CN113884289A - End part restraint device for deep water steel catenary riser contact section test platform - Google Patents
End part restraint device for deep water steel catenary riser contact section test platform Download PDFInfo
- Publication number
- CN113884289A CN113884289A CN202111133524.4A CN202111133524A CN113884289A CN 113884289 A CN113884289 A CN 113884289A CN 202111133524 A CN202111133524 A CN 202111133524A CN 113884289 A CN113884289 A CN 113884289A
- Authority
- CN
- China
- Prior art keywords
- arc
- block
- clamping
- mounting
- shaped
- 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.)
- Granted
Links
Images
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
- G01M13/00—Testing of machine parts
Abstract
The embodiment of the invention discloses an end part restraint device for a deepwater steel catenary riser contact section test platform, which comprises an installation frame, an installation block and a fixture block, wherein the fixture block is rotatably connected to the installation block along the circumferential direction, and an installation flange is arranged on one side of the fixture block, which is far away from the installation block; the mounting block is connected with the inner wall of the mounting frame through a plurality of linear springs, and the axial directions of at least two linear springs are different; a plurality of sections of arc-shaped slotted holes are formed in the end face, used for mounting the clamping block, of the mounting block along the circumferential direction, bending springs with elastic directions identical to the extending directions of the arc-shaped slotted holes are detachably embedded in the arc-shaped slotted holes, one end of each bending spring abuts against one end face of each arc-shaped slotted hole, and the other end of each bending spring abuts against the side face, located in each arc-shaped slotted hole, of the clamping block. Through the arrangement, the specificity adjustment can be carried out on different stand pipes, the pertinence simulation is effectively realized, the difference between the simulation result and the actual result is greatly reduced, and the accuracy is improved.
Description
Technical Field
The embodiment of the invention relates to the field of offshore oil and gas development steel catenary riser experiment devices, in particular to an end part restraint device for a deepwater steel catenary riser touch zone test platform.
Background
With the increasing demand for energy in various countries, people have looked at marine oil and gas resources since the beginning of the last century. As a key ring for ocean oil and gas resource development, the related research aiming at the steel catenary riser in China is still in the starting stage. Due to the complex marine environment, the steel catenary riser is likely to be damaged in the links of installation, service and the like, severe environmental disasters and huge economic losses are caused, and therefore the problems related to stress of the steel catenary riser and the like need to be solved, and the development of related tests on the deepwater steel catenary riser is significant.
In the test process, in order to research the actual motion and stress state of the stand pipe, the stand pipe needs to move in multiple degrees of freedom. However, the contact section of the steel catenary riser is long, and the riser is necessarily cut off during the test, so that the riser constraint at the cut-off position needs to be simulated to better meet the actual requirement and ensure the accuracy of the test result.
Disclosure of Invention
Therefore, the embodiment of the invention provides an end part constraint device for a deep-water steel catenary riser contact zone test platform, which simulates constraint on multidirectional freedom degrees by adopting a mode of combining a linear spring and a bending spring, and performs targeted adjustment according to different contact zone lengths and material characteristics, so that specific adjustment of different risers is realized, targeted simulation is effectively realized, the difference between a simulation result and an actual result is greatly reduced, and the accuracy is improved.
In order to achieve the above object, an embodiment of the present invention provides the following:
the embodiment of the invention provides an end part restraint device for a deepwater steel catenary riser contact section test platform, which comprises an installation frame, an installation block arranged in the installation frame, and a fixture block rotatably connected to the installation block along the circumferential direction, wherein one side of the fixture block, which is far away from the installation block, is provided with an installation flange for connecting the end part of the deepwater steel catenary riser; wherein the content of the first and second substances,
the mounting block is connected with the inner wall of the mounting frame through a plurality of linear springs, and the axial directions of at least two linear springs are different;
a plurality of sections of arc-shaped slotted holes are formed in the end face, used for mounting the fixture block, of the mounting block along the circumferential direction, bending springs with elastic directions identical to the extending directions of the arc-shaped slotted holes are detachably embedded in the arc-shaped slotted holes, one end of each bending spring abuts against one end face of each arc-shaped slotted hole, and the other end of each bending spring abuts against the side face, located in each arc-shaped slotted hole, of the fixture block.
As a preferable scheme of the present invention, the mounting frame includes a back plate located on a side of the mounting block away from the fixture block, and side plates extending from two ends of the back plate along an axial direction of the mounting flange; and the number of the first and second electrodes,
the back plate and the two side plates are respectively connected with the mounting block through linear springs, and the axes of the linear springs are parallel to or perpendicular to the axis of the mounting flange.
As a preferable scheme of the present invention, the mounting block includes a connecting portion and a clamping portion, which are sequentially and coaxially disposed from a side close to the back plate, the connecting portion is formed in a square structure, and the clamping portion is formed in a disc structure; and the number of the first and second electrodes,
the linear spring is connected to the connecting part;
the end face, deviating from the connecting portion, of the clamping portion is provided with the arc-shaped slotted hole.
As a preferred scheme of the invention, the clamping block comprises a clamping section for clamping in the arc-shaped slotted hole and an installation section formed by extending from the clamping section away from the installation block, and the installation flange is arranged on the installation section; wherein the content of the first and second substances,
the clamping section comprises clamping plates which are oppositely arranged and form a gap, two clamping plates are provided with embedding grooves on opposite side surfaces, the end surface of one side, close to the central axis of each clamping block, of each arc-shaped groove hole protrudes outwards along the radial direction to form an arc-shaped clamping protrusion, and the embedding grooves are embedded in the arc-shaped clamping protrusions.
As a preferred scheme of the invention, the end surface of the mounting block with the arc-shaped slotted hole is inwards recessed along the radial direction to form an accommodating cavity, a group of opposite arc-shaped convex plates are arranged in the accommodating cavity, and the two arc-shaped convex plates are connected through a telescopic piece, so that the two arc-shaped convex plates can be close to or far away from each other, and the two arc-shaped convex plates can move along the radial direction to the end parts which are positioned in the arc-shaped slotted hole and form the arc-shaped clamping protrusions;
the end face of the arc-shaped convex plate is concavely provided with a plurality of clamping grooves used for clamping the embedding grooves.
As a preferable mode of the present invention, the expansion member includes a rotary pipe rotatably disposed in the accommodation chamber, and an inner wall of the rotary pipe is formed as an internal thread, a set of external threaded pipes screwed into the rotary pipe, and a guide bar disposed in the accommodation chamber for restricting rotation of the external threaded pipes, and each of the two external threaded pipes extends from one end of the rotary pipe to a portion located outside the external threaded pipe, and two arc-shaped convex plates are respectively connected to one of the external threaded pipes.
In a preferred embodiment of the present invention, the external threads on the two external threaded pipes have opposite spiral directions.
The embodiment of the invention has the following advantages:
1. the end part constraint device provided by the invention can provide constraint of multidirectional freedom degrees, and better simulates actual constraint borne by a test pipe fitting;
2. when different test pipe fittings are replaced, the change simulation of the restraint of the end part can be realized by adjusting the characteristics of the linear spring, the bending spring, such as rigidity, length and the like, the pertinence simulation of different test pipe fittings can be better realized, the accuracy is improved, the whole replacement is relatively simple, and the operation can be conveniently carried out;
3. when the overall test conditions, purposes and the like are changed, the end part restraining device can be integrally adjusted or replaced, so that the convenient replacement and adjustment in the actual test operation process are facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a schematic view of an end restraint according to an embodiment of the present invention;
FIG. 2 is a front view of an end restraint provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of a portion of an end restraint according to an embodiment of the present invention;
fig. 4 is a schematic partial structural view of a mounting block and a clamping block according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of one of the clamping segments according to the embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a mounting flange provided in accordance with an embodiment of the present invention;
fig. 7 is a schematic view of a partial internal structure of the clamping portion according to an embodiment of the present invention.
In the figure:
1-a concrete platform; 2-test the pipe fitting; 3-a bottom plate; 4-a bolt; 5-pipe flange; 6-mounting a flange; 7-mounting a block; 8-a fixture block; 9-a linear spring; 10-a bending spring; 11-a back plate; 12-side plates; 13-a connecting part; 14-a clamping part; 15-arc slotted hole; 16-a clamping section; 17-a mounting section;
141-arc convex plate; 142-a card slot; 143-rotating the tube; 144-an externally threaded tube; 145-conducting bars;
161-clamping plate; 162-fitting groove.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following is further illustrated by specific examples.
As shown in fig. 1-7, the present invention provides an end restraint for a deep water steel catenary riser touch zone test platform that is removably attachable to a concrete platform 1 to facilitate replacement and adjustment of the end restraint. For example, in a preferred embodiment, the entire end restraint may be removably positioned relative to the concrete platform 1 by mounting the end restraint to the base plate 3 and further removably mounting the base plate 3 and the concrete platform 1 via the bolts 4.
Further, this tip restraint device includes the installing frame of constituteing through backplate 11 and the cooperation of curb plate 12, the installation piece 7 that is connected through linear spring 9 and the inner wall of installing frame to and the fixture block 8 of joint on installation piece 7, and keep away from one side of installation piece 7 in the fixture block 8 and be provided with mounting flange 6, mounting flange 6 is used for being connected in order to realize the location installation of experimental pipe fitting 2 with the pipe fitting flange 5 of experimental pipe fitting 2 tip. Meanwhile, a multi-section arc-shaped slot 15 is formed in the end face of the mounting block 7 for mounting the fixture block 8 along the circumferential direction, a bending spring 10 with the elastic direction the same as the extending direction of the arc-shaped slot 15 is detachably embedded in the arc-shaped slot 15, one end of the bending spring 10 abuts against one end face of the arc-shaped slot 15, and the other end abuts against the side face of the fixture block 8 in the arc-shaped slot 15. Of course, the mounting flange 6 and the pipe fitting flange 5 can be connected by bolts 4. It is further noted that the mounting block 7 formed with the arcuate slot 15 provides torsional rigidity.
In a more preferred embodiment, the linear spring 9 and the curved spring 10 are both detachably arranged, so that they can be better selected with regard to the stiffness of the spring according to experimental requirements. The detachable arrangement of the linear spring 9 and the curved spring 10 can be in any suitable manner, for example, by means of a steel plate detachably mounted in the mounting frame and the arc-shaped slot 15, the springs can be welded to the steel plate, and the steel plate can be detachably mounted in the mounting frame and the arc-shaped slot 15 by means of screws or the like.
In order to better improve the stability of the whole structure, the structure of the partial mounting block 7 formed with the arc-shaped slot 15 can be further defined as follows: the two arc-shaped slotted holes 15 are symmetrically arranged at the midpoint of the mounting block 7, one end of the bending spring 10 is connected to one end wall of the arc-shaped slotted hole 19, and the other end is connected to the fixture block 8. Of course, the connection mode can be further selected to be welding.
Meanwhile, further, in order to enable the clamping block 8 to be clamped better, and the length of the bending spring 10 can be adjusted according to actual conditions so as to adjust the torque force, the end surface of the mounting block 10 with the arc-shaped slot hole 15 is recessed inwards along the radial direction to form an accommodating cavity, a group of opposite arc-shaped convex plates 141 are arranged in the accommodating cavity, the two arc-shaped convex plates 141 are connected through a telescopic piece, so that the two arc-shaped convex plates 141 can be close to or far away from each other, and the two arc-shaped convex plates 141 can move along the radial direction until the end parts are positioned in the arc-shaped slot hole 15 and form an arc-shaped clamping protrusion; a plurality of engaging grooves 142 for engaging with the engaging grooves 162 are formed in the end surface of the arc-shaped projection plate 141. The telescopic member comprises a rotating pipe 143 which is rotatably arranged in the accommodating cavity, the inner wall of the rotating pipe is formed into internal threads, a group of external threaded pipes 144 which are screwed in the rotating pipe 143, and a guide bar 145 which is arranged in the accommodating cavity and used for limiting the rotation of the external threaded pipes 144, wherein the two external threaded pipes 144 respectively extend from one end of the rotating pipe 143 to be partially positioned outside the external threaded pipes 144, and the two arc-shaped convex plates 141 are respectively connected to one external threaded pipe 144. The external threads on the two externally threaded pipes 144 are oppositely threaded. Of course, the end surface provided with the telescopic element may be formed to be open, and the mounting section 17 may be connected to the clamping section 16 with a certain gap, so as to facilitate the rotational adjustment of the rotating tube 143. Above-mentioned mode of setting can be at the in-process of adjustment, through rotating the rotating pipe 143, holds the chamber with arc flange 141 income, when cardboard 161 adjusts to suitable position, then the antiport rotating pipe 143, arc flange 141 at least part removes to holding the chamber outside, realizes the location block effectively through the cooperation of draw-in groove 142 with fixture block 8. Also, the length of the bending spring 10 can be adjusted by providing a plurality of catching grooves 142.
In the test process, the test pipe fitting 2 floats on the soil body, and the movement displacement of the end part constraint end of the test pipe fitting 2 is small through numerical calculation, so that the spring with strong rigidity is selected to be enough to constrain the test pipe fitting. The eight springs connected to the mounting block 7 limit the axial, radial, vertical displacement of the test tube 2 and the radial and vertical rotation around the test tube 2. When the test tube 2 is rotated in the axial direction, the bending spring 10 in the snap-in portion 14 is either stretched or compressed, thereby restraining the test tube 2 from twisting in that direction. When different test tubes 2 or different problems are studied, the linear spring 9 and/or the curved spring 10 can be replaced, or the upper end restraint can be removed or replaced in its entirety to match the new test object.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (7)
1. The end part restraint device for the deepwater steel catenary riser contact section test platform is characterized by comprising a mounting frame, a mounting block (7) arranged in the mounting frame, and a clamping block (8) rotatably connected to the mounting block (7) along the circumferential direction, wherein one side, far away from the mounting block (7), of the clamping block (8) is provided with a mounting flange (6) used for connecting the end part of the deepwater steel catenary riser; wherein the content of the first and second substances,
the mounting block (7) is connected with the inner wall of the mounting frame through a plurality of linear springs (9), and the axial directions of at least two linear springs (9) are different;
a multi-section arc-shaped slotted hole (15) is formed in the end face, used for installing the clamping block (8), of the installation block (7) along the circumferential direction, a bending spring (10) with the elastic direction being the same as the extending direction of the arc-shaped slotted hole (15) is detachably embedded in the arc-shaped slotted hole (15), one end of the bending spring (10) abuts against one end face of the arc-shaped slotted hole (15), and the other end of the bending spring abuts against the side face, located in the arc-shaped slotted hole (15), of the clamping block (8).
2. An end constraint device according to claim 1 characterised in that the mounting frame comprises a back plate (11) on the side of the mounting block (7) facing away from the latch block (8), and side plates (12) extending from both ends of the back plate (11) in the direction of the axis of the mounting flange (6); and the number of the first and second electrodes,
the back plate (11) and the two side plates (12) are respectively connected with the mounting block (7) through linear springs (9), and the axes of the linear springs (9) are parallel to or perpendicular to the axis of the mounting flange (6).
3. An end constraint device according to claim 2, characterised in that the mounting block (7) comprises a connecting part (13) and a clamping part (14) which are arranged in sequence and coaxially from the side close to the back plate (11), the connecting part (13) is formed into a square structure, and the clamping part (14) is formed into a disc structure; and the number of the first and second electrodes,
the linear spring (9) is connected to the connecting part (13);
the end face, deviating from the connecting portion (13), of the clamping portion (14) is provided with the arc-shaped slotted hole (15).
4. An end constraint device according to any of claims 1-3, characterized in that the clip (8) comprises a clip section (16) for clipping into the arc-shaped slot (15), and a mounting section (17) formed by extending from the clip section (16) away from the mounting block (7), the mounting flange (6) is arranged on the mounting section (17); wherein the content of the first and second substances,
the clamping section (16) comprises clamping plates (161) which are oppositely arranged and form gaps, two clamping plates (161) are provided with embedding grooves (162) on opposite side faces, the end face, close to the fixture block (8), of one side, close to the central axis of the fixture block (8), of the arc-shaped slotted hole (15) protrudes outwards along the radial direction to form an arc-shaped clamping protrusion, and the embedding grooves (162) are embedded in the arc-shaped clamping protrusion.
5. An end constraint device according to claim 4, characterized in that the end surface of the mounting block (7) formed with the arc-shaped slot (15) is recessed inwards along the radial direction to form a containing cavity, a set of opposite arc-shaped convex plates (141) is arranged in the containing cavity, and the two arc-shaped convex plates (141) are connected through a telescopic piece, so that the two arc-shaped convex plates (141) can approach or move away from each other, and the two arc-shaped convex plates (141) can move along the radial direction until the end part is positioned in the arc-shaped slot (15) and is formed into the arc-shaped clamping convex;
the end face of the arc-shaped convex plate (141) is concavely provided with a plurality of clamping grooves (142) for clamping the embedding grooves (162).
6. An end constraint device according to claim 5 characterised in that the telescopic member comprises a rotary tube (143) with an internal thread formed on its inner wall and rotatably arranged in the housing cavity, a set of external threaded tubes (144) screwed into the rotary tube (143), and a guide bar (145) arranged in the housing cavity for limiting the rotation of the external threaded tubes (144), and the two external threaded tubes (144) extend from one end of the rotary tube (143) to a position partially outside the external threaded tubes (144), and two arc-shaped convex plates (141) are respectively connected to one of the external threaded tubes (144).
7. An end constraint according to claim 6, characterised in that the external threads on the two externally threaded tubes (144) are of opposite helical sense.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111133524.4A CN113884289B (en) | 2021-09-27 | 2021-09-27 | End part restraint device for deep water steel catenary riser contact section test platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111133524.4A CN113884289B (en) | 2021-09-27 | 2021-09-27 | End part restraint device for deep water steel catenary riser contact section test platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113884289A true CN113884289A (en) | 2022-01-04 |
| CN113884289B CN113884289B (en) | 2022-09-16 |
Family
ID=79006991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111133524.4A Active CN113884289B (en) | 2021-09-27 | 2021-09-27 | End part restraint device for deep water steel catenary riser contact section test platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113884289B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645346A (en) * | 2012-04-09 | 2012-08-22 | 浙江大学 | Novel submarine pipe soil interaction model test platform |
| US20150240574A1 (en) * | 2014-02-26 | 2015-08-27 | Dmar Engineering, Inc. | Catenary riser testing |
| CN105021383A (en) * | 2015-06-08 | 2015-11-04 | 浙江海洋学院 | A steel catenary standpipe integral analyzing and testing apparatus |
| CN108360577A (en) * | 2018-02-06 | 2018-08-03 | 太原理工大学 | Simulate the torque loading device and method of stake top linearly or nonlinearly deflection constraint |
| KR101988906B1 (en) * | 2018-06-25 | 2019-06-13 | 사단법인 한국화재보험협회 | Experimental device for evaluating behavior and measuring fire resistance of beam with axial and rotational restraints in fire |
| CN110608907A (en) * | 2019-09-18 | 2019-12-24 | 广州大学 | Support for providing in-plane or out-of-plane elastic torsion restraint and experimental device comprising same |
| CN210347042U (en) * | 2019-09-09 | 2020-04-17 | 博格华纳排放系统（宁波）有限公司 | Vibration test tool for simulating flexible constraint |
-
2021
- 2021-09-27 CN CN202111133524.4A patent/CN113884289B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645346A (en) * | 2012-04-09 | 2012-08-22 | 浙江大学 | Novel submarine pipe soil interaction model test platform |
| US20150240574A1 (en) * | 2014-02-26 | 2015-08-27 | Dmar Engineering, Inc. | Catenary riser testing |
| CN105021383A (en) * | 2015-06-08 | 2015-11-04 | 浙江海洋学院 | A steel catenary standpipe integral analyzing and testing apparatus |
| CN108360577A (en) * | 2018-02-06 | 2018-08-03 | 太原理工大学 | Simulate the torque loading device and method of stake top linearly or nonlinearly deflection constraint |
| KR101988906B1 (en) * | 2018-06-25 | 2019-06-13 | 사단법인 한국화재보험협회 | Experimental device for evaluating behavior and measuring fire resistance of beam with axial and rotational restraints in fire |
| CN210347042U (en) * | 2019-09-09 | 2020-04-17 | 博格华纳排放系统（宁波）有限公司 | Vibration test tool for simulating flexible constraint |
| CN110608907A (en) * | 2019-09-18 | 2019-12-24 | 广州大学 | Support for providing in-plane or out-of-plane elastic torsion restraint and experimental device comprising same |
Non-Patent Citations (1)
| Title |
|---|
| 林先炜: "钢悬链线立管动力响应的参数分析与管段重量优化研究", 《中国优秀博硕士学位论文全文数据库(硕士) 工程科技Ⅰ辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113884289B (en) | 2022-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101315104B (en) | Hydraulic tensioning clamper and shaft | |
| CN113884289B (en) | End part restraint device for deep water steel catenary riser contact section test platform | |
| JP2021536557A (en) | Mass damper device, machining tool with mass damper device, and machining tool holder with mass damper device | |
| CN202834410U (en) | Elastic pipe clamp | |
| CN111884142B (en) | Cable bridge rack | |
| CN211449908U (en) | Natural gas line wall-penetrating protection structure | |
| CN212616870U (en) | Connecting structure of pressure oil tank | |
| CN113178829A (en) | Anti-galloping device for power transmission line | |
| CN219825686U (en) | Air film steel cable net node protection device | |
| CN216707272U (en) | Door seal clamp | |
| CN102829342B (en) | Lighting lamp | |
| CN209539282U (en) | Connection centralizer for measuring instrument | |
| CN219081516U (en) | Centralizer convenient to installation | |
| CN111503399A (en) | Fast-assembling type joint for mining machinery | |
| CN117823738A (en) | Three-way magnetic liquid dynamic vibration absorber | |
| CN214352082U (en) | Combined screwdriver head suitable for electric screwdriver | |
| CN220600807U (en) | Energy-consumption dynamic vibration absorber suitable for pipeline | |
| JP5343191B2 (en) | Rotary joint and mechanical seal device | |
| KR20200078848A (en) | Cable protecting application for industrial robot | |
| CN219840595U (en) | Spring piece centralizer suitable for different sleeves | |
| CN216746285U (en) | Auxiliary amplifier for Coriolis flowmeter | |
| CN214405643U (en) | Protection device for natural gas station measuring instrument | |
| CN215984697U (en) | Vortex shedding flowmeter with anti-vibration interference function | |
| CN102808826B (en) | Locking mechanism for tubular vertical rod and tubular vertical rod device employing locking mechanism | |
| CN213034483U (en) | Flowmeter mounting fixture |
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 |