30results about How to "Suitable for a wide range of pressure" patented technology

The invention belongs to the field of oil gas and oil well development, discloses a system for sampling and monitoring components of shaft fluid of a gas field and particularly relates to a system for sampling and monitoring components of the shaft fluid of the gas field and a sampling and analysis method thereof, which are designed aiming at environmental characteristics of a H2S / CO2-containing gas field. A sampling process of a sampler of a gas well is safer, an experimental process is more accurate and quicker, and the application pressure range is wider and safer, and an experimental result of researching the change of high-content hydrogen sulfide gas components is more accurate; and a device is safe and reliable. Through the system and the method, the problems that fluid pressure cannot be obtained and fluid deposit in the shaft cannot be predicted because the measurement cannot be performed in the gas field containing high content of H2S / CO2 can be solved and theoretical basis is provided for a gas well capacity design, production parameter optimization and the formulation of technical measures.

The invention belongs to the field of development of oil and gas wells, and relates to a wellhead sampling device, in particular to a wellhead sampler designed for the characteristic of gas field environment containing high content of H2S / CO2, and a sampling system thereof. The sampling device comprises a sampling valve, a sampling bottle and a pressure reducing valve, wherein two ends of the sampling bottle are in threaded connection with the sampling valve; the external connection of the sampling valve is external-thread clamping sleeve type connection; the pressure reducing valve is used for carrying out pressure reduction and sample injection on high-pressure gas in the sampling bottle; the pressure reducing valve comprises an outer conveying sample injection port which is connected with an outer detector; and the outer conveying sample injection port is a clamping sleeve type connection port so as to eliminate dead angles of pipelines. In the invention, the field sampling for analysis is achieved, the result of experimental analysis has good consistency, the device is safe and reliable, and the corrosion resistance to H2S / CO2 is strong. In the gas field sampler disclosed by the invention, the sampling process is safer, the experimental process is more precise and faster, the applicable pressure range is wider, and more safety is achieved.

The invention provides an excellent-quality steel bar controlled rolling and cooling method and belongs to the technical field of rolled steel production controlled rolling and cooling. The specific technological process comprises the step that controlled rolling and cooling of bars with the specification of the diameter being 12-70 mm adopts short cooling, I section short temperature resetting, short cooling, II section long temperature resetting, short cooling, interrupt cooling and temperature resetting circular control technology. Short cooling adopts a water cooling manner, I section controlled cooling, II section controlled cooling and III section controlled cooling adopt the short cooling manner, and the length of a cooler ranges from 500 mm to 1000 mm. Pressure of cooling water ranges from 0.5 MPa to 1.5 MPa, temperature resetting adopts an air cooling manner, the I section short temperature resetting length is 1000-1800 mm, and the II section long temperature resetting length is 2400-3600 mm. According to the method, on the basis of meeting mechanical performance of bars, the problem that in the traditional controlled rolling and cooling technology, a deeper quenched layer is generated on the surface layer is solved, generation of the quenched martensitic structure of the surface layer is effectively avoided, control over organization types is achieved, meanwhile, better uniformity of the surface layer and heart temperature is ensured, and the surface layer and heart temperature difference is smaller than or equal to 50 DEG C.

The invention relates to a two-way pressure-bearing fluororubber fireproof butterfly valve, which comprise a valve body and a butterfly plate. The valve body is provided with a valve seat; the butterfly plate is provided with a sealing ring which forms a sealing pair with the valve seat, and a pressing plate which clamps and fixes the sealing ring on the butterfly plate from the right side of thesealing ring; the sealing surface of the sealing ring is a front conical surface of which the apex is positioned on the right side; a closed internal gap of a cavity is formed between the sealing ring and the pressing plate; the pressing plate is provided with a pressure guide through hole for communicating the cavity with a space on the right side of the pressing plate; the left side face of thesealing ring is an internal conical surface of which the apex is positioned on the right side and a bus and a central line form an included angle of 90 degrees to beta; and an elastic fireproof ring is arranged in a gap area between the left side face of the sealing ring and the butterfly plate. Through designs of the cavity, the pressure guide through hole and the elastic fireproof ring, the butterfly valve integrates various functions of two-way sealing, fire prevention and fine adjustment, has a simple structure, high manufacturability, low processing difficulty and a wide pressure application range, and is particularly suitable to be used under high pressure.

The invention discloses an integrated cut-off type pressure regulator. The integrated cut-off type pressure regulator is characterized in that the main structure of the integrated cut-off type pressure regulator comprises a regulating part, a balance valve core part, a cut-off part and a valve body. The integrated cut-off type pressure regulator provided by the invention has the advantages that the structure is simple, some module structures are divided, the size is compact, the space occupation is small, the online maintenance is convenient, an air inlet caliber of a product is DN50, an air outlet caliber is DN80, and the flow capacity is large; and a balance valve core structure is adopted, the pressure fluctuation is small, the applicable pressure range is wide, a steel ball affiliated cut-off structure is adopted, the sensitivity of cut-off movement is high, the replication property is good, the pressure setting of the cut-off movement is simple, and the range is wide.

The invention provides a determination method of a mechanical denudation rate of a carbon / carbon composite material. The determination method comprises the following steps: (1) combining utilizing a fiber ablation typical shape with and flow field parameters to obtain a result of fiber force analysis; (2) combiningutilizing the fiber force analysis result, a fiber strength and fracture criterion by utilizing a fiber force analysis result to obtain critical fracture height of fibers; (3) combining an evolution law of a fiber shape and analyzing the denudation frequency of the fibers by using an evolution law of a fiber shape; (4) realizing the calculation of the volume denudation rate of the single fiber by utilizing the critical fracture height and denudation frequency of the fibers; (5) calculating a denudation factor of the single fiber according to the volume denudation rate of the single fiber; (6) calculating the denudation factor of the material by combining utilizing the denudation factor of the single fiber with the volume fraction of the fibers in the material.

The present invention, high pressure water jet multiplex switching control method and multiple position automatic cleaner, features the electrically controlled overflow valve connected serially between the high pressure water pump output pipeline and the high pressure multiway valve for relieving pressure of the pipeline. The electrically controlled overflow valve and the electrically controlled cut-off valve are matched to realize the automatic on-off switching of the pipe branches without need of stopping the high pressure water pump. The present invention realizes protection against high pressure impact to increase the service life of the equipment, has the advantages of simple structure, comprehensive functions, stable performance, reliable control, wide application range, etc, and may be used widely in high pressure water jet cleaning job in coke chemical, metallurgical, chemical and other fields.

The invention discloses an air chamber pressure relief device of a combined type air conditioner unit system. A pressure relief valve is mounted on a vertical plug board between a positive pressure chamber and a negative pressure chamber and a positive pressure chamber and comprises a bonnet, a valve seat, a pulley, a gravity block and a cable; a guide rod is arranged in the middle of the bonnet, a guide pipe is arranged in the middle of the valve seat, and a pressure relief hole is formed in a position on the periphery of the guide pipe, of the valve seat; the pulley is fixed on a support of the valve seat; the valve seat is mounted in the position of the pressure relief hole of the vertical plug board; the bonnet is located on one side of the negative chamber; the guide rod on the bonnet penetrates into the guide pipe on the valve seat; a pulley assembly mounted on the valve seat and the gravity block are located in the positive pressure chamber; one end of the cable is connected to the tail end of the guide rod of the bonnet, and the other end of the cable bypasses the pulley and is connected to the gravity block; and the gravity block is suspended freely. The device can avoid overpressure of the air chamber of the combined type air conditioner unit system, and is simple in structure, convenient to assemble and adjust and reliable in operation.

The invention provides a high-strength magnesium aluminum silicate proppant and a preparation method thereof. The preparation method comprises the following steps: respectively drying, crushing and roasting a raw material containing serpentine minerals, fly ash and coal gangue to obtain powder of the three materials; mixing and grinding the powder of the three materials and an auxiliary agent to obtain mixed material powder; granulating the mixed material powder to obtain a spherical granular green body; and drying and sintering the spherical granular green body to obtain the high-strength magnesium aluminum silicate proppant. The diameter of the high-strength magnesium aluminum silicate proppant ranges from 106 microns to 3350 microns, the sphericity and the roundness are not lower than 0.9, the volume density is 1.3-1.8 g / cm<3>, and the breakage rate under the closing pressure of 86 MPa to 103 MPa is smaller than or equal to 9%. The high-strength petroleum fracturing magnesium aluminum silicate proppant is produced by taking the rock, the barren rock and the tailings which mainly contain serpentine as raw materials, so that resource utilization of various solid wastes is realized.

The invention relates to a trans-critical reciprocating piston compressor taking CO2 as a refrigerant. The trans-critical reciprocating piston compressor taking the CO2 as the refrigerant comprises amachine body, air cylinder covers are arranged on the two sides of the top of a machine main body of the machine body in a staggered mode correspondingly, an air cylinder is arranged inside the machine body, a piston is arranged inside the air cylinder, a bearing seat is installed at one end of the machine body, a motor cover is installed at the other end of the machine body, an inner cavity of the machine body, the bearing seat and the motor cover form a closed cavity, the cavity of the machine body comprises a motor box, a crankcase and a compression cavity, the motor box is located on the side close to the motor cover, the crankcase is located on the side close to the bearing seat, a crankshaft is arranged inside the crankcase, the crankcase is connected with the motor box through the crankshaft, a motor in the motor box drives the crankshaft to do rotary motion, the crankshaft is in transmission connection with the piston, a valve plate is arranged inside the compression cavity, the valve plate is placed at the top of the air cylinder, and when the piston does reciprocating movement, corresponding air suction and exhaust are completed. The efficiency of the piston compressor ishigher than that of a compressor in other form under the working condition of large pressure difference.

The invention relates to a gas supplementation device for an ultrahigh-pressure experimental process. The device comprises a high-pressure storage tank kettle body, a gas inlet pipe, a pressure stabilization and reduction gauge, a gas outlet pipe and a pressure indicator, wherein the gas inlet pipe and the gas outlet pipe are arranged at the top end of the high-pressure storage tank kettle body; a joint connected with a booster pump is arranged at the starting end of the gas inlet pipe; a gas inlet valve is arranged on the gas inlet pipe; a gas outlet valve is arranged on the gas outlet pipe; the gas inlet end of the pressure stabilization and reduction gauge is connected with the gas outlet valve, and the gas outlet end of the pressure stabilization and reduction gauge is connected with the gas outlet pipe; a joint is arranged at the tail end of the gas outlet pipe; a through hole is formed in the top end of the high-pressure storage tank kettle body; a pressure sensor is packaged in the through hole; the pressure indicator is arranged on the lateral surface of the high-pressure storage tank kettle body; the pressure sensor is connected with the pressure indicator through a signal wire. According to the device, gas can be stably supplemented into a high-temperature high-pressure reaction kettle; the device is wide in applied pressure range and particularly applicable to the supplementation of foreign gas in a trace foreign gas-containing ultrahigh-pressure corrosion experimental process.

The invention relates to the field of heat exchange equipment, in particular to a heat exchange plate and application thereof. The adopted technical scheme is that the heat exchange plate of a plate type heat exchanger is characterized by comprising a plate body, wherein the plate body is provided with a pit and a turbulent flow strengthening concave groove. Compared with the prior art, the heat exchange plate has the following advantages and effects that: a heat exchanger comprising the heat exchange plate generates high turbulent flows by using internal fluid of a heat transfer plate, has very high heat transfer efficiency, and has small pressure loss compared with a common plate type heat exchanger; the heat exchange plate has a simple structure, is convenient to process, and is flexible to mount; the heat exchange plate has wide application fields, is suitable for the heat transfer processes such as liquid-liquid heat transfer, gas-liquid heat transfer, gas-solid (powder) heat transfer, liquid-solid (powder) heat transfer and the like, and is particularly suitable for the heat exchange technological process of fluid and powder; and the heat exchange plate has a large application pressure range, and can be suitable for occasions with high, middle, low pressure and negative pressure.

The invention provides an excellent-quality steel bar controlled rolling and cooling method and belongs to the technical field of rolled steel production controlled rolling and cooling. The specific technological process comprises the step that controlled rolling and cooling of bars with the specification of the diameter being 12-70 mm adopts short cooling, I section short temperature resetting, short cooling, II section long temperature resetting, short cooling, interrupt cooling and temperature resetting circular control technology. Short cooling adopts a water cooling manner, I section controlled cooling, II section controlled cooling and III section controlled cooling adopt the short cooling manner, and the length of a cooler ranges from 500 mm to 1000 mm. Pressure of cooling water ranges from 0.5 MPa to 1.5 MPa, temperature resetting adopts an air cooling manner, the I section short temperature resetting length is 1000-1800 mm, and the II section long temperature resetting length is 2400-3600 mm. According to the method, on the basis of meeting mechanical performance of bars, the problem that in the traditional controlled rolling and cooling technology, a deeper quenched layer is generated on the surface layer is solved, generation of the quenched martensitic structure of the surface layer is effectively avoided, control over organization types is achieved, meanwhile, better uniformity of the surface layer and heart temperature is ensured, and the surface layer and heart temperature difference is smaller than or equal to 50 DEG C.

The invention relates to a linear motion transmission structure for a contact, which comprises a movable contact (1), a guide member (2) and a transmission shaft (3), wherein a pass-through sliding cavity is arranged in the guide member (2); the transmission shaft (3) penetrates through the sliding cavity to move back and forth; the movable contact (1) is located at one end of the sliding cavity;the movable contact (1) is movably connected with a relative position of the transmission shaft (3), and the other end is connected with a high-voltage bus and an insulating experimental device; whenthe transmission shaft (3) and the movable contact (1) are connected, the movable contact (1) is driven to move through the transmission shaft (3), thereby switching the test state of the high-voltagebus. Compared with the prior art, when the transmission shaft is connected with the movable contact in the invention, the movable contact is driven to move through the transmission shaft, the test state of the high voltage bus is switched, and random switch can be carried out between two states of a test phase and a grounding phase; meanwhile, the test process can be met only by manual operations, and a complex wiring operation is not needed; the occupied space is small; and the structure is simple.

The invention discloses a reusable electric explosion valve. The reusable electric explosion valve comprises a shell, a valve ball enabling fluid to be output, a transmission mechanism controlling thevalve ball to rotate, a piston driving the electric explosion valve to be opened and an igniter pushing the piston to move are fixedly mounted in the shell from bottom to top, the valve ball is mounted in a fluid channel of the shell, the upper end of the valve ball is connected with the transmission mechanism, the upper end of the transmission mechanism is connected with the piston, and the igniter is arranged at the upper end of the piston and mounted on the upper portion of the shell. According to the reusable electric explosion valve, after the ignition device detonates, the internal structure of the electric explosion valve is not damaged, the electric explosion valve can be reused, meanwhile, the fluid passing through the electric explosion valve is not contaminated, and the reusable electric explosion valve has the beneficial effects of being simple in structure, good in economical efficiency, small in size, light in mass and the like.

The invention relates to a guide rail type separated fluid connector which comprises a plug, a socket, a pin type pipeline, a hole type pipeline and a guide rail, wherein the plug comprises a connecting sleeve and a pull sleeve; rollers are arranged on the pull sleeve; an inclined surface for enabling the rollers to move up is arranged on the guide rail; the socket comprises a housing and a positioning sleeve; a steel ball is arranged on the positioning sleeve; a groove matched with the steel ball is formed in the connecting sleeve; the plug moves up on the guide rail along the inclined surface by virtue of the rollers to pull the pull sleeve to move up; and when the steel ball is extruded from the interior of the groove, the plug is automatically separated from the socket. The guide railtype separated fluid connector has the advantages that by arranging the rollers and the guide rail, when an elastic body is launched, the rollers on the plug are matched with the inclined surface of the guide rail, and move up along the guide rail; when the rollers on the plug are lifted to the certain height, the steel ball is separated from the interior of the groove, so that quick unlocking ofthe plug and the socket is realized; and after unlocking, the plug is separated from the socket, so that the guide rail type separation is realized, and the reliability of the separated pipeline is ensured.

The invention belongs to the field of oil gas and oil well development, discloses a system for sampling and monitoring components of shaft fluid of a gas field and particularly relates to a system for sampling and monitoring components of the shaft fluid of the gas field and a sampling and analysis method thereof, which are designed aiming at environmental characteristics of a H2S / CO2-containing gas field. A sampling process of a sampler of a gas well is safer, an experimental process is more accurate and quicker, and the application pressure range is wider and safer, and an experimental result of researching the change of high-content hydrogen sulfide gas components is more accurate; and a device is safe and reliable. Through the system and the method, the problems that fluid pressure cannot be obtained and fluid deposit in the shaft cannot be predicted because the measurement cannot be performed in the gas field containing high content of H2S / CO2 can be solved and theoretical basis is provided for a gas well capacity design, production parameter optimization and the formulation of technical measures.

The invention belongs to the field of development of oil and gas wells, and relates to a wellhead sampling device, in particular to a wellhead sampler designed for the characteristic of gas field environment containing high content of H2S / CO2, and a sampling system thereof. The sampling device comprises a sampling valve, a sampling bottle and a pressure reducing valve, wherein two ends of the sampling bottle are in threaded connection with the sampling valve; the external connection of the sampling valve is external-thread clamping sleeve type connection; the pressure reducing valve is used for carrying out pressure reduction and sample injection on high-pressure gas in the sampling bottle; the pressure reducing valve comprises an outer conveying sample injection port which is connected with an outer detector; and the outer conveying sample injection port is a clamping sleeve type connection port so as to eliminate dead angles of pipelines. In the invention, the field sampling for analysis is achieved, the result of experimental analysis has good consistency, the device is safe and reliable, and the corrosion resistance to H2S / CO2 is strong. In the gas field sampler disclosed by the invention, the sampling process is safer, the experimental process is more precise and faster, the applicable pressure range is wider, and more safety is achieved.

The invention provides a pressure relief electric explosion valve. The pressure relief electric explosion valve comprises a shell assembly, a piston, a snap ring, a pressure relief pipe device and anigniter. The piston is mounted in the shell assembly. The tail of the piston is fixed through the snap ring to prevent relative movement between the piston and the shell assembly. The igniter is mounted at the tail end of the shell assembly. The shell assembly comprises a shell and a diaphragm. During operation, the igniter pushes the piston to break through the diaphragm to enable fluid to get into the shell. The pressure relief pipe device comprises a steel ball, a spring, a fixed support, a connecting rod, a baffle and a pressure relief shell. When the fluid pushes the steel ball at a certain pressure, the steel ball and the baffle are in linkage to enable part of fluid passes through the steel ball and the baffle to go into an inner cavity of the pressure relief shell. The higher the flow rate of the fluid is, and the less the flow of ingoing fluid is. The output pressure is reduced, and the pressure reduction effect is achieved. When the flow rate of the fluid is slowed down, theflow of the fluid is increased, the output pressure is increased, and the pressure control effect is achieved. The pressure relief electric explosion valve is simple in structure and good in economy and has the characteristics of being small in size, light in weight and the like.

The invention discloses a continuous ultrasonic separation sampling device and method for full-component oil gas with dust under pressure. The separation sampling device comprises a full-component oilgas recovery unit, an ultrasonic separation unit and a solvent recycling unit; the full-component oil gas recovery unit comprises an oil gas washing system and a light oil recovery system, so that recovery of light and heavy oil of the full-component oil gas and gas sampling are completed. The ultrasonic separation unit comprises an ultrasonic separator, a solid collecting tank, a liquid collecting tank and a full-component oil collector and is used for achieving the complete separation of the full-component oil and dust and the collection of the full-component oil. The sampling device is organically coupled with an ultrasonic separation system through a special oil-gas collection process, so that collection and sampling of full-fraction light and heavy oil in various high-temperature andhigh-pressure process gases are ensured, sampling accuracy and representativeness are ensured, the process is flexible, the adaptability is high, and the effects of high efficiency, energy conservation and environmental protection are achieved.

The invention discloses a micro-flow detector and a detection method thereof and belongs to the technical field of fluid detection. The micro-flow valve comprises an outer shell, a sensor and a micro-flow valve body, the micro-flow valve body is installed in the outer shell and comprises a valve body shell, a liquid pipe connector, a spring and a valve element set, a loop communicated end to end is machined in the valve body shell, and a left side opening and a right side opening are machined in the two opposite angles of the loop respectively and communicated with the outside. The left side opening and the right side opening are each provided with a liquid pipe connector, one end of each liquid pipe connector is connected with the valve element set through a spring in the loop, the other end of each liquid pipe connector penetrates through the outer shell, and sensors are installed on the outer side walls, corresponding to the other two opposite corners, of the loop except the two opposite corners communicated with the outside. According to the invention, bidirectional flow detection can be realized in the same pipeline, the detector is suitable for detection of fluid flow conditions and very sensitive reflection of trace leakage at the same time, and leakage conditions in the system can be effectively tested.

The invention relates to a two-way pressure-bearing fluororubber fireproof butterfly valve, which comprise a valve body and a butterfly plate. The valve body is provided with a valve seat; the butterfly plate is provided with a sealing ring which forms a sealing pair with the valve seat, and a pressing plate which clamps and fixes the sealing ring on the butterfly plate from the right side of thesealing ring; the sealing surface of the sealing ring is a front conical surface of which the apex is positioned on the right side; a closed internal gap of a cavity is formed between the sealing ring and the pressing plate; the pressing plate is provided with a pressure guide through hole for communicating the cavity with a space on the right side of the pressing plate; the left side face of thesealing ring is an internal conical surface of which the apex is positioned on the right side and a bus and a central line form an included angle of 90 degrees to beta; and an elastic fireproof ring is arranged in a gap area between the left side face of the sealing ring and the butterfly plate. Through designs of the cavity, the pressure guide through hole and the elastic fireproof ring, the butterfly valve integrates various functions of two-way sealing, fire prevention and fine adjustment, has a simple structure, high manufacturability, low processing difficulty and a wide pressure application range, and is particularly suitable to be used under high pressure.

The invention discloses a high-temperature-resistant self-sealing gas cylinder comprising an inner container, a composite material winding layer, an elastic layer and a heat insulation layer from inside to outside, the inner container comprises an inflation and deflation connector part at the front end and an inner container body, and the inner container body and a shell of the inflation and deflation connector part at the front end are connected in a welded mode to form the inner container; the inflation and deflation connector part comprises a spring, a valve element, a piston and a rubber ring, one end of the spring is installed in a clamping groove in the inner container body, the other end of the spring is connected with the valve element, the valve element is pressed against the inclined face of the shell of the inflation and deflation connector at the front end of the inner container through elastic force of the spring, and the non-outlet conical face end of the piston makes contact with the valve element. The valve element is pushed to move through the movement of the piston. According to the high-temperature-resistant self-sealing gas cylinder, the gas cylinder can work in a high-temperature environment, and the high-temperature-resistant self-sealing gas cylinder has the characteristics of being simple in structure, good in economical efficiency, small in size, light in weight and the like.

The invention discloses a testing device and testing method for pressurized column leaching of uranium ore by means of CO2 and O2. The testing device comprises a liquid storage tank and a leaching column. A water inlet pipe connector, an O2 inlet pipe, a CO2 inlet pipe and a first pressure gauge connector are arranged on an upper end plate of the liquid storage tank, wherein the water inlet pipe connector, the O2 inlet pipe, the CO2 inlet pipe and the first pressure gauge connector are provided with ball valves. A first pressure gauge is installed on the ball valve of the pressure gauge connector. A liquid outlet pipe connector is arranged at the lower end of the cylinder wall of the liquid storage tank. The leaching column comprises a cylinder and an end cover. The end cover is connected with the cylinder through bolts. A liquid inlet pipe connector and a second pressure gauge connector which are provided with ball valves are arranged on the end cover. The ball valve on the liquid inlet pipe connector is connected with a liquid outlet connector on the liquid storage tank through a pipeline. A second pressure gauge is installed on the ball valve of the second pressure gauge connector. A right-angled ball valve, a pressure reducer and the ball valves are sequentially connected with the liquid outlet pipe connector of the leaching column. During testing, the liquid storage tank is fixed to an oscillator, a CO2 steel cylinder and an O2 steel cylinder are connected with the liquid storage tank, a uranium ore sample is placed into the leaching column, a leaching solution is prepared, and the uranium ore sample is leached through the leaching solution.

The invention discloses a device and method for continuous ultrasonic separation and sampling of dust-laden full-component oil and gas under pressure. The separation and sampling device and method include a full-component oil and gas recovery unit, an ultrasonic separation unit and a solvent circulation recovery unit; Oil and gas washing system, light oil recovery system, complete the recovery of light and heavy oil and gas sampling of full-component oil and gas; ultrasonic separation unit includes ultrasonic separator, solid collection tank, liquid collection tank, full-component oil collector, Complete the complete separation of full-component oil and dust and the collection of full-component oil; the sampling device is organically coupled with a special oil and gas collection process and an ultrasonic separation system to ensure that all fractions of light and heavy components in various high-temperature and high-pressure process gases The collection and sampling of oil ensures the accuracy and representativeness of sampling, the process is flexible, and the adaptability is wide, achieving the effects of high efficiency, energy saving and environmental protection.

The invention discloses a high-pressure water jet multi-channel switching control method and a high-pressure water jet multi-station automatic cleaning device. It is characterized in that an electric control overflow valve capable of releasing the pressure in the pipeline is connected in series between the output pipeline of the high-pressure water pump and the high-pressure multi-way valve block. Under the condition that the high-pressure water pump does not have to stop working, the automatic on-off switching between the branches is realized through the mutual cooperation of the electric control overflow valve and the electric control stop valve. An unloading link is added before each action of the electric control globe valve, that is, the electric control overflow valve must first return to the overflow state, so that the electric control globe valve operates under low pressure, realizes anti-high pressure impact protection, and improves the service life of the equipment. It has the advantages of simple structure, complete functions, stable performance, reliable control and wide applicable pressure range. It has good promotion and use value. It is mainly used in high-pressure water jet cleaning and operation in coking, metallurgy, chemical industry, mining and other fields.