CN221261545U - Cabinet hardware structure of intelligent oil well control cabinet - Google Patents
Cabinet hardware structure of intelligent oil well control cabinet Download PDFInfo
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- 239000003129 oil well Substances 0.000 title claims abstract description 40
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- 238000010586 diagram Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
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- 239000013065 commercial product Substances 0.000 description 1
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Abstract
The utility model discloses a cabinet body hardware structure of an intelligent oil well control cabinet, which comprises the following components: remote IO, converter, smart electric meter, functional logic realization module, power module, wherein: the remote IO wire is connected with the frequency converter and the intelligent ammeter; the remote IO is connected with the wellhead sensor and the indicator in a wireless manner; the remote IO is connected with the online monitoring terminal through the Ethernet, sends field data to the online monitoring terminal and receives a control command of the field data; the power module is connected with the remote IO module, the frequency converter and the intelligent ammeter to supply power to the remote IO module. The cabinet body is convenient to operate and has the functions of power frequency, variable frequency selection, local and remote start and stop, local and remote frequency adjustment, working state indication and fault alarm.
Description
Technical Field
The utility model relates to the field of intelligent oil field control, in particular to an intelligent oil well control cabinet for an intelligent oil field.
Background
Continuous, stable and safe operation of the oilfield oil well system is of great significance in reducing oilfield exploitation cost, improving pumping unit efficiency and oil well yield. However, most of domestic oil fields are distributed in remote areas, the areas are wide, the natural environment conditions are severe, and the monitoring and intelligent control of the oil wells become the difficulty for restricting the development of intelligent oil fields.
In recent years, the rapid development of the internet of things technology promotes the intellectualization of the petroleum industry, provides technical support for solving the problems, and currently, the internet of things technology is commonly applied to various processes of oil field exploration and development by petroleum companies in the industry so as to realize efficient collection, transmission, processing, analysis and summarization of oil well data. However, most of the Internet of things systems of domestic oil fields still stay in the stages of oil well data acquisition and remote data transmission at present, and the comprehensive analysis of subsequent data and the adjustment and control of oil well equipment generally also need to depend on manual experience, so that the defects of the whole system in real-time performance, accuracy and labor cost still exist. Therefore, there is a need for an intelligent oil well control system that can realize the functions of condition diagnosis, condition change identification, software oil measurement, personnel intrusion identification, automatic stroke frequency adjustment, automatic start-stop control, intermittent pumping system optimization, etc., so as to improve the oil field production efficiency, reduce the production cost and improve the oil well yield.
In order to solve the technical problems, the island-rich oil and gas company submits a patent application to the national intellectual property agency after research and development: an oil well online monitoring terminal, bulletin number CN217767230U, which gives a monitoring scheme of oil field working conditions.
The online monitoring terminal diagnoses the working state of the oil well in real time based on a deep learning algorithm deployed on the online monitoring terminal, and interacts data with a cloud platform of an online intelligent control system of the oil well in a 4G communication mode. The on-line monitoring terminal transmits sensor data, frequency converter data, dynamometer data, alarm data, working condition diagnosis and oil measurement results to the cloud platform, and simultaneously receives configuration parameters, control instructions and program upgrading files sent by the cloud platform.
Disclosure of utility model
The utility model aims to provide a cabinet body hardware structure of an intelligent oil well control cabinet, which is used for matching the application of an online monitoring terminal, supporting the real-time acquisition, intelligent monitoring and remote transmission of oil well working condition data, sending real-time early warning and subsequent control instructions according to intelligent monitoring results, adjusting pumping parameters of an oil pumping unit, stabilizing oil field production, meeting the application requirements of enterprise engineering, and having good application value for improving the oil field production efficiency and reducing the production cost.
The technical scheme is as follows:
a cabinet hardware structure of an intelligent oil well control cabinet, comprising: remote IO, converter, smart electric meter, functional logic realization module, power module, wherein:
The remote IO wire is connected with the frequency converter and the intelligent ammeter; the remote IO is connected with the wellhead sensor and the indicator in a wireless manner; the remote IO is connected with the online monitoring terminal through the Ethernet, sends field data to the online monitoring terminal and receives a control command of the field data;
The power module is connected with the remote IO module, the frequency converter and the intelligent ammeter to supply power to the remote IO module.
Specifically, the functional logic implementation module includes a panel switch button module, an internal intermediate relay module, a contactor module and a logic circuit module, wherein:
The switch button module includes: the power frequency variable frequency selection switch SA1, the frequency adjustment selection switch SA2, the remote start selection switch SA3, the motor start button SB2, the motor stop button SB1, the manual adjustment knob, the motor operation indicator lamp HR and the variable frequency fault indicator lamp HY;
The intermediate relay module includes: intermediate relay KA1, intermediate relay KA2; the contactor module includes: controlling a contactor KM1 of a power frequency main loop and a contactor KM2 of a variable frequency main loop;
the logic circuit module includes: a frequency converter monitoring circuit portion and a chain logic circuit portion.
Specifically, in the frequency converter monitoring circuit part, a third normally open contact KA2-3 of an intermediate relay KA2, a second normally open contact KA1-2 of the intermediate relay KA1 and a normally open contact of a contactor KM2 are sequentially connected in series between a start-stop control end S1 and a COM end of the frequency converter; the remote gear switch SA2-2 of the frequency adjustment selection switch SA2, the second normally open contact KA1-2 of the intermediate relay KA1 and the normally open contact of the contactor KM2 are sequentially connected in series between the control end S2 and the COM end of the frequency adjustment mode of the frequency converter.
Specifically, in the sequential logic circuit portion, 6 control circuits are connected in parallel between the control power supplies:
1) Frequency converter fault circuit: the TA and TC normally open contacts of the frequency converter are connected in series with the KA1 coil of the intermediate relay;
2) Fault prompting circuit: the first normally open contact of the intermediate relay KA1 is connected in series with a variable frequency fault indicator HY;
3) The power frequency operation circuit comprises: a power frequency shift switch SA1-1 of a power frequency variable frequency selection switch SA1, a first normally open contact KA2-1 of an intermediate relay KA2, a normally closed contact of a contactor KM2 and a coil of the contactor KM 1;
4) Variable frequency operation allowing circuit: variable frequency gear switch SA1-2 of power frequency variable frequency selection switch SA1, normally closed contact of contactor KM1 and coil of contactor KM 2;
5) Starting and stopping circuit of motor: the remote IO output normally-closed contact RE-2 and the normally-closed contact of the motor stop button SB1 are connected in series in sequence, and then three parallel circuits are connected in series: the first path is a normally open contact RE-1 of a permission switch SA3-1 of a remote start selection switch SA3 and remote IO output, the second path is a normally open contact of a motor start button SB2, and the third path is a normally open contact of KA 2; finally, the coil of KA2 of the intermediate relay is connected in series;
6) Motor operation indication circuit: the second normally open contact KA2-2 of the intermediate relay KA2 is connected in series with the motor operation indicator lamp HR.
Specifically, the remote IO acquires wellhead sensor data and indicator data by adopting a LORA/ZigBee wireless communication mode; the remote IO is connected with the frequency converter bus interface by adopting a first RS485 bus interface, and is connected with the intelligent ammeter summarizing interface by adopting a second RS485 bus interface, so that the frequency converter is monitored and the electric quantity data of the intelligent ammeter are acquired based on a corresponding Modbus protocol.
Specifically, a hole groove is formed in the front panel of the cabinet body, and the hole groove is used for placing a switch button module of the functional logic realizing module, an adjusting panel of the frequency converter and a front panel of the intelligent ammeter.
Specifically, the power supply module adopts three-phase four-wire input, three-phase power supplies power for motor power frequency and variable frequency work, and meanwhile, one-phase voltage is taken as a 220V control power supply and rectified into 24V direct current to supply power for an online monitoring terminal.
The beneficial effects are that:
the cabinet body is convenient to operate and has the functions of power frequency, variable frequency selection, local and remote start and stop, local and remote frequency adjustment, working state indication and fault alarm.
The intelligent monitoring system is matched with an online monitoring terminal product for use, plays the function of the online monitoring terminal on the basis of the hardware structure/circuit of the control cabinet body, fully utilizes the communication technology of the Internet of things and the artificial intelligence technology, realizes the real-time acquisition, intelligent monitoring, remote transmission and local storage of oil well working condition data, simultaneously realizes the accurate early warning of the failure of the pumping well and the intelligent regulation of pumping parameters, and has good real-time performance.
The utility model improves the production efficiency of the oil field, can effectively reduce the labor cost, and ensures that the production management work of the oil field is more efficient, real-time and intelligent.
Drawings
FIG. 1 is a schematic diagram of a frame structure of a smart oil well control cabinet according to the present utility model;
FIG. 2 is a diagram of the remote IO related signals and wiring of the intelligent oil well control cabinet of the present utility model;
FIG. 3 is a schematic diagram of a front panel device of a smart well control cabinet in accordance with the present utility model;
FIG. 4 is a diagram of a portion of a frequency converter monitoring circuit of a functional logic implementation module of an intelligent oil well control cabinet according to the present utility model;
FIG. 5 is a diagram of a portion of the interlock logic of the intelligent oil well control cabinet functional logic implementation module of the present utility model.
Detailed Description
The following will further describe the technical solution in the embodiment of the present utility model with reference to the accompanying drawings in the embodiment of the present utility model:
The utility model discloses a cabinet body hardware structure of an intelligent oil well control cabinet, a frame structure schematic diagram of which is shown in fig. 1, and the intelligent oil well control cabinet comprises a control cabinet body, a remote IO, a frequency converter, an intelligent ammeter, a functional logic realizing module and a power module, wherein fig. 1 also comprises an online monitoring terminal applicable to the intelligent oil well control cabinet.
The online monitoring terminal is used for processing and analyzing oil well working condition data, diagnosing working conditions, measuring oil by software, intelligently regulating and controlling, generating alarm data and issuing control instructions;
The remote IO is used for acquiring oil well working condition data, frequency converter data and wellhead sensor data;
The frequency converter is used for adjusting the equipment of the on-site oil pumping motor frequency according to the control instruction of the on-line monitoring terminal;
The intelligent ammeter is used for collecting the electricity consumption of the oil pumping motor;
The function logic module is used for realizing the logic function of the control cabinet and comprises local and remote control selection, power frequency and variable frequency control selection, local start and stop operation and motor state indication.
The power module is used for supplying power to the on-line monitoring terminal, the remote IO module, the frequency converter and the intelligent ammeter;
The online monitoring terminal is preferably a patent product online monitoring terminal RICEH _OPAC of Fudao corporation, and the product adopts a patent 'an oil well online monitoring terminal', with the bulletin number of CN217767230U. The terminal diagnoses the working state of the oil well in real time based on a deep learning algorithm deployed on the terminal, and interacts data with a cloud platform of an oil well online intelligent control system in a 4G communication mode. The on-line monitoring terminal transmits sensor data, frequency converter data, dynamometer data, alarm data, working condition diagnosis and oil measurement results to the cloud platform, and simultaneously receives configuration parameters, control instructions and program upgrading files sent by the cloud platform.
The intelligent oil well control cabinet is connected with the network camera in an Ethernet mode to acquire video data of the working process of the on-site oil pumping equipment, so that the on-line intelligent oil well control terminal sets an IP address corresponding to the network camera for pairing connection, and the on-line intelligent oil well control terminal performs working condition video identification based on the acquired RTSP video stream data of the working process of the equipment;
The remote IO is preferably a patent product remote control terminal RICEH _RIO of Fu island company, and the product adopts a patent 'a remote IO module', and the bulletin number is CN217767434U. The remote IO acquires wellhead sensor data and indicator data by adopting a LORA/ZigBee wireless communication mode; the remote IO is connected with the frequency converter bus interface by adopting a first RS485 bus interface, and is connected with the intelligent ammeter summarizing interface by adopting a second RS485 bus interface, so that the frequency converter is monitored and the electric quantity data of the intelligent ammeter are acquired based on a corresponding Modbus protocol. The remote IO is connected with the online monitoring terminal through the Ethernet, sends field data to the online monitoring terminal and receives a control command of the field data. The remote IO related signal and wiring is shown in FIG. 2.
Preferably, the frequency converter is a blue sea Hua Teng V9-H-4T-37G/45L frequency converter.
Preferably, the smart meter is An Kerui PZ72L-E4/C smart meter.
The functional logic realizing module is characterized by comprising: the panel switch button module, the internal intermediate relay module, the contactor module and the logic circuit module. Fig. 3 shows a layout diagram of front panel devices of the intelligent oil well control cabinet, so that the installation and distribution conditions of the panel switch modules can be clarified.
The switch button module includes: the power frequency variable frequency selection switch SA1, the frequency adjustment selection switch SA2, the remote start selection switch SA3, the motor start button SB2, the motor stop button SB1, the manual adjustment knob, the motor operation indicator lamp HR and the variable frequency fault indicator lamp HY.
The intermediate relay module includes: intermediate relay KA1, intermediate relay KA2; the contactor module includes: and controlling a contactor KM1 of the power frequency main loop and a contactor KM2 of the variable frequency main loop.
The logic circuit module includes: a frequency converter monitoring circuit portion and a chain logic circuit portion.
As shown in fig. 4, a frequency converter monitoring circuit part is shown, and a third normally open contact KA2-3 of an intermediate relay KA2, a second normally open contact KA1-2 of the intermediate relay KA1 and a normally open contact of a contactor KM2 are sequentially connected in series between a start-stop control end S1 and a COM end of the frequency converter; the remote gear switch SA2-2 of the frequency adjustment selection switch SA2, the second normally open contact KA1-2 of the intermediate relay KA1 and the normally open contact of the contactor KM2 are sequentially connected in series between the control end S2 and the COM end of the frequency adjustment mode of the frequency converter.
As shown in fig. 5, the chain logic circuit part is connected in parallel with 6 control circuits between 220V control power supplies (L1 and N):
1) Frequency converter fault circuit: the TA and TC normally open contacts of the frequency converter are connected in series with the KA1 coil of the intermediate relay;
2) Fault prompting circuit: the first normally open contact of the intermediate relay KA1 is connected in series with a variable frequency fault indicator HY;
3) The power frequency operation circuit comprises: a power frequency shift switch SA1-1 of a power frequency variable frequency selection switch SA1, a first normally open contact KA2-1 of an intermediate relay KA2, a normally closed contact of a contactor KM2 and a coil of the contactor KM 1;
4) Variable frequency operation allowing circuit: variable frequency gear switch SA1-2 of power frequency variable frequency selection switch SA1, normally closed contact of contactor KM1 and coil of contactor KM 2;
5) Starting and stopping circuit of motor: the remote IO output normally-closed contact RE-2 and the normally-closed contact of the motor stop button SB1 are connected in series in sequence, and then three parallel circuits are connected in series: the first path is a normally open contact RE-1 of a permission switch SA3-1 of a remote start selection switch SA3 and remote IO output, the second path is a normally open contact of a motor start button SB2, and the third path is a normally open contact of KA 2; finally, the coil of KA2 of the intermediate relay is connected in series;
6) Motor operation indication circuit: the second normally open contact KA2-2 of the intermediate relay KA2 is connected in series with the motor operation indicator lamp HR.
The operation function implementation process of the control cabinet body is as follows:
1) Operating at power frequency. The power frequency variable frequency selection switch SA1 is switched to a power frequency range, the starting button SB2 is pressed, the coil of the intermediate relay KA2 is powered on, the normally open point of the intermediate relay KA2-1 is switched on, the coil of the contactor KM1 is powered on, the main loop terminal is switched on, and the motor operates at an electrical frequency.
2) And (5) performing variable frequency operation. The power frequency variable frequency selection switch SA1 is switched to a variable frequency gear, a coil of the contactor KM2 is electrified, and the contact of the contactor KM2 is attracted to be connected with an output main loop of the frequency converter. When the starting button SB2 is pressed, the coil of the intermediate relay KA2 is electrified, and the normally open point of KA2-3 is connected with the forward rotation signal of the frequency converter, so that the frequency converter outputs voltage, and the motor is electrified to operate.
3) And (5) selecting a variable frequency adjustment mode. The frequency condition selection switch SA2 is switched to a local gear, and a manual adjusting knob adjusts the frequency value of the external potentiometer of the frequency converter; SA2 is switched to a remote gear, and the frequency value is regulated by receiving an RS485 communication command of a remote IO.
4) And (5) starting and stopping locally. When the motor start button SB2 is pressed, the coil of the intermediate relay KA2 is powered on, and the normally open point of KA2 is connected with a variable frequency or power frequency loop according to the selected operation mode.
When the motor stop button SB1 is pressed, the normally closed point of the motor stop button SB1 is disconnected, the coil of the intermediate relay KA2 is powered off, the normally open electric shock is disconnected, the starting signal is disconnected, and the motor is powered off and stopped.
5) And (5) selecting a starting mode. The remote start selection switch SA3 is switched to the permission gear, so that remote start and stop are permitted, and the remote start selection switch SA3 is switched to the inhibition gear, so that local start and stop can only be carried out.
6) And (5) remote start and stop. Under the condition that the remote start selection switch SA3 is switched to the allowable gear, a cloud platform of the oil well online intelligent control system sends a start command to a host, an online monitoring terminal transmits signals to a remote IO, a normally open point of a relay output RE-1 of the remote IO is connected, a coil of an intermediate relay KA2 is powered on, and a variable frequency or power frequency loop is connected according to a selected operation mode by the normally open point of the KA 2.
Under the condition that the remote start selection switch SA3 is switched to the allowable gear, a cloud platform of the oil well online intelligent control system sends a stop command to a host, an online monitoring terminal transmits a signal to a remote IO, a normally closed point of a relay output RE-2 of the remote IO is disconnected, a coil of the intermediate relay KA2 is powered off, a normally open electric shock is disconnected, a starting signal is disconnected, and a motor is powered off and stopped.
7) And (5) frequency conversion alarm. When faults such as overcurrent, overvoltage and short circuit occur in the motor, the relay output terminals TA and TC of the frequency converter are conducted, the coil of the intermediate relay KA1 is electrified, the normally open point of the KA1 is closed, and the frequency converter fault indicator lamp is lightened.
8) An operation indication. When the coil of the intermediate relay KA2 is powered on, the normally open point of the intermediate relay KA2-2 is closed, and the motor operation indicator lamp is lightened.
As shown in fig. 3, the control cabinet body is provided with a Kong Cao switch button module for placing the functional logic implementation module, a frequency converter adjusting panel and a front panel of the intelligent ammeter on the front panel thereof.
The control cabinet body is characterized in that a power supply module adopts three-phase four-wire input, three-phase power supplies power for power frequency and variable frequency work of a motor, meanwhile, one-phase voltage is taken as a 220V control power supply, and the 220V control power supply is rectified into 24V direct current to supply power for an online monitoring terminal.
The applicant emphasizes that the core scheme of the utility model is the cabinet hardware structure of the control cabinet. In the whole control cabinet, an online monitoring terminal diagnoses the working state of an oil well in real time based on a deep learning algorithm deployed on the online monitoring terminal, and interacts data with a cloud platform of an online intelligent control system of the oil well in a 4G communication mode. The on-line monitoring terminal transmits sensor data, frequency converter data, dynamometer data, alarm data, working condition diagnosis and oil measurement results to the cloud platform, and simultaneously receives configuration parameters, control instructions and program upgrading files sent by the cloud platform. The cabinet hardware structure realizes the transmission of the acquisition information and the control information of the on-line monitoring terminal based on the wireless/wired topology, and the realization of the logic function of the control cabinet based on the functional logic module (the cabinet is convenient to operate and has the functions of power frequency and variable frequency selection, local and remote start and stop, local and remote frequency adjustment, working state indication and fault alarm). The two are different in labor division. And the online monitoring terminal is a commercial product of Fu island company and is not limited by the protection object of the utility model.
Claims (7)
1. The utility model provides a wisdom oil well control cabinet's cabinet body hardware structure which characterized in that includes: remote IO, converter, smart electric meter, functional logic realization module, power module, wherein:
The remote IO wire is connected with the frequency converter and the intelligent ammeter; the remote IO is connected with the wellhead sensor and the indicator in a wireless manner; the remote IO is connected with the online monitoring terminal through the Ethernet, sends field data to the online monitoring terminal and receives a control command of the field data;
The power module is connected with the remote IO module, the frequency converter and the intelligent ammeter to supply power to the remote IO module.
2. The cabinet hardware architecture of claim 1 wherein the functional logic implementation module comprises a panel switch button module and internal intermediate relay module, contactor module and logic circuit module, wherein:
The switch button module includes: the power frequency variable frequency selection switch SA1, the frequency adjustment selection switch SA2, the remote start selection switch SA3, the motor start button SB2, the motor stop button SB1, the manual adjustment knob, the motor operation indicator lamp HR and the variable frequency fault indicator lamp HY;
The intermediate relay module includes: intermediate relay KA1, intermediate relay KA2; the contactor module includes: controlling a contactor KM1 of a power frequency main loop and a contactor KM2 of a variable frequency main loop;
the logic circuit module includes: a frequency converter monitoring circuit portion and a chain logic circuit portion.
3. The cabinet hardware structure according to claim 2, wherein in the frequency converter monitoring circuit portion, a third normally open contact KA2-3 of the intermediate relay KA2, a second normally open contact KA1-2 of the intermediate relay KA1 and a normally open contact of the contactor KM2 are sequentially connected in series between a start-stop control end S1 and a COM end of the frequency converter; the remote gear switch SA2-2 of the frequency adjustment selection switch SA2, the second normally open contact KA1-2 of the intermediate relay KA1 and the normally open contact of the contactor KM2 are sequentially connected in series between the control end S2 and the COM end of the frequency adjustment mode of the frequency converter.
4. The cabinet hardware structure according to claim 2, wherein in the chain logic circuit portion, 6 control circuits are connected in parallel between the control power supplies:
1) Frequency converter fault circuit: the TA and TC normally open contacts of the frequency converter are connected in series with the KA1 coil of the intermediate relay;
2) Fault prompting circuit: the first normally open contact of the intermediate relay KA1 is connected in series with a variable frequency fault indicator HY;
3) The power frequency operation circuit comprises: a power frequency shift switch SA1-1 of a power frequency variable frequency selection switch SA1, a first normally open contact KA2-1 of an intermediate relay KA2, a normally closed contact of a contactor KM2 and a coil of the contactor KM 1;
4) Variable frequency operation allowing circuit: variable frequency gear switch SA1-2 of power frequency variable frequency selection switch SA1, normally closed contact of contactor KM1 and coil of contactor KM 2;
5) Starting and stopping circuit of motor: the remote IO output normally-closed contact RE-2 and the normally-closed contact of the motor stop button SB1 are connected in series in sequence, and then three parallel circuits are connected in series: the first path is a normally open contact RE-1 of a permission switch SA3-1 of a remote start selection switch SA3 and remote IO output, the second path is a normally open contact of a motor start button SB2, and the third path is a normally open contact of KA 2; finally, the coil of KA2 of the intermediate relay is connected in series;
6) Motor operation indication circuit: the second normally open contact KA2-2 of the intermediate relay KA2 is connected in series with the motor operation indicator lamp HR.
5. The cabinet hardware structure according to claim 1, wherein the remote IO collects wellhead sensor data and dynamometer data by using a LORA/ZigBee wireless communication mode; the remote IO is connected with the frequency converter bus interface by adopting a first RS485 bus interface, and is connected with the intelligent ammeter summarizing interface by adopting a second RS485 bus interface, so that the frequency converter is monitored and the electric quantity data of the intelligent ammeter are acquired based on a corresponding Modbus protocol.
6. The cabinet hardware structure according to claim 1, wherein a hole groove is formed in a front panel of the cabinet for placing a switch button module of the functional logic implementation module, an adjusting panel of the frequency converter, and a front panel of the smart meter.
7. The cabinet hardware structure according to claim 1, wherein the power module adopts three-phase four-wire input, three-phase power supplies power for power frequency and variable frequency operation of the motor, and meanwhile, one-phase voltage is taken as a 220V control power supply and rectified into 24V direct current to supply power for the on-line monitoring terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322948665.2U CN221261545U (en) | 2023-10-31 | 2023-10-31 | Cabinet hardware structure of intelligent oil well control cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322948665.2U CN221261545U (en) | 2023-10-31 | 2023-10-31 | Cabinet hardware structure of intelligent oil well control cabinet |
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| Publication Number | Publication Date |
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| CN221261545U true CN221261545U (en) | 2024-07-02 |
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| CN202322948665.2U Active CN221261545U (en) | 2023-10-31 | 2023-10-31 | Cabinet hardware structure of intelligent oil well control cabinet |
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| CN (1) | CN221261545U (en) |
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- 2023-10-31 CN CN202322948665.2U patent/CN221261545U/en active Active
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