45results about How to "With pressure relief function" patented technology

The invention provides a numerical control rolling machine tool for outer circle rolling machining of a torsion shaft. The numerical control rolling machine tool comprises a machine tool body, an outer circle rolling head, a dual centre locating device, a shifting fork connecting part, an internal spline clamp sleeve, a full closed protection cover, a displacement measurement system, a precise oilmist cooling system, a numerical control system and a hydraulic system. The outer circle rolling head of the machine tool adopts a multi-rolling-wheel symmetric rolling device structure, and when outer circle rolling machining of the torsion shaft is carried out, a workpiece bears multiple equal pressures in the radiation direction; a displacement sensor is mounted in a hydraulic cylinder of theouter circle rolling head, the change value of the rolling diameter in the outer circle rolling process is worked out through the rolling cylinder displacement value fed back by the displacement sensor, and intelligent judgment on the limiting position of the outer circle rolling arc end can be achieved; and the shifting fork connecting part replaces a traditional chuck, a transmission structure is optimized, meanwhile, worker operation is more convenient, the machine tool is more suitable for streamlined production operation, and the rolling machining efficiency is higher.

Disclosed is a backflow preventer comprising a housing which is provided with an inlet port, an outlet port, and at least one leakage opening that is located between said ports. The housing accommodates two first check valves which are arranged one behind the other. The first check valve is movably retained for opening or blocking a flow connection between an intermediate space of the housing and the leakage opening. In order to prevent, in a simple structural manner, the pressure from unduly increasing in the area of the outlet port, the housing encompasses an inner housing and an outer housing. The outer housing is provided with the at least one leakage opening while the inner housing accommodates the two check valves and is retained within the outer housing so as to be movable in the direction of flow. Furthermore, the inner housing comprises an outlet port via which the flow connection between the intermediate space and the leakage opening can be established regardless of the position of the inner housing by displacing the first check valve.

The invention provides a hydrocarbon resistance fire-proof and explosion-proof coating which is prepared from, by weight, 20-60 parts of emulsion powder, 0-20 parts of polyvinyl alcohol, 1-3 parts of hydrogenated castor oil, 15-35 parts of polyvalent alcohol phosphate flame retardant, 5-13 parts of melamine cyanurate, 4-16 parts of zinc borate, 3-6 parts of modified expanded vermiculite and 0-2 parts of rutile type nanometer titania. The coating is high in hydrocarbon fire resistance limit, also has the explosion resistance, can adhere to a base material in the good condition after an explosion happens, enables a coating film to have the pressure relief function in the explosion, and is good in adhesion force, high in strength, capable of withstanding influences of high and low temperature cycling, good in water resistance, acid-base resistance, salt corrosion resistance and weather resistance, good in flexibility, not prone to disengagement, stable in storage, long in service life, environmentally friendly, convenient to construct, low in construction cost, simple in preparation technology and low in energy consumption. The hydrocarbon resistance fire-proof and explosion-proof coating is particularly suitable for being used as surface coatings of steel materials, aluminum materials and other materials in indoor and outdoor petrochemical industries.

The invention provides a large-flux hydraulic two-step pressure regulation distributor, comprising a low pressure loop, a high pressure loop, a hydraulic system interface, and an oil tank interface; the low pressure loop and the high pressure loop are respectively connected with the hydraulic system interface and the oil tank interface; the lower pressure loop comprises insertion valves 1, 6, electromagnetic conversion valves 7, 5.1, and 5.2 and a pressure reducing valve 4; the electromagnetic conversion valves 5.1 and 5.2 are respectively connected with the insertion valves 1 and the pressure reducing valve 4; the electromagnetic conversion valve 7 is connected with the insertion valve 6; the high pressure loop comprises insertion valves 9.1 and 9.2 and electromagnetic conversion valves 8.1 and 8.2; the electromagnetic conversion valves 8.1 and 8.2 are respectively connected with the insertion valves 9.1 and 9.2; the hydraulic system interface is provided with an oil filter 3. The invention has two-step high pressure and low pressure regulation function and pressure releasing function, which can implement the smooth shift between a high pressure and a low pressure.

The invention discloses an L-CNG (Liquid-Compressed Natural Gas) skid-mounted device without energy consumption. The L-CNG skid-mounted device is characterized in that: a low-temperature heat-insulation storage tank V001 is communicated with a low-temperature high-pressure spherical storage tank V002 and a low-temperature high-pressure spherical storage tank V003 through pipelines; an LNG (LiquidNatural Gas) high-pressure booster V004 is correspondingly arranged on the low-temperature high-pressure spherical storage tank V002; an LNG high-pressure booster V005 is correspondingly arranged on the low-temperature high-pressure spherical storage tank V003; output ends of the low-temperature high-pressure spherical storage tank V002 and the low-temperature high-pressure spherical storage tankV003 are connected with an LNG high-pressure air temperature type gasifying device V006 through pipelines; and the LNG high-pressure air temperature type gasifying device V006 is respectively connected with a CNG (Compressed Natural Gas) low-pressure gas storage bottle group or a gas storage well V007, a CNG middle-pressure gas storage bottle group or a gas storage well V008, and a CNG high-pressure gas storage bottle group or a gas storage well V009. The L-CNG skid-mounted device can convert the liquid natural gas into the compressed natural gas without using a high-voltage pump. The production cost is greatly reduced for an owner of a gas station, so as to save energy sources for a country.

The invention discloses a household pure water machine which is mainly composed of an intake tee joint (15), a pressure-limiting valve (21), a first-stage filter cylinder (13), a front water breaking solenoid valve (12), a booster pump (11), a second-stage filter cylinder (10), a third-stage filter cylinder (9), a reverse osmosis filter cylinder (5) and a rear filter barrel (2), which are all interconnected in sequence. The pure water machine is characterized in that a water-saving drainage and flush solenoid valve (18) provided with a water inlet (101) and a concentrate collecting port (115), and a mixed water storage barrel (20) provided with a mixed water outlet (213) and an original water port (214) are arranged between a concentrated water outlet end of the reverse osmosis filter cylinder (5) and the waterways of the pressure-limiting valve (21) and the front water breaking solenoid valve (12). In the process of operating for water-making, the household pure water machine of the invention can automatically recycle the generated concentrated water, preferentially utilize the recycled concentrated water while using tap water and can automatically replenish the tap water after the concentrated water is used up.

The invention relates to a pressure relief joint and a liquid cooling component using the same in order to guarantee the leakproofness of the liquid cooling component in normal work. The pressure relief joint comprises a joint seat which is hermetically installed on a cooling liquid chamber body; the joint seat is provided with a pressure relief passage which communicates with the inside of the cooling liquid chamber body; the pressure relief joint further comprises a pressure relief valve core which is movably installed inside the joint seat in a guiding manner; the pressure relief valve corecomprises a sealing position and a pressure relief position, wherein the sealing position is positioned in a movement stroke and is used for sealing the pressure relief passage; the pressure relief position is used for opening the pressure relief passage; the pressure relief joint further comprises a locking part which is used for matched with the pressure relief valve core in a stop manner in order to keep the pressure relief valve core at the sealing position; the locking part is detachably installed or movably installed on the joint seat; and the locking part which is movably installed onthe joint seat comprises an avoiding position which is separated from the pressure relief valve core in a stop manner. By additionally arranging the locking part, the pressure relief joint has the pressure relief function without affecting the normal use of the liquid cooling component, and does not cause leakage of cooling liquid.

The invention discloses an electric hot-water bag with the pressure relief function. The electric hot-water bag is composed of a bag body, a heating element and a pressure relief element. The bag body, the heating element and the pressure relief element are fixedly connected in a sealed mode. The pressure relief element is composed of a pressure valve, an alarm, a pressure relief hole and a replaceable activated carbon cover. The longitudinal section of the pressure relief hole is trapezoidal, a large opening of the pressure relief hole stretches to the surface outside the bag body, a small opening of the pressure relief hole is formed inside the bag body, a fixed stop dog and an elastic blocking piece are located on the small opening, the fixed stop dog and the elastic blocking piece are fixedly connected with the pressure relief hole, the pressure valve is arranged between the fixed stop dog and the elastic blocking piece, the activated carbon cover is connected with the large opening of the pressure relief hole in a threaded sealing mode, the activated carbon cover is composed of a cover edge and an elastic cap, the alarm is arranged on the pressure valve, and when the pressure valve goes beyond the elastic blocking piece, an alarm can be given automatically.

The invention provides a mechanical supercharger structure with a decompression function, applied to the technical field of engine superchargers. According to the mechanical supercharger structure, an input shaft gear (10) on an input shaft (2) is meshed with a driving shaft gear (15) on a driving shaft (19); the driving gear (16) coaxial connected with the driving shaft gear (15) is simultaneously meshed with a driven gear (1) on a driven shaft (20); the input shaft (2) is provided with an axial decompression hole (5); one end of the axial decompression hole (5) is communicated with a lubricating oil cavity (23), and the other end of the axial decompression hole (5) is communicated with the outside; and the axial decompression hole (5) is provided with a decompression valve (1) capable of regulating the pressure inside the lubricating oil cavity (23). By the mechanical supercharger structure with the decompression function disclosed by the invention, the pressure inside the lubricating oil cavity of a mechanical supercharger can always be kept within a reasonable scope; and the supercharger structure has the characteristics of being stable and reliable in decompression, and good in oil-gas separation effect.

The invention provides a pneumatic nailing gun, and belongs to the technical field of electric tools. Through the pneumatic nailing gun, the problem that in order to enable a power piston to be unlocked more stably and reliably, the nailing strength of an existing pneumatic nailing gun is difficult to adjust is solved. The pneumatic nailing gun comprises a shell, wherein a pressurizing cylinder body and a power cylinder body are arranged in the shell, a pressurizing piston is arranged in the pressurizing cylinder body, a power piston capable of being locked when the pressurizing piston pressurizes an inner cavity is arranged in the power cylinder body, a motor can unlock the power piston when the pressurizing piston completes a pressurizing stroke, a pressure relief channel is formed between the power piston and the power cylinder body, the pneumatic nailing gun further comprises a rotational speed control module capable of controlling the rotational speed of the motor, the rotational speed control module adjusts the time required for the pressurizing piston to complete the pressurizing stroke by controlling the rotational speed of the motor, and the rotational speed control module can control the motor to output at least two different rotational speeds. The pneumatic nailing gun can control the nailing strength through the rotational speed of the motor.

The invention provides a circuit selection valve with a pressure relief function. A valve hole is formed in a valve body, and a left pressure relief chamber and a right pressure relief chamber are formed in the valve hole. A first oil port, a second oil port, a third oil port, a fourth oil port, a fifth oil port and sixth oil port are formed in the valve body. The left pressure relief chamber is connected with the second oil port through a first one-way valve, and the right pressure relief chamber is connected with the fifth oil port through a second one-way valve. A valve element is arrangedin the valve hole in a mode of moving left and right, and a flowing hole, a first pressure relief hole, a second pressure relief hole, a third pressure relief hole and a fourth pressure relief hole are formed in the valve element. A left end cover is detachably arranged on the valve body and is used for closing the left end of the valve hole. The left end of an elastic piece is butted against theright end of the left end cover, and the right end of the elastic piece is butted against the left end of the valve element. An electromagnet is detachably arranged on the valve body and is used for closing the right end of the valve hole, and the left of the push rod of the electromagnet directly faces to the right end of the valve element. The circuit selection valve has the advantages of simplestructure, low cost and convenience in mounting.

The invention discloses a ball valve with a pressure relief function. The ball valve comprises a ball valve body, the outer surface of the ball valve body is fixedly connected with a first threaded connector, the outer surface of the first threaded connector is in threaded connection with a piston barrel, and the lower portion of the outer surface of the piston barrel is fixedly connected with a second threaded connector. An inner cavity of the second threaded connector is in threaded connection with a pressure gauge, a pressure discharging device is fixedly connected to the outer surface of the piston barrel, a piston device is installed in an inner cavity of the piston barrel, and an adjusting device is fixedly connected to the upper end face of the piston device. The invention relates to the technical field of ball valves with the pressure relief function. According to the ball valve with the pressure relief function, the problems that due to the fact that a traditional ball valve is inconvenient to install and detach during pressure relief, later maintenance is inconvenient, the maintenance cost is high, and meanwhile the ball valve is likely to be damaged are solved.

The invention provides a preparation method of latex-imitated polyurethane sponge, wherein the preparation method comprises the steps: reacting polysiloxane, a cross-linking agent and polyisocyanate to obtain a prepolymer component B by adopting a semi-prepolymer method, uniformly mixing polyether polyol X, deionized water, silicone oil and a catalyst to obtain a component A, finally stirring and mixing the component A and the prepolymer component B at a high speed, and reacting to obtain the latex-imitated polyurethane sponge. Too many auxiliaries are not needed, and the prepared latex-imitated polyurethane sponge has excellent weather resistance, air permeability, low temperature resistance, excellent physical performance and comfortable hand feeling and can be washed with water to be kept clean after being used for a long time; and according to the preparation device of the latex-imitated polyurethane sponge, intelligent feeding is achieved, reaction conditions are accurately controlled, the stability of a polyurethane sponge product is improved, the production efficiency is improved, energy consumption is reduced, and the production efficiency and the production quality are improved.

The invention discloses a variable displacement oil pump with a pressure relief groove. An oil pump oil outlet cavity and an oil pump oil absorption cavity are arranged on a pump body and a pump cover, an adjusting ring is arranged in the pump body, a protrusion is arranged on the outer circumference of the adjusting ring, the radial outer end face of the protrusion is in sealed connection with an inner cavity, the protrusion is provided with a first side and a second side along the circumference, the first side is towards a pressure control cavity communicated with the oil pump oil outlet cavity, the second side is connected with an adjusting mechanism, the protrusion is provided with a third side and a fourth side in the radial direction, the third side is in sealed connection with the pump body, the fourth side is in sealed connection with the pump cover, the pump cover is further provided with the pressure relief groove, one end of the pressure relief groove is communicated with the oil pump oil absorption cavity, and the other end of the pressure relief groove is arranged at the position of the fourth side corresponding to the pump cover. The characteristic that the change of the adjusting ring of the variable displacement oil pump is changed along with oil pressure changes is utilized to control whether the pressure relief groove is communicated with the pressure control cavity, and a pressure relief function of an ordinary oil pump pressure relief groove is achieved.

The invention discloses a high-stability crotch supporting device with a pressure relief function for the obstetrics and gynecology department, and the device comprises a base body, a two-way lead screw, a fixed base, a micro motor and a connecting shaft; the two-way lead screw is installed on the inner side of the base body in a nested mode, the middle end of the two-way lead screw is fixedly connected with a butt joint handle, and the butt joint handle is connected with the inner side of the base body; a preset groove is formed in the upper end of the base body, a movable part is installed on the inner side of the preset groove in a nested mode, and a guide part is fixedly connected to the outer side of the movable part. According to the high-stability type crotch supporting device with the pressure relief function for the obstetrics and gynecology department, the fixed base abutting against the inner side of the thigh of a patient stably drives a butt joint disc to rotate through a preset micro motor, so the butt joint disc pushes a nested part and a conductive layer which are in contact to synchronously and spirally rotate through repulsive force between magnet parts with the same magnetic poles, and the conductive layer in a connected state is matched to perform pressure relieving work of electrotherapy and massage on the inner sides of the thighs of the patient, so the emotion is prevented from being too nervous.

The invention provides a hydrocarbon resistance fire-proof and explosion-proof coating which is prepared from, by weight, 20-60 parts of emulsion powder, 0-20 parts of polyvinyl alcohol, 1-3 parts of hydrogenated castor oil, 15-35 parts of polyvalent alcohol phosphate flame retardant, 5-13 parts of melamine cyanurate, 4-16 parts of zinc borate, 3-6 parts of modified expanded vermiculite and 0-2 parts of rutile type nanometer titania. The coating is high in hydrocarbon fire resistance limit, also has the explosion resistance, can adhere to a base material in the good condition after an explosion happens, enables a coating film to have the pressure relief function in the explosion, and is good in adhesion force, high in strength, capable of withstanding influences of high and low temperature cycling, good in water resistance, acid-base resistance, salt corrosion resistance and weather resistance, good in flexibility, not prone to disengagement, stable in storage, long in service life, environmentally friendly, convenient to construct, low in construction cost, simple in preparation technology and low in energy consumption. The hydrocarbon resistance fire-proof and explosion-proof coating is particularly suitable for being used as surface coatings of steel materials, aluminum materials and other materials in indoor and outdoor petrochemical industries.

The invention discloses a self-adaptive physical therapy pillow with a pressure relieving function for neurology department and a pressure relieving method of the self-adaptive physical therapy pillow. The self-adaptive physical therapy pillow comprises a pillow body, a micro motor, a latex layer, transmission shafts and an electric shock heating switch, wherein a supporting cushion layer is mounted at the middle end of the pillow body in a nested mode, and a containing groove is formed in the inner side of the middle end of the pillow body and connected with the supporting cushion layer; and a micro motor is mounted at the lower end of the pillow body in a nested mode, and a movable part is mounted at the output end of the micro motor in a nested mode. According to the self-adaptive physical therapy pillow with the pressure relieving function for the neurology department and the pressure relieving method of the self-adaptive physical therapy pillow, as the head of a user leans against the outer end of the supporting cushion layer, the pressed supporting cushion layer moves downwards to apply pressure to a contacted bonding air bag, and then air is supplied to a corrugated pipe at the tail end through an air conveying through pipe, so that two sets of sponge pieces making contact with the corrugated pipe are pushed to get close inwards, then patients with different head types are softly attached and wrapped, the ears of the patients are semi-closed, and the situation that the patients hear outside noise in the cultivating process is avoided.

The invention provides a mechanical supercharger structure with a decompression function, applied to the technical field of engine superchargers. According to the mechanical supercharger structure, an input shaft gear (10) on an input shaft (2) is meshed with a driving shaft gear (15) on a driving shaft (19); the driving gear (16) coaxial connected with the driving shaft gear (15) is simultaneously meshed with a driven gear (1) on a driven shaft (20); the input shaft (2) is provided with an axial decompression hole (5); one end of the axial decompression hole (5) is communicated with a lubricating oil cavity (23), and the other end of the axial decompression hole (5) is communicated with the outside; and the axial decompression hole (5) is provided with a decompression valve (1) capable of regulating the pressure inside the lubricating oil cavity (23). By the mechanical supercharger structure with the decompression function disclosed by the invention, the pressure inside the lubricating oil cavity of a mechanical supercharger can always be kept within a reasonable scope; and the supercharger structure has the characteristics of being stable and reliable in decompression, and good in oil-gas separation effect.

The invention relates to a shale gas pressure-maintaining coring depressurization analysis metering device and a shale gas content measuring method.The device comprises a gas leading-out pipeline, a gas flow metering part and a control and display part, an inlet of the gas leading-out pipeline can be communicated with a pressure-maintaining coring inner cylinder, and a pressure sensor and a pressure regulating part are connected to the gas leading-out pipeline in series; the gas flow metering part comprises a first metering branch and a second metering branch which are arranged in parallel, a wide-range gas flowmeter is arranged on the first metering branch, and a small-range gas flowmeter is arranged on the second metering branch; and the pressure sensor, the wide-range gas flowmeter and the small-range gas flowmeter are electrically connected with the control and display part. The shale gas pressure-maintaining coring depressurization analysis metering device can be directly connected with a pressure-maintaining coring inner cylinder, the gas content can be tested without opening the cylinder body, the lost gas amount does not need to be calculated, and the measurement result is accurate.

The invention discloses an unidirectional water top and pressure relief device, and particularly relates to a check pressure relief valve arranged inside a body. A top cover is arranged outside the body, an arc convex surface and an arc concave surface corresponding to each other are arranged between the top cover and the check pressure relief valve, the bottom surface of the body is provided witha plurality of outflow holes, the top surface of the top cover is provided with a plurality of inflow holes, and the positions, corresponding to the plurality of inflow holes in the top cover, of theperipheral circumference of the check pressure relief valve are provided with unidirectional check portions. The check pressure relief valve is used at the waste water discharge of a water dispenserto keep dirty water from flowing back; and in addition to the unidirectional check effect, when the water flow pressure is greater than a set value, the check pressure relief valve further is characterized by having a pressure relief function.

The invention relates to a sealed crucible with a pressure relief function and a preparation method thereof. The sealed crucible comprises a pot body and a pot cover, an air channel used for pressure relief is formed in the pot cover, the pot cover is provided with a pressure relief part capable of deforming under pressure, and when the pot cover is in an initial state, the air channel is sealed on the pot cover by the pressure relief part; and when the pot cover is pressed, the pressure relief part deforms to open the air channel for pressure relief. According to the sealed crucible with the pressure relief function, the air channel sealed by the pressure relief part is formed in the crucible cover, when the crucible is used for testing, after the pressure in the crucible is increased, the pressure relief part is deformed, then the air channel is promoted to be opened for pressure relief, the thermal runaway process can be better simulated, and the repeatability of a test result is improved; by adopting the crucible disclosed by the invention, a new thermal analysis method can be expanded, and the influence of pressure on the thermal performance of a substance can be investigated.

The invention relates to the technical field of water processing, and discloses a hydrogen-rich water preparation device and method. The hydrogen-rich water preparation device comprises a water tank,a first tank body, a second tank body, a water pump, a water outlet, a plurality of switch valves and a plurality of pipelines; the water outlet end C of the water tank is respectively connected withthe water inlet ends H of the first tank body and the second tank body; the water inlet end of the water tank is connected with the water outlet ends of the first tank body and the second tank body, the water pump is arranged on a pipeline at the water outlet end c of the water tank, and the water outlet is formed in a pipeline at the water outlet end f of the first tank body; the first tank bodyis further connected to a hydrogen supply device, and the plurality of switch valves are arranged on the pipelines in a one-to-one correspondence mode. The hydrogen-rich water generating device can quickly generate hydrogen-rich water with supersaturated concentration, has a pressure relief function, and avoids the phenomenon that a large amount of hydrogen is lost due to pressure relief during water taking.

The invention relates to a pressure relief joint and a liquid cooling component using the same in order to guarantee the leakproofness of the liquid cooling component in normal work. The pressure relief joint comprises a joint seat which is hermetically installed on a cooling liquid chamber body; the joint seat is provided with a pressure relief passage which communicates with the inside of the cooling liquid chamber body; the pressure relief joint further comprises a pressure relief valve core which is movably installed inside the joint seat in a guiding manner; the pressure relief valve corecomprises a sealing position and a pressure relief position, wherein the sealing position is positioned in a movement stroke and is used for sealing the pressure relief passage; the pressure relief position is used for opening the pressure relief passage; the pressure relief joint further comprises a locking part which is used for matched with the pressure relief valve core in a stop manner in order to keep the pressure relief valve core at the sealing position; the locking part is detachably installed or movably installed on the joint seat; and the locking part which is movably installed onthe joint seat comprises an avoiding position which is separated from the pressure relief valve core in a stop manner. By additionally arranging the locking part, the pressure relief joint has the pressure relief function without affecting the normal use of the liquid cooling component, and does not cause leakage of cooling liquid.

The invention discloses a fireproof coating for an ultra-long steel shell tunnel structure. The fireproof coating comprises, by weight, 30-60 parts of reinforced glue A, 80-150 parts of an adhesive, 4-6 parts of a rheological agent, 5-20 parts of a cosolvent, 5-20 parts of modified expanded vermiculite, 0-3 parts of cellulose, 3-5 parts of a reinforcing agent and 200-300 parts of a solvent, wherein the reinforced glue A comprises, by weight, 5-10 parts of polyvinyl alcohol, 50-100 parts of ammonia water and 5-20 parts of a modifier. Reasonable material compatibility is adopted, so the fireproof coating is ensured to have various use performances under the normal condition, the toughness and the ductility of the fireproof coating are enhanced, and a material basis of a non-flammable foam carbonization layer having a three-dimensional space structure is formed under the action of the flame burning or the high temperature so as to provide the framework effect for the foam carbonization layer and meet the requirement of an RABT temperature increasing manner.

The light-weight large-scale anti-explosion container with the pressure relief function comprises an anti-explosion container body, a cover plate, a base and an exhaust pipe, an upper end plate is fixedly arranged at the top of the anti-explosion container body, the cover plate is connected to the top of the upper end plate, the base is fixedly arranged at the bottom of the anti-explosion container body, the base is of a hollow structure, and the exhaust pipe is connected with the cover plate. And the exhaust pipe is fixedly arranged at the upper end of the right side of the anti-explosion container. According to the light-weight large-scale anti-explosion container with the pressure relief function, the cover plate can be automatically controlled to be opened and closed conveniently, the sealing performance is high, anti-explosion and leakage-proof effects are achieved, the strength is high, objects are safely stored, the mass is light, the container can be stably placed and supported on the ground conveniently, shaking and toppling are avoided, pressure relief and exhaust can be automatically controlled, and precision and practicability are high.

The invention provides a large-flux hydraulic two-step pressure regulation distributor, comprising a low pressure loop, a high pressure loop, a hydraulic system interface, and an oil tank interface; the low pressure loop and the high pressure loop are respectively connected with the hydraulic system interface and the oil tank interface; the lower pressure loop comprises a first insertion valve (1) and a second insertion valve (6), a first electromagnetic conversion valve (7), a second electromagnetic conversion valve (5.1), and a third electromagnetic conversion valve (5.2) and a pressure reducing valve (4); the second electromagnetic conversion valves (5.1) and the third electromagnetic conversion valve (5.2) are respectively connected with the first insertion valve (1) and the pressure reducing valve (4); the first electromagnetic conversion valve (7) is connected with the second insertion valve (6); the high pressure loop comprises a third insertion valve (9.1), a fourth insertion valve (9.2), a fourth electromagnetic conversion valve (8.1) and a fifth electromagnetic conversion valve (8.2); the fourth electromagnetic conversion valve (8.1) and the fifth electromagnetic conversion valve (8.2) are respectively connected with the third insertion valve (9.1) and the fourth insertion valve (9.2); the hydraulic system interface is provided with an oil filter (3). The invention has two-step high pressure and low pressure regulation function and pressure releasing function, which can implement the smooth shift between a high pressure and a low pressure.

The invention discloses an L-CNG (Liquid-Compressed Natural Gas) skid-mounted device without energy consumption. The L-CNG skid-mounted device is characterized in that: a low-temperature heat-insulation storage tank V001 is communicated with a low-temperature high-pressure spherical storage tank V002 and a low-temperature high-pressure spherical storage tank V003 through pipelines; an LNG (LiquidNatural Gas) high-pressure booster V004 is correspondingly arranged on the low-temperature high-pressure spherical storage tank V002; an LNG high-pressure booster V005 is correspondingly arranged on the low-temperature high-pressure spherical storage tank V003; output ends of the low-temperature high-pressure spherical storage tank V002 and the low-temperature high-pressure spherical storage tankV003 are connected with an LNG high-pressure air temperature type gasifying device V006 through pipelines; and the LNG high-pressure air temperature type gasifying device V006 is respectively connected with a CNG (Compressed Natural Gas) low-pressure gas storage bottle group or a gas storage well V007, a CNG middle-pressure gas storage bottle group or a gas storage well V008, and a CNG high-pressure gas storage bottle group or a gas storage well V009. The L-CNG skid-mounted device can convert the liquid natural gas into the compressed natural gas without using a high-voltage pump. The production cost is greatly reduced for an owner of a gas station, so as to save energy sources for a country.

The invention discloses a variable displacement oil pump with a pressure relief groove. An oil pump oil outlet cavity and an oil pump oil absorption cavity are arranged on a pump body and a pump cover, an adjusting ring is arranged in the pump body, a protrusion is arranged on the outer circumference of the adjusting ring, the radial outer end face of the protrusion is in sealed connection with an inner cavity, the protrusion is provided with a first side and a second side along the circumference, the first side is towards a pressure control cavity communicated with the oil pump oil outlet cavity, the second side is connected with an adjusting mechanism, the protrusion is provided with a third side and a fourth side in the radial direction, the third side is in sealed connection with the pump body, the fourth side is in sealed connection with the pump cover, the pump cover is further provided with the pressure relief groove, one end of the pressure relief groove is communicated with the oil pump oil absorption cavity, and the other end of the pressure relief groove is arranged at the position of the fourth side corresponding to the pump cover. The characteristic that the change of the adjusting ring of the variable displacement oil pump is changed along with oil pressure changes is utilized to control whether the pressure relief groove is communicated with the pressure control cavity, and a pressure relief function of an ordinary oil pump pressure relief groove is achieved.

The invention discloses a dynamic spinning melt mixer which comprises a fixing shaft and a mixing sleeve. The mixing shaft is rotatably arranged in the mixing sleeve, at least one mixing section for melt mixing is correspondingly arranged on the mixing shaft and the mixing sleeve, spiral convex edges for melt conveying are arranged on the portions on two sides of the mixing section, of the mixing shaft, the spiral convex edges located at the front section of the mixing section in the advancing direction of a melt material are input spiral convex edges, the spiral convex edges located at the rear section of the mixing section are output spiral convex edges, and communicating notches are formed in the input spiral convex edges and enable the material conveying spaces on two sides of the input spiral convex edges to be communicated. The dynamic spinning melt mixer is simple in structure and easy to achieve. In addition, the dynamic spinning melt mixer has a pressure relief function, accordingly and well controls the temperature rise of a belt in the mixing process, meanwhile plays a mixing assisting function and improves the mixing effect.