8results about How to "Reduce static pressure" patented technology

The utility model discloses a kind of superhigh voltage multicore photoelectric composite six types of data cable, including electric conductor, photoelectric subarea pipe sleeve, optical fiber, wrap layer, insulating layer, heat insulation layer, protective layer, outer armor, the electric conductor is installed in photoelectric subarea pipe sleeve inside, the optical fiber is installed in photoelectric subarea pipe sleeve inside, the wrap layer is wrapped in photoelectric subarea pipe sleeve side end, the insulating layer is coated in wrap layer side end, the heat insulation layer is coated in insulating layer side end, the protective layer is coated in heat insulation layer side end, the outer armor is coated in protective layer side end. The utility model solves the superhigh voltage multicore photoelectric composite six types of data cable when using, copper core of cable carries current and is easy to produce local hot spot, produces local overheating. When cable laying or running is subjected to vibration, bending, optical fiber is prone to stress concentration due to local increase and even breakage problem of attenuation.

The application relates to the technical field of sealing joints, in particular to a sealing joint for a high-pressure hydrogen gas conveying pipeline, which comprises a male connector seat, a female connector seat and a valve core group, the joint ends of the male connector seat and the female connector seat are respectively provided with lock plates and flange joint plates, the outer periphery of the flange joint plate is provided with wedge locking blocks and screw rods, the opposite surfaces of the lock plate and the flange joint plate are respectively provided with first sealing ring groups and second sealing ring groups, the surface of the lock plate is provided with a sealing gasket, the valve core group comprises a core shaft, a spring, a valve sleeve and a guide head, and a gradually tapered section, a throat section and a gradually expanded section flow channel structure are formed between the valve sleeve and a flow channel. The male connector seat and the female connector seat are quickly locked and connected through the wedge locking blocks, a composite sealing structure is formed through labyrinth sealing and elastic sealing, the static pressure of a joint jointing area is reduced through the Venturi effect, the hydrogen gas leakage driving force is reduced, a multilayer leakage prevention mechanism is formed, and the sealing joint has the advantages of good sealing performance, high connection stability and suitability for high-pressure hydrogen gas conveying working conditions.

The utility model discloses an air fryer which comprises a machine body and a fryer body, a hot air assembly is arranged in the machine body, the hot air assembly comprises a heating piece and a hot air fan, the fryer body is provided with a cooking cavity, the hot air assembly conveys hot air to the cooking cavity to heat food materials, and a reflecting cover arranged above the cooking cavity in a covering mode is further arranged in the machine body. The side wall of the reflection cover is provided with an air inlet, fresh air entering from the air inlet blows to the heating piece, electric fan blades and an air guide cover extending up and down are further arranged in the machine body, and the air guide cover and the reflection cover define a fresh air channel with the cross section being large in the upper portion and small in the lower portion. The utility model provides an air fryer which achieves the effect of actively conveying fresh air into a cooking cavity.

The invention provides a one-way valve. The one-way valve comprises a valve body, a valve port, a supporting piece, a guide sleeve and a valve element. A valve cavity is formed in the valve body; the valve port is formed in the valve cavity and fixed to the valve body. The supporting piece is arranged in the valve cavity and fixed to the valve body, and a fluid channel is formed between the supporting piece and the valve body. The guide sleeve is arranged in the valve cavity and located between the valve port and the supporting piece, the guide sleeve comprises a mounting part and a transition part, the mounting part is fixed to the supporting piece, and the transition part is connected to the mounting part. The valve element is arranged on the guide sleeve and can move in the valve cavity in a reciprocating mode so as to open or close the valve port. A plane perpendicular to the center line of the valve body is defined as a cross section, and the area of the cross section of the transition part is gradually reduced from the valve port to the supporting piece.

This invention discloses a radial flame stabilizer with airflow-assisted jet, comprising an outer wall and an inner wall. Both the outer and inner wall surfaces have V-shaped cross-sections, including a pointed tip and two tail ends. The two corresponding tail ends of the outer and inner wall surfaces are connected by a flow-rectifying wall. An air-guiding groove is provided at the pointed tip of the outer wall, and several injection holes are provided near the tail ends. The air-guiding groove, the interlayer between the outer and inner wall surfaces, and the injection holes form an airflow channel. A fuel injection extension pipe is provided near the tail ends of the inner wall, extending from the inner wall towards the injection holes. The fuel injection extension pipe guides the fuel injection from the injection holes. By introducing a portion of the incoming flow through the air-guiding groove at the stabilizer head, and utilizing the method of coaxial injection of the introduced incoming gas and fuel, the problem of shallow fuel jet depth and difficult evaporation under high-speed, large-flow conditions is improved, resulting in better fuel evaporation and mixing performance compared to conventional radial flame stabilizers.

The application provides a chemical raw material dust absorption device, and relates to the field of dust absorption, which comprises a main air pipe, a plurality of branch air pipes are connected to the bottom of the main air pipe, a self-adapting valve assembly is arranged on the inner side of the branch air pipe, a dust bin in a spherical shape is connected to the other end of the branch air pipe, a venturi pipe is arranged below the dust bin, a transmission assembly for providing power is arranged on the outer side of the throat of the venturi pipe, the transmission assembly is connected with the valve assembly, and the transmission assembly comprises a piston penetrating through the throat of the venturi pipe. The linkage structure of the venturi pipe, the piston, the transmission assembly and the self-adapting valve assembly is arranged, the intelligent distribution of the system air volume is realized, and the energy consumption is significantly reduced. When the dust concentration of a dust production point increases, the airflow velocity of the throat of the venturi pipe is accelerated, the static pressure is reduced, the piston and the transmission shaft are driven to move under the action of the pressure difference, the air valve is automatically opened, and the air volume of the branch is increased.

This utility model discloses a heat exchanger and an air conditioner having the same. The heat exchanger includes a heat exchange section and an inlet section. The heat exchange section has multiple refrigerant channels, and the inlet section includes a main pipe and multiple branch pipes. The branch pipes are connected to the multiple refrigerant channels. The two ends of the main pipe are an upstream end and a downstream end, respectively. The branch pipes are spaced apart along the length of the main pipe and are all connected to the main pipe. The main pipe has a reduced diameter section, and the flow area of ​​the main pipe decreases at the reduced diameter section from the upstream end to the downstream end. At least one branch pipe is arranged upstream and downstream of the reduced diameter section. In the above technical solution, the inlet section has a simple structure, does not require a distributor, occupies little space, is easy to arrange, and can save production and assembly costs. Furthermore, by setting a reduced diameter section in the main pipe of the inlet section, the flow velocity of the refrigerant flowing through the reduced diameter section increases, the dynamic pressure increases, and the static pressure decreases, resulting in a more balanced flow rate in the branch pipes along the main pipe, which is beneficial to improving the heat exchange effect of the heat exchanger.

The utility model relates to the technical field of vehicle air conditioner design, in particular to a vehicle air conditioner face blowing air duct assembly structure which comprises an air inlet duct, a main pipeline, side pipelines, guide plates and air outlet sections, the main pipeline is arranged at one end of the air inlet duct, the side pipelines are arranged on the two sides of the air inlet duct, and the air outlet sections are arranged on the main pipeline and the side pipelines. According to the vehicle air conditioner face blowing air duct assembly structure, the whole air outlet section uses the gradually-shrinking section as an air flow inlet and then sequentially penetrates through the connecting throat pipe and the gradually-expanding section to be discharged out of the air outlet pipe, air flow stably flowing out of the main pipeline and the side pipeline can be accelerated under the action of the convergent angle of the gradually-shrinking section, and meanwhile static pressure is reduced; after air flow penetrates through the connecting throat pipe to reach a flow velocity peak value, kinetic energy is recycled into static pressure under the action of a divergence angle of the diverging section to enable the air flow to flow out stably, fan energy consumption is reduced, resistance reduction is conducted through a longitudinal microgroove regulation and control boundary layer in the process that the air flow penetrates through the diverging section, vortex is prevented from being generated in a pipeline, and noise is reduced. And the noise generated when the whole air duct is used is reduced.