A flow control valve

Abstract

The present invention relates to the technical field of valves, and in particular to a flow control valve, in which the movement mode of a valve plate is set to a two-stage movement of rotation and translation, so that the valve plate will not rub against other components during the process of rotating to adjust the flow, thereby completely avoiding the problem of sealing surface wear, thereby avoiding the problem of low sealing when the valve plate is closed; a flow control valve, including a connecting block, a movable block, a valve plate, a spring, a motor, a linkage rod, a ring and a drive assembly; a connecting block is fixedly connected to the valve stem; a movable block is slidably connected to the connecting block; a valve plate is fixedly connected to the movable block; a plurality of springs are fixedly connected to the valve plate, and the spring is fixedly connected to the connecting block; a drive assembly is connected to the valve body; a motor is connected to the drive assembly; a linkage rod is fixedly connected to the output shaft of the motor, the linkage rod is rotatably connected to the valve stem, and the linkage rod contacts the movable block; the cross-section of the linkage rod corresponding to the movable block is cam-shaped.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and more particularly to a flow control valve. Background Art

[0002] When the existing butterfly valve rotates the valve plate to adjust the flow, the valve plate needs to be rotated frequently. During this process, the valve plate will rub against the valve body. After long-term use, the sealing surfaces of the valve plate and the valve body will wear, which will lead to a decrease in the sealing performance of the butterfly valve after closing. The existing eccentric butterfly valve will be provided with an annular valve seat on the valve body, and the valve seat and the valve plate will cooperate with each other to perform a sealing operation. During the opening and closing process of this butterfly valve, the friction area between the valve plate and the valve body can be greatly reduced, thereby reducing wear. However, in the initial stage of closing and opening of this butterfly valve, the valve seat will rub against the valve body, that is, this type of butterfly valve cannot completely avoid the problem of sealing surface wear. Summary of the Invention

[0003] In order to overcome the disadvantage that the sealing surfaces of the valve plate and the valve body may wear out during the flow regulation process of the existing butterfly valve, the present invention provides a flow control valve.

[0004] The technical solution is as follows:

[0005] A flow control valve comprises a valve body and a valve stem; the valve stem is rotatably connected to the valve body; it also comprises a connecting block, a movable block, a valve plate, a spring, a motor, a linkage rod, a ring and a drive assembly; a connecting block is fixedly connected to the valve stem, and the connecting block is located in the valve body; the movable block is slidably connected to the connecting block; the valve plate is fixedly connected to the movable block; the valve plate is slidably connected to the connecting block, and a plurality of springs are fixedly connected to the valve plate, and the spring is fixedly connected to the connecting block; the valve body is connected to a drive assembly, and the drive assembly is used to drive the valve stem to rotate; the drive assembly is connected to a motor; a linkage rod is fixedly connected to the output shaft of the motor, the linkage rod is rotatably connected to the valve stem, and the linkage rod is in contact with the movable block; the cross-section of the linkage rod corresponding to the movable block is cam-shaped; a ring is fixedly connected to the valve body; a sealing ring is provided on the ring.

[0006] Furthermore, the drive assembly includes a reduction gear box and motor 2; the reduction gear box is fixedly connected to the valve body, and the reduction gear box is connected to the valve stem; the reduction gear box is connected to motor 2; and motor 1 is fixedly mounted on the reduction gear box housing.

[0007] Furthermore, it also includes a protection component; the protection component is connected to the connecting block; the protection component includes a round rod and a linkage unit; the connecting block is slidably connected to the round rod; the valve body is connected to the linkage unit, and the linkage unit is used to control the round rod to move up and down; a fixing hole is opened on the movable block.

[0008] Furthermore, the linkage unit includes a linkage ring, a connecting block 2 and a spring 2; the linkage ring is fixedly connected to the valve body; a groove 1 is provided on the linkage ring; a groove 2 is provided on the linkage ring, the groove 2 is connected to the groove 1, and the intersection position of the groove 1 and the groove 2 is set as an inclined plane; the connecting block 2 is fixedly connected to the round rod 1; the spring 2 is fixedly connected to the connecting block 2, and the spring 2 is fixedly connected to the connecting block 1.

[0009] Furthermore, a chamfer is provided on a lower end of the round rod.

[0010] Furthermore, the upper opening of the fixing hole is chamfered.

[0011] Furthermore, it also includes an auxiliary component; the auxiliary component is connected to the round rod one; the auxiliary component includes the round rod two and the spring three; the round rod one is slidingly connected to the round rod two; the spring three is fixedly connected to the round rod two, and the spring three is fixedly connected to the round rod one.

[0012] Furthermore, the movable block is magnetic.

[0013] Furthermore, the top of the second round rod is set to be a spherical surface.

[0014] Furthermore, the surface and inner wall of the valve body are coated with an anti-corrosion layer.

[0015] The beneficial effects of the present invention are:

[0016] First, set the second motor as a servo motor, and cooperate with the reduction gearbox to accurately control the opening angle of the valve plate. Since the servo motor is a closed-loop control, the accuracy is greatly guaranteed and the valve plate can be controlled within 1°. Compared with the common flow control valves on the current market, it retains the advantage of large torque and can accurately control the flow. At the same time, the movement mode of the valve plate is set to a two-stage movement of rotation and translation, so that the valve plate will not rub against other components during the process of rotating to adjust the flow, thereby completely avoiding the problem of sealing surface wear and thus avoiding the problem of low sealing performance of the valve plate when closing;

[0017] Second, the valve plate is locked on the connecting block 1 by the round rod 1, so that the high-pressure fluid cannot drive the valve plate to move, thereby avoiding the problem of the valve plate hitting the ring at high frequency due to the sudden increase and unstable change of fluid pressure in the external pipeline system, thereby avoiding damage to the valve plate and the ring that affects the sealing performance. At the same time, the rotational force when the valve plate is opened is used to drive the round rod 1 for locking operation, without the need to set up an additional electric drive component to control the round rod 1, making the structure of the butterfly valve more compact and stable;

[0018] Third, the cooperation between the round rod 2 and the spring avoids the problem of the round rod 1 blocking the valve disc and preventing it from opening due to a sudden increase in fluid at the initial stage of valve disc opening;

[0019] Fourth, the magnetic force between the movable block and the linkage rod cooperates with the spring to counteract the impact force of the fluid on the valve plate, thereby reducing the probability of the valve plate being moved by the impact of the high-pressure fluid, thereby reducing the probability of the above-mentioned collision and jamming phenomena. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shows a schematic structural diagram of the flow control valve of the present invention;

[0021] Figure 2 shows a cross-sectional view of a flow control valve of the present invention;

[0022] Figure 3 Shows a schematic structural diagram of the linkage rod of the present invention;

[0023] Figure 4 Shows a schematic structural diagram of the protection assembly of the present invention;

[0024] Figure 5 The present invention is shown Figure 4 Enlarged view of point A in the middle;

[0025] Figure 6 Shows a schematic structural diagram of the linkage ring of the present invention;

[0026] Figure 7 The figure shows the operating state of the valve plate of the present invention.

[0027] Markings in the accompanying drawings: 1-valve body, 2-valve stem, 3-connecting block 1, 4-movable block, 5-valve plate, 6-spring 1, 7-motor 1, 8-linking rod, 9-ring, 10-reduction gearbox, 11-motor 2, 12-round rod 1, 13-linking ring, 14-connecting block 2, 15-spring 2, 16-round rod 2, 17-spring 3, 92-fixing hole, 93-groove 1, 94-groove 2. DETAILED DESCRIPTION

[0028] The following description is merely a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0029] Example 1

[0030] A flow control valve, such as Figure 1-Figure 3 and Figure 7As shown, it includes a valve body 1 and a valve stem 2; the valve body 1 is rotatably connected to the valve stem 2; it also includes a connecting block 3, a movable block 4, a valve plate 5, a spring 6, a motor 7, a linkage rod 8, a ring 9 and a drive assembly; the valve stem 2 is fixedly connected to the connecting block 3, the connecting block 3 is located in the valve body 1, and the connecting block 3 is set to an alloy material; the connecting block 3 is slidably connected to the movable block 4; the movable block 4 is bolted to the valve plate 5; the valve plate 5 is slidably connected to the connecting block 3, and two Spring 16, spring 16 is fixedly connected to connecting block 13; a driving assembly is connected to the valve body 1; a motor 17 is connected to the driving assembly; a linkage rod 8 is fixedly connected to the output shaft of the motor 7, the linkage rod 8 is rotatably connected to the valve stem 2, and the linkage rod 8 is in contact with the movable block 4; the cross-section of the linkage rod 8 corresponding to the movable block 4 is cam-shaped; a circular ring 9 is fixedly connected to the valve body 1; a sealing ring is provided on the circular ring 9, and after the valve plate 5 contacts the circular ring 9, the gap between the valve plate 5 and the circular ring 9 is sealed by the sealing ring.

[0031] The driving assembly includes a reduction gearbox 10 and a motor 2 11; the reduction gearbox 10 is bolted to the valve body 1, and the reduction gearbox 10 is connected to the valve stem 2; the reduction gearbox 10 is connected to the motor 2 11, and the motor 2 11 is decelerated by the reduction gearbox 10; the motor 1 7 is fixedly mounted on the outer casing of the reduction gearbox 10, and at this time the reduction gearbox 10 only serves to fix the motor 1 7.

[0032] First, the valve body 1 is connected to the external pipeline system. In the initial state, the present invention is as follows Figure 7 As shown, spring 1 6 is in a stretched state. When the flow needs to be adjusted, motor 1 7 and motor 2 11 are started. First, motor 1 7 drives linkage rod 8 to rotate, so that the concave part of linkage rod 8 is opposite to movable block 4. At this time, spring 1 6 drives movable block 4 and valve plate 5 away from ring 9. Figure 2 As shown, the motor 2 11 then drives the valve stem 2 to rotate through the reduction gear 10, and the motor 1 7 continues to drive the linkage rod 8 to rotate. At this time, the linkage rod 8 and the valve stem 2 rotate synchronously, the valve stem 2 drives the connecting block 1 3 to rotate, the connecting block 1 3 drives the movable block 4 to rotate, and the movable block 4 drives the valve plate 5 to rotate, and the angle of the valve plate 5 is adjusted. After the valve plate 5 rotates, the gap between the valve plate 5 and the valve body 1 changes, so that the flow rate of the external pipeline can be adjusted. During this process, the valve plate 5 will not rub against other parts to avoid wear. When it needs to be completely closed, the motor 2 11 controls the valve plate 5 to rotate to the position shown in the figure through the reduction gear 10. Figure 2 Then, the motor 2 11 controls the valve stem 2 to remain stationary through the reduction gear 10, and the motor 1 7 drives the linkage rod 8 to continue to rotate 180 degrees. Since the linkage rod 8 is in a cam shape at the position corresponding to the movable block 4, the linkage rod 8 pushes the movable block 4 to move to the right, and the movable block 4 drives the valve plate 5 to move to the right and stretches the spring 1 6. After the valve plate 5 moves to the right, it is pressed against the ring 9. The state at this time is as follows Figure 7As shown, the valve body 1 is isolated by cooperating with the ring 9 and the valve plate 5, thereby isolating the external pipeline and completing the closing operation. During this process, the valve plate 5 and the ring 9 will not rub against other components to avoid wear. When in use, the motor 2 11 is set to a servo motor, and the reduction box 10 is used to accurately control the opening angle of the valve plate 5. Since the servo motor is a closed-loop control, the accuracy is greatly guaranteed, and the valve plate 5 can be controlled within 1°. Compared with the common flow control valves on the current market, it retains the advantage of a larger torque and can accurately control the flow. At the same time, the movement mode of the valve plate 5 is set to a two-stage movement of rotation and translation, so that the valve plate 5 will not rub against other components during the process of rotating to adjust the flow, thereby completely avoiding the problem of wear on the sealing surface, thereby avoiding the problem of low sealing performance of the valve plate 5 when closing.

[0033] Example 2

[0034] On the basis of Example 1, Figure 4-Figure 6 As shown, it also includes a protection component; the protection component is connected to the connecting block 3; the protection component includes a round rod 12 and a linkage unit; the connecting block 3 is slidably connected to the round rod 12, and the valve plate 5 is locked to the connecting block 3 through the round rod 12; the linkage unit is connected to the valve body 1; and a fixing hole 92 is opened on the movable block 4.

[0035] The linkage unit includes a linkage ring 13, a second connecting block 14 and a second spring 15; the linkage ring 13 is fixedly connected to the valve body 1, and the linkage ring 13 is set to a wear-resistant material; a groove 1 93 is opened on the linkage ring 13; a groove 2 94 is opened on the linkage ring 13, and the groove 2 94 is connected to the groove 1 93, and the intersection position of the groove 1 93 and the groove 2 94 is set to an inclined surface; the connecting block 2 14 is fixedly connected to the round rod 12; the connecting block 2 14 is fixedly connected to the spring 2 15, and the spring 2 15 is fixedly connected to the connecting block 3.

[0036] The lower end of the round rod 12 is chamfered to make it easier for the round rod 12 to be inserted into the fixing hole 92.

[0037] The upper end opening of the fixing hole 92 is chamfered to make it easier for the round rod 12 to be inserted into the fixing hole 92.

[0038] When the valve plate 5 is in the open state, if the fluid pressure in the external pipeline system suddenly increases and tends to an unstable state, the high-pressure fluid will push the valve plate 5 to move until the valve plate 5 contacts the ring 9 and stops, and stretches the spring 16. When the fluid pressure drops, the spring 16 rebounds and drives the valve plate 5 back to its original position, so that the valve plate 5 hits the ring 9 at a high frequency during this process, causing damage to the sealing surface of the valve plate 5 and the ring 9, thereby causing the sealing performance of the valve plate 5 to decrease when it is closed. Therefore, during the opening process of the valve plate 5, the valve stem 2 drives the connecting block 13 to rotate, and the connecting block 13 drives the round rod 12 to rotate, so that the round rod 12 slides along the inclined surface at the intersection of the groove 1 93 and the groove 2 94 into the groove 2 94. During this process, the linkage ring 13 forces the round rod 12 to move downward and compresses the spring 2 15 through the connecting block 2 14, thereby The round rod 12 is inserted into the fixing hole 92, that is, the movable block 4 is fixed on the connecting block 3, thereby locking the valve plate 5 on the connecting block 3. At this time, the valve plate 5 can only rotate with the connecting block 3, that is, the valve plate 5 will not move after the high-pressure fluid hits the valve plate 5, thereby protecting the valve plate 5 and the ring 9. When in use, the valve plate 5 is locked on the connecting block 3 by the round rod 12, so that the high-pressure fluid cannot drive the valve plate 5 to move, thereby avoiding the problem of high-frequency impact of the valve plate 5 on the ring 9 caused by the sudden increase and unstable change of fluid pressure in the external pipeline system, thereby avoiding damage to the valve plate 5 and the ring 9 to affect the sealing performance. At the same time, the rotational force when the valve plate 5 is opened is used to drive the round rod 12 for locking operation, and there is no need to set an additional electric drive component to control the round rod 12, making the structure of the butterfly valve more compact and stable.

[0039] Example 3

[0040] On the basis of Example 2, Figure 4-Figure 6 As shown, it also includes an auxiliary component; the auxiliary component is connected to the round rod 12; the auxiliary component includes a round rod 2 16 and a spring 3 17; the round rod 12 is slidably connected to the round rod 2 16; the round rod 2 16 is fixedly connected to the spring 3 17, the spring 3 17 is fixedly connected to the round rod 12, and the spring 3 17 is set to an alloy material.

[0041] The movable block 4 has magnetism.

[0042] The top of the second round rod 16 is set to a spherical surface to reduce friction.

[0043] The surface and inner wall of the valve body 1 are coated with an anti-corrosion layer to prevent rust.

[0044] If the fluid pressure in the external piping system suddenly increases at the initial stage of valve plate 5 opening, the high-pressure fluid will drive valve plate 5 to move, and valve plate 5 will drive movable block 4 to move, causing the fixing hole 92 on movable block 4 to be misaligned with round rod 12, thereby causing round rod 12 to lose the space for downward movement, and further causing round rod 12 to be unable to slide into groove 2 94. At this time, linkage ring 13 blocks the movement of round rod 12, round rod 12 blocks the movement of connecting block 3, and connecting block 3 blocks the movement of movable block 4 and valve plate 5. , which causes the valve plate 5 to be stuck and unable to continue to open. Therefore, a round rod 2 16 that can move up and down is set on the round rod 12. When the fixing hole 92 on the movable block 4 is misaligned with the round rod 12, the valve stem 2 drives the connecting block 1 3 to rotate, and the connecting block 1 3 drives the round rod 12 and the parts thereon to rotate, so that the round rod 2 16 slides into the groove 2 94 along the inclined surface at the intersection of the groove 1 93 and the groove 2 94. In this process, the linkage ring 13 forces the round rod 2 16 to move downward and compresses the spring 3 17. That is, the linkage ring 13 will not block the movement of the round rod 12, the round rod 12 will not block the movement of the connecting block 3, and the connecting block 3 will not block the movement of the movable block 4 and the valve plate 5, so that the valve plate 5 can be opened smoothly. In a normal fluid pressure environment, when the fluid pressure acts on the opened valve plate 5, the fluid pressure is not enough to push the valve plate 5 to move, that is, the normal fluid pressure is not enough to stretch the spring 6. When the fluid pressure in the external pipeline system returns to a normal state, the spring 6 can overcome the fluid pressure and rebound to its original state. , and drives the valve plate 5 to move back to its original position. The valve plate 5 drives the movable block 4 to move back to its original position, so that the fixing hole 92 on the movable block 4 is realigned with the round rod 12. Then the spring three 17 rebounds and drives the round rod 12 to move downward, so that the round rod 12 is inserted into the fixing hole 92, thereby locking the valve plate 5 on the connecting block 3. During use, the cooperation between the round rod 2 16 and the spring three 17 avoids the problem that the round rod 12 will jam the valve plate 5 and prevent it from opening due to the sudden increase of fluid in the initial stage of opening of the valve plate 5.

[0045] In addition, the movable block 4 is set to a magnetic material, and a magnetic force can be generated between the movable block 4 and the linkage rod 8. The magnetic force cooperates with the spring 1 6 to jointly counteract the impact force of the fluid on the valve plate 5, thereby reducing the probability of the valve plate 5 being moved by the impact of the high-pressure fluid, thereby reducing the probability of the above-mentioned collision and jamming phenomena.

[0046] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A flow control valve, comprising a valve body (1); a valve stem (2) rotatably connected to the valve body (1); characterized in that: The valve body (1) further comprises a connecting block (3), a movable block (4), a valve plate (5), a spring (6), a motor (7), a linkage rod (8), a ring (9) and a drive assembly; the valve stem (2) is fixedly connected to the connecting block (3), and the connecting block (3) is located in the valve body (1); the connecting block (3) is slidably connected to the movable block (4); the movable block (4) is fixedly connected to the valve plate (5); the valve plate (5) is slidably connected to the connecting block (3), and a plurality of springs (6) are fixedly connected to the valve plate (5). Spring 1 (6) is fixedly connected to connecting block 1 (3); a driving assembly is connected to the valve body (1), and the driving assembly is used to drive the valve stem (2) to rotate; a motor 1 (7) is connected to the driving assembly; a linkage rod (8) is fixedly connected to the output shaft of the motor 1 (7), the linkage rod (8) is rotationally connected to the valve stem (2), and the linkage rod (8) is in contact with the movable block (4); the cross section of the linkage rod (8) corresponding to the movable block (4) is cam-shaped; a circular ring (9) is fixedly connected to the valve body (1); and a sealing ring is provided on the circular ring (9); The driving assembly comprises a reduction box (10); the reduction box (10) is fixedly connected to the valve body (1), and the reduction box (10) is connected to the valve stem (2); the reduction box (10) is connected to a second motor (11); and the first motor (7) is fixedly mounted on the outer shell of the reduction box (10).

2. A flow control valve according to claim 1, characterized in that: The valve body (1) also includes a protection component; the protection component is connected to the connecting block (3); the protection component includes a round rod (12); the connecting block (3) is slidably connected to the round rod (12); the valve body (1) is connected to a linkage unit, the linkage unit is used to control the round rod (12) to move up and down; and the movable block (4) is provided with a fixing hole (92).

3. A flow control valve according to claim 2, characterized in that: The linkage unit comprises a linkage ring (13); the linkage ring (13) is fixedly connected to the valve body (1); a groove 1 (93) is provided on the linkage ring (13); a groove 2 (94) is provided on the linkage ring (13), the groove 2 (94) is communicated with the groove 1 (93), and the intersection position between the groove 1 (93) and the groove 2 (94) is set as an inclined surface; a connecting block 2 (14) is fixedly connected to the round rod 1 (12); a spring 2 (15) is fixedly connected to the connecting block 2 (14), and the spring 2 (15) is fixedly connected to the connecting block 1 (3).

4. A flow control valve according to claim 3, characterized in that: The lower end of the round rod (12) is chamfered.

5. A flow control valve according to claim 3, characterized in that: The upper opening of the fixing hole (92) is chamfered.

6. A flow control valve according to claim 5, characterized in that: The auxiliary component is also included; the auxiliary component is connected to the round rod one (12); the auxiliary component includes the round rod two (16); the round rod one (12) is slidably connected to the round rod two (16); the round rod two (16) is fixedly connected to the spring three (17), and the spring three (17) is fixedly connected to the round rod one (12).

7. A flow control valve according to claim 6, characterized in that: The movable block (4) is magnetic.

8. A flow control valve according to claim 6, characterized in that: The top of the second round rod (16) is set to be a spherical surface.

9. A flow control valve according to claim 1, characterized in that: The surface and inner wall of the valve body (1) are coated with an anti-corrosion layer.

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