CN202992241U - Ultra-low temperature ball valve - Google Patents
Ultra-low temperature ball valve Download PDFInfo
- Publication number
- CN202992241U CN202992241U CN 201220513078 CN201220513078U CN202992241U CN 202992241 U CN202992241 U CN 202992241U CN 201220513078 CN201220513078 CN 201220513078 CN 201220513078 U CN201220513078 U CN 201220513078U CN 202992241 U CN202992241 U CN 202992241U
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- valve
- packing
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- low temperature
- temperature ball
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Abstract
The utility model discloses an ultra-low temperature ball valve. The ultra-low temperature ball valve comprises a valve body, a valve body component, a bearing, a valve ball, a thrust washer, a wound gasket, a valve deck stuffing box, bolts, double-screw bolts, a valve rod, a draining board, valve stem packing, a packing bushing, a packing pressing board, and fastening screws. The ultra-low temperature ball valve is characterized in that the valve body is of an integrated structure, an opening used for installing internals is arranged on the upper portion of the valve body, and a valve deck is provided with an extending neck and the stuffing box. The valve stem packing comprises a gasket, a spring, an upper packing seat, a polytetrafluoroethylene V-type packing group, a partition ring and graphite packing, a packing pressing sleeve and the packing pressing board are fastened through screws and locked with the valve deck stuffing box. The ultra-low temperature ball valve is capable of compensating abrasion of the packing and being reliable in sealing, long in service life and fireproof. The valve stem packing, the packing pressing board, the packing pressing sleeve and the fastening screws are all arranged inside the valve deck stuffing box, and the ultra-low temperature ball valve is compact in structure.
Description
Technical field
The utility model relates to a kind of ball valve, especially is applicable to the ultra-low temperature ball valve of the ultralow temperature media such as liquid oxygen, liquid nitrogen and LNG Liquefied natural gas.
Background technique
In Cryogenic valve, valve intensity and sealability are one of leading indicators of examination ultra-low temperature ball valve quality good or not.Sealability mainly comprises two aspects, i.e. interior sealability and external sealed performance.Interior sealing refers to the seal degree that between valve seat and closure member, medium reached, as the valve ball of ball valve and the sealing between valve seat.External sealed refers to the sealing at stem packing position and the sealing at middle flange gasket position.Do not allow to enter under the special operation condition of atmosphere at some medium, external sealed is more even more important than interior sealing, and its sealing configuration need to satisfy low leakage class.And the valve rod place is due to the wearing and tearing of valve switch, and the pressurized gas that the low-temperature deformation of filler or medium gasification produce very easily produce seal failure.
The general form that adopts single sealing of the sealing at the stem packing position of existing ultra-low temperature ball valve, generally have following problem: (1) because filler is all generally nonmetallic material, its linear expansion coeffcient is more much bigger than metallic stuffing box and valve rod.Therefore the filler of assembling at normal temperatures, after dropping to uniform temperature, its contour projector may cause preload pressure to reduce greater than the contour projector of stuffing hole and valve rod, Here it is general ball valve when the low temperature environment temperature descends, the easy reason of leakage under low pressure.(2) adopt one or more groups disc-shaped spring gasket to carry out pretension to gland stud, though make the pretightening force of filler when low temperature can obtain certain compensation, outer Conncetion cimension is increased.In sum, be badly in need of a kind of intensity on market high, valve stem seal is reliable, compact structure, and long service life also has the ultra-low temperature ball valve of fire-proof function.
Summary of the invention
The utility model provides a kind of intensity high for solving the technical problem that exists in known technology, and valve stem seal is reliable, compact structure, and long service life, and have the ultra-low temperature ball valve of fire-proof function.
The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is:
A kind of ultra-low temperature ball valve, comprise valve body, valve component, bearing, valve ball, thrust washer, spirotallic gasket, valve gap Stuffing box, nut, double-screw bolt, valve rod, stem packing, filler pressing sleeve, hold-down grid, fastening screw trip bolt, it is characterized in that: described valve body is the integral type valve body, valve gap on valve body is for lengthening the valve gap of neck, and valve gap adopts spirotallic gasket to be connected with nut by double-screw bolt with valve body; Described valve ball is positioned in the middle of valve body, is provided with valve seat between valve body and valve ball, and valve ball is connected by bearing with valve body, valve gap, is provided with thrust washer between valve body and valve gap Stuffing box; Described valve gap is provided with draining board, and draining board and valve gap are by being welded to connect; Described valve gap Stuffing box is arranged on the top of valve gap, and hold-down grid, filler pressing sleeve and stem packing are arranged in it; Described stem packing is disposed with packing ring, spring, upper Packing seat, PTFE V-type filler group, spacer ring, graphite packing and hold-down grid from the bottom up, and is connected with the valve gap Stuffing box by fastening screw trip bolt.
Described spring is positioned at stem packing bottom, can provide lasting, stable, evenly reach constant mechanical force, even make in use packing seal of valve wearing and tearing, the minimum pretightening force that the packing seal place needs still can be guaranteed, thereby guarantees the permanently effective of valve packing place's sealing.Upper and lower end at the cylindrical spring of this group compression is respectively arranged with packing ring and upper Packing seat, in order to prevent contacting due to the line at spring and PTFE V-type filler group place and valve gap Stuffing box place the unbalance stress that causes PTFE V-type filler group.
Described PTFE V-type filler group is connected with upper Packing seat, because the bottom is subject to spring force, has the function of auto-compensation when it is subject to the impact of cryogenic media and weares and teares.
Described spacer ring is positioned at the upper surface of PTFE V-type filler group, has spacing effect.
The lower surface of described graphite packing is connected with spacer ring and is compressed by hold-down grid, has good fire-proof function.
All in the valve gap Stuffing box, the upper end of valve gap Stuffing box can directly be connected with actuator, has avoided the use of connection bracket for above-mentioned stem packing assembly, hold-down grid and filler pressing sleeve, makes the structure of valve compacter.
Useful effect of the present utility model is: body strength is high, and valve stem seal is reliable, compact structure, and long service life, and have fire-proof function.
Below disclose the utility model, so it is not to limit the utility model, and all employings are equal to replaces or technological scheme that equivalent transformation obtains, within all dropping on protection domain of the present utility model.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the partial enlarged drawing at A position in Fig. 1;
In figure: 1, valve body; 2, valve component; 3, bearing; 4, valve ball; 5, thrust washer; 6, spirotallic gasket; 7, valve gap; 7-1, valve gap Stuffing box; 7-2, valve gap extend neck; 8, nut; 9, double-screw bolt; 10, valve rod; 11, draining board; 12, stem packing; 12-1, packing ring; 12-2, spring; 12-3, upper Packing seat; 12-4, PTFE V-type filler; 12-4-1, upper PTFE V-type filler; 12-4-2, middle PTFE V-type filler; 12-4-3, lower PTFE V-type filler; 12-5, spacer ring; 12-6, graphite packing; 13, filler pressing sleeve; 14, hold-down grid; 15, fastening screw trip bolt.
Embodiment
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
8. see also Fig. 1-2, a kind of ultra-low temperature ball valve, comprise valve body 1, valve component 2, bearing 3, valve ball 4, thrust washer 5, spirotallic gasket 6, valve gap 7, nut 8, double-screw bolt 9, valve rod 10, draining board 11, stem packing 12, filler pressing sleeve 13, hold-down grid 14, fastening screw trip bolt 15, it is characterized in that described valve body 1 is the integral type valve body, valve ball 4 is positioned in the middle of valve body 1, be provided with valve component 2 between valve body 1 and valve ball 4, be provided with thrust washer 5 between valve body 1 and valve gap 7; Described valve ball 4 is connected by bearing 3 with valve body 1, valve gap 7; Described valve gap 7 is provided with draining board 11, and draining board 11 and valve gap 7 are by being welded to connect; Described valve rod 10 is connected by keyway with valve ball 4, and its top can be connected with handle or actuator.
The inside of valve gap Stuffing box 7-1 described above is provided with hold-down grid 14, filler pressing sleeve 13 and stem packing 12, stem packing 12 is disposed with packing ring 12-1, spring 12-2, upper Packing seat 12-3, PTFE V-type filler group 12-4, spacer ring 12-5 and graphite packing 12-6 from the bottom up, and hold-down grid 14 is connected with valve gap Stuffing box 7 by fastening screw trip bolt 15.
Spring 12-2 described above is positioned at stem packing 12 bottom, can provide lasting, stable, evenly reach constant mechanical force, even make in use packing seal of valve wearing and tearing, the minimum pretightening force that the packing seal place needs still can guarantee, thereby guarantee the permanently effective of valve packing place's sealing.Establish Packing seat 12-3 in the upper end of spring 12-2, in order to prevent because spring 12-2 contacts with the line of PTFE V-type filler group 12-4 the unbalance stress that causes PTFE V-type filler group 12-4.
PTFE V-type filler group 12-4 described above is comprised of upper PTFE V-type filler 12-4-1, middle PTFE V-type filler 12-4-1, lower PTFE V-type filler 12-4-1 again.PTFE V-type filler group 12-4 matches with upper Packing seat 12-3.
Spacer ring 12-5 described above be positioned at PTFE V-type filler group 12-4 above, contact with the boss of valve gap Stuffing box 7-1, have positioning action.
Graphite packing 12-6 described above be placed in spacer ring 12-5 above, and by filler pressing sleeve 13, hold-down grid 14 by fastening screw trip bolt 15 pretensions, it has fire-proof function.
All in valve gap Stuffing box 7-1, the upper end of valve gap Stuffing box 7-1 can directly be connected with actuator, compact structure for stem packing 12 described above, filler pressing sleeve 13, hold-down grid 14 and fastening screw trip bolt 15.
To sum up, the utility model adopts integral valve body, the sealing that spring 12-2 by having automatic adjusting decrement between valve rod and Gland and PTFE V-type filler group realize ultra-low temperature ball valve adopts graphite packing to realize fire-proof function on the top of Stuffing box.Body strength is high, and valve stem seal is reliable, compact structure, and long service life, and have fire-proof function.
Claims (7)
1. ultra-low temperature ball valve, comprise valve body, valve component, bearing, valve ball, thrust washer, spirotallic gasket, valve gap Stuffing box, nut, double-screw bolt, valve rod, draining board, stem packing, filler pressing sleeve, hold-down grid and fastening screw trip bolt, it is characterized in that: described valve body is the integral type valve body, valve gap on valve body is for lengthening the valve gap of neck, the valve gap Stuffing box is arranged on the top of valve gap, and the stem packing in it is by hold-down grid, filler pressing sleeve and fastening screw trip bolt locking; Valve gap adopts spirotallic gasket to be connected with nut by double-screw bolt with valve body; Described valve gap is provided with draining board, and draining board and valve gap are by being welded to connect.
2. ultra-low temperature ball valve according to claim 1, it is characterized in that: described valve body is the integral type valve body, the top of valve body is provided with for the opening that valve ball, valve component are installed.
3. ultra-low temperature ball valve according to claim 1, it is characterized in that: described stem packing is followed successively by packing ring, spring, upper Packing seat, PTFE V-type filler group, spacer ring and graphite packing from the bottom up, and by fastening screw trip bolt, hold-down grid and filler pressing sleeve is connected with the valve gap Stuffing box.
4. ultra-low temperature ball valve according to claim 3 is characterized in that: described spring lower end is provided with packing ring.
5. ultra-low temperature ball valve according to claim 3, it is characterized in that: the lower end of described PTFE V-type filler group is loaded by spring, be comprised of upper, middle and lower PTFE V-type filler successively, its material is PTFE, and the angle of V-type filler is arbitrarily angled between 90 degree are spent with 180.
6. ultra-low temperature ball valve according to claim 3, it is characterized in that: described spacer ring contacts with the boss of valve gap Stuffing box, and spacing by its boss.
7. ultra-low temperature ball valve according to claim 3, it is characterized in that: described stem packing, hold-down grid, filler pressing sleeve and lock screw are all in the valve gap Stuffing box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220513078 CN202992241U (en) | 2012-10-09 | 2012-10-09 | Ultra-low temperature ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220513078 CN202992241U (en) | 2012-10-09 | 2012-10-09 | Ultra-low temperature ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202992241U true CN202992241U (en) | 2013-06-12 |
Family
ID=48563422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220513078 Expired - Lifetime CN202992241U (en) | 2012-10-09 | 2012-10-09 | Ultra-low temperature ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202992241U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865384A (en) * | 2012-10-09 | 2013-01-09 | 镇江市铸造阀门厂有限公司 | Ultralow-temperature globe valve |
| CN104154265A (en) * | 2014-07-30 | 2014-11-19 | 保一集团有限公司 | Mixed-sealing type top-mounted low-temperature ball valve |
| CN104565422A (en) * | 2013-10-29 | 2015-04-29 | 上海上冶阀门制造有限公司 | Integrated unloading type low-temperature ball valve |
| CN105003678A (en) * | 2015-06-10 | 2015-10-28 | 合肥通用机械研究院 | Self-compensating low-temperature ball valve |
-
2012
- 2012-10-09 CN CN 201220513078 patent/CN202992241U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865384A (en) * | 2012-10-09 | 2013-01-09 | 镇江市铸造阀门厂有限公司 | Ultralow-temperature globe valve |
| CN104565422A (en) * | 2013-10-29 | 2015-04-29 | 上海上冶阀门制造有限公司 | Integrated unloading type low-temperature ball valve |
| CN104154265A (en) * | 2014-07-30 | 2014-11-19 | 保一集团有限公司 | Mixed-sealing type top-mounted low-temperature ball valve |
| CN105003678A (en) * | 2015-06-10 | 2015-10-28 | 合肥通用机械研究院 | Self-compensating low-temperature ball valve |
| CN105003678B (en) * | 2015-06-10 | 2017-09-26 | 合肥通用机械研究院 | Self-compensating low-temperature ball valve |
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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 |
Owner name: JIANGSU YIFA GROUP CO., LTD. Free format text: FORMER NAME: ZHENJIANG CASTING VALVE PLANT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 212221 Jiangsu Province, Yangzhong City West to Town North Road No. 34 Patentee after: JIANGSU EVALVE GROUP Co.,Ltd. Address before: 212221 Jiangsu Province, Yangzhong City West to Town North Road No. 34 Patentee before: ZHENJIANG CASTING VALVE FACTORY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 212221 Jiangsu Province, Yangzhong City West to Town North Road No. 16 Patentee after: JIANGSU EVALVE CO.,LTD. Address before: 212221 Jiangsu Province, Yangzhong City West to Town North Road No. 34 Patentee before: JIANGSU EVALVE GROUP Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |