A ball valve for chemical solution transmission

Abstract

The present application discloses a ball valve for chemical solution transmission, and relates to a ball valve, which includes a valve body, a valve stem rotatably connected to the ball body, and a ball valve for controlling the rotation of the ball body, wherein the ball body is provided with a through hole extending along the liquid flow direction in the valve body, and the inner wall of the valve body is provided with an upper ball groove and a lower ball groove for the ball body to be rotatably connected, and a receiving groove is provided on the hole wall of the through hole close to the lower ball groove, and a liquid outlet circular hole axially connected to the receiving groove is provided on the side of the ball body away from the valve stem in a direction perpendicular to the axis of the through hole, and the axis of the liquid outlet circular hole passes through the center of the ball body; a blocking ball for blocking the liquid outlet circular hole is provided in the receiving groove for upward and downward movement, and a gap is left between the blocking ball and the receiving groove for residual liquid to pass through; a drainage hole coaxial with the liquid outlet circular hole is provided on the side of the valve body away from the valve stem; and an opening and closing mechanism for controlling the blocking ball to open or block the liquid outlet circular hole is provided between the ball body and the valve body. The present application can reduce the residual liquid accumulated in the ball after the ball valve is closed.

Description

Technical Field

[0001] The present application relates to a ball valve, and in particular to a ball valve for transmitting chemical solutions. Background Art

[0002] Ball valves are mainly used to cut off, distribute and change the flow direction of the medium in pipelines, and are widely used in transportation pipelines such as chemical solutions.

[0003] The existing ball valve comprises a valve body, a ball rotatably connected in the valve body, and a valve stem for controlling the rotation of the ball. The ball has an axially penetrating through hole for communicating the water inlet and the water outlet of the valve body.

[0004] When the valve stem rotates and controls the ball to rotate and close the flow channel of the valve body, liquid will remain in the through hole of the ball. When the ball valve is closed for a long time, the liquid remaining in the through hole is easy to deteriorate or even corrode the ball, and mix into the new solution after the ball valve is opened, affecting the quality of the solution. Summary of the invention

[0005] In order to reduce the residual liquid accumulated in the ball after the ball valve is closed, the present application provides a ball valve for transmitting chemical solutions.

[0006] The present application provides a ball valve for chemical solution transmission, which adopts the following technical solution:

[0007] A ball valve for chemical solution transmission, comprising a valve body, a valve stem rotatably connected to the ball body and controlling the rotation of the ball body, the ball body having a through hole extending along the flow direction of liquid in the valve body, the inner wall of the valve body having an upper ball groove and a lower ball groove for the ball body to be rotatably connected, a receiving groove being provided on the hole wall of the through hole close to the lower ball groove, a liquid outlet circular hole axially connected to the receiving groove being provided on the side of the ball body away from the valve stem in a direction perpendicular to the axis of the through hole, the axis of the liquid outlet circular hole passing through the center of the ball body; A blocking ball for blocking the liquid outlet circular hole is movably arranged in the receiving groove, and a gap is left between the blocking ball and the receiving groove for residual liquid to pass through; a drainage hole coaxial with the liquid outlet circular hole is penetrated through the side of the valve body away from the valve stem; an opening and closing mechanism for controlling the blocking ball to open or block the liquid outlet circular hole is arranged between the ball and the valve body; when the ball is connected to the valve body, the blocking ball is in a state of blocking the liquid outlet circular hole; when the ball closes the valve body, the blocking ball is in a state of opening the liquid outlet circular hole to allow residual liquid in the through hole to be discharged.

[0008] By adopting the above technical solution, when the ball rotates to close the flow channel of the valve body, the opening and closing mechanism will drive the blocking ball to move upward, so that the liquid outlet circular hole is opened, and the liquid is discharged from the liquid outlet circular hole and the drain hole through the gap between the blocking ball and the receiving groove, so that no residual liquid will accumulate in the through hole. When the flow channel of the valve body is opened, the opening and closing mechanism will control the blocking ball to move downward and block the liquid outlet circular hole, so that the liquid that has entered the valve body will not enter the liquid outlet circular hole.

[0009] Optionally, the opening and closing mechanism includes a magnet column and an arc-shaped magnet bar; the magnet column is fixed at the bottom of the blocking ball, the bottom of the accommodating groove is penetrated by a movable hole connected to the lower groove body, the movable hole is parallel to the liquid outlet circular hole, the arc-shaped magnet bar is fixed in the lower ball groove, and the axis of the arc-shaped magnet bar coincides with the axis of the liquid discharge hole; the arc-shaped magnet bar is located on the moving trajectory of the movable hole; the arc-shaped magnet bar and the magnet column both include S grade and N grade; when the valve body is connected to the sphere, the magnetic pole of the magnet column away from one end of the sphere is located on the opposite trajectory to the magnetic pole of the arc-shaped magnet bar; when the sphere closes the valve body, the magnetic pole of the magnet column away from one end of the sphere is located on the same trajectory as the magnetic pole of the arc-shaped magnet bar.

[0010] By adopting the above technical solution, when the ball closes the valve body, the arc-shaped magnet bar provides an upward repulsive force to the magnet column, causing the plug to move upward and separate from the liquid outlet circular hole, so that the liquid can be discharged from the liquid outlet circular hole, reducing the residual liquid in the through hole.

[0011] Optionally, a mounting groove for installing the arc-shaped magnet bar is opened on the lower ball groove, and the arc-shaped magnet bar is installed in the mounting groove.

[0012] Optionally, two magnet columns are provided, and the two magnet columns are parallel to each other.

[0013] By adopting the above technical solution, the arrangement of two magnet strips can improve the stability of the plug when it is raised or lowered.

[0014] Optionally, a side of the blocking ball close to the liquid outlet circular hole is wrapped with a sealing gasket for sealing the liquid outlet circular hole and the movable hole.

[0015] By adopting the above technical solution and setting the sealing gasket, the sealing effect of the plug on the liquid outlet circular hole can be further enhanced.

[0016] Optionally, a limiting member for preventing the blocking ball from escaping from the accommodating groove is provided at the notch of the accommodating groove.

[0017] By adopting the above technical solution and setting of the limiting member, the blocking ball can be effectively prevented from escaping from the accommodating groove.

[0018] Optionally, the limiting member includes a limiting rod, both ends of which are respectively connected to the groove wall of the accommodating groove; when the blocking ball abuts against the limiting rod, the liquid outlet circular hole is in an open state.

[0019] By adopting the above technical solution and setting the limiting rod, the blocking ball can be restricted from moving between the bottom of the accommodating groove and the limiting rod.

[0020] Optionally, a plug for sealing an outlet end of the drainage hole is detachably connected to the valve body.

[0021] By adopting the above technical solution, when not in use, the drain hole can be blocked with the help of a plug to prevent debris from entering the valve body through the drain hole.

[0022] In summary, the present application includes at least one of the following beneficial effects:

[0023] The present application can reduce the residual liquid in the ball when the valve body is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of this embodiment;

[0025] Figure 2 is a cross-sectional schematic diagram of a sphere in this embodiment;

[0026] Figure 3 is a schematic cross-sectional view of the sphere of this embodiment;

[0027] Figure 4 2 is a schematic cross-sectional view of the valve body of this embodiment.

[0028] Explanation of the reference numerals in the accompanying drawings: 1. valve body; 2. ball; 3. valve stem; 4. through hole; 5. upper ball groove; 6. lower ball groove; 7. receiving groove; 8. liquid outlet circular hole; 9. liquid discharge hole; 10. blocking ball; 11. magnet column; 12. arc-shaped magnet bar; 13. movable hole; 14. mounting groove; 15. sealing gasket; 16. plug; 17. limit rod. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings.

[0030] The present application embodiment discloses a ball valve for chemical solution transmission. Figure 1 , 2 The ball valve includes a valve body 1, a ball 2 rotatably connected to the valve body 1, and a valve stem 3 connected to the ball 2. The ball 2 is provided with a through hole 4 passing through the liquid flow direction in the valve body 1. The valve stem 3 opens and closes the valve body 1 by controlling the rotation of the ball 2.

[0031] Reference Figure 2The inner wall of the valve body 1 is provided with an upper ball groove 5 and a lower ball groove 6 for rotationally connecting the ball 2. The ball 2 is rotationally connected between the upper ball groove 5 and the lower ball groove 6 through a sealing ring. A receiving groove 7 is provided on the hole wall of the through hole 4 near the lower ball groove 6, and the receiving groove 7 is perpendicular to the axial direction of the through hole 4. A liquid outlet circular hole 8 penetrating the ball 2 is provided at the bottom of the receiving groove 7, and the axis of the liquid outlet circular hole 8 passes through the center of the ball 2. A drainage hole 9 connected to the lower ball groove 6 is provided through the bottom of the valve body 1, and the axis of the drainage hole 9 coincides with the axis of the liquid outlet circular hole 8. The liquid in the ball 2 can be discharged from the valve body 1 through the drainage hole 9 and the liquid outlet circular hole 8.

[0032] Reference Figure 2 , 3 A blocking ball 10 is placed in the receiving groove 7. The blocking ball 10 moves up and down in the receiving groove 7 and is used to block the liquid outlet circular hole 8. The receiving groove 7 is a rectangular structure, and a gap for liquid to pass through is formed between the receiving groove 7 and the blocking ball 10. In the absence of external force, the blocking ball 10 will block the liquid outlet circular hole 8 under the action of its own gravity to prevent the liquid from flowing out of the valve body 1.

[0033] Reference Figure 2 , 3 An opening and closing mechanism is provided between the ball 2 and the valve body 1, and the opening and closing mechanism realizes the opening or closing of the liquid outlet circular hole 8 by controlling the up and down movement of the blocking ball 10. When the ball 2 is connected to the valve body 1, the blocking ball 10 is in a state of blocking the liquid outlet circular hole 8; when the ball 2 closes the valve body 1, the blocking ball 10 is in a state of opening the liquid outlet circular hole 8, so that the residual liquid in the through hole 4 can be discharged through the liquid outlet circular hole 8 and the drain hole 9.

[0034] Specifically, refer to Figure 3 , 4 The opening and closing mechanism includes a magnet column 11 and an arc-shaped magnet bar 12. Two magnet columns 11 are provided. The two magnet columns 11 are parallel to each other and symmetrically arranged around an axis of the blocking ball 10. A movable hole 13 is formed through the bottom of the accommodating groove 7 and is connected to the lower groove body for sliding connection of the magnet column 11. The movable hole 13 is parallel to the liquid outlet circular hole 8, and the magnet column 11 is inserted into the movable hole 13.

[0035] The lower ball groove 6 is provided with a mounting groove 14 for mounting the arc-shaped magnet strip 12. The arc-shaped magnet strip 12 is embedded in the mounting groove 14, and the arc opening of the arc-shaped magnet strip 12 faces the direction of the drainage hole 9, and the axis of the arc-shaped magnet strip 12 is coaxial with the drainage hole 9. The arc-shaped magnet strip 12 is always located on the rotation path of the movable hole 13. The arc-shaped magnet strip 12 and the magnet column 11 both include S level and N level. This embodiment is described by taking the end of the magnet column 11 away from the sphere 2 as N level as an example.

[0036] When the valve body 1 is completely closed, the magnet column 11 moves with the movable hole 13 to the N level of the arc-shaped magnet bar 12, that is, the magnet column 11 is located at the same position as the magnetic pole of the arc-shaped magnet bar 12. At this time, the arc-shaped magnet bar 12 exerts an upward repulsive force on the magnet column 11, so that the sphere 2 moves upward and moves in a direction away from the liquid outlet hole 8, so that the liquid outlet hole 8 is in an open state, and the liquid remaining in the through hole 4 can be discharged through the liquid outlet hole 8.

[0037] When the valve body 1 is opened, the magnet column 11 is separated from the N-level arc-shaped magnet strip 12, so that the blocking ball 10 seals the liquid outlet hole 8 under the action of its own gravity, and when the flow of the valve body 1 is opened to the maximum state, the magnet column 11 is located at the S-level of the arc-shaped magnet strip 12. At this time, the arc-shaped magnet strip 12 exerts the maximum suction force on the magnet column 11, further improving the sealing effect of the blocking ball 10. It should be noted here that when the ball 2 completes closing the flow channel of the valve body 1, the magnet column 11 is located at the maximum repulsive end of the N-level arc-shaped magnet strip 12, that is, at this time, the magnet column 11 can use the repulsive force brought by the arc-shaped magnet strip 12 to enable the blocking ball 10 to overcome its own gravity and the external force generated by the liquid, thereby lifting the blocking ball 10 to separate from the liquid outlet hole 8. When the ball 2 opens the flow channel of the valve body 1, the repulsive force brought to the ball 2 by the arc-shaped magnet strip 12 disappears, so that the ball 2 can timely block the liquid outlet hole 8.

[0038] Reference Figure 3 In order to improve the sealing effect of the blocking ball 10, a sealing gasket 15 is wrapped on one side of the blocking ball 10 close to the liquid outlet hole 8. When the blocking ball 10 blocks the liquid outlet hole 8, the sealing gasket 15 can seal the liquid outlet hole 8 and the movable hole 13.

[0039] Reference Figure 3 In order to prevent the blocking ball 10 from escaping from the receiving groove 7, a limiting member is fixed at the groove of the receiving groove 7. Specifically, the limiting member includes a limiting rod 17, and both ends of the limiting rod 17 are respectively fixedly connected to the groove wall of the receiving groove 7. When the blocking ball 10 abuts against the limiting rod 17, the liquid outlet circular hole 8 is in an open state.

[0040] Reference Figure 2 The valve body 1 is also provided with a plug 16 for blocking the drain hole 9. The plug 16 can be made of rubber material. When the liquid is drained, the outlet end of the drain hole 9 can be blocked with the help of the plug 16.

[0041] The implementation principle of a ball valve for chemical solution transmission in the embodiment of the present application is:

[0042] When the valve stem 3 drives the ball 2 to close the flow channel of the valve body 1, the arc-shaped magnet bar 12 in the lower ball groove 6 provides an upward repulsive force to the magnet column 11, so that the blocking ball 10 moves upward and opens the liquid outlet circular hole 8. The liquid remaining in the through hole 4 is discharged from the valve body 1 through the liquid outlet circular hole 8 and the drain hole 9.

[0043] When the valve body 1 drives the ball 2 to open the flow channel of the valve body 1, the magnet column 11 leaves the end having the same magnetic pole as the arc-shaped magnet bar 12, so that the plug 16 can block the liquid outlet hole 8 under the action of its own gravity.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A ball valve for transmitting chemical solutions, comprising a valve body (1), a valve stem (3) rotatably connected to a ball body (2) and controlling the rotation of the ball body (2), wherein the ball body (2) is penetrated by a through hole (4) extending in the flow direction of liquid in the valve body (1), and characterized in that: The inner wall of the valve body (1) is provided with an upper ball groove (5) and a lower ball groove (6) for rotationally connecting the ball (2); a receiving groove (7) is provided on the hole wall of the through hole (4) near the lower ball groove (6); a liquid outlet circular hole (8) axially connected to the receiving groove (7) is provided on the side of the ball (2) away from the valve stem (3) in a direction perpendicular to the axis of the through hole (4); the axis of the liquid outlet circular hole (8) passes through the center of the ball (2); a blocking ball (1) for blocking the liquid outlet circular hole (8) is movably arranged in the receiving groove (7) 0), a gap is left between the blocking ball (10) and the containing groove (7) for residual liquid to pass through; a liquid discharge hole (9) coaxial with the liquid outlet hole (8) is formed through the side of the valve body (1) away from the valve stem (3); an opening and closing mechanism for controlling the blocking ball (10) to open or block the liquid outlet hole (8) is provided between the ball (2) and the valve body (1); when the ball (2) is connected to the valve body (1), the blocking ball (10) is in a state of blocking the liquid outlet hole (8); when the ball (2) closes the valve body (1), the blocking ball (10) is in a state of blocking the liquid outlet hole (8); 0) is in a state of opening the liquid outlet circular hole (8) to allow residual liquid in the through hole (4) to be discharged; the opening and closing mechanism comprises a magnet column (11) and an arc-shaped magnet bar (12); the magnet column (11) is fixed to the bottom of the blocking ball (10); a movable hole (13) connected to the lower tank body is formed through the bottom of the containing groove (7); the movable hole (13) is parallel to the liquid outlet circular hole (8); the arc-shaped magnet bar (12) is fixed in the lower ball groove (6); the axis of the arc-shaped magnet bar (12) is aligned with the axis of the liquid outlet hole (9); The axes coincide; the arc-shaped magnet strip (12) is located on the moving track of the movable hole (13); the arc-shaped magnet strip (12) and the magnet column (11) both include S level and N level; when the valve body (1) is connected to the sphere (2), the magnetic pole of the magnet column (11) away from the sphere (2) is located on a track opposite to the magnetic pole of the arc-shaped magnet strip (12); when the sphere (2) closes the valve body (1), the magnetic pole of the magnet column (11) away from the sphere (2) is located on the same track as the magnetic pole of the arc-shaped magnet strip (12).

2. A ball valve for chemical solution transmission according to claim 1, characterized in that: The lower ball groove (6) is provided with a mounting groove (14) for mounting the arc-shaped magnet strip (12), and the arc-shaped magnet strip (12) is mounted in the mounting groove (14).

3. A ball valve for chemical solution transmission according to claim 1, characterized in that: Two magnet columns (11) are provided, and the two magnet columns (11) are parallel to each other.

4. A ball valve for chemical solution transmission according to claim 1, characterized in that: A sealing gasket (15) for sealing the liquid outlet circular hole (8) and the movable hole (13) is wrapped on one side of the blocking ball (10) close to the liquid outlet circular hole (8).

5. The ball valve for chemical solution transmission according to claim 1, characterized in that: A limiting member is provided at the notch of the accommodating groove (7) for preventing the blocking ball (10) from escaping from the accommodating groove (7).

6. A ball valve for chemical solution transmission according to claim 5, characterized in that: The limiting member comprises a limiting rod (17), the two ends of which are respectively connected to the groove wall of the containing groove (7); when the blocking ball (10) abuts against the limiting rod (17), the liquid outlet circular hole (8) is in an open state.

7. The ball valve for chemical solution transmission according to claim 1, characterized in that: The valve body (1) is detachably connected to a plug (16) for sealing the outlet end of the drainage hole (9).

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