An anti-pressure and heat-insulating stainless steel pipe and its production and welding equipment

Abstract

The present invention relates to the technical field of pipe production and welding, specifically a compression-resistant and heat-insulating stainless steel pipe and its production and welding equipment. The stainless steel pipe of the present invention includes a pipe body, which is composed of an outer pipe, an inner pipe, and a skeleton fixedly arranged between the inner pipe and the outer pipe. Vacuum cavities are provided between the inner and outer circumferential surfaces of the outer pipe and the inner pipe, and a heat-insulating coating is applied to the inner side of the vacuum cavity. This stainless steel pipe can achieve multiple heat insulation and compression resistance. The production and welding equipment of the present invention includes a base, on the top of which a carrier is fixedly arranged. On both sides of the top of the carrier, a continuous welding mechanism for welding two pre-inserted pipe bodies and a buffer grinding mechanism for grinding the welding area of the two welded pipe bodies are respectively installed. This production and welding device can achieve continuous welding processing, and can also complete the grinding processing of the welding surface during the unloading process, achieving the purpose of multi-purpose use of one machine.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe production and welding, and specifically relates to a compression-resistant and heat-insulating stainless steel pipe and its production and welding equipment. Background Art

[0002] Stainless steel pipes are hollow long round steel materials, mainly widely used in industrial conveying pipelines such as petroleum, chemical industry, medical treatment, food, light industry, and mechanical instruments, as well as mechanical structure components, etc. Traditional stainless steel pipes often suffer from local depressions due to being unable to withstand pressure during use, making the pipe fittings prone to damage, thereby reducing the service life of the stainless steel pipe fittings. In addition, during the laying of a relatively long pipeline, it is usually necessary to weld the steel pipes so that the pipeline can continue to extend.

[0003] The prior art discloses a Chinese patent with the publication number CN 116352361 A: a stainless steel pipe welding device, and discloses a clamping mechanism. The servo motor drives two clamping frames to slide towards each other on the carrier through a transmission component, so that the clamping component clamps and fixes the stainless steel pipe to avoid the situation of the stainless steel pipe shaking during welding.

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

[0005] The purpose of the present invention is to provide a compression-resistant and heat-insulating stainless steel pipe and its production and welding equipment to solve the problems raised in the above background art.

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

[0007] A compression-resistant and heat-insulating stainless steel pipe, including 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. Vacuum cavities are opened between the inner and outer circumferential surfaces of the outer pipe and the inner pipe, and a heat-insulating coating is coated on the inner side of the vacuum cavity. Gas nozzles communicating with the vacuum cavity are installed at one end of both the outer pipe and the inner pipe;

[0008] The framework includes two sealing rings and a plurality of support 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 support rings are fixed on the outer sides of the straight rods. Through holes are opened on both sealing rings. A convex ring corresponding to the through hole is fixedly arranged on the outer side of one of the sealing rings. Communication ports are opened at positions between adjacent straight rods on the outer sides of the support rings.

[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 blank supporting assembly includes a J-shaped plate fixed to the bottom end of the blanking frame. On the outer side of the J-shaped plate, a T-shaped arc groove corresponding to the tooth seat is provided. On the inner side of the J-shaped plate, an arc-shaped through groove communicating with the T-shaped arc groove is provided. A T-shaped arc plate is slidably connected inside the T-shaped arc groove. A rack is fixedly provided on the outer side of the T-shaped arc plate. An elastic member I is provided inside the arc-shaped through groove.

[0017] The elastic member I includes a slider fixed to one end of the T-shaped arc plate. The slider is slidably connected inside the arc-shaped through groove. An arc rod that movably penetrates the slider is fixedly provided inside the arc-shaped through groove. An arc-shaped spring is sleeved on the outer side of the arc rod.

[0018] In a preferred embodiment, the pressing component includes a round hole provided in the corresponding sliding seat and a sleeve penetrated inside the round hole. A ring block and a gear are fixedly sleeved on the outer side of the sleeve. A ring groove adapted to the ring block is provided inside the round hole.

[0019] A round rod is penetrated and sleeved inside the sleeve. A limiting strip and a retaining ring are respectively fixedly provided at both ends of the outer side of the round rod. A strip groove adapted to the limiting strip is provided 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 fixedly connecting the retaining ring and the corresponding sliding seat is sleeved on the outer side of the round rod.

[0020] In a preferred embodiment, the buffering and grinding mechanism includes two side baffles fixed on the surface of the carrier. A swing seat is rotatably installed between the opposite sides of the two side baffles. 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. A first shaft rod corresponding to the mounting frame is rotatably installed in a penetrating manner between the two side baffles. A servo motor for driving the first shaft rod to rotate is fixedly installed on one side of the mounting frame.

[0022] Four straight plates evenly distributed in a ring are fixedly provided in the middle of the outer side of the first shaft rod. A roller groove and a machine groove are penetratedly provided on the straight plates. A first rubber roller is rotatably installed inside the roller groove. A first driving motor for driving the first rubber roller to rotate is installed inside the machine groove. Four straight bars evenly distributed in a ring are fixedly provided at both ends of the outer side of the first shaft rod. And the straight bars are located on the angular bisectors between the corresponding adjacent two straight plates. Convex rods are fixedly provided on the opposite sides of the straight bars at both ends of the first shaft rod.

[0023] The grinding part further includes a straight through groove provided in the middle of the surface of the carrier. Vertical grooves and first cross grooves are further provided on the surface of the carrier at both ends of the straight through groove. A first cross seat is movably sleeved inside each of the two first cross grooves. A second shaft rod is rotatably installed between the bottom ends of the two first cross seats. A second driving motor for driving the second shaft rod to rotate is fixedly installed on one side of one of the first cross seats. A grinding roller is fixedly sleeved in the middle of the outer side of the second shaft rod.

[0024] Two top blocks are movably inserted into the two vertical slots respectively. Both top blocks are movably sleeved on the outer side of the second shaft rod. Trapezoidal guide grooves are formed on the opposite sides of the two first cross seats, and bumps for limiting the sinking amount of the first cross seats are fixedly arranged on the outer sides of the two first cross seats.

[0025] In a preferred embodiment, a feeding pretreatment mechanism corresponding to the intermittent feeding mechanism is further arranged on the top of the base. The feeding pretreatment mechanism includes a U-shaped frame fixed on the outer side of the material guiding seat and a material bin fixed on the top of the base. A feeding port corresponding to the material bin is formed on one side of the U-shaped frame.

[0026] A second cylinder fixed on the top of the base is arranged inside the U-shaped frame. The telescopic end of the second cylinder is fixedly connected with a trapezoidal lifting block, and an adjusting assembly for adjusting the relative positions of the two pre-inserted pipe bodies is arranged between the trapezoidal lifting block and the U-shaped frame.

[0027] In a preferred embodiment, the adjusting assembly includes a guiding platform fixed on the inner top of one end of the U-shaped frame and a second cross slot formed on the other end of the U-shaped frame. A second cross seat is slidably installed inside the second cross slot, and a third driving motor is fixedly installed on one side of the second cross seat.

[0028] The adjusting assembly further includes an arc-shaped embedding groove formed on the top of the trapezoidal lifting block and an arc-shaped block fixed on the top of the trapezoidal lifting block. A second rubber roller driven by the third driving motor to rotate is rotatably installed inside the arc-shaped embedding groove.

[0029] The beneficial effects of the present invention are as follows:

[0030] 1. The present invention can form a multi-layer heat preservation structure by means of the vacuum cavities pumped to the vacuum state on the inner pipe and the outer pipe and the heat preservation coating inside the vacuum cavities, and at the same time, cooperate with the inert protective gas filled in the skeleton placement area between the inner pipe and the outer pipe. Meanwhile, a multi-layer compressive structure is formed by the vacuum cavities pumped to the vacuum state on the inner pipe and the outer pipe and the skeleton in the skeleton placement area filled with inert protective gas between the inner pipe and the outer pipe, so as to improve the overall heat preservation and compressive performance.

[0031] 2. The present invention controls the intermittent discharging of the transition bin by using the continuous welding mechanism that reciprocates, realizes the continuous automatic feeding, welding and discharging of the stainless steel pipe, improves the production and welding efficiency, and can also complete the grinding process of the welding surface during the discharging process, achieving the purpose of multi-purpose use of one machine.

[0032] 3. The present invention can automatically pre-insert and center the two pipe bodies before welding through the feeding pretreatment mechanism, laying a foundation for the subsequent continuous automatic welding, which is convenient and practical. Description of the Drawings

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings;

[0034] Figure 1 is the overall structural schematic diagram of the compression-resistant and heat-insulating stainless steel pipe of the present invention;

[0035] Figure 2 is the partial structural sectional view of the outer pipe of the compression-resistant and heat-insulating stainless steel pipe of the present invention;

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

[0037] Figure 4 is the overall structural schematic diagram of the first perspective of the production welding equipment of the present invention;

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

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

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

[0041] Figure 8 is the second perspective structural schematic diagram of the material supporting part of the continuous welding mechanism of the production welding equipment of the present invention;

[0042] Figure 9 is the structural schematic diagram of the top pressing component of the continuous welding mechanism of the present invention;

[0043] Figure 10 is the structural schematic diagram of the buffer grinding mechanism of the production welding equipment of the present invention;

[0044] Figure 11 is the structural schematic diagram of the feeding pretreatment mechanism of the production welding equipment of the present invention;

[0045] Figure 12 is the structural schematic diagram of the intermittent feeding mechanism of the production welding equipment of the present invention.

[0046] The reference numerals in the figures are as follows: 1, outer tube; 2, inner tube; 3, skeleton; 31, sealing ring; 32, perforation; 33, convex ring; 34, straight rod; 35, support ring; 36, communication port; 4, vacuum chamber; 5, thermal insulation coating; 6, air nozzle; 7, continuous welding mechanism; 71, first chute; 72, sliding seat; 73, bracket; 74, blanking frame; 75, blank holder assembly; 751, J-shaped plate; 752, T-shaped arc groove; 753, T-shaped arc plate; 754, rack; 755, arc-shaped through groove; 756, first elastic member; 76, pressing assembly; 761, sleeve; 762, ring block; 763, gear; 764, round rod; 765, retaining ring; 766, limiting strip; 767, hemisphere; 768, spring; 77, chassis; 78, pushing seat; 79, first cylinder; 710, cross plate; 711, vertical plate; 712, limiting groove; 713, toothed plate; 714, trapezoidal guide block; 715, toothed seat; 716, blank pushing seat; 717, second chute; 8, buffer and grinding mechanism; 81, side baffle; 82, swing seat; 83, mounting frame; 84, straight plate; 85, first rubber roller; 86, straight bar; 87, convex rod; 88, vertical groove; 89, first cross groove; 810, first cross seat; 811, top block; 812, grinding roller; 813, straight through groove; 814, trapezoidal guide groove; 9, feeding pretreatment mechanism; 91, bin; 92, U-shaped frame; 93, guiding platform; 94, second cylinder; 95, second rubber roller; 96, trapezoidal lifting block; 97, arc block; 98, arc-shaped embedding groove; 99, second cross groove; 910, second cross seat; 10, base; 11, bearing frame; 12, intermittent feeding mechanism; 121, material guiding seat; 122, vertical frame; 123, transition bin; 124, inclined support; 125, sealing plate; 126, second elastic member. Detailed implementation manners

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

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

[0049] Refer to the attached drawings of the specification Figures 1-3, A compression-resistant and heat-insulating stainless steel pipe according to an embodiment of the present invention includes a pipe body, which is composed of an outer pipe 1, an inner pipe 2, and a framework 3 fixedly arranged between the inner pipe 2 and the outer pipe 1. Vacuum cavities 4 are provided between the inner and outer circumferential surfaces of the outer pipe 1 and the inner pipe 2, and a heat-insulating coating 5 is coated on the inner side of the vacuum cavity 4. Nozzles 6 communicating with the vacuum cavity 4 are installed at one end of both the outer pipe 1 and the inner pipe 2;

[0050] The framework 3 includes two sealing rings 31 and a plurality of support rings 35 located between the two sealing rings 31. A plurality of straight rods 34 evenly distributed in a ring shape are fixedly connected between the two sealing rings 31. The support rings 35 are fixed on the outer sides of the straight rods 34. Through holes 32 are provided on both the two sealing rings 31. A convex ring 33 corresponding to the through hole 32 is fixedly arranged on the outer side of one of the sealing rings 31. Among them, both the through hole 32 and the convex ring 33 are arranged in a frustum shape, which is convenient for quickly completing the pre-insertion and centering between two sections of pipe bodies during the welding process of adjacent two sections of pipe bodies. A communication port 36 is provided at a position between adjacent two straight rods 34 on the outer side of the support ring 35. The communication port 36 can be used to quickly fill the placement area of the framework 3 with gas during the process of filling the placement area of the framework 3 between the inner pipe 2 and the outer pipe 1 with inert protective gas, so as to improve the heat-insulating performance between the inner pipe 2 and the outer pipe 1. At the same time, it can also cooperate with the framework 3 to further improve the overall compression resistance of the stainless steel pipe.

[0051] It should be noted that the compression-resistant and heat-insulating stainless steel pipe of the present invention forms a multi-layer heat-insulating structure by using the vacuum cavities 4 evacuated to a vacuum state on the inner pipe 2 and the outer pipe 1 and the heat-insulating coating 5 inside the vacuum cavity 4 to cooperate with the inert protective gas filled in the placement area of the framework 3 between the inner pipe 2 and the outer pipe 1, so as to improve the overall heat-insulating performance of the stainless steel pipe. In addition, it also uses the vacuum cavities 4 evacuated to a vacuum state on the inner pipe 2 and the outer pipe 1 and the placement area of the framework 3 filled with inert protective gas between the inner pipe 2 and the outer pipe 1 to cooperate with the framework 3 to improve the overall compression resistance of the stainless steel pipe.

[0052] Embodiment 1

[0053] Refer to the attached drawings of the specification Figures 4-5 , A production welding device for a compression-resistant and heat-insulating stainless steel pipe according to an embodiment of the present invention. This production welding device is used to weld adjacent two sections of pipe bodies of the above-mentioned compression-resistant and heat-insulating stainless steel pipe, and includes a base 10. A bearing frame 11 is fixedly arranged on the top of the base 10. A continuous welding mechanism 7 for welding two pre-inserted pipe bodies is installed on one side of the top of the bearing frame 11. An intermittent feeding mechanism 12 for uninterrupted automatic feeding is fixedly installed at one end of the top of the base 10 close to the continuous welding mechanism 7. A feeding pre-treatment 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 Figure 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 Figures 11-12As shown in the figure, the feeding and preprocessing mechanism 9 includes a U-shaped frame 92 fixed outside the material guiding seat 121 and a hopper 91 fixed on the top of the base 10 and inclined. Among them, a partition plate is arranged in the middle of the storage end side of the hopper 91 to classify and place the two pipe bodies to be welded according to their different installation orientations, which is convenient for subsequent continuous automatic pre-insertion centering. An inlet corresponding to the hopper 91 is opened on one side of the U-shaped frame 92. Inside the U-shaped frame 92, there is a cylinder two 94 fixed on the top of the base 10. The end of the telescopic end of the cylinder two 94 is fixedly connected with a trapezoidal lifting block 96. Among them, the included angle formed between the inclined surface at the top of the trapezoidal lifting block 96 and the vertical surface of the material guiding seat 121 is an acute angle, so that after the pre-inserted and centered pipe body is pushed upward to the corresponding position, it can automatically roll into the transition bin 123. A adjusting component is arranged between the trapezoidal lifting block 96 and the U-shaped frame 92 to adjust the relative positions of the two pre-inserted pipe bodies;

[0059] The adjusting component includes a guiding platform 93 fixed on the inner top of one end of the U-shaped frame 92 and a cross slot two 99 opened on the other end of the U-shaped frame 92. A cross seat two 910 is slidably installed inside the cross slot two 99. A driving motor three is fixedly installed on one side of the cross seat two 910. The adjusting component also includes an arc-shaped embedding 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 two 95 driven by the driving motor three is rotatably installed inside the arc-shaped embedding groove 98. Among them, the specifications of the arc block 97 and the part of the rubber roller two 95 protruding from the arc-shaped embedding groove 98 are the same, so that the two pipe bodies entering the U-shaped frame 92 are in a coaxial state, ensuring the smooth progress of the pre-insertion centering process between the two pipe bodies.

[0060] It should be noted that during the process of pre-insertion centering of the two pipe bodies to be welded, when the trapezoidal lifting block 96 just moves to a position below the inlet (it is assumed that this state is the initial state of the trapezoidal lifting block 96) under the action of the cylinder two 94, the pipe bodies in the two material cavities in the hopper 91 roll into the U-shaped frame 92 along the inlet under their own gravity, and the two pipe bodies are coaxially arranged under the action of the arc block 97 and the rubber roller two 95. In this state, the pipe body located on the top of the arc block 97 remains stationary, while the pipe body located on the top of the rubber roller two 95 rotates under the rotation of the rubber roller two 95. As the cylinder two 94 pushes the trapezoidal lifting block 96 to move upward, the pipe body located on the top of the arc block 97 will gradually move towards the rotating pipe body under the guiding and restricting action of the guiding platform 93, and cooperate with the continuously rotating other pipe body to adjust the relative positions between the perforations 32 and the convex rings 33 at the relative ends of the two pipe bodies to be welded, so that the two pipe bodies to be welded complete the pre-insertion centering during the upward movement;

[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, Figures 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 during the welding process of the two pipe bodies to be welded after pre-insertion centering, when the cylinder 1 79 drives the push seat 78 to retract downward to the lowest point, the blanking frame 74 in follow-up motion 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 pipe bodies to be welded inside the transition bin 123 fall onto the material supporting assembly 75 through the blanking frame 74. Then, under the action of the cylinder 1 79, the material supporting assembly 75 is pushed to hold the two pipe bodies to be welded and move upward. Under the guidance of the two trapezoidal guide blocks 714, the two tightening assemblies 76 are used to tighten the two pipe bodies after pre-insertion centering, so that the relative ends of the two pipe bodies are closely arranged;

[0066] When the two pipe bodies after tightening pass through the area corresponding to the toothed plate 713 during the upward movement, it will drive the tightening assembly 76 to drive the pipe body to be welded to rotate. At the same time, the welding component is started to start welding. The opening and closing of this 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 starts to enter the area corresponding to the toothed plate 713, welding is started. On the contrary, when it just leaves the area corresponding to the toothed plate 713, welding is closed. And if there is no pipe body placed on the material supporting assembly 75, during the process of the tightening assembly 76 passing through the area corresponding to the toothed plate 713, the welding component always remains in the closed state;

[0067] After welding is completed, when the tightening assembly 76 turns from the straight surface area on the trapezoidal guide block 714 to the inclined surface area at the high position end (see Figure 6 ), the two tightening assemblies 76 will automatically release the clamping state of the pipe body. And during the continuous upward movement, the pipe body on the material supporting assembly 75 is jacked up by the top material seat 16, and finally leaves the material supporting assembly 75 and enters the buffer grinding station.

[0068] Specifically, as Figures 6-8 shown, the material supporting assembly 75 includes a J-shaped plate 751 fixed to the bottom end of the blanking frame 74. On the outer side of the J-shaped plate 751, a T-shaped arc groove 752 corresponding to the tooth seat 715 is provided. On the inner side of the J-shaped plate 751, an arc-shaped through groove 755 connected to the T-shaped arc groove 752 is provided. 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. Among them, the rack 754 completely exposes the T-shaped arc groove 752, and when the material supporting 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 during the unloading process after welding is completed, the tooth seat 715 is used to drive the T-shaped arc plate 753 to contract into the T-shaped arc groove 752, so that the unloading process is unobstructed. An elastic member 1 756 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 Figure 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 Figure 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 a ring are fixedly arranged in the middle on the outer side of the first shaft rod. A roller groove and a machine groove are penetrated through the straight plates 84. A first rubber roller 85 is rotatably installed in the roller groove, and a first driving motor for driving the first rubber roller 85 to rotate is installed in the machine groove. By using the first driving motor to drive the first rubber roller 85 to rotate, the pipe body located between two adjacent straight plates 84 is driven to rotate. Four straight bars 86 evenly distributed in a ring are fixedly arranged at both ends on the outer side of the first shaft rod, and the straight bars 86 are located on the angular bisectors between the corresponding adjacent two straight plates 84. Convex rods 87 are fixedly arranged on the opposite sides of the straight bars 86 at both ends of the first shaft rod.

[0079] The grinding part further includes a straight through groove 813 opened in the middle of the surface of the bearing frame 11. Vertical grooves 88 and first cross grooves 89 located at both ends of the straight through groove 813 are also opened on the surface of the bearing frame 11. A first cross seat 810 is movably sleeved in each of the two first cross grooves 89. A second shaft rod is rotatably installed between the bottom ends of the two first cross seats 810. A second driving motor for driving the second shaft rod to rotate is fixedly installed on one side of one of the first cross seats 810. A grinding roller 812 is fixedly sleeved in the middle on the outer side of the second shaft rod.

[0080] Two top blocks 811 are movably inserted into the two vertical grooves 88. The two top blocks 811 are both movably sleeved on the outer side of the second shaft rod. Trapezoidal guide grooves 814 are opened on the opposite sides of the two first cross seats 810, and convex blocks for limiting the sinking amount of the first cross seats 810 are fixedly arranged on the outer sides of the two first cross seats 810.

[0081] It should be noted that during the process that the welded pipe body moves along the top material seat 716 towards the buffer grinding station, the rolled pipe body will first contact the swing seat 82, and the impulse during the rolling process of the pipe body is used to impact the swing seat 82, so that the swing seat 82 buffers and decelerates the rolled pipe body, making the pipe body passing over the swing seat 82 approach the grinding point at a lower speed. It should be further explained here that before the pipe body reaches the grinding point, one of the straight plates 84 is always perpendicular to the upper horizontal plane of the bearing frame 11, that is, the included angle between one of the straight bars 86 and the upper horizontal plane of the bearing frame 11 is 45°.

[0082] After the decelerated pipe body contacts the low-position straight plate 84 perpendicular to the upper horizontal plane of the carrier 11, the servo motor can be used to drive the first shaft to rotate 45°, so that the straight bar 86 with an included angle of 45° with the upper horizontal plane of the carrier 11 is perpendicular to the upper horizontal plane of the carrier 11. During this process, as the straight bar 86 with an included angle of 45° with the upper horizontal plane of the carrier 11 gradually switches to a state perpendicular to the upper horizontal plane of the carrier 11, the convex rod 87 on the outer side of the corresponding straight bar 86 will first enter the corresponding inclined section of the trapezoidal guide groove 814, and as the straight bar 86 swings, the convex rod 87 that swings synchronously with the straight bar 86 will squeeze the corresponding inclined plane in the trapezoidal guide groove 814, thereby driving the two first cross seats 810 to move upward and driving the second shaft to move upward, so that the grinding roller 812 and the top block 811 rise synchronously. During this period, the position of the buffer-decelerated pipe body can also be detected by an ultrasonic sensor;

[0083] Among them, the rising grinding roller 812 will pass through the straight-through groove 813 at the top of the carrier 11 as the first cross seat 810 moves upward and contact the pipe at the corresponding position. Here, 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. The rising top block 811 will use the inclined plane at its top to squeeze the pipe body, so as to use the two top blocks 811 to limit both ends of the pipe body to ensure the smooth progress of the grinding process;

[0084] After the grinding is completed, the servo motor is continued to drive the first shaft to rotate 45°, so that the pipe body that has completed grinding exits the grinding station. During this process, the first 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 11, waiting for the next round of grinding processing.

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

[0086] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A production welding device for a pressure-resistant and heat-insulating stainless steel pipe, the stainless steel pipe comprising 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) being provided between the inner and outer annular surfaces of the outer pipe (1) and the inner pipe (2), and a heat-insulating coating (5) being coated on the inner side of the vacuum cavity (4), and a gas nozzle (6) being provided at one end of each of the outer pipe (1) and the inner pipe (2) for communicating with 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 holes (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); The production welding device is used to weld two adjacent sections of a pressure-resistant and heat-insulating stainless steel pipe, and is 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 mounted on one end of the top of the base (10) close to the continuous welding mechanism (7); 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 to the inside of the slide seats (72); the slide grooves (717) are slidably connected to the inside of the push seat (78); a horizontal plate (710) is fixedly provided between the two slide seats (72) and is arranged in a through manner; a bottom frame (77) is fixedly provided at the bottom of the horizontal plate (710) and is sleeved on the outside of the push seat (78); 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).

2. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipe according to claim 1 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 tops of the opposite sides of the two vertical frames (122), 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).

3. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipe according to claim 1 is characterized by: 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 formed 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 formed on the inner side of the J-shaped plate (751); a T-shaped arc plate (753) is slidably connected to the inside of 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 to 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 fixedly arranged inside the arc-shaped through groove (755), and an arc spring being sleeved on the outside of the arc rod.

4. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipe according to claim 1 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 sleeve (761), and a limit bar (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 bar (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) for fixedly connecting the retaining ring (765) and the corresponding slide seat (72) is sleeved on the outer side of the round rod (764).

5. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipe according to claim 1 is characterized in that: 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 mounted between opposite sides of the two side baffles (81), and a grinding portion is mounted on one end of the side baffle (81) away from the continuous welding mechanism (7).

6. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipe according to claim 5 is characterized by: The grinding section 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 mounted between the two side baffles (81), and a servo motor for driving the shaft rod to rotate is fixedly mounted on one side of the mounting frame (83); Four straight plates (84) evenly distributed in an annular shape are fixedly provided at the middle 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 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), a cross seat (810) is movably sleeved inside the two cross grooves (89), a shaft rod (810) is rotatably mounted between the bottom ends of the two cross seats (810), a driving motor (810) for driving the shaft rod (810) is fixedly mounted 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).

7. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipe according to claim 6 is characterized by: A material loading pre-processing mechanism (9) corresponding to the intermittent feeding mechanism (12) is also provided on the top of the base (10), the material loading pre-processing mechanism (9) comprising a U-shaped frame (92) fixed to the outside of the material guide seat (121) and a material bin (91) fixed to the top of the base (10), and a material feeding port corresponding to the material bin (91) is provided on one side of the U-shaped frame (92); A second cylinder (94) fixed to the top of the base (10) is provided inside the U-shaped frame (92); a telescopic end of the second cylinder (94) is fixedly connected to a trapezoidal lifting block (96); and an adjustment component for adjusting the relative position of two pre-connected pipe sections is provided between the trapezoidal lifting block (96) and the U-shaped frame (92).

8. The production welding equipment for pressure-resistant and heat-insulating stainless steel pipe according to claim 7 is 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 drive motor (3) being fixedly mounted on one side of the cross seat (910); The adjustment assembly further comprises an arc-shaped embedding groove (98) formed at the top of the trapezoidal lifting block (96) and an arc block (97) fixed at the top of the trapezoidal lifting block (96). A rubber roller 2 (95) driven to rotate by a driving motor 3 is rotatably mounted inside the arc-shaped embedding groove (98).

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