Longitudinal tear protection device

Abstract

The utility model relates to a mine equipment technical field especially relates to a longitudinal tear protection device, it includes: support, telescopic receiving plate, photoelectric sensor and at least two material guide groove. Telescopic receiving plate is located on the support, photoelectric sensor is located on the support, has emission end and receiving end, determines the object existing inboard of support through the light path between emission end and receiving end whether continuous to detect, material guide groove is arranged respectively at both ends of support. The longitudinal tear protection device provided by the utility model adopts telescopic receiving plate, can match the conveyer belt device of different size, improves equipment adaptation rate, adopts photoelectric sensor to detect whether the conveyer belt device bottom has material or conveyer belt falls, thereby realizes longitudinal tear protection, adopts material guide groove and leads the material scattering of conveyer belt device two sides to the support both sides, avoids the problem that sensor detects material scattering leads to false detection, thereby improves detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, and in particular to a longitudinal tear protection device. Background Technology

[0002] As a crucial piece of equipment in the main transportation system, coal mine belt conveyors already have mature and reliable operation monitoring and protection systems. Among these, longitudinal tear protection, as one of the six major protection systems, is widely used underground. The main purpose of this protection is to trigger an alarm and shutdown system when foreign object penetration, material leakage, or damage to the conveyor belt structure is detected, preventing longitudinal tears from expanding and causing equipment damage and production interruption.

[0003] Currently, wire rope triggering is mainly used underground, with light curtain sensing or load sensing in a few cases. Due to the frequent need for "frame pulling" at tunneling sites and the weak infrastructure at equipment installation sites, existing integrated longitudinal tear protection systems suffer from problems such as low equipment compatibility (due to various conveyor belt systems underground, such as 80-meter and 1-meter belts, depending on the freight volume and equipment operating environment), inconvenient installation and transportation (integrated longitudinal tear protection systems generally use wired signal transmission and are usually bulky), and frequent false alarms (false alarms due to improper material feeding, coal spillage, water and coal alarms due to factors such as excessive water supply or dust control). Utility Model Content

[0004] This utility model provides a longitudinal tear protection device to solve the defects of low compatibility and false alarm in existing longitudinal tear protection devices. It adopts a telescopic receiving plate and bracket to match different equipment, uses a dual-sensor signal transmission and reception form, and works with a guide trough to avoid false detection caused by material spillage on both sides of the conveyor belt, thus ensuring accurate detection.

[0005] This utility model provides a longitudinal tear protection device, comprising: The support frame is located below the conveyor belt assembly; A retractable support plate is provided on the bracket; A photoelectric sensor, mounted on the bracket, has a transmitter and a receiver. It determines whether there is an object inside the bracket by detecting whether the optical path between the transmitter and the receiver is continuous. At least two material guide channels are respectively disposed at both ends of the bracket to guide the material from both sides out of the optical path between the transmitter and the receiver.

[0006] The longitudinal tear protection device according to this utility model also includes: A reflector is located at one end of the bracket; Both the transmitter and the receiver are located at the other end of the bracket. The light emitted by the transmitter is reflected by the reflector and can be received by the receiver. Two material guide channels are provided, with one material guide channel located on top of the reflector and the other material guide channel located on top of the photoelectric sensor.

[0007] According to the longitudinal tear protection device of this utility model, the bracket includes: First vertical beam; The second vertical beam is arranged parallel to the first vertical beam; A horizontal beam connects the first vertical beam and the second vertical beam.

[0008] According to the longitudinal tear protection device of this utility model, the retractable receiving plate includes: First plate; The second plate is movably inserted into one end of the first plate; The third plate is movably inserted into the other end of the first plate.

[0009] The longitudinal tear protection device according to this utility model also includes: A first support box is detachably disposed at one end of the bracket, and the photoelectric sensor is disposed in the first support box; The second support box is detachably disposed at the other end of the bracket and is disposed opposite to the first support box, and the reflector is disposed in the second support box.

[0010] According to the longitudinal tear protection device of this utility model, the first support box and the second support box are respectively provided with mounting grooves, and the telescopic receiving plate is inserted into the mounting grooves.

[0011] According to the longitudinal tear protection device of this utility model, a first positioning hole is formed on both the first support box and the second support box; The longitudinal tear protection device also includes: The clamp has a second positioning hole and is adapted to mate with the first positioning hole; The pins are inserted into the first positioning hole and the second positioning hole in sequence to fix the first support box and the second support box on the bracket.

[0012] According to the longitudinal tear protection device of this utility model, the guide groove includes: Multiple guide plates are arranged to form a trough structure.

[0013] The longitudinal tear protection device according to this utility model also includes: Two first overlapping members are respectively disposed on the top of the first vertical beam and the second vertical beam for connection with the conveyor belt device.

[0014] The longitudinal tear protection device according to this utility model also includes: Two second overlapping pieces are respectively disposed on the first vertical beam and the second vertical beam, for connecting with the straight roller.

[0015] This utility model provides a longitudinal tear protection device, comprising: a bracket, a retractable receiving plate, a photoelectric sensor, and at least two guide troughs. The bracket is located below the conveyor belt device; the retractable receiving plate is mounted on the bracket; the photoelectric sensor, mounted on the bracket, has a transmitting end and a receiving end, and determines the presence of an object inside the bracket by detecting whether the optical path between the transmitting end and the receiving end is continuous; the guide troughs are respectively located at both ends of the bracket, used to guide the spilled material from both sides outward from the outside of the optical path between the transmitting end and the receiving end. This utility model provides a longitudinal tear protection device that uses a retractable receiving plate, which can match conveyor belt devices of different sizes, improving equipment adaptability; it uses a photoelectric sensor to detect whether there is material or conveyor belt falling at the bottom of the conveyor belt device, thereby achieving longitudinal tear protection; and it uses guide troughs to guide the spilled material from both sides of the conveyor belt device to both sides of the bracket, avoiding the problem of false detection caused by the sensor detecting spilled material, thereby improving detection accuracy. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the longitudinal tear protection device provided in one embodiment of the present invention.

[0018] Figure 2 This is a front view of the longitudinal tear protection device provided in one embodiment of the present invention.

[0019] Figure 3 This is a front view of the bracket provided in one embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of the bracket provided in one embodiment of the present invention. Figure 5 This is a structural schematic diagram of the first support box, clamp, and pin provided in one embodiment of the present invention.

[0021] Figure 6 This is an exploded view of the first support box, clamp, and pin provided in one embodiment of the present invention.

[0022] Figure 7This is a schematic diagram of the material guide groove provided in one embodiment of the present invention.

[0023] Figure 8 This is a schematic diagram of the structure of the electronic device provided by this utility model.

[0024] Figure label: 1: Bracket; 11: First vertical beam; 12: Second vertical beam; 13: Horizontal beam; 2: Telescopic support plate; 21: First plate; 22: Second plate; 23: Third plate; 3: Photoelectric sensor; 4: Reflector; 5: Material guide chute; 51: Material guide plate; 61: First support box; 62: Clamp; 63: Pin; 64: Mounting slot; 7: First overlapping piece; 8: Second overlapping piece. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this embodiment and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this embodiment.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this embodiment, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this embodiment, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" 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 communication 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 embodiment based on the specific circumstances.

[0029] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] The following is combined Figures 1-8 This invention describes a longitudinal tear protection device. The longitudinal tear protection device includes: a support 1, a retractable receiving plate 2, a photoelectric sensor 3, and at least two guide troughs 5.

[0031] The bracket 1 is located below the conveyor belt device; the retractable receiving plate 2 is mounted on the bracket 1; the photoelectric sensor 3 is mounted on the bracket 1 and has a transmitting end and a receiving end. It determines whether there is an object inside the bracket 1 by detecting whether the optical path between the transmitting end and the receiving end is continuous; the material guide troughs 5 are respectively set at both ends of the bracket 1 and are used to guide the material from both sides out of the optical path between the transmitting end and the receiving end.

[0032] Specifically, the bracket 1 serves as the overall support for the device, and is used to install and mount the retractable support plate 2, the photoelectric sensor 3, and the guide chute 5. The retractable support plate 2 is mounted on the bracket 1 and can extend and retract horizontally to accommodate conveyor belt devices of different sizes.

[0033] Specifically, the form of the photoelectric sensor 3 is not limited. It can have the transmitter and receiver positioned opposite each other at opposite ends of the bracket 1, or it can have the transmitter and receiver positioned at one end of the bracket. Light is reflected using a reflector (or reflector plate) to ensure that the light travels along the width of the conveyor belt. If there is no obstruction between the transmitter and receiver, a signal can be received normally, indicating that the conveyor belt device is functioning normally. If there is an obstruction between the transmitter and receiver, a signal cannot be received, indicating the presence of a foreign object, which suggests that the conveyor belt device is damaged, causing material or the conveyor belt to fall. In this case, the sensor sends an electrical signal to the conveyor belt control system to trigger an emergency stop and issue a warning.

[0034] At least two guide troughs 5 are provided, and at least one guide trough 5 is provided at each end of the support 1. The spilled material due to improper feeding is guided to both sides of the support 1 through the guide troughs 5, so as to avoid the problem of false detection caused by the sensor due to the spilled material on both sides of the conveyor belt device, thereby improving the detection accuracy.

[0035] This utility model provides a longitudinal tear protection device, comprising: a support 1, a retractable receiving plate 2, a photoelectric sensor 3, and at least two guide troughs 5. The support 1 is located below the conveyor belt device; the retractable receiving plate 2 is mounted on the support 1; the photoelectric sensor 3 is mounted on the support 1 and has a transmitting end and a receiving end, determining the presence of an object inside the support 1 by detecting whether the optical path between the transmitting end and the receiving end is continuous; the guide troughs 5 are respectively located at both ends of the support 1, used to guide the spilled material from both sides outwards from the outside of the optical path between the transmitting end and the receiving end. This utility model provides a longitudinal tear protection device that uses a retractable receiving plate 2, which can match conveyor belt devices of different sizes, improving equipment adaptability; it uses a photoelectric sensor 3 to detect whether there is material or conveyor belt falling at the bottom of the conveyor belt device, thereby achieving longitudinal tear protection; and it uses guide troughs 5 to guide the spilled material from both sides of the conveyor belt device to both sides of the support 1, avoiding false detections caused by the sensor detecting spilled material, thereby improving detection accuracy.

[0036] In one embodiment of this utility model, the longitudinal tear protection device further includes: a reflector 4, which is disposed at one end of the support 1. Both the emitting end and the receiving end are disposed at the other end of the support 1. Light emitted from the emitting end is reflected by the reflector 4 and received by the receiving end. Two guide channels 5 are provided, with one guide channel 5 located on top of the reflector 4 and the other guide channel 5 located on top of the photoelectric sensor 3. Specifically, the emitting end is typically an infrared LED or laser diode, capable of continuously emitting a modulated light pulse; this light beam illuminates a specially designed reflector, which is composed of many special prisms or microbead arrays, capable of accurately reflecting the incident light back along its original path; the receiving end uses a phototransistor / diode, capable of detecting the light signal returned from the reflector; the intensity of the received light signal is analyzed by the circuitry inside the sensor. If the receiver can stably receive sufficiently strong reflected light, the sensor output state is "no object" (usually off or low level); if the object being measured enters the optical path and blocks the light beam, the receiver cannot receive or can only receive a very weak light signal. The sensor detects this change and the output state switches to "object present" (usually on or high level).

[0037] Furthermore, the photoelectric sensor 3 adopts an integrated structure: the transmitter and receiver are integrated into the same housing and located at one end of the bracket 1; core components include: LED / laser tube, lens, photosensitive element, signal processing circuit, and output circuit; wiring typically involves three or four wires (positive power, negative power, output signal, and sometimes normally closed output). The reflector 4 is located at the other end of the bracket 1 and is composed of numerous pyramidal prisms or high-refractive-index glass microspheres. This structure ensures that light is reflected back to the source regardless of its angle of incidence. The reflector is usually a red or gray plastic plate with a honeycomb or dot matrix structure on its surface.

[0038] The photoelectric sensor 3 and reflector 4 with the above structure have the following advantages: 1. Long detection distance: Because the retroreflection efficiency of reflector 4 is very high and the light loss is small, its detection distance is much longer than that of diffuse reflection type, usually reaching several meters or even tens of meters.

[0039] 2. Strong anti-interference ability: A. Modulated light: The sensor emits modulated light pulses of a specific frequency (e.g., 38kHz), and only reflected light of the same frequency will be recognized by the receiver. This effectively filters out interference from ambient light (such as sunlight and artificial light).

[0040] B. Polarizing Filter: Many high-end models are equipped with a polarizing filter. The emitted light first passes through a polarizer to become polarized light, and the reflector 4 also has a polarizer at a specific angle. Only light that has returned correctly from the reflector 4 and whose polarization direction has been changed can pass through the receiver's polarizer. This can eliminate false triggering caused by specular reflection from smooth object surfaces (such as glass and metal).

[0041] 3. Installation and calibration are relatively convenient: simply align the sensor and reflector. This is more convenient than through-beam type (which requires separate installation and precise alignment of the transmitter and receiver), but more stable and reliable than diffuse reflection type.

[0042] 4. High cost performance: For medium and long distance detection, it is less expensive than through-beam sensors that require two cables.

[0043] Due to the limited space in the alleyway, photoelectric sensor 3 can be installed on the pedestrian side. This sensor is wired, and its signal transmission and power supply both rely on the existing control system. In order to avoid deploying devices that need to interact with the existing system on the non-pedestrian side, a reflector-type photoelectric sensor was selected.

[0044] In one embodiment of this utility model, the support 1 includes a first vertical beam 11, a second vertical beam 12, and a horizontal beam 13. The second vertical beam 12 is arranged parallel to the first vertical beam 11; the horizontal beam 13 is horizontally connected between the first vertical beam 11 and the second vertical beam 12. Specifically, the first vertical beam, the second vertical beam, and the horizontal beam 13 form an H-shaped support 1, thereby supporting the retractable receiving plate 2, the photoelectric sensor 3, the reflector 4, and the guide trough 5.

[0045] In one embodiment of this utility model, the telescopic receiving plate 2 includes: a first plate 21, a second plate 22, and a third plate 23. The second plate 22 is movably inserted into one end of the first plate 21; the third plate 23 is movably inserted into the other end of the first plate 21. Specifically, the telescopic receiving plate 2 is composed of three plates that are movably inserted together. By adjusting the insertion positions of the second plate 22 and the third plate 23 on the first plate 21, the telescopic length of the telescopic receiving plate 2 can be adjusted to meet the size requirements of different conveyor belt devices.

[0046] In one embodiment of this utility model, the longitudinal tear protection device further includes a first support box 61 and a second support box. The first support box 61 is detachably disposed at one end of the bracket 1, and the photoelectric sensor 3 is disposed in the first support box 61. The second support box is detachably disposed at the other end of the bracket 1 and is opposite to the first support box, and the reflector 4 is disposed in the second support box. In this embodiment, the photoelectric sensor 3 is installed through the first support box 61, and the reflector 4 is installed through the second support box. Furthermore, the first and second support boxes are detachably installed at both ends of the bracket 1, using a modular installation structure, which facilitates disassembly and transportation, and allows for on-site assembly. Compared to the integrated structure in the prior art, the detachable support box structure and the connection structure of the bracket 1 in this embodiment have advantages such as smaller size and easier installation and transportation. The first and second support boxes have the same structure.

[0047] In one embodiment of this utility model, the first support box 61 and the second support box are respectively provided with mounting grooves 64, and the retractable support plate 2 is inserted into the mounting grooves 64. In this embodiment, by providing mounting grooves 64 on the support boxes, the retractable support plate 2 can be installed by insertion, thereby fixing the retractable support plate 2 and realizing the detachable structure of the retractable support plate 2.

[0048] In one embodiment of this utility model, both the first support box 61 and the second support box have first positioning holes. The longitudinal tear protection device further includes a clamp 62 and a pin 63. The clamp 62 has a second positioning hole and is adapted to cooperate with the first positioning hole; the pin 63 is inserted into the first positioning hole and the second positioning hole in sequence to fix the first support box 61 and the second support box on the bracket 1. Specifically, both the first support box 61 and the second support box are fixed to the vertical beam of the bracket 1 by clamps 62, and the clamps 62 are fixed to the first support box 61 / second support box by the pins 63 passing through the first positioning hole and the second positioning hole in sequence.

[0049] In one embodiment of this utility model, the guide trough 5 includes a plurality of guide plates 51, which are arranged to form a trough structure. In this embodiment, the plurality of guide plates 51 are inclined and arranged to form a trough structure, thereby forming the guide trough 5.

[0050] In one embodiment of the present invention, the longitudinal tear protection device further includes two first overlapping members 7, which are respectively disposed on the top of the first vertical beam 11 and the second vertical beam 12, for connection with the conveyor belt device.

[0051] In one embodiment of the present invention, the longitudinal tear protection device further includes two second overlapping members 8, which are respectively disposed in the middle of the first vertical beam 11 and the second vertical beam 12, for connecting with the straight roller.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A longitudinal tear protection device, characterized in that, include: The support (1) is located below the conveyor belt device; A retractable support plate (2) is provided on the bracket (1); A photoelectric sensor (3) is mounted on the bracket (1) and has a transmitter and a receiver. It determines whether there is an object inside the bracket (1) by detecting whether the optical path between the transmitter and the receiver is continuous. At least two material guide grooves (5) are respectively set at both ends of the bracket (1) to guide the material from both sides out of the optical path between the transmitter and the receiver.

2. The longitudinal tear protection device according to claim 1, characterized in that, Also includes: A reflector (4) is disposed at one end of the bracket (1); The transmitting end and the receiving end are both located at the other end of the bracket (1). The light emitted by the transmitting end is reflected by the reflector (4) and can be received by the receiving end. Two guide troughs (5) are provided, one of which is located on top of the reflector (4), and the other is located on top of the photoelectric sensor (3).

3. The longitudinal tear protection device according to claim 1, characterized in that, The support (1) includes: First vertical beam (11); The second vertical beam (12) is arranged parallel to the first vertical beam (11); A horizontal beam (13) is horizontally connected between the first vertical beam (11) and the second vertical beam (12).

4. The longitudinal tear protection device according to claim 1, characterized in that, The retractable support plate (2) includes: First plate (21); The second plate (22) is movably inserted into one end of the first plate (21); The third plate (23) is movably inserted into the other end of the first plate (21).

5. The longitudinal tear protection device according to claim 2, characterized in that, Also includes: The first support box (61) is detachably disposed at one end of the bracket (1), and the photoelectric sensor (3) is disposed in the first support box (61). The second support box is detachably disposed at the other end of the bracket (1) and is disposed opposite to the first support box, and the reflector (4) is disposed in the second support box.

6. The longitudinal tear protection device according to claim 5, characterized in that, The first support box (61) and the second support box are respectively provided with mounting grooves (64), and the retractable support plate (2) is inserted into the mounting grooves (64).

7. The longitudinal tear protection device according to claim 5, characterized in that, Both the first support box (61) and the second support box have first positioning holes formed on them; The longitudinal tear protection device also includes: The clamp (62) has a second positioning hole and is adapted to mate with the first positioning hole; The pin (63) is inserted into the first positioning hole and the second positioning hole in sequence to fix the first support box (61) and the second support box on the bracket (1).

8. The longitudinal tear protection device according to claim 1, characterized in that, The feed trough (5) includes: Multiple guide plates (51) are arranged to form a trough structure.

9. The longitudinal tear protection device according to claim 3, characterized in that, Also includes: Two first overlapping pieces (7) are respectively disposed on the top of the first vertical beam (11) and the second vertical beam (12) for connecting to the conveyor belt device.

10. The longitudinal tear protection device according to claim 3, characterized in that, Also includes: Two second overlapping pieces (8) are respectively disposed on the first vertical beam (11) and the second vertical beam (12) for connecting with the straight roller.

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