CN205244407U - Ultra -low temperature hand stop valve - Google Patents
Ultra -low temperature hand stop valve Download PDFInfo
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- CN205244407U CN205244407U CN201521024359.9U CN201521024359U CN205244407U CN 205244407 U CN205244407 U CN 205244407U CN 201521024359 U CN201521024359 U CN 201521024359U CN 205244407 U CN205244407 U CN 205244407U
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Abstract
Ultra -low temperature hand stop valve, which comprises the following components: a valve body, a valve cove, the hand wheel, valve clack and valve rod, the valve body top uncovered and with the valve gap under end screw thread connection, inside cavity of valve body and valve body runner direction adopt to hang down and into exceed, in the valve pocket between the valve body is imported and exported the system have with the mutual roof pressure complex valve seat seal face of valve clack, valve rod and valve gap coaxial line set up, the valve rod with the axial insert establish in the valve gap and stretch into the valve body inside, sealing connection and valve rod lower part and valve gap lower part threaded connection between valve rod and the valve gap, valve rod upper end and hand wheel fixed connection, the valve clack is located the valve body, valve rod lower extreme and the cooperation of valve clack joint, the valve clack center is passed to the axial of valve rod, the valve body is about the axis bilateral symmetry of valve rod, still include self -supporting compensation mechanism, the utility model discloses overall structure is compact, sealing performance is good, and the working property is reliable, is fit for being used for the cryogenic engineering field.
Description
Technical field
The utility model belongs to Subzero valve field, is specifically related to a kind of super low temperature manual stop valve.
Background technology
LNG heavy truck, LNG big bus, LNG minibus, city bus and LNG yacht, the vehicles such as LNG motor boat, all utilize the novel energy liquefied natural gas (LNG) of energy-saving safety to replace CNG and traditional gasoline and diesel fuel, on the tank body of carrying LNG, need to use cryogenic globe valve, for cryogenic globe valve, require valve to reach zero external leakage, very high to the gland sealed sealing requirements between valve rod and valve gap, but in the long-term opening-closing process of valve, valve rod produces wearing and tearing to packing seal meeting, sealing property between valve rod and valve gap is declined, generation medium leaks outside, cause serious consequence, in addition, the contact-making surface sealing effectiveness of existing flap and valve seat is poor, and repair and replacement are extremely inconvenient, for above problem, how to improve existing cryogenic globe valve, becomes the problem of needing solution badly.
Utility model content
The utility model is in order to solve weak point of the prior art, and a kind of super low temperature manual stop valve of simple in structure, easy to maintenance, good seal performance is provided.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: super low temperature manual stop valve, comprise valve body, valve gap, handwheel, flap and valve rod, valve body open top is also threaded with valve gap lower end, valve inner hollow, in valve body, be provided with and the flap sealing surface of seat of top interference fit mutually, valve rod and valve gap are coaxially set, valve rod is coaxial to be plugged in valve gap and to stretch into valve inner, between valve rod and valve gap, be tightly connected and stem lower portion is threaded with bonnet lower, valve rod upper end is fixedly connected with handwheel, flap is positioned at valve body, the flap center of axially passing of valve rod, valve rod lower end coordinates with the clamping of flap top, valve body is symmetrical about the axis of valve rod, also comprise self-supporting compensation mechanism, handwheel is provided with the first groove of opening upwards, self-supporting compensation mechanism is positioned at the first groove, self-supporting compensation mechanism comprises Compress Spring, spring capping and stop nut, spring capping is positioned at Compress Spring upper inner, spring capping top outer edge is circumferentially protruded and is provided with pressure ring, spring capping is provided with the second groove, stop nut is positioned at the second groove, spring capping bottom is provided with through hole, valve rod upper end extend in Compress Spring and through after through hole and is threaded with stop nut, the pressure ring top interference fit of Compress Spring upper end and spring capping, the bottom cell wall top interference fit of Compress Spring lower end and the first groove, between valve gap top and valve rod, be filled with filler, valve gap upper end is provided with the gland that compresses filler, is provided with the first sealing gasket between gland and handwheel, flap bottom is provided with sealing hold-down mechanism.
2, super low temperature manual stop valve according to claim 1, it is characterized in that: sealing hold-down mechanism comprises the second sealing gasket that is located at flap bottom, the second sealing gasket and the interference fit of sealing surface of seat top, flap bottom is also provided with the clamp nut for compressing the second sealing gasket, between the second sealing gasket and clamp nut, be provided with pad gland, the external peripheral surface of the second sealing gasket and pad gland and sealing surface of seat are up big and down small taper seat structure, the second sealing gasket and sealing surface of seat crimping and be sealed and matched.
Valve gap is long-neck structure.
Adopt technique scheme, operation principle of the present utility model is: between valve rod and valve gap, play sealing function by filler, and adopt the gland that is located at valve gap upper end to compress filler, what have more optimization is between gland and handwheel, to be provided with the first sealing gasket, and sealing effectiveness is better; Self-supporting compensation mechanism in the first groove on handwheel is by Compress Spring, spring capping and stop nut, after the filler between valve rod and valve gap is impaired, overall sealing performance declines, the now downward pressing handwheel of Compress Spring, handwheel further compresses filler by gland, and can temperature shrinkage self-sufficiency compensate under low-temperature working medium; Flap bottom is provided with sealing hold-down mechanism, and sealing hold-down mechanism comprises clamp nut, pad gland and the second sealing gasket, can strengthen the sealing effectiveness between flap and sealing surface of seat, and detachable maintaining is convenient; Valve gap adopts long-neck structure, to reduce medium temperature, gland sealed is affected.
In sum, the utility model compact overall structure, good seal performance, reliable working performance, is suitable for cryogenic engineering field.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the enlarged drawing at A place in Fig. 1;
Fig. 3 is the enlarged drawing at B place in Fig. 1.
Detailed description of the invention
As Figure 1-3, super low temperature manual stop valve of the present utility model, comprise valve body 1, valve gap 2, handwheel 3, flap 4 and valve rod 5, valve body 1 open top is also threaded with valve gap 2 lower ends, valve body 1 inner hollow and valve body 1 runner direction adopt low in and high out, in valve pocket between valve body 1 import and export, be shaped with the sealing surface of seat 6 with flap 4 mutual top interference fits, valve rod 5 and valve gap 2 are coaxially set, valve rod 5 is coaxial to be plugged in valve gap 2 and to stretch into valve body 1 inside, between valve rod 5 and valve gap 2, be tightly connected and valve rod 5 bottoms are connected with valve gap 2 lower thread, valve rod 5 upper ends are fixedly connected with handwheel 3, flap 4 is positioned at valve body 1, valve rod 5 lower ends coordinate with flap 4 clampings, flap 4 centers of axially passing of valve rod 5, valve body 1 is symmetrical about the axis of valve rod 5, also comprise self-supporting compensation mechanism, handwheel 3 is provided with the first groove 7 of opening upwards, self-supporting compensation mechanism is positioned at the first groove 7, self-supporting compensation mechanism comprises Compress Spring 8, spring capping 9 and stop nut 10, spring capping 9 is positioned at Compress Spring 8 upper inner, spring capping 9 tops are provided with pressure ring 11, spring capping 9 is provided with the second groove 12, stop nut 10 is positioned at the second groove 12, spring capping 9 bottoms are provided with through hole 13, valve rod 5 upper ends extend in Compress Spring 8 and through being threaded with stop nut 10 after through hole 13, the pressure ring 11 top interference fits of Compress Spring 8 upper ends and spring capping 9, the bottom cell wall top interference fit of Compress Spring 8 lower ends and the first groove 7, between valve gap 2 tops and valve rod 5, be filled with filler 14, valve gap 2 upper ends are provided with the gland 15 that compresses filler 14, are provided with the first sealing gasket 16 between gland 15 and handwheel 3, flap 4 bottoms are provided with sealing hold-down mechanism.
Sealing hold-down mechanism comprises the second sealing gasket 17 that is located at flap 4 bottoms, the second sealing gasket 17 and sealing surface of seat 6 top interference fits, flap 4 bottoms are also provided with the clamp nut 18 for compressing the second sealing gasket 17, between the second sealing gasket 17 and clamp nut 18, be provided with pad gland 19, the external peripheral surface of the second sealing gasket 17 and pad gland 19 and sealing surface of seat 6 are up big and down small taper seat structure, and the second sealing gasket 17 is with sealing surface of seat 6 crimping and be sealed and matched.
Valve gap 2 is long-neck structure.
The making selection of valve body is mainly nickel brass (HNi65-5), brass (H62) and silizin (CuZn17Si3), material and working media compatibility are good, avoid between parts, rubbing and producing static in valve body, and safe and reliable under LNG low temperature, the strength of materials is high, long service life.
Operation principle of the present utility model is: between valve rod 5 and valve gap 2, play sealing function by filler 14, and adopt the gland 15 that is located at valve gap 2 upper ends to compress filler 14, what have more optimization is between gland 15 and handwheel 3, to be provided with the first sealing gasket 16, and sealing effectiveness is better; Self-supporting compensation mechanism in the first groove 7 on handwheel 3 is by Compress Spring 8, spring capping 9 and stop nut 10, after the filler 14 between valve rod 5 and valve gap 2 is impaired, overall sealing performance declines, the now downward pressing handwheel 3 of Compress Spring 8, handwheel 3 further compresses filler 14 by gland 15, and can temperature shrinkage self-sufficiency compensate under low-temperature working medium; Flap 4 bottoms are provided with sealing hold-down mechanism, and sealing hold-down mechanism comprises clamp nut 18, pad gland 19 and the second sealing gasket 17, can strengthen the sealing effectiveness between flap 4 and sealing surface of seat 6; Valve gap 2 adopts long-neck structure, impact filler 14 being sealed to reduce medium temperature.
The present embodiment is not done any pro forma restriction to shape of the present utility model, material, structure etc.; any simple modification, equivalent variations and modification that every foundation technical spirit of the present utility model is done above embodiment, all belong to the protection domain of technical solutions of the utility model.
Claims (3)
1. super low temperature manual stop valve, comprise valve body, valve gap, handwheel, flap and valve rod, valve body open top is also threaded with valve gap lower end, valve inner hollow, in valve body, be provided with and the flap sealing surface of seat of top interference fit mutually, valve rod and valve gap are coaxially set, valve rod is coaxial to be plugged in valve gap and to stretch into valve inner, between valve rod and valve gap, be tightly connected and stem lower portion is threaded with bonnet lower, valve rod upper end is fixedly connected with handwheel, flap is positioned at valve body, the flap center of axially passing of valve rod, valve rod lower end coordinates with the clamping of flap top, valve body is symmetrical about the axis of valve rod, it is characterized in that: also comprise self-supporting compensation mechanism, handwheel is provided with the first groove of opening upwards, self-supporting compensation mechanism is positioned at the first groove, self-supporting compensation mechanism comprises Compress Spring, spring capping and stop nut, spring capping is positioned at Compress Spring upper inner, spring capping top outer edge is circumferentially protruded and is provided with pressure ring, spring capping is provided with the second groove, stop nut is positioned at the second groove, spring capping bottom is provided with through hole, valve rod upper end extend in Compress Spring and through after through hole and is threaded with stop nut, the pressure ring top interference fit of Compress Spring upper end and spring capping, the bottom cell wall top interference fit of Compress Spring lower end and the first groove, between valve gap top and valve rod, be filled with filler, valve gap upper end is provided with the gland that compresses filler, is provided with the first sealing gasket between gland and handwheel, flap bottom is provided with sealing hold-down mechanism.
2. super low temperature manual stop valve according to claim 1, it is characterized in that: sealing hold-down mechanism comprises the second sealing gasket that is located at flap bottom, the second sealing gasket and the interference fit of sealing surface of seat top, flap bottom is also provided with the clamp nut for compressing the second sealing gasket, between the second sealing gasket and clamp nut, be provided with pad gland, the external peripheral surface of the second sealing gasket and pad gland and sealing surface of seat are up big and down small taper seat structure, the second sealing gasket and sealing surface of seat crimping and be sealed and matched.
3. super low temperature manual stop valve according to claim 1 and 2, is characterized in that: valve gap is long-neck structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521024359.9U CN205244407U (en) | 2015-12-11 | 2015-12-11 | Ultra -low temperature hand stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521024359.9U CN205244407U (en) | 2015-12-11 | 2015-12-11 | Ultra -low temperature hand stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205244407U true CN205244407U (en) | 2016-05-18 |
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ID=55943486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521024359.9U Active CN205244407U (en) | 2015-12-11 | 2015-12-11 | Ultra -low temperature hand stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205244407U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105782474A (en) * | 2016-05-20 | 2016-07-20 | 海安县区域供水有限公司 | Low-temperature stop valve |
| CN110056533A (en) * | 2019-05-21 | 2019-07-26 | 安徽卧龙泵阀股份有限公司 | A kind of impeller of chemical centrifugal pump locking device |
| CN110274040A (en) * | 2019-07-09 | 2019-09-24 | 南通翔骜液压润滑设备有限公司 | Hydraulic hybrid accumulator shut-off valve |
-
2015
- 2015-12-11 CN CN201521024359.9U patent/CN205244407U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105782474A (en) * | 2016-05-20 | 2016-07-20 | 海安县区域供水有限公司 | Low-temperature stop valve |
| CN110056533A (en) * | 2019-05-21 | 2019-07-26 | 安徽卧龙泵阀股份有限公司 | A kind of impeller of chemical centrifugal pump locking device |
| CN110056533B (en) * | 2019-05-21 | 2024-04-09 | 安徽卧龙泵阀股份有限公司 | Chemical pump impeller locking device |
| CN110274040A (en) * | 2019-07-09 | 2019-09-24 | 南通翔骜液压润滑设备有限公司 | Hydraulic hybrid accumulator shut-off valve |
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| C14 | Grant of patent or utility model | ||
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