305 results about "Fluid leakage" patented technology

The utility model provides a quick-connection ball valve which comprises two ball valves, the two ball valves are in linear clamping connection, each ball valve is provided with a through hole for fluid to pass through, each ball valve comprises a valve body, a valve element is arranged in each valve body, each valve element is connected with a valve rod, the end, away from the corresponding valve element, of each valve rod extends out of the corresponding valve body, and the end, extending out of the corresponding valve body, of each valve rod is connected with a handle. The handle drives the valve element to rotate through the valve rod. And the valve body is provided with a locking device. The locking device comprises a locking groove and a locking column; the handle is in driving connection with the locking column. When the handle is closed, the locking column is arranged in the valve body; when the two ball valves are in butt joint and the handle is opened, the handle drives the locking column to stretch into the locking groove of the other ball valve, the locking device locks the two ball valves, the two ball valves are prevented from rotating and disengaging, fluid leakage caused by looseness is avoided, and the safety of valve body connection is improved.

A nuclear main pump double-cone sealing leakage detection method based on a bolt load and a sealing contact model relates to the technical field of double-cone sealing leakage detection.The method comprises the steps that firstly, the bolt load is substituted into a mapping model of the bolt load and gasket sealing surface contact pressure, and the sealing surface contact pressure is obtained; dividing calculation units for the sealing contact surface, and completing the construction of a gasket sealing rough contact surface model of a single calculation unit; a finite element simulation method is used for obtaining a sealing contact surface entity after compression deformation; the deformed sealing contact surface entity is subjected to micro fluid leakage calculation in Fluent fluid simulation software, and the leakage rate of a single calculation unit is obtained; finally, the leakage rate of the whole double-cone sealing structure is obtained according to division of the calculation units. By acquiring the king bolt load and the sealing contact model, tiny leakage detection of the double-cone sealing structure is achieved, and the method has the advantages of being high in accuracy, simple in test, high in environmental adaptability and the like.

A sealing mechanism for a rotating mechanism, a rotating mechanism and a sealing method. The rotating mechanism comprises a rotor having a rotary disk (1) and a stator accommodating the rotor. The sealing mechanism comprises a first flow-blocking portion (4), which protrudes and is provided on an end face of the rotary disk (1), wherein a labyrinth seal and a spiral seal are provided in combination at the first flow-blocking portion (4); and a first corresponding flow-blocking portion (5), which is recessed, is provided on an inner surface of the stator and is in clearance fit with the first flow-blocking portion (4). The first flow-blocking portion (4) has a first recessed portion and / or protruding portion (6) on a circumferential surface thereof, the first corresponding flow-blocking portion (5) is flatly constructed or provided, on a circumferential surface thereof, with a first corresponding protruding portion and / or recessed portion (7) which are / is in clearance fit with the first recessed portion and / or protruding portion (6), and the first flow-blocking portion (4) and the first corresponding flow-blocking portion (5) form a labyrinth seal at the corresponding top or bottom section thereof respectively and form a spiral seal at a corresponding side section respectively, which can further suppress fluid leakage, thereby improving the sealing performance.

Described herein are examples of pressure sensors, and methods to assemble pressure sensors. In some examples, a pressure sensor uses gauges attached to a sensor tube of a sensor body to detect a pressure of fluid flowing within the sensor tube. In some examples, the sensor tube helps to isolate the gauges from some of the stresses that the rest of the sensor body may experience due to intense fluid pressures. In some examples, the sensor body has a one piece design that increases durability. In some examples, a sensor adapter may be attached to the sensor body and / or hardened by one or more techniques to reduce the chance of fluid leakage and / or further increase durability. The gauges, the sensor body, and / or the sensor adapter can be enclosed within a sensor cover, and encased within a potting material, to protect and / or insulate the components.

The present disclosure relates to a tearable sheath assembly, the tearable sheath assembly comprising: an introducer comprising an introducer body, a locking cap, and an introducer sheath, the introducer having a longitudinal axis and an internal cavity, the introducer body and the introducer sheath being provided with a weak portion in a direction of the longitudinal axis; and a hemostasis valve including a weakness, the hemostasis valve configured to prevent leakage of liquid to an exterior of the tearable sheath assembly. The present disclosure also relates to a hemostasis valve.

The application discloses a tube sheet sealing structure and relates to the technical field of heat exchanger sealing, aiming to solve the problem of fluid leakage caused by insufficient sealing performance of the current sealing structure. The tube sheet sealing structure comprises two flanges, a tube sheet, two first welding rings and a sealing component. The two flanges are oppositely arranged and form a clamping space through a connecting piece. The two first welding rings are coaxially and sealingly connected to the opposite end faces of the two flanges, respectively. The first welding ring is coaxially sleeved on the outer periphery of the tube sheet. The inner ring surface of the first welding ring is spaced apart along the circumferential direction and the axial direction of the tube sheet and is provided with a plurality of protrusions extending along the radial direction of the tube sheet. The inner ring surface of the first welding ring is matched with the outer peripheral surface of the tube sheet through the protrusions. The sealing component is sealingly connected with the first welding ring and the tube sheet. The sealing component, the first welding ring and the tube sheet enclose a sealing cavity. The sealing cavity is communicated with the gap between the first welding ring and the tube sheet, and is used for preventing fluid leakage.

The invention provides a separation nut unlocking process simulation analysis method based on explosion impact fluid-solid coupling, and the method comprises the steps: building a separation nut model which comprises a plurality of accessory structures; performing grid division on the separation nut model; setting the attribute of each accessory structure in the separation nut model and the relationship between the accessory structures; setting constraint conditions, boundary conditions, reaction duration and reaction step length of the separation nut model during reaction; and performing simulation analysis on the separation nut model to obtain a simulation result. According to the scheme provided by the invention, the fluid-solid coupling calculation stability breakthrough is realized, the calculation result interruption caused by the fluid leakage problem, the structural large deformation failure and the negative volume of the traditional ALE algorithm is solved by optimizing the fluid-solid coupling parameter combination, and the accuracy and the stability of the separation nut separation and unlocking process simulation are greatly improved.

The utility model provides a floating centering test fixture. The floating centering test fixture comprises a base, a cover plate, a sliding block and two elastic pieces, the base comprises a bottom wall and a peripheral wall arranged around the outer edge of the bottom wall, the bottom wall and the peripheral wall jointly define a containing space, the end, away from the bottom wall, of the base is combined to the cover plate, and the cover plate is provided with a first through hole. The sliding block is located in the containing space and can slide in the radial direction, a first connecting hole is formed in the center of the sliding block, a first connecting structure is arranged in the first connecting hole and used for being connected with a tested connector, and the first connecting hole corresponds to the first through hole of the cover plate. Elastic pieces are arranged on the two opposite surfaces of the sliding block along the axis of the sliding block respectively and make contact with the cover plate and the bottom wall of the base respectively. The elastic pieces not only provide floating support and buffer positioning for the sliding block, but also can achieve a sealing effect and effectively prevent fluid leakage when the first connecting hole of the sliding block is a through hole, so that the accuracy and reliability of the testing process are improved.

The invention discloses an abdominal belt capable of monitoring errhysis and seepage, and belongs to the technical field of medical instruments. A bellyband capable of monitoring errhysis and seepage comprises a bellyband body and hanging buckle structures connected to the two ends of the bellyband body, an elastic band is arranged in the bellyband body, the bellyband body is provided with a display screen, and the bellyband further comprises a seepage collecting assembly arranged on the inner wall of the bellyband body; the detection assembly is arranged on one side of the collection assembly, the detection assembly is used for detecting the seepage in time, the detection assembly is electrically connected with the display screen, and the display screen is used for displaying seepage components; cleanness of the exudate collecting box and the sponge block is guaranteed, and the risk of cross infection caused by exudation or exudate deposition is further avoided; according to seepage detection, the type of seepage is determined and displayed through a display screen, so that medical staff can conveniently master the seepage condition in time, a surgical incision is treated, and seepage generation is controlled in time. The pipeline is prevented from being blocked through dredging, and it is guaranteed that seepage smoothly enters the pipeline for subsequent detection.

The invention discloses an experimental device for simulating pipeline leakage. The experimental device is characterized by comprising a pipeline main body, a flange plate, an air pipe connecting device, a cable passing device, a valve device and a control module, the pipeline main body consists of a plurality of sections of steel pipelines which are connected and fixed through flange plates, and the flange plates are sealed through sealing gaskets; the air pipe connecting device and the cable passing device are installed and fixed through a flange plate steel plate at the front end. The valve device is installed and fixed through a rear end flange plate steel plate. The control module comprises an air pump and a valve, the valve injects water into the pipeline, and the air pump pressurizes the interior of the pipeline; the pipeline main body is filled with water through the valve in advance, the air pump applies pressure to the pipeline main body through the air pipe connecting device to simulate the internal pressure of the water supply pipeline, the real pipeline fluid leakage condition is simulated by controlling opening and closing of the valve, and the device is simple in structure, convenient to use and high in fitting degree with the actual condition.

The utility model provides a pulse solenoid valve which comprises a water inlet pipeline, a water outlet pipeline and a coil assembly which are arranged on a valve body, a water inlet cavity communicated with the water inlet pipeline and a water outlet cavity communicated with the water outlet pipeline are arranged in the valve body, and a water retaining disc for separating the water inlet cavity and the water outlet cavity is arranged above the water inlet cavity. The water inlet cavity is communicated with a water retaining cavity located above the water retaining disc through a water inlet hole in the water retaining disc, the coil assembly controls connection or disconnection between the water retaining cavity and the pressure relief cavity through the valve element so as to control the up-down pressure difference of the water retaining disc, and the pressure relief cavity is communicated with the water outlet cavity. The pressure relief chamber is arranged in the pressure relief body, and the pressure relief body is integrally connected with the valve body; the pressure relief body and the valve body are integrally connected, a sealing structure at the joint of the pressure relief body and the valve body is omitted, the problem of fluid leakage at the joint is solved, and the pressure relief valve is easy to assemble, high in structural reliability and high in stability.

The utility model discloses a fluid seal sealer, which belongs to the technical field of sealers and comprises a sealing connecting pipe, two connecting ring blocks are fixedly arranged in the sealing connecting pipe, the section of each connecting ring block is L-shaped, and a sealing washer is fixedly arranged on one side of each connecting ring block. The connecting ring block, the sealing washer, the threaded ring block and the metal corrugated pipe are arranged in the sealing connecting pipe, efficient and reliable sealing connection is achieved, the L-shaped section design of the connecting ring block is combined with the sealing washer, the sealing performance of the threaded connection position of the threaded ring block is guaranteed, fluid leakage is effectively prevented, and the sealing effect is good. Meanwhile, mounting and dismounting are more convenient and faster through the threaded connection mode, the maintenance efficiency is improved, the sealer is good in elasticity and flexibility due to the arrangement of the metal corrugated pipe, the sealer can adapt to pipeline deformation and vibration under different fluid working conditions, and then damage and leakage caused by working condition changes are effectively prevented.

The utility model relates to the technical field of cosmetics, and discloses a pressing bottle, which comprises a bottle body, a bottle cover, a bottle cap and a pressing part, the bottle cap covers the bottle opening of the bottle body in a sealing manner, and the bottle cap is detachably connected with the bottle body; the pressing pump body is hermetically connected into the bottle cap, and an external thread is arranged at the part, above the bottle cap, of the pressing pump body; the liquid outlet nozzle communicates with the upper end of the pressing pump body, and the liquid outlet nozzle is configured to be capable of reciprocating in the axial direction of the pressing pump body; the infusion tube is arranged in the bottle body, and the infusion tube is communicated with the lower end of the pressing pump body; the limiting sleeve is arranged above the bottle cap, internal threads are arranged on the inner wall of the limiting sleeve, and the limiting sleeve is in threaded connection with the outer wall of the pressing pump body; when the adjusting limiting sleeve abuts against the liquid outlet nozzle, the liquid outlet nozzle is prevented from moving. The liquid outlet nozzle can be adjusted and locked, the liquid leakage phenomenon in the transportation process is avoided, and use is kept convenient.

A pipe clamping device for preventing fluid leakage from a pipe is provided. The pipe clamping device includes a first jacket member (12) and a second jacket member (14) connected by a hinge (16). The first jacket member (12) and the second jacket member (14) are adapted to be mounted on a surface of a pipe (24) to define a sealed cavity (40) between the first jacket member (12), the second jacket member (14) and the surface of the pipe when the pipe clamping device is in a fully closed position. A clamping assembly is operable to hold the first jacket member (12) and the second jacket member (14) in sealing engagement with the pipe (24), thereby sealing the sealed cavity (40) and preventing fluid ingress between the jacket members and the pipe. The first and second jacket members (12, 14) each include interengaging sealing surfaces adapted to provide a fluid seal between the first and second jacket members (12, 14), at least one of the interengaging sealing surfaces having a first resilient sealing means (72a) secured thereto, and the first and second jacket members (12, 14) each include a pipe sealing surface (22) adapted to provide a fluid seal between the pipe (24) and the first and second jacket members (12, 14), each cylindrical sealing surface having a second resilient sealing means (72b) secured thereto. Each of the first jacket member (12) and the second jacket member (14) includes a partially cylindrical friction surface (23) that is separated from the pipe sealing surface (22) and adapted to provide friction against axial and / or rotational movement of the pipe clamping device relative to the pipe (24). Each of the partially cylindrical friction surfaces (23) has a resilient friction means (68) secured thereto. A second pipe clamping device is also provided for application to a pipe to isolate the pipe by freezing a fluid carried within the pipe. The second pipe clamping device has a set of parts similar to those of the first pipe clamping device.

The utility model discloses a high-pressure regulating valve with excellent sealing performance, which belongs to the technical field of high-pressure air supply regulation and comprises a valve body, a sealing component, a valve cage, a valve component, a filler component, a sealing heat dissipation component and an execution component are mounted on the valve body, and the valve component for controlling fluid circulation is mounted at the lower end of the execution component. The sealing assembly, the valve cage, the valve assembly, the packing assembly and the sealing heat dissipation assembly are located on the inner side of the valve body. The valve cage comprises a valve cage bottom piece, a plurality of valve cage middle pieces, a valve cage upper cover and a valve cage gland. By means of the mode, through the arrangement of the valve cage middle piece, fluid scouring and cavitation erosion are relieved, and the service life of equipment is prolonged; through the arrangement of the inclined surface of the self-sealing ring and the elastic strain groove, the sealing effect of the self-sealing ring can be improved when the stuffing box receives pressure, and leakage of fluid is avoided; through the arrangement of the filler box, the filler gasket, the filler and the filler pressing sleeve, the heat transfer efficiency is improved, and the heat dissipation effect is improved through the cooperation of the cooling fins.

The invention provides an expansion leaking stoppage device and a technological method. The expansion leaking stoppage device comprises a lifting nipple, the lower end of the lifting nipple is connected with a hanging load sensor through threads, the upper end of the lifting nipple is connected with a transition connector, and a drill rod is connected with the hanging load sensor through threads and connected with a connecting rod through a conversion connector. The lower end of the connecting rod is in threaded connection with the upper end of the expansion short section, the lower end of the expansion short section is in threaded connection with the torque short section, and the transition joint, the lifting short section, the drill rod, the conversion joint, the connecting rod, the expansion short section and the torque short section form an inner-layer tubular column; the upper end of the expansion pipe is fixed on the conversion connector through a shear pin, and the lower end of the expansion pipe is connected with the floating valve through floating valve external threads to form an outer-layer pipe column together with the floating valve. The turntable drives the inner-layer tubular column and the outer-layer tubular column to rotate into a well; the expansion pipe is tightly attached to the well wall of the open hole by pressurizing the expansion pipe nipple, well drilling open hole malignant leakage plugging is achieved, and therefore the problem of drilling fluid leakage is solved.

The utility model provides a postoperative peritoneal drainage auxiliary device which comprises a binding belt, a first installation ring fixedly arranged on the binding belt, the outer wall of the first installation ring fixedly connected with the binding belt, an annular groove formed in the inner wall of the first installation ring, an annular block arranged in the annular groove in a sliding mode, and a second installation ring fixedly arranged on the annular block. A mounting shaft is rotatably arranged on the inner wall of the second mounting ring in the radial direction of the second mounting ring, a fixing ring is fixedly arranged at the end, away from the second mounting ring, of the mounting shaft, the fixing ring is rotatably connected with the second mounting ring in the axial direction of the mounting shaft, a through hole is formed in the fixing ring, and a drainage tube penetrates through the through hole; according to the drainage tube fixing device, the drainage tube can be adaptively fixed, seepage and leakage of the drainage tube caused by body position change of a patient are avoided, and the infection risk of a wound of the patient is reduced.

A fluidic tactile sensor includes a core and an elastic skin mechanically coupled to the core. A cell containing a fluid medium is formed in a space defined between opposing surfaces of the core and the elastic skin. A fluid leakage passage is formed in the core and is in fluid communication with the cell. An orifice member is fixed within the fluid leakage passage. The orifice member includes an orifice that is tuned to restrict fluid flow through the fluid leakage passage and limit a fluid leakage rate of the cell.

The invention relates to the technical field of medical treatment, in particular to a closed thoracic drainage device. The drainage device comprises a supporting shell, a rotating outer ring hinged to the supporting shell, and a drainage liquid containing assembly arranged in the supporting shell and hinged to the rotating outer ring. The invention aims to provide a thoracic cavity closed drainage device which solves the problems that in the moving process and the using process of an existing thoracic cavity drainage device, the situation that liquid leaks easily occurs, the work of medical staff is increased, and the work safety of the medical staff is reduced.

The fluid distribution device comprises a needle tube assembly, a liquid storage container and a piston, and the liquid storage container is arranged below the needle tube assembly and can axially move relative to the needle tube assembly; a fluid product and protective gas located on the upper layer of the fluid product are contained in the liquid storage container. The piston is movably arranged in the liquid storage container and seals the opening of the liquid storage container; wherein the liquid storage container can move towards the needle tube assembly under the actuation of external force, and during the actuation, the needle tube assembly pierces and extrudes the piston, so that the protective gas in the liquid storage container is discharged outwards through the distribution hole before the fluid product. According to the fluid distribution device, the protective gas is filled in the liquid storage container, so that the protective gas is discharged outwards before the fluid product at the moment when the drainage tube punctures the piston, fluid leakage at the moment of puncturing is avoided, and the accuracy of the distributed dosage of the fluid product is ensured.

The utility model relates to the technical field of pipeline connection, in particular to a pipe joint convenient for mounting a refractometer, which comprises a joint body, and a joint inner groove is arranged on the upper end face of the joint body to ensure that a sensor can be stably mounted in the joint so as to perform accurate measurement or monitoring work. The left side and the right side of the connector body are arranged to be planar installation end faces, two guide cavities are formed in the bottom of the connector inner groove in a bilateral symmetry mode, and an installation opening is formed in the middle of the bottom face of the connector inner groove and used for installing and fixing the refractometer. When the connector is used, the planar mounting end face is arranged at the side end of the connector body, and the pipe connecting groove is formed in the connector position of the pipe connector, so that the connector body is in butt joint with a pipeline to form a sealed folding opening, the butt joint sealing performance of the pipeline and the connector body is greatly improved, and the fluid leakage condition is prevented.

The present disclosure relates to diagnosing and locating fluid leakage within a pneumatic system (5) using a minimal amount of pressure sensors (55, 75, 89). In general, each branch (51, 71, 85) of a pneumatic system (5) includes an associated pressure sensor (55, 75, 89) and in accordance with how the pneumatic components (57, 59, 61, 77, 91, 93, 95) associated with the pneumatic branch (51, 71, 85) are toggled and monitored, leaks can be detected and located within the branch (51, 71, 85) using a minimal amount of pressure sensors (55, 75, 89). More specifically, pressure and pressure decay may be measured by the sensors (55, 75, 89) within a branch (51, 71, 85) while the pneumatic components (57, 59, 61, 77, 91, 93, 95) are in a particular configuration. The configuration is thereafter changed, and pressure and pressure decay are again measured by the sensors (55, 75, 89). The results of these two measurements may enable the pneumatic system (5) to derive the presence and location of a leak.

The utility model relates to the technical field of fluid connectors, and discloses a fluid connector with a sealing structure, which comprises a male head and a female head, and further comprises a sliding pipe arranged in the female head in a sliding manner; the fixed plate is fixed on the outer surface of the female head; one end of the first spring is connected with the interior of the female head, and the other end of the first spring is connected with the sliding pipe; the sealing structure is arranged in the male head; and the air inflation structure is arranged on the male head, the air inflation structure is communicated with the sealing structure, and when the male head is connected with the female head, the air inflation structure inflates the sealing structure. When the sealing device is used, the annular sealing piece is tightly attached to the sliding pipe after being inflated and expanded, the effective sealing effect is provided, the sealing performance of the connecting portion is ensured, the annular sealing piece applies pressure to the sliding pipe, the sealing effect is enhanced, fluid leakage is prevented, and the reliability of a system is improved.

The present disclosure relates to a washable and reusable absorbent undergarment includes an absorbent assembly, including a wearer facing top layer, a moisture barrier layer, and one or more intermediate layers, wherein the absorbent assembly defines a circumferential outer edge and a circumferential margin extending along the circumferential outer edge. The circumferential margin includes one or more sealed margin portions, each sealed margin portion including a fluid seal providing a continuous sealing between the wearer facing top layer and the moisture barrier so as to hinder fluid leakage from an area inside the circumferential margin to the outside of the circumferential outer edge via the sealed margin portion; and the circumferential margin further including one or more unsealed margin portions.

To provide a magnetic refrigerator capable of reducing a risk of leakage of a process fluid and preventing heat input from a driving device to the process fluid.SOLUTION: The magnetic working apparatus is provided with a heat insulating tank 20, a working container 21 fixed in the heat insulating tank 20 and having an inflow port and an outflow port of a process fluid and filled with the process fluid inside, a magnetic working material 22 arranged in the heat insulating tank 20 and directly brought into contact with the process fluid to be heated by excitation and to be cooled by demagnetization, a magnetic field generating device 3 arranged in the heat insulating tank 20 to surround the side face of the working container 21 by entering the working container 21, and a magnetic working material moving structure 30 for moving the magnetic working material 2 in the heat insulating tank 20 in a prescribed direction to enter the working container 21 into the magnetic field generating device 3 and to demagnetize the working container 21.SELECTED DRAWING: Figure 2

The invention provides a work exchange type energy recovery device with a leakage rate detection function, which is provided with a special circulation hole, the circulation hole is not communicated with a relative low-pressure fluid inlet and a relative low-pressure fluid outlet of the energy recovery device, and an upper end cover and a lower end cover of the energy recovery device are not provided with leakage liquid guide-out channels. The shell, the upper end cover and the lower end cover form a leaked fluid collecting area, the circulating hole is externally connected with a leaked fluid discharging pipe, and a flow meter is arranged on the leaked fluid discharging pipe; the rotating assembly and the non-rotating assembly of the energy recovery device are provided with guide channels, and leaked liquid between the rotating assembly and the non-rotating assembly is guided into the leaked fluid collecting area or guided to the circulating hole. According to the invention, the fault detection problem that the most important fault high-pressure fluid leakage of the energy recovery device is too large can be solved through a low-cost scheme, and the abnormal condition can be accurately detected in real time.

Described herein are examples of pressure sensors, and methods to assemble pressure sensors. In some examples, a pressure sensor uses gauges attached to a sensor tube of a sensor body to detect a pressure of fluid flowing within the sensor tube. In some examples, the sensor tube helps to isolate the gauges from some of the stresses that the rest of the sensor body may experience due to intense fluid pressures. In some examples, the sensor body has a one piece design that increases durability. In some examples, a sensor adapter may be attached to the sensor body and / or hardened by one or more techniques to reduce the chance of fluid leakage and / or further increase durability. The gauges, the sensor body, and / or the sensor adapter can be enclosed within a sensor cover, and encased within a potting material, to protect and / or insulate the components.

The utility model discloses an automatic bag opening machine for a multi-chamber bag, which relates to the technical field of medical equipment and comprises a rack, a first chamber, a second chamber, a bag opening device, a bag opening device and a bag opening device, and is characterized in that the rack is internally provided with a first chamber with an opening in the front side; the pressing plate is located in the first cavity and slidably connected with the side wall of the first cavity, and the pressing plate can slide in the height direction of the first cavity; the length direction of the pressing plate is arranged along the length direction of the opening of the side wall of the first cavity; and the driving assembly is arranged on the rack and is used for driving the pressing plate to slide. By adopting the scheme, each chamber of the multi-chamber bag can be automatically extruded at the same time through the descending action of the bag pressing mechanism, manual curling is replaced, and medicines are mixed by controlling the pressing height, so that the bag body is prevented from being damaged and liquid leakage is avoided.

Systems, methods, and devices for relieving overpressure associated with thermal expansion of fluid within a closed cavity of a subsea manifold assembly. The subsea manifold assembly may comprise a header bore fluidly connected to one or more branch connections. A unidirectional valve is included at the branch connections to allow fluid leakage from the closed cavity into a header bore of the subsea manifold assembly to thereby reduce a pressure within the cavity while in the closed position.

The utility model discloses a two-way pneumatic valve with a ring groove valve core, which relates to the technical field of two-way pneumatic valves and comprises a valve seat, fixing pipes are arranged at two ends of the valve seat, a servo motor is mounted on the left side of the valve seat, and an output end of the servo motor extends into the valve seat and is provided with a valve rod. A connecting plate is installed on the right side of the valve rod, a valve element is installed on the right side of the connecting plate, a first flange is installed on the right side of the fixing pipe, and a sealing mechanism for reducing fluid leakage is arranged on the right side of the first flange. According to the two-way pneumatic valve with the annular groove valve element, the sealing strip is placed on one side between the first flange and the second flange, and then the sealing strip is extruded by a bolt when the first flange and the second flange are connected, so that a gap between the first flange and the second flange is filled; and therefore, the gap between the first flange and the second flange is reduced, and the situation of fluid leakage is avoided.