Valve electric execution device with photoelectric encoder

Abstract

The utility model relates to a valve electric actuating device with a photoelectric encoder, which comprises a valve electric actuating device main body, a stroke transmission assembly arranged on the valve electric actuating device main body, and an induction assembly used for inducting the specific position of a valve, and the output end of the stroke transmission assembly is provided with an output gear. The sensing assembly comprises a mounting bracket, a multi-stage transmission gear, an infrared transmitting element and an infrared receiving element. According to the valve electric execution device with the photoelectric encoder, the infrared transmitting elements and the infrared receiving elements are matched with all levels of transmission gears, opening and closing of a valve can be accurately controlled, the accurate opening position of the valve can be provided at any time, and therefore the safety and effectiveness of the valve electric execution device in the using process are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electric valve actuators, in particular to an electric valve actuator with a photoelectric encoder. Background Art

[0002] At present, conventional valve electric devices use mechanical counters for stroke control and are equipped with micro switches. Mechanical counters may have gear failures and micro switch failures.

[0003] Therefore, the research and development direction of the stroke control of the valve electric device is to adopt electronic control. Utility Model Content

[0004] In response to the above problems, the utility model proposes a valve electric actuator with a photoelectric encoder. The photoelectric encoder has a wide working range (from tens of turns to thousands of turns) and high control accuracy. It can accurately control the fully open position and fully closed position of the valve and provide accurate data when the valve is in any position, so as to solve the problems raised in the above background technology.

[0005] The utility model is realized through the following technical solutions:

[0006] A valve electric actuator with a photoelectric encoder includes a valve electric actuator body and a stroke transmission component arranged on the valve electric actuator body, the output end of the stroke transmission component is provided with an output gear, and also includes a sensing component for sensing the specific position of the valve, the sensing component includes a mounting bracket, a multi-stage transmission gear, an infrared emitting element and an infrared receiving element, the mounting bracket is fixed to one end of the valve electric actuator body, the multi-stage transmission gear includes a plurality of transmission gears meshed in sequence, each transmission gear is rotatably connected to the mounting bracket, one of the transmission gears is meshed with the output gear, the infrared emitting element and the infrared receiving element have a plurality of groups, which are fixed to the mounting bracket and respectively arranged at the top and bottom ends of the edges of each transmission gear, and each transmission gear is provided with a through hole for the light of the infrared emitting element to pass through.

[0007] In a preferred embodiment of the utility model, the multi-stage transmission gear includes a first-stage transmission gear, a second-stage transmission gear, and a third-stage transmission gear that are meshed in sequence. The transmission ratio between each stage of the transmission gear is 1:10, and the first-stage transmission gear is meshed with the output gear.

[0008] Furthermore, two adjacent transmission gears are meshed with each other via a transition gear.

[0009] In order to accurately sense the position of the valve, each set of infrared emitting elements and infrared receiving elements has four pairs, which are respectively arranged at different positions of the corresponding transmission gears.

[0010] In order to facilitate disassembly, assembly and maintenance, a group of relatively arranged support plates are fixed on the mounting bracket, and the infrared emitting element and the infrared receiving element are fixed on the support plates.

[0011] The beneficial effect of the utility model is that the valve electric actuator with a photoelectric encoder can accurately control the opening and closing of the valve through the infrared emitting elements and the infrared receiving elements in cooperation with the transmission gears of each level, and can provide the precise position of the valve opening at any time, thereby ensuring the safety and effectiveness of the valve electric actuator when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the electric valve actuator with a photoelectric encoder of the utility model;

[0013] Figure 2 It is a schematic diagram of the front and back structures of the transmission gear of the utility model;

[0014] Figure 3 This is a schematic diagram of the distribution positions of the infrared emitting element and the infrared receiving element of the utility model;

[0015] Figure 4 This is the coding table of the photoelectric encoder of the utility model. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more explicit definition of the protection scope of the present invention. In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "side", "end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0017] like Figure 1 The electric valve actuator with a photoelectric encoder shown in the figure comprises a valve electric actuator body 1 and a travel transmission assembly 2 arranged on the valve electric actuator body 1, an output gear 21 is arranged at the output end of the travel transmission assembly 2, and also comprises a sensing assembly for sensing the specific position of the valve, the sensing assembly comprises a mounting bracket 4, a multi-stage transmission gear 31, an infrared emitting element 32 and an infrared receiving element 33 (photoelectric encoder);

[0018] The mounting bracket 4 is fixed to the top of the valve electric actuator body 1 by a plurality of screws, and a group of relatively arranged support plates 41 are fixed to the mounting bracket 4 by screws 42;

[0019] The multi-stage transmission gear 31 includes three sequentially meshed first-stage transmission gears, second-stage transmission gears, and third-stage transmission gears, and the transmission ratio between each stage of the transmission gears is 1:10. The first-stage transmission gear is meshed with the output gear 21, and each transmission gear is rotatably connected to the mounting bracket 4 through a rotating shaft, and two adjacent transmission gears are meshed through a transition gear 34;

[0020] The infrared emitting elements 32 and the infrared receiving elements 33 have multiple groups, which are fixed on the support plate 41 and respectively arranged at the top and bottom ends of the edges of each transmission gear, and each group of infrared emitting elements 32 and infrared receiving elements 33 has four pairs, which are respectively arranged at different positions of the corresponding transmission gears. Each transmission gear is provided with a through hole for the light of the infrared emitting element 32 to pass through.

[0021] like Figure 2 , Figure 3 The transmission gear 31 shown in the figure has through holes 35 distributed in a certain pattern on the transmission gear. An infrared emitting element is arranged at the lower part of the transmission gear, and an infrared receiving element is arranged above the transmission gear facing the infrared emitting element. Each group of photoelectric encoders has 4 pairs, namely A, B, C, and D. Figure 4 As shown, when the transmission gear rotates, when the through hole of the gear coincides with the infrared emitting element and the infrared receiving element, the infrared receiving element receives the signal. Through these four signal conditions, the position of the transmission gear can be determined and a certain number can be assigned, which is the so-called encoding. In addition, the transmission of each level of transmission gear is executed according to a certain rule. When the first-level transmission gear rotates 1 circle, the transition gear and the second-level transmission gear rotate 2 teeth respectively. The second-level transmission gear has 20 teeth, that is, the second-level transmission gear rotates one-tenth of a circle, and the first-level transmission gear and the second-level transmission gear form a decimal system. The first-level transmission gear is the ones gear, the second-level transmission gear is the tens gear, and the third-level transmission gear is the hundreds gear... When the valve electric device is working, the ones gear rotates synchronously, while the other gears do not move. Only when the two teeth of the ones gear mesh with the transition gear, the tens gear rotates... The photoelectric encoder must be set at the gear through hole to read the number at any time. The through holes on different transmission gears coincide with the photoelectric encoders. There is signal transmission between the photoelectric encoders. The infrared receiving element receives the signal, which means that the ten-digit teeth and the teeth above ten-digit teeth have signals at any time. The signal conditions of each group of photoelectric encoders can determine a number. The comprehensive digits can determine that the photoelectric encoder outputs a different number at any position. Within the rotation range of the photoelectric encoder, the number output at any position is unique, so the photoelectric encoder is also called an absolute encoder.

[0022] The control circuit determines the specific position of the valve driven by the valve electric device according to the digital information provided by the photoelectric sensor. When the valve is in the fully closed position, the control circuit stops the motor in time. Similarly, when the valve is in the fully open position, the control circuit stops the motor in time. When used for adjustable electric devices, the control circuit can accurately output the opening position of the valve according to the digital information provided by the photoelectric encoder.

[0023] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set", "provided with", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Finally, it should be noted that the above embodiments are only specific implementation methods of the utility model, which are used to illustrate the technical solution of the utility model, rather than to limit it. The protection scope of the utility model is not limited thereto. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the above embodiments within the technical scope disclosed by the utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the utility model, and should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A valve electric actuator with a photoelectric encoder, comprising a valve electric actuator body and a travel transmission assembly arranged on the valve electric actuator body, wherein an output gear is arranged at the output end of the travel transmission assembly, and characterized in that: It also includes a sensing component for sensing the specific position of the valve, the sensing component includes a mounting bracket, a multi-stage transmission gear, an infrared emitting element and an infrared receiving element, the mounting bracket is fixed to one end of the main body of the valve electric actuator, the multi-stage transmission gear includes a plurality of transmission gears meshed in sequence, each transmission gear is rotatably connected to the mounting bracket, one of the transmission gears is meshed with the output gear, the infrared emitting element and the infrared receiving element have multiple groups, which are fixed to the mounting bracket and respectively arranged at the top and bottom ends of the edges of each transmission gear, and each transmission gear is provided with a through hole for the light of the infrared emitting element to pass through.

2. The electric valve actuator with a photoelectric encoder according to claim 1, characterized in that: The multi-stage transmission gear comprises a first-stage transmission gear, a second-stage transmission gear and a third-stage transmission gear which are meshed with each other in sequence. The transmission ratio between each stage of the transmission gear is 1:

10. The first-stage transmission gear is meshed with the output gear.

3. The electric valve actuator with a photoelectric encoder according to claim 2, characterized in that: Two adjacent transmission gears are meshed with each other through a transition gear.

4. The electric valve actuator with a photoelectric encoder according to claim 2, characterized in that: Each set of infrared emitting elements and infrared receiving elements has four pairs, which are respectively arranged at different positions of the corresponding transmission gears.

5. The valve electric actuator with a photoelectric encoder according to claim 2 or 4, characterized in that: A group of supporting plates arranged opposite to each other are fixed on the mounting bracket, and the infrared emitting element and the infrared receiving element are fixed on the supporting plates.

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