57 results about "Pressure Tubing" patented technology

The invention relates to car carried engine used compressed air as power. It includes engine body, crank shaft, gear box, and belt sheave. The end of the crank shaft is connected with piston in cylinder. The cylinder cover is set intake pressure pipe and exhaust pipe. The engine body is set engine speed, dead point-distinguishing signal generator, and engine crank shaft dish rotating electric machinery. The crank shaft is set one way overrunning clutch. Compared with the existing technique, it has the advantages of environmental protection and simple structure.

The invention relates to a method for detecting leaks in at least one brake pressure line (26, 28), under braking pressure (C), of a compressed air brake device (1) of a rail vehicle comprising an indirect electro-pneumatic brake, wherein the indirect electro-pneumatic brake has a master air vessel line (HB) to hold a master air vessel line pressure, and a compressed air source (7) supplying the master air vessel line (HB) with compressed air and is controlled by the master air line pressure in a master air line (HL), wherein the at least one brake pressure line (26, 28) under braking pressure (C) extends between a valve device (12), which controls the braking pressure (C) in dependence upon the master air line pressure in the master air line (HL), and at least one brake actuator (3), and wherein the method comprises a braking test carried out when the rail vehicle is stationary, having at least the following steps: a) checking whether, in the event of replenishment of compressed air from the compressed air source (7) into the master air vessel line (HB) being cut off, the master air vessel line pressure exceeds a preset limit value; and if so, b) controlling the master air line pressure in the master air line (HL) to apply the at least one brake actuator (3). According to the invention, within the framework of the braking test, the following further steps are carried out: c) monitoring the master air vessel line pressure to see whether c1) the value of the master air vessel line pressure arising after application of the at least one brake actuator (3) deviates by more than a preset difference from a preset plausible value for the master air vessel line pressure, and/or c2) in the period between the beginning and the end of the application of the at least one brake actuator (3), the pressure gradient of the master air vessel line pressure exceeds a preset pressure gradient; and d) if c1) and/or c2) applies, generating an error message that there is a leak in the at least one brake pressure line (26, 28).

The invention relates to the technical field of blowout preventers in oil tubes in underbalance well completion tubing operation, in particular to a pitching pressure-out opening oil tube constant-pressure floating valve, which comprises a body, a valve spool, a torsion spring, a valve and a bucket. A concave platform is arranged on the lower portion of the body, a convex platform matched with the concave platform is arranged on the upper portion of the bucket, the outer wall of the concave platform and the inner wall of the convex platform are fixedly mounted together, the valve spool is fixedly mounted inside the concave platform through a grooving flat end constant-pressure locking nail, and the outer diameter of the valve spool is matched with the inner diameter of the body. The floating valve is reasonable and compact in structure and convenient in use, high-pressure oil and gas flow is effectively prevented from blowing out through an oil tube by the aid of the valve, possible well control accidents in the underbalance tubing operation are decreased, a blowout prevention tool in a pressure tubing is improved, and the floating valve achieves the purposes of simple operation procedures, convenience in use, low cost, safety and reliability.

A technique for measuring vapor pressure and liquid level of a volatile liquid contained in a tank. An integrated measuring apparatus sequentially measures vapor pressure and differential pressure by use of a single pressure sensor and a switching valve which switches between paths for measurement of the vapor pressure and the differential pressure. In addition, the integrated measuring apparatus includes a pressure sensor configured to sequentially measure vapor pressure and total pressure or the combination of the vapor pressure and liquid pressure; and a switching valve configured to be connected to a vapor pressure tube and a liquid pressure tube and switch between connection paths with at least one input port of the pressure sensor, wherein the vapor pressure tube is connected to an upper part of the tank and the liquid pressure tube is connected to a lower part of the tank.

The invention discloses a composite steel-plastic pressure tube and a manufacturing method thereof, and belongs to the technical field of composite steel-plastic tubes. The composite steel-plastic pressure tube comprises an outer plastic layer, an outer glue layer, an inner glue layer and an inner plastic layer. A steel tube with the rough surface is arranged between the outer glue layer and the inner glue layer. In the manufacturing process of the composite steel-plastic pressure tube, a laser texturing roller carries out rolling and texturing on an adopted steel plate, so that a rough surface is formed on the steel plate, and then the steel plate is processed into steel belts with required widths; the steel belts are rolled to be of tubular shapes under the extrusion state, and an inner plastic layer tube coated with hot melt glue is inserted synchronously; the tungsten electrode argon arc butt welding process is adopted for welding of welding lines, and a steel tube is formed; through a high frequency heater, adhesion of the inner plastic layer tube and the steel tube is achieved; the hot melt glue coats the steel tube, and the outer plastic layer is arranged outside the steel tube. According to the composite steel-plastic pressure tube, the adhesion strength between the outer plastic layer and the steel tube is high, the pressure-bearing capacity is high, and the production cost is low.

The invention relates to the technical field of plastic pressure pipes, in particular to a composite reinforced winding-type pressure pipe. The composite reinforced winding-type pressure pipe comprises an outer plastic layer, an inner plastic layer and a long glass fiber sheet reinforced plastic layer arranged between the outer plastic layer and the inner plastic layer. The long glass fiber sheet reinforced plastic layer comprises a long glass fiber sheet and a plastic composite layer wrapping the long glass fiber sheet, and the long glass fiber sheet is wound on the outer surface of the inner plastic layer through the wrapping plastic composite layer to form the long glass fiber sheet reinforced plastic layer; the long glass fiber sheet is composed of regularly-distributed long glass fibers, and the long glass fibers are flaky. The invention further discloses a forming method of the composite reinforced winding-type pressure pipe. Through the composite reinforced winding-type pressure pipe and the forming method of the composite reinforced winding-type pressure pipe, the process that the long glass fiber sheet is wrapped by the plastic composite layer and then wound on the outer surface of the inner plastic layer is simple, the production cost is low, and the yield is high. The pressure resistance is high, and the process stability is good. In addition, the long glass fibers are regularly distributed, so that the strength of the formed pressure pipe is uniform.

A machine permits an end of a thick-walled, high-pressure tubing to be chucked in a collet one time, coned, faced and threaded, using a coning head and threading head which are mounted on a carriage which can be translated laterally between three positions and the coning and threading heads parallel to the longitudinal axis of the workpiece to complete the coning and threading operations.

A shock absorber has a pressure tube, a piston slidably disposed in the pressure tube and a piston rod attached to the piston and extending out of the pressure tube. The end of the piston rod extending out of the pressure tube defines a contoured surface which can be engaged to prohibit rotation of the piston rod. In one embodiment the contoured surface is defined by an inner surface of a bore. In another embodiment, the contoured surface is defined by an exterior surface of an extension to the piston rod.

A Kiel-style pressure probe includes pressure tubing having a remote sending end, the pressure tubing extending through an open-ended shroud, wherein the shroud has a diameter of at least about 0.375 to 0.50 inch and wherein a forward end of the shroud is formed with at least two drainage apertures in proximity to the remote sensing tip of the pressure tubing.

Provided is a pressure pipe connection structure that reduces man-hours for machining one or more pressure pipes and does not require high machining precision. Multiple arc members form a ring shape that makes a circle by matching the end faces thereof to each other. Non-penetrating holes may be provided on the outer circumference of the arc members. The ring formed by the multiple arc members has an inner diameter that is smaller than the outer diameter and larger than the inner diameter of a pressure pipe. A cylindrical sleeve has an inner cylindrical surface inside which the entire outer circumferences of arc members are fitted into a hollow internal space, into which respective one or more pressure pipes are inserted from one or more opposing entrances; and multiple through holes, which penetrate from the outside and are provided with female thread ridges. The one or more pressure pipes are cut to a certain length that is suited to the placement site and a groove is grooves cut in the corresponding pressure pipe. The arc members are fitted into the groove, and the arc members are positioned on an inner cylindrical surface by inserting the one or more pressure pipes into a sleeve, the respective through holes and non-penetrating holes are made to communicate with each other, and the one or more pressure pipes are fixed using bolts.

The invention relates to a connection structure for non-pressure tubes between modularized upper floors and lower floors. The structure includes a vent stack and a drainage stack between an upper floor module and a lower floor module. A first direct-connecting pipe fitting is arranged on the top of the vent stack, a first expansion joint is arranged on the middle-upper part and a first four-way built-in fitting is arranged on the lower part. A first fire-retardant collar sleeves the first four-way built-in fitting. The bottom of the first four-way built-in fitting is sleeved with a first built-in pedestal. A second direct-connecting pipe fitting is arranged on the top of the drainage stack, a second expansion joint is arranged on the middle-upper part, a six-way pipe fitting is arranged on the middle-lower part, and a second four-way built-in fitting is arranged on the lower part. The second four-way built-in fitting is sleeved with a second fire-retardant collar. The bottom of the second four-way built-in fitting is sleeved with a second built-in pedestal. A distance is reserved between the two direct-connecting pipe fittings and the upper floor module. The two four-way built-in fittings are located at the same horizontal plane of the lower floor module. With the structure, the connection structure is convenient to construct and low in cost.

The invention relates to the technical field of SF6 equipment, and discloses a gas inflation device of sulfur hexafluoride equipment. The gas inflation device comprises a gas inflation bottle, a long pressure pipe and a closed valve set. The closed valve set comprises a first closed valve and a second closed valve. A gas inflation joint is arranged on the gas inflation bottle. A pressure gage is arranged at the end of the gas inflation joint. One end of the pressure gage communicates with the gas inflation joint, and the other end of the pressure gage is connected with the first closed valve through the long pressure pipe. The second closed valve is arranged at the end, away from the pressure gage, of the long pressure pipe. Therefore, the long pressure pipe is adopted for connecting the gas inflation bottle with the SF6 equipment needing gas inflation, and inconvenience brought by frequent movement of the gas inflation bottle can be effectively avoided. The closed valve set is arranged at the two ends of the long pressure pipe, the situation that SF6 gas is prone to leaking due to the too large length of the long pressure pipe can be avoided, and therefore SF6 gas waste is reduced, and it is guaranteed that positive-pressure SF6 gas exists in the long pressure pipe all the time.

A glue gun stable in pressure and flow comprises a controller, a pushing device and a glue outlet. A gun body is connected with the pushing device through a connection frame. The glue gun stable in pressure and flow further comprises a pressure pipe and a pressure transmitter communicating with the pressure pipe. The controller is connected with the pressure transmitter and the pushing device. A connection piece, a valve rod, a seal guide piece, a valve element and a valve ball fixed to the tail end of the valve rod are arranged in the gun body. The valve element and the connection piece are fixed to the two ends of the gun body correspondingly. The seal guide piece is fixed to the middle in the gun body. The valve element, the pressure pipe and the glue discharge head are sequentially andfixedly connected in a sealed manner. One end of the connection piece is connected with the top end of the valve rod. The other end of the connection piece is fixedly connected with the pushing device. The valve rod penetrates through the seal guide piece. The valve ball at the tail end of the valve rod is matched with the valve element. On the gun body, a glue inlet pipe communicates between theseal guide piece and the valve element. The glue gun stable in pressure and flow has the beneficial effects that the cost is low, the pressure and flow of the glue gun can be guaranteed to be stable,so that the glue output amount is constant, and metering is accurate.

Provided is a hydraulic compression gauge sealing rotation structure which is that a fix pipe and the body or hydraulic station of a hydraulic machine are fixed and installed. A sealing ring is placed at the upper opening part of the fix pipe and a spherical joint is placed on the upper opening part of the fix pipe. A joint is used to fix the spherical joint on the upper opening part of the fix pipe. An annular sealing ring is provided on the joint position of a manometer tube and the manometer tube and the spherical joint are connected and fixed through a screw thread connection method.

A position measuring system, especially for hydraulic valve, having a pressure tube to accommodate an armature is provided, whereby the pressure tube is manufactured by deep-drawing. As a result, a cost-effective manufacturing process can be employed for the pressure tube. The pressure tube can be firmly attached to a valve housing by means of a holding element and, optionally, an attachment flange.

The invention relates to an organ-shaped pinch roller structure which is used for a continuous fiber winding plastic composite pressure pipe production line and can press and stick plastic layers wound in different fiber face states in the manufacturing and winding process of composite pressure pipes and a working method thereof. The organ-shaped pinch roller structure is composed of pressing sheets, multiple swinging arms, shafts C, springs and shafts B, wherein the pressing sheets are located in grooves of the heads of the swinging arms, the swinging arms provided with the pressing sheets penetrate through the shafts C through shaft holes in sequence and constitute an organ-shaped pinch roller organ face, the shafts C and the shafts B are fixed to a support A, the shafts B are located below the shafts C, one ends of the springs are fixed to the shafts B, and the other ends of the springs and the grooves of the lower portions of the swinging arms are in clamping and elastic pressing cooperation. The organ-shaped pinch roller structure has the advantages that in the manufacturing process of continuous fiber winding plastic composite pressure pipes, organ keys of the organ-shaped pinch roller structure can press and stick the plastic layers whether a fused plastic belt is even or not, and thus the plastic belt and a fiber belt pre-impregnated with resin are fused and effectivelyadhere to each other.

The invention discloses a water injection pressurization device of a water pipe of mechanical and electrical installation and a production method of the water injection pressurization device. The water injection pressurization device comprises a base, wherein the base is arranged horizontally; a pressure rod is arranged above the base; a support rod, a pressure pipe and a piston pipe are arrangedbetween the pressure rod and the base; a sealing joint is arranged at the upper end of the pressure pipe; a sealing block sheet is arranged at the bottom end of an inner cavity of the pressure pipe; the piston pipe penetrates through the sealing joint and is arranged in the inner cavity of the pressure pipe; a sealing gasket is arranged at the lower end of the piston pipe; the sealing gasket, thesealing block sheet and the inner cavity of the pressure pipe form an enclosed hydraulic chamber; and a water inlet connector and a water out connector are arranged on a side wall of the lower end ofthe pressure pipe and communicated with the enclosed hydraulic chamber. According to the device, the sealing joint, the sealing gasket and the sealing block sheet form double-layer sealing to increasedwell pressure; and the device is reasonable in structure size, convenient to use and high in pressurization speed and has low possibility of damage.