Lathe fixture for pipe joint of waste heat boiler

Abstract

The invention relates to a lathe fixture for a waste heat boiler pipe joint, and belongs to the technical field of boiler equipment. The clamp comprises a bottom plate capable of being clamped and fixed through a chuck, a first clamping jaw arranged at the end, away from the chuck, of the bottom plate and a second clamping jaw arranged on the bottom plate and located at the inclined position of the first clamping jaw, and the bottom plate is a perforated plate with through holes formed in the plate face. The first clamping jaw is used for clamping the short straight pipe section of the pipe joint and enabling the center line of the short straight pipe section of the pipe joint to be coaxial with the center line of the chuck. The second clamping jaw is positioned through the through hole and used for clamping the long straight pipe section of the pipe joint. The pipe joint machining tool is simple in structure and easy to operate, the problems that one tool can only machine pipe joints with one pipe diameter and one pipe bending angle, and the tool does not have universality are solved, and the machining cost is greatly reduced.

Description

Technical Field

[0001] The invention relates to a lathe clamp for a waste heat boiler pipe joint and belongs to the technical field of boiler equipment. Background Art

[0002] During the manufacturing process of the pipe joints of the waste heat boiler, due to the special structure of some pipe joints, the bending straight section is short. According to the previous processing method, the pipe cannot be bent after the pipe joint groove is processed. Therefore, it is necessary to adopt a processing technology of bending the pipe first and then processing the pipe joint groove. The existing pipe joint clamps are as follows Figure 1 As shown, a pipe groove in the shape of a pipe joint 11 is milled out of a whole metal base plate 10, the pipe joint 11 is placed in the pipe groove, and then clamped with a metal clamping plate 12. The metal base plate 10 is then clamped and fixed by a lathe chuck, and the groove is processed by a turning tool.

[0003] The main defects of the above-mentioned clamp are: (1) the metal base plate 10 needs to be milled with a pipe groove by a milling machine, which has a high processing cost; (2) the clamp is not universal, and a separate clamp needs to be made for pipe joints of different specifications and different angles; (3) the pipe joint needs to match the pipe groove on the metal base plate 10, and the bending processing accuracy of the pipe joint is required to be high.

[0004] Therefore, developing a lathe fixture which has a simple structure, is easy to operate, easy to install and debug, has strong versatility, and can process pipe joints with different outer diameters and different bending angles meets the actual needs of pipe joint processing. Summary of the invention

[0005] The present invention mainly solves the problems in the prior art that the lathe fixture is not universal when processing the groove of the waste heat boiler pipe joint, and the operation is difficult and the processing cost is high. The invention provides a lathe fixture for the waste heat boiler pipe joint which has a simple structure, is easy to operate, and can process pipe joints of different specifications of outer diameters and different bending angles.

[0006] The present invention solves the above-mentioned technical problems mainly through the following technical solutions: the present invention includes a base plate that can be clamped and fixed by a chuck, characterized in that the base plate adopts a porous plate with through holes arranged on the plate surface, and also includes a first clamping jaw positioned through the through holes and installed on one end of the base plate away from the chuck, and a second clamping jaw installed at an oblique position of the first clamping jaw, the first clamping jaw is used to clamp the short straight pipe section of the pipe joint, and the second clamping jaw is used to clamp the long straight pipe section of the pipe joint, and the pipe joint can be clamped and fixed to the base plate by the first clamping jaw and the second clamping jaw.

[0007] Preferably, the second clamp includes a U-shaped mounting seat fixedly connected to the base plate at the through hole by connecting bolts, a clamping component installed in the hollow position inside the U-shaped mounting seat, and a screw mechanism disposed at the raised positions at both ends of the U-shaped mounting seat. The clamping component is driven by the screw mechanism to clamp or loosen the long straight pipe section of the pipe joint.

[0008] Preferably, the clamping component includes a pair of clamping blocks with openings facing each other, the clamping blocks are slidably connected to the U-shaped mounting seat through a sliding mechanism, the sliding mechanism includes L-shaped guide rods arranged on the outer walls on both sides of the clamping block, and guide grooves parallel to the base plate are arranged on both sides of the bottom of the U-shaped mounting seat, the L-shaped guide rod has a protrusion embedded in the guide groove, and the two clamping blocks can be driven by a screw mechanism to move toward or away from each other along the guide groove.

[0009] Preferably, the screw mechanism includes a driving screw threadedly connected to the top plate of the U-shaped mounting seat, two threaded rods fixedly connected to the clamping block at one end, and gears sleeved on the threaded rods. The threaded rods are threadedly connected to the side plates of the U-shaped mounting seat, and the driving screw meshes with the gear teeth between the two gears. When the driving screw rotates, the threaded rod is driven to rotate by the gear and the clamping block is driven to move along the guide groove by the threaded rod.

[0010] Preferably, the first clamping jaw comprises an upper clamping jaw and a lower clamping jaw with openings facing each other, an adjusting stud threadedly connected to the upper clamping jaw and the lower clamping jaw, the lower clamping jaw is fixed to the base plate, and the opening spacing between the upper clamping jaw and the lower clamping jaw is adjusted by the adjusting stud.

[0011] Preferably, the first clamping jaw further comprises guide posts arranged in parallel on both sides of the adjusting stud, the guide posts are fixedly connected to the upper clamping jaw and pass through the lower clamping jaw and the bottom plate.

[0012] Preferably, it also includes an angle adjustment mechanism installed on the base plate and located on the side of the U-shaped mounting seat, and the angle adjustment mechanism is used to limit the rotation of the U-shaped mounting seat relative to the base plate.

[0013] Preferably, the angle adjustment mechanism includes a clamping block fixed to the base plate by an adjusting bolt, a pressure plate provided with an adjusting groove, the width of the adjusting groove matches the outer diameter of the adjusting bolt, the pressure plate is fixedly connected to the base plate by bolts and connected to the clamping block in the adjusting groove by the adjusting bolt, one end of the clamping block is threadedly connected to the adjusting bolt and the other end is abutted against the side wall of the U-shaped mounting seat, when the adjusting bolt moves along the adjusting groove, the clamping block rotates with the adjusting bolt as the axis, and when the clamping block is fastened to the base plate by the pressure plate and the adjusting bolt, the U-shaped mounting seat is limited from rotating relative to the base plate.

[0014] The present invention has a simple structure and has the following advantages: The present invention adopts a porous plate with through holes arranged on the plate surface as a bottom plate, and a first clamping jaw and a second clamping jaw are arranged on the bottom plate. The first clamping jaw and the second clamping jaw can be used to clamp the short straight pipe section and the long straight pipe section of the pipe joint respectively. The clamping jaws can be used for pipe joints with different pipe diameters, and the position and angle of the second clamping jaw can be adjusted to be used for pipe joints with different bending angles. Therefore, compared with the prior art, the present invention greatly increases the versatility of the clamp and reduces the cost of pipe joint groove processing.

[0015] Furthermore, the second clamping jaw includes a clamping component, a screw mechanism and a sliding mechanism, the screw mechanism is used to drive the clamping block, and the sliding mechanism is used to guide the clamping block to move along the guide groove, and the long straight pipe section of the pipe joint is clamped or loosened by controlling the relative movement of the two clamping blocks, and the structure is reasonable, simple and effective; Furthermore, the first clamping jaw includes an upper clamping jaw, a lower clamping jaw and an adjusting stud. The opening spacing between the upper clamping jaw and the lower clamping jaw is adjusted by adjusting the stud to achieve clamping or loosening of the short straight section of the pipe joint. The structure is simple and effective, and the operation is also relatively convenient.

[0016] Furthermore, an angle adjustment mechanism is provided on the side of the second clamping jaw, and the angle adjustment mechanism is provided with a clamp fixed to the base plate, and the clamp abuts against the U-shaped mounting seat. Through the cooperation of the clamp and the U-shaped mounting seat, the angle of the second clamping jaw can be adjusted and the second clamping jaw can be in an angular position that can accurately clamp the long straight pipe section of the pipe joint; when the second clamping jaw is adjusted to the opening of the clamping block and the long straight pipe section of the pipe joint, the clamp is fastened to the base plate by adjusting the bolt, and at this time the clamp can limit the rotation of the U-shaped mounting seat relative to the base plate, thereby ensuring that the second clamping jaw can accurately clamp the long straight pipe section of the pipe joint.

[0017] Therefore, the structure of the present invention is simple and reliable, the operation of installing and replacing the pipe joint is also relatively convenient, and it has the advantages of good versatility and low cost for processing the groove of the pipe joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is a structural schematic diagram of the prior art; Attached Figure 2 It is a structural schematic diagram of a preferred embodiment of the present invention; Attached Figure 3 is a schematic structural diagram of a first clamping jaw in a preferred embodiment of the present invention; Attached Figure 4 is a schematic structural diagram of a second clamping jaw in a preferred embodiment of the present invention; Attached Figure 5 It is a structural schematic diagram of an angle adjustment mechanism in a preferred embodiment of the present invention.

[0019] Explanation of the reference numerals: chuck 1; through hole 2; base plate 3; second jaw 4; first jaw 5; upper jaw 51; lower jaw 52; adjusting stud 53; guide column 54; angle adjustment mechanism 6; pressure plate 61; adjusting bolt 62; clamping block 63; adjusting groove 64; bolt 65; U-shaped mounting seat 7; clamping component 8; clamping block 81; L-shaped guide rod 82; protrusion 83; sliding mechanism 84; guide groove 85; screw mechanism 9; driving screw 91; threaded rod 92; gear 93; metal base plate 10; pipe joint 11; metal plate 12; connecting bolt 13. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0021] Embodiment 1: As attached Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 As shown, the present invention comprises a base plate 3 that can be clamped and fixed by a chuck 1, a first clamping jaw 5 that is positioned and installed on the base plate 3 at one end away from the chuck 1 through a through hole 2, and a second clamping jaw 4 that is installed at an oblique position of the first clamping jaw 5, an angle adjustment mechanism 6 that is installed on the base plate 3 and located at the side of a U-shaped mounting seat 7, and a pipe joint 11 that can be clamped and fixed to the base plate 3 by the first clamping jaw 5 and the second clamping jaw 4, and the center line of the short straight section of the pipe joint 11 is coaxial with the center line of the chuck 1; The bottom plate 3 is a porous plate with through holes 2 arranged on the plate surface; The second clamping jaw 4 is used to clamp the long straight pipe section of the pipe joint 11, and includes a U-shaped mounting seat 7 fixed to the through hole 2 by a connecting bolt 13, a clamping component 8 installed in the hollow position of the U-shaped mounting seat 7, and screw mechanisms 9 respectively arranged at the raised parts of both ends of the U-shaped mounting seat 7, and the clamping component 8 is controlled by the screw mechanism 9; The first clamping jaw 5 is used to clamp the short straight pipe section of the pipe joint 11, and includes an upper clamping jaw 51 and a lower clamping jaw 52 with openings facing each other, an adjusting stud 53 threadedly connected to the upper clamping jaw 51 and the lower clamping jaw 52, ​​and the lower clamping jaw 52 is fixed to the bottom plate 3. The opening and closing of the upper clamping jaw 51 and the lower clamping jaw 52 is controlled by rotating the adjusting stud 53; Guide pillars 54 are provided on both sides of the adjusting stud 53 and are parallel to the axial direction of the adjusting stud 53 and are fixedly connected to the upper clamping jaw 51 by screws. The guide pillars 54 penetrate the lower clamping jaw 52 and the bottom plate 3 and form a sliding connection with the lower clamping jaw 52. The angle adjustment mechanism 6 is installed on the bottom plate 3 at a position lateral to the U-shaped mounting seat 7, and includes a clamping block 63 fixed to the bottom plate 3 by an adjusting bolt 62, a pressing plate 61 provided with an adjusting groove 64, the groove width of the adjusting groove 64 matches the outer diameter of the adjusting bolt 62, the pressing plate 61 is fixedly connected to the bottom plate 3 by a bolt 65 and connected to the clamping block 63 in the adjusting groove 64 by the adjusting bolt 62, one end of the clamping block 63 is threadedly connected to the adjusting bolt 62 and the other end is against the side wall of the U-shaped mounting seat 7, when the adjusting bolt 62 moves along the adjusting groove 64, the clamping block 63 generates a rotation with the adjusting bolt 62 as the axis, and when the clamping block 63 is fastened to the bottom plate 3 by the pressing plate 61 and the adjusting bolt 62, the rotation of the U-shaped mounting seat 7 relative to the bottom plate 3 is limited; The clamping member 8 comprises two clamping blocks 81 with openings facing each other, and the clamping blocks 81 are slidably connected to the U-shaped mounting seat 7 via a sliding mechanism 84; The sliding mechanism 84 includes L-shaped guide rods 82 disposed on the outer walls of both sides of the clamping block 81, and guide grooves 85 disposed on both sides of the bottom of the U-shaped mounting seat 7. The protrusions 83 at the lower end of the L-shaped guide rods 82 are clamped in the guide grooves 85. The clamping block 81 is controlled by the screw mechanism 9 to slide along the guide grooves 85 through the L-shaped guide rods 82 to complete the action of clamping or loosening the long straight pipe section of the pipe joint 11. The screw mechanism 9 includes a driving screw 91, two threaded rods 92 and two gears 93. The threaded rod 92 is threadedly connected to the side plate of the U-shaped mounting seat 7 and one end is fixedly connected to the clamping block 81. The two gears 93 are respectively sleeved on the two threaded rods 92. The driving screw 91 is threadedly connected to the top plate of the U-shaped mounting seat 7 and meshes with the gear teeth of the gear 93 between the two gears 93. When the driving screw 91 rotates, the threaded rod 92 is driven to rotate through the gear 93, and the threaded rod 92 drives the clamping block 81 to move along the guide groove 85.

[0022] When the present invention is used, the first clamping jaw 5, the second clamping jaw 4 and the angle adjustment mechanism 6 are first installed on the bottom plate 3; The driving screw 91 of the second clamping jaw 4 is rotated upward, driving the gear 93 to rotate in the opposite direction, and the threaded rod 92 moves outward, thereby loosening the two clamping blocks 81; Rotate the adjusting screw 53 on the first clamping jaw 5 so that the upper clamping jaw 51 and the lower clamping jaw 52 are separated from each other; Place the short straight pipe section of the pipe joint 11 between the openings of the upper clamping jaw 51 and the lower clamping jaw 52 of the first clamping jaw 5, and place the long straight pipe section of the pipe joint 11 between the openings of the two clamping blocks 81 of the first clamping jaw; Rotate the adjusting stud 53 of the first clamping jaw 5 to clamp the short straight pipe section of the pipe joint 11 with the upper clamping jaw 51 and the lower clamping jaw 52, ​​and align the center line of the short straight pipe section of the pipe joint 11 with the center line of the chuck 1; Adjust the fixed angle adjustment mechanism 6 so that the clamping block 63 is parallel to the long straight pipe section of the pipe joint 11, adjust the U-shaped mounting seat 7 so that the U-shaped mounting seat 7 is against the clamping block 63, and the opening of the clamping block 81 is also parallel to the long straight pipe section of the pipe joint 11, and fix and tighten the U-shaped mounting seat 7 and the bottom plate 3 with bolts 65; Finally, the driving screws 91 on both sides are rotated to drive the two clamping blocks 81 to clamp the long straight pipe section of the pipe joint 11, and the pipe joint 11 is firmly fixed on the base plate 3. After the base plate 3 is clamped and fixed on the chuck 1 of the lathe, the groove of the pipe joint 11 can be processed.

[0023] Of course, the above drawings and embodiments are only used to explain and illustrate the present invention, and cannot be used as improper limitations of the present invention. Any technical solutions obtained by those skilled in the art making equivalent adjustments and changes based on the present invention fall within the protection scope of the present invention.

Claims

1. A lathe fixture for a waste heat boiler pipe joint, comprising a base plate (3) that can be clamped and fixed by a chuck (1), characterized in that: The base plate (3) is a porous plate having through holes (2) arranged on its surface, and further comprises a first clamping jaw (5) positioned through the through holes (2) and mounted on the base plate (3) at one end away from the chuck (1), and a second clamping jaw (4) mounted at an oblique position of the first clamping jaw (5), wherein the first clamping jaw (5) is used to clamp a short straight pipe section of a pipe joint (11), and the second clamping jaw (4) is used to clamp a long straight pipe section of the pipe joint (11), and the pipe joint (11) can be clamped and fixed to the base plate (3) by the first clamping jaw (5) and the second clamping jaw (5).

2. A lathe fixture for a waste heat boiler pipe joint according to claim 1, characterized in that: The second clamping jaw (4) comprises a U-shaped mounting seat (7) fixedly connected to the base plate (3) at the through hole (2) by means of a connecting bolt (13), a clamping component (8) arranged in a hollow position inside the U-shaped mounting seat (7), and screw mechanisms (9) arranged at raised positions at both ends of the U-shaped mounting seat (7), wherein the clamping component (8) is driven by the screw mechanism (9) to complete the action of clamping or loosening the long straight pipe section of the pipe joint (11).

3. A lathe fixture for a waste heat boiler pipe joint according to claim 2, characterized in that: The clamping component (8) comprises two clamping blocks (81) with openings facing each other, the clamping blocks (81) being slidably connected to the U-shaped mounting seat (7) via a sliding mechanism (84), the sliding mechanism (84) comprising L-shaped guide rods (82) respectively arranged on the outer walls on both sides of the clamping block (81), and guide grooves (85) respectively arranged on the outer walls on both sides of the bottom of the U-shaped mounting seat (7) and parallel to the bottom plate (3), the L-shaped guide rods (82) having protrusions (83) embedded in the guide grooves (85), and the two clamping blocks (81) can be driven by the screw mechanism (9) to move towards or away from each other along the guide grooves (85).

4. A lathe fixture for a waste heat boiler pipe joint according to claim 3, characterized in that: The screw mechanism (9) comprises a driving screw (91) threadedly connected to the top plate of the U-shaped mounting seat (7), two threaded rods (92) one end of which is fixedly connected to the clamping block (81), and a gear (93) sleeved on the threaded rod (92), the threaded rod (92) being threadedly connected to the side plate of the U-shaped mounting seat (7), the driving screw (91) being meshed with the gear teeth of the gear (93) between the two gears (93), and when the driving screw (91) rotates, the threaded rod (92) is driven to rotate through the gear (93), and the clamping block (81) is driven to move along the guide groove (85) by the threaded rod (92).

5. A lathe fixture for waste heat boiler pipe joints according to claim 1, 2, 3 or 4, characterized in that: The first clamping jaw (5) comprises an upper clamping jaw (51) and a lower clamping jaw (52) with openings facing each other, and an adjusting stud (53) threadedly connected to the upper clamping jaw (51) and the lower clamping jaw (52); the lower clamping jaw (52) is fixed to the base plate (3); and the spacing between the openings of the upper clamping jaw (51) and the lower clamping jaw (52) is adjusted by the adjusting stud (53).

6. A lathe fixture for waste heat boiler pipe joints according to claim 5, characterized in that: The first clamping jaw (5) further comprises guide columns (54) arranged in parallel on both sides of the adjusting screw (53); the guide columns (54) are fixedly connected to the upper clamping jaw (51) and penetrate the lower clamping jaw (52) and the bottom plate (3).

7. The lathe fixture for waste heat boiler pipe joint according to claim 2, characterized in that: It also includes an angle adjustment mechanism (6) installed on the bottom plate (3) and located on the side of the U-shaped mounting seat (7), wherein the angle adjustment mechanism (6) is used to limit the rotation of the U-shaped mounting seat (7) relative to the bottom plate (3).

8. A lathe fixture for waste heat boiler pipe joints according to claim 7, characterized in that: The angle adjustment mechanism (6) comprises a clamping block (63) fixed to the base plate (3) by means of an adjustment bolt (62), a pressing plate (61) provided with an adjustment groove (64), the groove width of the adjustment groove (64) matching the outer diameter of the adjustment bolt (62), the pressing plate (61) fixedly connected to the base plate (3) by means of a bolt (65) and connected to the clamping block (63) in the adjustment groove (64) by means of the adjustment bolt (62), one end of the clamping block (63) being threadedly connected to the adjustment bolt (62) and the other end being in contact with the side wall of the U-shaped mounting seat (7), when the adjustment bolt (62) moves along the adjustment groove (64), the clamping block (63) generates a rotation with the adjustment bolt (62) as the axis, and when the clamping block (63) is fastened to the base plate (3) by means of the pressing plate (61) and the adjustment bolt (62), the rotation of the U-shaped mounting seat (7) relative to the base plate (3) is limited.

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