CN219639638U - Novel packing assembly for regulating valve - Google Patents
Novel packing assembly for regulating valve Download PDFInfo
- Publication number
- CN219639638U CN219639638U CN202320226218.3U CN202320226218U CN219639638U CN 219639638 U CN219639638 U CN 219639638U CN 202320226218 U CN202320226218 U CN 202320226218U CN 219639638 U CN219639638 U CN 219639638U
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- Prior art keywords
- packing
- shaped
- filler
- valve
- sealing ring
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- 238000012856 packing Methods 0.000 title claims abstract description 166
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 52
- 239000000945 filler Substances 0.000 claims abstract description 35
- 210000004907 gland Anatomy 0.000 claims abstract description 21
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 12
- 239000010439 graphite Substances 0.000 claims abstract description 12
- 239000002131 composite material Substances 0.000 claims abstract description 10
- 230000005489 elastic deformation Effects 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Abstract
The utility model relates to a novel packing component for a regulating valve, and belongs to the technical field of regulating valves. A novel packing assembly for a regulator valve comprising: the packing device comprises a spring, a packing gasket, a composite combined bidirectional V-shaped packing set, a star-shaped sealing ring, a supporting gasket, an O-shaped sealing ring, a graphite guide sleeve, a packing gland, a packing pressing plate, a stud, a nut and a gasket; the composite combined bidirectional V-shaped packing assembly is adopted, so that the self-lubricating performance is good, the wear resistance and the friction coefficient are small, the eccentric load and eccentric movement of the valve rod can be strongly followed, and the sealing performance is strong; the valve has a bidirectional sealing function, and simultaneously solves the problem that air enters the valve body from the filler when positive pressure medium in the valve leaks outside the filler or negative pressure in the valve; the sealing performance of the filler is further enhanced by arranging the O-shaped sealing ring, the graphite guide sleeve and the star-shaped sealing ring; the spring compensation is further arranged, so that continuous sealing force can be generated to compensate the loss of the filler, and the service life of the filler is prolonged.
Description
Technical Field
The utility model relates to a novel packing component for a regulating valve, and belongs to the technical field of regulating valves.
Background
At present, common packing forms of the regulating valve are a graphite ring structure and a unidirectional V-shaped overlapped packing sealing structure, packing is easy to wear when a valve rod moves up and down for a long time, a compensation function is not provided, and after the packing is worn, medium in the valve body leaks outwards and vacuum working condition sealing is not provided. After the packing is worn, the packing can be pressed again by the gland bolts, so that the leakage problem can be solved temporarily, but the friction coefficient at the joint of the valve rod and the packing can be greatly increased, and a higher actuator thrust is required to drive the valve rod to move up and down, so that the valve rod is easy to act unsmoothly, and the shaking phenomenon occurs; if meet vacuum operating mode, its sealed effect is poor, very easily takes place outside air and leaks in the valve body in filler department gap, and sealed effect is poor, and life is short, has great potential safety hazard.
Therefore, in order to solve the problems of the packing sealing structure, it is important to provide a novel packing assembly structure for the regulating valve.
Disclosure of Invention
Aiming at the technical problems, the utility model aims to provide a novel packing assembly for a regulating valve, which adopts a packing sealing structure combining various sealing modes, namely a composite combined bidirectional V-shaped packing combination is adopted, an O-shaped sealing ring, a graphite guide sleeve and a star-shaped sealing ring are arranged at the same time to further enhance the sealing performance of a packing position, and a spring is also arranged for compensation, so that continuous sealing force is generated to compensate the packing loss, the service life of the packing is prolonged, and the sealing effect is better; meanwhile, the problem that air enters the valve body from the filling cavity of the valve body when positive pressure medium in the valve leaks outside the filling position or negative pressure in the valve is solved.
The following presents a simplified summary of the utility model in order to provide a basic understanding of some aspects of the utility model. It should be understood that this summary is not an exhaustive overview of the utility model. It is not intended to identify key or critical elements of the novel form of the utility model or to delineate the scope of the utility model.
The technical scheme of the utility model is as follows:
a novel packing assembly for a regulator valve comprising: the packing device comprises a spring, a packing gasket, a composite combined bidirectional V-shaped packing set, a star-shaped sealing ring, a supporting gasket, an O-shaped sealing ring, a graphite guide sleeve, a packing gland, a packing pressing plate, a stud, a nut and a gasket. The spring is arranged at the bottom of the packing cavity, and the packing gasket, the composite combined bidirectional V-shaped packing group, the packing gasket and the packing gland are sequentially arranged from bottom to top, the packing pressing plate is arranged on the packing gland, the stud penetrates through the packing pressing plate to be screwed into the valve cover, and the nut and the gasket matched with the stud are screwed to press the packing assembly to realize sealing of the packing part.
Further: the composite combined bidirectional V-shaped packing group comprises a reverse V-shaped packing group and a forward V-shaped packing group.
Further: each V-shaped filler group comprises an upper filler, five same-direction same-specification V-shaped fillers and a lower filler, wherein the five same-direction same-specification V-shaped fillers are combined together in a superposition mode; and then the V-shaped packing group is classified into a forward V-shaped packing group and a reverse V-shaped packing group by changing the orientation of the V-shaped packing group. The included angles of the V-shaped fillers are all 80 degrees.
Further: the O-shaped sealing ring is arranged in an annular groove on the outer surface of the packing gland, and the graphite guide sleeve is arranged in an annular groove on the inner wall of the packing gland.
Further: the support pad is arranged on the star-shaped sealing ring, and the star-shaped sealing ring and the support pad are arranged in an annular groove formed by the packing gland, the valve rod and the packing gasket in a surrounding mode.
The beneficial effects of the utility model are as follows: the composite combined bidirectional V-shaped packing assembly is adopted, so that the self-lubricating performance is good, the wear resistance and the friction coefficient are small, the eccentric load and eccentric movement of the valve rod can be strongly followed, and the sealing performance is strong; the valve has a bidirectional sealing function, and simultaneously solves the problem that air enters the valve body from the filler when positive pressure medium in the valve leaks outside the filler or negative pressure in the valve; the sealing performance of the filler is enhanced by further arranging an O-shaped sealing ring, a graphite guide sleeve and a star-shaped sealing ring; the spring compensation is further arranged, so that continuous sealing force can be generated to compensate the loss of the filler, and the service life of the filler is prolonged.
Drawings
FIG. 1 is a schematic diagram of a novel packing assembly for a regulator valve.
Fig. 2 is an enlarged schematic view of the portion a in fig. 1.
Description of the reference numerals
1-spring, 2-packing pad, 3-convex lower packing, 4-reverse V-shaped packing, 5-reverse concave upper packing, 6-concave lower packing, 7-forward V-shaped packing, 8-reverse convex upper packing, 9-star seal, 10-support pad, 11-O-shaped seal, 12-graphite guide sleeve, 13-packing gland, 14-packing press plate, 15-nut, 16-washer, 17-stud, 18-valve rod, 19-valve cover.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.
The first embodiment is as follows: the present embodiment will be described with reference to fig. 1 and 2, which are a novel packing assembly for a regulating valve, including a spring 1, a packing spacer 2, a male lower packing 3, a reverse V-packing 4, an inverted female upper packing 5, a female lower packing 6, a forward V-packing 7, an inverted male upper packing 8, a star-shaped seal ring 9, a backup pad 10, an O-ring 11, a graphite guide sleeve 12, a packing gland 13, a packing platen 14, a nut 15, a washer 16, a stud 17, a valve stem 18, and a valve cap 19.
The spring 1 is arranged at the bottom of a packing cavity of the valve cover 19, the packing gasket 2, the convex lower packing 3, the reverse V-shaped packing 4, the inverted concave upper packing 5, the concave lower packing 6, the forward V-shaped packing 7, the inverted convex upper packing 8, the packing gasket 2 and the packing gland 13 are sequentially arranged from bottom to top, the packing gland 13 is arranged on the packing gland 14, the stud 17 penetrates through the packing gland 14 to be screwed into the valve cover 19, and the nut 15 and the washer 16 matched with the stud 17 are screwed to compress the whole packing assembly.
As shown in the figure, the positive V-shaped packing group comprises an inverted convex upper packing 5, 5 positive V-shaped packing 7 and a concave lower packing 6 which are overlapped together with the same specification; the reverse V-shaped packing set comprises an inverted concave upper packing 5, 5 reverse V-shaped packing 4 and a convex lower packing 3 which are overlapped together with the same specification. The positive V-shaped packing group is arranged above the reverse V-shaped packing group, and the two V-shaped packing groups are symmetrically arranged to form a composite combined bidirectional V-shaped packing group, so that a bidirectional sealing function is realized, and the problem that air enters the valve body from the packing cavity of the valve cover 19 when positive pressure medium in the valve leaks outside the packing or negative pressure exists in the valve is solved.
The upper end face and the lower end face of the positive V-shaped packing group and the reverse V-shaped packing group are both in a horizontal state, the pressure distribution of the packing pressure surface is uniform, and five V-shaped packing which are in the same direction and the same specification and are overlapped together can play a sealing role at the same time, so that the sealing effect is enhanced; further, the included angle of the positive V-shaped packing 7 is 80 degrees, the concave included angle of the concave lower packing 6 is 90 degrees, the convex included angle of the inverted convex upper packing 8 is 90 degrees, the included angle of the inverted convex upper packing 8 and the concave lower packing 6 is slightly larger than the included angle of the positive V-shaped packing 7, and the positive V-shaped packing 7 is ensured to be stably placed. The reverse V-shaped packing set is the same as the forward V-shaped packing set.
The lip outer diameter of the forward V-shaped packing 7 or the reverse V-shaped packing 4 in a free state is larger than the inner diameter of a packing cavity of the valve cover 19, and the lip inner diameter is smaller than the outer diameter of the valve rod 18. The inclination angles of the inner lip and the outer lip of the forward V-shaped packing 7 or the reverse V-shaped packing 4 are 4 degrees, so that the contact area of the lips is reduced, the friction resistance is reduced, the pre-pressure of the lips on the sealing surface is ensured, even if the compression force is not applied, the lips can seal certain internal pressure, and the packing is combined together in a superposition mode, so that the sealing performance is improved and the service life is prolonged; through adjusting stud 17, apply the compaction force to whole packing subassembly, give positive V type packing group and reverse V type packing group and cause an initial compression volume, make it and sealed face fully contact, guarantee when medium operating pressure risees, make whole compound combination formula two-way V type packing group internal surface and valve rod 18, surface and valve gap 19 packing chamber inner wall homoenergetic closely contact, guarantee sealedly.
After the forward V-shaped packing 7 and the reverse V-shaped packing 4 are used for a period of time, lips are worn, in order to ensure the sealing durability, the pressing force of the lips needs to be adjusted in time, the spring 1 is positioned between the packing pad 2 and the bottom of the packing cavity of the valve cover 19, and the packing loss is compensated by compressing the spring 1 to generate continuous sealing force, so that the sealing performance is exerted for a longer time, and the service life is prolonged.
The graphite guide sleeve 12 is arranged in an annular groove at the upper part of the inner wall of the packing gland 13 and is in contact with the valve rod 18, and the graphite guide sleeve 12 has good self-lubricity, high rebound coefficient and strong wear resistance and can further enhance the sealing performance of the packing.
The support pad 10 is arranged on the star-shaped sealing ring 9, and the support pad 10 and the support pad are installed in an annular groove at the lower part of the inner wall of the packing gland 13 and on the packing pad 2. The star-shaped sealing ring 9 is in contact with the valve rod 18, is a lip sealing piece, and is sealed only by interference deformation of a lip under the condition of low pressure, and the friction force is relatively low due to small contact area; as the pressure increases, the lip elastic deformation increases, the radial pressing force of the star-shaped sealing ring 9 increases, and the contact area with the valve rod 18 increases, thereby ensuring good sealing performance in a high-pressure state.
The O-shaped ring 11 is arranged in an annular groove in the middle of the outer wall of the packing gland 13, so that the tightness between the valve cover 19 and the outer surface of the packing assembly is further improved.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. The novel packing assembly for the regulating valve comprises a spring, a packing gasket, a composite combined type bidirectional V-shaped packing group, a star-shaped sealing ring, a supporting pad, an O-shaped sealing ring, a graphite guide sleeve, a packing gland, a packing pressing plate, a stud, a nut and a gasket.
2. The novel packing assembly for a regulating valve according to claim 1, wherein: the composite combined type bidirectional V-shaped filler group comprises a reverse V-shaped filler group and a forward V-shaped filler group, wherein the forward V-shaped filler group comprises an inverted convex upper filler, 5 forward V-shaped fillers and a concave lower filler which are overlapped together with the same specification; the reverse V-shaped packing set comprises an inverted concave upper packing, 5 reverse V-shaped packing and a convex lower packing which are overlapped together with the same specification, wherein the forward V-shaped packing set is arranged above the reverse V-shaped packing set, and the two V-shaped packing sets are symmetrically arranged.
3. The novel packing assembly for a regulating valve according to claim 2, wherein: the upper end face and the lower end face of the forward V-shaped packing set and the reverse V-shaped packing set are both in a horizontal state, the pressure distribution of the packing pressure surface is uniform, five V-shaped packing which are in the same direction and the same specification and are overlapped together can play a sealing role at the same time, the outer diameter of the lip of the V-shaped packing or the reverse V-shaped packing in a free state is larger than the inner diameter of a packing cavity of a valve cover, and the inner diameter of the lip is smaller than the outer diameter of a valve rod.
4. A novel valve packing assembly according to claim 3, wherein: the included angle of the forward V-shaped filler is 80 degrees, the concave included angle of the concave lower filler is 90 degrees, the convex included angle of the inverted convex upper filler is 90 degrees, the included angle of the inverted convex upper filler and the concave lower filler is slightly larger than the included angle of the forward V-shaped filler, the forward V-shaped filler is ensured to be stably placed, the reverse V-shaped filler group is the same as the forward V-shaped filler group, the inclined angle of the inner lip and the outer lip of the forward V-shaped filler or the reverse V-shaped filler is 4 degrees, and the contact area of the lips of the respective lips is reduced.
5. The novel packing assembly for a regulating valve according to claim 1, wherein: the O-shaped ring is arranged in an annular groove in the middle of the outer wall of the packing gland.
6. The novel packing assembly for a regulating valve according to claim 1, wherein: the graphite guide sleeve is arranged in the annular groove at the upper part of the inner wall of the packing gland and is contacted with the valve rod.
7. The novel packing assembly for a regulating valve according to claim 1, wherein: the star-shaped sealing ring is provided with a supporting pad, the supporting pad and the supporting pad are arranged in an annular groove at the lower part of the inner wall of the packing gland and on the packing pad, and the star-shaped sealing ring is contacted with the valve rod, so that the lip-shaped sealing ring is a lip-shaped sealing piece, and is sealed only by interference deformation of a lip under the condition of low pressure, and the friction force is relatively low due to small contact area; along with the increase of pressure, the elastic deformation of the lip is increased, the radial pressing force of the star-shaped sealing ring is increased, and the contact area with the valve rod is increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320226218.3U CN219639638U (en) | 2023-02-15 | 2023-02-15 | Novel packing assembly for regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320226218.3U CN219639638U (en) | 2023-02-15 | 2023-02-15 | Novel packing assembly for regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219639638U true CN219639638U (en) | 2023-09-05 |
Family
ID=87809557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320226218.3U Active CN219639638U (en) | 2023-02-15 | 2023-02-15 | Novel packing assembly for regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219639638U (en) |
-
2023
- 2023-02-15 CN CN202320226218.3U patent/CN219639638U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |