Opening control device of electric valve

Abstract

The utility model discloses an opening control device of an electrically operated valve in the technical field of electrically operated valves. The device comprises a control box, a support is installed in the control box, a motor is installed on the support, the motor is in linkage with a transmission gear through a transmission assembly, the transmission gear is arranged on a transmission rod, the transmission rod is connected with a valve rod of a valve, and a valve plate of the valve is arranged on the valve rod. Color identification parts are arranged on the two end faces of the transmission gear, two photoelectric switches are fixed in the control box, and the two photoelectric switches are symmetrically arranged on the two sides of the transmission gear; the color identification part comprises a plurality of first identification plates and a plurality of second identification plates, the first identification plates and the second identification plates are evenly and alternately arranged in the circumferential direction of the transmission gear, and the first identification plates and the second identification plates are installed on the end face of the transmission gear through fixing assemblies; the first identification plate is coated with a first color, the second identification plate is coated with a second color, and the first color and the second color have high contrast. The utility model has the advantage of improving the accuracy of opening control.

Description

Technical Field

[0001] This utility model relates to the field of electric valve technology, and in particular to an electric valve opening control device. Background Technology

[0002] The prior art discloses a photoelectric detection device for the opening degree of an electric valve, with authorization announcement number CN 204554028U and authorization announcement date of 2015.08.12. The device includes a bracket mounted on the motor housing, with a photoelectric photodiode fixed at one end of the bracket, and the surface of the actuating gear of the electric valve located below the photoelectric photodiode is coated with black and white striped scale markings.

[0003] However, the main problems are as follows: In the existing technology, the scale markings are directly coated on the surface of the gear. In actual use, the coated scale markings are prone to dirt residue or fading, resulting in inaccurate photoelectric detection of the light tube. Utility Model Content

[0004] The purpose of this invention is to provide an electric valve opening control device that improves the accuracy of opening control.

[0005] To achieve the above-mentioned objectives, the electric valve opening control device of this utility model adopts the following technical solution:

[0006] An electric valve opening control device includes a control box, a bracket installed inside the control box, a motor mounted on the bracket, the motor driving a transmission gear via a transmission assembly, the transmission gear mounted on a transmission rod connected to the valve stem, and a valve plate mounted on the valve stem; both the transmission assembly and the transmission gear are housed within the control box, and each end face of the transmission gear has a color marking section; two photoelectric switches are fixed inside the control box, symmetrically arranged on both sides of the transmission gear, one photoelectric switch fixed to the bracket and close to the color marking section on one end face of the transmission gear, and the other photoelectric switch fixed to the inner wall of the control box and close to the color marking section on the other end face of the transmission gear; the color marking section includes multiple first marking plates and multiple second marking plates, the first and second marking plates being evenly and alternately arranged along the circumference of the transmission gear, the edges of the first marking plates contacting the edges of the second marking plates, and both the first and second marking plates being mounted on the end face of the transmission gear via a fixing assembly; the first marking plates are coated with a first color, and the second marking plates are coated with a second color, the first and second colors having high contrast.

[0007] Preferably, the fixing assembly includes a positioning platform disposed on the end face of the transmission gear. The positioning platform has positioning grooves, and multiple positioning grooves are arranged radially along the circumference of the transmission gear. One end of each positioning groove away from the center of the transmission gear has an opening. Both the first and second marking plates have positioning blocks that mate with the positioning grooves. The positioning blocks are inserted into the positioning grooves from the openings, and the positioning blocks are T-shaped. The outer ends of both the first and second marking plates have fixing plates. The outer end of the positioning platform contacts the fixing plates. The outer end of the positioning platform has mounting holes, and the fixing plates have fixing holes. Fasteners pass through the mounting holes and fixing holes for locking. The fixing assembly of this invention has a simple structure; it only requires inserting the positioning blocks of the first or second marking plate into the positioning grooves, and then locking the fasteners through the mounting holes and fixing holes.

[0008] Preferably, a first magnet is provided at the bottom of the positioning groove, and a second magnet is provided on the positioning block. The first magnet and the second magnet have opposite poles and attract each other. When the positioning block is inserted into the positioning groove, the first magnet and the second magnet are attracted by magnetic force, which improves the stable installation of the positioning block in the positioning groove.

[0009] Preferably, the transmission assembly includes a drive shaft connected to the motor output shaft, the drive shaft is provided with a drive gear, and the drive gear meshes with and drives the transmission gear.

[0010] Preferably, the first color is black and the second color is white.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model sets color marking parts on the two end faces of the transmission gear and sets two photoelectric switches. One photoelectric switch detects one color marking part and the other photoelectric switch detects the other color marking part, thereby realizing cross-verification of data, avoiding single point of failure, and effectively preventing inaccurate detection caused by oil stains or fading of the color markings. The structure of this utility model is reasonable, increases data verification, and improves the accuracy of opening control.

[0013] 2. The color marking part of this utility model includes a first marking plate and a second marking plate that are evenly and alternately arranged along the circumference of the transmission gear. The first marking plate is provided with a first color, and the second marking plate is provided with a second color. Both the first marking plate and the second marking plate are installed on the end face of the transmission gear by a fixing component. Therefore, when it is contaminated by oil, it is only necessary to disassemble the contaminated part, repaint it with the color, and finally reinstall it on the transmission gear. This utility model assembles the color marking part in a modular manner, which is convenient to disassemble and replace, easy to use, and practical. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 Enlarged view of part A;

[0016] Figure 3 for Figure 2 Enlarged view of part B;

[0017] Figure 4 This is a structural diagram of the color identification section;

[0018] Figure 5 This is a schematic diagram of the installation of the first signboard;

[0019] Figure 6 This is a schematic diagram of the installation of the transmission gear and positioning groove.

[0020] Among them, 1 is the drive gear, 2 is the control box, 3 is the drive shaft, 4 is the bracket, 5 is the motor, 6 is the photoelectric switch, 7 is the transmission gear, 8 is the transmission rod, 9 is the valve rod, 10 is the valve plate, 11 is the first color, 12 is the first identification plate, 13 is the positioning block, 14 is the fixing plate, 15 is the fastener, 16 is the mounting hole, 17 is the positioning groove, 18 is the positioning platform, 19 is the second magnet, 20 is the first magnet, 21 is the second identification plate, and 22 is the opening. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and not for limiting the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0022] like Figure 1-6As shown, an electric valve opening control device includes a control box 2, a bracket 4 installed inside the control box 2, a motor 5 mounted on the bracket 4, the motor 5 driving a transmission gear 7 via a transmission assembly, the transmission gear 7 being mounted on a transmission rod 8, the transmission rod 8 being connected to the valve stem 9 of the valve, and the valve plate 10 of the valve being mounted on the valve stem 9; the transmission assembly includes a drive shaft 3 connected to the output shaft of the motor 5, the drive shaft 3 having a drive gear 1, the drive gear 1 meshing with and driving the transmission gear 7; both the transmission assembly and the transmission gear 7 are housed inside the control box 2, and both end faces of the transmission gear 7 are provided with color markings. Two photoelectric switches 6 are fixed inside the control box 2. The two photoelectric switches 6 are symmetrically arranged on both sides of the transmission gear 7. One photoelectric switch 6 is fixed to the bracket 4 and close to the color marking part of one end face of the transmission gear 7. The other photoelectric switch 6 is fixed to the inner wall of the control box 2 and close to the color marking part of the other end face of the transmission gear 7. The color marking part includes multiple first marking plates 12 and multiple second marking plates 21. The first marking plates 12 and the second marking plates 21 are evenly and alternately arranged along the circumference of the transmission gear 7. The edge of the first marking plate 12 is in contact with the edge of the second marking plate 21. The first marking plate 12 and the second marking plate 21 are both mounted on the end face of the transmission gear 7 via a fixing assembly. The fixing assembly includes a positioning platform 18 disposed on the end face of the transmission gear 7. The positioning platform 18 is provided with positioning grooves 17, and multiple positioning grooves 17 are arranged radially along the circumference of the transmission gear 7. The end of the positioning groove 17 away from the center of the transmission gear 7 is provided with an opening 22. The first marking plate 12 and the second marking plate 21 are both provided with positioning blocks 13 that are fitted into the positioning grooves 17. The positioning blocks 13 are inserted into the positioning grooves 17 from the openings, and the positioning blocks 13 are T-shaped. The bottom of the positioning groove 17 is provided with a first magnet 20. The positioning block 13 is provided with a second magnet 19, and the first magnet 20 and the second magnet 19 are attracted to each other by opposite poles; the outer ends of the first marking plate 12 and the second marking plate 21 are both provided with fixing plates 14, the outer end of the positioning platform 18 is in contact with the fixing plate 14, the outer end of the positioning platform 18 is provided with a mounting hole 16, the fixing plate 14 is provided with a fixing hole, and the fastener 15 passes through the mounting hole 16 and the fixing hole to lock it; the first marking plate 12 is coated with a first color 11, and the second marking plate 21 is coated with a second color. The first color 11 and the second color have high contrast. The first color 11 is black and the second color is white.

[0023] The specific working process and principle of this utility model are as follows: By setting a color marking part on the end face of the transmission gear 7, the color marking part includes a first marking plate 12 and a second marking plate 21 evenly and alternately arranged along the circumference of the transmission gear 7. The first marking plate 12 is black and the second marking plate 21 is white. Therefore, when the transmission gear 7 rotates, the photoelectric switch 6 detects the color and obtains the rotation data of the transmission gear 7, thereby realizing precise control of the valve opening. Furthermore, color marking parts are set on both end faces of the transmission gear 7. One photoelectric switch 6 detects one color marking part, and the other photoelectric switch 6 detects... Another color marking section enables cross-validation of data, avoids single-point failures, and effectively prevents inaccurate detection caused by oil stains or fading of the color markings. At the same time, the first marking plate 12 and the second marking plate 21 are both installed on the end face of the transmission gear 7 through fixing components. Therefore, when contaminated by oil, only the contaminated part needs to be disassembled, coated with color, and then installed on the transmission gear 7. During installation, only the positioning block 13 of the first marking plate 12 or the second marking plate 21 needs to be inserted into the positioning groove 17, and then the fastener 15 is passed through the mounting hole 16 and the fixing hole to lock it.

[0024] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. An electric valve opening control device, characterized in that: The system includes a control box, within which a bracket is mounted. A motor is mounted on the bracket, and the motor drives a transmission gear via a transmission assembly. The transmission gear is mounted on a transmission rod, which is connected to the valve stem of a valve. The valve plate is mounted on the valve stem. Both the transmission assembly and the transmission gear are housed within the control box. Each transmission gear has a color-coded marking on both end faces. Two photoelectric switches are fixed within the control box, symmetrically arranged on both sides of the transmission gear. One photoelectric switch is fixed to the bracket and abuts against the color-coded marking on one end face of the transmission gear, while the other is fixed to the inner wall of the control box and abuts against the color-coded marking on the other end face of the transmission gear. The color-coded marking includes multiple first marking plates and multiple second marking plates, evenly alternating along the circumference of the transmission gear. The edges of the first marking plates contact the edges of the second marking plates. Both the first and second marking plates are mounted on the end faces of the transmission gear via a fixing assembly. The first marking plates are coated with a first color, and the second marking plates are coated with a second color, exhibiting high contrast between the first and second colors.

2. The electric valve opening control device according to claim 1, characterized in that: The fixing assembly includes a positioning platform disposed on the end face of the transmission gear. The positioning platform has positioning grooves, and multiple positioning grooves are arranged radially along the circumference of the transmission gear. The end of the positioning groove away from the center of the transmission gear has an opening. The first and second marking plates are both provided with positioning blocks that are fitted into the positioning grooves. The positioning blocks are inserted into the positioning grooves from the openings. The positioning blocks are T-shaped. The outer ends of the first and second marking plates are both provided with fixing plates. The outer end of the positioning platform contacts the fixing plates. The outer end of the positioning platform has mounting holes, and the fixing plates have fixing holes. Fasteners pass through the mounting holes and fixing holes for locking.

3. The electric valve opening control device according to claim 2, characterized in that: The bottom of the positioning groove is provided with a first magnet, and the positioning block is provided with a second magnet. The first magnet and the second magnet are attracted to each other by opposite poles.

4. The electric valve opening control device according to claim 1, characterized in that: The transmission assembly includes a drive shaft that is connected to the output shaft of the motor. The drive shaft is equipped with a drive gear, which meshes with and drives a transmission gear.

5. The electric valve opening control device according to claim 1, characterized in that: The first color is black, and the second color is white.

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