Rotary tool clamp for assembling double-layer process pipe

Abstract

The invention relates to the technical field of pipe clamps, in particular to a double-layer process pipe assembly rotating tool clamp which comprises a rack, a shell and an inner pipe clamping mechanism. A shell is installed at the end of the machine frame, a calibration mechanism and a rotating mechanism used for driving an inner pipe and an outer pipe to rotate synchronously are installed on the side wall of the shell, an inner pipe clamping mechanism is installed on the calibration mechanism, and a position adjusting mechanism used for adjusting the height and the front-back position of the outer pipe is further installed on the machine frame. After the position of the outer pipe is roughly adjusted through the position adjusting mechanism, the position of the outer pipe is rapidly calibrated through the calibration mechanism, so that the outer pipe and the inner pipe are coaxially distributed, the welding precision is guaranteed, a leveling instrument does not need to be used for measurement, multiple adjustment operations do not need to be carried out, the operation process is simplified, and the overall assembly efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of pipe fixtures, and in particular to a double-layer process pipe assembly rotating fixture. Background Art

[0002] Double-layer process pipes, also known as double-layer pipelines, are widely used in many industrial fields (such as semiconductor manufacturing, chemical industry, etc.). Compared with single-layer pipelines, their design and structure have many significant advantages such as enhanced safety, high sealing, and superior temperature control performance. Double-layer pipelines can effectively ensure the transmission of high-purity fluids, reduce leakage risks, and meet strict process requirements, thereby providing important support for the production of high-quality products.

[0003] The double-layer pipe is composed of an inner pipe and an outer pipe. In order to ensure the sealing and mechanical strength of the inner pipe and the outer pipe after they are connected, the inner pipe and the outer pipe are often fixed together by welding. Before welding, it is often necessary to manually put the outer pipe on the outside of the inner pipe, and then weld the inner pipe circumferentially to connect the inner and outer pipes together. In the above welding process, since the connection of the inner and outer pipes needs to be done manually, the deviation during operation is large, which can easily lead to inconsistent gap sizes between the inner and outer pipes after welding, affecting the stability of fluid transmission during the subsequent use of the double-layer pipe.

[0004] Of course, the inner tube and the outer tube can also be clamped separately by the clamp and then sleeved, and the coaxiality of the inner tube and the outer tube can be checked by measuring tools such as a spirit level after the sleeve is completed. After the coaxiality is determined, welding can be performed. However, after the assembly and welding are completed, the clamp needs to be adjusted in reverse to remove the inner and outer tubes. When assembling the next set of inner and outer tubes, the clamp needs to be adjusted again for clamping. During the entire operation, the clamp needs to be adjusted frequently, the operation is cumbersome, and it is difficult to ensure the clamping accuracy of the clamp during multiple adjustments. In addition, the efficiency of measuring the coaxiality using measuring tools is low, which will affect the overall efficiency of the welding operation.

[0005] In order to solve the above problems and improve the accuracy and efficiency of inner and outer pipe welding, the present application provides a double-layer process pipe assembly rotating fixture. Summary of the invention

[0006] In order to achieve the above-mentioned purpose, the present application provides a double-layer process pipe assembly rotating fixture, including a frame, a shell and an inner pipe clamping mechanism. The frame end is equipped with a shell, the side wall of the shell is equipped with a calibration mechanism and a rotating mechanism for driving the inner pipe and the outer pipe to rotate synchronously, the calibration mechanism is equipped with an inner pipe clamping mechanism, and the frame is also equipped with a position adjustment mechanism for adjusting the height and front and rear position of the outer pipe.

[0007] The calibration mechanism comprises a hollow mounting plate rotatably mounted on the left side of the shell, a plurality of distance plates circumferentially and evenly arranged on the left side of the mounting plate, and an adjustment component arranged in the mounting plate for adjusting the position of the distance plates.

[0008] The position adjustment mechanism includes a first adjustment component for adjusting the front and rear position of the outer tube, a second adjustment component for adjusting the height of the outer tube, and a supporting block symmetrically installed on the top of the second adjustment component. The sides of the front and rear symmetrical supporting blocks close to each other are inclined surfaces, and the front and rear symmetrical inclined surfaces are arranged in an inverted figure eight shape. The adjustable distance plate consists of a basic component fixedly connected to the sliding plate and an adjustable component slidably connected to the basic component.

[0009] Preferably, the inner tube clamping mechanism includes a reference cylinder fixedly mounted on the left side of the mounting plate, multiple groups of sliding rods are slidably mounted on the side wall of the reference cylinder along its circumferential direction, a clamping plate is commonly mounted on one end of the sliding rods in the same group away from the axis of the reference cylinder, a movable plate is commonly mounted on one end of the sliding rods in the same group close to the axis of the reference cylinder, a side of the movable plate close to the axis of the reference cylinder is an inclined structure, and the thickness of the movable plate gradually increases from left to right, a pushing block is slidably mounted on one side of the multiple movable plates close to each other, a spring is connected between the movable plate and the reference cylinder, and a driving component for driving the pushing block to move is commonly installed between the reference cylinder and the mounting plate.

[0010] Preferably, the rotating mechanism includes a motor fixedly mounted on the inner wall of the shell, the motor output shaft is fixedly connected to the mounting shaft of the mounting disk through a coupling, a supporting ring is installed on the right side of the mounting disk, and an annular groove slidingly matched with the supporting ring is opened on the left side of the shell.

[0011] Preferably, the adjustment assembly includes a plurality of adjustment grooves evenly arranged along the circumference of the left side of the mounting plate and a sliding plate slidably installed inside the mounting plate, the distance plate is slidably connected to the adjustment groove, and the distance plate is fixedly connected to the sliding plate, an adjustment rod is rotatably installed on the sliding plate, and the adjustment rod is threadedly connected to the mounting plate.

[0012] Preferably, the first positioning assembly includes a movable base plate which is slidably mounted on the frame left and right and has a hollow structure, a screw is rotatably mounted inside the movable base plate, a front end of the screw rod penetrates the movable base plate and is fixedly mounted with a first rotating wheel, a sliding seat is threadedly connected to the screw rod, and the sliding seat is slidably connected to the movable base plate.

[0013] Preferably, the second positioning assembly includes two guide cylinders symmetrically installed on the sliding seat through a connecting block, a lifting rod is installed with an internal thread of the guide cylinder, a horizontal plate is arranged above the guide cylinder, the lifting rod is rotatably connected to the horizontal plate, the horizontal plate is a hollow structure, an adjusting shaft is rotatably installed in the horizontal plate, the rear end of the adjusting shaft passes through the horizontal plate and is fixedly installed with a second rotating wheel, the part of the adjusting shaft located in the horizontal plate is symmetrically fixedly installed with a vertical bevel gear, and a horizontal bevel gear meshing with the vertical bevel gear is fixedly installed on the upper end of the lifting rod.

[0014] Preferably, the driving assembly includes a pushing rod fixedly mounted on the right side of the pushing block and a rotating cylinder rotatably mounted inside the mounting plate, the pushing rod is threadedly connected to the reference cylinder, the inner wall of the rotating cylinder and the side wall of the pushing rod are slidably connected left and right, a driven bevel gear is fixedly mounted on the outer wall of the rotating cylinder, a driving rod is threadedly mounted on the side wall of the mounting plate, the driving rod is slidably connected to the inner wall of a hollow rod rotatably mounted inside the mounting plate, and an active bevel gear meshing with the driven bevel gear is installed at one end of the hollow rod close to the rotating cylinder.

[0015] Preferably, the distance plate is divided into two types: fixed and adjustable, wherein the adjustable distance plate is composed of a base member fixedly connected to the sliding plate and an adjustable member slidably connected to the base member, a clamping block is slidably arranged between the base member and the adjustable member, and the left end of the clamping block is chamfered.

[0016] Preferably, the clamping plate is divided into two types: integrated type and split type, wherein the split clamping plate consists of a fixing part fixedly connected to the sliding rod and an adjusting part slidably connected to the fixing part, a clip strip is slidably arranged between the fixing part and the adjusting part, the left end of the clip strip is chamfered, and the right end of the clip strip is located inside the mounting plate and slidably connected to the mounting plate.

[0017] Preferably, a push rod is installed at the right end of the card strip, and the end of the push rod away from the card strip is located outside the mounting plate, and a waist-shaped groove is provided on the side wall of the push rod away from the card strip, and a positioning block slidably connected to the waist-shaped groove is slidably installed on the side wall of the mounting plate, and a positioning plate fixedly connected to the mounting plate is provided on the rear side of the positioning block, and positioning holes are provided on the positioning block and the positioning plate, and a pin is inserted between the two positioning holes, and a synchronization rod fixedly connected to the right end of the card block is slidably installed on the right side of the push rod.

[0018] It can be seen from the above technical solutions that the present application has at least the following beneficial effects: 1. After the position of the outer tube is roughly adjusted by the position adjustment mechanism, the position of the outer tube is quickly calibrated by the calibration mechanism, so that the outer tube and the inner tube are coaxially distributed, thereby ensuring the accuracy of welding. There is no need to measure with a spirit level and perform multiple adjustment operations, which simplifies the operation process and improves the efficiency of the overall assembly.

[0019] 2. The present invention designs the clamping plate in the inner tube clamping mechanism and the distance plate in the calibration mechanism as a split adjustable structure, which makes it easier to remove the double-layer pipe after assembly and welding. It is also convenient to quickly fix the next group of inner and outer tubes without repeated adjustment of the clamp, shortening the time difference between the two assembly and welding operations, improving work efficiency, eliminating errors caused by repeated adjustment operations, and further ensuring the accuracy of assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of this application.

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of this application from another viewing angle.

[0023] Figure 3 This is a schematic diagram of the forward sectional structure of the housing, clamping plate, rotating mechanism, etc. of this application.

[0024] Figure 4 For this application Figure 3 Enlarged view of point A in the middle.

[0025] Figure 5 For this application Figure 3 Enlarged view of point B in the middle.

[0026] Figure 6 This is a schematic diagram of the top cross-sectional structure of the driving rod, distance plate, pushing rod, etc. of this application.

[0027] Figure 7 This is a schematic diagram of the side cross-sectional structure of the movable substrate, screw rod, sliding seat, etc. of this application.

[0028] Figure 8 For this application Figure 2 Enlarged view of point C in the middle.

[0029] In the figure: 1, frame; 2, shell; 3, inner tube clamping mechanism; 31, reference cylinder; 32, sliding rod; 33, clamping plate; 331, fixing member; 332, adjusting member; 333, clamping strip; 334, push rod; 335, positioning block; 336, positioning plate; 337, synchronization rod; 34, moving plate; 35, pushing block; 36, driving assembly; 361, rotating cylinder; 362, driving rod; 363, driven bevel gear; 364, hollow rod; 365, driving bevel gear; 366, pushing rod; 4, calibration mechanism; 41, mounting plate; 42. Distance plate; 421. Base member; 422. Adjustable member; 423. Block; 43. Adjustment assembly; 431. Sliding plate; 432. Adjustment rod; 5. Rotation mechanism; 51. Motor; 52. Support ring; 6. Position adjustment mechanism; 61. First positioning assembly; 611. Screw rod; 612. Sliding seat; 613. Moving base plate; 62. Second positioning assembly; 621. Guide cylinder; 622. Lifting rod; 623. Horizontal plate; 624. Position adjustment shaft; 625. Vertical bevel gear; 626. Horizontal bevel gear; 63. Support block. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] See also Figure 1 and Figure 3 A double-layer process pipe assembly rotating fixture comprises a frame 1, a shell 2 and an inner pipe clamping mechanism 3. The shell 2 is installed at the end of the frame 1, and a calibration mechanism 4 and a rotating mechanism 5 for driving the inner pipe and the outer pipe to rotate synchronously are installed on the side wall of the shell 2. The inner pipe clamping mechanism 3 is installed on the calibration mechanism 4. The frame 1 is also equipped with a position adjustment mechanism 6 for adjusting the height and front and rear position of the outer pipe.

[0032] See also Figure 2 and Figure 3 The calibration mechanism 4 includes a mounting plate 41 which is rotatably mounted on the left side of the shell 2 and has a hollow structure, a plurality of distance plates 42 which are evenly arranged on the left side of the mounting plate 41 in the circumferential direction, and an adjustment component 43 which is arranged in the mounting plate 41 and is used to adjust the position of the distance plates 42. The left end of the distance plates 42 is chamfered.

[0033] See also Figure 1The position adjustment mechanism 6 includes a first adjustment component 61 for adjusting the front and rear position of the outer tube, a second adjustment component 62 for adjusting the height of the outer tube, and a support block 63 symmetrically installed on the top of the second adjustment component 62. The side of the front and rear symmetrical support blocks 63 close to each other is an inclined surface, and the front and rear symmetrical inclined surfaces are arranged in an inverted eight shape.

[0034] During operation, the outer tube is first placed between the front and rear symmetrical supporting blocks 63, and the height and front and rear position of the supporting block 63 are roughly adjusted by the first adjustment component 61 and the second adjustment component 62, so that the outer tube and the inner tube are initially aligned. Then, the position adjustment mechanism 6 drives the outer tube to move to the right, so that the outer tube is sleeved on the outside of the clamped inner tube, and the position of the outer tube is calibrated by the calibration mechanism 4. According to the calibrated position of the outer tube, the position of the supporting block 63 is finely adjusted again by the first adjustment component 61 and the second adjustment component 62, so that the outside of the outer tube is stably supported. When the welding of the inner and outer tubes is completed and the double-layer pipe after welding is removed, the next outer tube is directly placed on the supporting block 63, so that the inner and outer tubes can be coaxially arranged. While ensuring the welding accuracy, there is no need for repeated adjustments, and there is no need to use measuring tools such as spirit levels for measurement and inspection, which effectively simplifies the operation process and improves work efficiency.

[0035] See also Figure 1 , Figure 2 and Figure 3 The inner tube clamping mechanism 3 includes a reference cylinder 31 fixedly mounted on the left side of the mounting plate 41, and a plurality of groups of sliding rods 32 are slidably mounted on the side wall of the reference cylinder 31 along its circumferential direction. A clamping plate 33 is commonly mounted on the end of the same group of sliding rods 32 away from the axis of the reference cylinder 31, and a moving plate 34 is commonly mounted on the end of the same group of sliding rods 32 close to the axis of the reference cylinder 31. The side of the moving plate 34 close to the axis of the reference cylinder 31 is an inclined structure, and the thickness of the moving plate 34 gradually increases from left to right. A pushing block 35 is slidably mounted on the side where the plurality of moving plates 34 are close to each other, a spring is connected between the moving plate 34 and the reference cylinder 31, and a driving component 36 for driving the pushing block 35 to move is commonly installed between the moving plate 34 and the pushing block 35.

[0036] After the inner tube is sleeved on the outside of the reference tube 31, the pushing block 35 is driven to move left and right by the driving assembly 36 to adjust the clamping range of the clamping plate 33 according to the inner diameter of the inner tube, so that the multiple clamping plates 33 can firmly clamp the inner tube from the inside and ensure that the clamped inner tube is coaxial with the reference tube 31.

[0037] See also Figure 3 and Figure 6The driving assembly 36 includes a pushing rod 366 fixedly mounted on the right side of the pushing block 35 and a rotating cylinder 361 rotatably mounted inside the mounting disk 41. The pushing rod 366 is threadedly connected to the reference cylinder 31. The inner wall of the rotating cylinder 361 and the side wall of the pushing rod 366 are slidably connected left and right. A driven bevel gear 363 is fixedly mounted on the outer wall of the rotating cylinder 361. A driving rod 362 is threadedly mounted on the side wall of the mounting disk 41. The driving rod 362 is slidably connected to the inner wall of a hollow rod 364 rotatably mounted inside the mounting disk 41. An active bevel gear 365 meshing with the driven bevel gear 363 is installed at one end of the hollow rod 364 close to the rotating cylinder 361. A cylindrical groove for avoiding the pushing rod 366 is penetrated at the left end of the mounting shaft of the mounting disk 41.

[0038] When the clamping range of the clamping plate 33 needs to be adjusted, the driving rod 362 is manually rotated, and the driving rod 362 drives the hollow rod 364 to rotate synchronously. At the same time, the driving rod 362 slides relative to the inner wall of the hollow rod 364, so that the hollow rod 364 only drives the active bevel gear 365 to rotate, and then drives the rotating cylinder 361 to rotate through the meshing transmission of the active bevel gear 365 and the driven bevel gear 363. Through the sliding connection between the rotating cylinder 361 and the driving rod 362 and the threaded connection between the driving rod 362 and the reference cylinder 31, the driving rod 362 drives the pushing block 35 to move left or right while rotating.

[0039] When the pushing block 35 moves to the left, it drives the multiple moving plates 34 closer to each other, and then drives the clamping plates 33 closer to each other through the sliding rod 32 to adapt to the inner tube with a smaller inner diameter. Conversely, when the pushing block 35 moves to the right, it drives the multiple clamping plates 33 away from each other to adapt to the inner tube with a larger inner diameter.

[0040] See also Figure 3 The adjustment component 43 includes a plurality of adjustment grooves evenly arranged along the circumference of the left side of the mounting plate 41 and a sliding plate 431 slidably installed inside the mounting plate 41. The distance plate 42 is slidably connected to the adjustment groove, and the distance plate 42 is fixedly connected to the sliding plate 431. An adjustment rod 432 is rotatably installed on the sliding plate 431, and the adjustment rod 432 is threadedly connected to the mounting plate 41.

[0041] After the outer tube position is roughly adjusted by the first position adjustment component 61 and the second position adjustment component 62, the outer tube can be driven to move to the right by pushing the movable base plate 613. When the right end of the outer tube moves to the outside of the distance plate 42, the adjustment rod 432 is manually rotated, and the adjustment rod 432 drives the distance plate 42 to slide through the sliding plate 431, so as to adjust the position of the distance plate 42 according to the inner diameter of the outer tube, until the distance plate 42 is in close contact with the inner wall of the outer tube. At this time, the outer tube is fixed, and the outer tube and the inner tube are arranged coaxially. At the same time, according to the position of the outer tube at this time, the first position adjustment component 61 and the second position adjustment component 62 can be adjusted again, so that the support block 63 is in close contact with the outer wall of the outer tube, thereby ensuring the position stability of the outer tube during the welding process through the two methods of internal clamping and external support, thereby ensuring the welding accuracy. In order to ensure the accuracy of adjustment, a scale line can be set at the corresponding position of the mounting plate 41.

[0042] See also Figure 1 , Figure 2 and Figure 7 The first positioning assembly 61 includes a hollow movable base plate 613 which is slidably mounted on the frame 1, a screw rod 611 is symmetrically mounted in the movable base plate 613, a front end of the screw rod 611 penetrates the movable base plate 613 and is fixedly mounted with a first rotating wheel, a sliding seat 612 is threadedly connected to the screw rod 611, and the sliding seat 612 is slidably connected to the movable base plate 613.

[0043] The screw rod 611 is driven to rotate by rotating the first rotating wheel, and the screw rod 611 adjusts the front-to-back position of the sliding seat 612, thereby realizing the adjustment of the front-to-back position of the outer tube.

[0044] See also Figure 2 and Figure 7 The second positioning assembly 62 includes two guide cylinders 621 symmetrically mounted on the sliding seat 612 through a connecting block, a lifting rod 622 is installed on the internal thread of the guide cylinder 621, a horizontal plate 623 is arranged above the guide cylinder 621, the lifting rod 622 is rotatably connected to the horizontal plate 623, the horizontal plate 623 is a hollow structure, the supporting block 63 is installed on the horizontal plate 623, a positioning shaft 624 is rotatably installed in the horizontal plate 623, the rear end of the positioning shaft 624 passes through the horizontal plate 623 and is fixedly mounted with a second rotating wheel, the part of the positioning shaft 624 located in the horizontal plate 623 is symmetrically fixedly mounted with a vertical bevel gear 625, and a horizontal bevel gear 626 meshing with the vertical bevel gear 625 is fixedly mounted on the upper end of the lifting rod 622.

[0045] By rotating the second rotating wheel to drive the adjusting shaft 624 to rotate, the vertical bevel gear 625 on the adjusting shaft 624 drives the corresponding horizontal bevel gear 626 to rotate synchronously, and the lifting rod 622 will move up and down relative to the guide cylinder 621 during the rotation of the horizontal bevel gear 626, thereby realizing the adjustment of the height of the outer tube.

[0046] See also Figure 3 The rotating mechanism 5 includes a motor 51 fixedly mounted on the inner wall of the shell 2. The output shaft of the motor 51 is fixedly connected to the mounting shaft of the mounting disk 41 through a coupling. A supporting ring 52 is installed on the right side of the mounting disk 41, and an annular groove that slides with the supporting ring 52 is opened on the left side of the shell 2.

[0047] The starter motor 51 rotates the mounting plate 41 and the reference cylinder 31 through the mounting shaft, thereby causing the inner tube clamped on the inner tube clamping mechanism 3 and the outer tube supported by the position adjustment mechanism 6 and clamped and positioned in the calibration mechanism 4 to rotate synchronously, so as to cooperate with the external welding equipment to complete the welding operation of the inner and outer tubes. In order to reduce the friction during the rotation of the outer tube, a ball bearing can be provided on the contact surface between the supporting block 63 and the outer tube.

[0048] See also Figure 3 and Figure 5 The distance plate 42 is divided into two types: fixed and adjustable. The adjustable distance plate 42 is composed of a base member 421 fixedly connected to the sliding plate 431 and an adjustable member 422 slidably connected to the base member 421. A block 423 is slidably arranged between the base member 421 and the adjustable member 422, and the left end of the block 423 is chamfered.

[0049] See also Figure 3 and Figure 4 The clamping plate 33 is divided into two types: an integrated type and a split type. The split type clamping plate 33 is composed of a fixing member 331 fixedly connected to the sliding rod 32 and an adjusting member 332 slidably connected to the fixing member 331. A clamping strip 333 is slidably arranged between the fixing member 331 and the adjusting member 332. The left end of the clamping strip 333 is chamfered, and the right end of the clamping strip 333 is located inside the mounting disk 41 and is slidably connected to the mounting disk 41.

[0050] See also Figure 3 , Figure 4 , Figure 5 and Figure 8 The right end of the card strip 333 is equipped with a push rod 334, and the end of the push rod 334 away from the card strip 333 is located outside the mounting plate 41, and a waist-shaped groove is provided on the side wall of the push rod 334 away from the card strip 333, and a positioning block 335 slidably connected to the waist-shaped groove is slidably installed on the side wall of the mounting plate 41. When the position of the clamping plate 33 is adjusted, the push rod 334 will slide relative to the positioning block 335, and a positioning plate 336 fixedly connected to the mounting plate 41 is provided on the rear side of the positioning block 335. Positioning holes are provided on the positioning block 335 and the positioning plate 336, and a pin is inserted between the two positioning holes. A synchronization rod 337 fixedly connected to the right end of the card block 423 is slidably installed on the right side of the push rod 334. When the position of the spacing plate 42 is adjusted, the synchronization rod 337 will slide relative to the push rod 334.

[0051] It should be noted that the right end of the fixing member 331 is located to the right of the right end of the adjusting member 332, and the fixing member 331 is slidably connected to the card strip 333 by a sliding groove slider (not shown in the figure). When the card strip 333 moves to the right and does not contact the adjusting member 332, the fixing member 331 can limit the card strip 333 to prevent the push rod 334 from being unable to accurately align with the gap between the adjusting member 332 and the fixing member 331, thereby causing the card strip 333 to be unable to be accurately reset. Similarly, the card block 423 is slidably connected to the adjustable member 422 and the sliding plate 431 by a sliding groove slider (not shown in the figure), so that the card block 423 that moves to the right and does not contact the adjustable member 422 can be limited by the sliding plate 431.

[0052] When the double-layer pipe needs to be removed after welding is completed, first remove the pin between the two positioning holes, and then push the positioning block 335 to move the push rod 334 to the right, so that the clamping strip 333 is no longer in contact with the adjusting member 332, and under the connecting action of the synchronization rod 337, the clamping block 423 is no longer in contact with the adjustable member 422. At this time, the internal supporting force of the adjusting member 332 and the adjustable member 422 on the inner tube and the outer tube is reduced, so the corresponding clamping plate 33 is no longer in close contact with the inner wall of the inner tube, and the corresponding distance plate 42 is no longer in close contact with the inner wall of the outer tube, thereby reducing the friction when the double-layer pipe is removed, simplifying the operation and avoiding wear of the pipe. It should be noted that a return spring (not shown in the figure) can also be connected between the adjusting member 332 and the fixing member 331 and between the adjustable member 422 and the base member 421. When the clamping strip 333 and the clamping block 423 are pulled out to the right, the return spring can move the adjusting member 332 away from the inner wall of the inner tube and the adjustable member 422 away from the inner wall of the outer tube.

[0053] When the next group of inner and outer tubes need to be assembled and welded, the inner tube is first sleeved on the outside of the plurality of clamping plates 33, and then the outer tube is sleeved on the outside of the plurality of distance plates 42, and then the positioning block 335 is pushed to move to the left, so that the push rod 334 drives the clamping strip 333 and the clamping plate to reset, that is, the clamping strip 333 is inserted between the fixing member 331 and the adjusting member 332, and the clamping block 423 is inserted between the base member 421 and the adjustable member 422, so that the clamping plate 33 is again in close contact with the inner wall of the inner tube, and the distance plate 42 is again in close contact with the inner wall of the outer tube. Through the arrangement of the above structure, before the welded double-layer pipe needs to be removed, there is no need to reversely adjust the clamping plate 33 and the distance plate 42, and before the next group of corresponding inner and outer tubes are welded, there is no need to adjust the position of the clamping plate 33 and the distance plate 42 again, which effectively simplifies the operation process.

[0054] As an embodiment, the number of the distance plates 42 and the clamping plates 33 is four and evenly distributed in the circumferential direction, wherein the number of the adjustable distance plates 42 and the split clamping plates 33 are both two, and two adjustable distance plates 42 and two split clamping plates 33 are adjacently distributed (the interval angle between adjacent adjustable distance plates 42 and adjacent split clamping plates 33 is 90 degrees). To further improve the ease of operation, the two push rods 334 can also be connected by a connecting piece, so that the left and right positions of the two push rods 334 can be adjusted at one time.

[0055] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A double-layer process pipe assembly rotary fixture, comprising a frame (1), a shell (2) and an inner pipe clamping mechanism (3), characterized in that: A shell (2) is installed at the end of the frame (1); a calibration mechanism (4) and a rotation mechanism (5) for driving the inner tube and the outer tube to rotate synchronously are installed on the side wall of the shell (2); an inner tube clamping mechanism (3) is installed on the calibration mechanism (4); and a position adjustment mechanism (6) for adjusting the height and front-back position of the outer tube is also installed on the frame (1); The calibration mechanism (4) comprises a mounting plate (41) which is rotatably mounted on the left side of the housing (2) and has a hollow structure, a plurality of distance plates (42) which are evenly arranged on the left side of the mounting plate (41) in a circumferential direction, and an adjustment component (43) which is arranged in the mounting plate (41) and is used to adjust the position of the distance plates (42); the distance plates (42) are divided into two types: fixed type and adjustable type, and the adjustable distance plates (42) are composed of a base member (421) which is fixedly connected to a sliding plate (431) and an adjustable member (422) which is slidably connected to the base member (421); The position adjustment mechanism (6) comprises a first position adjustment component (61) for adjusting the front-rear position of the outer tube, a second position adjustment component (62) for adjusting the height of the outer tube, and a support block (63) symmetrically mounted on the top of the second position adjustment component (62), wherein the sides of the front-rear symmetrical support blocks (63) close to each other are inclined surfaces, and the front-rear symmetrical inclined surfaces are arranged in an inverted figure eight shape.

2. A double-layer process pipe assembly rotating fixture as claimed in claim 1, characterized in that: The inner tube clamping mechanism (3) comprises a reference cylinder (31) fixedly mounted on the left side of the mounting plate (41); a plurality of groups of sliding rods (32) are slidably mounted on the side wall of the reference cylinder (31) along its circumferential direction; a clamping plate (33) is commonly mounted on one end of the sliding rods (32) of the same group away from the axis of the reference cylinder (31); a moving plate (34) is commonly mounted on one end of the sliding rods (32) of the same group close to the axis of the reference cylinder (31); a side of the moving plate (34) close to the axis of the reference cylinder (31) is an inclined surface structure, and the thickness of the moving plate (34) gradually increases from left to right; a pushing block (35) is slidably mounted on one side of the plurality of moving plates (34) close to each other; a spring is connected between the moving plate (34) and the reference cylinder (31); and a driving assembly (36) for driving the pushing block (35) to move is commonly mounted between the reference cylinder (31) and the mounting plate (41).

3. A double-layer process pipe assembly rotating fixture as claimed in claim 1, characterized in that: The adjustment assembly (43) comprises a plurality of adjustment grooves uniformly arranged along the circumference of the left side of the mounting plate (41) and a sliding plate (431) slidably mounted inside the mounting plate (41); the distance plate (42) is slidably connected to the adjustment grooves, and the distance plate (42) is fixedly connected to the sliding plate (431); an adjustment rod (432) is rotatably mounted on the sliding plate (431), and the adjustment rod (432) is threadedly connected to the mounting plate (41).

4. A double-layer process pipe assembly rotating fixture as claimed in claim 2, characterized in that: The first positioning assembly (61) comprises a movable base plate (613) which is slidably mounted on the frame (1) and has a hollow structure. A screw rod (611) is rotatably mounted inside the movable base plate (613). The front end of the screw rod (611) passes through the movable base plate (613) and is fixedly mounted with a first rotating wheel. A sliding seat (612) is threadedly connected to the screw rod (611). The sliding seat (612) is slidably connected to the movable base plate (613).

5. A double-layer process pipe assembly rotating fixture as claimed in claim 4, characterized in that: The second positioning assembly (62) comprises two guide cylinders (621) symmetrically mounted on the sliding seat (612) via a connecting block, a lifting rod (622) being mounted on the internal thread of the guide cylinder (621), a horizontal plate (623) being arranged above the guide cylinder (621), the lifting rod (622) being rotatably connected to the horizontal plate (623), the horizontal plate (623) being a hollow structure, a positioning shaft (624) being rotatably mounted in the horizontal plate (623), the rear end of the positioning shaft (624) penetrating the horizontal plate (623) and being fixedly mounted with a second rotating wheel, a part of the positioning shaft (624) located in the horizontal plate (623) being symmetrically fixedly mounted with a vertical bevel gear (625), and a horizontal bevel gear (626) meshing with the vertical bevel gear (625) being fixedly mounted on the upper end of the lifting rod (622).

6. A double-layer process pipe assembly rotating fixture as claimed in claim 2, characterized in that: The driving assembly (36) comprises a pushing rod (366) fixedly mounted on the right side of the pushing block (35) and a rotating cylinder (361) rotatably mounted inside the mounting plate (41); the pushing rod (366) is threadedly connected to the reference cylinder (31); the inner wall of the rotating cylinder (361) and the side wall of the pushing rod (366) are slidably connected left and right; a driven bevel gear (363) is fixedly mounted on the outer wall of the rotating cylinder (361); a driving rod (362) is threadedly mounted on the side wall of the mounting plate (41); the driving rod (362) is slidably connected to the inner wall of a hollow rod (364) rotatably mounted inside the mounting plate (41); and an active bevel gear (365) meshing with the driven bevel gear (363) is mounted on one end of the hollow rod (364) close to the rotating cylinder (361).

7. A double-layer process pipe assembly rotating fixture as claimed in claim 4, characterized in that: A clamping block (423) is slidably arranged between the base member (421) and the adjustable member (422), and the left end of the clamping block (423) is chamfered.

8. A double-layer process pipe assembly rotating fixture as claimed in claim 7, characterized in that: The clamping plate (33) is divided into two types: an integrated type and a split type. The split type clamping plate (33) is composed of a fixing member (331) fixedly connected to the sliding rod (32) and an adjusting member (332) slidably connected to the fixing member (331). A clamping strip (333) is slidably arranged between the fixing member (331) and the adjusting member (332). The left end of the clamping strip (333) is chamfered, and the right end of the clamping strip (333) is located inside the mounting plate (41) and is slidably connected to the mounting plate (41).

9. A double-layer process pipe assembly rotating fixture as claimed in claim 8, characterized in that: A push rod (334) is installed at the right end of the clamping strip (333), and one end of the push rod (334) away from the clamping strip (333) is located outside the mounting plate (41), and a waist-shaped groove is provided on the side wall of the push rod (334) away from the clamping strip (333). A positioning block (335) slidably connected to the waist-shaped groove is slidably installed on the side wall of the mounting plate (41), and a positioning plate (336) fixedly connected to the mounting plate (41) is provided at the rear side of the positioning block (335). Positioning holes are provided on the positioning block (335) and the positioning plate (336), and a latch is inserted between the two positioning holes. A synchronization rod (337) fixedly connected to the right end of the clamping block (423) is slidably installed on the right side of the push rod (334).

10. A double-layer process pipe assembly rotating fixture as claimed in claim 1, characterized in that: The rotating mechanism (5) comprises a motor (51) fixedly mounted on the inner wall of the housing (2); the output shaft of the motor (51) is fixedly connected to the mounting shaft of the mounting plate (41) via a coupling; a supporting ring (52) is mounted on the right side of the mounting plate (41); and an annular groove slidably matched with the supporting ring (52) is provided on the left side of the housing (2).

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