CN113803503B - Right-angle hydraulic control one-way valve for internet of things terminal information acquisition - Google Patents
Right-angle hydraulic control one-way valve for internet of things terminal information acquisition Download PDFInfo
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- CN113803503B CN113803503B CN202111090849.9A CN202111090849A CN113803503B CN 113803503 B CN113803503 B CN 113803503B CN 202111090849 A CN202111090849 A CN 202111090849A CN 113803503 B CN113803503 B CN 113803503B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/0033—Electrical or magnetic means using a permanent magnet, e.g. in combination with a reed relays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/0041—Electrical or magnetic means for measuring valve parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K49/00—Means in or on valves for heating or cooling
- F16K49/002—Electric heating means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Temperature-Responsive Valves (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
A right angle liquid accuse check valve for terminal information acquisition of thing networking belongs to hydraulic system technical field. The temperature control device comprises a straight valve body and a right-angle valve body which are connected in a sealing mode to form an integral right-angle valve body, wherein a left inner cavity, a middle inner cavity, a right inner cavity and a corner valve cavity are sequentially arranged in the valve body from a liquid inlet side to a liquid outlet side, a valve core is movably installed in the middle inner cavity of the valve body, a partition plate is arranged between the left inner cavity and the middle inner cavity, a central hole is formed in the valve core, a sealing ball is arranged between the central hole of the valve core and the partition plate, a plurality of through holes I are formed in the partition plate, a liquid outlet is formed in the liquid outlet end of the valve core by arranging a plurality of through holes II around the valve core, liquid outlet of the right inner cavity flows out through the corner valve cavity, an electromagnetic coil of the temperature control device is respectively wound outside the valve body at the liquid inlet end and the liquid outlet end of the right-angle valve body, a switching and temperature information acquisition module is arranged at the corresponding position in the middle of the valve body, and heating or stopping of the electromagnetic coil is controlled according to acquired information. The invention can heat the one-way valve and improve the heat transfer efficiency.
Description
Technical Field
The invention belongs to the technical field of hydraulic systems, and particularly relates to a right-angle hydraulic control one-way valve for tail end information acquisition of the Internet of things.
Background
A pilot operated check valve is a switch that allows only one-way flow of liquid. The common hydraulic control one-way valve is composed of a valve body, a valve core, a spring and other parts. When the liquid positively flows through the one-way valve, the valve clack controlled by the spring can be jacked up when certain hydraulic pressure is reached, so that the liquid circulation is realized; when the liquid flows reversely, the spring presses the valve clack down, the one-way valve is closed, and the liquid cannot flow backwards.
Although the existing hydraulic control one-way valve can realize one-way conduction, the existing hydraulic control one-way valve cannot normally operate under extreme cold conditions, and the result of freezing damage often appears.
Disclosure of Invention
Aiming at the technical problems that the existing hydraulic control one-way valve cannot normally operate under extreme cold conditions and is often damaged by freezing, the invention provides the anti-freezing detachable right-angle hydraulic control one-way valve for acquiring the tail end information of the Internet of things.
The purpose of the invention is realized by the following technical scheme:
the invention relates to a right-angle hydraulic control one-way valve for tail end information acquisition of the Internet of things, which comprises a valve body, a valve core, a coil and a temperature control device, wherein the valve body is an integral right-angle valve body formed by hermetically connecting a right-angle valve body and a right-angle valve body; the temperature control device is characterized in that a partition plate is arranged between the left inner cavity and the middle inner cavity, a center hole is formed in the valve core, a sealing ball is arranged between the liquid inlet end of the center hole of the valve core and the partition plate, a plurality of through holes I are formed in the partition plate, a plurality of through holes II are formed in the liquid outlet end of the valve core along the periphery of the valve core to form liquid outlets, liquid in the right inner cavity flows out through the corner valve cavity, an electromagnetic coil of the temperature control device is respectively wound outside the valve body at the liquid inlet end of the valve body and the liquid outlet end of the right-angle valve body, a switching-on/off module of the temperature control device and a temperature information acquisition module are arranged on the corresponding valve body part in the middle of the valve core, and the temperature control device controls the heating or stops the heating of the electromagnetic coil according to the acquired information.
Furthermore, the valve core is formed by arranging a connecting channel between the two symmetrical left and right valve core bodies, a plurality of through holes III are formed in the connecting channel, the through holes III are communicated with the central holes of the left and right valve core bodies, and through holes II formed around the liquid outlet end of the valve core are communicated with the central holes.
Further, the diameter of the central hole of the valve core is smaller than that of the sealing ball.
Furthermore, a rubber gasket for covering the sealing ball and the through hole I is arranged at the top of the liquid inlet end of the valve core.
Furthermore, a buffering and damping pad is arranged at the end part of the valve core for liquid outlet.
Furthermore, a baffle is arranged at the liquid inlet end of the valve body corresponding to the right valve core body, a through hole matched with the connecting channel is formed in the middle of the baffle, and the connecting channel moves along the through hole of the baffle.
Further, the straight valve body and the right-angle valve body are hermetically connected through a thread structure, namely, the connecting part of the straight valve body and the right-angle valve body is respectively provided with an external thread connecting end and an internal thread connecting end which are matched with each other.
Furthermore, the temperature control device comprises an on-off and temperature information acquisition module, a controller, an electromagnetic coil and a coil switch, the on-off and temperature information acquisition module comprises an on-off switch, a temperature sensor and an information acquisition module, the on-off switch and the temperature sensor are respectively connected with the controller through the information acquisition module, the controller is connected with the coil switch, and the electromagnetic coil is controlled to heat or stop heating through the coil switch.
Furthermore, the on-off switches are two pairs and are respectively arranged outside the upper valve core body, the lower valve core body and the corresponding valve bodies of the valve cores.
Further, the temperature sensor is arranged outside the middle position of the valve body and used for detecting the temperature of the valve body.
The beneficial effects of the invention are as follows:
1. the valve body of the invention is an integral right-angle valve body formed by sealing and connecting a straight valve body and a corner valve cavity, a clapboard is arranged between the left inner cavity and the middle inner cavity in the valve body, and a valve core is movably arranged in the middle inner cavity of the valve body and can move left and right along the middle inner cavity of the valve body; the temperature control device is characterized in that a central hole is formed in the valve core, a sealing ball is arranged between a liquid inlet end of the central hole of the valve core and the partition plate, a plurality of through holes I are formed in the partition plate, a liquid outlet is formed by arranging through holes II along the periphery of the valve core at a liquid outlet end of the valve core, liquid in a cavity at the right part flows out through the corner valve cavity, an electromagnetic coil of the temperature control device is respectively wound outside a valve body at the liquid inlet end of the valve body and the liquid outlet end of the right-angle valve body, a switching-on and switching-off and temperature information acquisition module of the temperature control device is arranged at a corresponding valve body part in the middle of the valve core, and the temperature control device controls the heating of the electromagnetic coil or stops heating according to acquired information; the valve core is driven to slide along the inner cavity of the middle part of the valve body through the liquid flow, so that the one-way flow of the liquid is ensured, and the backflow is prevented; through the control of the temperature control device, the heating one-way valve is realized, the heat transfer efficiency is improved, and the situation of out-of-control freezing damage in a low-temperature environment can be effectively avoided.
2. The magnetic suction switch of the temperature control device is arranged at the outer positions of the valve core and the corresponding valve body, so that the on-off state of the one-way valve can be effectively detected. The temperature sensor is arranged outside the middle position of the valve body of the one-way valve to detect the temperature of the valve body. And the electromagnetic coils of the temperature control device are respectively wound outside the valve body at the liquid inlet end and the liquid outlet end of the right-angle valve body. The invention controls whether the electromagnetic coil is heated or not according to the detected temperature so as to adjust the heating power of the electromagnetic coil and achieve the purpose of energy saving.
Drawings
FIG. 1 is a sectional view showing the structure of the present invention.
In the figure: 1. a valve inlet port; 2. a valve cover; 3. a valve body 4 and a through hole I; 5. a sealing ball; 6. the valve core comprises a valve core body, a valve core body 61, a central hole 62, a connecting channel 63, a rubber gasket 64, through holes II and 65, a left valve core body 66, a right valve core body 67, through holes III and 68, a shock pad 69 and a baffle plate; 7. a magnetic suction switch I; 8. a valve outlet; 9. a movable thread sealing structure 10, a clapboard; 11. magnetic switch II, 12, temperature sensor, 13, sealing screw plug, 14, arc corner, 15, electromagnetic coil.
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.
Example (b): the invention relates to a right-angle hydraulic control one-way valve for tail end information acquisition of the Internet of things, which comprises a valve body 3, a valve core 6, an electromagnetic coil 9 and a temperature control device, wherein the valve body 3 is an integral right-angle valve body formed by hermetically connecting a right-angle valve body and a right-angle valve body, a valve cavity is arranged in the valve body 3, a left inner cavity, a middle inner cavity, a right inner cavity and a corner valve cavity are sequentially arranged from the liquid inlet side to the liquid outlet side, and the valve core 6 is movably arranged in the middle inner cavity of the valve body and moves left and right along the middle inner cavity of the valve body 3; the temperature control device is characterized in that a partition plate 10 is arranged between the left inner cavity and the middle inner cavity, a center hole 61 is formed in the valve core 6, a sealing ball 5 is arranged between the liquid inlet end of the valve core center hole 61 and the partition plate 10, a plurality of through holes I4 are formed in the partition plate 10, a plurality of through holes II 64 are formed in the periphery of the right valve core body 66 at the liquid outlet end of the valve core 6 to form a liquid outlet, liquid in the right inner cavity flows out through a corner valve cavity, an electromagnetic coil 15 of the temperature control device is wound outside the valve body at the liquid inlet end and the liquid outlet end of the right-angle valve body respectively, a switching-on and switching-off and temperature information acquisition module of the temperature control device is arranged at a corresponding valve body part in the middle of the valve core 6, and the temperature control device controls the heating or stops heating of the electromagnetic coil 15 according to acquired information.
The on-off signal judges the on-off state of the one-way valve, the temperature information module collects temperature information, the heating control of the electromagnetic coil 15 is realized through a controller of the temperature control device, and the temperature control is realized by controlling the switch of the electromagnetic coil 15 through temperature change; when the temperature is high, the heating is stopped, and when the temperature is low, the heating is started.
Furthermore, the valve core 6 is formed by arranging a connecting channel 62 between the two symmetrical left and right valve core bodies 65, 66, a plurality of through holes III 67 are formed in the connecting channel 62, the through holes III 67 are communicated with the central holes 61 of the upper and lower valve core bodies 65, 66, a plurality of through holes II 64 are formed on the periphery of the lower valve body 66 of the valve core 6 close to the bottom, and the through holes II 64 are communicated with the central holes 61. The end part of the valve core, which is discharged with liquid, is provided with a buffer damping pad 68, which plays a role in buffering and damping.
Furthermore, a plurality of through holes I4 formed in the partition plate 10 are uniformly formed along the circumference of the end surface contacting with the valve core 6. The diameter of the central hole 61 of the valve core 6 is smaller than that of the sealing ball 5. The top of the liquid inlet end of the valve core 6 is provided with a rubber gasket 63 covering the sealing ball 5 and the through hole I4, and when liquid flows reversely, the rubber gasket 63 just covers the sealing ball 5 and the through hole I4, so that the unidirectional flow of the liquid is ensured.
Furthermore, in this embodiment, a baffle 69 is connected to the valve body 3 corresponding to the liquid inlet end of the lower valve core 66, a through hole matched with the connecting channel 62 is formed in the middle of the baffle 60, and the connecting channel 62 moves along the through hole of the baffle. When the check valve flows in the positive direction, the valve core 6 is jacked through the through hole I4, then liquid flows along the valve core central hole 61 and the through hole III 67 in the connecting channel 62 and flows out of the through holes II 64 on the periphery of the bottom of the valve core 6, and then the liquid pushes the valve core 6 to move while flowing. When the check valve flows reversely, the valve core 6 presses the through hole I4 to close by means of the liquid pressure difference.
Further, the straight valve body and the corner valve body are connected through a movable thread sealing structure 9, namely, an external thread connecting end and an internal thread connecting end which are matched with each other are respectively arranged at the connecting part of the straight valve body and the corner valve body; so that the valve body can be disassembled to clean or replace the valve core. The right-angle valve body corner is an arc corner 14, so that smooth liquid flow is guaranteed. The bottom of the arc corner 14 of the right-angle valve body is provided with a threaded hole, and a detachable closed threaded plug 13 is arranged on the threaded hole, so that impurities in the valve body can be conveniently cleaned.
Further, the temperature control device comprises an on-off and temperature information acquisition module, a controller, an electromagnetic coil 15 and a coil switch, the on-off and temperature information acquisition module comprises an on-off switch, a temperature sensor and an information acquisition module, the on-off switch and the temperature sensor are respectively connected with the controller through the information acquisition module, the controller is connected with the coil switch, and the electromagnetic coil 15 is controlled to heat or stop heating through the coil switch.
Furthermore, the on-off switch in this embodiment is two pairs of magnetic switches, namely a pair of magnetic switches i 7 and a pair of magnetic switches ii 11, which are respectively and correspondingly disposed outside the left valve core body 65 and the right valve core body 66 of the valve core 6 and the corresponding valve body 3, and the on-off state of the check valve can be conveniently and effectively detected by generating a communication signal through the approach of the inner and outer magnetic switches to the suction. Specifically, the external power circuit of the magnetic switch of the embodiment is connected with a signal indicator lamp, the magnetic switch controls the on-off of the external power circuit, and then the one-way valve is judged to be in forward flow or reverse flow.
Further, in this embodiment, the electromagnetic coils 15 are respectively wound outside the valve body at the liquid inlet end of the valve body and the liquid outlet end of the right-angle valve body. Make the valve body produce the vortex through the electromagnetic induction principle and realize the heating, it is higher to compare in resistance wire heating heat transfer efficiency, can effectively solve the problem that the check valve freezes to destroy the out of control under the low temperature environment.
Furthermore, the temperature sensor 12 is disposed outside the valve body at the liquid outlet end of the right-angle valve body, and detects the temperature of the valve body.
The information acquisition module of the embodiment has the existing structure, consists of a signal input processing part, a filtering amplification unit, an A/D conversion processing unit, a photoelectric isolation unit, a thermocouple cold end temperature compensation unit and a power supply unit, and can finish the acquisition of different types of signals.
The temperature sensor outputs an analog voltage signal which is transmitted to the information acquisition module. The heating control of the electromagnetic coil is realized through the controller, and the temperature control is realized by controlling the electromagnetic coil switch according to the temperature change. When the temperature is high, the heating is stopped, and when the temperature is low, the heating is started, so that the purpose of energy conservation is achieved.
The working principle of the invention is as follows:
liquid flows into the valve port 1 along the flowing direction of the one-way valve, and because the valve body 3 is heated by the electromagnetic coil 15 outside the left valve cavity and the right-angle valve cavity, the temperature can rise in the liquid flowing process, and the freezing condition can be effectively avoided. When the left inner valve cavity is filled with liquid, the valve core 6 can be jacked open through the through hole I4 formed in the partition plate 10, then the liquid can flow to the liquid outlet end of the valve core 6 along the through hole III 67 in the valve core connecting channel 62 through the valve core central hole 61 and the gap between the valve core 6 and the middle inner cavity, and because the liquid outlet end of the valve core 6 is sealed, the liquid can act on the liquid outlet end of the valve core baffle plate 69 and the valve core 6 to push the valve core 6 to slide along the inner wall of the middle valve cavity, and meanwhile, the liquid can flow out along the through holes II 64 formed around the liquid outlet end of the valve core, and then continuously flows through the lower valve cavity and flows out through the liquid outlet port 8. The shock absorption pad 68 arranged at the bottom of the valve core 6 can effectively absorb the impact force of the liquid outlet end part of the valve core to the baffle 69. When liquid flows reversely, the reverse pressure can push the liquid inlet end of the valve core 6 to prop against the through hole I4, so that backflow is effectively avoided.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (8)
1. The utility model provides a right angle liquid accuse check valve for terminal information acquisition of thing networking which characterized in that: the valve body is an integral right-angle valve body formed by hermetically connecting a straight valve body and a right-angle valve body, a valve cavity is arranged in the valve body, a left inner cavity, a middle inner cavity, a right inner cavity and a corner valve cavity are sequentially arranged from a liquid inlet end to a liquid outlet end, and the valve core is movably arranged in the middle inner cavity of the valve body and moves left and right along the middle inner cavity of the valve body; a partition plate is arranged between the left inner cavity and the middle inner cavity, a central hole is formed in the valve core, a sealing ball is arranged between a liquid inlet end of the central hole of the valve core and the partition plate, a plurality of through holes I are formed in the partition plate, a liquid outlet is formed by a plurality of through holes II formed along the periphery of the valve core at a liquid outlet end of the valve core, liquid in the right inner cavity flows out through a corner valve cavity, an electromagnetic coil of a temperature control device is respectively wound outside a valve body at the liquid inlet end of the valve body and the liquid outlet end of the right-angle valve body, a switching-on/off and temperature information acquisition module of the temperature control device is arranged at a corresponding valve body part in the middle of the valve core, and the temperature control device controls the heating or stops the heating of the electromagnetic coil according to the acquired information;
the valve core is formed by arranging a connecting channel between two symmetrical left and right valve core bodies, a plurality of through holes III are formed in the connecting channel, the through holes III are communicated with the central holes of the left and right valve core bodies, and through holes II formed around the liquid outlet end of the valve core are communicated with the central holes;
a baffle is arranged on the valve body corresponding to the liquid inlet end of the right valve core body, a through hole matched with the connecting channel is formed in the middle of the baffle, and the connecting channel moves along the through hole of the baffle;
when liquid is full of the left inner cavity, the valve core can be jacked open through the through hole I formed in the partition plate, and then the liquid can flow to the liquid outlet end of the valve core along the through hole III in the valve core connecting channel through the valve core center hole and the gap between the valve core and the middle inner cavity.
2. The right-angle hydraulically-controlled check valve for internet of things terminal information acquisition according to claim 1, wherein: the diameter of the central hole of the valve core is smaller than that of the sealing ball.
3. The right-angle hydraulically-controlled check valve for internet of things terminal information acquisition according to claim 1, wherein: and a rubber gasket for covering the sealing ball and the through hole I is arranged at the top of the liquid inlet end of the valve core.
4. The right-angle hydraulically-controlled check valve for internet of things terminal information acquisition according to claim 1, wherein: and a buffer damping pad is arranged at the end part of the valve core, which is used for discharging liquid.
5. The right-angle hydraulically-controlled check valve for tail-end information acquisition of the internet of things as claimed in claim 1, which is characterized in that: the straight valve body and the right-angle valve body are connected in a sealing mode through a thread structure, namely, the connecting position of the straight valve body and the right-angle valve body is respectively provided with a matched external thread connecting end and a matched internal thread connecting end.
6. The right-angle hydraulically-controlled check valve for internet of things terminal information acquisition according to claim 1, wherein: the temperature control device comprises an on-off and temperature information acquisition module, a controller, an electromagnetic coil and a coil switch, wherein the on-off and temperature information acquisition module comprises an on-off switch, a temperature sensor and an information acquisition module, the on-off switch and the temperature sensor are respectively connected with the controller through the information acquisition module, the controller is connected with the coil switch, and the electromagnetic coil is controlled to heat or stop heating through the coil switch.
7. The right-angle hydraulically-controlled check valve for internet of things terminal information acquisition according to claim 6, wherein: the on-off switches are arranged in two pairs and are respectively arranged on the left valve core body and the right valve core body of the valve core and the corresponding valve body.
8. The right-angle hydraulically-controlled check valve for internet of things terminal information acquisition according to claim 6, wherein: the temperature sensor is arranged outside the middle position of the valve body and used for detecting the temperature of the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111090849.9A CN113803503B (en) | 2021-09-17 | 2021-09-17 | Right-angle hydraulic control one-way valve for internet of things terminal information acquisition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111090849.9A CN113803503B (en) | 2021-09-17 | 2021-09-17 | Right-angle hydraulic control one-way valve for internet of things terminal information acquisition |
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|---|---|
| CN113803503A CN113803503A (en) | 2021-12-17 |
| CN113803503B true CN113803503B (en) | 2023-04-18 |
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