Sealing ball valve

Abstract

According to the technical scheme, the sealing ball valve is characterized by comprising a valve body, a ball body and a valve rod, a liquid inlet channel and a liquid outlet channel are arranged in the valve body, the ball body is connected with the valve rod and rotationally connected between the liquid inlet channel and the liquid outlet channel, a sealing face is arranged in the valve body and arranged on one side of the liquid inlet channel, and the sealing face is arranged on the other side of the liquid outlet channel. An elastic sealing seat is movably mounted between the sealing surface and the ball body; the sealing surface is provided with two groups of positioning spring pieces and two groups of movable spring pieces, and the positioning spring pieces and the movable spring pieces are arranged in the circumferential direction of the sealing surface in a staggered manner at equal intervals, so that the ball valve can provide a stable sealing effect.

Description

Technical Field

[0001] This utility model relates to a ball valve, and more specifically, to a sealing ball valve. Background Technology

[0002] A ball valve is a valve in which the valve stem drives the valve's opening and closing mechanism, causing it to rotate around the valve's axis. It can also be used for fluid regulation and control. Hard-seal V-type ball valves, in particular, have a strong shearing force between the V-shaped ball core and the metal seat, which is overlaid with hard alloy. This makes them especially suitable for media containing fibers or small solid particles. The valve core of a hard-seal ball valve is made of alloy steel by spray welding, and the sealing ring is also made of alloy steel by overlay welding. Therefore, hard-seal ball valves do not experience significant wear during opening and closing. Ball valves are a common type of valve, effectively controlling the flow of gas or liquid in pipelines.

[0003] Ball valves are characterized by good wear resistance, excellent sealing performance, and easy opening and closing. However, during use, the sealing parts of ball valves wear out quickly, leading to seal failure between the valve seat and the ball, which results in the ball valve being less durable. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a sealing ball valve that can provide a stable sealing effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sealing ball valve, comprising a valve body, a ball, and a valve stem, wherein the valve body is provided with an inlet channel and an outlet channel, the ball is connected to the valve stem and rotatably connected between the inlet channel and the outlet channel, the valve body is provided with a sealing surface, the sealing surface is provided on one side of the inlet channel, and an elastic sealing seat is movably installed between the sealing surface and the ball;

[0006] The sealing surface is provided with positioning springs and moving springs. There are two sets of both positioning springs and moving springs, which are arranged alternately at equal intervals along the circumference of the sealing surface.

[0007] The present invention is further configured such that: the elastic sealing seat includes a sealing ring and a sealing edge, the sealing edge being connected to the inner ring of the sealing ring and extending toward the liquid inlet channel.

[0008] The present invention is further configured such that: the positioning spring component includes a first spring, a first positioning rod and a first movable cylinder; a positioning groove is provided in the valve body; one end of the first positioning rod is fixedly connected in the positioning groove; and the first movable cylinder is slidably connected to the first positioning rod.

[0009] The first spring is sleeved on the first positioning rod, and one end of the first spring is connected to the positioning groove, and the other end is connected to the first moving cylinder;

[0010] The other end of the first movable cylinder is connected to an elastic sealing seat.

[0011] The present invention is further configured such that: the movable spring component includes a second spring, a second positioning rod, a second movable cylinder, a piston plate, and a driving component; the valve body is provided with a movable groove; and the driving component is used to drive the piston plate to move within the movable groove.

[0012] The second positioning rod is fixedly connected to the piston plate, and the second movable cylinder is slidably connected to the second positioning rod;

[0013] The second spring is sleeved on the second positioning rod, and one end of the second spring is connected to the piston plate, and the other end is connected to the second moving cylinder;

[0014] The other end of the second movable cylinder is connected to the elastic sealing seat.

[0015] The present invention is further configured such that: a pressure chamber and a drive chamber are provided in the valve body, the pressure chamber is connected to the drive chamber and the moving groove respectively, and the drive component is disposed in the drive chamber.

[0016] The present invention is further configured such that: the driving component includes a driving block, a driving structure, a transmission rod and a piston moving plate, the piston moving plate is movably connected in the air pressure chamber, one end of the transmission rod is fixedly connected to the piston moving plate, and the other end is linked to the driving block;

[0017] The drive structure is used to control the movement of the drive block.

[0018] The present invention is further configured such that both the drive block and the transmission rod are provided with transmission inclined surfaces.

[0019] The present invention is further configured such that: the driving structure includes a guide rod and a threaded rod, the driving block is slidably connected to the guide rod and threadedly engaged with the threaded rod.

[0020] The present invention is further configured such that: one end of the threaded rod is provided with a toggle block, and the toggle block is located on the outside of the valve body.

[0021] In summary, this utility model has the following beneficial effects: through the design of the positioning spring and the moving spring, when the moving spring is not adjusted, the positioning spring and the moving spring can push the elastic sealing seat to circumferentially abut against the ball to form a seal.

[0022] After prolonged use, the performance of the spring and the elastic sealing seat will change. At this time, the contact between the elastic sealing seat and the ball can be changed by adjusting the moving spring, thereby maintaining the sealing effect. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of a ball valve;

[0024] Figure 2 for Figure 1 Enlarged view of point A;

[0025] Figure 3 A structural schematic diagram showing the position of the positioning spring component;

[0026] Figure 4 This is a three-dimensional structural diagram of the elastic sealing seat;

[0027] Figure 5 A schematic diagram of Li Tianran's driving structure.

[0028] Reference numerals: 1. Valve body; 11. Inlet channel; 12. Outlet channel; 13. Sealing surface; 14. Positioning groove; 15. Moving groove; 16. Pressure chamber; 17. Drive chamber; 2. Ball; 3. Valve stem; 4. Elastic sealing seat; 41. Sealing ring; 42. Sealing edge; 5. Positioning spring; 51. First spring; 52. First positioning rod; 53. First moving cylinder; 6. Moving spring; 61. Second spring; 62. Second positioning rod; 63. Second moving cylinder; 64. Piston plate; 65. Drive component; 651. Drive block; 652. Drive structure; 653. Transmission rod; 654. Piston moving plate; 655. Transmission inclined surface; 7. Guide rod; 71. Threaded rod; 72. Actuating block. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0030] Reference Figures 1 to 5 As shown, to achieve the above objectives, the present invention provides the following technical solution: a sealing ball valve, comprising a valve body 1, a ball 2, and a valve stem 3, wherein the valve body 1 is provided with an inlet channel 11 and an outlet channel 12, the ball 2 is connected to the valve stem 3 and rotatably connected between the inlet channel 11 and the outlet channel 12, the valve body 1 is provided with a sealing surface 13, the sealing surface 13 is provided on one side of the inlet channel 11, and an elastic sealing seat 4 is movably installed between the sealing surface 13 and the ball 2;

[0031] The sealing surface 13 is provided with a positioning spring 5 and a moving spring 6. There are two sets of both the positioning spring 5 and the moving spring 6, which are arranged alternately at equal intervals along the circumference of the sealing surface 13.

[0032] The design of this utility model, through the design of positioning spring 5 and moving spring 6, allows the positioning spring 5 and moving spring 6 to push the elastic sealing seat 4 to circumferentially abut against the ball 2 when the moving spring 6 is not adjusted, thus forming a seal.

[0033] After prolonged use, the performance of the spring and the elastic sealing seat 4 will change. At this time, the contact between the elastic sealing seat 4 and the ball 2 can be changed by adjusting the moving spring 6, so as to maintain the sealing effect.

[0034] The present invention is further configured such that: the elastic sealing seat 4 includes a sealing ring 41 and a sealing edge 42, the sealing edge 42 is connected to the inner ring of the sealing ring 41 and extends toward the liquid inlet channel 11.

[0035] like Figure 4 As shown, in this structure, the positioning spring 5 and the moving spring 6 are connected and cooperate with the sealing ring 41, and the sealing edge 42 can abut against the pipe wall of the valve body 1, thereby maintaining the effectiveness of the seal during the movement of the elastic sealing seat 4.

[0036] The present invention is further configured such that: the positioning spring component 5 includes a first spring 51, a first positioning rod 52 and a first moving cylinder 53, a positioning groove 14 is provided in the valve body 1, one end of the first positioning rod 52 is fixedly connected in the positioning groove 14, and the first moving cylinder 53 is slidably connected to the first positioning rod 52.

[0037] The first spring 51 is sleeved on the first positioning rod 52, and one end of the first spring 51 is connected to the positioning groove 14, and the other end is connected to the first moving cylinder 53.

[0038] The other end of the first movable cylinder 53 is connected to the elastic sealing seat 4.

[0039] like Figure 3 As shown, under the action of the first spring 51, the first moving cylinder 53 and the elastic sealing seat 4 will always be pushed to move towards the ball 2, thereby achieving a sealing effect.

[0040] The first positioning rod 52 not only ensures the guiding function of the first moving cylinder 53, but also facilitates the installation of the first spring 51.

[0041] The present invention is further configured such that: the movable spring component 6 includes a second spring 61, a second positioning rod 62, a second movable cylinder 63, a piston plate 64 and a driving component 65; a movable groove 15 is provided in the valve body 1; and the driving component 65 is used to drive the piston plate 64 to move within the movable groove 15.

[0042] The second positioning rod 62 is fixedly connected to the piston plate 64, and the second moving cylinder 63 is slidably connected to the second positioning rod 62;

[0043] The second spring 61 is sleeved on the second positioning rod 62, and one end of the second spring 61 is connected to the piston plate 64, and the other end is connected to the second moving cylinder 63;

[0044] The other end of the second movable cylinder 63 is connected to the elastic sealing seat 4.

[0045] Under the action of the second spring 61, the second moving cylinder 63 and the elastic sealing seat 4 will always be pushed to move towards the ball 2, thereby achieving a sealing effect.

[0046] Similarly, under the action of the second positioning rod 62, it not only ensures the guiding function of the second moving cylinder 63, but also facilitates the installation of the second spring 61.

[0047] In addition, the piston plate 64 can be moved by the drive component 65. When the piston plate 64 moves toward the ball 2, the positions of the second spring 61, the second positioning rod 62 and the second moving cylinder 63 can be changed, thereby further pushing the elastic sealing seat 4 to abut against the ball 2, thus maintaining the original sealing effect.

[0048] The present invention is further configured such that: a pressure chamber 16 and a drive chamber 17 are provided inside the valve body 1, the pressure chamber 16 is connected to the drive chamber 17 and the moving groove 15 respectively, and the drive component 65 is provided inside the drive chamber 17.

[0049] The present invention is further configured such that: the driving component 65 includes a driving block 651, a driving structure 652, a transmission rod 653 and a piston moving plate 654, the piston moving plate 654 is movably connected in the pneumatic chamber 16, one end of the transmission rod 653 is fixedly connected to the piston moving plate 654, and the other end is linked to the driving block 651.

[0050] The drive structure 652 is used to control the movement of the drive block 651.

[0051] The present invention is further configured such that both the drive block 651 and the transmission rod 653 are provided with a transmission inclined surface 655.

[0052] The design of this structure controls the movement of the drive block 651 through the drive structure 652. At this time, the drive block 651 abuts against the transmission inclined surface 655 of the transmission rod 653. As the drive block 651 moves gradually, it will push the transmission rod 653 to move, thereby causing the piston moving plate 654 to move in the air pressure chamber 16, compressing the space of the air pressure chamber 16 and increasing the internal pressure.

[0053] When the pressure increases, it acts on the piston plate 64, thereby pushing the piston plate 64 to move, causing the positions of the second spring 61, the second positioning rod 62 and the second moving cylinder 63 to change, so that the elastic sealing seat 4 is squeezed towards the ball 2.

[0054] The present invention is further configured such that: the drive structure 652 includes a guide rod 7 and a threaded rod 71, the drive block 651 is slidably connected to the guide rod 7 and threadedly engaged with the threaded rod 71. One end of the threaded rod 71 is provided with an actuating block 72, which is located on the outside of the valve body 1.

[0055] like Figure 5 As shown, when the external rotating block 72 is rotated, the threaded rod 71 rotates, and the driving block 651 engages with the threaded rod 71, causing the driving block 651 to move along the guide rod 7, thus playing a role in linkage with the transmission rod 653.

[0056] When the actuating block 72 rotates, under the action of the elastic sealing seat 4 and the elastic force of the second spring 61, it acts in the opposite direction on the piston plate 64, thereby squeezing the air pressure chamber 16 in the opposite direction, causing the piston moving plate 654 and the transmission rod 653 to return to their original positions.

[0057] Alternatively, a return spring can be provided on the piston plate 64, which will directly reset the piston when the actuating block 72 rotates.

[0058] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A sealing ball valve, comprising a valve body (1), a ball (2), and a valve stem (3), wherein the valve body (1) is provided with an inlet channel (11) and an outlet channel (12), and the ball (2) is connected to the valve stem (3) and rotatably connected between the inlet channel (11) and the outlet channel (12), characterized in that: The valve body (1) is provided with a sealing surface (13), which is located on one side of the liquid inlet channel (11). An elastic sealing seat (4) is movably installed between the sealing surface (13) and the ball (2). The sealing surface (13) is provided with a positioning spring (5) and a moving spring (6). There are two sets of both the positioning spring (5) and the moving spring (6), which are arranged in an alternating pattern at equal intervals along the circumference of the sealing surface (13).

2. A sealing ball valve according to claim 1, characterized in that: The elastic sealing seat (4) includes a sealing ring (41) and a sealing edge (42), wherein the sealing edge (42) is connected to the inner ring of the sealing ring (41) and extends toward the liquid inlet channel (11).

3. A sealing ball valve according to claim 1, characterized in that: The positioning spring component (5) includes a first spring (51), a first positioning rod (52) and a first moving cylinder (53). The valve body (1) is provided with a positioning groove (14). One end of the first positioning rod (52) is fixedly connected to the positioning groove (14), and the first moving cylinder (53) is slidably connected to the first positioning rod (52). The first spring (51) is sleeved on the first positioning rod (52), and one end of the first spring (51) is connected to the positioning groove (14), and the other end is connected to the first moving cylinder (53); The other end of the first movable cylinder (53) is connected to the elastic sealing seat (4).

4. A sealing ball valve according to claim 1, characterized in that: The movable spring component (6) includes a second spring (61), a second positioning rod (62), a second movable cylinder (63), a piston plate (64), and a driving component (65). The valve body (1) is provided with a movable groove (15), and the driving component (65) is used to drive the piston plate (64) to move within the movable groove (15). The second positioning rod (62) is fixedly connected to the piston plate (64), and the second moving cylinder (63) is slidably connected to the second positioning rod (62); The second spring (61) is sleeved on the second positioning rod (62), and one end of the second spring (61) is connected to the piston plate (64), and the other end is connected to the second moving cylinder (63); The other end of the second movable cylinder (63) is connected to the elastic sealing seat (4).

5. A sealing ball valve according to claim 4, characterized in that: The valve body (1) is provided with a pneumatic chamber (16) and a drive chamber (17). The pneumatic chamber (16) is connected to the drive chamber (17) and the moving groove (15) respectively. The drive component (65) is disposed in the drive chamber (17).

6. A sealing ball valve according to claim 5, characterized in that: The driving component (65) includes a driving block (651), a driving structure (652), a transmission rod (653), and a piston moving plate (654). The piston moving plate (654) is movably connected to the air pressure chamber (16). One end of the transmission rod (653) is fixedly connected to the piston moving plate (654), and the other end is linked to the driving block (651). The drive structure (652) is used to control the movement of the drive block.

7. A sealing ball valve according to claim 6, characterized in that: Both the drive block (651) and the transmission rod (653) are provided with transmission inclined surfaces (655).

8. A sealing ball valve according to claim 6, characterized in that: The drive structure (652) includes a guide rod (7) and a threaded rod (71), and the drive block (651) is slidably connected to the guide rod (7) and threadedly engaged with the threaded rod (71).

9. A sealing ball valve according to claim 8, characterized in that: One end of the threaded rod (71) is provided with a toggle block (72), which is located on the outside of the valve body (1).

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