CN207393983U - A kind of high pressure self-tightening type shut-off valve for reverse direction flow medium - Google Patents
A kind of high pressure self-tightening type shut-off valve for reverse direction flow medium Download PDFInfo
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- CN207393983U CN207393983U CN201721149630.0U CN201721149630U CN207393983U CN 207393983 U CN207393983 U CN 207393983U CN 201721149630 U CN201721149630 U CN 201721149630U CN 207393983 U CN207393983 U CN 207393983U
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- valve
- flap
- high pressure
- reverse direction
- sealing
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Abstract
The utility model discloses a kind of high pressure self-tightening type shut-off valves for reverse direction flow medium, welded type valve seat is equipped in valve body, valve seat, which is contacted and cooperated with the sealing surface of flap, forms the first sealing pair, the vertical direction of flap is provided with vertical through hole, the horizontal direction of flap is both provided with horizontal through hole, vertical through hole is directly connected with horizontal through hole with runner, it is the recessed portion of flap at connection, stem bottom is arranged in recessed portion, inside flap the second sealing pair is combined into the matching of the sealing surface of stem bottom, sealing between valve rod and flap is completed by the up and down motion of valve rod, the effect of the utility model sealing is good, medium is not easy to reveal, be conducive to the balance of pressure medium, greatly reduce the opening and closing operating force of valve.
Description
Technical field
The utility model is related to valve fields, and in particular to a kind of high pressure self-tightening type for reverse direction flow medium ends
Valve.
Background technology
Shut-off valve is mounted on pipeline to block the usual means of medium, existing shut-off valve generally include valve body,
Flap, valve seat, valve rod, valve deck, handwheel, the flap of existing shut-off valve is mostly the single valve valve structure of integral type, is opened every time in valve rod
It closes in lifting process, can all generate certain axial impact force, preferable leakproofness is cannot keep between valve rod and valve deck.
The content of the invention
To solve the above-mentioned problems, the utility model provides a kind of high pressure self-tightening type for reverse direction flow medium and ends
Valve.
The technical solution of the utility model is：A kind of high pressure self-tightening type shut-off valve for reverse direction flow medium, in valve body
Equipped with welded type valve seat, valve seat, which is contacted and cooperated with the sealing surface of flap, forms the first sealing pair, the vertical direction of flap
Vertical through hole is provided with, the horizontal direction of flap is both provided with horizontal through hole, and vertical through hole directly connects with horizontal through hole with runner
It is logical, it is the recessed portion of flap at connection, stem bottom is arranged in recessed portion, is matched inside flap with the sealing surface of stem bottom
The second sealing pair is combined into, the sealing between valve rod and flap is completed by the up and down motion of valve rod.
Further, it is less than the sealing surface of valve seat and flap inside the flap with the size of the sealing surface of stem bottom.
Further, the outer cover of the valve rod is equipped with valve clack cover, and valve clack cover is fixed on flap, is set above valve clack cover
Valve deck is equipped with, valve deck is set on valve rod, and the outside of valve deck is arranged with self-tightening seal ring, grading ring, four opens successively from bottom to up
Ring is arranged with clamp nut in the outer wall of valve deck.
Further, airtight and watertight padding is provided in the valve deck, airtight and watertight padding is compressed by sealed pressing sleeve, and sealed pressing sleeve is by filling out
Expect that pressing plate compresses.
Further, the hold-down grid is connected with restraining disk by stud and nut, is restrained disk fixation and is set in
The outer wall of valve deck.
Further, it is provided with disc spring between the nut and hold-down grid
The beneficial effects of the utility model are：For the utility model tool there are two sealing pair, the second sealing pair is only used for medium
In the case of for reverse direction flow, such is designed with the opening and closing operating force for beneficial to balanced pressure medium, greatly reducing valve.
Description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the structure diagram of the utility model.
Fig. 2 is the enlarged drawing at flap position.
Fig. 3 is the structure diagram of valve rod upper end.
Specific embodiment
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings, the present embodiment is not formed to this
The limitation of utility model.
A kind of high pressure self-tightening type shut-off valve for reverse direction flow medium, including valve body 1, valve seat 2, flap 3, recessed portion 4,
Valve rod 5, valve clack cover 6, valve deck 7, self-tightening seal ring 8, grading ring 9, pendant collet 10, clamp nut 11, airtight and watertight padding 12, filler pressure
It covers 13 compressions, hold-down grid 14, restrain disk 15, disc spring 16, valve stem nut 17, gear-box 18, handwheel 19.
As shown in Figure 1, 2, it is equipped with welded type valve seat 2 in valve body 1, valve seat 2 contacts and mutual with the sealing surface 303 of flap 3
Cooperation forms the first sealing pair, and valve seat 2 and the sealing of flap 3 are completed by the pressure of medium.
The vertical direction of flap 3 is provided with vertical through hole 301, and the horizontal direction of flap 3 is both provided with horizontal through hole 302,
Vertical through hole 301 is directly connected with horizontal through hole 302 with runner.It is the recessed portion 4 of flap 3 at connection, 5 bottom of valve rod is arranged on
In recessed portion 4.
3 inside of flap and the matching of sealing surface 501 of 5 bottom of valve rod are combined into the second sealing pair, between valve rod 5 and flap 3
Sealing completed by the closing of valve rod 5.Since 3 inside of flap and the size of the sealing surface 501 of 5 bottom of valve rod are far smaller than valve
The sealing surface 303 of seat 2 and flap 3, therefore effectively reduce the operating force of valve rod 5 and the diameter of valve rod 5.
The outer cover of valve rod 5 is equipped with valve clack cover 6, and valve clack cover 6 is fixed on flap 3, for constraining valve rod 5 in flap 3
The stroke in portion.
The top of valve clack cover 6 is provided with valve deck 7, and valve deck 7 is set on valve rod 5, and the outside of valve deck 7 covers successively from bottom to up
Equipped with self-tightening seal ring 8, grading ring 9, pendant collet 10, clamp nut 11 is arranged in the outer wall of valve deck 7, clamp nut 11 is set
In the top of pendant collet, self-tightening seal ring 8, grading ring 9, pendant collet 10 is made to be pressed on valve deck 7.
Airtight and watertight padding 12 is provided between valve deck 7 and valve rod 5, airtight and watertight padding 12 is compressed by filler pressing sleeve 13, filler pressure
Set 13 is compressed by hold-down grid 14, and hold-down grid 14 is with fixing the containing disk 15 for the outer wall for being set in valve deck 7 by stud and spiral shell
Mother's connection, is provided with disc spring 16, can make to be formed more between hold-down grid 14 and airtight and watertight padding 12 between nut and hold-down grid 14
Good pressing force.
As shown in figure 3, the upper end of valve rod 5 is through valve stem nut 17 and is threadedly coupled with valve stem nut 17, valve stem nut 17
It is connected with gear-box 18, gear-box 18 is connected with handwheel 19, and wherein the gear in gear-box 18 is bevel gear.
Operation principle is：During valve opening, the second sealing pair is first opened, the vertically and horizontally side that subsequent medium passes through flap
It is flowed through to through hole, pressure difference reduces, and the first sealing pair just easily opens very much.Second sealing pair is only used for the feelings that medium is reverse direction flow
Under condition, such is designed with beneficial to balanced pressure medium.
The above descriptions are merely preferred embodiments of the present invention, is not used in limitation the utility model, this field skill
Art personnel can make the utility model various modifications or equivalent substitution in the essence and protection domain of the utility model,
This modification or equivalent substitution also should be regarded as in the protection domain of technical solutions of the utility model.
Claims (6)
1. a kind of high pressure self-tightening type shut-off valve for reverse direction flow medium, it is characterised in that：Welded type valve seat is equipped in valve body,
Valve seat, which is contacted and cooperated with the sealing surface of flap, forms the first sealing pair, and the vertical direction of flap is provided with vertical through hole,
The horizontal direction of flap is both provided with horizontal through hole, and vertical through hole is directly connected with horizontal through hole with runner, is flap at connection
Recessed portion, stem bottom is arranged in recessed portion, and the second sealing is combined into the matching of the sealing surface of stem bottom inside flap
Pair, the sealing between valve rod and flap are completed by the up and down motion of valve rod.
2. a kind of high pressure self-tightening type shut-off valve for reverse direction flow medium according to claim 1, it is characterised in that：Institute
State the sealing surface for being less than valve seat and flap inside flap with the size of the sealing surface of stem bottom.
3. a kind of high pressure self-tightening type shut-off valve for reverse direction flow medium according to claim 2, it is characterised in that：Institute
The outer cover for stating valve rod is equipped with valve clack cover, and valve clack cover is fixed on flap, valve deck is provided with above valve clack cover, valve deck is set in
On valve rod, the outside of valve deck is arranged with self-tightening seal ring, grading ring, pendant collet successively from bottom to up, is arranged in the outer wall of valve deck
There is clamp nut.
4. a kind of high pressure self-tightening type shut-off valve for reverse direction flow medium according to claim 3, it is characterised in that：Institute
It states and airtight and watertight padding is provided in valve deck, airtight and watertight padding is compressed by sealed pressing sleeve, and sealed pressing sleeve is compressed by hold-down grid.
5. a kind of high pressure self-tightening type shut-off valve for reverse direction flow medium according to claim 4, it is characterised in that：Institute
It states hold-down grid and is connected with restraining disk by stud and nut, restrain the outer wall that disk fixation is set in valve deck.
6. a kind of high pressure self-tightening type shut-off valve for reverse direction flow medium according to claim 5, it is characterised in that：Institute
It states and disc spring is provided between nut and hold-down grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721149630.0U CN207393983U (en) | 2017-09-08 | 2017-09-08 | A kind of high pressure self-tightening type shut-off valve for reverse direction flow medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721149630.0U CN207393983U (en) | 2017-09-08 | 2017-09-08 | A kind of high pressure self-tightening type shut-off valve for reverse direction flow medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207393983U true CN207393983U (en) | 2018-05-22 |
Family
ID=62415842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721149630.0U Active CN207393983U (en) | 2017-09-08 | 2017-09-08 | A kind of high pressure self-tightening type shut-off valve for reverse direction flow medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207393983U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112797169A (en) * | 2021-01-25 | 2021-05-14 | 沪航科技集团有限公司 | Back-flushing type stop valve |
-
2017
- 2017-09-08 CN CN201721149630.0U patent/CN207393983U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112797169A (en) * | 2021-01-25 | 2021-05-14 | 沪航科技集团有限公司 | Back-flushing type stop valve |
| CN112797169B (en) * | 2021-01-25 | 2022-08-16 | 沪航科技集团有限公司 | Back flush type stop valve |
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