, and simple in structure, make and keep in repair more convenient; Working stroke is little, and opening and closing time is short.
The shortcoming of stop valve is as follows: fluid resistance is big, and required power is bigger during opening and closing; Adjusting function is relatively poor.Spool, valve seat life-span are shorter.
The quality of stop valve spool, valve seat quality of processing, heat treatment process all can directly influence sealability and working life.Because sealing surface of seat can only passively be accepted the impact of active force, frequently apply reciprocating power and can cause the distortion of valve seat valve face, finally influence sealability.
Existing pneumoelectric ends the unloading valve valve as shown in Figure 2, and application of force cylinder makes flexible push rod move up and down under action of gas source, drives by the generation of off-load main valve valve rod and moves, and main valve is closed.During off-load, cylinder moves upward, the stressed disappearance of valve rod, and spool is opened under hydraulic coupling is impacted automatically.Sealing is poor, and working life is short.
The model utility content:
The purpose of this utility model provides a kind of simple in structure, and sealing and adjusting function are good, and the pneumoelectric control of long service life is by unloading valve.
The utility model is achieved in that
The control of the utility model pneumoelectric is by unloading valve, coaxial force rod 1 is arranged on the valve body 4, spool 3, valve seat 5, valve seat 5 upper ends are connected with spool 3 upper flanges by little spring 2, valve seat 5 lower ends are connected with off-load joint 8 or valve body by big spring 7, valve seat 5 have communicate on, following vertical axis hole and horizontal hole, last vertical axis bore dia is greater than following vertical axis bore dia, spool 3 upper ends are connected with force rod, vertical axis hole is passed in the lower end, the lower end conical surface is sealed and matched with the conical surface of following vertical axis hole, down vertical axis hole upper end links to each other with inlet union 6 by horizontal hole, and following vertical axis hole lower end links to each other with off-load joint 8.
The diameter of phi D of vertical axis hole place section is greater than the diameter of phi d of following vertical axis hole place section on the valve seat 5, and horizontal hole is positioned at two sections intersection and runs through valve seat and is communicated with the cavity around valve seat of valve body 4.
When imported hydraulic power Pi=0, spool 3 has distance with the final position that relative valve body after valve seat 5 is subjected to external force moves downward apart from off-load joint 8 upper-end surfaces.
The pneumoelectric control is mainly by unloading valve and solves conventionally by unloading valve valve seat, seal spool poor performance, and the life-span is too short and design.Main feature is can be in quick condition under valve seat, the spool stressing conditions.When valve seat is subjected to the spool impact forces, slow down the sealing valve face stressed momentum that interacts, when hydraulic coupling exists, the sealing surface force-bearing situation is increased with hydraulic coupling, seal more reliable.
The utility model is except the advantage with normal conventional stop valve, utilization is to the novel unique design of valve seat, solved stressed relation between unloading valve spool, the valve seat well, strengthened the sealing force between both sealing surfaces under the high pressure, sealing force is increased with the rising of hydraulic coupling, overcome the stressed valve face of traditional conventional seat of stop valve because of only being subjected to the effect of a direction external force to cause the shortcoming of seal valve face seal poor performance merely, when being applied in fluid pipe or seal of vessel, sealability greatly improves, and helps prolonging the working life of spool, valve seat.
The pneumoelectric control imposes automation control by unloading valve in application, can realize remote-controlled operation, and is easy to operate, increases Safety performance.Can increase work efficiency greatly, very big application prospect is arranged.
Description of drawings:
Fig. 1 is the existing unloading valve schematic representation that ends.
Fig. 2 ends the unloading valve schematic representation for existing pneumoelectric.
Fig. 3 is the utility model original state schematic representation.
Fig. 4 is the utility model stress schematic representation.
Fig. 5 is valve seat construction figure.
Embodiment:
Coaxial force rod 1, guide sleeve 9 are arranged on the valve body 4 of the present utility model, spool 3, valve seat 5, off-load joint 8, valve seat 5 upper ends are connected with little spring 2, and the lower end is connected with big spring 7, valve seat 5 is that the boundary is divided into upper and lower section by horizontal hole, and horizontal hole is connected with off-load joint 8 with cavity on the valve body.
Do not have external force when the unloading valve original state and be added on the force rod 1 and make F=0, valve import aneroid pressure P i=0 (adopt in the stop valve liquid from the type of sealed mouth top feed liquor).
When the unloading valve original state, when if the movable position of valve seat is in spacing of below, because force rod does not apply external force, valve imported hydraulic power is zero, the directed force F that this moment, valve seat 5 was made progress by valve seat below big spring 7 is big=105N, be subjected to the downward directed force F of valve seat top little spring 2 little=85N, valve seat 5 is subjected to upwards force action with the generation trend (seal ring surface friction drag and beaer quality are ignored than I) that moves upward, and valve seat 5 moves to the top and stopped on the initial position by guide sleeve 9 end face position-limiting actions.
When on force rod, applying a stable external force F1 (F1 is much larger than making a concerted effort that valve seat is subjected to making progress), the then relative movement of spool 3 generation downwards and valve seat, when spool 3 lower end conical surfaces contact with valve seat 5 taper valve faces, applied external force overcomes the spring that valve seat 5 is subjected to and makes a concerted effort and frictional force, the relative movement of generation and valve body is down to the working state position, do not having hydraulic coupling Pi=0 to do the time spent, valve seat is stable to be stopped at from off-load joint 8 tops, keeps at a certain distance away with off-load joint 8.
The utility model is compared by unloading valve with routine, and two place's unique features are arranged;
At first, in design during the utility model, spool, valve seat be subjected to external force after (Pi=0 this moment) with respect to design certain position place above off-load joint 8, final position that valve body moves downward, avoid valve seat to be subjected to bigger rigidity active force.When valve seat moves downward in original state, can compress the bottom big spring and be subjected to the reverse reaction force that spring makes progress, stressedly when valve seat moves downward have certain elastic buffer time, avoid valve seat because of being subjected to the direct effect of external force momentum, make the stressed valve face of valve seat be subjected to moment rigidity extruding and produce distortion and destroy sealing surface.This moment, external force F1 was as increasing again, force rod 1 can all enter guide sleeve, the unnecessary external force that continues to increase will act directly on the valve body, by valve body unnecessary external force is transferred on the supporting frame, so both can allow location, valve seat motion back be restricted, can avoid again because of being subjected to excessive external force not have buffer time damage valve face, can prolong valve seat working life.This structure makes valve in when work, seemingly as floating in valve body, rather than resembles the conventional stop valve by the directed to-and-fro motion of spool, can only rely on folk prescription to come seal valve line face to increase spool active force.
Secondly, when the design valve seat, hydraulic coupling Pi in the flow channels is used.
During design the medium liquid entering hole is designed at valve seat middle part horizontal hole, and become the upper and lower two sections Cross section Design of bearing hydraulic coupling pressure of valve seat the top area greater than the bottom area, when hydraulic coupling Pi=P1 in the pipeline greater than zero the time, valve seat integral body also will be subjected to a hydraulic pressure component Δ F upwards except being subjected to cylinder action power, spring force, surface friction drag, this power increases with hydraulic coupling P1, and direction is but opposite with cylinder action power.Therefore can strengthen the power that is adjacent to of valve seat and seal spool valve face during this valve work automatically, make spool valve base sealing performance with hydraulic coupling constantly increase strengthen.
Take all factors into consideration, the valve seat upper design is become Φ D, the bottom is designed to Φ d (Φ D＞Φ d).According to the action principle of power, when there is action of hydraulic force at liquid entering hole place, valve seat middle part,, will produce an active force Δ F=Δ S*P1 who makes progress to valve seat because there is cross section product moment Δ S in last lower section.Therefore it is big more to work as liquid entering hole pressure, and the active force Δ F that valve seat is made progress also can be big more.Thus, be subjected to hydraulic coupling after, valve seat just has a movement tendency that makes progress, the sealing that has increased sealing surface is adjacent to power.As long as external force that cylinder is given is suitable, the valve seat spool just can be suspended in the valve body freely.
Claims (3)
1. the pneumoelectric control is by unloading valve, it is characterized in that coaxial force rod (1) is arranged on the valve body (4), spool (3), valve seat (5), valve seat (5) upper end is connected with spool (3) upper flanges by little spring (2), valve seat (5) lower end is connected with off-load joint (8) or valve body by big spring (7), valve seat (5) have communicate on, following vertical axis hole and horizontal hole, last vertical axis bore dia is greater than following vertical axis bore dia, spool (3) upper end is connected with force rod, vertical axis hole is passed in the lower end, the lower end conical surface is sealed and matched with the conical surface of following vertical axis hole, down vertical axis hole upper end links to each other with inlet union (6) by horizontal hole, and following vertical axis hole lower end links to each other with off-load joint (8).
2. pneumoelectric control according to claim 1 is by unloading valve, it is characterized in that the diameter of phi d of the diameter of phi D of the last vertical axis hole place of valve seat (5) section greater than following vertical axis hole place section, horizontal hole is positioned at two sections intersection and runs through valve seat and is communicated with the cavity around valve seat of valve body (4).
3. pneumoelectric control according to claim 1 is characterized in that when imported hydraulic power Pi=0 by unloading valve, and spool (3) has distance with the final position that relative valve body after valve seat (5) is subjected to external force moves downward apart from off-load joint (8) upper-end surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201827377U CN201739535U (en) | 2010-05-07 | 2010-05-07 | Pneumatic electric stop unloading valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201827377U CN201739535U (en) | 2010-05-07 | 2010-05-07 | Pneumatic electric stop unloading valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201739535U true CN201739535U (en) | 2011-02-09 |
Family
ID=43554810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201827377U Expired - Fee Related CN201739535U (en) | 2010-05-07 | 2010-05-07 | Pneumatic electric stop unloading valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201739535U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952920A (en) * | 2016-07-06 | 2016-09-21 | 深圳市淏森科技有限公司 | Fluid control temperature balance valve |
| CN106444880A (en) * | 2014-12-10 | 2017-02-22 | 四川杰特机器有限公司 | Pressure control method for pressure test medium capable of bilateral flow |
-
2010
- 2010-05-07 CN CN2010201827377U patent/CN201739535U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106444880A (en) * | 2014-12-10 | 2017-02-22 | 四川杰特机器有限公司 | Pressure control method for pressure test medium capable of bilateral flow |
| CN106444880B (en) * | 2014-12-10 | 2019-03-22 | 四川杰特机器有限公司 | A kind of pair of test medium can two-way flow compress control method |
| CN105952920A (en) * | 2016-07-06 | 2016-09-21 | 深圳市淏森科技有限公司 | Fluid control temperature balance valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20170507 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |