Polishing equipment for inner surface of valve casting

Abstract

The utility model discloses a valve casting inner surface polishing device which comprises a working table, a through hole is formed in the working table, a positioning concave ring corresponding to a valve casting is arranged on the working table on the periphery of the top of the through hole, a plurality of clamping blocks are arrayed on the working table on the periphery of the positioning concave ring, and the clamping blocks are connected to the working table in a telescopic mode in the radial direction of the through hole. The bottom of the workbench is further connected with a platform in a lifting mode, the top of the platform is rotationally connected with a polishing head, a driving motor is fixed to the bottom of the platform, and an output shaft of the driving motor is connected with the polishing head. The valve casting inner surface polishing machine can conduct semi-automatic polishing on the inner surface of a valve casting, manpower can be saved, and machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a device for polishing the inner surface of a valve casting, in particular to a device for polishing the inner surface of a ball valve casting. Background Art

[0002] After the valve casting is completed, its inner surface needs to be polished to ensure the reliability of the seal after installation and reduce the resistance of the fluid passing through;

[0003] In the prior art, the inner surface of the valve casting is generally polished by placing it on a workbench or on the ground, and workers hold polishing tools to polish it. Since the inner surface of the valve casting is roughly cylindrical or continuous cylindrical, the workers need to constantly turn the valve casting when polishing its inner surface, and the valve casting needs to be clamped during the polishing process to avoid displacement. Generally speaking, it is time-consuming and labor-intensive, and the processing efficiency is low. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a semi-automatic valve casting inner surface polishing device which can save manpower and improve processing efficiency.

[0005] The technical solution of the utility model is: a valve casting inner surface polishing device, comprising a workbench, the workbench has a through hole, the workbench on the outer periphery of the top of the through hole has a positioning concave ring corresponding to the valve casting, the workbench on the outer periphery of the positioning concave ring is arrayed with a plurality of clamping blocks, each of the clamping blocks is telescopically connected to the workbench along the radial direction of the through hole;

[0006] The bottom of the workbench is also connected to a platform for lifting, the top of the platform is rotatably connected to a polishing head, the bottom of the platform is fixed with a driving motor, and the output shaft of the driving motor is connected to the polishing head;

[0007] The polishing head is coaxially arranged with the through hole, and the polishing head is lifted and lowered along the through hole, and a distance is maintained between the outer periphery of the polishing head and the inner wall of the through hole.

[0008] Furthermore, the workbench is provided with a plurality of guide grooves corresponding to the clamping blocks, and a first hydraulic cylinder is fixed to the outer end of each guide groove, and the piston rod of each first hydraulic cylinder is fixed to the back side of the corresponding clamping block.

[0009] Furthermore, the clamping block has a boss on the front side, and an elastic damping layer is provided on the front side of the boss.

[0010] Furthermore, the platform includes an upper plate and a lower plate and a connecting rod connected between the upper plate and the lower plate, the polishing head is rotatably connected to the top of the upper plate, the drive motor is fixed to the top of the lower plate, and a plurality of rod bodies are arrayed on the outer periphery of the upper plate, and a slider is provided at the outer end of each rod body.

[0011] Furthermore, a plurality of supporting legs are provided at the bottom of the workbench, each supporting leg has a sliding groove corresponding to each slider, and each slider is slidably connected to the corresponding sliding groove.

[0012] Furthermore, the bottom of each of the supporting legs is respectively connected to a bottom plate, a second hydraulic cylinder is fixed to the middle of the bottom plate, and a piston rod of the second hydraulic cylinder is connected to the bottom of the lower plate.

[0013] Furthermore, it also includes a chip receiving groove, which is arranged on the bottom plate.

[0014] Furthermore, the chip receiving groove includes a first groove body and a second groove body, the first groove body has a avoidance groove corresponding to the second hydraulic cylinder, and the first groove body and the second groove body are combined to form an annular groove body.

[0015] The beneficial effects of the utility model are as follows: the utility model has a simple structure and can be adapted to the polishing of the main body, the left body and the right body of the ball valve casting, and can also be adapted to the polishing of various valve castings with holes, and only the corresponding polishing heads need to be replaced; since the valve casting is directly buckled on the workbench for polishing, the deadweight of the valve casting cooperates with the clamping of each clamping block, and the valve casting is not easily displaced during polishing; no manual participation is required in the entire polishing process, and semi-automatic processing is realized, which can save manpower; during the polishing process, the polishing head rotates and intermittently moves up and down under the action of the platform, which can ensure the polishing effect of the inner wall of the valve casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a top view of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the chip receiving groove in the utility model.

[0019] In the figure: workbench 1, through hole 2, positioning concave ring 3, clamping block 4, polishing head 5, drive motor 6, guide groove 7, first hydraulic cylinder 8, upper plate 9, lower plate 10, connecting rod 11, rod body 12, support foot 13, slide groove 14, bottom plate 15, second hydraulic cylinder 16, chip receiving groove 17, first trough body 18, second trough body 19. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0021] Combination Figure 1-3As shown, a valve casting inner surface polishing device comprises a workbench 1, the workbench 1 has a through hole 2, the workbench 1 has a positioning concave ring 3 corresponding to the valve casting on the top periphery of the through hole 2, and a plurality of clamping blocks 4 are arranged on the workbench 1 on the periphery of the positioning concave ring 3, and each of the clamping blocks 4 is telescopically connected to the workbench 1 along the radial direction of the through hole 2;

[0022] The bottom of the workbench 1 is also connected to a platform for lifting, the top of the platform is rotatably connected to a polishing head 5, the bottom of the platform is fixed with a driving motor 6, and the output shaft of the driving motor 6 is connected to the polishing head 5;

[0023] The polishing head 5 is coaxially arranged with the through hole 2 , and the polishing head 5 is lifted and lowered along the through hole 2 , and a distance is maintained between the outer periphery of the polishing head 5 and the inner wall of the through hole 2 .

[0024] The working principle of the above structure is: first select a polishing head 5 of a suitable shape according to the type of valve casting (main body, left body or right body), connect the polishing head 5 to the platform, and then buckle the valve casting on the positioning concave ring 3; after the valve casting is placed, each clamping block 4 moves toward the through hole 2, abuts against the outer periphery of the bottom of the valve casting to clamp it; the platform rises, so that the polishing head 5 abuts against the inner wall of the valve casting to polish the valve casting; during the polishing process, the polishing head 5 rotates under the action of the driving motor 6, and the platform moves up and down intermittently, so that the inner wall of the valve casting is effectively polished.

[0025] The beneficial effects of the above structure are: simple structure, can adapt to the polishing of the main body, left body and right body of the ball valve casting, and can also adapt to the polishing of various valve castings with holes, and can be replaced by the corresponding polishing head 5; because the valve casting is directly buckled on the workbench 1 for polishing, the dead weight of the valve casting cooperates with the clamping of each clamping block 4, and the valve casting is not easy to move during polishing; no manual participation is required in the entire polishing process, semi-automatic processing is realized, and manpower can be saved; during the polishing process, the polishing head 5 rotates and moves up and down intermittently under the action of the platform, which can ensure the polishing effect of the inner wall of the valve casting.

[0026] In another embodiment, in combination Figure 1 and Figure 2 As shown, the workbench 1 is provided with a plurality of guide grooves 7 corresponding to each clamping block 4, and a first hydraulic cylinder 8 is fixed to the outer end of each guide groove 7, and the piston rod of each first hydraulic cylinder 8 is fixed to the back side of the corresponding clamping block 4 to drive each clamping block 4 to move.

[0027] In another embodiment, if Figure 1 As shown, the clamp block 4 has a boss on the front side, and an elastic damping layer is provided on the front side of the boss to clamp the valve casting tightly against its surface.

[0028] In another embodiment, if Figure 1 As shown, the platform includes an upper plate 9 and a lower plate 10 and a connecting rod 11 connected between the upper plate 9 and the lower plate 10, the polishing head 5 is rotatably connected to the top of the upper plate 9, the driving motor 6 is fixed to the top of the lower plate 10, and a plurality of rod bodies 12 are arrayed on the periphery of the upper plate 9, and a slider is provided at the outer end of each of the rod bodies 12.

[0029] In another embodiment, if Figure 1 As shown, a plurality of legs 13 are provided at the bottom of the workbench 1 , each of the legs 13 has a slide groove 14 corresponding to each slider, and each slider is slidably connected to the corresponding slide groove 14 .

[0030] In another embodiment, if Figure 1 As shown, the bottom of each of the supporting legs 13 is respectively connected to a base plate 15, and a second hydraulic cylinder 16 is fixed to the middle of the base plate 15. The piston rod of the second hydraulic cylinder 16 is connected to the bottom of the lower plate 10 to drive the entire platform to move up and down. This structure cooperates with the platform and the sliders and slide grooves 14 on each of the supporting legs 13 to ensure the stability of the platform after lifting and lowering, and further ensure the stability of the rotation of the polishing head 5.

[0031] In another embodiment, if Figure 1 As shown, a chip collecting groove 17 is also included. The chip collecting groove 17 is arranged on the bottom plate 15 and is used to collect dust and debris generated during the polishing process.

[0032] In another embodiment, if Figure 3 As shown, the chip receiving groove 17 includes a first groove body 18 and a second groove body 19. The first groove body 18 has a avoidance groove corresponding to the second hydraulic cylinder 16. The first groove body 18 and the second groove body 19 are combined to form an annular groove body to cover the bottom of the entire through hole 2 and facilitate pulling out from the bottom plate 15.

Claims

1. A valve casting inner surface polishing device, comprising a workbench (1), characterized in that: The workbench (1) has a through hole (2), the workbench (1) has a positioning concave ring (3) corresponding to the valve casting on the outer periphery of the top of the through hole (2), and a plurality of clamping blocks (4) are arranged in an array on the workbench (1) on the outer periphery of the positioning concave ring (3), and each of the clamping blocks (4) is telescopically connected to the workbench (1) along the radial direction of the through hole (2); The bottom of the workbench (1) is also connected to a platform in a lifting manner, the top of the platform is rotatably connected to a polishing head (5), the bottom of the platform is fixed with a driving motor (6), and the output shaft of the driving motor (6) is connected to the polishing head (5); The polishing head (5) is coaxially arranged with the through hole (2); the polishing head (5) is lifted and lowered along the through hole (2); and a distance is maintained between the outer periphery of the polishing head (5) and the inner wall of the through hole (2).

2. A valve casting inner surface polishing device as claimed in claim 1, characterized in that: The workbench (1) is provided with a plurality of guide grooves (7) corresponding to the clamping blocks (4), and a first hydraulic cylinder (8) is fixed to the outer end of each guide groove (7), and the piston rod of each first hydraulic cylinder (8) is fixed to the back side of the corresponding clamping block (4).

3. A valve casting inner surface polishing device as claimed in claim 2, characterized in that: The clamping block (4) has a boss on the front side, and an elastic damping layer is provided on the front side of the boss.

4. A valve casting inner surface polishing device as claimed in claim 3, characterized in that: The platform comprises an upper plate (9) and a lower plate (10) and a connecting rod (11) connected between the upper plate (9) and the lower plate (10); the polishing head (5) is rotatably connected to the top of the upper plate (9); the driving motor (6) is fixed to the top of the lower plate (10); and a plurality of rod bodies (12) are arranged in an array on the outer periphery of the upper plate (9); and a slider is provided at the outer end of each of the rod bodies (12).

5. A valve casting inner surface polishing device as claimed in claim 4, characterized in that: The bottom of the workbench (1) is provided with a plurality of supporting legs (13), each supporting leg (13) having a slide groove (14) corresponding to each slider, and each slider is slidably connected to the corresponding slide groove (14).

6. A valve casting inner surface polishing device as claimed in claim 5, characterized in that: The bottom of each support leg (13) is respectively connected to a base plate (15), a second hydraulic cylinder (16) is fixed in the middle of the base plate (15), and the piston rod of the second hydraulic cylinder (16) is connected to the bottom of the lower plate (10).

7. A valve casting inner surface polishing device as claimed in claim 6, characterized in that: It also comprises a chip receiving groove (17), wherein the chip receiving groove (17) is arranged on the bottom plate (15).

8. The valve casting inner surface polishing device as claimed in claim 7, characterized in that: The chip receiving groove (17) comprises a first groove body (18) and a second groove body (19); the first groove body (18) has a avoidance groove corresponding to the second hydraulic cylinder (16); the first groove body (18) and the second groove body (19) are combined to form an annular groove body.

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