An ultrasonic welding device for a positive pressure connector

Abstract

The present invention discloses an ultrasonic welding device for a positive pressure joint, which relates to the technical field of welding devices. The present invention includes a handle and a plurality of welding heads, and further includes: a fixing frame installed on the handle, and a support cylinder equal in number to the welding heads is installed through the fixing frame; a rotating frame equal in number to the support cylinder is rotatably installed on the fixing frame and surrounds the corresponding support cylinder on the outside, an adjusting seat is slidably installed on the rotating frame, and the welding head is installed on the adjusting seat. The present invention realizes the simultaneous welding of the circumferential seams between a plurality of valve bodies and the housings, which is beneficial to the assembly of small batches of positive pressure joints, is beneficial to the orderly progress of the entire R & D and testing work, and compared with manually driving the welding head to rotate around the weld for welding, the position of the welding head is more stable during the welding process, ensuring the welding quality.

Description

Technical Field

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

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

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

[0004] During the small-batch prototype development of positive pressure connectors, a handheld ultrasonic welding device is needed to complete the prototype trial production work. During this stage, parameters need to be continuously adjusted and tested to develop qualified products. Therefore, a suitable welding device is helpful for the assembly work during the R & D process of positive pressure connectors.

[0005] The currently used ultrasonic welding device requires manual holding of the welding head to circle around between the valve body and the outer shell for welding. Considering the small size of the positive pressure connector, the welding operation area is small, the requirements for the staff's ability during the welding process are high, and during the welding operation, it is only single-piece welding at a time. For the R & D and manufacturing of the same type of positive pressure connectors in the same batch, only single welding can be completed, and small-batch centralized manufacturing cannot be achieved, affecting the progress of R & D and testing work.

[0006] Therefore, the present invention proposes an ultrasonic welding device for a positive pressure connector. Summary of the Invention

[0007] The purpose of the present invention is: to solve the problems in the above background art, the present invention provides an ultrasonic welding device for a positive pressure connector.

[0008] The present invention specifically adopts the following technical solutions to achieve the above purpose:

[0009] An ultrasonic welding device for a positive pressure connector, including a handle and a plurality of welding heads, further comprising:

[0010] A fixing frame, installed on the handle, and a support cylinder equal in number to the welding heads is installed through the fixing frame;

[0011] A rotary frame equal in quantity to the support cylinder is rotatably installed on the fixed frame and surrounds the outside of the corresponding support cylinder. An adjusting seat is slidably installed on the rotary frame, and a welding head is installed on the adjusting seat;

[0012] An adjusting mechanism is installed on the fixed frame to synchronously adjust the distance between multiple adjusting seats and the corresponding support cylinders through the adjusting mechanism;

[0013] Among them, multiple rotary frames are linked. When one rotary frame rotates, the remaining rotary frames rotate synchronously.

[0014] Furthermore, mounting holes are provided on the fixed frame. A bearing is sleeved outside the rotary frame, and the bearing is connected in the mounting holes through a flexible member, so that the bearing can perform a certain degree of planar movement in the mounting holes through the flexible member, and the rotary frame is movably sleeved with the support cylinder.

[0015] Furthermore, synchronous pulleys are sleeved on the rotary frames, and the multiple synchronous pulleys are connected by a synchronous belt for transmission. A tensioning block is elastically slidably installed inside the fixed frame, and a column rod is formed on the tensioning block. Under the elastic contact force of the tensioning block, the side of the column rod abuts against the side of the synchronous belt to keep the synchronous belt taut.

[0016] Furthermore, the adjusting mechanism includes a sliding frame sleeved outside the rotary frame. A slider is slidably installed on the sliding frame. A linkage rod is hinged between the slider and the adjusting seat, and an adjusting component for driving multiple sliding frames to move is installed on the fixed frame.

[0017] Furthermore, sliding plates are elastically slidably installed on the opposite sides of two adjacent sliding frames, and a connecting plate is elastically slidably connected between the two adjacent sliding plates. The adjusting component acts on one of the connecting plates.

[0018] Furthermore, a plurality of through grooves are provided on the circumferential side of the end of the support cylinder. A plurality of support rods are rotatably installed inside the support cylinder. A spreading member acting on the plurality of support rods is installed on the fixed frame, and the free ends of the plurality of support rods are synchronously passed through or received into the through grooves through the spreading member.

[0019] Furthermore, the spreading member includes a driving rod slidably inserted into the support cylinder. A transmission rod is hinged between the driving rod and the support rod. A moving frame is slidably installed on the fixed frame. A notch is formed on the moving frame. Two limiting plates are formed at the end of the driving rod away from the support rod. The opposite sides of the two limiting plates are respectively attached to the two end faces of the notch formed on the moving frame, and a gap is left between the driving rod and the notch.

[0020] Further, a rotating frame rod is rotatably installed on the handle, a forcing rod is configured on the rotating frame rod, a movable groove is formed on the movable frame, the forcing rod is slidably tangent in the movable groove, and an elastic telescopic rod is installed between the movable frame and the fixed frame.

[0021] Further, the flexible member is annular and made of silica gel, its hardness is between Shore A85 and 100, the thickness of the flexible member is between 2 cm and 4 cm, and the ratio of the inner diameter to the outer diameter is 1:2.

[0022] Further, the adjusting assembly includes an adjusting screw rod that is vertically and rotatably installed on the fixed frame. One end of the adjusting screw rod is located outside the fixed frame. One of the connecting plates is threadedly sleeved on the adjusting screw rod. A pointer located outside the fixed frame is configured on one of the connecting plates, and a scale is arranged outside the fixed frame.

[0023] The beneficial effects of the present invention are as follows:

[0024] The present invention realizes welding the circumferential seams between multiple valve bodies and the outer shell at the same time, which is beneficial to completing the assembly of small batches of positive pressure joints, beneficial to the orderly progress of the entire R & D and testing work, and compared with manually driving the welding head to rotate around the weld for welding, the position of the welding head is more stable during the welding process, ensuring the welding quality. Description of the Drawings

[0025] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 is the present invention Figure 1 Another perspective schematic diagram;

[0027] Figure 3 is the present invention Figure 1 Partial three-dimensional cross-section Figure 1 ;

[0028] Figure 4 is the present invention Figure 1 Partial three-dimensional cross-section Figure 2 ;

[0029] Figure 5 is the present invention Figure 1 Partial three-dimensional cross-section Figure 3 ;

[0030] Figure 6 is the present invention Figure 2 Partial three-dimensional cross-sectional view;

[0031] Figure 7 is a partial structural schematic diagram of the present invention;

[0032] Figure 8 is a structural schematic diagram of the sliding frame of the present invention;

[0033] Figure 9 is a schematic diagram of another perspective of the present invention Figure 8 ; a schematic diagram of another perspective

[0034] Figure 10 is a connection diagram of the rotating rod and the motor structure of the present invention

[0035] Figure 11 is a schematic diagram of the present invention Figure 3 ; an enlarged view of the structure at position A in the present invention

[0036] Figure 12 is a schematic diagram of the present invention Figure 3 ; an enlarged view of the structure at position B in the present invention

[0037] Figure 13 is a schematic diagram of the present invention Figure 4 ; an enlarged view of the structure at position C in the present invention

[0038] Reference numerals: 1, handle; 2, welding head; 3, fixing frame; 4, support cylinder; 5, rotating frame; 6, adjusting seat; 7, adjusting mechanism; 8, mounting hole; 9, bearing; 10, flexible member; 11, synchronous pulley; 12, synchronous belt; 13, tensioning block; 14, column rod; 15, sliding frame; 16, linkage rod; 17, adjusting assembly; 1701, adjusting screw; 1702, pointer; 1703, scale; 18, sliding plate; 19, connecting plate; 20, through slot; 21, support rod; 22, expanding member; 2201, driving rod; 2202, transmission rod; 2203, moving frame; 2204, notch; 2205, limiting plate; 23, rotating frame rod; 24, forcing rod; 25, movable slot; 26, elastic telescopic rod; 27, slider. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0040] As Figures 1 - 13 shown, a kind of ultrasonic welding device for positive pressure joints proposed by an embodiment of the present invention includes a handle 1 and a plurality of welding heads 2. The welding heads 2 are ultrasonic spot welding heads. In this embodiment, the number of welding heads 2 is three. It further includes:

[0041] A fixing frame 3, which is connected to the handle 1. When performing welding operations, the operator needs to hold the handle 1 to adjust the position of the structure installed on the handle 1. As Figure 3As shown, the inside of the fixing frame 3 is hollow for accommodating a structure. A support cylinder 4 equal in number to the welding head 2 is installed through the fixing frame 3. One end of the support cylinder 4 passes through the fixing frame 3 and is located outside. A plurality of support cylinders 4 are linearly arrayed on the fixing frame 3. The diameter of the support cylinder 4 is smaller than the inner diameter of the valve body to be welded. The support cylinder 4 is used to be inserted into the valve body to be welded, serving the purpose of auxiliary support and positioning.

[0042] A rotating frame 5 equal in number to the support cylinder 4. The rotating frame 5 is rotatably sleeved on the support cylinder 4. The outside of the rotating frame 5 is rotatably installed on the fixing frame 3. An adjusting seat 6 is slidably installed on the rotating frame 5. The sliding direction of the adjusting seat 6 is perpendicular to the axis of the support cylinder 4. A convex block is constructed on the adjusting seat 6. The welding head 2 is installed in the direction of the convex block facing the support cylinder 4, and the welding head 2 has a certain inclination angle to ensure that the welding head 2 can weld the circumferential seam between the valve body and the outer shell.

[0043] An adjusting mechanism 7 is installed on the fixing frame 3 and acts on the adjusting seat 6. By the adjusting mechanism 7, the distances between a plurality of adjusting seats 6 and the corresponding support cylinders 4 are synchronously adjusted, so as to adapt to the welding of valve bodies and outer shells with different outer diameters, improving the applicability of the device.

[0044] Among them, a plurality of rotating frames 5 are linked. When one of the rotating frames 5 rotates, the remaining rotating frames 5 rotate synchronously. That is to say, when only one power drives one of the rotating frames 5 to rotate, the remaining rotating frames 5 will rotate synchronously. First, the outer shell and the valve body are fixedly docked through a tooling fixture. Then, the operator holds the handle 1. According to the circumferential seam to be welded, the positions of the three adjusting seats 6 are synchronously adjusted through the adjusting mechanism 7, 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 cylinders 4 is completed through the valve bodies. Then, one of the rotating frames 5 is driven to rotate, and the remaining rotating frames 5 will also rotate synchronously, and then drive the welding heads 2 to rotate around the docking position of the outer shell and the valve body to complete the welding work between the valve body and the outer shell, realizing the simultaneous welding of the circumferential seams between a plurality of valve bodies and outer shells, which is beneficial to the assembly of small batches of positive pressure joints and conducive to the orderly progress of the entire R & D and testing work. Moreover, compared with manually driving the welding head 2 to rotate around the weld for welding, the position of the welding head 2 is more stable during the welding process, ensuring the welding quality.

[0045] Such as Figure 1 and Figure 11As shown, in some embodiments, the fixing bracket 3 is provided with mounting holes 8. A bearing 9 is sleeved outside the rotating bracket 5. The bearing 9 is connected in the mounting hole 8 through a flexible member 10. The outer peripheral side of the rotating bracket 5 is connected to the inner ring of the bearing 9, and 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. Through the flexible member 10, the bearing 9 can perform a certain degree of planar movement in the mounting hole 8. The flexible member 10 provides a certain support and limit for the bearing 9 to avoid excessive movement and serves the purpose of assisting in resetting. During the planar movement of the rotating bracket 5, the support cylinder 4 can be driven to move together. Considering some factors such as production processes, the proficiency of workers, and the accuracy of production equipment during the small-batch development of positive pressure connectors, the spacing between adjacent two positive pressure connectors is not consistent. For example, if there are three positive pressure connectors to be welded, then there are two spacings between the three positive pressure connectors, namely spacing A and spacing B. In fact, the spacing values between spacing A and spacing B are not necessarily the same. Then, the position of the corresponding welding head 2 also needs an adaptive adjustment. Since the outer diameter of the support cylinder 4 is smaller than the inner diameter of the valve body, the support cylinder 4 can be inserted into the corresponding valve body within a certain error range. When the support cylinder 4 is inserted into the valve body, the valve body serves the purpose of assisting in positioning the support cylinder 4. Then, correspondingly, the rotating bracket 5 will adaptively change its position under the positioning of the support cylinder 4. At this time, the influence brought by the tolerance can be overcome, ensuring that each group of welding heads 2 can be matched to a suitable welding position. For convenience, the adjustment of the position of the welding head 2 is unified. However, there may be deviations in the welding points of each welding head 2 on the positive pressure connector. Therefore, each single welding head 2 is adjusted within a small range to adapt to the tolerance, so as to meet the individual welding work of each positive pressure connector, improve the applicability, and ensure that multiple positive pressure connectors can be successfully welded.

[0046] Such as Figure 1 , Figure 3 , Figure 5 and Figure 6As shown, in some embodiments, synchronous pulleys 11 are sleeved on multiple rotary frames 5, and the multiple synchronous pulleys 11 are drivingly connected by a synchronous belt 12. The synchronous pulleys 11 and the synchronous belt 12 are belt pulleys and transmission belts in the prior art, or can be sprockets and chains. A tensioning block 13 is elastically and slidably installed in the fixed frame 3. A column rod 14 is formed on the tensioning block 13. Under the elastic abutting force of the tensioning block 13, the periphery of the column rod 14 abuts against the side surface of the synchronous belt 12, so that the synchronous belt 12 is kept taut. Specifically, a chute is formed on the fixed frame 3, and the tensioning block 13 is slidably installed in the chute. A shrapnel is installed between the tensioning block 13 and the chute for providing an abutting force to the tensioning block 13. Of course, the number of tensioning blocks 13 can be multiple. In this embodiment, the number of tensioning blocks 13 is two, and they are diagonally designed compared with the middle support cylinder 4, further preventing the belt from loosening. When the bearing 9 moves in the plane due to the action of the flexible member 10, since the synchronous pulley 11 is sleeved on the rotary frame 5, when the bearing 9 moves to drive the rotary frame 5 to move, the corresponding synchronous pulley 11 will also move accordingly. In order to prevent the synchronous belt 12 from loosening when the synchronous pulley 11 moves, under the elastic abutting force of the tensioning block 13, the column rod 14 always abuts against the side surface of the synchronous belt 12, thereby preventing the synchronous belt 12 from loosening, and ensuring that the multiple rotary frames 5 can rotate simultaneously.

[0047] As Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, in some embodiments, the adjusting mechanism 7 includes a sliding frame 15 movably sleeved on the rotary frame 5. A slider 27 is slidably installed on the sliding frame 15, and the slider 27 can perform a circular motion around the axis of the support cylinder 4. In this embodiment, an annular groove is formed on the sliding frame 15 around the axis of the support cylinder 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 adjusting seat 6. An adjusting component 17 for driving the multiple sliding frames 15 to move along the axis of the support cylinder 4 is installed on the fixed frame 3. That is to say, when the adjusting component 17 drives the sliding frame 15 to move, the movement of the sliding frame 15 will pull the slider 27 connected thereto to move. Since the linkage rod 16 is hinged to the slider 27, when the sliding frame 15 moves, the adjusting seat 6 will be pulled through the linkage rod 16. As the adjusting seat 6 moves on the rotary frame 5, the distance between the welding head 2 and the support cylinder 4 is changed, so as to adapt to the welding work of positive pressure joints of different sizes. Among them, the sliding frame 15 will not interfere with the rotation of the rotary frame 5. Therefore, the slider 27 can rotate in the annular groove, so as to meet the rotation requirement of the welding head.

[0048] As Figure 7 , Figure 8 , Figure 9 and Figure 13As shown, in some embodiments, sliding plates 18 are elastically and slidably mounted on the opposite sides of two adjacent sliding brackets 15. A connecting plate 19 is elastically and slidably connected between two adjacent sliding plates 18. The adjusting assembly 17 acts on one of the connecting plates 19. A first slot is formed on the sliding bracket 15. The sliding plate 18 is slidably disposed in the first slot, and a spring piece is installed between the first slot and the sliding plate 18. Second slots are formed on the opposite sides of the two sliding plates 18. Two ends of the connecting plate 19 are respectively inserted into the second slots, and a spring piece is installed between the second slot and the connecting plate 19. The adjusting assembly 17 acts on one of the connecting plates 19. The remaining connecting plates 19 are all provided with guiding holes. A guiding rod slidably inserted through the guiding holes is installed on the fixing bracket 3. A wide slot ( Figure 13 which can be observed) is formed on the fixing bracket 3. The part of the sliding bracket 15 passing through the wide slot is located inside the fixing bracket 3. A gap is left between the wide slot and the sliding bracket 15. In this way, when the rotating bracket 5 moves in the plane due to the bearing 9, at this time, the sliding bracket 15 has a certain plane movement ability under the action of the sliding plate 18 and the connecting plate 19. 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 bracket 15 to move. And it can also move back to its original position under the action of the spring piece. On the premise of ensuring that the positions of multiple adjusting seats 6 can be adjusted synchronously, it does not affect the normal rotation of the rotating bracket 5.

[0049] As Figure 3 and Figure 12 shown, in some embodiments, a plurality of through slots 20 are formed on the circumferential side of the end of the support cylinder 4. The device further includes a plurality of support rods 21 rotatably mounted at one end inside the support cylinder 4. A spreading member 22 acting on the plurality of support rods 21 is installed on the fixing bracket 3. By means of the spreading member 22, the free ends of the plurality of support rods 21 can pass through the through slots 20 synchronously or be received into the through slots 20. The diameter of the support cylinder 4 is smaller than the inner diameter of the valve body. When the plurality of support cylinders 4 are respectively inserted into the corresponding valve bodies, at this time, the spreading member 22 can make the plurality of support rods 21 located inside the support cylinder 4 rotate simultaneously, so as to pass through the through slots 20 and abut against the inner wall of the valve body. After the plurality of support rods 21 abut against the inner wall of the valve body, it will force the support cylinder 4 to be coaxial with the corresponding valve body. After the support rods 21 abut against the inner wall of the valve body, it will force the rotating bracket 5 to move to be coaxial with the valve body. Since the sliding bracket 15 is movably sleeved on the rotating bracket 5, so at this time, the sliding bracket 15 will also be adjusted synchronously in position. In this way, it is ensured that when the rotating bracket 5 rotates, the welding head 2 makes a circular motion around the axis of the valve body, ensuring that the weld positions between each valve body and the housing can be welded.

[0050] As Figure 7 、 Figure 10 and Figure 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. Figure 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.

[0051] like Figure 2 , Figure 3 and Figure 7As shown, in some embodiments, the present application discloses a method of manually driving the movement of the moving frame 2203. A rotatable mounting rod 23 in the shape of an "n" is rotatably mounted on the handle 1. A forcing rod 24 is constructed on the rotatable mounting rod 23 near its axis of rotation. An activity slot 25 is formed in the moving frame 2203. The forcing rod 24 slides tangentially within the activity slot 25. Thus, when the rotatable mounting rod 23 is rotated, relative to the moving frame 2203, the forcing rod 24 moves within the activity slot 25, thereby forcing the moving frame 2203 to displace. Using the lever principle makes it more convenient to move the moving frame 2203. An elastic telescopic rod 26 is installed between the moving frame 2203 and the fixed frame 3. After welding is completed, releasing the rotatable mounting rod 23 allows the moving frame 2203 to move back to its original position, ensuring that the multiple support rods 21 can move back into the support cylinder 4. The elastic telescopic rod 26 includes a sleeve and a rod slidably inserted into the sleeve. A spring is installed between the sleeve and the rod. One end of the sleeve is connected to the outside of the fixed frame 3, and one end of the rod is connected to the moving frame 2203 located outside the fixed frame 3.

[0052] As Figure 11 As shown, in some embodiments, the flexible member 10 is annular and made of silicone material, with a hardness between Shore A85 and 100, a thickness between 2 cm and 4 cm, and an inner diameter to outer diameter ratio of 1:2. According to the parameters, the flexible member 10 is made of silicone material but has a certain load-bearing capacity. When the rotatable mounting rod 23 is not manually pulled, the bearing 9 and the mounting hole 8 remain in a relatively balanced state. After the bearing 9 undergoes a slight offset, the bearing 9 can also be reset through the elastic deformation characteristics of the flexible member 10 after the moving frame 2203 moves back to its original position.

[0053] As Figure 3 As shown, in some embodiments, the adjustment assembly 17 includes an adjustment screw rod 1701 vertically and rotatably mounted on the fixed frame 3. One end of the adjustment screw rod 1701 is located outside the fixed frame 3. One of the connecting plates 19 is threadedly sleeved on the adjustment screw rod 1701. A pointer 1702 located outside the fixed frame 3 is constructed on one of the connecting plates 19. A scale 1703 is provided outside the fixed frame 3. The design of the adjustment screw rod 1701 enables the staff to intuitively know the distance the welding head 2 moves in cooperation with the scale 1703 and the pointer 1702, facilitating quickly moving the welding head 2 to the corresponding position when performing circumferential welding on valve bodies of different diameters subsequently.

[0054] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those 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. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An ultrasonic welding device for a positive pressure joint, 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); Wherein, the plurality of rotating frames (5) are linked to each other, and when one of the rotating frames (5) rotates, the remaining rotating frames (5) rotate synchronously; 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 allowed 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); 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); 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).

2. The ultrasonic welding device for a 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.

3. The ultrasonic welding device for a positive pressure joint according to claim 1, wherein 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).

4. The ultrasonic welding device for a positive pressure connector according to claim 3, wherein, 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).

5. The ultrasonic welding device for a positive pressure joint according to claim 4, 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).

6. The ultrasonic welding device for a positive pressure joint according to claim 1, wherein, 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.

7. The ultrasonic welding device for a positive pressure joint according to claim 1, 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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