Manual actuating mechanism for driving large-torque butterfly valve

Abstract

The utility model relates to a manual actuating mechanism for driving a large-torque butterfly valve, which comprises a mounting plate and a driving handle, a connecting shaft sleeve externally connected with a valve shaft is arranged on the driving handle, and an arc-shaped guide groove and a plurality of limiting holes are designed on the mounting plate to respectively serve as a stepless adjusting fixed gear and a step adjusting fixed gear. The driving handle is arranged on the mounting plate, the adjusting knob knots with two gears are designed on the driving handle, the two adjusting knob knots are matched with the two gears to combine the driving handle and the mounting plate to form the manual actuating mechanism, the actuating mechanism can perform two adjusting modes of step and stepless, and when the rotating angle is wide, the manual actuating mechanism can be adjusted in a stepped mode and a stepless mode. The position meeting the requirement can be quickly adjusted through the step adjusting end, and when the change of the rotating angle is very small, the operability is higher through the adjusting mode of the stepless adjusting end.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary valves, in particular to a manual actuator for driving a large torque butterfly valve. Background Art

[0002] Butterfly valves are widely used in various scenarios because of their small installation space and light weight. Their drive forms include manual, worm gear drive, electric, pneumatic, hydraulic, etc. Among them, manual drive has relatively low cost, low maintenance cost and high stability. At present, the rotation angle control of manually driven butterfly valves on the market is divided into two types: stepped adjustment and stepless adjustment. The so-called stepped adjustment is to set a fixed angle value according to the known valve plate rotation angle, and can only be adjusted within a fixed value range. The advantage is that the selection of known angles is faster and more convenient; while stepless adjustment is an unlimited adjustment and conversion of angle values, and the adjustment range is wider than that of stepped adjustment. However, in actual applications, there may be deviations between the known angle setting and the actual one, or the change in flow in the pipeline requires flow balancing, etc., in which case the valve plate angle of the rotating valve shaft needs to be readjusted. If the two forms of adjustment can be combined to take their respective advantages, the known angle of rotation can be quickly positioned through stepless adjustment, and small-range fine-tuning can be performed through stepless adjustment when the angle changes, such as the coarse focusing screw and fine focusing screw functions of a microscope. In this way, the actuator driving the butterfly valve will be more operable, and in the face of different angle adjustment situations, the corresponding convenient adjustment method can be adopted. Currently, there is no actuator driving the butterfly valve that integrates stepless adjustment and stepless adjustment on the market. Utility Model Content

[0003] In view of the above problems, the utility model proposes a manual actuator for driving a large torque butterfly valve, which combines stepped adjustment and stepless adjustment on the same driving handle so as to adopt different forms of adjustment methods for angle adjustment in different situations.

[0004] To achieve the above objectives, the following technical solutions are adopted: a manual actuator for driving a large-torque butterfly valve, comprising a mounting plate and a driving handle, a connecting sleeve of an external valve shaft being provided on the driving handle, two mounting through holes being symmetrically provided on the driving handle with the connecting sleeve as the center, and nuts and mounting threaded knob caps being welded at the positions of the mounting through holes of the driving handle respectively, and a positioning knob with a threaded pin being installed on the nut; a connecting shaft avoidance hole, an arc-shaped guide groove and a plurality of limiting holes being provided on the mounting plate, the arc-shaped guide groove being located on the circular arc path through which the threaded knob cap rotates with the external valve shaft as the center, a plurality of limiting holes being located on the circular arc path through which the positioning knob rotates with the external valve shaft as the center, the connecting shaft avoidance hole being concentric with the connecting sleeve, one end of the positioning knob of the driving handle being connected to the mounting plate by means of a threaded pin and a limiting hole, and one end of the threaded knob cap being connected to the mounting plate by means of a round-head square neck bolt and an arc-shaped guide groove.

[0005] Furthermore, a pointer is provided on the driving handle, and a rotation angle scale is provided on the plate surface of the mounting plate, and the rotation angle scale is located on the rotation path of the pointer.

[0006] Further, the pointer rotation path is concentric with the connecting sleeve.

[0007] Furthermore, a rotating handle is installed on the driving handle.

[0008] Furthermore, the connecting sleeve is a square hole connecting sleeve.

[0009] Furthermore, mounting bolts are provided on the mounting plate.

[0010] The beneficial effects of the utility model are as follows: the utility model designs an arc guide groove and a plurality of limit holes on the mounting plate as stepless adjustment fixed gears and stepped adjustment fixed gears respectively, and designs adjustment knobs with two gears on the driving handle. The two adjustment knob structures cooperate with the two gears to combine the driving handle and the mounting plate to form a manual actuator. The actuator can perform both stepped and stepless adjustment modes. When the rotation angle is relatively wide, the stepped adjustment end can be used to quickly adjust to a position that meets the requirements. When the rotation angle changes very little, the stepless adjustment end can be used to adjust the position, which makes the operability stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is the front view of the utility model;

[0013] Figure 3 It is a side view of the utility model;

[0014] Figure 4 It is a top view of the utility model;

[0015] Figure 5 It is a schematic diagram of the connection between the mounting plate and the round head square neck bolt.

[0016] As shown in the figure: 1. Mounting plate; 2. Driving handle; 3. Connecting sleeve; 4. Nut; 5. Threaded knob cap; 6. Positioning knob; 7. Threaded pin; 8. Round head square neck bolt; 9. Rotation angle scale; 10. Rotating handle; 11. Mounting bolt; 100. Connecting shaft avoidance hole; 101. Arc guide groove; 102. Limit hole; 200. Pointer; 900. Square neck. DETAILED DESCRIPTION

[0017] Example 1

[0018] The following is further described with reference to the accompanying drawings: Figure 1-5A manual actuator for driving a large torque butterfly valve is provided, comprising a mounting plate 1 and a driving handle 2, wherein the driving handle 2 is provided with a connecting sleeve 3 for an externally connected valve shaft, and the driving handle 2 is symmetrically provided with two mounting through holes with the connecting sleeve 3 as the center, and a nut 4 and a threaded knob cap 5 are welded at the positions of the mounting through holes of the driving handle 2 respectively, a positioning knob 6 with a threaded pin 7 is installed on the nut 4, the threaded knob cap 5 serves as the operating end of the stepless adjustment end, and the positioning knob 6 serves as the operating end of the stepless adjustment end.

[0019] The mounting plate 1 is provided with a connecting shaft avoidance hole 100, an arc guide groove 101 and a plurality of limit holes 102. The arc guide groove 101 is located on the arc path through which the threaded knob cap 5 rotates with the external valve shaft as the center. The plurality of limit holes 102 are located on the arc path through which the positioning knob 6 rotates with the external valve shaft as the center. The corresponding rotation angle is calculated for the opening position of each limit hole 102.

[0020] The connecting shaft avoidance hole 100 is concentric with the connecting shaft sleeve 3 so that the valve shaft is connected to the connecting shaft sleeve 3.

[0021] One end of the positioning knob 6 of the driving handle 2 is connected to the mounting plate 1 through the threaded pin 7 and the limiting hole 102, and one end of the threaded knob cap 5 is connected to the mounting plate 1 through the round head square neck bolt 8 and the arc guide groove 101.

[0022] When installed on a butterfly valve, the mounting plate 1 of the actuator is mounted on the valve body of the butterfly valve or on the connecting bracket, and the connecting sleeve 3 is connected to the valve shaft.

[0023] When the opening and closing angle of the valve plate of the butterfly valve is known, a step-by-step adjustment method is used for adjustment. First, the threaded knob cap 5 and the positioning knob 6 are loosened to ensure that the connection point between the round-head square neck bolt 8 and the arc-shaped guide groove 101 is a movable end, and the connection point between the positioning knob 6 and the limiting hole 102 is a movable end, so that the driving handle 2 can rotate around the valve shaft. When the limiting hole 102 corresponding to the known opening and closing angle is selected, the positioning knob 6 is tightened to fix the end, and the threaded knob cap 5 can also be tightened at the same time to ensure that the square neck of the round-head square neck bolt 8 is located in the arc-shaped guide groove 101 to fix the end;

[0024] When the valve plate of the butterfly valve needs to change a small angle, a stepless adjustment method is used for adjustment. First, the threaded knob cap 5 and the positioning knob 6 are loosened to ensure that the connection point between the round head square neck bolt 8 and the arc guide groove 101 is a movable end, and the connection point between the positioning knob 6 and the limiting hole 102 is a movable end, so that the driving handle 2 can rotate around the valve shaft. The required opening and closing angle is adjusted by rotating the driving handle 2. After finding the angle, the threaded knob cap 5 is tightened to ensure that the square neck 800 of the round head square neck bolt 8 is located in the arc guide groove 101 to fix this end. At this time, the positioning knob 6 has no corresponding limiting hole 102, so it can be kept loosened.

[0025] In order to further optimize the stepless adjustment method for quickly adjusting the angle, a pointer 200 is provided on the driving handle 2, and a rotation angle scale 9 is engraved on the surface of the mounting plate 1. The rotation angle scale 9 is located on the rotation path of the pointer 200, and ensures that the rotation path of the pointer 200 is concentric with the connecting sleeve 3. This position setting ensures that the pointer 200 rotates concentrically with the valve shaft. The rotation angle of the valve shaft is the rotation angle of the pointer 200, and there is no need to recalculate to determine the value of the rotation angle scale.

[0026] In order to further facilitate the rotation of the driving handle 2 , a rotating handle 10 is installed on the driving handle 2 .

[0027] In order to prevent the connecting sleeve 3 from sliding at the joint with the valve shaft and preventing the locking from being loose, a square hole connecting sleeve is used for the connecting sleeve, and the corresponding shaft end is a square valve shaft.

[0028] In order to facilitate the installation of the mounting plate 1 on the valve body of the butterfly valve or the connecting bracket, mounting bolts 11 are provided on the mounting plate. This structure can be installed by bolt connection or welding.

[0029] The present invention is not limited to this embodiment, and any equivalent concepts or changes within the technical scope disclosed in the present invention are included in the protection scope of the present invention.

Claims

1. A manual actuator for driving a high-torque butterfly valve, comprising a mounting plate (1) and a driving handle (2), wherein the driving handle (2) is provided with a connecting sleeve (3) for externally connecting a valve shaft, characterized in that: The driving handle (2) is symmetrically provided with two mounting through holes with the connecting shaft sleeve (3) as the center, and a nut (4) and a mounting threaded knob cap (5) are welded at the respective mounting through holes of the driving handle (2), and a positioning knob (6) with a threaded pin (7) is installed on the nut (4); a connecting shaft avoidance hole (100), an arc-shaped guide groove (101) and a plurality of limit holes (102) are provided on the mounting plate (1), and the arc-shaped guide groove (101) is located at the threaded knob cap (5) with the valve shaft connected to the outside as the center. A plurality of limit holes (102) are located on the arc path through which the positioning knob (6) rotates with the external valve shaft as the center, the connecting shaft avoidance hole (100) is concentric with the connecting shaft sleeve (3), one end of the positioning knob (6) of the driving handle (2) is connected to the mounting plate (1) through a threaded pin (7) and the limit hole (102), and one end of the threaded knob cap (5) is connected to the mounting plate (1) through a round head square neck bolt (8) and the arc guide groove (101).

2. The manual actuator for driving a high-torque butterfly valve according to claim 1, characterized in that: The driving handle (2) is provided with a pointer (200), and the surface of the mounting plate (1) is provided with a rotation angle scale (9), and the rotation angle scale (9) is located on the rotation path of the pointer (200).

3. The manual actuator for driving a high-torque butterfly valve according to claim 2, characterized in that: The rotation path of the pointer (200) is concentric with the connecting sleeve (3).

4. The manual actuator for driving a high-torque butterfly valve according to claim 3, characterized in that: A rotating handle (10) is installed on the driving handle (2).

5. The manual actuator for driving a high-torque butterfly valve according to claim 4, characterized in that: It is characterized in that The connecting sleeve (3) is a square hole connecting sleeve.

6. The manual actuator for driving a high-torque butterfly valve according to claim 5, characterized in that: The mounting plate (1) is provided with mounting bolts (11).

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