CN110725846A - Sealing nut assembly - Google Patents
Sealing nut assembly Download PDFInfo
- Publication number
- CN110725846A CN110725846A CN201910860669.0A CN201910860669A CN110725846A CN 110725846 A CN110725846 A CN 110725846A CN 201910860669 A CN201910860669 A CN 201910860669A CN 110725846 A CN110725846 A CN 110725846A
- Authority
- CN
- China
- Prior art keywords
- nut
- sealing ring
- seal
- ring
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 90
- 210000004907 gland Anatomy 0.000 claims description 13
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/004—Sealing; Insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/14—Cap nuts; Nut caps or bolt caps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
- F16B43/001—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts for sealing or insulation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention relates to the technical field of fastening, in particular to a seal nut assembly. The seal nut assembly comprises a nut and a seal ring; the sealing ring is arranged at one end of the nut and is coaxial with the threaded hole of the nut; the end face of the sealing ring protrudes out of the corresponding end face of the nut so as to be pressed tightly on the connected piece by the nut when in use, the sealing ring is extruded axially to deform radially, and the sealing ring can hold a matched bolt tightly to realize axial sealing. The sealing nut assembly is used for solving the problem that the existing bolt and nut cannot be suitable for being connected by a connecting piece in an environment with high sealing grade requirements.
Description
Technical Field
The invention relates to the technical field of fastening, in particular to a seal nut assembly.
Background
The nut and bolt connection has a self-locking function, so that the firm connection of various connected pieces can be ensured, and the nut and bolt connection is common in the fastening technical field; when the nut and the bolt are used, a metal washer is generally arranged between the nut and a connected piece, and the metal washer can be extruded and deformed in the relative screwing process of the bolt and the nut, so that the axial acting force is provided for the nut, and the anti-loosening effect is achieved.
In many use environments, it is necessary to ensure the sealing at the connection position of the connected member, such as the sealing between the mating surfaces of the bolt and the nut, the sealing between the contact surface of the nut and the connected member, and the like, while the bolt and the nut commonly used at present only have the fastening function, but have no sealing function, and cannot be applied to the environment with higher sealing grade requirements.
Disclosure of Invention
The invention aims to provide a sealing nut assembly which is used for solving the problem that the existing bolt nut cannot be suitable for being connected by a connected piece in an environment with high sealing grade requirement.
In order to achieve the purpose, the sealing nut assembly provided by the invention adopts the following technical scheme:
the gland nut assembly includes:
a nut;
the sealing ring is arranged at one end of the nut and is coaxial with the threaded hole of the nut;
the end face of the sealing ring protrudes out of the corresponding end face of the nut so as to be pressed tightly on the connected piece by the nut when in use, the sealing ring is extruded axially to deform radially, and the sealing ring can hold a matched bolt tightly to realize axial sealing.
The seal nut assembly provided by the invention has the beneficial effects that: the sealing washer is installed to this nut component's nut one end, and the terminal surface protrusion of sealing washer in the corresponding terminal surface of nut, when using, the sealing washer is compressed tightly on by the connecting piece by the nut, thereby can realize the nut and by the sealed between the corresponding face of connecting piece, moreover, the sealing washer receives the axial extrusion and takes place radial deformation, thereby hold supporting bolt tightly, and then can realize the sealed between the fitting surface of nut and supporting bolt, this sealing nut component cooperation bolt uses whole sealed effect better, can be applicable to in the environment that the sealed grade requires high.
Furthermore, the end part of the nut is provided with a mounting groove for mounting the sealing ring, the mounting groove is coaxial and communicated with the threaded hole of the nut, the sealing ring is mounted in the mounting groove, and the wall of the mounting groove blocks the sealing ring at the radial outer side when the sealing ring is radially deformed. Due to the arrangement, the sealing ring can only deform inwards when being subjected to axial extrusion and subjected to radial deformation, and the thickness of the sealing ring can be reduced under the condition that the radial deformation of the sealing ring can tightly hold a matched bolt, so that the cost is saved.
Furthermore, the mounting groove is formed inwards from the end face of the nut. With the arrangement, the nut is simple in structure and convenient to manufacture.
Further, the sealing ring is in interference fit with the mounting groove. The arrangement is convenient for the installation of the sealing ring.
Further, the inner diameter of the sealing ring is equal to the outer diameter of the thread at the threaded hole. Set up like this, before the sealing washer is extruded, in the sealing washer can not disturb supporting bolt insert nut, and just alright satisfy the sealing washer under less deformation and hold supporting bolt tightly, and then can reduce the thickness of sealing washer, reduction in production cost.
Furthermore, the outer peripheral surface of one end of the sealing ring, which is far away from the nut, is a conical surface which gradually decreases in the direction far away from the nut. Due to the arrangement, when the sealing ring is axially extruded, the sealing ring can be better deformed inwards, so that the matched bolt can be held tightly more firmly.
Furthermore, the sealing ring is made of polytetrafluoroethylene. Polytetrafluoroethylene has the advantage of corrosion protection and electrical insulation.
Furthermore, one end of the nut, which is far away from the sealing ring, is provided with a locking ring through flanging in a pressing manner, and the inner diameter of the locking ring is smaller than the outer diameter of the thread at the threaded hole and larger than the inner diameter of the thread at the threaded hole. The locking ring is arranged, and after the nut is screwed with the matched bolt, the locking ring is extruded by the matched bolt to tightly hold the matched bolt, so that the nut body and the matched bolt can be prevented from loosening.
Furthermore, a sealing cover body is integrally arranged on the inner side of the flanging on the end face of the locking ring, and a yielding space for yielding the end part of the matched bolt is arranged in the sealing cover body. Set up like this, can advance the shape to the tip of the threaded rod of supporting bolt and seal after nut and supporting bolt thread locking, prevent that the screw thread on the supporting bolt from being destroyed and leading to unable dismantlement in the use, can seal the connection position of nut and supporting bolt moreover, and then prevent that both screw threads from being rusted and leading to unable dismantlement.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a gland nut assembly provided by the present invention;
FIG. 2 is a cross-sectional view of an embodiment of a gland nut assembly provided by the present invention;
FIG. 3 is a schematic structural view of a nut in an embodiment of a gland nut assembly provided by the present invention;
FIG. 4 is a schematic structural view of a seal housing in an embodiment of a seal nut assembly provided by the present invention;
FIG. 5 is a schematic diagram of a packing in an embodiment of a gland nut assembly provided in the present invention.
In the drawings: 1-nut, 2-sealing ring, 3-sealing cover, 4-threaded hole, 7-mounting groove, 8-step surface, 9-annular groove, 10-stopping surface, 11-groove wall, 12-stopping edge, 13-locking ring, 14-cover body, 15-conical surface and 17-abdicating space.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
Embodiments of the seal nut assembly provided by the present invention:
as shown in fig. 1 and 2, the gland nut assembly includes a nut 1, a packing 2 mounted at a lower end of the nut 1, and a gland cap 3 mounted at an upper end of the nut 1; in this embodiment, the material of the seal ring 2 is ptfe SFBN.
As shown in fig. 1-3, a threaded hole 4 is formed in the middle region of the nut 1, an installation groove 7 for installing the seal ring 2 is formed in the lower end of the nut, an annular groove 9 for installing the seal cover 3 is formed in the upper end of the nut, and the threaded hole 4, the installation groove 7 and the annular groove 9 are coaxially arranged and are communicated up and down; the mounting groove 7 is formed upwards from the lower end face of the nut 1, the inner diameter of the mounting groove 7 is larger than the outer diameter of threads at the threaded hole 4, so that a step surface 8 is formed between the mounting groove 7 and the threaded hole 4, the sealing ring 2 is mounted in the mounting groove 7 in an interference fit mode, the upper end face of the sealing ring 2 is in contact with the step surface 8, and after the sealing ring 2 is mounted in the mounting groove 7, the lower end of the sealing ring extends out of the mounting groove 7; the inner diameter of the sealing ring 2 is equal to the outer diameter of the thread at the threaded hole 4 after installation.
The lower end of the sealing ring 2 extends out of the mounting groove 7, when the nut 1 is tightly pressed by a connecting piece, the sealing ring 2 can radially deform, the deformation of the sealing ring 2 is plastic deformation, and the sealing ring 2 holds a matched bolt tightly after the sealing ring 2 deforms; by the arrangement, not only is the sealing between the corresponding surfaces of the nut 1 and the connected piece realized, but also the deformed sealing ring 2 can be filled into the thread groove of the external thread on the matched bolt, so that the connection part is sealed along the axial direction of the matched bolt, and meanwhile, the locking between the matched bolt and the nut 1 can be further realized by tightly holding the matched bolt by the sealing ring 2.
As shown in fig. 1, 2 and 4, an annular groove wall 11 extends upwards from the upper end of the nut 1 to form an annular groove 9, and the inner diameter of the annular groove 9 is larger than the outer diameter of the thread at the threaded hole 4, so that a stop surface 10 is formed between the annular groove 9 and the threaded hole 4; the sealing cover 3 comprises a locking ring 13 and a cover body 14 integrally arranged on the inner side of the upper end face of the locking ring 13, the locking ring 13 is in a circular ring shape and is formed by nylon injection molding, after the sealing cover 3 is installed in the annular groove 9, the lower end face of the locking ring 13 is contacted with the stop face 10, the groove wall 11 of the annular groove 9 is bent inwards to form a stop edge 12, the stop edge 12 presses the upper end face of the locking ring 13, so that the locking ring 13 is fixed in the annular groove 9, the cover body 14 is in a cylindrical shape, the upper end of the cover body is closed, and a abdicating space 17 for a rod section of a matched bolt to extend into is; in order to prevent the seal cover 3 from moving in the radial direction, the outer diameter of the locking ring 13 is set to be equal to the inner diameter of the annular groove 9; the inner diameter of the locking ring 13 is larger than the inner diameter of the thread at the threaded hole 4 and smaller than the outer diameter of the thread at the threaded hole 4, so that when the locking ring 13 is used, a matched bolt can radially extrude the locking ring 13, and the locking ring 13 can also tightly hold the matched bolt, thereby realizing the anti-loosening of the bolt and the nut assembly; the retaining edge 12 forms a flange for the press-fit locking ring 13.
As shown in fig. 5, in order to facilitate the radial inward deformation of the sealing ring 2, the outer peripheral surface of the lower end of the sealing ring 2 is provided with a tapered surface 15 which is gradually reduced from top to bottom, so that when the sealing ring 2 is extruded, the sealing ring 2 is more convenient to deform radially inward, and thus the supporting bolt can be held tightly.
In the above embodiments, the inner diameter of the seal ring after installation (i.e. before deformation) is equal to the outer diameter of the thread at the threaded bore. In other embodiments, the inner diameter of the installed sealing ring may also be larger than the outer diameter of the thread at the threaded hole, for example, the inner diameter of the installed sealing ring is larger than the outer diameter of the thread at the threaded hole by 0.1mm, as long as it is ensured that the sealing ring can hug the mating bolt tightly to realize axial sealing after being extruded and deformed by the step surface and the connecting piece.
In the above embodiment, the outer peripheral surface of the lower end of the seal ring is formed as a tapered surface. In other embodiments, the sealing ring may be a cylindrical hollow structure as a whole, and the same can be used.
In the above embodiment, the seal ring is installed in the installation groove by interference fit. In other embodiments, the sealing ring may be fixed in the mounting groove by other means, such as by adhesion.
In the above embodiment, the mounting groove extends upwards from the lower end surface of the nut into the nut. In other embodiments, the mounting groove may be formed by extending an annular groove wall from the lower end surface of the nut in the present embodiment downward, and the same may be used.
In the above embodiment, the packing is mounted on the nut through the mounting groove. In other embodiments, the sealing ring may be mounted on the nut in other manners, such as directly bonded to the lower end surface of the nut, or a ring of annular wall plate extends downward from the lower end surface of the nut, an annular groove is formed in the sealing ring corresponding to the annular wall plate, and the sealing ring is inserted into the wall plate of the nut through the groove to be mounted, which is also applicable.
In the above embodiment, the material of the sealing ring is ptfe SFBN. In other embodiments, the material of the sealing ring may also be rubber, which may also be used, and the deformation of the sealing ring made of rubber during use is elastic deformation.
In the above embodiment, the inner diameter of the locking ring is smaller than the outer diameter of the thread at the threaded hole and larger than the inner diameter of the thread at the threaded hole. In other embodiments, the inner diameter of the locking ring may be greater than the outer diameter of the threads at the threaded bore, or less than the inner diameter of the threads at the threaded bore.
In the above embodiment, the seal cap includes a locking ring and a cap body. In other embodiments, the cover may not be provided, only the locking ring may be provided, and the same may be used.
Claims (9)
1. A gland nut assembly, comprising:
a nut;
the sealing ring is arranged at one end of the nut and is coaxial with the threaded hole of the nut;
the end face of the sealing ring protrudes out of the corresponding end face of the nut so as to be pressed tightly on the connected piece by the nut when in use, the sealing ring is extruded axially to deform radially, and the sealing ring can hold a matched bolt tightly to realize axial sealing.
2. The seal nut assembly of claim 1 wherein the end of the nut has a mounting groove for receiving the seal ring, the mounting groove being coaxial with and in communication with the threaded bore of the nut, the seal ring being mounted in the mounting groove, and the groove wall of the mounting groove retaining the seal ring radially outwardly upon radial deformation of the seal ring.
3. The seal nut assembly of claim 2 wherein the mounting groove opens inwardly from the end face of the nut.
4. A gland nut assembly according to claim 2 or claim 3 wherein the sealing ring is an interference fit with the mounting groove.
5. A gland nut assembly according to claim 1, 2 or 3 wherein the internal diameter of the sealing ring is equal to the external diameter of the thread at the threaded bore.
6. A gland nut assembly according to claim 1, 2 or 3, wherein the outer periphery of the end of the packing facing away from the nut is tapered so as to decrease in the direction away from the nut.
7. A gland nut assembly according to claim 1, 2 or 3, wherein the sealing ring is of ptfe.
8. A gland nut assembly according to claim 1, 2 or 3 wherein the end of the nut remote from the sealing ring is crimped with a locking ring having an internal diameter which is less than the external diameter of the thread at the threaded bore and greater than the internal diameter of the thread at the threaded bore.
9. The seal nut assembly of claim 8 wherein the end surface of the locking ring is integrally provided with a seal cage inside the flange, the seal cage having a space for providing access to the end of the mating bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910860669.0A CN110725846A (en) | 2019-09-11 | 2019-09-11 | Sealing nut assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910860669.0A CN110725846A (en) | 2019-09-11 | 2019-09-11 | Sealing nut assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110725846A true CN110725846A (en) | 2020-01-24 |
Family
ID=69218967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910860669.0A Pending CN110725846A (en) | 2019-09-11 | 2019-09-11 | Sealing nut assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110725846A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303095A (en) * | 2020-10-16 | 2021-02-02 | 张志勇 | Self-locking nut for sealing supporting plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4105741A1 (en) * | 1991-02-23 | 1992-09-03 | Daimler Benz Ag | Screw nut especially cap nut for sealing screw hole - has annular end surface, with sealing ring and groove |
| CN105201992A (en) * | 2015-10-16 | 2015-12-30 | 贵州航天精工制造有限公司 | Sealed self-locking nut and manufacturing method thereof |
| CN105221546A (en) * | 2015-09-22 | 2016-01-06 | 河南航天精工制造有限公司 | The locking element used in a kind of sealed type self-locking nut and this self-locking nut |
| CN107061467A (en) * | 2015-10-22 | 2017-08-18 | Lisi航空 | Sealing nut |
| CN107956780A (en) * | 2017-12-25 | 2018-04-24 | 天津市精紧固件有限公司 | A kind of water proof and dust proof end nut |
-
2019
- 2019-09-11 CN CN201910860669.0A patent/CN110725846A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4105741A1 (en) * | 1991-02-23 | 1992-09-03 | Daimler Benz Ag | Screw nut especially cap nut for sealing screw hole - has annular end surface, with sealing ring and groove |
| CN105221546A (en) * | 2015-09-22 | 2016-01-06 | 河南航天精工制造有限公司 | The locking element used in a kind of sealed type self-locking nut and this self-locking nut |
| CN105201992A (en) * | 2015-10-16 | 2015-12-30 | 贵州航天精工制造有限公司 | Sealed self-locking nut and manufacturing method thereof |
| CN107061467A (en) * | 2015-10-22 | 2017-08-18 | Lisi航空 | Sealing nut |
| CN107956780A (en) * | 2017-12-25 | 2018-04-24 | 天津市精紧固件有限公司 | A kind of water proof and dust proof end nut |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303095A (en) * | 2020-10-16 | 2021-02-02 | 张志勇 | Self-locking nut for sealing supporting plate |
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