Variable flow ball valve with multi-stage buffering function

Abstract

The application discloses a variable-flow ball valve with a multi-stage buffering function, and relates to the technical field of valves. The variable-flow ball valve is provided with an actuator. The ball is rotated through the actuator, so that the valve is opened or closed. A plurality of buffering units are arranged on the water inlet side of the ball valve. The annular ring of the first buffering unit preliminarily absorbs the impact force generated by water flow. The second buffering unit enlarges the flow channel, so that the water flow pressure is reduced. The third buffering unit divides the water flow, so that the impact force directly acting on the valve core and the valve seat is reduced. The fourth buffering unit physically blocks the water flow, so that the impact force of the water flow is reduced. The water flow is subjected to multi-stage buffering, the impact force of the water flow is absorbed, the impact force of the water flow is prevented from directly acting on the ball, and the service life of the ball valve is prolonged.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically a variable flow ball valve with multi-stage buffering function. Background Technology

[0002] Ball valves are commonly used for fluid regulation and control, and are also often used as valves to control the opening and closing of pipelines. The valve stem is driven by an actuator to rotate, which in turn causes the valve stem to drive the ball to rotate around the axis of the ball valve, thereby opening and closing the ball valve.

[0003] During the use of ball valves, it may be necessary to suddenly open or close the ball valve, or external factors may cause changes in the flow rate of water. Under the action of inertia, the water flow will cause water hammer effect, which will make the water flow carry a large impact force. Ordinary ball valves usually do not have a buffer mechanism, so the impact force of the water flow will directly impact the ball of the ball valve. In the long-term use, the repeated impact of the water flow may damage the ball of the ball valve, affect the sealing performance of the ball valve, or even damage the ball valve and reduce its service life. Summary of the Invention

[0004] The purpose of this invention is to provide a variable flow ball valve with multi-stage buffering function to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A variable flow ball valve with multi-stage buffering function includes a valve body, a ball, a packing assembly, a support, an actuator, a sealing mechanism, and a multi-stage buffering mechanism. The valve body has an inner cavity, in which the ball is placed. The valve body and the packing assembly are fixedly connected, the support and the packing assembly are fixedly connected, the support and the actuator are fixedly connected, two sealing mechanisms are provided, both of which are fixedly connected to the valve body and abut against the ball, the actuator and the ball are fixedly connected, and the multi-stage buffering mechanism is fixedly connected to the valve body.

[0007] By creating an inner cavity within the valve body and installing a ball within it, the ball is fixedly connected to an actuator, allowing the actuator to drive the ball to rotate and thus open or close the ball valve. A V-shaped opening at the ball's outlet enables flow regulation. A packing assembly, comprising a packing box and packing, is installed on the valve body to prevent water leakage through the gap between the packing box and the actuator. A bracket mounted on the packing box supports the actuator. Two sealing mechanisms, located on either side of the ball and abutting against it, block water flow when the ball valve is closed. A multi-stage buffer mechanism is installed on the water inlet side of the valve body to absorb the impact force of the water flow according to different flow rates, preventing damage to the ball and thus extending the valve's service life.

[0008] Furthermore, the multi-stage buffer mechanism includes a first buffer unit, a second buffer unit, a third buffer unit, a fourth buffer unit, and a locking unit. There are two first buffer units, which are arranged along the flow direction. One first buffer unit is fixedly connected to the second buffer unit, and the other first buffer unit abuts against the fourth buffer unit. The third buffer unit is fixedly connected to the valve body, and the locking unit is slidably connected to the valve body.

[0009] By setting two No. 1 buffer units, the initial impact force generated by the water flow is absorbed. When the first No. 1 buffer unit, located near the inlet, reaches its upper limit for absorbing impact force, it slides under the action of the water flow impact force, driving several No. 2 buffer units to move, thus expanding the flow channel, thereby reducing the water flow pressure and further reducing the impact force. The No. 3 buffer unit diverts the water flow, reducing the impact force directly acting on the valve core and valve seat. When the second No. 1 buffer unit reaches its upper limit for absorbing impact force, several No. 4 buffer units physically block the water flow, further reducing the impact force of the water flow. By setting a locking unit, the No. 3 buffer unit is locked when the ball valve is closed, ensuring that the ball valve can form a tight seal when closed, preventing water leakage.

[0010] Furthermore, the first buffer unit includes a connecting plate, an annular ring, and a first spring. The valve body is provided with an annular groove. The connecting plate and the annular groove are slidably connected. The annular ring and the connecting plate are fixedly connected. The first spring and the annular groove are fixedly connected. The first spring and the connecting plate are fixedly connected.

[0011] An annular groove is set in the flow channel of the valve body, and a connecting plate is installed on the annular groove. The connecting plate and the annular groove are slidably connected. The valve body and the connecting plate are connected at both ends by a No. 1 spring, which provides pre-tightening force to the connecting plate. The connecting plate is fixed by an annular ring, and the inner ring of the annular ring is smaller than the flow channel, so that when the water flows through the annular ring, the annular ring can absorb part of the impact force.

[0012] Furthermore, the second buffer unit includes a sliding plate, a first fixed rod, a first limiting block, and a second limiting block. The first fixed rod is fixedly connected to the valve body, the sliding plate is slidably connected to the first fixed rod, the first limiting block is fixedly connected to the first fixed rod, and the second limiting block is fixedly connected to the connecting plate.

[0013] When the impact force of the water flow is greater than the preload provided by the first spring, the connecting plate slides horizontally along the flow direction, thereby driving the second limiting block to slide. This allows the sliding plate to slide along the first fixed rod under the pressure of the water flow, expanding part of the flow channel and thus reducing the pressure of the water flow, thereby reducing the impact force of the water flow.

[0014] Furthermore, the third buffer unit includes a second fixed rod, a slider, and a return spring. The second fixed rod is fixedly connected to the valve body, the valve body is provided with a first sliding groove, the slider is slidably connected to the first sliding groove, the return spring is sleeved on the second fixed rod, the return spring is fixedly connected to the slider, and the valve body is provided with a connecting groove.

[0015] The valve body has a first sliding groove located between two connecting plates and is fixedly connected to the valve body by a second fixing rod. The slider is slidably connected to the second fixing rod. A return spring connects the valve body and the slider at both ends, providing a preload force to the slider. The valve body has a connecting groove, with one end located in the first sliding groove and the other end near the outlet of the flow channel. When the impact force of the water flow is greater than the preload force provided by the return spring, the slider overcomes the elastic force of the return spring and slides along the second fixing rod, thereby connecting the connecting groove around the ball and connecting the flow channel, diverting the water flow and reducing the impact force on the ball.

[0016] Furthermore, the fourth buffer unit includes a first push block, a third fixed rod, a movable plate, a torsion spring, and a baffle. The first push block and the connecting plate are fixedly connected. The valve body is provided with a movable groove. The third fixed rod is placed in the movable groove. The movable plate and the third fixed rod are rotatably connected. The first push block is provided with an inclined surface, which abuts against the movable plate. The torsion spring is sleeved on the third fixed rod. The baffle and the movable plate are fixedly connected.

[0017] When the impact force of the water flow is greater than the preload provided by the second spring, the connecting plate slides horizontally along the flow direction. It is fixed to the connecting plate by the first push block, which moves with the connecting plate. The first push block has an inclined surface and a movable plate, which pushes the movable plate to overcome the spring force of the torsion spring. At the same time, it rotates along the third fixed rod and is fixed to the movable plate by the baffle, which rotates with it. This causes the baffle to block the water flow, and the impact force of the water flow is applied to the baffle, thus absorbing the impact force.

[0018] Furthermore, the actuator includes a rotating handwheel, a transmission assembly, a rotating shaft, a valve stem, a bottom shaft, a housing, and a third limit block. The rotating handwheel and the transmission assembly are fixedly connected, the rotating shaft and the transmission assembly are connected in a transmission manner, the valve stem and the rotating shaft are fixedly connected, the valve stem and the ball are fixedly connected, the bottom shaft and the valve body are rotatably connected, the bottom shaft and the ball are fixedly connected, the housing and the bracket are fixedly connected, the rotating shaft and the housing are rotatably connected, and the third limit block and the valve body are fixedly connected.

[0019] The ball valve is opened and closed by a rotating handwheel and a transmission assembly. The rotating shaft is connected to the transmission assembly for transmission. Rotating the handwheel transmits power to the rotating shaft through the transmission assembly, causing the rotating shaft to rotate. One end of the valve stem is fixed to the rotating shaft, and the other end is fixed to the ball, causing the valve stem to drive the ball to rotate. The rotating shaft is supported by the housing and bracket. A third limit block is fixed to the valve body to limit the rotation angle of the rotating shaft, thus enabling accurate closure of the ball valve.

[0020] Furthermore, the locking unit includes a second push block, a sliding rod, a locking block, and a second spring. The second push block is fixedly connected to the rotating shaft. The valve body is provided with a second sliding groove. The sliding rod is slidably connected to the second sliding groove. The locking block is fixedly connected to the sliding rod. The second spring is sleeved on the sliding rod.

[0021] The second push block is fixed to the rotating shaft. When the ball valve is closed, the rotating handwheel is turned, causing the second push block to rotate with the rotating shaft. This push block pushes the sliding rod to slide along the second sliding groove. The sliding rod is fixed by a locking block, which locks the slider and prevents water leakage. A second spring is sleeved on the sliding rod. When the ball valve is opened, the sliding rod automatically springs open, so the locking block no longer locks the slider.

[0022] Furthermore, the transmission assembly includes a rotating shaft, a driving gear, a driven gear, a worm, and a worm wheel. The rotating shaft is fixedly connected to a rotating handwheel, the rotating shaft is rotatably connected to the housing, the driving gear is fixedly connected to the rotating shaft, the driven gear meshes with the driving gear, the worm is rotatably connected to the housing, the driven gear is fixedly connected to the worm, the worm meshes with the worm wheel, and the worm wheel is fixedly connected to the rotating shaft.

[0023] The rotating shaft is fixed to the rotating handwheel, causing the rotating shaft to rotate with the rotating handwheel. The driving gear is fixed to the rotating shaft, causing the driving gear to rotate with the rotating shaft. The driven gear is fixed to the worm, and the worm is rotatably connected to the housing. The driven gear meshes with the driving gear, causing the driving gear to drive the driven gear to rotate, which in turn drives the worm to rotate. The worm meshes with the worm wheel, causing the worm to drive the worm wheel to rotate. The worm wheel is fixed to the rotating shaft, causing the worm wheel to drive the rotating shaft to rotate.

[0024] Furthermore, the sealing mechanism includes a preload spring and a sealing ring, the preload spring and the valve body are fixedly connected, the sealing ring and the preload spring are fixedly connected, and the preload spring and the ball abut against each other.

[0025] By setting a sealing ring, the sealing ring and the ball are brought into contact, forming a tight seal when the ball valve is closed, preventing water leakage. The sealing ring is fixed to the valve body and the sealing ring at both ends by a pre-tightening spring, so that the sealing ring is always in contact with the ball, preventing the ball from being worn due to the impact of water flow, which would lead to leakage.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The first two buffer units initially absorb the impact force generated by the water flow. When the first buffer unit reaches its upper limit for absorbing impact force, the second buffer unit expands the flow channel, thereby reducing the water pressure and further reducing the impact force. When the second buffer unit reaches its upper limit, the third buffer unit diverts the water flow, reducing the impact force directly acting on the valve core and valve seat. When the second buffer unit reaches its upper limit for absorbing impact force, the fourth buffer unit physically blocks the water flow, further reducing the impact force. This allows the system to activate the buffer units according to different water flow rates, thus providing multi-stage buffering to absorb the impact force of the water flow, preventing the impact force from directly acting on the ball, reducing the probability of valve damage, and thus improving the service life of the ball valve.

[0028] 2. By setting a locking unit, the No. 3 buffer unit is automatically locked when the ball valve is closed and automatically unlocked when the ball valve is opened, thereby preventing water from leaking through the connection groove of the No. 3 buffer unit.

[0029] 3. By setting a sealing ring, the two ends of the pre-tightening spring are fixed to the valve body and the sealing ring respectively, so that the sealing ring is always in contact with the ball, preventing the ball from being worn due to the impact of water flow, which would lead to sealing failure. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0032] Figure 3 yes Figure 2 A magnified view of part A;

[0033] Figure 4 This is a schematic diagram of the structure of the second buffer unit of the present invention;

[0034] Figure 5 This is a schematic diagram of the connecting groove of the present invention.

[0035] Figure 6 This is a schematic diagram of the structure of the fourth buffer unit of the present invention;

[0036] Figure 7 This is a schematic diagram of the locking unit structure of the present invention;

[0037] Figure 8 yes Figure 7 A magnified view of a portion of C;

[0038] Figure 9 This is a schematic diagram showing the connection between the driving gear and the driven gear of the present invention;

[0039] Figure 10 This is a schematic diagram of the transmission component structure of the present invention;

[0040] Figure 11 yes Figure 2 A magnified view of a portion of B.

[0041] In the diagram: 1. Valve body; 11. Inner cavity; 12. Annular groove; 13. No. 1 sliding groove; 14. Connecting groove; 15. Movable groove; 16. No. 2 sliding groove; 2. Ball; 3. Packing assembly; 4. Support; 5. Actuator; 51. Rotary handwheel; 52. Transmission assembly; 521. Rotating shaft; 522. Drive gear; 523. Driven gear; 524. Worm; 525. Worm wheel; 53. Rotating shaft; 54. Valve stem; 55. Bottom shaft; 56. Housing; 57. No. 3 limit block; 6. Sealing mechanism; 61. Preload spring; 62. Sealing ring; 7. Multi-stage buffer mechanism; 71. No. 1 buffer unit; 7 11. Connecting plate; 712. Ring; 713. Spring No. 1; 72. Buffer Unit No. 2; 721. Sliding plate; 722. Fixed rod No. 1; 723. Limiting block No. 1; 724. Limiting block No. 2; 73. Buffer Unit No. 3; 731. Fixed rod No. 2; 732. Slider; 733. Return spring; 74. Buffer Unit No. 4; 741. Pushing block No. 1; 7411. Inclined surface; 742. Fixed rod No. 3; 743. Movable plate; 744. Torsion spring; 745. Baffle; 75. Locking unit; 751. Pushing block No. 2; 752. Sliding rod; 753. Locking block; 754. Spring No. 2. Detailed Implementation

[0042] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0043] Example: Figure 1 and Figure 2As shown, the present invention provides a flow-changing ball valve with multi-stage buffering function. The flow-changing ball valve includes a valve body 1, a ball 2, a packing assembly 3, a support 4, an actuator 5, a sealing mechanism 6, and a multi-stage buffering mechanism 7. The valve body 1 has an inner cavity 11, and the ball 2 is placed in the inner cavity 11. The valve body 1 and the packing assembly 3 are fixedly connected. The support 4 and the packing assembly 3 are fixedly connected. The support 4 and the actuator 5 are fixedly connected. There are two sealing mechanisms 6, which are fixedly connected to the valve body 1 and abut against the ball 2. The actuator 5 and the ball 2 are fixedly connected. The multi-stage buffering mechanism 7 is fixedly connected to the valve body 1.

[0044] An inner cavity 11 is provided inside the valve body 1, and a ball 2 is installed in the inner cavity 11. The ball 2 is fixedly connected to the actuator 5, so that the actuator 5 can drive the ball 2 to rotate, thereby opening and closing the ball valve. The V-shaped opening at the outlet of the ball 2 enables flow regulation. A packing assembly 3 is provided on the valve body 1. The packing assembly 3 includes a packing box and packing to prevent water leakage through the gap between the packing box and the actuator 5. The actuator 5 is fixed on the bracket 4 installed on the packing box, thereby supporting the actuator 5. Two sealing mechanisms 6 are provided, respectively located on both sides of the ball 2. Both sealing mechanisms 6 abut against the ball 2, blocking the flow of water when the ball valve is closed. A multi-stage buffer mechanism 7 is installed on the water inlet side of the valve body 1, which can absorb the impact force generated by the water flow according to different water flow rates, preventing the impact force of the water flow from damaging the ball 2, thereby improving the service life of the ball valve.

[0045] like Figure 3 As shown, the multi-stage buffer mechanism 7 includes a first buffer unit 71, a second buffer unit 72, a third buffer unit 73, a fourth buffer unit 74, and a locking unit 75. There are two first buffer units 71, which are arranged along the flow direction. One first buffer unit 71 is fixedly connected to the second buffer unit 72, and the other first buffer unit 71 abuts against the fourth buffer unit 74. The third buffer unit 73 is fixedly connected to the valve body 1, and the locking unit 75 is slidably connected to the valve body 1.

[0046] By setting two No. 1 buffer units 71, the impact force generated by the water flow is initially absorbed. When the first No. 1 buffer unit 71, located near the inlet, reaches the upper limit of absorbing the impact force, it slides under the action of the water flow impact force, driving several No. 2 buffer units 72 to move, thus expanding the flow channel, thereby reducing the water flow pressure and further reducing the impact force. The No. 3 buffer unit 73 diverts the water flow, reducing the impact force directly acting on the valve core and valve seat. When the second No. 1 buffer unit 71 reaches the upper limit of absorbing the impact force, several No. 4 buffer units 74 physically block the water flow, further reducing the impact force of the water flow. By setting a locking unit 75, the No. 3 buffer unit 73 is locked when the ball valve is closed, ensuring that the ball valve can form a tight seal when closed, preventing water leakage.

[0047] like Figure 3 As shown, the first buffer unit 71 includes a connecting plate 711, an annular ring 712 and a first spring 713. The valve body 1 is provided with an annular groove 12. The connecting plate 711 and the annular groove 12 are slidably connected. The annular ring 712 and the connecting plate 711 are fixedly connected. The first spring 713 and the annular groove 12 are fixedly connected. The first spring 713 and the connecting plate 711 are fixedly connected.

[0048] An annular groove 12 is provided on the flow channel of valve body 1, and a connecting plate 711 is installed on the annular groove 12. The connecting plate 711 and the annular groove 12 are slidably connected. The valve body 1 and the connecting plate 711 are connected at both ends by a spring 713, which provides pre-tightening force to the connecting plate 711. The connecting plate 711 is fixed by an annular ring 712, and the inner ring of the annular ring 712 is smaller than the flow channel, so that when water flows through the annular ring 712, the annular ring 712 can absorb part of the impact force.

[0049] like Figure 3 and Figure 4 As shown, the second buffer unit 72 includes a sliding plate 721, a first fixing rod 722, a first limiting block 723, and a second limiting block 724. The first fixing rod 722 is fixedly connected to the valve body 1, the sliding plate 721 is slidably connected to the first fixing rod 722, the first limiting block 723 is fixedly connected to the first fixing rod 722, and the second limiting block 724 is fixedly connected to the connecting plate 711.

[0050] When the impact force of the water flow is greater than the preload provided by the first spring 713, the connecting plate 711 slides horizontally along the flow direction, thereby driving the second limiting block 724 to slide, so that the sliding plate 721 can slide along the first fixed rod 722 under the pressure of the water flow, thereby expanding part of the flow channel, thereby reducing the pressure of the water flow, and thus reducing the impact force of the water flow.

[0051] like Figure 3 and Figure 5As shown, the third buffer unit 73 includes a second fixed rod 731, a slider 732, and a return spring 733. The second fixed rod 731 is fixedly connected to the valve body 1. The valve body 1 is provided with a first sliding groove 13. The slider 732 is slidably connected to the first sliding groove 13. The return spring 733 is sleeved on the second fixed rod 731. The return spring 733 is fixedly connected to the slider 732. The valve body 1 is provided with a connecting groove 14.

[0052] The valve body 1 has a first sliding groove 13 located between two connecting plates 711 and is fixedly connected to the valve body 1 by a second fixing rod 731. The slider 732 is slidably connected to the second fixing rod 731. The two ends of the return spring 733 are connected to the valve body 1 and the slider 732 respectively, thus providing a preload force to the slider 732. The valve body 1 has a connecting groove 14, one end of which is located in the first sliding groove 13, and the other end is close to the outlet of the flow channel. When the impact force of the water flow is greater than the preload force provided by the return spring 733, the slider 732 overcomes the elastic force of the return spring 733 and slides along the second fixing rod 731, thereby connecting the connecting groove 14 around the ball 2 to connect the flow channel, diverting the water flow and reducing the impact force on the ball 2.

[0053] like Figure 3 and Figure 6 As shown, the fourth buffer unit 74 includes a first push block 741, a third fixed rod 742, a movable plate 743, a torsion spring 744, and a baffle 745. The first push block 741 and the connecting plate 711 are fixedly connected. The valve body 1 is provided with a movable groove 15. The third fixed rod 742 is placed in the movable groove 15. The movable plate 743 and the third fixed rod 742 are rotatably connected. The first push block 741 is provided with an inclined surface 7411, which abuts against the movable plate 743. The torsion spring 744 is sleeved on the third fixed rod 742. The baffle 745 and the movable plate 743 are fixedly connected.

[0054] When the impact force of the water flow is greater than the preload provided by the second spring 713, the connecting plate 711 slides horizontally along the flow direction. It is fixed by the first push block 741 and the connecting plate 711, so that the first push block 741 moves with the connecting plate 711. The first push block 741 is provided with an inclined surface 7411 and a movable plate 743, so that the first push block 741 pushes the movable plate 743 to overcome the elastic force of the torsion spring 744. At the same time, it rotates along the third fixed rod 742. It is fixed by the baffle 745 and the movable plate 743, so that the baffle 745 rotates with it, thereby blocking the water flow. In this way, the impact force of the water flow acts on the baffle 745, achieving the effect of absorbing the impact force.

[0055] like Figure 1 , Figure 2 , Figure 7 and Figure 8As shown, the actuator 5 includes a rotating handwheel 51, a transmission assembly 52, a rotating shaft 53, a valve stem 54, a bottom shaft 55, a housing 56, and a third limit block 57. The rotating handwheel 51 and the transmission assembly 52 are fixedly connected, the rotating shaft 53 and the transmission assembly 52 are connected in a transmission manner, the valve stem 54 and the rotating shaft 53 are fixedly connected, the valve stem 54 and the ball 2 are fixedly connected, the bottom shaft 55 and the valve body 1 are rotatably connected, the bottom shaft 55 and the ball 2 are fixedly connected, the housing 56 and the bracket 4 are fixedly connected, the rotating shaft 53 and the housing 56 are rotatably connected, and the third limit block 57 and the valve body 1 are fixedly connected.

[0056] The ball valve is opened and closed by rotating the handwheel 51 and the transmission assembly 52, and driving the ball valve 2 by connecting the rotating shaft 53 and the transmission assembly 52. ​​The handwheel 51 is fixed to the rotating shaft 53 through the transmission assembly 52, and the other end of the valve stem 54 is fixed to the ball 2, thereby opening and closing the ball valve. The ball valve 53 is fixed to the housing 56 and the bracket 4, and the rotating shaft 53 is supported by rotating the housing 56. The third limit block 57 is fixedly connected to the valve body 1 to limit the rotation angle of the rotating shaft 53, thereby accurately closing the ball valve.

[0057] like Figure 8 As shown, the locking unit 75 includes a second push block 751, a sliding rod 752, a locking block 753, and a second spring 754. The second push block 751 is fixedly connected to the rotating shaft 53. The valve body 1 is provided with a second sliding groove 16. The sliding rod 752 is slidably connected to the second sliding groove 16. The locking block 753 is fixedly connected to the sliding rod 752. The second spring 754 is sleeved on the sliding rod 752.

[0058] The second push block 751 is fixed to the rotating shaft 53. When the ball valve is closed, the rotating handwheel 51 is rotated, causing the second push block 751 to rotate with the rotating shaft 53. This causes the second push block 751 to push the sliding rod 752 to slide along the second sliding groove 16. The locking block 753 is fixed to the sliding rod 752, thereby locking the slider 732 and preventing water leakage. The second spring 754 is sleeved on the sliding rod 752. When the ball valve is opened, the sliding rod 752 automatically springs open, so that the locking block 753 no longer locks the slider 732.

[0059] like Figure 9 and Figure 10As shown, the transmission assembly 52 includes a rotating shaft 521, a driving gear 522, a driven gear 523, a worm 524, and a worm wheel 525. The rotating shaft 521 is fixedly connected to the rotating handwheel 51, and the rotating shaft 521 is rotatably connected to the housing 56. The driving gear 522 is fixedly connected to the rotating shaft 521, the driven gear 523 meshes with the driving gear 522, the worm 524 is rotatably connected to the housing 56, the driven gear 523 is fixedly connected to the worm 524, the worm 524 meshes with the worm wheel 525, and the worm wheel 525 is fixedly connected to the rotating shaft 53.

[0060] The rotating shaft 521 is fixed to the rotating handwheel 51, causing the rotating shaft 521 to rotate with the rotating handwheel 51. The driving gear 522 is fixed to the rotating shaft 521, causing the driving gear 522 to rotate with the rotating shaft 521. The driven gear 523 is fixed to the worm 524, and the worm 524 is rotatably connected to the housing 56. The driven gear 523 meshes with the driving gear 522, causing the driving gear 522 to drive the driven gear 523 to rotate, which in turn drives the worm 524 to rotate. The worm 524 meshes with the worm wheel 525, causing the worm 524 to drive the worm wheel 525 to rotate. The worm wheel 525 is fixed to the rotating shaft 53, causing the worm wheel 525 to drive the rotating shaft 53 to rotate.

[0061] like Figure 11 As shown, the sealing mechanism 6 includes a preload spring 61 and a sealing ring 62. The preload spring 61 is fixedly connected to the valve body 1, the sealing ring 62 is fixedly connected to the preload spring 61, and the preload spring 61 abuts against the ball 2.

[0062] By setting a sealing ring 62, the sealing ring 62 and the ball 2 abut against each other, forming a tight seal when the ball valve is closed, preventing water leakage. The two ends of the pre-tightening spring 61 are fixed to the valve body 1 and the sealing ring 62 respectively, so that the sealing ring 62 always abuts against the ball 2, preventing the ball 2 from being worn due to the impact force of the water flow, which would lead to leakage.

[0063] Working principle: Rotating the handwheel 51 causes the drive gear 522 to drive the driven gear 523 to rotate, which in turn drives the worm gear 524 to rotate, thereby causing the worm wheel 525 to rotate. The worm wheel 525 drives the rotating shaft 53 to rotate, causing the valve stem 54 to drive the ball 2 to rotate, opening the ball valve. The second push block 751 rotates with the rotating shaft 53, causing the second spring 754 to release its elastic force. The sliding rod 752 automatically pops out, unlocking the third buffer unit 73. When the water flow through the ball valve has a large impact force, the inner ring of the annular ring 712 is smaller than the flow channel, thus absorbing part of the impact force. When the impact force of the water flow is greater than the preload provided by the first spring 713, the connecting plate 711 slides horizontally along the flow direction, causing the second limit block 724 to slide, so that the sliding plate 721 slides along the first... The sliding of the first fixed rod 722 expands part of the flow channel, thereby reducing the pressure of the water flow and thus reducing the impact force. When the impact force of the water flow through the second buffer unit 72 is greater than the preload of the return spring 733, the slider 732 slides along the second fixed rod 731, thereby connecting the connecting groove 14 to bypass the ball 2 and connect the flow channel, diverting the water flow and reducing the impact force on the ball 2. When the impact force of the water flow through the third buffer unit 73 is greater than the preload of the second first spring 713, the connecting plate 711 slides, causing the first pushing block 74 to push the movable plate 743 to rotate along the third fixed rod 742, thereby causing the baffle 745 to rotate accordingly, blocking the water flow and causing the impact force of the water flow to act on the baffle 745, thus absorbing the impact force of the water flow.

[0064] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A variable flow ball valve with multi-stage buffering function, characterized in that: The variable flow ball valve includes a valve body (1), a ball (2), a packing assembly (3), a bracket (4), an actuator (5), a sealing mechanism (6), and a multi-stage buffer mechanism (7). The valve body (1) has an inner cavity (11), the ball (2) is placed in the inner cavity (11), the valve body (1) and the packing assembly (3) are fixedly connected, the bracket (4) and the packing assembly (3) are fixedly connected, the bracket (4) and the actuator (5) are fixedly connected, there are two sealing mechanisms (6), the two sealing mechanisms (6) are fixedly connected to the valve body (1), the two sealing mechanisms (6) abut against the ball (2), the actuator (5) and the ball (2) are fixedly connected, and the multi-stage buffer mechanism (7) is fixedly connected to the valve body (1). The multi-stage buffer mechanism (7) includes a first buffer unit (71), a second buffer unit (72), a third buffer unit (73), and a fourth buffer unit (74). There are two first buffer units (71), which are arranged along the flow direction. One first buffer unit (71) is fixedly connected to the second buffer unit (72), and the other first buffer unit (71) abuts against the fourth buffer unit (74). The third buffer unit (73) is fixedly connected to the valve body (1). The first buffer unit (71) includes a connecting plate (711), an annular ring (712) and a first spring (713). The valve body (1) is provided with an annular groove (12). The connecting plate (711) and the annular groove (12) are slidably connected. The annular ring (712) and the connecting plate (711) are fixedly connected. The first spring (713) and the annular groove (12) are fixedly connected. The first spring (713) and the connecting plate (711) are fixedly connected. The second buffer unit (72) includes a sliding plate (721), a first fixed rod (722), a first limiting block (723), and a second limiting block (724). The first fixed rod (722) is fixedly connected to the valve body (1), the sliding plate (721) is slidably connected to the first fixed rod (722), the first limiting block (723) is fixedly connected to the first fixed rod (722), and the second limiting block (724) is fixedly connected to the connecting plate (711). The third buffer unit (73) includes a second fixed rod (731), a slider (732), and a return spring (733). The second fixed rod (731) is fixedly connected to the valve body (1). The valve body (1) is provided with a first sliding groove (13). The slider (732) is slidably connected to the first sliding groove (13). The return spring (733) is sleeved on the second fixed rod (731). The return spring (733) is fixedly connected to the slider (732). The valve body (1) is provided with a connecting groove (14). The fourth buffer unit (74) includes a first push block (741), a third fixed rod (742), a movable plate (743), a torsion spring (744), and a baffle (745). The first push block (741) and the connecting plate (711) are fixedly connected. The valve body (1) is provided with a movable groove (15). The third fixed rod (742) is placed in the movable groove (15). The movable plate (743) and the third fixed rod (742) are rotatably connected. The first push block (741) is provided with an inclined surface (7411). The inclined surface (7411) and the movable plate (743) abut against each other. The torsion spring (744) is sleeved on the third fixed rod (742). The baffle (745) and the movable plate (743) are fixedly connected.

2. A variable flow ball valve with multi-stage buffering function according to claim 1, characterized in that: The multi-stage buffer mechanism (7) also includes a locking unit (75), which is slidably connected to the valve body (1).

3. A variable flow ball valve with multi-stage buffering function according to claim 2, characterized in that: The actuator (5) includes a rotating handwheel (51), a transmission assembly (52), a rotating shaft (53), a valve stem (54), a bottom shaft (55), a housing (56), and a third limiting block (57). The rotating handwheel (51) and the transmission assembly (52) are fixedly connected. The rotating shaft (53) and the transmission assembly (52) are connected by transmission. The valve stem (54) and the rotating shaft (53) are fixedly connected. The valve stem (54) and the ball (2) are fixedly connected. The bottom shaft (55) and the valve body (1) are rotatably connected. The bottom shaft (55) and the ball (2) are fixedly connected. The housing (56) and the bracket (4) are fixedly connected. The rotating shaft (53) and the housing (56) are rotatably connected. The third limiting block (57) and the valve body (1) are fixedly connected.

4. A variable flow ball valve with multi-stage buffering function according to claim 3, characterized in that: The locking unit (75) includes a second push block (751), a sliding rod (752), a locking block (753), and a second spring (754). The second push block (751) is fixedly connected to the rotating shaft (53). The valve body (1) is provided with a second sliding groove (16). The sliding rod (752) is slidably connected to the second sliding groove (16). The locking block (753) is fixedly connected to the sliding rod (752). The second spring (754) is sleeved on the sliding rod (752).

5. A variable flow ball valve with multi-stage buffering function according to claim 4, characterized in that: The transmission assembly (52) includes a rotating shaft (521), a driving gear (522), a driven gear (523), a worm (524), and a worm wheel (525). The rotating shaft (521) is fixedly connected to the rotating handwheel (51), and the rotating shaft (521) is rotatably connected to the housing (56). The driving gear (522) is fixedly connected to the rotating shaft (521), and the driven gear (523) meshes with the driving gear (522). The worm (524) is rotatably connected to the housing (56), and the driven gear (523) is fixedly connected to the worm (524). The worm (524) meshes with the worm wheel (525), and the worm wheel (525) is fixedly connected to the rotating shaft (53).

6. A variable flow ball valve with multi-stage buffering function according to claim 5, characterized in that: The sealing mechanism (6) includes a preload spring (61) and a sealing ring (62). The preload spring (61) is fixedly connected to the valve body (1), the sealing ring (62) is fixedly connected to the preload spring (61), and the preload spring (61) abuts against the ball (2).

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