An evaporator welded tube and an apparatus and method for assembling the same

Abstract

The application discloses an evaporator welded pipe and an assembling device and method thereof, which comprises a flange and a pipe fitting, the flange is provided with two openings, the inner side wall of each opening is provided with two convex points, the outer side wall of the pipe fitting is provided with two concave points, and the two convex points of the inner side wall of the opening and the two concave points of the outer side wall of the pipe fitting are tightly matched. Compared with the traditional welding device, the application has the advantages of small working stroke, short working time, no need of gas heating, no emission of harmful gases such as carbon dioxide, no thermal deformation, no need of shape correction, reduced labor cost, automatic intermittent single conveying of the flange to a specified position, and high processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of evaporator manufacturing technology, specifically to an evaporator welded tube, its assembly equipment, and its assembly method. Background Technology

[0002] In automotive air conditioning systems, the evaporator is an essential component. Evaporator welded pipes are an important part of the evaporator, typically used to connect various parts of the evaporator to ensure smooth refrigerant flow. Evaporator pipes consist of flanges and inlet / outlet pipes. The flange end connects to the expansion valve, and the other end is welded to the evaporator. The quality of the evaporator welded pipes and the welding process have a significant impact on the performance and reliability of the evaporator.

[0003] Patent No. CN202010316145.8 proposes a device for continuous welding of the external pipe of a blown evaporator. It has a rotary table that rotates in the horizontal direction. Along the rotation direction of the rotary table, there are a feeding station, a buffer station, a welding station, a cooling station, and a unloading station arranged in sequence on the side of the rotary table. The welding station is equipped with a high-frequency welding device, which can significantly improve the welding efficiency of the evaporator and the external pipe, and the welding quality of the evaporator and the external pipe is greatly improved. The yield of the evaporator is high and the welding quality is stable. However, the use of welding causes large temperature changes and serious deformation of the pipes. Each component needs to be reshaped to ensure the correct relative position of the inlet and outlet. Welding requires heating. Preheating and heating not only consume a lot of time, but also consume fuel gas and emit harmful gases such as carbon dioxide. The exhaust gas carries away most of the heat, making its efficiency very low.

[0004] Therefore, the present invention provides an evaporator welding tube, its assembly equipment, and its assembly method to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an evaporator welding tube, its assembly equipment, and its assembly method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An evaporator welded pipe includes a flange and a fitting. The flange has two openings, each with two protruding points on its inner sidewall and two recessed points on its outer sidewall. The two protruding points on the inner sidewall of the openings and the two recessed points on the outer sidewall of the fitting fit tightly together to prevent relative rotation and relative sliding between the fitting and the flange, thus achieving a tight fit.

[0008] An assembly device for welding evaporator tubes includes a frame, on which a mold is fixedly mounted. A flange is provided on the upper side of the mold. A clamping and positioning device is provided on the right side of the mold and is mounted on the upper side of the frame. Multiple force transmission and direction-changing devices are mounted on the upper side of the frame and are symmetrically arranged on the left and right sides of the mold. Each force transmission and direction-changing device includes a guide block, a force-directing block, a limiting frame, and a force transmission mechanism. The guide block is fixedly mounted on the upper side of the frame and has a guide groove. The force-directing block is fixedly mounted on the guide block. The limiting frame is fixedly mounted on the upper side of the force-directing block. The force transmission mechanism is mounted on the guide block. A limiting block is mounted on the frame and is in close contact with the front end of the flange.

[0009] As a further aspect of the present invention: the force transmission mechanism includes: a pushing force transmission component and a pressure block, the pushing force transmission component is slidably connected to the guide groove, the pressure block is slidably connected to the limiting frame, the angle between the pressure block and the frame is 25 degrees, and the end of the pressure block near the limiting frame is in close contact with the end of the pushing force transmission component near the guide groove.

[0010] As a further embodiment of the present invention: the fixture positioning device includes: a middle fixing fixture, a tail positioning fixture and a photoelectric switch. The middle fixing fixture is fixedly installed on the frame on the right side of the mold, the tail positioning fixture is fixedly installed on the frame on the right side of the middle fixing fixture, and the photoelectric switch is fixedly installed on the upper side of the tail positioning fixture. Pipes are provided on the middle fixing fixture and the tail positioning fixture.

[0011] As a further aspect of the present invention: multiple parallel force-sharing structures are installed on the upper side of the frame, and the parallel force-sharing structures are located at the end of the pushing force transmission component away from the guide groove.

[0012] As a further embodiment of the present invention: the parallel force-sharing structure includes: a fixed guide rail, a slider, a connecting rod, and force-sharing rods. The fixed guide rail is fixedly installed on the upper surface of the frame. The slider is slidably connected to the fixed guide rail. The connecting rod is fixedly installed at the end of the slider away from the guide groove. Multiple force-sharing rods are fixedly installed at the end of the slider away from the connecting rod. The end of each force-sharing rod away from the slider is fixedly connected to the end of the pushing force transmission component away from the guide groove.

[0013] As a further aspect of the present invention: each of the connecting rods is provided with a gas-liquid booster cylinder at the end away from the slider. The gas-liquid booster cylinder is fixedly installed on the upper side of the frame. The output end of the gas-liquid booster cylinder is fixedly installed at the end of the connecting rod away from the slider. A tension spring is slidably connected to the output end of the gas-liquid booster cylinder. One end of the tension spring is fixedly installed on the connecting rod, and the other end of the tension spring is fixedly installed on the gas-liquid booster cylinder.

[0014] As a further aspect of the present invention, an intermittent feeding device is installed on the upper side of the frame.

[0015] As a further embodiment of the present invention: the intermittent feeding device includes: a lower guide rail, a middle guide rail, a shaped frame, a stepper motor, and a cam. The lower guide rail is fixedly installed on the upper side of the frame, the middle guide rail is fixedly installed on the upper side of the lower guide rail, the shaped frame is slidably connected to the middle guide rail, the stepper motor is fixedly installed on the side wall of the middle guide rail, the cam is fixedly installed on the output shaft of the stepper motor, and the cam is provided with a sliding groove. A guide wheel is rotatably connected to one end of the shaped frame near the stepper motor, and the guide wheel is slidably connected to the sliding groove of the cam. Two baffles are provided on the shaped frame. An upper guide rail is fixedly installed on the upper side of the middle guide rail, and a conveyor belt is fixedly installed on the upper guide rail.

[0016] To better achieve the objectives of this invention, this invention also provides an assembly method for an assembly device for evaporator welded tubes, comprising the following steps:

[0017] Step 1: Place the flange on the conveyor belt. The conveyor belt transports the flange to the upper guide rail. The flange slides from the upper guide rail to the middle guide rail. Start the stepper motor. The output shaft of the stepper motor rotates, which drives the cam to rotate. The rotation of the cam causes the irregular frame to move left and right intermittently. Two baffles on the irregular frame cause the flange to fall intermittently from the middle guide rail to the lower guide rail. The limiting block makes the flange move automatically to the mold.

[0018] Step 2: Place the middle part of the pipe fitting on the middle fixing clamp and the tail part of the pipe fitting on the tail positioning clamp. The photoelectric switch detects whether the pipe fitting is placed accurately. Only after ensuring accurate positioning can the gas-liquid booster cylinder be started.

[0019] Step 3: Start the gas-hydraulic booster cylinder. The start of the gas-hydraulic booster cylinder drives the connecting rod to move towards the flange, the tension spring is stretched, the connecting rod moves towards the flange, the slider moves towards the flange, the slider moves towards the flange, the force distribution rod moves towards the flange, the force distribution rod moves towards the flange, the force transmission component moves towards the flange, the force transmission component moves towards the flange, the pressure block moves towards the flange, the pressure block acts on the flange at a 25-degree angle downward, generating a downward force and a horizontal compressive force, so that the pipe fitting and the flange fit tightly together;

[0020] Step 4: Close the gas-liquid booster cylinder, the stretched tension spring returns to its original state, pull the connecting rod back to its initial position, remove the pipe fitting, and prepare for the next operation.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] This invention utilizes a pressure block that moves obliquely downwards to act on the flange, generating a downward component force and a horizontal compressive force, ensuring a tight fit between the pipe fitting and the flange. Through a force transmission and direction-changing device and a clamping and positioning device, this invention offers advantages over traditional welding, including a shorter working stroke and shorter working time. Furthermore, it eliminates the need for gas heating, thus avoiding the emission of harmful gases such as carbon dioxide. Since there is no thermal deformation, no straightening is required, saving manpower and reducing labor costs. An intermittent feeding device allows the equipment to automatically and intermittently transport flanges individually to designated positions, improving processing efficiency. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 for Figure 1 Enlarged view of A in the middle;

[0025] Figure 3 This is a schematic diagram of the flange and pipe fitting structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the force transmission and direction-changing device of the present invention;

[0027] Figure 5 This is a cross-sectional view of the force transmission and direction-changing device of the present invention;

[0028] Figure 6 This is a schematic diagram of the intermittent feeding device of the present invention;

[0029] Figure 7 This is a partial structural diagram of the intermittent feeding device of the present invention.

[0030] In the diagram: 1. Frame; 2. Mold; 3. Flange; 4. Fixture positioning device; 41. Middle fixed fixture; 42. Tail positioning fixture; 43. Photoelectric switch; 5. Force transmission and direction changing device; 51. Guide block; 52. Force direction changing block; 53. Limiting frame; 6. Pushing force transmission component; 7. Pressure block; 8. Parallel force distribution structure; 81. Fixed guide rail; 82. Slider; 83. Connecting rod; 84. Component rod; 9. Pneumatic-hydraulic booster cylinder; 10. Tension spring; 11. Lower guide rail; 12. Middle guide rail; 13. Irregular frame; 14. Stepper motor; 15. Cam; 16. Guide wheel; 17. Upper guide rail; 18. Conveyor belt; 19. Baffle; 20. Pipe fitting. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] The present invention will be further described below with reference to embodiments.

[0033] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0034] Example 1

[0035] Please see Figures 1-7 In this embodiment of the invention, an evaporator welded pipe includes a flange 3 and a pipe fitting 20. The flange 3 has two openings, and each opening has two protruding points on its inner sidewall. The pipe fitting 20 has two recessed points on its outer sidewall. The two protruding points on the inner sidewall of the openings and the two recessed points on the outer sidewall of the pipe fitting 20 are tightly fitted together to prevent relative rotation and relative sliding between the pipe fitting 20 and the flange 3, thereby achieving a tight fit.

[0036] An assembly device for welding tubes of evaporators includes a frame 1, a mold 2 fixedly mounted on the frame 1, a flange 3 provided on the upper side of the mold 2, a clamping positioning device 4 provided on the right side of the mold 2, the clamping positioning device 4 being mounted on the upper side of the frame 1, and multiple force transmission and direction changing devices 5 mounted on the upper side of the frame 1, the force transmission and direction changing devices 5 being symmetrically arranged on the left and right sides of the mold 2, each force transmission and direction changing device 5 including: a guide block 51, a force direction changing block 52, a limiting frame 53, and a force transmission mechanism, the guide block 51 being fixedly mounted on the upper side of the frame 1, the guide block 51 being provided with a guide groove, the force direction changing block 52 being fixedly mounted on the guide block 51, the limiting frame 53 being fixedly mounted on the upper side of the force direction changing block 52, the force transmission mechanism being mounted on the guide block 51, and a limiting block being mounted on the frame 1, the limiting block being in close contact with the front end of the flange 3;

[0037] The force transmission mechanism includes: a pushing force transmission component 6 and a pressure block 7. The pushing force transmission component 6 is slidably connected to the guide groove, and the pressure block 7 is slidably connected to the limiting frame 53. The angle between the pressure block 7 and the frame 1 is 25 degrees. The end of the pressure block 7 near the limiting frame 53 is in close contact with the end of the pushing force transmission component 6 near the guide groove.

[0038] The fixture positioning device 4 includes: a middle fixing fixture 41, a tail positioning fixture 42, and a photoelectric switch 43. The middle fixing fixture 41 is fixedly installed on the frame 1 on the right side of the mold 2, the tail positioning fixture 42 is fixedly installed on the frame 1 on the right side of the middle fixing fixture 41, and the photoelectric switch 43 is fixedly installed on the upper side of the tail positioning fixture 42. Pipe fittings 20 are provided on the middle fixing fixture 41 and the tail positioning fixture 42.

[0039] In this invention, the middle part of the pipe fitting 20 is placed on the middle fixing clamp 41, and the tail part of the pipe fitting 20 is placed on the tail positioning clamp 42. The photoelectric switch 43 detects whether the pipe fitting 20 is placed accurately.

[0040] Multiple parallel force-sharing structures 8 are installed on the upper side of the frame 1. The parallel force-sharing structures 8 are located at the end of the push force transmission component 6 away from the guide groove.

[0041] The parallel force-sharing structure 8 includes: a fixed guide rail 81, a slider 82, a connecting rod 83, and force-sharing rods 84. The fixed guide rail 81 is fixedly installed on the upper surface of the frame 1. The slider 82 is slidably connected to the fixed guide rail 81. The connecting rod 83 is fixedly installed on the end of the slider 82 away from the guide groove. Multiple force-sharing rods 84 are fixedly installed on the end of the slider 82 away from the connecting rod 83. The end of each force-sharing rod 84 away from the slider 82 is fixedly connected to the end of the push force transmission component 6 away from the guide groove.

[0042] Each connecting rod 83 is equipped with a gas-liquid booster cylinder 9 at the end away from the slider 82. The gas-liquid booster cylinder 9 is fixedly installed on the upper side of the frame 1. The output end of the gas-liquid booster cylinder 9 is fixedly installed at the end of the connecting rod 83 away from the slider 82. A tension spring 10 is slidably connected to the output end of the gas-liquid booster cylinder 9. One end of the tension spring 10 is fixedly installed on the connecting rod 83, and the other end of the tension spring 10 is fixedly installed on the gas-liquid booster cylinder 9.

[0043] In this invention, the gas-liquid booster cylinder 9 is activated, which drives the connecting rod 83 to move towards the flange 3, stretching the tension spring 10. The movement of the connecting rod 83 towards the flange 3 drives the slider 82 to move towards the flange 3, which in turn drives the force-transmitting rod 84 to move towards the flange 3. The movement of the force-transmitting rod 84 towards the flange 3 drives the pushing force transmission component 6 to move towards the flange 3, which in turn drives the pressure block 7 to move towards the flange 3.

[0044] Example 2

[0045] like Figure 1-7 As shown, in a preferred embodiment of the present invention, an intermittent feeding device is preferably installed on the upper side of the frame 1;

[0046] The intermittent feeding device includes: a lower guide rail 11, a middle guide rail 12, a shaped frame 13, a stepper motor 14, and a cam 15. The lower guide rail 11 is fixedly installed on the upper side of the frame 1, the middle guide rail 12 is fixedly installed on the upper side of the lower guide rail 11, the shaped frame 13 is slidably connected to the middle guide rail 12, the stepper motor 14 is fixedly installed on the side wall of the middle guide rail 12, the cam 15 is fixedly installed on the output shaft of the stepper motor 14, and the cam 15 is provided with a sliding groove. The end of the shaped frame 13 near the stepper motor 14 is rotatably connected to a guide wheel 16, and the guide wheel 16 is slidably connected to the sliding groove of the cam 15. The shaped frame 13 is provided with two baffles 19, an upper guide rail 17 is fixedly installed on the upper side of the middle guide rail 12, and a conveyor belt 18 is fixedly installed on the upper guide rail 17.

[0047] In this invention, flange 3 is placed on conveyor belt 18, which transports flange 3 to upper guide rail 17. Flange 3 slides from upper guide rail 17 to middle guide rail 12. Stepper motor 14 is started, and stepper motor 14 rotates, driving cam 15 to rotate. The rotation of cam 15 causes irregular frame 13 to move left and right intermittently. Two baffles 19 on irregular frame 13 cause flange 3 to fall intermittently from middle guide rail 12 to lower guide rail 11. Through the limiting block, flange 3 is automatically moved to mold 2.

[0048] Example 3

[0049] like Figure 1-7 As shown, in a preferred embodiment of the present invention, an assembly method for an assembly device for evaporator welding tubes is described below:

[0050] Step 1: Place flange 3 on conveyor belt 18. Conveyor belt 18 transports flange 3 to upper guide rail 17. Flange 3 slides from upper guide rail 17 to middle guide rail 12. Start stepper motor 14. The output shaft of stepper motor 14 rotates, driving cam 15 to rotate. The rotation of cam 15 causes irregular frame 13 to move left and right intermittently. Two baffles 19 on irregular frame 13 cause flange 3 to fall intermittently from middle guide rail 12 to lower guide rail 11. Through the limiting block, flange 3 automatically moves to mold 2.

[0051] Step 2: Place the middle part of the pipe fitting 20 on the middle fixing clamp 41, and place the tail part of the pipe fitting 20 on the tail positioning clamp 42. The photoelectric switch 43 detects whether the pipe fitting 20 is placed accurately. Only after ensuring accurate positioning can the gas-liquid booster cylinder 9 be started.

[0052] Step 3: Start the gas-liquid booster cylinder 9. The start of the gas-liquid booster cylinder 9 drives the connecting rod 83 to move towards the flange 3. The tension spring 10 is stretched. The movement of the connecting rod 83 towards the flange 3 drives the slider 82 to move towards the flange 3. The movement of the slider 82 towards the flange 3 drives the force-contributing rod 84 to move towards the flange 3. The movement of the force-contributing rod 84 towards the flange 3 drives the pushing force transmission component 6 to move towards the flange 3. The movement of the pushing force transmission component 6 towards the flange 3 drives the pressure block 7 to move towards the flange 3. The pressure block 7 acts on the flange 3 at a 25-degree angle downward, generating a downward force and a horizontal compressive force, so that the pipe fitting 20 and the flange 3 are tightly fitted together.

[0053] Step 4: Close the gas-liquid booster cylinder 9, the stretched tension spring 10 returns to its original state, pull the connecting rod 83 back to its initial position, remove the pipe fitting 20, and prepare for the next operation.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An assembly apparatus for welding tubes in an evaporator, comprising a frame (1), characterized in that, A mold (2) is fixedly installed on the frame (1). A flange (3) is provided on the upper side of the mold (2). A clamp positioning device (4) is provided on the right side of the mold (2). The clamp positioning device (4) is installed on the upper side of the frame (1). Multiple force transmission and direction changing devices (5) are installed on the upper side of the frame (1). The force transmission and direction changing devices (5) are symmetrically arranged on the left and right sides of the mold (2). The force transmission and direction changing device (5) includes: a guide block (51), a force direction changing block (52), a limit frame (53), and a force transmission mechanism. The guide block (51) is fixedly installed on the upper side of the frame (1). A guide groove is provided on the guide block (51). The force direction changing block (52) is fixedly installed on the guide block (51). The limit frame (53) is fixedly installed on the upper side of the force direction changing block (52). The force transmission mechanism is installed on the guide block (51). A limit block is installed on the frame (1). The limit block is close to the front end of the flange (3). The force transmission mechanism includes: a pushing force transmission component (6) and a pressure block (7). The pushing force transmission component (6) is slidably connected to the guide groove, and the pressure block (7) is slidably connected to the limiting frame (53). The end of the pressure block (7) near the limiting frame (53) is in close contact with the end of the pushing force transmission component (6) near the guide groove. Multiple parallel force-sharing structures (8) are installed on the upper side of the frame (1), and the parallel force-sharing structures (8) are located at the end of the push force transmission component (6) away from the guide groove; The parallel force-sharing structure (8) includes: a fixed guide rail (81), a slider (82), a connecting rod (83), and force-sharing rods (84). The fixed guide rail (81) is fixedly installed on the upper surface of the frame (1). The slider (82) is slidably connected to the fixed guide rail (81). The connecting rod (83) is fixedly installed at the end of the slider (82) away from the guide groove. Multiple force-sharing rods (84) are fixedly installed at the end of the slider (82) away from the connecting rod (83). The end of each force-sharing rod (84) away from the slider (82) is fixedly connected to the end of the push-transmitting force component (6) away from the guide groove. The evaporator welded pipe includes a flange (3) and a fitting (20). The flange (3) has two openings, and each opening has two protruding points on its inner sidewall. The fitting (20) has two recessed points on its outer sidewall. The two protruding points on the inner sidewall of the opening and the two recessed points on the outer sidewall of the fitting (20) fit together tightly.

2. The assembly equipment according to claim 1, characterized in that, The fixture positioning device (4) includes: a middle fixing fixture (41), a tail positioning fixture (42) and a photoelectric switch (43). The middle fixing fixture (41) is fixedly installed on the frame (1) on the right side of the mold (2). The tail positioning fixture (42) is fixedly installed on the frame (1) on the right side of the middle fixing fixture (41). The photoelectric switch (43) is fixedly installed on the upper side of the tail positioning fixture (42). Pipe fittings (20) are provided on the middle fixing fixture (41) and the tail positioning fixture (42).

3. The assembly equipment according to claim 2, characterized in that, Each of the connecting rods (83) is provided with a gas-liquid booster cylinder (9) at the end away from the slider (82). The gas-liquid booster cylinder (9) is fixedly installed on the upper side of the frame (1). The output end of the gas-liquid booster cylinder (9) is fixedly installed at the end of the connecting rod (83) away from the slider (82). The output end of the gas-liquid booster cylinder (9) is slidably connected to a tension spring (10). One end of the tension spring (10) is fixedly installed on the connecting rod (83), and the other end of the tension spring (10) is fixedly installed on the gas-liquid booster cylinder (9).

4. The assembly equipment according to claim 3, characterized in that, An intermittent feeding device is installed on the upper side of the frame (1).

5. The assembly equipment according to claim 4, characterized in that, The intermittent feeding device includes: a lower guide rail (11), a middle guide rail (12), a shaped frame (13), a stepper motor (14), and a cam (15). The lower guide rail (11) is fixedly installed on the upper side of the frame (1), the middle guide rail (12) is fixedly installed on the upper side of the lower guide rail (11), the shaped frame (13) is slidably connected to the middle guide rail (12), the stepper motor (14) is fixedly installed on the side wall of the middle guide rail (12), and the cam (15) is fixedly installed on the lower guide rail (11). On the output shaft of the stepper motor (14), the cam (15) is provided with a sliding groove. The end of the irregular frame (13) near the stepper motor (14) is rotatably connected to a guide wheel (16). The guide wheel (16) is slidably connected to the sliding groove of the cam (15). The irregular frame (13) is provided with two baffles (19). The upper guide rail (17) is fixedly installed on the upper side of the middle guide rail (12). The conveyor belt (18) is fixedly installed on the upper guide rail (17).

6. A method for assembling the assembly equipment as described in claim 5, characterized in that, Includes the following steps: Step 1: Place the flange (3) on the conveyor belt (18). The conveyor belt (18) transports the flange (3) to the upper guide rail (17). The flange (3) slides from the upper guide rail (17) to the middle guide rail (12). Start the stepper motor (14). The output shaft of the stepper motor (14) rotates, driving the cam (15) to rotate. The rotation of the cam (15) causes the irregular frame (13) to move left and right intermittently. The two baffles (19) on the irregular frame (13) cause the flange (3) to fall intermittently from the middle guide rail (12) to the lower guide rail (11). The limiting block causes the flange (3) to move automatically to the mold (2). Step 2: Place the middle part of the pipe fitting (20) on the middle fixing clamp (41) and place the tail part of the pipe fitting (20) on the tail positioning clamp (42). The photoelectric switch (43) detects whether the pipe fitting (20) is placed accurately. Only after ensuring accurate positioning can the gas-liquid booster cylinder (9) be started. Step 3: Start the gas-liquid booster cylinder (9). The gas-liquid booster cylinder (9) starts and drives the connecting rod (83) to move towards the flange (3). The tension spring (10) is stretched. The connecting rod (83) moves towards the flange (3) and drives the slider (82) to move towards the flange (3). The slider (82) moves towards the flange (3) and drives the force transmission rod (84) to move towards the flange (3). The force transmission rod (84) moves towards the flange (3) and drives the push force transmission component (6) to move towards the flange (3). The push force transmission component (6) moves towards the flange (3) and drives the pressure block (7) to move towards the flange (3). The pressure block (7) acts on the flange (3) at a 25-degree angle downward, generating a downward force and a horizontal squeezing force, so that the pipe fitting (20) and the flange (3) fit tightly together. Step 4: Close the gas-liquid booster cylinder (9), the stretched spring (10) returns to its original state, pull the connecting rod (83) back to its initial position, take out the fitting (20), and prepare for the next operation.

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