Thick-wall longitudinal welded pipe heat treatment device

Abstract

The invention relates to the field of metal heat treatment, and discloses a thick-wall longitudinal welded pipe heat treatment device which comprises a workbench, and multiple sets of high-frequency heating boxes are installed at the top of the workbench; the first transmission mechanism comprises a base and a plurality of sets of first fixing cylinders, a first sealing column and a first piston are arranged in the base in a sealed and sleeved mode, and a material conveying assembly is installed at the top end of the first sealing column; the second transmission mechanism comprises four sets of second fixing cylinders fixedly installed at the four corners of the top of the base. According to the device, the first transmission mechanism and the second transmission mechanism are combined together, the first transmission mechanism is responsible for feeding and discharging a workpiece, the second transmission mechanism is responsible for supporting the workpiece in a rolling mode, and the first transmission mechanism and the second transmission mechanism are matched with each other, so that the workpiece can rotate around the axis of the workpiece during induction heating; and the overall heating uniformity of the workpiece is improved.

Description

Technical Field

[0001] The present application relates to the technical field of metal heat treatment, and in particular to a heat treatment device for thick-walled straight seam welded pipes. Background Art

[0002] Thick-walled straight seam steel pipe is a metal tubular structure formed by coiling and butt welding metal sheets. In order to eliminate the residual internal stress at the weld and improve the mechanical properties of the welded pipe, the thick-walled straight seam welded pipe needs to be heat treated: the thick-walled straight seam welded pipe is heated to a certain temperature and then naturally cooled (or spray cooled, forced air cooled) to room temperature. Heat treatment can make the weld of the thick-walled straight seam welded pipe and the pipe body material achieve consistency in material properties and avoid rust at the weld. Usually, the welded stainless steel pipe needs to be heat treated; a heat treatment device for thick-walled straight seam welded pipe in the prior art is mainly composed of multiple groups of equally spaced high-frequency heating boxes, and a feeding and supporting mechanism is set between the multiple groups of high-frequency heating boxes to feed the thick-walled straight seam welded pipe. In the existing technology, metal rollers are mainly used to support thick-walled straight seam welded pipes, and the surface of the thick-walled straight seam welded pipe heated to a high temperature is in direct contact with the surface of the metal roller. Since the exposed part of the metal pipe cannot be heated by the high-frequency heating box, it is necessary to rely on the thermal conductivity of the thick-walled straight seam welded pipe itself to achieve heating of the entire pipe body, and the thick-walled straight seam welded pipe needs to be rotated (around its own axis). However, since the thick-walled straight seam welded pipe needs to be loaded and unloaded along its own axis, the support structure with rollers as the main method in the existing technology is insufficient, and the rollers cannot realize multi-axis rotation to adapt to the loading and unloading movement of the thick-walled straight seam welded pipe and its own rotation for uniform heating. Therefore, improvement is urgently needed. Summary of the Invention

[0003] The present application proposes a heat treatment device for thick-walled straight seam welded pipes, which has the advantages of stable support and efficient loading and unloading, and is used to solve the problem of single function caused by a single roller in the prior art.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a heat treatment device for thick-walled straight seam welded pipes, comprising: A workbench, with multiple groups of high-frequency heating boxes installed on the top of the workbench; Transmission mechanism 1, the transmission mechanism 1 includes a base and multiple sets of fixed cylinders 1, the internal sealing sleeve of the base is provided with a sealing column 1 and a piston 1, and the top of the sealing column 1 is installed with a material transport component; Transmission mechanism 2, comprising four sets of fixed cylinders 2 fixedly mounted at the four corners of the top of the base, wherein the internal sealing sleeve of the fixed cylinder 2 is provided with a sealing column 2 and a piston 2, a support frame is fixedly mounted on the top of the sealing column 2, two sets of support assemblies are mounted on the top of the support frame, and a workpiece is placed on the top of the support assembly; A connecting pipe is installed between the fixed cylinder 1 and multiple groups of fixed cylinders 2. The inner cavities of the fixed cylinder 2, the sealing column 2 and the connecting pipe are filled with transmission fluid. A telescopic rod is installed on the top of the base, and the telescopic end of the telescopic rod is fixedly connected to the support frame.

[0005] Preferably, the top of the workbench is provided with multiple groups of placement slots, the transmission mechanism 1 and the transmission mechanism 2 are both located in the placement slots, the top of the support frame is provided with a through slot, the material transport assembly is located in the through slot, and the fixed cylinder 1 is fixedly installed on the top of the base.

[0006] Preferably, the material transport assembly includes a mounting bracket fixedly mounted on the top of a sealing column, a motor is mounted inside the mounting bracket, a gear is fixedly mounted on the output shaft of the motor, a support column is rotatably mounted on the top inside the mounting bracket, a gear is fixedly mounted on one end of the support column, a rotating drum is fixedly mounted on the outer surface of the support column, and a contact sleeve is fixedly sleeved on the outer surface of the rotating drum.

[0007] Preferably, the support assembly includes a fixing frame fixedly mounted on the top of the supporting frame, a supporting column 2 is rotatably mounted inside the fixing frame, a rotating drum 2 is fixedly mounted on the outer surface of the supporting column 2, a contact sleeve 2 is fixedly sleeved on the outer surface of the rotating drum 2, and the outer surface of the contact sleeve 2 is in rolling contact with the workpiece, a motor 2 is mounted on the outer side of the fixing frame at the front side, and the motor 2 is transmission-connected to the supporting column 2 at the front side.

[0008] Preferably, a protective cover is installed on the outer side of the front group of motor 2, and a plurality of ventilation slots are provided on the side of the protective cover facing the rotating drum 2. The protective cover is adapted to wrap around the outer surface of the motor 2.

[0009] Preferably, a protective cover is fixedly installed on the middle part of the inner wall of the mounting frame, and the protective cover is semicircular and covers the top of the motor.

[0010] Preferably, the first piston is fixedly mounted on the bottom end of the first sealing column, the second piston is fixedly mounted on the bottom end of the second sealing column, and the transmission fluid seal abuts against the bottom ends of the second piston and the first piston.

[0011] Preferably, the outer surface of the sealing column 1 is movably sleeved with a spring located inside the fixed cylinder 1, and the two ends of the spring are elastically connected to the fixed cylinder 1 and the piston 1 respectively, and the spring is compressed and arranged on the top of the piston 1.

[0012] Preferably, the diameter of the gear one is larger than the diameter of the gear two, and the left-right distance between the inner walls of the through groove is larger than the diameter of the gear two.

[0013] Preferably, the second contact sleeve and the first contact sleeve are both made of fireproof and high-temperature resistant materials, and the hardness of the second contact sleeve and the first contact sleeve is less than the hardness of the workpiece.

[0014] The beneficial effects of the present invention are as follows: This device has been redesigned to have dual adjustment functions of material transportation and support, achieving stable support effect and high loading and unloading efficiency.

[0015] 1. First, this device combines transmission mechanism 1 and transmission mechanism 2 together. Transmission mechanism 1 is responsible for loading and unloading the workpiece, and transmission mechanism 2 is responsible for rolling support of the workpiece. Transmission mechanism 1 and transmission mechanism 2 cooperate with each other to enable the workpiece to rotate around its own axis during induction heating, thereby improving the uniformity of heating of the workpiece as a whole. Transmission mechanism 1 drives the workpiece along its axis under the drive of motor 1 to realize the loading and unloading function of the workpiece. A pair of fixed cylinders are used to support sealing column 1, piston 1 and mounting frame, and a pair of fixed cylinders are used to support sealing column 2 and support frame. The fixed cylinders are connected through connecting pipes. The inner cavity of cylinder one and fixed cylinder two, and the transmission fluid is used for hydraulic lossless transmission between piston one and piston two. Under the drive of the telescopic rod, when the support assembly and piston two move downward, the transmission fluid is forced to flow and gather toward the inner cavity of fixed cylinder one, thereby transmitting the pressure from bottom to top to piston one and material transport assembly, so that the material transport assembly and support assembly can be positioned during the up and down movement, and the contact sleeve two and contact sleeve one can simultaneously abut against the outer surface of the workpiece, so that when the rotating cylinder two and contact sleeve two drive the workpiece to move, the two groups of contact sleeves two are used for support and limitation, thereby reducing the resistance of the workpiece surface during movement and the wear of the contact sleeve two and the ventilation groove.

[0016] 2. Then, the telescopic rod is used to drive the support frame and the two groups of support components on the support frame to move upward, and the workpiece is pushed upward, so that the axis of the workpiece moves to be collinear with the spiral axis of the high-frequency induction coil inside the high-frequency heating box, thereby maximizing the heating performance of the high-frequency heating box on the workpiece. When the telescopic rod drives the support frame and piston 2, the space for accommodating the transmission fluid at the bottom of the inner cavity of the fixed cylinder 2 increases. At this time, the spring in the inner cavity of the fixed cylinder 1 pushes piston 1 downward, so that the transmission fluid is always in a saturated filling state in the enclosed space formed by the fixed cylinder 1, the fixed cylinder 2 and the connecting pipe, thereby realizing the descent of the sealing column 1 and the mounting frame, and making the contact sleeve 1 move downward synchronously away from the outer surface of the workpiece, so that when the motor 2 drives the workpiece to rotate by driving the support column 2, the rotating cylinder 2 and the contact sleeve 2, the interference of the contact sleeve on the workpiece is avoided.

[0017] 3. Finally, this device utilizes the up and down staggered movement of the material transport component and the support component to provide a limiting function for the rotation of the contact sleeve 1 and drive the workpiece for transportation and loading and unloading. By controlling the downward movement of the telescopic rod, the contact sleeve 2 moves downward, while the contact sleeve 1 moves upward synchronously, so that the contact sleeve 1 abuts against the bottom of the workpiece and bears most of the weight of the workpiece, so that the contact sleeve 2 only bears the function of limiting the workpiece on the front and rear sides of the workpiece, thereby reducing the wear between the workpiece and the contact sleeve 2 during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application in a clear and understandable manner.

[0019] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 This is a schematic diagram of the front appearance of the overall structure of the present invention; Figure 2 It is a side view schematic diagram of the overall structure of the present invention; Figure 3 It is a side cutaway schematic diagram of the overall structure of the present invention; Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at center A; Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at B in the middle; Figure 6 It is a front cross-sectional schematic diagram of the transmission mechanism 1 and the transmission mechanism 2 of the present invention; Figure 7 It is a top view and a cross-sectional schematic diagram of the fixing cylinder 1, the fixing cylinder 2 and the connecting pipe of the present invention; Figure 8 This is a schematic axial cross-sectional view of the first and second fixed cylinders and the connecting pipe of the present invention; Figure 9 This is a schematic diagram of the separation of the transmission mechanism 2 of the present invention; Figure 10 This is a schematic diagram of the separation of the transmission mechanism 1 of the present invention.

[0020] Among them: 1. Workbench; 2. High-frequency heating box; 3. Workpiece; 4. Transmission mechanism 1; 41. Base; 42. Fixed cylinder 1; 43. Sealing column 1; 44. Mounting frame; 45. Motor 1; 46. Gear 1; 47. Support column 1; 48. Rotating cylinder 1; 49. Contact sleeve 1; 410. Gear 2; 411. Protective cover; 412. Piston 1; 413. Spring; 5. Transmission mechanism 2; 51. Fixed cylinder 2; 52. Sealing column 2; 53. Piston 2; 54. Support frame; 55. Through groove; 56. Fixed frame; 57. Motor 2; 58. Protective cover; 59. Ventilation groove; 510. Support column 2; 511. Rotating cylinder 2; 512. Contact sleeve 2; 6. Placement groove; 7. Transmission fluid; 8. Connecting pipe; 9. Telescopic rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0022] See also Figures 1-10 This embodiment discloses a heat treatment device for thick-walled straight seam welded pipes, comprising: A workbench 1, with multiple sets of high-frequency heating boxes 2 installed on the top of the workbench 1; Transmission mechanism 4, comprising a base 41 and multiple sets of fixed cylinders 42, an internal sealing sleeve of the base 41 is provided with a sealing column 43 and a piston 412, and a material transport assembly is installed on the top of the sealing column 43; Transmission mechanism 2 5 , comprising four sets of fixed cylinders 2 51 fixedly mounted at the four corners of the top of the base 41 , the internal sealing sleeve of the fixed cylinder 2 51 being provided with a sealing column 2 52 and a piston 2 53 , the top of the sealing column 2 52 being fixedly mounted with a support frame 54 , the top of the support frame 54 being mounted with two sets of support assemblies, the top of which being placed with the workpiece 3 ; A connecting pipe 8 is installed between the fixed cylinder 1 42 and the multiple groups of fixed cylinders 2 51. The inner cavities of the fixed cylinder 2 51, the sealing column 2 52 and the connecting pipe 8 are filled with transmission fluid 7. A telescopic rod 9 is installed on the top of the base 41. The telescopic end of the telescopic rod 9 is fixedly connected to the support frame 54. This device has been redesigned to have dual adjustment functions of material transportation and support, achieving stable support effect and high loading and unloading efficiency.

[0023] First, the device combines the transmission mechanism 1 4 and the transmission mechanism 2 5 together. The transmission mechanism 1 4 is responsible for loading and unloading the workpiece 3, and the transmission mechanism 2 5 is responsible for rolling support for the workpiece 3. The transmission mechanism 1 4 and the transmission mechanism 2 5 cooperate with each other to enable the workpiece 3 to rotate around its own axis during induction heating, thereby improving the overall heating uniformity of the workpiece 3. The transmission mechanism 1 4 drives the workpiece 3 to move along its axis under the drive of the motor 1 45, thereby realizing the loading and unloading functions of the workpiece 3. The sealing column 1 43, the piston 1 412 and the mounting frame 44 are supported by the fixed cylinder 1 42, the sealing column 2 52 and the support frame 54 are supported by the fixed cylinder 2 51, and the fixed cylinder 1 42 is connected with the fixed cylinder 3 through the connecting pipe 8. The inner cavity of the fixed cylinder 51 is used, and the transmission fluid 7 is used for hydraulic lossless transmission between the piston 1 412 and the piston 2 53. Under the drive of the telescopic rod 9, when the support assembly and the piston 2 53 move downward, the transmission fluid 7 is forced to flow and gather toward the inner cavity of the fixed cylinder 42, thereby transmitting the pressure from bottom to top to the piston 1 412 and the material transport assembly, so that the material transport assembly and the support assembly can be positioned during the up and down movement, and the contact sleeve 2 512 and the contact sleeve 1 49 can simultaneously abut against the outer surface of the workpiece 3, so that when the rotating cylinder 2 511 and the contact sleeve 2 512 drive the workpiece 3 to move, the two groups of contact sleeves 2 512 are used for support and limitation, thereby reducing the resistance of the surface of the workpiece 3 during the movement and the wear of the contact sleeve 2 512 and the ventilation groove 59.

[0024] Then, the telescopic rod 9 is used to drive the support frame 54 and the two groups of support components located on the support frame 54 to move upward, push the workpiece 3 upward, and make the axis of the workpiece 3 move to be collinear with the spiral axis of the high-frequency induction coil inside the high-frequency heating box 2, thereby maximizing the heating performance of the high-frequency heating box 2 on the workpiece 3. When the telescopic rod 9 drives the support frame 54 and the piston 2 53, the space for accommodating the transmission fluid 7 at the bottom of the inner cavity of the fixed cylinder 2 51 increases. At this time, the spring 413 in the inner cavity of the fixed cylinder 1 42 pushes the piston 1 412 downward, so that the transmission fluid 7 is always in a saturated filling state in the closed space formed by the fixed cylinder 1 42, the fixed cylinder 2 51 and the connecting pipe 8, thereby realizing the descent of the sealing column 1 43 and the mounting frame 44, so that the contact sleeve 1 49 is synchronously moved downward away from the outer surface of the workpiece 3, so that when the motor 2 57 drives the workpiece 3 to rotate by driving the support column 2 510, the rotating cylinder 2 511 and the contact sleeve 2 512, the interference of the contact sleeve 1 49 on the workpiece 3 is avoided.

[0025] Finally, this device utilizes the up and down staggered movement of the material transport component and the support component to provide a limiting effect for the contact sleeve 1 49 to rotate and drive the workpiece 3 to be transported and unloaded. By controlling the telescopic rod 9 to move downward, the contact sleeve 2 512 moves downward, and the contact sleeve 1 49 moves upward synchronously, so that the contact sleeve 1 49 abuts against the bottom of the workpiece 3 and bears most of the weight of the workpiece 3, so that the contact sleeve 2 512 only bears the limiting function of the workpiece 3 on the front and rear sides of the workpiece 3, thereby reducing the wear between the workpiece 3 and the contact sleeve 2 512 during transportation.

[0026] The top of the workbench 1 is provided with multiple sets of placement slots 6, the transmission mechanism 1 4 and the transmission mechanism 2 5 are both located in the placement slots 6, the top of the support frame 54 is provided with a through slot 55, the material transport assembly is located in the through slot 55, and the fixing cylinder 1 42 is fixedly installed on the top of the base 41; like Figure 3 As shown, the placement groove 6 is used to place the transmission mechanism 1 4 and the transmission mechanism 2 5, and to support and transport the workpiece 3. The placement groove 6 provides space for the transmission mechanism 1 4 and the transmission mechanism 2 5 to work.

[0027] The material transport assembly includes a mounting frame 44 fixedly mounted on the top of a sealing column 43, a motor 45 is mounted inside the mounting frame 44, a gear 46 is fixedly mounted on the output shaft of the motor 45, a support column 47 is rotatably mounted on the top of the mounting frame 44, a gear 2 410 is fixedly mounted on one end of the support column 47, a rotating drum 48 is fixedly mounted on the outer surface of the support column 47, and a contact sleeve 49 is fixedly sleeved on the outer surface of the rotating drum 48; like Figure 6 and Figure 8 As shown, when the support assembly moves downward and the material transport assembly moves upward and abuts against the bottom of the workpiece 3, the movement of the telescopic rod 9 is stopped. At this time, the motor 1 45 can be started to drive the gear 1 46, the gear 2 410, the support column 1 47, the rotating drum 1 48 and the contact sleeve 1 49 to rotate, thereby driving the workpiece 3 to be loaded and unloaded along the transport direction through the friction between the workpiece 3 and the contact sleeve 1 49.

[0028] The support assembly includes a fixing frame 56 fixedly mounted on the top of the support frame 54, a second support column 510 is rotatably mounted inside the fixing frame 56, a second rotating drum 511 is fixedly mounted on the outer surface of the second support column 510, a second contact sleeve 512 is fixedly sleeved on the outer surface of the second rotating drum 511, and the outer surface of the second contact sleeve 512 is in rolling contact with the workpiece 3, a second motor 57 is mounted on the outer side of the fixing frame 56 at the front side, and the second motor 57 is transmission-connected to the second support column 510 at the front side; like Figure 3 and Figure 4As shown, at this time, the support component fully supports the workpiece 3 upward, while the material transport component is located below and cannot contact the workpiece 3. At this time, the high-frequency heating box 2 can be started and the workpiece 3 can be induction heated. At this time, the motor 2 57 can drive the rotating drum 2 511 and the contact sleeve 2 512 located on the front side to rotate, and when the workpiece 3 is pressed on the outer surface of the contact sleeve 2 512, friction will be generated, thereby driving the workpiece 3 to rotate, and the rotating workpiece 3 will be heated more evenly and efficiently.

[0029] A protective cover 58 is installed on the outer side of the second motor 57 located at the front side. The protective cover 58 has multiple sets of ventilation slots 59 on the side facing the second drum 511. The protective cover 58 is adapted to wrap around the outer surface of the second motor 57. like Figure 9 As shown, the protective cover 58 is used to isolate the workpiece 3 heated to a high temperature and the motor 2 57, protecting the motor 2 57 from high temperature attacks. At the same time, the multiple sets of ventilation slots 59 opened on the side of the protective cover 58 are conducive to the internal ventilation of the protective cover 58, and form air convection along the axis of the motor 2 57, further accelerating the heat dissipation around the motor 2 57 and improving the heat dissipation efficiency.

[0030] A protective cover 411 is fixedly mounted on the middle of the inner wall of the mounting frame 44. The protective cover 411 is semicircular and covers the top of the motor 1 45. The protective cover 411 is used to protect the upper part of the motor 45 to prevent the high temperature of the workpiece 3 from affecting the motor 45 downward.

[0031] The piston 1 412 is fixedly mounted on the bottom end of the sealing column 1 43 , and the piston 2 53 is fixedly mounted on the bottom end of the sealing column 2 52 . The transmission fluid 7 is sealed against the bottom ends of the piston 2 53 and the piston 1 412 . like Figure 3 、 Figure 4 and Figure 8 As shown, the bottom seal of piston 1 412 is filled with transmission fluid 7, which generates force interaction with piston 2 53 through transmission fluid 7. Since transmission fluid 7 cannot be compressed, its transmission of pressure is almost lossless. That is, when piston 2 53 moves downward, piston 1 412 can move upward, thereby realizing the upper and lower misalignment function of the material transport component and the support component.

[0032] The outer surface of the sealing column 1 43 is movably connected to a spring 413 located inside the fixed cylinder 1 42 . The two ends of the spring 413 are elastically connected to the fixed cylinder 1 42 and the piston 1 412 respectively. The spring 413 is compressed and arranged on the top of the piston 1 412 . like Figure 8As shown, the spring 413 is compressed and arranged above the piston 1 412, so that it generates downward pressure. As long as the piston 2 53 moves upward, the spring 413 will automatically suppress the piston 1 412 to move downward, so that the transmission fluid 7 between the piston 1 412 and the piston 2 53 can always be saturated.

[0033] The diameter of the gear 1 46 is larger than the diameter of the gear 2 410 , and the left-right distance between the inner walls of the through slot 55 is larger than the diameter of the gear 2 410 ; Gear 1 46 is larger than the diameter of gear 2 410 , which can speed up the rotation speed of gear 2 410 and contact sleeve 1 49 and improve the transport speed of workpiece 3 , while the inner wall of the through groove 55 allows gear 2 410 to pass up and down to avoid getting stuck.

[0034] The second contact sleeve 512 and the first contact sleeve 49 are both made of fireproof and high-temperature resistant materials, and the hardness of the second contact sleeve 512 and the first contact sleeve 49 is less than the hardness of the workpiece 3; The second contact sleeve 512 and the first contact sleeve 49 are both made of fireproof and high temperature resistant materials, which can withstand temperatures up to 2000°C and instantaneous temperatures of 1600°C, which is much higher than the 900°C-1100°C reached by the workpiece 3 after being heated.

[0035] Working principle: When the device is working (if Figure 2 (This is the initial state of the device). First, the telescopic rod 9 is activated and drives the support frame 54 downward, causing the support assembly to move downward. The transmission fluid 7 located in the fixed cylinder 2 51 is pressed downward by the sealing column 2 52 and the piston 2 53, thereby forcing the transmission fluid 7 into the inner cavity of the fixed cylinder 1 42. Figure 3 、 Figure 9 As shown, the transmission fluid 7 gathers in the inner cavity of the fixed cylinder 42 and pushes the piston 412 and the sealing column 43 upward, causing the feeding assembly to move upward; Then, the workpiece 3 is passed through the high-frequency heating box 2 and placed on the top of the contact sleeve 49. At this time, the front and rear sides of the bottom of the outer surface of the workpiece 3 are limited by two groups of contact sleeves 512. Since the contact sleeve 49 bears most of the gravity of the workpiece 3, the friction between the workpiece 3 and the contact sleeve 512 is reduced. The motor 45 is started and the gear 46 is driven to rotate, and then the support column 47, the rotating drum 48 and the contact sleeve 49 are driven to rotate through the gear 2 410 to assist the workpiece 3 in moving, so that the workpiece 3 moves all the coverage areas of the high-frequency heating box 2. At this time, the telescopic rod 9 is controlled to move upward, and the contact sleeves 512 in the two groups of support mechanisms fully support the workpiece 3. Figure 9As shown, when the support frame 54 and the second piston 53 move upward, negative pressure is generated, and a portion of the transmission fluid 7 in the fixed cylinder 1 42 is drawn into the inner cavity of the fixed cylinder 2 51, so that the piston 1 412 drives the material transport assembly to move downward, so that the contact sleeve 1 49 is completely out of contact with the workpiece 3; Then, start the high-frequency heating box 2 to perform high-frequency heating on the workpiece 3, control the temperature of the workpiece 3 and the time it is at high temperature. At the same time, start the motor 2 57, and drive the support column 2 510, the rotating drum 2 511 and the contact sleeve 2 512 located on the front side to rotate, drive the workpiece 3 to rotate, so that the workpiece 3 is heated more evenly. Finally, turn off the high-frequency heating box 2 and transport the workpiece 3 to the cooling area. At this time, start the telescopic rod 9 to move downward again, so that the material transport component moves upward and the support component moves downward, so that the contact sleeve 1 49 and the contact sleeve 2 512 are in contact with the outer surface of the workpiece 3. At this time, start the motor 1 45 to realize the unloading operation of the workpiece 3.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A heat treatment device for thick-walled straight seam welded pipes, characterized in that: include: A workbench (1), wherein a plurality of high-frequency heating boxes (2) are installed on the top of the workbench (1); A transmission mechanism (4), the transmission mechanism (4) comprising a base (41) and a plurality of fixed cylinders (42), an inner sealing sleeve of the base (41) being provided with a sealing column (43) and a piston (412), a material transport assembly being installed at the top end of the sealing column (43); Transmission mechanism 2 (5), the transmission mechanism 2 (5) comprises four groups of fixed cylinders 2 (51) fixedly mounted at the four corners of the top of the base (41), the internal sealing sleeve of the fixed cylinder 2 (51) is provided with a sealing column 2 (52) and a piston 2 (53), the top of the sealing column 2 (52) is fixedly mounted with a support frame (54), the top of the support frame (54) is mounted with two groups of support assemblies, and the top of the support assembly is placed with a workpiece (3); A connecting pipe (8) is installed between the fixed cylinder 1 (42) and the plurality of fixed cylinder 2 groups (51). The inner cavities of the fixed cylinder 2 (51), the sealing column 2 (52) and the connecting pipe (8) are filled with a transmission fluid (7). A telescopic rod (9) is installed on the top of the base (41). The telescopic end of the telescopic rod (9) is fixedly connected to the support frame (54).

2. A heat treatment device for thick-walled straight seam welded pipe according to claim 1, characterized in that: The top of the workbench (1) is provided with a plurality of placement slots (6), the transmission mechanism 1 (4) and the transmission mechanism 2 (5) are both located in the placement slots (6), the top of the support frame (54) is provided with a through slot (55), the material transport assembly is located in the through slot (55), and the fixing cylinder 1 (42) is fixedly installed on the top of the base (41).

3. The thick-walled straight seam welded pipe heat treatment device according to claim 2, characterized in that: The material transport assembly includes a mounting frame (44) fixedly mounted on the top of a sealing column (43), a motor (45) is mounted inside the mounting frame (44), a gear (46) is fixedly mounted on the output shaft of the motor (45), a support column (47) is rotatably mounted on the top of the mounting frame (44), a gear (410) is fixedly mounted on one end of the support column (47), a rotating drum (48) is fixedly mounted on the outer surface of the support column (47), and a contact sleeve (49) is fixedly sleeved on the outer surface of the rotating drum (48).

4. A heat treatment device for thick-walled straight seam welded pipe according to claim 3, characterized in that: The support assembly includes a fixed frame (56) fixedly mounted on the top of the support frame (54), a second support column (510) is rotatably mounted inside the fixed frame (56), a second rotating drum (511) is fixedly mounted on the outer surface of the second support column (510), a second contact sleeve (512) is fixedly sleeved on the outer surface of the second rotating drum (511), and the outer surface of the second contact sleeve (512) is in rolling contact with the workpiece (3), and a second motor (57) is mounted on the outer side of the fixed frame (56) at the front side, and the second motor (57) is transmission-connected to the second support column (510) at the front side.

5. The heat treatment device for thick-walled straight seam welded pipe according to claim 4, characterized in that: A protective cover (58) is also installed on the outer side of the front group of motor 2 (57), and a plurality of ventilation slots (59) are provided on the side of the protective cover (58) facing the rotating drum 2 (511). The protective cover (58) is adapted to wrap around the outer surface of the motor 2 (57).

6. The thick-walled straight seam welded pipe heat treatment device according to claim 5, characterized in that: A protective cover (411) is fixedly mounted on the middle portion of the inner wall of the mounting frame (44). The protective cover (411) is in a semicircular shape and covers the top of the motor 1 (45).

7. The thick-walled straight seam welded pipe heat treatment device according to claim 6, characterized in that: The piston 1 (412) is fixedly mounted on the bottom end of the sealing column 1 (43), the piston 2 (53) is fixedly mounted on the bottom end of the sealing column 2 (52), and the transmission fluid (7) is sealed against the bottom ends of the piston 2 (53) and the piston 1 (412).

8. The thick-walled straight seam welded pipe heat treatment device according to claim 7, characterized in that: The outer surface of the sealing column (43) is movably sleeved with a spring (413) located inside the fixed cylinder (42), and the two ends of the spring (413) are elastically connected to the fixed cylinder (42) and the piston (412) respectively, and the spring (413) is compressed and arranged on the top of the piston (412).

9. The thick-walled straight seam welded pipe heat treatment device according to claim 8, characterized in that: The diameter of the gear 1 (46) is greater than the diameter of the gear 2 (410), and the left-right spacing of the inner wall of the through groove (55) is greater than the diameter of the gear 2 (410).

10. The heat treatment device for thick-walled straight seam welded pipe according to claim 9, characterized in that: The second contact sleeve (512) and the first contact sleeve (49) are both made of fireproof and high-temperature resistant materials, and the hardness of the second contact sleeve (512) and the first contact sleeve (49) is less than the hardness of the workpiece (3).

Images