CN222416324U - A redundant and successive valve stem sealing device for underwater valves - Google Patents
A redundant and successive valve stem sealing device for underwater valves Download PDFInfo
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- CN222416324U CN222416324U CN202421087310.7U CN202421087310U CN222416324U CN 222416324 U CN222416324 U CN 222416324U CN 202421087310 U CN202421087310 U CN 202421087310U CN 222416324 U CN222416324 U CN 222416324U
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Abstract
The utility model discloses a redundant gradual-replacement valve rod sealing device of an underwater valve, which belongs to the technical field of underwater valve sealing and comprises a valve cover, a valve rod and a sealing assembly matched with the valve rod, wherein the sealing assembly comprises a first packing box and a packing gland I matched with the first packing box, a first V-shaped sealing gasket, a second V-shaped sealing gasket and a third V-shaped sealing gasket are stacked in the first packing box from top to bottom, a conical pressing ring with a conical section is arranged below the third V-shaped sealing gasket, the top of the conical pressing ring is in contact fit with the bottom of the third V-shaped sealing gasket, at least two outer annular protrusions and two inner annular protrusions are arranged on two sides of the first V-shaped sealing gasket, the outer annular protrusions are in contact with the inner side of the first packing box, and the inner annular protrusions are in contact with the valve rod. The utility model adopts multiple redundant sealing design, and the residual sealing device still has sealing effect when one sealing device is damaged, thereby enhancing the sealing performance of the device and prolonging the service life of the device.
Description
Technical Field
The utility model relates to the technical field of underwater valve sealing, in particular to a redundant alternate valve rod sealing device of an underwater valve.
Background
The valve is a control component in the fluid conveying system and has the functions of stopping, adjusting, guiding, preventing backflow, stabilizing pressure, diverting or overflow pressure relief and the like. In the existing sealing device between the valve cover and the valve rod, a sealing structure form for placing a double O-shaped sealing ring is generally adopted to achieve the sealing of a stuffing box on the valve.
The O-shaped sealing ring is easy to damage in the assembly of the O-shaped sealing ring and the opening and closing processes of the valve, the O-shaped sealing ring cannot achieve the sealing effect after being damaged, and medium leakage is caused, so that economic loss is caused, and the environment is polluted.
Disclosure of utility model
Aiming at the defects existing in the prior art, the utility model aims to provide a redundant alternative valve rod sealing device of an underwater valve, so as to solve the problems that a sealing ring of the current sealing device is easy to damage and causes medium leakage.
The redundant alternate valve rod sealing device for the underwater valve is characterized by comprising a valve cover, a valve rod and a sealing assembly matched with the valve rod, wherein the sealing assembly comprises a first packing box and a first packing gland matched with the first packing box, a first V-shaped sealing gasket, a second V-shaped sealing gasket and a third V-shaped sealing gasket are stacked in the first packing box from top to bottom, a conical pressing ring with a conical section is arranged below the third V-shaped sealing gasket, the top of the conical pressing ring is in contact fit with the bottom of the third V-shaped sealing gasket, at least two outer annular protrusions and two inner annular protrusions are arranged on two sides of the first V-shaped sealing gasket, the outer annular protrusions are in contact with the inner side of the first packing box, and the inner annular protrusions are in contact with the valve rod.
The technical scheme provided by the embodiment of the application at least has the following technical effects:
The utility model has a plurality of sealing structures, and when one sealing structure is damaged or aged to cause the failure of the sealing ring, other sealing structures can still achieve good sealing effect, thereby prolonging the service life of the equipment and realizing durability.
In some embodiments, the first V-shaped gasket has a first annular protrusion on an upper portion thereof, and the second V-shaped gasket has a first annular groove on a lower portion thereof that mates with the first annular protrusion.
In some embodiments, at least three second V-shaped gaskets are arranged between the first V-shaped gasket and the third V-shaped gasket, and a second annular protrusion is arranged at the upper part of the second V-shaped gasket and is matched with the first annular groove of the second V-shaped gasket at the upper layer of the second annular protrusion.
In some embodiments, a second annular groove is formed at the lower part of the third V-shaped sealing gasket and is matched with a second annular protrusion at the upper part of the second V-shaped sealing gasket below the second annular groove.
In some embodiments, the sealing assembly comprises a second packing box arranged above the first packing box and a second packing box matched with the second packing box, wherein a first support ring with an I-shaped cross section is arranged in the second packing box, one side, close to the valve rod, of the first support ring and one side, far away from the valve rod, of the first support ring are respectively provided with a first annular groove and a second annular groove, and O-shaped sealing rings are respectively arranged in the first annular groove and the second annular groove.
In some embodiments, a second support ring with an I-shaped cross section is arranged in the second stuffing box, an annular groove III and an annular groove IV are respectively arranged on one side, close to the valve rod, and one side, far away from the valve rod, of the second support ring, and lip-shaped sealing rings are respectively arranged in the annular groove III and the annular groove IV.
In some embodiments, the lip-shaped sealing ring is internally wrapped with a second annular sealing ring with an elliptic section, the lower end of the second annular sealing ring is provided with an annular base with an inverted T-shaped section, and the annular base abuts against the second annular sealing ring.
In some embodiments, a first threaded hole is formed in the first packing gland, the first packing gland is fixedly connected with the second support ring through a bolt, and a second threaded hole is formed in the first support ring, and the second packing gland is fixedly connected with the first support ring through a bolt.
In some embodiments, at least two belleville springs are disposed between the first support ring and the second support ring.
In some embodiments, a plurality of compression elastic pieces are arranged on two sides of the conical compression ring, one end of each elastic piece is fixedly connected with the lower part of the conical compression ring, and the other end of each elastic piece is in butt joint with the inner side of the first V-shaped sealing gasket.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a schematic diagram of a first stuffing box according to an embodiment of the present utility model;
Fig. 4 is a schematic structural diagram of a second stuffing box and a first stuffing gland according to an embodiment of the present utility model.
The valve comprises a valve cover 01, a valve rod 03, a sealing assembly 032, a first packing gland, 031, a second packing gland, 033, a first packing gland, 034, a second packing gland, 0331, a conical compression ring, 0333, a first V-shaped sealing gasket, 0334, a second V-shaped sealing gasket, 0335, a third V-shaped sealing gasket, 0332, an outer annular bulge, 03310, an inner annular bulge, 0338, a first annular bulge, 0337, a first annular groove, 0336, a second annular bulge, 0339, a second annular groove, 03311, a compression elastic piece, 0321, a first threaded hole, 0341, a second threaded hole, 0342, an annular groove I, 0343, an annular groove II, 0344, an annular groove III, a 0345 annular groove IV, 0346, a disk-shaped gasket, 0347, an O-shaped sealing gasket, 0348, a second annular sealing gasket, 0349, a lip sealing ring, 03410, a first support ring, 03411, a second support ring, a 03412 and an annular base.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs, and the terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the application. The terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc
The orientation or positional relationship indicated is based on that shown in the drawings for convenience of description and simplicity of description only, and is not intended to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present application, "and/or" is merely an association relationship describing the association object, and means that three relationships may exist, for example, a and/or B may mean that a exists alone, while a and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should be noted that, in the present application, words such as "in some embodiments," "illustratively," "for example," and the like are used to indicate examples, illustrations, or descriptions. Any embodiment or design described herein as "in some embodiments," "illustratively," "for example," should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "in some embodiments," "illustratively," "for example," and the like is intended to present related concepts in a concrete fashion, meaning that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The valve is a control component in the fluid conveying system and has the functions of stopping, adjusting, guiding, preventing backflow, stabilizing pressure, diverting or overflow pressure relief and the like. In the existing sealing device between the valve cover and the valve rod, a sealing structure form for placing a double O-shaped sealing ring is generally adopted to achieve the sealing of a stuffing box on the valve.
The O-shaped sealing ring is easy to damage in the assembly of the O-shaped sealing ring and the opening and closing processes of the valve, the O-shaped sealing ring cannot achieve the sealing effect after being damaged, and medium leakage is caused, so that economic loss is caused, and the environment is polluted.
Based on this, in order to improve the problem of leakage caused by damage to the sealing device in the related art, the following scheme is provided in the embodiments of the present application.
Example 1
Referring to fig. 1 to 4, the embodiment of the application provides a redundant alternate valve rod sealing device of an underwater valve, which comprises a valve cover 01, a valve rod 02 and a sealing assembly 03 matched with the valve rod 02, wherein the sealing assembly 03 comprises a first packing box 033 and a packing gland 032 matched with the first packing box 033, a first V-shaped sealing gasket 0333, a second V-shaped sealing gasket 0334 and a third V-shaped sealing gasket 0335 are stacked from top to bottom in the first packing box 033, a conical pressing ring 0331 with a conical section is arranged below the third V-shaped sealing gasket, the top of the conical pressing ring 0331 is in contact fit with the bottom of the third V-shaped sealing gasket 0335, and the sealing performance and stability of the first V-shaped sealing gasket 0333 are enhanced while the first packing box 033 is stabilized.
At least two outer annular protrusions 0332 and two inner annular protrusions 03310 are arranged on two sides of the first V-shaped sealing gasket 0333, the outer annular protrusions 0332 are in contact with the inner side of the first stuffing box 033, and the inner annular protrusions 03310 are in contact with the valve rod 02. The conical compression ring 0331 applies pressure to the first V-shaped sealing gasket 0333 towards two sides, so that the outer annular protrusions 0332 and the inner annular protrusions 03310 on two sides of the first V-shaped sealing gasket 0333 deform to be in close contact with the valve rod 02 and the inner side of the first packing box 033, and sealing performance is enhanced.
The upper part of the first V-shaped sealing pad 0333 is provided with a first annular bulge 0338, and the lower part of the second V-shaped sealing pad 0334 is provided with a first annular groove 0337 matched with the first annular bulge 0338.
At least three second V-shaped sealing gaskets 0334 are arranged between the first V-shaped sealing gasket 0333 and the third V-shaped sealing gasket 0335, and a second annular bulge 0336 is arranged on the upper part of the second V-shaped sealing gasket 0334 and is matched with the first annular groove 0337 of the second V-shaped sealing gasket 0334 on the upper layer.
The lower part of the third V-shaped sealing pad 0335 is provided with a second annular groove 0339 which is matched with a second annular bulge 0336 on the upper part of the second V-shaped sealing pad 0334 below the second annular groove.
The sealing gasket forms a stable multilayer structure, extrusion dislocation is not easy to occur due to overlarge pressure, and the sealing stability of the first stuffing box 033 is enhanced.
The sealing assembly 03 comprises a second packing box 034 arranged above the first packing box 032 and a second packing box 031 matched with the second packing box 034, wherein a first support ring 03410 with an I-shaped cross section is arranged in the second packing box 034, an annular groove I0342 and an annular groove II 0343 are respectively arranged on one side of the first support ring 03410 close to the valve rod 02 and one side of the first support ring away from the valve rod 02, O-shaped sealing rings 0347 are respectively arranged in the annular groove I0342 and the annular groove II 0343, sealing performance is enhanced through an inner-outer double-layer sealing structure, and the O-shaped sealing rings 0347 are made of wear-resistant fluororubber materials.
The second stuffing box 034 is internally provided with a second supporting ring 03411 with an I-shaped section, the side, close to the valve rod 02, of the second supporting ring 03411 and the side, far away from the valve rod 02, of the second supporting ring are respectively provided with an annular groove III 0344 and an annular groove IV 0345, lip-shaped sealing rings 0349 are respectively arranged in the annular groove III 0344 and the annular groove IV 0345, and the sealing performance is enhanced through an inner-outer double-layer sealing structure. The lip seal 0349 is made of Elgiloy and PTFE, elgiloy corrosion-resistant hairspring alloy, PTFE and polytetrafluoroethylene, has the characteristics of high strength, high toughness and corrosion resistance, and can be suitable for the high-pressure low-temperature environment in deep sea.
The inner side of the lip-shaped sealing ring 0349 is wrapped with a second annular sealing ring 0348 with an elliptic section, an annular base 03412 with an inverted T-shaped section is arranged at the lower end of the second annular sealing ring 0348, the annular base 03412 is abutted against the second annular sealing ring 0348, the second annular sealing ring 0348 is deformed while being abutted against, and pressure is applied to the lip-shaped sealing ring 0349 upwards and to the two sides, so that the sealing performance of the lip-shaped sealing ring is enhanced.
The first packing gland 032 is provided with a first threaded hole 0321, the first packing gland 032 is fixedly connected with the second support ring 03411 through bolts, the first support ring 03410 is provided with a second threaded hole 0341, the second packing gland 031 is fixedly connected with the first support ring 03410 through bolts, and the stable connection is ensured, and meanwhile, the disassembly and the installation are convenient.
The utility model adopts a redundant alternative sealing design, and can achieve good sealing effect when one sealing structure is damaged or aged to cause the sealing ring to fail while providing reliable sealing performance, thereby prolonging the service life of the equipment and realizing durability.
Example 2
Embodiment 2 further provides that at least two belleville springs 0346 are disposed between the first support ring 03410 and the second support ring 03411 on the basis of embodiment 1. The sealing device has the advantages that certain elastic potential energy is accumulated while certain sealing performance is achieved, the problem that packing pressing force is insufficient under a high-pressure working condition can be effectively solved, pretightening force compensation is provided for the first packing box 033 and the second packing box 034 when a fixed structure is loose, and therefore the service life of the sealing device is prolonged.
Example 3
Embodiment 3 is further provided, based on embodiment 1, that a plurality of pressurizing elastic members 03311 are arranged on two sides of the conical compression ring 0331, one end of each elastic member is fixedly connected with the lower portion of the conical compression ring 0331, the other end of each elastic member is in butt joint with the inner side of the first V-shaped sealing gasket 0333, the pressurizing elastic members 03311 compress the two sides of the first V-shaped sealing gasket 0333 to apply additional pressure, and the deformation degree of the outer annular protrusion 0332 and the inner annular protrusion 03310 is increased, so that the sealing effect is improved.
The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (10)
1. The redundant gradual-replacement valve rod sealing device of the underwater valve comprises a valve cover (01), a valve rod (02) and a sealing assembly (03) matched with the valve rod (02), and is characterized in that the sealing assembly (03) comprises a first packing box (033) and a first packing gland (032) matched with the first packing box (033), a first V-shaped sealing gasket (0333), a second V-shaped sealing gasket (0334) and a third V-shaped sealing gasket (0335) are stacked from top to bottom in the first packing box (033), a conical pressing ring (0331) with a conical section is arranged below the third V-shaped sealing gasket, the top of the conical pressing ring (0331) is in contact fit with the bottom of the third V-shaped sealing gasket (0335), at least two outer annular protrusions (0332) and two inner annular protrusions (03310) are arranged on two sides of the first V-shaped sealing gasket (0333), the outer annular protrusions (0332) are in contact with the inner sides of the first packing box (033), and the annular protrusions (0302) are in contact with the valve rod.
2. The sealing device according to claim 1, wherein a first annular protrusion (0338) is provided on an upper portion of the first V-shaped gasket (0333), and a first annular groove (0337) that mates with the first annular protrusion (0338) is provided on a lower portion of the second V-shaped gasket (0334).
3. The sealing device according to claim 2, wherein at least three second V-shaped gaskets (0334) are arranged between the first V-shaped gasket (0333) and the third V-shaped gasket (0335), a second annular protrusion (0336) is arranged at the upper part of the second V-shaped gasket (0334), and the second annular protrusion (0336) is matched with the first annular groove (0337) of the second V-shaped gasket (0334) above the second annular protrusion.
4. A sealing arrangement according to claim 3, wherein the lower part of the third V-shaped gasket (0335) is provided with a second annular groove (0339) which cooperates with a second annular protrusion (0336) of the upper part of the second V-shaped gasket (0334) therebelow.
5. The sealing device according to claim 1, wherein the sealing assembly (03) comprises a second stuffing box (034) arranged above the first stuffing box (032) and a second stuffing box (031) matched with the second stuffing box (034), a first support ring (03410) with an I-shaped cross section is arranged in the second stuffing box (034), an annular groove I (0342) and an annular groove II (0343) are respectively arranged on one side, close to the valve rod (02), of the first support ring (03410) and one side, far away from the valve rod (02), of the first support ring, and O-shaped sealing rings (0347) are respectively arranged in the annular groove I (0342) and the annular groove II (0343).
6. The sealing device according to claim 5, wherein a second support ring (03411) with an I-shaped cross section is arranged in the second stuffing box (034), an annular groove III (0344) and an annular groove IV (0345) are respectively arranged on one side, close to the valve rod (02) and one side, far away from the valve rod (02), of the second support ring (03411), and lip-shaped sealing rings (0349) are respectively arranged on the annular groove III (0344) and the annular groove IV (0345).
7. The sealing device of claim 6, wherein a second annular sealing ring (0348) with an oval cross section is wrapped inside the lip sealing ring (0349), an annular base (03412) with an inverted T-shaped cross section is arranged at the lower end of the second annular sealing ring (0348), and the annular base (03412) abuts against the second annular sealing ring (0348).
8. The sealing device according to claim 6, wherein a first threaded hole (0321) is formed in the first packing gland (032), the first packing gland (032) is fixedly connected with the second support ring (03411) through bolts, and a second threaded hole (0341) is formed in the first support ring (03410), and the second packing gland (031) is fixedly connected with the first support ring (03410) through bolts.
9. The sealing device according to claim 6, characterized in that at least two belleville springs (0346) are arranged between the first support ring (03410) and the second support ring (03411).
10. The sealing device according to claim 1, wherein a plurality of pressing elastic members (03311) are arranged on two sides of the conical pressing ring (0331), one end of each pressing elastic member is fixedly connected with the lower portion of the conical pressing ring (0331), and the other end of each pressing elastic member is abutted against the inner side of the first V-shaped sealing gasket (0333).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421087310.7U CN222416324U (en) | 2024-05-17 | 2024-05-17 | A redundant and successive valve stem sealing device for underwater valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421087310.7U CN222416324U (en) | 2024-05-17 | 2024-05-17 | A redundant and successive valve stem sealing device for underwater valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222416324U true CN222416324U (en) | 2025-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421087310.7U Active CN222416324U (en) | 2024-05-17 | 2024-05-17 | A redundant and successive valve stem sealing device for underwater valves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222416324U (en) |
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2024
- 2024-05-17 CN CN202421087310.7U patent/CN222416324U/en active Active
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