Centrifuge system for centrifugal casting of nodular cast iron pipes

Abstract

The utility model relates to a kind of centrifuge systems for centrifugal casting of nodular cast iron pipe, comprising: centrifugal host computer;Pipe mould;Socket support;The waterway of circulation is outside the pipe mould, cooling the molten iron for casting in the pipe mould;Further comprising: cooling part, with the centrifugal host computer or socket support fixed connection, the cooling part is additionally provided with different from the waterway of circulation outside the pipe mould in the cooling part;Waterway outlet in the cooling part is towards the socket section of the pipe mould, and is merged into the waterway of circulation outside the pipe mould, beneficial effect is: by simply increasing the nozzle waterway in socket section, separately for the problem of difficult cooling socket section, the stability of nodular cast iron pipe in pile pipe scene application product is improved, and the water circulation efficiency of whole equipment can be improved by the increased waterway.

Description

Technical Field

[0001] This utility model belongs to the field of special process equipment for metallurgical casting, specifically relating to a centrifuge system for centrifugal casting of ductile iron pipes in the process of centrifugal casting of piles and pipes. Background Technology

[0002] Centrifugal casting is a technique and method in which liquid metal is injected into a high-speed rotating mold, causing the molten metal to fill the mold and form a casting through centrifugal motion. Centrifugal motion allows the liquid metal to fill the mold radially and form a free surface on the casting; it eliminates the need for a core, resulting in cylindrical internal holes; it facilitates the removal of gases and inclusions from the liquid metal; and it influences the metal's crystallization process, thereby improving the mechanical and physical properties of the casting.

[0003] In existing technologies, ductile iron pipes are all produced using a horizontal centrifuge structure for centrifugal casting. For example, the water-cooled centrifuge for pipe mold sleeves used in long pipe drawing / heating casting systems, applied for by the domestic company Shenyang Yate Heavy Equipment Manufacturing Co., Ltd. (patent number 201410700878.6), and the PIPE CASTING MACHINEHAVINGIMPROVED PIPE MOLD STABLING RINGS published in US Patent US005277242A, both disclose how to use water immersion to produce ductile iron pipes.

[0004] Piles (also known as driven piles) are large tubular foundation components used in building construction to transfer structural loads to deep, stable soil or rock layers. Their core function is to form rigid supports by burying them deep underground, ensuring the stability of heavy structures such as buildings, bridges, and offshore platforms.

[0005] Given the excellent metallic properties of ductile iron pipes, their use as pile pipes is gradually being promoted. However, traditional ductile iron pipes and pile pipes often differ in wall thickness due to their different application environments. Typically, ductile iron pipes have a wall thickness grade of K7-9, but for pile pipes, the wall thickness grade needs to exceed grade 10. This poses a challenge to existing centrifugal casting machines. Generally, with increased wall thickness, the difficulty of rapidly removing heat through the mold during centrifugal casting increases, especially in the socket area, where the thickness is greater and casting is more difficult.

[0006] Therefore, there is an urgent need for a centrifuge system for centrifugal casting of ductile iron pipes for piles. Summary of the Invention

[0007] To overcome the problem of insufficient heat dissipation of pile pipes in existing centrifuges, especially in the socket area where heat dissipation is more difficult due to the socket structure, the inventors have designed a dedicated cooling water path for the socket, based on existing water-immersed or water-cooled horizontal centrifuges. This improves heat dissipation in the socket section and increases the efficiency of the overall water cooling circulation, thereby achieving stability in pile pipe production.

[0008] The technical solution adopted in this utility model is as follows:

[0009] A centrifuge system for centrifugal casting of ductile iron pipes includes:

[0010] Centrifuge unit;

[0011] The tube mold is located inside the centrifuge host and is powered by the centrifuge host to rotate around the axis.

[0012] A socket support is fixedly connected to the socket side of the centrifuge host, supporting the tube mold inside the centrifuge host and slidably connected to the tube mold;

[0013] The outside of the mold is a circulating water channel to cool the molten iron used for casting inside the mold.

[0014] Also includes:

[0015] The cooling section is fixedly connected to the centrifuge host or the socket support, and the cooling section is additionally provided with a water channel that is different from the water circulation outside the tube mold.

[0016] The water outlet of the cooling section faces the mold socket section and flows into the water circulation channel outside the mold.

[0017] Furthermore, the cooling section includes:

[0018] The fixing frame is an annular disc body, which is fixedly connected to the socket support, and the tube mold passes through the center of the fixing frame;

[0019] The fixing frame has a cavity, one end of which is connected to a water inlet. A nozzle is provided in the cavity near the mold socket side, and the nozzle communicates with the cavity and faces the mold socket side.

[0020] Furthermore,

[0021] The cavity inside the fixing frame is equipped with a water storage section or a water storage tank.

[0022] Furthermore,

[0023] The nozzle is fixedly mounted on the fixed frame and connects the inner cavity of the fixed frame with the outer fixed through hole.

[0024] Furthermore,

[0025] The extension line of the fixed perforation axis intersects with the socket section of the pipe mold.

[0026] Furthermore,

[0027] The number of fixed perforations is multiple, arranged circumferentially around the tube mold on the fixing frame.

[0028] Furthermore,

[0029] The cross-section of the fixing frame through the axis is a curved L-shape, the bottom edge of the L-shape extends along the direction of the pipe mold bearing section, and the nozzle is disposed on the bottom edge of the L-shape.

[0030] Furthermore,

[0031] The flow rate of the water in the cooling section is more than 1.5 times that of the circulating water in the outer part of the tube mold.

[0032] The advantages of this utility model over the prior art are as follows: by simply adding a nozzle water channel in the socket section, the problem of high cooling difficulty in the socket section is addressed, which improves the stability of ductile iron pipes in pile pipe applications. At the same time, the added water channel can improve the overall water circulation efficiency of the equipment, and the disturbance of the water flow in the cavity is equivalent to stirring the heat dissipation medium, thereby improving the heat dissipation efficiency. Attached Figure Description

[0033] Figure 1 This is a front view of a specific embodiment of the present utility model;

[0034] Figure 2 This is a partial enlarged view of the cooling section according to a specific embodiment of the present invention;

[0035] The annotation is represented as follows:

[0036] 100 - Centrifuge unit; 110 - Socket support;

[0037] 200-tube mold;

[0038] 300-Cooling section; 310-Fixed bracket; 320-Water storage section; 330-Water inlet; 340-Spray nozzle. Detailed Implementation

[0039] The technical solutions in the embodiments are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. In the description of this utility model, 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 drawings. They are only for the convenience of describing this utility model 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 utility model.

[0040] To overcome the problem of insufficient heat dissipation for pile pipes in existing centrifuges, especially in the socket area where heat dissipation is more difficult due to the socket's structure, the inventors have specifically added a cooling water path to the socket section, based on existing water-immersed or water-cooled horizontal centrifuges. This improves heat dissipation in the socket section and increases the overall efficiency of the water cooling circulation, thus achieving stability in pile pipe production. Please refer to [link / reference]. Figure 1 and Figure 2 The technical solution adopted in this specific embodiment is: a centrifuge system for centrifugal casting of ductile iron pipes, comprising:

[0041] Centrifuge unit 100; please refer to Figure 1 In this specific embodiment, the centrifuge host 100 needs to reciprocate at the casting station and is a water immersion horizontal centrifuge.

[0042] The tube mold 200, located inside the centrifuge host 100, is powered by the centrifuge host 100 and rotates around its axis; please refer to... Figure 1 In this embodiment, the specific support structure of the tube mold 200 is not specified. Please refer to the background technical documents. Rotating the support tube mold 200 inside the host is a conventional technical means for those skilled in the art.

[0043] A socket support 110 is fixedly connected to the socket side of the centrifuge host 100, supporting the pipe mold 200 within the centrifuge host 100 and slidably connected to the pipe mold 200. To better clarify the structure of this embodiment, the socket support 110 is shown separately to indicate the position of the socket section and other structures. It should be noted that the socket and spigot form of ductile iron pipes is prior art; the socket section typically refers to the larger end of the ductile iron pipe, that is, the area where the socket and spigot meet.

[0044] The outer side of the mold 200 is a circulating water channel to cool the molten iron used for casting inside the mold 200; the water immersion centrifugal technology is existing technology and is not the inventive concept of this specific embodiment, so it will not be described in detail.

[0045] Please see Figure 2It also includes:

[0046] The cooling section 300 is fixedly connected to the centrifuge host 100 or the socket support 110. The cooling section 300 is additionally provided with a water channel that is different from the water channel circulating outside the tube mold 200.

[0047] The water outlet of the cooling section 300 faces the socket section of the pipe mold 200 and flows into the circulating water channel on the outside of the pipe mold 200. In this specific embodiment, an additional water channel is added to improve the cooling effect of the socket section. At the same time, the added water channel changes the original circulation path, generating disturbance in the contact area between the water and the pipe mold 200, creating a stirring effect, which improves the overall heat dissipation effect and solves the disadvantages of thick walls and slow molding of ductile iron pipes used in centrifugal casting of pile pipes.

[0048] In other embodiments, preferably, please refer to [reference needed]. Figure 2 The cooling section 300 includes:

[0049] The fixing frame 310 is an annular disc body, which is fixedly connected to the socket support 110, and the tube mold 200 passes through the center of the fixing frame 310;

[0050] The fixing frame 310 has a cavity, one end of which is connected to a water inlet 330. A nozzle 340 is provided in the cavity near the socket side of the pipe mold 200. The nozzle 340 communicates with the cavity and faces the socket side of the pipe mold 200.

[0051] In some embodiments, a water storage space is formed inside the cooling section 300 using a pressure pump; preferably...

[0052] The cavity inside the fixing frame 310 is provided with a water storage section 320 or a water storage tank.

[0053] In some embodiments, preferably, the nozzle 340 faces a large flow of water, so different types of diversion can be considered to allow direct spraying. Of course, in some embodiments, a pipe plus nozzle structure can also achieve the same technical effect.

[0054] The nozzle 340 is fixedly mounted on the fixing frame 310 and connects the inner cavity of the fixing frame 310 with the outer fixing hole.

[0055] In some embodiments, please refer to Figure 2 The lower half, the preferred one,

[0056] The extension line of the fixed perforation axis intersects with the socket section of the pipe mold 200.

[0057] In some embodiments, to improve cooling efficiency, the ring-shaped structure of the fixing bracket 310 is used.

[0058] The number of fixed perforations is multiple, arranged circumferentially around the tube mold 200 on the fixing frame 310.

[0059] Please see Figure 2 Preferred

[0060] The cross-section of the fixed frame 310 through the axis is a curved L-shape, the bottom edge of the L-shape extends along the direction of the socket section of the tube mold 200, and the nozzle 340 is disposed on the bottom edge of the L-shape.

[0061] In some embodiments, in order to increase the rate of heat removal and improve the cooling and stirring effect,

[0062] The flow rate of the water in the cooling section 300 is more than 1.5 times the flow rate of the circulating water in the outer part of the tube mold 200.

[0063] In specific implementation: In existing water-immersed centrifuges, there is a circulating water path inside, from the spigot to the socket or from the socket to the spigot, with water entering from one side and exiting from the other. In this specific implementation, a separate water path is set up close to the socket section. When the pipe mold 200 is casting ductile iron pipe, the normal water path will carry away the heat transferred in the pipe mold 200, accelerating the molding of the ductile iron pipe. However, due to the large wall thickness of the pile pipe, the heat removal efficiency is not sufficient. Therefore, the separate water path, namely the cooling section 300, injects cooling water towards the socket section. The cooling water will quickly carry away the heat of the pipe mold in the socket section, increasing the cooling efficiency. At the same time, this part of the water path will merge into the centrifuge's own circulating water path. During the merging process, it will disturb the original water path, improve the heat carrying effect, increase the flow rate, and meet the overall equipment process requirements.

[0064] The beneficial effects are as follows: By simply adding a water jet path at the socket section, the problem of high cooling difficulty at the socket section is addressed, improving the stability of ductile iron pipes in pile pipe applications. Simultaneously, the added water path improves the overall water circulation efficiency of the equipment and disturbs the water flow within the cavity, effectively stirring the heat dissipation medium and enhancing heat dissipation efficiency. The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A centrifuge system for centrifugal casting of ductile iron pipes, characterized in that, include: Centrifuge unit (100); The tube mold (200) is located inside the centrifuge host (100) and is powered by the centrifuge host (100) to rotate around the axis; A socket support (110) is fixedly connected to the socket side of the centrifuge host (100), supports the tube mold (200) inside the centrifuge host (100), and is slidably connected to the tube mold (200); The outside of the mold (200) is a circulating water channel to cool the molten iron used for casting inside the mold (200); Also includes: The cooling section (300) is fixedly connected to the centrifuge host (100) or the socket support (110), and the cooling section (300) is additionally provided with a water channel that is different from the water circulating outside the tube mold (200); The water outlet of the cooling section (300) faces the socket section of the tube mold (200) and flows into the water circulation channel outside the tube mold (200).

2. The centrifuge system for centrifugal casting of ductile iron pipes according to claim 1, characterized in that, The cooling section (300) includes: The fixing frame (310) is an annular disc body, which is fixedly connected to the socket support (110), and the pipe mold (200) passes through the center of the fixing frame (310); The fixing frame (310) has a cavity, one end of which is connected to a water inlet (330). A nozzle (340) is provided in the cavity near the socket side of the pipe mold (200). The nozzle (340) communicates with the cavity and faces the socket side of the pipe mold (200).

3. The centrifuge system for centrifugal casting of ductile iron pipes according to claim 2, characterized in that, The cavity inside the fixed frame (310) is provided with a water storage section (320) or a water storage tank.

4. The centrifuge system for centrifugal casting of ductile iron pipes according to claim 2, characterized in that, The nozzle (340) is fixedly mounted on the fixing frame (310) and connects the inner cavity of the fixing frame (310) with the outer fixing hole.

5. The centrifuge system for centrifugal casting of ductile iron pipes according to claim 4, characterized in that, The extension line of the axis of the fixed perforation intersects the socket section of the pipe mold (200).

6. The centrifuge system for centrifugal casting of ductile iron pipes according to claim 5, characterized in that, The number of fixed perforations is multiple, arranged circumferentially around the tube mold (200) on the fixing frame (310).

7. The centrifuge system for centrifugal casting of ductile iron pipes according to claim 2, characterized in that, The cross-section of the fixing frame (310) through the axis is a curved L-shape, the bottom edge of the L-shape extends along the direction of the socket section of the tube mold (200), and the nozzle (340) is disposed on the bottom edge of the L-shape.

8. The centrifuge system for centrifugal casting of ductile iron pipes according to any one of claims 1-7, characterized in that, The flow rate of the water in the cooling section (300) is more than 1.5 times the flow rate of the circulating water in the outer part of the tube mold (200).

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