Grinding device for inner surface of valve casting

Abstract

The utility model discloses a valve casting inner surface grinding device which comprises a fixing frame and a mounting base, the fixing frame comprises an opening clamp and a sliding frame, a kidney-shaped hole is formed in the mounting base, a first fastener is arranged between the mounting base and the sliding frame and located in the kidney-shaped hole, a movable base and a driving piece are arranged on the mounting base in a sliding mode, and the driving piece is located in the kidney-shaped hole. The driving part can drive the movable seat to horizontally slide, a supporting frame is arranged on the movable seat, a grinding disc is rotationally arranged at one end of the supporting frame, a transmission shaft is arranged at the other end of the supporting frame, a transmission part is arranged between the transmission shaft and the grinding disc, and a first adjusting part used for adjusting the vertical lifting height of the supporting frame is arranged on the movable seat. According to the valve seat grinding device, the mounting base, the supporting frame and the grinding disc are arranged, the transmission piece is driven by an external power device to rotate, and therefore the wedge-shaped face of the inner wall of the valve seat is ground, the sealing performance of a valve is effectively improved, and the grinding efficiency and quality can be guaranteed.

Description

Technical Field

[0001] The utility model discloses a valve casting inner surface grinding device, belonging to the technical field of valve processing. Background Art

[0002] A gate valve is a gate plate that opens and closes. The movement direction of the gate plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened or fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate plate. Usually, the sealing surface is welded with metal materials to increase wear resistance, such as 1Cr13, STL6, stainless steel, etc. The gate plate has a rigid gate plate and an elastic gate plate. According to the different gate plates, the gate valve is divided into a rigid gate valve and an elastic gate valve.

[0003] The gate has two sealing surfaces, which form a wedge-shaped fit. The wedge angle varies with the valve parameters and is usually 5°, while the inner surface of the valve seat has the same fit slope as the gate. Since the valve seat is generally cast, it is difficult to process the inner surface of the valve seat due to its own structural limitations. In order to ensure its sealing with the gate, the valve seat is usually ground. However, the existing method for processing the inner surface of the valve seat is mostly manual grinding with a grinding rod. This method is difficult to ensure the flatness and processing accuracy of the valve seat fit. Utility Model Content

[0004] The utility model aims to solve the problems in the prior art and provides a valve casting inner surface grinding device.

[0005] The utility model achieves the above-mentioned purpose through the following technical scheme: a valve casting inner surface grinding device, including a fixed frame and a mounting seat, the fixed frame including an open clamp and a sliding frame, a waist-shaped hole is arranged on the mounting seat, and a first fastener is arranged between the mounting seat and the sliding frame, the first fastener is located in the waist-shaped hole, a movable seat and a driving member are slidably arranged on the mounting seat, the driving member can drive the movable seat to slide horizontally, a support frame is arranged on the movable seat, a grinding disc is rotatably arranged at one end of the support frame, and a transmission shaft is arranged at the other end, a transmission member is arranged between the transmission shaft and the grinding disc, and a first adjusting member for adjusting the vertical lifting height of the support frame is arranged on the movable seat.

[0006] Preferably, the transmission member includes a chain and two gears located inside the support frame, wherein one gear is fixedly connected to the transmission shaft, and the other gear is coaxially connected to the grinding disc, and the chain is driven by the two gears.

[0007] Preferably, the driving member includes a first screw rod and a hand wheel, one end of the first screw rod passes through the mounting seat and is fixedly connected to the hand wheel, and the other end of the first screw rod is threadedly connected to the movable seat.

[0008] Preferably, a second adjusting member is provided on the movable seat, a guide block is provided between the support frame and the movable seat, the guide block is slidably connected to the movable seat through a dovetail groove, the support frame is located between the first adjusting member and the guide block, one side of the guide block is an L-shaped structure, the second adjusting member includes an adjusting bolt and a spring, the adjusting bolt passes through the guide block and is connected to the movable seat, and both ends of the spring are respectively abutted between the movable seat and the guide block.

[0009] Preferably, the first adjusting member includes a pressing block and a second fastener, the support frame is located between the pressing block and the guide block, and the second fastener passes through the pressing block and is threadedly connected to the guide block.

[0010] Preferably, a third adjusting member for adjusting the swing angle of the support frame is provided on the movable seat, and the third adjusting member includes a knob, a limit rod and a swing frame, the middle portion of the limit rod is threadedly connected to the movable seat, and the swing frame is provided with a lug slidably connected to the limit rod, the knob is fixed to the end of the limit rod, and the guide block is installed on the guide block.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] By setting a mounting seat, a grinding disc and a supporting frame, the grinding disc is moved to a position relative to the inner surface of the valve seat to be processed under the drive of the first adjusting member, the second adjusting member and the third adjusting member, the grinding disc is driven to rotate by the transmission member, and gradually contacts the valve seat under the drive member, thereby grinding the wedge surface of the valve seat, which can effectively ensure the accuracy of the matching between the valve seat and the gate plate, and both the processing quality and efficiency can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a valve casting inner surface grinding device of the utility model Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the structure of a valve casting inner surface grinding device of the utility model Figure 2 ;

[0015] Figure numerals: 1. mounting seat; 2. grinding disc; 3. supporting frame; 4. third adjusting member; 5. pressing block; 6. second fastener; 7. second adjusting member; 8. transmission shaft; 9. fixing frame; 10. opening clamp; 11. movable seat; 12. driving member; 13. sliding frame; 14. first fastener; 15. hand wheel; 16. first screw; 17. knob; 18. limiting rod; 19. swing frame; 20. first adjusting member; 21. guide block; 22. adjusting bolt. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] like Figure 1-Figure 2 As shown, a valve casting inner surface grinding device includes a fixed frame 9 and a mounting seat 1, the fixed frame 9 includes an open clamp 10 and a sliding frame 13, a waist-shaped hole is provided on the mounting seat 1, and a first fastener 14 is provided between the mounting seat 1 and the sliding frame 13, the first fastener 14 is located in the waist-shaped hole, the mounting seat 1 can be stably fixed on the valve seat by using the open clamp 10 and the sliding frame 13, a movable seat 11 and a driving member 12 are slidably provided on the mounting seat 1, the driving member 12 includes a first screw rod 16 and a hand wheel 15, one end of the first screw rod 16 passes through the mounting seat 1 and is fixedly connected to the hand wheel 15, and the other end is threadedly connected to the movable seat 11, by rotating the hand wheel 15, the first screw rod 16 can drive the movable seat 11 to slide horizontally along the mounting seat 1,

[0018] A support frame 3 is arranged on the movable seat 11, a grinding disc 2 is rotatably arranged at one end of the support frame 3, a transmission shaft 8 is arranged at the other end, a transmission member is arranged between the transmission shaft 8 and the grinding disc 2, and the transmission member includes a chain and two gears located on the inner side of the support frame 3, one of the gears is fixedly connected to the transmission shaft 8, and the other gear is coaxially connected to the grinding disc 2. The chain is transmitted by the two gears, and the transmission shaft 8 can be driven to rotate by a handheld motor, and the grinding disc 2 can be driven to rotate by the chain and gears, so that the inner surface of the valve seat can be ground.

[0019] The movable seat 11 is provided with a first adjusting member 20 for adjusting the vertical lifting height of the support frame 3, the movable seat 11 is provided with a second adjusting member 7, a guide block 21 is provided between the support frame 3 and the movable seat 11, the guide block 21 is slidably connected to the movable seat 11 through a dovetail groove, the support frame 3 is located between the first adjusting member 20 and the guide block 21, one side of the guide block 21 is an L-shaped structure, the second adjusting member 7 includes an adjusting bolt 22 and a spring, the adjusting bolt 22 passes through the guide block 21 and is connected to the movable seat 11, and the two ends of the spring are respectively against the movable seat 11 and the guide block 21, the first adjusting member 20 includes a pressing block 5 and a second fastener 6, the support frame 3 is located between the pressing block 5 and the guide block 21, and the second fastener 6 passes through the pressing block 5 is threadedly connected with the guide block 21, and the third adjusting member 4 for adjusting the swing angle of the support frame 3 is arranged on the movable seat 11. The third adjusting member 4 includes a knob 17, a limit rod 18 and a swing frame 19. The middle part of the limit rod 18 is threadedly connected with the movable seat 11, and the swing frame 19 is provided with a lug slidably connected with the limit rod 18. The knob 17 is fixed to the end of the limit rod 18. The guide block 21 is installed on the guide block 21. The first adjusting member 20 can adjust the vertical height of the grinding disc 2, the second adjusting member 7 can adjust the left and right distance of the grinding disc 2 in the horizontal sliding direction of the movable seat 11, and the third adjusting member 4 can adjust the inclination angle of the grinding disc 2, so that the processing requirements of different types of gate valve seats of the grinding disc 2 can be met.

[0020] Working principle: When grinding the wedge-shaped surface of the gate valve seat, first use the open clamp 10 and the sliding frame 13 to fix the mounting seat 1 on the valve seat, then adjust the position of the mounting seat 1 through the first fastener 14, control the height of the grinding disc 2 on the inner side of the valve seat by rotating the second fastener 6 and the pressure block 5, and adjust the left and right position of the grinding disc 2 by using the adjusting bolt 22, so that it is kept at the same relative height with the wedge-shaped surface to be processed of the valve seat, and then rotate the knob 17, use the limit rod 18 to drive the swing frame 19 and the support frame 3 to rotate around the limit rod 18, so as to ensure that the inclination angle of the grinding disc 2 is consistent with the angle of the wedge surface, finally fix the external hand-held motor on the support frame 3, and fix it with the transmission shaft 8, drive the grinding disc 2 to rotate by the hand-held motor, and use the hand wheel 15 to rotate and drive the movable seat 11 to slide, so that the grinding disc 2 gradually approaches the wedge surface and grinds it, so that the grinding process of the valve seat can be completed, and its processing quality and efficiency can be effectively guaranteed.

[0021] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0022] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A valve casting inner surface grinding device, comprising a fixing frame (9) and a mounting seat (1), characterized in that: The fixed frame (9) comprises an open clamp (10) and a sliding frame (13); a waist-shaped hole is provided on the mounting seat (1), and a first fastener (14) is provided between the mounting seat (1) and the sliding frame (13); the first fastener (14) is located in the waist-shaped hole; a movable seat (11) and a driving member (12) are slidably provided on the mounting seat (1); the driving member (12) can drive the movable seat (11) to slide horizontally; a support frame (3) is provided on the movable seat (11); a grinding disc (2) is rotatably provided at one end of the support frame (3), and a transmission shaft (8) is provided at the other end; a transmission member is provided between the transmission shaft (8) and the grinding disc (2); and a first adjusting member (20) for adjusting the vertical lifting height of the support frame (3) is provided on the movable seat (11).

2. A valve casting inner surface grinding device according to claim 1, characterized in that: The transmission member comprises a chain and two gears located inside the support frame (3), one of the gears being fixedly connected to the transmission shaft (8), and the other gear being coaxially connected to the grinding disc (2), and the chain is driven by the two gears.

3. A valve casting inner surface grinding device according to claim 1, characterized in that: The driving member (12) comprises a first screw rod (16) and a hand wheel (15); one end of the first screw rod (16) passes through the mounting seat (1) and is fixedly connected to the hand wheel (15), and the other end of the first screw rod (16) is threadedly connected to the movable seat (11).

4. A valve casting inner surface grinding device according to claim 1, characterized in that: The movable seat (11) is provided with a second adjusting member (7), a guide block (21) is provided between the support frame (3) and the movable seat (11), the guide block (21) is slidably connected to the movable seat (11) via a dovetail groove, the support frame (3) is located between the first adjusting member (20) and the guide block (21), one side of the guide block (21) is in an L-shaped structure, the second adjusting member (7) comprises an adjusting bolt (22) and a spring, the adjusting bolt (22) passes through the guide block (21) and is connected to the movable seat (11), and two ends of the spring are respectively abutted between the movable seat (11) and the guide block (21).

5. A valve casting inner surface grinding device according to claim 4, characterized in that: The first adjusting member (20) comprises a pressing block (5) and a second fastening member (6); the support frame (3) is located between the pressing block (5) and the guide block (21); and the second fastening member (6) passes through the pressing block (5) and is threadedly connected to the guide block (21).

6. A valve casting inner surface grinding device according to claim 5, characterized in that: The movable seat (11) is provided with a third adjusting member (4) for adjusting the swing angle of the support frame (3); the third adjusting member (4) comprises a knob (17), a limit rod (18) and a swing frame (19); the middle portion of the limit rod (18) is threadedly connected to the movable seat (11); the swing frame (19) is provided with a lug slidably connected to the limit rod (18); the knob (17) is fixed to the end of the limit rod (18); and the guide block (21) is mounted on the guide block (21).

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