阅读说明：本技术 一种角行程气动执行器与手动阀阀体匹配的方法 (Method for matching angular travel pneumatic actuator with manual valve body ) 是由 杨鹏 尹杨 缪洪用 张雷 高成红 雷碧怀 于 2019-11-15 设计创作，主要内容包括：本发明公开一种角行程气动执行器与手动阀阀体匹配的方法,根据执行器工作原理,保持齿轮轴位置与阀体结合不动,执行器本体与齿轮轴分离,以旋转执行器本体一定角度,再套入齿轮轴,改变齿轮轴与活塞齿条啮合位置的方法,实现匹配安装,安装完成后呈现执行器与阀体外表相对错位的状态,齿条行程不变,齿轮轴仍在0～90°范围内旋转,实现阀门正常使用。本发明无需在阀体上重新加工打孔,减少检修时间和降低成本,适用于所有同类型气动执行器和阀门的快速检修,齿轮轴旋转角度可按需旋转,能快速解决气动执行器与阀体连接处螺丝孔错位的问题,使气动执行器与阀体能够成功连接并正常使用。(The invention discloses a method for matching an angular travel pneumatic actuator with a manual valve body, which is characterized in that according to the working principle of the actuator, the position of a gear shaft is kept to be combined with the valve body, the actuator body is separated from the gear shaft, the actuator body is rotated by a certain angle, then the gear shaft is sleeved, and the meshing position of the gear shaft and a piston rack is changed, so that matched installation is realized, the state that the outer surfaces of the actuator and the valve body are relatively staggered is presented after the installation is finished, the travel of the rack is unchanged, the gear shaft still rotates within the range of 0-90 degrees, and the normal use of. The valve body does not need to be processed and punched again, the overhaul time is shortened, the cost is reduced, the valve is suitable for quick overhaul of all pneumatic actuators and valves of the same type, the rotation angle of the gear shaft can rotate as required, the problem of dislocation of screw holes at the joint of the pneumatic actuator and the valve body can be quickly solved, and the pneumatic actuator and the valve body can be successfully connected and normally used.)

1. A method for matching an angular travel pneumatic actuator with a manual valve body is characterized in that: the method comprises the following steps:

the first step is as follows: keeping the pneumatic valve at a closed position, disconnecting the actuator from the old valve body, and detaching the old valve body;

the second step is that: the valve core of the new valve body to be replaced keeps a tight closing position and is arranged at the original position of the old valve body;

the third step: taking down a gear shaft positioning clamp spring at the upper part of the pneumatic actuator, and separating the gear shaft from the rack;

the fourth step: mounting and connecting the taken-out gear shaft with a shaft of the new valve body;

the fifth step: the body of the rotary actuator is aligned with the screw hole of the actuator and the screw hole of the valve body, and the actuator is sleeved in the gear shaft, namely, the meshing position of the gear shaft and the piston rack rotates for a certain angle;

and a sixth step: and recovering the gear shaft positioning clamp spring at the upper part of the actuator to finish the installation.

2. The method of matching an angular travel pneumatic actuator to a manual valve body of claim 1, wherein: the installation connection of the third step is connected through a key.

3. The method of matching an angular travel pneumatic actuator to a manual valve body of claim 1, wherein: and a certain angle in the fifth step is an angle of dislocation of the bolt hole at the joint of the actuator and the new valve body.

Technical Field

The invention belongs to the technical field of maintenance of an angular travel pneumatic valve, and relates to a method for matching an angular travel pneumatic actuator with a manual valve body.

Background

Industrial enterprises install and use a plurality of angular travel pneumatic valves, which are composed of an angular travel pneumatic actuator and a valve body, and are commonly found in pneumatic butterfly valves and pneumatic ball valves. The working principle of the common angular travel pneumatic actuator is as follows: the piston type rack is driven by compressed air, and the rack drives the output shaft to output power in a torque mode, so that the valve core is rotationally opened and closed between 0 and 90 degrees.

After the valve is used for a certain time, the sealing surface of the valve is damaged, so that the valve cannot be closed tightly or other valve bodies are damaged, and the valve needs to be replaced or overhauled. The following two general methods of treatment are available: (1) directly connecting a pneumatic actuator to replace the whole pneumatic valve; (2) and the manual valve body is reassembled with the original actuator for use. The first method is high in cost and is not necessary to be used; in using the second method, a problem may arise: the bolt hole at the joint of the pneumatic actuator and the new valve body is staggered, so that the pneumatic actuator cannot be installed, the situation generally occurs in valves with the calibers of 100mm and below 100mm, and the bolt hole is staggered by a certain angle (such as 45 degrees) correspondingly; and, because new valve body or old valve body all must fix on original pipeline, the mounted position is fixed. In order to solve the problem, at present, the manual valve body is sent to a machine tool for re-punching and then installed, however, the method for matching the punching after machining has the problems of longer processing period and additional cost increase, and is not beneficial to the smooth and continuous production.

Therefore, on the premise of considering the control cost and meeting the production requirement and the maintenance speed, a method for rapidly solving the problem of the dislocation of the screw hole at the joint of the pneumatic actuator and the valve body is needed to be developed.

Disclosure of Invention

In order to solve the problem that the screw hole at the joint of the pneumatic actuator and the valve body is staggered, the invention aims to provide a method for matching the angular travel pneumatic actuator and the valve body of the manual valve, and the method has the advantages of high overhauling speed, cost saving, no need of processing and the like.

The invention is realized by the following technical scheme: a method for matching an angular travel pneumatic actuator with a manual valve body is characterized in that according to the working principle of the actuator, the position of a gear shaft is kept to be combined with the valve body, the actuator body is separated from the gear shaft, the actuator body (a rack and the body are integrated) is rotated by a certain angle (a screw hole dislocation angle), then the gear shaft is sleeved, the meshing position of the gear shaft and a piston rack is changed, matching installation is achieved, the state that the outer surfaces of the actuator and the valve body are dislocated relatively is presented after installation is completed, the travel of the rack is unchanged, the gear shaft rotates within the range of 0-90 degrees, and normal use of the valve is achieved, and the method:

the first step is as follows: keeping the pneumatic valve at a closed position, disconnecting the actuator from the old valve body, and detaching the old valve body;

the second step is that: the valve core of the new valve body to be replaced keeps a tight closing position and is arranged at the original position of the old valve body;

the third step: taking down a gear shaft positioning clamp spring at the upper part of the pneumatic actuator, and separating the gear shaft from the rack;

the fourth step: mounting and connecting the taken-out gear shaft with a shaft of the new valve body;

the fifth step: the body of the rotary actuator is aligned with the screw hole of the actuator and the screw hole of the valve body, and the actuator is sleeved in the gear shaft, namely, the meshing position of the gear shaft and the piston rack rotates for a certain angle;

and a sixth step: and recovering the gear shaft positioning clamp spring at the upper part of the actuator to finish the installation.

The installation connection of the third step is connected through a key.

And a certain angle in the fifth step is an angle of dislocation of the bolt hole at the joint of the actuator and the new valve body.

According to the invention, after the gear shaft is separated from the rack, the gear shaft is combined with the shaft of the new valve body, and then the pneumatic actuator body is rotated, so that the screw hole of the pneumatic actuator is aligned to the screw hole of the new valve body, and the pneumatic actuator is not simply rotated integrally, so that the gear shaft and the valve core of the new valve body cannot rotate together, and the normal opening and closing of the valve can be ensured. If the pneumatic actuator drives the valve core of the new valve body to rotate together when rotating, the valve cannot be opened or closed in place even if the installation is completed, and the valve cannot be used.

Compared with the prior art, the invention has the following advantages:

1. the pneumatic actuator does not need to be replaced, so that the maintenance cost is reduced;

2. when the screw hole at the joint of the valve body and the pneumatic actuator is staggered, the valve body does not need to be processed and punched again, so that the overhaul time is shortened and the cost is reduced;

3. the device is suitable for quick overhaul of all pneumatic actuators and valves of the same type, and the rotating angle of the gear shaft can rotate as required.

The invention can quickly solve the problem of dislocation of the screw hole at the joint of the pneumatic actuator and the valve body, so that the pneumatic actuator and the valve body can be successfully connected and normally used. The invention does not need to change other components of the original valve, such as a travel switch and a display component, and does not need to modify a pipeline.

Drawings

FIG. 1 is a schematic view of an angular travel pneumatic valve (taking a pneumatic butterfly valve as an example);

fig. 2 is a schematic diagram of the internal structure of the pneumatic actuator.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention and do not limit the protection scope of the present invention.