CN108071845B - Straight-stroke pneumatic actuator - Google Patents
Straight-stroke pneumatic actuator Download PDFInfo
- Publication number
- CN108071845B CN108071845B CN201810090622.6A CN201810090622A CN108071845B CN 108071845 B CN108071845 B CN 108071845B CN 201810090622 A CN201810090622 A CN 201810090622A CN 108071845 B CN108071845 B CN 108071845B
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- spring
- piston
- screw
- pneumatic actuator
- sleeve
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- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
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
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/14—Actuating devices; Operating means; Releasing devices actuated by fluid for mounting on, or in combination with, hand-actuated valves
- F16K31/143—Actuating devices; Operating means; Releasing devices actuated by fluid for mounting on, or in combination with, hand-actuated valves the fluid acting on a piston
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Actuator (AREA)
Abstract
The invention discloses a straight-travel pneumatic actuator, which comprises a straight-travel pneumatic actuator and a normally open straight-travel pneumatic actuator, wherein the straight-travel pneumatic actuator comprises a rotary hand wheel, a screw rod, a limit screw sleeve, a piston and a piston rod; the normally open type straight-stroke pneumatic actuator comprises a rotary hand wheel, a screw rod, a limit screw sleeve, a spring, a piston and a piston rod. The invention has the advantages of small volume, simple structure, convenient production, manual operation execution, single-action straight-stroke pneumatic actuator and suitability for complex environments.
Description
Technical Field
The invention relates to a pneumatic actuator, in particular to a straight-travel pneumatic actuator.
Background
The existing pneumatic actuator generally adopts a double-acting pneumatic actuator, but when the pneumatic actuator loses the air source, the pneumatic actuator can only be kept in situ and cannot be automatically reset, so that the requirement of dangerous working conditions cannot be met. Therefore, single-acting pneumatic actuators remain of great use. Compared with a double-acting pneumatic actuator, the single-acting pneumatic actuator has small air consumption and larger volume. The manual operating mechanism of the general straight-stroke pneumatic actuator needs to be provided with a clutch structure, and the clutch structure is relatively complex, high in manufacturing cost and large in size.
When the valve needs to be manually operated under the specific working condition, the single-action straight-stroke pneumatic actuator needs to wear a manual operating mechanism. When the common single-action straight-travel pneumatic actuator is combined with the manual operation mechanism, the defects of large actuator volume, difficult processing, inconvenient operation and the like exist.
Disclosure of Invention
The invention provides the single-action straight-travel pneumatic actuator which has smaller volume, simple structure and can realize manual operation.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a straight travel pneumatic actuator, which comprises a shell, wherein a rotary hand wheel is arranged above the shell, a screw rod is arranged at the lower end of the rotary hand wheel, and the screw rod is arranged in the shell in a penetrating way; the lower part of the screw rod is sleeved with a sleeve, the lower end of the sleeve is fixedly connected with the piston, the edge of the piston is connected with the side wall of the shell, a through hole is formed in the central position of the piston, a piston rod penetrates through the through hole, the lower end of the screw rod is connected with a sleeve spring, and the lower end of the sleeve spring is fixedly connected with the piston rod; a cylinder spring is arranged in the shell, the upper end of the cylinder spring is fixedly connected with a spring cylinder end cover, and the lower end of the cylinder spring is connected with the upper surface of the piston.
In the above technical scheme, preferably, the screw is sleeved with a limit screw sleeve, and the limit screw sleeve is fixedly connected with the inner side wall of the upper part of the shell.
In the above technical scheme, preferably, the shell is cylindrical, the shell comprises a spring cylinder end cover, the upper end of the spring cylinder end cover is provided with a rain-proof cap, and the upper surface of the rain-proof cap is sleeved with the screw rod.
In the above technical scheme, preferably, the limit screw sleeve is fixedly connected with the inner side surfaces of the spring cylinder end cover and the rain hat.
In the above technical scheme, preferably, the edge of the spring cylinder end cover is connected with a spring cylinder, the outer surface of the lower end of the spring cylinder is sleeved with an upper end cover, the lower part of the outer side of the upper end cover is sleeved with a piston cylinder, and the inner side of the lower end of the piston cylinder is sleeved with a lower end cover.
In the above technical scheme, preferably, a plurality of support rods are uniformly arranged on the lower surface of the lower end cover along the circumferential direction.
In the above technical scheme, preferably, a screw cap is arranged at the lower end of the screw, and the lower surface of the screw cap is connected with the upper end of the sleeve spring; the screw is sleeved with a thrust bearing at the upper part of the screw cap.
In the above technical scheme, preferably, a thrust bearing is sleeved at the position of the screw on the upper part of the screw cap.
In the above technical scheme, preferably, the upper part of the piston rod is a connecting rod, the diameter of the middle part of the piston rod is larger than that of the connecting rod, the connecting part of the connecting rod and the piston rod is a supporting edge, the connecting rod is sleeved with the through hole, and the supporting edge is abutted with the lower surface of the piston; the upper end of the connecting rod is fixedly connected with the lower part of the sleeve.
In the above technical scheme, preferably, the cylinder spring comprises an outer layer spring and an inner layer spring, and the axle center of the outer layer spring is the same as that of the inner layer spring.
The straight travel pneumatic actuator provided by the invention has the main beneficial effects that:
compared with the prior structure, the volume of the actuator can be reduced by arranging the sleeve in the shell; the screw is driven to rotate by rotating the hand wheel, the up-and-down movement is realized under the reaction of the limit screw sleeve, meanwhile, the screw drives the sleeve to move, and the sleeve drives the piston and the piston rod to move upwards through the sleeve spring, so that the manual operation of the pneumatic actuator can be realized; the piston is pushed back to the lower part of the shell through the action of the cylinder barrel spring, so that the automatic reset closing function is realized.
The sleeve spring is arranged in the sleeve to support the screw, so that the manual function can be automatically recovered by reversely rotating the hand wheel after the screw is tripped; and then can solve among the current structure because there is not the support of spring, when manual operation executor, if appear operating inappropriately, rotate the hand wheel and cause the screw rod to break away from the spacing swivel nut, make pneumatic executor manual operating mechanism inefficacy to when automatic work, the executor appears unable problem of opening completely. Therefore, the trouble caused by manual misoperation can be thoroughly solved.
Drawings
Fig. 1 is a schematic structural view of a straight travel pneumatic actuator.
Fig. 2 is a schematic illustration of the housing of the linear travel pneumatic actuator.
The anti-theft device comprises a rotary hand wheel (11), a connecting rotating shaft (2), a screw rod (21), a limit flat key (22), a screw rod cap (23), a limit screw sleeve (3), a shell (31), a rain cap (32), a spring cylinder end cover (33), a spring cylinder barrel (34), an upper end cover (35), a piston cylinder barrel (36), a lower end cover (4), a sleeve (41), a cylinder cover (42), a thrust bearing (5), a piston (51), a spring positioning groove (52), a through hole (6), a piston rod (61), a connecting rod (62), a dustproof pressing plate (7), a supporting rod (8), a spring (81), a cylinder spring (811), an outer layer spring (812), an inner layer spring (82) and a sleeve spring.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, a schematic structure of the linear-motion pneumatic actuator is shown.
The invention provides a straight travel pneumatic actuator, which comprises a shell 3, wherein the shell 3 is cylindrical, the shell 3 comprises a rain hat 31 arranged at the upper end of the shell, a spring cylinder end cover 32 is arranged at the lower end of the rain hat 31, the edge of the spring cylinder end cover 32 is connected with a spring cylinder 33, the outer surface of the lower end of the spring cylinder 33 is sheathed with an upper end cover 34, the lower part of the outer side of the upper end cover 34 is sheathed with a piston cylinder 35, the inner side of the lower end of the piston cylinder 35 is sheathed with a lower end cover 36, and support rods 7 are uniformly arranged on the lower end cover 36; a plurality of support rods 7 are uniformly arranged on the lower surface of the lower end cover 36 along the circumferential direction, as shown in fig. 2, and are fixedly connected with other mechanisms through the support rods 7.
The shell 3 top is provided with rotatory hand wheel 1, and rotatory hand wheel 1 lower extreme is provided with connection pivot 11, and connection pivot 11 passes through the upper end fixed connection of screw and screw rod 2, and the upper end of screw rod 2 is the circular structure that lacks, guarantees the relative position of screw rod 2 and rotatory hand wheel 1 through spacing flat key 21 and rotatory hand wheel 1 cooperation on the side of screw rod 2.
The screw rod 2 is sleeved with a limit screw sleeve 23, the limit screw sleeve 23 is fixedly connected with the rain hat 31 and the inner side wall of the spring cylinder end cover 32, the lower part of the screw rod 2 is sleeved with a sleeve 4, the lower end of the sleeve 4 is fixedly connected with the piston 5, the screw rod 2 moves relatively along the limit screw sleeve 23, and the sleeve 4 and the piston 5 are driven to move under the reaction force.
The upper end of the sleeve 4 is sleeved with a sleeve cover 41, a sleeve spring 82 is arranged in the sleeve 4, the lower end of the screw 2 is provided with a screw cap 22, and the lower surface of the screw cap 22 is connected with the upper end of the sleeve spring 82; the thrust bearing 42 is sleeved on the screw 2 at the upper part of the screw cap 22; when the screw rod 2 moves, the cylinder cover 41 is pushed to move through the thrust bearing 42, and the sleeve 4 is driven to move.
By arranging the sleeve spring 82, the screw rod 2 is supported by the spring, when pneumatic operation is performed, if the situation that the rotary hand wheel 1 is improperly operated to enable the screw rod 2 to pull the sleeve 4 to enable the pneumatic actuator to be closed in place is caused, the screw rod 2 can be screwed downwards to be separated from the limit screw sleeve 23, and the screw rod 2 is supported by the sleeve spring 82, so that the screw rod 2 is in a limited movable range, and therefore the rotary hand wheel 30 cannot collide with the actuator housing 3; through this structure, can solve the problem that the improper operation of rotatory hand wheel 1 can harm the executor performance, protect the executor structure again, avoid bumping with rotatory hand wheel 1.
The edge of the piston 5 is connected with the side wall of the piston cylinder 35, a through hole 52 is formed at the central position of the piston 5, a piston rod 2 is arranged in the through hole 52 in a penetrating manner, and the lower end of the sleeve spring 82 is fixedly connected with the piston rod 2.
The upper part of the piston rod 2 is provided with a connecting rod 61, the diameter of the middle part of the piston rod 2 is larger than that of the connecting rod 61, the connecting part of the connecting rod 61 and the piston rod 2 is provided with a supporting edge 63, the connecting rod 61 is sleeved with the through hole 52, and the supporting edge 63 is abutted with the lower surface of the piston 5; the upper end of the connecting rod 61 is fixedly connected with the lower part of the sleeve 4 through a screw, and the piston rod 2 is driven to perform an up-and-down movement operation under the movement of the piston 5 through the cooperation of the screw and the supporting edge 63.
A cylinder spring 81 is arranged in the shell 3, the upper end of the cylinder spring 81 is fixedly connected with the spring cylinder end cover 32, and the lower end of the cylinder spring 81 is connected with the upper surface of the piston 5; by providing the cylinder spring 81, after the actuator performs the opening operation, the piston 5 is pushed back to the lower portion in the housing 3, realizing the automatic reset closing function.
The above description of the embodiments of the present invention has been provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and that all the inventions using the inventive concept are to be protected as long as various changes are within the spirit and scope of the present invention as defined and defined by the appended claims to those skilled in the art.
Claims (8)
1. The straight-travel pneumatic actuator is characterized by comprising a shell (3), wherein a rotary hand wheel (1) is arranged above the shell (3), a screw rod (2) is arranged at the lower end of the rotary hand wheel (1), and the screw rod (2) is arranged in the shell (3) in a penetrating manner;
the lower part of the screw rod (2) is sleeved with a sleeve (4), the lower end of the sleeve (4) is fixedly connected with a piston (5), the edge of the piston (5) is connected with the side wall of the shell (3), a through hole (52) is formed in the central position of the piston (5), a piston rod (6) is arranged in the through hole (52) in a penetrating manner, the lower end of the screw rod (2) is connected with a sleeve spring (82), and the lower end of the sleeve spring (82) is fixedly connected with the piston rod (6);
a cylinder spring (81) is arranged in the shell (3), the upper end of the cylinder spring (81) is fixedly connected with a spring cylinder end cover (32), and the lower end of the cylinder spring (81) is connected with the upper surface of the piston (5); the lower end of the screw (2) is provided with a screw cap (22), and the lower surface of the screw cap (22) is connected with the upper end of the sleeve spring (82); the screw (2) is sleeved with a limit screw sleeve (23), and the limit screw sleeve (23) is fixedly connected with the inner side wall of the upper part of the shell (3).
2. The straight-travel pneumatic actuator according to claim 1, wherein the housing (3) is cylindrical, the housing (3) comprises a spring cylinder end cover (32), a rain cap (31) is arranged at the upper end of the spring cylinder end cover (32), and the upper surface of the rain cap (31) is sleeved with the screw (2).
3. The straight travel pneumatic actuator according to claim 2, characterized in that the limit screw sleeve (23) is fixedly connected with the inner side surfaces of the spring cylinder end cover (32) and the rain hat (31).
4. The straight-travel pneumatic actuator according to claim 2, wherein the edge of the spring cylinder end cover (32) is connected with a spring cylinder barrel (33), the outer surface of the lower end of the spring cylinder barrel (33) is sleeved with an upper end cover (34), the lower part of the outer side of the upper end cover (34) is sleeved with a piston cylinder barrel (35), and the inner side of the lower end of the piston cylinder barrel (35) is sleeved with a lower end cover (36).
5. The linear-motion pneumatic actuator according to claim 4, wherein a plurality of support rods (7) are uniformly provided on the lower surface of the lower end cap (36) in the circumferential direction.
6. The linear motion pneumatic actuator of claim 5, wherein the screw (2) is provided with a thrust bearing (42) at a position above the screw cap (22).
7. The straight-travel pneumatic actuator according to claim 1, wherein the upper part of the piston rod (6) is a connecting rod (61), the diameter of the middle part of the piston rod (6) is larger than that of the connecting rod (61), the connecting part of the connecting rod (61) and the piston rod (6) is a supporting edge (63), the connecting rod (61) is sleeved with the through hole (52), and the supporting edge (63) is abutted with the lower surface of the piston (5); the upper end of the connecting rod (61) is fixedly connected with the lower part of the sleeve (4).
8. The linear travel pneumatic actuator according to claim 1, wherein the cylinder spring comprises an outer layer spring (811) and an inner layer spring (812), the outer layer spring (811) being the same as the axial center of the inner layer spring (812).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810090622.6A CN108071845B (en) | 2018-01-30 | 2018-01-30 | Straight-stroke pneumatic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810090622.6A CN108071845B (en) | 2018-01-30 | 2018-01-30 | Straight-stroke pneumatic actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108071845A CN108071845A (en) | 2018-05-25 |
| CN108071845B true CN108071845B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810090622.6A Active CN108071845B (en) | 2018-01-30 | 2018-01-30 | Straight-stroke pneumatic actuator |
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| Country | Link |
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| CN (1) | CN108071845B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4206900A (en) * | 1977-08-01 | 1980-06-10 | Borg-Warner Corporation | Valve operator |
| KR100752052B1 (en) * | 2007-05-17 | 2007-08-23 | 주식회사 코밸 | Actuator for a valve |
| CN203431288U (en) * | 2013-07-18 | 2014-02-12 | 杭州良工阀门有限公司 | Pneumatic piston actuating mechanism |
| CN203797010U (en) * | 2014-04-07 | 2014-08-27 | 薛瑞华 | Low-pressure brake valve |
| CN104806772A (en) * | 2015-04-27 | 2015-07-29 | 西峡龙成特种材料有限公司 | Self-grinding gas pipeline seal seat valve for high temperature and dust environments |
| CN205534487U (en) * | 2016-01-14 | 2016-08-31 | 上海华伍行力流体控制有限公司 | A hand electric changeover valve device for electric actuator |
| CN106499863A (en) * | 2016-12-04 | 2017-03-15 | 重庆永富电线电缆有限公司 | Pneumatic actuator structure for cable production |
| CN208331403U (en) * | 2018-01-30 | 2019-01-04 | 成都威登阀门技术有限公司 | Linear motion type pneumatic actuator |
-
2018
- 2018-01-30 CN CN201810090622.6A patent/CN108071845B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4206900A (en) * | 1977-08-01 | 1980-06-10 | Borg-Warner Corporation | Valve operator |
| KR100752052B1 (en) * | 2007-05-17 | 2007-08-23 | 주식회사 코밸 | Actuator for a valve |
| CN203431288U (en) * | 2013-07-18 | 2014-02-12 | 杭州良工阀门有限公司 | Pneumatic piston actuating mechanism |
| CN203797010U (en) * | 2014-04-07 | 2014-08-27 | 薛瑞华 | Low-pressure brake valve |
| CN104806772A (en) * | 2015-04-27 | 2015-07-29 | 西峡龙成特种材料有限公司 | Self-grinding gas pipeline seal seat valve for high temperature and dust environments |
| CN205534487U (en) * | 2016-01-14 | 2016-08-31 | 上海华伍行力流体控制有限公司 | A hand electric changeover valve device for electric actuator |
| CN106499863A (en) * | 2016-12-04 | 2017-03-15 | 重庆永富电线电缆有限公司 | Pneumatic actuator structure for cable production |
| CN208331403U (en) * | 2018-01-30 | 2019-01-04 | 成都威登阀门技术有限公司 | Linear motion type pneumatic actuator |
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| Publication number | Publication date |
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| CN108071845A (en) | 2018-05-25 |
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