Wear-resistant ball valve

Abstract

The utility model discloses a wear-resistant ball valve which comprises a valve body, a valve cover and a limiting mechanism, the valve body is communicated with the valve cover, the valve body is connected with the valve cover in a matched mode and fixedly connected with the valve cover through bolts and nuts, and the end, facing the valve body, of the valve cover and the end, away from the valve cover, of the valve body are fixedly connected with valve seats. A valve ball is movably connected between the valve seats in a sleeved mode, and a positioning seat is fixedly connected to the inner wall, located under the center of the bottom face of the valve ball, of the valve body. The ball valve has the advantages that the valve body is divided into the valve cover and the valve body which are matched with each other, parts such as the valve ball in the valve body can be disassembled and assembled conveniently, maintenance is facilitated, the positioning device is arranged at the bottom end of the valve ball, namely, the positioning shaft rotates in the groove in the positioning seat, the valve ball does not deviate when working for a long time, stability is improved, and the service life of the valve body is prolonged. The limiting mechanism is arranged at the position of the valve rod on the top face of the valve body, so that over-opening or over-closing caused when the valve body is opened or closed can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a wear-resistant ball valve. Background Art

[0002] A ball valve is a flow control device that uses a hollow, porous, swingable ball to control the flow of fluid through it. It is mainly used to cut off, distribute, and change the flow direction of the medium. The opening and closing parts of the ball valve are a sphere, which can be opened and closed by rotating 90 degrees. It is easy to operate and has good sealing. The ball valve evolved from the plug valve and is widely used in many industries such as petroleum, chemical industry, and electric power due to its durability and reliability.

[0003] The existing patent for "a wear-resistant ball valve" with publication number "CN219734279U" includes an L-shaped mounting plate, a valve body, a water outlet and a water inlet. The valve body has valve seats installed at both ends by screws and a rubber sealing ring is bonded to the inside of the valve seat. The top of the ball is installed with a valve stem through a mounting sleeve. The top of the valve body is installed with a shaft sleeve through a mounting hole and the valve stem passes through the shaft sleeve. The top of the valve stem is installed with a handwheel that is convenient for driving the valve stem to rotate by screws. The device can improve the wear resistance of the ball, is not easy to generate mechanical noise, and is suitable for widespread promotion and use.

[0004] However, the above ball valve still has some shortcomings in actual use: the valve body in the middle of the ball valve is an integrated structure, which is inconvenient to disassemble and install its interior; the valve is easily over-opened or over-closed when switching the valve by the hand wheel, and the switching state of the ball valve cannot be quickly determined. Utility Model Content

[0005] The utility model aims to solve the problems in the prior art that the internal parts of the valve body are difficult to disassemble and install and the opening and closing of the valve cannot be accurately controlled, and proposes a wear-resistant ball valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A wear-resistant ball valve comprises a valve body, a valve cover and a limit mechanism, wherein the valve body and the valve cover are communicated, the valve body and the valve cover are matched and connected and fixedly connected by bolts and nuts, the end of the valve cover facing the valve body and the end of the valve body away from the valve cover are both fixedly connected with valve seats, a valve ball is movably sleeved between the valve seats, a positioning seat is fixedly connected to the inner wall of the valve body located just below the center of the bottom surface of the valve ball, a groove is provided at the center of the top surface of the positioning seat, a positioning shaft is fixedly connected to the center of the bottom surface of the valve ball, and the positioning shaft The bottom end is rotatably connected to the groove, the top end of the valve ball is fixedly connected to a valve stem, the upper part of the valve stem passes through the valve body and is rotatably connected to the valve body, the top end of the valve stem is fixedly connected to a handle, the limiting mechanism comprises a limiting block fixedly connected to the top surface of the valve body and a limiting rod fixedly connected to the valve stem, the limiting block passes through and is rotatably connected to the valve stem, a limiting groove is provided on the upper surface of the limiting block, the limiting rod moves in the limiting groove, the outer end of the valve cover is connected to a water inlet, and the outer end of the valve body is connected to a water outlet.

[0008] In order to better achieve the above purpose, the utility model adopts a further technical solution: the outer ends of the water inlet and the water outlet are fixedly connected with docking flanges, and the docking flanges are provided with bolt holes for docking with water pipes.

[0009] In order to better achieve the above-mentioned purpose, the utility model adopts a further technical solution: the middle part of the valve body is rectangular and the two ends are cylindrical, and mounting plates are fixedly connected on both sides of the bottom surface of the valve body. The mounting plates are L-shaped plates, and mounting bolts are movably connected through the bottom plate of the mounting plate.

[0010] In order to better achieve the above purpose, the utility model adopts a further technical solution: the valve ball is provided with a through hole in the horizontal direction, a rubber sealing ring is fixedly bonded to the inner side of the valve seat, and the rubber sealing ring is in close contact with the surface of the valve ball.

[0011] In order to better achieve the above purpose, the utility model adopts a further technical solution: the limit block is circular, the limit groove is a 90° sector, there are two limit grooves and they are symmetrical about the valve stem, and the two ends of the limit rod are respectively in the two limit grooves.

[0012] The advantages of the utility model are: by disassembling the valve body into two parts, the valve cover and the valve body, it is convenient for disassembling and assembling parts such as the valve ball in the valve body, and it is also convenient for maintenance; by arranging a positioning device at the bottom end of the valve ball, that is, the positioning shaft rotates in the groove on the positioning seat, the valve ball does not deviate during long-term operation, thereby improving stability; by arranging a limit mechanism at the valve stem on the top surface of the valve body, over-opening or over-closing caused by opening and closing the valve body can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1This is a schematic diagram of the structure of a wear-resistant ball valve proposed by the utility model;

[0014] Figure 2 This is a schematic cross-sectional structure diagram of a wear-resistant ball valve proposed by the utility model;

[0015] Figure 3 The utility model is a schematic structural diagram of a limit mechanism of a wear-resistant ball valve.

[0016] In the figure: 1 valve body, 2 valve cover, 3 valve seat, 4 valve ball, 5 positioning seat, 6 positioning shaft, 7 valve stem, 8 handle, 9 limit block, 10 limit groove, 11 limit rod, 12 water inlet, 13 water outlet, 14 docking flange, 15 mounting plate, 16 mounting bolts. DETAILED DESCRIPTION

[0017] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Reference Figure 1-Figure 3 As shown, a wear-resistant ball valve comprises a valve body 1, a valve cover 2 and a limit mechanism. The valve body 1 and the valve cover 2 are connected, and the valve body 1 and the valve cover 2 are matched and connected and fixedly connected by bolts and nuts. The mutual cooperation between the valve cover 2 and the valve body 1 is conducive to the disassembly and assembly of the internal parts of the valve body 1, and is also conducive to maintenance. The end of the valve cover 2 facing the valve body 1 and the end of the valve body 1 away from the valve cover 2 are fixedly connected with a valve seat 3, and a valve ball 4 is movably sleeved between the valve seats 3. The valve ball 4 is provided with a through hole in the horizontal direction. A rubber sealing ring is fixedly bonded to the inner side of the valve seat 3. The rubber sealing ring is in close contact with the surface of the valve ball 4 to improve the sealing between the valve seat 3 and the valve ball 4 and prevent water leakage. A positioning seat 5 is fixedly connected to the inner wall of the valve body 1 just below the center of the bottom surface of the valve ball 4, and a groove is provided at the center of the top surface of the positioning seat 5. A positioning shaft 6 is fixedly connected to the center of the bottom surface of the valve ball 4, and the bottom end of the positioning shaft 6 rotates with the groove The valve ball 4 is connected to the valve body 1, and the upper part of the valve stem 7 passes through the valve body 1 and is rotatably connected to the valve body 1. The top of the valve stem 7 is fixedly connected to the handle 8. The limiting mechanism includes a limiting block 9 fixedly connected to the top surface of the valve body 1 and a limiting rod 11 fixedly connected to the valve stem 7. The limiting block 9 passes through and is rotatably connected to the valve stem 7. A limiting groove 10 is provided on the upper surface of the limiting block 9. The limiting rod 11 moves in the limiting groove 10. The limiting block 9 is circular, and the limiting groove 10 is a 90° sector-shaped. There are two limiting grooves 10 and they are symmetrical about the valve stem 7. The two ends of the limiting rod 11 are respectively in the two limiting grooves 10, so that the valve stem 7 can only rotate within the sector-shaped range of the limiting groove 10, and the maximum rotation range of the valve ball 4 in one direction is limited to 90°, thereby avoiding over-opening or over-closing when opening or closing the valve body.

[0019] The middle part of the valve body 1 is rectangular and the two ends are cylindrical. The outer end of the valve cover 2 is connected to the water inlet 12, and the outer end of the valve body 1 is connected to the water outlet 13. The outer ends of the water inlet 12 and the water outlet 13 are fixedly connected to the docking flange 14, and the docking flange 14 is provided with bolt holes for docking with the water pipe. The bottom surface of the valve body 1 is fixedly connected with mounting plates 15 on both sides. The mounting plate 15 is an L-shaped plate. The bottom plate of the mounting plate 15 is movably connected with mounting bolts 16 for fixing the valve body 1.

[0020] When in use, the ball valve is fixed by the mounting bolts 16 on the mounting plate 15, the water pipes are connected to the water inlet 12 and the water outlet 13 respectively, water is passed through the water pipe on the side of the water inlet 12, the handle 8 is turned, and the valve ball 4 is driven to rotate through the valve stem 7 to open or close the valve body 1 to achieve water circulation or blocking; the ball valve body is divided into two parts, the valve cover 2 and the valve body 1. The mutual cooperation of these two parts is conducive to the disassembly and assembly of the valve ball 4 and other parts in the valve body 1 for maintenance. By arranging a positioning device at the bottom of the valve ball 4, the positioning shaft 6 fixedly connected to the bottom end of the valve ball 4 is confined in the groove on the positioning seat 5, so as to achieve the valve ball 4 In addition to its own rotation, the positioning of the valve ball 4 allows the valve ball 4 to work for a long time without deviation, thereby improving stability. By arranging a limit mechanism at the valve stem 7 on the top surface of the valve body 1, the valve stem 7 can only rotate within the fan-shaped range of the limit groove 10, limiting the maximum rotation range of the valve ball 4 in one direction to 90°, thereby avoiding over-opening or over-closing when opening or closing the valve body. The ball valve is set to be in the maximum open state when its handle 8 is parallel to the water flow direction, and in the fully closed state when the two are perpendicular, or the words "open" and "close" are directly engraved at the corresponding position on the limit block 9, so that the current state of the ball valve can be quickly and accurately determined.

Claims

1. A wear-resistant ball valve, comprising a valve body (1), a valve cover (2) and a limit mechanism, characterized in that: The valve body (1) and the valve cover (2) are connected, the valve body (1) and the valve cover (2) are matched and connected and fixedly connected by bolts and nuts, one end of the valve cover (2) facing the valve body (1) and one end of the valve body (1) away from the valve cover (2) are fixedly connected to valve seats (3), a valve ball (4) is movably sleeved between the valve seats (3), a positioning seat (5) is fixedly connected to the inner wall of the valve body (1) located directly below the center of the bottom surface of the valve ball (4), a groove is provided at the center of the top surface of the positioning seat (5), a positioning shaft (6) is fixedly connected to the center of the bottom surface of the valve ball (4), the bottom end of the positioning shaft (6) is rotatably connected to the groove, and the valve ball (4) The top of the valve cover (2) is fixedly connected to a valve stem (7), the upper part of the valve stem (7) passes through the valve body (1) and is rotatably connected to the valve body (1), and the top of the valve stem (7) is fixedly connected to a handle (8); the limiting mechanism comprises a limiting block (9) fixedly connected to the top surface of the valve body (1) and a limiting rod (11) fixedly connected to the valve stem (7), the limiting block (9) passes through the valve stem (7) and is rotatably connected, a limiting groove (10) is provided on the upper surface of the limiting block (9), and the limiting rod (11) moves in the limiting groove (10), the outer end of the valve cover (2) is connected to a water inlet (12), and the outer end of the valve body (1) is connected to a water outlet (13).

2. A wear-resistant ball valve according to claim 1, characterized in that: The outer ends of the water inlet (12) and the water outlet (13) are fixedly connected to a docking flange (14), and the docking flange (14) is provided with bolt holes for docking with a water pipe.

3. A wear-resistant ball valve according to claim 1, characterized in that: The middle part of the valve body (1) is rectangular and the two ends are cylindrical. The bottom surface of the valve body (1) is fixedly connected to mounting plates (15) on both sides. The mounting plate (15) is an L-shaped plate. The bottom plate of the mounting plate (15) is movably connected to mounting bolts (16).

4. A wear-resistant ball valve according to claim 1, characterized in that: The valve ball (4) is provided with a through hole in the horizontal direction, and a rubber sealing ring is fixedly bonded to the inner side of the valve seat (3), and the rubber sealing ring is in close contact with the surface of the valve ball (4).

5. The wear-resistant ball valve according to claim 1, characterized in that: The limiting block (9) is circular, the limiting groove (10) is 90° sector-shaped, there are two limiting grooves (10) which are symmetrical about the valve stem (7), and both ends of the limiting rod (11) are respectively in the two limiting grooves (10).

Images