Hydraulic main control valve body casting

Abstract

The utility model discloses a hydraulic main control valve body casting, and particularly relates to the technical field of valve body manufacturing equipment, the hydraulic main control valve body casting comprises a valve body casting and a bottom layer flow channel, a front flow channel opening is arranged below the front end face of the valve body casting, and the bottom layer flow channel is arranged at the lower end of an inner cavity of the valve body casting; according to the utility model, the riser is changed to be small and matched with the chilling block and the chaplet, so that the solidification sequence of a casting is optimized, the feeding capacity of the riser is enhanced, the casting can be shrunk more uniformly in the solidification process, the influence of isolated small hot spots is reduced, a feeding channel is smoother, the generation of shrinkage porosity of a shrinkage cavity is effectively avoided, and the internal quality and density of the casting are improved; the sand core is filled and compacted again on the basis of the first sand shooting, a basic framework of the sand core is formed through the first sand shooting, gaps in the sand core are further filled through the second sand shooting, sand grains of the sand core are combined more tightly, the porosity is reduced, and the non-deformability of the sand core is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve body manufacturing equipment technical field more specifically, the utility model relates to hydraulic main control valve body casting. BACKGROUND

[0002] Casting process is one of the common methods for manufacturing hydraulic main control valve body, because it can manufacture complex shape valve body structure, meet the functional requirements of different hydraulic systems. Through casting, various runner, chamber and other internal structures can be formed at one time, reducing the subsequent processing amount, improving production efficiency and reducing cost. At the same time, the casting material has good strength, wear resistance and corrosion resistance, and can work stably for a long time in harsh working environment;

[0003] After searching, the existing patent (CN118856070B) discloses a hydraulic component multifunctional control valve body casting, which comprises a main body, a horizontal main runner, a first longitudinal runner, a second longitudinal runner, a third longitudinal runner, a front one runner port and a front two runner port are designed on the front side of the main body, a rear one runner port is designed on the rear side of the main body, a left one runner port is designed on the left side of the main body, a right one runner port is designed on the right side of the main body, a horizontal main runner is designed in the middle of the main body, the left end of the horizontal main runner is connected with the left one runner port, the right end of the horizontal main runner is connected with the right one runner port, seven ring grooves are designed on the upper surface of the horizontal main runner, and they are the first ring groove, the second ring groove and the third ring groove, the fourth ring groove, the fifth ring groove, the sixth ring groove and the seventh ring groove from left to right. The advantages are that the design is ingenious, the structure is reasonable and compact, the production and processing are convenient, and the forming rate is high. The inventor found the following problems in the process of realizing the utility model:

[0004] The existing valve body casting is mostly made of metal material, which will shrink in volume when cooled from liquid to solid state. During the solidification process, the liquid metal needs to be replenished in time. Once there is deviation, voids will be formed in the casting. During the process of changing from liquid to solid state, the casting will shrink in volume. The complex internal cavity of the casting divides the casting into many isolated small hot spots, resulting in unsmooth feeding channel, limited riser area, affecting sand core support and exhaust, and further causing casting size difference and porosity problems. The complex sand core has many assembly interfaces, affecting the size and internal cavity cleanliness of the casting;

[0005] Therefore, the hydraulic main control valve body casting is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides a hydraulic main control valve body casting to solve the problems in the background art.

[0007] To achieve the above object, the utility model provides the following technical scheme: Hydraulic main control valve body casting piece, including valve body casting piece and bottom layer runner, the lower side of valve body casting piece front end surface is equipped with front runner, and the rear end surface of valve body casting piece is equipped with rear runner, the left side of valve body casting piece is equipped with left runner, the left lower side of bottom layer runner is equipped with left one riser, the upper end of front runner is provided with front two runner, the left side of front two runner is equipped with front riser, and the front of valve body casting piece upper end is equipped with upper one riser, upper one riser is provided with two groups, the rear of upper one riser is equipped with upper two riser, the rear of upper two riser is equipped with upper one runner, the left side of upper one runner is equipped with upper two runner,

[0008] The bottom layer runner is arranged at the lower end of the inner cavity of the valve body casting piece, a first runner is arranged above the front end of the bottom layer runner, a second runner is arranged behind the first runner, a third runner is arranged behind the second runner, a fourth runner is arranged behind the left side of the third runner, and a fifth runner is arranged on the right side of the fourth runner.

[0009] Preferably, the bottom layer runner is in communication with the front runner and the rear runner, and the riser apertures of the left riser, the upper one riser, and the upper two riser are all 100 mm.

[0010] Preferably, the upper one riser is symmetrically arranged, and the inner cavity of the first runner is in communication with the front two runner, the two groups of upper one riser, and the bottom layer runner.

[0011] Preferably, the upper two riser is symmetrically arranged, and the inner cavity of the third runner is in communication with the two groups of upper two riser and the bottom layer runner.

[0012] Preferably, the inner cavity of the fourth runner is in communication with the left runner, the upper one runner, and the bottom layer runner, and the inner cavity of the fifth runner is in communication with the upper two runner and the bottom layer runner.

[0013] Preferably, the upper one runner and the upper two runner are symmetrically arranged, and the two groups of upper one riser and the two groups of upper two riser are distributed and arranged in an equidistant spacing manner.

[0014] The utility model discloses a technical effect and advantage:

[0015] 1, compared with the prior art, the hydraulic main control valve body casting piece passes through the improvement small riser and cooperates the cold iron, the core support, optimizes the casting piece solidification sequence, strengthens the riser feeding ability, makes the casting piece in the solidification process can more evenly shrink, reduces the influence of isolated small hot spot, lets the feeding channel be more smooth, effectively avoids the generation of shrinkage cavity and shrinkage, improves the internal quality and the density of casting piece.

[0016] 2. Compared with the existing technology, the hydraulic main control valve body casting adopts secondary sand shooting, which is based on the first sand shooting, and then fills and compacts the sand core again. The first sand shooting forms the basic skeleton of the sand core, and the second sand shooting further fills the voids inside the sand core, making the sand particles of the sand core more tightly bonded, reducing the porosity, thereby improving the overall strength of the sand core and enhancing its resistance to deformation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the overall internal three-dimensional structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of this utility model viewed from below.

[0020] Figure 4 This utility model Figure 1 A magnified schematic diagram of the structure at point A in the diagram.

[0021] The attached diagram is labeled as follows: 1. Valve body casting; 101. Left first riser; 2. Front first runner inlet; 3. Rear first runner inlet; 4. Left runner inlet; 5. Front second runner inlet; 51. Front riser; 6. Upper first riser; 7. Upper second riser; 8. Upper first runner inlet; 9. Upper second runner inlet; 10. Bottom runner; 11. First runner; 12. Second runner; 13. Third runner; 14. Fourth runner; 15. Fifth runner. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] As attached Figures 1 to 4The hydraulic master valve body casting shown, including valve body casting 1 and bottom layer runner 10, the lower end of the valve body casting 1 is provided with a front runner port 2, and the rear end of the valve body casting 1 is provided with a rear runner port 3, the left side of the valve body casting 1 is provided with a left runner port 4, the left lower side of the bottom layer runner 10 is provided with a left one riser 101, the upper end of the front runner port 2 is provided with a front two runner port 5, the left side of the front two runner port 5 is provided with a front riser 51, and the front of the upper end of the valve body casting 1 is provided with an upper one riser 6, the upper one riser 6 is provided with two groups, the rear of the upper one riser 6 is provided with an upper two riser 7, the rear of the upper two riser 7 is provided with an upper one runner port 8, and the left side of the upper one runner port 8 is provided with an upper two runner port 9.

[0025] The bottom layer runner 10 is arranged at the lower end of the inner cavity of the valve body casting 1, the upper end of the front end of the bottom layer runner 10 is provided with a first runner 11, the rear of the first runner 11 is provided with a second runner 12, the rear of the second runner 12 is provided with a third runner 13, the rear of the left side of the third runner 13 is provided with a fourth runner 14, and the right side of the fourth runner 14 is provided with a fifth runner 15.

[0026] Among them: the valve body casting 1 as the basic structure of the whole valve body casting, provides mounting position and support for other parts, guarantees the relative position accuracy of each part, makes the valve body casting 1 form a complete whole, the front runner port 2 is one of the front end entrances of the valve body casting 1, provides a specific entering path for the fluid, facilitates the control of the inflow direction and flow of the fluid, the front runner port 2 is one of the front end entrances of the hydraulic fluid into the valve body casting 1, provides a specific entering path for the fluid, facilitates the control of the inflow direction and flow of the fluid, the rear runner port 3 is the rear end outlet of the valve body casting 1, makes the hydraulic fluid after internal processing or adjustment be able to flow smoothly, the left runner port 4 increases the passage of fluid in and out of the casting, provides a lateral fluid transmission path, the bottom layer runner 10 is the basic channel of the internal fluid flow of the casting, is responsible for the preliminary distribution and guidance of the fluid from different runner ports, ensures that the fluid can flow reasonably in the valve body, the left one riser 101 provides feeding for the left lower side area of the bottom layer runner 10 during casting, prevents defects such as shrinkage cavity and shrinkage porosity from occurring in the part during solidification process, improves the density and quality of the casting, the front two runner port 5 cooperates with the front runner port 2, can realize the function of fluid distribution or confluence, the front riser 51 feeds the area near the front two runner port 5, guarantees the full filling of the metal liquid during casting, reduces casting defects, improves the quality of the casting, the upper one riser 6 can more comprehensively feed the front area of the upper end of the valve body casting 1, ensures that the larger area is fully supplemented with metal liquid during the casting process, the upper two riser 7 cooperates with the upper one riser 6, further perfects the feeding effect on the upper end of the valve body shell, expands the feeding range, improves the casting quality of the upper part of the whole valve body;

[0027] The upper first runner port 8 provides an outlet or an inlet for the fluid in the upper part of the casting, meeting the fluid transmission requirements of the hydraulic system at different heights and positions. The upper second runner port 9 can share the flow of the upper first runner port 8 when needed. The first runner 11 is a branch runner above the front end of the bottom runner 10, guiding the fluid of the bottom runner 10 to a specific area, realizing further distribution and transmission of the fluid in the valve body casting 1. The second runner 12 receives the fluid of the first runner 11 and transmits it backward, further guiding the fluid to flow in the valve body casting 1, so that the fluid can reach the desired position. The third runner 13 continues to transmit and distribute the fluid, providing a subsequent flow path for the fluid, so that the fluid can flow in the valve body casting 1 according to the predetermined route, realizing the connection and conversion between different runners. The fourth runner 14 branches from the third runner 13 to provide a left rear flow path for the fluid, increasing the diversity and flexibility of fluid flow. The fifth runner 15 is a branch runner on the right side of the fourth runner 14, further refining the flow path of the fluid in the valve body, so that the fluid can be more accurately distributed to each desired area.

[0028] Example two

[0029] Based on the basis of example 1, the scheme in example 1 is further refined in combination with the specific working mode as follows: Figures 1 to 4 as shown in the following description:

[0030] As a preferred embodiment, the bottom runner 10 is connected to the front runner port 2 and the rear runner port 3, and the aperture of the left first riser 101, the upper first riser 6 and the upper second riser 7 is 100 mm. Further, the bottom runner 10 is connected to the front runner port 2 and the rear runner port 3, which can ensure that the hydraulic fluid flows smoothly from the front runner port 2 into the valve body casting 1, is reasonably distributed and transmitted through the bottom runner 10, and then flows out from the rear runner port 3, forming a complete and smooth fluid circuit. The apertures of the left first riser 101, the upper first riser 6 and the upper second riser 7 are all 100 mm, which is small, and is matched with the chill and the core support, optimizing the solidification sequence of the casting, strengthening the riser feeding ability, so that the casting can shrink more uniformly during solidification, and can provide sufficient molten metal for the casting during casting.

[0031] As a preferred embodiment, the upper riser 6 is symmetrically arranged, the inner cavity of the first runner 11 is respectively communicated with the front two runner ports 5, the two groups of upper risers 6 and the bottom layer runner 10; further, the symmetrically arranged upper riser 6 can make the top of the casting balanced in the solidification process. Since the risers are symmetrically distributed, the heat dissipation and the metal liquid supplement are basically consistent on both sides, which helps the uniform shrinkage of the top of the casting, reduces the deformation, stress concentration and other problems caused by uneven shrinkage, thereby improving the dimensional accuracy and overall quality uniformity of the casting. The first runner 11 is communicated with the front two runner ports 5, the two groups of upper risers 6 and the bottom layer runner 10, forming a complex and effective feeding network. The metal liquid can flow more smoothly from the riser and the bottom layer runner 10 to the position needing feeding through this communicated runner system, greatly enhancing the feeding effect and effectively reducing defects such as shrinkage and porosity, improving the internal quality and density of the casting.

[0032] As a preferred embodiment, the upper riser 6 is symmetrically arranged, the inner cavity of the first runner 11 is respectively communicated with the front two runner ports 5, the two groups of upper risers 6 and the bottom layer runner 10; further, the symmetrically arranged upper riser 6 can make the top of the casting balanced in the solidification process. Since the risers are symmetrically distributed, the heat dissipation and the metal liquid supplement are basically consistent on both sides, which helps the uniform shrinkage of the top of the casting, reduces the deformation, stress concentration and other problems caused by uneven shrinkage, thereby improving the dimensional accuracy and overall quality uniformity of the casting. The first runner 11 is communicated with the front two runner ports 5, the two groups of upper risers 6 and the bottom layer runner 10, forming a complex and effective feeding network. The metal liquid can flow more smoothly from the riser and the bottom layer runner 10 to the position needing feeding through this communicated runner system, greatly enhancing the feeding effect and effectively reducing defects such as shrinkage and porosity, improving the internal quality and density of the casting.

[0033] As a preferred embodiment, the inner cavity of the fourth runner 14 is respectively communicated with the left runner port 4, the upper first runner port 8 and the bottom layer runner 10, and the inner cavity of the fifth runner 15 is respectively communicated with the upper second runner port 9 and the bottom layer runner 10; further, the fourth runner 14 connects the left runner port 4, the upper first runner port 8 and the bottom layer runner 10, providing a channel for the metal liquid to flow into the casting cavity from different directions, which can ensure that the metal liquid fills each part of the casting more comprehensively and uniformly, reduce defects such as insufficient filling and cold shut caused by insufficient filling, and ensure the complete profile and dimensional accuracy of the casting.

[0034] As a preferred embodiment, the upper first runner port 8 and the upper second runner port 9 are symmetrically arranged, and the two groups of upper first risers 6 and the two groups of upper second risers 7 are arranged in an equidistant spacing manner; further, the symmetric arrangement of the upper first runner port 8 and the upper second runner port 9 can make the flow paths and filling conditions of the metal liquid entering the cavity from the two ports more similar, and can more evenly fill the upper region of the casting, and the equidistantly spaced risers can make the heat dissipation and heat supplement of different positions of the upper part of the casting more uniform during the solidification process of the casting, which is helpful to form a uniform temperature field, avoid local overheating or undercooling, reduce the organization unevenness and thermal stress concentration caused by temperature difference, and improve the overall performance of the casting.

[0035] The working process of the utility model is as follows: firstly, using the twice sand shooting process, the mold is prepared first, the sand is shot into the basic shape of the valve body casting 1 through the sand shooting equipment, the first sand shooting preliminarily forms part of the structure, the second sand shooting further perfects, ensures the accurate formation of each runner, riser and runner port, etc., after forming the sand cavity in the mold, the molten metal liquid is injected into the cavity through a suitable gate, the metal liquid first enters the bottom layer runner 10, since the bottom layer runner 10 is connected with the previous runner port 2 and the next runner port 3, the metal liquid can enter and flow out from these runner ports, the symmetric arrangement of the upper first runner port 8 and the upper second runner port 9 can make the flow paths and filling conditions of the metal liquid entering the cavity from the two ports more similar, which can more evenly fill the upper region of the casting, and at the same time, other runners connected with the bottom layer runner 10 are also started to be filled, the bottom layer runner 10 distributes the fluid to each runner connected therewith, the fluid can be transmitted upward through the first runner 11, the first runner 11 guides the fluid to a specific area connected with the previous second runner port 5, realizes the flow separation or flow combination of the fluid, and continues to transmit backward to the second runner 12, the second runner 12 transmits the fluid to the third runner 13, and so on, so that the fluid flows in the valve body casting 1 according to the predetermined route.

[0036] The fourth runner 14 connects the left runner port 4, the upper first runner port 8 and the bottom runner 10, providing a channel for the fluid to flow into the casting cavity from different directions, so that the fluid can more fully and uniformly fill each part of the casting and flow to different areas as needed. The fifth runner 15 is a branch runner on the right side of the fourth runner 14, further refining the flow path of the fluid, allowing it to be more precisely distributed to each desired area. As the temperature of the metal liquid decreases and begins to solidify, the left first riser 101, the upper first riser 6, the upper second riser 7 and the front riser 51 come into play. The metal liquid stored in the riser is under the action of gravity and negative pressure generated by solidification shrinkage, and flows through the channel connected to the casting to the solidification shrinkage part of the casting. The upper first riser 6 is symmetrically arranged and communicates with the first runner 11, which can balance the feeding of the front area of the top of the casting. The upper second riser 7 is symmetrically arranged and communicates with the third runner 13, which can effectively feed the rear area of the top of the casting. The left first riser 101 feeds the lower area on the left side of the bottom runner 10, and so on. Combined with the cold iron and core support, the solidification sequence is optimized, so that the casting gradually solidifies from the part farthest from the riser to the direction of the riser, reducing defects such as shrinkage holes and porosity. The above is the working principle of the hydraulic master valve body casting.

Claims

1. A hydraulic main control valve body casting, comprising a valve body casting (1) and a bottom flow channel (10), characterized in that: The valve body casting (1) has a front flow channel (2) below the front end face, and a rear flow channel (3) is provided on the rear end face of the valve body casting (1). The valve body casting (1) has a left flow channel (4) on the right side. The bottom flow channel (10) has a left riser (101) below the left side. The front flow channel (2) has a front second flow channel (5) at its upper end. The front second flow channel (5) has a front riser (51) on its left side. The valve body casting (1) has an upper riser (6) at its upper front end. The upper riser (6) has two sets. The upper second riser (7) is provided behind the upper riser (6). The upper flow channel (8) is provided behind the upper second riser (7). The upper second flow channel (9) is provided on the left side of the upper flow channel (8). The bottom flow channel (10) is located at the lower end of the inner cavity of the valve body casting (1). A first flow channel (11) is provided above the front end of the bottom flow channel (10). A second flow channel (12) is provided behind the first flow channel (11). A third flow channel (13) is provided behind the second flow channel (12). A fourth flow channel (14) is provided behind the left side of the third flow channel (13). A fifth flow channel (15) is provided on the right side of the fourth flow channel (14).

2. The hydraulic main control valve body casting according to claim 1, characterized in that: The bottom flow channel (10) is connected to the front flow channel opening (2) and the rear flow channel opening (3) respectively. The riser orifice diameter of the left riser (101), the upper riser (6) and the upper second riser (7) is 100mm.

3. The hydraulic main control valve body casting according to claim 1, characterized in that: The upper riser (6) is symmetrically arranged, and the inner cavity of the first flow channel (11) is interconnected with the first two flow channel openings (5), the two sets of upper risers (6) and the bottom flow channel (10).

4. The hydraulic main control valve body casting according to claim 1, characterized in that: The upper two risers (7) are symmetrically arranged, and the inner cavity of the third flow channel (13) is connected to the two sets of upper two risers (7) and the bottom flow channel (10).

5. The hydraulic main control valve body casting according to claim 1, characterized in that: The inner cavity of the fourth flow channel (14) is connected to the left flow channel opening (4), the upper flow channel opening (8) and the bottom flow channel (10) respectively. The inner cavity of the fifth flow channel (15) is connected to the upper second flow channel opening (9) and the bottom flow channel (10) respectively.

6. The hydraulic main control valve body casting according to claim 1, characterized in that: The upper flow channel (8) and the upper second flow channel (9) are symmetrically arranged, and the two sets of upper risers (6) and the upper second risers (7) are distributed at equal intervals.

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