CN218063820U - Aluminum alloy flange for fastening connection - Google Patents
Aluminum alloy flange for fastening connection Download PDFInfo
- Publication number
- CN218063820U CN218063820U CN202221282900.6U CN202221282900U CN218063820U CN 218063820 U CN218063820 U CN 218063820U CN 202221282900 U CN202221282900 U CN 202221282900U CN 218063820 U CN218063820 U CN 218063820U
- Authority
- CN
- China
- Prior art keywords
- flange
- plate
- pressing plate
- flange plate
- self
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The utility model relates to the technical field of aluminum alloy flanges, in particular to a tightly connected aluminum alloy flange, which comprises a first flange plate, wherein a positioning bolt is inserted into the first flange plate, a second flange plate is sleeved outside one end, away from the first flange plate, of the positioning bolt, the second flange plate is matched with the first flange plate, pipe fittings are inserted into the first flange plate and the second flange plate, one side, away from the positioning bolt, of the first flange plate is rotatably connected with a reinforcing mechanism, and one side, close to the positioning bolt, of the first flange plate is provided with a sealing mechanism; the utility model discloses a solve the poor problem of connection leakproofness between the flange that exists through the sealing mechanism who sets up, make the inside gas of gasbag carry out the inside of sealing air cushion from the inside of air duct, the laminating of sealing air cushion inflation grow helps improving the effect of connecting the leakproofness between flange board one and the flange board two in the inside of seal groove, avoids appearing the seepage, so reaches the sealed effect of improve equipment connection.
Description
Technical Field
The utility model relates to an aluminum alloy flange technical field especially relates to an aluminum alloy flange who connects fastening.
Background
The flange part in the mechanical equipment is a part structure which is commonly used, can better connect the mechanical equipment together, is called a flange disc or a flange, is a part for connecting pipe ends, and is also used for connecting the equipment inlet and the equipment outlet;
the application range of the flange is very wide, and the flange can be used in any field and any environment, so that the sealing performance and the corrosion resistance of the flange are particularly important, but in the connection process of the existing flange, the two flanges are connected through bolts, the contact tightness of the connection surfaces is poor, liquid leakage is easily caused when liquid is conveyed by a pipe fitting, and further the conveying of equipment is influenced, and in addition, when the pipe fitting is connected with the flange, the problem of insecurity of connection exists, and further the falling of the pipe fitting is easily caused;
in view of the above technical drawbacks, a solution is proposed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an aluminum alloy flange with tight connection, which solves the technical defects of the prior art, and solves the problem of loose connection of pipe fittings through a set reinforcing mechanism, so that an upper pressing plate and a lower pressing plate are tightly wrapped outside the pipe fittings, thereby being beneficial to improving the connection firmness among the pipe fittings, a first flange plate and a second flange plate and further achieving the effect of reinforcing the firm connection of the pipe fittings; the problem of poor connection sealing nature between the flange of solving the existence through the sealing mechanism who sets up makes the laminating of sealed air cushion inflation grow in the inside of seal groove, helps improving the effect of connecting sealing nature between flange board one and the flange board two, avoids appearing the seepage, so reaches the sealed effect of improve equipment connection.
The purpose of the utility model can be realized by the following technical proposal:
an aluminum alloy flange for connection and fastening comprises a first flange plate, a positioning bolt is inserted into the first flange plate, a second flange plate is sleeved outside one end, far away from the first flange plate, of the positioning bolt, the second flange plate is matched with the first flange plate, pipe fittings are inserted into the first flange plate and the second flange plate, a reinforcing mechanism is rotatably connected to one side, far away from the positioning bolt, of the first flange plate, and a sealing mechanism is arranged on one side, close to the positioning bolt, of the first flange plate;
the reinforcing mechanism comprises a first crank connecting rod, an upper pressing plate is movably connected to one end, far away from the first flange plate, of the first crank connecting rod, self-locking pins are symmetrically inserted into the inner portion of the upper pressing plate, self-locking blocks are rotatably connected to the inner portions of the self-locking pins, limiting springs are sleeved on the outer portions of the self-locking pins, a protection pad is fixedly connected to one side, close to a pipe fitting, of the upper pressing plate, a lower pressing plate is sleeved on the outer portion of the lower end of the self-locking pins, and a second crank connecting rod is rotatably connected to the lower surface of the lower pressing plate in a symmetrical mode.
Preferably, the sealing mechanism comprises a movable pressing plate, one side of the movable pressing plate, away from the first flange plate, is fixedly connected with a positioning fixture block, a reset spring is sleeved outside the movable pressing plate, one side of the first flange plate is located above the movable pressing plate and is fixedly connected with a blocking block, one end of the movable pressing plate, located inside the first flange plate, is rotatably connected with a guide pressing plate, one side of the guide pressing plate, away from the movable pressing plate, is fixedly connected with an air bag, an air guide pipe is inserted into one side of the air bag, one side of the first flange plate, away from the movable pressing plate, is fixedly connected with a sealing air cushion, and the sealing air cushion and the air guide pipe are matched with each other.
Preferably, the appearance of top board and holding down plate is the same, and the size is the same, and top board and holding down plate all are located the outside of pipe fitting, one side fixedly connected with the same protection pad that the holding down plate is close to the pipe fitting, the one end that holding down plate was kept away from to crank connecting rod two is the rotation with flange board one and is connected.
Preferably, the self-locking pin is internally provided with a groove matched with the self-locking block, one end of the self-locking block, which is positioned inside the self-locking pin, is fixedly connected with a compression spring, the other end of the compression spring is fixedly connected with the inner wall of the self-locking pin, and the upper end of the limiting spring is fixedly connected with the upper pressure plate.
Preferably, the positioning fixture block is arranged in a U shape, the positioning fixture block is matched with the movable pressing plate, one end, away from the air bag, of the air guide pipe is fixedly connected with the sealing air cushion, one side, close to the sealing air cushion, of the flange plate II is provided with a sealing groove, the sealing groove is matched with the sealing air cushion, and one end, away from the movable pressing plate, of the reset spring is fixedly connected with the surface of the flange plate I.
The utility model has the advantages as follows:
(1) The problem that the pipe fitting is not firm in connection is solved through the arranged reinforcing mechanism, the upper pressing plate and the lower pressing plate are wrapped outside the pipe fitting in a manual mode, the self-locking block on the self-locking pin penetrates through the lower pressing plate, and the self-locking block is enabled to self-lock the lower pressing plate, so that the upper pressing plate and the lower pressing plate are tightly wrapped outside the pipe fitting, the improvement of the connection firmness between the pipe fitting and the first flange plate and the second flange plate is facilitated, and the effect of reinforcing the pipe fitting and firm in connection is achieved;
(2) The problem of connecting the leakproofness poor between the flange that exists is solved through the sealing mechanism who sets up, remove the clamp plate and drive the direction clamp plate and follow the inside of flange board one and slide and extrude the gasbag, make the inside gas of gasbag carry out the inside of sealed air cushion from the inside of air duct, the laminating of sealed air cushion inflation grow is in the inside of seal groove, help improving the effect of connecting the leakproofness between flange board one and the flange board two, avoid appearing the seepage, so reach the sealed effect of improve equipment connection.
Drawings
The present invention will be further explained with reference to the accompanying drawings;
FIG. 1 is a perspective view of the present invention;
fig. 2 is a schematic structural view of the upper press plate of the present invention;
fig. 3 is a schematic structural view of the sealing air cushion of the present invention;
FIG. 4 is a schematic structural view of a second flange plate of the present invention;
fig. 5 is an enlarged view of the area a in fig. 4 according to the present invention.
Illustration of the drawings: 1. a first flange plate; 2. positioning the bolt; 3. a second flange plate; 4. a pipe fitting; 5. a reinforcement mechanism; 6. a first crank connecting rod; 7. an upper pressure plate; 8. a self-locking pin; 9. a self-locking block; 10. a limiting spring; 11. a protective pad; 12. pressing the plate downwards; 13. a crank connecting rod II; 14. a sealing mechanism; 15. moving the pressing plate; 16. positioning a fixture block; 17. a reset spring; 18. a stop block is shielded; 19. a guide pressure plate; 20. an air bag; 21. an air duct; 22. and sealing the air cushion.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
referring to fig. 1-5, the utility model relates to a tightly connected aluminum alloy flange, which comprises a flange plate 1, a positioning bolt 2 is inserted into the flange plate 1, a flange plate 3 is sleeved outside the end of the positioning bolt 2 away from the flange plate 1, the flange plate 3 is matched with the flange plate 1, a pipe 4 is inserted into the flange plate 1 and the flange plate 3, a reinforcing mechanism 5 is rotatably connected to the side of the flange plate 1 away from the positioning bolt 2, a sealing mechanism 14 is arranged on the side of the flange plate 1 close to the positioning bolt 2, when the flange is connected, the flange pipe 4 is firstly installed, two flanges with the pipe 4 installed are connected, the flange plate 1 and the flange plate 3 are spliced together, the flange plate 1 and the flange plate 3 are fastened through the positioning bolt 2, thereby the pipe fittings 4 are connected together through the flange, at the moment, the reinforcing mechanism 5 on the first adjusting flange plate 1 and the second adjusting flange plate 3 works, the reinforcing mechanism 5 comprises a first crank connecting rod 6, one end of the first crank connecting rod 6, which is far away from the first flange plate 1, is movably connected with an upper pressure plate 7, self-locking pins 8 are symmetrically inserted in the upper pressure plate 7, self-locking blocks 9 are rotatably connected in the self-locking pins 8, grooves matched with the self-locking blocks 9 are formed in the self-locking pins 8, one end, which is positioned in the self-locking blocks 9, of each self-locking block 9 is fixedly connected with a compression spring, the other end of each compression spring is fixedly connected with the inner wall of each self-locking pin 8, limit springs 10 are sleeved outside the self-locking pins 8, the upper ends of the limit springs 10 are fixedly connected with the upper pressure plate 7, one side, which is close to the pipe fittings 4, of the upper pressure plate 7 is fixedly connected with a protective cushion 11, and a lower pressure plate 12 is sleeved outside the lower ends of the self-locking pins 8, the appearance of top board 7 and holding down plate 12 is the same, the size is the same, and top board 7 and holding down plate 12 all are located the outside of pipe fitting 4, one side fixedly connected with the same protection pad 11 that holding down plate 12 is close to pipe fitting 4, the lower surface symmetry rotation of holding down plate 12 is connected with crank connecting rod two 13, crank connecting rod two 13 keeps away from one end of holding down plate 12 and is rotation connection with flange board 1, rotate crank connecting rod one 6 through manual mode, make crank connecting rod one 6 drive top board 7 and then move, make top board 7 drive the outside of protection pad 11 parcel at pipe fitting 4 of below, then rotate crank connecting rod two 13 of below, make crank connecting rod two 13 drive holding down plate 12 parcel in the below of pipe fitting 4, meanwhile, the self-locking pin 8 of top board 7 inserts the inside of holding down plate 12, make spacing spring 10 between top board 7 and the holding down plate 12 take place elastic deformation, after self-locking pin 8 inserts the inside of holding down plate 12, self-locking piece 9 on the self-locking pin 8 passes from the inside of holding down plate 12, because it influences the self-locking pin inside of the pipe fitting, thereby it is favorable to carry out the influence of the compression of the self-locking spring and the firm connection of flange board 4 and the effect of the flange board is improved to the pipe fitting 4, thereby two fastening plate 4 and the effect of the flange board 3 that the self-locking plate 4 that the self-locking plate is closely connected.
Example 2:
in the process of connecting the existing flanges, the two flanges are connected through bolts, the contact tightness of the connecting surfaces is poor, and when the pipe fitting 4 conveys liquid, the liquid is easy to leak, so that the conveying of equipment is influenced, and therefore, the existing problems are urgently needed to be solved;
after the flange plate I1 and the flange plate II 3 are connected and installed through the positioning bolts 2, the sealing mechanism 14 is controlled to work in a manual mode, the sealing mechanism 14 comprises a movable pressing plate 15, one side, far away from the flange plate I1, of the movable pressing plate 15 is fixedly connected with a positioning fixture block 16, the positioning fixture block 16 is arranged in a U shape, the positioning fixture block 16 is matched with the movable pressing plate 15, the outer part of the movable pressing plate 15 is sleeved with a reset spring 17, one end, far away from the movable pressing plate 15, of the reset spring 17 is fixedly connected with the surface of the flange plate I1, one side, far away from the movable pressing plate 15, of the flange plate I1 is fixedly connected with a shielding block 18 above the movable pressing plate 15, one end, far away from the flange plate I1, of the movable pressing plate 15 is rotatably connected with a guide pressing plate 19, one side, far away from the movable pressing plate 15, of the guide pressing plate 19 is fixedly connected with an air bag 20, and one side of the air guide tube 21 is inserted in one side of the air bag 20, one side of the flange plate I1, which is far away from the movable pressure plate 15, is fixedly connected with a sealing air cushion 22, one end of the air duct 21, which is far away from the air bag 20, is fixedly connected with the sealing air cushion 22, one side of the flange plate II 3, which is near to the sealing air cushion 22, is provided with a sealing groove, and the sealing groove is matched with the sealing air cushion 22, namely, the movable pressure plate 15 is extruded in a manual pressing mode, so that the movable pressure plate 15 slides towards the inside of the flange plate I1, along with the sliding of the movable pressure plate 15, the movable pressure plate 15 extrudes an external reset spring 17 to generate elastic deformation, meanwhile, the movable pressure plate 15 drives a guide pressure plate 19 to slide in the flange plate I1 and extrude the air bag 20, so that the pressure inside the air bag 20 is changed, the gas inside the air bag 20 is enabled to go to the inside of the sealing air cushion 22 from the inside of the air duct 21, and further the sealing air cushion 22 is enabled to expand and grow, so that the sealing air cushion 22 is attached to the inside of the sealing air cushion 22, and finally, the movable pressing plate 15 is rotated, so that the positioning clamping block 16 is clamped with the shielding block 18, the positioning clamping block 16 carries out self-locking on the movable pressing plate 15, the expansion of the sealing air cushion 22 is ensured, the effect of improving the connection sealing property between the first flange plate 1 and the second flange plate 3 is facilitated, the leakage is avoided, the effect of improving the connection sealing property of equipment is achieved, and the problem of poor connection sealing property between the flanges is solved.
The utility model discloses a working process and principle as follows:
when flanges are connected, firstly, a flanged pipe fitting 4 is installed, two flanges of the installed pipe fitting 4 are connected, a flange plate I1 and a flange plate II 3 are spliced together, the flange plate I1 and the flange plate II 3 are fastened through a positioning bolt 2, and the pipe fitting 4 is connected together through the flanges, at the moment, a crank connecting rod I6 is rotated in a manual mode, the crank connecting rod I6 drives an upper pressure plate 7 to move, the upper pressure plate 7 drives a protection pad 11 below to wrap the outer part of the pipe fitting 4, then the crank connecting rod II 13 below is rotated, the crank connecting rod II 13 drives a lower pressure plate 12 to wrap the lower pressure plate 12 below the pipe fitting 4, meanwhile, a self-locking pin 8 of the upper pressure plate 7 is inserted into the inner part of the lower pressure plate 12, a self-locking block 9 on the self-locking pin 8 penetrates through the inner part of the lower pressure plate 12, and the self-locking block 9 is self-locked to the lower pressure plate 12 due to the influence of the restoring force of a compression spring in the self-locking pin 8, so that the self-locking block 9 tightly wraps the outer part of the pipe fitting 4 and the flange plate 3, and the effect of firm connection between the pipe fitting 4 and the flange is improved;
after the flange plate 1 and the flange plate 3 are connected and installed through the positioning bolts 2, the movable pressing plate 15 is extruded in a manual pressing mode, the movable pressing plate 15 slides towards the inside of the flange plate 1, the movable pressing plate 15 extrudes the external reset spring 17 to generate elastic deformation, meanwhile, the movable pressing plate 15 drives the guide pressing plate 19 to slide in the flange plate 1 and extrude the air bag 20, the pressure inside the air bag 20 changes, the gas inside the air bag 20 enters the inside of the sealing air cushion 22 from the inside of the air duct 21, the sealing air cushion 22 expands and becomes large, the sealing air cushion 22 is attached to the inside of the sealing groove, finally, the movable pressing plate 15 is rotated, the positioning clamping block 16 is clamped with the shielding block 18, the positioning clamping block 16 is used for self-locking the movable pressing plate 15, the expansion of the sealing air cushion 22 is guaranteed, the effect of improving the connection sealing performance between the flange plate 1 and the flange plate 3 is facilitated, the leakage is avoided, the effect of improving the equipment connection sealing performance is achieved, and the problem that the connection sealing performance between flanges is poor is solved.
The above, only be the embodiment of the preferred of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, which are designed to be replaced or changed equally, all should be covered within the protection scope of the present invention.
Claims (5)
1. An aluminum alloy flange for connection and fastening comprises a first flange plate (1) and is characterized in that a positioning bolt (2) is inserted into the first flange plate (1), a second flange plate (3) is sleeved outside one end, far away from the first flange plate (1), of the positioning bolt (2), the second flange plate (3) is matched with the first flange plate (1), pipe fittings (4) are inserted into the first flange plate (1) and the second flange plate (3), one side, far away from the positioning bolt (2), of the first flange plate (1) is rotatably connected with a reinforcing mechanism (5), and a sealing mechanism (14) is arranged on one side, close to the positioning bolt (2), of the first flange plate (1);
the reinforcing mechanism (5) comprises a first crank connecting rod (6), one end of the first crank connecting rod (6), which is far away from the first flange plate (1), is movably connected with an upper pressing plate (7), a self-locking pin (8) is symmetrically inserted into the inner part of the upper pressing plate (7), a self-locking block (9) is connected to the inner part of the self-locking pin (8) in a rotating mode, a limiting spring (10) is sleeved on the outer part of the self-locking pin (8), a protective pad (11) is fixedly connected to one side, which is close to the pipe fitting (4), of the upper pressing plate (7), a lower pressing plate (12) is sleeved on the outer part of the lower end of the self-locking pin (8), and a second crank connecting rod (13) is connected to the lower pressing plate (12) in a symmetrical mode.
2. The aluminum alloy flange with the fastened connection as recited in claim 1, wherein the sealing mechanism (14) comprises a movable pressing plate (15), one side of the movable pressing plate (15), which is far away from the first flange plate (1), is fixedly connected with a positioning clamping block (16), a reset spring (17) is sleeved outside the movable pressing plate (15), one side of the first flange plate (1), which is located above the movable pressing plate (15), is fixedly connected with a blocking block (18), one end of the movable pressing plate (15), which is located inside the first flange plate (1), is rotatably connected with a guide pressing plate (19), one side of the guide pressing plate (19), which is far away from the movable pressing plate (15), is fixedly connected with an air bag (20), one side of the air bag (20) is internally inserted with an air duct (21), one side of the first flange plate (1), which is far away from the movable pressing plate (15), is fixedly connected with a sealing air cushion (22), and the sealing air cushion (22) and the air duct (21) are matched with each other.
3. The aluminum alloy flange for fastening connection according to claim 1, wherein the upper pressing plate (7) and the lower pressing plate (12) are identical in shape and size, the upper pressing plate (7) and the lower pressing plate (12) are both located outside the pipe fitting (4), one side of the lower pressing plate (12) close to the pipe fitting (4) is fixedly connected with an identical protective pad (11), and one end of the crank connecting rod II (13) far away from the lower pressing plate (12) is rotatably connected with the flange plate I (1).
4. The aluminum alloy flange for connecting and fastening according to claim 1, wherein a groove matched with the self-locking block (9) is formed in the self-locking pin (8), a compression spring is fixedly connected to one end of the self-locking block (9) located in the self-locking pin (8), the other end of the compression spring is fixedly connected with the inner wall of the self-locking pin (8), and the upper end of the limiting spring (10) is fixedly connected with the upper pressure plate (7).
5. The aluminum alloy flange for connecting and fastening as recited in claim 2, wherein the positioning fixture block (16) is arranged in a U shape, the positioning fixture block (16) is matched with the movable pressing plate (15), one end of the air duct (21) far away from the air bag (20) is fixedly connected with the sealing air cushion (22), one side of the second flange plate (3) close to the sealing air cushion (22) is provided with a sealing groove, the sealing groove is matched with the sealing air cushion (22), and one end of the reset spring (17) far away from the movable pressing plate (15) is fixedly connected with the surface of the first flange plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221282900.6U CN218063820U (en) | 2022-05-26 | 2022-05-26 | Aluminum alloy flange for fastening connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221282900.6U CN218063820U (en) | 2022-05-26 | 2022-05-26 | Aluminum alloy flange for fastening connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218063820U true CN218063820U (en) | 2022-12-16 |
Family
ID=84430898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221282900.6U Active CN218063820U (en) | 2022-05-26 | 2022-05-26 | Aluminum alloy flange for fastening connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218063820U (en) |
-
2022
- 2022-05-26 CN CN202221282900.6U patent/CN218063820U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210243092U (en) | Stop valve gas tightness high pressure detection device | |
| CN218063820U (en) | Aluminum alloy flange for fastening connection | |
| CN210372523U (en) | Pipeline plugging device | |
| CN208568188U (en) | A kind of air-tightness detection device | |
| CN209130328U (en) | A kind of novel clamp-press type connecting pipe | |
| CN209178943U (en) | A kind of efficient dam outlet sluice | |
| CN214010697U (en) | Leakproofness detection device is used in tee bend production | |
| CN109595409B (en) | Mould connects explosion-proof leak protection structure of high pressure fuel pipe joint | |
| CN213842554U (en) | Bending test system for frame pipe fitting | |
| CN211477542U (en) | Bag making detection device | |
| CN208311702U (en) | A kind of petroleum pipeline convenient for connection | |
| CN208999030U (en) | A kind of fixture of test conversion valve air-tightness | |
| CN215592601U (en) | Automatic closed oil unloading device | |
| CN218098649U (en) | A resistance to compression detection device for pipeline under pressure | |
| CN216896328U (en) | Elbow joint of low-temperature-resistant flexible manifold | |
| CN111929003A (en) | Gas pipeline tightness test device | |
| CN112377689A (en) | Novel loose flange | |
| CN215891573U (en) | Special-shaped sealing surface plugging device with temperature and pressure | |
| CN215985016U (en) | Explosion-proof valve plugging test tool | |
| CN214662737U (en) | Stainless steel flange for pressure gas pipeline | |
| CN218121285U (en) | Air tightness detection device for compressor pipe fitting | |
| CN220418764U (en) | Multidirectional air pressure film detection device | |
| CN213981468U (en) | Hydraulic test bed | |
| CN218776431U (en) | Flange processingequipment is used in valve processing | |
| CN210069189U (en) | Flange device for pipeline pressure detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |