Low-torque ball valve

Abstract

The utility model discloses a low-torque ball valve, and particularly relates to the technical field of ball valves, which comprises a valve body, a spherical valve core is movably arranged on the inner side of the valve body, and threaded ends are respectively arranged at two ends of the valve body; a valve rod protection device is arranged at the upper end of the inner side of the valve body and used for preventing the valve rod from being abraded, increasing sealing performance and avoiding overflow. The valve rod protection device comprises a valve rod, the valve rod is movably arranged on the inner side of the upper end of the valve body, the lower end of the valve rod is fixedly connected with the upper end of the ball valve, an H-shaped groove is formed in the outer surface of the lower end of the valve rod, and a rotating disc is fixedly arranged at the upper end of the valve rod; a ball valve anti-abrasion device for protecting the ball valve is arranged on the inner side of the valve body and used for preventing abrasion caused by friction between the outer surface of the spherical valve element and a port of the threaded end. By arranging the valve rod protection device, the valve rod can be prevented from being abraded, sealing is added, overflow is avoided, and by arranging the ball valve anti-abrasion device, abrasion caused by friction between the outer surface of the spherical valve element and a port of the threaded end head can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, and more specifically, to a low-torque ball valve. Background Art

[0002] The opening and closing part of the ball valve is a round sphere with a hole. The ball core rotates 0-90° around the valve stem axis to open or close the valve. Ball valves have many functions and are generally used in pipelines for switching or regulating media. Most ball valves are used in heating and air conditioning water systems and tap water pipeline transportation.

[0003] The existing low-torque ball valve will cause wear at the water outlet due to prolonged friction of the valve core, resulting in loose sealing and water leakage. In addition, the valve stem will cause overflow due to wear at the valve stem position due to long-term rotation. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a low-torque ball valve. The technical problem to be solved by the present invention is: it can reduce the friction between the valve core and the valve body, and seal and protect the valve stem from wear.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-torque ball valve, comprising a valve body:

[0006] A spherical valve core is movably arranged inside the valve body, and threaded ends are respectively provided at both ends of the valve body, through which two water pipe ends are threadedly connected to complete the connection between the utility model and the water pipe;

[0007] A valve stem protection device is provided at the upper end of the inner side of the valve body to prevent the valve stem from being worn and to increase the seal to avoid water overflow;

[0008] The valve stem protection device comprises a valve stem, which is movably arranged on the inner side of the upper end of the valve body, the lower end of the valve stem is fixedly connected to the upper end of the spherical valve core, an H-shaped groove is provided on the outer surface of the lower end of the valve stem, and a rotating disk is fixedly provided on the upper end of the valve stem, which can drive the valve ball to rotate when the valve stem rotates;

[0009] A ball valve anti-wear device for protecting the ball valve is arranged inside the valve body, which is used to prevent the outer surface of the spherical valve core from rubbing against the threaded end port and causing wear.

[0010] In a preferred embodiment, a connecting seat is fixedly provided in the inner groove of the upper end of the valve body, a rubber ring is fixedly provided on the inner wall of the connecting seat, the inner side of the H-shaped groove is movably connected to the outer surface of the rubber ring, the rubber ring is limited by the connecting seat, and when the valve stem rotates, the H-shaped groove and the rubber ring slide, thereby achieving a sealing sliding effect.

[0011] In a preferred embodiment, two O-shaped grooves are provided on the inner wall of the upper end of the valve body, and two O-shaped rubber pads are fixedly provided on the outer surface of the valve stem. The outer surfaces of the two O-shaped rubber pads are movably connected to the inner walls of the two O-shaped grooves respectively. When the valve stem rotates, the two O-shaped rubber pads can be driven to rotate in the O-shaped grooves. The smooth outer surface of the O-shaped rubber pads can reduce the torque of the valve stem and increase the sealing effect of the valve stem.

[0012] In a preferred embodiment, the ball valve anti-wear device comprises a ball valve cavity, the ball valve cavity is opened inside the valve body, the spherical valve core is located inside the ball valve cavity, and the spherical valve core can rotate in the ball valve cavity.

[0013] In a preferred embodiment, a rubber sleeve is fixedly provided on the inner wall of the ball valve cavity, and the inner wall of the rubber sleeve is movably connected to the outer surface of the spherical valve core. When the spherical valve core rotates, the rubber sleeve protects the spherical valve core, thereby preventing the spherical valve core from contacting the threaded end and causing friction between the spherical valve core and the threaded end.

[0014] In a preferred embodiment, a sealing gasket is fixedly provided at one end of the inner side of the threaded end, and the water pipe end and the threaded end can be isolated by the sealing gasket.

[0015] In a preferred embodiment, a slide groove is provided on the outer surface of the upper end of the valve body, a limit block is fixedly provided on the upper end of the slide groove, the outer surface of the slide groove is movably connected to a rotating disk, and a handle is fixedly provided on the upper end of the rotating disk.

[0016] Technical effects and advantages of the utility model:

[0017] 1. The utility model is provided with a valve stem protection device, which is beneficial to preventing valve stem wear and increasing sealing to avoid overflow. The H-shaped groove at the lower end of the valve stem is movably connected with the rubber ring. Since the rubber ring is limited and fixed by the connecting seat, when the valve stem rotates, the H-shaped groove and the rubber ring slide, thereby increasing the sealing effect through the rubber ring. The two O-shaped rubber pads on the outer surface of the valve stem are movably connected with the O-shaped groove on the inner wall of the upper end of the valve body. The smooth surface of the O-shaped rubber pad can achieve the effect of reducing torque and increasing sealing, thereby achieving the effect of valve stem protection and avoiding overflow.

[0018] 2. The utility model is provided with a ball valve anti-wear device, which is helpful to prevent the outer surface of the ball valve from being worn due to friction with the threaded end port. A rubber sleeve is fixedly provided on the inner wall of the ball valve cavity to protect the ball valve from rotation. When the ball valve rotates, sealing sliding can be achieved through the rubber sleeve. The threaded end is connected to the water pipe end, and a sealing gasket is provided between the threaded end and the water pipe end. Therefore, the sealing gasket can isolate the contact between the water pipe end and the ball valve cavity. When the ball valve rotates, the rubber sleeve and the sealing gasket cooperate to avoid wear caused by friction between the ball valve and the threaded end, thereby preventing the sealing effect from being affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a cross-sectional view of the utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the valve stem protection device of the utility model.

[0022] Figure 4 It is a schematic structural diagram of the ball valve anti-wear device of the utility model.

[0023] The accompanying drawings are marked as follows: 1. valve body; 2. valve stem protection device; 3. ball valve anti-wear device; 4. threaded end; 5. handle; 6. rotating disk; 7. limit block; 8. slide groove; 9. ball valve; 21. valve stem; 22. H-shaped groove; 23. rubber ring; 24. connecting seat; 25. O-shaped groove; 26. O-shaped rubber pad; 31. ball valve cavity; 32. rubber sleeve; 33. sealing pad. DETAILED DESCRIPTION

[0024] 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 them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field of ball valves without creative work are within the scope of protection of the utility model.

[0025] like Figure 1 and 2 As shown, the utility model provides a low torque ball valve, including a valve body 1:

[0026] A spherical valve core 9 is movably provided on the inner side of the valve body 1, and threaded ends 4 are respectively provided at both ends of the valve body 1; a slide groove 8 is provided on the outer surface of the upper end of the valve body 1, and a limit block 7 is fixedly provided on the upper end of the slide groove 8. The outer surface of the slide groove 8 is movably connected to the rotating disk 6, and a handle 5 is fixedly provided on the upper end of the rotating disk 6.

[0027] In order to prevent the valve stem 21 from being worn, a valve stem protection device 2 is provided at the inner upper end of the valve body 1 to prevent the valve stem 21 from being worn and to increase sealing to avoid water overflow;

[0028] like Figure 3 As shown, the valve stem protection device 2 includes a valve stem 21, which is movably arranged on the inner side of the upper end of the valve body 1, and the lower end of the valve stem 21 is fixedly connected to the upper end of the spherical valve core 9. An H-shaped groove 22 is provided on the outer surface of the lower end of the valve stem 21, and a rotating disk 6 is fixedly provided on the upper end of the valve stem 21. A connecting seat 24 is fixedly provided on the inner groove of the upper end of the valve body 1, and a rubber ring 23 is fixedly provided on the inner wall of the connecting seat 24. The inner side of the H-shaped groove 22 is movably connected to the outer surface of the rubber ring 23. Two O-shaped grooves 25 are provided on the inner wall of the upper end of the valve body 1, and two O-shaped rubber pads 26 are fixedly provided on the outer surface of the valve stem 21. The outer surfaces of the two O-shaped rubber pads 26 are The surfaces are movably connected with the inner walls of the two O-shaped grooves 25 respectively, and are movably connected with the rubber ring 23 through the H-shaped groove 22 at the lower end of the valve stem 21. Because the rubber ring 23 is limited and fixed by the connecting seat 24, when the valve stem 21 rotates, the H-shaped groove 22 and the rubber ring 23 slide, so as to increase the sealing effect through the rubber ring 23, and the two O-shaped rubber pads 26 on the outer surface of the valve stem 21 are movably connected with the O-shaped groove 25 on the inner wall of the upper end of the valve body 1. The smooth surface of the O-shaped rubber pad 26 can achieve the effect of reducing torque and increasing sealing, so as to achieve the effect of protecting the valve stem 21 and avoiding overflow.

[0029] Furthermore, in order to prevent the outer surface of the spherical valve core 9 from rubbing against the port 4 of the threaded end, a ball valve anti-wear device 3 for protecting the spherical valve core 9 is provided on the inner side of the valve body 1, so as to prevent the outer surface of the spherical valve core 9 from rubbing against the port 4 of the threaded end and causing wear;

[0030] like Figure 4 As shown, the ball valve anti-wear device 3 includes a ball valve cavity 31, the ball valve cavity 31 is opened on the inner side of the valve body 1, the ball valve core 9 is located on the inner side of the ball valve cavity 31, a rubber sleeve 32 is fixedly provided on the inner wall of the ball valve cavity 31, the inner wall of the rubber sleeve 32 is movably connected to the outer surface of the ball valve core 9, and a sealing gasket 33 is fixedly provided on one end of the inner side of the threaded end 4. The rubber sleeve 32 fixedly provided on the inner wall of the ball valve cavity 31 can protect the ball valve core 9 from rotation. When the ball valve core 9 rotates, the rubber sleeve 32 can realize sealing sliding. The threaded end 4 is connected to the water pipe end. A sealing gasket 33 is provided between the threaded end 4 and the water pipe end. Therefore, the sealing gasket 33 can isolate the water pipe end from contacting the ball valve cavity 31. When the ball valve core 9 rotates, the rubber sleeve 32 and the sealing gasket 33 cooperate to avoid wear caused by friction between the ball valve core 9 and the threaded end 4, thereby preventing the sealing effect from being affected.

[0031] The working principle is as follows: when the utility model is in use, the threaded ends 4 at both ends of the valve body 1 are connected to the water pipe ends. When the handle 5 is turned, the rotating disk 6, the valve stem 21 and the spherical valve core 9 are driven to rotate, thereby realizing water flow interruption. The valve stem protection device 2 provides anti-wear protection for the valve stem to prevent water overflow caused by valve stem wear, and the ball valve anti-wear device 3 protects the spherical valve core 9 to prevent the spherical valve core 9 from contacting the threaded end 4, thereby causing wear and causing poor sealing effect.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low torque ball valve, comprising a valve body (1), characterized in that: A spherical valve core (9) is movably provided inside the valve body (1), and threaded ends (4) are respectively provided at both ends of the valve body (1); The upper inner end of the valve body (1) is provided with a valve stem protection device (2) for preventing the valve stem (21) from being worn and increasing the sealing to avoid water overflow; The valve stem protection device (2) comprises a valve stem (21), the valve stem (21) is movably arranged on the inner side of the upper end of the valve body (1), the lower end of the valve stem (21) is fixedly connected to the upper end of the spherical valve core (9), an H-shaped groove (22) is formed on the outer surface of the lower end of the valve stem (21), and a rotating disk (6) is fixedly provided on the upper end of the valve stem (21); The valve body (1) is provided with a ball valve anti-wear device (3) for protecting the ball valve core (9) on the inner side thereof, and is used to prevent wear caused by friction between the outer surface of the ball valve core (9) and the port of the threaded end (4).

2. A low torque ball valve according to claim 1, characterized in that: A connecting seat (24) is fixedly provided in the inner groove of the upper end of the valve body (1), a rubber ring (23) is fixedly provided on the inner wall of the connecting seat (24), and the inner side of the H-shaped groove (22) is movably connected to the outer surface of the rubber ring (23).

3. A low torque ball valve according to claim 1, characterized in that: The inner wall of the upper end of the valve body (1) is provided with two O-shaped grooves (25), and the outer surface of the valve stem (21) is respectively fixed with two O-shaped rubber pads (26), and the outer surfaces of the two O-shaped rubber pads (26) are respectively movably connected to the inner walls of the two O-shaped grooves (25).

4. A low torque ball valve according to claim 1, characterized in that: The ball valve anti-wear device (3) comprises a ball valve cavity (31), the ball valve cavity (31) is opened on the inner side of the valve body (1), and the spherical valve core (9) is located on the inner side of the ball valve cavity (31).

5. A low torque ball valve according to claim 4, characterized in that: A rubber sleeve (32) is fixedly provided on the inner wall of the ball valve cavity (31), and the inner wall of the rubber sleeve (32) is movably connected to the outer surface of the ball valve core (9).

6. A low torque ball valve according to claim 1, characterized in that: A sealing gasket (33) is fixedly provided at one end of the inner side of the threaded end (4).

7. A low torque ball valve according to claim 1, characterized in that: The outer surface of the upper end of the valve body (1) is provided with a slide groove (8), the upper end of the slide groove (8) is fixedly provided with a limit block (7), the outer surface of the slide groove (8) is movably connected to the rotating disk (6), and the upper end of the rotating disk (6) is fixedly provided with a handle (5).

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