A secondary instantaneous inoculation device for ductile iron castings
The dual-hopper design and gate-controlled secondary instantaneous inoculation device for ductile iron castings solves the problem of uneven inoculant mixing, achieving precise inoculation results and simplified operation, thereby improving casting quality and equipment efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 大连华锐重工铸业有限公司
- Filing Date
- 2025-07-31
- Publication Date
- 2026-06-30
AI Technical Summary
In traditional ductile iron casting production, the two inoculants are manually mixed and stirred, which cannot guarantee uniformity and leads to poor inoculation effect. Existing equipment has a complex structure and is cumbersome to operate, making it difficult to achieve precise synchronous addition.
The system employs two independent hoppers for loading two types of inoculants, which are released synchronously via gate control and guided precisely through a feed pipe to ensure accurate contact between the inoculant and the molten iron.
This method achieves simultaneous contact of equal amounts of inoculant, improves the precision of graphite morphology control and matrix uniformity, simplifies the operation process, reduces equipment costs and maintenance difficulty, and ensures that the overlap rate between inoculation time and molten iron turning time reaches more than 85%.
Smart Images
Figure CN224424214U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of casting equipment technology, and more specifically, to a secondary instantaneous inoculation device for ductile iron castings. Background Technology
[0002] In the production of ductile iron castings, multiple inoculation treatments are required to control the graphite morphology and matrix structure to achieve performance requirements. Secondary instantaneous inoculation is a key process, its core function being to precisely control graphite morphology, refine the microstructure, and improve casting performance. In traditional processes, when using two inoculants simultaneously, the two secondary inoculants of equal weight and particle size must be manually mixed and stirred before being loaded into a secondary in-flow inoculation hopper for in-flow inoculation.
[0003] However, although this method involves manual mixing, it cannot guarantee uniformity, which can easily lead to poor inoculation results and unstable casting quality. Existing inoculation devices are complex in structure and cumbersome to operate, making it difficult to achieve precise and synchronous addition of the two inoculants. There is an urgent need for a secondary instantaneous inoculation device that is simple in structure, easy to operate, and can guarantee uniform inoculation. Utility Model Content
[0004] To address the aforementioned technical problems, a secondary instantaneous inoculation device for ductile iron castings is provided. This invention utilizes two independently loaded inoculants in dual hoppers, with synchronized release controlled by a gate and precise guidance via a feed pipe, achieving accurate overlap and contact between the inoculant and molten iron.
[0005] To achieve the above objectives, this utility model provides a secondary instantaneous inoculation device for ductile iron castings, comprising a support beam, a hopper, a gate, a baffle, and a guide pipe;
[0006] The supporting beam is fixed to the bracket above the casting box by bolts or welding.
[0007] The silo is divided into left and right parts by a middle partition, and each side silo can hold 50 kg of inoculant.
[0008] The gate is located in the middle of the cover plate below the hopper and can be pulled back and forth to achieve opening and closing control.
[0009] The baffle is connected to the upper part of the gate by bolts.
[0010] Furthermore, a cover plate is welded below the hopper, a guide pipe is welded below the cover plate, and stop blocks are machined on both sides of the gate with the discharge port. The support beam is fixed on the bracket above the casting box.
[0011] Furthermore, the center lines of the hopper discharge port, the cover plate through hole, and the guide pipe coincide.
[0012] Furthermore, the gate can be pulled back and forth in the middle of the cover plate, so that the inoculant in the two hoppers can be released synchronously by pulling the gate.
[0013] Furthermore, the stop blocks of the gate are located on both sides of the gate to limit the range of movement of the gate.
[0014] Furthermore, the left and right parts of the hopper are used to hold two different secondary inoculants respectively.
[0015] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:
[0016] 1. The present invention provides a secondary instantaneous inoculation device for ductile iron castings, which can ensure that two different secondary inoculants are in equal amounts and in contact with molten iron at the same time, thereby achieving a precise instantaneous inoculation effect. This effectively avoids the problem of poor inoculation effect caused by uneven mixing in traditional manual methods, and significantly improves the control accuracy of graphite morphology and the uniformity of matrix structure in ductile iron castings.
[0017] 2. The present invention provides a secondary instantaneous inoculation device for ductile iron castings, which adopts a simple mechanical structure design and does not require a complex control system or automated equipment. The inoculant can be accurately added by manually pulling the gate, which greatly reduces the equipment manufacturing cost and the difficulty of operation and maintenance.
[0018] 3. The present invention provides a secondary instantaneous inoculation device for ductile iron castings. By calculating the inoculation time and controlling the molten iron turning time, it ensures that the overlap rate between the inoculation time and the molten iron turning time reaches more than 85%, thereby achieving the optimal contact time between the inoculant and the molten iron and further optimizing the inoculation effect. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the structure of a secondary instantaneous inoculation device for ductile iron castings according to the present invention;
[0021] Figure 2 This is a schematic diagram of the baffle structure in a secondary instantaneous inoculation device for ductile iron castings as described in this utility model.
[0022] In the diagram: 1. Support beam; 2. Hopper; 3. Gate; 4. Baffle; 5. Guide pipe. Detailed Implementation
[0023] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0027] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0028] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0029] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0030] like Figures 1 to 2 As shown, this utility model provides a secondary instantaneous inoculation device for ductile iron castings, including a support beam 1, a hopper 2, a gate 3, a baffle 4, and a guide pipe 5;
[0031] The supporting beam 1 is fixed to the bracket above the casting box by bolts or welding to ensure that the supporting beam 1 is horizontal and stable and can bear the weight of the silo 2 and the inoculant. The silo 2 is divided into left and right parts by a middle partition. The main body of the silo 2 is made of high temperature resistant steel plate. Each side of the silo 2 can hold 50 kg of inoculant, ensuring that the inoculant needs of a single casting are met.
[0032] The gate 3 is located in the middle of the cover plate below the hopper 2 and can be pulled back and forth to achieve opening and closing control.
[0033] The baffle 4 is connected to the upper part of the gate 3 by bolts to ensure that the baffle 4 and the gate 3 fit tightly together.
[0034] The hopper 2 is welded with a cover plate below it, and a guide pipe 5 is welded below the cover plate. The gate 3 has stop blocks machined on both sides of the side with the discharge port. The stop blocks fit tightly with the gate 3 to limit the movement range of the gate 3 and ensure that the gate 3 moves smoothly. The support beam 1 is fixed on the bracket above the casting box.
[0035] Furthermore, mark the center line of the discharge port at the bottom of the silo 2, mark the center line of the through hole on the cover plate, and mark the center line on the guide pipe 5. The center line of the discharge port of the silo 2, the center line of the through hole on the cover plate, and the center line of the guide pipe 5 are aligned. Check the alignment accuracy through trial assembly to ensure that the inoculant flows out smoothly.
[0036] Furthermore, the gate 3 can be pulled back and forth in the middle of the cover plate. By pulling the gate 3, the inoculants in the two hoppers 2 can be released synchronously, ensuring that the two inoculants come into contact with the molten iron at the same time. The gate 3 is simple and intuitive to control, and the operator can accurately control the release time and flow rate of the inoculant.
[0037] Furthermore, the stop blocks of the gate 3 are located on both sides of the gate 3 to limit the movement range of the gate 3.
[0038] Furthermore, the left and right parts of the hopper 2 are used to hold two different secondary inoculants respectively.
[0039] The implementation process of this device is as follows: After weighing the two secondary inoculants, they are loaded into two hoppers 2 respectively. When the molten iron ladle is poured into the casting box, the gate 3 is opened. The inoculants in the two hoppers 2 flow out from the two guide pipes 5 at the same time and overlap with the molten iron. Finally, all the molten iron is poured into the mold to complete the casting.
[0040] The gestation time (s) can be calculated using the formula: t = m / v.
[0041] Where m: probiotic weight (kg); v: probiotic flow rate (kg / s).
[0042] The inoculant outflow time is determined by the calculation formula, thereby controlling the ladle turning time of molten iron and ensuring that the overlap rate between the inoculant time and the ladle turning time reaches more than 85%.
[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A device for secondary transient inoculation of a ductile iron casting, characterized in that, include: Support beams, hoppers, gates, baffles, and guide pipes; The supporting beam is fixed to the bracket above the casting box by bolts or welding. The silo is divided into left and right parts by a middle partition, and each side silo can hold 50 kg of inoculant. The gate is located in the middle of the cover plate below the hopper and can be pulled back and forth to achieve opening and closing control. The baffle is connected to the upper part of the gate by bolts.
2. The apparatus according to claim 1, wherein A cover plate is welded below the hopper, and a guide pipe is welded below the cover plate. Stop blocks are machined on both sides of the gate with the discharge port. The support beam is fixed on the bracket above the casting box.
3. The secondary instantaneous inoculation device for ductile iron castings according to claim 1, characterized in that, The center lines of the hopper discharge port, the cover plate through hole, and the guide pipe coincide.
4. The secondary instantaneous inoculation device for ductile iron castings according to claim 1, characterized in that, The gate is located in the middle of the cover plate and can be pulled back and forth to achieve the synchronous release of inoculant in the two hoppers.
5. The secondary instantaneous inoculation device for ductile iron castings according to claim 1, characterized in that, The stop blocks of the gate are located on both sides of the gate and are used to limit the range of movement of the gate.
6. The secondary instantaneous inoculation device for ductile iron castings according to claim 1, characterized in that, The left and right sections of the hopper are used to hold two different secondary inoculants, respectively.