608 results about "Shut down valve" patented technology

A toilet seat arrangement includes a toilet seat that is installed above a toilet bowl. A bidet nozzle is installed on the toilet seat and ejects water into a space above the toilet bowl such that the water falls into the toilet bowl. A water level sensor is installed on the toilet seat and detects a level of water in the toilet bowl. The water level sensor transmits a signal indicative of the level of water in the toilet bowl. A shutoff valve allows water to flow to a toilet tank fill valve when the shutoff valve is in an open position, and prevents water from flowing to the toilet tank fill valve when the shutoff valve is in a closed position. An electronic processor controls whether the shutoff valve is in the open position or the closed position dependent upon the signal from the water level sensor.

The invention relates to the technical field of air conditioning systems, in particular to a method for air conditioner refrigerant replacement, and aims to solve the problem of how to replace combustible refrigerants under the condition that a pipeline is not disassembled in an existing non-combustible refrigerant air conditioning system. In order to achieve the purpose, the method comprises the following steps that S11, the amount of refrigerants needed by a to-be-replaced air conditioning system is detected; s12, the quantity of refrigerants capable of being recycled is judged according to the outdoor unit; s13, whether the refrigerant can be directly recycled or not is judged according to the relation between the refrigerant recycling amount and the required refrigerant amount; if yes, entering the step S14; and S14, the refrigerant of the air conditioning system is directly replaced. In the process of replacing the refrigerant or after the refrigerant is replaced, if leakage occurs in the indoor unit, the refrigerant can be prevented from leaking through recycling of the outdoor unit, closing of the block valve or closing of the newly-added valve box or the stop valve, the combustible refrigerant can be prevented from continuously leaking, and it is guaranteed that safety accidents such as fire disasters or explosions cannot occur.

The utility model discloses a leak detection type stop valve, which belongs to the technical field of valves and comprises a valve body, a valve cover is detachably mounted at the top of the valve body, a valve rod is rotatably mounted in the valve cover, and a valve core is fixedly mounted at the bottom end of the valve rod; a vertically-separated separation section is arranged in the valve body, and a valve port is formed in the separation section in a penetrating mode. A leakage detection valve sleeve is assembled at the bottom of the valve body in a sealed mode through threads, a leakage detection valve pipe is sleeved with the leakage detection valve sleeve, a sealing cover is fixed to the top of the leakage detection valve pipe, a plurality of flowing grooves are formed in the side wall of the top end of the leakage detection valve pipe, and a leakage detection opening is formed in the bottom end of the leakage detection valve pipe. A sliding seat is fixed on the side wall of the bottom section of the leak detection valve tube, the sliding seat is slidably mounted on a guide shaft fixed in the leak detection valve sleeve, and a spring for pushing the sliding seat to move downwards is mounted on the guide shaft in a sleeving manner. According to the leak detection type stop valve, the leak detection valve sleeve, the leak detection valve pipe and other assemblies are arranged, the sealing performance of the valve element in the closed state can be overhauled, the whole valve does not need to be disassembled, and the leak detection type stop valve is more convenient to overhaul.

The invention discloses a low-temperature safety valve leakage detection device based on electrical capacitance tomography, which comprises a liquid nitrogen storage container, a test container, a low-temperature stop valve, a detected low-temperature safety valve, a constant-temperature water bath device, a flow meter, a water tank, a leakage detection pipeline, a capacitance measurement system and a data acquisition and software system, the capacitance measuring system comprises a plurality of groups of copper electrode plates and a processing module, each group of copper electrode plates comprises two copper electrode plates arranged on two opposite side parts of the water tank, and the copper electrode plates are used for capturing bubbles formed by the low-temperature gas in the cavity and acquiring capacitance signals; and the copper electrode plate is electrically connected with the data acquisition and software system through the lead electrode plate connector and the shielding coaxial cable. Insulation supports are arranged between the water tank and the copper electrode plates, the interior of the water tank is divided into a plurality of cavities, and communication gaps are formed between the adjacent cavities. The invention further discloses a low-temperature safety valve leakage detection method based on electrical capacitance tomography. According to the method, the accuracy and comprehensiveness of calculating the leakage rate of the low-temperature gas are improved.

A controller is configured to control an internal combustion engine mounted on a vehicle. The controller includes processing circuitry. The processing circuitry outputs a valve closing signal to a shut-off valve, and executes, when a stopping operation of the internal combustion engine is performed, a determination process of determining whether the shut-off valve is stuck open based on a decrease amount of a passage fuel pressure. The controller does not execute the determination process when at least one of a condition that a vehicle speed is higher than a first determination speed and a condition that an engine rotation speed is higher than or equal to a second determination speed is met.

A system includes a variable displacement pump (VDP) in fluid communication with an inlet line and with an outlet line. The VDP includes a variable displacement mechanism configured to vary pressure to the outlet line. A bypass valve (BPV) includes a BPV inlet in fluid communication with the outlet line, and a BPV outlet in fluid communication with a bypass line that feeds into the inlet line upstream of the VDP. A minimum pressure shutoff valve (MPSOV) is connected in fluid communication with the outlet line, configured to block flow through the outlet line for shutoff. The MPSOV is connected in fluid communication with the BPV for triggering recirculation through the BPV.

A trailer control valve for controlling a hydraulic dual-line brake system of a trailer vehicle has an inlet for a hydraulic supply line of the towing vehicle, a tank outlet for an unpressurized return-flow line of the towing vehicle, a brake pressure outlet, and a supplemental pressure outlet. The brake pressure outlet can be connected in a stepped manner with an electronically controlled brake control valve to the supply pressure inlet or to the tank outlet. The supplemental pressure outlet can connect using a valve arrangement so that an outlet pressure of the supply pressure is reduced to a supplemental pressure at the supply pressure inlet or at the tank outlet. The valve arrangement has a pressure-limiting valve and a shut-off valve arranged in series. The shut-off valve can be a 3 / 2-way valve, which when not energized, the supplemental pressure outlet is connected to the tank outlet.

The invention discloses a stop valve with a leakage warning structure. The stop valve comprises a valve shell, a stop structure and a sensing assembly. A water inlet, a water outlet and a stop hole connecting the water inlet and the water outlet are formed in the bottom of the valve shell, the stop structure comprises a valve rod and a valve plug, and the valve plug is sealed with the stop hole through a sealing ring. The sensing assembly comprises a soaking sensing mechanism and a soaking display mechanism. The inner wall of the stop hole is provided with a stop surface and an overflow surface; the valve plug is provided with a first separating ring, a second separating ring and an induction groove, the separating rings are provided with overflow grooves, and the induction groove corresponds to the overflow face. The immersion sensing mechanism comprises a plurality of sensing pieces in a sensing groove, the odd-digit sensing pieces and the even-digit sensing pieces are connected with two electrodes of the display mechanism respectively, and a third overflow groove is formed in the outer ring. The immersion display mechanism detects the conduction condition between the induction sheets through the operation controller, and controls the switch tube to drive the display end to work. Leakage at the sealing position of the valve plug can be detected in time and warned, and safety is improved.

In the technical field of gas water heaters, we provide a double-tank type thermostatic bubble water device. The solution includes a thermostatic tank 1 and a gas dissolution tank 2, the tops of which are connected by an upper connecting pipe 3, the upper connecting pipe is equipped with a shut-off valve 4, and the bottoms of which are connected by a lower connecting pipe 5. The thermostatic tank replenishes the water flow during gas filling, ensuring that users can use the water normally when gas is being added to bubble water, reducing the waiting time during gas addition and improving bathing comfort.

The invention relates to the technical field of valves, in particular to an integrated double-channel stop valve which comprises a main valve body, a liquid inlet bottom cavity and a liquid outlet top cavity, the liquid inlet bottom cavity and the liquid outlet top cavity are formed in the main valve body, a valve seat ring is arranged between the liquid inlet bottom cavity and the liquid outlet top cavity, a valve element disc is arranged outside the valve seat ring, and the valve element disc moves axially through the valve element disc. The valve element disc and the valve seat ring are matched in an opening and closing mode, and therefore stopping and circulation control of the stop valve are achieved. According to the integrated double-channel stop valve, integrated pressure relief protection can be achieved, fluid pressure relief and discharge can be conducted when the pressure is too high through the additionally-arranged secondary channel, and the integration degree is improved while the safety is improved.

The invention relates to the field of natural gas, in particular to an auxiliary operation method based on an intelligent filling system, and solves the safety and benefit problems of Dewar flask filling. Liquid is guided, after a filling liquid phase valve and a gas phase stop valve are fully opened, a rear gap bridge valve of a filling station is slightly opened, and the opening degree is kept within the range of 5-15 degrees within a circle; supercooling: when the outlet temperature of the BOG gasifier is less than or equal to-20 DEG C or the airflow vibration sound of the rear gap bridge valve disappears, closing the rear gap bridge valve; filling gun heads of the liquid-phase pipeline and the gas-phase pipeline are respectively connected with a liquid-phase angle valve and a gas-phase angle valve of the Dewar flask through the connecting pipe; and releasing the pressure, slowly opening a gun head stop valve of the filling gun head of the gas phase pipeline, confirming that no leakage exists at the joint of the filling gun head, and slowly opening a liquid phase angle valve of the Dewar flask. A traditional mode is optimized and improved, the filling efficiency is improved, the refilling quality is guaranteed, the filling safety is improved, human errors are reduced through a regular process, environmental protection and economic benefits are achieved, and the design and use requirements are met.

This invention provides a fire-fighting water pipeline flow regulation device, comprising an inlet pipe, a shut-off valve for controlling the flow of pressurized water within the pipe, an adjustable filter connected to a flow regulator with a cross-sectional area, and an outlet pipe connected to the other end of the flow regulator. Hose connector end caps are fixedly installed at the ends of the inlet and outlet pipes, and an automatic pressure relief valve with upper and lower chambers is installed at the end of the hose connector end cap. This device addresses the problems of unadjustable flow and pressure, failure to automatically drain residual water leading to accelerated pipe corrosion, and lack of filtration causing blockages. It enables manual adjustment of flow and pressure within the pipe, automatic drainage of residual water, and filtration and anti-blockage of pressurized water within the pipe.

The application relates to the technical field of stop valves, and discloses an ultralow-temperature stop valve, which comprises a valve seat and a valve body, the valve seat is arranged on the valve body, a valve rod for opening and closing the valve seat is arranged in the valve body, a packing part is arranged on the valve body, the packing part is used for plugging a gap between the valve body and the valve rod, a heat preservation sleeve is arranged on the valve body, a baffle is arranged on the valve body, the heat preservation sleeve is located on the side, away from the valve seat, of the baffle, and the heat preservation sleeve is located on the outside of the packing part. The heat preservation sleeve is arranged on the valve body, the heat preservation sleeve is located on the side, away from the valve seat, of the baffle, the baffle limits the movement of the heat preservation sleeve, the heat preservation sleeve can stably preserve the temperature of the packing part, the packing part is not prone to thermal bridge effect, and the condition that the packing part can quickly adsorb cold air is reduced.

A water treatment assembly is provided comprising a filter head (12) configured for connection to a water supply line, the filter head comprising a rotatable shut-off valve (62); a sump assembly (30) releasably connected to the filter head, the sump assembly including a sump cover (32) releasably attached to a sump body (34) and defining an interior chamber (38), and the sump cover having a cover port (74, 76) in fluid communication with a complementary head port (68, 70) in the filter head; and a filter insert (40) releasably enclosed within the interior chamber, the filter insert having a filter media portion (42) and an end cap (46) secured to the media portion, the end cap having at least one port (86) configured for fluid communication with one of the cap ports and one of the head ports.

The utility model discloses a high-stability inner sealing structure of a stop valve. The high-stability inner sealing structure is characterized in that a limiting surface and a sealing surface which is connected with a valve rod, limits the moving stroke of the valve rod and has sealing performance are arranged at the bottom of a reverse sealing thread bushing; the sealing surface is arranged on the back sealing thread bushing, when the stop valve is opened, the sealing angle on the valve rod is matched with the sealing surface, the moving stroke of the valve rod is limited, meanwhile, when the sealing angle on the valve rod makes contact with the sealing surface, the back sealing thread bushing can be extruded, the back sealing thread bushing is made to be extruded outwards, and the stop valve is sealed. The sealing performance and the stability of connection between the back sealing thread bushing and the valve body are improved; through the arrangement of the high-strength sealing ring and the high-strength sealing groove, friction between the lower valve element and the interior of the valve body when the stop valve is opened and closed is avoided, the situation that the sealing performance is affected due to abrasion of the lower valve element caused by long-time friction is avoided, the sealing performance and stability of the stop valve are improved, and therefore the service life of the stop valve is prolonged.

The invention provides an online inspection and maintenance butterfly valve, which relates to the technical field of valves, and comprises a valve body and an inspection and maintenance assembly, the two ends of the valve body are fixedly connected with a front end flange and a rear end flange respectively, the valve body is provided with a maintenance assembly, and the check valve is characterized in that the maintenance assembly comprises a notch, the notch is formed in one end of the top of the valve body, and the two sides of the valve body are fixedly connected with extending convex plates. During maintenance, the main flow channel can be closed and switched to the flow dividing branch pipes to circulate media, the defect that in traditional maintenance, shutdown and flow cutoff are needed is overcome, economic losses caused by production stagnation due to shutdown are fundamentally eliminated, in addition, after limitation of the butt joint supporting plate is removed, parts in the valve body can be maintained, multiple sets of flange bolts do not need to be disassembled one by one, and the maintenance cost is reduced. The maintenance time is shortened, meanwhile, the risk of pipeline sealing failure caused by disassembly and assembly of a connecting bolt of the valve body and the pipeline is avoided, and the sealing performance of the pipeline is guaranteed.

A tank device for temperature pressure relief of a gas storage tank, wherein the tank device comprises at least two tank containers and a delivery line connectable with the tank containers. Each of the at least two tank containers has at one end at least one shut-off valve arranged between the respective tank container and the delivery line, wherein at the other end of the tank container at least one safety valve is arranged. On the tank container a mesh element consisting of electrical lines and other electrical lines is arranged, wherein the electrical lines have a longitudinal axis which differs from the longitudinal axis of the other electrical lines. Here, the electrical lines and the other electrical lines form electrically insulated nodes. Furthermore, the mesh element and the tank container have no electrical contact. The invention also relates to a fuel cell system, a fuel cell operated vehicle and a hydrogen operated vehicle.

A drinking and domestic water system with a transfer point (22) from the public water supply network, a line (2, 4) from which at least one ring main (10; 38, 40) branches off, wherein the ring main (10) branches off from the line (2, 4) via an outlet opening (14) and is led back into the line (2, 4) via an inlet opening (16), wherein a flow resistance element (36) is arranged in the line (2, 4) between the outlet opening (14) and the inlet opening (16), or wherein the ring main (38, 40) is led back into a circulation line (6) via the inlet opening (16). The present invention aims to provide such drinking and domestic water system, which is intended to simplify the shutting off of the ring main for functional tests, cleaning measures or maintenance purposes.

The utility model discloses a zero leakage stop valve relates to stop valve technical field, including stop valve body, the both ends of stop valve body are provided with connecting pipe, the inside of connecting pipe is inserted and connected with the delivery pipe, the inner wall of two connecting pipe is provided with two annular sealing groove in the surrounding mode, and the annular sealing groove is connected with the delivery pipe. Annular sealing grooves are formed in the two connecting pipes, annular sealing rings are arranged in the two annular sealing grooves, each annular sealing ring is matched with the corresponding conveying pipe, the pipe walls of the two connecting pipes are slidably sleeved with sealing covers, and sealing mechanisms are arranged between the two connecting pipes and the sealing covers; and two first arc-shaped grooves are symmetrically formed in the inner walls of the two sealing covers. According to the stop valve, the two connecting pipes are connected to the outer surfaces of the corresponding conveying pipes in a sleeved mode respectively, then the two annular sealing rings can play a dual-sealing role, and therefore the phenomenon of leakage at the two ends of the stop valve body can be prevented.

The utility model relates to the technical field of pipeline joints, and provides a water supply pipeline cut-off joint which is characterized in that a cut-off pipe section is in interference fit with a water supply pipe, and the cut-off pipe section is provided with a plurality of grooves; the stop valve is arranged at the end, away from the water supply pipe, of the intercepting pipe section and used for opening or closing the intercepting pipe section; the multiple sealing gaskets are arranged in the grooves, and after the intercepting pipe section is connected with the water supply pipe, the side walls of the sealing gaskets abut against the water supply pipe. By means of the technical scheme, the problem that in the prior art, water in a water supply pipeline cannot be completely closed, and maintenance work is affected is solved.

Vehicle (3) comprising a vibration absorber (1) which includes a mounting seat (2) for the vibration absorber (1). The mounting seat (2) for the vibration absorber (1) includes a seat body (100) and a shut-off valve (301). The seat body (100) is provided with a first flow passage (120), a second flow passage (130), and a third flow passage (140). The first flow passage (120) is configured to be connected to a working cylinder (210) of the vibration absorber (1), the second flow passage (130) is configured to be connected to an external oil pump, and the third flow passage (140) is configured to be connected to an external oil filling device. The shut-off valve (301) is connected accordingly to the first flow passage (120), the second flow passage (130) and the third flow passage (140).The shut-off valve (301) is configured to control whether the first flow passage (120) is connected to the second flow passage (130) or not, and / or to control whether the first flow passage (120) is connected to the third flow passage (140) or not.

A closed fuel tank system (1) comprising: a fuel tank (10), a reservoir (20), a vapor channel (61H), a purge channel (62H), a shut-off valve (61), a purge valve (62), a tank pressure sensing unit (47), a lid flap actuating unit (41), a lid locking part (50A), a control unit (70), and a pre-fueling actuating unit (42). The lid locking part (50A) is designed to lock and unlock the lid flap (50) covering a fuel tank opening and unlocks the lid flap (50) when the lid flap actuating unit (42) is actuated by a user and the internal pressure of the fuel tank (10) is less than or equal to a predetermined pressure.The pre-fueling actuation unit (42) is designed to open the shut-off valve (61) to reduce the internal pressure of the fuel tank (10) to less than or equal to the specified pressure when it is actuated prior to actuating the lid flap actuation unit (42).

The invention belongs to the related technical field of hydraulic elements, and discloses a pipeline breakage automatic shut-off valve and a hydraulic system.The pipeline breakage automatic shut-off valve comprises a main control valve and a mode switching system, the main control valve comprises a main valve block, a differential pressure sensing valve arranged on the main valve block, a Pitot tube and a stop valve, and the main valve block is provided with an inlet and an outlet; the mode switching system comprises an electromagnetic directional valve and a mode switching valve, and the mode switching valve and the electromagnetic directional valve are connected to the main valve block through a transition valve block; one end of the Pitot tube extends into the inlet, and the other end of the Pitot tube is communicated with a high-pressure cavity of the differential pressure sensing valve; the mode switching system is used for switching the working state of a shut-off valve through a mode switching valve and an electromagnetic directional valve in two control modes of manual control and hydraulic remote control; the main control valve senses the flow change through the Pitot tube and the differential pressure sensing valve so as to control opening and closing of the stop valve, and opening and closing of the shut-off valve are achieved.

The invention provides aircraft duct redundancy cleaning equipment and method, and belongs to the technical field of aircraft assembling.The aircraft duct redundancy cleaning equipment comprises a pneumatic part and a box body, the box body serves as a base body for bearing the pneumatic part, the pneumatic part internally comprises an air inlet, a filter, a stop valve, a pressure reducing valve, a foot valve and an air blowing opening which are connected through a pipeline, and the air inlet is connected with an air source; and the pneumatic part is finally connected with a conduit through a blowing port to realize conduit purging. Impurities, dust, redundant substances and the like in an inner cavity of the guide pipe can be removed through pneumatic purging, and it is guaranteed that the installed guide pipe is clean; the blowing pressure for flushing the catheter can be adjusted, and the purging pressure can be selected as required to complete purging of different catheters with different pressure values.

The stop valve comprises a valve body, a flow adjusting assembly and a first filtering structure, the valve body is provided with an axial valve cavity, and a limiting part is arranged on the cavity wall of the valve cavity in a protruding mode; the flow adjusting assembly abuts against the limiting part. The flow adjusting assembly is detachably connected with the cavity wall of the valve cavity, and a first crimping part is constructed at the end, away from the limiting part in the axial direction, of the flow adjusting assembly. The first filtering structure is provided with a first connecting part, and the first filtering structure is pressed on the first crimping part through the first connecting part. By means of the mode that the flow adjusting assembly is detachably connected with the cavity wall of the valve cavity and the mode that the first filtering structure is assembled on the flow adjusting assembly in a compression joint mode, the flow adjusting assembly does not need to be limited to a high-temperature-resistant material when being made of a manufacturing material, the selection range of the material is widened, and cost reduction is facilitated. And if the flow adjusting assembly has a quality problem, the flow adjusting assembly can be timely disassembled without scrapping the whole stop valve.

The present invention relates to an outflow shut-off valve (14), particularly for a plug-in connection device (1) for guiding coolant through which the outflow shut-off valve has a valve pestle (24) that moves axially in the flow passage (18, 20) of the plug-in connection device (1) and acts in a sealing manner with a valve seat (21), a head seal (29) arranged on a valve head (28) of the valve pestle (24) for fluid-tightly closing the flow passage (18, 20), and a closing spring (16) that acts on the valve pestle (24) on one side and can be fixed in the flow passage (18, 20) on the other side. Specifically proposed to improve assemblability, the valve stem (24) is radially sized and elastically deformable within a structural unit with a head seal (29) arranged on the valve head (28), such that the effective outer diameter during assembly is greater than the diameter of the assembly opening (DI6, DI40) in the undeformed state (DAG29, DAG33) and less than or equal to the diameter of the assembly opening (DI6, DI40) in the deformed state (DAM29, DAM33). The invention also relates to a plug-in connection device (1) having such an outflow shut-off valve (14).

A gas system includes an enclosure, a process gas metering valve, a shutoff valve, and a flow switch. The process gas metering valve arranged within the enclosure to flow a process gas to a process chamber of a semiconductor processing system. The shutoff valve is connected to the process gas metering valve to fluidly separate the process gas metering valve from a process gas source. The flow switch is operably connected to the shutoff valve to cease flow of the process gas to the process chamber of the semiconductor processing system using the shutoff valve according to flow of a gas traversing the flow switch. Semiconductor processing systems, gas control methods, and gas system kits are also described.

The stop valve comprises a valve body, an actuator and a valve rod connected with the actuator, the valve body is provided with an inflow cavity on the left side of the valve rod, the valve body is provided with an outflow cavity on the right side of the valve rod, the length direction of the valve rod extends up and down, and the valve rod is located between the inflow cavity and the outflow cavity. The valve body comprises an upper connecting part and a lower connecting part which are detachably connected, the inflow cavity and the outflow cavity are both located in the lower connecting part, the matching seat is detachably connected with the lower connecting part, a left channel is formed in the portion, located on the left side of the valve rod, in the matching seat, and a right channel is formed in the portion, located on the right side of the valve rod, of the matching seat; the valve rod is provided with a transmission channel communicated with the left channel and the right channel, the left channel is communicated with the inflow cavity, and the right channel is communicated with the outflow cavity. According to the stop valve, the valve rod moves downwards to be in contact with the matching seat, so that the situation that the valve body is abraded due to the fact that the valve rod moves up and down is avoided.

The invention relates to a shut-off valve (1) for a fuel gas tank, comprising a main valve (2) and a control valve (3), wherein the main valve (2) has a valve piston (5) movably mounted in a valve housing (4), which interacts with a valve seat (6) formed in the valve housing (4), and wherein the control valve (3) has a control piston (7) arranged coaxially with the valve piston (5), which is movably movable and interacts with a sealing seat (8) formed in the valve piston (5) for opening and closing a drain restrictor (9) formed in the valve piston (5). According to the invention, the drain restrictor (9) has a diffuser section (10) mediating between an inlet diameter (D1) and a correspondingly larger outlet diameter (D2), which is conical and / or stepped. The invention further relates to a fuel gas tank with a shut-off valve (1) according to the invention.

A refrigeration cycle device of an embodiment includes a shutoff valve that is disposed in a pipe connecting an indoor unit and an outdoor unit to circulate a refrigerant and that is opened and closed by power from an alternating-current power source, a backup power source capable of alternatively supplying power for driving the shutoff valve when a power interruption has occurred in the alternating-current power source, an open and close switch that is disposed in a power supply path from the backup power source to the shutoff valve, a control circuit that controls the shutoff valve and the open and close switch, and a power interruption detection unit that detects a power interruption in the alternating-current power source. When the power interruption has been detected, the control circuit closes the open and close switch to close the shutoff valve, and then opens the open and close switch.