Ultrasonic welding device for positive pressure joint

Abstract

The invention discloses an ultrasonic welding device for a positive pressure joint, and relates to the technical field of welding devices. The welding device comprises a handle and a plurality of welding heads, and further comprises a fixing frame installed on the handle, and supporting cylinders with the same amount as the welding heads are installed on the fixing frame in a penetrating mode; and the rotating frames are the same as the supporting cylinders in quantity, the rotating frames are rotationally installed on the fixing frame and surround the outer sides of the corresponding supporting cylinders, adjusting bases are installed on the rotating frames in a sliding mode, and the welding heads are installed on the adjusting bases. According to the welding device, circular seams between a plurality of valve bodies and a shell can be welded at the same time, assembling of small-batch positive pressure connectors is facilitated, orderly proceeding of the whole research and development testing work is facilitated, and compared with the mode that a welding head is manually driven to rotate around a welding seam for welding, the position of the welding head is more stable in the welding process, and the welding quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of welding devices, and in particular to an ultrasonic welding device for a positive pressure joint. Background Art

[0002] The positive pressure connector used for intravenous infusion can generate positive pressure when disconnecting the syringe or infusion tube, preventing blood backflow and reducing the risk of thrombosis.

[0003] Considering that commonly used materials for medical connectors include medical-grade polycarbonate (PC), polypropylene (PP), silicone, etc., which are sensitive to heat, the local heating characteristics of ultrasonic welding (acting only on the contact surface) can prevent the overall material from being deformed or degraded due to heat. Ultrasonic welding generates heat through high-frequency vibration friction to weld the materials, without the need for glue, solvents or other chemical adhesives, thus avoiding the risk of chemical residue contamination and meeting the biocompatibility requirements of medical devices (ISO10993). Therefore, ultrasonic welding is used to fix the structure during the production of positive pressure connectors.

[0004] During the development of small batch prototypes of positive pressure connectors, a handheld ultrasonic welding device is needed to complete the prototype trial production. During this stage, parameters need to be constantly adjusted and tested to develop qualified products. Therefore, a suitable welding device will help the assembly work during the development of positive pressure connectors.

[0005] The currently used ultrasonic welding device requires a person to hold the electric welding head and circle around the valve body and the shell for welding. Considering the small size of the positive pressure joint, the welding operation area is small, and the welding process requires high capabilities of the workers. Moreover, when performing welding operations, only single-piece welding is performed. For the research and development and manufacturing of the same type of positive pressure joints in the same batch, only a single welding operation can be completed, and small-batch centralized manufacturing cannot be achieved, which affects the progress of research and development testing.

[0006] Therefore, the present invention provides an ultrasonic welding device for positive pressure joints. Summary of the invention

[0007] The purpose of the present invention is to solve the problems in the above-mentioned background technology. The present invention provides an ultrasonic welding device for positive pressure joints.

[0008] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: An ultrasonic welding device for a positive pressure joint comprises a handle and a plurality of welding heads, and further comprises: A fixing frame is installed on the handle, and a supporting cylinder having the same number as the welding head is installed through the fixing frame; A rotating frame of the same size as the supporting tube is rotatably mounted on the fixed frame and surrounds the outer side of the corresponding supporting tube. An adjusting seat is slidably mounted on the rotating frame, and the welding head is mounted on the adjusting seat. An adjustment mechanism is installed on the fixing frame, and the distances between the plurality of adjustment seats and the corresponding support cylinders are synchronously adjusted by the adjustment mechanism; Among them, a plurality of rotating frames are linked together, and when one of the rotating frames rotates, the other rotating frames rotate synchronously.

[0009] Furthermore, a mounting hole is provided on the fixed frame, a bearing is sleeved on the outer side of the rotating frame, and the bearing is connected to the mounting hole through a flexible member. The flexible member allows the bearing to perform a certain degree of planar movement in the mounting hole, and the rotating frame is movably connected to the support tube.

[0010] Furthermore, a synchronous wheel is mounted on the rotating frame, and multiple synchronous wheels are connected through a synchronous belt transmission. A tensioning block is elastically and slidably installed in the fixed frame, and a column rod is constructed on the tensioning block. Under the elastic resistance force of the tensioning block, the circumference of the column rod contacts the side of the synchronous belt to keep the synchronous belt taut.

[0011] Furthermore, the adjustment mechanism comprises a sliding frame sleeved on the outside of the rotating frame, a slider is slidably mounted on the sliding frame, a linkage rod is hinged between the slider and the adjustment seat, and an adjustment component for driving multiple sliding frames to move is installed on the fixed frame.

[0012] Furthermore, sliding plates are elastically slidably mounted on opposite sides of two adjacent sliding frames, a connecting plate is elastically slidably connected between the two adjacent sliding plates, and the adjustment component acts on one of the connecting plates.

[0013] Furthermore, a plurality of through grooves are opened on the peripheral side of the end of the support tube, a plurality of support rods are rotatably installed inside the support tube, and a support member acting on the plurality of support rods is installed on the fixed frame, so that the free ends of the plurality of support rods can synchronously pass through the through grooves or be received in the through grooves through the support member.

[0014] Furthermore, the spreading member includes a driving rod slidably inserted in the supporting tube, a transmission rod is hinged between the driving rod and the supporting rod, a moving frame is slidably mounted on the fixed frame, a notch is constructed on the moving frame, and two limit plates are constructed at one end of the driving rod away from the supporting rod, and opposite sides of the two limit plates are respectively attached to two end surfaces of the moving frame with the notch, and a gap is left between the driving rod and the notch.

[0015] Furthermore, a rotating frame rod is rotatably mounted on the handle, a forcing rod is constructed on the rotating frame rod, a movable groove is opened on the movable frame, the forcing rod slides tangentially in the movable groove, and an elastic telescopic rod is installed between the movable frame and the fixed frame.

[0016] Furthermore, the flexible part is annular and made of silicone, with a hardness between Shore A85 and 100, a thickness between 2cm and 4cm, and a ratio of inner diameter to outer diameter of 1:2.

[0017] Furthermore, the adjustment assembly includes an adjustment screw vertically and rotatably mounted on the fixed frame, one end of the adjustment screw is located outside the fixed frame, one of the connecting plates is threadedly sleeved on the adjustment screw, one of the connecting plates is constructed with a pointer located outside the fixed frame, and a scale is provided outside the fixed frame.

[0018] The beneficial effects of the present invention are as follows: The present invention realizes simultaneous welding of annular seams between multiple valve bodies and outer shells, which is beneficial to the assembly of small batches of positive pressure joints and the orderly progress of the entire research and development test work. Compared with manually driving the welding head to rotate around the weld seam for welding, the position of the welding head during the welding process is more stable, thereby ensuring the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 The present invention Figure 1 Schematic diagram from another perspective; Figure 3 The present invention Figure 1 Partial stereoscopic cutaway Figure 1 ; Figure 4 The present invention Figure 1 Partial stereoscopic cutaway Figure 2 ; Figure 5 The present invention Figure 1 Partial stereoscopic cutaway Figure 3 ; Figure 6 The present invention Figure 2 A partial three-dimensional cross-sectional view of Figure 7 It is a partial structural schematic diagram of the present invention; Figure 8 It is a schematic diagram of the structure of the sliding frame of the present invention; Fig. 9 The present invention Figure 8 Another perspective diagram; Fig.10 Is a diagram of the present invention, the rotating rod and the motor structure connection; Fig.11 The present invention Figure 3 A magnified view of the structure in the middle; Fig.12 The present invention Figure 3 A magnified view of the structure at B in the middle; Fig.13 The present invention Figure 4 A magnified view of the structure at C in the middle; 1. Handle; 2. Welding head; 3. Fixed frame; 4. Support tube; 5. Rotating frame; 6. Adjusting seat; 7. Adjusting mechanism; 8. Mounting hole; 9. Bearing; 10. Flexible member; 11. Synchronous wheel; 12. Synchronous belt; 13. Tension block; 14. Column; 15. Sliding frame; 16. Linking rod; 17. Adjusting assembly; 1701. Adjusting screw; 1702. Pointer; 1703. Scale; 18. Sliding plate; 19. Connecting plate; 20. Groove; 21. Support rod; 22. Spreading member; 2201. Drive rod; 2202. Transmission rod; 2203. Moving frame; 2204. Notch; 2205. Limiting plate; 23. Rotating frame rod; 24. Forcing rod; 25. Movable groove; 26. Elastic telescopic rod; 27. Sliding block. DETAILED DESCRIPTION

[0020] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] like Figure 1-Figure 13 As shown, an ultrasonic welding device for a positive pressure joint proposed in one embodiment of the present invention includes a handle 1 and a plurality of welding heads 2, wherein the welding heads 2 are ultrasonic spot welding heads. In this embodiment, there are three welding heads 2, and further includes: The fixing frame 3 is connected to the handle 1. When performing welding operations, the worker needs to hold the handle 1 to adjust the position of the structure installed on the handle 1. Figure 3 As shown, the interior of the fixing frame 3 is hollow for accommodating the structure, and the fixing frame 3 is penetrated by support tubes 4 equal to the number of welding heads 2, one end of the support tubes 4 passes through the fixing frame 3 and is located outside, and multiple support tubes 4 are distributed in a linear array on the fixing frame 3, wherein the diameter of the support tubes 4 is smaller than the inner diameter of the valve body to be welded, and the support tubes 4 are used to be inserted inside the valve body to be welded, and play the purpose of auxiliary support and positioning; A rotating frame 5 equal to the supporting tube 4 is rotatably mounted on the supporting tube 4. The outer side of the rotating frame 5 is rotatably mounted on the fixed frame 3. An adjusting seat 6 is slidably mounted on the rotating frame 5. The sliding direction of the adjusting seat 6 is perpendicular to the axis of the supporting tube 4. A convex block is constructed on the adjusting seat 6. The welding head 2 is mounted in the direction where the convex block faces the supporting tube 4. The welding head 2 has a certain inclination angle to ensure that the welding head 2 can weld the annular seam between the valve body and the shell. The adjusting mechanism 7 is mounted on the fixing frame 3 and acts on the adjusting seat 6. The adjusting mechanism 7 synchronously adjusts the spacing between the plurality of adjusting seats 6 and the corresponding supporting cylinders 4, so as to adapt to the welding of valve bodies with different outer diameters and the outer shell, thereby improving the applicability of the device; Among them, multiple rotating frames 5 are linked with each other. When one of the rotating frames 5 rotates, the other multiple rotating frames 5 rotate synchronously. That is to say, only one power is needed to drive one of the rotating frames 5 to rotate, and the other rotating frames 5 will rotate synchronously. First, the shell and the valve body are fixedly docked by a fixture, and then the personnel hold the handle 1 and synchronously adjust the positions of the three adjustment seats 6 through the adjustment mechanism 7 according to the annular seam to be welded, thereby indirectly adjusting the positions of the three welding heads 2. Subsequently, the support cylinders 4 are respectively inserted into the corresponding valve bodies, and the auxiliary positioning of the support cylinder 4 is completed through the valve body. Then, one of the rotating frames 5 is driven to rotate, and the other rotating frames 5 will also rotate synchronously, and then the welding head 2 is driven to rotate around the docking position of the shell and the valve body to complete the welding work between the valve body and the shell, and the annular seams between multiple valve bodies and shells are welded at the same time, which is conducive to completing the assembly of small batches of positive pressure joints and the orderly progress of the entire research and development test work. Compared with manually driving the welding head 2 to rotate around the weld, the position of the welding head 2 is more stable during the welding process, thereby ensuring the welding quality.

[0022] like Figure 1 and Fig.11As shown, in some embodiments, a mounting hole 8 is provided on the fixed frame 3, a bearing 9 is sleeved on the outer side of the rotating frame 5, the bearing 9 is connected to the mounting hole 8 through a flexible member 10, the outer peripheral side of the rotating frame 5 is connected to the inner ring of the bearing 9, the outer ring of the bearing 9 is connected to the flexible member 10, the flexible member 10 is installed in the mounting hole 8, the flexible member 10 is used to enable the bearing 9 to perform a certain degree of planar movement in the mounting hole 8, the flexible member 10 provides certain support and limitation to the bearing 9 to avoid excessive movement, and serves the purpose of assisting resetting, wherein the rotating frame 5 can drive the support tube 4 to move together during the planar movement, considering that in the process of small-scale development of positive pressure joints, due to some factors such as production technology, proficiency of staff, and accuracy of production equipment, the spacing between two adjacent positive pressure joints is not consistent, if there are three positive pressure joints that need to be welded, then the three positive pressure joints have two spacings, respectively It is the spacing A and the spacing B. The actual situation is that the spacing values ​​between the spacing A and the spacing B are not necessarily consistent, so the position of the corresponding welding head 2 also needs an adaptive adjustment. Since the outer diameter of the support tube 4 is smaller than the inner diameter of the valve body, the support tube 4 can be inserted into the corresponding valve body within a certain error. When the support tube 4 is inserted into the interior of the valve body, the valve body serves the purpose of auxiliary positioning for the support tube 4. Then the corresponding rotating frame 5 will also adaptively change its position under the positioning of the support tube 4. At this time, the influence of tolerance can be overcome to ensure that each group of welding heads 2 can match the appropriate welding position. For convenience, the adjustment of the position of the welding head 2 is unified, but there may be deviations in the welding points of each welding head 2 to the positive pressure joint. Therefore, a single welding head 2 adapts to the tolerance through a small range of adjustment, thereby meeting the separate welding work of each positive pressure joint, improving applicability, and ensuring that multiple positive pressure joints can complete the welding work smoothly.

[0023] like Figure 1 , Figure 3 , Figure 5 and Figure 6As shown, in some embodiments, multiple rotating frames 5 are each equipped with a synchronous wheel 11, and multiple synchronous wheels 11 are connected through a synchronous belt 12. The synchronous wheel 11 and the synchronous belt 12 are the pulley and the transmission belt in the prior art, and can also be a sprocket and a chain. A tensioning block 13 is elastically and slidably installed in the fixed frame 3, and a column 14 is constructed on the tensioning block 13. Under the elastic resistance of the tensioning block 13, the side of the column 14 resists against the side of the synchronous belt 12 to keep the synchronous belt 12 tight. Specifically, a slide groove is opened on the fixed frame 3, and the tensioning block 13 is slidably installed in the slide groove. A spring piece is installed between the tensioning block 13 and the slide groove to provide resistance to the tensioning block 13. Of course, the tensioning The number of blocks 13 can be multiple. In the present embodiment, the number of the tensioning blocks 13 is two, and they are designed diagonally with respect to the middle support tube 4, so as to further prevent the belt from getting loose. When the bearing 9 moves in the plane due to the action of the flexible member 10, because the synchronous wheel 11 is mounted on the rotating frame 5, when the bearing 9 moves to drive the rotating frame 5 to move, the corresponding synchronous wheel 11 will also move. In order to prevent the synchronous belt 12 from getting loose when the synchronous wheel 11 moves, the tensioning block 13 is used under the elastic resistance force to make the column rod 14 always contact the side of the synchronous belt 12, thereby preventing the synchronous belt 12 from getting loose and ensuring that multiple rotating frames 5 can rotate at the same time.

[0024] like Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, in some embodiments, the adjustment mechanism 7 includes a sliding frame 15 movably mounted on the rotating frame 5, and a slider 27 is slidably mounted on the sliding frame 15. The slider 27 can make a circular motion around the axis of the support tube 4. In this embodiment, an annular groove is opened on the sliding frame 15 around the axis of the support tube 4. The slider 27 is arc-shaped and slidably arranged in the annular groove. A linkage rod 16 is hinged between the slider 27 and the adjustment seat 6. An adjustment component 17 for driving multiple sliding frames 15 to move along the axis of the support tube 4 is installed on the fixed frame 3. That is to say, through the adjustment component 1 When the sliding frame 15 is driven to move, the movement of the sliding frame 15 will pull the slider 27 connected thereto to move. Because the connecting rod 16 is hinged on the slider 27, the sliding frame 15 will pull the adjusting seat 6 to move through the connecting rod 16 when moving. As the adjusting seat 6 moves on the rotating frame 5, the distance between the welding head 2 and the supporting cylinder 4 is changed, which can adapt to the welding work of positive pressure joints of different sizes. The sliding frame 15 will not interfere with the rotation of the rotating frame 5, so the slider 27 can rotate in the annular groove, thereby meeting the rotation requirement of the welding head.

[0025] like Figure 7 , Figure 8 , Fig. 9 and Fig.13As shown, in some embodiments, sliding plates 18 are elastically slidably installed on opposite sides of two adjacent sliding frames 15, and a connecting plate 19 is elastically slidably connected between the two adjacent sliding plates 18. The adjusting component 17 acts on one of the connecting plates 19. A slot 1 is provided on the sliding frame 15, and the sliding plate 18 is slidably arranged in the slot 1 and a spring piece is installed between the slot 1 and the sliding plate 18. A slot 2 is provided on the opposite sides of the two sliding plates 18, and both ends of the connecting plate 19 are respectively inserted into the slot 2, and a spring piece is installed between the slot 2 and the connecting plate 19. The adjusting component 17 acts on one of the connecting plates 19, and the remaining connecting plates 19 are all provided with guide holes. A guide rod that slides and is inserted into the guide hole is installed on the fixing frame 3, and a wide groove ( Fig.13 As can be observed in the figure, the sliding frame 15 passes through the wide groove and is located in the fixed frame 3, and a gap is left between the wide groove and the sliding frame 15. In this way, when the rotating frame 5 moves in the plane because of the bearing 9, the sliding frame 15 has a certain plane movement ability under the action of the sliding plate 18 and the connecting plate 19, wherein the position of the connecting plate 19 is fixed, but the sliding plate 18 can move relative to the connecting plate 19, thereby driving the sliding frame 15 to move, and can also move and reset under the action of the spring sheet, ensuring that the positions of multiple adjustment seats 6 can be adjusted synchronously without affecting the normal rotation of the rotating frame 5.

[0026] like Figure 3 and Fig.12 As shown, in some embodiments, a plurality of through grooves 20 are opened on the peripheral side of the end of the support tube 4, and also include a plurality of support rods 21 rotatably installed in the support tube 4 at one end, and a spreading piece 22 acting on the plurality of support rods 21 is installed on the fixing frame 3, and the spreading piece 22 is used to make the free ends of the plurality of support rods 21 synchronously pass through the through grooves 20 or be received in the through grooves 20, and the diameter of the support tube 4 is smaller than the inner diameter of the valve body. When the plurality of support tubes 4 are respectively inserted into the corresponding valve bodies, the plurality of support rods 21 located in the support tube 4 can be made to pass through the through grooves 20 or be received in the through grooves 20 through the spreading piece 22. At the same time, it rotates, thereby passing through the through groove 20 and abutting against the inner wall of the valve body. After multiple support rods 21 abut against the inner wall of the valve body, the support tube 4 is forced to be coaxial with the corresponding valve body. After the support rods 21 abut against the inner wall of the valve body, the rotating frame 5 is forced to move to be coaxial with the valve body. Because the sliding frame 15 is movably mounted on the rotating frame 5, the sliding frame 15 will also be synchronously adjusted at this time. In this way, it is ensured that when the rotating frame 5 rotates, the welding head 2 makes a circular motion around the axis of the valve body, ensuring that the welding position between each valve body and the outer shell can be welded.

[0027] like Figure 7 , Fig.10 and Fig.12As shown, in some embodiments, the expansion member 22 includes a driving rod 2201 slidably inserted in the support tube 4, a transmission rod 2202 is hinged between the driving rod 2201 and the support rod 21, a moving frame 2203 is slidably installed on the fixed frame 3, and a notch 2204 is configured on the moving frame 2203. Two limiting plates 2205 are configured at one end of the driving rod 2201 away from the support rod 21, and the opposite sides of the two limiting plates 2205 are respectively attached to the two end surfaces of the moving frame 2203 configured with the notch 2204, and a gap is left between the driving rod 2201 and the notch 2204, as shown in FIG. Fig.11 As shown, after all the welding heads 2 are adjusted in position synchronously, when there is a certain deviation between the welding head 2 and the corresponding positive pressure joint to be welded, the support cylinder 4 is inserted into the welded valve body to drive the moving frame 2203 to move. The moving frame 2203 will move along the axis direction of the support rod 21 in the direction away from the support rod 21, thereby pulling the driving rod 2201 to move. Because the driving rod 2201 is hinged to the support rod 21 through the transmission rod 2202, the movement of the driving rod 2201 will drive the free ends of the multiple support rods 21 to move away from each other, so that the multiple support rods 21 are in contact with the inner wall of the valve body. During the whole process, the positions of the support cylinder 4 and the rotating frame 5 will change. When the position of the support cylinder 4 changes, it is bound to cause a certain adjustment in the position of the driving rod 2201. Due to the existence of the gap, this adjustment can be adapted. One end of the moving frame 2203 is located outside, and the moving frame 2203 can be driven to move by manual pulling, or it can be An electric push rod is used to drive the movement of the moving frame 2203. Without affecting the movement and calibration of the rotating frame 5, it can also drive the support rods 21 in the multiple support tubes 4 to move at the same time, which is more convenient to use. The rotation drive of the rotating frame 5 is as follows: a reduction motor is installed on one of the driving rods 2201, and the mounting inner hole of the reduction motor is kept coaxial with the driving rod 2201. A gap is left between the driving rod 2201 and the mounting inner hole of the reduction motor. A ring sleeve is provided on the mounting inner hole of the reduction motor. An annular disk is constructed at one end of the ring sleeve away from the reduction motor. A plurality of limiting convex plates are constructed in a circle center array at one end of the annular disk. A plurality of limiting slots are provided on the corresponding outer peripheral side of the rotating frame 5. The limiting convex plates are slidably inserted in the limiting slots. The limiting convex plates do not contact the synchronous wheel 11. Therefore, the rotating frame 5 is driven to rotate during the rotation of the reduction motor. Considering the linear movement of the driving rod 2201, a counter connection is achieved under the cooperation of the limiting convex plates and the limiting slots.

[0028] like Figure 2 , Figure 3 and Figure 7As shown, in some embodiments, the present application discloses a method of manually driving the moving frame 2203 to move. The handle 1 is rotatably mounted with an n-shaped rotating frame rod 23, and the rotating frame rod 23 is configured with a forcing rod 24 close to its rotation axis. The moving frame 2203 is provided with a movable groove 25, and the forcing rod 24 slides tangentially in the movable groove 25. In this way, when the rotating frame rod 23 is rotated, relative to the moving frame 2203, the forcing rod 24 moves in the movable groove 25, thereby forcing the moving frame 2203 to move. The lever principle is used to make It is more convenient to move the movable frame 2203. An elastic telescopic rod 26 is installed between the movable frame 2203 and the fixed frame 3. After welding is completed, loosening the rotating frame rod 23 can make the movable frame 2203 move and reset, ensuring that multiple support rods 21 can be moved back into the support tube 4. The elastic telescopic rod 26 includes a sleeve and a sleeve rod slidably inserted in the sleeve. A spring is installed between the sleeve and the sleeve rod. One end of the sleeve is connected to the outside of the fixed frame 3, and one end of the sleeve rod is connected to the movable frame 2203 located outside the fixed frame 3.

[0029] like Fig.11 As shown, in some embodiments, the flexible member 10 is annular and made of silicone, and its hardness is between Shore A85 and 100, the thickness of the flexible member 10 is between 2 cm and 4 cm, and the ratio of the inner diameter to the outer diameter is 1:2. According to the parameters, the flexible member 10 is made of silicone but has a certain bearing capacity. When there is no manual pulling of the rotating frame rod 23, the bearing 9 and the mounting hole 8 maintain a relative balance state. After the bearing 9 is slightly offset, the bearing 9 can also be reset by the elastic deformation characteristics of the flexible member 10 itself after the moving frame 2203 moves and resets.

[0030] like Figure 3 As shown, in some embodiments, the adjustment component 17 includes an adjustment screw 1701 vertically and rotatably mounted on the fixed frame 3, one end of the adjustment screw 1701 is located outside the fixed frame 3, one of the connecting plates 19 is threadedly sleeved on the adjustment screw 1701, one of the connecting plates 19 is constructed with a pointer 1702 located outside the fixed frame 3, and a scale 1703 is provided on the outside of the fixed frame 3. The design of the adjustment screw 1701 enables the staff to intuitively know the distance moved by the welding head 2 by cooperating with the scale 1703 and the pointer 1702, so as to facilitate the subsequent circumferential welding of valve bodies of different diameters, and to quickly move the welding head 2 to the corresponding position.

[0031] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An ultrasonic welding device for positive pressure joints, comprising a handle (1) and a plurality of welding heads (2), characterized in that: Also includes: A fixing frame (3) is mounted on the handle (1), and a number of support tubes (4) equal to the number of welding heads (2) are installed through the fixing frame (3); A rotating frame (5) having the same number as the supporting tube (4) is rotatably mounted on the fixed frame (3) and surrounds the outer side of the corresponding supporting tube (4); an adjusting seat (6) is slidably mounted on the rotating frame (5), and the welding head (2) is mounted on the adjusting seat (6); An adjustment mechanism (7) is mounted on the fixing frame (3), and the distances between the plurality of adjustment seats (6) and the corresponding support cylinders (4) are synchronously adjusted through the adjustment mechanism (7); The plurality of rotating frames (5) are linked together, and when one of the rotating frames (5) rotates, the remaining rotating frames (5) rotate synchronously.

2. The ultrasonic welding device for positive pressure joint according to claim 1, characterized in that: The fixed frame (3) is provided with a mounting hole (8), the outer side of the rotating frame (5) is sleeved with a bearing (9), the bearing (9) is connected to the mounting hole (8) via a flexible member (10), and the bearing (9) is enabled to move in a certain plane in the mounting hole (8) via the flexible member (10), and the rotating frame (5) is movably sleeved with the support tube (4).

3. The ultrasonic welding device for positive pressure joint according to claim 1, characterized in that: The rotating frame (5) is provided with a synchronous wheel (11), and the plurality of synchronous wheels (11) are connected to each other by means of a synchronous belt (12). A tension block (13) is elastically slidably mounted in the fixed frame (3), and a column (14) is constructed on the tension block (13). Under the elastic resistance force of the tension block (13), the circumferential side of the column (14) contacts the side of the synchronous belt (12), so that the synchronous belt (12) remains taut.

4. The ultrasonic welding device for positive pressure joint according to claim 1, characterized in that: The adjustment mechanism (7) comprises a sliding frame (15) sleeved on the outside of the rotating frame (5), a slider (27) being slidably mounted on the sliding frame (15), a linkage rod (16) being hinged between the slider (27) and the adjustment seat (6), and an adjustment assembly (17) for driving the plurality of sliding frames (15) to move being mounted on the fixed frame (3).

5. The ultrasonic welding device for positive pressure joint according to claim 4, characterized in that: Sliding plates (18) are elastically slidably mounted on opposite sides of two adjacent sliding frames (15), a connecting plate (19) is elastically slidably connected between the two adjacent sliding plates (18), and the adjustment component (17) acts on one of the connecting plates (19).

6. The ultrasonic welding device for positive pressure joints according to claim 1, characterized in that: A plurality of through slots (20) are formed around the end of the support tube (4), a plurality of support rods (21) are rotatably mounted inside the support tube (4), and a spreading member (22) acting on the plurality of support rods (21) is mounted on the fixing frame (3), so that the free ends of the plurality of support rods (21) can synchronously pass through the through slots (20) or be received in the through slots (20) through the spreading member (22).

7. The ultrasonic welding device for positive pressure joints according to claim 6, characterized in that: The spreading member (22) comprises a driving rod (2201) slidably inserted into the supporting tube (4); a transmission rod (2202) is hinged between the driving rod (2201) and the supporting rod (21); a moving frame (2203) is slidably mounted on the fixed frame (3); a notch (2204) is formed on the moving frame (2203); two limiting plates (2205) are formed at one end of the driving rod (2201) away from the supporting rod (21); opposite sides of the two limiting plates (2205) are respectively attached to two end surfaces of the moving frame (2203) having the notch (2204); and a gap is left between the driving rod (2201) and the notch (2204).

8. The ultrasonic welding device for positive pressure joints according to claim 7, characterized in that: A rotating frame rod (23) is rotatably mounted on the handle (1), a forcing rod (24) is constructed on the rotating frame rod (23), a movable groove (25) is provided on the movable frame (2203), the forcing rod (24) slides tangentially in the movable groove (25), and an elastic telescopic rod (26) is installed between the movable frame (2203) and the fixed frame (3).

9. The ultrasonic welding device for positive pressure joints according to claim 2, characterized in that: The flexible member (10) is annular and made of silicone material, with a hardness between Shore A85 and 100. The thickness of the flexible member (10) is between 2 cm and 4 cm, and the ratio of the inner diameter to the outer diameter is 1:

2.

10. The ultrasonic welding device for positive pressure joints according to claim 5, characterized in that: The adjustment assembly (17) comprises an adjustment screw (1701) vertically and rotatably mounted on the fixing frame (3), one end of the adjustment screw (1701) being located outside the fixing frame (3), one of the connecting plates (19) being threadedly sleeved on the adjustment screw (1701), one of the connecting plates (19) being provided with a pointer (1702) located outside the fixing frame (3), and a scale (1703) being provided outside the fixing frame (3).

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