CN112780821A - Valve electric actuator with preset opening adjustable - Google Patents

Valve electric actuator with preset opening adjustable Download PDF

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Publication number
CN112780821A
CN112780821A CN202011561952.2A CN202011561952A CN112780821A CN 112780821 A CN112780821 A CN 112780821A CN 202011561952 A CN202011561952 A CN 202011561952A CN 112780821 A CN112780821 A CN 112780821A
Authority
CN
China
Prior art keywords
gear
shell
transmission gear
clutch
microswitch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011561952.2A
Other languages
Chinese (zh)
Inventor
王金三
邵志超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
XIAMEN SANIDENG PLASTICS INDUSTRY CO LTD
Original Assignee
XIAMEN SANIDENG PLASTICS INDUSTRY CO LTD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by XIAMEN SANIDENG PLASTICS INDUSTRY CO LTD filed Critical XIAMEN SANIDENG PLASTICS INDUSTRY CO LTD
Priority to CN202011561952.2A priority Critical patent/CN112780821A/en
Publication of CN112780821A publication Critical patent/CN112780821A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D11/00—Clutches in which the members have interengaging parts
    • F16D11/16—Clutches in which the members have interengaging parts with clutching members movable otherwise than only axially
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/046—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/53—Mechanical actuating means with toothed gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0008—Mechanical means
    • F16K37/0016—Mechanical means having a graduated scale

Abstract

The invention discloses a valve electric actuator with adjustable preset opening degree, which comprises a shell, a main shaft, a clutch mechanism, an adjusting mechanism and a switch mechanism, wherein a motor and a transmission gear set are arranged in the shell; the clutch mechanism is connected with the motor and the transmission gear set to control the clutch of the motor and the transmission gear set; the adjusting mechanism comprises a rotatable adjusting part; the switch mechanism comprises a cam fixedly arranged on the main shaft, a swing frame capable of being rotatably sleeved outside the main shaft, a first microswitch fixedly arranged on the swing frame and a second microswitch arranged in the shell, wherein the motor, the first microswitch and the second microswitch are electrically connected, the cam, the first microswitch and the second microswitch are matched with each other to trigger the motor switch, and the angle of the swing frame is controlled by the rotation of the adjusting part. It has the following advantages: the clutch mechanism, the adjusting mechanism and the switch mechanism are mutually matched to improve the adjusting reliability and safety and avoid misoperation in the adjusting process.

Description

Valve electric actuator with preset opening adjustable
Technical Field
The invention relates to the technical field of valve actuators, in particular to a valve electric actuator with adjustable preset opening degree.
Background
The valve electric actuator drives the valve rod to rotate to control the valve to open and close, and the rotating angle of the valve rod determines the opening degree of the valve. The traditional electric actuator drives the valve rod to rotate by a preset angle, and a user cannot perform adjustment; in order to overcome the defects, an electric control mode is proposed to adjust the preset opening degree, but the electric control mode is high in cost and low in control precision.
Disclosure of Invention
The invention provides a valve electric actuator with adjustable preset opening, which overcomes the defects of the valve electric actuator in the background technology.
The technical scheme adopted by the invention for solving the technical problem is as follows: the valve electric actuator with the preset opening adjustable comprises a shell and a main shaft which can be rotatably connected to the shell, wherein a motor and a transmission gear set which is in transmission connection with the main shaft are arranged in the shell; the device also comprises a clutch mechanism, an adjusting mechanism and a switch mechanism; the clutch mechanism is connected with the motor and the transmission gear set to control the clutch of the motor and the transmission gear set; the adjusting mechanism comprises an adjusting part which can rotate relative to the shell, and the adjusting part is provided with a first adjusting gear; the switch mechanism comprises a cam fixedly arranged on a main shaft, a swing frame capable of being rotatably sleeved outside the main shaft, a first microswitch fixedly arranged on the swing frame and a second microswitch arranged in a shell, wherein the motor, the first microswitch and the second microswitch are electrically connected, the cam, the first microswitch and the second microswitch are matched with each other to trigger a motor switch, the swing frame is provided with a second adjusting gear, and the first adjusting gear of the adjusting part is meshed with the second adjusting gear of the swing frame to rotate through the adjusting part to control the angle of the swing frame.
In one embodiment: the swing frame comprises two first sleeve plates and a first fixing frame, the first sleeve plates can be rotatably sleeved outside the main shaft, first lugs are convexly arranged on the first sleeve plates, and the first fixing frame is fixedly connected between the first lugs of the two first sleeve plates; the two first sleeve plates are respectively contacted with two end surfaces of the cam, and the first microswitch is fixedly arranged on the first fixing frame; the shell is also internally provided with a second sleeve plate which can be rotatably sleeved outside the main shaft, the second sleeve plate is convexly provided with a second lug, the second lug is fixedly connected with a second fixing frame, and the second microswitch is fixedly arranged on the second fixing frame.
In one embodiment: the second lug is provided with an arc-shaped groove arranged along the axis of the main shaft, the second sleeve plate and the second lug are placed in the shell, and a screw is additionally arranged to penetrate through the arc-shaped groove and be locked on the shell.
In one embodiment: the upper end of the adjusting part can rotate to penetrate through the shell, and the upper end of the adjusting part extending out of the shell is fixedly provided with a knob.
In one embodiment: an opening degree indicating disc is fixedly arranged on the shell, an indicating needle is fixedly arranged on the swing frame, and the indicating needle is parallel to the axis of the main shaft and penetrates through the shell to correspond to the opening degree indicating disc.
In one embodiment: the end of the motor is provided with a driving gear; the clutch mechanism comprises a clutch gear set, the clutch gear set comprises clutch teeth and a first transmission gear, the clutch teeth and the drive gear at the separation positions can slide between the separation positions and the meshing positions relative to the shell through the clutch gear set, the clutch teeth and the drive gear at the separation positions are separated, the clutch teeth and the drive gear at the meshing positions are meshed, and the first transmission gear is in transmission connection with the clutch teeth and the transmission gear set.
In one embodiment: the clutch gear set further comprises a second transmission gear, a first gear shaft, a third transmission gear and a second gear shaft, the clutch gear and the third transmission gear are coaxially and fixedly connected to the first gear shaft, the first transmission gear and the second transmission gear are coaxially and fixedly connected to the second gear shaft, the third transmission gear is meshed with the second transmission gear, and the first gear shaft and the second gear shaft synchronously slide.
In one embodiment: the clutch gear set is arranged in the shell; the clutch mechanism further comprises a sliding frame, the first gear shaft and the second gear shaft are arranged in parallel and are connected to the sliding frame in a rotating mode, the first transmission gear is a worm, the clutch gear, the second transmission gear and the third transmission gear are located in the sliding frame, the first transmission gear can rotate to extend out of the sliding frame, an extension rod extending out of the lower shell is arranged on the sliding frame, and a handle is arranged at the tail end of the extension rod.
In one embodiment: the lower end of the main shaft is concavely provided with a star-shaped transmission groove, the shell is provided with a through hole, and the lower end of the main shaft is correspondingly matched and positioned in the through hole.
In one embodiment: the shell comprises an upper cover, a middle plate and a lower shell which are fixedly connected in sequence from top to bottom, wherein the upper cover, the middle plate and the lower shell are all made of plastics; the transmission gear is assembled in the lower shell, the adjusting mechanism and the switch mechanism are connected between the middle plate and the upper cover, and the main shaft penetrates through the middle plate and the upper cover; the upper cover is concavely provided with a groove, a screw and a sealing plug are additionally arranged, the screw is arranged in the groove and is locked with the upper cover and the middle plate, and the sealing plug seals the notch of the first groove.
Compared with the background technology, the technical scheme has the following advantages:
the valve electric actuator also comprises a clutch mechanism, an adjusting mechanism and a switch mechanism, and the adjusting part drives the swing frame to swing so as to change the angles of the swing frame and a first microswitch arranged on the swing frame and change the central angle between the first microswitch and a second microswitch, namely change the preset opening degree of the valve; and moreover, the clutch mechanism, the adjusting mechanism and the switch mechanism are mutually matched, so that the adjusting reliability and safety are improved, and misoperation in the adjusting process is avoided.
The clutch gear set can slide between a separation position and a meshing position relative to the shell, the clutch tooth at the separation position is separated from the driving gear, the clutch tooth at the meshing position is meshed with the driving gear, and the first transmission gear is in transmission connection with the clutch gear and the transmission gear set, so that the clutch gear set is convenient, stable and reliable to separate and control.
The clutch teeth and the third transmission gear are coaxially and fixedly connected to the first gear shaft, the first transmission gear and the second transmission gear are coaxially and fixedly connected to the second gear shaft, the third transmission gear is meshed with the second transmission gear, and the first gear shaft and the second gear shaft synchronously slide, so that stable and reliable clutch control can be ensured, speed can be reduced, and the clutch device is compact in structure.
Clutch teeth, the second transmission gear and the third transmission gear are located in the sliding frame, the first transmission gear can rotate to extend out of the sliding frame, an extension rod extending out of the lower shell is arranged on the sliding frame, and a handle is arranged at the tail end of the extension rod.
Drawings
The invention is further described with reference to the following figures and detailed description.
Fig. 1 is a perspective view of an embodiment of an electric valve actuator.
Fig. 2 is a second perspective view of an embodiment of an electric valve actuator.
Fig. 3 is a schematic cut-away view of an embodiment of an electric valve actuator.
Fig. 4 is an exploded perspective view of an embodiment of an electric actuator for a valve.
Fig. 5 is a schematic perspective sectional view of a transmission gear set, a clutch mechanism, and the like according to an embodiment.
Fig. 6 is a second perspective sectional view of the transmission gear set and the clutch mechanism according to the embodiment.
Fig. 7 shows an example of an embodiment of an electric actuator for a valve.
Detailed Description
Referring to fig. 1 to 6, the valve electric actuator with adjustable preset opening degree includes a housing 1, a main shaft 2 rotatably connected to the housing 1, a clutch mechanism 3, an adjusting mechanism 4, and a switch mechanism 5.
A motor 11 and a transmission gear set 12 which is in transmission connection with the main shaft 2 are arranged in the shell 1; the clutch mechanism 3 is connected with the motor 11 and the transmission gear set 12 to control the clutch of the motor and the transmission gear set; the adjusting mechanism 4 comprises an adjusting part 41 which can rotate relative to the shell 1, and the adjusting part 41 is provided with a first adjusting gear 42; the switch mechanism 5 comprises a cam 51 fixedly arranged on the main shaft 2, a swing frame capable of being rotatably sleeved outside the main shaft 2, a first microswitch 53 fixedly arranged on the swing frame and a second microswitch 54 arranged in the shell 1, wherein the motor 11, the first microswitch 53 and the second microswitch 54 are electrically connected, the cam 51, the first microswitch 53 and the second microswitch 54 are matched with each other to trigger the switch of the motor 11, and the microswitch control switch can be touched through the cam 51 to realize automatic switch control; the swing frame is provided with a second adjusting gear 55, the first adjusting gear 42 of the adjusting part 41 is meshed with the second adjusting gear 54 of the swing frame to control the angle of the swing frame through the rotation of the adjusting part 41, so that the central angles of the two micro switches can be controlled through the rotation of the adjusting part, and the opening degree of the valve can be controlled.
The shell 1 comprises an upper cover 13, a middle plate 14 and a lower shell 15 which are fixedly connected in sequence from top to bottom, wherein the upper cover 13, the middle plate 14 and the lower shell 15 are all made of plastics, and the shell has a good anti-corrosion effect and light weight. The first screw 141 is arranged to lock the middle plate 14 and the lower shell 15 from top to bottom, the screw head of the first screw 141 is exposed between the upper cover 13 and the middle plate 14, the groove 131 is concavely arranged on the upper cover 13, the second screw 132 and the sealing plug 133 are arranged, the second screw 132 is arranged in the groove 131 and locks the upper cover 13 and the middle plate 14, the sealing plug 133 seals the notch of the first groove 132 to prevent the second screw from being corroded, and the structure realizes sealing and hiding and prevents the screw from being corroded. The upper cover 13, the lower cover 15 and the sealing plug 133 are made of ABS material, and the middle plate 14 is made of 14PA6+ 30% GF material.
The swing frame comprises two first sleeve plates 521 and a first fixing frame 522, the first sleeve plates 521 can be rotatably sleeved outside the main shaft 2, the first sleeve plates 521 are convexly provided with first lugs, and the first fixing frame 522 is fixedly connected between the first lugs of the two first sleeve plates 521; the two first set plates 521 respectively lean against two end faces of the cam 51, and the first microswitch 53 is fixedly arranged on the first fixing frame 522, so that the positioning and assembling are convenient, the structure is compact, stable and reliable, and the adjustment is convenient and accurate; the shell 1 is also provided with a second sleeve plate 161, the second sleeve plate 161 can be rotatably sleeved outside the main shaft 2, the second sleeve plate 161 is convexly provided with a second lug, the second lug is fixedly connected with a second fixing frame 162, and the second microswitch 54 is fixedly arranged on the second fixing frame 162, so that the structure is compact, and the positioning and assembly are convenient; the second lug is provided with an arc-shaped groove 163 arranged along the axis of the main shaft, the second sleeve plate and the second lug are placed in the middle plate 14, and a third screw is arranged to penetrate through the arc-shaped groove and be locked on the middle plate 14, so that the angle of the second microswitch can be adjusted.
The upper end of the adjusting part 41 can rotate to pass through the upper cover 13, and the upper end of the adjusting part extending out of the upper cover 13 is fixedly provided with a knob 411 for facilitating adjustment of a user. The opening indicating disc 131 is fixedly arranged on the upper cover 13, the indicating needle 523 is fixedly arranged on the swing frame, the indicating needle is parallel to the axis of the main shaft and penetrates through the shell to correspond to the opening indicating disc, so that a user can visually observe and adjust the opening, if the opening arrow points to 90 degrees, the output shaft is opened by 90 degrees, the opening arrow points to 45 degrees, and the output shaft is opened by 45 degrees.
The end of the motor 11 is provided with a driving gear 111; the clutch mechanism 3 includes a clutch gear set including a clutch tooth 31 and a first transmission gear 32, and the clutch tooth 31 and the drive gear 111 at the disengaged position can slide relative to the housing 1 between the disengaged position and the engaged position through the clutch gear set, the clutch tooth 31 and the drive gear 111 at the engaged position are disengaged, the clutch tooth 31 and the drive gear 111 at the engaged position are engaged, and the first transmission gear 32 is in transmission connection with the clutch tooth 31 and the transmission gear set 12. The clutch gear set further comprises a second transmission gear 33, a first gear shaft 34, a third transmission gear 35 and a second gear shaft 36, the clutch teeth 31 and the third transmission gear 35 are coaxially and fixedly connected to the first gear shaft 34, the first transmission gear 32 and the second transmission gear 33 are coaxially and fixedly connected to the second gear shaft 36, the third transmission gear 35 is meshed with the second transmission gear 33, and the first gear shaft 34 and the second gear shaft 35 synchronously slide; the clutch mechanism 3 further comprises a sliding frame 37, the first gear shaft 35 and the second gear shaft 36 are arranged in parallel and are rotatably connected to the sliding frame, the clutch teeth 31, the second transmission gear 33 and the third transmission gear 35 are all positioned in the sliding frame, the first transmission gear 32 can rotatably extend out of the sliding frame, and the first transmission gear 32 is a worm. By adopting the clutch structure, the clutch is stable and reliable, and the operation is convenient and simple.
The transmission gear set 12 and the clutch mechanism 3 are arranged in the lower shell 15, the sliding frame 37 is provided with an extension bar extending out of the lower shell, and the tail end of the extension bar is provided with a handle 38; the adjusting mechanism 4 and the opening and closing mechanism 5 are connected between the middle plate and the upper cover through which the main shaft 2 passes.
The lower end of the main shaft 2 is concavely provided with a star-shaped transmission groove 21, the lower shell 15 is provided with a through hole, and the lower end of the main shaft is correspondingly matched and positioned in the through hole. The star-shaped transmission groove 21 is a standard star-shaped hole, a valve rod of the valve can be directly sleeved in the star-shaped transmission groove, a support and a coupler are not needed, the structure is simplified, the structure is simple and compact, and the assembly is convenient and rapid. As shown in fig. 7, the star-shaped transmission groove 21 of the main shaft of the electric actuator can be directly sleeved on the valve rod of the valve 6, and the operation is convenient.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.

Claims (10)

1. The valve electric actuator with the preset opening adjustable comprises a shell and a main shaft which can be rotatably connected to the shell, wherein a motor and a transmission gear set which is in transmission connection with the main shaft are arranged in the shell; the method is characterized in that: the device also comprises a clutch mechanism, an adjusting mechanism and a switch mechanism; the clutch mechanism is connected with the motor and the transmission gear set to control the clutch of the motor and the transmission gear set; the adjusting mechanism comprises an adjusting part which can rotate relative to the shell, and the adjusting part is provided with a first adjusting gear; the switch mechanism comprises a cam fixedly arranged on a main shaft, a swing frame capable of being rotatably sleeved outside the main shaft, a first microswitch fixedly arranged on the swing frame and a second microswitch arranged in a shell, wherein the motor, the first microswitch and the second microswitch are electrically connected, the cam, the first microswitch and the second microswitch are matched with each other to trigger a motor switch, the swing frame is provided with a second adjusting gear, and the first adjusting gear of the adjusting part is meshed with the second adjusting gear of the swing frame to rotate through the adjusting part to control the angle of the swing frame.
2. The electric actuator of valve with adjustable preset opening degree of claim 1, wherein: the swing frame comprises two first sleeve plates and a first fixing frame, the first sleeve plates can be rotatably sleeved outside the main shaft, first lugs are convexly arranged on the first sleeve plates, and the first fixing frame is fixedly connected between the first lugs of the two first sleeve plates; the two first sleeve plates are respectively contacted with two end surfaces of the cam, and the first microswitch is fixedly arranged on the first fixing frame; the shell is also internally provided with a second sleeve plate which can be rotatably sleeved outside the main shaft, the second sleeve plate is convexly provided with a second lug, the second lug is fixedly connected with a second fixing frame, and the second microswitch is fixedly arranged on the second fixing frame.
3. The electric actuator of a valve with adjustable preset opening degree according to claim 2, wherein: the second lug is provided with an arc-shaped groove arranged along the axis of the main shaft, the second sleeve plate and the second lug are placed in the shell, and a screw is additionally arranged to penetrate through the arc-shaped groove and be locked on the shell.
4. The electric actuator of valve with adjustable preset opening degree of claim 1, wherein: the upper end of the adjusting part can rotate to penetrate through the shell, and the upper end of the adjusting part extending out of the shell is fixedly provided with a knob.
5. The electric actuator of valve with adjustable preset opening degree of claim 1, wherein: an opening degree indicating disc is fixedly arranged on the shell, an indicating needle is fixedly arranged on the swing frame, and the indicating needle is parallel to the axis of the main shaft and penetrates through the shell to correspond to the opening degree indicating disc.
6. The electric actuator of valve with adjustable preset opening degree of claim 1, wherein: the end of the motor is provided with a driving gear; the clutch mechanism comprises a clutch gear set, the clutch gear set comprises clutch teeth and a first transmission gear, the clutch teeth and the drive gear at the separation positions can slide between the separation positions and the meshing positions relative to the shell through the clutch gear set, the clutch teeth and the drive gear at the separation positions are separated, the clutch teeth and the drive gear at the meshing positions are meshed, and the first transmission gear is in transmission connection with the clutch teeth and the transmission gear set.
7. The electric actuator of a valve with adjustable preset opening degree according to claim 6, wherein: the clutch gear set further comprises a second transmission gear, a first gear shaft, a third transmission gear and a second gear shaft, the clutch gear and the third transmission gear are coaxially and fixedly connected to the first gear shaft, the first transmission gear and the second transmission gear are coaxially and fixedly connected to the second gear shaft, the third transmission gear is meshed with the second transmission gear, and the first gear shaft and the second gear shaft synchronously slide.
8. The electric actuator of a valve with adjustable preset opening degree according to claim 7, wherein: the clutch gear set is arranged in the shell; the clutch mechanism further comprises a sliding frame, the first gear shaft and the second gear shaft are arranged in parallel and are connected to the sliding frame in a rotating mode, the first transmission gear is a worm, the clutch gear, the second transmission gear and the third transmission gear are located in the sliding frame, the first transmission gear can rotate to extend out of the sliding frame, an extension rod extending out of the lower shell is arranged on the sliding frame, and a handle is arranged at the tail end of the extension rod.
9. The electric actuator of valve with adjustable preset opening degree of claim 1, wherein: the lower end of the main shaft is concavely provided with a star-shaped transmission groove, the shell is provided with a through hole, and the lower end of the main shaft is correspondingly matched and positioned in the through hole.
10. The electric actuator of valve with adjustable preset opening degree of claim 1, wherein: the shell comprises an upper cover, a middle plate and a lower shell which are fixedly connected in sequence from top to bottom, wherein the upper cover, the middle plate and the lower shell are all made of plastics; the transmission gear is assembled in the lower shell, the adjusting mechanism and the switch mechanism are connected between the middle plate and the upper cover, and the main shaft penetrates through the middle plate and the upper cover; the upper cover is concavely provided with a groove, a screw and a sealing plug are additionally arranged, the screw is arranged in the groove and is locked with the upper cover and the middle plate, and the sealing plug seals the notch of the first groove.
CN202011561952.2A 2020-12-25 2020-12-25 Valve electric actuator with preset opening adjustable Pending CN112780821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011561952.2A CN112780821A (en) 2020-12-25 2020-12-25 Valve electric actuator with preset opening adjustable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011561952.2A CN112780821A (en) 2020-12-25 2020-12-25 Valve electric actuator with preset opening adjustable

Publications (1)

Publication Number Publication Date
CN112780821A true CN112780821A (en) 2021-05-11

Family

ID=75752468

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011561952.2A Pending CN112780821A (en) 2020-12-25 2020-12-25 Valve electric actuator with preset opening adjustable

Country Status (1)

Country Link
CN (1) CN112780821A (en)

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