CN201034168Y - Ultra-low-temperature block valve - Google Patents
Ultra-low-temperature block valve Download PDFInfo
- Publication number
- CN201034168Y CN201034168Y CNU2007200371859U CN200720037185U CN201034168Y CN 201034168 Y CN201034168 Y CN 201034168Y CN U2007200371859 U CNU2007200371859 U CN U2007200371859U CN 200720037185 U CN200720037185 U CN 200720037185U CN 201034168 Y CN201034168 Y CN 201034168Y
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- China
- Prior art keywords
- valve
- stuffing box
- neck
- seal ring
- valve gap
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- Expired - Fee Related
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Abstract
The utility model discloses a low-temperature block valve, comprising a valve body, a valve cap, a valve core, a valve stem and a handwheel; wherein, the valve core is positioned in the hollow chamber of the valve body and a plurality of pipeline coupling flanges are arranged at both ends of the valve body; the valve cap is provided with a lengthened neck; the upper end of the valve stem extends out of the valve cap and is connected with the handwheel, while the lower end is connected with the valve core. The utility model is characterized in that: the neck of the valve cap is divided into two sections above the stuffing box; external threads are arranged at the top part of the lower section and internal threads matched with the external threads at the top part of the lower sectionare arranged at the bottom part of the upper section. The utility model has the advantages of cancelling the weld joints below the sealing part, needing no ray detection, therefore saving cost and shortening the delivery term, having no leakage and freezing, and being flexible for operation no matter at ON or OFF states when the valves are used.
Description
Technical field
The utility model relates to a kind of low temperature (operating temperature is lower than-100 ℃) warehousing and transportation facilities of liquid gas and ultralow temperature block valve in the associated pipe of being applied to.
Background technique
Block valve claims cut-off valve again, and its effect is the medium of connecting or blocking in the pipeline.The ultralow temperature block valve is meant and is applicable to the block valve of medium temperature in the pipeline break-make below-100 ℃; commonly used is ultra-low temperature throttle valve and ultralow temperature stop valve; usually by valve body; open-shut device in the valve body; the valve cover structure of valve rod and derivation valve rod constitutes; the open-shut device structure of gate valve and stop valve is different; but its valve gap all adopts the lengthening valve cover structure; purpose is to play the function of protection filler and stuffing box; prevent because filler follows the string gradually along with the reduction of temperature under low-temperature condition; thereby cause the medium seepage to cause filler and valve rod to freeze; influence the normal running of valve rod, and filler is pulled the leakage that causes.
According to international state-of-the-art technology code requirement, for ultralow temperature stop valve and gate valve, on needing, last sealing moves on to the stuffing box bottom, and as far as possible near stuffing box, the valve gap part of can avoiding like this extending takes place to boost unusually when valve opening.The valve gap elongated portion is called the neck of block valve again, and for reaching above-mentioned code requirement, in the prior art, the valve gap elongated portion will adopt welding manner to realize sealing moving usually, and weld seam is positioned at the below of neck stuffing box, thereby unavoidably will bear pressure medium.For the reliability and the welding quality that guarantee valve, radiographic inspection will be adopted in the weld seam position, so not only increases cost, also can increase the delivery date of product.
Thereby, how to solve the weld seam problem of ultralow temperature stop valve neck, can improve the reliability of valve, reduce manufacture cost, by those skilled in the art are paid close attention to.
Summary of the invention
The utility model purpose provides a kind of ultralow temperature block valve, by the improvement to its neck structure, solves the weld seam problem, to improve the reliability of valve.
For achieving the above object, the technical solution adopted in the utility model is: a kind of ultralow temperature block valve, comprise valve body, valve gap, spool, valve rod and handwheel, spool is positioned at the cavity of valve body, the valve body two ends are provided with pipeline connecting flange, described valve gap has the neck of lengthening, the valve rod upper end is stretched out valve gap and is connected with handwheel, the lower end is connected with spool, described valve gap neck divides above stuffing box and is broken into two sections, the top of hypomere is provided with outside thread, and the bottom of epimere is provided with the internal thread that cooperates with the hypomere tip male thread.
In the technique scheme, the spool of block valve is a prior art, can adopt gate valve structure or stop valve structure.Because cut-out point is positioned at the stuffing box top, Sealing can be put into by stuffing box, and there is not weld seam in the position of valve gap neck under stuffing box.
In the technique scheme, the stuffing box bottom of described neck is provided with seal ring and gland nut, inner ring cooperates with sealed department on the valve rod bottom male cone (strobilus masculinus) and the valve gap contact seal of seal ring bottom, seal ring, is filler gasket ring and filler on the described gland nut.Seal ring is by pack into stuffing box bottom of the stuffing box in the valve gap, and contacts with valve gap by the conical surface of seal ring, and the seal ring conical surface is realized cure process by the mode of built-up welding cobalt-based, has guaranteed sealing effect.
In the technique scheme, described gland nut and stuffing box chamber wall are through being threaded.Provide pretightening force by screw thread to gland nut, this pretightening force passes to seal ring, thereby realizes the sealing of seal ring and valve gap.
Because the utilization of technique scheme, the utility model compared with prior art has following advantage:
1. because the utility model is arranged on the top of stuffing box with connection part, puts into Sealing by stuffing box, thereby can cancel the weld seam under Sealing, do not need to carry out radiographic inspection, thereby saved cost, shortened delivery date.
2. during valve uses, no matter open or closed condition is not all leaked, do not freeze card, flexible operation.
Description of drawings
Accompanying drawing 1 is the utility model embodiment one a structural representation;
Accompanying drawing 2 is the local enlarged diagram of Fig. 1;
Accompanying drawing 3 is the utility model embodiment two a structural representation;
Wherein: 1, valve body 2, valve gap 3, spool 4, valve rod 5, handwheel 6, stuffing box; 7, seal ring; 8, gland nut; 9, filler gasket ring; 10, filler.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment one:
Shown in accompanying drawing 1 and accompanying drawing 2, a kind of ultralow temperature stop valve, comprise valve body 1, valve gap 2, spool 3, valve rod 4 and handwheel 5, spool is positioned at the cavity of valve body, and the valve body two ends are provided with pipeline connecting flange, described spool adopts the block valve structure, be to be provided with in the valve cavity and the vertically arranged valve seat of valve rod, be communicated with the valve body two ends respectively, the below of valve rod is a flap, described flap cooperates with valve seat, constitutes on-off structure; Described valve gap has the neck of lengthening, the valve rod upper end is stretched out valve gap and is connected with handwheel, the lower end is connected with spool, described valve gap neck divides above stuffing box 6 and is broken into two sections, the top of hypomere is provided with outside thread, the bottom of epimere is provided with the internal thread that cooperates with the hypomere tip male thread, the stuffing box bottom of described neck is provided with seal ring 7 and gland nut 8, the male cone (strobilus masculinus) and valve gap 2 contact seals of seal ring bottom, seal ring bottom inner ring cooperates with sealed department on the valve rod 4, be filler gasket ring 9 and filler 10 on the described gland nut 8, described gland nut and stuffing box 6 chamber walls are through being threaded.
Because cut-out point is positioned at the stuffing box top, Sealing can be put into by stuffing box, there is not weld seam in the position of valve gap 2 necks under stuffing box 6, the stuffing box bottom of described neck is provided with seal ring 7 and gland nut 8, the male cone (strobilus masculinus) and the valve gap contact seal of seal ring bottom, seal ring bottom inner ring cooperates with sealed department on the valve rod 4, is filler gasket ring 9 and filler 10 on the described gland nut.Seal ring is by pack into stuffing box bottom of the stuffing box in the valve gap, and contacts with valve gap by the conical surface of seal ring, and the seal ring conical surface is realized cure process by the mode of built-up welding cobalt-based, has guaranteed sealing effect.
Embodiment two:
Shown in accompanying drawing 3 and accompanying drawing 4, a kind of ultra-low temperature throttle valve, comprise valve body 1, valve gap 2, spool 3, valve rod 4 and handwheel 5, spool is positioned at the cavity of valve body, the valve body two ends are provided with pipeline connecting flange, described spool adopts gate valve structure, described valve gap has the neck of lengthening, the valve rod upper end is stretched out valve gap and is connected with handwheel, the lower end is connected with spool, and described valve gap neck divides above stuffing box and is broken into two sections, and the top of hypomere is provided with outside thread, the bottom of epimere is provided with the internal thread that cooperates with the hypomere tip male thread, the stuffing box of described neck bottom is provided with seal ring and gland nut, male cone (strobilus masculinus) and the valve gap contact seal of seal ring bottom, and inner ring cooperates with sealed department on the valve rod bottom the seal ring, be filler gasket ring and filler on the described gland nut, gland nut and stuffing box chamber wall are through being threaded.
Because cut-out point is positioned at the stuffing box top, Sealing can be put into by stuffing box, there is not weld seam in the position of valve gap 2 necks under stuffing box, the stuffing box bottom of described neck is provided with seal ring and gland nut, the male cone (strobilus masculinus) and the valve gap contact seal of seal ring bottom, seal ring bottom inner ring cooperates with sealed department on the valve rod, is filler gasket ring and filler on the described gland nut.Seal ring is by pack into stuffing box bottom of the stuffing box in the valve gap, and contacts with valve gap by the conical surface of seal ring, and the seal ring conical surface is realized cure process by the mode of built-up welding cobalt-based, has guaranteed sealing effect.
Claims (3)
1. ultralow temperature block valve, comprise valve body [1], valve gap [2], spool [3], valve rod [4] and handwheel [5], spool is positioned at the cavity of valve body, the valve body two ends are provided with pipeline connecting flange, and described valve gap has the neck of lengthening, and the valve rod upper end is stretched out valve gap and is connected with handwheel, the lower end is connected with spool, it is characterized in that: described valve gap neck is broken into two sections at the top branch of stuffing box [6], and the top of hypomere is provided with outside thread, and the bottom of epimere is provided with the internal thread that cooperates with the hypomere tip male thread.
2. ultralow temperature block valve according to claim 1, it is characterized in that: the stuffing box bottom of described neck is provided with seal ring [7] and gland nut [8], the male cone (strobilus masculinus) and valve gap [2] contact seal of seal ring bottom, seal ring bottom inner ring cooperates with sealed department on the valve rod [4], is filler gasket ring [9] and filler [10] on the described gland nut.
3. ultralow temperature block valve according to claim 2 is characterized in that: described gland nut [8] and stuffing box [6] chamber wall are through being threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200371859U CN201034168Y (en) | 2007-04-28 | 2007-04-28 | Ultra-low-temperature block valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200371859U CN201034168Y (en) | 2007-04-28 | 2007-04-28 | Ultra-low-temperature block valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201034168Y true CN201034168Y (en) | 2008-03-12 |
Family
ID=39195059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200371859U Expired - Fee Related CN201034168Y (en) | 2007-04-28 | 2007-04-28 | Ultra-low-temperature block valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201034168Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117108805A (en) * | 2023-10-18 | 2023-11-24 | 东一阀门制造(南通)有限公司 | Ultra-low temperature valve extension valve gap structure |
-
2007
- 2007-04-28 CN CNU2007200371859U patent/CN201034168Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117108805A (en) * | 2023-10-18 | 2023-11-24 | 东一阀门制造(南通)有限公司 | Ultra-low temperature valve extension valve gap structure |
| CN117108805B (en) * | 2023-10-18 | 2023-12-29 | 东一阀门制造(南通)有限公司 | Ultra-low temperature valve extension valve gap structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215011 No. 999, Xiangjiang Road, New District, Jiangsu, Suzhou Patentee after: Neway Valve (Suzhou) Co., Ltd. Address before: 215011 No. 999, Xiangjiang Road, New District, Jiangsu, Suzhou Patentee before: Suzhou Neway Valve Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080312 Termination date: 20160428 |