CN215293622U - Butterfly valve with external correction seal - Google Patents
Butterfly valve with external correction seal Download PDFInfo
- Publication number
- CN215293622U CN215293622U CN202121675247.5U CN202121675247U CN215293622U CN 215293622 U CN215293622 U CN 215293622U CN 202121675247 U CN202121675247 U CN 202121675247U CN 215293622 U CN215293622 U CN 215293622U
- Authority
- CN
- China
- Prior art keywords
- valve
- plate
- rod
- connecting rod
- rocker
- 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
Landscapes
- Lift Valve (AREA)
Abstract
The utility model provides a butterfly valve with external correction seal, which comprises a valve body, wherein the valve body is a steel plate welding structure with a cylinder in the middle; the valve seat is a circular cavity surrounded by two semicircular grooves formed by bending steel plates, the outer ring of the cavity is welded with the inner cylindrical steel plate of the valve body, and the middle of the cavity is separated by a partition plate; the valve plate consists of two semicircular plates with the same diameter as the valve seat; the valve plate and the valve seat are sealed through a first sealing ring; a valve plate connecting frame of the rocker mechanism is fixedly connected to the gravity center of a semicircular plate of the valve plate; the valve rod transversely penetrates through a main rocker of the rocker mechanism and is fixedly connected with the main rocker; one end of the valve rod is positioned in a shaft hole of the valve body, which is provided with a bearing and an end cover, and is rotationally connected with the valve body, and the other end of the valve rod is fixedly connected with a rocker arm; the adjusting plate of the rocker mechanism is connected with the sliding sleeve in the correcting mechanism in a sliding way. The problems of position errors caused in the production and assembly processes of the existing butterfly valve, deformation in the use process and the like are solved, and the maintenance cost is effectively reduced.
Description
Technical Field
The utility model belongs to the technical field of the butterfly valve is sealed, a butterfly valve with outside correction is sealed is related to.
Background
The butterfly valve is a regulating valve with a simple structure, is mainly applied to petrochemical industry, metallurgy industry and nuclear power industry, and has strict sealing/leakage requirements. At present, the tightness adjustment and the sealing performance experiment of the butterfly valve are carried out before leaving a factory, and the butterfly valve cannot be corrected and adjusted according to actual sealing requirements after being used in corresponding pipeline occasions.
The butterfly valve in the prior art comprises a valve body, a valve plate, a rocker assembly, a limiting assembly, an actuating mechanism and the like. The lower end of the rocker assembly is connected with the valve plate through a main rocker penetrating through the valve rod, and the upper portion of a valve plate fixing plate at the other end of the rocker assembly is placed between the two limiting assemblies. In the use, whether the valve plate is the smooth sealing ring in the compaction valve seat is corrected by adjusting bolts on the two limiting assemblies.
In the use process of the valve, factors such as abrasion of a bearing, deformation of a connecting rod mechanism and the like can cause sealing failure. The prior art can solve the problem of correcting radial deformation of the valve caused by bearing abrasion and valve rod deformation, but has the defects that the axial deformation and the deformation of a rocker assembly cannot be corrected, and the correction cannot be performed in the using process.
Disclosure of Invention
In order to achieve the purpose, the utility model provides a butterfly valve with it is sealed that outside correction has solved disk seat position error, plane degree error and the sealing washer that arouses in current butterfly valve production, the assembling process and has produced the deformation scheduling problem in the use.
In order to solve the technical problem, the technical scheme adopted by the utility model is that the utility model provides a butterfly valve with external correction seal, which comprises a valve body, a valve seat, a valve rod, a valve plate, a pull rod, a rocker mechanism and a correction mechanism; the valve body is of a cylindrical hollow steel plate welding structure; the valve seat is a circular cavity surrounded by two semicircular grooves formed by bending steel plates, the outer ring of the cavity is welded with the inner cylindrical steel plate of the valve body, and the middle of the cavity is separated by a partition plate; the valve plate consists of two semicircular plates with the same diameter as the valve seat and is positioned in the valve seat; the valve plate and the valve seat are sealed through a first sealing ring; the valve plate connecting frame of the rocker mechanism is fixedly connected to the gravity center of the semicircular plate of the valve plate; the adjusting plate of the rocker mechanism is in sliding connection with a sliding sleeve in the correcting mechanism; the two valve rods and the two rocker mechanisms are symmetrically arranged along the center of the valve plate; one end of the valve rod is rotatably connected with a shaft hole which is provided with a bearing and an end cover on the valve body, and the other end of the valve rod is fixedly connected with the rocker arm;
the upper end of the pull rod is rotatably connected with a first connecting rod, a second connecting rod and a third connecting rod, wherein one end of the first connecting rod, which is far away from the pull rod, is rotatably connected with one end of the upper rocker arm, which is far away from the valve rod, one end of the second connecting rod, which is far away from the pull rod, is rotatably connected with a bracket of the driving device, and one end of the third connecting rod, which is far away from the pull rod, is rotatably connected with a fourth connecting rod and a fifth connecting rod; the lower end of the pull rod is rotatably connected with one end of the rocker arm positioned below and deviating from the valve rod; one end of the fourth connecting rod, which is far away from the pull rod, is rotatably connected with a bracket of the driving device and is parallel to the third connecting rod, and the length of the fourth connecting rod is equal to that of the third connecting rod; one end of the fifth connecting rod, which is far away from the third connecting rod, is connected with the sixth connecting rod; one end of the sixth connecting rod, which is far away from the fifth connecting rod, is fixedly connected with the driving device; the rocker mechanism formed among the first connecting rod, the second connecting rod, the third connecting rod, the fourth connecting rod, the fifth connecting rod, the sixth connecting rod, the pull rod and the rocker arms can drive the two rocker arms to rotate towards opposite directions respectively when the driving device rotates, wherein the second connecting rod and the fourth connecting rod play a limiting role, and the situation that the driving device is prevented from excessively driving the rocker arms to further drive the valve rod and the valve plate to excessively increase in rotation angle is avoided.
Further, the rocker mechanism is a four-bar mechanism and comprises a valve plate connecting frame, a main rocker, a connecting rod plate and an adjusting plate; the adjusting plate is in a shape of a v-21274, a long hole is formed at the upper end of the adjusting plate and is used for being in sliding connection with a sliding sleeve of the correcting mechanism, a turning part at the lower end of the adjusting plate is in rotating connection with the main rocker through a valve rod, and the tail part at the lower end of the adjusting plate is in rotating connection with the connecting rod plate; the valve rod transversely penetrates through the main rocker and is fixedly connected with the main rocker; the end of the valve plate connecting frame far away from the valve plate is rotatably connected with the end of the connecting rod plate far away from the adjusting plate, and the middle of the valve plate connecting frame is rotatably connected with the main rocker.
Furthermore, the correcting mechanism comprises an adjusting rod, a locking nut, a sealing box and a sliding sleeve; the sliding sleeve is fixedly connected with the adjusting rod; the adjusting rod penetrates through a sealing box containing a second sealing ring and a shaft sleeve, the second sealing ring is positioned in the shaft sleeve and clings to the shaft sleeve and the adjusting rod, and the sealing box is used for sealing the periphery of the adjusting rod; the sealing box is fixedly arranged in the valve body, and a gland fixed by bolts is arranged on the sealing box; the sliding sleeve is connected with the long hole of the adjusting plate through a shaft pin, and the sliding sleeve can slide in the long hole; the adjusting rod is fixed on the pressure cover and is connected with one end, deviating from the adjusting plate, of the adjusting rod through threads, one part, extending out of the adjusting rod, of the adjusting rod is in a regular hexagon shape, and the length, extending into the valve body, of the adjusting rod can be adjusted by rotating the regular hexagon through a wrench.
The utility model has the advantages that:
(1) the utility model discloses can be in assembly, experiment, in the use any occasion, any time, carry out the correction of degree of sealing in real time/accurately, fully avoided various sealed not tight flaws, fully guaranteed to reveal the standard, reduced processing and welding control, reduced manufacturing cost, improved processing and assembly efficiency.
(2) The utility model provides a sealed not tight problem that brings because of the error of the sealed face of disk seat in processing, assembling process to and the deformation that the sealing washer produced all has the function of better regulation in the use, and can play the correction effect from the outside in real time, reduced cost of maintenance, prolonged the life of spare part, complete machine.
(3) The invention solves the hidden trouble of untight sealing caused by bearing abrasion, valve rod deformation and deformation generated by the sealing ring in the use process. Under the condition of no shutdown/no production stop on site, the device can be adjusted in real time from the outside, and plays a role in correction. The production stoppage/shutdown in the production process is avoided, the failure rate is reduced, and the safety is greatly improved.
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 is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a structural diagram of an embodiment of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a sectional view a-a in fig. 1.
Fig. 4 is a partial view of fig. 3.
Fig. 5 is an opening view of a butterfly valve with an external trim seal according to an embodiment of the invention.
In the figure, 1, a valve body, 2, a valve seat, 3, a valve rod, 4, a valve plate, 5, a pull rod, 6, a rocker mechanism, 7, a correcting mechanism, 8, a first sealing ring, 9, a valve plate connecting frame, 10, a main rocker, 11, a connecting rod plate, 12, an adjusting plate, 13, an adjusting rod, 14, a locking nut, 15, a sealing box, 16, a second sealing ring, 17, a sliding sleeve, 18, a shaft sleeve, 19, a gland, 20, a rocker arm, 21, a first connecting rod, 22, a second connecting rod, 23, a third connecting rod, 24, a fourth connecting rod, 25, a fifth connecting rod, 26, a sixth connecting rod and 27 are driving devices.
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.
As shown in fig. 1-5, the utility model provides a butterfly valve with external correction seal, which comprises a valve body 1, a valve seat 2, a valve rod 3, a valve plate 4, a pull rod 5, a rocker mechanism 6 and a correction mechanism 7; the valve body 1 is a cylindrical hollow steel plate welding structure; the valve seat 2 is a circular cavity surrounded by two semicircular grooves formed by bending steel plates, the outer ring of the cavity is welded with the inner cylindrical steel plate of the valve body 1, and the middle of the cavity is separated by a partition plate; the valve plate 4 consists of two semicircular plates with the same diameter as the valve seat 2 and is positioned in the valve seat 2; the valve plate 4 and the valve seat 2 are sealed through a first sealing ring 8; the valve plate connecting frame 9 of the rocker mechanism 6 is fixedly connected to the gravity center of the semicircular plate of the valve plate 4; an adjusting plate 12 of the rocker mechanism 6 is in sliding connection with a sliding sleeve 17 in the correcting mechanism 7, so that the adjusting plate 12 can slide left and right; the two valve rods 3 and the two rocker mechanisms 6 are symmetrically arranged along the center of the valve plate 4; one end of the valve rod 3 is rotatably connected with a shaft hole which is provided with a bearing and an end cover on the valve body 1, and the other end of the valve rod is fixedly connected with the rocker arm 20;
a first connecting rod 21, a second connecting rod 22 and a third connecting rod 23 are rotatably connected to the upper end of the pull rod 5, wherein one end of the first connecting rod 21, which is far away from the pull rod 5, is rotatably connected with one end of the upper rocker arm 20, which is far away from the valve rod 3, one end of the second connecting rod 22, which is far away from the pull rod 5, is rotatably connected with a bracket of a driving device 27, and one end of the third connecting rod 23, which is far away from the pull rod 5, is rotatably connected with a fourth connecting rod 24 and a fifth connecting rod 25; the lower end of the pull rod 5 is rotatably connected with one end of the rocker arm 20 positioned below and departing from the valve rod 3; one end of the fourth connecting rod 24, which is far away from the pull rod 5, is rotatably connected with a bracket of the driving device 27 and is parallel to the third connecting rod 23 and has the same length; the end of the fifth link 25, which is far away from the third link 23, is connected with a sixth link 26; one end of the sixth connecting rod 26, which is far away from the fifth connecting rod 25, is fixedly connected with the output end of the driving device 27; the rocker mechanism formed among the first connecting rod 21, the second connecting rod 22, the third connecting rod 23, the fourth connecting rod 24, the fifth connecting rod 25, the sixth connecting rod 26, the pull rod 5 and the rocker arms 20 can drive the two rocker arms 20 to rotate towards opposite directions when the driving device rotates, wherein the second connecting rod 22 and the fourth connecting rod 24 play a role in limiting, and the situation that the driving device 27 drives the rocker arms 20 to further drive the valve rod 3 and the valve plate 4 to rotate by too large rotation angles is prevented.
Further, the rocker mechanism 6 is a four-bar mechanism, and comprises a valve plate connecting frame 9, a main rocker 10, a connecting rod plate 11 and an adjusting plate 12; the adjusting plate 12 is in a shape of a letter 21274, the upper end of the adjusting plate is provided with a long hole which is used for being connected with a sliding sleeve 17 of the correcting mechanism 7 in a sliding way and can slide left and right, a corner at the lower end of the adjusting plate 12 is rotatably connected with the main rocker 10 through the valve rod 3, and the tail of the lower end of the adjusting plate 12 is rotatably connected with the connecting rod plate 11; the end of the valve plate connecting frame 9 far away from the valve plate 4 is rotatably connected with the end of the connecting rod plate 11 far away from the adjusting plate 12, and the middle of the valve plate connecting frame 9 is rotatably connected with the main rocker 10.
Further, the correcting mechanism 7 comprises an adjusting rod 13, a lock nut 14, a sealing box 15 and a sliding sleeve 17; the sliding sleeve 17 is fixedly connected with the adjusting rod 13; the adjusting rod 13 penetrates through a sealing box 15 containing a second sealing ring 16 and a shaft sleeve 18, the second sealing ring 16 is fixed in the shaft sleeve 18 and clings to the shaft sleeve 18 and the adjusting rod 13, and the sealing box 15 is used for sealing the periphery of the adjusting rod 13; the sealing box 15 is fixedly arranged in the valve body 1, and a gland 19 fixed by bolts is arranged on the sealing box 15 to prevent the second sealing ring from moving; the sliding sleeve 17 is connected with the long hole of the adjusting plate 12 through a shaft pin, and the sliding sleeve 17 can slide in the long hole; the locking nut 14 is fixed on the gland 19 and is connected to one end of the adjusting rod 13, which is far away from the adjusting plate 12, through threads, the part of the adjusting rod 13, which extends out of the locking nut 14, is a regular hexagon, and the regular hexagon can be rotated by a wrench to adjust the length of the adjusting rod 13, which extends into the valve body 1.
The utility model discloses a working process does:
when the valve needs to be opened, the driving device 27 is used for driving the valve rod 3 to rotate anticlockwise, the main rocker 10 rotates along with the valve rod 3, the valve plate connecting frame 9 rotates around the valve rod 3, the connecting rod plate 11 correspondingly rotates, and the position of the adjusting plate 12 is fixed; the same principle is adopted when the valve is closed: the valve rod 3 is driven to rotate clockwise by the driving device.
When the valve seat needs to be corrected, the adjusting rod 13 is rotated by a wrench to move downwards, the adjusting plate 12, the valve plate connecting frame 9 and the connecting rod plate 11 are finely adjusted clockwise around the valve rod 3, and the main rocker 10 is not moved, so that the valve plate 4 is more tightly pressed on the sealing ring on the valve seat 2; similarly, the valve plate 4 and the sealing ring can be loosened when the adjusting rod 13 moves upwards.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (3)
1. The butterfly valve with the external correction seal is characterized by comprising a valve body (1), a pull rod (5) and a correction mechanism (7); the valve body (1) is of a cylindrical hollow steel plate welding structure; the valve seat (2) is a circular cavity surrounded by two semicircular grooves formed by bending steel plates, the outer ring of the cavity is welded with the cylindrical steel plate in the valve body (1), and the middle of the cavity is separated by a partition plate; the valve plate (4) consists of two semicircular plates with the same diameter as the valve seat (2) and is positioned in the valve seat (2); the valve plate (4) and the valve seat (2) are sealed through a first sealing ring (8); the valve rod (3) crosses the main rocker (10) of the rocker mechanism (6) and is fixedly connected with the main rocker (10); one end of the valve rod (3) is positioned in a shaft hole of the valve body (1) provided with a bearing and an end cover and is rotationally connected with the valve body (1), and the other end of the valve rod is fixedly connected with a rocker arm (20); a valve plate connecting frame (9) of the rocker mechanism (6) is fixedly connected to the gravity center of the semicircular plate of the valve plate (4); an adjusting plate (12) of the rocker mechanism (6) is in sliding connection with a sliding sleeve (17) in the correcting mechanism (7); the two valve rods (3) and the two rocker mechanisms (6) are arranged symmetrically along the center of the valve plate (4);
the correcting mechanism (7) comprises an adjusting rod (13), a locking nut (14), a sealing box (15) and a sliding sleeve (17); the sliding sleeve (17) is fixedly connected with the adjusting rod (13); the adjusting rod (13) penetrates through a sealing box (15) containing a second sealing ring (16) and a shaft sleeve (18), the second sealing ring (16) is fixed in the shaft sleeve (18) and clings to the shaft sleeve (18) and the adjusting rod (13), and the sealing box (15) is used for sealing the periphery of the adjusting rod (13); the sealing box (15) is fixedly arranged in the valve body (1), and a gland (19) fixed by bolts is arranged on the sealing box (15); the sliding sleeve (17) is connected with a long hole of the adjusting plate (12) through a shaft pin, and the sliding sleeve (17) can slide in the long hole; the locking nut (14) is fixed on the gland (19) and is connected to one end, deviating from the adjusting plate (12), of the adjusting rod (13) through threads, and the part, extending out of the locking nut (14), of the adjusting rod (13) is in a regular hexagon shape.
2. The butterfly valve with the external correction seal according to claim 1, characterized in that a first connecting rod (21), a second connecting rod (22) and a third connecting rod (23) are rotatably connected to the upper end of the pull rod (5), wherein one end of the first connecting rod (21) facing away from the pull rod (5) is rotatably connected to one end of the upper rocker arm (20) facing away from the valve rod (3), one end of the second connecting rod (22) facing away from the pull rod (5) is rotatably connected to a bracket of a driving device (27), and one end of the third connecting rod (23) facing away from the pull rod (5) is rotatably connected to a fourth connecting rod (24) and a fifth connecting rod (25); the lower end of the pull rod (5) is rotatably connected with one end of the rocker arm (20) which is positioned below and deviates from the valve rod (3); one end of the fourth connecting rod (24) departing from the pull rod (5) is rotatably connected with a bracket of the driving device (27), and is parallel to the third connecting rod (23) and has the same length; one end of the fifth connecting rod (25) departing from the third connecting rod (23) is connected with the sixth connecting rod (26); one end of the sixth connecting rod (26) departing from the fifth connecting rod (25) is fixedly connected with the driving device (27); the rocker mechanism formed among the first connecting rod (21), the second connecting rod (22), the third connecting rod (23), the fourth connecting rod (24), the fifth connecting rod (25), the sixth connecting rod (26), the pull rod (5) and the rocker arms (20) can drive the two rocker arms (20) to rotate towards opposite directions respectively when the driving device (27) rotates.
3. A butterfly valve with external modified sealing according to claim 1, characterised in that said rocker mechanism (6) is a four-bar mechanism comprising a valve plate connecting frame (9), a main rocker (10), a connecting rod plate (11), an adjusting plate (12); the adjusting plate (12) is in a shape of a letter 21274, the upper end of the adjusting plate is provided with a long hole which is used for being in sliding connection with a sliding sleeve (17) of the correcting mechanism (7) and can slide left and right, the lower end turning part of the adjusting plate (12) is rotatably connected with the main rocker (10) through the valve rod (3), and the tail part of the lower end of the adjusting plate (12) is rotatably connected with the connecting rod plate (11); one end of the valve plate connecting frame (9), which is far away from the valve plate (4), is rotatably connected with one end of the connecting rod plate (11), which is far away from the adjusting plate (12), so that the adjusting plate (12) can slide left and right, and the middle of the valve plate connecting frame (9) is rotatably connected with the main rocker (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121675247.5U CN215293622U (en) | 2021-07-22 | 2021-07-22 | Butterfly valve with external correction seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121675247.5U CN215293622U (en) | 2021-07-22 | 2021-07-22 | Butterfly valve with external correction seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215293622U true CN215293622U (en) | 2021-12-24 |
Family
ID=79523950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121675247.5U Active CN215293622U (en) | 2021-07-22 | 2021-07-22 | Butterfly valve with external correction seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215293622U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458774A (en) * | 2022-02-15 | 2022-05-10 | 石家庄阀门一厂股份有限公司 | Isolation air valve |
-
2021
- 2021-07-22 CN CN202121675247.5U patent/CN215293622U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458774A (en) * | 2022-02-15 | 2022-05-10 | 石家庄阀门一厂股份有限公司 | Isolation air valve |
| CN114458774B (en) * | 2022-02-15 | 2023-12-12 | 石家庄先楚核能装备股份有限公司 | Isolation air valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215293622U (en) | Butterfly valve with external correction seal | |
| CN107191614A (en) | A kind of forced seal ball valve with scroll spring arrangement of clutch | |
| CN105422900A (en) | Ball valve with non-contact valve ball and valve seats during rotation | |
| CN106678378A (en) | Intermittent drive non-abrasion hard sealed butterfly valve | |
| CN204533566U (en) | Four eccentric two-way seal butterfly valves | |
| CN104633142A (en) | Four-eccentricity double-way sealing butterfly valve | |
| CN113251168B (en) | Fine actuator and valve | |
| CN108825810B (en) | Adjustable three-eccentric one-way valve seat track ball valve and working method thereof | |
| CN201050606Y (en) | Pilot type high pressure butterfly valve | |
| CN210240584U (en) | Butterfly valve | |
| CN114635973A (en) | Main steam high-temperature high-pressure valve seat-replaceable stop valve | |
| CN211449842U (en) | Self-locking type filtering ball valve | |
| CN212360804U (en) | Low-torque pressure sealing stop valve | |
| CN208793650U (en) | It is a kind of to prevent stuck butterfly valve | |
| CN114658865A (en) | Anti-blocking low-torque guide stop valve | |
| CN220286491U (en) | Electric intelligent ball valve | |
| CN219159551U (en) | Hard sealing butterfly valve using U-shaped valve seat | |
| CN114060545A (en) | Vacuum gate valve with antidetonation function | |
| CN216789252U (en) | Double-eccentric butterfly valve suitable for limiting device with adjustable | |
| CN207064663U (en) | A kind of butterfly valve available for high pressure operating mode | |
| CN114458774B (en) | Isolation air valve | |
| CN218118627U (en) | Fault-free anti-seismic butterfly valve | |
| CN214119035U (en) | Novel soft and hard double-sealing three-way rotary cylinder angle valve of upper assembling type | |
| CN217736329U (en) | Emergency cut-off track valve | |
| CN218718885U (en) | Manual butterfly valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 050222 No.69, Shitong Road, Luquan District, Shijiazhuang City, Hebei Province Patentee after: Shijiazhuang Xianchu Nuclear Equipment Co.,Ltd. Address before: 050222 No.69, Shitong Road, Luquan District, Shijiazhuang City, Hebei Province Patentee before: SHIJIAZHUANG NO.1 VALVE FACTORY CO.,LTD. |