359results about "Fluid pressure sealed joints" patented technology

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 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 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 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.

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 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.

The utility model relates to the technical field of electromagnetic valves, and discloses a dustproof energy-saving electromagnetic pulse valve which comprises a valve body, a connecting shell is fixedly connected to the bottom end of the valve body, air bags are fixedly connected to the front end and the rear end of the connecting shell, an electromagnet is fixedly connected to the top end of the valve body, and fixing rings are fixedly connected to the outer walls of the left end and the right end of the valve body. The back-to-back ends of the fixing rings are connected with a plurality of screws through transmission sets, the outer walls of the back-to-back ends of the screws are in threaded connection with moving blocks, the outer walls of the moving blocks are connected with extrusion plates through extrusion sets, the left end and the right end of the valve body are fixedly connected with fixing pipes, and the inner walls of the fixing pipes are fixedly connected with air bags. A circulating fan is mounted at the top end of the inner wall of the connecting shell. According to the utility model, the flexible butt joint of the valve body and pipelines with different diameters is realized, the installation process is simplified, the universality and applicability of equipment are improved, dust entering the valve body is reduced, and the liquid flow adjusting power of the valve body is maintained.

A pipe fitting includes a fitting body defining an inner body surface, an outer body surface, a first axial fitting end, and a second axial fitting end, the inner body surface defining a fitting bore extending from the first axial fitting end to the second axial fitting end, and an assembly window extending through the fitting body from the outer body surface to the inner body surface.

A pipe belling process where a heated thermoplastic pipe end is forced over a sealing gasket on a forming mandrel, with the pipe being subsequently cooled to retain the gasket in an internal groove simultaneously formed in the pipe end. The sealing gasket is a two-component gasket with an elastic component and a plastic component. The elastic component is stretched over a portion of the plastic component during assembly with the plastic component acting as a belling ramp for the gasket during the subsequent pipe belling operation.

The invention relates to an installation structure of an air supply pipeline for construction and decoration of a clean laboratory, and relates to the technical field of civil engineering installation, the installation structure comprises a hanging bracket assembly and an air pressure activation type sealing flange connector assembly, the hanging bracket assembly comprises an installation frame and an annular built-in frame, and extrusion type limiting mechanisms which are symmetrically distributed are arranged on the inner wall of the annular built-in frame; the extrusion type limiting mechanism comprises an extrusion plate, a threaded rod, a fixing block and a non-return mechanism. The air pressure activation type sealing flange connector assembly comprises a non-porous flange head, a rubber sealing ring, a pressure sensor and an elastic air bag. The contact pressure between the rubber sealing ring and the flange heads is monitored in real time through the pressure sensor, when the pressure is insufficient (indicating the risk of leakage), the elastic air bag between the two flange heads is activated immediately, the air bag expands to fill a flange gap to achieve secondary sealing, the rubber sealing ring is further extruded to improve the fitting degree, and the problem of rubber aging leakage is solved; and linkage leakage prevention of preliminary sealing and dynamic complementary sealing is achieved.

To provide a gasket capable of improving seal performance, and a seal structure incorporated with the gasket.SOLUTION: An annular gasket 10 seals between two members, a first member 1 and a second member 5, which are assembled so as to face each other. The annular gasket comprises: an annular first seal part 13 made of an elastic material, which is provided on the first member side of an annular core 11, and protrudes toward the first member to be in contact with the first member; and an annular second seal part 21 made of an elastic material, which is provided on the second member side of the core, and protrudes toward the second member to be in contact with the second member. The first seal part and the second seal part are arranged so as not to overlap each other when viewed in a direction in which the first member and the second member face each other, and are formed so as to elastically deform so as to collapse toward an outer diameter when the two members are assembled.SELECTED DRAWING: Figure 1

A coupling permitting rotation of pipe elements about their longitudinal axes includes a first ring attachable to a first of the pipe elements. The first ring has a first collar projecting outwardly therefrom and defining a low friction bearing surface. A housing defines a bore therethrough surrounding a longitudinal axis arranged coaxially with the bore. The housing has a first end and a second end oppositely disposed from one another. The first end is adapted to receive the first ring coaxially within the bore. The housing comprises a first shoulder and a first channel. When the first ring is received within the bore at the first end, the first collar is positionable between the first shoulder and the first channel. The bearing surface is engageable with the first shoulder. Engagement between the bearing surface and the first shoulder allows rotation of the first ring with respect to the housing.

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

The invention discloses liquid fuel filling equipment for ship green energy filling, and relates to the technical field of liquid fuel filling equipment. The device comprises a fixing frame, a liquid storage container is fixedly connected to the inner wall of the fixing frame, an oil pipe is fixedly connected to the top of the liquid storage container, and a filling head is fixedly connected to the end, away from the liquid storage container, of the oil pipe. Through cooperation of the telescopic plate, an electric push rod, a fixing block, a first supporting block, a second supporting block, an arc block, a bolt and a protective barrel, the problem that an oil pipe and a filling head fall into a river due to errors of a worker and a user when the worker and the user manually take and receive the oil pipe and the filling head is avoided; and meanwhile, the second supporting block moves to drive the protection barrel to move, so that the protection barrel can protect the oil pipe hung on the river, and the problem that the oil pipe shakes due to sudden strong wind, and consequently connection between the filling head and the filling pipe of the ship is not stable is solved.

Provided is a stainless steel coupling assembly for connecting pipes, in which two or more stainless steel couplers are placed opposite to connect the pipes continuously placed along the axial direction, and the pipes are connected in such a way that the plurality of couplers are disposed around the pipes and are fastened to each other. The coupler includes a body part provided with an internal space where a sealing member is disposed; a locking part that extends inward in the radial direction at both ends of the body part in the width direction and is inserted into a fastening groove formed in the pipe; and a fastening part disposed at both ends in the circumferential direction of the body part and through which a fastening member is fastened. On the top surface of the body part, a first rib protruding outward in the radial direction is formed.

System for conveying at least one transport capsule comprising: - a pipe (2) comprising first and second trunk (21, 22) that are reciprocally assembled; - a coating (3) whose function is structural and of at least partially waterproofing the pipe (2) and comprising tensioned ribbon-shaped means (31) that wraps and compresses at least one portion of the pipe (2). The ribbon-shaped means (31 ) is made of fibre-resin composite material and comprises said fibres impregnated in said resin.

The utility model relates to the technical field of pipeline connection, and discloses a pipeline connecting device which comprises a left fixing pipe, and the outer surface of the left fixing pipe is in threaded connection with a left inner threaded pipe. The sealing assembly is arranged, after two sections of water pipes to be butted are inserted into the left fixing pipe and the right fixing pipe respectively, the left inner threaded pipe and the right inner threaded pipe are rotated, the interior of the air bag can be pressurized, the surface of the air bag is attached to the outer surface of the pipeline in a sealed mode due to strong pressure in a sealing cavity, and meanwhile when a sealing plate slides, the air bag is prevented from being blocked. The sealing rod drives the sliding column to slide, the positioning rod slides in the direction close to the pipeline through connection of the positioning block and the limiting block till the end face of the positioning rod pierces the surface of the pipeline, the firmness of the left inner threaded pipe or the right fixing pipe connected with the pipeline can be improved, and the structural stability of the whole water conveying system is guaranteed; and the problems of leakage, interruption of water supply and the like caused by loose connection are reduced.

The utility model relates to the technical field of pipeline connection, in particular to a pipeline connecting mechanism for sewage treatment, which comprises two annular sleeves with hollow structures, annular air bags arranged on the inner walls of the two annular sleeves, and a connecting rod arranged on the annular air bags. The outer wall of the annular sleeve is provided with a one-way air inlet valve and an air outlet which are communicated with the annular air bag; the elastic pipe is connected between the two annular sleeves and is used for adapting to different spacing and angle changes between the sewage pipelines; the number of the pressing units is two. According to the utility model, a double-sealing structure is formed through the tight attachment of the sealing ring and the outer wall of the pipeline and the expansion extrusion of the annular air bag, so that the sewage leakage can be effectively prevented, and the sealing performance of the pipeline joint is ensured. The mode that the two-way lead screw drives the arc-shaped clamps to conduct clamping is adopted in the pressing units, operation is easy, complex welding or bolt connection is not needed, the mounting and dismounting time is shortened, and the labor cost is reduced.

The utility model discloses a high-precision laser opto-acoustic transient smoke intensity sensing and detecting mechanism which comprises a smoke intensity sensing and detecting mechanism body and an upper connecting mounting column arranged on the smoke intensity sensing and detecting mechanism body, a connecting through pipe is arranged on the side face of an upper connecting mounting column, a built-in connecting threaded column is arranged on the side face of a built-in moving plate, a second rotating adjusting knob rotates to drive the built-in connecting threaded column to move leftwards or rightwards through the thread effect, and the built-in telescopic connecting body can be stretched and compressed through movement of the second rotating adjusting knob; the air in the built-in telescopic connector can be extruded into the inner side connecting rubber air bag ring to expand the inner side connecting rubber air bag ring, otherwise, the inner side connecting rubber air bag ring is concave inwards; according to the improvement of the utility model, corresponding adjustment can be carried out according to an actually connected ventilation pipeline, so that the rubber air bag ring connected at the inner side expands and extrudes the connection part to realize tight connection, and the use safety stability and the use practicability of the high-precision laser photoacoustic transient smoke intensity sensing and detecting mechanism are further improved.

The present invention relates to a device for precise-fitting sealing of an opening (2) surrounded by a non-planar sealing surface (3) of an apparatus (1), the device comprising an adapter (4) having as a contact surface a first end face (5) with a first surface profile (6) corresponding to the precise-fitting negative profile of the non-planar sealing surface (3), and at least one flat seal (8) disposed between the non-planar sealing surface (3) of the apparatus (1) and the first end face (5) of the adapter (4). Furthermore, the present invention relates to a sealing system including such a device, the use of such a device, a method for manufacturing such a device, and a method for manufacturing an adapter (4) for such a device.

The utility model belongs to the technical field of pipeline connection, and particularly relates to a PVC pipe fitting connecting mechanism which comprises a main pipe, a rubber ring is fixedly connected to the outer wall of the right side of the main pipe, a first connecting pipe is slidably connected to the right side of the main pipe, a supporting ring is fixedly connected to the inner end of the left side of the first connecting pipe, and a liquid bag is fixedly connected to the inner side of the supporting ring. The liquid bag is connected with the rubber ring in a clamped mode, a pressurizing assembly is arranged at the top end of the liquid bag, and a limiting ring is fixedly connected to the middle end of the inner side of the first connecting pipe. According to the connecting mechanism of the PVC pipe fitting, the threaded sleeve, the piston and the sliding block are driven by the lead screw to move downwards to pressurize internal pressurizing liquid, the pressurizing liquid is conveyed into the liquid bag through the second connecting pipe, and then the liquid bag is filled with the pressurizing liquid so that the liquid bag can expand outwards, so that the main pipe and the supporting ring can be expanded tightly; in this way, sealing between the main pipe and the first connecting pipe is achieved, and the problem that a large gap exists between the main pipe and the first connecting pipe can be solved.

To provide a pipe structure and pipe joint that reduces the number of parts and allows for easy disassembly and connection of the inner and outer pipes. [Solution] The pipe structure 1 comprises an inner pipe 10, an outer pipe 20 that forms an annular insertion gap between itself and the inner pipe 10, and a pipe joint 30 that connects the inner pipe 10 and the outer pipe 20. The pipe joint 30 comprises a first sleeve member 40 having a groove 42 filled with liquid L on its end face 41 opposite to the insertion direction D of the inner pipe 10 relative to the outer pipe 20, a second sleeve member 50 having a projection 52 that protrudes toward the first sleeve member 40 on its end face 51 on the insertion direction D side, and a fastening means 60 that fastens the second sleeve member 50 to the first sleeve member 40 such that the projection 52 presses the liquid L in the groove 42. The groove 42 is provided at a position eccentrically inward in the radial direction from the fastening position where the second sleeve member 50 is fastened to the first sleeve member 40.

There is provided an end fitting for connecting two sections of pipe to one another, the end fitting comprising 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 is 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 seal assembly can include a sealing component and a spring energizer located within a seal cavity or spring cavity of the sealing component. The sealing component provides an exterior surface for providing protection of the seal cavity and spring energizer from an external or contaminated environment, such as the atmosphere. The sealing component can have two distinct first and second sealing points. Each distinct first sealing point can have two discrete first sealing points and each second sealing point can have two discrete second sealing points. Part of the spring energizer can extend externally of the sealing component.