A ball valve regulator

Abstract

The application discloses a ball valve regulating valve, which comprises a left valve body and a right valve body, the left valve body is screwed on the right valve body, the rightmost end of the left valve body is fixedly connected with a valve seat, the opening structure in the valve seat comprises a plurality of round holes arranged on the valve seat and a horn-shaped opening arranged on the valve seat, the rightmost end of the valve seat is provided with a sealing ring, a hole plate is arranged at the left end in the right valve body, a valve cavity penetrating from top to bottom is arranged between the left valve body and the right valve body, a penetrating hole at the upper end of the valve cavity is inserted into a cover, a ball is arranged in the valve cavity, a valve rod is rotatably connected in the cover, the upper end of the valve rod is connected with an electric actuator, the lower end of the valve rod extends into the valve cavity and is fixedly arranged at the upper end of the ball, the lower end of the right valve body is screwed with a lower cover, and the lower cover is connected with the lower end of the ball through the right valve body. The application can make the flow characteristics of the valve linear, reduce noise and vibration, prevent cavitation, and has stable regulating performance, accurate regulation, small volume, light weight and the ability to meet the working condition requirements of the pipeline system of a new type of warship.

Description

TECHNICAL FIELD

[0001] The present application relates to the linear flow characteristic structure design field of ball valve regulating valve, more particularly to a ball valve regulating valve. BACKGROUND

[0002] The linear flow characteristic of ball valve regulating valve refers to the linear relationship between the flow size of ball valve and the opening of ball body, and the flow characteristic of ordinary ball valve is nonlinear, if used as a regulating valve, the flow of ball valve at different openings needs to be changed through valve seat structure, so as to realize the linear flow characteristic of ball valve regulating valve.

[0003] With the development of naval equipment technology in China, the requirements of warships on valve performance are increasingly improved, and there are high requirements on valve performance, weight, vibration and noise. The ball valve regulating valve needs to have stable sealing performance, accurate linear flow characteristic function, and meet the linearity requirements of GB / T10869-2008 and GB / T4213-2008 regulating characteristics. If the original theoretical calculation is simply used, the calculation error requirements cannot be met, so the flow at different openings of the valve is calculated by simulation software, and then the valve structure is optimized to improve the linear flow characteristic of the ball valve regulating valve. SUMMARY

[0004] The present application provides a ball valve regulating valve with stable regulating performance, accurate regulation, small volume and weight, and high working efficiency.

[0005] In order to achieve the above purpose, the present application provides a ball valve regulating valve, which comprises a left valve body and a right valve body, the left valve body is screwed on the right valve body, and the rightmost end in the left valve body is connected with a valve seat through an internal hexagonal set screw.

[0006] The valve seat is provided with an opening structure, which comprises a plurality of circular holes arranged on the valve seat and a horn-shaped opening arranged on the valve seat.

[0007] The design steps of the circular holes and the horn-shaped opening of the opening structure in the valve seat are as follows:

[0008] Step 1, determine the total area of the opening structure in the valve seat, the total area is preliminarily determined by substituting the following formula, wherein the maximum flow refers to the maximum flow of the valve when fully opened after setting the valve seat, and the maximum flow is given by the technical requirements.

[0009]

[0010] Wherein Q is the maximum flow of the valve when fully opened after setting the valve seat, unit m³ / h;

[0011] A is the total cross-sectional area of the opening structure, unit cm 2 ;

[0012] is a flow resistance coefficient, designed for a given;

[0013] is a differential pressure, unit kgf / cm 2 ;

[0014] is a density, unit g / cm 3 ;

[0015] Step 2, the opening structure in the valve seat is designed as a similar trapezoid, the angle between the inclined edge of the similar trapezoid and the horizontal direction is less than 15°, the two inclined edges of the similar trapezoid are symmetrically arranged along the center line of the valve seat, and the area of the similar trapezoid is the same as the total area A.

[0016] Step 3, the boundary circle on the center line of the valve seat is equally divided into ten segments, so that the similar trapezoid is divided into ten parts from the "small base" to the "large base".

[0017] Step 4, the circular holes are arranged on the "small base" side of the similar trapezoid, the total cross-sectional area of the circular holes is the area of the similar trapezoid close to the small base, and the cross-sectional diameter of each circular hole is 2-3mm.

[0018] Step 5, a horn-shaped opening is arranged on the side opposite to the circular hole, and the cross-sectional area of the horn-shaped opening is the area of the similar trapezoid close to the large base.

[0019] Step 6, the Fluent software is used for valve flow simulation calculation, the created three-dimensional model is imported into the Geometry of the Fluent software to generate a fluid domain, then network division is carried out, calculation setting is carried out, the valve model is simulated through the Fluent software to obtain the corresponding linear flow law, the flow at different openings of the valve is counted, the flow characteristics are analyzed, the shape of the inclined edge of the horn-shaped opening is adjusted according to the standard linear flow law, and the area of the cross section of the horn-shaped opening, the number and arrangement of the circular holes are changed, so that the valve meets the standard linear flow law.

[0020] The rightmost end of the valve seat is provided with a sealing ring, and the left end in the right valve body is provided with a detachable hole plate. The hole plate is a convex circular truncated cone structure, and a plurality of through holes are arranged on the hole plate.

[0021] The left valve body and the right valve body are provided with a valve cavity penetrating up and down, the penetrating hole at the upper end of the valve cavity is inserted and mounted with an upper cover, a ball is arranged in the valve cavity, the leftmost end of the ball abuts against the sealing ring, a valve rod is rotationally connected in the upper cover, the upper end of the valve rod is connected with an electric actuator, the lower end of the valve rod extends into the valve cavity and is fixedly installed at the upper end of the ball, and a lower cover is screwed at the lower end of the right valve body. The lower cover is connected to the lower end of the ball through the right valve body.

[0022] The ball valve regulating valve, preferably, a spring is arranged between the two vertical surfaces of the valve seat and the left valve body, one end of the spring is arranged on the vertical contact surface of the valve body, and the other end of the spring is inserted into the recess hole arranged on the vertical contact surface of the valve seat.

[0023] The ball valve regulating valve, preferably, an O-shaped ring is arranged between the two horizontal surfaces of the valve seat and the left valve body, and the O-shaped ring is sleeved on the valve seat.

[0024] The ball valve regulating valve, preferably, a support shaft is arranged on the upper end of the lower cover, the support shaft on the lower cover is connected to the lower end of the ball, and the support shaft on the lower cover is sleeved with an O-shaped ring on the outer surface in contact with the right valve body.

[0025] The ball valve regulating valve, preferably, a gap is arranged between the upper cover and the valve rod, a packing is arranged in the gap, a packing gland is arranged on the packing, and the packing gland is screwed on the upper cover.

[0026] The ball valve regulating valve, preferably, a bracket is screwed below the electric actuator, the bracket is sleeved on the valve rod, and the bracket is screwed on the top end of the right valve body.

[0027] The ball valve regulating valve, preferably, an indicator is arranged on the lower plane of the upper end of the bracket, and the indicator is sleeved on the valve rod.

[0028] The ball valve regulating valve, preferably, a metal winding gasket is arranged at the connection between the left valve body and the right valve body.

[0029] The ball valve regulating valve, preferably, the calculation setting in step 6 includes physical model setting, near-wall function setting, material property setting, boundary condition setting, initial condition setting and solution setting, the physical model setting selects a turbulence model, the turbulence model selects a standard type, the near-wall function setting selects a wall function method, the material property setting includes material medium setting and material type setting, the material medium setting selects liquid water, the material type setting selects a fluid type, and the pressure difference between the inlet and the outlet is ensured to be 100 kPa.

[0030] The ball valve regulating valve has the advantages that the flow characteristics of the ball valve regulating valve are linear, the hole opening of the valve seat can reduce the noise and vibration generated by the ball valve regulating valve at 10% opening to a nearly closed state, and can prevent cavitation of the liquid, a detachable orifice plate is designed at the outlet end of the valve, further plays a turbulent flow role, realizes the vibration reduction and noise reduction functions of the regulating valve, and the ball valve regulating valve has stable regulating performance, accurate regulation, small volume, light weight and the like, and can meet the working condition requirements of a new type of ship pipeline system. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the application.

[0032] Figure 2 This is a schematic diagram of the valve seat structure.

[0033] Figure 3 This is a schematic diagram of the valve seat structure AA cross-section.

[0034] Figure 4 This is a schematic diagram of the initial structure of the valve seat opening in step 2.

[0035] Figure 5 This is a schematic diagram of dividing the initial shape of the valve's internal opening structure into ten parts in step 3.

[0036] Figure 6 This is a schematic diagram of a three-dimensional model of the valve seat.

[0037] Figure 7 This is a schematic diagram of the software interface for setting turbulence model parameters in Fluent software for 3D models.

[0038] Figure 8 This is a schematic diagram of the software interface for setting materials in a 3D model in Fluent software.

[0039] Figure 9 This is a schematic diagram of the software interface settings for solving 3D models in Fluent software.

[0040] In the diagram: 1. Right valve body, 2. Orifice plate, 3. Ball, 4. Valve stem, 5. Top cover, 6. Packing, 7. Packing gland, 8. Bracket, 9. Electric actuator, 10. Indicator, 11. Spiral wound metal gasket, 12. Socket head cap screw, 13. Spring, 14. Left valve body, 15. Valve seat, 16. Sealing ring, 17. O-ring, 18. Bottom cover. Detailed Implementation

[0041] like Figure 1 As shown, the present invention provides a ball valve regulating valve, comprising a left valve body 14 and a right valve body 1. The left valve body 14 is screwed onto the right valve body 1, and the rightmost end of the left valve body 14 is fixedly connected to a valve seat 15 by an internal hexagon set screw 12.

[0042] like Figures 2-5 As shown, the valve seat 15 is provided with an opening structure, which includes a plurality of round holes and a flared opening on the valve seat 15.

[0043] The design steps for the circular hole and the flared opening in the inner opening structure of valve seat 15 are as follows:

[0044] Step 1: Determine the total cross-sectional area of ​​the opening structure inside the valve seat 15. The total area is initially determined by the maximum flow rate and by substituting it into the following formula, where the maximum flow rate refers to the maximum flow rate when the valve is fully open after the valve seat 15 is installed. The maximum flow rate is given by the technical requirements.

[0045] (derived by Bernoulli equation)

[0046] Q is the maximum flow of the valve when fully open after setting the valve seat 15, unit m³ / h;

[0047] A is the total cross-sectional area of the opening structure, unit cm 2 ;

[0048] is the flow resistance coefficient, designed to be given;

[0049] is the pressure difference, unit kgf / cm 2 ;

[0050] is the density, unit g / cm 3 ;

[0051] Step 2, the opening structure in the valve seat 15 is designed as a similar trapezoid, the angle between the similar trapezoid and the horizontal direction is less than 15°, the two similar trapezoid are symmetrically arranged along the center line of the valve seat 15, and the area of the similar trapezoid is the same as the total cross-sectional area A of the opening structure in step 1.

[0052] Step 3, the boundary circle diameter on the center line of the valve seat 15 is equally divided into ten segments, so that the similar trapezoid is divided into ten parts from the "small base" to the "large base".

[0053] Step 4, the circular holes are arranged on the "small base" side of the similar trapezoid, the total cross-sectional area of the circular holes is the area of the similar trapezoid close to the "small base", and the cross-sectional diameter of each circular hole is in the range of 2-3mm.

[0054] Step 5, a horn-shaped opening is arranged on the side opposite to the circular hole, and the cross-sectional area of the horn-shaped opening is the area of the similar trapezoid close to the "large base".

[0055] Step 6, the valve flow is simulated and calculated by using Fluent, the created three-dimensional model is imported into the Geometry of Fluent to generate a fluid domain, then network division is carried out, and calculation setting is carried out, the valve model is simulated by Fluent software to obtain the corresponding linear flow law, then the flow at different opening degrees of the valve is counted, the flow characteristics are analyzed, the shape of the horn-shaped opening is adjusted according to the standard linear flow law, and the cross-sectional area of the horn-shaped opening, the number and arrangement of the circular holes are changed, so that the valve meets the standard linear flow law.

[0056] As Figures 1-3As shown, a sealing ring 16 is provided at the rightmost end of the valve seat 15, and a detachable orifice plate 2 is installed at the left end inside the right valve body 1. The orifice plate 2 is a raised frustum-shaped structure with multiple through holes.

[0057] A valve cavity is provided between the left valve body 14 and the right valve body 1, which runs vertically through each other. The upper cover 5 is inserted into the through hole at the upper end of the valve cavity. A ball 3 is provided inside the valve cavity. The leftmost end of the ball 3 abuts against the sealing ring 16. The valve stem 4 is rotatably connected inside the upper cover 5. The upper end of the valve stem 4 is connected to the electric actuator 9. The lower end of the valve stem 4 extends into the valve cavity and is fixedly installed on the upper end of the ball 3. The lower cover 18 is screwed to the lower end of the right valve body 1. The lower cover 18 passes through the right valve body 1 and is connected to the lower end of the ball 3.

[0058] A spring 13 is provided between the two vertical surfaces of the valve seat 15 and the left valve body 14. One end of the spring 13 is installed on the vertical direct contact surface of the valve body 14, and the other end of the spring 13 is inserted into a recessed hole installed on the vertical direct contact surface of the valve seat 15.

[0059] An O-ring 17 is provided between the two horizontal surfaces of the valve seat 15 and the left valve body 14, and the O-ring 17 is fitted onto the valve seat 15.

[0060] The upper end of the lower cover 18 is provided with a support shaft, which is connected to the lower end of the ball 3. An O-ring 17 is fitted on the outer surface of the support shaft on the lower cover 18 that contacts the right valve body 1.

[0061] There is a gap between the upper cover 5 and the valve stem 4, and a packing 6 is provided in the gap. A packing gland 7 is provided on the packing 6 and is screwed onto the upper cover 5.

[0062] The electric actuator 9 is screwed to the bottom of the bracket 8, which is sleeved on the valve stem 4 and screwed to the top of the right valve body 1.

[0063] An indicator 10 is provided on the lower surface of the upper end of the bracket 8, and the indicator 10 is sleeved on the valve stem.

[0064] A metal spiral wound gasket 11 is provided at the connection between the left valve body 14 and the right valve body 1.

[0065] like Figures 7-9 As shown, the calculation settings in step 6 include physical model settings, near-wall function settings, material property settings, boundary condition settings, initial condition settings, and solution settings. The physical model setting selects the turbulence model, the turbulence model selects the standard type, the near-wall function setting selects the wall function method, and the material property settings include material medium settings and material type settings. The material medium setting selects liquid water, the material type setting selects fluid type, and the inlet and outlet pressure difference is guaranteed to be 100 kPa.

[0066] like Figure 1As shown, the valve seat 15 is fixedly installed on the left valve body 14 by the inner hexagonal set screw 12, when the valve is opened or closed, the multi-rotation electric actuator 9 drives the valve stem 4 to rotate, the valve stem 4 drives the ball 3 to rotate to different openings, the medium flows from left to right, and flows out from the left valve body 14, the valve seat 15, the ball 3, the orifice plate 2 to the right valve body 1 in sequence, and the left valve body 14, the metal winding gasket 11 and the right valve body 1 are sealed by the fastener; the packing gland 7 compresses the packing 6 to form a packing seal with the valve stem 4 and the upper cover 5; at the same time, the "O" ring 17 is tightly clamped with the lower cover 18 to be installed on the right valve body 1 to form a seal, and the three seals prevent the ball valve regulating valve from leaking.

[0067] The application controls the linear adjustment of the valve by controlling the area of the flow channel, and the sealing pair adopts soft sealing, hydrogenated nitrile rubber, has the use effects of anti-erosion and long service life.

[0068] As Figure 2 shown, the ball valve regulating valve adopts a single valve seat fixed ball valve structure, the single valve seat can make the ball 3 have smaller friction when rotating; the valve flow is calculated by using the simulation software Fluent, and the linear flow characteristic is obtained.

[0069] The linear flow characteristic of the ball valve regulating valve refers to that the flow coefficient of the ball valve is linearly related to the opening of the ball, the flow characteristic of the ordinary ball valve is nonlinear, if used as a regulating valve, the flow of the ball valve at different openings needs to be changed through the valve seat structure, so that the linear flow characteristic of the ball valve regulating valve is realized, and the ideal linear relationship is proportional to the function (y=k·x, k≠0) in mathematics, that is, the flow coefficient K v is proportional to the opening θ of the ball, and the formula is K v =k·θ (k>0), but according to the standard GB / T4213-2008 (more strict than GB / T10869-2008), the slope deviation of the linear flow characteristic meets the following requirements, that is, between the relative strokes h=0.1-0.9, the difference between any two adjacent flow coefficient measurement values and the measured rated flow coefficient should meet the provisions of Table 1.

[0070]

[0071] Table 1

[0072] As Figure 2As shown, according to its linear flow characteristics, the throttle hole shape of the valve seat 15 is a combination of an approximate horn shape and multiple small holes; when the ball valve regulating valve is opened, the flow area from the small hole side of the valve seat 15 to the approximate horn side should gradually increase from closed (0° opening) to fully open (90° opening); when the ball valve regulating valve is closed, the flow area from the approximate trapezoidal side of the valve seat to the small hole side should gradually decrease from fully open (90° opening) to closed (0° opening). This can make the opening and closing flow characteristics linear. When the medium flows through the orifice plate 2, the orifice plate has many small holes, which further play a turbulent role, achieving the vibration and noise reduction function of the regulating valve.

[0073] The opening structure position is axially symmetrically distributed on the center line of the valve seat 15, with the cross-sectional circle of the ball 3 passage as the boundary. The total area A of the opening structure is preliminarily determined by the maximum flow Q and by substituting the following formula, wherein the maximum flow Q (given by the technical requirements) refers to the maximum flow of the valve when fully open after the valve seat 15 is set.

[0074] (The formula is derived from Bernoulli's equation)

[0075] Where Q is the flow rate, in m³ / h;

[0076] A is the area, in cm 2 ;

[0077] is the flow resistance coefficient, which is given by design;

[0078] is the pressure difference, in kgf / cm 2 ;

[0079] is the density, in g / cm 3 .

[0080] As Figure 4 shown, the shape sketch is similar to a trapezoid, with an angle between the inclined side and the horizontal direction not exceeding 15°, and the area size is the total area A calculated by the above formula.

[0081] As Figure 5 shown, the boundary circle on the center line is equally divided into ten segments, and the similar trapezoid is divided into ten parts from the "small base" to the "large base" direction.

[0082] As Figure 2As shown, multiple circular holes are located on one side of the small base edge, with an area similar to a trapezoid near the small base edge. The diameter of each hole is approximately φ2mm to φ3mm, and the holes are arranged as compactly as possible. Fluent was used to simulate and calculate the valve flow rate, ensuring a pressure difference of 100kPa between the inlet and outlet. To obtain a linear flow rate conforming to the standard, the opening area was changed by adjusting the shape of the hypotenuse, thus optimizing the shape to have multiple circular holes on the left and a flared opening on the right.

[0083] The flow simulation calculation of valves was performed using Fluent software. The calculation process of Fluent software is roughly as follows: the created 3D model is imported into Fluent Geometry to generate the fluid domain, then the network is divided, and then the calculation settings are set, which mainly include physical model setting, material property setting, boundary condition setting, initial condition setting and solution setting, etc. Finally, the calculation results are post-processed.

[0084] like Figure 7 As shown, the physical model selected is the turbulence model.

[0085] like Figure 8 As shown, liquid water is selected as the medium material, and the pressure difference between the inlet and outlet is guaranteed to be 100 kPa.

[0086] like Figure 9 As shown, the three-dimensional model of the valve is set up for solving, initialized, and the flow rate is calculated.

[0087] By statistically analyzing the flow rate under different opening degrees, and to obtain a linear flow rate law that conforms to the standard, the opening area was changed by adjusting the shape of the through hole, and the flow rate was calculated multiple times to optimize the opening shape to have multiple round holes on the left and a trumpet-shaped opening on the right.

[0088] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A ball valve regulator valve comprising a left valve body (14) and a right valve body (1), characterized in that, The left valve body (14) is fixed on the right valve body (1) by bolts, and the rightmost end in the left valve body (14) is connected with the valve seat (15) by an internal hexagonal set screw (12); The valve seat (15) is provided with an opening structure, which includes a plurality of round holes provided on the valve seat (15) and a horn-shaped opening provided on the valve seat (15); The design steps of the round holes and the horn-shaped opening of the opening structure in the valve seat (15) are as follows: Step 1, determine the total area of the cross section of the opening structure in the valve seat (15), which is preliminarily determined by substituting the maximum flow into the following formula, wherein the maximum flow refers to the maximum flow of the valve when the valve is fully opened after the valve seat (15) is set, and the maximum flow is given by the technical requirements; ； Wherein Q is the maximum flow of the valve when the valve is fully opened after the valve seat (15) is set, unit m³ / h; A is the total area of the open structure cross section in cm2 2 ; wherein C is the flow resistance coefficient, designed given; for differential pressure, unit kgf / cm 2 ; Density, in g / cm3 3 ; Step 2, design the embryonic form of the opening structure in the valve seat (15) as a similar trapezoid, the angle between the hypotenuse of the similar trapezoid and the horizontal direction is less than 15°, the two hypotenuses of the similar trapezoid are symmetrically arranged along the center line of the valve seat (15), and the area of the similar trapezoid is the same as the total area A of the cross section of the opening structure in step 1; Step 3, divide the diameter of the boundary circle on the center line of the valve seat (15) into ten segments, thereby dividing the similar trapezoid from the "small base" to the "large base" direction into ten parts; Step 4, the round holes are arranged on the "small base" side of the similar trapezoid, and the total area of the cross sections of the plurality of round holes is the area of the similar trapezoid close to the small base, and the cross section diameter of each round hole is in the range of 2-3mm; Step 5, the horn-shaped opening is arranged on the side opposite to the round holes, and the area of the horn-shaped opening is the area of the similar trapezoid close to the large base; Step 6, use Fluent to simulate and calculate the flow of the valve, import the created three-dimensional model into the Geometry of Fluent software to generate a fluid domain, then divide the network, and then set the calculation, simulate the valve model by Fluent software to obtain the corresponding linear flow law, then analyze the flow characteristics by counting the flow under different opening degrees of the valve, and adjust the shape of the hypotenuse of the horn-shaped opening according to the standard linear flow law to change the area of the horn-shaped opening, the number and arrangement of the round holes, so that the valve meets the standard linear flow law; The rightmost end of the valve seat (15) is provided with a sealing ring (16), the left end in the right valve body (1) is provided with a detachable hole plate (2), the hole plate (2) is a convex circular truncated cone structure, and the hole plate (2) is provided with a plurality of through holes; The left valve body (14) and the right valve body (1) are provided with a valve cavity penetrating up and down, the penetrating hole at the upper end of the valve cavity is provided with an upper cover (5), the valve cavity is provided with a ball (3), the leftmost end of the ball (3) abuts against the sealing ring (16), the upper cover (5) is rotatably connected with a valve rod (4), the upper end of the valve rod (4) is connected with an electric actuator (9), the lower end of the valve rod (4) extends into the valve cavity and is fixed at the upper end of the ball (3), the lower end of the right valve body (1) is screwed with a lower cover (18), the upper part of the lower cover is provided with a connecting shaft, the connecting shaft passes through the right valve body (1) and is movably connected with the lower end of the ball (3).

2. The ball valve regulator valve of claim 1, wherein, The two vertical surfaces of the valve seat (15) in contact with the left valve body (14) are provided with a spring (13), one end of the spring (13) is in contact with the vertical surface of the left valve body (14), and the other end of the spring (13) is inserted into the recess hole provided on the vertical surface of the valve seat (15).

3. The ball valve regulator valve of claim 1, wherein, The two horizontal surfaces of the valve seat (15) in contact with the left valve body (14) are provided with an "O" ring (17), the "O" ring (17) is sleeved on the valve seat (15).

4. The ball valve regulator valve of claim 3, wherein, The support shaft on the lower cover (18) is sleeved with the "O" ring (17) on the outer surface in contact with the right valve body (1).

5. The ball valve regulator valve of claim 1, wherein, The gap between the upper cover (5) and the valve rod (4) is provided with a packing (6), the packing (6) is provided with a packing gland (7), and the packing gland (7) is screwed on the upper cover (5).

6. The ball valve regulator valve of claim 1, wherein, The lower end of the support (8) is screwed on the top end of the right valve body (1).

7. The ball valve regulator valve of claim 6, wherein, The lower plane of the upper end of the support (8) is provided with an indicator (10), and the indicator (10) is sleeved on the valve rod.

8. The ball valve regulator valve of claim 1, wherein, The left valve body (14) and the right valve body (1) are provided with a metal winding gasket (11).

9. The ball valve regulator valve of claim 1, wherein, The calculation settings in step 6 include physical model setting, near wall function setting, material property setting, boundary condition setting, initial condition setting and solution setting, the physical model setting selects a turbulence model, the turbulence model selects a standard type, the near wall function setting selects a wall function method, the material property setting includes material medium setting and material type setting, the material medium setting selects liquid water, the material type setting selects a fluid type, and the pressure difference between the inlet and the outlet is ensured to be 100kPa.

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