Rotation detection device

Abstract

The utility model relates to the field of detection equipment, and discloses a rotation detection device which comprises a connecting frame and at least two proximity switches, the connecting frame is installed on a shell of an air separator, the proximity switches are all installed on the connecting frame, the detection ends of the proximity switches are all aligned with a rotating shaft to be detected, and the proximity switches are arranged on the connecting frame. The proximity switches are all electrically connected with a control system of the winnowing device, and when all the proximity switches give an alarm at the same time, the winnowing device automatically stops. According to the utility model, the plurality of proximity switches are arranged to carry out redundancy detection on the rotating shaft, even if one of the proximity switches generates false detection due to faults such as overhigh temperature and poor contact, the winnowing device does not generate false shutdown, so that the probability of false detection is greatly reduced, and the probability of false shutdown of the winnowing device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a rotation detection device. Background Art

[0002] The air selector is one of the more important equipment in the cigarette production process. The air selector has an airflow cyclone separator. During the rotation process, the airflow cyclone separator can spray saturated steam to make the tobacco in the air selector expand and rehumidify evenly, so that the tobacco can maintain good working conditions in the subsequent process. In order to ensure the expansion and rehumidification effect of the tobacco, the speed of the airflow cyclone separator needs to be kept within the optimal speed range. Therefore, a proximity switch is installed on the air selector to detect the speed of the rotating shaft of the airflow cyclone separator. The proximity switch is electrically connected to the control system of the air selector. When the speed of the rotating shaft exceeds or is lower than the preset optimal speed range, the proximity switch will alarm, and then the air selector will automatically stop.

[0003] However, since only one proximity switch is installed on the air selector, the proximity switch may cause false detection due to excessive temperature, poor contact, etc. during actual operation, causing the air selector to shut down incorrectly, seriously affecting the processing efficiency of tobacco. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a rotation detection device to solve the problem pointed out in the background technology that since only one proximity switch is installed on the air selector, the proximity switch may cause false detection due to excessive temperature, poor contact, etc. during actual operation, causing the air selector to shut down incorrectly, seriously affecting the processing efficiency of tobacco.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] A rotation detection device, comprising a connecting frame and at least two proximity switches, wherein the connecting frame is mounted on a housing of an air selector, the proximity switches are all mounted on the connecting frame, and the detection ends of the proximity switches are all aligned with a rotating shaft to be detected, the proximity switches are all electrically connected to a control system of the air selector, and when all the proximity switches alarm at the same time, the air selector automatically stops.

[0007] Furthermore, a mounting plate and an angle adjustment assembly adapted to the proximity switch are mounted on the connecting frame, the proximity switch is detachably mounted on the mounting plate, the mounting plate is rotatably mounted on the connecting frame, and the angle adjustment assembly is used to drive the mounting plate to rotate.

[0008] Furthermore, the connecting frame has a mounting hole adapted to the mounting plate, the mounting plate is installed in the mounting hole, both ends of the mounting plate are fixed with rotating shafts, and the connecting frame is provided with shaft holes on both sides of the mounting hole, and the two rotating shafts are respectively rotatably installed in the shaft holes on the same side thereof.

[0009] Furthermore, the angle adjustment assembly includes a worm and an incomplete worm wheel, the incomplete worm wheel is fixed on one end of the mounting plate, and the axis of the incomplete worm wheel is colinear with the axis of the rotating shaft, and an installation space is provided on the connecting frame at a position close to the incomplete worm wheel, the worm is rotatably installed in the installation space, and the worm and the incomplete worm wheel are meshed with each other.

[0010] Furthermore, a driving rod is passed through and fixed on the worm, one end of the driving rod is rotatably mounted on the connecting frame, and a hand wheel is fixed on the other end of the driving rod.

[0011] Furthermore, the mounting plate is provided with a through hole adapted to the proximity switch, the proximity switch passes through the through hole, and two clamping threaded sleeves are threadedly connected to the proximity switch, and the two clamping threaded sleeves are respectively pressed against two sides of the mounting plate.

[0012] Beneficial effects of the utility model:

[0013] The present application performs redundant detection of the rotating shaft by setting up multiple proximity switches. Even if one of the proximity switches produces a false detection due to a fault such as overtemperature or poor contact, the air selector will not shut down incorrectly. This greatly reduces the probability of false detection and reduces the probability of the air selector shutting down incorrectly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a structural schematic diagram of a rotation detection device in an embodiment of the present application;

[0015] Figure 2 is a cross-sectional view of a rotation detection device in an embodiment of the present application;

[0016] Figure 3 is an exploded schematic diagram of a rotation detection device in an embodiment of the present application;

[0017] Among them, 100, connecting frame; 110, mounting hole; 120, shaft hole; 130, mounting space; 200, proximity switch; 210, clamping threaded sleeve; 300, mounting plate; 310, rotating shaft; 320, through hole; 400, worm; 410, driving rod; 420, handwheel; 500, incomplete worm gear. DETAILED DESCRIPTION

[0018] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0019] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the figures, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0020] like Figure 1-3 As shown, the embodiment of the present application provides a rotation detection device, which is mainly used in the air selector mentioned in the background technology, and is used to detect whether the rotating shaft of the air flow cyclone separator in the air selector is within the optimal speed range. Of course, the rotation detection device of this embodiment can also be used on other rotating parts that need speed control.

[0021] In this embodiment, the rotation detection device includes a connecting frame 100 and at least two proximity switches 200. In this embodiment, the number of proximity switches 200 is preferably two. The connecting frame 100 is fixed to the housing of the air selector by bolt connection, and all proximity switches 200 are installed on the connecting frame 100, and the detection ends of all proximity switches 200 are aligned with the rotating shaft to be detected. In addition, all proximity switches 200 are electrically connected to the control system of the air selector. When all proximity switches 200 alarm at the same time, the air selector will automatically shut down. By setting multiple proximity switches 200 to perform redundant detection on the rotating shaft, even if one of the proximity switches 200 generates a false detection due to faults such as overtemperature and poor contact, the air selector will not shut down by mistake, which greatly reduces the probability of false detection, so that the probability of the air selector shutting down by mistake is reduced.

[0022] In this embodiment, a mounting plate 300 and an angle adjustment assembly adapted to the proximity switch 200 are installed on the connecting frame 100, and each proximity switch 200 is equipped with a set of mounting plates 300 and angle adjustment assemblies. The proximity switch 200 is detachably mounted on the mounting plate 300, and the mounting plate 300 is rotatably mounted on the connecting frame 100, and the angle adjustment assembly is mainly used to drive the mounting plate 300 to rotate. Through such a setting, it is easy to adjust the angle of the proximity switch 200, so that the detection end of the proximity switch 200 can be more accurately aligned with the rotating axis to be detected, thereby improving the detection accuracy.

[0023] In this embodiment, the connecting frame 100 has a mounting hole 110 adapted to the mounting plate 300, and the mounting plate 300 is mounted in the mounting hole 110. A rotating shaft 310 is fixed at both ends of the mounting plate 300, and the connecting frame 100 is provided with shaft holes 120 on both sides of the mounting hole 110, and the two rotating shafts 310 are rotatably mounted in the shaft holes 120 on the same side thereof. By such a configuration, the mounting plate 300 can be rotatably mounted on the connecting frame 100.

[0024] In this embodiment, the angle adjustment assembly includes a worm 400 and an incomplete worm wheel 500. The incomplete worm wheel 500 is a partial structure of a complete worm wheel. The incomplete worm wheel 500 is fixed to one end of the mounting plate 300, and the axis of the incomplete worm wheel 500 is colinear with the axis of the rotating shaft 310. The connecting frame 100 is provided with an installation space 130 near the incomplete worm wheel 500. The worm 400 is rotatably installed in the installation space 130, and the worm 400 and the incomplete worm wheel 500 are meshed with each other. By setting it in this way, when the angle of the proximity switch 200 needs to be adjusted, the worm 400 can be rotated, and the worm 400 drives the mounting plate 300 to rotate through the incomplete worm wheel 500, so as to adjust the angle of the proximity switch 200, which is very convenient. In addition, the purpose of adjustment is achieved by the way of the worm wheel and worm 400, and it also has a self-locking function, so that the mounting plate 300 can be kept fixed at any angle.

[0025] In this embodiment, a driving rod 410 is passed through and fixed on the worm 400, one end of the driving rod 410 is rotatably mounted on the connecting frame 100, and a hand wheel 420 is fixed on the other end of the driving rod 410. Through such an arrangement, when the worm 400 needs to be rotated, the worm 400 can be driven to rotate directly by rotating the hand wheel 420, and the adjustment is very convenient.

[0026] In this embodiment, the mounting plate 300 is provided with a through hole 320 adapted to the proximity switch 200. When the proximity switch 200 is installed, the detection end of the proximity switch 200 can be passed through the through hole 320. Two clamping threaded sleeves 210 are threadedly connected to the proximity switch 200. When the proximity switch 200 needs to be fixed, the two clamping threaded sleeves 210 can be directly pressed against the two sides of the mounting plate 300. In addition, the distance between the detection end of the proximity switch 200 and the rotating shaft to be detected can also be adjusted by adjusting the position of the clamping threaded sleeves 210, so as to ensure that the proximity switch 200 can detect the rotation of the rotating shaft.

[0027] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. A rotation detection device, characterized in that: The rotation detection device comprises a connecting frame (100) and at least two proximity switches (200); the connecting frame (100) is mounted on a housing of a winnowing device; the proximity switches (200) are all mounted on the connecting frame (100), and the detection ends of the proximity switches (200) are all aligned with a rotating shaft to be detected; the proximity switches (200) are all electrically connected to a control system of the winnowing device; when all the proximity switches (200) sound an alarm at the same time, the winnowing device automatically stops.

2. The rotation detection device according to claim 1, characterized in that: A mounting plate (300) adapted to the proximity switch (200) and an angle adjustment assembly are mounted on the connecting frame (100); the proximity switch (200) is detachably mounted on the mounting plate (300); the mounting plate (300) is rotatably mounted on the connecting frame (100); and the angle adjustment assembly is used to drive the mounting plate (300) to rotate.

3. The rotation detection device according to claim 2, characterized in that: The connecting frame (100) has a mounting hole (110) adapted to the mounting plate (300), the mounting plate (300) is mounted in the mounting hole (110), both ends of the mounting plate (300) are fixed with rotating shafts (310), the connecting frame (100) is provided with shaft holes (120) on both sides of the mounting hole (110), and the two rotating shafts (310) are rotatably mounted in the shaft holes (120) on the same side thereof.

4. The rotation detection device according to claim 3, characterized in that: The angle adjustment assembly comprises a worm (400) and an incomplete worm wheel (500), wherein the incomplete worm wheel (500) is fixed on one end of the mounting plate (300), and the axis of the incomplete worm wheel (500) is colinear with the axis of the rotating shaft (310), and an installation space (130) is provided on the connecting frame (100) at a position close to the incomplete worm wheel (500), and the worm (400) is rotatably mounted in the installation space (130), and the worm (400) and the incomplete worm wheel (500) are meshed with each other.

5. The rotation detection device according to claim 4, characterized in that: A driving rod (410) is passed through and fixed on the worm (400), one end of the driving rod (410) is rotatably mounted on the connecting frame (100), and a hand wheel (420) is fixed on the other end of the driving rod (410).

6. The rotation detection device according to claim 2, characterized in that: The mounting plate (300) is provided with a through hole (320) adapted to the proximity switch (200), the proximity switch (200) passes through the through hole (320), and the proximity switch (200) is threadedly connected with two clamping thread sleeves (210), and the two clamping thread sleeves (210) are respectively pressed against two sides of the mounting plate (300).

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