10results about How to "Improve flow coefficient" patented technology

The present invention relates to an anti-crystallization straight-through membrane plug valve for battery electrolyte filling, wherein the lower valve body and the upper valve body are fixed, the lower valve body is formed with an inlet, an outlet and a connecting portion, the inlet and the outlet are connected through the connecting portion, the diaphragm includes a tapered portion and a connecting portion, the connecting portion is located outside the tapered portion and is integrally formed with the tapered portion, the edge of the connecting portion is fixed relative to the lower valve body, the tapered portion is formed with a first tapered surface, the connecting portion is formed with a second tapered surface, and the first tapered surface and the second tapered surface are adapted. The connecting portion of the present invention does not have a valve seat, nor is it narrowed, but is sealed by the second tapered surface and the tapered portion, the straight flow path improves the flow coefficient and reduces the accumulated liquid, thereby reducing the number of crystals left after the accumulated liquid dries, improving the sealing and life of the diaphragm and the valve body, and solving the problem of low flow coefficient and high crystallization of the existing membrane plug valve.

The utility model provides a stop valve, and belongs to the technical field of stop valves. The problems that in the prior art, a valve clack is unstable in installation and poor in flow guiding effect are solved. The valve comprises a valve body, a valve clack body, a sealing cover and a valve rod, the outer portion of the valve body is in a symmetrical oval shape, an inlet flange and an outlet flange are formed on the two sides of the valve body respectively, a connecting flange is formed at the upper end of the valve body, a flow guide body is formed in the valve body, and a through installation circulation hole is formed in the middle of the flow guide body. An upper partition arm and a lower partition arm are formed at the upper and lower diagonal angles of the flow guide body respectively, an upper flow guide channel and a lower flow guide channel are formed between the upper partition arm and the valve cavity and between the lower partition arm and the valve cavity respectively, the sealing cover is fixedly connected with the connecting flange, the valve clack body is fixedly connected with the end of the valve rod, the valve rod penetrates through the sealing cover, and the valve clack body is installed in the installation circulation hole. And a wear-resistant bushing is fixedly sleeved outside the valve clack body. The flow guide device has the advantages of stable structure and good flow guide effect.

The present invention discloses a large flow diaphragm valve for semiconductor manufacturing, which relates to the technical field of high-purity gas valves for semiconductor manufacturing, and solves the problem of small flow coefficient of diaphragm valves. The diaphragm valve includes a valve body, a diaphragm, a valve seat assembly, a valve stem, a valve sleeve and a handle. The valve body has an inlet flow channel and an outlet flow channel. The diaphragm and the valve body surround a receiving cavity. The valve stem is fixedly connected to the valve seat assembly. The valve stem includes a valve stem body and a valve stem convex portion. The valve sleeve is sleeved on the valve stem body and slides relative to the valve stem body. The handle is sleeved on the outer periphery of the valve sleeve and rotates synchronously with the valve sleeve in the circumferential direction. When the handle rotates, the valve sleeve rotates around the axis of the valve stem body and approaches or moves away from the inlet flow channel, driving the valve stem convex portion to approach or move away from the inlet flow channel, and the valve stem is used to drive the valve seat assembly to abut or separate from the inner wall of the valve body, and the valve seat assembly is used to close or open the outlet of the inlet flow channel. The diaphragm valve of the present invention is used to increase the flow coefficient of the diaphragm valve and improve the outlet flow of the diaphragm valve.

The invention discloses an intake valve seat ring which is used for improving the performance of an engine. The seat ring comprises a seat ring body, a baffle ring and a baffle, the seat ring body is installed on a cylinder cover of an engine, and a round hole face, a first inclined face and a second inclined face are arranged on an inner ring of the seat ring body. The round hole surface, the first inclined surface and the second inclined surface are sequentially connected; the baffle ring is arranged at one end of the seat ring body and is connected with the circular hole surface; the baffle is arranged on the inner ring of the baffle ring and used for blocking part of inlet gas so as to increase the flow speed of the inlet gas of the engine; the inner diameter of the baffle ring is the same as that of the seat ring body, and the outer diameter of the baffle ring is smaller than that of the seat ring body.

This utility model discloses a cylinder head intake manifold, an engine, and a vehicle, relating to the field of engine technology. The cylinder head intake manifold is located inside the cylinder head of the engine and is used to connect to the engine cylinders. The cylinder head intake manifold includes two independently configured intake passages. Each intake passage has a valve guide mounting hole corresponding to it. Each valve guide mounting hole extends from the top of the cylinder head through the end of the corresponding intake passage and connects to the corresponding cylinder. An intake valve guide for installing a valve is fixedly connected to the upper part of each valve guide mounting hole. The end of each intake valve guide does not protrude into the corresponding intake passage. The centerline of each valve guide mounting hole is inclined at 1.5° towards the inlet side of the intake passage. This utility model improves the structure of the cylinder head intake manifold, preventing the end of the intake valve guide from protruding into the intake passage and solving the problem in the prior art where the end of the engine intake valve guide protruding into the intake passage disrupts the intake airflow.

The utility model discloses an ultra-large current rectifying device, which belongs to the technical field of power electronics and comprises a plurality of rectifier bridge arms and water-cooled busbars, the rectifier bridge arms and the water-cooled busbars are mounted on an inner frame of a rectifier cabinet, each rectifier bridge arm comprises a diode and a press-fitting structure, the diameter of a tube core of each diode is four inches, and the diameter of the press-fitting structure is four inches. The direct-current wire outlet ends of each rectifier bridge arm are symmetrically arranged at the upper end and the lower end of the rectifier bridge arm, and the current path lengths of the parallel branches are equal. According to the utility model, the current sharing capability, the heat dissipation efficiency and the long-term operation stability of the rectifying device are improved.

The invention belongs to the technical field of flue gas purification, and relates to a device and a method for improving calcium-based dry desulfurization efficiency by utilizing fluid self-oscillation, the device comprises a fluid self-oscillation device connected between a powdery desulfurization catalyst conveying pipeline and a desulfurization reactor; the fluid self-oscillation device comprises a fluid mixing cavity and a fluid feedback channel, a fluid inlet section is arranged at one end, close to the powdery desulfurization catalyst conveying pipeline, of the fluid mixing cavity, a fluid outlet section and an outflow diverging section are sequentially arranged at one end, close to the desulfurization reactor, of the fluid mixing cavity, and the fluid self-oscillation device is connected with the desulfurization reactor through the outflow diverging section; one end of the fluid feedback channel is connected to the fluid inlet section of the fluid mixing cavity, and the other end of the fluid feedback channel is connected to the fluid outlet section of the fluid mixing cavity. The fluid self-oscillation device with a special structure is used for spraying the powdery desulfurization catalyst, so that the aim of improving the calcium-based dry desulfurization efficiency is fulfilled.

This invention discloses a high-pressure gas flow measurement and control device capable of rapid replacement, comprising an upstream sealing short pipe, a first outer nut, a second outer nut, a sonic nozzle, an O-ring seal, and a downstream sealing short pipe. The upstream sealing short pipe and the sonic nozzle are connected by the first outer nut, and the sonic nozzle and the downstream sealing short pipe are connected by the second outer nut, with O-ring seals at the end faces. This invention also discloses a replacement method: when replacing the sonic nozzle, simply loosening the first and second outer nuts allows the sonic nozzle to be directly and easily removed, making replacement and installation very convenient. Furthermore, the sonic nozzle throat features a design with a contraction section, a transition section, a straight section, and an expansion section profile, resulting in a high flow coefficient.

The application relates to a detachable flame tube air inlet hopper structure which is arranged at a flame tube wall surface of an aero-engine combustion chamber and specifically arranged at a head portion of the flame tube wall surface and a connection portion of an annular tube, and is composed of an outer hopper cap (11), an inner hopper cap (12) and a hopper body (13). The application also relates to an assembly method of the detachable flame tube air inlet hopper structure, which comprises the following steps: welding the head portion of the combustion chamber flame tube and the annular tube through argon arc welding; processing an air inlet circular hole; making the lower surface of the outer hopper cap of the air inlet hopper adhere to the outer wall surface of the flame tube; and expanding the air inlet hopper structure to the upper surface adhering to the inner wall surface of the flame tube. The air inlet hopper structure is simple, the flow field structure of the flame tube can be adjusted by replacing air inlet hoppers with different inner diameters, the ablation risk of a swirler is reduced, the service life of the swirler is prolonged, and the maintenance cost is reduced.