Electric valve with valve needle guiding function

Abstract

The utility model provides a kind of electric valve with valve needle guiding function, the electric valve with valve needle guiding function includes valve seat, the valve needle being arranged in the valve seat, the valve sleeve being arranged in one end of the valve seat, and guiding ring, the valve seat is hollowly arranged, one end of the valve needle has piston part, first ring groove is formed on the piston part along radial inner recess, the guiding ring is arranged in the first ring groove and is resisted with the valve seat along radial direction, the guiding ring is made of high polymer polymer material.The electric valve with valve needle guiding function of the utility model, by setting guiding ring, when the valve needle moves along axial direction, the guiding ring is in contact with valve seat, the guiding effect of the guiding ring is mentioned to the valve needle, so that the valve needle can be reduced and deviated and stuck.

Description

Technical Field

[0001] This utility model relates to the field of electric valve technology, specifically to an electric valve with a valve needle guiding function. Background Technology

[0002] Electric valve devices are electromagnetically controlled industrial equipment, serving as fundamental automated components for fluid control, and belong to the category of actuators.

[0003] Existing electric valves are prone to low-temperature durability jamming during use. After a series of tests, it is inferred that the valve needle may wobble due to structural reasons during operation, which may cause it to jam against the side wall.

[0004] In view of this, it is necessary to improve the existing electric valves to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an electric valve with a valve needle guiding function to solve the problem of jamming that easily occurs in existing electric valves.

[0006] To achieve the above objectives, this utility model provides an electric valve with a valve needle guiding function. The electric valve with a valve needle guiding function includes a valve seat, a valve needle disposed in the valve seat, a valve sleeve disposed at one end of the valve seat, and a guide ring. The valve seat is hollow, and one end of the valve needle has a piston portion. A first annular groove is formed radially inward on the piston portion. The guide ring is disposed in the first annular groove and abuts against the valve seat radially. The guide ring is made of PTFE material.

[0007] As a further improvement of this utility model, the electric valve with valve needle guiding function also includes a sealing ring. A second annular groove is formed radially recessed on the piston portion. The first annular groove and the second annular groove are spaced apart axially. The sealing ring is disposed in the second annular groove and abuts against the valve seat radially.

[0008] As a further improvement of this utility model, there are two first annular grooves and two guide rings, and the second annular groove is located axially between the two first annular grooves.

[0009] As a further improvement of this utility model, the number of the first annular groove and the guide ring is one, the valve seat is provided with a first flow channel opening radially at the end away from the valve sleeve, the second annular groove is disposed closer to the valve sleeve relative to the first annular groove, and the first annular groove is disposed closer to the first flow channel opening relative to the second annular groove.

[0010] As a further improvement of this utility model, the guide ring is broken along the axial direction to form a notch.

[0011] As a further improvement of this utility model, the height of the guide ring along the axial direction is less than the height of the first ring groove along the axial direction.

[0012] As a further improvement of this utility model, the valve needle and the valve seat are made of metal materials.

[0013] As a further improvement of this utility model, a second flow channel is provided axially at the end of the valve seat away from the valve body.

[0014] As a further improvement of this utility model, the guide ring is made of PTFE material.

[0015] The beneficial effects of this invention are as follows: The electric valve with valve needle guiding function of this invention, by setting a guide ring, allows the guide ring to abut against the valve seat when the valve needle moves axially. The guide ring improves the guiding effect of the valve needle, thereby reducing valve needle wobble and jamming. Furthermore, the guide ring is made of PTFE material, whose coefficient of friction with the valve seat is lower than that between the valve needle and the valve seat, further enhancing the guiding effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the electric valve with valve needle guiding function according to this utility model; Figure 2 yes Figure 1 A magnified structural diagram of region A in the middle. Detailed Implementation

[0017] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] like Figure 1 and Figure 2 As shown, the electric valve 100 with valve needle guiding function of this utility model includes a valve seat 1, a valve needle 2 disposed in the valve seat 1, a valve sleeve 3 disposed at one end of the valve seat 1, a guide ring 4, a valve stem 5, an iron core 6, and a coil 7.

[0021] The valve seat 1 is hollow, and the valve needle 2 has a main body 21 arranged axially and a piston part 22 extending radially outward from the main body 21, i.e., the piston part 22 is located at one end of the valve needle 2. A first annular groove 221 is formed radially inward on the piston part 22. The guide ring 4 is disposed in the first annular groove 221 and abuts against the valve seat 1 radially. The guide ring 4 is made of a polymer material, and in this preferred embodiment, the guide ring 4 is made of PTFE (polytetrafluoroethylene). The polymer material has a low coefficient of friction and can play a certain guiding role.

[0022] In this embodiment, by providing a guide ring 4, the guide ring 4 abuts against the valve seat 1 when the valve needle 2 moves axially. The guide ring 4 improves the guiding effect of the valve needle 2, thereby reducing the deflection and jamming of the valve needle 2. Furthermore, the guide ring 4 is made of PTFE material, and its coefficient of friction with the valve seat 1 is less than that between the valve needle 2 and the valve seat 1, further enhancing the guiding effect.

[0023] Because of the guide ring 4, the gap between the piston part 22 and the valve seat 1 can be appropriately increased, making installation simple and ensuring the perpendicularity of the valve needle 2 over a wide temperature range.

[0024] The valve needle 2 has a valve needle guiding function. The operating temperature range of the electric valve 100 is -40℃ to 150℃.

[0025] To achieve a sealing effect, in this embodiment, the electric valve 100 with valve needle guiding function, including valve needle 2, further includes a sealing ring 8. A second annular groove 222 is formed radially recessed on the piston portion 22. The first annular groove 221 and the second annular groove 222 are spaced apart axially. The sealing ring 8 is disposed within the second annular groove 222 and abuts against the valve seat 1 radially. The material of the sealing ring 8 can be HNBR (hydrogenated nitrile butadiene rubber).

[0026] To further improve the guiding effect, there are two first annular grooves 221 and two guide rings 4, with the second annular groove 222 located axially between the two first annular grooves 221. The two guide rings 4 are spaced apart axially, which can more effectively guide the valve needle 2 and prevent the valve needle 2 from rubbing against the valve seat 1 due to tilting.

[0027] In this embodiment, there is one first annular groove 221 and one guide ring 4. The valve seat 1 has a first flow channel 11 radially formed at the end away from the valve sleeve 3. The second annular groove 222 is disposed near the valve sleeve 3 relative to the first annular groove 221, and the first annular groove 221 is disposed near the first flow channel 11 relative to the second annular groove 222. The guide ring 4 can also play a certain sealing role.

[0028] The guide ring 4 is broken along the axial direction to form a notch. The notch gives the guide ring 4 a certain degree of elasticity in the circumferential direction, which will not affect the axial movement of the valve needle 2, and at the same time facilitates the installation of the guide ring 4. That is, in this embodiment, the guide ring 4 is not a complete ring, but a ring cut off at the notch.

[0029] In this embodiment, the height of the guide ring 4 along the axial direction is less than the height of the first annular groove 221 along the axial direction.

[0030] The valve needle 2 and the valve seat 1 are made of metal materials, such as 303 stainless steel or copper. The coefficient of friction between the valve needle 2 and the valve seat 1 is about 0.1, while the coefficient of friction between the guide ring 4 and the valve seat 1 is about 0.05.

[0031] The valve seat 1 has a second flow channel 12 axially formed at the end away from the valve sleeve 3. The valve needle 2 controls the connection or disconnection of the first flow channel 11 and the second flow channel 12 by moving axially.

[0032] Apart from the guide ring 4, the rest of the structure of the electric valve 100 with valve needle guiding function is similar to that of existing electric valves, and will not be described in detail here.

[0033] The electric valve 100 of this invention, which has a valve needle guiding function, incorporates a guide ring 4. When the valve needle 2 moves axially, the guide ring 4 abuts against the valve seat 1, enhancing the guiding effect of the valve needle 2 and reducing its tendency to wobble or jam. Furthermore, the guide ring 4 is made of PTFE material, whose coefficient of friction with the valve seat 1 is lower than that between the valve needle 2 and the valve seat 1, further improving the guiding effect.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An electric valve with a valve needle guiding function, characterized in that: The electric valve (100) with valve needle guiding function includes a valve seat (1), a valve needle (2) disposed in the valve seat (1), a valve sleeve (3) disposed at one end of the valve seat (1), and a guide ring (4). The valve seat (1) is hollow. One end of the valve needle (2) has a piston part (22). A first annular groove (221) is formed radially inward on the piston part (22). The guide ring (4) is disposed in the first annular groove (221) and abuts against the valve seat (1) radially. The guide ring (4) is made of a high molecular polymer material.

2. The electric valve with valve needle guiding function according to claim 1, characterized in that: The electric valve (100) with valve needle guiding function also includes a sealing ring (8). A second annular groove (222) is formed radially recessed on the piston part (22). The first annular groove (221) and the second annular groove (222) are spaced apart axially. The sealing ring (8) is disposed in the second annular groove (222) and abuts against the valve seat (1) radially.

3. The electric valve with valve needle guiding function according to claim 2, characterized in that: The number of the first annular groove (221) and the guide ring (4) is two, and the second annular groove (222) is located axially between the two first annular grooves (221).

4. The electric valve with valve needle guiding function according to claim 2, characterized in that: The number of the first annular groove (221) and the guide ring (4) is one. The valve seat (1) is radially provided with a first flow channel opening (11) at one end away from the valve sleeve (3). The second annular groove (222) is disposed close to the valve sleeve (3) relative to the first annular groove (221). The first annular groove (221) is disposed close to the first flow channel opening (11) relative to the second annular groove (222).

5. The electric valve with valve needle guiding function according to claim 1, characterized in that: The guide ring (4) is broken along the axial direction to form a notch.

6. The electric valve with valve needle guiding function according to claim 1, characterized in that: The height of the guide ring (4) along the axial direction is less than the height of the first annular groove (221) along the axial direction.

7. The electric valve with valve needle guiding function according to claim 1, characterized in that: The valve needle (2) and the valve seat (1) are made of metal.

8. The electric valve with valve needle guiding function according to claim 1, characterized in that: The valve seat (1) has a second flow channel (12) axially opened at the end away from the valve sleeve (3).

9. The electric valve with valve needle guiding function according to claim 1, characterized in that: The guide ring (4) is made of PTFE material.

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