CN208871042U - A kind of needle-like shut-off valve - Google Patents
A kind of needle-like shut-off valve Download PDFInfo
- Publication number
- CN208871042U CN208871042U CN201821653356.5U CN201821653356U CN208871042U CN 208871042 U CN208871042 U CN 208871042U CN 201821653356 U CN201821653356 U CN 201821653356U CN 208871042 U CN208871042 U CN 208871042U
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- China
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- valve
- stuffing box
- valve rod
- valve body
- needle
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Abstract
The utility model discloses a kind of needle valves, are related to valve technology field.The utility model includes handle, stuffing box, valve body and valve rod, stuffing box is threaded on valve body, valve rod is threadedly coupled through stuffing box and with stuffing box, taper valve is arranged in stem bottom, flap and valve-stem integrated form, and heap is welded with hard alloy on flap, are provided with relief hole on valve body, relief hole is connected to dielectric cavity, and pressure release screw is equipped at relief hole.Needle-like shut-off valve provided by the present application can greatly prolong the service life of needle valve, and favorable sealing property.
Description
Technical field
The utility model relates to valve technology fields, more specifically to a kind of needle-like shut-off valve.
Background technique
The characteristics of needle-like shut-off valve include structure it is simple, for ease of maintenaince, manufacturing cost it is cheap etc., but the adjusting essence of throttle valve
It spends not high, it is difficult to use as control valve, simultaneously because velocity of medium is higher between flap and valve seat in valve, be easy to appear
Cavitation phenomenons, therefore part need to use the material of resistance to cavitation, and be unsuitable for cutting medium and be used.
Current needle-like shut-off valve for power station, oil refining, chemical industry setting and instrument measurement, as in pipeline fluid dredge
Effect that is logical and shutting off, with needle-like shut-off valve being widely used in petrochemical industry, the requirement to needle-like shut-off valve is obvious
It improving, existing needle-like shut-off valve service life is low, poor sealing performance, and it is frequent to replace, it is cumbersome.
Utility model content
In order to overcome above-mentioned defect existing in the prior art and deficiency, this application provides a kind of needle-like shut-off valves, originally
The goal of the invention of utility model is to solve the problem of the short poor sealing performance of needle valve service life in the prior art, the application
The needle-like shut-off valve of offer can greatly prolong the service life of needle valve, and favorable sealing property.
In order to solve above-mentioned problems of the prior art, the application is achieved through the following technical solutions:
A kind of needle-like shut-off valve, including handle, stuffing box, valve body and valve rod, be provided on the valve body medium entrance and
Media outlet, it is characterised in that: the stuffing box is threaded on valve body, crowds around to form Jie between the stuffing box and valve body
Matter cavity, the medium entrance are connected to by intake channel with dielectric cavity, and the media outlet passes through exit passageway and medium
Cavity connection；For the valve rod through stuffing box and being threadedly coupled with stuffing box, stem bottom is arranged taper valve, the flap and
Valve-stem integrated molding, the flap are overlapped with the axis of valve rod, and heap is welded with hard alloy on the flap, the intake channel
Axis is overlapped with the axis of valve rod；It is provided with sealing ring between the valve rod and stuffing box, is provided with sealing ring on the valve rod
Slot, the sealing ring are mounted in closure gasket groove, and the sealing ring acts between valve rod and stuffing box；It is arranged on the valve body
There is relief hole, the relief hole is connected to dielectric cavity, and pressure release screw is equipped at the relief hole.
The handle is mounted on valve stem top by installing nuts and washers.
The joint place that the stuffing box is connect with valve body is provided with gasket.
The working principle of the utility model is:
When valve is closed, handle is rotated clockwise, the valve rod being fixed together with handle is driven to rotate, valve rod and stuffing box are logical
Threaded connection is crossed, and stuffing box is connected as one with being threadedly secured on valve body, when valve rod rotates clockwise, is moved downward, when
When stem movement is sealed to the taper valve of heap hard alloy and valve body import channel, the closing work of valve is completed.
When valve is opened, handle is rotated counterclockwise, the valve rod being fixed together with handle is driven to rotate, valve rod and stuffing box are logical
Threaded connection is crossed, and stuffing box is connected as one with being threadedly secured on valve body, when valve rod rotates counterclockwise, is moved upwards, when
When stem movement is detached to the syringe needle of heap hard alloy and valve body import channel, the unlatching work of valve is completed.
Compared with prior art, the beneficial technical effects brought by the utility model are as follows:
The needle-like shut-off valve of the utility model is by valve body, gasket, stuffing box, handle, valve rod, sealing ring, pressure release screw
Equal components composition.Stuffing box is threadedly coupled with valve body in structure, and stuffing box plays the role of valve deck and stuffing-box, structure
Simply, compact；On valve body design have pressure relief opening and screw thread, very convenient connection fairlead pressure release or sampling, can it is appropriate into
Row pressure release extends the service life of needle valve；Two seals annular groove is designed on valve rod, two sealing rings are on valve rod, shape
At two seals, avoid seal under high pressures packing seal not tight, the leakage of medium；Stem design is top screw thread, lower end simultaneously
Taper valve integral structure, ensure that valve rod in the opening-closing process of valve to neutrality；The lower end taper valve position of valve rod
Heap hard alloy ensure that intensity, erosive wear resistance and service life in high-pressure medium erosion.
Detailed description of the invention
Fig. 1 is the utility model schematic cross-sectional view；
Appended drawing reference: 1, valve body, 2, gasket, 3, stuffing box, 4, installation nut, 5, handle, 6, washer, 7, valve rod, 8,
Sealing ring, 9, pressure release screw, 10, relief hole, 11, medium entrance, 12, media outlet, 13, intake channel, 14, exit passageway,
15, dielectric cavity, 16, taper valve.
Specific embodiment
Embodiment 1
As one preferred embodiment of the utility model, referring to Figure of description 1, present embodiment discloses:
A kind of needle-like shut-off valve, including handle 5, stuffing box 3, valve body 1 and valve rod 7, be provided on the valve body 1 medium into
Mouth 11 and media outlet 12, the stuffing box 3 are threaded on valve body 1, crowd around to be formed between the stuffing box 3 and valve body 1
Dielectric cavity 15, the medium entrance 11 are connected to by intake channel 13 with dielectric cavity 15, and the media outlet 12 is by going out
Mouth channel 14 is connected to dielectric cavity 15；The valve rod 7 is threadedly coupled through stuffing box 3 and with stuffing box 3, and 7 bottom of valve rod is set
Taper valve 16 is set, the flap and valve rod 7 are integrally formed, and the flap is overlapped with the axis of valve rod 7, built-up welding on the flap
There is hard alloy, the axis of the intake channel 13 is overlapped with the axis of valve rod 7；It is provided between the valve rod 7 and stuffing box 3
Sealing ring 8；Relief hole 10 is provided on the valve body 1, the relief hole 10 is connected to dielectric cavity 15, at the relief hole 10
Pressure release screw 9 is installed.
Embodiment 2
As the utility model another embodiment, referring to Figure of description 1, present embodiment discloses:
A kind of needle-like shut-off valve, including handle 5, stuffing box 3, valve body 1 and valve rod 7, be provided on the valve body 1 medium into
Mouth 11 and media outlet 12, the stuffing box 3 are threaded on valve body 1, crowd around to be formed between the stuffing box 3 and valve body 1
Dielectric cavity 15, the medium entrance 11 are connected to by intake channel 13 with dielectric cavity 15, and the media outlet 12 is by going out
Mouth channel 14 is connected to dielectric cavity 15；The valve rod 7 is threadedly coupled through stuffing box 3 and with stuffing box 3, and 7 bottom of valve rod is set
Taper valve 16 is set, the flap and valve rod 7 are integrally formed, and the flap is overlapped with the axis of valve rod 7, built-up welding on the flap
There is hard alloy, the axis of the intake channel 13 is overlapped with the axis of valve rod 7；It is provided between the valve rod 7 and stuffing box 3
Sealing ring 8；Relief hole 10 is provided on the valve body 1, the relief hole 10 is connected to dielectric cavity 15, at the relief hole 10
Pressure release screw 9 is installed.The handle 5 is mounted on 7 top of valve rod by installation nut 4 and washer 6.The stuffing box 3 and valve
The joint place that body 1 connects is provided with gasket 2.
Embodiment 3
As the utility model another embodiment, referring to Figure of description 1, present embodiment discloses:
A kind of needle-like shut-off valve, including handle 5, stuffing box 3, valve body 1 and valve rod 7, be provided on the valve body 1 medium into
Mouth 11 and media outlet 12, the stuffing box 3 are threaded on valve body 1, crowd around to be formed between the stuffing box 3 and valve body 1
Dielectric cavity 15, the medium entrance 11 are connected to by intake channel 13 with dielectric cavity 15, and the media outlet 12 is by going out
Mouth channel 14 is connected to dielectric cavity 15；The valve rod 7 is threadedly coupled through stuffing box 3 and with stuffing box 3, and 7 bottom of valve rod is set
Taper valve 16 is set, the flap and valve rod 7 are integrally formed, and the flap is overlapped with the axis of valve rod 7, built-up welding on the flap
There is hard alloy, the axis of the intake channel 13 is overlapped with the axis of valve rod 7；It is provided between the valve rod 7 and stuffing box 3
Sealing ring 8；Relief hole 10 is provided on the valve body 1, the relief hole 10 is connected to dielectric cavity 15, at the relief hole 10
Pressure release screw 9 is installed.The handle 5 is mounted on 7 top of valve rod by installation nut 4 and washer 6.The stuffing box 3 and valve
The joint place that body 1 connects is provided with gasket 2.8 slot of sealing ring is provided on the valve rod 7, the sealing ring 8 is mounted on sealing
In 8 slot of ring, the sealing ring 8 is acted between valve rod 7 and stuffing box 3.
The working principle of the utility model is:
When valve is closed, handle 5 is rotated clockwise, drives the valve rod 7 being fixed together with handle 5 to rotate, valve rod 7 and filler
Box 3 is connected through a screw thread, and stuffing box 3 is connected as one with being threadedly secured on valve body 1, when valve rod 7 rotates clockwise, to
Lower movement completes the pass of valve when valve rod 7 moves to the taper valve 16 of heap hard alloy and 1 intake channel 13 of valve body seals
Close work.
When valve is opened, handle 5 is rotated counterclockwise, drives the valve rod 7 being fixed together with handle 5 to rotate, valve rod 7 and filler
Box 3 is connected through a screw thread, and stuffing box 3 is connected as one with being threadedly secured on valve body 1, when valve rod 7 rotates counterclockwise, to
Upper movement completes the unlatching work of valve when valve rod 7 moves to the syringe needle of heap hard alloy and 1 intake channel 13 of valve body is detached from.
The needle-like shut-off valve of the utility model by valve body 1, gasket 2, stuffing box 3, handle 5, valve rod 7, sealing ring 8, let out
Press the components compositions such as screw 9.Stuffing box 3 is threadedly coupled with valve body 1 in structure, and stuffing box 3 plays valve deck and stuffing-box
Effect, structure is simple, compact；Design has pressure relief opening and screw thread, very convenient connection fairlead pressure release or sampling on valve body 1,
Can carry out pressure release appropriate, extend the service life of needle valve；8 slot of two seals ring, two sealing rings are designed on valve rod 7
8 on valve rod 7, forms two seals, avoids seal under high pressures packing seal not tight, the leakage of medium；Valve rod 7 designs simultaneously
For top screw thread, 16 integral structure of lower end taper valve, ensure that valve rod 7 in the opening-closing process of valve to neutrality；Valve rod 7
16 position heap hard alloy of lower end taper valve, ensure that intensity, erosive wear resistance and the use in high-pressure medium erosion
Service life.
Claims (3)
1. a kind of needle-like shut-off valve, including handle (5), stuffing box (3), valve body (1) and valve rod (7), it is arranged on the valve body (1)
There are medium entrance (11) and media outlet (12), it is characterised in that: the stuffing box (3) is threaded on valve body (1), described
Crowd around to be formed dielectric cavity (15) between stuffing box (3) and valve body (1), the medium entrance (11) by intake channel (13) with
Dielectric cavity (15) connection, the media outlet (12) are connected to by exit passageway (14) with dielectric cavity (15)；The valve rod
(7) through stuffing box (3) and being threadedly coupled with stuffing box (3), taper valve (16) are arranged in valve rod (7) bottom, the flap and
Valve rod (7) is integrally formed, and the flap is overlapped with the axis of valve rod (7), and heap is welded with hard alloy, the import on the flap
The axis in channel (13) is overlapped with the axis of valve rod (7)；Sealing ring (8) are provided between the valve rod (7) and stuffing box (3),
Sealing ring (8) slot is provided on the valve rod (7), the sealing ring (8) is mounted in sealing ring (8) slot, the sealing ring (8)
It acts between valve rod (7) and stuffing box (3)；It is provided with relief hole (10) on the valve body (1), the relief hole (10) and Jie
Matter cavity (15) is connected to, and is equipped with pressure release screw (9) at the relief hole (10).
2. a kind of needle-like shut-off valve as described in claim 1, it is characterised in that: the handle (5) by installation nut (4) and
Washer (6) is mounted at the top of valve rod (7).
3. a kind of needle-like shut-off valve as described in claim 1, it is characterised in that: what the stuffing box (3) connect with valve body (1)
Joint place is provided with gasket (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821653356.5U CN208871042U (en) | 2018-10-12 | 2018-10-12 | A kind of needle-like shut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821653356.5U CN208871042U (en) | 2018-10-12 | 2018-10-12 | A kind of needle-like shut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208871042U true CN208871042U (en) | 2019-05-17 |
Family
ID=66469915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821653356.5U Active CN208871042U (en) | 2018-10-12 | 2018-10-12 | A kind of needle-like shut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208871042U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109357027A (en) * | 2018-11-16 | 2019-02-19 | 重庆宗星机械有限责任公司 | A kind of combined type shut-off valve |
| CN112555496A (en) * | 2020-12-28 | 2021-03-26 | 科哲(上海)阀门有限公司 | Needle-shaped stop valve for special gas |
| CN112833194A (en) * | 2019-11-25 | 2021-05-25 | 中国石油天然气股份有限公司 | Needle valve |
-
2018
- 2018-10-12 CN CN201821653356.5U patent/CN208871042U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109357027A (en) * | 2018-11-16 | 2019-02-19 | 重庆宗星机械有限责任公司 | A kind of combined type shut-off valve |
| CN112833194A (en) * | 2019-11-25 | 2021-05-25 | 中国石油天然气股份有限公司 | Needle valve |
| CN112555496A (en) * | 2020-12-28 | 2021-03-26 | 科哲(上海)阀门有限公司 | Needle-shaped stop valve for special gas |
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