Ball valve with wear-resistant valve rod connecting structure

Abstract

The utility model discloses a ball valve with a wear-resistant valve rod connecting structure, which comprises a ball valve body, a ball core, a valve rod, a connecting sleeve and a wear-resistant sleeve, the ball core is mounted in the ball valve body, sealing rings are mounted in the ball valve body on two sides of the ball core, a valve cover is mounted at the top end of the ball valve body, and the wear-resistant sleeve is mounted in the connecting sleeve. The valve rod is installed at the top of the ball valve body, the bottom end of the valve rod is fixedly connected with the ball core, padding is arranged on the outer side of the bottom of the valve rod, the connecting sleeve is fixed to the position, above the padding, of the top of the ball valve body, hemispherical rolling grooves are formed in the inner wall of the connecting sleeve at equal intervals, and balls are arranged in the hemispherical rolling grooves. And the wear-resistant sleeve is fixed on the outer wall of the valve rod on the inner side of the connecting sleeve. According to the utility model, the valve rod and the valve body are in rolling friction, so that the frictional resistance is reduced, the abrasion of the valve rod is greatly reduced, and the service life of the valve rod is prolonged.

Description

Technical Field

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

[0002] A ball valve is a valve in which a stem drives a ball to rotate about its axis. It is primarily used to open and close media, but can also be used for fluid regulation and control. The valve stem drives the ball to rotate about its axis to open and close the valve. This design offers advantages such as low fluid resistance, ease of operation, and a simple structure. It is suitable for a variety of media, including those containing fibers and fine solid particles. Ball valves can be categorized by actuation method, including manual, electric, pneumatic, and hydraulic types, and are widely used in the food, chemical, petroleum, and power industries.

[0003] The valve stem is an important valve component used for transmission. It is connected to the actuator or handle on the top and directly drives the valve core to move or rotate to achieve valve opening or closing or regulation. However, the valve stem of the ball valve is easily worn due to friction between solid particles and fillers in the medium, shortening the service life of the valve stem. Therefore, we propose a ball valve with a wear-resistant valve stem connection structure. Utility Model Content

[0004] The purpose of the present utility model is to provide a ball valve with a wear-resistant valve stem connection structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a ball valve with a wear-resistant valve stem connection structure, comprising a ball valve body, a ball core, a valve stem, a connecting sleeve and a wear-resistant sleeve, the ball core being installed inside the ball valve body, and sealing rings are installed inside the ball valve body on both sides of the ball core, a valve cover is installed at the top of the ball valve body, an oil storage box is installed on one side of the top of the valve cover, the valve stem is installed at the top of the ball valve body, the bottom end of the valve stem is fixedly connected to the ball core, a packing is provided on the outside of the bottom of the valve stem, the connecting sleeve is fixed to the top of the ball valve body above the packing, and the inner wall of the connecting sleeve is provided with equally spaced hemispherical rolling grooves, and balls are provided inside the hemispherical rolling grooves, the wear-resistant sleeve is fixed on the outer wall of the valve stem inside the connecting sleeve, and an annular guide groove is provided on the outer wall of the wear-resistant sleeve at the ball position.

[0006] Preferably, an inlet is provided at one end of the interior of the ball valve body, and an outlet is provided at the other end of the interior of the ball valve body.

[0007] Preferably, flanges are provided at both ends of the ball valve body, and mounting holes with equal spacing are provided at the edge positions inside the flanges.

[0008] Preferably, the top and bottom ends of the wear-resistant sleeve are tightly fitted with the inner walls of the top and bottom of the connecting sleeve.

[0009] Preferably, one side of the ball extends to the inside of the annular guide groove.

[0010] Preferably, an oil delivery channel is provided on the top of the connecting sleeve.

[0011] Preferably, an oil delivery pipe is installed at the bottom end of the oil storage box, and the bottom end of the oil delivery pipe is connected to the oil delivery channel.

[0012] Preferably, a refueling port is provided on one side of the top end of the oil storage box, and a sealing cover is threadedly connected to the top end of the refueling port.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] Since a connecting sleeve is fixed above the packing and a wear-resistant sleeve is fixed on the outer wall of the valve stem at the position of the connecting sleeve, the top and bottom ends of the wear-resistant sleeve are tightly fitted with the inner walls of the top and bottom of the connecting sleeve. When the valve stem is rotated, the balls in the hemispherical rolling grooves on the inner wall of the connecting sleeve roll along the annular guide grooves on the outer wall of the wear-resistant sleeve, so that the sliding friction between the valve stem and the connecting sleeve is converted into rolling friction, reducing frictional resistance, thereby reducing the wear of the valve stem. The sealing cover is removed and lubricating oil is added to the oil storage box through the refueling port. The lubricating oil enters the oil delivery channel through the oil pipe and slowly seeps into between the connecting sleeve and the wear-resistant sleeve. As the balls roll, the lubricating oil flows from top to bottom and lubricates the balls, thereby further reducing friction. By setting the connecting sleeve and the wear-resistant sleeve as the connecting structure between the valve stem and the ball valve body, the wear of the valve stem is greatly reduced, thereby extending the service life of the valve stem. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0016] Figure 2 For the utility model Figure 1 A in the middle is an enlarged structural diagram;

[0017] Figure 3 This is an enlarged structural diagram of the connecting sleeve of the utility model;

[0018] Figure 4 This is a schematic diagram of the enlarged top view of the connecting sleeve of the utility model;

[0019] Figure 5 It is a schematic diagram of the enlarged appearance of the wear-resistant sleeve of the utility model.

[0020] In the figure: 1. Ball valve body; 2. Ball core; 3. Sealing ring; 4. Flange; 5. Mounting hole; 6. Inlet; 7. Valve cover; 8. Oil storage box; 9. Oil filling port; 10. Sealing cover; 11. Oil pipe; 12. Valve stem; 13. Packing; 14. Outlet; 15. Connecting sleeve; 16. Hemispherical rolling groove; 17. Ball; 18. Oil delivery channel; 19. Wear-resistant sleeve; 20. Annular guide groove. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-5 The utility model provides an embodiment of a ball valve with a wear-resistant valve stem connection structure, comprising a ball valve body 1, a ball core 2, a valve stem 12, a connecting sleeve 15 and a wear-resistant sleeve 19. The ball core 2 is installed inside the ball valve body 1, and sealing rings 3 are installed inside the ball valve body 1 on both sides of the ball core 2. A valve cover 7 is installed at the top of the ball valve body 1, and an oil storage box 8 is installed on one side of the top of the valve cover 7.

[0024] The valve stem 12 is mounted on the top of the ball valve body 1. The bottom end of the valve stem 12 is fixedly connected to the ball core 2. A packing 13 is provided on the outside of the bottom of the valve stem 12. A connecting sleeve 15 is fixed to the top of the ball valve body 1 above the packing 13. The inner wall of the connecting sleeve 15 is provided with equally spaced hemispherical rolling grooves 16. Balls 17 are provided inside the hemispherical rolling grooves 16. A wear-resistant sleeve 19 is fixed to the outer wall of the valve stem 12 inside the connecting sleeve 15. An annular guide groove 20 is provided on the outer wall of the wear-resistant sleeve 19 at the position of the ball 17.

[0025] Specifically, the arrangement of the packing 13 can prevent the medium from leaking outward due to the movement of the valve stem 12, while reducing the friction resistance of the valve stem 12 during movement and reducing wear;

[0026] Furthermore, since a connecting sleeve 15 is fixed above the packing 13, a wear-resistant sleeve 19 is fixed to the outer wall of the valve stem 12 at the position of the connecting sleeve 15, and the top and bottom ends of the wear-resistant sleeve 19 are tightly fitted with the inner walls of the top and bottom of the connecting sleeve 15, when the valve stem 12 is rotated, the balls 17 in the hemispherical rolling grooves 16 on the inner wall of the connecting sleeve 15 roll along the annular guide grooves 20 on the outer wall of the wear-resistant sleeve 19, so that the sliding friction between the valve stem 12 and the connecting sleeve 15 is converted into rolling friction, thereby reducing frictional resistance and thus reducing the wear of the valve stem 12;

[0027] An inlet 6 is provided at one end of the interior of the ball valve body 1, and an outlet 14 is provided at the other end of the interior of the ball valve body 1;

[0028] Both ends of the ball valve body 1 are provided with flanges 4, and the inner edge of the flange 4 is provided with mounting holes 5 at equal intervals;

[0029] The top and bottom ends of the wear-resistant sleeve 19 are tightly fitted with the inner walls of the top and bottom of the connecting sleeve 15;

[0030] One side of the ball 17 extends to the inside of the annular guide groove 20;

[0031] An oil delivery channel 18 is provided on the top of the connecting sleeve 15;

[0032] The bottom end of the oil storage box 8 is provided with an oil delivery pipe 11, and the bottom end of the oil delivery pipe 11 is connected to the oil delivery channel 18;

[0033] A refueling port 9 is provided on one side of the top of the oil storage box 8, and a sealing cover 10 is threadedly connected to the top of the refueling port 9;

[0034] Specifically, the sealing cover 10 is removed, and lubricating oil is added to the oil storage box 8 through the refueling port 9. The lubricating oil enters the oil delivery channel 18 through the oil delivery pipe 11 and slowly seeps into between the connecting sleeve 15 and the wear-resistant sleeve 19. As the ball 17 rolls, the lubricating oil flows from top to bottom and lubricates the ball 17, thereby further reducing the friction. By setting the connecting sleeve 15 and the wear-resistant sleeve 19 as the connecting structure between the valve stem 12 and the ball valve body 1, the wear of the valve stem 12 is greatly reduced, thereby extending the service life of the valve stem 12.

[0035] When the embodiment of the present application is in use: First, the setting of the packing 13 can prevent the medium from leaking outward due to the movement of the valve stem 12, and at the same time reduce the friction resistance when the valve stem 12 moves, reducing wear. Furthermore, since a connecting sleeve 15 is fixed above the packing 13, a wear-resistant sleeve 19 is fixed on the outer wall of the valve stem 12 at the position of the connecting sleeve 15, and the top and bottom ends of the wear-resistant sleeve 19 are tightly fitted with the inner walls of the top and bottom of the connecting sleeve 15, when the valve stem 12 is rotated, the balls 17 in the hemispherical rolling groove 16 on the inner wall of the connecting sleeve 15 roll along the annular guide groove 20 on the outer wall of the wear-resistant sleeve 19, so that the valve stem 12 and the connecting sleeve 15 are in a stable state. The sliding friction is converted into rolling friction, reducing frictional resistance, thereby reducing the wear of the valve stem 12. Then, the sealing cover 10 is removed, and lubricating oil is added to the oil storage box 8 through the refueling port 9. The lubricating oil enters the oil delivery channel 18 through the oil delivery pipe 11 and slowly seeps into between the connecting sleeve 15 and the wear-resistant sleeve 19. As the ball 17 rolls, the lubricating oil flows from top to bottom and lubricates the ball 17, thereby further reducing the friction. By setting the connecting sleeve 15 and the wear-resistant sleeve 19 as the connecting structure between the valve stem 12 and the ball valve body 1, the wear of the valve stem 12 is greatly reduced, thereby extending the service life of the valve stem 12.

[0036] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A ball valve with a wear-resistant valve stem connection structure, characterized in that: The invention comprises a ball valve body (1), a ball core (2), a valve stem (12), a connecting sleeve (15) and a wear-resistant sleeve (19), wherein the ball core (2) is installed inside the ball valve body (1), and sealing rings (3) are installed inside the ball valve body (1) on both sides of the ball core (2), a valve cover (7) is installed at the top of the ball valve body (1), and an oil storage box (8) is installed on one side of the top of the valve cover (7), the valve stem (12) is installed at the top of the ball valve body (1), and the bottom end of the valve stem (12) is fixedly connected to the ball core (2). A packing (13) is provided on the outer side of the bottom of the valve stem (12), the connecting sleeve (15) is fixed to the top of the ball valve body (1) above the packing (13), and the inner wall of the connecting sleeve (15) is provided with hemispherical rolling grooves (16) at equal intervals, and balls (17) are provided inside the hemispherical rolling grooves (16), the wear-resistant sleeve (19) is fixed on the outer wall of the valve stem (12) inside the connecting sleeve (15), and an annular guide groove (20) is provided on the outer wall of the wear-resistant sleeve (19) at the position of the balls (17).

2. A ball valve with a wear-resistant valve stem connection structure according to claim 1, characterized in that: An inlet (6) is provided at one end of the interior of the ball valve body (1), and an outlet (14) is provided at the other end of the interior of the ball valve body (1).

3. The ball valve with a wear-resistant valve stem connection structure according to claim 1, characterized in that: Both ends of the ball valve body (1) are provided with flanges (4), and the inner edge positions of the flanges (4) are provided with mounting holes (5) at equal intervals.

4. The ball valve with a wear-resistant valve stem connection structure according to claim 1, characterized in that: The top and bottom ends of the wear-resistant sleeve (19) are tightly fitted to the inner walls of the top and bottom of the connecting sleeve (15).

5. The ball valve with a wear-resistant valve stem connection structure according to claim 1, characterized in that: One side of the ball (17) extends to the inside of the annular guide groove (20).

6. The ball valve with a wear-resistant valve stem connection structure according to claim 1, characterized in that: An oil delivery channel (18) is provided on the top of the connecting sleeve (15).

7. The ball valve with a wear-resistant valve stem connection structure according to claim 1, characterized in that: An oil delivery pipe (11) is installed at the bottom end of the oil storage box (8), and the bottom end of the oil delivery pipe (11) is connected to the oil delivery channel (18).

8. The ball valve with a wear-resistant valve stem connection structure according to claim 1, characterized in that: A refueling port (9) is provided on one side of the top end of the oil storage box (8), and a sealing cover (10) is threadedly connected to the top end of the refueling port (9).

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