High-reliability electric valve

Abstract

The high-reliability electric valve relates to the technical field of electric valves and comprises a coil assembly, a valve seat and a valve body, the coil assembly is provided with a cavity with a stator arranged in the circumferential direction, and after the valve body is in threaded connection with the valve seat, the tail of the valve seat is inserted into the corresponding cavity and is clamped and fixed, and a valve rod is installed in the valve seat in a sliding mode. The end, close to the valve body, of the valve rod is movably connected with a valve needle, and the valve rod slides to drive the valve needle to cut off a channel in the valve body. The valve needle is separated from the valve rod, the valve rod and the valve rod can be not coaxial, the precise sealing effect is achieved, the valve needle can have a moving space relative to the valve rod, sealing is conducted according to the adjusting position of a closure groove of the valve body, the precision between the valve rod and the valve body can be reduced, the design and production efficiency of the whole device is improved, and the cost is reduced. And the design cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric valves, and in particular to a high-reliability electric valve. Background Art

[0002] An electric valve is a valve body controlled by electromagnetics. The opening and closing of the entire valve body is realized by electromagnetically controlling the valve core inside the valve body. Since the opening and closing of the valve body is controlled by the valve core, the valve core needs to maintain a sealed state to block the valve body. When a columnar valve core is used, the longitudinal drive of the valve core is a linear drive, and the movement of the valve core can cut off the channel in the valve body. Normally, the valve core is a column, and the movement of the column needs to be coaxial with the cut-off hole reserved in the valve body. Therefore, the valve core and the cut-off hole need to maintain a high degree of precision, and the precision affects the entire electric valve production process and the cost of the electric valve. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a high-reliability electric valve to solve the problem that the valve core of the electric valve needs to maintain high precision.

[0004] Based on the technical problems existing in the background technology, the present invention proposes a high-reliability electric valve, including a coil assembly, a valve seat and a valve body, the coil assembly is provided with a cavity with a circumferentially arranged stator, and after the valve body and the valve seat are threadedly connected, the tail of the valve seat is inserted into and fixed to the corresponding cavity, and a valve stem is slidably installed in the valve seat, and a valve needle is movably connected to one end of the valve stem close to the valve body, and the sliding of the valve stem can drive the valve to cut off the channel in the valve body.

[0005] Preferably, the coil assembly is provided with triangular positioning columns on the inner wall of the cavity, and a plurality of triangular positioning columns are circumferentially distributed in the cavity. The coil assembly has a ring groove at one end facing the valve body, which is located at the opening of the cavity, and a rubber ring is installed in the ring groove.

[0006] Preferably, a connecting seat is arranged outside the valve seat, and the valve seat is covered with a ring body, which is located on the side of the connecting seat facing the coil assembly. The valve seat is inserted into the cavity and can be fixed by friction of the triangular positioning column. The ring body can squeeze the rubber ring with the ring groove and seal the cavity.

[0007] Preferably, a channel for liquid circulation is provided in the valve body, a cut-off groove is provided in the middle of the channel, and the valve needle can cut off the channel by inserting into the cut-off groove.

[0008] Preferably, a rotor is provided on the outer wall of the valve stem, the valve needle is provided with a cavity opening toward the coil assembly, an umbrella cap is provided at one end of the valve stem, and the umbrella cap is located in the cavity, the valve stem is sleeved with a ring body, the ring body is connected to the valve needle and limits the umbrella cap to move in the cavity.

[0009] Preferably, there is a distance between the umbrella cap and the inner wall of the cavity.

[0010] Preferably, an elastic member is further installed in the cavity, and two ends of the elastic member respectively abut against the umbrella cap and the valve needle.

[0011] Compared with the prior art, the high-reliability electric valve proposed by the present invention adopts the above technical solution to achieve the following technical effects:

[0012] The valve needle in the present invention is separated from the valve stem, which can achieve the non-coaxiality of the valve stem and achieve a precise sealing effect. The valve needle in the present application can have a moving space relative to the valve stem, and can adjust the position of the intercepting groove of the valve body to seal, which can reduce the precision between the valve stem and the valve body, improve the efficiency of the entire device design and production, and thus save design costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the overall installation structure diagram of the present invention;

[0014] Figure 2 This is a structural diagram of the valve seat of the present invention;

[0015] Figure 3 This is a structural diagram of the valve body of the present invention.

[0016] In the figure: 1, coil assembly; 2, valve seat; 3, valve body; 11, stator; 12, cavity; 41, valve stem; 42, valve needle; 31, channel; 13, triangular positioning column; 14, ring groove; 15, rubber ring; 16, ring body; 21, connecting seat; 22, ring body; 32, intercepting groove; 43, rotor; 421, cavity; 411, umbrella cap; 422, elastic part. DETAILED DESCRIPTION

[0017] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0019] Example

[0020] Please refer to Figure 1-Figure 3 The present invention proposes a high-reliability electric valve, including a coil assembly 1, a valve seat 2 and a valve body 3. The coil assembly 1 is provided with a cavity 12 in which a stator 11 is arranged circumferentially. After the valve body 3 is threadedly connected to the valve seat 2, the tail of the valve seat 2 is inserted into and fixed to the corresponding cavity 12. A valve stem 41 is slidably installed in the valve seat 2. A valve needle 42 is movably connected to one end of the valve stem 41 close to the valve body 3. The sliding of the valve stem 41 can drive the valve needle 42 to intercept the channel 31 in the valve body 3. When the valve stem 41 is not coaxial with the intercepting groove 32 that needs to be blocked in the valve body 3, the movement of the valve stem 41 toward the intercepting groove 32 can drive the valve needle 42 to move toward the intercepting groove 32. At this time, the valve needle 42 may be not coaxial with the intercepting groove 32. Then, the valve needle 42 can move relative to the valve stem 41, that is, it can be translated or tilted, so as to block the intercepting groove 32 and achieve the intercepting effect. The driving principle of the valve stem 41 of the electric valve in this scheme is the same as the valve core driving principle in the prior art.

[0021] In a specific embodiment, refer to Figure 1 , Figure 3 The coil assembly 1 is located on the inner wall of the cavity 12 and is provided with a triangular positioning column 13. The triangular positioning column 13 is a protruding object in the cavity 12, which can undergo a certain elastic deformation. Multiple triangular positioning columns 13 are distributed circumferentially in the cavity 12. The coil assembly 1 has a ring groove 14 at one end facing the valve body 3, which is located at the opening of the cavity 12, and a rubber ring 15 is installed in the ring groove 14.

[0022] In a specific embodiment, refer to Figure 1 , Figure 2 , Figure 3, a connecting seat 21 is arranged on the outside of the valve seat 2, and a ring body 22 is sleeved on the valve seat 2. The ring body 22 is located on the side of the connecting seat 21 facing the coil assembly 1. The valve seat 2 is inserted into the cavity 12 and can be fixed by friction of the triangular positioning column 13. The ring body 22 can squeeze the rubber ring 15 with the ring groove 14 and seal the cavity 12. In combination with the above scheme, the triangular positioning column 13 is used for the installation of the valve seat 2. After the valve seat 2 is inserted into the cavity 12, the edge of the valve seat 2 will be squeezed by the triangular positioning column 13, which can achieve the effect of fixing the valve seat 2. If the triangular positioning column 13 is not provided, 3. It may be difficult to insert the valve seat 2 into the cavity 12 during installation. Slight deformation of the triangular positioning column may cause the valve stem 41 in the valve seat 2 to become skewed. After the valve body 3 and the valve seat 2 are connected by threads, there is still a gap between the valve seat 2 and the cavity 12. Therefore, after the coil assembly 1 is installed, the valve seat 2 can squeeze the rubber ring 15 through the ring body 22, so that there is a sealing effect between the valve seat 2 and the coil assembly 1, avoiding the possibility of liquid entering the cavity 12. Furthermore, a rubber ring 15 is also provided between the valve seat 2 and the valve body 3 for sealing.

[0023] In a specific embodiment, refer to Figure 1 , Figure 2 A channel 31 for liquid circulation is provided in the valve body 3, and a cut-off groove 32 is provided in the middle of the channel 31. The valve needle 42 is inserted into the cut-off groove 32 to cut off the channel 31; the cut-off groove 32 in the present application is a necessary place for liquid to flow through the channel 31, so after the cut-off groove 32 is cut off, the channel 31 can be cut off, and the valve needle 42 can be inserted into the cut-off groove 32 to block the channel 31.

[0024] In a specific embodiment, refer to Figure 1 , Figure 2 The outer wall of the valve stem 41 is provided with a rotor 43, the valve needle 42 is provided with a cavity 421 with an opening toward the coil assembly 1, an umbrella cap 411 is provided at one end of the valve stem 41, and the umbrella cap 411 is located in the cavity 421, the valve stem 41 is sleeved with a ring body 16, the ring body 16 is connected to the valve needle 42 and limits the umbrella cap 411 to move in the cavity 421. In this solution, the ring body 16 limits the cavity 421, the valve stem 41 can slide relative to the ring body 16, and the hole of the ring body 16 is directly The diameter is larger than the cross-sectional diameter of the valve stem 41, so that the valve stem 41 can translate relative to the ring body 16; during installation, the umbrella cap 411 will be restricted by the ring body 16 to move in the cavity 421, and there is a certain distance between the umbrella cap 411 and the inner wall of the cavity 421, so the umbrella cap 411 can also translate in the cavity 421. In this scenario, the valve stem 41 squeezes the valve needle 42, and the valve needle 42 can translate, rotate or deflect slightly relative to the valve stem 41, thereby adapting to the position of the intercepting groove 32.

[0025] In a specific embodiment, refer to Figure 2An elastic member 422 is also installed in the cavity 421 , and two ends of the elastic member 422 respectively abut against the umbrella cap 411 and the valve needle 42 . In the present application, the thrust is transmitted between the valve stem 41 and the valve needle 42 through the elastic member 422 .

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high reliability electric valve, characterized in that: The invention comprises a coil assembly (1), a valve seat (2) and a valve body (3), wherein the coil assembly (1) is provided with a cavity (12) in which a stator (11) is arranged circumferentially, and after the valve body (3) is threadedly connected to the valve seat (2), the tail of the valve seat (2) is inserted into and fixed to the corresponding cavity (12), and a valve stem (41) is slidably installed in the valve seat (2), and a valve needle (42) is movably connected to one end of the valve stem (41) close to the valve body (3), and the sliding of the valve stem (41) can drive the valve needle (42) to cut off the channel (31) in the valve body (3).

2. The high reliability electric valve according to claim 1, characterized in that: The coil assembly (1) is located on the inner wall of the cavity (12) and is provided with a triangular positioning column (13), and a plurality of triangular positioning columns (13) are circumferentially distributed in the cavity (12). The end of the coil assembly (1) facing the valve body (3) has a ring groove (14), which is located at the opening of the cavity (12), and a rubber ring (15) is installed in the ring groove (14).

3. The high reliability electric valve according to claim 2, characterized in that: A connecting seat (21) is arranged outside the valve seat (2), and a ring body (22) is sleeved on the valve seat (2). The ring body (22) is located on the side of the connecting seat (21) facing the coil assembly (1). The valve seat (2) is inserted into the cavity (12) and can be fixed by friction with the triangular positioning column (13). The ring body (22) can squeeze the rubber ring (15) with the ring groove (14) and seal the cavity (12).

4. The high reliability electric valve according to claim 1, characterized in that: The valve body (3) is provided with a channel (31) for liquid circulation, a cut-off groove (32) is provided in the middle of the channel (31), and the valve needle (42) is inserted into the cut-off groove (32) to cut off the flow of the channel (31).

5. The high reliability electric valve according to claim 1, characterized in that: The outer wall of the valve stem (41) is provided with a rotor (43); the valve needle (42) is provided with a cavity (421) opening toward the coil assembly (1); an umbrella cap (411) is provided at one end of the valve stem (41), and the umbrella cap (411) is located in the cavity (421); the valve stem (41) is sleeved with a ring body (16), and the ring body (16) is connected to the valve needle (42) and restricts the umbrella cap (411) from moving in the cavity (421).

6. The high reliability electric valve according to claim 5, characterized in that: There is a distance between the umbrella cap (411) and the inner wall of the cavity (421).

7. The high reliability electric valve according to claim 6, characterized in that: An elastic member (422) is also installed in the cavity (421), and two ends of the elastic member (422) respectively abut against the umbrella cap (411) and the valve needle (42).

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