Flexible clamping device for brazing of tubes

Abstract

The utility model relates to a kind of flexible clamping device for pipe fitting brazing, it includes: locking mechanism and clamping mechanism, locking mechanism includes chassis, universal ball and universal ball limit cover, chassis is fixedly arranged, the universal ball of top setting can be rotated with universal ball ball center as center;Universal ball limit cover is slotted, and the support bar of universal ball connection setting is extended by slot, and is connected clamping mechanism, clamping mechanism is connected on universal ball by support beam;Support bar can realize free swing in the slot range of universal ball limit cover, universal ball limit cover can realize horizontal direction 360 ° rotation relative to chassis, support beam can be along the axis of support beam to for universal ball 360 ° rotation is realized.According to the flexible clamping device for pipe fitting brazing of the utility model, when being used for clamping pipe fitting brazing, the clamped pipe fitting can be switched position and direction change on the spherical surface with universal ball ball center as ball center, ball center to the clamped position of pipe fitting is radius.

Description

Technical Field

[0001] This utility model relates to the field of clamping equipment technology, and more specifically, to a flexible clamping device for brazing pipe fittings. Background Technology

[0002] Various complex-shaped bent pipe components are widely used in vehicles, ships, locomotives, aerospace, and everyday furniture. Most of these pipe components require brazing connections with relevant joints, and their bending shape and precision must undergo rigorous testing. In traditional production processes, the brazing connection of pipes to joints, as well as the measurement of pipe components, all require a reliable and efficient pipe clamping device for clamping and fixing to ensure the smooth progress of the brazing and measurement processes.

[0003] Taking the manufacturing of diesel engine pipe fittings as an example, the brazing of various research and mass-produced pipe fittings mainly adopts manual support and special brazing fixtures for clamping, fixing, and positioning during brazing. The measurement of pipe fittings uses mechanical clamps such as clamps, V-blocks and pads / pressure plates, and special testing fixtures for clamping and fixing. The main shortcomings are: the pipe fittings are prone to shaking when manually supported, resulting in inaccurate positioning and potential quality problems for the brazing quality; the special brazing fixtures and special testing fixtures have low versatility and cannot be used for brazing and testing of multiple specifications and models of pipe fittings. At the same time, the large number of special brazing fixtures leads to low production cost-effectiveness, and the fixture inventory and on-site management are prone to chaos, resulting in serious resource waste.

[0004] In actual production and application, with the variations in the types, quantities, shapes, and specifications of pipe components, existing clamping and fixing methods can no longer meet the high-quality requirements of speed, adaptability, and efficiency. Therefore, there is an urgent need to develop a flexible pipe clamping device to overcome the shortcomings of the above technologies and provide a more advanced and applicable solution for this technical field and direction. Summary of the Invention

[0005] The technical problem this utility model aims to solve is that pipe fittings are prone to shaking and inaccurate positioning when manually supported, which poses potential quality risks to the brazing quality of the pipe fittings. The special brazing fixtures and special testing fixtures have low versatility and cannot be applied to the brazing and testing of pipe fittings of various specifications and models. At the same time, the number of special brazing fixtures is large, resulting in low production cost-effectiveness, and the fixture inventory and on-site management are prone to chaos, leading to serious waste of resources.

[0006] To solve the above-mentioned technical problems, this utility model provides a flexible clamping device for brazing pipe fittings, comprising: a locking mechanism, which includes a chassis, a universal ball, and a universal ball limiting cover; the chassis is fixedly installed, and the universal ball installed at the top can rotate around its center; and a clamping mechanism, wherein the universal ball limiting cover has a slot, a support rod connected to the universal ball extends out of the slot and connects to the clamping mechanism, and the clamping mechanism is connected to the universal ball via a support beam, wherein the support rod is within the slot of the universal ball limiting cover. It can swing freely, and the universal ball limit cover can rotate 360° horizontally relative to the chassis. The support beam can rotate 360° relative to the universal ball along the axis of the support beam. When the clamping mechanism is used to clamp the brazing of the pipe fitting, it can switch the position of the clamped pipe fitting on the spherical surface with the center of the universal ball as the center and the position of the clamped pipe fitting as the radius. Since the support beam itself can rotate axially, it can achieve 360° direction switching when the clamped pipe fitting is located at a predetermined point on the spherical surface.

[0007] According to an embodiment of this utility model, the slot on the universal ball limiting cover can be a 90° downward slot starting from the vertical direction of the universal ball's center. Then, the support beam drives the universal ball of the clamped pipe to switch positions on the upper hemisphere surface with the center of the ball as the center and the position of the clamped pipe as the radius.

[0008] According to an embodiment of this utility model, the locking mechanism may further include: a support column, which is a hollow cylindrical structure and is vertically fixed to the chassis by multiple screws; a fixing plate, in which a stepped hole is provided on the inner side of the top of the support column, and a fixing plate with a thickness smaller than the depth of the stepped hole is fitted inside the stepped hole; a stud, in which a through-hole is provided in the center of the fixing plate, and a stud is vertically inserted into the center hole and fixed by two nuts tightened from the top and bottom sides of the fixing plate respectively; a blind hole is provided in the center of the chassis facing upwards, through which the stud passes through the downward-facing hole of the fixing plate. The length is determined by the contact between the unthreaded end of the stud and the bottom of the blind hole in the center of the chassis; a tightening plate and a locking handle are included. The tightening plate has a threaded hole in its center, through which the nut on the upper side of the stud is screwed. A locking handle connected by threads is located on the side of the tightening plate; a movable top block has a blind hole at the center of its lower end face for fitting the top of the stud, and a concave spherical surface on its upper end face with a diameter matching the outer diameter of the universal ball joint for placing or lifting the universal ball joint; a support shell has a circumferentially outward convex shape at the bottom of the universal ball joint limit cover. The supporting shell is a hollow cylinder, with a supporting column fixedly connected to its lower end, and a fixing plate is pressed and fixed. The fixing plate is secured to the supporting shell and the supporting column by multiple evenly distributed screws. The upper end of the supporting shell has an inwardly extending part that mates with a protrusion at the bottom of the universal ball limiter cover to fit the cover. The side wall of the supporting shell has a 45° axial opening as a handle passage groove for extending a locking handle. When the universal ball is adjusted to the desired position, the locking handle is moved to... When the support shell is open on one side, the tightening plate will move axially upward along the stud, and the movable top block, universal ball, and universal ball limit cover will be driven to move in the same direction and press together. When the protrusion at the bottom of the universal ball limit cover is pressed against the inner part of the support shell, the universal ball is locked and fixed. Conversely, when the locking handle is moved to the other side of the support shell opening, the tightening plate will move axially downward along the stud, and the movable top block, universal ball, and universal ball limit cover will be driven to move in the same direction, thus allowing the universal ball to loosen and move freely.

[0009] According to an embodiment of this utility model, the clamping mechanism may further include: a support arm plate, which is L-shaped, with a support beam fixedly connected to the top of the corner of the support arm plate; a movable arm plate, which is V-shaped, with one end of the movable arm rotatably connected to the middle part of the long side of the support arm plate via a rotating shaft; a first follower shaft, which has a through hole in the middle and is located at the top of the corner of the movable arm plate, and can rotate an angle along the plane of the support arm plate and the movable arm plate; and a second follower shaft, which has a threaded hole in the middle and is located at the top of the long side of the support arm plate. The end of the side can rotate by an angle along the plane direction where the support arm plate and the movable arm plate are located; the long screw passes through the threaded hole of the second follower shaft, and the rear end passes through the through hole of the first follower shaft, and is relatively fixed in the first follower shaft in the axial direction of the long screw. When the long screw rotates, it changes its relative position with the second follower shaft, which drives the first follower shaft to change its relative position with the second follower shaft, thereby changing the relative position of the other end of the short side of the support arm plate and the other end of the movable arm plate, thereby realizing the clamping mechanism to clamp or release the pipe.

[0010] According to an embodiment of the present invention, the clamping mechanism may further include: a first fixing pin, wherein the support beam and the two support arm plates are respectively riveted and fixed by the two first fixing pins, and the two support arm plates are riveted and fixed at the other end by the third fixing pin to form a support arm.

[0011] According to an embodiment of the present invention, the clamping mechanism may further include: a movable clamping block and a fixed shaft. The movable clamping block is riveted to the other end of the movable arm plate through the fixed shaft. The movable clamping block is rotatable relative to the fixed shaft. The pipe fitting is positioned and clamped under the combined force of the V-shaped angle set at the top of the support beam and the movable clamping block.

[0012] According to an embodiment of the present invention, the fastening mechanism may further include: a second fixing pin, wherein the middle part of the movable arm plate is riveted and fixed by the second fixing pin to form a movable arm.

[0013] According to an embodiment of the present invention, the clamping mechanism may further include: a clamping handle disposed at the end of the long screw, used to reduce the force of rotating the long screw through leverage, wherein rotating the long screw clockwise by the clamping handle can realize the clamping function between the movable arm and the support arm, and rotating the long screw counterclockwise can realize the loosening function between the movable arm and the support arm.

[0014] According to an embodiment of this utility model, the clamping mechanism may further include: two retaining rings, fixedly disposed on both sides of the long screw located on the first follower shaft, for axial limiting of the long screw. During clockwise rotation of the long screw, the distance between the first and second follower shafts increases. With the rotation shaft as the fulcrum, the long screw pushes the first follower shaft through the retaining rings, thereby pushing the movable arm to achieve the clamping function. Conversely, during counterclockwise rotation of the long screw, the distance between the first and second follower shafts decreases. With the rotation shaft as the fulcrum, the long screw pulls the first follower shaft through the retaining rings, thereby pulling the movable arm to achieve the releasing function.

[0015] According to an embodiment of the present invention, the flexible clamping device for brazing pipe fittings may further include: a fixing nut and a double-ended stud, the double-ended stud being threaded onto the universal ball joint, and the double-ended stud being connected to the support beam via the fixing nut.

[0016] Compared with the prior art, the technical solution provided by the embodiments of this utility model can achieve at least the following beneficial effects:

[0017] This utility model discloses a flexible clamping device for brazing pipe fittings. It is highly adaptable, quick, and stable in clamping. Operators only need to clamp the pipe fitting to be welded according to the construction requirements using the clamping mechanism, then adjust its position to the welding location, and finally lock it in place using the locking mechanism. It can basically accommodate pipe fittings with diameters ranging from 6mm to 55mm and weights up to 5kg, in various angles and positions. The operation is flexible and convenient, with extremely high clamping efficiency and strong versatility. It has been applied to the brazing and measurement processes of diesel engine pipe fittings in manufacturing, with excellent results and significant economic and social benefits. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0019] Figure 1a and Figure 1b This is a schematic diagram of a flexible clamping device for brazing pipe fittings according to an embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional view of Figure 1;

[0021] Figure 3 This is a schematic diagram of the support shell according to an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram showing a universal ball limiting cover according to an embodiment of the present utility model;

[0023] Figure 5 This is a diagram showing the usage state of a flexible clamping device for brazing pipe fittings according to an embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0026] Figure 1a and Figure 1b This is a schematic diagram of a flexible clamping device for brazing pipe fittings according to an embodiment of the present invention.

[0027] like Figure 1a and Figure 1b As shown, the flexible clamping device for brazing pipe fittings includes a locking mechanism and a clamping mechanism.

[0028] The locking mechanism includes a chassis 2, a swivel ball 12, and a swivel ball limit cover 11. The chassis 2 is fixedly installed, and the swivel ball 12 installed on the top can rotate around the center of the swivel ball 12.

[0029] The universal ball limit cover 11 has a slot, and the support rod connected to the universal ball 12 extends out of the slot and is connected to the clamping mechanism. The clamping mechanism is connected to the universal ball 12 through the support beam 26.

[0030] Among them, the support rod can swing freely within the slot of the universal ball limit cover 11, the universal ball limit cover 11 can rotate 360° horizontally relative to the chassis 2, and the support beam 26 can rotate 360° relative to the universal ball 12 along the axis of the support beam 26.

[0031] When the clamping mechanism is used to clamp the brazing of the pipe fitting, it can switch the position of the clamped pipe fitting along the spherical surface with the center of the universal ball 12 as the center and the distance from the center of the ball to the clamped position of the pipe fitting as the radius. Since the support beam 26 itself can rotate along the axial direction, it can achieve 360° direction switching when the clamped pipe fitting is located at a predetermined point on the spherical surface.

[0032] According to one or more embodiments of the present invention, the slot on the universal ball limiting cover 11 is a downward slot at 90° from the vertical direction of the center of the universal ball 12. Then, the support beam 26 drives the universal ball 12 of the clamped pipe to switch positions on the upper hemisphere with the center of the ball as the center and the position of the clamped pipe as the radius.

[0033] Figure 2 This is a cross-sectional view of Figure 1; Figure 3 This is a schematic diagram of the support shell according to an embodiment of the present utility model; Figure 4 This is a schematic diagram showing a universal ball limiting cover according to an embodiment of the present utility model.

[0034] like Figures 2 to 4 As shown, the locking mechanism also includes: a support column 3, a fixing plate 6, a stud 4, a tightening plate 8, a locking handle 7, a movable top block 10, and a support shell 9.

[0035] The support column 3 is a hollow cylindrical structure and is vertically fixed to the chassis 2 by multiple screws 1; the inner side of the top of the support column 3 is provided with a stepped hole, and a fixing plate 6 with a thickness smaller than the depth of the stepped hole is installed in the stepped hole.

[0036] The center of the fixing plate 6 is provided with a through hole. A stud 4 is vertically inserted into the center hole and fixed by two nuts 5 from the top and bottom sides of the fixing plate 6 respectively. The center of the chassis 2 is provided with a blind hole facing upward. The length of the stud 4 passing through the fixing plate 6 downward is such that the unthreaded end of the stud 4 contacts the bottom end of the blind hole in the center of the chassis 2.

[0037] The tightening plate 8 has a threaded hole in its center. The nut 5 on the upper side of the stud 4 is screwed into the tightening plate 8 through the threaded hole. The tightening plate 8 has a locking handle 7 on its side that is fixedly connected by a thread.

[0038] The lower end face of the movable top block 10 has a blind hole at its center for fitting the top of the stud 4, and the upper end face has a concave spherical surface with a diameter that matches the outer diameter of the universal ball 12, for placing or lifting the universal ball 12.

[0039] The bottom of the universal ball limit cover 11 has a circumferentially outward protrusion. The main body of the support shell 9 is a hollow cylinder. The lower end is fixedly connected to the support column 3 and presses and fixes the fixing plate 6. The fixing plate 6 is fixed to the support shell 9 and the support column 3 by multiple evenly distributed screws 1. The upper end of the support shell 9 has an inwardly extending part that is used to cooperate with the protrusion at the bottom of the universal ball limit cover 11 to fit the universal ball limit cover 11. The side wall of the support shell 9 has an axial 45° opening as a handle through groove for extending and locking the handle 7.

[0040] When the omnidirectional ball 12 is adjusted to the required position, and the locking handle 7 is moved to the side of the opening of the support shell 9, the tightening plate 8 will move axially upward along the stud 4. The movable top block 10, the omnidirectional ball 12, and the omnidirectional ball limiting cover 11 will be driven to move in the same direction and press together. When the protruding part at the bottom of the omnidirectional ball limiting cover 11 is pressed together with the inner part of the support shell 9, the omnidirectional ball 12 is locked and fixed. Conversely, when the locking handle 7 is moved to the other side of the opening of the support shell 9, the tightening plate 8 will move axially downward along the stud 4. The movable top block 10, the omnidirectional ball 12, and the omnidirectional ball limiting cover 11 will be driven to move in the same direction, thus allowing the omnidirectional ball 12 to loosen and move freely.

[0041] According to one or more embodiments of the present invention, the clamping mechanism further includes: a support arm plate 25, a movable arm plate 16, a first follower shaft 19, a second follower shaft 21, and a long screw 20.

[0042] The support arm plate 25 is L-shaped, and the top of the corner of the support arm plate 25 is fixedly connected to the support beam 26; the movable arm plate 16 is V-shaped, and one end of the movable arm is rotatably connected to the middle part of the long side of the support arm plate 25 through the rotating shaft 24.

[0043] The first follower shaft 19 has a through hole in the middle and is located at the corner top of the movable arm plate 16, and can rotate by an angle along the plane direction where the support arm plate 25 and the movable arm plate 16 are located; the second follower shaft 21 has a threaded hole in the middle and is located at the end of the long side of the support arm plate 25, and can rotate by an angle along the plane direction where the support arm plate 25 and the movable arm plate 16 are located.

[0044] The long screw 20 passes through the threaded hole of the second follower shaft 21, and its rear end passes through the through hole of the first follower shaft 19, and is fixedly disposed in the first follower shaft 19 in the axial direction of the long screw 20.

[0045] When the long screw 20 rotates, it changes its relative position with the second follower shaft 21, which in turn drives the first follower shaft 19 to change its relative position with the second follower shaft 21. This supports the relative position of the other end of the short side of the support arm plate 25 and the other end of the movable arm plate 16, thereby enabling the clamping mechanism to clamp or release the pipe fitting.

[0046] According to one or more embodiments of the present invention, the clamping mechanism further includes: a first fixing pin 13, the support beam 26 and the two support arm plates 25 are respectively riveted and fixed by the two first fixing pins 13, and the two support arm plates 25 are riveted and fixed at the other end by the third fixing pin 23 to form a support arm.

[0047] According to one or more embodiments of this utility model, the clamping mechanism further includes: a movable clamping block 14 and a fixed shaft 15. The movable clamping block 14 is riveted to the other end of the movable arm plate 16 via the fixed shaft 15, and the movable clamping block 14 is rotatable relative to the fixed shaft 15. The pipe fitting is positioned and clamped under the combined force of the V-shaped angle provided at the top of the support beam 26 and the movable clamping block 14.

[0048] According to one or more embodiments of the present invention, the fastening mechanism further includes: a second fixing pin 17, wherein the middle part of the movable arm plate 16 is riveted and fixed by the second fixing pin 17 to form a movable arm.

[0049] According to one or more embodiments of this utility model, the clamping mechanism further includes a clamping handle 22, disposed at the end of the long screw 20, for reducing the force required to rotate the long screw 20 through leverage. Specifically, rotating the long screw 20 clockwise via the clamping handle 22 achieves a clamping function between the movable arm and the support arm, while rotating the long screw 20 counterclockwise achieves a releasing function between the movable arm and the support arm.

[0050] According to one or more embodiments of this utility model, the clamping mechanism further includes two retaining rings 18, which are fixedly disposed on both sides of the long screw 20 located on the first follower shaft 19, for axial limiting of the long screw 20. During clockwise rotation of the long screw 20, the distance between the first follower shaft 19 and the second follower shaft 21 increases. With the rotation shaft 24 as the fulcrum, the long screw 20 pushes the first follower shaft 19 through the retaining rings 18, thereby pushing the movable arm to achieve the clamping function. Conversely, during counterclockwise rotation of the long screw 20, the distance between the first follower shaft 19 and the second follower shaft 21 decreases. With the rotation shaft 24 as the fulcrum, the long screw 20 pulls the first follower shaft 19 through the retaining rings 18, thereby pulling the movable arm to achieve the releasing function.

[0051] According to one or more embodiments of the present invention, the flexible clamping device for brazing pipe fittings further includes: a fixing nut 275 and a double-ended stud 284, the double-ended stud 284 being threaded onto the universal ball 12, and the bidirectional stud 4 being connected to the support beam 26 via the fixing nut 275.

[0052] This utility model discloses a flexible clamping device for brazing pipe fittings. It is highly adaptable, quick, and stable in clamping. Operators only need to clamp the pipe fitting to be welded according to the construction requirements using the clamping mechanism, then adjust its position to the welding location, and finally lock it in place using the locking mechanism. It can basically accommodate pipe fittings with diameters ranging from 6mm to 55mm and weights up to 5kg, in various angles and positions. The operation is flexible and convenient, with extremely high clamping efficiency and strong versatility. It has been applied to the brazing and measurement processes of diesel engine pipe fittings in manufacturing, with excellent results and significant economic and social benefits.

[0053] Figure 5 This is a diagram showing the usage state of a flexible clamping device for brazing pipe fittings according to an embodiment of the present invention.

[0054] like Figure 5 As shown, the flexible clamping device for brazing pipe fittings according to this utility model consists of two parts: a locking mechanism and a clamping mechanism. The locking mechanism and the clamping mechanism are fixed by a threaded connection to form a complete flexible clamping device for brazing pipe fittings and joints. Before use, the flexible clamping device should first be placed in a suitable position on the work platform, or securely fixed to a suitable position on the worktable by other means. In use, first move the locking handle to the "Release" side to allow the clamping mechanism to rotate freely; then adjust the clamping mechanism to the approximate target position, and move the locking handle to the "Lock" side to fix the clamping mechanism; according to the diameter of the workpiece to be worked on, rotate the clamping handle counterclockwise to open the movable arm, the opening range being such that the clamping jaws are slightly larger than the diameter of the workpiece; place the part of the workpiece that does not affect the work and is easy to clamp at the clamping jaws, and rotate the clamping handle clockwise until the workpiece is fully clamped and fixed; release the locking handle again, and adjust the clamping mechanism (including the workpiece, if necessary, move the entire flexible clamping device) to the target position for workpiece work, and then lock the locking handle to complete the clamping of one workpiece; perform work on the workpiece as required; after the work is completed, release the clamping handle, remove the workpiece, and put in the next workpiece to be worked on, clamping it directly. This cycle can be repeated to work on a batch of similar workpieces. It features quick and efficient clamping, flexible and convenient operation, stable clamping, and strong adaptability.

[0055] The above description is merely an exemplary embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. The scope of protection of the present utility model is determined by the appended claims.

Claims

1. A flexible clamping device for brazing pipe fittings, characterized in that, include: A locking mechanism, comprising a chassis, a universal ball and a universal ball limiting cover, wherein the chassis is fixedly installed and the universal ball installed on the top can rotate around the center of the universal ball; The clamping mechanism includes a slot on the universal ball limiting cover, through which a support rod, connected to the universal ball, extends and connects to the clamping mechanism. The clamping mechanism is connected to the universal ball via a support beam. The support rod can swing freely within the slotted area of ​​the omnidirectional ball limiting cover, the omnidirectional ball limiting cover can rotate 360° horizontally relative to the chassis, and the support beam can rotate 360° relative to the omnidirectional ball along its axis. When the clamping mechanism is used to clamp the brazing of the pipe fitting, it can switch the position of the clamped pipe fitting along the spherical surface with the center of the universal ball as the center and the distance from the center of the ball to the clamping position of the pipe fitting as the radius. Since the support beam itself can rotate along the axial direction, it can achieve 360° direction switching when the clamped pipe fitting is located at a predetermined point on the spherical surface.

2. The flexible clamping device for brazing pipe fittings as described in claim 1, characterized in that, The slot on the universal ball limiting cover is a 90° downward slot starting from the vertical direction of the universal ball center. The support beam drives the clamped pipe to switch positions on the upper hemisphere surface with the universal ball center as the center and the pipe clamping position as the radius.

3. The flexible clamping device for brazing pipe fittings as described in claim 1, characterized in that, The locking mechanism further includes: The support column is a hollow cylindrical structure and is vertically fixed to the chassis by multiple screws; The fixing plate has a stepped hole on the inner side of the top of the support column, and a fixing plate with a thickness smaller than the depth of the stepped hole is installed in the stepped hole. A stud is provided in the center of the fixing plate, and a central hole is provided in the center of the fixing plate. A stud is vertically inserted into the central hole and fixed by two nuts from the top and bottom sides of the fixing plate respectively. A blind hole is provided in the center of the chassis. The downward length of the stud through the fixing plate is based on the contact between the unthreaded end of the stud and the bottom end of the blind hole in the center of the chassis. A tightening plate and a locking handle are provided. The tightening plate has a threaded hole in the center, and the nut on the upper side of the stud is screwed into the tightening plate through the threaded hole. The tightening plate has a locking handle that is fixedly connected by threads on its side. The movable top block has a blind hole at the center of its lower end face for fitting the top of the stud, and a concave spherical surface on its upper end face with a diameter that matches the outer diameter of the universal ball, for placing or lifting the universal ball. The support shell has a circumferentially outward protrusion at its bottom end, and the main body of the support shell is a hollow cylinder. The lower end of the support shell is fixedly connected to the support column and presses against the fixing plate. The fixing plate is secured to the support shell and support column by multiple evenly distributed screws. The upper end of the support shell has an inwardly extending portion that mates with the protrusion at the bottom end of the ball-mounted cover to fit the ball-mounted cover. The side wall of the support shell has an axial 45° opening as a handle passage groove for the locking handle to extend out. When the omnidirectional ball is adjusted to the desired position, and the locking handle is moved to the side of the support shell opening, the tightening plate will move axially upward along the stud. The movable top block, omnidirectional ball, and omnidirectional ball limiting cover will be driven to move in the same direction and press together until the protruding part at the bottom of the omnidirectional ball limiting cover is pressed against the inner part of the support shell, thus locking and fixing the omnidirectional ball. Conversely, when the locking handle is moved to the other side of the support shell opening, the tightening plate will move axially downward along the stud. The movable top block, omnidirectional ball, and omnidirectional ball limiting cover will be driven to move in the same direction, thus allowing the omnidirectional ball to loosen and move freely.

4. The flexible clamping device for brazing pipe fittings as described in claim 1, characterized in that, The clamping mechanism further includes: A support arm plate, the support arm plate being L-shaped, with the support beam fixedly connected to the top of the corner of the support arm plate; The movable arm plate is V-shaped, and one end of the movable arm is rotatably connected to the middle part of the long side of the support arm plate via a rotating shaft; The first follower shaft has a through hole in the middle. The first follower shaft is located at the top corner of the movable arm plate and can rotate by an angle along the plane direction where the support arm plate and the movable arm plate are located. The second follower shaft has a threaded hole in the middle. The second follower shaft is located at the end of the long side of the support arm plate and can rotate by an angle along the plane direction where the support arm plate and the movable arm plate are located. A long screw, the long screw passing through a threaded hole in the second follower shaft, the rear end of the long screw passing through a through hole in the first follower shaft, and fixedly disposed in the first follower shaft in the axial direction of the long screw. When the long screw rotates, it changes its relative position with the second follower shaft, which in turn causes the first follower shaft to change its relative position with the second follower shaft. This changes the relative position of the other end of the short side of the support arm plate and the other end of the movable arm plate, thereby enabling the clamping mechanism to clamp or release the pipe fitting.

5. The flexible clamping device for brazing pipe fittings as described in claim 4, characterized in that, The clamping mechanism further includes: a first fixing pin, wherein the support beam and the two support arm plates are respectively riveted and fixed by two first fixing pins, and the two support arm plates are riveted and fixed at the other end by a third fixing pin to form a support arm.

6. The flexible clamping device for brazing pipe fittings as described in claim 4, characterized in that, The clamping mechanism further includes a movable clamping block and a fixed shaft. The movable clamping block is riveted to the other end of the movable arm plate via the fixed shaft, and the movable clamping block is rotatable relative to the fixed shaft. The pipe fittings are positioned and clamped by the combined force of the V-shaped angle and the movable clamping block set at the top of the support beam.

7. The flexible clamping device for brazing pipe fittings as described in claim 4, characterized in that, The clamping mechanism further includes a second fixing pin, which is used to rivet and fix the middle part of the movable arm plate to form a movable arm.

8. The flexible clamping device for brazing pipe fittings as described in claim 4, characterized in that, The clamping mechanism further includes a clamping handle disposed at the end of the long screw, used to reduce the force required to rotate the long screw through leverage. The clamping handle can clamp the movable arm and the support arm by rotating the long screw clockwise, and can release the movable arm and the support arm by rotating the long screw counterclockwise.

9. The flexible clamping device for brazing pipe fittings as described in claim 4, characterized in that, The clamping mechanism further includes two retaining rings, which are fixedly disposed on both sides of the long screw located on the first follower shaft, for axially limiting the long screw. During clockwise rotation of the long screw, the distance between the first and second follower shafts increases. Using the rotation shaft as a fulcrum, the long screw pushes the first follower shaft through the retaining ring, thereby pushing the movable arm to achieve the clamping function. Conversely, during counterclockwise rotation of the long screw, the distance between the first and second follower shafts decreases. Using the rotation shaft as a fulcrum, the long screw pulls the first follower shaft through the retaining ring, thereby pulling the movable arm to achieve the releasing function.

10. The flexible clamping device for brazing pipe fittings as described in claim 1, characterized in that, Also includes: A fixing nut and a double-ended stud are provided. The double-ended stud is threaded onto the universal ball joint, and the double-ended stud is connected to the support beam through the fixing nut.

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