81results about How to "Play a throttling role" patented technology

The invention belongs to the technical field of rice transplanters, and particularly relates to a multifunctional valve used for controlling a seedling table of a rice transplanter to rise and fall. The multifunctional valve used for controlling the seedling table of the rice transplanter to rise and fall comprises a reversing valve, a shuttle valve, a hydraulic-control one-way valve, a stop valve, a one-way throttling valve and a lifting oil cylinder, wherein the reversing valve, the shuttle valve, the hydraulic-control one-way valve, the stop valve, the one-way throttling valve and the lifting oil cylinder are connected in sequence. The reversing valve is a five-position and four-way reversing valve. A first oil outlet of the reversing valve communicates with a first oil port of the shuttle valve and a main oil path of the hydraulic-control one-way valve. A second oil outlet of the reversing valve communicates with a second oil port of the shuttle valve and an auxiliary oil port of the hydraulic-control one-way valve. An unloading valve is connected to an oil outlet of the shuttle valve. A throttling pressure-relief hole communicating with the auxiliary oil port of the hydraulic-control one-way valve is formed in the hydraulic-control one-way valve and is connected with an oil tank. The reversing valve has a rising position, a throttling rising position, a middle position, athrottling falling position and a falling position. An oil outlet of the one-way throttling valve communicates with a cavity of the lifting oil cylinder, and the other cavity of the lifting oil cylinder communicates with the oil tank. The reversing motion of the reversing valve controls the lifting oil cylinder to rise and fall.

The invention discloses an oil cylinder driving mechanism with a buffer function for a clamp, comprising a clamp body, wherein an oil cylinder is arranged on the clamp body; a left end cover is arranged at one end of the oil cylinder; a right end cover is arranged at the other end of the oil cylinder; a left cavity is arranged at one end of a rack piston matched with the oil cylinder and is communicated with a left oil port on the left end cover; a right cavity is arranged at the other end of the rack piston and is communicated with a right oil port on the right end cover; a left end cover inner cavity is arranged on the inner side of the left end cover; the left end of the rack piston is connected with a plunger piston which is matched with the left end cover inner cavity; the left cavity is communicated with the left oil port through the left end cover inner cavity; a one-way valve is arranged between the left oil port and the left cavity on the left end cover; a valve core hole is formed in the left end cover by processing; a valve core is connected with an internal thread of the valve core hole; a communicating hole is formed in the left end cover by processing and is communicated with the left cavity, the valve core hole and the left end cover inner cavity; the internal thread of the valve core hole is connected with a fastening bolt; and a screed plug with a sealing ringis arranged at the port of the valve core hole. The rack piston is buffered when approaching to the left end in the work process and the phenomenon that the tail end is impacted is overcome; and the oil cylinder driving mechanism has better stable performance.

A parallel flow heat exchanger and a room air conditioner, the parallel flow heat exchanger includes a flat tube arranged between an input header and an output header, the flat tube is provided with fins, and one end of the input refrigerant tube is connected to the input The headers are connected, and one end of the output refrigerant pipe is connected with the output header. More than one first positioning hole is arranged on the side wall of the input header, and one end of the input refrigerant pipe is inserted into the first positioning hole. One end of the input refrigerant pipe is closed, and one end of the input refrigerant pipe is provided with more than one first small hole communicating with the inside of the input header; and / or, the side wall of the output header is provided with more than one first small hole Two positioning holes, one end of the output refrigerant pipe is inserted into the second positioning hole, and one end of the output refrigerant pipe is closed. The invention has the characteristics of simple and reasonable structure, flexible operation, small flow resistance, uniform refrigerant distribution and wide application range.

The invention discloses a cylinder head gasket throttle assembly. The cylinder head gasket throttle assembly comprises water holes, a notch which is communicated with the corresponding water hole is formed in the edge of every water hole, and the inside of every notch is connected with a clamping hook bar; the cylinder head gasket throttle assembly further comprises throttle pieces which are in clearance fit with the insides of the water holes, a throttle hole with a diameter smaller than that of the water hole is formed in every throttle piece, and every throttle piece is connected with a clamping hook which is matched with the notch and can be clamped onto the corresponding clamping hook bar. The throttle piece which is in clearance fit with the inside of the corresponding water hole can throttle cooling water inside a water jacket to reduce the water flow entering the cylinder head from a cylinder body. The cylinder head gasket throttle assembly can adjust the size of the throttle holes on the throttle pieces according to water jackets of different positions of an engine, and accordingly enables cooling water capacities of all the water jacket to tend to be equal, guarantees that the engine is cooled evenly, and prolongs the service life of the engine. The invention also discloses a cylinder head gasket comprising the cylinder head gasket throttle assembly.

The invention discloses an engine. The engine comprises a cylinder cover, a driving part mounted on the cylinder cover, and a flow deflector (21) connected with the driving part, wherein an air inlet passage (22) is arranged on the cylinder cover; an air inlet valve (24) is arranged at the tail end of the air inlet passage (22); the flow deflector (21) is positioned in the air inlet passage (22), and has a flow deflecting course and a return course under the effect of the driving part; the flow deflecting course points to the middle space of the air inlet passage (22) from the inner wall of the air inlet passage (22); the return course points to the inner wall of the air inlet passage (22) from the middle space of the air inlet passage (22). The air scavenging in a combustion chamber of the engine is sufficient, so that the power of the engine is improved, and the oil consumption of the engine is reduced. The invention further discloses an automobile.

The invention relates to a three-tube heating recycling air-conditioning system control method and an air-conditioning system. The three-tube heating recycling air-conditioning system control method includes the following steps that step 1, the inlet water temperature T1 and the outlet water temperature T2 of a water heat exchanger are detected in real time; step 2, the T1 and the T2 are compared with a set first low temperature t1, when the inlet water temperature T1 or the outlet water temperature T2 is smaller than or equal to the first low temperature t1, air-conditioning system heating is stated, and water in the water heat exchanger is heated; step 3, when it is detected the inlet water temperature T1 or the outlet water temperature T2 reaches the set high temperature t2, air-conditioning system heating is ended, and the air-conditioning system restores to the previous standby state. By means of the three-tube heating recycling air-conditioning system control method and the air-conditioning system, the situation that water in the water heat exchanger of a heat recycling device is frozen under the low temperature, and thus system operation reliability is affected can be effectively prevented.

The invention provides a cold plate and a refrigerating system. The cold plate comprises an inlet pipe, an outlet pipe and a multi-layer entity formed by combining plates based on a multi-layer thin plate, wherein the multi-layer entity sequentially comprises at least one upper cover plate piece, at least one upper chamber plate piece, at least one middle plate piece, at least one lower chamber plate piece and at least one heat conduction plate piece from top to bottom, the upper chamber plate piece forms a hollow flow storage chamber, the middle plate piece forms a slender throttling groove channel, and the lower chamber plate piece forms a hollow evaporation chamber. The refrigerating system comprises the cold plate, a compressor, a condenser, a condensing fan, a connecting pipeline, a refrigerant, a clamping device and the like. When the compressor works, the high-pressure liquid refrigerant enters a liquid storage chamber through the inlet pipe, is throttled and depressurized through the throttling groove channel, generates the spray jet flow in the evaporation chamber, impacts the heat conduction plate piece and takes away heat of a heating element in contact with a lower surface of the heat conduction plate piece. The cold plate is advantaged in that the cold plate is compact in structure and high in heat flux density, and a heating element can be cooled to be below the environment temperature.

The invention discloses a three-way non-return speed control valve. The three-way non-return speed control valve comprises a valve body, the valve body is provided with an A opening, a T opening and aP opening, a pressure compensation valve element is arranged in the valve body, the pressure compensation valve element is provided with a first through-flow hole, the upper portion of the pressure compensation valve element is provided with a throttle valve pocket, the throttle valve pocket is provided with an orifice, a second through-flow hole and a third through-flow hole, and a control spring is arranged between the throttle valve pocket and the pressure compensation valve element; the lower portion of the pressure compensation valve element is provided with a bush, a spring seat and a one-way spring, a through-flow cavity is formed between the throttle valve pocket and the valve body, the orifice is communicated with the A opening through the through-flow cavity, a control cavity isformed between the pressure compensation valve element, the spring seat, the bush and the inner wall of the valve body, and the control cavity is communicated with the P opening. The three-way non-return speed control valve has the advantages that the structure is simple and compact, the volume is small, the function of one-way speed regulation can be completed, and the pressure compensation cankeep the flow constant.

The invention discloses a production method of floors capable of being quickly installed in a side sliding mode, and belongs to the technical field of floor production. The production method includesthe following steps that step 1, floor blanks are sorted; step 2, the floor blanks are subjected to curing; step 3, the floor blanks are subjected to sanding; step 4, the floor blanks are subjected tothickness setting; step 5, the floor blanks are subjected to surface treatment; step 6, the floor blanks are subjected to length setting and molding processing; step 7, the floor blanks are sprayed with anti-cracking oil; step 8, the floor blanks are plastic-packaged; step 9, the floor blanks are painted with back paint; and step 10, the floor blanks are painted or painted with vegetable oil. After injection molding, lock catch frames are hidden under bosses of the floor blanks, and lock catches are high in dimensional accuracy and firmly assembled.

The invention discloses an application method of a negative pressure control system. The negative pressure control system and the application method thereof are included. The negative pressure controlsystem comprises a negative pressure sensor, an air valve, an air valve controller, a variable frequency fan and a controller. The negative pressure sensor is used for detecting the negative pressurevalue inside an air supply system pipe. The air valve is arranged in the pipe and plays a throttling role. The air valve controller is used for adjusting the open degree of the air valve. The variable frequency fan is arranged at one end of the pipe and used for forming the negative pressure in the pipe. A signal input end of the controller is connected with the negative pressure sensor, and a signal output end of the controller is connected with the variable frequency fan and the air valve controller. By means of the negative pressure control system, the negative pressure inside the system can maintain consistent basically, and thus consistency of product quality is guaranteed; high-frequency working duration of the fan is shortened; the service life of the fan is prolonged; and energy consumption is lowered.

The invention discloses an inserting installation type one-way speed regulating valve. A valve body is included; the lower end of the valve body is provided with a screw plug; the center of the screwplug is provided with a port P; the side wall of the valve body is provided with a port A and a port T; a pressure compensating valve element is arranged in the valve body; the side wall of the lowerportion of the pressure compensating valve element is provided with a through hole; the pressure compensating valve element slides upwards, and can control the opening degree of the port A and communicate the port P with the port T through the through hole; the center of the pressure compensating valve element is provided with a one-way valve element; the center of the one-way valve element is provided with a through flow hole; a first spring is arranged between the one-way valve element and the screw plug; a bush is arranged above the pressure compensating valve element, and is provided witha through flow groove communicated with a port B; a throttling valve sleeve is arranged in the upper portion of the valve body; the lower end of the throttling valve sleeve is provided with a valve port matched with the one-way valve element; a through flow cavity is formed between the outer wall of the throttling valve sleeve and the inner wall of the valve body; the throttling valve sleeve is provided with a throttling groove communicated with the through flow cavity; and a second spring is arranged between the bush and the throttling valve sleeve. The inserting installation type one-way speed regulating valve has the beneficial effects of being simple and compact in structure and small in volume, and flow can be kept constant by means of pressure compensating.

The invention discloses a mixing device for feed for raising chicken and ducks. The mixing device comprises a bottom plate, wherein the top part of the bottom plate is fixedly connected with a shell;a first opening is formed in the right side of the top part of the shell; a stirring tank is arranged in an inner cavity of the shell; pulleys are fixedly arranged at four corners of the bottom part of the stirring tank; the pulleys are connected with the bottom part of the inner cavity of the shell in a sliding way; the left side of the top part of the stirring tank is communicated with a feedingcabin; the left side of the top part of the stirring tank is communicated with a feeding hopper. According to the mixing device disclosed by the invention, through the arrangement and the matching use of the bottom plate, the shell, the first opening, the stirring tank, the pulleys, the feeding cabin, the feeding hopper, a transmission mechanism, a gear rack, a transmission box, a framework, a first motor, a stirring rod and stirring blades, the problem that sufficient stirring cannot be carried out by an existing feed stirrer is solved; the mixing device for the feed for raising the chickenand the ducks, disclosed by the invention, has the advantage that feed stirring is uniform, and is convenient to digest feed by animals, and the practicability of a stirrer is improved.