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

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.

An electric balloon pressure pump, which relates to a medical instrument. The electric balloon pressure pump comprises: a motor (3), a push rod (5) provided with an external thread; a push rod sleeve (7); and a control device, provided with an internal thread. One end of the push rod is fixedly mounted to the motor, and the other end of the push rod is a free end and extends into the push rod sleeve. The control device provided with an internal thread is fixedly mounted on the push rod sleeve. The push rod and the control device provided with an internal thread form a spirally connected fit. The motor drives the push rod, so that the push rod can go forwards and backwards in the push rod sleeve along the axial direction of the push rod sleeve. According to the pump, during the pressurization, the pressurization is implemented by means of the motor, thereby bringing labor saving and high efficiency. During the pressure relief, the rotatable fit of the push rod is removed by means of a pressure relief device, thereby allowing the push rod to directly move back. By controlling the running of the motor, linear pressurization, secondary curve pressurization and segmental pressurization can be performed, and data can be stored, shared and rechecked.

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 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.