Semi-ball valve

Abstract

The invention belongs to the technical field of valves, and particularly relates to a semi-ball valve which comprises a valve body, an inlet and an outlet, a valve clack is eccentrically and rotatably arranged in the valve body through a middle shaft, and an equipment box is fixedly assembled on the valve body through a fixing bolt. A transmission mechanism used for driving the valve clack to rotate and a fixing mechanism used for fixing the angle position of the valve clack are arranged in the equipment box through partition plates, the transmission mechanism comprises a magnetofluid cavity filled with magnetofluid and an assembling cavity located on the peripheral side of the magnetofluid cavity, and the top end of the equipment box is fixed through fixing bolts and provided with a top cover in a sealed mode. The top end of the middle shaft extends to the top cover and is rotationally connected with the top cover through a rotating seat, paddles are arranged on the periphery, located in the magnetofluid cavity, of the middle shaft at equal intervals, and a plurality of first electromagnets used for providing a magnetic field for magnetofluid are fixedly assembled in the assembly cavity in an annular array mode. And the method has greater application potential in occasions requiring a low-noise environment.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, in particular to a hemispherical valve. Background Art

[0002] The hemispherical valve is a special valve with a hemispherical ball. It is mainly used to solve the problem of conveying two-phase mixed flow media. The hemispherical valve is characterized by simple structure, easy switching, reliable sealing, small fluid resistance, and the ability to withstand high pressure. It is widely used in chemical, petrochemical, pharmaceutical, water supply and drainage, municipal environmental protection and other industries.

[0003] The existing hemispherical valve is mainly composed of parts such as valve body, valve cover, hemispherical ball, valve stem and valve seat. Its working principle is to drive the ball to rotate by rotating the valve stem, so that a sealing surface is formed or disconnected between the ball and the valve seat, thereby controlling the flow of the fluid. The hemispherical valve has various operating modes, including manual, electric and pneumatic, which are suitable for different working conditions.

[0004] The following disadvantages exist in the existing technology of hemispherical valves: due to the limitation of mechanical transmission structure, the traditional hemispherical valve has a slow response speed and cannot meet the rapidly changing working requirements. The traditional machinery needs to add grease frequently to prevent failure caused by wear and tear, and the maintenance cost is high. At the same time, the traditional mechanical transmission noise is relatively large and is not suitable for use in a low-noise environment. Therefore, a hemispherical valve is proposed to address the above problems. Summary of the invention

[0005] In order to make up for the shortcomings of existing hemispherical valves, a hemispherical valve is proposed to solve the problems that traditional hemispherical valves have slow response speed due to the limitations of mechanical transmission structure and cannot meet rapidly changing work needs. Traditional machinery needs to add grease frequently to prevent wear and failure, and the maintenance cost is high. At the same time, traditional mechanical transmission noise is large and is not suitable for use in a low-noise environment.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a hemispherical valve described in the present invention includes a valve body, an inlet, and an outlet, a valve disc is arranged in the valve body through eccentric rotation of the central axis, a device box is fixedly assembled on the valve body through fixing bolts, a transmission mechanism for driving the valve disc to rotate and a fixing mechanism for fixing the angular position of the valve disc are respectively arranged in the device box through partitions, the transmission mechanism includes a magnetic fluid chamber filled with magnetic fluid, and an assembly cavity located on the peripheral side of the magnetic fluid chamber, the top end of the device box is fixed by fixing bolts and a top cover is sealed, the top end of the central axis extends to the top cover and is rotatably connected to the top cover through a rotating seat, paddles are equidistantly arranged on the peripheral side of the central axis located in the magnetic fluid chamber, and a plurality of first electromagnets for providing a magnetic field for the magnetic fluid are fixedly assembled in a circular array in the assembly cavity.

[0007] Preferably, the fixing mechanism includes an installation cavity, in which an array of clamping mechanisms are equidistantly arranged on the circumferential side of the central axis in the installation cavity, the clamping mechanism includes a movable clamping block, a tooth groove is provided on the circumferential side of the central axis located in the installation cavity, one side of the clamping block is provided with teeth that cooperate with and lock with the tooth groove, one side of the clamping block is provided with a compression spring for keeping the teeth always engaged with the tooth groove, one side of the clamping block is provided with a permanent magnet, and a second electromagnet is provided at a position opposite to the inner wall of the installation cavity and the permanent magnet.

[0008] Preferably, the number of teeth in the tooth groove matches the number of teeth on the clamping block to achieve a good locking effect.

[0009] Preferably, a guide structure for guiding the clamping block is provided in the installation cavity, and the guide structure includes a guide groove opened in the installation cavity and a guide rod fixedly provided on the clamping block, and the guide rod extends into the guide groove.

[0010] Preferably, a roller is rotatably mounted on the matching surface of the guide rod and the guide groove.

[0011] Preferably, the top cover is equipped with a rotary encoder for monitoring the rotation angle of the central axis, the rotating shaft of the rotary encoder is provided with a slot, the central axis is provided with a docking groove for the rotating shaft to be inserted into, and the docking groove is provided with a protrusion that cooperates with the slot.

[0012] Preferably, an annular shell is fixedly provided in the valve body at the outlet, a sealing ring is movably provided in the annular shell, one end of the sealing ring extends to the outside of the annular shell, a piston ring is fixedly provided at one end of the sealing ring located inside the annular shell, and a gas tank is provided on the valve body, and the gas tank is connected to the inside of the annular shell through an air pipe.

[0013] Preferably, a controller is fixedly mounted on the top cover, and the controller is used to receive data sent by the rotary encoder and also to control the power on and off of the first electromagnet and the second electromagnet.

[0014] Preferably, the controller has a built-in network control terminal for user mobile terminal control.

[0015] Beneficial effects of the present invention:

[0016] 1. The transmission mechanism of the present invention uses the magnetic field of magnetic fluid to drive the valve flap to open, realizing contactless transmission. This feature greatly reduces the wear and friction caused by contact in the traditional mechanical transmission mechanism, thereby extending the service life of the equipment and reducing maintenance costs;

[0017] 2. The transmission mechanism uses the magnetic field of magnetic fluid, and the noise generated during operation is extremely low, which is mainly due to its contactless transmission characteristics. This advantage makes the hemispherical valve have greater application potential in occasions that require a low-noise environment;

[0018] 3. Compared with the traditional mechanical transmission mechanism, the transmission mechanism of the present invention has a simpler structure and is therefore easier to maintain and service, which reduces the maintenance cost of the equipment and improves the reliability and stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 is a cross-sectional view of the internal structure of the present invention;

[0021] Figure 2 It is a cross-sectional top view of the transmission mechanism;

[0022] Figure 3 yes Figure 1 A magnified view of the structure at center A;

[0023] Figure 4 It is a structural cross-sectional view of the docking cooperation between the central shaft and the rotating shaft;

[0024] Figure 5 yes Figure 1 A magnified view of the structure at B in the middle;

[0025] Legend:

[0026] 1. Valve body; 2. Inlet; 3. Outlet; 4. Central axis; 401. Tooth groove; 402. Docking groove; 4021. Bump; 5. Valve flap; 6. Equipment box; 601. Top cover; 7. Transmission mechanism; 701. Magnetic fluid chamber; 7011. Paddle; 702. Assembly cavity; 7021. First electromagnet; 8. Fixing mechanism; 801. Installation cavity; 802. Clamping mechanism; 8021. Clamping block; 80211. Tooth; 80212. Permanent magnet; 8022. Compression spring; 8023. Second electromagnet; 803. Guide structure; 8031. Guide groove; 8032. Guide rod; 80321. Roller; 9. Rotary encoder; 901. Rotating shaft; 902. Slot; 10. Ring housing; 11. Sealing ring; 12. Piston ring; 13. Gas tank; 14. Air pipe; 15. Controller. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Specific examples are given below.

[0029] See also Figure 1-Figure 5 A hemispherical valve according to the present invention comprises a valve body 1, an inlet 2 and an outlet 3, wherein a valve flap 5 is eccentrically rotated by a central axis 4 in the valve body 1, a device box 6 is fixedly assembled on the valve body 1 by fixing bolts, a transmission mechanism 7 for driving the valve flap 5 to rotate and a fixing mechanism 8 for fixing the angle position of the valve flap 5 are respectively arranged in the device box 6 through a partition, the transmission mechanism 7 comprises a magnetic fluid chamber 701 filled with magnetic fluid, and an assembly chamber 702 located on the peripheral side of the magnetic fluid chamber 701, the top end of the device box 6 is fixed by fixing bolts and a top cover 601 is sealed, the top end of the central axis 4 extends to the top cover 601 and is rotatably connected thereto through a rotating seat, paddles 7011 are equidistantly arranged on the peripheral side of the central axis 4 located at the position of the magnetic fluid chamber 701, and a plurality of first electromagnets 7021 for providing a magnetic field for the magnetic fluid are fixedly assembled in a circular array in the assembly chamber 702;

[0030] The top cover 601 is equipped with a rotary encoder 9 for monitoring the rotation angle of the central axis 4, the rotating shaft 901 of the rotary encoder 9 is provided with a slot 902, the central axis 4 is provided with a docking slot 402 for the rotating shaft 901 to be inserted, the docking slot 402 is provided with a convex block 4021 that is plugged with the slot 902, the top cover 601 is fixedly equipped with a controller 15, the controller 15 is used to receive data sent by the rotary encoder 9, and is also used to control the power on and off of the first electromagnet 7021 and the second electromagnet 8023, and the controller 15 has a built-in network control terminal for the user's mobile terminal to control;

[0031] The fixing mechanism 8 includes an installation cavity 801, in which an array of clamping mechanisms 802 are equidistantly arranged on the circumference of the central axis 4 in the installation cavity 801, and the clamping mechanism 802 includes a movable clamping block 8021, and a tooth groove 401 is provided on the circumference of the central axis 4 located at the installation cavity 801. One side of the clamping block 8021 is provided with a tooth 80211 that cooperates with and locks with the tooth groove 401, and one side of the clamping block 8021 is provided with a compression spring 8022 for making the tooth 80211 always mesh with the tooth groove 401, and one side of the clamping block 8021 is provided with a permanent magnet 80212, and a movable clamping block 8021 is provided at a position opposite to the inner wall of the installation cavity 801 and the permanent magnet 80212. There is a second electromagnet 8023; when working, when the staff needs to control the opening of the hemispherical valve to allow the fluid to pass, the staff can connect to the controller 15 through the mobile terminal and send a control command. The controller 15 receives the control command. First, the fixing mechanism 8 needs to be released from the fixing of the center axis 4. The controller 15 energizes the second electromagnet 8023. The magnetic poles of the second electromagnet 8023 are opposite to the magnetic poles of the permanent magnet 80212. Due to the principle that like repels like and opposites attract, the second electromagnet 8023 attracts the permanent magnet 80212 to approach, and the permanent magnet 80212 drives the clamping block 8021 to move, so that the tooth 80211 is no longer engaged with the tooth groove 401, and the compression spring 802 2 is compressed, thereby releasing the restriction of the middle axis 4, and the rear controller 15 controls the first electromagnet 7021 to be energized. When the first electromagnet 7021 array is energized, a strong magnetic field will be generated, and this magnetic field will act on the magnetic fluid in the magnetic fluid chamber 701, so that the magnetic particles in the magnetic fluid are rearranged and a magnetization effect is generated. Since the magnetic fluid has fluidity, when the magnetic field strength changes, the magnetic fluid will be moved by a force, and this force is the power source of the transmission mechanism 7. (The principle of the controller 15 controlling the first electromagnet 7021: determine the direction of the magnetic field after the first electromagnet 7021 is energized, and reasonably control the direction of the magnetic field of the first electromagnet 7021. The opening and closing sequence and the magnetic field strength can guide the flow of the magnetic fluid. First, a starting first electromagnet 7021 is selected, and the adjacent electromagnets are opened and closed in turn according to the rotation direction. The first electromagnets 7021 on the peripheral side are opened and closed repeatedly, so that the magnetic fluid will be guided to flow according to the cyclic opening and closing direction of the first electromagnet 7021. By controlling the magnetic field strength of the first electromagnet 7021, the magnetic field attracts the flow speed torque of the magnetic fluid. At that time, the magnetic fluid will rotate in the magnetic fluid chamber 701, and the controller 15 accurately controls the cycle on and off of the first electromagnets 7021, thereby ensuring the subsequent accurate control of the opening angle of the valve flap 5);When the magnetic fluid moves, it will apply thrust to the array of blades 7011 and drive the blades 7011 to rotate, so that the central axis 4 rotates, and the central axis 4 drives the valve flap 5 to rotate and open, so that the fluid flows from the inlet 2 to the outlet 3. While the central axis 4 rotates, it will drive the rotating shaft 901 on the rotary encoder 9 to rotate. The rotary encoder 9 transmits the rotation data to the controller 15, so that the controller 15 monitors the opening or closing angle of the control valve flap 5 in real time. When the valve flap 5 rotates to the set angle, the controller 15 disconnects the power supply of the second electromagnet 8023, and the permanent magnet 802 12 loses its attraction, and at the same time, the compression potential energy of the compression spring 8022 is released to push the clamping block 8021 to move toward the central axis 4, so that the teeth 80211 mesh with the tooth groove 401 again to fix the central axis 4, and the controller 15 can control the second electromagnet 8023 to be powered off according to the angular position of the central axis 4 detected by the rotary encoder 9, so that the teeth 80211 can always be correctly inserted into the gap in the tooth groove 401, thereby fixing the angle of the valve disc 5. If the staff needs to control the closing of the hemispherical valve, the working principle is consistent with the above and will not be repeated here. ;

[0032] Furthermore, a guide structure 803 for guiding the clamping block 8021 is provided in the installation cavity 801, and the guide structure 803 includes a guide groove 8031 ​​opened in the installation cavity 801, and also includes a guide rod 8032 fixedly set on the clamping block 8021, the guide rod 8032 extends into the guide groove 8031, and a roller 80321 is rotatably assembled on the matching surface of the guide rod 8032 and the guide groove 8031. During operation, in order to ensure the stability of the movement of the clamping block 8021, when the clamping block 8021 moves, it will drive the guide rod 8032 to move in the guide groove 8031, the guide rod 8032 and the guide groove 8031 ​​define the moving path of the clamping block 8021, and at the same time, the roller 80321 slides in the guide groove 8031 ​​to reduce the movement friction.

[0033] Furthermore, an annular shell 10 is fixedly provided at the outlet 3 in the valve body 1, a sealing ring 11 is movably provided in the annular shell 10, one end of the sealing ring 11 extends to the outside of the annular shell 10, and a piston ring 12 is fixedly provided at one end of the sealing ring 11 located inside the annular shell 10, and an air tank 13 is provided on the valve body 1, and the air tank 13 is connected with the inside of the annular shell 10 through an air pipe 14. When working, the valve flap 5 needs to ensure sealing when it is closed to prevent fluid leakage. In order to improve the sealing performance, first, when the valve flap 5 is rotated to close, the valve flap 5 applies pressure to the sealing ring 11, and the two fit tightly. At the same time, the sealing ring 11 pushes the piston ring 12 to move under the action of pressure. Since the annular housing 10 is filled with compressed gas, the piston ring 12 compresses the gas again, and provides an opposite force to the sealing ring 11 under the action of air pressure, so that the sealing ring 11 and the valve disc 5 fit more tightly and firmly. At the same time, when the sealing ring 11 is used for a long time and wears out, the sealing ring 11 can still rely on the air pressure to ensure the sealing performance. At the same time, the gas tank 13 can add gas to the annular housing 10 to ensure normal sealing.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A hemispherical valve, comprising a valve body (1), an inlet (2), and an outlet (3), wherein a valve flap (5) is eccentrically rotated by a central axis (4) in the valve body (1), characterized in that: The valve body (1) is fixedly mounted with a device box (6) by means of fixing bolts. A transmission mechanism (7) for driving the valve flap (5) to rotate and a fixing mechanism (8) for fixing the angular position of the valve flap (5) are respectively arranged in the device box (6) by means of a partition. The transmission mechanism (7) comprises a magnetic fluid chamber (701) filled with magnetic fluid, and an assembly cavity (702) located on the peripheral side of the magnetic fluid chamber (701). The top of the device box (6) is fixed by means of fixing bolts and is sealed with a top The top end of the central axis (4) extends to the top cover (601) and is rotatably connected to the top cover (601) via a rotating seat; the central axis (4) is provided with blades (7011) equidistantly arranged on the circumference of the magnetic fluid chamber (701); a plurality of first electromagnets (7021) for providing a magnetic field for the magnetic fluid are fixedly mounted in an annular array in the assembly cavity (702); and a controller (15) for controlling the opening and closing of the plurality of first electromagnets (7021) is fixedly mounted on the top cover (601).

2. A hemispherical valve according to claim 1, characterized in that: The fixing mechanism (8) comprises an installation cavity (801), wherein an array of clamping mechanisms (802) are arranged equidistantly on the peripheral side of the central axis (4) in the installation cavity (801), wherein the clamping mechanism (802) comprises a movable clamping block (8021), wherein a tooth groove (401) is provided on the peripheral side of the central axis (4) located in the installation cavity (801), wherein one side of the clamping block (8021) is provided with teeth (80211) which cooperate and lock with the tooth groove (401), wherein one side of the clamping block (8021) is provided with a compression spring (8022) for making the teeth (80211) always mesh with the tooth groove (401), wherein one side of the clamping block (8021) is provided with a permanent magnet (80212), and wherein a second electromagnet (8023) is provided at a position opposite to the inner wall of the installation cavity (801) and the permanent magnet (80212).

3. A hemispherical valve according to claim 2, characterized in that: A guide structure (803) for guiding the clamping block (8021) is arranged in the installation cavity (801), and the guide structure (803) includes a guide groove (8031) opened in the installation cavity (801), and also includes a guide rod (8032) fixedly arranged on the clamping block (8021), and the guide rod (8032) extends into the guide groove (8031).

4. A hemispherical valve according to claim 3, characterized in that: A roller (80321) is rotatably mounted on the matching surface of the guide rod (8032) with the guide groove (8031).

5. A hemispherical valve according to claim 1, characterized in that: The top cover (601) is equipped with a rotary encoder (9) for monitoring the rotation angle of the central axis (4); a slot (902) is provided on the rotating shaft (901) of the rotary encoder (9); a docking slot (402) for the rotating shaft (901) to be inserted into is provided on the central axis (4); a protrusion (4021) is provided in the docking slot (402) for being plugged into and out of the slot (902).

6. A hemispherical valve according to claim 1, characterized in that: An annular shell (10) is fixedly arranged at the outlet (3) in the valve body (1), a sealing ring (11) is movably arranged in the annular shell (10), one end of the sealing ring (11) extends to the outside of the annular shell (10), a piston ring (12) is fixedly arranged at one end of the sealing ring (11) located inside the annular shell (10), and an air tank (13) is arranged on the valve body (1), and the air tank (13) is connected to the inside of the annular shell (10) through an air pipe (14).

7. A hemispherical valve according to claim 1, characterized in that: The data receiving end of the controller (15) is data-connected to the rotary encoder (9) via a wire, and the control end of the controller (15) is electrically connected to the first electromagnet (7021) and the second electromagnet (8023) via a wire.

8. A hemispherical valve according to claim 7, characterized in that: The controller (15) has a built-in network control terminal for control by a user's mobile terminal.

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