CN218152602U

CN218152602U - Valve actuator

Info

Publication number: CN218152602U
Application number: CN202122374038.3U
Authority: CN
Inventors: 吴辰浩
Original assignee: Wuxi Yizhiwei Electric Technology Co ltd
Current assignee: Wuxi Yizhiwei Electric Technology Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-12-27
Anticipated expiration: 2031-09-30

Abstract

The utility model relates to a valve auxiliary member specifically says so and is used for driving valve rod pivoted valve actuator. It is characterized by that it includes a shell body, in the shell body interior a rotating shaft, a motor and a controller are set, and the controller is equipped with a wire hole, and the wire cable is passed through the wire hole and extended out. One end of the rotating shaft is an output end, the output end of the rotating shaft penetrates through the shell to extend outside, and the output end of the rotating shaft is in rotating fit with the shell. A transmission mechanism is arranged between an output shaft of the motor and the rotating shaft; and a position detection device for detecting the rotation angle of the rotating shaft is arranged in the shell. The motor is electrically connected with the controller, and the position detection device is in electrical signal connection with the controller. The valve adopting the valve actuator has wide application range and can be remotely controlled.

Description

Valve actuator

Technical Field

The utility model relates to a valve auxiliary member specifically says so and is used for driving valve rod pivoted valve actuator.

Background

A valve is a device for controlling the direction, pressure, and flow rate of a fluid in a fluid system, and is a device capable of controlling the flow rate of a medium (liquid, gas, or powder) in a pipe or equipment by flowing or stopping the medium. The valve mainly comprises a valve body and a valve core. When the valve works, the valve is opened and closed through the action of the valve core.

At present, two valve core action modes of the traditional valve are provided, one mode is to control the action of the valve core by adopting electromagnetic force, namely an electromagnetic valve. The other is a common mechanical valve which controls the action of the valve core by manpower. However, due to the reasons of the electromagnetic valve, the electromagnetic valve has higher requirements on medium cleanliness, a medium containing particles cannot be suitable for use, a viscous medium cannot be suitable for use, and the application range is smaller. Ordinary mechanical valve can only pass through the manpower drive, can not remote control.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a valve actuator, but the valve application range who adopts this valve actuator is wide, remote control.

In order to solve the problems, the following technical scheme is provided:

the utility model discloses a valve actuator's characteristics are including the casing, have pivot, motor and controller in the casing, and the controller has the cable, and wired hole on the casing, cable pass line hole stretch out outside. One end of the rotating shaft is an output end, the output end of the rotating shaft penetrates through the shell to extend out, and the output end of the rotating shaft is in rotating fit with the shell. A transmission mechanism is arranged between an output shaft of the motor and the rotating shaft; a position detection device for detecting the rotation angle of the rotating shaft is arranged in the shell. The motor is electrically connected with the controller, and the position detection device is in electrical signal connection with the controller.

The transmission mechanism comprises a driving gear, a reduction gear set and a driven gear; the driving gear is concentrically fixed on an output shaft of the motor, the driven gear is sleeved on the rotating shaft, the driven gear and the rotating shaft are axially fixed and circumferentially rotate to match, and the reduction gear set is located between the driving gear and the driven gear. Arc-shaped grooves are uniformly distributed on the side surface of the driven gear corresponding to the output end of the rotating shaft along the circumferential direction of the driven gear, the circle centers of the arc-shaped grooves are all positioned on the axis of the driven gear, the depth of the arc-shaped grooves is gradually reduced from one end to the other end, the depth of the shallow ends of the arc-shaped grooves is zero, and the orientation of the deep ends and the orientation of the shallow ends of the arc-shaped grooves are consistent. A driving disc is concentrically arranged on the rotating shaft at one side of the driven gear corresponding to the arc-shaped groove, the driving disc and the rotating shaft are matched in an axially sliding and circumferentially fixed manner, arc-shaped bosses are uniformly distributed on the disc surface of the driving disc close to the driven gear along the circumferential direction, the circle centers of the arc-shaped bosses are all arranged on the axis of the rotating shaft, the heights of the arc-shaped bosses are gradually reduced from one ends to the other ends, and the thicknesses of the short ends of the arc-shaped bosses are zero. A reset spring is arranged between one side of the transmission disc far away from the driven gear and the inner wall of the shell, the reset spring is sleeved on the rotating shaft, and the arc-shaped grooves and the arc-shaped protrusions are arranged in a one-to-one correspondence mode.

A first abdicating hole is arranged on the side surface of the shell corresponding to one end of the rotating shaft far away from the output end, the end of the rotating shaft is positioned in the first abdicating hole, and the rotating shaft and the first abdicating hole are matched in a rotating sealing manner, and a manual operation hole matched with the wrench is arranged on the end face of one end of the rotating shaft far away from the output end.

The reduction gear set comprises a primary reduction gear, a secondary reduction gear and a final reduction gear, wherein the primary reduction gear, the secondary reduction gear and the final reduction gear respectively comprise a large gear and a small gear which are coaxially fixed. The number of the secondary reducing gears is not less than three, the large gear of the primary reducing gear is meshed with the driving gear, the small gear of the primary reducing gear is meshed with the large gear of the primary reducing gear, in the secondary reduction gear, from the first stage to the last stage, the small gear is meshed with the large gear step by step, and the small gear of the last stage secondary reduction gear is meshed with the driven gear. The secondary reduction gears are coaxially arranged at intervals.

The shell is divided into a base and an outer cover from the back to the front, an annular outer boss is arranged on the outer side wall around the opening of the base, the mouth of the outer cover covers the mouth of the base, and the end face of the mouth of the outer cover is abutted to the annular outer boss. The output end of the rotating shaft is positioned on the base, and the rotating shaft is matched with the base in a rotating and sealing manner; the butt joint of the base and the outer cover is provided with a semicircular hole, the two semicircular holes are connected in an opposite mode to form the wire hole, and the cable is tightly matched with the wire hole. The middle cover comprises a cover plate, one side of the cover plate extends out of the annular enclosing plate from the periphery, annular inner bosses are arranged on the inner side walls of the periphery of the opening of the base, one side of the cover plate, far away from the annular enclosing plate, abuts against the annular inner bosses, and one side of the annular enclosing plate, far away from the cover plate, extends into the outer cover. The rotating shaft is perpendicular to the cover plate, and two ends of the rotating shaft respectively extend out of two sides of the cover plate. The transmission mechanism is positioned between the cover plate and the base, the transmission disc is provided with a central shaft, a waist-shaped first central hole is arranged on the central shaft, the section of the rotating shaft corresponding to the transmission disc is waist-shaped, the transmission disc is sleeved on the rotating shaft through the first central hole, so that the transmission disc and the rotating shaft are in axial sliding and circumferential fixed fit, the driven gear is provided with a second central hole, one side of driven gear offsets with the apron, and driven gear's opposite side has central pit, the arc wall all is located the hole bottom of central pit, and driven gear passes through the second centre bore cover on the center pin, the driving disc is located driven gear one side that central pit corresponds, and the external diameter of driving disc is less than the internal diameter of central pit, reset spring is located between driving disc and base. The base has a chamber for receiving a reduction gear set. Keep away from apron one side of base there is the spacing pit, and the motor one end that the output shaft corresponds offsets with the hole end of spacing pit, and has the second hole of stepping down on the hole end of spacing pit, and the output shaft of motor passes the second hole of stepping down and stretches out to the base in, the driving gear is fixed on the section motor output shaft that is arranged in the base, and the motor one end of keeping away from the output shaft offsets with the enclosing cover to fix the motor in the casing.

And a blind hole matched with the valve rod of the valve in shape is formed in the end face of the output end of the rotating shaft.

The controller is provided with three state indicating lamps, light pipes are arranged between the indicating lamps and the front side of the shell, the light pipes are integrally connected with the shell, and the thickness of the shell wall of the section of the shell corresponding to the inner cavity of each light pipe is smaller than that of the shell walls of other positions of the shell.

The position detection device comprises two micro switches, the two micro switches are positioned on one side of the rotating shaft and are sequentially arranged side by side along the axial direction of the rotating shaft, elastic pieces of the micro switches face the rotating shaft, two flanges which are arranged radially outwards are arranged on the rotating shaft corresponding to the micro switches, the two flanges corresponding to the same micro switch are positioned at two ends of a radial line of the rotating shaft, and the radial lines where the flanges of different micro switches are positioned are mutually vertical; the micro switches are all in electric signal connection with the controller.

The position detection device comprises a grating disc and a photoelectric switch, the grating disc is concentrically fixed on the rotating shaft, the photoelectric switch is positioned on one side of the rotating shaft, and the grating disc penetrates through a detection port of the photoelectric switch. The photoelectric switch is in electric signal connection with the controller.

By adopting the scheme, the method has the following advantages:

because the utility model discloses a there are pivot, motor and controller in valve actuator's the casing, the cable is wired to the controller, wired hole on the casing, the cable passes the line hole and stretches out outside, the one end of pivot is the output, the output of pivot passes the casing and stretches out outside, there is drive mechanism between the output shaft of motor and pivot, has the position detection device who is used for detecting pivot turned angle in the casing, motor and position detection device all are the electricity with the controller and are connected. During the use, link to each other the cable with the power, link to each other controller and outside server, link to each other the output of motor and the valve rod of ordinary mechanical valve. The valve actuator is used together with a common mechanical valve, so that the common mechanical valve has no requirement on medium cleanliness, can be applied to granular media and viscous media, and has a wide application range. And moreover, a valve opening and closing signal is sent to the server through the control terminal, the controller controls the motor to be started and stopped according to the valve opening and closing signal and the position information transmitted by the position detection device, and the motor drives the valve body to be opened and closed through the valve rod in the rotating process, so that remote control is realized.

Drawings

Fig. 1 is a schematic structural diagram of the valve actuator of the present invention;

FIG. 2 isbase:Sub>A schematic sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic perspective view of the valve actuator of the present invention after the outer cover is hidden;

fig. 4 is a schematic perspective view of the valve actuator of the present invention after hiding the cover and the controller (embodiment one);

fig. 5 is a schematic perspective view of the valve actuator of the present invention after hiding the cover and the controller (embodiment two);

fig. 6 is a schematic structural view of the valve actuator of the present invention after hiding the base;

fig. 7 is a schematic perspective view of an outer cover of the valve actuator of the present invention;

fig. 8 is an exploded view of the driven gear and the driving plate of the valve actuator according to the present invention;

fig. 9 is a schematic structural diagram of a driving disc in the valve actuator of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example one

As shown in 1~4, 6~9, the valve actuator of the present invention comprises a housing, a rotating shaft 5, a motor 20 and a controller 9 are disposed in the housing, the controller 9 is a circuit board, the controller 9 has a cable 3, the housing has a wire hole, and the cable 3 extends out through the wire hole. One end of the rotating shaft 5 is an output end, the output end of the rotating shaft 5 penetrates through the shell to extend out, and the output end of the rotating shaft 5 is in rotating fit with the shell. A transmission mechanism is arranged between an output shaft of the motor 20 and the rotating shaft 5; and a position detection device for detecting the rotation angle of the rotating shaft 5 is arranged in the shell. The motor 20 is electrically connected with the controller 9, and the position detection device is electrically connected with the controller 9.

To facilitate manual operation, the transmission mechanism comprises a driving gear 23, a reduction gear set and a driven gear 14; the driving gear 23 is concentrically fixed on an output shaft of the motor 20, the driven gear 14 is sleeved on the rotating shaft 5, the driven gear 14 is axially fixed and circumferentially rotated with the rotating shaft 5, and the reduction gear set is located between the driving gear 23 and the driven gear 14. Arc-shaped grooves 29 are uniformly distributed on the side face of the driven gear 14 corresponding to the output end of the rotating shaft 5 along the circumferential direction of the driven gear, the centers of the arc-shaped grooves 29 are all located on the axis of the driven gear 14, the depths of the arc-shaped grooves 29 are gradually reduced from one end to the other end of the arc-shaped grooves 29, the depths of the shallow ends of the arc-shaped grooves 29 are zero, and the orientations of the deep ends and the shallow ends of the arc-shaped grooves 29 are consistent. The rotating shaft 5 on one side of the driven gear 14 corresponding to the arc-shaped groove 29 is concentrically provided with a transmission disc 15, the transmission disc 15 is matched with the rotating shaft 5 in an axial sliding and circumferential fixing manner, arc-shaped bosses 33 are uniformly distributed on the disc surface of the transmission disc 15 close to the driven gear 14 along the circumferential direction of the transmission disc, the circle centers of the arc-shaped bosses 33 are all arranged on the axis of the rotating shaft 5, the heights of the arc-shaped bosses 33 gradually become lower from one end to the other end of the arc-shaped bosses, and the thicknesses of the short ends of the arc-shaped bosses are zero. A return spring 16 is arranged between one side of the transmission disc 15 far away from the driven gear 14 and the inner wall of the shell, the return spring 16 is sleeved on the rotating shaft 5, and the arc-shaped grooves 29 and the arc-shaped protrusions are arranged in a one-to-one correspondence mode. There is the first hole of stepping down on the casing side that 5 one end of that pivot that keeps away from the output corresponds, and 5 this ends of pivot are located the first downthehole of stepping down, and pivot 5 and the first cooperation of stepping down of form of rotating seal between the hole, have the manual operation hole 6 with spanner looks adaptation on the terminal surface of 5 one end of that pivot that keep away from the output.

In order to save space, the reduction gear set comprises a primary reduction gear 24, a secondary reduction gear 25 and a final reduction gear 26, the primary reduction gear 24, the secondary reduction gear 25 and the final reduction gear 26 each comprising a coaxially fixed gearwheel and pinion. The number of the secondary reduction gears 25 is not less than three, the large gear of the primary reduction gear 24 is meshed with the driving gear 23, the small gear of the primary reduction gear 24 is meshed with the large gear of the primary reduction gear 25, the small gear of the secondary reduction gear 25 is meshed with the large gear from the first stage to the last stage in the secondary reduction gear 25 step by step, and the small gear of the last secondary reduction gear 25 is meshed with the driven gear 14. The secondary reduction gears 25 are coaxially arranged at intervals.

The casing is divided into base 1 and enclosing cover 2 from its back to openly, and base 1 and enclosing cover 2 are the working of plastics, have annular outer boss 11 on 1 oral area of base lateral wall all around, the oral area cover of enclosing cover 2 is on 1 oral area of base, and 2 oral area terminal surfaces of enclosing cover offset with annular outer boss 11, adopt the hot melt technology closely fixed continuous between the oral area of enclosing cover 2 and annular boss to realize sealing between the two. The output end of the rotating shaft 5 is positioned on the base 1, and the rotating shaft 5 is matched with the base 1 in a rotating and sealing manner. The butt joint of base 1 and enclosing cover 2 all has semi-circular hole 27, and two semi-circular hole 27 butt joints become the line hole, be closely matched with between cable 3 and the line hole. The mouth of the base 1 is provided with a middle cover, the middle cover comprises a cover plate 10, one side of the cover plate 10 extends out of an annular enclosing plate 12, the inner side wall of the periphery of the mouth of the base 1 is provided with an annular inner boss 13, one side of the cover plate 10 far away from the annular enclosing plate 12 is abutted against the annular inner boss 13, and one side of the annular enclosing plate 12 far away from the cover plate 10 extends into the outer cover 2. The rotating shaft 5 is perpendicular to the cover plate 10, and two ends of the rotating shaft 5 respectively extend out of two sides of the cover plate 10. The transmission mechanism is located between the cover plate 10 and the base 1, the transmission disc 15 is provided with a central shaft 31, a waist-shaped first central hole 32 is formed in the central shaft 31, the section of the rotating shaft 5 corresponding to the transmission disc 15 is waist-shaped, the transmission disc 15 is sleeved on the rotating shaft 5 through the first central hole 32, so that the transmission disc 15 and the rotating shaft 5 are in axial sliding and circumferential fixed fit, the driven gear 14 is provided with a second central hole 30, one side of the driven gear 14 abuts against the cover plate 10, a central pit is formed in the other side of the driven gear 14, the arc-shaped grooves 29 are all located in the bottom of the central pit, the driven gear 14 is sleeved on the central shaft 31 through the second central hole 30, the transmission disc 15 is located on one side of the driven gear 14 corresponding to the central pit, the outer diameter of the transmission disc 15 is smaller than the inner diameter of the central pit, and the return spring 16 is located between the transmission disc 15 and the base 1. The base 1 has a chamber 4 for receiving a reduction gear set. Keep away from apron 10 one side of base 1 and have spacing pit 28, the motor 20 one end that the output shaft corresponds offsets with the bottom of the hole of spacing pit 28, and has the second hole of stepping down on the bottom of the hole of spacing pit 28, and the output shaft of motor 20 passes the second hole of stepping down and stretches out in base 1, driving gear 23 is fixed on the section of motor 20 output shaft that is arranged in base 1, and the motor 20 one end of keeping away from the output shaft offsets with enclosing cover 2 to fix motor 20 in the casing.

In order to facilitate the driving of the opening and closing of the valve, a blind hole 17 matched with the valve rod of the valve in shape is formed in the end face of the output end of the rotating shaft 5.

In order to provide status indication, the controller 9 is provided with three status indication lamps 8, the light guide pipes 7 are arranged between the indication lamps and the front surface of the shell, the light guide pipes 7 are integrally connected with the shell, and the thickness of the shell wall of the shell corresponding to the inner cavity of the light guide pipe 7 is smaller than that of the shell walls of other positions of the shell.

The position detection device comprises two micro switches 18, wherein the two micro switches 18 are positioned on one side of a rotating shaft 5, the two micro switches 18 are sequentially arranged side by side along the axial direction of the rotating shaft 5, elastic sheets of the micro switches 18 face the rotating shaft 5, two flanges 19 which are arranged radially outwards are arranged on the rotating shaft 5 corresponding to the micro switches 18, the two flanges 19 corresponding to the same micro switch 18 are positioned at two ends of a radial line of the rotating shaft 5, and the radial lines where the flanges 19 of different micro switches 18 are positioned are mutually vertical; the microswitches 18 are all in electrical signal connection with the controller 9. The advantage of this design is that two micro-switches 18 can be used to achieve two states, half-open and full-open.

Example two

As shown in 1~3, 5~9, the valve actuator of the present invention includes a housing, a rotating shaft 5, a motor 20 and a controller 9 are provided in the housing, the controller 9 is a circuit board, a cable 3 is provided on the controller 9, a wire hole is provided on the housing, and the cable 3 extends out through the wire hole. One end of the rotating shaft 5 is an output end, the output end of the rotating shaft 5 penetrates through the shell to extend out, and the output end of the rotating shaft 5 is in rotating fit with the shell. A transmission mechanism is arranged between an output shaft of the motor 20 and the rotating shaft 5; and a position detection device for detecting the rotation angle of the rotating shaft 5 is arranged in the shell. The motor 20 is electrically connected with the controller 9, and the position detection device is electrically connected with the controller 9.

To facilitate manual operation, the transmission mechanism comprises a driving gear 23, a reduction gear set and a driven gear 14; the driving gear 23 is concentrically fixed on an output shaft of the motor 20, the driven gear 14 is sleeved on the rotating shaft 5, the driven gear 14 and the rotating shaft 5 are axially fixed and circumferentially rotated, and the reduction gear set is located between the driving gear 23 and the driven gear 14. The side face of the driven gear 14 corresponding to the output end of the rotating shaft 5 is uniformly provided with arc-shaped grooves 29 along the circumferential direction, the centers of the arc-shaped grooves 29 are all positioned on the axis of the driven gear 14, the depths of the arc-shaped grooves 29 are gradually reduced from one end to the other end, the depths of the shallow ends of the arc-shaped grooves 29 are zero, and the directions of the deep ends and the shallow ends of the arc-shaped grooves 29 are consistent. The rotating shaft 5 on one side of the driven gear 14 corresponding to the arc-shaped groove 29 is concentrically provided with a transmission disc 15, the transmission disc 15 is matched with the rotating shaft 5 in an axial sliding and circumferential fixing manner, arc-shaped bosses 33 are uniformly distributed on the disc surface of the transmission disc 15 close to the driven gear 14 along the circumferential direction of the transmission disc, the circle centers of the arc-shaped bosses 33 are all arranged on the axis of the rotating shaft 5, the heights of the arc-shaped bosses 33 gradually become lower from one end to the other end of the arc-shaped bosses, and the thicknesses of the short ends of the arc-shaped bosses are zero. A return spring 16 is arranged between one side of the transmission disc 15 far away from the driven gear 14 and the inner wall of the shell, the return spring 16 is sleeved on the rotating shaft 5, and the arc-shaped grooves 29 and the arc-shaped protrusions are arranged in a one-to-one correspondence mode. The side face of the shell corresponding to the end, far away from the output end, of the rotating shaft 5 is provided with a first yielding hole, the end, far away from the output end, of the rotating shaft 5 is located in the first yielding hole, the rotating shaft 5 is matched with the first yielding hole in a rotating sealing mode, and the end face, far away from the output end, of the end face, far away from the end, of the rotating shaft 5 is provided with a manual operation hole 6 matched with a wrench.

The casing divide into base 1 and enclosing cover 2 from its back to openly, and base 1 and enclosing cover 2 are the working of plastics, have annular outer boss 11 on the lateral wall around the 1 oral area of base, the oral area cover of enclosing cover 2 is on 1 oral area of base, and 2 oral area terminal surfaces of enclosing cover offset with annular outer boss 11, adopt hot melt technology closely fixed continuous between the oral area of enclosing cover 2 and annular boss to realize sealing between the two. The output end of the rotating shaft 5 is positioned on the base 1, and the rotating shaft 5 is matched with the base 1 in a rotating sealing manner. The butt joint of base 1 and enclosing cover 2 all has semi-circular hole 27, and two semi-circular hole 27 butt joints become the line hole, be closely matched with between cable 3 and the line hole. The mouth of the base 1 is provided with a middle cover, the middle cover comprises a cover plate 10, one side of the cover plate 10 extends out of an annular enclosing plate 12, the inner side wall of the periphery of the mouth of the base 1 is provided with an annular inner boss 13, one side of the cover plate 10 far away from the annular enclosing plate 12 is abutted to the annular inner boss 13, and one side of the annular enclosing plate 12 far away from the cover plate 10 extends into the outer cover 2. The rotating shaft 5 is perpendicular to the cover plate 10, and two ends of the rotating shaft 5 extend out of two sides of the cover plate 10 respectively. The transmission mechanism is located between the cover plate 10 and the base 1, the transmission disc 15 is provided with a central shaft 31, a waist-shaped first central hole 32 is formed in the central shaft 31, the section of the rotating shaft 5 corresponding to the transmission disc 15 is waist-shaped, the transmission disc 15 is sleeved on the rotating shaft 5 through the first central hole 32, so that the transmission disc 15 and the rotating shaft 5 are in axial sliding and circumferential fixed fit, the driven gear 14 is provided with a second central hole 30, one side of the driven gear 14 abuts against the cover plate 10, a central pit is formed in the other side of the driven gear 14, the arc-shaped grooves 29 are located on the bottom of the central pit, the driven gear 14 is sleeved on the central shaft 31 through the second central hole 30, the transmission disc 15 is located on one side of the driven gear 14 corresponding to the central pit, the outer diameter of the transmission disc 15 is smaller than the inner diameter of the central pit, and the reset spring 16 is located between the transmission disc 15 and the base 1. The base 1 has a chamber 4 for receiving a reduction gear set. Keep away from apron 10 one side of base 1 and have spacing pit 28, the motor 20 one end that the output shaft corresponds offsets with the bottom of the hole of spacing pit 28, and has the second hole of stepping down on the bottom of the hole of spacing pit 28, and the output shaft of motor 20 passes the second hole of stepping down and stretches out in base 1, driving gear 23 is fixed on the section of motor 20 output shaft that is arranged in base 1, and the motor 20 one end of keeping away from the output shaft offsets with enclosing cover 2 to fix motor 20 in the casing.

In order to facilitate the driving of the valve to open and close, a blind hole 17 matched with the valve rod of the valve in shape is formed in the end face of the output end of the rotating shaft 5.

In order to provide status indication, the controller 9 is provided with three status indication lamps 8, the light guide pipes 7 are arranged between the indication lamps and the front surface of the shell, the light guide pipes 7 and the shell are integrally connected, and the thickness of the wall of the shell at the section corresponding to the inner cavity of the light guide pipe 7 is smaller than that of the wall of the shell at other positions of the shell.

The position detection device comprises a grating disc 21 and a photoelectric switch 22, wherein the grating disc 21 is concentrically fixed on the rotating shaft 5, the photoelectric switch 22 is positioned on one side of the rotating shaft 5, and the grating disc 21 penetrates through a detection port of the photoelectric switch 22. The photoelectric switch 22 is in electrical signal connection with the controller 9. The advantage of this design is that the valve can be controlled to open or close arbitrarily by the cooperation of the grating disc 21 and the photoelectric switch 22.

When the valve is used, the cable 3 is connected with a power supply, the controller 9 is connected with an external server, and the output end of the motor 20 is connected with a valve rod of a common mechanical valve. When remote control is needed, the external server sends an instruction to the controller 9, the controller 9 controls the motor 20 to rotate according to the instruction of the external server, and the valve rod of the valve is driven to rotate electrically through the rotating shaft 5, so that remote opening and closing control is realized. The manual operation is required, a worker inserts a wrench into the manual operation hole 6; then, drive pivot 5 and driving disc 15 through the board-like and rotate to the short end of arc boss 33, and the arc boss 33 high-end leaves the deep end of arc recess, and driving disc 15 is to keeping away from driven gear 14 one side activity under the effect of arc recess, and reset spring 16 is compressed, continues to rotate pivot 5, and the arc is protruding leaves the arc recess completely, realizes the separation and reunion, accomplishes manual operation simultaneously.

Claims

1. A valve actuator is characterized by comprising a shell, wherein a rotating shaft (5), a motor (20) and a controller (9) are arranged in the shell, the controller (9) is provided with a cable (3), the shell is provided with a wire hole, and the cable (3) penetrates through the wire hole to extend out; one end of the rotating shaft (5) is an output end, the output end of the rotating shaft (5) penetrates through the shell to extend out, and the output end of the rotating shaft (5) is in rotating fit with the shell; a transmission mechanism is arranged between an output shaft of the motor (20) and the rotating shaft (5); a position detection device for detecting the rotation angle of the rotating shaft (5) is arranged in the shell; the motor (20) is electrically connected with the controller (9), and the position detection device is in electric signal connection with the controller (9).

2. The valve actuator of claim 1, wherein the transmission mechanism includes a drive gear (23), a reduction gear set, and a driven gear (14); the driving gear (23) is concentrically fixed on an output shaft of the motor (20), the driven gear (14) is sleeved on the rotating shaft (5), the driven gear (14) and the rotating shaft (5) are axially fixed and circumferentially rotationally matched, and the reduction gear set is positioned between the driving gear (23) and the driven gear (14); arc-shaped grooves (29) are uniformly distributed on the side surface of the driven gear (14) corresponding to the output end of the rotating shaft (5) along the circumferential direction of the driven gear, the circle centers of the arc-shaped grooves (29) are all positioned on the axis of the driven gear (14), the depths of the arc-shaped grooves (29) are gradually reduced from one end to the other end of the arc-shaped grooves, the depths of the shallow ends of the arc-shaped grooves (29) are zero, and the directions of the deep ends and the shallow ends of the arc-shaped grooves (29) are consistent; a transmission disc (15) is concentrically arranged on the rotating shaft (5) at one side of the driven gear (14) corresponding to the arc-shaped groove (29), the transmission disc (15) is matched with the rotating shaft (5) in an axial sliding and circumferential fixing manner, arc-shaped bosses (33) are uniformly distributed on the disc surface of the transmission disc (15) close to the driven gear (14) along the circumferential direction of the transmission disc, the circle centers of the arc-shaped bosses (33) are all on the axis of the rotating shaft (5), the heights of the arc-shaped bosses (33) gradually become lower from one end to the other end of the arc-shaped bosses, and the thicknesses of the short ends of the arc-shaped bosses are zero; a reset spring (16) is arranged between one side of the transmission disc (15) far away from the driven gear (14) and the inner wall of the shell, the reset spring (16) is sleeved on the rotating shaft (5), and the arc-shaped grooves (29) and the arc-shaped protrusions are arranged in a one-to-one correspondence mode.

3. The valve actuator according to claim 2, wherein the housing side surface corresponding to the end of the rotating shaft (5) far from the output end is provided with a first relief hole, the end of the rotating shaft (5) is located in the first relief hole, the rotating shaft (5) and the first relief hole are in rotating sealing fit, and the end surface of the end of the rotating shaft (5) far from the output end is provided with a manual operation hole (6) matched with a wrench.

4. The valve actuator according to claim 2, characterized in that the reduction gear set comprises a primary reduction gear (24), a secondary reduction gear (25) and a final reduction gear (26), the primary reduction gear (24), the secondary reduction gear (25) and the final reduction gear (26) each comprising a gearwheel and a pinion fixed coaxially; the number of the secondary reduction gears (25) is not less than three, the large gear of the primary reduction gear (24) is meshed with the driving gear (23), the small gear of the primary reduction gear (24) is meshed with the large gear of the primary secondary reduction gear (25), in the secondary reduction gear (25), the small gear is meshed with the large gear step by step from the first stage to the last stage, and the small gear of the last secondary reduction gear (25) is meshed with the driven gear (14); the secondary reduction gears (25) are coaxially arranged at intervals.

5. The valve actuator according to claim 2, wherein the housing is divided into a base (1) and an outer cover (2) from the back to the front, an annular outer boss (11) is arranged on the outer side wall around the opening of the base (1), the opening of the outer cover (2) covers the opening of the base (1), and the end surface of the opening of the outer cover (2) is abutted against the annular outer boss (11); the output end of the rotating shaft (5) is positioned on the base (1), and the rotating shaft (5) is matched with the base (1) in a rotating and sealing manner; the butt joint of the base (1) and the outer cover (2) is provided with semicircular holes (27), the two semicircular holes (27) are butted to form the wire holes, and the cable (3) is tightly matched with the wire holes; the middle cover is arranged at the opening part of the base (1) and comprises a cover plate (10), an annular enclosing plate (12) extending out of one side of the cover plate (10) is arranged on the periphery of the cover plate (10), an annular inner boss (13) is arranged on the inner side wall of the periphery of the opening part of the base (1), one side of the cover plate (10) far away from the annular enclosing plate (12) is abutted against the annular inner boss (13), and one side of the annular enclosing plate (12) far away from the cover plate (10) extends into the outer cover (2); the rotating shaft (5) is vertical to the cover plate (10), and two ends of the rotating shaft (5) respectively extend out of two sides of the cover plate (10); the transmission mechanism is positioned between the cover plate (10) and the base (1), the transmission disc (15) is provided with a central shaft (31), a waist-shaped first central hole (32) is formed in the central shaft (31), the section of the rotating shaft (5) corresponding to the transmission disc (15) is waist-shaped, the transmission disc (15) is sleeved on the rotating shaft (5) through the first central hole (32), so that the transmission disc (15) and the rotating shaft (5) are in axial sliding and circumferential fixed fit, the driven gear (14) is provided with a second central hole (30), one side of the driven gear (14) is abutted against the cover plate (10), the other side of the driven gear (14) is provided with a central pit, the arc-shaped grooves (29) are both positioned on the bottom of the central pit, the driven gear (14) is sleeved on the central shaft (31) through the second central hole (30), the transmission disc (15) is positioned on one side of the driven gear (14) corresponding to the central pit, the outer diameter of the central pit (15) is smaller than the inner diameter of the central pit, and the reset spring (16) is positioned between the transmission disc (15) and the base (1); a chamber (4) for accommodating a reduction gear set is arranged on the base (1); keep away from apron (10) one side of base (1) and have spacing pit (28), motor (20) one end that the output shaft corresponds offsets with the bottom of the hole of spacing pit (28), and have the second hole of stepping down on the bottom of the hole of spacing pit (28), the output shaft of motor (20) passes the second hole of stepping down and stretches out in base (1), driving gear (23) are fixed on that section motor (20) output shaft that is arranged in base (1), and motor (20) one end of keeping away from the output shaft offsets with enclosing cover (2) to fix motor (20) in the casing.

6. Valve actuator according to claim 1, wherein the end face of the output end of the shaft (5) has a blind hole (17) adapted to the shape of the valve stem of the valve.

7. The valve actuator according to claim 1, wherein the controller (9) comprises three status indicators (8), a light pipe (7) is arranged between each status indicator and the front surface of the housing, the light pipe (7) is integrally connected with the housing, and the wall thickness of the portion of the housing corresponding to the inner cavity of the light pipe (7) is smaller than the wall thickness of the other portions of the housing.

8. The valve actuator according to 1~7 as claimed in any of claims 5363, wherein the position detecting device comprises two micro switches (18), the two micro switches (18) are located at one side of the rotating shaft (5), the two micro switches (18) are sequentially arranged side by side along the axial direction of the rotating shaft (5), the elastic pieces of the micro switches (18) face the rotating shaft (5), the rotating shaft (5) corresponding to the micro switches (18) is provided with two flanges (19) arranged radially outwards, the two flanges (19) corresponding to the same micro switch (18) are located at two ends of a radial line of the rotating shaft (5), and the radial lines where the flanges (19) of different micro switches (18) are located are perpendicular to each other; the micro switches (18) are all in electric signal connection with the controller (9).

9. The valve actuator of claim 1~7 wherein said position detecting means comprises a grating disk (21) and a photoelectric switch (22), said grating disk (21) is concentrically fixed on said shaft (5), said photoelectric switch (22) is located on one side of said shaft (5), and said grating disk (21) passes through the detecting port of said photoelectric switch (22); the photoelectric switch (22) is in electric signal connection with the controller (9).