A welding defect detection device for air conditioning refrigeration copper pipes

Abstract

The present invention relates to the field of weld detection, and in particular to a welding defect detection device for air-conditioning refrigeration copper tubes, comprising a base, positioning components symmetrically arranged on both sides of the upper end of the base, the positioning component comprising a shell with a central through hole, a copper tube to be tested is horizontally penetrated between the central through holes of the shell, a fixed beam is fixedly arranged between the top ends of the shell, fixed ring frames are fixedly arranged at both ends of the bottom of the fixed beam, movable ring frames are rotatably installed in the fixed ring frames, and the two movable ring frames are fixedly connected by mounting plates, the number of mounting plates is four groups and is distributed in a cross shape, a pressure component is arranged on the mounting plate at the top, and a detection component is arranged on the mounting plate at the bottom. The present invention uses a pressure component to gradually apply stress load to the weld position of the copper tube to be tested, and cooperates with the detection component to monitor the deformation process of the weld joint in real time, so as to realize circumferential dynamic detection of the bending strength of the weld position of the copper tube to be tested.

Description

Technical Field

[0001] The invention relates to the technical field of weld detection, and in particular to a welding defect detection device for air-conditioning refrigeration copper pipes. Background Art

[0002] In the air conditioning refrigeration system, copper pipes are responsible for transporting refrigerant from the compressor to the condenser, expansion valve and evaporator to complete the refrigeration cycle. Air conditioning refrigeration copper pipes are generally made of red copper (also known as red copper), which has good thermal conductivity, corrosion resistance and pressure resistance. It is a vital component of the air conditioning refrigeration system. It carries the circulation of refrigerant and plays a key role in ensuring the refrigeration effect of air conditioning.

[0003] During the processing of air-conditioning refrigeration copper tubes, defect detection at the welding position of the copper tubes is an important part of ensuring the normal operation of the refrigeration system and avoiding potential leakage risks. At present, defect detection of refrigeration copper tubes is mainly achieved through appearance inspection, using the naked eye or visual inspection system to observe whether there are defects such as bubbles, cracks, inclusions, etc. on the surface of the weld. This detection method is simple and easy, but it can only realize the static detection process of the copper tube weld position, and cannot detect whether there are defects in the connection strength of the copper tube weld, so the detection effect is limited. Summary of the invention

[0004] The purpose of the present invention is to provide a device for detecting welding defects of air-conditioning refrigeration copper tubes, aiming to solve the above-mentioned technical problems.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A device for detecting welding defects of copper tubes for air conditioning and refrigeration, comprising a base, positioning components are symmetrically arranged on both sides of the upper end of the base, the positioning component comprises a shell with a central through hole, a copper tube to be tested is horizontally penetrated between the central through holes of the shell, a fixed crossbeam is fixedly arranged between the top ends of the shell, fixed ring frames are fixedly arranged at both ends of the bottom of the fixed crossbeam, movable ring frames are rotatably installed in the fixed ring frames, two movable ring frames are fixedly connected by mounting plates, the mounting plates are four groups in number and are distributed in a cross shape, a pressure component is arranged on the mounting plate at the top end, a detection component is arranged on the mounting plate at the bottom end, cameras and laser detectors are fixedly arranged on the mounting plates at the left and right ends respectively, and the weld position of the copper tube to be tested is between the pressure component and the detection component and the camera and the laser detector.

[0007] The pressure assembly includes a bidirectional screw, both ends of the bidirectional screw are rotatably mounted in a rotating seat on the mounting plate, the bidirectional screw is driven by a rotating motor, threads on the threaded sections at both ends of the bidirectional screw are penetrated by sliding seats, the sliding seats are slidably mounted in a slide groove on the mounting plate, the bottom of the sliding seat is rotatably matched with one end of the connecting rod, and the other end of the connecting rod is rotatably matched with the side wall of the slide cylinder, a fixed shaft rod is slidably penetrated in the interior of the slide cylinder along the axial direction, the top end of the fixed shaft rod is fixedly connected to the mounting plate, a buffer spring is arranged between the bottom end of the fixed shaft rod and the slide cylinder, a punch head is fixedly arranged at the bottom of the slide cylinder, and the punch head is aligned with the weld connection of the copper tube to be tested.

[0008] The laser detector cooperates with the camera to perform circumferential static detection on the weld position of the copper tube to be tested, and the detection component cooperates with the pressure component to perform circumferential dynamic detection on the weld position of the copper tube to be tested.

[0009] As a further solution of the present invention: an inner tooth groove is arranged on the inner wall of the fixed ring frame, and limiting sliding grooves are arranged in an annular direction on both sides of the fixed ring frame.

[0010] As a further solution of the present invention: a plurality of creeping gears are installed in the movable ring frame for uniform rotation, the creeping gears are meshed with the internal tooth grooves, a creeping motor is fixedly provided on one side of the movable ring frame, the output end of the creeping motor is connected to one group of creeping gears, and limiting pulleys are rotatably installed on both sides of the movable ring frame, and the limiting pulleys are slidably installed in corresponding limiting grooves.

[0011] As a further solution of the present invention: the detection assembly includes a detection cylinder, which is fixedly arranged on a mounting plate, a sliding rod is axially slidably installed on the top of the detection cylinder, the top of the sliding rod passes through the detection cylinder and is connected to a detection ball, the detection ball rests on the weld connection of the copper tube to be tested, a baffle is fixedly arranged on the bottom end of the sliding rod, a return spring is arranged between the baffle and the bottom of the detection cylinder, an induction pad is extended downward from the bottom of the baffle, a photoelectric sensor is fixedly arranged on the bottom of the detection cylinder, and the induction pad is arranged opposite to the photoelectric sensor.

[0012] As a further solution of the present invention: the positioning assembly also includes a positioning motor, the positioning motor is fixedly arranged on one side of the outer shell, the output end of the positioning motor is connected to a positioning gear, a clamping gear is rotatably installed inside the outer shell, the positioning gear is meshed with the clamping gear, a plurality of groups of radial grooves are evenly arranged inside the outer shell, a radial slider is slidably installed in each group of the radial grooves, the tail end of the radial slider is connected to the radial groove through a reset spring, and the head end of the radial slider passes through the outer shell and is fixedly connected to a clamping head.

[0013] As a further solution of the present invention: a plurality of groups of arc grooves are evenly arranged on the clamping gear, and a sliding pin is fixedly arranged on each group of the radial sliding blocks, and the sliding pin is adapted to be slidably installed in the corresponding arc groove.

[0014] Beneficial effects of the present invention:

[0015] (1) By setting a fixed ring frame and a movable ring frame, during the detection process, the copper tube to be tested passes through the positioning components at both ends, and the positioning components are used to clamp and position the two ends of the copper tube to be tested to maintain the stability of the detection process. During the detection, the movable ring frame rotates circumferentially with the axis of the copper tube to be tested as the central axis. During this process, the laser detector will cooperate with the camera to perform laser ranging and visual inspection on the weld of the copper tube to be tested, thereby realizing a static detection process of the welding position of the copper tube to be tested. At the same time, the pressure component will gradually apply stress load to the weld position of the copper tube to be tested, and cooperate with the detection component to monitor the deformation process of the weld joint in real time, thereby realizing a circumferential dynamic detection of the bending strength of the weld position of the copper tube to be tested, thereby realizing a comprehensive detection process of the welding position of the copper tube to be tested.

[0016] (2) By setting up the detection component, when the pressure component gradually applies stress load to the welding connection of the copper tube to be tested, the copper tube to be tested will gradually bend and deform at the weld. During this process, the detection ball always rests on the weld position and gradually pushes the slide bar downward as the copper tube to be tested bends. The slide bar will push the baffle plate downward. At this time, the baffle plate will force the return spring to compress and deform, and drive the sensing pad to move synchronously. The photoelectric sensor can be used to monitor the displacement distance change of the sensing pad in real time, so that the bending degree of the copper tube to be tested can be intuitively fed back according to the monitored displacement physical quantity, and then the welding connection strength of the copper tube to be tested can be analyzed and judged whether there is a defect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the positioning component in the present invention.

[0020] Figure 3 It is a schematic diagram of the internal structure of the shell in the present invention.

[0021] Figure 4 It is a structural schematic diagram of the fixed ring frame in the present invention.

[0022] Figure 5 It is a structural schematic diagram of the movable ring frame in the present invention.

[0023] Figure 6 It is a schematic diagram of the structure of the pressure component in the present invention.

[0024] Figure 7 It is a structural schematic diagram of the camera and the laser detector in the present invention.

[0025] Figure 8 yes Figure 7 A schematic diagram of the enlarged structure at point A in the middle.

[0026] In the figure: 1, base; 2, positioning assembly; 201, housing; 202, positioning motor; 203, positioning gear; 204, radial slide; 205, reset spring; 206, radial slider; 2061, slide pin; 207, clamping head; 208, clamping gear; 2081, arc groove; 3, copper tube to be tested; 4, fixed crossbeam; 5, fixed ring frame; 501, inner tooth groove; 502, limit slide; 6, movable ring frame; 601, creeping motor; 602, creeping gear Wheel; 603, limit pulley; 604, mounting plate; 7, pressure assembly; 701, bidirectional screw; 702, sliding seat; 703, connecting rod; 704, slide cylinder; 705, fixed shaft; 706, buffer spring; 707, punch head; 8, detection assembly; 801, detection cylinder; 802, slide rod; 803, detection ball; 804, baffle; 805, return spring; 806, induction pad; 807, photoelectric sensor; 9, camera; 10, laser detector. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1 , Figure 5 and Figure 7As shown, the present invention is a welding defect detection device for air-conditioning refrigeration copper tubes, comprising a base 1, positioning components 2 are symmetrically arranged on both sides of the upper end of the base 1, the positioning component 2 comprises a shell 201 with a central through hole, a copper tube 3 to be tested is horizontally penetrated between the central through hole of the shell 201, a fixed beam 4 is fixedly arranged between the top ends of the shell 201, fixed ring frames 5 are fixedly arranged at both ends of the bottom of the fixed beam 4, and movable ring frames 6 are rotatably installed in the fixed ring frames 5, and the two movable ring frames 6 are fixedly connected by mounting plates 604, and the mounting plates 604 have four groups and are distributed in a cross shape, a pressure component 7 is arranged on the mounting plate 604 at the top, a detection component 8 is arranged on the mounting plate 604 at the bottom, and cameras 9 and laser detectors 10 are fixedly arranged on the mounting plates 604 at the left and right ends, respectively, and the weld position of the copper tube 3 to be tested is between the pressure component 7 and the detection component 8 and the camera 9 and the laser detector 10.

[0029] The laser detector 10 cooperates with the camera 9 to perform circumferential static detection on the weld position of the copper tube 3 to be tested, and the detection component 8 cooperates with the pressure component 7 to perform circumferential dynamic detection on the weld position of the copper tube 3 to be tested.

[0030] Specifically, by setting a fixed ring frame 5 and a movable ring frame 6, during the detection process, the copper tube 3 to be tested passes through the positioning components 2 at both ends, and the positioning components 2 are used to clamp and position the two ends of the copper tube 3 to be tested, so as to maintain the stability of the detection process. During the detection, the movable ring frame 6 rotates circumferentially with the axis of the copper tube 3 to be tested as the central axis. During this process, the laser detector 10 will cooperate with the camera 9 to perform laser ranging and visual inspection on the weld of the copper tube 3 to be tested, so as to realize the static detection process of the welding position of the copper tube 3 to be tested. At the same time, the pressure component 7 will gradually apply stress load to the weld position of the copper tube 3 to be tested, and cooperate with the detection component 8 to monitor the deformation process of the weld connection in real time, so as to realize the circumferential dynamic detection of the bending strength of the weld position of the copper tube 3 to be tested, and then realize the comprehensive detection process of the welding position of the copper tube 3 to be tested.

[0031] like Figure 6As shown, the pressure assembly 7 includes a bidirectional screw 701, both ends of which are rotatably mounted in a rotating seat on the mounting plate 604, the bidirectional screw 701 is driven by a rotating motor, and the threaded sections at both ends of the bidirectional screw 701 are threadedly penetrated with sliding seats 702, and the sliding seats 702 are slidably mounted in the slide grooves on the mounting plate 604, the bottom of the sliding seat 702 is rotatably matched with one end of the connecting rod 703, and the other end of the connecting rod 703 is rotatably matched with the side wall of the slide cylinder 704, and a fixed shaft rod 705 is slidably penetrated in the interior of the slide cylinder 704 along the axial direction, the top end of the fixed shaft rod 705 is fixedly connected to the mounting plate 604, a buffer spring 706 is arranged between the bottom end of the fixed shaft rod 705 and the slide cylinder 704, and a punch head 707 is fixedly arranged at the bottom of the slide cylinder 704, and the punch head 707 is aligned with the weld connection of the copper tube 3 to be tested.

[0032] Specifically, by setting the pressure component 7, when the impact test is performed on the welding position of the copper tube 3 to be tested, the rotating motor drives the bidirectional screw 701 to rotate, and the bidirectional screw 701 will drive the sliding seats 702 at both ends to move toward each other. During the linear movement, the sliding seat 702 will drive the slide cylinder 704 to move downward along the fixed shaft 705 through the connecting rod 703, thereby driving the punch head 707 to apply a stress load to the weld of the copper tube 3 to be tested. As the punch head 707 gradually moves downward, the punching strength applied by the punch head 707 becomes greater and greater, so that the connection strength of the welding joint of the copper tube 3 to be tested can be judged according to the degree of bending deformation at the weld of the copper tube 3 to be tested.

[0033] like Figure 4 As shown, an inner tooth groove 501 is provided on the inner wall of the fixed ring frame 5 , and limiting sliding grooves 502 are circumferentially provided on both sides of the fixed ring frame 5 .

[0034] like Figure 5 As shown, a number of creeping gears 602 are evenly installed in the movable ring frame 6 for rotation, and the creeping gears 602 are meshed with the internal tooth grooves 501. A creeping motor 601 is fixedly provided on one side of the movable ring frame 6, and the output end of the creeping motor 601 is connected to one group of creeping gears 602. Limiting pulleys 603 are rotatably installed on both sides of the movable ring frame 6, and the limiting pulleys 603 are slidably installed in the corresponding limiting grooves 502.

[0035] Specifically, by setting up the movable ring frame 6, during the circumferential detection process, the creeping motor 601 will drive the creeping gear 602 to rotate, and the creeping gear 602 will creep and rotate along the inner tooth groove 501, thereby driving the movable ring frame 6 to realize self-rotation in the fixed ring frame 5. During this process, the limiting pulley 603 will always keep sliding in the limiting slide groove 502, which can effectively improve the balance and stability of the movable ring frame 6 during the self-rotation process.

[0036] like Figure 8As shown, the detection component 8 includes a detection tube 801, which is fixedly arranged on the mounting plate 604. A slide rod 802 is axially slidably installed on the top of the detection tube 801. The top of the slide rod 802 passes through the detection tube 801 and is connected to a detection ball 803. The detection ball 803 abuts against the weld connection of the copper tube 3 to be tested. A baffle 804 is fixedly arranged at the bottom of the slide rod 802. A return spring 805 is arranged between the baffle 804 and the bottom of the detection tube 801. An induction pad 806 is extended downward from the bottom of the baffle 804. A photoelectric sensor 807 is fixedly arranged at the bottom of the detection tube 801, and the induction pad 806 is arranged opposite to the photoelectric sensor 807.

[0037] Specifically, by setting up the detection component 8, when the pressure component 7 gradually applies stress load to the welding connection of the copper tube 3 to be tested, the copper tube 3 to be tested will gradually bend and deform at the weld. During this process, the detection ball 803 always rests on the weld position, and gradually pushes the slide bar 802 downward as the copper tube 3 to be tested bends. The slide bar 802 will push the baffle 804 downward. At this time, the baffle 804 will force the return spring 805 to undergo compression deformation, and drive the sensing pad 806 to move synchronously. The photoelectric sensor 807 can be used to monitor the displacement distance change of the sensing pad 806 in real time, so that the bending degree of the copper tube 3 to be tested can be intuitively fed back according to the monitored displacement physical quantity, and then it can be analyzed and determined whether there are defects in the welding connection strength of the copper tube 3 to be tested.

[0038] like Figure 2 As shown, the positioning assembly 2 also includes a positioning motor 202, which is fixedly arranged on one side of the shell 201, and the output end of the positioning motor 202 is connected to a positioning gear 203. A clamping gear 208 is rotatably installed inside the shell 201, and the positioning gear 203 is meshed with the clamping gear 208. A plurality of groups of radial grooves 204 are evenly arranged inside the shell 201, and a radial slider 206 is slidably installed in each group of radial grooves 204. The rear end of the radial slider 206 is connected to the radial groove 204 through a reset spring 205, and the front end of the radial slider 206 passes through the shell 201 and is fixedly connected to a clamping head 207.

[0039] like Figure 3 As shown, a plurality of groups of arc grooves 2081 are evenly arranged on the clamping gear 208 , and a sliding pin 2061 is fixedly arranged on each group of radial sliders 206 , and the sliding pin 2061 is adapted to be slidably installed in the corresponding arc groove 2081 .

[0040] Specifically, by setting the positioning component 2, during detection, the two ends of the copper tube 3 to be tested are inserted into the central through hole of the shell 201, and the positioning motor 202 drives the positioning gear 203 to rotate, and the positioning gear 203 will drive the clamping gear 208 to rotate. During the rotation process, the clamping gear 208 will utilize the sliding cooperation between the arc groove 2081 and the sliding pin 2061 to make multiple groups of radial sliders 206 realize synchronous radial sliding along the radial slide groove 204 until multiple groups of clamping heads 207 contact and clamp against the two ends of the copper tube, so that the two ends of the copper tube 3 to be tested can be centered and clamped, ensuring that the copper tube 3 to be tested remains horizontal and stable during the detection process, which is beneficial to the detection process.

[0041] The working principle of the present invention is as follows: Figure 1-Figure 8 As shown, when in use, the two ends of the copper tube 3 to be tested are inserted into the central through hole of the housing 201, and the positioning motor 202 drives the positioning gear 203 to rotate, and the positioning gear 203 drives the clamping gear 208 to rotate. During the rotation process, the clamping gear 208 will use the sliding cooperation between the arc groove 2081 and the sliding pin 2061 to make multiple groups of radial sliders 206 realize synchronous radial sliding along the radial slide groove 204, until multiple groups of clamping heads 207 contact and clamp against the two ends of the copper tube, so that the two ends of the copper tube 3 to be tested can be clamped in the center. During the circumferential detection process, the creeping motor 601 will drive the creeping gear 602 to rotate, and the creeping gear 602 will creep and rotate along the inner tooth groove 501, thereby driving the movable ring frame 6 to realize self-rotation in the fixed ring frame 5. During this process, the laser detector 10 will cooperate with the camera 9 to perform laser ranging and visual inspection on the weld of the copper tube 3 to be tested, thereby realizing a static detection process of the welding position of the copper tube 3 to be tested. At the same time, the pressure component 7 will gradually apply stress load to the weld position of the copper tube 3 to be tested, and cooperate with the detection component 8 to monitor the deformation process of the weld connection in real time, thereby realizing circumferential dynamic detection of the bending strength of the weld position of the copper tube 3 to be tested, and further realizing a comprehensive detection process of the welding position of the copper tube 3 to be tested.

[0042] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An air conditioning refrigeration copper tube welding defect detection device, comprising a base (1), characterized in that: Positioning components (2) are symmetrically arranged on both sides of the upper end of the base (1), and the positioning component (2) comprises a shell (201) having a central through hole, and a copper tube (3) to be tested is horizontally passed through the central through hole of the shell (201), and a fixed beam (4) is fixedly arranged between the top ends of the shell (201), and fixed ring frames (5) are fixedly arranged at both ends of the bottom of the fixed beam (4), and movable ring frames (6) are rotatably installed in the fixed ring frames (5), and a mounting plate is connected between the two movable ring frames (6). (604) are fixedly connected, the number of the mounting plates (604) is four and they are arranged in a cross shape, the mounting plate (604) at the top is provided with a pressure assembly (7), the mounting plate (604) at the bottom is provided with a detection assembly (8), the mounting plates (604) at the left and right ends are respectively fixedly provided with a camera (9) and a laser detector (10), and the weld position of the copper tube (3) to be tested is located between the pressure assembly (7) and the detection assembly (8) and the camera (9) and the laser detector (10); The pressure assembly (7) comprises a bidirectional screw (701), both ends of which are rotatably mounted in a rotating seat on a mounting plate (604), the bidirectional screw (701) being driven by a rotating motor, and a sliding seat (702) being provided through the threaded sections at both ends of the bidirectional screw (701), the sliding seat (702) being slidably mounted in a slide groove on the mounting plate (604), the bottom of the sliding seat (702) being rotatably matched with one end of a connecting rod (703), the connecting rod ( The other end of the slide (703) is rotatably matched with the side wall of the slide (704), and a fixed shaft (705) is provided inside the slide (704) to slide and penetrate along the axial direction, and the top of the fixed shaft (705) is fixedly connected to the mounting plate (604), and a buffer spring (706) is provided between the bottom end of the fixed shaft (705) and the slide (704), and a punch head (707) is fixedly provided at the bottom of the slide (704), and the punch head (707) is aligned with the weld joint of the copper tube (3) to be tested; The laser detector (10) cooperates with the camera (9) to perform circumferential static detection on the weld position of the copper tube (3) to be detected, and the detection component (8) cooperates with the pressure component (7) to perform circumferential dynamic detection on the weld position of the copper tube (3) to be detected.

2. The device for detecting welding defects of air-conditioning refrigeration copper tubes according to claim 1 is characterized in that: An inner tooth groove (501) is provided on the inner wall of the fixed ring frame (5), and limiting sliding grooves (502) are provided in an annular direction on both sides of the fixed ring frame (5).

3. The device for detecting welding defects of air-conditioning refrigeration copper tubes according to claim 2 is characterized in that: A plurality of creeping gears (602) are evenly rotatably mounted in the movable ring frame (6), and the creeping gears (602) are meshed with the internal tooth grooves (501). A creeping motor (601) is fixedly mounted on one side of the movable ring frame (6), and the output end of the creeping motor (601) is connected to one group of creeping gears (602). Limiting pulleys (603) are rotatably mounted on both sides of the movable ring frame (6), and the limiting pulleys (603) are slidably mounted in corresponding limiting sliding grooves (502).

4. The device for detecting welding defects of air-conditioning refrigeration copper tubes according to claim 1 is characterized in that: The detection assembly (8) comprises a detection tube (801), wherein the detection tube (801) is fixedly arranged on a mounting plate (604), a slide rod (802) is axially slidably arranged on the top end of the detection tube (801), the top end of the slide rod (802) passes through the detection tube (801) and is connected to a detection ball (803), the detection ball (803) abuts against a weld joint of the copper tube (3) to be tested, a baffle (804) is fixedly arranged at the bottom end of the slide rod (802), a return spring (805) is arranged between the baffle (804) and the bottom of the detection tube (801), a sensing pad (806) is extended downward from the bottom of the baffle (804), a photoelectric sensor (807) is fixedly arranged at the bottom of the detection tube (801), and the sensing pad (806) is arranged directly opposite to the photoelectric sensor (807).

5. The device for detecting welding defects of air-conditioning refrigeration copper tubes according to claim 1 is characterized in that: The positioning assembly (2) further comprises a positioning motor (202), wherein the positioning motor (202) is fixedly arranged on one side of the housing (201), and the output end of the positioning motor (202) is connected to a positioning gear (203), and a clamping gear (208) is rotatably installed inside the housing (201), and the positioning gear (203) meshes with the clamping gear (208), and a plurality of groups of radial slide grooves (204) are evenly arranged inside the housing (201), and a radial slider (206) is slidably installed in each group of the radial slide grooves (204), and the rear end of the radial slider (206) is connected to the radial slide groove (204) via a return spring (205), and the front end of the radial slider (206) passes through the housing (201) and is fixedly connected to a clamping head (207).

6. The device for detecting welding defects of air-conditioning refrigeration copper tubes according to claim 5, characterized in that: The clamping gear (208) is evenly penetrated by a plurality of groups of arc grooves (2081), and each group of radial sliders (206) is fixedly provided with a sliding pin (2061), and the sliding pin (2061) is adapted to be slidably installed in the corresponding arc groove (2081).

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