546results about "Fluid pressure sealed joints" patented technology

The invention discloses a petroleum pipe threaded connection air-tight seal buckle, and particularly relates to the technical field of petroleum pipe threaded connection, the petroleum pipe threaded connection air-tight seal buckle comprises a connecting buckle and an oil sleeve, the connecting buckle is of a cylindrical structure with two open ends, the oil sleeve is in threaded connection with the end of the connecting buckle, and two symmetrically-distributed air grooves and a first seal groove are formed in the connecting buckle; second sealing grooves are formed in the two ends of the connecting buckle correspondingly. A movable sealing assembly is arranged in the connecting buckle, a second sealing piece is arranged in each second sealing groove, a plurality of evenly-distributed air inlet pipes are arranged on the inner wall of the connecting buckle, and the second sealing pieces are communicated with the air grooves through the air inlet pipes. The first sealing piece slides in the adjusting piece, and the second sealing piece seals the bottom of the connecting buckle, so that leakage of gaps caused by connection looseness when the petroleum pipe vibrates under the impact of dynamic load is prevented.

First and second pipe elements are joined end to end by a coupling. The first and second pipe elements have a circumferential groove at an end, and each of the grooves has a floor. A plurality of segments, each having oppositely disposed ends, and a respective connection member positioned at each end, form the coupling. A first end of each segment is connected to a second end of another of the segments such that said segments surround a central space for receiving the second pipe element.

Pipe apparatus can include a coupling device with a seal circumscribing a central axis. The seal further includes a first circumferential pocket at least partially defined by a first and second circumferential flange. A fluid guide device positioned at least partially within the first circumferential pocket includes a plurality of segments that are radially arranged to circumscribe the central axis. The fluid guide device at least partially defines a fluid path. Methods can include using the coupling device to couple a first end portion of a first pipe segment to a second end portion of a second pipe segment. Methods of using the pipe apparatus can include passing fluid through the fluid path to cool the seal.

A pipe coupling has two segments with action surfaces in facing relationship. Attachment elements on each segment, in the form of lugs, accommodate adjustable fasteners which draw the segments together when tightened. Support surfaces on the lugs engage one another to visually indicate that a proper installation of the coupling has been achieved.

The invention relates to the technical field of valve detection, in particular to a valve with a leakage detection function, which comprises a valve body, the two sides of the valve body are respectively connected with the end parts of an input pipe and an output pipe, a valve core is rotatably sealed in the valve body, a through hole is formed in the middle of the valve core in a penetrating manner, and a detection hole is formed in the bottom of the through hole in a penetrating manner; the bottom of the valve body is in threaded connection with the input end of the pressure gauge through a detection pipe, a second valve element is rotationally sealed in the detection pipe, a second detection hole of the second valve element is perpendicular to the detection hole, and the valve body is in threaded connection with the input end of the pressure gauge through the detection pipe. And the accuracy of detecting the pressure in the pipeline structure by the pressure gauge is also improved.

To provide a sealing material which is compressed to seal between a seal surface of a socket and an outer peripheral surface of a spigot, and which satisfies both requirements from a stress aspect during compression and requirements from a watertightness aspect.SOLUTION: A sealing material comprises: a heel part 13 that is fitted into a fitting groove 21 of a socket 2, and a valve part 10 that is compressed by being sandwiched between a sealing surface 23 of a socket 2 and an outer peripheral surface of a spigot 3. The valve portion 10 has a first convex part 11 formed on an outer peripheral side, and a second convex part 12 formed on an inner peripheral side. A first radius R1 of a first circle 11c including the arc-shaped outline of the first convex part 11 is smaller than a second radius R2 of a second circle 12c including the arc-shaped outline of the second convex part 12. The center C1 of the first circle is located inside the sealing surface 23 of the socket 2 in a pipe diameter direction, and is included in the circumference of the second circle 12c. The center-to-center distance between the center C1 of the first circle and the center C2 of the second circle in the pipe axial direction is smaller than the difference between the second radius R2 and the first radius R1.SELECTED DRAWING: Figure 2

A gasket 4 includes: a cylindrical body portion 10 having a communication hole 10a for providing communication between flow passage holes 2c, 2c formed in two fluid devices 2, 2, respectively; and an annular primary sealing portion 11 projecting from a radially inner side of an axially outer end portion of the body portion 10 toward an axially outer side and to be press-fitted into an annular primary sealing groove 2d formed in each fluid device 2. In a state before the primary sealing portion 11 is press-fitted into the primary sealing groove 2d, an entirety of an inner circumferential surface 10b of the body portion 10 is formed such that a diameter thereof gradually decreases from both axially outer ends thereof toward an axially inner side.

The present invention discloses a GIS sealing ring for nuclear power plants and its sealing structure, which belongs to the technical field of sealing rings, and comprises a soft ring body, a pressure-bearing external support structure is arranged in the soft ring body, an external support sealing structure is arranged on the inner edge and the outer edge of the soft ring body, and a joint surface cover structure is arranged on the upper and lower surfaces of the soft ring body. An abutment ring groove for plugging and matching with an abutment ring is arranged in the middle side of the tight pressure groove, and a second abutment ring is arranged in the tight pressure groove and located on both sides of the abutment ring groove; a limit ring is arranged on the outer side of the tight pressure groove, and the limit ring is inserted between the abutment ring and the base ring; a sealing groove is arranged in the tight pressure groove and located on the side of the limit ring, and the sealing ring is inserted into the sealing groove. Since the external support sealing structure and the inside of the soft ring body both use negative Poisson's ratio ring sheets as internal supports, after the nuts on the sealing structure are locked and the mounting bolts are installed, not only can the installation sealing characteristics be maintained, but also the matching strength of each combined section is increased under the pressure of the insulating gas in the trachea.

A pipe coupling has two segments with lugs adapted to receive adjustable fasteners to draw the segments together to join pipe elements. Each lug has an inner surface and a stop surface in spaced relationship. The stop surfaces on corresponding lugs contact each other when the adjustable fasteners are tightened.

A pipe coupling includes a coupling body comprising a first coupling segment and a second coupling segment, each of the first and second coupling segments defining a first end and a second end opposite the first end; a fastener mounted to the coupling body and configured to tighten the pipe coupling from an untightened configuration to a tightened configuration; and an installation indicator arranged between the first end of the first coupling segment and the first end of the second coupling segment, wherein the installation indicator is clamped between the first and second coupling segments in the tightened configuration.

A hydraulic cylinder may include a cylinder, a rod slidingly disposed in the cylinder, and a scraper assembly. The cylinder extends between a first end and a second end and includes a retention feature positioned adjacent to the first end. The scraper assembly circumscribes the rod and the cylinder. The scraper assembly includes a ring, a collar and a plate. The ring includes an outer surface and a radially spaced inner surface. The inner surface contacts a portion of the rod. The collar includes a first portion adjacent to a first surface contacting the outer surface of the ring and a second portion adjacent to a second surface contacting the retention feature of the cylinder. The plate contacts the first surface of the collar. The collar and the plate cooperate to radially compress the first semi-circular ring and the second semi-circular ring against the rod.

A quick-connector assembly for joining abutting flanged ends of two tubular members includes first and second connector portions joined by a rotatable hinge having a hinge pin coupling the first connector portion and the second connector portion so that the first and second connector portions encircle about abutting flanged ends of the tubular members when the first and second connector portions are in a closed position. Further, a stand having a bracket with at least one hole for accommodating the hinge pin is designed to at least partially support the weight of the connector assembly and the flanged ends of the tubular members.

A coupling for joining pipe elements has cast segments attached end to end surrounding a central space. The segments define a channel that receives a gasket. Side surfaces within the channel have angularly oriented capture surfaces which are engaged by bulbous rims on the gasket which prevent the gasket from being dislodged from the channel when at least one pipe element is inserted into the central space. Side surfaces may also have support surfaces between the capture surfaces. The gasket supports the segments in a preassembled state wherein the segments are in spaced relation sufficient to permit insertion of one or more pipe elements while the segments are attached end to end.

The utility model discloses a water conservancy pipeline interface connecting device, which belongs to the field of water conservancy and comprises a first hoop body and a second hoop body which are matched with each other to form a hoop structure, a sealing ring capable of performing telescopic compensation is arranged between the first hoop body and the second hoop body, and compensation components are arranged on the first hoop body and the second hoop body. A connecting bolt is arranged on the first hoop body through a first connecting plate, a connecting screw hole matched with the connecting bolt is formed in the second hoop body through a second connecting plate, an air bag capable of being inflated and deflated is arranged in the sealing ring, and an inflation nozzle communicated with the air bag is arranged on the sealing ring. And the charging connector is in threaded connection with a locking cap. According to the water conservancy pipeline connector connecting device, through the air bag inflation and deflation design of the sealing ring, when the pipeline expands with heat and contracts with cold due to temperature change, the air bag can be subjected to inflation and deflation adjustment according to the actual change of the pipeline, so that the air bag is tightly attached to the inner wall of the pipeline, and it is guaranteed that the sealing performance is not affected.

A piping system for oil and gas in very deep water includes two opposing flanges and a seal ring between the flanges. Each flange has an annular ridge between concentric grooves. The seal ring has a radial web that connects longitudinal inner and outer sealing portions, which are received in the concentric grooves with the annular ridge received sealingly between the inner and outer sealing portions. The inner sealing portion of the seal ring is longer than the outer sealing portion. The web is as thick as or thicker than the inner and outer sealing portions. The seal ring comprises inner and outer concentric hollow cylinders having a non-uniform wall thickness and an annular rib that connects the hollow cylinders together, where one cylinder is longer than the other and where the rib has a longitudinal thickness that is as great as the radial thickness of the walls of the hollow cylinders.

A pipe joint of the present disclosure comprises: an outer joint pipe having a first inner peripheral surface portion on one side in an axial direction and a second inner peripheral surface portion on the other side in the axial direction, and allowing an outer peripheral surface of a pipe to be fitted onto the first inner peripheral surface portion from the one side in the axial direction; an inner joint pipe having a first outer peripheral surface portion on the one side in the axial direction that is fitted onto an inner peripheral surface of the pipe from the other side in the axial direction, a second outer peripheral surface portion that is fitted onto the second inner peripheral surface portion from the other side in the axial direction, and an end portion on the other side in the axial direction that is connected to a fluid device; an annular seal member that is installed on the first outer peripheral surface portion and seals a gap between the first outer peripheral surface portion and the inner peripheral surface of the pipe; a first restriction portion that restricts the pipe from moving toward the one side in the axial direction relative to the first inner peripheral surface portion by fitting the outer peripheral surface of the pipe on the first inner peripheral surface portion; and a second restriction portion that restricts the inner joint pipe from moving toward the other side in the axial direction relative to the second inner peripheral surface portion by fitting the second outer peripheral surface portion on the second inner peripheral surface portion.

The invention discloses an interface-adjustable butterfly valve with a leakage alarm function, and relates to the field of butterfly valves, the interface-adjustable butterfly valve comprises a valve body and a sealing valve plate rotatably mounted in the valve body, the upper end of the valve body is provided with a driving structure, the driving structure is fixedly connected with the sealing valve plate, and the outer side of the valve body is fixedly provided with two groups of mounting sleeves; a detection head is installed in the installation sleeve in a clamped mode, the outer side of the valve body is sleeved with two sets of lower clamping rings and upper clamping rings, and the lower clamping rings are rotationally connected with the upper clamping rings. According to the interface-adjustable butterfly valve with the leakage alarm function, external connection pipes of different sizes can be limited through the arc-shaped clamping blocks, so that the butterfly valve can be in butt joint with the external connection pipes of different sizes, the lower clamping ring and the upper clamping ring can be mounted and dismounted, and thus mounting and dismounting of an alarm are completed; and the alarm can be matched with the detection head to detect leaked objects, so that detection of the butterfly valve is completed, and the detection effect of the butterfly valve is effectively improved.

The utility model belongs to the technical field of plastic pipelines, and particularly relates to a plastic pipeline connecting device which comprises a workbench, a pair of lower clamping blocks are arranged on the upper side of the workbench, and upper clamping blocks are hinged to the upper surfaces of the lower clamping blocks. The two pipeline bodies are placed on the lower clamping blocks correspondingly, the locking rods are rotated upwards to be perpendicular to the upper clamping blocks, the locking blocks are screwed to be tightly attached to the upper clamping blocks, and therefore the pipeline bodies are clamped, the connectors are inserted into the outer walls of the pipeline bodies through the position between the two pipeline bodies, then the gaskets are inserted, and the connecting pipe is inserted into the outer wall of one pipeline body. A rocker is rotated to drive a two-way lead screw, so that two sliding blocks are close to each other, two pipeline bodies are attached, a screw is inserted into a mounting plate, a nut is screwed to enable a connector, a connecting pipe and a gasket to be tightly attached, an air bag is inflated through an inflating valve, the air bag expands to clamp the two pipeline bodies, the sealing performance is improved, and the air bag is not prone to being affected by thermal expansion and cold contraction; the connecting effect is good, and the gasket further improves the sealing performance.

The invention provides a pipe fitting connector locking structure which comprises a fixing sleeve, limiting clamping rings are installed at the two ends of the fixing sleeve correspondingly, locking rails are installed on the two limiting clamping rings correspondingly, positioning grooves are formed in the two limiting clamping rings correspondingly, adjusting plates are installed in the positioning grooves, the locking rails are located on the rear sides of the adjusting plates, and the locking rails are located on the rear sides of the adjusting plates. A locking rail is installed on the rear side of the adjusting plate and located on the outer side of the positioning groove, a locking structure is installed on the rear side of the adjusting plate and located in the locking rail, a plurality of clamping plates are installed in the limiting clamping ring, adjusting pieces are installed on the clamping plates, and a sealing structure is installed in the fixing sleeve. The fixing sleeve has the following beneficial effects that the calibers of the two ends of the fixing sleeve can be conveniently adjusted according to the calibers of the pipe fitting connectors, and the adaptation degree between the fixing sleeve and the pipe fitting connectors is improved.

The invention discloses a GIS sealing ring for a nuclear power station and a sealing structure of the GIS sealing ring, and belongs to the technical field of sealing rings, the GIS sealing ring comprises a soft ring body, a pressed outer supporting structure is arranged in the soft ring body, outer supporting sealing structures are arranged on the inner edge and the outer edge of the soft ring body, and junction surface sealing structures are arranged on the upper surface and the lower surface of the soft ring body. An abutting ring groove matched with the abutting ring in an inserted mode is formed in the middle side of the dense pressing groove, and second abutting insertion rings are arranged in the dense pressing groove and located on the two sides of the abutting ring groove. A limiting baffle ring is arranged on the outer side of the dense pressing groove, the limiting baffle ring is inserted between the abutting sealing ring and the bearing platform ring, an abutting sealing groove is formed in the dense pressing groove and located on the side of the limiting baffle ring, and the abutting sealing ring is inserted into the abutting sealing groove. Due to the fact that the negative Poisson's ratio ring pieces are adopted in the outer supporting sealing structure and the soft ring body to serve as inner stress supports, after a nut on the sealing structure locks an installation bolt, the installation sealing performance of the sealing structure can be stably kept, and the matching strength of all the combination sections is improved under the stress of insulating gas pressure in a gas pipe.

A quick connect fitting assembly. The quick connect fitting assembly comprises a first connector (100), a second connector (200), and a circlip (300). The second connector (200) is provided with an insertion portion (210) inserted into the first connector (100); the circlip (300) is mounted on the first connector (100), and the circlip (300) comprises a limiting section (310) and a connecting section (320) located at one end of the limiting section (310); a notch (110) is provided on the side wall of the first connector (100); a first annular groove (211) directly facing the notch (110) is provided on the outer peripheral surface of the insertion portion (210); the limiting section (310) passes through the notch (110) and is snap-fitted into the first annular groove (211); and the connecting section (320) is provided with a stressed portion (321), and the cross-sectional dimension of the stressed portion (321) is less than that of the remaining portion of the circlip (300). During insertion, the insertion portion of the assembly easily pushes against the limiting section of the circlip such that the stressed portion of the circlip elastically deforms, thereby reducing the resistance of the circlip to the insertion portion, thus reducing the required insertion force for the insertion of the second connector, and facilitating an operator to insert the insertion portion of the second connector into the first connector.

A pipe fitting can include an inlet, an outlet, a passageway along an axis between the inlet and the outlet, and a gasket. The inlet includes an inner wall at the passageway, an outer wall outward from the inner wall relative to the axis, and a groove between the inner wall and the outer wall. The gasket includes a head and a collar extending from the head, the gasket sized to be received in the groove such that the head is inside the groove and the collar is outside the groove.

Provided is a water shut-off structure, for a pipe joint, where component versatility can be improved without decreasing watertightness.　A rubber packing 3 comprises: an annular first rubber member 4 where an inner circumferential surface 41 contacts an outer circumferential surface 100a of a pipe 100; an annular second rubber member 5 stacked on an outer peripheral surface 42 of the first rubber member 4 in a pipe radial direction Y of the pipe 100; and stacking retention means 6 for retaining the stacked state of the first rubber member 4 and the second rubber member 5. The first rubber member 4 is made of a rubber material that is harder than the second rubber member 5. In the stacked state of the first rubber member 4 and the second rubber member 5, an end part 43 on a receptacle part side of the first rubber member 4 protrudes further in a pipe axial direction X of the pipe 100 than an end part 53 on the receptacle part side of the second rubber member, and a portion of a protruding part 43a of the end part 43 is disposed between an inner end part 21a of the receptacle part and the outer circumferential surface 100a of the pipe 100. The second rubber member 5 faces a tapered surface 21c of the receptacle part 21.

A system for coupling pipe segments endwise to each other comprise a tubular hub secured proximate to an end face of each pipe segment, each hub having a radially extending mounting block therearound, a seal extending around the hubs between the mounting blocks and a clamping ring sized to extend around the tubular hub, said clamping ring having a radially extending positioning lip at each end of wherein the positioning lips surround the mounting blocks.

A pipe fitting seal includes a sealing ring for being arranged between two pipe elements, a connecting base is arranged on an outside of the sealing ring, an outer biasing portion is arranged on an inner of the connecting base, a first abutting surface is formed on an outer wall of the connecting base, the first abutting surface can be squeezed to drive the outer biasing portion to abut against an outer wall of the pipe element, and a second abutting inclined surface is formed on a side of the connecting base away from the sealing ring, the second abutting inclined surface can be squeezed to drive the sealing ring to abut against an end of the other pipe element.

A gripping assembly for a pipe fitting includes a substantially annular ramp defining a ramp void therethrough, the substantially annular ramp further defining an angled ramp surface angled radially inward relative to the ramp void; and a annular grip ring defining a ring void therethrough, the substantially annular grip ring further defining an inward gripper surface and an angled ring surface, the angled ring surface extending radially inward relative to ring void and contacting and slidable along the angled ramp surface of the substantially annular ramp; wherein the ramp void and the ring void are configured to receive a pipe end of a pipe therethrough, the substantially annular ramp is configured to bias the substantially annular grip ring radially inward towards the pipe, and the inward gripper surface is configured to grip an outer pipe surface of the pipe.

The invention discloses a universal joint device for pipeline connection, and relates to the technical field of pipeline connection, the universal joint device comprises a joint sleeve, universal ball heads are movably nested at the two ends of the joint sleeve, and when a limiting sleeve enters the joint sleeve, limiting rubber strips seal the ends, close to the rotating ends, of the universal ball heads; the compensation air bag part radially seals the other end of the universal ball head, the arc-shaped metal plate arranged in the compensation air bag part is bent along with the compensation air bag part, the cambered surface curvature of the arc-shaped metal plate is larger than the curvature of the outer wall of the universal ball head, and the compensation air bag part is more tightly attached to the outer wall of the other end of the universal ball head through the elastic force of the arc-shaped metal plate. The sealing gasket seals the middle of the universal ball head under the action of the compensation spring, triple sealing is formed by the limiting rubber strip, the sealing gasket and the compensation air bag piece, the probability of leakage during rotation of the universal ball head can be greatly reduced, and the stability of the device during long-term use is guaranteed.

An end fitting for connecting two sections of pipe to one another can comprise a first tubular member, and a second tubular member disposed coaxially about the first tubular member to delimit an annular gap therebetween for receiving an end portion of a pipe. A sleeve can be disposed coaxially about the first tubular member and within the annular gap such that a pressurised medium is receivable between the sleeve and one of first and second tubular members to move at least a portion of the sleeve radially and thereby clamp the end portion of the pipe between the first and second tubular members when received in the annular gap. The end fitting may have particular application in conveying oil and gas field fluids, including hydrocarbon fluids.

A pipe coupling has a housing, a mounting portion extending away from a first side of the housing, and a hinge portion extending away from a second side of the housing. The housing is defined by a first axial wall, a second axial wall spaced apart from the first axial wall, and a semi-cylindrical outer surface extending between the first axial wall and the second axial wall. Each of the first axial wall and second axial wall have a semi-annular shape defining a passage radially inward from the first axial wall and second axial wall. The mounting portion has a flange and a hole formed through the flange. The hinge portion includes a tab and a frame. The tab extends partially between the first axial wall and the second axial wall, and the frame also extends partially between the first axial wall and the second axial wall.

A mechanism for restraining pipe against both internal and external forces at a pipe or fitting connection and to join and seal at least two pipes to form a pipeline featuring an improved restraint mechanism. The restraint mechanism includes a circumferential casing and a companion grip ring, both of which are received within a mating groove provided in the belled end of a female pipe. The grip ring is made up of a series of arc-shaped gripping elements which are interconnected by discrete elastomeric segments. The gripping elements are separated by gaps so that a flexible hinge region is created by the elastomeric segments between adjacent gripping elements. The elastomeric segments provide both axial and radial spring action to the assembly.