Position control butterfly valve

Abstract

The utility model relates to a position control butterfly valve which comprises a valve body, a valve rod rotationally arranged on the valve body, a valve seat arranged on the valve body and a valve clack fixed to the valve rod, and the valve clack is located in the valve seat. A servo control assembly used for accurately controlling the rotating angle of the valve rod is arranged on the supporting seat, and a positioning detection assembly used for detecting the rotating position of the valve clack is arranged on the valve seat. The rotating angle of the valve rod is precisely controlled through the servo control assembly, so that precise control over the rotating angle of the valve clack is achieved, then the position of the valve clack is detected in real time through the positioning detection assembly, precise adjustment of opening or closing of the valve clack is achieved, and then the effect of high-precision control over rotation of the valve clack is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of butterfly valves, and in particular to a position-controlled butterfly valve. Background Art

[0002] The butterfly valve, also known as the flap valve, is a simple regulating valve that can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays a role of cutting off and throttling in the pipeline. The butterfly valve opening and closing part is a disc-shaped valve disc that rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating.

[0003] The butterfly valves currently on the market are generally divided into two types, one is a butterfly valve that opens and closes by manually adjusting the valve disc, and the other is a butterfly valve that opens and closes by electromagnetically controlling the valve disc. The valve disc opening and closing positions of the above two types of butterfly valves are usually positioned by structure, that is, after the valve disc rotates to the open or closed position, the corresponding structure is set in the valve body to limit the rotation of the valve disc, thereby achieving control over the opening and closing of the valve disc.

[0004] However, in actual use, both of the above butterfly valves cannot achieve high-precision control of the valve disc rotation during the process of rapidly driving the valve disc to rotate, so that the valve disc can return to the origin more accurately. Utility Model Content

[0005] In order to achieve the purpose of controlling the rotation of the valve disc with high precision while driving the valve disc to rotate quickly so that the valve disc can return to the origin more accurately, the present application provides a position-controlled butterfly valve.

[0006] The present application provides a position control butterfly valve, which adopts the following technical solution:

[0007] A position-controlled butterfly valve comprises a valve body, a valve stem rotating on the valve body, a valve seat arranged on the valve body, and a valve disc fixed on the valve stem, wherein the valve disc is located within the valve seat, wherein a support seat is installed on the valve body, a servo control component for accurately controlling the rotation angle of the valve stem is arranged on the support seat, and a positioning detection component for detecting the rotation position of the valve disc is arranged on the valve seat.

[0008] By adopting the above technical solution, the rotation position of the valve disc is detected in real time through the positioning detection component during use, and the detection result is transmitted to the PLC device by transmitting an electrical signal. The PLC device receives and processes the electrical signal, and then drives the servo control component to accurately control the rotation angle of the valve stem, thereby realizing precise adjustment of the rotation angle of the valve disc, thereby achieving the purpose of high-precision control of the valve disc.

[0009] Preferably, the servo control assembly includes an adapter seat mounted on the support seat, and a servo motor mounted on the adapter seat, and a main shaft of the servo motor is coaxially arranged with the valve stem.

[0010] By adopting the above technical solution, an adapter is provided to facilitate the staff to install the servo motor on the valve body during use. The servo motor controls the rotation of the valve stem, thereby realizing precise adjustment of the rotation angle of the valve stem.

[0011] Preferably, a reducer is provided on the adapter, the input shaft of the reducer is coaxially fixedly connected to the main shaft of the servo motor, and the output shaft of the reducer is coaxially fixedly connected to the valve stem.

[0012] By adopting the above technical solution, the rotation speed of the main shaft of the servo motor is further reduced by the reducer during use, thereby ensuring that when the valve stem is controlled to rotate by the servo motor, the valve stem can rotate at a slower speed, thereby ensuring that the valve disc can slowly rotate to the specified position, thereby achieving precise adjustment of the valve disc rotation angle.

[0013] Preferably, a coupling is provided between the output shaft of the reducer and the valve stem, one end of the coupling is coaxially fixedly connected to the main shaft of the servo motor, and the other end of the coupling is coaxially fixedly connected to the valve stem.

[0014] By adopting the above technical solution, the valve stem and the reducer output shaft are connected together through a coupling during use, so that the reducer input shaft is driven to rotate by the rotation of the servo motor main shaft, and the rotation of the reducer input shaft is transmitted to the reducer output shaft, thereby driving the valve stem to rotate synchronously.

[0015] Preferably, the positioning detection component includes a first position sensor for detecting the position of the valve flap when the valve seat is fully open, and a second position sensor for detecting the position of the valve flap when the valve seat is fully closed, and the first position sensor and the second position sensor are both installed in the valve seat.

[0016] By adopting the above technical solution, during the rotation of the valve flap, the rotation position of the valve flap is detected in real time through the coordinated use of the first position sensor and the second position sensor, thereby assisting the servo motor to achieve precise control of the rotation angle of the valve flap, that is, when the valve flap rotates to the first position sensor, it indicates that the valve seat is open at the maximum angle, that is, when the valve flap rotates to the second position sensor, it indicates that the valve seat is completely closed.

[0017] Preferably, a sealing block is provided between the support seat and the valve body, the sealing block is provided with a through hole, and the valve stem rotates in the through hole.

[0018] By adopting the above technical solution, the sealing block is provided during use to increase the sealing performance of the interior of the valve body, thereby ensuring the use effect of the valve body.

[0019] Preferably, a ball bearing is provided between the sealing block and the valve stem to facilitate the rotation of the valve stem.

[0020] By adopting the above technical solution, a ball bearing is provided during use to reduce the friction between the valve stem and the sealing block, so that the valve stem can rotate more flexibly, thereby ensuring the accuracy of controlling the rotation angle of the valve stem.

[0021] Preferably, a buckle ring is arranged in the through hole, an annular groove is formed on the valve stem, and an end of the buckle ring abuts against an inner wall of the annular groove.

[0022] By adopting the above technical solution, the valve stem is abutted and limited by the retaining ring during use, thereby ensuring that the rotation of the valve stem is more stable without affecting the rotation accuracy of the valve stem.

[0023] Preferably, a sealing ring and a spacer ring are provided between the outer wall of the valve stem and the valve body, two sealing rings are provided, the spacer ring is located between the two sealing rings, and the spacer ring and the two sealing rings are both sleeved on the valve stem.

[0024] By adopting the above technical solution, two sealing rings and a spacer ring are used in combination to form a double-end mechanical sealing structure between the outer wall of the valve stem and the valve body, thereby ensuring that the sealing performance of the connection gap between the valve stem and the valve body is more reliable.

[0025] Preferably, the end of the valve stem is sleeved with a shaft bushing, and the shaft bushing rotates on the valve body.

[0026] By adopting the above technical solution, the rotation of the valve stem is supported and guided by the shaft bushing during use, while the friction between the valve stem and the valve body is reduced.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. When in use, the servo motor drives the input shaft of the reducer to rotate, and the reducer input shaft rotates and transmits to the output shaft, thereby driving the valve stem to rotate through the rotation of the reducer output shaft. During the rotation of the valve stem, the servo motor can achieve precise adjustment of the rotation angle or number of rotations of the valve stem. The reducer can adjust the speed of the servo motor main shaft to a certain ratio and then transmit it to the valve stem, and then the opening and closing angle of the valve disc can be accurately controlled, which is more conducive to use;

[0029] 2. When in use, the first position sensor and the second position sensor are used together to detect the rotation angle of the valve disc in real time, and the detection result is sent to the PLC device in the form of an electrical signal. The PLC device receives and processes the signal, and then sends the electrical signal to the servo motor, so that the valve disc is accurately controlled by the servo motor, so that the valve disc can return to its original position more accurately;

[0030] 3. When in use, a sealing block is arranged between the valve body and the support seat, and a sealing ring and a spacer ring are arranged between the valve body and the valve stem, thereby increasing the sealing performance of the internal structure of the butterfly valve and ensuring the use effect of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an axonometric diagram mainly showing the overall structure in the embodiment of the present application;

[0032] Figure 2 It is a cross-sectional view mainly showing the overall structure in the embodiment of the present application;

[0033] Figure 3 It is an exploded view mainly showing the valve body structure in the embodiment of the present application;

[0034] Figure 4 It is an exploded view mainly showing the connection structure between the valve body and the support seat in the embodiment of the present application;

[0035] Figure 5 It is an axonometric diagram mainly showing the connection structure between the valve stem and the buckle ring in the embodiment of the present application;

[0036] Figure 6 It is an isometric diagram mainly showing the structure of the servo control assembly in the embodiment of the present application;

[0037] Figure 7 It is a cross-sectional view mainly showing the structure of the positioning detection component in the embodiment of the present application.

[0038] Attached figures: 1. valve body; 2. valve stem; 21. ring groove; 22. mounting groove; 3. valve seat; 4. valve disc; 5. support seat; 51. avoidance hole; 6. servo control assembly; 61. adapter seat; 62. servo motor; 7. positioning detection assembly; 71. first position sensor; 72. second position sensor; 8. reducer; 9. coupling; 10. sealing block; 101. through hole; 20. ball bearing; 30. retaining ring; 40. sealing ring; 50. spacer ring; 60. shaft bushing; 70. avoidance cavity. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1 -Attached Figure 7 This application is described in further detail.

[0040] An embodiment of the present application discloses a position-controlled butterfly valve.

[0041] Reference Figure 1 and Figure 2 A position-controlled butterfly valve comprises a valve body 1, a valve stem 2, a valve seat 3 and a valve disc 4. The valve body 1 is placed horizontally, the top end of the valve stem 2 is located above the valve body 1, the bottom end of the valve stem 2 is inserted and embedded in the valve body 1, and the valve stem 2 is rotatably connected to the valve body 1. A shaft bushing 60 is sleeved on the bottom end of the valve stem 2, and the shaft bushing 60 is clamped and fixed in the valve body 1. The valve disc 4 is located in the valve seat 3, and the valve disc 4 is used to block the channel on the valve seat 3.

[0042] Reference Figure 2 and Figure 3 A mounting groove 22 is provided on the side wall of the valve stem 2, and the valve disc 4 is fixed in the mounting groove 22 by bolts. A sealing ring 40 and a spacer ring 50 are provided between the valve stem 2 and the valve body 1. Two sealing rings 40 are provided, and the spacer ring 50 is located between the two sealing rings 40. The spacer ring 50 and the two sealing rings 40 are both sleeved on the valve stem 2, and the spacer ring 50 and the two sealing rings 40 are both clamped on the valve body 1; when in use, the two sealing rings 40 and one spacer ring 50 are used in combination to form a double-end mechanical sealing structure, so that the sealing effect at the connection gap between the valve stem 2 and the valve body 1 is better.

[0043] Reference Figure 2 and Figure 4 A support seat 5 is also provided above the valve body 1, and an avoidance hole 51 is provided on the support seat 5. A sealing block 10 is provided between the support seat 5 and the valve body 1, and a through hole 101 is provided on the sealing block 10. The inner diameter of the through hole 101 is larger than the outer diameter of the valve stem 2, and the aperture of the through hole 101 is the same as the aperture of the avoidance hole 51. The sealing block 10 is sleeved on the valve stem 2, and the top end of the valve stem 2 passes through the through hole 101 and the avoidance hole 51 and is located above the support seat 5. The sealing block 10 is fixedly connected to the valve body 1 by bolts, and the support seat 5 is fixedly connected to the sealing block 10 by bolts. When in use, the support seat 5 is provided to facilitate the installation of the valve body 1, and the support seat 5 and the valve body 1 are sealed by the sealing block 10, thereby increasing the sealing effect of the overall structure of the butterfly valve.

[0044] Reference Figure 2 and Figure 5A ball bearing 20 is clamped and fixed at the bottom end of the sealing block 10, and the inner wall of the ball bearing 20 is clamped and fixed to the outer wall of the valve stem 2. A retaining ring 30 is arranged in the through hole 101. In this embodiment, the retaining ring 30 is preferably arranged as an E-type retaining ring 30, and the retaining ring 30 is fitted on the top of the ball bearing 20. An annular groove 21 is opened on the valve stem 2, and the end of the E-type retaining ring 30 abuts against the inner wall of the annular groove 21; when in use, the ball bearing 20 is arranged between the sealing block 10 and the valve stem 2 to ensure the stability of the rotation of the valve stem 2, and the E-type retaining ring 30 prevents the valve stem 2 from being misaligned with the ball bearing 20 when rotating, thereby increasing the stability of the valve stem 2 when rotating.

[0045] Reference Figure 1 and Figure 6 A servo control assembly 6 is installed on the support seat 5. The servo control assembly 6 is used to accurately control the rotation angle of the valve stem 2. The servo control assembly 6 includes an adapter seat 61 and a servo motor 62. The adapter seat 61 is fixedly connected to the support seat 5 by bolts. A avoidance cavity 70 is penetrated through the adapter seat 61. The top of the valve stem 2 is located in the avoidance cavity 70. The servo motor 62 is fixedly connected to the top of the adapter seat 61 by bolts. A reducer 8 is arranged between the main shaft of the servo motor 62 and the top of the valve stem 2. The input shaft of the reducer 8 and the main shaft of the servo motor 62 are coaxially fixedly connected. A coupling 9 is coaxially fixed on the output shaft of the reducer 8. In this embodiment, the coupling 9 is preferably set to a cross coupling 9, and the coupling 9 is coaxially fixedly connected to the valve stem 2 at one end away from the reducer 8.

[0046] Reference Figure 1 and Figure 6 When in use, the main shaft of the servo motor 62 rotates to drive the input shaft of the reducer 8 to rotate, and the input shaft of the reducer 8 rotates and is transmitted to the output shaft of the reducer 8, thereby causing the output shaft of the reducer 8 to rotate, and then driving the valve stem 2 to rotate synchronously under the action of the coupling 9. During the rotation of the valve stem 2, the rotation angle of the valve stem 2 can be accurately controlled by the servo motor 62, thereby realizing accurate adjustment of the opening and closing angle of the valve disc 4.

[0047] Reference Figure 2 and Figure 7 A positioning detection component 7 is provided on the valve seat 3. The positioning detection component 7 is used to detect the rotation position of the valve flap 4 in real time. The positioning detection component 7 includes a first position sensor 71 and a second position sensor 72. In this embodiment, the first position sensor 71 and the second position sensor 72 are preferably configured as proximity position sensors, and the first position sensor 71 and the second position sensor 72 are both installed on the valve seat 3, wherein the first position sensor 71 is used to detect the position of the valve flap 4 when it is fully opened, and the second position sensor 72 is used to detect the position of the valve flap 4 after it is fully closed.

[0048] Reference Figure 2and Figure 7 It should be noted that before installation, the first position sensor 71 and the second position sensor 72 need to be leveled in advance for the valve flap 4 to ensure that the open state and the closed state of the valve flap 4 are at the limit values, so as to ensure the accuracy of the subsequent detection results of the valve flap 4 by the first position sensor 71 and the second position sensor 72, thereby achieving more accurate position detection and control of the valve flap 4 during rotation.

[0049] The implementation principle of the embodiment of the present application is as follows: when in use, the valve body 1 is installed at the specified position through the support seat 5, and then the valve stem 2 can be driven to rotate by the main shaft rotation of the servo motor 62, and the rotation speed of the valve stem 2 is reduced by the reducer 8, so as to control the valve flap 4 to rotate at a slower speed, and then the rotation position of the valve flap 4 can be actually detected by the first position sensor 71 and the second position sensor 72, and the detection result is transmitted to the PLC device in the form of an electrical signal. After receiving and processing the electrical signal, the PLC device feeds back the electrical signal to the servo motor 62, so as to realize the precise adjustment of the rotation angle of the valve flap 4 through the servo motor 62, and then realize the high-precision control of the rotation of the valve flap 4 under the premise of quickly driving the valve flap 4 to rotate, so that the valve flap 4 can be more accurately rotated to the specified position, which is more conducive to use.

[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. A position-controlled butterfly valve, comprising a valve body (1), a valve stem (2) rotating on the valve body (1), a valve seat (3) arranged on the valve body (1), and a valve flap (4) fixed on the valve stem (2), wherein the valve flap (4) is located in the valve seat (3), and is characterized in that: A support seat (5) is installed on the valve body (1), and a servo control component (6) for accurately controlling the rotation angle of the valve stem (2) is arranged on the support seat (5), and a positioning detection component (7) for detecting the rotation position of the valve flap (4) is arranged on the valve seat (3).

2. A position-controlled butterfly valve according to claim 1, characterized in that: The servo control assembly (6) comprises an adapter seat (61) mounted on the support seat (5), and a servo motor (62) mounted on the adapter seat (61), wherein the main shaft of the servo motor (62) is coaxially arranged with the valve stem (2).

3. A position-controlled butterfly valve according to claim 2, characterized in that: A reducer (8) is arranged on the adapter seat (61), the input shaft of the reducer (8) is coaxially fixedly connected to the main shaft of the servo motor (62), and the output shaft of the reducer (8) is coaxially fixedly connected to the valve stem (2).

4. A position-controlled butterfly valve according to claim 3, characterized in that: A coupling (9) is provided between the output shaft of the reducer (8) and the valve stem (2); one end of the coupling (9) is coaxially fixedly connected to the main shaft of the servo motor (62), and the other end of the coupling (9) is coaxially fixedly connected to the valve stem (2).

5. A position-controlled butterfly valve according to claim 1, characterized in that: The positioning detection component (7) comprises a first position sensor (71) for detecting the position of the valve flap (4) when the valve seat (3) is fully open, and a second position sensor (72) for detecting the position of the valve flap (4) when the valve seat (3) is fully closed. The first position sensor (71) and the second position sensor (72) are both installed in the valve seat (3).

6. A position-controlled butterfly valve according to claim 1, characterized in that: A sealing block (10) is provided between the support seat (5) and the valve body (1), a through hole (101) is provided on the sealing block (10), and the valve stem (2) rotates in the through hole (101).

7. A position-controlled butterfly valve according to claim 6, characterized in that: A ball bearing (20) is arranged between the sealing block (10) and the valve stem (2) to facilitate the rotation of the valve stem (2).

8. A position-controlled butterfly valve according to claim 6, characterized in that: A buckle ring (30) is arranged in the through hole (101), an annular groove (21) is provided on the valve stem (2), and the end of the buckle ring (30) abuts against the inner wall of the annular groove (21).

9. A position-controlled butterfly valve according to claim 1, characterized in that: A sealing ring (40) and a spacer ring (50) are provided between the outer wall of the valve stem (2) and the valve body (1); two sealing rings (40) are provided, and the spacer ring (50) is located between the two sealing rings (40); the spacer ring (50) and the two sealing rings (40) are both sleeved on the valve stem (2).

10. A position-controlled butterfly valve according to claim 1, characterized in that: The end of the valve stem (2) is sleeved with a shaft bushing (60), and the shaft bushing (60) rotates on the valve body (1).

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