Abstract: The present invention belongs to the field of petrochemical industry, and discloses a method for selective hydrogenation of butadiene extraction tail gas and a selective hydrogenation apparatus thereof.

Abstract: The present disclosure provides a locking structure, an arm assembly and a movable platform. The locking structure includes a mounting member, a movable part member and a locking assembly. The movable part member is rotatably connected to the mounting member. The locking assembly is disposed on the mounting member or the movable member. When the mounting member and the movable member are rotated to form a preset angle, the locking assembly may synchronously lock the mounting member and the movable member in the current position, so that the movable member is kept in an unfolded state.

Abstract: A diaphragm pump includes a pump body mechanism, a one-way valve mechanism, a diaphragm mechanism, and an eccentric mechanism, wherein the one-way valve mechanism, the diaphragm mechanism and the eccentric mechanism are mounted at the pump body mechanism. The one-way valve mechanism includes a valve cover and a one-way valve mounted at the pump body mechanism via the valve cover. The diaphragm mechanism includes a pump cover and a diaphragm connected to the pump cover. The pump cover is mounted at the pump body mechanism and covers the diaphragm and the valve cover. The diaphragm is detachably connected to the eccentric mechanism. The pump cover and the diaphragm jointly form a diaphragm cavity, and an inner side of the pump cover is provided with a flow channel communicating with the diaphragm cavity and configured to allow liquid to flow into or out of the diaphragm cavity through the flow channel.

Abstract: The present disclosure provides an agricultural plant protection machine. The machine includes a frame, a liquid storage tank for storing liquid, a pipeline connected to the liquid storage tank, a nozzle, and a pump for pumping the liquid in the liquid storage tank to the nozzle. The pump includes a pump body including a liquid inlet, a liquid outlet, and a pressure relief port; a pressure relief device disposed at the pressure relief port, the pressure relief device including a valve and an elastic reset member, the valve being disposed corresponding to the pressure relief port for sealing the valve. In response to a hydraulic pressure in the pump body exceeding a preset pressure threshold, the valve is separated from the pressure relief port under the force of the liquid and the liquid flows out of the pressure relief port.

Abstract: A diaphragm pump includes a pump body mechanism, a diaphragm mechanism, a motor mechanism, and an eccentric mechanism. The diaphragm mechanism includes a diaphragm. The eccentric mechanism including a bracket assembly and an auxiliary member. The motor mechanism includes a motor. The bracket assembly includes a bracket connected to the diaphragm and a driving member mounted at a motor shaft of the motor. The auxiliary member is mounted at the bracket, arranged corresponding to the driving member, and configured to contact the driving member. The diaphragm mechanism, the motor mechanism, and the eccentric mechanism are mounted at the pump body mechanism. The motor shaft is configured to drive the driving member to reciprocally abut against the auxiliary member to cause the bracket to move together with the auxiliary member to drive the diaphragm to reciprocate.

Abstract: A diaphragm pump includes a pump body mechanism, a one-way valve mechanism, a diaphragm mechanism, a motor mechanism, and an eccentric mechanism. The one-way valve mechanism includes a one-way valve and a valve cover configured to mount the one-way valve at the pump body mechanism. The diaphragm mechanism includes a pump cover mounted at the pump body mechanism and a diaphragm connected to the pump cover. The pump cover is configured to cover the diaphragm and the valve cover. The one-way valve mechanism, the diaphragm mechanism, the motor mechanism, and the eccentric mechanism are mounted at the pump body mechanism.

Abstract: The present disclosure relates to a valve body assembly. The valve body assembly may include a valve body and a valve base. The valve body may include a housing, a valve core, and a first fluid channel. The valve base may include a driving portion and a second fluid channel. A bottom of the housing may include an opening. The valve core may be configured to move relative to the housing to seal the opening in a separated state or open the opening in a docked state.

Abstract: An agricultural plant protection machine and a diaphragm pump thereof are provided. The diaphragm pump includes a pump body including a containing cavity; a pump cover on the pump body; a diaphragm in the containing cavity, which and the pump cover surround to form a cavity; and a driving mechanism in the containing cavity. The driving mechanism includes a push rod, a coil assembly and an elastic reset member. The push rod is connected to the diaphragm and the elastic reset member. When the coil assembly is powered on and powered off alternately, the push rod makes a reciprocating linear motion to drive the diaphragm to reciprocate relative to the pump cover so as to reduce or enlarge the cavity.

Abstract: A spraying apparatus includes a driving mechanism having a driving shaft rotatable around its own axis and a spin plate disposed at a bottom of the driving shaft. The spin plate is configured to rotate with the driving shaft to spray chemical solution. The driving mechanism includes a stator assembly, a rotor assembly and a housing assembly. The housing assembly includes a first housing member and a second housing member. The first housing member and the stator assembly are connected; the rotor assembly is connected to the second housing member; the first housing member is connected to the second housing member by snap-fit; and a bottom side of the second housing member is provided with a water inlet pipe that is connected to an internal of the spin plate.

Abstract: A method and apparatus for connecting peripheral devices are disclosed. The method is performed at an electronic device having one or more processors and memory, and includes: scanning, through a user interface of a social networking application, an image containing encoded information associated with a first peripheral device that provides a first wireless communication interface; retrieving, based on the encoded information, a first identity information item of the first peripheral device from a server hosting a social networking platform associated with the social networking application; and in accordance with the retrieved first identity information item, establishing a wireless connection between the electronic device and the first peripheral device via the first wireless communication interface of the first peripheral device.

Abstract: An input device includes an input module and a fixing module matching the input module. The input module is a sphere having a cavity, the input module includes a signal detection unit and a signal output unit, the signal detection unit and the signal output unit are placed in the cavity after being electrically connected, the signal detection unit is configured to generate a corresponding input signal according to a preset operation performed by a user on the input module, and the signal output unit is connected to an external terminal and configured to output the input signal to the terminal. The fixing module is configured to fix the input device on a preset flat surface.

Abstract: A method and device for transmitting data between a peripheral device and a user device via a Bluetooth Low Energy connection, comprising: at the peripheral device: transmitting data to the user device in a simulated data stream, the transmitting comprising: identifying a first Bluetooth characteristic for writing data, the first Bluetooth characteristic having been exposed by the peripheral device to the user device; dividing a data packet into a sequence of data frames plus zero or one remainder, each data frame having a respective size equal to a predetermined data size of the identified first Bluetooth characteristic; and for each of the sequence of data frames: writing the data frame to a respective value for the identified first Bluetooth characteristic; and pushing the identified first Bluetooth characteristic for reading by the user device.

Abstract: An input device includes an input module and a fixing module matching the input module. The input module is a sphere having a cavity, the input module includes a signal detection unit and a signal output unit, the signal detection unit and the signal output unit are placed in the cavity after being electrically connected, the signal detection unit is configured to generate a corresponding input signal according to a preset operation performed by a user on the input module, and the signal output unit is connected to an external terminal and configured to output the input signal to the terminal. The fixing module is configured to fix the input device on a preset flat surface.

Abstract: A method and device for transmitting data between a peripheral device and a user device via a Bluetooth Low Energy connection, comprising: at the peripheral device: transmitting data to the user device in a simulated data stream, the transmitting comprising: identifying a first Bluetooth characteristic for writing data, the first Bluetooth characteristic having been exposed by the peripheral device to the user device; dividing a data packet into a sequence of data frames plus zero or one remainder, each data frame having a respective size equal to a predetermined data size of the identified first Bluetooth characteristic; and for each of the sequence of data frames: writing the data frame to a respective value for the identified first Bluetooth characteristic; and pushing the identified first Bluetooth characteristic for reading by the user device.

Abstract: A method and device for transmitting data between a peripheral device and a user device via a Bluetooth Low Energy connection, comprising: at the peripheral device: transmitting data to the user device in a simulated data stream, the transmitting comprising: identifying a first Bluetooth characteristic for writing data, the first Bluetooth characteristic having been exposed by the peripheral device to the user device; dividing a data packet into a sequence of data frames plus zero or one remainder, each data frame having a respective size equal to a predetermined data size of the identified first Bluetooth characteristic; and for each of the sequence of data frames: writing the data frame to a respective value for the identified first Bluetooth characteristic; and pushing the identified first Bluetooth characteristic for reading by the user device.

Abstract: A method and apparatus for connecting peripheral devices are disclosed. The method is performed at an electronic device having one or more processors and memory, and includes: scanning, through a user interface of a social networking application, an image containing encoded information associated with a first peripheral device that provides a first wireless communication interface; retrieving, based on the encoded information, a first identity information item of the first peripheral device from a server hosting a social networking platform associated with the social networking application; and in accordance with the retrieved first identity information item, establishing a wireless connection between the electronic device and the first peripheral device via the first wireless communication interface of the first peripheral device.

Abstract: A method and device for transmitting data between a peripheral device and a user device via a Bluetooth Low Energy connection, comprising: at the peripheral device: transmitting data to the user device in a simulated data stream, the transmitting comprising: identifying a first Bluetooth characteristic for writing data, the first Bluetooth characteristic having been exposed by the peripheral device to the user device; dividing a data packet into a sequence of data frames plus zero or one remainder, each data frame having a respective size equal to a predetermined data size of the identified first Bluetooth characteristic; and for each of the sequence of data frames: writing the data frame to a respective value for the identified first Bluetooth characteristic; and pushing the identified first Bluetooth characteristic for reading by the user device.

Abstract: A method and device for transmitting data between a peripheral device and a user device via a Bluetooth Low Energy connection, comprising: at the peripheral device: transmitting data to the user device in a simulated data stream, the transmitting comprising: identifying a first Bluetooth characteristic for writing data, the first Bluetooth characteristic having been exposed by the peripheral device to the user device; dividing a data packet into a sequence of data frames plus zero or one remainder, each data frame having a respective size equal to a predetermined data size of the identified first Bluetooth characteristic; and for each of the sequence of data frames: writing the data frame to a respective value for the identified first Bluetooth characteristic; and pushing the identified first Bluetooth characteristic for reading by the user device.

Abstract: A method and device for transmitting data between a peripheral device and a user device via a Bluetooth Low Energy connection, comprising: at the peripheral device: transmitting data to the user device in a simulated data stream, the transmitting comprising: identifying a first Bluetooth characteristic for writing data, the first Bluetooth characteristic having been exposed by the peripheral device to the user device; dividing a data packet into a sequence of data frames plus zero or one remainder, each data frame having a respective size equal to a predetermined data size of the identified first Bluetooth characteristic; and for each of the sequence of data frames: writing the data frame to a respective value for the identified first Bluetooth characteristic; and pushing the identified first Bluetooth characteristic for reading by the user device.