CN203757163U - Stop valve with corrugated tube - Google Patents
Stop valve with corrugated tube Download PDFInfo
- Publication number
- CN203757163U CN203757163U CN201420161269.3U CN201420161269U CN203757163U CN 203757163 U CN203757163 U CN 203757163U CN 201420161269 U CN201420161269 U CN 201420161269U CN 203757163 U CN203757163 U CN 203757163U
- Authority
- CN
- China
- Prior art keywords
- bellows
- valve
- valve rod
- corrugated tube
- boss
- 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 - Fee Related
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Abstract
The utility model discloses a stop valve with a corrugated tube. The stop valve comprises a hand wheel (14), an upper valve stem (2), a valve bonnet (1), a lower valve stem (9) and a valve body, wherein the upper end of the lower valve stem (9) is mounted in an upper valve stem plunger (11) in a sleeved manner and connected with the upper valve stem (2) via a clamp ring (3), an upper half portion of the valve body is a tube (11), a boss is arranged on the inner sidewall of the tube (11), a seal ring (12) is placed on the boss, a corrugated tube upper disc (6) is placed on the seal ring (12), a compression plug screw (5) is mounted on the corrugated tube upper disc (6), a corrugated tube (7) axially sleeves the lower vale stem (9), a corrugated inner ring (13) is arranged in the upper end of the corrugated tube (7), and a corrugated lower disc (10) is arranged outside the lower end of the corrugated tube (7). The stop valve with the corrugated tube has the advantages of reliable sealing, stable medium temperature, convenience in maintenance and multiple insured seals.
Description
Technical field
The utility model relates to valve field, a kind of stop valve with bellows particularly using on vacuum pipe.
Background technique
At present, the general packing seal structure adopting in the valve rod place of cut-off valve, prevents that gas medium from leaking outside.Filler is sleeved on around valve rod, then with Gland, compresses filler, makes filler hold valve rod tightly and forms sealing.Because filler is held valve rod tightly, can make valve opening and close difficulty and strengthen, being not closed completely, causing interior leakage, when valve is repeatedly opened or closes, valve rod and filler do relative motion, and can cause the wearing and tearing of filler, after a period of time, it is large that gap between valve rod and seal ring becomes, also can cause gas medium to leak outside, therefore need constantly to adjust Gland and compress filler, gas medium can not leaked outside.
What at present general stop valve adopted is the polytetrafluoroethylsealed sealed circle sealing of stuffing box, a kind of chlor-alkali sealed by pneumatic corrugated pipe cut-off valve of for example describing in Chinese utility model patent CN201320354036.0, it fills and realizes double seal with filler between bonnet and bottom flange, but filler is in use fragile, and on vacuum and low temperature pipeline, can not effectively solve the problem of medium and heat exchange with outside and vacuum pipe prerequisite lower valve is safeguarded and easily damaged parts changes part not destroying.
Model utility content
The purpose of this utility model is to overcome the shortcoming of prior art, provides in vacuum and low temperature pipeline that a kind of sealing reliability is high, long service life and the ultralow temperature stop valve with bellows easy to maintenance.
The purpose of this utility model is achieved through the following technical solutions: a kind of stop valve with bellows, it comprises handwheel, upper valve rod, valve gap, lower valve rod and valve body, lower valve rod upper end is sleeved in upper valve rod tamponade and is connected by snap ring with upper valve rod, the first half of valve body is pipe, on the madial wall of pipe, be provided with boss, on boss, be placed with seal ring, on seal ring, be placed with disk on bellows, compression plug screw is installed on disk on bellows, on lower valve rod axial direction, be set with bellows, inside, bellows upper end is provided with ring in bellows, insert in bellows on ring and bellows between disk bellows upper end, then be welded as a whole, bellows lower end outer installment has bellows lower disc, insert between bellows lower disc and lower valve rod boss bellows lower end, then be welded as a whole.
The boss top of described inside tube wall offers internal thread.
Described compression plug screw offers the outside thread matching with IPT, compresses plug screw and is threaded connection on the internal surface that is sleeved on pipe.
The utlity model has following advantage: the stop valve with bellows of the present utility model, it is reliable that it has sealing, the medium of valve pocket inside cannot produce heat exchange with the external world, makes medium temperature stable, has double insurance and does not destroy convenient for maintaining under vacuum pipe prerequisite.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model
In figure, 1-valve gap, 2-upper valve rod, 3-snap ring, the tamponade of 4-upper valve rod, 5-compresses plug screw, disk on 6-bellows, 7-bellows, 8-lower valve rod boss, 9-lower valve rod, 10-bellows lower disc, 11-pipe, 12-seal ring, ring in 13-bellows, 14-handwheel.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described, protection domain of the present utility model is not limited to the following stated:
As shown in Figure 1, a kind of stop valve with bellows, it comprises handwheel 14, upper valve rod 2, valve gap 1, lower valve rod 9 and valve body, lower valve rod 9 upper ends are sleeved in upper valve rod tamponade 4 and are connected by snap ring 3 with upper valve rod 2, the first half of valve body is pipe 11, on the madial wall of pipe 11, be provided with boss, the boss top of pipe 11 madial walls offers internal thread, on boss, be placed with seal ring 12, on seal ring 12, be placed with disk 6 on bellows, on bellows, on disk 6, be provided with and compress plug screw 5, compress plug screw 5 and offer the outside thread matching with pipe 11 internal threads, compressing plug screw 5 is threaded connection on the internal surface that is sleeved on pipe 11, on lower valve rod 9 axial directions, be set with bellows 7, bellows 7 inside, upper end are provided with ring 13 in bellows, insert in bellowss on ring 13 and bellows between disk 6 bellows 7 upper ends, then be welded as a whole, bellows 7 lower end outer installment have bellows lower disc 10, insert between bellows lower disc 10 and lower valve rod boss 8 bellows 7 lower ends, then be welded as a whole.
Working procedure of the present utility model is as follows: because the utility model is mainly used on vacuum pipe, and the outer thermal insulation pipe of vacuum pipe will be welded on the flange plate of valve body of the present utility model upper end, therefore when handwheel 14 rotations drive lower valve rod 9 to move up and down, bellows 7 is compression or stretching thereupon, medium is all sealed in the valve pocket of valve body, and can not rise in valve gap 1, do not produce heat exchange with extraneous, thereby guaranteed the temperature constant of pipeline internal medium.
Claims (3)
1. the stop valve with bellows, it comprises handwheel (14), upper valve rod (2), valve gap (1), lower valve rod (9) and valve body, it is characterized in that: lower valve rod (9) upper end is sleeved in upper valve rod tamponade (4) and is connected by snap ring (3) with upper valve rod (2), the first half of valve body is pipe (11), on the madial wall of pipe (11), be provided with boss, on boss, be placed with seal ring (12), on seal ring (12), be placed with disk on bellows (6), on disk on bellows (6), be provided with and compress plug screw (5), on lower valve rod (9) axial direction, be set with bellows (7), bellows (7) inside, upper end is provided with ring (13) in bellows, insert in bellows on ring (13) and bellows between disk (6) bellows (7) upper end, then be welded as a whole, bellows (7) lower end outer installment has bellows lower disc (10), insert between bellows lower disc (10) and lower valve rod boss (8) bellows (7) lower end, then be welded as a whole.
2. a kind of stop valve with bellows according to claim 1, is characterized in that: the boss top of described pipe (11) madial wall offers internal thread.
3. a kind of stop valve with bellows according to claim 1, it is characterized in that: described compression plug screw (5) offers the outside thread matching with pipe (11) internal thread, compress plug screw (5) and be threaded connection on the internal surface that is sleeved on pipe (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420161269.3U CN203757163U (en) | 2014-04-04 | 2014-04-04 | Stop valve with corrugated tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420161269.3U CN203757163U (en) | 2014-04-04 | 2014-04-04 | Stop valve with corrugated tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203757163U true CN203757163U (en) | 2014-08-06 |
Family
ID=51252440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420161269.3U Expired - Fee Related CN203757163U (en) | 2014-04-04 | 2014-04-04 | Stop valve with corrugated tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203757163U (en) |
-
2014
- 2014-04-04 CN CN201420161269.3U patent/CN203757163U/en not_active Expired - Fee Related
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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: 20140806 Termination date: 20200404 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |