CN221034278U - Axial pretightening force sealing shaft structure - Google Patents
Axial pretightening force sealing shaft structure Download PDFInfo
- Publication number
- CN221034278U CN221034278U CN202322902937.5U CN202322902937U CN221034278U CN 221034278 U CN221034278 U CN 221034278U CN 202322902937 U CN202322902937 U CN 202322902937U CN 221034278 U CN221034278 U CN 221034278U
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- valve shaft
- sealing
- shaft
- lower valve
- seal
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- 238000007789 sealing Methods 0.000 title claims abstract description 91
- 230000036316 preload Effects 0.000 claims 2
- 238000012856 packing Methods 0.000 abstract description 6
- 210000004907 gland Anatomy 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 238000009434 installation Methods 0.000 description 7
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- Sealing Devices (AREA)
Abstract
The utility model relates to the technical field of sealing shafts, and provides an axial pretightening force sealing shaft structure, which comprises a shaft body and a sealing assembly used for sealing between the shaft body and a shell; the shaft body comprises: the upper valve shaft and the lower valve shaft are detachably arranged on the upper valve shaft; the seal assembly is sleeved on the lower valve shaft and used for sealing between the lower valve shaft and the shell, and when the upper valve shaft is arranged on the lower valve shaft, the upper valve shaft provides axial positioning and jacking force for the seal assembly. Through above-mentioned technical scheme, solved among the prior art and opened and close the moment of torsion big, seal wearing and tearing are fast on the valve shaft, and life is short, need according to the problem of the packing gland of the condition of use, needs continuous adjustment.
Description
Technical Field
The utility model relates to the technical field of sealing shafts, in particular to an axial pretightening force sealing shaft structure.
Background
At present, the floating valve shaft with normal market is an integral valve shaft, and has the characteristics that: 1. the upper part of the valve shaft can be in any form such as a square shaft, a flat shaft and the like according to different driving modes. 2. The sealing mode is that the valve shaft is cut with 0 circle of grooves generally, or the valve shaft is not provided with 0 circle of grooves, the valve body shaft hole adopts the sealing mode of filler, the structure has large opening and closing torque, the sealing abrasion on the valve shaft is quick, the service life is short, and the filler gland needs to be continuously adjusted according to the service condition.
Disclosure of utility model
The utility model provides an axial pretightening force sealing shaft structure, which solves the problems of high opening and closing torque, quick sealing abrasion on a valve shaft, short service life and continuous adjustment of a packing gland according to the use condition in the related art.
The technical scheme of the utility model is as follows:
An axial pretightning force seal shaft structure, includes the axis body, still includes:
the sealing assembly is used for sealing between the shaft body and the shell;
the shaft body comprises:
An upper valve shaft and a lower valve shaft, the lower valve shaft being detachably provided on the upper valve shaft;
The sealing assembly is sleeved on the lower valve shaft and is used for sealing between the lower valve shaft and the shell, and when the upper valve shaft is installed on the lower valve shaft, the upper valve shaft provides axial positioning and jacking force for the sealing assembly.
As a further technical scheme, the method further comprises:
A thread sleeve;
The first inner cavity is arranged on the upper valve shaft;
The first internal thread part is arranged on the inner wall of the first inner cavity;
the second inner cavity is arranged on the lower valve shaft;
The second internal thread part is arranged on the inner wall of the second inner cavity;
And two sides of the thread sleeve are respectively in threaded connection with the first internal thread part and the second internal thread part and are used for connecting the upper valve shaft and the lower valve shaft.
As a further technical scheme, the lower valve shaft outside has annular installation department, seal assembly cover is established on the installation department, seal assembly includes:
The plurality of sealing rings are sleeved on the mounting part in a sliding manner;
the sealing areas are formed between the sealing rings adjacent to the side wall of the mounting part and the mounting part, the sealing areas are formed between the sealing rings close to the upper valve shaft and the upper valve shaft, and the sealing areas are formed between two adjacent sealing rings;
The sealing rings are arranged in a plurality of sleeved mode, and each sealing area is internally provided with one sealing ring for sealing between the shaft body and the shell;
and the sealing gasket is arranged between the upper valve shaft and the lower valve shaft.
As a further technical scheme, still include the tight subassembly that rises, the tight subassembly that rises includes:
A plurality of guide holes, a plurality of which are arranged on the lower valve shaft, the guide holes are arranged along the radial direction, the guide holes are opposite to the sealing ring adjacent to the side wall of the mounting part,
The plurality of tensioning rods are arranged in each guide hole in a sliding sealing manner, one end of each tensioning rod extends out of the lower valve shaft and then abuts against the inner wall of the sealing ring adjacent to the side wall of the mounting part, and the tensioning rods are used for propping up the sealing ring adjacent to the side wall of the mounting part;
An adjustment member, the adjustment member comprising:
The adjusting block is arranged in the second inner cavity in a sliding manner along the axial direction of the lower valve shaft, and the side face of the adjusting block is in contact with one end of all the tensioning rods, so that all the tensioning rods displace in the radial direction of the lower valve shaft and jack the sealing ring.
As a further technical scheme, the method further comprises:
The first clamping groove is of a polygonal structure and is arranged in the first inner cavity;
The second clamping groove is of a polygonal structure and is arranged in the second inner cavity;
the adjusting member further includes:
the adjusting block is of a polygonal structure in plug-in fit with the first clamping groove;
the adjusting rod is arranged at one end of the adjusting rod, the adjusting rod passes through the threaded sleeve,
The clamping block is arranged at the other end of the adjusting rod and is of a polygonal structure in plug-in fit with the second clamping groove;
When one part of the adjusting block is inserted into the first clamping groove, the clamping block pushes the tensioning rod to tightly jack the corresponding sealing ring, and meanwhile the clamping block is inserted into the second clamping groove.
The beneficial effects of the utility model are as follows: in the utility model, the shaft body of the sealing shaft is designed into the upper valve shaft and the lower valve shaft which are detachably arranged, so that the sealing device can be suitable for special sealing rings made of various sanitary materials and has lower torque than the traditional packing sealing group. The service life is longer.
Drawings
The utility model will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of a cross-sectional structure of the utility model;
FIG. 3 is a schematic cross-sectional view of the present utility model (tension rod against corresponding seal ring);
FIG. 4 is a schematic view of the structure of the adjusting member of the present utility model;
In the figure, 1, a shaft body; 2. a seal assembly; 3. an upper valve shaft; 4. a lower valve shaft; 5. a thread sleeve; 6. a first lumen; 7. a first female screw portion; 8. a second lumen; 9. a second internal thread portion; 10. a mounting part; 201. a seal ring; 202. a sealing region; 203. A seal ring; 204. a sealing gasket; 11. a tensioning assembly; 1101. a guide hole; 1102. a tensioning rod; 12. an adjusting member; 1201. an adjusting block; 1202. an adjusting rod; 1203. a clamping block; 13. a first clamping groove; 14. and the second clamping groove.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 to 4, this embodiment provides an axial pretightening force seal shaft structure, including a shaft body 1, and its characterized in that still includes:
A seal assembly 2 for sealing between the shaft body 1 and the housing;
The shaft body 1 includes:
an upper valve shaft 3 and a lower valve shaft 4, the lower valve shaft 4 being detachably provided on the upper valve shaft 3;
The seal assembly 2 is sleeved on the lower valve shaft 4 and is used for sealing between the lower valve shaft 4 and the shell, and when the upper valve shaft 3 is installed on the lower valve shaft 4, the upper valve shaft 3 provides axial positioning and propping force for the seal assembly 2.
In this embodiment, the shaft body 1 after design is two-section valve shaft, and lower valve shaft 4 can dismantle, when the installation, can install seal assembly 2 on lower valve shaft 4 earlier, after the installation, install the lower valve shaft 4 of installing seal assembly 2 on last valve shaft 3 again, at this moment, go up valve shaft 3 and play the tight power of axial positioning jack to seal assembly 2 of installing on lower valve shaft 4 for seal assembly 2 position is fixed, ensures sealed effect, and through the connection of last valve shaft 3 and lower valve shaft 4, can provide certain pretightning force, the connected form on upper portion of last valve shaft 3 can be any form such as square shaft, flat axle according to drive mode's difference. The shaft body 1 can be suitable for special sealing rings 203 made of various sanitary materials and sealing rings 203 with poor rebound resilience, and is used for various pipelines with medium requirement clean height, and the structure is lower than the torque of the traditional packing sealing group, and the sealing service life on the valve shaft is long.
Further, the method further comprises the following steps: a thread bush 5;
A first inner chamber 6 provided on the upper valve shaft 3;
a first internal thread portion 7 provided on an inner wall of the first inner cavity 6;
a second inner cavity 8 provided on the lower valve shaft 4;
A second internal thread part 9 provided on the inner wall of the second inner cavity 8;
The thread bushing 5 is screwed with the first internal thread part 7 and the second internal thread part 9 at both sides for connecting the upper valve shaft 3 and the lower valve shaft 4.
In this embodiment, the upper valve shaft 3 and the lower valve shaft 4 are fixedly connected together by using a threaded connection manner, the first internal thread portion 7 and the second internal thread portion 9 are processed in the upper valve shaft 3 and the lower valve shaft 4, and then the first internal thread portion and the second internal thread portion are respectively connected with each other by the thread sleeve 5, so that the upper valve shaft 3 and the lower valve shaft 4 are fixedly connected.
Further, the lower valve shaft 4 is externally provided with an annular mounting portion 10, the seal assembly 2 is sleeved on the mounting portion 10, and the seal assembly 2 comprises:
A plurality of seal rings 201, wherein the plurality of seal rings 201 are all sleeved on the mounting part 10 in a sliding way;
A plurality of sealing areas 202, wherein a sealing area 202 is formed between the sealing ring 201 adjacent to the side wall of the mounting part 10 and the mounting part 10, a sealing area 202 is formed between the sealing ring 201 close to the upper valve shaft 3 and the upper valve shaft 3, and a sealing area 202 is formed between two adjacent sealing rings 201;
A plurality of sealing rings 203, wherein each sealing area 202 is sleeved with one sealing ring 203 for sealing between the shaft body 1 and the shell;
And a packing 204, wherein the packing 204 is disposed between the upper valve shaft 3 and the lower valve shaft 4.
In this embodiment, the outer portion of the lower valve shaft 4 is provided with an annular mounting portion 10 for mounting the seal assembly 2, in the mounting process, firstly, a seal ring 203 is mounted, the seal ring 203 is sleeved between a seal ring 201 adjacent to the side wall of the mounting portion 10 and the mounting portion 10 to form a seal area 202, then the seal ring 201 is sleeved, then the seal ring 203 and the seal ring 201 are sleeved in sequence, so that the seal ring 203 and the seal ring 201 are adjacently arranged, the seal ring 203 is arranged in the seal area 202, after the seal ring 203 is mounted, a seal gasket 204 is mounted between the upper valve shaft 3 and the lower valve shaft, finally, the upper valve shaft 3 and the lower valve shaft are fixed through threaded connection, and meanwhile, the upper valve shaft 3 tightly abuts and limits the seal assembly 2.
Further, still include the tensioning assembly 11, the tensioning assembly 11 includes:
A plurality of guide holes 1101, a plurality of guide holes 1101 are provided on the lower valve shaft 4, the guide holes 1101 are provided in a radial direction, the guide holes 1101 are positioned opposite to the seal ring 201 adjacent to the side wall of the mounting portion 10,
The plurality of tensioning rods 1102 are arranged, one tensioning rod 1102 is arranged in each guide hole 1101 in a sliding sealing manner, one end of each tensioning rod 1102 extends out of the lower valve shaft 4 and then abuts against the inner wall of the sealing ring 201 adjacent to the side wall of the mounting part 10, and is used for propping against the sealing ring 201 adjacent to the side wall of the mounting part 10;
an adjusting member 12, the adjusting member 12 comprising:
The adjusting block 1201 is slidably disposed in the second inner cavity 8 along the axial direction of the lower valve shaft 4, and a side surface of the adjusting block 1201 contacts one end of all the tension rods 1102, so that all the tension rods 1102 displace in the radial direction of the lower valve shaft 4 and press against the sealing ring 201.
In this embodiment, during the installation process, there may be a shift in the position of the seal ring 203 or the seal ring 201, and wear occurs during the use process, resulting in poor sealing effect, so the tensioning assembly 11 is adopted to further fix, so that even if the seal ring 203 wears, the shift in the position of the adjacent seal rings 201 is not affected, thereby ensuring the overall sealing effect, after the seal assembly 2 is installed in the specific implementation process, the upper valve shaft 3 fixes the position of the seal assembly 2, the adjusting member 12 is disposed in the second inner cavity 8, the guide hole 1101 is opposite to the position of the seal ring 201 adjacent to the side wall of the installation portion 10, so the contact position of the adjusting member 12 and the tensioning rod 1102 is controlled, the tensioning rod 1102 is adjusted, so that the corresponding seal ring 201 is fully abutted against, the corresponding seal ring 201 is fixed in the radial direction, and two seal rings 203 adjacent to the seal ring 201 are worn or shifted to a certain extent and also cannot affect the seal ring 201, thereby ensuring the tightness of the other side adjacent to the seal ring 201, and improving the sealing effect.
Further, the method further comprises the following steps:
the first clamping groove 13 is of a polygonal structure, and the first clamping groove 13 is arranged in the first inner cavity 6;
the second clamping groove 14 is of a polygonal structure, and the second clamping groove 14 is arranged in the second inner cavity 8;
The regulating member 12 further includes:
The adjusting block 1201 is of a polygonal structure in plug-in fit with the first clamping groove 13;
An adjusting rod 1202, an adjusting block 1201 is arranged at one end of the adjusting rod 1202, the adjusting rod 1202 passes through the screw sleeve 5,
The clamping block 1203 is arranged at the other end of the adjusting rod 1202, and the clamping block 1203 is of a polygonal structure in plug-in fit with the second clamping groove 14;
When a part of the adjusting block 1201 is inserted into the first clamping groove 13, the clamping block 1203 pushes the tensioning rod 1102 to jack the corresponding sealing ring 201, and meanwhile, the clamping block 1203 is inserted into the second clamping groove 14.
In this embodiment, in the use process, there is rotation of the shaft body 1, the connection manner of the threads needs to be further reinforced, so an adjusting rod 1202 provided with a polygonal structure adjusting block 1201 and a clamping block 1203 is designed, after the installation of the upper valve shaft 3 is completed, the adjusting rod 1202 is inserted into the shaft body 1, the adjusting block 1201 is in insertion fit with the first clamping groove 13, the clamping block 1203 is in insertion fit with the second clamping groove 14, after the installation of the upper valve shaft 3 is completed, the second clamping groove 14 in the second inner cavity 8 can be ensured to correspond to the first clamping groove 13 in the first inner cavity 6, the polygonal sides are arranged in parallel, when a part of the adjusting block 1201 is inserted into the first clamping groove 13, the clamping block 1203 is contacted with the tensioning rod 1102, the front end of the adjusting rod 1202 is pushed to be in insertion fit with the second clamping groove 14, so that the insertion position is fixed, and meanwhile, because of the insertion fit of the polygonal structure, the relative rotation of the valve shaft is not easy to occur in the rotation process, and the stability of the valve shaft 3 and the lower valve shaft is improved effectively.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (5)
1. The utility model provides an axial pretightning force seal shaft structure, includes axis body (1), its characterized in that still includes:
a sealing assembly (2) for sealing between the shaft body (1) and the housing;
The shaft body (1) includes:
An upper valve shaft (3) and a lower valve shaft (4), the lower valve shaft (4) being detachably provided on the upper valve shaft (3);
The sealing assembly (2) is sleeved on the lower valve shaft (4) and is used for sealing between the lower valve shaft (4) and the shell, and when the upper valve shaft (3) is installed on the lower valve shaft (4), the upper valve shaft (3) provides axial positioning and jacking force for the sealing assembly (2).
2. The axial preload seal shaft structure as defined in claim 1, further comprising:
a thread bush (5);
a first inner cavity (6) arranged on the upper valve shaft (3);
A first internal thread part (7) arranged on the inner wall of the first inner cavity (6);
A second inner cavity (8) arranged on the lower valve shaft (4);
A second internal thread part (9) arranged on the inner wall of the second inner cavity (8);
The two sides of the threaded sleeve (5) are respectively in threaded connection with the first internal thread part (7) and the second internal thread part (9) and are used for connecting the upper valve shaft (3) and the lower valve shaft (4).
3. An axial pretension seal shaft structure according to claim 2, wherein the lower valve shaft (4) has an annular mounting portion (10) on the outside, the seal assembly (2) is sleeved on the mounting portion (10), the seal assembly (2) includes:
A plurality of seal rings (201), wherein the plurality of seal rings (201) are sleeved on the mounting part (10) in a sliding way;
A plurality of sealing areas (202), wherein the sealing areas (202) are formed between the sealing rings (201) adjacent to the side wall of the mounting part (10) and the mounting part (10), the sealing areas (202) are formed between the sealing rings (201) close to the upper valve shaft (3) and the upper valve shaft (3), and the sealing areas (202) are formed between two adjacent sealing rings (201);
The sealing rings (203) are arranged in a plurality, and each sealing area (202) is sleeved with one sealing ring (203) for sealing between the shaft body (1) and the shell;
And a gasket (204), wherein the gasket (204) is arranged between the upper valve shaft (3) and the lower valve shaft (4).
4. An axial pretension seal shaft arrangement according to claim 3, further comprising a tensioning assembly (11), said tensioning assembly (11) comprising:
A plurality of guide holes (1101), a plurality of the guide holes (1101) are arranged on the lower valve shaft (4), the guide holes (1101) are arranged along the radial direction, the guide holes (1101) are opposite to the sealing ring (201) adjacent to the side wall of the mounting part (10),
The plurality of tensioning rods (1102) are arranged, one tensioning rod (1102) is arranged in each guide hole (1101) in a sliding sealing mode, one end of each tensioning rod (1102) extends out of the lower valve shaft (4) and then abuts against the inner wall of the sealing ring (201) adjacent to the side wall of the mounting part (10), and the sealing ring (201) adjacent to the side wall of the mounting part (10) is tightly propped against the sealing ring;
an adjustment member (12), the adjustment member (12) comprising:
The adjusting block (1201) is arranged in the second inner cavity (8) in a sliding manner along the axial direction of the lower valve shaft (4), and the side surface of the adjusting block (1201) is in contact with one end of all the tensioning rods (1102), so that all the tensioning rods (1102) displace in the radial direction of the lower valve shaft (4) and jack the sealing ring (201).
5. The axial preload seal shaft structure as defined in claim 4, further comprising:
The first clamping groove (13) is of a polygonal structure, and the first clamping groove (13) is arranged in the first inner cavity (6);
The second clamping groove (14) is of a polygonal structure, and the second clamping groove (14) is arranged in the second inner cavity (8);
The adjusting member (12) further includes:
The adjusting block (1201) is of a polygonal structure in plug-in fit with the first clamping groove (13);
The adjusting rod (1202), the adjusting block (1201) is arranged at one end of the adjusting rod (1202), the adjusting rod (1202) passes through the screw sleeve (5),
The clamping block (1203) is arranged at the other end of the adjusting rod (1202), and the clamping block (1203) is of a polygonal structure in plug-in fit with the second clamping groove (14);
When a part of the adjusting block (1201) is inserted into the first clamping groove (13), the adjusting block (1201) pushes the tensioning rod (1102) to jack the corresponding sealing ring (201), and meanwhile the clamping block (1203) is inserted into the second clamping groove (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322902937.5U CN221034278U (en) | 2023-10-28 | 2023-10-28 | Axial pretightening force sealing shaft structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322902937.5U CN221034278U (en) | 2023-10-28 | 2023-10-28 | Axial pretightening force sealing shaft structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221034278U true CN221034278U (en) | 2024-05-28 |
Family
ID=91170406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322902937.5U Active CN221034278U (en) | 2023-10-28 | 2023-10-28 | Axial pretightening force sealing shaft structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221034278U (en) |
-
2023
- 2023-10-28 CN CN202322902937.5U patent/CN221034278U/en active Active
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| GR01 | Patent grant |