CN213900310U - Rotary CF blind flange plugging structure - Google Patents
Rotary CF blind flange plugging structure Download PDFInfo
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- CN213900310U CN213900310U CN202022516592.6U CN202022516592U CN213900310U CN 213900310 U CN213900310 U CN 213900310U CN 202022516592 U CN202022516592 U CN 202022516592U CN 213900310 U CN213900310 U CN 213900310U
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Abstract
The utility model discloses a rotary CF blind flange plugging structure, which comprises a pipeline, a connecting flange and an external thread pipe, wherein the connecting flange is fixedly and hermetically installed at one end of the pipeline, the end of the connecting flange is fixedly and hermetically connected with the external thread pipe, the peripheral side of the external thread pipe is in threaded connection with an internal thread, the internal thread is arranged in an inner cylinder, the bottom of the inner cylinder is provided with a sealing groove, a sealing gasket is arranged in the sealing groove, the peripheral side of the inner cylinder is in clearance fit with the inner side of the blind flange, the peripheral side of the inner cylinder is fixedly connected with a limit protrusion, the limit protrusion is in sliding connection with a limit groove, the limit groove is arranged in the inner side of the blind flange, the end part of the external thread pipe is abutted against the sealing gasket, plugging and sealing can be carried out, the end of the external thread pipe has the, and the internal thread and the external thread are difficult to loosen.
Description
Technical Field
The utility model relates to a flange technical field specifically is a rotation type CF blind flange block structure.
Background
The english name for CF flange is Conflat panel. The CF blind flange is used for flange connection in high vacuum and ultrahigh vacuum, one of the functions of the CF blind flange is to block the tail end of a pipeline, the CF blind flange has the function of conveniently removing sundries in the pipeline during maintenance, each flange opening on a container is blocked by adopting a blind flange before a vacuum container is subjected to a vacuum test, the blind flange is tightly connected with a flange on the container through a flange connecting bolt, and the flange opening on the container is sealed and blocked by the blind flange.
The existing CF blind flange is usually directly butted with a pipeline flange, and in actual use, the sealing of a flange port on a container is easy to leak and inconvenient to use due to different screwing forces for screwing each flange bolt.
For this reason we propose a rotary CF blind flange plugging structure to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a rotation type CF blind flange block structure to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a rotary CF blind flange plugging structure comprises a pipeline, a connecting flange and an external thread pipe, wherein the connecting flange is fixedly and hermetically installed at one end of the pipeline, the end of the connecting flange is fixedly and hermetically connected with an external thread pipe, the peripheral side of the external thread pipe is in threaded connection with an internal thread, the internal thread is arranged in the inner cylinder, the bottom of the inner cylinder is provided with a sealing groove, a sealing gasket is arranged in the sealing groove, the peripheral side of the inner cylinder is in clearance fit with the inner side of the blind flange, the peripheral side of the inner cylinder is fixedly connected with a limiting protrusion, the limiting protrusion is connected with a limiting groove in a sliding manner, the limiting groove is formed in the inner side of the blind flange, an annular groove is formed in the end faces of the blind flange and the connecting flange, the inner side of the annular groove is provided with a sealing ring, the end faces of the blind flange and the connecting flange are provided with a plurality of connecting holes, a locking bolt penetrates through the connecting holes, and the locking bolt is in threaded connection with a locking nut.
Preferably, the end of the external threaded pipe is provided with an inward retraction taper, and the internal thread is arranged relative to the taper of the external threaded pipe.
Preferably, the end face of the inner cylinder slightly protrudes out of the end face of the blind flange.
Preferably, the length of the limiting protrusion is only half of that of the limiting groove, and the limiting protrusion is symmetrically arranged.
Preferably, the external threaded tube has an axial length slightly longer than the internal thread.
Preferably, the sealing ring is in clearance fit with the annular groove, and the sealing ring is composed of a soft rubber strip.
Compared with the prior art, the beneficial effects of the utility model are that: the internal thread is screwed on the external thread pipe, when the external thread pipe is screwed to the bottom of the internal thread, the end part of the external thread pipe abuts against the sealing gasket, sealing and plugging can be carried out, the end of the external thread pipe has an inward retracting taper, the internal thread is arranged relative to the taper of the external thread pipe, the sealing and fastening effect can be improved, leakage is avoided, and the internal thread and the external thread pipe are difficult to loosen;
through locking bolt and nut, make blind flange and flange be in close association together, the inner tube terminal surface is slightly outstanding blind flange terminal surface simultaneously, and the inner tube is difficult to the activity under the tight joint of blind flange inboard diapire and flange terminal surface, plays a locking effect, makes it connect more closely, and simultaneously, the power of screwing of each flange bolt difference also can not lead to sealed receiving the influence.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the overall structure of the present invention;
fig. 3 is a schematic cross-sectional view of the inner tube of the present invention.
In the figure: 1. a gasket; 2. a blind flange; 3. an inner barrel; 4. an internal thread; 5. a seal ring; 6. an externally threaded tube; 7. a connecting flange; 8. a sealing groove; 9. an annular groove; 10. connecting holes; 11. locking the nut; 12. locking the bolt; 13. a pipeline; 21. a limiting groove; 31. the limit is protruded.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a rotary CF blind flange plugging structure comprises a pipeline 13, the sealing device comprises a connecting flange 7 and an external threaded pipe 6, one end of a pipeline 13 is fixedly and hermetically mounted with the connecting flange 7, the end of the connecting flange 7 is fixedly and hermetically connected with the external threaded pipe 6, the peripheral side of the external threaded pipe 6 is in threaded connection with an internal thread 4, the internal thread 4 is arranged inside an inner barrel 3, the bottom of the inner barrel 3 is provided with a sealing groove 8, the inside of the sealing groove 8 is provided with a sealing gasket 1, the peripheral side of the inner barrel 3 is in clearance fit with the inner side of a blind flange 2, the peripheral side of the inner barrel 3 is fixedly connected with a limiting protrusion 31, the limiting protrusion 31 is in sliding connection with a limiting groove 21, the limiting groove 21 is arranged inside the blind flange 2, the blind flange 2 and the end face of the connecting flange 7 are provided with an annular groove 9, the inner side of the annular groove 9 is provided with a sealing ring 5, the blind flange 2 and the end face of the connecting flange 7 are provided with a plurality of connecting holes 10, locking bolts 12 penetrate through the connecting holes 10, and the locking bolts 12 are in threaded connection with locking nuts 11.
The end of the external thread pipe 6 is provided with an inward retraction taper, and the internal thread 4 is arranged corresponding to the taper of the external thread pipe 6.
The end surface of the inner cylinder 3 slightly protrudes out of the end surface of the blind flange 2.
The length of the limiting protrusion 31 is only half of the length of the limiting groove 21, and the limiting protrusion is symmetrically arranged.
The male screw 6 has a slightly longer axial length than the female screw 4.
The sealing ring 5 is in clearance fit with the annular groove 9, and the sealing ring 5 is composed of a soft rubber strip.
The working principle is as follows: when the utility model is used, firstly, the sealing gasket 1 is placed in the sealing groove 8, the sealing ring 5 is clamped in the annular groove 9, the blind flange 2 is rotated, then the limit protrusion 31 slides to one side of the limit groove 21 to drive the inner barrel 3 to rotate, so that the inner thread 4 is screwed on the outer threaded pipe 6, when the outer threaded pipe 6 is screwed to the bottom of the inner thread 4, the end part of the outer threaded pipe 6 is abutted against the sealing gasket 8, after the inner barrel 3 is screwed, the blind flange 2 is rotated reversely, because the length of the limit protrusion 31 is only half of the limit groove 21, the limit protrusion 31 has a certain moving range in the limit groove 21, so that the blind flange 2 is aligned with a plurality of connecting holes 10 arranged on the end surface of the connecting flange 7, the locking bolt 12 passes through the connecting holes 10, the locking nut 11 is screwed, so that the blind flange 2 is tightly combined with the connecting flange 7, meanwhile, the end surface of the inner barrel 3 is slightly protruded out of the blind flange 2, the inner cylinder 8 is difficult to move under the common clamping of the bottom wall of the inner side of the blind flange 2 and the end face of the connecting flange 7, and the looseness and the generation of gaps are avoided.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a rotation type CF blind flange block structure, includes pipeline (13), flange (7) and external screw thread pipe (6), its characterized in that: the pipeline (13) one end fixed seal installation flange (7), flange (7) end fixed seal connects external screw thread pipe (6), external screw thread pipe (6) week side threaded connection internal thread (4), internal thread (4) are seted up inside inner tube (3), seal groove (8) have been seted up to inner tube (3) bottom, seal groove (8) inside is equipped with sealed the pad (1), inner tube (3) week side clearance fit blind flange (2) inboard, the spacing salient (31) of all sides fixed connection of inner tube (3), spacing salient (31) sliding connection spacing groove (21), spacing groove (21) are seted up in blind flange (2) inboard, blind flange (2) are equipped with ring channel (9) with flange (7) terminal surface, ring channel (9) inboard is equipped with sealing washer (5), a plurality of connecting holes (10) have been seted up with flange (7) terminal surface blind flange (2), a locking bolt (12) penetrates through the connecting hole (10), and the locking bolt (12) is in threaded connection with a locking nut (11).
2. The rotary CF blind flange plugging structure according to claim 1, wherein: the end of the external threaded pipe (6) is provided with an inward-retracting taper, and the internal thread (4) is arranged corresponding to the taper of the external threaded pipe (6).
3. The rotary CF blind flange plugging structure according to claim 1, wherein: the end face of the inner cylinder (3) slightly protrudes out of the end face of the blind flange (2).
4. The rotary CF blind flange plugging structure according to claim 1, wherein: the length of the limiting protrusion (31) is only half of that of the limiting groove (21) and the limiting protrusion is symmetrically arranged.
5. The rotary CF blind flange plugging structure according to claim 1, wherein: the axial length of the external thread pipe (6) is slightly longer than that of the internal thread (4).
6. The rotary CF blind flange plugging structure according to claim 1, wherein: the sealing ring (5) is in clearance fit with the annular groove (9), and the sealing ring (5) is composed of soft rubber strips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022516592.6U CN213900310U (en) | 2020-11-04 | 2020-11-04 | Rotary CF blind flange plugging structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022516592.6U CN213900310U (en) | 2020-11-04 | 2020-11-04 | Rotary CF blind flange plugging structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213900310U true CN213900310U (en) | 2021-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022516592.6U Active CN213900310U (en) | 2020-11-04 | 2020-11-04 | Rotary CF blind flange plugging structure |
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| Country | Link |
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| CN (1) | CN213900310U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992844A (en) * | 2022-06-26 | 2022-09-02 | 镇江东方山源电热有限公司 | Conveniently-assembled layered electric heater |
-
2020
- 2020-11-04 CN CN202022516592.6U patent/CN213900310U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992844A (en) * | 2022-06-26 | 2022-09-02 | 镇江东方山源电热有限公司 | Conveniently-assembled layered electric heater |
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