CN114294441A - Spherical forged steel ball valve capable of elastically resetting - Google Patents
Spherical forged steel ball valve capable of elastically resetting Download PDFInfo
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- CN114294441A CN114294441A CN202210144322.8A CN202210144322A CN114294441A CN 114294441 A CN114294441 A CN 114294441A CN 202210144322 A CN202210144322 A CN 202210144322A CN 114294441 A CN114294441 A CN 114294441A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 109
- 238000009434 installation Methods 0.000 claims abstract description 10
- 238000005192 partition Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 238000013016 damping Methods 0.000 abstract description 10
- 230000033001 locomotion Effects 0.000 abstract description 6
- 230000001174 ascending effect Effects 0.000 abstract 1
- 238000005381 potential energy Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention relates to an elastic resettable spherical forged steel ball valve, which comprises a first valve body and a second valve body, wherein connecting pieces are respectively arranged on opposite sides of the first valve body and the second valve body, the first valve body and the second valve body are detachably connected through the connecting pieces, a spherical piece is rotatably arranged on the inner sides of the first valve body and the second valve body, a through groove is formed in the spherical piece, an installation part is arranged on one side of the spherical piece, a transmission rod is fixedly arranged in the center of the installation part, a rectangular transmission part is arranged on the transmission rod, the transmission rod is slowed down when rotating in reverse direction by increasing resistance to the transmission part through a damping sleeve, the time of resetting each time is the same, so that the spherical forged steel ball valve can be automatically reset when an opening has extremely small error, and a second gear is driven to vertically descend when resetting is carried out, and under the condition of no debugging, the ascending motion state can be repeated, and the practicability is very high.
Description
Technical Field
The invention relates to the field related to valves, in particular to an elastic-resetting spherical forged steel ball valve.
Background
A ball valve is intended to be a stop valve in the marine and marine sectors, and is defined in the standard GB/T21465-2008 "valve nomenclature" as a valve in which the closure member (ball) is driven by a valve stem and rotates about the axis of the ball valve.
The hard seal V-shaped ball valve can also be used for regulating and controlling fluid, wherein a V-shaped ball core of the hard seal V-shaped ball valve and a metal valve seat of the build-up welding hard alloy have strong shearing force, and the hard seal V-shaped ball valve is particularly suitable for media containing fibers, tiny solid particles and the like. The multi-way ball valve can flexibly control the confluence, the diversion and the switching of the flow direction of the medium on the pipeline, and can close any channel to connect the other two channels. The valve of this type should be generally installed horizontally in the pipeline.
The existing ball valve needs to be closed manually, pneumatically or electrically after being opened, so that the use cost is high, in some special industries, the ball valve can be opened and closed regularly and repeatedly, the pneumatic and electric use costs are high, and the manual closing is complicated. '
The problem that the aforesaid provided provides a ball-type forged steel ball valve that can elastically reset.
Disclosure of Invention
The invention aims to provide an elastic resetting spherical forged steel ball valve to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an elastically resettable spherical forged steel ball valve comprising;
first valve body and second valve body, the connecting piece is all installed to the relative one side of first valve body and second valve body, first valve body with the second valve body passes through the connecting piece and can dismantle the connection:
the spherical piece is rotatably arranged on the inner sides of the first valve body and the second valve body, a through groove is formed in the spherical piece, an installation part is arranged on one side of the spherical piece, a transmission rod is fixedly arranged in the center of the installation part, and a rectangular transmission part is arranged on the transmission rod;
the baffle, the baffle install in first valve body with the second valve body is inboard to cut apart into first cavity and second cavity with its inboard, second cavity inboard install with the canceling release mechanical system that the transfer line is connected, first valve body with second valve body inboard still be provided with canceling release mechanical system connects elastic construction.
As a further scheme of the invention: the reset mechanism comprises a transmission part which is rotatably installed at the bottom of the first valve body partition plate, the transmission part comprises a transmission column, a bearing disc which is integrally formed with the transmission column is installed at the bottom of the transmission column, two sliding rings are sleeved on the transmission column, limiting protrusions and limiting bulges are symmetrically arranged on the inner sides of the two sliding rings, the limiting protrusions and the limiting bulges are in sliding fit with grooves formed in the outer side of the transmission column, a second spring is installed between the two sliding rings, a ratchet ring is fixedly installed at the top of the transmission part, a second pawl disc which is matched with the ratchet ring is rotatably installed on the inner side of the ratchet ring, and a rotating shaft of the second pawl disc is connected with the transmission rod through a first transmission belt;
the lifting structure is installed to the bottom of the bearing plate, the lifting structure with install one-way transmission structural connection on the installation department, one-way transmission structural connection the transfer line.
As a further scheme of the invention: the lifting structure comprises a threaded rod fixedly installed at the bottom of the bearing plate, a second gear in threaded fit with the pawl plate is sleeved on the outer side of the pawl plate, the second gear is connected with the one-way transmission structure, and a guide structure connected with the sliding ring is installed on the second gear.
As a still further scheme of the invention: the guide structure is including seting up annular spacing groove on the second gear, the inboard slidable mounting of annular spacing groove has annular stopper, fixed mounting has the lifting piece on the annular stopper, fixed mounting has the connecting rod on the lifting piece, the connecting rod runs through accept the dish with the slip ring is fixed.
As a further scheme of the invention: the one-way transmission structure comprises a ratchet piece rotatably arranged on the mounting part, a first gear integrally formed with the ratchet piece is arranged on the outer side of the ratchet piece, and the first gear is meshed with the second gear;
a pawl disc matched with the ratchet piece is installed on the inner side of the ratchet piece, the pawl disc is rotatably installed at the bottom of the partition plate, and a rotating shaft of the pawl disc is connected with the transmission rod through a second transmission belt.
As a further scheme of the invention: the elastic structure comprises stroke limiting grooves formed in the inner sides of the first valve body and the second valve body, and arc line guide rods are fixedly mounted on the inner sides of the stroke limiting grooves;
the inner side of the stroke limiting groove is further slidably mounted with a slide, a through hole is formed in the slide block, the slide block is in sliding connection with the arc guide rod through the through hole, a first spring is sleeved on the outer side of the arc guide rod, and the slide block is fixedly connected with the transmission plate and is fixedly connected with the transmission rod.
As a further scheme of the invention: and sealing rings are arranged in the first valve body and the second valve body and are made of rubber materials.
As a further scheme of the invention: one side of the spherical part far away from the transmission rod is provided with a limiting rod which is integrally formed, and the limiting rod is rotatably connected with a limiting ring groove arranged on the first valve body and the second valve body.
Compared with the prior art, the invention has the beneficial effects that: the invention can drive the spherical element to rotate ninety degrees when the transmission rod is rotated through the rectangular wrench so as to be in a communicated state, the resistance is increased to the transmission piece through the damping sleeve during rotation so that the transmission rod moves slowly when rotating reversely, and the time for resetting is the same each time, so that the spherical element automatically resets when the opening is opened within the time with extremely small error;
secondly, order about the second gear and erect the decline when reseing, under the condition that need not the debugging, the motion state that can rise repeatedly, the practicality is very high.
Drawings
Fig. 1 is a schematic structural diagram of an elastically resettable ball-type forged steel ball valve.
Fig. 2 is a cross-sectional view of fig. 1.
Fig. 3 is an exploded view of fig. 1.
Fig. 4 is an enlarged view of a portion of a structure shown in fig. 3.
Fig. 5 is a schematic structural view of the interior of the first valve body and the second valve body in the elastically resettable ball-type forged steel ball valve.
Fig. 6 is an enlarged view of a portion B of fig. 5.
Fig. 7 is a schematic structural view of a ratchet member in a ball-type forged steel ball valve capable of elastically resetting.
FIG. 8 is a schematic structural diagram of a first valve body in an elastically resettable ball-type forged steel ball valve
In the figure: 1. a first valve body; 2. a second valve body; 3. a transmission rod; 4. a rectangular transmission part; 5. a connecting member; 6. a first cavity; 7. a second cavity; 8. a spherical member; 9. a through groove; 10. a seal ring; 11. a drive plate; 12. a first spring; 13. a first drive belt; 14. a first gear; 15. a ratchet member; 16. a second belt; 17. a slip ring; 18. a limiting bulge; 19. a second spring; 20. a transmission member; 21. a groove; 22. a second gear; 23. a lifting member; 24. a threaded rod; 25. a pawl plate; 26. a stroke limiting groove; 27. an arc guide rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, an element of the present invention may be said to be "fixed" or "disposed" to another element, either directly on the other element or with intervening elements present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Referring to fig. 1-8, in an embodiment of the present invention, an elastically resettable ball-type forged steel ball valve includes;
the spherical piece 8 is rotatably installed on the inner sides of the first valve body 1 and the second valve body 2, a through groove 9 is formed in the spherical piece 8, an installation part is arranged on one side of the spherical piece 8, a transmission rod 3 is fixedly installed in the center of the installation part, and a rectangular transmission part 4 is arranged on the transmission rod 3;
the partition plate is arranged on the inner sides of the first valve body 1 and the second valve body 2 and divides the inner sides of the first valve body and the second valve body into a first cavity 6 and a second cavity 7, a reset mechanism connected with the transmission rod 3 is arranged on the inner side of the second cavity 7, and elastic structures connected with the reset mechanism are further arranged on the inner sides of the first valve body 1 and the second valve body 2;
the reset mechanism comprises a transmission part 20 which is rotatably arranged at the bottom of the partition plate of the first valve body 1, the transmission part 20 comprises a transmission column, the bottom of the transmission column is provided with a bearing disc which is integrally formed, the transmission column is sleeved with two sliding rings 17, the inner sides of the two sliding rings 17 are symmetrically provided with limiting bulges 18, the limiting bulges 18 are in sliding fit with grooves 21 which are arranged at the outer sides of the transmission column, a second spring 19 is arranged between the two sliding rings 17, the top of the transmission part 20 is fixedly provided with a ratchet ring, the inner side of the ratchet ring is rotatably provided with a second ratchet disc which is matched with the ratchet ring, and a rotating shaft of the second ratchet disc is connected with the transmission rod 3 through a first transmission belt 13;
a lifting structure is mounted at the bottom of the bearing disc, the lifting structure is connected with a one-way transmission structure mounted on the mounting part, and the one-way transmission structure is connected with the transmission rod 3, please refer to fig. 2-6;
the lifting structure comprises a threaded rod 24 fixedly installed at the bottom of the bearing disc, a second gear 22 in threaded fit with the pawl disc 25 is sleeved on the outer side of the pawl disc 25, the second gear 22 is connected with the one-way transmission structure, and a guide structure connected with the sliding ring 17 is installed on the second gear 22, please refer to fig. 5 and 6;
the guide structure comprises an annular limiting groove formed in the second gear 22, an annular limiting block is slidably mounted on the inner side of the annular limiting groove, a lifting piece 23 is fixedly mounted on the annular limiting block, a connecting rod is fixedly mounted on the lifting piece 23, and the connecting rod penetrates through the bearing disc and is fixed with the sliding ring 17, please refer to fig. 4;
wherein, the limit groove and the limit block are arranged in an annular T shape, the connecting rod is fixedly connected with a sliding ring 17 passing through one side of the bearing disc
It should be noted that the guide structure is connected to a single sliding ring 17 facing the tray;
the one-way transmission structure comprises a ratchet member 15 rotatably mounted on the mounting part, a first gear 14 integrally formed with the ratchet member 15 is mounted on the outer side of the ratchet member 15, and the first gear 14 is meshed with the second gear 22;
a pawl disc 25 matched with the ratchet member 15 is installed on the inner side of the ratchet member 15, the pawl disc 25 is rotatably installed at the bottom of the partition plate, and a rotating shaft of the pawl disc 25 is connected with the transmission rod 3 through a second transmission belt 16, please refer to fig. 4 and 7;
it should be noted that the pawl disc 25 includes a disc body, the disc body is provided with a plurality of movable grooves which are distributed in a single or circumferential equidistant manner, the inner sides of the movable grooves are hinged with pawls, and the hinged parts of the pawls are provided with torsion springs; the first gear 14 is a wide gear so as not to be disengaged therefrom when the second gear 22 is vertically moved;
wherein, the single sliding ring 17 close to one side of the clapboard is a damping sleeve, and the second spring 19 is driven to compress through the lifting structure so as to apply pressure to the damping sleeve;
it should be noted that the ratchet ring and the second ratchet plate in the embodiment of the present disclosure are not disassembled;
the elastic structure comprises a stroke limiting groove 26 arranged on the inner sides of the first valve body 1 and the second valve body 2, and an arc wire guide rod 27 is fixedly arranged on the inner side of the stroke limiting groove 26;
the inner side of the stroke limiting groove 26 is further slidably mounted with a slide, the slide block is provided with a through hole, the slide block is slidably connected with the arc guide rod 27 through the through hole, the outer side of the arc guide rod 27 is sleeved with a first spring 12, the slide block is fixedly connected with the transmission rod 3 through the transmission plate 11 fixedly connected with the slide block, please refer to fig. 2 and 8;
wherein the slider and the stroke limiting groove 26 are both arranged in a T shape, and the first spring 12 is in a slightly stretched state in a normal state;
the stroke limiting groove 26 is formed in a non-circular shape, and the angle of the stroke limiting groove is ninety degrees of the rotation of the transmission rod 3, so that the sliding block and the transmission plate 11 limit the motion stroke of the transmission rod.
A limiting rod integrally formed with the spherical member 8 is mounted on one side of the spherical member 8 away from the transmission rod 3, and the limiting rod is rotatably connected with limiting ring grooves formed in the first valve body 1 and the second valve body 2, please refer to fig. 2;
wherein, the gag lever post includes the body of rod, a plurality ofly and an integrated into one piece fashioned spacing ring are installed to body of rod outside equidistance, the spacing ring with spacing annular rotates to mutually support through two then and carry out spacingly to spherical component 8.
In the practical application of the invention, the rectangular transmission part 4 is screwed through the rectangular plate to drive the transmission rod 3 to rotate, the transmission rod 3 is driven to rotate along with the rotation when the transmission rod 3 rotates, and the transmission plate 11 drives the sliding block to rotate along with the rotation so as to pull up the first spring 12 through the sliding block, so that the first spring 12 stores certain elastic potential energy, the rotation angle of the transmission rod 3 is carried out through the movement stroke of the sliding block, and the limit angle is ninety degrees; the through groove 9 is communicated with the first valve body 1 and the second valve body 2 when the spherical member 8 rotates ninety degrees along with the transmission rod 3;
when the transmission rod 3 rotates, the pawl disc 25 is driven to rotate through the second transmission belt 16, when the pawl disc 25 rotates, the first gear 14 is driven to rotate, so that the second gear 22 is driven to rotate through the first gear 14, when the second gear 22 rotates, the threaded rod 24 is in threaded fit to vertically ascend, so that the lifting piece 23 drives the sliding ring 17 close to the bearing disc to vertically ascend, and therefore the second spring 19 is compressed, and the elastic potential energy during compression exerts a counterforce on the damping sleeve to enable the damping sleeve to be abutted against the rotating shaft of the transmission piece 20, so that the friction force between the damping sleeve and the rotating shaft is increased;
when the transmission rod 3 rotates, the transmission part 20 cannot be driven to rotate under the existence of the second pawl disc and the ratchet ring, when the force for driving the transmission rod 3 disappears, the stored elastic potential energy of the first spring 12 drives the sliding block and the transmission plate 11 to move in the opposite direction, so that the transmission rod 3 is driven to rotate in the opposite direction, and when the transmission rod 3 rotates in the opposite direction, the second pawl disc drives the pawl disc to rotate so as to drive the transmission part 20 to rotate, the rotating speed of the transmission part 20 is full under the current damping sleeve, so that the rotating direction of the transmission rod 3 is equally slowed, and the spherical part 8 can be reset very slowly after rotating ninety degrees;
when the transmission member 20 rotates, the transmission member drives the threaded rod 24 to rotate, so that the threaded rod 24 is driven to gradually descend, the resistance of the damping sleeve is stronger when the transmission member 20 just rotates, the resistance is gradually reduced along with time, the first gear 14 does not rotate at the moment, and the transmission relationship with the ratchet member 15 does not occur when the transmission rod 3 rotates reversely;
in conclusion, the present invention can drive the spherical element 8 to rotate ninety degrees when the transmission rod 3 is rotated by the rectangular wrench so as to be in a communication state, increase the resistance to the transmission member 20 by the damping sleeve during rotation so as to slow down the movement of the transmission rod 3 during reverse rotation, and the time for resetting each time is the same, so that the opening is automatically reset within a time when the error is minimal;
secondly, order to order about second gear 22 and erect the decline when reseing, under the condition that need not the debugging, the repeatable rising motion state, the practicality is very high.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. An elastic resettable spherical forged steel ball valve is characterized by comprising;
first valve body (1) and second valve body (2), connecting piece (5) are all installed to one side relative in first valve body (1) and second valve body (2), first valve body (1) with second valve body (2) can dismantle the connection through connecting piece (5):
the spherical piece (8) is rotatably installed on the inner sides of the first valve body (1) and the second valve body (2), a through groove (9) is formed in the spherical piece (8), an installation part is arranged on one side of the spherical piece (8), a transmission rod (3) is fixedly installed in the center of the installation part, and a rectangular transmission part (4) is arranged on the transmission rod (3);
the baffle, the baffle install in first valve body (1) with second valve body (2) are inboard to split into first cavity (6) and second cavity (7) with its inboard, second cavity (7) inboard install with the canceling release mechanical system that transfer line (3) are connected, first valve body (1) with second valve body (2) inboard still be provided with the elastic construction is connected to the canceling release mechanical system.
2. A resiliently resettable ball-type forged steel ball valve according to claim 1, the reset mechanism comprises a transmission piece (20) which is rotatably arranged at the bottom of the clapboard of the first valve body (1), the transmission part (20) comprises a transmission column, the bottom of the transmission column is provided with a bearing disc which is integrally formed with the transmission column, two sliding rings (17) are sleeved on the transmission column, limiting bulges (18) are symmetrically arranged on the inner sides of the two sliding rings (17), the limiting bulge (18) of the limiting bulge is in sliding fit with a groove (21) arranged on the outer side of the transmission column, a second spring (19) is arranged between the two sliding rings (17), a ratchet ring is fixedly arranged at the top of the transmission piece (20), a second ratchet disc matched with the ratchet ring is rotatably arranged at the inner side of the ratchet ring, the rotating shaft of the second pawl disc is connected with the transmission rod (3) through a first transmission belt (13);
the lifting structure is installed to the bottom of the bearing plate, the lifting structure is connected with the one-way transmission structure on the installation part, and the one-way transmission structure is connected with the transmission rod (3).
3. The ball-type forged steel ball valve capable of being elastically restored according to claim 2, wherein the lifting structure comprises a threaded rod (24) fixedly installed at the bottom of the bearing disc, a second gear (22) in threaded fit with the pawl disc (25) is sleeved outside the pawl disc (25), the second gear (22) is connected with the one-way transmission structure, and a guide structure connected with the sliding ring (17) is installed on the second gear (22).
4. The ball-type forged steel ball valve capable of elastic resetting according to claim 3, wherein the guiding structure comprises an annular limiting groove formed on the second gear (22), an annular limiting block is slidably mounted inside the annular limiting groove, a lifting member (23) is fixedly mounted on the annular limiting block, a connecting rod is fixedly mounted on the lifting member (23), and the connecting rod penetrates through the bearing disc and is fixed with the sliding ring (17).
5. A ball-type forged steel ball valve capable of being elastically restored according to claim 2, wherein said one-way transmission structure comprises a ratchet member (15) rotatably installed on said mounting portion, a first gear (14) integrally formed with said ratchet member (15) is installed outside said ratchet member (15), and said first gear (14) is engaged with said second gear (22);
a pawl disc (25) matched with the ratchet piece (15) is installed on the inner side of the ratchet piece, the pawl disc (25) is rotatably installed at the bottom of the partition plate, and a rotating shaft of the pawl disc (25) is connected with the transmission rod (3) through a second transmission belt (16).
6. A ball-type forged steel ball valve capable of being elastically restored according to claim 1, wherein said elastic structure comprises a stroke limiting groove (26) opened inside said first valve body (1) and said second valve body (2), and a curved line guide rod (27) is fixedly installed inside said stroke limiting groove (26);
the inner side of the stroke limiting groove (26) is further slidably mounted with a slide, a through hole is formed in the slide block, the slide block passes through the through hole and is in sliding connection with the arc guide rod (27), a first spring (12) is sleeved on the outer side of the arc guide rod (27), and the slide block is fixedly connected with the transmission plate (11) and the transmission rod (3).
7. An elastically resettable ball-type forged steel ball valve according to claim 2, wherein a sealing ring (10) is mounted in each of the first valve body (1) and the second valve body (2), the sealing ring (10) being made of rubber material.
8. A ball-type forged steel ball valve which is elastically resettable in accordance with claim 2, wherein a stopper rod is integrally formed with the side of the spherical member (8) remote from the transmission rod (3), and the stopper rod is rotatably connected to stopper ring grooves formed in the first valve body (1) and the second valve body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210144322.8A CN114294441A (en) | 2022-02-17 | 2022-02-17 | Spherical forged steel ball valve capable of elastically resetting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210144322.8A CN114294441A (en) | 2022-02-17 | 2022-02-17 | Spherical forged steel ball valve capable of elastically resetting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114294441A true CN114294441A (en) | 2022-04-08 |
Family
ID=80978422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210144322.8A Pending CN114294441A (en) | 2022-02-17 | 2022-02-17 | Spherical forged steel ball valve capable of elastically resetting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114294441A (en) |
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2022
- 2022-02-17 CN CN202210144322.8A patent/CN114294441A/en active Pending
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Application publication date: 20220408 |
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