A ductile cast iron pipe fitting heat treatment equipment

Abstract

The utility model relates to the technical field of pipe fitting heat treatment, specifically relates to a nodular cast iron pipe fitting heat treatment equipment, including the nut seat that has the screw thread screwing connection on the one end of screw rod, and the bottom of nut seat is fixedly connected with the flame spraying head through bolt, the outer wall one side of frame body is fixedly connected with drive motor through bolt, and the one end of screw rod is driven motor output shaft transmission connection with the side wall of frame body and is penetrated. Make the flame spraying head can move along the pipe fitting length direction in the heating process, improved the uniformity of heating significantly, avoided the problem that the organization transformation was not consistent because of local overheating or underheating, thereby promoted the overall mechanical property and structural stability of material, second, the bearing plate is driven to slide and is matched with the bearing sleeve and is clamped nodular cast iron pipe fitting through the cylinder, solved the problem that the traditional equipment was difficult to adapt to different specifications pipe fitting clamping, strengthened the versatility and applicability of equipment, met the demand of large quantities, many varieties production.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment technology for pipe fittings, and in particular to a heat treatment equipment for ductile iron pipe fittings. Background Technology

[0002] Ductile iron pipe fittings are a high-strength cast iron material obtained through spheroidizing and inoculation treatment. The graphite inside is distributed in a spherical pattern, resulting in excellent mechanical properties, corrosion resistance, and ductility. They are widely used in underground pipe networks for urban water supply, drainage, and gas supply. To further improve their mechanical properties and structural stability, ductile iron pipe fittings typically undergo heat treatment processes such as annealing, normalizing, quenching, and tempering. Heat treatment is a crucial step in the manufacturing process of ductile iron pipe fittings, and its quality directly affects the final performance and service life of the product.

[0003] However, in actual production processes, especially in the core process of heating and cooling ductile iron pipe fittings in heat treatment equipment, existing heat treatment equipment has gradually revealed a series of obvious limitations and technical problems when processing ductile iron pipe fittings of specific shapes and sizes. Specifically, the utility model patent CN209307422U discloses a mobile heat treatment device, which improves operational flexibility to some extent.

[0004] However, uneven heating is a problem when heat-treating ductile iron pipe fittings. Because ductile iron pipe fittings are typically annular or irregularly shaped, and have large volumes and uneven wall thicknesses, traditional equipment struggles to achieve uniform heating across all parts, leading to localized excessively high or low temperatures, thus affecting the overall heat treatment effect. This uneven heating not only causes inconsistent material transformation, reducing the mechanical strength and toughness of the pipe fittings, but may also induce internal stress concentration, resulting in defects such as cracks and deformation. Therefore, given the many shortcomings of existing technologies, we urgently need an innovative heat treatment equipment for ductile iron pipe fittings to solve these problems. Utility Model Content

[0005] The purpose of this utility model is to provide a heat treatment equipment for ductile iron pipe fittings, which solves the problem of uneven heating in the existing technology when heat treating ductile iron pipe fittings.

[0006] To achieve the above objectives, this utility model provides a heat treatment equipment for ductile iron pipe fittings, including a frame, a bearing plate slidably connected to one side of the inner side of the frame, and a screw rotatably connected to the upper inner side of the frame.

[0007] A nut seat is threadedly connected to one end of the screw, and a flame head is fixedly connected to the bottom of the nut seat by bolts. A drive motor is fixedly connected to one side of the outer wall of the frame by bolts, and one end of the screw passes through the side wall of the frame and is connected to the output shaft of the drive motor. A cylinder is fixedly connected to one side of the outer wall of the frame by bolts, and the output shaft of the cylinder passes through the side wall of the frame and is fixedly connected to one side of the support plate. Several support sleeves are fixedly connected to one side of the inner wall of the frame, and the bottom of the inner side of all the support sleeves is in the same horizontal direction as one side of the support plate.

[0008] The frame has a support plate that slides on one side of its inner side, and the top of the support plate is fixedly connected to several arc-shaped plates.

[0009] The bottom of the support plate is fixedly connected to several wheels, and the bottom of all the wheels is in contact with the inner bottom of the frame. A handle is fixedly connected to one side of the support plate.

[0010] One side of the support plate is fixedly connected to a sliding block, and the sliding block is slidably connected to the side wall of the frame through a sliding groove.

[0011] One side of the support plate is fixedly connected to a slider, and the slider is slidably connected to the side wall of the frame through a groove.

[0012] The frame has a sliding rod fixedly connected to one side of the inner side, and a sliding sleeve is fitted on one end of the sliding rod. One side of the sliding sleeve is fixedly connected to one side of the nut seat. One end of the screw is rotatably connected to the inner wall of the frame through a rotating shaft, and the other end of the screw passes through the side wall of the frame through a bearing sleeve.

[0013] This utility model discloses a heat treatment equipment for ductile iron pipe fittings. By incorporating a movable burner head in conjunction with a drive motor and a transmission structure consisting of a screw and nut seat, the burner head can move along the length of the pipe fitting during heating, significantly improving heating uniformity and preventing inconsistent microstructure transformation caused by localized overheating or underheating. This enhances the overall mechanical properties and structural stability of the material. Secondly, by using a cylinder to drive a sliding bearing plate that engages with a bearing sleeve to clamp the ductile iron pipe fitting, the equipment overcomes the limitations of traditional equipment in accommodating different pipe fitting specifications, enhancing its versatility and applicability to meet the demands of large-scale, multi-variety production. Thirdly, this structural design simplifies the operation process, reduces manual intervention, improves heat treatment efficiency, and reduces labor intensity and operational complexity. Furthermore, the improved heating uniformity effectively reduces defects such as cracks and deformation caused by thermal stress concentration, lowering the scrap rate and increasing the product qualification rate, further ensuring the safety and reliability of the ductile iron pipe fittings during long-term use. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall main view structure of an embodiment of this utility model.

[0016] Figure 2 This is a top view of an embodiment of the present invention.

[0017] Figure 3 This is a side view structural diagram of an embodiment of the present utility model.

[0018] Figure 4 This is a schematic diagram of the inner structure of the frame in an embodiment of this utility model.

[0019] Figure 5 This is a schematic diagram of the support plate and its structure according to an embodiment of the present utility model.

[0020] 1. Frame; 2. Screw; 3. Nut seat; 4. Sliding sleeve; 5. Sliding rod; 6. Drive motor; 7. Bearing plate; 8. Cylinder; 9. Bearing sleeve; 10. Slide groove; 11. Support plate; 12. Wheel; 13. Handle; 14. Flame head; 15. Arc plate; 16. Slider; 17. Sliding block. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] Please see Figure 1-5 A heat treatment device for ductile iron pipe fittings includes a frame 1, a bearing plate 7 slidably connected to one side of the inner side of the frame 1, and a screw 2 rotatably connected to the upper inner side of the frame 1; a nut seat 3 is threadedly connected to one end of the screw 2, and a flame head 14 is bolted to the bottom of the nut seat 3; a drive motor 6 is bolted to one side of the outer wall of the frame 1, and one end of the screw 2 passes through the side wall of the frame 1 and is connected to the output shaft of the drive motor 6; a cylinder 8 is bolted to one side of the outer wall of the frame 1, and the output shaft of the cylinder 8 passes through the side wall of the frame 1 and is fixedly connected to one side of the bearing plate 7; and several bearing sleeves 9 are fixedly connected to one side of the inner wall of the frame 1, with the bottom of the inner side of all the bearing sleeves 9 and one side of the bearing plate 7 located in the same horizontal direction.

[0023] First, the ductile iron pipe fittings to be heat-treated are placed sequentially between multiple bearing sleeves 9 and slidingly connected bearing plates 7 inside the frame 1. By activating the cylinder 8, its output shaft pushes the bearing plates 7 to slide along the inner side of the frame 1, thereby clamping and fixing the ductile iron pipe fittings of different sizes. After the ductile iron pipe fittings are stably fixed, the burner head 14 is activated to begin heating the surface of the pipe fittings. At the same time, the drive motor 6 is connected to the screw 2 through its output shaft, driving the screw 2 to rotate inside the frame 1. The nut seat 3 is threadedly connected to the screw 2 and moves axially along the screw 2 under its rotation, thereby driving the burner head 14 to reciprocate along the length of the ductile iron pipe fitting to spray fire, ensuring uniform temperature distribution during the heating process. Throughout the heating process, the burner head 14 can cover all parts of the ductile iron pipe fitting, especially for its annular or irregular structure and uneven wall thickness, achieving a more comprehensive and uniform heating effect and effectively improving the heat treatment quality.

[0024] Furthermore, a support plate 11 is slidably connected to one side of the inner side of the frame 1, and several arc-shaped plates 15 are fixedly connected to the top of the support plate 11. The multiple arc-shaped plates 15 fixedly connected to the top of the support plate 11 can provide auxiliary support when the ductile iron pipe fitting is placed, especially suitable for supporting the middle or weak parts of the pipe fitting, preventing deformation caused by gravity during the heating process. After the operator places the pipe fitting between the bearing sleeve 9 and the bearing plate 7, the position of the support plate 11 can be adjusted as needed to make the arc-shaped plates 15 fit the outer wall of the pipe fitting, thereby improving the stability and safety during the heat treatment process and achieving the effect of enhancing the equipment's adaptability to pipe fittings of different specifications and shapes.

[0025] Furthermore, several wheels 12 are fixedly connected to the bottom of the support plate 11, and the bottom of all the wheels 12 is in contact with the inner bottom of the frame 1. A handle 13 is fixedly connected to one side of the support plate 11. The wheels 12 serve as rolling components when the support plate 11 moves, making the support plate 11 slide more smoothly inside the frame 1 and reducing the operating resistance when manually pushing the handle 13 for adjustment. At the same time, the design of the handle 13 further improves the operability and convenience of the equipment, achieving the effect of improving the ease of use and work efficiency of the equipment.

[0026] Furthermore, a sliding block 17 is fixedly connected to one side of the support plate 11, and the sliding block 17 is slidably connected to the side wall of the frame 1 through the slide groove 10. When the support plate 11 moves along the bottom of the frame 1, the sliding block 17 moves along the slide groove 10, which plays a guiding and limiting role, ensuring that the support plate 11 remains stable during movement and avoiding deviation or shaking, thereby improving the stability and positioning accuracy of the support structure.

[0027] Furthermore, a slider 16 is fixedly connected to one side of the bearing plate 7, and the slider 16 is slidably connected to the side wall of the frame 1 through the slide groove 10, so that the bearing plate 7 has good guidance and stability when it slides along the inner side of the frame 1 under the drive of the cylinder 8; the cooperation between the slider 16 and the slide groove 10 effectively prevents the bearing plate 7 from tilting or getting stuck during the movement, thereby ensuring the reliability and consistency of the clamping action of the ductile iron pipe fitting, and achieving the effect of improving the operating stability and clamping accuracy of the clamping mechanism.

[0028] Furthermore, a sliding rod 5 is fixedly connected to one side of the inner side of the frame 1, and a sliding sleeve 4 is fitted on one end of the sliding rod 5. One side of the sliding sleeve 4 is fixedly connected to one side of the nut seat 3. One end of the screw 2 is rotatably connected to the inner wall of the frame 1 through a rotating shaft, and the other end of the screw 2 passes through the side wall of the frame 1 through a bearing sleeve. The sliding rod 5 is fixed inside the frame 1, and the sliding sleeve 4 is fitted on the sliding rod 5 and fixedly connected to one side of the nut seat 3. When the nut seat 3 moves with the screw 2, the sliding sleeve 4 slides along the sliding rod 5, playing an auxiliary guiding and supporting role. This structure enhances the stability of the flame head 14 during movement, avoids the shaking or deviation caused by single-point transmission, and ensures that the flame head 14 is always in a stable state during movement, thereby improving the heating uniformity and the reliability of equipment operation.

[0029] In summary:

[0030] During use, the ductile iron pipe fittings requiring heat treatment are first placed sequentially between multiple bearing sleeves 9 and the slidingly connected bearing plate 7 inside the frame 1. The operator can then push the support plate 11 using the handle 13, causing the wheel 12 fixed at the bottom of the support plate 11 to roll along the inner bottom of the frame 1. The sliding block 17 fixed to one side of the support plate 11 slides in the groove 10 for guidance and limiting, thus flexibly adjusting the position of the support plate 11. Once the support plate 11 is in place, the arc-shaped plate 15 fixed at the top of the support plate 11 fits against the outer wall of the ductile iron pipe fitting, providing auxiliary support for its central or structurally weak parts and preventing deformation due to gravity during heating. Subsequently, the cylinder 8 is activated, and its output shaft pushes the bearing plate 7 to slide along the inner side of the frame 1. The slider 16 fixed to one side of the bearing plate 7 slides in the groove 10, ensuring the bearing plate... 7. Stable and non-deviation-free operation enables clamping and fixing of ductile iron pipe fittings of different sizes. After clamping, the burner head 14 is activated to heat the surface of the ductile iron pipe fitting. At the same time, the drive motor 6 is connected to the screw 2 through its output shaft, driving the screw 2 to rotate within the frame 1. The nut seat 3 is threadedly connected to the screw 2 and moves axially along the screw 2 under its rotation. Meanwhile, one side of the nut seat 3 cooperates with the slide rod 5 fixed on the frame 1 through the sliding sleeve 4, which plays an auxiliary guiding and supporting role, ensuring that the burner head 14 moves smoothly and without shaking. The burner head 14 moves back and forth along the length of the ductile iron pipe fitting with the nut seat 3, covering all parts. Especially for its annular or irregular structure and uneven wall thickness, it achieves a more comprehensive and uniform heating effect, effectively improving the heat treatment quality.Through the cooperation between the frame 1, bearing plate 7, bearing sleeve 9, cylinder 8, and slider 16, rapid clamping and fixing of ductile iron pipe fittings of different specifications is achieved, enhancing the versatility and applicability of the equipment and solving the problem that traditional equipment is difficult to adapt to multiple specifications, thus improving production efficiency and reducing manual labor intensity. Secondly, through the cooperation between the flame head 14, nut seat 3, screw 2, drive motor 6, slide rod 5, and slide sleeve 4, the flame head 14 can move smoothly along the length of the pipe fitting during heating, significantly improving heating uniformity and avoiding inconsistent microstructure transformation caused by local overheating or underheating, thereby improving the overall mechanical properties and structural stability of the material. Thirdly, through the support plate 11, arc plate 15, wheel 12, and other components, rapid clamping and fixing of ductile iron pipe fittings of different specifications is achieved, enhancing the equipment's versatility and applicability, solving the problem that traditional equipment is difficult to adapt to multiple specifications, and achieving the effect of improving production efficiency and reducing manual labor intensity. The fit between handle 13, sliding block 17, and slide groove 10 provides effective auxiliary support during the heating process of ductile iron pipe fittings, preventing deformation caused by gravity, improving stability and safety during heat treatment, and enhancing the ease of operation and adjustment flexibility of the equipment. Furthermore, the fit between slider 16 and slide groove 10 further ensures the guiding accuracy and operational stability of the bearing plate 7 during clamping, preventing tilting or jamming during clamping, thus guaranteeing the reliability and consistency of the clamping action. Finally, the configuration of slide rod 5 and sliding sleeve 4 provides a double guiding support structure for the movement of the flame head 14, effectively preventing wobbling or deviation of the flame head 14 during movement, further improving heating uniformity and equipment operational reliability.

[0031] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A heat treatment device for ductile iron pipe fittings, comprising a frame, characterized in that, It also includes a bearing plate that is slidably connected to one side of the inner side of the frame, and a screw that is rotatably connected to the upper inner side of the frame; One end of the screw is connected to a nut seat by a threaded connection, and the bottom of the nut seat is fixedly connected to a flame head by a bolt. A drive motor is fixedly connected to one side of the outer wall of the frame by a bolt, and one end of the screw passes through the side wall of the frame and is connected to the output shaft of the drive motor for transmission. A cylinder is fixedly connected to one side of the outer wall of the frame by a bolt, and the output shaft of the cylinder passes through the side wall of the frame and is fixedly connected to one side of the support plate. Several support sleeves are fixedly connected to one side of the inner wall of the frame, and the bottom of the inner side of all the support sleeves is in the same horizontal direction as one side of the support plate.

2. The heat treatment equipment for ductile iron pipe fittings as described in claim 1, characterized in that, A support plate is slidably connected to one side of the inner side of the frame, and several arc-shaped plates are fixedly connected to the top of the support plate.

3. The heat treatment equipment for ductile iron pipe fittings as described in claim 2, characterized in that, The bottom of the support plate is fixedly connected to several wheels, and the bottom of all the wheels is in contact with the inner bottom of the frame. A handle is fixedly connected to one side of the support plate.

4. The heat treatment equipment for ductile iron pipe fittings as described in claim 3, characterized in that, A sliding block is fixedly connected to one side of the support plate, and the sliding block is slidably connected to the side wall of the frame through a sliding groove.

5. The heat treatment equipment for ductile iron pipe fittings as described in claim 1, characterized in that, A slider is fixedly connected to one side of the support plate, and the slider is slidably connected to the side wall of the frame through a groove.

6. The heat treatment equipment for ductile iron pipe fittings as described in claim 1, characterized in that, A sliding rod is fixedly connected to one side of the inner side of the frame, and a sliding sleeve is fitted on one end of the sliding rod. One side of the sliding sleeve is fixedly connected to one side of the nut seat. One end of the screw is rotatably connected to the inner wall of the frame through a rotating shaft, and the other end of the screw passes through the side wall of the frame through a bearing sleeve.

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