CN212407761U - Sealing structure for valve shaft - Google Patents
Sealing structure for valve shaft Download PDFInfo
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- CN212407761U CN212407761U CN202020255075.5U CN202020255075U CN212407761U CN 212407761 U CN212407761 U CN 212407761U CN 202020255075 U CN202020255075 U CN 202020255075U CN 212407761 U CN212407761 U CN 212407761U
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- shaft sleeve
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Abstract
The utility model provides a sealing structure for a valve shaft, which comprises a valve body, a valve shaft, a shaft sleeve, an X-shaped sealing element, a first sealing ring, a second sealing ring, a third sealing ring and a bolt, the shaft sleeve is sleeved outside the valve rod shaft, the valve rod shaft and the shaft sleeve are arranged in the valve body, a central shaft hole for the valve rod shaft to penetrate out is formed in the valve body, a first step installation cavity is arranged above the central shaft hole, the shaft sleeve is connected with the valve body through a plurality of bolts, an X-shaped sealing element is arranged between the bottom of the shaft sleeve and the bottom of the first step mounting cavity, a driving part which is in abutting fit with the X-shaped sealing element is arranged at the bottom of the shaft sleeve, the inner wall of the shaft sleeve is provided with a first sealing ring, the outer wall of the shaft sleeve is provided with a second sealing ring, the top of the shaft sleeve is provided with a limiting disc, and a third sealing ring is arranged between the lower wall of the limiting disc and the valve body. The sealing structure can realize multiple sealing, is reliable and durable, and is convenient to install.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a technical field of valve seal, especially a seal structure for valve shaft.
[ background of the invention ]
At present, sealing structures between valve rods and valve bodies of most valves are too complicated, especially, the defects of the traditional packing sealing mode are more, the packing pretightening force is difficult to adjust, the friction force is increased too tightly, the torque is increased, the sealing effect is poor if the friction force is too loose, the sealing compensation is not needed, the sealing structure needs to be adjusted for a period of time generally, and the sealing structure for the valve shaft is provided.
[ Utility model ] content
The utility model aims at solving the problem among the prior art, providing a seal structure for valve shaft, can realize multiple sealed, reliable durable, simple to operate moreover.
In order to achieve the purpose, the utility model provides a seal structure for valve shaft, which comprises a valve body, a valve shaft, a shaft sleeve, an X-shaped sealing element, a first sealing ring, a second sealing ring, a third sealing ring and a bolt, wherein the shaft sleeve is sleeved outside the valve shaft, the valve shaft and the shaft sleeve are installed in the valve body, a central shaft hole for the valve shaft to penetrate out is arranged in the valve body, a first step installation cavity for installing the shaft sleeve is arranged above the central shaft hole, the shaft sleeve is connected with the valve body through a plurality of bolts, the X-shaped sealing element is arranged between the bottom of the shaft sleeve and the bottom of the first step installation cavity, a driving part which is propped against and matched with the X-shaped sealing element is arranged at the bottom of the shaft sleeve, the first sealing ring is installed between the inner wall of the shaft sleeve and the outer wall of the valve shaft, the second sealing ring, the top of the shaft sleeve is provided with a limiting disc, and a third sealing ring is arranged between the lower wall of the limiting disc and the valve body.
As preferred, the axle sleeve includes from last to spacing dish and the installation cover that sets gradually down, the external diameter of spacing dish is greater than the external diameter of installation cover, the lower wall of spacing dish is equipped with to be annular third seal groove with the junction of installation cover, the outer lane of third seal groove is from last to the conical surface that the external diameter is crescent gradually down, the third seal groove leans on the cooperation with the third sealing washer counterbalance, the first seal groove that is used for installing first sealing washer is offered to the inner wall of installation cover, the second seal groove that is used for installing the second sealing washer is offered to the outer wall of installation cover, the equipartition has a plurality of mounting hole on the spacing dish.
Preferably, the bottom of the mounting sleeve is provided with a driving part, the cross section of the driving part is trapezoidal, the outer wall of the driving part is an outer conical surface with the outer diameter gradually decreasing from top to bottom, and the inner wall of the driving part is an inner conical surface with the outer diameter gradually increasing from top to bottom.
Preferably, the cross section of the X-shaped sealing element is X-shaped, the X-shaped sealing element comprises an upper sealing part and a lower sealing part which are symmetrically arranged from top to bottom, two V-shaped sealing skirts are respectively arranged on the upper sealing part and the lower sealing part, the driving part is abutted against the upper sealing part, the two sealing skirts on the outer ring of the X-shaped sealing element are abutted against the first stepped mounting cavity, and the two sealing skirts on the inner ring of the X-shaped sealing element are abutted against the valve rod shaft.
Preferably, a second step installation cavity matched with the limiting disc is arranged above the first step installation cavity, a plurality of threaded holes matched with the bolts are circumferentially formed in the lower wall of the second step installation cavity, the cross sections of the second step installation cavity, the first step installation cavity and the central shaft hole are circular, the outer diameter of the second step installation cavity is larger than that of the first step installation cavity, and the outer diameter of the first step installation cavity is larger than that of the central shaft hole.
Preferably, the top of the bolt is provided with a cylindrical bolt head, and the top of the cylindrical bolt head is provided with an inner hexagonal groove.
The utility model has the advantages that: the utility model discloses a cooperation of valve body, valve rod axle, axle sleeve, X shape sealing member, first sealing washer, second sealing washer, third sealing washer and bolt etc. when the medium in the valve body flows by the clearance of valve rod and axle sleeve, carries out double sealing by four sealed skirts of X shape sealing member earlier, then realizes multiple sealing via first sealing washer, second sealing washer, third sealing washer for sealing performance is reliable, durable. In addition, the shaft sleeve can be controlled to be pressed inwards by screwing the bolt, on one hand, the driving part at the bottom of the shaft sleeve can extrude the sealing skirt edge to enable the sealing skirt edge to be tightly attached to the valve body and the valve rod shaft, and on the other hand, the third sealing ring can be extruded to further improve the sealing effect.
The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.
[ description of the drawings ]
Fig. 1 is a schematic cross-sectional view of a sealing structure for a valve shaft according to the present invention;
fig. 2 is a schematic cross-sectional view of a valve body of a sealing structure for a valve shaft according to the present invention;
fig. 3 is a schematic cross-sectional view of a shaft sleeve of a sealing structure for a valve shaft according to the present invention;
fig. 4 is a schematic cross-sectional view of the X-shaped sealing member of the sealing structure for the valve shaft according to the present invention.
[ detailed description ] embodiments
Referring to fig. 1 to 4, the utility model relates to a sealing structure for valve shaft, which comprises a valve body 1, a valve rod shaft 2, a shaft sleeve 3, an X-shaped sealing element 4, a first sealing ring 5, a second sealing ring 6, a third sealing ring 7 and a bolt 8, wherein the shaft sleeve 3 is sleeved outside the valve rod shaft 2, the valve rod shaft 2 and the shaft sleeve 3 are installed in the valve body 1, a central shaft hole 11 for the valve rod shaft 2 to penetrate out is arranged in the valve body 1, a first step installation cavity 12 for installing the shaft sleeve 3 is arranged above the central shaft hole 11, the shaft sleeve 3 is connected with the valve body 1 through a plurality of bolts 8, the X-shaped sealing element 4 is arranged between the bottom of the shaft sleeve 3 and the bottom of the first step installation cavity 12, the bottom of the shaft sleeve 3 is provided with a driving part 34 which is abutted against the X-shaped sealing element 4 and matched with the X-shaped sealing element 4, the first sealing ring, a second sealing ring 6 is arranged between the outer wall of the shaft sleeve 3 and the first step installation cavity 12, a limiting disc 31 is arranged at the top of the shaft sleeve 3, and a third sealing ring 7 is arranged between the lower wall of the limiting disc 31 and the valve body 1. The axle sleeve 3 includes from last to the spacing dish 31 and the installation cover 32 that set gradually down, the external diameter of spacing dish 31 is greater than the external diameter of installation cover 32, the lower wall of spacing dish 31 is equipped with the junction of installation cover 32 and is annular third seal groove 33, the outer lane of third seal groove 33 is from last to the tapered surface that the external diameter is crescent gradually down, third seal groove 33 offsets with third sealing washer 7 and leans on the cooperation, the first seal groove that is used for installing first sealing washer 5 is offered to the inner wall of installation cover 32, the second seal groove that is used for installing second sealing washer 6 is offered to the outer wall of installation cover 32, the equipartition has a plurality of mounting hole 311 on the spacing dish 31.
Further, the bottom of the mounting sleeve 32 is provided with a driving portion 34, the cross-sectional shape of the driving portion 34 is trapezoidal, the outer wall of the driving portion 34 is an outer tapered surface 341 with an outer diameter gradually decreasing from top to bottom, and the inner wall of the driving portion 34 is an inner tapered surface 342 with an outer diameter gradually increasing from top to bottom. In the process that the shaft sleeve moves downwards, the driving part can be guaranteed to be abutted against the upper part of the X-shaped sealing element, so that the X-shaped sealing element is abutted against the valve body and the valve rod shaft, and the effect of compensating sealing is achieved.
Further, the cross-sectional shape of the X-shaped sealing element 4 is X-shaped, the X-shaped sealing element 4 includes an upper sealing portion 41 and a lower sealing portion 42 which are symmetrically arranged from top to bottom, two V-shaped sealing skirts 40 are respectively arranged on the upper sealing portion 41 and the lower sealing portion 42, the driving portion 34 abuts against the upper sealing portion 41, the two sealing skirts 40 on the outer ring of the X-shaped sealing element 4 abut against the first stepped mounting cavity 12, and the two sealing skirts 40 on the inner ring of the X-shaped sealing element 4 abut against the valve stem shaft 2. The setting of four sealed skirts can reach double seal's effect, the leakproofness that effectual improvement is connected.
Further, the top of first ladder installation cavity 12 is equipped with second ladder installation cavity 13 with spacing dish 31 looks adaptation, screw hole 14 of a plurality of and 8 looks adaptations of bolt is seted up to the lower wall circumference of second ladder installation cavity 13, the cross-sectional shape of second ladder installation cavity 13, first ladder installation cavity 12, central shaft hole 11 is circular, the external diameter of second ladder installation cavity 13 is greater than the external diameter of first ladder installation cavity 12, the external diameter of first ladder installation cavity 12 is greater than the external diameter of central shaft hole 11.
Further, the top of the bolt 8 is provided with a cylindrical bolt head, and the top of the cylindrical bolt head is provided with an inner hexagonal groove.
The utility model discloses the working process:
the utility model relates to a valve is seal structure for axle in the assembling process, inserts valve axle 2 earlier to valve body 1 in, places X shape sealing member 4 in the bottom of first step installation cavity 12, and the below of third seal groove 33 is placed to third sealing washer 7, and first sealing washer 5, second sealing washer 6 are installed respectively on first seal groove, pack into axle sleeve 3 again in valve axle 2 and the valve body 1, can with 8 pretensions of bolt. When the medium in the valve body flows out from the gap between the valve rod and the shaft sleeve, the four sealing skirts 40 of the X-shaped sealing element 4 are used for double sealing, and then multiple sealing is realized through the first sealing ring 5, the second sealing ring 6 and the third sealing ring 7, so that the sealing performance is reliable and durable. In addition, the shaft sleeve 3 can be controlled to be pressed inwards by screwing the bolt 8, on one hand, the driving part at the bottom of the shaft sleeve 3 can extrude the sealing skirt 40 to enable the sealing skirt 40 to be tightly attached to the valve body 1 and the valve rod shaft 2, on the other hand, the third sealing ring 7 can be extruded, and the sealing effect is further improved.
The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.
Claims (6)
1. The utility model provides a valve is seal structure for axle which characterized in that: the valve comprises a valve body (1), a valve rod shaft (2), a shaft sleeve (3), an X-shaped sealing element (4), a first sealing ring (5), a second sealing ring (6), a third sealing ring (7) and a bolt (8), wherein the shaft sleeve (3) is sleeved outside the valve rod shaft (2), the valve rod shaft (2) and the shaft sleeve (3) are installed in the valve body (1), a central shaft hole (11) for the valve rod shaft (2) to penetrate out is formed in the valve body (1), a first step installation cavity (12) for installing the shaft sleeve (3) is arranged above the central shaft hole (11), the shaft sleeve (3) is connected with the valve body (1) through a plurality of bolts (8), the X-shaped sealing element (4) is arranged between the bottom of the shaft sleeve (3) and the bottom of the first step installation cavity (12), and a driving part (34) which is abutted against and matched with the X-shaped sealing element (4) is arranged at the bottom of the shaft sleeve (, a first sealing ring (5) is installed between the inner wall of the shaft sleeve (3) and the outer wall of the valve rod shaft (2), a second sealing ring (6) is installed between the outer wall of the shaft sleeve (3) and the first step installation cavity (12), a limiting disc (31) is arranged at the top of the shaft sleeve (3), and a third sealing ring (7) is installed between the lower wall of the limiting disc (31) and the valve body (1).
2. The seal structure for a valve shaft according to claim 1, wherein: axle sleeve (3) are including spacing dish (31) and installation cover (32) that set gradually from last to down, the external diameter of spacing dish (31) is greater than the external diameter of installation cover (32), the lower wall of spacing dish (31) is equipped with the junction of installation cover (32) and is annular third seal groove (33), the outer lane of third seal groove (33) is from last to the gradually increasing conical surface of external diameter down, third seal groove (33) and third sealing washer (7) counterbalance lean on the cooperation, the first seal groove that is used for installing first sealing washer (5) is offered to the inner wall of installation cover (32), the second seal groove that is used for installing second sealing washer (6) is offered to the outer wall of installation cover (32), the equipartition has a plurality of mounting hole (311) on spacing dish (31).
3. The seal structure for a valve shaft according to claim 2, wherein: the bottom of installation cover (32) is equipped with drive division (34), the cross sectional shape of drive division (34) is trapezoidal, the outer wall of drive division (34) is outer conical surface (341) that external diameter reduces gradually from last to down, and the inner wall of drive division (34) is interior conical surface (342) that the external diameter increases gradually from last to down.
4. The seal structure for a valve shaft according to claim 3, wherein: the cross-sectional shape of X shape sealing member (4) is X shape, X shape sealing member (4) are including last sealing (41) and lower sealing (42) from last to lower symmetry setting, it is two sealing shirt rims (40) that are the V font to have respectively on last sealing (41), lower sealing (42), drive division (34) and last sealing (41) offset lean on, two sealing shirt rims (40) of X shape sealing member (4) outer lane offset lean on with first step installation cavity (12), and two sealing shirt rims (40) of X shape sealing member (4) inner circle offset lean on with valve rod axle (2).
5. The seal structure for a valve shaft according to claim 1, wherein: the top of first step installation cavity (12) is equipped with second step installation cavity (13) with spacing dish (31) looks adaptation, screw hole (14) of a plurality of and bolt (8) looks adaptation are seted up to the lower wall circumference of second step installation cavity (13), the cross-sectional shape of second step installation cavity (13), first step installation cavity (12), central shaft hole (11) is circular, the external diameter of second step installation cavity (13) is greater than the external diameter of first step installation cavity (12), the external diameter of first step installation cavity (12) is greater than the external diameter of central shaft hole (11).
6. The seal structure for a valve shaft according to claim 1, wherein: the top of the bolt (8) is provided with a cylindrical bolt head, and the top of the cylindrical bolt head is provided with an inner hexagonal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020255075.5U CN212407761U (en) | 2020-03-05 | 2020-03-05 | Sealing structure for valve shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020255075.5U CN212407761U (en) | 2020-03-05 | 2020-03-05 | Sealing structure for valve shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212407761U true CN212407761U (en) | 2021-01-26 |
Family
ID=74377644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020255075.5U Active CN212407761U (en) | 2020-03-05 | 2020-03-05 | Sealing structure for valve shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212407761U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901777A (en) * | 2021-02-03 | 2021-06-04 | 湖北航天技术研究院总体设计所 | Special-shaped sealing element and sealing structure |
-
2020
- 2020-03-05 CN CN202020255075.5U patent/CN212407761U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901777A (en) * | 2021-02-03 | 2021-06-04 | 湖北航天技术研究院总体设计所 | Special-shaped sealing element and sealing structure |
| CN112901777B (en) * | 2021-02-03 | 2023-03-28 | 湖北航天技术研究院总体设计所 | Special-shaped sealing element and sealing structure |
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