CN116428403A

CN116428403A - Actuator and electric valve

Info

Publication number: CN116428403A
Application number: CN202210452438.8A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2022-01-04
Filing date: 2022-04-27
Publication date: 2023-07-14

Abstract

The application provides an executor and motorised valve, including casing part and drive unit, drive unit is located at least partly the inner chamber of casing part still includes action bars and first sealing member, the action bars is located at least partly the inner chamber of casing part, the action bars include first recess, part first sealing member is located first recess, first sealing member can with the casing part offsets in order to restrict the action bars is followed the longitudinal upward movement of executor, the action bars can drive unit's control gear removes in order to break away from the meshing position. The first sealing piece not only improves the sealing performance between the operating rod and the shell component, but also can be matched with the shell component as a limiting piece to enable the shell component to limit the moving stroke of the operating rod, one piece is dual-purpose, and the utilization rate of parts is improved.

Description

Actuator and electric valve

Technical Field

The invention relates to the technical field of fluid control, in particular to an actuator and an electric valve.

Background

The electric valve has wide application field and is mainly used for controlling the on-off of fluid or regulating the flow of fluid in a fluid control system. Electrically operated valves generally comprise two main parts, an actuator and a valve body. FIG. 1A is a perspective view, partly in cross-section, of an actuator according to the background art; FIG. 1B is a schematic cross-sectional view of the actuator of FIG. 1A. As shown in fig. 1A and 1B, the actuator comprises a housing 01, a manual switch 02, a gear set 03 and a motor 05, wherein the motor 05 is in transmission connection with the gear set 03. Pressing the manual switch 02 can abut against one gear in the gear set 03 to disconnect the meshing relationship between the gear and the adjacent gear, so as to disconnect the power source of the motor 05, and facilitate the manual switching of the electric valve by an operator. Specifically, the actuator further includes an elastic plate 04 integrally formed with the housing 01, one end 041 of the elastic plate 04 is connected with the housing 01, the other end 042 of the elastic plate 04 is sleeved with the manual switch 02, and the elastic force of the elastic plate 04 is utilized to provide upward resilience force for the manual switch 02, so that the manual switch 02 is reset until the manual switch is abutted against the buckling part 011 of the housing 01. The actuator does not provide a sealing structure between the housing 01 and the manual switch 02, and there is a risk that external fluid enters the housing 01 to affect the reliability of the motor 05, and there is room for improvement in the actuator of this structure.

Disclosure of Invention

The utility model provides an object provides an executor, including casing part and drive part, drive part is located at least partly the inner chamber of casing part still includes action bars and first sealing member, the action bars is located at least partly the inner chamber of casing part, the action bars include first recess, part first sealing member is located first recess, first sealing member can with the casing part offsets in order to restrict the action bars is followed the longitudinal upward movement of executor, the action bars can drive part's control gear removes in order to break away from the meshing position.

The executor of this application, the leakproofness between action bars and the casing part has not only been improved to first sealing member, still can make the casing part restriction action bars travel of moving with the casing part cooperation as the locating part, and a dual-purpose has improved the utilization ratio of spare part.

The application also provides an electric valve with the actuator and the corresponding effects, the electric valve comprises a valve body part, the valve body part comprises a valve body and a valve core, the electric valve further comprises the actuator, the valve body is fixedly connected with the housing part, the actuator further comprises a motor, the motor is in transmission connection with the control gear, the transmission part comprises an output shaft, the control gear is in transmission connection with the output shaft, and the output shaft is in transmission connection with the valve core; when the control gear is separated from the meshing position, the output shaft can drive the valve core to move under the action of external force.

Drawings

Fig. 1A: a semi-cutaway perspective view of an actuator is given in the background;

fig. 1B: FIG. 1A is a schematic cross-sectional view of an actuator;

fig. 2: the invention provides a partial section schematic diagram of an electric valve;

fig. 3: a partially enlarged schematic illustration at I1 in fig. 2;

fig. 4: a partially enlarged schematic illustration at I2 in fig. 3;

fig. 5: a partial enlarged schematic view at I3 in fig. 4;

fig. 6: a structural schematic diagram of a modification of the structure shown in fig. 5.

Detailed Description

In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

It should be noted that, the terms upper and lower are defined in fig. 2 by the positions of the components in the drawing and the positions of the components with respect to each other, and are only used for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms herein should not be construed to limit the scope of the application as claimed.

FIG. 2 is a schematic partial cross-sectional view of an electrically operated valve according to the present invention; FIG. 3 is an enlarged schematic view of a portion of the portion of FIG. 2 at I1; FIG. 4 is an enlarged partial schematic view at I2 of FIG. 3;

fig. 5 is a partially enlarged schematic view at I3 in fig. 4.

As shown, the electrically operated valve includes an actuator 100 and a valve body member 800.

The actuator 100 comprises a housing part 1, a transmission part 2 and a motor 3. The transmission member 2 is at least partially located in the interior cavity 10 of the housing member and the motor 3 is located in the interior cavity 10 of the housing member. The housing part 1 comprises a first housing 11, a second housing 12 and a base body 13, wherein the first housing 11, the second housing 12 and the base body 13 are respectively formed by plastic injection molding and fixedly connected by screws. Of course, the first housing 11, the second housing 12, and the base 13 may be fixed by bonding or ultrasonic welding.

The motor 3 includes a drive gear 31, the transmission member 2 includes a transmission gear set 21, the transmission gear set 21 includes a control gear 211, and the drive gear 31 is meshed with the control gear 21. That is, the motor 3 is in transmission connection with the control gear 21, and the drive gear 31 can drive the control gear 21 to rotate after the motor 3 is electrified.

The actuator 100 further comprises an operating rod 4, an elastic member 5 and a first sealing member 6. The operating lever 4 is arranged in the housing part 1, the operating lever 4 being at least partially located in the inner cavity 10 of the housing part, the operating lever 4 comprising a first recess 41. The elastic member 5 is a metal spring, and includes a first end 51 and a second end 52, the first end 51 of the elastic member 5 abuts against the housing member 1, and the second end 52 of the elastic member 5 abuts against the operation lever 4. In the longitudinal direction of the actuator 100, the housing part 1 supports the elastic member 5, and the elastic member 5 supports the operation lever 4. By providing the metal elastic member 5, the operational reliability of the operation lever 4 is improved as compared with an elastic plate integrally formed with the housing in the related art.

The first sealing member 6 is an annular sealing ring made of elastic material, one part of the first sealing member 6 is located in the first groove 41 of the operating rod 4, and the other part of the first sealing member 6 is located outside the operating rod 4. The first seal 6 can abut against the housing member 1 under the elastic force of the elastic member 5 to restrict upward movement of the operation lever 4 in the longitudinal direction of the actuator 100. The operating lever 4 is pressed, the operating lever 4 moves downwards along the longitudinal direction of the actuator 100 against the elastic force of the elastic member 5, so that the control gear 211 is driven to move so as to be separated from the driving gear 31, namely, separated from the meshing position, and the power source of the motor 3 is disconnected, so that the operator can conveniently manually operate the opening and closing of the ball valve.

Here, the lever 4 may abut against a gear other than the control gear 211 in the transmission gear set 21, and the gear abutting against the lever 4 may be disengaged from another gear engaged with the gear.

In this case, the first sealing member 6 is sleeved on the operating rod 4 and is partially located in the first groove 41. When the first seal 6 abuts against the housing member 1, the first seal 6 abuts against the outer peripheral wall 411 of the lever 4 forming the first groove 41, and the first seal 6 abuts against the housing member 1 again, i.e., the first seal 6 elastically abuts against the lever 4 and the housing member 1. In this way, the first sealing element 6 not only improves the tightness between the operating rod 4 and the shell component 1, but also can be matched with the shell component 1 as a limiting element, so that the shell component 1 limits the moving stroke of the operating rod 4, one piece is dual-purpose, and the utilization rate of parts is improved.

As shown in fig. 3 and 4, the elastic member 5 is partially sleeved on the operating lever 4, and the operating lever 4 includes a first stepped portion 40 with a stepped surface facing downward. The second housing 12 of the housing member 1 includes a partition portion 121, the first end 51 of the elastic element 5 abuts the partition portion 121, and the second end 52 of the elastic element 5 abuts the first step portion 40.

Further, the partition plate 121 includes a through hole 1210, the lever 4 penetrates the through hole 1210, and the control gear 21 is located below the partition plate 121. The second housing 12 further includes a protruding portion 122, where the protruding portion 122 protrudes upward from the partition portion 121 in the longitudinal direction of the actuator 100, the protruding portion 122 is annular, the elastic member 5 is at least partially located in an inner cavity of the protruding portion 122, and the protruding portion 122 is located on a circumferential outer side of the elastic member 5. The device has the advantages that the position of the elastic piece 5 can be restrained by the protruding part 122, so that the elastic piece 5 is prevented from being inclined to influence the action of the operating rod 4, and the action reliability of the operating rod 4 is further improved.

As shown in fig. 4 and 5, in combination with fig. 3, the first housing 11 of the housing member 1 includes a stepped hole portion 111, and the stepped hole portion 111 includes a protruding portion protruding toward the control gear 211 as a stopper portion 112, and the first seal 6 abuts against an outer surface of the stopper portion 112 near the control gear 211. The outer surface of the stopper 112 abutting against the first seal 6 includes a flat surface 1121 and a tapered surface 1122, the flat surface 1121 being disposed substantially parallel to the partition plate portion 121, the tapered surface 1122 having an inner diameter gradually increasing downward in the longitudinal direction of the actuator 100. That is, the angle formed by the flat surface 1121 and the tapered surface 1122 is an obtuse angle. The flat surface 1121 forms an end surface seal against the first seal 6, and the tapered surface 1122 forms a radial seal against the first seal 6, so that the sealing performance between the housing member 1 and the operation lever 4 can be improved.

Further, as shown in fig. 5, the outer peripheral wall 411 of the operating lever 4 forming the first recess 41 includes a groove bottom surface 412, and the outer diameter of the groove bottom surface 412 gradually becomes smaller downward in the longitudinal direction of the actuator 100. Thus, the first sealing member 6 and the operation lever 4 are assembled to form the accommodating chamber 410, and the first groove 41 includes the accommodating chamber 410. When the first sealing member 6 abuts against the limiting portion 112, the deformed portion of the first sealing member 6 can extend into the accommodating cavity 410, that is, the deformed portion of the first sealing member 6 is located in the accommodating cavity 410. The first sealing element 6 has the advantages that when the first sealing element 6 is deformed under pressure, part of the first sealing element 6 can be accommodated by arranging the accommodating cavity 410, so that the installation reliability of the first sealing element 6 is improved, and the first sealing element is prevented from slipping out of the first groove 41.

Fig. 6 is a schematic structural diagram of a modification of the structure shown in fig. 5.

As shown in fig. 6, the actuator 100 further includes a stopper 8, where the stopper 8 is a metal snap ring or a retainer ring, the stopper 8 is partially located in the first groove 41, the stopper 8 is clamped and fixed with the operating rod 4, the stopper 8 is located below the first seal 6, and the stopper 8 abuts against the first seal 6. In this way, the mounting reliability of the first seal 6 can be improved, and slipping off from the first groove 41 can be prevented.

As shown in fig. 2, the actuator 100 further includes a second sealing member 7, the second sealing member 7 is located above the first sealing member 6, the operating rod 4 further includes a second groove 42, a portion of the second sealing member 7 is located in the second groove 42, and the second sealing member 7 elastically abuts between the operating rod 4 and the first housing 11 of the housing member 1. This can further improve the sealing performance between the housing member 1 and the operation lever 4.

As shown in fig. 4, the stepped hole portion 111 of the first housing 11 includes a first hole wall 1111, a first step surface 1112, a second hole wall 1113, a second step surface 1114, and a third hole wall 1115. First land 1112 connects first land 1111 with second land 1113 and second land 1114 connects second land 1113 with third land 1115. The inner diameter of the first bore wall 1111 is greater than the inner diameter of the second bore wall 1113, and the inner diameter of the second bore wall 1113 is greater than the inner diameter of the third bore wall 1115.

Correspondingly, the operating lever 4 includes a lever head 43, a large diameter section 44, and a small diameter section 45, the large diameter section 44 having an outer diameter larger than that of the small diameter section 45. The outer wall of the lever head 43 is clearance fit with the first aperture wall 1111; the large-diameter section 44 comprises the second groove 42, and the second sealing element 7 is elastically abutted between the large-diameter section 44 and the second hole wall 1113; the small diameter section 45 includes the first groove 41, and the outer wall of the small diameter section 45 is in clearance fit with the third hole wall 1115.

Further, the operating lever 4 further includes a small diameter section 46, the small diameter section 45 has an outer diameter larger than that of the small diameter section 46, and the first step 40 is formed between the small diameter section 45 and the small diameter section 46. The small diameter section 46 penetrates through the through hole 1210 of the partition plate 121, and the elastic member 5 is sleeved outside the small diameter section 46.

In the present embodiment, the first end 51 of the elastic member 5 abuts against the upper surface of the partition plate portion 121, and the second end 52 of the elastic member 5 abuts against the step surface of the first step portion 40. The compression amount of the elastic member 5 (the longitudinal displacement amount of the operation lever 4) is defined by the longitudinal distance of the lower surface of the lever head 43 from the first step surface 1112. It is conceivable that the elastic member 5 may be provided between the lower surface of the head portion 43 and the first step surface 1112 or between the lower surface of the large diameter section 44 and the second step surface 1114, and the function of automatically rebounding the operation lever 4 after being pressed may be realized.

As shown in fig. 2 and 3, the transmission member 2 further includes an output shaft 22, a control gear 211 is in transmission connection with the output shaft 22, and the control gear 211 can drive the output shaft 22 to rotate. Valve body member 800 includes a valve body 801 and a valve spool 802, and valve body 801 is fixedly connected to actuator 100 by a bolt. The output shaft 22 is in driving connection with the spool 802. When the control gear 211 is disengaged from the engaged position, the output shaft 22 can drive the valve core 802 to move under the action of external force, so as to realize the functions of valve opening, valve closing and flow regulation.

The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims

1. The actuator comprises a shell part and a transmission part, wherein the transmission part is at least partially positioned in an inner cavity of the shell part, and the actuator is characterized by further comprising an operating rod and a first sealing part, wherein the operating rod is at least partially positioned in the inner cavity of the shell part, the operating rod comprises a first groove, a part of the first sealing part is positioned in the first groove, the first sealing part can prop against the shell part to limit the operating rod to move upwards along the longitudinal direction of the actuator, and the operating rod can drive a control gear of the transmission part to move to be separated from an engagement position.

2. The actuator of claim 1, wherein the housing member comprises a first housing and a second housing, the first housing is fixedly connected with the second housing, the first housing comprises a limit portion, the first sealing member abuts against an outer surface of the limit portion, which is close to the control gear, the first sealing member is sleeved on the operating rod, the first sealing member abuts against an outer peripheral wall of the operating rod, which forms the first groove, and the actuator further comprises an elastic member, a first end portion of the elastic member abuts against the second housing, and a second end portion of the elastic member abuts against the operating rod.

3. The actuator of claim 2, wherein the peripheral wall includes a bottom surface of the first groove, an outer diameter of the bottom surface of the groove tapering downwardly in a longitudinal direction of the actuator, the first groove including a receiving cavity, the first seal being partially located in the receiving cavity when the first seal abuts the limit portion.

4. The actuator of claim 2, further comprising a stop member, the stop member being a snap ring or a retainer ring, the stop member being partially located in the first groove, the stop member being secured to the lever by a snap fit, the stop member being located below the first seal member, the stop member abutting the first seal member.

5. The actuator of claim 2, wherein the spring housing portion the lever, the lever including a first stepped portion with a stepped surface facing downward, the second housing including a spacer portion, the spring having a first end portion abutting the spacer portion and a second end portion abutting the first stepped portion.

6. The actuator according to claim 5, wherein the diaphragm portion includes a through hole through which the operation lever passes, and the control gear is located below the diaphragm portion; the housing member further includes a projection projecting upward from the partition plate portion in the longitudinal direction of the actuator, the projection being located on the circumferential outer side of the elastic member.

7. The actuator of claim 5, wherein the outer surface includes a flat surface and a tapered surface, the flat surface being disposed parallel to the partition portion, the tapered surface having an inner diameter that gradually increases downward in a longitudinal direction of the actuator.

8. The actuator of claim 2, further comprising a second seal positioned above the first seal, the lever further comprising a second groove, the second seal positioned in the second groove, the second seal resiliently abutting between the lever and the first housing.

9. The actuator according to claim 8, wherein the housing member includes a stepped hole portion including a protruding portion protruding toward the control gear, the protruding portion serving as the stopper portion, the operation lever being pierced in the stepped hole of the stepped hole portion, the stepped hole portion including a first hole wall, a second hole wall, and a third hole wall, an inner diameter of the first hole wall being larger than an inner diameter of the second hole wall, an inner diameter of the second hole wall being larger than an inner diameter of the third hole wall; the operating rod comprises a rod head part, a large-diameter section and a small-diameter section, wherein the outer wall of the rod head part is in clearance fit with the first hole wall, the large-diameter section comprises a second groove, the second sealing element is elastically abutted between the large-diameter section and the second hole wall, the small-diameter section comprises the first groove, and the outer wall of the small-diameter section is in clearance fit with the third hole wall.

10. An electric valve comprising a valve body part, wherein the valve body part comprises a valve body and a valve core, and is characterized by further comprising an actuator as claimed in any one of claims 1-9, wherein the valve body is fixedly connected with the housing part, the actuator further comprises a motor, the motor is in transmission connection with the control gear, the transmission part comprises an output shaft, the control gear is in transmission connection with the output shaft, and the output shaft is in transmission connection with the valve core;

when the control gear is separated from the meshing position, the output shaft can drive the valve core to move under the action of external force.