979 results about "Shut down valve" patented technology

Systems and methods which provide control of lubricant delivery with respect to chainsaws using a lubricant flow shutoff valve controlled in correspondence to an operational state of the chainsaw. A chainsaw lubricant delivery control system includes a lubricant flow shutoff valve and a chainsaw operation-based valve controller operable cooperatively to provide control of lubricant delivery to the cutting chain and guide bar assembly of a chainsaw. The chainsaw operation-based valve controller is coupled to an operationally active element of the chainsaw wherein the chainsaw operation-based valve controller may control the lubricant flow shutoff valve between an open position and a closed position responsive to detecting a particular state of the operationally active element corresponding to an operational state of the chainsaw.

The invention discloses a nuclear power stop valve capable of reducing friction, and relates to the technical field of stop valves. According to the nuclear power stop valve capable of reducing friction, through the design of a composite mechanism, the valve rod is rotated by the hand wheel to drive the valve clack to ascend, a gap is formed between the valve clack and the ring-shaped groove in the surface of the baffle so that liquid can flow conveniently, on the contrary, the valve clack and the ring-shaped groove are in butt joint, the effect of stopping fluid is achieved, and then the fluid flow can be controlled so that the working requirement can be met; the valve clack is in friction fit with the friction mechanism in the lifting process, so that the effect of cleaning components is achieved, impurities on the surfaces of the components are reduced, corrosion caused by too many impurities or the situation that the sealing effect is affected by too many impurities is prevented, protection mechanisms are arranged on the two sides of the valve body shell, and the protection mechanisms are placed on the inner sides of the pipelines on the two sides, so that friction force to the pipelines is enhanced; the sealing effect is improved, aging leakage of the two sides of equipment is prevented, friction of liquid to parts is reduced, equipment abrasion is reduced, and therefore the service life of the equipment is prolonged.

The invention discloses an improved valve body flow channel of a stop valve with a low lift loss coefficient xi and meeting ESG requirements. The valve body flow channel comprises a valve chamber, an annular groove, an inlet flow channel, a valve inlet, a valve seat, an outlet flow channel and a valve outlet. Wherein the center line of the inlet is provided with a bent arc smooth streamline, the angle of the rotating angle A is 2theta 1, and 2theta is larger than or equal to 55 degrees and smaller than or equal to 105 degrees; the bottom of the annular groove is provided with an inclined surface with an inclined angle beta; an outlet center line S2 of the outlet flow channel is a smooth streamline obliquely downwards, an inner outlet is formed in the inner diameter of the valve chamber, the angle of a corner E of an upper edge line S2a of the outlet flow channel is 2theta 21, 30 degrees < = 2theta 21 < = 90 degrees, a near end point E4 is communicated with the bottom of the inclined plane, and the height LH5 / d0 < = 0.4 of the near end point E4 is 0.4 < = LH5 / d0 < = 0.4; the jet flow S121 and the slow flow S122 can enter the outlet flow channel after passing through the diffusion C to form a rotation angle D, flow division is generated, and no flow interference is generated in the valve chamber and the inner outlet.

The utility model discloses a high-pressure inflation pipeline structure wound on an IV-type hydrogen storage cylinder inner container, which comprises a nitrogen cylinder, the output end of the nitrogen cylinder is sequentially connected with a high-pressure reducing valve, a one-way valve, a low-pressure reducing valve, a pressure release valve, a pressure gauge and a stop valve through a high-pressure connecting pipe, and the stop valve is connected with the IV-type hydrogen storage cylinder inner container. The high-pressure inflation pipeline is provided with the high-pressure reducing valve, the one-way valve, the low-pressure reducing valve, the pressure release valve, the pressure gauge and the stop valve, so that the functions of monitoring, adjusting and pressure release of the internal pressure during winding of the IV-type hydrogen storage cylinder liner can be realized, and the problem that the IV-type hydrogen storage cylinder liner is expanded and broken due to overlarge pressure or insufficient support due to oversmall pressure during winding and inflation is avoided; and the normal use and the use safety of the IV-type hydrogen storage bottle liner winding are ensured.

Systems and methods are provided for automatically actuating preexisting water shut-off valves. A coupling of a valve actuator is connected to a handle of the valve, such that a motor of the valve actuator causes the selective opening and closing of the water shut-off valve. A controller monitors and controls valve actuation by controlling the motor. In addition to actuating the water shut-off valve upon detection of leak conditions, the controller may actuate the valve in order to test the water supply system or to test operation of the water shut-off valve. The operating status of the water shut-off valve may thus be monitored in order to detect or address problems with the water shut-off valve to prevent unexpected valve failure after a leak is detected.

The invention relates to the technical field of valve leakage alarm, in particular to a stop valve with an automatic alarm function, which comprises a stop valve arranged in a valve well and alarm mechanisms respectively arranged at the edges of flange interfaces at the two ends of the stop valve, the detection base is composed of a base plate and an extension plate which are integrally and fixedly connected, inner cavities of the base plate and the extension plate are communicated, a detection module is arranged on the detection base and comprises a plurality of detection rods located at the edge position of the outer circle face of the base plate, and a microphone is arranged in each detection rod. Collected leakage noise is amplified through a plurality of microphones distributed in an array mode, amplified signals are received through a noise sensor, an alarm is triggered, vibration signals are received through an acceleration sensor, and then the alarm is triggered. A monitoring platform of a natural gas pipeline network system judges whether leakage occurs or not through the two variables of the sound signal and the vibration signal, and the accuracy of leakage detection of the alarm mechanism is improved.

The invention discloses a hydraulic speed regulation control system of a feed pump turbine valve, which comprises a regulating valve control unit, and the regulating valve control unit comprises a regulating valve hydraulic control block and a regulating valve hydraulic servo-motor. A servo valve, a filter, a hydraulic control one-way valve, a differential pressure type plug-in loading and unloading valve, an upper plug-in stop valve, a lower plug-in stop valve, a quick-closing electromagnetic valve, a first pressure oil channel, a first oil discharge channel and a safety oil channel are fixed in the adjusting valve hydraulic control block. The safety oil duct is connected with the first pressure oil duct and the differential pressure type plug-in loading and unloading valve. The quick-closing electromagnetic valve is connected in parallel between the safe oil duct and the oil discharge channel I; an oil inlet of the servo valve is communicated with the filter, a control oil port is connected with the differential pressure type plug-in loading valve through the hydraulic control one-way valve, and the differential pressure type plug-in loading valve is connected with the lower plug-in stop valve; and the regulating valve hydraulic servo-motor is respectively connected with the upper cartridge stop valve and the lower cartridge stop valve. According to the system, the servo valve and the filter element can be replaced on line, and the technical problem that the servo valve and the filter element cannot be replaced on line in an existing regulating valve speed regulating system is solved.

The utility model relates to the technical field of valves, and discloses a stop valve which comprises a valve body, a valve rod, a supporting ring, a packing set, a pressing sleeve and a pressing plate. The supporting ring abuts against the first limiting step, the bottom of the filler set is supported on the supporting ring, the pressing connection section is connected to the upper portion of the filler set in a pressing mode, the guide section is sleeved with the pressing plate, during installation, the fastener penetrates through the first installation hole, the pressing plate is locked and connected to the connecting boss part, in the locking process, the pressing plate downwards extrudes the pressing sleeve, and the pressing sleeve downwards extrudes the filler set; in the locking process, the guide section guides the pressing plate to stably and horizontally descend, the guide section is supported on the inner side of the pressing plate, the pressing plate is prevented from inclining, the situation that when one or some first fasteners are locked firstly, the pressing plate inclines towards the side where the first fasteners are located, and consequently pressure application is uneven is avoided, and it is guaranteed that the pressing plate stably descends in the horizontal posture; and therefore, the pressing sleeve is ensured to uniformly apply pressure to the packing group so as to uniformly compress the packing group, and the sealing performance can be effectively ensured.

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 stop check valve. The stop check valve comprises a valve body, a valve clack and a locking mechanism. A fluid passage is defined in the valve body. The valve clack is arranged in the fluid channel, and the valve clack has a rotatable state and a non-rotatable state. The locking mechanism is arranged in the fluid channel, has a locking position and a releasing position, and is arranged to be capable of locking the valve clack to keep the valve clack in a non-rotating state when the locking mechanism is in the locking position; when the locking mechanism is located at the releasing position, the valve clack can be released to be in a rotatable state. According to the stop check valve, the valve clack and the locking mechanism which rotate around the common axis are arranged, so that the stop check valve can achieve the functions of a stop valve and a swing check valve at the same time.

The invention belongs to the field of stop valves, particularly relates to an ultralow-temperature stop valve with a non-return function, and provides the following scheme aiming at the problems that when an existing valve is closed, the non-return effect cannot be achieved, during liquid return of the valve, monitoring cannot be carried out, the type and flow of backflow liquid cannot be rapidly known, and the overhauling difficulty of a device is improved. The valve comprises a valve body, a cover plate is fixedly connected to the top of the valve body through bolts, a water inlet and a water outlet are formed in the two ends of the valve body respectively, a connecting hole is formed in the valve body and used for connecting the water inlet and the water outlet, and a control assembly used for controlling opening and closing of the valve is arranged at the top of the cover plate. After the valve is closed, the electromagnet is closed, a plurality of arc-shaped blocks are inserted among a plurality of strip-shaped plates, liquid backflow is avoided, when the weight is gradually increased, the buzzer alarm starts to give an alarm to remind a worker that the backflow liquid flows into the sampling barrel through the L-shaped hole, and the sampling process is completed.

A leak test device (44) is designed to test leaks between a first conduit (38) and a second conduit (40), which may be part of a heat exchange system. The apparatus (44) includes a first channel (48) and a second channel (50), a flow control system (46), and flow sensors (F1.1, F1.2, F2.1, F2.2) located at respective locations within each respective channel (48, 50). Each passage (48, 50) is connected to a conduit (38, 40) to form a respective closed-loop system, and a flow control system (46) is adapted to actively maintain fluid pressure at a set level within each closed-loop system. In a set pressure closed loop system, any detected flow is indicative of a leak. The use of a plurality of flow sensors (F1.1, F1.2, F2.1, F2.2) at different locations allows the possible leakage locations to be distinguished. The shut-off valve may provide a mechanism by which the test device can control a test sequence to be performed on the conduit (38, 40). The apparatus may be used online to test various designs of the heat exchanger, and may be amplified to test complex systems.

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.

The utility model relates to the technical field of valves, in particular to a stop valve with a standby valve seat, which comprises a valve casing, an upper valve seat is mounted close to the upper portion in the valve casing, a lower valve seat capable of moving up and down is arranged below the upper valve seat, an upper valve core is arranged above the upper valve seat in the valve casing, and a lower valve core is arranged above the lower valve seat. The upper valve element and the lower valve element are connected through a connecting rod, and a second threaded rod is rotationally connected to the center of the top of the upper valve element. By arranging the lower valve seat capable of moving up and down, when the upper valve seat breaks down, the lower valve seat extends to the highest position, the valve can be sealed through cooperation between the lower valve seat and the lower valve element, double guarantees are provided for the valve, the two valve seats can be used at the same time, and the closure effect of the valve can be effectively 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.

An air-operated pump, such as an air-operated diaphragm pump, includes a pump body, a process liquid pathway defined at least in part by the pump body, and an air pathway defined at least in part by the pump body, where the process liquid pathway and air pathway are fluidly separated from one another within the pump body. The pump further includes a leak detection and containment assembly integrated with the pump body and having a process liquid sensor configured to sense process liquid leaked from the process liquid pathway into the air pathway, and a shutoff valve communicatively coupled to the process liquid sensor and configured to close in response to the process liquid sensor sensing a process liquid leak to contain the leaked process liquid within the pump body and the assembly.

The utility model discloses a frost valve with a temperature control device, which comprises a valve body, a temperature sensing stop valve is arranged at the top of the valve body, a drainage component is arranged at the bottom of the valve body, screws are arranged at four corners of the top of the valve body, a mounting seat is arranged in the temperature sensing stop valve, a diaphragm body is arranged at the top of the mounting seat, and a temperature control device is arranged on the diaphragm body. A first valve rod is arranged in the temperature sensing stop valve, a first spring is arranged in the first valve rod, the surface of the first valve rod is sleeved with a first memory alloy spring, and the bottom of the first valve rod is fixedly connected with a sealing gasket. According to the anti-freezing valve, the phenomenon that opening and closing of the valve body cannot be controlled according to the temperature of water flow in the prior art is changed, meanwhile, the phenomenon that electric heating or combustion heating fails without electricity in the prior art is avoided, and the first valve rod, the first memory alloy spring and the first spring are adopted for opening and closing; opening and closing of the valve body can be controlled according to the temperature of water flow, and the service life of the anti-freezing valve is not limited.

An air conditioning system (100) is provided with: a heat source machine (10); a first indoor unit (20a); a first shutoff unit (30a) having a first shutoff valve (34); an alarm device (50a); an alarm unit (40a); a first refrigerant sensor (23) provided in the first indoor unit (20a); and an indoor refrigerant sensor (43) provided in the alarm unit (40a). The heat source machine (10) and the first indoor unit (20a) are connected by a first piping (121). The alarm device (50a) issues an alarm when a refrigerant leak is detected by the first refrigerant sensor (23), and the alarm unit (40a) issues an alarm when a refrigerant leak is detected by the indoor refrigerant sensor (43). The first shutoff unit (30a) closes the first piping with a first shutoff valve in each of the cases in which a refrigerant leak is detected by the first refrigerant sensor (23) and in which a refrigerant leak is detected by the indoor refrigerant sensor (43).

An ultrahigh pressure stop valve needle structure capable of being adjusted coaxially comprises a steel ball, a sealing ring, a connecting shaft and a needle valve rod, the steel ball, the sealing ring, the connecting shaft and the needle valve rod are installed in an ultrahigh pressure stop valve, an ultrahigh pressure stop valve gas drive cylinder applies gas pressure in the range of about (0-0.5) MPa to drive the valve needle structure, and the valve needle structure and a valve seat are sealed through an extrusion deformation metal wire on a contact face. Reliable cut-off of ultrahigh pressure not smaller than 500 MPa is achieved. The connecting shaft and the needle valve rod are connected in an H6 / n5 interference fit mode. A steel ball with the hardness not smaller than 80 HRC and the diameter phi 2 is adopted for automatic aligning, and the contact area between the steel ball and a pneumatic piston of the stop valve is reduced, so that radial friction force is reduced, and coaxial adjustment of the part is achieved. Two O-shaped sealing rings with the diameter phi are assembled at the radial position of the connecting shaft, radial assembly of the assembly and a pneumatic piston in the stop valve is achieved, and the coaxiality adjusting margin is obtained by means of the compressible characteristic of the O-shaped sealing rings.

An air conditioning device (100) comprises an outdoor unit (10), a first indoor unit (20b1), a first blocking unit (30b), and control devices (11, 21, 31). The first indoor unit (20b1) includes a first temperature sensor (23) that detects the temperature of refrigerant. The first blocking unit (30b) is provided with a first shutoff valve. In a normal mode, the control devices perform control so as to open the first shutoff valve. In a test mode, the control devices are configured to change the opening degree of the first shutoff valve at a first time point and determine, on the basis of a change in temperature detected by the first temperature sensor (23) before and after the first time point, whether the first blocking unit (30b) is correctly connected to the first indoor unit (20b1).

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 dust collection adapter (10) according to the present disclosure includes: a main body (11, 12); an internal flow path (19) that is located in an interior of the main body (11, 12) and through which a gas flows; and a plurality of ribs (17, 18) that are located in the internal flow path (19) and with which the gas introduced into the internal flow path (19) collides. The dust collection adapter (10) is mounted on an adapter-receiving component located at an inlet of a gas meter. The adapter-receiving component may be, for example, a shut-off valve (20).

The utility model provides a corrugated pipe stop check valve, which relates to the technical field of stop valves and comprises a valve main body, a water inlet is arranged on one side of the valve main body, a water outlet is arranged on one side of the valve main body far away from the water inlet, a valve rod is arranged at the top of the valve main body, and a corrugated pipe is arranged at the bottom of the valve rod. A rotating wheel is arranged at the top of the valve rod, a sealing device is arranged at the bottom of the corrugated pipe, a connecting device is arranged at the top of the corrugated pipe, the sealing device comprises an arc-shaped plate, the arc-shaped plate is fixedly connected with the inner wall of the valve body, and a rubber block is fixedly connected to the bottom of the corrugated pipe. The rubber block is extruded to one side of the arc-shaped plate, then the rubber block is extruded through the connecting strip, the water inlet and the water outlet are separated through the rubber block, a good sealing effect is achieved, and abrasion of the rubber block can be reduced to a certain degree.

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.

To provide a gas flow measurement device capable of further improving the accuracy of gas flow measurement, and a gas flow measurement system.SOLUTION: A gas flow measurement device 2 includes: a storage unit 21 that stores reference correlation values (e.g., zero reference value), which is a value corresponding to a predetermined flow rate for a correlation value having a correlation with the flow rate of gas in a flow path 13; and a control unit 20. The control unit 20 is configured such that, when the preset condition that estimates that there is no gas usage downstream of the own device is met (S3: YES), the flow path is closed by a shutoff valve 4 for a predetermined first period, and during first period, the average value of the gas flow rate is calculated by the flow rate calculation process for a predetermined second period, and execute a series of correction processing (S4-S7) to correct the reference correlation value stored in the storage unit based on the average value.SELECTED DRAWING: Figure 1

The present application relates to the technical field of online detection, and in particular to an online gas leak detection method, system, equipment and medium. The present application first closes the stop valve at the gas meter to isolate the pipe section to be tested from the external pipe network, and then starts the drive device to pressurize the pipeline. After that, it is determined whether there is a leak by analyzing the pressure change, avoiding the inconvenience caused by the introduction of air. In addition, the full-automatic detection is realized through the cooperation of the pressure sensor and the processor. After the detection is completed, the user can use the gas equipment immediately, and the leakage hidden danger can be discovered in time, which significantly improves the detection efficiency and user experience.

The invention discloses a stop valve based on sealing performance self-inspection, and relates to the technical field of stop valves. Comprising a valve body, a valve cover, a valve clack assembly, a valve rod, a hand wheel, a protection assembly and a support, displacement generated when a lower valve clack is closed is utilized, a sealing detection groove is automatically opened, leakage liquid is guided and collected, a detection ring is driven by the leakage liquid to move upwards, accordingly, a detection block is driven to extrude a transmission block, a piezoelectric crystal is finally triggered, leakage physical quantity is converted into quantifiable electric signals, and the leakage physical quantity is detected. And the purpose of sealing self-inspection is achieved. When the valve clack assembly is opened, the design that the lower valve clack rebounds automatically is utilized, the liquid drainage ring is driven to be embedded into the sealing measuring groove, leakage liquid in the sealing measuring groove is squeezed out, and the liquid drainage effect is achieved. The lower valve clack and the upper valve clack are made to be close to each other through downward pressure generated when the valve clack assembly is closed, the air bag ring is extruded, the air bag ring generates one-way expansion to conduct secondary sealing on the closure opening, and the multiple sealing effect on the closure opening is achieved in combination with primary sealing between the upper valve clack and the closure opening and between the lower valve clack and the closure opening.

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.