A steel pipe cold bending forming device

Abstract

This invention provides a steel pipe cold bending forming device, including multiple support seats, each of which has two support shafts rotatably connected via first bearings. It also includes an adjusting support assembly, a sway detection assembly, and a clamping assembly. The sway detection assembly includes a sleeve ring, an annular support body, multiple first elastic support members, and a pressure detector. After the pressure detector detects the pressure applied by the first elastic support member at the bottom of the annular support body, the operator can determine the sway of the support shaft based on the pressure value. Once sway is detected, the clamping assembly clamps and positions the sleeve ring, achieving relative stillness between the sleeve ring and the annular support body. This provides auxiliary support for the support shaft without interrupting the rolling process, facilitating stability maintenance during operation and preventing production interruptions or product quality degradation caused by support shaft sway.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of steel pipe cold bending forming, and particularly relates to a steel pipe cold bending forming device. BACKGROUND

[0002] The steel pipe cold bending forming device usually has a support shaft and a bearing, but bearing looseness can cause shaking, affecting product quality. The traditional approach may be regular maintenance or shutdown inspection, but it cannot detect and support in real time during operation. In the field of steel pipe cold bending forming, it is a common design to install a support shaft through a bearing. However, the bearing is prone to looseness after long-term use, causing the support shaft to shake and affecting the forming precision and efficiency. Existing solutions mostly rely on regular shutdown inspection, tightening or replacing the bearing. These methods are not convenient for maintaining stability during operation and can cause production interruption or product quality decline. SUMMARY

[0003] Therefore, the application aims to provide a steel pipe cold bending forming device to solve the technical problem that existing solutions mostly rely on regular shutdown inspection, tightening or replacing the bearing, which is not convenient for maintaining stability during operation and can cause production interruption or product quality decline.

[0004] To achieve the above-mentioned purpose, the technical scheme of the application is as follows:

[0005] A steel pipe cold bending forming device comprises a plurality of support seats, two support shafts are rotatably connected to each support seat through a first bearing, and the device further comprises an adjusting support assembly, a shaking detection assembly and a clamping assembly. The shaking detection assembly comprises a sleeve ring, an annular support body, a plurality of first elastic support members and a pressure detector. The sleeve ring is sleeved on the surface of the support shaft, and the sleeve ring is arranged inside the annular support body. The plurality of first elastic support members are annularly arranged on the annular support body, and the ends of the plurality of first elastic support members contact the outer ring surface of the sleeve ring.

[0006] The pressure detector is arranged at the bottom end of the annular support body, and is used to detect the pressure value applied by the first elastic support members at the bottom end of the annular support body. The adjusting support assembly is arranged on the support seat, and is used to adjust the height of the annular support body. The clamping assembly is arranged on the annular support body, and is used to clamp and position the sleeve ring.

[0007] Further, the adjusting support assembly comprises a support frame, the support frame comprises a base and two support rails, the base is fixedly connected on the surface of the support seat by screws, two support rails are fixedly connected on the top of the base, two support rails are symmetrically arranged, a connecting sliding block is slidably arranged between the rails of two support rails, a through groove is formed in the surface of two support rails, positioning studs passing through the through groove are threadedly connected on the two sides of the connecting sliding block, and a plurality of connecting plates are fixedly connected between the connecting sliding block and the annular support body.

[0008] Further, the sleeve ring comprises a first annular body, the first annular body is sleeved on the surface of the support shaft, a second annular body is rotatably connected to the surface of the first annular body by a second bearing, and the outer ring surface of the second annular body is in contact with a plurality of first elastic supports.

[0009] Further, a plurality of first elastic supports are arranged in an annular array on the annular support body, the first elastic support comprises a mounting hole, the mounting hole is formed in the outer ring surface of the annular support body and penetrates into the cavity on the inner side of the annular support body, an insert sleeve is fixedly connected in the mounting hole, a support pin is slidably connected in the insert sleeve, one end of the support pin penetrates out of the mounting hole and is in contact with the second annular body, the other end of the support pin is fixedly connected with a limiting end, a first support spring is sleeved on the surface of the support pin, and two ends of the first support spring are fixedly connected with the limiting end and the insert sleeve respectively.

[0010] Further, the pressure detector comprises a mounting seat and an elastic telescopic rod, the mounting seat is fixedly connected to the bottom end of the annular support body, a pressure sensor is fixedly connected to the mounting seat, the pressure sensor is arranged in the mounting hole at the bottom end of the annular support body, and the elastic telescopic rod is fixedly connected to the surface of the limiting end.

[0011] Further, the clamping assembly comprises a plurality of clamping jaws and an adjusting assembly, a plurality of clamping jaws are arranged in an annular array on the outer ring surface of the annular support body, the clamping jaws and the annular support body are connected by second elastic supports, the clamping jaws penetrate through the annular support body and extend into the cavity on the inner side of the annular support body, and the adjusting assembly is used for adjusting the clamping of the plurality of clamping jaws on the surface of the second annular body.

[0012] Further, the adjusting assembly comprises an adjusting threaded rod, a plurality of butt joint grooves and a plurality of plug-in cavities, the plurality of plug-in cavities are respectively arranged on the side wall of the sleeve ring away from the clamping jaw, a plug-in body is plugged into the plug-in cavity, a plug-in block is fixedly connected to the surface of the plug-in body, the plug-in block is provided with a second inclined surface, a plurality of butt joint grooves are arranged on the surface of the annular support body, the plurality of butt joint grooves are provided with a first inclined surface, and the plurality of plug-in blocks are respectively plugged into the plurality of butt joint grooves.

[0013] The adjusting threaded rod is threadedly connected to the connecting sliding block, the adjusting threaded rod is rotatably connected to a circular plate after penetrating through the connecting sliding block, the circular plate is located between the plurality of connecting plates, a plurality of connecting frames are fixedly connected to the edge of the circular plate, a moving ring is fixedly connected between the end portions of the plurality of connecting frames, a plurality of pushing rollers are rotatably connected to the surface of the moving ring, and the plurality of pushing rollers are respectively in contact with the plurality of plug-in blocks.

[0014] Further, the second elastic support comprises two plug-in seats fixedly connected to the two sides of the clamping jaw, a connecting rod is plugged into the plug-in seat, the connecting rod is fixedly connected to the surface of the annular support body, a second supporting spring is sleeved on the surface of the connecting rod, and the two ends of the second supporting spring are respectively fixedly connected to the plug-in seat and the annular support body.

[0015] Further, the end portion of the circular plate is fixedly connected with a pressing column, and the end portion of the pressing column is rotatably connected with a pressing bead.

[0016] Further, the two support shafts on the same support seat are distributed above and below, an upper rolling roller is fixedly sleeved on the surface of the upper support shaft, and a lower rolling roller is fixedly sleeved on the surface of the lower support shaft.

[0017] Compared with the prior art, the steel pipe cold bending forming device has the following advantages:

[0018] (1) After the pressure detector detects the pressure value applied by the first elastic support at the bottom end of the annular support body, the worker can judge the shaking of the support shaft according to the pressure value, and after the shaking of the support shaft is judged, the sleeve ring is clamped and positioned by the clamping assembly, the relative stillness of the sleeve ring and the annular support body is completed, and the auxiliary support of the support shaft is realized, so that the rolling work does not need to be paused, the stability during operation is maintained, and the problem of production interruption or product quality decline caused by the shaking of the support shaft is avoided.

[0019] The sleeve ring has the following functions: firstly, it senses and transmits the shaking during the pressure detection stage; and secondly, after the sleeve ring is clamped and positioned by the clamping assembly, it serves as a stress point for supporting and transmits the active stable force to the support shaft.

[0020] (2) After the pressure sensor detects the pressure value, the worker can judge the shaking condition of the support shaft according to the pressure value displayed by the pressure sensor, and after judging that the support shaft shakes, the rotating adjusting screw rod is rotated to drive the circular plate to move, the circular plate drives the moving ring to move through the connecting frame, the moving ring drives the plurality of pushing rollers to push the plurality of plug-in blocks, the plug-in blocks move in the butt joint groove, and under the action of the second inclined surface of the plug-in block and the first inclined surface in the butt joint groove, the plug-in block drives the plug-in body to move into the plug-in cavity, and at the same time, the plug-in body synchronously drives the clamping jaw to exert clamping force on the second annular body of the sleeve ring, until the clamping is completed, the relative static state of the sleeve ring and the annular support body is achieved, and the auxiliary support of the support shaft is realized, without pausing the rolling work.

[0021] (3) The base is fixedly connected to the surface of the support base through a screw, then the positioning stud is tightened to tightly abut against the support rail, the height of the annular support body and the sleeve ring is adjusted, different heights of the support shaft are adapted, and after the positioning stud is unscrewed from the threaded butt joint of the connecting sliding block, the connecting sliding block, the annular support body and the sleeve ring can be taken off from the support rail, the annular support body and the sleeve ring are installed as required, and the support shaft with a long cold rolling working time is installed.

[0022] (4) When the first bearing connected between the support shafts is loose, the support shaft will shake up and down relative to the support base, the support shaft acts on the sleeve ring, the second annular body of the sleeve ring impacts the support pin at the bottom end of the annular support body, the limiting end of the support pin at the bottom end of the annular support body extrudes the elastic expansion rod, the elastic expansion rod exerts pressure on the pressure sensor, the pressure sensor detects the pressure value, and the pressure value can be used as a basis for the worker to judge the shaking condition of the support shaft.

[0023] (5) In the process that the clamping assembly clamps and positions the sleeve ring, the top pressure column supports the end of the support shaft under the support of the circular plate, and the axial stability of the support shaft is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and serve as an explanation of the present application, and do not constitute improper limitations to the present application. In the drawings:

[0025] Figure 1 It is a first overall structure schematic view of a steel pipe cold bending forming device described in the embodiments of the present application;

[0026] Figure 2 It is a first overall structure schematic view of a steel pipe cold bending forming device described in the embodiments of the present application; Figure 1 It is an enlarged view of part A in the figure;

[0027] Figure 3 A structure schematic view of a supporting seat, a first bearing and a connecting shaft of a steel pipe cold bending forming device according to an embodiment of the present application;

[0028] Figure 4 A structure schematic view of a connecting sliding block and an annular supporting body of a steel pipe cold bending forming device according to an embodiment of the present application;

[0029] Figure 5 A structure schematic view of a connecting sliding block, an adjusting assembly and an annular supporting body of a steel pipe cold bending forming device according to an embodiment of the present application;

[0030] Figure 6 A sectional view of a connecting sliding block and an adjusting assembly of a steel pipe cold bending forming device according to an embodiment of the present application;

[0031] Figure 7 A structure schematic view of an adjusting assembly of a steel pipe cold bending forming device according to an embodiment of the present application;

[0032] Figure 8 A structure schematic view of a clamping jaw, a plug-in body and a plug-in block of a steel pipe cold bending forming device according to an embodiment of the present application;

[0033] Figure 9 A structure schematic view of an annular supporting body of a steel pipe cold bending forming device according to an embodiment of the present application;

[0034] Figure 10 A sectional view of an annular supporting body of a steel pipe cold bending forming device according to an embodiment of the present application;

[0035] Figure 11 A structure schematic view of a sleeve ring of a steel pipe cold bending forming device according to an embodiment of the present application.

[0036] Explanation of reference signs:

[0037] 1-support seat; 2-first bearing; 3-support shaft; 4-sleeve ring; 401-first annular body; 402-second bearing; 403-second annular body; 5-annular support body; 501-chamber; 502-butting groove; 50201-first inclined surface; 6-upper roller; 7-lower support roller; 8-support frame; 801-base; 802-support rail; 9-connecting sliding block; 10-through slot; 11-positioning stud; 12-connecting plate; 13-mounting hole; 14-insert sleeve; 15-support pin; 16-limiting end; 17-first support spring; 18-mounting seat; 19-pressure sensor; 20-clamping jaw; 21-insert body; 22-insert cavity; 23-insert block; 2301-second inclined surface; 24-adjusting threaded rod; 25-circular plate; 26-connecting frame; 27-moving ring; 28-pushing roller; 29-insert seat; 30-connecting rod; 31-second support spring; 32-pressing column; 33-pressing bead; 34-elastic telescopic rod. DETAILED DESCRIPTION

[0038] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0040] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0042] As shown in 1 to Figure 11 As shown in 1 to

[0043] The two support shafts 3 on the same support seat 1 are distributed above and below, the upper support shaft 3 is fixedly sleeved with an upper roller 6 on the surface, and the lower support shaft 3 is fixedly sleeved with a lower support roller 7 on the surface. Through the cooperation of the upper roller 6 and the lower support roller 7, the steel strip between the upper roller 6 and the lower support roller 7 is rolled.

[0044] The adjusting support assembly includes a support frame 8, the support frame 8 includes a base 801 and two support rails 802, the base 801 is fixedly connected on the surface of the support seat 1 by screws, the two support rails 802 are fixedly connected on the top of the base 801, the two support rails 802 are symmetrically arranged, a connecting sliding block 9 is slidingly arranged between the rails of the two support rails 802, a through slot 10 is formed on the surface of the two support rails 802, a positioning stud 11 passing through the through slot 10 is threadedly connected on both sides of the connecting sliding block 9, and a plurality of connecting plates 12 are fixedly connected between the connecting sliding block 9 and the annular support body 5. The two support shafts 3 on the support seat 1 are distributed above and below, the spacing of the two support shafts 3 on different support seats 1 is different, therefore, when the sleeve ring 4 is installed, the sleeve ring 4 is clamped and positioned by the clamping assembly, then the sleeve ring 4 is sleeved with the support shaft 3, the connecting sliding block 9 can slide on the support rail 802 until the sleeve ring 4 in the annular support body 5 is sleeved on the support shaft 3, then the base 801 is fixedly connected on the surface of the support seat 1 by screws, then the positioning stud 11 is tightened to tightly contact the support rail 802, the height of the annular support body 5 and the sleeve ring 4 is adjusted to adapt to the support shaft 3 of different heights, and by unscrewing the positioning stud 11 from the connecting sliding block 9, the connecting sliding block 9, the annular support body 5 and the sleeve ring 4 can be taken off from the support rail 802, the annular support body 5 and the sleeve ring 4 are installed as needed, and the support shaft 3 with long cold rolling working time is installed.

[0045] The sleeve ring 4 comprises a first annular body 401 sleeved on the surface of the support shaft 3, a second annular body 403 rotatably connected to the surface of the first annular body 401 through a second bearing 402, and the outer ring surface of the second annular body 403 is in contact with a plurality of first elastic supports. The first annular body 401 is sleeved on the surface of the support shaft 3, the second annular body 403 is in contact with the first elastic supports, so that the sleeve ring 4 can be supported by the first elastic supports while maintaining the movable connection between the second annular body 403 and the first annular body 401, thereby reducing the obstruction to the rotation of the support shaft 3.

[0046] The plurality of first elastic supports are arranged in an annular array on the annular support body 5. The first elastic supports comprise mounting holes 13 formed on the outer ring surface of the annular support body 5 and extending into the cavity 501 on the inner side of the annular support body 5. The mounting holes 13 are fixedly connected with plug sleeves 14, the plug sleeves 14 are slidably connected with support pins 15, one end of the support pins 15 is in contact with the second annular body 403 after passing through the mounting holes 13, the other end of the support pins 15 is fixedly connected with limiting ends 16, the surface of the support pins 15 is sleeved with first support springs 17, and the two ends of the first support springs 17 are fixedly connected with the limiting ends 16 and the plug sleeves 14, respectively. It should be understood that, after the clamping assembly is removed from clamping and positioning the sleeve ring 4, the end of the support pin 15 is supported by the first support spring 17, and the plurality of support pins 15 support the second annular body 403 in the cavity 501 of the annular support body 5, thereby giving the sleeve ring 4 a movable freedom in the cavity 501 of the annular support body 5.

[0047] The pressure detector comprises a mounting seat 18 and an elastic telescopic rod 34. The mounting seat 18 is fixedly connected to the bottom end of the annular support body 5, and a pressure sensor 19 is fixedly connected to the mounting seat 18. The pressure sensor 19 is located in the mounting hole 13 at the bottom end of the annular support body 5. The elastic telescopic rod 34 is fixedly connected to the surface of the limiting end 16. The detection end of the pressure sensor 19 is in contact with the end of the elastic telescopic rod 34. When the first bearing 2 connected between the support shaft 3 and the support shaft 3 loosens, the support shaft 3 will shake up and down relative to the support seat 1, and the support shaft 3 will act on the sleeve ring 4. The second annular body 403 of the sleeve ring 4 will impact the support pin 15 at the bottom end of the annular support body 5. The limiting end 16 of the support pin 15 at the bottom end of the annular support body 5 will extrude the elastic telescopic rod 34. The elastic telescopic rod 34 will press the pressure sensor 19. The pressure sensor 19 will detect the pressure value. The pressure value can be used as a basis for the worker to judge the shaking of the support shaft 3 and provide a basis for the worker to judge.

[0048] The clamping assembly comprises a plurality of clamping jaws 20 and an adjusting assembly, the plurality of clamping jaws 20 are annularly distributed on the outer ring surface of the annular support body 5, and the clamping jaws 20 are connected with the annular support body 5 through the second elastic support, the clamping jaws 20 penetrate through the annular support body 5 and extend into the cavity 501 on the inner side of the annular support body 5, and the adjusting assembly is used for adjusting the plurality of clamping jaws 20 to clamp the surface of the second annular body 403.

[0049] The adjusting assembly comprises an adjusting threaded rod 24, a plurality of butt joint grooves 502 and a plurality of plug-in cavities 22, the plurality of plug-in cavities 22 are respectively arranged on the end side wall of the plurality of clamping jaws 20 away from the sleeve ring 4, the plug-in cavities 22 are plugged with plug-in bodies 21, the plug-in bodies 21 are fixedly connected with plug-in blocks 23 on the surface, the plug-in blocks 23 have second inclined surfaces 2301, the plurality of butt joint grooves 502 are arranged on the surface of the annular support body 5, the plurality of butt joint grooves 502 have first inclined surfaces 50201, the plurality of plug-in blocks 23 are respectively plugged in the plurality of butt joint grooves 502, and the second inclined surfaces 2301 of the plug-in blocks 23 are in contact with the first inclined surfaces 50201 of the butt joint grooves 502.

[0050] The adjusting threaded rod 24 is threadedly connected to the connecting sliding block 9, the adjusting threaded rod 24 is rotatably connected with a circular plate 25 after penetrating through the connecting sliding block 9, the circular plate 25 is located between the plurality of connecting plates 12, the circular plate 25 is fixedly connected with a plurality of connecting frames 26 at the edge, the plurality of connecting frames 26 are fixedly connected between the end portions, a moving ring 27 is fixedly connected between the end portions, the moving ring 27 is rotatably connected with a plurality of pushing rollers 28 on the surface, and the plurality of pushing rollers 28 are respectively in contact with the plurality of plug-in blocks 23.

[0051] Before the sleeve ring 4 is installed on the support shaft 3, the sleeve ring 4 is clamped and positioned at the inner side of the annular support body 5 by the clamping assembly, then the sleeve ring 4 is sleeved on the surface of the support shaft 3, the support frame 8 is fixedly connected on the surface of the support base 1, after the support frame 8 is installed on the surface of the support base 1, the clamping of the sleeve ring 4 by the clamping assembly is cancelled, and the freedom of movement between the sleeve ring 4 and the annular support body 5 is provided.

[0052] After the pressure sensor 19 detects the pressure value, the staff can judge the shaking condition of the support shaft 3 according to the pressure value displayed by the pressure sensor 19, and after it is judged that the support shaft 3 shakes, the rotating adjusting screw rod 24 is rotated, the adjusting screw rod 24 pushes the circular plate 25 to move, the circular plate 25 pushes the moving ring 27 through the connecting frame 26, the moving ring 27 drives the plurality of pushing rollers 28 to push the plurality of plug-in blocks 23, the plug-in blocks 23 move in the butt joint groove 502, and under the action of the second inclined surface 2301 of the plug-in block 23 and the first inclined surface 50201 in the butt joint groove 502, the plug-in block 23 drives the plug-in body 21, the plug-in body 21 is moved into the plug-in cavity 22 at the same time, and the clamp jaw 20 synchronously applies clamping force to the second annular body 403 of the sleeving ring 4, until clamping is completed, the relative static state of the sleeving ring 4 and the annular support body 5 is achieved, and the auxiliary support of the support shaft 3 is achieved without stopping the rolling work.

[0053] When it is needed to cancel the clamping, the rotating adjusting screw rod 24 is rotated to drive the circular plate 25 to move, the circular plate 25 drives the moving ring 27 to move through the connecting frame 26, the moving ring 27 drives the pushing roller 28 to move away from the plug-in block 23, and the clamp jaw 20 is reset under the action of the second elastic support to cancel the clamping of the sleeving ring 4.

[0054] As shown in Figure 4 , Figure 5 and Figure 8 , as an embodiment, the second elastic support includes two plug-in seats 29, the two plug-in seats 29 are fixedly connected on the two sides of the clamp jaw 20, the plug-in seat 29 is plugged with a connecting rod 30, the connecting rod 30 is fixedly connected on the surface of the annular support body 5, the surface of the connecting rod 30 is sleeved with a second support spring 31, and the two ends of the second support spring 31 are fixedly connected with the plug-in seat 29 and the annular support body 5 respectively. When the clamp jaw 20 is pressed, the clamp jaw 20 drives the plug-in seat 29 to compress the second support spring 31, and when the clamp jaw 20 loses the pressing, the second support spring 31 drives the plug-in seat 29 to reset the clamp jaw 20 to cancel the clamping.

[0055] As shown in Figure 6 and Figure 7 , as an embodiment, the end of the circular plate 25 is fixedly connected with a top pressing column 32, and the end of the top pressing column 32 is rotatably connected with a top bead 33. It should be understood that in the process that the clamping assembly clamps and positions the sleeving ring 4, the top pressing column 32 supports the end of the support shaft 3 under the support of the circular plate 25, which is beneficial to guarantee the stability of the support shaft 3 in the axial direction.

[0056] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A steel pipe cold bending forming device, comprising a plurality of support seats (1), two support shafts (3) are rotatably connected to each support seat (1) through a first bearing (2), characterized in that: Also include adjusting support assembly, shaking detection assembly and clamping assembly, the shaking detection assembly includes a sleeve ring (4), ring support body (5), a plurality of first elastic support and pressure detector, the sleeve ring (4) is set on the surface of the support shaft (3), and the sleeve ring (4) is arranged in the ring support body (5), a plurality of the first elastic support is arranged on the ring support body (5), and the end of the plurality of first elastic support is contacted on the outer ring surface of the sleeve ring (4); The pressure detector is arranged at the bottom end of the ring support body (5), and the pressure detector is used for detecting the pressure value applied by the first elastic support at the bottom end of the ring support body (5), the adjusting support assembly is arranged on the support base (1), and the adjusting support assembly is used for adjusting the height of the ring support body (5), the clamping assembly is arranged on the ring support body (5), and the clamping assembly is used for clamping positioning the sleeve ring (4); The sleeve ring (4) includes a first annular body (401), the first annular body (401) is set on the surface of the support shaft (3), the surface of the first annular body (401) is rotatably connected with a second annular body (403) through a second bearing (402), and the outer ring surface of the second annular body (403) is contacted with a plurality of first elastic supports; The clamping assembly includes a plurality of clamping jaws (20) and an adjusting assembly, a plurality of the clamping jaws (20) are annularly distributed on the outer ring surface of the ring support body (5), and the clamping jaw (20) is connected between the clamping jaw (20) and the ring support body (5) through a second elastic support, the clamping jaw (20) penetrates the ring support body (5) and extends into the cavity (501) on the inner side of the ring support body (5), and the adjusting assembly is used for adjusting the plurality of clamping jaws (20) to clamp the surface of the second annular body (403).

2. The apparatus for cold bending a steel pipe according to claim 1, wherein: The adjusting support assembly includes a support frame (8), the support frame (8) includes a base (801) and two support rails (802), the base (801) is fixedly connected on the surface of the support base (1) through screws, two support rails (802) are fixedly connected on the top of the base (801), two support rails (802) are symmetrically arranged, a connecting sliding block (9) is slidably arranged between the rail interiors of two support rails (802), a through slot (10) is formed on the surface of two support rails (802), and a positioning stud (11) penetrating through the through slot (10) is threadedly connected on both sides of the connecting sliding block (9).

3. A steel pipe cold bending forming device according to claim 2, characterized in that: A plurality of the first elastic support annular arrays are distributed on the annular support body (5), the first elastic support includes a mounting hole (13) which is opened on the outer ring surface of the annular support body (5) and penetrates into the cavity (501) on the inner side of the annular support body (5), the mounting hole (13) is fixedly connected with an insert sleeve (14) inside, the insert sleeve (14) is slidingly connected with a support pin (15) inside, one end of the support pin (15) penetrates out of the mounting hole (13) and is in contact with the second annular body (403), the other end of the support pin (15) is fixedly connected with a limiting end (16), the surface of the support pin (15) is sleeved with a first support spring (17), and the two ends of the first support spring (17) are fixedly connected with the limiting end (16) and the insert sleeve (14) respectively.

4. The apparatus for cold bending a steel pipe according to claim 3, wherein: The pressure detector includes a mounting seat (18) and an elastic telescopic rod (34), the mounting seat (18) is fixedly connected at the bottom end of the annular support body (5), the pressure sensor (19) is fixedly connected on the mounting seat (18), the pressure sensor (19) is in the mounting hole (13) at the bottom end of the annular support body (5), and the elastic telescopic rod (34) is fixedly connected on the surface of the limiting end (16). The detection end of the pressure sensor (19) is in contact with the end of the elastic telescopic rod (34).

5. The apparatus for cold bending a steel pipe according to claim 2, wherein: The adjusting assembly includes an adjusting threaded rod (24), a plurality of butt joints (502) and a plurality of plug-in cavities (22), the plurality of plug-in cavities (22) are respectively arranged on the sidewall of one end of the plurality of clamping jaws (20) away from the sleeve ring (4), the plug-in cavities (22) are plugged with plug-in bodies (21), the plug-in bodies (21) are fixedly connected with plug-in blocks (23) on the surfaces, the plug-in blocks (23) have second inclined surfaces (2301), the plurality of butt joints (502) are arranged on the surface of the annular support body (5), the plurality of butt joints (502) have first inclined surfaces (50201) inside, the plurality of plug-in blocks (23) are respectively plugged in the plurality of butt joints (502), and the second inclined surfaces (2301) of the plug-in blocks (23) are in contact with the first inclined surfaces (50201) of the butt joints (502). The adjusting threaded rod (24) is threadedly connected on the connecting sliding block (9), the adjusting threaded rod (24) is rotatably connected with a circular plate (25) after penetrating through the connecting sliding block (9), the circular plate (25) is located between the plurality of connecting plates (12), a plurality of connecting frames (26) are fixedly connected at the edges of the circular plate (25), a moving ring (27) is fixedly connected between the end portions of the plurality of connecting frames (26), a plurality of pushing rollers (28) are rotatably connected on the surface of the moving ring (27), and the plurality of pushing rollers (28) are respectively in contact with the plurality of plug-in blocks (23).

6. The apparatus for cold bending a steel pipe according to claim 2, wherein: The second elastic support comprises two plug-in sockets (29) fixedly connected on two sides of the clamping jaw (20), a connecting rod (30) is plugged on the plug-in socket (29), the connecting rod (30) is fixedly connected on the surface of the annular support body (5), a second support spring (31) is sleeved on the surface of the connecting rod (30), and two ends of the second support spring (31) are fixedly connected with the plug-in socket (29) and the annular support body (5) respectively.

7. The apparatus for cold bending a steel pipe according to claim 5, wherein: The end of the circular plate (25) is fixedly connected with a top pressing column (32), and the end of the top pressing column (32) is rotatably connected with a top bead (33).

8. The apparatus for cold bending a steel pipe according to claim 1, wherein: The two support shafts (3) on the same support seat (1) are distributed upwards and downwards, the surface of the upper support shaft (3) is fixedly sleeved with an upper roller (6), and the surface of the lower support shaft (3) is fixedly sleeved with a lower support roller (7).

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