32results about How to "Guaranteed pressure safety" patented technology

The invention provides an automotive LNG gas supply system. The automotive LNG gas supply system comprises a gas bottle assembly, a safety valve, a safety pressure relieving pipeline and an engine gassupply pipeline; the safety pressure relieving pipeline and the engine gas supply pipeline are connected to the gas bottle assembly, the safety valve is arranged on the safety pressure relieving pipeline, and the safety pressure relieving pipeline and the engine gas supply pipeline are independent and are not connected. Compared with a traditional automotive LNG gas supply system, the novel automotive LNG gas supply system removes arrangement of an economic valve and an economic valve connecting pipeline, direct supply through liquid LNG fuel is achieved, on the premise of ensuring the original safety of the whole gas supply system, the price and the failure rate of the automotive LNG gas supply system are greatly reduced, the superior economy is provided for a user, the system belongs tothe element omission invention, and the market popularization prospect is wide.

The invention discloses a railway vehicle carbon dioxide air conditioner safety valve and an air conditioner system. The safety valve comprises a valve body, a locking assembly and a first pressure relief assembly, wherein a first channel is formed in the valve body, an air inlet connector and a first outlet are formed in the side face of the first channel, the first pressure relief assembly comprises a first valve element and a first pressure relief spring, the two ends of the first pressure relief spring abut against the valve body and a first valve element, the locking assembly is arrangedin the valve body and comprises a locking block and an electromagnet, the electromagnet is fixedly connected with the valve body, the locking block can be attracted by the electromagnet to move, a fixing protrusion is arranged on the locking block, the fixing protrusion can limit the first valve element, so that the first valve element blocks communication between the air inlet connector and the first outlet, and when the electromagnet is powered on, the electromagnet attracts the locking block, so that the fixing protrusion cancels limiting of the first valve element. According to the safetyvalve and the air conditioner system, the traditional passive pressure relief function is reserved, the safety valve can be actively opened according to the CO2 concentration, and refrigerant CO2 leakage is prevented.

The invention discloses an air quantity determining method of meeting cooling requirements of an extra-high voltage direct-current thawing device. The method comprises the following steps: preliminarily selecting the number of power devices which are connected with each rectifier bridge arm in series in a rated operation; calculating ideal no-load direct current voltage; calculating input side voltage; calculating voltage storage coefficients of the power devices; adjusting the number of the power devices according to the voltage storage coefficients; carrying out voltage-sharing designs of the power devices; calculating conduction losses of the power devices; calculating damping loop losses of the power devices; calculating total losses of each rectifier bridge arm in rated current; and calculating the total losses of the extra-high voltage direct-current thawing device to obtain a calorific value of the device. The method disclosed by the invention is specific and high in practicability; the number of the power devices is optimally selected under the premise of ensuring the pressure-resistant safety by calculating the voltage storage coefficients of the power devices; the cost increase and the calorific value increase caused by excessive selection are avoided; the calorific value of the device is obtained by quantitatively calculating the total losses of the devices; a design of a heat-removal system is guided; the air quantity determining method is comprehensive to consider and accurate to calculate; and an over design is avoided.

Multi-section shell copper tube waterway single partition refrigeration heat exchanger, including shell, front end cover, front partition, partition, rear end cover, rear partition and copper tube; the shell is a cylindrical cast iron shell, described in multiple sections The casings are connected end to end in series and sealed; the casing of each section is used as the casing of an evaporator of a refrigeration system; the casing of each section is provided with a refrigerant inlet, a refrigerant outlet, an exhaust port and an oil discharge port The bottom shell of the front end cover is 8-shaped; the two ends of the spacer plate are respectively welded to the ends of the two shells; the rear end cover is welded by the cylindrical shell of the outer ring and the spherical bottom cover; The rear partition is provided with a ring groove; the present invention shares the waterways of the evaporators of multiple refrigeration systems, reduces space occupation, and ensures stable operation at any time according to actual operating conditions.

The invention discloses a cold water evaporator with multi sections of shells and a copper pipe sharing a single partition plate. The cold water evaporator comprises the shells, a front end cover, a front separation plate, the partition plate, a rear end cover, a rear separation plate and the copper pipe; the shells are cylindrical cast iron shells, and the plurality of sections of shells are connected end to end in series and are sealed; each section of the shell serves as a shell of an evaporator of a refrigerating system; the shell of each section is provided with a refrigerant inlet, a refrigerant outlet, an exhaust port and an oil discharge port; bolt holes are formed in the edges of the bottom shell and the tube shell of the front end cover; the two ends of the partition plate are welded to the ends of the two sections of shells respectively; a water cavity is formed between the rear end cover and the rear separation plate; and the copper pipe is arranged inside the shell. According to the cold water evaporator, water channels of evaporators of multiple refrigeration systems are shared, so that the space occupation is reduced, and the operation under a stable working condition can be guaranteed at any time according to the actual operation condition.

The invention discloses a cold water heat exchanger with a plurality of sections of shells, a copper pipe, a waterway and double partition plates. The heat exchanger comprises shells, a front end cover, a front separation plate, the partition plates, a rear end cover, a rear separation plate and the copper pipe, wherein the shells are cylindrical cast iron shells, and the plurality of sections ofshells are connected end to end in series and are sealed; the shell of each section serves as an outer shell of an evaporator of a refrigerating system; the shell of each section is provided with a refrigerant inlet, a refrigerant outlet, an exhaust port and an oil discharge port, wherein the bottom shell of the front end cover is of an Arabic number 8 shape, and each partition plate is composed of two flange plates which are welded to the shells on the left side and the right side correspondingly; a water cavity is formed between the rear end cover and the rear separation plate; and an annular groove is formed in the rear separation plate. According to the heat exchanger, water channels of the evaporators of a plurality of refrigeration systems are used in common, so that the space occupation is reduced; and the operation in a stable working condition can be guaranteed at any time according to the actual operation condition.

The invention discloses a multi-section shell type single partition plate cold water evaporator. The cold water evaporator comprises a shell, a front end cover, a front separation plate, partition plates, a rear end cover, a rear separation plate and a copper pipe, wherein the shell is a cylindrical cast iron shell; a plurality of sections of the shells are connected in an end-to-end mode in series and are sealed together; and the shell of each section serves as the shell of the evaporator of a refrigerating system; and the shell of each section is provided with a refrigerant inlet, a refrigerant outlet, an exhaust port and an oil discharge port; a bottom shell of the front end cover is a 8 shape; and the two ends of the partition plates are welded to the ends of the two sections of the shells correspondingly; and a water cavity is formed between the rear end cover and the rear partition plate; and the copper pipe is arranged in the shell. According to the invention, water channels ofthe evaporator of the refrigerating system are shared, so that space occupation is reduced; and the operation under a stable working condition can be guaranteed at any time according to the actual operation condition.

A multi-shell copper pipe waterway single-spacing-plate water-cooled evaporator comprises shells, a front end cover, a front partition plate, a spacing plate, a rear end cover, a rear partition plateand a copper pipe; the shells are cylindrical cast iron shells, the multiple sections of shells are connected end to end in series and sealed; each shell serves as a shell of an evaporator of a refrigeration system and is provided with a refrigerant inlet, a refrigerant outlet, a gas outlet and an oil outlet; a bottom shell of the front end cover is in the shape like the Arabic number eight; the two ends of the spacing plate are welded to the ends of two sections of shells correspondingly; a water cavity is formed between the rear end cover and the rear partition plate; and the copper pipe isarranged in the shells. According to the multi-shell copper pipe waterway single-spacing-plate water-cooled evaporator, the evaporators of the multiple refrigeration systems share the same waterway, the occupied space is decreased, and the effect that operation is conducted under the stable working condition is ensured according to the actual operation working condition at any time.

The invention discloses a multi-section shell copper pipe water way single-spacing-plate refrigeration evaporator. The multi-section shell copper pipe water way single-spacing-plate refrigeration evaporator comprises shells, a front end cover, a front separation plate, a spacing plate, a back end cover, a back separation plate and copper pipes; the shells are cylindrical cast iron shells; multiplesections of the shells are serially connected end to end and sealed; each section of the shell serves as a shell of an evaporator of a refrigeration system; each section of the shell serves as a shell of an evaporator of a refrigeration system; each section of the shell is provided with a refrigerant inlet, a refrigerant outlet, an exhaust port and an oil discharge port; a bottom shell of the front end cover is 8-shaped; the two ends of the spacing plate are respectively welded at the end parts of two sections of the shells; the back end cover is welded by a cylindrical shell on the outer ring and a spherical bottom cover; and the copper pipes are in the shells. Water ways of evaporators of multiple refrigeration systems are shared to reduce occupied space; and operation under stable working conditions is guaranteed according to actual operation working conditions at any time.

Multi-section shell copper tubes share a double-baffle refrigeration heat exchanger, including shell, front cover, front partition, partition, rear end cover, rear partition and copper tubes; the shell is a cylindrical cast iron shell, described in multiple sections The casings are connected end to end in series and sealed; the casing of each section is used as the casing of an evaporator of a refrigeration system; the casing of each section is provided with a refrigerant inlet, a refrigerant outlet, an exhaust port and an oil discharge port There are bolt holes on the bottom shell of the front end cover and the edge of the tube shell; the spacer plate is two flanges, which are welded with the shells on the left and right sides respectively; the rear end cover is composed of a cylindrical shell of the outer ring and a spherical The bottom cover is welded; the rear partition is provided with a ring groove; the present invention shares the waterways of the evaporators of multiple refrigeration systems, reduces space occupation, and ensures stable operation at any time according to actual operating conditions.

The invention discloses a multi-section pipe-shell type single partition plate cold water evaporator. The cold water evaporator comprises a shell, a front end cover, a front separation plate, partition plates, a rear end cover, a rear separation plate and a copper pipe, wherein the shell is a cylindrical cast iron shell, a plurality of sections of the shells are connected in an end-to-end mode inseries and are sealed together; and the shell of each section serves as the shell of the evaporator of a refrigerating system; the shell of each section is provided with a refrigerant inlet, a refrigerant outlet, an exhaust port and an oil discharge port; bolt holes are formed in the edges of a bottom shell and a pipe shell of the front end cover; two ends of the partition plates are correspondingly welded to the ends of the two sections of the shells; and a water cavity is formed between the rear end cover and the rear partition plate; and the copper pipe is arranged in the shell. According to the multi-section pipe-shell type single partition plate cold water evaporator, water channels of the evaporators of the refrigerating systems are shared, so that space occupation is reduced; and the operation under a stable working condition can be guaranteed at any time according to the actual operation condition.

The invention discloses a multi-section shell shell-tube double-spacing-plate cold water heat exchanger. The multi-section shell shell-tube double-spacing-plate cold water heat exchanger comprises shells, a front end cover, a front separation plate, spacing plates, a back end cover, a back separation plate and copper pipes; the shells are cylindrical cast iron shells; multiple sections of the shells are serially connected end to end and sealed; each section of the shell serves as a shell of an evaporator of a refrigeration system; each section of the shell is provided with a refrigerant inlet,a refrigerant outlet, an exhaust port and an oil discharge port; bolt holes are formed in the edges of a bottom shell of the front end cover and a tube shell; the spacing plates are two flange plates, and are respectively welded with the shells on the left and right sides; a water cavity is formed between the back end cover and the back separation plate; and the back separation plate is providedwith a ring groove. Water ways of evaporators of multiple refrigeration systems are shared, so that occupied space is reduced; and operation under stable working conditions is guaranteed according toactual operation working conditions at any time.

A refrigeration evaporator with multiple sections of outer shells and double separation plates comprises the outer shells, a front end cover, a front separation plate, the separation plates, a rear end cover, a rear separation plate and a copper pipe, wherein the outer shells are cylindrical cast iron outer shells, and the multiple sections of the outer shells are in series connection end to end and sealed; each section of the outer shell serves as an outer shell of an evaporator of a refrigerating system; each section of the outer shell is provided with a refrigerant inlet, a refrigerant outlet, an exhaust port and an oil discharge outlet; a bottom shell of the front end cover is in a shape like an Arabic number eight; the separation plates are two flange plates and are welded to the outer shells on the left and on the right respectively; the rear end cover is formed by welding a cylindrical shell of an outer ring and a spherical surface bottom cover; and the copper pipe is in the outer shells. Water channels of evaporators of multiple refrigerating systems are shared, so space occupation is reduced, and operation under stable working conditions is guaranteed according to actual operation conditions at any time.

The invention discloses a multi-section shell and copper pipe shared single-spacing-board refrigeration evaporator. The multi-section shell and copper pipe shared single-spacing-board refrigeration evaporator comprises shells, a front end cover, a front partition plate, a spacing board, a rear end cover, a rear partition plate and copper pipes. The shells are cylindrical cast iron shells, and themultiple sections of the shells are connected end to end to be connected together in series and be sealed. Each section of the shell serves as an evaporator shell of a refrigeration system and is further provided with a refrigerating fluid inlet, a refrigerating fluid outlet, an air exhaust outlet and an oil drain outlet. A bottom shell of the front end cover and the tube-shell edge are provided with bolt holes. The two ends of the spacing board are welded to the ends of the two sections of the shells separately. The rear end cover is formed by welding a cylindrical shell of an outer ring andspherical bottom cover. The copper pipes are arranged inside the corresponding shells. According to the multi-section shell and copper pipe shared single-spacing-board refrigeration evaporator, waterroutes of the evaporators of the multiple refrigeration systems are shared, space occupancy is reduced, and the effect that the multi-section shell and copper pipe shared single-spacing-board refrigeration evaporator operates under the stable working condition can be guaranteed at any moment according to the actual operation conditions.

The invention provides electrohydraulic control method and device for axial flow propeller turbine runner tests. The control device comprises a flow pump, a pressure testing pump, an oil circuit and an oil pressure controlling mechanism, wherein the flow pump and the pressure testing pump are connected with a to-be-tested axial flow propeller turbine runner via the oil circuit; the oil pressure controlling mechanism comprises an electrohydraulic reversing component; the electrohydraulic reversing component comprises an electrohydraulic reversing valve for control, an electrohydraulic reversing valve for business and an energy accumulator; the electrohydraulic reversing valve for control and the electrohydraulic reversing valve for business are connected to increase the driving force of the oil circuit; the oil circuit from the electrohydraulic reversing valve for business to a turbine runner comprises a positive swing oil circuit and a negative swing oil circuit; an output end of the electrohydraulic reversing valve for business is provided with a positive swing switch group and a negative swing switch group which have mutually-exclusive trigger states; and both the positive swing switch group and the negative swing switch group have two operating modes of hydraulic trigger and manual trigger. By means of the method and the device which are provided by the invention, the axial flow propeller turbine runner can be safely and conveniently tested.