CN204387416U - The dark bar screw down nonreturn valve of sphere - Google Patents
The dark bar screw down nonreturn valve of sphere Download PDFInfo
- Publication number
- CN204387416U CN204387416U CN201420789825.1U CN201420789825U CN204387416U CN 204387416 U CN204387416 U CN 204387416U CN 201420789825 U CN201420789825 U CN 201420789825U CN 204387416 U CN204387416 U CN 204387416U
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- CN
- China
- Prior art keywords
- valve
- valve rod
- flap
- stuffing box
- gap
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- 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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Abstract
The utility model discloses the dark bar screw down nonreturn valve of a kind of sphere, described valve bonnet seal lid is put on valve body, valve seat is provided with in valve body, flap is positioned at valve body and contacts with valve base sealing, it also includes Stem Mut and nut gland, described valve gap, stuffing box and Gland offer corresponding valve rod hole respectively, also restraining groove is offered at the valve rod hole place of valve gap, described valve rod is provided with annular stop plate, valve rod is plugged in the valve rod hole of valve gap, and the annular stop plate on valve rod is positioned at the restraining groove of valve gap, described stuffing box is nested with on valve rod by its valve rod hole, and the annular stop plate pressure of valve rod is put in the restraining groove of valve gap, the valve rod hole place of described stuffing box offers packing groove, packing seal is placed in the packing groove of stuffing box, the utility model advantage is: the utility model structural design is very reasonable, by structural design cleverly, perfection achieves uniting two into one of two kinds of valve function.
Description
Technical field
The utility model relates to the technical field of valve, more particularly relates to the technical field of safety check.
Background technique
Valve is the device being used for controlling the direction of fluid, pressure and flow in fluid system, valve mainly includes gate valve, stop valve, safety check, membrane valve, ball valve, stopcock, dish valve, plunger valve and ball valve etc., the sealability of valve refers to that each sealed department steric hindrance of valve stops the ability of dielectric leakage, and it is the most important technical performance index of valve.There are three places at the sealing position of valve: one is the contacting point between open-shut device and valve seat two sealing surface; Two is cooperation places of filler and valve rod and stuffing box; Three is joints of valve body and valve gap.Wherein the leakage at the first place is called interior leakage, namely usually saidly fits badly, and it blocks the ability of medium by affecting valve.For block valve class, interior leakage is unallowed.The leakage at rear two places is called and leaks outside, and namely medium is from valve internal leakage to valve.Leak outside and can cause loss of material, befouling environment, also can cause the accident time serious.For inflammable and explosive, poisonous or have the medium of radiation, leak outside unallowable especially, thus valve must have reliable sealability.Wherein stop valve is the type in valve, it is also known as pipe valve valve, belong to forced seal formula valve, so when valve closing, pressure must be applied to flap, do not leak with forced seal face, the closed principle of stop valve relies on valve rod pressure, valve clack sealing surface and sealing surface of seat are fitted tightly, stop medium circulation, the opening and closing of this stop valve must rely on control bolt rotary manually or automatically to realize completely, its flap can not be opened voluntarily or close, particularly when reverse flow appears in valve in-vivo medium, can not effectively stop, easily bring potential safety hazard, in addition, when flap action, valve rod all can move up and down in company with flap straight line on valve gap, therefore, the mobile space that stop valve must give valve rod certain in use, otherwise stop valve just cannot action.Safety check refers to and relies on medium itself to flow and can open and close automatically the valve of flap, it belongs to a kind of automatic valve, its Main Function preventing medium from flowing backwards, preventing pump and drive motor reversion and the releasing, also known as making check valve, one-way valve, reflux valve and back pressure valve of vessel media.Though this safety check can realize opening and closing automatically flap, but it opens and closes action not by manual control, does not have cutoff function during medium forward flow.
Model utility content
The purpose of this utility model provides a kind of reasonable in design to solve above-mentioned deficiency exactly, not only there is the forced sealing function of stop valve, but also the automatic braking with safety check prevents the function of adverse current, simultaneously when flap action, valve rod can not move up and down in company with flap straight line in valve gap, the dark bar screw down nonreturn valve of sphere that the place being particularly suitable for being subject to strict restriction in space uses.
The technical solution that the utility model adopts to solve the problems of the technologies described above is as follows:
The dark bar screw down nonreturn valve of sphere, it mainly includes valve body, valve gap, valve rod, stuffing box, filler, Gland and flap, described valve bonnet seal lid is put on valve body, valve seat is provided with in valve body, flap is positioned at valve body and contacts with valve base sealing, it also includes Stem Mut and nut gland, described valve gap, stuffing box and Gland offer corresponding valve rod hole respectively, also restraining groove is offered at the valve rod hole place of valve gap, described valve rod is provided with annular stop plate, valve rod is plugged in the valve rod hole of valve gap, and the annular stop plate on valve rod is positioned at the restraining groove of valve gap, described stuffing box is nested with on valve rod by its valve rod hole, and the annular stop plate pressure of valve rod is put in the restraining groove of valve gap, the valve rod hole place of described stuffing box offers packing groove, packing seal is placed in the packing groove of stuffing box, described Gland is nested with on valve rod by its valve rod hole, and filler pressure is put in the packing groove of stuffing box, the described valve rod lower end being positioned at valve body is provided with screw thread, the entirety of described flap is column, the flap lower end spherically shape of this column, the flap of this column offers center hole, the aperture place of this center hole is provided with screw thread, described nut gland is provided with screw thread, this nut gland is located on the center hole aperture place of flap by its screw thread, described Stem Mut is positioned at the center hole of flap, nut gland offers central through bore, the lower end of described valve rod is threaded with the Stem Mut in flap center hole through the central through bore of nut gland.
The described valve rod annular limiting board being positioned at valve gap valve rod hole restraining groove is respectively arranged with bearing up and down.
Described being positioned between the Stem Mut of flap center hole and nut gland is reserved with 3 to 10 centimetres of spacing.
Offer guiding groove outside described flap, be provided with guiding gusset being positioned at the guiding groove corresponding section of valve body with flap, the guiding gusset in described valve body is positioned at the guiding groove outside flap.
The inside top valve rod hole place of described valve gap is provided with the conical surface, is provided with the spherical shape corresponding with this conical surface being positioned on nut gland.
The beneficial effect that the utility model adopts above-mentioned technical solution to reach is: the utility model structural design is very reasonable, when valve rod rotates, valve rod can not move up and down as straight line in company with flap, be particularly suitable for using in the place that space is subject to strict restriction, this valve is not only provided with the forced sealing function of stop valve, but also the automatic braking being provided with safety check prevents the function of adverse current, by structural design cleverly, perfection achieves uniting two into one of two kinds of valve function.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model flap;
Fig. 3 is the plan structure schematic diagram of Fig. 2.
Embodiment
By Fig. 1, shown in Fig. 2 and Fig. 3, the dark bar screw down nonreturn valve of sphere, it mainly includes valve body 1, valve gap 2, valve rod 3, stuffing box 4, filler 5, Gland 6, flap 7, Stem Mut 8 and nut gland 9, described valve gap 2 sealing cover is put on valve body 1, valve seat 10 is provided with in valve body 1, flap 7 is positioned at valve body 1 and is sealed with valve seat 10 by its lower end and contacts, described valve gap 2, stuffing box 4 and Gland 6 offer corresponding valve rod hole respectively, restraining groove 11 is also offered at the valve rod hole place of valve gap 2, described valve rod 3 is provided with annular stop plate 12, valve rod 3 is plugged in the valve rod hole of valve gap 2, and the annular stop plate 12 on valve rod 3 is positioned at the restraining groove 11 of valve gap 2, in order to improve flexibility when valve rod 3 rotates, bearing 13 is respectively arranged with at the valve rod 3 annular stop plate about 12 being positioned at valve gap 2 valve rod hole restraining groove 11, described stuffing box 4 is nested with on valve rod 3 by its valve rod hole, and the annular stop plate 12 of valve rod 3 is put in the restraining groove 11 of valve gap 2 by bearing 13 pressure, the valve rod hole place of described stuffing box 4 offers packing groove 14, filler 5 sealing is placed in the packing groove 14 of stuffing box 4, described Gland 6 is nested with on valve rod 3 by its valve rod hole, and filler 5 pressure is put in the packing groove 14 of stuffing box 4, described valve rod 3 lower end being positioned at valve body 1 is provided with screw thread 15, the entirety of described flap 7 is column, the flap 7 lower end spherically shape of this column, the flap 7 of this column offers center hole 16, the aperture place of this center hole 16 is provided with screw thread, described nut gland 9 is provided with screw thread, this nut gland 9 is located on the center hole 16 aperture place of flap 7 by its screw thread, described Stem Mut 8 is positioned at the center hole 16 of flap 7, nut gland 9 offers central through bore, the lower end of described valve rod 3 is threaded with the Stem Mut 8 in flap 7 center hole 16 through the central through bore of nut gland 9, be positioned between the Stem Mut 8 of flap 7 center hole 16 and nut gland 9 and be reserved with 3 to 10 centimetres of spacing, after Stem Mut 8 rises under the rotary action of valve rod 3, flap 7 can be in up and down state, be provided with the function of safety check, rotate in the circumferential to prevent flap 7, guiding groove 17 is offered outside described flap 7, guiding groove 17 corresponding section being positioned at valve body 1 and flap 7 is provided with guiding gusset, guiding gusset in described valve body 1 is positioned at the guiding groove 17 outside flap 7, leakage phenomenon is there is after being fully elevated to prevent flap 7, the inside top valve rod hole place being positioned at valve gap 2 is provided with the conical surface 18, be provided with the spherical shape 19 corresponding with this conical surface 18 being positioned on nut gland 9, when flap 7 is promoted to top dead center, sealed with the conical surface 18 forming surface at valve gap 2 top by the spherical shape 19 of nut gland 9.
Claims (5)
1. the dark bar screw down nonreturn valve of sphere, it mainly includes valve body, valve gap, valve rod, stuffing box, filler, Gland and flap, described valve bonnet seal lid is put on valve body, valve seat is provided with in valve body, flap is positioned at valve body and contacts with valve base sealing, it is characterized in that: it also includes Stem Mut and nut gland, described valve gap, stuffing box and Gland offer corresponding valve rod hole respectively, also restraining groove is offered at the valve rod hole place of valve gap, described valve rod is provided with annular stop plate, valve rod is plugged in the valve rod hole of valve gap, and the annular stop plate on valve rod is positioned at the restraining groove of valve gap, described stuffing box is nested with on valve rod by its valve rod hole, and the annular stop plate pressure of valve rod is put in the restraining groove of valve gap, the valve rod hole place of described stuffing box offers packing groove, packing seal is placed in the packing groove of stuffing box, described Gland is nested with on valve rod by its valve rod hole, and filler pressure is put in the packing groove of stuffing box, the described valve rod lower end being positioned at valve body is provided with screw thread, the entirety of described flap is column, the flap lower end spherically shape of this column, the flap of this column offers center hole, the aperture place of this center hole is provided with screw thread, described nut gland is provided with screw thread, this nut gland is located on the center hole aperture place of flap by its screw thread, described Stem Mut is positioned at the center hole of flap, nut gland offers central through bore, the lower end of described valve rod is threaded with the Stem Mut in flap center hole through the central through bore of nut gland.
2. the dark bar screw down nonreturn valve of sphere according to claim 1, is characterized in that: described in be positioned at valve gap valve rod hole restraining groove valve rod annular limiting board be respectively arranged with bearing up and down.
3. the dark bar screw down nonreturn valve of sphere according to claim 1 and 2, is characterized in that: described in be positioned between the Stem Mut of flap center hole and nut gland and be reserved with 3 to 10 centimetres of spacing.
4. the dark bar screw down nonreturn valve of sphere according to claim 1 and 2, it is characterized in that: outside described flap, offer guiding groove, be provided with guiding gusset being positioned at the guiding groove corresponding section of valve body with flap, the guiding gusset in described valve body is positioned at the guiding groove outside flap.
5. the dark bar screw down nonreturn valve of sphere according to claim 1 and 2, is characterized in that: the inside top valve rod hole place of described valve gap is provided with the conical surface, is provided with the spherical shape corresponding with this conical surface being positioned on nut gland.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420789825.1U CN204387416U (en) | 2014-12-15 | 2014-12-15 | The dark bar screw down nonreturn valve of sphere |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420789825.1U CN204387416U (en) | 2014-12-15 | 2014-12-15 | The dark bar screw down nonreturn valve of sphere |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204387416U true CN204387416U (en) | 2015-06-10 |
Family
ID=53360138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420789825.1U Expired - Fee Related CN204387416U (en) | 2014-12-15 | 2014-12-15 | The dark bar screw down nonreturn valve of sphere |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204387416U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104565458A (en) * | 2014-12-15 | 2015-04-29 | 湖北力拓阀业有限公司 | Spherical non-rising-stem stop check valve |
-
2014
- 2014-12-15 CN CN201420789825.1U patent/CN204387416U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104565458A (en) * | 2014-12-15 | 2015-04-29 | 湖北力拓阀业有限公司 | Spherical non-rising-stem stop check 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: 20150610 Termination date: 20161215 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |