Water cooling device for thick and large part of rocker arm cover in low-pressure casting

Abstract

The utility model discloses a water cooling device for a thick and large part of a rocker arm cover in low-pressure casting, the water cooling device is arranged in a mold mounting hole and comprises a flange plate, a forced cooling shell, a water supply pipe and a flow divider, the forced cooling shell is pressed in the mounting hole through the flange plate, and the top of the forced cooling shell is positioned in a mold cavity of a mold; the water outlet end of the water supply pipe penetrates into the forced cooling shell, the water inlet end of the water supply pipe is communicated with the water outlet end of external water supply equipment, the flow divider is located at the water outlet end of the water supply pipe and is close to the inner top of the forced cooling shell, and a water return pipe communicated with the forced cooling shell is arranged on the forced cooling shell. The forced cooling shell of the water cooling device can be used as a mold core of a mold while cooling the thick and large part of a casting, and is convenient to disassemble, assemble and replace; in addition, the diverter is used for supplying water, single-point water outlet in the forced cooling shell is changed into multi-point water outlet, the situation that the local temperature of the forced cooling shell is too low is avoided, it is guaranteed that the temperature in the forced cooling shell is uniform, and the cooling effect on the thick and large part of the casting is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of low-pressure casting, in particular to a water-cooling device for thick and large parts of a rocker arm cover in low-pressure casting. Background Art

[0002] The rocker arm cover is an important part of the engine, which can prevent the engine oil from leaking and protect the normal operation of the engine. Due to the special structure of the rocker arm cover, the wall thickness of a local position (i.e., the cooling distal stud position) is relatively thick and large. When using aluminum alloy low-pressure casting, shrinkage cavities or porosity are likely to occur in the thick and large wall positions. To solve the problem of shrinkage cavities or porosity in the thick and large wall positions, it is necessary to adopt a water-cooling process to adjust the temperature field of the mold and the product so that the temperature of the thick and large wall positions is reduced or sufficient feeding is obtained, eliminating the defects of shrinkage cavities or porosity in the product.

[0003] Most of the existing cooling methods in the industry are: digging holes in the mold for ventilation cooling or using water-cooling plates for intensive cooling on the mold. However, the ventilation cooling effect by digging holes in the mold is not good. It is difficult to carry too much heat in a short time, and it is impossible to quickly cool down. The change of the mold temperature field is not easy to control. When using the water-cooling plate, it needs to be attached to the outside of the mold. First, the installation is troublesome. Second, the heat exchange efficiency is relatively low. Third, it is easy to have problems such as improper fitting or inaccurate positioning, affecting the cooling effect of the thick and large parts inside the mold. Therefore, there is an urgent need for a water-cooling device that can be applied to the thick and large parts of the rocker arm cover in low-pressure casting and has a good cooling effect. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a water-cooling device for thick and large parts of a rocker arm cover in low-pressure casting, so as to solve the problem that in the traditional low-pressure casting process, the cooling effect on the thick and large parts of the casting is slow and poor by adopting the method of digging holes in the mold for ventilation cooling or using water-cooling plates for intensive cooling.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The water-cooling device for thick and large parts of a rocker arm cover in low-pressure casting includes a mold for the rocker arm cover. At least one installation hole adapted to the thick and large parts of the rocker arm cover is provided through the bottom of the mold. A water-cooling device is installed in the installation hole. The water-cooling device includes a flange plate, a strong cooling shell, a water supply pipe, and a diverter. The flange plate is installed at the bottom of the mold. The strong cooling shell is pressed in the installation hole through the flange plate, and the top of the strong cooling shell is located in the mold cavity. The water outlet end of the water supply pipe penetrates into the strong cooling shell. The water inlet end of the water supply pipe is communicated with the water outlet end of an external water supply device. The diverter is located at the water outlet end of the water supply pipe and is close to the inner top of the strong cooling shell. A return water pipe communicated with the strong cooling shell is provided on the strong cooling shell.

[0007] A further technical solution is as follows: The diverter includes a bottom plate and an upper cover. The bottom plate is connected to the upper cover and forms a water chamber. A plurality of water outlet holes communicating with the water chamber are provided on the circumferential surface and the top surface of the upper cover. The water supply pipe is connected to the bottom plate and communicates with the water chamber.

[0008] A further technical solution is as follows: An inverted diversion cone is provided on the inner top surface of the upper cover.

[0009] A further technical solution is as follows: A stepped hole adapted to the water supply pipe is provided on the bottom plate, and the smaller diameter of the stepped hole is consistent with the inner diameter of the water supply pipe.

[0010] A further technical solution is as follows: An air outlet valve is provided at the bottom of the strong cooling shell.

[0011] A further technical solution is as follows: The shape of the strong cooling shell is consistent with the shape of the forming hole at the thick and large part of the rocker arm cover.

[0012] Compared with the prior art, at least one of the following beneficial effects can be achieved by the present utility model:

[0013] The present utility model provides a water cooling device for the thick and large part of the rocker arm cover in low-pressure casting. The strong cooling shell of the water cooling device can, while cooling the thick and large part of the casting, also serve as a core of the mold, and is convenient for disassembly, installation and replacement. In addition, by using a diverter to supply water, the single-point water outlet in the strong cooling shell is changed to multi-point water outlet, preventing local over-cooling of the strong cooling shell, that is, ensuring uniform temperature inside the strong cooling shell and enhancing the cooling effect on the thick and large part of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the water cooling device for the thick and large part of the rocker arm cover in low-pressure casting according to the present utility model.

[0015] Figure 2 For the present utility model Figure 1 Semi-sectional structural schematic diagram from the front view perspective.

[0016] Figure 3 For the present utility model Figure 1 Schematic structural diagram from another perspective.

[0017] Figure 4 For the present utility model Figure 1 Schematic structural diagram of the water cooling device therein.

[0018] Figure 5 For the present utility model Figure 4 Semi-sectional structural schematic diagram from the side view perspective.

[0019] Figure 6 For the present utility model Figure 5Schematic structural diagram of the middle shunt.

[0020] Figure 7 For the present utility model Figure 6 Schematic semi-sectional structure diagram from the front view perspective.

[0021] Reference numerals: 1, mold; 2, water cooling device; 3, flange; 4, strong cooling shell; 5, water supply pipe; 6, shunt; 7, return water pipe; 8, bottom plate; 9, upper cover; 10, shunt cone; 11, stepped hole. Specific embodiments

[0022] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0024] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0025] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of this utility model is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Embodiment 1:

[0029] As shown in this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , a water-cooling device for the thick and large part of the rocker arm cover in low-pressure casting includes a mold 1 for the rocker arm cover. At least one installation hole adapted to the thick and large part of the rocker arm cover is provided through the bottom of the mold 1. A water-cooling device 2 is installed in the installation hole. The water-cooling device 2 includes a flange 3, a strong cooling shell 4, a water supply pipe 5, and a diverter 6. The flange 3 is installed at the bottom of the mold 1. The strong cooling shell 4 is pressed into the installation hole through the flange 3, and the top of the strong cooling shell 4 is located in the mold cavity of the mold 1. The water outlet end of the water supply pipe 5 penetrates into the strong cooling shell 4. The water inlet end of the water supply pipe 5 is communicated with the water outlet end of an external water supply device. The diverter 6 is located at the water outlet end of the water supply pipe 5, and the diverter 6 is close to the inner top of the strong cooling shell 4. A return water pipe 7 communicated with it is provided on the strong cooling shell 4.

[0030] Before work, an installation hole is opened at the bottom of the mold 1 at a suitable position (i.e., the thick and large part when the casting is formed), and then the water-cooling device 2 is assembled in the installation hole. First, the strong cooling shell 4, the water supply pipe 5, and the diverter 6 are assembled, and then the strong cooling shell 4 is pressed tightly into the installation hole from bottom to top through the flange 3. Then, the water inlet end of the water supply pipe 5 is communicated with the water outlet end of an external water supply device. At this time, the molten metal can be poured into the mold 1, and at the same time, the external water supply device starts to supply water. The cooling water flows out through the diverter 6 and is divided into multiple water flows, improving the flow effect and full distribution of the cooling water and ensuring the casting quality of the thick and large part of the casting.

[0031] It should be noted that during cooling, the strong cooling shell 4 cannot be filled with coolant to prevent supercooling from affecting the casting quality. Generally, intermittent water supply is required, and the water outlet rate of the strong cooling shell 4 is greater than the water inlet rate.

[0032] The diverter is an existing atomizing nozzle.

[0033] Embodiment 2:

[0034] On the basis of the above embodiment, in this embodiment, Figure 6 andFigure 7 As shown, the diverter 6 includes a bottom plate 8 and an upper cover 9. The bottom plate 8 is connected to the upper cover 9 and forms a water chamber. A plurality of water outlet holes communicating with the water chamber are provided on the peripheral surface and the top surface of the upper cover 9. The water supply pipe 5 is connected to the bottom plate 8 and communicates with the water chamber.

[0035] Generally, because the water outlet of a general atomizing nozzle is slow and small, it is not suitable for cooling castings with too large dimensions. The upper cover 9 and the bottom plate 8 of the diverter 6 are welded and form a water chamber. The water outlet holes on the peripheral surface and the top surface of the upper cover 9 can increase the water output, and divide the cooling water into multiple strands to uniformly contact the inner cavity of the strong cooling shell 4, especially the top, so as to improve the cooling effect.

[0036] Preferably, an inverted flow dividing cone 10 is provided on the inner top surface of the upper cover 9.

[0037] The flow dividing cone 10 plays a further role in flow division, guiding the flow direction of the cooling water to each water outlet hole.

[0038] Preferably, a stepped hole 11 adapted to the water supply pipe 5 is provided on the bottom plate 8, and the smaller diameter of the stepped hole is the same as the inner diameter of the water supply pipe 5.

[0039] The stepped hole facilitates the insertion and positioning of the water supply pipe 5 and subsequent welding.

[0040] Preferably, an air outlet valve is provided at the bottom of the strong cooling shell 4.

[0041] During cooling, considering that high-pressure steam will be formed in the inner cavity of the strong cooling shell 4 at high temperature, it is necessary to discharge the high-temperature steam by means of the air outlet valve.

[0042] Preferably, the shape of the strong cooling shell 4 is the same as the shape of the forming hole of the thick and large part of the rocker arm cover.

[0043] The strong cooling shell 4 acts as a core and facilitates the demolding of the subsequent casting.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Water cooling device for thick and large parts of rocker arm cover in low-pressure casting, including a mold (1) for the rocker arm cover, characterized in that: At least one mounting hole adapted to the thick part of the rocker arm cover is provided through the bottom of the mold (1), and a water cooling device (2) is installed in the mounting hole. The water cooling device (2) includes a flange plate (3), a strong cooling shell (4), a water supply pipe (5) and a diverter (6). The flange plate (3) is installed at the bottom of the mold (1), the strong cooling shell (4) is pressed in the mounting hole through the flange plate (3), and the top of the strong cooling shell (4) is located in the mold cavity of the mold (1). The water outlet end of the water supply pipe (5) penetrates into the strong cooling shell (4), the water inlet end of the water supply pipe (5) is communicated with the water outlet end of an external water supply device, the diverter (6) is located at the water outlet end of the water supply pipe (5), and the diverter (6) is close to the inner top of the strong cooling shell (4). A return water pipe (7) communicated with the strong cooling shell (4) is provided on the strong cooling shell (4).

2. The water cooling device for the thick and large part of the rocker arm cover in low-pressure casting according to claim 1, characterized in that: The diverter (6) includes a bottom plate (8) and an upper cover (9). The bottom plate (8) is connected to the upper cover (9) to form a water cavity. A plurality of water outlet holes communicated with the water cavity are provided on the peripheral surface and the top surface of the upper cover (9). The water supply pipe (5) is connected to the bottom plate (8) and communicated with the water cavity.

3. The water cooling device for the thick and large part of the rocker arm cover in low-pressure casting according to claim 2, characterized in that: An inverted diverter cone (10) is provided on the inner top surface of the upper cover (9).

4. The water cooling device for the thick and large part of the rocker arm cover in low-pressure casting according to claim 2, characterized in that: A stepped hole (11) adapted to the water supply pipe (5) is provided on the bottom plate (8), and the smaller diameter of the stepped hole is consistent with the inner diameter of the water supply pipe (5).

5. The water cooling device for the thick and large part of the rocker arm cover in low-pressure casting according to claim 1, characterized in that: An air outlet valve is provided at the bottom of the strong cooling shell (4).

6. The water cooling device for the thick and large part of the rocker arm cover in low-pressure casting according to claim 1, wherein: The shape of the strong cooling shell (4) is consistent with the shape of the forming hole of the thick part of the rocker arm cover.

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