Integrated electrically operated valve

Abstract

The utility model provides an integrated electric valve, including valve seat, valve stem, sealing component, valve body, sleeve, rotor shaft, rotor, strip permanent magnet, stator and junction box, the lower part of rotor shaft is equipped with rotor shaft center hole, rotor shaft center hole diameter is slightly larger than valve stem diameter, the hole depth is slightly larger than valve stem linear stroke, and the valve stem can enter rotor shaft center hole to reduce the overall height of integrated electric valve when valve opening operation, the upper part of valve stem is the matched screw structure with sleeve, can rotate motion of sleeve is changed into valve stem linear motion, the lower end of valve stem is connected sealing component, and the taper portion of sealing component and valve seat sealing surface are matched, and sealing component can block medium flow when valve closing, can realize that valve stem and outside have no intercommunication channel, need not packing and other dynamic seal, avoid medium leakage, cancel the speed reducer, simplify electric valve overall structure, reduce operating noise, prolong the life.

Description

Technical Field

[0001] This utility model belongs to the field of electric valve technology, and in particular to an integrated electric valve. Background Technology

[0002] Currently, most electric valves have a separate structure: the valve is located at the bottom, and the valve actuator is at the top. The valve and actuator are separate units. The valve stem extends out of the valve seat and connects to the shaft of the valve actuator. To prevent leakage of the medium to the outside at the valve stem extension point, a packing seal is used at the extension edge. The packing seal is neatly and tightly coiled around the valve stem and installed in the packing seat hole of the valve seat. The packing also makes tight contact with the outer circumference of the valve stem and the inner circle of the valve seat. When the valve is running, the valve actuator drives the valve stem to rotate, which in turn drives the valve plate or other sealing components to open or close the valve. Valve actuators often use worm gear reducers, but other gear reducer structures are also possible.

[0003] The packing seal in electric valves is a dynamic seal. During valve operation, the valve stem and packing rub against each other. The packing seal requires advanced winding technology; improper installation or prolonged use can lead to significant wear and leakage at the seal. Furthermore, the reducer in the electric valve drive unit is noisy during operation, and the worm gear or gears are prone to wear, resulting in a short service life, and the structure is complex. Utility Model Content

[0004] In view of the above problems, the purpose of this application is to provide an integrated electric valve that enables the valve stem to have no connection channel with the outside world, eliminates the need for dynamic seals such as packing, and avoids media leakage; eliminates the reducer, simplifies the overall structure of the electric valve, reduces operating noise, and extends service life.

[0005] To achieve some or all of the above objectives or other objectives, this application provides the following technical solution: an integrated electric valve, comprising a valve seat, valve stem, sealing component, valve body, sleeve, rotor shaft, rotor, strip-shaped permanent magnet, stator, and junction box; the valve seat has vertically intersecting vertical and horizontal channels, and the lower part of the valve stem moves freely within the vertical channel; the lower end of the valve stem is fixedly connected to the sealing component, which moves freely within the vertical channel and can block the flow of medium in the horizontal channel; the upper end of the valve seat is fixedly connected to the lower end of the valve body, and the valve body has a valve body center hole inside; the valve stem... The valve stem moves freely within the central hole of the valve body; an internal connecting sleeve is provided inside the valve body, the upper end of which is fixedly connected to the lower end of the rotor shaft, the lower part of the rotor shaft has a central hole that communicates with the inside of the sleeve, the valve stem passes through the sleeve and is threadedly connected to the outside of the sleeve, the upper part of the valve stem moves freely in a straight line within the central hole of the rotor shaft, the diameter of the central hole of the rotor shaft is larger than the diameter of the valve stem, and the depth of the central hole of the rotor shaft is greater than the linear stroke of the valve stem; the upper part of the rotor shaft passes through the rotor, a strip-shaped permanent magnet is fitted over the rotor, a stator is fitted over the strip-shaped permanent magnet, and the stator is connected to a junction box.

[0006] Furthermore, it also includes a base; the stator is disposed inside the base, and the junction box is disposed outside the base; the base is fixedly connected to the valve body.

[0007] Furthermore, it also includes a stator shielding sleeve, a bearing housing, a first bearing, and a second bearing; the lower inner circumferential surface of the machine base is connected to the lower outer circumferential surface of the stator shielding sleeve, the lower inner circumferential surface of the stator shielding sleeve is fixedly connected to the bearing housing, and the bearing housing is connected to the rotor shaft via the second bearing; the middle part of the stator shielding sleeve is disposed between the strip-shaped permanent magnet and the stator; the upper inner circumferential surface of the stator shielding sleeve is connected to the rotor via the first bearing; the lower end face of the stator shielding sleeve is sealed to the upper end face of the valve body.

[0008] Furthermore, it also includes a pressure cover; the pressure cover is connected inside the base, and the lower end face of the pressure cover presses against the upper end face of the stator shield sleeve.

[0009] Furthermore, the base is provided with a base flange, and the valve body is provided with a valve body flange, and the base flange and the valve body flange are fixedly connected by bolts.

[0010] Furthermore, it also includes a valve position detection assembly, which includes a valve position detector, a ball bearing, and a ramp block; the ramp block is fixedly connected to the middle of the valve stem, and a valve body through hole is provided on the valve body corresponding to the ramp block. The valve position detector passes through the valve body through hole and is connected to the ball bearing, and the ball bearing is rotatably connected to the ramp surface of the ramp block.

[0011] Furthermore, the upper part of the valve stem is provided with an external thread, and the inside of the sleeve is provided with an internal thread, wherein the external thread and the internal thread are matched.

[0012] Furthermore, the sealing component is provided with a cone, the diameter of the cone near the valve stem end is larger than the diameter of the other end; a valve seat sealing surface is provided at the intersection of the vertical channel and the horizontal channel, the valve seat sealing surface cooperates with the cone, and when the valve is closed, the cone can block the flow of medium in the horizontal channel.

[0013] Furthermore, the outer circumferential surface of the sleeve is connected to the valve body via bearing No. 3 and bearing No. 4.

[0014] Furthermore, it also includes a slider; the valve stem is provided with a first groove, the valve body is provided with a second groove, the first groove and the second groove are matched, and a slider is provided between the first groove and the second groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the present invention solves the problems of complex structure, high operating noise, short service life and medium leakage of current electric valves; the valve stem has no connection channel with the outside world, eliminating the need for dynamic seals such as packing, thus avoiding medium leakage; the reducer is eliminated, simplifying the overall structure of the electric valve, reducing operating noise and extending service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 AA view;

[0018] Figure 3 This is a cross-sectional view of the stator shielding sleeve;

[0019] In the diagram: 1. Valve seat; 101. Vertical channel; 1011. Valve seat sealing surface; 102. Horizontal channel; 2. Valve stem; 201. Groove No. 1; 3. Sealing component; 301. Cone; 4. Valve body; 401. Valve body center hole; 402. Valve body through hole; 403. Groove No. 2; 5. Sleeve; 6. Rotor shaft; 601. Rotor shaft center hole; 7. Rotor; 8. Strip permanent magnet; 9. Stator; 10. Junction box; 11. Base; 12. Gland; 13. Bearing No. 1; 14. Stator shielding sleeve; 15. Bearing seat; 16. Bearing No. 2; 17. Valve position detector; 18. Ball bearing; 19. Ramp block; 20. Bearing No. 3; 21. Bearing No. 4; 22. Slider. Detailed Implementation

[0020] To make the structure and function of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0021] See appendix Figure 1-3An integrated electric valve includes a valve seat 1, a valve stem 2, a sealing component 3, a valve body 4, a sleeve 5, a rotor shaft 6, a rotor 7, a strip-shaped permanent magnet 8, a stator 9, and a junction box 10. The valve seat 1 has vertically intersecting vertical channels 101 and horizontal channels 102. The lower part of the valve stem 2 moves freely within the vertical channel 101. The lower end of the valve stem 2 is fixedly connected to the sealing component 3, which moves freely within the vertical channel 101 and can block the flow of media in the horizontal channel 102. The upper end of the valve seat 1 is fixedly connected to the lower end of the valve body 4. The valve body 4 has a valve body center hole 401 inside, within which the valve stem 2 moves freely. The sleeve 5 is connected inside the valve body 4. The upper end is fixedly connected to the lower end of the rotor shaft 6. The lower part of the rotor shaft 6 is provided with a rotor shaft center hole 601, which communicates with the inside of the sleeve 5. The valve stem 2 passes through the sleeve 5, and the outside of the valve stem 2 is threadedly connected to the inside of the sleeve 5. The upper part of the valve stem 2 can move freely in a straight line within the rotor shaft center hole 601. The diameter of the rotor shaft center hole 601 is larger than the diameter of the valve stem 2, and the depth of the rotor shaft center hole 601 is larger than the linear stroke of the valve stem 2. When the valve is opened, the valve stem can enter the rotor shaft center hole to reduce the overall height of the integrated electric valve. The upper part of the rotor shaft 6 passes through the rotor 7. The rotor 7 is fitted with a strip-shaped permanent magnet 8, and the strip-shaped permanent magnet 8 is fitted with a stator 9. The stator 9 is connected to the junction box 10.

[0022] The middle section of the rotor is the rotor core, and the outer circumference of the core is a strip-shaped permanent magnet placed along the axis. The strip-shaped permanent magnet has N poles and S poles in equal numbers, and the N poles and S poles are evenly alternated in the circumferential direction.

[0023] The upper part of the valve stem and the sleeve are paired with a helical structure, which can convert the rotational motion of the sleeve into the linear motion of the valve stem. The lower end of the valve stem is connected to a sealing component. The cone of the sealing component matches the sealing surface of the valve seat. When the valve is closed, the sealing component can block the flow of the medium.

[0024] Based on the above technical features, when the integrated electric valve is working, the stator is powered on, and the coil inside the stator generates a rotating magnetic field. The permanent magnet on the rotor is subjected to the force of the rotating magnetic field and generates electromagnetic torque, causing the rotor to rotate and drive the valve stem to move. The rotation of the rotor is converted into the up and down linear motion of the valve stem. The sealing component at the lower end of the valve stem and the sealing surface of the valve seat will approach or even stick to or separate, thereby achieving the purpose of opening or closing the valve. It can also be used to control the degree of opening or closing of the valve and thus adjust the flow rate of the medium.

[0025] It also includes a base 11; the stator 9 is disposed inside the base 11, and the junction box 10 is disposed outside the base 11; the base 11 is fixedly connected to the valve body 4.

[0026] It also includes a stator shielding sleeve 14, a bearing housing 15, a first bearing 13, and a second bearing 16; the lower inner circumferential surface of the base 11 is connected to the lower outer circumferential surface of the stator shielding sleeve 14, the lower inner circumferential surface of the stator shielding sleeve 14 is fixedly connected to the bearing housing 15, and the bearing housing 15 is connected to the rotor shaft 6 through the second bearing 16; the middle part of the stator shielding sleeve 14 is disposed between the strip permanent magnet 8 and the stator 9; the upper inner circumferential surface of the stator shielding sleeve 14 is connected to the rotor 7 through the first bearing 13; the lower end face of the stator shielding sleeve 14 is sealed to the upper end face of the valve body 4.

[0027] It also includes a pressure cover 12; the pressure cover 12 is connected inside the base 11, and the lower end face of the pressure cover 12 presses against the upper end face of the stator shield sleeve 14.

[0028] The base 11 is provided with a base flange, and the valve body 4 is provided with a valve body flange. The base flange and the valve body flange are fixedly connected by bolts. After the base flange and the valve body flange are tightened by bolts, they form a closed cavity that seals the medium inside the valve. The bearing, rotor, valve stem assembly, and bearing housing are arranged inside the closed cavity.

[0029] It also includes a valve position detection assembly, which includes a valve position detector 17, a ball bearing 18, and a ramp block 19; the ramp block 19 is fixedly connected to the middle of the valve stem 2, and a valve body through hole 402 is provided on the valve body 4 corresponding to the ramp block 19. The valve position detector 17 passes through the valve body through hole 402 and is connected to the ball bearing 18, and the ball bearing 18 is rotatably connected to the ramp surface of the ramp block 19.

[0030] The valve stem 2 has an external thread on its upper part, and the sleeve 5 has an internal thread inside, with the external thread matching the internal thread.

[0031] The sealing component 3 is provided with a cone 301, the diameter of the cone 301 at one end near the valve stem 2 is larger than the diameter of the other end; a valve seat sealing surface 1011 is provided at the intersection of the vertical channel 101 and the horizontal channel 102, the valve seat sealing surface 1011 and the cone 301 cooperate with each other, and when the valve is closed, the cone 301 can block the flow of medium in the horizontal channel 102.

[0032] The outer circumference of the sleeve 5 is connected to the valve body 4 by bearing No. 3 20 and bearing No. 4 21.

[0033] It also includes a slider 22; the valve stem 2 is provided with a first groove 201, the valve body 4 is provided with a second groove 403, the first groove 201 and the second groove 403 are matched, and a slider 22 is provided between the first groove 201 and the second groove 403.

[0034] As needed, the integrated electric valve can be designed with the sealing components at the lower end of the valve stem and the valve seat sealing surface matched to form different types of valve structures such as gate valves, globe valves, and regulating valves, thereby achieving different working purposes.

[0035] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship 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 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. Therefore, they should not be construed as limitations on this utility model.

[0036] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. An integrated motorized valve, characterized by: The valve includes a valve seat (1), a valve stem (2), a sealing component (3), a valve body (4), a sleeve (5), a rotor shaft (6), a rotor (7), a strip permanent magnet (8), a stator (9), and a junction box (10). The valve seat (1) has vertically intersecting vertical channels (101) and horizontal channels (102). The lower part of the valve stem (2) moves freely within the vertical channel (101). The lower end of the valve stem (2) is fixedly connected to the sealing component (3). The sealing component (3) moves freely within the vertical channel (101), and the sealing component (3) can block the flow of medium in the horizontal channel (102). The upper end of the valve seat (1) is fixedly connected to the lower end of the valve body (4). The valve body (4) has a valve body center hole (401) inside. The valve stem (2) moves freely within the valve body center hole (401). The valve body (1) 4) Internal connecting sleeve (5), the upper end of the sleeve (5) is fixedly connected to the lower end of the rotor shaft (6), the lower part of the rotor shaft (6) is provided with a rotor shaft center hole (601), the rotor shaft center hole (601) is connected to the inside of the sleeve (5), the valve stem (2) passes through the sleeve (5), and the outside of the valve stem (2) is threadedly connected to the inside of the sleeve (5), the upper part of the valve stem (2) moves freely in a straight line in the rotor shaft center hole (601), the diameter of the rotor shaft center hole (601) is larger than the diameter of the valve stem (2), and the depth of the rotor shaft center hole (601) is larger than the linear stroke of the valve stem (2); the upper part of the rotor shaft (6) passes through the rotor (7), the rotor (7) is fitted with a strip permanent magnet (8), the strip permanent magnet (8) is fitted with a stator (9), and the stator (9) is connected to the junction box (10).

2. An integrated motorized valve according to claim 1, wherein: It also includes a base (11); the stator (9) is disposed inside the base (11), and the junction box (10) is disposed outside the base (11); the base (11) is fixedly connected to the valve body (4).

3. The integrated electric valve according to claim 2, characterized in that: It also includes a stator shield (14), a bearing housing (15), a first bearing (13), and a second bearing (16); the lower inner circumferential surface of the base (11) is connected to the lower outer circumferential surface of the stator shield (14), the lower inner circumferential surface of the stator shield (14) is fixedly connected to the bearing housing (15), and the bearing housing (15) is connected to the rotor shaft (6) through the second bearing (16); the middle part of the stator shield (14) is arranged between the strip permanent magnet (8) and the stator (9); the upper inner circumferential surface of the stator shield (14) is connected to the rotor (7) through the first bearing (13); the lower end face of the stator shield (14) is sealed to the upper end face of the valve body (4).

4. The integrated electric valve according to claim 3, characterized in that: It also includes a pressure cover (12); the pressure cover (12) is connected inside the base (11), and the lower end face of the pressure cover (12) presses against the upper end face of the stator shield sleeve (14).

5. An integrated electric valve according to claim 2, characterized in that: The base (11) is provided with a base flange, and the valve body (4) is provided with a valve body flange. The base flange and the valve body flange are fixedly connected by bolts.

6. The integrated electric valve according to claim 1, characterized in that: It also includes a valve position detection component, which includes a valve position detector (17), a ball bearing (18), and a ramp block (19); the ramp block (19) is fixedly connected to the middle of the valve stem (2), and a valve body through hole (402) is provided on the valve body (4) corresponding to the ramp block (19). The valve position detector (17) passes through the valve body through hole (402) and is connected to the ball bearing (18). The ball bearing (18) is rolled and connected to the ramp surface of the ramp block (19).

7. An integrated electric valve according to claim 1, characterized in that: The valve stem (2) is provided with an external thread on its upper part, and the sleeve (5) is provided with an internal thread inside, and the external thread matches the internal thread.

8. An integrated electric valve according to claim 1, characterized in that: The sealing component (3) is provided with a cone (301), the diameter of the cone (301) near the valve stem (2) is larger than the diameter of the other end; a valve seat sealing surface (1011) is provided at the intersection of the vertical channel (101) and the horizontal channel (102), the valve seat sealing surface (1011) and the cone (301) cooperate with each other, and when the valve is closed, the cone (301) can block the flow of medium in the horizontal channel (102).

9. An integrated electric valve according to claim 1, characterized in that: The outer circumference of the sleeve (5) is connected to the valve body (4) by bearing No. 3 (20) and bearing No. 4 (21).

10. An integrated electric valve according to claim 1, characterized in that: It also includes a slider (22); the valve stem (2) is provided with a first groove (201), the valve body (4) is provided with a second groove (403), the first groove (201) and the second groove (403) are matched, and a slider (22) is provided between the first groove (201) and the second groove (403).

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