CN107191779B - Piston-cabinet body contact simulation mechanism of pneumatic elastic model of gas cabinet - Google Patents
Piston-cabinet body contact simulation mechanism of pneumatic elastic model of gas cabinet Download PDFInfo
- Publication number
- CN107191779B CN107191779B CN201710486954.1A CN201710486954A CN107191779B CN 107191779 B CN107191779 B CN 107191779B CN 201710486954 A CN201710486954 A CN 201710486954A CN 107191779 B CN107191779 B CN 107191779B
- Authority
- CN
- China
- Prior art keywords
- piston
- supporting
- gas chamber
- piece
- piston assembly
- 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
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17B—GAS-HOLDERS OF VARIABLE CAPACITY
- F17B1/00—Gas-holders of variable capacity
- F17B1/24—Gas-holders of variable capacity of dry type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17B—GAS-HOLDERS OF VARIABLE CAPACITY
- F17B1/00—Gas-holders of variable capacity
- F17B1/02—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17B—GAS-HOLDERS OF VARIABLE CAPACITY
- F17B1/00—Gas-holders of variable capacity
- F17B1/02—Details
- F17B1/10—Guiding moving parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/08—Aerodynamic models
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention discloses a gas chamber pneumatic elastic model piston-cabinet body contact simulation mechanism which comprises a gas chamber, wherein a piston assembly is arranged in the gas chamber, a guide rod is vertically arranged between the gas chamber and the piston assembly, a floating guide piece is arranged on the piston assembly, and when the piston assembly is lifted in the gas chamber, the floating guide piece moves along the guide rod. The piston-cabinet body contact simulation mechanism for the pneumatic elastic model of the gas chamber has the obvious effects that the traditional mode of directly connecting the piston assembly with the gas chamber is avoided, the piston assembly is suspended in the gas chamber, the piston moves along the guide rod through the floating guide piece, the up-and-down lifting of the piston under the real condition can be accurately simulated, and the test accuracy is ensured.
Description
Technical Field
The invention relates to a civil engineering wind tunnel test, in particular to a piston-cabinet body contact simulation mechanism of a gas cabinet aeroelasticity model.
Background
The gas holder is a steel container for storing industrial and civil gas, and includes a wet gas holder and a dry gas holder. Wet-type gas holder is a sleeve type cylindrical structure sealed by water(ii) a The dry gas chamber is a piston structure sealed by thin (dry) oil or flexible membrane. The bell jar, the tower and the piston of the gas chamber are of movable structures, bear gas pressure and ensure good sealing performance, and the installation precision requirement is high. The gas holder body is made of carbon steel and low alloy steel. The construction site connection modes include riveting, welding and high-strength bolt connection. The welding is generally carried out by manual welding and CO 2 And (4) gas shielded welding. The cabinet top truss and the cabinet top plate are usually mounted by means of a central gantry provided. In the operation stage of the dry gas chamber, a large-mass piston inside the dry gas chamber is supported by air pressure to move up and down along the inner side of the upright post of the chamber body. In the wind tunnel test research of the gas tank aeroelastic model, the piston cannot float due to the atmospheric pressure below the piston. At the present stage, most of aeroelastic model wind tunnel tests with traditional space structures adopt a node coupling processing mode, namely, a contact point of a piston and a cabinet body is locked or fastened; the suspension state of the piston is greatly different from the actual suspension state of the piston, the actual state of the piston contacting with the cabinet body cannot be accurately simulated, and the accuracy of the test is difficult to ensure.
Disclosure of Invention
In order to solve the technical problems, the invention provides a piston-cabinet body contact simulation mechanism of a pneumatic elastic model of a gas cabinet.
The technical scheme is as follows:
a gas chamber aeroelastic model piston-cabinet body contact simulation mechanism comprises a gas chamber, a piston assembly is arranged in the gas chamber, and the key points are as follows: the gas chamber is characterized in that a guide rod is vertically arranged between the gas chamber and the piston assembly, a floating guide piece is arranged on the piston assembly, and when the piston assembly is lifted in the gas chamber, the floating guide piece moves along the guide rod.
By adopting the design, the traditional mode of directly connecting the piston assembly with the gas chamber is avoided, the piston assembly is suspended in the gas chamber, the piston moves along the guide rod through the floating guide piece, the up-and-down lifting of the piston under the real condition can be accurately simulated, and the accuracy of the test is ensured.
Preferably, the floating guide part comprises a fixed seat fixed on the piston assembly, an elastic part is arranged on the fixed seat and faces the gas chamber, and a guide roller is arranged on the elastic part and rolls along the guide rod. The guide roller moves along the guide piece, the up-and-down lifting of the piston is simulated stably, and the elastic piece is matched with the guide roller to simulate the translation of the piston.
Preferably, the elastic member is provided with a U-shaped clip, the guide roller is arranged between two vertical parts of the U-shaped clip, the guide rod is positioned between the two vertical parts of the U-shaped clip, and a rolling surface of the guide roller is attached to the guide rod. The U-shaped clamp embraces the guide rod to prevent the piston assembly from rotating and deviating
Preferably, the elastic element comprises a piston rod horizontally arranged on the fixed seat in a penetrating mode, the U-shaped clamp is installed at one end, facing the guide rod, of the piston rod, a pressure spring is sleeved on the piston rod between the fixed seat and the U-shaped clamp, and a lock pin is arranged on the piston rod on the other side of the fixed seat.
Preferably, a central supporting cylinder is movably arranged in the center of the piston assembly in a penetrating mode, a plurality of test sites are axially arranged on the central supporting cylinder, the piston assembly is sleeved outside the central supporting cylinder, and the piston assembly is correspondingly arranged at any one of the test sites. By adopting the scheme, the piston assembly can be arranged at any axial position of the central supporting cylinder according to the position to be tested, and is used for simulating the stress characteristics of the piston at a low position, a middle position and a high position.
Preferably, the center support section of thick bamboo includes the barrel the outer wall axial of barrel is equipped with multiunit screw group, and this screw group forms test site, every group the screw group includes 3 at least location screw, and is organized all with the same in the screw group location screw hoop distributes the outer wall of barrel, the outer wall of barrel is equipped with piston support spare, and this piston support spare is supporting bolt, and be organized all with the same in the screw group be equipped with respectively in the location screw supporting bolt, piston assembly falls on the piston support spare. The screw hole group marks and positions the specific position to be tested on one hand, and on the other hand, the screw hole group is convenient to be quickly assembled and disassembled with the supporting bolt.
Preferably, at least three leveling support legs are annularly arranged at the lower end of the cylinder body and comprise a rib plate which is vertically arranged, the rib plate is connected with the outer wall of the cylinder body, the lower edge of the rib plate is horizontally connected with a supporting bottom plate, and a leveling bolt penetrates through a vertical thread on the supporting bottom plate.
Preferably, the piston assembly comprises a piston support plate, a piston model is arranged above the piston support plate, a rolling support part is arranged on the upper surface of the piston support plate, the piston model falls on the rolling support part, and the piston support plate is arranged at any one test position. According to the design scheme, the piston model falls on the piston support plate through the rolling support piece, and the piston translation is simulated during wind tunnel test research of the gas tank aeroelastic model.
Preferably, the piston mold comprises a mold frame, a piston suspension base plate is arranged between the mold frame and the piston support plate, the piston suspension base plate is fixed with the mold frame, and the piston suspension base plate falls on the rolling support.
Preferably, the rolling support member comprises a mounting base body and a support ball embedded in the mounting base body in a rolling manner, the mounting base body is fixed on a piston support plate, the support ball supports the piston suspension base plate, and at least three rolling support members are circumferentially distributed on the piston support plate.
Has the beneficial effects that: by adopting the piston-cabinet body contact simulation mechanism of the pneumatic elastic model of the gas chamber, the traditional mode of directly connecting the piston assembly with the gas chamber is avoided, the piston assembly is suspended in the gas chamber, the piston moves along the guide rod through the floating guide piece, the up-and-down lifting of the piston under the real condition can be accurately simulated, and the test accuracy is ensured.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
fig. 2 is a schematic structural view of a floating guide d 2;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a schematic view of the mounting of the piston assembly b on the central support cylinder a;
FIG. 5 is a schematic view of the installation of the center support cylinder a;
FIG. 6 is a top view of FIG. 5;
FIG. 7 is a schematic structural view of a piston assembly b;
fig. 8 is a schematic view of the mounting of the rolling support b4 on the piston support plate b 1;
fig. 9 is a schematic view showing the distribution of the rolling support b4 on the piston support plate b 1.
Detailed Description
The invention is further illustrated by the following examples and figures.
As shown in fig. 1, 2 and 3, the gas holder aeroelastic model piston-holder body contact simulation mechanism comprises a gas holder c, a piston assembly b is arranged in the gas holder c, a guide rod d1 is vertically arranged between the gas holder c and the piston assembly b, a floating guide piece d2 is arranged on the piston assembly b, and when the piston assembly b is lifted in the gas holder c, the floating guide piece d2 moves along the guide rod d 1.
The floating guide piece d2 comprises a fixed seat d3 fixed on the piston assembly b, an elastic piece is arranged on the fixed seat d3 and faces the gas chamber c, a guide roller d5 is arranged on the elastic piece, and the guide roller d5 rolls along the guide rod d 1.
The elastic piece is provided with a U-shaped card d7, the guide roller d5 is arranged between two vertical parts of the U-shaped card d7, the guide rod d1 is positioned between the two vertical parts of the U-shaped card d7, and the rolling surface of the guide roller d5 is attached to the guide rod d 1.
The elastic piece comprises a piston rod d4 horizontally arranged on the fixed seat d3 in a penetrating mode, the U-shaped clamp d7 is installed at one end, facing the guide rod d1, of the piston rod d4, a pressure spring d6 is sleeved on the piston rod d4 between the fixed seat d3 and the U-shaped clamp d7, and a lock pin is arranged on the piston rod d4 on the other side of the fixed seat d 3.
As can be seen in conjunction with fig. 5 to 9: the center of the piston assembly b movably penetrates through a center supporting cylinder a, the center supporting cylinder a is axially provided with a plurality of test sites, the piston assembly b is sleeved outside the center supporting cylinder a, and the piston assembly b is correspondingly arranged at any one of the test sites.
The center support cylinder a comprises a cylinder body a1, a plurality of groups of screw hole groups are axially arranged on the outer wall of the cylinder body a1, the screw hole groups form test sites and each group of screw hole groups comprise at least 3 positioning screw holes a4, all the screw hole groups are arranged in the same group, the circumferential directions of the positioning screw holes a4 are distributed on the outer wall of the cylinder body a1, the outer wall of the cylinder body a1 is provided with a piston support piece a3, the piston support piece a3 is a support bolt, all the screw hole groups are arranged in the same group, the positioning screw holes a4 are respectively provided with the support bolt, and the piston assembly b falls on the piston support piece a 3.
The lower end of the cylinder a1 is annularly provided with at least three leveling support legs a2, each leveling support leg a2 comprises a rib plate a7 which is vertically arranged, each rib plate a7 is connected with the outer wall of the cylinder a1, the lower edge of each rib plate a7 is horizontally connected with a supporting bottom plate a5, and a leveling bolt a6 penetrates through vertical threads on the supporting bottom plate a 5.
The piston assembly b comprises a piston support plate b1, a piston model b2 is arranged above the piston support plate b1, a rolling support member b4 is arranged on the upper surface of the piston support plate b1, the piston model b2 falls on the rolling support member b4, and the piston support plate b1 falls on the support bolt.
Piston model b2 includes model frame b8, is equipped with piston suspension backing plate b3 between this model frame b8 and the piston backup pad b1, and this piston suspension backing plate b3 is fixed with model frame b8, and this piston suspension backing plate b3 falls on the support piece b4 rolls, piston backup pad b1, piston suspension backing plate b3 and model frame b8 all are the ring form, piston backup pad b1, piston suspension backing plate b3 and model frame b 8's cyclic annular center coincidence, piston backup pad b1, piston suspension backing plate b3 and model frame b8 cover are established on barrel a1, fixing base d3 is fixed on the model frame b 8.
The rolling support piece b4 comprises a mounting seat body b5 and a support ball b6 embedded in the mounting seat body b5 in a rolling mode, the mounting seat body b5 is fixed on a piston support plate b1, the support ball b6 lifts a piston suspension base plate b3, and at least three rolling support pieces b4 are distributed on the piston support plate b1 in the circumferential direction.
A support mounting hole is formed in the piston support plate b1 corresponding to the rolling support b4, a horizontal support lug b7 is arranged on the mounting base b5, the mounting base b5 sinks downwards into the support mounting hole, and the horizontal support lug b7 is attached to the upper surface of the piston support plate b1 and is fixedly connected with the piston support plate b 1.
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.
Claims (1)
1. The utility model provides a gas chamber aeroelasticity model piston-cabinet body contact analog mechanism, includes gas chamber (c), is equipped with piston assembly (b) in this gas chamber (c), its characterized in that: a guide rod (d 1) is vertically arranged between the gas chamber (c) and the piston assembly (b), a floating guide piece (d 2) is arranged on the piston assembly (b), and when the piston assembly (b) is lifted in the gas chamber (c), the floating guide piece (d 2) moves along the guide rod (d 1);
the floating guide piece (d 2) comprises a fixed seat (d 3) fixed on the piston assembly (b), an elastic piece is arranged on the fixed seat (d 3) and faces the gas chamber (c), a guide roller (d 5) is arranged on the elastic piece, and the guide roller (d 5) rolls along the guide rod (d 1);
a U-shaped card (d 7) is mounted on the elastic piece, the guide roller (d 5) is mounted between two vertical parts of the U-shaped card (d 7), the guide rod (d 1) is positioned between the two vertical parts of the U-shaped card (d 7), and the rolling surface of the guide roller (d 5) is attached to the guide rod (d 1);
the elastic piece comprises a piston rod (d 4) horizontally arranged on the fixed seat (d 3) in a penetrating mode, one end, facing the guide rod (d 1), of the piston rod (d 4) is provided with the U-shaped clamp (d 7), a pressure spring (d 6) is sleeved on the piston rod (d 4) between the fixed seat (d 3) and the U-shaped clamp (d 7), and a lock pin is arranged on the piston rod (d 4) on the other side of the fixed seat (d 3);
a central supporting cylinder (a) is movably arranged in the center of the piston assembly (b) in a penetrating mode, a plurality of test sites are axially arranged on the central supporting cylinder (a), the piston assembly (b) is sleeved outside the central supporting cylinder (a), and the piston assembly (b) is correspondingly arranged at any one of the test sites;
the central supporting cylinder (a) comprises a cylinder body (a 1), a plurality of groups of screw hole groups are axially arranged on the outer wall of the cylinder body (a 1), the screw hole groups form the test sites, each group of screw hole groups comprises at least 3 positioning screw holes (a 4), all the positioning screw holes (a 4) in the same group of screw hole groups are annularly distributed on the outer wall of the cylinder body (a 1), the outer wall of the cylinder body (a 1) is provided with a piston supporting piece (a 3), the piston supporting piece (a 3) is a supporting bolt, the supporting bolts are respectively arranged in all the positioning screw holes (a 4) in the same group of screw hole groups, and the piston assembly (b) falls on the piston supporting piece (a 3);
the lower end of the cylinder (a 1) is annularly provided with at least three leveling support legs (a 2), each leveling support leg (a 2) comprises a rib plate (a 7) which is vertically arranged, each rib plate (a 7) is connected with the outer wall of the cylinder (a 1), the lower edge of each rib plate (a 7) is horizontally connected with a supporting bottom plate (a 5), and a leveling bolt (a 6) penetrates through the vertical thread on each supporting bottom plate (a 5);
the piston assembly (b) comprises a piston supporting plate (b 1), a piston model (b 2) is arranged above the piston supporting plate (b 1), a rolling supporting piece (b 4) is arranged on the upper surface of the piston supporting plate (b 1), the piston model (b 2) falls on the rolling supporting piece (b 4), and the piston supporting plate (b 1) is arranged at any test site;
the piston model (b 2) comprises a model frame (b 8), a piston suspension base plate (b 3) is arranged between the model frame (b 8) and the piston support plate (b 1), the piston suspension base plate (b 3) is fixed with the model frame (b 8), and the piston suspension base plate (b 3) falls on the rolling support piece (b 4);
roll support piece (b 4) including installation pedestal (b 5) and roll inlay establish support ball (b 6) in this installation pedestal (b 5), installation pedestal (b 5) are fixed on piston backup pad (b 1), support ball (b 6) lift piston suspension backing plate (b 3) it has at least three to go up the annular distribution in piston backup pad (b 1 roll support piece (b 4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710486954.1A CN107191779B (en) | 2017-06-23 | 2017-06-23 | Piston-cabinet body contact simulation mechanism of pneumatic elastic model of gas cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710486954.1A CN107191779B (en) | 2017-06-23 | 2017-06-23 | Piston-cabinet body contact simulation mechanism of pneumatic elastic model of gas cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107191779A CN107191779A (en) | 2017-09-22 |
| CN107191779B true CN107191779B (en) | 2023-04-18 |
Family
ID=59878291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710486954.1A Active CN107191779B (en) | 2017-06-23 | 2017-06-23 | Piston-cabinet body contact simulation mechanism of pneumatic elastic model of gas cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107191779B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114964698B (en) * | 2022-08-01 | 2022-10-25 | 中国航空工业集团公司沈阳空气动力研究所 | Bent knife clamping mechanism |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB228986A (en) * | 1923-11-12 | 1925-02-12 | Henry Stinton Smith Rewse | Improvements in gasholders |
| JP2003114000A (en) * | 2001-10-05 | 2003-04-18 | Yoshio Suetsugu | Multistage dry seal gas holder |
| CN102305345A (en) * | 2011-08-29 | 2012-01-04 | 中冶赛迪工程技术股份有限公司 | Rolling type electromagnetic flexible anti-swing device |
| CN202392433U (en) * | 2011-12-19 | 2012-08-22 | 冯磊 | Automatic monitoring device for balance of dry type gas tank piston |
| JP2016148376A (en) * | 2015-02-12 | 2016-08-18 | 株式会社Ihi | Gas holder |
| JP2016151343A (en) * | 2015-02-19 | 2016-08-22 | 三菱重工メカトロシステムズ株式会社 | Gas holder |
| JP2016161113A (en) * | 2015-03-05 | 2016-09-05 | 株式会社Ihi | Gas holder |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR337436A (en) * | 1903-12-05 | 1904-04-09 | Paul Valentin Bellanger | Gasometer |
| GB1381864A (en) * | 1971-04-13 | 1975-01-29 | Nat Res Dev | Wind tunnel |
| CN104596728B (en) * | 2015-02-05 | 2017-03-08 | 重庆大学 | A kind of large-scale gas chamber piston air spring pole method for designing based on coal gas internal pressure |
| CN204494069U (en) * | 2015-03-16 | 2015-07-22 | 中冶赛迪工程技术股份有限公司 | Gas chamber piston clamping adjustment device |
| CN105927845B (en) * | 2016-04-28 | 2017-12-08 | 中冶华天工程技术有限公司 | The remodeling method of regular polygon thin-oil sealed gas tank |
| CN207145960U (en) * | 2017-06-23 | 2018-03-27 | 重庆科技学院 | Gas chamber aeroelastic model piston cabinet contacts simulation mechanism |
-
2017
- 2017-06-23 CN CN201710486954.1A patent/CN107191779B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB228986A (en) * | 1923-11-12 | 1925-02-12 | Henry Stinton Smith Rewse | Improvements in gasholders |
| JP2003114000A (en) * | 2001-10-05 | 2003-04-18 | Yoshio Suetsugu | Multistage dry seal gas holder |
| CN102305345A (en) * | 2011-08-29 | 2012-01-04 | 中冶赛迪工程技术股份有限公司 | Rolling type electromagnetic flexible anti-swing device |
| CN202392433U (en) * | 2011-12-19 | 2012-08-22 | 冯磊 | Automatic monitoring device for balance of dry type gas tank piston |
| JP2016148376A (en) * | 2015-02-12 | 2016-08-18 | 株式会社Ihi | Gas holder |
| JP2016151343A (en) * | 2015-02-19 | 2016-08-22 | 三菱重工メカトロシステムズ株式会社 | Gas holder |
| JP2016161113A (en) * | 2015-03-05 | 2016-09-05 | 株式会社Ihi | Gas holder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107191779A (en) | 2017-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109556965B (en) | Shield segment mechanical property simulation test device | |
| CN107191779B (en) | Piston-cabinet body contact simulation mechanism of pneumatic elastic model of gas cabinet | |
| CN206269835U (en) | A kind of polymorphic type measuring instrument coaxially assembles device | |
| CN208043562U (en) | One kind can move freely formula beams of concrete counter-force loading frame | |
| CN202736506U (en) | Reactor internal hoisting tool | |
| CN107907333B (en) | Cylindrical elastic bearing fatigue test device | |
| CN106644260B (en) | 2MN dead weight superposition composite force standard machine | |
| CN201351093Y (en) | Connecting device for connecting top rotating part and rotary supporting device of crane | |
| CN107061984B (en) | Piston support system for gas holder aeroelastic model wind tunnel test | |
| CN207145958U (en) | Piston support system for gas chamber air spring pole wind tunnel test | |
| CN207145960U (en) | Gas chamber aeroelastic model piston cabinet contacts simulation mechanism | |
| CN213749367U (en) | Fixing device of test block of springback strength measurement curve | |
| CN107179173B (en) | Novel gas holder aeroelastic model system | |
| CN105042293A (en) | Leveling mechanism for measuring instruments | |
| CN107084311B (en) | Method for manufacturing pneumatic elastic model of gas cabinet body | |
| CN210487522U (en) | Cold-resistant thermal shock resistance detection device of sizing material | |
| CN107121260B (en) | Gas holder pneumatic elastic model wind tunnel test displacement measurement system | |
| CN204101384U (en) | Large-tonnage pressure test bench | |
| CN205822230U (en) | Foundation bolt positioning device in high precision | |
| CN216157803U (en) | Hydroelectric set thrust bearing overhauls training analog system | |
| CN206420645U (en) | A kind of holding claw formula valve-testing machine | |
| CN216410495U (en) | Manometer precision detection device | |
| CN207318042U (en) | Typical Gas Tank aeroelastic model system | |
| CN219828442U (en) | Auxiliary tool for overhauling and reforming underground gas pipeline valve | |
| CN204456921U (en) | Mechanical type net frame leveling support saddle for building |
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 |