A high-frequency welding device and welding method for butterfly valve production

Abstract

This invention discloses a high-frequency welding device and method for butterfly valve production, belonging to the field of valve body manufacturing. The high-frequency welding device for butterfly valve production includes a machine body with high-frequency contacts. A drive motor is fixedly connected to the machine body, and a turntable is fixedly connected to the drive end of the drive motor. An impedance device is fixedly connected to the center of the turntable. It also includes clamping rods symmetrically rotatably connected to the turntable for clamping the valve body. A push rack rod is slidably connected to the turntable, located between the two clamping rods, and each of the two clamping rods is connected to a threaded rod. This invention further stabilizes the valve body. As the connecting flange moves downward, a negative pressure is generated in the upper space of the support cylinder, creating a negative pressure on the adsorption plate, thereby effectively adsorbing the support column connecting flange and achieving rapid support, adsorption, and stabilization of the valve body and connecting flange.

Description

Technical Field

[0001] This invention relates to the field of valve body manufacturing technology, and in particular to a high-frequency welding device and welding method for butterfly valve production. Background Technology

[0002] High-frequency welding is a welding method that uses high-frequency current to generate resistance heat by flowing through the contact surface of the workpiece, and applies pressure or no pressure to form a connection between the metal parts of the workpiece. During high-frequency welding, welding current is generated by high-frequency contacts and impedance devices, and the welding current only makes parallel contact with the surface of the workpiece.

[0003] High-frequency welding is also used in valve manufacturing. Valves need to be connected to pipelines, usually via flanges. The valve body typically requires a welded flange. High-frequency welding utilizes the skin effect of high-frequency current to concentrate high-frequency electrical energy on the surface of the workpiece. Furthermore, high-frequency welding incorporates an impedance element, i.e., a magnetic rod, to enhance the skin effect and proximity effect on the steel strip surface. By forming a current loop between the conductor and the workpiece and placing the conductor close to this point on the workpiece, they become adjacent conductors, achieving high-frequency welding. During welding, the flange and valve body need to be supported. Given the large demand for valve bodies, rapid support and clamping of the valve body and flange are required for welding to meet current high production demands. Therefore, a high-frequency welding device and method capable of rapidly clamping valve bodies and supporting flanges is crucial. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of the lack of a high-frequency welding device in the prior art that can quickly clamp and support the valve body and connecting flange, and to propose a high-frequency welding device and welding method for butterfly valve production.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-frequency welding device for butterfly valve production includes a machine body with high-frequency contacts, a drive motor fixedly connected to the machine body, a turntable fixedly connected to the drive end of the drive motor, an impedance device fixedly connected to the center of the turntable, and further includes...

[0007] A clamping rod symmetrically rotates on the turntable to clamp the valve body;

[0008] A slidingly connected rack and pinion lever on the turntable is located between the two clamping levers.

[0009] in

[0010] Both clamping rods are connected to threaded rods, and the two threaded rods are connected by threaded sleeves. The threaded sleeves are rotatably connected to the turntable, and a gear matching the push rack rod is fixedly sleeved on the threaded sleeves.

[0011] A support cylinder is fixedly connected to the turntable;

[0012] A support rod with a piston is slidably connected in the support cylinder to support the connecting flange;

[0013] A plug-in tube is fixedly connected to the turntable, and the lower end of the plug-in tube is connected to the support tube through an air supply pipe.

[0014] A piston-equipped insert rod is slidably connected within the insert sleeve;

[0015] A stabilizing plate with a socket is fixedly connected to the lower end of the push rack rod, and the plug rod matches the socket.

[0016] Preferably, a negative pressure cylinder is fixedly connected to the turntable, and a negative pressure rod with a piston is slidably connected in the negative pressure cylinder. The negative pressure rod is located below the stabilizing plate, and the upper end of the negative pressure cylinder is connected to the upper end of the support cylinder through a negative pressure pipe.

[0017] Preferably, a first return spring is connected between the negative pressure rod and the bottom wall of the negative pressure cylinder.

[0018] Preferably, a support plate is fixedly connected to the upper end of the support rod, and an adsorption plate is fixedly connected to the support plate. Both the support rod and the support plate are provided with air intake holes. The air intake holes are connected to the upper end of the support cylinder, and the upper end of the air intake holes is connected to the adsorption plate.

[0019] Preferably, a first pressing valve is connected to the air intake hole, and a first pressing rod for pressing the first pressing valve is fixedly connected to the support cylinder.

[0020] Preferably, an external suction tube communicating with the suction hole is fixedly connected to the support rod, a second pressing valve is connected to the external suction tube, and a second pressing rod for pressing the second pressing valve is fixedly connected to the support cylinder.

[0021] Preferably, a third press valve is connected to the air intake hole in the support plate. When the connecting flange is pressed tightly against the support plate, the connecting flange presses the third press valve to open.

[0022] Preferably, a rubber head is fixedly connected to the clamping end of the clamping rod.

[0023] Preferably, a second return spring is fitted on the insertion rod, and the two ends of the second return spring are respectively connected to the insertion rod and the inner wall of the insertion cylinder.

[0024] A welding method for a high-frequency welding device for butterfly valve production mainly includes the following steps:

[0025] S1. First, place the valve body in the turntable so that the valve body is positioned between the two clamping rods;

[0026] S2. Press the valve body down forcefully. The valve body will press down and push the rack rod. At this time, pushing the rack rod will drive the threaded sleeve to rotate through the gear. As a result, the threaded sleeve will drive the threaded rod to move outward, and the clamping rod will initially clamp the valve body.

[0027] S3. While pressing down the valve body, also put the connecting flange on the outside of the valve body and press down the connecting flange simultaneously.

[0028] S4. As the connecting flange moves downward, it will press down the support rod, thereby compressing the gas in the support cylinder and entering the insertion cylinder. At this time, the pressure in the insertion cylinder increases, which will push the insertion rod to move. The insertion rod will be inserted into the insertion hole of the stabilizing plate fixed at the lower end of the push rack rod.

[0029] S5. As the stabilizing plate moves downward along with the rack and pinion, it will push the negative pressure rod downward. The negative pressure rod moves downward in the negative pressure cylinder, which will generate negative pressure in the upper space of the negative pressure cylinder. When the support rod moves downward, the upper space of the support cylinder will also generate negative pressure. The two are connected through the negative pressure pipe, so that a certain negative pressure is generated in the upper space of the support cylinder.

[0030] S6. The upper end of the support rod is fixedly connected to a support plate with an adsorption plate. The adsorption plate is connected to the upper part of the support cylinder through the air suction hole, so that the adsorption plate generates negative pressure, making the connecting flange and valve body stable in the turntable.

[0031] S7. Start the high-frequency contact and drive motor. Align the high-frequency contact with the connection between the connecting flange and the valve body. The drive motor drives the turntable to rotate, so that the connecting flange is welded to the valve body.

[0032] Compared with the prior art, the present invention provides a high-frequency welding device and welding method for butterfly valve production, which has the following advantages:

[0033] 1. The high-frequency welding device and welding method for the valve body used in the production of this butterfly valve involves pressing the valve body and connecting flange downwards. The threaded sleeve drives the threaded rod to move outwards, thereby pushing the clamping rod and initially clamping the valve body. As the connecting flange moves downwards, it pushes the insert rod to move. The insert rod is inserted into the insertion hole of the stabilizing plate fixed at the lower end of the push rack rod, thereby further stabilizing the valve body. At the same time as the connecting flange moves downwards, a negative pressure is generated in the upper space of the support cylinder, which generates a negative pressure on the adsorption plate, thereby effectively adsorbing the support column and connecting flange, achieving rapid support, adsorption, and stabilization of the valve body and connecting flange. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a high-frequency welding device for butterfly valve production proposed in this invention.

[0035] Figure 2 This is a front structural schematic diagram of a high-frequency welding device for butterfly valve production proposed in this invention.

[0036] Figure 3 This invention proposes a high-frequency welding device for butterfly valve production. Figure 2 Schematic diagram of the structure at point A;

[0037] Figure 4 This invention proposes a high-frequency welding device for butterfly valve production. Figure 3 Schematic diagram of the structure at point C;

[0038] Figure 5 This invention proposes a high-frequency welding device for butterfly valve production. Figure 3 Schematic diagram of the structure at point B;

[0039] Figure 6 This invention proposes a high-frequency welding device for butterfly valve production. Figure 3 Schematic diagram of the structure at point D;

[0040] Figure 7 This invention proposes a high-frequency welding device for butterfly valve production. Figure 6 A schematic diagram of the structure at point E in the middle.

[0041] In the diagram: 1. Body; 2. Turntable; 3. Impedance device; 4. High-frequency contact; 5. Connecting flange; 6. Valve body; 7. Drive motor; 8. Clamping rod; 9. Push rack rod; 901. Stabilizing plate; 10. Rubber head; 11. Air supply pipe; 12. Negative pressure pipe; 13. Support cylinder; 14. Gear; 15. Threaded sleeve; 16. Negative pressure cylinder; 17. Negative pressure rod; 18. First return spring; 19. Insert rod; 20. Second return spring; 21. Insert cylinder; 22. Support rod; 23. Threaded rod; 24. Suction hole; 25. Support plate; 26. Adsorption plate; 27. First pressing rod; 28. Third pressing valve; 29. ​​First pressing valve; 30. External suction pipe; 31. Second pressing valve; 32. Second pressing rod. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0043] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] Example 1:

[0045] Reference Figure 1-7 A high-frequency welding device for butterfly valve production includes a body 1 with a high-frequency contact 4, a drive motor 7 fixedly connected to the body 1, a turntable 2 fixedly connected to the drive end of the drive motor 7, and an impedance device 3 fixedly connected to the middle of the turntable 2. It also includes...

[0046] The clamping rod 8, which is symmetrically rotated and connected to the turntable 2, is used to clamp the valve body 6;

[0047] A slidingly connected push rack 9 on the turntable 2 is located between two clamping rods 8.

[0048] Both clamping rods 8 are connected to threaded rods 23, and the two threaded rods 23 are connected by threaded sleeves 15. The threaded sleeves 15 are rotatably connected to the turntable 2, and a gear 14 matching the push rack rod 9 is fixedly sleeved on the threaded sleeves 15; a slider is slidably connected to the clamping rods 8, and the threaded rods 23 are rotatably connected to the slider.

[0049] Press the valve body 6 down forcefully, and the valve body 6 will push the rack rod 9. At this time, pushing the rack rod 9 will drive the threaded sleeve 15 to rotate through the gear 14. As a result, the threaded sleeve 15 will drive the threaded rod 23 to move outward, thereby pushing the clamping rod 8. The clamping rod 8 initially clamps the valve body 6. The clamping end of the clamping rod 8 is fixedly connected to the rubber head 10 for better clamping of the valve body 6.

[0050] Support cylinder 13 is fixedly connected to turntable 2;

[0051] The support rod 22 with a piston is slidably connected in the support cylinder 13 to support the connecting flange 5;

[0052] As the connecting flange 5 moves downward, it presses down the support rod 22, thereby compressing the gas in the support cylinder 13 and entering the insertion cylinder 21. At this time, the pressure in the insertion cylinder 21 increases, which pushes the insertion rod 19 to move. The insertion rod 19 will be inserted into the insertion hole of the stabilizing plate 901 fixed at the lower end of the push rack rod 9, thereby further stabilizing the valve body 6 and achieving rapid clamping of the valve body 6.

[0053] The plug-in tube 21 is fixedly connected to the turntable 2, and the lower end of the plug-in tube 21 is connected to the support tube 13 through the air supply pipe 11.

[0054] The insert rod 19 with a piston is slidably connected in the insert sleeve 21; a second return spring 20 is sleeved on the insert rod 19, and the two ends of the second return spring 20 are respectively connected to the insert rod 19 and the inner wall of the insert sleeve 21 to facilitate the reset of the insert rod 19.

[0055] A stabilizing plate 901 with a socket is fixedly connected to the lower end of the push rack 9, and the insert rod 19 matches the socket.

[0056] Example 2:

[0057] Reference Figure 1-7 A high-frequency welding device for butterfly valve production includes a body 1 with a high-frequency contact 4, a drive motor 7 fixedly connected to the body 1, a turntable 2 fixedly connected to the drive end of the drive motor 7, and an impedance device 3 fixedly connected to the middle of the turntable 2. It also includes...

[0058] The clamping rod 8, which is symmetrically rotated and connected to the turntable 2, is used to clamp the valve body 6;

[0059] A slidingly connected push rack 9 on the turntable 2 is located between two clamping rods 8.

[0060] Both clamping rods 8 are connected to threaded rods 23, and the two threaded rods 23 are connected by threaded sleeves 15. The threaded sleeves 15 are rotatably connected to the turntable 2, and a gear 14 matching the push rack rod 9 is fixedly sleeved on the threaded sleeves 15; a slider is slidably connected to the clamping rods 8, and the threaded rods 23 are rotatably connected to the slider.

[0061] Press the valve body 6 down forcefully, and the valve body 6 will push the rack rod 9. At this time, pushing the rack rod 9 will drive the threaded sleeve 15 to rotate through the gear 14. As a result, the threaded sleeve 15 will drive the threaded rod 23 to move outward, thereby pushing the clamping rod 8. The clamping rod 8 initially clamps the valve body 6. The clamping end of the clamping rod 8 is fixedly connected to the rubber head 10 for better clamping of the valve body 6.

[0062] Support cylinder 13 is fixedly connected to turntable 2;

[0063] The support rod 22 with a piston is slidably connected in the support cylinder 13 to support the connecting flange 5;

[0064] As the connecting flange 5 moves downward, it presses down the support rod 22, thereby compressing the gas in the support cylinder 13 and entering the insertion cylinder 21. At this time, the pressure in the insertion cylinder 21 increases, which pushes the insertion rod 19 to move. The insertion rod 19 will be inserted into the insertion hole of the stabilizing plate 901 fixed at the lower end of the push rack rod 9, thereby further stabilizing the valve body 6 and achieving rapid clamping of the valve body 6.

[0065] The plug-in tube 21 is fixedly connected to the turntable 2, and the lower end of the plug-in tube 21 is connected to the support tube 13 through the air supply pipe 11.

[0066] The insert rod 19 with a piston is slidably connected in the insert sleeve 21; a second return spring 20 is sleeved on the insert rod 19, and the two ends of the second return spring 20 are respectively connected to the insert rod 19 and the inner wall of the insert sleeve 21 to facilitate the reset of the insert rod 19.

[0067] A stabilizing plate 901 with a socket is fixedly connected to the lower end of the push rack 9, and the insert rod 19 matches the socket.

[0068] A negative pressure cylinder 16 is fixedly connected to the turntable 2. A negative pressure rod 17 with a piston is slidably connected in the negative pressure cylinder 16. The negative pressure rod 17 is located below the stabilizing plate 901. The upper end of the negative pressure cylinder 16 is connected to the upper end of the support cylinder 13 through a negative pressure pipe 12.

[0069] As the stabilizing plate 901 moves downward along with the rack and pinion 9, it will push the negative pressure rod 17 downward. The negative pressure rod 17 moves downward in the negative pressure cylinder 16, which will generate negative pressure in the upper space of the negative pressure cylinder 16. When the support rod 22 moves downward, the upper space of the support cylinder 13 will also generate negative pressure. The two are connected through the negative pressure pipe 12, which will generate a certain amount of negative pressure in the upper space of the support cylinder 13.

[0070] A first return spring 18 is connected between the negative pressure rod 17 and the bottom wall of the negative pressure cylinder 16 to facilitate the reset of the negative pressure rod 17.

[0071] A support plate 25 is fixedly connected to the upper end of the support rod 22, and an adsorption plate 26 is fixedly connected to the support plate 25. Both the support rod 22 and the support plate 25 are provided with air suction holes 24. The air suction holes 24 are connected to the upper end of the support cylinder 13, and the upper end of the air suction holes 24 is connected to the adsorption plate 26. In actual use, after welding, it is easy to remove the connecting flange 5. An external valve connected to the adsorption plate 26 is connected to the support plate 25 to allow the adsorption plate 26 to be vented and removed.

[0072] The upper end of the support rod 22 is fixedly connected to the support plate 25 with the adsorption plate 26. The adsorption plate 26 is connected to the upper part of the support cylinder 13 through the air suction hole 24, so that the adsorption plate 26 generates negative pressure, thereby effectively adsorbing the support column connecting flange 5, making the connecting flange 5 and the valve body 6 stable in the turntable 2, which facilitates rapid and effective stabilization and makes it convenient for subsequent high-frequency welding.

[0073] Example 3:

[0074] Reference Figure 1-7 A high-frequency welding device for butterfly valve production includes a body 1 with a high-frequency contact 4, a drive motor 7 fixedly connected to the body 1, a turntable 2 fixedly connected to the drive end of the drive motor 7, and an impedance device 3 fixedly connected to the middle of the turntable 2. It also includes...

[0075] The clamping rod 8, which is symmetrically rotated and connected to the turntable 2, is used to clamp the valve body 6;

[0076] A slidingly connected push rack 9 on the turntable 2 is located between two clamping rods 8.

[0077] Both clamping rods 8 are connected to threaded rods 23, and the two threaded rods 23 are connected by threaded sleeves 15. The threaded sleeves 15 are rotatably connected to the turntable 2, and a gear 14 matching the push rack rod 9 is fixedly sleeved on the threaded sleeves 15; a slider is slidably connected to the clamping rods 8, and the threaded rods 23 are rotatably connected to the slider.

[0078] Press the valve body 6 down forcefully, and the valve body 6 will push the rack rod 9. At this time, pushing the rack rod 9 will drive the threaded sleeve 15 to rotate through the gear 14. As a result, the threaded sleeve 15 will drive the threaded rod 23 to move outward, thereby pushing the clamping rod 8. The clamping rod 8 initially clamps the valve body 6. The clamping end of the clamping rod 8 is fixedly connected to the rubber head 10 for better clamping of the valve body 6.

[0079] Support cylinder 13 is fixedly connected to turntable 2;

[0080] The support rod 22 with a piston is slidably connected in the support cylinder 13 to support the connecting flange 5;

[0081] As the connecting flange 5 moves downward, it presses down the support rod 22, thereby compressing the gas in the support cylinder 13 and entering the insertion cylinder 21. At this time, the pressure in the insertion cylinder 21 increases, which pushes the insertion rod 19 to move. The insertion rod 19 will be inserted into the insertion hole of the stabilizing plate 901 fixed at the lower end of the push rack rod 9, thereby further stabilizing the valve body 6 and achieving rapid clamping of the valve body 6.

[0082] The plug-in tube 21 is fixedly connected to the turntable 2, and the lower end of the plug-in tube 21 is connected to the support tube 13 through the air supply pipe 11.

[0083] The insert rod 19 with a piston is slidably connected in the insert sleeve 21; a second return spring 20 is sleeved on the insert rod 19, and the two ends of the second return spring 20 are respectively connected to the insert rod 19 and the inner wall of the insert sleeve 21 to facilitate the reset of the insert rod 19.

[0084] A stabilizing plate 901 with a socket is fixedly connected to the lower end of the push rack 9, and the insert rod 19 matches the socket.

[0085] A negative pressure cylinder 16 is fixedly connected to the turntable 2. A negative pressure rod 17 with a piston is slidably connected in the negative pressure cylinder 16. The negative pressure rod 17 is located below the stabilizing plate 901. The upper end of the negative pressure cylinder 16 is connected to the upper end of the support cylinder 13 through a negative pressure pipe 12.

[0086] As the stabilizing plate 901 moves downward along with the rack and pinion 9, it will push the negative pressure rod 17 downward. The negative pressure rod 17 moves downward in the negative pressure cylinder 16, which will generate negative pressure in the upper space of the negative pressure cylinder 16. When the support rod 22 moves downward, the upper space of the support cylinder 13 will also generate negative pressure. The two are connected through the negative pressure pipe 12, which will generate a certain amount of negative pressure in the upper space of the support cylinder 13.

[0087] A first return spring 18 is connected between the negative pressure rod 17 and the bottom wall of the negative pressure cylinder 16 to facilitate the reset of the negative pressure rod 17.

[0088] A support plate 25 is fixedly connected to the upper end of the support rod 22, and an adsorption plate 26 is fixedly connected to the support plate 25. Both the support rod 22 and the support plate 25 are provided with air suction holes 24. The air suction holes 24 are connected to the upper end of the support cylinder 13, and the upper end of the air suction holes 24 is connected to the adsorption plate 26. In actual use, after welding, it is easy to remove the connecting flange 5. An external valve connected to the adsorption plate 26 is connected to the support plate 25 to allow the adsorption plate 26 to be vented and removed.

[0089] The upper end of the support rod 22 is fixedly connected to the support plate 25 with the adsorption plate 26. The adsorption plate 26 is connected to the upper part of the support cylinder 13 through the air suction hole 24, so that the adsorption plate 26 generates negative pressure, thereby effectively adsorbing the support column connecting flange 5, making the connecting flange 5 and the valve body 6 stable in the turntable 2, which facilitates rapid and effective stabilization and makes it convenient for subsequent high-frequency welding.

[0090] A first pressing valve 29 is connected to the air intake port 24, and a first pressing rod 27 for pressing the first pressing valve 29 is fixedly connected to the support cylinder 13.

[0091] An external suction tube 30 communicating with the suction hole 24 is fixedly connected to the support rod 22. A second pressing valve 31 is connected to the external suction tube 30. A second pressing rod 32 for pressing the second pressing valve 31 is fixedly connected to the support cylinder 13.

[0092] The connecting flange 5 drives the support rod 22 to move downward continuously. At this time, the connecting flange 5 has been adsorbed. As the connecting flange 5 continues to move downward, in order to avoid excessive negative pressure and facilitate the downward movement of the connecting flange 5, the second pressing rod 32 presses the second pressing valve 31 to open, so as to avoid excessive pressure. At the same time, the first pressing valve 29 is closed under the action of the first pressing rod 27, ensuring that the adsorption plate 26 is in a negative pressure state.

[0093] A third press valve 28 is connected to the air intake hole 24 in the support plate 25. When the connecting flange 5 is pressed tightly against the support plate 25, the third press valve 28 is opened by the connecting flange 5, so that when the connecting flange 5 is pressed tightly against the support plate 25, the air intake hole 24 conducts the adsorption plate 26 to generate negative pressure adsorption.

[0094] A welding method for a high-frequency welding device for butterfly valve production mainly includes the following steps:

[0095] S1. The Prime Minister places the valve body 6 in the turntable 2, so that the valve body 6 is located between the two clamping rods 8;

[0096] S2. Press down on the valve body 6 with force. The valve body 6 will push down and push the rack rod 9. At this time, pushing the rack rod 9 will drive the threaded sleeve 15 to rotate through the gear 14. As a result, the threaded sleeve 15 will drive the threaded rod 23 to move outward, thereby pushing the clamping rod 8. The clamping rod 8 will initially clamp the valve body 6.

[0097] S3. While pressing down the valve body 6, also put the connecting flange 5 on the outside of the valve body 6 and press down the connecting flange 5 simultaneously.

[0098] S4. As the connecting flange 5 moves downward, it will press down the support rod 22, thereby compressing the gas in the support cylinder 13 and entering the insertion cylinder 21. At this time, the pressure in the insertion cylinder 21 increases, which will push the insertion rod 19 to move. The insertion rod 19 will be inserted into the insertion hole of the stabilizing plate 901 fixed at the lower end of the push rack rod 9, thereby further stabilizing the valve body 6 and achieving rapid clamping of the valve body 6.

[0099] S5. As the stabilizing plate 901 moves downward along with the rack and pinion 9, it will push the negative pressure rod 17 downward. The negative pressure rod 17 moves downward in the negative pressure cylinder 16, which will generate negative pressure in the upper space of the negative pressure cylinder 16. When the support rod 22 moves downward, the upper space of the support cylinder 13 will also generate negative pressure. The two are connected through the negative pressure pipe 12, so that a certain negative pressure is generated in the upper space of the support cylinder 13.

[0100] S6. The upper end of the support rod 22 is fixedly connected to the support plate 25 with the adsorption plate 26. The adsorption plate 26 is connected to the upper part of the space of the support cylinder 13 through the air suction hole 24, so that the adsorption plate 26 generates negative pressure, thereby adsorbing the support column connecting flange 5 well, so that the connecting flange 5 and the valve body 6 are stable in the turntable 2, which facilitates rapid and effective stabilization and makes it convenient for subsequent high-frequency welding.

[0101] S7. Start the high-frequency contact 4 and drive motor 7. Align the high-frequency contact 4 with the connection between the connecting flange 5 and the valve body 6. Drive motor 7 drives turntable 2 to rotate, so that the connecting flange 5 is welded to the valve body 6.

[0102] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-frequency welding device for butterfly valve production, comprising a body (1) with a high-frequency contact (4), a drive motor (7) fixedly connected to the body (1), a turntable (2) fixedly connected to the drive end of the drive motor (7), and an impedance device (3) fixedly connected to the center of the turntable (2), characterized in that, It also includes a clamping rod (8) symmetrically rotatably connected to the turntable (2) for clamping the valve body (6); A slidingly connected push rack (9) on the turntable (2) is located between the two clamping rods (8), wherein Both clamping rods (8) are connected to threaded rods (23), and the two threaded rods (23) are connected by threaded sleeves (15). The threaded sleeves (15) are rotatably connected to the turntable (2), and a gear (14) matching the push rack rod (9) is fixedly sleeved on the threaded sleeves (15). The support cylinder (13) is fixedly connected to the turntable (2); A support rod (22) with a piston is slidably connected in the support cylinder (13) for supporting the connecting flange (5); The plug-in tube (21) is fixedly connected to the turntable (2), and the lower end of the plug-in tube (21) is connected to the support tube (13) through the air supply pipe (11). A piston-equipped insert rod (19) is slidably connected in the insert sleeve (21); A stabilizing plate (901) with a socket is fixedly connected to the lower end of the push rack (9), and the plug (19) matches the socket. A negative pressure cylinder (16) is fixedly connected to the turntable (2), and a negative pressure rod (17) with a piston is slidably connected in the negative pressure cylinder (16). The negative pressure rod (17) is located below the stabilizing plate (901), and the upper end of the negative pressure cylinder (16) is connected to the upper end of the support cylinder (13) through a negative pressure pipe (12). The upper end of the support rod (22) is fixedly connected to the support plate (25), and the support plate (25) is fixedly connected to the adsorption plate (26). Both the support rod (22) and the support plate (25) are provided with air suction holes (24). The air suction holes (24) are connected to the upper end of the support cylinder (13), and the upper end of the air suction holes (24) is connected to the adsorption plate (26). A first pressing valve (29) is connected to the air intake hole (24), and a first pressing rod (27) for pressing the first pressing valve (29) is fixedly connected to the support cylinder (13); An external suction tube (30) communicating with the suction hole (24) is fixedly connected to the support rod (22), a second pressing valve (31) is connected to the external suction tube (30), and a second pressing rod (32) for pressing the second pressing valve (31) is fixedly connected to the support cylinder (13).

2. The high-frequency welding device for butterfly valve production according to claim 1, characterized in that, A first return spring (18) is connected between the negative pressure rod (17) and the bottom wall of the negative pressure cylinder (16).

3. The high-frequency welding device for butterfly valve production according to claim 1, characterized in that, A third press valve (28) is connected to the air intake hole (24) in the support plate (25). When the connecting flange (5) is pressed against the support plate (25), the connecting flange (5) presses the third press valve (28) to open.

4. The high-frequency welding device for butterfly valve production according to claim 1, characterized in that, The clamping end of the clamping rod (8) is fixedly connected to a rubber head (10).

5. The high-frequency welding device for butterfly valve production according to claim 1, characterized in that, A second return spring (20) is fitted on the insertion rod (19), and the two ends of the second return spring (20) are connected to the inner wall of the insertion rod (19) and the insertion tube (21), respectively.

6. A welding method for a high-frequency welding device for butterfly valve production as described in claim 3, characterized in that, The main steps include: S1. First, place the valve body (6) in the turntable (2) so that the valve body (6) is located between the two clamping rods (8); S2. Press down on the valve body (6) with force. The valve body (6) will push down and push the rack rod (9). At this time, pushing the rack rod (9) will drive the threaded sleeve (15) to rotate through the gear (14). As a result, the threaded sleeve (15) will drive the threaded rod (23) to move outward. The clamping rod (8) will initially clamp the valve body (6). S3. While pressing down the valve body (6), also put the connecting flange (5) on the outside of the valve body (6) and press down the connecting flange (5) simultaneously. S4. As the connecting flange (5) moves downward, it will press down the support rod (22), thereby compressing the gas in the support cylinder (13) and entering the plug cylinder (21). At this time, the pressure in the plug cylinder (21) increases, which will push the plug rod (19) to move. The plug rod (19) will be inserted into the insertion hole of the stabilizing plate (901) fixed at the lower end of the push rack rod (9). S5. As the stabilizing plate (901) moves downward along with the rack and pinion (9), it will push the negative pressure rod (17) downward. The negative pressure rod (17) moves downward in the negative pressure cylinder (16), which will generate negative pressure in the upper space of the negative pressure cylinder (16). When the support rod (22) moves downward, the upper space of the support cylinder (13) will also generate negative pressure. The two are connected through the negative pressure pipe (12), which will generate a certain negative pressure in the upper space of the support cylinder (13). S6. The upper end of the support rod (22) is fixedly connected to the support plate (25) with the adsorption plate (26). The adsorption plate (26) is connected to the upper part of the support cylinder (13) through the air suction hole (24), so that the adsorption plate (26) generates negative pressure, making the connecting flange (5) and the valve body (6) stable in the turntable (2). S7. Start the high-frequency contact (4) and drive motor (7). Align the high-frequency contact (4) with the connection between the connecting flange (5) and the valve body (6). Drive motor (7) drives turntable (2) to rotate, so that the connecting flange (5) is welded to the valve body (6).

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