CN212509626U - Ultra-low temperature ball valve - Google Patents
Ultra-low temperature ball valve Download PDFInfo
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- CN212509626U CN212509626U CN202021341291.8U CN202021341291U CN212509626U CN 212509626 U CN212509626 U CN 212509626U CN 202021341291 U CN202021341291 U CN 202021341291U CN 212509626 U CN212509626 U CN 212509626U
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- 238000007789 sealing Methods 0.000 claims abstract description 37
- 238000012856 packing Methods 0.000 claims description 37
- 210000004907 gland Anatomy 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 abstract description 11
- 238000013461 design Methods 0.000 abstract description 6
- 239000003949 liquefied natural gas Substances 0.000 description 5
- 239000002861 polymer material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses an ultra-low temperature ball valve, which comprises a valve body and two joints, wherein the axial side walls of the opposite ends of the two joints are provided with external threads, the valve body is provided with internal threads, the opposite ends of the two joints are screwed in from the two ends of an internal thread hole of the valve body, and the valve body and the two joints are connected into an integral structure through the screwing of the internal threads and the external threads; the axial both ends terminal surface of valve body is provided with the seal groove, install the sealing ring in the seal groove, the sealing ring compresses tightly between valve body terminal surface and joint external screw thread tip step face. The utility model discloses improve current ultra-low temperature ball valve structure, adopt threaded connection between design joint and the valve body, can conveniently maintain and dismantle, contact site design metal is sealed to the metal to use the sealing ring to additionally seal, thereby realize that double sealing is in order to stop the leakage problem.
Description
Technical Field
The utility model relates to the technical field of valves, concretely relates to ultra-low temperature ball valve.
Background
The valve suitable for the medium temperature below 150 ℃ is called as an ultralow temperature valve, and comprises an ultralow temperature ball valve, the ultralow temperature ball valve is used in liquefied natural gas, liquefied petroleum gas, chemical engineering, food, air separation devices and other ultralow temperature industries, some ultralow temperature ball valves are still in the development stage at present, the related technology is not mature, the ball valve is easy to leak in the use process, the service life is short, the structure is complex, the reliability is not high, and the like. For example, the liquefied natural gas has very strict requirements on the material and structure of the valve, and the unqualified material and unstable structure can cause the leakage or internal leakage of the shell and the sealing surface, even cause the liquefied natural gas medium leakage to cause explosion.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the ultra-low temperature ball valve is easy to leak in use, and the service life is lower, the utility model provides an ultra-low temperature ball valve which solves the above problems.
The utility model discloses a following technical scheme realizes:
an ultralow temperature ball valve comprises a valve body and two joints, wherein external threads are machined on the axial side walls of opposite ends of the two joints, internal threads are machined on the valve body, the opposite ends of the two joints are screwed in from two ends of an internal thread hole of the valve body, and the valve body and the two joints are connected into an integral structure through screwing of the internal threads and the external threads; the axial both ends terminal surface of valve body is provided with the seal groove, install the sealing ring in the seal groove, the sealing ring compresses tightly between valve body terminal surface and joint external screw thread tip step face.
At present, some ultralow-temperature ball valves are still in the development stage, the related technology is not mature, and the ball valves have the defects of easy leakage, short service life, complex structure, low reliability and the like in the use process. For example, the liquefied natural gas has very strict requirements on the material and structure of the valve, and the unqualified material and unstable structure can cause the leakage or internal leakage of the shell and the sealing surface, even cause the liquefied natural gas medium leakage to cause explosion. Based on this technical background, the utility model discloses improve current ultra-low temperature ball valve structure, adopt threaded connection between design joint and the valve body, can make things convenient for the maintenance to dismantle, contact site design metal is sealed to the metal to use the sealing ring to carry out additionally sealed, thereby realize that double sealing is in order to stop the leakage problem. In addition, the two joints are detachably connected through bolts with the valve body.
Preferably, a mounting groove is formed in the joint, a valve seat is fixed in the mounting groove, and the valve ball is fixed through soft sealing of the valve seat; the mounting groove of the joint is processed with a shape consistent with the excircle of the valve ball; and after the valve seat fails, the shape consistent with the excircle of the valve ball is contacted with the valve ball to realize hard sealing.
The utility model relates to a realize hard sealing and soft sealing dual seal between valve ball and the joint. The groove for installing the valve seat on the joint is provided with a part which is matched with the outer circumference of the valve ball in the circumferential direction, when the valve seat fails due to fire or abrasion, hard sealing can be realized between the joint and the valve ball, and leakage can be reduced to the maximum extent.
Preferably, a valve ball is hermetically arranged in the joint, and a pressure relief hole is further formed in the valve ball; when the valve ball rotates to close the valve, the pressure relief hole is used for communicating the middle cavity of the valve body with the upstream space of the pipeline.
The utility model discloses a be provided with the pressure release hole on the valve ball, when the valve was in closed position, sealed medium at the valve body lumen was because temperature rise reason volume increase, when producing great pressure, accessible pressure release hole was to pipeline upper reaches pressure release to and avoid the valve structure damage that too high pressure leads to.
Further preferably, the other end of the valve body is connected with the lengthened valve cover in a welded mode, and the lengthened valve cover is sleeved outside the valve rod in a clearance fit mode.
The lengthened valve cover is fixedly connected with the valve body in a welding integrated mode, and the sealing performance and the connection rigidity of the joint of the lengthened valve cover and the valve body are guaranteed.
Further preferably, the valve further comprises a valve rod, wherein the valve rod is used for connecting the handle and a valve ball arranged in the joint; the end part, located on the handle, of the valve rod is sleeved with a packing box, a V-shaped packing I, V type packing II, a packing gasket, a belleville spring and a belleville spring gasket are sequentially filled in an annular cavity between the packing box and the valve rod from bottom to top, and the packing box is screwed on the top of the packing box through a packing gland nut and is compressed and fixed.
The utility model discloses a valve rod adopts two V-arrangement to pack and use belleville spring loading to seal in order to realize the dynamic load, can improve sealed and reducing wear, and can compensate wearing and tearing and reduce the effect moment of torsion in the use.
Further preferably, the length of the valve rod is 165 mm.
Through the length of increase valve rod, mainly used extension medium and the distance between the filler play the guard action to the filler.
Further preferably, the valve further comprises a valve rod, wherein the valve rod is used for connecting the handle and a valve ball arranged in the joint; the friction coefficient of the upper bearing of the valve rod and the lower bearing of the valve rod and/or the valve seat is between 0.05 and 0.11.
The upper bearing of the valve rod and the lower bearing of the valve rod are made of ultralow temperature resistant high polymer materials with extremely small friction coefficients, the valve rod is separated from the valve body and the packing box to avoid metal-to-metal friction, the service life of the valve rod is prolonged, the operating torque is reduced, and meanwhile, smooth hand feeling is provided; the valve seat is made of ultralow temperature resistant high polymer material with extremely small friction coefficient, so that smaller operation torque and excellent sealing effect can be realized.
Further preferably, the handle has a length of 172 mm.
The lengthened handle is designed to be positioned at the higher position of the valve, so that the medium is far away, the operation torque is reduced, and cold burn during operation is avoided.
The utility model discloses have following advantage and beneficial effect:
1. the utility model improves the existing ultralow temperature ball valve structure, adopts threaded connection between the design joint and the valve body, can be conveniently maintained and disassembled, designs metal to seal metal at the contact part, and uses the sealing ring to perform additional sealing, thereby realizing double sealing to avoid leakage;
2. the utility model relates to a realize hard sealing and soft sealing dual seal between valve ball and the joint. The groove for mounting the valve seat on the joint is provided with a part which is matched with the outer circumference of the valve ball in the circumferential direction, when the valve seat fails due to fire or abrasion, hard sealing can be realized between the joint and the valve ball, and leakage can be reduced to the greatest extent;
3. the pressure relief hole is arranged on the valve ball, when the valve is in a closed position, the medium sealed in the middle cavity of the valve body is increased in volume due to temperature rise, and when larger pressure is generated, the pressure can be relieved to the upstream of the pipeline through the pressure relief hole, so that the damage of the valve structure caused by overhigh pressure is avoided;
4. the utility model discloses a valve rod adopts two V-arrangement to pack and use belleville spring loading to seal in order to realize the dynamic load, can improve sealed and reducing wear, and can compensate wearing and tearing and reduce the effect moment of torsion in the use.
5. The utility model is beneficial to reducing the operation torque, the upper bearing of the valve rod and the lower bearing of the valve rod adopt ultra-low temperature resistant high polymer materials with extremely small friction coefficients, the valve rod is separated from the valve body and the packing box to avoid the metal to metal friction, the service life of the valve rod is prolonged, and smooth hand feeling is provided while the operation torque is reduced; the valve seat is made of ultralow temperature resistant high polymer material with extremely small friction coefficient, so that smaller operation torque and excellent sealing effect can be realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is the utility model discloses an ultra-low temperature ball valve structure schematic diagram.
Reference numbers and corresponding part names in the drawings: 1-sealing ring, 2-lengthened valve cover, 3-water dropping plate, 4-valve rod, 5-valve rod upper bearing, 6-packing box, 7-packing II, 8-label, 9-handle, 10-limit bolt, 11-packing gland nut, 12-belleville spring gasket, 13-belleville spring, 14-packing gasket, 15-packing I, 16-valve rod lower bearing, 17-valve seat, 18-valve ball, 19-valve body and 20-joint.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
The embodiment provides an ultralow temperature ball valve, which comprises a connector 20, a valve seat 17, a valve ball 18, a valve rod 4, an elongated valve cover 2 and a handle 9; the joint 20 is an intermediate device for connecting the valve body 19 and the pipe, the valve body 19 is for pressing and connecting the parts, and the ball 18 is a device for opening or closing the flow passage.
The valve seat 17 is installed in the joint 20, the valve ball 18 is fixed in a sealing mode through the valve seat 17, the lengthened valve cover 2 is connected with the valve body 19, the two axial ends of the valve rod 4 are connected to the handle 9 and the valve ball 18, the handle 9 can rotate, the limiting bolt 10 is used for limiting, and therefore the ball valve is opened and closed.
The valve body 19 is connected with the two connectors 20 into an integral structure through screwing of the internal thread and the external thread, wherein the two connectors 20 are provided with external threads on the axial side walls of the opposite ends of the two connectors 20, the valve body 19 is provided with internal threads, the opposite ends of the two connectors 20 are screwed in from the two ends of the internal thread hole of the valve body 19; the axial both ends terminal surface of valve body 19 is provided with the seal groove, install sealing ring 1 in the seal groove, sealing ring 1 compresses tightly between valve body 19 terminal surface and the 20 external screw thread tip step faces of joint.
Example 2
The improvement is further improved on the basis of the embodiment 1, a mounting groove is arranged in the connector 20, a valve seat 17 is fixed in the mounting groove, and the valve ball 18 is fixed through the valve seat 17 in a soft sealing manner; the mounting groove of the adapter 20 is shaped to conform to the outer circumference of the valve ball so that it can contact the valve ball to provide a hard seal in the event of failure of the valve seat 17.
The valve ball 18 is also provided with a pressure relief hole; the relief hole is used to communicate the chamber in the valve body 19 with the space upstream of the conduit when the ball 18 is rotated to the valve closed position. The other end of the valve body 19 is welded with the lengthened valve cover 2, and the lengthened valve cover 2 is sleeved outside the valve rod 4 in a clearance fit manner.
The end part of the valve rod 4, which is positioned on the handle 9, is sleeved with a packing box 6, a V-shaped packing I15, a V-shaped packing II7, a packing gasket 14, a belleville spring 13 and a belleville spring gasket 12 are sequentially filled in an annular cavity between the packing box 6 and the valve rod 4 from bottom to top, and the packing box 6 is screwed on the top of the packing box through a packing gland nut 11 and is pressed and fixed. The packing I15 and the packing 117 are used for sealing the valve rod 4, the packing gasket 14 is used for transmitting the pressing force of the disc spring 13 on the packing, the disc spring 13 generates the pressing force on the packing, the disc spring gasket 12 is a device for supporting the disc spring 13, and the packing pressing nut 11 realizes the pressing or releasing of the packing.
Example 3
The improvement is further improved on the basis of the embodiment 2, and further comprises a valve rod 4, wherein the valve rod 4 is used for connecting a handle 9 and a valve ball 18 arranged in a joint 20; the valve rod upper bearing 5, the valve rod lower bearing 16 and the valve seat 17 are all made of ultralow temperature resistant high polymer materials with extremely small friction coefficients.
The upper bearing 5 of the valve rod is used for separating the valve rod 4 from the stuffing box 6 and avoiding metal-to-metal friction; the stem lower bearing 16 serves to separate the stem 4 from the valve body 19 and avoid metal-to-metal friction.
The handle 9 is 172mm in length, and the lengthened handle 9 is located at the higher position of the valve and far away from the medium, so that the operation torque is reduced, and cold burn during operation is avoided.
In addition, a water dropping plate 3 is welded on the lengthened cover plate 2, and the water dropping plate 3 is used for preventing condensed water generated in the operation of the valve from dropping on the valve body 19 and the heat insulation layer. The handle 9 is covered with a label 8 to indicate the opening and closing direction of the valve.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. An ultralow temperature ball valve comprises a valve body (19) and two joints (20), and is characterized in that external threads are machined on the axial side walls of the opposite ends of the two joints (20), internal threads are machined on the valve body (19), the opposite ends of the two joints (20) are screwed in from the two ends of an internal thread hole of the valve body (19), and the valve body (19) and the two joints (20) are connected into an integral structure through screwing of the internal threads and the external threads; the end faces of the two axial ends of the valve body (19) are provided with sealing grooves, sealing rings (1) are installed in the sealing grooves, and the sealing rings (1) are compressed between the end faces of the valve body (19) and the step faces of the ends of the external threads of the joint (20).
2. An ultra-low temperature ball valve according to claim 1, characterized in that the joint (20) is provided with a mounting groove, the mounting groove is internally fixed with a valve seat (17), and the valve ball (18) is fixed by the valve seat (17) in a soft sealing way; the mounting groove of the joint (20) is processed with a shape consistent with the excircle of the valve ball (18); after the valve seat (17) fails, the shape which is consistent with the excircle of the valve ball (18) is contacted with the valve ball (18) to realize hard sealing.
3. An ultra-low temperature ball valve according to claim 1 or 2, characterized in that the joint (20) is internally provided with a valve ball (18) in a sealing way, and the valve ball (18) is also provided with a pressure relief hole; when the valve ball (18) rotates to a valve closing position, the pressure relief hole is used for communicating the cavity in the valve body (19) with the space upstream of the pipeline.
4. An ultra-low temperature ball valve according to claim 1 or 2, characterized in that the other end of the valve body (19) is welded with the lengthened valve cover (2), and the lengthened valve cover (2) is sleeved outside the valve rod (4) in a clearance fit manner.
5. An ultra-low temperature ball valve according to claim 1 or 2, further comprising a valve stem (4), said valve stem (4) being used to connect a handle (9) and a valve ball (18) disposed within a fitting (20); the end part, located on the handle (9), of the valve rod (4) is sleeved with the packing box (6), a V-shaped packing I (15), a V-shaped packing II (7), a packing gasket (14), a belleville spring (13) and a belleville spring gasket (12) are sequentially filled in an annular cavity between the packing box (6) and the valve rod (4) from bottom to top, and the packing gland nut (11) is screwed on the top of the packing box (6) to be compressed and fixed.
6. An ultra-low temperature ball valve according to claim 5, wherein the length of the valve stem (4) is 165 mm.
7. An ultra-low temperature ball valve according to claim 1, further comprising a valve stem (4), said valve stem (4) being adapted to connect a handle (9) to a valve ball (18) disposed within a fitting (20); the friction coefficient of the valve rod upper bearing (5) and the valve rod lower bearing (16) and/or the valve seat (17) is between 0.05 and 0.11.
8. An ultra-low temperature ball valve according to claim 7, characterized in that the handle (9) has a length of 172 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021341291.8U CN212509626U (en) | 2020-07-09 | 2020-07-09 | Ultra-low temperature ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021341291.8U CN212509626U (en) | 2020-07-09 | 2020-07-09 | Ultra-low temperature ball valve |
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| Publication Number | Publication Date |
|---|---|
| CN212509626U true CN212509626U (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021341291.8U Active CN212509626U (en) | 2020-07-09 | 2020-07-09 | Ultra-low temperature ball valve |
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| Country | Link |
|---|---|
| CN (1) | CN212509626U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025015306A1 (en) * | 2023-07-12 | 2025-01-16 | A & N Corporation | Heater optimized ball valve |
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2020
- 2020-07-09 CN CN202021341291.8U patent/CN212509626U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025015306A1 (en) * | 2023-07-12 | 2025-01-16 | A & N Corporation | Heater optimized ball valve |
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