943 results about "Elbow" patented technology

The package includes a base, a primary lid connected to the base, the primary lid and the base defining a primary storage area, and a locking mechanism. The locking mechanism includes a flexible member including a first segment and a second segment that are connected by an elbow, the first segment being connected to the primary lid, a distal end of the second segment including at least one contact structure, the flexible member including at least one first engaging structure between the elbow and a front surface of the at least one contact structure, and a second engaging structure on a first wall of the base. The container includes a receptacle wall cooperating with a peripheral wall to define a receptacle, and a flexible tab projecting from the top wall, the flexible tab including a fixed end adjacent to the top wall and a free end opposite the fixed end.

A system or method for controlling movement of a robot (600) using actuators may include one or more actuators (1002) of a first type positioned at torso, shoulder, and hip locations of the robot; one or more actuators of a second type (1004), the one or more actuators of the second type being positioned at a wrist position of the robot; one or more actuators (1006) of a third type, the one or more actuators of the third type being positioned at a wrist position of the robot; one or more actuators of a fourth type (1008), the one or more actuators of the fourth type being positioned at the elbow and ankle positions of the robot; one or more actuators (1010) of a fifth type, the one or more actuators of the fifth type being positioned at a torso position and a hip position of the robot; and one or more actuators (1012) of the sixth type, the one or more actuators of the sixth type being positioned at the knee position and the hip position of the robot.

The invention discloses an adaptive multi-angle elbow airtightness detection method, which comprises the following steps: arranging a flexible pressure sensor array and a micro inertial measurement unit on the inner wall of an elbow, collecting multi-point sealing pressure and attitude signals in real time, fusing geometric parameters and a spatial mapping relation, and completing denoising, normalization and multi-curvature region mapping of pressure data; a distributed pressure-attitude database is combined, a function model associated with sealing pressure and pipeline geometric parameters is established, inflation, exhaust and deformation of each node are dynamically adjusted through an intelligent closed-loop regulation and control algorithm, collaborative optimization of multi-node pressure and a fitting state is achieved, and the sealing performance of the pipeline is improved. According to the method, the accuracy and the self-adaptive adjusting capacity of sealing pressure distribution under a complex bent pipe structure are effectively improved, the tiny leakage real-time positioning and self-learning optimization capacity is achieved, and the method is suitable for sealing quality guarantee of various types of curved surface pipelines.

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 self-adjusting abrasive flow clamp is suitable for machining a tee joint through the abrasive flow technology and is characterized in that the self-adjusting abrasive flow clamp comprises a base, a baffle ring, a surrounding cylinder, a first arc-shaped bent pipe, a second arc-shaped bent pipe and a third arc-shaped bent pipe, opening structures are arranged at the two ends of the surrounding cylinder, a mounting hole is formed in the baffle ring, and an arc-shaped protrusion is arranged on the top face of the base; when abrasive particles enter through the third arc-shaped bent pipe, the abrasive materials flow out only through the first arc-shaped bent pipe; when the grinding materials are input through the groove, the grinding materials enter the tee joint through the second arc-shaped bent pipe and are output through the top end of the third arc-shaped bent pipe, the tee joint grinding efficiency is improved, and time consumption is reduced.

The invention relates to the technical field of surgical instruments, in particular to operating forceps for temporal-mandibular arthroscopic glide membrane chondroma surgery, which comprise a forceps head assembly, a rotating sleeve, a fixed block, an arc-shaped rod, a gas-driven unit and an adjustable elbow, the forceps head assembly is a working end of the operating forceps; the rotating sleeve is of a cylindrical structure and is fixedly arranged at the tail of the tong head assembly. The fixed block is fixedly arranged at one end of the rotating sleeve away from the tong head assembly; one end of the arc-shaped rod is fixedly connected with the fixed block, and the axis of the arc-shaped rod and the axis of the rotating sleeve are collinear; the gas driving unit is arranged on one side of the arc-shaped rod and used for driving the arc-shaped rod to rotate around the axis of the arc-shaped rod. The adjustable bent pipe is arranged on the side, away from the tong head assembly, of the rotating sleeve. The device can meet the path requirement of a complex anatomical space, can improve the lesion tissue removal efficiency through angle adjustment, greatly reduces the secondary operation frequency, and gives consideration to the operation flexibility and the removal accuracy at the same time.

An assembly and method for preparing a pipe elbow for welding. The assembly has a cone clamping sleeve assembly adapted to be inserted into an end of the pipe elbow and a faceplate assembly removably affixed to the cone clamping sleeve assembly. The cone clamping sleeve assembly has a face at one end thereof. The face has at least one locating hole and at least one screw hole. The faceplate assembly has at least one locating pin receivable by the locating hole of the cone clamping sleeve assembly. The faceplate assembly has a captive screw threadedly received by the screw hole. The faceplate assembly has at least a pair of centering pins positioned at diametrically opposed locations on a faceplate. The centering pins are radially adjustable and adapted to bear against an inner diameter of the end of the elbow.

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.

A portable device (1) for quantifying movements of pronation and / or supination of a person, and intended to be used when the person has the elbow on a horizontal support, comprising: a solid armature (2) with: means for attaching (4), configured to secure one hand of the person in the device (1); a central pivot element (5) intended to be in contact with the horizontal support, during the angular oscillations of the hand, between two opposed identical “first block angles” relative to a vertical position called “neutral position”, the “first block angles” defining a “small amplitude”, first means for blocking (8) the movement of pronation and the movement of supination of the elbow, at the two “first block angles”; second means for blocking (9) the movement of pronation and the movement of supination, at two identical opposed “second block angles” relative to the neutral position, between the solid armature (2) relative to the horizontal support, the “second block angles” defining a “large amplitude” greater than the “small amplitude”; an IMU (3) able to measure movement data.

A protective pad assembly for removably positioning on an arm or a leg of a user of the protective pad assembly for protecting an elbow or a knee of the user. The protective pad assembly comprises an outer protective unit including a protective cushion pad configured to protect the elbow or the knee of the user from impact, and a self-retaining device mounted to the outer protective unit for retaining the outer protective unit on the arm or leg of the user. The self-retaining device includes a resilient retaining split-ring clamp having two opposite free ends spaced from one another. The free ends of the resilient retaining split-ring clamp are circumferentially expandable or contractable relative to one another for retaining the protective pad on an arm or a leg of the user of the protective pad assembly over one of the elbow and the knee thereof.

The utility model discloses a tool changing arm core aligning mechanism, which relates to the field of tool changing arm core aligning and comprises a tool changing arm body and a tool changing shaft used for driving the tool changing arm body to move, tool clamping elbows are fixedly arranged at two ends of the tool changing arm body, a rotating ring is rotatably arranged at the upper end of the tool changing arm body, two auxiliary tool arms are fixedly arranged on the outer side of the rotating ring, and the tool clamping elbows are fixedly arranged on the tool changing arm body. According to the utility model, through the arrangement of the rubber pad, when the auxiliary elbow and the cutter clamping elbow abut against a cutter, the impact force of the auxiliary elbow and the cutter clamping elbow on the cutter can be buffered through the rubber pad; the impact force of the auxiliary elbow and the cutter clamping elbow is prevented from being transmitted to the main shaft of the machining center through the cutter, so that the influence on the main shaft when the cutter is replaced is reduced to the maximum extent.

Dynamic arm brace assemblies and methods of use are provided herein. An example device includes a torso connection member securable to a torso of a patient, a forearm support member that couples with at least a forearm of an patient, the forearm support member couples with the torso connection member so as to fix an elbow of the patient proximate the torso, the forearm support member being pivotally coupled to the torso connection member to allow for an angle between the forearm support member and a coronal plane of the patient, and a dynamic tensioning assembly that externally rotates the forearm support member and selectively sets the angle so as to stretch a shoulder capsule (capsule and adjacent tissue(s)) affected with adhesive capsulitis, reducing the adhesive capsulitis.

The invention relates to the field of concrete construction, and discloses a building construction material distributing machine with an anti-condensation structure, the building construction material distributing machine comprises a mounting frame and a pipeline assembly mounted on the mounting frame, and the pipeline assembly mainly comprises a first elbow and a second elbow; internal components of the elbow I and the elbow II are used for preventing concrete from layering at the elbow due to different flow speeds of an inner layer and an outer layer and finally preventing a large amount of concrete from being left at the elbow; a watering component which can be controlled to be opened through water pressure is also arranged in the elbow I; the building construction material distributing machine with the anti-condensation structure is provided with the pipeline assembly, firstly, the layering phenomenon of concrete can be reduced, aggregate is continuously taken away through slurry, secondly, heat preservation can be conducted on the concrete through water with different temperatures according to the environment temperature, the situation that the concrete is initially set in advance and remains at the elbow position is prevented, and finally, the construction efficiency is improved. When the initial setting phenomenon occurs, water can be supplemented in time, and the initial setting phenomenon is relieved or eliminated.

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 utility model relates to the technical field of seamless elbows, in particular to an elbow die for seamless stamping elbow production. Comprising a base, a supporting rod, a top plate, a double-shaft air cylinder, a first arc-shaped plate, a second arc-shaped plate and a cleaning module, the cleaning module comprises a supporting frame, a driving air cylinder, a mounting frame, an arc-shaped scraping plate, an air pump, a conveying pipe and an air nozzle, the supporting frame is fixedly connected with one side of the second arc-shaped plate, and the driving air cylinder is fixedly connected with the supporting frame and located on the outer side wall of the supporting frame; the installation frame is fixedly connected with the output end of the driving air cylinder, an air nozzle is arranged at the upper end of the installation frame, an arc-shaped scraper blade is arranged at the lower end of the installation frame, the air pump is fixedly connected with the installation frame and located on the outer side wall of the installation frame, one end of the conveying pipe is communicated with the output end of the air pump, and the other end of the conveying pipe is communicated with the air nozzle. And the effects that impurities left after the previous elbow is produced are cleaned, and the influence on the next elbow production is avoided are achieved.

The utility model relates to a splicing type pneumatic conveying pipeline elbow which comprises an inlet flange, an inlet straight pipe, an inlet transition pipe, an impact elbow, a wear-resisting elbow, an outlet transition pipe, an outlet straight pipe and an outlet flange which are sequentially connected, and a fastening hoop assembly is arranged outside a connecting port of the impact elbow and the wear-resisting elbow. The section of each of the impact elbow and the wear-resistant elbow is a special-shaped surface consisting of a semicircular structure at the upper half part and a semi-elliptical structure at the lower half part, the radius of the semicircular structure is equal to half of the length of the short axis of the semi-elliptical structure, and the ratio of the length of the long axis of the semi-elliptical structure to the radius of the semicircular structure is greater than 1.6. By arranging the special-shaped section form of the elbow, a vortex is formed when gas flows through the inlet transition pipe, and the vortex can collide with incoming flow, so that the speed of fluid is reduced, the impact force of materials on the turning part of the elbow is relieved, and the abrasion degree of the inner wall of the elbow is reduced; and the pipe section can be partially replaced when being partially damaged, so that the comprehensive service life of the elbow pipe is prolonged.

The invention belongs to the technical field of pipe fitting machining equipment, and particularly relates to a pipe bending and pipe expanding integrated pipe fitting machining device which comprises an expansion bent pipe, two sets of pipe clamping components, two sets of pipe clamping parts and two sets of pipe clamping parts, a metal shaping ball is placed in the expansion bent pipe, and the inner diameter pipe expanding work of the bent pipe is achieved through the extrusion acting force of the shaping ball on the inner wall of the expansion bent pipe. The clamping device is used for clamping the outer surface of the expansion elbow. According to the device, a bending force arm and a small thrust ball can be driven by a torsion motor to pressurize a shaping ball in an expansion elbow, so that pipe expansion machining on the inner wall of the elbow is achieved, the bending force arm rotates along with the axis of an inserting rotary drum, the small thrust ball can always directly face the shaping ball to conduct thrust extrusion movement, and the inner wall of the elbow is expanded. And the extrusion action point on the molding ball does not need to be manually adjusted, so that the problem of extrusion injury to an angle adjusting worker during punching can be effectively avoided, and the purpose of safe production is achieved.

The invention relates to the technical field of elbow welding devices, and provides an elbow fixing type chuck welding device which is used for welding a splicing gap of two semicircular elbows to form an elbow, two positioning lug plates are pre-welded to the same side of the elbow, and locking insertion holes are formed in the positioning lug plates in a penetrating mode. The multiple shape righting pieces are arranged on the guide column at intervals in the length direction of the guide column, the shape righting pieces are used for abutting against the inner wall of the elbow, and a guide fastener is arranged on the welding unit, is used for being buckled on the guide column and slides along the guide column; the guide column is used for stretching into the elbow and detachably connected with the rack, the guide column has the same curvature as the inner wall of the elbow, and the shape correcting piece is used for abutting against the inner wall of the elbow so that the welding unit can move along the guide column and weld a splicing gap of the elbow. According to the technical scheme, the technical problems that the advancing direction of the welding machine is not easy to master through manual operation and the welding precision is reduced in the prior art are solved.

The utility model discloses a negative pressure valve connecting elbow of a negative pressure drainage system, and particularly relates to the technical field of elbow pipe fittings, the negative pressure valve connecting elbow comprises an elbow pipe, a straight pipe and a connecting pipe which are sequentially arranged from left to right, an extension pipe is arranged in the straight pipe, the elbow pipe is in flange connection with the straight pipe, the extension pipe is in flange connection with the connecting pipe, and a negative pressure valve is arranged on the connecting pipe. A sealing assembly is arranged at one end of the extension pipe, and an abutting disc used for abutting against the sealing assembly is arranged on the outer side of the extension pipe. A sealing plate is connected to a flange at the end, back on to the bent pipe, of the straight pipe, a first driving structure and a second driving structure are arranged on the sealing plate, the first driving structure is connected with the sealing assembly, and the second driving structure is connected with the abutting disc. The sealing assembly comprises a fixing ring, the fixing ring is fixedly connected to one end of the outer surface of the extension pipe, and the ring side of the fixing ring is sleeved with a sealing ring; the connecting elbow solves the technical problem that the installation applicability is reduced due to the fact that an existing connecting elbow does not have the installation compensation capacity.

The application discloses a sleeve type elbow pipe sliding block device and a use method thereof, and belongs to the technical field of elbow pipes of dredging ships. The sleeve type elbow pipe sliding block device comprises a sliding block seat sliding on a lateral guide rail of a ship body, further comprises a hinged arm structure, the hinged arm structure is rotationally connected with the sliding block seat, and an elbow pipe body is arranged in the hinged arm structure; a first connecting piece is fixedly arranged on one side of the sliding block seat and rotationally connected with the elbow pipe body; a sealing piece is fixedly connected with the first connecting piece and used for sealing a gap between the elbow pipe body and the first connecting piece; and a second connecting piece is fixedly connected with the sliding block seat. The application changes the stress of the elbow pipe body from the structural design, so that the elbow pipe no longer bears the pulling force of the rake pipe, the pulling force burden is released, the design focus is on the wear resistance, the wear-resistant surfacing pipe type is adopted, the service life of the elbow pipe is prolonged, the repair period of the elbow pipe body is prolonged, and the construction efficiency of the dredging ship is ensured.

The invention provides a method for drawing an expansion drawing of a branch pipe on an elbow, which comprises the following steps of: S1, inputting parameters of a known elbow and a branch pipe arranged on the elbow, and checking the rationality of the parameters; s2, calculating coordinates of points of a branch pipe expansion curve according to input known parameters; and S3, drawing an expanded drawing according to the point coordinates. The invention further provides an elbow upper branch pipe expansion drawing drawing device, computer equipment and a readable storage medium. According to the method, the unfolding shape of the branch pipe on the elbow is calculated through the mathematical principle, a set formula set is formed, coordinates can be calculated according to the input parameters of the elbow and the branch pipe installed on the elbow, the unfolding drawing of the branch pipe on the elbow is automatically drawn, manual drawing is not needed, the working process is simplified, the labor amount is reduced, and the working efficiency is improved. The drawing efficiency of the elbow upper branch pipe expansion drawing is greatly improved, errors possibly existing in the manual drawing process are reduced, and the drawing accuracy is improved.

The application discloses a kind of spatial three-dimensional elbow pipe measuring devices and its elbow pipe equipment and method.The application provides a kind of spatial three-dimensional elbow pipe measuring device.The spatial three-dimensional elbow pipe device includes magnet and goniometer mounting seat, and goniometer and base;The goniometer is installed on the goniometer mounting seat;The base one side is provided with first V-shaped groove, the magnet is arranged on the side opposite to the first V-shaped groove, and the goniometer mounting seat is connected to the base or the magnet, and the goniometer is installed.By directly installing spatial three-dimensional elbow pipe measuring device on elbow pipe, the bending angle of high-precision elbow pipe required by spatial position measurement is obtained, which helps to solve the technical problems in the prior art that there is no way to manufacture high-precision angle pipe under spatial angle.

The application discloses an erosion-resistant elbow and a preparation method thereof, and specifically comprises the following steps: (1) structure design and blank preparation; (2) preparation of cladding powder; (3) pretreatment; (4) laser cladding treatment; and (5) post-treatment. According to different erosion degrees of different regions of the inner wall of the elbow, different cladding layers are designed, and reasonable elbow structures and cladding materials are designed, so that the erosion-resistant performance of the inner wall of the elbow is maximally improved.

The invention relates to an outlet elbow assembly (100) for discharging a multiphase flow medium, in particular consisting of water, solids and air, in which the outlet elbow assembly comprises a pipe (101) having a first horizontal pipe section (102) which, in a mounted position, extends along a first centerline (M102) running in a horizontal direction (H), and a second horizontal pipe section (102) which, in a mounted position, extends along a second centerline (M102) running in a horizontal direction (H); a downcomer section (103) adjoining the first horizontal section (102) and extending in the installed position along a downcomer line (F) running downward; and a second horizontal pipe section (104) adjoining the downcomer section (103) and extending in the installed position along a second centerline (M104) running in the horizontal direction (H). In the installed position, the second centerline (M104) lies below the first centerline (M102) and the flow medium is guided through the pipe (101) in the flow direction (A) in the direction of the first centerline (M102), the descending line (F) and the second centerline (M104). The downcomer section (103) and / or the second horizontal section (104) are / is equipped with at least one guide element (105, 307, 406) which is designed and arranged in such a way that the flow medium can be guided substantially in the flow direction (A) and a movement perpendicular to the flow direction (A) is partially suppressed.

The invention discloses a manipulator with a pair of mechanical arm elbows capable of independently and horizontally displaceing.The manipulator comprises a base, the two mechanical arms are movably arranged on the base, and the base is further provided with a walking mechanism, a first driving shaft for driving the two mechanical arms to generate kneading action and a second driving shaft for driving the two mechanical arms to generate knocking action; the first driving shaft is sleeved with an elbow arm sleeve, the elbow arm sleeve is arranged on the driving shaft in a sleeving mode and can move in the axis direction of the driving shaft, the elbow arm sleeve and the first driving shaft are in circumferential limiting fit, and a driving unit is arranged on the base. The driving unit is connected with the elbow arm sleeve and used for driving the elbow arm sleeve to move in the axis direction of the first driving shaft, and the mechanical arm is movably connected to the outer side of the elbow arm sleeve in a sleeving mode and generates kneading action based on rotation of the elbow arm sleeve. The pair of manipulators with the mechanical arm elbows capable of independently and horizontally displacing has better adaptability to users with different body widths, and richer massage actions can be provided.

Embodiments of the present application disclose a vector elbow centerline acquisition method and device, computer equipment and a storage medium. The method comprises: importing a three-dimensional model; using OpenCascade technology to acquire the outer surface of the pipe material of the three-dimensional model; using OpenCascade technology to make an equal parameter curve of the outer surface along the generatrix direction; using OpenCascade technology to create an intersection surface with the parameter curve inside the equal parameter curve as a boundary; and acquiring the intersection line of the intersection surface to obtain the elbow centerline. The method of the embodiments of the present application can improve the accuracy of the elbow centerline acquisition, and is suitable for various complex bending component models and has high efficiency.

The utility model discloses a double-elbow sliding sleeve hanging umbrella. The double-elbow sliding sleeve hanging umbrella comprises an elbow base, a lower elbow, an upper elbow, an umbrella stand body and a handrail assembly. And the lower bent pipe is fixed on the bent pipe base. The upper bent pipe is connected with the lower bent pipe in a sliding mode through the armrest shell assembly. And a mounting groove matched with the upper bent pipe is formed in the inner side surface of the lower bent pipe. And the upper bent pipe is mounted in the mounting groove. A semi-wrapping structure is designed between the lower elbow and the upper elbow, so that the storage space of the lower elbow and the storage space of the upper elbow are greatly reduced. Meanwhile, the position between the umbrella stand main body and the upper bent pipe is limited in the unfolded state, so that the umbrella stand main body can stretch out and draw back along with the upper bent pipe in the unfolded state, and the orientation angle of the umbrella cover on the umbrella stand main body is adjusted.

The present invention is a biarticular forearm support brace comprising a hand wrap, an arm wrap, vibrational motors, and EMG sensors. In the preferred embodiment of the present invention, the present invention further comprises medical-grade materials with elastic properties and a plurality of straps. The present invention takes the tension off the extensor muscles in the forearm by pulling the hand towards the elbow, replacing muscle function and allowing the extensor muscles in the forearm to be shortened while not being contracted.

The utility model relates to the technical field of steel pipe elbows, and discloses a steel pipe elbow with a lengthening function, which comprises an elbow steel pipe, a connecting mechanism, a connecting steel pipe, an outer sealing gasket and an inner sealing gasket, the connecting mechanism is arranged at the connecting position of the elbow steel pipe and the connecting steel pipe, and the connecting mechanism comprises two semicircular shells and a hinge. Clamping blocks are fixedly connected to the sides, close to the elbow steel pipe, of the interiors of the two semicircular shells, springs are fixedly connected to the upper portions and the lower portions of the sides, away from the elbow steel pipe, of the two clamping blocks, moving blocks are fixedly connected to one ends of the two springs on the same side, and rubber pads are fixedly connected to the sides, away from the elbow steel pipe, of the interiors of the two semicircular shells. According to the utility model, the relative position of the elbow steel pipe and the connecting steel pipe can be adjusted through the matched use of the elbow steel pipe and the connecting steel pipe, and meanwhile, the connection between the adjusted elbow steel pipe and the connecting steel pipe is firmer through the connecting mechanism.