Compression-resistant heat-preservation stainless steel pipe and production welding equipment thereof

Abstract

The invention relates to the technical field of pipe production and welding, in particular to a compression-resistant heat-preservation stainless steel pipe and production and welding equipment thereof.The stainless steel pipe comprises a pipe body, the pipe body is composed of an outer pipe, an inner pipe and a framework fixedly arranged between the inner pipe and the outer pipe, and vacuum cavities are formed between the inner ring face and the outer ring face of the outer pipe and between the inner ring face and the outer ring face of the inner pipe; the inner side of the vacuum cavity is coated with a heat preservation coating, and the stainless steel pipe can achieve multiple heat preservation and compression resistance; the production welding equipment comprises a base, a bearing frame is fixedly arranged at the top of the base, and a continuous welding mechanism used for welding two pre-inserted pipe bodies and a buffer grinding mechanism used for grinding welding areas of the two welded pipe bodies are installed on the two sides of the top of the bearing frame correspondingly. According to the production welding device, continuous welding machining can be achieved, polishing machining of the welding face can be completed in the discharging process, and the purpose that one machine has multiple purposes is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of pipe production welding, in particular to a pressure-resistant heat-insulating stainless steel pipe and production welding equipment thereof. Background Art

[0002] Stainless steel pipe is a hollow long round steel, which is widely used in industrial pipelines such as petroleum, chemical, medical, food, light industry, mechanical instruments, and mechanical structural components. Traditional stainless steel pipes often cause local depressions due to the inability to withstand pressure during use, making the pipes easily damaged, thereby reducing the service life of stainless steel pipes. In addition, during the long pipeline laying process, it is usually necessary to weld the steel pipes so that the pipelines can continue to extend.

[0003] The prior art discloses a Chinese patent with publication number CN 116352361 A: a stainless steel pipe welding device, and discloses a clamping mechanism, which uses a servo motor to drive two clamping frames to slide toward each other on a carrier through a transmission assembly, so that the clamping assembly clamps and fixes the stainless steel pipe to prevent the stainless steel pipe from shaking during the welding process.

[0004] However, the above-mentioned prior art still has certain defects, that is, during use, manual loading and unloading is required after each welding is completed, and the welding continuity is poor. In addition, when the welding surface needs to be polished, the welded stainless steel pipe needs to be transferred to the corresponding workstation for processing. Summary of the invention

[0005] The object of the present invention is to provide a pressure-resistant and heat-insulating stainless steel pipe and a production and welding device thereof, so as to solve the problems raised in the above-mentioned background technology.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A pressure-resistant heat-insulating stainless steel pipe, comprising a pipe body, the pipe body consisting of an outer pipe, an inner pipe and a frame fixedly arranged between the inner pipe and the outer pipe, a vacuum cavity is opened between the inner and outer annular surfaces of the outer pipe and the inner pipe, and the inner side of the vacuum cavity is coated with a heat-insulating coating, and one end of the outer pipe and the inner pipe is equipped with a gas nozzle connected to the vacuum cavity;

[0008] The skeleton includes two sealing rings and a plurality of supporting rings located between the two sealing rings. A plurality of straight rods evenly distributed in a ring shape are fixedly connected between the two sealing rings. The supporting rings are fixed on the outside of the straight rods. Both sealing rings are provided with through holes. A convex ring corresponding to the through hole is fixed on the outside of one of the sealing rings. A connecting opening is provided on the outside of the supporting ring between two adjacent straight rods.

[0009] The present invention also provides a production welding device for welding two adjacent sections of the above-mentioned pressure-resistant heat-insulating stainless steel pipe, comprising a base, a carrier frame is fixedly provided on the top of the base, and a continuous welding mechanism for welding the two sections of the pre-plugged pipe body and a buffer grinding mechanism for grinding the welding area of ​​the two sections of the pipe body after welding are respectively installed on both sides of the top of the carrier frame;

[0010] An intermittent feeding mechanism for uninterrupted automatic feeding is fixedly installed at one end of the top of the base close to the continuous welding mechanism.

[0011] In a preferred embodiment, the intermittent feeding mechanism comprises two vertical frames fixed on the top of the base, a transition bin is fixed between the tops of the opposite sides of the two vertical frames, a notch groove is opened on one side of the transition bin, a material guide seat is fixed at a position corresponding to the notch groove on the top of the base, an inclined support is fixed on one side of the material guide seat, a sealing plate is movably attached to the top of the inclined support, and a second elastic member is provided between the sealing plate and the material guide seat;

[0012] The second elastic member includes two inclined rods fixedly connected to the outside of the material guide seat and a socket corresponding to the inclined rod opened on one side of the sealing plate. One end of the inclined rod is movably inserted into the corresponding socket. The outsides of the two inclined rods are movably sleeved with straight springs fixedly connecting the sealing plate and the material guide seat.

[0013] In a preferred embodiment, the continuous welding mechanism comprises two slide grooves 1 opened on the surface of the carrier frame and a slide groove 2 located between the two slide grooves 1, the two slide grooves 1 are slidably connected with a slide seat inside, the slide groove 2 is slidably connected with a push seat inside, a horizontal plate is fixedly arranged between the two slide seats, a bottom frame sleeved on the outside of the push seat is fixedly arranged at the bottom of the horizontal plate, and a cylinder 1 for pushing the push seat to move is fixedly installed at one end of the carrier frame;

[0014] The two sliding seats are provided with a vertical plate fixed on the surface of the carrier frame on the opposite side of each other, and a limiting groove is penetrated through one side of each of the two vertical plates. The two ends of the horizontal plate are respectively inserted into the corresponding limiting grooves, and a tooth plate is fixed on the top of each of the two vertical plates. A trapezoidal guide block is fixed on the surface of the carrier frame on the opposite side of each of the two vertical plates.

[0015] A bracket is fixedly provided on the top of the two slides, a blanking frame is fixedly connected between the top surfaces of the two brackets, a supporting assembly located between the two slides is installed at the bottom of the blanking frame, a tightening assembly is installed on the top of the two slides, and a tooth seat corresponding to the supporting assembly and a lifting seat located on both sides of the second slide groove are also fixedly provided on the surface of the carrier frame, and a through groove is opened on the side of the tooth seat and the lifting seat facing the cross plate.

[0016] In a preferred embodiment, the support assembly includes a J-shaped plate fixed to the bottom end of the blanking frame, a T-shaped arc groove corresponding to the gear seat is provided on the outer side of the J-shaped plate, an arc-shaped through groove connected to the T-shaped arc groove is provided on the inner side of the J-shaped plate, a T-shaped arc plate is slidably connected inside the T-shaped arc groove, a rack is fixed on the outer side of the T-shaped arc plate, and an elastic member 1 is provided inside the arc-shaped through groove;

[0017] The elastic member 1 comprises a slider fixed at one end of the T-shaped arc plate, the slider is slidably connected to the inside of the arc-shaped through groove, an arc rod movably penetrating the slider is fixed inside the arc-shaped through groove, and an arc spring is sleeved outside the arc rod.

[0018] In a preferred embodiment, the tightening assembly includes a circular hole formed on the corresponding slide seat and a sleeve inserted into the circular hole, a ring block and a gear are fixedly sleeved on the outer side of the sleeve, and a ring groove matching the ring block is formed on the inner side of the circular hole;

[0019] A round rod is sleeved through the inside of the sleeve, and a limit strip and a retaining ring are fixedly provided at both ends of the outer side of the round rod. A groove matching the limit strip is opened at one end of the inner side of the sleeve, a hemisphere is fixedly provided at the end of the round rod away from the retaining ring, and a spring is sleeved on the outer side of the round rod to fix the retaining ring and the corresponding sliding seat.

[0020] In a preferred embodiment, the buffer grinding mechanism includes two side baffles fixed on the surface of the carrier frame, a deflection seat is rotatably installed between opposite sides of the two side baffles, and a grinding part is installed at one end of the side baffle away from the continuous welding mechanism.

[0021] In a preferred embodiment, the grinding part includes a mounting frame fixed on the surface of the carrier frame, a shaft rod corresponding to the mounting frame is rotatably installed between the two side baffles, and a servo motor driving the shaft rod to rotate is fixedly installed on one side of the mounting frame;

[0022] Four straight plates evenly distributed in an annular shape are fixedly provided at the middle part of the outer side of the shaft rod, roller grooves and machine grooves are penetrated on the straight plates, a rubber roller is rotatably installed inside the roller groove, a driving motor for driving the rubber roller to rotate is installed inside the machine groove, four straight bars evenly distributed in an annular shape are fixedly provided at both ends of the outer side of the shaft rod, and the straight bars are located on the angular bisector between the corresponding two adjacent straight plates, and convex rods are fixedly provided on the opposite side of the straight bars at both ends of the shaft rod;

[0023] The grinding part also includes a straight through groove opened in the middle of the surface of the carrier frame, and the surface of the carrier frame is also provided with a vertical groove and a cross groove 1 located at both ends of the straight through groove, and a cross seat 1 is movably sleeved inside the two cross grooves 1, and a shaft rod 2 is rotatably installed between the bottom ends of the two cross seats 1, and a driving motor 2 for driving the shaft rod 2 to rotate is fixedly installed on one side of one of the cross seats 1, and a grinding roller is fixedly sleeved on the middle part of the outer side of the shaft rod 2;

[0024] A top block is movably inserted inside the two vertical grooves, and the two top blocks are movably sleeved on the outer sides of the two shaft rods. Trapezoidal guide grooves are opened on the opposite sides of the two cross seats, and protrusions for limiting the sinking amount of the cross seats are fixed on the outer sides of the two cross seats.

[0025] In a preferred embodiment, a feeding pretreatment mechanism corresponding to the intermittent feeding mechanism is further provided on the top of the base, and the feeding pretreatment mechanism comprises a U-shaped frame fixed to the outside of the material guide seat and a silo fixed to the top of the base, and a feeding port corresponding to the silo is opened on one side of the U-shaped frame;

[0026] The U-shaped frame is provided with a second cylinder fixed on the top of the base, the telescopic end of the second cylinder is fixedly connected with a trapezoidal lifting block, and an adjustment component for adjusting the relative position of the two pre-inserted pipe sections is provided between the trapezoidal lifting block and the U-shaped frame.

[0027] In a preferred embodiment, the adjustment assembly includes a guide platform fixed to the top of the inner side of one end of the U-shaped frame and a cross slot 2 opened at the other end of the U-shaped frame, a cross seat 2 is slidably installed inside the cross slot 2, and a drive motor 3 is fixedly installed on one side of the cross seat 2;

[0028] The adjustment component also includes an arc-shaped embedding groove opened on the top of the trapezoidal lifting block and an arc block fixed on the top of the trapezoidal lifting block. A rubber roller 2 driven to rotate by a driving motor 3 is rotatably installed inside the arc-shaped embedding groove.

[0029] Beneficial effects of the present invention:

[0030] 1. The present invention can form a multi-layer thermal insulation structure by combining the vacuum cavity on the inner tube and the outer tube, which is evacuated to a vacuum state, and the thermal insulation coating inside the vacuum cavity with the inert protective gas filled inside the skeleton placement area between the inner tube and the outer tube. At the same time, the vacuum cavity on the inner tube and the outer tube, which is evacuated to a vacuum state, and the skeleton placement area between the inner tube and the outer tube, which is filled with inert protective gas, cooperate with the skeleton to form a multi-layer pressure-resistant structure, thereby improving the overall thermal insulation and pressure resistance performance;

[0031] 2. The present invention uses a continuous welding mechanism that reciprocates to control the intermittent discharge of the transition bin, thereby realizing continuous automatic loading, welding, and unloading of stainless steel pipes, thereby improving production welding efficiency. In addition, during the unloading process, the welding surface can also be polished, thereby achieving the purpose of one machine with multiple uses.

[0032] 3. The present invention can automatically pre-join and center the two sections of the pipe body before welding through the feeding pretreatment mechanism, which lays a foundation for subsequent continuous automatic welding, and is convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is a schematic diagram of the overall structure of the pressure-resistant and heat-insulating stainless steel pipe of the present invention;

[0035] Figure 2 It is a partial structural cross-sectional view of the outer tube of the pressure-resistant and heat-insulating stainless steel tube of the present invention;

[0036] Figure 3 The present invention Figure 2 A schematic diagram of the structure enlargement of part A;

[0037] Figure 4 It is a schematic diagram of the overall structure of the production welding equipment of the present invention from a first perspective;

[0038] Figure 5 It is a second perspective overall structural diagram of the production welding equipment of the present invention;

[0039] Figure 6 It is a schematic diagram of the structure of the continuous welding mechanism of the production welding equipment of the present invention;

[0040] Figure 7 It is a schematic structural diagram of the material supporting part of the continuous welding mechanism of the production welding equipment of the present invention from the first perspective;

[0041] Figure 8 It is a structural schematic diagram of the material supporting part of the continuous welding mechanism of the production welding equipment of the present invention from a second viewing angle;

[0042] Fig. 9 It is a schematic diagram of the structure of the tightening assembly of the continuous welding mechanism of the present invention;

[0043] Fig.10 It is a schematic diagram of the structure of the buffer grinding mechanism of the welding equipment produced by the present invention;

[0044] Fig.11 It is a structural schematic diagram of a material feeding pretreatment mechanism of a production welding device of the present invention;

[0045] Fig.12 It is a schematic diagram of the structure of the intermittent feeding mechanism of the welding equipment produced by the present invention.

[0046] The reference numerals in the figure are as follows: 1, outer tube; 2, inner tube; 3, frame; 31, sealing ring; 32, perforation; 33, convex ring; 34, straight rod; 35, support ring; 36, connecting port; 4, vacuum chamber; 5, thermal insulation coating; 6, air nozzle; 7, continuous welding mechanism; 71, slide groove 1; 72, slide seat; 73, bracket; 74, blanking frame; 75, bracket assembly; 751, J-type plate; 752, T-type arc groove; 753, T arc plate; 754, rack; 755, arc groove; 756, elastic member 1; 76, top tightening assembly; 761, sleeve; 762, ring block; 763, gear; 764, round rod; 765, retaining ring; 766, limit strip; 767, hemisphere; 768, spring; 77, bottom frame; 78, push seat; 79, cylinder 1; 710, horizontal plate; 711, vertical plate; 712, limit groove; 713, tooth plate; 714, ladder shaped guide block; 715, tooth seat; 716, material ejector seat; 717, slideway 2; 8, buffer grinding mechanism; 81, side baffle; 82, deflection seat; 83, mounting frame; 84, straight plate; 85, rubber roller 1; 86, straight bar; 87, convex rod; 88, vertical groove; 89, cross groove 1; 810, cross seat 1; 811, ejector block; 812, grinding roller; 813, straight through groove; 814, trapezoidal guide groove; 9, feeding pre-processing machine Structure; 91, silo; 92, U-shaped frame; 93, guide platform; 94, cylinder 2; 95, rubber roller 2; 96, trapezoidal lifting block; 97, arc block; 98, arc-shaped embedded groove; 99, cross groove 2; 910, cross seat 2; 10, base; 11, support frame; 12, intermittent feeding mechanism; 121, guide seat; 122, vertical frame; 123, transition bin; 124, inclined support; 125, sealing plate; 126, elastic part 2. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] The production welding equipment of the present invention belongs to a type of metal material welding equipment and is mainly used for production welding of stainless steel pipes, and is specifically used for clamping and positioning the stainless steel pipes during the welding process.

[0049] Refer to the instruction manual Figure 1-3A pressure-resistant heat-insulating stainless steel pipe according to an embodiment of the present invention comprises a pipe body, the pipe body comprising an outer pipe 1, an inner pipe 2 and a frame 3 fixedly arranged between the inner pipe 2 and the outer pipe 1, a vacuum cavity 4 is provided between the inner and outer annular surfaces of the outer pipe 1 and the inner pipe 2, and the inner side of the vacuum cavity 4 is coated with a heat-insulating coating 5, and one end of each of the outer pipe 1 and the inner pipe 2 is provided with a gas nozzle 6 connected to the vacuum cavity 4;

[0050] The skeleton 3 includes two sealing rings 31 and a plurality of supporting rings 35 located between the two sealing rings 31. A plurality of straight rods 34 evenly distributed in an annular shape are fixedly connected between the two sealing rings 31. The supporting rings 35 are fixed on the outside of the straight rods 34. Both sealing rings 31 are provided with through holes 32. A convex ring 33 corresponding to the through hole 32 is fixedly provided on the outside of one of the sealing rings 31. The through hole 32 and the convex ring 33 are both arranged as a truncated cone structure, which is convenient for quickly completing the pre-insertion and centering between the two adjacent sections of the tube body during the welding process. A connecting port 36 is provided on the outside of the supporting ring 35 between the two adjacent straight rods 34. The connecting port 36 can be used to allow the gas to quickly fill the installation area of ​​the skeleton 3 between the inner tube 2 and the outer tube 1 during the process of filling the inert protective gas into the installation area of ​​the skeleton 3 between the inner tube 2 and the outer tube 1, so as to improve the thermal insulation performance between the inner tube 2 and the outer tube 1. At the same time, it can also cooperate with the skeleton 3 to further improve the overall compressive performance of the stainless steel tube.

[0051] It should be noted that the pressure-resistant and heat-insulating stainless steel pipe of the present invention forms a multi-layer insulation structure by utilizing the vacuum chamber 4 evacuated to a vacuum state on the inner tube 2 and the outer tube 1 and the heat-insulating coating 5 inside the vacuum chamber 4 to cooperate with the inert protective gas filled inside the skeleton 3 placement area between the inner tube 2 and the outer tube 1 to improve the overall heat-insulating performance of the stainless steel pipe. In addition, the vacuum chamber 4 evacuated to a vacuum state on the inner tube 2 and the outer tube 1 and the skeleton 3 placement area filled with inert protective gas between the inner tube 2 and the outer tube 1 are also utilized to cooperate with the skeleton 3 to improve the overall pressure resistance of the stainless steel pipe.

[0052] Example 1

[0053] Refer to the instruction manual Figure 4-5 A production welding device for a pressure-resistant and heat-insulating stainless steel pipe according to an embodiment of the present invention is used to weld two adjacent sections of the pressure-resistant and heat-insulating stainless steel pipe, including a base 10, a carrier frame 11 is fixedly provided on the top of the base 10, a continuous welding mechanism 7 for welding the two pre-connected sections of the pipe body is installed on one side of the top of the carrier frame 11, an intermittent feeding mechanism 12 for uninterrupted automatic feeding is fixedly installed on one end of the top of the base 10 close to the continuous welding mechanism 7, and a feeding pretreatment mechanism 9 corresponding to the intermittent feeding mechanism 12 is also provided on the top of the base 10.

[0054] It should be noted that the present invention uses a feeding pretreatment mechanism 9 to pre-join and align the two sections of the pipe body to be welded, and transports the two sections of the pipe body that have been pre-joined and aligned to the intermittent feeding station, and then uses a continuous welding mechanism 7 to perform uninterrupted continuous welding on the two sections of the pipe body to be welded that are intermittently supplied, thereby improving the welding efficiency.

[0055] Specifically, Figure 5 and Fig.12 As shown, the intermittent feeding mechanism 12 includes two vertical frames 122 fixed on the top of the base 10, and a transition bin 123 arranged in an inclined manner is fixed between the top ends of the two vertical frames 122 on opposite sides. A notch groove is opened on one side of the transition bin 123, and a material guide seat 121 is fixed at a position corresponding to the notch groove on the top of the base 10, wherein the upper end surface of the material guide seat 121 is inclined downward and extends into the notch groove, and an inclined support 124 is fixed on one side of the material guide seat 121. A sealing plate 125 is movably attached to the top of 124, and a second elastic member 126 is provided between the sealing plate 125 and the material guide seat 121. When the sealing plate 125 completely blocks the discharge port at the bottom of the transition bin 123 under the action of the second elastic member 126, one end of the sealing plate 125 close to the material guide seat 121 is still overlapped on the upper surface of the inclined support 124, so that the inclined support 124 can support the sealing plate 125 to prevent the stainless steel pipe to be welded inside the transition bin 123 from leaking out;

[0056] The second elastic member 126 includes two inclined rods fixedly connected to the outside of the material guide seat 121 and a socket corresponding to the inclined rod opened on one side of the sealing plate 125. One end of the inclined rod is movably inserted into the corresponding socket. Straight springs fixedly connecting the sealing plate 125 and the material guide seat 121 are movably sleeved on the outside of the two inclined rods. When the sealing plate 125 completely blocks the discharge port at the bottom end of the transition bin 123, the straight springs are in a natural state, and the first inclined rod remains inserted into the socket at the corresponding position.

[0057] It should be noted that, in the process of reciprocating motion of the supporting part on the continuous welding mechanism 7, the sealing plate 125 is intermittently squeezed to allow the sealing plate 125 to move along the direction of the inclined rod toward the material guide seat 121 and compress the straight spring, thereby releasing the sealing state of the sealing plate 125 on the discharge port at the bottom end of the transition bin 123, allowing the two sections of pre-inserted and centered tube bodies at the bottom end of the transition bin 123 to fall onto the supporting part of the continuous welding mechanism 7, and while being pushed forward by the pushing part to complete the welding of the tube bodies, the elastic member 126 is used to push the sealing plate to block the transition bin 123, thereby preventing further leakage of material and waiting for the next round of reciprocating motion to leak material, push and weld again.

[0058] Specifically, Figure 5 and Figure 11-12As shown, the feeding pretreatment mechanism 9 includes a U-shaped frame 92 fixed on the outside of the material guide seat 121 and a material bin 91 fixed on the top of the base 10 and arranged obliquely, wherein a partition plate is arranged in the middle of the material storage end side of the material bin 91, which is used to classify and place the two sections of the pipe body to be welded in different directions, so as to facilitate the subsequent continuous automatic pre-plugging and centering, and a feeding port corresponding to the material bin 91 is opened on one side of the U-shaped frame 92, and a cylinder 2 94 fixed on the top of the base 10 is arranged inside the U-shaped frame 92, and a trapezoidal lifting block 96 is fixedly connected to the telescopic end of the cylinder 2 94, wherein the angle formed between the inclined surface at the top of the trapezoidal lifting block 96 and the vertical surface of the material guide seat 121 is an acute angle, so that the pipe body after pre-plugging and centering can automatically roll down to the inside of the transition bin 123 after being pushed upward to the corresponding position, and an adjustment component for adjusting the relative position of the two sections of the pre-plugged pipe body is arranged between the trapezoidal lifting block 96 and the U-shaped frame 92;

[0059] The adjustment component includes a guide platform 93 fixed on the inner top of one end of the U-shaped frame 92 and a cross slot 99 opened at the other end of the U-shaped frame 92, a cross seat 910 is slidably installed inside the cross slot 99, and a drive motor 3 is fixedly installed on one side of the cross seat 910. The adjustment component also includes an arc-shaped embedded groove 98 opened on the top of the trapezoidal lifting block 96 and an arc block 97 fixed on the top of the trapezoidal lifting block 96. A rubber roller 95 driven by the drive motor 3 is rotatably installed inside the arc-shaped embedded groove 98, wherein the arc block 97 and the rubber roller 95 have the same specifications as the part protruding from the arc-shaped embedded groove 98, so that the two sections of the pipe body entering the U-shaped frame 92 are in a coaxial state to ensure that the pre-insertion and centering process between the two sections of the pipe body is carried out smoothly.

[0060] It should be noted that, in the process of pre-insertion and centering of the two sections of the pipe to be welded, when the trapezoidal lifting block 96 moves to the position below the feed port under the action of the cylinder 94 (this state is intended to be set as the initial state of the trapezoidal lifting block 96), the pipes located in the two material chambers in the silo 91 roll down along the feed port to the inside of the U-shaped frame 92 under the action of their own gravity, and the two sections of the pipe are arranged coaxially under the action of the arc block 97 and the rubber roller 95. In this state, the pipes located at the top of the arc block 97 are Keeping the state of not rotating, the tube body at the top of the second rubber roller 95 rotates under the rotation of the second rubber roller 95, and as the second cylinder 94 pushes the trapezoidal lifting block 96 to move upward, the tube body at the top of the arc block 97 will gradually move toward the rotating tube body under the guidance and restriction of the guide platform 93, and adjust the relative position between the through hole 32 and the convex ring 33 at the opposite ends of the two sections of the tube body to be welded in coordination with the other section of the tube body that is continuously rotating, so that the two sections of the tube body to be welded can complete the pre-insertion centering in the process of moving upward;

[0061] That is, when the rising tube body moves to the vertical surface area of ​​the guide platform 93, the two sections of the tube body to be welded have just completed the pre-plugging and centering, and then continue to rise to the highest point of the material guide seat 121 to complete the autonomous unloading into the transition bin 123, wherein the length inside the transition bin 123 is equal to the total length of the two sections of the tube body after the pre-plugging and centering.

[0062] Specifically, Figure 5-6 As shown, the continuous welding mechanism 7 includes two slide grooves 1 71 opened on the surface of the carrier 11 and a slide groove 2 717 located between the two slide grooves 1 71, the two slide grooves 1 71 are slidably connected with a slide seat 72 inside, the slide groove 2 717 is slidably connected with a push seat 78 inside, and a horizontal plate 710 is fixedly arranged between the two slide seats 72, wherein the welding components corresponding to the two sections of stainless steel pipes are installed on the top of the horizontal plate 710, and the bottom of the horizontal plate 710 is fixedly provided with a bottom frame 77 sleeved on the outside of the push seat 78, and a cylinder 1 79 for pushing the push seat 78 to move is fixedly installed at one end of the carrier 11;

[0063] A vertical plate 711 fixed on the surface of the carrier frame 11 is disposed on the opposite side of the two slide seats 72. A limiting groove 712 is formed through one side of the two vertical plates 711. Both ends of the horizontal plate 710 are respectively inserted into the corresponding limiting grooves 712. A tooth plate 713 is fixed on the top of the two vertical plates 711. A trapezoidal guide block 714 fixed on the surface of the carrier frame 11 is disposed on the opposite side of the two vertical plates 711.

[0064] A bracket 73 is fixedly provided on the top of the two slides 72, and a blanking frame 74 is fixedly connected between the top surfaces of the two brackets 73, wherein the upper end surface of the blanking frame 74 is coplanar with the lower end surface of the inclined transition bin 123, and a supporting assembly 75 located between the two slides 72 is installed at the bottom of the blanking frame 74, and a top tightening assembly 76 is installed on the top of the two slides 72, wherein the distance between the two top tightening assemblies 76 in the initial state is greater than the sum of the lengths of the two sections of the pipe body that have been completely pre-inserted and centered, and is less than the distance between the two sections of the pipe body that are just separated. The sum of the lengths of the two sections of the tube body ensures that the two sections of the tube body that have completed the pre-plugging and centering will not completely break away from the pre-plugging and centering state after entering the supporting assembly 75. A tooth seat 715 corresponding to the supporting assembly 75 and a material lifting seat 716 located on both sides of the second slide groove 717 are also fixedly provided on the surface of the support frame 11. The tooth seat 715 and the material lifting seat 716 are provided with a through groove on the side facing the cross plate 710. The setting of the through groove can prevent the cross plate 710 from being obstructed during the upward process, thereby ensuring the smooth unloading process after welding is completed.

[0065] It should be noted that, in the process of welding the two sections of the pipe body to be welded after the pre-insertion and centering, when the cylinder 1 79 drives the push seat 78 to retract downward to the lowest point, the follow-up blanking frame 74 will push the sealing plate 125 at the bottom of the transition bin 123 to release the blocking state of the bottom end of the transition bin 123, so that the two sections of the pipe body to be welded inside the transition bin 123 pass through the blanking frame 74 and fall onto the supporting assembly 75, and then under the action of the cylinder 1 79, the supporting assembly 75 is pushed to support the two sections of the pipe body to be welded and move upward, and under the guidance of the two trapezoidal guide blocks 714, the two tightening assemblies 76 are used to tighten the two sections of the pipe body after the pre-insertion and centering, so that the opposite ends of the two sections of the pipe body are closely arranged;

[0066] When the two sections of the tube body that have been tightened pass through the area corresponding to the tooth plate 713 during the upward movement, the tightening assembly 76 will be driven to drive the tube body to be welded to rotate, and at the same time, the welding component will be started to start welding. The opening and closing of the welding state can be detected by installing an ultrasonic sensor on one of the trapezoidal guide blocks 714, that is, when the tightening assembly 76 begins to enter the area corresponding to the tooth plate 713, the welding is started, and conversely, when it just leaves the area corresponding to the tooth plate 713, the welding is closed. In addition, if no tube body is placed on the supporting assembly 75, the welding component will always remain in a closed state when the tightening assembly 76 passes through the area corresponding to the tooth plate 713.

[0067] After welding is completed, when the top tightening assembly 76 is transferred from the straight surface area on the trapezoidal guide block 714 to the high end (see Figure 6 ) When the inclined surface area returns, the two tightening components 76 will automatically release the clamping state of the tube body, and in the process of continuing to rise, the tube body on the supporting component 75 is lifted up by the lifting seat 16, and finally separated from the supporting component 75 to enter the buffer grinding station.

[0068] Specifically, Figure 6-8 As shown, the support assembly 75 includes a J-shaped plate 751 fixed to the bottom end of the blanking frame 74, and a T-shaped arc groove 752 corresponding to the tooth seat 715 is provided on the outer side of the J-shaped plate 751, and an arc-shaped through groove 755 connected to the T-shaped arc groove 752 is provided on the inner side of the J-shaped plate 751. A T-shaped arc plate 753 is slidably connected inside the T-shaped arc groove 752, and a rack 754 is fixed on the outer side of the T-shaped arc plate 753, wherein the rack 754 is completely exposed from the T-shaped arc groove 752, and when the support assembly 75 moves to the area where the tooth seat 715 is located, the rack 754 and the tooth seat 715 are in a meshing state, so that in the process of unloading after welding is completed, the tooth seat 715 will be used to drive the T-shaped arc plate 753 to shrink into the T-shaped arc groove 752, so that the unloading process is not blocked, and an elastic member 756 is provided inside the arc-shaped through groove 755;

[0069] The elastic member 756 includes a slider fixed at one end of the T-shaped arc plate 753, the slider is slidably connected to the inside of the arc groove 755, an arc rod that movably passes through the slider is fixed inside the arc groove 755, and an arc spring is sleeved on the outside of the arc rod. When the support assembly 75 deviates from the area where the tooth seat 715 is located, one end of the T-shaped arc plate 753 is pushed out of the T-shaped arc groove 752 under the action of the arc spring, so as to prevent the tube body from detaching from the J-shaped plate 851 and affecting the subsequent welding process when the tube body to be welded rolls onto the J-shaped plate 751.

[0070] It should be noted that in the process of the tube body to be welded inside the transition bin 123 falling onto the supporting assembly 75 through the blanking frame 74, since the lower supporting assembly 75 and the tooth seat 715 are separated from each other in this state, one end of the T-shaped arc plate 753 extends out of the T-shaped arc groove 752 under the action of the elastic member 756, and cooperates with the inclined setting state of the J-shaped plate 751 to ensure that the fallen tube body will not slip off the supporting assembly 75. After the supporting assembly 75 supports the tube body to move upward to complete the welding, when passing through the area where the tooth seat 715 is located, the tooth seat 715 is used to drive the T-shaped arc plate 753 to retract into the T-shaped arc groove 752, and with the assistance of the lifting seat 716, the welded tube body is lifted up, and finally enters the buffer grinding station under the guidance of the inclined surface of the lifting seat 716 away from the supporting assembly 75.

[0071] Specifically, Figure 6 and Fig. 9 As shown, the tightening assembly 76 includes a circular hole opened on the corresponding slide 72 and a sleeve 761 inserted into the circular hole. A ring block 762 and a gear 763 are fixedly sleeved on the outer side of the sleeve 761. A ring groove matching the ring block 762 is opened on the inner side of the circular hole to ensure that the sleeve 761 will not move in the axial direction during the synchronous movement with the slide 72.

[0072] A round rod 764 is sleeved through the inside of the sleeve 761, and a limit strip 766 and a retaining ring 765 are fixedly provided at both ends of the outer side of the round rod 764, and a strip groove matching the limit strip 766 is opened at one end of the inner side of the sleeve 761. A hemisphere 767 is fixedly provided at the end of the round rod 764 away from the retaining ring 765, so as to better tighten and position the inner tube 2 of the tube body. A spring 768 is sleeved on the outer side of the round rod 764 for fixing the retaining ring 765 and the corresponding slide seat 72. When the spring 768 is in a natural state, the limit strip 766 on the outer side of the round rod 764 is just completely embedded in the corresponding strip groove. When the round rod 764 moves toward the direction of the tube body and presses under the guidance of the trapezoidal guide block 714, the limit strip 766 will never separate from the corresponding strip groove.

[0073] It should be noted that, in the process of using the two pressing assemblies 76 to press the pipe body to be welded that falls on the supporting assembly 75, since the distance between the two pressing assemblies 76 in the initial state is greater than the sum of the lengths of the two sections of the pipe body that have completely completed the pre-insertion centering, and at the same time is less than the sum of the lengths of the two sections of the pipe body that are just in the separated state, the pre-insertion state between the two sections of the pipe body that have completed the pre-insertion centering will loosen after entering the supporting assembly 75, but will not completely break away from the pre-insertion centering state. At this time, the slide 72 moves upward under the push of the cylinder 79, and the opposite ends of the two round rods 764 will be at the lower end on the corresponding trapezoidal guide block 714 (refer to Figure 6 ) The two round rods 764 move toward each other under the guidance of the inclined surface, so that the retaining ring 765 compresses the corresponding spring 768 synchronously, and the hemispheres 767 at the ends of the two round rods 764 move toward the tube body at the same time and press tight, that is, when the pressing assembly 76 moves to the area where the straight surface on the trapezoidal guide block 714 is located, the maximum pressing state is reached;

[0074] Similarly, after the clamping assembly 76 switches from the straight surface area on the trapezoidal guide block 714 to the high end inclined surface area on the trapezoidal guide block 714, the two round rods 764 move inward under the restoring force of the corresponding springs 768, releasing the clamping state of the welded pipe body and facilitating subsequent unloading.

[0075] Example 2

[0076] Refer to the instruction manual Figure 4 and Fig.10 A production welding device for a pressure-resistant and heat-insulating stainless steel pipe according to an embodiment of the present invention comprises a base 10, a carrier frame 11 is fixedly arranged on the top of the base 10, a buffer grinding mechanism 8 for grinding the welding area of ​​two sections of the pipe body after welding is installed on the other side of the top of the carrier frame 11, the buffer grinding mechanism 8 comprises two side baffles 81 fixed on the surface of the carrier frame 11, a deflection seat 82 is rotatably installed between the opposite sides of the two side baffles 81, wherein the deflection seat 82 can be made of rubber material, and can buffer and decelerate the rolling welding pipe body, and a grinding part is installed on the end of the side baffle 81 away from the continuous welding mechanism 7;

[0077] The grinding part includes a mounting frame 83 fixed on the surface of the carrier frame 11, and a shaft rod corresponding to the mounting frame 83 is rotatably installed between the two side baffles 81, and a servo motor driving the shaft rod to rotate is fixedly installed on one side of the mounting frame 83;

[0078] Four straight plates 84 evenly distributed in an annular shape are fixedly provided at the middle of the outer side of the shaft rod 1. Roller grooves and machine grooves are provided through the straight plates 84. A rubber roller 85 is rotatably installed inside the roller groove. A driving motor 1 for driving the rubber roller 85 is installed inside the machine groove. The driving motor 1 drives the rubber roller 85 to rotate, so that the tube body located between two adjacent straight plates 84 is driven to rotate. Four straight strips 86 evenly distributed in an annular shape are fixedly provided at both ends of the outer side of the shaft rod 1. The straight strips 86 are located on the angular bisector between the corresponding two adjacent straight plates 84. Convex rods 87 are fixedly provided on the opposite side of the straight strips 86 at both ends of the shaft rod 1.

[0079] The grinding part also includes a straight through groove 813 opened in the middle of the surface of the carrier 11, and the surface of the carrier 11 is also provided with a vertical groove 88 and a cross groove 89 located at both ends of the straight through groove 813, and the two cross grooves 89 are movably sleeved with a cross seat 810 inside, and a shaft rod 2 is rotatably installed between the bottom ends of the two cross seats 810, and a driving motor 2 for driving the shaft rod 2 to rotate is fixedly installed on one side of one of the cross seats 810, and a grinding roller 812 is fixedly sleeved on the middle part of the outer side of the shaft rod 2;

[0080] A top block 811 is movably inserted inside the two vertical grooves 88, and the two top blocks 811 are movably sleeved on the outer side of the second shaft rod. Trapezoidal guide grooves 814 are opened on the opposite sides of the two cross seats 810, and protrusions for limiting the sinking amount of the cross seat 810 are fixed on the outer side of the two cross seats 810.

[0081] It should be noted that, in the process of the welded tube body moving along the ejection seat 716 toward the buffer grinding station, the rolled tube body will first contact the deflection seat 82, and use the impulse of the tube body rolling to impact the deflection seat 82, so that the deflection seat 82 buffers and decelerates the rolled tube body, so that the tube body passing the deflection seat 82 approaches the grinding position at a lower speed. It should be further noted here that before the tube body moves to the grinding position, one of the straight plates 84 is always kept perpendicular to the upper horizontal plane of the carrier frame 11, that is, the angle between one of the straight bars 86 and the upper horizontal plane of the carrier frame 11 is 45°;

[0082] When the decelerated tube body contacts the low straight plate 84 which is perpendicular to the upper horizontal plane of the carrier frame 11, the servo motor can be used to drive the shaft rod 1 to rotate 45 degrees, so that the straight bar 86 which is at an angle of 45 degrees to the upper horizontal plane of the carrier frame 11 is perpendicular to the upper horizontal plane of the carrier frame 11. In this process, as the straight bar 86 which is at an angle of 45 degrees to the upper horizontal plane of the carrier frame 11 gradually switches to a state perpendicular to the upper horizontal plane of the carrier frame 11, the convex rod 87 on the outer side of the corresponding straight bar 86 will first enter the corresponding side inclined section of the trapezoidal guide groove 814, and as the straight bar 86 swings, the convex rod 87 which swings synchronously with the straight bar 86 will squeeze the corresponding inclined surface in the trapezoidal guide groove 814, thereby driving the two cross seats 1 810 to move upward, and driving the shaft rod 2 to move upward, so that the grinding roller 812 and the top block 811 rise synchronously. At this time, the position of the tube body after buffer deceleration can also be detected by an ultrasonic sensor.

[0083] The rising grinding roller 812 will pass through the straight groove 813 on the top of the carrier 11 as the cross seat 810 moves upward, and contact the pipe at the corresponding position. The rubber roller 95 on the straight plate 84 can be used to drive the pipe body to rotate, and the rotation direction of the grinding roller 812 is opposite to the rotation direction of the pipe body, so as to complete the grinding of the area where the welding surface is located to remove welding slag and polish the welding surface, and the rising top block 811 will use the inclined surface of its top to squeeze the pipe body, so as to use the two top blocks 811 to limit the two ends of the pipe body, so as to ensure the smooth progress of the grinding process;

[0084] After grinding is completed, the servo motor is continued to drive the shaft to rotate 45° to allow the polished tube to exit the grinding station. During this process, the cross seat 810 and the top block 811 return to the state where the straight plate 84 is perpendicular to the upper horizontal plane of the carrier frame 11, waiting for the next round of grinding.

[0085] In the above technical scheme, the cylinder mentioned is a multi-section telescopic cylinder of the DSTA-3S series, and the specific selection is made according to the equipment requirements; the drive motor mentioned is an AC asynchronous motor of model YB2-63M1-2; the servo motor mentioned is a servo driver of model JSMA-PUC02D; the ultrasonic sensor mentioned is a microsonic ultrasonic sensor of model MIC+130 / D / TC.

[0086] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A pressure-resistant and heat-insulating stainless steel pipe, comprising a pipe body, characterized in that: The tube body is composed of an outer tube (1), an inner tube (2) and a frame (3) fixed between the inner tube (2) and the outer tube (1); a vacuum cavity (4) is provided between the inner and outer annular surfaces of the outer tube (1) and the inner tube (2); the inner side of the vacuum cavity (4) is coated with a thermal insulation coating (5); one end of the outer tube (1) and the inner tube (2) is provided with a gas nozzle (6) connected to the vacuum cavity (4); The skeleton (3) comprises two sealing rings (31) and a plurality of supporting rings (35) located between the two sealing rings (31); a plurality of straight rods (34) evenly distributed in an annular shape are fixedly connected between the two sealing rings (31); the supporting rings (35) are fixed on the outside of the straight rods (34); both sealing rings (31) are provided with through holes (32); a convex ring (33) corresponding to the through hole (32) is fixedly provided on the outside of one of the sealing rings (31); and a connecting opening (36) is provided on the outside of the supporting ring (35) at a position between two adjacent straight rods (34).

2. A production welding device for a pressure-resistant and heat-insulating stainless steel pipe, which uses a production welding device to weld two adjacent sections of the pressure-resistant and heat-insulating stainless steel pipe as claimed in claim 1, characterized in that: It comprises a base (10), a carrier frame (11) is fixedly provided on the top of the base (10), and a continuous welding mechanism (7) for welding two sections of pre-plugged pipe bodies and a buffer grinding mechanism (8) for grinding the welding area of ​​the two sections of pipe bodies after welding are respectively installed on both sides of the top of the carrier frame (11); An intermittent feeding mechanism (12) for uninterrupted automatic feeding is fixedly installed on one end of the top of the base (10) close to the continuous welding mechanism (7).

3. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipe according to claim 2 is characterized in that: The intermittent feeding mechanism (12) comprises two vertical frames (122) fixed on the top of the base (10), a transition bin (123) is fixedly provided between the top ends of the two vertical frames (122) on opposite sides, a notch groove is provided on one side of the transition bin (123), a material guide seat (121) is fixedly provided at a position corresponding to the notch groove on the top of the base (10), an inclined support (124) is fixedly provided on one side of the material guide seat (121), a sealing plate (125) is movably fitted on the top of the inclined support (124), and a second elastic member (126) is provided between the sealing plate (125) and the material guide seat (121); The second elastic member (126) comprises two inclined rods fixedly connected to the outside of the material guide seat (121) and a socket corresponding to the inclined rods, which is opened on one side of the sealing plate (125); one end of the inclined rod is movably inserted into the corresponding socket; and the outsides of the two inclined rods are movably sleeved with straight springs fixedly connecting the sealing plate (125) and the material guide seat (121).

4. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipe according to claim 2 is characterized in that: The continuous welding mechanism (7) comprises two slide grooves (71) provided on the surface of the carrier (11) and a slide groove (717) located between the two slide grooves (71); the two slide grooves (71) are slidably connected with a slide seat (72) inside; the slide groove (717) is slidably connected with a push seat (78) inside; a horizontal plate (710) is fixedly provided between the two slide seats (72) and a bottom frame (77) sleeved on the outside of the push seat (78) is fixedly provided at the bottom of the horizontal plate (710); and a cylinder (79) is fixedly installed at one end of the carrier (11) for pushing the push seat (78) to move; A vertical plate (711) fixed on the surface of the carrier frame (11) is provided on the opposite side of the two slide seats (72); a limiting groove (712) is provided through one side of the two vertical plates (711); two ends of the horizontal plate (710) are respectively inserted into the corresponding limiting grooves (712); a tooth plate (713) is fixed on the top of the two vertical plates (711); and a trapezoidal guide block (714) fixed on the surface of the carrier frame (11) is provided on the opposite side of the two vertical plates (711); A bracket (73) is fixedly provided on the top of the two slides (72), a blanking frame (74) is fixedly connected between the top surfaces of the two brackets (73), a supporting assembly (75) located between the two slides (72) is installed at the bottom of the blanking frame (74), and a tightening assembly (76) is installed on the top of the two slides (72). A tooth seat (715) corresponding to the supporting assembly (75) and a material ejection seat (716) located on both sides of the second slide groove (717) are also fixedly provided on the surface of the carrier frame (11), and a through groove is provided on the side of the tooth seat (715) and the material ejection seat (716) facing the horizontal plate (710).

5. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipe according to claim 4 is characterized in that: The support assembly (75) comprises a J-shaped plate (751) fixed to the bottom end of the blanking frame (74); a T-shaped arc groove (752) corresponding to the gear seat (715) is provided on the outer side of the J-shaped plate (751); an arc-shaped through groove (755) connected to the T-shaped arc groove (752) is provided on the inner side of the J-shaped plate (751); a T-shaped arc plate (753) is slidably connected inside the T-shaped arc groove (752); a rack (754) is fixedly provided on the outer side of the T-shaped arc plate (753); and an elastic member (756) is provided inside the arc-shaped through groove (755); The elastic member 1 (756) comprises a slider fixed at one end of the T-shaped arc plate (753), the slider being slidably connected to the inside of the arc-shaped through groove (755), an arc rod movably penetrating the slider being fixed inside the arc-shaped through groove (755), and an arc spring being sleeved on the outside of the arc rod.

6. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipe according to claim 4 is characterized by: The tightening assembly (76) comprises a circular hole formed on the corresponding slide seat (72) and a sleeve (761) passing through the circular hole; a ring block (762) and a gear (763) are fixedly sleeved on the outer side of the sleeve (761); and a ring groove matching the ring block (762) is formed on the inner side of the circular hole; A round rod (764) is sleeved through the inside of the sleeve (761), and a limit strip (766) and a retaining ring (765) are fixedly provided at both ends of the outer side of the round rod (764), a groove matching the limit strip (766) is provided at one end of the inner side of the sleeve (761), a hemisphere (767) is fixedly provided at one end of the round rod (764) away from the retaining ring (765), and a spring (768) is sleeved on the outer side of the round rod (764) for fixedly connecting the retaining ring (765) and the corresponding slide seat (72).

7. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipe according to claim 2 is characterized by: The buffer grinding mechanism (8) comprises two side baffles (81) fixed on the surface of the carrier (11), a deflection seat (82) is rotatably installed between the opposite sides of the two side baffles (81), and a grinding part is installed at one end of the side baffle (81) away from the continuous welding mechanism (7).

8. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipe according to claim 7 is characterized in that: The grinding part comprises a mounting frame (83) fixed on the surface of the carrier frame (11), a shaft rod corresponding to the mounting frame (83) is rotatably installed between the two side baffles (81), and a servo motor for driving the shaft rod to rotate is fixedly installed on one side of the mounting frame (83); Four straight plates (84) evenly distributed in an annular shape are fixedly provided at the middle part of the outer side of the shaft rod, a roller groove and a machine groove are penetrated through the straight plate (84), a rubber roller (85) is rotatably installed inside the roller groove, and a driving motor (85) is installed inside the machine groove to drive the rubber roller (85) to rotate, four straight bars (86) evenly distributed in an annular shape are fixedly provided at both ends of the outer side of the shaft rod, and the straight bars (86) are located on the bisector of the angle between the corresponding two adjacent straight plates (84), and convex rods (87) are fixedly provided on the opposite side of the straight bars (86) at both ends of the shaft rod; The grinding section also includes a straight-through groove (813) provided in the middle of the surface of the carrier (11), and a vertical groove (88) and a cross groove (89) located at both ends of the straight-through groove (813) are also provided on the surface of the carrier (11), a cross seat (810) is movably sleeved inside the two cross grooves (89), a shaft rod (810) is rotatably installed between the bottom ends of the two cross seats (810), a driving motor (810) for driving the shaft rod (810) is fixedly installed on one side of one of the cross seats (810), and a grinding roller (812) is fixedly sleeved on the middle of the outer side of the shaft rod (810); A top block (811) is movably inserted into the two vertical grooves (88), and the two top blocks (811) are movably sleeved on the outer side of the second shaft rod. Trapezoidal guide grooves (814) are provided on the opposite sides of the two cross seats (810), and protrusions for limiting the sinking amount of the cross seat (810) are fixedly provided on the outer sides of the two cross seats (810).

9. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipe according to claim 3 is characterized by: The top of the base (10) is also provided with a feeding pretreatment mechanism (9) corresponding to the intermittent feeding mechanism (12), the feeding pretreatment mechanism (9) comprising a U-shaped frame (92) fixed on the outside of the material guide seat (121) and a material bin (91) fixed on the top of the base (10), and a feeding port corresponding to the material bin (91) is opened on one side of the U-shaped frame (92); The U-shaped frame (92) is provided with a second cylinder (94) fixed on the top of the base (10), the telescopic end of the second cylinder (94) is fixedly connected with a trapezoidal lifting block (96), and an adjustment component for adjusting the relative position of the two pre-connected pipe bodies is provided between the trapezoidal lifting block (96) and the U-shaped frame (92).

10. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipes according to claim 9, characterized in that: The adjustment assembly comprises a guide platform (93) fixed to the top of the inner side of one end of the U-shaped frame (92) and a cross slot (99) provided at the other end of the U-shaped frame (92), a cross seat (910) being slidably mounted inside the cross slot (99), and a driving motor (3) being fixedly mounted on one side of the cross seat (910); The adjustment assembly also includes an arc-shaped embedded groove (98) opened on the top of the trapezoidal lifting block (96) and an arc block (97) fixed on the top of the trapezoidal lifting block (96). A rubber roller 2 (95) driven to rotate by a driving motor 3 is rotatably installed inside the arc-shaped embedded groove (98).

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