A pressure balanced regulating ball valve

Abstract

The present application relates to the technical field of ball valves, and provides a pressure-balanced regulating ball valve, including a valve body, a valve seat, a ball and a valve stem, wherein a flow cavity, an inlet flow channel and an outlet flow channel are respectively provided in the valve body, and the inlet flow channel and the outlet flow channel are both connected to the flow cavity; the valve seat is arranged in the flow cavity, the ball is rotatably installed in the valve seat, one end of the valve stem is connected to the ball, and the other end passes through the valve body and is connected to a driving member; the outer wall of the ball is provided with a first connecting hole that penetrates the ball, and the outer wall of the valve seat is provided with a first flow port that is connected to the inside of the valve seat; a surrounding cavity surrounding the valve seat is formed between the outer wall of the valve seat and the inner wall of the flow cavity, and the inlet flow channel and the two first flow ports are both connected to the surrounding cavity; the outer wall of the ball is provided with a second connecting hole, and the outlet end of the second connecting hole is connected to the outlet flow channel. A pressure-balanced regulating ball valve of the present application can reduce the lateral force on the ball.

Description

Technical Field

[0001] The present application relates to the technical field of ball valves, and in particular to a pressure-balanced regulating ball valve. Background Art

[0002] A ball valve is a fluid control valve whose closing part is a sphere. The ball is rotated 90° around the axis of the valve stem to achieve the purpose of opening and closing. Ball valves are mainly used to cut off, distribute and change the flow direction of media on pipelines. They are widely used in the fields of petroleum, chemical industry, metallurgy, power stations, light industry, etc.

[0003] In the prior art, the ball valve mainly includes a valve body, a valve cover, a valve seat, a ball, a valve stem and a sealing structure. A certain torque is applied to the valve stem with the help of a handle or other tools and transmitted to the ball, so that the through hole of the ball coincides or is perpendicular to the channel center line of the valve body, thereby realizing the opening and closing of the ball valve; by controlling the rotation angle of the ball, the channel area of ​​the fluid can be changed, thereby realizing the regulation of the flow rate of the ball valve.

[0004] However, this type of ball valve is usually straight-through, that is, the flow direction of the fluid is a straight line. When the ball valve is closed, when the fluid in front of the valve has a certain pressure, the fluid pressure forms a lateral force on the ball. This lateral force is concentrated on the valve stem, resulting in large resistance to the rotation of the valve stem and more laborious opening and closing operations. Therefore, further improvement is needed. Summary of the invention

[0005] In order to reduce the lateral force exerted on the ball, the present application provides a pressure-balanced regulating ball valve.

[0006] The pressure-balanced regulating ball valve provided in this application adopts the following technical solution:

[0007] A pressure-balanced regulating ball valve comprises a valve body, a valve seat, a ball and a valve stem, wherein a flow cavity, an inlet flow channel and an outlet flow channel are respectively arranged in the valve body, wherein the inlet flow channel and the outlet flow channel are both connected to the flow cavity, and the inlet flow channel, the outlet flow channel and the flow cavity are combined to form an S-shaped streamlined flow channel; the valve seat is arranged in the flow cavity, the ball is rotatably installed in the valve seat, one end of the valve stem is connected to the ball, and the other end passes through the valve body and is connected to a driving member; the outer wall of the ball is provided with a first connecting hole penetrating the ball, the outer wall of the valve seat is provided with a first flow port connected to the inside of the valve seat, the first flow port is provided with two and is arranged corresponding to the two ends of the first connecting hole; a surrounding cavity surrounding the valve seat is formed between the outer wall of the valve seat and the inner wall of the flow cavity, the inlet flow channel and the two first flow ports are both connected to the surrounding cavity; the outer wall of the ball is provided with a second connecting hole connected to the first connecting hole, and the outlet end of the second connecting hole is connected to the outlet flow channel.

[0008] By adopting the above technical solution, through the arrangement of the surrounding cavity, the first connecting hole and the first flow port, when the ball is in the open state, the fluid flows from the inlet flow channel to the surrounding cavity, and flows from the first flow port into the first connecting hole, and then flows to the outlet flow channel through the second connecting hole; the number of the second flow ports is set to two, so that when the ball is in the open state, the fluid in front of the valve can act on the inner wall of the valve body through the two second flow ports, thereby reducing the lateral force generated by the fluid on the ball; when the ball is in the closed state (that is, the first connecting hole is rotated to form a misalignment with the first flow port), under the action of the surrounding cavity, the fluid is divided into two streams, one stream of fluid directly acts on the ball from one of the first flow ports, and the other stream of fluid bypasses the surrounding cavity and reacts to the ball from the other first flow port. The lateral forces of the two streams on the ball are opposite, thereby offsetting each other, reducing the lateral force on the ball, thereby reducing the steering resistance of the valve stem, and improving the operational convenience of the overall structure.

[0009] Optionally, a second flow port is provided on the outer wall of the valve seat, an inlet end of the second flow port is connected to the surrounding cavity, an outlet end of the second flow port is connected to the interior of the valve seat, the second flow port is located at a side edge of the first flow port, and a center line of the second flow port is set at an acute angle to a center line of the first flow port; when the sphere is in a fully open state or a closed state, the outer wall of the sphere is blocked at the outlet end of the second flow port, and when the sphere is in an open state and a center line of the first connecting hole is set at an acute angle to a center line of the first flow port, the outlet end of the second flow port is connected to the first connecting hole.

[0010] By adopting the above technical solution, through the setting of the second flow port, when the ball is in the fully open state or the closed state, the second flow port is in the closed state. When the flow of the fluid needs to be adjusted, the ball is opened, and the rotation angle of the ball is controlled so that the center line of the first connecting hole and the center line of the first flow port form an acute angle (for example, the ball is half-opened). At this time, the first flow port and the second flow port are both connected to the first connecting hole, and the fluid flowing in from the first flow port and the fluid flowing in from the second flow port collide in the first connecting hole, thereby weakening their impact force, reducing the direct impact of the fluid on the inner wall of the first connecting hole when the center line of the first connecting hole and the center line of the first flow port form an acute angle, and causing the ball to have a turning tendency to rotate around the center line of the valve seat, thereby improving the stability of the ball flow regulation.

[0011] Optionally, the second flow port is disposed at one side edge of each of the first flow ports, and a plurality of second flow ports are disposed corresponding to each of the first flow ports, and the plurality of second flow ports are arranged at intervals around the center line of the valve seat.

[0012] By adopting the above-mentioned technical solution and setting a plurality of groups of second flow ports, when the center line of the first connecting hole forms an acute angle with the center line of the first flow port, the fluid enters the first connecting port from the two first flow ports, and the fluids in the two groups of second flow ports can respectively offset the impact force of the fluid entering from their respective corresponding first flow ports, thereby allowing the ball head to maintain a relative position, reducing the impact force of the fluid on the inner wall of the first connecting hole, and thereby reducing the impact force on the valve stem.

[0013] Optionally, a pressure relief channel is provided in the sphere, and the pressure relief channel is arranged in an arc shape around the center line of the valve seat, and openings at both ends of the pressure relief channel are respectively connected to two ends of the first connecting hole.

[0014] By adopting the above-mentioned technical solution and setting the pressure relief flow channel, when the center line of the first connecting hole and the center line of the first flow port form an acute angle, the fluid enters the first connecting hole from the first flow port and impacts the inner wall of the first connecting hole. At this time, part of the fluid can enter the pressure relief flow channel and be re-discharged into the first connecting hole from the other end of the pressure relief flow channel. The fluid re-entering the first connecting hole collides with the fluid in the first connecting hole and then releases pressure, thereby reducing the impact force of the fluid on the inner wall of the first connecting hole.

[0015] Optionally, a movable groove is provided on the inner wall of the first connecting hole, and both ends of the movable groove are extended along the center line of the first connecting hole, and both end openings of the pressure relief channel are connected to the movable groove; an opening and closing component is provided in the movable groove, and when the ball is in a fully open state, the opening and closing component closes the two end openings of the pressure relief channel; when the ball is not in a fully open state, the opening and closing component opens the two end openings of the pressure relief channel.

[0016] By adopting the above-mentioned technical solution and setting the opening and closing component, when the ball is in the fully open state (i.e., the first connecting hole is directly opposite to the first flow port), the opening and closing component closes the openings at both ends of the pressure relief channel, so that the fluid cannot enter the pressure relief channel and directly enters the outlet channel through the second connecting hole; when the ball is not in the fully open state (i.e., the center line of the first connecting hole and the center line of the first flow port form an acute angle or the ball is closed), the opening and closing component opens the pressure relief channel to allow the fluid to pass through, thereby relieving the pressure of the fluid.

[0017] Optionally, the opening and closing assembly includes a moving bar, a guide block and an elastic member, the moving bar is slidably installed in the moving groove, and two connecting grooves are provided on the surface of the moving bar, and the two connecting grooves are respectively arranged corresponding to the openings at both ends of the pressure relief channel; the guide block is arranged at one end of the moving bar, the guide block has a guide surface, and the inner wall of the valve seat is provided with an embedding groove, and the elastic member is arranged between the moving bar and the inner wall of the moving groove, when the ball is in a fully open state, the elastic member forces the guide block to be embedded in the embedding groove, and the two connecting grooves are respectively offset from the openings at both ends of the pressure relief channel; when the ball is not in a fully open state, the guide block disengages from the embedding groove through the guide surface, and the two connecting grooves are respectively connected to the openings at both ends of the pressure relief channel.

[0018] By adopting the above technical solution, through the arrangement of the moving bar, the guide block and the elastic member, when the ball is in the fully open state, the moving bar, under the action of the elastic member, forces the guide block to embed into the embedding groove of the valve seat, forcing the two connecting grooves of the moving bar to be offset with the openings at both ends of the pressure relief channel, thereby closing the pressure relief channel; when the ball is driven to rotate a certain angle to a non-fully open state, the ball drives the moving bar to rotate, and during the rotation process, the guide block disengages from the embedding groove through the guide surface to push the moving bar to move a certain distance, so that the two connecting grooves are respectively connected to the openings at both ends of the pressure relief channel, thereby opening the pressure relief channel, greatly improving the convenience of opening and closing the pressure relief channel.

[0019] Optionally, a mounting frame is provided on the surface of the movable bar close to the first connecting hole, and the mounting frame is provided with a buffer sheet for fluid impact, one side of the buffer sheet is hinged to the mounting frame, and a return spring is provided between the buffer sheet and the mounting frame.

[0020] By adopting the above-mentioned technical solution, through the setting of the buffer plate and the return spring, when the fluid impacts the inner wall of the first connecting hole, it acts on the buffer plate, forcing the buffer plate to rotate and cause the return spring to deform to absorb the impact force of the fluid. The deformation recovery force of the return spring can react to the fluid, thereby weakening the impact force of the fluid on the inner wall of the first connecting hole.

[0021] Optionally, a mounting groove is provided on the surface of the movable bar near the first connecting hole, and one side of the mounting frame is hinged to the inner wall of the mounting groove; the movable bar is provided with a flip assembly, and when the sphere is in a fully open state, the flip assembly forces the free side of the mounting frame to rotate into the mounting groove to accommodate the buffer sheet; when the sphere is not in a fully open state, the flip assembly forces the free side of the mounting frame to rotate out of the mounting groove so that the buffer sheet can be used to provide fluid impact.

[0022] By adopting the above-mentioned technical solution and setting up the flip assembly, in the fully open state, the free side of the mounting frame rotates into the mounting groove, thereby accommodating the buffer sheet and improving the smoothness of fluid flow; when the sphere is not in the fully open state, the flip assembly forces the free side of the mounting frame to rotate out of the mounting groove, so that the buffer sheet is used to supply fluid impact, thereby weakening the impact force of the fluid on the inner wall of the first connecting hole and improving the flexibility of the overall structure.

[0023] Optionally, the flip assembly includes a pushing block, a first sliding block, a second sliding block and a sliding rod, the pushing block is arranged in the mounting groove and is connected and fixed to the inner wall of the movable groove; the pushing block has a pushing surface, the pushing surface is provided with a first sliding groove, the first sliding block is slidably installed in the first sliding groove, the side wall of the mounting frame close to the pushing block is provided with a second sliding groove, and the second sliding block is slidably installed in the second sliding groove; the sliding rod is slidably installed in the mounting groove, one end of the sliding rod is fixedly connected to the first sliding block, and the other end is hinged to the second sliding block, and when the guide block disengages from the embedded groove through the guide surface, the sliding rod forces the free side of the mounting frame to rotate out of the mounting groove.

[0024] By adopting the above-mentioned technical scheme, through the setting of the pushing block, the first sliding block, the second sliding block and the sliding rod, when the ball is switched from the fully open state to the non-fully open state, the ball drives the guide block to disengage from the embedded groove (that is, the moving bar moves) during rotation, and the moving bar drives the sliding rod to move, and under the action of the pushing block and the first sliding block, the sliding rod can push the mounting frame, forcing the free end side of the mounting frame to rotate out of the mounting groove; when the ball is switched from the non-fully open state to the fully open state, the guide block is embedded in the embedded groove, and the moving bar drives the sliding rod to move in the opposite direction, and under the action of the pushing block and the first sliding block, the sliding rod can pull the mounting frame, forcing the free end side of the mounting frame to rotate into the mounting groove, which greatly improves the convenience of storing the buffer sheet and the convenience of operation of the overall structure.

[0025] Optionally, a rotating rod is provided on one side of the mounting frame, the rotating rod is rotatably mounted on the inner wall of the mounting groove, and one side of the mounting frame is hinged to the inner wall of the mounting groove through the rotating rod; one side of the buffer plate is hinged to the free side of the mounting frame, one end of the return spring is connected to the free side of the buffer plate, and the other end is connected to a side of the mounting frame close to the rotating rod.

[0026] By adopting the above technical solution, by hingedly connecting one end of the buffer sheet to the free side of the mounting frame, after the free side of the mounting frame is rotated out of the mounting groove, the surface of the buffer sheet can face the flow direction of the fluid, thereby improving the buffering effect of the buffer sheet.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. Through the arrangement of the surrounding cavity, the first connecting hole and the first flow port, when the ball is in the open state, the fluid flows from the inlet flow channel to the surrounding cavity, and flows from the first flow port into the first connecting hole, and then flows to the outlet flow channel through the second connecting hole; the number of the second flow ports is set to two, so that when the ball is in the open state, the fluid in front of the valve can act on the inner wall of the valve body through the two second flow ports, reducing the lateral force generated by the fluid on the ball; when the ball is in the closed state (that is, the first connecting hole rotates to form a misalignment with the first flow port), under the action of the surrounding cavity, the fluid is divided into two streams, one of which directly acts on the ball from one of the first flow ports, and the other bypasses the surrounding cavity and reacts on the ball from the other first flow port. The lateral forces of the two fluids on the ball are opposite, so they offset each other, reducing the lateral force on the ball, thereby reducing the steering resistance of the valve stem and improving the operational convenience of the overall structure;

[0029] 2. Through the setting of the second flow port, when the ball is in the fully open state or the closed state, the second flow port is in the closed state. When the flow of the fluid needs to be adjusted, the ball is opened and the rotation angle of the ball is controlled so that the center line of the first connecting hole and the center line of the first flow port form an acute angle (for example, the ball is half-open). At this time, the first flow port and the second flow port are both connected to the first connecting hole, and the fluid flowing in from the first flow port and the fluid flowing in from the second flow port collide in the first connecting hole, thereby weakening their impact force and reducing the direct impact of the fluid on the inner wall of the first connecting hole when the center line of the first connecting hole and the center line of the first flow port form an acute angle, which causes the ball to have a turning tendency to rotate around the center line of the valve seat, thereby improving the stability of the ball flow regulation;

[0030] 3. Through the setting of the pushing block, the first sliding block, the second sliding block and the sliding rod, when the ball is switched from the fully open state to the non-fully open state, the ball rotates and drives the guide block to disengage from the embedded groove (that is, the moving bar moves), and the moving bar drives the sliding rod to move. Under the action of the pushing block and the first sliding block, the sliding rod can push the mounting frame, forcing the free end side of the mounting frame to rotate out of the mounting groove; when the ball is switched from the non-fully open state to the fully open state, the guide block is embedded in the embedded groove, and the moving bar drives the sliding rod to move in the opposite direction. Under the action of the pushing block and the first sliding block, the sliding rod can pull the mounting frame, forcing the free end side of the mounting frame to rotate into the mounting groove, which greatly improves the convenience of storing the buffer sheet and the convenience of operation of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a cross-sectional view of the overall structure of Example 1;

[0032] Figure 2 is a partial cross-sectional view of the surrounding cavity embodied in Example 1;

[0033] Figure 3is a partial cross-sectional view of the fully open state of the sphere in Example 2;

[0034] Figure 4 is a partial cross-sectional view of the closed state of the sphere in Example 2;

[0035] Figure 5 is a partial cross-sectional view of embodiment 2 showing that the second flow port is connected to the first communication hole;

[0036] Figure 6 is a partial cross-sectional view of the pressure relief channel of Embodiment 3;

[0037] Figure 7 is a partial cross-sectional view of the guide block disengaging from the embedding groove in embodiment 3;

[0038] Figure 8 is a schematic structural diagram of an opening and closing assembly according to Embodiment 3;

[0039] Fig. 9 yes Figure 6 The enlarged view of point A in the middle;

[0040] Fig.10 is a partial cross-sectional view of a flip assembly according to Embodiment 4;

[0041] Fig.11 yes Fig.10 The enlarged view of point B in the middle;

[0042] Fig.12 It is a schematic diagram of the structure of the buffer sheet according to Example 4.

[0043] Explanation of reference numerals: 1. valve body; 11. flow cavity; 12. inlet flow channel; 13. outlet flow channel; 14. surrounding cavity; 15. valve cover; 2. valve seat; 21. first flow port; 22. second flow port; 23. embedded groove; 3. ball; 31. first connecting hole; 32. second connecting hole; 33. pressure relief flow channel; 34. moving groove; 4. valve stem; 41. hand wheel; 5. opening and closing assembly; 51. moving bar; 511. connecting groove ; 512, mounting groove; 513, sliding bracket; 52, guide block; 521, guide surface; 53, elastic member; 6, mounting frame; 61, buffer plate; 611, hinged rod; 62, return spring; 63, second sliding groove; 64, rotating rod; 7, flip assembly; 71, push block; 711, push surface; 712, first sliding groove; 72, first sliding block; 73, second sliding block; 74, sliding rod; 8, series rod. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1 -Attached Fig.12 This application is described in further detail. Example 1

[0045] The embodiment of the present application discloses a pressure-balanced regulating ball valve.

[0046] Reference Figure 1 , Figure 2 A pressure-balanced regulating ball valve comprises a valve body 1, a valve seat 2, a ball 3 and a valve stem 4. A flow chamber 11, an inlet channel 12 and an outlet channel 13 are respectively provided in the valve body 1. The outlet end of the inlet channel 12 and the inlet end of the outlet channel 13 are both connected to the flow chamber 11. In this embodiment, the inlet channel 12, the outlet channel 13 and the flow chamber 11 are combined to form an S-shaped streamlined flow channel; the valve body 1 is provided with a valve cover 15 for opening and closing the flow chamber 11.

[0047] Reference Figure 1 , Figure 2 The valve seat 2 is installed in the flow cavity 11, and the valve seat 2 is arranged as an annular structure. A surrounding cavity 14 is formed between the outer wall of the valve seat 2 and the inner wall of the flow cavity 11. The surrounding cavity 14 surrounds the outer peripheral side of the valve seat 2, and the outlet end of the inlet flow channel 12 is connected to the surrounding cavity 14; the ball 3 is rotatably installed in the valve seat 2, one end of the valve stem 4 is connected to the ball 3, and the other end passes through the valve cover 15 of the valve body 1 and is connected to a driving member. In this embodiment, the driving member is arranged as a hand wheel 41.

[0048] Reference Figure 1 , Figure 2 The outer wall of the sphere 3 is provided with a first connecting hole 31 penetrating the sphere 3, and the outer wall of the valve seat 2 is provided with a first flow port 21 connected to the inside of the valve seat 2. Two first flow ports 21 are provided and are correspondingly arranged at both ends of the first connecting hole 31. The inlet ends of the two first flow ports 21 are both connected to the surrounding cavity 14; when the sphere 3 is driven to rotate so that the center line of the first connecting hole 31 coincides with the center line of the first connecting hole 31, the sphere 3 is in a fully open state, and when the sphere 3 is driven to rotate so that the center line of the first connecting hole 31 is perpendicular to the center line of the first connecting hole 31, the sphere 3 is in a closed state.

[0049] Reference Figure 1 , Figure 2 A second connecting hole 32 is opened on the outer wall of the sphere 3, and the second connecting hole 32 is connected to the first connecting hole 31. The center line of the second connecting hole 32 is perpendicular to the center line of the second connecting hole 32, and the outlet end of the second connecting hole 32 is connected to the inlet end of the outlet flow channel 13.

[0050] The implementation principle of Example 1 of the present application is as follows: through the setting of the surround cavity 14, after the fluid of the inlet flow channel 12 enters the surround cavity 14, it flows into the first connecting hole 31 of the sphere 3 from the first flow port 21. When the sphere 3 is in a closed state, under the action of the surround cavity 14, the fluid is divided into two streams. One stream of fluid directly acts on the sphere 3 from one of the first flow ports 21, and the other stream of fluid bypasses the surround cavity 14 and reacts to the sphere 3 from the other first flow port 21. The lateral forces of the two streams on the sphere 3 are opposite, thereby offsetting each other, reducing the lateral force on the sphere 3, and thereby reducing the steering resistance of the valve stem 4. Example 2

[0051] The embodiment of the present application discloses a pressure-balanced regulating ball valve.

[0052] Reference Figure 3 , Figure 4 The difference between the pressure-balanced regulating ball valve disclosed in the embodiment of the present application and the embodiment 1 is that:

[0053] In this embodiment, the outer wall of the valve seat 2 is provided with a second flow port 22, and two groups of the second flow ports 22 are arranged. The two groups of second flow ports 22 are arranged corresponding to the two first flow ports 21 of the valve seat 2, and each group of second flow ports 22 is arranged at the edge of the corresponding first flow port 21; the number of each group of second flow ports 22 is provided in plurality, and the plurality of second flow ports 22 are arranged at intervals around the center line of the valve seat 2.

[0054] Reference Figure 3 , Figure 5 The inlet end of the second flow port 22 is connected to the surrounding cavity 14, and the center line of the second flow port 22 is set at an acute angle with the center line of the first flow port 21; when the sphere 3 is in a fully open state or a closed state, the outer wall of the sphere 3 is blocked at the outlet end of the second flow port 22, and when the sphere 3 is in an open state and the center line of the first connecting hole 31 is set at an acute angle with the center line of the first flow port 21, the outlet end of the second flow port 22 is connected to the first connecting hole 31.

[0055] The implementation principle of Example 2 of the present application is: rotate the ball 3 to make the ball 3 turn to a fully open state or a closed state, at which time the outer wall of the ball 3 blocks the second flow port 22 (that is, the second flow port 22 is invalid); when the flow rate of the fluid needs to be adjusted, open the ball 3, and control the rotation angle of the ball 3 so that the center line of the first connecting hole 31 and the center line of the first flow port 21 form an acute angle. At this time, the first flow port 21 and the second flow port 22 are both connected to the first connecting hole 31, and the fluid in the surrounding cavity 14 can flow into the first connecting hole 31 from the first flow port 21 and the second flow port 22. The fluid flowing in from the first flow port 21 and the fluid flowing in from the second flow port 22 collide in the first connecting hole 31, thereby weakening their impact force, reducing the excessive pressure of the fluid, and the fluid directly impacts the inner wall of the first connecting hole 31, which causes the possibility of the ball 3 rotating around the center line of the valve seat 2, thereby improving the stability of the flow regulation of the ball 3. Example 3

[0056] The embodiment of the present application discloses a pressure-balanced regulating ball valve.

[0057] Reference Figure 6 , Figure 7 The difference between the pressure-balanced regulating ball valve disclosed in the embodiment of the present application and the embodiment 1 is that:

[0058] In the present embodiment, a movable groove 34 is provided on the inner wall of the first connecting hole 31, and two movable grooves 34 are provided. The two movable grooves 34 are arranged at intervals around the center line of the first connecting hole 31, and both ends of each movable groove 34 are extended along the center line of the first connecting hole 31; a pressure relief channel 33 is provided in the sphere 3, and the number of the pressure relief channels 33 is arranged corresponding to the number of the movable grooves 34. The pressure relief channel 33 is arranged in an arc shape around the center line of the valve seat 2, and the openings at both ends of the pressure relief channel 33 are connected to the corresponding movable grooves 34 (that is, the pressure relief channel 33 is connected to the two ends of the first connecting hole 31 through the corresponding movable grooves 34).

[0059] Reference Figure 7 , Figure 8 An opening and closing assembly 5 is arranged in the movable groove 34. When the ball 3 is in a fully open state, the opening and closing assembly 5 closes the openings at both ends of the pressure relief channel 33; when the ball 3 is not in a fully open state (i.e., the ball 3 is in a closed state, or the center line of the first connecting hole 31 and the center line of the first flow port 21 are in an acute angle state), the opening and closing assembly 5 opens the openings at both ends of the pressure relief channel 33; the opening and closing assembly 5 includes a movable bar 51, a guide block 52 and an elastic member 53. The movable bar 51 is slidably installed in the movable groove 34. Two connecting grooves 511 are arranged on the surface of the movable bar 51, and the two connecting grooves 511 are respectively arranged corresponding to the openings at both ends of the pressure relief channel 33.

[0060] Reference Figure 7 , Fig. 9The inner wall of the valve seat 2 at the edge of the first flow port 21 is provided with an embedding groove 23, and the guide block 52 is fixedly installed on one end of the moving bar 51 close to the embedding groove 23, and the guide block 52 has a guide surface 521; the elastic member 53 is configured as a compression spring, one end of the compression spring is fixedly connected to the moving bar 51, and the other end is fixedly connected to the inner wall of the moving groove 34. When the ball 3 is in a fully open state, the compression spring forces the guide block 52 to be embedded in the embedding groove 23, and the two connecting grooves 511 are respectively misaligned with the openings at both ends of the pressure relief channel 33; when the ball 3 is not in a fully open state, the guide block 52 is separated from the embedding groove 23 through the guide surface 521, and the two connecting grooves 511 are respectively connected to the openings at both ends of the pressure relief channel 33.

[0061] The implementation principle of Example 3 of the present application is: when the center line of the first connecting hole 31 forms an acute angle with the center line of the first flow port 21, part of the fluid can enter the pressure relief channel 33 and be re-discharged into the first connecting hole 31 from the other end of the pressure relief channel 33. The fluid re-entering the first connecting hole 31 collides with the fluid in the first connecting hole 31 and releases pressure, thereby reducing the impact force of the fluid on the inner wall of the first connecting hole 31.

[0062] When the ball 3 is in the fully open state, the movable bar 51, under the action of the elastic member 53, forces the guide block 52 to embed into the embedding groove 23 of the valve seat 2, forcing the two connecting grooves 511 of the movable bar 51 to be offset with the openings at both ends of the pressure relief channel 33, thereby closing the pressure relief channel 33, so that the fluid entering the first connecting hole 31 directly flows into the outlet channel 13 from the second connecting hole 32; when the ball 3 is driven to rotate a certain angle to a non-fully open state, the ball 3 drives the movable bar 51 to rotate. During the rotation, the guide block 52 disengages from the embedding groove 23 through the guide surface 521 to push the movable bar 51 to move a certain distance, so that the two connecting grooves 511 are respectively connected to the openings at both ends of the pressure relief channel 33, thereby opening the pressure relief channel 33, which greatly improves the convenience of opening and closing the pressure relief channel 33. Example 4

[0063] The embodiment of the present application discloses a pressure-balanced regulating ball valve.

[0064] Reference Fig.10 , Fig.11 The difference between the pressure-balanced regulating ball valve disclosed in the embodiment of the present application and the embodiment 3 is that:

[0065] In this embodiment, a mounting groove 512 is provided on the surface of the movable bar 51 close to the first connecting hole 31. A plurality of mounting grooves 512 are provided and are arranged at intervals along the length direction of the movable bar 51. A mounting frame 6 is provided in each mounting groove 512. A rotating rod 64 is fixedly connected to one side of the mounting frame 6. Both ends of the rotating rod 64 are rotatably installed on the inner wall of the mounting groove 512. One side of the mounting frame 6 is hinged to the inner wall of the mounting groove 512 through the rotating rod 64.

[0066] Reference Fig.11 , Fig.12 The mounting frame 6 is provided with a buffer sheet 61 for fluid impact. For the convenience of description, the side of the mounting frame 6 away from the rotating rod 64 is defined as the free side of the mounting frame 6. A hinge rod 611 is fixedly installed on one side of the buffer sheet 61. Both ends of the hinge rod 611 are rotatably installed on the free side of the mounting frame 6. One side of the buffer sheet 61 is hinged to the free side of the mounting frame 6 through the hinge rod 611. For the convenience of description, the side of the buffer sheet 61 away from the hinge rod 611 is defined as the free side of the buffer sheet 61. A return spring 62 is provided between the buffer sheet 61 and the mounting frame 6. One end of the return spring 62 is fixedly connected to the free side of the buffer sheet 61, and the other end is fixedly connected to the side of the mounting frame 6 close to the rotating rod 64.

[0067] Reference Fig.10 , Fig.11 The movable bar 51 is provided with a flip assembly 7. When the ball 3 is in a fully open state, the flip assembly 7 forces the free side of the mounting frame 6 to rotate into the mounting groove 512 to accommodate the buffer sheet 61. When the ball 3 is not in a fully open state, the flip assembly 7 forces the free side of the mounting frame 6 to rotate out of the mounting groove 512 so that the buffer sheet 61 is used to supply fluid impact.

[0068] In this embodiment, the flip assembly 7 includes a pushing block 71, a first sliding block 72, a second sliding block 73 and a sliding rod 74. The number of the pushing blocks 71 is set corresponding to the number of the mounting grooves 512. Each pushing block 71 is installed in the corresponding mounting groove 512. A series rod 8 is commonly connected between the multiple pushing blocks 71. The series rod 8 is fixedly connected to all the pushing blocks 71. One end of the series rod 8 passes through the moving bar 51 and is fixedly connected to the inner wall of the moving groove 34. All the pushing blocks 71 are fixedly installed on the inner wall of the moving groove 34 through the series rod 8.

[0069] Reference Fig.11 , Fig.12The push block 71 has a push surface 711, and the push surface 711 is provided with a first sliding groove 712. The first sliding block 72 is slidably installed in the first sliding groove 712. The side wall of the mounting frame 6 close to the push block 71 is provided with a second sliding groove 63, and the second sliding block 73 is slidably installed in the second sliding groove 63; a sliding bracket 513 is fixedly installed in the mounting groove 512, and a sliding rod 74 is slidably installed in the sliding bracket 513. One end of the sliding rod 74 is fixedly connected to the first sliding block 72, and the other end is fixedly connected to the first sliding block 72. The end is hinged to the second sliding block 73; when the guide block 52 of the moving bar 51 is embedded in the embedding groove 23 (that is, the ball 3 is fully opened), the sliding rod 74 pulls the mounting frame 6 and forces the mounting frame 6 to be accommodated in the mounting groove 512; when the guide block 52 of the moving bar 51 is disengaged from the embedding groove 23 (that is, the ball 3 is not fully opened), the sliding rod 74 pushes the mounting frame 6 and forces the free side of the mounting frame 6 to rotate out of the mounting groove 512, driving the buffer sheet 61 to rotate out of the mounting groove 512 for fluid impact.

[0070] The implementation principle of Example 4 of the present application is as follows: when the ball 3 is not in a fully open state, the flip assembly 7 forces the free side of the mounting frame 6 to rotate out of the mounting groove 512, so that the buffer sheet 61 is used to provide fluid impact, thereby weakening the impact force of the fluid on the inner wall of the first connecting hole 31, and reducing the possibility of the ball 3 rotating freely under the impact of the fluid; when the ball 3 is in a fully open state, the free side of the mounting frame 6 rotates into the mounting groove 512, thereby accommodating the buffer sheet 61, improving the smoothness of the fluid flow and improving the flexibility of the overall structure.

[0071] The above are 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 pressure balanced regulating ball valve, characterized in that: The invention comprises a valve body (1), a valve seat (2), a ball (3) and a valve stem (4); the valve body (1) is provided with a flow chamber (11), an inlet flow channel (12) and an outlet flow channel (13), the inlet flow channel (12) and the outlet flow channel (13) are both connected to the flow chamber (11); the inlet flow channel (12), the outlet flow channel (13) and the flow chamber (11) are combined to form an S-shaped streamlined flow channel; the valve seat (2) is arranged in the flow chamber (11); the ball (3) is rotatably mounted on the valve seat (2) The valve stem (4) is connected to the ball (3) at one end, and passes through the valve body (1) at the other end and is connected to a driving member; the outer wall of the ball (3) is provided with a first connecting hole (31) penetrating the ball (3); the outer wall of the valve seat (2) is provided with a first flow port (21) connected to the inside of the valve seat (2); the first flow port (21) is provided with two and is arranged corresponding to the two ends of the first connecting hole (31); a surrounding cavity (14) surrounding the valve seat (2) is formed between the outer wall of the valve seat (2) and the inner wall of the flow cavity (11) The inlet flow channel (12) and the two first flow ports (21) are both connected to the surrounding cavity (14); the outer wall of the spherical body (3) is provided with a second communication hole (32) connected to the first communication hole (31); the outlet end of the second communication hole (32) is connected to the outlet flow channel (13); the outer wall of the valve seat (2) is provided with a second flow port (22); the inlet end of the second flow port (22) is connected to the surrounding cavity (14); the outlet end of the second flow port (22) is connected to the inside of the valve seat (2); the second flow port (22) is located at a side edge of the first flow port (21), and the center line of the second flow port (22) is set at an acute angle with the center line of the first flow port (21); when the sphere (3) is in a fully open state or a closed state, the outer wall of the sphere (3) is blocked at the outlet end of the second flow port (22); when the sphere (3) is in an open state and the center line of the first connecting hole (31) is set at an acute angle with the center line of the first flow port (21), the outlet end of the second flow port (22) is connected to the first connecting hole (31).

2. A pressure-balanced regulating ball valve according to claim 1, characterized in that: The second flow port (22) is arranged at one side edge of each of the first flow ports (21), and a plurality of second flow ports (22) are arranged corresponding to each of the first flow ports (21), and the plurality of second flow ports (22) are arranged at intervals around the center line of the valve seat (2).

3. A pressure-balanced regulating ball valve according to claim 1, characterized in that: A pressure relief channel (33) is provided in the spherical body (3), and the pressure relief channel (33) is arranged in an arc shape around the center line of the valve seat (2), and the openings at both ends of the pressure relief channel (33) are respectively connected to the two ends of the first connecting hole (31).

4. A pressure-balanced regulating ball valve according to claim 3, characterized in that: The inner wall of the first connecting hole (31) is provided with a movable groove (34), the two ends of the movable groove (34) are extended along the center line of the first connecting hole (31), and the two end openings of the pressure relief channel (33) are both connected to the movable groove (34); an opening and closing component (5) is provided in the movable groove (34), and when the ball (3) is in a fully open state, the opening and closing component (5) closes the two end openings of the pressure relief channel (33); when the ball (3) is not in a fully open state, the opening and closing component (5) opens the two end openings of the pressure relief channel (33).

5. A pressure-balanced regulating ball valve according to claim 4, characterized in that: The opening and closing assembly (5) comprises a moving bar (51), a guide block (52) and an elastic member (53); the moving bar (51) is slidably mounted on the moving groove (34); two connecting grooves (511) are provided on the surface of the moving bar (51); the two connecting grooves (511) are respectively arranged corresponding to the openings at both ends of the pressure relief channel (33); the guide block (52) is arranged at one end of the moving bar (51); the guide block (52) has a guide surface (521); the inner wall of the valve seat (2) is provided with an embedding groove (23); The elastic member (53) is arranged between the moving bar (51) and the inner wall of the moving groove (34); when the ball (3) is in a fully open state, the elastic member (53) forces the guide block (52) to be embedded in the embedding groove (23), and the two connecting grooves (511) are respectively misaligned with the openings at both ends of the pressure relief channel (33); when the ball (3) is not in a fully open state, the guide block (52) is separated from the embedding groove (23) through the guide surface (521), and the two connecting grooves (511) are respectively connected to the openings at both ends of the pressure relief channel (33).

6. A pressure-balanced regulating ball valve according to claim 5, characterized in that: A mounting frame (6) is provided on the surface of the moving strip (51) close to the first connecting hole (31), and the mounting frame (6) is provided with a buffer sheet (61) for fluid impact, one side of the buffer sheet (61) is hinged to the mounting frame (6), and a return spring (62) is provided between the buffer sheet (61) and the mounting frame (6).

7. A pressure-balanced regulating ball valve according to claim 6, characterized in that: The movable bar (51) is provided with a mounting groove (512) on its surface close to the first connecting hole (31), and one side of the mounting frame (6) is hinged to the inner wall of the mounting groove (512); the movable bar (51) is provided with a flip assembly (7), and when the sphere (3) is in a fully open state, the flip assembly (7) forces the free side of the mounting frame (6) to rotate into the mounting groove (512) so as to accommodate the buffer sheet (61); when the sphere (3) is not in a fully open state, the flip assembly (7) forces the free side of the mounting frame (6) to rotate out of the mounting groove (512) so that the buffer sheet (61) is used to provide fluid impact.

8. A pressure-balanced regulating ball valve according to claim 7, characterized in that: The flip assembly (7) comprises a push block (71), a first sliding block (72), a second sliding block (73) and a sliding rod (74); the push block (71) is arranged in the mounting groove (512) and is connected and fixed to the inner wall of the movable groove (34); the push block (71) has a push surface (711), the push surface (711) is provided with a first sliding groove (712), the first sliding block (72) is slidably mounted in the first sliding groove (712), and the mounting frame (6) is close to the push block (71 ) is provided with a second sliding groove (63) on the side wall, and the second sliding block (73) is slidably installed in the second sliding groove (63); the sliding rod (74) is slidably installed in the installation groove (512), one end of the sliding rod (74) is fixedly connected to the first sliding block (72), and the other end is hinged to the second sliding block (73), when the guide block (52) is separated from the embedded groove (23) through the guide surface (521), the sliding rod (74) forces the free side of the mounting frame (6) to rotate out of the mounting groove (512).

9. The pressure-balanced regulating ball valve according to claim 7, characterized in that: A rotating rod (64) is provided on one side of the mounting frame (6), and the rotating rod (64) is rotatably mounted on the inner wall of the mounting groove (512). One side of the mounting frame (6) is hinged to the inner wall of the mounting groove (512) through the rotating rod (64); one side of the buffer sheet (61) is hinged to the free side of the mounting frame (6), and one end of the return spring (62) is connected to the free side of the buffer sheet (61), and the other end is connected to a side of the mounting frame (6) close to the rotating rod (64).

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