Clamp for valve seat machining

Abstract

The utility model relates to the technical field of clamps, in particular to a clamp for valve seat machining, which comprises a workbench, the bottom of the workbench is fixed at the top of a mounting seat through a fixing seat, the mounting seat is fixed on machining equipment, four through grooves are formed in the edge of the top of the workbench, and the four through grooves are arranged in a cross shape. And a connecting block is slidably connected to the interior of each through groove, the two ends of each connecting block extend out of the corresponding through groove, a clamping block is installed on the top of each connecting block, a connecting rod is rotationally connected to the bottom of each connecting block, and a containing cavity is formed in each fixing base. By rotating the worm, the rotating shaft can be driven to rotate under the action of the worm gear, then the synchronous belt can drive the rotating disc to rotate, the four connecting rods can be driven to synchronously move, the connecting rods drive the clamping blocks through the connecting blocks to clamp and fix the valve seat, the valve seat can be synchronously positioned in the clamping process, and the using effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a fixture for machining valve seats. Background Technology

[0002] The ball valve seat is the core sealing component of the ball valve. It works with the ball to form a sealing structure to control the flow of media and prevent leakage. The valve seat needs to be clamped and fixed by a fixture during machining.

[0003] Existing fixtures for valve seat machining typically use cylinders or lead screws to drive clamping blocks to hold the valve seat. However, during clamping, the clamping blocks can only hold the valve seat in place; they cannot simultaneously position it, requiring adjustment mechanisms for positioning. This results in poor performance, and the machining process generates debris that adheres to the cylinder or lead screw surface, leading to wear on the fixture's cylinder or lead screw and poor dust prevention. Therefore, we propose a new fixture for valve seat machining. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned shortcomings in the prior art by proposing a fixture for machining valve seats.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a fixture for machining valve seats is designed, including a worktable, the bottom of which is fixed to the top of a mounting base by a fixed base, and the mounting base is fixed to the machining equipment.

[0006] The top edge of the workbench has four through slots arranged in a cross shape. Each through slot has a connecting block slidably connected inside. Both ends of each connecting block extend to the outside of the through slot, and a clamping block is installed on the top of each connecting block.

[0007] Furthermore, each connecting block has a connecting rod rotatably connected to its bottom, and each fixed seat has an internal cavity with the connecting rod located inside the cavity.

[0008] A rotating shaft is rotatably connected to the top of the cavity, and a rotating disk is installed on the side of the rotating shaft. The other end of each connecting rod is rotatably connected to the top of the rotating disk. A worm wheel is also installed at the bottom of the rotating shaft. A worm is rotatably connected inside the cavity, and one side of the worm meshes with the worm wheel.

[0009] An air pump is installed inside the cavity. The air pump's inlet end is connected to an air inlet pipe. One end of the air inlet pipe is fixed to the side wall of the cavity and extends to the outside of the fixed base. The air pump's outlet end is connected to an air supply pipe. The other end of the air supply pipe is fixed to the side of the annular pipe. The annular pipe is fixed to the side wall of the cavity by a pipe support. Several pairs of exhaust pipes are installed on the inner surface of the annular pipe. Each pair of exhaust pipes is located on both sides of the corresponding through groove, and each pair of exhaust pipes has an exhaust hole on the adjacent surface.

[0010] Preferably, one end of the worm extends outside the fixed seat, and a handle is connected to the end of the worm.

[0011] Preferably, each through slot is equipped with a guide rod, and each guide rod slides through the corresponding connecting block.

[0012] Preferably, there is a gap between the exhaust pipe and the connecting block and the connecting rod.

[0013] Preferably, the vent is inclined upwards and the vent direction is towards the inside of the through groove.

[0014] Preferably, a dust cover is installed on the side of the mounting base, and the dust cover is fitted over the end of the air intake pipe.

[0015] Preferably, each connecting block has a cushioning rubber installed on its outer surface.

[0016] The design scheme proposed in this utility model has the following beneficial effects in application:

[0017] 1. By rotating the worm gear, the rotating shaft can be driven to rotate under the action of the worm wheel, which in turn drives the rotating disk to rotate synchronously, which in turn drives the four connecting rods to move synchronously. The connecting rods drive the clamping block through the connecting block to clamp and fix the valve seat. During the clamping process, the valve seat will be positioned synchronously, improving the use effect.

[0018] 2. An air pump can deliver external air through the intake pipe and the air delivery pipe into the annular pipe, and then discharge it into the through groove through the exhaust hole on the exhaust pipe. This blows away the debris generated during the valve seat processing, preventing the debris from falling into the receiving cavity and adhering to the surface of the worm gear, which would aggravate the wear of the worm gear and improve the dustproof effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the connection structure between the worm gear, rotating disk, and clamping block of this utility model.

[0022] Figure 4 This is a schematic diagram of the gas pump and annular pipe structure of this utility model;

[0023] Figure 5 This is a side sectional view of the structure of this utility model.

[0024] In the diagram: 1. Mounting base; 2. Fixing base; 3. Clamping block; 4. Through slot; 5. Worktable; 6. Rotary handle; 7. Worm gear; 8. Connecting block; 9. Inlet pipe; 10. Guide rod; 11. Connecting rod; 12. Rotating shaft; 13. Rotary disk; 14. Exhaust port; 15. Worm gear; 16. Annular pipe; 17. Exhaust pipe; 18. Air supply pipe; 19. Air supply pump; 20. Dust cover; 21. Receiving cavity. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figures 1-5 A fixture for machining valve seats includes a worktable 5, the bottom of which is fixed to the top of a mounting base 1 via a fixing base 2, and the mounting base 1 is fixed to the machining equipment, so that the worktable 5 can be installed together with the machining equipment.

[0027] like Figure 1 and Figure 3 As shown, the top edge of the workbench 5 has four through slots 4 arranged in a cross shape. Each through slot 4 has a connecting block 8 slidably connected inside it. Both ends of each connecting block 8 extend to the outside of the through slot 4. Each connecting block 8 has a clamping block 3 installed on its top. The operator places the valve seat between the clamping blocks 3, and the valve seat can be clamped and fixed by the clamping blocks 3.

[0028] It should be noted that, as Figure 3 and Figure 5 As shown, each through slot 4 is equipped with a guide rod 10, and each guide rod 10 slides through the corresponding connecting block 8. The guide rod 10 can limit the connecting block 8, so that the connecting block 8 remains stable.

[0029] like Figure 1 and Figure 3 As shown, each connecting block 8 has a connecting rod 11 rotatably connected to its bottom, and each fixed seat 2 has a receiving cavity 21 inside. The connecting rod 11 is located in the receiving cavity 21, and a rotating shaft 12 is rotatably connected to the top of the receiving cavity 21. A rotating disk 13 is installed on the side of the rotating shaft 12, and the other end of each connecting rod 11 is rotatably connected to the top of the rotating disk 13. In actual use, the connecting rod 11 can be moved by rotating the rotating disk 13, and the connecting rod 11 can drive the clamping block 3 to move synchronously relative to each other through the connecting block 8, thereby fixing the valve seat.

[0030] like Figure 3As shown, a worm gear 15 is also installed at the bottom of the rotating shaft 12, and a worm 7 is rotatably connected inside the receiving cavity 21. One side of the worm 7 meshes with the worm gear 15. In actual use, the operator can rotate the worm 7 to drive the rotating shaft 12 to rotate under the action of the worm gear 15, thereby controlling the rotation of the rotating disk 13. After the clamping block 3 clamps and fixes the valve seat, it can form a self-locking mechanism under the action of the worm gear 15 and the worm 7, which can prevent the clamping block 3 from loosening during the processing.

[0031] like Figure 2 and Figure 4 As shown, an air pump 19 is installed inside the receiving cavity 21. The air inlet end of the air pump 19 is connected to an air inlet pipe 9. One end of the air inlet pipe 9 is fixed to the side wall of the receiving cavity 21 and extends to the outside of the fixing seat 2. The air outlet end of the air pump 19 is connected to an air supply pipe 18. The other end of the air supply pipe 18 is fixed to the side of an annular pipe 16. The annular pipe 16 is fixed to the side wall of the receiving cavity 21 by a pipe bracket. Several pairs of exhaust pipes 17 are installed on the inner surface of the annular pipe 16. Each pair of exhaust pipes 17 is located in the corresponding through groove 4. On the side, each pair of exhaust pipes 17 has an exhaust hole 14 on the adjacent surface. The exhaust hole 14 is inclined upward and faces the inside of the through groove 4. In actual use, the air pump 19 can deliver external air to the air supply pipe 18 through the air inlet pipe 9, and then deliver it to the annular pipe 16 through the air supply pipe 18. Finally, the air flows into the exhaust pipe 17 and is blown out through the exhaust hole 14. After that, the air will be discharged through the through groove 4 to prevent the debris in the processing process from falling into the receiving cavity 21.

[0032] It should be noted that, as Figure 2 As shown, a dust cover 20 is installed on the side of the fixed base 2. The dust cover 20 is fitted onto the end of the air intake pipe 9. The dust cover 20 can filter the air drawn in by the air intake pipe 9, filter out impurities in the air, and prevent impurities from adhering to the worm gear 15 and worm 7 and aggravating the wear of the worm gear 15 and worm 7.

[0033] Specifically, in use, the operator installs the mounting base 1 at a preset position on the machining equipment, then places the valve seat between the clamping blocks 3. The operator then rotates the worm gear 7, which drives the worm wheel 15 to rotate. The worm wheel 15 drives the rotating shaft 12 to rotate, which in turn drives the rotating disk 13 to rotate synchronously. One end of the connecting rod 11 moves along with the rotation of the rotating disk 13, which in turn drives the clamping block 3 to move synchronously through the connecting block 8, clamping and fixing the valve seat. During clamping, the valve seat is simultaneously positioned, improving the performance. During machining, the operator can control the air pump 19 to operate. The air pump 19 filters external air through the dust cover 20 and then delivers it to the air supply pipe 18 through the cylinder inlet pipe 9. The air is then delivered to the annular pipe 16 and evenly distributed to the exhaust pipe 17. Finally, the air is blown into the through groove 4 through the exhaust hole 14 and discharged from the through groove 4. This blows away debris generated during valve seat machining, preventing debris from falling into the receiving cavity 21 and aggravating the wear of the worm wheel 15 and worm gear 7, thus improving the dustproof effect.

[0034] Furthermore, such as Figure 1 As shown, one end of the worm 7 extends outside the fixed base 2, and a handle 6 is connected to the end of the worm 7. The operator can rotate the worm 7 through the handle 6, which is convenient.

[0035] Furthermore, such as Figure 5 As shown, there is a gap between the exhaust pipe 17, the connecting block 8, and the connecting rod 11, so that the connecting block 8 and the connecting rod 11 will not collide with the exhaust pipe 17 when they move.

[0036] Furthermore, each connecting block 8 has a buffer rubber installed on its outer surface. The buffer rubber can buffer and protect the valve seat during the clamping process, preventing the clamping block 3 from scratching the valve seat surface during clamping.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A fixture for machining valve seats, comprising a worktable (5), characterized in that: The bottom of the workbench (5) is fixed to the top of the mounting base (1) by the fixing seat (2), and the mounting base (1) is fixed to the machining equipment; The top edge of the workbench (5) is provided with four through slots (4), which are arranged in a "+" shape. Each through slot (4) is slidably connected with a connecting block (8). Both ends of each connecting block (8) extend to the outside of the through slot (4), and a clamping block (3) is installed on the top of each connecting block (8). Furthermore, each connecting block (8) has a connecting rod (11) rotatably connected to its bottom, and each fixed seat (2) has a receiving cavity (21) inside, with the connecting rod (11) located inside the receiving cavity (21); The top of the cavity (21) is rotatably connected to a rotating shaft (12), and a rotating disk (13) is installed on the side of the rotating shaft (12). The other end of each connecting rod (11) is rotatably connected to the top of the rotating disk (13). A worm wheel (15) is also installed at the bottom of the rotating shaft (12). A worm (7) is rotatably connected inside the cavity (21), and one side of the worm (7) meshes with the worm wheel (15). An air pump (19) is provided inside the cavity (21). The air inlet end of the air pump (19) is connected to an air inlet pipe (9). One end of the air inlet pipe (9) is fixed on the side wall of the cavity (21) and extends to the outside of the fixed seat (2). The air outlet end of the air pump (19) is connected to an air supply pipe (18). The other end of the air supply pipe (18) is fixed on the side of the annular pipe (16). The annular pipe (16) is fixed on the side wall of the cavity (21) by a pipe support. Several pairs of exhaust pipes (17) are installed on the inner surface of the annular pipe (16). Each pair of exhaust pipes (17) is located on both sides of the corresponding through groove (4). Each pair of exhaust pipes (17) has an exhaust hole (14) on the adjacent surface.

2. The fixture for machining valve seats according to claim 1, characterized in that: One end of the worm (7) extends to the outside of the fixed seat (2), and a handle (6) is connected to the end of the worm (7).

3. The fixture for machining valve seats according to claim 1, characterized in that: Each through slot (4) is equipped with a guide rod (10), and each guide rod (10) slides through the corresponding connecting block (8).

4. The fixture for machining valve seats according to claim 1, characterized in that: There is a gap between the exhaust pipe (17), the connecting block (8), and the connecting rod (11).

5. The fixture for machining valve seats according to claim 4, characterized in that: The vent (14) is inclined upward and the vent (14) faces the inside of the through groove (4).

6. The fixture for machining valve seats according to claim 1, characterized in that: A dust cover (20) is installed on the side of the mounting base (2), and the dust cover (20) is fitted onto the end of the air intake pipe (9).

7. The fixture for machining valve seats according to claim 1, characterized in that: Each connecting block (8) has a cushioning rubber installed on its outer surface.

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