Turbine shell casting mold

Abstract

The utility model belongs to the technical field of turbine shell machining, and relates to a turbine shell casting mold which comprises a lower mold and an upper mold, the upper mold and the lower mold vertically correspond to each other, mounting grooves are formed in the two ends of the bottom face of the upper mold, and rotating plates are rotationally arranged in the two mounting grooves. Pressing blocks are arranged at the bottoms of the ends, close to each other, of the two rotating plates and vertically penetrate through the bottom of the upper mold in a sliding mode, hydraulic cylinders are fixedly connected to the two sides of the lower mold and correspond to the mounting grooves one to one, ejector rods are fixedly connected to the output ends of the hydraulic cylinders, and the ejector rods are movably arranged in the corresponding mounting grooves; the ejector rod abuts against the end, away from the pressing block, of the rotating plate. The utility model has the advantages that during demoulding, the push block pushes one end of the rotating plate, so that the other end of the rotating plate pushes the pressing block to move downwards, the pressing block pushes a flange formed in the lower mould downwards, separate driving is not needed, and the operation is simpler and more convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to turbine shell processing technical field relates to a turbine shell casting mould. BACKGROUND

[0002] The turbine shell includes a spiral-shaped vortex chamber and an expansion pipe. In order to facilitate subsequent assembly, the turbine shell is usually made into a half-split type, and a flange is arranged on the half turbine shell for fixation. Therefore, the turbine shell needs to be cast separately, and a casting mold is required.

[0003] A pump volute casting mold is disclosed in Chinese Patent CN219852077U, which includes a lower mold body, an upper mold body, a lifting assembly, a pouring channel, a ejector pin, and an auxiliary demolding assembly. The auxiliary demolding assembly includes a first telescopic member and a second telescopic member. The first telescopic member is installed in the housing, and the outer end of the first telescopic member abuts against the flange end face on the guide channel of the pump volute. The second telescopic member is installed in the housing, and is arranged on the side of the cavity of the pump volute away from the guide channel. The movable end of the second telescopic member abuts against the flange end face at the cavity of the pump volute.

[0004] When using the casting mold, the lifting drive mechanism needs to cooperate with the first telescopic member and the second telescopic member, and the lifting drive mechanism, the first telescopic member, and the second telescopic member need to be operated respectively to leave the pump volute in the mold groove. Moreover, when demolding, the first telescopic member and the second telescopic member need to be operated again to move away from the pump volute, which makes the operation more complicated.

[0005] To solve the above problems, the utility model provides a turbine shell casting mold. Utility model content

[0006] To solve the problems in the background art, the utility model provides a turbine shell casting mold.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme: a lower mold and an upper mold, the upper mold and the lower mold correspond to each other, both ends of the bottom surface of the upper mold are provided with installation grooves, both the installation grooves are provided with rotating plates rotatingly, the bottom of one end of both the rotating plates close to each other is provided with a pressing block, and the pressing block vertically slides through the bottom of the upper mold;

[0008] Both sides of the lower mold are fixedly connected with hydraulic cylinders, the hydraulic cylinders correspond to the installation grooves one by one, the output end of the hydraulic cylinder is fixedly connected with a ejector pin, the ejector pin is movably arranged in the corresponding installation groove, and the ejector pin and the rotating plate abut and cooperate with one end away from the pressing block.

[0009] Further, the top end of each of the two top rods is fixedly connected with a spring, and the top end of the spring is fixedly connected to the inner wall of the top of the installation groove.

[0010] Further, a rotating shaft is fixedly penetrated through the middle part of each of the two rotating plates, and the two ends of the rotating shaft are rotationally connected to the upper mold;

[0011] The two ends of each of the two rotating shafts are sleeved with a torsion spring, one end of the torsion spring is fixedly connected with the upper mold, and the other end of the torsion spring is fixedly connected to one side of the corresponding rotating plate.

[0012] Further, a recess is formed in one end of each of the two rotating plates close to each other, the top end of the pressing block is arranged in the recess, and a connecting shaft is fixedly connected in the recess.

[0013] A sliding groove is formed in the top of the pressing block, the connecting shaft is slidingly connected in the sliding groove.

[0014] Further, the top of the lower mold is provided with an injection cavity, the inside of the injection cavity is provided with a turbine shell, the top end of the turbine shell is fixedly connected with a flange, the bottom of the upper mold is fixedly provided with a protrusion matched with the injection cavity, and the upper mold is provided with an injection hole.

[0015] Further, a push block is fixedly connected to the top of the outer surface of the top rod, and the top end of the push block is movably arranged at the bottom of one end of the rotating plate.

[0016] Compared with the prior art, the turbine shell casting mold has the following beneficial effects:

[0017] 1. The turbine shell casting mold is provided with a pressing block, the pressing block is arranged at one end of a rotating plate and slidingly penetrates the bottom of the upper mold, when demolding, the output end of the hydraulic cylinder pushes the top rod and the push block to move upwards, the push block pushes one end of the rotating plate upwards, the rotating plate rotates, the other end of the rotating plate pushes the pressing block downwards, the pressing block pushes the flange formed in the lower mold downwards, the flange and the turbine shell are left in the injection cavity of the lower mold, the flange is pushed downwards while the upper mold is moved upwards, and the flange does not need to be driven separately, so that the operation is more convenient.

[0018] 2. The turbine shell casting mold is provided with a torsion spring at the two ends of each of the two rotating shafts, when the upper mold is moved downwards to be combined, the output end of the hydraulic cylinder drives the push block to move downwards, after the mold is combined, the push block gradually leaves one end of the rotating plate, the rotating plate is rotated to a horizontal state under the action of the torsion spring, the pressing block can be automatically moved to the inside of the upper mold, and the turbine shell casting mold is convenient to continue to use and has high automation degree. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the lower mold and the upper mold of the turbine shell casting mold;

[0020] Figure 2 is the utility model Figure 1 structure schematic diagram of A part of the utility model is enlarged;

[0021] Figure 3 is the structure schematic diagram of the rotating plate in the utility model;

[0022] Figure 4 is the structure schematic diagram of the turbine shell in the utility model.

[0023] In the drawing: 1, lower mould;2, hydraulic cylinder;3, ejector rod;4, push block;5, upper mould;6, rotating shaft;7, rotating plate;8, pressing block;9, sliding slot;10, spring;11, liquid injection hole;12, turbine shell;13, flange;14, installation slot. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] As Figures 1-4 shown, the technical scheme adopted by the utility model is as follows: a turbine shell casting mold, comprising lower mould 1 and upper mould 5, and upper mould 5 and lower mould 1 correspond in up and down.

[0026] The top of lower mould 1 is provided with injection cavity, and injection cavity is provided with turbine shell 12 inside. The top end of turbine shell 12 is fixedly connected with flange 13, and the two turbine shells 12 are connected through flange 13. The bottom of upper mould 5 is fixedly provided with the projection matched with injection cavity. When upper mould 5 and lower mould 1 are closed, the projection is located at the top inside injection cavity, thereby forming the pouring mold cavity of turbine shell 12.

[0027] Injection hole 11 is formed in upper mould 5. The bottom end of injection hole 11 is arranged at the side of projection, so that injection liquid enters pouring mold cavity through injection hole 11, and turbine shell 12 and flange 13 are formed in pouring mold cavity.

[0028] The bottom surface of upper mould 5 is provided with installation slot 14 at both ends, and rotating plate 7 is rotatably arranged in the inside of two installation slots 14.

[0029] The middle part of two rotating plates 7 is fixedly penetrated with rotating shaft 6, and the two ends of rotating shaft 6 are rotatably connected to upper mould 5. Rotating shaft 6 positions rotating plate 7 on upper mould 5.

[0030] Both ends of the two rotating shafts 6 are sleeved with torsional springs, one end of the torsional spring is fixedly connected with the upper die 5, and the other end is fixedly connected with one side of the corresponding rotating plate 7. In the initial state, the torsional spring drives the rotating plate 7 to rotate to the horizontal state.

[0031] The bottom of the end of the two rotating plates 7 close to each other is provided with a pressing block 8, and the pressing block 8 vertically slides through the bottom of the upper die 5. When the rotating plate 7 rotates, the pressing block 8 will slide vertically up and down in the upper die 5. When the rotating plate 7 is in the horizontal state, the bottom surface of the pressing block 8 is flush with the bottom surface of the upper die 5.

[0032] The end close to each other of the two rotating plates 7 is provided with a groove, and the top end of the pressing block 8 is arranged in the groove. The inside of the groove is fixedly connected with a connecting shaft.

[0033] The top of the pressing block 8 is provided with a sliding groove 9, and the sliding groove 9 is horizontally arranged, and the connecting shaft is slidingly connected in the inside of the sliding groove 9. When the rotating plate 7 rotates, the rotating plate 7 drives the connecting shaft to move, and the connecting shaft slides in the inside of the sliding groove 9, thereby driving the pressing block 8 to move up and down.

[0034] The two sides of the lower die 1 are fixedly connected with hydraulic cylinders 2, and the hydraulic cylinders 2 correspond to the mounting grooves 14 one by one. The output end of the hydraulic cylinder 2 is fixedly connected with a ejector rod 3, and the ejector rod 3 is movably arranged in the corresponding mounting groove 14.

[0035] The top end of the two ejector rods 3 is fixedly connected with a spring 10, and the top end of the spring 10 is fixedly connected to the inner wall of the top of the mounting groove 14. The hydraulic cylinder 2 drives the upper die 5 to move up and down through the spring 10.

[0036] The ejector rod 3 abuts with the end of the rotating plate 7 away from the pressing block 8.

[0037] The top of the ejector rod 3 is fixedly connected with a push block 4, and the top end of the push block 4 is movably arranged at the bottom of one end of the rotating plate 7. The push block 4 is slidingly connected with the inner wall of the mounting groove 14.

[0038] Working principle:

[0039] In use, the hydraulic cylinder 2 is started, the output end of the hydraulic cylinder 2 pulls down the ejector rod 3, and the ejector rod 3 drives the push block 4 to move downward. The ejector rod 3 pulls down the spring 10, and at the same time, under the action of the gravity of the upper die 5, the upper die 5 moves downward together.

[0040] When moving downward, the upper die 5 continues to compress the spring 10, so that the push block 4 pushes the rotating plate 7. The rotating plate 7 drives the torsional spring to twist, and the bottom end of the pressing block 8 extends downward to the outside of the upper die 5.

[0041] When the upper mold 5 and the lower mold 1 are attached, the ejector rod 3 drives the push block 4 to continue to move downward. Since the upper mold 5 cannot move downward, the ejector rod 3 pulls the spring 10 downward, so that the spring 10 gradually recovers to the initial state, and then the spring 10 is stretched, so that the spring 10 has a downward pulling force on the upper mold 5, so that the upper mold 5 and the lower mold 1 are attached more tightly.

[0042] When the push block 4 moves downward, the push block 4 no longer pushes the rotating plate 7. The rotating plate 7 is driven to rotate under the action of the torsion spring, so that one end of the rotating plate 7 continues to abut against the push block 4, and the pressing block 8 moves upward. When the rotating plate 7 recovers to the horizontal state, the bottom surface of the pressing block 8 is flush with the bottom surface of the upper mold 5.

[0043] The protrusion at the bottom of the upper mold 5 is located at the top of the injection cavity in the lower mold 1, and the protrusion cooperates with the injection cavity to form a pouring cavity. The injection liquid is introduced into the pouring cavity through the injection hole 11, and the turbine shell 12 is formed in the pouring cavity, and the flange 13 is formed at the bottom position of the pressing block 8.

[0044] After the turbine shell 12 is cooled and formed, the hydraulic cylinder 2 pushes the spring 10 and the push block 4 upward through the ejector rod 3. After the spring 10 recovers to the initial state, the spring 10 is compressed, and after the top end of the push block 4 contacts one end of the rotating plate 7, the push block 4 pushes one end of the rotating plate 7 upward. The upper mold 5 moves upward.

[0045] When the upper mold 5 moves upward, the rotating plate 7 rotates, so that the other end of the rotating plate 7 pushes the pressing block 8 to move downward. The pressing block 8 pushes the flange 13 downward, so that the flange 13 and the turbine shell 12 are left in the lower mold 1. This avoids that the turbine shell 12 is adsorbed on the upper mold 5 during demolding, and then the turbine shell 12 can be taken out.

[0046] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A turbine shell casting mold characterized by, Including lower mould (1) and upper mould (5), upper mould (5) and lower mould (1) correspond, the bottom surface of the upper mould (5) is provided with installation slot (14) at both ends, the inside of two installation slots (14) is rotatably provided with rotating plate (7), the bottom of the end of two rotating plates (7) is rotatably provided with pressing block (8), and the pressing block (8) vertically slides through the bottom of the upper mould (5); The both sides of the lower mould (1) are fixedly connected with hydraulic cylinders (2), the hydraulic cylinders (2) correspond to the installation slots (14), the output end of the hydraulic cylinder (2) is fixedly connected with the top rod (3), the top rod (3) is movably arranged in the corresponding installation slot (14), and the top rod (3) is abutted with the end of the rotating plate (7) away from the pressing block (8).

2. A turbine shell casting mold according to claim 1, wherein: The top end of two top rods (3) is fixedly connected with spring (10), and the top end of the spring (10) is fixedly connected to the inner wall on the top of the installation slot (14).

3. A turbine shell casting mold according to claim 1, wherein: The middle part of two rotating plates (7) is fixedly penetrated with rotating shaft (6), and the both ends of the rotating shaft (6) are rotatably connected to the upper mould (5); The both ends of two rotating shafts (6) are sleeved with torsional springs, one end of the torsional spring is fixedly connected with the upper mould (5), and the other end of the torsional spring is fixedly connected to one side of the corresponding rotating plate (7).

4. A turbine shell casting mold according to claim 1, wherein: The end of two rotating plates (7) is rotatably provided with recess, and the top end of the pressing block (8) is rotatably provided with recess, and the inside of the recess is fixedly connected with connecting shaft. The top of the pressing block (8) is provided with a sliding slot (9), and the connecting shaft is slidably connected to the inside of the sliding slot (9).

5. A turbine shell casting mold according to claim 1, wherein: The top of the pressing block (8) is provided with a sliding slot (9), and the connecting shaft is slidably connected to the inside of the sliding slot (9).

6. A turbine shell casting mold according to claim 1, wherein: The top of the pressing block (8) is provided with a sliding slot (9), and the connecting shaft is slidably connected to the inside of the sliding slot (9). The top of the pressing block (8) is provided with a sliding slot (9), and the connecting shaft is slidably connected to the inside of the sliding slot (9). The top of the pressing block (8) is provided with a sliding slot (9), and the connecting shaft is slidably connected to the inside of the sliding slot (9). The top of the pressing block (8) is provided with a sliding slot (9), and the connecting shaft is slidably connected to the inside of the sliding slot (9).

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