A precision casting furnace

Abstract

The utility model discloses a precision casting furnace, including precision casting furnace body and mould preheating furnace, both ends of precision casting furnace body all are provided with the furnace door. The utility model discloses through the output of air pump and second pipeline enters the inside of precision casting furnace body to increase the air intake and combustion efficiency of hearth inside, when needing to the cooling of precision casting furnace body inside, through the regulation and control of valve group mechanism, after the internal waste heat is extracted through first pipeline, the output of air pump and waste heat delivery pipeline are used to deliver the waste heat to the mould preheating furnace and preheat the mould, and the mould preheating furnace is mainly used for preheating the mould, and the heat in the casting furnace is delivered into the mould preheating furnace, and then is preheated in cooperation with the preheating function of the preheating furnace itself, on one hand can realize the cooling of casting furnace inside, on the other hand can reduce the energy consumption of mould preheating furnace, and makes full use of the waste heat in the casting furnace.

Description

Technical Field

[0001] This utility model relates to the field of casting furnace technology, and in particular to a precision casting furnace. Background Technology

[0002] Molds are the core tools used to define the form of products in metal parts manufacturing. In the casting process, molten metal is injected into the mold cavity through the gating system, and after cooling and solidification, it forms the required parts, such as engine cylinder blocks or mechanical connecting parts. The design accuracy of the mold directly affects the dimensional tolerances and surface quality of the parts, and its cavity structure must take into account both metal flowability and filling integrity.

[0003] The casting furnace is responsible for heating solid metal to a suitable molten state for pouring, and its temperature control precision directly affects the quality of the molten metal. Taking aluminum alloy casting as an example, the furnace temperature needs to be stabilized within the range of 680-720℃ to ensure that the metal's fluidity and gas content meet the standards. Induction furnaces achieve rapid heating through electromagnetic induction, making them suitable for the production of small batches of precision parts; cupola furnaces, on the other hand, rely on coke combustion to provide a continuous heat source, making them more suitable for large-scale molten iron production. Fluctuations in furnace temperature can alter the chemical composition of the metal, thereby affecting the mechanical properties of the parts.

[0004] Patent document CN217358024U discloses a precision casting furnace, relating to the technical field of casting furnaces. It addresses the problem of uneven metal heating that still occurs in precision casting furnaces despite the presence of heating wires on the inner wall. The furnace body includes a placement slot with heating wires inside. A circular groove and mounting hole are connected to the bottom of the inner wall of the furnace body. A support mechanism is located on the lower surface of the furnace body, and a transmission mechanism is located on the inner wall of the support mechanism. A pushing mechanism is located on the upper surface of the transmission mechanism, and a turntable is located on the upper surface of the pushing mechanism. A crucible is placed on the upper surface of the turntable. During use, the transmission mechanism controls the turntable to rotate the crucible via the pushing mechanism. The pushing mechanism can control and adjust the height of the turntable, resulting in more uniform heating of the metal inside the crucible, accelerating the melting rate, and thus improving production efficiency.

[0005] As in the prior art of the aforementioned patent, casting furnaces are generally equipped with ventilation holes to facilitate the entry of oxygen into the furnace for combustion. Sometimes, air ducts are also installed at the ventilation holes to introduce combustion aids, thereby increasing the combustion temperature and efficiency of the casting furnace. However, during the use of the casting furnace, it is necessary to cool it down before starting the furnace. For example, "annealing operation after the end of the staged heat preservation", "changing materials or recasting different materials", "adjusting the fluidity of the molten metal" and other situations all require cooling down. However, one way to cool down is through natural cooling, but this method is inefficient. Another way is to extract the hot air from inside the casting furnace, but this method will result in waste of residual heat. Utility Model Content

[0006] The purpose of this invention is to provide a precision casting furnace to address the aforementioned shortcomings in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a precision casting furnace, comprising a precision casting furnace body and a mold preheating furnace, wherein furnace doors are provided at both ends of the precision casting furnace body, a control panel assembly is provided on the side wall of the precision casting furnace body, a vacuum pump is fixedly installed at the top of the precision casting furnace body, an oxygen pipeline is connected to the input end of the vacuum pump, a first pipe is connected to the oxygen pipeline, the first pipe is connected to the interior of the precision casting furnace body, a waste heat conveying pipeline is connected to the output end of the vacuum pump, a second pipe is connected to the waste heat conveying pipeline, and valve groups are provided on the first pipe, the second pipe, the oxygen pipeline, and the waste heat conveying pipeline, and the other end of the waste heat conveying pipeline is connected to the mold preheating furnace.

[0008] As a further description of the above technical solution: the valve group mechanism includes a first solenoid valve, a second solenoid valve, a third solenoid valve and a fourth solenoid valve, which are respectively connected and installed in the oxygen pipeline, the first pipeline, the second pipeline and the waste heat transmission pipeline.

[0009] As a further description of the above technical solution: the inner wall of the top plate of the precision casting furnace body is provided with a ventilation groove, the ventilation groove passes through both ends of the top plate and is interconnected with the outside, and the top wall of the ventilation groove is provided with a plurality of ventilation holes, which are interconnected with the first pipe and the second pipe respectively.

[0010] As a further description of the above technical solution: a filter screen is provided at the bottom of the ventilation hole.

[0011] As a further description of the above technical solution: the bottom end of the second pipe is connected to a second multi-row pipe, and each branch pipe of the second multi-row pipe is connected to multiple ventilation holes.

[0012] As a further description of the above technical solution: the bottom end of the first pipe is connected to a first multi-row pipe, the diameter of the first multi-row pipe is smaller than the diameter of the second multi-row pipe, the first multi-row pipe is arranged inside the second multi-row pipe, and each branch pipe of the first multi-row pipe is coaxially arranged with each branch pipe of the second multi-row pipe.

[0013] This utility model provides a precision casting furnace. It has the following beneficial effects: By regulating the air pump and valve assembly, oxygen or other combustion aids can be drawn into the air pump through an oxygen pipeline, and then enter the interior of the precision casting furnace body through the output end of the air pump and a second pipeline, thereby increasing the air intake and combustion efficiency inside the furnace. When cooling of the interior of the precision casting furnace body is required, the residual heat is extracted through the first pipeline by regulating the valve assembly, and then transported to the mold preheating furnace through the output end of the air pump and the residual heat conveying pipeline to preheat the mold. The mold preheating furnace is mainly used for preheating the mold. By transferring the heat from inside the casting furnace into the mold preheating furnace, combined with the preheating function of the preheating furnace itself, it can achieve cooling of the interior of the casting furnace on the one hand, and reduce the energy consumption of the mold preheating furnace on the other hand, making full use of the residual heat inside the casting furnace.

[0014] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0015] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a precision casting furnace proposed in this utility model;

[0017] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective;

[0018] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 4 For the present utility model Figure 3 A magnified structural diagram at point A;

[0020] Figure 5 For the present utility model Figure 4 A magnified structural diagram at point B.

[0021] Legend:

[0022] 1. Precision casting furnace body; 2. Furnace door; 3. Control panel assembly; 4. Oxygen pipeline; 5. First solenoid valve; 6. First pipe; 601. First multi-row pipe; 7. Second solenoid valve; 8. Air pump; 801. Output end; 802. Input end; 9. Waste heat conveying pipeline; 10. Second pipe; 1001. Second multi-row pipe; 11. Third solenoid valve; 12. Fourth solenoid valve; 13. Mold preheating furnace; 14. Ventilation slot; 1401. Ventilation hole; 1402. Filter screen; 15. Top plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-5 A precision casting furnace includes a precision casting furnace body 1 and a mold preheating furnace 13. Both ends of the precision casting furnace body 1 are provided with furnace doors 2. A control panel assembly 3 is provided on the side wall of the precision casting furnace body 1. A vacuum pump 8 is fixedly installed at the top of the precision casting furnace body 1. An oxygen pipeline 4 is connected to the input end 802 of the vacuum pump 8. A first pipe 6 is connected to the oxygen pipeline 4 and communicates with the interior of the precision casting furnace body 1. A waste heat conveying pipeline 9 is connected to the output end 801 of the vacuum pump 8. A second pipe 10 is connected to the waste heat conveying pipeline 9. Valve groups are provided on the first pipe 6, the second pipe 10, the oxygen pipeline 4, and the waste heat conveying pipeline 9. The other end of the waste heat conveying pipeline 9 is interconnected with the mold preheating furnace 13. The aforementioned precision casting furnace body 1, control panel assembly 3, and mold preheating furnace 13 are all prior art. By operating the control panel assembly 3, [the furnace body 1] can be [operated]. The internal temperature and air intake of the precision casting furnace body 1 are precisely controlled, so they are not described in detail. Through the regulation of the air pump 8 and the valve group mechanism, oxygen or other combustion aids can be drawn into the air pump 8 through the oxygen pipeline 4, and then enter the interior of the precision casting furnace body 1 through the output end 801 of the air pump 8 and the second pipeline 10, thereby increasing the air intake and combustion efficiency inside the furnace. When it is necessary to cool down the interior of the precision casting furnace body 1, the residual heat inside is extracted through the first pipeline 6 through the regulation of the valve group mechanism, and then transported to the mold preheating furnace 13 through the output end 801 of the air pump 8 and the residual heat conveying pipeline 9 to preheat the mold. The mold preheating furnace 13 is mainly used for preheating the mold. The heat inside the casting furnace is transferred into the mold preheating furnace 13, and combined with the preheating function of the preheating furnace itself, it can achieve cooling inside the casting furnace on the one hand, and reduce the energy consumption of the mold preheating furnace 13 on the other hand, making full use of the residual heat inside the casting furnace.

[0025] As a preferred technical solution in this embodiment, the valve group mechanism includes a first solenoid valve 5, a second solenoid valve 7, a third solenoid valve 11, and a fourth solenoid valve 12. The first solenoid valve 5, the second solenoid valve 7, the third solenoid valve 11, and the fourth solenoid valve 12 are respectively connected and installed on the oxygen pipeline 4, the first pipeline 6, the second pipeline 10, and the waste heat conveying pipeline 9. By closing the second solenoid valve 7 and the fourth solenoid valve 12, oxygen can be introduced into the furnace body. By closing the first solenoid valve 5 and the third solenoid valve 11, waste heat can be extracted from the furnace body.

[0026] As a preferred technical solution of this embodiment, the inner wall of the top plate 15 at the top of the precision casting furnace body 1 is provided with a ventilation groove 14. The ventilation groove 14 passes through both ends of the top plate 15 and communicates with the outside. The top wall of the ventilation groove 14 is provided with a plurality of ventilation holes 1401. The ventilation holes 1401 are respectively connected to the first pipe 6 and the second pipe 10. The first pipe 6 and the second pipe 10 can respectively introduce oxygen and extract waste heat through the holes.

[0027] As a preferred technical solution in this embodiment, a filter screen 1402 is provided at the bottom of the ventilation hole 1401; the filter screen 1402 is provided to prevent furnace ash inside the furnace from clogging the ventilation hole 1401 or entering the pipe and clogging the pipe.

[0028] As a preferred technical solution in this embodiment, the bottom end of the second pipe 10 is connected to a second multi-row pipe 1001, and each branch pipe of the second multi-row pipe 1001 is connected to a plurality of ventilation holes 1401. The second pipe 10 can inject oxygen or other combustion-supporting gas into the interior, and during the gas injection process, it can blow out the furnace ash attached to the filter screen 1402, reducing the risk of clogging of the filter screen 1402. This method can initially unclog the filter screen 1402. If thorough cleaning is required, the furnace door 2 needs to be opened to clean its interior. However, the airflow generated by the injected gas is sufficient to clean the filter screen 1402, which is enough to meet the requirements of gas inflow and outflow.

[0029] As a preferred technical solution in this embodiment, the bottom end of the first pipe 6 is connected to a first multi-row pipe 601. The diameter of the first multi-row pipe 601 is smaller than that of the second multi-row pipe 1001. The first multi-row pipe 601 is disposed inside the second multi-row pipe 1001. Each branch pipe of the first multi-row pipe 601 is coaxially arranged with each branch pipe of the second multi-row pipe 1001. The first multi-row pipe 601 and the second multi-row pipe 1001 control the outflow and inflow of gas, respectively. In the process of absorbing waste heat, since the first multi-row pipe 601 does not directly contact the filter screen 1402, this pipe arrangement can reduce the force of the negative pressure generated by suction to draw out the furnace ash upward, thereby reducing the risk of furnace ash clogging the internal furnace ash filter screen 1402.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A precision casting furnace, comprising a precision casting furnace body (1) and a mold preheating furnace (13), wherein furnace doors (2) are provided at both ends of the precision casting furnace body (1), and a control panel assembly (3) is provided on the side wall of the precision casting furnace body (1), characterized in that, A vacuum pump (8) is fixedly installed at the top of the precision casting furnace body (1). An oxygen pipeline (4) is connected to the input end (802) of the vacuum pump (8). A first pipe (6) is connected to the oxygen pipeline (4). The first pipe (6) is connected to the inside of the precision casting furnace body (1). A waste heat conveying pipeline (9) is connected to the output end (801) of the vacuum pump (8). A second pipe (10) is connected to the waste heat conveying pipeline (9). A valve group mechanism is provided on the first pipe (6), the second pipe (10), the oxygen pipeline (4), and the waste heat conveying pipeline (9). The other end of the waste heat conveying pipeline (9) is connected to the mold preheating furnace (13).

2. The precision casting furnace according to claim 1, characterized in that, The valve assembly includes a first solenoid valve (5), a second solenoid valve (7), a third solenoid valve (11), and a fourth solenoid valve (12). The first solenoid valve (5), the second solenoid valve (7), the third solenoid valve (11), and the fourth solenoid valve (12) are respectively connected and installed on the oxygen pipeline (4), the first pipeline (6), the second pipeline (10), and the waste heat transmission pipeline (9).

3. The precision casting furnace according to claim 1, characterized in that, The inner wall of the top plate (15) at the top of the precision casting furnace body (1) is provided with a ventilation groove (14). The ventilation groove (14) passes through both ends of the top plate (15) and is connected to the outside. The top wall of the ventilation groove (14) is provided with a plurality of ventilation holes (1401). The ventilation holes (1401) are connected to the first pipe (6) and the second pipe (10) respectively.

4. A precision casting furnace according to claim 3, characterized in that, A filter screen (1402) is provided at the bottom of the ventilation hole (1401).

5. A precision casting furnace according to claim 1, characterized in that, The bottom end of the second pipe (10) is connected to a second multi-row pipe (1001), and each branch pipe of the second multi-row pipe (1001) is connected to a plurality of ventilation holes (1401).

6. A precision casting furnace according to claim 1, characterized in that, The bottom end of the first pipe (6) is connected to a first multi-row pipe (601). The diameter of the first multi-row pipe (601) is smaller than that of the second multi-row pipe (1001). The first multi-row pipe (601) is located inside the second multi-row pipe (1001). Each branch pipe of the first multi-row pipe (601) is coaxially arranged with each branch pipe of the second multi-row pipe (1001).

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