Low-temperature-resistant, corrosion-resistant and wear-resistant composite stainless steel pipe for conveying fuel gas and preparation equipment thereof

Abstract

The application discloses a low-temperature-resistant, corrosion-resistant and wear-resistant composite stainless steel pipe for conveying gas and a preparation equipment thereof, which comprises an outer pipe and an inner pipe, wherein the outer pipe is slid into the inner pipe, and the outer pipe is fixedly connected with the inner pipe and coaxial with the inner pipe; the outer surface of the outer pipe is coated with a thermal insulation coating layer and wrapped with a waterproof thermal insulation layer; the overall setting of the application can pass the inner pipe on the second table plate into the outer pipe on the third table plate through the pipe penetrating mechanism, drive the pipe placement table to move through the hydraulic cylinder, and make the first table plate be below the pipe penetrating mechanism, so that the inner pipe on the first table plate can be passed into the outer pipe on the fourth table plate in the process of resetting of the pipe penetrating mechanism, the empty resetting of the pipe penetrating mechanism is avoided, and the whole is more efficient, flexible and convenient in the process of preparing the composite stainless steel pipe.

Description

Technical Field

[0001] This invention relates to the field of composite stainless steel pipe technology, specifically to a low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipe for transporting gas and its preparation equipment. Background Technology

[0002] Gas fuels are a general term for gaseous fuels that can burn and release heat for use by residents and industrial enterprises. There are many types of gas fuels, mainly including natural gas, manufactured gas, liquefied petroleum gas, biogas, and coal gas. Due to the inherent dangers of gas fuels, composite stainless steel pipes are required for transportation to ensure safety during the process.

[0003] Stainless steel composite pipe is a new material made of stainless steel and carbon structural steel through non-destructive pressure synchronous composite. It combines the corrosion resistance, wear resistance and excellent appearance of stainless steel with the good bending strength and impact resistance of carbon steel.

[0004] However, in the existing low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipes for gas transportation and their manufacturing equipment, the pipe threading mechanism needs to be reset without load after the outer pipe is threaded into the inner pipe. This process wastes a lot of time and affects the manufacturing efficiency.

[0005] Therefore, it is essential to invent a low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipe for transporting gas and its preparation equipment. Summary of the Invention

[0006] The purpose of this invention is to provide a low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipe for conveying gas and its preparation equipment, so as to solve the problem that in the existing low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipe for conveying gas and its preparation equipment, during the operation, after the pipe threading mechanism inserts the outer pipe into the inner pipe, the pipe threading mechanism needs to be reset without load. As a result, a lot of time is wasted during the empty-load reset process, thus affecting the preparation efficiency.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipe for transporting gas: comprising an outer pipe and an inner pipe, wherein: the outer pipe slides into the interior of the inner pipe, and the outer pipe and the inner pipe are fixedly connected and coaxial; the outer surface of the outer pipe is coated with a heat-insulating coating layer and wrapped with a waterproof and heat-insulating layer.

[0008] This invention also relates to a device for preparing low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipes for transporting gas: It includes a support frame, on which a pipe-passing mechanism for driving an outer pipe into an inner pipe is fixedly installed; a pipe placement platform for placing the outer and inner pipes is fixedly installed below the support frame, the pipe placement platform being below the pipe-passing mechanism; a support platform 1 is fixedly installed at each end of the pipe placement platform, and three support platforms 2 are evenly distributed and fixedly installed at the bottom of the pipe placement platform, the three support platforms 2 being located between two support platforms 1; the support frame is fixedly connected to one of the support platforms 2, and the support platform 2 is located inside the support frame;

[0009] Preferably, the tube-insertion mechanism includes a motor, a lead screw, a connecting column, and an E-type plate. The motor housing is fixedly mounted on a bracket, and the motor output end is rotatably connected to the bracket. The motor output end is fixedly connected to one end of the lead screw, which is rotatably mounted on the bracket, and an inner threaded sleeve is rotatably mounted on the lead screw. The circumference of the inner threaded sleeve is fixedly connected to the top end of the connecting column, and the bottom end of the connecting column is fixedly connected to the center of the vertical plate of the E-type plate, with the opening of the E-type plate facing downwards. Each horizontal plate of the E-type plate has a push plate fixedly mounted at one end for pushing the outer tube into the inner tube.

[0010] Preferably, the bracket includes a support mechanism, and a crossbeam is fixedly installed on the support mechanism. A limiting groove is formed on the bottom surface of the crossbeam. The output end of the motor rotates and extends into the limiting groove. The lead screw is rotated and installed in the limiting groove. The inner threaded sleeve is located in the limiting groove and is slidably connected to the limiting groove. One end of the connecting column connected to the inner threaded sleeve is located in the limiting groove and is slidably connected to the limiting groove.

[0011] Preferably, the pipe placement platform includes a platform 1, a platform 2, a platform 3, and a platform 4, with platform 1 fixedly connected to platform 2 and arranged parallel to platform 2. The dimensions of platform 1 are the same as those of platform 2. The lower end of one end of platform 1 is fixedly connected to the lower end of one end of platform 3 via a connecting block 1. The lower end of one end of platform 2 away from platform 3 is fixedly connected to the lower end of one end of platform 4 via a connecting block 2. The dimensions of platform 3 are the same as those of platform 4. The upper surfaces of platform 1 and platform 2 are each evenly distributed with a plurality of semi-circular placement slots 1 for placing inner pipes. The upper surfaces of platform 3 and platform 4 are each evenly distributed with a plurality of semi-circular slots 1 for placing outer pipes. The radius of the first semicircular placement groove is smaller than that of the second semicircular placement groove; the first semicircular placement groove on the first platform corresponds one-to-one with the second semicircular placement groove on the fourth platform and is coaxial; the first semicircular placement groove on the second platform corresponds one-to-one with the second semicircular placement groove on the third platform and is coaxial; the first and second platforms are located below the crossbeam, and the length of the crossbeam and the lead screw is greater than the length of the first and second platforms; one end of the third and fourth platforms is fixedly connected to the corresponding support platform 1; the bottom surfaces of the first, second, third, and fourth platforms are fixedly connected to the corresponding support platform 2; a number of ball bearings are evenly distributed and rotatably installed inside the first semicircular placement groove.

[0012] Preferably, the support platform one includes a U-shaped seat, a T-shaped plate, and a hydraulic cylinder. The interior of the opening of the U-shaped seat is slidably connected to the horizontal plate of the T-shaped plate. One end of the vertical plate of the T-shaped plate is fixedly connected to one end of the corresponding platform three and platform four. The tail end of the hydraulic cylinder housing is fixedly connected to the interior of the opening of the U-shaped seat, and the output end of the hydraulic cylinder is fixedly connected to one end of the horizontal plate of the T-shaped plate. The hydraulic cylinder and the U-shaped seat are arranged in parallel. The length of the U-shaped seat is twice the length of the horizontal plate of the T-shaped plate, and the length of the horizontal plate of the T-shaped plate is equal to the width of platform one plus the width of platform two.

[0013] Preferably, the support mechanism includes a U-shaped frame one and a U-shaped frame two, with one open end of the U-shaped frame one and the U-shaped frame two fixedly connected by a connecting plate one, and the other open end of the U-shaped frame one and the U-shaped frame two fixedly connected by a connecting plate two; one end of the crossbeam is fixedly connected to the center of the inner side of the connecting plate one, and the other end of the crossbeam is fixedly connected to the center of the inner side of the connecting plate two; the outer casing of the motor is fixedly connected to the center of the outer side of the connecting plate two, and the output end of the motor rotates through the connecting plate two; the bottom of the U-shaped frame one and the U-shaped frame two are fixedly connected to the corresponding support platform two, and the U-shaped frame one and the U-shaped frame two are located on both sides of the platform one and the platform two, and the length of the U-shaped frame one and the U-shaped frame two is greater than the length of the platform one and the platform two; the connecting plate one and the connecting plate two are located above the platform one and the platform two.

[0014] Preferably, a plurality of slide rails are evenly and fixedly installed in parallel inside the opening of the U-shaped seat, and a fixed seat is fixedly installed at one end of the opening of the U-shaped seat; the slide rails are slidably connected to the cross plate of the T-shaped plate; and the fixed seat is fixedly connected to the tail end of the hydraulic cylinder housing.

[0015] Preferably, the horizontal plate of the T-shaped plate has several grooves that match the slide rails, and the grooves are slidably connected to the corresponding slide rails; a connecting groove is provided on one side of the vertical plate of the T-shaped plate, and a connecting seat is fixedly installed at one end of the horizontal plate of the T-shaped plate, the connecting seat and the fixed seat are on the same side; the connecting groove is fixedly connected to one end of the corresponding platform three and platform four; the connecting seat is fixedly connected to the output end of the hydraulic cylinder.

[0016] Preferably, the second support platform includes a second U-shaped base and a second T-shaped plate, and a plurality of slide rails are evenly and fixedly installed in parallel inside the opening of the second U-shaped base; a plurality of slide grooves matching the slide rails are evenly distributed on the horizontal plate of the second T-shaped plate, and the slide grooves are slidably connected to the corresponding slide rails; one end of the vertical plate of the second T-shaped plate is fixedly connected to the bottom surface of the corresponding platform one, platform two, platform three and platform four; the length of the second U-shaped base is the same as the length of the second U-shaped base.

[0017] Preferably, a control box is fixedly installed on the outer side of the second U-shaped frame, and the controller inside the control box is electrically connected to the motor and the hydraulic cylinder.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This invention, through its overall design, allows the inner tube on platform two to be inserted into the outer tube on platform three via a tube-threading mechanism. Then, a hydraulic cylinder drives the tube placement platform to move, positioning platform one below the tube-threading mechanism. This way, during the resetting process of the tube-threading mechanism, the inner tube on platform one can be inserted into the outer tube on platform four, avoiding the need for the tube-threading mechanism to reset empty. This makes the overall process of manufacturing composite stainless steel tubes more efficient, flexible, and convenient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the support and tube insertion mechanism of the present invention.

[0022] Figure 3 This is a schematic diagram of the pipe placement platform structure of the present invention.

[0023] Figure 4 This is a partially enlarged structural diagram of point A in this invention.

[0024] Figure 5This is a schematic diagram of the support platform structure of the present invention.

[0025] Figure 6 This is a schematic diagram of the support platform structure of the present invention.

[0026] In the picture:

[0027] 1. Outer tube; 2. Inner tube; 3. Support; 3. U-shaped frame 1; 31. U-shaped frame 2; 32. Connecting plate 1; 33. Connecting plate 2; 34. Crossbeam; 35. Limiting groove; 36. Pipe threading mechanism; 4. Motor; 41. Screw; 42. Inner threaded sleeve; 43. Connecting column; 44. E-shaped plate; 45. Push plate; 46. Pipe placement platform; 5. Platform 1; 51. Platform 2; 52. Connecting block 1; 53. Platform 3; 54. Connecting block 2; 55. Platform 4; 56. Semicircular placement groove 1; 57. Semicircular placement groove 2; 58. Support platform 1; 6. U-shaped seat; 61. Slide rail; 62. T-shaped plate; 63. Connecting groove; 64. Connecting seat; 65. Hydraulic cylinder; 66. Fixed seat; 67. Support platform 2; 7. U-shaped seat 2; 71. Slide rail 2; 72. T-shaped plate 2; 73. Control box; 8. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Implementation list:

[0030] As attached Figure 1-6 As shown

[0031] This invention provides a low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipe for transporting gas, comprising an outer pipe 1 and an inner pipe 2, wherein: the outer pipe 1 slides into the interior of the inner pipe 2, the outer pipe 1 adopts existing technology, such as carbon structural steel, but not limited to this, and the outer pipe 1 and the inner pipe 2 are fixedly connected, the inner pipe 2 adopts existing technology, such as stainless steel, but not limited to this, and is coaxial; the outer surface of the outer pipe 1 is coated with a heat-insulating coating layer, the heat-insulating coating layer adopts existing technology, such as nano-hollow ceramic microspheres and inorganic polymer solutions, but not limited to this, so it will not be described in detail here, and is wrapped with a waterproof and heat-insulating layer, the waterproof and heat-insulating layer adopts existing technology, such as polyethylene film, polyurethane foam, etc., but not limited to this, so it will not be described in detail here.

[0032] A device for preparing low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipes for gas transportation includes a support 3. The support 3 ensures the stability of a pipe-threading mechanism 4. The pipe-threading mechanism 4, which drives an outer pipe 1 into an inner pipe 2, is fixedly installed on the support 3. The pipe-threading mechanism 4 allows the inner pipe 2 to be threaded into the corresponding outer pipe 1. A pipe placement platform 5, located below the support 3, is fixedly installed below the pipe-threading mechanism 4. Support platforms 6 are fixedly installed at both ends of the pipe placement platform 5, and three support platforms 7 are evenly distributed and fixedly installed at the bottom of the pipe placement platform 5. The three support platforms 7 are located between two support platforms 6. The support platforms 6 and support platforms 7 ensure the stability of the pipe placement platform 5. The support 3 is fixedly connected to one of the support platforms 7, and the support platform 7 is located inside the support 3.

[0033] The tube-threading mechanism 4 includes a motor 41, a lead screw 42, a connecting column 44, and an E-type plate 45. The housing of the motor 41 is fixedly mounted on the bracket 3, and the output end of the motor 41 is rotatably connected to the bracket 3. The output end of the motor 41 is fixedly connected to one end of the lead screw 42. The motor 41 drives the lead screw 42 to rotate, thereby causing the inner threaded sleeve 43 to move the E-type plate 45 along the lead screw 42 and the crossbeam 35. The lead screw 42 is rotatably mounted on the bracket 3, and the inner threaded sleeve 43 is rotatably mounted on the lead screw 42. The circumference of the inner threaded sleeve 43 is fixedly connected to the top end of the connecting column 44, and the bottom end of the connecting column 44 is fixedly connected to the center of the vertical plate of the E-type plate 45. The opening of the E-type plate 45 faces downward. Each horizontal plate of the E-type plate 45 has a push plate 46 fixedly mounted at one end for pushing the outer tube 1 into the inner tube 2. Through the E-type plate 45 and the push plate 46, multiple inner tubes 2 can be threaded into the corresponding outer tubes 1 simultaneously.

[0034] The bracket 3 includes a support mechanism, which ensures the stability of the crossbeam 35. The crossbeam 35 is fixedly installed on the support mechanism, which ensures the stability of the lead screw 42 during operation. The bottom surface of the crossbeam 35 has a limiting groove 36, which limits the movement of the E-shaped plate 45 and ensures its stability during movement. The output end of the motor 41 rotates into the limiting groove 36. The lead screw 42 is rotatably installed in the limiting groove 36. The inner threaded sleeve 43 is located in the limiting groove 36 and is slidably connected to it. The end of the connecting column 44 connected to the inner threaded sleeve 43 is located in the limiting groove 36 and is slidably connected to it.

[0035] The pipe placement platform 5 includes platform 1 51, platform 2 52, platform 3 54, and platform 4 56. Platform 1 51 is fixedly connected to platform 2 52 and is arranged parallel to platform 2 52. The dimensions of platform 1 51 are the same as those of platform 2 52. The lower end of one end of platform 1 51 is fixedly connected to the lower end of one end of platform 3 54 via connecting block 1 53. The setting of connecting block 1 53 allows a gap to be formed between platform 2 52 and platform 3 54. The width of this gap is greater than the thickness of the E-shaped plate 45, thereby facilitating the movement of the E-shaped plate 45 from one end of platform 2 52 to one end of platform 1 51. The lower end of platform 2 52 away from platform 3 54 is connected by connecting block 2 55. The lower part of one end of the platform 4 56 is fixedly connected to the platform 56. The platform 3 54 creates a gap between the platform 1 51 and the platform 4 56. The width of this gap is greater than the thickness of the E-shaped plate 45, facilitating the movement of the E-shaped plate 45 from one end of the platform 1 51 to one end of the platform 2 52. The dimensions of the platform 3 54 are the same as those of the platform 4 56. Several semi-circular placement slots 1 57 for placing the inner tube 2 are evenly distributed on the upper surfaces of both the platform 1 51 and the platform 2 52. The number of semi-circular placement slots 1 57 is the same as the number of push plates 46. The semi-circular placement slots 1 57 limit the movement of the inner tube 2 and ensure its stability during movement. The platform 3 54 and platform 4 56... The upper surface of each plate has several semicircular placement slots 58 evenly distributed for placing the outer tube 1. These semicircular placement slots 58 limit the movement of the outer tube 1 and ensure the stability of the inner tube 2 when it passes through the outer tube 1. The radius of the first semicircular placement slot 57 is smaller than the radius of the second semicircular placement slot 58. The first semicircular placement slot 57 on the first plate 51 corresponds one-to-one with the second semicircular placement slot 58 on the fourth plate 56 and is coaxial. The first semicircular placement slot 57 on the second plate 52 corresponds one-to-one with the second semicircular placement slot 58 on the third plate 54 and is coaxial. The first plate 51 and the second plate 52 are located below the crossbeam 35, and the length of the crossbeam 35 and the lead screw 42 is greater than the length of the first plate 51 and the second plate 52. Length; one end of each of the three platforms 54 and four platforms 56 is fixedly connected to the corresponding support platform 6; the bottom surfaces of each of the three platforms 51, 52, 54, and 56 are fixedly connected to the corresponding support platform 7; several balls are evenly distributed and rotatably installed inside the semicircular placement groove 57. By setting the balls, the friction between the inner tube 2 and the circular placement groove 57 can be reduced when the inner tube 2 moves along the circular placement groove 57; the positions of the semicircular placement groove 57 and the semicircular placement groove 58 correspond to the positions of the push plate 46, and the radius of the push plate 46 is smaller than the radius of the semicircular placement groove 57. The diameter of the push plate 46 is larger than the inner diameter of the inner tube 2 and smaller than the inner diameter of the inner tube 2.It should be noted that when the position of the push plate 46 coincides with the position of the semi-circular placement groove 57 on the first platform 51, the push plate 46 and the semi-circular placement groove 57 are coaxial. When the position of the push plate 46 coincides with the position of the semi-circular placement groove 58 on the second platform 52, the push plate 46 and the semi-circular placement groove 58 are coaxial.

[0036] The support platform 6 includes a U-shaped base 61, a T-shaped plate 63, and a hydraulic cylinder 66. The interior of the opening of the U-shaped base 61 is slidably connected to the horizontal plate of the T-shaped plate 63. The U-shaped base 61 ensures the stability of the T-shaped plate 63. One end of the vertical plate of the T-shaped plate 63 is fixedly connected to one end of the corresponding platform 3 54 and platform 4 56. The T-shaped plate 63 supports the pipe placement platform 5 and allows the pipe placement platform 5 to move along the U-shaped base 61. The tail end of the housing of the hydraulic cylinder 66 is connected to the opening of the U-shaped base 61. The internal fixed connection at the opening, through the setting of hydraulic cylinder 66, can drive T-shaped plate 63 to move the pipe placement platform 5 along U-shaped seat 61, so that platform one 51 and platform two 52 are alternately placed under E-shaped plate 45, and the output end of hydraulic cylinder 66 is fixedly connected to one end of the horizontal plate of T-shaped plate 63. The hydraulic cylinder 66 and U-shaped seat 61 are arranged in parallel; the length of U-shaped seat 61 is twice the length of the horizontal plate of T-shaped plate 63, and the length of the horizontal plate of T-shaped plate 63 is equal to the width of platform one 51 plus the width of platform two 52.

[0037] The support mechanism includes a U-shaped frame 31 and a U-shaped frame 32. One open end of the U-shaped frame 31 and the U-shaped frame 32 are fixedly connected via a connecting plate 33, and the other open end of the U-shaped frame 31 and the U-shaped frame 32 are fixedly connected via a connecting plate 34. One end of a crossbeam 35 is fixedly connected to the center of the inner side of the connecting plate 33, and the other end of the crossbeam 35 is fixedly connected to the center of the inner side of the connecting plate 34. The housing of the motor 41 is fixedly connected to the center of the outer side of the connecting plate 34, and the output end of the motor 41 rotates through the connecting plate 34. The bottoms of the U-shaped frames 31 and 32 are connected to the corresponding support platform 7. The U-shaped frame 31 and U-shaped frame 32 are fixedly connected, and are located on both sides of the platform 51 and platform 52. The length of the U-shaped frame 31 and U-shaped frame 32 is greater than the length of the platform 51 and platform 52. The connecting plate 33 and connecting plate 34 are located above the platform 51 and platform 52. The U-shaped frame 31 and U-shaped frame 32 ensure the overall stability of the support 3 and the tube-passing mechanism 4, and facilitate the tube-passing mechanism 4 to pass the inner tube 2 on platform 2 52 into the outer tube 1 on platform 3 54, and to pass the inner tube 2 on platform 1 51 into the outer tube 1 on platform 4 56.

[0038] Several slide rails 62 are evenly and uniformly fixedly installed inside the opening of the U-shaped seat 61. The slide rails 62 limit the movement of the T-shaped plate 63 and ensure its stability during movement. A fixed seat 67 is fixedly installed at one end inside the opening of the U-shaped seat 61. The fixed seat 67 ensures the stability of the hydraulic cylinder 66. The slide rails 62 are slidably connected to the cross plate of the T-shaped plate 63. The fixed seat 67 is fixedly connected to the tail end of the housing of the hydraulic cylinder 66.

[0039] The horizontal plate of the T-shaped plate 63 has several grooves that match the slide rails 62. The grooves and slide rails 62 ensure the stability between the T-shaped plate 63 and the U-shaped seat 61, and the grooves and the corresponding slide rails 62 are slidably connected. A connecting groove 64 is provided on one side of the vertical plate of the T-shaped plate 63, and a connecting seat 65 is fixedly installed at one end of the horizontal plate of the T-shaped plate 63. The connecting seat 65 ensures the stability between the T-shaped plate 63 and the hydraulic cylinder 66. The connecting seat 65 is on the same side as the fixed seat 67. The connecting groove 64 is fixedly connected to one end of the corresponding platform three 54 and platform four 56. The connecting seat 65 is fixedly connected to the output end of the hydraulic cylinder 66.

[0040] The support platform 2 7 includes a U-shaped seat 2 71 and a T-shaped plate 2 73. Several slide rails 2 72 are evenly and uniformly installed inside the opening of the U-shaped seat 2 71. Several sliding grooves 2 that match the slide rails 2 72 are evenly distributed on the horizontal plate of the T-shaped plate 2 73. The sliding grooves 2 are slidably connected to the corresponding slide rails 2 72. The arrangement of slide rails 2 72 and sliding grooves 2 can ensure the stability of the movement between the U-shaped seat 2 71 and the T-shaped plate 2 73. One end of the vertical plate of the T-shaped plate 2 73 is fixedly connected to the bottom surface of the corresponding platform 1 51, platform 2 52, platform 3 54 and platform 4 56. The arrangement of the T-shaped plate 2 73 can support the pipe placement platform 5 and make the pipe placement platform 5 move stably along the U-shaped seat 2 71. The length of the U-shaped seat 2 71 is the same as the length of the U-shaped seat 61.

[0041] A control box 8 is fixedly installed on the outside of the U-shaped frame 32, and the controller inside the control box 8 is electrically connected to the motor 41 and the hydraulic cylinder 66. The controller adopts existing technology, such as the single-chip microcomputer in the existing technology, so it will not be described in detail here.

[0042] In this implementation:

[0043] First, such as Figure 1As shown, U-shaped base 61 and U-shaped base 2 71 are fixed to the ground by corresponding fasteners. Then, motor 41 drives screw 42 to rotate counterclockwise, causing E-shaped plate 45 to move to the end closest to motor 41. At this time, inner tube 2 is placed in semi-circular placement slot 1 57 on platform 1 51 and platform 2 52 respectively, and outer tube 1 is placed in semi-circular placement slot 2 58 on platform 3 54 and platform 4 56 respectively. Then, hydraulic cylinder 66 is fully extended, and inner tube 2 on platform 2 52 will overlap with push plate 46 on E-shaped plate 45. Correspondingly, the motor 41 drives the lead screw 42 to rotate clockwise, which in turn drives the push plate 46 on the E-type plate 45 to contact one end of the corresponding inner tube 2. This causes the push plate 46 to move the corresponding inner tube 2 towards one side of the platform 3 54 until the inner tube 2 is completely inserted into the outer tube 1 on the platform 3 54. At this point, the push plate 46 on the E-type plate 45 will be in the gap between the platform 2 52 and the platform 3 54. Then, without resetting the E-type plate 45, the hydraulic cylinder 66 is fully retracted. At this point, the inner tube 2 on the platform 1 51 will contact the push plate 46 on the E-type plate 45. Plates 46 are aligned one-to-one. Then, the motor 41 drives the lead screw 42 to rotate counterclockwise, which in turn drives the push plate 46 on the E-type plate 45 to contact one end of the corresponding inner tube 2. This causes the push plate 46 to move the corresponding inner tube 2 to one side of the platform 4 56 until the inner tube 2 is completely inserted into the outer tube 1 on the platform 4 56. At this point, the push plate 46 on the E-type plate 45 will be in the gap between the platform 1 51 and the platform 4 56. During the process of the E-type plate 45 inserting the inner tube 2 on the platform 1 51 into the outer tube 1 on the platform 4 56, the platform 3 can be removed. The composite stainless steel tubes prepared on platform 54 are placed in the semi-circular placement slot 57 on platform 2 and the corresponding outer tube 1 is placed in the semi-circular placement slot 58 on platform 3. After the inner tube 2 on platform 1 is inserted into the outer tube 1 on platform 46 by E-type plate 45, the hydraulic cylinder 66 is fully extended so that E-type plate 45 pushes the inner tube 2 on platform 2 into the outer tube 1 on platform 3, and the composite stainless steel tube prepared on platform 46 is removed. Finally, the above process is repeated.

[0044] All components used in this application are standard parts, and the specific connection methods of each part adopt conventional methods such as threads, bolts, and nesting that are mature in the prior art. All structures use conventional materials in the prior art, and will not be described in detail here.

[0045] In summary, this low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipe for gas transportation and its manufacturing equipment, through its overall design, allows the inner pipe on platform two to be inserted into the outer pipe on platform three via a pipe-threading mechanism. Then, a hydraulic cylinder drives the pipe placement platform to move, positioning platform one below the pipe-threading mechanism. During the resetting process of the pipe-threading mechanism, the inner pipe on platform one can be inserted into the outer pipe on platform four, avoiding the need for the pipe-threading mechanism to reset empty. This makes the overall process of manufacturing composite stainless steel pipes more efficient, flexible, and convenient.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preparing low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipes for conveying gas, characterized in that: The stainless steel pipe includes an outer pipe (1) and an inner pipe (2), wherein: the outer pipe (1) slides into the interior of the inner pipe (2), and the outer pipe (1) and the inner pipe (2) are fixedly connected; the outer surface of the outer pipe (1) is coated with a heat-insulating coating layer and wrapped with a waterproof heat-insulating layer; the preparation equipment includes a support (3), on which a pipe-penetrating mechanism (4) for driving the outer pipe (1) into the inner pipe (2) is fixedly installed, and below the support (3) a device for placing the outer pipe (1) and the inner pipe (2) is fixedly installed. The inner tube (2) is placed on a pipe platform (5) below the pipe threading mechanism (4); each end of the pipe platform (5) is fixedly installed with a support platform (6), and three support platforms (7) are evenly and fixedly installed at the bottom of the pipe platform (5), with the three support platforms (7) located between two support platforms (6); the bracket (3) is fixedly connected to one of the support platforms (7), and this support platform (7) is located inside the bracket (3); The tube insertion mechanism (4) includes a motor (41), a lead screw (42), a connecting column (44), and an E-type plate (45). The outer casing of the motor (41) is fixedly mounted on the bracket (3), and the output end of the motor (41) is rotatably connected to the bracket (3). The output end of the motor (41) is fixedly connected to one end of the lead screw (42), and the lead screw (42) is rotatably mounted on the bracket (3). An inner threaded sleeve (43) is rotatably mounted on the lead screw (42). The circumferential surface of the inner threaded sleeve (43) is fixedly connected to the top end of the connecting column (44), and the bottom end of the connecting column (44) is fixedly connected to the vertical plate of the E-type plate (45). Each horizontal plate of the E-type plate (45) has a push plate (46) fixedly mounted at one end for pushing the outer tube (1) into the inner tube (2). The bracket (3) includes a support mechanism, and a crossbeam (35) is fixedly installed on the support mechanism. A limiting groove (36) is formed on the bottom surface of the crossbeam (35). The output end of the motor (41) rotates into the limiting groove (36). The lead screw (42) is rotatably installed in the limiting groove (36). The inner threaded sleeve (43) is located in the limiting groove (36) and is slidably connected to it. One end of the connecting column (44) connected to the inner threaded sleeve (43) is located in the limiting groove (36) and is slidably connected to the limiting groove (36); the pipe placement platform (5) includes a platform one (51), a platform two (52), a platform three (54) and a platform four (56), and the platform one (51) and the platform two (52) are fixedly connected; one end of the platform two (52) is fixedly connected to one end of the platform three (54) through a connecting block one (53); one end of the platform one (51) is fixedly connected to one end of the platform four (56) through a connecting block two (55); a number of semi-circular placement grooves one (57) for placing the inner pipe (2) are evenly distributed on the platform one (51) and the platform two (52); a number of semi-circular placement grooves one (57) for placing the inner pipe (2) are evenly distributed on the platform three (54) and the platform four (56). The outer tube (1) is placed in a semi-circular groove 2 (58); the semi-circular groove 1 (57) on the first platform (51) corresponds one-to-one with the semi-circular groove 2 (58) on the fourth platform (56); the semi-circular groove 1 (57) on the second platform (52) corresponds one-to-one with the semi-circular groove 2 (58) on the third platform (54); the first platform (51) and the second platform (52) are located below the crossbeam (35); one end of the third platform (54) and the fourth platform (56) are fixedly connected to the corresponding support platform 1 (6); the bottom surfaces of the first platform (51), the second platform (52), the third platform (54) and the fourth platform (56) are fixedly connected to the corresponding support platform 2 (7); a number of ball bearings are evenly distributed and rotatably installed inside the semi-circular groove 1 (57); The support platform (6) includes a U-shaped seat (61), a T-shaped plate (63) and a hydraulic cylinder (66), and the U-shaped seat (61) and the horizontal plate of the T-shaped plate (63) are slidably connected. One end of the vertical plate of the T-shaped plate (63) is fixedly connected to one end of the corresponding platform three (54) and platform four (56). The tail end of the housing of the hydraulic cylinder (66) is fixedly connected to the U-shaped seat (61), and the output end of the hydraulic cylinder (66) is fixedly connected to one end of the horizontal plate of the T-shaped plate (63).

2. The equipment for preparing low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipes for conveying gas as described in claim 1, characterized in that: The support mechanism includes a U-shaped frame one (31) and a U-shaped frame two (32), with one end of the U-shaped frame one (31) and the U-shaped frame two (32) fixedly connected by a connecting plate one (33), and the other end of the U-shaped frame one (31) and the U-shaped frame two (32) fixedly connected by a connecting plate two (34); one end of the crossbeam (35) is fixedly connected to the connecting plate one (33), and the other end of the crossbeam (35) is fixedly connected to the connecting plate two (34); the motor (41) The outer shell is fixedly connected to the connecting plate 2 (34), and the output end of the motor (41) rotates through the connecting plate 2 (34); the bottom of the U-shaped frame 1 (31) and the U-shaped frame 2 (32) are fixedly connected to the corresponding support platform 2 (7), and the U-shaped frame 1 (31) and the U-shaped frame 2 (32) are located on both sides of the platform 1 (51) and the platform 2 (52); the connecting plate 1 (33) and the connecting plate 2 (34) are located above the platform 1 (51) and the platform 2 (52).

3. The equipment for preparing low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipes for conveying gas as described in claim 1, characterized in that: Several slide rails (62) are evenly distributed and fixedly installed inside the U-shaped seat (61), and a fixed seat (67) is fixedly installed at one end inside the U-shaped seat (61); the slide rails (62) are slidably connected to the cross plate of the T-shaped plate (63); the fixed seat (67) is fixedly connected to the tail end of the housing of the hydraulic cylinder (66).

4. The equipment for preparing low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipes for conveying gas as described in claim 3, characterized in that: The horizontal plate of the T-shaped plate (63) has several grooves that match the slide rails (62), and the grooves are slidably connected to the corresponding slide rails (62); a connecting groove (64) is provided on one side of the vertical plate of the T-shaped plate (63), and a connecting seat (65) is fixedly installed at one end of the horizontal plate of the T-shaped plate (63); the connecting groove (64) is fixedly connected to one end of the corresponding platform three (54) and platform four (56); the connecting seat (65) is fixedly connected to the output end of the hydraulic cylinder (66).

5. The equipment for preparing low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipes for conveying gas as described in claim 1, characterized in that: The second support platform (7) includes a second U-shaped seat (71) and a second T-shaped plate (73), and several slide rails (72) are evenly and fixedly installed inside the second U-shaped seat (71); several slide grooves matching the slide rails (72) are evenly distributed on the horizontal plate of the second T-shaped plate (73), and the slide grooves are slidably connected to the corresponding slide rails (72); one end of the vertical plate of the second T-shaped plate (73) is fixedly connected to the bottom surface of the corresponding first platform (51), second platform (52), third platform (54) and fourth platform (56).

6. The equipment for preparing low-temperature resistant, corrosion-resistant, and wear-resistant composite stainless steel pipes for conveying gas as described in claim 2, characterized in that: A control box (8) is fixedly installed on the outside of the second U-shaped frame (32), and the controller inside the control box (8) is connected to... There is an electrical connection between the motor (41) and the hydraulic cylinder (66).

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