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.

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 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 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 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 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 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 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 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.