CN204061925U - Internal bypass rapid starting and stopping check valve - Google Patents
Internal bypass rapid starting and stopping check valve Download PDFInfo
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- CN204061925U CN204061925U CN201420517335.6U CN201420517335U CN204061925U CN 204061925 U CN204061925 U CN 204061925U CN 201420517335 U CN201420517335 U CN 201420517335U CN 204061925 U CN204061925 U CN 204061925U
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- flap
- valve
- secondary flap
- relief hole
- valve rod
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Abstract
The utility model discloses a kind of internal bypass rapid starting and stopping check 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 valve rod is spun by lower thread section and secondary flap, the lower end sealing surface of secondary flap is relative with the main relief hole sealing surface on flap, and secondary flap is arranged in flap hole movably, is provided with secondary flap circumference limit stoper between secondary flap and flap; Described flap sidewall has guide's relief hole, and flap upper end is provided with valve clack cover, and valve clack cover endoporus is less than secondary flap cylindrical, is provided with axial clearance between valve clack cover and secondary flap, is provided with flap circumference limit stoper in valve body.Adopt this internal bypass rapid starting and stopping check valve can not only realize the switching controlling functions of fluid medium, and it is little to open and close moment, open and close rapidly, actuation time is short.
Description
Technical field
The utility model relates to a kind of valve, particularly relates to a kind of stop valve.
Background technique
Conventional stop valve is because fluid medium pressure is to the effect of flap, open moment larger, opening process is generally undertaken by rotating handwheel, perdurabgility is longer, in order to reduce to open moment, general bigbore stop valve is all provided with internal bypass structure, pressure passageway of removing heat by catharsis is opened in advance on one side when valve opening, cavity pressure difference before and after flap is reduced, be convenient to opening of valve, existing inner bypass stop valve valve rod when opening first drives secondary flap to move up, secondary flap is removed seal the main relief hole of main valve clack, open bypass passageways pressure release, after secondary valve flap contacts to valve clack cover, in continuation, poppet-valve bar is by secondary flap, valve clack cover drives main valve clack to move upward, valve is just opened.The problem that when although above-mentioned prior art solves valve opening, pressure is excessive, but add the stroke of the valve rod required for valve opening, the time of valve opening is longer, needs the use occasion of opening/shutting valve within a short period of time not obviously to be a kind of solution of understanding to some.
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 rapid starting and stopping check valve, and it can not only realize the switching controlling functions of fluid medium, and it is little to open and close moment, open and close rapidly, actuation time is short.
In order to solve the problems of the technologies described above, a kind of internal bypass rapid starting and stopping check 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, and described valve rod is spun by lower thread section and secondary flap, and the lower end sealing surface of secondary flap is relative with the main relief hole sealing surface on flap, secondary flap is arranged in flap hole movably, is provided with secondary flap circumference limit stoper between secondary flap and flap; Described flap sidewall has guide's relief hole, and flap upper end is provided with valve clack cover, and valve clack cover endoporus is less than secondary flap cylindrical, is provided with axial clearance between valve clack cover and secondary flap, is provided with flap circumference limit stoper in valve body.
In said structure, because described valve rod is spun by lower thread section and secondary flap, the lower end sealing surface of secondary flap is relative with the main relief hole sealing surface on flap, secondary flap is arranged in flap hole movably, be provided with secondary flap circumference limit stoper between secondary flap and flap, then when valve rod positive and negative direction rotates, spacing owing to being subject to circumference, the secondary flap be screwed on lower thread section can move up and down along stem shaft, thus can open or close main relief hole in flap hole, again due to described flap sidewall having guide's relief hole, flap upper end is provided with valve clack cover, valve clack cover endoporus is less than secondary flap cylindrical, axial clearance is provided with between valve clack cover and secondary flap, flap circumference limit stoper is provided with in valve body, then when secondary flap to move up along with the rotation of valve rod open main relief hole time, guide's relief hole that flap sidewall is opened is communicated with main relief hole, the flowing medium with pressure on the upside of flap can make it to the pressure pressure release on the upside of flap by guide's relief hole and the main relief hole Cavity Flow on the downside of flap, alleviate the active force of pressure to flap of flowing medium, when secondary flap continues to move up the axial clearance covered between valve clack cover and secondary flap, inside secondary flap top to valve clack cover, flap can be driven to move upward and open valve, due to flap move upward before flowing medium obtain pressure release, flap can be opened more easily, thus achieve the little requirement of valve opening and closing moment, in the process, because valve rod is spun by thread section and valve gap, when valve rod rotates, secondary flap and flap do not move up and down by means of only the lower thread section effect of valve rod, but also can move up and down relative to valve gap and valve body along with valve rod, like this, valve rod often turns around, the axial distance of flap movement will be threaded stem section and lower thread section pitch sum, if threaded stem section is equal with lower thread section pitch, the speed being then equivalent to flap unlatching is doubled, thus reaches the requirement that keying is rapid, actuation time is short.
A kind of preferred implementation of the present utility model, the distance between described guide's relief hole lower edge to main relief hole sealing surface is less than the axial clearance between valve clack cover and secondary flap.Adopt this mode of execution, can ensure to be opened to guide's relief hole before valve clack cover on the secondary flap top that moves up, thus ensure flap before opening flowing medium obtained pressure release, valve keying moment little.
Another kind of preferred implementation of the present utility model, the main relief hole sealing surface on the lower end sealing surface of described secondary flap and flap is the conical surface.Adopt this mode of execution, conical surface seal sealing effect compared with plane sealing will be got well, and secondary flap lower end sealing surface is when being the conical surface, the obstruction stroke of secondary flap to guide's relief hole can be reduced, even can accomplish incomplete obstruction to guide's relief hole, can also accelerate opening of guide's relief hole further like this, make flowing medium pressure release faster, pressure release is more abundant.
Another preferred implementation of the present utility model, described secondary flap circumference limit stoper comprises the axial groove that secondary flap cylindrical has and the secondary flap limited post be arranged on flap sidewall, and secondary flap limited post is plugged in the axial groove on secondary flap cylindrical.Adopt this mode of execution, its limit structure is succinct, easily manufactured.
The further preferred implementation of the utility model, described flap circumference limit stoper comprises the flap limited post be arranged on flap sidewall and the limiting stopper be arranged on inside valve gap, flap limited post is plugged in the restraining groove of limiting stopper, and this restraining groove is along stem shaft to setting.Adopt this mode of execution, the circumference of its flap is spacing can, conveniently by installing a limiting stopper to realize on valve gap, not needed to do larger change to the structure of valve body.
Another further preferred implementation of the utility model, described secondary flap limited post and flap limited post are overall structure.Adopt this mode of execution, only need install a bounding means on flap sidewall and can realize the circumference of flap and secondary flap spacing simultaneously, structure is simple, and mounting and adjusting is convenient.
Accompanying drawing explanation
Structure Figure and specific embodiment below, is described in further detail the utility model internal bypass rapid starting and stopping check valve.
Fig. 1 is the structural representation of a kind of embodiment of the utility model internal bypass rapid starting and stopping check valve;
Fig. 2 is the partial enlarged drawing at flap position in structure shown in Fig. 1.
In figure: thread section, 7-valve clack cover, 8-valve rod, 9-valve gap, 10-seal section, 11-thread section, 12-handwheel, the main relief hole of 13-, 14-guide's relief hole under the secondary flap of 1-valve body, 2-flap, 3-, 4-secondary flap circumference limit stoper, the secondary flap limited post of 41-, 5-flap circumference limit stoper, 51-flap limited post, 52-limiting stopper, 6-.
Embodiment
In the internal bypass rapid starting and stopping check valve shown in Fig. 1 and Fig. 2, valve gap 9 is sealedly and fixedly connected on valve body 1, valve rod 8 passes valve gap 9 through seal section 10, valve rod 8 is also spun by thread section 11 and valve gap 9, outboard end and the handwheel 12 of valve rod 8 are connected, when rotating handwheel 12, valve rod 8 produces and moves up and down, the medial extremity of valve rod 8 is provided with lower thread section 6, valve rod 8 is spun with secondary flap 3 by lower thread section 6, secondary flap 3 is arranged in the flap hole, upper end of flap 2 movably, flap 2 lower end surface is sealed working face and corresponding with the sealing surface of valve body 1, flap 2 lower center has main relief hole 13, the lower end sealing surface of secondary flap 3 is corresponding with main relief hole 13 sealing surface on flap 2, main relief hole 13 sealing surface on the lower end sealing surface of secondary flap 3 and flap 2 is conical surface, flap 2 sidewall has guide's relief hole 14, flap 2 upper end is provided with valve clack cover 7, valve clack cover 7 is set on valve rod 8, valve clack cover 7 endoporus is less than secondary flap 3 cylindrical, axial clearance is provided with between valve clack cover 7 and secondary flap 3, distance between described guide's relief hole 14 lower edge to main relief hole 13 sealing surface is less than the axial clearance between valve clack cover 7 and secondary flap 3, a secondary flap circumference limit stoper 4 is provided with between secondary flap 3 and flap 2, this secondary flap circumference limit stoper 4 comprises the axial groove that secondary flap 3 cylindrical has and the secondary flap limited post 41 be arranged on flap 2 sidewall, and secondary flap limited post 41 is plugged in the axial groove on secondary flap 3 cylindrical, a flap circumference limit stoper 5 is provided with in valve body 1, this flap circumference limit stoper 5 comprises the flap limited post 51 be arranged on flap 2 sidewall and the limiting stopper 52 be arranged on inside valve gap 9, flap limited post 51 is plugged in the restraining groove of limiting stopper 52, this restraining groove is axially arranged along valve rod 8, and secondary flap limited post 41 and flap limited post 51 are overall structure.
In the course of the work, by handwheel 12 rotation valve rod 8, valve rod 8 is moved down, simultaneously due to the effect of secondary flap circumference limit stoper 4 and flap circumference limit stoper 5, secondary flap 3 is also moving down relative to valve rod 8, flap 2 is driven to move down fast through secondary flap 3 like this, sealing surface between secondary flap 3 and flap 2 and between flap 2 and valve body 1 is all rapidly turned off, and valve is in closed condition, when rotating backward handwheel 12, valve rod 8 moves upward, simultaneously due to the effect of secondary flap circumference limit stoper 4 and flap circumference limit stoper 5, secondary flap 3 is also moving up relative to valve rod 8, sealing surface between secondary flap 3 and flap 2 is rapidly opened, guide's relief hole 14 that flap 2 sidewall is opened is communicated with main relief hole 13, the flowing medium with pressure on the upside of flap 2 makes it to the pressure pressure release on the upside of flap 2 by Cavity Flow on the downside of flap 2 of guide's relief hole 14 and main relief hole 13, alleviate the pressure of flowing medium to the active force of flap 2, when secondary flap 3 continues to move up the axial clearance covered between valve clack cover 7 and secondary flap 3 under the drive of valve rod 8, secondary flap 3 pushes up inside valve clack cover 7, flap 2 is driven to move upward through valve clack cover 7, the flowing medium with pressure now on the upside of flap 2 is owing to obtaining leading pressure release, the active force of flap 2 is reduced, flap 2 can be opened more like a cork, thus the moment of valve opening and closing is greatly reduced, and open and close rapidly, actuation time is short.
Below preferred implementations more of the present utility model are only listed, but the utility model is not limited in this, more improvement and conversion can also be made, as described in secondary flap limited post 41 may not be overall structure with flap limited post 51, but discrete two parts; Described secondary flap circumference limit stoper 4 or flap circumference limit stoper 5 also can arrange many places at circumferencial direction, and described secondary flap circumference limit stoper 4 also can be made up of the dive key between flap 2 endoporus and secondary flap 3 cylindrical.And so on, as long as improvement done on the utility model basic principle basis and conversion, all should be considered as falling in the utility model protection domain.
Claims (6)
1. an internal bypass rapid starting and stopping check valve, comprise valve body (1), valve gap (9), valve rod (8), flap (2), described valve rod (8) through seal section (10) through valve gap (9), valve rod (8) is also spun by thread section (11) and valve gap (9), it is characterized in that: described valve rod (8) is spun by lower thread section (6) and secondary flap (3), the lower end sealing surface of secondary flap (3) is corresponding with main relief hole (13) sealing surface on flap (2), secondary flap (3) is arranged in flap hole movably, secondary flap circumference limit stoper (4) is provided with between secondary flap (3) and flap (2), described flap (2) sidewall has guide's relief hole (14), flap (2) upper end is provided with valve clack cover (7), valve clack cover (7) endoporus is less than secondary flap (3) cylindrical, be provided with axial clearance between valve clack cover (7) and secondary flap (3), in valve body (1), be provided with flap circumference limit stoper (5).
2. internal bypass rapid starting and stopping check valve according to claim 1, is characterized in that: the distance between described guide's relief hole (14) lower edge to main relief hole (13) sealing surface is less than the axial clearance between valve clack cover (7) and secondary flap (3).
3. internal bypass rapid starting and stopping check valve according to claim 1, is characterized in that: main relief hole (13) sealing surface on the lower end sealing surface of described secondary flap (3) and flap (2) is the conical surface.
4. internal bypass rapid starting and stopping check valve according to claim 1, it is characterized in that: described secondary flap circumference limit stoper (4) comprises the axial groove that secondary flap (3) cylindrical has and the secondary flap limited post (41) be arranged on flap (2) sidewall, and secondary flap limited post (41) is plugged in the axial groove on secondary flap (3) cylindrical.
5. internal bypass rapid starting and stopping check valve according to claim 1, it is characterized in that: described flap circumference limit stoper (5) comprises the flap limited post (51) be arranged on flap (2) sidewall and the limiting stopper (52) being arranged on valve gap (9) inner side, flap limited post (51) is plugged in the restraining groove of limiting stopper (52), and this restraining groove is axially arranged along valve rod (8).
6. the internal bypass rapid starting and stopping check valve according to claim 4 or 5, is characterized in that: described secondary flap limited post (41) and flap limited post (51) are overall structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420517335.6U CN204061925U (en) | 2014-09-10 | 2014-09-10 | Internal bypass rapid starting and stopping check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420517335.6U CN204061925U (en) | 2014-09-10 | 2014-09-10 | Internal bypass rapid starting and stopping check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204061925U true CN204061925U (en) | 2014-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420517335.6U Active CN204061925U (en) | 2014-09-10 | 2014-09-10 | Internal bypass rapid starting and stopping check valve |
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| CN (1) | CN204061925U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377163A (en) * | 2020-11-12 | 2021-02-19 | 中国石油大学(华东) | Ultrahigh pressure sand prevention fracturing valve |
-
2014
- 2014-09-10 CN CN201420517335.6U patent/CN204061925U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377163A (en) * | 2020-11-12 | 2021-02-19 | 中国石油大学(华东) | Ultrahigh pressure sand prevention fracturing valve |
| CN112377163B (en) * | 2020-11-12 | 2022-04-29 | 中国石油大学(华东) | Ultrahigh pressure sand prevention fracturing valve |
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