CN218992530U

CN218992530U - Compact pneumatic actuator

Info

Publication number: CN218992530U
Application number: CN202222974456.0U
Authority: CN
Inventors: 贾金光; 余忠燕; 唐大建; 刘伟; 蔡文聪; 沈梦贤; 杜昆明; 袁家星; 余乐棉
Original assignee: ZHEJIANG LIANDA VALVE CO Ltd
Current assignee: ZHEJIANG LIANDA VALVE CO Ltd
Priority date: 2022-11-07
Filing date: 2022-11-07
Publication date: 2023-05-09
Anticipated expiration: 2032-11-07

Abstract

The utility model relates to a compact pneumatic actuator which comprises a cylinder body, a piston, a guide rail pipe, a screw rod and a manual adjusting mechanism, wherein the piston is movably connected in the cylinder body, air holes a and air holes b are formed in the two sides of the piston, the cylinder body is rotatably connected with the guide rail pipe through the piston, the piston is fixedly connected with the screw rod, one end of the guide rail pipe is slidably connected with the screw rod, and the screw rod is connected with the manual adjusting mechanism. The utility model aims to meet the requirements of switching between manual and pneumatic control modes by rotating the clutch handle in the manual adjusting mechanism and the rotation of the guide rail pipe by the hand wheel, and has the advantages of compact integral structure, small required space and wide application environment range due to small occupied space when the hand wheel and the clutch handle are operated.

Description

Compact pneumatic actuator

Technical Field

The utility model relates to the technical field of valves, in particular to a compact pneumatic actuator.

Background

The pneumatic actuator of the angular travel valve needs a manual adjusting mechanism which can be manually controlled so as to be used for coping with sudden situations such as out-of-control, paralysis and the like of the pneumatic system, and the manual adjusting mechanism of the angular travel valve is mainly controlled by a shifting fork structure or a gear rack structure at present, so that the required transverse operation space of the pneumatic actuator is larger, and the conventional pneumatic actuator obviously cannot meet the requirements under the working condition of coping with the narrow installation space, thus the pneumatic actuator with compact structure is needed.

Disclosure of Invention

In order to overcome the defects of the background technology, the utility model aims to meet the requirements of switching between manual and pneumatic control modes of a valve by rotating the clutch handle in the manual adjusting mechanism and the rotation function of a manual control guide rail pipe by the hand wheel.

The technical scheme adopted by the utility model is as follows: the compact pneumatic actuator comprises a cylinder body, a piston, a guide rail pipe, a screw rod and a manual adjusting mechanism, wherein the piston is movably connected in the cylinder body, air holes a and air holes b are formed in the two sides of the piston, the cylinder body is rotatably connected with the guide rail pipe through the piston, the piston is fixedly connected with the screw rod, one end of the guide rail pipe is slidably connected with the screw rod, and the screw rod is connected with the manual adjusting mechanism; the manual adjusting mechanism comprises a box body, a supporting plate, a hand wheel, a clutch plate, a clutch nut and a clutch handle, wherein the box body is fixedly connected with the box body, the supporting plate is rotationally connected with the box body, the hand wheel is connected to one side of the supporting plate in a meshed mode, the clutch plate is rotationally connected to the supporting plate, the clutch nut matched with the screw rod is clamped between the clutch plate and the supporting plate, and the clutch handle for controlling the clutch nut is arranged on one side of the clutch plate.

The working principle of the technical scheme is adopted: one end of the guide rail pipe is provided with a square hole for controlling the valve to be opened or closed, and the clutch nut is controlled to be separated or folded relative to the screw rod by the rotary clutch handle, so that the pneumatic actuator is switched between pneumatic and manual control states;

pneumatic control state: when the clutch nut is separated, the screw rod is not controlled by the hand wheel, at the moment, the pneumatic actuator is in a pneumatic control state, the air hole a and the air hole b are externally connected with the air pump and drive the piston to move up and down, and the transmission pin on the piston drives the guide rail pipe to rotate through the guide groove so as to meet the control of air pressure on the valve.

Manual control state: when the clutch nut is folded, the clutch nut is meshed with the screw rod, at the moment, the pneumatic actuator is in a manual control state, the clutch nut is driven to rotate by rotating the hand wheel, the clutch nut drives the piston to move up and down through the screw rod, and the transmission pin on the piston drives the guide rail pipe to rotate through the guide groove so as to meet the manual control of the valve.

The clutch plate is further provided with a guide groove, the clutch nut is provided with a cylindrical pin corresponding to the guide groove, and the clutch plate controls the clutch nut to be separated or folded through the cylindrical pin.

By adopting the technical scheme, the clutch nuts are controlled to be separated or folded through the two arc-shaped guide grooves to switch the pneumatic and manual control states, and the pneumatic and manual control device is simple and quick in mode and simple and stable in structure.

The utility model is further arranged that the bottom of the supporting disc is provided with the bevel gear, the hand wheel is connected with the supporting disc through the bevel gear in a meshed manner, and the box body is provided with the grease injection valve above the bevel gear.

Further, the box body is detachably connected with a box cover, a bearing is arranged between the box body and the box cover, and the hand wheel is rotatably connected to the box body through the bearing.

By adopting the technical scheme, the lubricant is injected through the grease injection valve, so that the transmission efficiency of the bevel gear, the hand wheel and the bearing is high and the service life is long.

The utility model is further arranged that the clutch disc is clamped with the rain cover, the rain cover is provided with a transparent visual window, and the visual window is provided with scales.

Further, the piston is provided with a transmission pin, the transmission pin is fixedly connected with a screw rod, the guide rail pipe is provided with a double guide rail groove matched with the transmission pin, and the transmission pin is clamped in the double guide rail groove.

By adopting the technical scheme, the screw rod can be visually seen on which scale through the visual window, so that the rotating angle of the guide rail pipe is judged, and the opening state of the valve is judged.

The cylinder body comprises an upper cylinder sleeve, a lower cylinder sleeve, a pull rod and a cylinder barrel, wherein the upper cylinder sleeve is fixedly connected with the lower cylinder sleeve through the pull rod, the cylinder barrel is clamped between the upper cylinder sleeve and the lower cylinder sleeve, and the piston is connected with the pull rod in a sliding manner.

Further, a spring is arranged between the piston and the upper cylinder sleeve/the lower cylinder sleeve, and the spring is sleeved on the pull rod.

Further, one side of the upper cylinder sleeve and one side of the lower cylinder sleeve are respectively provided with an air hole a and an air hole b, and the air holes a and the air holes b are led into the cylinder barrel.

By adopting the technical scheme, when the air pump stops supplying air, the piston is abutted with the upper cylinder sleeve/the lower cylinder sleeve through the action of the spring, so that the valve is driven to be automatically closed, safety is ensured, and meanwhile, the spring can be arranged at the upper side or the lower side of the piston according to the required rotation direction of the guide rail pipe, so that the requirement of automatic emergency closing of the valve under the condition without air pressure is met.

Embodiments of the present utility model are further described below with reference to the accompanying drawings.

Drawings

FIG. 1 is a front view of the present utility model;

FIG. 2 is a cross-sectional view of a first embodiment of the present utility model;

FIG. 3 is a schematic view of a clutch plate according to the present utility model;

FIG. 4 is a schematic view of a clutch nut according to the present utility model;

FIG. 5 is a schematic view of a rail pipe according to the present utility model;

FIG. 6 is a cross-sectional view of a second embodiment of the present utility model;

wherein: 1-cylinder, 2-piston, 3-guide rail pipe, 4-screw rod, 5-manual adjusting mechanism, 6-grease injection valve, 7-rain cover, 11-air hole a, 12-air hole b, 13-upper cylinder sleeve, 14-lower cylinder sleeve, 15-pull rod, 16-cylinder barrel, 17-spring, 21-driving pin, 31-double guide rail groove, 51-box, 52-supporting disc, 53-hand wheel, 54-clutch disc, 55-clutch nut, 56-clutch handle, 57-cylindrical pin, 58-bevel gear, 59-case cover, 60-bearing, 71-visual window, 72-scale, 541-guide groove;

Detailed Description

As shown in fig. 1-5, the compact pneumatic actuator comprises a cylinder body 1, a piston 2, a guide rail pipe 3, a screw rod 4 and a manual adjusting mechanism 5, wherein the piston 2 is movably connected in the cylinder body 1, air holes a11 and air holes b12 are formed in the two sides of the cylinder body 1, the cylinder body 1 is rotatably connected with the guide rail pipe 3 through the piston 2, the piston 2 is fixedly connected with the screw rod 4, one end of the guide rail pipe 3 is slidably connected with the screw rod 4, and the screw rod 4 is connected with the manual adjusting mechanism 5;

the manual adjustment mechanism 5 comprises a box body 51, a supporting disc 52, a hand wheel 53, a clutch disc 54, a clutch nut 55 and a clutch handle 56, wherein the box body 51 is fixedly connected with the box body 1, the supporting disc 52 is rotatably connected with the box body 51, one side of the supporting disc 52 is connected with the hand wheel 53 in a meshed manner, the supporting disc 52 is rotatably connected with the clutch disc 54, the clutch nut 55 matched with the screw rod 4 is clamped between the clutch disc 54 and the supporting disc 52, and the clutch handle 56 for controlling the clutch nut 55 is arranged on one side of the clutch disc 54.

As shown in fig. 3-5, in this embodiment, the clutch plate 54 is provided with a guiding groove 541, the clutch nut 55 is provided with a cylindrical pin 57 corresponding to the guiding groove 541, and the clutch plate 54 controls the clutch nut 55 to be separated or folded through the cylindrical pin 57. The clutch nut 55 is controlled to be separated or folded through the two arc-shaped guide grooves 541 to switch the pneumatic or manual control state, and the structure is simple and stable.

In this embodiment, a bevel gear 58 is disposed at the bottom of the supporting disc 52, the hand wheel 53 is engaged with and connected to the supporting disc 52 through the bevel gear 58, and the tank 51 is disposed above the bevel gear 58 and is provided with a grease injection valve 6. The box body 51 is detachably connected with a box cover 59, a bearing 60 is arranged between the box body 51 and the box cover 59, and the hand wheel 53 is rotatably connected with the box body 51 through the bearing 60. Lubricant is injected through the grease injection valve 6, so that the bevel gear 58, the hand wheel 53 and the bearing 60 have high transmission efficiency and long service life.

In this embodiment, the clutch plate 54 is clamped with a rain cover 7, the rain cover 7 is provided with a transparent visual window 71, and the visual window 71 is provided with scales 72. The piston 2 is provided with a transmission pin 21, the transmission pin 21 is fixedly connected with a screw rod 4, the guide rail pipe 3 is provided with a double guide rail groove 31 matched with the transmission pin 21, and the transmission pin 21 is clamped in the double guide rail groove 31. The visual window 71 can visually see which scale 72 the screw 4 is positioned on, so that the rotating angle of the guide rail pipe 3 is judged to judge the opening state of the valve.

In this embodiment, the cylinder body 1 includes an upper cylinder liner 13, a lower cylinder liner 14, a pull rod 15 and a cylinder barrel 16, the upper cylinder liner 13 is fixedly connected with the lower cylinder liner 14 through the pull rod 15, the cylinder barrel 16 is clamped between the upper cylinder liner 13 and the lower cylinder liner 14, and the piston 2 is slidably connected with the pull rod 15. And one side of the upper cylinder sleeve 13 and one side of the lower cylinder sleeve 14 are respectively provided with an air hole a11 and an air hole b12, and the air holes a11 and the air holes b12 are led into the cylinder 16.

As shown in fig. 2, the present utility model provides a first embodiment based on the above technical solution, a spring 17 is disposed between the piston 2 and the lower cylinder liner 14, and the spring 17 is sleeved on the pull rod 15. When the air pump stops supplying air, the piston 2 is abutted with the lower cylinder sleeve 14 under the action of the spring 17, so that the valve is driven to be automatically closed, and the safety is ensured.

As shown in fig. 6, the present utility model also provides a second embodiment, which differs from the first embodiment in that: a spring 17 is arranged between the piston 2 and the upper cylinder sleeve 13, and the spring 17 is sleeved on the pull rod 15. When the air pump stops supplying air, the piston 2 is abutted against the upper cylinder sleeve 13 through the action of the spring 17, so that the valve is driven to be automatically closed, and the safety is ensured.

In addition to the embodiments described above, other embodiments of the utility model are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the utility model.

Claims

1. The utility model provides a compact pneumatic actuator, its characterized in that includes cylinder body (1), piston (2), guide rail pipe (3), lead screw (4) and manual adjustment mechanism (5), swing joint has piston (2) in cylinder body (1), and cylinder body (1) are located the both sides of piston (2) and are equipped with gas pocket a (11) and gas pocket b (12), cylinder body (1) is through piston (2) swivelling joint has guide rail pipe (3), piston (2) fixedly connected with lead screw (4), one end sliding connection of guide rail pipe (3) has lead screw (4), lead screw (4) are connected with manual adjustment mechanism (5);

manual adjustment mechanism (5) include box (51), supporting disk (52), hand wheel (53), clutch disc (54), clutch nut (55) and clutch handle (56), cylinder body (1) fixedly connected with box (51), box (51) swivelling joint has supporting disk (52), one side meshing of supporting disk (52) is connected with hand wheel (53), and swivelling joint has clutch disc (54) on supporting disk (52), joint has clutch nut (55) with lead screw (4) assorted between clutch disc (54) and supporting disk (52), one side of clutch disc (54) is equipped with clutch handle (56) of control clutch nut (55), clutch disc (54) are equipped with guiding groove (541), clutch nut (55) are equipped with cylindric lock (57) corresponding with guiding groove (541), clutch disc (54) are separated or are drawn in through cylindric lock (57) control clutch nut (55).

2. A compact pneumatic actuator as defined in claim 1, wherein: the bottom of the supporting disc (52) is provided with a bevel gear (58), the hand wheel (53) is connected to the supporting disc (52) through the bevel gear (58) in a meshed mode, and the box body (51) is arranged above the bevel gear (58) and is provided with a grease injection valve (6).

3. A compact pneumatic actuator as defined in claim 2, wherein: the box body (51) is detachably connected with a box cover (59), a bearing (60) is arranged between the box body (51) and the box cover (59), and the hand wheel (53) is rotatably connected to the box body (51) through the bearing (60).

4. A compact pneumatic actuator as set forth in claim 3 wherein: the clutch disc (54) is connected with a rain cover (7) in a clamping mode, the rain cover (7) is provided with a transparent visual window (71), and scales (72) are arranged on the visual window (71).

5. A compact pneumatic actuator as defined in claim 4, wherein: the piston (2) is provided with a transmission pin (21), the transmission pin (21) is fixedly connected with a screw rod (4), the guide rail pipe (3) is provided with a double guide rail groove (31) matched with the transmission pin (21), and the transmission pin (21) is clamped in the double guide rail groove (31).

6. A compact pneumatic actuator as defined in claim 1, wherein: the cylinder body (1) comprises an upper cylinder sleeve (13), a lower cylinder sleeve (14), a pull rod (15) and a cylinder barrel (16), wherein the upper cylinder sleeve (13) is fixedly connected with the lower cylinder sleeve (14) through the pull rod (15), the cylinder barrel (16) is clamped between the upper cylinder sleeve (13) and the lower cylinder sleeve (14), and the piston (2) is connected with the pull rod (15) in a sliding mode.

7. A compact pneumatic actuator as defined in claim 6, wherein: a spring (17) is arranged between the piston (2) and the upper cylinder sleeve (13)/lower cylinder sleeve (14), and the spring (17) is sleeved on the pull rod (15).

8. A compact pneumatic actuator as defined in claim 7, wherein: one side of the upper cylinder sleeve (13) and one side of the lower cylinder sleeve (14) are respectively provided with an air hole a (11) and an air hole b (12), and the air holes a (11) and the air holes b (12) are led into the cylinder barrel (16).