Built-in opening and closing positioning ball valve

Abstract

The utility model belongs to the technical field of ball valve structure improvement, and particularly relates to a built-in opening and closing positioning ball valve which comprises a valve body, two sealing seats are installed on the inner side of the valve body, a ball-shaped valve core is connected between the two sealing seats, a valve cover is arranged on the valve body, a valve rod is rotatably connected in the valve cover, one end of the valve rod is connected with the ball-shaped valve core, and the other end of the valve rod is connected with a handle. A positioning hole is formed in the valve rod in the radial direction in a penetrating mode, a spring and two positioning balls are installed in the positioning hole, the two positioning balls are located at the two ends of the spring respectively, and four positioning grooves correspondingly matched with the positioning balls are formed in the inner side wall of the valve cover and distributed at equal intervals. According to the ball valve, the positioning ball and the positioning groove are matched to position the position of the ball valve element, the positioning precision is high, meanwhile, the positioning ball is a ball body and is not prone to abrasion and deformation, the positioning ball and the positioning groove are both arranged in the ball valve and are not prone to deformation due to the influence of external force, and therefore opening and closing positioning of the ball valve element can be guaranteed for a long time.

Description

Technical Field

[0001] The utility model relates to a built-in opening and closing positioning ball valve, belonging to the technical field of ball valve structure improvement. Background Art

[0002] The ball valve is a common valve structure that mainly plays the role of cutting off and distributing the medium in the pipeline that conveys the medium. Because of its advantages such as small fluid resistance, easy and quick opening and closing, and good sealing performance, it is widely used in the fields of petroleum, chemical industry, power generation, papermaking, atomic energy, aviation, rockets, municipal administration, etc.

[0003] The main structure of the ball valve is a spherical valve core that is rotated inside the valve body and passes through the center hole. The spherical valve core is connected to a valve stem that passes through the valve body, and is equipped with a handle on the valve stem that can drive the spherical valve core to rotate. When the spherical valve core is rotated 90°, the inlet and outlet are all spherical, thereby cutting off the flow. When the spherical valve core is rotated back, the center hole on the spherical valve core is parallel to the axis of the inlet and outlet of the valve body, allowing the medium to flow.

[0004] In the prior art, the handle is typically positioned on the outside of the ball valve using a limit rod in conjunction with a limit pin or a limit groove. For example, Chinese Utility Model Patent No. CN208951404U discloses a ball valve positioning structure that limits the handle by cooperating between a supporting portion (equivalent to the limit rod) and a stop rod (equivalent to the limit pin). This handle-limiting structure can easily deform due to wear or accidental pressure after prolonged use, resulting in incomplete opening or closing of the ball valve due to mismatching, affecting the ball valve's opening and closing positioning accuracy. Utility Model Content

[0005] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a built-in opening and closing positioning ball valve with high opening and closing positioning accuracy.

[0006] The built-in opening and closing positioning ball valve described in the utility model includes a valve body, two sealing seats are installed on the inner side of the valve body, a spherical valve core is connected between the two sealing seats, a valve cover is provided on the valve body, a valve stem is rotatably connected inside the valve cover, one end of the valve stem is connected to the spherical valve core, and the other end is connected to a handle, a positioning hole is radially penetrated in the valve stem, a spring and two positioning balls are installed in the positioning hole, the two positioning balls are respectively located at both ends of the spring, and four positioning grooves corresponding to the positioning balls are provided on the inner side wall of the valve cover, and the four positioning grooves are equally spaced.

[0007] Furthermore, graphite filler is filled between the valve cover and the valve stem.

[0008] Furthermore, a mounting hole is provided on the top of the valve body, and the valve cover is removably and sealedly installed corresponding to the mounting hole. Retaining seats are installed on the left and right sides of the inside of the mounting hole. The two sealing seats are installed on the side walls on the opposite side of the two retaining seats, and the first sealing gaskets are installed on the side walls on the opposite side of the two retaining seats.

[0009] Furthermore, the valve cover and the valve body are fixedly connected by a plurality of bolts, and a second sealing gasket is installed between the valve cover and the valve body.

[0010] Furthermore, a disc spring is installed between the sealing seat and the retaining seat.

[0011] Furthermore, the top of the retaining seat rests on the valve cover.

[0012] Furthermore, a driving plate is rotatably connected to the valve stem, and the side walls on the opposite sides of the two retaining seats are provided with a slot corresponding to the driving plate.

[0013] Working principle and process:

[0014] When the center hole in the ball valve core is in a fully open state, the two positioning balls are just in two opposite positioning grooves. When the ball valve core needs to be closed, the handle is turned, and the handle drives the valve stem to rotate, which drives the ball valve core to rotate. At the same time, the valve stem also drives the two positioning balls to compress the springs and disengage from the two positioning grooves. When the ball valve core rotates 90°, the center hole is in a fully closed state. At this time, the two positioning balls are just stuck in the other two positioning grooves, thereby ensuring the positioning accuracy of the ball valve core when it is fully opened and closed.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The built-in opening and closing positioning ball valve described in the utility model positions the position of the spherical valve core through the cooperation of the positioning ball and the positioning groove, and has high positioning accuracy. At the same time, the positioning ball is a sphere and is not easy to wear and deform. Moreover, the positioning ball and the positioning groove are both arranged inside the ball valve and are not easily deformed by external forces. Therefore, the opening and closing positioning of the spherical valve core can be guaranteed for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the utility model;

[0018] Figure 2 This is a schematic diagram of the cooperation between the positioning ball and the positioning groove of the utility model;

[0019] Figure 3 yes Figure 1 Enlarged view of point M in the middle.

[0020] In the figure: 1. Valve body; 2. First sealing gasket; 3. Sealing seat; 4. Ball valve core; 5. Center hole; 6. Slot; 7. Second sealing gasket; 8. Bolt; 9. Retaining seat; 10. Valve cover; 11. Positioning ball; 12. Spring; 13. Graphite packing; 14. Handle; 15. Drive plate; 16. Valve stem; 17. Positioning hole; 18. Positioning groove; 19. Disc spring. DETAILED DESCRIPTION

[0021] The following is a further description of the embodiments of the present invention with reference to the accompanying drawings:

[0022] Example 1:

[0023] like Figures 1 to 3 As shown, the built-in opening and closing positioning ball valve described in the utility model includes a valve body 1, two sealing seats 3 are installed on the inner side of the valve body 1, a spherical valve core 4 is connected between the two sealing seats 3, a valve cover 10 is provided on the valve body 1, a valve stem 16 is rotatably connected inside the valve cover 10, one end of the valve stem 16 is connected to the spherical valve core 4, and the other end is connected to the handle 14, a positioning hole 17 is radially penetrated in the valve stem 16, a spring 12 and two positioning balls 11 are installed in the positioning hole 17, the two positioning balls 11 are respectively located at both ends of the spring 12, and four positioning grooves 18 corresponding to the positioning balls 11 are provided on the inner wall of the valve cover 10, and the four positioning grooves 18 are equally spaced.

[0024] When in use, when the center hole 5 in the ball valve core 4 is coaxial with the inlet and outlet of the valve body 1, the ball valve core 4 is in a fully open state. At this time, the two positioning balls 11 are just in two opposite positioning grooves 18. When the ball valve core 4 needs to be closed, the handle 14 is turned, and the handle 14 drives the valve stem 16 to rotate, which can drive the ball valve core 4 to rotate. At the same time, the valve stem 16 will also drive the two positioning balls 11 to compress the spring 12 and disengage from the two positioning grooves 18. When the ball valve core 4 rotates 90°, the center hole 5 is in a fully closed state. At this time, the two positioning balls 11 are just stuck in the other two positioning grooves 18, thereby ensuring the positioning accuracy of the ball valve core 4 when it is fully opened and closed.

[0025] Example 2:

[0026] like Figures 1 to 3 As shown, based on Example 1,

[0027] Furthermore, a graphite filler 13 is filled between the valve cover 10 and the valve stem 16. The graphite filler 13 can ensure a long-term seal of the valve stem 16 and prevent the medium from leaking.

[0028] Furthermore, a mounting hole is provided on the top of the valve body 1, and the valve cover 10 is detachably and sealably mounted corresponding to the mounting hole. Retaining seats 9 are mounted on both left and right sides of the interior of the mounting hole. The two sealing seats 3 are mounted on the side walls on the opposite side of the two retaining seats 9. A first sealing gasket 2 is mounted on the side walls on the opposite side of the two retaining seats 9. The first sealing gasket 2 can ensure the sealing between the retaining seat 9 and the valve body 1. By removing the valve cover 10, the retaining seat 9 together with the sealing seat 3 and the spherical valve core 4 can be taken out for maintenance or replacement without disassembling the connection between the valve body 1 and the medium pipeline, making the maintenance or replacement of parts in the valve body 1 more convenient.

[0029] Furthermore, the valve cover 10 is fixedly connected to the valve body 1 by a plurality of bolts 8. A second sealing gasket 7 is installed between the valve cover 10 and the valve body 1. The second sealing gasket 7 is used to seal between the valve cover 10 and the valve body 1. The valve cover 10 can be disassembled by removing the bolts 8, which is easy to operate.

[0030] Furthermore, a disc spring 19 is installed between the sealing seat 3 and the retaining seat 9. The disc spring 19 can ensure the sealing performance of the sealing seat 3 on the one hand, and compensate for the wear of the sealing surface of the sealing seat 3 on the other hand, thereby increasing the service life of the sealing seat 3;

[0031] Furthermore, the top of the retaining seat 9 rests against the valve cover 10, which can ensure the accuracy of the installation position of the retaining seat 9 when the valve cover 10 is tightened;

[0032] Furthermore, the valve stem 16 is rotatably connected to a drive plate 15, and the side walls on the opposite side of the two retaining seats 9 are provided with a slot 6 corresponding to the drive plate 15. By screwing the two ends of the drive plate 15 into the two slots 6, the two retaining seats 9 can be ensured to move downward synchronously during installation, making the installation more labor-saving; during maintenance, by pulling up the drive plate 15, the two retaining seats 9 can be easily removed, which is conducive to improving the efficiency of maintenance work.

Claims

1. A built-in open / close position ball valve, comprising a valve body (1), two sealing seats (3) installed on the inner side of the valve body (1), a spherical valve core (4) connected between the two sealing seats (3), a valve cover (10) provided on the valve body (1), a valve stem (16) rotatably connected to the valve cover (10), one end of the valve stem (16) connected to the spherical valve core (4), and the other end connected to a handle (14), characterized in that: A positioning hole (17) is radially passed through the valve stem (16), a spring (12) and two positioning balls (11) are installed in the positioning hole (17), and the two positioning balls (11) are respectively located at the two ends of the spring (12). Four positioning grooves (18) corresponding to the positioning balls (11) are provided on the inner wall of the valve cover (10), and the four positioning grooves (18) are distributed at equal intervals.

2. The built-in opening and closing positioning ball valve according to claim 1 is characterized in that: A graphite filler (13) is filled between the valve cover (10) and the valve stem (16).

3. The built-in opening and closing positioning ball valve according to claim 1 or 2, characterized in that: A mounting hole is provided on the top of the valve body (1), and the valve cover (10) is detachably and sealably mounted corresponding to the mounting hole. Retaining seats (9) are mounted on both left and right sides of the interior of the mounting hole. The two sealing seats (3) are mounted on the side walls on the opposite side of the two retaining seats (9), and a first sealing gasket (2) is mounted on the side walls on the opposite side of the two retaining seats (9).

4. The built-in opening and closing positioning ball valve according to claim 3 is characterized in that: The valve cover (10) and the valve body (1) are fixedly connected via a plurality of bolts (8), and a second sealing gasket (7) is installed between the valve cover (10) and the valve body (1).

5. The built-in opening and closing positioning ball valve according to claim 3 is characterized in that: A disc spring (19) is installed between the sealing seat (3) and the retaining seat (9).

6. The built-in opening and closing positioning ball valve according to claim 3 is characterized in that: The top of the retaining seat (9) abuts against the valve cover (10).

7. The built-in opening and closing positioning ball valve according to claim 3 is characterized in that: The valve stem (16) is rotatably connected to a driving plate (15), and the side walls of the two retaining seats (9) on opposite sides are each provided with a clamping groove (6) corresponding to the driving plate (15).

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