Hydraulic components multifunctional control valve body castings

Abstract

The present invention relates to a hydraulic component multifunctional control valve body casting, comprising a main body, a transverse main flow channel, a first longitudinal flow channel, a second longitudinal flow channel, and a third longitudinal flow channel. The front side of the main body is designed with a front flow channel opening and a front second flow channel opening, the rear side of the main body is designed with a rear flow channel opening, the left side of the main body is designed with a left flow channel opening, the right side of the main body is designed with a right flow channel opening, a transverse main flow channel is designed in the middle of the main body, the left end of the transverse main flow channel is connected to the left flow channel opening, the right end of the transverse main flow channel is connected to the right flow channel opening, and seven annular grooves are designed on the transverse main flow channel, which are respectively the first annular groove, the second annular groove, the third annular groove, the fourth annular groove, the fifth annular groove, the sixth annular groove, and the seventh annular groove from left to right. The advantages are ingenious design, reasonable and compact structure, convenient production and processing, and high molding rate.

Description

Technical Field

[0001] The invention relates to the field of valve body manufacturing, and in particular to a hydraulic component multifunctional control valve body casting. Background Art

[0002] In order to adapt to market demand, hydraulic valves are constantly updated and improved, and the degree of automation control is constantly improving. In order to meet market requirements, the SKP160 electro-hydraulic multifunctional control valve was independently developed. With the continuous development of engineering machinery and the improvement of automation, the SKP160 electro-hydraulic multifunctional control valve has excellent control performance, thus meeting the increasing requirements of domestic and foreign markets. The valve body was originally made of HT300 material. Due to the harsh working conditions and high pressure-bearing strength of this product, ordinary HT300 cannot meet the due requirements, and the fatigue test cannot reach 3 million times, so it is considered to be changed to QT500-7, which increases the service life of the valve body, conforms to market demand, and has great development prospects. Due to the uneven wall thickness of the valve body and the obstruction of the shrinkage channel, shrinkage holes are easily generated inside. In addition, the irregular shape, the lack of a suitable pouring and riser position, and the unsmooth exhaust of the mud core will cause pores on the surface of the valve body. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes a hydraulic component multifunctional control valve body casting, which has a clever design, a reasonable and compact structure, and meets production needs.

[0004] The technical solution of the present invention:

[0005] The multifunctional control valve body casting of hydraulic components comprises a main body, a transverse main flow channel, a first longitudinal flow channel, a second longitudinal flow channel, and a third longitudinal flow channel.

[0006] The front side of the main body is designed with a front first-flow opening and a front second-flow opening, the rear side of the main body is designed with a rear first-flow opening, the left side of the main body is designed with a left first-flow opening, and the right side of the main body is designed with a right first-flow opening.

[0007] A transverse main channel is designed in the middle of the main body. The left end of the transverse main channel is connected to the left primary flow outlet, and the right end of the transverse main channel is connected to the right primary flow outlet.

[0008] There are seven ring grooves designed on the transverse main channel, which are the first ring groove, the second ring groove, 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.

[0009] The first longitudinal flow channel and the second longitudinal flow channel are arranged at the front side of the transverse main flow channel and the first longitudinal flow channel and the second longitudinal flow channel are respectively perpendicular to the transverse main flow channel, the first longitudinal flow channel is located on the left side of the second longitudinal flow channel, the front end of the first longitudinal flow channel is connected to the previous flow channel opening, and the front end of the second longitudinal flow channel is connected to the first two flow channel openings,

[0010] The rear end of the first longitudinal flow channel is provided with an eighth annular groove, and the rear end of the second longitudinal flow channel is provided with a ninth annular groove.

[0011] The third longitudinal flow channel is arranged at the rear side of the transverse main flow channel and is perpendicular to the transverse main flow channel, and the rear end of the third longitudinal flow channel is connected to the rear flow channel opening; the front end of the second longitudinal flow channel is provided with a tenth annular groove;

[0012] The front side of the second ring groove is connected to the left side of the eighth ring groove through the first L-shaped flow channel; the front side of the sixth ring groove is connected to the left side of the ninth ring groove through the second L-shaped flow channel; the front side of the third ring groove is connected to the left side of the tenth ring groove through the third L-shaped flow channel.

[0013] The openings on both sides of the transverse main flow channel are designed to be trumpet-shaped, and the openings of the first longitudinal flow channel, the second longitudinal flow channel, and the third longitudinal flow channel are also designed to be trumpet-shaped.

[0014] The seventh annular groove is provided as an extended annular groove.

[0015] The main body is configured as a rectangular body, and an L-shaped step is respectively arranged at the four corners of the main body, and a cylinder is respectively arranged vertically at the root of the L-shaped step on both sides of the front end of the main body.

[0016] During the production process of the hydraulic component multifunctional control valve body casting, a cavity in a sand box is made according to the product shape, and then mud cores of the transverse main channel, the first longitudinal channel, the second longitudinal channel, the third longitudinal channel and the mud cores of the remaining channels of the matching L-shaped channel are manufactured according to the flow channel structure design of the product. Then, the mud core is placed in the cavity of the sand box, the sand box is closed, and molten iron is poured from the reserved pouring riser. After waiting for cooling, the sand box is opened, the valve body casting is taken out, and the internal mud core is cleaned and discharged to complete the processing.

[0017] The mud core is designed with exhaust holes. When the mud core is made, a rectangular mud core is also provided. The outer ends of the mud cores of the transverse main channel, the first longitudinal channel, the second longitudinal channel and the third longitudinal channel are respectively connected to the inner wall of the rectangular mud core to form a whole. An air-penetrating needle is placed at the center of the front side frame of the rectangular mud core. An air-penetrating needle is also placed at the center of the mud cores of the first longitudinal channel and the second longitudinal channel. The air-penetrating needles in the middle of the mud cores of the first longitudinal channel and the second longitudinal channel are in contact with the air-penetrating needles at the center of the front side frame of the rectangular mud core. After the mud core is formed, the air-penetrating needles are respectively pulled out to form exhaust holes. Then the whole mud core is placed in a sand box for pouring.

[0018] The pouring and rising mouth is reserved outside the mud core of the first longitudinal runner and the second longitudinal runner. When pouring, the mud core of the first longitudinal runner and the second longitudinal runner is set upward. In the molding process, we use the method of automatic line sand shell, the coated sand shell improves the surface roughness of the product, and the automatic line molding improves the compactness of the cavity to prevent the deformation and breakage of the runner caused by the expansion of the shape box.

[0019] The advantages of the present invention are ingenious design, reasonable and compact structure, convenient production and processing, and high forming rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This invention is a schematic diagram Figure 1 .

[0021] Figure 2 This invention is a schematic diagram Figure 2 .

[0022] Figure 3 This invention is a schematic diagram Figure 3 .

[0023] Figure 4 It is a transverse sectional top view of the present invention.

[0024] Figure 5 It is a vertical cross-sectional schematic diagram of the first L-shaped flow channel of the present invention.

[0025] Figure 6 It is a vertical cross-sectional schematic diagram of the third L-shaped flow channel of the present invention.

[0026] Figure 7 It is a vertical cross-sectional schematic diagram of the third longitudinal flow channel of the present invention.

[0027] Figure 8 It is a vertical cross-sectional schematic diagram of the second L-shaped flow channel of the present invention. DETAILED DESCRIPTION

[0028] See attached Figure 1-8 , a hydraulic component multifunctional control valve body casting, which includes a main body 1, a transverse main flow channel 2, a first longitudinal flow channel 11, a second longitudinal flow channel 12, and a third longitudinal flow channel 13,

[0029] The front side of the main body 1 is designed with a front first flow channel 101 and a front second flow channel 102, the rear side of the main body 1 is designed with a rear first flow channel 103, the left side of the main body 1 is designed with a left first flow channel 104, and the right side of the main body 1 is designed with a right first flow channel 105.

[0030] A transverse main flow channel 2 is designed in the middle of the main body 1. The left end of the transverse main flow channel 2 is connected to the left primary flow channel opening 104, and the right end of the transverse main flow channel 2 is connected to the right primary flow channel opening 105.

[0031] Seven annular grooves are designed on the transverse main channel 2, which are the first annular groove 201, the second annular groove 202, the third annular groove 203, the fourth annular groove 204, the fifth annular groove 205, the sixth annular groove 206 and the seventh annular groove 207 from left to right.

[0032] The first longitudinal flow channel 11 and the second longitudinal flow channel 12 are arranged at the front side of the transverse main flow channel 2 and are respectively perpendicular to the transverse main flow channel 2. The first longitudinal flow channel 11 is located on the left side of the second longitudinal flow channel 12. The front end of the first longitudinal flow channel 11 is connected to the previous flow channel opening 101, and the front end of the second longitudinal flow channel 12 is connected to the previous second flow channel opening 102.

[0033] An eighth annular groove 208 is disposed at the rear end of the first longitudinal flow channel 11, and a ninth annular groove 209 is disposed at the rear end of the second longitudinal flow channel 12.

[0034] The third longitudinal flow channel 13 is arranged at the rear side of the transverse main flow channel 2 and is perpendicular to the transverse main flow channel 2. The rear end of the third longitudinal flow channel 13 is connected to the rear flow channel opening 103. The front end of the second longitudinal flow channel 12 is provided with a tenth annular groove 210.

[0035] The front side of the second annular groove 202 is connected to the left side of the eighth annular groove 208 through the first L-shaped flow channel 301; the front side of the sixth annular groove 206 is connected to the left side of the ninth annular groove 209 through the second L-shaped flow channel 302; the front side of the third annular groove 203 is connected to the left side of the tenth annular groove 210 through the third L-shaped flow channel 303.

[0036] The openings on both sides of the transverse main flow channel 2 are designed to be trumpet-shaped, and the openings of the first longitudinal flow channel 11, the second longitudinal flow channel 12, and the third longitudinal flow channel 13 are also designed to be trumpet-shaped.

[0037] The seventh annular groove 207 is configured as an extended annular groove.

[0038] The main body 1 is configured as a rectangular body, and an L-shaped step is disposed at each of the four corners of the main body 1 , and a cylinder is vertically disposed at the root of the L-shaped step on both sides of the front end of the main body 1 .

[0039] During the production process of the hydraulic component multifunctional control valve body casting, a cavity in a sand box is made according to the product shape, and then mud cores of the transverse main channel, the first longitudinal channel, the second longitudinal channel, the third longitudinal channel and the mud cores of the remaining channels of the matching L-shaped channel are manufactured according to the flow channel structure design of the product. Then, the mud core is placed in the cavity of the sand box, the sand box is closed, and molten iron is poured from the reserved pouring riser. After waiting for cooling, the sand box is opened, the valve body casting is taken out, and the internal mud core is cleaned and discharged to complete the processing.

[0040] The mud core is designed with exhaust holes. When the mud core is made, a rectangular mud core is also provided. The outer ends of the mud cores of the transverse main channel, the first longitudinal channel, the second longitudinal channel and the third longitudinal channel are respectively connected to the inner wall of the rectangular mud core to form a whole. An air-penetrating needle is placed at the center of the front side frame of the rectangular mud core. An air-penetrating needle is also placed at the center of the mud cores of the first longitudinal channel and the second longitudinal channel. The air-penetrating needles in the middle of the mud cores of the first longitudinal channel and the second longitudinal channel are in contact with the air-penetrating needles at the center of the front side frame of the rectangular mud core. After the mud core is formed, the air-penetrating needles are respectively pulled out to form exhaust holes. Then the whole mud core is placed in a sand box for pouring. The rectangular mud core design is to prevent the mud cores of the transverse main flow channel, the first longitudinal flow channel, the second longitudinal flow channel, and the third longitudinal flow channel from being easily broken when combined. In particular, the transverse main flow channel is longer and more prone to breaking. A rectangular mud core is used to support and stabilize it from all sides to ensure the overall stability of the mud core; the exhaust hole design solves the problem of pores being formed on the surface near the mud cores of the first longitudinal flow channel and the second longitudinal flow channel after casting. The exhaust hole can well discharge the mud cores of the first longitudinal flow channel and the second longitudinal flow channel to form finished pores;

[0041] The pouring and riser positions are reserved on the outside between the mud cores of the first longitudinal runner and the second longitudinal runner, and the mud cores of the first longitudinal runner and the second longitudinal runner are set upward during pouring. The pouring and riser positions of the present invention are selected so that products with irregular shapes can be effectively compensated for evenly without shrinkage. The exhaust hole design position and the pouring and riser design of the present invention complement each other. The main pouring and riser positions are selected to have a high overall molding qualification rate for the product. The exhaust holes also solve the problem that the mud cores of the first longitudinal runner and the second longitudinal runner are close to the pouring and risers and are not easy to exhaust the core head, which not only ensures the molding qualification rate, but also ensures the exhaust problem of the mud core.

[0042] For the molding process, we use the method of automatic line sand shell falling, the coated sand shell improves the surface roughness of the product, and the automatic line molding improves the compactness of the cavity to prevent the deformation and breakage of the runner caused by the expansion of the shape.

[0043] In test 1, the mud core uses Jiangyin 9218 mud core sand, with a strength of 4.5, a gas emission of 16, and a casting temperature of 1415 degrees. The mud core is not vented, and 50% of the surface has slag pores;

[0044] In the second test, after the mud core was vented, the mud core sand was changed to low-gas-generating HA9218 sand, with a sand strength of 4.5, a gas-generating volume of 12, and a casting temperature of 1420 degrees. 100 pieces were made, and 2 were unqualified. The effect was very obvious, which greatly improved the product yield.

[0045] Main technical indicators of the product:

[0046] 1. Valve body weight: 7KG;

[0047] 2. Material requirements: QT500-7;

[0048] 3. Spheroidization rate: Level 3;

[0049] 4. Hardness requirement: HB200-260;

[0050] 5. Tensile strength at room temperature: ≥1.8Mpa;

[0051] 6. Bending strength at room temperature: ≥8.8Mpa;

[0052] 7. Gas emission: ≤12ml / g;

[0053] 8. No casting defects such as pores and shrinkage holes.

Claims

1. Multifunctional control valve body casting of hydraulic components, characterized in that: It includes a main body, a transverse main flow channel, a first longitudinal flow channel, a second longitudinal flow channel, and a third longitudinal flow channel. The front side of the main body is designed with a front first-flow opening and a front second-flow opening, the rear side of the main body is designed with a rear first-flow opening, the left side of the main body is designed with a left first-flow opening, and the right side of the main body is designed with a right first-flow opening. A transverse main channel is designed in the middle of the main body. The left end of the transverse main channel is connected to the left primary flow outlet, and the right end of the transverse main channel is connected to the right primary flow outlet. There are seven ring grooves designed on the transverse main channel, which are the first ring groove, the second ring groove, 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 first longitudinal flow channel and the second longitudinal flow channel are arranged at the front side of the transverse main flow channel and the first longitudinal flow channel and the second longitudinal flow channel are respectively perpendicular to the transverse main flow channel, the first longitudinal flow channel is located on the left side of the second longitudinal flow channel, the front end of the first longitudinal flow channel is connected to the previous flow channel opening, and the front end of the second longitudinal flow channel is connected to the first two flow channel openings, The rear end of the first longitudinal flow channel is provided with an eighth annular groove, and the rear end of the second longitudinal flow channel is provided with a ninth annular groove. The third longitudinal flow channel is arranged at the rear side of the transverse main flow channel and is perpendicular to the transverse main flow channel, and the rear end of the third longitudinal flow channel is connected to the rear flow channel opening; the front end of the second longitudinal flow channel is provided with a tenth annular groove; The front side of the second annular groove is connected to the left side of the eighth annular groove through the first L-shaped flow channel; the front side of the sixth annular groove is connected to the left side of the ninth annular groove through the second L-shaped flow channel; the front side of the third annular groove is connected to the left side of the tenth annular groove through the third L-shaped flow channel; The openings on both sides of the transverse main flow channel are designed to be trumpet-shaped, and the openings of the first longitudinal flow channel, the second longitudinal flow channel, and the third longitudinal flow channel are also designed to be trumpet-shaped. The seventh annular groove is configured as an extended annular groove; the main body is configured as a rectangular body, and an L-shaped step is respectively configured at the four corners of the main body, and a cylinder is respectively configured vertically at the root of the L-shaped step on both sides of the front end of the main body; During the production process of the hydraulic component multifunctional control valve body casting, a cavity in a sand box is made according to the product shape, and then mud cores of the transverse main flow channel, the first longitudinal flow channel, the second longitudinal flow channel, the third longitudinal flow channel and the mud cores of the remaining flow channels of the L-shaped flow channel are designed and manufactured according to the flow channel structure of the product. Then, the mud core is placed in the cavity of the sand box, the sand box is closed, and molten iron is poured in from the reserved pouring and riser. After cooling, the sand box is opened, the valve body casting is taken out, and the internal mud core is cleaned and guided out to complete the processing. An exhaust hole is designed in the mud core. When the mud core is made, a rectangular mud core is also provided. The transverse main flow channel, the first longitudinal flow channel, the second longitudinal flow channel, the third longitudinal flow channel, The outer ends of the mud core of the flow channel are respectively connected to the inner wall of the rectangular mud core to form a whole; an air penetration needle is placed at the center of the front side frame of the rectangular mud core, and an air penetration needle is also placed in the center of the mud core of the first longitudinal flow channel and the second longitudinal flow channel respectively. The air penetration needles in the middle of the mud cores of the first longitudinal flow channel and the second longitudinal flow channel are in contact with the air penetration needles at the center of the front side frame of the rectangular mud core; after the mud core is formed, the air penetration needles are respectively pulled out to form exhaust holes; then the whole mud core is placed in a sand box for pouring; the pouring head position is reserved on the outside between the mud cores of the first longitudinal flow channel and the second longitudinal flow channel, and the mud cores of the first longitudinal flow channel and the second longitudinal flow channel are set upward during pouring.

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