44results about How to "Improve structural tightness" patented technology

The invention discloses a full-automatic laser welding forming system, which relates to the technical field of laser welding, and comprises a laser generation and light beam modulation module, a material conveying and positioning module, a welding execution module, a visual inspection and monitoring module, an intelligent self-adaptive control module and an energy recovery and reutilization module, the material module accurately conveys and positions materials; the welding module robot is accurate in operation; the visual module detects welding seams; the intelligent module performs self-adaptive control; the energy module recycles energy. The welding quality is improved, and defects are reduced; the production efficiency is improved and the cost is reduced; operation is simple, and manpower requirements are reduced; energy is saved, environment is protected, and green concept is met; real-time monitoring is achieved, and the product quality and the management level are guaranteed.

The present application discloses a vibration reduction and noise reduction device for a fixed conical valve, which relates to the technical field of valves and is arranged on a fixed conical valve. The vibration reduction and noise reduction device includes a first air supply component and a plurality of second air supply components. An annular negative pressure zone is formed in the cavity on the side of the valve body close to the water outlet pipe; the first air supply component includes a plurality of air supply pipes, which are located on the outside of the guide cover, one end of which is fixedly connected to the peripheral side of the guide cover and communicated with the cavity, and can replenish gas to the position of the peripheral side of the valve body in the cavity; the second air supply component includes a plurality of air supply structures, one end of which passes through the water outlet pipe, passes through the interior of the water outlet pipe, is located in the negative pressure zone and communicates with the cavity. The present application can effectively weaken the cavitation phenomenon, thereby effectively reducing the impact of the cavitation phenomenon and reducing the vibration and noise caused by it.

The utility model relates to the field of cable bridges, and discloses a polymer composite cable bridge which comprises two side plates, reinforcing ribs are fixedly connected to the front sides and the rear sides of the side plates, fixing hooks are arranged at the tops of the side plates, a cover plate is arranged between the tops of the two side plates, and positioning grooves are formed in the left sides and the right sides of the tops of the cover plate. First components are arranged on the left side and the right side of the cover plate correspondingly, and second components are arranged on the left side and the right side of the bottom of the cover plate correspondingly. In the utility model, the weight is transmitted to the side plates on the two sides, the stress direction of the bottoms of the side plates on the two sides is towards the outer side in the process, the stress direction of the tops of the side plates on the two sides is towards the inner side, and the fixing hooks are clamped with the component II more firmly and more tightly when being extruded inwards, so that the assembly is convenient, and the enough connection strength is ensured at the same time; meanwhile, the sealing performance is better, the second component can be squeezed more and more tightly, deformation and separation of the cover plate are effectively prevented, and the structural stability and the sealing performance of the bridge frame are remarkably improved.

The invention provides a cloth fiber biochemical enzyme-catalyzing processing device, and relates to the technical field of enzyme-catalyzing decoloring equipment, the cloth fiber biochemical enzyme-catalyzing processing device comprises a cloth clamping piece, and the cloth clamping piece is provided with two enzyme-catalyzing decoloring parts; the two enzymatic decoloring parts are used for decoloring cloth through cellulase; the two enzymatic decoloring parts are connected in a magnetic attraction manner; a transition driving piece is mounted at the bottom of the cloth clamping piece, and a transition connecting piece is mounted on the transition driving piece; the transition connecting piece is fixedly mounted below the enzymatic decoloration part at the bottom; the cloth fiber biochemical enzymatic processing device can prevent the decolorizing agent from seeping and diffusing in the decolorizing process, ensures the decolorizing range precision and the decolorizing quality, and solves the problems that the decolorizing agent of the existing cloth fiber biochemical enzymatic processing device is easily diffused and absorbed outwards by the fibers in the cloth to cause decolorizing diffusion and influence the decolorizing precision.

The present invention belongs to the field of mechanical design technology, and particularly relates to an Ω-shaped metal ring for connecting composite thin-walled circular tubes, an Ω-shaped metal ring and a composite thin-walled circular tube assembly and a molding method thereof, the Ω-shaped metal ring comprising an Ω-shaped metal ring body, the Ω-shaped metal ring body comprising an Ω-shaped corrugated portion and a circular tube portion extending outward along the outer edge of the Ω-shaped corrugated portion, the wall thickness of the circular tube portion being greater than the wall thickness of the Ω-shaped corrugated portion, the connection between the circular tube portion and the Ω-shaped corrugated portion being formed with a chamfered portion forming a continuous arc transition, and the outer edge end of the circular tube portion being formed with a shoulder whose wall thickness is thicker than that of the circular tube portion. In the present invention, the Ω-shaped metal ring structure can reduce the problems of low strength and large deformation of traditional U-shaped or V-shaped metal ring structures, and provide a connection structure solution for multi-component modular mechanical equipment that simultaneously meets multi-dimensional requirements such as strength, vibration, deformation control, and connection sealing.

This utility model relates to a flame-effect decorative lamp. The lamp includes a mounting box, a first end cap and a second end cap at both ends, a decorative mesh connected to the mounting box and located between the two end caps, and an optical component mounted on the mounting box and located inside the decorative mesh. The decorative mesh has a semi-cylindrical curved surface structure with an array of through holes evenly distributed on it. A groove is provided on the back side of the mounting box, within which a mounting plate and a drive cover plate covering part of the groove are located. The drive cover plate and the mounting box together form a chamber for accommodating the drive unit. The optical component includes a diffuser and an aluminum substrate on its back side. The diffuser is fixed to the mounting box by fasteners, and a sealing gasket is provided between them. This utility model achieves a realistic and three-dimensional flame visual effect through the combination of the curved decorative mesh and the array of through holes with the optical component; the back mounting structure and double sealing design significantly improve installation stability and environmental protection level, and the structure is compact and easy to maintain.

This application discloses a relay comprising: a housing forming a contact chamber; and a first magnetically conductive member disposed within the contact chamber and mounted to the housing by fasteners; wherein a mounting hole is formed in the housing, and the fasteners pass through the mounting hole to mount the first magnetically conductive member to the housing. According to the relay of this application, by using fasteners to mechanically mount the first magnetically conductive member to the housing, a series of problems arising from the use of adhesives can be avoided.

This utility model discloses a novel refrigerator, including a cabinet body and a door. The cabinet body includes an outer shell and an inner liner, with the inner liner located within the outer shell. A cover is connected to the lower back of the outer shell, forming an installation chamber between the cover and the outer shell. A refrigeration system is installed in the installation chamber, and the refrigeration system includes a return air pipe located between and close to the inner liner and the outer shell. A foam layer made of polyurethane foam material fills the space between the inner liner and the outer shell. The inner liner is made of ABS plastic, and the outer shell is made of galvanized steel sheet. This novel refrigerator, with its galvanized steel outer shell and ABS inner liner combined with a polyurethane foam layer, enhances the structural strength and insulation of the cabinet, reducing cold air leakage. The return air pipe is equipped with a heat-conducting pipe and a heat-conducting plate to improve heat exchange efficiency. The heat from the return air pipe evaporates water from the collection box, eliminating the need for manual drainage and aiding in cooling. Overall, it achieves efficient refrigeration, convenient maintenance, and a superior storage experience.

The utility model provides a hollow glass door body and a refrigerator. The hollow glass door body comprises a door frame and hollow glass, the hollow glass comprises inner glass and outer glass, and the door frame comprises a door body frame arranged on the periphery of the hollow glass and arranged in an L shape; the door body inner frame is connected between the door body frame and the hollow glass, the two ends of the door body inner frame are connected with the two ends of the door body frame in a clamped mode to form a containing space filled with a foaming agent, and the door body outer frame is connected with the door body inner frame in a buckled mode to define a mounting groove used for mounting the hollow glass. In the utility model, the door body inner frame and the door body outer frame simultaneously buckle and press the hollow glass to achieve a stable state. The foaming agent is filled between the door body frame and the door body inner frame, so that condensation of the door body frame is effectively reduced. Meanwhile, the foaming agent is not in contact with the hollow glass, different types of hollow glass can be replaced according to different use environments so as to meet specific use requirements, and higher compatibility is achieved.

The utility model discloses a peristaltic pump, and belongs to the technical field of peristaltic pumps, the peristaltic pump comprises a main body module and two sealing modules, the main body module comprises a peristaltic pump body, the peristaltic pump body is provided with a first joint pipe and a second joint pipe, and the two sealing modules are arranged at the opposite ends of the first joint pipe and the second joint pipe respectively. The sealing module comprises an inserting pipe movably inserted into the second connector pipe, through the arrangement of a connecting pipe, an abutting disc, a fixing assembly, a pressurization sealing assembly and a boosting ring, the abutting disc can be stably fixed through the fixing assembly, the abutting disc is made to be tightly attached to one end of the second connector pipe, the fixing effect is better, and the sealing effect is better. And a plurality of pressurization sealing assemblies can be driven at the same time for pressurization, so that multi-channel filling between the outer surface of the inserting pipe and the inner wall of the second connector pipe is achieved, the sealing performance of the connector when the second connector pipe is connected with the inserting pipe is improved, the phenomenon of liquid leakage is avoided, and the sealing effect is improved.

The utility model discloses a kind of cooling tower multilayer sealing water leakage prevention center cylinder, belong to cooling tower technical field, including center cylinder main body, center cylinder main body is by first bending plate and second bending plate interconnect and constitute. First bending plate is U type, and first side flange is provided in two side edges;Second bending plate is flat plate, and second side flange is provided in two side edges. First side flange and second side flange are Z type, mutually adhere to each other and be connected by bolt, and sealing layer is provided between adhering surface. The utility model solves the problems of low production efficiency, high cost, insufficient water leakage prevention ability and other problems in the prior art, realizes the manufacture of efficient, low-cost and superior water leakage prevention performance of cooling tower center cylinder.

The invention discloses an integrated voltage and current acquisition device matched with intelligent monitoring of a low-voltage transformer area, and the device comprises a low-voltage monitoring terminal, the low-voltage monitoring terminal is provided with a wiring terminal, the wiring terminal is connected with a detection line, the detection line is connected with at least one puncture flexible Rogowski coil mutual inductor, and the puncture flexible Rogowski coil mutual inductor is connected with the low-voltage monitoring terminal. The invention relates to the technical field of electric power monitoring, and the integrated voltage and current acquisition device cooperating with intelligent monitoring of a low-voltage transformer area adopts integrated voltage puncture acquisition and current flexible acquisition, integrates voltage, current and temperature acquisition functions on a puncture flexible Rogowski coil mutual inductor, is small and simple in structure, and is convenient to use. The device is suitable for wiring environments of low-voltage cabinets of different sizes, is matched with various cable diameters, is stable in data acquisition, supports live-line rapid installation, can wrap a cable puncture position in a completely sealed manner through buckling and pulling connection, improves the structural sealing performance, and is convenient and rapid to install.

This invention relates to the field of automotive air conditioning manufacturing technology, and discloses an automotive air conditioning pipe crimping equipment, comprising a feeding device, a processing device, and a unloading device. The processing device includes end leveling, upsetting, radial extrusion, and deburring units, as well as a three-axis transfer claw. The unloading device integrates unloading and visual inspection units. The equipment achieves multi-process automatic flow of pipe fittings through the three-axis transfer claw, sequentially completing pipe end leveling, upsetting, radial extrusion forming, and deburring, ensuring processing coaxiality, avoiding pipe eccentricity and cracking, and improving pipe end forming accuracy and sealing performance. Simultaneously, online quality inspection through visual inspection during the unloading stage automatically identifies defective products. The entire machine integrates feeding, multi-process forming and finishing, online inspection, and automatic unloading, achieving a high degree of automation, reducing labor intensity, and improving production efficiency and product yield.

The invention provides a high-thermal-conductivity isostatic pressing graphite preparation system and method, and relates to the technical field of press machines. The preparation system comprises a feeding device and an isostatic pressing machine, the isostatic pressing machine comprises a high-pressure container, the interior of the high-pressure container is divided into a plurality of cavities from top to bottom, the cavities are in a cuboid shape, the side portions of the cavities are provided with pressurizing and pressure relief systems for controlling the pressure of the cavities to rise and fall, an inserting plate is arranged between every two vertically-adjacent cavities in a sliding mode, and a pressure equalizing pipe is communicated between every two vertically-adjacent cavities. And a valve, a buffer component and a throttling component are arranged on the pressure equalizing pipe. The preparation method comprises the following steps: crushing and grinding raw materials to obtain powder; filling the powder into an elastic mold and sealing; the elastic mold is put into an isostatic pressing machine for isostatic pressing forming; sequentially carrying out primary roasting, dipping, secondary roasting, graphitization and cooling on the formed material to obtain isostatic pressing graphite; and after graphite is cleaned and dried, graphene coating is sprayed and cured. The production efficiency of isostatic pressing graphite is improved by improving the working efficiency of the isostatic pressing machine.

The utility model relates to the technical field of smoke exhaust skylight and disclose a streamline smoke exhaust skylight convenient to open fast, including window top subassembly, window top subassembly is equipped with sash subassembly, window top subassembly includes streamline window top board, streamline design can reduce the wind resistance, promotes the aerodynamic performance of whole structure, and the assembly groove is set up between the center position of the upper and lower two side walls of streamline window top board for installing sash subassembly. The utility model discloses through setting up speed reducer, synchronous controller, synchronous controller controls the operation of speed reducer, drives connecting rod, connecting sleeve and other components, can drive sash frame to open fast, realizes the smoke exhaust function in the emergency such as fire rapidly, improves the opening efficiency.

The utility model belongs to the technical field of industrial dust removal equipment, and particularly relates to a cyclone cloth bag combined dust remover which is characterized by comprising a box body assembly, a tube nest is arranged in the box body assembly, and a stepped hole is formed in the tube nest; the filter bag assembly is arranged on the tubesheet, the filter bag assembly comprises a framework cage, and a connecting ring is arranged at the top of the framework cage; a groove is formed in the bottom surface of the connecting ring; the connecting ring is matched with the upper part of the stepped hole; the framework cage is sleeved with the filter bag, a clamping hoop is arranged at the top of the filter bag, the upper portion of the clamping hoop is arranged in the groove of the connecting ring, and the lower portion of the clamping hoop is matched with the lower portion of the stepped hole. The bag-type cyclone dust collector is used for solving the technical problems that the filter bag of the existing bag-type cyclone dust collector is only connected and mounted through a filter bag supporting plate, is lack of stability and poor in sealing performance during blowing, and is inconvenient to mount, dismount and replace.

The invention discloses a photovoltaic connector protective sleeve and a production method, the photovoltaic connector protective sleeve comprises a first shell and a second shell, the first shell is provided with a first accommodating groove, the second shell is provided with a second accommodating groove, and the first accommodating groove and the second accommodating groove are suitable for being matched to form an accommodating cavity for accommodating a photovoltaic connector. The first shell and the second shell are respectively provided with a combining groove and a combining part at the peripheral side of the first accommodating groove and the peripheral side of the second accommodating groove, the first shell and the second shell are respectively provided with a fixing groove and a fixing part, when the first shell and the second shell are mutually combined, the combining groove and the combining part are suitable for being mutually embedded, and the embedding part is filled with a combining medium; the fixing groove and the fixing part are suitable for being connected with each other, the combination part is limited to be separated from the combination groove, and the sealing structure has the advantages of being stable in structure and good in sealing performance.

The utility model provides an aluminum alloy and plastic combined ultrasonic cleaning machine which aims to overcome the defects of an existing ultrasonic cleaning machine in the aspects of structural strength, sealing performance, attractiveness and service life. According to the cleaning machine, aluminum alloy and plastic are combined for use, the durability and the sealing performance of equipment are improved, meanwhile, the cost is reduced, the attractiveness of a product is improved, and the service life of the product is prolonged. The aluminum alloy parts are used for key appearance and durability improving areas, such as an aluminum alloy front panel and a decorative sheet, and the upper cover, the inner cover, the side cover, the bottom shell and other parts are made of ABS materials. In addition, the device further comprises an intelligent control system, a safety protection mechanism, a water-saving design and a convenient-to-clean and convenient-to-maintain design, so that the device is more intelligent, safer, environment-friendly and easy to maintain.

The utility model relates to the technical field of roadway bottom plates, in particular to a roadway bottom plate with a self-fixing structure, which comprises a roadway bottom plate body, a first rectangular groove is formed in the outer wall of one side of the roadway bottom plate body, a second rectangular groove is formed in the outer wall of the bottom end of the roadway bottom plate body, and a sliding insertion plate is slidably connected to the inner wall of the first rectangular groove. A supporting plate is slidably connected to the inner wall of the second rectangular groove, first sliding blocks are fixedly connected to the outer walls of the two sides of the sliding insertion plate, and second sliding blocks are fixedly connected to the outer walls of the two sides of the top of the supporting plate. The roadway bottom plate body is connected through the sliding insertion plate of the roadway bottom plate body, the insertion rod is connected with the rectangular frame, front-back and left-right splicing of the roadway bottom plate body is completed, self-fixing can be achieved by pressing and placing the roadway bottom plate body to make contact with the ground, concrete pouring fixing is replaced, the roadway bottom plate body is not prone to damage and falling off, and the service life of the roadway bottom plate body is prolonged. Disassembly and recovery are convenient, the use cost is reduced, and the use efficiency of the roadway bottom plate is improved.

The utility model provides a kind of moxibustion equipment, belong to moxibustion equipment field, including combustion bin, combustion bin end part has support piece, support piece annular setting, support piece outer base surface between inside wall of combustion bin has installation cavity;Installation cavity bottom has placing table, and sensor is placed on the upper base surface of placing table, and sensor is located in installation cavity, support piece outer surface has sealing element, and heat insulating element is above sensor, and heat insulating element is located sealing element side, the utility model is applicable to the circuit board of the combustion bin end part of moxibustion mechanical arm clamping is protected, installation cavity is set in combustion bin end part, and installation cavity inside is sealed by sealing element and heat insulating element, reduce the influence of high temperature and dust to sensor, so that sensor can normally identify real-time data, ensure the normal operation of equipment.

The invention discloses an electric power control cabinet device with a protection structure, and relates to the technical field of electric power control cabinets, the electric power control cabinet device comprises an outer cabinet device and flame-retardant devices, one side of the front surface of the outer cabinet device is connected with an outer door device, the flame-retardant devices are arranged on the left and right sides of the outer cabinet device, and a ventilation device is arranged below an inner cabinet device. According to the electric power control cabinet device with the protection structure, the outer cabinet device is used in cooperation with the outer door device, effective external structure protection can be provided for internal electrical equipment, the inner cabinet device further provides double structure protection, meanwhile, space distribution and adjustability can be carried out according to the assembly requirement of electronic equipment, and the electric power control cabinet device is convenient to use. Through the use of the flame-retardant device, the problem of open fire caused by short circuit of electrical equipment assembled in the inner cabinet device can be effectively avoided, and the cooling device and the ventilation device provide heat dissipation and good ventilation effects for operation of the electrical equipment in the whole outer cabinet device.

The utility model discloses a novel connector radio frequency shielding case, which comprises a shielding case body prepared by a stretching forming process, one end of the shielding case body is a connection port, and the other end is an elastic plugging port. A plurality of notches are formed in the position of the elastic plugging port of the shielding case body, and the edge position of the elastic plugging port is divided into a plurality of elastic clamping pieces through the notches; according to the radio frequency shielding case provided by the utility model, the elastic plugging port structure is formed on the shielding case in an integrated stretching forming mode in cooperation with flanging, rotary cutting and grooving processes, and the elastic clamping pieces in the elastic plugging port can provide better deformation tension in the plugging process, so that more adjustment amplitudes can be achieved in the plug-in work; not only can the structure tightness of plug-in fit be improved, but also the plug-in work of the connector can be carried out more conveniently. Meanwhile, the overall machining difficulty is low, the production efficiency of shielding case machining in actual machining production can be effectively improved, and the machining cost is reduced.

This invention provides a vibration damping component and its manufacturing method for an electronic device, as well as an electronic device and a back cover assembly for the electronic device. The vibration damping component of the electronic device comprises, from the inside out, a zeolite porous layer and a viscoelastic polymer barrier layer. The zeolite porous layer includes a viscoelastic polymer matrix and zeolite powder dispersed within the viscoelastic polymer matrix, and the zeolite porous layer contains large pores. The vibration damping component of the electronic device provided by this invention combines viscoelastic polymer material and zeolite powder, and when placed in the gap between the back cover and the electronic device substrate, it not only achieves excellent vibration reduction, almost eliminating shell vibration of the electronic device, but also significantly improves the low-frequency acoustic performance.

The utility model provides a panoramic sliding window with a closing-up structure, which relates to the technical field of doors and windows, and comprises a left window sash, a connecting component and a right window sash, and one end of the connecting component is fixedly connected with the left window sash; the right window sash is fixedly connected with the end, away from the left window sash, of the connecting assembly. The connecting assembly comprises a first closing-in structure and a second closing-in structure, the first closing-in structure abuts against the second closing-in structure in a matched mode, and the left window sash is fixedly connected with the end, away from the second closing-in structure, of the first closing-in structure. The right window sash is fixedly connected with the end, away from the first closing-in structure, of the second closing-in structure. The panoramic sliding window with the closing-up structure not only can prevent wind and rain from invading, enhances structural stability and sealing performance of the window, but also can remarkably improve sound insulation and heat preservation and insulation effects, and creates a more comfortable environment for the interior of a room.

The utility model relates to water treatment technical field, and disclose a kind of durable water pump for sewage treatment, including support base, motor structure, shaft coupling sealing box, rotating shaft fixed structure, water pump and sewage inlet and outlet structure, motor is stably installed by motor support frame, output shaft is connected rotating shaft through shaft coupling, rotating shaft is supported by high-precision ball bearing, drive wear-resistant impeller in water pump rotation, water pump adopts side water inlet, top water outlet design, cooperate with self-cleaning grid filter screen and gradually expanding flow channel, effectively reduce blockage and energy loss, shaft coupling sealing box uses anticorrosive sealing structure, rotating shaft support system is equipped with heat dissipation channel and split type maintenance design, water pump support frame uses modular damping structure, overall rigidity installation ensures operating stability.

The utility model discloses an aluminum profile convenient to clean installation, including aluminum profile one and aluminum profile two, aluminum profile one one end is provided with the plug -in block, aluminum profile two one end is provided with the slot, and the plug -in block is inserted in the slot, the both sides of plug -in block all are provided with the inner chamber. The utility model discloses in the process of actual use, and the aluminum profile one is connected with the aluminum profile two through the cooperation of plug -in block and slot, and the sliding block of the both sides of plug -in block is embedded in the inner chamber, and when inserting the slot, is extruded compression spring no.

This utility model discloses a movable shell structure for a projection robot, including a robot with a shell. Inside the shell is a projection bracket capable of rotating around a pivot P. The projection bracket has a projection device for projecting an image forward. A drive device for rotating the projection bracket is located between the shell and the projection bracket. The front of the shell has an arc-shaped sliding window. An arc-shaped sliding cover plate is connected to the projection bracket to cover the sliding window. The centers of both the sliding cover plate and the sliding window are located on the pivot P, allowing the sliding cover plate to slide against the edge of the sliding window when the projection bracket rotates. The sliding cover plate has a projection window for the projection device to emit light. The purpose of this utility model is to overcome the shortcomings of existing technologies and provide a compact and protective movable shell structure for a projection robot.

The utility model provides modular assembly type road sound insulation screen frame relates to road sound insulation screen technical field, including bottom plate, the four corner of bottom plate installs the positioning pin, the top of bottom plate installs lower mounting seat, the both sides inside lower mounting seat installs lower cross bar, the top inside lower mounting seat installs vertical pole, the top of vertical pole installs upper mounting seat, the both sides inside upper mounting seat installs upper cross bar, the inside of lower mounting seat is provided with connecting mechanism, through being provided with connecting mechanism in the inside of lower mounting seat, the mutual match between the positioning hole, the locating piece, the screw groove, the threaded rod and the rotating block of utilizing connecting mechanism, can carry out convenient disassembly and installation handling to vertical pole, can realize module standardization quick butt joint, need not complex procedure, greatly shorten single section assembly time, can replace module alone in local damage, reduce maintenance cost, also promote transportation space utilization, save engineering cost.

The wire harness sealing assembly comprises a sealing sleeve and a sealing gasket, the sealing sleeve is attached to a set position, and the sealing gasket is connected with the set position and clamps and fixes the sealing sleeve; according to the wire harness sealing assembly and the automobile disclosed by the utility model, the arrangement of the sealing sleeve realizes the effective protection of the wire harness; the sealing sleeve is clamped and fixed by the sealing gasket and the set position, thereby effectively avoiding the damage of the wire harness caused by the loss of the sealing sleeve, improving the sealing performance of the structure, avoiding the fault of electrical equipment caused by the entry of liquid such as rainwater, and improving the driving safety of a vehicle.

The application provides a metal pipe flanging structure, comprising: a metal pipe body; a first welding auxiliary part, which is arranged on the outer peripheral side of the end part of the metal pipe body, is annular, and is provided with a first auxiliary welding surface on the side far away from the metal pipe body; a second welding auxiliary part, which is arranged on the inner peripheral side of the end part of the metal pipe body, is annular, and is provided with a second auxiliary welding surface on the side far away from the metal pipe body; the first auxiliary welding surface and the second auxiliary welding surface are flush with the end part of the metal pipe body and are perpendicular to the side wall of the metal pipe body. The flanging structure can ensure the complete filling of the weld on the inner side of the metal pipe during welding, avoid the concave weld on the outer side of the metal pipe, and improve the welding strength of the metal pipe.