Abstract: An ultrasonic gas meter based on a shunt metering device is provided. The ultrasonic gas meter includes a gas meter casing, and a gas flow stabilizer for stabilizing a gas flow is provided in the gas meter casing. A middle of the gas meter casing is provided with a gas port for gas circulation. A middle of a cavity of the gas port is provided with an ultrasonic metering device for metering a gas. An end of the cavity of the gas port is provided with a shunting plate for shunting the gas. The ultrasonic gas meter slows down and finally stabilizes a gas flow through the cooperation of a first stabilizing assembly, a second stabilizing assembly, a third stabilizing assembly, a limiting assembly, and a rotating assembly. In addition, the service life of the ultrasonic gas meter is extended through a filter screen.

Abstract: An anti-interference structure for an ultrasonic gas meter includes an upper housing and a lower housing. A gas flow channel is fixedly provided in the upper housing. A side of the gas flow channel is fixedly provided with a control box. According to the anti-interference structure for the ultrasonic gas meter, in practical work, gas can enter the gas flow channel, and a signal sensor inside the gas flow channel can detect external signals. When a signal is detected, a motor is started to drive a bidirectional threaded rod to rotate. Thus, two sealing elements are driven to move in opposite directions so as to isolate the flowing gas and prevent it from continuing to flow. Then, the signal sensor sends a signal to notify personnel of inspection. A shielding layer can effectively isolate the external signal, thereby preventing the measurement accuracy from being affected by the external signal.

Abstract: An optimization method based on measurement data of an ultrasonic gas meter, includes: if a relative strength index obtained by analysis does not meet expectation, calculating the degree of influence of a measurement condition on the relative strength index and determining whether to compensate the measurement data of the gas meter according to magnitude of the degree of influence; constructing an initial compensation model for the measurement data of the gas meter; performing sensitivity analysis on the optimized compensation model after multi-variable optimization; completing the correction of display data of the gas meter by a compensation factor combined with real-time temperature and pressure data and obtaining fluid features in a pipeline; matching the gas meter with the corresponding optimization plan from the pre-constructed gas meter optimization knowledge graph based on the correspondence between the fluid features and an optimization plan; and executing the optimization plan to optimize the gas met

Abstract: An ultrasonic gas meter based on a shunt metering device is provided. The ultrasonic gas meter includes a gas meter casing, and a gas flow stabilizer for stabilizing a gas flow is provided in the gas meter casing. A middle of the gas meter casing is provided with a gas port for gas circulation. A middle of a cavity of the gas port is provided with an ultrasonic metering device for metering a gas. An end of the cavity of the gas port is provided with a shunting plate for shunting the gas. The ultrasonic gas meter slows down and finally stabilizes a gas flow through the cooperation of a first stabilizing assembly, a second stabilizing assembly, a third stabilizing assembly, a limiting assembly, and a rotating assembly. In addition, the service life of the ultrasonic gas meter is extended through a filter screen.

Abstract: An anti-interference structure for an ultrasonic gas meter includes an upper housing and a lower housing. A gas flow channel is fixedly provided in the upper housing. A side of the gas flow channel is fixedly provided with a control box. According to the anti-interference structure for the ultrasonic gas meter, in practical work, gas can enter the gas flow channel, and a signal sensor inside the gas flow channel can detect external signals. When a signal is detected, a motor is started to drive a bidirectional threaded rod to rotate. Thus, two sealing elements are driven to move in opposite directions so as to isolate the flowing gas and prevent it from continuing to flow. Then, the signal sensor sends a signal to notify personnel of inspection. A shielding layer can effectively isolate the external signal, thereby preventing the measurement accuracy from being affected by the external signal.

Abstract: A welded high-pressure fuel pump roller tappet, which is used for the fuel injection system in an engine, includes a guide sleeve, a U-shaped holder and a pin-shaft-roller set. Symmetrical positions on the upper portion of left and right sidewalls of the guide sleeve are provided with inflexed flanges. Two sides of the flange are folded inwardly to form a limiting slot. The U-shaped holder includes a bottom plate and side plates located on left and right sides of the bottom plate. Symmetrical positions on two side plates are provided with axle holes. The pin-shaft-roller set is set up between two side plates of the U-shaped holder. Symmetrical positions on the upper portion of the flange are provided with opening slots. After assembly, the U-shaped holder is located between two flanges. Two side plates are located inside the limiting slots in the flanges.

Abstract: This invention provides a novel lightweight rocker arm frame and a forming process of a curved crown part thereof, including two sidewalls and two bottom plates. The two sidewalls are connected through the bottom plates respectively located at two ends. A ball socket protruded upwards and an oil hole are arranged at a bottom plate at one end, and a bottom surface of a bottom plate at the other end is a bearing surface. A pin shaft hole is formed in the middle of each sidewall without the bottom plates. According to the rocker arm frame disclosed by the invention, the strength of the structure can be ensured while light weight is realized. The production efficiency of the rocker arm frame is effectively improved, and the structure of the valve rod supporting position is improved.

Abstract: This invention provides a novel lightweight rocker arm frame and a forming process of a curved crown part thereof, including two sidewalls and two bottom plates. The two sidewalls are connected through the bottom plates respectively located at two ends. A ball socket protruded upwards and an, oil hole are arranged at a bottom plate at one end, and a bottom surface of a bottom plate at the other end is a bearing surface. A pin shaft hole is formed in the middle of each sidewall without the bottom plates. According to the rocker arm frame disclosed by the invention, the strength of the structure can be ensured while light weight is realized. The production efficiency of the rocker arm frame is effectively improved, and the structure of the valve rod supporting position is improved.

Abstract: A welded high-pressure fuel pump roller tappet, which is used for the fuel injection system in an engine, includes a guide sleeve, a U-shaped holder and a pin-shaft-roller set. Symmetrical positions on the upper portion of left and right sidewalls of the guide sleeve are provided with inflexed flanges. Two sides of the flange are folded inwardly to form a limiting slot. The U-shaped holder includes a bottom plate and side plates located on left and right sides of the bottom plate. Symmetrical positions on two side plates are provided with axle holes. The pin-shaft-roller set is set up between two side plates of the U-shaped holder. Symmetrical positions on the upper portion of the flange are provided with opening slots. After assembly, the U-shaped holder is located between two flanges. Two side plates are located inside the limiting slots in the flanges.

Abstract: A high-pressure oil pump roller tappet, used for automobile fuel injection system, mounted between the driving cam and the tappet. The roller tappet includes a shell, a holder, a roller, and a pin. Planes A are arranged on both sides of the seam on lateral sides of the shell. Holes I are arranged at symmetrical positions on two planes A. Holes II are arranged on symmetrical positions on vertical plates. The roller is located in the middle of the pin. Welding has no requirement on the thickness of the plate. The weight can be controlled effectively, reducing inertia force, friction, and wear, improving engine efficiency. The shell and holder are designed as being separate, ensuring that the shell subjects to lateral force as little as possible when the holder subjects to a force, such that the shell is less likely to vibrate. Thus, the shell avoids the abrasion.

Abstract: A high-pressure oil pump roller tappet, used for automobile fuel injection system, mounted between the driving cam and the tappet. The roller tappet includes a shell, a holder, a roller, and a pin. Planes A are arranged on both sides of the seam on lateral sides of the shell. Holes I are arranged at symmetrical positions on two planes A. Holes II are arranged on symmetrical positions on vertical plates. The roller is located in the middle of the pin. Welding has no requirement on the thickness of the plate. The weight can be controlled effectively, reducing inertia force, friction, and wear, improving engine efficiency. The shell and holder are designed as being separate, ensuring that the shell subjects to lateral force as little as possible when the holder subjects to a force, such that the shell is less likely to vibrate. Thus, the shell avoids the abrasion.