CN219198110U - Split type pressure control double-sealing plug - Google Patents
Split type pressure control double-sealing plug Download PDFInfo
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- CN219198110U CN219198110U CN202223546934.4U CN202223546934U CN219198110U CN 219198110 U CN219198110 U CN 219198110U CN 202223546934 U CN202223546934 U CN 202223546934U CN 219198110 U CN219198110 U CN 219198110U
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Abstract
The utility model discloses a split type pressure control double-sealing plug, which comprises a pressure control stud and a double-sealing plug screw, wherein the pressure control stud is arranged on the plug screw; the lower section of the double-seal screw plug is a round table, and the upper section of the double-seal screw plug is an I-shaped cylinder; an O-shaped sealing ring is sleeved in a limiting groove on the outer circumference of the I-shaped cylinder; the end holes which are correspondingly blocked comprise step holes and threaded holes; the aperture of the step hole is larger than the inner diameter of the end hole, and the aperture of the threaded hole is larger than the aperture of the step hole; the height of the double-sealing screw plug is larger than that of the step hole; the small circle diameter of the round table is smaller than the inner diameter of the end hole, and the large circle diameter of the round table is the same as the diameter of the I-shaped cylinder; the I-shaped cylinder and the step hole form clearance fit, the O-shaped sealing ring and the step hole form extrusion, and the pressure control stud is in threaded connection with the threaded hole. Further, the pressure control stud is of a thread self-locking structure. The problem that the small-size end hole can only be welded and sealed is solved through double sealing.
Description
Technical Field
The utility model belongs to the technical field of plugging devices, and particularly relates to a split type pressure control double-sealing plug.
Background
In mechanical devices, there is inevitably an end hole that needs to be sealed. With the development of miniaturization of the mechanical mechanism, the pore diameter of the end hole is smaller and smaller. For the end hole to be plugged, the end hole cannot be sealed by using an end face due to the limitation of the structural size, and a welding sealing mode is often adopted.
Taking the dual-redundancy rotary transformer as an example, in a state where the dual-redundancy rotary transformer is operated, the inside of the cavity of the housing is filled with a hydraulic medium, and the hydraulic medium generates an outwardly expanding pressure. And the process hole at the top end of the outer shell of the dual-redundancy rotary transformer needs welding seams with extremely severe quality under the requirement of the sealing pressure value. The welding process control or the welding quality defect can lead to product sealing failure, so that the dual-redundancy rotary transformer and even the whole hydraulic system are failed, and the test proves that the welding sealing has limited bearing capacity and can not meet the use requirement of the high-pressure sealing environment of the current product.
It is known that the conventional sealing means cannot meet the sealing of the small-bore end hole.
Still taking a dual-redundancy rotary transformer as an example, not only is the reliability of the seal required for the process hole satisfied, but also the process hole is required to have a reliable seal in a high-pressure environment.
Disclosure of Invention
In view of the above, the utility model provides a split pressure control double-sealing plug which can have reliable sealing performance on end holes with small apertures. In addition, the bearing capacity can be controlled, and the reliable sealing performance under the high-pressure environment is ensured.
The technical scheme adopted by the utility model is as follows: a split type pressure control dual seal plug, its characterized in that: comprises a pressure control stud and a double-sealing plug screw; the lower section of the double-seal screw plug is a round table, and the upper section of the double-seal screw plug is an I-shaped cylinder; an O-shaped sealing ring is sleeved in a limiting groove on the outer circumference of the I-shaped cylinder; the end holes which are correspondingly blocked comprise step holes and threaded holes; the aperture of the step hole is larger than the inner diameter of the end hole, and the aperture of the threaded hole is larger than the aperture of the step hole; the height of the double-sealing screw plug is larger than that of the step hole; the small circle diameter of the round table is smaller than the inner diameter of the end hole, and the large circle diameter of the round table is the same as the diameter of the I-shaped cylinder; the I-shaped cylinder and the step hole form clearance fit, the O-shaped sealing ring and the step hole form extrusion, and the pressure control stud is in threaded connection with the threaded hole. Further, the pressure control stud is of a thread self-locking structure.
Further, a circular groove is formed in the lower end face of the pressure control stud, and the diameter of the circular groove is matched with the diameter of the I-shaped cylinder of the double-seal bolt.
Furthermore, the pressure control stud and the I-shaped cylinder are respectively provided with weight reducing grooves with the same size on the extrusion surface.
Further, a threaded anaerobic adhesive is coated between the pressure control stud and the threaded hole.
The beneficial effects of the utility model are as follows: the problem that the small-size end hole can only be welded and sealed is solved through double sealing. The first heavy seal is mechanical extrusion type seal, and the double seal bolt is tightly pressed by the screwed pressure control stud, so that the round table and the step hole form mechanical extrusion type seal; the second sealing is realized by sealing the hole wall of the step hole through an O-shaped sealing ring.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
FIG. 2 is a schematic illustration of one embodiment of the present utility model for plugging a dual redundancy resolver process hole.
Fig. 3 is a schematic structural view of a process hole.
In the figure: 1. the double-seal screw plug comprises a double-seal screw plug body, a round table body, an I-shaped cylinder body, a limit groove, an O-shaped seal ring, a pressure control stud, a round groove, a weight reduction groove, a process hole, a step hole, a threaded hole, a step hole, a shell body and a shell body.
Detailed Description
In order to make the technical solution of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a split pressure control double seal plug comprises a double seal bolt 1 and a pressure control stud 6. The lower section of the double sealing bolt 1 is a conical round table 2, and the upper section of the double sealing bolt 1 is an I-shaped cylinder 3. An O-shaped sealing ring 5 is sleeved in the limit groove 4 around the outer circumference of the I-shaped cylinder 3.
The corresponding plugged end hole of the present utility model should include a stepped hole 10 and a threaded hole 11.
Taking an end hole to be plugged of the dual-redundancy rotary transformer as an example, the end hole is a process hole 9 and is positioned at the upper end of an outer shell 12 of the dual-redundancy rotary transformer.
As shown in fig. 2 and 3, the upper end of the process hole 9 includes a stepped hole 10 and a threaded hole 11. The stepped bore 10 is located below and the threaded bore 11 is located above. The aperture of the step hole 10 is larger than the inner diameter of the process hole 9. The bore diameter of the threaded bore 11 is larger than the inner diameter of the stepped bore 10.
The overall height of the double seal bolt 1 is greater than the height of the stepped hole 10. The small circle diameter of the round platform 2 in the double-sealing bolt 1 is smaller than the inner diameter of the process hole 9, and the large circle diameter of the round platform 2 is the same as the diameter of the I-shaped cylinder 3. The I-shaped cylinder 3 of the double-seal bolt 1 is in clearance fit with the step hole 10, and the O-shaped sealing ring 5 on the I-shaped cylinder 3 is extruded with the step hole 10. The pressure control stud 6 is fitted with a threaded bore 11. The screwed pressure control stud 6 can press the double seal bolt 1, so that the round table 2 of the double seal bolt 1 is propped against the lower end of the stepped hole 10, and a double seal mode of mechanical extrusion seal and O-shaped seal ring 5 seal is achieved.
The pressure control stud 6 is screwed by a torque wrench with a wrench head of a corresponding shape by providing a connection port on the surface.
The lower end face of the pressure control stud 6 is provided with a circular groove 7, the diameter of the circular groove 7 is matched with the diameter of the I-shaped cylinder 3 of the double-seal bolt 1, so that the stressed bearing area of the pressure control stud 6 is ensured to be consistent with the stressed acting area of the double-seal bolt 1, and the sealing bearing capacity of the split type pressure control double-seal plug is effectively improved.
In addition, weight reducing grooves 8 with the same size are respectively arranged on the extrusion surfaces of the pressure control stud 6 and the I-shaped cylinder 3, and can be used for reducing the weight of the pressure control stud 6 and the I-shaped cylinder 3.
The double seal applied to the process hole 9 by the utility model is specifically: the first resealing is mechanical extrusion type sealing, and the double sealing bolt 1 is tightly pressed by the screwed pressure control stud 6, so that the round table 2 and the step hole 10 form mechanical extrusion type sealing. The second sealing is realized by sealing the hole wall of the stepped hole 10 through the O-shaped sealing ring 5.
From the above, the utility model solves the problem that the small-sized process hole 9 can only be welded and sealed.
The utility model can realize effective sealing pressure control on the process hole 9 through the adjustment of the pressure control stud 6, and the specific scheme is as follows:
first, the pressure control stud 6 may be provided as a threaded self-locking structure to prevent loosening of the pressure control stud 6. In addition, the pressure control stud 6 ensures the sealing bearing capacity of the split type pressure control double-sealing plug and the process hole 9 by adjusting the thread form and the effective height of the thread fit. The pressure control stud 6 and the threaded hole 11 can be coated with threaded anaerobic adhesive to further prevent loosening of the pressure control stud 6.
It should be noted that the bearing design of the threads on the pressure control stud 6 is the prior art, and will not be described in detail in the present utility model.
Claims (5)
1. A split type pressure control dual seal plug, its characterized in that: comprises a pressure control stud and a double-sealing plug screw; the lower section of the double-seal screw plug is a round table, and the upper section of the double-seal screw plug is an I-shaped cylinder; an O-shaped sealing ring is sleeved in a limiting groove on the outer circumference of the I-shaped cylinder; the end holes which are correspondingly blocked comprise step holes and threaded holes; the aperture of the step hole is larger than the inner diameter of the end hole, and the aperture of the threaded hole is larger than the aperture of the step hole; the height of the double-sealing screw plug is larger than that of the step hole; the small circle diameter of the round table is smaller than the inner diameter of the end hole, and the large circle diameter of the round table is the same as the diameter of the I-shaped cylinder; the I-shaped cylinder and the step hole form clearance fit, the O-shaped sealing ring and the step hole form extrusion, the pressure control stud is in threaded connection with the threaded hole, and the pressure control stud and the double-sealing screw plug form extrusion.
2. The split pressure control double seal plug of claim 1, wherein: the pressure control stud is of a thread self-locking structure.
3. The split pressure control double seal plug of claim 1, wherein: the lower end face of the pressure control stud is provided with a circular groove, and the diameter of the circular groove is matched with the diameter of the I-shaped cylinder of the double-seal bolt.
4. The split pressure control double seal plug of claim 1, wherein: the pressure control stud and the I-shaped cylinder are respectively provided with weight reduction grooves with the same size on the extrusion surface.
5. The split pressure control double seal plug of claim 1, wherein: and a threaded anaerobic adhesive is coated between the pressure control stud and the threaded hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223546934.4U CN219198110U (en) | 2022-12-30 | 2022-12-30 | Split type pressure control double-sealing plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223546934.4U CN219198110U (en) | 2022-12-30 | 2022-12-30 | Split type pressure control double-sealing plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219198110U true CN219198110U (en) | 2023-06-16 |
Family
ID=86707762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223546934.4U Active CN219198110U (en) | 2022-12-30 | 2022-12-30 | Split type pressure control double-sealing plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219198110U (en) |
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2022
- 2022-12-30 CN CN202223546934.4U patent/CN219198110U/en active Active
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