An auxiliary casting device for the production of plate-type multi-way valves

Abstract

This utility model relates to the field of casting technology and discloses an auxiliary casting device for the production of plate-type multi-way valves, including a core plate, a riser, a product, and a sand core. The riser is located above the core plate, the product is located below the core plate, and the sand core is located below the core plate. The core plate is composed of an annular part and a rectangular part. This utility model fully utilizes the feeding function of the cylindrical riser. Secondly, the core plate, as a key component connecting the riser and the product, has a feeding channel in the middle that directly connects to the product. This allows the riser and the product to communicate and achieve feeding, while reducing direct heat exchange between the molten iron and the product, thus solving the problem of coarse graphite caused by local heat concentration in the product. The sand core is positioned and connected to the stop of the core plate through a stop post, which makes the device more stable and reduces the transfer of heat from the riser to the product. This solves the problem of coarse graphite at the riser in the product due to high riser heat and long solidification time in the existing process, and significantly improves the casting quality of plate-type multi-way valves.

Description

Technical Field

[0001] This utility model relates to the field of casting technology, and in particular to an auxiliary casting device for the production of plate multi-way valves. Background Technology

[0002] The disc-type multi-way valve is an essential hydraulic component in the hydraulic system of construction machinery, directly affecting the overall controllability of the excavator system. It is a special type of multi-way valve, typically composed of two or more directional valves, used to control the movement of multiple actuators. Each disc in the disc-type multi-way valve is sealed together with a seal to ensure isolation and control of the flow path. These discs are fixed together by screws and nuts, and the surface-to-surface contact areas must be sufficiently dense, requiring high pressure resistance and impact resistance.

[0003] Because the structure of the plate multi-way valve casting is complex, risers are required for feeding during production. However, overheating at the contact point between the valve body and the riser causes graphite to become coarse at that location. If the plate multi-way valve casting has coarse graphite, it will not only affect the performance of the casting itself, but may also cause oil leakage at the valve surface contact point, thus creating a safety hazard. Based on this, an auxiliary casting device for the production of plate multi-way valves is proposed for improvement. Utility Model Content

[0004] In view of the problem that the existing process has high heat and long solidification time at the riser, resulting in coarse graphite at the riser of the product, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an auxiliary casting device for the production of a plate-type multi-way valve, comprising a core plate, a riser, a product, and a sand core. The riser is located above the core plate, the product is located below the core plate, and a sand core is located below the core plate. The core plate is composed of an annular portion and a rectangular portion, which are integrally formed. The annular portion is located between the rectangular portions, and the rectangular portions are symmetrically distributed.

[0006] As a preferred embodiment, the annular portion of the core board is provided with a shrinkage compensation channel, and the core board is connected to the product through the shrinkage compensation channel.

[0007] As a preferred embodiment, the core plate is connected to a riser via a feeding channel, and the riser is connected to the product via the core plate.

[0008] As a preferred embodiment, the sand core is provided with symmetrical stop posts on both sides, and the bottom end of the core plate is provided with symmetrically distributed stop openings, wherein the stop posts and stop openings are adapted to each other and correspond one-to-one.

[0009] As a preferred embodiment, the sand core is further provided with a support block, and the bottom end of the annular portion of the core plate is provided with a groove that matches the support block.

[0010] As a preferred embodiment, the riser is placed vertically and is cylindrical in shape.

[0011] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model utilizes a cylindrical riser to fully exert its feeding function. Secondly, the core plate, as a key component connecting the riser and the product, has a feeding channel in the middle that directly connects to the product. This allows the riser and the product to communicate and achieve feeding, while also reducing direct heat exchange between the molten iron and the product, thus solving the problem of coarse graphite at the product caused by local heat concentration. The sand core is positioned and connected to the core plate through a stop post, which not only makes the device more stable as a whole, but also reduces the transfer of heat from the riser to the product. This solves the problem of coarse graphite at the riser in the existing process due to high riser heat and long solidification time, and significantly improves the casting quality of the plate multi-way valve.

[0012] 2. This utility model, through the cooperation of the support block and the groove, forms a "double positioning" with the original positioning structure of the stop post and the stop, further restricting the relative displacement of the core plate and the sand core in the horizontal or vertical direction, avoiding component offset due to the error of a single positioning structure during assembly, and ensuring the accuracy of the connection between the two. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the disassembled structure of this utility model; Figure 3 This is a bottom view of the structure of this utility model; Figure 4 for Figure 3 A magnified structural diagram of point A in the middle.

[0014] Explanation of reference numerals in the attached figures: 1. Core board; 11. Feeding channel; 12. Groove; 13. Stop; 2. Riser; 3. Product; 4. Sand core; 41. Stop post; 42. Support block. Detailed Implementation

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0016] Reference Figures 1-4This is the first embodiment of the present invention, which provides an auxiliary casting device for the production of a plate-type multi-way valve, including a core plate 1, a riser 2, a product 3 and a sand core 4. The riser 2 is located above the core plate 1, the product 3 is located below the core plate 1, and the sand core 4 is located below the core plate 1. The core plate 1 is composed of an annular part and a rectangular part, which are integrally formed. The annular part is located between the rectangular parts, and the rectangular parts are symmetrically distributed. The annular portion of the core board 1 is provided with a feeding channel 11, and the product 3 is connected to the core board 1 through the feeding channel 11. The core plate 1 is connected to the riser 2 through the feeding channel 11, and the riser 2 is connected to the product 3 through the core plate 1; The sand core 4 is symmetrically provided with stop posts 41 on both sides, and the bottom of the core plate 1 is provided with symmetrically distributed stop openings 13. The stop posts 41 and the stop openings 13 are adapted to each other and correspond one-to-one. Riser 2 is placed vertically and is cylindrical in shape.

[0017] During use, the riser 2 is cylindrical and can stably supply the product 3 through the core plate 1, giving full play to the feeding function and avoiding defects caused by the cooling and shrinkage of the product 3. The core plate 1 is a key component that connects the upper and lower parts. The feeding channel 11 opened in the middle is directly connected to the product 3, which realizes the connection between the riser 2 and the product 3. While completing the feeding, it reduces the direct heat exchange between the molten iron and the product 3, thereby solving the problem of coarse graphite caused by local heat concentration in the product 3. The stop 13 at the bottom of the core plate 1 is matched and positioned with the stop posts 41 on both sides of the sand core 4 to achieve a stable connection between the two. The sand core 4 is not only stabilized as a whole by the auxiliary device of the positioning structure, but also provides targeted heat insulation for the riser 2 position, reducing the heat transfer from the riser 2 to the product 3. At the same time, it does not affect the feeding channel 11 of the riser 2 to the product 3 through the core plate 1. This solves the technical pain point of "large heat and long solidification time of riser 2 in the existing process, resulting in large graphite at the product 3 and riser 2", and improves the casting quality of the plate multi-way valve.

[0018] Reference Figures 1-4 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the sand core 4 is also provided with a support block 42, and the bottom end of the annular part of the core plate 1 is provided with a groove 12 that is adapted to the support block 42.

[0019] During use, the cooperation between the support block 42 and the groove 12, together with the original positioning structure of the stop post 41 and the stop 13, forms a "double positioning", which further restricts the relative displacement of the core plate 1 and the sand core 4 in the horizontal or vertical direction, avoids the component offset caused by the error of a single positioning structure during assembly, and ensures the accuracy of the connection between the two.

[0020] Working principle: First, the device is assembled and positioned. The sand core 4 is matched one by one with the stop posts 41 symmetrically arranged on both sides and the stop openings 13 symmetrically distributed at the bottom of the core plate 1. At the same time, the support block 42 on the sand core 4 is precisely matched with the groove 12 at the bottom of the annular part of the core plate 1, forming a double positioning structure to ensure that the core plate 1 and the sand core 4 are firmly connected and accurately positioned, providing a stable basic framework for the subsequent casting process. Next, after the molten iron is poured in, it first fills the cavity of product 3. At the same time, some of the molten iron rises into riser 2 through the feeding channel 11 of core plate 1, making riser 2 a reservoir for storing extra molten iron. As product 3 gradually cools and shrinks, the molten iron in riser 2 flows back to the shrinkage part of product 3 through the feeding channel 11 of core plate 1 under the action of gravity, making up for the volume gap caused by cooling and avoiding defects such as shrinkage cavities and porosity in product 3. During the flow of molten iron, core plate 1, on the one hand, ensures the connection between riser 2 and product 3 through feeding channel 11 to achieve feeding; on the other hand, its own structure reduces the direct heat exchange between molten iron and product 3, reduces the problem of uneven local cooling rate of product 3, and thus suppresses the phenomenon of graphite coarsening. The sand core 4 is precisely matched with the stop 13 at the bottom of the core plate 1 through the stop 41 on both sides, ensuring the relative position stability of the core plate 1, riser 2 and product 3, and avoiding the impact of assembly deviation on the feeding path; at the same time, the sand core 4 forms heat insulation protection for the riser 2, slows down the cooling rate of the riser 2, prolongs its feeding time, and does not obstruct the flow of molten iron in the feeding channel 11, thus solving the problem of excessive heat and slow solidification of riser 2 in the existing process, which leads to coarse graphite at the product 3 and riser 2. After riser 2 completes feeding and product 3 is fully cooled, the entire casting process ends, ultimately forming a plate-type multi-way valve component that meets quality requirements.

[0021] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An auxiliary casting device for the production of a plate-type multi-way valve, comprising a core plate (1), a riser (2), a product (3), and a sand core (4), characterized in that: The riser (2) is located above the core plate (1), the product (3) is located below the core plate (1), and a sand core (4) is located below the core plate (1). The core plate (1) is composed of an annular part and a rectangular part. The annular part and the rectangular part are integrally formed. The annular part is located between the rectangular parts, and the rectangular parts are symmetrically distributed.

2. The auxiliary casting device for the production of a plate-type multi-way valve according to claim 1, characterized in that: The core board (1) has a shrinkage channel (11) on its annular part, and the core board (1) is connected to the product (3) through the shrinkage channel (11).

3. The auxiliary casting device for the production of a plate-type multi-way valve according to claim 1, characterized in that: The core plate (1) is connected to a riser (2) through a feeding channel (11), and the riser (2) is connected to the product (3) through the core plate (1).

4. The auxiliary casting device for the production of a plate-type multi-way valve according to claim 1, characterized in that: The sand core (4) is provided with symmetrical stop posts (41) on both sides, and the bottom of the core plate (1) is provided with symmetrically distributed stop openings (13). The stop posts (41) and the stop openings (13) are adapted to each other and correspond one to one.

5. The auxiliary casting device for the production of a plate-type multi-way valve according to claim 1, characterized in that: The sand core (4) is also provided with a support block (42), and the bottom end of the annular part of the core plate (1) is provided with a groove (12) that matches the support block (42).

6. The auxiliary casting device for the production of a plate-type multi-way valve according to claim 1, characterized in that: The riser (2) is placed vertically and is cylindrical.

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