CN204061924U - Internal bypass balanced type break valve - Google Patents
Internal bypass balanced type break valve Download PDFInfo
- Publication number
- CN204061924U CN204061924U CN201420517321.4U CN201420517321U CN204061924U CN 204061924 U CN204061924 U CN 204061924U CN 201420517321 U CN201420517321 U CN 201420517321U CN 204061924 U CN204061924 U CN 204061924U
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- China
- Prior art keywords
- flap
- linkage section
- valve
- positive stop
- valve rod
- 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 - Lifetime
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- 238000007789 sealing Methods 0.000 claims abstract description 10
- 230000007704 transition Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- Safety Valves (AREA)
Abstract
The utility model discloses a kind of internal bypass balanced type break valve, comprise valve body, valve gap, valve rod, flap, described valve rod passes valve gap through seal section, valve rod is also spun by thread section and valve gap, described flap is disc, flap center has through hole, described valve rod lower end is provided with linkage section, this linkage section is slidably connected with the through hole on flap, circumferentially guide's gas pressure relief slot is had vertically at linkage section, the step surface of linkage section upper end is and sealing surface between flap upper-end surface, positive stop is fixed with in the lower end of linkage section, slidably be connected between flap on linkage section and positive stop and be provided with axial clearance.It is little that the internal bypass balanced type break valve of this model utility not only opens moment, and structure is simple, is convenient to making and installation.
Description
Technical field
The utility model relates to a kind of stop valve, particularly relates to a kind of stop valve with internal bypass structure.
Background technique
The use of stop valve is very general, but it is larger owing to opening and closing moment, its inside nominal diameter is all limited in less than 250, and the stop valve flowing medium of inside nominal diameter more than 200 mostly flows into from the top of flap, this be consider valve closedown moment caused by, in order to reduce to open or close moment, the stop valve of general inside nominal diameter more than 200 is all provided with internal bypass or outer by-pass structure.
Usually stop valve internal bypass structure used is for have main relief hole in main valve clack central lower, top has secondary flap attachment hole and valve clack cover connecting thread hole, the sidewall of main valve clack has some secondary relief holes, secondary flap is arranged at valve rod bottom, valve clack cover is rotatably connected on main valve clack, and valve clack cover lower end surface and secondary flap keep certain axial distance.When needs Open valve, valve rod first drives secondary flap to move up, now secondary flap is not by the effect of fluid medium pressure, after the main relief hole depressurization of secondary flap and main valve clack, flowing medium flows through main relief hole from secondary relief hole and flows out, alleviate pressure medium, when after secondary valve flap contacts to valve clack cover, the valve rod that continuation is carried is by secondary flap, valve clack cover drives main valve clack to move upward, because fluid medium pressure is by secondary relief hole, main relief hole excretion alleviates, thus the fluid medium pressure suffered by main valve clack is greatly reduced, valve is easily opened.The problem that when although above-mentioned prior art solves valve opening, pressure is excessive, its structure is comparatively complicated, and number of spare parts is many, manufacturing and install all inconvenient.
Model utility content
For the above-mentioned deficiency existing for prior art, technical problem to be solved in the utility model is to provide a kind of internal bypass balanced type break valve, and it is little that it not only opens moment, and structure is simple, is convenient to making and installation.
In order to solve the problems of the technologies described above, a kind of internal bypass balanced type break valve of the present utility model, comprise valve body, valve gap, valve rod, flap, described valve rod passes valve gap through seal section, valve rod is also spun by thread section and valve gap, described flap is disc, flap center has through hole, described valve rod lower end is provided with linkage section, this linkage section is slidably connected with the through hole on flap, circumferentially guide's gas pressure relief slot is had vertically at linkage section, the step surface of linkage section upper end is and sealing surface between flap upper-end surface, positive stop is fixed with in the lower end of linkage section, slidably be connected between flap on linkage section and positive stop and be provided with axial clearance.
In said structure, because described flap is disc, flap center has through hole, then this valve flap structure is very simply easily manufactured, again because described valve rod lower end is provided with linkage section, this linkage section is slidably connected with the through hole on flap, circumferentially guide's gas pressure relief slot is had vertically at linkage section, the step surface of linkage section upper end is and sealing surface between flap upper-end surface, then described guide's gas pressure relief slot is arranged on the linkage section of valve rod, the step surface of linkage section upper end is and sealing surface between flap upper-end surface, when valve rod comes downwards to extreme lower position, fit in sealing face and flap upper-end surface, guide's gas pressure relief slot is closed, now flap is also in closed condition, when valve rod is carried, valve rod linkage section upper end step face and flap upper-end surface depressurization, on flap, the valve pocket of below is communicated with by the guide's gas pressure relief slot on valve rod linkage section, flowing medium above flap flow into below flap from guide's gas pressure relief slot, fluid medium pressure above flap is alleviated, unlatching for flap provides conveniently, again because the lower end at linkage section is fixed with positive stop, slidably be connected between flap on linkage section and positive stop and be provided with axial clearance, like this, when journey that valve rod is begun a new line is greater than the axial clearance be slidably connected between flap on linkage section and positive stop, positive stop can drive flap move upward and open valve, due to flap move upward before flowing medium obtain pressure release, therefore flap can be opened more easily, thus achieves the little requirement of valve opening moment, compared with internal bypass structure usually used, this structure eliminates secondary flap, valve clack cover, and the structure of flap also greatly simplifies, thus makes overall structure simple, is convenient to making and installation.
A kind of preferred implementation of the present utility model, described guide's gas pressure relief slot has four, and four guide's gas pressure relief slots are circumferentially uniform, and the both sides angle of guide's gas pressure relief slot is 90 degree, and between both sides, arc transition connects.Adopt this mode of execution, guide's gas pressure relief slot quantity is many, and actual circulation area is large, and pressure release effect is better.
Another kind of preferred implementation of the present utility model, is provided with seal ring between the step surface of described linkage section upper end and flap upper-end surface.Adopt this mode of execution, more reliable to the sealing effect of guide's gas pressure relief slot between valve rod and flap.
Another preferred implementation of the present utility model, described positive stop is rectangular bulk, and the central position of rectangular block positive stop has link bolt hole.Adopt this mode of execution, the positive stop structure of rectangular bulk is simple, and less to blocking of guide's gas pressure relief slot, and pressure-relief flow guide is effective.
The further preferred implementation of the utility model, described positive stop is in band disc shaped jaggy, and the shape of breach is corresponding with linkage section guide gas pressure relief slot shape and quantity with quantity, has link bolt hole in the central position of the positive stop of disc shaped.Adopt this mode of execution, be with disc shaped positive stop jaggy can have no to block to guide's gas pressure relief slot, pressure-relief flow guide better effects if.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model internal bypass balanced type break valve is described in further detail.
Fig. 1 is the structural representation of a kind of embodiment of the utility model internal bypass balanced type break valve;
Fig. 2 is the worm's eye view of valve rod linkage section in structure shown in Fig. 1;
Fig. 3 is the structural representation of positive stop in structure shown in Fig. 1.
In figure: 1-valve body, 2-positive stop, 3-linkage section, 4-flap, 5-seal ring, 6-valve rod, 7-valve gap, 8-seal section, 9-thread section, 10-handwheel, 11-guide's gas pressure relief slot.
Embodiment
In internal bypass balanced type break valve shown in Fig. 1 to Fig. 3, valve gap 7 is sealedly and fixedly connected on valve body 1, valve rod 6 passes valve gap 7 through seal section 8, valve rod 6 is also spun by thread section 9 and valve gap 7, valve rod 6 outboard end and handwheel 10 are connected, when rotating handwheel 10, valve rod 6 produces and moves up and down, valve rod 6 medial extremity is provided with linkage section 3, circumferentially guide's gas pressure relief slot 11 is had vertically at linkage section 3, described guide's gas pressure relief slot 11 has four, four guide's gas pressure relief slots 11 are circumferentially uniform, the both sides angle of guide's gas pressure relief slot 11 is 90 degree, between both sides, arc transition connects, flap 4 is in simple disc-shape, and its lower end surface is working seal face and corresponding with the sealing surface of valve body 1, and have through hole at flap 4 center, the linkage section 3 of valve rod 6 lower end is slidably connected with the through hole on flap 4, the step surface of linkage section 3 upper end is and sealing surface between flap 4 upper-end surface, seal ring 5 is provided with between the step surface of linkage section 3 upper end and flap 4 upper-end surface, positive stop 2 is fixed with in the lower end of linkage section 3, positive stop 2 is in band disc shaped jaggy, the shape of breach is corresponding with linkage section 3 guide gas pressure relief slot 11 shape and quantity with quantity, link bolt hole is had in the central position of the positive stop 2 of disc shaped, positive stop 2 and valve rod 6 lower end linkage section 3 are connected by this bolt hole by connecting bolt, slidably be connected between flap 4 on linkage section 3 and positive stop 2 and be provided with axial clearance.
In working procedure, rotating handwheel 10 makes valve rod 6 descending, the step surface of linkage section 3 upper end on valve rod 6 presses to flap 4 through seal ring 5, sealing surface in flap 4 lower end surface and valve body 1 is fitted, valve is closed, when valve opened by needs, rotate backward handwheel 10, valve rod 6 is up, linkage section 3 upper end step face on valve rod 6 and flap 4 upper-end surface depressurization, on flap 4, the valve pocket of below is communicated with by the guide's gas pressure relief slot 11 on valve rod 6 linkage section 3, flowing medium above flap 4 flow into below flap 4 from guide's gas pressure relief slot 11, fluid medium pressure above flap 4 is alleviated, unlatching for flap 4 provides conveniently, when the up stroke of valve rod 6 is greater than the axial clearance be slidably connected between flap 4 on linkage section 3 and positive stop 2, positive stop 2 can drive flap 4 move upward and open valve, due to flap 4 move upward before flowing medium obtain pressure release, therefore flap 4 can be opened more easily, thus achieve the little requirement of valve opening moment.
Above-mentionedly only list embodiments more of the present utility model, but the utility model is not limited in this, more improvement and conversion can also be made, as as described in positive stop 2 also can be long strip block shape, positive stop 2 width of rectangular bulk is less, less to blocking of guide's gas pressure relief slot 11, the central position of rectangular block positive stop 2 has link bolt hole, in order to be fixedly connected with valve rod 6 lower end; The quantity of described guide's gas pressure relief slot 11 may not be four, but one, two, three or more.Therefore, as long as improvement done on the utility model basic principle basis and conversion, all should be considered as falling in protection domain of the present utility model.
Claims (5)
1. an internal bypass balanced type break valve, comprise valve body (1), valve gap (7), valve rod (6), flap (4), described valve rod (6) through seal section (8) through valve gap (7), valve rod (6) is also spun by thread section (9) and valve gap (7), it is characterized in that: described flap (4) is in disc, flap (4) center has through hole, described valve rod (6) lower end is provided with linkage section (3), this linkage section (3) is slidably connected with the through hole on flap (4), guide's gas pressure relief slot (11) is circumferentially had vertically at linkage section (3), the step surface of linkage section (3) upper end is and sealing surface between flap (4) upper-end surface, positive stop (2) is fixed with in the lower end of linkage section (3), slidably be connected between flap (4) on linkage section (3) and positive stop (2) and be provided with axial clearance.
2. internal bypass balanced type break valve according to claim 1, it is characterized in that: described guide's gas pressure relief slot (11) has four, four guide's gas pressure relief slots (11) are circumferentially uniform, and the both sides angle of guide's gas pressure relief slot (11) is 90 degree, and between both sides, arc transition connects.
3. internal bypass balanced type break valve according to claim 1, is characterized in that: be provided with seal ring (5) between the step surface of described linkage section (3) upper end and flap (4) upper-end surface.
4. internal bypass balanced type break valve according to claim 1, is characterized in that: described positive stop (2) is rectangular bulk, and the central position of rectangular block positive stop (2) has link bolt hole.
5. internal bypass balanced type break valve according to claim 1, it is characterized in that: described positive stop (2) is in band disc shaped jaggy, the shape of breach is corresponding with linkage section (3) guide's gas pressure relief slot (11) shape and quantity with quantity, has link bolt hole in the central position of the positive stop (2) of disc shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420517321.4U CN204061924U (en) | 2014-09-10 | 2014-09-10 | Internal bypass balanced type break valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420517321.4U CN204061924U (en) | 2014-09-10 | 2014-09-10 | Internal bypass balanced type break valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204061924U true CN204061924U (en) | 2014-12-31 |
Family
ID=52203443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420517321.4U Expired - Lifetime CN204061924U (en) | 2014-09-10 | 2014-09-10 | Internal bypass balanced type break valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204061924U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202175A (en) * | 2017-07-28 | 2017-09-26 | 泉州市沪航阀门制造有限公司 | Horizontal large-diameter semi-ball valve |
-
2014
- 2014-09-10 CN CN201420517321.4U patent/CN204061924U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202175A (en) * | 2017-07-28 | 2017-09-26 | 泉州市沪航阀门制造有限公司 | Horizontal large-diameter semi-ball valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141231 |