2271 results about "Bellows" patented technology

A breakaway valve for a cryogenic fluid tank includes a tank-side valve and a nozzle-side valve. The tank-side valve is connected to and forms a first vacuum-insulation layer with a first jacketed hose. The first jacket support includes first bellows configured to reduce heat transfer with the first vacuum-insulation layer and one or more first bellow supports that include first teeth inserted between and engaging the first bellows to provide structural support to the first bellows. The nozzle-side valve is connected to and forms a second vacuum-insulation layer with a second jacketed hose. The second jacket support includes second bellows configured to reduce heat transfer with the second vacuum-insulation layer and one or more second bellow supports that include second teeth inserted between and engaging the second bellows to provide structural support to the second bellows.

The application discloses a multi-model adaptive low-temperature valve sealing performance testing device and method, and belongs to the technical field of valve detection. The device comprises: a first upper end cover of a low-temperature thermostat, wherein a to-be-tested low-temperature valve is installed on the first upper end cover through a valve support device; the valve support device is in flexible sealing cooperation with a bellows through an adjusting screw, so that the installation height and centering of the to-be-tested low-temperature valve are controlled, and low-temperature valves of different specifications are adapted; the low-temperature thermostat surrounds a first cold screen and a second cold screen; the bottom of the to-be-tested low-temperature valve is connected with one end of a cold-lead bridge through a pipe clamp and is surrounded by the first cold screen; a GM refrigerating machine comprises two-stage cold heads arranged in the low-temperature thermostat; the second cold screen surrounds the two-stage cold heads; the other end of the cold-lead bridge is connected with the two-stage cold heads; three helium supply devices are connected with the inlet and outlet of the to-be-tested low-temperature valve and the low-temperature thermostat respectively; and a vacuum pump unit is connected with the low-temperature thermostat. The application realizes rapid adaptation and accurate testing of low-temperature valves of multiple models.

The invention belongs to the technical field of dust falling devices, and particularly relates to an intelligent spraying dust falling device for building construction, which comprises a fence, a fixed plate and the like, a fixing plate is connected to the fence. The fixing plates are locked on the fence through the pin rods, every two adjacent water pipes are communicated through the corrugated pipes, water is conveyed into the water pipes, then the water flows into the corresponding guide pipes I along the water pipes and is finally sprayed out from the corresponding spray heads, and therefore spraying dust falling on a construction site is achieved; therefore, pipelines do not need to be additionally laid on the fences, the laying efficiency of the fences can be greatly improved, dust falling can be achieved, spraying dust falling can be conducted on dust drifting above the fences through the spray heads with upward openings, spraying dust falling can be conducted on dust drifting on the inner sides of the fences through the spray heads with downward openings, and the dust falling efficiency of the fences is improved. And therefore, the two spray heads on the same guide pipe I can perform spraying and dust falling on different areas.

The invention belongs to the technical field related to medical robots, and discloses a rigid-flexible coupling pneumatic humanoid dexterous finger and a dexterous hand. The dexterous finger comprises a sectional corrugated pipe actuator, a rigid cover plate, a rigid bottom plate, a flexible finger pulp patch and a one-way stretchable fabric; a cooperative structure of rigid supporting, flexible driving and contact adaptation is formed through a preset assembly relation; by designing the wave number of the corrugated pipe at each joint of the pneumatic dexterous finger, the bending proportion of each joint is ensured to accord with the human hand movement rule; the one-way stretchable fabric can restrain ineffective upheaval at the joints, and the energy conversion efficiency is improved. The dexterous hand can integrate five anthropomorphic-size dexterous fingers, and the palm notch angle, the thumb turning direction angle and the flexible palm patch are all engraved with the physiological characteristics and structure of the hand of the human body. According to the pneumatic dexterous hand, personification of the pneumatic dexterous hand in appearance and movement modes is achieved, flexibility and bearing stability are both considered, and the pneumatic dexterous hand can meet the requirements of multiple scenes such as medical care and industrial assembly.

The present application relates to the technical field of corrugated pipe processing, and particularly relates to a corrugated pipe cutting machine tool, which comprises a rack, a feeding conveying assembly and a discharging conveying assembly; further comprises a portal, a cutting mechanism, a clamping assembly and a distance adjusting mechanism, the portal is installed between the feeding conveying assembly and the discharging conveying assembly, the cutting mechanism is installed on the portal, the cutting mechanism is used for cutting the corrugated pipe between the feeding conveying assembly and the discharging conveying assembly, the clamping assembly is installed at the middle part of the rack, the clamping assembly is used for clamping the corrugated pipe, and the clamping assembly is located on the front and back sides of the cutting mechanism, the distance adjusting mechanism is movably installed at the rear part of the rack, and the distance adjusting mechanism is used for adjusting the corrugated pitch of the corrugated pipe on the discharging conveying assembly, so that the corrugated pitch of the corrugated pipe reaches the design value; the corrugated pipe is cut after the elongation or compression state of the corrugated pipe is eliminated, the size deviation of the cut corrugated pipe is reduced, and the cutting precision is improved.

The utility model discloses a treatment device for preparing biomass energy from forestry and agricultural residues, and relates to the technical field of biomass energy preparation, the treatment device comprises a bottom plate and a drying box, the drying box is arranged above the bottom plate, and a plurality of fixing pipes are distributed on the upper surface of the bottom plate in a rectangular array mode; a movable rod is movably sleeved with the fixed rod, the upper end of the movable rod is fixedly connected with the drying box, a hollow plate is arranged on one side of the interior of the drying box, a plurality of nozzles are fixedly arranged on one side of the hollow plate, a transverse pipe is arranged on the other side of the hollow plate in a communicating mode, and one end of the transverse pipe extends out of the drying box. And an air heater is fixedly arranged on one side of the upper surface of the bottom plate, an air outlet of the air heater is fixedly connected with a corrugated pipe, and the upper end of the corrugated pipe communicates with the transverse pipe. According to the biomass energy drying device, prepared biomass energy can be raised and air-dried, and the drying efficiency of the biomass energy can be greatly improved.

A control unit 6 of a bellows pump device 1 determines whether or not a second bellows 14 (first bellows 13) is in a predetermined expanded state when the first bellows 13 (second bellows 14) contracts to a mid-contraction state, on the basis of respective detection signals of a first detection unit 29 and a second detection unit 31, and when a determination result of the determination is negative, the control unit 6 performs next pressure increase control of controlling a second electropneumatic regulator 52 (first electropneumatic regulator 51) such that an air pressure of a pressurized air to be supplied to a second suction-side air chamber 26B (first suction-side air chamber 26A) of a second driving unit 28 (first driving unit 27) at next expansion of the second bellows 14 (first bellows 13) is increased.

The invention provides a miniature corrugated pipe machining technology and application, a miniature corrugated pipe is formed based on metal material machining, the miniature corrugated pipe is provided with a main body part, a plurality of extension parts are formed at one end of the main body part, and the extension parts are symmetrically arranged according to the axis of the main body part. According to the method, a metal material is machined into a designed shape through machining, then a thin metal coating is formed on the periphery of the metal material through an electrochemical process, useful parts are cut off through machining, and finally, original metal in the middle of the useful parts is thoroughly corroded through the electrochemical process, so that a final finished product is obtained. The miniature corrugated pipe is easy to install, use, replace and discover abnormities, and the installation space is small.

A flexible waveguide device, of the bellows type, for guiding a radio frequency signal at a given frequency range. The device includes: a core including outer and inner side walls, the inner walls delimiting a waveguide channel; two fixing flanges connected to or integral with respective ends of the core, and at least one flexible corrugated portion formed on a part of the outer side walls of the core and including a plurality of circumferential ribs adjacent to each other. Each rib is devoid of corrugation along its circumference. Also, a method of manufacturing the flexible waveguide device.

The invention relates to a tensile insulating flame-retardant cable in the field of cables, which comprises a plurality of sections of flame-retardant protective layers, four wire cores which are circumferentially distributed are arranged among the plurality of sections of flame-retardant protective layers in a penetrating manner, and inner supporting strips are arranged in the middles of the four wire cores in the flame-retardant protective layers in a penetrating manner; two adjacent sections of flame-retardant protective layers are respectively provided with a straight sheath and an insulating corrugated pipe on a straight laying path and a bent laying path; a hollow partition strip is clamped between two adjacent wire cores in the flame-retardant protective layer, and the inner support strip is attached to the plurality of hollow partition strips; wiring clamping plugs are clamped to the two ends of the hollow partition strip, and a monitoring line electrically connected with the two wiring clamping plugs is arranged in the hollow partition strip in a penetrating mode. A plurality of uniformly distributed detection units are arranged on the monitoring line, each detection unit comprises a pair of thermocouples, and a flame-retardant unit is clamped between the pair of thermocouples; the high tensile strength and flame retardant property of the cable are realized, the cable can be conveniently installed on different laying paths, and the monitoring line can be conveniently overhauled.

An insect netting for a greenhouse includes a front panel merging into two side panels. The insect netting is pleated having bellows sections. Each bellows section has two parallel side bellows portions and a front bellows portion. Each side bellows portion comprises a first side gauze web and a second side gauze web connected to each other at a longitudinal side thereof, each having a first short side and a second short side. Each of the front bellows portions comprises a first front gauze web and a second front gauze web connected to each other along a longitudinal side thereof. The second short side of the first and second side gauze webs of the side bellows portions is connected to the longitudinal side of the first and second front gauze webs facing towards the hinging axis of the ventilation panel, respectively.

The invention relates to a corrugated hose (200) for use in semiconductor technology equipment, and to a semiconductor technology equipment comprising a corresponding corrugated hose (200). The corrugated hose (200) comprises a flexibly deformable bellows (210) made of rigid, gas-tight material with a wave-like alternating diameter, forming the outer surface of the corrugated hose (200), and an inner hose (220) made of flexible material, forming the flow channel for a liquid, wherein the bellows (210) and the hose (220) are connected to each other at the two ends of the corrugated hose (200) in such a way that a continuous gas volume (240) is formed between the bellows (210) and the hose (220), and the corrugated hose (200) is designed to reduce temperature differences between the bellows (210) and the hose (220). The system for semiconductor technology comprises a temperature control system (100) with at least one fluid line (101), wherein a corrugated hose (200) according to the invention is arranged in at least one fluid line (101).

The utility model relates to a compound hinge corrugated pipe compensator, which comprises a protective sleeve sleeved on the periphery of a corrugated pipe, and is characterized in that the protective sleeve comprises a first shell and a second shell, the first shell and the second shell are sleeved on the periphery of the corrugated pipe, one end of the first shell is connected with an end pipe at one end of the compensator, and the other end of the first shell is connected with an end pipe at the other end of the compensator. The second shell is connected with an end pipe at the other end of the compensator, the other end of the first shell is rotationally connected into the second shell, and the outer side wall of the first shell is attached to the inner side wall of the second shell. Due to the adoption of the technical scheme, when the compound hinge corrugated pipe compensator disclosed by the utility model is used for carrying out angular displacement compensation on a pipeline, soil does not easily reach the space between the concave parts of the corrugated pipe, so that the possibility that the corrugated pipe is difficult to bend normally due to the fact that the soil is propped against the concave parts is reduced to a certain extent.

The invention belongs to the technical field of electronic product cooling, and discloses a corrugated pipe structure which comprises a corrugated pipe, the corrugated pipe comprises at least two metal layers, all the metal layers are sequentially arranged in the radial direction of the corrugated pipe, in every two adjacent metal layers, the metal layer located on the outer layer wraps the outer wall of the metal layer located on the inner layer, and the metal layer located on the outer wall wraps the metal layer located on the inner layer. And one of every two adjacent metal layers is a copper layer, and the other of every two adjacent metal layers is a stainless steel layer, so that the flexibility and the sealing performance of the corrugated pipe can be improved.

This is a trailer with independent half-axle suspension, the supporting structure of which consists of a frame (1), a split central support tube (2), and a chassis (3) with independently suspended running wheels (6). The chassis (3) comprises a front axle (31) with an integrated front transfer case (311) and pivotally mounted portal half-axles (312), and at least one rear axle (32) with an integrated rear transfer case (321) and pivoting rear half-axles (322). The support tube (2) is connected to the frame (1) via cross members (4). The solution consists in the support tube (2) being composed of a two-part front section (21) and rear sections (22) arranged at different heights, with the front section (21) being mounted higher than the rear section (22).and that the rear section (22) of the support tube (2) is provided with at least one intermediate plate (41) for the stepped connection of the axles (31) and (32) with the front section (21) of the support tube (2), which connects the support tube (2) to the front transfer case (311), wherein brake flanges (81) with brake carriers (82) for attaching the brake system of the trailer wheelset are attached at the ends of the half-axles (312) extending laterally from the front transfer case (311), and an independent wheel suspension (7) of the wheels (6) of the chassis (3) is mounted on the half-axles (312), which is attached to the underside of the frame (1) and is based on a bellows air spring (71), and an adjustable, vertically oriented trailer coupling (5) is attached to the end part of the front section (21) of the support tube (2).

The utility model discloses a mine ventilation device which comprises a ventilation box, an air inducing structure is arranged on the inner wall of the ventilation box, a filter frame is arranged on the left side of the ventilation box, a filter screen is fixedly connected to the inner wall of the filter frame, an induced draft fan is arranged on the top of the ventilation box, and an electric lifting assembly is arranged on the inner wall of the ventilation box. A movable frame is bolted to the bottom of the electric lifting assembly, the bottom of the movable frame movably communicates with a reverse blowing mechanism, and a movable frame is arranged at the bottom of the ventilation box, so that the problems that when an existing mine ventilation device is used, most of the existing mine ventilation device lacks an effective foreign matter blocking structure, so that an air inducing component in the ventilation device is easily attached by foreign matter, and the ventilation effect is poor are solved. In addition, the filter screen cleaning mode is single or inconvenient, the filter screen is difficult to quickly clean, the continuity of ventilation work is influenced, and the ventilation effect is reduced.

The utility model relates to the technical field of immersion sealing blowing structures, in particular to a chip component end sealing machine immersion sealing blowing structure which comprises a fixing plate, a fan is arranged on the fixing plate, a conical pipe is arranged at the top end of the fixing plate, a corrugated pipe is arranged at the top end of the conical pipe, and a spray head is arranged at the top end of the corrugated pipe. A rotating rod is arranged on one side of the outer wall of the fixing plate, an overturning rod is fixedly connected to the rotating rod in a sleeving mode, the other end of the overturning rod is fixedly connected with one end of the spray head, a driving assembly is arranged on one side of the outer wall of the fixing plate, and the driving assembly is fixedly connected to the outer wall of the rotating rod in a sleeving mode. According to the immersion sealing and blowing structure of the chip component end capping machine, the problems that the angle of a spray head cannot be adjusted in the actual use process of an end capping machine immersion sealing and blowing structure in the prior art, so that resin for sealing and immersing a port is not uniformly distributed on a component and is uneven are solved.

The utility model discloses a small caliber high pressure bellows safety valve relates to safety valve technical field, solves the failure problem such as small size valve stem bending easily, the valve piece includes the valve piece of the integral constitution and the recoil disc part, and the lower extreme of bellows is connected with the recoil disc part, the top side of valve piece forms the guide column upwards and extends, and the guide hole of guide bushing slides up and down with the guide column, and the top end of guide column extends to the top hole orifice position of guide hole, and the lower spring seat is equipped with below spring, and the bottom of valve rod is abutted with lower spring seat, and the bottom surface of lower spring seat has the first cone body of the downward convex inverted cone, and the top surface of guide column is equipped with the first taper groove of the first cone body adaptation, and the first cone body is formed positioning into the first taper groove. The overall structural strength and rigidity of valve rod system are strengthened, can bear the high load under the high pressure working condition of small caliber, and the length of guide cooperation is prolonged, and the perpendicularity and stability of valve piece in the movement in the opening and closing process are ensured.

This utility model relates to the field of vacuum bellows technology and discloses a vacuum bellows for preventing leakage after collision. It includes a buffer layer and two fixed pipes. Pipe mechanisms are provided on both the left and right sides of the buffer layer for leak prevention. Connecting mechanisms are provided on the opposite sides of the two fixed pipes for connecting the bellows. A protective mechanism is provided on the outside of the buffer layer. The pipe mechanisms include multiple A-layers, which are fixedly connected to each other on the left and right sides of the buffer layer. Two B-layers on the left side are fixedly connected to the right side of the two A-layers. In this utility model, the A-layers are fixed to both sides of the buffer layer, and the B-layers are connected to adjacent A-layers on their left and right sides. The A and B-layers are connected to a protective layer, which contains an internal bellows. A buffer assembly is provided on the outer wall of the buffer layer. The A and B-layers are alternately connected to form a main body that combines flexibility and strength.

The utility model discloses a high-low voltage power distribution cabinet maintenance device which comprises a cabinet body and a cabinet door arranged on the cabinet body, one side wall of the cabinet body is provided with an air inlet, the other side wall is provided with an air outlet, one end of the air inlet is connected with a first air pipe arranged on the inner side wall of the cabinet body, and the other end of the air inlet is connected with a first air box arranged on the outer side wall of the cabinet body. A first filter pipe is arranged in the first air box, the upper end of the first filter pipe is connected with a top plate of the first air box, the lower end of the first filter pipe penetrates through a bottom plate of the first air box and extends to the position below the first air box, one end of the air outlet is connected with a second air pipe arranged on the side wall of the cabinet body, and the other end of the air outlet is connected with a second air box arranged on the outer side wall of the cabinet body. A second filter pipe is arranged in the second bellows, the upper end of the second filter pipe is connected with a top plate of the second bellows, and the lower end of the second filter pipe penetrates through a bottom plate of the second bellows and extends below the second bellows. Dust in the power distribution cabinet can be cleaned and maintained regularly, and the service life of electrical components in the power distribution cabinet is prolonged.

1. The name of the design product: three-way joint (plug buckle corrugated compression type). 2. The use of the design product: three-way buckle joint for seepage and drainage pipe in municipal engineering, water purification plant, sewage plant, sports ground, park and other occasions. 3. The design points of the design product: Y-shaped corrugated shape and the shape of the inner clamping point protrusion at the interface. 4. The picture or photo that best indicates the design points: perspective view 1. 5. The top view and bottom view of the design product are not easy to see during use, so the top view and bottom view are omitted.

The utility model discloses a portable volatile organic compound detector. The portable volatile organic compound detector comprises a detector body and a detection assembly, one end of the detector body is provided with a mounting groove, a groove opening of the mounting groove is provided with a threaded flange, and the threaded flange is provided with a threaded cover; the detection assembly can be accommodated in the mounting groove, and the detection assembly comprises a telescopic rod, a detection head, a corrugated pipe and a spring. During use, the threaded cover is taken down, the elastic force of the spring ejects the detection head and part of the telescopic rod out of the mounting groove, at the moment, a detector applies tension to the telescopic rod to enable the telescopic rod to extend, and the corrugated pipe located in the telescopic rod extends along with the telescopic rod; and then, the detection head can extend into the to-be-detected area for detection, so that the safety of detection personnel is improved. When the portable volatile organic compound detector disclosed by the utility model is not used (or carried), the detection component can be accommodated in the mounting groove, so that the portability of the volatile organic compound detector is effectively improved.

A membrane element for a humidifier, includes a membrane media bellows being zigzag-pleated and comprising a membrane media that is moisture permeable but gas impermeable, the membrane media bellows extending at least partially in a circumferential direction about a longitudinal axis, the membrane media bellows further comprising pleats extending essentially parallel to the longitudinal axis, and the membrane media bellows further comprising inner pleat folds at an inner circumference and outer pleat folds at an outer circumference, a support body comprising a hollow body and an outer wall arranged at the inner circumference of the membrane media bellows, and a bypass valve integrated into the support body, the bypass valve being for selectively blocking and unblocking a fluid passage through the support body.

Vehicle seat including: a first and second inflation bellows (16, 18) arranged in a seat section (12); a first and a second supply line (40, 50) connecting the bellows (16, 18) together; a first valve arrangement (20) which is arranged on the first supply line (40) and can be opened towards the first inflation bellows (16) under pressure from the second inflation bellows (18); and a second valve arrangement (30) which is arranged on the second supply line (50) and can be opened by a downward folding movement of a seat back (22) towards the second inflation bellows (18).

The utility model discloses a kind of oil fume separation's smoke exhaust device, it is related to smoke exhaust technical field, including processing box and cleaning component, the inside of processing box is provided with cold air pipe, and the end of cold air pipe is connected with end box, for oil dirt scraping cleaning The cleaning component is set to the outside of cold air pipe, and cleaning component includes cleaning ring, heating sheet, connecting rod, electric push rod and bellows, the inner wall of cleaning ring is equipped with heating sheet, and the outside of cleaning ring is equipped with connecting rod, the side of connecting rod is equipped with electric push rod.The oil fume separation's smoke exhaust device of this kind is cooled in the surface of oil fume in oil fume by the circulation of cold air inside cold air pipe and separated, cleaning ring moves in the outside of cold air pipe with the drive of electric push rod and scrapes cleaning to sticky oil dirt block, avoid oil dirt to accumulate too much and cause the use effect of cold air pipe to decline, heating sheet heats after electrification, so that the temperature of cleaning ring is high, and the fluency of moving in the outside of cold air pipe is improved.

The application discloses a ventilated purification bed and relates to the technical field of spring beds. The ventilated purification bed comprises a bed body, a headrest fixedly installed at one end of the bed body, a supporting assembly and an inner frame plate. The supporting assembly comprises a plurality of groups of strip-shaped wall grooves formed in the inner side walls of the corners of the bed body, and each group of the strip-shaped wall grooves is connected with a triangular cavity sleeve in the vertical direction. When the slide column moves, the push-pull plate can be driven to move synchronously. When a person gets on the bed, the hollow bracket moves downward under the weight and moves the push-pull plate through the conduction of the piston rod and the slide column, so that the air in the bellows is discharged into the ventilation channel through the exhaust pipe and is uniformly discharged to the vicinity of the person through the air cavity and the branch. The negative ion generator is arranged to enrich the air in the bellows with more negative ions, which can better care for the person when the air is subsequently blown out, thereby increasing the recuperation effect of the spring bed.

This invention relates to a composite bellows compensator inner wall protection structure, the bellows compensator itself, and its design method. The inner wall protection structure is a composite layer structure, including an anti-erosion functional layer, a transition fixing layer, and a bellows substrate. The anti-erosion functional layer includes an outer ceramic plate and an inner ceramic plate. The transition fixing layer includes an outer ring plate and an inner ring plate, which are spaced radially and staggered axially, forming a non-rigid connection structure. The inner walls of the outer and inner ring plates are respectively provided with the outer and inner ceramic plates. The bellows substrate is made of thin metal sheet and has a corrugated structure, used to realize the displacement compensation function of the bellows compensator. One end of the outer ring plate is fixedly connected to the inner wall of the bellows substrate. This invention effectively improves the wear resistance, deformation coordination, and overall operational reliability of the bellows compensator under complex working conditions by constructing a composite protection system on the inner wall of the bellows that combines high erosion resistance and good deformation adaptability.

The present invention discloses a detection device for the mechanical property fatigue life test of a bellows part, belonging to the technical field of bellows mechanical property test detection. It includes a mold mechanism, a driving mechanism, and a counting mechanism; the detection device forms two sets of independent detection units; it also includes a fixed plate and a workbench surface, and two sets of guiding components are arranged between the fixed plate and the workbench surface, and the guiding components are respectively slidably connected with movable plates; the driving mechanism is in transmission connection with the movable plates, and is used to drive the corresponding movable plates to make reciprocating up and down movements along the guiding components; the fixed plate and the movable plates are both provided with coaxially corresponding station card slots, and the mold mechanism is installed in the station card slots; the counting mechanism is linked with the driving mechanism, and is used to collect the reciprocating movement signals of the movable plates and record the total number of expansion and contraction movement cycles of the bellows. The present invention can improve the detection efficiency, realize the clamping and detection of bellows of different specifications, the detection data is more in line with the actual use state, and has certain adaptability and reliability.

The utility model discloses a wind formation demonstration device which comprises an installation substrate, a wind box is detachably connected to the installation substrate and forms a wind cavity, a smoke inlet channel, a smoke outlet channel and a through hole, the smoke inlet channel and the smoke outlet channel are communicated with the wind cavity and are arranged at an included angle, and the through hole is communicated with the wind cavity. The demonstration wind wheel is arranged in the smoke outlet channel and detachably connected with the wind box, the first placing seat is used for placing a heating body, and the first placing seat is detachably connected to the mounting substrate and can extend into the wind cavity through the through hole; and the second placing seat is used for placing the smoke generating body, is arranged in the smoke inlet channel and is detachably connected with the air bellow. According to the application, the through hole is formed in the air bellow, the air bellow is detachably connected with the mounting substrate, and when the heating body is taken and placed, the first placement seat and the heating body are exposed, so that the air bellow can be set to be smaller, air flow is accelerated, the formation process of demonstration wind is more obvious, and the heating body is taken and placed more conveniently.

The utility model discloses a kind of high wear-resistant composite PVC pipes, belong to PVC pipe technical field. Including the first fixed pipe and the second fixed pipe are fixedly connected in the end portion of bellows respectively, the outside of bellows is oppositely provided with two locating arc plates, limiting slot is passed through and is set on locating arc plate, the locating block of sliding connection with limiting slot is fixedly connected on the second fixed pipe, multiple adjusting grooves are all set on the inner wall of the opposite sides of limiting slot, locating block is provided with fixed mechanism and dismounting mechanism, the first fixed pipe and the second fixed pipe are fixedly connected with connection end head in the end away from bellows, the utility model is shortened by making bellows elongation or, to improve or shorten the overall length of pipe body, so that the overall length of pipe body can be applicable to the pipe butt joint of different interval, without cutting pipe body, more convenient and fast, save labor and efficient, to increase the practicability and flexibility of composite PVC pipe.