1772results about "Siphons" patented technology

The push-to-connect fitting includes a connector body, a sealing member, a grab ring, a cartridge, a retainer sleeve, a plurality of latches, and an interference portion. The sealing member is configured to form a sealing engagement with a fluid conduit. The grab ring includes a plurality of teeth configured for coupling to the fluid conduit. The retainer sleeve is received over at least part of the cartridge and is received over at least part of the connector body. The plurality of latches are located on the retainer sleeve and are configured to secure the retainer sleeve to the connector body to facilitate retention of the sealing member, the grab ring, and the cartridge. The interference portion is configured to engage the retainer sleeve to substantially prevent rotation of the retainer sleeve relative to the connector body.

A fluid connection for a hydromotive machine or fluid-control valve having a first duct and a second duct. The first duct includes a mid-portion between a first end of the first duct and a second end of the first duct that has a non-circular cross-section. A second end of the first duct is wholly within the second end of the second duct. A first end of the second duct is wholly outside of the first duct.

The utility model provides a valve capable of reducing scouring and wear of a valve plate, comprising: a valve body, a buffer mechanism, a secondary filter screen and a primary filter plate, wherein a valve body is arranged in the middle position of the valve body, and compared with the prior art, the utility model has the following beneficial effects: by adding a valve body and a buffer mechanism, a group of buffer mechanisms are arranged between a water source and the valve body, and are fixed by bolts, the buffer mechanism has a built-in buffer ridge 2 and a variable diameter conducting member, which can reduce the speed of the water flow, and two groups of buffer ridges 1 are arranged at the bending part of the conducting groove on the inner side of the left end of the valve body, which can reduce the flow rate of the water flow again before the water flow contacts the valve plate, thereby achieving the effect of reducing scouring and wear of the valve plate, and by adding a valve body, a buffer mechanism, a secondary filter screen and a primary filter plate, the primary filter plate is installed to the inner side of the second connecting flange at the left end, and the secondary filter screen is installed to the inner side of the second connecting flange at the right end, thereby filtering out debris.

The invention relates to the technical field of pipeline installation, and particularly discloses a super high-rise high-pressure pipeline installation structure which comprises a high-pressure pipe set, the high-pressure pipe set is composed of a right-angle bent pipe and two straight pipes connected with the two ends of the right-angle bent pipe respectively, and annular flanges are arranged on the outer sides of the joints of the right-angle bent pipe and the straight pipes. Sealing connecting parts used for connecting the connecting position of the right-angle bent pipe and the straight pipe and conducting multi-stage sealing on the connecting position are arranged at the connecting position of the right-angle bent pipe and the straight pipe, and a triangular reinforcing part used for conducting triangular reinforcing, locking and fixing on the two sealing connecting parts is arranged between the two sealing connecting parts. Different from a traditional mode that only a single sealing ring is arranged in a sleeved mode, a tight multi-stage sealing system is constructed by arranging the sealing connecting part and the triangular reinforcing part in a matched mode, when a high-pressure pipe set is connected, the first sealing ring fills a gap in the connecting position of the straight pipe and the right-angle bent pipe, primary sealing is achieved, and leakage of a high-pressure medium is effectively blocked.

The invention discloses a pipe fitting connecting elbow with a self-locking structure, and belongs to the technical field of pipe fitting connection.The pipe fitting connecting elbow with the self-locking structure comprises an elbow body connected with a first connecting pipeline and a second connecting pipeline, and the two ends of the elbow body are fixedly connected with a first elbow flange and a second elbow flange respectively; a first sealing groove is formed between the first elbow flange and the first connecting pipeline, a first sealing ring is installed in the first sealing groove, a second sealing groove is formed between the second elbow flange and the second connecting pipeline, and a second sealing ring is installed in the second sealing groove. By designing a self-locking structure, self-locking fixation and hole alignment of an elbow flange and a to-be-connected pipeline flange can be rapidly and accurately completed, after self-locking is completed, pre-fixation of an elbow and a to-be-connected pipeline can be achieved, at the moment, a plurality of sets of fixing bolts are used for fastening a flange piece, operation is easy and convenient, and meanwhile the assembling efficiency is greatly improved.

The utility model discloses a glass fiber reinforced plastic pipeline support which comprises a first clamping hoop assembly and a second clamping hoop assembly, the first clamping hoop assembly and the second clamping hoop assembly are clamped on a pipeline in a spaced mode, the first clamping hoop assembly is fixedly arranged on first profile steel, and the second clamping hoop assembly is fixedly arranged on second profile steel so as to fix the pipeline. A first arc-shaped protective tile and a second arc-shaped protective tile are arranged on the two sides of the first clamp assembly correspondingly and adhere to the pipeline so as to fix the first clamp assembly, and a third arc-shaped protective tile and a fourth arc-shaped protective tile are arranged on the two sides of the second clamp assembly correspondingly and adhere to the pipeline so as to fix the second clamp assembly. And the third arc-shaped protective tile and the fourth arc-shaped protective tile are adhered to the pipeline so as to fix the second clamp assembly. The glass fiber reinforced plastic pipeline support is stable in pipeline connection and convenient to disassemble and assemble, operation efficiency is improved, safety of a pipeline system is guaranteed, and the problem of stress of a glass fiber reinforced plastic pipeline of an offshore oil platform under the action of water attack is effectively solved.

A conduit coupling includes a first connector at a first end of the conduit coupling, a second connector at a second end of the conduit coupling, and a stem between the first connector and the second connector. A first end of the stem is attached to the first connector. A second end of the stem is attached to the second connector. The stem is bent at a particular bend angle along a bend plane. The first connector includes an indicator that indicates an orientation of the bend plane.

The utility model relates to the technical field of pipeline systems, in particular to a pipeline heat treatment device which comprises a cylindrical heater, the heater comprises two detachable semicircular cylinders which are symmetrically arranged, and heating wires are arranged on the semicircular cylinders; the heater is a straight cylinder or a bent cylinder which is the same as the heated pipeline section in shape, and the length of the heater is slightly larger than that of the heated pipeline section; sealing plates are arranged at the two ends of the semicircular cylinder, and semicircular through holes allowing pipelines to pass through are formed in the sealing plates; when the pipeline heat treatment device heats the pipeline, heating is more uniform, and the heating effect is better.

The invention discloses a piping assembly and heating and ventilation equipment. The piping assembly comprises a first piping and a second piping, the first piping is constructed to be a transmission pipe on a refrigerant circulation loop, and the second piping is constructed to be an inlet connecting pipe or an outlet connecting pipe of a refrigerant container on the refrigerant circulation loop; the first piping comprises a first piping main body and a first connecting part which are connected together, the second piping comprises a second piping main body and a second connecting part which are connected together, and the first connecting part and the second connecting part are connected together; wherein the first piping main body is made of stainless steel, at least part of the first connecting part is made of copper or copper alloy, the second piping main body is made of steel, and the connecting part of the second connecting part and the first connecting part is made of copper or copper alloy. The piping assembly is low in welding difficulty.

The utility model relates to an anti-blocking bent pipe assembly which comprises a bent pipe body and a push plate. Wherein a through hole is formed in the side wall of the elbow main body; the push plate is attached to the inner wall, provided with the through opening, of the elbow main body, a push rod is fixedly arranged on the side, close to the through opening, of the push plate, and the side, away from the push plate, of the push rod penetrates through the through opening; a plurality of through holes are formed in the push plate; a plurality of protruding blocks are fixedly arranged on the side, away from the through opening, of the push plate. The push rod drives the push plate to be close to or away from the through opening. In conclusion, according to the anti-blocking bent pipe assembly, material cakes in the bent pipe body are effectively removed, meanwhile, retention and blocking of material powder are effectively prevented, and the working stability and production efficiency of a spray drying and collecting system of the lithium battery positive electrode material are greatly improved; and a powerful technical support is provided for continuous production and quality control of the lithium battery positive electrode material.

A ground source heat pump pipeline connecting device belongs to the field of pipeline connecting devices and comprises a double-U connector body, the upper end of the double-U connector body is a cylinder, the lower end of the double-U connector body is a cone frustum, two sets of U-shaped grooves are formed in the double-U connector body, one end of each U-shaped groove is fixedly communicated with a liquid inlet pipe, and the other end of each U-shaped groove is fixedly communicated with a liquid outlet pipe. A ventilation through hole is formed in the middle of the double-U connector body, a vertical shaft is movably arranged in the ventilation through hole and rotationally installed on the double-U connector body, and spiral blades are fixedly installed on the periphery of the vertical shaft. The double-U connector is simple in structure and ingenious in conception, the ventilation through hole can be continuously cleaned through thrust of the push rod on the double-U connector body, so that the ventilation through hole keeps the pressure discharging function, the market requirement can be met, and the double-U connector is suitable for popularization.

The invention relates to a quick connector (1) for connecting fluid lines in battery thermal management systems, comprising a connecting body (10) which has a straight inlet section (2) for connecting to a main inlet line of the thermal management system in a fluid-communicating manner, and a straight outlet section (4), arranged substantially perpendicularly to said inlet section, for connecting to a heat exchanger line of a battery in a fluid-communicating manner, wherein the connecting body (10) surrounds a fluid channel (5) and has a deflecting section (3) arranged between the inlet and outlet sections (2, 4) for deflecting an inlet flow, characterised in that a fluid channel diameter (D) of the inlet and deflecting sections (2, 3) corresponds to a diameter of the main inlet line and is larger than a fluid channel diameter (d) of the outlet section (4), wherein a diameter transition (7) of the fluid channel (5) is arranged downstream of the deflecting section (3) in the region of the outlet section (4).

The invention provides a shared bolt pipe fitting which comprises a pipe fitting body, and at least one pair of positioning parts are arranged on the outer side of each communicating end. The clamp assembly comprises at least two pairs of clamp pieces, the two ends of each clamp piece are provided with installation bases used for installing bolts, the inner side of each clamp piece is provided with at least one positioning groove, and on every two adjacent pairs of clamp pieces, at least parts of every two adjacent installation bases are overlapped with each other and share the same bolt. The positioning part and the positioning groove are arranged between the end part of the pipe fitting main body and the inner side of the clamp piece, and the overlapping part of the shared bolt is arranged between the two adjacent communicating end parts, so that the communicating end parts of the clamp piece are quickly positioned and mounted, the deformation of the clamp piece in the mounting process is controlled to a certain extent, and the mounting efficiency is improved. Therefore, the connecting stability between the communicating end of the pipe fitting body and other pipeline openings is guaranteed, and the situation that media in a pipeline leak at the connecting position is avoided.

The invention relates to the technical field of pipeline noise elimination, in particular to a pipeline elbow noise reduction device which comprises a connecting elbow, an inner silencer is embedded in a bend of an inner cavity of the connecting elbow, a cavity exists between the inner silencer and the inner wall of the connecting elbow, and a neck bush is arranged between the inner silencer and the inner cavity of the connecting elbow. The inner silencer comprises an inflow part, an inward shrinkage part, a flow guide part and a discharge part which are integrally formed through flexible rubber, the inner diameters of the inflow part, the inward shrinkage part, the flow guide part and the discharge part are smoothly and gradually changed in the flow direction, and the outer wall of the inner silencer and the inner wall of the neck bush are seamlessly attached together. The silencer has the beneficial effects that the gradual change section design of the inner silencer maintains a laminar flow boundary layer through continuous curvature change, and flow separation is effectively reduced; the spiral flow guide fins are used for disassembling macroscopic vortex into micro-scale turbulent flow, so that energy dissipation is accelerated, and medium-high frequency noise is improved in a targeted manner; the sound absorption part is filled with an efficient sound absorption material, and a complementary silencing mechanism is formed with flow field optimization.

The utility model discloses a building water supply and drainage pipeline which comprises a first pipeline and a second pipeline, the first pipeline and the second pipeline are connected through a connecting bent pipe, and a filtering mechanism and a cleaning mechanism are sequentially arranged in the connecting bent pipe downwards along the height of the connecting bent pipe. The filtering mechanism comprises a secondary filtering shell, a flow guide pipe, a primary filtering shell and a conical filtering cylinder; the cleaning mechanism comprises a rotating shaft, a transmission shaft, a group of inclined rods, a group of scraping plates and a plurality of spiral blades. The device has the beneficial effects that the conical filter cartridge firstly filters impurities in water in the connecting elbow, the secondary filter shell is matched for secondary filter treatment, the rotating handle is manually rotated to drive the group of scrapers to clean the impurities on the surface of the conical filter cartridge, and meanwhile, the rotating shaft drives the plurality of spiral blades to rotate, so that the impurities on the surface of the conical filter cartridge can be cleaned. The bottom of the connecting bent pipe can be prevented from being blocked, and a user can regularly clean sundries collected in the secondary filtering shell through a cleaning opening, so that the secondary filtering device is convenient to use.

The invention relates to the technical field of compressed air energy storage, and discloses a compressed air energy storage test hole which comprises a bent pipe and straight pipes, the two ends of the bent pipe are connected with the straight pipes through pipe clamp assemblies, and the pipe clamp assemblies are connected with hoisting assemblies. The pipe clamp assembly is lifted through the lifting assembly, then the V-shaped block on the rotating rod can fall into the V-shaped groove, the moving direction of the straight pipe can be concrete through the position of the V-shaped block on the V-shaped groove until the V-shaped block slides to the position completely matched with the V-shaped groove, and it is indicated that the axes of the bent pipe and the straight pipe completely coincide; in this way, the bent pipe and the straight pipe can be conveniently aligned, then the pipe clamp assembly on the bent pipe and the pipe clamp assembly on the straight pipe are connected through the fixing rod, half of the weld joint of the bent pipe and the straight pipe is not blocked all the time, and at the moment, the exposed weld joint can be manually welded.

The utility model discloses a bent pipe type quick-change connector which comprises a connector body and a pressing ring at the top of the connector body, and a limiting assembly used for limiting movement of the pressing ring is arranged at the top of the connector body. The limiting assembly comprises a rotating ring arranged at the top end of the pressing ring, and the top of the connector is sleeved with a positioning ring. Through the design of the rotating ring, the positioning rod, the positioning ring, the penetrating hole, the connecting assembly and the positioning assembly, when a pipeline and a connector need to be fixed, the positioning rod and the rotating ring cannot move towards one side of the connector through blocking of the positioning ring, and when a pressing ring needs to be pressed towards one side of the connector, the pressing ring can move towards the other side of the connector. The rotating ring drives the positioning rod to move to be aligned with the penetrating hole, and the positioning rod at the bottom of the rotating ring penetrates through the penetrating hole while the pressing ring and the rotating ring are pressed, so that the pressing ring can move towards one side of the connector, movement of the pressing ring is limited through the design, and it is ensured that the connector and the pipeline cannot be separated during use.

The utility model relates to the technical field of all-air air-conditioning systems, in particular to a novel all-air air-conditioning transmission and distribution pipeline system which comprises a variable-diameter pipeline joint connected with an air outlet of a unit, one end of the variable-diameter pipeline joint is connected with a first rectangular straight pipe, one end of the first rectangular straight pipe is connected with a transition assembly used for penetrating through a wall or a lintel, and the other end of the first rectangular straight pipe is connected with a second rectangular straight pipe. The transition assembly is connected to one end of a second rectangular straight pipe, the other end of the second rectangular straight pipe is connected with one end of a third rectangular straight pipe through a rectangular straight joint, and the other end of the third rectangular straight pipe is connected with a rectangular elbow. According to the novel all-air air conditioner transmission and distribution pipeline system, the purpose of reducing the pipe diameter can be achieved through connection among the square-to-round straight joint, the round straight pipe and the round-to-square elbow, damage of system construction to a building main body structure is reduced, construction accidents are avoided, and the construction efficiency is improved. And it can be guaranteed that air passing through the pipeline can carry enough cold and heat quantity and fresh air demand quantity, and it can be guaranteed that the cold and heat quantity value conveyed to each room is balanced.

The quick-change connector convenient to disassemble comprises an elbow joint, a quick-change head is arranged at one end of the elbow joint, a hexagonal ring is arranged on the outer side of the other end of the elbow joint in a sleeved mode, a power assisting component is arranged on the edge side of the top of the hexagonal ring and comprises a fixing clamping groove formed in the top of the hexagonal ring, and a telescopic part is arranged in an inner cavity of the fixing clamping groove. Fixed parts are symmetrically arranged on the outer side of the fixed clamping groove, and each telescopic part comprises a sleeve and a movable rod; according to the utility model, the top of the hexagonal ring of the elbow joint is provided with the power-assisted component for assisting the elbow joint in rotating and fixing, so that an operator can unfold the elbow joint by utilizing the telescopic part hinged with the inner cavity of the fixed clamping groove in the power-assisted component, and rotate the elbow joint by utilizing the sleeve and the movable rod in the telescopic part; and the telescopic part is limited by the fixing part arranged on the outer side of the fixing clamping groove, and by means of the design, installation personnel can conveniently rotate and disassemble the elbow joint when the outer side of the hexagonal ring is damaged due to thread slipping and cannot be disassembled through a wrench.

An irrigation fitting comprises a first fitting branch and a second fitting branch. The first fitting branch comprises a first planar region and a second planar region. The second fitting branch comprises a third planar region and a fourth planar region. The first planar region and the third planar region jointly comprise a first curved concave edge and a second curved concave edge. The second planar region and the fourth planar region jointly comprise a third curved concave edge and a fourth curved concave edge.

The utility model provides a leakproof automobile oil pipe joint, which belongs to the technical field of automobile oil pipe joints and comprises an oil inlet elbow, a connector and an oil outlet pipe, external threads are arranged at the right end of the outer surface of the oil inlet elbow and the left end of the outer surface of the oil outlet pipe, and internal threads are arranged on the left side and the right side of the interior of the connector. The oil inlet elbow and the oil outlet pipe are respectively in threaded connection with the left and right sides of the connector; by arranging the sealing rings, when the oil inlet elbow is connected with the oil outlet pipe, the two sealing rings are embedded into the left end and the right end of the interior of the connector respectively, and the sealing rings are fixedly arranged on the left side and the right side of the interior of the connector through fixing glue; and then the oil inlet elbow and the oil outlet pipe are in threaded connection with the internal threads on the left side and the right side of the connector through the external threads correspondingly, the oil inlet elbow and the oil outlet pipe abut against the sealing rings correspondingly, the sealing effect is achieved, the sealing performance of the connecting position is guaranteed, and the oil leakage preventing effect is achieved.

The utility model provides a prefabricated overhead steam heat preservation elbow which is characterized in that a plurality of heat preservation layers are arranged outside an elbow steel pipe body, and the plurality of heat preservation layers are sequentially composed of an inner heat preservation layer, an inner isolation layer, a soft and hard double-material composite heat preservation layer, an outer heat preservation layer, an outer isolation layer and an outer protection layer from inside to outside; the soft and hard double-material composite heat preservation layer is composed of hard heat preservation materials and soft heat preservation materials, the hard heat preservation materials and the soft heat preservation materials are sequentially arranged in the axial direction of the elbow steel pipe body in a staggered mode, the hard heat preservation materials are shrimp joint elbows made of calcium silicate tiles, and the soft heat preservation materials are aluminum silicate, glass wool and nanometer aerogel felt which are filled between the adjacent hard heat preservation materials. In the axial direction of the elbow steel pipe body, the hard heat preservation materials and the soft heat preservation materials are sequentially arranged in a staggered mode, the design can effectively prevent the heat preservation layer from falling, deforming and shifting caused by pipeline expansion in the operation process, the overall strength and stability of the heat preservation layer are improved, and damage to the heat preservation layer caused by external collision is reduced.

The preparation method comprises the following steps that an interface layer is prepared, specifically, under the vacuum condition, a carbon source and a nitrogen source are provided, and carbon-nitrogen co-permeation treatment is conducted on the surface of an elbow base body through high-energy plasma to form a carbon-nitrogen co-permeation layer serving as the interface layer; preparing a barrier layer: depositing on the surface of the carbonitriding layer through a chemical vapor deposition method to form a metal oxide layer as the barrier layer; and preparing a corrosion-resistant layer: depositing on the surface of the metal oxide layer through a chemical vapor deposition method to form a silicon carbide layer as the corrosion-resistant layer. The protective composite coating composed of the interface layer formed by the carbon-nitrogen co-permeation layer, the barrier layer formed by the metal oxide layer and the corrosion-resistant layer is combined to the surface of the elbow base body, so that the metal elbow has the low average erosion rate and average wear rate, and the safety and reliability of an oil and gas field gathering and transportation system can be remarkably improved.

The invention discloses a hoop elbow convenient to install, and relates to the technical field of hoop fixing and installing, the hoop elbow comprises an elbow part, a connecting pipe, an upper hoop and a lower hoop, a sealing block is installed between the elbow part and the connecting pipe, a first clamping groove is formed in the outer side of one end of the elbow part, and a second clamping groove is formed in the outer side of one side of the connecting pipe; the connecting plates are symmetrically arranged on the two sides of the upper clamping hoop, the connecting plates are fixedly connected with the upper clamping hoop, and the interiors of the connecting plates are connected with plug pins in a sliding mode; the transverse plates are fixedly connected with the upper portions of the two ends of the lower clamping hoop, the bottom plates are installed below the transverse plates, the bottom plates are fixedly connected with the lower clamping hoop, and the two bottom plates are symmetrically arranged; and the upper groove is formed in one side of the interior of the transverse plate, so that the problems that an existing clamp is generally fixed through a bolt and needs to be screwed for multiple times during mounting and dismounting, and when a large batch of clamps are mounted or dismounted, the efficiency of mounting and follow-up dismounting and maintenance is not high are solved.

The utility model discloses a silicon nitride ceramic lining elbow which comprises an elbow body, a silicon nitride ceramic inner pipe is fixedly embedded in the inner wall of the elbow body, two blocking rings are fixedly connected to the inner wall of the elbow body, and the two ends of the silicon nitride ceramic inner pipe are fixedly connected with the side faces, close to the silicon nitride ceramic inner pipe, of the two blocking rings respectively. Three annular limiting grooves are formed in the inner wall of the bent pipe body, and the inner wall of each annular limiting groove is fixedly connected with a positioning ring. According to the device, through the arrangement of the bent pipe body, the silicon nitride ceramic inner pipe, the annular limiting groove, the positioning ring and the plugging ring, the silicon nitride ceramic inner pipe can be effectively fixed and limited, the silicon nitride ceramic inner pipe is more stably installed in the bent pipe body, stable use of the elbow is facilitated, and through the cooperation of the arranged material guiding slope plate and the plugging ring, the material guiding slope plate is more stable. And the end of the silicon nitride ceramic inner pipe can be protected, the impact force borne by the silicon nitride ceramic inner pipe is reduced, and the elbow can be stably used for a long time.

The embodiment of the invention provides a battery and electric equipment, the battery comprises a mounting part and a flange structure, the mounting part is provided with a mounting hole, the flange structure comprises a first connecting part, a first sealing element and a second sealing element, the first connecting part is movably arranged in the mounting hole, the first sealing element sleeves the periphery of the first connecting part, and the second sealing element sleeves the periphery of the second connecting part. The first sealing part is connected with the mounting part, the second sealing part is arranged on the periphery of the first connecting part in a sleeving mode, and the second sealing part is matched with the first sealing part to enhance the sealing effect between the first sealing part and the first connecting part. The electric equipment comprises a battery.

The utility model discloses a rotational flow dirt-resisting noise-reducing variable-diameter elbow and a building drainage system, the rotational flow dirt-resisting noise-reducing variable-diameter elbow comprises a water inlet elbow structure and a water outlet elbow structure, the water inlet elbow structure and the water outlet elbow structure form an internal channel for water circulation, and a guide vane carrier is arranged in the internal channel. The guide vane carrier is provided with a spiral rotational flow guide vane capable of rotating relative to the internal channel; when water enters the water inlet end, water flow enters the inner channel through the water inlet elbow structure and flows to the water outlet elbow structure in the rotating direction of the rotational flow guide piece so as to be discharged to the water outlet end. According to the rotational-flow dirt-resisting and noise-reducing variable-diameter elbow, the rotational-flow guide pieces are arranged in the inner channel, so that water flow is effectively guided to flow in the spiral direction, direct impact of the water flow on the pipe wall is reduced, noise and vibration are reduced, and the problems that in the prior art, water flow impact sound is large, noise is high, vibration is obvious, and pipe fittings are prone to being damaged are solved; the service life of the pipe fitting and the operation stability of the drainage system are obviously improved.

A dual containment pipe assembly includes an outer containment pipe defining a rib on an interior surface thereof. An inner containment pipe can be positioned inside of the outer containment pipe. The inner containment pipe has at least one clip on an exterior surface thereof. At least one spacer wheel is between the outer containment pipe and the inner containment pipe. The spacer wheel has an inner channel for engagement to the clip and an outer groove for engagement to the rib. The spacer wheel includes: an inner circumferential hub defining the inner channel for engaging the clip; an outer circumferential rim defining the outer groove for engaging the rib; and a plurality of support spokes connecting the inner circumferential hub and the outer circumferential rim.

The invention relates to the technical field of pipeline connecting structures, in particular to a pipeline connecting pipe fitting which comprises a first straight pipe section body, a bearing section body and at least one second straight pipe section body which are integrally cast, and the bearing section body is provided with a turning part which is bent or inclined from the axial direction of the pipe fitting to the radial direction. A corrosion buffer piece extending in the direction away from the bearing section body is integrally arranged in the middle of the outer wall of the turning part, a fixing through hole is formed in the corrosion buffer piece, and the fixing through hole is formed in the end, away from the bearing section body, of the corrosion buffer piece, so that a corrosion buffer area is formed between the fixing through hole and the outer wall of the turning part; the inner walls and the outer walls of the first straight pipe section body, the bearing section body and the second straight pipe section body are all covered with corrosion-resistant layers. The connecting pipe fitting has the beneficial effects that the corrosion buffer sheet is arranged outside the connecting pipe fitting, and even if an easily-corroded point of the connecting pipe fitting is corroded in the long-term use process, generated corrosion products cannot fall off and be mixed into a conveyed water body, so that water pollution is avoided.

The utility model discloses a shale gas elbow manual desilting mechanism which comprises a branch pipe connected to an elbow, the branch pipe and the two ends of the elbow form a three-way pipe, and a blind plate is arranged at the end of the branch pipe. The branch pipe is additionally arranged at the elbow to form the three-way pipe, then the right end of the branch pipe is plugged through the blind plate, the curved plate is arranged in the three-way pipe to keep a pipeline through which shale gas passes to be in an elbow shape, the flowing state of the shale gas is not changed, the curved plate is impacted by sand, and the curved plate can be conveniently taken out to be replaced after being damaged; and if the sand is accumulated at the elbow to cause blockage, the sand in the elbow can be manually cleaned up by detaching the blind plate and the curved plate.