A heat sealing caliper

Abstract

The utility model provides a kind of hot sealing calipers, including frame, caliper cap, driving mechanism, load matching circuit and inductive electrode (movable hot sealing rod, fixed hot sealing rod). Caliper cap is installed on frame, and the front of caliper cap is equipped with gap for the insertion of external catheter. The length direction of fixed hot sealing rod and movable hot sealing rod is perpendicular to the front plane of caliper cap, and the hot sealing end of fixed hot sealing rod and the hot sealing end of movable hot sealing rod are oppositely arranged in caliper cap and form hot sealing groove for the placement of external catheter between them, and external catheter can fall into hot sealing groove through gap. Driving mechanism is drivingly connected with movable hot sealing rod, and driving mechanism is used to drive movable hot sealing rod to approach or move away from fixed hot sealing rod. Load matching circuit is connected to movable hot sealing rod for emitting high-frequency electric field to complete the heat sealing of external catheter. The need of catheter front being clamped into hot sealing calipers is realized, the problem of mutual conflict of user when arranging catheter in blood component preparation instrument is solved, and the user is facilitated to operate.

Description

Technical Field

[0001] This utility model relates to the field of blood bag sealing technology, and more specifically, to a heat-sealing clamp. Background Technology

[0002] Hospitals and blood banks use specialized plastic bags to store blood during collection. These bags are connected to PVC tubing, through which blood enters and exits the bag. Once blood is inside the bag, the tubing needs to be sealed with heat-sealing clamps to prevent contamination. In existing technology, the heat-sealing clamps have a notch on the side for inserting the tubing. After the tubing is inserted through the notch, it is secured in a heat-sealing device. However, the placement of the heat-sealing clamps on the equipment requires sufficient hand space, and the side-entry method can be inconvenient in some situations. For example, in blood separators (blood component preparation instruments, patent application number CN202230400794.6), where there are many heat-sealing clamps concentrated in one area, if all clamps use side-opening designs, the insertion and removal of the tubing can interfere with each other, affecting the user experience. Utility Model Content

[0003] The purpose of this application is to overcome the shortcomings commonly found in the current market as mentioned in the background art above, and to provide a heat-sealing caliper.

[0004] The present application addresses the above problems through the following technical solutions.

[0005] This embodiment provides a heat-sealing caliper, including: Frame; Caliper cap, which is mounted on the frame, has a notch on the front for inserting an external guide tube; The fixed heat sealing rod and the movable heat sealing rod are both perpendicular to the front plane of the caliper cap in the length direction. The heat sealing ends of the fixed heat sealing rod and the movable heat sealing rod are set opposite to each other inside the caliper cap and form a heat sealing groove between them for placing an external conduit. The external conduit can fall into the heat sealing groove through the notch. A drive mechanism is connected to the movable heat sealing rod and is used to drive the movable heat sealing rod closer to or away from the fixed heat sealing rod. The load matching circuit is connected to the movable heat-sealing rod and is used to generate a high-frequency electric field to complete the heat sealing of the external conduit.

[0006] In some embodiments, the movable heat-sealing rod is driven to connect with the driving mechanism through a connecting structure, which includes an insulating rod and an insulating fixing block. The other end of the movable heat-sealing rod, away from its heat-sealing end, extends into the frame and is sleeved on the inner periphery of the first end of the insulating rod. The insulating fixing block is sleeved on the outer periphery of the first end of the insulating rod.

[0007] In some embodiments, the driving mechanism includes a push-pull electromagnet, a push rod, a linear guide pair, and a first return spring. The push-pull electromagnet is installed inside the frame, and its output shaft is fixedly connected to the push rod. An insulating fixing block is installed on the sliding block of the linear guide pair, the length direction of which is perpendicular to the length direction of the movable heat-sealing rod. The push rod is located on the side of the insulating fixing block and is used to push the insulating fixing block to move along the linear guide pair, thereby driving the movable heat-sealing rod to move closer to the fixed heat-sealing rod. The first return spring and the push rod are located on opposite sides of the insulating fixing block. One end of the first return spring is fixedly connected to the frame, and the other end of the first return spring abuts against the insulating fixing block.

[0008] In some embodiments, the heat sealing caliper also includes a plunger, one end of which is fixedly mounted to the frame, and the other end of which abuts against the second end of the insulating rod as the movable heat sealing rod approaches the fixed heat sealing rod.

[0009] In some embodiments, the plunger includes a plunger body, a second return spring, a plunger head, and a grating screw. The plunger body has threads on its outer periphery and is fixed to the frame by the threads. The plunger body has an inner cavity, and the second return spring is located in the inner cavity. The grating screw is installed at one end of the plunger body and abuts against one end of the second return spring. The plunger head is slidably installed at the other end of the plunger body and abuts against the other end of the second return spring. The plunger head abuts against the second end of the insulating rod as the movable heat sealing rod approaches the fixed heat sealing rod.

[0010] In some embodiments, a first heat-sealing base is installed on the frame, and a fixed heat-sealing rod is fixedly installed on the first heat-sealing base. The first heat-sealing base and the frame have conductive properties.

[0011] In some embodiments, a second heat-sealing base is installed on the frame, and the first heat-sealing base and the second heat-sealing base are respectively located on both sides of the heat-sealing groove, with a fixed heat-sealing rod and a movable heat-sealing rod located between the first heat-sealing base and the second heat-sealing base.

[0012] In some embodiments, the heat-sealing clamp also includes a liquid detection module mounted on the first heat-sealing base and the second heat-sealing base for detecting the presence and / or type of liquid in the conduit.

[0013] In some embodiments, the liquid detection module includes a light-emitting plate and an insulating pad mounted on a first heat-sealing base, a light-receiving plate mounted on a second heat-sealing base, a light guide strip passing through the first heat-sealing base and the second heat-sealing base, and a light-transmitting hole provided on the insulating pad. The light emitted by the light-emitting plate passes sequentially through the light-transmitting hole, the light guide strip of the first heat-sealing base, the external conduit, and the light guide strip of the second heat-sealing base before being received by the light-receiving plate.

[0014] In some implementations, the load matching circuit includes a coaxial radio frequency line connected to an external high-frequency power supply, a high-voltage capacitor, and a wire-wound inductor wound around the outer periphery of an insulating rod and electrically connected to a movable heat-sealed rod.

[0015] In some embodiments, the heat-sealing caliper further includes a tube clamping mechanism, which includes a tube clamping base, a first tube clamping arm, a second tube clamping arm, and a reset member. The lower end of the first tube clamping arm is fixedly mounted on the tube clamping base or is an integral structure with the tube clamping base. The lower end of the second tube clamping arm is rotatably mounted on the tube clamping base. The first tube clamping arm and the second tube clamping arm are arranged opposite to each other, and a clamping slot is formed between the upper ends of the first tube clamping arm and the upper ends of the second tube clamping arm. The inner sidewalls of the middle ends of the first tube clamping arm and the middle ends of the second tube clamping arm are both recessed inward to form tube grooves. The two tube grooves enclose a tube clamping space, through which an external conduit can enter and exit the tube clamping space. A guide bearing is also rotatably mounted between the upper end and the middle end of the second tube clamping arm. The guide bearing protrudes toward the clamping slot and the tube clamping space. The rotation axis of the guide bearing is parallel to the length direction of the external conduit placed in the tube clamping space. The reset member is mounted on the tube clamping base or the first tube clamping arm and connected to the second tube clamping arm. The reset member ensures that the second tube clamping arm always tends to move closer to the first tube clamping arm. There are two sets of the first tube clamping arm, the second tube clamping arm, and the reset component. The two sets of the first tube clamping arm, the second tube clamping arm, and the reset component are arranged in parallel and spaced apart for common tube clamping. The first heat-sealing base is located between the two sets of first tube clamping arms, and the second heat-sealing base is located between the two sets of second tube clamping arms.

[0016] The beneficial effects of this application are: it enables the catheter to be inserted into the heat-sealing clamp from the front, solves the problem of conflicting catheters and difficulty in placing and removing them when the user is setting up the catheters in the blood component preparation instrument, and facilitates the user's operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the heat-sealing caliper of this application; Figure 2 for Figure 1 A schematic diagram of the disassembled structure of the heat-sealing caliper; Figure 3 for Figure 1 A schematic diagram of the structure for removing the caliper cap from a heat-sealed caliper; Figure 4 for Figure 1 A structural diagram of a portion of the heat-sealing caliper; Figure 5 for Figure 4 A cross-sectional view of this part of the heat-sealing caliper structure; Figure 6 for Figure 1 A cross-sectional view of the combination of the movable heat sealing rod, insulating rod, and winding inductor in the heat sealing caliper; Figure 7 for Figure 1 A schematic diagram of another part of the structure of the heat-sealing caliper; Figure 8 for Figure 1 A cross-sectional view of the plunger of a heat-sealed caliper; Figure 9 for Figure 1 A schematic diagram showing the disassembled structure of a portion of the heat-sealing caliper. Figure 10 for Figure 9 A cross-sectional view of the disassembled structure of the heat-sealing caliper part; Figure 11 for Figure 1 A schematic diagram of the tube clamping mechanism of the heat-sealing caliper. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In the description of the present utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "located in," and "connected" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in the present utility model can be understood according to the specific circumstances.

[0020] refer to Figure 1-7As shown, the heat-sealing caliper in the illustrated embodiment includes a frame 1, a caliper cap 2, a fixed heat-sealing rod 3 (i.e., a fixed sensing electrode), a movable heat-sealing rod 4 (i.e., a movable sensing electrode), a drive mechanism 5, and a load matching circuit (not shown in the figure). The caliper cap 2 is mounted on the frame 1, and the front of the caliper cap 2 has a notch 21 for inserting an external conduit. The length directions of both the fixed heat-sealing rod 3 and the movable heat-sealing rod 4 are perpendicular to the front plane of the caliper cap 2. Both the fixed heat-sealing rod 3 and the movable heat-sealing rod 4 have heat-sealing ends, which are arranged opposite each other inside the caliper cap 2, forming a heat-sealing groove for placing an external conduit. The external conduit can fall into the heat-sealing groove through the notch 21. The drive mechanism 5 is driven by the movable heat-sealing rod 4, and is used to drive the movable heat-sealing rod 4 closer to or away from the fixed heat-sealing rod 3. The load matching circuit is connected to the movable heat-sealing rod 4 and is used to emit a high-frequency electric field to complete the heat sealing of the external conduit. In use, the catheter is placed into the heat-sealing groove through the notch 21. The drive mechanism 5 pushes the movable heat-sealing rod 4 towards the fixed heat-sealing rod 3, melting the catheter clamped between the movable and fixed heat-sealing rods 4 and forming a heat-sealed seal. After heat sealing, the drive mechanism 5 pushes the movable heat-sealing rod 4 away from the fixed heat-sealing rod 3, and the movable heat-sealing rod 4 returns to its initial position for the next heat sealing operation. This embodiment fulfills the requirement of inserting the catheter into the heat-sealing clamp from the front, solving the problem of conflicting catheters and difficulty in placing and removing them when placing catheters in the blood component preparation instrument, thus facilitating user operation.

[0021] refer to Figure 5 , 6 As shown in the figure, the movable heat-sealing rod 4 in the illustrated embodiment is driven to be connected to the driving mechanism 5 through a connecting structure. The connecting structure includes an insulating rod 6 and an insulating fixing block 7. One end of the movable heat-sealing rod 4 is the heat-sealing end, and the other end extends into the frame 1 and is sleeved with the inner circumference of the first end of the insulating rod 6. The insulating fixing block 7 is sleeved on the outer circumference of the first end of the insulating rod 6.

[0022] refer to Figure 4 , 5As shown in Figure 7, the driving mechanism 5 in this embodiment includes a push-pull electromagnet 51, a push rod 52, a linear guide pair 53, and a first return spring 54. The push-pull electromagnet 51 is installed inside the frame 1, and its output shaft is fixedly connected to the push rod 52. An insulating fixing block 7 is installed on the sliding block of the linear guide pair 53 via an adapter plate 55. The length direction of the linear guide pair 53 is perpendicular to the length direction of the movable heat-sealing rod 4. The push rod 52 is located on the side of the insulating fixing block 7 and is used to push the insulating fixing block 7 to move along the linear guide pair 53. Specifically, after the push-pull electromagnet 51 is energized, its output shaft pushes out, driving the push rod 52 to move. The push rod 52 moves against the insulating fixing block 7, ultimately driving the movable heat-sealing rod 4 closer to the fixed heat-sealing rod 3. The first return spring 54 and the push rod 52 are located on opposite sides of the insulating fixing block 7. One end of the first return spring 54 is fixedly connected to the frame 1, and the other end of the first return spring 54 abuts against the insulating fixing block 7. When the push-pull electromagnet 51 is de-energized, the reset spring pushes the insulating fixing block 7 to reset. In other embodiments, the drive mechanism 5 may be an electric telescopic rod or a cylinder, etc., capable of driving the movable heat-sealing rod 4 to move away from or towards the fixed heat-sealing rod 3.

[0023] refer to Figure 2 , 3 As shown in Figure 8, the heat-sealing caliper in the illustrated embodiment also includes a plunger 8. One end of the plunger 8 is fixedly installed in the frame 1, and the other end of the plunger 8 abuts against the second end of the insulating rod 6 as the movable heat-sealing rod 4 approaches the fixed heat-sealing rod 3. Without the plunger 8, when the movable heat-sealing rod 4 presses against the guide tube, the heat-sealing end of the movable heat-sealing rod 4 is subjected to opposing forces from the guide tube and the fixed heat-sealing rod 3. At this time, the movable heat-sealing rod 4 deflects to a certain extent around the sliding block of the linear guide pair 53 as a fulcrum, increasing the parallelism error of the distance between the movable heat-sealing rod 4 and the fixed heat-sealing rod 3, thus affecting the heat-sealing effect. However, when the second end of the insulating rod 6 abuts against the plunger 8, the forces at both ends, with the sliding block of the linear guide pair 53 as a fulcrum, are relatively balanced, reducing the parallelism error of the distance between the movable heat-sealing rod 4 and the fixed heat-sealing rod 3. Specifically, the plunger 8 includes a plunger body 81, a second return spring 82, a plunger head 83, and a mortise screw 84. The plunger body 81 has threads on its outer circumference and is fixed to the frame 1 by the threads. The plunger body 81 has an inner cavity, and the second return spring 82 is located in the inner cavity. The mortise screw 84 is installed at one end of the plunger body 81 and abuts against one end of the second return spring 82. The plunger head 83 is slidably installed at the other end of the plunger body 81 and abuts against the other end of the second return spring 82. The plunger head 83 abuts against the second end of the insulating rod 6 when the movable heat-sealing rod 4 approaches the fixed heat-sealing rod 3. The force of the second return spring 82 can be adjusted by adjusting the locking depth of the mortise screw 84. The fixed position of the plunger 8 can be adjusted by rotating the plunger body 81.

[0024] refer to Figure 3 ,9 As shown in Figure 10, a first heat-sealing base 9 is installed on the frame 1 in the illustrated embodiment. A fixed heat-sealing rod 3 is fixedly installed on the first heat-sealing base 9, and the first heat-sealing base 9 and the frame 1 are electrically conductive. A second heat-sealing base 10 is installed on the frame 1. The first heat-sealing base 9 and the second heat-sealing base 10 are respectively located on both sides of the heat-sealing groove, and the fixed heat-sealing rod 3 and the movable heat-sealing rod 4 are located between the first heat-sealing base 9 and the second heat-sealing base 10. The upper end of the first heat-sealing base 9 facing the side of the second heat-sealing base 10 is a guide slope, and the upper end of the second heat-sealing base 10 facing the side of the first heat-sealing base 9 is a guide slope. This facilitates the insertion of the conduit. This embodiment also includes a liquid detection module 11 installed on the first heat-sealing base 9 and the second heat-sealing base 10, used to detect whether there is liquid and / or the type of liquid in the conduit. Specifically, the liquid detection module 11 includes a light-emitting plate 111 and an insulating pad 112 mounted on a first heat-sealing base 9, a light-receiving plate 113 mounted on a second heat-sealing base 10, a light guide strip 114 passing through the first heat-sealing base and a light guide strip 115 passing through the second heat-sealing base, and a light-transmitting hole on the insulating pad 112. The light emitted by the light-emitting plate 111 passes sequentially through the light-transmitting hole, the light guide strip 114 of the first heat-sealing base, the external conduit, and the light guide strip 115 of the second heat-sealing base before being received by the light-receiving plate 113. By detecting the light transmittance and wavelength, the presence and type of liquid in the conduit can be determined. When applied to a blood component preparation instrument, it can detect whether blood has passed through and whether it is red blood cells or plasma.

[0025] refer to Figure 6 As shown, the load matching circuit in this embodiment includes a coaxial radio frequency line connected to an external high-frequency power supply, a high-voltage capacitor, and a wire-wound inductor 14. The wire-wound inductor 14 is wound around the outer periphery of the insulating rod 6 and electrically connected to the movable heat-sealing rod 4 via a screw 12. The screw 12 has conductive properties and fixes the movable heat-sealing rod 4 to the inner periphery of the first end of the insulating rod 6. The load matching circuit matches the output impedance of the external high-frequency power supply to ensure efficient energy transfer to the movable heat-sealing rod 4. The high-frequency electric field causes molecular polarization in the plastic conduit, and the polarized molecules are forcibly aligned according to the direction of the electric field. The rapid change of the high-frequency electric field causes these molecules to change at an equally rapid speed, resulting in a large amount of heat generated by dielectric loss in the dielectric material. This heat accumulates and builds up to form a very high temperature, eventually melting the conduit.

[0026] refer to Figure 2 , 3As shown in Figure 11, this embodiment also includes a tube clamping mechanism 13, which includes a tube clamping base 131, a first tube clamping arm 132, a second tube clamping arm 133, and a reset member 134. The lower end of the first tube clamping arm 132 is fixedly installed on the tube clamping base 131 or is an integral structure with the tube clamping base 131. The lower end of the second tube clamping arm 133 is rotatably installed on the tube clamping base 131. The first tube clamping arm 132 and the second tube clamping arm 133 are arranged opposite to each other. A clamping slot is formed between the upper ends of the first tube clamping arm 132 and the upper ends of the second tube clamping arm 133. The inner sidewalls of the middle ends of the first tube clamping arm 132 and the middle ends of the second tube clamping arm 133 are both recessed inward to form tube grooves. The two tube grooves enclose a tube clamping space, through which an external conduit can enter and exit the tube clamping space. A guide bearing 135 is rotatably mounted between the upper and middle ends of the second tube clamping arm 133. The guide bearing 135 protrudes towards the clamping slot and the tube clamping space, and its rotation axis is parallel to the length direction of the external conduit placed in the tube clamping space. A reset member 134 is mounted on the tube clamping base 131 or the first tube clamping arm 132 and connected to the second tube clamping arm 133. The reset member 134 ensures that the second tube clamping arm 133 always tends to move closer to the first tube clamping arm 132. There are two sets of first tube clamping arms 132, second tube clamping arms 133, and reset members 134, which are arranged in parallel and spaced apart for joint tube clamping. A first heat-sealing base 9 is located between the two sets of first tube clamping arms 132, and a second heat-sealing base 10 is located between the two sets of second tube clamping arms 133. During operation, the catheter enters through the bayonet and is guided by the guide bearing 135 to more smoothly push open the second clamping arm 133 and fall into the clamping space. The reset member 134 presses the second clamping arm 133, and the catheter is clamped and secured in the clamping space. When removing the catheter, the catheter is guided by the guide bearing 135 to push open the second clamping arm 133 and disengage through the bayonet. The guide bearing 135 reduces the frictional resistance between the catheter and the first clamping arm 132 and the second clamping arm 133 during the process of entering the clamping space, realizing easy insertion and removal of the catheter.

[0027] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural modifications made based on the concept of this utility model and the description and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A heat seal caliper characterized by, include: Frame; A caliper cap, which is mounted on the frame, has a notch on its front for inserting an external conduit; A fixed heat sealing rod and a movable heat sealing rod are provided. The length direction of the fixed heat sealing rod and the movable heat sealing rod are both perpendicular to the front plane of the caliper cap. The heat sealing ends of the fixed heat sealing rod and the movable heat sealing rod are arranged opposite each other inside the caliper cap and form a heat sealing groove between them for placing an external conduit. The external conduit can fall into the heat sealing groove through the notch. A driving mechanism is connected to the movable heat sealing rod and is used to drive the movable heat sealing rod to move closer to or away from the fixed heat sealing rod. A load matching circuit, connected to the movable heat-sealing rod, is used to emit a high-frequency electric field to complete the heat sealing of the external conduit.

2. The heat-sealing caliper as described in claim 1, characterized in that, The movable heat-sealing rod is driven to connect with the driving mechanism through a connecting structure. The connecting structure includes an insulating rod and an insulating fixing block. The other end of the movable heat-sealing rod away from its heat-sealing end extends into the frame and is sleeved on the inner circumference of the first end of the insulating rod. The insulating fixing block is sleeved on the outer circumference of the first end of the insulating rod.

3. The hot bar of claim 2, wherein, The driving mechanism includes a push-pull electromagnet, a push rod, a linear guide pair, and a first return spring. The push-pull electromagnet is installed inside the frame, and its output shaft is fixedly connected to the push rod. The insulating fixing block is installed on the sliding block of the linear guide pair, and the length direction of the linear guide pair is perpendicular to the length direction of the movable heat-sealing rod. The push rod is located on the side of the insulating fixing block and is used to push the insulating fixing block to move along the linear guide pair, thereby driving the movable heat-sealing rod to move closer to the fixed heat-sealing rod. The first return spring and the push rod are located on opposite sides of the insulating fixing block. One end of the first return spring is fixedly connected to the frame, and the other end of the first return spring abuts against the insulating fixing block.

4. The hot bar of claim 3, wherein the first and second heating elements are arranged in a parallel configuration. It also includes a plunger, one end of which is fixedly installed in the frame, and the other end of which abuts against the second end of the insulating rod as the movable heat sealing rod approaches the fixed heat sealing rod.

5. The heat-sealing caliper as described in claim 4, characterized in that, The plunger includes a plunger body, a second return spring, a plunger head, and a grommet screw. The plunger body has threads on its outer periphery and is fixed to the frame through the threads. The plunger body has an inner cavity, and the second return spring is located in the inner cavity. The grommet screw is installed at one end of the plunger body and abuts against one end of the second return spring. The plunger head is slidably installed at the other end of the plunger body and abuts against the other end of the second return spring. The plunger head abuts against the second end of the insulating rod as the movable heat sealing rod approaches the fixed heat sealing rod.

6. The card hot lamination device of claim 1, wherein the card hot lamination device further comprises a card guide disposed between the first and second card hot lamination devices. A first heat-sealing base is installed on the frame, and a fixed heat-sealing rod is fixedly installed on the first heat-sealing base. The first heat-sealing base and the frame have conductive properties.

7. The hot bar of claim 6, wherein the first and second heating elements are arranged in a parallel configuration. A second heat-sealing base is installed on the frame. The first heat-sealing base and the second heat-sealing base are respectively located on both sides of the heat-sealing groove. The fixed heat-sealing rod and the movable heat-sealing rod are located between the first heat-sealing base and the second heat-sealing base.

8. The hot bar of claim 7, wherein the first and second heating elements are arranged in a parallel configuration. It also includes a liquid detection module installed on the first heat-sealing base and the second heat-sealing base, used to detect whether there is liquid and / or the type of liquid in the conduit.

9. The hot bar of claim 8, wherein the first and second heating elements are arranged in a parallel configuration. The liquid detection module includes a light-emitting plate and an insulating pad mounted on the first heat-sealing base, a light-receiving plate mounted on the second heat-sealing base, and a light guide strip passing through the first heat-sealing base and the second heat-sealing base. The insulating pad is provided with a light-transmitting hole. The light emitted by the light-emitting plate passes sequentially through the light-transmitting hole, the light guide strip of the first heat-sealing base, the external conduit, and the light guide strip of the second heat-sealing base before being received by the light-receiving plate.

10. The hot bar of claim 2 wherein, The load matching circuit includes a coaxial radio frequency line connected to an external high-frequency power supply, a high-voltage capacitor, and a wire-wound inductor. The wire-wound inductor is wound around the outer periphery of the insulating rod and electrically connected to the movable heat-sealing rod.

11. The hot bar of claim 7, wherein the first and second heating elements are formed of a material selected from the group consisting of: tungsten, molybdenum, rhenium, and combinations thereof. It also includes a tube clamping mechanism, which comprises a tube clamping base, a first tube clamping arm, a second tube clamping arm, and a reset component. The lower end of the first tube clamping arm is fixedly mounted on the tube clamping base or is integrally formed with the tube clamping base. The lower end of the second tube clamping arm is rotatably mounted on the tube clamping base. The first and second tube clamping arms are arranged opposite to each other, and a clamping slot is formed between the upper ends of the first and second tube clamping arms. The inner sidewalls of the middle ends of the first and second tube clamping arms are recessed inward to form tube grooves. The two tube grooves enclose a tube clamping space, through which an external conduit can enter and exit the tube clamping space. A guide bearing is rotatably mounted between the upper and middle ends of the second tube clamping arm. The guide bearing protrudes toward the clamping slot and the tube clamping space. The rotation axis of the guide bearing is parallel to the length direction of the external conduit placed in the tube clamping space. The reset component is mounted on the tube clamping base or the first tube clamping arm and connected to the second tube clamping arm. The reset component ensures that the second tube clamping arm always tends to move closer to the first tube clamping arm. The number of the first tube clamping arm, the second tube clamping arm, and the reset component are two sets, and the two sets of the first tube clamping arm, the second tube clamping arm, and the reset component are arranged in parallel and spaced apart for common tube clamping; The first heat-sealing base is located between the two sets of the first tube clamping arms, and the second heat-sealing base is located between the two sets of the second tube clamping arms.

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