CN108332973B - Hole detector plug matched with shape of channel surface - Google Patents
Hole detector plug matched with shape of channel surface Download PDFInfo
- Publication number
- CN108332973B CN108332973B CN201810047285.2A CN201810047285A CN108332973B CN 108332973 B CN108332973 B CN 108332973B CN 201810047285 A CN201810047285 A CN 201810047285A CN 108332973 B CN108332973 B CN 108332973B
- Authority
- CN
- China
- Prior art keywords
- hole
- limiting
- limiting part
- shape
- plug
- 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.)
- Active
Links
- 239000000523 sample Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Connection Of Plates (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
A hole detector plug matched with the shape of a channel surface comprises a connecting base, wherein an upper hole and a lower hole are arranged on the connecting base, and the lower hole is eccentric relative to the upper hole; the plug comprises a first limiting part, a second limiting part and a lower eccentric part, wherein the first limiting part and the second limiting part are coaxial, the lower eccentric part is eccentric relative to the second limiting part, the second limiting part is in limiting fit on limiting steps of the upper hole and the lower hole, the bottom surface of the lower eccentric part is matched with the shape of the runner surface of the casing, and the lower eccentric part is in positioning fit in the lower hole; the connecting body is provided with a connecting end which is connected with the connecting base in a screwing way; the connecting end is provided with a limiting hole cavity structure so as to limit and assemble a first limiting part, and the first limiting part is in clearance fit in the limiting hole cavity structure so as to enable the connecting body to rotate relative to the first limiting part. The plug has a simple and compact integral structure, can effectively realize the matching with the surface shape of the runner, avoids the loss and the non-uniformity of the flow field, avoids the occurrence of turbulent flow phenomenon, can be assembled in a vertical installation mode, and ensures the simplicity and the practicability of the assembly.
Description
Technical Field
The invention belongs to the technical field of hole detector checking plugging structures of gas turbines, and particularly relates to a hole detector plug for matching a flow path surface of a gas turbine casing.
Background
At present, because the flow passage surface of the gas turbine casing is a convergent annular surface with irregular shape, if the airborne hole detector plug for maintenance and inspection is arranged on the flow passage wall of the casing in a vertical installation mode which is easy to operate, and the limit of the structure of the plug is added, an inward concave step is formed between the flow passage surface and the bottom end surface of the plug, and the existence of the inward concave step tends to cause loss and non-uniformity of a flow field and form turbulence to a certain extent.
Disclosure of Invention
The invention aims to solve the technical problem of providing the hole detector plug matched with the shape of the surface of the flow channel, which has a simple and compact integral structure, can effectively realize the matching with the shape of the surface of the flow channel, avoids the loss and the non-uniformity of the flow field, avoids the turbulence phenomenon, can still be assembled in a vertical installation mode, and ensures the simplicity and the practicability of the assembly.
In order to solve the technical problems, the hole detector plug matched with the shape of the channel surface comprises:
a connecting base, the bottom surface of which is attached to a part of the channel surface of the casing and is provided with an upper hole and a lower hole which are communicated, wherein the lower hole is eccentrically arranged relative to the upper hole;
the plug comprises a first limiting part, a second limiting part and a lower eccentric part which are connected up and down, wherein the first limiting part and the second limiting part are coaxially arranged, the lower eccentric part is eccentrically arranged relative to the second limiting part, the second limiting part is used for being in limiting fit on a limiting step at the joint of an upper hole and a lower hole, the bottom surface of the lower eccentric part is matched with the shape of a corresponding casing flow path surface, and the lower eccentric part is used for being in positioning fit in the lower hole;
the connecting body is provided with a connecting end which is in screwed connection with the connecting base;
the connecting end is provided with a limiting hole cavity structure so as to limit and assemble a first limiting part, and the first limiting part is in clearance fit in the limiting hole cavity structure so as to enable the connecting body to rotate relative to the first limiting part.
In some embodiments, the spacing bore structure includes an annular fitting groove provided on the bore wall, a resilient collar that is snap-fittable into the annular fitting groove, a shoulder provided on the first spacing portion that is retained on the resilient collar to prevent the first spacing portion from exiting the bore.
Further, the shoulder is formed by an annular groove formed in the first limiting portion, and the lower portion of the annular groove extends to the second limiting portion.
In some embodiments, the connection end and the connection base mate with threads to achieve a screw-in connection.
Further, an external thread is arranged on the outer side wall of the connecting end, and an internal thread is arranged on the upper portion of the upper hole of the connecting base so as to be in screwed connection with the external thread.
In some embodiments, a locking wire hole is provided in the connection base above the connection end for connection with a gas turbine related component.
In some embodiments, a gap is reserved between the first limiting portion and the top of the bore.
The hole detector plug matched with the shape of the channel surface is arranged on the connecting base, the plug and the connecting body, and the eccentric lower hole and the eccentric lower part are arranged on the connecting base and the plug, so that the plug can be well positioned on the connecting base, and the bottom surface matched with the shape of the channel surface of the corresponding casing is arranged on the eccentric lower part, thereby avoiding the formation of concave steps, avoiding the loss and the non-uniformity of a flow field and preventing the formation of turbulent flow. And during assembly, the first limiting part is arranged on the plug, and the connecting body is provided with the limiting hole cavity structure to limit the first limiting part, so that the assembly of the plug and the connecting body is realized, and after the assembly, the connecting body can rotate relative to the first limiting part, so that the screwing connection between the connecting body and the connecting base is not influenced. In addition, the hole detector plug matched with the shape of the channel surface has few integral parts and simple integral structure, and can be realized through simple mechanical processing.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate and provide a further understanding of the disclosure, are incorporated in and constitute a part of this application and are intended to illustrate and not to limit the invention in any way.
FIG. 1 is a schematic cross-sectional view of one embodiment of a borehole sonde plug according to the present invention matching the shape of the face of a passageway.
FIG. 2 is a schematic illustration of an exploded view of one embodiment of a hole finder plug matching the shape of the channel face.
Fig. 3 is a schematic cross-sectional structure of the connection base in fig. 2.
The drawings of the invention are as follows:
the locking device comprises a connecting base 1, a base 1.1, an upper hole 2, a lower hole 3, a plug 4, a first limiting part 5, a second limiting part 6, a lower eccentric part 7, a limiting step 8, a connecting body 9, a head 9.1, a connecting end 10, a cavity 11, an annular fitting groove 12, an elastic clamping ring 13, a shoulder 14, an annular groove 15 and a locking screw hole 16.
Detailed Description
The inventive concepts of the present disclosure will be described below using terms commonly used by those skilled in the art. These inventive concepts may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of their inclusion to those skilled in the art. It should also be noted that these embodiments are not mutually exclusive. A component, step or element from one embodiment may be conceived that may be present or utilized in another embodiment. The particular embodiments shown and described may be replaced with a wide variety of alternative and/or equivalent implementations without departing from the scope of the embodiments of the present disclosure. This application is intended to cover any adaptations or variations of the embodiments discussed herein.
The phrases "in some embodiments," "in one embodiment," and the like in the following may or may not refer to the same embodiment. Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms, these terms should be used merely to distinguish the elements from each other. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present application.
The invention relates to a hole detector plug matched with the shape of a channel surface, which has the following technical scheme that the hole detector plug comprises a connecting base 1, a plug 4 and a connecting body 9.
Wherein the bottom surface of the connection base 1 is attached to a part of the flow path surface of the casing, the connection base 1 is further provided with an upper hole 2 and a lower hole 3 which are penetrated, and the lower hole 3 is eccentrically arranged relative to the upper hole 2. Wherein the upper hole 2 penetrates through the top of the connection base 1, and the lower hole 3 penetrates through the bottom of the connection base 1, and the upper hole 2 and the lower hole 3 communicate up and down.
The plug 4 comprises a first limiting part 5, a second limiting part 6 and a lower eccentric part 7 which are connected up and down, wherein the first limiting part 5 and the second limiting part 6 are coaxially arranged, and the lower eccentric part 7 is eccentrically arranged relative to the second limiting part 6. And the second limiting part 6 is used for limiting and being assembled on a limiting step 8 at the joint of the upper hole 2 and the lower hole 3, the limiting step 8 is formed by different apertures of the upper hole 2 and the lower hole 3, and the aperture of the upper hole 2 is larger than the aperture of the lower hole 3 for limiting the second limiting part 6. To prevent the occurrence of concave stepped surfaces, the bottom surface of the lower eccentric portion 7 is matched with the shape of the corresponding casing flow path surface. Meanwhile, the lower eccentric part 7 is used for being positioned and assembled in the lower hole 3, and in order to realize assembly positioning, the eccentric distance and the eccentric direction of the lower eccentric part 7 are matched with those of the lower hole 3 relative to the upper hole 2.
The connection body 9 is provided with a connection end 10 screwed with the connection base 1.
In order to realize the assembly of the plug and the connector 9, the connecting end 10 is provided with a limiting hole cavity structure to limit and assemble the first limiting part 5, and the first limiting part 5 is in clearance fit in the limiting hole cavity structure to enable the connector 9 to rotate relative to the first limiting part 5.
FIG. 1 is a schematic cross-sectional view of one embodiment of a borehole sonde plug according to the present invention matching the shape of the face of a passageway. In this embodiment, the connection base 1 is attached to the casing, the bottom surface of the connection base 1 is a part of the flow surface of the casing, and the connection base 1 may be formed separately or integrally with the casing, depending on the need. The surface of the connection base 1 protrudes upward from the cylindrical base 1.1, and of course, the shape of the base 1.1 is not limited to a cylindrical shape, and the peripheral shape is not limited, and may be a rectangular, square, conical, or other suitable shape. In this embodiment, the cylindrical seat body 1.1 is provided with an upper hole 2 and a lower hole 3, the lower hole 3 is eccentric a distance relative to the upper hole 2, the upper hole 2 and the lower hole 3 are both provided with circular through holes, the upper hole 2 is larger than the aperture of the lower hole 3, and meanwhile, the middle upper part of the upper hole 2 is provided with internal threads. The shape of the lower hole 3 is not limited except for a circular through hole, and various other shapes can be provided.
For the plug 4, in the embodiment shown in fig. 1, the first limiting portion 5, the second limiting portion 6, and the lower eccentric portion 7 of the plug 4 are all cylindrical, and of course, the lower eccentric portion 7 may be cooperatively disposed according to the shape of the lower hole 3.
The first limiting part 5 and the second limiting part 6 are coaxially arranged, that is, the first limiting part and the second limiting part are not eccentric relatively. The lower eccentric part 7 is eccentric a distance relative to the second limiting part 6, wherein the eccentric distance and the eccentric direction of the lower eccentric part 7 relative to the second limiting part 6 are matched with the eccentric distance and the eccentric direction of the lower hole 3 relative to the upper hole 2.
In the embodiment shown in fig. 1, the connecting body 9 has a T-shaped cross section, and a cylindrical connecting end 10 and a head 9.1 connected to the top of the connecting end 10 are provided. The head 9.1 is preferably provided as an external hexagonal head for easy handling of the wrench, although the shape of the periphery of the head may not be limited to the external hexagonal head, and may be provided in a desired shape according to the requirements. Meanwhile, in this embodiment, the outer hexagonal head is larger than the size of the connecting end 10, and the outer side wall of the connecting end 10 is provided with an external thread to be screwed with the internal thread of the upper hole 2. The connection terminal 10 is further provided with a cavity 11, a lower end of the cavity 11 penetrates through a bottom of the connection terminal 10, and an annular fitting groove 12 is provided on an inner wall of the cavity 11. While the first limiting part 5 of the plug 4 is in limiting fit in the cavity 11.
In this embodiment, the limiting cavity structure comprises an annular fitting groove 12 formed on the wall of the cavity 11, a resilient collar 13 capable of being clamped in the annular fitting groove 12, and a shoulder 14 arranged on the first limiting portion 5, wherein the shoulder 14 is limited on the resilient collar 13 to prevent the first limiting portion 5 from falling out of the cavity 11. Through the cooperation setting of elastic collar 13 and circular bead 14, not only can be convenient for the assembly of end cap and connector, can also effectively ensure simultaneously that first spacing portion 5 is spacing in bore 11 and not drop, and first spacing portion 5 and bore 11 clearance fit can realize the rotation of the relative first spacing portion of connector, and realizes the screw thread between connector and the connection base and revolve and close the connection. Meanwhile, in the actual screwing process, the length of the threaded fit between the connecting body and the connecting base is smaller than the length of the fit between the eccentric part under the plug and the lower hole of the connecting base, so that the plug of the hole detector extends into the lower hole for installation and guiding before screwing, and the assembly manufacturability is enhanced.
In some embodiments, the shoulder 14 is formed by an annular groove 15 provided on the first limit stop 5, the lower portion of the annular groove 15 extending to the second limit stop 6. The vertical span of the annular groove 15 is large, and the connector is easier to rotate relative to the first limiting part. See figure 1 for details.
In some embodiments, a locking wire hole 16 is provided in the connection base 1 above the connection end 10 to connect with a gas turbine related component. Reliable loosening is achieved after the fuse is passed through the locking wire aperture 16 to connect the connector to a gas turbine related component.
In some embodiments, a gap is reserved between the first limiting portion 5 and the top of the cavity 11, that is, the first limiting portion 5 is not tightly attached to the top of the cavity 11, so that the limit plug can move slightly after the hole detector plug is installed, and deformation constraint possibly generated under different temperature changes is prevented.
The assembly process comprises the following steps: the plug is limited on the connecting body through the elastic clamping ring to form an assembly body, the assembly body is axially installed along the inner thread of the connecting base, the lower eccentric part of the plug firstly enters the lower hole of the connecting base, the outer thread of the connecting body is screwed into the inner thread of the connecting base, and finally the connecting body is screwed into the connecting base until the end face of the connecting body is tightly attached to the end face of the connecting base, and then the assembly of the hole detector plug is completed.
Claims (7)
1. The utility model provides a hole probe end cap with runner face shape assorted which characterized in that:
comprises a connecting base (1), wherein the bottom surface of the connecting base is attached to a part of the channel surface of the casing, and is provided with an upper hole (2) and a lower hole (3) which are communicated, and the lower hole (3) is eccentrically arranged relative to the upper hole (2);
the plug (4) comprises a first limiting part (5), a second limiting part (6) and a lower eccentric part (7) which are connected up and down, wherein the first limiting part (5) and the second limiting part (6) are coaxially arranged, the lower eccentric part (7) is eccentrically arranged relative to the second limiting part (6), the second limiting part (6) is used for being in limiting fit on a limiting step (8) at the joint of the upper hole (2) and the lower hole (3), the bottom surface of the lower eccentric part (7) is matched with the shape of the corresponding casing flow path surface, and the lower eccentric part (7) is used for being in positioning fit in the lower hole (3);
the connecting body (9) is provided with a connecting end (10) which is connected with the connecting base (1) in a screwing way;
the connecting end (10) is provided with a limiting hole cavity structure so as to limit and assemble the first limiting part (5), and the first limiting part (5) is in clearance fit in the limiting hole cavity structure so as to enable the connecting body (9) to rotate relative to the first limiting part (5).
2. The borehole sonde plug matching the shape of a flow surface of claim 1, wherein: the limiting hole cavity structure comprises an annular fitting groove (12) arranged on the wall of the hole cavity (11), an elastic clamping ring (13) capable of being clamped in the annular fitting groove (12), and a shoulder (14) arranged on the first limiting part (5), wherein the shoulder (14) is limited on the elastic clamping ring (13) to prevent the first limiting part (5) from falling out of the hole cavity (11).
3. The borehole sonde plug matching the shape of a flow surface as recited in claim 2, wherein: the shoulder (14) is formed by an annular groove (15) formed in the first limiting portion (5), and the lower portion of the annular groove (15) extends to the second limiting portion (6).
4. The borehole sonde plug matching the shape of a flow surface of claim 1, wherein: the connecting end (10) and the connecting base (1) are mutually matched with threads to realize screwing connection.
5. The borehole sonde plug matching the shape of a flow surface as recited in claim 4, wherein: the outer side wall of the connecting end (10) is provided with external threads, and the upper part of the upper hole (2) of the connecting base (1) is provided with internal threads so as to be connected with the external threads in a screwing mode.
6. The borehole sonde plug matching the shape of a flow surface of claim 1, wherein: a locking screw hole (16) is arranged on the connecting base (1) above the connecting end (10) so as to be connected with related parts of the gas turbine.
7. The borehole sonde plug matching the shape of a flow surface of claim 1, wherein: a gap is reserved between the first limiting part (5) and the top of the hole cavity (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810047285.2A CN108332973B (en) | 2018-01-18 | 2018-01-18 | Hole detector plug matched with shape of channel surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810047285.2A CN108332973B (en) | 2018-01-18 | 2018-01-18 | Hole detector plug matched with shape of channel surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108332973A CN108332973A (en) | 2018-07-27 |
| CN108332973B true CN108332973B (en) | 2024-01-12 |
Family
ID=62925234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810047285.2A Active CN108332973B (en) | 2018-01-18 | 2018-01-18 | Hole detector plug matched with shape of channel surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108332973B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065996B (en) * | 2020-10-19 | 2022-04-01 | 中国航发沈阳发动机研究所 | Hole detector plug device and hole detector plug assembly and disassembly tools |
| CN115046420A (en) * | 2022-06-15 | 2022-09-13 | 森松（江苏）重工有限公司 | Heat exchange tube shutoff frock |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19850752A1 (en) * | 1998-11-04 | 2000-05-11 | Wankel Rotary Gmbh | Rotary piston compressor in hypotrochoidal format has outer runner meshing with inner running slidingly located on eccentric whose eccentric axis is eccentrically arranged by defined value to rotary axis of outer runner |
| CN2378100Y (en) * | 1999-06-18 | 2000-05-17 | 吐哈石油勘探开发指挥部钻采工艺研究院 | Eccentric gas separator |
| CN102235501A (en) * | 2010-05-05 | 2011-11-09 | 中国航空工业集团公司沈阳发动机设计研究所 | A channel sealing device that can be disassembled repeatedly |
| CN204027829U (en) * | 2014-08-17 | 2014-12-17 | 中国航空工业集团公司沈阳发动机设计研究所 | A split type hole finder plug |
| CN204255647U (en) * | 2014-08-25 | 2015-04-08 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of borescope stopper structure for the shutoff of casing hole |
| CN204286796U (en) * | 2014-12-01 | 2015-04-22 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of non-bolt assembled borescope finder |
| CN206513442U (en) * | 2017-02-10 | 2017-09-22 | 中国航发沈阳发动机研究所 | A kind of borescope hole plugging structure |
| CN207662628U (en) * | 2018-01-18 | 2018-07-27 | 浙江华擎航空发动机科技有限公司 | A kind of borescope plug |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3006373B1 (en) * | 2013-05-31 | 2015-05-22 | Snecma | TURBOMACHINE HOUSING HAVING ENDOSCOPIC ORIFICE |
-
2018
- 2018-01-18 CN CN201810047285.2A patent/CN108332973B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19850752A1 (en) * | 1998-11-04 | 2000-05-11 | Wankel Rotary Gmbh | Rotary piston compressor in hypotrochoidal format has outer runner meshing with inner running slidingly located on eccentric whose eccentric axis is eccentrically arranged by defined value to rotary axis of outer runner |
| CN2378100Y (en) * | 1999-06-18 | 2000-05-17 | 吐哈石油勘探开发指挥部钻采工艺研究院 | Eccentric gas separator |
| CN102235501A (en) * | 2010-05-05 | 2011-11-09 | 中国航空工业集团公司沈阳发动机设计研究所 | A channel sealing device that can be disassembled repeatedly |
| CN204027829U (en) * | 2014-08-17 | 2014-12-17 | 中国航空工业集团公司沈阳发动机设计研究所 | A split type hole finder plug |
| CN204255647U (en) * | 2014-08-25 | 2015-04-08 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of borescope stopper structure for the shutoff of casing hole |
| CN204286796U (en) * | 2014-12-01 | 2015-04-22 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of non-bolt assembled borescope finder |
| CN206513442U (en) * | 2017-02-10 | 2017-09-22 | 中国航发沈阳发动机研究所 | A kind of borescope hole plugging structure |
| CN207662628U (en) * | 2018-01-18 | 2018-07-27 | 浙江华擎航空发动机科技有限公司 | A kind of borescope plug |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108332973A (en) | 2018-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6258315B2 (en) | Bolt type valve control element | |
| CN110186686B (en) | A hole detector plug assembly | |
| CN108332973B (en) | Hole detector plug matched with shape of channel surface | |
| CN204255647U (en) | A kind of borescope stopper structure for the shutoff of casing hole | |
| CN204027829U (en) | A split type hole finder plug | |
| CN112065996B (en) | Hole detector plug device and hole detector plug assembly and disassembly tools | |
| CN209549738U (en) | Nozzle assembly and mine spray equipment with nozzle assembly | |
| CN206636911U (en) | An improved bolt | |
| CN100491800C (en) | Adaptive intermediate rings for screw-on parts in quick-connect systems for fluid lines | |
| CN203926972U (en) | A kind of differential pressure control valve | |
| CN111043626B (en) | Nozzle, combustion chamber and gas turbine | |
| CN105972361A (en) | High-pressure quick coupling for liquid | |
| US20240376697A1 (en) | Systems and methods for coupling of a tub spout | |
| CN106104021A (en) | Stop bolt, fixing structure, fixing method and sealing structure | |
| CN207662628U (en) | A kind of borescope plug | |
| CN207634741U (en) | Voltage stabilizing balancing device and multistage pump with it | |
| CN215214893U (en) | Online sealing performance measurement sealing plug of small-caliber nuclear-grade check valve | |
| CN203770309U (en) | Plug for fixing tarpaulin and tower drum | |
| CN214367185U (en) | Impeller lock nut | |
| CN109611615B (en) | Adjustable sealing structure | |
| KR101975449B1 (en) | Combining structure between distributor and valve | |
| CN115356112B (en) | A plug structure suitable for aircraft engine observation window and its disassembly and assembly method | |
| CN206513111U (en) | A kind of assembly type building safety guardrail | |
| CN214199949U (en) | Detection tool for detecting cone angle of inner taper hole | |
| CN211058794U (en) | Energy signal transmission device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |