CN215487667U - Electromagnetic pulse valve with valve motion state monitoring device - Google Patents
Electromagnetic pulse valve with valve motion state monitoring device Download PDFInfo
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- CN215487667U CN215487667U CN202121391865.7U CN202121391865U CN215487667U CN 215487667 U CN215487667 U CN 215487667U CN 202121391865 U CN202121391865 U CN 202121391865U CN 215487667 U CN215487667 U CN 215487667U
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 47
- 238000012544 monitoring process Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 17
- 239000004020 conductor Substances 0.000 claims description 11
- 238000002955 isolation Methods 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000005253 cladding Methods 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000000428 dust Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Indication Of The Valve Opening Or Closing Status (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The utility model relates to the technical field of monitoring of the motion state of a valve of an electromagnetic pulse valve, in particular to an electromagnetic pulse valve with a valve motion state monitoring device. By adopting the structure, the monitoring device for monitoring the motion state of the valve is arranged on the large valve cover, the motion state of the large valve is fed back by adopting a mechanical mode through an electric signal, the monitoring is not interfered by the outside, the monitoring is sensitive, stable and reliable, and the service life is longer, so that the motion state of the valve can be sensitively monitored by the monitoring device when the electromagnetic pulse valve works, and the service life of the monitoring device is longer.
Description
Technical Field
The utility model relates to the technical field of monitoring of the motion state of a valve of an electromagnetic pulse valve, in particular to an electromagnetic pulse valve with a valve motion state monitoring device.
Background
The electromagnetic pulse valve is a key part for cleaning dust of the pulse bag type dust collector, and whether the electromagnetic pulse valve works normally or not directly influences the dust cleaning effect and the continuous working capacity of the pulse bag type dust collector. The electromagnetic pulse valve is particularly important for monitoring the operation condition of the valve in the operation process, particularly for monitoring the opening state, the closing state and the opening and closing speed state of the valve, can ensure that the electromagnetic pulse valve works under a better working condition, and can effectively exert the working performance and the service life of the electromagnetic pulse valve.
Under the general condition, monitoring devices are arranged on valve covers of electromagnetic pulse valves, the running states of the valves are monitored by sensing the positions of the valves through ultrasonic waves or magnetic fields, the valves only need to move within the detection distances of the monitoring devices, the detection distances of the monitoring devices are related to detected object materials, the detection distances of the monitoring devices for the electromagnetic pulse valves are small due to the characteristics of the valve materials, therefore, the monitoring data of the monitoring devices are inaccurate, certain electromagnetic fields exist in the working environments of the electromagnetic pulse valves, the valves can impact and shake the monitoring devices in the moving process, and the service lives of the monitoring devices are greatly shortened in long-time use.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the present invention provides an electromagnetic pulse valve with a valve motion state monitoring device, which can monitor the motion state of the valve sensitively when the electromagnetic pulse valve works, and can also make the monitoring device have a longer service life.
In order to achieve the purpose, the technical scheme applied by the utility model is as follows:
the utility model provides an electromagnetic pulse valve with valve motion state monitoring devices, includes valve body, disk seat, big valve gap, little valve gap and elder generation conductor, and the valve body sets up on the disk seat, and big valve gap installs on the valve body, and little valve gap installs on big valve gap, and the guide's body is installed on little valve gap, installs the monitoring devices who is used for monitoring valve motion state on the big valve gap.
According to the scheme, the valve seat is provided with a first air hole for externally connecting a dust collector air bag, the large diaphragm is installed between the large valve cover and the valve body, the large diaphragm is provided with the large valve, the large spring is arranged between the large valve and the large valve cover, the large valve corresponds to the first air hole, and the monitoring device is driven to be opened and closed through the large valve.
According to the scheme, a cavity with an opening facing the big valve is arranged on the big valve cover above the big valve, the monitoring device is arranged in the cavity and comprises a shell, an isolation diaphragm for dividing the cavity in the shell into an upper cavity and a lower cavity is arranged in the shell, the bottom of the isolation diaphragm is abutted with a contact rod, a round through hole is arranged on the shell, one end of the contact rod passes through the round through hole and extends out of the opening of the cavity to be arranged corresponding to the big valve, a first current conducting plate is arranged on the isolation diaphragm, a second current conducting plate is arranged on the inner wall of the shell above the first current conducting plate and is arranged corresponding to the first current conducting plate, a small hole communicated with the outside is arranged at the bottom of the cavity, a sealing element for preventing gas in the upper cavity from leaking to the outside is arranged in the small hole, a lead assembly which passes through the sealing element and is externally connected with a pulse controller is arranged in the sealing element, and is electrically connected with the first current conducting plate through the lead assembly, the wire assembly is electrically connected with the second conductive plate through the second wire.
According to the scheme, a spring is arranged between the first conducting plate and the bottom of the cavity.
According to the scheme, the opening of the cavity is provided with the clamping groove, and the clamping spring for fixedly clamping the shell is arranged in the clamping groove.
According to the scheme, a second sealing ring for preventing gas leakage is arranged between the shell and the bottom of the cavity.
According to the scheme, a first sealing ring for preventing gas leakage is arranged between the feeler lever and the inner wall of the circular through hole.
According to the scheme, the boss is arranged in the shell, and the isolation diaphragm is pressed on the boss through the pressing plate.
According to the scheme, a first cavity is arranged between the large diaphragm and the large valve cover, a first perforation which can enable the first cavity to be communicated with the first air hole is arranged on the large diaphragm, a second air hole and a third air hole are arranged on the large valve cover, one end of the second air hole is communicated with the first cavity, the other end of the second air hole is communicated with the third air hole, the third air hole is communicated with the outside, a small diaphragm is arranged between the large valve cover and the small valve cover, a small valve is arranged on the small diaphragm, a small spring is arranged between the small valve and the small valve cover, the small valve is correspondingly arranged at the communication part of the second air hole and the third air hole, a second cavity is arranged between the small diaphragm and the small valve cover, a second perforation which can enable the second cavity to be communicated with the first cavity is arranged on the small diaphragm, a fourth air hole and a fifth air hole are arranged on the small valve cover, one end of the fourth air hole is communicated with the second cavity, the other end of the fourth air hole is communicated with the fifth air hole, the fifth air hole is communicated with the outside, a movable iron core which can move up and down is arranged in the pilot body, the first conductor is wrapped with a coil, and the communication part of the pilot body and the air hole four and the air hole five is correspondingly arranged.
The utility model has the beneficial effects that:
the utility model adopts the structure, the monitoring device for monitoring the motion state of the valve is arranged on the large valve cover, the motion state of the large valve is fed back by an electric signal in a mechanical mode, the monitoring is not interfered by the outside, the monitoring is sensitive, stable and reliable, the service life is longer, the monitoring device can sensitively monitor the motion state of the valve when the electromagnetic pulse valve works, and the service life of the monitoring device can be longer.
Drawings
FIG. 1 is a sectional view of an electromagnetic pulse valve according to one embodiment of the present invention;
FIG. 2 is an enlarged view of the location A in FIG. 1;
FIG. 3 is a view showing the structure of a monitoring apparatus according to a second embodiment;
FIG. 4 is an assembly view of the monitoring device and the bottom surface of the large valve cover according to the second embodiment;
fig. 5 is an assembly view of the monitoring device and the top surface of the large valve cover in the second embodiment.
1. A valve body; 2. a large valve cover; 3. a large valve; 4. a large membrane; 5. a large spring; 6. a small valve cover; 7. a small membrane; 8. a small valve; 9. a small spring; 10. firstly, a conductor; 11. a coil; 12. a cavity; 13. a card slot; 14. a circular through hole; 15. a small hole; 16. a valve seat; 17. a first air hole; 18. a second air hole; 19. a third air hole; 20. a fourth air hole; 21. a housing; 22. a feeler lever; 23. an isolation diaphragm; 24. a first conductive plate; 25. a second conductive plate; 26. pressing a plate; 27. a spring; 28. a clamp spring; 29. a first sealing ring; 30. a second sealing ring; 31. a seal member; 32. a wire assembly; 321. a first lead; 322. a second conducting wire; 40. a fifth air hole; 41. a first cavity; 42. a second cavity; 51. punching a first hole; 52. punching a second hole; 61. an external thread;
Detailed Description
The technical solution of the present invention is described below with reference to the accompanying drawings and examples.
The first embodiment is as follows:
as shown in fig. 1 and 2, the electromagnetic pulse valve with a valve motion state monitoring device according to the present invention includes a valve body 1, a valve seat 16, a large valve cover 2, a small valve cover 6, and a first conductor 10, wherein the valve body 1 is disposed on the valve seat 16, the large valve cover 2 is mounted on the valve body 1, the small valve cover 6 is mounted on the large valve cover 2, the pilot body 10 is mounted on the small valve cover 6, and the large valve cover 2 is mounted with a monitoring device for monitoring a valve motion state. The above constitutes the basic structure of the present invention.
By adopting the structure, the monitoring device for monitoring the motion state of the valve is arranged on the large valve cover 2, so that the monitoring device can sensitively monitor the motion state of the valve when the electromagnetic pulse valve works, and the monitoring device has longer service life.
In this embodiment, be equipped with the gas pocket 17 that is used for external dust remover gas bag on the disk seat 16, install big diaphragm 4 between big valve gap 2 and the valve body 1, be equipped with big valve 3 on the big diaphragm 4, be equipped with big spring 5 between big valve 3 and the big valve gap 2, big valve 3 corresponds the setting with gas pocket 17, and monitoring devices opens and close through big valve 3 drive.
When the electromagnetic pulse valve works, the large diaphragm 4 drives the large valve 3 to move up and down through the pressure difference acting on the large diaphragm, so that the large diaphragm can be used for controlling the on-off of the air hole I17 and driving the monitoring device to be opened and closed.
When the electromagnetic pulse valve does not work, the big spring 5 pushes the big valve 3 to reset by utilizing the self rebound force, and blocks the first air hole 17 again.
In this embodiment, a cavity 12 with an opening facing the large valve 3 is disposed on the large valve cover 2 above the large valve 3, the monitoring device is installed in the cavity 12, the monitoring device includes a housing 21, an isolating diaphragm 23 for separating the cavity in the housing 21 into an upper cavity and a lower cavity is disposed in the housing 21, a contact rod 22 is abutted to the bottom of the isolating diaphragm 23, a circular through hole 14 is disposed on the housing 21, one end of the contact rod 22 passes through the circular through hole 14 and extends out of the opening of the cavity 12 to be disposed corresponding to the large valve 3, a first conductive plate 24 is mounted on the isolating diaphragm 23, a second conductive plate 25 is mounted on the inner wall of the housing 21 above the first conductive plate 24, the first conductive plate 24 and the second conductive plate 25 are disposed corresponding to each other, a small hole 15 communicated with the outside is disposed at the bottom of the cavity 12, a sealing member 31 for preventing the gas in the upper cavity from leaking to the outside is disposed in the small hole 15, a lead assembly 32 passing through the sealing member 31 and externally connected to the pulse controller is disposed in the sealing member 31, wire assembly 32 is electrically connected to conductor plate one 24 via wire one 321, and wire assembly 32 is electrically connected to conductor plate two 25 via wire two 332. The motion state of the large valve 3 is fed back through an electric signal in a mechanical mode, monitoring is not interfered by the outside, monitoring is sensitive, stable and reliable, and the service life is longer.
The isolating diaphragm 23 separates the cavity in the housing 21 into an upper cavity and a lower cavity, so that gas in the lower cavity cannot leak into the upper cavity with a circuit structure, and the safety is effectively improved.
Wherein the isolation diaphragm 23 and the first conductive plate 24 are fixed as a whole, so that the structure is simplified.
In an initial state, the first conductive plate 24 and the second conductive plate 25 are arranged at an interval, the interval distance is set to be H, one end of the contact rod 22 penetrates through the circular through hole 14 and extends out of the cavity 12, the extending distance is set to be L, it should be noted that the length of L is larger than H, so that when the electromagnetic pulse valve works, the first conductive plate 24 and the second conductive plate 25 can be electrically connected to form a loop to generate an electric signal by the action of the large diaphragm 4 when the large valve 3 opens the air hole 17, and the contact rod 22 is pushed to move upwards, so that the opening movement state of the large valve 3 is fed back.
In this embodiment, a spring 27 is disposed between the first conductive plate 24 and the bottom of the cavity 12.
The spring 27 is used for resetting the first conductive plate 24 by using the resilience of the spring 27 when the electromagnetic pulse valve does not work, so that a loop is formed between the first conductive plate 24 and the second conductive plate 25 and is disconnected, the electric signal disappears, and the closed motion state of the large valve 3 is fed back.
It should be noted that the spring 27 can ensure that the feeler lever 22 can return to the initial position after each operation, and can monitor the movement state of the large valve 3 in the next operation, and meanwhile, the spring 27 can also make the feeler lever 22 always extend out of the cavity 12 when the feeler lever 22 does not operate, so as to effectively prevent the feeler lever 22 from moving upwards under the pressure of the working gas to make the first conductive plate 24 contact with the second conductive plate 25 to generate an electrical signal, thereby generating a false alarm.
In this embodiment, a clamping groove 13 is disposed at an opening of the cavity 12, and a clamping spring 28 for fixedly clamping the housing 21 is disposed in the clamping groove 13.
The shell 21 is clamped by the elastic force of the clamp spring 28, so that the shell 21 cannot fall off the cavity 12, and the installation is convenient and reliable.
In this embodiment, a second sealing ring 30 for preventing gas leakage is arranged between the housing 21 and the bottom of the cavity 12.
In this embodiment, a first sealing ring 29 for preventing gas leakage is arranged between the feeler lever 22 and the inner wall of the circular through hole 14.
In this embodiment, a boss is provided in the housing 21, and the isolation diaphragm 23 is pressed against the boss by the pressing plate 26.
The pressing plate 26 is used to clamp two ends of the isolation diaphragm 23 on the boss for limiting, so that the isolation diaphragm 23 divides the cavity in the housing 21 into an upper cavity and a lower cavity which are not communicated with each other.
In this embodiment, a first cavity 41 is disposed between the large diaphragm 4 and the large valve cap 2, a first through hole 51 for communicating the first cavity 41 with the first air hole 17 is disposed on the large diaphragm 4, a second air hole 18 and a third air hole 19 are disposed on the large valve cap 2, one end of the second air hole 18 is communicated with the first cavity 41, the other end of the second air hole 18 is communicated with the third air hole 19, the third air hole 19 is communicated with the outside, a small diaphragm 7 is disposed between the large valve cap 2 and the small valve cap 6, a small valve 8 is disposed on the small diaphragm 7, a small spring 9 is disposed between the small valve 8 and the small valve cap 6, the communication position between the small valve 8 and the second air hole 18 and the third air hole 19 is correspondingly disposed, a second cavity 42 is disposed between the small diaphragm 7 and the small valve cap 6, a second through hole 52 for communicating the second cavity 42 with the first cavity 41 is disposed on the small diaphragm 7, a fourth cavity 20 and a fifth air hole 40 are disposed on the small valve cap 6, one end of the fourth air hole 20 is communicated with the second cavity 42, the other end of the air hole four 20 is communicated with the air hole five 40, the air hole five 40 is communicated with the outside, the pilot body 10 is internally provided with an iron core which can move up and down, the pilot body 10 is coated with the coil 11, and the pilot body 10 is correspondingly arranged with the communicated part of the air hole four 20 and the air hole five 40.
The small diaphragm 7 is used for driving the small valve 8 to move up and down, so that the connection and disconnection of the communication part of the air hole II 18 and the air hole III 19 are controlled, and the connection and disconnection between the cavity I41 and the cavity II 42 are controlled.
When the movable iron core in the pilot body 10 moves up and down, the movable iron core is used for controlling the connection and disconnection of the connection part of the air hole four 20 and the air hole five 40, and further controlling the connection and disconnection between the cavity two 42 and the outside.
The working principle of the utility model is that the movement state of the large valve 3 is sensed through the touch rod 22, when the large valve 3 touches the touch rod 22, the touch rod 22 moves to enable the first conductive plate 24 to touch the second conductive plate 25, so that a loop is formed to generate an electric signal, the generation and existence of the electric signal reflect the movement state of the large valve 3 for opening, when the large valve 3 is closed, the large valve 3 leaves the touch rod and is reset under the action of the spring 27, at the moment, the first conductive plate 24 is separated from the second conductive plate 25, the loop is disconnected, the electric signal disappears, and the movement state of the large valve 3 for closing is reflected.
Example two:
as shown in fig. 3 to 5, the upper end of the housing 21 is provided with an external thread 61, the top surface of the large valve cap 2 is provided with a through hole through which the upper end of the housing 21 can conveniently penetrate, after the upper end of the housing 21 penetrates through the through hole, the upper end of the housing 21 is fixed on the top surface of the large valve cap 2 in a nut and gasket manner, the lower end of the housing 21 is provided with a flat position 62, and the bottom surface of the large valve cap 2 is provided with a notch 63 which is clamped corresponding to the flat position 62, so that the lower end of the housing 21 is fixed on the bottom surface of the large valve cap 2.
While the embodiments of the present invention have been described, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make various modifications without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (9)
1. An electromagnetic pulse valve with a valve motion state monitoring device is characterized in that: including valve body (1), disk seat (16), big valve gap (2), little valve gap (6) and first conductor (10), valve body (1) sets up on disk seat (16), install on valve body (1) big valve gap (2), install on big valve gap (2) little valve gap (6), install on little valve gap (6) conductor (10) earlier, install the monitoring devices who is used for monitoring valve motion state on big valve gap (2).
2. An electromagnetic pulse valve having a valve motion state monitoring device according to claim 1, wherein: be equipped with gas pocket (17) on disk seat (16), install big diaphragm (4) between big valve gap (2) and valve body (1), be equipped with big valve (3) on big diaphragm (4), be equipped with big spring (5) between big valve (3) and big valve gap (2), big valve (3) correspond the setting with gas pocket (17), monitoring devices opens and close through big valve (3) drive.
3. An electromagnetic pulse valve having a valve motion state monitoring device according to claim 2, wherein: be equipped with cavity (12) of opening orientation big valve (3) on big valve gap (2) of big valve (3) top, monitoring devices installs in cavity (12), monitoring devices includes casing (21), be equipped with in casing (21) and be used for separating into cavity in casing (21) cavity and lower cavity's isolating diaphragm (23), isolating diaphragm (23) bottom is contradicted and is had feeler lever (22), be equipped with round through-hole (14) on casing (21), round through-hole (14) are passed to the one end of feeler lever (22) to correspond the setting with big valve (3) after stretching out the opening of cavity (12), install current conducting plate (24) on isolating diaphragm (23), install current conducting plate two (25) on the casing (21) inner wall of current conducting plate (24) top, current conducting plate (24) correspond the setting with current conducting plate (25), the bottom of the cavity (12) is provided with a small hole (15) communicated with the outside, a sealing element (31) for preventing gas in the upper cavity from leaking to the outside is arranged in the small hole (15), a lead assembly (32) penetrating through the sealing element (31) and externally connected with a pulse controller is arranged in the sealing element (31), the lead assembly (32) is electrically connected with the first current-conducting plate (24) through a first lead (321), and the lead assembly (32) is electrically connected with the second current-conducting plate (25) through a second lead (332).
4. A solenoid pulse valve having a valve motion state monitoring device according to claim 3, wherein: and a spring (27) is arranged between the first conductive plate (24) and the bottom of the cavity (12).
5. A solenoid pulse valve having a valve motion state monitoring device according to claim 3, wherein: a clamping groove (13) is formed in an opening of the cavity (12), and a clamping spring (28) used for fixedly clamping the shell (21) is arranged in the clamping groove (13).
6. A solenoid pulse valve having a valve motion state monitoring device according to claim 3, wherein: and a second sealing ring (30) for preventing gas leakage is arranged between the shell (21) and the bottom of the cavity (12).
7. A solenoid pulse valve having a valve motion state monitoring device according to claim 3, wherein: and a first sealing ring (29) for preventing gas leakage is arranged between the feeler lever (22) and the inner wall of the circular through hole (14).
8. A solenoid pulse valve having a valve motion state monitoring device according to claim 3, wherein: a boss is arranged in the shell (21), and the isolation diaphragm (23) is pressed on the boss through a pressing plate (26).
9. An electromagnetic pulse valve having a valve motion state monitoring device according to claim 2, wherein: a first cavity (41) is arranged between the large diaphragm (4) and the large valve cover (2), a first perforation (51) which can enable the first cavity (41) to be communicated with the first air hole (17) is arranged on the large diaphragm (4), a second air hole (18) and a third air hole (19) are arranged on the large valve cover (2), one end of the second air hole (18) is communicated with the first cavity (41), the other end of the second air hole (18) is communicated with the third air hole (19), the third air hole (19) is communicated with the outside, a small diaphragm (7) is arranged between the large valve cover (2) and the small valve cover (6), a small valve (8) is arranged on the small diaphragm (7), a small spring (9) is arranged between the small valve (8) and the small valve cover (6), the communicated parts of the small valve (8) and the second air hole (18) and the third air hole (19) are correspondingly arranged, a second cavity (42) is arranged between the small diaphragm (7) and the small valve cover (6), be equipped with on little diaphragm (7) and make perforation two (52) that cavity two (42) and cavity one (41) are linked together, be equipped with gas pocket four (20) and gas pocket five (40) on little valve gap (6), the one end of gas pocket four (20) communicates in cavity two (42), the other end of gas pocket four (20) communicates in gas pocket five (40), gas pocket five (40) communicate in the external world, be equipped with in conductor (10) earlier and move the iron core with moving about from top to bottom, the cladding has coil (11) on conductor (10) earlier, conductor (10) earlier and the communicating department of gas pocket four (20) and gas pocket five (40) correspond the setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121391865.7U CN215487667U (en) | 2021-06-22 | 2021-06-22 | Electromagnetic pulse valve with valve motion state monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121391865.7U CN215487667U (en) | 2021-06-22 | 2021-06-22 | Electromagnetic pulse valve with valve motion state monitoring device |
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| Publication Number | Publication Date |
|---|---|
| CN215487667U true CN215487667U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121391865.7U Ceased CN215487667U (en) | 2021-06-22 | 2021-06-22 | Electromagnetic pulse valve with valve motion state monitoring device |
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| Country | Link |
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| CN (1) | CN215487667U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266678A (en) * | 2021-06-22 | 2021-08-17 | 上海袋式除尘配件有限公司 | Electromagnetic pulse valve with valve motion state monitoring device |
-
2021
- 2021-06-22 CN CN202121391865.7U patent/CN215487667U/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266678A (en) * | 2021-06-22 | 2021-08-17 | 上海袋式除尘配件有限公司 | Electromagnetic pulse valve with valve motion state monitoring device |
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Decision date of declaring invalidation: 20221101 Decision number of declaring invalidation: 58776 Granted publication date: 20220111 |
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