CN207454802U - A kind of inside screw nonrising stem type gate valve for improving sealing performance - Google Patents
A kind of inside screw nonrising stem type gate valve for improving sealing performance Download PDFInfo
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- CN207454802U CN207454802U CN201721442591.3U CN201721442591U CN207454802U CN 207454802 U CN207454802 U CN 207454802U CN 201721442591 U CN201721442591 U CN 201721442591U CN 207454802 U CN207454802 U CN 207454802U
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Abstract
The utility model is related to a kind of inside screw nonrising stem type gate valves for improving sealing performance, include the handwheel of valve body, valve deck, gland, valve rod, valve stem nut, the flashboard of connected valve stem nut and connected valve rod, valve rod sequentially passes through gland from top to bottom, valve deck stretches into valve body, and by the valve stem nut of its threaded connection flashboard is driven to move up and down realization opening and closing；It is characterized in that between the gland top valve stem via input end and valve rod, setting is sleeved on the sealing ring that on valve rod and outside is provided with ring week groove, be correspondingly arranged with the ring week groove and its lower part cell wall indent shoulder of the top surface with ring week flange on the gland top valve stem via input end, gland by the sealing ring ring week groove and its lower part cell wall respectively with the ring week flange and indent shoulder are mutually chimeric is connected with valve stem seal；Valve deck lower port and the joint face of mouth in valve body are sealed by O-ring；Valve rod is supported on by the shaft shoulder being integrally designed with it on valve deck shoulder.
Description
Technical field
The utility model is related to a kind of gate valve more particularly to a kind of inside screw nonrising stem type gate valves for improving sealing performance.
Background technology
Gate valve is used for connecting or blocking the medium in pipeline as a kind of of block valve class, is indispensable in fluid line
Control device, be widely used in the oil of the departments such as oil, chemical industry, metallurgy, electric power, water conservancy, urban construction, fire-fighting, on gas and water pipeline
As the headstock gear for connecting or blocking medium in pipeline.
Its structure of now widely used inside screw nonrising stem type gate valve is as shown in Figure 1, mainly include valve body 1, valve deck 6, gland 9, valve rod
3rd, valve stem nut 4, flashboard 2 and handwheel 13,6 upper port of valve deck are tightly connected with gland 9, and 6 lower port of valve deck and mouth in valve body 1 are close
Envelope connection；Valve rod 3 is supported on by the divided ring 14 in sleeping groove mounted in its on valve deck shoulder 15 in body of rod ring week, and valve rod 3 is worn
It crosses sequentially connected gland 9, valve deck 6 from top to bottom and stretches into valve body 1, and flashboard 2 is driven by the valve stem nut 4 of its threaded connection
Move up and down realization opening and closing.
Main problem existing for existing inside screw nonrising stem type gate valve is：(1) leakproofness is defective, as shown in Figure 1, above-mentioned inside screw nonrising stem type gate valve
In, multiple ring week grooves are equipped with along valve rod on the valve rod hole inner wall at 9 center of gland, gland 9 is by being inlaid in ring week groove
In O-ring 12 be tightly connected with valve rod 3, but since 9 top valve stem via input end of gland is contacted directly with valve rod 3, without
Sealing, therefore gap is formed, both easily dielectric leakage was also resulted in into dust；(2) 6 lower port of valve decks and the flange of mouth in valve body 1 connect
Place is met, is sealed by the plate seal pad 5 of setting, since 6 lower port end face of valve deck is plane, plate seal pad 5 is also
Plane, and belong to the flat seal of larger area, under larger pressure medium, easily leak.(3) valve rods 3 are mounted in its body of rod by sleeping
Divided ring 14 in ring week groove is supported on valve deck shoulder 15, and this Split type structure, the rigging error of part is big, influences valve
Open and close the accuracy of stroke.How to solve the above problems as industry concerned issue.
Utility model content
The main purpose of the utility model is that in view of the above-mentioned problems, provide it is a kind of improve sealing performance inside screw nonrising stem type gate valve,
By adding and improving sealing structure, Gate-valve sealing performance, and then improvement stem structure are improved, reaches valve rigging error and subtracts
It is small, open and close the effect that stroke accuracy improves and assembling structure simplifies.
Technical solution is used by the utility model solves its technical problem：
A kind of inside screw nonrising stem type gate valve for improving sealing performance, including valve body, valve deck, gland, valve rod, valve stem nut, connected valve rod
The handwheel of the flashboard of nut and connected valve rod, valve deck upper port are tightly connected with gland, and valve deck lower port is sealed with mouth in valve body
Connection；Valve rod sequentially passes through gland from top to bottom, valve deck stretches into valve body, and drives flashboard by the valve stem nut of its threaded connection
Move up and down realization opening and closing；It is characterized in that between the gland top valve stem via input end and valve rod, setting is sleeved on
On valve rod and outside is provided with the sealing ring of ring week groove, on the gland top valve stem via input end with the ring week groove
And its lower part cell wall be correspondingly arranged top surface with ring week flange indent shoulder, gland by the sealing ring ring week groove and
Its underpart cell wall is mutually chimeric with the ring week flange and indent shoulder respectively and is connected with valve stem seal.
The valve deck lower port and the joint face of mouth in valve body are sealed by O-ring.
The valve rod is supported on by the shaft shoulder being integrally designed with it on valve deck shoulder.
The beneficial effects of the utility model are：Compared with the prior art, (1) due to gland top valve stem via input end with
Sealing ring is additionally arranged between valve rod, realizes sealing, not only anti-dust but also has prevented medium from revealing；(2) in valve decks lower port and valve body
The joint face of mouth is sealed by O-ring, is significantly improved than existing plate seal pad leakproofness；(3) valve rod adds integral shaft shoulder generation
Original separating member divided ring has been replaced, valve rod is made to be contacted directly with valve deck, has reduced the rigging error of part, improves valve
Uniformity is assembled, so as to also improve the accuracy of valve opening and closing stroke, and simplifies valve rod assembling structure.
Description of the drawings
Fig. 1 is the structure diagram of inside screw nonrising stem type gate valve of the prior art；
Fig. 2 is the structure diagram of the inside screw nonrising stem type gate valve of raising sealing performance provided by the utility model；
Fig. 3 is the I enlarged drawings in Fig. 2.
In figure：
1 valve body, 2 flashboards, 3 valve rods, 4 valve stem nuts, 5 plate seal pads, 6 valve decks, 7-8O type circles, 9 glands, 10 bolts,
11 washers, 12O type circles, 13 handwheels, 14 divided rings, 15 valve deck shoulders, 16 bolts, 17 washers, 18 nuts, 19 indent shoulders, 20
Ring week flange, 21 sealing rings, 22 shaft shoulders, 23O type circles.
The utility model is described in detail below in conjunction with drawings and examples.
Specific embodiment
Fig. 2-3 shows a kind of inside screw nonrising stem type gate valve for improving sealing performance, including valve body 1, valve deck 6, gland 9, valve rod 3, valve rod
The handwheel 13 of nut 4, the flashboard 2 of connected valve stem nut 4 and connected valve rod 3,6 upper port of valve deck are tightly connected with gland 9, valve deck
Lower port is tightly connected with mouth in valve body；Valve rod 3 sequentially passes through gland 9 from top to bottom, valve deck 6 stretches into valve body 1, and passes through its spiral shell
The valve stem nut 4 of line connection drives flashboard 2 to move up and down realization opening and closing.
As shown in figure 3, the utility model be characterized in that the 9 top valve stem via input end of gland and valve rod 3 it
Between, setting is sleeved on the sealing ring 21 that on valve rod and outside is provided with ring week groove, in the 9 top valve stem via input end of gland
Upper to be correspondingly arranged indent shoulder 19 of the top surface with ring week flange 20 with the ring week groove and its lower part cell wall, gland 9 passes through
The sealing ring 21 ring week groove and its lower part cell wall it is mutually chimeric with its flange 20 and indent shoulder 19 respectively in ring week and with
Valve rod 3 is tightly connected.
The further feature of the utility model passes through O-ring 23 in the joint face of the mouth in above-mentioned 6 lower port of valve deck and valve body
Sealing.Due to being provided with the ring week groove of sleeping dress O-ring on 6 lower port joint face of valve deck, using the O-ring of circular cross section
23, compared with the plate seal pad 5 of the prior art, sealing performance significantly improves, and will not be leaked under larger Fluid pressure.
The utility model is further characterized in that above-mentioned valve rod 3 is supported on valve deck shoulder by the shaft shoulder 22 being integrally designed with it
On 15.Due to the shaft shoulder 22 of one, instead of original separating member divided ring 14, valve rod 3 being made to be contacted directly with valve deck 6, is subtracted
The rigging error of small part improves the assembling uniformity of valve, so as to also improve the accuracy of valve opening and closing stroke, and valve
Bar assembling structure simplifies.
More than content is not the limitation made to the structure, shape and material of the utility model in any form.Every foundation
Any simple modification, equivalent change and modification that the technical essence of the utility model makees above example still falls within this
In the range of utility model technical solution.
Claims (3)
1. a kind of inside screw nonrising stem type gate valve for improving sealing performance, including valve body, valve deck, gland, valve rod, valve stem nut, connected valve rod spiral shell
Female flashboard and the handwheel of connected valve rod, valve deck upper port are tightly connected with gland, and valve deck lower port connects with mouth sealing in valve body
It connects；Valve rod sequentially passes through gland from top to bottom, valve deck stretches into valve body, and is driven by the valve stem nut of its threaded connection on flashboard
Lower mobile realize is opened and closed；It is characterized in that between the gland top valve stem via input end and valve rod, setting is sleeved on valve
On bar and outside is provided with the sealing ring of ring week groove, on the gland top valve stem via input end with the ring week groove and
Its underpart cell wall be correspondingly arranged top surface with ring week flange indent shoulder, gland by the sealing ring ring week groove and its
Lower part cell wall is mutually chimeric with the ring week flange and indent shoulder respectively and is connected with valve stem seal.
A kind of 2. inside screw nonrising stem type gate valve for improving sealing performance according to claim 1, it is characterised in that the valve deck lower port
It is sealed with the joint face of mouth in valve body by O-ring.
3. a kind of inside screw nonrising stem type gate valve for improving sealing performance according to claim 1 or 2, it is characterised in that the valve rod passes through
The shaft shoulder being integrally designed with it is supported on valve deck shoulder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721442591.3U CN207454802U (en) | 2017-11-01 | 2017-11-01 | A kind of inside screw nonrising stem type gate valve for improving sealing performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721442591.3U CN207454802U (en) | 2017-11-01 | 2017-11-01 | A kind of inside screw nonrising stem type gate valve for improving sealing performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207454802U true CN207454802U (en) | 2018-06-05 |
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ID=62253179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721442591.3U Active CN207454802U (en) | 2017-11-01 | 2017-11-01 | A kind of inside screw nonrising stem type gate valve for improving sealing performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207454802U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798389A (en) * | 2019-01-30 | 2019-05-24 | 天津富赛克流体控制设备有限公司 | Gate valve with anti-wear gasket |
-
2017
- 2017-11-01 CN CN201721442591.3U patent/CN207454802U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798389A (en) * | 2019-01-30 | 2019-05-24 | 天津富赛克流体控制设备有限公司 | Gate valve with anti-wear gasket |
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