Flow adjusting ball valve

Abstract

The utility model relates to the technical field of ball valves, and discloses a flow adjusting ball valve which comprises a valve body base, a ball body installed in the valve body base and a valve rod used for being connected with the ball body in a sealed mode, the cross section of a channel where a medium of the ball body passes is a quadrangle, the two sides of the quadrangle in the horizontal direction are of arc-shaped structures, and the arc openings face oppositely. And the upper and lower edges of the quadrangle are linear sections and are arranged in parallel. According to the invention, good adjustment linearity and adjustment proportion can be realized.

Description

Technical Field

[0001] This application relates to the technical field of ball valves, especially flow control ball valves. Background Art

[0002] Referring to Figure 1 , for the flow control of existing residential heating metering pipelines, most of them use traditional ball valves with circular bores, or V-type ball valves, W-type ball valves.

[0003] When adjusting the flow rate, for each adjustment gear angle of valve rotation (for example, each adjustment gear is set to rotate 5 degrees as an adjustment gear angle), due to the shape of the cross-section of the valve water flow channel, for each rotation of 5 degrees, the proportion of the cross-section adjustment change of the water flow channel is inconsistent. Therefore, when adjusting the flow rate, the adjustment accuracy is not high, and it needs to be adjusted repeatedly to reach the predetermined value, which is very troublesome; similarly, the same is true for the large-diameter flow control valves used in the adjustment of the balance of the community heating pipe network. Utility Model Content

[0004] In order to improve the accuracy of valve flow control, this application provides a flow control ball valve.

[0005] This application provides a flow control ball valve, adopting the following technical solution:

[0006] The flow control ball valve includes a valve body base, a ball installed in the valve body base, and a valve stem used for sealing connection with the ball. The cross-section of the channel through which the medium passes through the ball is a quadrilateral. The two horizontal sides of the quadrilateral are arc-shaped structures with the arc openings facing each other, and the upper and lower sides of the quadrilateral are straight line segments and are arranged parallel to each other.

[0007] By adopting the above technical solution, when the ball valve adjusts the flow rate, the cross-sectional area of the two arc-shaped structures on the ball remains basically unchanged, only the middle rectangular cross-section changes. When the cross-sectional area of the two arc-shaped structures remains unchanged, the cross-section change per rotation of a certain degree is regular, gradually decreasing or gradually increasing, and the cross-sectional area data of the medium passing through also changes regularly. Therefore, the change of the rectangular cross-section can achieve good adjustment linearity and adjustment ratio, thereby improving the accuracy of valve flow control.

[0008] Optionally, a valve cover is further connected to the valve body base. The valve stem passes through the valve cover and extends outside the valve cover. The valve stem is threadedly connected to the valve cover. A guide pin is installed on the valve cover. The guide pin extends into the valve cover and contacts the valve stem. A spiral groove is formed on the valve stem, and one end of the guide pin extends into the spiral groove. A dial is installed on the valve cover. The valve stem includes an outer valve stem and an inner valve stem. A pointer is installed on the outer valve stem. An installation cavity is formed in the outer valve stem. One end of the inner valve stem extends into the installation cavity. One end of the inner valve stem is located outside the outer valve stem. An activity groove is formed on the rod wall of the inner valve stem within the installation cavity. An abutting member is arranged in the inner valve stem within the activity groove. An elastic member is arranged in the outer valve stem within the installation cavity to drive the abutting member to always have a tendency to move away from the guide pin. When the elastic member is squeezed, the abutting member and the guide pin form a contact relationship.

[0009] By adopting the above technical solution, the valve switch is manually adjusted. According to the pointer and the dial, the rotation angle of the valve stem can be directly obtained.

[0010] The cooperation between the inner valve stem and the outer valve stem enables the outer valve stem to drive the inner valve stem to rotate. By squeezing the elastic member, the inner valve stem and the guide pin form a contact relationship, increasing the friction between the guide pin and the valve stem. When the ball valve is finely adjusted, the valve stem rotates slowly, reducing the occurrence of excessive rotation of the valve stem and increasing the accuracy of the valve stem adjustment. When the rotation angle of the valve stem of the ball valve is relatively large, the elastic member is provided to leave a distance between the inner valve stem and the guide pin in the normal state, enabling the valve stem to quickly rotate to the specified angle.

[0011] Optionally, the activity groove has a guiding groove edge with the same contour as the spiral groove. When there is a distance between the abutting member and the guide pin, the guide pin contacts the guiding groove edge.

[0012] By adopting the above technical solution, when there is a distance between the abutting member and the guide pin, the guide pin contacts the guiding groove edge, enabling the inner valve stem to better rotate along with the rotation of the outer valve stem and increasing the overall connection relationship between the valve stem and the guide pin.

[0013] Optionally, the abutting member is made of an elastic material. The inner valve stem is further provided with a plug-in member. The guide pin is provided with a plug-in groove. After the abutting member is deformed by the extrusion of the inner valve stem and the guide pin, the plug-in member is inserted into the plug-in groove. A fixing component is arranged between the part of the inner valve stem extending outside the outer valve stem and the outer valve stem.

[0014] By adopting the above technical solution, when finely adjusting the ball valve, a force is applied to the inner valve stem to form a contact relationship between the abutting member and the guide pin; when the cross-section of the medium passage of the ball valve remains constant, the outer valve stem remains stationary, and the inner valve stem is continuously pushed to deform the abutting member, and the plug-in member is inserted into the plug-in groove, and then the inner valve stem and the outer valve stem are fixedly connected together by the fixing component, so that the outer valve stem can no longer rotate with the guide pin, and the entire valve stem is locked to prevent the manually controlled ball valve from being misoperated.

[0015] Optionally, the fixing component includes a pressure rod, which is rotatably connected between the pressure rod and the inner valve stem. The fixing component further includes a fixing ring, which is fixedly installed on the outer valve stem. The pressure rod is sleeved in the fixing ring. A connecting block is connected to the pressure rod. The fixing ring is provided with a slot for the connecting block to be inserted and a rotating groove for the connecting block to be rotated and inserted. The extending direction of the rotating groove is spiral.

[0016] By adopting the above technical solution, when the connecting block is embedded in the slot, the abutting member of the inner valve stem contacts the guide pin. When the connecting block enters the rotating groove along with the rotation of the pressure rod, the inner valve stem deforms the abutting member, and the plug-in member is inserted into the plug-in groove.

[0017] Optionally, the inner valve stem is connected with a guiding block, and the guiding block is slidably connected with the outer valve stem up and down.

[0018] By adopting the above technical solution, when the inner valve stem slides up and down on the outer valve stem, the guiding block plays a guiding role for the inner valve stem.

[0019] Optionally, the inner valve stem is inserted into a connecting rod in the moving groove, and both the abutting member and the plug-in member are installed on the connecting rod.

[0020] By adopting the above technical solution, after the abutting ball is repeatedly squeezed and deformed, the connecting rod can be pulled out and replaced.

[0021] Optionally, the guide pin is rotatably installed on the valve cover.

[0022] By adopting the above technical solution, the guide pin can rotate normally usually. When the plug-in member is inserted on the guide pin, if the guide pin is rotated continuously, the guide pin will not rotate because the plug-in member is mainly located inside the valve stem. Therefore, according to whether the guide pin can rotate, it can be verified whether the plug-in member is inserted on the guide pin.

[0023] In summary, the present application includes at least one of the following beneficial effects:

[0024] 1. The change of the rectangular cross-section of the sphere can achieve good adjustment linearity and adjustment ratio, thereby improving the accuracy of valve flow regulation;

[0025] 2. The frictional force between the guide pin and the valve stem can be adjusted. When the ball valve is finely adjusted, the frictional force of the guide pin is increased, and when the ball valve rotates at a large angle, the frictional force of the guide pin can be reduced. Description of the Drawings

[0026] Figure 1 is a schematic cross-sectional view of the passage for the medium to pass through various ball valves in the related art;

[0027] Figure 2 is an overall cross-sectional view of Embodiment 1 of the present application;

[0028] Figure 3 is a side view of Embodiment 1 of the present application;

[0029] Figure 4 is an overall cross-sectional view of Embodiment 2 of the present application;

[0030] Figure 5 is a schematic structural view showing the spiral groove in Embodiment 2 of the present application;

[0031] Figure 6 is a three-dimensional view of the overall structure of Embodiment 2 of the present application;

[0032] Figure 7 is an overall cross-sectional view showing the valve stem divided into an inner valve stem and an outer valve stem in Embodiment 2 of the present application;

[0033] Figure 8 is Figure 7 an enlarged view of part A in;

[0034] Figure 9 is a schematic view showing the distribution of the abutting balls in Embodiment 2 of the present application;

[0035] Figure 10 is an overall cross-sectional view of the valve stem in Embodiment 3 of the present application;

[0036] Figure 11 is a schematic structural view of the fixing ring in Embodiment 3 of the present application;

[0037] Figure 12 is Figure 10 an enlarged view of part B in;

[0038] Figure 13 is a schematic view showing the deformation of the abutting balls and the insertion of the plug into the guide pin in Embodiment 3 of the present application.

[0039] Explanation of the reference numerals: 10, valve body base; 20, ball; 21, channel; 30, valve stem; 31, spiral groove; 32, outer valve stem; 33, inner valve stem; 34, movable groove; 35, abutment ball; 36, connecting rod; 37, compression spring; 38, guide block; 39, plug-in connector; 40, valve cover; 50, guide pin; 51, guide groove; 60, handwheel; 70, dial; 80, pointer; 90, fixing assembly; 91, pressure rod; 92, fixing ring; 93, connecting block; 94, groove; 95, spiral groove. DETAILED DESCRIPTION

[0040] The following is combined with Figure 2-13 This application is described in further detail.

[0041] Embodiment 1,

[0042] Example 1 of the present application discloses a flow regulating ball valve. Figure 2 and Figure 3 The ball valve of the flow regulating ball valve adopts a small-diameter ball valve, and the flow regulating ball valve includes a valve body base 10, a ball 20 installed in the valve body base 10, and a valve stem 30 connected to the ball 20. The cross section of the channel 21 of the ball 20 for medium to pass through is a quadrilateral, the left and right sides of the quadrilateral are arc structures, and the arc mouths face oppositely, the upper and lower sides of the quadrilateral are straight line segments and are parallel to each other, and the arc ends of the arc structure are connected to form a rectangular structure with the upper and lower sides of the quadrilateral.

[0043] When a small-diameter ball valve is used to adjust the flow rate, the cross-sectional areas of the arc-shaped structures on both sides remain basically unchanged, and only the rectangular cross-sectional area in the middle changes. When the cross-sectional areas of the arc-shaped structures on both sides remain unchanged, the cross-sectional area changes regularly with each degree of rotation, gradually decreasing or increasing, and the cross-sectional area data through which the medium passes also changes regularly. Therefore, the change in the rectangular cross-sectional area can achieve good adjustment linearity and adjustment ratio.

[0044] The rotation angle of the ball 20 can be controlled by directly rotating the valve stem 30 of the small-diameter flow regulating ball valve. Most small-diameter flow regulating ball valves use intelligent regulating switches to control the angle of the ball 20. The intelligent regulating switch mainly adjusts the switch angle according to the ball valve rotation angle or time calculation signal, and can achieve temperature control, pressure regulation, flow regulation, etc. The connection relationship and principle of the intelligent regulating switch and the ball valve are prior art, which can be purchased and installed according to the instructions, and the embodiments of this application will not be described in detail.

[0045] Example 2

[0046] The difference between Example 2 and Example 1 is that the flow regulating ball valve of Example 2 adopts a large-diameter ball valve, and the structure of the ball 20 remains unchanged.

[0047] Reference Figure 4 and Figure 5, the valve body base 10 of the flow regulating ball valve is further connected with a valve cover 40, and one end of the valve stem 30 extends out of the valve cover 40. The valve stem 30 is threadedly connected with the valve cover 40, enabling the valve stem 30 to drive the ball 20 to rotate to open or close the ball 20. A sealing packing is filled between a part of the outer wall of the valve stem 30 and the valve cover 40, enabling the valve stem 30 to rotate in a sealed manner within the valve cover 40. A guide pin 50 is installed on the valve cover 40, and a spiral groove 31 is also formed on the outer wall of the valve stem 30. The spiral groove 31 has a spiral part and a guiding part, and the guiding part is located at both ends of the spiral groove 31. One end of the guide pin 50 extends into the spiral groove 31. During the rotation of the valve stem 30, the guide pin 50 cooperates with the spiral groove 31. When the guide pin 50 moves to one end of the spiral groove 31, the ball valve closes; when the guide pin 50 moves to the other end of the spiral groove 31, the ball valve is fully open.

[0048] The connection relationship between the ball 20 and the valve stem 30 and the cooperation relationship between the guide pin 50 and the spiral groove 31 of the valve stem 30 adopted in the embodiments of the present application belong to common knowledge and are not the key improved technologies of the present application, so no more elaboration will be made in the present application.

[0049] The large-diameter flow regulating ball valve is suitable for intelligent regulating type switches and can also adopt manual regulation, making the data accurate and intuitive.

[0050] Refer to Figure 6 , the large-diameter flow regulating ball valve in Embodiment 2 of the present application adopts a manual regulation method. A handwheel 60 is fixedly sleeved at one end of the valve stem 30 extending out of the valve cover 40. A dial 70 is fixedly installed on the valve cover 40, and a pointer 80 is fixedly installed on the valve stem 30. The opening angle of the ball 20 of the ball valve is intuitively reflected by the indication of the pointer 80 on the dial 70.

[0051] Refer to Figure 6 and Figure 7 , the valve stem 30 installed with the pointer 80 further includes an outer valve stem 32 and an inner valve stem 33. One end of the outer valve stem 32 away from the inner valve stem 33 is connected with the ball 20, and the pointer 80 is installed on the outer valve stem 32. An installation cavity is formed in the outer valve stem 32. One end of the inner valve stem 33 extends into the outer valve stem 32, and the other end extends out of the outer valve stem 32. The connection design between the inner valve stem 33 and the outer valve stem 32 does not affect the sealing performance between the valve stem 30 and the valve cover 40. When the outer valve stem 32 rotates, the valve stem 30 still normally drives the ball 20 to rotate to open or rotate to close.

[0052] Refer to Figure 8 and Figure 9, the inner valve stem 33 is slidably mounted up and down on the outer valve stem 32. An activity groove 34 is formed in the rod wall of the inner valve stem 33 located inside the outer valve stem 32. One end of the guide pin 50 extends into the activity groove 34, and the contour of the lower groove edge of the activity groove 34 is the same as that of the spiral groove 31. When the outer valve stem 32 drives the inner valve stem 33 to rotate, the outer valve stem 32 rotates through the cooperation of the spiral groove 31 and the guide pin 50, and the guide pin 50 is in sliding contact with the lower groove edge of the activity groove 34. An abutting member is arranged in the inner valve stem 33 in the activity groove 34, which can push the inner valve stem 33 to form a contact relationship between the abutting member and the guide pin 50.

[0053] Refer to Figure 9 , the abutting member is the abutting ball 35. A connecting rod 36 is inserted on the inner valve stem 33. The connecting rods 36 are distributed along the spiral contour of the spiral groove 31, and two adjacent abutting balls 35 are close to each other. The abutting member is the abutting ball 35 fixedly installed on the connecting rod 36, and the abutting balls 35 and the connecting rods 36 are in one-to-one correspondence. When the guide pin 50 enters the spiral part of the spiral groove 31, there is a gap between the guide pin 50 and the abutting ball 35. The inner valve stem 33 needs to be pressed to make the abutting ball 35 contact the guide pin 50. The contact between the abutting ball 35 and the guide pin 50 increases the friction between the guide pin 50 and the valve stem 30, but does not affect the rotation of the valve stem 30.

[0054] If the ball valve needs fine adjustment, after pressing the inner valve stem 33 to make the abutting ball 35 contact the guide pin 50, while keeping pressing the inner valve stem 33, rotate the outer valve stem 32 to make the whole valve stem 30 rotate slowly. If the adjustment angle of the ball valve is greater than 5°, the outer valve stem 32 can be directly rotated to reduce the friction force received by the guide pin 50 and quickly adjust to the required angle.

[0055] Refer to Figure 7 , in order to prevent the inner valve stem 33 from excessively driving the abutting ball 35 to press the guide pin 50, the inner valve stem 33 only slightly protrudes outside the outer valve stem 32. During actual operation, only one hand is used to control the adjustment of the valve. Press the inner valve stem 33 with the palm until the end of the inner valve stem 33 is flush with the end of the outer valve stem 32. While keeping pressing the inner valve stem 33 with the palm, grasp the handwheel 60 with the fingers and rotate the handwheel 60 to control the rotation of the outer valve stem 32.

[0056] Refer to Figure 7 , when the ball valve is in the state of allowing the medium to flow, the abutting member of the inner valve stem 33 can leave the guide pin 50 or keep in contact with the guide pin 50. In order to enable the abutting ball 35 to automatically leave the guide pin 50 when it is not in use, an elastic member that always has a tendency to drive the abutting ball 35 away from the guide pin 50 is arranged in the outer valve stem 32 in the installation cavity. The elastic member is a compression spring 37. One end of the compression spring 37 abuts against the inner valve stem 33, and the compression spring 37 abuts against the outer valve stem 32. When the abutting ball 35 contacts the guide pin 50, the compression spring 37 is in a compressed state. When the inner valve stem 33 is released, the elastic force of the compression spring 37 is released, thereby driving the inner valve stem 33 to drive the abutting ball 35 away from the guide pin 50.

[0057] Refer to Figure 7 , a guide block 38 is also connected to the side wall of the inner valve stem 33, a chute is provided on the outer valve stem 32, and the guide block 38 is slidably installed in the chute. The inner valve stem 33 can only move upward or downward under the guidance of the guide block 38.

[0058] The implementation principle of the flow regulating ball valve in Embodiment 2 of this application is as follows:

[0059] The flow regulating ball valve adopts a channel 21 cross-section with two arc-shaped sides and a middle rectangular structure. When regulating the flow, the two arc-shaped cross-sections remain basically unchanged, only the middle rectangular cross-section changes. Because the rectangular cross-section belongs to a simple cross-section, when the rectangular cross-section changes, the linearity and controllability are very good; in addition, in the actual operation of the regulating ball valve, the friction between the guide pin 50 and the valve stem 30 can be adjusted. When the angle that the valve stem 30 of the ball valve needs to rotate is relatively large, only the outer valve stem 32 is rotated, and the abutting ball 35 of the inner valve stem 33 and the guide pin 50 keep a distance, which can reduce the friction between the guide pin 50 and the valve stem 30, so that the valve stem 30 can quickly rotate to the specified angle; when the angle that the valve stem 30 of the ball valve needs to rotate is relatively small, first press the inner valve stem 33, and rotate the outer valve stem 32 while keeping the inner valve stem 33 pressed. The abutting ball 35 of the inner valve stem 33 and the guide pin 50 are in contact, which can appropriately increase the overall friction between the guide pin 50 and the valve stem 30, so that the valve stem 30 can rotate slowly to achieve the effect of accurate fine-tuning.

[0060] Embodiment 3

[0061] The difference between Embodiment 3 and Embodiment 2 is that a plug-in member 39 for plugging with the guide pin 50 is further installed on the connecting rod 36, and a fixing assembly 90 is provided between the inner valve stem 33 and the outer valve stem 32, and other structures are the same.

[0062] Refer to Figure 10 , when the ball valve maintains a certain cross-sectional area for the medium to flow through, the setting of the fixing assembly 90 can prevent the valve stem 30 from being easily twisted.

[0063] The fixing assembly 90 includes a pressure rod 91 and a fixing ring 92. The pressure rod 91 is sleeved in the fixing ring 92, and the outer rod wall of the pressure rod 91 contacts the inner wall of the fixing ring 92. The pressure rod 91 can be rotatably installed on the inner valve stem 33 through a bearing, and the fixing ring 92 is fixedly installed on the outer valve stem 32 through screws.

[0064] Refer to Figure 10 and Figure 11 , a connecting block 93 is fixedly connected to the rod wall of the end of the pressure rod 91 away from the inner valve stem 33. The fixing ring 92 is provided with a groove 94 for the connecting block 93 to be inserted, and a spiral groove 95 for the connecting block 93 to be screwed and rotated into. The extending direction of the spiral groove 95 is spiral, and the starting ends of the groove 94 and the spiral groove 95 are communicated.

[0065] Refer to Figure 10 and Figure 12 When the connecting block 93 is inserted into the groove 94, the abutting ball 35 only contacts the guide pin 50, and the frictional force between the guide pin 50 and the valve stem 30 increases.

[0066] Refer to Figure 12 While keeping the outer valve stem 32 stationary, when the pressure lever 91 is continuously rotated to make the connecting block 93 rotate into the spiral groove 95, the pressure lever 91 drives the inner valve stem 33 to continue moving downward. The abutting ball 35 is made of an elastic material, such as rubber. The pressure lever 91 drives the inner valve stem 33 to continue moving downward, causing the abutting ball 35 to be squeezed and deformed, increasing the contact surface between the abutting ball 35 and the guide pin 50, and further increasing the frictional force between the guide pin 50 and the valve stem 30.

[0067] In addition, refer to Figure 12 and Figure 13 An insertion part 39 is also installed on the connecting rod 36. The insertion part 39 can be a plug rod or a plug block. In the embodiment of the present application, it is a plug rod. The guide pin 50 is provided with a slot for the insertion part 39 to be inserted. Because of the deformation of the abutting ball 35, the insertion part 39 approaches the guide pin 50 and is inserted into the guide pin 50, forming a further connection relationship between the guide pin 50 and the insertion part 39. The outer valve stem 32 cannot slide and contact along the spiral groove 31 and the guide pin 50, and the outer valve stem 32 cannot be rotated. Only when the connecting block 93 is rotated back into the groove 94 and the insertion part 39 leaves the guide pin 50 can the valve stem 30 and the guide pin 50 rotate relative to each other.

[0068] In order to verify whether the guide pin 50 is inserted by the insertion part 39, the guide pin 50 is rotatably installed on the valve cover 40 through a sealed bearing. When the insertion part 39 is inserted into the guide pin 50, the guide pin 50 cannot rotate itself.

[0069] The implementation principle of the flow control ball valve in Embodiment 3 of the present application is as follows:

[0070] When the ball valve allows the medium to flow through a certain cross-sectional area, the outer valve stem 32 remains stationary. In order to further avoid misoperation, the inner valve stem 33 can be pressed down to drive the insertion part 39 to be inserted into the guide pin 50, so that the outer valve stem 32 is in a locked state, and the sphere 20 of the ball valve stably maintains a certain cross-sectional area for the medium to flow through.

[0071] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. Flow regulating ball valve, characterized in that: It includes a valve body base (10), a sphere (20) installed inside the valve body base (10), and a valve stem (30) for sealing connection with the sphere (20). The cross-section of the passage (21) for the medium to pass through the sphere (20) is quadrilateral. The two horizontal sides of the quadrilateral are arc-shaped structures with the arc openings facing each other, and the upper and lower sides of the quadrilateral are straight segments and are arranged parallel to each other.

2. The flow control ball valve according to claim 1, wherein: The valve body base (10) is also connected with a valve cover (40). The valve stem (30) penetrates through the valve cover (40) and extends outside the valve cover (40). The valve stem (30) is threadedly connected with the valve cover (40). A guide pin (50) is installed on the valve cover (40). The guide pin (50) extends into the valve cover (40) and contacts the valve stem (30). The valve stem (30) is provided with a spiral groove (31), and one end of the guide pin (50) extends into the spiral groove (31); A dial (70) is installed on the valve cover (40). The valve stem (30) includes an outer valve stem (32) and an inner valve stem (33). A pointer (80) is installed on the outer valve stem (32). An installation cavity is formed inside the outer valve stem (32). One end of the inner valve stem (33) extends into the installation cavity. One end of the inner valve stem (33) is located outside the outer valve stem (32). An activity groove (34) is formed on the rod wall of the inner valve stem (33) located in the installation cavity. An abutting member is arranged in the activity groove (34) of the inner valve stem (33). An elastic member for driving the abutting member to always have a tendency to move away from the guide pin (50) is arranged in the installation cavity of the outer valve stem (32). When the elastic member is squeezed, the abutting member and the guide pin (50) form a contact relationship.

3. The flow control ball valve according to claim 2, wherein: The activity groove (34) has a guiding groove edge with the same contour as the spiral groove (31). When there is a gap between the abutting member and the guide pin (50), the guide pin (50) contacts the guiding groove edge.

4. The flow regulating ball valve according to claim 2, wherein: The abutting member is made of an elastic material. The inner valve stem (33) is also provided with a plug-in member (39). The guide pin (50) is provided with a plug-in slot. After the abutting member is deformed by the extrusion of the inner valve stem (33) and the guide pin (50), the plug-in member (39) is inserted into the plug-in slot. A fixing component (90) is arranged between the part of the inner valve stem (33) extending outside the outer valve stem (32) and the outer valve stem (32).

5. The flow control ball valve according to claim 4, wherein: The fixing component (90) includes a pressure rod (91). The pressure rod (91) is rotatably connected with the inner valve stem (33). The fixing component (90) also includes a fixing ring (92). The fixing ring (92) is fixedly installed on the outer valve stem (32). The pressure rod (91) is sleeved inside the fixing ring (92). A connecting block (93) is connected to the pressure rod (91). The fixing ring (92) is provided with a slot for the connecting block (93) to be inserted and a spiral groove (95) for the connecting block (93) to rotate and insert into. The extending direction of the spiral groove (95) is spiral.

6. The flow regulating ball valve according to claim 5, characterized in that: The inner valve stem (33) is connected with a guide block (38), and the guide block (38) is connected with the outer valve stem (32) in a vertically sliding manner.

7. The flow control ball valve according to claim 4, wherein: The inner valve stem (33) is inserted into a connecting rod (36) in the movable groove (34), and both the abutting member and the inserting member (39) are mounted on the connecting rod (36).

8. The flow regulating ball valve according to claim 4, wherein: The guide pin (50) is rotatably mounted on the valve cover (40).

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