A valve core for an electrically operated valve

Abstract

The utility model provides a valve core for electric valve belongs to valve technical field. It solved the existing electric valve's valve core easy to form the limescale and influences sensitivity etc. technical problem. The valve core of this electric valve, including valve shell, valve rod, dynamic valve piece, static valve piece, have water inlet hole one and plugging part one on dynamic valve piece, have water inlet hole two and plugging part two on static valve piece, and dynamic valve piece and static valve piece pass through plane and lean against and relatively rotate and realize water inlet hole one and water inlet hole two conduction or close, the lower end sealing of static valve piece fixed water inlet seat, the water inlet seat is formed with water inlet channel and water guide portion, the sealing fixed seat has in water inlet channel, the fixed seat middle is provided with water through -hole, and water through -hole and water inlet channel intercommunication, and be provided with one -way water through -hole between fixed seat and water guide portion, and one -way water through -hole pass through up and down movement to lean against or away from fixed seat and realize plugging or open water through -hole. The utility model guarantees the sensitive control performance of valve core.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and specifically refers to a valve core used in electric valves. Background Technology

[0002] An electric valve is controlled by an electric actuator, which controls the rotation angle of the valve stem in the valve core to control the flow rate of the medium in the pipeline. For example, the electric valve described in Chinese Patent Application No. 2020114108642 includes a transmission mechanism, a valve stem, and a connecting seat. The transmission mechanism includes a fixed gear ring and an output planetary carrier. The connecting seat has a receiving cavity and includes a first step. Part of the fixed gear ring is located in the receiving cavity and is fixedly connected to the connecting seat. The output planetary carrier is integrally formed with or assembled with the valve stem and is located in the receiving cavity. The output planetary carrier is positioned between the fixed gear ring and the first step, and is axially limited by the fixed gear ring and the first step. Thus, when fluid pressure acts on the valve stem, the pressure is transmitted to the fixed gear ring through the output planetary carrier. The fixed gear ring is fixedly positioned, allowing the fluid pressure to be offset by the fixed gear ring. This helps to avoid increased rotational friction in the transmission mechanism caused by fluid pressure, reducing frictional losses in the transmission mechanism and thus improving the service life of the electric valve.

[0003] However, the valve core is spherical, and the channel in the middle of the valve core will form a certain angle with the valve core seat during rotation. The medium flows into the valve body cavity and stagnates in the dead corner. Scale is easy to form on the inner wall of the valve body cavity. The scale adhesion increases the rotational resistance of the valve core, reduces the sensitivity of the valve core rotation, and affects the opening or closing of the valve core. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a valve core for electric valves. The technical problem this invention aims to solve is to improve the valve core structure, reduce scale formation, and thus ensure the sensitive and precise control performance of the valve core.

[0005] The objective of this utility model can be achieved through the following technical solution: A valve core for an electric valve includes a valve housing, wherein the valve housing includes, from top to bottom, a valve stem, a moving valve plate, and a stationary valve plate. The valve stem is fixedly connected to the moving valve plate. The moving valve plate has a water inlet hole one and a blocking part one. The stationary valve plate has a water inlet hole two and a blocking part two. The moving valve plate and the stationary valve plate achieve the opening or closing of the water inlet hole one and the water inlet hole two by abutting against each other on a plane and rotating relative to each other. A water inlet seat is sealed and fixed at the lower end of the stationary valve plate. A water inlet channel and a water guide part are formed in the water inlet seat. A fixed seat is sealed and fixed in the water inlet channel. A water passage hole is provided in the middle of the fixed seat. The water passage hole is connected to the water inlet channel. A one-way water passage component is provided between the fixed seat and the water guide part. The one-way water passage component moves up and down to abut against or move away from the fixed seat to block or open the water passage hole.

[0006] In this design, both the moving and stationary valve plates are made of ceramic. The stationary valve plate has two inlet holes and two sealing parts, while the moving valve plate also has one inlet hole and one sealing part. When the valve stem rotates, it drives the moving valve plate to rotate. The moving and stationary valve plates slide in close planar contact. The medium flows only through the one and two inlet holes on the moving and stationary valve plates. The inlet holes are open when aligned and closed when misaligned. To better buffer the water flow, reduce the impact of the water flow on the moving and stationary valve plates, and prevent backflow, a one-way water passage component is installed under the stationary valve plate. The flow channel formed between the one-way water passage component and the inlet seat is directly connected to the inlet hole, so that there is no angled stagnation area after the medium enters the valve core. The medium cannot stagnate and form scale, ensuring the sensitive and precise control performance of the valve core.

[0007] Furthermore, the water guide portion is located at the end of the water inlet seat, the water guide portion has at least two axially distributed water guide holes, the water guide portion has a guide hole, and the water guide hole surrounds the guide hole.

[0008] Furthermore, the unidirectional water-passing component includes an arc plate, a guide rod formed in the middle of the arc plate, and an arc-shaped claw formed on the upper end of the arc plate and protruding outward. There are at least two arc-shaped claws and they are evenly distributed circumferentially. The water-passing guide part has a guide hole in the middle. The guide rod passes through the guide hole. A return spring is sleeved on the outer periphery of the guide rod. The two ends of the return spring abut against the arc plate and the water-passing guide part, respectively.

[0009] Furthermore, the inner peripheral wall of the water inlet seat is provided with an arc-shaped groove that gradually expands towards the water guide part, and the upper end of the arc-shaped claw abuts against the side wall of the arc-shaped groove.

[0010] Furthermore, a sealing element is embedded in the outer periphery of the water inlet seat, the outer periphery of the sealing element abuts against the valve body, and the upper end of the sealing element abuts against the fixed plate.

[0011] Furthermore, the upper end of the seal has at least two rings of sealing protrusions protruding upwards, and the lower end of the seal has at least two rings of sealing protrusions protruding downwards.

[0012] Furthermore, the upper end of the valve body is provided with a mounting hole, the end of the valve stem away from the moving valve plate extends out of the mounting hole, and a sealing ring is provided between the valve stem and the wall of the mounting hole.

[0013] Furthermore, a water outlet is provided on the side wall of the valve housing.

[0014] Compared with existing technologies, the technical advantages of this utility model are as follows: 1. Water flows evenly through the guide hole to push the arc plate, avoiding direct impact on the stationary and moving valve plates, reducing vibration. The flow channel formed between the unidirectional water passage and the inlet seat is directly connected to the inlet hole, ensuring that there is no angled stagnation area after the medium enters the valve core. This prevents the medium from stagnating and forming scale, thus ensuring the sensitive and precise control performance of the valve core. 2. When the valve core is closed, the return spring forcibly closes the water passage, preventing the medium from flowing back, stagnating, and forming scale. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the present invention.

[0016] Figure 2 This is a perspective view of the utility model.

[0017] Figure 3 This is a perspective view of the present invention after the valve body has been removed.

[0018] Figure 4 This is a perspective view of the unidirectional water passage component and the fixing base of this utility model.

[0019] Figure 5 This is a cross-sectional view of the water inlet seat, one-way water passage component, and fixing seat of this utility model.

[0020] Figure 6 This is a schematic diagram of the valve body of this utility model.

[0021] Drawing number markings: 1. Valve body; 101. Mounting hole; 102. Outlet; 2. Valve stem; 3. Moving valve plate; 301. Inlet hole one; 302. Sealing part one; 4. Stationary valve plate; 401. Inlet hole two; 402. Sealing part two; 5. Inlet seat; 501. Inlet channel; 502. Water guide part; 503. Water guide hole; 504. Guide hole; 505. Arc groove; 6. Fixed seat; 601. Water through hole; 7. One-way water passage component; 701. Arc plate; 702. Guide rod; 703. Arc claw; 8. Return spring; 9. Sealing component; 901. Protrusion one; 902. Protrusion two; 10. Sealing ring; 11. Valve body; 1101. Inlet chamber; 1102. Outlet chamber. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] It should be noted that the descriptions of "up", "down", "left", "right", "top", "bottom", etc. in this utility model are defined based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] according to Figures 1 to 6 As shown, a valve core for an electric valve is disclosed. The electric valve includes an electric assembly and a valve body 11. The valve body 11 includes an inlet chamber 1101 and an outlet chamber 1102, which are separated into relatively independent spaces by a partition. A connecting hole is provided on the partition, which connects the inlet chamber 1101 and the outlet chamber 1102 and is used to install and fix the valve housing 1. The valve core includes the valve housing 1, which includes, from top to bottom, a valve stem 2, a moving valve plate 3, and a stationary valve plate 4. The valve stem 2 is fixedly connected to the moving valve plate 3. The moving valve plate 3 has a first inlet hole 301 and a first sealing part 302, and the stationary valve plate 4 has a second inlet hole 401 and a second sealing part 402. The moving valve plate 3 and the stationary valve plate 4 achieve the opening or closing of the first inlet hole 301 and the second inlet hole 401 by abutting against each other on a plane and rotating relative to each other. The lower end of the stationary valve plate 4 is sealed and fixed. The system includes a water inlet seat 5, within which a water inlet channel 501 and a water guide portion 502 are formed. A fixing seat 6 is sealed and fixed within the water inlet channel 501. A water passage hole 601 is provided in the middle of the fixing seat 6, communicating with the water inlet channel 501. A one-way water passage component 7 is provided between the fixing seat 6 and the water guide portion 502. The one-way water passage component 7 moves up and down to abut against or move away from the fixing seat 6 to block or open the water passage hole 601. The water guide portion 502 is located at the end of the water inlet seat 5 and has at least two axially distributed water guide holes 503. The water guide portion 502 also has a guide hole 504, with the water guide holes 503 surrounding the guide hole 504. The one-way water passage component 7 includes an arc plate 701, a guide rod 702 formed in the middle of the arc plate 701, and an arc-shaped claw 703 formed on the upper end of the arc plate 701 and protruding outward. There are at least two arc-shaped claws 703 and they are evenly distributed circumferentially. The water passage guide part 502 has a guide hole 504 in the middle. The guide rod 702 passes through the guide hole 504. A return spring 8 is sleeved on the outer periphery of the guide rod 702. The two ends of the return spring 8 abut against the arc plate 701 and the water passage guide part 502 respectively.

[0025] The inner circumferential wall of the water inlet seat 5 is provided with an arc-shaped groove 505 that gradually expands towards the water guide part 502, and the upper end of the arc-shaped claw 703 abuts against the side wall of the arc-shaped groove 505. A sealing element 9 is embedded in the outer circumference of the water inlet seat 5, and the outer circumference of the sealing element 9 abuts against the valve body 1, and the upper end of the sealing element 9 abuts against the fixed plate. The upper end face of the sealing element 9 has at least two sealing protrusions 901 protruding upward, and the lower end face of the sealing element 9 has at least two sealing protrusions 902 protruding downward.

[0026] The valve body 1 has a mounting hole 101 at its upper end. The end of the valve stem 2 away from the moving valve plate 3 extends out of the mounting hole 101. A sealing ring 10 is provided between the valve stem 2 and the wall of the mounting hole 101. A water outlet 102 is provided on the side wall of the valve body 1.

[0027] The moving valve plate 3 and the stationary valve plate 4 are made of ceramic material. The stationary valve plate 4 is provided with a second water inlet hole 401 and a second sealing part 402. The moving valve plate 3 is also provided with a first water inlet hole 301 and a first sealing part 302. When the valve stem 2 rotates, it drives the moving valve plate 3 to rotate. The moving and stationary valve plates 4 slide in close planar contact. The medium flows only through the first water inlet hole 301 and the second water inlet hole 401 on the moving and stationary valve plates 4. The first water inlet hole 301 and the second water inlet hole 401 are connected when aligned and closed when misaligned. In order to better buffer the water flow, reduce the impact of the water flow on the moving valve plate 3 and the stationary valve plate 4, and prevent backflow, a one-way water passage component 7 is installed under the stationary valve plate 4. The flow passage formed between the one-way water passage component 7 and the water inlet seat 5 is directly connected to the water inlet hole, so that there is no angled stagnation area after the medium enters the valve core. The medium cannot stagnate and form scale, ensuring the sensitive and precise control performance of the valve core.

[0028] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A valve core for an electric valve, comprising a valve housing (1), wherein the valve housing (1) comprises, from top to bottom, a valve stem (2), a moving valve plate (3), and a stationary valve plate (4), wherein the valve stem (2) is fixedly connected to the moving valve plate (3), the moving valve plate (3) has a first water inlet hole (301) and a first sealing part (302), and the stationary valve plate (4) has a second water inlet hole (401) and a second sealing part (402), wherein the moving valve plate (3) and the stationary valve plate (4) achieve the opening or closing of the first water inlet hole (301) and the second water inlet hole (401) by abutting against each other on a plane and rotating relative to each other, characterized in that: The lower end of the static valve plate (4) is sealed and fixed with a water inlet seat (5). The water inlet seat (5) is formed with a water inlet channel (501) and a water guide part (502). The water inlet channel (501) is sealed and fixed with a fixed seat (6). The fixed seat (6) is provided with a water passage hole (601) in the middle. The water passage hole (601) is connected to the water inlet channel (501). A one-way water passage component (7) is provided between the fixed seat (6) and the water guide part (502). The one-way water passage component (7) moves up and down to abut against or move away from the fixed seat (6) to block or open the water passage hole (601).

2. The valve core for an electric valve according to claim 1, characterized in that: The water guide portion (502) is located at the end of the water inlet seat (5). The water guide portion (502) has at least two axially distributed water guide holes (503). The water guide portion (502) has a guide hole (504). The water guide hole (503) surrounds the guide hole (504).

3. A valve core for an electric valve according to claim 2, characterized in that: The one-way water passage component (7) includes an arc plate (701), a guide rod (702) formed in the middle of the arc plate (701), and an arc-shaped claw (703) formed on the upper end of the arc plate (701) and protruding outward. There are at least two arc-shaped claws (703) and they are evenly distributed circumferentially. The guide rod (702) passes through the guide hole (504). A return spring (8) is sleeved on the outer periphery of the guide rod (702). The two ends of the return spring (8) abut against the arc plate (701) and the water passage guide part (502) respectively.

4. A valve core for an electric valve according to claim 3, characterized in that: The inner peripheral wall of the water inlet seat (5) is provided with an arc-shaped groove (505) that gradually expands toward the water guide part (502), and the upper end of the arc-shaped claw (703) abuts against the side wall of the arc-shaped groove (505).

5. A valve core for an electric valve according to any one of claims 1 to 4, characterized in that: The water inlet seat (5) is fitted with a sealing element (9) on its outer periphery. The outer periphery of the sealing element (9) is sealed against the valve body (1), and the upper end of the sealing element (9) is sealed against the fixed plate.

6. A valve core for an electric valve according to claim 5, characterized in that: The upper end of the seal (9) has at least two rings of sealing protrusions (901) protruding upwards, and the lower end of the seal (9) has at least two rings of sealing protrusions (902) protruding downwards.

7. A valve core for an electric valve according to claim 1, characterized in that: The valve body (1) is provided with a mounting hole (101) at its upper end. The valve stem (2) extends out of the mounting hole (101) at the end away from the moving valve plate (3). A sealing ring (10) is provided between the valve stem (2) and the hole wall of the mounting hole (101).

8. A valve core for an electric valve according to claim 1, characterized in that: The valve housing (1) is provided with a water outlet (102) on its side wall.

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