Self-compensating intelligent block valve

Abstract

The invention relates to the technical field of block valves, in particular to a self-compensation type intelligent block valve. Comprising a valve body, a ball body is rotatably connected in the valve body, the valve body is provided with a liquid inlet and a liquid outlet, the upper side of the ball body is fixedly connected with a valve rod rotatably connected with the valve body, the upper side of the valve body is rotatably connected with a rotating rod perpendicular to the space of the valve rod, and the upper side of the valve body is provided with a first cavity; the rotating rod and the valve rod are in transmission through a power module, the valve rod is in limited sliding connection with an inserting rod, and the inserting rod is fixedly connected with a limiting column. According to the cut-off valve, the limiting column is clamped into the upper side of the limiting groove to accurately control opening and closing of the ball body, whether the ball body is in the opening and closing state or not is directly fed back to an operator through the extending length of the inserting rod, and transmission deviation caused by problem observation of the operator or pipeline vibration is avoided; therefore, an operator misjudges the state of the cut-off valve, and normal operation of the cut-off valve is affected.

Description

Technical Field

[0001] This invention relates to the field of shut-off valve technology, and in particular to a self-compensating intelligent shut-off valve. Background Technology

[0002] A shut-off valve is a valve that isolates fluid in a pipeline. Its main types include gate valves, ball valves, and butterfly valves. Among them, ball valves are widely used in various pipeline transportation fields due to their advantages such as rapid opening and closing and good fluid shut-off effect.

[0003] Currently, ball valves have the following problems: 1. Some ball valves directly control the rotation of the ball by installing a swing plate on the valve stem, so that the swing plate rotates synchronously with the ball. If the operator does not rotate to 90° or exceeds 90° when opening and closing, the ball valve will not be fully opened or closed. This method cannot accurately control the rotation angle of the ball.

[0004] 2. Some ball valves improve the operator's control accuracy through the high transmission ratio of the gear set. In most cases, manual operation is required during the opening and closing of the shut-off valve. The operator usually judges the opening and closing status of the shut-off valve by rotating the lever and the marked scale. However, relying on visual observation may result in insufficient or excessive rotation, which will lead to incomplete opening or closing of the shut-off valve and failure to achieve the effect of shutting off the water flow. Summary of the Invention

[0005] To overcome the shortcomings of ball valves, such as the inability to precisely control the rotation angle of the ball and the incomplete opening or closing of the shut-off valve, which prevents the water flow from being completely cut off, this invention provides a self-compensating intelligent shut-off valve with feedback function.

[0006] Technical Solution: A self-compensating intelligent shut-off valve includes a valve body, a ball rotatably connected within the valve body, an inlet and an outlet, a valve stem rotatably connected to the upper side of the ball, a rotating rod rotatably connected to the upper side of the valve body perpendicular to the valve stem, a first cavity on the upper side of the valve body, a power module for transmission between the rotating rod and the valve stem, the power module of the rotating rod being located within the first cavity, a limiting sleeve fixed to the upper side of the valve body, a sliding insertion rod connected to the valve stem for limiting, a spring between the insertion rod and the valve stem, two limiting grooves deflected by 90° relative to the limiting sleeve, an annular groove communicating with both limiting grooves, and a limiting post slidably connected to the insertion rod within the limiting grooves and the annular groove.

[0007] More preferably, the transmission ratio between the rotating rod and the valve stem is between 3:1 and 5:1.

[0008] More preferably, the upper width of the limiting groove is equal to the diameter of the limiting post, and the width of the limiting groove gradually increases from the middle downwards.

[0009] More preferably, the valve body has symmetrically distributed fixing rings fixedly connected to it, and a connecting ring is fixedly connected to the side of the fixing ring near the ball. The connecting ring is made of rubber, and a sealing ring is fixedly connected to the side of the connecting ring near the ball. The symmetrically distributed sealing rings are used to seal the ball and the valve body.

[0010] More preferably, the shape of the ball near the liquid inlet of the valve body is set as a stepped shape, and the sealing ring near the liquid inlet of the valve body is used to seal the stepped part of the ball.

[0011] More preferably, the valve body is provided with symmetrically distributed open rings, which are located outside and in contact with the adjacent connecting rings. The openings of the open rings are fixedly connected to symmetrically distributed fixed rods. The lower side of the valve body is provided with a second cavity. In the second cavity of the valve body, near the open rings, symmetrically distributed swing rods are hinged. The swing rods correspond one-to-one with the fixed rods. The swing rods are used to press the corresponding fixed rods. The swing rods are hinged to guide rods. The lower side of the valve body is provided with a locking assembly, which is used to move the guide rods.

[0012] More preferably, the diameter of the outer side of the connecting ring gradually decreases from the middle to both sides, and the diameter of the inner side of the open ring gradually decreases from the middle to both sides.

[0013] More preferably, the locking assembly includes a rotating sleeve rotatably connected to the lower side of the valve body, a ball fixedly connected to a connecting rod rotatably connected to the rotating sleeve, a guide block slidably connected to the lower side of the valve body and located in the second cavity, the guide block being threadedly connected to the rotating sleeve, and symmetrically distributed guide grooves on both sides of the guide block, the guide rod sliding within the guide groove of the adjacent guide block.

[0014] More preferably, the distance between the guide grooves on the same side of the guide block remains consistent from the top to the middle, and the distance between the guide grooves on the same side of the guide block gradually moves away from the middle to the bottom.

[0015] More preferably, the connecting rod is fixedly connected to a locking block, the locking block being slidably connected to the guide block, and the guide block being used to limit the locking block.

[0016] The beneficial effects of this invention are as follows: This shut-off valve precisely controls the opening and closing of the ball by the limiting post engaging with the upper side of the limiting groove. The extension length of the insert rod directly feeds back to the operator whether the ball is in the open or closed state, avoiding transmission deviations caused by operator observation problems or pipeline vibrations, which could lead to misjudgments of the shut-off valve's status and affect its normal operation. Before opening and closing, this shut-off valve reduces the compressive force between the sealing ring and the ball. After the valve is opened or closed, the compressive force between the sealing ring and the ball is increased, ensuring smooth opening and closing of the shut-off valve without affecting the sealing performance between the sealing ring and the ball. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural cross-sectional view of the present invention; Figure 3 This is a three-dimensional cross-sectional view of the valve body and ball of the present invention; Figure 4 This is a three-dimensional structural diagram of the limiting groove and limiting post of the present invention; Figure 5 This is an exploded three-dimensional view of the limiting sleeve and insert rod of the present invention; Figure 6 For the present invention Figure 3 Enlarged view of the 3D structure at point A; Figure 7 This is an exploded three-dimensional view of the sphere, fixing ring, connecting ring, and sealing ring of the present invention. Figure 8 This is an exploded view of the three-dimensional structure of the connecting ring and the open ring of the present invention; Figure 9 This is a three-dimensional cross-sectional view of the rotating sleeve and guide block of the present invention; Figure 10 This is a three-dimensional structural diagram of the fixed rod and the swing rod of the present invention; Figure 11 This is a three-dimensional structural diagram of the card block and guide block of the present invention.

[0018] In the attached diagram: 1: Valve body, 101: First cavity, 102: Second cavity, 2: Ball, 201: Connecting rod, 202: Locking block, 3: Valve stem, 4: Rotating rod, 5: Limiting sleeve, 501: Limiting groove, 502: Annular groove, 6: Insert rod, 7: Limiting post, 801: Fixing ring, 802: Connecting ring, 803: Sealing ring, 9: Open ring, 10: Fixing rod, 11: Swinging rod, 12: Guide rod, 13: Rotating sleeve, 14: Guide block. Detailed Implementation

[0019] The invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are shown. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art. The intelligence in this embodiment is solely for assisting the operation of the shut-off valve.

[0020] Example 1 A self-compensating intelligent shut-off valve, such as Figures 1-5 As shown, the device includes a valve body 1, a ball 2 rotatably connected inside the valve body 1, an inlet on the left side of the valve body 1, and an outlet on the right side. A valve stem 3, rotatably connected to the upper side of the ball 2, is fixed to the upper side of the ball 2. A rotating rod 4, perpendicular to the valve stem 3, is rotatably connected to the upper left side of the valve body 1. A rotating wheel is fixed to the front side of the rotating rod 4. A first cavity 101 is provided on the upper side of the valve body 1, and the upper side of the valve stem 3 is located within the first cavity 101. The rotating rod 4 and the valve stem 3 are driven by a power module located within the first cavity 101. The power module consists of two pairs of bevel gears. The transmission ratio between the rotating rod 4 and the valve stem 3 is between 3:1 and 5:1, ensuring that the rotating rod 4 precisely controls the valve stem 3. This avoids the rotating rod 4 rotating too many times, which would affect the opening and closing speed of the shut-off valve, and also avoids the rotating rod 4 rotating too few times, which would prevent precise control. A limiting sleeve 5, coaxial with the valve stem 3, is fixedly connected to the upper side of the valve body 1. A sliding insert 6 is slidably connected to the upper side of the valve stem 3. The insert 6 can only slide longitudinally relative to the valve stem 3 and cannot rotate. The upper diameter of the insert 6 is larger than its lower diameter. The insert 6 and... A spring is installed between the valve stems 3. Limiting grooves 501 are provided on the right and rear sides of the inner wall of the limiting sleeve 5. The two limiting grooves 501 are deflected 90° around the limiting sleeve 5. The limiting sleeve 5 has an annular groove 502 that communicates with the lower sides of both limiting grooves 501. A limiting post 7 is fixedly connected to the upper right side of the insert rod 6, sliding within the limiting grooves 501 and annular grooves 502. The upper width of the limiting groove 501 is equal to the diameter of the limiting post 7, ensuring that when the limiting post 7 is located above the limiting groove 501, the limiting post 7 and the limiting sleeve 5 will not rotate relative to each other. The width of the limiting groove 501... The angle gradually increases from the middle downwards, so the limiting post 7 will smoothly enter the lower side of the limiting groove 501, increasing the floating range of the limiting post 7 position, which facilitates subsequent adjustment of the limiting post 7 position. This shut-off valve has been working for a long time, and is affected by factors such as pipeline vibration, which may cause the wheel on the rotating rod 4 to loosen or the transmission ratio between the rotating rod 4 and the valve stem 3 to change. Therefore, an angle rotary encoder (detecting the number of rotations or angle of the shaft) can be installed on both the wheel of the rotating rod 4 and the valve stem 3 to realize intelligent detection of this shut-off valve, and to regularly maintain this shut-off valve according to the detection results.

[0021] Figure 2The state shown is the open state of this shut-off valve. At this time, the fluid flows through the inlet on the left side of the valve body 1, through the ball 2, and out through the outlet on the right side of the valve body 1. In the initial state, the limiting post 7 is stuck in the upper part of the right limiting groove 501 and cannot rotate. Therefore, the insert rod 6, the valve stem 3, and the ball 2 below it cannot rotate, ensuring that the ball 2 remains in a horizontally open state during the fluid delivery process. This avoids the ball 2 being slightly deflected by the vibration of the pipeline, which would partially block the fluid and affect the fluid flow rate.

[0022] When it is necessary to close this shut-off valve, the operator must first release the limit of the insert rod 6. The specific operation is as follows: the operator presses the insert rod 6 downwards, compressing the spring between the insert rod 6 and the valve stem 3. The insert rod 6 drives the limit post 7 to move downwards. The limit post 7 begins to move downwards along the right limit groove 501. When the limit post 7 moves into the annular groove 502, the upper side of the insert rod 6 is flush with the upper surface of the limit sleeve 5. Subsequently, the operator rotates the rotating rod 4. The rotating rod 4 drives the valve stem 3 to rotate counterclockwise through the power module. The valve stem 3 drives the ball 2 to rotate counterclockwise. During the counterclockwise rotation of the valve stem 3... In the process, the valve stem 3 drives the limiting pin 7 to rotate counterclockwise via the insert rod 6. When the ball 2 rotates 90° relative to its initial position, the shut-off valve closes, and the limiting pin 7 rotates to the bottom of the rear limiting groove 501. At this time, the operator no longer presses the insert rod 6, and the spring between the insert rod 6 and the valve stem 3, which is in a compressed state, returns to its original position, causing the insert rod 6 to move upward. The insert rod 6 drives the limiting pin 7 to enter the rear limiting groove 501 from below. When the limiting pin 7 is located at the top of the rear limiting groove 501, the limiting pin 7 is limited again. Therefore, the ball 2 is limited, thus ensuring that the shut-off valve is in the closed state.

[0023] When the shut-off valve needs to be opened, the operator presses down on the insert rod 6, compressing the spring between the insert rod 6 and the valve stem 3. The insert rod 6 drives the limiting post 7 to move downwards. The limiting post 7 begins to move downwards along the rear limiting groove 501. When the limiting post 7 moves into the annular groove 502, the upper side of the insert rod 6 is flush with the upper surface of the limiting sleeve 5. Subsequently, the operator rotates the rotating rod 4 in the opposite direction. The rotating rod 4 drives the valve stem 3 to rotate clockwise through the power module. The valve stem 3 drives the ball 2 to rotate clockwise. During the clockwise rotation of the valve stem 3, the valve stem 3 passes through the insert rod 6... The limiting column 7 rotates clockwise. When the ball 2 rotates 90° relative to its initial position, the shut-off valve opens. The limiting column 7 rotates to the right limiting groove 501 directly below. At this time, the operator no longer presses the insert rod 6. The spring between the insert rod 6 and the valve stem 3, which is in a compressed state, returns to its original position and moves the insert rod 6 upward. The insert rod 6 drives the limiting column 7 into the right limiting groove 501. When the limiting column 7 is located at the upper part of the right limiting groove 501, the limiting column 7 is limited again. Therefore, the ball 2 is limited, thus ensuring that the shut-off valve is in the open state.

[0024] During the opening and closing of this shut-off valve, the operator rotates the lever 4. The operator controls the number of rotations of the lever 4 to achieve precise control of the ball 2. The transmission ratio between the lever 4 and the valve stem 3 is set between 3:5:1, ensuring that the lever 4 accurately controls the valve stem 3. This avoids excessive rotations of the lever 4, which would affect the opening and closing speed of the shut-off valve, and also avoids insufficient rotations, which would prevent precise control. In most cases, manual operation is required during the opening and closing of the shut-off valve. The operator usually judges the opening and closing status of the shut-off valve by the number of rotations of the lever 4 and the marked scale. However, relying on visual observation may result in insufficient or excessive rotations, leading to incomplete opening or closing of the shut-off valve and failure to achieve the effect of cutting off the water flow.

[0025] When this shut-off valve opens and closes, as the limiting pin 7 moves from the annular groove 502 into the limiting groove 501, the width of the limiting groove 501 gradually increases from the middle downwards. Therefore, the limiting pin 7 smoothly enters the lower side of the limiting groove 501, increasing the floating range of the limiting pin 7's position and facilitating subsequent adjustment of its position. If the ball 2 is not fully open or closed at this time, the limiting pin 7 will not enter the upper side of the limiting groove 501. If the operator observes that the insertion rod 6 does not extend sufficiently beyond the limiting sleeve 5, the operator needs to rotate the rotating rod 4 in a small range. Therefore, the valve stem 3 drives the limiting pin 7 to rotate in a small range via the insertion rod 6. When the limiting pin 7 is aligned with the upper side of the limiting groove 501, the limiting pin 7 enters the limiting groove 501. At the top of valve 1, when the operator observes that the length of the insert rod 6 extending out of the limiting sleeve 5 has returned to its initial length, the operator no longer adjusts the rotating rod 4. At this time, the ball 2 is in a fully open or closed state. In the above operation, the position of the ball 2 is indirectly adjusted by gradually adjusting the position of the limiting column 7, which automatically compensates for the error caused by the looseness of the rotating wheel of the rotating rod 4 or the change in the transmission ratio between the rotating rod 4 and the valve stem 3. This shut-off valve accurately controls the opening and closing of the ball 2 by the limiting column 7 being inserted into the limiting groove 501. The extension length of the insert rod 6 directly feeds back to the operator whether the ball 2 is in an open or closed state, avoiding transmission deviations caused by operator observation problems or pipeline vibrations, which could lead to misjudgment of the shut-off valve's status by the operator and affect the normal operation of the shut-off valve.

[0026] Example 2 Based on Example 1, a self-compensating intelligent shut-off valve, such as Figure 2 , Figure 3 and Figures 6-8As shown, two symmetrically distributed fixing rings 801 are fixed inside the valve body 1. The two fixing rings 801 are located on the left and right sides of the ball 2, respectively. A connecting ring 802 is fixed to the side of the fixing ring 801 closest to the ball 2. The connecting ring 802 is made of rubber. A sealing ring 803 is fixed to the side of the connecting ring 802 closest to the ball 2. The two sealing rings 803 are used to seal the ball 2 and the valve body 1. The left side of the ball 2 is stepped. The sealing ring 803 on the left side is used to seal the stepped part of the ball 2, thereby increasing the contact area between the sealing ring 803 on the left side and the left side of the ball 2, thus increasing the sealing performance between the sealing ring 803 on the left side and the left side of the ball 2.

[0027] like Figure 6 , Figure 7 and Figures 9-10 As shown, two symmetrically distributed open rings 9 are provided inside the valve body 1. The open rings 9 are located on the outside of and in contact with the adjacent connecting ring 802. The diameter of the outer side of the connecting ring 802 gradually decreases from the middle to both sides, and the diameter of the inner side of the open ring 9 gradually decreases from the middle to both sides. The small contact area between the inner side of the open ring 9 and the outer side of the connecting ring 802 reduces the friction between the inner side of the open ring 9 and the outer side of the connecting ring 802, facilitating the compression of the outer side of the connecting ring 802 by the open ring 9. When the open ring 9 compresses the connecting ring 802, the connecting ring 802 is compressed and extends to the left and right sides. The lower side of the open ring 9 is the opening. Two fixed rods 10 are fixedly connected to the opening of the open ring 9, which are symmetrically distributed front and back. The two fixed rods 10 approach each other, causing the open ring 9 to press against the outer side of the connecting ring 802. After being pressed, the connecting ring 802 deforms and pushes the two sealing rings 803 closer to each other. A second cavity 102 is provided on the lower side of the valve body 1. Four swing rods 11 are hinged in the second cavity 102 of the valve body 1, which are symmetrically distributed. The swing rods 11 correspond one-to-one with the fixed rods 10. The swing rods 11 are used to press against the corresponding fixed rods 10. The swing rods 11 are hinged to guide rods 12. A locking assembly is provided on the lower side of the valve body 1. The locking assembly is used to move the four guide rods 12.

[0028] like Figures 9-11As shown, the locking assembly includes a rotating sleeve 13, which is rotatably connected to the lower side of the valve body 1. A ball 2 is fixedly connected to a connecting rod 201 rotatably connected to the rotating sleeve 13. The rotating sleeve 13 is located outside the connecting rod 201. A guide block 14 located in the second cavity 102 is slidably connected to the lower side of the valve body 1. The guide block 14 is located above the rotating sleeve 13 and is threadedly connected to the upper part of the rotating sleeve 13. Two guide grooves are provided on the left and right sides of the guide block 14, which are symmetrically distributed. The guide rod 12 slides in the guide grooves of adjacent guide blocks 14. The distance between the guide grooves on the same side of the guide block 14 remains consistent from the top to the middle. 4. The distance between the guide grooves on the same side gradually increases from the middle to the bottom. A locking block 202 is fixed to the upper part of the right side of the connecting rod 201. The locking block 202 is slidably connected to the guide block 14. The right and rear sides of the guide block 14 are provided with locking slots for the locking block 202. The two slots of the guide block 14 are deflected by 90° with the connecting rod 201 as the reference. The guide block 14 is provided with an annular groove located below its two slots. The two slots of the guide block 14 are connected to the annular groove. The locking block 202 is used to limit the connecting rod 201. The connecting rod 201 drives the locking block 202 to move downward. When the locking block 202 moves to the annular groove of the guide block 14, the locking block 202 is no longer limited by the guide block 14.

[0029] During the installation of a shut-off valve, a sealing ring is typically installed at the connection between the valve body 1 and the ball 2 to seal the connection. To increase the sealing performance between the sealing ring and the ball 2, the sealing ring exerts a compressive force on the ball 2 after installation. However, friction occurs between the ball 2 and the sealing ring during the opening or closing of the shut-off valve. Prolonged use can damage the sealing ring or the ball 2. Furthermore, excessive compressive force between the sealing ring and the ball 2 can affect the opening or closing process of the shut-off valve (due to the friction between the sealing ring and the ball 2, the ball 2 experiences resistance from the sealing ring during rotation). To address these issues, this shut-off valve reduces the compressive force between the sealing ring and the ball 2 before opening and closing, and then increases the compressive force after the valve is opened or closed. This ensures smooth opening and closing of the shut-off valve without affecting the sealing performance between the sealing ring and the ball 2.

[0030] Before the shut-off valve closes, the initial state of the connecting ring 802 is compressed by the open ring 9. The operator rotates the rotating sleeve 13, which drives the guide block 14 to move upward. During the upward movement of the guide block 14, the guide rod 12 gradually enters the lower side of the guide groove of the adjacent guide block 14. Taking the two guide rods 12 on the left as an example, the distance between the two guide rods 12 gradually increases. Therefore, the squeezing force of the two swing rods 11 on the two fixed rods 10 decreases, and the squeezing force of the open ring 9 on the outside of the connecting ring 802 decreases. The connecting ring 802 gradually resets, causing the sealing ring 803 to move to the left, reducing the squeezing force of the sealing ring 803 on the left side of the ball 2. At the same time, the squeezing force of the right sealing ring 803 on the right side of the ball 2 decreases. When the open ring 9 no longer compresses the adjacent connecting ring 802, the operator stops rotating the rotating sleeve 13 and then opens the shut-off valve.

[0031] When the shut-off valve is opened, the operator rotates the rotating sleeve 13 in the reverse direction. The rotating sleeve 13 drives the guide block 14 to move downward. Taking the two guide rods 12 on the left as an example, the two guide rods 12 on the left gradually move to the upper side of the guide groove of the adjacent guide block 14, and the distance between the two guide rods 12 decreases. The two guide rods 12 drive the two swing rods 11 to squeeze the two fixed rods 10. The two fixed rods 10 cause the open ring 9 to squeeze the outside of the connecting ring 802. After being squeezed, the connecting ring 802 deforms and pushes the sealing ring 803 to move to the right. When the existing sealing ring seals the connection between the ball and the valve seat, its sealing pressure is between 0.5MPa and 1.5MPa. Therefore, the operator only needs to rotate the rotating sleeve 13 to make the pressure of the open ring 9 on the connecting ring 802 exceed 1.5MPa to complete the sealing. A good seal is achieved because the diameter of the outer side of the connecting ring 802 gradually decreases from the center to both sides, and the diameter of the inner side of the open ring 9 also gradually decreases from the center to both sides. This results in a small contact area between the inner side of the open ring 9 and the outer side of the connecting ring 802, reducing the friction between them. This facilitates the open ring 9 pressing against the outer side of the connecting ring 802, causing the connecting ring 802 to extend to the left and right sides when the open ring 9 presses against it. Once the right side of the sealing ring 803 is inserted into the left side of the ball 2, the operator no longer needs to rotate the rotating sleeve 13, and the sealing process for the ball 2 is complete. Due to the stepped shape of the left side of the ball 2, the contact area between the left sealing ring 803 and the left side of the ball 2 increases, thereby increasing the sealing performance between the left sealing ring 803 and the left side of the ball 2.

[0032] During the use of this shut-off valve, because the locking block 202 is locked in the slot on the right side of the guide block 14, the connecting rod 201 and the ball 2 cannot rotate. After the seals on the left and right sides of the ball 2 are released, that is, after the guide block 14 moves upward, the locking block 202 is no longer limited by the slot on the right side of the guide block 14. The locking block 202 is located in the annular groove of the guide block 14, and the locking block 202 can rotate normally. This prevents the operator from forgetting to release the seals on the left and right sides of the ball 2 before opening or closing this shut-off valve, which would make it difficult for the ball 2 to rotate and cause friction between the ball 2 and the two sealing rings 803. When the ball 2 rotates 90° counterclockwise, the guide block 14 moves upward, causing the locking block 202 to lock in the slot on the rear side of the guide block 14.

[0033] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments.

Claims

1. A self-compensating intelligent shut-off valve, characterized in that: The device includes a valve body (1), a ball (2) rotatably connected inside the valve body (1), an inlet and an outlet, a valve stem (3) rotatably connected to the upper side of the ball (2), a rotating rod (4) rotatably connected to the upper side of the valve body (1) and perpendicular to the valve stem (3), a first cavity (101) on the upper side of the valve body (1), and a power module driving the rotating rod (4) and the valve stem (3). The power module of the rotating rod (4) is located in the first cavity (101). Inside the valve body (1), a limiting sleeve (5) is fixedly connected to the upper side. The valve stem (3) is slidably connected to a plug rod (6). A spring is provided between the plug rod (6) and the valve stem (3). The limiting sleeve (5) is provided with two limiting grooves (501) that deflect 90° relative to the limiting sleeve (5). The limiting sleeve (5) is provided with an annular groove (502) that communicates with both limiting grooves (501). The plug rod (6) is fixedly connected to a limiting post (7) that slides in the limiting groove (501) and the annular groove (502).

2. A self-compensating intelligent shut-off valve according to claim 1, characterized in that: The transmission ratio between the rotating rod (4) and the valve stem (3) is between 3:1 and 5:

1.

3. A self-compensating intelligent shut-off valve according to claim 1, characterized in that: The upper width of the limiting groove (501) is equal to the diameter of the limiting post (7), and the width of the limiting groove (501) gradually increases from the middle downwards.

4. A self-compensating intelligent shut-off valve according to claim 1, characterized in that: The valve body (1) is fixed with symmetrically distributed fixing rings (801). A connecting ring (802) is fixed to the side of the fixing ring (801) near the ball (2). The connecting ring (802) is made of rubber. A sealing ring (803) is fixed to the side of the connecting ring (802) near the ball (2). The symmetrically distributed sealing rings (803) are used to seal the ball (2) and the valve body (1).

5. A self-compensating intelligent shut-off valve according to claim 4, characterized in that: The shape of the ball (2) near the liquid inlet of the valve body (1) is set as a stepped shape, and the sealing ring (803) near the liquid inlet of the valve body (1) is used to seal the stepped part of the ball (2).

6. A self-compensating intelligent shut-off valve according to claim 5, characterized in that: The valve body (1) is provided with symmetrically distributed open rings (9), which are located on the outside of and in contact with the adjacent connecting ring (802). The opening of the open ring (9) is fixed with symmetrically distributed fixed rods (10). The valve body (1) is provided with a second cavity (102) on the lower side. The second cavity (102) of the valve body (1) is hinged with symmetrically distributed swing rods (11) near the opening ring (9). The swing rods (11) correspond one-to-one with the fixed rods (10). The swing rods (11) are used to squeeze the corresponding fixed rods (10). The swing rods (11) are hinged with guide rods (12). The valve body (1) is provided with a locking assembly on the lower side. The locking assembly is used to move the guide rods (12).

7. A self-compensating intelligent shut-off valve according to claim 6, characterized in that: The diameter of the outer side of the connecting ring (802) gradually decreases from the middle to both sides, and the diameter of the inner side of the open ring (9) gradually decreases from the middle to both sides.

8. A self-compensating intelligent shut-off valve according to claim 6, characterized in that: The locking assembly includes a rotating sleeve (13), which is rotatably connected to the lower side of the valve body (1). The ball (2) is fixedly connected to a connecting rod (201) that is rotatably connected to the rotating sleeve (13). A guide block (14) located in the second cavity (102) is slidably connected to the lower side of the valve body (1). The guide block (14) is threadedly connected to the rotating sleeve (13). Symmetrically distributed guide grooves are provided on both sides of the guide block (14). The guide rod (12) slides in the guide groove of the adjacent guide block (14).

9. A self-compensating intelligent shut-off valve according to claim 8, characterized in that: The distance between the guide grooves on the same side of the guide block (14) remains consistent from the top to the middle, and the distance between the guide grooves on the same side of the guide block (14) gradually moves away from the middle to the bottom.

10. A self-compensating intelligent shut-off valve according to claim 6, characterized in that: The connecting rod (201) is fixedly connected to a locking block (202), and the locking block (202) is slidably connected to the guide block (14). The guide block (14) is used to limit the locking block (202).

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