CN216666557U - Soft-hard combined sealed ultralow temperature ball valve - Google Patents
Soft-hard combined sealed ultralow temperature ball valve Download PDFInfo
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- CN216666557U CN216666557U CN202123090875.XU CN202123090875U CN216666557U CN 216666557 U CN216666557 U CN 216666557U CN 202123090875 U CN202123090875 U CN 202123090875U CN 216666557 U CN216666557 U CN 216666557U
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Abstract
The utility model relates to a soft-hard combined sealing type ultralow temperature ball valve which comprises a valve body, a valve rod and a support, wherein a combined ball body is arranged in the valve body, a lengthened valve cover is arranged on the valve body, and the support is connected with the top end of the lengthened valve cover; the sealing device also comprises a gland, a sealing body, sealing filler and a tapered wedge sealing ring; the gland is positioned on the inner side of the support and is detachably connected with the top end of the lengthened valve cover, and the sealing body is embedded in the inner hole wall of the gland and is in sealing contact with the valve rod; the top end of the lengthened valve cover is provided with an expanding groove, the tapered wedge sealing ring is positioned in the expanding groove, the sealing packing is positioned between the gland and the tapered wedge sealing ring, and an ejector rod is arranged in the sealing packing. The utility model adopts a sealing combination mode of combining soft sealing with hard sealing, can be applied to high-pressure environment, simultaneously overcomes the sealing failure phenomenon caused by large shrinkage rate difference between sealing materials and a valve rod and a valve seat, avoids leakage and ensures reliable sealing.
Description
Technical Field
The utility model relates to a ball valve structure, in particular to a soft and hard combined sealing type ultralow temperature ball valve.
Background
The ball valve, the spheroid is driven by the valve rod, and the valve of doing the rotary motion around the ball valve axis. The hard seal V-shaped ball valve can also be used for regulating and controlling fluid, wherein a V-shaped ball core of the hard seal V-shaped ball valve and a metal valve seat of the build-up welding hard alloy have strong shearing force, and the hard seal V-shaped ball valve is particularly suitable for media containing fibers, tiny solid particles and the like. The multi-way ball valve can flexibly control the confluence, the diversion and the switching of the flow direction of the medium on the pipeline, and can close any channel to connect the other two channels. The valve of this type should be generally installed horizontally in the pipeline. The ball valve is divided into: pneumatic ball valves, electric ball valves, manual ball valves.
Most existing ball valves use a hard seal to seal between the valve stem and the valve body. However, when the ball valve is in the working condition of ultra-low temperature medium pipelines such as liquid oxygen, liquid nitrogen, liquid argon and the like, the difference of the shrinkage rates between the sealing material of the hard seal and the valve rod and the valve seat is large, so that the sealing failure can be caused, and the poor phenomenon of leakage can be further generated.
SUMMERY OF THE UTILITY MODEL
The purpose of the utility model is:
the design is a soft-hard combined sealing type ultralow temperature ball valve, adopts a sealing combination mode of combining soft sealing with hard sealing, can be applied to a high-pressure environment, overcomes the sealing failure phenomenon caused by large shrinkage rate difference between a sealing material and a valve rod and a valve seat, avoids leakage and ensures reliable sealing.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a soft and hard combined sealed ultra-low temperature ball valve comprises a valve body, a valve rod and a support, wherein a combined ball body is arranged in the valve body, a lengthened valve cover is arranged on the valve body, the valve rod is positioned in the lengthened valve cover, the bottom end of the valve rod is connected with the combined ball body, the support is connected with the top end of the lengthened valve cover, and a bevel gear device is arranged at the top end of the support; the sealing device also comprises a gland, a sealing body, sealing filler and a tapered wedge sealing ring; the gland is positioned on the inner side of the support and is detachably connected with the top end of the lengthened valve cover, and the sealing body is embedded in the inner hole wall of the gland and is in sealing contact with the valve rod; the top end of the lengthened valve cover is provided with an expanding groove, the tapered wedge sealing ring is positioned in the expanding groove, the sealing packing is positioned between the gland and the tapered wedge sealing ring, and an ejector rod is arranged in the sealing packing.
Furthermore, the gland is detachably connected with the top end of the lengthened valve cover through a screw, and the sealing body is annular and is sleeved on the periphery of the valve rod; the seal body includes skeleton, main sealing ring, goes up the hoop and encircles the ring and encircle down.
Further, the framework is cylindrical and is positioned in the main sealing ring, the upper clamping ring clamps the upper part of the main sealing ring, and the lower clamping ring clamps the lower part of the main sealing ring.
Furthermore, the main seal ring inboard has set gradually side top tight lip, goes up main seal lip, goes up vice seal lip, lower seal lip and external seal lip from last to down.
Furthermore, the ejector rod is in a round rod shape and is positioned in a hole in the sealing filler, the ejector rod is vertically arranged, the top of the ejector rod is in contact with the bottom end of the gland, and the bottom of the ejector rod tightly pushes the top end face of the tapered wedge sealing ring.
Furthermore, the tapered wedge sealing ring is annular and is sleeved on the periphery of the valve rod, and the tapered wedge sealing ring is in sealing contact with the valve rod.
Furthermore, the periphery of the bottom end of the tapered wedge sealing ring is provided with a tapered wedge surface, and the tapered wedge surface is matched with the inclined plane at the bottom end of the expanded groove.
The utility model has the beneficial effects that: the utility model provides a soft or hard combination sealed ultra-low temperature ball valve, combines gland, seal, ejector pin, sealing filler and slide wedge sealing ring's whole utilization, adopts soft or hard sealed combination mode of sealing, can be applied to the high-pressure pipeline environment, overcomes simultaneously under the ultra-low temperature environment because of the sealed material and the valve rod, the great sealed inefficacy phenomenon that leads to of shrinkage factor difference between the disk seat, thereby soft sealed can form the sealed protection of second grade, avoids the liquid leakage in the pipeline, ensures sealed reliable.
Drawings
Fig. 1 is a sectional view showing the overall structure of a soft and hard combined sealing type ultra-low temperature ball valve according to the present invention.
Fig. 2 is a schematic view of a partial sectional structure of a soft and hard combined sealing type ultra-low temperature ball valve according to the present invention.
Fig. 3 is a schematic sectional view of a sealing body of a soft and hard combined sealing type ultra-low temperature ball valve according to the present invention.
In the figure: 1. a valve body; 2. combining the spheres; 3. a valve stem; 4. lengthening the valve cover; 5. a support; 6. a bevel gear device; 7. a gland; 8. a seal body; 81. a framework; 82. a primary seal ring; 821. a side seal lip; 822. an upper primary seal lip; 823. an upper secondary seal lip; 824. a lower sealing lip; 825. an outer sealing lip; 83. an upper clamping ring; 84. a lower clamping ring; 9. a top rod; 10. sealing and filling; 11. and the tapered wedge sealing ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1 to 3, a hard-soft combined sealed ultra-low temperature ball valve comprises a valve body 1, a valve rod 3 and a support 5, wherein a combined ball 2 is arranged in the valve body 1, a lengthened valve cap 4 is arranged on the valve body 1, the valve rod 3 is arranged in the lengthened valve cap 4, the bottom end of the valve rod is connected with the combined ball 2, the support 5 is connected with the top end of the lengthened valve cap 4, a bevel gear device 6 is arranged at the top end of the support 5, the bevel gear device 6 is used for facilitating manual screwing and controlling, and the bevel gear device 6 can adjust the combined ball 2 through the valve rod 3, so as to open and close the ball valve; the sealing device also comprises a gland 7, a sealing body 8, sealing filler 10 and a tapered wedge sealing ring 11; the gland 7 is positioned on the inner side of the bracket 5 and is detachably connected with the top end of the lengthened valve cover 4, the sealing body 8 is embedded in the inner hole wall of the gland 7 and is in sealing contact with the valve rod 3, and the sealing body 8 is used for forming soft sealing; the top end of the lengthened valve cover 4 is provided with an expanding groove, the tapered wedge sealing ring 11 is positioned in the expanding groove, the sealing filler 10 is positioned between the gland 7 and the tapered wedge sealing ring 11, the ejector rod 9 is arranged in the sealing filler 10, and the ejector rod 9, the sealing filler 10 and the tapered wedge sealing ring 11 are used for forming hard sealing.
The gland 7 is detachably connected with the top end of the lengthened valve cover 4 through a screw, and the sealing body 8 is annular and is sleeved on the periphery of the valve rod 3; the seal body 8 includes a backbone 81, a primary seal ring 82, an upper clamp ring 83 and a lower clamp ring 84, the backbone 81 being configured to maintain the structural strength of the primary seal ring 82, the upper clamp ring 83 and the lower clamp ring 84 being configured to clamp the upper and lower portions of the primary seal ring 82, respectively.
The framework 81 is cylindrical and located in the main sealing ring 82, the upper clamping ring 83 clamps the upper portion of the main sealing ring 82, and the lower clamping ring 84 clamps the lower portion of the main sealing ring 82, so that the main sealing ring 82 is tightly attached to the valve rod 3.
The inner side of the main sealing ring 82 is sequentially provided with a side jacking lip 821, an upper main sealing lip 822, an upper auxiliary sealing lip 823, a lower sealing lip 824 and an outer sealing lip 825 from top to bottom, the side jacking lip 821, the upper main sealing lip 822, the upper auxiliary sealing lip 823, the lower sealing lip 824 and the outer sealing lip 825 are all used for playing a role in sealing, multi-stage sealing is formed, even if sealing of a certain part fails, the sealing effect of other parts is not influenced, and therefore the overall sealing effect is ensured.
The ejector rod 9 is in a round rod shape and is positioned in a hole in the sealing packing 10, the ejector rod 9 is vertically arranged, the top of the ejector rod 9 is in contact with the bottom end of the gland 7, the bottom of the ejector rod 9 tightly pushes the top end face of the tapered wedge sealing ring 11, and the ejector rod 9 is used for applying the locking pressure of the gland 7 to the tapered wedge sealing ring 11.
The tapered wedge sealing ring 11 is annular and is sleeved on the periphery of the valve rod 3, the tapered wedge sealing ring 11 is in sealing contact with the valve rod 3, and the tapered wedge sealing ring 11 is used for forming sealing for the valve rod 3.
The bottom periphery of slide wedge sealing ring 11 is provided with the slide wedge face, the slide wedge face cooperatees with the inclined plane of expanding the groove bottom, under the effect of inclined plane and lower pressure, annular slide wedge sealing ring 11 can contract towards valve rod 3 is inside to in close contact with ensures sealed effect.
The working principle of the utility model is as follows: ultralow temperature media in the pipeline flow along the pipeline and pass through the ball valve, so that the temperature of parts of the ball valve is reduced; the pressure medium is firstly blocked by the sealing structure between the combined sphere 2 and the valve body 1, and if the sealing structure between the combined sphere 2 and the valve body 1 fails due to temperature reduction, the liquid enters the lengthened valve cover 4 upwards along the valve rod 3;
the liquid entering the valve rod 3 and the lengthened valve cover 4 is blocked by a hard seal consisting of an ejector rod 9, a sealing filler 10 and a tapered wedge sealing ring 11; the method comprises the following specific steps: the gland 7 is locked by a screw, pressing force acts on the tapered wedge sealing ring 11 through the ejector rod 9, and the tapered wedge sealing ring 11 retracts towards the valve rod 3 under the action of the tapered wedge sealing ring 11 and the inclined plane of the groove, so that sealing is formed;
the sealing packing 10 also forms a seal, and the sealing packing 10 is tightly supported by the ejector rod 9 to ensure the structural strength;
if the hard seal fails due to a large difference in shrinkage, the liquid will be blocked by the soft seal formed by the seal body 8; the method specifically comprises the following steps: the framework 81 is used as an inner support of the main sealing ring 82, the upper clamping ring 83 is used for clamping the side sealing lip 821, the upper main sealing lip 822 and the upper auxiliary sealing lip 823, the lower clamping ring 84 is used for clamping the lower sealing lip 824 and the outer sealing lip 825, and the outer wall of the valve rod 3 is ensured to be tightly attached, so that a contact deformation type seal is formed, even if the shrinkage rate difference is large, the main sealing ring 82 still can be tightly attached to the valve rod 3, the sealing effect is ensured, and sealing failure is avoided.
The above examples are intended to further illustrate the present invention, but are not intended to limit the utility model to these specific embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be understood to be within the protection scope of the present invention.
Claims (7)
1. A soft and hard combined sealing type ultralow temperature ball valve comprises a valve body (1), a valve rod (3) and a support (5), wherein a combined ball body (2) is arranged in the valve body (1), a lengthened valve cover (4) is arranged on the valve body (1), the valve rod (3) is positioned in the lengthened valve cover (4), the bottom end of the valve rod is connected with the combined ball body (2), the support (5) is connected with the top end of the lengthened valve cover (4), and a bevel gear device (6) is arranged at the top end of the support (5); the method is characterized in that: the sealing device also comprises a gland (7), a sealing body (8), sealing filler (10) and a tapered wedge sealing ring (11); the gland (7) is positioned on the inner side of the support (5) and is detachably connected with the top end of the lengthened valve cover (4), and the sealing body (8) is embedded in the inner hole wall of the gland (7) and is in sealing contact with the valve rod (3); the top end of the lengthened valve cover (4) is provided with an expanding groove, the wedge sealing ring (11) is positioned in the expanding groove, the sealing filler (10) is positioned between the gland (7) and the wedge sealing ring (11), and the ejector rod (9) is arranged in the sealing filler (10).
2. The combined soft and hard sealed ultra-low temperature ball valve according to claim 1, wherein: the gland (7) is detachably connected with the top end of the lengthened valve cover (4) through a screw, and the sealing body (8) is annular and sleeved on the periphery of the valve rod (3); the sealing body (8) comprises a framework (81), a main sealing ring (82), an upper clamping ring (83) and a lower clamping ring (84).
3. The combined soft and hard sealed ultra-low temperature ball valve as claimed in claim 2, wherein: the framework (81) is cylindrical and positioned in the main sealing ring (82), the upper clamping ring (83) clamps the upper part of the main sealing ring (82), and the lower clamping ring (84) clamps the lower part of the main sealing ring (82).
4. A combined hard and soft sealed ultra-low temperature ball valve according to claim 3, wherein: the inner side of the main sealing ring (82) is sequentially provided with a side jacking lip (821), an upper main sealing lip (822), an upper auxiliary sealing lip (823), a lower sealing lip (824) and an outer sealing lip (825) from top to bottom.
5. The combined soft and hard sealed ultra-low temperature ball valve according to claim 4, wherein: the ejector rod (9) is in a round rod shape and is positioned in a hole in the sealing filler (10), the ejector rod (9) is vertically arranged, the top of the ejector rod (9) is in contact with the bottom end of the gland (7), and the bottom of the ejector rod tightly pushes the top end face of the wedge sealing ring (11).
6. The ball valve of claim 5, wherein the ball valve is a combination of a soft and hard type and an ultra-low temperature type: the wedge sealing ring (11) is annular and is sleeved on the periphery of the valve rod (3), and the wedge sealing ring (11) is in sealing contact with the valve rod (3).
7. The combined soft and hard sealed ultra-low temperature ball valve according to claim 6, wherein: and the periphery of the bottom end of the tapered wedge sealing ring (11) is provided with a tapered wedge surface, and the tapered wedge surface is matched with the inclined plane at the bottom end of the expanded groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123090875.XU CN216666557U (en) | 2021-12-10 | 2021-12-10 | Soft-hard combined sealed ultralow temperature ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123090875.XU CN216666557U (en) | 2021-12-10 | 2021-12-10 | Soft-hard combined sealed ultralow temperature ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216666557U true CN216666557U (en) | 2022-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123090875.XU Active CN216666557U (en) | 2021-12-10 | 2021-12-10 | Soft-hard combined sealed ultralow temperature ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216666557U (en) |
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2021
- 2021-12-10 CN CN202123090875.XU patent/CN216666557U/en active Active
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