An electrically operated valve

Abstract

The application provides an electric valve, which can increase the threaded fitting length of a valve core assembly and a driving assembly, and improve reliability. The electric valve provided by the application comprises: a valve core assembly, which is provided with external threads; a valve body, which is connected with the valve core assembly in the circumferential direction of the electric valve; a driving assembly, which comprises a rotor and a driving rod, the driving rod comprises an internal threaded section, the internal threaded section is provided with internal threads, and the external threads of the valve core assembly and the internal threads of the driving assembly are matched; the rotor drives the driving rod to rotate to drive the valve core assembly to move relative to the valve body in the axial direction; and a bearing, at least part of the bearing is located between the internal threaded section and the valve body in the radial direction of the electric valve.

Claims

1. An electrically operated valve characterised in that, include: Valve core assembly (50), the valve core assembly (50) including external thread (5011); The valve body (40), the valve core assembly (50) and the valve body (40) are connected in the circumferential upper limit of the electric valve (100); A drive assembly (20) includes a rotor (201) and a drive rod (202). The drive rod (202) includes an internal thread section (2021) with a threaded hole (2021b). The hole wall forming the threaded hole (2021b) includes an internal thread (2021a). The external thread (5011) of the valve core assembly (50) and the internal thread (2021a) of the drive assembly (20) are engaged. The rotor (201) drives the drive rod (202) to rotate, thereby driving the valve core assembly (50) to move relative to the valve body (40) along the axial direction of the electric valve (100). The bearing (30) has at least a portion located radially between the internal thread section (2021) and the valve body (40) of the electric valve (100).

2. The motorized valve of claim 1, wherein, Along the radial projection of the electric valve, at least a portion of the projection of the internal thread segment (2021) coincides with the projection of the rotor (201).

3. Motorized valve according to claim 1 or 2, characterized in that The valve body (40) includes a cylindrical support section (4031), and at least a portion of the bearing (30) is located radially between the internal thread section (2021) and the support section (4031) of the electric valve (100).

4. The motorized valve of claim 3, wherein, The internal thread section (2021) includes a large diameter section (20212) and a small diameter section (20211). Along the axial direction of the electric valve, the large diameter section (20212) is away from the rotor (201) relative to the small diameter section (20211). A first step portion (2021c) is formed between the large diameter section (20212) and the small diameter section (20211). A portion of the bearing (30) abuts against the first step portion (2021c) axially. The bearing (30) is located radially between the small diameter section (20211) and the support section (4031).

5. The motorized valve of claim 1, wherein, The drive rod (202) is made of metal, and the drive rod (202) and the rotor (201) are fixedly connected or limitedly connected.

6. The motorized valve according to any of claims 1-2, 4 or 5, characterized in that, The valve core assembly (50) includes a transmission rod (501) and a valve core portion. The transmission rod (501) and the valve core portion are fixedly connected, limited connected, or integrally formed. The transmission rod (501) is provided with the external thread (5011). The valve body (40) has a valve port portion. The valve core portion can abut against the valve port portion.

7. The motorized valve of claim 6, wherein, The valve core assembly (50) includes a first end (505) remote from the drive assembly (20), the first end (505) and the valve body (40) being connected in the circumferential direction, and the valve port being located axially between the drive rod (501) and the first end (505).

8. The motorized valve of claim 7, wherein, The valve body (40) has a limiting hole (401d), and the first end (505) is inserted into the limiting hole (401d) and connected to the hole wall forming the limiting hole (401d) in the circumferential direction; the valve body (40) has a plurality of connecting holes (401e), and the plurality of connecting holes (401e) are arranged at intervals around the limiting hole (401d).

9. The motorized valve of claim 8, wherein, The valve body (40) also includes a bottom wall portion located at one end of the axial direction, the bottom wall portion being provided with a bottom channel (401b), and the valve port portion including a first valve port portion (401c). The valve body (40) includes a limiting plug (4011) that is either separately connected or integrally formed, and a main body (4012). The main body (4012) is provided with the first valve port (401c). The limiting plug (4011) is located inside the main body (4012) and between the bottom channel (401b) and the first valve port (401c). The limiting hole (401d) and the connecting hole (401e) are provided on the limiting plug (4011) and pass through the limiting plug (4011) axially.

10. The electric valve according to claim 9, characterized in that, The first end (505) of the valve core assembly (50) is a rod segment with a non-circular radial cross section, and the wall of the hole forming the limiting hole (401d) has a mating surface that cooperates with and limits the first end (505).

11. The electric valve according to claim 7, characterized in that, The valve body (40) also includes a bottom wall portion located at one axial end and a side wall portion extending axially from the bottom wall portion. The side wall portion is provided with a first side channel (401a), and the bottom wall portion is provided with a bottom channel (401b). The valve core assembly (50) is axially movable and cooperates with the valve port portion of the valve body (40) to control the opening and closing of the first side channel (401a) and the bottom channel (401b). The first side channel (401a) is an inlet channel.

12. The motorized valve of claim 11, wherein, The side wall portion is also provided with a second side channel (402a), and the second side channel (402a), the first side channel (401a), and the bottom channel (401b) are distributed sequentially along the axial direction of the electric valve; The valve port includes a first valve port (401c) and a second valve port (402b), and the valve core assembly (50) has a first sealing portion (5041) and a second sealing portion (5042). When the valve core assembly (50) is in the first position, the first sealing part (5041) blocks the second valve port (402b), the first valve port (401c) is open, and the first side channel (401a) and the bottom channel (401b) are connected; when the valve core assembly (50) is in the second position, the second sealing part (5042) blocks the first valve port (401c), the second valve port (402b) is open, and the first side channel (401a) and the second side channel (402a) are connected; when the valve core assembly (50) is between the first position and the second position, the first side channel (401a) and the second side channel (402a) are connected, and the first side channel (401a) and the bottom channel (401b) are connected.

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