CN2379671Y - Balanced type direct load safety valve - Google Patents
Balanced type direct load safety valve Download PDFInfo
- Publication number
- CN2379671Y CN2379671Y CN 99231771 CN99231771U CN2379671Y CN 2379671 Y CN2379671 Y CN 2379671Y CN 99231771 CN99231771 CN 99231771 CN 99231771 U CN99231771 U CN 99231771U CN 2379671 Y CN2379671 Y CN 2379671Y
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- China
- Prior art keywords
- valve
- spool
- valve pocket
- inner chamber
- opening
- 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.)
- Expired - Fee Related
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- 238000007789 sealing Methods 0.000 claims description 37
- 240000002853 Nelumbo nucifera Species 0.000 claims description 8
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 8
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 8
- 230000009021 linear effect Effects 0.000 claims description 8
- 210000003746 feather Anatomy 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009194 climbing Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model relates to a balanced type direct load relief valve, mainly by the valve body, the valve barrel, a valve core, the valve gap, the disk seat, adjusting screw constitutes such as, the characteristic is that the case is cylindric stopper shape step case, match with the valve barrel that has the step hole and merge to correspond and form sealed ring room, it is provided with balance hole and opening hole to correspond more than at least one sealed ring room on case and the valve barrel, the inner chamber of case bottom has inlayed rubber packing pad and cover pad, constitute hard soft dual-seal pair with the boss conical surface above the disk seat, this kind of relief valve has utilized multistage balanced principle, it is high to make it have the regulation precision, it is little to open and close the pressure differential scope, it is accurate to reset, characteristics such as the.
Description
The utility model belongs to valve, and particularly a kind of balanced linear of equipment such as oil-gas gathering and transferring pipeline device, boiler, container that is applicable to is carried the lotus safety valve.
At present, at oil, chemical pipeline device, in the device systems such as boiler, container, usually adopt traditional spring Direct loaded safety valve to make safety protection equipment, because there are defectives such as degree of regulation is low, action is difficult for resetting, leak easily, amount of maintenance is big in this safety valve, can not satisfy industrial needs.
The purpose of this utility model is for overcoming the deficiency of the said goods design, improve the degree of regulation of safety valve, and reach reset accurately, requirements such as sealing is reliable, long service life, and design a kind of novel safety valve.
The purpose of this utility model is achieved through the following technical solutions:
Balanced linear is carried the lotus safety valve, is made up of valve body, valve pocket, spool, valve gap, valve seat, adjusting screw rod, spring, it is characterized in that:
A. spool is a cylinder stopper step type spool, matches with the valve pocket with step type endoporus, is embedded with rubber seal on the sealing surface of spool step, corresponding composition sealing ring casing with valve pocket inner chamber step;
B. have equalizing orifice on the spool, have opening on the valve pocket;
C. spool bottom inner chamber is embedded with rubber gasket and sleeve gasket, forms hard soft pair of matter sealing pair with the boss conical surface above the valve seat;
D. the spool feather edge is provided with corresponding to the lower end of valve pocket opening and presses stroke together.
The utility model also has following technical characteristics:
According to the size of pressure medium, can on spool and valve pocket, equalizing orifice and opening be set the more than one at least sealing ring casing of correspondence.
The spool bottom inner chamber and the valve seat boss conical surface adopt hard alloy overlay welding to form.
The utility model compared with prior art has the following advantages:
1. it is supporting that spool, valve pocket adopt cylinder stopper step, form the sealing ring casing by " O " shape rubber seal, corresponding to the closing of safety valve, discharge, return a seat working procedure, under less spring force effect, utilize multistage equilibrium principle, can satisfy the balanced linear of different inside nominal diameters, different nominal pressures and carry the lotus safety valve.
2. adopt hard soft pair of matter sealing pair, guarantee that sealing is reliable, work the setting of pressing stroke and make this valve have the prominent effect of opening, thereby realize that degree of regulation height, Blowdown of a safety valve scope are little, reset accurately, return a seat good airproof performance, long service life, characteristics such as simple in structure, easy to maintenance.
Fig. 1 is one of the utility model embodiment's a structural representation;
Fig. 2 closes, discharges, returns the schematic representation of three kinds of states of seat for the utility model;
Fig. 3 presses stroke partial view partly.
The utility model will be further described according to accompanying drawing embodiment below:
As Fig. 1, shown in Figure 2, balanced linear is carried the lotus safety valve mainly by valve body 7, valve pocket 9, spool 12, valve gap 17, valve seat 2, adjusting screw rod 21, spring 14 grades are partly formed, wherein spool 12 adopts three grades of step spools of cylinder stopper, matching with the valve pocket 9 with three grades of inner bore of step (also can be secondary, multistage step combination such as level Four), on the sealing surface of three grades of steps of spool, be embedded with " O " shape rubber seal 5 respectively, with three sealings of the corresponding composition of valve pocket inner chamber step ring casing 23,24,25, have equalizing orifice 6 on the spool 12, have opening 8 on the valve pocket 9, according to the size of pressure medium, can be on spool 12 and valve pocket 9 the more than one at least sealing ring casing of correspondence equalizing orifice and opening are set (present embodiment illustrate spool, corresponding three the sealing ring casings of valve pocket are provided with the situation of equalizing orifice and opening).Spool 12 bottom inner chambers are embedded with rubber gasket 3 and sleeve gasket 4, form hard soft pair of matter sealing pair with the boss conical surface above the valve seat 2, the spool bottom inner chamber and the valve seat boss conical surface adopt hard alloy overlay welding to form, and are provided with " O " rubber seal 1 between valve seat 2 and the valve body 7.
The spool upper end is connected with spring seat 11, nut 13, and spring 14 is housed on the spring seat, and the spring upper end is pressed into upper spring seat 15, is connected Regulation spring pressure with adjusting screw rod 21.Adjusting screw rod 21, stuffing box packing 16, gland nut 18 and valve gap 17, support 19, locking nut 20 assemblings are installed guard shield 22 on the support 19, be provided with rubber seal 10 between valve pocket 9 and the valve gap 17.When pressure medium surpassed rated working pressure, the seal ring constant pressure difference balance that spool 12, valve pocket 9, " O " shape rubber seal 5 are formed was broken, and moved on the spool and realized the superpressure discharging.
Below in conjunction with Fig. 2, Fig. 3 working state of the present utility model is described:
One. closed condition.Spool 12 is in the C position, inner chamber cylndrical surface, spool bottom and be embedded in rubber gasket 3 end faces of valve core cavity and the valve seat 2 boss conical surfaces and raised head face are formed hard soft pair of matter sealing pair, under the 23 area pressure balance power effects of sealing ring casing, adjust adjusting screw rod 21 and give spring 14 setting spring power, because sealing ring casing 23 forms the area pressure balance with the valve seat medium channel, less spring force can realize that hard soft pair of matter sealing pair seals reliably.
Two. emissions status.This moment, spool 12 was in the B position, rising along with pressure medium, the seal pressure equilibrium of forces state that reaches with joint efforts of equilibrant that sealing ring casing 23 produces and spring force is broken, spool 12 moves in valve pocket 9, the spool sealing surface of lifting off a seat is provided with to opening that valve pocket is opened 8 places and presses stroke 26 (see figure 3)s together, valve core cavity sealing surface 2 sealing surfaces of lifting off a seat, spool is subjected to the area of pressure medium to increase to the inner chamber area by former inner chamber area to add the exocoel area, make increased by the pressure medium area, the climbing power of spool in valve pocket increases.When the valve pressure medium surpasses Set pressure, remove on spool is quick and open, realized prominent open function and superpressure discharging.In the discharge process, when moving on on the spool, sealing ring casing 24 communicates with the discharge medium passage, by the area pressure reduction of sealing ring casing 24 and the area pressure reduction of sealing ring casing 23, common balance valve core 12 moves the compression area equilibrium of forces pressure reduction that discharging increases in valve pocket 9, guarantees the normal discharging of superpressure medium.
Three. return the seat state.This moment, spool was in the A position, discharging along with pressure medium, the spool compression area has reached new balance at the valve pocket inner chamber when area pressure reduction that sealing ring casing 23,24 is formed and discharging, under the spring pressure effect, spool begins to move down, when spool is displaced downwardly to the root edge of valve pocket opening 8, sealing ring casing 25 communicates with valve pocket opening 8, it is poor that the area pressure reduction acting in conjunction of sealing ring casing 23,24,25 is overstock in the spool bottom end, at this moment, the top and bottom compression area of spool in valve pocket is equal fully, is subjected to pressure medium to reach balance.Under the spring pressure effect, spool quickens to move down, and when pressing close to the sealing surface of valve seat 2, utilizes spool speed, and stroke distances is pressed in rising that tripping sealing surface of seat to valve pocket opening place offers, and guarantees to reach when spool is got back to sealing surface of seat the reliable sealing effect.When valve was in closed condition, the chamber pressure of sealing ring casing 23,24 was drained by the valve pocket opening thereupon.
Claims (3)
1. a balanced linear is carried the lotus safety valve, is made up of valve body, valve pocket, spool, valve gap, valve seat, adjusting screw rod, spring, it is characterized in that:
A. spool (12) is a cylinder stopper step type spool, matches with the valve pocket with step type endoporus (9), is embedded with rubber seal (5) on the sealing surface of spool step, corresponding composition sealing ring casing with valve pocket inner chamber step;
B. have equalizing orifice (6) on the spool (12), have opening (8) on the valve pocket (9);
C. spool (12) bottom inner chamber is embedded with rubber gasket (3) and sleeve gasket (4), forms hard soft pair of matter sealing pair with the boss conical surface above the valve seat (2);
D. spool (12) feather edge is provided with corresponding to the lower end of valve pocket (9) opening (8) and presses stroke (26) together.
2. balanced linear as claimed in claim 1 is carried the lotus safety valve, it is characterized in that equalizing orifice and opening being set at spool (12) and the last more than one at least sealing ring casing of correspondence of valve pocket (9).
3. carry the lotus safety valve as claim 1,2 described balanced linears, it is characterized in that spool (12) the bottom inner chamber and valve seat (2) the boss conical surface adopt hard alloy overlay welding to form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99231771 CN2379671Y (en) | 1999-06-01 | 1999-06-01 | Balanced type direct load safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99231771 CN2379671Y (en) | 1999-06-01 | 1999-06-01 | Balanced type direct load safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2379671Y true CN2379671Y (en) | 2000-05-24 |
Family
ID=34020564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99231771 Expired - Fee Related CN2379671Y (en) | 1999-06-01 | 1999-06-01 | Balanced type direct load safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2379671Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829223A (en) * | 2012-09-08 | 2012-12-19 | 环球阀门集团有限公司 | Multistage adjusting constant flow valve |
| CN104180033A (en) * | 2014-08-01 | 2014-12-03 | 浙江恒华阀门有限公司 | Piston balanced type pressure releasing valve |
-
1999
- 1999-06-01 CN CN 99231771 patent/CN2379671Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829223A (en) * | 2012-09-08 | 2012-12-19 | 环球阀门集团有限公司 | Multistage adjusting constant flow valve |
| CN104180033A (en) * | 2014-08-01 | 2014-12-03 | 浙江恒华阀门有限公司 | Piston balanced type pressure releasing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |