Flow adjusting ball valve

Abstract

The invention 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] The present application relates to the technical field of ball valves, and in particular to flow regulating ball valves. Background Art

[0002] Reference Figure 1 The flow regulation of existing residential heating heat metering pipelines mostly adopts traditional ball valves with circular diameters, or V-type ball valves and W-type ball valves.

[0003] When adjusting the flow rate, each time the valve is rotated one adjustment gear angle (for example, each adjustment gear is set to rotate 5 degrees as one adjustment gear angle), due to the shape of the cross-section of the water flow channel of the valve, the proportion of the adjustment change of the water flow channel cross-section is inconsistent every time it is rotated 5 degrees. Therefore, when adjusting the flow rate, the adjustment accuracy is not high, and repeated adjustments are required to reach the predetermined value, which is very troublesome. Similarly, the large-diameter flow control valves used for adjusting the balance of the residential heating network are also the same. Summary of the invention

[0004] In order to improve the accuracy of valve flow regulation, the present application provides a flow regulating ball valve.

[0005] This application provides a flow regulating ball valve, which adopts the following technical solution: A flow regulating ball valve comprises a valve body base, a sphere installed in the valve body base, and a valve stem for sealingly connecting with the sphere. The cross section of the channel of the sphere for medium to pass through is a quadrilateral, the two horizontal sides of the quadrilateral are arc structures with the arc openings facing oppositely, and the upper and lower sides of the quadrilateral are straight line segments and are arranged parallel to each other.

[0006] By adopting the above technical solution, when the ball valve is regulating the flow, the cross-sectional areas of the arc structures on both sides of the sphere remain basically unchanged, and only the rectangular cross-sectional area in the middle changes. When the cross-sectional areas of the arc 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 regulation linearity and regulation ratio, thereby improving the accuracy of valve flow regulation.

[0007] Optionally, the valve body base is also connected to a valve cover, the valve stem passes through the valve cover and extends out of the valve cover, the valve stem and the valve cover are threadedly connected, a guide pin is installed on the valve cover, the guide pin extends into the valve cover and contacts the valve stem, the valve stem is provided with a spiral groove, one end of the guide pin extends into the spiral groove; a dial is installed on the valve cover, the valve stem comprises an outer valve stem and an inner valve stem, the outer valve stem is provided with a pointer, an installation cavity is provided 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, a movable groove is provided on the stem wall of the inner valve stem located in the installation cavity, the inner valve stem is provided with an abutment in the movable groove, and the outer valve stem is provided with an elastic member in the installation cavity that drives the abutment to always have a tendency to move away from the guide pin, and when the elastic member is squeezed, the abutment and the guide pin form a contact relationship.

[0008] By adopting the above technical solution, the valve switch is manually adjusted, and the rotation angle of the valve stem can be intuitively obtained according to the pointer and the dial; The cooperation between the inner valve stem and the outer valve stem enables the outer valve stem to rotate with the inner valve stem. By squeezing the elastic part, the inner valve stem and the guide pin are in contact, which increases the friction between the guide pin and the valve stem. When fine-tuning the ball valve, the valve stem rotates slowly, reducing the occurrence of excessive rotation of the valve stem and increasing the accuracy of valve stem adjustment. When the valve stem of the ball valve rotates at a large angle, the setting of the elastic part allows the inner valve stem to have a distance from the guide pin under normal conditions, so that the valve stem can quickly rotate to the specified angle.

[0009] Optionally, the movable groove has a guide groove edge with the same profile as the spiral groove, and when a spacing is left between the abutment member and the guide pin, the guide pin contacts the guide groove edge.

[0010] By adopting the above technical solution, when there is a distance between the abutment and the guide pin, the guide pin contacts the guide groove edge, so that the inner valve stem can also rotate better along with the outer valve stem, thereby increasing the overall connection relationship between the valve stem and the guide pin.

[0011] Optionally, the abutment member is made of elastic material, the inner valve stem is also equipped with a plug-in member, the guide pin is provided with a plug-in groove, after the abutment member is squeezed and deformed by the inner valve stem and the guide pin, the plug-in member is plugged into the plug-in groove, and a fixing component is arranged between the part of the inner valve stem extending out of the outer valve stem and the outer valve stem.

[0012] By adopting the above technical solution, when fine-tuning the ball valve, force is applied to the inner valve stem to bring the abutment and the guide pin into contact; when the medium channel of the ball valve maintains a certain horizontal plane unchanged, the outer valve stem does not move, and continues to push the inner valve stem to deform the abutment, the connector is inserted into the connector groove, and then the inner valve stem and the outer valve stem are fixedly connected together through a fixing assembly, 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 operated incorrectly.

[0013] Optionally, the fixing assembly includes a pressure rod, which is rotatably connected to the inner valve stem. The fixing assembly also includes a fixing ring, which is fixedly mounted 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 inserting the connecting block and a rotation groove for rotating and screwing the connecting block into, and the extension direction of the rotation groove is spiral.

[0014] By adopting the above technical solution, when the connecting block is embedded in the slot, the abutment of the inner valve stem contacts the guide pin. When the connecting block enters the rotation groove along with the rotation of the pressure rod, the inner valve stem causes the abutment to deform and the connector is inserted into the connector slot.

[0015] Optionally, the inner valve stem is connected to a guide block, and the guide block and the outer valve stem are slidably connected up and down.

[0016] By adopting the above technical solution, when the inner valve stem slides up and down on the outer valve stem, the guide block guides the inner valve stem.

[0017] Optionally, the inner valve stem is inserted into the connecting rod in the movable groove, and the abutment member and the plug-in member are both installed on the connecting rod.

[0018] By adopting the above technical solution, after the abutment ball is squeezed and deformed multiple times, the connecting rod can be pulled out and replaced.

[0019] Optionally, the guide pin is rotatably mounted on the valve cover.

[0020] By adopting the above technical solution, the guide pin can rotate normally at ordinary times. When the connector is plugged into the guide pin, if the guide pin continues to be rotated, the guide pin will not rotate. Because the connector is mainly located in the valve stem, whether the connector is plugged into the guide pin is verified by whether the guide pin can be rotated.

[0021] In summary, the present application includes at least one of the following beneficial effects: 1. The rectangular cross-section change of the sphere can achieve good adjustment linearity and adjustment ratio, thereby improving the accuracy of valve flow regulation; 2. The friction between the guide pin and the valve stem can be adjusted. The friction of the guide pin can be increased when the ball valve is fine-tuned, and the friction of the guide pin can be reduced when the ball valve is rotated at a large angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic cross-sectional view of a passage through which a medium passes through various ball valves in the related art; Figure 2 is an overall cross-sectional view of Example 1 of the present application; Figure 3 is a side schematic diagram of Example 1 of the present application; Figure 4 is an overall cross-sectional view of Example 2 of the present application; Figure 5 This is a schematic diagram of the structure of the spiral groove in Example 2 of the present application; Figure 6 is a three-dimensional diagram of the overall structure of Example 2 of the present application; Figure 7 This is a schematic overall cross-sectional view of Example 2 of the present application after the valve stem is divided into an inner valve stem and an outer valve stem; Figure 8 yes Figure 7 A magnified schematic diagram of point A; Fig. 9 is a schematic diagram of the distribution of abutment balls according to Example 2 of the present application; Fig.10 is an overall cross-sectional view of the valve stem of Example 3 of the present application; Fig.11 is a schematic diagram of the fixing ring structure of Example 3 of the present application; Fig.12 yes Fig.10 An enlarged schematic diagram of point B; Fig.13 This is a schematic diagram of Embodiment 3 of the present application showing that the abutment ball is deformed and the connector is inserted into the guide pin.

[0023] 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

[0024] The following is combined with Figure 2-13 This application is described in further detail.

[0025] Embodiment 1, Example 1 of the present application discloses a flow regulating ball valve. Figure 2 and Figure 3The 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.

[0026] 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.

[0027] 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.

[0028] Example 2 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.

[0029] Reference Figure 4 and Figure 5 The valve body base 10 of the flow regulating ball valve is also connected to a valve cover 40, and one end of the valve stem 30 extends out of the valve cover 40. The valve stem 30 and the valve cover 40 are threadedly connected, so that the valve stem 30 can rotate with the ball 20 to open or close the ball 20. A sealing filler is filled between part of the outer rod wall of the valve stem 30 and the valve cover 40, so that the valve stem 30 can rotate in the valve cover 40 in a sealed manner. A guide pin 50 is installed on the valve cover 40. The outer rod wall of the valve stem 30 is also provided with a spiral groove 31. The spiral groove 31 has a spiral portion and a guide portion, and the guide portion 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 is closed, and when the guide pin 50 moves to the other end of the spiral groove 31, the ball valve is fully opened.

[0030] The connection relationship between the ball 20 and the valve stem 30 and the matching relationship between the guide pin 50 and the spiral groove 31 of the valve stem 30 used in the embodiment of the present application are all conventional knowledge and are not the key improved technologies of the present application, so they will not be elaborated in this application.

[0031] Large-diameter flow regulating ball valves are suitable for intelligent regulating switches, and can also be adjusted manually to make the data accurate and intuitive.

[0032] Reference Figure 6 The large-diameter flow regulating ball valve of Example 2 of the present application adopts a manual adjustment method. The end of the valve stem 30 of the ball valve extending from the valve cover 40 is fixedly sleeved with a hand wheel 60, a dial 70 is fixedly mounted on the valve cover 40, and a pointer 80 is fixedly mounted on the valve stem 30. The indication of the pointer 80 on the dial 70 intuitively reflects the opening angle of the ball body 20 of the ball valve.

[0033] Reference Figure 6 and Figure 7 The valve stem 30 on which the pointer 80 is installed further comprises 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 to the ball 20, and the pointer 80 is installed on the outer valve stem 32. An installation cavity is provided 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 between the valve stem 30 and the valve cover 40. When the outer valve stem 32 is rotated, the valve stem 30 still drives the ball 20 to rotate open or close normally.

[0034] Reference Figure 8 and Fig. 9 The inner valve stem 33 is slidably mounted on the outer valve stem 32. The inner valve stem 33 is located inside the outer valve stem 32 and has a movable groove 34. One end of the guide pin 50 extends into the movable groove 34. The lower groove edge profile of the movable groove 34 is the same as the profile of the spiral groove 31. When the outer valve stem 32 rotates with the inner valve stem 33, the outer valve stem 32 rotates in coordination with the spiral groove 31 and the guide pin 50, and the guide pin 50 and the lower groove edge of the movable groove 34 are in sliding contact. The inner valve stem 33 is provided with an abutment in the movable groove 34, which can push the inner valve stem 33 so that the abutment and the guide pin 50 form a contact relationship.

[0035] Reference Fig. 9 , the connecting piece is an abutment ball 35, and a connecting rod 36 is inserted on the inner valve stem 33. The connecting rod 36 is distributed along the spiral profile of the spiral groove 31, and two adjacent abutment balls 35 are close to each other. The abutment piece is an abutment ball 35 fixedly mounted on the connecting rod 36, and the abutment ball 35 and the connecting rod 36 correspond one to one. 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 abutment ball 35. Pressing the inner valve stem 33 can make the abutment ball 35 and the guide pin 50 contact. The contact between the abutment 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.

[0036] If the ball valve needs to be fine-tuned, the inner valve stem 33 can be pressed to make the abutting ball 35 contact the guide pin 50, and then the outer valve stem 32 can be rotated while keeping the inner valve stem 33 pressed, so that the valve stem 30 can rotate slowly as a whole. If the ball valve adjustment angle is greater than 5°, the outer valve stem 32 can be directly rotated to reduce the friction force on the guide pin 50 and quickly adjust to the required angle.

[0037] Reference Figure 7 In order to reduce 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. In actual operation, only one hand is used to control the regulating valve. After pressing 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, the palm keeps pressing the inner valve stem 33, and the fingers hold the hand wheel 60 and turn the hand wheel 60 to control the rotation of the outer valve stem 32.

[0038] Reference Figure 7 When the ball valve is in a medium flow state, the abutment of the inner valve stem 33 can leave the guide pin 50, or keep in contact with the guide pin 50. In order to make the abutment ball 35 automatically leave the guide pin 50 when it is not working, the outer valve stem 32 is provided with an elastic member in the installation cavity to drive the abutment ball 35 to always have a tendency to move away from the guide pin 50. The elastic member is a compression spring 37, one end of which abuts the inner valve stem 33, and the compression spring 37 abuts the outer valve stem 32. When the abutment 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 leave the guide pin 50 with the abutment ball 35.

[0039] Reference Figure 7 The side wall of the inner valve stem 33 is also connected with a guide block 38, and the outer valve stem 32 is provided with a slide groove, and the guide block 38 is slidably installed in the slide groove. Under the guidance of the guide block 38, the inner valve stem 33 can only move upward or downward.

[0040] The implementation principle of the flow regulating ball valve of Example 2 of the present application is: The flow regulating ball valve adopts a channel 21 cross section with arcs on both sides and a rectangular structure in the middle. When the flow is adjusted, the arc sections on both sides remain basically unchanged, but the rectangular cross section in the middle changes. Because the rectangular cross section is a simple cross section, the linearity and controllability of the rectangular cross section when it changes are very good; in addition, in the actual operation of adjusting the ball valve, the friction between the guide pin 50 and the valve stem 30 can be adjusted. When the angle at which the valve stem 30 of the ball valve needs to be rotated is relatively large, only the outer valve stem 32 is rotated, and the contact ball 35 of the inner valve stem 33 and the guide pin 50 maintain a distance, which can reduce the friction between the guide pin 50 and the valve stem 30, so that the valve stem 30 can be quickly rotated to a specified angle; when the angle at which the valve stem 30 of the ball valve needs to be rotated is relatively small, the inner valve stem 33 is pressed first, and the outer valve stem 32 is rotated while keeping the inner valve stem 33 pressed, and the contact ball 35 of the inner valve stem 33 is in contact with the guide pin 50, which can appropriately increase the overall friction between the guide pin 50 and the valve stem 30, so that the valve stem 30 can be slowly rotated to achieve the effect of accurate fine-tuning.

[0041] Example 3 The difference between Example 3 and Example 2 is that a connector 39 for connecting with the guide pin 50 is also 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. The other structures are the same.

[0042] Reference Fig.10 When the ball valve maintains a certain cross-sectional area for medium to flow, the valve stem 30 can be prevented from being twisted easily by the setting of the fixing assembly 90 .

[0043] 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 mounted on the inner valve stem 33 through a bearing, and the fixing ring 92 is fixedly mounted on the outer valve stem 32 by screws.

[0044] Reference Fig.10 and Fig.11 The rod wall at one end of the pressure rod 91 away from the inner valve rod 33 is fixedly connected with a connecting block 93, and the fixing ring 92 is provided with a groove 94 for the connecting block 93 to be inserted, and a rotating groove 95 for the connecting block 93 to enter by spiral rotation. The extending direction of the rotating groove 95 is spiral, and the groove 94 is connected to the starting end of the rotating groove 95.

[0045] Reference Fig.10 and Fig.12 When the connecting block 93 is inserted into the groove 94, the abutting ball 35 only contacts the guide pin 50, and the friction between the guide pin 50 and the valve stem 30 increases.

[0046] Reference Fig.12, while keeping the outer valve stem 32 stationary, the pressure rod 91 is continuously rotated to rotate the connecting block 93 into the rotation groove 95, and the pressure rod 91 drives the inner valve stem 33 to continue to move downward. The abutment ball 35 is made of an elastic material, such as rubber. The pressure rod 91 drives the inner valve stem 33 to continue to move downward, so that the abutment ball 35 is squeezed and deformed, increasing the contact surface between the abutment ball 35 and the guide pin 50, and further increasing the friction between the guide pin 50 and the valve stem 30.

[0047] In addition, refer to Fig.12 and Fig.13 , a plug-in connector 39 is also installed on the connecting rod 36, and the plug-in connector 39 can be a plug-in rod or a plug-in block. In the embodiment of the present application, it is a plug-in rod. The guide pin 50 is provided with a slot for inserting the plug-in connector 39. The plug-in connector 39 approaches the guide pin 50 due to the deformation of the abutment ball 35 and is inserted into the guide pin 50, so that the guide pin 50 and the plug-in connector 39 form a further connection relationship, and the outer valve stem 32 cannot slide along the spiral groove 31 and contact 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 plug-in connector 39 leaves the guide pin 50, can the valve stem 30 and the guide pin 50 rotate relative to each other.

[0048] In order to verify whether the guide pin 50 is plugged by the plug connector 39, the guide pin 50 is rotatably mounted on the valve cover 40 through a sealed bearing. When the plug connector 39 is inserted into the guide pin 50, the guide pin 50 cannot rotate.

[0049] The implementation principle of the flow regulating ball valve of Example 3 of the present application is: 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 and the connector 39 can be driven to insert into the guide pin 50, so that the outer valve stem 32 is in a locked state, and the ball 20 of the ball valve stably maintains a certain cross-sectional area for the medium to flow through.

[0050] The above are all 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. Flow regulating ball valve, characterized by: The invention comprises a valve body base (10), a sphere (20) installed in the valve body base (10), and a valve stem (30) for sealingly connecting with the sphere (20); the cross section of the passage (21) of the sphere (20) for medium to pass through is a quadrilateral; the two sides of the quadrilateral in the horizontal direction are arc-shaped structures with the arc openings facing each other; the upper and lower sides of the quadrilateral are straight line segments and are arranged parallel to each other.

2. The flow regulating ball valve according to claim 1, characterized in that: The valve body base (10) is also connected to a valve cover (40), the valve stem (30) penetrates the valve cover (40) and extends out of the valve cover (40), the valve stem (30) and the valve cover (40) are threadedly connected, 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); The valve cover (40) is provided with a dial (70), the valve stem (30) comprises an outer valve stem (32) and an inner valve stem (33), the outer valve stem (32) is provided with a pointer (80), a mounting cavity is provided in the outer valve stem (32), one end of the inner valve stem (33) extends into the mounting cavity, one end of the inner valve stem (33) is located outside the outer valve stem (32), a movable groove (34) is provided in the stem wall of the inner valve stem (33) located in the mounting cavity, the inner valve stem (33) is provided with an abutment member in the movable groove (34), and the outer valve stem (32) is provided with an elastic member in the mounting cavity that drives the abutment member to always have a tendency to move away from the guide pin (50), and when the elastic member is squeezed, the abutment member and the guide pin (50) form a contact relationship.

3. The flow regulating ball valve according to claim 2, characterized in that: The movable groove (34) has a guide groove edge with the same profile as the spiral groove (31), and when a spacing is left between the abutment member and the guide pin (50), the guide pin (50) contacts the guide groove edge.

4. The flow regulating ball valve according to claim 2, characterized in that: The abutment 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 groove. After the abutment member is squeezed and deformed by the inner valve stem (33) and the guide pin (50), the plug-in member (39) is plugged into the plug-in groove. A fixing component (90) is provided between the portion of the inner valve stem (33) extending out of the outer valve stem (32) and the outer valve stem (32).

5. The flow regulating ball valve according to claim 4, characterized in that: The fixing assembly (90) comprises a pressure rod (91), wherein the pressure rod (91) and the inner valve stem (33) are rotatably connected. The fixing assembly (90) further comprises a fixing ring (92), wherein the fixing ring (92) is fixedly mounted on the outer valve stem (32), wherein the pressure rod (91) is sleeved in the fixing ring (92), wherein a connecting block (93) is connected to the pressure rod (91), and wherein the fixing ring (92) is provided with a slot for inserting the connecting block (93) and a rotation groove (95) for rotating and screwing the connecting block (93), wherein the extending direction of the rotation groove (95) is spiral.

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

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

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

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