Valve electric actuator with locking mechanism

Abstract

The utility model discloses a valve electric actuator with a locking mechanism, which relates to the technical field of valve electric actuators, and comprises a valve body, a rubber sleeve is fixedly connected on the inner wall of the valve body, an upper valve rod and a lower valve rod are symmetrically arranged at two ends of the inner wall of the valve body, the upper valve rod and the lower valve rod are sleeved with a sleeve, a butterfly plate is fixedly connected on the sleeve, and a locking mechanism is arranged on the butterfly plate. The lower valve rod is provided with a locking assembly on the outer wall of the valve body, and the upper valve rod is provided with a transmission assembly on the outer wall of the valve body. Through the cooperation of the worm gear and the worm and the cooperation of the first bevel gear and the two second bevel gears in the transmission assembly, the transmission ratio can be changed conveniently, the transmission accuracy is improved, the function of accurately controlling the rotating angle of the valve rod can be achieved, and the problem that when an existing electric actuator for the valve is manually adjusted, manual adjustment is not convenient is solved. The problems that a valve cannot effectively close a pipeline and liquid permeates due to excessive rotation of a valve element of the butterfly valve caused by manual rotation of a hand wheel are solved, and the accuracy and the sealing performance of valve control are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve electric actuator technical field especially valve electric actuator with locking mechanism. BACKGROUND

[0002] In modern industrial field, valve electric actuator plays a vital role, it is with electric energy as main energy source, can accurate drive valve, is widely used in various fluid control systems, because it contains a large number of precision electrical components, to ensure the safe and stable operation under different working conditions, it has strict requirements to its explosion-proof, protection level (waterproof, dustproof), according to the working condition, can be divided into explosion-proof type and ordinary type, in our country, according to voltage, it is mainly divided into AC380V, AC220V and DC24V, according to the actuator action mode, there are switch type and regulating type again,

[0003] The existing valve electric actuator can make the motor not work through the control mechanism when the motor of the valve electric actuator is damaged, and then the electric actuator drives the valve to continue to work through the hand wheel, however, the hand wheel is manually rotated, which can easily cause the valve core of the butterfly valve to rotate excessively and cannot effectively close the pipeline, so that liquid can penetrate out, therefore, the above problems need to be improved. TECHNICAL SOLUTION

[0004] The utility model provides a valve electric actuator with locking mechanism to solve the problems in the prior art.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme: a valve electric actuator with locking mechanism, including valve body, the valve body inner wall is fixedly connected with rubber cover, the valve body inner wall both ends are symmetrically provided with upper valve rod and lower valve rod, the upper valve rod and lower valve rod are all connected with sleeve, the sleeve is fixedly connected with butterfly plate, the lower valve rod is located at the valve body outer wall and is provided with locking assembly, the upper valve rod is located at the valve body outer wall and is provided with transmission assembly.

[0006] Preferably, the transmission assembly includes a first outer sleeve fixed to the outer wall of the valve body, a transmission box is connected to the end flange of the first outer sleeve, the first outer sleeve is sleeved with the upper valve rod part of the shaft, the end of the upper valve rod is located in the transmission box and is coaxially fixed with a worm gear, the upper end of the worm gear is meshed and connected with a worm, one end of the worm is provided with a first bevel gear, and the other end of the worm is rotatably connected with the inner wall of the transmission box.

[0007] Preferably, the first bevel gear is meshed and connected with two second bevel gears at the upper and lower ends, the second bevel gears at the upper end are coaxially fixed with a first rotating shaft, and the top end of the first rotating shaft penetrates through the top surface of the transmission box.

[0008] Preferably, the top end of the first rotating shaft is fixedly connected with a hand wheel, and the second bevel gears of which the lower end one is coaxially fixedly connected with a driving motor installed at the outer wall of the bottom surface of the transmission box.

[0009] Preferably, the locking assembly comprises two symmetrical pressing pieces fixedly connected on the outer wall of the lower valve rod, and arc-shaped grooves are symmetrically formed on the pressing pieces.

[0010] Preferably, the arc-shaped grooves are provided with buckling protrusions at the two ends, the lower valve rod is sleeved with a second outer sleeve at the outer wall of the valve body, two pressing screws are symmetrically arranged on the outer sleeve, and the bottom end of the pressing screw abuts against the bottom surface of the arc-shaped groove.

[0011] Compared with the prior art, the utility model has the advantages that: the worm and the worm gear, the first bevel gear and the two second bevel gears in the transmission assembly are matched, the change of the transmission ratio is facilitated, the accuracy of transmission is improved, the accurate control function of the rotation angle of the valve rod is realized, the arc-shaped groove on the pressing piece in the locking assembly is matched with the pressing screw, when the lower valve rod is manually adjusted, the lower valve rod drives the pressing piece and the arc-shaped groove to rotate, the bottom end of the pressing screw gradually abuts from the deeper position to the shallower position of the arc-shaped groove, with the rotation, the rotation speed and the amplitude of the lower valve rod can be effectively limited, the rotation amount of the lower valve rod is accurately controlled, the accuracy of the control of the valve port size during the manual adjustment is improved, finally, when the valve port is adjusted to the position, the pressing screw can be arranged in the buckling protrusions at the two ends of the arc-shaped groove, the further rotation of the lower valve rod is prevented, the problem that the valve core of the butterfly valve is excessively rotated due to the manual rotation of the hand wheel during the manual adjustment of the existing valve electric actuator, the valve cannot be effectively closed to the pipeline, and the liquid penetrates is solved, and the accuracy and the sealing performance of the valve control are improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings, which are included to provide a further understanding of the utility model, form a part of the application and schematically illustrate the embodiments of the utility model and the explanations of the embodiments, and do not constitute improper limitations on the utility model. In the drawings:

[0013] Figure 1 It is a first perspective view of the overall structure of the utility model.

[0014] Figure 2 It is a first perspective view of the overall sectional structure of the utility model.

[0015] Figure 3 It is a second perspective view of the overall sectional structure of the utility model.

[0016] Figure 4The second outer sleeve overall structure schematic view is provided for the utility model.

[0017] Figure 5 The second outer sleeve overall sectional structure schematic view is provided for the utility model.

[0018] In the figure, serial number: 1, valve body; 2, lower valve rod; 3, upper valve rod; 4, rubber sleeve; 5, sleeve; 6, butterfly plate; 7, worm wheel; 8, worm; 9, hand wheel; 10, driving motor; 11, pressing piece; 12, second outer sleeve. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0020] Embodiment: see Figures 1-5The utility model discloses a valve electric actuator with locking mechanism, including valve body 1, the rubber bushing 4 of fixed joint is established on valve body 1 inner wall, the upper valve stem 3 and lower valve stem 2 are symmetrically equipped with on valve body 1 inner wall both ends, the sleeve 5 of upper valve stem 3 and lower valve stem 2 all are with sleeve connection, the butterfly plate 6 of fixed joint is established on sleeve 5, and the locking assembly is equipped with in the lower valve stem 2 location valve body 1 outer wall, and the transmission assembly is equipped with in the upper valve stem 3 location valve body 1 outer wall, and this structure builds up the overall framework of valve electric actuator, and valve body 1 is as the main body and carries each component, and the rubber bushing 4 enhances the sealing property in valve body 1 inside, and the cooperation of upper valve stem 3, lower valve stem 2 and sleeve 5, butterfly plate 6 can realize the opening and closing action of valve, and the locking assembly and transmission assembly provide the basis for subsequent accurate control valve, improve the functionality and sealing property of actuator, and then realize the basic control and preliminary sealing function of valve, and the transmission assembly includes the first outer sleeve pipe of fixed joint on valve body 1 outer wall, and the transmission box is connected with the flange of first outer sleeve pipe end, and the first outer sleeve pipe sleeve connection upper valve stem 3 partial stem body, and the worm wheel 7 is coaxially fixed in transmission box and is connected with the upper end of worm wheel 7, and the upper end of worm wheel 7 is connected with the worm 8 of meshing, and one end of worm 8 is equipped with the first bevel gear, and the other end of worm 8 is rotatably connected with transmission box inner wall, and the transmission assembly utilizes the meshing transmission of worm wheel 7, worm 8 and first bevel gear, changes transmission ratio, makes power transmission more stable, accurate, improves the accuracy of valve stem rotation angle control, and then can accurately adjust the opening of valve, through this transmission mode, can efficiently and accurately transmit the power of driving motor 10 to upper valve stem 3, compared with traditional simple transmission, improves transmission accuracy, effectively improves the accuracy of valve opening adjustment, and the upper and lower ends of first bevel gear are connected with two second bevel gears, and the first shaft is coaxially fixed in the second bevel gear of upper end of two second bevel gears, and the top end of first shaft penetrates transmission box top surface outer wall, and the power transmission path is optimized through the multistage transmission of bevel gear, and the first shaft extends the power to the outside of transmission box, which is convenient for manual operation or connection of other control devices, improves the convenience and flexibility of operation, can realize the adjustment of valve in multiple ways, this design makes the operator more labor-saving when manually adjusting, improves the convenience of manual operation.

[0021] In the utility model, the top end of the first rotating shaft is fixedly connected with a hand wheel 9, two second bevel gears of which the second bevel gear located at the lower end is coaxially fixedly connected with a driving motor 10 installed at the outer wall of the bottom surface of the transmission box, the hand wheel 9 and the driving motor 10 provide two control modes of manual and electric for the actuator, when the driving motor 10 fails, it can be switched to manual operation, improve the reliability and emergency handling capacity of the actuator, ensure that the valve can be adjusted under different conditions, after adopting the double control mode, the continuity of the valve control is effectively ensured, the locking assembly comprises two symmetrical compression pieces 11 fixedly connected on the outer wall of the end of the lower valve rod 2, two symmetrical arc grooves are formed on the two compression pieces 11, the bottom surface of the arc groove changes from shallow to deep along the circumferential direction, the arc groove of the locking assembly is designed uniquely, when the lower valve rod 2 rotates, it can realize locking of different degrees according to the depth of the arc groove by cooperating with other components, the rotation control precision of the lower valve rod 2 is improved, so that the opening of the valve is more accurately controlled, after using the locking assembly, compared with before using, the valve opening control precision is improved, the two ends of the arc groove are provided with buckle protrusions, the lower valve rod 2 is sleeved with a second outer sleeve 12 at the outer wall of the valve body 1, two compression screws are symmetrically arranged on the pipe body of the second outer sleeve 12, the end of the compression screw abuts against the bottom surface of the arc groove, during the rotation process of the manual adjustment of the lower valve rod 2, the compression screw moves in the arc groove, finally can be buckled into the buckle protrusion, effectively prevent the lower valve rod 2 from rotating excessively, improve the accuracy and safety of manual adjustment, solve the problem that the valve core rotates excessively during manual adjustment, causing the sealing to be not tight, ensure the sealing property and control precision of the valve, after adopting this structure, reduce the valve leakage problem caused by excessive rotation during manual adjustment.

[0022] Working principle: the utility model discloses, when using, have electric and manual two working modes, under electric mode, start drive motor 10, its coaxial fixed second bevel gear rotation is driven, the meshing of first bevel gear makes worm 8 rotate, and then drive the rotation of the worm wheel 7 that is coaxially fixed with upper valve stem 3, upper valve stem 3 drives the rotation of sleeve 5 and butterfly plate 6 fixed on sleeve 5 that are sleeved with it, realize the opening or closing of valve, the mutual cooperation of worm wheel 7, worm 8, bevel gear etc. in transmission assembly changes transmission ratio, improves transmission accuracy and stability, accurately controls the rotation angle of upper valve stem 3 to accurately adjust valve opening, when drive motor 10 fails or needs manual adjustment, enter manual mode, and the operator rotates hand wheel 9, and hand wheel 9 drives the rotation of second bevel gear through first pivot, and subsequent transmission is same with electric mode, and the power transmission path is optimized by multistage transmission of bevel gear, so that manual adjustment is more labor-saving, and the operation convenience and flexibility are improved, in the adjustment process, locking assembly plays a role, and the pressing piece 11 is symmetrically fixed on the outer wall of the end of lower valve stem 2, and the arc-shaped groove is arranged on the pressing piece 11 and the bottom surface depth circumferential direction gradually changes, and the both ends have buckle protruding blocks, and the second outer sleeve 12 is sleeved with lower valve stem 2 and is provided with pressing screw and is abutted with the arc-shaped groove bottom surface, when manually adjusting lower valve stem 2 rotates, the pressing screw moves in the arc-shaped groove, and different resistance is generated due to the depth change of the arc-shaped groove, and the rotation of lower valve stem 2 is limited, when adjusting to the appropriate opening, the pressing screw enters the buckle protruding block, prevents lower valve stem 2 from continuing to rotate, avoids the rotation of manual adjustment valve core from being too much, improves the accuracy and safety of manual adjustment, guarantees the valve sealing performance and control accuracy, and the device is used.

[0023] The above is only the preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art in the technical range disclosed by the utility model, according to the technical scheme and utility model concept of the utility model, equivalent replacement or change, should be covered in the protection scope of the utility model.

Claims

1. A valve electric actuator with a locking mechanism, comprising a valve body (1), characterized in that: A rubber sleeve (4) is fixedly connected to the inner wall of the valve body (1). An upper valve stem (3) and a lower valve stem (2) are symmetrically arranged at both ends of the inner wall of the valve body (1). The upper valve stem (3) and the lower valve stem (2) are both sleeved with a sleeve (5). A butterfly plate (6) is fixedly connected to the sleeve (5). A locking component is provided on the lower valve stem (2) at the outer wall of the valve body (1). A transmission component is provided on the upper valve stem (3) at the outer wall of the valve body (1).

2. The valve electric actuator with a locking mechanism according to claim 1, characterized in that: The transmission assembly includes a first outer sleeve fixed to the outer wall of the valve body (1), a transmission box connected to the flange at the end of the first outer sleeve, a portion of the upper valve stem (3) sleeved on the first outer sleeve, a worm gear (7) located inside the transmission box and coaxially fixed to the end of the upper valve stem (3), a worm (8) meshing with the upper end of the worm gear (7), a first bevel gear at one end of the worm (8), and a rotatable connection between the other end of the worm (8) and the inner wall of the transmission box.

3. A valve electric actuator with a locking mechanism according to claim 2, characterized in that: The upper and lower ends of the first bevel gear are meshed with two second bevel gears. The upper bevel gear is coaxially fixed to a first rotating shaft, and the top end of the first rotating shaft penetrates the outer wall of the top surface of the transmission box.

4. A valve electric actuator with a locking mechanism according to claim 3, characterized in that: A handwheel (9) is fixedly connected to the top of the first rotating shaft, and a drive motor (10) is coaxially fixedly connected to the lower bevel gear of the two second bevel gears on the outer wall of the bottom surface of the transmission box.

5. A valve electric actuator with a locking mechanism according to claim 4, characterized in that: The locking assembly includes two clamping plates (11) symmetrically fixed to the outer wall of the lower valve stem (2). The two clamping plates (11) are symmetrically provided with arc-shaped grooves, and the bottom surface of the arc-shaped grooves changes from shallow to deep along their circumference.

6. A valve electric actuator with a locking mechanism according to claim 5, characterized in that: The two ends of the arc groove are provided with snap-fit ​​protrusions. The lower valve stem (2) is sleeved with a second outer sleeve (12) on the outer wall of the valve body (1). Two clamping screws are symmetrically inserted on the tube body of the second outer sleeve (12). The end of the clamping screw abuts the bottom surface of the arc groove.

Images