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A Method for Matching Quarter-stroke Pneumatic Actuator and Manual Valve Body
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A technology of pneumatic actuators and manual valves, applied in valve operation/release device, lift valve, valve details, etc., can solve the problems of long processing cycle, high cost, increased cost, etc., to reduce maintenance time, reduce cost, The effect of reducing maintenance costs
Active Publication Date: 2021-09-10
师宗煤焦化工有限公司
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Description
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Problems solved by technology
The first method is expensive and should not be used unless necessary; in the process of using the second method, there may be a problem: the bolt holes at the connection between the pneumatic actuator and the new valve body are misaligned, resulting in failure to install. It appears in valves with a diameter of 100mm and below, and the corresponding bolt holes are dislocated at a certain angle (such as 45°); moreover, since the new valve body or the old valve body must be fixed on the original pipeline, the installation position is fixed
In order to solve this problem, at present, the manual valve body is sent to the machine tool for re-drilling and then installed. However, the method of punching and matching after processing has the problems of long processing cycle and additional cost, which is not conducive to smooth and continuous production.
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Embodiment 1
[0025] The bolt holes at the connection between the pneumatic actuator and the new valve body are misaligned by 45°:
[0026] As shown in the figure, the method of matching the quarter-turn pneumatic actuator with the manual valve body includes the following steps:
[0027] Step 1: Keep the pneumatic valve in the closed position, disengage the actuator from the old valve body, and remove the old valve body;
[0028] Step 2: Keep the spool of the new valve body to be replaced in a tightly closed position, and install it at the original position of the old valve body;
[0029] Step 3: Remove the gear shaft positioning spring on the upper part of the pneumatic actuator, and separate the gear shaft from the rack;
[0030] Step 4: Install and connect the removed gear shaft with the shaft of the new valve body, such as through key connection;
[0031] Step 5: Rotate the actuator body to align the actuator screw hole with the valve body screw hole, and insert the actuator into the ...
Embodiment 2
[0034] The bolt holes at the connection between the pneumatic actuator and the new valve body are misaligned by 90°:
[0035] As shown in the figure, the method of matching the quarter-turn pneumatic actuator with the manual valve body includes the following steps:
[0036] Step 1: Keep the pneumatic valve in the closed position, disengage the actuator from the old valve body, and remove the old valve body;
[0037] Step 2: Keep the spool of the new valve body to be replaced in a tightly closed position, and install it at the original position of the old valve body;
[0038] Step 3: Remove the gear shaft positioning spring on the upper part of the pneumatic actuator, and separate the gear shaft from the rack;
[0039] Step 4: Install and connect the removed gear shaft with the shaft of the new valve body, such as through key connection;
[0040] Step 5: Rotate the actuator body to align the actuator screw hole with the valve body screw hole, and insert the actuator into the ...
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Abstract
The invention discloses a method for matching an angular stroke pneumatic actuator with a manual valve body. According to the working principle of the actuator, the position of the gear shaft is kept fixed with the valve body, the actuator body is separated from the gear shaft, and the actuator body is rotated to a certain Angle, and then insert the gear shaft to change the meshing position of the gear shaft and the piston rack to achieve matching installation. After the installation is completed, the actuator and the valve body surface are relatively dislocated, the rack stroke remains unchanged, and the gear shaft is still at 0 Rotate within the range of ~90° to realize the normal use of the valve. The invention does not need to re-machine and punch holes on the valve body, reduces maintenance time and cost, is suitable for rapid maintenance of all the same types of pneumatic actuators and valves, the rotation angle of the gear shaft can be rotated as required, and can quickly solve the problem of pneumatic actuators and valves. The problem of dislocation of the screw holes at the body connection enables the pneumatic actuator and the valve body to be successfully connected and used normally.
Description
technical field [0001] The invention belongs to the technical field of quarter-stroke pneumatic valve maintenance and relates to a method for matching a quarter-stroke pneumatic actuator with a manual valve body. Background technique [0002] There are many quarter-stroke pneumatic valves installed and used by industrial enterprises, which are composed of quarter-stroke pneumatic actuators and valve bodies, and are commonly found in pneumatic butterfly valves and pneumatic ball valves. The working principle of commonly used angular stroke pneumatic actuators is: the piston rack is driven by compressed air, and the rack drives the output shaft to output power in the form of torque, so that the valve core rotates between 0° and 90° to open and close. [0003] When the valve is used for a certain period of time, the sealing surface of the valve is damaged and the valve cannot be closed tightly or the valve body is damaged in other ways. At this time, the valve needs to be repla...
Claims
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Application Information
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