Cast iron ductile iron pipe welding device with protective structure

Abstract

The invention relates to the field of welding devices, and discloses a cast iron ductile graphite pipe welding device with a protection structure, which comprises a base, a welding protection assembly is arranged in the middle of the top end of the base, the welding protection assembly comprises a supporting table fixedly mounted in the middle of the top end of the base, and a protection cylinder is fixedly mounted at the top end of the supporting table. A top groove is formed in the top end of the protection barrel, a top frame is fixedly installed at the top end of the protection barrel, a welding gun is arranged on the inner side of the top frame and located above the top groove, an air cylinder is fixedly installed at the top end of the top frame, the output end of the air cylinder is connected with the welding gun through a bolt, and pipeline clamping assemblies are arranged at the two ends of the protection barrel. The gap between the ends, needing to be welded, of the two cast iron nodular graphite pipes is located on the inner side of the protection barrel, meanwhile, a welding gun penetrates through the top groove from top to bottom to enter the protection barrel for welding, welding of the cast iron nodular graphite pipes is completed in the protection barrel, welding protection is achieved, and welding safety is improved.

Description

Technical Field

[0001] This invention belongs to the field of welding equipment, specifically a welding device for cast iron ductile iron tubes with a protective structure. Background Technology

[0002] Due to their high strength, high toughness, corrosion resistance, and impact resistance, cast iron ductile iron pipes are widely used in major infrastructure projects such as municipal water supply, drainage, gas transmission, and industrial pipeline networks. Welding, as the core process for connecting cast iron ductile iron pipes, directly determines the sealing performance, load-bearing capacity, and service life of the pipeline network. Safety precautions during the welding process are essential to ensuring the personal safety of operators, the integrity of surrounding equipment, and compliance with working environment standards.

[0003] Currently, most existing cast iron ductile iron pipe welding operations use manual electric arc welding or semi-automatic gas shielded welding, and the supporting welding equipment is mostly simple tooling. During the welding process, welding slag is prone to splashing, which may cause injury to surrounding workers, indicating a lack of protection. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a cast iron ductile iron tube welding device with a protective structure, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding device for cast iron ductile iron tubes with a protective structure, comprising a base, wherein a welding protection component is provided at the top center of the base; The welding protection assembly includes a support platform fixedly installed at the top center of the base, a protective cylinder fixedly installed at the top of the support platform, a top groove opened at the top of the protective cylinder, a top frame fixedly installed at the top of the protective cylinder, a welding gun arranged inside the top frame, the welding gun being located above the top groove, a cylinder fixedly installed at the top of the top frame, the output end of the cylinder being bolted to the welding gun, and pipe clamping assemblies arranged at both ends of the protective cylinder.

[0006] Preferably, the pipe clamping assembly includes sliding platforms symmetrically arranged on both sides of the protective cylinder, a centering clamping component is installed at the top of the sliding platform, and a rotation linkage component is provided on the sliding platform; The bottom of the sliding table is fixedly installed with a sliding seat. A sliding groove is opened on the base. Two sliding seats are slidably installed inside the sliding groove. A double-ended screw is rotatably installed inside the sliding groove. The two sliding seats are threadedly connected to the threaded grooves with opposite directions on the double-ended screw. One end of the double-ended screw is fixedly connected to the output shaft of the first motor.

[0007] Preferably, the centering clamping component includes a fixed cylinder fixedly installed on the top of the sliding table, two fixed cylinders symmetrically arranged on both sides of the protective cylinder, and the fixed cylinder and the protective cylinder are coaxially arranged. An end sleeve is rotatably installed on the end of the fixed cylinder near the protective cylinder, and a clamping rod is slidably installed on the end sleeve at equal angles. A clamping block is fixedly installed on the end of the clamping rod near the axis of the end sleeve.

[0008] Preferably, a circumferential rotating sleeve is rotatably mounted on the fixed cylinder in the circumferential direction. The circumferential rotating sleeve has a sliding groove at equal angles in the axial direction. A sliding plate is slidably mounted on the sliding groove. The sliding plate corresponds to the clamping rod one by one. A connecting rod is hinged to one end of the sliding plate near the clamping rod. One end of the connecting rod is hinged to one end of the clamping rod located outside the end rotating sleeve.

[0009] Preferably, a spring is fixedly installed on the side of the slide plate near the end sleeve, one end of the spring is fixedly connected to the inner wall of the end of the slide groove, a magnetic block is installed on the slide plate, and an electromagnet is fixedly installed on the inner wall of the end of the slide groove away from the end sleeve.

[0010] Preferably, a connecting ring is fitted on the outer side of the circumferential rotating sleeve, the connecting ring is fixedly connected to each slide plate, and a toothed ring is fixedly installed on the end of the circumferential rotating sleeve away from the end rotating sleeve.

[0011] Preferably, the rotating linkage includes a side rotating shaft rotatably mounted on the sliding table, and a first gear is fixedly mounted on one end of the side rotating shaft near the protective cylinder. The first gear is located below the gear ring and is meshed with the gear ring.

[0012] Preferably, a limiting cylinder is coaxially fixedly installed on the side of the first gear near the protective cylinder. A limiting groove is opened inside the limiting cylinder, and a guide groove is opened at an equal angle on the outside of the limiting groove. A synchronous rotation component is provided between the two limiting cylinders.

[0013] Preferably, the synchronous rotation assembly includes a central rotating shaft coaxially disposed between two limiting cylinders, the central rotating shaft being rotatably connected to the support platform, end shafts symmetrically installed at both ends of the central rotating shaft, the two end shafts being respectively inserted into two limiting grooves, guide blocks being installed at equal angles on the circumference of the end shafts, the guide blocks being slidably connected to the guide grooves, a second gear being coaxially mounted on the central rotating shaft, a third gear being meshed below the second gear, the third gear being fixedly connected to the output shaft of the second motor, and the second motor being mounted on the base.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention involves placing the gap between the ends of two cast iron ductile iron tubes to be welded inside a protective cylinder, while simultaneously allowing the welding torch to pass through the top groove and enter the protective cylinder from top to bottom for welding. This ensures that the welding of the cast iron ductile iron tubes is completed inside the protective cylinder, achieving welding protection and improving welding safety. This invention, by setting the fixed cylinder and the protective cylinder coaxially, allows four clamping blocks to center and hold the cast iron ductile iron tubes. When the end faces of the two cast iron ductile iron tubes are in contact, the cast iron ductile iron tubes and the protective cylinder are set coaxially. When the two circumferential rotating sleeves rotate, they drive the two cast iron ductile iron tubes to rotate synchronously, so that the welding gun can weld along the annular gap between the end faces of the two cast iron ductile iron tubes, which facilitates welding. In this invention, the end shafts at both ends of the central rotating shaft are respectively inserted into the limiting grooves in the two limiting cylinders, and the guide block is slidably connected to the guide groove. This allows the central rotating shaft to be driven to rotate synchronously, which in turn drives the two circumferential rotating sleeves to rotate synchronously, and then drives the two cast iron ductile iron tubes to rotate synchronously, ensuring the stability of rotational welding. Moreover, the end shafts can remain in the limiting grooves during the movement of the sliding table, which facilitates the welding of cast iron ductile iron tubes of different lengths. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0016] In the attached diagram: Figure 1 This is a schematic diagram of the welding device for cast iron ductile iron tubes with a protective structure according to the present invention. Figure 2 This is a schematic diagram of the welding protection component structure of the present invention; Figure 3 This is a schematic diagram of the centering clamping component structure of the present invention; Figure 4 This is a schematic diagram of the fixed cylinder structure of the present invention; Figure 5 This is a schematic diagram of the rotating linkage structure of the present invention; Figure 6 This is a schematic diagram of the synchronous rotation component structure of the present invention; In the diagram: 1. Base; 2. Welding protection assembly; 201. Support platform; 202. Protective cylinder; 203. Top groove; 204. Top frame; 205. Welding gun; 206. Cylinder; 3. Pipe clamping assembly; 301. Sliding table; 302. Slide block; 303. Sliding groove; 304. Double-ended screw; 305. First motor; 306. Centering clamp; 3061. Fixed cylinder; 3062. End sleeve; 3063. Clamping rod; 3064. Clamping block; 3065. Circumferential sleeve; 3066. Sliding groove; 3 067, Slide plate; 3068, Connecting rod; 3069, Connecting ring; 30610, Spring; 30611, Magnetic block; 30612, Electromagnet; 30613, Gear ring; 307, Rotation linkage component; 3071, Side rotating shaft; 3072, First gear; 3073, Limiting cylinder; 3074, Limiting groove; 3075, Guide groove; 4, Synchronous rotation assembly; 401, Middle rotating shaft; 402, End shaft; 403, Guide block; 404, Second gear; 405, Third gear; 406, Second motor. Detailed Implementation

[0017] 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. 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.

[0018] Example 1, by Figures 1-6 The present invention relates to a welding device for cast iron ductile iron tubes with a protective structure, comprising a base 1, wherein a welding protective component 2 is disposed at the top center of the base 1.

[0019] The welding protection assembly 2 includes a support platform 201 fixedly installed at the top center of the base 1. A protective cylinder 202 is fixedly installed at the top of the support platform 201. A top groove 203 is opened at the top of the protective cylinder 202. A top frame 204 is fixedly installed at the top of the protective cylinder 202. A welding gun 205 is arranged inside the top frame 204. The welding gun 205 is located above the top groove 203. The gap between the ends of the two cast iron ductile iron tubes to be welded is located inside the protective cylinder 202. At the same time, the welding gun 205 passes through the top groove 203 from top to bottom and enters the protective cylinder 202 to perform welding, so that the welding of the cast iron ductile iron tubes is completed inside the protective cylinder 202, thereby achieving welding protection and improving welding safety. A cylinder 206 is fixedly installed at the top of the top frame 204. The output end of the cylinder 206 is bolted to the welding gun 205. Pipe clamping assemblies 3 are arranged at both ends of the protective cylinder 202.

[0020] The pipe clamping assembly 3 includes sliding platforms 301 symmetrically arranged on both sides of the protective cylinder 202. A centering clamping component 306 is installed at the top of the sliding platform 301. A rotating linkage component 307 is provided on the sliding platform 301. A slide seat 302 is fixedly installed at the bottom of the sliding platform 301. A sliding groove 303 is provided on the base 1. Two slide seats 302 are slidably installed inside the sliding groove 303. A double-ended screw 304 is rotatably installed inside the sliding groove 303. The two slide seats 302 are threadedly connected to the threaded grooves with opposite directions on the double-ended screw 304. One end of the double-ended screw 304 is fixedly connected to the output shaft of the first motor 305.

[0021] The centering clamping component 306 includes a fixed cylinder 3061 fixedly installed on the top of the sliding table 301. Two fixed cylinders 3061 are symmetrically arranged on both sides of the protective cylinder 202, and the fixed cylinders 3061 and the protective cylinder 202 are coaxially arranged. An end sleeve 3062 is rotatably installed on the end of the fixed cylinder 3061 near the protective cylinder 202. A clamping rod 3063 is slidably installed on the end sleeve 3062 at equal angles. A clamping block 30 is fixedly installed on the end of the clamping rod 3063 near the axis of the end sleeve 3062. 64. A circumferential rotating sleeve 3065 is rotatably mounted on the fixed cylinder 3061. A sliding groove 3066 is formed at equal angles along the axial direction of the circumferential rotating sleeve 3065. A sliding plate 3067 is slidably mounted on the sliding groove 3066. The sliding plate 3067 corresponds one-to-one with the clamping rod 3063. A connecting rod 3068 is hinged to one end of the sliding plate 3067 near the clamping rod 3063. One end of the connecting rod 3068 is hinged to the end of the clamping rod 3063 located outside the end rotating sleeve 3062. The sliding plate 3067... A spring 30610 is fixedly installed on one side of the near-end rotating sleeve 3062. One end of the spring 30610 is fixedly connected to the inner wall of the end of the slide groove 3066. A magnet 30611 is installed on the slide plate 3067. An electromagnet 30612 is fixedly installed on the inner wall of the end of the slide groove 3066 away from the end rotating sleeve 3062. A connecting ring 3069 is sleeved on the outer side of the circumferential rotating sleeve 3065. The connecting ring 3069 is fixedly connected to each slide plate 3067. The circumferential rotating sleeve 3065 is located away from the end... A toothed ring 30613 is fixedly installed at one end of the rotating sleeve 3062. The fixed cylinder 3061 and the protective cylinder 202 are coaxially arranged. The four clamping blocks 3064 can center and clamp the cast iron ductile iron tubes so that when the end faces of the two cast iron ductile iron tubes are in contact, the cast iron ductile iron tubes and the protective cylinder 202 are coaxially arranged so that when the two circumferential rotating sleeves 3065 rotate, they drive the two cast iron ductile iron tubes to rotate synchronously, so that the welding gun 205 can weld along the annular gap between the end faces of the two cast iron ductile iron tubes, which facilitates welding.

[0022] The rotating linkage 307 includes a side rotating shaft 3071 rotatably mounted on the sliding table 301. A first gear 3072 is fixedly mounted on one end of the side rotating shaft 3071 near the protective cylinder 202. The first gear 3072 is located below the gear ring 30613 and is meshed with the gear ring 30613. A limiting cylinder 3073 is coaxially fixedly mounted on the side of the first gear 3072 near the protective cylinder 202. A limiting groove 3074 is opened inside the limiting cylinder 3073. A guide groove 3075 is opened at equal angles on the outer side of the limiting groove 3074. A synchronous rotation assembly 4 is provided between the two limiting cylinders 3073.

[0023] The synchronous rotation assembly 4 includes a central rotating shaft 401 coaxially disposed between two limiting cylinders 3073. The central rotating shaft 401 is rotatably connected to the support platform 201. End shafts 402 are symmetrically mounted at both ends of the central rotating shaft 401. The two end shafts 402 are respectively inserted into two limiting grooves 3074. Guide blocks 403 are mounted at equal angles along the circumference of the end shafts 402. The guide blocks 403 are slidably connected to the guide grooves 3075. A second gear 404 is coaxially mounted on the central rotating shaft 401. A third gear 405 is meshed below the second gear 404. The third gear 405 is connected to the second motor 4074. The output shaft of motor 6 is fixedly connected. The second motor 406 is mounted on the base 1. The end shafts 402 at both ends of the central rotating shaft 401 are respectively inserted into the limiting grooves 3074 in the two limiting cylinders 3073. The guide block 403 is slidably connected to the guide groove 3075, so that when the central rotating shaft 401 is driven to rotate, it can synchronously drive the two circumferential rotating sleeves 3065 to rotate synchronously, and then synchronously drive the two cast iron ductile iron tubes to rotate, ensuring the stability of rotation welding. The end shafts 402 can remain in the limiting grooves 3074 during the movement of the sliding table 301, which is convenient for welding cast iron ductile iron tubes of different lengths.

[0024] Working principle: When in use, the two cast iron ductile iron tubes that need to be extended by end welding are respectively installed inside the two fixed cylinders 3061. During installation, the cast iron ductile iron tubes are inserted into the inside of the fixed cylinder 3061, and the distance between the two cast iron ductile iron tubes and the end of the protective cylinder 202 is the same. Then, the electromagnet 30612 is energized to generate a repulsive force on the magnetic block 30611. Under the action of the repulsive force, the sliding plate 3067 is pushed to move synchronously towards the protective cylinder 202. Then, the connecting rod 3068 pushes each clamping rod 3063 to move synchronously towards the cast iron ductile iron tube, so that each clamping block 3064 centers and clamps the cast iron ductile iron tube. The first motor 305 is turned on, driving the double-ended screw 304 to rotate. Since the two slides 302 are respectively connected to the two threaded grooves with opposite directions on the double-ended screw 304, the two fixed cylinders 3061 are driven to move closer to each other, so that the ends of the two cast iron ductile iron tubes are tightly attached to the inside of the protective cylinder 202, and the cast iron ductile iron tubes and the protective cylinder 202 are coaxially arranged. The welding gap between the end faces of the two cast iron ductile iron tubes is located in the middle of the protective cylinder 202. Then, the cylinder 206 is opened to drive the welding gun 205 to move downward, so that the welding gun 205 enters the inner side of the protective cylinder 202 from the top groove 203, so that the welding end of the welding gun 205 contacts the end face of the two cast iron ductile iron tubes that need to be welded. Then, the welding gun 205 is opened to weld the welding gap. Simultaneously, the second motor 406 is activated, driving the third gear 405 to rotate. This, in turn, drives the central rotating shaft 401 to rotate via the second gear 404. Since the end shafts 402 at both ends of the central rotating shaft 401 are respectively inserted into the limiting grooves 3074 in the two limiting cylinders 3073, and the guide block 403 is slidably connected to the guide groove 3075, the central rotating shaft 401 rotates, driving the first gear 3072 to rotate. The first gear 3072 meshes with the gear ring 30613, thereby driving the two circumferential rotating sleeves 3065 to rotate synchronously, which in turn drives the two cast iron ductile iron tubes to rotate synchronously, ensuring the welding stability of the end faces of the two cast iron ductile iron tubes.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding device for cast iron ductile iron tubes with a protective structure, comprising a base (1), characterized in that: A welding protection component (2) is provided at the top center of the base (1). The welding protection assembly (2) includes a support platform (201) fixedly installed at the top center of the base (1). A protective cylinder (202) is fixedly installed at the top of the support platform (201). A top groove (203) is opened at the top of the protective cylinder (202). A top frame (204) is fixedly installed at the top of the protective cylinder (202). A welding gun (205) is provided inside the top frame (204). The welding gun (205) is located above the top groove (203). A cylinder (206) is fixedly installed at the top of the top frame (204). The output end of the cylinder (206) is bolted to the welding gun (205). Pipe clamping assemblies (3) are provided at both ends of the protective cylinder (202).

2. The welding device for cast iron ductile iron tubes with a protective structure according to claim 1, characterized in that: The pipe clamping assembly (3) includes sliding tables (301) symmetrically arranged on both sides of the protective cylinder (202), a centering clamping component (306) is installed on the top of the sliding table (301), and a rotation linkage component (307) is provided on the sliding table (301). A slide block (302) is fixedly installed at the bottom of the sliding table (301). A sliding groove (303) is provided on the base (1). Two slide blocks (302) are slidably installed inside the sliding groove (303). A double-ended screw (304) is rotatably installed inside the sliding groove (303). The two slide blocks (302) are threadedly connected to the threaded grooves with opposite directions on the double-ended screw (304). One end of the double-ended screw (304) is fixedly connected to the output shaft of the first motor (305).

3. The welding device for cast iron ductile iron tubes with a protective structure according to claim 2, characterized in that: The centering clamp (306) includes a fixed cylinder (3061) fixedly installed on the top of the sliding table (301). Two fixed cylinders (3061) are symmetrically arranged on both sides of the protective cylinder (202), and the fixed cylinder (3061) and the protective cylinder (202) are coaxially arranged. An end sleeve (3062) is rotatably installed on one end of the fixed cylinder (3061) near the protective cylinder (202). A clamping rod (3063) is slidably installed on the end sleeve (3062) at equal angles. A clamping block (3064) is fixedly installed on one end of the clamping rod (3063) near the axis of the end sleeve (3062).

4. The welding device for cast iron ductile iron tubes with a protective structure according to claim 3, characterized in that: The fixed cylinder (3061) is rotatably mounted with a circumferential rotating sleeve (3065). The circumferential rotating sleeve (3065) is provided with a sliding groove (3066) at equal angles in the axial direction. A sliding plate (3067) is slidably mounted on the sliding groove (3066). The sliding plate (3067) corresponds one-to-one with the clamping rod (3063). A connecting rod (3068) is hinged to one end of the sliding plate (3067) near the clamping rod (3063). One end of the connecting rod (3068) is hinged to one end of the clamping rod (3063) located outside the end rotating sleeve (3062).

5. The welding device for cast iron ductile iron tubes with a protective structure according to claim 4, characterized in that: A spring (30610) is fixedly installed on the side of the slide plate (3067) near the end sleeve (3062). One end of the spring (30610) is fixedly connected to the inner wall of the end of the slide groove (3066). A magnet (30611) is installed on the slide plate (3067). An electromagnet (30612) is fixedly installed on the inner wall of the end of the slide groove (3066) away from the end sleeve (3062).

6. The welding device for cast iron ductile iron tubes with a protective structure according to claim 4, characterized in that: The outer side of the circumferential rotating sleeve (3065) is fitted with a connecting ring (3069), which is fixedly connected to each slide plate (3067). A toothed ring (30613) is fixedly installed at the end of the circumferential rotating sleeve (3065) away from the end rotating sleeve (3062).

7. The welding device for cast iron ductile iron tubes with a protective structure according to claim 2, characterized in that: The rotating linkage (307) includes a side rotating shaft (3071) rotatably mounted on the sliding table (301). A first gear (3072) is fixedly mounted on one end of the side rotating shaft (3071) near the protective cylinder (202). The first gear (3072) is located below the gear ring (30613), and the first gear (3072) meshes with the gear ring (30613).

8. The welding device for cast iron ductile iron tubes with a protective structure according to claim 7, characterized in that: The first gear (3072) is coaxially fixedly installed with a limiting cylinder (3073) on the side near the protective cylinder (202). A limiting groove (3074) is opened inside the limiting cylinder (3073), and a guide groove (3075) is opened at equal angles on the outside of the limiting groove (3074). A synchronous rotation assembly (4) is provided between the two limiting cylinders (3073).

9. The welding device for cast iron ductile iron tubes with a protective structure according to claim 8, characterized in that: The synchronous rotation assembly (4) includes a central rotating shaft (401) coaxially disposed between two limiting cylinders (3073). The central rotating shaft (401) is rotatably connected to the support platform (201). End shafts (402) are symmetrically installed at both ends of the central rotating shaft (401). The two end shafts (402) are respectively inserted into two limiting grooves (3074). Guide blocks (403) are installed at equal angles in the circumferential direction of the end shafts (402). The guide blocks (403) are slidably connected to the guide grooves (3075). A second gear (404) is coaxially installed on the central rotating shaft (401). A third gear (405) is meshed below the second gear (404). The third gear (405) is fixedly connected to the output shaft of the second motor (406). The second motor (406) is installed on the base (1).

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