A hydraulic five-valve casting feeding device
By designing a hydraulic five-valve casting feeding device, using a screw conveyor and pretreatment mechanism to disperse resin sand, combined with electric heating wire heating, the problems of porosity and agglomeration in hydraulic five-valve casting were solved, improving the forming quality and mechanical properties of the castings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANTAI AIDIORANG MACHINERY TECHNOLOGY CO LTD
- Filing Date
- 2025-09-22
- Publication Date
- 2026-07-31
AI Technical Summary
The casting process of hydraulic five-way valves has defects such as shrinkage porosity, core breakage, and dimensional deviation. In addition, resin sand casting is prone to producing porosity and agglomeration, which affects the mechanical properties and molding quality of the castings.
A hydraulic five-valve casting feeding device was designed, comprising a screw conveyor, a pretreatment mechanism, and a transition box. The resin sand is dispersed by the movement of the cross plate and rotating block, and combined with heating by electric heating wire, the uniformity and bonding performance of the resin sand are ensured.
It effectively reduces defects such as porosity and sand inclusions, improves the uniformity of resin sand and temperature control, and enhances the molding quality and mechanical properties of castings.
Smart Images
Figure CN224577638U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valve casting technology, specifically a hydraulic five-way valve casting feeding device. Background Technology
[0002] The internal structure of the hydraulic five-piece valve is complex, and the thickness of the core forming the oil passage varies greatly. Defects such as shrinkage porosity, core breakage, and dimensional deviations are prone to occur during production. Previously, domestic manufacturers used a two-piece assembly (the casting process is simple and easy to operate). However, the process disclosed this time is to cast two pieces together to produce a complete single-piece five-piece valve. After installation and verification, its mechanical performance is higher than that of the two-piece assembly. However, due to the extremely complex internal structure, narrow oil passage, and high pressure during operation (shrinkage porosity and sand holes must be avoided to prevent leakage and pressure relief from affecting the performance of the hydraulic control system), casting a single-piece five-piece valve is extremely difficult in terms of core technology.
[0003] The hydraulic five-valve casting feeding equipment is designed to "match the casting process requirements of hydraulic five-valve systems." Through the coordination of mechanical structure and control system, it transports resin sand (a mixture of raw sand, resin binder, and curing agent) from the storage stage to the sand mold (or die) of the five-valve casting. However, in resin sand casting, porosity defects are prone to occur during the sand mold hardening stage due to poor gas escape. This is because unreleased free gas in the mixture is trapped within the hardened resin film. Shrinkage defects are related to uneven sand mold compaction; localized loose areas form micropores due to insufficient feeding during metal solidification. Both significantly reduce the mechanical properties of the casting. Furthermore, when resin sand is statically piled up, the cross-linking reaction of resin molecules continues, accompanied by increased van der Waals forces and electrostatic forces between particles, easily forming agglomerates. This agglomeration leads to a decrease in the sand's fluidity index, making it difficult to reach fine cavities during mold filling, exacerbating forming defects such as incomplete filling and cold shuts, posing a serious threat to the forming quality of complex structure castings.
[0004] Therefore, those skilled in the art have provided a hydraulic five-valve casting feeding device to solve the problems mentioned above. Utility Model Content
[0005] The purpose of this utility model is to provide a hydraulic five-valve casting feeding device to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: A hydraulic five-valve casting feeding device includes a worktable, a screw conveyor, and a transition box. The screw conveyor is located on the upper part of the worktable, and the transition box is located on one side of the screw conveyor and fixedly connected to the worktable. A first pretreatment mechanism is located on the top of the transition box. The first pretreatment mechanism includes a feeding hopper, a first treatment box, and discharge holes. The feeding hopper is fixedly connected through and to the upper end of the transition box. The first treatment box is fixedly connected to the upper end of the feeding hopper. Several sets of discharge holes are opened at the bottom of the interior of the first treatment box, and the several sets of discharge holes are arranged at equal intervals. A second pretreatment mechanism is located on the outer wall of the transition box away from the screw conveyor. The second pretreatment mechanism includes an electric slide, an electric telescopic rod, a second conveying pipe, and a second treatment box. The electric slide is fixedly connected to the outer wall of the transition box away from the screw conveyor. The electric telescopic rod is fixedly connected to the bottom of the electric slide. The second treatment box is fixedly connected to the bottom of the electric telescopic rod. The second treatment box is connected to the transition box through a second conveying pipe, which is a corrugated pipe.
[0007] As a further embodiment of this utility model: the output end of the screw conveyor is fixedly connected to a first conveying pipe, and the end of the first conveying pipe is fixedly connected to a conveying cover, which is vertically and horizontally arranged with the first processing box.
[0008] As a further embodiment of this utility model: a driven gear is movably connected to the outer wall of the first processing box, a cross plate is movably connected to the inner side of the driven gear and the cross plate is close to the inner wall and bottom of the first processing box, a driving gear is rotatably connected to one end of the outer wall of the driven gear, a first servo motor is fixedly connected to the bottom end of the driving gear, a support plate is provided on the outer wall of the first processing box and the first servo motor is fixedly connected to the support plate, and the driving gear meshes with the driven gear.
[0009] As a further embodiment of this utility model: a rotating block is rotatably connected to the end of the second processing box away from the transition box, and a third conveying pipe is fixedly connected inside the rotating block. A sand inlet hole is opened at the top of the third conveying pipe, and a sand outlet hole is opened on the outer wall of the bottom of the third conveying pipe.
[0010] As a further embodiment of this utility model: an extension plate is fixedly connected to the bottom of the second processing box, a second servo motor is fixedly connected to the outer wall of the extension plate near the rotating block, a second bevel gear is fixedly connected to the power output end of the second servo motor, a first bevel gear is fixedly connected to the outer wall of the rotating block, the teeth of the first bevel gear and the second bevel gear abut and rotate, the first bevel gear and the second bevel gear are arranged perpendicularly, and the first bevel gear and the second bevel gear mesh.
[0011] As a further embodiment of this utility model: a lower mold base is fixedly connected to the end of the upper surface of the workbench away from the screw conveyor. Fixed frames are provided on both sides of the lower mold base and the fixed frames are fixedly connected to the workbench. A hydraulic cylinder is equipped at the top of the fixed frame. An upper mold base is fixedly connected to the power output end of the hydraulic cylinder after passing through the hydraulic cylinder. The upper mold base and the lower mold base are used to cast the components that make up the five-way valve.
[0012] Compared with the prior art, the beneficial effects of this utility model are: Because it is equipped with a first pretreatment mechanism, the continuous circular motion of the cross plate crushes and breaks up the clumps of resin sand, preventing the clumps of sand from directly entering subsequent stages (such as molding, casting, etc.). This reduces product defects caused by sand clumps (such as air holes, sand inclusions, etc.). Unclumped sand passes directly through the feeding hole, while clumps of sand are processed to meet the standards before entering the next process, ensuring that the resin sand entering the subsequent process has uniform particle size and consistent state, eliminating the need for manual sorting of clumps of sand.
[0013] Because of the second pretreatment mechanism, the third conveying pipe rotates eccentrically (not at the exact center) through a rotating block, creating a stirring action while conveying the resin sand. This further breaks up any remaining small sand clumps, resulting in a more uniform distribution of sand particles. At the same time, stirring prevents the resin sand from becoming uneven in density due to gravity accumulation during conveying, providing a more consistent raw material for subsequent molding (such as filling mold cavities). The heating wire on the outer wall of the conveying pipe can simultaneously heat the resin sand during stirring. This removes any trace moisture that may be present in the sand (avoiding porosity defects after molding) and allows for adjustment of the sand temperature according to process requirements, ensuring the bonding performance of the resin sand (resin has more stable bonding strength at suitable temperatures) and improving the molding quality of the final product. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of a hydraulic five-valve casting feeding device.
[0015] Figure 2 This is a schematic diagram of the screw conveyor and transition box in a hydraulic five-valve casting feeding device.
[0016] Figure 3 This is a schematic diagram of the first pretreatment mechanism in a hydraulic five-valve casting feeding device.
[0017] Figure 4 This is a schematic diagram of the second pretreatment mechanism in a hydraulic five-valve casting feeding device.
[0018] In the diagram: 1. Workbench; 2. Screw conveyor; 201. First conveying pipe; 202. Conveying cover; 3. Fixing frame; 4. Lower mold base; 5. Hydraulic cylinder; 6. Upper mold base; 7. Transition box; 8. First pretreatment mechanism; 801. Feed funnel; 802. First treatment box; 803. Driven gear; 804. Cross plate; 805. Discharge hole; 806. Drive gear; 807. First servo motor; 9. Second pretreatment mechanism; 901. Electric slide; 902. Electric telescopic rod; 903. Second conveying pipe; 904. Second treatment box; 905. Rotary block; 906. Third conveying pipe; 907. Sand inlet hole; 908. Sand outlet hole; 909. First bevel gear; 910. Extension plate; 911. Second servo motor; 912. Second bevel gear; 913. Heating wire. Detailed Implementation
[0019] 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.
[0020] Reference Figures 1-4The screw conveyor 2 is located on the upper end of the workbench 1, and the transition box 7 is located on one side of the screw conveyor 2 and fixedly connected to the workbench 1. A first pretreatment mechanism 8 is located on the top of the transition box 7. The first pretreatment mechanism 8 includes a feeding funnel 801, a first treatment box 802, and a discharge hole 805. The feeding funnel 801 is passed through and fixedly connected to the upper end of the transition box 7. The first treatment box 802 is fixedly connected to the upper end of the feeding funnel 801. Several sets of discharge holes 805 are opened at the bottom of the interior of the first treatment box 802, and the several sets of discharge holes 805 are arranged at equal intervals. A second pretreatment mechanism 9 is located on the outer wall of the transition box 7 away from the screw conveyor 2. The second pretreatment mechanism 9 includes an electric slide 901, an electric telescopic rod 902, a second conveying pipe 903, and a second treatment box 904. The outer wall of the transition box 7 away from the screw conveyor 2 is fixedly connected to... An electric slide table 901 is fixedly connected to an electric telescopic rod 902 at its bottom end. A second processing box 904 is fixedly connected to the bottom end of the electric telescopic rod 902. The second processing box 904 and the transition box 7 are connected by a second conveying pipe 903, which is a corrugated pipe. A first conveying pipe 201 is fixedly connected to the output end of the screw conveyor 2. A conveying cover 202 is fixedly connected to the end of the first conveying pipe 201. The conveying cover 202 and the first processing box 802 are arranged vertically and horizontally. A lower mold base 4 is fixedly connected to the end of the upper surface of the workbench 1 away from the screw conveyor 2. Fixed frames 3 are provided on both sides of the lower mold base 4 and are fixedly connected to the workbench 1. A hydraulic cylinder 5 is equipped at the top of the fixed frame 3. An upper mold base 6 is fixedly connected to the power output end of the hydraulic cylinder 5 after passing through the hydraulic cylinder 5. The upper mold base 6 and the lower mold base 4 are used to cast the components that make up the five-way valve. The resin sand is fed into the first pretreatment mechanism 8 by the screw conveyor 2 to break up the clumps of resin sand. It then enters the transition box 7 and then the second pretreatment mechanism 9. The resin sand is fed into the lower mold base 4 by the second pretreatment mechanism 9 and the resin sand in the lower mold base 4 is processed again to prevent air bubbles from being present in the resin sand. After the lower mold base 4 is filled, the hydraulic cylinder 5 is started, so that the hydraulic cylinder 5 drives the upper mold base 6 to fit with the lower mold base 4 to carry out the casting work; It should be added that the casting process is a mature existing technology, so there will be no need to describe in too much detail how to cast; It should be added that casting involves casting some components of the hydraulic five-way valve, not the entire valve itself.
[0021] Reference Figure 1 , 2 and Figure 3A driven gear 803 is movably connected to the outer wall of the first processing box 802. A cross plate 804 is fixedly connected to the inner side of the driven gear 803, and the cross plate 804 is close to the inner wall and bottom of the first processing box 802. A driving gear 806 is rotatably connected to one end of the outer wall of the driven gear 803. A first servo motor 807 is fixedly connected to the bottom end of the driving gear 806. A support plate is provided on the outer wall of the first processing box 802, and the first servo motor 807 is fixedly connected to the support plate. The driving gear 806 meshes with the driven gear 803. Start the screw conveyor 2, so that the screw conveyor 2 continuously feeds the resin sand into the first processing box 802 through the first conveying pipe 201 and the conveying cover 202; The first servo motor 807 is started, which drives the drive gear 806 to rotate. The drive gear 806 drives the driven gear 803 to rotate. The driven gear 803 rotates and drives the cross plate 804 connected to the inner side to perform continuous circular motion, and crushes the resin sand in the first processing box 802, so that the clumps of resin sand can be evenly dispersed and enter the feed funnel 801 through the discharge hole 805 in the first processing box 802, and then enter the transition box 7 through the feed funnel 801. It should be added that unagglomerated resin sand will directly enter the feed hopper 801 and the transition box 7 through the discharge hole 805. Agglomerated resin sand cannot pass through the discharge hole 805 normally, so it is processed by the continuously rotating cross plate 804 and, after being sufficiently dispersed, it passes through the discharge hole 805 normally to enter the subsequent process.
[0022] Reference Figure 1 , 2 and Figure 4 Inside the second processing box 904, at the end furthest from the transition box 7, a rotating block 905 is rotatably connected. Inside the rotating block 905, a third conveying pipe 906 is fixedly connected. The top of the third conveying pipe 906 has a sand inlet hole 907, and the bottom outer wall of the third conveying pipe 906 has a sand outlet hole 908. At the bottom of the second processing box 904, an extension plate 910 is fixedly connected. At the end of the extension plate 910 near the rotating block 905, a second servo motor 911 is fixedly connected. At the power output end of the second servo motor 911, a second bevel gear 912 is fixedly connected. At the outer wall of the rotating block 905, a first bevel gear 909 is fixedly connected. The teeth of the first bevel gear 909 and the second bevel gear 912 abut and are rotatably connected. The first bevel gear 909 and the second bevel gear 912 are arranged perpendicularly and mesh with each other. Start the second servo motor 911, which drives the second bevel gear 912 to rotate. The second bevel gear 912 drives the first bevel gear 909 to rotate. The first bevel gear 909 drives the rotating block 905 to rotate. The rotating block 905 drives the internal third conveying pipe 906 to rotate. The resin sand in the transition box 7 enters the second processing box 904 through the second conveying pipe 903, then enters the third conveying pipe 906 through the sand inlet hole 907 at the upper end of the third conveying pipe 906 in the second processing box 904, and then enters the lower mold base 4 through the sand outlet hole 908 of the third conveying pipe 906. The position of the second processing box 904 is adjusted by driving the electric slide table 901, and the height of the second processing box 904 is adjusted by the electric telescopic rod 902, so that the third conveying pipe 906 at the bottom of the second processing box 904 is moved to a suitable position. It should be added that the second conveying pipe 903 is a corrugated pipe, so when making horizontal and vertical adjustments, it can deform synchronously with the adjustment position without affecting the normal operation of the conveying work; The rotation of the rotating block 905 causes the third conveying pipe 906 to rotate. The third conveying pipe 906 is located on one side of the rotating block 905, not in the center. This allows the resin sand entering the lower mold base 4 to be stirred. The heating wire 913 sleeved on the outer wall of the third conveying pipe 906 can heat the resin sand during stirring.
[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A hydraulic five-way valve casting loading apparatus, characterized by, include; The workbench (1), the screw conveyor (2) and the transition box (7) are provided. The screw conveyor (2) is located on the upper end of the workbench (1), and the transition box (7) is located on one side of the screw conveyor (2) and is fixedly connected to the workbench (1). The first pretreatment mechanism (8) is located on the top of the transition box (7). The first pretreatment mechanism (8) includes a feeding funnel (801), a first treatment box (802), and a discharge hole (805). The upper end face of the transition box (7) is connected to the feeding funnel (801) through and fixedly connected to the feeding funnel (801). The upper end face of the feeding funnel (801) is fixedly connected to the first treatment box (802). The bottom of the first treatment box (802) is provided with several sets of discharge holes (805). The several sets of discharge holes (805) are arranged at equal intervals. The first pretreatment mechanism (8) is used to prevent resin sand from clumping. The second pretreatment mechanism (9) is located on the outer wall of the transition box (7) away from the screw conveyor (2). The second pretreatment mechanism (9) includes an electric slide (901), an electric telescopic rod (902), a second conveying pipe (903), and a second treatment box (904). The electric slide (901) is fixedly connected to the outer wall of the transition box (7) away from the screw conveyor (2). The electric telescopic rod (902) is fixedly connected to the bottom end of the electric slide (901). The second treatment box (904) is fixedly connected to the bottom end of the electric telescopic rod (902). The second treatment box (904) is connected to the transition box (7) through the second conveying pipe (903). The second conveying pipe (903) is a corrugated pipe. The second pretreatment mechanism (9) is used to prevent air bubbles from being present inside the resin sand after it enters the lower mold base.
2. The hydraulic five-way valve casting loading apparatus according to claim 1, wherein The output end of the screw conveyor (2) is movably connected to a first conveying pipe (201), and the end of the first conveying pipe (201) is fixedly connected to a conveying cover (202). The conveying cover (202) and the first processing box (802) are arranged vertically and horizontally.
3. The hydraulic five-way valve casting loading apparatus according to claim 1, wherein The first pretreatment mechanism (8) further includes a driven gear (803), a cross plate (804), a driving gear (806), and a first servo motor (807). The driven gear (803) is fixedly connected to the outer wall of the first processing box (802), and the cross plate (804) is fixedly connected to the inner side of the driven gear (803), and the cross plate (804) is close to the inner wall and bottom of the first processing box (802).
4. The hydraulic five-valve casting feeding device according to claim 3, characterized in that, The driven gear (803) is rotatably connected to the outer wall of one end of the driven gear (803), and the bottom end of the driven gear (806) is fixedly connected to the first servo motor (807). The outer wall of the first processing box (802) is provided with a support plate and the first servo motor (807) is fixedly connected to the support plate. The driven gear (806) meshes with the driven gear (803).
5. The hydraulic five-valve casting feeding device according to claim 1, characterized in that, The second pretreatment mechanism (9) includes a rotating block (905), a third conveying pipe (906), a sand inlet (907), a sand outlet (908), a first bevel gear (909), an extension plate (910), a second servo motor (911), a second bevel gear (912), and a heating wire (913). The rotating block (905) is rotatably connected to one end of the second treatment box (904) away from the transition box (7). The third conveying pipe (906) is fixedly connected inside the rotating block (905). The top end of the third conveying pipe (906) is provided with a sand inlet (907), and the bottom outer wall of the third conveying pipe (906) is provided with a sand outlet (908).
6. The hydraulic five-valve casting feeding device according to claim 5, characterized in that, An extension plate (910) is fixedly connected to the bottom of the second processing box (904). A second servo motor (911) is fixedly connected to the outer wall of the extension plate (910) near the rotating block (905). A second bevel gear (912) is fixedly connected to the power output end of the second servo motor (911). A first bevel gear (909) is fixedly connected to the outer wall of the rotating block (905). The teeth of the first bevel gear (909) and the second bevel gear (912) abut and rotate.
7. A hydraulic five-valve casting feeding device according to claim 6, characterized in that, The first bevel gear (909) and the second bevel gear (912) are arranged perpendicularly, and the first bevel gear (909) and the second bevel gear (912) mesh with each other.
8. The hydraulic five-valve casting feeding device according to claim 1, characterized in that, The upper end of the workbench (1) away from the screw conveyor (2) is fixedly connected to a lower mold base (4). The lower mold base (4) is provided with fixed frames (3) on both sides and the fixed frames (3) are fixedly connected to the workbench (1). The top of the fixed frame (3) is equipped with a hydraulic cylinder (5). The power output end of the hydraulic cylinder (5) passes through the hydraulic cylinder (5) and is fixedly connected to an upper mold base (6). The upper mold base (6) and the lower mold base (4) are used to cast the components that make up the five-way valve.